CN-122028606-A - Display substrate, preparation method thereof and display device

CN122028606ACN 122028606 ACN122028606 ACN 122028606ACN-122028606-A

Abstract

The application provides a display substrate, a preparation method thereof and a display device. The display substrate comprises a substrate, a non-display area, a first source/drain layer, a first flat layer, a second source/drain layer, a second flat layer, a third source/drain layer, a third flat layer, a power supply wiring, a first blocking wall, a first notch, an inorganic packaging layer, a second blocking wall, a third notch and a front projection, wherein the non-display area is provided with a display area and surrounds the display area, the first peripheral area, the bending area and the second peripheral area are sequentially arranged in a direction away from the display area, the first source/drain layer, the first flat layer, the second source/drain layer, the second flat layer, the third source/drain layer, the power supply wiring comprises a first part positioned in the first peripheral area and a second part positioned at least in the first peripheral area and the bending area, the first part and the third source/drain layer are arranged in the same layer, the first blocking wall surrounds the display area, the first notch is arranged in the first peripheral area, the inorganic packaging layer is overlapped with the second part in the direction perpendicular to the substrate, the first part is in direct contact and electrically connected with the first notch, so that the front projection of the overlapped part on the substrate is positioned in the front projection of the first notch on the substrate.

Inventors

ZHANG TONG
SHA YIMING
TANG PANDENG
YANG TINGYAN
YANG XIAOYAN
YANG ZUN
ZHANG CHAOQUN
ZHANG HUIMIN
XU JINXING
LIU SHUANG
YANG KAI
LI XIPING
CHENG XUHUI
GAO XI
JIANG DAPING
LIU DAIYONG
MA XUAN

Assignees

京东方科技集团股份有限公司
成都京东方光电科技有限公司

Dates

Publication Date: 20260512
Application Date: 20241108

Claims (15)

1. A display substrate, comprising: the display device comprises a substrate, a base plate and a display unit, wherein the substrate is provided with a display area and a non-display area surrounding the display area, and the non-display area comprises a first peripheral area, a bending area and a second peripheral area which are sequentially arranged in a direction away from the display area; The first source-drain electrode layer is arranged on the substrate base plate; the first flat layer is arranged on one side of the first source-drain electrode layer, which is far away from the substrate base plate; The second source-drain electrode layer is arranged on one side of the first flat layer, which is far away from the substrate base plate; The second flat layer is arranged on one side of the second source-drain electrode layer, which is far away from the substrate base plate; the third source-drain electrode layer is arranged on one side of the second flat layer far away from the substrate base plate; The third flat layer is arranged on one side of the third source-drain electrode layer, which is far away from the substrate base plate; The display substrate comprises a power supply wiring, wherein the power supply wiring comprises a first part positioned in a first peripheral area and a second part positioned at least in the first peripheral area and a bending area, the first part and the third source drain electrode layer are arranged in the same layer, and the second part and the second source drain electrode layer are arranged in the same layer; The display device comprises a first peripheral area, a first blocking wall, a second blocking wall, a third blocking wall, a first bending area, a second bending area, a first display area, a second display area, a first display area and a second display area, wherein the first blocking wall is arranged on at least one of the first flat layer, the second flat layer and the third flat layer together; the inorganic packaging layer is arranged on one side, far away from the substrate, of the first blocking wall and covers the first blocking wall; the first part and the second part are overlapped in the direction perpendicular to the substrate and are in direct contact electrical connection to form an overlapped part, and the orthographic projection of the overlapped part on the substrate is positioned in the orthographic projection of the first groove on the substrate.
2. The display substrate of claim 1, wherein the first portion extends in a first direction and the second portion extends in the first direction, wherein an orthographic projection of the first portion on the substrate at least partially covers an orthographic projection of the second portion on the substrate, wherein the first direction is a direction extending from the display region toward the bending region, and wherein the second direction is perpendicular to the first direction.
3. The display substrate of claim 2, wherein at least a portion of the first portion is orthographic projected on the substrate in the second direction beyond the orthographic projection of the second portion on the substrate.
4. The display substrate of claim 2, wherein, in the second direction, at least a portion of the orthographic projection of the second portion on the substrate exceeds the orthographic projection of the first portion on the substrate.
5. The display substrate of claim 2, wherein a boundary of at least a portion of the first portion extending in the first direction in an orthographic projection of the substrate is flush with a boundary of at least a portion of the second portion extending in the first direction in an orthographic projection of the substrate.
6. The display substrate according to claim 2, wherein the power supply wirings include a plurality of first power supply wirings and a plurality of second power supply wirings extending along the first direction, the plurality of first power supply wirings and the plurality of second power supply wirings are spaced apart in the second direction with the first power supply wirings disposed between the plurality of second power supply wirings, and the first power supply wirings at least one end in the second direction are disposed at the overlapping portion.
7. The display substrate of claim 6, wherein each of the first power traces is provided with the overlapping portion, and each of the second power traces is provided with the overlapping portion.
8. The display substrate according to claim 7, further comprising a pixel defining layer and a light emitting functional layer stacked on a side of the third planarization layer away from the substrate, wherein the light emitting functional layer is located in the display region, and wherein an orthographic projection of the pixel defining layer on the substrate does not overlap with an orthographic projection of the first cutout on the substrate.
9. The display substrate according to claim 8, further comprising an organic encapsulation layer, wherein the orthographic projection of the organic encapsulation layer on the substrate covers the orthographic projection of the light emitting functional layer on the substrate, wherein the inorganic encapsulation layer comprises a first inorganic encapsulation layer and a second inorganic encapsulation layer which are stacked, wherein the second inorganic encapsulation layer is arranged on one side, away from the substrate, of the first inorganic encapsulation layer, and wherein the organic encapsulation layer is arranged between the first inorganic encapsulation layer and the second inorganic encapsulation layer.
10. The display substrate according to claim 9, further comprising a second barrier wall disposed on a side of the first barrier wall adjacent to the display region, the second barrier wall being disposed with at least one of the first flat layer, the second flat layer, the third flat layer, and the pixel defining layer; a second groove is formed between the second blocking wall and the first blocking wall, and the orthographic projection of the second groove on the substrate is not overlapped with the orthographic projections of the first flat layer, the second flat layer, the third flat layer and the pixel defining layer on the substrate; and a third groove is formed between the second blocking wall and the display area, and the orthographic projection of the third groove on the substrate is not overlapped with the orthographic projections of the first flat layer, the second flat layer, the third flat layer and the pixel defining layer on the substrate.
11. The display substrate of claim 1, wherein the first source-drain layer, the second source-drain layer, and the third source-drain layer are each a titanium/aluminum/titanium composite layer structure.
12. The display substrate according to any one of claims 1 to 5, further comprising a touch layer disposed on a side of the inorganic encapsulation layer away from the substrate, wherein the touch layer comprises an inorganic buffer layer, a first touch metal layer, a touch insulating layer, and a second touch metal layer disposed in a stacked manner in a direction away from the substrate, and wherein a front projection of the inorganic buffer layer on the substrate covers a front projection of at least a portion of the inorganic encapsulation layer on the substrate.
13. The display substrate of claim 12, further comprising an organic layer disposed on a side of the second touch metal layer away from the substrate, wherein an orthographic projection of the organic layer on the substrate covers an orthographic projection of at least a portion of the inorganic buffer layer on the substrate.
14. A display device comprising a display substrate according to any one of claims 1-13.
15. A method for manufacturing a display substrate, comprising: The method comprises the steps of providing a substrate, wherein the substrate is provided with a display area and a non-display area surrounding the display area, and the non-display area comprises a first peripheral area, a bending area and a second peripheral area which are sequentially arranged in a direction away from the display area; Forming a first source-drain layer on the substrate base plate; forming a first flat layer on one side of the first source drain electrode layer far away from the substrate base plate; Forming a second source drain electrode layer on one side of the first flat layer far away from the substrate base plate; forming a second flat layer on one side of the second source/drain electrode layer away from the substrate base plate; Forming a third source-drain electrode layer on one side of the second flat layer far away from the substrate base plate; Forming a third flat layer on one side of the third source/drain electrode layer far away from the substrate base plate; Forming a power supply wiring, wherein the power supply wiring comprises a first part positioned in a first peripheral area and a second part positioned at least in the first peripheral area and a bending area, the first part and the third source drain electrode layer are arranged in the same layer, and the second part and the second source drain electrode layer are arranged in the same layer; Forming a first blocking wall; the first blocking wall is arranged in the first peripheral area and surrounds the display area, the first blocking wall is arranged together with at least one of the first flat layer, the second flat layer and the third flat layer, a first groove is arranged between the first blocking wall and the bending area, and the orthographic projection of the first groove on the substrate is not overlapped with the orthographic projection of the first flat layer, the second flat layer and the third flat layer on the substrate; The inorganic packaging layer is arranged on one side of the first blocking wall far away from the substrate base plate and covers the first blocking wall; the first part and the second part are overlapped in the direction perpendicular to the substrate and are in direct contact electrical connection to form an overlapped part, and the orthographic projection of the overlapped part on the substrate is positioned in the orthographic projection of the first groove on the substrate.

Description

Display substrate, preparation method thereof and display device Technical Field The application relates to the technical field of display, in particular to a display substrate, a preparation method thereof and a display device. Background With the increasing demand of consumers for screen ratios, narrow-frame screens are becoming the mainstream of market development. In order to achieve a narrow frame effect, a bending (pad bonding) technique may be used at the frame of the display substrate. In the related art, in the bending region, the exposed organic film layer easily absorbs water vapor and is transmitted to the light-emitting functional layer through the gradient angle in the source/drain electrode layer, so that the light-emitting material is invalid. Disclosure of Invention In view of the above, the present application provides a display substrate, a method for manufacturing the same, and a display device. Based on the above object, the present application provides a display substrate comprising: the display device comprises a substrate, a base plate and a display unit, wherein the substrate is provided with a display area and a non-display area surrounding the display area, and the non-display area comprises a first peripheral area, a bending area and a second peripheral area which are sequentially arranged in a direction away from the display area; The first source-drain electrode layer is arranged on the substrate base plate; the first flat layer is arranged on one side of the first source-drain electrode layer, which is far away from the substrate base plate; The second source-drain electrode layer is arranged on one side of the first flat layer, which is far away from the substrate base plate; The second flat layer is arranged on one side of the second source-drain electrode layer, which is far away from the substrate base plate; the third source-drain electrode layer is arranged on one side of the second flat layer far away from the substrate base plate; The third flat layer is arranged on one side of the third source-drain electrode layer, which is far away from the substrate base plate; The display substrate comprises a power supply wiring, wherein the power supply wiring comprises a first part positioned in a first peripheral area and a second part positioned at least in the first peripheral area and a bending area, the first part and the third source drain electrode layer are arranged in the same layer, and the second part and the second source drain electrode layer are arranged in the same layer; The display device comprises a first peripheral area, a first blocking wall, a second blocking wall, a third blocking wall, a first bending area, a second bending area, a first display area, a second display area, a first display area and a second display area, wherein the first blocking wall is arranged on at least one of the first flat layer, the second flat layer and the third flat layer together; the inorganic packaging layer is arranged on one side, far away from the substrate, of the first blocking wall and covers the first blocking wall; the first part and the second part are overlapped in the direction perpendicular to the substrate and are in direct contact electrical connection to form an overlapped part, and the orthographic projection of the overlapped part on the substrate is positioned in the orthographic projection of the first groove on the substrate. In some embodiments, the first portion extends along a first direction, the second portion extends along the first direction, the orthographic projection of the first portion on the substrate at least partially covers the orthographic projection of the second portion on the substrate, wherein the first direction is a direction extending from the display area to the bending area, and the second direction is perpendicular to the first direction. In some of these embodiments, at least a portion of the first portion is orthographic projected on the substrate along the second direction beyond the orthographic projection of the second portion on the substrate along the second direction. In some of these embodiments, at least a portion of the second portion is projected onto the substrate in the second direction beyond the first portion. In some of these embodiments, a boundary of at least a portion of the orthographic projection of the first portion on the substrate extending along the first direction is flush with a boundary of at least a portion of the orthographic projection of the second portion on the substrate extending along the first direction. In some embodiments, the power supply wires comprise a plurality of first power supply wires and a plurality of second power supply wires extending along the first direction, the plurality of first power supply wires and the plurality of second power supply wires are distributed at intervals in the second direction, the plurality of first power supply wires are arranged among the plurality