Form And Function Of TV Covers

Television is a box-shaped device that can receive television signals and turn them into moving images on a screen with audio to its speakers. The devices are built in a transparent and photosensitive cathode. Signals are transferred to the transmitter from which they are sent to the recipients. The signals may, among other things, be captured by an antenna, a satellite dish (if there is satellite TV covers), or cables.

The idea to transmit images from one place to another emerged over several decades with the help of lots of other inventions. Light structure and properties became clear to scientists in the late 1800s. The discovery of electrons in 1897 had a great impact on people’s understanding of light. New discoveries in physics laid the foundations for the transmission and reception of light. German Karl Ferdinand Braun came up with ideas on television back in the 1800s.

In addition to PAL (short for Phase Alternating Line) is used Algeria, Brazil, Europe (except France), Africa and China; NTSC (short for National Television Systems Committee) is used in America (except Brazil), Japan, Korea and Taiwan. SECAM (Sequential Color with Memory) used in France and many Eastern European countries.

In 1872, English telegraph worker Joseph May, discovered that it was possible to convert light into an electrical signal. German engineer Paul Nipkow, later invented the Nipkow disc, where images are read through a spiral of holes. This idea was later on employed by John Logie Baird from the UK and Charles Francis Jenkins from America to build the world’s first television.

But Charles Jenkins and Logie Baird’s efforts were not met with any kind of respect. In fact, they faced derision and indifference to begin with. An article from the British newspaper, the British journal wrote that television was was a waste of time because you could not make money from it. But despite this, they continued their work, and in 1928 regular television broadcasts began. Not many years later the first television boom became a reality and thousands of viewers had now invested in a television or built a primitive one.

Color televisions were the next big thing. In the early 1900s, there were many who tried to invent a system where the TV can show colors, but the technology was just not there yet. It was in 1954 in America, when the first color system went into production. It cost $ 1000 and had a 12 inch screen. It was almost three times as expensive as a black and white television, which cost about $ 300 and had a 21 inch screen.

Televisions have mainly been used to entertain, inform and educate. They brought visual news and information to a broad audience, this created some major developments in aspects such as propaganda and mind manipulation, where sublime messages were often used in advertising.

TV news got started pretty quickly, but people already knew what was on the news since it took a couple of days before they could send the film material because of long transport routes and clumsy film systems. Color television arrived in the U. S. In 1953 via CBS. The U. S. Government approved the color television system, CBS had developed. A TV channel consists of picture and sound in the form of electronic signals, which are broadcast on a radio frequency. When selecting the channel on his TV so you select the frequency you want to receive and converts it into signals that can control the electron gun and the speakers.

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