Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9627457-B2
Application number	US-201414243363-A
Country	US
Kind code	B2
Filing date	Apr 2, 2014
Priority date	Jul 5, 2013
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

An organic light emitting display device includes a spacer on a pixel defining layer. The pixel defining layer includes openings corresponding to pixels. The device further includes first pixels to third pixels emitting light having different colors. The first pixels and the second pixels are alternately disposed in a row direction, and the third pixels are continuously disposed in a row direction. The row in which the first pixels and the second pixels are alternately disposed and the row in which the third pixels are continuously disposed are adjacent to each other in a column direction The spacer is disposed between two of the third pixels.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a substrate;
a pixel defining layer on the substrate, the pixel defining layer including first, second, third, and fourth portions and surrounding a plurality of openings corresponding to a plurality of pixels including a plurality of first pixels, a plurality of second pixels, and a plurality of third pixels emitting light of different colors, the first portion of the pixel defining layer between the first and third pixels, the second portion of the pixel defining layer between the second and third pixels, the third portion of the pixel defining layer between the third pixels, the fourth portion of the pixel defining layer between the first and second pixels; and
a spacer on the pixel defining layer, wherein
the first pixels and the second pixels are alternately disposed in a row direction, and the third pixels are continuously disposed in the row direction, wherein:
the row in which the first pixels and the second pixels are alternately disposed and the row in which the third pixels are continuously disposed are adjacent to each other in a column direction, and
the spacer is selectively disposed on the third portion of the pixel defining layer between the third pixels among the first, second, third, and fourth portions of the pixel defining layer, and wherein
a height of the spacer is substantially 3,000 to 7,000 Å.

2. The organic light emitting display device as claimed in claim 1 , wherein the row in which the first pixels and the second pixels are alternately disposed and the row in which the third pixels are continuously disposed, are alternately disposed in the column direction.

3. The organic light emitting display device as claimed in claim 1 , further comprising:
a plurality of anodes including first to third anodes on the substrate;
a plurality of organic emission layers on the plurality of anodes; and
a cathode on the organic emission layers, wherein:
the first anodes are in the first pixels, the second anodes are in the second pixels, the third anodes are in the third pixels, and a partial region of the plurality of anodes is below the pixel defining layer, and wherein the spacer overlaps the third anodes.

4. The organic light emitting display device as claimed in claim 3 , wherein the organic emission layers include:
a plurality of first organic emission layers in the first pixels and emitting light of a first color;
a plurality of second organic emission layers in the second pixels and emitting light of a second color; and
a third organic emission layer in the first to third pixels and emitting light of a third color.

5. The organic light emitting display device as claimed in claim 4 , wherein the third organic emission layer is on the first organic emission layers and the second organic emission layers.

6. The organic light emitting display device as claimed in claim 4 , wherein the third organic emission layer is below the first organic emission layers and the second organic emission layers.

7. The organic light emitting display device as claimed in claim 1 , wherein
a height of the pixel defining layer is substantially 2,000 to 5,000 Å.

8. The organic light emitting display device as claimed in claim 1 , wherein a distance between the spacer and a pixel of the first pixels adjacent to the spacer and a distance between the spacer and a pixel of the second pixels adjacent to the spacer are about 8 μm or more.

9. The organic light emitting display device as claimed in claim 1 , wherein a distance between the spacer and a pixel of the third pixels adjacent to the spacer is about 3 μm or less.

10. The organic light emitting display device as claimed in claim 1 , wherein the pixel defining layer and the spacer are integrally formed.

11. A method of manufacturing an organic light emitting display device, comprising:
forming a plurality of anodes including a plurality of first anodes, a plurality of second anodes, and a plurality of third anodes on a substrate;
forming a pixel defining layer on the plurality of anodes and the substrate, the pixel defining layer including first, second, third, and fourth portions and surrounding a plurality of openings exposing respective areas of the plurality of anodes, the first portion of the pixel defining layer between the first and third anodes, the second portion of the pixel defining layer between the second and third anodes, the third portion of the pixel defining layer between the third anodes, the fourth portion of the pixel defining layer between the first and second pixels;
forming a spacer on the pixel defining layer;
forming a plurality of first organic emission layers on the first anodes and forming a plurality of second organic emission layers on the second anodes;
forming a third organic emission layer on the first organic emission layers and the second organic emission layers; and
forming a cathode on the third organic emission layer, wherein
the first anodes and the second anodes are alternately disposed in a row direction and the third anodes are continuously disposed in the row direction, wherein:
the row in which the first anodes and the second anodes are alternately disposed and the row in which the third anodes are continuously disposed are adjacent to each other in a column direction, and
the spacer is selectively disposed on the third portion of the pixel defining layer between the openings exposing two adjacent third anodes in the row direction among the first, second, third, and fourth portions of the pixel defining layer, and wherein
a height of the spacer is substantially 3,000 to 7,000 Å.

12. The method as claimed in claim 11 , wherein the first organic emission layers and the second organic emission layers are formed by laser transfer.

13. The method as claimed in claim 11 , wherein the spacer is formed to overlap the third anodes.

14. The method as claimed in claim 11 , wherein a height of the pixel defining layer is substantially 2,000 to 5,000 Å.

15. The method as claimed in claim 14 , wherein a distance between the spacer and an anode of the first anodes adjacent to the spacer and a distance between the spacer and an anode of the second anodes adjacent to the spacer are about 8 μm or more.

16. The method as claimed in claim 14 , wherein a distance between the spacer and one of the plurality of openings corresponding to the third anodes adjacent to the spacer is about 3 μm or less.

17. The method as claimed in claim 11 , wherein the spacer is formed on the pixel defining layer by deposition.

18. The method as claimed in claim 17 , wherein the spacer is formed by selectively removing the pixel defining layer.

19. A method of manufacturing an organic light emitting display device, comprising:
preparing a substrate including a base, a plurality of thin film transistors disposed on the base, and an insulating layer on the thin film transistors and having a plurality of via holes exposing respective areas of the plurality of thin film transistors;
forming a plurality of anodes on the substrate, the plurality of anodes connected to the plurality of thin film transistors through the plurality of via holes, the plurality of anodes including a plurality of first anodes, a plurality of second anodes, and a plurality of third anodes;
forming a pixel defining layer on the plurality of anodes, the pixel defining layer including a plurality of openings exposing respective areas of the plurality of anodes;
forming a spacer on the pixel defining layer;
forming a th

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sang Bong

Classifications

• H10K59/8791 Primary

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/353 Primary

  characterised by the geometrical arrangement of the RGB subpixels · CPC title

• H01L2251/558

  Electricity · mapped topic