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:
Nov. 23, 1999
Filed:
Apr. 17, 1996
Applicant:
Inventor:
Kazuaki Yokoyama, Ageo, JP;
Assignee:
Enplas Corporation, Kawaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362 31 ; 362 26 ; 362327 ; 362330 ;
Abstract
Surface light source device having a light conducting member, a light source, a light diffusing member disposed on a front light incidence surface side of the light conducting member, and a light reflecting member arranged on a rear side of the light conducting member; and a refractive index of the light conducting member is arranged to be constant for a distance from the light incidence surface and then to be varied so as to be smaller as farther from the light source, to obtain a bright and uniform brightness distribution.
Quick Actions:
Yokoyama, Kazuaki. (1999). Surface light source device (U.S. Patent No. 5988826). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5988826
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