Display substrate, method for manufacturing the same, and display apparatus

Patent metadata

Field	Value
Publication number	US-12342675-B2
Application number	US-202117800790-A
Country	US
Kind code	B2
Filing date	Oct 11, 2021
Priority date	Nov 30, 2020
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A display substrate, a method for manufacturing the display substrate, and a display apparatus are provided. The display substrate includes: a base substrate; a partition structure, where the partition structure has a first side and a second side opposite to each other; and a light guide structure arranged proximate to the partition structure. At least one light guide structure is located on the first side of the partition structure and configured to guide a light onto a part, which faces the light guide structure, of a side surface of the partition structure on the first side; and the partition structure has a first inclined side surface located on the first side, where the first inclined side surface extends distally from the base substrate and is inclined away from the second side, and a first space is formed between the first inclined side surface and the base substrate.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate, comprising a display area and an encapsulation area surrounding the display area, wherein the encapsulation area is configured to accommodate a sealant;
a partition structure disposed on the base substrate and located in the encapsulation area, wherein the partition structure has a first side and a second side opposite to each other, one of the first side and the second side is proximate to the display area, and the other of the first side and the second side is away from the display area, and
a light guide structure disposed on the base substrate, wherein the light guide structure is located in the encapsulation area and arranged proximate to the partition structure,
wherein at least one light guide structure is located on the first side of the partition structure and configured to guide light onto a part, which faces the light guide structure, of a side surface of the partition structure on the first side; and
wherein the partition structure has a first inclined side surface located on the first side, wherein the first inclined side surface extends distally from the base substrate and is inclined away from the second side, and a first space is formed between the first inclined side surface and the base substrate.

2. The display substrate of claim 1 , wherein the light guide structure comprises:
a first light reflection layer disposed on the base substrate;
a first light guide layer disposed on a side of the first light reflection layer away from the base substrate; and
a second light reflection layer disposed on a side of the first light guide layer away from the base substrate.

3. The display substrate of claim 2 , wherein the light guide structure further comprises:
a second light guide layer disposed between the first light reflection layer and the first light guide layer; and
a third light guide layer disposed between the first light guide layer and the second light reflection layer,
wherein a refractive index of a material of the first light guide layer is greater than a refractive index of a material of the second light guide layer, and the refractive index of the material of the first light guide layer is greater than a refractive index of a material of the third light guide layer.

4. The display substrate of claim 2 , wherein the light guide structure further comprises a light absorption layer disposed on a side of the second light reflection layer away from the base substrate.

5. The display substrate of claim 4 , wherein each of the light absorption layer, the second light reflection layer, and the third light guide layer has an opening, wherein the opening of the light absorption layer, the opening of the second light reflection layer, and the opening of the third light guide layer are communicated with each other to expose at least a part of the first light guide layer.

6. The display substrate of claim 5 , wherein the first light guide layer has a spacing groove dividing the first light guide layer into a first light guide sub-layer and a second light guide sub-layer, and an orthographic projection of the spacing groove on the base substrate falls within each of orthographic projections of the openings of the light absorption layer, the second light reflection layer, and the third light guide layer on the base substrate.

7. The display substrate of claim 1 , wherein the partition structure comprises a top surface away from the base substrate, the base substrate comprises a first surface facing the partition structure, and a vertical distance from an end of the first inclined side surface away from the base substrate to the first surface is less than or equal to a vertical distance from the top surface to the first surface.

8. The display substrate of claim 7 , wherein the partition structure further comprises a second inclined side surface located on the second side, wherein the second inclined side surface is inclined away from the first side in a direction from the side proximate to the base substrate to the side away from the base substrate, and a second space is formed between the second inclined side surface and the base substrate.

9. The display substrate of claim 8 , wherein a vertical distance from an end of the second inclined side surface away from the base substrate to the first surface is less than or equal to the vertical distance from the top surface to the first surface.

10. The display substrate of claim 9 , wherein the first light guide layer comprises a top surface away from the base substrate, and a vertical distance from the top surface of the first light guide layer to the first surface is less than each of the vertical distance from the end of the first inclined side surface away from the base substrate to the first surface and the vertical distance from the end of the second inclined side surface away from the base substrate to the first surface.

11. The display substrate of claim 4 , wherein the display substrate further comprises a plurality of pixel units disposed in the display area of the base substrate, and each of the pixel units comprises a pixel driver circuit, and a light-emitting device electrically connected to the pixel driver circuit, wherein the light-emitting device comprises a first electrode, a second electrode, and a light-emitting layer disposed between the first electrode and the second electrode; and wherein the pixel driver circuit comprises at least one thin film transistor disposed on the base substrate, and the thin film transistor comprises an active layer, a gate electrode, a source electrode, and a drain electrode; and
wherein the display substrate further comprises: a light-shielding layer disposed on a side of the active layer proximate to the base substrate; a first conductive layer disposed on a side of the active layer away from the base substrate, wherein the gate electrode is located in the first conductive layer; a second conductive layer disposed on a side of the first conductive layer away from the base substrate, wherein the source electrode and the drain electrode are located in the second conductive layer; a third conductive layer disposed on a side of the second conductive layer away from the base substrate, wherein the second electrode is located in the third conductive layer; a first insulation layer disposed between the active layer and the first conductive layer; a second insulation layer disposed between the first conductive layer and the second conductive layer; and a third insulation layer disposed between the second conductive layer and the third conductive layer,
wherein the second insulation layer is located in a same layer as the first light guide layer.

12. The display substrate of claim 11 , wherein one of the light-shielding layer and the first conductive layer is located in a same layer as the first light reflection layer; and/or
the first insulation layer is located in a same layer as the second light guide layer; and/or
the third insulation layer is located in a same layer as the third light guide layer; and/or
one of the second conductive layer and the third conductive layer is located in a same layer as the second light reflection layer.

13. The display substrate of claim 1 , wherein the display substrate comprises at least two partition structures, and at least one light guide structure is located between two partition structures.

14. The display substrate of claim 1 , wherein the display substrate comprises at least two light guide structures, at least one light guide structure is located on the first side of the partition structure, and at least one ligh

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sun Li

Classifications

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10D86/40

  characterised by multiple TFTs · CPC title

• H10K50/856

  comprising reflective means · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title