| 摘要 |
PURPOSE:To provide a cathode ray tube having low shadow luminance and high green monochromatic luminance, which comprises a panel having a particular green luminescent phosphor deposited thereon and an electron gun adapted for projecting an electron beam against the panel. CONSTITUTION:A layer contg. 0.005-1.0pts.wt. (in terms of cobalt atom) cobalt oxide and 0.1-5ppm of nickel is provided on the surface of 100pts.wt. matrix phosphor comprised of at least one member selected from a zinc (cadmium) sulfide phosphor activated with copper and aluminum and a zinc sulfide phosphor activated with copper, gold, and aluminum to obtain a green luminescent phosphor. A shadow mask 9 having an opening 8 is disposed opposite to the inside of a panel 3 having a phosphor layer 7 formed on the inside thereof and comprised of a red luminescent phosphor, a blue luminescent phosphor and the green luminescent phosphor which have been regularly deposited, while an electron gun 6 is disposed within a neck 5 of an enclosure comprised of the panel 3, a funnel 4, and a neck 5.
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