发明名称 |
Contrast control for a backlit LCD |
摘要 |
A contrast controller for a liquid-crystal display maximizes the display contrast by using a light sensor to detect ambient light levels and light blocked by the LCD panel. The display contrast is maximized by maximizing the difference between the ambient and blocked light levels. Further contrast maximization is accomplished through variable control of the LCD backlight in accordance with sensed light levels.
|
申请公布号 |
US5818553(A) |
申请公布日期 |
1998.10.06 |
申请号 |
US19970944720 |
申请日期 |
1997.10.06 |
申请人 |
NORAND CORPORATION |
发明人 |
KOENCK, STEVEN E.;KEEHN, II, WILLIAM HENRY |
分类号 |
G02F1/133;G09G3/34;G09G3/36;(IPC1-7):G02F1/133 |
主分类号 |
G02F1/133 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|