Display device with touch detection function and electronic apparatus

• US 9,304,639 B2
• Filed: 11/18/2013
• Issued: 04/05/2016
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Ishizaki, Koji, Kurasawa, Hayato, Azumi, Kohei
• Primary Examiner(s): Boyd, Jonathan
• Application Number:
  US14/082,826
• Publication Number:
  US 20140152613A1
• Time in Patent Office: 869 Days
• Field of Search: 345/174
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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 3/04166 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 3/0445 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

Abstract

According to an aspect, a display device with a touch detection function includes: a substrate; a drive electrode that extends in a first direction; and a plurality of touch detection electrodes that are metal wirings extending in a second direction different from the first direction. The metal wirings are arranged with a predetermined pitch so as to make capacitive coupling with the drive electrode.

Claims

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

a substrate;

a plurality of pixel electrodes that are arranged in a matrix on a plane parallel to a surface of the substrate;

a plurality of signal lines that extend in a first direction on a plane parallel to the surface of the substrate and supply pixel signals used for displaying an image to the pixel electrodes;

a display functional layer that performs an image displaying function based on the pixel signals;

a drive electrode that faces the plurality of the pixel electrodes in a vertical direction with respect to the surface of the substrate, a longitudinal direction of the drive electrodes extending in the first direction;

a plurality of touch detection electrodes that are metal wirings facing the drive electrode in the vertical direction and that extend in a second direction different from the first direction, the metal wirings being arranged with a predetermined pitch so as to make capacitive coupling with the drive electrode;

a color filter that faces the display functional layer in the vertical direction and has a plurality of color areas including at least one of a red area, a green area, and a blue area; and

a plurality of pixels that each includes the red area, the green area, and the blue area, and that has an edge portion including first edge portions extending in the first direction and second edge portions extending in the second direction,

wherein each of the touch detection electrodes includes a plurality of bending portions at regular intervals, and

wherein the second edge portions of the pixels are overlapped by each of the touch detection electrodes except in each of the bending portions.

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

wherein an extending direction of each color area of the color filter is the first direction, and

the plurality of touch detection electrodes cross over each color area of the color filter.

3. The display device with a touch detection function according to claim 1, wherein the metal wirings are arranged at intervals of a natural number multiple of a pitch of pixels of the display functional layer.

4. The display device with a touch detection function according to claim 1, wherein the touch detection electrode is configured to detect an external proximity object by using a change in electrostatic capacitance that is caused by proximity or contact of the external proximity object.

5. The display device with a touch detection function according to claim 1, further comprising a scanning drive unit that applies a display drive signal to the drive electrode in a display operation period and applies a touch drive signal to the drive electrode in a touch detection operation period.

6. The display device with a touch detection function according to claim 1, wherein the touch detection electrodes are formed at an angle that is more than zero and less than 90 degrees with respect to the first direction.

7. An electronic apparatus including a display device with a touch detection function capable of detecting an external proximity object, the display device with a touch detection function comprising:

a substrate;

a plurality of pixel electrodes that are arranged in a matrix on a plane parallel to a surface of the substrate;

a plurality of signal lines that extend in a first direction on a plane parallel to the surface of the substrate and supply pixel signals used for displaying an image to the pixel electrodes;

a display functional layer that performs an image displaying function based on the pixel signals;

a drive electrode that faces the plurality of the pixel electrodes in a vertical direction with respect to the surface of the substrate, a longitudinal direction of the drive electrodes extending in the first direction

a plurality of touch detection electrodes that are metal wirings facing the drive electrode in the vertical direction and that extend in a second direction different from the first direction, the metal wirings being arranged with a predetermined pitch so as to make capacitive coupling with the drive electrode;

a color filter that faces the display functional layer in the vertical direction and has a plurality of color areas including at least one of a red area, a green area, and a blue area; and

a plurality of pixels that each includes the red area, the green area, and the blue area, and that has an edge portion including first edge portions extending in the first direction and second edge portions extending in the second direction,

wherein each of the touch detection electrodes includes a plurality of bending portions at regular intervals, and

wherein the second edge portions of the pixels are overlapped by each of the touch detection electrodes except in each of the bending portions.

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

a substrate;

a plurality of pixel electrodes that are arranged in a matrix on a plane parallel to a surface of the substrate;

a plurality of signal lines that extend in a first direction on a plane parallel to the surface of the substrate and supply pixel signals used for displaying an image to the pixel electrodes;

a display functional layer that performs an image displaying function based on the pixel signals;

a plurality of touch detection electrodes that are metal wirings and that extend in a second direction different from the first direction, the metal wirings being arranged with a predetermined pitch;

a color filter that faces the display functional layer in the vertical direction and has a plurality of color areas including at least one of a red area, a green area, and a blue area; and

a plurality of pixels that each has the red area, the green area, and the blue area and that has an edge portion including first edge portions extending in the first direction and second edge portions extending in the second direction,

wherein each of the touch detection electrodes includes a plurality of bending portions at regular intervals, and

wherein the second edge portions of the pixels are overlapped by each of the touch detection electrodes except in each of the bending portions.