Color picture tube having improved slit type shadow mask

Details Color picture tube having improved slit type shadow mask Color picture tube having improved slit type shadow mask

1979-12-18

1981-10-06

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907, H01J 2918

Patent

active

042937922

ABSTRACT:
A color picture tube having a cathodoluminescent screen, electron gun and a slit type apertured mask located between the screen and gun, wherein the slits in such mask are arranged in columns and the slits in each column are separated by webs, has an improved web configuration. Alternate webs within a column are of lesser thickness than the general mask thickness with the geometric center of the alternate webs being offset toward the screen side of the mask.

REFERENCES:
patent: 3882347 (1975-05-01), Suzuki et al.
patent: 3883770 (1975-05-01), Yamada et al.
patent: 3916243 (1975-10-01), Brown
patent: 3944867 (1976-03-01), Kaplan
patent: 4048536 (1977-09-01), Brown

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