A New High-Efficiency Parallax Mask Color Tube
- 1 January 1955
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 43 (8) , 936-943
- https://doi.org/10.1109/JRPROC.1955.278200
Abstract
The electron transmission through the parallax masks of present-day tricolor tubes is about 12 per cent, thus placing a limit on picture brightness. This paper describes a new tube employing a parallax mask maintained at a potential much lower than that of the screen and a collector mesh maintained at anode potential intermediate to the screen and mask potentials; the brightness of the tube is increased 3-4 fold by virtue of enlarged mesh holes and the ensuing post-deflection focusing. In addition, secondary emission from the mask, which would dilute color, is minimized. In contrast to other post-accelerating tubes, the mask holes and fluorescent screen dots are uniformly spaced over the entire target area. Nineteen-inch round and twenty-four-inch rectangular tubes incorporating the new principle have been built.Keywords
This publication has 3 references indexed in Scilit:
- Development of the rca 21-inch metal-envelope color kinescopeElectrical Engineering, 1955
- The PDF Chromatron-A Single or Multi-Gun Tri-Color Cathode-Ray TubeProceedings of the IRE, 1953
- Theory of Parallax BarriersJournal of the Society of Motion Picture and Television Engineers, 1952