Who invented the television?

Inventor: In 1924, Baird, an Englishman, invented the most primitive television set, which transmitted images with electricity. The RCA launched the world's first black-and-white television in 1939, set the national standard for color television in 1953, and launched the RCA color television in 1954.

Because the RF signal is mixed with some interference signals in the process of air transmission and attenuated with the increase of transmission distance, after the TV receives the weak RF TV signal from the cable or antenna (RF IN), it must first be demodulated through the tuner, and after amplification, mixing and detection, the high-frequency carrier component is filtered out to obtain a composite all-TV signal of PAL, NTSC or SECAM standard. Separate the sound signal and the ** signal from the whole TV signal. The audio signal is processed by the audio circuit and then sent to the speaker output.

The signal is amplified, and the luminance and chromaticity signals are separated to obtain the YC component signal. Finally, the YC component signal is converted into YUV, and then converted into RGB component signal and sent to the CRT for display. In the whole TV signal, due to the bandwidth occupied by the chromaticity signal, the electronic circuit of the TV directly intercepts the signal at the low end of the brightness of about 3MHz when the brightness and chromaticity signal are separated and processed.

In this case, although the phosphor screen of the TV can achieve a horizontal decomposition rate of about 500 lines, the actual horizontal decomposition rate of the TV signal input from the antenna is only about 260 lines. In addition, the signal strength of different channels is different, and the final image resolution rate reflected on the phosphor screen is also different.

Baird One day in 1929, when the British first saw the television image, they were all elated and rushed to tell each other. Among them was Baird (1888-1946), the inventor of television, who shed tears of emotion. Baird was born in England and grew up frail and sickly, and almost died of illness many times.

However, the fragility of his body tempered his courage and perseverance to overcome difficulties. After graduating from college, he worked for an electrical company. He was meticulous in his work, and in a short time he repaired several almost obsolete machines, which were highly valued by the company.

A ruthless illness haunted him, and he had to resign to recuperate. One day in 1923, a friend told him: "Since Marconi was able to transmit and receive radio waves over long distances, it should also be possible to transmit images."

This inspired him a lot. Baird was determined to accomplish the task of "teleporting images through electricity." He sold what little property he had, collected a lot of information, and devoted all his time to the development of the television set, and finally, completed the design of the television set.

It is not easy to turn design drawings into physical prototypes. A small room that is both a bedroom and a studio. Although he was afflicted by illness, he still worked tenaciously, often fighting day and night, eating bread when he was hungry, sleeping in kimono when he was sleepy, and replacing it with old tea boxes, old hat lids, knitting needles, etc., when he had no money to buy experimental equipment.

After a long period of hard work and countless failures, Baird finally brought the image of the human to the screen with an electric signal. In 1929, the BBC allowed Baird to conduct public television broadcasting. After the 30s, Baird turned to the study of color television, and achieved something.