Who invented black & white, & colour tv & in which year?
Paul Nipkow of Germany described a television system using a mechanical disc scanner in 1883, One version showed a color system which used three rows of scanning holes on a single disc. It appears that Nipkow never implemented his invention (even though he patented it). Practical mechanically scanned systems were developed by Baird who demonstrated a system based on the Nipkow disc in 1923. The first electonic TV system was based on the iconoscope camera tube invented by V Zworkin in 1929. It was used for television broadcasts that started in 1939, introduced at the New York World’s Fair. It was replaced by the image orthicon in the 1960s, a tube that was based on the image dissector invented by Farnsworth in 1930. All electronic television display devices used cathode ray tubes developed from the “Crookes Tube” in 1922. The first practical color television system was developed by CBS labs and broadcast three primary colors as a sequence of full pictures (field sequential). The initial
