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:
Aug. 21, 2012
Filed:
May. 20, 2009
Shogo Shinkai, Miyagi, JP;
Shigehiro Yamakita, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Shogo Shinkai, Miyagi, JP;
Shigehiro Yamakita, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
An illuminating device capable of decreasing not only in-plane luminance unevenness in the front face direction but also in-plane luminance unevenness when viewed from a diagonal direction is provided. Where an occupancy ratio of a return light generation section in which light from respective linear light sources vertically entering a light incident surface of an optical sheet is entirely reflected by a surface of a convex section and return light oriented toward a reflecting plate is generated out of a first region Rwhen the optical sheet is viewed from the normal line direction of a face is K; and where an occupancy ratio of a return light generation section in which light from the respective linear light sources vertically entering the light incident surface of the optical sheet is entirely reflected by a surface of convex sections and return light oriented toward the reflecting plate is generated out of a second region when the optical sheet is viewed from the normal line direction of the face is K, and Kis larger than K