Patent ID: 8350816
Filing Date: 2013-01-08
Classification: G06F

Abstract:
1. A display device comprising: a display panel including a plurality of pixels each having a gray scale according to the difference voltage between a voltage applied to an associated pixel electrode and a voltage applied to a common electrode, the common electrode facing the pixel electrodes; a driver circuit that supplies data signals to the pixel electrodes and supplies a common signal alternately switched between a first voltage and a second voltage higher than the first voltage to the common electrode; a touch panel substrate that is laminated on the display panel and includes a plurality of detection electrodes; and a detector circuit that performs touch detection on the detection electrodes, wherein the detector circuit includes wherein the detector circuit has a settling period in which alternately turning on and off the first and second switches is repeated and a counting period, which follows the setting period and in which touch detection on the detection electrode is performed on the basis of time required until a voltage at the node reaches a preset reference voltage while the first switch is turned off and the second switch is turned on, and wherein the driver circuit switches the common signal between the voltages while the second switch is turned on in the settling period.