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:
Feb. 17, 1998
Filed:
Aug. 07, 1996
Masanobu Honda, Osaka, JP;
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A cathode ray tube display which has improved image quality at the periphery of the screen is achieved by correcting the top-and-bottom or right-and-left trapezoid distortion of a rectangular-shaped raster with a simple and inexpensive method of mounting a magnet in a deflection yoke. A magnet is located in an area extending from a screen side opening end of a ferrite core of a deflection yoke located at the rear periphery of a cathode ray tube to the screen side end of an insulating frame. The magnet is located so that the direction of the magnetic poles substantially conforms to the direction of the tube axis. In addition, the magnet is located so that the center line of the magnet is positioned on a plane which includes the vertical axis and tube axis of the cathode ray tube for the correction of top-and-bottom trapezoid distortion and on a plane which includes the horizontal axis and tube axis of the cathode ray tube for the correction of right-and-left trapezoid distortion.