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Philo Taylor Farnsworth (August 19, 1906 – March 11, 1971) was an American inventor and television pioneer. [2] [3] He made the critical contributions to electronic television that made possible all the video in the world today. [4]
[11] [12] By September 3, 1928, Farnsworth had developed the system sufficiently to hold a demonstration for the press, [12] the first such successful demonstration of a fully electronic television system. [12] In 1929 Farnsworth eliminated a motor generator from the system, so it then had no mechanical parts. Further developments that year ...
A patent for a television system was also filed by Zworykin in 1923, but this file is not a reliable bibliographic source because extensive revisions were done before a patent was issued fifteen years later [21] and the file itself was divided into two patents in 1931. [1] [22] Iconoscope and mosaic from a TV camera, circa 1955.
In 1929, Farnsworth's system was further improved by the elimination of a motor generator. Consequently, his television system had no mechanical parts. [8] During the same year, Farnsworth transmitted the first live human images with his system, including a 3.5 in (89 mm) image of his wife Elma ("Pem") with her eyes closed (possibly due to the ...
In January 1927, American inventor and television pioneer Philo T. Farnsworth applied for a patent for his Television System that included a device for "the conversion and dissecting of light". [20] Its first moving image was successfully transmitted on September 7 of 1927, [24] and a patent was issued in 1930. [20]
His demonstrations continued for ten days afterwards. Farnsworth's system included his version of an image dissector. [1] [2] November 5 - First television broadcasts in the USSR. Late 1934 - Vladimir K. Zworykin increases the number of scanning lines in electronic television from 240 lines at 24 frames per second to 343 lines at 30 frames.
August 25 - On August 25, the inventor Philo Farnsworth gave the world's first public demonstration of an all-electronic television system, using a live camera, at the Franklin Institute of Philadelphia. His demonstrations continued for ten days afterwards. Farnsworth's system included his version of an image dissector. [5] [6]
Television tubes developed by Farnsworth and Zworykin in the United States, and by EMI in England, with much higher sensitivity to light, made the intermediate film system obsolete by 1937. Film continued to be used for time-shifting and as a long-term storage until electronic video recorders were invented.