发明授权
- 专利标题: Dynamic correction of LCD gamma curve
- 专利标题(中): LCD伽马曲线的动态校正
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申请号: US08885761申请日: 1997-06-30
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公开(公告)号: US06256010B1公开(公告)日: 2001-07-03
- 发明人: Yen-Chen Chen , Chien-Ho Lin , Chih-Wei Wang
- 申请人: Yen-Chen Chen , Chien-Ho Lin , Chih-Wei Wang
- 主分类号: G09G510
- IPC分类号: G09G510
摘要:
A method and means for correcting the &ggr; - curve of an LCD by calculating an inverse &ggr; - curve from the &ggr; - curve of the LCD measured by the manufacturer and producing a straight line V-T plot from the combination, a set of corrected voltages selected from the inverse &ggr; - curve is provided for the different positions or viewing angles of the display, thus improving the &ggr; - curve correction efficiency at different viewing angles of the LCD. In one embodiment, a timing control ASIC, that produces the horizontal scan and vertical scan signals of the display, is used to time the outputting of sets of &ggr; - curve correction voltage signals stored in high speed memories for application, after digital to analog conversion, to the horizontal scan lines of the LCD to be corrected. The ASIC also provides a set of latch enable signals to a set of data latches, which receive the correction voltage signals as input signals from the memories, and provide the corrected voltage outputs, through a set of digital to analog converters (DACs) to a number of output lines connected to the LCD.
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