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

1993-02-16

1994-08-23

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 14, 313414, G09G 104, H01J 2946, H01J 2950

Patent

active

053410700

ABSTRACT:
An electron gun for a color cathode ray tube includes a cathode, a control electrode and a screen electrode constituting a prepositioned triode. First, second, third and fourth focus electrodes form two pre-focus lenses and a final accelerating electrode positioned adjacent to the fourth focus electrode forms a main focus lens. The first pre-focus lens is synchronous with a deflection signal. Variation of the focussing intensity of the main focus lens is compensated for by the first pre-focus lens.

REFERENCES:
patent: 5025189 (1991-06-01), Son
patent: 5036258 (1991-07-01), Chen et al.
patent: 5038073 (1991-08-01), Son
patent: 5066887 (1991-11-01), New
patent: 5164640 (1992-11-01), Son et al.

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