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. 28, 2000
Filed:
Mar. 05, 1998
Applicant:
Inventor:
J Michael Lengyel, Ramona, CA (US);
Assignee:
Litton Systems, Inc., Woodland Hills, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ; F21V / ;
U.S. Cl.
CPC ...
362 84 ; 362551 ; 362559 ; 362560 ; 362561 ; 362582 ;
Abstract
A backlight assembly for liquid crystal displays uses a clear sheet of plastic or UV friendly resin as a light-pipe and has one or more fluorescent lamps located in a cavity along an edge of the sheet. The cavity is coated with photo-luminescent phosphor. A quartz ultra-violet lamp inside the cavity is filled with Argon gas and a small amount of mercury to excite the phosphor coated cavity to fluoresce. The light energy generated is throughout the light-pipe, thereby providing much brighter displays than possible with prior art light-pipe backlight assemblies.