Display substrate and display apparatus

Patent metadata

Field	Value
Publication number	US-2022231257-A1
Application number	US-202117480055-A
Country	US
Kind code	A1
Filing date	Sep 20, 2021
Priority date	Jan 20, 2021
Publication date	Jul 21, 2022
Grant date	—

Abstract

Disclosed are a display substrate and a display apparatus. The display substrate includes: a base substrate, including a display region and a non-display region; an encapsulation dam, disposed on the base substrate and located in the non-display region, and annularly surrounding the display region; and an overflow detection structure, disposed on the base substrate and located in the non-display region, and annularly surrounding the display region, where the overflow detection structure is located between a region where the encapsulation dam is located and the display region. The overflow detection structure includes: at least one convex part; and a reflection part on a side, facing away from the base substrate, of the convex part and at least partially covering the at least one convex part.

First claim

What is claimed is:

1 . A display substrate, comprising:
a base substrate, comprising a display region and a non-display region; an encapsulation dam, disposed on the base substrate and located in the non-display region, and annularly surrounding the display region; and an overflow detection structure, disposed on the base substrate and located in the non-display region, and annularly surrounding the display region, where the overflow detection structure is located between a region where the encapsulation dam is located and the display region; wherein the overflow detection structure comprises;
at least one convex part; and
a reflection part on a side, facing away from the base substrate, of the convex part and at least partially covering the at least one convex part.

2 . The display substrate according to claim 1 , wherein the overflow detection structure comprises at least two convex parts annularly arranged, and the reflection part at least fills a gap between the at least two convex parts.

3 . The display substrate according to claim 1 , further comprising:
a protection part between the convex part and the reflection part; wherein an orthographic projection of the protection part on the base substrate fully covers an orthographic projection of the convex part on the base substrate.

4 . The display substrate according to claim 1 , wherein the overflow detection structure further comprises: a refraction part disposed on the reflection part; and
an orthographic projection of the refraction part on the base substrate fully covers an orthographic projection of the at least one convex part on the base substrate.

5 . The display substrate according to claim 4 , wherein the overflow detection structure further comprises: a blocking dam disposed on the refraction part; and
an orthographic projection of the blocking dam on the base substrate is located within the orthographic projection of the refraction part on the base substrate.

6 . The display substrate according to claim 5 , wherein the encapsulation dam comprises a first encapsulation dam and a second encapsulation dam;
the first encapsulation dam surrounds the second encapsulation dam; the first encapsulation dam has a first side facing to the second encapsulation dam; the second encapsulation dam has a second side facing away from the first encapsulation dam; and the overflow detection structure is located between the first side and the second side.

7 . The display substrate according to claim 6 , wherein the overflow detection structure acts as the second encapsulation dam.

8 . The display substrate according to claim 6 , wherein the overflow detection structure is located between the first encapsulation dam and the second encapsulation dam.

9 . The display substrate according to claim 6 , further comprising:
a source-drain metal layer between a layer where the first encapsulation dam is located and the base substrate; and a planarization layer, an anode layer, a pixel defining layer and a spacer layer which are disposed on one side, facing away from the base substrate, of the source-drain metal layer, wherein the first encapsulation dam comprises: a first encapsulation part in the planarization layer; a second encapsulation part in the pixel defining layer; and a third encapsulation part in the spacer layer.

10 . The display substrate according to claim 9 , wherein
the convex part is disposed on the planarization layer; the reflection part is disposed on the anode layer; one end of the reflection part extends between the first encapsulation part and the second encapsulation part, and other end of the reflection part extends along a direction of ascending distance from the first encapsulation dam; and the refraction part is in the pixel defining layer, and the blocking dam is in the spacer layer.

11 . The display substrate according to claim 9 , wherein the second encapsulation dam comprises a fourth encapsulation part in the pixel defining layer, and a fifth encapsulation part in the spacer layer.

12 . The display substrate according to claim 9 , wherein the source-drain metal layer comprises: a low-level signal line located in a frame region; and
one end of the low-level signal line is covered with the first encapsulation part, and other end of the low-level signal line is electrically connected with the reflection part.

13 . The display substrate according to claim 9 , further comprising:
a cathode line on one side, facing away from the base substrate, of the spacer layer, wherein the cathode line is electrically connected with the reflection part.

14 . The display substrate according to claim 9 , further comprising: a buffer layer, a gate insulating layer and an interlayer dielectric layer which are sequentially disposed on a side, facing the source-drain metal layer, of the base substrate, wherein
the planarization layer further comprises: a crack barrier dam surrounding the first encapsulation dam, and part of the crack barrier dam is at least embedded in one of the buffer layer, the gate insulating layer or the interlayer dielectric layer.

15 . The display substrate according to claim 1 , wherein the encapsulation dam comprises a first encapsulation dam and a second encapsulation dam;
the first encapsulation dam surrounds the second encapsulation dam; the first encapsulation dam has a first side facing to the second encapsulation dam; the second encapsulation dam has a second side facing away from the first encapsulation dam; and the overflow detection structure is located between the first side and the second side.

16 . The display substrate according to claim 15 , wherein the overflow detection structure is located between the first encapsulation dam and the second encapsulation dam.

17 . The display substrate according to claim 15 , further comprising:
a source-drain metal layer between a layer where the first encapsulation dam is located and the base substrate; and a planarization layer, an anode layer, a pixel defining layer and a spacer layer which are disposed on one side, facing away from the base substrate, of the source-drain metal layer, wherein the first encapsulation dam comprises: a first encapsulation part in the planarization layer; a second encapsulation part in the pixel defining layer; and a third encapsulation part in the spacer layer.

18 . The display substrate according to claim 17 , wherein
the convex part is disposed on the planarization layer; the reflection part is disposed on the anode layer; one end of the reflection part extends between the first encapsulation part and the second encapsulation part, and other end of the reflection part extends along a direction of ascending distance from the first encapsulation dam; and the refraction part is in the pixel defining layer, and the blocking dam is in the spacer layer.

19 . The display substrate according to claim 17 , wherein the second encapsulation dam comprises a fourth encapsulation part in the pixel defining layer, and a fifth encapsulation part in the spacer layer.

20 . A display apparatus, comprising a display substrate, wherein the display substrate comprising:
a base substrate, comprising a display region and a non-display region; an encapsulation dam, disposed on the base substrate and located in the non-display region, and annularly surrounding the display region; and an overflow detection structure, disposed on the base substrate and located in the non-displa

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Tao
• Sun Tao
• Cui Yue

Classifications

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/878

  comprising reflective means · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title

• H01L51/5271

  Electricity · mapped topic