Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-12-26
2006-12-26
Osorio, Ricardo (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S100000
Reexamination Certificate
active
07154466
ABSTRACT:
In executing the opposing common inverse drive in an active matrix-type semiconductor display device, a gate bias is suppressed to be comparable with that of the conventional inverse drive to avoid a range in which the off current jumps up and, hence, to suppress the leakage of the stored electric charge, thereby to maintain an ON/OFF margin of the pixel TFTs. The gate bias applied to the pixel TFT is maintained to be near the customarily employed voltage to maintain a gate breakdown voltage, and the electric power is consumed in a decreased amount by the drive circuit as a whole, thereby to provide a novel drive circuit. In the semiconductor display device, a tristate buffer is used for a gate signal line drive circuit, and different buffer potentials are applied depending upon a frame in which the opposing common potential assumes a positive sign and a frame in which the opposing common potential assumes a negative sign, thereby to maintain an ON/OFF margin of the pixel TFTs. The voltage amplitude is decreased during the opposing common inverse drive.
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Osame Mitsuaki
Tanaka Yukio
Cook, Ales, McFarron, Manzo, Cummings & Mehler, Ltd.
Osorio Ricardo
Semiconductor Energy Laboratory Co,. Ltd.
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