How does a monochrome LCD screen work? part two

From the perspective of the structure of the LCD display, whether it is a laptop or a desktop system, the LCD display screen used is a layered structure composed of different parts. The LCD consists of two glass plates with a width of about 1mm, separated by a 5um uniform spacing containing liquid crystal (LC) material. Because the liquid crystal material itself does not emit light, there are lamp tubes as light sources on both sides of the display screen. There is a backlight panel (or uniform light panel) and reflective film on the back of the LCD display. The backlight panel is composed of fluorescent substances. It can emit light and its main function is to provide a uniform background light source. The light emitted by the backlight passes through the first polarizing filter layer and enters the liquid crystal layer containing thousands of crystal droplets. The crystal droplets in the liquid crystal layer are contained in a small cell structure, and one or more cells constitute a pixel on the screen. Between the glass plate and the liquid crystal material is a transparent electrode. The electrode is divided into rows and columns. At the intersection of the rows and columns, the optical state of the liquid crystal is changed by changing the voltage. The function of the liquid crystal material is similar to that of small lights. valve. Around the liquid crystal material are the control circuit part and the drive circuit part. When the electrodes in the custom LCD display generate an electric field, the liquid crystal molecules twist, thereby regularly refracting the light passing through it, and then filtering it through the second filter layer and displaying it on the screen.