Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-06-06
2000-12-12
Chang, Kent
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 95, 345 99, G09G 336
Patent
active
061605336
ABSTRACT:
A reference voltage having a plurality of voltage levels which increase stepwise over time is supplied to source lines on a display panel through a plurality of analog switches. A value representing a number of gradation display data levels for the source lines during a horizontal scanning period is supplied as one input in to a comparison circuit. A count registered by a counter and representing a gradation clock signal is supplied as a second input. Where the count is less than the value, the analog switches remain conducted. Once the count equals to or exceeds the value, the analog switches are cut off, thus enabling the supplied reference voltage to be applied as a driving voltage to a pair of pixel electrodes. The driving voltage corresponds to the number of gradation display data levels and is held constant at the pixel electrodes for the remaining horizontal scanning period.
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Nakao Tomoaki
Tamai Shigeki
Chang Kent
Sharp Kabushiki Kaishi
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