TV: from past to future

Shop.az 2017-11-03 16:57:54
TV: from past to future

On December 17, 1996, the UN General Assembly proclaimed 21 November as World Television Day.

Currently, there is no country in the world not covered by TV broadcasting. Television is the most influential electronic medium in the mass media.

About the transfer of images to the distance of mankind has dreamed of a long time, as evidenced by fairy tales and legends about magic mirrors, plates with apples, but not one millennium passed before this dream came true.

Today the TV has become an integral part of the life of modern man. Most TV viewers spend whole evenings watching their favorite films and programs, serials and programs, news releases and sports championships. Now it is difficult to imagine an apartment in which there would be no TV. But a few decades ago this device was considered a luxury. So, how and when was the very first TV in the world created? Below we will tell you a brief history of the creation of television.

German scientist Paul Nipkov in 1884 created the Nipkov disk, which was then used by many creators of the first devices that transmit the image.

In 1907, Boris L. Rozing proved the possibility of converting an electrical signal into image points using a cathode ray tube. In 1911 he presented the transfer of television images of geometric shapes, and after receiving these figures with a demonstration on the display.

In 1925, John Logie Baird achieved the appearance of an image of a human head on the screen of his device. Although the image was fuzzy and flickering, this event was the first impetus in the development of television. In his experiment, the inventor used a cardboard disc, a cake tin, a bicycle lantern and an empty box.

In 1927, Ernst Alexanderson broadcasted live a man smoking a pipe. After a few months, similar "programs" could be watched a couple of times a week.

In the same year in the US went on sale the very first TV. Its cost was only $ 75, approximately 2 monthly salaries of the average worker at that time.

And 10 years later in England, the very first TV with a cathode-ray tube was created, over time, such TVs began to go on sale in the US.

At the end of 1936, the first electronic TV, suitable for practical use, was developed at the American RCA research laboratory headed by Zvorykin. Somewhat later, in 1939, RCA introduced the first TV, designed specifically for mass production. This model was called RCS TT-5. It was a massive wooden box, equipped with a screen with a diagonal of 5 inches.

 

The first experimental television broadcast session in the USSR took place on April 29, 1931. Since October 1 of the same year, television programs have become regular. Since there were no TV sets yet, there were collective screenings, in specially designated places for this purpose.

Uniform standards (PAL and SECAM) appeared and began to be introduced in 1967.

The first regular television programs began in 1936 in the UK and Germany, in 1941 in the United States. However, the mass distribution of television in Europe was received only in the 1950s, in most developing countries, its own state and private television companies emerged even later, in the 1960s and early 1970s.

The first Soviet television, released by industry, was called B-2. This mechanical model appeared in April 1932.

The first electronic TV was created much later - in 1949. It was a legendary KVN 49. The TV was equipped with such a small screen that, for more or less comfortable viewing, a special lens was installed in front of it, which had to be filled with distilled water.

In the production process, various improvements (upgrades) were made to the TV, which was reflected by adding separate letters to the receiver's name. Most of the upgrades were associated with the addition and replacement of lamps, as the original scheme of the TV in pursuit of simplicity and cheapness was made too primitive. Externally, the modifications of the TV are indistinguishable. TV "KVN-49" was very popular with the population, and it rightfully could be called a "national TV".

About half of the TVs produced were repaired during the warranty period, so in the people the abbreviation "KVN", with reference to this TV, was deciphered as "Bought - Enabled - Does not work" or "Cranked - Twisted - Does not work" (translated from Russian).

Later radio tubes were replaced by semiconductors. The first TV based on semiconductors was developed in 1960 by Sony. Later, models appeared on the basis of microcircuits. Now there are systems where all the electronic stuffing of the TV is enclosed in one single chip.

Today the quality of broadcasting has significantly increased and became digital. TVs themselves have already ceased to be perceived as "boxes", for flat LCD and plasma models appeared. Dimensions of the screen stopped measuring a couple of dozen centimeters. Television has become the norm. By the beginning of the twenty-first century, the methods and principles of telecasting had changed significantly. There was cable and satellite TV.

Technology, serving to demonstrate the television product, is rapidly improving. Gradually, there is a mixture of technologies. Now TV shows can be viewed on the computer with a tuner, and the TV can be used as a computer monitor. And who knows, maybe in a few years the TV will be with each of us around the clock in the form of a clock or buckle on a belt.

The TV of pleasure with a screen of 5 inches turned into a device almost to the whole wall with a thickness of OLED-panel 2.57 mm for the 65-inch model. The TV is so thin that it merges with the wall.

 

These are the latest achievements of 2017 with the design of "image on the wall" (picture-on-wall).

 

Thus, TV sets from "boxes" turned into flat LCD and plasma TV models, which can easily be found in the shops of Baku and in the section "Technics and Electronics" of our site Shop.az.

 

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