DISPLAY DEVICE WITH TOUCH SENSOR

摘要

Disclosed is a display device that has a touch sensor and that, without using a special circuit, can avoid the effect of noise caused by polarity inversion of a common voltage of the display device. The display device with a touch sensor is provided with: a sensor output read circuit (21) that is sequentially connected to a plurality of sensor electrodes of a touch sensor unit (7) and that outputs a signal voltage in accordance with the electrical properties of each electrode; a sensor control circuit (23) that supplies a control signal to the sensor output read circuit (21); and a coordinate computation circuit (22) that detects a touch position on the basis of the aforementioned signal voltages. The sensor control circuit (23) starts a scan operation-which sequentially connects the sensor output read circuit (21) to all of the sensor electrodes of the touch sensor unit (7) and causes the output of the aforementioned signal voltages-after the common voltage has switched from a first polarity to a second polarity, and ends said operation before the common voltage reverts to the first polarity.