| 摘要 |
A color cathode ray tube, having a panel portion including a shadow mask structure, a neck portion housing an electron gun and a funnel portion connecting the panel portion and neck portion. The shadow mask structure having a plurality of electron beam passing holes, a substantially rectangular support frame for holding the shadow mask, and at least three of mask springs which are fixed outside wall of side of the substantially rectangular support frame. The mask springs have holding hole to the panel pins, respectively, the portion of the holding hole of the mask spring shift from the fixed portion on outside wall of said rectangular support frame. The mask spring has a value of coefficient of thermal expansion which is from 1.2 to 2.0 times as great as the coefficient of thermal expansion of the support frame.
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