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:
Oct. 05, 2004
Filed:
Sep. 30, 2003
Akira Sekiguchi, Tokyo, JP;
Hidehiko Hori, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An image display projector includes a lens element for focusing a light beam from a lamp light source, a reflecting mirror for reflecting a light beam emitted from the lens element, an elliptical mirror for reflecting a light beam emitted from the reflecting mirror, a light valve for modulating a light beam reflected by the elliptical mirror, thereby forming an image light, and a projection lens for projecting the image light onto a screen. In this image display projector, a light focusing point, where the light beam emitted from the lens element is focused, is symmetric to one of the two focal points of the elliptical mirror with respect to the reflecting mirror, and the center of an entry pupil of the projection lens is symmetric to the second focal point of the elliptical mirror with respect to the light valve.