Color cathode-ray tube with shadow mask having attached vibration attenuator
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTeruhisa Kodama, Tatsuzo Hayashi, Satoshi Ohta, Yoshikazu Demi
Life of this patent
Estimating the term…
Abstract
A vibration attenuator is attached to a shadow mask in a movable condition without being adhered to the shadow mask. The vibration attenuator has depressions, and is attached to the shadow mask by inserting its foot portions through holes provided in the shadow mask, and folding them at the depressions, thereby deforming the vibration attenuator into an approximately rectangular shape. Because a vibration energy of the shadow mask is consumed by friction due to a contacting or sliding of the vibration attenuator with the shadow mask, vibration of the shadow mask can be attenuated effectively with a simple structure.
Claims7
A color cathode-ray tube comprising:
- a mask frame;
- a shadow mask held by the mask frame with a tension being applied to the shadow mask;
- and
- a vibration attenuator that is attached to the shadow mask and moves relative To the shadow mask upon vibration of the shadow mask;
- wherein the vibration attenuator is a member different from the mask frame and is not fixed to the mask frame;
- and
- the vibration attenuator has a depression, and is folded at the depression.
Dependencies are inferred from the claim text.