Demagnetization circuit for cathode-ray tube video device

Details Demagnetization circuit for cathode-ray tube video device Demagnetization circuit for cathode-ray tube video device

1998-08-27

2000-07-18

Bettendorf, Justin P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

361150, H04N 929

Patent

active

060911980

ABSTRACT:
A cathode-ray tube video device connected to a power source and having a first normal operating state and at least a second operating state at reduced power (stand-by mode) includes a switching power supply and a circuit portion for demagnetizing the cathode-ray tube coupled to the power source through an electrically actuated switch. The switch is closed to demagnetize the cathode-ray tube during the first operating state of the device, and opened during the second operating state at reduced power of the device.

REFERENCES:
patent: 4441052 (1984-04-01), Willis
patent: 4489253 (1984-12-01), Godawski
patent: 4769577 (1988-09-01), Morrish
patent: 5168195 (1992-12-01), Breidigan et al.

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