Monochrome cathode ray tube for use as a color reference

Details Monochrome cathode ray tube for use as a color reference Monochrome cathode ray tube for use as a color reference

1985-04-03

1986-08-19

Levy, Stewart J.

Electric lamp and discharge devices

Cathode ray tube

Screen

313470, 358 10, H01J 2932, H01J 3120

Patent

active

046071881

ABSTRACT:
By adjusting the exposure dosages for the three primary color phosphors in the photolithographic process used to produce color CRTs for color television, standard whites of desired color temperatures are obtained. The aperture mask used in the photolithographic process is then discarded, and the CRT is operated as a monochrome tube in a standard receiver. Stable, rugged and portable color references are thus produced.

REFERENCES:
patent: 2337980 (1943-12-01), DuMont et al.
patent: 3928785 (1975-12-01), Standaart
patent: 4406971 (1983-09-01), Takano et al.

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