Television (TV) is a telecommunications medium for transmitting moving images and sound.The word television comes from Ancient Greek (tele) ‘far’ and Latin visio ‘sight’.There have been many different television systems and developments, small to large, analogue to digital, network to streaming and Internet, and CRT to LCD.
History of Television
Television first became available in a crude mechanical format during the 1920s. Still, it was not until the 1940s that an improved form of black-and-white television broadcasting became popular in the UK and the US, when television sets became commonplace in homes. In the mid-1960s, colour broadcasting was introduced in most Western countries. Regarding viewing devices, we have mechanical TVs, cathode-ray tube TVs (CRTs), plasma TVs, and LCD/OLED TVs.
Television images resemble those produced by traditional photographic perspectives. Early mechanical televisions, developed independently by John Logie Baird (1926) and Charles Francis Jenkins (1923), employed rotating disks with hole patterns. The first electronic television was invented by Philo Taylor Farnsworth in 1927 at age 21, who envisioned a system to capture and transmit moving images via radio waves. Farnsworth’s primitive camera first transmitted a simple line, followed by a dollar sign after an investor’s inquiry.
3-D Television
3-D television shows and films can mimic stereoscopic perception by presenting two different images to each eye. The most popular modern method of creating 3-D stereoscopic images for film and television is light polarisation (with associated polarising glasses for left/right eyes).
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