Shadow mask having elongated apertures concave to vertical cente

Details Shadow mask having elongated apertures concave to vertical cente Shadow mask having elongated apertures concave to vertical cente

1974-02-14

1976-03-30

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, H01J 2907, H01J 3120

Patent

active

039477185

ABSTRACT:
The display screen of a colour cathode ray tube comprises a line pattern of elongated phosphor regions. The elongate apertures in the shadow mask having the shape of an approximately spherical sector are arranged along curved lines which during the manufacture of the tube are aligned in one flat plane with the central axis of a linear light source located in the deflection region.

REFERENCES:
patent: 3652895 (1972-03-01), Tsuneta et al.
patent: 3731129 (1973-05-01), Tsuneta et al.
patent: 3777204 (1973-12-01), Robbins et al.
patent: 3889145 (1975-06-01), Suzuki et al.

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