The first person who was interested in the development of television was an Italian-born priest named Cassel. He is famous in France because he invented the method of transmitting images by telegraph wire. But his invention of television was only the beginning. He can only transmit handwritten letters and pictures through telegraph lines, and other information on telegraph lines will interfere with his images, which often makes the transmitted images become scattered points and short lines.
1908, an Englishman named Bidwell wrote a letter to Nature, talking about his own TV equipment. This letter aroused great interest of Scottish-born electrical engineer Campbell Swindon. He began to look for a way to transmit all information through one line. 19 1 1 year obtained the basic patent of TV series. But when Campbell Swindon was alive, he didn't invent the corresponding TV device.
Almost at the same time as Campbell swinton, Professor Pohris Rosen of Petrograd Institute of Technology made his own TV set in 1907. He used a machine similar to the mechanical launcher developed by Germany a few years ago as the launcher. The receiver is a cathode ray oscilloscope. This device can barely see the image on the screen of the picture tube, which is very unclear. But his experiment strongly attracted one of his students, Vladimir Zvolikin, the TV inventor recorded in the encyclopedia now. He and his teacher reached the same conclusion about the best way to get TV signals, but he avoided the mistakes in the generator. 1923 obtained the patent of TV camera tube by using the storage principle. 1928 Zwolikin's new TV camera has been successfully developed.
At the same time, a high school student in Utah, USA, who was only 15 years old, put forward the concept of electronic TV to his teacher in19,21year. However, it took farnsworth six years to build an image analyzer that can transmit electronic images. Although farnsworth's image analyzer and Zorkin's photoelectric camera tube are different in design, they are very similar in concept, which leads to a patent dispute. According to ABC, Zorkin applied for a patent for his invention before farnsworth in 1923, but he couldn't produce a practical evidence. And farnsworth's teacher took farnsworth's image analyzer design to testify for Ferrara Favis. After years of unremitting efforts and setbacks, Fasvis finally succeeded. In the next 30 years, China Patent Office recognized him as the owner of all major power patents. 1957, in front of 40 million TV viewers, he announced: "I invented TV at the age of 14." 197 1 year, New Times called him one of the greatest and most attractive scientists in the world.
Later, although farnsworth continued to study TV technology, due to poor health, the research scope became narrower and narrower, and no greater achievements were made. American radio company began mass production of TV sets and made huge profits. They elected Zorkin and david sarnoff, then president of ABC, as the "fathers of television".