Color picture tube having an inline electron gun with an astigma

Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control

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Details

313412, 313460, H01J 2950

Patent

active

050668870

ABSTRACT:
A color picture tube includes an inline electron gun for generating and directing three inline electron beams along coplanar beam paths toward a screen. The gun includes a plurality of electrodes which form a beam-forming region, a prefocusing lens, and a main focusing lens for the electron beams. The prefocusing lens includes four active surfaces. At least one of the active surfaces has asymmetric prefocusing recesses formed therein.

REFERENCES:
patent: 4234814 (1980-11-01), Chen et al.
patent: 4319163 (1982-03-01), Chen
patent: 4370592 (1983-01-01), Hughes et al.
patent: 4388552 (1983-06-01), Greninger
patent: 4429252 (1984-01-01), Vieland et al.
patent: 4520292 (1985-05-01), van Hekken et al.
patent: 4528476 (1985-07-01), Alig
patent: 4608515 (1986-08-01), Chen
patent: 4631058 (1987-02-01), Koshigoe et al.
patent: 4731563 (1988-03-01), Bloom et al.
patent: 4764704 (1988-08-01), New et al.
patent: 4877998 (1989-10-01), Maninger et al.
S. Shirai, M. Fukushima, S. Miyamoto, M. Miyazaki, "Quadrupole Lens For Dynamic Focus And Astigmatism Control In An Elliptical Aperture Lens Gun", SID Digest, (1987), pp. 162-165.
T. Katsuma, E. Hamano, T. Shimaohgi, N. Umezu, "Dynamic Astigmatism Control Quadra Potential Focus Gun For 21-in. Flat Square Color Display Tube", SID Digest, (1988), pp. 136-139.

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