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:
Jul. 17, 2001
Filed:
Sep. 21, 1999
NEC Corporation, Tokyo, JP;
Abstract
A ring-formed correction coil for generating a magnetic field is mounted on the cathode side of CPM,provided on the neck portion of a color cathode ray tube, thereby being disposed distant from the deflection yoke. By using the magnetic field generated by supplying a correction current from a control circuit to the correction coil of this arrangement, correction of convergence error of R and G beam horizontal lines are carried out without causing landing transition or raster rotation. Further, since the correction coil is disposed distant from the phosphor screen, a large amount of correction can be assured on the phosphor screen, thereby saving current supplied from the control circuit to the correction coil.