Electric lamp and discharge devices: systems – Cathode ray tube circuits – Plural concentrating – accelerating – and/or de-accelerating...
Patent
1979-09-24
1982-03-02
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Plural concentrating, accelerating, and/or de-accelerating...
313449, H01J 2946, H01J 2956
Patent
active
043180272
ABSTRACT:
The electron gun, which is especially adapted for use in color picture tubes, comprises in the order named: a cathode, an apertured-plate control grid (G1), an apertured-plate screen grid (G2), and at least two tubular focusing electrodes. The quality of the gun's beam spot is improved by: 1. Establishing an operating electric field between the G2 and G3 which is between about 100 and 400 volts/mil, thereby reducing aberration effects in the beam-forming region of the gun; 2. Making the G2 thick so as to prevent the high G3 voltage from penetrating the region between the G1 and G2, thereby allowing the G1-G2 field to provide a divergent effect on the electron beam prior to beam crossover and thus give a reduced crossover angle; 3. Spacing the main focusing lens at a distance from the G2 so as to provide an optimum filling of the main focus lens with the beam to maximize the object distance of the focusing system; and 4. Structuring the G2 and G3 to provide a flat electrostatic field therebetween to avoid prefocusing action in that region, so as not to cause an effective reduction of the object distance of the focusing system.
REFERENCES:
patent: B381074 (1975-01-01), Hasker et al.
patent: 3008064 (1961-11-01), Niklas et al.
patent: 3090882 (1963-05-01), Benway
patent: 3295001 (1966-12-01), Burdick et al.
patent: 3374379 (1968-03-01), Maruyama et al.
patent: 3437868 (1969-04-01), Ohkoshi et al.
patent: 3772554 (1973-11-01), Hughes
patent: 3866081 (1975-02-01), Hasker et al.
patent: 3873878 (1975-03-01), Odenthal
patent: 3995194 (1976-11-01), Blacker, Jr. et al.
H. Moss, Narrow Angle Electron Guns and Cathode Ray Tubes, Academic Press, N.Y., 1968, pp. 156-158.
Takenaka et al, New Hi-Fi Focus Electron Gun for Color Cathode Ray Tube, Toshiba Review, No. 121, May 1979, pp. 30-35.
Chen Hsing-Yao
Hughes Richard H.
Blum Theodore M.
Bruestle Glenn H.
Irlbeck Dennis H.
RCA Corporation
Whitacre Eugene M.
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