JPH03198026A - Liquid crystal display device, back light control system, and information processor - Google Patents

Liquid crystal display device, back light control system, and information processor

Info

Publication number
JPH03198026A
JPH03198026A JP1342548A JP34254889A JPH03198026A JP H03198026 A JPH03198026 A JP H03198026A JP 1342548 A JP1342548 A JP 1342548A JP 34254889 A JP34254889 A JP 34254889A JP H03198026 A JPH03198026 A JP H03198026A
Authority
JP
Japan
Prior art keywords
back light
display
divided
part
liquid crystal
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.)
Pending
Application number
JP1342548A
Inventor
Shigenobu Ishimoto
Hiromichi Ito
Susumu Onodera
Original Assignee
Hitachi Ltd
Hitachi Video Eng Co Ltd
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 Hitachi Ltd, Hitachi Video Eng Co Ltd filed Critical Hitachi Ltd
Priority to JP1342548A priority Critical patent/JPH03198026A/en
Publication of JPH03198026A publication Critical patent/JPH03198026A/en
Application status is Pending legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0261Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0267Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
    • H04W52/027Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components by controlling a display operation or backlight unit
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks

Abstract

PURPOSE: To save a power by lighting only a part required for display by dividing a back light into plural areas, and enabling each divided area to be lit individually and/or luminance control to be applied.
CONSTITUTION: The back light 16 is divided into the plural areas, and also, each divided part is provided so as to be lit individually and/or to apply the luminance control individually. The necessity of the display is judged with the display mode of display data, and the control of the back light is performed by performing lights-out or luminance reduction on the divided part of the back light not being used and the divided part equivalent to a part where no display data exists on a screen with a set display mode. Thereby, all required data can be displayed, and the lights-out or reduction of liminance is applied to the back light corresponding to an unrequired display area, which reduces power consumption.
COPYRIGHT: (C)1991,JPO&Japio
JP1342548A 1989-12-27 1989-12-27 Liquid crystal display device, back light control system, and information processor Pending JPH03198026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1342548A JPH03198026A (en) 1989-12-27 1989-12-27 Liquid crystal display device, back light control system, and information processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1342548A JPH03198026A (en) 1989-12-27 1989-12-27 Liquid crystal display device, back light control system, and information processor

Publications (1)

Publication Number Publication Date
JPH03198026A true JPH03198026A (en) 1991-08-29

Family

ID=18354604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1342548A Pending JPH03198026A (en) 1989-12-27 1989-12-27 Liquid crystal display device, back light control system, and information processor

Country Status (1)

Country Link
JP (1) JPH03198026A (en)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592193A (en) * 1994-03-10 1997-01-07 Chunghwa Picture Tubes, Ltd. Backlighting arrangement for LCD display panel
WO1999026389A1 (en) * 1997-11-14 1999-05-27 Maxon Systems Inc. (London) Ltd. Mobile handheld telephone
EP1522988A2 (en) * 2003-10-09 2005-04-13 Pioneer Corporation Backlight device and display apparatus
US6956555B2 (en) 2000-05-02 2005-10-18 Sharp Kabushiki Kaisha Light modulation information display device and illumination control device
US6982686B2 (en) 2000-06-15 2006-01-03 Sharp Kabushiki Kaisha Liquid crystal display device, image display device, illumination device and emitter used therefore, driving method of liquid crystal display device, driving method of illumination device, and driving method of emitter
JP2006235464A (en) * 2005-02-28 2006-09-07 Nec Saitama Ltd Method for illuminating liquid crystal screen, and cellular phone
JP2006276113A (en) * 2005-03-28 2006-10-12 Sanyo Epson Imaging Devices Corp Electro-optical apparatus and electronic equipment
JP2007504509A (en) * 2003-09-03 2007-03-01 モトローラ・インコーポレイテッドMotorola Incorporated Selective illumination of regions of an electronic display
JP2007065050A (en) * 2005-08-29 2007-03-15 Kyocera Mita Corp Display device and image forming apparatus equipped with same
JP2007163562A (en) * 2005-12-09 2007-06-28 Sharp Corp Video display device and video display method
JP2007163733A (en) * 2005-12-13 2007-06-28 Sharp Corp Liquid crystal display device
JP2007310319A (en) * 2006-05-22 2007-11-29 Sharp Corp Display device
JP2009157045A (en) * 2007-12-26 2009-07-16 Lenovo Singapore Pte Ltd Display arrangement and its power control program
US7742031B2 (en) 1999-10-08 2010-06-22 Sharp Kabushiki Kaisha Display device and light source
JP2011059334A (en) * 2009-09-09 2011-03-24 Ricoh Co Ltd Image display control device and control method
CN102483899A (en) * 2009-09-30 2012-05-30 夏普株式会社 Image display device and image display method
WO2012090955A1 (en) * 2010-12-28 2012-07-05 シャープ株式会社 Display device, television receiver device, and method for controlling display device
WO2012120675A1 (en) * 2011-03-10 2012-09-13 Necディスプレイソリューションズ株式会社 Liquid crystal monitor
US8274459B2 (en) 2007-04-10 2012-09-25 Denso Corporation Vehicle display apparatus
US8277056B2 (en) 2001-02-27 2012-10-02 Dolby Laboratories Licensing Corporation Locally dimmed display
US8833987B2 (en) 2005-09-14 2014-09-16 Donnelly Corporation Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
US8884788B2 (en) 1998-04-08 2014-11-11 Donnelly Corporation Automotive communication system
US8890799B2 (en) 2002-03-13 2014-11-18 Dolby Laboratories Licensing Corporation Display with red, green, and blue light sources
US8908039B2 (en) 2000-03-02 2014-12-09 Donnelly Corporation Vehicular video mirror system
US8941580B2 (en) 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
US9014966B2 (en) 2000-03-02 2015-04-21 Magna Electronics Inc. Driver assist system for vehicle
US9019091B2 (en) 1999-11-24 2015-04-28 Donnelly Corporation Interior rearview mirror system
US9019090B2 (en) 2000-03-02 2015-04-28 Magna Electronics Inc. Vision system for vehicle
US9073491B2 (en) 2002-09-20 2015-07-07 Donnelly Corporation Exterior rearview mirror assembly
US9090211B2 (en) 2002-09-20 2015-07-28 Donnelly Corporation Variable reflectance mirror reflective element for exterior mirror assembly
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
US9278654B2 (en) 1999-11-24 2016-03-08 Donnelly Corporation Interior rearview mirror system for vehicle
US9352623B2 (en) 2001-01-23 2016-05-31 Magna Electronics Inc. Trailer hitching aid system for vehicle
US9557584B2 (en) 2003-05-19 2017-01-31 Donnelly Corporation Rearview mirror assembly for vehicle
US9711111B2 (en) 2008-06-25 2017-07-18 Dolby Laboratories Licensing Corporation High dynamic range display using LED backlighting, stacked optical films, and LCD drive signals based on a low resolution light field simulation
US9911389B2 (en) 2009-02-24 2018-03-06 Dolby Laboratories Licensing Corporation Locally dimmed quantum dot display
WO2018062016A1 (en) * 2016-09-29 2018-04-05 シャープ株式会社 Display device with backlight
US10175477B2 (en) 2008-03-31 2019-01-08 Magna Mirrors Of America, Inc. Display system for vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61256374A (en) * 1985-05-10 1986-11-13 Mitsubishi Electric Corp Display unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61256374A (en) * 1985-05-10 1986-11-13 Mitsubishi Electric Corp Display unit

Cited By (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592193A (en) * 1994-03-10 1997-01-07 Chunghwa Picture Tubes, Ltd. Backlighting arrangement for LCD display panel
WO1999026389A1 (en) * 1997-11-14 1999-05-27 Maxon Systems Inc. (London) Ltd. Mobile handheld telephone
US8884788B2 (en) 1998-04-08 2014-11-11 Donnelly Corporation Automotive communication system
US9221399B2 (en) 1998-04-08 2015-12-29 Magna Mirrors Of America, Inc. Automotive communication system
US9481306B2 (en) 1998-04-08 2016-11-01 Donnelly Corporation Automotive communication system
US7742031B2 (en) 1999-10-08 2010-06-22 Sharp Kabushiki Kaisha Display device and light source
US8179364B2 (en) 1999-10-08 2012-05-15 Sharp Kabushiki Kaisha Display device and light source
US9278654B2 (en) 1999-11-24 2016-03-08 Donnelly Corporation Interior rearview mirror system for vehicle
US9376061B2 (en) 1999-11-24 2016-06-28 Donnelly Corporation Accessory system of a vehicle
US10144355B2 (en) 1999-11-24 2018-12-04 Donnelly Corporation Interior rearview mirror system for vehicle
US9019091B2 (en) 1999-11-24 2015-04-28 Donnelly Corporation Interior rearview mirror system
US10131280B2 (en) 2000-03-02 2018-11-20 Donnelly Corporation Vehicular video mirror system
US9783114B2 (en) 2000-03-02 2017-10-10 Donnelly Corporation Vehicular video mirror system
US9019090B2 (en) 2000-03-02 2015-04-28 Magna Electronics Inc. Vision system for vehicle
US9809168B2 (en) 2000-03-02 2017-11-07 Magna Electronics Inc. Driver assist system for vehicle
US9809171B2 (en) 2000-03-02 2017-11-07 Magna Electronics Inc. Vision system for vehicle
US8908039B2 (en) 2000-03-02 2014-12-09 Donnelly Corporation Vehicular video mirror system
US10179545B2 (en) 2000-03-02 2019-01-15 Magna Electronics Inc. Park-aid system for vehicle
US10053013B2 (en) 2000-03-02 2018-08-21 Magna Electronics Inc. Vision system for vehicle
US9315151B2 (en) 2000-03-02 2016-04-19 Magna Electronics Inc. Driver assist system for vehicle
US9014966B2 (en) 2000-03-02 2015-04-21 Magna Electronics Inc. Driver assist system for vehicle
US6956555B2 (en) 2000-05-02 2005-10-18 Sharp Kabushiki Kaisha Light modulation information display device and illumination control device
US6982686B2 (en) 2000-06-15 2006-01-03 Sharp Kabushiki Kaisha Liquid crystal display device, image display device, illumination device and emitter used therefore, driving method of liquid crystal display device, driving method of illumination device, and driving method of emitter
US7903062B2 (en) 2000-06-15 2011-03-08 Sharp Kabushiki Kaisha Liquid crystal display device, image display device, illumination device and emitter used therefor, driving method of liquid crystal display device, driving method of illumination device, and driving method of emitter
US9352623B2 (en) 2001-01-23 2016-05-31 Magna Electronics Inc. Trailer hitching aid system for vehicle
US9694749B2 (en) 2001-01-23 2017-07-04 Magna Electronics Inc. Trailer hitching aid system for vehicle
US9412337B2 (en) 2001-02-27 2016-08-09 Dolby Laboratories Licensing Corporation Projection displays
US8277056B2 (en) 2001-02-27 2012-10-02 Dolby Laboratories Licensing Corporation Locally dimmed display
US9804487B2 (en) 2001-02-27 2017-10-31 Dolby Laboratories Licensing Corporation Projection displays
US9270956B2 (en) 2002-03-13 2016-02-23 Dolby Laboratories Licensing Corporation Image display
US8890799B2 (en) 2002-03-13 2014-11-18 Dolby Laboratories Licensing Corporation Display with red, green, and blue light sources
US10029616B2 (en) 2002-09-20 2018-07-24 Donnelly Corporation Rearview mirror assembly for vehicle
US9341914B2 (en) 2002-09-20 2016-05-17 Donnelly Corporation Variable reflectance mirror reflective element for exterior mirror assembly
US9878670B2 (en) 2002-09-20 2018-01-30 Donnelly Corporation Variable reflectance mirror reflective element for exterior mirror assembly
US9090211B2 (en) 2002-09-20 2015-07-28 Donnelly Corporation Variable reflectance mirror reflective element for exterior mirror assembly
US9545883B2 (en) 2002-09-20 2017-01-17 Donnelly Corporation Exterior rearview mirror assembly
US9073491B2 (en) 2002-09-20 2015-07-07 Donnelly Corporation Exterior rearview mirror assembly
US9557584B2 (en) 2003-05-19 2017-01-31 Donnelly Corporation Rearview mirror assembly for vehicle
US10166927B2 (en) 2003-05-19 2019-01-01 Donnelly Corporation Rearview mirror assembly for vehicle
US9783115B2 (en) 2003-05-19 2017-10-10 Donnelly Corporation Rearview mirror assembly for vehicle
JP2007504509A (en) * 2003-09-03 2007-03-01 モトローラ・インコーポレイテッドMotorola Incorporated Selective illumination of regions of an electronic display
EP1522988A2 (en) * 2003-10-09 2005-04-13 Pioneer Corporation Backlight device and display apparatus
EP1522988A3 (en) * 2003-10-09 2007-09-05 Pioneer Corporation Backlight device and display apparatus
JP2006235464A (en) * 2005-02-28 2006-09-07 Nec Saitama Ltd Method for illuminating liquid crystal screen, and cellular phone
JP4547670B2 (en) * 2005-02-28 2010-09-22 日本電気株式会社 Lighting method and mobile phone LCD screen
JP2006276113A (en) * 2005-03-28 2006-10-12 Sanyo Epson Imaging Devices Corp Electro-optical apparatus and electronic equipment
JP2007065050A (en) * 2005-08-29 2007-03-15 Kyocera Mita Corp Display device and image forming apparatus equipped with same
US10150417B2 (en) 2005-09-14 2018-12-11 Magna Mirrors Of America, Inc. Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
US8833987B2 (en) 2005-09-14 2014-09-16 Donnelly Corporation Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
US9045091B2 (en) 2005-09-14 2015-06-02 Donnelly Corporation Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
US9694753B2 (en) 2005-09-14 2017-07-04 Magna Mirrors Of America, Inc. Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
US9758102B1 (en) 2005-09-14 2017-09-12 Magna Mirrors Of America, Inc. Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle
JP2007163562A (en) * 2005-12-09 2007-06-28 Sharp Corp Video display device and video display method
JP2007163733A (en) * 2005-12-13 2007-06-28 Sharp Corp Liquid crystal display device
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
JP2007310319A (en) * 2006-05-22 2007-11-29 Sharp Corp Display device
US8941580B2 (en) 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
US8274459B2 (en) 2007-04-10 2012-09-25 Denso Corporation Vehicle display apparatus
JP2009157045A (en) * 2007-12-26 2009-07-16 Lenovo Singapore Pte Ltd Display arrangement and its power control program
US10175477B2 (en) 2008-03-31 2019-01-08 Magna Mirrors Of America, Inc. Display system for vehicle
US9711111B2 (en) 2008-06-25 2017-07-18 Dolby Laboratories Licensing Corporation High dynamic range display using LED backlighting, stacked optical films, and LCD drive signals based on a low resolution light field simulation
US9911389B2 (en) 2009-02-24 2018-03-06 Dolby Laboratories Licensing Corporation Locally dimmed quantum dot display
JP2011059334A (en) * 2009-09-09 2011-03-24 Ricoh Co Ltd Image display control device and control method
CN102483899A (en) * 2009-09-30 2012-05-30 夏普株式会社 Image display device and image display method
US8988338B2 (en) 2009-09-30 2015-03-24 Sharp Kabushiki Kaisha Image display device having a plurality of image correction modes for a plurality of image areas and image display method
WO2012090955A1 (en) * 2010-12-28 2012-07-05 シャープ株式会社 Display device, television receiver device, and method for controlling display device
WO2012120675A1 (en) * 2011-03-10 2012-09-13 Necディスプレイソリューションズ株式会社 Liquid crystal monitor
WO2018062016A1 (en) * 2016-09-29 2018-04-05 シャープ株式会社 Display device with backlight

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