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. 11, 2003
Filed:
Sep. 19, 2001
Applicant:
Inventor:
Keiichiro Kumagai, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 9/00 ;
U.S. Cl.
CPC ...
H01H 9/00 ;
Abstract
A light diffusion unit includes (a) a substrate formed with a first hole, (b) a case formed with a second hole and covering the substrate therewith, (c) a light source mounted on the substrate, (d) a light diffuser arranged in the second hole of the case for externally radiating a light emitted from the light source, and (e) a light guide arranged between the substrate and the light diffuser for introducing a light emitted from the light source, to the light diffuser, the light guide partially making close contact with the light diffuser and being partially arranged in the first hole of the substrate.