ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD FOR FABRICATING THE SAME

• US 20140001447A1
• Filed: 12/20/2012
• Published: 01/02/2014
• Est. Priority Date: 06/27/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: KIM, Jong Sung, KIM, Ho Jin
• Granted Patent: US 9,252,193 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An OLED device includes a substrate including first through fourth sub-pixel regions arranged in a quad type, a first electrode disposed on each of the first through fourth sub-pixel regions, a first functional layer disposed on all the first through fourth sub-pixel regions and configured to emit first color light, a second functional layer formed in a stripe shape, which progresses along the second and fourth sub-pixel regions arranged in a row direction, and configured to emit second color light, a third functional layer formed in another stripe shape, which progresses along the third and fourth sub-pixel regions arranged in a column direction, and configured to emit third color light, and a second electrode disposed on the entire surface of the substrate including the first through third functional layers.

Claims

1. An organic light emitting display device comprising:

a substrate including first through fourth sub-pixel regions arranged in a quad type;

a first electrode disposed on each of the first through fourth sub-pixel regions;

a first functional layer disposed on all the first through fourth sub-pixel regions and configured to emit first color light;

a second functional layer formed in a stripe shape, which progresses along the second and fourth sub-pixel regions arranged in a row direction, and configured to emit second color light;

a third functional layer formed in another stripe shape, which progresses along the third and fourth sub-pixel regions arranged in a column direction, and configured to emit third color light; and

a second electrode disposed on the entire surface of the substrate including the first through third functional layers.

2. The organic light emitting display device of claim 1, wherein the first sub-pixel region is formed with a larger dimension than those of the second through fourth sub-pixel regions.

3. The organic light emitting display device of claim 2, wherein the second and third functional layers are each formed in a rectangular shape with respective end portions crossing each other.

4. The organic light emitting display device of claim 2, wherein the first through third functional layers overlap one another in the fourth sub-pixel region so that the fourth sub-pixel region is able to display a white color.

5. The organic light emitting display device of claim 1, further comprising:

a first sub-functional layer disposed configured to emit the first color light; and

an electrical charge generation layer disposed on the first sub-functional layer.

6. The organic light emitting display device of claim 1, further comprising:

first through third sub-functional layers formed in the same structure as the first through third functional layers; and

an electrical charge generation layer disposed under the first functional layer.

7. The organic light emitting display device of claim 1, wherein the first color light is blue light.

8. The organic light emitting display device of claim 5, further comprising:

at least one of a sub hole injection layer and a sub hole transport layer that are interposed between the first electrode and the first sub-functional layer.

9. The organic light emitting display device of claim 6, further comprising:

at least one of a sub hole injection layer and a sub hole transport layer that are interposed between the first electrode and the first sub-functional layer.

10. The organic light emitting display device of claim 5, wherein the electrical charge generation layer includes an N-type electrical-charge generation layer and a P-type electrical-charge generation layer.

11. A method of fabricating an organic light emitting display device, the method comprising:

preparing a substrate including first through fourth sub-pixel regions arranged in a quad type;

forming a first electrode on each of the first through fourth sub-pixel regions;

forming a first functional layer, which is configured to emit first color light, on all the first through fourth sub-pixel regions;

using a first mask to form a second functional layer, which is configured to emit second color light, in a first stripe shape progressing along the second and fourth sub-pixel regions that are arranged in a first (row) direction;

using a second mask to form a third functional layer, which crosses the second functional layer and is configured to emit third color light, in a second stripe shape progressing along the third and fourth sub-pixel regions that are arranged in a second (column) direction; and

forming a second electrode on the entire surface of the substrate including the first through third functional layers.

12. The method of claim 11, wherein the first mask is used through a first deposition process and includes a first opening of the first stripe shape, and the second mask is used through a second deposition process and includes a second opening of the second stripe shape crossing the first opening.

13. The method of claim 11, further comprising:

forming a first sub-functional layer to emit the first color light; and

forming an electrical charge generation layer on the first sub-functional layer.

14. The method of claim 11, further comprising:

forming first through third sub-functional layers in the same structure as the first through third functional layers; and

forming an electrical charge generation layer on the first sub-functional layer.

15. The method of claim 11, wherein the first sub-pixel region is formed with a larger dimension than that of each of the second through fourth sub-pixel regions.

16. The method of claim 15, wherein the second and third sub-functional layers are formed in a rectangular shape with respective end portions crossing each other.

17. The method of claim 15, wherein the first through third functional layers overlap one another in the fourth sub-pixel region so that the fourth sub-pixel region displays a white color.

18. The method of claim 11, wherein the first color light is blue light.