Color display tube having screen with sharply curved surfaces

Details Color display tube having screen with sharply curved surfaces Color display tube having screen with sharply curved surfaces

1984-05-04

1986-05-27

Willis, Davis L.

Electric lamp and discharge devices

Cathode ray tube

Screen

313474, 220 21A, 358255, H01J 2910, H01J 6130, H04N 564

Patent

active

045917574

ABSTRACT:
A color display tube comprising a faceplate including a display window connected to a skirt which is substantially parallel to the axis of the envelope via a sharply curved transition portion. The set of points defining where the inner surface of the window meets the inner surface of the transition part is formed by a closed line l. The set of points defining where the outer surface of the window meets the outer surface of the transition portion is formed by a closed line m. A display screen of luminescent material provided on the inner surface of the display window has a substantially rectangular boundary which coincides substantially with the line l. A large viewing angle .alpha. is obtained within which no distortion of the picture edge occurs when, from any point Q in the line m, the shortest connection line to the line l encloses with a normal line h (normal to the outer surface of the window) an angle .gamma., for which the relationship holds that:

REFERENCES:
patent: 3089052 (1963-05-01), Bisbing

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