Cathode-ray tube screen border improvement

Details Cathode-ray tube screen border improvement Cathode-ray tube screen border improvement

1979-06-11

1981-11-10

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907, H01J 2918

Patent

active

043000703

ABSTRACT:
The present invention provides an improved cathode-ray tube of a type having a cathodoluminescent line screen and slit apertured mask mounted within the tube in spaced relation to the screen, wherein the slits in the mask are aligned in substantially parallel columns, each column containing a plurality of slits which are vertically separated by web portions of the mask. In the tube, some of the end portions of the aperture columns are modified to produce a more asthetically pleasing screen border.

REFERENCES:
patent: 3766419 (1973-10-01), Barbin
patent: 3856525 (1974-12-01), Inoue
patent: 3947718 (1976-03-01), Van Lent
European Patent Application No. 0 001 673, Date of Publication of Application 5-1979, 1 Sht. Drawing, 4 pages specification.

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