CN102095155A - Light-emitting unit and illumination fixture using the same - Google Patents

Light-emitting unit and illumination fixture using the same Download PDF

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Publication number
CN102095155A
CN102095155A CN2010105691972A CN201010569197A CN102095155A CN 102095155 A CN102095155 A CN 102095155A CN 2010105691972 A CN2010105691972 A CN 2010105691972A CN 201010569197 A CN201010569197 A CN 201010569197A CN 102095155 A CN102095155 A CN 102095155A
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light
mentioned
wavelength conversion
emitting device
conversion portion
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CN102095155B (en
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田中健一郎
清积克行
葛原一功
西冈浩二
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Priority claimed from JP2009268110A external-priority patent/JP5443959B2/en
Priority claimed from JP2010014820A external-priority patent/JP5658462B2/en
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Abstract

The invention provides an illumination device including a plurality of light emitting devices of different emission colors, a control device for controlling an optical output ratio of the plurality of light emitting devices and able to change a color tone in mixed color light radiated from the light emitting devices of different emission colors, wherein the light emitting devices are respectively provided with an LED chip (light emitting element) and a first wavelength conversion part. The first wavelength conversion part absorbs at least a part of light radiated from the LED chip and converting the wavelength to emit fluorescence; and a part of the plurality of light emitting devices includes a second wavelength conversion part for converting wavelengths of at least a part of the light radiated from at least one of the LED chip and the first wavelength conversion part into an emission color different from the emission color of the light radiated from the LED chip and the first wavelength conversion part.

Description

Luminescence unit and use the lighting device of this luminescence unit
Technical field
The lighting device that the present invention relates to possess the luminescence unit of the different a plurality of light-emitting devices of illuminant colour and use this luminescence unit, these a plurality of light-emitting devices possess semiconductor light-emitting elements.
Background technology
In recent years, developed a kind of light-emitting device that uses light-emitting component, this light-emitting component is made of the semiconductor light-emitting elements such as led chip that can send to high output R (redness), G (green), B (blueness) light.In addition, also developed a kind of light-emitting device, it possesses: light-emitting component is made of semiconductor light-emitting elements such as led chips; And wavelength conversion portion, constituting by the transparent member that covers this light-emitting component and contain fluorophor, this fluorophor will absorb from least a portion of the light of this light-emitting component and carry out wavelength conversion and send the fluorescence that becomes complementary colours; This light-emitting device for example in the future the blue light of self-emission device carry out colour mixture and radiate white light with sodium yellow from wavelength conversion portion.These light-emitting devices are used in lighting device along with the high efficiency of the light output of each light-emitting component.
But, in the lighting device that has utilized these light-emitting devices, in order to make the white light etc. that becomes the color temperature of hope from the tone of the light of lighting device radiation, sometimes illuminant colour is different multiple light-emitting devices is installed on the same substrate, and output is adjusted and made it luminous to the light of each light-emitting device.
For example, as the lighting device that possesses the different multiple light-emitting device of illuminant colour, known following lighting device, it possesses: first light-emitting device (as the White LED that sends white light of main light source), in the xy chromatic diagram of XYZ color specification system shown in Figure 11, color temperature is set to chroma point (below the be called white point) W of the centre of two chroma point Wmin, Wmax on the black body locus BL; Second light-emitting device (first secondary light source) from the Wmin overtime, sends peak wavelength at the line segment that will connect the lower chroma point Wmin of white point W and color temperature near the some L1 that intersects with spectrum locus SL; And the 3rd light-emitting device (second secondary light source), from the Wmax overtime, near the some S1 that intersects with spectrum locus SL, send peak wavelength at the line segment that will connect the higher chroma point Wmax of white point W and color temperature; On black body locus BL, can access and mixed light (for example with reference to patent documentation 1) as the different color temperature of the color temperature of first light-emitting device of main light source.
This lighting device is for first light-emitting device of the white point W that is set at the regulation color temperature, utilization has second and third light-emitting device that the correcting colour of peak wavelength is used at the wavelength domain of appointment, by carrying out colour mixture with the light that radiates from second and third light-emitting device, not only can carry out to carry out the correction of color rendering from the correction of the color temperature of the light of lighting device radiation.
In addition, in the lighting device of above-mentioned patent documentation 1, for example, first light-emitting device constitutes, to send the YAG fluorophor combination that the blue led chip of peak wavelength radiates yellow fluorescence with being encouraged by the blue light from this blue led chip radiation at the wavelength domain of 450～460nm, and send white light.In addition, second light-emitting device use 590nm send peak wavelength the AlInGaP class orange led chip and constitute.And, the 3rd light-emitting device use the wavelength domain at 470～480nm send peak wavelength the InGaN class the blue led chip and constitute.Such lighting device is specially adapted to shadowless lamp, parlor indoor lamp, cosmetic lamp etc.
In addition, known a kind of lighting device as shown in figure 12 possesses: light-emitting device 110, only utilized the blue led chip that radiates blue light; Light-emitting device 111 has the blue led chip and absorbs blue light and radiate the green-emitting phosphor of green light; Light-emitting device 112 has the blue led chip and absorbs blue light and radiate the red-emitting phosphors of red light; Light-emitting device 113 has the blue led chip and absorbs blue light and radiate the yellow fluorophor of sodium yellow; Light-emitting device 114 only utilizes the green LED chip; And control device 120, control the light output (for example with reference to patent documentation 2) separately of each light-emitting device 110～114.
The lighting device of patent documentation 2 utilizes the different a plurality of light-emitting devices of illuminant colour, the lighting device that can provide higher from the color rendering of the light of lighting device radiation, can make lightness and tone variations.
In addition, light-emitting device is used in backlight, the portable electric lamp of mobile phone or decorative lighting etc.Light-emitting device is along with the luminous efficiency of semiconductor light-emitting elements uprises, with incandescent lamp, Halogen lamp LED, mercury vapor lamp or fluorescent lamp etc. are compared as the lighting device of light source all the time, consumption electric power is low and the life-span is long, is therefore expected as follow-on general illumination device.
As this light-emitting device, for example known shown in Figure 13 (a) such light-emitting device, it possesses: as the led chip 1 of the semiconductor light-emitting elements that sends blue light; And wavelength conversion parts 2, have absorption from the blue light of this led chip 1 and send the fluorescent material 33 of yellow fluorescence; By from the blue light of led chip 1 and colour mixture, send white light (for example patent documentation 3) thus from the sodium yellow of wavelength conversion parts 2.
In addition, the light-emitting device of Figure 13 (a) is to be provided with a pair of electric terminal 31,31 in shell 3 inside of light-emitting device.Led chip 1 constitutes, and installs and is connected electrically on the electric terminal 31, and the electrode of the opposing face side that is installed in a led chip 1 on the electric terminal 31 is electrically connected with another electric terminal 31 via metal wire 32, and can power.
In addition, as other light-emitting devices, the light-emitting device shown in known Figure 13 (b), it possesses: the light emitting diode 36 that sends white light; And wavelength conversion portion 6 ', will be transformed to indigo plant, other wavelength light such as green, yellow or red from the white light of this light emitting diode 36, the circumstances in which people get things ready for a trip of going forward side by side key whole and luminous (for example patent documentation 4).
Light-emitting device shown in Figure 13 (b) constitutes, and configuration light emitting diode 36 in the recess of shell 3 can be by 36 power supplies of 31 pairs of light emitting diodes of electric terminal.In addition, light-emitting device is, by luminous from light emitting diode 36 and via the light α of sealing 34 transmission peak wavelength transformation components 6 ' and from light emitting diode 36 the light β of reflection parts 35 reflection back transmission peak wavelength transformation components 6 ' luminous and that be provided with on the surface of above-mentioned recess via sealing 34, improve the utilization ratio of light.
Patent documentation 1: international open WO03/019072 communique
Patent documentation 2: the open 2007-122950 communique of Japan Patent
Patent documentation 3: the open 2004-31989 communique of Japan Patent
Patent documentation 4: the open 2009-86468 communique of Japan Patent
But, the lighting device of above-mentioned patent documentation 1, owing in each different light-emitting device of illuminant colour, use the used different led chip of semi-conducting material, therefore the initial characteristics of luminescence of led chip and variation characteristic difference in time, the problem of existence is: change, produce aberration from the tone of the light of lighting device radiation according to drive current, the passing through etc. of temperature, all Wall environment or time of light-emitting device when using.
In addition, in the lighting device of above-mentioned patent documentation 2, owing to use blue led chip that sends blue light and the green LED chip that sends green light as led chip, therefore the differences such as ratio of components of semi-conducting material, also there are the following problems: by the initial characteristics of luminescence of led chip and in time variation characteristic differently cause, change, produce aberration according to drive current, the passing through etc. of temperature, all Wall environment or time of light-emitting device when using from the tone of the light of lighting device radiation.In addition, if the light-emitting device 110,111,112 in 5 kinds of light-emitting devices 110 to 114 of use patent documentation 2, then also can only use the blue led chip to be used as the led chip of the different light-emitting device of illuminant colour, but the problem that exists is: only utilize the directional property of light-emitting device 110 of blue led chip stronger than the directional property of other light-emitting devices 111,112, blue illuminant colour is showy, and colour mixture is lower.
But lighting device is by making up the different light-emitting devices of illuminant colour such as R, G, B respectively and often adjust the light output from the radiation of each light-emitting device, can also keep mixed light luminous of the tone that becomes hope thus.For example can consider with detected from the part of the light of lighting device radiation by optical sensor etc., and the output of the light of each light-emitting device of illumination apparatus carries out FEEDBACK CONTROL, obtain the light of stable tone thus from lighting device.
But when lighting device will be arranged at the control device to the feedback control circuit portion that carries out FEEDBACK CONTROL from the light output of the light of each light-emitting device radiation, the structure of control device became more complicated and becomes high price.In addition, under the situation of the raising of seeking lighting device light taking-up efficient on the whole, the system effectiveness in the control device that possesses feedback circuit portion of lighting device also is a problem.
Especially, lighting device is required higher light output, the light output that is used for the LED illumination device chip is big more, from the light of lighting device radiation because the initial characteristics of luminescence, environment for use or the difference of variation characteristic in time, and exist as the significant more tendency of aberration, only the structure by above-mentioned lighting device is inadequate, requires further improvement.
In addition, in the past with the general illumination device as light source such as fluorescent lamp,, can change to the light along the color temperature of the hope of blackbody radiation such as daylight look, daytime white, white, warm white or bulb with comparalive ease by the replacing of fluorescent lamp.
With respect to this, possess the above-mentioned light-emitting device of above-mentioned semiconductor light-emitting elements, lower, the above-mentioned semiconductor light-emitting elements of the electrostatic withstand voltage with above-mentioned semiconductor light-emitting elements is easy ruined character owing to handle.Therefore, in most cases the user is difficult to directly do not contacting the inside that under the situation of above-mentioned light-emitting device etc. it is configured in lighting device and changing.Thereby, in the above-mentioned lighting device of the light-emitting device that will possess above-mentioned semiconductor light-emitting elements, make from color temperature, colourity and the color rendering of the light of above-mentioned lighting device irradiation with regard to determining from design phase of above-mentioned light-emitting device as light source.
For example, in the above-mentioned light-emitting device of above-mentioned patent documentation 3, by from light of wavelength change parts 2 etc., the tone of the light that decision is sent, under the situation of the lighting device of the light of the light (Wb) of light (Wc) that is applied to send the white color system of illustrative blackbody radiation track in the chromatic diagram of Figure 14 or bulb system, fluorescent material 33 content or fluorescent material 33 own need be cooperated individually with the color temperature that is predetermined and adjust, and make above-mentioned light-emitting device.
In addition, in the light-emitting device of above-mentioned patent documentation 4, in order to obtain white light, need to use the light-emitting device of the complementary colours relation of sending indigo plant, green and ruddiness, and regulate the light output of each light-emitting device.Therefore,, need carry out the control adjustment of the light output of each light-emitting device, so the problem that exists is: the maximization of lighting device integral body and the deviation that must adjust the light output of each light-emitting device in order to be used in lighting device.
For example, Figure 15 represents to make the example of manufacture method of the lighting device of the light-emitting device of using patent documentation 3.
In Figure 15 (a), the left side is arranged with the sectional view of the light-emitting device 4 ' that can send white light L1 in daytime, white light L2, warm white light L3 and bulb light L4 respectively to the right side from figure.Each light-emitting device 4 ' is roughly the same structure, possesses in the recess 3a of shell 3 as the led chip 1 of semiconductor light-emitting elements and wavelength conversion parts 2a ', 2b ', 2c ', the 2d ' that is sent yellow fluorescence by the blue light excitation of radiating from led chip 1.The wavelength conversion parts 2a ' of light-emitting device 4 ', 2b ', 2c ', 2d ' are for containing the variation of fluorescent material in translucent resin, the content of above-mentioned fluorescent material is different respectively.Light-emitting device 4 ' increases the content of the above-mentioned fluorescent material among wavelength conversion parts 2a ', 2b ', 2c ', the 2d ' along with from white light L1 side direction bulb coloured light L4 side in daytime.Thus, the light quantity to the blue light of the luminous led chip 1 in outside of light-emitting device 4 ' is absorbed by above-mentioned fluorescent material and reduces, and absorbs blue light and carry out the luminous increase of the sodium yellow behind the wavelength conversion by above-mentioned fluorescent material.Therefore, light-emitting device 4 ' can send the different light of color temperatures such as light of white in daytime, white, warm white and bulb look respectively.Therefore, to each (Figure 15 (b), (the c)) design of each lighting device 20 ' and the light-emitting device 4 of manufacturing lighting device 20 ' the needed color temperature.
Then, possessing the front view of lighting device 20 that luminescence unit 10a ', 10b ', 10c ', the 10d ' of 6 light-emitting devices 4 ' respectively have been installed in a surperficial 5a side of installation base plate 5 shown in Figure 15 (b).Luminescence unit 10a ', 10b ', 10c ', 10d ' will a plurality of light-emitting devices 4 ' of distinguishing be installed in by each color temperature on the surperficial 5a of installation base plate 5, can make different respectively 4 kinds of luminescence unit 10a ', 10b ', 10c ', 10d ' thus according to the light of bright device 20 ' needed each color temperature (daytime white light L1, white light L2, warm white light L3 and bulb coloured light L4).
Figure 15 (c) illustrates the lighting device 20 ' by each color temperature (daytime white, white, warm white and bulb look) is distinguished and 4 kinds of different luminescence unit 10a ', 10b ', 10c ', 10d ' are received to appliance body 22 inside respectively.
As mentioned above, when making the lighting device 20 ' send light such as white in daytime, white, warm white and bulb look respectively, make the light-emitting device 4 ' of light such as emitting daylight look, daytime white, white and warm white respectively.Therefore, send the light of different color temperatures in order to make lighting device 20 ', need from as the light-emitting device 4 ' of light source begin at all separately make.
Thereby lighting device 20 ' begins just need individually to develop, produce for the fabrication stage from light-emitting device 4 ' and in the mode of production of the equivalent rate variance of library management.In addition, light-emitting device 4 ' need make the white light intensity of Yellow luminous ratio in order to send the light of bulb colour system, and therefore the concentration that contains of above-mentioned fluorescent material becomes higher state, and also there is the tendency of step-down in light beam.
According to the manufacturing process of lighting device 20 ' shown in Figure 15 as can be known, lighting device 20 ' produces following problem: carry out other exploitation, production of various light-emitting devices 4 ' and in trouble such as library management according to different color temperatures, simultaneously in order to become the different lighting device 20 ' of color temperature, it is own to need to change lighting device 20 ', causes very large burden for the user.
Summary of the invention
The present invention makes in view of the above problems, and its purpose is to provide a kind of lighting device, can be by simpler OILS STRUCTURE DEPRESSION along with environment for use or change the aberration that produces in time, and can stably obtain the mixed light of the tone of wishing.
In addition, the object of the present invention is to provide a kind of luminescence unit and use the lighting device of this luminescence unit, can use common light-emitting device, the light ratio of the white color system that will send from light-emitting device is changed into the light of different correlated colour temperatures more simply, and productivity is higher.
The invention of technical scheme 1 is a kind of lighting device, the control device that possesses the different a plurality of light-emitting devices of illuminant colour and the light output ratio of a plurality of above-mentioned light-emitting devices is controlled, and make from the tone of the mixed light of the light of the different a plurality of above-mentioned light-emitting device radiation of illuminant colour variable, it is characterized in that, a plurality of above-mentioned light-emitting devices possess the light-emitting component and the first wavelength conversion portion respectively, and this first wavelength conversion portion absorbs from least a portion of the light of this light-emitting component radiation and the fluorescence after sending wavelength conversion; The above-mentioned light-emitting device of a part in a plurality of above-mentioned light-emitting devices has the second wavelength conversion portion, this second wavelength conversion portion will be from above-mentioned light-emitting component or the above-mentioned first wavelength conversion portion at least a portion of light of at least one side's radiation, wavelength conversion be the different illuminant colour of illuminant colour with the light that radiates from above-mentioned light-emitting component and the above-mentioned first wavelength conversion portion.
According to this invention, a plurality of light-emitting devices commonly possess light-emitting component respectively and absorb from least a portion of the light of this light-emitting component radiation and the first wavelength conversion portion of the fluorescence after sending wavelength conversion, and make the illuminant colour difference by the second wavelength conversion portion, the light that has thus respectively with roughly the same luminescent spectrum carries out luminous above-mentioned light-emitting component, with the above-mentioned first wavelength conversion portion, can reduce light from lighting device radiation because the drive current of above-mentioned light-emitting component with roughly the same wavelength conversion characteristic, temperature during use, the process of surrounding environment and time and produce the situation of aberration.
Especially, in lighting device, the basic structure of above-mentioned light-emitting device is common, can make the initial characteristics of luminescence of above-mentioned light-emitting component and degradation characteristic is identical in fact in time, therefore can suppress the aberration based on the above-mentioned light-emitting device of different illuminant colours.Therefore, the above-mentioned control device of lighting device can omit feedback control circuit portion, this feedback control circuit portion is in order stably to obtain the mixed light of the tone of hope, with the light of detections such as optical sensor, carry out from the FEEDBACK CONTROL of the light output of each above-mentioned light-emitting device radiation from the lighting device radiation.That is, lighting device can obtain the mixed light of the tone of hope by simpler Stability Analysis of Structures ground.
The invention of technical scheme 2 is characterised in that in technical scheme 1 described invention, the photodiffusion material that makes the light diffusion is contained in the second wavelength conversion portion.
According to this invention, photodiffusion material is contained in the above-mentioned second wavelength conversion portion that is arranged in the part of a plurality of above-mentioned light-emitting devices, therefore by adjusting the light diffusing of photodiffusion material, can make the light distribution characteristic of the light that radiates respectively from a plurality of above-mentioned light-emitting devices consistent in fact, can further improve from the colour mixture of the light of lighting device radiation.
The invention of technical scheme 3 is characterised in that in technical scheme 1 or 2 described inventions, the above-mentioned light-emitting device that does not have the above-mentioned second wavelength conversion portion in a plurality of above-mentioned light-emitting devices has the diffusion layer that makes from the light diffusion of the above-mentioned first wavelength conversion portion.
According to this invention, because the above-mentioned light-emitting device that does not have the above-mentioned second wavelength conversion portion in a plurality of above-mentioned light-emitting devices has the diffusion layer that makes from the light diffusion of the above-mentioned first wavelength conversion portion, therefore by adjusting the light diffusing of diffusion layer, can make the light distribution characteristic of the light that radiates respectively from a plurality of above-mentioned light-emitting devices consistent in fact, can further improve from the colour mixture of the light of lighting device radiation.
The invention of technical scheme 4 is characterised in that, in technical scheme 1 or 2 described inventions, the above-mentioned second wavelength conversion portion exists multiple to each above-mentioned light-emitting device, common two or more fluorophor is contained respectively in each second wavelength conversion portion, two or more above-mentioned fluorophor contain the ratio difference.
According to this invention, the above-mentioned second wavelength conversion portion exists multiple to each above-mentioned light-emitting device, each second wavelength conversion portion has common respectively two or more fluorophor, two or more above-mentioned fluorophor contain the ratio difference, thereby form the multiple above-mentioned second wavelength conversion portion with different respectively wavelength conversion characteristics.Therefore, the above-mentioned light-emitting device of lighting device only each fluorophor by regulating the multiple above-mentioned second wavelength conversion portion contain ratio, just can easily design from the color temperature of the light of the different colors of above-mentioned light-emitting device radiation.
The invention of technical scheme 5 is a kind of luminescence units, has: light-emitting device possesses semiconductor light-emitting elements and sends the light of white color system; And installation base plate, this light-emitting device is installed; It is characterized in that, be provided with wavelength conversion portion, this wavelength conversion portion cover at least the light that sends white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device.
According to this invention, form and send correlated colour temperature separately by the illuminating part that the above-mentioned light-emitting device that covers the light that sends white color system at least is set recently from the low light wavelength transformation component of light of the above-mentioned white color system of above-mentioned light-emitting device, can use common light-emitting device, the light ratio of the white color system that will send from above-mentioned light-emitting device is changed into the light of different correlated colour temperatures more simply, can become the higher luminescence unit of productivity.
That is, above-mentioned luminescence unit is based on the light from the white color system of above-mentioned light-emitting device radiation, and the above-mentioned wavelength conversion portion by forming separately can send the lower light of correlated colour temperature.
Therefore, even for example under the situation of the above-mentioned luminescence unit of only commonly having made the above-mentioned light-emitting device that possesses the light that sends white in daytime, above-mentioned luminescence unit also can send the light of white, warm white or bulb look effectively by the above-mentioned wavelength conversion of exchange portion.
Therefore, above-mentioned luminescence unit does not need the different above-mentioned light-emitting device of correlated colour temperature is individually developed, produced and in library management yet, the exploitation number in man-hour of the above-mentioned light-emitting device that correlated colour temperature is different can shorten, good in the simplification of library management, can productivity form well.
Especially, can will possess the above-mentioned luminescence unit of above-mentioned light-emitting device of light of the white color system sent as common element body, constitute the different above-mentioned luminescence unit of correlated colour temperature, tone and color rendering in the back operation when making above-mentioned luminescence unit, can provide productivity good above-mentioned luminescence unit.Promptly, do not need each above-mentioned luminescence unit to different tones yet, the different above-mentioned light-emitting device of correlated colour temperature, tone or color rendering is individually developed, produced and in library management, and the exploitation number in man-hour of above-mentioned light-emitting device shortens, good in the simplification of library management.In addition, above-mentioned light-emitting device is installed in the above-mentioned luminescence unit that forms on the above-mentioned installation base plate, does not also need other exploitation such as tone, color rendering, production and in library management etc., can reduce the quality deviation.
The invention of technical scheme 6 is characterised in that, in the invention of technical scheme 5, from the light of the above-mentioned white color system of above-mentioned light-emitting device in the scope of 4500k～7000k.
According to this invention, since from the light of the above-mentioned white color system of above-mentioned light-emitting device in the scope of 4500k～7000k, therefore for example by sending daylight look, daytime white or the light of white color system such as white from above-mentioned light-emitting device, can make above-mentioned luminescence unit emit the light of warm white or bulb look effectively by above-mentioned wavelength conversion portion.
The invention of technical scheme 7 is a kind of lighting devices, it is characterized in that, have: be provided with the appliance body of luminescence unit, this luminescence unit has the light-emitting device of the light that possesses semiconductor light-emitting elements and send white color system and the installation base plate that this light-emitting device forms is installed; And wavelength conversion portion, cover at least the light send white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device.
According to this invention, by having: be provided with the appliance body of luminescence unit, this luminescence unit has the light-emitting device of the light that possesses semiconductor light-emitting elements and send white color system and the installation base plate that this light-emitting device forms is installed; Translucent panel or bubble cap make at least a portion transmission from the light of above-mentioned luminescence unit; And wavelength conversion portion, cover at least the light send white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device; Can use common light-emitting device thus, the light ratio of the white color system that will send from above-mentioned light-emitting device is changed into the light of different correlated colour temperatures more simply, and can make the higher lighting device of productivity.
The invention of technical scheme 8 is characterised in that, in the invention of technical scheme 7, also possess translucent panel or the bubble cap of transmission, the coating part of above-mentioned wavelength conversion portion on the surface of above-mentioned translucent panel or above-mentioned bubble cap, being coated with from least a portion of the light of above-mentioned luminescence unit.
According to this invention, by above-mentioned translucent panel or above-mentioned bubble cap being possessed from the teeth outwards be coated with the coating part of above-mentioned wavelength conversion portion, can on the surface of above-mentioned translucent panel bigger or above-mentioned bubble cap, form above-mentioned wavelength conversion portion than the area of the above-mentioned illuminating part of above-mentioned light-emitting device.
Therefore, lighting device is by only being coated with the simpler structure of above-mentioned wavelength conversion portion, just can form the controlled above-mentioned preferably wavelength conversion portion of tone.In addition, with the simple structure of above-mentioned translucent panel or above-mentioned bubble cap exchange, lighting device can be changed into the light ratio of the white color system of irradiation more arbitrarily and freely the light of different correlated colour temperatures by only.
Especially, surface at above-mentioned translucent panel or above-mentioned bubble cap, outside above-mentioned light-emitting device, be provided with above-mentioned wavelength conversion portion separately, and leave from the above-mentioned illuminating part of above-mentioned light-emitting device, therefore along with the lighting a lamp of above-mentioned light-emitting device, be difficult to take place because from the heat of above-mentioned light-emitting device and the situation of the hot deterioration of above-mentioned wavelength conversion portion.In addition, because above-mentioned wavelength conversion portion is left from the above-mentioned illuminating part of above-mentioned light-emitting device, therefore can reduce the heating that causes by wavelength conversion.Therefore, compare, can become the higher lighting device of light beam with the structure of the above-mentioned wavelength conversion of formation portion on the above-mentioned illuminating part of above-mentioned light-emitting device.
In addition, the angle of emergence of the shape by adjusting above-mentioned bubble cap, the light that leaves distance and send from the above-mentioned illuminating part of above-mentioned light-emitting device from above-mentioned light-emitting device to above-mentioned bubble cap can send more uniform transmitted light from above-mentioned wavelength conversion portion.
The invention of technical scheme 9 is characterised in that, in technical scheme 7 described inventions, also possess translucent panel or the bubble cap of transmission from least a portion of the light of above-mentioned luminescence unit, above-mentioned wavelength conversion portion is set to slice part on the surface of above-mentioned translucent panel or above-mentioned bubble cap.
According to this invention, above-mentioned translucent panel or above-mentioned bubble cap are provided with the slice part of above-mentioned wavelength conversion portion from the teeth outwards, can form above-mentioned wavelength conversion portion thus on the surface of above-mentioned translucent panel bigger than the area of the above-mentioned illuminating part of above-mentioned light-emitting device or above-mentioned bubble cap.
Therefore, the simpler structure of the above-mentioned slice part of lighting device by above-mentioned wavelength conversion portion only is set just can form the controlled above-mentioned preferably wavelength conversion portion of tone.In addition, with the simple structure of above-mentioned translucent panel or above-mentioned bubble cap or the exchange of above-mentioned wavelength conversion portion, lighting device can change to the light ratio of the white color system of irradiation more arbitrarily and freely the light of different correlated colour temperatures by only.
Especially, on the surface of above-mentioned translucent panel or above-mentioned bubble cap, outside above-mentioned light-emitting device, be provided with above-mentioned wavelength conversion portion separately, and leave from the above-mentioned illuminating part of above-mentioned light-emitting device, therefore along with the lighting a lamp of above-mentioned light-emitting device, be difficult to take place because from the hot Laing of above-mentioned light-emitting device and the situation of the hot deterioration of above-mentioned wavelength conversion portion.In addition, because above-mentioned wavelength conversion portion is left from the above-mentioned illuminating part of above-mentioned light-emitting device, therefore can reduce the excitation heat of following wavelength conversion.Therefore, the structure that forms above-mentioned wavelength conversion portion with above-mentioned illuminating part at above-mentioned light-emitting device is compared, and can become the higher lighting device of light beam.
In addition, the angle of emergence of the shape by adjusting above-mentioned bubble cap, the light that leaves distance, sends from the above-mentioned illuminating part of above-mentioned light-emitting device from above-mentioned light-emitting device to above-mentioned bubble cap can send more uniform transmitted light from above-mentioned wavelength conversion portion.
The invention of technical scheme 10 is characterised in that, in technical scheme 8 described inventions, above-mentioned coating part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, and this removes at least one side that the position constitutes figure or decorative pattern.
According to this invention, above-mentioned coating part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, this removes at least one side that the position constitutes figure or decorative pattern, utilize the above-mentioned removal position of above-mentioned wavelength conversion portion thus, can obtain the luminous of figure arbitrarily or decorative pattern, can provide design good lighting device.
The invention of technical scheme 11 is characterised in that, in technical scheme 9 described inventions, above-mentioned slice part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, and this removes at least one side that the position constitutes figure or decorative pattern.
According to this invention, above-mentioned slice part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, this removes at least one side that the position constitutes figure or decorative pattern, utilize the above-mentioned removal position of above-mentioned wavelength conversion portion thus, can obtain the luminous of figure arbitrarily or decorative pattern, can provide design good lighting device.
The invention of technical scheme 12 is characterised in that, in technical scheme 9 described inventions, above-mentioned translucent panel or above-mentioned bubble cap possess fluorescence part from the teeth outwards, this fluorescence part is by from the color harmony of the light of the above-mentioned wavelength conversion portion light from above-mentioned light-emitting device, send the fluorescence of the tone different with this light, this fluorescence part constitutes at least one side of figure or decorative pattern.
According to this invention, above-mentioned translucent panel or above-mentioned bubble cap possess fluorescence part on the surface, this fluorescence part is by from the color harmony of the light of the above-mentioned wavelength conversion portion light from above-mentioned light-emitting device, send the fluorescence of the tone different with this light, this fluorescence part constitutes at least one side of figure or decorative pattern, above-mentioned thus fluorescence part can obtain figure or decorative pattern arbitrarily, can provide design good lighting device.
In addition, above-mentioned bubble cap can obtain figure or decorative pattern arbitrarily by making above-mentioned fluorescence part excitation luminescence.
The effect of invention:
In the invention of technical scheme 1, the first wavelength conversion portion of the fluorescence after a plurality of light-emitting devices possess light-emitting device respectively and will absorb and send wavelength conversion from least a portion of the light of this light-emitting device radiation, the above-mentioned light-emitting device of a part in a plurality of above-mentioned light-emitting devices has the second wavelength conversion portion, this second wavelength conversion portion will be from least a portion of the light of at least one side radiation of above-mentioned light-emitting component or the above-mentioned first wavelength conversion portion, wavelength conversion is and the different illuminant colour of illuminant colour from the light of above-mentioned light-emitting component and above-mentioned first wavelength conversion portion radiation, has following remarkable result thus: can provide a kind of lighting device, suppress to follow environment for use or time dependent aberration by simpler structure, can stably obtain the mixed light of the tone of wishing.
In the invention of technical scheme 5, has wavelength conversion portion, this wavelength conversion portion covers the illuminating part of light-emitting device at least and forms separately, and send the correlated colour temperature low light of correlated colour temperature than the blackbody radiation of the light of the white color system of sending from the above-mentioned illuminating part of above-mentioned light-emitting device, has following remarkable result thus: change into the light of different correlated colour temperatures more simply by the light ratio of the white color system that will send from above-mentioned light-emitting device, can provide productivity higher luminescence unit.
In addition, in the invention of technical scheme 7, have: be provided with the appliance body of luminescence unit, this luminescence unit has the light-emitting device of the light that possesses semiconductor light-emitting elements and send white color system and the installation base plate that this light-emitting device forms is installed; And wavelength conversion portion, at least cover the light send white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device, has following remarkable result thus: by using common light-emitting device, and the light ratio of the white color system that will send from above-mentioned light-emitting device changes into the light of different correlated colour temperatures more simply, thereby can provide productivity higher lighting device.
Description of drawings
Fig. 1 represents the lighting device of embodiment 1, (a) is approximate three-dimensional map, (b) is summary sectional view, (c) is the principle key diagram.
Fig. 2 is the summary sectional view of other the same lighting devices of expression.
Fig. 3 represents the lighting device of embodiment 2, (a) is approximate three-dimensional map, (b) is summary sectional view, (c) is the principle key diagram.
Fig. 4 is the summary sectional view of other the same lighting devices of expression.
Fig. 5 is the summary sectional view of the lighting device of expression embodiment 3.
Fig. 6 represents the luminescence unit of embodiment 5, (a) is front view, (b) is the schematic section along the A-A observation of (a).
Fig. 7 is the key diagram that the manufacturing process of the lighting device that has used the same luminescence unit is described.
Fig. 8 is the key diagram of manufacturing process of the lighting device of explanation embodiment 6.
Fig. 9 represents the lighting device of embodiment 7, and (a) expression is as the schematic section of lighting device on basis, (b) is the schematic section of lighting device of the light of the radiation correlated colour temperature different with (a).
Figure 10 represents the front view of the same lighting device.
Figure 11 is the key diagram of explanation conventional illuminating device.
Figure 12 is a summary construction diagram of representing other lighting devices in the past.
Figure 13 represents light-emitting device in the past, (a) is the sectional view of light-emitting device, (b) is the sectional view of other light-emitting devices.
Figure 14 be for reference to and the key diagram of the light that the explanation light-emitting device that illustrates is sent.
Figure 15 represents to be used for the manufacturing process with the application's lighting device relatively.
The explanation of symbol:
1LED chip (light-emitting component)
2 first wavelength conversion portions
3 shells
4r, 4g, 4b, 4b ', the 4y second wavelength conversion portion
9 diffusion layers
10r, 10g, 10b, 10y light-emitting device
The 4aa illuminating part
5 installation base plates
6 wavelength conversion portions
10 luminescence units
12 remove the position
20 lighting devices
21 bubble caps
22 appliance bodies
23 coating parts
The specific embodiment
(embodiment 1)
Below, the lighting device of present embodiment is described according to Fig. 1 and Fig. 2.In addition, in Fig. 1 and Fig. 2, give identical sequence number, and omit repeat specification for identical parts.
Lighting device 20 shown in Fig. 1 (a) and (b) of present embodiment, mixed light for the tone that radiates hope, possess multiple (being two kinds in the present embodiment) light-emitting device 10b, 10y, this multiple light-emitting device 10b, 10y are emitted in (the Commission International del ' Eclairage of the CIE shown in Fig. 1 (c); Represent in the xy chromatic diagram of XYZ color specification system International Commission on Illumination) at the different chroma point Wb that on the line segment of black body locus BL, stipulates, the illuminant colour of Wy.In addition, in the xy chromatic diagram of Fig. 1 (c), also illustration a series of isochrome temperature line of using the line segment that intersects respectively with black body locus BL to represent.
In the lighting device 20 of present embodiment, light-emitting device 10b is emitted in the white light of the blueness system that represents with the higher chroma point Wb of color temperature in the xy chromatic diagram, and light-emitting device 10y is emitted in the white light of the yellow system that represents with the lower chroma point Wy of color temperature in the xy chromatic diagram.
Lighting device 20 is by the light output ratio of control device (not shown) control light-emitting device 10b and light-emitting device 10y, can radiate the mixed light (being white light) of the tone on the chroma point Wb of the light of light-emitting device 10b radiation and the dashdotted line segment that chroma point Wy from the light of light-emitting device 10y radiation is connected that will become the complementary colours relation thus here.
More specifically, in the lighting device 20 shown in Fig. 1 of present embodiment (a), two light-emitting device 10b and two light-emitting device 10y that send the white light of yellow system that send the white light of blue system, be installed in respectively on the surface of circuit substrate 11, this circuit substrate 11 has the wiring pattern of conduct to the supply path of each light-emitting device 10b, 10y.Circuit substrate 11 for example is the circular flat metallic substrates substrate that is formed with the wiring pattern of electroplating with Au.Each outer electrode (not shown) of each light-emitting device 10b, 10y respectively by electroconductive component (not shown) (for example AuSn or Ag thickener etc.), is connected electrically on the pad 12 of a pair of wiring pattern of circuit substrate 11.In addition, the loop substrate 11 of the lighting device 20 of present embodiment forms discoideus, but is not limited to discoideusly, and it is polygonal tabular for example also can to form oval tabular or rectangular plate shape etc.
Each light-emitting device 10b, 10y of lighting device 20 for example use the shell 3 that is made of alumina ceramic material, and this shell 3 has common profile, and are formed with recess to inner recess, form pair of conductors pattern (not shown) on the inner bottom surface of this recess.On the inner bottom surface of the above-mentioned recess of the shell 3 of light-emitting device 10b, 10y, led chip 1 is installed.
Led chip 1 is, the luminescent layer that stack gradually the gallium nitride compound semiconductor layer of n type on sapphire substrate, is made of the gallium nitride compound semiconductor that contains In and the gallium nitride compound semiconductor layer of p type.In addition, led chip 1 is, the part of the gallium nitride compound semiconductor layer of above-mentioned luminescent layer and above-mentioned p type is removed, and expose the part of each gallium nitride compound semiconductor layer of said n type, and be respectively equipped with anode electrode and the cathode electrode that is electrically connected with each gallium nitride compound semiconductor layer of p type and n type in same planar side.Led chip 1 utilizes the Au salient point to install by flip-chip, will be arranged on the above-mentioned anode electrode and the above-mentioned cathode electrode of the same planar side of led chip 1, can be installed on the pair of conductors pattern that forms on the shell 3 of light-emitting device 10b, 10y with powering.
The led chip 1 that is installed in light-emitting device 10b, 10y on the circuit substrate 11 is common respectively, and, radiate for example blue light in the scope of 450nm～470nm (for example chroma point B in the xy chromatic diagram of Fig. 1 (c)) of peak wavelength respectively by luminous based on what switch on.In addition, on the inner bottom surface mounted LEDs chip 1 of the above-mentioned recess of the shell 3 of each light-emitting device 10b, 10y, be provided with the first wavelength conversion portion 2 in the mode that covers led chip 1.The first wavelength conversion portion 2 is common respectively, be to absorb the yellow fluorophor that sends yellow fluorescence from the blue light of led chip 1 (for example (Sr, Ba) 2SiO4 that activates by Eu or the Y3Al5O12 that activates by Ce etc.), be dispersed in the silicone resin as adhesive, be coated on the led chip 1 and make its sclerosis.
Second 4b of wavelength conversion portion, 4y, be to absorb the yellow fluorophor that sends sodium yellow from the light of led chip 1 (for example (Sr, Ba) 2SiO4 that activates by Eu or the Y3Al5O12 that activates by Ce etc.), be dispersed in the silicone resin as adhesive, form membranaceous.In addition, the kind of the above-mentioned fluorophor of second 4b of wavelength conversion portion, 4y is common, but contains the ratio difference in the adhesive.
By second 4b of wavelength conversion portion, 4y being embedded in the above-mentioned recess that is fixed on each light-emitting device 10b, 10y, thus from led chip 1 radiation and transmission the part of blue light of the first wavelength conversion portion 2, by second 4b of wavelength conversion portion, 4y is the ratio difference of sodium yellow by wavelength conversion, light-emitting device 10b can send the white light of blue system, and light-emitting device 20y can send the white light of yellow system.
Lighting device 20 is controlled the light output ratio of each light-emitting device 10b, 10y by control device (not shown), can radiate the mixed light from the tone of the hope of lighting device 20 thus with controlling.
In addition, lighting device 20 is in order to adjust from the color temperature of the light of lighting device 20 radiation, as long as illuminant colour different light-emitting device 10b, 10y are arranged.Therefore, structure as the light-emitting device 10b that sends the blue light that becomes the short-and-medium wavelength side of visible light, other lighting devices 20 of present embodiment that also can be as shown in Figure 2 are such, become following formation: light-emitting device 10b and light-emitting device 10y use common led chip 1 and the first common wavelength conversion portion 2 on the inner bottom surface of the above-mentioned recess of common shell 3, but do not use second 4b of wavelength conversion portion in light-emitting device 10b.
For example, in lighting device shown in Figure 2 20, each light-emitting device 10b, 10y are constituted respectively, possess: led chip 1 can be 420nm radiation blue-violet light with the peak wavelength; Shell 3 is made of ceramic material, led chip 1 is installed on the inner bottom surface of recess; And the first wavelength conversion portion 2, covering is installed in the led chip 1 on the inner bottom surface of above-mentioned recess of shell 3, form by the translucent material (for example glass, silicone resin etc.) that contains blue emitting phophor (for example La3Si8N11O4 that activates by Ce or LaAl (Si6-zAlz) N10-zOz that activates by Ce etc.), this blue emitting phophor can absorb the blue-violet light of led chip 1 radiation and carry out wavelength conversion, and sends blue-fluorescence.
In addition, for white light from the blue system of light-emitting device 10b radiation, the luminescent spectrum broad of preferred fluorophor, in the first wavelength conversion portion 2, except the above-mentioned blue emitting phophor that can send blue-fluorescence, also can contain the yellow fluorophor that can send yellow fluorescence (for example (Sr, Ba) 2SiO4 that activates by Eu or the Y3Al5O12 that activates by Ce etc.).
Here, light-emitting device 10y is and the essentially identical structure of light-emitting device 10b, be provided with second 4y of wavelength conversion portion in light emission face side separately via air layer 5, second 4y of wavelength conversion portion contains by the yellow fluorophor that sends sodium yellow from least one light stimulus of the blue light of the led chip 1 that sends blue-violet light and 2 radiation of the first wavelength conversion portion (for example (Sr, Ba) 2SiO4 that is activated by Eu or the Y3Al5O12 that activated by Ce etc.).In addition, in light-emitting device 10b, the 10y of present embodiment, use ceramic material to form as the material of shell 3, but be not limited to ceramic material.
In the lighting device shown in Figure 2 20 of present embodiment,, use the led chip 1 of same size (semi-conducting material of luminescent layer, emission wavelength and structure are roughly the same) as each led chip 1.
In the lighting device 20 of the present embodiment of above explanation, the tone from the mixed light of lighting device 20 radiation can be set at the mode of the chroma point on the line segment that two chroma point Wb, Wy in the black body locus BL of the xy chromatic diagram shown in Fig. 1 (c) regulation are connected, formation is sent two kinds of light-emitting device 10b, 10y of the illuminant colour of each chroma point Wb, Wy.
Therefore, light-emitting device 20 can suppress along with the drive current of hepatic led chip 1, environment for use and change in time and the aberration from the light of light-emitting device 10b, 10y radiation that produces, is the higher device of reliability.And, lighting device 20 is under the situation of the tone change that makes the mixed light that radiates from lighting device 20, even do not possess the control device of the simple structure of feedback control circuit portion, by only changing, also can stably obtain the mixed light of the tone of wishing from the light output ratio of light-emitting device 10b, 10y radiation.
In addition, when making the lighting device 20 of present embodiment, following formation gets final product: in all light-emitting device 10b, 10y, preparation possesses a plurality of light-emitting device 10b of hepatic led chip 1, the first wavelength conversion portion 2 and the shell 3 of same size, and only on a part of light-emitting device 10b, cover second 4y of wavelength conversion portion separately as the light-emitting device 10y that sends the yellow white light that is.Therefore, the manufacturing of each light-emitting device 10b, 10y becomes easily, and the fabrication yield of lighting device 20 is higher, can easily make the lighting device 20 of the generation that can suppress aberration.
Control by the drive current that the led chip 1 of control device subtend light-emitting device 10b, 10y is supplied with, and, can control tone from the mixed light of lighting device 20 radiation thus by control from the power of the light output of each light-emitting device 10 radiation.In the lighting device 20 of present embodiment, even do not possess the above-mentioned control device of feedback control circuit portion, also can suppress along with environment for use or change in time and the aberration that produces, and stably obtain the mixed light of the tone of wishing.
In addition, when the led chip 1 as light-emitting component will make light output improve, the luminescent spectrum of led chip 1 was compared with the luminescent spectrum of the light that radiates from fluorophor, has the tendency of the light that sends sharp-pointed and narrower wavelength.In addition, the heating of the increase of led chip 1 by following drive current etc., not only light output descends, and luminescent spectrum is shifted to long wavelength side sometimes.
Therefore, not only the light wavelength from led chip 1 radiation changes, and produce from the luminescent spectrum of the light of led chip 1 radiation with absorb from deviation between the exiting spectrum of the fluorophor of the light of led chip 1, therefore sometimes because the variation of the launching efficiency of fluorophor also produces the variation of exporting from the light of fluorophor radiation etc.
But, in light-emitting device 10b, the 10y of Fig. 2 of present embodiment, led chip 1 is combined as basic structure with the first wavelength conversion portion 2 that possesses fluorophor, compare with the luminescent spectrum of led chip 1 from the luminescent spectrum of the light of the first wavelength conversion portion 2 radiation, can have wideer spectral width, therefore can suppress the variation of the light output of second 4y of wavelength conversion portion, and can also suppress from the tone variations of the light of light-emitting device 10b, 10y radiation.
Below, lighting device 20 employed each structure of detailed description present embodiment.
The lighting device 20 employed light-emitting components of present embodiment 1 can send light by energising.The light of light-emitting component radiation, for example can be made as peak wavelength is blue-violet light or the blue light of 405nm to 490nm, but not only is defined in blue-violet light or blue light, also can use ultraviolet ray to wait other wavelength.Led chip 1 as light-emitting component, can enumerate following chip: for example on crystal growth substrates such as sapphire substrate, spinelle substrate, gallium nitride base board, zinc oxide substrate or silicon carbide substrate, stack gradually the gallium nitride compound semiconductor layer, the gallium nitride compound layer that contains indium, the gallium nitride compound semiconductor layer of p type of n type as the luminescent layer of multiple quantum trap structure or single quantum well structure.
In addition, used the led chip 1 of insulating properties substrate as the crystal growth substrate, by expose the part of the gallium nitride compound semiconductor layer of said n type from the gallium nitride based semiconductor layer side of above-mentioned p type, can form anode electrode and cathode electrode respectively in same planar side.In addition, used the led chip 1 of conductive board, formed anode electrode or cathode electrode gets final product in the two sides of the thickness direction of led chip 1 side.
Be arranged on above-mentioned anode electrode and above-mentioned cathode electrode on the led chip 1,, then do not limit so long as stacked film of Ni film and Au film, Al film, ITO film etc., can access the material with the good Ohmic characteristic of gallium nitride compound semiconductor layer etc.
Be provided with the led chip 1 of above-mentioned anode electrode and above-mentioned cathode electrode with the one side side, can utilizing metal salient point such as Au salient point and flip-chip is installed on the pair of conductive pattern on the inner bottom surface of recess of the shell 3 that is formed on light-emitting device 10b, 10y.In addition, formed under the situation of led chip 1 of above-mentioned anode electrode or above-mentioned cathode electrode using as led chip 1 in the two sides of thickness direction side, a conductive pattern in the pair of conductors pattern that will on the shell 3 of led chip 1 is installed, form, with the above-mentioned anode electrode or the above-mentioned cathode electrode of led chip 1, carry out the tube core welding via electroconductive component (for example AuSn or Ag thickener etc.) and wait and be electrically connected.In addition, the light of led chip 1 takes out another the above-mentioned cathode electrode or the above-mentioned anode electrode of face side, is electrically connected with another conductive pattern via wire (for example gold thread or aluminum steel etc.) to get final product.
In addition, in the lighting device 20 of present embodiment, on each light-emitting device 10b, 10y, be separately installed with a led chip 1, but the quantity of each led chip 1 is not limited to one, also can uses a plurality of respectively.In this case, using suitable series, parallel of conductive pattern or connection in series-parallel ground to be electrically connected each led chip 1 gets final product.In addition, led chip 1 also can use chip of the same race, also can use a plurality of led chips 1 that send different emission wavelengths.
Lighting device 20 is for the light that makes radiation is white light, and preferably making from the light of different light-emitting device 10b, the 10y radiation of illuminant colour is the complementary colours relation.For example, lighting device 20 uses light-emitting device 10b that sends blue light and the light-emitting device 10y that sends sodium yellow.Therefore, light-emitting device 10b, 10y are, compare, radiate more led chip 1 by the shortest blue light of main light emission wavelength that uses among light-emitting device 10b, the 10y different the light of emitting from light-emitting device 10b, 10y respectively, can make the first wavelength conversion portion 2 and second 4b of wavelength conversion portion, 4y luminous effectively by the light of short wavelength side (for example bluish violet) with illuminant colour.
Then,, utilize the above-mentioned pair of conductors pattern (for example the most surperficial quilt has been electroplated the conductive pattern of Au) on the inner bottom surface of recess of shell 3, can constitute the electrical path of led chip 1 as long as shell 3 can be installed the led chip 1 as light-emitting component respectively.The shell 3 of such light-emitting device 10b, 10y can use the ceramic substrate that has adopted aluminium oxide or aluminium nitride etc., the metallic substrates substrate that has adopted metal materials such as Cu, Al or Fe or epoxy resin base plate to wait and form.In addition, shell 3 also can be for example by resin formings such as allyl resin or epoxy resin a pair of semiconductor pattern.
In addition, on light-emitting device 10b, 10y, also can make conductive pattern be set to the side and the back side of shell 3, and constitute the outer electrode of light-emitting device 10b, 10y from the inner bottom surface extension of the recess of shell 3.Such light-emitting device 10b, the outer electrode of 10y can easily be electrically connected with circuit substrate 11 by reflow process etc.
The circuit substrate 11 of the lighting device 20 of present embodiment can be installed a plurality of light-emitting device 10b, 10y and light-emitting device 10b, 10y are switched on.The circuit substrate 11 of the lighting device 20 of present embodiment forms circular tabular, but also can possess the reflector (reflector) of the light reflection that makes selfluminous device 10b, 10y in the perimembranous on the above-mentioned surface of circuit substrate 11.In addition, lighting device 20 to the direction radiation of hope, also can be provided with distribution controls portions (not shown) such as reflecting plate, diffuser plate or lens for the light colour mixture that makes selfluminous device 10b, 10y separately on light-emitting device 10b, 10y.
In addition, lighting device 20 also can be provided with reflectance coating (not shown) on circuit substrate 11, this reflectance coating can reflect effectively from the light of light-emitting device 10b, 10y radiation, particularly, the glass that uses metal materials such as containing Al, Al alloy, Ag, Ag or BaSO4 etc. to become the inorganic material of Chinese white constitutes and gets final product.
The employed first wavelength conversion portion 2 of present embodiment is, at least a portion as the light of led chip 1 radiation of light-emitting component is absorbed and carries out wavelength conversion, sends the fluorescence that recently more becomes the main light emission wavelength from the light of led chip 1 by long wavelength side.
The first wavelength conversion portion 2, for example containing fluorophor in translucent materials such as silicone resin, allyl resin, epoxy resin or glass forms and gets final product, this fluorophor absorbs the part from the light of led chip 1 radiation, and radiation becomes the fluorescence of main light emission wavelength at long wavelength side more.
In addition, second 4b of wavelength conversion portion, 4y contain fluorophor, this fluorophor is to absorbing from the light of led chip 1 radiation or from the part of the fluorescence of the first wavelength conversion portion, 2 radiation, and radiation becomes the fluorescence of main light emission wavelength at long wavelength side more, and second 4b of wavelength conversion portion, 4y radiation wavelength ratio is from the longer light of main light emission wavelength of the light of the first wavelength conversion portion, 2 radiation.Second 4b of wavelength conversion portion, 4y also can be same with the first wavelength conversion portion 2, for example contain fluorophor in translucent materials such as silicone resin, allyl resin, epoxy resin or glass.
For the mixed light that makes lighting device 20 radiation becomes the higher white light of color rendering, light-emitting device 10b, 10y are in the combination of the led chip 1 that radiates blue light and the first wavelength conversion portion 2 and second 4b of wavelength conversion portion, 4y, fluorophor as the first wavelength conversion portion, 2 usefulness can use yellow fluorophor, and the fluorophor of using as second 4b of wavelength conversion portion, 4y can use green-emitting phosphor and red-emitting phosphors.
Lighting device 20 has used at light-emitting device 10b, 10y under the situation of light-emitting device of the light that can send two different looks or three looks, chroma when having changed color in order to make becomes greatly as far as possible, preferably becomes with respect to the scope of wanting to change color, the light-emitting device 10b that sends the light of the chroma point that separates as far as possible, the structure of 10y.On the other hand, with respect to the scope of wanting to change color, send as far as possible in the structure of light-emitting device 10b, 10y of light of the chroma point that separates, it is big that aberration becomes, be used to be controlled to be the control accuracy step-down of mixed light of the tone of hope, consider importantly that therefore the both sides of the aberration of the tone of obtainable mixed light and illuminant colour suitably set.
As the fluorophor that in the first wavelength conversion portion 2 and second 4b of wavelength conversion portion, 4y, uses, for example the fluorophor of the aluminate class such as Tb3Al5O12 that activate except the Y3Al5O12 that activates by Ce or by Ce, the fluorophor of the silicates such as (Sr, Ba) 2SiO4 that can also adopt the Ba2SiO4 that activates by Eu or activate by Eu, the CaAlSiN3 that activates by Eu, the Sr2Si5N8 that activates by Eu, the Ca2Si5N8 that activates by Eu, the SrSi7N10 that activates by Eu or the nitride-based fluorophor such as CaSi7N10 that activate by Eu.
For example, as the green-emitting phosphor that sends green light, can enumerate the Ca3Sc2Si3O12 that activates by Ce, by the CaSc2O4 of Ce activation or the (Sr that activates by Eu, Ba, Ca) SiO4 etc., as the yellow fluorophor that sends sodium yellow, can enumerate the Y3Al5O12 that activates by Ce, aluminic acid fluorophor such as Tb3Al5O12 by the Ce activation, or (the Sr that activates by Eu, Ba) 2SiO4 etc., as red-emitting phosphors, can enumerate CaAlSiN3 that activates by Eu or the (Sr that activates by Eu, Ca, Mg) AlSiN3, (Sr by the Ce activation, Ca, Mg) AlSiN3, (Sr by the Ce activation, Ca) nitride phosphor such as 2Si5N8.
In addition; in the light-emitting device 10b of the lighting device shown in Figure 2 20 of present embodiment; in the shell 3 of having taken in the led chip 1 and the first wavelength conversion portion 2, any parts are not set; but with the protection led chip 1 and the first wavelength conversion portion 2 is purpose, also the sealing that is made of transparent member can be set separately.
In addition, the control device of the lighting device 20 of present embodiment possesses control device (not shown), and this control device can individually be controlled two kinds of light-emitting device 10b, 10y light output separately by the power supply supply capability.Here, control device for example constitutes, and possesses: storage part, storage make exports the table that is mapped to the color temperature when the color temperature of the light of lighting device 20 radiation is adjusted with the light of light-emitting device 10b, the 10y of each illuminant colour; Each lamp circuit portion lights a lamp each light-emitting device 10b, 10y respectively; And current control circuit portion, control is to the current value of the drive current of each lamp circuit portion supply; This control device basis and the corresponding toning signal of the color temperature of setting by the operation of color temperature configuration part (not shown) are controlled the light output of light-emitting device 10b, 10y.
Promptly, lighting device 20 is measured color temperature and the relation between the current value of the drive current of each light-emitting device 10b, 10y in advance, and the table that storage is mapped the light output ratio of color temperature and each light-emitting device 10b, 10y in the storage part of the microcomputer that constitutes above-mentioned current control circuit portion, so that from the color temperature of the mixed light of lighting device 20 radiation, can shown in the xy chromatic diagram of Fig. 1 (c), on the line segment that above-mentioned chroma point Wb, Wy are connected of black body locus BL, change.
Therefore, if lighting device 20 is according to the color temperature of setting by the operation of above-mentioned color temperature configuration part, change is controlled light output ratio to the current value of the drive current of each light-emitting device 10b, 10y, then can adjust on black body locus BL from the color temperature of the mixed light of lighting device 20 radiation.
In addition, in the relation of color temperature and illumination, in general, even identical illumination also has the dark more tendency of the low more lightness sense of then feeling of color temperature (people sees the impression of the lightness when illuminated room is whole).Therefore, the control device of lighting device 20, if it is low more then illumination is high more that the light output ratio of each light-emitting device 10b, 10y is controlled to be the color temperature of the mixed light that is shone, then lighting device 20 can make the tone variations of the mixed light that is radiated when visuognosis person being given roughly certain lightness sense.
(embodiment 2)
Not not being all of the lighting device 20 of the present embodiment shown in Fig. 3 (a) and (b), replace using in the lighting device 20 of embodiment 1 shown in Figure 1 the situation of two kinds of light-emitting device 10b, 10y, and use three chroma point Wr, Wg, three kinds of light-emitting device 10r, 10g of Wb, the 10b that sends on the xy chromatic diagram shown in Fig. 3 (c).In addition, give identical symbol and suitably omit explanation for the structural element identical with embodiment 1.
The lighting device 20 of present embodiment constitutes, and by the addition colour mixture to having carried out control from the light output ratio of the light of illuminant colour different three kinds of light-emitting device 10r, 10g, 10b radiation, obtains the mixed light of the tone of wishing thus.
Particularly, the light-emitting device 10b of the lighting device 20 of present embodiment is, possess the radiation blue light led chip 1, the part from the blue light of led chip 1 is absorbed and the first wavelength conversion portion 2 and the second wavelength conversion portion 4 that send the yellow fluorescence behind the wavelength conversion and the white light of the blue system of radiation.Light-emitting device 10g is, possess the radiation blue light led chip 1, the part from the blue light of led chip 1 is absorbed and sends the first wavelength conversion portion 2 of the yellow fluorescence behind the wavelength conversion and the part from the blue light of blue led chip 1 is absorbed and the second wavelength conversion portion 4 that sends the green fluorescence behind the wavelength conversion, and the white light of the green system of radiation.In addition, light-emitting device 10r is, possess the radiation blue light led chip 1, the part from the blue light of led chip 1 is absorbed and sends the first wavelength conversion portion 2 of the yellow fluorescence behind the wavelength conversion and the part from the blue light of led chip 1 is absorbed and the second wavelength conversion portion 4 that sends the red fluorescence behind the wavelength conversion, and the white light of radiation Yellow Red.
Here, light-emitting device 10r, 10g, 10b possess the blue led chip 1 of radiation blue light respectively and the part from the blue light of led chip 1 are absorbed and the first wavelength conversion portion 2 that sends the fluorescence behind the wavelength conversion, according to different illuminant colours make up second 4r of wavelength conversion portion, 4g, 4b obtain the luminous of three looks.
That is, each light-emitting device 10r, 10g, 10b constitute as basic structure, on the inner bottom surface of the recess of distinguishing common shell 3, have the common respectively led chip that sends blue light 1, and cover each led chip 1 with the first common respectively wavelength conversion portion 2.
In addition, structure as each light-emitting device 10b, also can replace in the recess of the shell 3 of light-emitting device 10r, the 10g shown in Fig. 3 (b), 10b, the situation of each second 4r of wavelength conversion portion, 4g, 4b is set via the first wavelength conversion portion 2 and air layer 5, and the lighting device 20 shown in Fig. 4 (a) is such, flat each second 4r of wavelength conversion portion, 4g, 4b are formed on the above-mentioned recess of each shell 3, and the first wavelength conversion portion 2 that makes second 4r of wavelength conversion portion, 4g, 4b and covered led chip 1 is via air layer 5 arranged opposite.
In addition, lighting device 20 that also can be shown in Fig. 4 (b) is such, only send the light-emitting device 10b of the white light of blue system among light-emitting device 10r, 10g, the 10b, do not use second 4b of wavelength conversion portion, and form by the shell 3 that has used the led chip 1 and the first wavelength conversion portion 2.
In addition, each light-emitting device 10r, 10g of lighting device 20,10b also can be shown in Fig. 4 (c) like that, possesses the sealing 7 that forms by hemispheric translucent material (for example silicone resin etc.) in the inboard of second 4r of wavelength conversion portion, 4g, 4b, sealing portion 7 is with led chip 1 and 2 sealings of the first wavelength conversion portion, and and shell 3 between shape configuration to surround, formation air layer 5 between the light emergence face of the inner face of second 4r of wavelength conversion portion, 4g, 4b and each sealing 7.Such light-emitting device 10r, 10g, 10b can suppress light and transmit to each sealing 7 side from each second 4r of wavelength conversion portion, 4g, 4b, and the light that can improve to the outside takes out efficient.
And, light-emitting device 10r, the 10g of lighting device 20,10b also can be shown in Fig. 4 (d) like that, the shell 3 that has disposed the led chip 1 and the same size of the first wavelength conversion portion 2 that covers led chip 1 is utilized as basic structure, this shell 3 is configured in 8 inside, incorporating section, and this incorporating section 8 possesses second 4r of wavelength conversion portion, 4g, the 4b that sends different illuminant colours separately in the light emergence face side.
Like this, light-emitting device 10r, 10g, the 10b of the lighting device 20 of present embodiment, all on the inner bottom surface of shell 3, the first wavelength conversion portion 2 of led chip 1 and covering led chip 1 is utilized as the basic structure of same size, and second 4r of wavelength conversion portion, 4g, the 4b send different illuminant colours be set respectively, in the shell that becomes same size 3 with led chip 1 and first wavelength conversion portion 2, main heating takes place thus.
Such heating all commonly produces in light-emitting device 10r, the 10g of each illuminant colour, 10b, therefore mixed light from lighting device 20 radiation can be suppressed along with environment for use or change in time and the aberration that produces, the mixed light of the tone of wishing can be stably obtained.
In addition, light-emitting device 10r, the 10g of lighting device 20,10b, with the led chip 1 on the inner bottom surface of the above-mentioned recess of second 4r of wavelength conversion portion, 4g, 4b and shell 3 and cover the first wavelength conversion portion 2 of led chip 1, for example via air layer 5 arranged opposite, its thermal release ground is constituted, second 4r of wavelength conversion portion that produces, the aberration among 4g, the 4b can be further suppressed along with the heating of led chip 1 thus, reliability can be improved.
And then, in the lighting device 20 of present embodiment, in the xy chromatic diagram of Fig. 3 (c), to be made as chroma point Wr, Wg, Wb respectively from the light of illuminant colour different light-emitting device 10r, 10g, 10b radiation, and establish from lighting device 20 and can radiate mixed light in the illustrated scope of the triangle of representing by chain-dotted line, but be not limited to above-mentioned triangle from the chroma point of light on the xy chromatic diagram of radiation such as each light-emitting device 10r, 10g of constituting lighting device 20,10b, for example also can be to use the polygons such as pentagon of five kinds of different light-emitting devices of illuminant colour.
In addition, the lighting device 20 of present embodiment also can with by the diffusion panel that forms of diffusion translucent material disposing with circuit substrate 11 opposed modes, improve the colour mixture of the light that radiates from each light-emitting device 10r, 10g, 10b by above-mentioned diffusion panel.
In addition, also can replace each light-emitting device 10r, 10g, 10b are installed on the circuit substrate 11, and for example in lighting device 20, carry on the substrate parts of appliance body that the material higher by heat conductivity (metal etc.) constitutes etc., will be formed with the circuit substrate 11 and substrate parts arranged opposite that make a plurality of fenestras that each light-emitting device 10r, 10g, separately part or all of 10b expose.
(embodiment 3)
Not not being all of present embodiment, the situation of the light-emitting device 10b that the second wavelength conversion 4b is not set that replacement is used in the lighting device 20 of the embodiment 2 shown in Fig. 4 (b) is provided with the light-emitting device 10b that makes from the diffusion layer 9 of the light diffusion of the first wavelength conversion portion 2 or led chip 1 radiation as shown in Figure 5 and use.In addition, give identical symbol for the structural element identical and suitably omit explanation with embodiment 2.
In the lighting device 20 of Fig. 4 (b), among light-emitting device 10r, 10g, the 10b only light-emitting device 10b the second wavelength conversion portion is not set.Therefore, from the characteristics of luminescence of the light of each light-emitting device 10r, 10g of lighting device 20,10b radiation, in transmission second 4r of wavelength conversion portion, 4g light and the second wavelength conversion portion is not set and different from the light of the first wavelength conversion portion, 2 radiation.
More specifically, light-emitting device 10r, 10g, the 10b of the lighting device 20 shown in Fig. 4 of present embodiment (b) contain fluorophor as being arranged on second 4r of wavelength conversion portion, the 4g on the shell 3.Therefore, from light scattering etc. by the above-mentioned fluorophor of second 4r of wavelength conversion portion, 4g of each light-emitting device 10r, 10g radiation, light distribution characteristic is with different from the light of light-emitting device 10b radiation.
The result, distribution controls portion (not shown) by optical systems such as lens or speculums has carried out under the situation of distribution controls at the mixed light that radiates from lighting device 20, on the light distribution patterns of the plane of illumination of lighting device 20, the tendency that the difference that existence causes from the light distribution characteristic of the light of each light-emitting device 10r, 10g, 10b radiation is emphasized easily, irregular colour is even might be obviously.
Promptly, light-emitting device 10r, the 10g of lighting device 20,10b, at the light-emitting device 10r, the 10g that have used second 4r of wavelength conversion portion, 4g with do not use among the light-emitting device 10b of the second wavelength conversion portion, the diffusion difference of light is never used the scattering of light degree step-down of the light-emitting device 10b radiation of the second wavelength conversion portion.Therefore, in the lighting device 20 of the present embodiment shown in Fig. 5 (a), in the light-emitting device 10b that does not use the second wavelength conversion portion, replace second 4r of wavelength conversion portion, the 4g of other light-emitting devices 10r, 10g, and configuration contains the diffusion layer 9 of photodiffusion material.Diffusion layer 9 contain by adjustment photodiffusion material translucent material (for example silicone resin etc.) contain ratio, can make from the diffusion of the light of each light-emitting device 10r, 10g, 10b radiation even, can make from the light distribution characteristic unanimity of the mixed light of lighting device 20 radiation, can improve from the colour mixture of the light of lighting device 20 radiation.
Then, other lighting devices 20 as present embodiment, other lighting devices 20 of present embodiment shown in Fig. 5 (b), on the basis of the structure of the lighting device 20 of Fig. 5 (a), also in second 4g ' of wavelength conversion portion, be combined with photodiffusion material, so that can make from the light distribution characteristic of the light of second 4r of wavelength conversion portion, the 4g ' of light-emitting device 10r, 10g radiation consistent in fact.
More specifically, light-emitting device 10r, 10g, the 10b of the lighting device 20 shown in Fig. 5 of present embodiment (b), as second 4r of wavelength conversion portion, the 4g ' that are arranged on the shell 3, using the concentration that contains of fluorophor sometimes is different two kinds of 4r of wavelength conversion portion, 4g ' of all kinds.Therefore, in light-emitting device 10r, the 10g of lighting device 20,10b, the above-mentioned fluorophor by second 4r of wavelength conversion portion, 4g ' makes the degree difference of light scattering.
But, the lighting device 20 of the present embodiment shown in Fig. 5 (b), by containing photodiffusion material among second 4g ' of wavelength conversion portion that makes light-emitting device 10g, the cooperation by the photodiffusion material among second 4g ' of wavelength conversion portion makes from the light distribution characteristic unanimity of the light of light-emitting device 10r, 10g radiation thus.
In addition, the photodiffusion material (not shown) that second 4g ' of wavelength conversion portion is contained, and the refringence that contains between the translucent material (for example silicon etc.) of the adhesive of fluorophor of the conduct of second 4g ' of wavelength conversion portion big more, can make the degree of light scattering big more.Therefore, if from the light distribution characteristic of the light of second 4g ' of wavelength conversion portion radiation is the diffusion of roughly the same light, then use the photodiffusion material of the big more material of refringence between photodiffusion material and the translucent material, can reduce the ratio that contains of photodiffusion material in the translucent material more.
Material as such photodiffusion material, for example can enumerate organic materials such as inorganic material such as aluminium oxide, silica, titanium oxide or fluorine-type resin, organic principle and inorganic constituents are carried out with molecular level or particle levels the organic-inorganic composite material etc. of compoundization particle, be formed on emptying aperture in the light transmissive material etc., average grain diameter is for example suitably selected from a few μ m to tens μ m to get final product.
In addition, in the lighting device shown in Fig. 5 (b), only make second 4g ' of wavelength conversion portion of light-emitting device 10g contain photodiffusion material, but also can only make second 4r of wavelength conversion portion of light-emitting device 10r contain photodiffusion material, also can make light-emitting device 10r, 10g contain photodiffusion material respectively.
(embodiment 4)
The difference of present embodiment is, replace light-emitting device 10r, the 10g in the lighting device 20 of embodiment 2 shown in Figure 3, second 4r of wavelength conversion portion that contains different fluorophor respectively of 10b, the situation of 4g, 4b, and make second 4r of wavelength conversion portion, 4g, 4b contain common two or more fluorophor, above-mentioned fluorophor contain the ratio difference.
Constitute light-emitting device 10r, 10g, the 10b of the lighting device 20 of present embodiment,, use led chip 1, the first wavelength conversion portion 2 and the shell 3 of same size in order to radiate the light of different illuminant colours.In addition, light-emitting device 10r, 10g, second 4r of wavelength conversion portion of 10b, 4g, 4b is at each light-emitting device 10r, 10g, be respectively three kinds among the 10b, each second 4r of wavelength conversion portion, 4g, 4b contains respectively common two or more fluorophor and (for example absorbs blue light and send the green-emitting phosphor of green fluorescence in the translucent material as adhesive, send the red-emitting phosphors of red fluorescence with absorbing blue light), contain ratio by containing of each fluorophor become difference shown in for example following table 1 of ratio like that, control thus from second 4r of wavelength conversion portion, 4g, the tone of the light of 4b radiation.
[table 1]
Figure BSA00000372723200261
As a result, all light-emitting device 10r, 10g of lighting device 20,10b, only the fluorophor by adjusting each second wavelength conversion portion contain ratio, just can easily design the color temperature of the light of the different illuminant colour that radiates from light-emitting device 10r, 10g, 10b.In addition, because light-emitting device 10r, the 10g of lighting device 20, second 4r of wavelength conversion portion of 10b, 4g, 4b are by common identical fluorophor combination, therefore initial characteristic and the time behavior of the led chip 1 or second 4r of wavelength conversion portion, 4g, 4b are identical in fact, can suppress the aberration that the process by surrounding environment or time causes.
(embodiment 5)
Utilize Fig. 6 and Fig. 7 to the luminescence unit of present embodiment and use the ligthing paraphernalia of this luminescence unit to describe.In addition, in Fig. 6 and Fig. 7, give identical symbol to identical structural element.
The luminescence unit shown in Figure 6 10 of present embodiment possesses: light-emitting device 4, send the mixed light (for example standard light (D65)) of white color system, and have as the led chip 1 of semiconductor light-emitting elements and in translucent resin, contain the wavelength conversion parts 2 (the first wavelength conversion portion) of fluorescent material, this fluorescent material absorbs from the blue light of this led chip 1 and sends fluorescence as the yellow system of complementary colours; And installation base plate 5, this light-emitting device 4 is installed in a surperficial 5a side forms.
Especially, luminescence unit 10 has wavelength conversion portion 6 (the second wavelength conversion portion) and forms, this wavelength conversion portion 6 cover at least the light that sends white color system light-emitting device 4 illuminating part 4aa and form separately, send the correlated colour temperature lower light of mixed light of the above-mentioned white color system of selfluminous device 4 recently.Here, correlated colour temperature be illustrated in light source color not on the blackbody radiation track and under the complete inconsistent situation recently like the temperature of black matrix.
In addition, wavelength conversion portion 6 shown in Fig. 6 (b), cover at least the light send white color system light-emitting device 4 illuminating part 4aa and form separately, and dispose with the illuminating part 4aa of light-emitting device 4 with leaving.
Here, the luminescence unit 10 of Fig. 6 (a) constitutes, and a plurality of (being 6 here) light-emitting device 4 is installed on the surperficial 5a side of installation base plate 5.In addition, the notch 5b that when the peripheral part of installation base plate 5 possesses internal fixation to lighting device 20a described later, 20b, 20c, 20d, utilizes.
More specifically, luminescence unit 10 is equipped with 6 light-emitting devices 4 in a surperficial 5a side of flat installation base plate 5.In the inside of light-emitting device 4 recess 3a separately, dispose the led chip 1 that constitutes by nitride semi-conductor material that sends blue light (for example peak luminous wavelength is the light of the blueness of 460nm) as semiconductor light-emitting elements.Led chip 1 is electrically connected with the lead frame (not shown) that extends to the outside of shell 3 from the inside of the recess 3a of the shell 3 of light-emitting device 4.Led chip 1 is by contain fluorescent material (for example Ba0.05Sr0.93Eu0.02) 2SiO4 in translucent resin (for example silicone resin)) wavelength conversion portion 2 cover, this fluorescent material absorbs the fluorescence that sends from the blue light of this led chip 1 as the yellow system of complementary colours.In addition, light-emitting device 4 constitutes, and the conductive pattern (not shown) that the above-mentioned surperficial 5a side at installation base plate 5 is formed by soldering etc. is electrically connected with above-mentioned lead frame, can power to led chip 1 thus.If to led chip 1 power supply of light-emitting device 4, then led chip 1 sends blue light, and the fluorescent material of wavelength conversion parts 2 absorbs blue light and sends sodium yellow from the outside.By transmission wavelength conversion parts 2 from the blue light of led chip 1 and colour mixture from the sodium yellow of the fluorescent material of wavelength conversion parts 2, thus the correlated colour temperature of sending the blackbody radiation the light of white color system from the illuminating part 4aa of light-emitting device 4 be about 5000k daytime white light.
Here, emitting the correlated colour temperature lower white of white light in daytime of the illuminating part 4aa of selfluminous device 4 recently from luminescence unit 10, under the situation of the light of temperature white or bulb look, luminescence unit 10 as long as dispose the wavelength conversion portion 6 and the illuminating part 4aa of light-emitting device 4 with leaving, this wavelength conversion portion 6 covers the illuminating part 4aa of light-emitting device 4 and forms separately, and contain fluorescent material (for example (Ba0.05Sr0.93Eu0.02) 2SiO4) and be shaped to hemispherically in translucent resin (for example silicone resin), this fluorescent material absorbs the fluorescence that sends from the blue light of this led chip 1 as the yellow system of complementary colours.Here, wavelength conversion portion 6 is by increasing the concentration of above-mentioned fluorescent material in resin, can make correlated colour temperature from the light of wavelength conversion portion 6 radiation from white side direction bulb look side step-down.In addition, forming hemispheric wavelength conversion portion 6 can be fixed by not shown Embedded Division, also can fix by the bonding agent that is made of silicone resin etc., so that cover the illuminating part 4aa of light-emitting device 4.
Thus, luminescence unit 10 as shown in Figure 7, before a surperficial 5a who light-emitting device 4 is installed to installation base plate 5, can commonly produce only a kind of luminescence unit 10, and, just can become the luminescence unit 10 of the light that obtains two or more color temperatures only by the having or not or be replaced by the 6b of wavelength conversion portion, 6c, the 6d that is used for luminous color temperature as purpose of wavelength conversion portion 6.In Fig. 7, use from the arrow diagramming of luminescence unit 10 different respectively lighting device 20b, 20c, the vertical view of 20d, use the schematic section of representing lighting device 20b, 20c, 20d from the arrow of this vertical view.
That is, the luminescence unit 10 of present embodiment does not cover in light-emitting device 4 under the situation of wavelength conversion portion 6 of shape, and the light that sends from luminescence unit 10 for example can become the light that tone is equivalent to the correlated colour temperature of white in daytime.In addition, luminescence unit 10b is, cover the 6b of wavelength conversion portion of the lid shape that forms separately with the illuminating part 4aa of the light-emitting device 4 of the light that sends white in daytime with leaving, can send correlated colour temperature from light-emitting device 4 thus and liken light to into the lower white of the light of basic white color system (white in daytime).In addition, luminescence unit 10c is, cover the 6c of wavelength conversion portion of the lid shape that forms separately with the illuminating part 4aa of the light-emitting device 4 of the light that sends white in daytime, can send that correlated colour temperature likens to from light-emitting device 4 thus is the light of the low temperature white of the light of basic white color system (white in daytime) with leaving.Equally, luminescence unit 10d is, cover the 6d of wavelength conversion portion of the lid shape that forms separately with the illuminating part 4aa of the light-emitting device 4 of the light that sends white in daytime with leaving, can send correlated colour temperature from light-emitting device 4 thus and liken light to into the low bulb look of the light of basic white color system (white in daytime).
So each luminescence unit 10 that forms is configured in appliance body 22 inner the getting final product of lighting device 20a, 20b, 20c, 20d respectively.Wanting to make lighting device 20a, 20b, 20c, 20d at random to emit under the situation of illuminant colour of different correlated colour temperatures, multi-wavelength's transformation component 6 of preparing to send the lower light of the light of the white color system that correlated colour temperature sends than the illuminating part 4aa from light-emitting device 4 gets final product.In addition, being not limited to correlated colour temperature from the light of the white color system of light-emitting device 4 radiation is light before and after the 5000k, also can be set at as lighting device 20a, 20b, 20c, 20d and send the colourity higher than the correlated colour temperature that sets.
Below, each structure of using among the luminescence unit 10 of detailed description present embodiment and lighting device 20a, 20b, 20c, the 20d.
The light-emitting device 4 employed semiconductor light-emitting elements of the luminescence unit 10 of present embodiment are can pass through energising and luminous semiconductor element.The light of semiconductor light-emitting elements radiation for example can be for the energy in the visible light stronger blue light, but be not only to be defined in blue light, by from as the luminous of the led chip 1 of semiconductor light-emitting elements with send from wavelength conversion parts 2 luminous under the situation of light of white color system, for effective excitation wavelength transform component 2, also can use the light of ultraviolet ray or other wavelength.As the led chip 1 of above-mentioned semiconductor light-emitting elements, for example can enumerate the chip that on crystal growth substrates such as sapphire substrate, spinelle substrate, gallium nitride base board, zinc oxide substrate or silicon carbide substrate, has the gallium nitride compound semiconductor layer that possesses the pn knot.
In addition, led chip 1 also can adopt and form semiconductor layer on the insulating properties substrate, form the led chip 1 of each positive and negative electrode respectively in the same one side side of this semiconductor layer, also can adopt the led chip 1 that uses conductive board and formed each positive and negative electrode in the two sides side of the thickness direction of led chip 1 respectively.
Being provided with the led chip 1 of each positive and negative electrode with the one side side, can use salient points such as metal salient point, flip-chip is installed on the surface and has formed on the bottom surface of recess 3a of shell 3 of light-emitting device 4 of pair of conductive pattern.In addition, be provided with the led chip 1 of each positive and negative electrode in the two sides side of the thickness direction of led chip 1, carry out the tube core welding via electroconductive component (for example AuSn or Ag thickener etc.), and a conductive pattern in the pair of conductors pattern that forms on the bottom surface of the recess 3a that makes at the shell that led chip 1 is installed is electrically connected with an above-mentioned electrode of led chip 1.In addition, another electrode that makes the light of led chip 1 take out the face side via wire (for example, aluminum steel or gold thread etc.) is electrically connected with another conductive pattern and gets final product.
In the light-emitting device 4 of the luminescence unit 10 of present embodiment, in the recess 3a of shell 3, a led chip 1 is installed as semiconductor light-emitting elements, also can use a plurality of but led chip 1 is not limited in one.In this case, each led chip 1 suitably is electrically connected gets final product with series, parallel or series-parallel mode.
In addition, up to the present, by having used a light-emitting device 4 as the led chip 1 of semiconductor light-emitting elements, be difficult to obtain with in the past general illumination device in the enough light output that is equal to mutually of light sources such as fluorescent lamp.Therefore, a plurality of light-emitting devices 4 are configured in installation base plate 5 surperficial 5a side and as luminescence unit 10.In this case, owing to be difficult to make the uniform hue of the light that sends from each light-emitting device 4, therefore in the luminescence unit 10 of present embodiment, the light-emitting device 4 of the light that sends white color system is installed in a surperficial 5a side of installation base plate 5 in advance, and, can improve luminescence unit 10 thus tremendously or use the productivity of the lighting device 20 of luminescence unit 10 by multi-wavelength's transformation component 6 control correlated colour temperatures.
Then, the light-emitting device 4 employed wavelength conversion parts 2 of the luminescence unit 10 of present embodiment, in translucent resin or glass etc., contain the parts that make from the fluorescent material of at least a portion wavelength conversion of the light of led chip 1 in order to send the light of white color system from the illuminating part 4aa of light-emitting device 4, can to use.Wavelength conversion parts 2 employed fluorescent materials, for example handle beyond the nitride-based fluorescent materials such as (Sr, Ca) 2Si5N8 to adopt (Sr, Ca, Mg) AlSiN3 of activating by Eu, to activate by Eu halogen borate (Off ァ ロ ボ レ one ト) class fluorescent materials such as silicates fluorescent material such as the aluminate class fluorescent materials such as Tb3Al5O12 that can also adopt the Y3Al5O12 that activates by Ce, activate by Ce, the Ba2SiO4 that activates by Eu or (Sr, Ba, Ca) 2SiO4 of activating by Eu or Ca2BO3C12.In addition, wavelength conversion parts 2 employed above-mentioned fluorescent materials are not limited to yellow fluorescent substance, also can obtain white light even for example add red fluorescent material and green fluorescence material.
Then, the light-emitting device 4 employed shells 3 of the luminescence unit 10 of present embodiment can be protected led chip 1 and wavelength conversion parts 2 as semiconductor light-emitting elements, can be formed by resin or pottery etc.For the light from led chip 1 and wavelength conversion parts 2 is sent to prescribed direction effectively, the preferred shell 3 that possesses following recess 3a that uses regards to from the reflection of light rate of led chip 1 and wavelength conversion parts 2 higher in this recess 3a.But shell 3 might not need to possess recess 3a.Therefore, light-emitting device 4 is according to the material or the structure of shell 3, and the integral body of light-emitting device 4 works as illuminating part 4aa sometimes.In addition, light-emitting device 4 is not a surperficial 5a side that only is installed in installation base plate 5, also can be installed in installation base plate 5 with another face side that surperficial 5a is opposite.In this case, shell 3 is constituted as follows get final product: light-emitting device 4 can be installed in above-mentioned another face side, so that send the light of white color system from the through hole (not shown) of installation base plate 5.
The luminescence unit 10 employed installation base plates 5 of present embodiment can be installed in light-emitting device 4 a surperficial 5a side.Installation base plate 5 also can utilize a surperficial 5a to be provided with the substrate of pair of conductors pattern (not shown), and constitutes the electrical path of light-emitting device 4.Such installation base plate 5 can adopt ceramic substrates such as the metal substrate, aluminium nitride or the aluminium oxide that have used Fe material, Cu material or Al material etc. or glass epoxy resin substrate etc.Have at installation base plate 5 under the situation of electric conductivity, in order to prevent the short circuit with above-mentioned conductive pattern, suitably form insulating barrier in a surperficial 5a side of installation base plate 5 and get final product.Under the situation of the ceramic substrate that has used aluminium nitride as installation base plate 5, to compare pyroconductivity higher with glass epoxy resin substrate etc., the heat that produces owing to lighting a lamp of light-emitting device 4 is dispelled the heat effectively to the outside, can improve the thermal diffusivity of luminescence unit 10.
In addition, the luminescence unit 10 of present embodiment has used flat installation base plate 5 for mounting light emitting device 4, but also can use the perimembranous at installation base plate 5 to possess the installation base plate 5 that reflection comes the reflection of light device of selfluminous device 4.
Taking in of present embodiment among lighting device 20a, the 20b of luminescence unit 10,20c, the 20d, in vertical view shown in Figure 7, preferably a surperficial 5a side at installation base plate 5 is provided with covering portion 7, and this covering portion 7 possesses the reflection of light device 7a of portion that reflection comes selfluminous device 4 in each light-emitting device 4 perimembranous separately.
The employed wavelength conversion of the luminescence unit 10 of present embodiment portion 6 sends the low light of light of the white color system that correlated colour temperature sends than the illuminating part 4aa from light-emitting device 4.Wavelength conversion portion 6 for example can be made of translucent materials such as the silicone resin that contains fluorescent material, epoxy resin, allyl resin or glass, and fluorescent material absorbs and the radiation sodium yellow the blue light composition in the light of the white color system of coming selfluminous device 4.
According to from the light of luminescence unit 10 radiation as the correlated colour temperature of target or from the light intensity of the white color system of light-emitting device 4 radiation, can select the thickness of multi-wavelength's transformation component 6.In addition, the fluorescent material that in the translucent material of wavelength conversion portion 6, contains, according to the thickness of the luminous efficiency of fluorescent material, wavelength conversion portion 6, from the light of light-emitting device 4 radiation as the correlated colour temperature of target or from the light intensity of the white color system of light-emitting device 4 radiation and difference, but for example can be made as below the 50 weight %.
In addition, as wavelength conversion portion 6 employed fluorescent materials, for example except the nitride-based fluorescent materials such as (Sr, Ca) 2Si5N8 that can adopt (Sr, Ca, Mg) AlSiN3 of activating by Eu, activate by Eu, halogen borate class fluorescent materials such as silicates fluorescent material such as the aluminate class fluorescent materials such as Tb3Al5O12 that can also adopt the Y3Al5O12 that activates by Ce, activate by Ce, the Ba2SiO4 that activates by Eu or (Sr, Ba, Ca) 2SiO4 of activating by Eu or Ca2BO3C12.In addition, wavelength conversion portion 6 employed above-mentioned fluorescent materials are not limited to yellow fluorescent substance, for example also can add red fluorescent material and green fluorescence material.
Here, under the situation that the illuminating part 4aa and the wavelength conversion portion 6 of light-emitting device 4 do not dispose with leaving, the wavelength conversion portion 6 that is covered on the led chip 1 is heated along with lighting a lamp of light-emitting device 4.Wavelength conversion portion 6 has that light output is risen along with temperature and the characteristic of the temperature quenching that reduces, so wavelength conversion portion 6 is can not integral body luminous equably, the tendency that has the luminous efficiency of wavelength conversion portion 6 to reduce.
With respect to this, under the situation that the illuminating part 4aa and the wavelength conversion portion 6 of light-emitting device 4 are left, can suppress wavelength conversion portion 6 and be heated, and can suppress luminous efficiency and reduce along with lighting a lamp of led chip 1.
But, the luminescence unit 10 of present embodiment, by with a kind of luminescence unit 10 as wavelength conversion portion 6 basic, that exchange forms separately, can form the luminescence unit 10 of the light that sends different tones thus.In this case, at the luminescence unit 10 that does not form wavelength conversion portion 6 with covered by wavelength conversion portion 6 in the luminescence unit 10 of illuminating part of light-emitting devices 4, it is different with color rendering to be not only illuminant colour, and the sensing angle of the light of emitting from each light-emitting device 4 also changes sometimes.
Therefore, the luminescence unit 10 of present embodiment can also make the variations such as lens shape of hemispheric wavelength conversion portion 6 adjust according to the amount of fluorescent material, so that do not change in fact from the sensing angle of the light of light-emitting device 4 radiation.
Also the amount that can form according to fluorescent material on the medial surface of wavelength conversion portion 6 has the concavo-convex of different sizes or angle, so as under the situation that is provided with optional wavelength transformation component 6, all consistent from the sensing angle of the light of such light-emitting device 4 radiation.
Here, luminescence unit 10 is for the light that sends first tone (for example daytime white), as being the light-emitting device 4 that the blue light of led chip 1 radiation is directly emitted to the outside, 5 light-emitting devices 4 are installed in a surperficial 5a side of installation base plate 5 from semiconductor light-emitting elements.
In addition, also can consider the luminescence unit 10 that is constructed as follows: will be from the blue light of light-emitting device 4 radiation etc. as luminous Essential colour, the wavelength conversion portion 6 by the lid shape carries out wavelength conversion, sends the white light of hope thus.But, light-emitting device 4 has following tendency: blue light wavelength inequality of emitting from led chip 1 or light output are uneven, by that it is transformed to as the unequal change of tone of the combination results of the wavelength conversion portion of the lid shape of the sodium yellow of complementary colours is big with absorbing blue light.Therefore, in the luminescence unit 10 employed light-emitting devices 4 of present embodiment, making will be basic from the mixed light conduct of fluorescent material radiation from the light of light-emitting device 4 radiation, and form luminescence unit 10.
Semiconductor light-emitting elements by wavelength conversion portion 6 covers is formed with wavelength conversion portion 6 across air, so because the reflection at the interface of wavelength conversion portion 6 etc., it is even further to reduce irregular colour.
Such wavelength conversion portion 6 is, mixes fluorescent material and wait moulding by ejection formation in transparent members such as silicone resin or epoxy resin, glass, can form desirable shape thus fairly simplely.
(embodiment 6)
The basic structure of the lighting device shown in Figure 7 20 of present embodiment, the roughly the same structure of lighting device 20a, 20b, 20c, 20d of the luminescence unit 10 that is and has used embodiment shown in Figure 65, difference is, as shown in Figure 8, replace the wavelength conversion portion 6 of the lid shape in the embodiment 5 and used the laminar wavelength conversion 6e of portion, 6f, 6g.In addition, for giving identical symbol, and suitably omit explanation with the same structural element of embodiment 5.
Fig. 8 illustrates for the lighting device 20 of making present embodiment, the light-emitting device 4 along the direction of arrow from schematic section to the luminescence unit of overlooking 10, from luminescence unit 10 to the light-emitting area and the schematic section that luminescence unit 10 are received into the lighting device 20 lighting device 20a, 20e, 20f, the 20g.
At first, light-emitting device 4 is installed the led chip 1 that can send blue light in the recess 3a of shell 3, and fills wavelength conversion parts 2 in the mode that covers led chip 1.Send the white light L1 in daytime of the light of white color system from the illuminating part 4aa of light-emitting device 4.
The luminescence unit 10 of present embodiment has: light-emitting device 4 possesses the led chip 1 as semiconductor light-emitting elements, and sends the white light L1 in daytime of white color system; And installation base plate 5, this light-emitting device 4 is installed in a surperficial 5a side.Light-emitting device 4, with send identical white color system daytime white light L1 light-emitting device 4 be installed on the surperficial 5a of installation base plate 5.
Then, installation on the installation base plate 5 luminescence unit 10 of a plurality of (being 6 here) light-emitting device 4, the laminar wavelength conversion 6e of portion, 6f, 6g are accommodated in the inside of the appliance body 22 of lighting device 20e, 20f, 20g, the 6e of this wavelength conversion portion, 6f, 6g cover each illuminating part 4aa of light-emitting device 4 and form separately, and send the low light of white color L1 in daytime of the white color system that correlated colour temperature sends separately than the illuminating part 4aa from light-emitting device 4.
Here, by forming the 6e of wavelength conversion portion, 6f, 6g laminar, can not cover the wavelength conversion portion 6 of the lid shape in the embodiment 1 respectively individually to a plurality of light-emitting devices 4, and can by be clamped into and the luminescent panel (not shown) of lighting device 20e, 20f, 20g between form.Therefore, can significantly improve the operability that is used to form luminescence unit 10 or lighting device 20e, 20f, 20g.
In addition, by the laminar wavelength conversion 6e of portion, 6f, 6g are remained on from the position that light-emitting device 4 leaves, can not be subjected to thus that conversion light rate among the laminar wavelength conversion 6e of portion, 6f, the 6g reduces, based on the harmful effect of the heating of light-emitting device 4, and can suppress the reduction of luminous efficiency.Therefore, the laminar wavelength conversion 6e of portion, 6f, 6g also have following effect: replenish to make to lower from the correlated colour temperature of the light of above-mentioned wavelength conversion portion 6 radiation and be bulb colour system etc., the reduction that improves the luminous taking-up efficient under the situation of concentration of fluorescent material.
Such luminescence unit 10, the laminar wavelength conversion 6e of portion, 6f, 6g are overlapped in transmission from the translucent panel (not shown) of the light of light-emitting device 4 radiation, and be accommodated in the inside of appliance body 22, constitute lighting device 20e, 20f, 20g thus.In addition, forming the situation of slice part by the translucent panel of lighting device 20e, 20f, 20g and wavelength conversion portion 6 are fitted or forming by the print process of having used serigraphy under the situation of the Printing Department that constitutes by wavelength conversion portion 6, by the exchange of translucent panel, also has the effect that can freely change tone arbitrarily.In addition, above-mentioned coating part or above-mentioned slice part can also possess the removal position of the light transmissive wavelength conversion portion 6 of the white color system that makes selfluminous device 4, can suitably form the figure of hope or decorative pattern etc. by this removal position.
(embodiment 7)
The basic structure of the lighting device shown in Figure 9 20 of present embodiment, roughly the same with lighting device 20a, 20e, 20f, the 20g of the luminescence unit 10 that has used embodiment shown in Figure 86, difference is, as shown in Figure 9, replacement is formed on the wavelength conversion portion 6 of embodiment 2 on the translucent panel, and wavelength conversion portion 6 is formed on the medial surface of bubble cap 21.In addition, give identical symbol, and suitably omit explanation for the structural element identical with embodiment 6.
Lighting device 20 shown in Fig. 9 of present embodiment (a) for example is the mode with lighting device 20 of the such shape of lamp affixed to the ceiling.Lighting device 20 has: luminescence unit 10 comprises the light-emitting device 4 of the light that sends white color system and this light-emitting device 4 is installed in the installation base plate 5 that a surperficial 5a side forms; And appliance body 22, possess the bubble cap 21 of transmission from the light of light-emitting device 4 radiation.
In addition, lighting device 20 shown in Fig. 9 (b) has wavelength conversion portion 6 at the medial surface of the bubble cap 21 of the lighting device 20 shown in Fig. 9 (a), this wavelength conversion portion 6 covers light-emitting device 4 and forms separately, and sends the light low light of correlated colour temperature than the above-mentioned white color system of sending from light-emitting device 4.
Thus, lighting device 20 constitutes, and the structure that the light-emitting device 4 that sends the light of white color system is installed in a surperficial 5a side of installation base plate 5 is basic.In addition, lighting device shown in Fig. 9 (a) 20 uses bubble cap 21 monomers of the script that does not possess wavelength conversion portion 6, and sends the light of white color system of key colour of the light-emitting device 4 of selfluminous cell 10.Lighting device 20 shown in Fig. 9 (b) uses the unit with luminescence unit 10 identical type of Fig. 9 (a), and possesses the coating part 23 that has been coated with wavelength conversion portion 6 on the surface of the inboard of bubble cap 21 on the whole.Equally, also can replace being coated with on the whole the coating part 23 of wavelength conversion portion 6 on the surface of the inboard of bubble cap 21, and by overlapping the slice part (not shown) that forms wavelength conversion portion 6.Thus, lighting device 20 can send the low light of light as the white color system of key colour that correlated colour temperature is sent than light-emitting device 4 from bubble cap 21.
The lighting device 20 of present embodiment is same with the lighting device 20 of embodiment 6, and the effect that has is: the exchange of the exchange by bubble cap 21 or the wavelength conversion portion 6 of lamella shape etc. can change the correlated colour temperature from the light of lighting device 20.In addition, wavelength conversion portion 6 might not be formed on the medial surface of bubble cap 21, also can be formed on lateral surface or inside.
And then, the lighting device 20 of present embodiment as shown in figure 10, the above-mentioned coating part or the above-mentioned slice part as wavelength conversion portion 6 of bubble cap 21, possess the removal position 12 of the light transmissive wavelength conversion portion 6 of the white color system that makes selfluminous device 4, this removal position 12 for example can also constitute the figure or the decorative pattern of the star or the moon.Removing position 12 also can be removal, non-coating part, or also can obtain tone arbitrarily thus by being coated with different fluorescent material etc. separately.In addition, also can constitute figure or decorative pattern by overlapping multiple fluorescent material.
That is, bubble cap 21 possess on the surface send with from the tone of the light of wavelength conversion portion 6 and the fluorescence part that comes the light of the different tone of the tone of light of selfluminous device 4, this fluorescence part can also constitute at least one of figure or decorative pattern.Thus, lighting device 20 can obtain the luminous of figure arbitrarily or decorative pattern, and the good lighting device of design 20 can be provided.

Claims (12)

1. lighting device, the control device that possesses the different a plurality of light-emitting devices of illuminant colour and the light output ratio of a plurality of above-mentioned light-emitting devices is controlled, and make from the tone of the mixed light of the light of the different a plurality of above-mentioned light-emitting device radiation of illuminant colour variablely, it is characterized in that
A plurality of above-mentioned light-emitting devices possess the light-emitting component and the first wavelength conversion portion respectively, and this first wavelength conversion portion absorbs from least a portion of the light of this light-emitting component radiation and the fluorescence after sending wavelength conversion;
The above-mentioned light-emitting device of a part in a plurality of above-mentioned light-emitting devices has the second wavelength conversion portion, this second wavelength conversion portion will be from above-mentioned light-emitting component or the above-mentioned first wavelength conversion portion at least a portion of light of at least one side's radiation, wavelength conversion be the different illuminant colour of illuminant colour with the light that radiates from above-mentioned light-emitting component and the above-mentioned first wavelength conversion portion.
2. lighting device as claimed in claim 1 is characterized in that,
The photodiffusion material that makes the light diffusion is contained in the above-mentioned second wavelength conversion portion.
3. lighting device as claimed in claim 1 or 2 is characterized in that,
The above-mentioned light-emitting device that does not have the above-mentioned second wavelength conversion portion in a plurality of above-mentioned light-emitting devices has the diffusion layer that makes from the light diffusion of the above-mentioned first wavelength conversion portion.
4. lighting device as claimed in claim 1 or 2 is characterized in that,
The above-mentioned second wavelength conversion portion exists multiple to each above-mentioned light-emitting device, common two or more fluorophor is contained respectively in each second wavelength conversion portion, two or more above-mentioned fluorophor contain the ratio difference.
5. luminescence unit has: light-emitting device possesses semiconductor light-emitting elements and sends the light of white color system; And installation base plate, this light-emitting device is installed; Above-mentioned luminescence unit is characterised in that,
Be provided with wavelength conversion portion, this wavelength conversion portion cover at least the light that sends white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device.
6. luminescence unit as claimed in claim 5 is characterized in that,
From the light of the above-mentioned white color system of above-mentioned light-emitting device in the scope of 4500k～7000k.
7. lighting device is characterized in that having:
Appliance body is provided with luminescence unit, and this luminescence unit has the light-emitting device of the light that possesses semiconductor light-emitting elements and send white color system and the installation base plate of this light-emitting device is installed; And
Wavelength conversion portion, cover at least the light send white color system above-mentioned light-emitting device illuminating part and form separately, and send correlated colour temperature recently from the low light of light of the above-mentioned white color system of above-mentioned light-emitting device.
8. lighting device as claimed in claim 7 is characterized in that,
Also possess translucent panel or the bubble cap of transmission, the coating part of above-mentioned wavelength conversion portion on the surface of above-mentioned translucent panel or above-mentioned bubble cap, being coated with from least a portion of the light of above-mentioned luminescence unit.
9. lighting device as claimed in claim 7 is characterized in that,
Also possess translucent panel or the bubble cap of transmission from least a portion of the light of above-mentioned luminescence unit, above-mentioned wavelength conversion portion is set to slice part on the surface of above-mentioned translucent panel or above-mentioned bubble cap.
10. lighting device as claimed in claim 8 is characterized in that,
Above-mentioned coating part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, and this removes at least one side that the position constitutes figure or decorative pattern.
11. lighting device as claimed in claim 9 is characterized in that,
Above-mentioned slice part possesses the removal position that makes from the light transmissive above-mentioned wavelength conversion portion of the white color system of above-mentioned light-emitting device, and this removes at least one side that the position constitutes figure or decorative pattern.
12. lighting device is characterized in that as claimed in claim 8 or 9,
Above-mentioned translucent panel or above-mentioned bubble cap possess fluorescence part from the teeth outwards, this fluorescence part is according to from the color harmony of the light of the above-mentioned wavelength conversion portion light from above-mentioned light-emitting device, send the fluorescence of the tone different with this light, this fluorescence part constitutes at least one side of figure or decorative pattern.
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