Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-09-06
2005-09-06
Chang, Kent (Department: 2675)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S100000, C345S094000
Reexamination Certificate
active
06940482
ABSTRACT:
The invention simplifies the configuration of a comparators circuit used in an electrooptic device or the like, in which gradation data is stored for each pixel, to realize lower power consumption, higher definition and multiple gradation. Transistors in which gradation data D0to D2are respectively supplied to the gate terminals, and transistors in which gradation signals P0to P2resulting from counting are respectively supplied to the gate terminals are connected to form a comparator circuit. When the gradation signals P0to P2are less than the results of reversal of the gradation data D0to D2, the comparator circuit is placed into a nonconductive state, while when the gradation signals P0to P2are equal to the results of reversal of the gradation data D0to D2, the comparator circuit is placed into a conductive state. As a result, a pulse signal PW can be produced according to the gradation data D0to D2to realize a gradation display in a sub-field driving system. Also, the number of the transistors constituting the comparator circuit can be significantly decreased, as compared with a related art technique.
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Ishii Ryo
Yamazaki Suguru
Chang Kent
Seiko Epson Corporation
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