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:
Apr. 13, 2010
Filed:
Sep. 30, 2005
Mitsuo Arima, Miyagi, JP;
Jun Shimizu, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Eiji Ohta, Miyagi, JP;
Kei Obata, Miyagi, JP;
Mitsuo Arima, Miyagi, JP;
Jun Shimizu, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Eiji Ohta, Miyagi, JP;
Kei Obata, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies/(+√{square root over ( )}(−(1)))++ . . .