Luminescent screen of a color television tube

Details Luminescent screen of a color television tube Luminescent screen of a color television tube

1972-08-11

1976-10-12

Husack, Ralph

Electric lamp and discharge devices

Cathode ray tube

Envelope

427 68, 427105, H01J 3112, H01J 2918

Patent

active

039860736

ABSTRACT:
A method of manufacturing a luminescent screen of a shadow mask color tube. The phosphor dots on the screen which are separated by a light-absorbing material are smaller than the apertures in the shadow mask. The light-absorbing layer is first provided on the window and the luminescent materials are then provided successively. The inner surface of the window is such that undulations having a spatial frequency from 5 to 50 cm.sup.-.sup.1 or, in other words, wavelengths between 0.2 cm and 0.02 cm, show a depth of less than 1 micron.

REFERENCES:
patent: 3569761 (1971-05-01), Lange
patent: 3615460 (1971-10-01), Lange
patent: 3632339 (1972-01-01), Khan
patent: 3661581 (1972-05-01), Feldstein
patent: 3677757 (1972-07-01), Nishizawa
patent: 3681111 (1972-08-01), Kaplan
patent: 3695871 (1972-10-01), Lange
patent: 3708336 (1973-01-01), Nishizawa et al.
patent: 3734728 (1973-05-01), Kachel

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