Television Is A Key Component Of Our Daily Lives - 2485 Words

Introduction A television is a machine with a screen that is capable of displaying images. Televisions receive broadcast signals and turn them into pictures and sound. Although debated, the TV is often credited as being invented by Vladimir Zworykin a Russian-born American who worked for Westinghouse, and Philo Taylor Farnsworth, a boy in Beaver City, Utah. Vladimir held the patent for the TV, but it was Farnsworth who was the first person to first successfully transmit a TV signal on September 7, 1927. The television is a key component of our daily lives and is a marvel of engineering and utilisation of technology. Smartly incorporating complex electronic theories and concepts, the televisions has faced many developments and adaptations†¦show more content†¦A pixel is defined in television terms as the smallest area of a television image that can be shown within the parameters of the certain system. This process is accomplished by firstly analysing the image by using a photoelectric device in a series of horizontal scans from the top to the bottom of the image to create an electrical signal in which the colour and brightness values of the individual picture elements are represented as voltage levels of the respective video waveform; secondly, by transmitting the same respective values of the picture elements in a sequence as voltage levels of a video signal; and finally by reproducing the image of the original scene in a video signal display of parallel scanning lines on a viewing screen(Repairfaq.cis.upenn.edu, 2015) (wiseGEEK, 2015). The most primitive form of televisions relied on a cathode-ray tube to produce images, and operated with an analog signal(Lapin, 2015). As technology has developed over time and broadcast signals transitioned from analog to digital, LCD (liquid crystal display) and plasma televisions were created. These TVs are more compact, are flatter and have crisper pictures than their cathode-ray counterparts because the bulky tube is removed, and in its stead they use a thin grid of pixels to create the images (Repairfaq.cis.upenn.edu, 2015)(Computerhope.com, 2015) (Lapin, 2015) If the sound as you hear it from the television had