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. 01, 2011
Filed:
Jun. 21, 2006
Hiroshi Kawato, Chiba, JP;
Masami Kogure, Chiba, JP;
Hiroshi Kawato, Chiba, JP;
Masami Kogure, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A light diffusing plate integrally formed with an optical element array on the front and rear surfaces thereof, and a direct lighting device having this light diffusing plate installed on a light reflection plate having a box type shape and provided therein with a light source, whereby a light diffusing plate and a thin direct lighting device are provided which eliminate luminance non-uniformity among a number of light sources (inter-light-sources distance) at a practical level (making luminance uniform), and realize higher luminance (delivering luminance equal to that when conventional prism sheets are laminated).