Display device

Patent metadata

Field	Value
Publication number	US-12069928-B2
Application number	US-202217584288-A
Country	US
Kind code	B2
Filing date	Jan 25, 2022
Priority date	Mar 9, 2021
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

A display device includes first and second light-emitting diodes in respective first and second emission areas, an encapsulation layer thereon, and including at least one inorganic encapsulation layer and at least one organic encapsulation layer, a color conversion-transmission layer on the encapsulation layer, and including a color conversion part to convert light emitted from the first or second light-emitting diodes into a different color, and a light blocking partition wall surrounding the color conversion part, first and second color filters on the color conversion-transmission layer, and respectively corresponding to the first and second emission areas, wherein respective first end portions of the first and second color filters are spaced from each other while overlapping the light blocking partition wall, and are partly covered with a third color material having a color that is different from the first and second color filters.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first light-emitting diode on the substrate in a first emission area;
a second light-emitting diode on the substrate in a second emission area;
an encapsulation layer on the first light-emitting diode and the second light-emitting diode, and comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer;
a color conversion-transmission layer on the encapsulation layer, and comprising a color conversion part configured to convert light emitted from one of the first light-emitting diode and the second light-emitting diode into light of a different color, and a light blocking partition wall surrounding the color conversion part;
a first color filter on the color conversion-transmission layer, and corresponding to the first emission area; and
a second color filter on the color conversion-transmission layer, and corresponding to the second emission area,
wherein a first end portion of the first color filter and a first end portion of the second color filter are spaced apart from each other with a gap therebetween while overlapping the light blocking partition wall, and are at least partly covered with a third color material having a color that is different from the first color filter and the second color filter.

2. The display device of claim 1 , wherein a portion of the third color material at least partially fills the gap.

3. The display device of claim 1 , wherein the third color material is in direct contact with a side surface of the first end portion of the first color filter and with a side surface of the first end portion of the second color filter.

4. The display device of claim 1 , further comprising an insulating layer on the color conversion-transmission layer,
wherein a lower surface of the first color filter, a lower surface of the second color filter, and a lower surface of the third color material are in direct contact with the insulating layer.

5. The display device of claim 1 , wherein a reflectance of the third color material is less than a reflectance of a first color material of the first color filter and is less than a reflectance of a second color material of the second color filter in a wavelength band of about 380 nm to about 780 nm.

6. The display device of claim 1 , wherein a refractive index of the third color material is less than a refractive index of the first color filter and is less than a refractive index of the second color filter.

7. The display device of claim 1 , wherein a height of the third color material is less than about 0.19 times a width of the third color material.

8. The display device of claim 1 , wherein a height of the third color material is greater than a height of a central portion of the first color filter and is greater than a height of a central portion of the second color filter.

9. The display device of claim 1 , further comprising an overcoat layer on the first color filter and the second color filter,
wherein a lower surface of the overcoat layer comprises a concave surface corresponding to a convex upper surface of the third color material.

10. A display device comprising:
a first light-emitting diode in a first emission area;
a second light-emitting diode in a second emission area;
an encapsulation layer on the first light-emitting diode and the second light-emitting diode, and comprising at least one inorganic encapsulation layer and at least one organic encapsulation layer;
a first color filter on the encapsulation layer, corresponding to the first emission area, and having a first color; and
a second color filter on the encapsulation layer, corresponding to the second emission area, and having a second color,
wherein a first end portion of the first color filter and a first end portion of the second color filter are spaced apart from each other with a gap therebetween, and are at least partly covered with a third color material having a third color.

11. The display device of claim 10 , wherein a portion of the third color material at least partially fills the gap.

12. The display device of claim 10 , wherein the third color material is in direct contact with a side surface of the first end portion of the first color filter and with a side surface of the first end portion of the second color filter.

13. The display device of claim 10 , further comprising an insulating layer below the first color filter and the second color filter,
wherein a lower surface of the first color filter, a lower surface of the second color filter, and a lower surface of the third color material are each in direct contact with the insulating layer.

14. The display device of claim 10 , wherein a reflectance of the third color material is less than a reflectance of a first color material of the first color filter and is less than a reflectance of a second color material of the second color filter in a wavelength band of about 380 nm to about 780 nm.

15. The display device of claim 10 , wherein a refractive index of the third color material is less than a refractive index of the first color filter and is less than a refractive index of the second color filter.

16. The display device of claim 10 , wherein a height of the third color material is less than about 0.19 times a width of the third color material.

17. The display device of claim 10 , wherein a height of the third color material is greater than a height of a central portion of the first color filter and is greater than a height of a central portion of the second color filter.

18. The display device of claim 1 , further comprising a color conversion-transmission layer between the encapsulation layer and the first and second color filters, and comprising:
a first color conversion part configured to convert light emitted from one of the first light-emitting diode and the second light-emitting diode into light of a different color; and
a light blocking partition wall surrounding the first color conversion part.

19. The display device of claim 18 , wherein the first end portion of the first color filter and the first end portion of the second color filter overlap the light blocking partition wall.

20. The display device of claim 18 , wherein the gap between the first end portion of the first color filter and the first end portion of the second color filter overlaps the light blocking partition wall.

Assignees

• Samsung Display Co Ltd

Inventors

• Ryu Yunha
• Kim Hyojoon
• Park Kisoo
• Kwon Junghyun
• Yoon Seontae
• Lee Hyeseung

Classifications

• H10K71/00

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

• H10K59/8792

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

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10K50/865

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