Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-06-07
1996-08-13
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 87, 345 98, G09G 336
Patent
active
055461026
ABSTRACT:
Integrated driver circuitry including row and column signal generators addresses faster responding liquid crystal display panels (LCDs) so that video rate, high information content LCDs having time constants on the order of 50 ms or less are perceived as having improved contrast by limiting peak voltage levels across the pixels. In a preferred embodiment, a row signal generator includes a row signal function generator and row driver circuitry including a level shifter that delivers to each of the row electrodes a signal level corresponding to the row signal value at a time interval of a frame period. A column signal generator applies to each of the column electrodes a column signal having an amplitude that is determined by the row signals causing selections at a particular time interval and by pixel input data components of corresponding pixels defined by the overlap of the row and column electrodes. The amplitudes of multiple column signals are generated by multiple retrievals distributed over the frame period of each of the pixel input data components stored in memory sites.
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Clifton Benjamin R.
Scheffer Terry J.
Hjerpe Richard
In Focus Systems, Inc.
Mengistu Amare
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