Color image display systems

Details Color image display systems Color image display systems

H - Electricity

01

J

313/35.1203

H01J 29/48 (2006.01) H01J 29/51 (2006.01) H01J 29/56 (2006.01) H01J 29/62 (2006.01)

Patent

CA 1213304

- 30 - Abstract Compact deflection yoke in self-converging display system encircles adjoining segments of neck and funnel sections of color picture tube having close beam spacing (200 mils) in electron gun to achieve low S-spacing dimension between converging beams in deflection center plane. Neck diameter is sufficiently large (1145 mils) to accommodate main focusing lens having major transverse dimension more than three and half times the beam spacing in the electron gun. Main focusing lens is formed between final focus electrodes having recessed apertures at juxtaposed ends. Walls of successive recesses have "racetrack"-like and "dogbone"-like contours. Asymmetric beam forming lenses provide each beam traversing the main focusing lens with asymmetric cross-section having relatively reduced vertical dimension.

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