Cathode ray tube display error measurement apparatus and method

Details Cathode ray tube display error measurement apparatus and method Cathode ray tube display error measurement apparatus and method

1978-11-13

1980-09-02

Tokar, Michael J.

Electricity: measuring and testing

Electric lamp or discharge device

Cathode-ray tube

356372, G01R 31024

Patent

active

042209196

ABSTRACT:
A color test pattern, such as a crosshatch line pattern, is generated on the phosphor screen of a color cathode ray tube or a color kinescope. A cathode ray tube display error measuring device comprising at least two optical plates, each transmissive to the light emitted by a different color phosphor of the color kinescope is placed adjacent the phosphor screen. One of the optical plates is rotated until the two images of the test pattern formed by the two plates move into alignment with each other. The amount of rotation is a measure of the amount of error present.

REFERENCES:
patent: 3326079 (1967-06-01), Dyson et al.
patent: 3582216 (1971-06-01), Edwards
patent: 3587289 (1971-06-01), Plummer
patent: 4035834 (1977-07-01), Drury

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