A method for identifying a movement of single tap includes having detected
the movement of the object contacting the touch device initiating to
start time counting, having detected the movement of the object
contacting the touch device terminating and a first time span being
obtained and generating a control signal indicating the movement of
single tap in case of the first time span being less than a second time
span, the first time span being greater than a preset time span and only
one contacting time being greater than the preset time with the second
time span.