Invention Grant
- Patent Title: Liquid crystal display drive circuit
- Patent Title (中): 液晶显示驱动电路
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Application No.: US11509632Application Date: 2006-08-25
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Publication No.: US07683879B2Publication Date: 2010-03-23
- Inventor: Shinya Yamase
- Applicant: Shinya Yamase , Kaoru Yamase, legal representative
- Applicant Address: JP Osaka
- Assignee: Sanyo Electric Co., Ltd.
- Current Assignee: Sanyo Electric Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Morrison & Foerster LLP
- Priority: JP2005-243810 20050825
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G09G5/00

Abstract:
The number of transistors in an output control circuit is significantly reduced in a liquid crystal display drive circuit. Also, power consumption is reduced and a drive voltage is stabilized. A pair of control transistors is provided for each of four output transistors TR1-TR4, resulting in total of eight control transistors being provided. The eight control transistors are switched according to a dot signal DA and a field signal DF to select one output transistor out of the four output transistors TR1-TR4. Transition from ON to OFF of the output transistors is quickened by steepening rise of DFp and DFBp that are applied to gates of the output transistors and fall of DFn and DFBn that are applied to gates of the output transistors. Also, transition from OFF to ON is delayed by slackening fall of DFp and DFBp and rise of DFn and DFBn.
Public/Granted literature
- US20070046598A1 Liquid crystal display drive circuit Public/Granted day:2007-03-01
Information query
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