Device for measuring eccentricities of electron beams of a color

Details Device for measuring eccentricities of electron beams of a color Device for measuring eccentricities of electron beams of a color

1996-01-26

1998-04-21

Kostak, Victor R.

Television

Monitoring, testing, or measuring

Testing of image reproducer

348807, H04N 1700

Patent

active

057423385

ABSTRACT:
A device is provided for measuring eccentricities of electron beams of a color cathode ray tube. The device detects, in a magnetically neutral environment, by use of a luminance pattern formed on the screen of the tube, eccentricities of electron beams, ascribable to electron gun electrode port production and assembly errors. The device has rapid measuring capabilities and may be used on a production line.

REFERENCES:
patent: 4642529 (1987-02-01), Penn
patent: 4680510 (1987-07-01), Spieth et al.
patent: 4814858 (1989-03-01), Mochizuki et al.
patent: 5216504 (1993-06-01), Webb et al.

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