Mobile phone LCD screen can be divided into: STN screen, TFT screen, TFD screen UFB screen, OLED screen. With the gradual popularity of color screens, the material of mobile phone screens has become more and more important. The color screen of mobile phones varies with LCD quality and R&D technology. There are several types of TFT, TFD, UFB, STN and OLED. In general, the more colors that can be displayed, the more complex images can be displayed, and the layers of the screen are more abundant.