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:
May. 26, 1998
Filed:
Oct. 18, 1996
Masanobu Honda, Osaka, JP;
Isao Yonetani, Osaka, JP;
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A color cathode ray tube device is provided in which the generation of the trapezoidal distortion of a rectangular raster is controlled and an off-axis misconvergence is corrected to obtain high image quality in the peripheral portion of a screen. An annular ferrite core is provided adjacently to the electron gun side end face of a ferrite core of a deflection yoke so as to b decentered radially within the predetermined range around the central axis of the deflection yoke in the tube axial direction. An asymmetric magnetic field is formed on the electron gun side of the deflection yoke by the annular ferrite core which has been decentered. Thus, the off-axis misconvergence can be corrected while controlling the generation of the trapezoidal distortion.