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:
Feb. 03, 2004
Filed:
Dec. 09, 2002
Applicant:
Inventor:
Shingo Miyazaki, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 1/128 ;
U.S. Cl.
CPC ...
G01D 1/128 ;
Abstract
A backlight apparatus includes a point light source, a linear light guide, a plane light guide, and a light shield unit. Rays of light radiated by the point light source travel through the linear light guide and the plane light guide, and are output to an illuminated object. The light shield unit shuts out a leaking fraction of rays of light that travels directly from the point light source to the plane light guide, thereby assuring uniform brightness of the output light.
Miyazaki, Shingo. (2004). Backlight apparatus that can assure uniform brightness (U.S. Patent No. 6685330). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6685330
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile