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WO2009063874A1 - Backlight device and liquid crystal display device using the same - Google Patents

Backlight device and liquid crystal display device using the same Download PDF

Info

Publication number
WO2009063874A1
WO2009063874A1 PCT/JP2008/070520 JP2008070520W WO2009063874A1 WO 2009063874 A1 WO2009063874 A1 WO 2009063874A1 JP 2008070520 W JP2008070520 W JP 2008070520W WO 2009063874 A1 WO2009063874 A1 WO 2009063874A1
Authority
WO
WIPO (PCT)
Prior art keywords
light emitting
liquid crystal
crystal display
backlight
emitting diode
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/JP2008/070520
Other languages
French (fr)
Japanese (ja)
Inventor
Takeshi Adachi
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.)
Mitsumi Electric Co Ltd
ATRC Corp
Original Assignee
Mitsumi Electric Co Ltd
ATRC 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
Priority claimed from JP2008270221A external-priority patent/JP4956520B2/en
Application filed by Mitsumi Electric Co Ltd, ATRC Corp filed Critical Mitsumi Electric Co Ltd
Priority to CN200880112493.0A priority Critical patent/CN101868818B/en
Priority to US12/738,071 priority patent/US8766905B2/en
Publication of WO2009063874A1 publication Critical patent/WO2009063874A1/en
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
    • G09G3/342—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
    • 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
    • G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
    • 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
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0221—Addressing of scan or signal lines with use of split matrices
    • 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
    • G09G2310/024—Scrolling of light from the illumination source over the display in combination with the scanning of the display 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • 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
    • 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
    • G09G3/36—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 using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)

Abstract

Provided is a backlight device which illuminates a liquid crystal display panel from the rear surface by using a light emitting diode as a light source. A light emitting diode line is composed of a plurality of light emitting diodes linearly arranged, and a plurality of the light emitting diode lines are arranged at prescribed intervals on a backlight substrate. The backlight device is provided with a divided region setting means for dividing the whole screen of the backlight substrate into a plurality of divided regions and discretionarily setting the size of the divided region.
PCT/JP2008/070520 2007-11-13 2008-11-11 Backlight device and liquid crystal display device using the same Ceased WO2009063874A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880112493.0A CN101868818B (en) 2007-11-13 2008-11-11 Backlight device and liquid crystal display device using the same
US12/738,071 US8766905B2 (en) 2007-11-13 2008-11-11 Backlight device having a light emitting diode driving part and liquid crystal displaying device using the backlight device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007294189 2007-11-13
JP2007-294189 2007-11-13
JP2008-270221 2008-10-20
JP2008270221A JP4956520B2 (en) 2007-11-13 2008-10-20 Backlight device and liquid crystal display device using the same

Publications (1)

Publication Number Publication Date
WO2009063874A1 true WO2009063874A1 (en) 2009-05-22

Family

ID=40638723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/070520 Ceased WO2009063874A1 (en) 2007-11-13 2008-11-11 Backlight device and liquid crystal display device using the same

Country Status (1)

Country Link
WO (1) WO2009063874A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102081258A (en) * 2009-11-30 2011-06-01 乐金显示有限公司 Liquid crystal display and local dimming control control method thereof
JP2011134555A (en) * 2009-12-24 2011-07-07 Mitsubishi Electric Corp Led illumination device
US9009053B2 (en) 2008-11-10 2015-04-14 Google Inc. Multisensory speech detection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007003805A (en) * 2005-06-23 2007-01-11 Hitachi Displays Ltd LIGHTING DEVICE AND DISPLAY DEVICE HAVING THE SAME
JP2007086390A (en) * 2005-09-22 2007-04-05 Sharp Corp LED backlight device and liquid crystal display device
JP2008070558A (en) * 2006-09-13 2008-03-27 Sharp Corp Transmission type display device and display control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007003805A (en) * 2005-06-23 2007-01-11 Hitachi Displays Ltd LIGHTING DEVICE AND DISPLAY DEVICE HAVING THE SAME
JP2007086390A (en) * 2005-09-22 2007-04-05 Sharp Corp LED backlight device and liquid crystal display device
JP2008070558A (en) * 2006-09-13 2008-03-27 Sharp Corp Transmission type display device and display control method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9009053B2 (en) 2008-11-10 2015-04-14 Google Inc. Multisensory speech detection
CN102081258A (en) * 2009-11-30 2011-06-01 乐金显示有限公司 Liquid crystal display and local dimming control control method thereof
US20110128302A1 (en) * 2009-11-30 2011-06-02 Byoungchul Cho Liquid crystal display and local dimming control control method thereof
US8427418B2 (en) * 2009-11-30 2013-04-23 Lg Display Co., Ltd. Liquid crystal display and local dimming control control method thereof
US20130215161A1 (en) * 2009-11-30 2013-08-22 Lg Display Co., Ltd. Liquid crystal display and local dimming control method thereof
US9240144B2 (en) * 2009-11-30 2016-01-19 Lg Display Co., Ltd. Liquid crystal display and local dimming control method thereof
JP2011134555A (en) * 2009-12-24 2011-07-07 Mitsubishi Electric Corp Led illumination device

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