High-voltage stabilization circuit of a monitor

Details High-voltage stabilization circuit of a monitor High-voltage stabilization circuit of a monitor

1996-05-30

1997-12-16

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 78, 363 95, 315411, H02J 100

Patent

active

056992360

ABSTRACT:
A high-voltage stabilization circuit of a monitor can detect accurately a change of a high voltage of a secondary winding of a high-voltage transformer. The high-voltage stabilization circuit of a monitor including a high-voltage transformer for inputting the plurality of signals and outputting the plurality of voltages; a high-voltage signal output circuit for rectifying a first output voltage among the plurality of outputted voltages, and for supplying the first output voltage to a cathode ray tube; a detection circuit for inputting a second output voltage lowest voltage among the plurality of outputted voltages and a third output voltage greater than the second output voltage and lowest among the plurality of outputted voltages, and for outputting an average voltage of the second output voltage and the third output voltage as a detection signal; and a control circuit for inputting a first signal from outside and a detection signal of the detection circuit, and for generating a first input signal among the plurality of input signals by varying a duty ratio of the first signal by controlling the first signal according to the detection signal. The change of a first output voltage of a high-voltage transformer can be detected accurately by a direct sensing from a high-voltage transformer.

REFERENCES:
patent: 4677534 (1987-06-01), Okochi
patent: 4823248 (1989-04-01), Ikeuchi et al.
patent: 5354972 (1994-10-01), Han
patent: 5572413 (1996-11-01), Hirahara

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