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:
Feb. 27, 1990
Filed:
Apr. 14, 1989
Shuji Aruga, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projection-type display device for producing a faithful colored synthesized image based on equating the luminous intensity distributions and light patterns produced by three twisted nematic liquid crystal light valves for three primary color images. Each light valve includes a twisted nematic liquid crystal composition which is twisted to the right or left depending on the number of times that color light is reflected. Each light valve may include an active switching matrix arranged in mirror-like symmetry with light shield layers also arranged symmetrically.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile