The working principle of LCD touch screen

For ease of operation, people use touch screens instead of mice or keyboards. When working, we must first touch the touch screen installed on the front of the monitor with our fingers or other objects, and then the system locates and selects information input based on the icon or menu position touched by our fingers. The touch screen is composed of a touch detection component and a touch screen controller; The touch detection component is installed in front of the display screen to detect the user's touch position and receive and send the touch screen controller; The main function of the touch screen controller is to receive touch information from the touch point detection device, convert it into contact coordinates, and send it to the CPU. It can also receive commands from the CPU and execute them.