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:
Jul. 22, 2008
Filed:
Dec. 15, 2004
Hiroki Yoshikawa, Hiratsuka, JP;
Tetsu Ohishi, Hiratsuka, JP;
Koji Hirata, Yokohama, JP;
Daisuke Imafuku, Fujisawa, JP;
Hiroki Yoshikawa, Hiratsuka, JP;
Tetsu Ohishi, Hiratsuka, JP;
Koji Hirata, Yokohama, JP;
Daisuke Imafuku, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a screen suitable for reducing the longitudinal dimension of a set. The present invention includes two prism sections. One is a totally reflective prism section () provided at the image generation source side of a Fresnel lens sheet (). The other is a refractive prism section () provided at the image-watching side of the Fresnel lens sheet. The refractive prism section () includes a refractive face (e) for refracting incident light and making the light exit toward the image-watching side, a plane (f) approximately parallel to the principal plane of the Fresnel lens sheet, and a connection face (g) for continuously forming the face (e) and the plane (f).