US-12628516-B2 - Display panel, display module and manufacturing method thereof, and display device

US12628516B2US 12628516 B2US12628516 B2US 12628516B2US-12628516-B2

Abstract

A display panel has a display area and a peripheral area including: a first fan-out region, a bending region, and a second fan-out region. The display panel includes: a substrate layer, at least one connecting lead and at least one first-type signal line. The substrate layer includes a first substrate and a second substrate. The at least one connecting lead is between the first and second substrates and extends from a side of the bending region to another side of the bending region through the bending region. The at least one first-type signal line is located on a side of the second substrate away from the first substrate. A first-type signal line is in at least one of the first fan-out region or the display area. The first-type signal line is electrically connected to a connecting lead through a via hole in the second substrate.

Inventors

Yongqiang DU
Jizhe Wang
Ying Zhang
Zhihao XIE
Hengzhen Liang

Assignees

CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220629

Claims (19)

1 . A display panel, having a display area and a peripheral area, wherein the peripheral area includes: a first fan-out region, a bending region, and a second fan-out region that are arranged on a same side of the display area and away from the display area in sequence; the display panel comprises: a substrate layer, covering the display area and the peripheral area and including a first substrate and a second substrate arranged in a stack; at least one connecting lead, located between the first substrate and the second substrate and extending from a side of the bending region proximate to the first fan-out region to a side of the bending region proximate to the second fan-out region through the bending region; and at least one first-type signal line, located on a side of the second substrate away from the first substrate, wherein a first-type signal line is located in at least one of the first fan-out region or the display area, and the first-type signal line is electrically connected to a connecting lead through a via hole in the second substrate.
2 . The display panel according to claim 1 , wherein the substrate layer further includes: a buffer layer arranged between the first substrate and the second substrate, wherein the connecting lead is located between the buffer layer and the second substrate.
3 . The display panel according to claim 2 , wherein the buffer layer has an accommodating structure, wherein the accommodating structure has an opening provided in a surface of the buffer layer facing the second substrate, at least a portion of the accommodating structure is located in the bending region, and at least a portion of the connecting lead is located in the accommodating structure.
4 . The display panel according to claim 3 , wherein the accommodating structure further has another opening provided in a surface of the buffer layer facing the first substrate.
5 . The display panel according to claim 4 , wherein the accommodating structure includes a first side wall and a second side wall, wherein the first side wall is proximate to the first fan-out region, the second side wall is proximate to the second fan-out region, and the first side wall and the second side wall define an accommodating groove, wherein the at least a portion of the connecting lead is located in the accommodating groove and is in contact with the first side wall, the second side wall and a portion of the first substrate exposed by the accommodating groove.
6 . The display panel according to claim 5 , wherein an edge of the first side wall proximate to the first substrate is a first edge, and an edge of the first side wall away from the first substrate is a second edge; and an edge of the second side wall proximate to the first substrate is a third edge, and an edge of the second side wall away from the first substrate is a fourth edge, wherein a distance between the second edge and the fourth edge is greater than a distance between the first edge and the third edge.
7 . The display panel according to claim 1 , wherein a surface of the second substrate away from the first substrate is a flat plane.
8 . The display panel according to claim 1 , further comprising: at least one gate metal layer, at least one source-drain metal layer and an anode layer that are located on the substrate layer, wherein the first-type signal line is located in any one of the at least one gate metal layer, the at least one source-drain metal layer and the anode layer.
9 . The display panel according to claim 1 , further comprising: at least one second-type signal line, located on a side of the second substrate away from the first substrate and located in the second fan-out region, wherein a second-type signal line is electrically connected to the connecting lead through another via hole in the second substrate.
10 . The display panel according to claim 1 , wherein a thickness of the first substrate is in a range of 8 μm to 10 μm, inclusive; and/or a thickness of the second substrate is in a range of 5 μm to 10 μm, inclusive.
11 . A display module, comprising: the display panel according to claim 1 ; and a first optical adhesive layer, located on a display side of the display panel, wherein the first optical adhesive layer extends from the display area of the display panel to the second fan-out region through the first fan-out region and the bending region.
12 . The display module according to claim 11 , wherein the display panel further includes a fifth edge located at a side of the second fan-out region away from the bending region, and the first optical adhesive layer includes a sixth edge proximate to the fifth edge, wherein a distance between an orthographic projection of the sixth edge on the display panel and the fifth edge is in a range of 0.1 mm to 0.25 mm, inclusive.
13 . The display module according to claim 11 , further comprising: a color filter layer, located between the display panel and the first optical adhesive layer, wherein at least the display area is within an orthographic projection of the color filter layer on the display panel; and a protective cover plate, located on a side of the first optical adhesive layer away from the display panel.
14 . The display module according to claim 11 , further comprising: a polarizer, located on a side of the first optical adhesive layer away from the display panel, wherein at least the display area is within an orthographic projection of the polarizer on the display panel; a second optical adhesive layer, located on a side of the polarizer away from the first optical adhesive layer; and a protective cover plate, located on a side of the second optical adhesive layer away from the polarizer.
15 . The display module according to claim 14 , wherein, the display panel further includes a fifth edge located a side of the second fan-out region away from the bending region; and the polarizer includes a seventh edge proximate to the fifth edge, and the second optical adhesive layer includes an eighth edge proximate to the fifth edge, wherein the eighth edge is closer to the display area than the seventh edge, and a distance between an orthographic projection of the seventh edge on the display panel and an orthographic projection of the eighth edge on the display panel is in a range of 0.1 mm to 0.25 mm, inclusive.
16 . The display module according to claim 11 , wherein the display panel includes a first portion located in the display area and the first fan-out region, a second portion located in the bending region, and a third portion located in the second fan-out region, wherein the second portion is connected between the first portion and the third portion, and the first portion is arranged opposite to the third portion; the display module further comprises: a back film, located on a non-display side of the display panel, wherein the non-display side is a side opposite to the display side; the back film includes a first sub-film and a second sub-film, wherein the first sub-film at least covers the first portion, and the second sub-film at least covers the third portion; and the first sub-film and the second sub-film have a gap therebetween, and in a direction perpendicular to the second portion, the gap at least partially overlaps the bending region; a support layer, located between the first sub-film and the second sub-film; and a bending cushion block, located between the support layer and the second sub-film.
17 . A display device, comprising: the display module according to claim 11 .
18 . The display panel according to claim 1 , wherein the first-type signal line is a data signal line, or a power signal line, or a touch lead.
19 . The display panel according to claim 5 , wherein the first side wall have slope angles being equal at various positions, and the second side wall have slope angles being equal at various positions.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a national phase entry under 35 USC 371 of International Patent Application No. PCT/CN2022/102539 filed on Jun. 29, 2022, which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display module and a manufacturing method thereof, and a display device. BACKGROUND The organic light-emitting diode (OLED) display device has a series of advantages of self-luminescence, fast response speed, high brightness, full viewing angle, applicable to flexible display, and the like, and thus becomes one of display devices with great competitiveness and development prospect. SUMMARY In an aspect, a display panel is provided. The display panel has a display area and a peripheral area. The peripheral area includes a first fan-out region, a bending region, and a second fan-out region that are arranged on a same side of the display area and away from the display area in sequence. The display panel includes: a substrate layer, at least one connecting lead and at least one first-type signal line. The substrate layer covers the display area and the peripheral area and includes a first substrate and a second substrate arranged in a stack. The at least one connecting lead is located between the first substrate and the second substrate and extends from a side of the bending region proximate to the first fan-out region to a side of the bending region proximate to the second fan-out region through the bending region. The at least one first-type signal line is located on a side of the second substrate away from the first substrate. A first-type signal line is located in at least one of the first fan-out region or the display area, and the first-type signal line is electrically connected to a connecting lead through a via hole in the second substrate. In some embodiments, the substrate layer further includes a buffer layer arranged between the first substrate and the second substrate. The connecting lead is located between the buffer layer and the second substrate. In some embodiments, the buffer layer has an accommodating structure. The accommodating structure has an opening provided in a surface of the buffer layer facing the second substrate, at least a portion of the accommodating structure is located in the bending region, and at least a portion of the connecting lead is located in the accommodating structure. In some embodiments, the accommodating structure further has another opening provided in a surface of the buffer layer facing the first substrate. In some embodiments, the accommodating structure includes a first side wall and a second side wall, where the first side wall is proximate to the first fan-out region, the second side wall is proximate to the second fan-out region, and the first side wall and the second side wall define an accommodating groove. The at least a portion of the connecting lead is located in the accommodating groove and is in contact with the first side wall, the second side wall and a portion of the first substrate exposed by the accommodating groove. In some embodiments, the first side wall have slope angles being equal at various positions, and the second side wall have slope angles being equal at various positions. In some embodiments, an edge of the first side wall proximate to the first substrate is a first edge, and an edge of the first side wall away from the first substrate is a second edge; and an edge of the second side wall proximate to the first substrate is a third edge, and an edge of the second side wall away from the first substrate is a fourth edge. A distance between the second edge and the fourth edge is greater than a distance between the first edge and the third edge. In some embodiments, a surface of the second substrate away from the first substrate is a flat plane. In some embodiments, the display panel further includes at least one gate metal layer, at least one source-drain metal layer and an anode layer that are located on the substrate layer. The first-type signal line is located in any one of the at least one gate metal layer, the at least one source-drain metal layer and the anode layer. In some embodiments, the display panel further includes at least one second-type signal line located on a side of the second substrate away from the first substrate and located in the second fan-out region. A second-type signal line is electrically connected to the connecting lead through another via hole in the second substrate. In some embodiments, a thickness of the first substrate is in a range of 8 μm to 10 μm, inclusive; and/or a thickness of the second substrate is in a range of 5 μm to 10 μm, inclusive. In some embodiments, the first-type signal line is a data signal line, or a power signal line, or a touch lead. In another aspect, a display module is provided. The display module includes the display