Screen for slotted aperture mask color television picture tube

Details Screen for slotted aperture mask color television picture tube Screen for slotted aperture mask color television picture tube

1975-07-11

1978-01-03

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313470, H01J 2928, H01J 2932, H01J 3120

Patent

active

040669246

ABSTRACT:
A black matrix screen for a slotted mask color television picture tube is printed using a shortened linear source of actinic radiation to result in deposition of black matrix material in the shadows of the mask webs appearing in the phosphor stripe area. Screen reflectivity is thereby reduced and contrast enhanced. By controlling vertical size of the black matrix material in the shadow cast by each respective web between vertically-adjacent slots, the tube may be made either positive or negative guardband in the vertical direction.

REFERENCES:
patent: 3146368 (1964-08-01), Fiore et al.
patent: 3247412 (1966-04-01), Barneveld et al.
patent: 3558310 (1971-01-01), Mayaud
patent: 3685994 (1972-08-01), Frey
patent: 3731129 (1973-05-01), Tsuneta et al.
patent: 3801817 (1974-04-01), Goodman
patent: 3900757 (1975-08-01), Kaplan
Toshiba, "Blackstripe Vertical Stripe Screen Colour Picture Tube", 1973.

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