Display comprising a cholesteric liquid-crystal in hardened...

Details Display comprising a cholesteric liquid-crystal in hardened... Display comprising a cholesteric liquid-crystal in hardened...

2007-06-12

2007-06-12

Bashore, Alain L. (Department: 1762)

Coating processes

Optical element produced

C427S163300, C427S163400, C427S372200, C427S064000

Reexamination Certificate

active

10619329

ABSTRACT:
A method of making a liquid-crystal sheet material, useful for displays, having polymer-dispersed cholesteric liquid crystals, comprising the steps of providing a emulsion comprising dispersed cholesteric liquid crystal domain and a solution comprising gelatin and a hardening agent, coating said emulsion onto a substrate; and drying said emulsion to form polymer-dispersed liquid-crystal domains dispersed in a continuous matrix comprising hardened gelatin. The invention is also directed to a display having an imaging layer comprising domains of polymer-dispersed cholesteric liquid-crystal material dispersed in a continuous matrix comprising hardened gelatin, said imaging layer disposed between first and second conductors. The invention is advantageous in reducing sensitivity to temperature and/or high humidity, especially in thin displays or displays that are open to the environment.

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patent: 2005/0084801 (2005-04-01), El-Hafidi et al.
patent: 1 116771 (2001-07-01), None

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