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:
Aug. 27, 1996
Filed:
Dec. 15, 1994
Toshinari Ueyama, Neyagawa, JP;
Nobuyoshi Nagagata, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A horizontal deflection circuit is provided which is useful in a television receiver and a video apparatus using a cathode ray tube, and which generates a deflection current for horizontally deflecting electron beams by changing a magnetic field applied to the cathode ray tube, and in which a resonance circuit using LC parts is not employed, and the vertical line distortion correction and the control of the horizontal deflection current in the multiscan are conducted by changing the duty ratios of switch elements, thereby simplifying the circuit configuration, and reducing the cost and the loss. [CONSTRUCTION] The horizontal deflection circuit has: a series circuit of first and second switch means and connected to positive and negative terminals of a DC power source; a series circuit of a horizontal deflection coil and a first capacitor and connected across the first switch means; control means for controlling closing and opening operations of the first and second switch means; and first and second diodes respectively connected across the first and second switch means. The control means controls the first and second switch means so that the first and second switch means are alternately closed and opened in synchronism with a horizontal synchronizing signal. The control means further controls the first and second switch means so that close and open periods of the first and second switch means are changed in synchronism with a vertical synchronizing signal. Accordingly, a horizontal deflection circuit which is simplified in configuration, minituarized, and reduced in cost and loss is obtained.