Constant horizontal dimension symmetrical beam in-line electron

Details Constant horizontal dimension symmetrical beam in-line electron Constant horizontal dimension symmetrical beam in-line electron

1991-12-30

1992-12-08

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536815, 313412, 313428, H01J 2951, H01J 2950, H01J 2970

Patent

active

051701014

ABSTRACT:
A three beam, in-line, color CRT electron gun is disclosed for use in high resolution tubes with self convergent yokes. The dynamic quadrupole and main lenses of the gun are complementary to provide emitted beams that are radially symmetrical and of like size and shape, and of constant horizontal dimension and focal length throughout the deflection cycle, thus letting the yoke provide for the correct beam focus upon deflection. Vertical emitted-beam dimension is balanced against the yoke compressive force and the increased deflected beam throw distance to provide well-controlled spot sizes.

REFERENCES:
patent: 4388552 (1983-06-01), Greninger
patent: 4701677 (1987-10-01), Ashizaki et al.
patent: 4800318 (1989-01-01), Naiki
patent: 4967120 (1990-10-01), Katsuma et al.
patent: 5017843 (1991-05-01), Barten
"A New Picture-Tube System With Homogenous Spot Performance", Gerritsen et al., Proceedings of the SID, vol. 31/3, pp. 179-183, 1990.
"An In-Line Color CRT With Dynamic Beam Shaping For Data Display", Yamane et al., Proceedings of the SID, vol. 29/1, pp. 41-45, 1988.
"Progressive-Scanned 33"110.degree. Flat-Square Color CRT", Suzuki et al, Proceedings of the SID, vol. 28/4, pp. 403-407, 1987.
"In-Line Gun With Dynamic Astigmatism and Focus Correction" Ashizaki et al, Proceedings of the SID, vol. 29/1, pp. 33-39, 1988.

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