Sensor-equipped display device and sensor device

Patent metadata

Field	Value
Publication number	US-10585507-B2
Application number	US-201615363353-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	Nov 30, 2015
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

According to one embodiment, a sensor-equipped display device includes a display panel including a sensor drive electrode and a detection electrode opposed to the sensor drive electrode and a driver, wherein the detection electrode includes a first layer formed in a thin line shape, and a second layer on the first layer in a plan view of the display area, the second layer having a reflectivity lower than that of the first layer, the outer edge of a second lower surface of the second layer is shifted with respect to the outer edge of a first upper surface of the first layer in a plan view, and the outermost outer edge of the second layer is positioned outside the outermost outer edge of the first layer in a plan view.

First claim

What is claimed is:

1. A sensor-equipped display device comprising:
a display panel including a substrate, a sensor drive electrode disposed in a display area and a detection electrode opposed to the sensor drive electrode in the display area; and
a driver which supplies a sensor drive signal to the sensor drive electrode and reads a change in a detection signal, the sensor drive signal from the sensor drive electrode to be detected as the detection signal by the detection electrode, wherein
the detection electrode includes a first layer formed in a thin line shape, and a second layer formed on and in contact with the first layer, the second layer having a reflectivity lower than that of the first layer,
one of the first and second layers is between the substrate and the other of the first and second layers,
the first layer includes a first lower surface, a first upper surface opposed to the first lower surface and between the first lower surface and the second layer, and a first side surface intersecting with the first lower surface and the first upper surface,
the second layer includes a second lower surface formed on the first upper surface, and a second upper surface located at an opposite side of the first layer with respect to the second lower surface,
the first upper surface has a first outer edge and a second outer edge opposed to the first outer edge,
the second lower surface has a third outer edge and a fourth outer edge opposed to the third outer edge,
the third outer edge does not overlap the first and second outer edges,
the fourth outer edge does not overlap the first and second outer edges,
the first layer has a first outermost outer edge and a second outermost outer edge opposed to the first outermost outer edge,
the second layer has a third outermost outer edge and a fourth outermost outer edge opposed to the third outermost outer edge,
the third outermost outer edge is positioned outside the first outermost outer edge and located at an opposite side of the second outermost outer edge with respect to the first outermost outer edge, and
the fourth outermost outer edge is positioned outside the second outermost outer edge and located at an opposite side of the first outermost outer edge with respect to the second outermost outer edge.

2. The sensor-equipped display device of claim 1 , wherein the first lower surface and the first side surface form an angle of 90° or less.

3. The sensor-equipped display device of claim 1 , wherein the first lower surface and the first side surface form an obtuse angle.

4. The sensor-equipped display device of claim 1 , wherein each of the first layer and the second layer is a conductive layer.

5. The sensor-equipped display device of claim 4 , wherein an electrical resistance of the first layer is less than that of the second layer.

6. The sensor-equipped display device of claim 1 , wherein the first layer is a multilayer including at least a first thin film and a second thin film, and at least one of the first thin film and the second thin film is a metal film.

7. The sensor-equipped display device of claim 6 , wherein the first thin film is a metal film and the second thin film is a transparent conductive film.

8. The sensor-equipped display device of claim 1 , wherein the second layer is a reflection suppressive layer which suppresses reflection on the first upper surface.

9. The sensor-equipped display device of claim 8 , wherein the second layer is a multilayer including at least two thin films of different refractive indices.

10. The sensor-equipped display device of claim 8 , wherein the second layer is a color resin film.

11. The sensor-equipped display device of claim 1 , wherein the first lower surface on the display panel.

12. The sensor-equipped display device of claim 1 , further comprising an insulating film covering the detection electrode, wherein the second upper surface contacts the insulating film.

13. The sensor-equipped display device of claim 1 , further comprising a polarizer over the second layer.

14. A sensor device comprising a substrate and a detection electrode provided with the substrate, wherein
the detection electrode includes a first layer formed in a thin line shape, and a second layer formed on and in contact with the first layer, the second layer having a reflectivity lower than that of the first layer,
one of the first and second layers is between the substrate and an other of the first and second layers,
the first layer includes a first lower surface, a first upper surface opposed to the first lower surface and between the first lower surface and the second layer, and a first side surface intersecting with the first lower surface and the first upper surface,
the second layer includes a second lower surface contacting the first upper surface, and a second upper surface located at an opposite side of the first layer with respect to the second lower surface,
the first upper surface has a first outer edge and a second outer edge opposed to the first outer edge,
the second lower surface has a third outer edge and a fourth outer edge opposed to the third outer edge,
the third outer edge does not overlap the first and second outer edges,
the fourth outer edge does not overlap the first and second outer edges,
the first layer has a first outermost outer edge and a second outermost outer edge opposed to the first outermost outer edge,
the second layer has a third outermost outer edge and a fourth outermost outer edge opposed to the third outermost outer edge,
the third outermost outer edge is positioned outside the first outermost outer edge and located at an opposite side of the second outermost outer edge with respect to the first outermost outer edge, and
the fourth outermost outer edge is positioned outside the second outermost outer edge and located at an opposite side of the first outermost outer edge with respect to the second outermost outer edge.

15. The sensor device of claim 14 , wherein the first lower surface and the first side surface form an angle of 90° or less.

16. The sensor device of claim 14 , wherein the first lower surface and the first side surface form an obtuse angle.

17. The sensor device of claim 14 , wherein the substrate includes a first main surface and a second main surface above the first main surface, and the first lower surface contacts the second main surface.

18. The sensor device of claim 14 , wherein the substrate includes a first main surface and a second main surface above the first main surface, and the second upper surface contacts the first main surface.

19. The sensor device of claim 14 , further comprising a sensor drive electrode which is positioned in the same layer where the detection electrode is positioned, wherein
the sensor drive electrode includes a third layer which is positioned in the same layer where the first layer is disposed, and a fourth layer above the third layer, and
the third layer is formed of the same material used for the first layer, and the fourth layer is formed of the same material used for the second layer.

20. The sensor drive of claim 14 , further comprising an insulating film covering the detection electrode.

Assignees

• Japan Display Inc

Inventors

• Ishizaki Koji
• Sonoda Daisuke
• Ide Tatsuya
• Ito Hiroyuki

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title

• G06F2203/04111

  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 title