Nowadays, with the continuous progress of the times, the use of industrial displays has become more and more extensive, and industrial touch displays also have a variety of touch methods. The common ones are capacitive, resistive and infrared touch. Presumably for infrared touch displays, Everyone knows relatively little, the following is a small editor of Zhixiang Smart to popularize the advantages and applications of infrared touch monitors, and I hope it will be helpful to everyone.
The advantage of infrared touch screen is that it can be touched with fingers, pens or any object that can block light. The disadvantage of the infrared touch screen is that it does not feel good when used on a spherical display, because the infrared grating matrix that depends on the work is obviously required to be on the same plane. Therefore, the real touch sensing work plane has a large distance from the curved display screen, especially in Corners, but this shortcoming does not exist on flat-panel displays, such as liquid crystal displays.
On flat-panel displays, infrared touch screens have considerable advantages. Infrared detection technology uses the same wavelength infrared emitting tube and infrared receiving tube to obtain a simple infrared detection method: when an object blocks the connection between the infrared pair of tubes, the received signal will drop sharply. System, anti-theft system, counter and other systems are widely used.
If infrared is used in a short distance, the degree of blocking can be detected according to the attenuation of the received signal. This is the so-called analog method. The analog method uses a dense array of receiving tubes at the receiving end and can also be used for contrast imaging; in order to prevent interference, infrared detection The pulse mode can also be used. The infrared transmitter tube emits a fixed frequency signal, and the receiver only needs to detect this frequency. The pulse mode has a very strong anti-interference ability. If the pulse mode modulates the signal at the working frequency, it can also be used for digital communication. This is the famous infrared communication, household appliance remote control, computer infrared communication, and even the fastest optical fiber communication today. Infrared communication has no effect on the human body.
