According to the technical principle, the touch screen can be divided into five basic categories: the vector pressure sensing technology touch screen, the resistance technology touch screen, the capacitance technology touch screen, the infrared technology touch screen, the surface sound wave technology touch screen.
The touch screen of vector pressure sensing technology has withdrawn from the historical stage, the infrared touch screen is cheap, but its frame is fragile, easy to produce light interference, and distorted in the case of curved surface. The design of capacitive touch screen is reasonable, but it is difficult to solve the problem of image distortion, the position of resistive touch screen is accurate, but its price is high, and it is afraid of scraping easily. The surface acoustic touch screen solves all kinds of defects of the previous touch screen, so the clarity is not easy to be damaged and suitable for various occasions. The disadvantage is that if the screen surface has water droplets and dust, the touch screen will become dull or even do not work.
According to the working principle of touch screen and the medium of transmitting information, the touch screen is divided into four types: resistive type, capacitive inductive type, infrared type and surface acoustic wave type. Each kind of touch screen has its own advantages and disadvantages. To understand which kind of touch screen is suitable for which situation, the key is to understand the working principle and characteristics of each kind of touch screen technology.