Infrared emission and receiving tubes are arranged within the frame of the touch screen. The internal control circuit has been continuously scanning each tube signal to monitor its strength changes. When objects (fingers, gloves or any opaque objects) are enterring the touch area, the horizontal and vertical receiving tubes in their corresponding location will detect the strength changes and then the circuit will convert coordinate data according to the location of receiving tubes and send them out to PC.

Thanks to infrared technology, Labwe Touch Screen can run without touch pressure or glass. On conversion of coordinate data, 4096*4096 resolution can be realized by interpolating point data.