High voltage discharge circuit for CRT

Details High voltage discharge circuit for CRT High voltage discharge circuit for CRT

1995-01-13

1997-09-23

Hsia, Sherrie

Television

Cathode-ray tube display excessive voltage control

348378, 348380, H04N 568

Patent

active

056710160

ABSTRACT:
In a high voltage discharge circuit for a CRT, a power-off detecting circuit detects turning off of a power switch and outputs a power-off detection signal, to activate a luminance increasing section to increase the luminance of a video signal being outputted to the CRT at the time the power switch is turned off. Therefore, the high-voltage charges that remain applied between the anode and the cathode of the CRT after the power switch has been turned off discharge rapidly so that occurrence of afterglow can be reliably prevented.

REFERENCES:
patent: 5184225 (1993-02-01), Heidebroek

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