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. 18, 1977
Filed:
Feb. 20, 1976
Norio Itoh, Tokyo, JA;
Masayuki Omori, Tokyo, JA;
Sony Corporation, Tokyo, JA;
Abstract
Three cathode ray tubes are provided for projecting and converging three different primary color images on a back projection screen. The back projection screen has a first cylindrically lenticulated face facing toward the cathode ray tubes for determining a viewing angle of the screen and a second cylindrically lenticulated face on the opposite side thereof for arranging in parallel the emergent light axes of three luminous fluxes respectively projected from the three cathode ray tubes. Color shading of the color image projected on the screen which would be caused by convergence of the three light axes extending from the cathode ray tubes is eliminated by the second cylindrically lenticulated face of the screen.