When opening the LCD shell you will find several circuit boards. Among them, a circuit board with a large area and a relatively compact design is the main board of the liquid crystal display, which is usually called a driving board. The function of the driver board is to process and control the signal sent from the outside, and then send it to the LCD panel to display the image. The more important integrated circuits on the driver board are the main control chip (Sealer chip) and the microcontroller (MCU). The input interface of the driver board is connected to the main board of the computer main board graphics card through the connection line, and the output interface is connected to the LCD panel through one or two signal transmitted cables .