Organic light emitting diode display and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9203050-B2
Application number	US-201414221128-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	May 21, 2013
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

Disclosed is an organic light emitting diode display including an organic light emitting display panel configured to display an image, and a lower passivation film attached to a bottom of the organic light emitting diode display panel. The lower passivation film includes a support film that is in contact with the organic light emitting diode display panel, and a stress adjustment layer formed beneath the support film and configured to reduce a bending stress to be induced in the organic light emitting display panel when the organic light emitting display panel and the lower passivation film are bent.

First claim

What is claimed is:

1. An organic light emitting diode display comprising:
an organic light emitting display panel configured to display an image, and
a lower passivation film attached to a bottom of the organic light emitting diode display panel,
wherein the lower passivation film includes:
a support film that is in contact with the organic light emitting diode display panel, and
a stress adjustment layer formed beneath the support film and configured to reduce a bending stress to be induced in the organic light emitting display panel when the organic light emitting display panel and the lower passivation film are bent, wherein the organic light emitting diode display panel includes a flat portion and a bent portion.

2. The organic light emitting diode display of claim 1 , wherein the stress adjustment layer includes a plurality of stress adjustment patterns disposed adjacent to each other.

3. The organic light emitting diode display of claim 2 , wherein the stress adjustment patterns have any one selected from a triangular shape, a trapezoidal shape, and a semicircular shape.

4. The organic light emitting diode display of claim 3 , wherein lower ends of adjacent stress adjustment patterns are directly connected.

5. The organic light emitting diode display of claim 3 , wherein lower ends of adjacent stress adjustment patterns are spaced apart from each other.

6. The organic light emitting diode display of claim 2 , wherein the bent portion is positioned at an end of the flat portion.

7. The organic light emitting diode display of claim 6 , wherein:
the stress adjustment patterns include first stress adjustment patterns positioned corresponding to the flat portion and second stress adjustment patterns positioned corresponding to the bent portions, and
an interval between the second stress adjustment patterns is smaller than an interval between the first stress adjustment patterns.

8. The organic light emitting diode display of claim 7 , wherein the interval between the first stress adjustment patterns and the interval between the second stress adjustment patterns are intervals between central axes of upper ends of the first and second stress adjustment patterns, respectively.

9. The organic light emitting diode display of claim 6 , wherein the lower passivation film further includes a plane passivation layer formed beneath the support film and adjacent to the stress adjustment layer.

10. The organic light emitting diode display of claim 9 , wherein the plane passivation layer is positioned to correspond to the flat portion.

11. The organic light emitting diode display of claim 1 , wherein the organic light emitting diode display panel includes:
a flexible substrate attached to a top of the lower passivation film,
an organic light emitting element formed on the flexible substrate, and
a thin film encapsulation layer covering the organic light emitting element.

12. An organic light emitting diode (OLED) display comprising
an organic light emitting display panel configured to display an image and including a flat portion and a bent portion; and
a lower passivation film attached to a bottom of the organic light emitting diode display panel,
wherein the lower passivation film comprises:
a support film contacting the organic light emitting diode display panel, and
a stress adjustment layer formed beneath the support film, wherein
the stress adjustment layer comprises a plurality of unit stress adjustment patterns, each having a quadrilateral base and arranged adjacent to each other.

13. The OLED display of claim 12 , wherein the unit stress adjustment patterns each comprise four stress adjustment patterns positioned adjacent to each other and having pyramidal shapes.

14. The OLED display of claim 13 , wherein the four stress adjustment patterns of each unit stress adjustment pattern intersect at a common point.

15. The OLED display of claim 13 , wherein the unit stress adjustment patterns are arranged in repeating manner along each of a horizontal direction, a vertical direction, and a diagonal direction.

16. The OLED display of claim 15 , wherein bottom edges of two unit stress adjustment patterns positioned adjacent to each other along a diagonal direction are connected to each other.

17. The OLED display of claim 12 , wherein the organic light emitting diode display panel comprises:
a flexible substrate attached on the lower passivation film;
an organic light emitting element formed on the flexible substrate; and
a thin film encapsulation layer covering the organic light emitting element.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeong Chul Woo
• Park Soon Ryong
• So Jung Ho
• Baek Seok Gi
• Kim Kwang Hyeok
• Eom Jeong Yong

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K50/84

  Passivation; Containers; Encapsulations · CPC title

• H10K59/871 Primary

  Self-supporting sealing arrangements · CPC title

• H01L51/5237

  Electricity · mapped topic