Display panel comprising a first sealing layer covering a color filter and a second sealing layer covering a color control layer and a step compensating layer

Patent metadata

Field	Value
Publication number	US-11500240-B2
Application number	US-202016788675-A
Country	US
Kind code	B2
Filing date	Feb 12, 2020
Priority date	Mar 21, 2019
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A display panel includes a first substrate which includes a display device and a second substrate which is disposed on the first substrate. The second substrate covers a base layer, a color filter layer, a first sealing layer, a color control layer, a step compensating layer, and a second sealing layer. The base layer includes a display area and a non-display area adjacent to the display area. The color filter layer overlaps the display area in a plan view, and is disposed under the base layer. The first sealing layer covers the color filter layer. The color control layer overlaps the display area in the plan view, and is disposed under the first sealing layer. The step compensating layer overlaps the non-display area in the plan view, and is disposed under the base layer. The second sealing layer covers the color control layer and the step compensating layer.

First claim

What is claimed is:

1. A display panel comprising:
a first substrate which includes a display device; and
a second substrate which is disposed on the first substrate, the second substrate comprising:
a base layer which includes a display area and a non-display area adjacent to the display area,
a color filter layer which overlaps the display area in a plan view, and is disposed under the base layer,
a first sealing layer which covers the color filter layer,
a color control layer which overlaps the display area in the plan view, and is disposed under the first sealing layer,
a step compensating layer which overlaps the non-display area in the plan view, and is disposed under the base layer, and
a second sealing layer which covers the color control layer and the step compensating layer.

2. The display panel of claim 1 , wherein the color filter layer comprises a first color filter layer, a second color filter layer, and a third color filter layer.

3. The display panel of claim 2 , wherein the step compensating layer comprises a same material as any one of materials of the first to third color filter layers.

4. The display panel of claim 2 , wherein the color control layer comprises a first wavelength conversion layer including a first emitting material, a second wavelength conversion layer including a second emitting material, and a transmission layer.

5. The display panel of claim 4 , wherein the step compensating layer comprises a same material as any one of materials of the first wavelength conversion layer and the second wavelength conversion layer.

6. The display panel of claim 5 , wherein the step compensating layer is spaced apart from the color control layer.

7. The display panel of claim 4 , wherein the step compensating layer comprises a first layer disposed under the base layer and a second layer disposed under the first layer.

8. The display panel of claim 7 , wherein a width of the first layer is greater than a width of the second layer.

9. The display panel of claim 7 , wherein the first layer comprises a same material as any one of materials of the first to third color filter layers, and the second layer comprises a same material as another one of the materials of the first to third color filter layers.

10. The display panel of claim 7 , wherein the first layer comprises a same material as any one of materials of the first to third color filter layers, and the second layer comprises a same material as any one of materials of the first and second wavelength conversion layers.

11. The display panel of claim 10 , wherein the first sealing layer is disposed between the first layer and the second layer.

12. The display panel of claim 1 , wherein the second substrate further comprises a first light blocking layer which overlaps the non-display area in the plan view, and is disposed under the second sealing layer.

13. The display panel of claim 12 , wherein the second substrate further comprises a second light blocking layer which overlaps the display area in the plan view, and is disposed under the second sealing layer.

14. The display panel of claim 1 , wherein the step compensating layer is disposed between the first sealing layer and the second sealing layer.

15. The display panel of claim 1 , wherein the step compensating layer is disposed between the first sealing layer and the base layer.

16. The display panel of claim 1 , wherein the step compensating layer is covered by the first sealing layer and the second sealing layer.

17. The display panel of claim 1 , wherein a maximum distance from the base layer to the second sealing layer in the display area is longer than a maximum distance from the base layer to the second sealing layer in the non-display area.

18. The display panel of claim 1 , further comprising a light blocking portion disposed between the step compensating layer and the base layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jeongki
• Kim Jang-Il
• Kim Jong-Hoon
• Yoon Yeogeon
• Hong Seok-Joon

Classifications

• G02F1/25

  as to hue or predominant wavelength · CPC title

• G02F2201/54

  Arrangements for reducing warping-twist · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F2201/48

  Flattening arrangements · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title