WO2002052901A2 - Temperature dependent color control for a luminaire with a multicolored array of leds - Google Patents
Temperature dependent color control for a luminaire with a multicolored array of leds Download PDFInfo
- Publication number
- WO2002052901A2 WO2002052901A2 PCT/IB2001/002519 IB0102519W WO02052901A2 WO 2002052901 A2 WO2002052901 A2 WO 2002052901A2 IB 0102519 W IB0102519 W IB 0102519W WO 02052901 A2 WO02052901 A2 WO 02052901A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cie
- coordinates
- leds
- temperature
- led
- Prior art date
Links
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
- H05B45/22—Controlling the colour of the light using optical feedback
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
Definitions
- the invention relates to a luminaire with a multicolored array of light emitting diodes (LEDs). More particularly, the invention relates to a white light emitting luminaire where the light output and the color of the white light produced by the luminaire vary with temperature.
- LEDs light emitting diodes
- the reference also includes a method which defines the chromaticity of an LED system by specifying the desired chromaticity of the system, calculating the theoretical x, y, and z CIE (Commission Internationale de L'Eclairage) coordinates of the desired chromaticity on a blackbody locus, and providing light from each LED at the selected wavelength based on those coordinates.
- CIE Commission Internationale de L'Eclairage
- the light output will vary, for example, if one or more of the LEDs fails. Given the factors which can affect "the light output and color temperature of any array of LEDs, it would be desirable to automatically control light output and color temperature, especially in a white-light emitting luminaire.
- an array of LEDs made up of at least one LED in each of a plurality of colors in a luminaire, is driven by an experimental method.
- electrical current is supplied to the LEDs in each color, so that they have a light output with a nominal continuous value during ordinary operation.
- CIE xy coordinates for each LED light source are measured for different temperatures.
- the CIE xy coordinates for the LED light sources are expressed as a function of temperature of the LED light source and the expressions are stored in memory. Equations are derived for the CIE x and CIE y coordinates as a function of temperature and are used to calculate the CIE xy coordinates and lumen output fractions while on line. Light output and color of the LEDs is controlled based upon the calculated xy coordinates and lumen output fraction.
- the CIE xy coordinates for the LED light sources are first measured for different temperatures experimentally for the entire operating range. Then, based on the experimental data, the equations for the CIE x and CIE y coordinates are derived as a function of temperature using polynomials. If the CIE xy coordinates are highly non-linear, then higher order polynomials are used to derive the equations.
- the reference lumens are calculated on-line. Therefore, continuous control is provided for the color control.
- This method is well suited for variable color and lumen control. Measured light outputs are feed-back to a controller along with the desired outputs, which may be set by user controls, and changes to the power supply for color blocks are made as necessary. Color of the white light is thus automatically controlled without regard to factors that may cause it to change.
- the user inputs permit varying the desired color of the white light to either warm white (more red output) or cool white (more blue output).
- the reference lumens are calculated off-line first and are expressed as a function of temperature by using polynomials. The temperature is inputted and these equations are then used to obtain the reference lumens on-line.
- a further aspect of the invention provides a method to vary the color temperature of the white light linearly.
- An example of this variance is shifting the color temperature from warm-white to daylight-white. This is achieved by expressing the CIE xy coordinates of the white light on the blackbody locus as a function of color temperature using polynomials. Knowing the CIE xy coordinates of the white light for the desired color point and the CIE xy coordinates of the LED light sources depending on the temperature, the required reference lumen output for each of the colored LED light sources are calculated. These lumens outputs are supplied to a lumen output control system as reference which regulates the lumen output of the LED light sources regardless of temperature and aging.
- Fig. 1 is a schematic diagram of an LED luminaire
- Fig. 2A is a graph showing the variation in CIE x R coordinate for a red LED in an array as a function of temperature
- Fig. 2B is a graph showing the variation in CIE y R coordinate for a red LED in an array as a function of temperature
- Fig. 3 A is a graph showing the variation in CIE XQ coordinate for a green LED in an array as a function of temperature
- Fig. 3B is a graph showing the variation in CIE yo coordinate for a green LED in an array as a function of temperature
- Fig. 4A is a graph showing the variation in CIE x B coordinate for a blue LED in an array as a function of temperature
- Fig. 4B is a graph showing the variation in CIE ys coordinate for a blue LED in an array as a function of heat-sink temperature
- Fig. 5 is a graph showing the variation in reference lumen output fractions for red, green, and blue LED light sources as a function of temperature
- Fig. 6 A is a graph showing the variation of CIE xw coordinate with color temperature for a white LED array as a function of color temperature
- Fig. 6B is a graph showing the variation of CIE y coordinate with color temperature for a white LED array as a function of color temperature.
- an LED luminaire includes a two-dimensional array of LEDs 10, 12, 14 including a plurality of LEDs in each of a plurality of colors.
- the LEDs 10, 12, 14 receive power from power supply 9 which sends current through LED drivers 11, 13, 15.
- the array includes red LEDs 10, green LEDs 12, and blue LEDs 14 contained within a heat sink 18.
- the LEDs are arranged so that the overall light output will be combined by mixing optics 22 mounted outside the heat sink 18. LEDs in additional colors, such as amber may be used to enhance the mixing options.
- At least one photosensor 24 e.g., a photodiode, is arranged to sense the light intensity of all the LEDs in the array.
- an optical fiber (not shown) couples light from the array to the photosensor 24, which generates corresponding current signals and sends them to a controller 30 via feedback line 26.
- the LED luminaire in Fig. 1 also includes a temperature sensor 33, such as a thermometer, coupled to a micro-controller or microprocessor unit 34 for calculating CIE xy coordinates for each LED light source for different heat-sink temperatures.
- Micro-controller 34 is coupled to a memory 36 for storing expressions of CIE xy coordinates as a function of the heat-sink temperatures.
- Micro-controller 34 derives equations for the CIE x and CIE y coordinates as a function of heat-sink temperature and calculates the CIE xy coordinates and lumen outputs for the RGB LED arrays on-line.
- Settings inputted into the micro-controller by a user input control 35, such as a potentiometer, control the light output and color temperature of the LEDs based upon the calculated CIE xy coordinates and lumen outputs for the RGB LED arrays.
- the required lumen outputs from the Red, Green, and Blue LED light sources can be calculated by using equation (1).
- the Chromaticity coordinates (xw . yw) for the white light are chosen based on the desired color of the white light. Then, knowing the CIE xy coordinates of the LED light sources the required lumen outputs L R , LQ, and L B are calculated. Since a lumen output control system is required to regulate the lumen outputs of the LED arrays regardless of the changes in temperature and aging, the calculated reference values are supplied to such a control system.
- the CIE xy coordinates for Red, Green, and Blue LEDs also vary with the temperature and the variations make the color of the white light drift from the target color point of the white light.
- the CIE xy coordinates for the LEDs are measured at different heat sink temperatures. Then, the CIE xy coordinates are expressed as a function of temperature by using polynomials. For the control of the color, the temperature of the heat sink is measured and the CIE xy coordinates and the lumen output fractions are then calculated on-line. Since the variations in CIE xy coordinates are stored in the form of expressions, control of the LEDs is not performed in discrete steps, and this approach eliminates the need for large arrays in order to maintain desired accuracy.
- An LED manufacturer data sheet supplies the peak wavelength, the dominant wavelength, the spectral half-width maximum wavelength and the variation in the peak wavelength with the temperature.
- the CIE xy coordinates for the LEDs can be calculated using a guassian or Lorentzian line-shape for the spectra of the LEDs.
- the variation in the CIE x and y chromaticity coordinates for the LED can also be calculated. Then knowing the thermal coefficient for the heat sink and the arrangement of the LEDs in the heat sink, the CIE xy coordinates are obtained as a function of temperature.
- An LED light source is constructed with more than one LED of the same type, and the characteristics of each LED in an LED light source are not identical due to batch-to- batch variations.
- the CIE x and CIE y coordinates of the LED arrays are measured experimentally in order to obtain the CIE x and CIE y coordinates for the proper non- incremental control of color of the white light.
- the CIE xy chromaticity coordinates also vary with the forward current.
- the forward current for the LED arrays can be regulated, for example, by means of Amplitude Modulation (AM) or Pulse- width-modulation (PWM). If the amplitude modulation scheme is used, then CIE xy chromaticity coordinates with the temperature are measured for the average current for the operation. In the PWM scheme, the effect of forward current on the CIE xy coordinates is eliminated due to the constant peak current.
- the CIE xy coordinates with the temperature are measured at the peak current.
- CIE x and CIE y coordinates with the heat-sink temperature for the Red, Green, and Blue LED arrays are shown in Figs. 2A, 2B, 3 A, 3B, 4A, and 4B.
- the variation in CIE x and CIE y are non-linear and therefore, second order polynomials are used to express them.
- the CIE x and CIE y coordinates for the Red and Blue LEDs can then be expressed by using first-order polynomials. Higher-order polynomials can also be used. Since the CIE y coordinate for the Green LED is non-linear, it is expressed by using a second-order polynomial. CIE x and CIE y coordinates of the LED light sources are obtained by using polynomials as a function of heat-sink temperature as follows:
- the desired color temperature for the white light be cool-white with the CIE x and CIE y coordinates of (0.372, 0.375) corresponding to a color temperature of 4250°K.
- the reference lumen output fractions are calculated using the experimental expressions above for the temperature range of 25°C to 75°C, as shown in Fig. 5.
- the required lumens L R , L G , and LB for the Red, Green, and Blue LED light sources are expressed as a function of heat-sink temperature and the required lumen output of white light Lw-
- the color temperature for the white LED luminary can be uniformly varied when variable color temperature for the white light is desired.
- Xw and y are the CIE chromaticity coordinates of the white light which are selected from the blackbody locus based on the desired color temperature of white light. Therefore, the values for xw and yw lie on the blackbody locus. If Xw and yware expressed as a function of color temperature, then by knowing the color temperature, the required value for xw and yw can be calculated.
- the desired color temperature of the white light can be set by a potentiometer. Figs.
- 6A and 6B show the variation in xw and yw with the color temperature for a color temperature range of 2500°K to 6500°K.
- the value of xw and yw lie on the blackbody locus.
- the desired color temperature can also be set by a potentiometer.
- the CIE coordinates xw and yw can be calculated using the above second- order polynomial expressions and the color temperature for the white light can be varied uniformly. Similar expressions can be obtained for different color temperature ranges using polynomials.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60122005T DE60122005T2 (en) | 2000-12-27 | 2001-12-12 | TEMPERATURE-DEPENDING COLOR CONTROL FOR MULTI-COLORED LED MATRIX |
EP01272182A EP1348318B1 (en) | 2000-12-27 | 2001-12-12 | Temperature dependent color control for a luminaire with a multicolored array of leds |
JP2002553872A JP4263484B2 (en) | 2000-12-27 | 2001-12-12 | Lighting fixture with multi-colored array of LEDs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/749,170 US6411046B1 (en) | 2000-12-27 | 2000-12-27 | Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control |
US09/749,170 | 2000-12-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002052901A2 true WO2002052901A2 (en) | 2002-07-04 |
WO2002052901A3 WO2002052901A3 (en) | 2003-04-10 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2001/002519 WO2002052901A2 (en) | 2000-12-27 | 2001-12-12 | Temperature dependent color control for a luminaire with a multicolored array of leds |
Country Status (7)
Country | Link |
---|---|
US (1) | US6411046B1 (en) |
EP (1) | EP1348318B1 (en) |
JP (1) | JP4263484B2 (en) |
KR (1) | KR100805396B1 (en) |
CN (1) | CN1190653C (en) |
DE (1) | DE60122005T2 (en) |
WO (1) | WO2002052901A2 (en) |
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---|---|---|---|---|
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---|---|---|---|---|
US7014336B1 (en) * | 1999-11-18 | 2006-03-21 | Color Kinetics Incorporated | Systems and methods for generating and modulating illumination conditions |
US20030133292A1 (en) | 1999-11-18 | 2003-07-17 | Mueller George G. | Methods and apparatus for generating and modulating white light illumination conditions |
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US6930737B2 (en) * | 2001-01-16 | 2005-08-16 | Visteon Global Technologies, Inc. | LED backlighting system |
US7262752B2 (en) * | 2001-01-16 | 2007-08-28 | Visteon Global Technologies, Inc. | Series led backlight control circuit |
US6552495B1 (en) * | 2001-12-19 | 2003-04-22 | Koninklijke Philips Electronics N.V. | Adaptive control system and method with spatial uniform color metric for RGB LED based white light illumination |
US20030111533A1 (en) * | 2001-12-19 | 2003-06-19 | Koninklijke Philips Electronics N.V. | RGB led based white light control system with quasi-uniform color metric |
US6573536B1 (en) | 2002-05-29 | 2003-06-03 | Optolum, Inc. | Light emitting diode light source |
USRE47011E1 (en) | 2002-05-29 | 2018-08-28 | Optolum, Inc. | Light emitting diode light source |
US20040008968A1 (en) * | 2002-07-09 | 2004-01-15 | L3 Optics, Inc. | Photosensitive optical glass |
US7023543B2 (en) * | 2002-08-01 | 2006-04-04 | Cunningham David W | Method for controlling the luminous flux spectrum of a lighting fixture |
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US6969180B2 (en) | 2003-02-25 | 2005-11-29 | Ryan Waters | LED light apparatus and methodology |
US7004602B2 (en) | 2003-02-25 | 2006-02-28 | Ryan Waters | LED light apparatus and methodology |
US20040184272A1 (en) * | 2003-03-20 | 2004-09-23 | Wright Steven A. | Substrate for light-emitting diode (LED) mounting including heat dissipation structures, and lighting assembly including same |
WO2004100220A2 (en) * | 2003-05-05 | 2004-11-18 | Optolum, Inc | Light emitting diode light source |
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US6967447B2 (en) * | 2003-12-18 | 2005-11-22 | Agilent Technologies, Inc. | Pre-configured light modules |
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CN100421277C (en) * | 2004-01-06 | 2008-09-24 | 统宝光电股份有限公司 | Organic light-emitting diode panel |
CA2496661C (en) * | 2004-02-19 | 2009-05-19 | Oz Optics Ltd. | Light source control system |
US7009343B2 (en) * | 2004-03-11 | 2006-03-07 | Kevin Len Li Lim | System and method for producing white light using LEDs |
US7355284B2 (en) * | 2004-03-29 | 2008-04-08 | Cree, Inc. | Semiconductor light emitting devices including flexible film having therein an optical element |
US20050259424A1 (en) | 2004-05-18 | 2005-11-24 | Zampini Thomas L Ii | Collimating and controlling light produced by light emitting diodes |
US20050273237A1 (en) * | 2004-05-21 | 2005-12-08 | Jyh-Haur Huang | Control method and control structure for lighting system |
EP1776844B1 (en) * | 2004-07-23 | 2014-06-25 | Koninklijke Philips N.V. | System for temperature prioritised colour controlling of a solid-state lighting unit |
US7324076B2 (en) * | 2004-07-28 | 2008-01-29 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Methods and apparatus for setting the color point of an LED light source |
US20060038803A1 (en) * | 2004-08-20 | 2006-02-23 | Semiconductor Components Industries, Llc | LED control method and structure therefor |
US8733966B2 (en) | 2004-08-20 | 2014-05-27 | Mag Instrument, Inc. | LED flashlight |
JP4060841B2 (en) * | 2004-10-06 | 2008-03-12 | 住友ゴム工業株式会社 | Raw tire bead part molding method and raw tire bead part molding apparatus used therefor |
US7573209B2 (en) * | 2004-10-12 | 2009-08-11 | Koninklijke Philips Electronics N.V. | Method and system for feedback and control of a luminaire |
JP4539492B2 (en) * | 2004-11-19 | 2010-09-08 | ソニー株式会社 | Backlight device, backlight driving method, and liquid crystal display device |
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US20070273290A1 (en) * | 2004-11-29 | 2007-11-29 | Ian Ashdown | Integrated Modular Light Unit |
US20100096993A1 (en) * | 2004-11-29 | 2010-04-22 | Ian Ashdown | Integrated Modular Lighting Unit |
US7607797B2 (en) * | 2005-01-06 | 2009-10-27 | S.C. Johnson & Son, Inc. | Microcontroller-controlled multi-color LED apparatus |
US7626345B2 (en) * | 2005-02-23 | 2009-12-01 | Dialight Corporation | LED assembly, and a process for manufacturing the LED assembly |
US8016470B2 (en) * | 2007-10-05 | 2011-09-13 | Dental Equipment, Llc | LED-based dental exam lamp with variable chromaticity |
KR100682076B1 (en) * | 2005-05-23 | 2007-02-13 | 라이트사이언스 주식회사 | Street light lamp |
ES2378325T3 (en) * | 2005-05-25 | 2012-04-11 | Koninklijke Philips Electronics N.V. | Description of two LED colors as a single concentrated LED color |
JP2008545230A (en) * | 2005-06-30 | 2008-12-11 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Method and system for controlling the output of a luminaire |
WO2007007238A1 (en) * | 2005-07-14 | 2007-01-18 | Philips Intellectual Property & Standards Gmbh | Colour point control system |
CA2619613C (en) * | 2005-08-17 | 2015-02-10 | Tir Technology Lp | Digitally controlled luminaire system |
US7986112B2 (en) | 2005-09-15 | 2011-07-26 | Mag Instrument, Inc. | Thermally self-stabilizing LED module |
US20070069632A1 (en) * | 2005-09-26 | 2007-03-29 | Toppoly Optoelectronics Corp. | Electroluminescent device and pixel device |
US7765792B2 (en) | 2005-10-21 | 2010-08-03 | Honeywell International Inc. | System for particulate matter sensor signal processing |
US7479660B2 (en) | 2005-10-21 | 2009-01-20 | Perkinelmer Elcos Gmbh | Multichip on-board LED illumination device |
JP5311639B2 (en) * | 2005-10-26 | 2013-10-09 | コーニンクレッカ フィリップス エヌ ヴェ | LED emitter system |
US7993021B2 (en) * | 2005-11-18 | 2011-08-09 | Cree, Inc. | Multiple color lighting element cluster tiles for solid state lighting panels |
US8514210B2 (en) | 2005-11-18 | 2013-08-20 | Cree, Inc. | Systems and methods for calibrating solid state lighting panels using combined light output measurements |
EP1949765B1 (en) * | 2005-11-18 | 2017-07-12 | Cree, Inc. | Solid state lighting panels with variable voltage boost current sources |
US7926300B2 (en) | 2005-11-18 | 2011-04-19 | Cree, Inc. | Adaptive adjustment of light output of solid state lighting panels |
US7872430B2 (en) | 2005-11-18 | 2011-01-18 | Cree, Inc. | Solid state lighting panels with variable voltage boost current sources |
EA013311B1 (en) * | 2005-12-20 | 2010-04-30 | Агк Флэт Гласс Юроп Са | Illumination correction device |
DE102005061204A1 (en) * | 2005-12-21 | 2007-07-05 | Perkinelmer Elcos Gmbh | Lighting device, lighting control device and lighting system |
WO2007083250A1 (en) * | 2006-01-19 | 2007-07-26 | Philips Intellectual Property & Standards Gmbh | Color-controlled illumination device |
KR20090019766A (en) * | 2006-02-10 | 2009-02-25 | 티아이알 테크놀로지 엘피 | Light source intensity control system and method |
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US7766511B2 (en) | 2006-04-24 | 2010-08-03 | Integrated Illumination Systems | LED light fixture |
WO2007132573A1 (en) * | 2006-05-17 | 2007-11-22 | Sharp Kabushiki Kaisha | Light source controller, light source control program and light source control method |
US8008676B2 (en) | 2006-05-26 | 2011-08-30 | Cree, Inc. | Solid state light emitting device and method of making same |
WO2007142947A2 (en) * | 2006-05-31 | 2007-12-13 | Cree Led Lighting Solutions, Inc. | Lighting device with color control, and method of lighting |
EP2036403B1 (en) * | 2006-06-20 | 2009-11-18 | Koninklijke Philips Electronics N.V. | Illumination system comprising a plurality of light sources |
RU2009104937A (en) * | 2006-07-13 | 2010-08-20 | ТиАйАр ТЕКНОЛОДЖИ ЭлПи (CA) | LIGHT SOURCE AND METHOD FOR OPTIMIZING ITS LIGHTING CHARACTERISTICS |
US7759882B2 (en) * | 2006-07-31 | 2010-07-20 | Microsemi Corp.—Analog Mixed Signal Group Ltd. | Color control for scanning backlight |
TWI323141B (en) * | 2006-09-15 | 2010-04-01 | Coretronic Corp | Method of remedying a plurality of monochromatic light from a plurality of light-emitting diodes and the light-emitting diode control system utilizing the method |
KR100758987B1 (en) * | 2006-09-26 | 2007-09-17 | 삼성전자주식회사 | A led lighting device and a method for controlling the same |
KR100787221B1 (en) * | 2006-09-26 | 2007-12-21 | 삼성전자주식회사 | Optical system based on led and method for aging compensation thereof |
KR100968451B1 (en) * | 2006-10-16 | 2010-07-07 | 삼성전자주식회사 | Display apparatus and control method thereof |
US7729941B2 (en) | 2006-11-17 | 2010-06-01 | Integrated Illumination Systems, Inc. | Apparatus and method of using lighting systems to enhance brand recognition |
US20080136770A1 (en) * | 2006-12-07 | 2008-06-12 | Microsemi Corp. - Analog Mixed Signal Group Ltd. | Thermal Control for LED Backlight |
WO2008078240A1 (en) * | 2006-12-20 | 2008-07-03 | Philips Intellectual Property & Standards Gmbh | Adjusting a driving signal for solid-state lighting devices |
US8013538B2 (en) | 2007-01-26 | 2011-09-06 | Integrated Illumination Systems, Inc. | TRI-light |
US8456388B2 (en) * | 2007-02-14 | 2013-06-04 | Cree, Inc. | Systems and methods for split processor control in a solid state lighting panel |
US7548030B2 (en) * | 2007-03-29 | 2009-06-16 | Microsemi Corp.—Analog Mixed Signal Group Ltd. | Color control for dynamic scanning backlight |
US8330393B2 (en) * | 2007-04-20 | 2012-12-11 | Analog Devices, Inc. | System for time-sequential LED-string excitation |
US20080277361A1 (en) * | 2007-05-07 | 2008-11-13 | The Coca-Cola Company | Dispenser with LED Lighting |
JP2008283155A (en) * | 2007-05-14 | 2008-11-20 | Sharp Corp | Light emitting device, lighting device, and liquid crystal display device |
US7712917B2 (en) * | 2007-05-21 | 2010-05-11 | Cree, Inc. | Solid state lighting panels with limited color gamut and methods of limiting color gamut in solid state lighting panels |
US7622697B2 (en) * | 2007-06-26 | 2009-11-24 | Microsemi Corp. - Analog Mixed Signal Group Ltd. | Brightness control for dynamic scanning backlight |
US20090033612A1 (en) * | 2007-07-31 | 2009-02-05 | Roberts John K | Correction of temperature induced color drift in solid state lighting displays |
US8829820B2 (en) * | 2007-08-10 | 2014-09-09 | Cree, Inc. | Systems and methods for protecting display components from adverse operating conditions |
DE102007040079A1 (en) | 2007-08-24 | 2009-02-26 | Ledon Lighting Gmbh | Method for determining the luminous flux of a light source |
US8742686B2 (en) | 2007-09-24 | 2014-06-03 | Integrated Illumination Systems, Inc. | Systems and methods for providing an OEM level networked lighting system |
US7586274B2 (en) * | 2007-11-09 | 2009-09-08 | The Coca-Cola Company | LED light output linearization |
US8866410B2 (en) | 2007-11-28 | 2014-10-21 | Cree, Inc. | Solid state lighting devices and methods of manufacturing the same |
DE102007059130A1 (en) * | 2007-12-07 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Method and arrangement for setting a color location and luminous system |
US8823630B2 (en) * | 2007-12-18 | 2014-09-02 | Cree, Inc. | Systems and methods for providing color management control in a lighting panel |
US8118447B2 (en) | 2007-12-20 | 2012-02-21 | Altair Engineering, Inc. | LED lighting apparatus with swivel connection |
US7712918B2 (en) | 2007-12-21 | 2010-05-11 | Altair Engineering , Inc. | Light distribution using a light emitting diode assembly |
US8442403B2 (en) | 2008-03-02 | 2013-05-14 | Lumenetix, Inc. | Lighting and control systems and methods |
WO2009113055A2 (en) * | 2008-03-13 | 2009-09-17 | Microsemi Corp. - Analog Mixed Signal Group, Ltd. | A color controller for a luminaire |
US8915609B1 (en) | 2008-03-20 | 2014-12-23 | Cooper Technologies Company | Systems, methods, and devices for providing a track light and portable light |
US7726974B2 (en) | 2008-03-20 | 2010-06-01 | Illumitron International | Magnetic power and data coupling for LED lighting |
US20090244884A1 (en) * | 2008-03-31 | 2009-10-01 | True Manufacturing Co. Inc. | Glass door merchandiser having led lights and mounting assembly therefor |
US8594174B2 (en) * | 2008-04-10 | 2013-11-26 | Nxp B.V. | Rotating pulse-width modulator |
RU2526845C2 (en) * | 2008-05-06 | 2014-08-27 | Конинклейке Филипс Электроникс Н.В. | Light module, illumination system and method of embedding data in emitted light |
RU2010150342A (en) * | 2008-05-09 | 2012-06-20 | Конинклейке Филипс Электроникс Н.В. (Nl) | DEVICE AND METHOD FOR MANAGING THE COLOR POINT OF THE LED LIGHT SOURCE |
US8255487B2 (en) | 2008-05-16 | 2012-08-28 | Integrated Illumination Systems, Inc. | Systems and methods for communicating in a lighting network |
US8360599B2 (en) | 2008-05-23 | 2013-01-29 | Ilumisys, Inc. | Electric shock resistant L.E.D. based light |
US9001161B2 (en) * | 2008-06-06 | 2015-04-07 | Dolby Laboratories Licensing Corporation | Chromaticity control for solid-state illumination sources |
TW201004477A (en) * | 2008-06-10 | 2010-01-16 | Microsemi Corp Analog Mixed Si | Color manager for backlight systems operative at multiple current levels |
US7976196B2 (en) | 2008-07-09 | 2011-07-12 | Altair Engineering, Inc. | Method of forming LED-based light and resulting LED-based light |
US7946729B2 (en) | 2008-07-31 | 2011-05-24 | Altair Engineering, Inc. | Fluorescent tube replacement having longitudinally oriented LEDs |
US8258716B2 (en) * | 2008-08-06 | 2012-09-04 | Jui Chih Yen | Driving power supply system of an active type LED with multiple channels |
US9022612B2 (en) * | 2008-08-07 | 2015-05-05 | Mag Instrument, Inc. | LED module |
US8674626B2 (en) | 2008-09-02 | 2014-03-18 | Ilumisys, Inc. | LED lamp failure alerting system |
US20100060198A1 (en) * | 2008-09-05 | 2010-03-11 | Lite-On It Corporation | LED Lamp and Method for Producing a LED Lamp |
US8256924B2 (en) | 2008-09-15 | 2012-09-04 | Ilumisys, Inc. | LED-based light having rapidly oscillating LEDs |
US9018858B2 (en) * | 2008-09-24 | 2015-04-28 | B/E Aerospace, Inc. | Calibration method for LED lighting systems |
US8214084B2 (en) | 2008-10-24 | 2012-07-03 | Ilumisys, Inc. | Integration of LED lighting with building controls |
US8444292B2 (en) | 2008-10-24 | 2013-05-21 | Ilumisys, Inc. | End cap substitute for LED-based tube replacement light |
US7938562B2 (en) | 2008-10-24 | 2011-05-10 | Altair Engineering, Inc. | Lighting including integral communication apparatus |
US8901823B2 (en) | 2008-10-24 | 2014-12-02 | Ilumisys, Inc. | Light and light sensor |
US8653984B2 (en) | 2008-10-24 | 2014-02-18 | Ilumisys, Inc. | Integration of LED lighting control with emergency notification systems |
US8324817B2 (en) | 2008-10-24 | 2012-12-04 | Ilumisys, Inc. | Light and light sensor |
US7972028B2 (en) * | 2008-10-31 | 2011-07-05 | Future Electronics Inc. | System, method and tool for optimizing generation of high CRI white light, and an optimized combination of light emitting diodes |
US8632208B2 (en) * | 2008-11-07 | 2014-01-21 | Itramas International, Inc. | Methodology of providing white lighting with colour combination |
US8550657B2 (en) * | 2008-11-07 | 2013-10-08 | Itramas International, Inc. | Methodology of maintaining CCT for white light using LED |
US8556452B2 (en) | 2009-01-15 | 2013-10-15 | Ilumisys, Inc. | LED lens |
US9247598B2 (en) * | 2009-01-16 | 2016-01-26 | Mag Instrument, Inc. | Portable lighting devices |
US8362710B2 (en) | 2009-01-21 | 2013-01-29 | Ilumisys, Inc. | Direct AC-to-DC converter for passive component minimization and universal operation of LED arrays |
US8664880B2 (en) | 2009-01-21 | 2014-03-04 | Ilumisys, Inc. | Ballast/line detection circuit for fluorescent replacement lamps |
US8324830B2 (en) * | 2009-02-19 | 2012-12-04 | Microsemi Corp.—Analog Mixed Signal Group Ltd. | Color management for field-sequential LCD display |
US8558782B2 (en) * | 2009-03-24 | 2013-10-15 | Apple Inc. | LED selection for white point control in backlights |
US8585245B2 (en) | 2009-04-23 | 2013-11-19 | Integrated Illumination Systems, Inc. | Systems and methods for sealing a lighting fixture |
CN101876409A (en) * | 2009-04-30 | 2010-11-03 | 苏州向隆塑胶有限公司 | Backlight module capable of fine-tuning chromaticity and light mixing method thereof |
US8330381B2 (en) | 2009-05-14 | 2012-12-11 | Ilumisys, Inc. | Electronic circuit for DC conversion of fluorescent lighting ballast |
US8299695B2 (en) | 2009-06-02 | 2012-10-30 | Ilumisys, Inc. | Screw-in LED bulb comprising a base having outwardly projecting nodes |
EP2446715A4 (en) | 2009-06-23 | 2013-09-11 | Ilumisys Inc | Illumination device including leds and a switching power control system |
US8796948B2 (en) * | 2009-11-10 | 2014-08-05 | Lumenetix, Inc. | Lamp color matching and control systems and methods |
US20110115407A1 (en) * | 2009-11-13 | 2011-05-19 | Polar Semiconductor, Inc. | Simplified control of color temperature for general purpose lighting |
EP2553316B8 (en) | 2010-03-26 | 2015-07-08 | iLumisys, Inc. | Led light tube with dual sided light distribution |
EP2553320A4 (en) | 2010-03-26 | 2014-06-18 | Ilumisys Inc | Led light with thermoelectric generator |
WO2011119958A1 (en) | 2010-03-26 | 2011-09-29 | Altair Engineering, Inc. | Inside-out led bulb |
US8624505B2 (en) | 2010-05-28 | 2014-01-07 | Tsmc Solid State Lighting Ltd. | Light color and intensity adjustable LED |
JP5785616B2 (en) | 2010-06-30 | 2015-09-30 | コーニンクレッカ フィリップス エヌ ヴェ | Dimmable lighting device |
US8454193B2 (en) | 2010-07-08 | 2013-06-04 | Ilumisys, Inc. | Independent modules for LED fluorescent light tube replacement |
EP2593714A2 (en) | 2010-07-12 | 2013-05-22 | iLumisys, Inc. | Circuit board mount for led light tube |
US8523394B2 (en) | 2010-10-29 | 2013-09-03 | Ilumisys, Inc. | Mechanisms for reducing risk of shock during installation of light tube |
US8870415B2 (en) | 2010-12-09 | 2014-10-28 | Ilumisys, Inc. | LED fluorescent tube replacement light with reduced shock hazard |
US9066381B2 (en) | 2011-03-16 | 2015-06-23 | Integrated Illumination Systems, Inc. | System and method for low level dimming |
US9967940B2 (en) | 2011-05-05 | 2018-05-08 | Integrated Illumination Systems, Inc. | Systems and methods for active thermal management |
TWI441558B (en) * | 2011-05-25 | 2014-06-11 | Nat Univ Tsing Hua | Lighting device with color temperature adjusting functionality |
WO2012167107A1 (en) * | 2011-06-01 | 2012-12-06 | B/E Aerospace, Inc. | Vehicle led reading light grouping system and method |
US20130002144A1 (en) * | 2011-06-03 | 2013-01-03 | Osram Sylvania Inc. | Multimode color tunable light source and daylighting system |
US10030833B2 (en) | 2011-06-03 | 2018-07-24 | Osram Sylvania Inc. | Multimode color tunable light source and daylighting system |
CN102196641A (en) * | 2011-06-15 | 2011-09-21 | 浙江晶日照明科技有限公司 | Automatic dimming garden lamp |
US11917740B2 (en) | 2011-07-26 | 2024-02-27 | Hunter Industries, Inc. | Systems and methods for providing power and data to devices |
US8710770B2 (en) | 2011-07-26 | 2014-04-29 | Hunter Industries, Inc. | Systems and methods for providing power and data to lighting devices |
US20150237700A1 (en) | 2011-07-26 | 2015-08-20 | Hunter Industries, Inc. | Systems and methods to control color and brightness of lighting devices |
US9521725B2 (en) | 2011-07-26 | 2016-12-13 | Hunter Industries, Inc. | Systems and methods for providing power and data to lighting devices |
US9609720B2 (en) | 2011-07-26 | 2017-03-28 | Hunter Industries, Inc. | Systems and methods for providing power and data to lighting devices |
US10874003B2 (en) | 2011-07-26 | 2020-12-22 | Hunter Industries, Inc. | Systems and methods for providing power and data to devices |
US9072171B2 (en) | 2011-08-24 | 2015-06-30 | Ilumisys, Inc. | Circuit board mount for LED light |
US8928249B2 (en) | 2011-08-25 | 2015-01-06 | Abl Ip Holding Llc | Reducing lumen variability over a range of color temperatures of an output of tunable-white LED lighting devices |
CN102404918B (en) * | 2011-11-30 | 2014-01-15 | 鸿富锦精密工业(深圳)有限公司 | LED color temperature adjusting system and method |
US8960964B2 (en) | 2012-02-06 | 2015-02-24 | Lumenetix, Inc. | Thermal dissipation structure for light emitting diode |
US9060409B2 (en) | 2012-02-13 | 2015-06-16 | Lumenetix, Inc. | Mobile device application for remotely controlling an LED-based lamp |
US9288865B2 (en) | 2012-02-13 | 2016-03-15 | Lumenetix, Inc. | Expert system for establishing a color model for an LED-based lamp |
US9089032B2 (en) | 2012-02-13 | 2015-07-21 | Lumenetix, Inc. | System and method for color tuning light output from an LED-based lamp |
US9184518B2 (en) | 2012-03-02 | 2015-11-10 | Ilumisys, Inc. | Electrical connector header for an LED-based light |
GB2501237A (en) * | 2012-03-12 | 2013-10-23 | Lumonic Ltd | Colour crossfade engine |
RU2494495C1 (en) * | 2012-03-30 | 2013-09-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики" | Multielement colour radiation source |
DE102012205381A1 (en) | 2012-04-02 | 2013-10-02 | Osram Gmbh | LED lighting device with mint and amber LEDs |
DE102012205461A1 (en) | 2012-04-03 | 2013-10-10 | Osram Gmbh | Light emitting diode useful in light-emitting device, comprises a through-light element, whose transmission factor is temperature dependent for light emitted from the light emitting diode |
DE102012205465A1 (en) * | 2012-04-03 | 2013-10-10 | Osram Gmbh | Lighting device, particularly filament bulb-retrofit lamp, has semiconductor light source for generating color component of light of lighting device, where movable element is provided for changing color component |
US9167656B2 (en) | 2012-05-04 | 2015-10-20 | Abl Ip Holding Llc | Lifetime correction for aging of LEDs in tunable-white LED lighting devices |
WO2014008463A1 (en) | 2012-07-06 | 2014-01-09 | Ilumisys, Inc. | Power supply assembly for led-based light tube |
US9271367B2 (en) | 2012-07-09 | 2016-02-23 | Ilumisys, Inc. | System and method for controlling operation of an LED-based light |
US8894437B2 (en) | 2012-07-19 | 2014-11-25 | Integrated Illumination Systems, Inc. | Systems and methods for connector enabling vertical removal |
JP2015534701A (en) | 2012-08-28 | 2015-12-03 | デロス リビング エルエルシーDelos Living Llc | Systems, methods, and articles for promoting wellness associated with living environments |
US9379578B2 (en) | 2012-11-19 | 2016-06-28 | Integrated Illumination Systems, Inc. | Systems and methods for multi-state power management |
US9420665B2 (en) | 2012-12-28 | 2016-08-16 | Integration Illumination Systems, Inc. | Systems and methods for continuous adjustment of reference signal to control chip |
US9485814B2 (en) | 2013-01-04 | 2016-11-01 | Integrated Illumination Systems, Inc. | Systems and methods for a hysteresis based driver using a LED as a voltage reference |
US9285084B2 (en) | 2013-03-14 | 2016-03-15 | Ilumisys, Inc. | Diffusers for LED-based lights |
TWI550916B (en) * | 2013-03-25 | 2016-09-21 | 大地光纖股份有限公司 | Illumination apparatus |
CN104236854A (en) * | 2013-06-17 | 2014-12-24 | 展晶科技(深圳)有限公司 | Light-emitting diode light source array simulating system and simulating method |
ES2527555B1 (en) * | 2013-06-25 | 2016-01-19 | Universitat Politècnica De Catalunya | Method and system for spectral reconstruction of standardized light sources |
CN104298838B (en) * | 2013-07-15 | 2017-06-20 | 深圳市绎立锐光科技开发有限公司 | The target amount adjustment method and a kind of light source of light source |
US9013467B2 (en) | 2013-07-19 | 2015-04-21 | Institut National D'optique | Controlled operation of a LED lighting system at a target output color |
US9267650B2 (en) | 2013-10-09 | 2016-02-23 | Ilumisys, Inc. | Lens for an LED-based light |
WO2015112437A1 (en) | 2014-01-22 | 2015-07-30 | Ilumisys, Inc. | Led-based light with addressed leds |
EP3111411A4 (en) | 2014-02-28 | 2017-08-09 | Delos Living, LLC | Systems, methods and articles for enhancing wellness associated with habitable environments |
US9338851B2 (en) * | 2014-04-10 | 2016-05-10 | Institut National D'optique | Operation of a LED lighting system at a target output color using a color sensor |
US9510400B2 (en) | 2014-05-13 | 2016-11-29 | Ilumisys, Inc. | User input systems for an LED-based light |
US9839090B2 (en) * | 2014-05-27 | 2017-12-05 | The University Of Hong Kong | Correlated colour temperature control system and method |
CN109346005B (en) * | 2014-06-26 | 2021-10-01 | 萤光勒克斯株式会社 | Organic EL panel control device, light source device, organic EL panel control method, program, and recording medium |
US10819824B2 (en) | 2015-05-11 | 2020-10-27 | Lumenetix, Llc | Secure mobile lighting control system |
US10918030B2 (en) | 2015-05-26 | 2021-02-16 | Hunter Industries, Inc. | Decoder systems and methods for irrigation control |
US10228711B2 (en) | 2015-05-26 | 2019-03-12 | Hunter Industries, Inc. | Decoder systems and methods for irrigation control |
US10030844B2 (en) | 2015-05-29 | 2018-07-24 | Integrated Illumination Systems, Inc. | Systems, methods and apparatus for illumination using asymmetrical optics |
US10060599B2 (en) | 2015-05-29 | 2018-08-28 | Integrated Illumination Systems, Inc. | Systems, methods and apparatus for programmable light fixtures |
US10161568B2 (en) | 2015-06-01 | 2018-12-25 | Ilumisys, Inc. | LED-based light with canted outer walls |
CN105934020B (en) * | 2016-04-27 | 2018-05-04 | 浙江大学 | A kind of method of multi-colored led match spectrum and illumination |
CN105973470B (en) * | 2016-04-27 | 2017-11-17 | 浙江大学 | A kind of multi-colored led Spectral matching method for realizing colourity limitation |
CN107101172B (en) * | 2017-03-24 | 2019-04-05 | 广州市雅江光电设备有限公司 | It is a kind of to fast implement random color color mixing method for colored lamp |
CN107222948A (en) * | 2017-05-22 | 2017-09-29 | 广东省半导体产业技术研究院 | A kind of LED/light source of photochromic stabilization |
US11668481B2 (en) | 2017-08-30 | 2023-06-06 | Delos Living Llc | Systems, methods and articles for assessing and/or improving health and well-being |
DE102018004826A1 (en) * | 2018-06-15 | 2019-12-19 | Inova Semiconductors Gmbh | Method and system arrangement for setting a constant wavelength |
EP3850458A4 (en) | 2018-09-14 | 2022-06-08 | Delos Living, LLC | Systems and methods for air remediation |
JP7122628B2 (en) * | 2018-09-28 | 2022-08-22 | パナソニックIpマネジメント株式会社 | Illumination lighting device, lighting device, and lighting fixture |
TWI826530B (en) * | 2018-10-19 | 2023-12-21 | 荷蘭商露明控股公司 | Method of driving an emitter array and emitter array device |
WO2020176503A1 (en) | 2019-02-26 | 2020-09-03 | Delos Living Llc | Method and apparatus for lighting in an office environment |
WO2020198183A1 (en) | 2019-03-25 | 2020-10-01 | Delos Living Llc | Systems and methods for acoustic monitoring |
CN110337158B (en) * | 2019-07-01 | 2021-11-05 | 深圳和而泰智能照明有限公司 | Light emitting control method and device of light emitting diode |
US10801714B1 (en) | 2019-10-03 | 2020-10-13 | CarJamz, Inc. | Lighting device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5812105A (en) * | 1996-06-10 | 1998-09-22 | Cree Research, Inc. | Led dot matrix drive method and apparatus |
US5851063A (en) * | 1996-10-28 | 1998-12-22 | General Electric Company | Light-emitting diode white light source |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU695608B2 (en) * | 1995-06-07 | 1998-08-20 | Toyoda Gosei Co. Ltd. | Light-driven display device |
JPH09214000A (en) | 1996-02-06 | 1997-08-15 | Matsushita Electron Corp | Light-emitting diode device and color image input device using light-emitting diode device thereof |
US5836676A (en) | 1996-05-07 | 1998-11-17 | Koha Co., Ltd. | Light emitting display apparatus |
JPH10319911A (en) | 1997-05-15 | 1998-12-04 | Matsushita Electric Ind Co Ltd | Led display device and control method therefor |
-
2000
- 2000-12-27 US US09/749,170 patent/US6411046B1/en not_active Expired - Lifetime
-
2001
- 2001-12-12 JP JP2002553872A patent/JP4263484B2/en not_active Expired - Fee Related
- 2001-12-12 KR KR1020027011159A patent/KR100805396B1/en not_active IP Right Cessation
- 2001-12-12 CN CNB018056369A patent/CN1190653C/en not_active Expired - Fee Related
- 2001-12-12 EP EP01272182A patent/EP1348318B1/en not_active Expired - Lifetime
- 2001-12-12 WO PCT/IB2001/002519 patent/WO2002052901A2/en active IP Right Grant
- 2001-12-12 DE DE60122005T patent/DE60122005T2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5812105A (en) * | 1996-06-10 | 1998-09-22 | Cree Research, Inc. | Led dot matrix drive method and apparatus |
US5851063A (en) * | 1996-10-28 | 1998-12-22 | General Electric Company | Light-emitting diode white light source |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007514454A (en) * | 2003-06-27 | 2007-06-07 | プランメカ オイ | LED treatment light |
US7825574B2 (en) | 2003-09-24 | 2010-11-02 | Osram Gesellschaft mit beschränkter Haftung | High-efficiency led-based illumination system with improved color rendering |
US7965031B2 (en) | 2003-09-24 | 2011-06-21 | Osram Gesellschaft mit beschränkter Haftung | White-emitting LED having a defined color temperature |
EP1692585A2 (en) * | 2003-12-05 | 2006-08-23 | Dialight Corporation | Dynamic color mixing led device |
EP1692585A4 (en) * | 2003-12-05 | 2009-12-09 | Dialight Corp | Dynamic color mixing led device |
JP2005331644A (en) * | 2004-05-19 | 2005-12-02 | Mitsubishi Electric Corp | Image display device and image display method |
US7675249B2 (en) | 2004-07-12 | 2010-03-09 | Sony Corporation | Apparatus and method for driving backlight unit |
US8111020B2 (en) | 2004-07-12 | 2012-02-07 | Sony Corporation | Apparatus and method for driving backlight unit |
US8979318B2 (en) | 2004-08-05 | 2015-03-17 | Osram Opto Semiconductors Gmbh | Light source with a low color temperature |
US7619193B2 (en) | 2005-06-03 | 2009-11-17 | Koninklijke Philips Electronics N.V. | System and method for controlling a LED luminary |
CN100420348C (en) * | 2005-11-23 | 2008-09-17 | 圆创科技股份有限公司 | LED array drive circuit |
US8708560B2 (en) | 2007-09-07 | 2014-04-29 | Arnold & Richter Cine Technik, Gmbh & Co. Betriebs Kg | Method and apparatus for adjusting the color properties or the photometric properties of an LED illumination device |
Also Published As
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KR20020079958A (en) | 2002-10-21 |
EP1348318A2 (en) | 2003-10-01 |
DE60122005D1 (en) | 2006-09-14 |
CN1190653C (en) | 2005-02-23 |
DE60122005T2 (en) | 2007-03-08 |
US6411046B1 (en) | 2002-06-25 |
CN1443304A (en) | 2003-09-17 |
JP4263484B2 (en) | 2009-05-13 |
JP2004517444A (en) | 2004-06-10 |
EP1348318B1 (en) | 2006-08-02 |
WO2002052901A3 (en) | 2003-04-10 |
KR100805396B1 (en) | 2008-02-20 |
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