Dynamic focusing electron gun

Details Dynamic focusing electron gun Dynamic focusing electron gun

1993-10-26

1995-03-21

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

3153821, H01J 2958

Patent

active

053999460

ABSTRACT:
In a dynamic focus electron gun, a horizontal dynamic focus voltage is varied according to those portions of a screen where the electron beam arrives and is applied so that the peak-to-peak amplitude of the horizontal dynamic focus voltage in one horizontal deflection period for the upper and lower portions of the screen is greater than that for the screen's center, thereby accomplishing uniform beam spots throughout the screen.

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