Electron gun for a color cathode ray tube

Details Electron gun for a color cathode ray tube Electron gun for a color cathode ray tube

1992-01-30

1993-04-27

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

315382, 313414, H01J 2946, H01J 2950, G09G 104

Patent

active

052065618

ABSTRACT:
An electron gun for a color cathode ray tube for realizing a high-quality image includes a triode having a cathode, a control electrode, and a screen electrode, and a main lens system having first to fourth focusing electrodes and an anode. The first focusing electrode and the fourth focusing electrode are electrically connected to each other, and the second focusing electrode and the third focusing electrode are electrically connected to the control electrode and the screen electrode, respectively. By forming a multistep auxiliary lens, the influence of spherical aberration and astigmatism on the electron beams are decreased and, in turn, a high-quality image can be realized.

REFERENCES:
patent: 4825120 (1989-04-01), Takahashi

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