Liquid crystal display apparatus

Details Liquid crystal display apparatus Liquid crystal display apparatus

1977-04-18

1978-08-15

Bauer, Edward S.

350336, 350346, G02F 113

Patent

active

041068580

ABSTRACT:
An analog liquid crystal display apparatus comprising a liquid crystal film band inserted between a first conductive electrode and a second resistive electrode; a first voltage source is connected between said first and second electrodes; a second power supply is connected between the two ends of the resistive electrode; the liquid crystal presents a first optical state on a first part of the band and a second optical state on the remainder of the band. The liquid crystal is of the type having a critical relaxation frequency which is either a load relaxation frequency or a dielectric relaxation frequency, the first power supply supplying a voltage at a first frequency and the second power supply supplying a voltage at a second frequency, said two frequencies being on either side of said critical frequency; one of the voltage is then a display voltage and the other is a voltage which inhibits the display.

REFERENCES:
patent: 3675988 (1972-07-01), Soref
patent: 3857629 (1974-12-01), Freiser
patent: 3979743 (1976-09-01), Moore
patent: 4009934 (1977-03-01), Goodwin et al.
patent: 4082430 (1978-03-01), Schulthess et al.

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