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. 15, 1992
Filed:
Feb. 12, 1991
Soichi Sakurai, Yokohama, JP;
Masaki Nakahara, Chigasaki, JP;
Takahisa Mizuta, Yokohama, JP;
Nobutaka Okuyama, Yokohama, JP;
Michitaka Ohsawa, Fujisawa, JP;
Ichiro Niitsu, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Mizusawa Electronics Co., Ltd., Iwate, JP;
Abstract
A system for generating magnetic fields to converge a plurality of electron beams in a cathode-ray tube including at least one convergence yoke having a core with a ring-shaped outer periphery and a plurality of magnetic poles on an inner periphery thereof extending toward a neck part of the cathode-ray tube for forming magnetic paths therewith. A lateral line comma aberration correcting coil arrangement is provided with at least a first coil wound on at least one of the plurality of magnetic poles of the at least one convergence yoke and a first driving circuit connected to the first coil for enabling generation of a magnetic field to correct misconvergence in a lateral line direction on a fluorescent face of the cathode-ray tube, and a longitudinal line correction coil arrangement is provided with at least a second coil wound on the at least one of the plurality of magnetic poles of the at least one convergence yoke and a second driving circuit connected to the at least second coil for enabling generation of a magnetic field to correct misconvergence in a longitudinal line direction on the fluorescent face of the cathode-ray tube.