Driving voltage generating circuit voltage for liquid crystal di

Details Driving voltage generating circuit voltage for liquid crystal di Driving voltage generating circuit voltage for liquid crystal di

1998-06-29

2000-11-07

Wu, Xiao

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, 345211, G09G 336

Patent

active

061443573

ABSTRACT:
A driving circuit is provided for generating driving voltages of a liquid crystal display comprising a plurality of thin film transistors, each of which includes a source, drain, and gate. The driving circuit includes: a switching part for generating first to fourth control signals which swing between a first power voltage and a second power voltage using first to fourth input logic control signals; a driving voltage generating part controlled by the first to the fourth control signals, for generating gate on and off voltages for turning on and off said thin film transistors by raising said second power voltage and dropping said first power voltage; and a voltage maintenance part for maintaining said gate on and off voltages inputted from said driving voltage generating part at a selected voltage level.

REFERENCES:
patent: 4324991 (1982-04-01), Tamaki
patent: 5065148 (1991-11-01), Yee-Kwong
patent: 5635865 (1997-06-01), Moon et al.

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