发明名称 |
A liquid crystal display driver with threshold voltage drift compensation |
摘要 |
<p>A shift register for scanning a liquid crystal display includes cascaded stages. A given stage is formed with an input transistor switch that is responsive to an output pulse of a stage upstream in the chain of the cascaded stages. An output pulse of the given stage is produced in a pull-up transistor of a push-pull amplifier. A pull-down transistor is responsive to a control signal that tracks a variation of a threshold voltage of the pull-down transistor. A difference between the control signal and the threshold voltage is maintained small in a manner to reduce a change in a conductivity of the pull-down transistor when a drift in the threshold voltage of the pull-down transistor occurs. <IMAGE></p> |
申请公布号 |
EP0731441(A2) |
申请公布日期 |
1996.09.11 |
申请号 |
EP19960400400 |
申请日期 |
1996.02.26 |
申请人 |
THOMSON MULTIMEDIA |
发明人 |
HUQ, RUQUIYA ISMAT ARA;DINGWALL, ANDREW GORDON FRANCIS |
分类号 |
G11C19/00;G09G3/36;G11C19/28;H03K19/0948;(IPC1-7):G09G3/36 |
主分类号 |
G11C19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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