When was the TV set invented? Help the gods.

The development of TV 19 At the end of this year, a few pioneers began to study the technology of designing and transmitting images. 1880, the world's first mechanical television, Leiblang, a Frenchman, proposed that a mirror vibrates on two different axes at different speeds to form a linear scanning back and forth, thus decomposing and reproducing images. 1883, the German Pukov proposed the disk scanning method. 1897, Braun, Germany invented the cathode ray tube, which displays rapidly changing electrical signals; 1904, an Englishman, belleville, and a German, Kelon, invented a TV fax technology. Each photo needs 10 minute to fax one photo at a time. 1923, Russian-American scientist Zworykin applied for the patent of photoelectric picture tube, TV transmitter and TV receiver. He adopted a comprehensive "electronic TV" transmitting and receiving system for the first time and became a pioneer of modern TV technology. With the application of electronic technology in TV, TV began to go out of the laboratory and enter the public life. From 65438 to 0924, British and German scientists successfully transmitted still images by mechanical scanning almost at the same time. However, the transmission distance and range of cable mechanical TV are very limited, and the image is quite rough. Picture In TV 1925, Baird of Scotland publicly demonstrated a machine he made, which successfully transmitted human facial activities with a resolution of 30 lines and a repetition rate of 5 frames per second. Since then, television has begun its magical development. 1928, 3 1 radio stations in new york, USA conducted the first television broadcasting experiment in the world. Because CRT technology has not completely passed the test, the whole experiment only lasted for 30 minutes, and only a dozen TV sets were watched. This announced the emergence of TV art as a social undertaking and an epoch-making event in the history of TV development. On 1929, American scientist eves played 50 lines of color TV images between new york and Washington, D.C., and invented the color TV. 1933, Zworykin successfully developed camera tubes and picture tubes for TV camera shooting. The process of making TV camera and imaging completely electronic has been completed, and so far, the modern TV system has basically taken shape. Today, the imaging principle and equipment of TV cameras and TV receivers are improved according to his invention. 1935, Baird established the first TV station in cooperation with a German company, broadcasting programs three times a week. 1936; Britain broadcast the clearest public television program in the world at that time; 1939, the United States broadcasts fixed TV programs. Since then, people's lives have had a profound and complicated connection with television. 1938, the German Fletcher Siegel put forward the idea of three guns and three beams color kinescope. 1949, the United States first developed the world's first three-gun three-beam color picture tube; 1957, an all-glass color picture tube was developed. 1964, a rectangular picture tube with full glass shell was developed; 1969 A kinescope with black background was developed, and the brightness was doubled. 1968, Sony Corporation of Japan developed a three-color display tube with one gun; 1972, the United States successfully developed a color display tube with automatic convergence error correction. At this point, the development of color TV has entered a mature stage. With the rapid development of modern science and technology, the development trend of modern TV technology will have the following ten characteristics: 1. Polarization. The first is miniaturization. The microcomputer screen size of LCD is 3.8 cm to 3.9 cm, and the microcomputer screen size developed by cathode ray tube is below 14 cm. The second is large-scale. Such as wall-mounted thin flat panel TV, cathode ray imaging big screen TV, projection big screen TV, etc. 2. Decoration. With its exquisite modeling and decoration, TV will become a beautiful decoration in room layout, which can replace murals or mirror cabinets. 3. Digitization. Television sets that convert analog signals into discrete digital signals with digital integrated circuits have emerged. 4. Serialization. It is a technical means to strengthen quality management, improve labor productivity, ensure product quality and facilitate after-sales service in design work. 5. high definition. The 625 scanning line of the original TV screen will be increased to 1250, and the picture quality can be improved by 100%. 6. Stereophonization. The TV set has two-channel sound effects, and the sound quality can be comparable to that of CD. 7. Multi-channel. You can receive more than 10 or even hundreds of TV programs. 8. Satellization. Television programs transmitted by several, dozens or even global satellites can be received through the antenna of outdoor special devices. 9. Sunshine vision. After improving the color filter and display screen, the TV can still receive very bright TV images even in the daytime or under the sun. 10. New materials. The materials of all components in TV sets will be updated, and new alternative materials with lower application cost and better performance will be developed. From 1930 to 1940, television was formed. Besides the great improvement of broadcasting engineering technology, television has gradually become a mass media. However, due to the outbreak of World War II, the research and development of television in various countries was greatly affected and almost interrupted. It was not until the end of World War II that the television industry began to flourish in the United States and other countries. 1940, the electromechanical color TV system was developed in Gullmar, USA. 1949 17 February 17, the first TV cable between London, England and Sudenkolfeld was opened. 195 1 year, American H. Lowe invented the three-gun shadow mask color picture tube, and Lawrence invented the single-gun color picture tube.