| 摘要 |
Disclosed is a cathode ray tube including a white emitting phosphor screen comprising, in mixing, a blue emitting phosphor having the composition expressed by a composition formula (M1-x Tbx)2O2S (wherein M is Y and/or Gd, and the range of x is 0<x</=0.01) and at least one other phosphor which does not contain Cd. This cathode ray tube has less luminance deterioration and burning of the phosphor screen, and it causes no pollution.
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