Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2005-11-08
2005-11-08
Liang, Regina (Department: 2674)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S076000, C345S082000
Reexamination Certificate
active
06963336
ABSTRACT:
Variations occur in the characteristics of transistors. The present invention is a signal-line drive circuit comprising first and second current source circuits corresponding to respective plurality of signal lines, a shift register, and n (n is a natural number of one or more) video-signal constant current source s, wherein each of the first and second current source circuits has a capacitance means and a supply means. The capacitance means held in one of the first and second source circuits converts a current including a current supplied from each of the n video-signal constant current source s to voltage in response to a sampling pulse supplied from the shift register and a latch pulse supplied from the exterior; and the supply means held in the other supplies a current responsive to the converted voltage. The values of the currents supplied from the n video-signal constant current source s are set to a proportion of 20:21: . . . :2n.
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Liang Regina
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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