Color conversion panel with improved light efficiency and display device including the same

Patent metadata

Field	Value
Publication number	US-12007647-B2
Application number	US-202017310306-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	May 9, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A display device includes: a display panel; and a color conversion panel overlapping with the display panel. The color conversion panel includes: a substrate; a first color conversion pattern on the substrate; a second color conversion pattern on the substrate, and partially overlapping with the first color conversion pattern; a first reflective partition wall between the first color conversion pattern and the second color conversion pattern; a first color filter between the substrate and the first color conversion pattern; and a second color filter between the substrate and the second color conversion pattern.

First claim

The invention claimed is:

1. A display device, comprising:
a display panel; and
a color conversion panel overlapping with the display panel, the color conversion panel comprising:
a substrate;
a first color conversion pattern on the substrate;
a second color conversion pattern on the substrate, and partially overlapping with the first color conversion pattern;
a transmission pattern on the substrate, and partially overlapping with a portion of the first color conversion pattern that is adjacent thereto and the second color conversion pattern;
a first reflective partition wall between the first color conversion pattern and the second color conversion pattern;
a first color filter between the substrate and the first color conversion pattern; and
a second color filter between the substrate and the second color conversion pattern.

2. The display device of claim 1 , wherein the first reflective partition wall covers a side of the first color conversion pattern.

3. The display device of claim 2 , wherein the second color conversion pattern does not contact the first color conversion pattern.

4. The display device of claim 1 , wherein the second color conversion pattern contacts the first color conversion pattern underneath the first reflective partition wall.

5. The display device of claim 1 , wherein the color conversion panel further comprises:
a light blocking pattern partially overlapping with the first color conversion pattern and the second color conversion pattern between the first color conversion pattern and the second color conversion pattern.

6. The display device of claim 5 , wherein the light blocking pattern is located between the substrate and the first color conversion pattern, and between the substrate and the second color conversion pattern.

7. The display device of claim 5 , wherein the light blocking pattern is located on the first color conversion pattern and the second color conversion pattern.

8. The display device of claim 5 , wherein a width of the light blocking pattern is greater than a width of an area in which the first color conversion pattern overlaps with the second color conversion pattern.

9. The display device of claim 1 , wherein the color conversion panel further comprises:
a second reflective partition wall between the portion of the first color conversion pattern and the transmission pattern, and between the second color conversion pattern and the transmission pattern.

10. The display device of claim 9 , wherein the second reflective partition wall covers a side of the transmission pattern.

11. The display device of claim 10 , wherein the transmission pattern does not contact the portion of the first color conversion pattern and the second color conversion pattern.

12. The display device of claim 9 , wherein the transmission pattern contacts the portion of the first color conversion pattern and the second color conversion pattern underneath the second reflective partition wall.

13. The display device of claim 1 ,
wherein the display panel is configured to emit a first color light to the color conversion panel,
wherein the first color conversion pattern is configured to convert the first color light into a second color light,
wherein the second color conversion pattern is configured to convert the first color light into a third color light, and
wherein the transmission pattern is configured to transmit the first color light.

14. The display device of claim 1 , wherein each of the first color conversion pattern and the second color conversion pattern comprises at least one of a quantum dot and a phosphor.

15. A color conversion panel, comprising:
a substrate;
a first color conversion pattern on the substrate, and configured to convert an incident light into a first color light;
a second color conversion pattern on the substrate, and configured to convert the incident light into a second color light, the second color conversion pattern partially overlapping with the first color conversion pattern;
a transmission pattern on the substrate, and configured to transmit the incident light, the transmission pattern partially overlapping with a portion of the first color conversion pattern that is adjacent thereto;
a first reflective partition wall between the first color conversion pattern and the second color conversion pattern;
a first color filter between the substrate and the first color conversion pattern, and configured to block the incident light that is not converted by the first color conversion pattern; and
a second color filter between the substrate and the second color conversion pattern, and configured to block the incident light that is not converted by the second color conversion pattern.

16. The color conversion panel of claim 15 , further comprising:
a second reflective partition wall between the portion of the first color conversion pattern and the transmission pattern.

17. The color conversion panel of claim 15 , further comprising:
a light blocking pattern partially overlapping with the first color conversion pattern and the second color conversion pattern between the first color conversion pattern and the second color conversion pattern, and partially overlapping with the portion of the first color conversion pattern and the transmission pattern between the portion of the first color conversion pattern and the transmission pattern.

18. The color conversion panel of claim 17 , wherein the light blocking pattern is located between the substrate and the first color conversion pattern, between the substrate and the second color conversion pattern, and between the substrate and the transmission pattern.

19. The color conversion panel of claim 17 , wherein the light blocking pattern is located on the first color conversion pattern, the second color conversion pattern, and the transmission pattern.

20. A color conversion panel, comprising:
a substrate;
a first color conversion pattern on the substrate, and configured to convert an incident light into a first color light;
a second color conversion pattern on the substrate, and configured to convert the incident light into a second color light, the second color conversion pattern being spaced apart from and not overlapping with the first color conversion pattern;
a first reflective partition wall covering opposite sides of the first color conversion pattern;
a second reflective partition wall covering opposite sides of the second color conversion pattern;
a first color filter between the substrate and the first color conversion pattern, and configured to block the incident light that is not converted by the first color conversion pattern; and
a second color filter between the substrate and the second color conversion pattern, and configured to block the incident light that is not converted by the second color conversion pattern.

21. The color conversion panel of claim 20 , further comprising:
a transmission pattern on the substrate, and configured to transmit the incident light, the transmission pattern being spaced apart from the first color conversion pattern and the second color conversion pattern.

22. The color conversion panel of claim 21 , further comprising:
a third reflective partition wall covering opposite sides of the transmission pattern.

23. The color conversion panel of claim 22 , further comprising:
a light blocking pattern partially overlapping with the first color conversion pattern and the second color co

Assignees

• Samsung Display Co Ltd

Inventors

• Jang Chang-Soon
• Kim Byung-Chul
• Kim In-Ok
• Seong Jae-Min
• Song In-Seok
• Lee Gak-Seok
• Jang Ji-Eun
• Joo Sun-Kyu
• Ji Ha-Lim

Classifications

• H10K59/8792

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

• H10K59/878

  comprising reflective means · CPC title

• G02F1/133614 Primary

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title