elo touch screen displays.This touch screen is made of a transparent metal layer coated on a glass plate as a conductive body, and there are narrow electrodes on the four sides of the touch screen to form a low-voltage AC electric field in the conductive body. When a finger touches a metal layer or a conductive object touches, the capacitance changes, so that the frequency of the oscillator connected to it changes, and the touch position information can be determined by measuring the frequency change. Because the capacitance changes with temperature, humidity, or ground conditions, its stability is poor, and drift often occurs. The advantage of this type of touch screen is that it is not affected by oil pollution.

elo touch screen displays.This touch screen is made of a transparent metal layer coated on a glass plate as a conductive body, and there are narrow electrodes on the four sides of the touch screen to form a low-voltage AC electric field in the conductive body. When a finger touches a metal layer or a conductive object touches, the capacitance changes, so that the frequency of the oscillator connected to it changes, and the touch position information can be determined by measuring the frequency change. Because the capacitance changes with temperature, humidity, or ground conditions, its stability is poor, and drift often occurs. The advantage of this type of touch screen is that it is not affected by oil pollution. IQTouch K interactive touch screen feature 20-point touch and dual system -- Android 8.0 system and optional OPS Windows 10Pro system. Its 4K UHD resolution facilitates presentations and collaboration. With optional multi-screen casting software, IQClass 6.0 and installation-free IQClass Plus software, IQTouch K Series can help create an interactive and collaborative teaching atmosphere in class.