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US 4,012,119 AGranted
Direct current liquid crystal display with highly reflecting dielectric mirror
AssigneeXerox Corporation
InventorsJames E. Adams, Gary A. Dir
Life of this patent
Estimating the term…
Abstract
A direct current liquid crystal display device for reflection viewing comprises a dielectric mirror having at least one pair of titanium dioxide and silicon dioxide layers, the titanium dioxide layer being in contact with a layer of liquid crystalline composition, between two electrodes.
Claims10
A liquid crystal display for reflection viewing of a direct current electro-optic change in a liquid crystal layer by a reflection bandwidth having a center wavelength, .lambda., comprising:
- between two electrodes a layer of liquid crystalline composition in contact with a dielectric mirror;
- said dielectric mirror having a thickness effective for conducting direct current and comprising at least one pair of titanium dioxide and silicon dioxide layers, each layer having an optical thickness of nt = [(m + 1)/4)].lambda. where n is the index of refraction, t is the layer thickness and m is selected from the group consisting of 0 and positive whole numbers;
- said layer of titanium dioxide being in contact with said layer of liquid crystalline composition.
Dependencies are inferred from the claim text.