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:
Apr. 09, 1996
Filed:
Aug. 23, 1994
Applicant:
Inventor:
Satoshi Inoue, Tokyo, JP;
Assignee:
Inoue Denki Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385129 ; 385147 ; 385901 ;
Abstract
A light guiding plate has grooves or ridges with respective bottom or peak portions having surfaces with curvilinear sectional contours. The curvilinear portions replace angular intersections of slanted surfaces of the grooves or ridges and thereby provide uniform luminance over an entire face of the light guiding plate.