TFT (Thin Film Transistor) is an abbreviation for thin film transistor. TFT display screen is a mainstream display device on various laptops and desktops. Each liquid crystal pixel on this type of display screen is driven by a thin film transistor integrated behind the pixel. Therefore, TFT display screen is also an active matrix liquid crystal display device. TFT display screen has the advantages of high responsiveness, high brightness, high contrast, etc., and its display effect is close to CRT display screen.