The experimentation of cathode rays is largely accredited to J.J. Thomson, an Englishphysicist who, in his three famous experiments, was able to deflect cathode rays, a fundamental function of the modern CRT. The earliest version of the CRT was invented by the German physicist Ferdinand Braun in 1897 and is also known as the Braun tube.[1] It was acold-cathode diode, a modification of the Crookes tube with a phosphor-coated screen.
In 1907, Russian scientist Boris Rosing used a CRT in the receiving end of an experimentalvideo signal to form a picture. He managed to display simple geometric shapes onto the screen, which marked the first time that CRT technology was used for what is now known astelevision.[2]
The first cathode ray tube to use a hot cathode was developed by John B. Johnson (who gave his name to the term Johnson noise) and Harry Weiner Weinhart of Western Electric, and became a commercial product in 1922.
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