The infrared touch screen makes use of densely distributed IR matrix in X and Y directions to detect and locate the user’s touch.It is equipped with a circuit board frame in front of the display.The circuit board frame is equipped with infrared emitting tube and infrared receiving tube on the four sides of screen,corresponding to each other to form horizontal and vertical cross infrared matrix.When user’s finger in the IR touch frame,the finger will block two infrared rays passing through this location .Thought this, he determines the position of the touch points.
The external infrared touch overlay is a kinds of highly integrated electronic circuit integrated products.ir touch overlay including complected integrated control circuit, a set of high-precision, anti-interference infrared emitting tubes and a set of infrared receiving tubes.They are separately mounted on a highly integrated circuit board, forming an indispensable two opposite directions.The embedded smart control system in control circuit continuously pulses the diodes to form a grid of infrared polarized light beams.When touching object like finger enter raster ,the lights will be resisted.IR touch panel is disturbed by current, voltage and static electricity,which apply to all kinds of severe environments.It’s advantages are low price ,easy installation ,good stability ,long age and high light transmittance.And it can keep clear and light pictures no drive, no calibration, plug and play.
