Deflection and high voltage circuit

Details Deflection and high voltage circuit Deflection and high voltage circuit

1993-03-12

1994-10-18

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315408, 315371, 363 21, H01J 2970

Patent

active

053571754

ABSTRACT:
A deflection and high voltage circuit produces a proper luminance level and a focusing performance in a CRT image irrespectively of changes in a luminance signal level. The circuit is provided with a voltage control circuit for controlling an output voltage level of a voltage supply circuit according to changes in the anode voltage of the CRT so that a voltage obtained by rectifying a voltage generated by the secondary winding of flyback transformer, i.e., the anode voltage of the CRT is made constant. Furthermore, the circuit is provided with a correction circuit for preventing a voltage across the terminals of a S-curve correction capacitor determining the H-size of the CRT image from being affected by the variation of the output voltage level of the voltage supply circuit.

REFERENCES:
patent: 4814672 (1989-03-01), Dieterle et al.
patent: 4900988 (1990-02-01), Yuk
patent: 5016156 (1991-05-01), Ogawa
patent: 5059874 (1991-10-01), Oliver

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