The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2000
Filed:
Jul. 16, 1997
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
349 88 ; 349115 ; 349 84 ;
Abstract
A switchable liquid crystal device, for instance for use as a reflective display, includes a cell containing a helical polymer network and a nematic liquid crystal. Electrodes are provided for applying a field across the cell so as to switch between different optical states. In a reflective state, the cell reflects incident light within a waveband which is relatively insensitive to temperature variations. The device is formed by filling the cell with the liquid crystal and polymer precursor material and then cross-linking or polymerising, for instance by photopolymerisation, the precursor material to form the helical polymer network.