WO2008096469A1 - Display device - Google Patents

Display device Download PDF

Info

Publication number
WO2008096469A1
WO2008096469A1 PCT/JP2007/067632 JP2007067632W WO2008096469A1 WO 2008096469 A1 WO2008096469 A1 WO 2008096469A1 JP 2007067632 W JP2007067632 W JP 2007067632W WO 2008096469 A1 WO2008096469 A1 WO 2008096469A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
areas
illumination
area
brightness
Prior art date
Application number
PCT/JP2007/067632
Other languages
French (fr)
Japanese (ja)
Inventor
Kazuhiro Uehara
Original Assignee
Sharp Kabushiki Kaisha
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 Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2008096469A1 publication Critical patent/WO2008096469A1/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
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/58—Arrangements comprising a monitoring photodetector
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

A liquid crystal panel (or a display unit) (3) has a plurality of display areas, and a back light device (or a back light unit) (2) is set with a plurality of illumination areas for making the lights of light emitting diodes (or light sources) (4) individually incident on the display areas. Also disposed are an area brightness detecting unit (27) for detecting the brightness value of each of the illumination areas, and an aging change discriminating unit (28) for discriminating the aging degree of the light emitting diodes (4) contained in each illumination area, by using the detection result from the area brightness detecting unit (27), thereby to correct the brightness values of the corresponding illumination areas on the basis of the discrimination result.
PCT/JP2007/067632 2007-02-07 2007-09-11 Display device WO2008096469A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-028368 2007-02-07
JP2007028368 2007-02-07

Publications (1)

Publication Number Publication Date
WO2008096469A1 true WO2008096469A1 (en) 2008-08-14

Family

ID=39681385

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/067632 WO2008096469A1 (en) 2007-02-07 2007-09-11 Display device

Country Status (1)

Country Link
WO (1) WO2008096469A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009015265A (en) * 2007-07-09 2009-01-22 Nec Lcd Technologies Ltd Backlight driving method and device for liquid crystal display device, and liquid crystal display device
JP2010066465A (en) * 2008-09-10 2010-03-25 Mitsubishi Electric Corp Picture display device
JP2011075800A (en) * 2009-09-30 2011-04-14 Sharp Corp Liquid crystal display device
JP2013101976A (en) * 2011-02-08 2013-05-23 Canon Inc Backlight device and control method thereof, image display device
WO2016019599A1 (en) * 2014-08-08 2016-02-11 深圳市华星光电技术有限公司 Method and system for improving brightness uniformity of 3d liquid crystal display during 3d display

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000294026A (en) * 1999-04-09 2000-10-20 Matsushita Electric Ind Co Ltd Backlight device
JP2004286971A (en) * 2003-03-20 2004-10-14 Mitsubishi Electric Corp Picture display apparatus and picture display method
JP2005331644A (en) * 2004-05-19 2005-12-02 Mitsubishi Electric Corp Image display device and image display method
JP2006040764A (en) * 2004-07-28 2006-02-09 Mitsubishi Electric Corp Surface light source and liquid crystal display
JP2006303016A (en) * 2005-04-18 2006-11-02 Rohm Co Ltd Lighting device and display unit using the same
JP2006330222A (en) * 2005-05-25 2006-12-07 Sharp Corp Liquid crystal display device and its temporal deterioration correcting method
JP2007052105A (en) * 2005-08-16 2007-03-01 Sharp Corp Display device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000294026A (en) * 1999-04-09 2000-10-20 Matsushita Electric Ind Co Ltd Backlight device
JP2004286971A (en) * 2003-03-20 2004-10-14 Mitsubishi Electric Corp Picture display apparatus and picture display method
JP2005331644A (en) * 2004-05-19 2005-12-02 Mitsubishi Electric Corp Image display device and image display method
JP2006040764A (en) * 2004-07-28 2006-02-09 Mitsubishi Electric Corp Surface light source and liquid crystal display
JP2006303016A (en) * 2005-04-18 2006-11-02 Rohm Co Ltd Lighting device and display unit using the same
JP2006330222A (en) * 2005-05-25 2006-12-07 Sharp Corp Liquid crystal display device and its temporal deterioration correcting method
JP2007052105A (en) * 2005-08-16 2007-03-01 Sharp Corp Display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009015265A (en) * 2007-07-09 2009-01-22 Nec Lcd Technologies Ltd Backlight driving method and device for liquid crystal display device, and liquid crystal display device
US8456412B2 (en) 2007-07-09 2013-06-04 Nlt Technologies, Ltd. Method of driving the backlight of a liquid crystal display device being effective in reducing an influence by light leaked from other light-emitting regions to one light-emitting region
US8665205B2 (en) 2007-07-09 2014-03-04 Nlt Technologies, Ltd. Method of driving the backlight of a light-emitting region of an LCD device to reduce the influence of light leaked from neighboring light-emitting regions
JP2010066465A (en) * 2008-09-10 2010-03-25 Mitsubishi Electric Corp Picture display device
JP2011075800A (en) * 2009-09-30 2011-04-14 Sharp Corp Liquid crystal display device
JP2013101976A (en) * 2011-02-08 2013-05-23 Canon Inc Backlight device and control method thereof, image display device
WO2016019599A1 (en) * 2014-08-08 2016-02-11 深圳市华星光电技术有限公司 Method and system for improving brightness uniformity of 3d liquid crystal display during 3d display
US9892694B2 (en) 2014-08-08 2018-02-13 Shenzhen China Star Optoelectronics Technology Co., Ltd. Method and system for improving luminance uniformity of 3D liquid crystal display in 3D displaying

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