Display device with touch sensor, control system and control method thereof

A control method using a control system which controls a distance variable mechanism provided to a display device with a touch sensor, the display device including:

• a display panel;
• a capacitance type touch sensor which is provided by being superimposed on the display panel;
• and
• the distance variable mechanism which changes distance between the touch sensor and the display panel, wherein the control system includes:
• a signal input unit which receives a detection signal outputted from the touch sensor;
• a display monitor which displays the detection signal inputted to the signal input unit;
• a drive unit which supplies a driving force for changing the distance between the touch sensor and the display panel to the distance variable mechanism;
• a control unit which electrically controls the driving force that is supplied to the distance variable mechanism from the drive unit;
• and
• an indicator unit which displays a touch position on the display panel based on the detection signal inputted to the signal input unit, the control method comprising:
• adjusting the distance between the display panel and the touch sensor by operating the control unit in such a manner that an external noise contained in the detection signal displayed on the display monitor is reduced.