Thin film encapsulation unit, organic light emitting diode display including the same and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10559637-B2
Application number	US-201815871102-A
Country	US
Kind code	B2
Filing date	Jan 15, 2018
Priority date	Sep 14, 2012
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A thin film encapsulation unit including an inorganic layer, a first organic layer on the inorganic layer and including a light-blocking unit and a light-transmitting unit, and a reflection-preventing layer on the first organic layer.

First claim

What is claimed is:

1. A thin film encapsulation unit comprising:
an inorganic layer;
a first organic layer on the inorganic layer and comprising a light-blocking portion and a light-transmitting portion; and
a second organic layer comprising a transparent organic material,
wherein the inorganic layer is located between the first organic layer and the second organic layer and does not contact the second organic layer, and
wherein the light-transmitting portion comprises a same transparent organic material as that of the second organic layer.

2. The thin film encapsulation unit of claim 1 , wherein the second organic layer comprises a plurality of second organic layers and the inorganic layer comprises a plurality of inorganic layers, and
wherein the second organic layers and the inorganic layers are iteratively layered.

3. The thin film encapsulation unit of claim 1 , wherein the first organic layer comprises a plurality of organic layers and the inorganic layer comprises a plurality of inorganic layers, and
wherein the inorganic layers and the organic layers are alternately layered.

4. The thin film encapsulation unit of claim 1 , wherein the light-blocking portion comprises an organic material comprising a black pigment.

5. The thin film encapsulation unit of claim 1 , further comprising a reflection-preventing layer on the first organic layer,
wherein the reflection-preventing layer comprises a metal layer and a dielectric material layer.

6. The thin film encapsulation unit of claim 5 , wherein transmittance of the reflection-preventing layer is about 30% to about 70%.

7. The thin film encapsulation unit of claim 5 , wherein the metal layer comprises at least one of chromium, molybdenum, titanium, tungsten, or an alloy thereof.

8. The thin film encapsulation unit of claim 5 , wherein the dielectric material layer comprises a high-refractive index layer and a low-refractive index layer,
wherein the high-refractive index layer comprises a material having a refractive index of about 1.6 or higher, and
wherein the low-refractive index layer comprises a material having a refractive index of less than about 1.6.

9. The thin film encapsulation unit of claim 5 , wherein the reflection-preventing layer comprises a first chromium layer, a first silicon oxide layer, a second chromium layer, a titanium oxide layer, and a second silicon oxide layer.

10. The thin film encapsulation unit of claim 1 , wherein both of the light-blocking portion and the light-transmitting portion are in contact with the inorganic layer.

11. An organic light emitting diode display comprising:
a substrate on which an organic light emitting element is disposed;
an inorganic layer on the substrate and covering the organic light emitting element;
a first organic layer on the inorganic layer and comprising a light-blocking portion and a light-transmitting portion; and
a second organic layer comprising a transparent organic material,
wherein the inorganic layer is located between the first organic layer and the second organic layer, directly contacts the first organic layer, does not contact the second organic layer, and is a single layer.

12. The organic light emitting diode display of claim 11 , wherein the second organic layer comprises a plurality of second organic layers and the inorganic layer comprises a plurality of inorganic layers, and
wherein the second organic layers and the inorganic layers are iteratively layered.

13. The organic light emitting diode display of claim 11 , wherein the first organic layer comprises a plurality of organic layers and the inorganic layer comprises a plurality of inorganic layers, and
wherein the inorganic layers and the organic layers are alternately layered.

14. The organic light emitting diode display of claim 11 , wherein the light-blocking portion comprises an organic material comprising a black pigment.

15. The organic light emitting diode display of claim 11 , further comprising a reflection-preventing layer on the first organic layer,
wherein the reflection-preventing layer comprises a metal layer and a dielectric material layer.

16. The organic light emitting diode display of claim 15 , wherein transmittance of the reflection-preventing layer is about 30% to about 70%.

17. The organic light emitting diode display of claim 15 , wherein the metal layer comprises at least one of chromium, molybdenum, titanium, tungsten, or an alloy thereof.

18. The organic light emitting diode display of claim 15 , wherein the dielectric material layer comprises a high-refractive index layer and a low-refractive index layer,
wherein the high-refractive index layer comprises a material having a refractive index of about 1.6 or higher, and
wherein the low-refractive index layer comprises a material having a refractive index of less than about 1.6.

19. The organic light emitting diode display of claim 15 , wherein the reflection-preventing layer comprises a first chromium layer, a first silicon oxide layer, a second chromium layer, a titanium oxide layer, and a second silicon oxide layer.

20. The organic light emitting diode display of claim 11 , wherein both of the light-blocking portion and the light-transmitting portion are in contact with the inorganic layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Byoung-Duk
• Chung Yun-Ah
• Cho Yoon-Hyeung

Classifications

• H01L51/5253

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L2251/301

  Electricity · mapped topic

• H01L27/3258 Primary

  Electricity · mapped topic

• H01L27/3248

  Electricity · mapped topic