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:
Aug. 25, 1992
Filed:
Dec. 05, 1990
Kazuya Akiyama, Tokyo, JP;
Masaru Nozawa, Tokyo, JP;
Pioneer Electronic Corporastion, Tokyo, JP;
Abstract
A rear projection television set is of the construction in which an image light projected from a projection cathode ray tube is reflected by a mirror onto the rear surface of a screen comprising a Fresnel lens and the light passes through the front surface of the screen to be viewed by viewers. The condensing distance of the Fresnel lens is selected to be less than four meters for radii of up to 300(S/40) millimeters of the Fresnel lens when the mirror is positioned relative to the screen such that A.ltoreq.200+(S-40).times.10 millimeters, where S is the diagonal distance of the screen in inches and A is the shortest distance between the mirror and the screen.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile