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:
Jul. 19, 1988
Filed:
Sep. 26, 1983
Applicant:
Inventor:
Rolf S Vatne, Beaverton, OR (US);
Assignee:
Tektronix, Inc., Beaverton, OR (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340701 ; 340702 ; 340784 ; 3408151 ; 350335 ; 350388 ;
Abstract
A switchable color filter comprising a pair of twisted nematic liquid crystal devices (126 and 128) and a light polarizing system (108) which includes three color selective polarizing filters (102, 104, and 106) is incorporated as an optical subassembly in a field sequential color display system (100) to provide output states of white light and light of three different colors to form an image in full color and high brightness with strong color contrast.
Vatne, Rolf. (1988). Switchable color filter and field sequential full color display system (U.S. Patent No. 4758818). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4758818
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