History of the television

Today our life cannot be presented without TV. With development of technical equipment TVs change also, getting more and more difficult form. However, what you know about the history of the TV?

TV Record Release of 1956.

As is known, the TV is the youngest among mass media. In our country to its occurrence it was executed all a floor of a century. In the middle of XIX century attempts of transfer of the image from one point in another have been carried out. English mechanic A.Benua in 1843 has invented the device for transfer of the image as figure. A.Benua has represented figure on a piece of Zinc thin as a paper, has made an inscription with the help special Ink , then the piece Zink has established on the device for distribution of the image. On the device for acceptance of the image has established a special paper which changes under influence of an electric current.

Also there are data that in 1858 in official circles of Russia the project of one more equipment which with the help of an electric current transfers the image to distance was discussed.

In 1897 the important invention has been made. German scientific physicist K.F.Braun has invented the electronic tube distributing beams for oscillograph. Only after that the professor of the Petersburg institute of technology Boris Lvovich Rozing managed to accept the television image, and to transfer it from one place to another. In 1907 B.Rozing has suggested to use the electronic tube distributing beams, for transfer of the image on distance. On May, 22 (9), 1911 Rozing has tested on experience process of reception of the image of two black lines parallel each other on a light background by means of the electronic tube distributing beams.

The TV KVN 4а - Release of 1948. (View #1)

In the house of Yusufkhon aka and Gamza opa Mirzamukhamedov , living in Tashkent , area Shaykhantoxur, Bola masjid street, the house- 74 (nowadays Navoi street., the house -199, near the Tashkent television centre) there was a historical event. Here in 1925-1928 the modern TV based on full electric system since transfer of the image and finishing its reception has been created. Founders of this invention were Boris Grabovsky and Ivan Beljansky.

On August, 4, 1928 the device transmitting the television image, is established in the street. In a part of the TV system established before a cinema "Khiva" accepting the image, there is a moving tram. It - for the first time in the world the direct TV reporting in the street - became the big victory of the Tashkent inventors.

That represents the TV. This radio-electronic adaptation designed for reception, amplification and transformation in the image and a sound of electric signals of the telecasts transmitted from television studios. The TV happens colour and black-and-white, stationary or mobile. The accepting aerial receives the electric signals distributed from the television centre, and transfers them through a cable to the TV. In this process of fluctuation amplify, picture signals and a sound are divided, then they pass in a kinescope and a radio transmitter.

With the help of generators on the screen of a kinescope there is a television raster. On the black-and-white TV all signals the image appears in a black and light element. Looking at quantity of accepting programs, TVs are 1, 3, 5, 12, 31 channel. On the TV it is used for reception of TV channels working on a range on meter wave. For reception of programs on decimetre a range are established special converters. This converter accepting decimetre signals corrects frequencies from one frequency on the second, and on other TV channels. Structure of TVs it is standardized. Idle time the circuit includes them in itself from different blocks: the hashed connecting block, the block the image and the sound channels, the widespread block and the block supplying with an electric current. Television studios can transfer at once several programs simultaneously. For what go on the necessary program we can to use the used block of adjustment on the TV. This block of adjustment is connected by high-frequency amplifiers. Signals the image and a sound are transferred on different frequencies and when these vibrations they amplify are transferred on different channels. Vibration of a sound signal gets on the block of a sound. On the block the image the detector divides a signal the image from high-frequency vibrations. Structure of colour TVs much more difficultly also differ from black-and-white channels with colour the block and colour a kinescope. Structure of colour TVs are 3 channels. Monochromic will consist of red, green, blue colours and all these colours mix up on the converter of colours then passes to transmitting modulator. Vibrations passes to the receiver and are anew divided on 3 frequencies of channels only after that passes to a kinescope. Usually TVs are divided on 4 types on different parameters, parameters quality, and the size of the screen and on parameters use.

I-III a class - these stationary TVs, IV class - portable, passing TVs: usually TVs will consist of constructive blocks which frequently were used on printed installation. On TVs semiconductors, integrated payments and transistors are used usually. Are created different screen TVs - the flat screen, the screen working on elektroluminifore, the big and small screens.