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WO2008102707A1 - 光源装置および液晶表示装置 - Google Patents

光源装置および液晶表示装置 Download PDF

Info

Publication number
WO2008102707A1
WO2008102707A1 PCT/JP2008/052556 JP2008052556W WO2008102707A1 WO 2008102707 A1 WO2008102707 A1 WO 2008102707A1 JP 2008052556 W JP2008052556 W JP 2008052556W WO 2008102707 A1 WO2008102707 A1 WO 2008102707A1
Authority
WO
WIPO (PCT)
Prior art keywords
partially
reception signal
light source
period
light
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2008/052556
Other languages
English (en)
French (fr)
Inventor
Mitsuru Okabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to US12/449,733 priority Critical patent/US20100097412A1/en
Priority to EP08711386A priority patent/EP2120511A1/en
Publication of WO2008102707A1 publication Critical patent/WO2008102707A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G09G3/3413—Details of control of colour illumination sources
    • 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]
    • H05B45/40—Details of LED load circuits
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F55/00—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto
    • H10F55/10—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto wherein the radiation-sensitive semiconductor devices control the electric light source, e.g. image converters, image amplifiers or image storage devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • 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
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time 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
    • 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
    • G09G2360/141—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light conveying information used for selecting or modulating the light emitting or modulating element
    • 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

　部分点灯動作を行う光源装置において照明光の検出精度を向上させることが可能な光源装置を提供する。点灯数可変動作モードの場合、バックライト制御部１２が、１フレーム期間内に発生する複数のパルス信号のうちの直前パルス信号のパルス幅ΔＴが所定の閾値Ｔ２（Ｔth）以下となるように制御する。部分点灯部４の発光輝度が高い場合（複数のパルス信号の幅がそれぞれ広い場合）であっても、部分点灯期間Δｔ１で得られた受光信号と全体点灯期間Δｔ４で得られた受光信号とが互いに干渉してしまうのが回避される。よって、取得した受光信号の検出タイミングによってその信号値が変動してしまうのが回避され、検出精度が向上する。 
PCT/JP2008/052556 2007-02-23 2008-02-15 光源装置および液晶表示装置 Ceased WO2008102707A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/449,733 US20100097412A1 (en) 2007-02-23 2008-02-15 Light source device and liquid crystal display unit
EP08711386A EP2120511A1 (en) 2007-02-23 2008-02-15 Light source device and liquid crystal display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007044300A JP4803069B2 (ja) 2007-02-23 2007-02-23 光源装置および液晶表示装置
JP2007-044300 2007-02-23

Publications (1)

Publication Number Publication Date
WO2008102707A1 true WO2008102707A1 (ja) 2008-08-28

Family

ID=39709984

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/052556 Ceased WO2008102707A1 (ja) 2007-02-23 2008-02-15 光源装置および液晶表示装置

Country Status (7)

Country Link
US (1) US20100097412A1 (ja)
EP (1) EP2120511A1 (ja)
JP (1) JP4803069B2 (ja)
KR (1) KR20090114379A (ja)
CN (1) CN101617567A (ja)
TW (1) TW200901825A (ja)
WO (1) WO2008102707A1 (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009288465A (ja) * 2008-05-29 2009-12-10 Funai Electric Co Ltd バックライト装置及び液晶表示装置
US8217889B2 (en) * 2008-11-10 2012-07-10 Apple Inc. Pulse-width modulation control for backlighting of a video display
US8143791B2 (en) * 2008-12-12 2012-03-27 Palo Alto Research Center Incorporated Control system for light-emitting device
JP2011075919A (ja) * 2009-09-30 2011-04-14 Casio Computer Co Ltd 光源装置、投影装置及び投影方法
WO2011121846A1 (ja) * 2010-03-29 2011-10-06 シャープ株式会社 電力制御装置、バックライトユニット、および液晶表示装置
KR101297459B1 (ko) * 2010-12-30 2013-08-16 주식회사 팬택 휴대용 단말기의 3차원 인터페이스 장치 및 방법
KR101802999B1 (ko) * 2011-02-07 2017-11-30 삼성디스플레이 주식회사 액정 표시 장치의 구동 방법
US20140246982A1 (en) * 2011-04-22 2014-09-04 Sharp Kabushiki Kaisha Display device, and display device control method
US9521721B2 (en) * 2011-09-23 2016-12-13 Martin Professional A/S Method of controling illumination device based on current-voltage model
JP5943707B2 (ja) * 2012-05-25 2016-07-05 三菱電機株式会社 画像表示装置
JP5950692B2 (ja) * 2012-05-25 2016-07-13 三菱電機株式会社 立体画像表示装置
CN103854596A (zh) * 2012-11-29 2014-06-11 利亚德光电股份有限公司 Led显示器
JP2013157630A (ja) * 2013-04-18 2013-08-15 Mitsubishi Electric Corp 発光素子駆動装置
JP6501581B2 (ja) * 2015-03-26 2019-04-17 キヤノン株式会社 光源装置、画像表示装置、及び、光源装置の制御方法
AT518010B1 (de) 2015-10-23 2017-10-15 Zkw Group Gmbh Überwachunsvorrichtung zur Überwachung des Betriebszustandes eines Laser-Fahzeugscheinwerfers sowie Fahrzeugscheinwerfer
WO2018176405A1 (zh) * 2017-03-31 2018-10-04 深圳市柔宇科技有限公司 一种显示屏的控制方法及装置
US11145260B2 (en) * 2019-05-28 2021-10-12 Apple Inc. Display backlighting systems and methods for adaptive pulse width modulation and modulo pulse width modulation
CN112017601B (zh) * 2019-05-28 2023-09-15 苹果公司 电子设备和控制电路
CN111739477B (zh) * 2020-06-30 2022-09-13 昆山龙腾光电股份有限公司 调光电路和显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001312241A (ja) * 2000-05-02 2001-11-09 Sharp Corp 光変調情報表示装置および照明制御装置
JP2002251172A (ja) * 2001-02-27 2002-09-06 Fujitsu General Ltd リモート・コントロール装置
JP2006145886A (ja) 2004-11-19 2006-06-08 Sony Corp 表示装置及びその制御方法
JP2006243283A (ja) 2005-03-02 2006-09-14 Sony Corp 照明装置及び表示装置
JP2006260927A (ja) * 2005-03-17 2006-09-28 Sony Corp 照明装置、照明装置の制御方法および表示装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4529573B2 (ja) * 2004-07-28 2010-08-25 三菱電機株式会社 面状光源装置及び液晶表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001312241A (ja) * 2000-05-02 2001-11-09 Sharp Corp 光変調情報表示装置および照明制御装置
JP2002251172A (ja) * 2001-02-27 2002-09-06 Fujitsu General Ltd リモート・コントロール装置
JP2006145886A (ja) 2004-11-19 2006-06-08 Sony Corp 表示装置及びその制御方法
JP2006243283A (ja) 2005-03-02 2006-09-14 Sony Corp 照明装置及び表示装置
JP2006260927A (ja) * 2005-03-17 2006-09-28 Sony Corp 照明装置、照明装置の制御方法および表示装置

Also Published As

Publication number Publication date
TWI361021B (ja) 2012-03-21
JP2008210878A (ja) 2008-09-11
EP2120511A1 (en) 2009-11-18
JP4803069B2 (ja) 2011-10-26
KR20090114379A (ko) 2009-11-03
US20100097412A1 (en) 2010-04-22
TW200901825A (en) 2009-01-01
CN101617567A (zh) 2009-12-30

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