Electroluminescent Display Including Touch Sensor

Patent metadata

Field	Value
Publication number	US-2024160322-A1
Application number	US-202418418027-A
Country	US
Kind code	A1
Filing date	Jan 19, 2024
Priority date	Dec 29, 2017
Publication date	May 16, 2024
Grant date	—

Abstract

An electroluminescent display is disclosed. The electroluminescent display includes an electroluminescent element disposed in a display area of a substrate, an encapsulation unit disposed on the electroluminescent element, a first mesh electrode layer disposed on the encapsulation unit, an insulating layer covering the first mesh electrode layer, and a second mesh electrode layer disposed on the insulating layer. The first mesh electrode layer includes a first mesh electrode and a second mesh electrode separated from the first mesh electrode. The second mesh electrode layer includes a third mesh electrode extended in a first direction and a fourth mesh electrode extended in a second direction intersecting the first direction through the first mesh electrode intersecting the third mesh electrode.

First claim

What is claimed is:

1 . A foldable display comprising:
a substrate including a display region and a non-display region; a pad area on the non-display region; a transistor on the display region of the substrate, the transistor having an active layer, a source electrode, a drain electrode, and a gate electrode; a planarization layer on the transistor; an anode electrode on the planarization layer; a bank surrounding the anode electrode; a spacer on the bank; an electroluminescent layer on the anode electrode; a cathode electrode on the electroluminescent layer and the bank; an encapsulation unit on the cathode electrode; a touch buffer layer on the encapsulation unit; and a touch sensor on the touch buffer layer, wherein the touch sensor includes a first touch electrode and a second touch electrode, wherein the first touch electrode and the second touch electrode comprise a multi-layer structure including a first titanium layer, an aluminum layer, and a second titanium layer, and wherein a layer of the multi-layer structure has a different width at a portion crossing with the first touch electrode and the second touch electrode.

2 . The foldable display of claim 1 , wherein the spacer is higher than a height of a portion of the bank.

3 . The foldable display of claim 1 , wherein the electroluminescent layer has a single-layer structure or a multi-layer structure.

4 . The foldable display of claim 1 , wherein the encapsulation unit has a thickness of less than 10 m.

5 . The foldable display of claim 1 , wherein the encapsulation unit includes at least a first inorganic encapsulation layer and a second inorganic encapsulation layer.

6 . The foldable display of claim 5 , wherein the first inorganic encapsulation layer has a thickness of 0.1 m to 1.5 μm.

7 . The foldable display of claim 5 , wherein the second inorganic encapsulation layer has a thickness of 0.1 m to 1.5 m.

8 . The foldable display of claim 5 , wherein a thickness of the touch buffer layer is thinner than a thickness of the second inorganic encapsulation layer.

9 . The foldable display of claim 1 , further comprising:
a first touch insulating layer between the first touch electrode and the second touch electrode at the portion crossing with the first touch electrode and the second touch electrode.

10 . The foldable display of claim 9 , wherein the first touch insulating layer has a thickness of 0.01 m to 3 μm.

11 . The foldable display of claim 1 , further comprising:
a crack propagation blocking pattern in the non-display region, and a dam structure in the non-display region, wherein the crack propagation blocking pattern is disposed outside the dam structure.

12 . The foldable display of claim 1 , wherein the first touch electrode and the second touch electrode have a mesh structure.

13 . The foldable display of claim 1 , wherein the first touch electrode generates a first capacitance with the cathode electrode, and the second touch electrode generates a second capacitance with the first touch electrode.

14 . The foldable display of claim 1 , wherein at least one of the first touch electrode and the second touch electrode comprises a three-layer structure including a first titanium layer, an aluminum layer, and a second titanium layer.

15 . The foldable display of claim 1 , wherein the cathode electrode is on the spacer.

16 . The foldable display of claim 1 , wherein the cathode electrode is in contact with the spacer or the bank.

17 . The foldable display of claim 1 , wherein at least one of the first touch electrode and the second touch electrode overlaps the spacer or the bank.

18 . The foldable display of claim 1 , further comprising:
a shielding electrode on the substrate, the shielding electrode overlapping the bank or the transistor.

19 . The foldable display of claim 1 , wherein a distance between the first touch electrode and the cathode electrode in a central area of the bank is less than a distance between the first touch electrode and the cathode electrode in an emission region.

Assignees

• Lg Display Co Ltd

Inventors

• Han Jonghyun
• Shin Seungrok

Classifications

• H10K50/844

  Encapsulations · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• H10K59/873

  Encapsulations · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title