Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-06-07
1998-08-25
Mengistu, Amare
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345149, G09G 336
Patent
active
057987432
ABSTRACT:
A display system uses a weighted PWM scheme to deliver control during a frame time for developing a plurality of grayscale levels in each of a plurality of pixels. Of all the weighted subframes, a predetermined number of the shortest subframes utilize a like subframe duration. However, to provide additional levels of grayscale, differing durations of `on` time are utilized in these like subframes. Thus, all but one of these like-time subframes has a dead zone time during which the pixels are never activated. A clear circuit turns `off` the illuminated pixels during the dead zone time.
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Mengistu Amare
Silicon Light Machines
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