Optical filter substrate and display device including the same

Patent metadata

Field	Value
Publication number	US-11672154-B2
Application number	US-202117242387-A
Country	US
Kind code	B2
Filing date	Apr 28, 2021
Priority date	Oct 26, 2018
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A display device includes an optical filter substrate including: a substrate; a first color filter on the substrate; a second color filter on the substrate, the second color filter spaced apart from the first color filter; a first color conversion element on the first color filter, the first color conversion element converting incident light into light of a first color; a second color conversion element on the second color filter, the second color conversion element converting the incident light into light of a second color; and a black matrix located between the first color conversion element and the second color conversion element, and between the first color filter and the second color filter.

First claim

What is claimed is:

1. A display comprising:
a substrate;
a plurality of diodes on the substrate;
an encapsulation layer covering the plurality of diodes;
a color filter layer on the encapsulation layer;
a first color conversion element disposed between the encapsulation layer and the color filter layer, the first color conversion element converting incident light into light of a first color;
a second color conversion element disposed between the encapsulation layer and the color filter layer, the second color conversion element converting incident light into light of a second color;
a refractive layer disposed between the color filter layer and the first and second color conversion elements, the refractive layer having a refractive index less than those of the first and second color conversion elements;
a first barrier layer disposed between the color filter layer and the first and second color conversion elements;
a black matrix disposed between the first color conversion element and the second color conversion element; and
a coating layer disposed between the refractive layer and the encapsulation layer.

2. The display device of claim 1 , wherein the coating layer comprises an organic material.

3. The display device of claim 1 , wherein the refractive index of the refractive layer is less than about 1.4.

4. The display device of claim 1 , wherein the coating layer comprises a first surface facing the substrate and a second surface opposite to the first surface, the second surface of the coating layer being substantially flat.

5. The display device of claim 4 , wherein the encapsulation layer comprises:
a first inorganic encapsulation layer;
a second inorganic encapsulation layer; and
an organic encapsulation layer between the first inorganic encapsulation layer and the second inorganic encapsulation layer, wherein an upper surface of the second inorganic encapsulation layer faces the second surface of the coating layer.

6. The display device of claim 1 , further comprising:
a second barrier layer between the first and second color conversion elements and the coating layer.

7. The display device of claim 6 , wherein the first barrier layer and the second barrier layer each comprise at least one selected from silicon nitride, silicon oxynitride, and silicon oxide.

8. The display device of claim 7 , wherein the black matrix contacts parts of the second barrier layer.

9. The display device of claim 1 , wherein the color filter layer comprises:
a first color filter element overlapping the first color conversion element; and
a second color filter element overlapping the second color conversion element, wherein the first color filter element and the second color filter have different colors from each other.

10. The display device of claim 1 , wherein:
the plurality of diodes each emits light of a third color, and
the first color conversion element converts the light of the third color into light of the first color, and the second color conversion element converts the light of the third color into light of the second color.

11. The display device of claim 10 , further comprising:
a transmission element arranged adjacent to the first color conversion element or the second color conversion element, wherein the transmission element transmits the light of the third color and includes scattering particles.

12. The display device of claim 11 , wherein the scattering particles of the transmission element comprise titanium oxide.

13. The display device of claim 1 , wherein the plurality of diodes comprises a plurality of organic light-emitting diode or a plurality of inorganic light-emitting diode.

Assignees

• Samsung Display Co Ltd

Inventors

• JUNG Euisuk
• Kim Jihyun
• Park Junhong
• Chun Jun
• Kang Hoon
• Park Jeongmin

Classifications

• H10W90/00

  Package configurations · CPC title

• G09F9/335

  being organic light emitting diodes [OLED] · CPC title

• G02B5/201

  in the form of arrays · CPC title

• H10K71/50

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

• H10K59/38 Primary

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