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. 09, 1997
Filed:
Feb. 10, 1995
Applicant:
Inventors:
Yasuhiro Asada, Tokyo, JP;
Kiichi Emori, Tokyo, JP;
Assignee:
Colcoat Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362 31 ; 362 27 ; 362330 ; 362800 ;
Abstract
A light conductive plate used in a side light source type plane illuminating apparatus having a light source arranged on one side portion of a transparent light conductive plate, has a dimming pattern composed of a plurality of curves provided on the back of said light conductive plate. Portions of each of the curves of the dimming pattern located nearer the edge near a light source extend substantially perpendicular to the edge and portions of each of the curves of the dimming pattern located farther from the edge near a light source extend substantially parallel to the edge.