nec touch screen displays.When there is no touch on the transmitted signal and received signal waveforms, the received signal waveform is exactly the same as the reference waveform. When a finger or other object capable of absorbing or blocking the sound wave energy touches the screen, the sound wave energy that the X axis passes upwards through the finger part is partially absorbed, reflecting that the waveform has an attenuation gap on the receiving waveform, that is, at a certain time position. The received waveform attenuates a gap corresponding to the signal blocked by the finger. To calculate the gap position, you must touch the coordinate controller to analyze the attenuation of the received signal and determine the X coordinate from the gap position. After that, the same process of the Y axis determines the Y coordinate of the touch point. In addition to the X and Y coordinates that general touch screens can respond to, the surface acoustic wave touch screen also responds to the third axis Z coordinate, which can sense the user's touch pressure value. The principle is calculated from the attenuation at the received signal attenuation. Once the three axes are determined, the controller passes them to the host.

nec touch screen displays.When there is no touch on the transmitted signal and received signal waveforms, the received signal waveform is exactly the same as the reference waveform. When a finger or other object capable of absorbing or blocking the sound wave energy touches the screen, the sound wave energy that the X axis passes upwards through the finger part is partially absorbed, reflecting that the waveform has an attenuation gap on the receiving waveform, that is, at a certain time position. The received waveform attenuates a gap corresponding to the signal blocked by the finger. To calculate the gap position, you must touch the coordinate controller to analyze the attenuation of the received signal and determine the X coordinate from the gap position. After that, the same process of the Y axis determines the Y coordinate of the touch point. In addition to the X and Y coordinates that general touch screens can respond to, the surface acoustic wave touch screen also responds to the third axis Z coordinate, which can sense the user's touch pressure value. The principle is calculated from the attenuation at the received signal attenuation. Once the three axes are determined, the controller passes them to the host. 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.