Dynamic focus circuit

Details Dynamic focus circuit Dynamic focus circuit

H - Electricity

01

J

H01J 29/98 (2006.01) H04N 3/26 (2006.01)

Patent

CA 2155452

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.

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