Color picture tube having an inline electron gun with an astigma

Details Color picture tube having an inline electron gun with an astigma Color picture tube having an inline electron gun with an astigma

1990-02-22

1991-11-19

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

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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