| 主权项 |
1. A touch detection function-attached display apparatus comprising:
a plurality of common driving electrodes which are disposed in parallel so as to extend in one direction and are applied with an AC signal and a DC potential; a display device which has a plurality of pixel electrodes and performs display based on a pixel signal applied to the plurality of pixel electrodes and a display driving signal applied to the plurality of common driving electrodes; a touch detection device which has a touch detection electrode and detects an externally approaching object based on a touch detection signal outputted from the touch detection electrode with a touch detection driving signal applied to the plurality of common driving electrodes; and a scan driving unit which
performs a first scan driving in which the display driving signal is sequentially applied to the plurality of the common driving electrodes in a time division manner and the pixel signal is applied to a pixel electrode corresponding to a common driving electrode which is applied with the display driving signal, in synchronization with the application of the display driving signal,performs a second scan driving in which the touch detection driving signal is sequentially applied to the plurality of the common driving electrodes in a time division manner at a scan speed different from that of the first scan driving, andapplies the DC potential to the common driving electrodes which are not selected as an object of the first scan driving and the second scan driving, wherein, in the first scan driving, the scan driving unit applies the AC signal as the display driving signal to the plurality of common driving electrodes, the touch detection driving signal includes a DC portion and a pulse portion, a horizontal time interval includes a pixel signal application time interval where the pixel signal is applied to the display device, and a time interval other than the pixel signal application time interval, in the second scan driving, the scan driving unit applies the DC potential as the DC portion to the plurality of common driving electrodes in the pixel signal application time interval and applies the AC signal as the pulse portion to the plurality of common driving electrodes in the time interval other than the pixel signal application time interval, in the first scan driving, the scan driving unit applies the display driving signal to one of the plurality of common driving electrodes for each horizontal time, in the second scan driving, the scan driving unit applies the touch detection driving signal to two or more common driving electrodes, which are adjacent to each other, for each horizontal time, a speed of the second scan driving is higher than that of the first scan driving, and when a common driving electrode which is an object of the first scan driving and one of two or more common driving electrodes which are objects of the second scan driving are overlapped,
the scan driving unit applies the display driving signal to the overlapped common driving electrode without applying the touch detection driving signal, andthe scan driving unit performs the second scan driving to common driving electrodes other than the overlapped common driving electrode among the two or more common driving electrodes which are objects of the second scan driving by applying the DC potential in the pixel signal application time interval and applying the AC signal in the time interval other than the pixel signal application time interval. |
