Display device
A display device is provided and includes display unit comprising common electrodes two dimensionally arrayed on substrate, drive signal lines configured to transmit drive signals for touch detection to common electrodes, and switch circuit comprising transistors connected to drive signal lines to select at least one common electrode; flexible substrate connected to substrate; pads at connections of flexible substrate and substrate; and touch detection circuit configured to transmit drive signals to common electrodes, wherein: transistors comprises: first transistor connected to first electrode of common electrodes via first wiring of first length; and second transistor connected to second electrode of common electrodes via second wiring of second length; channel width of first transistor is narrower than channel width of second transistor; drive signal lines are respectively connected to pads separated at two or more positions.
1. A display device comprising:
a display unit comprising common electrodes two dimensionally arrayed on a substrate, drive signal lines configured to respectively transmit drive signals for touch detection to the common electrodes, and a switch circuit, the switch circuit comprising transistors respectively connected to the drive signal lines to select at least one of the common electrodes;
a flexible substrate connected to the substrate;
pads at connections of the flexible substrate and the substrate; and
a touch detection circuit configured to respectively transmit the drive signals to the common electrodes, wherein:
the transistors comprises:
a first transistor connected to a first electrode of the common electrodes via a first wiring of a first length; and
a second transistor connected to a second electrode of the common electrodes via a second wiring of a second length;
a channel width of the first transistor is narrower than a channel width of the second transistor;
the drive signal lines are respectively connected to the pads; and
the pads are separated at two or more positions.
2. The display device of claim 1 , wherein
the touch detection circuit comprises detectors;
the detectors are connected to the common electrodes; and
the common electrodes are arranged in rows, columns, or rows and columns.
3. The display device of claim 1 , further comprising:
pixel electrodes facing the common electrodes; and
video signal lines configured to transmit a video signal to the pixel electrodes, and wherein
the video signal lines are formed at two regions; and
the pads are formed a first region between the two regions and second and third regions outside the two regions.
4. The display device of claim 3 , wherein:
the substrate comprises a first wiring layer and a second wiring layer connected to the first wiring layer;
the first wiring layer and the second wiring layer are in different layers; and
a part of the video signal lines are formed by the first wiring layer and the second wiring layer.
5. The display device of claim 4 , wherein:
a part of the first wiring layer overlaps a part of the second wiring layer.