Cathode ray tube with improved focusing characteristics

Details Cathode ray tube with improved focusing characteristics Cathode ray tube with improved focusing characteristics

1992-12-29

1995-01-24

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313412, 313414, 313425, 335210, H01J 2946

Patent

active

053845137

ABSTRACT:
Disclosure relates to a cathode ray tube formed in the neck portion of a funnel, which comprises an electron gun including a cathode, a control electrode and a screen electrode constituting a triode, and a magnetic substance formed between the cathode and the control electrode to focus the electron beam on the control electrode, so that the electron beam emitted from the cathode ray tube is focused toward an electron beam passing hole of the control electrode to improve the focussing characteristics and current density of the electron beam.

REFERENCES:
patent: 2372443 (1945-03-01), Marton
patent: 4345183 (1982-08-01), Fukuda
patent: 4439710 (1984-03-01), Osakabe et al.
patent: 4460844 (1984-07-01), Sakurai et al.
patent: 4473773 (1984-09-01), Sakurai et al.
patent: 4490644 (1984-12-01), Shimoma et al.
patent: 5254903 (1993-10-01), Jo et al.
patent: 5256933 (1993-10-01), Jeon

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