Stray emission prevention circuit for cathode ray tube

Details Stray emission prevention circuit for cathode ray tube Stray emission prevention circuit for cathode ray tube

1992-09-17

1993-11-30

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315380, 315409, 358190, H01J 2970, G09G 104, H04N 563

Patent

active

052668703

ABSTRACT:
A stray emission prevention circuit for a system having a cathode ray tube including a charging and discharging section for applying a system power supply voltage upon power-on of the system to charge with a constant voltage and for discharging the charged voltage upon power-off of the system, and a switching section for forming an open circuit between a high voltage unit of the cathode ray tube and a ground upon the power-on of the system and forming a closed circuit therebetween upon the power-off of the system to discharge the residual high voltage in the cathode ray tube, the circuit being provided on a circuit board of the system.

REFERENCES:
patent: 4689684 (1987-08-01), Inashima et al.
patent: 4723167 (1988-02-01), Griffey

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