| 摘要 |
The present invention discloses a mask frame assembly in a cathode ray tube which is capable of minimizing a Howling phenomenon and preventing local wrinkles of a shadow mask by optimizing positioning of compression of the mask frame assembly. The present invention provides a mask frame assembly for applying optimal tension in a cathode ray tube including a shadow mask for selecting color and a frame assembly having a main frame for applying tension to the shadow mask and a sub-frame for supporting the main frame, wherein each of compression points of the main frame is set to satisfy the following expressions, (L/2)x0.38<=X1<=(L/2)x0.52, and (L/2)x0.80<=X2<=(L/2)x0.98, where L is a length of long side of the main frame, X1 and X2 are distances from the center of the main frame to each of compression points P1 and P2 in both sides. In addition, the present invention provides a mask frame assembly for applying optimal tension in a cathode ray tube including a shadow mask for selecting color and a frame assembly having a main frame for applying tension to the shadow mask and a sub-frame for supporting the main frame, wherein both ends of the main frame are compressed for welding the shadow mask, and compression position of both ends of the main frame is set between an extension line of inner side ends of welding portions of the main frame and the sub-frame and a line perpendicular to an extension line of non-effective area ends of the sub-frame of the shadow mask.
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