Display module and display device

Abstract

Embodiments of the present application provide a display module and a display device. The display module comprises a bending area and a flat area, and further comprises a support layer and an adhesive layer. The adhesive layer is at least partially arranged in the bending area, and the support layer comprises a hollow area and a non-hollow area arranged in the bending area. The hollow area comprises a main hollow area and a sub-hollow area. The adhesive layer covers the sub-hollow area, and a boundary of the adhesive layer near the main hollow area is located at a corresponding position between the main hollow area and the sub-hollow area. When bending, the hollow area can effectively reduce the stress on the adhesive layer, and prevent the adhesive layer from bulging and excessive shrinkage, thereby improving the bending performance of the display module.

Description

Technical Field

[0001] This invention relates to the field of display panel manufacturing technology, and more particularly to a display module and display device. Background Technology

[0002] With the development of display panel manufacturing technology, people have put forward higher requirements for the display effect and overall performance of display panels and display devices.

[0003] Flexible organic light-emitting diode (OLED) display technology, with its excellent response speed, high color gamut, low power consumption, and thinness, has gradually become the mainstream technology for next-generation display applications. Especially with the deepening application of small- and medium-sized OLED technology in recent years, the application fields of flexible OLED will further expand. For flexible foldable OLED products, such as flexible foldable phones, the size of the phone can be reduced through flexible folding, making it easier to carry. However, in the flexible foldable products manufactured with existing technology, each flexible foldable product has a certain film thickness, and the layers are bonded together with adhesives. After repeated folding, the adhesive between the film layers is prone to delamination and bulging under bending forces. This is especially true in the bending areas of the flexible foldable panel. When the user uses the device, the corresponding flexible screen in that area will bulge and become uneven, affecting the user experience and reducing product performance. This is detrimental to further improving the overall performance of flexible display products.

[0004] In summary, after repeated bending, existing flexible folding panels are prone to bulging and unevenness between the film layers within the bending area, which reduces the quality and overall performance of the flexible folding panels. Summary of the Invention

[0005] This invention provides a display module and display device to effectively improve the problem of bulging and unevenness between film layers in the bending area of ​​flexible display panels after multiple folds, and to effectively improve the overall performance of the display panel.

[0006] To address the aforementioned technical problems, embodiments of the present invention provide a display module and a display device. The display module includes: a bent region and a straight region disposed on at least one side of the bent region. The display module includes:

[0007] Support layer; and,

[0008] An adhesive layer is disposed on the support layer, and the adhesive layer is at least partially disposed within the bending area;

[0009] The support layer includes a hollow area corresponding to the bending area and a non-hollow area on one side of the hollow area;

[0010] The hollowed-out area includes a main hollowed-out area and a secondary hollowed-out area disposed on at least one side of the main hollowed-out area. The adhesive layer covers the secondary hollowed-out area, and the boundary of the adhesive layer on the side closer to the main hollowed-out area is located between the main hollowed-out area and the secondary hollowed-out area.

[0011] According to one embodiment of the present invention, the secondary hollow area includes at least one first secondary hollow area and at least one second secondary hollow area;

[0012] The first and second sub-cutout areas are symmetrically arranged relative to the main cutout area, and the main cutout area is correspondingly located in the middle of the bending area.

[0013] According to one embodiment of the present invention, the adhesive layer completely covers the first secondary hollow area and the second secondary hollow area, and the adhesive layer is further provided with a gap at the main hollow area, and the orthographic projection of the adhesive layer on the support layer does not overlap with the main hollow area.

[0014] According to one embodiment of the present invention, the width of the interval is greater than the width of the main hollow area.

[0015] According to one 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 the same as the distance between the other edge of the main hollow area and the edge of the adhesive layer on the same side.

[0016] According to one 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.

[0017] According to one embodiment of the present invention, the spacing between the adhesive layers is 1mm-2mm larger than the width of the main hollow area.

[0018] According to one 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.

[0019] According to one embodiment of the present invention, the width of the main hollow area is greater than the width of the first secondary hollow area, and the width of the main hollow area is greater than the width of the second secondary hollow area.

[0020] According to one embodiment of the present invention, the distance between the first secondary hollow area and one side edge of the bent area is greater than the distance between the first secondary hollow area and the main hollow area.

[0021] According to one embodiment of the present invention, the main hollow area and the secondary hollow area are spaced apart, and the hollow area includes multiple hollow patterns;

[0022] The length direction of the hollowed-out pattern is parallel to the center line of the bent area.

[0023] According to one embodiment of the present invention, the support layer further includes at least one opening;

[0024] The opening extends through the edge of the corresponding support layer within the bending area.

[0025] According to one embodiment of the present invention, on the side of the bending region near the opening, the length of the hollow pattern is greater than the length of the hollow pattern in the middle of the bending region.

[0026] According to one 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 secondary hollow area.

[0027] According to one embodiment of the present invention, the display module further includes a back plate, which is disposed on the adhesive layer.

[0028] According to one embodiment of the present invention, the thickness of the support layer is set to 70um-200um.

[0029] According to a second aspect of the present invention, a display device is also provided, comprising: the display module provided in the embodiments of this application.

[0030] The beneficial effects of this invention are as follows: Compared with the prior art, this application provides a display module and a display device. The display module includes a bent region and a straight region. It also includes a support layer and an adhesive layer. The adhesive layer is disposed on the support layer and is at least partially disposed within the bent region. The support layer includes a hollowed-out region and a non-hollowed-out region correspondingly disposed within the bent region. The hollowed-out region includes a main hollowed-out region and at least one secondary hollowed-out region. The adhesive layer at least partially covers the secondary hollowed-out region, and the adhesive layer does not overlap with the main hollowed-out region. In this application, by setting a main hollowed-out region and a secondary hollowed-out region within the bent region, and by setting an adhesive layer above the corresponding hollowed-out region, the main hollowed-out region and the secondary hollowed-out region can effectively improve the bending performance of the display module when it is bent. Meanwhile, 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 exert any effect on the adhesive layer when it is bent, and thus cannot form tensile or compressive stress on the adhesive layer. This effectively ensures the deformation matching degree between the adhesive layer and the support layer when deformation occurs, and prevents the adhesive layer from bulging and shrinking excessively, thereby effectively improving the bending performance of the display module. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A structural schematic diagram of a flexible panel provided by existing technology;

[0033] Figure 2 This is a schematic diagram of the film layer structure of a display module provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the support layer provided in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the structure of the support layer provided in an embodiment of this application;

[0036] Figure 5 for Figure 2 A cross-sectional view of the display module provided in the embodiments of this application;

[0037] Figure 6 This is a schematic diagram showing 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 in the embodiments of this application.

[0038] Figure 7A This is a schematic diagram of the structure of the display panel provided in this embodiment after bending.

[0039] Figure 7B This is a simulation diagram and its magnified effect diagram of the adhesive layer in the display film layer provided in the prior art after being bent under force.

[0040] Figure 8 This is a schematic diagram of the film structure of a display device provided in an embodiment of this application. Detailed Implementation

[0041] The following description, in conjunction with the accompanying drawings of the embodiments of the present invention, provides different implementation methods or examples to realize different structures of the present invention. To simplify the present invention, the components and arrangements of specific examples are described below. Furthermore, the various specific processes and materials provided in the present invention are examples that those skilled in the art will recognize for the application of other processes. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0043] With the continuous development of display panel manufacturing technology, people have put forward higher requirements for the performance and display effect of display panels and display devices.

[0044] Especially for bendable devices, their bending performance directly determines the user experience. For example... Figure 1 As shown, Figure 1 A schematic diagram of the structure 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 back plate 103.

[0045] The first substrate 101 is disposed on the protective layer 100, and the adhesive layer 102 is disposed on the first substrate 101. In existing products, the protective layer 100 is typically a flexible film layer to protect the flexible panel, while the first substrate 101 can serve as a support layer, such as a metal support layer, to support and fix the panel. A backplate 103 is disposed on the adhesive layer 102. The adhesive layer 102 bonds the substrate to the backplate. The display panel also includes a bending region 104 and a straight region 105. When the display panel is bent, the bending region 104 bends, and the corresponding film layer within the bending region also bends. However, in the prior art, to improve bending performance, the adhesive layer 102 is usually disconnected, such as... Figure 1 As shown in the diagram. However, when the display panel is bent repeatedly, the adhesive layer is prone to detachment at the edges of the bending area, causing air bubbles and thus reducing the bending performance of the flexible panel.

[0046] This application provides a display module and display device to effectively improve the problems of easy delamination and air bubbles in the internal film layer of flexible panels, and to effectively improve the bending performance of flexible display panels.

[0047] like Figure 2 As shown, Figure 2 This is a schematic diagram of the film layer structure of a display module provided in an embodiment of this application. The display module includes a support layer 200, an adhesive layer 102, and a back plate 103. Specifically, the support layer 200 can be disposed on the side away from the light-emitting side of the display panel. The support layer 200 serves to support and fix the module. Meanwhile, the adhesive layer 102 is disposed on the support layer 200, and the back plate 103 is disposed on the adhesive layer 102, bonding and fixing the support layer 200 and the back plate 103 together.

[0048] In this embodiment, the support layer 200 and back plate 103 are merely examples. The support layer 200 and back plate 103 primarily function to support, bend, and fix the various membrane layers. Therefore, the support layer 200 and back plate 103 can be made of membrane materials with certain rigidity and bending performance. In actual production, the support layer 200 is typically made of alloy materials; specifically, alloy steel plates or high-strength thin steel plates containing manganese can be selected. In this embodiment, the support layer 200 is preferably a high-strength thin steel plate containing manganese. When a high-strength thin steel plate is selected, the single-unit yield strength limit of the steel plate is not less than 1600 MPa, and the steel plate has good toughness. Meanwhile, the material of the back plate 103 is typically a rigid material, such as ultra-thin glass. Alternatively, the back plate 103 can be replaced with other materials with a certain degree of rigidity according to the actual product requirements, which will not be elaborated here.

[0049] Furthermore, the display module also includes a bending region 104 and a flat region 105. The flat region 105 is disposed on at least one side of the bending region 104. In this embodiment, the flat region 105 is disposed at corresponding positions on both sides of the bending region 104. When the display module is bent, bending occurs at the center of the bending region 104, causing the flat regions 105 on both sides to move relative to each other and ultimately fit together, thereby achieving the bending of the flexible module.

[0050] In this embodiment of the application, when the adhesive layer 102 is provided, the adhesive layer 102 is provided in the flat region 105, and the adhesive layer 102 is at least partially provided in the bending region 104. When bending occurs in the bending region 104, the adhesive layer 102 will bend and deform accordingly.

[0051] Furthermore, the adhesive layer 102 is broken within the bending region 104, such that there is a gap H between the adhesive layers 102 on both sides of the bending region 104. In this embodiment, the width of the gap H may be smaller than the width of the bending region 104.

[0052] Furthermore, in this embodiment of the application, when setting the support layer 200, within the bending region 104 of the display module, the support layer 200 may include multiple hollowed-out regions 2002 and multiple non-hollowed-out regions 2001. Specifically, the hollowed-out regions 2002 may be disposed on one side of the non-hollowed-out regions 2001, and the non-hollowed-out regions 2001 separate adjacent hollowed-out regions 2002. When the display panel bends in this bending region, since the material in the hollowed-out regions is removed, it is easier to bend when bending stress is applied. Therefore, in this embodiment of the application, the hollowed-out regions 2002 are provided to effectively improve the bending performance of the module.

[0053] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the support layer 200 provided in the embodiment of this application. In this embodiment, the support layer 200 corresponding to the bending region 104 is used as an example for explanation.

[0054] In this embodiment of the application, within the bending area, the support layer 200 includes a hollowed-out area and a non-hollowed-out area. Specifically, the hollowed-out area may include a main hollowed-out area FA2 and a secondary hollowed-out area disposed on at least one side of the main hollowed-out area FA2.

[0055] The secondary hollowed-out areas are illustrated using the first secondary hollowed-out area FA1 and the second secondary hollowed-out area FA3 as examples. Preferably, the main hollowed-out area FA2 and the corresponding secondary hollowed-out areas can be set to multiple, but in this embodiment, only one main hollowed-out area FA2 and two secondary hollowed-out areas are used as examples for illustration.

[0056] The first and second hollowed-out areas FA1 and FA3 are respectively disposed on both sides of the main hollowed-out area FA2. Preferably, the first and second hollowed-out areas FA1 and FA3 are symmetrically disposed relative to the main hollowed-out area FA2. In this embodiment, to achieve a good bending effect, such as forming a waterdrop screen after folding, the first and second hollowed-out areas FA1 and FA3 are symmetrically disposed relative to the main hollowed-out area FA2. This ensures that the first and second hollowed-out areas FA1 and FA3 have consistent deformation effects during bending, thereby effectively guaranteeing the bending performance of the module.

[0057] Meanwhile, to ensure good performance of the bending area 104 during bending, in this embodiment, the main hollow area FA2, the first secondary hollow area FA1, and the second secondary hollow area FA3 are symmetrically arranged relative to the center line OO' of the bending area 104. Thus, the main hollow area FA2 is directly positioned at the corresponding location in the middle of the bending area 104.

[0058] Specifically, in this embodiment, the width of the main hollow area FA2 can be greater than the width of the first secondary hollow area FA1 and the second secondary hollow area FA3, and the widths of the first secondary hollow area FA1 and the second secondary hollow area FA3 can be the same. Further, the area between the edge of the first secondary hollow area FA1 and the edge of the main hollow area FA2 is a first non-hollow area FB2, with a width of 'a'. The area between the edge of the second secondary hollow area FA3 and the edge of the main hollow area FA2 is a second non-hollow area FB3, with a width of 'b'.

[0059] In this embodiment, the width a corresponding to the first non-cutout area FB2 can be the same as the width b corresponding to the second non-cutout area FB3. By setting the widths of the two different non-cutout areas to the same width, the symmetry of the two sides of the structure is ensured. When it is bent, the consistency of its bending can be ensured, thereby improving the bending effect of the display module.

[0060] Furthermore, the area between the edge of the first hollow area FA1 and the edge of the bent area is designated as the third non-hollow area FB1, and the area between the edge of the second hollow area FA3 and the edge of the other side of the bent area is designated as the fourth non-hollow area FB4. The widths of the third non-hollow area FB1 and the fourth non-hollow area FB4 are also the same.

[0061] Therefore, in this embodiment, seven different regions are sequentially set and formed within the bending region 104: a third non-perforated region FB1, a first secondary perforated region FA1, a first non-perforated region FB2, a main perforated region FA2, a second non-perforated region FB3, a second secondary perforated region FA3, and a fourth non-perforated region FB4. When setting these regions, the number of perforated and non-perforated regions can be adjusted according to the width of the corresponding bending region 104; this will not be elaborated further here. In this embodiment, by setting multiple different perforated regions within the bending region, the multiple perforated regions can effectively reduce the bending stress required for the film layer during bending, thereby effectively improving its bending effect and performance.

[0062] Specifically, the central axis of the main hollow area FA2 can be parallel to or overlap with the bending center line OO' of the bending area, thereby ensuring symmetry during the bending process.

[0063] At the same time, the distance between the first hollow area FA1 and one edge of the bent area on the same side is greater than the distance between the first hollow area FA1 and the main hollow area FA2.

[0064] Specifically, the width of the first non-perforated area FB2 and the second non-perforated area FB3 can be set to 1mm-2mm. Preferably, it is set to 1.5mm.

[0065] In this embodiment of the application, when setting the aforementioned support layer, multiple hollow patterns 333 are provided in each hollow area. Specifically, the hollow pattern 333 can be multiple hollow strips. The shape of the hollow strip can be a long strip, a circle, an ellipse, a square, a wave shape, etc. In this embodiment of the application, a hollow strip structure is used as an example for explanation.

[0066] Furthermore, the aforementioned perforated structure can also be configured in other shapes. By setting a perforated structure on the support layer, the membrane material at the perforated structure is removed. When the membrane is bent under stress, the bending stress inside the membrane is reduced, thereby improving the bending performance and bending effect of the support layer. Furthermore, other identical or similar structures are within the scope of protection of this application and will not be elaborated upon here.

[0067] Specifically, when setting the perforated strip structure in different perforated areas, the arrangement density of the perforated strips in the main perforated area FA2 can be greater than the arrangement density in the first secondary perforated area FA1 and the second secondary perforated area FA3. In this way, more perforated strips can be set in the main perforated area FA2, while the number of perforated strips in the secondary perforated area is relatively small. When bent, the main perforated area FA2 can be bent under less force, thereby effectively improving the bending performance of the display panel.

[0068] Preferably, the density of the perforated strips in the main perforated area FA2 is twice or more than the density of the perforated strips in the first perforated area FA1 and the second perforated area FA3. This results in the corresponding film layer in this area having more perforated strips, allowing the support layer to bend under less stress when bent, thereby improving the bending performance of the support layer.

[0069] Furthermore, when setting the corresponding cutout strips within the main cutout area FA2, the cutout area of ​​each cutout strip within the main cutout area can be larger than the cutout area of ​​each cutout strip within the secondary cutout area. Specifically, the width of the cutout strips within the main cutout area FA2 is greater than the width of the cutout strips within the first secondary cutout area FA1 and the second secondary cutout area FA3. When the support layer is bent, it is easier to bend due to the larger cutout area within the central main cutout area, thereby effectively improving the bending effect of the display panel.

[0070] Furthermore, in this embodiment, when setting the corresponding hollow structures in the main hollow area and the secondary hollow area, the hollow shape corresponding to the hollow structure in the main hollow area can be the same as or different from the hollow shape corresponding to the hollow area in the secondary hollow area. For example, the hollow structures in both the main hollow area and the secondary hollow area can be set as hollow strip structures, or the hollow structure in the main hollow area can be set as a hollow strip structure, while the hollow structure in the secondary hollow area can be set as a circular or wavy structure. All of these are done to improve the bending performance of the support layer by setting hollow structures. Meanwhile, in the secondary hollow areas, the shapes of the hollow structures in multiple different secondary hollow areas can be the same or different. Specifically, in the secondary hollow areas on both sides of the main hollow area, the secondary hollow areas on both sides are symmetrically arranged relative to the main hollow area. For example, the hollow structures in the first secondary hollow area FA1 and the second secondary hollow area FA3 can both be set as hollow strip structures, thereby ensuring that the support layer has a consistent bending effect and good bending performance on both sides.

[0071] Furthermore, in this embodiment, the width of the main cutout area FA2 is set to 15mm-18mm, while the widths of the secondary cutout areas on both sides are set to 7mm-9mm respectively. Preferably, the width of the main cutout area FA2 is set to 16mm, and the width of the secondary cutout areas on both sides is set to 8mm.

[0072] like Figure 4 As shown, Figure 4 This is a schematic diagram of the support layer provided in an embodiment of this application. In this embodiment, to further improve the bending performance of the display module when setting the hollow areas, the support layer further includes at least one opening 444.

[0073] The opening 444 is located at the intersection of each perforated strip and the edge of the support layer. By providing multiple openings on the side of the support layer, these openings penetrate the corresponding edge of the support layer within the bending area. When the support layer is bent, the edges of the support layer are more easily bent because the openings are disconnected and there is no film layer connection, thus further improving the bending performance of the support layer during bending.

[0074] Furthermore, each opening 444 can be formed by a hollow strip. When preparing 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.

[0075] Furthermore, when setting the opening 444 and the perforated strip structure corresponding to the main perforated area FA2 of the support layer, in the two side edge areas 446 near the support layer, the side edge areas 446 can be close to one side of the opening 444, and the length of the perforated strip in the edge area can be greater than the length of the corresponding perforated strip in the middle area of ​​the support layer. In this way, at the edge, the length of the perforated area corresponding to each perforated strip becomes larger, and more support layer material is removed by perforation. When it is bent, the required bending stress can be further reduced, thereby improving the bending performance of the support layer.

[0076] like Figure 5 As shown, Figure 5 for Figure 2 A cross-sectional view of the display module provided in the embodiments of this application. (In conjunction with...) Figure 2 The film layer structure in this application embodiment, when setting the display module, the adhesive layer 102 is correspondingly disposed on the support layer 200, and the adhesive layer 102 is at least partially disposed within the bending region 104.

[0077] Specifically, in this embodiment, the adhesive layer 102 may include a first adhesive layer 1021 and a second adhesive layer 1022. Both the first adhesive layer 1021 and the second adhesive layer 1022 are disposed on the same layer of the support layer 200, and the first adhesive layer 1021 and the second adhesive layer 1022 are separated at least above the main cutout area FA2. Furthermore, the first adhesive layer 1021 and the second adhesive layer 1022 are at least partially disposed within the bending area 104.

[0078] Preferably, the adhesive layer covers the secondary cutout area, and the boundary of the adhesive layer near the main cutout area is located at a corresponding position between the main cutout area and the secondary cutout area. In the following embodiment, the first adhesive layer 1021 completely covers the first secondary cutout area FA1, and the second adhesive layer 1022 completely covers the second secondary cutout area FA3. Furthermore, the first adhesive layer 1021 extends to the first non-cutout area FB2, and the second adhesive layer 1022 extends to the second secondary cutout area FA3.

[0079] Furthermore, in this embodiment, the projection of the adhesive layer 102 onto the support layer 200 does not overlap with the main cutout area FA2. Specifically, the first adhesive layer 1021 does not overlap with the main cutout area FA2, and the second adhesive layer 1022 also does not overlap with the main cutout area FA2. In this embodiment, controlling the lengths of the first adhesive layer 1021 and the second adhesive layer 1022 ensures both the bonding effect on different film layers and the stress level within the adhesive layer, thereby effectively improving the bonding effect of the adhesive layer and enhancing the overall performance of the module.

[0080] Specifically, in this embodiment, 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 on one side will be described, while the other side has the same structure and will not be described again.

[0081] The interval 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 cutout area FA2 is H / 2. See details. Figure 5 In the middle structure, the distance between the edge of the first adhesive layer 1021 near the center of the bending area and the edge of the main hollow area FA2 facing the first adhesive layer 1021 is L.

[0082] In this embodiment, the width of the gap H between the first adhesive layer 1021 and the second adhesive layer 1022 is greater than the width of the main cutout area FA2. Furthermore, the first adhesive layer 1021 and the second adhesive layer 1022 do not overlap with the main cutout area FA2.

[0083] In this embodiment, when the bending area is bent, the first adhesive layer 1021 and the second adhesive layer 1022 will shrink inward. To ensure the shrinkage effect and effectively prevent the adhesive layer from delaminating and bubbling after multiple bends, in this embodiment, the distance L between one edge of the first adhesive layer 1021 and one edge of the main hollow area FA2 is set to 0.3mm-1.6mm. Preferably, the distance L is set to 0.6mm. In this embodiment, by controlling this distance L, the magnitude of the stress generated inside the adhesive layers on both sides when bending is ensured, thereby ensuring the reliability of the adhesive layers.

[0084] like Figure 6 As shown, Figure 6 This diagram illustrates the relationship between the distance from the edge of the first adhesive layer to the edge of the main cutout area and the stress within the adhesive layer, as provided in this embodiment. The dashed line in the graph represents the critical stress value corresponding to the adhesive layer, which is 0.237 MPa. When the stress is below the critical stress value, the display panel exhibits good performance; however, when the stress within the adhesive layer exceeds the critical stress value, the display panel is prone to delamination and bulging.

[0085] As can be seen from the curves in the figure, when the distance L is less than 0.3mm, significant stress will be generated inside the first adhesive layer when the display panel is bent, exceeding the safe reference value. In this case, the adhesive layer is prone to bulging.

[0086] When the distance L is greater than 0.6 mm, the stress value inside the adhesive layer tends to stabilize, and the risk of bulging and delamination of the adhesive layer is significantly reduced. Therefore, in this embodiment, the distance L can be greater than 0.3 mm, preferably 0.6 mm. In this embodiment, by setting the distance L to 0.6 mm, while ensuring good adhesion of the adhesive layer, it is also ensured that the adhesive layer experiences less stress when bent, preventing the risk of bulging and delamination. Ultimately, this effectively improves the overall performance of the display panel, including its bending performance.

[0087] Furthermore, in this embodiment of the application, the thickness of the adhesive layer 102 is set to 10um-50um. In this embodiment of the application, the thickness of the adhesive layer 102 is set to 25um, thereby effectively ensuring the performance of the adhesive layer when bent and its bonding effect.

[0088] Furthermore, such as Figure 7A As shown, Figure 7AThis is a schematic diagram of the structure of the display panel provided in this embodiment after bending. When the display panel 708 is bent, all the film layers and corresponding display modules within the panel will bend or fold accordingly. After bending, the size of the display panel 708 becomes smaller and easier to carry. In this embodiment, when the display panel 708 is bent, the deformation within the bending area 104 is relatively large. Furthermore, at the intersection of the bending area 104 and the straight area 105, such as the location corresponding to the compression area 733, the stress on the film layers is most complex. The film layers in this area, such as the adhesive layer, will be subjected to significant compressive stress. Therefore, the adhesive layer corresponding to the compression area 733 is prone to uneven deformation and easy detachment. However, in the display panel provided in this embodiment, after bending, the adhesive layer within the compression area 733 can still maintain good deformation and will not experience detachment or bulging.

[0089] At the same time, such as Figure 7B As shown, Figure 7B This is a simulation diagram and its magnified view showing the adhesive layer within the display film layer after being subjected to bending stress, as provided in the prior art. Combined with... Figure 1 The panel structure provided in the prior art and Figure 7A The diagram shows a corresponding bending of the display panel. When bent, the adhesive layer 102 undergoes compression deformation within the compression area 733 between the first substrate 101 and the back plate 103 under bending stress. In severe cases, uneven deformation occurs in the compression area 733, such as bulging or delamination, affecting the bending and bonding performance of the display panel. In this embodiment, the adhesive layer and the corresponding support layer are configured according to the above structure. When bent, the adhesive layer in the compression area 733 and other areas exhibits good deformation, and bulging or delamination does not occur within the compression area 733. Therefore, in this embodiment, the adhesive layer has a better bonding effect, and the corresponding display panel has better bending performance, effectively improving the overall performance of the panel.

[0090] In this embodiment, the display module further includes a back plate 103, which is disposed on the adhesive layer 102. During bending, the back plate 103 bends under stress. Furthermore, 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. This protective layer 400 protects the support layer 200 and improves the quality and reliability of the display module.

[0091] Specifically, in this embodiment, the adhesive layer 102 can be made of transparent optical adhesive or other transparent polymer adhesive materials. The adhesive layer 102 has good recovery properties, and when the bending area is bent, the adhesive layer 102 disposed on the hollow area can be partially compressed into the hollow strip under stress. When the stress is removed, the adhesive layer 102 returns to its original shape, thereby effectively improving its bending effect.

[0092] Furthermore, the material of the support layer 200 in this embodiment can be any one of the following materials with certain strength, bending performance and support performance: high-strength thin steel plate containing manganese, titanium alloy, carbon fiber, glass fiber and aluminum alloy, or a composite material of multiple materials, which will not be elaborated here.

[0093] like Figure 8 As shown, Figure 8 This is a schematic diagram of the film layer structure of a display device provided in an embodiment of this application. In this embodiment, the display device includes a bent region 104 and a flat region 105.

[0094] Meanwhile, the display device also includes the following film layers stacked in sequence: a protective layer 400, a support layer 200 disposed on the protective layer 400, an adhesive layer 102 disposed on the support layer 200, a back plate 103 disposed on the adhesive layer 102, a fifth adhesive layer 11 disposed on the back plate 103, a light-emitting layer 21 disposed on the fifth adhesive layer 11, a fourth adhesive layer 31 disposed on the light-emitting layer 21, a polarizer 41 disposed on the fourth adhesive layer 31, a third adhesive layer 52 disposed on the polarizer 41, an ultra-thin glass layer 12 disposed on the third adhesive layer 52, a second adhesive layer 61 disposed on the ultra-thin glass layer 12, a first protective layer 71 disposed on the second adhesive layer 61, a first adhesive layer 81 disposed on the first protective layer 71, and a cover plate 91 disposed on the first adhesive layer 81.

[0095] In this embodiment, the support layer 200, adhesive layer 102, and back plate 103 inside the display device are configured using the structure provided in this embodiment. When the display device is bent, each film layer deforms under stress. The adhesive layer 102 inside the display device is segmented on both sides of the bending area 104. When the display device is bent multiple times, the adhesive layer 102 still has good adhesion at different positions. At the same time, the display device will not detach or bulge, thereby effectively improving the bending performance of the display device.

[0096] Furthermore, the fifth adhesive layer 11, the fourth adhesive layer 31, the third adhesive layer 52, the second adhesive layer 61, and the first adhesive layer 81 in the display device can be made of the same adhesive material, such as the same optical adhesive. The thickness of each adhesive layer can be set according to actual conditions, which will not be elaborated here.

[0097] In this embodiment of the application, the display module and its corresponding display device can be any flexible and foldable product or component such as a mobile phone, computer, electronic paper, monitor, laptop, or digital photo frame, and there are no specific limitations on its specific type.

[0098] In summary, the above description provides a detailed overview of the display module and display device provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the technical solution and core ideas of the present invention. Although the present invention has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is based on the scope defined by the claims.

Claims

1. A display module, comprising a bent region and a straight region disposed on at least one side of the bent region, the display module comprising: Support layer; as well as, An adhesive layer is disposed on the support layer, and the adhesive layer is at least partially disposed within the bending area; The support layer includes a hollow area correspondingly disposed within the bending area and a non-hollow area disposed within the bending area and located on one side of the hollow area. The hollowed-out area includes a main hollowed-out area and a secondary hollowed-out area disposed on at least one side of the main hollowed-out area. The adhesive layer covers the secondary hollowed-out area, and the boundary of the adhesive layer on the side closer to the main hollowed-out area is located between the main hollowed-out area and the secondary hollowed-out area. The projection of the adhesive layer on the support layer does not overlap with the main hollowed-out area. The distance between one edge of the main hollowed-out area and the edge of the adhesive layer on the same side is set to 0.3mm-1.6mm. The material of the support layer includes at least one of manganese-containing steel plate, titanium alloy, carbon fiber, glass fiber, and aluminum alloy.

2. The display module according to claim 1, characterized in that, The secondary hollow area includes at least one first secondary hollow area and at least one second secondary hollow area; The first and second sub-cutout areas are symmetrically arranged relative to the main cutout area, and the main cutout area is correspondingly located in the middle of the bending area.

3. The display module according to claim 2, characterized in that, The adhesive layer completely covers the first and second cutout areas, and the adhesive layer is broken at least at the main cutout area, with a gap formed in the main cutout area.

4. The display module according to claim 3, characterized in that, The width of the interval is greater than the width of the main cutout area.

5. The display module according to claim 4, characterized in that, The distance between one edge of the main hollow area and the edge of the adhesive layer on the same side is the same as the distance between the other edge of the main hollow area and the edge of the adhesive layer on the same side.

6. The display module according to claim 4, characterized in that, The width of the interval is 1mm-2mm larger than the width of the main hollow area.

7. The display module according to claim 2, characterized in that, The central axis of the main hollow area is parallel to or coincides with the bending center line of the bending area.

8. The display module according to claim 2, characterized in that, The width of the main hollow area is greater than the width of the first secondary hollow area, and the width of the main hollow area is greater than the width of the second secondary hollow area.

9. The display module according to claim 2, characterized in that, The distance between the first sub-cutout area and the edge of the bent area near the first sub-cutout area is greater than the distance between the first sub-cutout area and the main cutout area.

10. The display module according to claim 2, characterized in that, A first non-hollow area is provided between the first secondary hollow area and the main hollow area, and a second non-hollow area is provided between the second secondary hollow area and the main hollow area; The adhesive layer includes a first adhesive layer and a second adhesive layer spaced apart. The first adhesive layer covers the first sub-cutout area and extends to the first non-cutout area, and the second adhesive layer covers the second sub-cutout area and extends to the second non-cutout area.

11. The display module according to claim 1, characterized in that, The main hollow area and the secondary hollow area are spaced apart, and the hollow area includes multiple hollow patterns; The length direction of the hollowed-out pattern is parallel to the center line of the bent area.

12. The display module according to claim 11, characterized in that, The support layer also includes at least one opening; The hollow pattern includes a hollow strip, the length direction of which is parallel to the center line of the bent area. The hollow strip intersects with the edge of the support layer to form the opening, and the opening passes through the edge of the support layer corresponding to the hollow area.

13. The display module according to claim 12, characterized in that, The length of the hollow pattern located on the side of the bending region closer to the opening is greater than the length of the hollow pattern in the middle of the bending region.

14. The display module according to claim 11, characterized in that, 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.

15. The display module according to claim 1, characterized in that, The display module further includes a light-emitting layer and a back plate. The back plate is disposed on the adhesive layer, and the light-emitting layer is disposed on the side of the back plate away from the adhesive layer.

16. The display module according to claim 1, characterized in that, The thickness of the support layer is set to 70um-200um.

17. A display device, characterized in that, The display device includes a display module as described in any one of claims 1-16.

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