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. 05, 1978
Filed:
May. 17, 1976
Hans Krueger, ALL OFMunich, DE;
Hans F Mahlein, all ofMunich, DE;
Walter Rauscher, ALL OFMunich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A liquid crystal cell comprising a layer of liquid crystal material interposed between a pair of carrier plates with at least one plate being transparent characterized by a film of metal inorganic salt selected from a group comprising magnesium fluoride, thorium fluoride, zinc sulphide, aluminum oxide, or thorium oxide deposited on at least selected areas of a surface of one of the carrier plates to cause homeotropic orientation or a tilted homeotropic orientation of the molecules of the liquid crystal material contacting the film. To provide the film, the carrier plate is positioned in spaced relationship to a source of the salt which is vaporized and deposited on the plate in the desired areas to produce the column-like structure of the desired angular orientation.