In a method for detecting overlapped function area on a touchpad with the overlapped function area overlapped by more than two different function areas, when the overlapped function area is touched by an object, a further function can be correctly performed according to touched duration, touched movement,...http://www.google.com/patents/US7742038?utm_source=gb-gplus-sharePatent US7742038 - Method for detecting overlapped function area on a touchpad
