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. 25, 2006
Filed:
Nov. 26, 2003
Hidehiko Hori, Tokyo, JP;
Hidehiko Hori, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A light guiding member () for reflecting therein light entering through a light entering surface () several times to cause light having a uniform illumination distribution to outgo from a light outgoing surface () is inserted into an optical path between a lamp source () and a reflection type display device (). The light outgoing surface () of the light guiding member () is formed in a dissimilar shape with an image display region of the reflection type display device (), and a region irradiated with light in the image display region of the reflection type display device () is formed smaller than the image display region. This prevents a whitening phenomenon in a projected image undisplay region and improves video effects given to viewers as well as effectively utilizing light emitted from a light source for images to be projected to display projected images brightly.