Afterimage elimination circuit for liquid crystal

Details Afterimage elimination circuit for liquid crystal Afterimage elimination circuit for liquid crystal

1990-09-11

1993-07-20

Oberley, Alvin E.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358166, H04N 574

Patent

active

052298604

ABSTRACT:
An afterimage elimination circuit for a liquid crystal display apparatus provides a substantial improvement of the transient response characteristics of the liquid crystal display elements, by adding to an input video signal of the display apparatus a compensation signal, derived from that video signal, having a transient response that is determined in accordance with whether a change in the input video signal level will result in an increase or decrease of electric field strength applied to the display elements, to thereby achieve optimum compensation for both rise time and fall time response of the display elements.

REFERENCES:
patent: 4677486 (1908-06-01), Noda et al.
patent: 4682251 (1987-07-01), Hirota et al.
patent: 4748498 (1988-05-01), Yamanishi et al.
patent: 4772939 (1988-09-01), Fujiwara
patent: 5029004 (1991-07-01), Shibayama
patent: 5043815 (1991-08-01), Yoshimura et al.

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