Shadow mask for cathode ray tubes

A shadow mask for cathode ray tubes, the shadow mask having a plurality of slots through which an electron beam passes for sorting colors of the electron beam, wherein

• each of the slots includes a smaller hole part having the narrowest width and a larger hole part facing the panel side of each of the slots, and
• the end of the larger hole part, which is adjacent to the center part of the shadow mask, is protruded toward the center of each of the slots such that an area of each of the slots is decreased to increase the structural strength of the shadow mask, wherein
• the end of the larger hole part, which is adjacent to the center part of the shadow mask, is located nearer to the center part of the shadow mask than the center of the smaller hole part, and
• when the width of the smaller hole part is defined as Sw, and the horizontal distance between the end of the larger hole part, which is adjacent to the center part of the shadow mask, and the center of the smaller hole part is defined as Di,
• the shadow mask is configured such that the following inequality is satisfied:
• 0≦Di≦Sw/2.

A shadow mask for cathode ray tubes, the shadow mask having a plurality of slots through which an electron beam passes for sorting colors of the electron beam, wherein

• each of the slots includes a smaller hole part having the narrowest width and a larger hole part facing the panel side of each of the slots, and
• the end of the larger hole part, which is adjacent to the center part of the shadow mask, is protruded toward the center of each of the slots such that an area of each of the slots is decreased to increase the structural strength of the shadow mask, wherein
• the end of the larger hole part, which is adjacent to the center part of the shadow mask, is located nearer to the edge part of the shadow mask than the center of the smaller hole part, and
• when the width of the smaller hole part is defined as Sw, and the width of the larger hole part is defined as D,
• the shadow mask is configured such that the following inequality is satisfied:
• D≧Sw.