Organic light emitting diode device

Patent metadata

Field	Value
Publication number	US-2020168670-A1
Application number	US-201916578695-A
Country	US
Kind code	A1
Filing date	Sep 23, 2019
Priority date	Nov 28, 2018
Publication date	May 28, 2020
Grant date	—

Abstract

An inorganic light emitting diode device includes: a substrate including a plurality of sub-pixels; a thin film transistor (TFT) in each of the plurality of sub-pixels, wherein the TFT has at least one inorganic layer; an encapsulation layer on an organic light emitting layer, wherein the encapsulation layer includes at least one organic encapsulation layer and at least one inorganic encapsulation layer; and an opening exposing the inorganic layer of the TFT, wherein the opening connects the at least one inorganic encapsulation layer with the inorganic layer of the TFT.

First claim

What is claimed is:

1 . A flexible organic light emitting diode (OLED) device, comprising:
a substrate including a plurality of sub-pixels, each of the plurality of sub-pixels including a driving TFT; an inter-layered insulating layer covering the driving TFT; an overcoat layer on the inter-layered insulating layer; a first electrode on the overcoat layer and in each of the plurality of sub-pixels; a bank covering an edge portion of the first electrode; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer; and a protection film on the second electrode, wherein a location of a first hole is based on a location of the bank, and is in at least one of the overcoat layer, the bank, and the protection film.

2 . The flexible OLED device of claim 1 , wherein:
the protection film includes a first protective film and a third protective film that are each formed of an inorganic insulating material, and a second protective film formed of an organic insulating material, and the first hole is in the second protective film.

3 . The flexible OLED device of claim 1 , wherein:
the protection film includes a first protective film and a third protective film that are each formed of an inorganic insulating material, and a second protective film and a fourth protective film that are each formed of an organic insulating material, and wherein the first hole is in the second and fourth protective films.

4 . The flexible OLED device of claim 3 , wherein:
the first hole is in the second protective film, and a location of a second hole is based on the location of the first hole and is in the fourth protective film.

5 . The flexible OLED device of claim 1 , wherein the first hole is on the bank and passes through the organic light emitting layer, the second electrode, and the protection film.

6 . The flexible OLED device of claim 5 , wherein the protection film is formed using an atomic layer deposition method.

7 . The flexible OLED device of claim 5 , wherein the first hole is located at at least two sides of each of the plurality of sub-pixels, or at one of the at least two sides of each of the plurality of sub-pixels.

8 . The flexible OLED device of claim 1 , wherein the first hole is in the first electrode located below the bank, and a location of a second hole is based on the location of the first hole and is in the overcoat layer.

9 . The flexible OLED device of claim 8 , wherein the protection film is formed using an atomic layer deposition method.

10 . The flexible OLED device of claim 8 , wherein the second hole has a width greater than that of the first hole such that the first electrode and the overcoat layer form an undercut.

11 . The flexible OLED device of claim 10 , wherein the protection film located at a region of the undercut has a tip shape.

12 . The flexible OLED device of claim 8 , wherein the second hole exposes the inter-layered insulating layer.

13 . The flexible OLED device of claim 1 , further comprising a spacer on the bank, wherein the spacer has an inverted taper shape.

14 . An organic light emitting diode (OLED) device, comprising:
a substrate including a plurality of sub-pixels; a thin film transistor (TFT) in each of the plurality of sub-pixels, wherein the TFT has at least one inorganic layer; an encapsulation layer on an organic light emitting layer, wherein the encapsulation layer includes at least one organic encapsulation layer and at least one inorganic encapsulation layer; and an opening exposing the inorganic layer of the TFT, wherein the opening connects the at least one inorganic encapsulation layer with the inorganic layer of the TFT.

15 . The OLED device of claim 14 , wherein the inorganic layer of the TFT is an insulating layer or a passivation layer.

16 . The OLED device of claim 14 , wherein the opening defines at least one area in a bending region for reducing stress caused by bending the OLED device.

17 . The OLED device of claim 16 , wherein the area includes at least one sub-pixel.

18 . The OLED device of claim 16 , wherein the area is encapsulated by an inorganic material.

19 . The OLED device of claim 14 , wherein the opening exposes a touch electrode.

20 . The OLED device of claim 19 , wherein the touch electrode is connected to a drain electrode of the TFT or a first signal line on the substrate.

21 . The OLED device of claim 20 , further comprising:
a touch panel driving portion at a non-display region other than a bezel region, wherein the touch panel driving portion is configured to supply a touch input driving signal to the touch electrode through the first signal line, and wherein the touch electrode is configured to supply a touch input sensing signal to the touch panel driving portion through the first signal line.

22 . The OLED device of claim 20 , wherein the first signal line is a data line.

23 . The OLED device of claim 20 , wherein a driving power is configured to be supplied to the touch electrode through the first signal line.

24 . The OLED device of claim 14 , further comprising a filling member on the at least one inorganic encapsulation layer and filling the opening.

25 . The OLED device of claim 14 , wherein the substrate is a flexible substrate.

26 . A flexible organic light emitting diode (OLED) device, comprising:
a substrate including a plurality of sub-pixels, each of the plurality of sub-pixels including a driving TFT; an inter-layered insulating layer covering the driving TFT; an overcoat layer on the inter-layered insulating layer; a first electrode on the overcoat layer and in each of the plurality of sub-pixels; a bank covering an edge portion of the first electrode; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer; and a protection film on the second electrode, wherein the protection film includes at least one inorganic layer, wherein a location of a first hole is based on a location of the bank, and exposes at least one of the overcoat layer, the bank, and the protection film, and a location of a second hole is based on the location of the first hole.

27 . The flexible OLED device of claim 26 , wherein the second hole has a width greater than that of the first hole such that the first electrode and the overcoat layer form an undercut.

28 . The flexible OLED device of claim 27 , wherein the undercut has a tip shape.

29 . The flexible OLED device of claim 27 , wherein the first electrode is connected to the inorganic layer of the protection film at the undercut, and is configured to reduce moisture permeation to the organic light emitting layer.

30 . The flexible OLED device of claim 26 , wherein the first electrode includes a metal material.

31 . The flexible OLED device of claim 26 , wherein the first hole and the second hole define at least one area in a bending region for reducing stress caused by bending the flexible OLED device.

32 . The OLED device of claim 26 , further comprising an organic encapsulation layer between a first inorganic encapsulation layer and a second inorganic encapsulation layer of the at least one inorganic encapsulation layer.

33 . The OLED devi

Assignees

• Lg Display Co Ltd

Inventors

• Kim Mi-Seong
• Yoo Se-Jong
• Lee Kyoung-Mook

Classifications

• H01L27/3246

  Electricity · mapped topic

• H01L51/5203

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L2251/308

  Electricity · mapped topic