Video apparatus deflection loss protection

Details Video apparatus deflection loss protection Video apparatus deflection loss protection

1986-11-04

1988-04-12

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, 358243, H01J 2970, H04N 563, H04N 568

Patent

active

047376945

ABSTRACT:
In a video display apparatus, the high voltage generating circuitry responds to trigger pulses derived from horizontal deflection retrace-related pulses. During normal horizontal deflection operation, the trigger pulses produced are of sufficient amplitude to cause normal triggering of the high voltage generating circuits resulting in normal high voltage levels being produced. Under abnormal horizontal deflection operation in which the horizontal deflection current is not produced, the trigger pulses will be of insufficient amplitude to trigger the high voltage generating circuit, and hence no high voltage level is produced.

REFERENCES:
patent: 4047078 (1977-09-01), Meehan

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