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:
Dec. 13, 1983
Filed:
Mar. 10, 1982
Toshiharu Shimizu, Yokohama, JP;
Nobutaka Okuyama, Yokohama, JP;
Yoshikazu Naito, Yokohama, JP;
Syuzo Matsumoto, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A projection color television receiver set comprises three picture tubes juxtaposed to one another and producing red, green and blue light images which are projected through respective lenses onto a single screen to be reproduced as a single synthesized color picture. In order that rectangular rasters produced by the picture tubes disposed at both sides of the center picture tube are prevented from being deformed into trapezoidal rasters when projected on the screen, deflecting yokes used in the lateral picture tubes are provided with horizontal deflection winding in such arrangement that trapezoidal rasters are produced on faceplates of the laterally disposed picture tubes, respectively, which rasters are projected in a rectangular form on the single screen in alignment with the rectangular raster produced and projected from the center picture tube, whereby a color picture of an improved quality is reproduced on the screen, involving substantially no misconvergence. Auxiliary deflecting yokes and associated electric circuit of complicated configuration required heretofore to this end are spared.