Substrate and preparation method thereof, display panel and preparation method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11737308-B2
Application number	US-202217715270-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Dec 7, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A substrate and a preparation method thereof, a display panel and a preparation method thereof, and a display device are provided. The substrate includes a display region and a peripheral region positioned in a periphery of the display region and used for sealing, the substrate includes: a base substrate; an insulating layer, arranged on a side of the base substrate and positioned in the display region and the peripheral region for sealing; and a plurality of pixel units, positioned on the insulating layer corresponding to the display region, and in the peripheral region, at least one groove is disposed on a side of the insulating layer which faces away from the base substrate, a side of the groove which is away from the base substrate is open, and a depth direction of the groove is perpendicular to the base substrate.

First claim

What is claimed is:

1. A substrate, comprising a display region and a peripheral region positioned in a periphery of the display region and used for sealing, the substrate comprising:
a base substrate;
an insulating layer, arranged on a side of the base substrate and positioned in the display region and the peripheral region;
a plurality of pixel units, positioned on the insulating layer corresponding to the display region;
a pixel definition layer, positioned on the insulating layer corresponding to the display region, the pixel definition layer including a plurality of pixel openings for defining the plurality of pixel units,
wherein in the peripheral region, at least one groove is disposed on a side of the insulating layer which faces away from the base substrate,
wherein the peripheral region for sealing is a sealant set region, and
each of the plurality of pixel units includes:
a light-emitting element layer, arranged on a side of the insulating layer which faces away from the base substrate, the light-emitting element layer including a light-emitting layer,
the light-emitting layer at least covering the plurality of pixel openings,
wherein the substrate further comprises a sealant, the sealant being disposed on a side of the insulating layer away from the base substrate and a material of the sealant being distributed in the at least one groove,
wherein a shape and a size of an end of the at least one groove away from the base substrate are identical to shapes and sizes of ends of the plurality of pixel openings away from the base substrate; or
the shape of the end of the at least one groove away from the base substrate is identical to the shapes of the ends of the plurality of pixel openings away from the base substrate, the size of the end of the at least one groove away from the base substrate being greater than sizes of the ends of the plurality of pixel openings away from the base substrate.

2. The substrate according to claim 1 , wherein an extending direction of the at least one groove is parallel to a plane where the base substrate is positioned, and on a plane perpendicular to the base substrate, a longitudinal cross-section of the at least one groove is of a regular trapezoid or inverted trapezoid shape.

3. The substrate according to claim 1 , wherein the insulating layer includes a plurality of grooves in the peripheral region, each groove of plurality of grooves is one of the at least one groove,
extending directions of the plurality of grooves being identical, the plurality of grooves being arranged into a plurality of rows and a plurality of columns in the peripheral region, a row direction of the grooves being identical with a row direction of the plurality of pixel openings, and a column direction of the grooves being identical with a column direction of the pixel openings.

4. The substrate according to claim 3 , wherein the sizes of the ends of the plurality of grooves away from the base substrate are equal to the sizes of the ends of the plurality of pixel openings away from the base substrate, the shapes of the plurality of grooves are identical and the sizes of the plurality of grooves are identical, a pitch of the grooves in the row direction is identical with a pitch of the pixel openings in the row direction and/or a pitch of the grooves in the column direction is identical with that of the pixel openings in the column direction.

5. The substrate according to claim 1 , wherein a surface of the insulating layer which is positioned in the peripheral region has lyophobicity.

6. The substrate according to claim 1 , wherein at least one portion of the light-emitting layer is positioned in the groove.

7. The substrate according to claim 1 , wherein the insulating layer includes:
a first sub insulating layer, having a first groove portion; and
a second sub insulating layer, laminated on the first sub insulating layer and having an opening communicating with the first groove portion,
the first groove portion and the opening constituting the groove.

8. The substrate according to claim 7 , wherein a longitudinal cross-section of the first groove portion is of a regular trapezoid shape, and a longitudinal cross-section of the opening is of an inverted trapezoid or rectangle shape,
wherein a material of the first sub insulating layer includes a negative photoresist material, and a material of the second sub insulating layer includes a positive photoresist material or an inorganic material.

9. A display panel, comprising:
the substrate according to claim 1 ;
an opposed substrate, arranged to be opposite to the substrate; and
the sealant, disposed between the substrate and the opposed substrate,
wherein the sealant bonds the opposed substrate with the substrate.

10. A display device, comprising the display panel according to claim 9 .

11. A substrate, comprising a display region and a peripheral region positioned in a periphery of the display region and used for sealing, the substrate comprising:
a base substrate;
an insulating layer, arranged on a side of the base substrate and positioned in the display region and the peripheral region;
a plurality of pixel units, positioned on the insulating layer corresponding to the display region;
a pixel definition layer, positioned on the insulating layer corresponding to the display region, the pixel definition layer including a plurality of pixel openings for defining the plurality of pixel units,
wherein in the peripheral region, at least one groove is disposed on a side of the insulating layer which faces away from the base substrate,
wherein the peripheral region for sealing is a sealant set region, and
each of the plurality of pixel units includes:
a light-emitting element layer, arranged on a side of the insulating layer which faces away from the base substrate, the light-emitting element layer including a light-emitting layer,
the light-emitting layer at least covering the plurality of pixel openings,
wherein the substrate further comprises a sealant, the sealant being disposed on a side of the insulating layer away from the base substrate and a material of the sealant being distributed in the at least one groove,
wherein the insulating layer includes:
a first sub insulating layer, having a first groove portion; and
a second sub insulating layer, laminated on the first sub insulating layer and having an opening communicating with the first groove portion,
the first groove portion and the opening constituting the groove,

wherein a longitudinal cross-section of the first groove portion is of a regular trapezoid shape, and a longitudinal cross-section of the opening is of an inverted trapezoid or rectangle shape,
wherein a material of the first sub insulating layer includes a negative photoresist material, and a material of the second sub insulating layer includes a positive photoresist material or an inorganic material.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sun Li
• Hou Wenjun
• Luo Chengyuan

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• H10K50/8426 Primary

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

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/8722

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

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title