Colour display tube

Details Colour display tube Colour display tube

H - Electricity

01

J

316/12, 313/35.1

H01J 29/07 (2006.01) H01J 9/14 (2006.01)

Patent

CA 1229121

ABSTRACT The invention relates to a colour 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) containing a heavy metal. The object of such a layer (14) is to reflect electrons incident on it so as to reduce local or overall heating. When the heavy metal-containing layer is a glass layer, this layer has a smaller tendency to form particles than does a non- vitreous layer of a compound of a heavy metal. This is in favour of the picture quality, and the shadow mask is more rigid.

478667

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