Organic light emitting display devices and methods of manufacturing organic light emitting display devices

Patent metadata

Field	Value
Publication number	US-9818811-B2
Application number	US-201514754654-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Sep 28, 2012
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

An organic light emitting display device is disclosed. The organic light emitting display device includes a substrate, a first electrode, a pixel defining layer, a first hydrophobic pattern, at least one charge transport layer, a second hydrophobic pattern, an organic light emitting layer and a second electrode. The substrate has a pixel region and a non pixel region surrounding the pixel region. The first electrode, the at least one charge transport layer and the organic light emitting layer are disposed on the substrate in the pixel region, while the pixel defining layer, the first hydrophobic pattern and the second hydrophobic pattern are disposed on the substrate in the non pixel region. The charge transport layer of one pixel is separated from a charge transport layer of another pixel by the first and second hydrophobic patterns to prevent crosstalk phenomenon.

First claim

What is claimed:

1. An organic light emitting display device, comprising:
a substrate having a pixel region and a non pixel region surrounding the pixel region;
a first electrode disposed on the substrate in the pixel region;
a pixel defining layer disposed on the substrate in the non pixel region;
a first hydrophobic pattern disposed on the pixel defining layer, the first hydrophobic pattern being spaced apart from the first electrode;
at least one charge transport layer disposed on the first electrode;
a second hydrophobic pattern disposed on the pixel defining layer to cover the first hydrophobic pattern, the second hydrophobic pattern contacting said at least one charge transport layer, said at least one charge transport layer not disposed between the first hydrophobic pattern and the second hydrophobic pattern;
an organic light emitting layer disposed on the at least one charge transport layer; and
a second electrode disposed on the organic light emitting layer, wherein a portion of the at least one charge transport layer overlaps the pixel defining layer, and the second hydrophobic pattern covers the portion of the at least one charge transport layer.

2. The organic light emitting display device of claim 1 , wherein each of the first hydrophobic pattern and the second hydrophobic pattern has a surface energy below about 20 dyne/cm 2 .

3. The organic light emitting display device of claim 1 , wherein the first hydrophobic pattern has an electric conductivity smaller than an electric conductivity of the at least one charge transport layer.

4. The organic light emitting display device of claim 1 , wherein the pixel defining layer has a thickness of about 100 nm to about 400 nm.

5. The organic light emitting display device of claim 1 , wherein the at least one charge transport layer includes a hole transfer layer and a hole injection layer.

6. The organic light emitting display device of claim 1 , wherein the at least one charge transport layer includes an electron transfer layer and an electron injection layer.

7. The organic light emitting display device of claim 1 , wherein the first hydrophobic pattern and the second hydrophobic pattern do not overlap with the first electrode.

8. The organic light emitting display device of claim 1 , wherein the first hydrophobic pattern has a thickness smaller than a thickness of the pixel defining layer, and the second hydrophobic pattern has a thickness larger than the thickness of the pixel defining layer.

9. The organic light emitting display device of claim 8 , wherein the first hydrophobic pattern and the second hydrophobic pattern extend in a first direction and a second direction substantially perpendicular to the first direction.

10. The organic light emitting display device of claim 8 , wherein the first hydrophobic pattern extends in a first direction and a second direction substantially perpendicular to the first direction, and the second hydrophobic pattern extends in the second direction.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Hyea-Weon
• Lee Dong-Won
• Son Young-Mok

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K50/16

  Electron transporting layers · CPC title

• H10K50/15

  Hole transporting layers · CPC title

• H10K59/8052

  Cathodes · CPC title

• H10K59/8051

  Anodes · CPC title