Display module and display device

Abstract

The invention provides a display module and a display device.The display module comprises a cover plate assembly arranged on the light emitting side of a display panel, the cover plate assembly comprises a first protection layer and a cover plate layer located on the side, close to the display panel, of the first protection layer, and the elasticity modulus of the cover plate layer is larger than that of the first protection layer; the orthographic projection of the cover plate layer on the first protective layer covers the orthographic projection of the bending part of the display panel on the first protective layer, and the film layer structure of the cover plate layer close to the first plane part of the display panel is different from the film layer structure of the cover plate layer close to the bending part of the display panel, so that the narrow frame is realized; the folding performance of the cover plate assembly in the display area and the supporting performance of the cover plate assembly in the first frame area are both considered, and adhesion between the cover plate assembly and the bending part is avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panel has the characteristics of self-luminescence, wide viewing angle, short response time, high luminous efficiency, wide color gamut, low operating voltage, and flexibility. It is considered to be the most promising new display panel. Among them, the flexibility of the OLED display panel can realize a display device with a fixed curved surface and a foldable display device. In addition, the flexible OLED display panel can bend the fan-out wiring, binding area, flexible printed circuit board (Flexible Print Circuit, FPC) and other structures to the back side of the display screen through the pad bending process to form a bent portion, so as to reduce the frame size of the flexible OLED display device and achieve a high screen-to-body ratio. However, in order to protect and hide the bent portion of the flexible OLED display panel, it is necessary to set a decorative frame above the bent portion, and the presence of the decorative frame is not conducive to further reducing the frame. Summary of the invention

[0003] The present application provides a display module and a display device, so as to eliminate the decorative frame above the bending portion and realize a narrow frame.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] An embodiment of the present application provides a display module, which includes a display area and a first frame area located outside the display area; the display module also includes:

[0006] A display panel having a light emitting side and a back side opposite to each other, the display panel comprising a first plane portion, a second plane portion, and a bending portion connected between the first plane portion and the second plane portion, the second plane portion being bent to the back side of the first plane portion through the bending portion, and at least a portion of the bending portion being located within the first frame area;

[0007] a cover plate assembly, arranged on the light-emitting side of the display panel, the cover plate assembly comprising a first protective layer and a cover plate layer located on a side of the first protective layer close to the display panel, the cover plate layer being bonded to the first protective layer, the cover plate layer being arranged corresponding to the display area, and extending from the display area to the first frame area;

[0008] Among them, the elastic modulus of the cover layer is greater than the elastic modulus of the first protective layer, the orthographic projection of the cover layer on the first protective layer covers the orthographic projection of the bending portion on the first protective layer, and the film layer structure of the cover layer close to the first plane portion is different from the film layer structure of the cover layer close to the bending portion.

[0009] In the display module provided in the embodiment of the present application, the boundary of the cover layer in the first direction exceeds the boundary of the bent portion in the first direction, and the first direction is the relative position setting direction of the display area and the first frame area;

[0010] The display module further includes a second protective layer covering the bent portion, and an orthographic projection of the second protective layer on the first protective layer is located within an orthographic projection of the cover layer on the first protective layer.

[0011] In the display module provided in the embodiment of the present application, the cover layer includes a transparent polyimide sublayer and an isolation sublayer located on a side of the transparent polyimide sublayer close to the bending portion, and the isolation sublayer is arranged opposite to the second protective layer.

[0012] In the display module provided in the embodiment of the present application, the cover layer includes a first sublayer and a second sublayer, the first sublayer is attached to the first protective layer, and the second sublayer is located on a side of the first sublayer away from the first protective layer;

[0013] The display module further includes a foldable area located within the display area, the first sub-layer is provided with a groove at a position corresponding to the foldable area, and the second sub-layer is filled in the groove.

[0014] In the display module provided in the embodiment of the present application, the first sub-layer includes an upper surface, a lower surface and a plurality of side surfaces connected between the upper surface and the lower surface, the lower surface is located on a side of the upper surface away from the first protective layer, and the second sub-layer covers the lower surface and the plurality of side surfaces;

[0015] The cover plate layer further includes an isolation sublayer located on a side of the second sublayer close to the bending portion, and the isolation sublayer is arranged opposite to the second protective layer.

[0016] In the display module provided in the embodiment of the present application, within the first border area, the boundary of the first sublayer in the first direction exceeds the boundary of the second sublayer in the first direction, and the boundary of the second protective layer close to the first planar portion is located between the boundary of the first sublayer and the boundary of the second sublayer.

[0017] In the display module provided in the embodiment of the present application, the material of the first sub-layer includes ultra-thin glass, and the material of the second sub-layer includes a high molecular polymer.

[0018] In the display module provided in the embodiment of the present application, a boundary of the isolation sublayer close to the display area exceeds a boundary of the second protection layer close to the display area.

[0019] In the display module provided in the embodiment of the present application, the cover assembly further includes:

[0020] A light shielding layer, disposed on a side of the first protective layer close to the cover layer and located within the first frame area;

[0021] A hard coating layer is disposed on a side of the first protective layer away from the cover layer, the hard coating layer is located in the display area, and extends from the display area to the first frame area;

[0022] The material of the light-shielding layer includes black ink, the material of the isolation sublayer is the same as that of the light-shielding layer, and the orthographic projection of the isolation sublayer on the first protective layer is within the orthographic projection of the light-shielding layer on the first protective layer.

[0023] In the display module provided in the embodiment of the present application, the cover plate assembly further includes a third protective layer, the third protective layer is arranged between the cover plate layer and the display panel, and the third protective layer is spaced apart from the second protective layer.

[0024] In the display module provided in the embodiment of the present application, the material of the first protective layer includes one of transparent polyimide and polyethylene terephthalate, the material of the second protective layer includes UV glue, and the material of the third protective layer includes one of transparent polyimide, ultra-thin glass, and polyethylene terephthalate.

[0025] An embodiment of the present application further provides a display device, which includes the display module described in one of the aforementioned embodiments.

[0026] The beneficial effects of the present application are as follows: in the display module and display device provided by the present application, the display module includes a cover plate assembly arranged on the light-emitting side of the display panel, the cover plate assembly includes a first protective layer and a cover plate layer, the cover plate layer is located between the first protective layer and the display panel, the elastic modulus of the cover plate layer is greater than the elastic modulus of the first protective layer, the orthographic projection of the cover plate layer on the first protective layer covers the orthographic projection of the bent portion of the display panel on the first protective layer, and the film layer structure of the first plane portion of the cover plate layer close to the display panel is different from the film layer structure of the bent portion of the cover plate layer close to the display panel. In this way, by making the cover plate layer and the first protective layer cover the bent portion and performing a differentiated design on the cover plate layer, the decorative frame located above the bent portion can be eliminated, and while achieving a narrow frame, the folding performance of the cover plate assembly in the display area and the supporting performance in the first frame area are taken into account, and adhesion of the cover plate assembly to the bent portion can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a partial cross-sectional structural schematic diagram of the display module provided in the preamble of the embodiments of the present application.

[0029] Figure 2 This is a schematic diagram of a first cross-sectional structure of a display module provided in an embodiment of the present application.

[0030] Figure 3 A schematic diagram of a second cross-sectional structure of a display module provided in an embodiment of the present application.

[0031] Figure 4 for Figure 3 Schematic diagram of the detailed structure of the middle cover layer.

[0032] Figure 5 A third cross-sectional structural schematic diagram of the display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and regions is exaggerated for clear understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0034] In view of the problem that a decoration frame is provided above the bending portion of the flexible OLED display panel, which is not conducive to further reducing the frame, the inventors of the present application found in their research that: Figure 1 , Figure 1 A schematic diagram of a partial cross-sectional structure of a display module provided in the preamble of an embodiment of the present application. The display module includes a display panel 1' and a cover assembly 2' disposed on the light-emitting side of the display panel 1', the cover assembly 2' including a first protective layer 20' and a cover layer 30'. The display panel 1' includes a first planar portion 11', a second planar portion 12', and a bending portion 13' connected between the first planar portion 11' and the second planar portion 12'. The display panel 1' is a flexible display panel, so that the second planar portion 12' can be bent to the back of the display panel 1' through the bending portion 13' to reduce the frame.

[0035] In order to protect and hide the bending portion 13', the display module also includes a decorative frame 3' arranged above the bending portion 13', and the decorative frame 3' is overlapped above the cover assembly 2'. The existence of the decorative frame 3' is not conducive to further reducing the border of the display module, and there is a gap between the decorative frame 3' and the cover assembly 2', which causes the border of the display module to become further larger visually.

[0036] To this end, the present application provides a display module and a display device.

[0037] Please refer to Figure 1 and Figure 2 , Figure 2 This is a schematic diagram of a first cross-sectional structure of a display module provided in an embodiment of the present application. Figure 2 The display module 100 includes a display area AA and a first frame area BA1 located outside the display area AA, the display area AA is used to display images, and the first frame area BA1 is used to set a binding structure, a peripheral circuit, etc. Optionally, the display module 100 also includes a second frame area BA2 opposite to the first frame area BA1, and the display area AA is connected between the first frame area BA1 and the second frame area BA2.

[0038] The display module 100 further includes a display panel 1 and a cover plate assembly 2 disposed on the light emitting side of the display panel 1. The cover plate assembly 2 includes a first protective layer 20 and a cover plate layer 30 disposed on the first protective layer 20 close to the display panel 1. The display panel 1 has a light emitting side and a back side opposite to each other, the light emitting side being the side of the display panel 1 displaying an image, and the back side being the side of the display panel 1 away from the light emitting side.

[0039] The display panel 1 includes a flexible organic light emitting diode (OLED) display panel, etc. When the display panel 1 is a flexible organic light emitting diode display panel, the display panel 1 may include a substrate and a driving circuit layer, a light emitting function layer and an encapsulation layer sequentially stacked on the substrate. The driving circuit layer is provided with a driving circuit, the light emitting function layer is provided with a light emitting device, the driving circuit is used to drive the light emitting device to emit light, and the encapsulation layer is used to protect the light emitting device to prevent water and oxygen from invading and causing the light emitting device to fail. The flexible organic light emitting diode display panel 1 has a flexible characteristic, so that the display panel 1 can be bent or folded.

[0040] The display panel 1 includes a first plane portion 11, a second plane portion 12, and a bending portion 13 connected between the first plane portion 11 and the second plane portion 12. The second plane portion 12 is bent to the side of the first plane portion 11 away from the first protective layer 20 through the bending portion 13. At least part of the bending portion 13 is located in the first frame area BA1, and the first plane portion 11 is at least located in the display area AA. Binding circuits are provided on the second plane portion 12 and the bending portion 13. By bending the second plane portion 12 to the back side of the display panel 1, an external circuit can be bound to the binding circuit on the second plane portion 12 on the back side of the display panel 1, thereby reducing the frame area occupied by the binding of the external circuit.

[0041] The first protective layer 20 is disposed on the light-emitting side of the display panel 1. The first protective layer 20 is located in the display area AA and extends from the display area AA to the first border area BA1. The cover layer 30 is disposed between the first protective layer 20 and the display panel 1 and is attached to the first protective layer 20. The cover layer 30 is disposed corresponding to the display area AA and extends from the display area AA to the first border area BA1.

[0042] The elastic modulus of the cover plate layer 30 is greater than that of the first protective layer 20, the orthographic projection of the cover plate layer 30 on the first protective layer 20 covers the orthographic projection of the bending portion 13 on the first protective layer 20, and the film layer structure of the cover plate layer 30 close to the first plane portion 11 is different from the film layer structure of the cover plate layer 30 close to the bending portion 13. In this way, by making the cover plate layer and the first protective layer cover the bending portion and performing a differentiated design on the cover plate layer, the decorative frame above the bending portion can be eliminated, and while achieving a narrow frame, the folding performance of the cover plate assembly in the display area and the supporting performance in the first frame area are taken into account, and adhesion between the cover plate assembly and the bending portion is avoided.

[0043] Among them, the orthographic projection of the cover layer 30 on the first protective layer 20 covers the orthographic projection of the bending portion 13 on the first protective layer 20, that is, the orthographic projection of the bending portion 13 on the first protective layer 20 is located within the orthographic projection of the cover layer 30 on the first protective layer 20, so that the setting range of the cover layer 30 is larger than the setting range of the bending portion 13, so that the cover layer 30 can protect the bending portion 13.

[0044] In other words, the orthographic projection of the cover layer 30 on the first reference plane is located within the orthographic projection of the first protective layer 20 on the first reference plane, and the orthographic projection of the bent portion 13 on the first reference plane is located within the orthographic projection of the cover layer on the first reference plane, so that the outer contour of the bent portion 13 is located within the outer contours of the first protective layer 20 and the cover layer 30. In this way, the first protective layer 20 and the cover layer 30 can protect the bent portion 13 and prevent the bent portion 13 from contacting with the entire machine structure and being squeezed by each other, so that the cover assembly 2 can be replaced Figure 1 The decorative frame 3' in the exemplary display module is used to realize a narrow frame. The first reference plane is parallel to the horizontal plane where the first protective layer 20 is located.

[0045] Specifically, the boundary 201 of the first protective layer 20 in the first direction exceeds the boundary 301 of the cover layer 30 in the first direction, or is flush with the boundary 301 of the cover layer 30 in the first direction. The first direction is the relative position setting direction of the display area AA and the first frame area BA1. In other words, the first direction is the direction in which the display area AA points to the first frame area BA1. The display area AA and the first frame area BA1 are arranged in the first direction. The first direction is also the arrangement direction of the display area AA and the first frame area BA1. When the boundary 201 of the first protective layer 20 in the first direction exceeds the boundary 301 of the cover layer 30 in the first direction, that is, the cover layer 30 is partially retracted compared to the first protective layer 20 to protect the cover layer 30 and prevent the cover layer 30 from colliding with the components of the entire machine.

[0046] The cover layer 30 is bonded to the first protective layer 20 through the first adhesive layer 21, and the material of the first adhesive layer 21 includes transparent optical glue, etc. The boundary 301 of the cover layer 30 in the first direction exceeds the boundary 130 of the bending portion 13 in the first direction, so as to cooperate with the first protective layer 20 to protect the bending portion 13. Moreover, the elastic modulus of the cover layer 30 is greater than the elastic modulus of the first protective layer 20. In this way, by selecting the cover layer 30 with a suitable modulus, the cover layer 30 can structurally reinforce the first protective layer 20, increase the modulus of the first protective layer 20, and then increase the overall modulus of the cover assembly 2, thereby improving the reliability of the cover assembly 2 replacing the decorative frame 3', so as to achieve a narrow frame while taking into account the folding performance of the cover assembly 2 in the display area AA and the supporting performance in the first frame area BA1.

[0047] The display module 100 further includes a second protective layer 40 covering the bending portion 13, wherein the orthographic projection of the second protective layer 40 on the first protective layer 20 is located within the orthographic projection of the cover layer 30 on the first protective layer 20, that is, the orthographic projection of the second protective layer 40 on the first reference plane is located within the orthographic projection of the cover layer 30 on the first reference plane, that is, the boundary of the second protective layer 40 in the first direction is within the boundary 301 of the cover layer 30 in the first direction, in other words, the boundary 301 of the cover layer 30 in the first direction exceeds the boundary of the second protective layer 40 in the first direction or coincides with the boundary of the second protective layer 40 in the first direction. The second protective layer 40 can protect the binding circuit on the bending portion 13. The material of the second protective layer 40 includes UV glue and the like.

[0048] The cover plate assembly 2 further includes a third protective layer 50, which is disposed between the cover plate layer 30 and the display panel 1 and is disposed corresponding to the first plane portion 11. The third protective layer 50 is spaced apart from the second protective layer 40 to prevent adhesion between the second protective layer 40 and the third protective layer 50. The material of the third protective layer 50 includes one of transparent polyimide, ultra-thin glass, polyethylene terephthalate, and the like.

[0049] The third protective layer 50 is bonded to the cover layer 30 through the second adhesive layer 22, and the material of the second adhesive layer 22 includes transparent optical glue, etc. The film layer structure of the cover layer 30 near the first plane portion 11 is different from the film layer structure of the cover layer 30 near the bending portion 13. Specifically, the cover layer 30 includes a transparent polyimide sublayer 33 and an isolation sublayer 34 located on the side of the transparent polyimide sublayer 33 near the bending portion 13, the isolation sublayer 34 is arranged opposite to the second protective layer 40, and the isolation sublayer 34 is beyond the boundary of the second protective layer 40 near the display area AA. The material of the transparent polyimide sublayer 33 is transparent polyimide. Transparent polyimide is a material that is compatible with optics and strength in polymer film materials, and has high light transmittance and high strength, so as to achieve a narrow frame while taking into account the folding performance of the cover assembly 2 in the display area AA and the supporting performance in the first frame area BA1.

[0050] The isolation sublayer 34 is located between the cover plate layer 30 and the second protective layer 40, and is arranged opposite to the second protective layer 40 to prevent the cover plate assembly 2 from adhering to the second protective layer 40 on the bending portion 13. The material of the isolation sublayer 34 includes black ink, etc. The boundary of the isolation sublayer 34 in the first direction is flush with the boundary 301 of the transparent polyimide sublayer 33 in the first direction. The boundary of the isolation sublayer 34 on the side close to the third protective layer 50 exceeds the boundary of the second protective layer 40 on the side close to the third protective layer 50, that is, in the first direction, the distance between the isolation sublayer 34 and the third protective layer 50 is less than the distance between the second protective layer 40 and the third protective layer 50, so that the isolation sublayer 34 can completely isolate the transparent polyimide sublayer 33 from the second protective layer 40. The length of the isolation sublayer 34 exceeding the second protective layer 40 is greater than 0.1 mm.

[0051] A color filter layer is provided on one side of the display panel 1 close to the third protective layer 50, and the third protective layer 50 is attached between the color filter layer and the cover layer 30. The color filter layer may include a patterned black matrix (BlackMatrix, BM) and red color resistance, blue color resistance and green color resistance arranged in the patterned black matrix opening. By replacing the polarizer with the color filter layer, the thickness of the display module 100 can be reduced, and the light output rate of the display panel 1 can be increased, thereby reducing energy consumption. Of course, in some other embodiments, the display module 100 may also include a polarizer, and in this case, the third protective layer 50 is no longer required, and the polarizer is spaced apart from the second protective layer 40.

[0052] Optionally, in order to support the display panel 1 and fix the second planar portion 12 bent to the back side of the display panel 1, the display module 100 further includes a back plate 60 and an auxiliary support layer 70. The back plate 60 is disposed on the back side of the display panel 1 and is bonded to the display panel 1. The back plate 60 is disconnected at a position corresponding to the bending portion 13, so that the back plate 60 is arranged in two sections. That is, the back plate 60 includes a first sub-back plate 61 and a second sub-back plate 62, the first sub-back plate 61 is arranged corresponding to the first planar portion 11, and the second sub-back plate 62 is arranged corresponding to the second planar portion 12. The material of the back plate 60 includes polyethylene terephthalate (PET) and the like.

[0053] The auxiliary support layer 70 is disposed on a side of the first sub-back plate 61 away from the first flat portion 11. The material of the auxiliary support layer 70 includes a carbon fiber composite plate, stainless steel (such as SUS), etc. The auxiliary support layer 70 can enable the display panel 1 to meet the requirements of dynamic bending and can ensure the bending shape of the display panel 1 during dynamic bending. The auxiliary support layer 70 is attached to the first sub-back plate 61 through the third adhesive layer 23.

[0054] Optionally, the display module 100 further includes a foldable area within the display area AA, and the auxiliary support layer 70 is provided with a stress release area 701 at a position corresponding to the foldable area. The auxiliary support layer 70 is provided with a hollow structure in the stress release area 701 to release the stress generated during the folding process. In order to prevent dust, debris particles, etc. from entering the display module 100 through the hollow structure on the auxiliary support layer 70, the display module 100 further includes a fourth protective layer 71, which is provided on a side of the auxiliary support layer 70 away from the first sub-back plate 61 and is provided corresponding to the stress release area 701. The fourth protective layer 71 can also structurally reinforce the auxiliary support layer 70 in the stress release area 701. The fourth protective layer 71 can be a single-sided tape or the like.

[0055] A fixing portion 72 is provided between the auxiliary supporting layer 70 and the second sub-back plate 62, and the second sub-back plate 62 is fixed to the auxiliary supporting layer 70 through the fixing portion 72. The fixing portion 72 is fixed to the auxiliary supporting layer 70 through the fourth adhesive layer 24. The material of the fourth adhesive layer 24 includes a pressure-sensitive adhesive, etc., and the material of the third adhesive layer 23 is the same as that of the fourth adhesive layer 24.

[0056] Continue to refer to Figure 2 , the cover plate assembly 2 also includes a light shielding layer 80, which is arranged on the side of the first protective layer 20 close to the cover plate layer 30, and is located in the first border area BA1 and the second border area BA2. The boundary of the light shielding layer 80 is flush with the boundary 201 of the first protective layer 20. The material of the light shielding layer 80 includes black ink, etc., and the light shielding layer 80 is used to shield the first border area BA1 to prevent the structure in the first border area BA1 from being exposed. Optionally, the material of the isolation sublayer 34 is the same as that of the light shielding layer 80, and the orthographic projection of the isolation sublayer 34 on the first protective layer 20 is located within the orthographic projection of the light shielding layer 80 on the first protective layer 20 to prevent the isolation sublayer 34 from leaking out. In one embodiment, when the material of the isolation sublayer 34 is the same as that of the light-shielding layer 80, the isolation sublayer 34 can be used to replace the light-shielding layer 80 above the bending portion 13 to eliminate the light-shielding layer 80 above the bending portion 13, thereby reducing material costs.

[0057] Optionally, the cover plate assembly 2 further includes a hard coating layer, which is disposed on a side of the first protective layer 20 away from the cover plate layer 30, and the hard coating layer is located in the display area AA and extends from the display area AA to the first frame area BA1. Of course, the hard coating layer also extends from the display area AA to the second frame area BA2. The hard coating layer is used to protect the surface of the first protective layer 20 and enhance the modulus of the first protective layer 20.

[0058] In one embodiment, see Figures 1 to 4 , Figure 3 A second cross-sectional structural diagram of the display module 100 provided in an embodiment of the present application is shown in FIG. Figure 4 for Figure 3 Detailed structural diagram of the middle cover layer 30. Figure 3 and Figure 4 ,and Figure 2 The difference of the exemplary embodiment is that the cover layer 30 includes a first sublayer 31 and a second sublayer 32, the first sublayer 31 is attached to the first protective layer 20, and the second sublayer 32 is located on the side of the first sublayer 31 away from the first protective layer 20. The first sublayer 31 is provided with a groove 310 at a position corresponding to the foldable area, and the second sublayer 32 is filled in the groove 310. The elastic modulus of the first sublayer 31 is greater than the elastic modulus of the second sublayer 32. In this way, by providing the groove 310 on the first sublayer 31, the bending stress of the folding area can be reduced, and the reliability of folding can be improved.

[0059] The first sublayer 31 includes an upper surface 311 and a lower surface 312 relative to each other, and a plurality of side surfaces 313 connected between the upper surface 311 and the lower surface 312. The lower surface 312 is located on the side of the upper surface 311 away from the first protective layer 20, and the second sublayer 32 covers the lower surface 312 and the plurality of side surfaces 313. The material of the first sublayer 31 includes ultra-thin glass, and the material of the second sublayer 32 includes a polymer such as polyurethane or acrylic. The film thickness of the first sublayer 31 is greater than 50 microns, such as 50 microns, 60 microns, 70 microns, etc. In this way, by setting the first sublayer 31 with a larger film thickness, the elastic modulus of the cover layer 30 can be increased, thereby improving the overall support performance of the cover assembly 2.

[0060] In order to prevent the second sub-layer 32 from adhering to the second protective layer 40, the cover layer 30 further includes an isolation sub-layer 34 located on the side of the second sub-layer 32 close to the bending portion 13. The isolation sub-layer 34 is arranged opposite to the second protective layer 40, and the boundary of the isolation sub-layer 34 close to the display area AA exceeds the boundary of the second protective layer 40 close to the display area AA. The isolation sub-layer 34 is arranged on the side of the second sub-layer 32 away from the first sub-layer 31, and is arranged corresponding to the second protective layer 40. The isolation sub-layer 34 is located between the second sub-layer 32 and the second protective layer 40.

[0061] In this embodiment, a cover layer 30 including a first sublayer 31, a second sublayer 32 and an isolation sublayer 34 is provided, and a groove 310 is provided in the first sublayer 31 at a position corresponding to the foldable area, the second sublayer 32 is filled in the groove 310, and the isolation sublayer 34 and the second protective layer 40 are arranged opposite to each other. In this way, the film layer structure of the cover layer 30 close to the first plane portion 11 is different from the film layer structure of the cover layer 30 close to the bending portion 13, that is, the cover layer 30 is designed differently. The cover layer 30 is formed by using a first sublayer 31 and a second sublayer 32, and the first sublayer 31 is provided with a groove 310 at a position corresponding to the foldable area, so that the elastic modulus of the cover layer 30 can be improved, so that the elastic modulus of the cover layer 30 is greater than the elastic modulus of the first protective layer 20, thereby increasing the overall elastic modulus of the cover assembly 2, thereby improving the reliability of the cover assembly 2 replacing the decorative frame 3', and the provision of the groove 310 on the first sublayer 31 can reduce the bending stress in the folding area and improve the reliability of folding, and the provision of the isolation sublayer 34 can prevent the second sublayer 32 from adhering to the second protective layer 40, so that the folding performance of the cover assembly 2 in the display area AA and the supporting performance in the first frame area BA1 can be taken into account while achieving a narrow frame, and the adhesion of the cover assembly 2 to the second protective layer 40 on the bending portion 13 can be avoided. For other descriptions, please refer to the above embodiment, which will not be repeated here.

[0062] In one embodiment, see Figures 1 to 5 , Figure 5 This is a schematic diagram of a third cross-sectional structure of the display module 100 provided in an embodiment of the present application. Figure 5 ,and Figure 3The difference of the exemplary embodiment is that, in the first border area BA1, the boundary of the first sub-layer 31 in the first direction exceeds the boundary of the second sub-layer 32 in the first direction, and the boundary of the second protective layer 40 close to the first plane portion 11 is located between the boundary of the first sub-layer 31 and the boundary of the second sub-layer 32. That is, the second sub-layer 32 is retracted toward the display area AA relative to the first sub-layer 31 to avoid adhesion between the second sub-layer 32 and the second protective layer 40, and in this case, it is not necessary to set the isolation sub-layer 34 on the cover layer 30. Please refer to the above embodiment for other descriptions, which will not be repeated here.

[0063] Based on the same inventive concept, an embodiment of the present application further provides a display device, the display device comprising the display module 100 described in one of the above embodiments. The display device is a foldable display device, such as a foldable mobile phone, a foldable notebook, etc.

[0064] According to the above embodiments, it can be seen that:

[0065] In a display module and a display device provided by the present application, the display module includes a cover plate assembly arranged on the light-emitting side of the display panel, the cover plate assembly includes a first protective layer and a cover plate layer located on the side of the first protective layer close to the display panel, the orthographic projection of the cover plate layer on the first protective layer covers the orthographic projection of the bent portion of the display panel on the first protective layer, and the film layer structure of the first flat portion of the cover plate layer close to the display panel is different from the film layer structure of the bent portion of the cover plate layer close to the display panel. In this way, by making the cover plate layer and the first protective layer cover the bent portion and performing a differentiated design on the cover plate layer, the decorative frame located above the bent portion can be eliminated, so as to achieve a narrow frame while taking into account the folding performance of the cover plate assembly in the display area and the supporting performance in the first frame area, and avoiding adhesion between the cover plate assembly and the bent portion.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: The display module includes a display area and a first frame area outside the display area; the display module also includes: A display panel having a light emitting side and a back side opposite to each other, the display panel comprising a first plane portion, a second plane portion, and a bending portion connected between the first plane portion and the second plane portion, the second plane portion being bent to the back side of the first plane portion through the bending portion, and at least a portion of the bending portion being located within the first frame area; a cover plate assembly, arranged on the light-emitting side of the display panel, the cover plate assembly comprising a first protective layer and a cover plate layer located on a side of the first protective layer close to the display panel, the cover plate layer being bonded to the first protective layer, the cover plate layer being arranged corresponding to the display area, and extending from the display area to the first frame area; Among them, the elastic modulus of the cover layer is greater than the elastic modulus of the first protective layer, the orthographic projection of the cover layer on the first protective layer covers the orthographic projection of the bending portion on the first protective layer, and the film layer structure of the cover layer close to the first plane portion is different from the film layer structure of the cover layer close to the bending portion.

2. The display module according to claim 1, characterized in that: The boundary of the cover layer in the first direction exceeds the boundary of the bent portion in the first direction, and the first direction is a relative position setting direction of the display area and the first frame area; The display module further includes a second protective layer covering the bent portion, and an orthographic projection of the second protective layer on the first protective layer is located within an orthographic projection of the cover layer on the first protective layer.

3. The display module according to claim 2, characterized in that: The cover layer includes a transparent polyimide sublayer and an isolation sublayer located on a side of the transparent polyimide sublayer close to the bending portion, and the isolation sublayer is arranged opposite to the second protective layer.

4. The display module according to claim 2, characterized in that: The cover layer includes a first sublayer and a second sublayer, the first sublayer is attached to the first protective layer, and the second sublayer is located on a side of the first sublayer away from the first protective layer; The display module further includes a foldable area located within the display area, the first sub-layer is provided with a groove at a position corresponding to the foldable area, and the second sub-layer is filled in the groove.

5. The display module according to claim 4, characterized in that: The first sublayer includes an upper surface, a lower surface and a plurality of side surfaces connected between the upper surface and the lower surface, the lower surface is located on a side of the upper surface away from the first protective layer, and the second sublayer covers the lower surface and the plurality of side surfaces; The cover plate layer further includes an isolation sublayer located on a side of the second sublayer close to the bending portion, and the isolation sublayer is arranged opposite to the second protective layer.

6. The display module according to claim 4, characterized in that: In the first border area, the boundary of the first sublayer in the first direction exceeds the boundary of the second sublayer in the first direction, and the boundary of the second protective layer close to the first plane portion is located between the boundary of the first sublayer and the boundary of the second sublayer.

7. The display module according to claim 4, characterized in that: The material of the first sub-layer includes ultra-thin glass, and the material of the second sub-layer includes high molecular polymer.

8. The display module according to claim 3 or 5, characterized in that: The boundary of the isolation sublayer close to the display area exceeds the boundary of the second protection layer close to the display area.

9. The display module according to claim 8, characterized in that: The cover plate assembly also includes: A light shielding layer, disposed on a side of the first protective layer close to the cover layer and located within the first frame area; A hard coating layer is disposed on a side of the first protective layer away from the cover layer, the hard coating layer is located in the display area, and extends from the display area to the first frame area; The material of the light-shielding layer includes black ink, the material of the isolation sublayer is the same as that of the light-shielding layer, and the orthographic projection of the isolation sublayer on the first protective layer is within the orthographic projection of the light-shielding layer on the first protective layer.

10. The display module according to any one of claims 2 to 7, characterized in that: The cover plate assembly further includes a third protective layer, wherein the third protective layer is disposed between the cover plate layer and the display panel, and the third protective layer is spaced apart from the second protective layer.

11. The display module according to claim 10, characterized in that: The material of the first protective layer includes one of transparent polyimide and polyethylene terephthalate, the material of the second protective layer includes UV glue, and the material of the third protective layer includes one of transparent polyimide, ultra-thin glass, and polyethylene terephthalate.

12. A display device, characterized in that: Comprising the display module as claimed in any one of claims 1 to 11.

Images