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:
Dec. 27, 1988
Filed:
Dec. 23, 1985
Takamichi Enomoto, Tokyo, JP;
Wasaburo Ohta, Kanagawa, JP;
Kiyohiro Uehara, Kanagawa, JP;
Sumio Kamoi, Chiba, JP;
Fuyuhiko Matsumoto, Saitama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A liquid crystal color display device having a liquid crystal unit, a light source, and a color filter. The liquid crystal unit has a liquid crystal cell having a sealed liquid crystal material and a transparent pixel electrode composed of pixel electrode elements. The liquid crystal unit controls transmission and shutoff of light dependent on image information. The color filter is positioned for passage therethrough of light emitted from the light source. The color filter comprises pixel filters aligned with the pixel electrode elements in the liquid crystal cell. The spectral light transmission ranges of the respective pixel filters and/or the spectral light emission ranges of the light source are determined for improved improving color reproduceability.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile