best 15 inch touch screen laptop.5 , a coaxial and off-axis between the object being touched transmitting and receiving light pipe cut off, the coordinate value of the touch points on a scanning direction, determine the approximate coordinate value of a touch point in the other direction and initially rejected dummy contact ; then using the same method in the other direction, the final accurate coordinate values of all touch points, while excluding false touch points

best 15 inch touch screen laptop.5 , a coaxial and off-axis between the object being touched transmitting and receiving light pipe cut off, the coordinate value of the touch points on a scanning direction, determine the approximate coordinate value of a touch point in the other direction and initially rejected dummy contact ; then using the same method in the other direction, the final accurate coordinate values of all touch points, while excluding false touch points 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.