Dynamic focus circuit

Details Dynamic focus circuit Dynamic focus circuit

1995-08-08

1998-01-06

Pascal, Robert

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

348806, H01J 2958

Patent

active

057059004

ABSTRACT:
A dynamic focus circuit for a cathode ray tube having a curved screen that corrects clearness difference between the central part and the corners of a screen caused by relative distance difference from an electron gun to the screen. This circuit corrects picture deterioration due to the focal length difference, using dynamic voltages included in vertical and horizontal parabolic wave signals.

REFERENCES:
patent: 4555649 (1985-11-01), Sharma
patent: 5091681 (1992-02-01), Sutton
patent: 5512964 (1996-04-01), Kim

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