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:
May. 18, 1993
Filed:
Mar. 11, 1992
Applicant:
Inventor:
Michael H Kalmanash, Los Altos, CA (US);
Assignee:
Kaiser Aerospace & Electronics Corporation, Foster City, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V / ; F21Y / ;
U.S. Cl.
CPC ...
362 26 ; 362 31 ; 362 23 ; 362253 ; 362 62 ;
Abstract
A backlight system for liquid crystal device display is equipped with a dual lighting system for day viewing and compatible with night vision systems. The day lighting system uses conventional fluorescent or incandescent lamps for full color display during daytime use. The night lighting system uses a light source which is either filtered to remove infrared and near infrared wavelengths or which is chosen from a class of sources which does not emit such wavelengths. The day lighting system is disabled while the night system is in use.