Driving circuit

Details Driving circuit Driving circuit

2005-07-19

2005-07-19

Wu, Xiao (Department: 2674)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S100000, C326S026000

Reexamination Certificate

active

06919870

ABSTRACT:
The objective of this invention is to compensate or avoid the influence of offset in an easy and efficient manner, to correctly match the voltage of the output signal with the voltage of the input signal, that is, the target value, and to significantly reduce the current consumption. When voltage follower32L supplies bias voltage VBn to each of constant current source circuits58L,60L, it acts as a source-type voltage follower. However, when the bias voltage applied to each of constant current source circuits58L,60L is changed from VBn to Vss of the power supply voltage level, each of constant current source circuits58L,60L is turned off, and no current flows through them. When the constant current source circuit58is turned off in differential input part44L, the potential at the output terminal (node) NL rises almost to the level of the power supply voltage Vdd. In this way, the driving transistor62L is also turned off in output part46L.

REFERENCES:
patent: 5343089 (1994-08-01), Itakura et al.
patent: 5459483 (1995-10-01), Edwards
patent: 5798747 (1998-08-01), Moraveji
patent: 6130549 (2000-10-01), Buck
patent: 6232946 (2001-05-01), Brownlow et al.
patent: 6236195 (2001-05-01), Nagatomo
patent: 6456270 (2002-09-01), Itakura

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