Screen border improvement for cathode-ray tube with slit...

Details Screen border improvement for cathode-ray tube with slit... Screen border improvement for cathode-ray tube with slit...

H - Electricity

01

J

313/35.16

H01J 29/07 (2006.01)

Patent

CA 1147009

RCA 73,423/73,423A 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. Some of the end portions of the aperture columns are modified to ensure a more aesthetically-pleasing screen border. In particular, webs whose centers would fall within about one-half of the web repeat distance from either of the ends of the columns if the web repeat distance was maintained are omitted such that the ends of all the columns are aligned along smoothly contoured borderlines.

340318

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