The advantages of LCD displays are low power consumption, small size, and low radiation. The resolution of the LCD screen can be very high, and the pixel value of an ordinary mobile phone can reach more than 300. Flat, thin and light, saving a lot of raw materials and space; low power consumption, serialized size, diverse varieties, convenient and flexible use, easy maintenance, update and upgrade, long service life and many other features, it is a full-size display terminal; the display quality ranges from simple to simple of monochrome character graphics to high-resolution, high-color-fidelity, high-brightness, high-contrast and high-response displays of all sizes and models. Display methods include direct view, projection, perspective and reflection