Display device including quantum dot color filter

Patent metadata

Field	Value
Publication number	US-11237426-B2
Application number	US-202016800073-A
Country	US
Kind code	B2
Filing date	Feb 25, 2020
Priority date	Feb 22, 2016
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A display apparatus includes a blue light blocking layer to block a blue light which is not converted by a color conversion layer, and a reflection preventing layer over the blue light blocking layer to prevent reflection of external light incident thereon.

First claim

What is claimed is:

1. A display apparatus, comprising:
a panel; and
a quantum dot color filter on the panel,
wherein the quantum dot color filter includes:
a first color conversion layer in a first pixel area and including a plurality of quantum dots to convert incident light into a first color light;
a second color conversion layer in a second pixel area and including a plurality of quantum dots to convert incident light into a second color light;
a blue light blocking layer including a first blue light blocking portion over the first color conversion layer to block emission of a blue light of the incident light which is not converted by the first color conversion layer, and a second blue light blocking portion over the second color conversion layer to block emission of the blue light of the incident light which is not converted by the second color conversion layer;
a layer including a first portion over the first color conversion layer to prevent reflection of external light incident thereon and to transmit the first color light from the first color conversion layer therethrough, and a second portion over the second color conversion layer to prevent reflection of external light incident thereon and to transmit the second color light from the second color conversion layer therethrough, the first portion being spaced apart from the second portion; and
a partition comprising a black matrix and disposed between the first color conversion layer and the second color conversion layer, the first color conversion layer and the second color conversion layer being spaced apart from one another.

2. The display apparatus as claimed in claim 1 , wherein the layer prevents reflection of blue light of external light incident thereon.

3. The display apparatus as claimed in claim 1 , further comprising:
a transparent substrate, wherein
the first portion of the layer is between the transparent substrate and the first blue light blocking portion, and the second portion of the layer is between the transparent substrate and the second blue light blocking portion.

4. The display apparatus as claimed in claim 1 , wherein the layer includes a plurality of stacked layers that have different refractive indices from one another.

5. The display apparatus as claimed in claim 4 , wherein the refractive indices of the plurality of stacked layers increase towards the blue light blocking layer.

6. The display apparatus as claimed in claim 4 , further comprising:
a transparent substrate disposed between the layer and the blue light blocking layer.

7. The display apparatus as claimed in claim 1 , wherein the blue light blocking layer includes a plurality of alternately stacked first and second layers that have different refractive indices from one another.

8. The display apparatus as claimed in claim 1 , wherein a transmittance of the blue light blocking layer with respect to the blue light is equal to or less than 1%.

9. The display apparatus as claimed in claim 1 , wherein the partition is further disposed between the first blue light blocking portion and the second blue light blocking portion.

10. A display apparatus, comprising:
a panel;
a quantum dot color filter on the panel; and
a substrate on the quantum dot color filter, wherein
the quantum dot color filter includes:
a first color conversion layer in a first pixel area and including a plurality of quantum dots to convert incident light into a first color light;
a second color conversion layer in a second pixel area and including a plurality of quantum dots to convert incident light into a second color light;
a blue light blocking layer including a first blue light blocking portion over the first color conversion layer to block emission of a blue light of the incident light which is not converted by the first color conversion layer, and a second blue light blocking portion over the second color conversion layer to block emission of the blue light of the incident light which is not converted by the second color conversion layer;
a layer including a first portion arranged over a center of the first color conversion layer and between the substrate and the first color conversion layer and having stacked layers that have different refractive indices from one another, and a second portion arranged over a center of the second color conversion layer and between the substrate and the second color conversion layer and having stacked layers that have different refractive indices from one another, the first portion being spaced apart from the second portion; and
a partition disposed between the first color conversion layer and the second color conversion layer, the first color conversion layer and the second color conversion layer being spaced apart from one another.

11. The display apparatus as claimed in claim 10 , wherein the refractive indices of the stacked layers of the first portion increase towards first color conversion layer, and the refractive indices of the stacked layers of the second portion increase towards second color conversion layer.

12. The display apparatus as claimed in claim 10 , wherein the partition is further disposed between the first blue light blocking portion and the second blue light blocking portion.

13. The display apparatus as claimed in claim 10 , wherein the stacked layers of the first portion and the stacked layers of the second portion comprise silicon oxide.

14. The display apparatus as claimed in claim 10 , wherein
the first color portion transmits the first color light from the first color conversion layer therethrough, and
the second color portion transmits the second color light from the second color conversion layer therethrough.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeon Sanghyun
• Bae Chulmin
• Jeon Wooseok

Classifications

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2203/055

  wavelength filtering · CPC title

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• G02F2201/38

  Anti-reflection arrangements · CPC title