Electron guns for color picture tube

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

1994-07-22

1996-04-30

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313439, 313460, H01J 2948

Patent

active

055127975

ABSTRACT:
In-line electron guns for color picture tube improving the resolution of the color picture tube. The guns not only exhibit the special quality of a large aperture of lens but also achieve the desired mechanical strength of electrodes by arranging .OR right.-shaped inner electrode plates in the envelope electrodes respectively. Each of first and second accelerating/focusing electrodes for focusing three electron beams of the electron beam sources on the phosphor screen includes an envelope electrode and an electrostatic field control electrode placed in the envelope electrode. The envelope electrode includes a predetermined length of hollow envelope part and a predetermined width of rim part extending from an edge of the hollow envelope part. The electrostatic field control electrode includes a plate electrode sided by predetermined width of blades at opposed sides thereof. This blade sided plate electrode is holed at its center so as to have a center beam passing opening.

REFERENCES:
patent: 4086513 (1978-04-01), Evans, Jr.
patent: 4208610 (1980-06-01), Schwartz
patent: 4374342 (1983-02-01), Say
patent: 4772827 (1988-09-01), Osakabe
patent: 5128586 (1992-07-01), Ashizaki et al.
patent: 5281892 (1992-01-01), Kweon et al.
patent: 5300855 (1992-04-01), Kweon

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