Output circuit, liquid crystal driving circuit, and liquid...

Details Output circuit, liquid crystal driving circuit, and liquid... Output circuit, liquid crystal driving circuit, and liquid...

2008-04-22

2008-04-22

Hjerpe, Richard (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

10873266

ABSTRACT:
An output circuit for driving a signal line in, for example, a liquid crystal display panel has an impedance conversion element that generates an output signal from an input signal and a feedback signal. During output periods, a first switch conducts the output signal to the output terminal of the output circuit and a second switch conducts the output signal from the output terminal back to the impedance element as the feedback signal. During non-output periods, the first and second switches are switched off and a third switch conducts the output signal back to the impedance element as the feedback signal from a point between the impedance conversion element and the first switch. This dual feedback scheme enables the signal line to be precharged during non-output periods while avoiding loss of driving speed and accuracy during output periods.

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