WO2007141732A3 - Led backlight for lcd with color uniformity recalibration over lifetime - Google Patents

Led backlight for lcd with color uniformity recalibration over lifetime Download PDF

Info

Publication number
WO2007141732A3
WO2007141732A3 PCT/IB2007/052107 IB2007052107W WO2007141732A3 WO 2007141732 A3 WO2007141732 A3 WO 2007141732A3 IB 2007052107 W IB2007052107 W IB 2007052107W WO 2007141732 A3 WO2007141732 A3 WO 2007141732A3
Authority
WO
WIPO (PCT)
Prior art keywords
cluster
backlight
color
white point
recalibration
Prior art date
Application number
PCT/IB2007/052107
Other languages
French (fr)
Other versions
WO2007141732A2 (en
Inventor
Martijn H R Lankhorst
Pieter Grootes
Robert F M Hendriks
Original Assignee
Koninkl Philips Electronics Nv
Philips Lumileds Lighting Co
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, Philips Lumileds Lighting Co filed Critical Koninkl Philips Electronics Nv
Priority to EP07736085A priority Critical patent/EP2047717A2/en
Publication of WO2007141732A2 publication Critical patent/WO2007141732A2/en
Publication of WO2007141732A3 publication Critical patent/WO2007141732A3/en

Links

Classifications

    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • 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
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Led Devices (AREA)

Abstract

An LED light source for LCD backlighting is described that recalibrates itself over time so that color and brightness uniformity across the backlight is maintained over the life of the backlight. The backlight contains clusters of red, green, and blue LEDs, each cluster generating a white point. In one embodiment, each color in a cluster has its own controllable driver so that the brightness of each color is a cluster is separately controllable. One or more optical sensors are arranged in the backlight, and the sensor signals are detected by processing circuitry to sense the light output of any LEDs that are energized in a single cluster. The measured white point and flux are compared to a stored target white point value and flux for that cluster. The currents to the RGB LEDs are then automatically adjusted to achieve the target level for each cluster. This process is applied to each cluster in sequence until the recalibration is complete. The recalibration takes place at various times over the lifetime of the backlight to offset the effects of LED degradation over time. Variations of this technique are also described.
PCT/IB2007/052107 2006-06-09 2007-06-05 Led backlight for lcd with color uniformity recalibration over lifetime WO2007141732A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07736085A EP2047717A2 (en) 2006-06-09 2007-06-05 Led backlight for lcd with color uniformity recalibration over lifetime

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/423,412 2006-06-09
US11/423,412 US7696964B2 (en) 2006-06-09 2006-06-09 LED backlight for LCD with color uniformity recalibration over lifetime

Publications (2)

Publication Number Publication Date
WO2007141732A2 WO2007141732A2 (en) 2007-12-13
WO2007141732A3 true WO2007141732A3 (en) 2008-04-24

Family

ID=38617302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/052107 WO2007141732A2 (en) 2006-06-09 2007-06-05 Led backlight for lcd with color uniformity recalibration over lifetime

Country Status (6)

Country Link
US (1) US7696964B2 (en)
EP (1) EP2047717A2 (en)
JP (1) JP2008034841A (en)
CN (1) CN101467490A (en)
TW (1) TW200809721A (en)
WO (1) WO2007141732A2 (en)

Families Citing this family (155)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5910854A (en) 1993-02-26 1999-06-08 Donnelly Corporation Electrochromic polymeric solid films, manufacturing electrochromic devices using such solid films, and processes for making such solid films and devices
US5668663A (en) 1994-05-05 1997-09-16 Donnelly Corporation Electrochromic mirrors and devices
US6891563B2 (en) * 1996-05-22 2005-05-10 Donnelly Corporation Vehicular vision system
US6172613B1 (en) 1998-02-18 2001-01-09 Donnelly Corporation Rearview mirror assembly incorporating vehicle information display
US8294975B2 (en) 1997-08-25 2012-10-23 Donnelly Corporation Automotive rearview mirror assembly
US6124886A (en) 1997-08-25 2000-09-26 Donnelly Corporation Modular rearview mirror assembly
US6326613B1 (en) 1998-01-07 2001-12-04 Donnelly Corporation Vehicle interior mirror assembly adapted for containing a rain sensor
US6445287B1 (en) 2000-02-28 2002-09-03 Donnelly Corporation Tire inflation assistance monitoring system
US8288711B2 (en) 1998-01-07 2012-10-16 Donnelly Corporation Interior rearview mirror system with forwardly-viewing camera and a control
US6693517B2 (en) 2000-04-21 2004-02-17 Donnelly Corporation Vehicle mirror assembly communicating wirelessly with vehicle accessories and occupants
US6477464B2 (en) 2000-03-09 2002-11-05 Donnelly Corporation Complete mirror-based global-positioning system (GPS) navigation solution
US6329925B1 (en) 1999-11-24 2001-12-11 Donnelly Corporation Rearview mirror assembly with added feature modular display
US7167796B2 (en) 2000-03-09 2007-01-23 Donnelly Corporation Vehicle navigation system for use with a telematics system
US7370983B2 (en) 2000-03-02 2008-05-13 Donnelly Corporation Interior mirror assembly with display
AU2001243285A1 (en) 2000-03-02 2001-09-12 Donnelly Corporation Video mirror systems incorporating an accessory module
US7581859B2 (en) 2005-09-14 2009-09-01 Donnelly Corp. Display device for exterior rearview mirror
AU2002251807A1 (en) 2001-01-23 2002-08-19 Donnelly Corporation Improved vehicular lighting system for a mirror assembly
WO2006124682A2 (en) 2005-05-16 2006-11-23 Donnelly Corporation Vehicle mirror assembly with indicia at reflective element
US7255451B2 (en) 2002-09-20 2007-08-14 Donnelly Corporation Electro-optic mirror cell
US6918674B2 (en) 2002-05-03 2005-07-19 Donnelly Corporation Vehicle rearview mirror system
EP1514246A4 (en) 2002-06-06 2008-04-16 Donnelly Corp Interior rearview mirror system with compass
US7329013B2 (en) 2002-06-06 2008-02-12 Donnelly Corporation Interior rearview mirror system with compass
WO2004026633A2 (en) 2002-09-20 2004-04-01 Donnelly Corporation Mirror reflective element assembly
US7310177B2 (en) 2002-09-20 2007-12-18 Donnelly Corporation Electro-optic reflective element assembly
US7446924B2 (en) 2003-10-02 2008-11-04 Donnelly Corporation Mirror reflective element assembly including electronic component
US7308341B2 (en) 2003-10-14 2007-12-11 Donnelly Corporation Vehicle communication system
JP2005321727A (en) 2004-05-11 2005-11-17 Sony Corp Backlight device and color liquid crystal display
JPWO2006009009A1 (en) 2004-07-15 2008-05-01 ソニー株式会社 Color filter and color liquid crystal display device
JP4815781B2 (en) * 2004-10-20 2011-11-16 ソニー株式会社 Color liquid crystal display device and backlight device
EP1949666B1 (en) 2005-11-01 2013-07-17 Magna Mirrors of America, Inc. Interior rearview mirror with display
JP5332155B2 (en) * 2006-09-20 2013-11-06 セイコーエプソン株式会社 Image display device and image display method
JP2008076899A (en) 2006-09-22 2008-04-03 Sony Corp Backlight device and display device
EP2082620B1 (en) * 2006-11-10 2010-07-28 Koninklijke Philips Electronics N.V. Method and driver for determining drive values for driving a lighting device
JP4285532B2 (en) 2006-12-01 2009-06-24 ソニー株式会社 Backlight control device, backlight control method, and liquid crystal display device
JP2010513944A (en) * 2006-12-13 2010-04-30 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 Light-emitting diode control method and corresponding optical sensor array, backlight, and liquid crystal display
US20080174607A1 (en) * 2007-01-24 2008-07-24 Ali Iranli Systems and methods for reducing power consumption in a device through a content adaptive display
JP4264560B2 (en) * 2007-01-24 2009-05-20 ソニー株式会社 Backlight device, backlight control method, and liquid crystal display device
KR101350605B1 (en) * 2007-03-19 2014-01-10 엘지디스플레이 주식회사 Liquid crystal display device and method driving of the same
JP2009014746A (en) * 2007-06-29 2009-01-22 Toshiba Corp Light emission control device and liquid crystal display device including the same
KR101335994B1 (en) * 2007-07-19 2013-12-04 삼성전자주식회사 Backlight unit and display apparatus of the same
KR101437014B1 (en) * 2007-07-20 2014-11-04 삼성디스플레이 주식회사 Light source module for display device and display device having the same
CN101160006A (en) * 2007-11-23 2008-04-09 京东方科技集团股份有限公司 LED backlight source color management system and method
US8217887B2 (en) * 2008-01-23 2012-07-10 Atmel Corporation System and method for backlight control for an electronic display
US20090189841A1 (en) * 2008-01-24 2009-07-30 Himax Technologies Limited Open-loop color management for light emitting diode backlight module
WO2009092443A1 (en) * 2008-01-24 2009-07-30 Osram Gesellschaft mit beschränkter Haftung Method and circuit arrangement for the two-stage control of semi-conductor light sources
US8154418B2 (en) 2008-03-31 2012-04-10 Magna Mirrors Of America, Inc. Interior rearview mirror system
CA2665561C (en) * 2008-05-13 2016-01-26 Dolby Laboratories Licensing Corporation Array scaling for high dynamic range backlight displays and other devices
JP4623137B2 (en) * 2008-05-14 2011-02-02 富士ゼロックス株式会社 Color processing apparatus, method and program
US8125163B2 (en) 2008-05-21 2012-02-28 Manufacturing Resources International, Inc. Backlight adjustment system
US20090310066A1 (en) * 2008-06-11 2009-12-17 Manufacturing Resources International, Inc. LED tile Luminance control circuitry and display containing the same
CN101359451B (en) * 2008-06-12 2012-10-10 康佳集团股份有限公司 LCD, implementing process thereof and backlight system of RGB LED
KR101482077B1 (en) * 2008-06-17 2015-01-14 삼성디스플레이 주식회사 Method of driving a light source, back light assembly for performing the method and display apparatus having the back light assembly
JP5261056B2 (en) * 2008-07-28 2013-08-14 パナソニック株式会社 Backlight device
TWI388222B (en) * 2008-08-20 2013-03-01 Chunghwa Picture Tubes Ltd Device for adjusting white balance in a field sequential display and method thereof
US9082673B2 (en) 2009-10-05 2015-07-14 Zena Technologies, Inc. Passivated upstanding nanostructures and methods of making the same
US9299866B2 (en) 2010-12-30 2016-03-29 Zena Technologies, Inc. Nanowire array based solar energy harvesting device
US8866065B2 (en) 2010-12-13 2014-10-21 Zena Technologies, Inc. Nanowire arrays comprising fluorescent nanowires
US8274039B2 (en) 2008-11-13 2012-09-25 Zena Technologies, Inc. Vertical waveguides with various functionality on integrated circuits
US9515218B2 (en) 2008-09-04 2016-12-06 Zena Technologies, Inc. Vertical pillar structured photovoltaic devices with mirrors and optical claddings
US8229255B2 (en) 2008-09-04 2012-07-24 Zena Technologies, Inc. Optical waveguides in image sensors
US9478685B2 (en) 2014-06-23 2016-10-25 Zena Technologies, Inc. Vertical pillar structured infrared detector and fabrication method for the same
US8791470B2 (en) 2009-10-05 2014-07-29 Zena Technologies, Inc. Nano structured LEDs
US8546742B2 (en) 2009-06-04 2013-10-01 Zena Technologies, Inc. Array of nanowires in a single cavity with anti-reflective coating on substrate
US8735797B2 (en) 2009-12-08 2014-05-27 Zena Technologies, Inc. Nanowire photo-detector grown on a back-side illuminated image sensor
US8507840B2 (en) 2010-12-21 2013-08-13 Zena Technologies, Inc. Vertically structured passive pixel arrays and methods for fabricating the same
US8269985B2 (en) 2009-05-26 2012-09-18 Zena Technologies, Inc. Determination of optimal diameters for nanowires
US8748799B2 (en) 2010-12-14 2014-06-10 Zena Technologies, Inc. Full color single pixel including doublet or quadruplet si nanowires for image sensors
US8889455B2 (en) 2009-12-08 2014-11-18 Zena Technologies, Inc. Manufacturing nanowire photo-detector grown on a back-side illuminated image sensor
US8384007B2 (en) 2009-10-07 2013-02-26 Zena Technologies, Inc. Nano wire based passive pixel image sensor
US8835831B2 (en) 2010-06-22 2014-09-16 Zena Technologies, Inc. Polarized light detecting device and fabrication methods of the same
US9000353B2 (en) 2010-06-22 2015-04-07 President And Fellows Of Harvard College Light absorption and filtering properties of vertically oriented semiconductor nano wires
US9343490B2 (en) 2013-08-09 2016-05-17 Zena Technologies, Inc. Nanowire structured color filter arrays and fabrication method of the same
US9406709B2 (en) 2010-06-22 2016-08-02 President And Fellows Of Harvard College Methods for fabricating and using nanowires
US8299472B2 (en) 2009-12-08 2012-10-30 Young-June Yu Active pixel sensor with nanowire structured photodetectors
US8519379B2 (en) 2009-12-08 2013-08-27 Zena Technologies, Inc. Nanowire structured photodiode with a surrounding epitaxially grown P or N layer
US8890271B2 (en) 2010-06-30 2014-11-18 Zena Technologies, Inc. Silicon nitride light pipes for image sensors
US20160053977A1 (en) 2008-09-24 2016-02-25 B/E Aerospace, Inc. Flexible led lighting element
US8531381B2 (en) * 2008-09-30 2013-09-10 Sharp Laboratories Of America, Inc. Methods and systems for LED backlight white balance
JP2010113229A (en) * 2008-11-07 2010-05-20 Sony Corp Display device and electronic product
EP2357679B1 (en) 2008-11-14 2018-08-29 Samsung Electronics Co., Ltd. Vertical/horizontal light-emitting diode for semiconductor
US8143791B2 (en) * 2008-12-12 2012-03-27 Palo Alto Research Center Incorporated Control system for light-emitting device
US8324830B2 (en) * 2009-02-19 2012-12-04 Microsemi Corp.—Analog Mixed Signal Group Ltd. Color management for field-sequential LCD display
US8390562B2 (en) * 2009-03-24 2013-03-05 Apple Inc. Aging based white point control in backlights
TWI479470B (en) * 2009-04-09 2015-04-01 Innolux Corp Processing circuit and electronic system utilizing the same
EP2273851A3 (en) * 2009-06-24 2011-05-11 Nxp B.V. System and method for controlling LED cluster
WO2011002509A1 (en) 2009-06-30 2011-01-06 Tiecheng Alex Qiao Semiconductor nanocrystals used with led sources
KR101580921B1 (en) * 2009-08-14 2015-12-30 삼성디스플레이 주식회사 Display apparatus
JP6108834B2 (en) * 2009-09-25 2017-04-05 オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングＯｓｒａｍ Ｏｐｔｏ Ｓｅｍｉｃｏｎｄｕｃｔｏｒｓ ＧｍｂＨ Light emitting diode and method for manufacturing light emitting diode
KR101541474B1 (en) * 2009-12-25 2015-08-03 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Method for driving liquid crystal display device
DE102010000672A1 (en) * 2010-01-05 2011-07-07 Tridonic Ag Combined method for operating an electrical lamp and operating circuit
US8369083B2 (en) 2010-02-16 2013-02-05 Manufacturing Resources International, Inc. System and method for selectively engaging cooling fans within an electronic display
CA2794766C (en) * 2010-03-31 2018-09-25 Ats Automation Tooling Systems Inc. Light generator systems and methods
EP2556723B1 (en) * 2010-04-09 2018-06-06 eldoLAB Holding B.V. Driver system for driving a plurality of leds
CN101887706A (en) * 2010-06-29 2010-11-17 彩虹集团公司 LED backlight driving device and driving method thereof
TWI508624B (en) * 2010-09-01 2015-11-11 Au Optronics Corp Light emitting diode driving method
CN102072426B (en) * 2010-11-15 2012-08-29 映瑞光电科技(上海)有限公司 LED (Light Emitting Diode) lighting device and drive method thereof
US20120127210A1 (en) * 2010-11-19 2012-05-24 Au Optronics Corporation Random PWM Dimming Control for LED Backlight
JP2012119589A (en) * 2010-12-02 2012-06-21 Canon Inc Emission control device and control method
DE202010013087U1 (en) 2010-12-08 2011-02-24 Schott Ag display
US9443492B2 (en) * 2010-12-08 2016-09-13 Schott Ag Display with non-homogenous spectral transmission curve
DE102010061123A1 (en) 2010-12-08 2012-06-14 Schott Ag Seven-segment-display for glass ceramic hob, has lighting element comprising two primary color-lamps i.e. laser diodes, where primary color intensity of lamps is corrected for compensating chromaticity coordinate offset of substrate
TWI482140B (en) * 2011-04-29 2015-04-21 Geo Semiconductor Inc System and method for improving color and brightness uniformity of backlit lcd displays
WO2012167107A1 (en) * 2011-06-01 2012-12-06 B/E Aerospace, Inc. Vehicle led reading light grouping system and method
JP2013045740A (en) * 2011-08-26 2013-03-04 Canon Inc Luminaire and control method thereof
US9799306B2 (en) 2011-09-23 2017-10-24 Manufacturing Resources International, Inc. System and method for environmental adaptation of display characteristics
EP2767144B1 (en) * 2011-10-12 2017-01-11 B/E Aerospace, Inc. Methods, apparatus and articles of manufacture to calibrate lighting units
DE102011084590A1 (en) * 2011-10-17 2013-04-18 Zumtobel Lighting Gmbh lamp
CN104247560B (en) 2011-11-29 2016-08-17 Oled工厂有限责任公司 The method of the color dot of the light that adjustment is launched from Organic Light Emitting Diode OLED
DE102012209252A1 (en) * 2012-05-31 2013-12-05 Hella Kgaa Hueck & Co. Method for calibrating illumination device for illuminating e.g. interior arrangement elements in motor car, involves generating drive signal from output value to control respective light source of illumination device
US9271379B2 (en) 2012-11-16 2016-02-23 Apple Inc. Redundant operation of a backlight unit of a display device under open circuit or short circuit LED string conditions
US9076357B2 (en) 2012-11-16 2015-07-07 Apple Inc. Redundant operation of a backlight unit of a display device under a shorted LED condition
CN103000143B (en) * 2012-12-24 2014-12-10 成都芯进电子有限公司 Full-color light-emitting diode (LED) array gray level adjustment method and circuit
TWI490674B (en) * 2012-12-25 2015-07-01 Hergy Lighting Technology Corp Smart light emitting diode driving apparatus
KR20140113469A (en) * 2013-03-15 2014-09-24 포톤 다이나믹스, 인코포레이티드 Systems and methods for real-time monitoring of displays during inspection
US20140265868A1 (en) * 2013-03-15 2014-09-18 Lsi Industries, Inc Lighting Calibration for Intensity and Color
US9055283B2 (en) * 2013-03-15 2015-06-09 Apple Inc. Methods for display uniform gray tracking and gamma calibration
EP3061319A1 (en) * 2013-10-21 2016-08-31 Heinz Grether PC Brightness control for an led display
CN103680407A (en) * 2013-12-17 2014-03-26 青岛海信电器股份有限公司 Method, device and system for stabilizing luminance of organic electroluminescence display
JP6436336B2 (en) * 2014-02-13 2018-12-12 Ｔｉａｎｍａ Ｊａｐａｎ株式会社 Backlight light source device and liquid crystal display device
DE102014205301A1 (en) * 2014-03-21 2015-09-24 Zumtobel Lighting Gmbh Method for operating a lamp with a plurality of lamps or groups of lamps
US9594295B2 (en) 2014-03-26 2017-03-14 Seiko Epson Corporation Projector with a light modulator controlled based on a viewing angle characteristic of the light modulator
TWI514369B (en) 2014-05-29 2015-12-21 Au Optronics Corp Signal conversion method for display image
US9741956B2 (en) 2014-11-25 2017-08-22 Industrial Technology Research Institute Organic light-emitting diode apparatus
KR20160077314A (en) * 2014-12-22 2016-07-04 삼성디스플레이 주식회사 Light generaing device and display apparatus having the same
US10319408B2 (en) 2015-03-30 2019-06-11 Manufacturing Resources International, Inc. Monolithic display with separately controllable sections
US9924583B2 (en) 2015-05-14 2018-03-20 Mnaufacturing Resources International, Inc. Display brightness control based on location data
US10922736B2 (en) 2015-05-15 2021-02-16 Manufacturing Resources International, Inc. Smart electronic display for restaurants
US10269156B2 (en) 2015-06-05 2019-04-23 Manufacturing Resources International, Inc. System and method for blending order confirmation over menu board background
US10317728B2 (en) * 2015-06-08 2019-06-11 Sharp Kabushiki Kaisha Backlight device and liquid crystal display device including same
TWI574581B (en) * 2015-07-03 2017-03-11 點晶科技股份有限公司 Dot correction method and system for led display device
CN105430790B (en) * 2015-11-13 2019-12-27 欧普照明股份有限公司 Light mixing method for LED light source and linear lighting lamp
CN107533827B (en) * 2015-12-09 2020-04-28 华为技术有限公司 Backlight circuit, electronic device and backlight adjusting method
NL2016424B1 (en) 2016-03-11 2017-10-02 Eldolab Holding Bv Modular lighting application.
US10319271B2 (en) 2016-03-22 2019-06-11 Manufacturing Resources International, Inc. Cyclic redundancy check for electronic displays
US10788361B2 (en) 2016-04-06 2020-09-29 Apple Inc. Electronic device with obstruction-sensing color ambient light sensor
US20190237027A1 (en) * 2016-05-04 2019-08-01 Shenzhen China Star Optoelectronics Technology Co., Ltd Color temperature adjustment device and mthod of liquid crystal panel and liquid crystal panel
WO2017210317A1 (en) 2016-05-31 2017-12-07 Manufacturing Resources International, Inc. Electronic display remote image verification system and method
WO2018009917A1 (en) 2016-07-08 2018-01-11 Manufacturing Resources International, Inc. Controlling display brightness based on image capture device data
WO2018031717A2 (en) 2016-08-10 2018-02-15 Manufacturing Resources International, Inc. Dynamic dimming led backlight for lcd array
CN107068023A (en) * 2017-03-09 2017-08-18 北京京东方专用显示科技有限公司 Test backlight and its method of work, the test equipment of display panel
US10578658B2 (en) 2018-05-07 2020-03-03 Manufacturing Resources International, Inc. System and method for measuring power consumption of an electronic display assembly
US10782276B2 (en) 2018-06-14 2020-09-22 Manufacturing Resources International, Inc. System and method for detecting gas recirculation or airway occlusion
TWI662288B (en) * 2018-07-04 2019-06-11 友達光電股份有限公司 Display panel and detection method for light-emitting device substrate
CN108965846A (en) * 2018-09-07 2018-12-07 晶晨半导体(上海)股份有限公司 Adjust method, system and the display of white balance
CN110097850A (en) * 2019-05-05 2019-08-06 Oppo广东移动通信有限公司 Control method, control device, electronic equipment and computer readable storage medium
DE102019208347A1 (en) * 2019-06-07 2020-12-10 Volkswagen Aktiengesellschaft Method for operating a light-emitting diode module and light-emitting diode module
EP3787378B1 (en) * 2019-07-23 2024-04-10 BAE Systems Controls Inc. Direct drive ac led light
CN110853581B (en) * 2019-11-06 2021-03-16 深圳市华星光电半导体显示技术有限公司 Method for adjusting brightness of display panel and storage medium
CN110956925A (en) * 2019-12-25 2020-04-03 北京集创北方科技股份有限公司 Display device, electronic equipment and method for aging compensation of display panel
CN113053332B (en) * 2019-12-28 2022-04-22 Oppo广东移动通信有限公司 Backlight brightness adjusting method and device, electronic equipment and readable storage medium
US11526044B2 (en) 2020-03-27 2022-12-13 Manufacturing Resources International, Inc. Display unit with orientation based operation
KR20210155029A (en) * 2020-06-12 2021-12-22 삼성디스플레이 주식회사 Display device
TWI765593B (en) 2021-03-05 2022-05-21 友達光電股份有限公司 Display device and display method
CN113433730A (en) * 2021-06-24 2021-09-24 深圳市华星光电半导体显示技术有限公司 Liquid crystal display panel and display device
US11895362B2 (en) 2021-10-29 2024-02-06 Manufacturing Resources International, Inc. Proof of play for images displayed at electronic displays

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6633301B1 (en) * 1999-05-17 2003-10-14 Displaytech, Inc. RGB illuminator with calibration via single detector servo
US20030230991A1 (en) * 2002-06-17 2003-12-18 Koninklijke Philips Electronics N.V. LED-based white-light backlighting for electronic displays
US20050117190A1 (en) * 2002-03-01 2005-06-02 Kenichi Iwauchi Light emitting device and display unit using the light emitting device and reading device
EP1562170A1 (en) * 2003-04-01 2005-08-10 Hunet Inc. Display device adjusting method and display device
EP1619656A2 (en) * 2004-07-12 2006-01-25 Sony Corporation Display unit and backlight unit
US20060049781A1 (en) * 2004-09-07 2006-03-09 Joon-Chok Lee Use of a plurality of light sensors to regulate a direct-firing backlight for a display

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664158A (en) * 1995-04-25 1997-09-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Video display engineering and optimization system
US6825828B2 (en) * 2001-02-23 2004-11-30 General Digital Corporation Backlit LCD monitor
US6521879B1 (en) 2001-04-20 2003-02-18 Rockwell Collins, Inc. Method and system for controlling an LED backlight in flat panel displays wherein illumination monitoring is done outside the viewing area
US7855708B2 (en) 2001-09-05 2010-12-21 Honeywell International Inc. LED backlight luminance sensing for LCDs
BRPI0409513A (en) * 2003-04-25 2006-04-18 Visioneered Image Systems Inc led area light source for emitting light of a desired color, color video monitor and methods of determining the degradation of the representative led (s) of each color and of operating and calibrating the monitor
US7183727B2 (en) 2003-09-23 2007-02-27 Microsemi Corporation Optical and temperature feedbacks to control display brightness
KR100708147B1 (en) * 2005-03-14 2007-04-16 삼성전자주식회사 Light emitting cluster and direct light type back light unit and liquid display apparatus employing it
US20070019129A1 (en) * 2005-07-20 2007-01-25 Cree, Inc. Independent control of light emitting diodes for backlighting of color displays
US7317403B2 (en) * 2005-08-26 2008-01-08 Philips Lumileds Lighting Company, Llc LED light source for backlighting with integrated electronics
KR100780223B1 (en) * 2006-01-10 2007-11-27 삼성전기주식회사 Plane light source using leds to improve color stain characteristic and lcd backlight unit comprising the same
TW200737070A (en) * 2006-02-23 2007-10-01 Powerdsine Ltd Voltage controlled backlight driver
US7629751B2 (en) * 2006-03-03 2009-12-08 Chen-Jean Chou Electrical compensation and fault tolerant structure for light emitting device array
US20070262732A1 (en) * 2006-05-10 2007-11-15 Vastview Technology Inc. Method for controlling LED-based backlight module

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6633301B1 (en) * 1999-05-17 2003-10-14 Displaytech, Inc. RGB illuminator with calibration via single detector servo
US20050117190A1 (en) * 2002-03-01 2005-06-02 Kenichi Iwauchi Light emitting device and display unit using the light emitting device and reading device
US20030230991A1 (en) * 2002-06-17 2003-12-18 Koninklijke Philips Electronics N.V. LED-based white-light backlighting for electronic displays
EP1562170A1 (en) * 2003-04-01 2005-08-10 Hunet Inc. Display device adjusting method and display device
EP1619656A2 (en) * 2004-07-12 2006-01-25 Sony Corporation Display unit and backlight unit
US20060049781A1 (en) * 2004-09-07 2006-03-09 Joon-Chok Lee Use of a plurality of light sensors to regulate a direct-firing backlight for a display

Also Published As

Publication number Publication date
EP2047717A2 (en) 2009-04-15
CN101467490A (en) 2009-06-24
US7696964B2 (en) 2010-04-13
WO2007141732A2 (en) 2007-12-13
US20070285378A1 (en) 2007-12-13
TW200809721A (en) 2008-02-16
JP2008034841A (en) 2008-02-14

Similar Documents

Publication Publication Date Title
WO2007141732A3 (en) Led backlight for lcd with color uniformity recalibration over lifetime
US8203581B2 (en) Method of LED dimming using ambient light feedback
TWI310532B (en) A light source driving apparatus, a lighting system, and a method to improve the brightness uniformity in a light source
TW200734995A (en) Light emitting device and method for driving the same
US8120276B2 (en) Light source emitting mixed-colored light and method for controlling the color locus of such a light source
US7474294B2 (en) Use of a plurality of light sensors to regulate a direct-firing backlight for a display
TW200739492A (en) Image display device
TW200504634A (en) LED illumination source/display with individual LED brightness monitoring capability and calibration method
CN105276442B (en) Light source and display device
US20100128051A1 (en) Backlight device, backlight control method, and liquid crystal display device
TW200802277A (en) Lighting device with an array of controlled emitters
CN101755483A (en) Light emitting unit arrangement and control system and method thereof
EP1898677A3 (en) Colour feedback with single optical sensor
TW200643869A (en) Liquid-crystal display apparatus and electronic device
WO2008029548A1 (en) Illuminating device, backlight device, liquid crystal display device, method for controlling illuminating device and method for controlling liquid crystal display device
WO2009000182A1 (en) Methods and apparatus for backlight calibration
TW200605019A (en) Method and apparatus for power level control and/or contrast control in a display device
EP1988534A3 (en) Method for driving a light source and backlight assembly employing the same
TW200642118A (en) LED luminaire with optical feedback by image mapping on segmented light sensors
WO2006036693A3 (en) Uniformity and brightness measurement in oled displays
JP2010518457A (en) Two-color sub-pixel liquid crystal display device that does not partially use a filter, mobile electronic device comprising the device, and method of operating the device
TW200626827A (en) Lighting device and method for regulation
WO2009136344A3 (en) Device and method for controlling the color point of an led light source
JP2008524790A5 (en)
JP2009519579A (en) Illumination device and method for controlling the illumination device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780021429.7

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2007736085

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07736085

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU