Method of testing a panel assembly of a color cathode-ray tube

Details Method of testing a panel assembly of a color cathode-ray tube Method of testing a panel assembly of a color cathode-ray tube

1984-11-13

1986-04-22

Fields, Carolyn E.

Radiant energy

Luminophor irradiation

Methods

2504611, 2504861, 354 1, 445 63, G01N 2164, H01J 9227, H01J 942

Patent

active

045844810

ABSTRACT:
A method of testing a panel assembly of a color cathode-ray tube, prior to sealing a faceplate panel of the assembly to a funnel section of the tube, detects defects in the assembly including dents and misregistration of an apertured shadow mask mounted therein adjacent to a luminescent screen disposed on the faceplate panel. The screen is exposed to radiation passed through apertures in the mask including ultraviolet but substantially excluding visible radiation, and examined for variations in color from light emitted by the screen, whereby the variations in color are indicative of defects in the assembly.

REFERENCES:
patent: 3514208 (1970-05-01), Levin
patent: 3522432 (1970-08-01), Ortlieb
patent: 3970456 (1976-07-01), Branton
patent: 4112562 (1978-09-01), D'Amato

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