CN102376832A - White light emitting diode - Google Patents
White light emitting diode Download PDFInfo
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- CN102376832A CN102376832A CN2010102493912A CN201010249391A CN102376832A CN 102376832 A CN102376832 A CN 102376832A CN 2010102493912 A CN2010102493912 A CN 2010102493912A CN 201010249391 A CN201010249391 A CN 201010249391A CN 102376832 A CN102376832 A CN 102376832A
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- emitting diode
- white light
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Abstract
The invention relates to a white light emitting diode. The white light emitting diode comprises: a light emitting diode chip; a first wavelength conversion layer; and a second wavelength conversion layer. The light emitting diode chip consists of a first luminous interval and a second luminous interval and at least two currents are respectively conducted between the first luminous interval and the second luminous interval; and besides, the light emitting diode chip emits a blue light. The first wavelength conversion layer is arranged on the first luminous interval; and when the first wavelength conversion layer is excited by the blue light, a first conversion light ray is generated and is mixed with the blue light to form a warm white light ray. And the second wavelength conversion layer is arranged on the second luminous interval; and when the second wavelength conversion layer is excited by the blue light, a second conversion light ray is generated and is mixed with the blue light to form a cold white light ray. Moreover, current magnitudes of the currents are controlled, so that luminous intensities of all the luminous intervals are adjusted and adjustment on a color temperature of a white light emitting diode is realized.
Description
Technical field
The present invention relates to a kind of white light emitting diode, relate in particular to and a kind ofly have different-colour to reach the white light emitting diode of dimming function.
Background technology
(Light Emitted Diode LED) is a kind of semiconductor subassembly to light-emitting diode, mainly converts electrical energy into luminous energy through semiconducting compound, reaches luminous effect, therefore has characteristics such as life-span length, stable height and power consumption are little.Initial stage is used lamp mainly as indicator light, traffic sign or signboard advertisement board, along with the appearance of white light emitting diode, begins to be applied to lighting apparatus.
The production method of conventional white light light-emitting diode is yellow (the Yttrium Aluminum Garnet of yttrium-aluminium-garnet system of coating on blue LED chip; YAG) fluorescent material; After this yellow fluorescence pruinescence was blue-light excited, the gold-tinted that it produced carried out mixed light and produces white light with the blue light that originally was used to excite.
Yet because the white light emitting diode of blue LED chip and this yellow fluorescent powder made, blue light accounts for the major part of spectrum, therefore has the higher and uneven phenomenon of mixed light of colour temperature.
In addition, also there is part manufacturer that above-mentioned white light emitting diode collocation red light-emitting diode or green light LED are carried out mixed light, forms a light source module, with the higher problem of this white light emitting diode colour temperature that neutralizes.But because the light-emitting diode of individual colors is made from a variety of materials respectively, its driving voltage is difference to some extent also, causes the degree of difficulty on the circuit design to improve; And the temperature characterisitic of the light-emitting diode of individual colors and life-span and inequality, make and the also difference to some extent of photochromic and life cycle of Different Light module cause the inconvenience in the use.
Summary of the invention
Seeing that prior art is said; For solving that conventional white light light-emitting diode colour temperature is higher, mixed light is inhomogeneous and using the problems such as convenient degree is not good that go up; A purpose of the present invention; Be to provide a kind of and can produce the white light of different-colour simultaneously, and mix the white light emitting diode of those white lights with the adjustment colour temperature.
For achieving the above object, the present invention provides a kind of white light emitting diode, comprises a light-emitting diode chip for backlight unit, one first wavelength conversion layer and one second wavelength conversion layer.
This light-emitting diode chip for backlight unit comprise between one first luminous zone and one second luminous zone between, between this first luminous zone and between this second luminous zone respectively conducting at least two electric currents are arranged, this light-emitting diode chip for backlight unit sends a blue light.
On this first wavelength conversion layer was arranged between this first luminous zone, this first wavelength conversion layer received blue-light excited back to produce one first conversion light, and this first conversion light also becomes a warm white line with the blue light mixed light.
On this second wavelength conversion layer was arranged between this second luminous zone, this second wavelength conversion layer received blue-light excited back to produce one second conversion light, and this second conversion light also becomes a cold white light line with the blue light mixed light; By the magnitude of current of those electric currents of control,, and reach the adjustment of white light emitting diode colour temperature with the adjustment luminous intensity between this luminous zone respectively.
Effect of the present invention is; White light emitting diode of the present invention is distinguished at least two intervals with a light-emitting diode chip for backlight unit; And be coated with different wavelength conversion layer in different intervals; Make those intervals produce the white light of different-colour simultaneously, through mixing the white light of those different-colours, reach the adjustment of white light emitting diode colour temperature again.Its whole preparation process is easy, and solves effectively because of the light-emitting diode that uses different photochromic light-emitting diode adjustment colour temperature caused and do not wait useful life and the driving voltage difference causes the complicated problem of circuit design.
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Description of drawings
Fig. 1 is the vertical view of the white light emitting diode of first embodiment of the invention;
Fig. 2 is the cutaway view of the white light emitting diode of first embodiment of the invention;
Fig. 3 is the vertical view of electrode of light emitting diode connected mode of the present invention;
Fig. 4 is the cutaway view of electrode of light emitting diode connected mode of the present invention;
Fig. 5 is the vertical view of the white light emitting diode of second embodiment of the invention; And
Fig. 6 is a colour temperature coordinate diagram.
Wherein, Reference numeral
1 white light emitting diode
10 blue led chips
Between 12 first luminous zones
Between 14 second luminous zones
100 luminescence units
102 conductive units
20 first wavelength conversion layers
30 second wavelength conversion layers
Lc warm white line
The cold white light line of Lw
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done concrete description:
Cooperate and consult Fig. 1 and Fig. 2, be respectively the vertical view and the cutaway view of the white light emitting diode of first embodiment of the invention.This white light emitting diode 1 includes a blue LED chip 10, one first wavelength conversion layer 20, one second wavelength conversion layer 30.
This blue LED chip 10 sends a blue light, and this blue LED chip 10 comprises between one first luminous zone between 12 and 1 second luminous zone 14, and 12 conductings have one first electric current I between this first luminous zone
1, 14 conductings have one second electric current I between this second luminous zone
2In present embodiment; This blue LED chip 10 comprises 16 and is the luminescence unit 100 that matrix form is arranged; Between this first luminous zone 12 and this second luminous zone between 14 comprise eight luminescence units that are connected in series 100 respectively, but on reality is used, not as limit.
Cooperate and to consult Fig. 3 and Fig. 4, be the vertical view and the cutaway view of the electrode connection mode of white light emitting diode of the present invention.Between this first luminous zone 12 and this second luminous zone between 14 comprise a plurality of luminescence units 100 respectively; Respectively 100 of this luminescence units are to utilize conductive unit 102 to be connected in series; This mode of being connected in series is with the anodal anticathode connection bunchiness of a plurality of luminescence units 100, makes through the electric current of those luminescence units 100 all equal.
Consult Fig. 1 and Fig. 2 again, this first wavelength conversion layer 20 is arranged between this first luminous zone 12, and this first wavelength conversion layer 20 comprises yellow photoluminescent phosphor and red photoluminescent phosphor, can absorb short wavelength's blue light and sends the light of longer wavelength.12 conductings have this first electric current I when between this first luminous zone
1The time; Being arranged between this first luminous zone 12 first wavelength conversion layer 20 receives blue-light excited back to produce one first conversion light L1; And this first conversion light L1 becomes a warm white line Lw with the blue light mixed light, wherein this warm white line is meant the reference color temperature at 2670K to 3800K.
This second wavelength conversion layer 30 is arranged between this second luminous zone 14, and this second wavelength conversion layer 30 comprises yellow photoluminescent phosphor.14 conductings have this second electric current I when between this second luminous zone
2The time; Being arranged between this second luminous zone 14 second wavelength conversion layer 30 receives blue-light excited back to produce one second conversion light L2; And this second conversion light L2 becomes a cold white light line Lc with the blue light mixed light, wherein this cold white light line is meant the reference color temperature at 5000K to 10000K.
When between this first luminous zone 12 and this second luminous zone between 14 respectively conducting simultaneously first electric current I is arranged
1With second electric current I
2The time, between this first luminous zone 12 with this second luminous zone between 14 produce one mixes this warm white line Lw and this cold white light line Lc neutral white light, wherein this neutral white light is meant the reference color temperature at 3800K to 5000K.
And, when the number of 12 luminescence unit 100 between this first luminous zone equals between this second luminous zone the number of 14 luminescence unit 100, through control flows through between this first luminous zone 12 and this second luminous zone between this first electric current I of 14
1With this second electric current I
2The size of the magnitude of current also can reach the function of the colour temperature of this white light emitting diode 1 of control, wherein the size of this magnitude of current is proportional to the size of the luminous intensity of emitted light between this luminous zone.When first electric current I
1The magnitude of current equal second electric current I
2The magnitude of current time, the luminous intensity of warm white line Lw equates that with the luminous intensity of this cold white light line Lc this white light emitting diode 1 sends a neutral white light; When this first electric current I
1Greater than this second electric current I
2The time, the luminous intensity of this warm white line Lw is greater than the luminous intensity of this cold white light line Lc, and this white light emitting diode 1 sends a warm partially white neutral white light, perhaps when this second electric current I
2When being zero, this white light emitting diode 1 sends a warm white line; When this first electric current I
1Less than this second electric current I
2The time, the luminous intensity of this warm white line Lw is less than the luminous intensity of this cold white light line Lc, and this white light emitting diode 1 sends a colder white neutral white light, perhaps when this first electric current I
1When being zero, this white light emitting diode 1 sends a cold white light line.
Cooperate and to consult Fig. 5, be the vertical view of the white light emitting diode of second embodiment of the invention.The maximum difference of the white light emitting diode of present embodiment and the white light emitting diode of the foregoing description is between the luminous zone of this blue LED chip 10 12 distribution mode.Between first luminous zone of the blue LED chip 10 in the present embodiment 12 and this second luminous zone between the setting of 14 interleaved, and in between should first luminous zone 12 and this second luminous zone between 14 this first wavelength conversion layer 20 and this second wavelength conversion layer 30 is set.When between this first luminous zone 12 and this second luminous zone between respectively conducting this first electric current I is arranged
1With second electric current I
2The time; Between this first luminous zone 12 with this second luminous zone between 14 produce this warm white line Lw and cold white light line Lc with corresponding, and between this first luminous zone 12 with this second luminous zone between 14 this warm white line Lw of being produced after mixing, produce neutral white light with cold white light line Lc light.Specifically and since first luminous zone between 12 and this second luminous zone between 14 interleaved settings, cause the uniformity of mixed neutral white light significantly to promote.
Cooperating and consult Fig. 6, is a colour temperature coordinate diagram.This colour temperature coordinate diagram position of colour temperature 6000K, colour temperature 4000K and colour temperature 3000K is respectively done sign, and wherein colour temperature 6000K is cold white light line, and colour temperature 4000K is a neutral white light, and colour temperature 3000K is the warm white line.
Following table is the measurement data of white light emitting diode of the present invention; In present embodiment; This white light emitting diode comprises six luminescence units that are arranged; Comprise three luminescence units that are connected in series 100 respectively between between this first luminous zone and this second luminous zone; Wherein flow through respectively first electric current and second electric current between between this first luminous zone and this second luminous zone, and the magnitude of current of first electric current equals the magnitude of current of second electric current, to measure to six luminescence units that can send different-colour respectively.Wherein numbering 1 to 6 is to carry out the measurement of colour temperature to above-mentioned six luminescence units.X, the Y coordinate of numbering 1,2,3 luminescence unit in the table are respectively (0.3263,0.3397), (0.3266,0.3394), (0.3263,0.3398), and its coordinate position is corresponding colour temperature 6021K, 5980K, 6051K respectively, supply to send cold white light line.X, the Y coordinate of numbering 4,5,6 luminescence unit in the table are respectively (0.4404,0.4160), (0.4410,0.4150), (0.4422,0.4162), and its coordinate position is corresponding colour temperature 3012K, 2990K, 2982K respectively, supply to send the warm white line.Numbering 7 is the mixed light measurement data of the white light emitting diode formed of luminescence unit of six different-colours of combination in the table; The position in the colour temperature coordinate of the white light emitting diode behind this mixed light is (0.3752; 0.3733), the corresponding colour temperature of this position is 4108K, supplies to send a neutral white light.
| Numbering | The X coordinate positions | The Y coordinate positions | Colour temperature (K) |
| 1 | 0.3263 | 0.3397 | 6021 |
| 2 | 0.3266 | 0.3394 | 5980 |
| 3 | 0.3263 | 0.3398 | 6051 |
| 4 | 0.4404 | 0.4160 | 3012 |
| 5 | 0.4410 | 0.4150 | 2990 |
| 6 | 0.4422 | 0.4162 | 2982 |
| 7 | 0.3752 | 0.3733 | 4108 |
Comprehensive the above, white light emitting diode of the present invention is distinguished at least two intervals with a blue LED chip, and in the different different wavelength conversion layers of interval coating; Make those interval, utilize the size of current of those electric currents, those intervals of selectivity conducting through at least two electric currents; To produce the white light of different-colour simultaneously; Through mixing the white light of those different-colours, reach the adjustment of white light emitting diode colour temperature, again to increase its light modulation property.The whole preparation process of the present invention is easy, and solves effectively because of the light-emitting diode that uses different photochromic light-emitting diode adjustment colour temperature caused and do not wait useful life and the driving voltage difference causes the complicated problem of circuit design.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. a white light emitting diode is characterized in that, comprises:
One light-emitting diode chip for backlight unit, its comprise between one first luminous zone and one second luminous zone between, between this first luminous zone and between this second luminous zone respectively conducting at least two electric currents are arranged, wherein this light-emitting diode chip for backlight unit sends a blue light;
One first wavelength conversion layer, be arranged between this first luminous zone on, this first wavelength conversion layer receives blue-light excited back to produce one first conversion light, this first conversion light also becomes a warm white line with the blue light mixed light; And
One second wavelength conversion layer; On being arranged between this second luminous zone, this second wavelength conversion layer receives blue-light excited back to produce one second conversion light, and this second conversion light also becomes a cold white light line with the blue light mixed light; Wherein, By the magnitude of current of those electric currents of control,, and reach the adjustment of white light emitting diode colour temperature with the adjustment luminous intensity between this luminous zone respectively.
2. white light emitting diode according to claim 1 is characterized in that, those electric currents include one first electric current and one second electric current.
3. white light emitting diode according to claim 1 is characterized in that, this first wavelength conversion layer includes yellow photoluminescent phosphor and red photoluminescent phosphor.
4. white light emitting diode according to claim 1 is characterized in that, this second wavelength conversion layer includes yellow photoluminescent phosphor.
5. white light emitting diode according to claim 1 is characterized in that, comprises a plurality of luminescence units respectively between between this first luminous zone and this second luminous zone.
6. white light emitting diode according to claim 5 is characterized in that, the luminescence unit number that comprises between between this first luminous zone and this second luminous zone is identical.
7. white light emitting diode according to claim 6 is characterized in that, this first electric current equals this second electric current, and this white light emitting diode sends neutral white light.
8. white light emitting diode according to claim 3 is characterized in that respectively this luminescence unit is for being connected in series.
9. white light emitting diode according to claim 3 is characterized in that those luminescence units are arrayed.
10. white light emitting diode according to claim 1 is characterized in that, those luminescence unit interleaved are provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102493912A CN102376832A (en) | 2010-08-10 | 2010-08-10 | White light emitting diode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102493912A CN102376832A (en) | 2010-08-10 | 2010-08-10 | White light emitting diode |
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|---|---|
| CN102376832A true CN102376832A (en) | 2012-03-14 |
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|---|---|---|---|
| CN2010102493912A Pending CN102376832A (en) | 2010-08-10 | 2010-08-10 | White light emitting diode |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9095029B2 (en) | 2012-12-28 | 2015-07-28 | Industrial Technology Research Institute | Light source apparatus |
| CN106784259A (en) * | 2016-11-10 | 2017-05-31 | 深圳天珑无线科技有限公司 | A kind of multi color temperature mixing light source and preparation method thereof, mobile terminal |
| US9693408B2 (en) | 2012-12-28 | 2017-06-27 | Industrial Technology Research Institute | Light source apparatus |
| WO2017157073A1 (en) * | 2016-03-17 | 2017-09-21 | 天津三安光电有限公司 | Light-emitting diode and method for manufacturing same |
| US10039169B2 (en) | 2012-12-28 | 2018-07-31 | Industrial Technology Research Institute | Light source apparatus |
| CN110168722A (en) * | 2017-03-27 | 2019-08-23 | 首尔半导体株式会社 | Light emitting module |
| US10485070B2 (en) | 2012-12-28 | 2019-11-19 | Industrial Technology Research Institute | Light source apparatus and display apparatus |
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| US20070223219A1 (en) * | 2005-01-10 | 2007-09-27 | Cree, Inc. | Multi-chip light emitting device lamps for providing high-cri warm white light and light fixtures including the same |
| US20090086475A1 (en) * | 2007-10-01 | 2009-04-02 | Intematix Corporation | Color tunable light emitting device |
| CN101498416A (en) * | 2008-02-02 | 2009-08-05 | 绎立锐光科技开发(深圳)有限公司 | Emergent light color adjustable light source and method thereof |
| WO2010036364A1 (en) * | 2008-09-24 | 2010-04-01 | Luminus Devices, Inc. | Light-emitting device including independently electrically addressable sections |
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- 2010-08-10 CN CN2010102493912A patent/CN102376832A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070223219A1 (en) * | 2005-01-10 | 2007-09-27 | Cree, Inc. | Multi-chip light emitting device lamps for providing high-cri warm white light and light fixtures including the same |
| US20090086475A1 (en) * | 2007-10-01 | 2009-04-02 | Intematix Corporation | Color tunable light emitting device |
| CN101498416A (en) * | 2008-02-02 | 2009-08-05 | 绎立锐光科技开发(深圳)有限公司 | Emergent light color adjustable light source and method thereof |
| WO2010036364A1 (en) * | 2008-09-24 | 2010-04-01 | Luminus Devices, Inc. | Light-emitting device including independently electrically addressable sections |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9095029B2 (en) | 2012-12-28 | 2015-07-28 | Industrial Technology Research Institute | Light source apparatus |
| US9693408B2 (en) | 2012-12-28 | 2017-06-27 | Industrial Technology Research Institute | Light source apparatus |
| US10039169B2 (en) | 2012-12-28 | 2018-07-31 | Industrial Technology Research Institute | Light source apparatus |
| US10485070B2 (en) | 2012-12-28 | 2019-11-19 | Industrial Technology Research Institute | Light source apparatus and display apparatus |
| WO2017157073A1 (en) * | 2016-03-17 | 2017-09-21 | 天津三安光电有限公司 | Light-emitting diode and method for manufacturing same |
| CN106784259A (en) * | 2016-11-10 | 2017-05-31 | 深圳天珑无线科技有限公司 | A kind of multi color temperature mixing light source and preparation method thereof, mobile terminal |
| CN110168722A (en) * | 2017-03-27 | 2019-08-23 | 首尔半导体株式会社 | Light emitting module |
| CN111048493A (en) * | 2017-03-27 | 2020-04-21 | 首尔半导体株式会社 | Light emitting module |
| US11688836B2 (en) | 2017-03-27 | 2023-06-27 | Seoul Semiconductor Co., Ltd. | Light emitting module |
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Application publication date: 20120314 |