Color cathode-ray tube

Details Color cathode-ray tube Color cathode-ray tube

2006-03-14

2006-03-14

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S402000, C313S47700R

Reexamination Certificate

active

07012359

ABSTRACT:
The mask body satisfies the following conditions,in-line-formulae description="In-line Formulae" end="lead"?(ZMD−ZMH)/LMS≧0.020, andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.065≦ZMD/LMD≦0.095in-line-formulae description="In-line Formulae" end="tail"?where in a substantially rectangular effective region with a predetermined curvature of the mask body, LMDis a distance between a central part and a diagonal-axis end of the effective region, LMSis a distance between a horizontal-axis end and the diagonal-axis end of the effective region, ZMDis a height difference between the central part and the diagonal-axis end in a direction of the tube axis, and ZMHis a height difference between the central part and the horizontal-axis end in the direction of the tube axis. With this structure, the mechanical strength of the mask body can be improved, and deformation of the mask body in a fabrication process and due to external shock can be prevented.

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