WO2009008190A1 - バックライトユニット - Google Patents

バックライトユニット Download PDF

Info

Publication number
WO2009008190A1
WO2009008190A1 PCT/JP2008/053374 JP2008053374W WO2009008190A1 WO 2009008190 A1 WO2009008190 A1 WO 2009008190A1 JP 2008053374 W JP2008053374 W JP 2008053374W WO 2009008190 A1 WO2009008190 A1 WO 2009008190A1
Authority
WO
WIPO (PCT)
Prior art keywords
light emitting
emitting diode
backlight unit
light
lighting
Prior art date
Application number
PCT/JP2008/053374
Other languages
English (en)
French (fr)
Inventor
Tetsuya Hamada
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
Priority to CN200880014305.0A priority Critical patent/CN101675710B/zh
Priority to US12/599,533 priority patent/US8242700B2/en
Publication of WO2009008190A1 publication Critical patent/WO2009008190A1/ja

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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

　点灯動作を低輝度で行う際に、点灯動作を安定させることが可能なバックライトユニットを提供する。このバックライトユニット（１０）は、直列に接続された所定数の発光ダイオード（４、３１）をそれぞれ含む複数の発光ダイオード群（４ａ、４ｂ、３１ａ、３１ｂ、３１ｃ、３１ｄ）からなる光源と、調光信号に基づいて光源を点灯させる点灯回路（２０、４０）とを備えている。そして、点灯回路は、複数の発光ダイオード群の各々に別個に接続された複数の駆動回路部（２１ａ、２１ｂ、４１ａ、４１ｂ、４１ｃ、４１ｄ）を少なくとも有しているとともに、調光信号に基づいて、複数の発光ダイオード群の各々に含まれる全ての発光ダイオードを発光させたり、複数の発光ダイオード群のうちの所定の発光ダイオード群に含まれる発光ダイオードのみを発光させたりする。
PCT/JP2008/053374 2007-07-06 2008-02-27 バックライトユニット WO2009008190A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880014305.0A CN101675710B (zh) 2007-07-06 2008-02-27 背光单元
US12/599,533 US8242700B2 (en) 2007-07-06 2008-02-27 Backlight unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007177964 2007-07-06
JP2007-177964 2007-07-06

Publications (1)

Publication Number Publication Date
WO2009008190A1 true WO2009008190A1 (ja) 2009-01-15

Family

ID=40228380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/053374 WO2009008190A1 (ja) 2007-07-06 2008-02-27 バックライトユニット

Country Status (3)

Country Link
US (1) US8242700B2 (ja)
CN (1) CN101675710B (ja)
WO (1) WO2009008190A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102982773A (zh) * 2012-12-28 2013-03-20 杨伟 Led电视机
US8742471B2 (en) 2010-06-30 2014-06-03 Life Technologies Corporation Chemical sensor array with leakage compensation circuit
US8773477B2 (en) 2010-09-15 2014-07-08 Dolby Laboratories Licensing Corporation Method and apparatus for edge lit displays
EP2431654A3 (en) * 2010-09-17 2014-11-19 LG Innotek Co., Ltd. Lighting module and lighting apparatus including the same
US9563008B2 (en) 2010-09-17 2017-02-07 Lg Innotek Co., Ltd. Lighting module and lighting apparatus including the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011249087A (ja) * 2010-05-25 2011-12-08 Sanyo Electric Co Ltd 表示装置
CN102750912B (zh) * 2012-07-13 2015-04-08 冠捷显示科技（厦门）有限公司 Led背光动态控制装置及其控制方法
JP6673300B2 (ja) * 2017-06-28 2020-03-25 日亜化学工業株式会社 表示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6368887A (ja) * 1986-09-10 1988-03-28 富士通株式会社 面照光ｌｅｄユニツトの表示方法
JPS6370283A (ja) * 1986-09-11 1988-03-30 富士通株式会社 面照光ｌｅｄユニツトの表示方法
JPH09169134A (ja) * 1995-12-20 1997-06-30 Fuji Photo Film Co Ltd 光源装置
JP2004235070A (ja) * 2003-01-31 2004-08-19 Toshiba Lighting & Technology Corp 照明制御装置および照明装置
JP2007059282A (ja) * 2005-08-26 2007-03-08 Matsushita Electric Works Ltd 照明器具
JP2007141715A (ja) * 2005-11-21 2007-06-07 Sharp Corp Ｌｅｄバックライトユニット及び該ユニットを備える画像表示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007042758A (ja) 2005-08-01 2007-02-15 Harison Toshiba Lighting Corp Ｌｅｄ駆動装置
US7902771B2 (en) * 2006-11-21 2011-03-08 Exclara, Inc. Time division modulation with average current regulation for independent control of arrays of light emitting diodes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6368887A (ja) * 1986-09-10 1988-03-28 富士通株式会社 面照光ｌｅｄユニツトの表示方法
JPS6370283A (ja) * 1986-09-11 1988-03-30 富士通株式会社 面照光ｌｅｄユニツトの表示方法
JPH09169134A (ja) * 1995-12-20 1997-06-30 Fuji Photo Film Co Ltd 光源装置
JP2004235070A (ja) * 2003-01-31 2004-08-19 Toshiba Lighting & Technology Corp 照明制御装置および照明装置
JP2007059282A (ja) * 2005-08-26 2007-03-08 Matsushita Electric Works Ltd 照明器具
JP2007141715A (ja) * 2005-11-21 2007-06-07 Sharp Corp Ｌｅｄバックライトユニット及び該ユニットを備える画像表示装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8742471B2 (en) 2010-06-30 2014-06-03 Life Technologies Corporation Chemical sensor array with leakage compensation circuit
US8741680B2 (en) 2010-06-30 2014-06-03 Life Technologies Corporation Two-transistor pixel array
US8773477B2 (en) 2010-09-15 2014-07-08 Dolby Laboratories Licensing Corporation Method and apparatus for edge lit displays
EP2431654A3 (en) * 2010-09-17 2014-11-19 LG Innotek Co., Ltd. Lighting module and lighting apparatus including the same
US9563008B2 (en) 2010-09-17 2017-02-07 Lg Innotek Co., Ltd. Lighting module and lighting apparatus including the same
CN102982773A (zh) * 2012-12-28 2013-03-20 杨伟 Led电视机

Also Published As

Publication number Publication date
US20100237801A1 (en) 2010-09-23
CN101675710B (zh) 2013-03-27
US8242700B2 (en) 2012-08-14
CN101675710A (zh) 2010-03-17

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