Invention Grant
- Patent Title: Liquid crystal display device and liquid crystal display driving circuit
- Patent Title (中): 液晶显示装置和液晶显示驱动电路
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Application No.: US11792039Application Date: 2006-01-30
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Publication No.: US08094108B2Publication Date: 2012-01-10
- Inventor: Hiroyuki Higashino , Tetsuya Umehara , Yasuki Mori
- Applicant: Hiroyuki Higashino , Tetsuya Umehara , Yasuki Mori
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2005-025245 20050201
- International Application: PCT/JP2006/001487 WO 20060130
- International Announcement: WO2006/082791 WO 20060810
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
A gradation voltage adjustment section for increasing a positive gradation voltage VHX of an X-th gradation and a negative gradation voltage of the X-th gradation so that the increment corresponds to a charge pull-in amount ΔV is provided in a gradation voltage generation circuit of each source driver. In at least one embodiment, a center value between the positive and negative gradation voltages is adjusted for each driver in accordance with a slant of the charge pull-in amount ΔV in a direction of a gate signal line, thereby suppressing a flicker without varying a gradation characteristic. Further, a center value between the positive and negative gradation voltages is adjusted for each horizontal line or for every plural lines in a single frame in accordance with a horizontal direction deviation and a vertical direction deviation of the charge pull-in amount ΔV in a transfer block, thereby suppressing a flicker without varying a gradation characteristic.
Public/Granted literature
- US20080012840A1 Liquid Crystal Display Device and Liquid Crystal Display Driving Circuit Public/Granted day:2008-01-17
Information query
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