Quantum dot color filter and display device including the same

Patent metadata

Field	Value
Publication number	US-10365509-B2
Application number	US-201715438034-A
Country	US
Kind code	B2
Filing date	Feb 21, 2017
Priority date	Feb 22, 2016
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

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 backlight;
a liquid crystal panel on the backlight; and a quantum dot color filter on the liquid crystal 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; and
a reflection preventing layer including a first reflection preventing portion over the first blue light blocking portion 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 reflection preventing portion on the second blue light blocking portion to prevent reflection of external light incident thereon and to transmit the second color light from the second color conversion layer therethrough, and
wherein the first reflection preventing portion and the second reflection preventing portion are spaced apart from one another.

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

3. The display apparatus as claimed in claim 1 , wherein:
the reflection preventing layer includes a plurality of stacked layers that have different refractive indices from one another; and
the refractive indices of the plurality of stacked layers increase towards the blue light blocking layer.

4. The display apparatus as claimed in claim 1 , wherein the backlight emits blue light to be blocked by the blue light blocking layer.

5. The display apparatus as claimed in claim 4 , wherein the blue light blocking layer includes a plurality of alternately stacked first and second layers that have different refractive indices from one another.

6. The display apparatus as claimed in claim 4 , wherein a transmittance of the blue light blocking layer with respect to the blue light emitted from the backlight is equal to or less than 1%.

7. The display apparatus as claimed in claim 1 , wherein the quantum dot color filter further includes a dispersion material layer provided in a third pixel area.

8. The display apparatus as claimed in claim 7 , wherein the reflection preventing layer further includes a third reflection preventing portion over the dispersion material layer to prevent reflection of external light incident from the outside thereof.

9. The display apparatus as claimed in claim 1 , further comprising:
a transparent substrate on the quantum dot color filter,
wherein the first reflection preventing portion of the reflection preventing layer is between the transparent substrate and the first blue light blocking portion, and the second reflection preventing portion of the reflection preventing layer is between the transparent substrate and the second blue light blocking portion.

10. The display apparatus as claimed in claim 1 , further comprising:
a transparent substrate on the quantum dot color filter,
wherein the transparent substrate is between the first reflection preventing portion and the first blue light blocking portion, and the transparent substrate is between the second reflection preventing portion and the second blue light blocking portion.

11. A quantum dot color filter, comprising
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 on the first color conversion layer to block emission of a first blue light of the incident light which is not converted by the first color conversion layer, and a second blue light blocking portion on the second color conversion layer to block emission of the first blue light of the incident light which is not converted by the second color conversion layer; and
a reflection preventing layer including a first reflection preventing portion provided over the first blue light blocking portion to prevent reflection of external light and to transmit the first color light from the first color conversion layer therethrough, and a second reflection preventing portion provided over the second blue light blocking portion to prevent reflection of external light and to transmit the second color light from the second color conversion layer therethrough, and
wherein the first reflection preventing portion and the second reflection preventing portion are spaced apart from one another.

12. The quantum dot color filter as claimed in claim 11 , wherein the reflection preventing layer prevents reflection of a second blue light, different from the first blue light, of external light.

13. The quantum dot color filter as claimed in claim 11 , wherein:
the reflection preventing layer includes a plurality of stacked layers that have different refractive indices from one another; and
the refractive indices of the plurality of stacked layers increase towards the blue light blocking layer.

14. The quantum dot color filter as claimed in claim 11 , wherein the blue light blocking layer includes a plurality of first and second layers which are alternately stacked and have different refractive indices from one another.

15. The quantum dot color filter as claimed in claim 11 , wherein a transmittance of the blue light blocking layer with respect to the first blue light is equal to or less than 1%.

16. The quantum dot color filter as claimed in claim 11 , wherein the quantum dot color filter further includes a dispersion material layer in a third pixel area.

17. The quantum dot color filter as claimed in claim 16 , wherein the reflection preventing layer further includes a third reflection preventing portion disposed over the dispersion material layer to prevent reflection of external light incident.

18. The quantum dot color filter as claimed in claim 11 , further comprising:
a transparent substrate,
wherein the first reflection preventing portion of the reflection preventing layer is between the transparent substrate and the first blue light blocking portion, and the second reflection preventing portion of the reflection preventing layer is between the transparent substrate and the second blue light blocking portion.

19. The quantum dot color filter as claimed in claim 11 , further comprising:
a transparent substrate,
wherein the transparent substrate is between the first reflection preventing portion and the first blue light blocking portion, and the transparent substrate is between the second reflection preventing portion and the second blue light blocking portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeon Sanghyun
• Bae Chulmin
• Jeon Wooseok

Classifications

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F2201/38

  Anti-reflection arrangements · CPC title

• G02F2201/08

  light absorbing layer · CPC title

• G02F1/133617

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F1/133509

  Filters, e.g. light shielding masks · CPC title