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:
Mar. 05, 1985
Filed:
Dec. 16, 1982
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
In a rear projection screen, a pair of light-refracting plates oppose each other. A plurality of first convex lens elements are arranged parallel to each other on one surface of the light-reacting plate, and a plurality of second convex lens elements are arranged parallel to each other on the other surface of the light-refracting plates. Similarly, a plurality of first convex lens elements are arranged parallel to each other on one surface of the light-refracting plate, and a plurality of second convex lens elements are arranged parallel to each other on the other surface of the light-refracting plate. Each pair of opposed first and second convex lens elements is located along a common optical axis thereof. A convex surface of each first convex lens element is located at a focal plane of the corresponding second convex lens element. A convex surface of each second convex lens element is located on a focal plane of the corresponding first convex lens element. A longitudinal axis of the first and second lens elements of one of the plates is perpendicular to that of the first and second lens elements of the other one of the plates.