The Evolution of Tv

Topics: Television, History of television, Cathode ray tube Pages: 7 (2224 words) Published: November 23, 2011
The Evolution of Television
Television is one of the most valuable contributions of the scientists in the last century. The world's first real television picture was produced by a Scottish inventor called John Logie Baird in 19251. It was nearly a hundred years to the first television appears, television has evolved a lot in appearances and functions. Darwin’s theory suggests that the variation among living organisms and the evolution of a species is caused by the theory of natural selection. As a non-living organism, the development of television is similar to the evolution of living species which obeying the Darwin’s theory of Evolution. This theory suggests that there are five characteristics in every biological life including reproductive potential, constancy of numbers, struggle for existence, individual difference and inheritance of traits. This essay is going to discuss the development of television in the past one hundred years and how it demonstrates the evolution theory of Darwin.

The Evolution process of Television
A historian Arnold Abramson said that “No one person invented television; most of the inventors were ahead of their time and technology; some were idle dreamers, others were practical men who could turn their ideas into machinery.” Many scientists and engineers contributed to the evolution of television theoretically or practically. The process will present in timeline below.

Pre 1900---In 1884, Paul Nipkow invented a rotating- disc technology using in the transmission of images over wires2. Before 1900, the focus of television development is mainly on the theory; most of them cannot turn into machine due to the restriction of technology. 1900--- The term “television’’ invented by Constantin Perskyi and the first "television" showed at 1900 Paris Exhibition2. 1906--- The first working mechanical television system is invented by Boris Rosing by combining the Paul Nipkow's rotating disks and the cathode ray tube invented by Lee de Forest4. 1907--- Campbell Swinton and Boris Rosing develop electronic scanning method simultaneously in the same year on their own. This method can transmit and reproduce images by cathode ray tube.

1925--- John Logie Baird used a mechanical system based on Paul Nipkow's rotating disks to transmit moving silhouette images 4 called “Stooky Bill’’5 (image on the right). 1926--- John Logie Baird applied patent for his “Phonovision” which is using the phonograph disc to record and reproduce the TV images on 78rpm. In the same year, he demonstrated his “Noctovision” which is using infrared rays and UV rays in light place to see the images in the dark2. 1926--- Kenjiro Takayanagi successfully reproduced and displayed the image send from distance place wirelessly2. 1927--- John Logie Baird applied patent for his new system of recording television signal by using magnetic disc2.And Philo Farnsworth applied for a patent on his electronic television system called the Image Dissector which can transmit electronic moving picture4. 1927--- In this year, there were many trials on long distance transmission on wireless or cable method by different scientists like Baird, AT&T’s Bell Labs etc2. 1928--- The first TV station is set up in New York called Station W2XBS to broadcast mechanical television. And Vladimir Zworykin received the patent for his all- electronic color television2. 1932--- A 120-line electronic TV system was demonstrated by RCA2. 1935--- An England company EMI successfully developed a full set electronic TV system with resolution of 405-line and 25 frames per second2. 1936--- The first public high- definition service with 405 lines started in London provided by BBC2. 1939--- TV was displayed at the New York World’s Fair and San Francisco Golden Gate International Exposition4. 1940--- Peter Goldmark announced the invention of color TV system with resolution of 343-lines4. Between the Second World War--- Only limited broadcasting...
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