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. 09, 2000
Filed:
Oct. 07, 1997
Masahisa Tsukahara, Fujisawa, JP;
Toshimitsu Watanabe, Yokohama, JP;
Makoto Kitamura, Yokohama, JP;
Takeshi Mochizuki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Video and Information Systems, Inc., Kanagawa-ken, JP;
Abstract
A raster distortion correction and deflection circuit arrangement includes a deflection coil adapted to be mounted on a cathode ray tube, a horizontal deflection coil driving circuit for passing a current of saw-tooth waveform of a horizontal deflection period through a horizontal deflection coil constituting the deflection coil, a flyback transformer the primary winding of which is connected between a power supply and an output terminal of the horizontal deflection coil driving circuit, an S-correction capacitor connected in series with the horizontal deflection coil, and an anode voltage detection circuit for detecting variations in an anode voltage of the cathode ray tube which is a secondary winding output of the flyback transformer. A raster distortion correction current based on an output voltage of the anode voltage detection circuit is injected into a connection point of the horizontal deflection coil and the S-correction capacitor. A signal from a signal detection circuit for ABL connected to the flyback transformer can be employed together with an output of the anode voltage detection circuit or in substitution for it for generating the raster distortion correction current.