Color cathode ray tube and color picture tube apparatus having the same

A color cathode ray tube comprising:

• a vacuum envelope including a substantially rectangular face panel having a substantially flat outer surface and an inner surface with a phosphor screen formed thereon, short and long axes orthogonal to a tube axis and orthogonal to each other, a pair of long sides substantially parallel to the long axis and a pair of short sides substantially parallel to the short axis;
• a shadow mask arranged within the vacuum envelope to face the phosphor screen;
• and
• an electron gun provided within the vacuum envelope, for emitting electron beams onto the phosphor screen through the shadow mask, wherein
• the thickness of the face panel is so formed as to be greater at a peripheral edge portion than at a center portion of the face panel, a curvature radius in the short axis direction on the long axis at the inner surface of the face panel has a minimal value at a position spaced from a center of the face panel more toward the long axis end side than L/2, provided that a distance from the center to the long axis end of the face panel is L, and the face panel satisfies the following relations:
• TD<2.5TC
• TV<2.0TC
• TH<2.0TC
• where
• TC:
• the thickness of the face panel at the center portion;
• TD:
• the thickness of the face panel at a diagonal axis effective dimension end;
• TV:
• The thickness of the face panel at a short axis effective dimension end;
• and
• TH:
• the thickness of the face panel at a long axis effective dimension end.