Trinitron was Sony`s brand name for its line of aperture grille based CRTs used in television sets and computer display monitors. One of the first truly new television systems to enter the market since the 1950s, the Trinitron was announced in 1968 to wide acclaim for its bright images, about 25% brighter than common shadow mask televisions of th....
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http://en.wikipedia.org/wiki/Trinitron
(from the article `television`) ...and (3) precisely congruent scanning patterns, as among the three beams, must be produced. In the late 1960s a different type of mask, the ...
Found on
http://www.britannica.com/eb/a-z/t/80
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