Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

2005-07-19

2005-07-19

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

C313S412000

Reexamination Certificate

active

06919675

ABSTRACT:
In an electron gun including a cathode, a control electrode, an acceleration electrode G2,a focusing electrode G3and an anode, longitudinally elongated concave SL-V which surround an electron beam aperture G2-H and have a long axis in the vertical direction is formed at a focusing electrode G3side of the acceleration electrode G2,and an electron beam aperture G3-BH formed at the acceleration electrode G2side of the focusing electrode G3is formed in a longitudinally elongated shape having a long axis in the vertical direction. Due to such a constitution of the present invention, non-uniformity of the beam spot shape attributed to a deflection quantity can be reduced whereby the optimum focusing can be realized over the whole area of a screen.

REFERENCES:
patent: 5600201 (1997-02-01), Yun et al.
patent: 6825621 (2004-11-01), Song et al.

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