Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1977-11-30
1979-03-06
Segal, Robert
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313414, H01J 2950, H01J 2956
Patent
active
041432932
ABSTRACT:
A color television tube assembly in which the aperture of a control grid of each electron gun is made in the form of an ellipse with its major axis in line with the vertical direction, and the lengths of the vertical and horizontal axes of the aperture of action space of an electron lens electrode are selected different from each other, whereby the beam spot at the center of the screen may become in the form of a vertically elongated ellipse while the beam spots at the horizontal and vertical edges of the screen are in the form of a horizontally elongated ellipse.
REFERENCES:
patent: 3771002 (1973-11-01), Standaart
patent: 3919583 (1975-11-01), Hasker et al.
patent: 3952224 (1976-04-01), Evans
Hosokoshi Kakuichiro
Nakamura Hiroto
Okamoto Takami
Matsushita Electronics Corporation
Segal Robert
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