Color picture tube having improved electron gun

Details Color picture tube having improved electron gun Color picture tube having improved electron gun

1979-11-15

1987-01-06

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313409, 313412, B65B 2102

Patent

active

046349235

ABSTRACT:
An improved color picture tube has an inline electron gun for generating and directing three electron beams, comprising a center beam and two outer beams, along coplanar paths toward a screen of the tube. The three beams pass through a deflection zone adapted to have vertical and horizontal magnetic deflection fields established therein. The improvement comprises the inclusion of means for nonlinearly increasing the effect of the vertical magnetic deflection field on the center beam relative to the outer beams with increasing angles of vertical deflection of the beams.

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