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by iwnit on October 11th, 2009
"The history of television is both complex and far-reaching, involving the work of many inventors and engineers in several countries over many decades. Initially, work proceeded along two different but overlapping lines of development: those designs employing both mechanical and electronic principles, and those employing only electronic principles. Electromechanical television would eventually be abandoned in favor of all-electronic designs."
"Electromechanical television:
The origins of mechanical television can be traced back to the discovery of the photoconductivity of the element selenium by Willoughby Smith in 1873, the invention of a scanning disk by Paul Gottlieb Nipkow in 1884 and John Logie Baird's demonstration of televised moving images in 1926.
As 23-year-old German university student, Nipkow proposed and patented the first "near-practicable" electromechanical television system in 1884. Although he never built a working model of the system, Nipkow's spinning disk design became a common television image rasterizer used up to 1939.Constantin Perskyi had coined the word television in a paper read to the International Electricity Congress at the International World Fair in Paris on August 25, 1900. Perskyi's paper reviewed the existing electromechanical technologies, mentioning the work of Nipkow and others. The photoconductivity of selenium and Nipkow's scanning disk were first joined for practical use in the electronic transmission of still pictures and photographs, and by the first decade of the 20th century halftone photographs, composed of equally spaced dots of varying size, were being transmitted by facsimile over telegraph and telephone lines as a newspaper service.
However, it was not until 1907 that developments in amplification tube technology, by Lee DeForest and Arthur Korn among others, made the design practical. The first demonstration of the instantaneous transmission of still silhouette or duotone images was by Georges Rignoux and A. Fournier in Paris in 1909, using a rotating mirror-drum as the scanner and a matrix of 64 selenium cells as the receiver.
In 1911, Boris Rosing and his student Vladimir Kozmich Zworykin created a television system that used a mechanical mirror-drum scanner to transmit, in Zworykin's words, "very crude images" over wires to the electronic Braun tube (cathode ray tube or "CRT") in the receiver. Moving images were not possible because, in the scanner, "the sensitivity was not enough and the selenium cell was very laggy".
On March 25, 1925, Scottish inventor John Logie Baird gave the first public demonstration of televised silhouette and duotone images in motion, at Selfridge's Department Store in London. AT&T's Bell Telephone Laboratories transmitted halftone still images of transparencies in May 1925. On June 13 of that year, Charles Francis Jenkins transmitted the silhouette image of a toy windmill in motion, over a distance of five miles from a naval radio station in Maryland to his laboratory in Washington, using a lensed disk scanner with a 48-line resolution."
Source and further information:
http://en.wikipedia.org/wiki/History_of_television
by Gnome of Kevonia is a Cheerwine junkie on October 10th, 2009
John Logie Baird and Philo Farnsworth
by Teller of Truth on June 10th, 2009
I believe Christopher Columbus did but don't take that as fact, I could be way off base here...
by Brian I on January 11th, 2008
It wasn't laying about waiting to be found, it had to be invented, and it was invented by John Logie Baird - a Scot.
by Possum on January 11th, 2008
Juan Te Le'Vision?
by Shatzee coming back? on October 10th, 2009
your question makes no sense
by keithold is a prodigal bagger on June 10th, 2009
G'day Anonymous,
Thank you for your question.
John Logie Baird and C. Francis Jenkins made the first public demonstrations of television in 1925. Baird is more widely credited with developing television.
http://www.answers.com/television
Regards
by anywho is feeling pretty on June 10th, 2009
A Scottish man, John Logie Baird.
by chintu on July 25th, 2009
umang
by Pecks bad boy on July 25th, 2009
Actually if you are talking about the person who was able to make TV a usable format that is based on what we see today (pre digital) it would be Philo Farnsworth. So even if he didn't invent TV. He sure was the one to "discover" how to make it more usable. He was the first to make a working video tube camera.
http://en.wikipedia.org/wiki/Philo_Farnsworth
+4
by socrateswasfat on January 11th, 2008
the word is invented...but i dont know. discover is to find, make known; reveal; disclose. invent is to originate or create as a product of one's own ingenuity, experimentation, or contrivance.
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