P.133: 3D Multi‐Touch System by Using Coded Optical Barrier on Embedded Photo‐Sensors

Limited by construction complexity, bare finger touch systems are not ready to be used on mobile devices. Hence, we proposed a system using coded optical barrier with less hardware and software complexity; based on the construction, touch algorithm is programed to obtained 3D location (x,y,z) of input(s). Finally, our concept was implemented on a 4-inch panel. The system was able to sense up to 3 touch inputs simultaneously within 35 mm working range.