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:
Sep. 13, 2011
Filed:
Aug. 11, 2009
Shogo Shinkai, Miyagi, JP;
Shigehiro Yamakita, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Taku Ishimori, Miyagi, JP;
Eiji Ohta, Miyagi, JP;
Yutaka Muramoto, Miyagi, JP;
Shogo Shinkai, Miyagi, JP;
Shigehiro Yamakita, Miyagi, JP;
Yasuyuki Kudo, Miyagi, JP;
Taku Ishimori, Miyagi, JP;
Eiji Ohta, Miyagi, JP;
Yutaka Muramoto, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
An illuminating apparatus is provided and includes a plurality of point light sources in one plane and a first optical sheet and a second optical sheet overlapped in a region facing the plurality of point light sources. The plurality of point light sources are arranged in a first direction and also arranged in a second direction orthogonal to the first direction. The first optical sheet has a plurality of first three-dimensional structures extending in a direction parallel to the first direction and arranged in a direction parallel to the second direction. The second optical sheet has a plurality of second three-dimensional structures extending in a direction parallel to the second direction and arranged in a direction parallel to the first direction. Each of the second three-dimensional structures has a shape which generates a larger amount of return light from normal incident light as compared with the first three-dimensional structures.