Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-11730038-B2
Application number	US-202217970084-A
Country	US
Kind code	B2
Filing date	Oct 20, 2022
Priority date	Jul 4, 2017
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A light emitting display device comprises a substrate, a first pixel electrode disposed on the substrate, a pixel defining film disposed on the first pixel electrode and having a first opening at least partially exposing the first pixel electrode, a first organic light emitting layer disposed on the pixel defining film and overlapping with the first opening of the pixel defining film, and a black matrix disposed on the first organic light emitting layer and having a first opening overlapping with the first organic light emitting layer. Light having passed through the first opening of the black matrix is one of red light, green light, and blue light. The first opening of the black matrix may have a shape with a curved portion.

First claim

What is claimed is:

1. A light emitting display device comprising:
a substrate;
a first pixel electrode disposed on the substrate;
a pixel defining layer disposed on the first pixel electrode and including a first opening at least partially exposing the first pixel electrode;
a first light emitting layer disposed on the first pixel electrode and overlapping with the first opening of the pixel defining layer;
a black matrix disposed on the first light emitting layer and including a second opening overlapping with the first light emitting layer;
a second pixel electrode disposed on the same layer as the first pixel electrode; and
a second light emitting layer disposed on the pixel defining layer and overlapping with the second pixel electrode, wherein
the second opening of the black matrix has a shape with a curved portion,
the pixel defining layer further comprises a third opening at least partially exposing the second pixel electrode, and
the black matrix further comprises a fourth opening overlapping with the second light emitting layer.

2. The light emitting display device of claim 1 , wherein the shape of the second opening of the black matrix is substantially a circular shape.

3. The light emitting display device of claim 2 , wherein the circular shape of the shape of the second opening of the black matrix is composed of assemblies of dots that are spaced substantially a same distance apart from a virtual center point of the first opening of the pixel defining layer in plan view.

4. The light emitting display device of claim 1 , further comprising a color filter disposed to cover the second opening of the black matrix.

5. The light emitting display device of claim 4 , further comprising an insulating layer disposed on the pixel defining layer,
wherein the black matrix and the color filter are disposed on the insulating layer.

6. The light emitting display device of claim 4 , wherein a width of a region in which the black matrix overlaps with one side of the color filter ranges from 6 μm to 12 μm.

7. The light emitting display device of claim 1 , wherein the fourth opening of the black matrix has a shape with a curved portion.

8. The light emitting display device of claim 1 , further comprising:
a third pixel electrode disposed on the same layer as the first pixel electrode; and
a third light emitting layer disposed on the pixel defining layer and overlapping with the third pixel electrode, wherein
the pixel defining layer further comprises a fifth opening at least partially exposing the third pixel electrode, and
the black matrix further comprises a sixth opening overlapping with the third light emitting layer.

9. The light emitting display device of claim 8 , wherein light having passed through the sixth opening of the black matrix, light having passed through the second opening of the black matrix, and light having passed through the fourth opening of the black matrix have different colors.

10. The light emitting display device of claim 8 , wherein a shortest distance from the third opening of the pixel defining layer to the first opening of the pixel defining layer is substantially the same as a shortest distance from the third opening of the pixel defining layer to the fifth opening of the pixel defining layer.

11. The light emitting display device of claim 8 , further comprising a first color filter layer disposed on the black matrix and including a seventh opening overlapping with the second opening of the black matrix and an eighth opening overlapping with the fourth opening of the black matrix, wherein
the first color filter layer overlaps with the sixth opening of the black matrix and surrounds the second opening of the black matrix and the fourth opening of the black matrix.

12. The light emitting display device of claim 11 , wherein the first color filter layer is a blue color filter layer for transmitting blue light.

13. The light emitting display device of claim 11 , further comprising:
a first color filter overlapping with the seventh opening of the first color filter layer; and
a second color filter overlapping with the eighth opening of the first color filter layer.

14. The light emitting display device of claim 11 , further comprising a second color filter layer disposed on the first color filter layer and overlapping with the second opening of the black matrix, wherein
the second color filter layer surrounds the eighth opening of the first color filter layer.

15. The light emitting display device of claim 8 , further comprising:
a first color filter overlapping with the second opening of the black matrix;
a second color filter overlapping with the fourth opening of the black matrix; and
a first color filter layer disposed on the first color filter and the second color filter, wherein
the first color filter layer overlaps with the sixth opening of the black matrix and surrounds the second opening of the black matrix and the fourth opening of the black matrix.

16. The light emitting display device of claim 1 , wherein the first opening of the pixel defining layer is non-elliptical and substantially circular in plan view.

17. A light emitting display device comprising:
a substrate;
a first pixel electrode disposed on the substrate;
a pixel defining layer disposed on the first pixel electrode and having a first opening at least partially exposing the first pixel electrode;
a first light emitting layer disposed on the pixel defining layer and overlapping with the first opening of the pixel defining layer; and
a black matrix disposed on the first light emitting layer and having a second opening overlapping with the first light emitting layer, wherein
light having passed through the second opening of the black matrix is one of red light, green light, and blue light, and
the second opening of the black matrix has a circular shape which is composed of assemblies of dots that are spaced substantially a same distance apart from a virtual center point of the second opening of the black matrix.

18. The light emitting display device of claim 17 , further comprising a color filter disposed to cover the second opening of the black matrix.

19. The light emitting display device of claim 18 , further comprising an encapsulation layer disposed on the pixel defining layer,
wherein the black matrix and the color filter are disposed on the encapsulation layer.

20. The light emitting display device of claim 18 , wherein a width of a region in which the black matrix overlaps with one side of the color filter ranges from 6 μm to 12 μm.

21. The light emitting display device of claim 17 , wherein the first opening of the pixel defining layer is substantially circular.

22. The light emitting display device of claim 17 , further comprising:
a second pixel electrode disposed on the same layer as the first pixel electrode; and
a second light emitting layer disposed on the pixel defining layer and overlapping with the second pixel electrode, wherein
the pixel defining layer further comprises a third opening at least partially exposing the second pixel electrode,
the black matrix further comprises a fourth opening overlapping with the second light emitting layer, and
light having passed through the fourth opening of the black matrix has a different color from the light having passed through the second opening of the black matrix.

23. The light emitting display device of claim 22 , wherein the fourth opening of the

Assignees

• Samsung Display Co Ltd

Inventors

• Joo Sun Kyu
• Kim Byung Chul
• Kim Sung Chul
• Kim Su Jeong
• Kim In Ok
• Mun Hye Ran
• Song In Seok
• Oh Keun Chan
• Lyu Jae Jin
• Lee Yui Ku

Classifications

• H10K50/865 Primary

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K50/805

  Electrodes · CPC title

• H10K71/00

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

• H10K59/122 Primary

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

• H10K59/8792

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