Organic light-emitting device having high contrast ratio

Patent metadata

Field	Value
Publication number	US-10468635-B2
Application number	US-201815764792-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Jan 31, 2018
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A high contrast ratio organic light-emitting display device includes a first and a second substrate disposed oppositely, a blue light-emitting layer disposed at an inner side of the first substrate, a color conversion layer disposed at an inner side of the second substrate and multiple spacer plates disposed between the first substrate and the second substrate. Wherein the color conversion layer includes multiple sub-conversion units which are arranged as a matrix, disposed separately and capable of correspondingly generating different lights. The spacer plate blocks adjacent two sub-conversion units. The present invention utilizes the spacer plate to block interference of the blue light at sub-conversion units to increase the contrast ratio of the display device. Besides, making the spacer plate to be reflective, the blue light emitted to each sub-conversion unit is more concentrated in order to increase the contrast ratio of different sub-conversion units.

First claim

What is claimed is:

1. A high contrast ratio organic light-emitting display device, comprising:
a first substrate and a second substrate disposed oppositely;
a blue light-emitting layer disposed at an inner side of the first substrate;
a color conversion layer disposed at an inner side of the second substrate;
multiple spacer plates disposed between the first substrate and the second substrate;
wherein the color conversion layer includes multiple sub-conversion units which are arranged as a matrix, disposed separately and capable of correspondingly generating a red light, a green light and a blue light after being excited by a blue light;
light colors of adjacent two sub-conversion units after being excited by a blue light are different; and
the spacer plate is blocked between adjacent two sub-conversion unit in order to block a blue light emits to one sub-conversion unit from entering to the other adjacent sub-conversion unit.

2. The high contrast ratio organic light-emitting display device according to claim 1 , wherein a surface of the spacer plate is a reflective surface.

3. The high contrast ratio organic light-emitting display device according to claim 1 , wherein the spacer plate includes an upper portion and a lower portion disposed oppositely and separately, the upper portion is extended to a space between adjacent two sub-conversion units, and the lower portion abuts the blue light-emitting layer or the first substrate.

4. The high contrast ratio organic light-emitting display device according to claim 3 , wherein a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function.

5. The high contrast ratio organic light-emitting display device according to claim 4 , wherein a focus of the surface of the lower portion is located on the blue light-emitting layer.

6. The high contrast ratio organic light-emitting display device according to claim 1 , wherein the spacer plate includes a lower portion that abuts the blue light-emitting layer or the first substrate, and a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function and a focus of the surface of the lower portion is located on the blue light-emitting layer.

7. The high contrast ratio organic light-emitting display device according to claim 1 , wherein one terminal of the spacer plate is extended to be abutted to the inner surface of the second substrate.

8. The high contrast ratio organic light-emitting display device according to claim 7 , wherein the other terminal of the spacer plate abuts the blue light-emitting layer.

9. The high contrast ratio organic light-emitting display device according to claim 8 , wherein a surface of the spacer plate is a reflective surface.

10. The high contrast ratio organic light-emitting display device according to claim 8 , wherein the spacer plate includes an upper portion and a lower portion disposed oppositely and separately, the upper portion is extended to a space between adjacent two sub-conversion units, and the lower portion abuts the blue light-emitting layer or the first substrate.

11. The high contrast ratio organic light-emitting display device according to claim 10 , wherein a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function.

12. The high contrast ratio organic light-emitting display device according to claim 11 , wherein a focus of the surface of the lower portion is located on the blue light-emitting layer.

13. The high contrast ratio organic light-emitting display device according to claim 8 , wherein the spacer plate includes a lower portion that abuts the blue light-emitting layer or the first substrate, and a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function and a focus of the surface of the lower portion is located on the blue light-emitting layer.

14. The high contrast ratio organic light-emitting display device according to claim 7 , wherein the spacer plate is perpendicular to the second substrate.

15. The high contrast ratio organic light-emitting display device according to claim 7 , wherein the blue light-emitting layer includes multiple brick-shaped sub light-emitting units arranged as a matrix, each sub light-emitting unit is right opposite to one sub-conversion unit, one terminal of the spacer plate abuts the first substrate after passing through a space between two sub light-emitting units.

16. The high contrast ratio organic light-emitting display device according to claim 15 , wherein a surface of the spacer plate is a reflective surface.

17. The high contrast ratio organic light-emitting display device according to claim 15 , wherein the spacer plate includes an upper portion and a lower portion disposed oppositely and separately, the upper portion is extended to a space between adjacent two sub-conversion units, and the lower portion abuts the blue light-emitting layer or the first substrate.

18. The high contrast ratio organic light-emitting display device according to claim 17 , wherein a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function.

19. The high contrast ratio organic light-emitting display device according to claim 18 , wherein a focus of the surface of the lower portion is located on the blue light-emitting layer.

20. The high contrast ratio organic light-emitting display device according to claim 15 , wherein the spacer plate includes a lower portion that abuts the blue light-emitting layer or the first substrate, and a surface of the lower portion of the spacer plate is a parabolic surface having a concave structure and a reflective function and a focus of the surface of the lower portion is located on the blue light-emitting layer.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Jin Xiang
• Yuan Chaoyu

Classifications

• H10W90/00

  Package configurations · CPC title

• H01L27/3283

  Electricity · mapped topic

• H01L51/5271

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic

• H01L25/0756

  Electricity · mapped topic