An array of infrared Light Emitting Diodes (LEDs) and photo detector pairs are placed around the edges of the panel. The LEDs are placed both horizontally and vertically creating a grid of infrared light beams. When a finger or any object touches the screen, the grids of LED beams are obstructed, helping to find out the X and Y positioning of the object approaching the touch screen.

Infrared touch screen can detect any object (e.g. finger, stylus, glove etc.) approaching the touch screen, which makes it a desirable technology to use. Additionally, it can be scaled to any size without losing the resolution. Light transmission is also considered better than resistive touch screens.

The figure above showcases the front view of infrared touch screen.


Figure above showcases the touch event caused in infrared touch screen