Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1994-08-31
1996-04-23
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345 95, H02M 318, G09G 336
Patent
active
055108148
ABSTRACT:
A drive voltage generating device for a liquid crystal display device includes a terminal voltage supply source for generating an output voltage of V.sub.S, an actuating voltage supply source for generating an output voltage of V.sub.E, and a plurality of circuit sections. Each circuit section is composed of a first capacitor for storing therein a charge supplied from the terminal voltage supply source, a second capacitor for storing therein a charge transferred from the first capacitor an output terminal section for receiving a voltage V.sub.S from the second capacitor and a switch for switching respective connections between the terminal voltage supply source and the first capacitor, and between the first and second capacitors. The switch is provided for switching between an operation for supplying a charge from the terminal voltage supply source to the first capacitor and an operation for transferring a charge stored in the first capacitor to the second capacitor.
REFERENCES:
patent: 4279010 (1981-07-01), Morihisa
patent: 4570115 (1986-02-01), Misawa et al.
patent: 4802739 (1989-02-01), Iwamoto
patent: 4807104 (1989-02-01), Floyd et al.
patent: 5229761 (1993-07-01), Fuse
Hjerpe Richard A.
Saras Steven J.
Sharp Kabushiki Kaisha
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