Who invented black & white, & colour tv & in which year?

Answer 1

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 systems used spinning color wheels to color the picture, but later versions were demonstrated with color CRTs. This system was first shown publicly in the early 1950s. Because the field rate of standard television was not fast enough to avoid color flicker, this system had to use a higher field rate, and therefore existing TV sets could not receive the signal.

A rival system was developed by RCA Sarnoff Labs, which was called "simultaneous" since the picture was divided into black and white component ("luminance") and color component ("chrominance') The luminance was transmitted normally, but the color component was "squeezed" into the picture on a separate signal. Because the luminance was just like existing TV, this system ws compatible with existing TV sets, and this was a major selling point when it formed the basis of the NTSC system later adopted as the US standard for color television adopted in 1953.

Answer 2

television was not invented by a single inventor,instead many people working together and alone contributed to the evolution of a TV between 1831 and 1950, for instance American Charles Jenkins and Scotsman john Baird followed the mechanical model while philo farnsworth working independently in San Francisco and Russian e'migre' Vladimir Zworykin working for Westinghouse, and later RCA advanced the electronic model.also visit http://inventors.about.com/library/inventors/bl_television_timeline.htm and read about history of television time line.

Answer 3

rca victor company 1955