What is the principle of the touch screen to feel the touch of the object?

The touch screen market continues to expand because the demand for electronic products is also increasing, especially when we go out, subways, restaurants, hotels, or auto shows, or airports, there will be more touch screen applications. First I think it’s convenient, and the information that customers can find is faster. For many people, it saves a lot of time and saves a lot of time. This is the advantage of the touch screen!
As a special computer peripheral, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. It gives multimedia a new look and is a very attractive new multimedia interactive device. The application range of touch screens in our country is very broad, mainly for public information inquiry; such as business inquiry of telecommunication bureau, taxation bureau, bank, electric power and other departments; information inquiry of city streets; in addition, it is used in leadership office, industrial control, military command, etc. Electronic games, ordering songs and dishes, multimedia teaching, real estate pre-sales, etc.
Especially the information query service in public places, its use and promotion greatly facilitate people to consult and obtain various information. But how much do you know about touch screens? 1. Types and principles of touch screens The basic principle of touch screens is that when a finger or other object touches the touch screen installed on the front of the display, the touched position (in the form of coordinates) is detected by the touch screen controller and passed through an interface (such as RS-232). The serial port) is sent to the CPU to determine the input information.
  The touch screen system generally includes two parts: a touch screen controller (card) and a touch detection device. Among them, the main function of the touch screen controller (card) is to receive touch information from the touch point detection device, convert it into contact coordinates, and then send it to the CPU. It can also receive commands from the CPU and execute them: touch detection The device is generally installed at the front of the display, and its main function is to detect the user's touch position and send it to the touch screen control card.