Shadow mask having a layer of high atomic number material on gun

Details Shadow mask having a layer of high atomic number material on gun Shadow mask having a layer of high atomic number material on gun

1980-05-29

1982-07-13

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313311, H01J 2907

Patent

active

043396879

ABSTRACT:
A cathode ray tube of the shadow mask type has a layer of high atomic number material fabricated upon the shadow mask surface nearest to at least one electron gun, to increase backscatter of electrons impinging upon the non-aperture areas of the shadow mask, thereby reducing local heating of the mask and maintaining color purity of the cathode ray tube even at increased brightness levels.

REFERENCES:
patent: 2663821 (1953-12-01), Law
patent: 3525679 (1970-08-01), Wilcox et al.
patent: 3885190 (1975-05-01), Taniguchi et al.

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