Abstract: Method and apparatus for identifying locations on a touchscreen of at least two touch events that occur within a predetermined time of one another comprises monitoring the touchscreen for touch events. Each touch event occurs at a discrete location on the touchscreen defined by an XY coordinate pair. A coordinate series is generated including at least two X coordinates and at least two Y coordinates when first and second touch events occur within a predetermined time of one another. When a release event occurs, the release event is correlated with one of the X coordinates and one of the Y coordinates in the coordinate series to form a first XY coordinate pair corresponding to the first touch event. The first XY coordinate pair associated with the first touch event is output.

Abstract: Method and apparatus for detecting multiple touch events on a touchscreen system and determining the occurrence of tie events. The system comprises a touchscreen, a touchscreen controller and a microprocessor. The touchscreen comprises a touch surface for receiving touch events. Each of the touch events occurs at a discrete location on the touch surface defined by coordinates. The touchscreen controller monitors the touch surface for the touch events. The microprocessor compares the touch events and determines a tie occurrence when the touch events occur within a predetermined time of one another.