Varistor driven liquid crystal display

Details Varistor driven liquid crystal display Varistor driven liquid crystal display

1990-05-08

1992-06-23

James, Andrew J.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 51, 359 68, 359 70, G02F 113

Patent

active

051248220

ABSTRACT:
A liquid crystal display comprises (a) a first transparent base; (b) a plurality of first picture electrodes on the first transparent base; (c) a plurality of data lines for supplying electrical signals to the first picture electrodes; (d) a second transparent base, parallel to and spaced apart from the first transparent base; (e) a plurality of second picture electrodes on the second transparent base; (f) a plurality of varistor elements made of a varistor material comprising zinc oxide as a primary metal oxide and cobalt and praseodymium oxides as additive metal oxides, in amounts of between 0.1 and 8.0 atom % cobalt and between 0.08 and 8.0 atom % praseodymium, one varistor element being associated with and in electrical contact each second picture electrode; (g) a plurality of scan lines for supplying electrical signals to the second picture electrodes via the respective associated varistor elements; and (h) electrooptically active liquid crystal material between the first and second picture electrodes. In a preferred embodiment, the plurality of varistor elements is in the form of a varistor array comprising an integral body of varistor material having two major opposing faces, one of the opposing faces having an array of indentations thereon, each indentation defining a varistor element.

REFERENCES:
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patent: 4403217 (1983-09-01), Becker et al.
patent: 4460623 (1984-07-01), Levinson
patent: 4490014 (1984-12-01), Levinson
patent: 4525709 (1985-06-01), Hareng et al.
patent: 4856876 (1989-08-01), Fergason
patent: 4996510 (1991-02-01), Becker et al.

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