The components of the touch screen and how they work

Multi-touch screen means that when a person's finger touches the liquid crystal device, two or more contact points can simultaneously input and control the device. For example, when we look at the picture on the touch screen mobile phone, we can use two fingers on the image. When you touch and pull outward, you can zoom in on the image. Here you can use two-point touch, two points to control the size and rotation of the image, and even some higher-end devices, you can design a ten-finger simultaneous touch device.

The components of the touch screen:

Then, after understanding what is the working principle of multi-touch screen and touch screen, I want to know the structure of the touch screen. The common touch screen is mainly composed of two parts: the touch detection component and the touch screen controller. Different functions, the touch detection component is installed in front of the display screen for detecting the precise position of the human hand touching the touch screen and positioning, and transmitting to the touch screen controller; and the function of the touch screen controller is to receive from the touch point detecting device Touch the information, and convert it into contact coordinates, and then send it to the CPU to process the corresponding instruction. It can also receive the command sent by the CPU and execute it.

How the touch screen works:

How does the touch screen work? When a person's hand touches a graphic button on a specific area of ​​the LCD display or LED display screen, the software's tactile feedback system on the screen can drive various linkage devices according to a pre-programmed program, which can be used to replace the mechanical button. Panel, and through the LCD display screen to create a live sound and video effects. With the upgrading of various electronic device hardware (such as: advertising machine products), in order to facilitate the operation, people use touch screens instead of input devices such as a mouse or a keyboard (again, the mobile phone should be widely used). When the touch screen works, we must first touch the touch screen installed on the front end of the display with a finger or other object, and then the system can locate the selection information input according to the icon or menu position touched by the finger. With the advancement of technology, people are in the original single touch. Based on the development of multi-touch screens.