Color picture tube shadow mask

Details Color picture tube shadow mask Color picture tube shadow mask

1980-08-18

1983-01-25

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907, H01J 2980

Patent

active

043705910

ABSTRACT:
In a color picture tube especially incorporating an in-line dot type shadow mask, the horizontal arrangement of the apertures of the shadow mask is determined to make substantially equal the interdistance between adjacent electron beams formed on the fluorescent screen based on beams of electron passing through apertures at the corners of the shadow mask, thereby making full use of the purity tolerance.

REFERENCES:
patent: Re27259 (1971-12-01), Rublack
patent: 3486061 (1969-12-01), Barten
patent: 3590303 (1971-06-01), Coleclough
patent: 3705322 (1972-12-01), Naruse et al.

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