Display device with touch detecting function and electronic apparatus

• US 10,599,246 B2
• Filed: 02/28/2019
• Issued: 03/24/2020
• Est. Priority Date: 03/27/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Koito, Takeo, Ishizaki, Koji, Kurasawa, Hayato
• Primary Examiner(s): Polo, Gustavo
• Application Number:
  US16/289,158
• Publication Number:
  US 20190196637A1
• Time in Patent Office: 390 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

According to an aspect, a display device with a touch detecting function includes: a substrate; a display area; a touch detection electrode provided with a plurality of conductive thin wires, each of the conductive thin wires including a plurality of thin wire pieces each having a linear shape and including a first end and a second end; a drive electrode; and a display functional layer. The adjacent thin wire pieces are arranged so as to be bent at a bent portion serving as a portion at which the second end of the one thin wire piece of the adjacent thin wire pieces is connected to the first end of the other thin wire piece of the adjacent thin wire pieces, and the conductive thin wires include a bent portion having an angle formed by the adjacent thin wire pieces different from angles of the other bent portions.

Claims

1. A display device comprising:

a display panel,

a detection electrode arranged on the display panel and including wire pieces, the detection electrode including a first wire and a second wire,

wherein the first wire includes a first bent portion,

wherein the second wire includes a second bent portion,

wherein each of the first bent portion and the second bent portion is formed by two of the wire pieces and includes a first edge and a second edge,

wherein an angle of the first bent portion is different from an angle of the second bent portion,

wherein the first edge of the first bent portion and the first edge of the second bent portion are connected by a connecting portion,

wherein the second edge of the first bent portion and the second edge of the second bent portion are not connected each other,

wherein the detection electrode further includes a third wire,

wherein the third wire includes a third bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion, and

wherein the first wire and the third wire are connected by the connecting portion.

2. The display device according to claim 1,

wherein the connecting portion extends in a first direction, and the first bent portion and the second bent portion is apart from each other.

3. The display device according to claim 1,

wherein the first wire is arranged between the third wire and the second wire, and

wherein a distance between the first wire and the third wire is different from a distance between the first wire and the second wire.

4. The display device according to claim 3,

wherein the detection electrode further includes a fourth wire,

wherein the second wire is arranged between the first wire and the fourth wire, and

wherein a distance between the first wire and the second wire is different from a distance between the second wire and the fourth wire.

5. The display device according to claim 1,

wherein the detection electrode further includes a fourth wire,

wherein the fourth wire includes a fourth bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion, and

wherein the second wire and the fourth wire are connected by the connecting portion.

6. The display device according to claim 1,

wherein the first wire includes a third bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion.

7. The display device according to claim 1,

wherein a second part of the wire pieces is not connected to the first wire, the second wire, and the connecting portion, and

wherein the second part of the wire pieces is arranged between the first wire and the second wire.

8. The display device according to claim 1,

wherein the display panel includes a plurality of pixels, and

wherein the maximum length of one pixel in a pixel orthogonal direction orthogonal to a pixel array direction on a plane parallel to a surface of the display panel is a first unit length,

wherein the maximum length of one pixel in the pixel array direction is a second unit length,

wherein the wire pieces extend in a direction inclined at an angle with respect to the pixel array direction, and

wherein a tangent value of the angle

is larger than a value obtained by dividing the value of the first unit length by a value twice as large as the second unit length,

is smaller than a value obtained by dividing a value twice as large as the first unit length by the value of the second unit length, and

is different from a value obtained by dividing the value of the first unit length by the value of the second unit length.

9. The display device according to claim 1,

wherein the display panel includes a plurality of pixels, and

wherein the wire pieces extend in a direction inclined at an angle larger than 27 degrees and smaller than 45 degrees or at an angle larger than 45 degrees and smaller than 63 degrees with respect to a pixel array direction in which a color area having the highest human visibility among a plurality of color areas included in each of the pixels is aligned.

10. The display device according to claim 1,

wherein a difference between the angle of the first bent portion and the angle of the second bent portion is less than 15 degrees.

11. A display device comprising:

a display panel, and

a detection electrode arranged on the display panel and including wire pieces, the detection electrode including a first wire and a second wire,

wherein the first wire includes a first bent portion,

wherein the second wire includes a second bent portion,

wherein each of the first bent portion and the second bent portion is formed by two of the wire pieces,

wherein an angle of the first bent portion is different from an angle of the second bent portion,

wherein the first bent portion and the second bent portion are connected by a connecting portion extending a first direction,

wherein the first bent portion and the second bent portion are apart from each other in the first direction,

wherein the detection electrode further includes a third wire,

wherein the third wire includes a third bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion, and

wherein the first wire and the third wire are connected by the connecting portion.

12. The display device according to claim 11,

wherein the first bent portion is formed by a first wire piece and a second wire piece of the wire pieces,

wherein the second bent portion is formed by a third wire piece and a fourth wire piece of the wire pieces,

wherein the first wire piece of the first bent portion and the third wire piece of the second bent portion are connected by the connecting portion, and

wherein the second wire piece of the first bent portion and the fourth wire piece of the second bent portion are apart from each other in the first direction.

13. The display device according to claim 11,

wherein the first wire is arranged between the third wire and the second wire, and

wherein a distance between the first wire and the third wire is different from a distance between the first wire and the second wire.

14. The display device according to claim 11,

wherein the first wire includes a third bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion.

15. The display device according to claim 11,

wherein a second part of the wire pieces is not connected to the first wire, the second wire, and the connecting portion, and

wherein the second part of the wire pieces is arranged between the first wire and the second wire.

16. The display device according to claim 11,

wherein the display panel includes a plurality of pixels, and

wherein the maximum length of one pixel in a pixel orthogonal direction orthogonal to a pixel array direction on a plane parallel to a surface of the display panel is a first unit length,

wherein the maximum length of one pixel in the pixel array direction is a second unit length,

wherein the wire pieces extend in a direction inclined at an angle with respect to the pixel array direction, and

wherein a tangent value of the angle

is larger than a value obtained by dividing the value of the first unit length by a value twice as large as the second unit length,

is smaller than a value obtained by dividing a value twice as large as the first unit length by the value of the second unit length, and

is different from a value obtained by dividing the value of the first unit length by the value of the second unit length.

17. The display device according to claim 11,

wherein the display panel includes a plurality of pixels, and

wherein the wire pieces extend in a direction inclined at an angle larger than 27 degrees and smaller than 45 degrees or at an angle larger than 45 degrees and smaller than 63 degrees with respect to a pixel array direction in which a color area having the highest human visibility among a plurality of color areas included in each of the pixels is aligned.

18. The display device according to claim 11,

wherein a difference between the angle of the first bent portion and the angle of the second bent portion is less than 15 degrees.

19. A detection device comprising:

a detection electrode including wire pieces, the detection electrode including a first wire and a second wire,

wherein the first wire includes a first bent portion,

wherein the second wire includes a second bent portion,

wherein each of the first bent portion and the second bent portion is formed by two of the wire pieces and includes a first edge and a second edge,

wherein an angle of the first bent portion is different from an angle of the second bent portion,

wherein the first edge of the first bent portion and the first edge of the second bent portion are connected by a connecting portion,

wherein the second edge of the first bent portion and the second edge of the second bent portion are not connected each other,

wherein the detection electrode further includes a third wire,

wherein the third wire includes a third bent portion formed by two of the wire pieces, an angle of which is different from at least one of the angle of the first bent portion and the angle of the second bent portion, and

wherein the first wire and the third wire are connected by the connecting portion.