Colour display tube

Details Colour display tube Colour display tube

H - Electricity

01

J

313/35.19

H01J 29/86 (2006.01) H01J 29/06 (2006.01)

Patent

CA 1220810

PHN 10 877 9 ABSTRACT: A colour display tube comprising an envelope con- sisting of a neck, a cone, and a flat or slightly curved display window having a skirt which is substantially par- allel to the axis of the envelope, the inner surface of the display window changing into the inner surface of the skirt via a strongly curved surface, the display window comprising on its inside a substantially rectangular dis- play screen having a material luminescing in at least one colour and over which an aluminium film is provided, means being provided in the neck to generate at least one elec- tron beam. By causing the outer circumference in such a tube to extend substantially parallel to the boundary of the luminescent material of the display window and the camber Image of the sides of the boundary outwards is smaller than 0.01, b' being the distance measured along a straight line between the corners of the boundary, and a' being the maximum distance from the boundary to the line, a display tube is obtained having a uniform substantially rectangular edge around the display screen.

468847

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