Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-11849602-B2
Application number	US-202117494612-A
Country	US
Kind code	B2
Filing date	Oct 5, 2021
Priority date	Oct 21, 2020
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

An organic light emitting display device may include a filling part filling a space between a second substrate and an organic light emitting diode, and a dam structure disposed in a non-display area and surrounding the filling part. At least one of the dam structure and the filling part includes a getter. The getter of the present disclosure is composed of magnesium oxide particles whose surfaces are modified into a first surface modification part made of an amino silane-based compound and a second surface modification part bound to the first surface modification part and made of a compound containing an acrylate group and a methacrylate group. Accordingly, it is possible to provide an organic light emitting display device that has high transparency and of which optical properties and durability are improved by minimizing permeation of water and oxygen.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a first substrate which includes a plurality of sub-pixels and in which a display area and a non-display area that encloses the display area are defined;
a thin film transistor disposed on the first substrate;
an organic light emitting diode disposed on the thin film transistor;
a second substrate facing the first substrate;
a filling part filling a space between the second substrate and the organic light emitting diode; and
a dam structure disposed in the non-display area and surrounding the filling part,
wherein at least one of the dam structure and the filling part includes a getter, and
the getter is composed of magnesium oxide particles whose surfaces are modified into a first surface modification part made of an amino silane-based compound and a second surface modification part bound to the first surface modification part and made of a compound containing an acrylate group and a methacrylate group.

2. The organic light emitting display device according to claim 1 , wherein the magnesium oxide particles have an average diameter of from 10 nm to 300 nm.

3. The organic light emitting display device according to claim 1 , wherein the amino silane-based compound includes at least one selected from 3-(trimethoxysilylpropyl)diethylenetriamine, (3-aminopropyl)trimethoxysilane, 1-3-(trimethoxysilyl)propyl urea, (3-aminopropyl)triethoxysilane, 3-aminopropyl-methyl-diethoxysilane, N-3-(trimethoxysilyl)propyl ethylenediamine and N-(3-(dimethoxymethylsilyl)propyl ethylenediamine).

4. The organic light emitting display device according to claim 1 , wherein the compound containing the acrylate group and the methacrylate group is 3-(acryloyloxy)-2-hydroxypropyl methacrylate.

5. The organic light emitting display device according to claim 1 , wherein an amine group of the amino silane-based compound and the acrylate group of the compound containing the acrylate group and the methacrylate group are chemically bound to each other through a Michael addition reaction.

6. The organic light emitting display device according to claim 1 , wherein at least one of the dam structure and the filling part includes the getter and a base resin having a functional group to be bound to the getter.

7. The organic light emitting display device according to claim 6 , wherein the base resin is an acrylic-based resin and the functional group to be bound to the getter is a (met)acrylate group.

8. The organic light emitting display device according to claim 6 , wherein the getter is contained at a ratio of from 0.5 wt % to 20 wt % based on a total weight of the base resin and the getter.

9. The organic light emitting display device according to claim 1 , wherein the dam structure further includes a spacer and a filler.

10. The organic light emitting display device according to claim 1 , wherein the filling part further includes a filler.

11. The organic light emitting display device according to claim 1 , wherein the first substrate includes a plurality of sub-pixels in the display area, and
the organic light emitting diode emits white light, and
the organic light emitting display device further includes a color filter disposed in a part of the second substrate.

12. The organic light emitting display device according to claim 11 , wherein each of the plurality of sub-pixels includes an emissive area and a transmissive area.

13. The organic light emitting display device according to claim 12 , wherein the organic light emitting diode includes an anode disposed on the thin film transistor, a white organic emission layer disposed on the anode and a cathode disposed on the white organic emission layer, and
the anode overlaps with the emissive area and the white organic emission layer overlaps with the emissive area and the transmissive area.

Assignees

• Lg Display Co Ltd
• Univ Yonsei Iacf

Inventors

• Song Jaebin
• Jeong Dawoon
• Kim Sunghee
• Lee Suyeon
• Myoung Jaemin
• Baek Sung-Doo
• Kim Minseong

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/874

  including getter material or desiccant · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/8722

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

• H10K50/846 Primary

  comprising getter material or desiccants · CPC title