Color-converting substrate and display device including the same

Patent metadata

Field	Value
Publication number	US-2023109521-A1
Application number	US-202218075274-A
Country	US
Kind code	A1
Filing date	Dec 5, 2022
Priority date	Feb 28, 2020
Publication date	Apr 6, 2023
Grant date	—

Abstract

A color-converting substrate includes a color-converting part including a wavelength-converting particle configured to change a wavelength of an incident light to emit a light having a color different from the incident light, a color filter pattern filtering the light emitted from the color-converting part, and a light-reflective layer disposed between the color-converting part and the color filter pattern to selectively reflect a light having a wavelength same as the wavelength of the incident light.

First claim

What is claimed is:

1 . A display device comprising:
a color-converting part including a wavelength-converting particle configured to change a wavelength of an incident light to emit a light having a color different from the incident light; a low refractive layer disposed on the color-converting part and having a refractive index smaller than a refractive index of the color-converting part; a color filter pattern filtering the light emitted from the color-converting part; and a light-reflective layer disposed between the color-converting part and the color filter pattern to selectively reflect a light having a wavelength same as the wavelength of the incident light.

2 . The display device of claim 1 , wherein the light-reflective layer covers a light-exiting surface and a side surface of the color-converting part.

3 . The display device of claim 1 , wherein the light-reflective layer has a stacked structure including a plurality of layers having different refractive indexes.

4 . The display device of claim 1 , wherein the light-reflective layer includes a wire-grid pattern.

5 . The display device of claim 1 , wherein the light-reflective layer includes a nano-particle including silver.

6 . The display device of claim 5 , wherein the nano-particle includes an oxide core and a metal shell including silver.

7 . The display device of claim 1 , further comprising a compensation part configured to transmit an incident light without changing a wavelength of the incident light, wherein the compensation part does not overlap the light-reflective layer.

8 . The display device of claim 7 , wherein the incident light is a blue light.

9 . The display device of claim 1 , wherein the wavelength-converting particle includes a quantum dot.

10 . The display device of claim 1 , wherein the color-converting part further includes a scattering particle.

11 . The display device of claim 1 , wherein the refractive index of the low refractive layer is equal to or less than 1.3.

12 . The display device of claim 1 , wherein the low refractive layer includes a hollow particle dispersed in a resin matrix.

13 . The display device of claim 1 , wherein the low refractive layer is disposed between the light-reflective layer and the color filter pattern.

14 . The display device of claim 1 , further comprising a compensation part configured to transmit an incident light without changing a wavelength of the incident light, wherein the compensation part does not overlap the light-reflective layer, wherein the low refractive layer contacts the compensation part.

15 . The display device of claim 1 , wherein a portion of the low refractive layer is disposed between color-converting parts adjacent to each other.

16 . The display device of claim 1 , further comprising a partition wall including openings in which the color-converting part is provided, wherein the low refractive layer is disposed on the partition wall.

17 . The display device of claim 1 , further comprising an array of pixels.

18 . The display device of claim 17 , further comprising an encapsulation layer covering the array of pixels.

19 . The display device of claim 17 , wherein the pixels each includes a light-emitting element.

20 . The display device of claim 17 , further comprising a light-blocking matrix disposed on the low refractive layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Hyunbae
• Lee Seunghee
• Kim Wal Jun
• Ahn Kiwan
• Yoon Joosun

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/878

  comprising reflective means · CPC title

• H10K59/877

  comprising scattering means · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title