Method of control of a liquid-crystal display cell

Details Method of control of a liquid-crystal display cell Method of control of a liquid-crystal display cell

1976-05-18

1978-01-03

Engle, Samuel W.

Communications: electrical

Land vehicle alarms or indicators

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

340324M, G02F 113, G08B 2300

Patent

active

040663337

ABSTRACT:
A display cell comprises a liquid-crystal film interposed between two groups of electrodes to which is applied a set of low-frequency voltages in order to produce an optical state "0" at desired points and a set of high-frequency voltages in order to produce an optical state "1" at other predetermined points. In the composite excitation applied to each zone, the low-frequency fraction of excitation exceeds the high-frequency fraction in the "0" display zones and the high-frequency fraction exceeds the low-frequency fraction in the "1" display zones.

REFERENCES:
patent: 3575492 (1971-04-01), Nester
patent: 3655269 (1972-04-01), Heilmeier
patent: 3955187 (1976-05-01), Bigelow
patent: 3973252 (1976-08-01), Mitomo
patent: 3995939 (1976-12-01), Borel
patent: 4011008 (1977-03-01), Gerritsma
IBM Tech. Discl. Bull., Oct. 1973, vol. 16, No. 5, pp. 1578-1581.
IEEE Proceedings, vol. 59, No. 11, Nov. 1971, pp. 1566-1579.
Applied Physics Letters, vol. 19, No. 9, 1 Nov. 1971, pp. 343-345, 335-336.
Applied Physics Letters, vol. 25, No. 1, 1 July 1974, pp. 1-2.
Applied Physics Letters, vol. 25, No. 4, 15 Aug. 1974, pp. 186-188.
The Electronic Engineer, Nov. 1972, pp. 70-71.
RCA Review, vol. 35, Dec. 1974, pp. 613-650.

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