Patent ID: 10234994

Abstract:
A technique is provided that enables to reduce false detection on a touch panel, without limiting the time when the display panel is driven. In a touch-panel-equipped display device 1, a display control unit 30 sequentially selects gate lines, and data signals are supplied to data lines, whereby a display panel 20 is driven. A transmission circuit 410 supplies a pulse signal to transmission electrode portions 11 at timings based on a horizontal synchronization signal. A controller 400 detects a contact position on the touch panel 10, based on output signals output from a reception circuit that correspond to capacitances between the transmission electrode portions 11 and reception electrode portions 12. The controller 400 adjusts the timings of supplying the pulse signal from the transmission circuit 410 so that the point of time when the voltage of the pulse signal changes should not coincide with the period when noise of the display device due to the supply of data signals occurs.