US-20260130079-A1 - DISPLAY PANEL AND METHOD FOR MANUFACTURING THE SAME, DISPLAY APPARATUS, AND TILED DISPLAY APPARATUS

Abstract

A display panel includes a backplane, a plurality of light-emitting devices, a plurality of first electrodes, and a plurality of connection leads. The backplane includes a first main surface, a second main surface and a plurality of side surfaces, and at least one side surface is a selected side surface. The plurality of light-emitting devices and the plurality of first electrodes are disposed on the second main surface. The plurality of connection leads are disposed at least on the first main surface and the selected side surface. Each connection lead includes a first portion on the first main surface and a second portion on the selected side surface, and a ratio of a thickness of the first portion to a thickness of the second portion is in a range of 0.6 and 1.6. Each connection lead is electrically connected to a first electrode.

Inventors

• Linhui Gong
• Chao Liu
• Haiwei SUN
• Chuhang Wang
• Lili Wang
• Chaoyang Wang
• Xue DONG

Assignees

• BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date

20260507

Application Date

20251230

Priority Date

20200924

Claims (20)

1. 1 . A display panel, comprising: a backplane, the backplane including a first main surface and a second main surface that are opposite to each other, and a plurality of side surfaces each connecting the first main surface and the second main surface; at least one side surface in the plurality of side surfaces being a selected side surface; a plurality of light-emitting devices disposed on the second main surface of the backplane; a plurality of first electrodes disposed on the second main surface of the backplane; the plurality of first electrodes being closer to the selected side surface than the plurality of light-emitting devices, and the plurality of first electrodes being electrically connected to the plurality of light-emitting devices; and a plurality of connection leads disposed at least on the first main surface and the selected side surface of the backplane; each connection lead in the plurality of connection leads including a first portion located on the first main surface and a second portion located on the selected side surface; the connection lead passing through the selected side surface from the first main surface to be electrically connected to a first electrode in the plurality of first electrodes, and the connection lead being not in contact with an end of the first electrode in the plurality of first electrodes away from the selected side surface.
2. 2 . The display panel according to claim 1 , wherein the selected side surface includes a side sub-surface substantially perpendicular to the first main surface and the second main surface, and a first transition sub-surface connecting the first main surface and the side sub-surface; in a cross section of the backplane perpendicular to the first main surface and perpendicular to an edge of the backplane where the side sub-surface is located, an included angle between a tangent at any point on the first transition sub-surface and the first main surface is greater than 90°, and another included angle between the tangent at any point on the first transition sub-surface and the side sub-surface is greater than 90°; and the connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface to be electrically connected to the first electrode in the plurality of first electrodes.
3. 3 . The display panel according to claim 2 , wherein an end of the first electrode proximate to the selected side surface is substantially flush with a side edge of the second main surface proximate to the selected side surface; and the connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface, and extends to the side edge of the second main surface proximate to the selected side surface to be electrically connected to the first electrode.
4. 4 . The display panel according to claim 2 , wherein an end of the first electrode proximate to the selected side surface and a side edge of the second main surface proximate to the selected side surface have a distance therebetween; the connection lead further includes a third portion located on the second main surface, and a ratio of a thickness of the third portion to the thickness of the second portion is in a range of 0.6 and 1.6, inclusive; and the connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface, and extends to the second main surface to be electrically connected to the first electrode.
5. 5 . The display panel according to claim 2 , wherein the selected side surface further includes a second transition sub-surface connecting the side sub-surface and the second main surface; in the cross section of the backplane perpendicular to the first main surface and perpendicular to the edge of the backplane where the side sub-surface is located, an included angle between a tangent at any point on the second transition sub-surface and the second main surface is greater than 90°, and an included angle between the tangent at any point on the second transition sub-surface and the side sub-surface is greater than 90°; and the connection lead passes through the first transition sub-surface, the side sub-surface and the second transition sub-surface of the selected side surface in sequence from the first main surface to be electrically connected to the first electrode.
6. 6 . The display panel according to claim 1 , wherein a ratio of a thickness of the first portion to a thickness of the second portion is in a range of 0.6 to 1.6, inclusive; the thickness of the first portion is a thickness at a position of at least part of the first portion in a direction perpendicular to the first main surface; and the thickness of the second portion is a thickness at a position of at least part of the second portion in a direction perpendicular to the first main surface.
7. 7 . The display panel according to claim 1 , further comprising a plurality of second electrodes disposed on the first main surface, wherein each connection lead in the plurality of connection leads is electrically connected to a second electrode in the plurality of second electrodes; or the display panel further comprising the plurality of second electrodes disposed on the first main surface, wherein each connection lead in the plurality of connection leads is electrically connected to the second electrode in the plurality of second electrodes; and orthographic projections, on the first main surface, of a first electrode and a second electrode that are electrically connected to a same connection lead at least partially overlap.
8. 8 . The display panel according to claim 1 , wherein the first main surface of the backplane has a bonding region; and portions of the plurality of connection leads located on the first main surface extend to the bonding region.
9. 9 . The display panel according to claim 8 , wherein a length of the bonding region is substantially equal to a length of a side edge of the first main surface proximate to the selected side surface; and in a direction from the side edge of the first main surface proximate to the selected side surface to the bonding region, the portions of the plurality of connection leads located on the first main surface extend to the bonding region; or the length of the bonding region is less than the length of the side edge of the first main surface proximate to the selected side surface; and in the direction from the side edge of the first main surface proximate to the selected side surface to the bonding region, the portions of the plurality of connection leads located on the first main surface converge on the bonding region.
10. 10 . The display panel according to claim 1 , further comprising a plurality of signal lines disposed on the second main surface of the backplane; the plurality of first electrodes are electrically connected to the plurality of light-emitting devices through the plurality of signal lines; a width of the first electrode is substantially same as a width of a signal line electrically connected thereto; and the connection lead further includes a third portion located on the second main surface, a width of the third portion is substantially same as a width of a signal line electrically connected thereto.
11. 11 . The display panel according to claim 10 , wherein a width of the first portion of the connection lead is substantially same as the width of the third portion of the connection lead; and a width of the second portion of the connection lead is greater than the width of the first portion of the connection lead and greater than the width of the third portion of the connection lead.
12. 12 . The display panel according to claim 2 , wherein the at least one side surface as the selected side surface includes at least two side surfaces as selected side surfaces; portions of at least part of the plurality of connection leads located on a same selected side surface are arranged at equal intervals in a direction parallel to an edge of the backplane where a side sub-surface of the same selected side surface is located; and a distance between two adjacent connection leads in connection leads located on a selected side surface in the at least two side surfaces is different from another distance between two adjacent connection leads in connection leads located on another selected side surface in the at least two side surfaces.
13. 13 . The display panel according to claim 1 , further comprising an energy absorbing film disposed between the backplane and the plurality of connection leads; or the display panel further comprising the energy absorbing film disposed between the backplane and the plurality of connection leads, a material of the energy absorbing film including at least one of tin dioxide and zinc oxide.
14. 14 . The display panel according to claim 1 , wherein each connection lead in the plurality of connection leads includes a first buffer conductive pattern, a main conductive pattern and a second buffer conductive pattern that are sequentially stacked, and the first buffer conductive pattern is closer to the backplane than the main conductive pattern; adhesion between the first buffer conductive pattern and the backplane is greater than adhesion between the main conductive pattern and the backplane; and oxidation resistance of the second buffer conductive pattern is greater than oxidation resistance of the main conductive pattern.
15. 15 . The display panel according to claim 14 , wherein a material of the first buffer conductive pattern is same as a material of the second buffer conductive pattern, and the material of the first buffer conductive pattern and the material of the second buffer conductive pattern each include at least one of titanium, germanium, molybdenum and molybdenum-niobium alloy.
16. 16 . The display panel according to claim 1 , further comprising a first protective adhesive layer, wherein the first protective adhesive layer covers the plurality of connection leads.
17. 17 . The display panel according to claim 1 , further comprising a second protective adhesive layer disposed on a side of the plurality of light-emitting devices facing away from the backplane, wherein the second protective adhesive layer covers the plurality of light-emitting devices and the plurality of first electrodes, and fills gap regions between the plurality of light-emitting devices and the plurality of first electrodes.
18. 18 . A display apparatus, comprising: the display panel according to claim 1 ; and a driver chip, the driver chip being disposed on the first main surface of the backplane of the display panel, and the driver chip being electrically connected to the plurality of first electrodes in the display panel through the plurality of connection leads in the display panel.
19. 19 . The display apparatus according to claim 18 , wherein the display panel further includes a plurality of second electrodes disposed on the first main surface, each connection lead in the plurality of connection leads is electrically connected to a second electrode in the plurality of second electrodes, and the driver chip is electrically connected to the plurality of second electrodes; or the driver chip is electrically connected to a portion of each of the plurality of connection leads located on the first main surface of the backplane.
20. 20 . A tiled display apparatus comprising a plurality of display apparatuses according to claim 18 , and the plurality of display apparatuses being tiled together.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 17/926,791, filed on Nov. 21, 2022, which is a national phase entry under 35 USC 371 of International Patent Application No. PCT/CN2021/111259, filed on Aug. 6, 2021, which claims priority to Chinese Patent Application No. 202011020278.7, filed on Sep. 24, 2020, which are incorporated herein by reference in their entirety. TECHNICAL FIELD The present disclosure relates to the field of display technologies, and in particular, to a display panel and a method for manufacturing the same, a display apparatus and a tiled display apparatus. BACKGROUND A mini organic light-emitting diode (mini OLED) display apparatus has advantages of high brightness, clear display pictures and low power consumption, and has a good application prospect. It may be applied in a large-scale tiled display apparatus, and a size of a seam in the tiled display apparatus is a major factor affecting the display effect. Therefore, a display apparatus with a narrow bezel becomes one of development trends. SUMMARY In an aspect, a display panel is provided. The display panel includes a backplane, a plurality of light-emitting devices, a plurality of first electrodes and a plurality of connection leads. The backplane includes a first main surface and a second main surface that are opposite to each other, and a plurality of side surfaces each connecting the first main surface and the second main surface. At least one side surface in the plurality of side surfaces is a selected side surface. The plurality of light-emitting devices are disposed on the second main surface of the backplane. The plurality of first electrodes are disposed on the second main surface of the backplane. The plurality of first electrodes are closer to the selected side surface than the plurality of light-emitting devices, and the plurality of first electrodes are electrically connected to the plurality of light-emitting devices. The plurality of connection leads are disposed at least on the first main surface and the selected side surface of the backplane. Each connection lead in the plurality of connection leads includes a first portion located on the first main surface and a second portion located on the selected side surface, and a ratio of a thickness of the first portion to a thickness of the second portion is in a range of 0.6 to 1.6, inclusive. The connection lead passes through the selected side surface from the first main surface to be electrically connected to a first electrode in the plurality of first electrodes. In some embodiments, the selected side surface includes a side sub-surface substantially perpendicular to the first main surface and the second main surface, and a first transition sub-surface connecting the first main surface and the side sub-surface. In a cross-section of the backplane perpendicular to the first main surface and perpendicular to an edge of the backplane where the side sub-surface is located, an included angle between a tangent at any point on the first transition sub-surface and the first main surface is greater than 90°, and another included angle between the tangent at any point on the first transition sub-surface and the side sub-surface is greater than 90°. The connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface to be electrically connected to the first electrode in the plurality of first electrodes. In some embodiments, an end of the first electrode proximate to the selected side surface is substantially flush with a side edge of the second main surface proximate to the selected side surface. The connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface, and extends to the side edge of the second main surface proximate to the selected side surface to be electrically connected to the first electrode. In some embodiments, an end of the first electrode proximate to the selected side surface and a side edge of the second main surface proximate to the selected side surface have a distance therebetween. The connection lead further includes a third portion located on the second main surface, and a ratio of a thickness of the third portion to a thickness of the second portion is in a range of 0.6 to 1.6, inclusive. The connection lead passes through the first transition sub-surface and the side sub-surface of the selected side surface in sequence from the first main surface, and extends to the second main surface to be electrically connected to the first electrode. In some embodiments, the selected side surface further includes a second transition sub-surface connecting the side sub-surface and the second main surface. In the cross-section of the backplane perpendicular to the first main surface and perpendicular to the edge o