发明名称 |
COLOR CALIBRATION FOR LCD PANEL |
摘要 |
A presentation system uses a computer to store and transmit electronic images to a liquid crystal display (LCD) panel which rests on an overhead projector. The LCD panel includes a calibration circuit designed to correct discrepancies in the saturation levels of the three primary colors. The calibration circuit determines the digital values in a signal corresponding to a test pattern of maximum intensity for all three colors, and compares these values to predetermined theoretical values. The differences between these values are recorded as calibration constants and are used to correct the image signals transmitted from the computer. A remote control unit may be used to provide a stimulus to both the computer (to generate the test pattern) and the LCD panel (to execute the calibration process). |
申请公布号 |
WO9320660(A1) |
申请公布日期 |
1993.10.14 |
申请号 |
WO1993US00660 |
申请日期 |
1993.01.25 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
KENNEDY, JAMES, K. |
分类号 |
G02F1/133;G09G3/36;H04N9/12;H04N9/30;H04N9/73;H04N17/00;H04N17/04;(IPC1-7):H04N17/02 |
主分类号 |
G02F1/133 |
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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