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:
Sep. 17, 2002
Filed:
Jul. 17, 2000
Applicant:
Inventors:
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1333 ; G02F 1/1345 ;
U.S. Cl.
CPC ...
G02F 1/1333 ; G02F 1/1345 ;
Abstract
In a flat surface illumination device or a liquid crystal display panel, with an aperture disposed in a frame or a case, comprising a circumferential section in which a central section receiving and supporting the light guide and the like is removed, a warp preventing means is formed in such a manner to cross the aperture. The warp preventing means comprises a long and narrow zonal thin plate in which two or more beading processes are performed.