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. 01, 1992
Filed:
Nov. 15, 1991
Susumu Tsujikawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optically addressed liquid crystal light valve includes a first substrate on which a plurality of liquid crystal driving circuits are formed, a second substrate provided with a transparent electrode, and a ferroelectric liquid crystal sandwiched between the two substrates. Each liquid crystal driving circuit includes a plurality of photodetectors and a logic circuit. An optical logic device includes an optically addressed liquid crystal light valve explained above and a plurality of masks for selectively transmit a plurality of lights. The masks may be replaced by a wavelength selecting filter including a plurality of regions each transmit a light having a specific wavelength to a corresponding photodetector of the light valve.