Which can tell me about the development of black and white TV sets in China

March 18, 1958: China's first black-and-white television set was born.

The trial production team of Tianjin Radio Factory (712 Factory) successfully trial-produced China's first black-and-white TV with reference to the 14-inch tube TV set under the flag of the Soviet Union. In commemoration of the birth of this television set, it was named "Beijing" and is now displayed in the product showroom of Tianjin Communications and Broadcasting Company.

China's first television set Half a year later, China's first television station, Beijing TV, was officially launched. At that time, Beijing TV was the predecessor of the current ** TV station, and there were only about 20 black and white TV sets in the country at that time. In 1958, when China's television industry was in its infancy, black-and-white television programs were broadcast four times a week for only two to three hours.

In 2008, it celebrated its 50th birthday.

I got it in 1958. In the early days, televisions could only display black and white colors, and later in the process of technological development, more technological levels were developed, and color televisions began to be replaced by color televisions in the late 80s.

The first black-and-white television set appeared in 1958. After the birth of the TV set around me, it went through more than ten years of development, and then in the late 80s, color TV sets appeared.

In 1958, China's first black-and-white TV was born, and at the beginning of the 21st century, the TV coverage rate in Chinese mainland reached 94%; After a long period of development, it has been perfected and improved step by step.

March 17, 1958 is a memorable day in the history of China's television development. That evening, China's Television and Broadcasting Center conducted its first trial television program in Beijing, and China's first television receiver developed by the state-owned Tianjin Radio Factory (later renamed the Tianjin Communications and Broadcasting Company) was successfully tested in the field.

This Beijing brand 820 type 35cm tube black and white TV, which is known as "the first screen in China", is now placed in the product showroom of Tianjin Communication and Broadcasting Company. Before 1958, there was no television broadcasting in China, and television sets could not be produced in China. In April 1957, the 10th Bureau of the Second Ministry of Machinery Industry handed over the task of developing a television receiver to the state-owned Tianjin Radio Factory.

At that time, most of the members of the trial production team were only about 20 years old, they were extremely unfamiliar with the new technology of television, which integrated electricity, magnetism, sound and light, and had never seen a television set, and there were few reference materials.

The successful trial production of China's first television set has filled the gap in China's television production and is the starting point of China's television production history.

China's first television set was successfully trial-produced by Tianjin Radio Factory in March 1958. In honor of the birth of this television set, it was named "Beijing".

China's first TV, a small black and white screen, opened the TV era of thousands of empty alleys!

China's first black-and-white television set was born in 1958. In the boom of the Great Leap Forward, part of the heart of the domestic electron tube of Tianjin 712 Factory, the components of the Soviet Union at that time produced a Beijing brand 14-inch black-and-white TV. At that time, China's television development technology was basically at the same starting line as Japan's.

In 1925, the Englishman John. Rocky. Baird, based on the "Nipkov Disc" designed by the German engineer Nipkov, carried out new research work and succeeded in inventing the world's first television set, which was a mechanically scanning television camera and receiver.

At that time, the resolution of the image was only 30 lines, the scanner could only sweep the scanning area five times per second, and the image itself was only 2 inches high and one inch wide. A performance was given to the public at a large store in London. In 1926, Baird, one of the inventors of television, gave a show to the British press about the broadcast and reception of television.

From 1927 to 1929, Baird conducted the first electromechanical television trial broadcast through ** cable; The first shortwave TV trial; The BBC began broadcasting television programs for a long time. In 1930, television images and sound were broadcast simultaneously. In 1931, the film was put on the television screen for the first time.

In London, people watched the live broadcast of the famous local Jockey Club in the United Kingdom. One of the inventors of television, American Ferro Farnsworth, invented a tube television device that could reflect 25 images per second.

The development of science and technology, in the 50s of the 20th century, gradually appeared color television. Television can show all aspects of social life in a timely and accurate way through screen images and accompanying sounds, which is very entertaining, and is a mass media and sunrise industry. In order to install, weld, debug and other operations of the TV, you should first master the common sense of electricity safety, the use of common electronic components and electronic instruments, and also understand the basic working principle of the black and white TV, as well as the functions that can be achieved by each part of the circuit.

black-and-white televisions; The use of electronic technology and equipment to transmit the image picture and audio signal of the event, that is, the television receiver, is also an important broadcasting and communication tool, the method of television electricity to transmit the visual image of the event in real time. Similar to movies, TV uses the visual residual effect of the human eye to show a still image with a gradual change of frames, forming a visual living image. The transmitter of the TV system converts the various fine parts of the scene into electrical signals according to brightness and chromaticity, and transmits them sequentially.

At the receiving end, the luminance and chromaticity of each fine part are displayed according to the corresponding geometric position to reproduce the whole original image, and the scanning system of the TV signal in various countries is not exactly the same as the channel bandwidth, and the Latin alphabet is used to distinguish it according to the recommendation of the International Radio Advisory Committee (CCIR).