Color display tube

Details Color display tube Color display tube

1988-03-04

1990-06-05

Boudreau, Leo H.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, 313407, 313408, H01J 2980

Patent

active

049316893

ABSTRACT:
The invention relates to a color display tube comprising a shadow mask (12) placed in front of the display screen (8). The shadow mask (12), at least on the side remote from the display screen, is coated with a glass layer (14) comprising a heavy metal. The object of such a layer is to reflect electrons incident on it so as to reduce local or overall heating. By means of the glass layer it is achieved that it crumbles away less easily, which inter alia is in favor of the picture quality, and that the shadow mask is more rigid.

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