Display panel with touch detection function, method of driving the same, driving circuit, and electronic unit
There are provide a display panel with a touch detection function, in which display operation is less affected by touch detection operation, a method of driving the display panel with a touch detection function, a driving circuit, and an electronic unit having the display panel with a touch detection function. The display panel with a touch detection function includes: one or more display elements; one or more drive electrodes; one or more touch detection electrodes; and a drive section selectively applying a DC drive signal or an AC drive signal to the drive electrodes.
1. A display panel with a touch detection function comprising:
one or more display elements;
one or more pixel electrodes;
one or more common electrodes;
a drive section selectively applying a DC drive signal or an AC drive signal to the common electrodes;
wherein the drive section applies the DC drive signal to the common electrodes in order to perform a write operation on the display elements for display during a write period, the AC drive signal has a pulse waveform that transitions from a first voltage to a second voltage corresponding to a DC voltage level of the DC drive signal, and the drive section applies the AC drive signal to the common electrodes in order to perform a touch detection drive in a period other than the write period.
2. The display panel according to claim 1 ,
wherein the common electrodes are formed to extend in a predetermined direction, the drive section sequentially selects one or more common electrodes among the common electrodes as a drive object electrode, and drives the drive object electrode for touch detection while applying the DC drive signal to common electrodes other than the drive object electrode, and the touch detection section detects a touch event based on signals output from the drive object electrodes.
3. The display panel according to claim 1 ,
wherein the display element includes:
a liquid crystal layer between a pixel electrode and a common electrode.
4. An electronic unit comprising:
a display panel with a touch detection function; and
a control section controlling operation using the display panel with a touch detection function,
wherein the display panel with a touch detection function includes:
one or more display elements;
one or more pixel electrodes;
one or more drive electrodes;
a drive section selectively applying a DC drive signal or an AC drive signal to the drive electrodes;
wherein the drive section applies the DC drive signal to the drive electrodes in order to perform a write operation on the display elements for display during a write period, the AC drive signal has a pulse waveform that transitions from a first voltage to a second voltage, and the drive section applies the AC drive signal to the drive electrodes in order to perform a touch detection drive in a period other than the write period.
5. The display panel according to claim 1 , further comprising:
a switch element to apply the DC drive signal to the common electrode in the write period, and to apply the AC drive signal to the common electrode other than the write period.
6. The electronic unit according to claim 4 , further comprising:
a switch element to apply the DC drive signal to the drive electrode in the write period, and to apply the AC drive signal to be applied to the drive electrode other than the write period.
7. The display panel according to claim 3 , further comprising:
a switch groups each includes a first switch coupled between a red sub pixel and a first output of a source driver, a second switch coupled between a green sub pixel and the first output of the source driver, and a third switch coupled between a green sub pixel and the first output of the source driver.
8. The display panel according to claim 6 , further comprising:
a switch groups each includes a first switch coupled between a red sub pixel and a first output of a source driver, a second switch coupled between a green sub pixel and the first output of the source driver, and a third switch coupled between a green sub pixel and the first output of the source driver.