Display device and method of fabricating display device

Patent metadata

Field	Value
Publication number	US-2025133929-A1
Application number	US-202418652684-A
Country	US
Kind code	A1
Filing date	May 1, 2024
Priority date	Oct 19, 2023
Publication date	Apr 24, 2025
Grant date	—

Abstract

Provided is a display device, including sub-pixels formed on a base layer, and including a color conversion layer in a first sub-pixel area and including a quantum-dot, a first scattering layer in a second sub-pixel area and including a first scatterer, and a second scattering layer in the third sub-pixel area and including a second scatterer, a first color filter in the first sub-pixel area, a second color filter in the second sub-pixel area, and a third color filter in the third sub-pixel area, wherein emitted light from a light emitting element includes light of the second color and light of the third color, and wherein colors of light passing through the first scattering layer and the second scattering layer are substantially unchanged by the first scattering layer and the second scattering layer.

First claim

What is claimed is:

1 . A display device, comprising:
sub-pixels formed on a base layer, and comprising: a first sub-pixel forming a first sub-pixel area and configured to provide light of a first color; a second sub-pixel forming a second sub-pixel area and configured to provide light of a second color; and a third sub-pixel forming a third sub-pixel area and configured to provide light of a third color, the sub-pixels comprising:
a display layer comprising a light emitting element on the base layer;
a light controlling layer on the display layer, and comprising:
a color conversion layer in the first sub-pixel area and comprising a quantum-dot;
a first scattering layer in the second sub-pixel area and comprising a first scatterer; and
a second scattering layer in the third sub-pixel area and comprising a second scatterer; and

a color filter layer on the light controlling layer, and comprising a first color filter in the first sub-pixel area, a second color filter in the second sub-pixel area, and a third color filter in the third sub-pixel area,
wherein emitted light from the light emitting element comprises light of the second color and light of the third color, and at least a portion of the emitted light is emitted through the light controlling layer and the color filter layer, and wherein colors of light passing through the first scattering layer and the second scattering layer are substantially unchanged by the first scattering layer and the second scattering layer.

2 . The display device according to claim 1 , further comprising a capping layer, at least a portion of the capping layer being configured to passivate the color conversion layer,
wherein a first portion of the capping layer is on the color conversion layer in the first sub-pixel area, and a second portion of the capping layer is under the first scattering layer and the second scattering layer respectively in the second sub-pixel area and the third sub-pixel area.

3 . The display device according to claim 2 , further comprising an upper layer on the color filter layer, and comprising an upper substrate,
wherein the color filter layer and the light controlling layer are sequentially layered below the upper substrate, and wherein a filler layer is between the display layer and the color conversion layer, the first scattering layer, and the second scattering layer.

4 . The display device according to claim 2 , further comprising an upper layer on the color filter layer, and comprising an upper substrate,
wherein the light controlling layer is on the display layer, and wherein a filler layer is between the color filter layer and the color conversion layer, the first scattering layer, and the second scattering layer.

5 . The display device according to claim 2 , further comprising an upper layer on the color filter layer, and comprising an upper film,
wherein the light controlling layer and the color filter layer are successively layered on the display layer.

6 . The display device according to claim 1 , wherein the color conversion layer has a first thickness,
wherein the first scattering layer has a second thickness, wherein the second scattering layer has a third thickness, wherein the first thickness is greater than each of the second thickness or the third thickness, and wherein the second thickness is substantially equal to the third thickness.

7 . The display device according to claim 1 , wherein the first scatterer and the second scatterer are comprised in a range from about 1.5 wt % (weight percentage) to about 8.5 wt % with respect to the first scattering layer and the second scattering layer, respectively.

8 . The display device according to claim 1 , wherein a size of the first scatterer is greater than a size of the second scatterer.

9 . The display device according to claim 1 , wherein the first scatterer is included at a first weight ratio with respect to the first scattering layer,
wherein the second scatterer is included at a second weight ratio with respect to the second scattering layer, and wherein the first weight ratio is greater than the second weight ratio.

10 . The display device according to claim 1 , wherein the first scattering layer comprises one or more scatterers having a same composition ratio as the first scatterer and a different size than the first scatterer, and
wherein the second scatter layer comprises one or more scatterers having a same composition ratio as the second scatterer and a different size than the second scatterer.

11 . The display device according to claim 1 , wherein the color filter layer further comprises an optical layer having a refractive index less than a refractive index of the color conversion layer, the optical layer being disposed between the light controlling layer and the first color filter, the second filter, and the third color filter layer, and
wherein, among the first sub-pixel area, the second sub-pixel area, and the third sub-pixel area, only the first sub-pixel area comprises the optical layer.

12 . The display device according to claim 1 , further comprising a filler scattering layer in the second sub-pixel area and the third sub-pixel area, the filler scattering layer overlapping with the first scattering layer and the second scattering layer in a thickness direction, and comprising a filler material and a scattering material.

13 . The display device according to claim 1 , further comprising a bank, wherein at least a portion of the bank encloses the first sub-pixel area, and extends in a thickness direction.

14 . The display device according to claim 13 , wherein the bank is not between the second sub-pixel area and the third sub-pixel area, and
wherein the display device further comprising a black matrix layer, at least a portion of is the black matrix layer being between the second sub-pixel area and the third sub-pixel area, the black matrix layer penetrating between the first scattering layer and the second scattering layer.

15 . The display device according to claim 13 , wherein the bank is formed around all sides of the first sub-pixel area in a plan view, and is not formed around at least a portion of each of the second sub-pixel area and the third sub-pixel area.

16 . The display device according to claim 15 ,
wherein at least one side of the second sub-pixel area includes an open edge on which the bank is not formed, and wherein the open edge is formed to be oriented in a direction away from the third sub-pixel area.

17 . The display device according to claim 13 , wherein the bank is formed around all sides of both the first sub-pixel area and the second sub-pixel area in a plan view, and is not formed around at least a portion of the third sub-pixel area.

18 . The display device according to claim 17 , further comprising a capping layer, at least a portion of the capping layer being configured to passivate the color conversion layer and the first scattering layer,
wherein a portion of the capping layer is in the third sub-pixel area between the second scattering layer and the third color filter.

19 . The display device according to claim 18 , wherein a thickness of the first scattering layer is greater than a thickness of the second scattering layer.

20 . The display device according to claim 13 , wherein the bank further comprises an isolated bank component, and
wherein the isolated bank component is between the second sub-pixel area and the third sub-pixel area.

21 .

Assignees

• Samsung Display Co Ltd

Inventors

• Joo Sun Kyu
• Shin Cheol
• Oh Keun Chan
• Yoon Ji Hwan
• Lee Seon Uk
• Lee Se Ho
• Ji Woo Man
• Jin You Young
• Hwang Jae Hoon
• Hwang Tae Hyung

Classifications

• H10W90/00

  Package configurations · CPC title

• H10K71/00

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

• H10K50/854

  comprising scattering means · CPC title

• H10K59/50

  OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements · CPC title

• H10K59/877

  comprising scattering means · CPC title