Display structure having a dam and gap

Patent metadata

Field	Value
Publication number	US-11271185-B2
Application number	US-201916614950-A
Country	US
Kind code	B2
Filing date	Jul 9, 2019
Priority date	Feb 27, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A display structure is provided. The display structure includes a substrate, a dam, a first film layer, a second film layer, and a third film layer. The third film layer has a first spread rate for the first film layer, the third film layer has a second spread rate for the second film layer, and the first spread rate is less than the second spread rate. The spread rates of the third film layer on the first and second film layers are different, so as to slow the spread rate of the third film layer near an area of the dam, thereby reducing the risk that the third film layer overflows the dam, so that the encapsulation reliability of the display structure can be improved.

First claim

The invention claimed is:

1. A display structure, comprising:
a substrate;
a dam disposed on the substrate;
a first film layer disposed on the substrate and covering the dam;
a second film layer disposed on the substrate, a first gap located between the second film layer and the dam; and
a third film layer disposed on the substrate, the first film layer, and the second film layer,
wherein when the third film layer is disposed on the first film layer and the second film layer, the third film layer is in contact with the first film layer at the first gap, and a material of the first film layer is different from a material of the second film layer,
wherein the third film layer has a first spread rate for the first film layer, the third film layer has a second spread rate for second film layer, and the first spread rate is less than the second spread rate.

2. The display structure according to claim 1 , further comprising:
a light-emitting area disposed on the substrate,
wherein the second film layer is disposed on the first film layer; and
wherein the first film layer covers the light-emitting area and continuously extends across the dam, the first film layer forms a step portion at the dam, and the first gap is between a first edge of the step portion and a second edge of the second film layer.

3. The display structure according to claim 2 , wherein a boundary defined by the second film layer has a distance away from a side of the dam adjacent to the second film layer, and the distance is greater than zero.

4. The display structure according to claim 1 , further comprising:
a light-emitting area disposed on the substrate,
wherein the first film layer covers the dam and extends toward the light-emitting area, the first film layer forms a step portion at the dam, and a second gap is located between the first film layer and the light-emitting area; and
wherein the second film layer covers the light-emitting area and extends toward the first film layer, and a portion of the second film layer fills into the second gap, extends and covers on the first film layer.

5. The display structure according to claim 1 , further comprising:
a light-emitting area disposed on the substrate,
wherein the second film layer covers the light-emitting area and extends toward the dam, and the first gap is defined between the second film layer and the dam; and
wherein the first film layer covers the dam and extends toward the light-emitting area, and a portion of the first film layer fills into the first gap and continues to extend and cover on the second film layer.

6. The display structure according to claim 1 , further comprising:
a light-emitting area disposed on the substrate,
wherein the first film layer covers the light-emitting area and continuously extends across the dam, and the first film layer forms a step portion at the dam;
wherein the second film layer is an oxygen-containing layer formed by treating the first film layer an oxygen ion treatment process, and the second film layer completely covers the light-emitting area; and
wherein the first gap is between a first edge of the step portion and a second edge of the second film layer.

7. A display structure, comprising:
a substrate;
a dam disposed on the substrate;
a first film layer disposed on the substrate; and
a second film layer disposed on the substrate, a first gap located between the second film layer and the dam,
wherein the first film layer has a first oxygen content, the second film layer has a second oxygen content, and the second oxygen content is greater than the first oxygen content.

8. The display structure according to claim 7 , further comprising:
a light-emitting area disposed on the substrate,
wherein the second film layer is disposed on the first film layer; and
wherein the first film layer covers the light-emitting area and continuously extends across the dam, the first film layer forms a step portion at the dam, and the first gap is between a first edge of the step portion and a second edge of the second film layer.

9. The display structure according to claim 8 , wherein a boundary defined by the second film layer has a distance away from a side of the dam adjacent to the second film layer, and the distance is greater than zero.

10. The display structure according to claim 7 , further comprising:
a light-emitting area disposed on the substrate,
wherein the first film layer covers the dam and extends toward the light-emitting area, the first film layer forms a step portion at the dam, and a second gap is located between the first film layer and the light-emitting area; and
wherein the second film layer covers the light-emitting area and extends toward the first film layer, and a portion of the second film layer fills into the second gap, extends and covers on the first film layer.

11. The display structure according to claim 7 , further comprising:
a light-emitting area disposed on the substrate,
wherein the second film layer covers the light-emitting area and extends toward the dam, and the first gap is defined between the second film layer and the dam; and
wherein the first film layer covers the dam and extends toward the light-emitting area, and a portion of the first film layer fills into the first gap and continues to extend and cover on the second film layer.

12. The display structure according to claim 7 , further comprising:
a light-emitting area disposed on the substrate,
wherein the first film layer covers the light-emitting area and continuously extends across the dam, and the first film layer forms a step portion at the dam;
wherein the second film layer is an oxygen-containing layer formed by treating the first film layer an oxygen ion treatment process, and the second film layer completely covers the light-emitting area; and
wherein the first gap is between a first edge of the step portion and a second edge of the second film layer.

13. A display structure, comprising:
a substrate;
a dam disposed on the substrate;
a first film layer disposed on the substrate and covering the dam;
a second film layer disposed on the substrate, a first gap located between the second film layer and the dam; and
a third film layer disposed on the substrate, the first film layer, and the second film layer,
wherein when the third film layer is disposed on the first film layer and the second film layer, the third film layer has a first spread rate for the first film layer, the third film layer has a second spread rate for the second film layer, and the first spread rate is less than the second spread rate.

14. The display structure according to claim 13 , further comprising:
a light-emitting area disposed on the substrate,
wherein the second film layer is disposed on the first film layer; and
wherein the first film layer covers the light-emitting area and continuously extends across the dam, the first film layer forms a step portion at the dam, and the first gap is between a first edge of the step portion and a second edge of the second film layer.

15. The display structure according to claim 14 , wherein a boundary defined by the second film layer has a distance away from a side of the dam adjacent to the second film layer, and the distance is greater than zero.

16. The display structure according to claim 13 , further comprising:
a light-emitting area disposed on the substrate,
wherein the first film layer covers the dam and extends toward the light-emitting area, the first film layer forms a step portion at the dam, and a second gap is located between the first film layer

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Wang Kan

Classifications

• H10K59/8722

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

• H10K50/844

  Encapsulations · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title

• H10D30/6758

  characterised by the insulating substrates · CPC title

• H10D30/0327

  on sapphire substrates, e.g. of silicon-on-sapphire [SOS] transistor · CPC title