Display device including filling layer surrounding a column spacer

Patent metadata

Field	Value
Publication number	US-11430968-B2
Application number	US-202016999726-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Jan 9, 2020
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A display device, including: a display panel including a light emitting element and an encapsulation layer covering the light emitting element; a color conversion panel overlapping the display panel, the color conversion panel including a color conversion element; a column spacer between the display panel and the color conversion panel; a filling layer filling a space between the display panel and the color conversion panel and surrounding the column spacer; and a buffer layer between the column spacer and the encapsulation layer of the display panel, the buffer layer including silicon oxycarbide (SiOxCy).

First claim

What is claimed is:

1. A display device, comprising:
a display panel including a light emitting element and an encapsulation layer covering the light emitting element;
a color conversion panel overlapping the display panel, the color conversion panel including a color conversion element;
a column spacer between the display panel and the color conversion panel;
a filling layer filling a space between the display panel and the color conversion panel and surrounding the column spacer; and
a buffer layer between the column spacer and the encapsulation layer of the display panel, the buffer layer including silicon oxycarbide (SiO x C y ).

2. The display device of claim 1 , wherein the encapsulation layer includes an inorganic encapsulation layer contacting the buffer layer, and
wherein an elastic modulus of the buffer layer is less than an elastic modulus of the inorganic encapsulation layer.

3. The display device of claim 2 , wherein a hardness of the buffer layer is less than a hardness of the inorganic encapsulation layer.

4. The display device of claim 1 , wherein an elastic modulus of the buffer layer is less than or equal to 3.0 GPa.

5. The display device of claim 1 , wherein a hardness of the buffer layer is less than or equal to 0.4 GPa.

6. The display device of claim 1 , wherein a thickness of the buffer layer is greater than 0.5 μm.

7. The display device of claim 1 , wherein the encapsulation layer includes an inorganic encapsulation layer contacting the buffer layer, and
wherein a difference between a refractive index of the buffer layer and a refractive index of the inorganic encapsulation layer is less than 0.05.

8. The display device of claim 1 , wherein a refractive index of the buffer layer is greater than or equal to 1.5 and less than or equal to 1.9.

9. The display device of claim 1 , wherein an atomic ratio of oxygen to silicon in the buffer layer is greater than or equal to 0.6 and less than or equal to 0.63.

10. The display device of claim 1 , wherein an atomic ratio of carbon to silicon in the buffer layer is greater than or equal to 1.24 and less than or equal to 1.30.

11. The display device of claim 1 , wherein wrinkles are formed on a surface of the buffer layer that contacts the column spacer.

12. The display device of claim 11 , wherein an average width of the wrinkles is 0.01 μm to 5 μm.

13. The display device of claim 1 , wherein the buffer layer includes:
a first sub-buffer layer contacting the encapsulation layer and having a first elastic modulus;
a second sub-buffer layer contacting the column spacer and having a second elastic modulus; and
a third sub-buffer layer between the first sub-buffer layer and the second sub-buffer layer, and the third sub-buffer layer having a third elastic modulus greater than the first elastic modulus and the second elastic modulus.

14. The display device of claim 13 , wherein the second elastic modulus is less than the first elastic modulus.

15. The display device of claim 1 , wherein the column spacer includes a plurality of sub-column spacers.

16. The display device of claim 1 , wherein the color conversion panel further includes black matrix surrounding the color conversion element.

17. The display device of claim 16 , wherein the column spacer is between the buffer layer and the black matrix.

18. The display device of claim 16 , wherein the column spacer is between the color conversion element and the black matrix.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Yohan
• Park Jongjin
• Yun Won Min
• Lee Seungju
• Jung Sumin
• Joo Young Cheol
• Cho Yoon Hyeung

Classifications

• H10K59/8792

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

• H10K59/873

  Encapsulations · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/8722

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

• H10K50/844

  Encapsulations · CPC title