Display device with touch detection function and electronic apparatus

• US 9,753,599 B2
• Filed: 08/26/2016
• Issued: 09/05/2017
• Est. Priority Date: 12/05/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kida, Yoshitoshi, Noguchi, Koji, Teranishi, Yasuyuki, Mizuhashi, Hiroshi, Azumi, Kohei
• Primary Examiner(s): OSORIO, RICARDO
• Application Number:
  US15/248,239
• Publication Number:
  US 20160364049A1
• Time in Patent Office: 375 Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

According to an aspect, a display device with a touch detection function includes a plurality of drive electrodes that face a plurality of pixel electrodes in an orthogonal direction to the surface of the substrate, and extend in a direction parallel to the direction in which a plurality of signal lines extend. The display device with a touch detection function also includes a scan driving unit that applies a touch drive signal to a signal line that faces, in an overlapping manner in the orthogonal direction, a drive electrode to which the touch drive signal is applied.

Claims

1. A display device with a touch detection function comprising:

a substrate;

a plurality of pixel electrodes that are provided to the substrate;

a plurality of signal lines configured to supply pixel signals;

a plurality of drive electrodes that face the pixel electrodes in an orthogonal direction to the surface of the substrate, each of the drive electrodes overlapping at least one of the signal lines in the orthogonal direction; and

a touch detection driving unit configured to apply a touch drive signal to;

at least one of the drive electrodes that are selected; and

a signal line that faces the at least one of the drive electrodes that are selected in an overlapping manner in the orthogonal direction.

2. The display device with a touch detection function according to claim 1, wherein

in a display operation period, the touch detection driving unit is configured to apply a display drive signal to the drive electrodes, and supplies the pixel signals to the signal lines, and

in a touch detection operation period, the touch detection driving unit is configured to apply the touch drive signal to:

the at least one of the drive electrodes that are selected; and

the signal line that faces the at least one of the drive electrodes that are selected in an overlapping manner in the orthogonal direction.

3. The display device with a touch detection function according to claim 2, further comprising:

a plurality of metal auxiliary wirings that are arranged for respective gaps between the adjacent drive electrodes, each of the metal auxiliary wirings being arranged between a corresponding gap among the gaps and a corresponding signal line among the signal lines when viewed in the orthogonal direction, wherein

the touch detection driving unit is configured to apply the touch drive signal to;

a metal auxiliary wiring facing in the orthogonal direction, the signal line to which the touch drive signal is applied, among the metal auxiliary wirings.

4. The display device with a touch detection function according to claim 2, further comprising a plurality of metal auxiliary wirings that are respectively stacked on the drive electrodes of transparent conductive material, each of the metal auxiliary wirings being arranged in a position facing a corresponding signal line among the signal lines when viewed in the orthogonal direction.

5. The display device with a touch detection function according to claim 1, further comprising:

a color filter colored into different regions of a red region, a green region, and a blue region corresponding to the pixel electrodes, wherein

a width of each of the drive electrodes corresponds to a width of a set of pixels including the red region, the green region, and the blue region.

6. The display device with a touch detection function according to claim 1, further comprising a color filter colored into different regions of at least a red region and a blue region each corresponding to the pixel electrodes,

wherein the drive electrodes are arranged such that a gap between the adjacent drive electrodes overlaps a gap between the red region and the blue region of the color filter.

7. The display device with a touch detection function according to claim 1, wherein a red region and a blue region of a color filter are arranged with a green region interposed therebetween, and a width of each of the red region and the blue region is smaller than a width of the green region of the color filter.

8. The display device with a touch detection function according to claim 1, further comprising a detection unit configured to detect a change in electrostatic capacitance.

9. The display device with a touch detection function according to claim 1,

wherein the touch detection driving unit is configured to apply a predetermined potential to at least one of the drive electrodes that are not selected and the signal line that faces, in an overlapping manner in the orthogonal direction, the at least one of the drive electrodes that are not selected.

10. The display device with a touch detection function according to claim 9,

wherein the signal line that faces, in an overlapping manner in the orthogonal direction, the at least one of the drive electrodes that are not selected is a signal line that does not overlap the at least one of the drive electrodes that are selected.

11. The display device with a touch detection function according to claim 1, wherein

a plurality of pixels face each of the drive electrodes, and

a signal line for a pixel that faces each of the drive electrodes is coupled to a drive signal selector unit.

12. The display device with a touch detection function according to claim 11, wherein

the drive signal selector unit includes a switch, and

one end of the switch is coupled to a pixel, and the other end thereof is coupled to common wirings.

13. The display device with a touch detection function according to claim 12,

wherein the common wirings are coupled to wirings configured to supply the touch drive signal via the switch.

14. The display device with a touch detection function according to claim 1, further comprising a color filter colored into different regions of at least a green region and a blue region each corresponding to the pixel electrodes,

wherein the drive electrodes are arranged such that a gap between the adjacent drive electrodes overlaps a gap between the green region and the blue region of the color filter.

15. The display device with a touch detection function according to claim 1,

wherein wirings configured to supply the touch drive signal are routed so as to surround a display region.

16. An electronic apparatus including a display device with a touch detection function, the display device comprising:

a substrate;

a plurality of pixel electrodes that are provided to the substrate;

a plurality of signal lines configured to supply pixel signals;

a plurality of drive electrodes that face the pixel electrodes in an orthogonal direction to the surface of the substrate, each of the drive electrodes overlapping at least one of the signal lines in the orthogonal direction; and

a touch detection driving unit configured to apply a touch drive signal to;

at least one of the drive electrodes that are selected; and

a signal line that faces the at least one of the drive electrodes that are selected in an overlapping manner in the orthogonal direction.

17. A display device with a touch detection function comprising:

a substrate;

a plurality of pixel electrodes provided to the substrate;

a plurality of signal lines configured to supply pixel signals;

a plurality of drive electrodes that face the pixel electrodes in an orthogonal direction to the surface of the substrate, each of the drive electrodes overlapping at least one of the signal lines in the orthogonal direction;

a plurality of metal auxiliary wirings that are routed between at least part of the signal lines and the drive electrodes; and

a touch detection driving unit configured to apply a touch drive signal to;

the drive electrodes; and

the metal auxiliary wirings that face the signal lines for pixels that face a drive electrode to be driven.