What are the types of touch screen? Touch screen is a device that can sense and respond to the user's touch operation, which is widely used in various electronic devices such as mobile phones, tablets, computers, vending machines and so on. According to different technical principles and working methods, touch screens can be divided into many types. The following describes several common touch screen types.

1. Resistive Touchscreen (Resistive Touchscreen) : Resistive touchscreen is one of the earliest touch screen technologies. It consists of two thin layers with tiny gaps sandwiched between the upper and lower layers. When the user presses the screen with a finger or stylus, the resistance between the upper and lower layers changes to determine the position of the touch. Resistive touch screens have high accuracy and durability, but poor support for multi-touch.

2. Capacitive Touchscreen: Capacitive touchscreen is one of the most widely used touch screen technologies. It takes advantage of the capacitive properties of the human body to determine the position of the touch by sensing the electric charge of the user's finger. Capacitive touch screens have high sensitivity and response speed, support multi-touch, and have better transparency and durability.

3. Surface Acoustic Wave Touchscreen (Surface Acoustic Wave Touchscreen) : Surface acoustic wave touchscreen takes advantage of the principle of sound wave propagation on the glass surface. The surface of the touch screen is covered with a layer of ultrasonic sensors, and when the user touches the screen, the sound waves change to determine the touch position. Surface acoustic wave touch screens have high transparency and image quality, but poor support for multi-touch.

4. Surface Capacitive Touchscreen (Surface Capacitive Touchscreen) : Surface capacitive touchscreen is an improved version of capacitive touchscreen. It covers the surface of the screen with a conductive coating, and when the user touches the screen, the electrical charge of the conductive coating changes to determine the touch position. The surface capacitive touch screen has high sensitivity and reaction speed, supports multi-touch, and has good transparency and durability.

5. Projected Capacitive Touchscreen: Projected capacitive touchscreen is currently the most widely used capacitive touchscreen technology. It covers the surface of the screen with a layer of conductive glass or conductive film and determines the touch position by sensing the charge change at the touch position. The projected capacitive touch screen has high sensitivity and reaction speed, supports multi-touch, and has good transparency and durability.

The above are several common touch screen types, each type has its own characteristics and application scenarios. With the continuous development of science and technology, touch screen technology is also constantly innovating and improving to provide users with a better touch experience.