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WO2002090909A3 - System for measuring chromaticity coordinates - Google Patents

System for measuring chromaticity coordinates Download PDF

Info

Publication number
WO2002090909A3
WO2002090909A3 PCT/IB2002/001492 IB0201492W WO02090909A3 WO 2002090909 A3 WO2002090909 A3 WO 2002090909A3 IB 0201492 W IB0201492 W IB 0201492W WO 02090909 A3 WO02090909 A3 WO 02090909A3
Authority
WO
WIPO (PCT)
Prior art keywords
leds
light
chromaticity coordinates
green
red
Prior art date
Application number
PCT/IB2002/001492
Other languages
French (fr)
Other versions
WO2002090909A2 (en
Inventor
Chin Chang
Original Assignee
Koninkl Philips Electronics Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to EP02722631A priority Critical patent/EP1393029B1/en
Priority to DE60230406T priority patent/DE60230406D1/en
Priority to JP2002588121A priority patent/JP4067973B2/en
Priority to KR1020037000231A priority patent/KR100865222B1/en
Publication of WO2002090909A2 publication Critical patent/WO2002090909A2/en
Publication of WO2002090909A3 publication Critical patent/WO2002090909A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/52—Measurement of colour; Colour measuring devices, e.g. colorimeters using colour charts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
    • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
    • G01J1/32—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors adapted for automatic variation of the measured or reference value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/465—Measurement of colour; Colour measuring devices, e.g. colorimeters taking into account the colour perception of the eye; using tristimulus detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • G01J3/513—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
    • G01J2001/4252—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources for testing LED's
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J2003/1282—Spectrum tailoring

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

A system and method for identifying primary color chromaticity coordinates of a red, green and blue light sources includes a tristimulus filter the receives the combined light generated by the light sources. The light sources are preferably a group of red, green and blue light emitting diodes. A processor is configured to generate a plurality of test control signals that sets a desired intensity value for each of the red, green and blue LEDs. Based on these test control signals, the system is configured to measure three sets of chromaticity coordinates corresponding to the combined light generated by these red, green and blue LEDs. The processor thereafter calculates the color chromaticity coordinates of the LEDs, based on the measured coordinates of the combined light, and the intensity values of the LEDs, and the intensity values of the combined light. This calculation in accordance with one embodiment of the invention is accomplished by solving a matrix equation. Once the color coordinates of the individual light sources is uniquely calculated, the system measures the intensity values of light for each of the light sources that is necessary to provide a combined light with a desired color chromaticity coordinates. These intensity values can be used in a feedback control circuit to maintain the desired combined light as the LEDs change their characteristics from batch to batch or over time.
PCT/IB2002/001492 2001-05-08 2002-04-25 System for measuring chromaticity coordinates WO2002090909A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02722631A EP1393029B1 (en) 2001-05-08 2002-04-25 System for measuring chromaticity coordinates
DE60230406T DE60230406D1 (en) 2001-05-08 2002-04-25 SYSTEM FOR MEASURING CHROMATIZATION COORDINATES
JP2002588121A JP4067973B2 (en) 2001-05-08 2002-04-25 Chromaticity coordinate measuring device
KR1020037000231A KR100865222B1 (en) 2001-05-08 2002-04-25 System for measuring chromaticity coordinates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/851,099 2001-05-08
US09/851,099 US6992803B2 (en) 2001-05-08 2001-05-08 RGB primary color point identification system and method

Publications (2)

Publication Number Publication Date
WO2002090909A2 WO2002090909A2 (en) 2002-11-14
WO2002090909A3 true WO2002090909A3 (en) 2003-09-25

Family

ID=25309979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/001492 WO2002090909A2 (en) 2001-05-08 2002-04-25 System for measuring chromaticity coordinates

Country Status (7)

Country Link
US (1) US6992803B2 (en)
EP (1) EP1393029B1 (en)
JP (1) JP4067973B2 (en)
KR (1) KR100865222B1 (en)
CN (1) CN100392367C (en)
DE (1) DE60230406D1 (en)
WO (1) WO2002090909A2 (en)

Families Citing this family (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7014336B1 (en) * 1999-11-18 2006-03-21 Color Kinetics Incorporated Systems and methods for generating and modulating illumination conditions
US20040052076A1 (en) * 1997-08-26 2004-03-18 Mueller George G. Controlled lighting methods and apparatus
WO2001024584A1 (en) * 1999-09-29 2001-04-05 Color Kinetics, Inc. Systems and methods for calibrating light output by light-emitting diodes
US6992803B2 (en) * 2001-05-08 2006-01-31 Koninklijke Philips Electronics N.V. RGB primary color point identification system and method
ATE392122T1 (en) * 2002-12-26 2008-04-15 Koninkl Philips Electronics Nv COLOR TEMPERATURE CORRECTION FOR LED WITH PHOSPHORUS-BASED WAVELENGTH CONVERSION
US7064832B2 (en) 2003-02-26 2006-06-20 Delaware Capital Formation, Inc. Color and intensity measuring module for test of light emitting components by automated test equipment
US7236179B2 (en) * 2003-10-28 2007-06-26 Eastman Kodak Company Display device color channel reconstruction
US7354172B2 (en) * 2004-03-15 2008-04-08 Philips Solid-State Lighting Solutions, Inc. Methods and apparatus for controlled lighting based on a reference gamut
US20050259424A1 (en) * 2004-05-18 2005-11-24 Zampini Thomas L Ii Collimating and controlling light produced by light emitting diodes
US20060000963A1 (en) * 2004-06-30 2006-01-05 Ng Kee Y Light source calibration
DE102004047669A1 (en) * 2004-09-30 2006-04-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lighting device and method of control
CA2528946A1 (en) * 2004-12-03 2006-06-03 Splitfish Gameware Inc. Light gun system for plasma and lcd display
US7710369B2 (en) * 2004-12-20 2010-05-04 Philips Solid-State Lighting Solutions, Inc. Color management methods and apparatus for lighting devices
US7502112B2 (en) * 2004-12-23 2009-03-10 Brytech Inc. Colorimetric device and colour determination process
US7626345B2 (en) * 2005-02-23 2009-12-01 Dialight Corporation LED assembly, and a process for manufacturing the LED assembly
US7317288B2 (en) * 2005-09-02 2008-01-08 Au Optronics Corporation Controlling method and system for LED-based backlighting source
KR100714427B1 (en) * 2005-10-12 2007-05-07 삼성전자주식회사 Display apparatus and control method of the same
KR101006385B1 (en) * 2005-11-16 2011-01-11 삼성전자주식회사 Display apparatus and control method thereof
EP1949765B1 (en) * 2005-11-18 2017-07-12 Cree, Inc. Solid state lighting panels with variable voltage boost current sources
US8514210B2 (en) * 2005-11-18 2013-08-20 Cree, Inc. Systems and methods for calibrating solid state lighting panels using combined light output measurements
US7926300B2 (en) * 2005-11-18 2011-04-19 Cree, Inc. Adaptive adjustment of light output of solid state lighting panels
TWI293543B (en) * 2005-12-07 2008-02-11 Ind Tech Res Inst Illumination brightness and color control system and method thereof
US7551158B2 (en) * 2005-12-13 2009-06-23 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Display device and method for providing optical feedback
US7766511B2 (en) * 2006-04-24 2010-08-03 Integrated Illumination Systems LED light fixture
US20080012820A1 (en) * 2006-07-11 2008-01-17 Chun-Chieh Yang System and method for achieving desired operation illumination condition for light emitters
US7729941B2 (en) 2006-11-17 2010-06-01 Integrated Illumination Systems, Inc. Apparatus and method of using lighting systems to enhance brand recognition
US8013538B2 (en) 2007-01-26 2011-09-06 Integrated Illumination Systems, Inc. TRI-light
KR101350605B1 (en) * 2007-03-19 2014-01-10 엘지디스플레이 주식회사 Liquid crystal display device and method driving of the same
US8044899B2 (en) * 2007-06-27 2011-10-25 Hong Kong Applied Science and Technology Research Institute Company Limited Methods and apparatus for backlight calibration
US8742686B2 (en) * 2007-09-24 2014-06-03 Integrated Illumination Systems, Inc. Systems and methods for providing an OEM level networked lighting system
US8255487B2 (en) * 2008-05-16 2012-08-28 Integrated Illumination Systems, Inc. Systems and methods for communicating in a lighting network
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
KR101597822B1 (en) * 2008-11-25 2016-02-25 삼성전자주식회사 Method for calibrating a color temperature of a projector
US8585245B2 (en) 2009-04-23 2013-11-19 Integrated Illumination Systems, Inc. Systems and methods for sealing a lighting fixture
US8436556B2 (en) 2009-10-08 2013-05-07 Delos Living, Llc LED lighting system
TWI392859B (en) * 2009-11-18 2013-04-11 Univ Nat Formosa A novel method and equipment for measuring chromaticity coordinate and intensity of light
JP5410933B2 (en) * 2009-11-27 2014-02-05 三星電子株式会社 Visible light communication system and visible light communication method
CN101886973B (en) * 2010-06-23 2013-10-23 海洋王照明科技股份有限公司 Color coordinate testing device
TWI424151B (en) * 2010-10-08 2014-01-21 Chroma Ate Inc Method and system for chromaticity measurement using light source assembly
CN102455216B (en) * 2010-10-18 2014-06-25 致茂电子股份有限公司 Chroma measuring method and chroma measuring system for combined light source
US9066381B2 (en) 2011-03-16 2015-06-23 Integrated Illumination Systems, Inc. System and method for low level dimming
GB201106882D0 (en) 2011-04-26 2011-06-01 Univ Leicester Apparatus and method
US9967940B2 (en) 2011-05-05 2018-05-08 Integrated Illumination Systems, Inc. Systems and methods for active thermal management
US9521725B2 (en) 2011-07-26 2016-12-13 Hunter Industries, Inc. Systems and methods for providing power and data to lighting devices
US8710770B2 (en) 2011-07-26 2014-04-29 Hunter Industries, Inc. Systems and methods for providing power and data to lighting devices
US11917740B2 (en) 2011-07-26 2024-02-27 Hunter Industries, Inc. Systems and methods for providing power and data to devices
US10874003B2 (en) 2011-07-26 2020-12-22 Hunter Industries, Inc. Systems and methods for providing power and data to devices
US9609720B2 (en) 2011-07-26 2017-03-28 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
US8894437B2 (en) 2012-07-19 2014-11-25 Integrated Illumination Systems, Inc. Systems and methods for connector enabling vertical removal
BR112015004595A2 (en) 2012-08-28 2017-07-04 Delos Living Llc systems, methods and articles to improve the well-being 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
CN103090970B (en) * 2013-01-25 2016-04-13 深圳市摩西尔电子有限公司 A kind of Illuminant chromaticity data acquisition equipment and collecting method
CN106462913A (en) 2014-02-28 2017-02-22 戴尔斯生活有限责任公司 Systems, methods and articles for enhancing wellness associated with habitable environments
KR20160066125A (en) * 2014-12-01 2016-06-10 삼성디스플레이 주식회사 A liquid crystal display apparatus and Method of driving the same
EP3245631A4 (en) 2015-01-13 2018-06-27 Delos Living, LLC Systems, methods and articles for monitoring and enhancing human wellness
CN104849025A (en) * 2015-03-09 2015-08-19 中国计量学院 LED lamp on-line screening method based on brightness and color temperature test
US10228711B2 (en) 2015-05-26 2019-03-12 Hunter Industries, Inc. Decoder systems and methods for irrigation control
US10918030B2 (en) 2015-05-26 2021-02-16 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
CN105181301A (en) * 2015-09-23 2015-12-23 广州易诺光电科技有限公司 Light emitter detection method
WO2018039433A1 (en) 2016-08-24 2018-03-01 Delos Living Llc Systems, methods and articles for enhancing wellness associated with habitable environments
WO2019046580A1 (en) 2017-08-30 2019-03-07 Delos Living Llc Systems, methods and articles for assessing and/or improving health and well-being
WO2020055872A1 (en) 2018-09-14 2020-03-19 Delos Living Llc Systems and methods for air remediation
US11844163B2 (en) 2019-02-26 2023-12-12 Delos Living Llc Method and apparatus for lighting in an office environment
US11898898B2 (en) 2019-03-25 2024-02-13 Delos Living Llc Systems and methods for acoustic monitoring
CN110285949B (en) * 2019-07-05 2020-11-20 杭州罗莱迪思科技股份有限公司 LED color coordinate testing method
US10801714B1 (en) 2019-10-03 2020-10-13 CarJamz, Inc. Lighting device
KR102315369B1 (en) * 2020-02-03 2021-10-20 에이치비솔루션(주) Apparatus and method for estimating color coordinates of a quantum dot display
CN111458112B (en) * 2020-06-19 2020-09-15 武汉精立电子技术有限公司 Color coordinate measuring method, device, equipment and storage medium based on Gamma correction
CN112798235B (en) * 2021-03-19 2021-07-06 武汉精测电子集团股份有限公司 Method and device for detecting micro or miniature defects

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389265A (en) * 1965-05-03 1968-06-18 Du Pont Colorimeter for measuring the tristimulus coefficients of color in a laterally moving material
JPH10281873A (en) * 1997-04-02 1998-10-23 Rohm Co Ltd Reader
US6127783A (en) * 1998-12-18 2000-10-03 Philips Electronics North America Corp. LED luminaire with electronically adjusted color balance

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256131A (en) * 1976-07-14 1981-03-17 Sentrol Systems Ltd. Feedback color control system
JPS61243442A (en) * 1985-04-20 1986-10-29 Fuji Photo Film Co Ltd Method for detecting and processing image information
GB8528982D0 (en) * 1985-11-25 1986-01-02 Univ Liverpool Colour quantification system
JPH06149169A (en) * 1992-11-10 1994-05-27 Toshiba Corp Crt display device
US6095661A (en) * 1998-03-19 2000-08-01 Ppt Vision, Inc. Method and apparatus for an L.E.D. flashlight
IT1308289B1 (en) * 1999-07-08 2001-12-10 Targetti Sankey Spa CONTROLLED SPECTRUM LIGHTING DEVICE AND METHOD
US6448550B1 (en) * 2000-04-27 2002-09-10 Agilent Technologies, Inc. Method and apparatus for measuring spectral content of LED light source and control thereof
DE10031303A1 (en) * 2000-06-27 2002-01-10 Arnold & Richter Kg Lighting device with light emitting diodes (LED), lighting method and method for image recording with such an LED lighting device
US6441558B1 (en) * 2000-12-07 2002-08-27 Koninklijke Philips Electronics N.V. White LED luminary light control system
KR20020067189A (en) * 2001-02-15 2002-08-22 삼성에스디아이 주식회사 Method for controlling image signal
US6510995B2 (en) * 2001-03-16 2003-01-28 Koninklijke Philips Electronics N.V. RGB LED based light driver using microprocessor controlled AC distributed power system
US6576881B2 (en) * 2001-04-06 2003-06-10 Koninklijke Philips Electronics N.V. Method and system for controlling a light source
US6992803B2 (en) * 2001-05-08 2006-01-31 Koninklijke Philips Electronics N.V. RGB primary color point identification system and method
KR20030042514A (en) * 2001-11-23 2003-06-02 삼성전기주식회사 Digital Dynamic Convergence Control System of Display Device at CRT Type

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389265A (en) * 1965-05-03 1968-06-18 Du Pont Colorimeter for measuring the tristimulus coefficients of color in a laterally moving material
JPH10281873A (en) * 1997-04-02 1998-10-23 Rohm Co Ltd Reader
US6127783A (en) * 1998-12-18 2000-10-03 Philips Electronics North America Corp. LED luminaire with electronically adjusted color balance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *

Also Published As

Publication number Publication date
WO2002090909A2 (en) 2002-11-14
EP1393029A2 (en) 2004-03-03
JP4067973B2 (en) 2008-03-26
KR100865222B1 (en) 2008-10-23
KR20030026311A (en) 2003-03-31
JP2004528566A (en) 2004-09-16
US6992803B2 (en) 2006-01-31
EP1393029B1 (en) 2008-12-17
CN1471630A (en) 2004-01-28
US20030011832A1 (en) 2003-01-16
CN100392367C (en) 2008-06-04
DE60230406D1 (en) 2009-01-29

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