High voltage generating circuit

Details High voltage generating circuit High voltage generating circuit

1984-04-20

1988-03-01

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315382, 358190, 358243, H01J 2970, H01J 2958, H04N 563, H04N 568

Patent

active

047288680

ABSTRACT:
A circuit for generating a dc high voltage supplied to an anode of a cathode-ray tube, having a simplified circuit structure and reduced size. A first horizontal deflection circuit applies a first flyback pulse across the primary coil of a flyback transformer, while a second horizontal deflection circuit supplies a second flyback pulse to a lower voltage side of the secondary coil of the flyback transformer through a coupling capacitor. A dc voltage supplied to the second horizontal deflection circuit is controlled in response to the output voltage of the secondary coil of the flyback transformer. A current detection circuit for automatic brightness limiting is coupled to the lower voltage side of the secondary coil of the flyback transformer for detecting changes in the secondary current of the flyback transformer.

REFERENCES:
patent: 3745246 (1973-07-01), Kashiwagi
patent: 4144480 (1979-03-01), Nagasaki et al.
patent: 4316128 (1982-02-01), Shiratsuchi
patent: 4343028 (1982-08-01), Hicks

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