| 摘要 |
PURPOSE: A CRT having a tension mask with reinforcing support unit is provided to effectively hold a mask under tension. CONSTITUTION: A color cathode-ray tube(1) comprises a glass front face(2) on which a phosphor screen(13) is deposited, a color selection mask(8) placed close to the screen, a frame(19) to which the mask is attached and which holds the mask under tension in at least one direction, the frame being of substantially rectangular shape defined by a pair of opposed long sides(9) and a pair of short sides(7) which are also opposed, the frame/mask assembly being held inside the front face by support unit. At least two opposed sides of the frame comprise mechanical reinforcing unit in the form of a metal plate fastened to the sides, close to the corners of the frame, the plates comprising a longitudinal dimple lying at least partially in the direction of tension of the mask.
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