Color filter substrate and display panel including the same

Patent metadata

Field	Value
Publication number	US-9804306-B2
Application number	US-201514709965-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	Jan 9, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A color filter substrate comprises an insulating substrate and a color filter layer including a blue color filter and a green color filter spaced apart from each other on the insulating substrate, wherein the blue color filter includes first metal particles having a first mean diameter, and the green color filter includes second metal particles having a second mean diameter larger than the first mean diameter.

First claim

What is claimed is:

1. A color filter substrate comprising:
an insulating substrate; and
a color filter layer including a blue color filter and a green color filter spaced apart from each other on the insulating substrate,
wherein the blue color filter includes metal particles, and the green color filter includes metal particles,
wherein first metal particles defined as metal particles included in the blue color filter have a first mean diameter,
wherein second metal particles defined as metal particles included in the green color filter have a second mean diameter,
wherein the second mean diameter is larger than the first mean diameter, and
wherein the first metal particles have a mean diameter ranging from 20 nm to 40 nm.

2. The color filter substrate of claim 1 ,
wherein the color filter layer further comprises a red color filter,
the red color filter being spaced apart from the blue color filter and the green color filter,
wherein third metal particles defined as metal particles included in the red color filter have a third mean diameter, and
wherein the third mean diameter is larger than the second mean diameter.

3. The color filter substrate of claim 2 , wherein each of the first metal particles, the second metal particles, and the third metal particles is one or more selected from a group consisting of gold (Au), silver (Ag), aluminum (Al), alumina (Al2O3), cobalt (Co), copper (Cu), chrome (Cr), platinum (Pt), nickel (Ni), iron (Fe), molybdenum (Mo) and tungsten (W).

4. The color filter substrate of claim 2 , wherein the blue color filter includes, as the metal particles, silver particles, the green color filter includes, as the metal particles, silver particles having a mean diameter exceeding 40 nm but not exceeding 70 nm, and the red color filter includes, as the metal particles, silver particles having a mean diameter exceeding 70 nm but not exceeding 100 nm.

5. The color filter substrate of claim 2 , wherein the first metal particles, the second metal particles, and the third metal particles are spherical metal particles.

6. The color filter substrate of claim 1 , further comprising an opaque layer formed on the insulating substrate between the green color filter and the blue color filter.

7. The color filter substrate of claim 6 , further comprising an overcoat layer formed on the color filter layer and the opaque layer.

8. The color filter substrate of claim 7 , further comprising a common electrode disposed on the overcoat layer.

9. A display panel comprising:
a color filter substrate in which a color filter layer is formed on an insulating substrate;
and an opposed substrate facing the color filter substrate,
wherein the color filter layer includes a blue color filter, a green color filter, and a red color filter spaced apart from each other,
wherein each of the blue color filter, the green color filter, and the red color filter includes surface-modified metal particles including metal particles and hydrocarbon compound surface modification layer covering the metal particles,
wherein the blue color filter includes first metal particles having a first mean diameter, the green color filter includes second metal particles having a second mean diameter larger than the first mean diameter and the red color filter includes third metal particles having a third mean diameter larger than the second mean diameter.

10. The display panel of claim 9 , wherein the metal particles are one or more selected from a group consisting of gold (Au), silver (Ag), aluminum (Al), alumina (Al2O3), cobalt (Co), copper (Cu), chrome (Cr), platinum (Pt), nickel (Ni), iron (Fe), molybdenum (Mo) and tungsten (W).

11. The display panel of claim 9 , wherein the blue color filter includes, as the metal particles, silver particles having a mean diameter ranging from 20 nm to 40 nm, the green color filter includes, as the metal particles, silver particles having a mean diameter exceeding 40 nm but not exceeding 70 nm, and the red color filter includes, as the metal particles, silver particles having a mean diameter exceeding 70 nm but not exceeding 100 nm.

12. The display panel of claim 9 , wherein the hydrocarbon compounds have 6 to 20 carbon atoms.

13. The display panel of claim 12 , the hydrocarbon compounds are one or more saturated hydrocarbon compounds selected from a group consisting of hexane (C 6 H 14 ), heptane (C 7 H 16 ), octane (C 8 H 18 ), nonane (C 9 H 20 ), decane (C 10 H 22 ), undecane (C 11 H 24 ), dodecane (C 12 H 26 ), tridecane (C 13 H 28 ), tetradecane (C 14 H 30 ), pentadecane (C 15 H 32 ), hexadecane (C 16 H 34 ), heptadecane (C 17 H 36 ), octadecane (C 18 H 38 ), nonadecane (C 19 H 40 ) and eicosane (C 20 H 42 ).

14. The display panel of claim 9 , wherein the metal particles are spherical metal particles.

15. The display panel of claim 9 , further comprising an opaque layer formed on the insulating substrate among the green color filter, the blue color filter, and the red color filter.

16. The display panel of claim 15 , further comprising an overcoat layer formed on the color filter layer and the opaque layer.

17. The display panel of claim 16 , further comprising a common electrode disposed on the overcoat layer.

18. The display panel of claim 9 , wherein the opposed substrate further comprises an organic emission layer formed on the insulating substrate.

19. A color filter substrate comprising:
an insulating substrate; and
a color filter layer including a blue color filter and a green color filter spaced apart from each other on the insulating substrate,
wherein the blue color filter includes first metal particles having mean diameter ranging from 20 nm to 40 nm, and the green color filter includes second metal particles having mean diameter exceeding 40 nm but not exceeding 70 nm.

20. A color filter substrate comprising:
an insulating substrate; and
a color filter layer including a blue color filter and a green color filter spaced apart from each other on the insulating substrate,
wherein the blue color filter includes metal particles, and the green color filter includes metal particles,
wherein a diameter of each of the metal particles of the blue color filter is smaller than a diameter of each of the metal particles of the green color filter, and
wherein the blue color filter includes, the metal particles having a mean diameter ranging from 20 nm to 40 nm.

Assignees

• Samsung Display Co Ltd
• Samsung Display Co Ltd

Inventors

• Lee Minsu
• Kim Jin-Young
• Yang Yonghoon
• Lee Jin Hyeong

Classifications

• H01L27/322

  Electricity · mapped topic

• G02B5/206 Primary

  comprising particles embedded in a solid matrix · CPC title

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• H10K59/38 Primary

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