Vertical deflection circuit for CRT display device

Details Vertical deflection circuit for CRT display device Vertical deflection circuit for CRT display device

1990-04-26

1991-04-23

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, 315389, H01J 2970, H01J 2972

Patent

active

050102800

ABSTRACT:
A vertical deflection circuit for a CRT display device comprises a first negative feedback circuit for detecting a vertical deflection current flowing through a vertical deflection coil feeding it back to a ramp wave generator to thereby stabilize a vertical size of the display image on the CRT screen, second negative feedback circuit connected between the deflection coil to an input of the output circuit for detecting a mean vertical deflection current which is fedback to an output circuit to thereby stabilize a vertical position of the display image on the CRT screen and a controlling circuit for controlling feedback amount of the first and second negative feedback circuits to thereby regulate a vertical size and a vertical position of the display image on the CRT screen variably.

REFERENCES:
patent: 4188567 (1980-02-01), Monroe
patent: 4692670 (1987-09-01), Imaizumi
patent: 4810940 (1989-03-01), Ogino et al.

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