Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-06-07
1997-06-24
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345 89, G09G 336
Patent
active
056421338
ABSTRACT:
Method and apparatus are disclosed for providing gray level addressing for passive matrix liquid crystal display (LCD) panels having pixels defined by overlapping row and column electrodes. The pixels have optical states determined by the rms voltage appearing across the pixels during a frame period. The frame period is divided into characteristic time intervals, which are further divided into sub-intervals. The amplitude of the column signals during each of the sub-intervals is determined from the desired gray level of the pixel or pixels defined by the corresponding column electrode and selected one or ones of the row electrodes.
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Clifton Benjamin R.
Conner Arlie R.
Scheffer Terry J.
Hjerpe Richard
In Focus Systems, Inc.
Mengistu Amare
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