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:
Sep. 24, 2002
Filed:
Dec. 22, 1999
Toshiya Takagishi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a convergence correction device according to the present invention and a cathode-ray tube using such convergence correction device, a core having wound thereat a vertical correction coil (M/Dv) to which a vertical deflection current is applied is used while such core is being saturated. Also, such core might be made of a material having a characteristic in which a changed amount of a reactance per deflection velocity becomes less than a predetermined value. The above-mentioned predetermined value is less than 2000 &mgr;H/msec, for example. Thus, a convergence pattern, which is difficult to correct at the intermediate portions of upper and lower separated screens of a cathode-ray tube according to the related art, may be satisfactorily corrected without producing bright and dark stripes on the screen of the cathode-ray tube.