Single-point touch screen technology has two major shortcomings. One is that resistive touch screen technology relies on the physical movement of the touch screen. Although it has little effect, its performance will decline after normal wear and tear; the other is that this technology only supports single-point touch. , That is, you can only use one finger to make a single action on a certain area of the screen at a time. To fully utilize the functions of applications and operating systems, multiple fingers are required to achieve optimal usability. The multi-touch system is a touch control method that uses multiple fingers, just like playing a musical instrument or other two-handed operations. In addition, this system technology can also allow multiple users to communicate with each other at the same time, such as an interactive TV wall, or direct manipulation of a computer, using this sensory technology (strictly speaking, it is A sensory-driven technology) can provide high resolution, using both hands to operate in complex multi-point windows.
The application of multi-touch screen technology is more and more widespread. Nowadays, almost all personal electronic products such as mobile phones use touch screen technology, and many large hospitals, shopping malls, libraries and other places have multi-touch screen technology inquiry machines or other forms of touch screen products. . Multi-touch is also known as multi-touch, multi-point sensing, multi-sensing, etc. The system is a technology that adopts human-computer interaction technology and hardware equipment to realize the technology, which can carry out human and computer without traditional input devices (such as mouse, keyboard, etc.) The interactive operation, or the combination of input and output devices, all input and output operations are performed on the display. Compared with the single-point touch screen technology, the multi-point touch technology can be implemented on a touch screen (screen, desktop, wall, etc.) while simultaneously accepting multiple points of input information.
Mainstream touch screens are divided into resistive touch screens, surface capacitive touch screens, emission capacitive touch screens, surface acoustic wave touch screens, infrared touch screens, etc. Among them, infrared and emission capacitive touch screens can support multi-touch. The former cannot meet the requirements of consumer products due to size limitations and low linearity, while emission capacitive touch screens are relatively acceptable due to its relatively acceptable cost and good linearity. Degree and operability are the current mainstream multi-touch screen technology.
