Display device with touch detecting function and electronic apparatus

• US 9,170,696 B2
• Filed: 03/19/2014
• Issued: 10/27/2015
• Est. Priority Date: 03/27/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Ishizaki, Koji, Kurasawa, Hayato, Koito, Takeo
• Primary Examiner(s): HALEY, JOSEPH R
• Application Number:
  US14/219,212
• Publication Number:
  US 20140320760A1
• Time in Patent Office: 587 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• 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 3/0416 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 3/044 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 3/047 using sets of wires, e.g. crossed wires

Abstract

According to an aspect, a display device with a touch detecting function includes: a display area in which pixels each composed of a plurality of color areas are arranged in a matrix; a touch detection electrode including a first conductive thin wire extending in a first direction; and a dummy electrode including a plurality of second conductive thin wires; a drive electrode having capacitance for the touch detection electrode. Each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces. A color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.

Claims

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

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area, wherein

each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces, and

a color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps, and the color of the color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in the first direction overlaps.

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

the second conductive thin wires are provided parallel to the first direction,

each of the second conductive thin wires comprises:

a first thin wire piece arranged at a first arrangement pitch in the second direction; and

a second thin wire piece arranged at a second arrangement pitch different from the first arrangement pitch in the second direction, and

the first thin wire piece and the second thin wire piece are separated by the slit.

3. The display device with a touch detecting function according to claim 2, wherein the first thin wire piece is as long as the second thin wire piece in the first direction.

4. The display device with a touch detecting function according to claim 2, wherein the first conductive thin wire is provided in plurality parallel to a pixel array direction, in which the pixels are arranged, and is arranged such that an arrangement pitch between first conductive thin wires adjacent to each other partially includes the first arrangement pitch and the second arrangement pitch.

5. The display device with a touch detecting function according to claim 1, wherein each of the second conductive thin wires includes the thin wire pieces in a linear shape having a first end and a second end, includes a bent portion where the second end of one thin wire piece of thin wire pieces adjacent to each other and the first end of the other thin wire piece of the two thin wire pieces are connected, and is arranged such that the one thin wire piece extends at an angle with respect to the first direction and the other thin wire piece extends in a direction different from the direction of the one thin wire piece in a manner changing the angle with respect to the first direction at the bent portion.

6. The display device with a touch detecting function according to claim 5, wherein, when the angle with respect to the first direction at the bent portion is a first angle, an angle with respect to the first direction at a bent portion closest to the bent portion in the first direction is a second angle different from the first angle.

7. The display device with a touch detecting function according to claim 1, wherein the first conductive thin wire has a mesh shape including an intersection, and each of the second conductive thin wires has the slit at a portion corresponding to the intersection.

8. A display device with a touch detecting function comprising:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area, wherein the second conductive thin wires are provided parallel to a pixel array direction, in which the pixels are arranged,

each of the second conductive thin wires comprises;

a first thin wire piece having a portion extending in a direction different from the first direction and arranged at a first arrangement pitch in a second direction orthogonal to the first direction; and

a second thin wire piece having a portion extending in a direction different from the first direction, being as long as the first thin wire piece in the first direction, and arranged at a second arrangement pitch different from the first arrangement pitch in the second direction, and

the first thin wire piece and the second thin wire piece are arranged so as not to overlap with each other in the first direction, and an end of the first thin wire piece and an end of the second thin wire piece are arranged in the second direction and do not overlap with each other, thereby forming a slit to divide the second conductive thin wire.

9. An electronic apparatus comprising a display device with a touch detecting function, wherein

the display device with a touch detecting function comprises:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area,

each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces, and

a color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps, and the color of the color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in the first direction overlaps.

10. An electronic apparatus comprising a display device with a touch detecting function, wherein

the display device with a touch detecting function comprises:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix in a first direction on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area,

the second conductive thin wires are provided parallel to a pixel array direction, in which the pixels are arranged,

each of the second conductive thin wires comprises;

a first thin wire piece having a portion extending in a direction different from the first direction and arranged at a first arrangement pitch in a second direction orthogonal to the first direction; and

a second thin wire piece having a portion extending in a direction different from the first direction, being as long as the first thin wire piece in the first direction, and arranged at a second arrangement pitch different from the first arrangement pitch in the second direction, and

the first thin wire piece and the second thin wire piece are arranged so as not to overlap with each other in the first direction, and an end of the first thin wire piece and an end of the second thin wire piece are arranged in the second direction and do not overlap with each other, thereby forming a slit to divide the second conductive thin wire.

11. A display device with a touch detecting function comprising:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area, wherein

each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces,

the second conductive thin wires are provided parallel to the first direction,

each of the second conductive thin wires comprises a first thin wire piece arranged at a first arrangement pitch in the second direction, and a second thin wire piece arranged at a second arrangement pitch different from the first arrangement pitch in the second direction,

the first thin wire piece and the second thin wire piece are separated by the slit, and

a color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.

12. The display device with a touch detecting function according to claim 11, wherein the first thin wire piece is as long as the second thin wire piece in the first direction.

13. The display device with a touch detecting function according to claim 11, wherein the first conductive thin wire is provided in plurality parallel to a pixel array direction, in which the pixels are arranged, and is arranged such that an arrangement pitch between first conductive thin wires adjacent to each other partially includes the first arrangement pitch and the second arrangement pitch.

14. A display device with a touch detecting function comprising:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area, wherein

each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces,

each of the second conductive thin wires includes the thin wire pieces in a linear shape having a first end and a second end, includes a bent portion where the second end of one thin wire piece of thin wire pieces adjacent to each other and the first end of the other thin wire piece of the two thin wire pieces are connected, and is arranged such that the one thin wire piece extends at an angle with respect to the first direction and the other thin wire piece extends in a direction different from the direction of the one thin wire piece in a manner changing the angle with respect to the first direction at the bent portion, and

a color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.

15. The display device with a touch detecting function according to claim 14, wherein, when the angle with respect to the first direction at the bent portion is a first angle, an angle with respect to the first direction at a bent portion closest to the bent portion in the first direction is a second angle different from the first angle.

16. A display device with a touch detecting function comprising:

a substrate;

a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate;

a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate;

a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires;

a drive electrode having capacitance for the touch detection electrode; and

a display functional layer having a function to display an image on the display area, wherein

each of the second conductive thin wires includes a plurality of thin wire pieces extending in a direction different from the first direction and is divided by a slit between the thin wire pieces,

the first conductive thin wire has a mesh shape including an intersection, and each of the second conductive thin wires has the slit at a portion corresponding to the intersection, and

a color area in the display area with which the slit overlaps has a different color from a color area in the display area with which a slit closest to the slit in a second direction orthogonal to the first direction overlaps.