IP Library › Granted Patent US 11,650,703

Granted Patent B2

US 11,650,703 · App. 15/930,717 · Granted May 16, 2023

Display device and touch detection device

Inventors: Takaaki Kono (Tokyo, JP); Yoshio Owaki (Tokyo, JP); Makoto Hayashi (Tokyo, JP); Hiroyuki Miyake (Tokyo, JP)

Assignee: Japan Display Inc.

G06F3/0445 G06F3/0416 G06F3/0448 G06F2203/0382 G06F2203/04101 G06F2203/04108

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Quick Facts

Patent No.: US 11,650,703
App. No.: 15/930,717
Granted: May 16, 2023
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

An object of the present invention is to provide a technique for providing a detection function of detecting that an external approaching object approaches a sensor region of a touch sensor, without increasing an area of the touch sensor and making a circuit complex. According to an aspect, a display device includes a first detection electrode that detects a position of an external approaching object within a detection surface, and plural second detection electrodes that detect that the external approaching object approaches the detection surface. The second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction. The second detection electrodes overlap the first detection electrode in a plan view.

Claims (69)

1. A display device comprising:

a first detection electrode that detects a position of an external approaching object within a detection surface; and

a plurality of second detection electrodes that detect that the external approaching object approaches the detection surface,

wherein the second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction,

the second detection electrodes overlap the first detection electrode in a plan view, and

the second detection electrodes are driven with same amplitude as driving electrodes in first touch detection using the first detection electrode,

wherein touch detection is performed by the first detection electrode only after the external approaching object is detected by the second detection electrodes, and

wherein the first detection electrode has a pad portion and a connection line portion thinner than the pad portion, and the connection line portion of the first touch detection electrode overlaps with the second touch detection electrode, and the second touch detection electrode is narrower than the pad portion of the first detection electrode, and the second touch detection electrode is wider than the connection line portion of the first detection electrode, and the second touch detection electrode overlaps both the connection line portion and the pad portion of the first touch detection electrode.

2. The display device according to claim 1 ,

wherein the first detection electrode includes a plurality of driving electrodes and a plurality of detection electrodes, and

areas of portions included in the second detection electrodes and overlapping the detection electrodes are larger than areas of portions included in the second detection electrodes and overlapping the driving electrodes.

3. The display device according to claim 2 , wherein the driving electrodes, the detection electrodes, and the second detection electrodes are arranged in the order of the plurality of detection electrodes, the plurality of driving electrodes, and the plurality of second detection electrodes from the detection surface in a cross-sectional view.

4. The display device according to claim 1 , wherein the plurality of second detection electrodes are floated in first touch detection using the first detection electrode.

5. The display device according to claim 4 , wherein the plurality of driving electrodes and the plurality of detection electrodes are floated in second touch detection using the plurality of second detection electrodes.

6. The display device according to claim 1 ,

wherein each of the plurality of driving electrodes and the plurality of detection electrodes has a structure in which corners of a plurality of squares are joined to each other, and

the plurality of driving electrodes partially overlap the plurality of detection electrodes in the plan view.

7. The display device according to claim 6 ,

wherein the plurality of second detection electrodes have a stripe-shaped electrode structure, and

the stripe-shaped electrodes overlap the corners of the plurality of squares.

8. A display device comprising:

a first detection electrode that detects a position of an external approaching object within a detection surface; and

a plurality of second detection electrodes that detect that the external approaching object approaches the detection surface,

wherein the second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction,

the second detection electrodes overlap the first detection electrode in a plan view,

the first detection electrode includes a plurality of driving electrodes and a plurality of detection electrodes,

the areas of portions included in the second detection electrodes and overlapping the driving electrodes are larger than the areas of portions included in the second detection electrodes and overlapping the detection electrodes,

the driving electrodes, the detection electrodes, and the second detection electrodes are arranged in the order of the driving electrodes, the detection electrodes, and the second detection electrodes from the detection surface in a cross-sectional view, and

the second detection electrodes are driven with same amplitude as the driving electrodes in first touch detection using the first detection electrode,

wherein touch detection is performed by the first detection electrode only after the external approaching object is detected by the second detection electrodes, and

9. A touch detection device comprising:

a first detection electrode that detects a position of an external approaching object within a detection surface; and

a plurality of second detection electrodes that detect that the external approaching object approaches the detection surface,

wherein the second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction,

each of the second detection electrodes overlaps the first detection electrode in a plan view, and

the second detection electrodes are driven with same amplitude as driving electrodes in first touch detection using the first detection electrode,

wherein touch detection is performed by the first detection electrode only after the external approaching object is detected by the second detection electrodes, and

10. The touch detection device according to claim 9 ,

wherein the first detection electrode includes a plurality of driving electrodes and a plurality of detection electrodes, and

11. The touch detection device according to claim 10 , wherein the plurality of driving electrodes, the plurality of detection electrodes, and the plurality of second detection electrodes are arranged in the order of the detection electrodes, the driving electrodes, and the second detection electrodes from the detection surface in a cross-sectional view.

12. The touch detection device according to claim 9 , wherein the plurality of second detection electrodes are floated in first touch detection using the first detection electrode.

13. The touch detection device according to claim 12 , wherein the plurality of driving electrodes and the plurality of detection electrodes are floated in second touch detection using the plurality of second detection electrodes.

14. The touch detection device according to claim 9 , wherein each of the plurality of driving electrodes and the plurality of detection electrodes has a structure in which corners of a plurality of squares are joined to each other in the plan view.

15. The touch detection device according to claim 14 ,

wherein the plurality of second detection electrodes have a stripe-shaped electrode structure, and

the stripe-shaped electrodes overlap the corners of the squares.

16. A touch detection device comprising:

a first detection electrode that detects a position of an external approaching object within a detection surface; and

a plurality of second detection electrodes that detect that the external approaching object approaches the detection surface,

wherein the second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction,

each of the second detection electrodes overlaps the first detection electrode in a plan view,

the first detection electrode includes a plurality of driving electrodes and a plurality of detection electrodes,

areas of portions included in the second detection electrodes and overlapping the driving electrodes are larger than area of portions included in the second detection electrodes and overlapping the detection electrodes,

the second detection electrodes are driven with the same amplitude as the driving electrodes in first touch detection using the first detection electrode,

wherein touch detection is performed by the first detection electrode only after the external approaching object is detected by the second detection electrodes, and

17. A display device comprising:

a plurality of first detection electrodes that detect a position of an external approaching object within a detection surface; and

a plurality of second detection electrodes that detect that the external approaching object approaches the detection surface,

wherein the second detection electrodes extend in a second direction and are arranged in a first direction intersecting the second direction,

the second detection electrodes overlap the first detection electrode in a plan view,

the plurality of second detection electrodes are floated in first touch detection using the first detection electrode, and

the plurality of first detection electrodes are floated in second touch detection using the plurality of second detection electrodes,

wherein touch detection is performed by the first detection electrode only after the external approaching object is detected by the second detection electrodes, and

Assignments (2)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2025

From: JAPAN DISPLAY INC.

To: MAGNOLIA WHITE CORPORATION

Reel/Frame 072130/0313 →

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 6, 2020

From: KONO, TAKAAKI; OWAKI, YOSHIO; HAYASHI, MAKOTO; MIYAKE, HIROYUKI

To: JAPAN DISPLAY INC.

Reel/Frame 053127/0672 →