TV has long become a familiar attribute of modern life. The possibilities of television are constantly expanding, and the abundance of channels is able to satisfy the needs of even the most demanding viewer. It is hard to imagine that just a few decades ago, TV was considered exotic, not available to everyone.
The impetus for the implementation of the idea of television broadcasting was the invention of radio. Russian inventor A. Popov, Italian Marconi, American scientist Tesla are related to the appearance of the first radio receiver. Each of them contributed to the development of the theory of radio wave propagation. At the turn of the 19th and 20th centuries, a fairly stable radio communication was obtained. The basis for the emergence of television was created.
The principle underlying television broadcasting was discovered in the 1880s by the French LeBlanc and the American Sawyer. The idea was to scan the elements of the image very quickly in sequence. Image processing had to be carried out line by line in frame-by-frame mode. Such a process would make it possible to reproduce the image of simple figures with a sufficiently high definition.
In 1884, the German Nipkov developed and patented a more reliable method for scanning an image. But the most significant advances in nascent television were not made until two decades later. A picture tube was designed and a method for amplifying the signal was developed. At the beginning of the last century, the theoretical basis of television began to form, in the focus of which was the principle of scanning an image by means of an electron beam.
In the early 1920s, an engineer from Scotland, John Byrd, began designing equipment for transmitting and receiving a television signal. It took the researcher more than three years to obtain recognizable images of human faces. It was even more difficult to learn how to transmit moving pictures over a distance using radio waves. Baird, who was persistently moving towards his goal, achieved this effect by 1926.
With the emergence of systems transmitting a television signal, the invention of the television became possible. The same Byrd, inspired by his successful experiences, by the beginning of the thirties of the last century founded his own company, which became the first and only manufacturer of television receivers in its time. Subsequently, Byrd made an invaluable contribution to the development of color television.
In 1929, regular television broadcasts began in Germany and Great Britain. And in 1931, Vladimir Zvorykin, a native of Russia who emigrated to the United States, created a television system based on a cathode-ray tube. This invention made it possible to produce television receivers of high quality and simple design.
Modern TVs are very different from their predecessors, which had a small screen and modest performance. But today's multifunctional and powerful television systems owe their appearance to the painstaking work of many inventors, engineers and designers of the last century.