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

Patent metadata

Field	Value
Publication number	US-9595572-B2
Application number	US-201514954946-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Sep 14, 2012
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

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. An organic light emitting diode (OLED) display comprising:
a substrate on which an organic light emitting element is located;
an inorganic layer and a first organic layer on the substrate and covering the organic light emitting element; and
a reflection-preventing layer on the first organic layer,
wherein the first organic layer comprises a light-blocking unit and a light-transmitting unit, and
the first organic layer is disposed directly on the inorganic layer.

2. The OLED display of claim 1 , wherein the substrate comprises:
a light-emission area where the organic light emitting element is located; and
a non-light-emission area comprising an area other than the light-emission area,
wherein the light-blocking unit of the first organic layer corresponds to the non-light-emission area, and
wherein the light-transmitting unit corresponds to the light-emission area.

3. The OLED display of claim 2 , wherein the organic light emitting element comprises a first electrode, an organic emission layer, and a second electrode, and
wherein the light-emission area corresponds to the organic emission layer.

4. The OLED display of claim 1 , further comprising a plurality of inorganic layers and a plurality of organic layers, wherein the inorganic layers and the organic layers are alternately layered.

5. The OLED display of claim 1 , further comprising a second organic layer between the organic light emitting element and the first organic layer,
wherein the light-transmitting unit and the second organic layer are made of a same transparent organic material.

6. The OLED display of claim 1 , wherein the reflection-preventing layer comprises a metal layer and a dielectric material layer.

7. The OLED display of claim 6 , wherein transmittance of the reflection-preventing layer is about 30% to about 70%.

8. The OLED display of claim 6 , wherein the metal layer comprises at least one of chromium (Cr), molybdenum (Mo), titanium (Ti), tungsten (W), or an alloy thereof.

9. The OLED display of claim 6 , 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.

10. The OLED display of claim 6 , 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.

11. The OLED display of claim 1 , further comprising:
a transistor on the substrate;
an interlayer insulating layer on the transistor;
a first electrode of the organic light emitting element on the interlayer insulating layer and coupled with the transistor through a contact hole;
a pixel defining layer on the interlayer insulating layer and having an opening that exposes the first electrode;
an organic emission layer of the organic light emitting element in the opening; and
a second electrode of the organic light emitting element on the organic emission layer and the pixel defining layer,
wherein the light-blocking unit has a plane pattern that is the same as that of the pixel defining layer.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title

• H01L2251/301

  Electricity · mapped topic

• H01L27/3272

  Electricity · mapped topic