4.5 Inch Color LCD Display Screens

The TFT thin-film transistor (matrix) -- which "actively" controls individual pixels on the screen -- is the origin of the so-called active matrix TFT.So how exactly do images come about?The basic principle is simple: a display screen consists of a number of pixels that can emit light of any color, and controlling each pixel to display a corresponding color does the trick.In TFT LCD, backlight technology is generally adopted. In order to accurately control the color and brightness of each pixel, a switch similar to a shutter needs to be installed after each pixel. When the "shutter" is opened, light can come through, but when the "shutter" is closed, light cannot come through.