Beam landing location error correction arrangement

Details Beam landing location error correction arrangement Beam landing location error correction arrangement

1992-04-02

1993-06-08

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

052182754

ABSTRACT:
A horizontal rate parabolic voltage generator is responsive to a reset pulse at the horizontal rate for generating a horizontal rate parabolic voltage that includes a pulse in the vicinity of horizontal retrace. The parabolic voltage is coupled to an auxiliary coil mounted on a cathode ray tube to produce a vertical convergence error correction current. The pulse compensates for a slow response time in an amplifier that drives the auxiliary coil. A horizontal rate sawtooth voltage generator may also be responsive to the reset pulse for including a pulse component in its waveform.

REFERENCES:
patent: 4318032 (1982-03-01), Kureha
patent: 4395662 (1983-07-01), Sexton, Jr.
patent: 4500816 (1985-02-01), Murphy
patent: 4560910 (1985-12-01), Midland
patent: 4675580 (1987-06-01), Dietz
patent: 5034664 (1991-07-01), Fernsler et al.
Copending U.S. patent application Ser. No. 701,725, in the name of Truskalo, entitled An Arrangement for Correcting Beam Landing Location Error in a Video Display.

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