WO2021012412A1

WO2021012412A1 - Display panel

Info

Publication number: WO2021012412A1
Application number: PCT/CN2019/111105
Authority: WO
Inventors: 陈俊
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2019-07-25
Filing date: 2019-10-14
Publication date: 2021-01-28
Also published as: CN110491288B; CN110491288A

Abstract

Provided in the present application is a display panel, which comprises a flexible base layer and a first supporting layer; the flexible base layer comprises a first region and a bending region; at a first contact part between the first supporting layer and the bending region, one side of the first supporting layer facing the bending region is configured into a first arc-shaped structure; the first supporting layer comprises a first horizontal section and a first bending section, and the first bending section bends from the end of the first horizontal section toward the back surface of the flexible base layer to form the first arc-shaped structure.

Description

Display panel

Technical field

This application relates to a display technology, in particular to a display panel.

Background technique

Flexible display technology can better achieve narrow bezels. Especially when combined with bending technology, the binding area can be bent to the back of the display, which can significantly reduce the lower frame of the display. However, the existing bending structure has certain disadvantages, that is, the contact points between the support layer and the starting end and the ending end of the bending structure are sharp corners. Such a setting will cause metal circuit breakage at the starting point and ending point of the bending structure, resulting in a poor display screen.

technical problem

The embodiment of the present application provides a display panel to solve the technical problem of metal circuit breakage in the bending structure of the existing display panel.

Technical solutions

An embodiment of the present application provides a display panel, which includes:

A flexible base layer, the flexible base layer comprising a first area and a bending area arranged outside the first area;

The first support layer, the first support layer is arranged on the back of the first area and the partial bending area; at the first junction part of the first support layer and the bending area, the first support The side of the layer facing the bending area is arranged in a first arcuate structure;

Wherein, the first supporting layer includes a first horizontal portion and a first bending portion, the first horizontal portion is disposed on the back of the first area, and the first bending portion is derived from the first horizontal portion. The end of is bent toward the back of the flexible base layer to form the first arcuate structure;

The first supporting layer further includes a second horizontal portion, the second horizontal portion is connected to the first bent portion, and the second horizontal portion and the first horizontal portion are stacked;

The first area includes a display area and a transition area, one end of the transition area is connected to the display area, and the other end of the transition area is connected to the bending area.

In the display panel of the present application, the first horizontal portion and the second horizontal portion are fixedly connected by a first glue.

In the display panel of the present application, the flexible base layer further includes a second area, the second area is connected to the bending area, and the second area is provided with a second support layer;

In the second junction portion of the second supporting layer and the bending area, a second arc-shaped structure is provided on the side of the second supporting layer facing the bending area.

In the display panel of the present application, the second support layer includes a third horizontal portion and a second bent portion, the third horizontal portion is disposed on the back of the second area, and the second bent portion The end of the third horizontal portion is bent toward the back of the flexible base layer to form the second arc-shaped structure.

In the display panel of the present application, the second supporting layer further includes a fourth horizontal portion connected to the second bending portion, and the fourth horizontal portion and the third horizontal portion Department stacking.

In the display panel of the present application, the fourth horizontal portion and the second horizontal portion are fixedly connected by a second glue.

In the display panel of the present application, the fourth horizontal portion and the third horizontal portion are connected to form an integral structure by a third bending portion.

In the display panel of the present application, the curvature of the first arcuate structure and the curvature of the second arcuate structure are the same.

An embodiment of the present application also provides a display panel, which includes:

Wherein, the first supporting layer includes a first horizontal portion and a first bending portion, the first horizontal portion is disposed on the back of the first area, and the first bending portion is derived from the first horizontal portion. The end of is bent toward the back of the flexible base layer to form the first arc-shaped structure.

The display panel further includes a rigid substrate which is arranged on the back of the first supporting layer and corresponds to the display area.

In the display panel of the present application, the first support layer further includes a second horizontal portion connected to the first bending portion, and the second horizontal portion is connected to the first horizontal portion Cascading settings.

In the display panel of the present application, the first area includes a display area and a transition area, one end of the transition area is connected to the display area, and the other end of the transition area is connected to the bending area.

The second supporting layer includes a third horizontal portion and a second bending portion, the third horizontal portion is disposed on the back of the second area, and the second bending portion is from the end of the third horizontal portion Bending toward the back of the flexible base layer to form the second arc-shaped structure.

The bending part is arc-shaped.

The curvature of the arc of the bending portion is less than or equal to the curvature of the first arcuate structure.

In the display panel of the present application, the second arc-shaped structure is formed by bending the second bending portion from the end of the third horizontal portion to the back of the flexible base layer.

The third horizontal part and the fourth horizontal part are fixedly connected by a first glue.

Beneficial effect

Compared with the display panel of the prior art, the display panel of the present application reduces the stress on the first end and the second end of the bending area through the arrangement of the first arcuate structure and the second arcuate structure. , Thereby reducing the risk of breakage. It solves the problem of metal circuit breakage in the bending structure of the existing display panel.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following briefly introduces the drawings that need to be used in the embodiments. The drawings in the following description are only part of the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic diagram of the structure of the display panel of the first embodiment of the application;

FIG. 2 is a schematic structural diagram of a display panel according to a second embodiment of the application.

Embodiments of the invention

Please refer to the drawings in the drawings, where the same component symbols represent the same components. The following description is based on the exemplified specific embodiments of the present application, which should not be regarded as limiting other specific embodiments that are not described in detail herein.

Please refer to FIG. 1, which is a schematic structural diagram of a display panel according to a first embodiment of the application.

The display panel 100 of the first embodiment of the present application includes a flexible base layer 11, a first supporting layer 12, a second supporting layer 13, a substrate 14 and a display area 15.

The flexible base layer 11 includes a first area 1a and a bending area 1b disposed outside the first area 1a.

The first supporting layer 12 is arranged on the back of the first area 1a and the partial bending area 1b. At the first junction A between the first support layer 12 and the bending area 1b, the first support layer 12 is provided in a first arc-shaped structure 12a on the side facing the bending area 1b.

The first supporting layer 12 includes a first horizontal portion 121 and a first bending portion 122. The first horizontal portion 121 is provided on the back surface of the first area 1a. The first bending portion 122 is bent from the end of the first horizontal portion 121 toward the back of the flexible base layer 11 to form the first arcuate surface structure 12 a.

The display panel 100 is arranged by the first arc-shaped structure 12a, which reduces the stress of the first end of the bending area 1b, thereby reducing the risk of fracture. That is, the first interface A between the first support layer 12 and the bending area 1b is changed from the existing right-angle design to the arc-angle design, thereby alleviating the bending caused by the intersection of the bending area 1b and the first support layer 12 The greater the curvature, the more concentrated the stress, which reduces the risk of wire breakage at the junction of the bending area 1b and the first support layer 12.

In the first embodiment, the first bending portion 122 is bent to form the first arc-shaped structure 12a, which is simple and convenient and saves processing cost. In the first embodiment, the first end is the head end of the bending area 1b, but it is not limited to this.

The substrate 14 may be a rigid substrate, which is disposed on the back of the first support layer 12 and corresponds to the display area 15.

The first support layer 12 is disposed between the substrate 14 and the flexible substrate 11 to avoid direct contact between the substrate 14 and the flexible substrate 11, thereby preventing the right-angle structure of the substrate from abutting the flexible substrate in the prior art.

Specifically, in the first embodiment, the first supporting layer 12 further includes a second horizontal portion 123. The second horizontal portion 123 is connected to the first bending portion 122. The second horizontal portion 123 and the first horizontal portion 121 are stacked. That is, in the first supporting layer 12, the first horizontal portion 121 and the second horizontal portion 123 are integrally connected by the first bending portion 122. In addition, the first horizontal portion 121 and the second horizontal portion 123 are fixedly connected in the vertical space by the first glue 161.

In this first embodiment, the first area 1a includes a display area 1a1 and a transition area 1a2. One end of the transition area 1a2 is connected to the display area 1a1, and the other end of the transition area 1a2 is connected to the bending area 1b. The display area 15 is provided on the display area 1a1. The first area 1a is used for setting the display area 15, and the display area 15 is used for displaying pictures. The transition area 1a2 is provided with a driving circuit (not marked in the figure) electrically connected to the display area 15. A plurality of metal traces (not marked in the figure) are provided on the bending area 1b, and the plurality of metal traces are electrically connected to the driving circuit on the transition area 1a2.

In the first embodiment, the flexible base layer 11 further includes a second area 1c. The second area 1c is connected to the bending area 1b. The second area 1c is provided with a second supporting layer 13. A binding area (marked in the figure) is provided on the second area 1c. The binding area includes electronic devices such as a driving chip and connection terminals, and the binding area is electrically connected to the metal wiring.

In the second junction B of the second supporting layer 13 and the bending area 1b, the second supporting layer 13 is provided with a second arcuate structure 13a on the side facing the bending area 1b.

The display panel 100 reduces the stress at the second end of the bending area 1b by providing the second arc-shaped structure 13a, thereby reducing the risk of metal wire breakage. That is, the second interface B of the second support layer 13 and the bending area 1b is changed from the existing right-angle design to a circular arc design, thereby alleviating the problem of the interface between the bending area 1b and the second support layer 13 The bending curvature is relatively large and the stress is concentrated, thereby reducing the risk of wire breakage at the junction of the bending region 1b and the second support layer 13. Preferably, the first arcuate surface structure 12a and the second arcuate surface structure 13a have rounded corners, for example, the corners of the first support layer 12 close to the display area are also rounded corners. In the first embodiment, the second end is the end of the bending area 1b, but it is not limited to this.

The second supporting layer 13 includes a third horizontal portion 131 and a second bending portion 132. The third horizontal portion 131 is provided on the back surface of the second area 1c. The second bending portion 132 is bent from the end of the third horizontal portion 131 toward the back of the flexible base layer 11 to form a second arcuate surface structure 13 a. The second arcuate surface structure 13a formed by the bending of the second bending portion 132 is simple and convenient and saves processing cost.

In addition, optionally, there may be more than one first arc structure 12a.

The second supporting layer 13 further includes a fourth horizontal portion 133. The fourth horizontal portion 133 is connected to the second bending portion 132, and the fourth horizontal portion 133 and the third horizontal portion 133 are stacked. That is, in the second supporting layer 13, the third horizontal portion 131 and the fourth horizontal portion 133 are integrally connected by the second bending portion 132. In addition, the third horizontal portion 131 and the fourth horizontal portion 133 are fixedly connected in the level space by the first glue 161. Further, the fourth horizontal portion 133 and the second horizontal portion 123 are fixedly connected by a second glue 162. The materials of the first adhesive 161 and the second adhesive 162 may be the same or different.

The bending area 1b includes a first end portion 1b1 located at the first junction portion A, a second end portion 1b3 located at the second junction portion B, and a bending portion 1b2 connecting the first end portion 1b1 and the second end portion 1b3. Wherein, optionally, the bent portion 1b2 is in the shape of a circular arc, but of course, it can be in other arc shapes.

Specifically, in the first connecting portion A, the first end portion 1b1 is attached to the first support layer 12, because the first support layer 12 is disposed on the side facing the first end portion 1b1 as a first arcuate structure 12a Therefore, while ensuring the bending performance of the bending area 1b, the stress concentration at the junction of the bending area 1b and the first support layer 12 due to the larger bending curvature can be relieved, thereby reducing the bending area 1b and There is a risk of disconnection at the junction of the first support layer 12. Similarly, in the second connecting portion B, the second end portion 1b3 is attached to the second supporting layer 13, since the second supporting layer 13 is arranged in a second arcuate structure 13a toward the side of the second end portion 1b3, As a result, while ensuring the bending performance, the bending area 1b can relieve the stress concentration at the junction of the bending area 1b and the second support layer 13 due to the greater bending curvature, thereby reducing the bending area 1b and the second support layer. There is a risk of disconnection at the junction of the two supporting layers 13.

Wherein, the arcs of the first arcuate surface structure 12a and the second arcuate surface structure 13a are consistent with the arcs of the bending portion 1b2. Specifically, the curvature of the arc of the bent portion 1b2 is less than or equal to the curvature of the first arcuate structure 12a. Since the radius of curvature of the bending portion 1b2 is reduced, the frame of the panel is reduced.

In addition, the curvature of the first arcuate surface structure 12a and the curvature of the second arcuate surface structure 13a are the same, but not limited thereto.

Please refer to FIG. 2, which is a schematic structural diagram of a display panel according to a second embodiment of the application. The difference between the second embodiment and the first embodiment is that the fourth horizontal portion 233 and the third horizontal portion 223 are connected by a third bending portion 241 to form an integral structure. This arrangement makes the first support layer 22 and the second support layer 23 integrated, and improves the stability of the connection between the first support layer 22 and the second support layer 23.

Compared with the display panel of the prior art, the display panel of the present application reduces the stress on the first end and the second end of the bending area through the arrangement of the first arcuate structure and the second arcuate structure. , Thereby reducing the risk of breakage. The technical problem that the metal circuit breaks in the bending structure of the existing display panel is solved.

As mentioned above, for those of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solutions and technical ideas of this application, and all these changes and modifications shall belong to the appended claims of this application The scope of protection.

Claims

A display panel, which includes:

A flexible base layer, the flexible base layer comprising a first area and a bending area arranged outside the first area;

The first support layer, the first support layer is arranged on the back of the first area and the partial bending area; at the first junction part of the first support layer and the bending area, the first support The side of the layer facing the bending area is arranged in a first arcuate structure;

The first supporting layer includes a first horizontal portion and a first bending portion, the first horizontal portion is disposed on the back of the first area, and the first bending portion is from the end of the first horizontal portion Bending toward the back of the flexible base layer to form the first arcuate structure;

The first supporting layer further includes a second horizontal portion, the second horizontal portion is connected to the first bent portion, and the second horizontal portion and the first horizontal portion are stacked;

The first area includes a display area and a transition area, one end of the transition area is connected to the display area, and the other end of the transition area is connected to the bending area.
The display panel of claim 1, wherein the first horizontal portion and the second horizontal portion are fixedly connected by a first glue.
The display panel according to claim 1, wherein the flexible base layer further comprises a second area connected to the bending area, and the second area is provided with a second supporting layer;

In the second junction portion of the second supporting layer and the bending area, a second arc-shaped structure is provided on the side of the second supporting layer facing the bending area.
The display panel according to claim 3, wherein the second support layer includes a third horizontal portion and a second bent portion, the third horizontal portion is disposed on the back of the second area, and the second The bent portion is bent from the end of the third horizontal portion to the back of the flexible base layer to form the second arc-shaped structure.
The display panel according to claim 4, wherein the second support layer further comprises a fourth horizontal portion, the fourth horizontal portion is connected to the second bending portion, and the fourth horizontal portion and the The third horizontal part is stacked and arranged.
7. The display panel of claim 5, wherein the fourth horizontal portion and the second horizontal portion are fixedly connected by a second glue.
7. The display panel of claim 6, wherein the fourth horizontal portion and the third horizontal portion are connected by a third bending portion to form an integral structure.
4. The display panel of claim 3, wherein the curvature of the first arcuate structure and the curvature of the second arcuate structure are the same.
A display panel, which includes:

A flexible base layer, the flexible base layer comprising a first area and a bending area arranged outside the first area;

The first support layer, the first support layer is arranged on the back of the first area and the partial bending area; at the first junction part of the first support layer and the bending area, the first support The side of the layer facing the bending area is arranged in a first arcuate structure;

The first supporting layer includes a first horizontal portion and a first bending portion, the first horizontal portion is disposed on the back of the first area, and the first bending portion is from the end of the first horizontal portion Bending toward the back of the flexible base layer to form the first arc-shaped structure.
9. The display panel according to claim 9, wherein the first support layer further comprises a second horizontal portion, the second horizontal portion is connected to the first bending portion, and the second horizontal portion is connected to the The first horizontal part is stacked.
10. The display panel of claim 10, wherein the first horizontal portion and the second horizontal portion are fixedly connected by a first glue.
The display panel according to claim 9, wherein the first area includes a display area and a transition area, one end of the transition area is connected to the display area, and the other end of the transition area is connected to the bending area connection.
10. The display panel according to claim 10, wherein the flexible base layer further comprises a second area, the second area is connected to the bending area, and the second area is provided with a second support layer;

In the second junction portion of the second supporting layer and the bending area, a second arc-shaped structure is provided on the side of the second supporting layer facing the bending area.
The display panel according to claim 13, wherein the second support layer comprises a third horizontal portion and a second bending portion, the third horizontal portion is disposed on the back of the second area, and the second The bending part is bent from the end of the third horizontal part to the back of the flexible base layer to form the second arc-shaped structure.
The display panel according to claim 14, wherein the second support layer further comprises a fourth horizontal portion, the fourth horizontal portion is connected to the second bending portion, and the fourth horizontal portion and the The third horizontal part is stacked and arranged.
15. The display panel of claim 15, wherein the fourth horizontal portion and the second horizontal portion are fixedly connected by a second glue.
15. The display panel of claim 16, wherein the fourth horizontal portion and the third horizontal portion are connected to form an integral structure by a third bending portion.
15. The display panel of claim 13, wherein the curvature of the first arcuate structure and the curvature of the second arcuate structure are the same.