17 inch touch screen laptop.In order to measure along the Y- axis, the upper-left and upper-right corners are offset to VREF , and the lower-left and lower-right corners are offset to 0V . Because the upper and lower corners are the same voltage, the effect is about the same as the bus connecting the top and bottom edges, similar to the method used in a four-wire touch screen. The advantage of this measurement algorithm is that it keeps the voltages at the top left and bottom right unchanged; but if grid coordinates are used, the X and Y axes need to be reversed. For a five-wire touch screen, the best connection method is to connect the upper left corner ( biased as VREF) to the positive reference input of the ADC , and the lower left corner ( biased to 0V) to the negative reference input of the ADC .

17 inch touch screen laptop.In order to measure along the Y- axis, the upper-left and upper-right corners are offset to VREF , and the lower-left and lower-right corners are offset to 0V . Because the upper and lower corners are the same voltage, the effect is about the same as the bus connecting the top and bottom edges, similar to the method used in a four-wire touch screen. The advantage of this measurement algorithm is that it keeps the voltages at the top left and bottom right unchanged; but if grid coordinates are used, the X and Y axes need to be reversed. For a five-wire touch screen, the best connection method is to connect the upper left corner ( biased as VREF) to the positive reference input of the ADC , and the lower left corner ( biased to 0V) to the negative reference input of the ADC . 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.