Display device

Patent metadata

Field	Value
Publication number	US-12120935-B2
Application number	US-202117381119-A
Country	US
Kind code	B2
Filing date	Jul 20, 2021
Priority date	Oct 28, 2020
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A display device includes a first substrate, a pixel structure, a first optical filter, a first-color filter, a second optical filter, a second-color filter, and a second substrate. The pixel structure is disposed between the first substrate and each of the optical filters. The first-color filter is disposed on the first optical filter and has a first refractive index. The second optical filter is spaced from the first optical filter and includes a second-color pigment. The second-color filter is disposed on the second optical filter and has a second refractive index. The second substrate is disposed on the first color filter and the second color filter and has a third refractive index. A difference between the third refractive index and the second refractive index is less than a difference between the third refractive index and the first refractive index.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a pixel structure disposed on the first substrate;
a first optical filter disposed on the pixel structure;
a first color filter disposed on the first optical filter, having a first color, and having a first refractive index;
a second optical filter disposed on the pixel structure, spaced from the first optical filter, and including a pigment having a second color;
a second color filter disposed on the second optical filter, having the second color, and having a second refractive index; and
a second substrate disposed on the first color filter and the second color filter,
wherein the second substrate has a third refractive index, and
wherein a difference between the third refractive index and the second refractive index is less than a difference between the third refractive index and the first refractive index color,
wherein at least one end of the first color filter overlaps at least one end of the second color filter to form an overlapping portion, and
wherein a light blocking member is disposed between the overlapping portion and the pixel structure.

2. The display device of claim 1 , wherein the second color is a blue color.

3. The display device of claim 1 , wherein the second optical filter displays the second color, and wherein the first optical filter does not include any pigment having the first color.

4. The display device of claim 1 , wherein each of the first refractive index and the second refractive index is greater than the third refractive index.

5. The display device of claim 1 , wherein the pigment having the second color includes a blue pigment and a dye having the second color.

6. The display device of claim 1 , further comprising:
a third optical filter disposed on the pixel structure and spaced from each of the first optical filter and the second optical filter; and
a third color filter disposed on the third optical filter, having a third color, and having a fourth refractive index.

7. The display device of claim 6 , wherein the fourth refractive index is greater than the third refractive index, and wherein the fourth refractive index is greater than the second refractive index.

8. The display device of claim 6 , wherein the second optical filter is configured to transmit a first part of light of the second color, wherein the first optical filter is configured to convert a second part of the light of the second color into light of the first color, and wherein the third optical filter is configured to convert a third part of the light of the second color into light of the third color.

9. The display device of claim 6 , further comprising a light blocking member disposed on the pixel structure, wherein the light blocking member includes a first hole, a second hole, and a third hole, wherein the first optical filter is at least partially disposed in the first hole, wherein the second optical filter is at least partially disposed in the second hole, and wherein the third optical filter is at least partially disposed in the third hole.

10. The display device of claim 6 , wherein the pixel structure includes:
a first pixel electrode disposed between the first optical filter and the first substrate;
a second pixel electrode disposed between the second optical filter and the first substrate;
a third pixel electrode disposed between the third optical filter and the first substrate;
a light emitting layer disposed on the first pixel electrode, the second pixel electrode, and the third pixel electrode; and
a common electrode disposed on the light emitting layer.

11. The display device of claim 10 , wherein the second substrate is disposed directly on the first color filter, the second color filter, and the third color filter.

12. The display device of claim 11 , wherein the second color filter overlaps the second optical filter and includes a first opening and a second opening, and wherein the first opening and second opening respectively expose a first surface portion of the second substrate and a second surface portion of the second substrate that overlap the first optical filter and the third optical filter, respectively.

13. The display device of claim 12 , wherein the first color filter is partially disposed in the first opening and includes a third opening and a fourth opening, wherein the third opening exposes a portion of the third optical filter that overlaps the second surface portion of the second substrate, and wherein the fourth opening exposes a surface portion of the second color filter that overlaps the second optical filter.

14. The display device of claim 13 , wherein the third color filter is partially disposed in the second opening, is partially disposed in the third opening, and includes a fifth opening and a sixth opening, wherein the fifth opening exposes a portion of the first optical filter that overlaps the first surface portion of the second substrate, and wherein the sixth opening exposes a portion of the second optical filter that overlaps the surface portion of the second color filter.

15. The display device of claim 1 , wherein the pixel structure is configured to emit a light having the second color.

16. A display device comprising:
a first substrate;
a pixel structure disposed on the first substrate;
a first optical filter disposed on the pixel structure;
a first color filter overlapping the first optical filter and having a first color;
a first optical filter member disposed between the first optical filter and the first color filter and including a pigment having the first color;
a second optical filter disposed on the pixel structure, spaced apart from the first optical filter, and including a pigment having a second color; and
a second color filter disposed on the second optical filter and having the second color,
wherein at least one end of the first color filter overlaps at least one end of the second color filter to form an overlapping portion, and
wherein a light blocking member is disposed between the overlapping portion and the pixel structure.

17. The display device of claim 16 , further comprising:
a third optical filter disposed on the pixel structure and spaced from each of the first optical filter and the second optical filter;
a third color filter overlapping the third optical filter and having a third color; and
a second optical filter member disposed between the third optical filter and the third color filter and including a pigment having the third color, wherein the first optical filter member displays the first color, wherein the second optical filter member displays the third color, and wherein the second optical filter displays the second color.

18. The display device of claim 17 , further comprising a light blocking member disposed on the pixel structure, wherein the light blocking member includes a first hole, a second hole, and a third hole, wherein the first optical filter member is at least partially disposed in the first hole, wherein the second optical filter is at least partially disposed in the second hole, and wherein the second optical filter member is at least partially disposed in the third hole.

19. The display device of claim 17 , further comprising a second substrate disposed on the first color filter, the second color filter, and the third color filter, wherein the second color filter overlaps the second optical filter and includes a first opening and a second opening, wherein the first opening and the second opening respectively expose a first surfa

Assignees

• Samsung Display Co Ltd

Inventors

• Song Inseok
• Lee Gak Seok
• Oh Keunchan
• Kim Byung-Chul
• Ryu Jang Wi
• Ji Halim

Classifications

• H10K59/8792

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

• H10K59/38 Primary

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

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K71/50

  Forming devices by joining two substrates together, e.g. lamination techniques · CPC title