Display device

Patent metadata

Field	Value
Publication number	US-11016325-B2
Application number	US-201916356197-A
Country	US
Kind code	B2
Filing date	Mar 18, 2019
Priority date	Mar 21, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A display device including a display layer to provide a first color light, a color control layer on the grayscale display layer and including a transmission filter for transmitting the first color light and a color conversion filter for converting the first color light to another color light, and an optical control layer on the color control layer. The optical control layer includes a metal layer having an absorption coefficient of 3 or more and 3.5 or less in a wavelength range of 530 nm to 570 nm and a first inorganic sub-layer having an absorption coefficient of 0.3 or more and 1 or less in a wavelength range of 530 nm to 570 nm.

First claim

What is claimed is:

1. A display device, comprising:
a display layer to provide a first color light;
a color control layer on the display layer and including a transmission filter for transmitting the first color light and a color conversion filter for converting the first color light to another color light; and
an optical control layer on the color control layer and including a metal layer having an absorption coefficient of 3 or more and 3.5 or less in a wavelength range of 530 nm to 570 nm and a first inorganic sub-layer having an absorption coefficient of 0.3 or more and 1 or less in a wavelength range of 530 nm to 570 nm.

2. The display device as claimed in claim 1 , wherein the first inorganic sub-layer satisfies Equation 1 below;

2
⁢

⁢
Ta

=

(

m
+

1
2

)

×

2
⁢
λ

(

n
1

+

n
2

)

[

Equation
⁢

⁢
2

]

wherein in Equation 1, λ is a wavelength of 530 nm to 570 nm, m is 0 or a natural number, Ta is a thickness of the first inorganic sub-layer, and n 1 is a refractive index of the first inorganic sub-layer at λ.

3. The display device as claimed in claim 2 , wherein a thickness of the first inorganic sub-layer is 10 nm or more and 40 nm or less.

4. The display device as claimed in claim 2 , wherein a refractive index of the first inorganic sub-layer is 2 or more and 2.5 or less.

5. The display device as claimed in claim 1 , wherein the first inorganic sub-layer includes molybdenum tantalum oxide.

6. The display device as claimed in claim 1 , further comprising a second inorganic sub-layer having an absorption coefficient of 0.001 or more and 0.2 or less in a wavelength range of 530 nm to 570 nm.

7. The display device as claimed in claim 6 , wherein an inorganic layer including the first inorganic sub-layer and the second inorganic sub-layer satisfies the following Equation 2;

2
⁢
Ta

=

(

m
+

1
/
2

)

×
2
⁢

λ
/

(

n
⁢

⁢
1

+

n
⁢

⁢
2

)

[

Equation
⁢

⁢
2

]

wherein in the above Equation 2, λ is a wavelength of 530 nm to 570 nm, m is 0 or a natural number, Ta is a thickness of the inorganic layer IL, n 1 is a refractive index of the first inorganic sub-layer Sub-IL1 at the λ wavelength, and 112 is a refractive index of the second inorganic sub-layer Sub-IL2 at the λ wavelength.

8. The display device as claimed in claim 6 , wherein a difference between a refractive index of the first inorganic sub-layer and a refractive index of the second inorganic sub-layer is 0 or more and 0.5 or less.

9. The display device as claimed in claim 6 , wherein a refractive index of the second inorganic sub-layer is 2 or more and 2.5 or less.

10. The display device as claimed in claim 6 , wherein a thickness of the first inorganic sub-layer is 9.9 nm or more and 39.9 nm or less, and a thickness of the second inorganic sub-layer is 0.1 nm or more and 20.0 nm or less.

11. The display device as claimed in claim 6 , wherein the second inorganic sub-layer includes indium zinc oxide.

12. The display device as claimed in claim 6 , wherein the second inorganic sub-layer is between the metal layer and the first inorganic sub-layer.

13. The display device as claimed in claim 6 , wherein the second inorganic sub-layer is on the metal layer and the first inorganic sub-layer.

14. The display device as claimed in claim 1 , wherein the metal layer has a thickness of 5 nm or more and 20 nm or less.

15. The display device as claimed in claim 1 , wherein the metal layer includes silver.

16. The display device as claimed in claim 1 , wherein the color conversion filter includes at least a quantum dot or a quantum rod.

17. The display device as claimed in claim 1 , wherein:
the display layer includes a first pixel corresponding to the transmission filter, a second pixel corresponding to the color conversion filter, and a third pixel,
the color conversion filter includes a first color conversion filter corre

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Ohjeong
• Lee Seulgee
• Han Minju
• Lyu Jaejin
• Chei Suk-Kung
• Suh Duckjong

Classifications

• H10K59/8792

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

• H10K59/878

  comprising reflective means · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title