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:
Mar. 26, 1991
Filed:
May. 01, 1990
Applicant:
Inventor:
Slava A Pollack, Palos Verdes Estate, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
2504831 ; 2504861 ; 340701 ; 340702 ;
Abstract
Full color alphanumeric or image displays are produced by upconverting near infrared radiation into visible light. The display system includes an upconverting screen including a host material doped with rare earth ions. The screen may be divided into pixels which may be slectively excited by infrared radiation to emit visible light of a desired color. An intensity-modulated infrared laser beam is scanned across the surface of the screen to selectively excite the screen pixels and produce the desired image.