Color filter including quantum dots and metal nanoparticles and display apparatus including the same

Patent metadata

Field	Value
Publication number	US-11194083-B2
Application number	US-201615083535-A
Country	US
Kind code	B2
Filing date	Mar 29, 2016
Priority date	Oct 7, 2015
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A color filter and a display apparatus employing the color filter are provided. The color filter includes a base substrate and a color photoresist layer disposed on the base substrate. The color photoresist layer includes a photopolymerized photosensitive composition, at least one of a pigment and a dye, and quantum dots.

First claim

What is claimed is:

1. A color filter comprising:
a base substrate; and
a color photoresist layer disposed on the base substrate, the color photoresist layer comprising:
a first color filter region configured to generate a light of a first color wavelength, the first color filter region comprising at least one of a first pigment or a first dye, first quantum dots, and first metal nanoparticles, wherein the first metal nanoparticles are spaced apart from the first quantum dots by first alkyl groups; and
a second color filter region configured to generate a light of a second color wavelength, the second color filter region comprising at least one of a second pigment or a second dye, second quantum dots, and second metal nanoparticles, wherein the second metal nanoparticles are spaced apart from the second quantum dots by second alkyl groups, wherein:
the first color filter region is different from the second color filter region,
each of the first metal nanoparticles has a first polygon shape,
each of the second metal nanoparticles has a second polygon shape, and
a corner portion of the first polygon shape is sharper than a corner portion of the second polygon shape.

2. The color filter of claim 1 , wherein each of the first and second metal nanoparticles comprises a plurality of sides and at least one corner formed by the plurality of sides.

3. The color filter of claim 1 , wherein a cross-sectional shape of each of the first and second polygon shapes is a triangle in which at least one corner is chamfered.

4. The color filter of claim 3 ,
wherein the corner portion of the second polygon shape is relatively more round than the corner portion of the first polygon shape.

5. The color filter of claim 1 , wherein a distance between one of the first metal nanoparticles and one of the first quantum dots is determined by one of the first alkyl groups, and
a distance between one of the second metal nanoparticles and one of the second quantum dots is determined by one of the second alkyl groups.

6. The color filter of claim 1 , wherein
the color photoresist layer further comprises:
a third color filter region configured to generate a light of a third color wavelength, the third color filter region comprising at least one of a third pigment, a third dye and third quantum dots, and third metal nanoparticles, wherein the third metal nanoparticles are spaced apart from the third quantum dots by third alkyl groups, and
wherein the first, second, and third quantum dots have different sizes, configured to respectively generate the light of the first color wavelength, the light of the second color wavelength, and the light of the third color wavelength.

7. The color filter of claim 6 , wherein
the first, second, and third metal nanoparticles have different shapes.

8. The color filter of claim 7 , wherein the first, second, and third quantum dots have sizes of D 1 , D 2 , and D 3 , relatively, wherein the sizes D 1 , D 2 , and D 3 satisfy relationship of D 1 >D 2 >D 3 , and
wherein at least one corner of the first, second, and third metal nanoparticles are more chamfered to rounder shape in an order of the first metal nanoparticles, the second metal nanoparticles, and the third metal nanoparticles.

9. The color filter of claim 8 , wherein the first, second, and third color filter regions are configured to generate a red color, a green color, and a blue color, respectively.

10. The color filter of claim 7 , wherein the first, second, and third alkyl groups are bonded respectively with the first, second, and third metal nanoparticles,
wherein a distance between the first metal nanoparticles and the first quantum dots, a distance between the second metal nanoparticles and the second quantum dots, and a distance between the third metal nanoparticles and the third quantum dots are respectively determined by the first, second, and third alkyl groups.

11. A display apparatus comprising:
a display unit comprising first and second pixel regions which are controlled according to an image signal; and
a color filter comprising first and second color filter regions corresponding to the first and second pixel regions, wherein:
a first color filter region configured to generate a light of a first color wavelength, the first color filter region comprising at least one of a first pigment or a first dye, first quantum dots, and first metal nanoparticles, wherein the first metal nanoparticles are spaced apart from the first quantum dots by first alkyl groups; and
a second color filter region configured to generate a light of a second color wavelength, the second color filter region comprising at least one of a second pigment or a second dye, second quantum dots, and second metal nanoparticles, wherein the second metal nanoparticles are spaced apart from the second quantum dots by second alkyl groups,
wherein:
the first color filter region is different from the second color filter region,
each of the first metal nanoparticles has a first polygon shape,
each of the second metal nanoparticles has a second polygon shape, and
a corner portion of the first polygon shape is sharper than a corner portion of the second polygon shape.

12. The display apparatus of claim 11 , wherein
the first and second color filter regions further comprise:
a third color filter region comprising at least one of a third pigment or a third dye, third quantum dots, and the third color filter region is configured to generate a light of a third color wavelength, and
wherein the first, second, and third quantum dots have different sizes to respectively configured to generate the light of the first color wavelength, the light of the second color wavelength, and the light of the third color wavelength.

13. The display apparatus of claim 12 , wherein
the third color filter region comprises third metal nanoparticles, and
the first, second, and third metal nanoparticles have different shapes.

14. The display apparatus of claim 13 , wherein the first, second, and third quantum dots have sizes of D 1 , D 2 , and D 3 , respectively, wherein the sizes D 1 , D 2 , and D 3 satisfy relationship of D 1 >D 2 >D 3 , and
wherein at least one corner of the first, second, and third metal nanoparticles are more chamfered to rounder shape in an order of the first metal nanoparticles, the second metal nanoparticles, and the third metal nanoparticles.

15. The display apparatus of claim 11 , wherein the display unit is selected from a group consisting a transmissive liquid crystal (LC) panel, a reflective LC panel, and an organic light-emitting panel.

16. A display apparatus comprising:
a display unit comprising a plurality of pixel regions which are controlled according to an image signal; and
a color filter comprising a first color filter region, a second color filter region, and a third color filter region that are configured to generate different color light from each other, wherein:
the first color filter region includes a first quantum dot configured to generate a light of a first color wavelength, a first metal nanoparticle configured to increase extinction of photons at the first color wavelength, and one of a first pigment and a first dye,
the second color filter region includes a second quantum dot configured to generate a light of a second color wavelength, a second metal nanoparticle configured to increase extinction of photons at the second color wavelength, and one of a second pigment and a second dye, and
the third color filter region including a third quantum dot configured to generate a light of a third color wavelength

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Minsu
• Kwon Dohyun
• Kim Younjoon
• Oh Mira
• Lee Minjung
• Lee Junghun
• Im Choongyoul
• Jang Mi
• Choi Kyungmin

Classifications

• C09K2323/031

  Polarizer or dye · CPC title

• G03F7/0047

  characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing · CPC title

• G02B5/207

  comprising semiconducting materials · CPC title

• G02F2203/05

  wavelength dependent · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title