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. 21, 2012
Filed:
Aug. 21, 2009
Shogo Shinkai, Miyagi, JP;
Akihiro Shibata, Miyagi, JP;
Katsuhiro Doi, Miyagi, JP;
Satoko Asaoka, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Shogo Shinkai, Miyagi, JP;
Akihiro Shibata, Miyagi, JP;
Katsuhiro Doi, Miyagi, JP;
Satoko Asaoka, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A surface illuminating device is provided and includes a plurality of linear light sources, a light-transmissive optical sheet including a luminance-distribution control layer for decreasing unevenness in luminance of light emitted from the linear light sources, and a reflection surface for reflecting the light emitted from the linear light sources. The luminance-distribution control layer includes a plurality of protrusions. In a range of 0≦x≦L/2, protruding directions of some or all the protrusions are inclined such that the protruding directions of the protrusions are located farther from a Z direction, which is an optical axis of a linear light source in an X direction, to the X direction as the protrusions are located farther from the position of x=0 in the X direction, where the X direction represents the arrangement direction of the linear light sources.