Display device, detection device, and watch

Patent metadata

Field	Value
Publication number	US-12355438-B2
Application number	US-202318112465-A
Country	US
Kind code	B2
Filing date	Feb 21, 2023
Priority date	Aug 20, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

According to one embodiment, a display device includes a display area, a first sensor electrode, a second sensor electrode and a detector. The display area displays an image. The first sensor electrode is disposed in a peripheral area surrounding the display area. The second sensor electrode is disposed in the peripheral area and disposed adjacent to the first sensor electrode. The detector is electrically connected to the first sensor electrode and the second sensor electrode. The first sensor electrode and the second sensor electrode both have a body portion and a comb tooth portion having a plurality of linear electrodes. A comb tooth portion of the first sensor electrode and a comb tooth portion of the second sensor electrode are disposed at mutually different locations.

First claim

What is claimed is:

1. A display device comprising:
a display area that displays an image;
a first sensor electrode disposed in a peripheral area surrounding the display area;
a second sensor electrode disposed in the peripheral area and disposed adjacent to the first sensor electrode; and
a detector electrically connected to the first sensor electrode and the second sensor electrode, wherein
the first sensor electrode and the second sensor electrode both have a body portion and a comb tooth portion having a plurality of linear electrodes, and
a comb tooth portion of the first sensor electrode and a comb tooth portion of the second sensor electrode are disposed at mutually different locations.

2. The display device of claim 1 , wherein
a body portion of the first sensor electrode is disposed in a first region of the peripheral area,
a body portion of the second sensor electrode is disposed in a second region of the peripheral area,
the comb tooth portion of the first sensor electrode and the comb tooth portion of the second sensor electrode are disposed in a third region of the peripheral area, and
areas of the first region, the second region, and the third region are equal.

3. The display device of claim 1 , wherein
the first sensor electrode and the second sensor electrode both have the body portion and the comb tooth portion connected by a wire portion.

4. The display device of claim 1 , wherein
the first sensor electrode and the second sensor electrode both have an opening portion in the body portion.

5. The display device of claim 1 , further comprising:
a common electrode disposed on the display area; and
a plurality of pixel electrodes disposed on the display area and disposed to be opposed to the common electrode, wherein
the first sensor electrode and the second sensor electrode are disposed in a same layer as the common electrode.

6. The display device of claim 1 , further comprising:
a common electrode disposed on the display area; and
a plurality of pixel electrodes disposed on the display area and disposed to be opposed to the common electrode, wherein
the first sensor electrode and the second sensor electrode are disposed in a same layer as the pixel electrodes.

7. The display device of claim 1 , wherein
all the body portions and the comb tooth portions of the first sensor electrode and the second sensor electrode are disposed along an outer periphery of the display area formed in a curved shape.

8. The display device of claim 2 , wherein
the detector
determines that an external proximity object approaches or comes into contact with the first region when a signal from the first sensor electrode is larger than a signal from the second sensor electrode by a predetermined range or more,
determines that the external proximity object approaches or comes into contact with the second region when the signal from the second sensor electrode is larger than the signal from the first sensor electrode by a predetermined range or more, and
determines that the external proximity object approaches or comes into contact with the third region when a difference between the signal from the first sensor electrode and the signal from the second sensor electrode falls within a predetermined range.

9. A watch comprising the display device of claim 1 .

10. A display device comprising:
a display area that displays an image;
a first sensor electrode disposed in a peripheral area surrounding the display area;
a second sensor electrode disposed in the peripheral area and disposed adjacent to the first sensor electrode; and
a detector electrically connected to the first sensor electrode and the second sensor electrode, wherein
the first sensor electrode and the second sensor electrode both have a body portion and a tapered portion,
a tapered portion of the first sensor electrode and a tapered portion of the second sensor electrode are disposed to face each other, and
all the body portions and the tapered portions of the first sensor electrode and the second sensor electrode are disposed along an outer periphery of the display area formed in a curved shape.

11. The display device of claim 10 , wherein
the body portion of the first sensor electrode is disposed in a first region of the peripheral area,
the body portion of the second sensor electrode is disposed in a second region of the peripheral area,
the tapered portion of the first sensor electrode and the tapered portion of the second sensor electrode are disposed in a third region of the peripheral area, and
areas of the first region, the second region, and the third region are equal.

12. A watch comprising the display device of claim 10 .

13. A detection device comprising:
a first sensor electrode;
a second sensor electrode disposed adjacent to the first sensor electrode; and
a detector electrically connected to the first sensor electrode and the second sensor electrode, wherein
the first sensor electrode and the second sensor electrode both have a body portion and a comb tooth portion having a plurality of linear electrodes,
a comb tooth portion of the first sensor electrode and a comb tooth portion of the second sensor electrode are disposed at mutually different locations,
a body portion of the first sensor electrode is disposed in a first region,
a body portion of the second sensor electrode is disposed in a second region different from the first region,
the comb tooth portion of the first sensor electrode and the comb tooth portion of the second sensor electrode are disposed in a third region, which is different from the first region and the second region, and
areas of the first region, the second region, and the third region are equal.

14. The detection device of claim 13 , wherein
the first sensor electrode and the second sensor electrode both have the body portion and the comb tooth portion connected by a wire portion.

15. The detection device of claim 13 , wherein
the first sensor electrode and the second sensor electrode both have an opening portion in the body portion.

16. The detection device of claim 13 , wherein
all the body portions and the comb tooth portions of the first sensor electrode and the second sensor electrode are disposed in a curved shape.

17. A watch comprising the detection device of claim 13 .

Assignees

• Japan Display Inc

Inventors

• Fujisawa Akihiko
• Ito Kaoru
• Abe Daichi

Classifications

• H03K2017/9613

  using two electrodes per touch switch · CPC title

• G06F3/04883

  for inputting data by handwriting, e.g. gesture or text · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F3/038

  Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry · CPC title