Electric lamp and discharge devices: systems – Cathode ray tube circuits – With radiant energy sensitive control means
Patent
1981-09-11
1984-07-10
Smith, Alfred E.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
With radiant energy sensitive control means
313468, 346110R, 358 69, H01J 2920, H01J 2932
Patent
active
044595123
ABSTRACT:
A cathode-ray display tube for color printers has a phosphor screen comprises a blue-emitting phosphor having a maximum ability of color emission in the range of wavelengths of 480 m.mu. and below with a radiant energy in the range of wavelengths of about 480 m.mu. and higher being 10% or less of the overall radiant energy; a green-emitting phosphor having a maximum ability of color emission in the range of wavelengths of 520 through 570 m.mu. with a radiant energy in the range of wavelengths of about 500 m.mu. and less and of about 630 m.mu. and higher being 5% or less of the overall radiant energy; and a red-emitting phosphor having a maximum ability of color emission in the range of wavelengths of 630 through 750 m.mu. with a radiant energy in the range of wavelengths of about 590 m.mu. and less being about 10% or less of the overall radiant energy.
Phosphor dots located beyond the area of normal raster are sensed to provide timing signals for controlling beam deflection.
REFERENCES:
patent: 2733164 (1956-01-01), Smith
patent: 2862130 (1958-11-01), Sadowsky et al.
patent: 3308326 (1967-03-01), Kaplan
patent: 3723787 (1973-03-01), Blasse et al.
patent: 3767954 (1973-10-01), Van Den Avoort
patent: 4067650 (1978-01-01), Spence-Bate
Folkerts et al., "Photography of Cathode-Ray-Tube Traces", RCA Review, VI, (2), Oct. 1941, pp. 234-244.
Fields Carolyn E.
Smith Alfred E.
Yokogaw Hokushin Electric Corp.
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