| 摘要 |
A color picture tube fitted with a phosphor screen formed of a green-emitting phosphor prepared from copper and aluminum-activated zinc sulfide, a red-emitting phosphor prepared from europium-activated yttrium oxysulfide, and a blue-emitting phosphor prepared from silver-activated zinc sulfide, and wherein the copper concentration ranges between 0.01 and 0.03% by weight and the europium concentration ranges between 5.1 and 6.1% by weight.
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