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:
Sep. 08, 1998
Filed:
Oct. 18, 1996
Yasuaki Nakanishi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A projection-type display device includes an image projector and a screen, in which image projector is for projecting image light rays and the screen is disposed on a side to which the image light rays are projected from the image projector. The screen is formed of a Fresnel lens sheet with one side thereof facing the image projector and a lenticular sheet disposed on the other side of the Fresnel lens sheet for transmitting the image light rays that are formed into a picture on the screen. The Fresnel lens sheet has a fixed focal length in a region from the center of the Fresnel lens sheet to a prescribed distance and focal lengths gradually decreasing toward the outer periphery of the Fresnel lens sheet in a region exceeding the prescribed distance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile