Date d invention de la télévision

The way people watch tv has changed dramatically since the medium first burst onto thé scene in auto 1940s and ‘50s and forever transformed American life. Te after decade, tv technology has actually steadily advanced: color arrived in auto 1960s, followed passant par cable in auto ‘70s, VCRs in the ‘80s et high-definition in the late ‘90s. In auto 21st century, viewers room just ont likely venir watch shows conditions météorologiques cell phones, laptops and tablets ont on a la télé set. Amazingly, however, all these technological changes to be essentially seulement improvements conditions météorologiques a basic système that has operated since auto late 1930s—with root reaching even further earlier than that.

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Early la télé Technology: mechanically Spinning Discs

No seul inventor deserves credit pour the television. The idea to be floating about long avant the modern technology existed à make it happen, and many scientists and engineers made contributions that built conditions météorologiques each other to eventually produce what conditions météorologiques know ont TV today.

Television’s origins can be traced to the 1830s et ‘40s, as soon as Samuel F.B. Morse developed thé telegraph, auto system du sending annonces (translated right into beeping sounds) follow me wires. Autre important action forward came in 1876 in thé form of alexander Graham Bell’s telephone, which allowed the human voice to travel v wires over long distances.

Both Bell and Thomas Edison speculated about auto possibility of telephone-like tools that might transmit images as well as sounds. But it to be a German researcher who took auto next considérable step towards developing auto technology that fabriqué television possible. In 1884, paul Nipkow come up with a system of sending images through wires par spinning discs. Cette called cette the électricité telescope, marqué it was essentially an early form du mechanical television.

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TV Goes digital With Cathode rayonner Tubes

In thé early 1900s, both Russian physicist Boris Rosing et Scottish engineer un lion Archibald Campbell-Swinton operated independently à improve nous Nipkow’s system par replacing auto spinning discs through cathode ray tubes, a an innovation developed earlier de German physicist knife Braun. Swinton’s system, which placed cathode ray tubes inside the caméra that sent a picture, oui well ont inside the receiver, to be essentially the earliest all-electronic tv system.

Russian-born engineer Vladimir Zworykin had actually worked ont Rosing’s assistant avant both ns them emigrated following the Russian Revolution. In 1923, Zworykin to be employed at auto Pittsburgh-based manufacturing société Westinghouse when he applied à la his tons television patent, à la the “Iconoscope,” which provided cathode rayon tubes venir transmit images.

Meanwhile, Scottish engineer john Baird gave auto world's tons demonstration de true television before 50 scientists in central London in 1927. V his new invention, Baird formed thé Baird Television advance Company, et in 1928 ce achieved the tons transatlantic television dévolution between London and New York and the first transmission to a delivery in mid-Atlantic. Baird is likewise credited with giving the sapin demonstration of both color and stereoscopic television.

Vous lisez ce: Date d invention de la télévision

In 1929, Zworykin demonstrated his all-electronic television système at a convention of radiophonique engineers. In the public was David Sarnoff, année executive at Radio corporation of amérique (RCA), auto nation’s biggest la communication company at the time. Bondir into a poor Jewish family in Minsk, Russia, Sarnoff had come to new York City oui a child et began his career ont a telegraph operator. He was in reality on duty on the night du the Titanic disaster; although he likely didn’t—as hey later claimed—coordinate distress annonces sent venir nearby ships, he did aid disseminate auto names of the survivors.


April 30, 1939, nouveau York City: This is the scene viewed nous the television receivers in thé metropolitan area, as the denchères Broadcasting company inaugurated the life regular television service to auto American public telecasting auto ceremonies marking the opening ns the new York World's Fair. Later, viewers heard and saw president Roosevelt proclaim the fair open.

Bettmann passant par Getty Images

Sarnoff was among auto earliest à see the television, favor radio, had enormous potential oui a medium à la entertainment as well ont communication. Named president du RCA in 1930, he hired Zworykin venir develop and improve television technology parce que le the company. Meanwhile, an American inventor named Philo Farnsworth had actually been working conditions météorologiques his very own television system. Farnsworth, who flourished up nous a farm in Utah, reportedly came up through his super idea—a vacuum roques that could dissect images into lines, transmit those lines and turn them earlier into images—while still a teenager in chemistry class.

In 1927, at the lâge of 21, Farnsworth completed the prototype ns the first working completely electronic la télé system, based nous this “image dissector.” cette soon uncovered himself embroiled in a long legal fight with RCA, which asserted Zworykin’s 1923 patent take it priority over Farnsworth’s inventions. Auto U.S. Patent bureau ruled in favor ns Farnsworth in 1934 (helped in aller by an old high lécole teacher, who had actually kept a vital drawing par the jeune inventor), and Sarnoff was at some point forced à pay Farnsworth $1 million in license fees. Despite viewed passant par many historians oui the true father ns television, Farnsworth never ever earned much more from his invention, and was dogged de patent very nice one lawsuits native RCA. Cette later moved nous to est différent fields of research, including nuclear fission, and died in blame in 1971.

Sarnoff, with his company's commercialisation might, presented the public to tv in a super way at thé World’s same in nouveau York ville in 1939. Under auto umbrella of RCA’s transfer division, the national Broadcasting lentreprise (NBC), Sarnoff broadcast auto fair’s opened ceremonies, consisting of a speech by President Franklin D. Roosevelt.

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The Rise de a new Medium

By 1940, there were seulement un a couple of hundred televisions in use in thé United States. With radiophonique still dominating the airwaves—more than 80 percent of American homes owned one at thé time—TV use thrived slowly end the arttasters of the decade, et by thé mid-1940s, the United States had actually 23 television stations de diffusion (and counting). De 1949, a année after the debut de the struggle variety seul Texaco étoiles Theater, hosted par comedian Milton Berle, the pays boasted 1 million tv sets in use.

By auto 1950s, television had truly entered thé mainstream, with more than fifty percent of toutes les personnes American residences owning la télé sets de 1955. Ont the alors of consumer expanded, nouveau stations were created et more programs broadcast, and by auto end du that decade tv had replaced radio oui the henn source du home divertir in auto United States. During the 1960 presidential election, the young, handsome homme F. Kennedy had a noticeable benefit over his less telegenic opponent, Richard M. Nixon in televised debates, and his success that autumn would carry home à la many Americans the transformative dommage of thé medium.