EP2043079A3 - Video displaying apparatus with dynamic brightness control of the backlight - Google Patents

Video displaying apparatus with dynamic brightness control of the backlight Download PDF

Info

Publication number
EP2043079A3
EP2043079A3 EP08015642A EP08015642A EP2043079A3 EP 2043079 A3 EP2043079 A3 EP 2043079A3 EP 08015642 A EP08015642 A EP 08015642A EP 08015642 A EP08015642 A EP 08015642A EP 2043079 A3 EP2043079 A3 EP 2043079A3
Authority
EP
European Patent Office
Prior art keywords
apl
video signal
input video
displaying apparatus
change amount
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.)
Withdrawn
Application number
EP08015642A
Other languages
German (de)
French (fr)
Other versions
EP2043079A2 (en
Inventor
Kohichi Takaku
Tetsuo Ikeyama
Hideto Yagisawa
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Publication of EP2043079A2 publication Critical patent/EP2043079A2/en
Publication of EP2043079A3 publication Critical patent/EP2043079A3/en
Withdrawn legal-status Critical Current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
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment 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
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

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)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Liquid Crystal (AREA)

Abstract

A video displaying apparatus is provided that can change light-modulation rate of a backlight source in accordance with changes in a feature quantity of an input video signal based on a difference between times required for the light adaptation and the dark adaptation. A video displaying apparatus includes a liquid crystal panel (3) that displays an input video signal, a backlight source (9) that applies light to the liquid crystal panel (3), an APL detecting part (6) that detects APL of the input video signal, and a control microcomputer (8) that variably controls a change amount of emission luminance of the backlight source (9) for each predetermined time based on the detected APL. The control microcomputer (8) performs control such that the change amount for the APL of the input video signal changing to a higher quantity becomes greater than the change amount for the APL of the input video signal changing to a lower quantity.
EP08015642A 2007-09-28 2008-09-04 Video displaying apparatus with dynamic brightness control of the backlight Withdrawn EP2043079A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007253684A JP2009086133A (en) 2007-09-28 2007-09-28 Video display apparatus

Publications (2)

Publication Number Publication Date
EP2043079A2 EP2043079A2 (en) 2009-04-01
EP2043079A3 true EP2043079A3 (en) 2010-03-17

Family

ID=40056181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08015642A Withdrawn EP2043079A3 (en) 2007-09-28 2008-09-04 Video displaying apparatus with dynamic brightness control of the backlight

Country Status (4)

Country Link
EP (1) EP2043079A3 (en)
JP (1) JP2009086133A (en)
CN (1) CN101399011B (en)
BR (1) BRPI0803562A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011013422A (en) * 2009-07-01 2011-01-20 Mitsubishi Electric Corp Image quality adjusting apparatus
JP5516583B2 (en) * 2009-07-16 2014-06-11 富士通株式会社 Display device and control method
JP5562931B2 (en) * 2010-02-26 2014-07-30 シャープ株式会社 Content reproduction apparatus, television receiver, content reproduction method, content reproduction program, and recording medium
JP4902000B2 (en) 2010-02-26 2012-03-21 シャープ株式会社 Content reproduction apparatus, television receiver, content reproduction method, content reproduction program, and recording medium
CN103377636B (en) * 2010-05-25 2015-06-17 友达光电股份有限公司 Method for regulating back light brightness
CN101859546B (en) * 2010-05-25 2013-06-19 友达光电股份有限公司 Method for adjusting brightness of backlight source
JP2012013858A (en) * 2010-06-30 2012-01-19 Fujitsu Ten Ltd Display control device, display device and display control method
JP5270730B2 (en) * 2011-08-03 2013-08-21 シャープ株式会社 Video display device
WO2013054728A1 (en) 2011-10-11 2013-04-18 ソニー株式会社 Head-mounted display and display control method
JP6051605B2 (en) * 2012-06-13 2016-12-27 ソニー株式会社 Display device, display control method, and program
JP6261240B2 (en) * 2013-09-04 2018-01-17 キヤノン株式会社 Image processing apparatus and control method thereof
JP6516302B2 (en) * 2014-09-22 2019-05-22 Ｎｅｃディスプレイソリューションズ株式会社 Image display apparatus and light source light control method
JP6479401B2 (en) * 2014-10-14 2019-03-06 シャープ株式会社 Display device, control method of display device, and control program
JP2016090773A (en) * 2014-11-04 2016-05-23 株式会社ソニー・コンピュータエンタテインメント Head-mounted display and brightness adjustment method
KR102399669B1 (en) 2015-10-15 2022-05-19 삼성전자주식회사 Device and method to adjust brightness of display
CN105657301B (en) * 2016-02-22 2019-06-11 深圳市华星光电技术有限公司 Show the method and device of image
JP6758891B2 (en) * 2016-04-11 2020-09-23 キヤノン株式会社 Image display device and image display method
CN106128372A (en) * 2016-09-14 2016-11-16 广州创维平面显示科技有限公司 The control method of a kind of direct-light-type backlight, control system and LCD TV
JP7064889B2 (en) * 2018-01-16 2022-05-11 株式会社ジャパンディスプレイ Display device
JP7114993B2 (en) * 2018-03-30 2022-08-09 株式会社リコー DISPLAY DEVICE, DISPLAY SYSTEM, MOBILE, DISPLAY BRIGHTNESS CONTROL METHOD AND PROGRAM
JP6746855B2 (en) * 2018-09-28 2020-08-26 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ Imaging device, control method, and program

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020021292A1 (en) * 2000-05-08 2002-02-21 Yukihiko Sakashita Display apparatus and image signal processing apparatus
US20030201968A1 (en) * 2002-03-25 2003-10-30 Motomitsu Itoh Image display device and image display method
WO2005022925A1 (en) * 2003-08-28 2005-03-10 Koninklijke Philips Electronics N.V. Method and system for controlling dynamic contrast for in a display system

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JPH05127608A (en) 1991-11-01 1993-05-25 Canon Inc Liquid crystal display device
JPH0619444A (en) * 1992-07-02 1994-01-28 Hitachi Ltd Information processor
JP2751847B2 (en) * 1993-12-28 1998-05-18 日本電気株式会社 Display device
JP3215400B1 (en) * 1999-05-10 2001-10-02 松下電器産業株式会社 Image display device and image display method
JP2002357810A (en) * 2001-05-31 2002-12-13 Matsushita Electric Ind Co Ltd Video display device and its method
JP3495362B2 (en) * 2001-04-25 2004-02-09 松下電器産業株式会社 Image display device and image display method
CN100358001C (en) * 2002-03-07 2007-12-26 夏普株式会社 Display apparatus
JP4250978B2 (en) * 2003-03-03 2009-04-08 ヤマハ株式会社 projector
JP4619160B2 (en) * 2005-03-17 2011-01-26 シャープ株式会社 Image display device and image display method
JP2006285064A (en) * 2005-04-04 2006-10-19 Matsushita Electric Ind Co Ltd Image display apparatus
CN1996103A (en) * 2006-08-18 2007-07-11 深圳创维－Rgb电子有限公司 Energy-saving circuit for use in liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020021292A1 (en) * 2000-05-08 2002-02-21 Yukihiko Sakashita Display apparatus and image signal processing apparatus
US20030201968A1 (en) * 2002-03-25 2003-10-30 Motomitsu Itoh Image display device and image display method
WO2005022925A1 (en) * 2003-08-28 2005-03-10 Koninklijke Philips Electronics N.V. Method and system for controlling dynamic contrast for in a display system

Also Published As

Publication number Publication date
EP2043079A2 (en) 2009-04-01
CN101399011B (en) 2011-06-15
JP2009086133A (en) 2009-04-23
BRPI0803562A2 (en) 2009-06-02
CN101399011A (en) 2009-04-01

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