Infrared touch panel

摘要: A touch panel system having enhanced detection which distinguishes between deliberate actuations of the and accidental other false actuations. The has a display surface surrounded by multiplicity light emitting elements receiving that define grid intersecting paths. is scanned sequentially enabling selected pairs elements. False actuation rejection involves use one or more three techniques: ignoring touches fail to block minimum number contiguous beams in both axes, excess specified maximum either axis, are duration less than time. size constraints on object touching screen, contact time programmable. These criteria enable distinguish many types hits touchings screen from person selecting an item panel. An additional feature present invention beam fault tolerance. Whenever component fails, can determine exactly element failed, mask out all future determinations whether user selection being made screen.