2. 1908, swinton of Britain and Roshenkov of Russia put forward the principle of electronic scanning, which laid the theoretical foundation of TV technology.
3. 1923, Zvalikin, one of the inventors of television, invented the electrostatic storage camera tube. 1923 invented the electronic scanning picture tube, which was the pioneer of television photography.
1926 Baird, one of the inventors of television, gave a performance of broadcasting and receiving television to the British press.
5. From1927 to 1929, Baird made the pilot broadcast of electromechanical TV through telephone cable for the first time; The first short-wave TV experiment; The BBC began to broadcast TV programs continuously for a long time.
6. 1930 can play TV images and sounds at the same time.
7. 193 1 year, the film was first put on the TV screen. I watched the live broadcast of the famous local jockey club in England on TV in London. Philo farnsworth, an American, one of the inventors of television, invented an electronic tube television device, which can reflect 25 images per second.
8. 1939, American radio company began to broadcast all-electronic TV. Swiss Philip invented the first black-and-white TV projector.
9. 1940, Gullmar developed an electromechanical color TV system.
10 and 1954, Texas instruments developed the first all-transistor TV receiver.
1 1, 1972 Japan has developed a color TV projector. 1973 digital technology is used in TV broadcasting, and the experiment proves that digital TV can be used in satellite communication. 1979 the world's first "cable TV" was opened in London. It was invented by the British Post Office. It can transmit the information in the computer through the ordinary telephone line and display it on the user's TV screen.
12 years, 198 1 year, Sony Corporation of Japan developed a pocket-sized black-and-white TV with a 2.5-inch LCD screen and battery power supply. 1984, Panasonic Corporation of Japan launched "Cosmic TV". The picture of the system is 3.6 meters wide and 4.62 meters high, which is equivalent to 2 10 inch. It can be put in a van and played in small streets, squares and other places. Even in the daytime, you can get colorful and bright images outdoors.
At 13 and 1985, BT launched an integrated digital communication network. It provides users with voice, fast chart transmission, fax, slow scan television terminal and so on.
Extended data:
The main parts of a TV set
Whether it is a color TV or a black-and-white TV, its chassis generally consists of three parts: front panel (front frame), middle frame and back cover. In daily maintenance work, it is not necessary to remove the front panel and the middle frame, but only the back cover can be removed for general maintenance operation, so the front panel and the middle frame of some TV sets are made into a whole.
When the back cover is removed, you can see the main components in the TV set, which can be divided into three parts: the back cover of the chassis, the front panel, the middle frame and the picture tube, the main printed board (movement) and various components.
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