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WO2008117863A1 - Liquid crystal display device and its control method - Google Patents

Liquid crystal display device and its control method Download PDF

Info

Publication number
WO2008117863A1
WO2008117863A1 PCT/JP2008/056023 JP2008056023W WO2008117863A1 WO 2008117863 A1 WO2008117863 A1 WO 2008117863A1 JP 2008056023 W JP2008056023 W JP 2008056023W WO 2008117863 A1 WO2008117863 A1 WO 2008117863A1
Authority
WO
WIPO (PCT)
Prior art keywords
scan signal
drop
potential
signal lines
liquid crystal
Prior art date
Application number
PCT/JP2008/056023
Other languages
French (fr)
Japanese (ja)
Inventor
Masaki Uehata
Masami Ozaki
Keiichi Yamamoto
Atsuhito Murai
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
Publication of WO2008117863A1 publication Critical patent/WO2008117863A1/en

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
    • G09G3/36—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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/13606—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit having means for reducing parasitic capacitance
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

An in-plane flicker is prevented by a simple structure even if wires from a gate driver to respective scan signal lines are different in length. In a liquid crystal display device, respective gate wires (Lg(n)) connecting from the gate driver (400) to the respective scan signal lines (GL(n)) of a display unit (600) are different in length, and waveform distortion of a scan signal (G(n)) differs for each of the scan signal lines (GL(n)). Therefore, a quantity of a drop in pixel electrode potential caused by a drop in potential of the scan signal line differs depending on parasitic capacity (Cgd) between the scan signal line and a pixel electrode. Reference voltages V1 to V4 for applying an appropriate potential change to each auxiliary capacitance line (Cs(n)) to approximately completely compensate the drop in potential are generated by a simple slope voltage generation circuit (700). This can prevent the in-plane flicker by a simple structure.
PCT/JP2008/056023 2007-03-28 2008-03-28 Liquid crystal display device and its control method WO2008117863A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-083493 2007-03-28
JP2007083493 2007-03-28

Publications (1)

Publication Number Publication Date
WO2008117863A1 true WO2008117863A1 (en) 2008-10-02

Family

ID=39788594

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/056023 WO2008117863A1 (en) 2007-03-28 2008-03-28 Liquid crystal display device and its control method

Country Status (1)

Country Link
WO (1) WO2008117863A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3292520B2 (en) * 1991-10-11 2002-06-17 株式会社東芝 Liquid crystal display
JP2004240263A (en) * 2003-02-07 2004-08-26 Casio Comput Co Ltd Display drive device and drive control method thereof
JP2004325808A (en) * 2003-04-24 2004-11-18 Nec Lcd Technologies Ltd Liquid crystal display device and driving method thereof
JP2006258945A (en) * 2005-03-15 2006-09-28 Casio Comput Co Ltd Display device and display drive circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3292520B2 (en) * 1991-10-11 2002-06-17 株式会社東芝 Liquid crystal display
JP2004240263A (en) * 2003-02-07 2004-08-26 Casio Comput Co Ltd Display drive device and drive control method thereof
JP2004325808A (en) * 2003-04-24 2004-11-18 Nec Lcd Technologies Ltd Liquid crystal display device and driving method thereof
JP2006258945A (en) * 2005-03-15 2006-09-28 Casio Comput Co Ltd Display device and display drive circuit

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