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:
Apr. 18, 1989
Filed:
Apr. 05, 1988
Hiroshi Ikeuchi, Nagaokakyo, JP;
Nobuaki Imamura, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
High voltage generators are generally arranged to step up flyback pulses from a horizontal deflection circuit by means of a flyback transformer consisting of a primary low voltage coil and a secondary high voltage coil, rectifying the high voltage output through a rectification circuit for application to the anode of a cathode-ray tube. However, such a flyback transformer construction has an inherent drawback that the voltage of the high voltage output is varied by variations in the high voltage output current due to leakage inductance, resulting in load fluctuations. To overcome this problem, the high voltage generator is provided with a tertiary coil for generating an output voltage corresponding to 1/n of the maximum variation of the load fluctuations, a summing control circuit for controlling the rate of the high voltage output to be additively supplied to the secondary coil from the tertiary coil on the basis of a variation detection signal from a high voltage, variation detector circuit which serves to detect the load fluctuations, and a multiplying circuit for multiplying the voltage received from the summing control circuit by n-times for supply to the low voltage end of the secondary coil, thereby stabilizing the voltage of the high voltage output substantially at a constant level irrespective of the variations in the high voltage output current.