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

Patent metadata

Field	Value
Publication number	US-9905623-B2
Application number	US-201514954941-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Sep 14, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

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 unit and a light-transmitting unit; 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,
wherein the light-transmitting unit comprises a same transparent organic material as that of the second organic layer, and
wherein both of the light-transmitting unit and the light-blocking unit are disposed directly on the inorganic 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,
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,
wherein the inorganic layers and the first organic layers are alternately layered.

4. The thin film encapsulation unit of claim 1 , wherein the light-blocking unit 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 (Cr), molybdenum (Mo), titanium (Ti), tungsten (W), 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. 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 unit and a light-transmitting unit; 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,
wherein the light-transmitting unit comprises a same transparent organic material as that of the second organic layer,
wherein the light-blocking unit and the light-transmitting unit are disposed directly adjacent to each other in a direction substantially parallel to the inorganic layer, and
wherein both of the light-transmitting unit and the light-blocking unit are disposed directly on the inorganic layer.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• H01L27/3246

  Electricity · mapped topic

• H01L27/3258 Primary

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L51/5256

  Electricity · mapped topic