Display device and method of driving display device
AssigneeJapan Display Inc.
InventorsRyutaro NITOBE, Yoshihiro KOTANI
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Abstract
According to one embodiment, a display device comprises a common electrode driver configured to supply to common electrodes a display voltage during a display period and a touch detection drive signal during a touch detection period, a source amplifier configured to supply an image signal to source lines, a gate driver configured to supply to gate lines a scanning signal during a display period and a guard signal during a touch detection period, and switches configured to connect the source lines and the common electrodes during a touch detection period.
Claims13
A display device comprising:
- a pixel array comprising pixels two dimensionally arranged in rows and columns;
- common electrodes over the pixel array for capacitance type touch detection;
- a common electrode driver configured to supply a voltage for display to the common electrodes during a display period and a drive signal for touch detection to the common electrodes during a touch detection period;
- source lines connected to the columns of the pixels in the pixel array;
- a source amplifier configured to supply an image signal to the source lines;
- gate lines connected to the rows of the pixels in the pixel array;
- a gate driver configured to successively supply a scanning signal to the gate lines during a display period, and supply a signal in the same phase as the drive signal to the gate lines during a touch detection period;
- and
- first switches connected between the source lines and the common electrodes and configured to connect the source lines and the common electrodes during a touch detection period.
A method of driving a display device comprising:
- a pixel array comprising pixels two dimensionally arranged in rows and columns;
- common electrodes over the pixel array for capacitance type touch detection;
- a common electrode driver connected to the common electrodes;
- source lines connected to the columns of the pixels in the pixel array;
- a source amplifier connected to the source lines;
- gate lines connected to the rows of the pixels in the pixel array;
- a gate driver connected to the gate lines;
- and
- switches connected between the source lines and the common electrodes, the method comprising:
- supplying, by the common electrode driver, a voltage for display to the common electrodes during a display period;
- supplying, by the common electrode driver, a drive signal for touch detection during a touch detection period;
- supplying, by the source amplifier, an image signal to the source lines;
- successively supplying, by the gate driver, a scanning signal to the respective gate lines during a display period;
- successively supplying, by the gate driver, a signal in the same phase as the drive signal to the gate lines during a touch detection period;
- and
- connecting, by the switch, the source lines and the common electrodes each other during a touch detection period.
Dependencies are inferred from the claim text.