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:
May. 30, 2006
Filed:
Dec. 03, 2002
Tsutomu Yoshida, Tokyo, JP;
Kazuyoshi Ebina, Tokyo, JP;
Takashi Abe, Tokyo, JP;
Susumu Takahashi, Tokyo, JP;
Tsutomu Yoshida, Tokyo, JP;
Kazuyoshi Ebina, Tokyo, JP;
Takashi Abe, Tokyo, JP;
Susumu Takahashi, Tokyo, JP;
Toppan Printing Co., Ltd., Tokyo, JP;
Abstract
A lens array sheet, a transparent screen using the same, and a rear-projection display device are provided in which it is possible to control a perspective angle for the image in both a horizontal direction and a vertical direction without causing a problem in that a gain (brightness) of a light is reduced by an optical absorption and an S/N ratio is reduced by an increased white dispersion. A first lens arrayand a second lens arraywhich are formed by disposing a plurality of half-cylindrical lensesin parallel on a common plain (a surface of a base member layer) such that longitudinal directions of the cylindrical lensesshould be orthogonal to each other. Unified lens array layerand a shading layerin which a section through which a light does not transmit is formed on a focal plain of the lens array layerform a lens array sheet. Furthermore, fresnel lens are combined so as to form a transparent screen.