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About: Geer tube     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:VisualCommunication106873252, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: anatomical structureyago:WikicatVacuumTubeDisplaysyago:Abstraction100002137yago:Communication100033020yago:Demonstration106879180yago:Display106879521yago:VisualCommunication106873252 New Facet based on Instances of this Class

The Geer tube was an early single-tube color television cathode ray tube, developed by Willard Geer. The Geer tube used a pattern of small phosphor-covered three-sided pyramids on the inside of the CRT faceplate to mix separate red, green and blue signals from three electron guns. The Geer tube had a number of disadvantages, and was never used commercially due to the much better images generated by RCA's shadow mask system. Nevertheless, Geer's patent was awarded first, and RCA purchased an option on it in case their own developments didn't pan out.