Imagine the life of modern man without TV is simply impossible. He and the news reports, and entertains and educates … The choice of this technology – not easy. The shops are a wide number of models, and all of them, with On the one hand, resemble each other, on the other – just different. What do you do? Read this story on, of course! Choice TV – is not easy. The shops are a wide number of models, and all of them, on the one hand, resemble each other, on the other – just different.
What do you do? Read this story on, of course! First, decide the breadth of perception to the screen. It must take into account the area of the room and distance of location from which you watch TV, such as the sofa. There are several diagonal screen size (it is indicated in inches, 1 inch = 2.54 cm): 14''(37 cm) 20''(51 cm) 21''(54 cm) 25''(63 cm ) 29''(72 cm) 32''(81 cm) 34''(87 cm) 36''(92 cm) or more. The recommended distance to the screen should be 3-5 times more than its diagonal. Thus, the TV screen at 21 inches should be no closer than 162 cm away.
Slightly shorter distance is acceptable for large models with a sweep in 100 Hz and additional image processing systems that make screen flicker is no longer harmful to the eyes. History in pictures in the traditional CRT TVs (CRT) and CRT sizes images are different. CRT glass is indented on the perimeter of the screen, on which there is no picture. Such a TV with a diagonal of 15''shows only 14.'' The image they have formed with the help of electronic gun: she 'shoots' rays on the inner surface of the tube coated with a special layer. Rays running across the screen from left to right and top to bottom, making each point of light red, green or blue light.