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US 6,919,675 B2Granted
Color cathode ray tube
AssigneeHitachi, Ltd.
InventorsGo Uchida, Kenichi Watanabe, Shoji Shirai, Kazunari Noguchi
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AssigneeHitachi, Ltd.
InventorsGo Uchida, Kenichi Watanabe, Shoji Shirai, Kazunari Noguchi
Estimating the term…
In an electron gun including a cathode, a control electrode, an acceleration electrode G2, a focusing electrode G3 and 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 G3 side of the acceleration electrode G2, and an electron beam aperture G3-BH formed at the acceleration electrode G2 side of the focusing electrode G3 is 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.
A color cathode ray tube comprising a vacuum envelope which includes a panel portion having a phosphor screen on an inner surface thereof, a neck portion housing an electron gun and a funnel portion connecting the panel portion and the neck portion, and a deflection yoke which is mounted on an outer portion where the neck portion is jointed to the funnel portion, wherein
A color cathode ray tube comprising a vacuum envelope which includes a panel portion having a phosphor screen on an inner surface thereof, a neck portion housing an electron gun and a funnel portion connecting the panel portion and the neck portion, and a deflection yoke which is mounted on an outer portion where the neck portion is jointed to the funnel portion, wherein
Dependencies are inferred from the claim text.