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. 28, 2009
Filed:
Oct. 18, 2006
Yasufumi Ogawa, Chiba, JP;
Takaaki Iwaki, Tokyo, JP;
Hiroaki Uchino, Tokyo, JP;
Minoru Makida, Kanagawa, JP;
Yasufumi Ogawa, Chiba, JP;
Takaaki Iwaki, Tokyo, JP;
Hiroaki Uchino, Tokyo, JP;
Minoru Makida, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A transmissive screen includes a first board member on a light source side, the first board member including a Fresnel lens on the surface of the light source side and one of a vertical lenticular lens or a horizontal lenticular lens on the surface of a viewer side; and a second board member on the viewer side, the second board member including the other of the vertical lenticular lens or the horizontal lenticular lens. The first board member includes a diffusing layer between the Fresnel lens and the lenticular lens on the surface of the viewer side at a position close to the Fresnel lens, wherein a relation represented by θ≧tan(fp/2L) is obtained, where θ is a diffusion angle at which a distribution characteristic of diffused light passing through the diffusing layer is half the peak gain, fp is a pitch of the Fresnel lens and L is a light path between the diffusing layer and the lenticular lens on the surface of the viewer side.