Patent ID: 11893176
Assignee: JAPAN DISPLAY INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A display device with a touch detection function, comprising:
a display area where a plurality of electrodes are arranged in a matrix having a first direction and a second direction crossing the first direction above a substrate;
common electrodes provided so as to face the pixel electrodes;
a plurality of pixel signal lines each coupled to the pixel electrodes, the pixel signal lines each extending in the first direction;
a control device for performing image display control by applying a display drive voltage between the pixel electrodes and the common electrodes, the control device including
a drive signal generator for generating the display drive voltage and a touch drive signal, and
a source driver that is a circuit for supplying a pixel signal to each of the pixel electrodes, the source driver being coupled to the pixel signal lines;

a single first wire extending in the first direction and arranged in a frame area positioned outside the display area; and
a plurality of selection switches for selecting the common electrodes to be coupled to the single first wire based on a selection signal of the control device, the selection signal being a signal for identifying a period during which the drive signal is supplied to the common electrodes from the drive signal generator through the single first wire,
wherein the drive signal generator includes
a first voltage generator for generating a first voltage,
a second voltage generator for generating a second voltage lower than the first voltage, and
a switching circuit for switching between the first voltage and the second voltage to output to the single first wire,

wherein
the selection switches each coupled to the single first wire via a first coupling conductor and coupled to the common electrode via a second coupling conductor are arranged in the frame area along the single first wire, and are overlapped by the single first wire, and
wherein the single first wire is supplied with:
the second voltage as the display drive voltage supplied from and output of the drive signal generator; and
the first voltage and the second voltage as the touch drive signal supplied from the output of the drive signal generator.