Variable color electrooptic display

Details Variable color electrooptic display Variable color electrooptic display

1983-03-31

1986-12-16

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340701, 340702, 340704, 340783, 350388, 350390, G09G 316

Patent

active

046300406

ABSTRACT:
An electrooptic color display for displaying selectable indicia includes a ferroelectric ceramic element, such as a PLZT material, first and second polarizers on each side of the element, and a mechanism for selectively inducing a transverse electric field at selectable areas on the element, said areas corresponding to the indicia. The electric field can be produced by applying a voltage to transparent interleaved electrodes on one or both surfaces of the ceramic element. These areas produce spectrally selective phase retardation which causes the color of the indicia to be different from that of the background color. Preferably a separate retardation element which may be fixed, variable, or a combination of both, is disposed between the polarizers to provide a fixed color bias that determines the background color. This invention contemplates transmissive, reflective, and transflective color displays.

REFERENCES:
patent: Re28847 (1976-06-01), Vizenor
patent: 2604807 (1952-07-01), Woodburn
patent: 2616962 (1952-11-01), Jaffe
patent: 2649029 (1953-08-01), Bacon
patent: 2711667 (1955-06-01), Simjian
patent: 3499704 (1970-03-01), Land et al.
patent: 3512864 (1970-05-01), Haertling et al.
patent: 3531182 (1970-09-01), Land et al.
patent: 3609002 (1971-09-01), Fraser et al.
patent: 3674342 (1972-07-01), Castellano et al.
patent: 3737211 (1973-06-01), Cutchen et al.
patent: 3783184 (1974-01-01), Ernstoff et al.
patent: 3785721 (1974-01-01), Harsch
patent: 3799647 (1974-03-01), Luft
patent: 3806227 (1974-04-01), Greubel et al.
patent: 3813144 (1974-05-01), Kumada et al.
patent: 3915554 (1975-10-01), Maezawa
patent: 3923370 (1975-12-01), Mostrom
patent: 3932861 (1976-01-01), Bull
patent: 3938878 (1976-02-01), Fox
patent: 3944330 (1976-03-01), Tsunoda et al.
patent: 3955190 (1976-05-01), Teraishi
patent: 3960438 (1976-06-01), Bonne et al.
patent: 3990770 (1976-11-01), Carl et al.
patent: 3997690 (1976-12-01), Chen
patent: 4015422 (1977-04-01), Haaften
patent: 4019808 (1977-04-01), Scheffer
patent: 4027949 (1977-06-01), Lobb
patent: 4054368 (1977-10-01), Krueger et al.
patent: 4097128 (1978-06-01), Matsumoto et al.
patent: 4097130 (1978-06-01), Cole, Jr.
patent: 4167113 (1979-09-01), Mann
patent: 4190832 (1980-02-01), Mohler
patent: 4222638 (1980-09-01), Robert
patent: 4232948 (1980-11-01), Shanks
patent: 4239349 (1980-12-01), Scheffer
patent: 4241339 (1980-12-01), Ushiyama
patent: 4294518 (1981-10-01), O'Connor et al.
patent: 4379621 (1983-04-01), Ikedo et al.
C. E. Land, Ferroelectric Ceramic Electrooptic Materials and Devices, IEEE, vol. 57, May 1969.
Article on PLZT Electrooptic Ceramics and Devices by Gene H. Haertling, Copyright 1981, Motorola, Inc., pp. 274-277.
Article on Display Applications of PLZT Ceramics by J. R. Maldonado, D. B. Fraser, and A. H. Meitzler, Bell Laboratories.
Article on "International Handbook of Liquid Crystal Displays 1975-1976" by Ovum Ltd., published in 1975 (London, GB), p. 52, see p. 52, paragraph 8.3 by Martin Tobias.

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