Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1997-05-02
1999-05-04
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315411, G09G 104, H01J 2970
Patent
active
059007028
ABSTRACT:
A display device includes a capacitor which charges or discharges, and an oscillation voltage stabilizing circuit, which prevents an abnormal oscillation by constantly maintaining the oscillation voltage of a pulse width modulation circuit which oscillates according to a time constant of a resistor. The oscillation voltage stabilizing circuit consists of: a pulse input circuit, for detecting a high voltage induced to an output transformer; a forced trigger circuit, for inverting and amplifying a pulse transmitted from the pulse input circuit, and transmitting it to a capacitor of the pulse width modulation circuit; a charge storage device, connected to a trigger terminal of the forced trigger circuit; a signal converter, for converting the output signal of the forced trigger circuit into a voltage; a voltage comparator having a first switching device which is opened or closed in accordance with the voltage transmitted from the signal converter; a control circuit having a second switching device which is opened or closed according to a state of the voltage comparator; and a resistor circuit, for varying its resistance in response to a control signal transmitted from the control circuit.
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Bushnell Esq. Robert E.
Issing Gregory C.
Samsung Electronics Co,. Ltd.
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