Convergence control system for multigun CRT

Details Convergence control system for multigun CRT Convergence control system for multigun CRT

1982-04-15

1985-06-18

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970

Patent

active

045243077

ABSTRACT:
A convergence control system suited for use with high resolution color display monitors or color television receivers. The system includes both primary and secondary convergence controls having minimal interaction between them. An exemplified convergence control system comprises circuitry designed to develop output signal waveforms for implementing the following expression: ##EQU1## where X is a horizontal deflection-related signal input to the system, K is a static control for adjusting convergence at the center of the CRT screen, K3 and K4 are left and right side convergence controls, and K1 and K2 are secondary controls for correcting residual misconvergence--i.e., misconvergence at areas of the screen intermediate the areas converged using the K, K3 and K4 controls. A similar system is provided for providing vertical deflection-related convergence waveforms.

REFERENCES:
patent: 3501669 (1970-03-01), Henderson
patent: 3891889 (1975-06-01), Fazio
patent: 3942067 (1976-03-01), Cawood

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