Invention Grant
- Patent Title: Liquid crystal display drive circuit and liquid crystal display device
- Patent Title (中): 液晶显示驱动电路和液晶显示装置
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Application No.: US12998481Application Date: 2009-10-28
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Publication No.: US08743041B2Publication Date: 2014-06-03
- Inventor: Toru Kuriyama , Hisashi Yamaguchi , Hiromasa Asada
- Applicant: Toru Kuriyama , Hisashi Yamaguchi , Hiromasa Asada
- 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: JP2008-280342 20081030
- International Application: PCT/JP2009/068509 WO 20091028
- International Announcement: WO2010/050511 WO 20100506
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
In order to carry out a display reset operation, a segment driver and a common driver are driven to operate as below during a display data reading period in which voltages to be applied to a liquid crystal display panel are nonuniform between lines. First, a shift register and a level shifter which are provided in the segment driver and a shift register and a level shifter which are provided in the common driver are driven to operate as usual, whereas a display control signal supplied from a controller causes output circuits to stop carrying out their respective output operations. In at least one embodiment, during a period in which a writing operation is carried out with respect to the liquid crystal display panel so as to carry out the display reset operation, the display control signal supplied from the controller allows the output circuits to carry out the respective output operations. This allows a memory (e.g., cholesteric) liquid crystal display device to carry out a display reset operation without causing display unevenness by simultaneously selecting a plurality of lines.
Public/Granted literature
- US20110205203A1 LIQUID CRYSTAL DISPLAY DRIVE CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2011-08-25
Information query
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