Working Principle:

Infrared touch interactive whiteboard adopts infrared technology to enable finger, gloved hand or any other opaque object to touch directly to control PC rather than needing to use a special pen. There are large numbers of infrared senders and receivers placed around all the four sides of infrared touch Interactive whiteboard closely, which comprise a dense matrix vertically and horizontally. When something touches some point of the whiteboard, which blocks the corresponding vertical and horizontal infrared rays, the X/Y coordinate is decided, then the computer would easily know at where you give your command.