Color picture tube having electron gun with non-linear coma...

Details Color picture tube having electron gun with non-linear coma... Color picture tube having electron gun with non-linear coma...

H - Electricity

01

J

313/35.11

H01J 29/48 (2006.01) H01J 29/50 (2006.01) H01J 29/70 (2006.01) H01J 29/76 (2006.01)

Patent

CA 1138513

RCA 74,410 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 with increasing angles of vertical deflection of the beams, to provide nonlinear coma correction.

363977

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