According to the working principle of the touch screen and the medium for transmitting information, we divide the touch screen into four types, which are resistive, capacitive, infrared and surface acoustic wave.
1. Resistive touch screen: It is a working environment that is completely isolated from the outside world and is not afraid of dust and water vapor. It can be touched with any object and can be used for writing and drawing. It is more suitable for use by limited people in industrial control fields and offices.
2. Capacitive touch screen: It uses the current induction of the human body to work. The light transmittance and clarity of the capacitive touch screen are better than the four-wire resistive screen, and of course it cannot be compared with the surface acoustic wave screen and the five-wire resistive screen. Capacitive screens reflect serious light, and the four-layer composite touch screen of capacitive technology has uneven light transmittance to light of various wavelengths, and there is a problem of color distortion. Due to the reflection of light between layers, image characters are also blurred.
3. Infrared touch screen: Multi-level self-adjusting and self-recovering hardware adaptability and highly intelligent discrimination and recognition, which can be used arbitrarily in various harsh environments for a long time. And can be customized for users to expand functions, such as network control, sound sensing, human proximity sensing, user software encryption protection, infrared data transmission, etc. The other major shortcoming of the infrared touch screen promoted by the original media is its poor riot resistance. In fact, the infrared screen can use any riot glass that the customer thinks is satisfactory without increasing the cost and affecting the performance. This is something other touch screens cannot imitate.
4. Surface acoustic wave touch screen: high definition and good light transmittance. High durability, good scratch resistance (have a surface film relative to resistance, capacitance, etc.). Responsive. Not affected by environmental factors such as temperature and humidity, high resolution, long life (50 million times under good maintenance); high light transmittance (92%), can maintain clear and bright image quality; no drift, just install it One-time calibration; there is a third axis (ie pressure axis) response, which is currently used more in public places.