Color filter and display apparatus including the same

Patent metadata

Field	Value
Publication number	US-11092841-B2
Application number	US-201916276675-A
Country	US
Kind code	B2
Filing date	Feb 15, 2019
Priority date	Sep 14, 2018
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A color filter includes a substrate including pixel areas and a light-shielding area which is disposed between adjacent pixels areas; and a color conversion layer which color-converts incident light of an incident color and emits color-converted light toward the substrate, the color conversion layer including a first color conversion pattern in a first pixel area among the pixel areas and with which the incident light of the incident color is converted into light of a first color; and a second color conversion pattern in a second pixel area among the pixel areas and with which the incident light of the incident color is converted into light of a second color; and a partition wall in the light-shielding area and between the first color conversion pattern and the second color conversion pattern, the partition wall including a light-scattering material which scatters light incident thereto.

First claim

What is claimed is:

1. A color filter comprising:
a substrate comprising a plurality of pixel areas and a light-shielding area which is disposed between adjacent pixel areas among the plurality of pixel areas;
a color conversion layer which converts incident light of an incident color and emits color-converted light toward the substrate, the color conversion layer comprising:
a first color conversion pattern in a first pixel area among the plurality of pixel areas and with which the incident light of the incident color is converted into light of a first color; and
a second color conversion pattern in a second pixel area among the plurality of pixel areas and with which the incident light of the incident color is converted into light of a second color; and

a partition wall in the light-shielding area and between the first color conversion pattern and the second color conversion pattern,
wherein the partition wall extends from between the first color conversion pattern and the second color conversion pattern and away from the substrate and comprises a light-scattering material which scatters light incident thereto.

2. The color filter of claim 1 , wherein within the color conversion layer:
the first color conversion pattern comprises first quantum dots which are excited by the incident light of the incident color and emit the light of the first color, and
the second color conversion pattern comprises second quantum dots which are excited by the incident light of the incident color and emit the light of the second color.

3. The color filter of claim 1 , further comprising:
a light-shielding layer between the substrate and the partition wall, the light-shielding layer corresponding to the light-shielding area of the substrate; and
a color filter layer between the substrate and the color conversion layer, the color filter layer comprising:
a first color filter pattern which corresponds to the first color conversion pattern and selectively transmits the light of the first color emitted from the first color conversion pattern; and
a second color filter pattern which corresponds to the second color conversion pattern and selectively transmits the light of the second color emitted from the second color conversion pattern.

4. The color filter of claim 1 , wherein the color conversion layer further comprises a transmission layer in a third pixel area spaced apart from the first pixel area and the second pixel area from among the plurality of pixel areas and through which the incident light of the incident color is transmitted.

5. The color filter of claim 4 , wherein the partition wall is between the transmission layer and the first color conversion pattern and between the transmission layer and the second color conversion pattern.

6. The color filter of claim 4 , further comprising:
a light-shielding layer between the substrate and the partition wall, the light-shielding layer corresponding to the light-shielding area of the substrate;
a color filter layer between the substrate and the color conversion layer, the color filter layer comprising:
a first color filter pattern which corresponds to the first color conversion pattern and selectively transmits the light of the first color emitted from the first color conversion pattern;
a second color filter pattern which corresponds to the second color conversion pattern and selectively transmits the light of the second color emitted from the second color conversion pattern; and
a third color filter pattern which corresponds to the transmission layer and transmits the incident light of the incident color emitted from the transmission layer.

7. The color filter of claim 1 , wherein the incident color of the incident light is a third color having a wavelength shorter than each of a wavelength of the light of the first color and a wavelength of the light of the second color.

8. The color filter of claim 1 , wherein
the incident light is blue light, and
the first color and the second color are respectively red and green.

9. The color filter of claim 1 , wherein a thickness of the partition wall is equal to or greater than each of a thickness of the first color conversion pattern and a thickness of the second color conversion pattern.

10. A display apparatus comprising:
a display panel comprising a plurality of pixels from which incident light of an incident color is emitted; and
a color filter in which the incident light of the incident color emitted from the display panel is color-converted and from which color-converted light is emitted, the color filter comprising:
a first substrate comprising a plurality of pixel areas respectively corresponding to the plurality of pixels of the display panel and a light-shielding area which is disposed between adjacent pixel areas;
a color conversion layer which converts the incident light of the incident color and emits the color-converted light, the color conversion layer comprising:
a first color conversion pattern in a first pixel area among the plurality of pixel areas and with which the incident light of the incident color is converted into light of a first color; and
a second color conversion pattern in a second pixel area of the plurality of pixel areas and with which the incident light of the incident color is converted into light of a second color;

a first partition wall in the light-shielding area and between the first color conversion pattern and the second color conversion pattern, the first partition wall comprising a light-scattering material which scatters light incident thereto; and
a second partition wall between the display panel from which the incident light of the incident color is emitted and the color filter, the second partition wall corresponding to the first partition wall which includes the light-scattering material.

11. The display apparatus of claim 10 , wherein within the color filter, a thickness of the first partition wall is equal to or greater than each of a thickness of the first color conversion pattern and a thickness of the second color conversion pattern.

12. The display apparatus of claim 10 , wherein the display panel comprises:
a second substrate on which the plurality of pixels are arranged; and
a thin-film encapsulation layer on the second substrate.

13. The display apparatus of claim 12 , further comprising a planarizing layer between the thin-film encapsulation layer of the display panel and the color filter.

14. The display apparatus of claim 13 , wherein a thickness of the first partition wall of the color filter is equal to or less than each of:
a sum of a thickness of the first color conversion pattern and a thickness of the planarizing layer, and
a sum of a thickness of the second color conversion pattern and the thickness of the planarizing layer.

15. The display apparatus of claim 12 , wherein the second partition wall is between the thin-film encapsulation layer of the display panel and the color filter.

16. The display apparatus of claim 15 , wherein the first partition wall of the color filter and the second partition wall between the thin-film encapsulation layer and the color filter contact each other.

17. A display apparatus comprising:
a display panel comprising:
a plurality of pixels from which incident light of an incident color is emitted;
a first substrate on which the plurality of pixels are arranged; and
a thin-film encapsulation layer on the first substrate; and

a color filter in which the incident light of the incident color emitted from the display panel is color-converted and from which

Assignees

• Samsung Display Co Ltd

Inventors

• Baek Seungin
• Gwon Mira
• KIM Gunshik
• Park Youngeun
• Lee Junghwan
• Chung Yunmo
• Choi Sujin
• Han Younho
• Song Jungbae
• Lee Daewoo

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/877

  comprising scattering means · CPC title

• G02F1/133516 Primary

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G02F1/133504 Primary

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• H10H20/8515

  not being in contact with the bodies · CPC title