Color cathode ray tube

Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield

Reexamination Certificate

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Details

C313S403000, C313S408000

Reexamination Certificate

active

07012356

ABSTRACT:
The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, whereinB2P2≤B3P3where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask; B2 is a length of a bridge as a distance between holes in a vertical direction at four corner portions of the shadow mask; B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof; P1 is a vertical pitch of the holes at the center portion of the shadow mask; P2 is a vertical pitch of the holes at the four corner portions of the shadow mask; and P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.

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