P.133: 3D Multi‐Touch System by Using Coded Optical Barrier on Embedded Photo‐Sensors
H.-C. Fang, Guo‐Zhen Wang, Chia‐Wei Chang, Yi‐Pai Huang · SID Symposium Digest of Technical Papers · 2013
Abstract 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.