WO2024045495A1

WO2024045495A1 - Display module and display apparatus

Info

Publication number: WO2024045495A1
Application number: PCT/CN2023/075203
Authority: WO
Inventors: 汪文强
Original assignee: 武汉华星光电半导体显示技术有限公司
Priority date: 2022-08-29
Filing date: 2023-02-09
Publication date: 2024-03-07
Also published as: CN115394197B; CN115394197A

Abstract

A display module and a display apparatus. The display module comprises a bending area (104) and a flat area (105) provided on at least one side of the bending area (104). The display module comprises: a support layer (200); and an adhesive layer (102), the adhesive layer (102) being provided on the support layer (200), and at least part of the adhesive layer (102) being provided in the bending area (104). The support layer (200) comprises a hollowed-out area (2002) correspondingly arranged in the bending area (104) and a non-hollowed-out area (2001) arranged on one side of the hollowed-out area (2002); the hollowed-out area (2002) comprises a main hollowed-out area (FA2), and auxiliary hollowed-out areas (FA1, FA3) arranged on at least one side of the main hollowed-out area (FA2); the adhesive layer (102) covers the auxiliary hollowed-out areas (FA1, FA3), and the boundary of the side of the adhesive layer (102) proximate to the main hollowed-out area (FA2) is located between the main hollowed-out area (FA2) and the auxiliary hollowed-out areas (FA1, FA3).

Description

Display modules and display devices

Technical field

The present invention relates to the technical field of manufacturing display panels, and in particular, to a display module and a display device.

Background technique

With the development of display panel preparation technology, people have put forward higher requirements for the display effect and comprehensive performance of display panels and display devices.

Flexible organic light-emitting diode (OLED) display technology has gradually become the mainstream technology for new generation display applications due to its excellent response speed, high color gamut, low power consumption and thinness. Especially with the gradual deepening of the application of small and medium-sized OLED technology in recent years, the application fields of flexible OLED will further deepen. For flexible foldable OLED products, such as flexible foldable mobile phones, the size of the mobile phone can be reduced through flexible folding, making it easier to carry. However, in the flexible folding products prepared in the prior art, since each flexible folding product has a certain film layer thickness, and the film layers are bonded through adhesive glue, after multiple foldings, the film layers will The adhesive glue is prone to degumming and bulging problems under the action of bending force, especially in the bending area of the flexible folding panel. When the user uses it, the corresponding flexible screen in this area will appear bulging and uneven. Flatness will affect the user's experience and reduce the performance of the product. It is not conducive to further improvement of the comprehensive performance of flexible display products.

Therefore, it is necessary to propose solutions to the problems in the existing technology.

technical problem

To sum up, after multiple bending of existing flexible folding panels, bulges and unevenness are likely to occur between the film layers in the panel in the bending area, thereby reducing the quality and comprehensiveness of the flexible folding panels. performance.

Technical solutions

In order to solve the above problems, embodiments of the present invention provide a display module and a display device to effectively improve the tendency of bulges and unevenness to occur between film layers in the bending area of a flexible display panel after being folded multiple times. problems and effectively improve the overall performance of the display panel.

In order to solve the above technical problems, embodiments of the present invention provide a display module and a display device. The display module includes: a bending area and a straight area provided on at least one side of the bending area. The display module Groups include:
support layer; and,
An adhesive layer, the adhesive layer is provided on the support layer, and the adhesive layer is at least partially provided in the bending area;
Wherein, the support layer includes a hollow area corresponding to the bending area and a non-hollow area arranged on one side of the hollow area;
Wherein, the hollow area includes a main hollow area and a auxiliary hollow area provided on at least one side of the main hollow area, the adhesive layer covers the auxiliary hollow area, and the adhesive layer is close to the main hollow area The boundary on one side is located between the main hollow area and the auxiliary hollow area;
Wherein, the hollow area of each hollow bar in the main hollow area is larger than the hollow area of each hollow bar in the auxiliary hollow area.

According to an embodiment of the present invention, the auxiliary hollow area includes at least a first auxiliary hollow area and at least a second auxiliary hollow area;
Wherein, the first auxiliary hollow area and the second auxiliary hollow area are arranged symmetrically with respect to the main hollow area, and the main hollow area is correspondingly arranged in the middle of the bending area.

According to a second aspect of the embodiment of the present invention, a display module is also provided. The display module includes:
support layer; and,
An adhesive layer, the adhesive layer is provided on the support layer, and the adhesive layer is at least partially provided in the bending area;
Wherein, the support layer includes a hollow area corresponding to the bending area and a non-hollow area arranged on one side of the hollow area;
Wherein, the hollow area includes a main hollow area and a auxiliary hollow area provided on at least one side of the main hollow area, the adhesive layer covers the auxiliary hollow area, and the adhesive layer is close to the main hollow area The boundary on one side is located between the main hollow area and the auxiliary hollow area.

According to an embodiment of the present invention, the adhesive layer completely covers the first auxiliary hollow area and the second auxiliary hollow area, and the adhesive layer is further provided with a gap at the main hollow area, and the The orthographic projection of the adhesive layer on the support layer does not overlap with the main hollow area.

According to an embodiment of the present invention, the width of the interval is greater than the width of the main hollow area.

According to an embodiment of the present invention, the distance from one edge of the main hollow area to the edge of the adhesive layer on the same side is equal to the distance from the other edge of the main hollow area to the edge of the adhesive layer on the same side. The distance between the edges of the joints is the same.

According to an embodiment of the present invention, the distance between one edge of the main hollow area and the edge of the adhesive layer on the same side is set to 0.3mm-1.6mm.

According to an embodiment of the present invention, the spacing distance between the adhesive layers is 1 mm-2 mm larger than the width of the main hollow area.

According to an embodiment of the present invention, the central axis of the main hollow area is parallel to or coincides with the bending center line of the bending area.

According to an embodiment of the present invention, the width of the main hollow region is greater than the width of the first auxiliary hollow region, and the width of the main hollow region is greater than the width of the second auxiliary hollow region.

According to an embodiment of the present invention, the distance between the first auxiliary hollow area and one edge of the bending area is greater than the distance between the first auxiliary hollow area and the main hollow area.

According to an embodiment of the present invention, the main hollow area and the auxiliary hollow area are arranged at intervals, and the hollow area includes a plurality of hollow patterns;
Wherein, the length direction of the hollow pattern is arranged parallel to the center line of the bending area.

According to an embodiment of the present invention, the support layer further includes at least one opening;
Wherein, the opening penetrates through the corresponding edge of the support layer in the bending area.

According to an embodiment of the present invention, the length of the hollow pattern on the side of the bending area close to the opening is greater than the length of the hollow pattern in the middle of the bending area.

According to an embodiment of the present invention, the density of the hollow pattern corresponding to the main hollow area is greater than the density of the hollow pattern corresponding to the auxiliary hollow area.

According to an embodiment of the present invention, the display module further includes a backplane, and the backplane is disposed on the adhesive layer.

According to an embodiment of the present invention, the thickness of the support layer is set to 70um-200um.

According to a third aspect of the embodiment of the present invention, a display device is also provided, including: the display module provided in the embodiment of the present application.

beneficial effects

To sum up, the beneficial effects of the embodiments of the present invention are:
Embodiments of the present application provide a display module and a display device. The display module includes a bending area and a straight area. At the same time, the display module also includes a support layer and an adhesive layer. The adhesive layer is disposed on the support layer, and the adhesive layer is at least partially disposed in the bending area. The support layer includes hollow areas and non-hollow areas correspondingly arranged in the bending area. Wherein, the hollow area includes a main hollow area and at least one auxiliary hollow area, the adhesive layer at least partially covers the auxiliary hollow area, and the adhesive layer does not overlap with the main hollow area. In the embodiment of the present application, a main hollow area and a secondary hollow area are provided in the bending area, and an adhesive layer is provided above the corresponding hollow area. When the display module is bent, the main hollow area and the auxiliary hollow area can effectively improve its bending performance. At the same time, since the orthographic projection of the adhesive layer on the support layer does not overlap with the main hollow area, the main hollow area will not have any effect on the adhesive layer when it is bent, and thus cannot pull or compress the adhesive layer. stress, thereby effectively ensuring the deformation matching between the adhesive layer and the support layer when deformed, and preventing the adhesive layer from bulging and shrinkage transition problems, thereby effectively improving the bending performance of the display module.

Description of drawings

Figure 1 is a schematic structural diagram of a flexible panel provided by the prior art;
Figure 2 is a schematic diagram of the film structure of a display module provided by an embodiment of the present application;
Figure 3 is a schematic structural diagram of the support layer provided in the embodiment of the present application;
Figure 4 is a schematic structural diagram of the support layer provided by an embodiment of the present application;
Figure 5 is a cross-sectional view of the display module provided by the embodiment of the present application in Figure 2;
Figure 6 is a schematic diagram of the relationship between the distance from the edge of the first adhesive layer to the edge of the main hollow area and the stress inside the adhesive layer provided in the embodiment of the present application;
FIG. 7A is a schematic diagram of the corresponding structure of the display panel provided in the embodiment of the present application after being bent;
Figure 7B is a simulation schematic diagram of the adhesive layer in the display film layer after bending under force and its corresponding enlarged effect diagram provided in the prior art;
FIG. 8 is a schematic diagram of the film layer structure of a display device provided by an embodiment of the present application.

Best Mode of Carrying Out the Invention

The following description of the embodiments refers to the accompanying drawings to illustrate specific embodiments in which the present disclosure may be implemented.

With the continuous development of display panel preparation technology, people have put forward higher requirements for the performance and display effect of display panels and display devices.

Especially for bendable equipment, the quality of its bending performance will directly determine the user's experience. As shown in Figure 1, Figure 1 is a schematic structural diagram of a flexible panel provided by the prior art. The flexible display panel includes a protective layer 100, a first substrate 101, an adhesive layer 102 and a backplane 103.

Wherein, the first substrate 101 is provided on the protective layer 100 , and the adhesive layer 102 is provided on the first substrate 101 . Among them, in existing products, the protective layer 100 is usually set as a flexible film layer to protect the flexible panel. At the same time, the first substrate 101 can be a support layer, such as a metal support layer, through which the first substrate 101 is used to realize the protection of the panel. Support and fixation. At the same time, the backing plate 103 is disposed on the adhesive layer 102 . The substrate and the backplane are bonded through the adhesive layer 102 . The display panel also includes a bent area 104 and a flat area 105 . When the display panel is bent, the bending area 104 is bent, and the corresponding film layer in the bending area is also bent. In the prior art, in order to improve the bending performance, the adhesive layer 102 is usually disconnected, as shown in FIG. 1 . However, when the display panel is bent multiple times, the adhesive layer is prone to debonding at the edges of the bending area and causes air bubbles, thereby reducing the bending performance of the flexible panel.

Embodiments of the present application provide a display module and a display device to effectively improve the problem of easy debonding and bubbles in the internal film layer of a flexible panel, and to effectively improve the bending performance of the flexible display panel.

As shown in Figure 2, Figure 2 is a schematic diagram of the film structure of a display module provided by an embodiment of the present application. The display module includes a support layer 200, an adhesive layer 102 and a backplane 103. Specifically, the support layer 200 may be disposed on a side away from the light emitting side of the display panel. The support layer 200 plays a supporting and fixing role. At the same time, the adhesive layer 102 is disposed on the support layer 200 , and the back plate 103 is disposed on the adhesive layer 102 . The support layer 200 and the back plate 103 are bonded and fixed through the adhesive layer 102 .

In the embodiment of the present application, the structures of the support layer 200 and the back plate 103 are only examples. The support layer 200 and the back plate 103 mainly play the role of supporting, bending, and fixing each film layer. Therefore, the support layer 200 and the back plate 103 can be made of film materials with certain rigidity and bending properties. In the actual production process, the support layer 200 is usually made of alloy material. Specifically, the alloy material can be an alloy steel plate or a manganese-containing high-strength thin steel plate. In the embodiment of the present application, the support layer 200 is preferably a high-strength thin steel plate containing manganese. When selecting a high-strength thin steel plate, the single yield strength limit of the steel plate should not be less than 1600MPa, and the steel plate should have good toughness. At the same time, the material of the back plate 103 is usually a rigid material, such as ultra-thin glass. Alternatively, the back plate 103 can be replaced with other materials with certain rigidity according to actual product requirements, which will not be described again here.

Furthermore, the display module also includes a bent area 104 and a straight area 105 . The straight area 105 is provided on at least one side of the bending area 104 . In the embodiment of the present application, the straight area 105 is provided at corresponding positions on both sides of the bending area 104 . When the display module is bent, the bending occurs at the center of the bending area 104, causing the flat areas 105 on both sides to move relative to each other, and finally the flat areas 105 on both sides fit together. Realize the bending of flexible modules.

In the embodiment of the present application, when the above-mentioned adhesive layer 102 is disposed, the adhesive layer 102 is disposed in the straight area 105, and the adhesive layer 102 is at least partially disposed in the bending area 104. When in the bending area When the adhesive layer 104 is bent, the adhesive layer 102 will be bent and deformed accordingly.

Further, the adhesive layer 102 is broken in the bending area 104, for example, there is a gap H between the adhesive layers 102 on both sides of the bending area 104. In this embodiment of the present application, the width of the interval H may be smaller than the width of the bending area 104 .

Furthermore, when disposing the support layer 200 in the embodiment of the present application, the support layer 200 may include multiple hollow areas 2002 and multiple non-hollow areas 2001 in the bending area 104 of the display module. Specifically, the hollow area 2002 can be provided on one side of the non-hollow area 2001, and at the same time, the non-hollow area 2001 separates two adjacent hollow areas 2002. When the display panel is bent in the bending area, since the material in the hollow area is removed, bending is more likely to occur when bending stress is applied to the display panel. Therefore, in the embodiment of the present application, the hollow area 2002 is provided to effectively improve the bending performance of the module.

As shown in Figure 3, Figure 3 is a schematic structural diagram of the support layer 200 provided in the embodiment of the present application. In the embodiment of the present application, the corresponding support layer 200 in the bending area 104 is taken as an example for description.

In the embodiment of the present application, within the bending area, the support layer 200 includes a hollowed area and a non-hollowed area. Specifically, the hollow area may include a main hollow area FA2 and an auxiliary hollow area provided at least on one side of the main hollow area FA2.

Wherein, the auxiliary hollow area will be described by taking the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 as an example. Preferably, the main hollow area FA2 and the corresponding auxiliary hollow areas can be provided in multiple numbers. In the embodiment of the present application, only one main hollow area FA2 and two auxiliary hollow areas are taken as an example for explanation.

Wherein, the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 are respectively provided on both sides of the main hollow area FA2. Preferably, the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 can be arranged symmetrically with respect to the main hollow area FA2. When bending the display module, if a better bending effect is obtained, such as a folding effect such as a water drop screen after folding, in the embodiment of the present application, by dividing the first hollow area FA1 and the second hollow area FA3 is arranged symmetrically with respect to the main hollow area FA2, thereby ensuring that the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 have consistent deformation effects during bending, thereby effectively ensuring the bending performance of the module.

At the same time, in order to ensure that the bending area 104 has better performance during bending, in the embodiment of the present application, the main hollow area FA2 and the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 can be bent relative to the The center line OO' of the area 104 is arranged symmetrically. In this way, the main hollow area FA2 is directly located at the corresponding position in the middle of the bending area 104 .

Specifically, in the embodiment of the present application, the width of the main hollow area FA2 may be greater than the width of the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3, and the width of the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 Widths can be the same. Further, between the edge of the first auxiliary hollow area FA1 and the edge of the main hollow area FA2 is a first non-hollow area FB2, the corresponding width of the first non-hollow area FB2 is a, and the width of the second auxiliary hollow area FA3 Between the edge and the edge of the main hollow area FA2 is a second non-hollow area FB3, and the corresponding width of the second non-hollow area FB3 is b.

In the embodiment of the present application, the width a corresponding to the first non-hollow area FB2 can be the same as the width b corresponding to the second non-hollow area FB3. By setting the corresponding widths of the two different non-hollow areas to the same width, it is ensured that The symmetry of the structures on both sides can ensure consistent bending when bending, thereby improving the bending effect of the display module.

Furthermore, the area between the edge of the first auxiliary hollow area FA1 and the edge of the bending area is correspondingly set as a third non-hollow area FB1, and the area between the edge of the second auxiliary hollow area FA3 and the edge on the other side of the bending area is correspondingly set as a third non-hollow area FB1. A corresponding fourth non-hollow region FB4 is provided, wherein the widths of the third non-hollow region FB1 and the fourth non-hollow region FB4 are also the same.

Therefore, in the embodiment of the present application, seven different areas are sequentially arranged and formed in the bending area 104: the third non-hollow area FB1, the first auxiliary hollow area FA1, the first non-hollow area FB2, and the main hollow area. FA2, the second non-hollowed area FB3, the second auxiliary hollowed-out area FA3 and the fourth non-hollowed area FB4. When setting, the above-mentioned hollow areas and non-hollow areas can also be set to other quantities according to the width of the corresponding bending area 104, which will not be described again here. In the embodiment of the present application, by arranging multiple different hollow areas in the bending area, the multiple hollow areas can effectively reduce the bending stress required when the film layer is bent, thereby effectively improving the bending effect. and performance.

Specifically, the central axis of the main hollow area FA2 may be parallel to or overlap with the bending centerline OO' of the bending area, thereby ensuring symmetry during the bending process.

At the same time, the distance between the first auxiliary hollow area FA1 and one edge of the bending area on the same side is greater than the distance between the first auxiliary hollow area FA1 and the main hollow area FA2.

Specifically, the width of the first non-hollowed area FB2 and the second non-hollowed area FB3 can be set to 1mm-2mm. Preferably, it is set to 1.5mm.

In the embodiment of the present application, when the above-mentioned support layer is provided, a plurality of hollow patterns 333 are provided in each hollow area. Specifically, the hollow pattern 333 can be a plurality of hollow strips. Wherein, the shape of the hollow strip can be a long strip, circle, oval, square, wavy and other structures. In the embodiment of the present application, the hollow strip structure is taken as an example for description.

Furthermore, the above-mentioned hollow structure can also be set in other shapes. By arranging a hollow structure on the support layer, the film layer material at the hollow structure is removed. When it bends under force, the bending stress inside the film layer is reduced. Thus, the bending performance and bending effect of the support layer can be improved. Furthermore, other identical or similar structures are within the protection scope of this application and will not be described again here.

Specifically, when arranging hollow strip structures in different hollow areas, the arrangement density of the hollow strips in the main hollow area FA2 can be greater than the arrangement density in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3. In this way, more hollow strips can be provided in the main hollow area FA2, and in the auxiliary hollow area, there are relatively few hollow strips. When they are bent, the main hollow area FA2 will bend under a smaller force. Bending can occur, thereby effectively improving the bending performance of the display panel.

Preferably, the density of the hollow strips provided in the main hollow area FA2 is twice or more than the density of the hollow strips provided in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3. This makes the corresponding film layer in this area have more hollow strips. When it is bent, the support layer can bend under the action of smaller stress, thereby improving the bending performance of the support layer.

Furthermore, when arranging the corresponding hollow strips in the main hollow area FA2, the hollow area of each hollow strip in the main hollow area can be larger than the hollow area of each hollow strip in the auxiliary hollow area. Specifically, the width of the hollow strips in the main hollow area FA2 is greater than the width of the hollow strips in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3. When the support layer is bent, since the hollow area in the central main hollow area is larger, it is easier to bend, thereby effectively improving the bending effect of the display panel.

Furthermore, in the embodiment of the present application, when the corresponding hollow structures in the main hollow area and the auxiliary hollow area are provided, the hollow shape corresponding to the hollow structure in the main hollow area can be the same as the corresponding hollow shape in the auxiliary hollow area. Or different. For example, the hollow structures in the main hollow area and the auxiliary hollow area are both set to a hollow strip structure, or the hollow structure in the main hollow area is set to a hollow strip structure, while the hollow structure in the auxiliary hollow area is set to a circular or wavy shape. structure. They all improve the bending performance of the support layer by setting up a hollow structure. At the same time, in the auxiliary hollow area, the shapes of the hollow structures in multiple different auxiliary hollow areas may be the same or different. Specifically, in the auxiliary hollow areas on both sides of the main hollow area, the auxiliary hollow areas on both sides are arranged symmetrically with respect to the main hollow area. For example, the hollow structures in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 are both arranged as The hollow strip structure ensures consistent bending effect and better bending performance on both sides of the support layer.

Further, in the embodiment of the present application, the width of the main hollow area FA2 is set to 15mm-18mm, while the width of the auxiliary hollow areas on both sides is set to 7mm-9mm respectively. Preferably, the width of the main hollow area FA2 is set to 16 mm, and the width of the auxiliary hollow areas on both sides is set to 8 mm.

As shown in Figure 4, Figure 4 is a schematic structural diagram of the support layer provided by an embodiment of the present application. In the embodiment of the present application, in order to further improve the bending performance of the display module when arranging each hollow area, in the embodiment of the present application, the support layer further includes at least one opening 444 .

Wherein, the opening 444 is provided at the position where each hollow strip intersects the edge of the support layer. By arranging a plurality of openings at the side edges of the support layer, the plurality of openings penetrate corresponding edges of the support layer in the bending area. When the support layer is bent, since the opening is disconnected and there is no connection between the film layer, the edge of the support layer is easier to bend, thereby further improving the bending of the support layer during bending. performance.

Furthermore, each opening 444 can be formed by a hollow strip. When preparing to form each opening 444, the opening 444 can be a partial hollow area of the hollow strip, and the width between two adjacent openings 444 can be the same.

Further, when arranging the above-mentioned opening 444 and the hollow strip structure corresponding to the main hollow area FA2 of the support layer, in the two side edge areas 446 close to the support layer, the two side edge areas 446 can be close to the side of the opening 444 , the length of the hollow strip at the edge region may be greater than the length of the corresponding hollow strip in the middle region of the support layer. In this way, at the edge, the length of the hollow area corresponding to each hollow strip becomes larger, and more material of the support layer is removed by hollowing out. When it is bent, the required bending stress can be further reduced, thereby improving the The bending properties of the support layer.

As shown in Figure 5, Figure 5 is a cross-sectional view of the display module provided by the embodiment of the present application in Figure 2. Combined with the film structure in Figure 2. In the embodiment of the present application, when the display module is disposed, the adhesive layer 102 is correspondingly disposed on the support layer 200 , and the adhesive layer 102 is at least partially disposed in the bending area 104 .

Specifically, in this embodiment of the present application, the adhesive layer 102 may include a first adhesive layer 1021 and a second adhesive layer 1022. The first adhesive layer 1021 and the second adhesive layer 1022 are arranged on the support layer 200 in the same layer. The first adhesive layer 1021 and the second adhesive layer 1022 are interrupted at least above the main hollow area FA2. open. And the first adhesive layer 1021 and the second adhesive layer 1022 are at least partially disposed in the bending area 104 .

Preferably, the adhesive layer covers the auxiliary hollow area, and the boundary of the adhesive layer close to the main hollow area is located at a corresponding position between the main hollow area and the auxiliary hollow area. In the following embodiments, the first adhesive layer 1021 completely covers the first auxiliary hollow area FA1, and the second adhesive layer 1022 completely covers the second auxiliary hollow area FA3. The first adhesive layer 1021 extends to the first non-hollowed area FB2, and the second adhesive layer 1022 extends to the second auxiliary hollowed area FA3.

Furthermore, in the embodiment of the present application, the projection of the adhesive layer 102 on the support layer 200 does not overlap with the main hollow area FA2. Specifically, the first adhesive layer 1021 does not overlap the main hollow area FA2, and the second adhesive layer 1022 does not overlap the main hollow area FA2. In the embodiment of the present application, the lengths of the first adhesive layer 1021 and the second adhesive layer 1022 are controlled to ensure the bonding effect on different film layers and at the same time ensure the stress formed inside the adhesive layer. , thereby effectively improving the bonding effect of the adhesive layer and improving the overall performance of the module.

Specifically, in the embodiment of the present application, the first adhesive layer 1021 and the second adhesive layer 1022 are symmetrically arranged relative to the main hollow area FA2. In the following description, only the positional relationship of one side will be described, and the other side will be described. The structures on the side are the same and will not be described again.

The distance between the first adhesive layer 1021 and the second adhesive layer 1022 is H. Therefore, the distance between the first adhesive layer 1021 and the center of the main hollow area FA2 is H/2. Referring to the structure in FIG. 5 for details, the distance between the edge of the first adhesive layer 1021 close to the center of the bending area and the edge of the main hollow area FA2 facing the first adhesive layer 1021 is L.

In the embodiment of the present application, the width of the interval H between the first adhesive layer 1021 and the second adhesive layer 1022 is greater than the width of the main hollow area FA2. And the first adhesive layer 1021 and the second adhesive layer 1022 do not overlap with the main hollow area FA2.

In the embodiment of the present application, when the bending area is bent, the first adhesive layer 1021 and the second adhesive layer 1022 will shrink inwards. In order to ensure its shrinkage effect and effectively prevent the bonding layer from degumming and bubbles after multiple bends. In the embodiment of the present application, the distance L between one side edge of the first adhesive layer 1021 and one side edge of the main hollow area FA2 is set to 0.3mm-1.6mm. Preferably, the distance L is set to 0.6mm. In the embodiment of the present application, the distance L is controlled to ensure the magnitude of stress generated inside the adhesive layers on both sides when they are bent, thereby ensuring the reliability of the adhesive layer.

As shown in FIG. 6 , FIG. 6 is a schematic diagram of the relationship between the distance from the edge of the first adhesive layer to the edge of the main hollow area and the stress inside the adhesive layer provided in the embodiment of the present application. Among them, the dotted line in the curve represents the critical stress value corresponding to the adhesive layer. Among them, the critical stress value is 0.237Mpa. When the stress value is below the critical stress value, the display panel has better performance. When the stress value in the adhesive layer is greater than the critical stress value, the display panel is prone to problems of debonding and bulging.

It can be seen from the corresponding curve relationship in the figure that when the distance L is less than 0.3 mm, when the display panel is bent, a large stress will be generated inside the first adhesive layer, exceeding the safety reference value. At this time, the adhesive layer is prone to bulge problems.

When the distance L is greater than 0.6 mm, the stress value inside the adhesive layer tends to be stable, and the risk of bulging and debonding in the adhesive layer is significantly reduced. Therefore, in the embodiment of the present application, the distance L value may be greater than 0.3 mm. Preferably it is 0.6mm. In the embodiment of the present application, by setting the distance L to 0.6 mm, on the premise of ensuring that the adhesive layer has a good bonding effect, it also ensures that when the adhesive layer is bent, relatively small Small stress prevents the risk of debonding such as bulging in the bonding layer. Ultimately, the comprehensive performance such as the bending effect of the display panel is effectively improved.

Furthermore, in the embodiment of the present application, when the adhesive layer 102 is provided, the thickness of the adhesive layer 102 is set to 10um-50um. In the embodiment of the present application, the thickness of the adhesive layer 102 is set to 25um, thereby effectively ensuring the performance of the adhesive layer during bending and its bonding effect.

Further, as shown in FIG. 7A , FIG. 7A is a schematic structural diagram of the display panel provided in the embodiment of the present application after being bent. After the display panel 708 is bent, each film layer in the panel and the corresponding display module will be bent or folded accordingly. After the display panel 708 is bent, the size of the display panel 708 becomes smaller and is easier to carry. In the embodiment of the present application, when the display panel 708 is bent, the degree of deformation is relatively large in the bending area 104 , and at the intersection of the bending area 104 and the straight area 105 , such as the corresponding position of the extrusion area 733 The stress situation of the film layer in this area is the most complex. Each film layer in this area, such as the adhesive layer, will be subject to greater extrusion stress. Therefore, the corresponding adhesive layer in the squeeze area 733 is prone to uneven deformation and debonding. After the display panel provided in the embodiment of the present application is bent, the adhesive layer in the squeeze area 733 can still maintain good deformation, and no deformation problems such as debonding and bulging will occur.

At the same time, as shown in FIG. 7B , FIG. 7B is a simulation schematic diagram and a corresponding enlarged effect diagram of the adhesive layer in the display film layer after bending under force provided in the prior art. Combining the panel structure in the prior art provided in Figure 1 and the corresponding bending schematic diagram of the display panel in Figure 7A, when it is bent, the adhesive layer 102 is between the first substrate 101 and the back plate 103 In the squeeze area 733, under the action of bending stress, the adhesive layer 102 undergoes squeeze deformation. In severe cases, the adhesive layer 102 may be unevenly deformed in the extrusion area 733 , such as bulging, debonding, etc., thereby affecting the bending and bonding effects of the display panel. In the embodiment of the present application, the adhesive layer and the corresponding support layer are arranged according to the above structure. When they are bent, the adhesive layer in the squeeze area 733 and other areas has a better deformation effect. And there will be no bulging or debonding in the squeeze area 733. Furthermore, in the embodiment of the present application, the adhesive layer has a better bonding effect, and its corresponding display panel has better bending performance. , thereby effectively improving the overall performance of the panel.

In the embodiment of the present application, the display module further includes a back plate 103. The back plate 103 is disposed on the adhesive layer 102. When bending, the back plate 103 bends under the action of stress. Further, the display module also includes a protective layer 400 . The protective layer 400 can be a flexible or rigid protective layer, such as a plastic protective film. The protective layer 400 protects the support layer 200 and improves the quality and reliability of the display module.

Specifically, in this embodiment of the present application, the material of the adhesive layer 102 may be transparent optical glue or other transparent polymer adhesive materials. The adhesive layer 102 has good recovery performance, and when the bending area is bent, the adhesive layer 102 provided on the hollow area can be partially compressed into the hollow strip under the action of stress. When the stress is removed, the adhesive layer 102 returns to its original shape. Thereby effectively improving its bending effect.

Further, the material of the support layer 200 in the embodiment of the present application can be selected from materials with certain strength, bending performance and support performance such as manganese-containing high-strength thin steel plates, titanium alloy materials, carbon fiber materials, glass fibers and aluminum alloys. Any one of them, or a composite material of multiple materials, will not be described here.

As shown in FIG. 8 , FIG. 8 is a schematic diagram of the film layer structure of a display device provided by an embodiment of the present application. In this embodiment of the present application, the display device includes a bent area 104 and a straight area 105 .

At the same time, the display device also includes the following film layers that are stacked in sequence: a substrate 400, a support layer 200 provided on the substrate 400, an adhesive layer 102 provided on the support layer 200, and an adhesive layer 102 provided on the substrate 400. the back plate 103 on the back plate 103, the fifth adhesive layer 11 provided on the back plate 103, the luminescent layer 21 provided on the fifth adhesive layer 11, the fourth adhesive layer 31 provided on the luminescent layer 21, the fourth adhesive layer 31 provided on the The polarizer 41 on the layer 31, the third glue layer 52 on the polarizer 41, the ultra-thin glass layer 12 on the third glue layer 52, and the second glue layer 61 on the ultra-thin glass layer 12 , the first protective layer 71 provided on the second glue layer 61 , the first glue layer 81 provided on the first protective layer 71 , and the cover plate 91 provided on the first glue layer 81 .

In the embodiment of the present application, the support layer 200, the adhesive layer 102 and the back plate 103 inside the display device are configured using the structure provided in the embodiment of the present application. When the above display device is bent, each film layer deforms under the action of stress, and the adhesive layer 102 in the display device is segmented on both sides of the bending area 104. When the display device has multiple When bent for the first time, the adhesive layer 102 still has good adhesion at different positions. At the same time, the display device will not debond and bulge, thereby effectively improving the bending performance of the display device.

Furthermore, the fifth glue layer 11 , the fourth glue layer 31 , the third glue layer 52 , the second glue layer 61 , and the first glue layer 81 in the display device can be made of the same adhesive material, such as the same adhesive material. Optical glue. And the thickness of each glue layer can be set according to the actual situation, which will not be described again here.

In the embodiment of the present application, the display module and its corresponding display device can be any bendable and foldable product or component such as a mobile phone, computer, electronic paper, monitor, notebook computer, digital photo frame, etc. The specific type is not specifically limited. .

To sum up, the display module and display device provided by the embodiments of the present invention are introduced in detail. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only It is used to help understand the technical solution and its core idea of the present invention; although the present invention is disclosed above in preferred embodiments, the above preferred embodiments are not used to limit the present invention. Those of ordinary skill in the art will not deviate from the spirit of the present invention. Various modifications and modifications can be made within the scope of the invention. Therefore, the protection scope of the present invention is based on the scope defined by the claims.

Claims

A display module includes a bending area and a straight area provided on at least one side of the bending area, the display module includes:

support layer; and,

An adhesive layer, the adhesive layer is provided on the support layer, and the adhesive layer is at least partially provided in the bending area;

Wherein, the support layer includes a hollow area correspondingly provided in the bending area and a non-hollow area provided on one side of the hollow area;

Wherein, the hollow area includes a main hollow area and a auxiliary hollow area provided on at least one side of the main hollow area, the adhesive layer covers the auxiliary hollow area, and the adhesive layer is close to the main hollow area The boundary on one side is located between the main hollow area and the auxiliary hollow area;

Wherein, the hollow area of each hollow bar in the main hollow area is larger than the hollow area of each hollow bar in the auxiliary hollow area.
The display module according to claim 1, wherein the auxiliary hollow area includes at least a first auxiliary hollow area and at least a second auxiliary hollow area;

Wherein, the first auxiliary hollow area and the second auxiliary hollow area are arranged symmetrically with respect to the main hollow area, and the main hollow area is correspondingly arranged in the middle of the bending area.
The display module according to claim 2, wherein the adhesive layer completely covers the first auxiliary hollow area and the second auxiliary hollow area, and the adhesive layer is further provided at the main hollow area. There is a gap.
A display module includes a bending area and a straight area provided on at least one side of the bending area. The display module includes:

support layer; and,

An adhesive layer, the adhesive layer is provided on the support layer, and the adhesive layer is at least partially provided in the bending area;

Wherein, the support layer includes a hollow area correspondingly provided in the bending area and a non-hollow area provided on one side of the hollow area;

Wherein, the hollow area includes a main hollow area and a auxiliary hollow area arranged on at least one side of the main hollow area, the adhesive layer covers the auxiliary hollow area, and the adhesive layer is close to the main hollow area The boundary on one side is located between the main hollow area and the auxiliary hollow area.
The display module according to claim 4, wherein the auxiliary hollow area includes at least a first auxiliary hollow area and at least a second auxiliary hollow area;

Wherein, the first auxiliary hollow area and the second auxiliary hollow area are arranged symmetrically with respect to the main hollow area, and the main hollow area is correspondingly arranged in the middle of the bending area.
The display module according to claim 5, wherein the adhesive layer completely covers the first auxiliary hollow area and the second auxiliary hollow area, and the adhesive layer is further provided at the main hollow area. There is a gap.
The display module according to claim 6, wherein the width of the interval is greater than the width of the main hollow area.
The display module according to claim 7, wherein the distance from one side edge of the main hollow area to the edge of the adhesive layer on the same side is the same as the distance from the other side edge of the main hollow area to the same side. The distance between the edges of the adhesive layer on both sides is the same.
The display module according to claim 8, wherein the distance between one edge of the main hollow area and the edge of the adhesive layer on the same side is set to 0.3mm-1.6mm.
The display module according to claim 7, wherein the spacing distance between the adhesive layers is 1 mm-2 mm larger than the width of the main hollow area.
The display module according to claim 5, wherein the central axis of the main hollow area is parallel to or coincides with the bending center line of the bending area.
The display module according to claim 11, wherein the width of the main hollow region is greater than the width of the first auxiliary hollow region, and the width of the main hollow region is greater than the width of the second auxiliary hollow region.
The display module according to claim 11, wherein the distance between the first auxiliary hollow area and one edge of the bending area is greater than the distance between the first auxiliary hollow area and the main hollow area. distance.
The display module according to claim 4, wherein the main hollow area and the auxiliary hollow area are arranged at intervals, and the hollow area includes a plurality of hollow patterns;

Wherein, the length direction of the hollow pattern is arranged parallel to the center line of the bending area.
The display module according to claim 14, wherein the support layer further includes at least one opening;

Wherein, the opening penetrates through the corresponding edge of the support layer in the bending area.
The display module according to claim 14, wherein the length of the hollow pattern on the side of the bending area close to the opening is greater than the length of the hollow pattern in the middle of the bending area.
The display module according to claim 14, wherein the density of the hollow pattern corresponding to the main hollow area is greater than the density of the hollow pattern corresponding to the secondary hollow area.
The display module according to claim 4, wherein the display module further includes a back plate, and the back plate is disposed on the adhesive layer.
The display module according to claim 4, wherein the thickness of the support layer is set to 70um-200um.
A display device includes a display module; the display module includes:

support layer; and,

An adhesive layer, the adhesive layer is provided on the support layer, and the adhesive layer is at least partially provided in the bending area;

Wherein, the support layer includes a hollow area correspondingly provided in the bending area and a non-hollow area provided on one side of the hollow area;

Wherein, the hollow area includes a main hollow area and a auxiliary hollow area arranged on at least one side of the main hollow area, the adhesive layer covers the auxiliary hollow area, and the adhesive layer is close to the main hollow area The boundary on one side is located between the main hollow area and the auxiliary hollow area.