Method of manufacturing a colour television display tube and tub

Details Method of manufacturing a colour television display tube and tub Method of manufacturing a colour television display tube and tub

1983-01-18

1985-01-29

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

430 24, 430 53, 430 55, 430942, 430 25, G03G 13048

Patent

active

044966415

ABSTRACT:
A method of making a colour display screen for a television display tube is disclosed. On the window portion of the tube an electron-absorbing layer is provided which is scanned by means of an electron beam via the shadow mask. The charge image on the layer is then developed xerographically. The layer is preferably photoconductive so as to be able to remove the charge remaining after the development by means of a uniform exposure.

REFERENCES:
patent: 2682478 (1954-06-01), Howse
patent: 3001849 (1961-09-01), Walkup
patent: 3067349 (1962-12-01), Kasperowicz et al.
patent: 3453639 (1969-07-01), Berman
patent: 3475169 (1969-10-01), Lange
patent: 3527652 (1970-09-01), Ozaki et al.
patent: 3708336 (1973-01-01), Nishizawa et al.
patent: 3986073 (1976-10-01), Duinker et al.

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