There was no “main” person to invent the television. It took a lot of different brains and time to create what we have today. The idea started in the 1830s and 40s when the telegraph and telephone were invented.
The first step was when Samuel F. B developed the telegraph which allowed messages being sent through wires. Which follows up to Alexander Graham Bell inventing the telephone allowing voices to travel through distance. With the two combined it created a lee way for Paul Nipkow to make a system to send images through moving discs. He named it the electric telescope, otherwise known as the early form of a television.
Mechanical Television was the first to be commercially produced. On March 25th 1925, Scottish inventor John Logie Baird gave the first ever demonstration of moving images on a television screen. This television was the first to utilize a cathode ray tube and its history can be traced back to the 19th century experimentation which involved cathode rays and electro-mechanical projectors.
Although Mechanical television was groundbreaking, it had limitations in quality and that made it hard to use at home. This led to the development of electronic television, which had a much better image and capabilities. In 1927, Philo Farnsworth invented the first fully electronic television system. Farnsworth’s "image dissector" was able to convert images into electrical signals without any mechanical components. This was a significant improvement from the rotating discs of mechanical TV. Around the same time, Vladimir Zworykin, developed a camera tube called the “Iconoscope,” which was also instrumental in the advancement of electronic television technology.
The two inventors, Farnsworth and Zworykin, later were part of a long patent argument.
In 1934 Farnsworth won the battle when the patent office ruled in his favor. This secured his name for the invention of the electronic television.
In 1939, at the New York World Fair, television made a big public introduction. RCA broadcast the opening ceremonies and this marked history in American culture.
By the 1950s, television was typical of every household, and it became the main source of entertainment and news, surpassing radio. Over time inventors and scientists have created the evolution of television from mechanical TV to today’s very thin high-definition smart TVs. These inventions and upgrades in technology has shaped the way we watch TV, get our content, and connect with each other through a screen.
https://www.history.com/news/who-invented-television
https://www.tcl.com/global/en/blog/playbooks/history-of-tv