Display having automatic correction device for horizontal deflec

Details Display having automatic correction device for horizontal deflec Display having automatic correction device for horizontal deflec

1990-05-21

1991-12-03

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, 315394, G09G 104, H01J 2970

Patent

active

050702815

ABSTRACT:
A CRT display including a horizontal deflection circuit. The horizontal deflection coil supplied with a horizontal deflection signal, with inductance L, has an energy-dissipating coil resistance connected in series and hence a second-order distortion expanding the left-hand side of the picture screen of the display and contracting the right-hand side thereof is produced. In the preset invention, to correct for the second-order distortion, the current flowing through the deflection coil means is detected, the deflection distortion component is extracted from the current, and a deflection distortion correcting current corresponding to the deflection distortion is supplied to an auxiliary coil for correcting the horizontal deflection of the electron beam.

REFERENCES:
patent: 4414494 (1983-11-01), Schmidt
patent: 4795946 (1989-01-01), Nishiyama

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