Organic Light Emitting Display Device and Method for Manufacturing the Same

Patent metadata

Field	Value
Publication number	US-2022013589-A1
Application number	US-202117370568-A
Country	US
Kind code	A1
Filing date	Jul 8, 2021
Priority date	Jul 13, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

Provided is an organic light emitting display device. The organic light emitting display device includes a lower substrate including sub-pixels, a display area, a non-display area, and an exposed area; a lower touch pad unit in the non-display area and adjacent to the exposed area on the lower substrate; an upper substrate disposed opposite to the remaining area excluding the exposed area of the lower substrate; an upper touch pad unit on the upper substrate so as to correspond to the lower touch pad unit; a first connection electrode in direct contact with the lower touch pad unit; a second connection electrode opposite to the first connection electrode and in direct contact with the upper touch pad unit; and a self-assembly contact member disposed between the first connection electrode and the second connection electrode so as to electrically connect the first connection electrode and the second connection electrode.

First claim

What is claimed is:

1 . An organic light emitting display device comprising:
a lower substrate including a plurality of sub-pixels, the lower substrate having a display area, a non-display area enclosing the display area, and an exposed area extending from one side of the non-display area; a lower touch pad unit formed in the non-display area, the lower touch pad unit adjacent to the exposed area on the lower substrate; an upper substrate opposite to a remaining area excluding the exposed area of the lower substrate; an upper touch pad unit on the upper substrate, the upper touch pad unit corresponding to the lower touch pad unit; a first connection electrode in direct contact with the lower touch pad unit; a second connection electrode opposite to the first connection electrode and in direct contact with the upper touch pad unit; and a self-assembly contact member disposed between the first connection electrode and the second connection electrode, the self-assembly contact member electrically connecting together the first connection electrode and the second connection electrode.

2 . The organic light emitting display device according to claim 1 , further comprising:
a thin film transistor formed in the display area of the lower substrate; an organic light emitting diode disposed on the thin film transistor; a filler unit filled in a space between the upper substrate and the organic light emitting diode; and a dam structure enclosing the filler unit in the non-display area, wherein the upper touch pad unit is disposed between the dam structure and the exposed area.

3 . The organic light emitting display device according to claim 2 , further comprising;
a first connection pad unit and a second connection pad unit in the exposed area of the lower substrate, wherein the first connection pad unit is connected to the thin film transistor, and the second connection pad unit is connected to the lower touch pad unit.

4 . The organic light emitting display device according to claim 1 , further comprising:
a touch sensor on the upper substrate, the touch sensor corresponding to the display area; and a touch line electrically connecting the touch sensor and the upper touch pad unit.

5 . The organic light emitting display device according to claim 1 , wherein the first connection electrode and the second connection electrode are formed of any one or an alloy of two or more of copper (Cu), silver (Ag), gold (Au), or aluminum (Al).

6 . The organic light emitting display device according to claim 1 , wherein the first connection electrode and the second connection electrode have a plate shape, a pillar shape, or a pyramid shape with a cut upper portion to have a flat surface thereon.

7 . The organic light emitting display device according to claim 1 , wherein heights of the first connection electrode and the second connection electrode are 0.1 μm to 8 μm.

8 . The organic light emitting display device according to claim 1 , wherein the self-assembly contact member comprises melted and assembled solder particles.

9 . The organic light emitting display device according to claim 8 , wherein the solder particles are alloy particles formed of two or more materials selected from a group consisting of silver, copper, lead, bismuth, zinc, tin, and indium.

10 . The organic light emitting display device according to claim 1 , further comprising:
a sealing member in the non-display area and encloses side surfaces of the first connection electrode, the self-assembly contact member, and the second connection electrode.

11 . The organic light emitting display device according to claim 10 , wherein the sealing member is between the first connection electrode, the self-assembly contact member, and the second connection electrode which are adjacent to each other, and the sealing member extends to cover at least a part of a side surface of the upper substrate corresponding to the non-display area adjacent to the exposed area.

12 . The organic light emitting display device according to claim 1 , wherein a distance between the upper touch pad and the lower touch pad is in a range of 10 μm to 100 μm.

13 . A manufacturing method of an organic light emitting display device, comprising:
preparing a lower substrate including a plurality of sub-pixels, the lower substrate having a display area, a non-display area enclosing the display area, and an exposed area extending from one side of the non-display area; forming a lower touch pad unit in the non-display area, the lower touch pad unit adjacent to the exposed area; forming an upper touch pad unit corresponding to the lower touch pad unit, a touch sensor corresponding to the display area, and a touch line connecting the touch sensor and the upper touch pad unit, on an upper substrate; patterning a first connection electrode on the lower touch pad unit that is in contact with the lower touch pad unit and patterning a second connection electrode on the upper touch pad unit that is in contact with the upper touch pad unit; applying a self-assembly composition including solder particles on the lower touch pad unit; disposing and attaching the lower substrate and the upper substrate such that the first connection electrode and the second connection electrode are opposite to each other; and forming the self-assembly contact member between the lower touch pad unit and the upper touch pad unit by heating the self-assembly composition.

14 . The manufacturing method of an organic light emitting display device according to claim 13 , wherein the first connection electrode and the second connection electrode are patterned to have heights of 0.1 μm to 8 μm.

15 . The manufacturing method of an organic light emitting display device according to claim 13 , wherein the first connection electrode and the second connection electrode are formed of any one or an alloy of two or more of copper (Cu), silver (Ag), gold (Au), and aluminum (Al) and the solder particles are alloy particles formed of two or more materials selected from a group consisting of silver, copper, lead, bismuth, zinc, tin, and indium.

16 . The manufacturing method of an organic light emitting display device according to claim 13 , further comprising:
before the disposing and attaching of the lower substrate and the upper substrate: forming a dam structure that encloses the display area in the non-display area of the lower substrate; and filling an adhesive in the dam structure, wherein the forming of the self-assembly contact member includes heating the display area and the non-display area.

17 . The manufacturing method of an organic light emitting display device according to claim 13 , further comprising:
after the forming of the self-assembly contact member: applying a pressure from the upper substrate to the lower substrate; applying a sealing composition in the non-display area that is in contact with all side surfaces of the first connection electrode, the self-assembly contact member, and the second connection electrode while maintaining the pressure; and hardening the sealing composition.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Joongha
• Lee Dongkyu
• Kim Booyoung
• Hong Youngjun
• Cho Onesouk
• Kim Seonghoon
• Kim Seyoung
• Yun Jaehwan
• Jeong Wongyu
• Sim Woojin

Classifications

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K59/80518

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title

• G06F3/04164 Primary

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