Electron guns for color picture tube

Details Electron guns for color picture tube Electron guns for color picture tube

1997-07-09

1998-04-07

Patel, Nimeshkumar

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, 313449, H01J 2958

Patent

active

057368120

ABSTRACT:
Electron guns for color picture tube capable of strengthening the refracting action of electrostatic prisms and of overcoming possible distortion of three electron beams at about the periphery of a screen due to strong nonuniform magnetic field are disclosed. The electron guns has variable asymmetric electrostatic lenses, which lenses include first and second focusing electrodes, a first electrostatic deflection electrode mounted to the first focusing electrode, a second electrostatic deflection electrode mounted to the second focusing electrode, and an accelerating electrode placed in front of the second focusing electrode. In another embodiment, the variable asymmetric electrostatic lenses of the electron guns includes electrostatic deflection means placed between the first and second focusing electrodes.

REFERENCES:
patent: 4704565 (1987-11-01), Blacker, Jr. et al.
patent: 4772827 (1988-09-01), Osakabe
patent: 4877998 (1989-10-01), Maninger et al.
patent: 5281892 (1994-01-01), Kweon et al.

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