Display device with touch detection function and electronic apparatus

• US 10,303,320 B2
• Filed: 08/08/2018
• Issued: 05/28/2019
• 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 A
• Application Number:
  US16/058,565
• Publication Number:
  US 20180348915A1
• Time in Patent Office: 293 Days
• 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 device, comprising:

a plurality of display elements that are defined and surrounded by a plurality of scan lines each extending in a first direction and a plurality of signal lines each extending in a second direction, the plurality of display elements including a red display element, a green display element, and a blue display element;

a plurality of touch detection electrodes opposed to the plurality of display elements;

a plurality of metal wires disposed on the touch detection electrodes, each of the metal wires extending along the plurality of signal lines and being disposed between the display elements adjacent to each other, wherein

the metal wires are divided into metal wire parts that are arranged in the second direction in which each of the metal wires extends, and

the metal wire parts, each being longitudinal in the second direction, are disposed without crossing each other and spaced from each other in the second direction.

2. The display device with a touch detection device according to claim 1, wherein the touch detection electrodes are arranged in a same layer.

3. The display device with a touch detection device according to claim 1, wherein

a pitch between the metal wires adjacent to each other in the first direction is integer multiple of a pitch between the mutually adjacent display elements.

4. The display device with a touch detection device according to claim 1, wherein:

the plurality of touch detection electrodes are coupled to a touch detection circuit to detect an external approaching object.

5. The display device with a touch detection device according to claim 1, further comprising:

a plurality of dummy electrodes that are electrically floating and disposed between the touch detection electrodes adjacent to each other,

wherein each of the dummy electrodes includes at least one metal wire that is disposed on each of the touch detection electrodes between the display elements adjacent to each other, the dummy electrodes each extending along the plurality of signal lines.

6. The display device with a touch detection device according to claim 2, wherein

the touch detection electrodes and the dummy electrodes are disposed on a same layer.

7. The display device with a touch detection device according to claim 1, wherein

the touch detection electrodes are transparent electrodes.

8. The display device with a touch detection device according to claim 5, wherein

the dummy electrodes and the touch detection electrodes are transparent electrodes.

9. The display device with a touch detection device according to claim 1, wherein

the metal wire parts of one of the metal wires are disposed without overlapping both of the signal lines that are adjacent to the one of the metal wires in the first direction.