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Kálmán Tihanyi (28 April 1897, Zbehy (Üzbég) - 26 February 1947, Budapest), was a Hungarian physicist, electrical engineer and inventor. One of the early pioneers of electronic television, he made significant contributions to the development of cathode ray tubes (CRTs), which were bought and further developed by the Radio Corporation of America (later RCA),〔United States Patent Office, Patent No. 2,133,123, Oct. 11, 1938.〕〔United States Patent Office, Patent No. 2,158,259, May 16, 1939.〕 and German companies Loewe and Fernseh AG. He invented and designed the world's first automatic pilotless aircraft in Great Britain. ==Career== Born in Üzbég, Kingdom of Hungary (since 1920 Zbehy, Slovakia), Tihanyi studied electrical engineering and physics in Pozsony (today Bratislava) and Budapest. Tihanyi called his fully electronic television system "Radioskop". His patent application contained 42 pages detailing its design and mass production. It is recorded in UNESCO's Memory of the World Programme. Though it bears certain similarities to earlier proposals employing a cathode ray tube (CRT) for both transmitter and receiver, Tihanyi's system represented a radical departure. Like the final, improved version Tihanyi would patent in 1928, it embodied an entirely new concept in design and operation, building upon a technology that would become known as the "storage principle". This technology involves the maintenance of photoemission from the light-sensitive layer of the detector tube between scans. By this means, accumulation of charges would take place and the "latent electric picture" would be stored. Tihanyi filed two separate patent applications in 1928 then extended patent protection beyond Germany,〔German appl. 424822/June 11, 1928〕〔German appl. 482422/July 3, 1928〕 filing in France,〔Fr. Pat. 676.546/June 10, 1928〕 the United Kingdom,〔Br. Pat 313,456/June 11, 1928〕〔Br. Pat 315,362/July 11, 1928〕 the United States, and elsewhere. In 1928, Tihanyi went to Berlin, where the development of mechanical television involving Nipkow disks had already been begun by the German Post Office and the larger manufacturers. The invention was received with enthusiasm by Telefunken and Siemens, but in the end they opted to continue with the development of mechanical television. From 1929, Tihanyi worked on television guidance for defense applications, building prototypes of a camera for remotely guided aircraft in London for the British Air Ministry, and later adapting it for the Italian Navy.〔〔http://www.ctie.monash.edu.au/hargrave/rpav_britain.html〕 In 1929, he invented the first infrared-sensitive (night vision) electronic television camera for anti-aircraft defense in Britain.〔http://www.hungarianhistory.com/lib/sipka.doc〕〔http://www.ctie.monash.edu.au/hargrave/tihanyi.html〕 Tihanyi's U.S. patents for his display and camera tubes, assigned to RCA, were issued in 1938 and 1939, respectively.〔〔 In 1936 Tihanyi described the principle of "plasma television" and conceived the first flat-panel television system.〔(Tihanyi, Katalin, "Kalman Tihanyi's plasma television, invented in the 1930s. Introduction to the article written by Julius Horvath." ) ''MTESZ SCITECH'', 2007-01-16, retrieved 2009-05-30.〕 It involved a single “transmission point” being moved at great speed behind a grid of cells arranged in a thin panel display, which would be excited to different levels by varying the voltages to the point〔http://ewh.ieee.org/r2/johnstown/downloads/20090217_IEEE_JST_Trivia_Answers.pdf〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kálmán Tihanyi」の詳細全文を読む スポンサード リンク
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