Method and circuit for generating the control voltages of the dy

Details Method and circuit for generating the control voltages of the dy Method and circuit for generating the control voltages of the dy

1992-10-29

1994-10-04

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536812, H01J 2951, G09G 128

Patent

active

053529596

ABSTRACT:
A method and a circuit for generating the control voltages of the dynamic convergence in a color display tube, in which the current of the convergence coils (HC, VC) is controlled. The control voltages for the convergence coils (HC, VC) are obtained from several controlling means (1-16). A voltage independent of the horizontal and vertical deflection frequencies is switched to the control means.(1-16). The voltage from each controlling means (1-16) is switched to the coils (HC, VC) by signals (f.sub.ch, f.sub.cv) synchronized to the horizontal and vertical deflection pulses (f.sub.h, f.sub.v), whereby the convergence of different parts (a1-a16) of the display is controlled by a voltage provided by a separate controlling means (1-16).

REFERENCES:
patent: 4095137 (1978-06-01), Oswald
patent: 4672275 (1987-06-01), Ando

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