Display device

Patent metadata

Field	Value
Publication number	US-2021271367-A1
Application number	US-202017086434-A
Country	US
Kind code	A1
Filing date	Nov 1, 2020
Priority date	Feb 27, 2020
Publication date	Sep 2, 2021
Grant date	—

Abstract

Provided is a display device which includes a display panel that includes an active area and a peripheral area and an input sensing layer that includes a first conductive layer and a second conductive layer. The first conductive layer includes first trace lines and second trace lines. The second conductive layer includes first sensing electrodes and second sensing electrodes. The first trace lines extend in a second direction, are disposed apart from each other in a first direction, and are electrically connected to the first sensing electrodes, respectively. The second trace lines extend in the second direction, are disposed apart from each other in the first direction, and are electrically connected to the second sensing electrodes, respectively. The first conductive layer and the second conductive layer overlap the active area of the display panel.

First claim

What is claimed is:

1 . A display device comprising:
a display panel comprising an active area and a peripheral area disposed outside the active area; and an input sensing layer disposed on the display panel, the input sensing layer comprising a first conductive layer and a second conductive layer, wherein the first conductive layer comprises first trace lines and second trace lines insulated from the first trace lines, the second conductive layer comprises first sensing electrodes extending in a first direction and disposed apart from each other in a second direction, and second sensing electrodes disposed apart from each other in the first direction and the second direction, the first trace lines extend in the second direction, are disposed apart from each other in the first direction, and are electrically connected to the first sensing electrodes, respectively, the second trace lines extend in the second direction, are disposed apart from each other in the first direction, and are electrically connected to the second sensing electrodes, respectively, and the first conductive layer and the second conductive layer overlap the active area of the display panel.

2 . The display device of claim 1 , wherein the input sensing layer further comprises:
first signal lines connected to the first trace lines; and second signal lines connected to the second trace lines.

3 . The display device of claim 2 , wherein the first signal lines and the second signal lines overlap the peripheral area of the display panel.

4 . The display device of claim 2 , wherein the first signal lines and the second signal lines are provided in the first conductive layer.

5 . The display device of claim 1 , further comprising a first insulating layer disposed between the first conductive layer and the second conductive layer.

6 . The display device of claim 5 , wherein each of the first sensing electrodes is electrically connected to a corresponding one of the first trace lines via a first contact hole that passes through the first insulating layer.

7 . The display device of claim 5 , wherein each of the second sensing electrodes is electrically connected to a corresponding one of the second trace lines via a second contact hole that passes through the first insulating layer.

8 . The display device of claim 1 , wherein each of the first trace lines comprises:
a first trace electrode which overlaps a corresponding one of the first sensing electrodes; and a line portion which is electrically connected to the first trace electrode and extends in the second direction.

9 . The display device of claim 8 , wherein each of the first sensing electrodes and the second sensing electrodes has a mesh shape.

10 . The display device of claim 9 , wherein the first trace electrode has a mesh shape.

11 . The display device of claim 8 , wherein, when the number of the first sensing electrodes is greater than the number of the second sensing electrodes, a size of the first trace electrode is smaller than a size of the corresponding one of the first sensing electrodes.

12 . The display device of claim 8 , wherein, when the number of the first sensing electrodes is less than or equal to the number of the second sensing electrodes, a size of the first trace electrode is equal to a size of the corresponding one of the first sensing electrodes.

13 . The display device of claim 3 , wherein the first trace lines have the same length in the second direction.

14 . The display device of claim 1 , wherein each of the second trace lines comprises:
trace portions, each of which overlaps a corresponding one of the second sensing electrodes; and a connection electrode which electrically connects the trace portions.

15 . The display device of claim 14 , wherein a size of each of the trace portions is equal to a size of the corresponding one of the second sensing electrodes.

16 . The display device of claim 1 , wherein, when the number of the first sensing electrodes is greater than the number of the second sensing electrodes,
the number of the first trace lines is greater than the number of the second trace lines.

17 . The display device of claim 1 , wherein, when the number of the first sensing electrodes is greater than the number of the second sensing electrodes,
some of the first sensing electrodes are disposed adjacent to each other.

18 . The display device of claim 1 , wherein the display panel comprises:
a base layer comprising the active area and the peripheral area; a circuit element layer which comprises a pixel disposed in the active area of the base layer; a light emitting element layer which comprises light emitting elements provided on the circuit element layer; and a thin film encapsulation layer configured to cover the light emitting element layer and comprising an organic layer.

19 . The display device of claim 18 , wherein the first conductive layer of the input sensing layer is disposed directly on a top portion of the thin film encapsulation layer.

20 . The display device of claim 19 , further comprising an anti-reflection unit configured to reduce reflectivity of external light,
wherein the anti-reflection unit is disposed on the thin film encapsulation layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Soyeon
• Kim Kwanghyeok
• Kim Miyoung
• Park Yong-Hwan
• Jun Sanghyun

Classifications

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/04164 Primary

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F2203/04112

  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 title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04103

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