Method of manufacturing of color display tube

Details Method of manufacturing of color display tube Method of manufacturing of color display tube

1989-08-04

1990-08-21

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With testing or adjusting

445 30, 219 64, H01J 944

Patent

active

049501925

ABSTRACT:
A method of manufacturing a color display tube in which after the envelope is formed the shadow mask is displaced relative to the display window via movable positioning members provided in the envelope. After the color display tube is assembled a test pattern is displayed on the display screen and is optimized by means of positioning members 23, such that the shadow mask is accurately aligned relative to the display screen 6. The adjusted position is fixed by forming a number of welds, using a laser 33, between the connection means 12 and the support elements 10 in the display window 1.

REFERENCES:
patent: 3643299 (1972-02-01), Brown
patent: 4663561 (1987-05-01), Brunn
patent: 4854905 (1989-08-01), Shibuya et al.
patent: 4866334 (1989-09-01), Fendley et al.

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