Electron gun for in-line color cathode ray tube having different

Details Electron gun for in-line color cathode ray tube having different Electron gun for in-line color cathode ray tube having different

1997-06-24

2000-02-29

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2948

Patent

active

060313250

ABSTRACT:
A focus electrode of an electron gun for color cathode ray tubes of the present invention is divided into at least two focus electrodes, three electron beam passage apertures are provided on each focus electrode, electron beam passage apertures disposed on the one end sides of at least one focus electrodes have different astigmatism respectively from electron beam passage apertures disposed on the other end sides, electron beam passage apertures disposed on both sides of the focus electrode have different astigmatism from electron beam passage apertures disposed on both sides facing each other of the adjacent focus electrodes, the electron beam passage apertures disposed at the center of the respective focus electrodes are shielded. The invention provides an in-line three beam type electron gun for color cathode ray tubes which is capable of equalizing the beam spot configuration of three electron beams on the right and left ends of the fluorescent screen.

REFERENCES:
patent: 2834911 (1958-05-01), Nelson
patent: 4704565 (1987-11-01), Blacker, Jr. et al.
patent: 5027043 (1991-06-01), Chen et al.
patent: 5113112 (1992-05-01), Shimona et al.

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