Liquid crystal drive circuit for driving a liquid crystal displa

Details Liquid crystal drive circuit for driving a liquid crystal displa Liquid crystal drive circuit for driving a liquid crystal displa

1986-07-31

1988-09-06

Yusko, Donald J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340811, 340793, 350332, G09G 336

Patent

active

047696397

ABSTRACT:
A liquid crystal drive circuit includes a first buffer circuit for outputting a selection high level segment voltage V0' using a nonselection high level common voltage V1 from a common voltage generator as a reference, and a first operational amplifier for outputting a nonselection high level segment voltage V2' having an inverted voltage level of the selection high level segment voltage. The liquid crystal drive circuit also includes a second buffer circuit for outputting a selection low level segment voltage V5' using a nonselection low level common voltage V4 as a reference, and an operational amplifier for outputting a nonselection low level segment voltage V3' having an inverted voltage level of the nonselection low level segment voltage.

REFERENCES:
patent: 3896430 (1975-07-01), Hatsukano
patent: 3900742 (1975-08-01), Hampel et al.
patent: 3903518 (1975-09-01), Hatsukano
patent: 3936676 (1976-02-01), Fujita
patent: 3945000 (1976-03-01), Suzuki et al.
patent: 4038564 (1977-07-01), Hakata
patent: 4348666 (1982-09-01), Ogita
patent: 4581654 (1986-04-01), Kobayashi et al.

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