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:
Aug. 18, 1992
Filed:
Jan. 30, 1992
Applicant:
Inventors:
Esther Sluzky, Encinitas, CA (US);
Mary A Lemoine, Oceanside, CA (US);
Kenneth R Hesse, Escondido, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; C09K / ;
U.S. Cl.
CPC ...
359 50 ; 2523 / ; 340794 ; 340795 ; 359 72 ; 313468 ;
Abstract
A doubly activated yttriuim aluminum garnet (YAG) phosphor, activated with both europium and chromium, is provided. The concentration of Eu ranges from about 1 to 5 at %, while the concentration of Cr ranges from about 0.1 to 1 at %. The YAG:Eu,Cr phosphor has a line spectrum which more closely matches the spectral sensitivity of amorphous silicon liquid crystal light valves thereby, providing more efficient use of the available energy.