What are the main types of LCD touch screens?

From the technical principle, the LCD touch screen can be divided into five basic categories: vector pressure sensing technology LCD touch screen, resistance technology LCD touch screen, capacitance technology LCD touch screen, infrared technology LCD touch screen, surface acoustic wave technology LCD touch screen. The vector pressure sensing technology, LCD touch screen, has retired from the historical stage; Infrared liquid crystal touch screens are inexpensive, but their outer frame is fragile and prone to light interference, resulting in distortion in curved surfaces; The design theory of capacitive screens is good, but the problem of image distortion is difficult to fundamentally solve; The positioning of the resistance screen is accurate, but its price is quite high and it is afraid of being scratched and easily damaged; The surface acoustic wave liquid crystal touch screen has solved various defects of the previous liquid crystal touch screen, which is clear and anti violent, and suitable for various occasions. However, the water drops and dust on the screen surface will make the liquid crystal touch screen dull, or even not work.