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Title:
LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2011/055584
Kind Code:
A1
Abstract:
Disclosed is a liquid crystal display device provided with a monolithic gate driver, wherein residual charge in a pixel formation portion can be rapidly eliminated when the power is turned off. In a bistable circuit which constitutes a shift register in a gate driver (24), a thin-film transistor having a drain terminal connected to a gate bus line, a source terminal connected to a reference potential line for transmitting a reference potential (H_SIG_VSS), and a gate terminal to which a clock signal (HCK_1, HCK_2) for operating the shift register is given is provided. When a power OFF detection unit (17) detects the cutoff of the supply of power-supply voltage (PW) from the outside, the clock signal (HCK_1, HCK_2) is driven high to turn the thin-film transistor on, and a reference potential switching circuit (19) switches the reference potential (H_SIG_VSS) from a gate off potential (VGL) to a gate on potential (VGH).

Inventors:
MORII, Hideki (())
森井 秀樹 (())
IWAMOTO, Akihisa (())
岩本 明久 (())
Application Number:
JP2010/064559
Publication Date:
May 12, 2011
Filing Date:
August 27, 2010
Export Citation:
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Assignee:
SHARP KABUSHIKI KAISHA (22-22, Nagaike-cho Abeno-ku, Osaka-sh, Osaka 22, 〒5458522, JP)
シャープ株式会社 (〒22 大阪府大阪市阿倍野区長池町22番22号 Osaka, 〒5458522, JP)
MORII, Hideki (())
森井 秀樹 (())
IWAMOTO, Akihisa (())
International Classes:
G09G3/36; G02F1/133; G09G3/20
Domestic Patent References:
WO2009104307A1
WO2007007768A1
Foreign References:
JP2002215099A2002-07-31
JP2007094016A
JP2004045785A
JP2007011346A
Attorney, Agent or Firm:
SHIMADA, Akihiro (Shimada Patent Firm, Manseian Building 1-10-3, Yagi-cho, Kashihara-sh, Nara 78, 〒6340078, JP)
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