Display module and display device

Abstract

The invention discloses a display module and a display device. The display module comprises a display panel, a cover plate layer and a protection part, the cover plate layer is arranged on one side of a light emitting surface of the display panel and comprises a plane part and a curved surface part located on the periphery of the plane part, the protection part comprises a retaining wall and a first filling part, and the retaining wall is arranged on one side, away from the cover plate layer, of the display panel; the first filling part is located in an enclosed area of the display panel, the retaining wall and the curved surface part, and is connected with at least part of the curved surface part; the retaining wall is arranged on the side, away from the cover plate layer, of the display panel, and the first filling part is filled between the retaining wall and the curved surface part of the cover plate layer, so that the edge area of the display module is supported, the impact resistance of the display module in the edge area is improved, meanwhile, the process difficulty of the protection part is reduced through the structure of the single-side retaining wall and the curved surface part, and the production efficiency is improved. And the processing efficiency is improved.

Description

Technical Field

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

[0002] With the development trend of electronic devices pursuing extremely full-screen displays, display screens (such as mobile phones) on the market are emerging in an endless stream. In order to pursue the diversification of the appearance of display devices, the narrow bezel design of display screens is particularly important.

[0003] In current display devices, a flexible display panel relies on its bendable characteristics. By bending flexible structures such as the substrate and the film layer above it to be fixed on the back of the flexible display panel, the requirement of a narrow bezel can be achieved. However, in the current narrow-bezel flexible display panel, the edge area has poor support force, resulting in poor impact resistance of the flexible display panel. Summary of the Invention

[0004] The present application provides a display module and a display device to improve the technical problem of insufficient edge support force in existing display devices.

[0005] To solve the above solution, the technical solution provided by the present application is as follows:

[0006] In a first aspect, the present application provides a display module, which includes:

[0007] A display panel, including a light-emitting surface;

[0008] A cover plate layer, disposed on one side of the light-emitting surface of the display panel, the cover plate layer including a flat portion and a curved portion located outside the flat portion; and

[0009] A protection member, including a retaining wall and a first filling portion, the retaining wall is disposed on a side of the display panel away from the cover plate layer, and the first filling portion is located in an enclosed area of the display panel, the retaining wall and the curved portion, and is connected to at least a part of the curved portion.

[0010] Optionally, the display module includes:

[0011] A composite support layer;

[0012] A display panel, including a first body, a second body, and a bent portion connecting the first body and the second body, the first body is disposed on a first side of the composite support layer, and the second body is disposed on a second side of the composite support layer opposite to the first side;

[0013] Wherein, the retaining wall includes a first sub-retaining wall disposed on a side of the bent portion away from the cover plate layer, the first filling portion includes a first sub-portion, the first sub-portion is located within an enclosed area formed by the bent portion, the first sub-retaining wall, and the curved surface portion, and is connected to at least a part of the curved surface portion; or,

[0014] The retaining wall includes a first sub-retaining wall disposed on a side of the third body away from the cover plate layer, the first filling portion includes a first sub-portion, the first sub-portion is located within an enclosed area formed by the bent portion, the third body, the first sub-retaining wall, and the curved surface portion, and is connected to at least a part of the curved surface portion.

[0015] Optionally, the retaining wall includes a second sub-retaining wall disposed on a side of the composite support layer away from the display panel, the first filling portion includes a second sub-portion, and the second sub-portion is connected to at least the side surface of the first body, the side surface of the composite support layer, the second sub-retaining wall, and at least a part of the curved surface portion.

[0016] Optionally, the distance between the surface of the second sub-retaining wall close to the curved surface portion and the side surface of the composite support layer is greater than or equal to 0.

[0017] Optionally, the protective member further includes a second filling portion connected to the first filling portion, and at least a part of the second filling portion is located within an enclosed space between the bent portion and the composite support layer.

[0018] Optionally, the gelation rate of the first filling portion is different from the gelation rate of the second filling portion.

[0019] Optionally, the first sub-retaining wall and the second sub-retaining wall are connected, the retaining wall is a closed annular structure, the first sub-portion and the second sub-portion are connected, and the first filling portion is a closed annular structure.

[0020] Optionally, the curved surface portion includes an inner arc surface close to the display panel, and the included angle between the inner arc surface and the plane portion is greater than or equal to 45 degrees and less than or equal to 90 degrees.

[0021] Optionally, in the thickness direction of the display module, the distance between the surface of the curved surface portion away from the plane portion and the plane portion is greater than or equal to the distance between the surface of the retaining wall away from the display panel and the plane portion.

[0022] Optionally, the surface of the first filling portion away from the display panel and the surface of the retaining wall away from the display panel are located in the same plane.

[0023] Optionally, the Young's modulus of the retaining wall is greater than or equal to the Young's modulus of the first filling portion.

[0024] Optionally, the retaining wall includes a plurality of connected retaining wall units arranged in the thickness direction of the display module, and the outer wall of the retaining wall unit is convex.

[0025] Optionally, the width of the retaining wall close to the display panel is greater than the width of the retaining wall far from the display panel.

[0026] Optionally, the width of the retaining wall is 0.08 mm to 1 mm.

[0027] In a second aspect, the present application provides a display device, which includes the above-mentioned display module and a middle frame, and the first filling part is arranged in the area between the middle frame and the display module.

[0028] In the present application, by arranging a retaining wall on the side of the display panel away from the cover plate layer and filling a first filling part between the retaining wall and the curved surface part of the cover plate layer to support the edge area of the display module, the impact resistance of the display module in the edge area is improved. At the same time, the structure of the single-sided retaining wall and the curved surface part reduces the process difficulty of the protection part and improves the manufacturing process efficiency.

[0029] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0032] Figure 1 is a structural diagram of the display module of the present application;

[0033] Figure 2 is a structural diagram of the cover plate layer in the display module of the present application;

[0034] Figure 3 is Figure 1 the first cross-sectional view of cross-section AA;

[0035] Figure 4 is Figure 1 the second cross-sectional view of cross-section AA;

[0036] Figure 5 is Figure 1The first sectional view of the middle section BB;

[0037] Figure 6 is Figure 1 The second sectional view of the middle section BB;

[0038] Figure 7 is Figure 1 The third sectional view of the middle section BB;

[0039] Figure 8 This is the film layer structure diagram of the display panel in the display module of the present application;

[0040] Figure 9 This is the structure diagram of the display module of the present application before bending. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0042] Please refer to Figures 1 to 9 , the present application provides a display module 100, which includes a display panel 10, a cover layer 50 and a protection member 30. The display panel 10 includes a light-emitting surface 10a. The cover layer 50 is disposed on one side of the light-emitting surface 10a of the display panel 10. The cover layer 50 includes a flat portion 510 and a curved portion 520 located outside the flat portion 510.

[0043] In this embodiment, the protection member 30 includes a retaining wall 310 and a first filling portion 320. The retaining wall 310 is disposed on the side of the display panel 10 away from the cover layer 50. The first filling portion 320 is located in the enclosed area of the display panel 10, the retaining wall 310 and the curved portion 520, and is connected to at least part of the curved portion 520.

[0044] In this embodiment, due to the insufficient supporting force in the edge area of the narrow-bezel display device, the impact resistance of the display screen is poor. To improve the impact resistance of the display screen, the edge area of the display screen is usually filled with a glue material to improve the impact resistance performance of the product in the edge area. For a four-curved display device, since the normal vector directions of the side curved surfaces of the four-curved display device are different, the accuracy of the current dispensing device cannot meet the dispensing requirements of the four-curved display device. In this application, a retaining wall 310 is provided on the side of the display panel 10 facing away from the cover layer 50, and a first filling portion 320 is filled between the retaining wall 310 and the curved surface portion 520 of the cover layer 50 to support the edge area of the display module 100, improving the impact resistance performance of the display module 100 in the edge area. At the same time, the setting of the single-sided retaining wall 310 and using the curved surface portion 520 of the cover layer 50 as another retaining wall 310 structure enable the dispensing device of the retaining wall 310 not to consider the problem of different normal vector directions of the side curved surfaces of the four-curved display device, reducing the accuracy requirements of the dispensing device, decreasing the process difficulty of the protection member 30 of this application, and improving the process accuracy of the protection member 30 and the manufacturing efficiency of the display device.

[0045] The technical solution of this application will be described in combination with specific embodiments.

[0046] Please refer to Figures 3 to 6 , the display module 100 further includes a composite support layer 20 provided on the side of the display panel 10 away from the cover layer 50, and the display panel 10 can be a flexible display panel 10, which has a first body 110, a second body 120, and a bending portion 130 connecting the first body 110 and the second body 120. The first body 110 is disposed on the first side of the composite support layer 20, and the second body 120 is disposed on the second side of the composite support layer 20 opposite to the first side.

[0047] In this embodiment, the first body 110 has a display area and a non-display area adjacent to the display area. For example, the non-display area surrounds the display area, so that the display area is surrounded by the non-display area. The display area is the area in the display panel 10 for exerting the display function, and a plurality of display units for realizing its display function are provided therein. The non-display area can be the border area of the display panel 10, and functional components for assisting the display units in the display area to display can be provided therein.

[0048] In this embodiment, a bonding terminal 121 is provided in the second body 120. The bonding terminal 121 can be connected to an external circuit, and the bonding terminal 121 transmits the signal input by the external circuit to the data trace, thereby driving the display panel 10 to display a picture. For example, the bonding terminal 121 can be bonded and connected to a driving chip IC or the like for providing power and driving signals to the display panel 10.

[0049] In this embodiment, a plurality of fan-out traces are provided in the bending portion 130 to achieve data transmission between the second body 120 and the first body 110.

[0050] Please refer to Figure 8 , Figure 8 which is a schematic diagram of the display panel 10 of the present application. The display panel 10 may include a substrate 140, a driving circuit layer 150 disposed on the substrate 140, a pixel definition layer 160 and a light-emitting device layer 170 disposed on the driving circuit layer 150, and a packaging layer 180 disposed on the pixel definition layer 160.

[0051] In this embodiment, the substrate 140 supports the various layers disposed on the substrate 140. When the display panel is a bottom-emitting light-emitting display device or a double-sided emitting light-emitting display device, a transparent substrate is used. When the display panel is a top-emitting light-emitting display device, a semi-transparent or opaque substrate as well as a transparent substrate can be used.

[0052] In this embodiment, the substrate 140 is made of an insulating material such as glass, quartz, or polymer resin. The substrate 140 can be a rigid substrate or a flexible substrate that can be bent, folded, curled, etc. Examples of flexible materials for the flexible substrate include polyimide (PI), but are not limited to polyimide (PI).

[0053] Please refer to Figure 4 , the driving circuit layer 150 may include a plurality of thin film transistors. The thin film transistors can be etch-blocking type, back-channel etching type, or classified into bottom-gate thin film transistors, top-gate thin film transistors, etc. according to the positions of the gate and the active layer, without specific limitation. For example, Figure 8 the thin film transistor shown in Figure 4 is a top-gate thin film transistor. The thin film transistor may include a light-shielding unit 151 disposed on the substrate, a buffer layer 152 disposed on the light-shielding unit 151, an active layer 153 disposed on the buffer layer 152, a gate insulating layer 154 disposed on the active layer 153, a gate layer 155 disposed on the gate insulating layer 154, an inter-insulating layer 156 disposed on the gate layer 155, a source-drain layer 157 disposed on the inter-insulating layer 156, and a planarization layer 158 disposed on the source-drain layer 157;

[0054] Please refer to Figure 8, the light-emitting device layer 170 may further include an anode layer 171 disposed on the flat layer 158, a light-emitting layer 172 disposed on the anode layer 171, and a cathode layer 173 disposed on the light-emitting layer 172. The anode layer 171 includes a plurality of anodes, the pixel definition layer 160 includes a plurality of pixel openings corresponding one-to-one to the plurality of anodes, and each pixel opening correspondingly exposes the upper surface of an anode. The light-emitting layer may include a plurality of light-emitting pixels corresponding one-to-one to the plurality of anodes.

[0055] Please refer to Figure 8 , the encapsulation layer 180 covers the pixel definition layer 160 and continuously covers the plurality of pixel openings and the plurality of light-emitting pixels thereon; wherein, the encapsulation layer 180 may at least include a first inorganic encapsulation layer 181, a first organic encapsulation layer 182, and a second inorganic encapsulation layer 183 which are stacked on the pixel definition layer 160.

[0056] Please refer to Figures 3 to 6 , the display module 100 further includes a polarizer PL, a cover plate layer 50, and an optical adhesive layer 60 disposed between the polarizer PL and the cover plate layer 50. The cover plate layer 50 is adhered to the polarizer PL layer through the optical adhesive layer 60.

[0057] In this embodiment, a ring of ink layer 70 may be provided on the side of the cover plate layer 50 close to the optical adhesive layer 60. The ink layer 70 can be used to block the peripheral area of the display module 100, so the ink layer 70 can define the edge area of the display module 100.

[0058] Please refer to Figures 3 to 6 , the display module 100 further includes a composite support layer 20 disposed between the first body 110 and the second body 120. The composite support layer 20 includes a first backplane 21, a second backplane 22, and a functional support layer 23 disposed between the first backplane 21 and the second backplane 22. The first backplane 21 contacts the first body 110, and the second backplane 22 contacts the second body 120.

[0059] In this embodiment, the materials of the first backplane 21 and the second backplane 22 may include polyethylene terephthalate, etc.

[0060] In this embodiment, the functional support layer 23 may include a heat dissipation buffer layer 231 (Super Clean Foam, SCF) and a filling adhesive layer 232 (Stiffener, STF). The filling adhesive layer 232 is disposed between the second backplane 22 and the heat dissipation buffer layer 231; the heat dissipation buffer layer 231 may include a grid adhesive layer, a foam layer, and a heat dissipation layer stacked in sequence, or for example Figures 5 to 6, the heat dissipation buffer layer 231 may include a grid adhesive layer 231a, a foam layer 231b, a polyimide layer 231c, and a heat dissipation material layer 231d that are sequentially stacked. The heat dissipation material layer 231d may be a metal material, such as copper.

[0061] It should be noted that for a foldable display device, the functional support layer 23 may include a stacked structure of a buffer layer, a rigid layer, and a heat dissipation layer. The material of the buffer layer may be foam or a polyimide layer, the material of the rigid layer may be stainless steel, a titanium metal layer, or carbon fiber, etc., and the material of the heat dissipation layer may be graphite or a copper layer, etc.

[0062] In this embodiment, please refer to Figure 3 and Figure 4 , for the area where the lower border of the display module is located, the boundary of the heat dissipation buffer layer 231 on the side close to the bending part 130 is retracted relative to the boundary of the first backplane 21 on the side close to the bending part 130, and the boundary of the filling adhesive layer 232 on the side close to the bending part 130 is retracted relative to the boundary of the second backplane 22 on the side close to the bending part 130; please refer to Figure 5 and Figure 6 , for the area where the left border of the display module 100 is located, since there is no bending part 130 in this area, the filling adhesive layer 232 and the second backplane 22 are not provided in this area.

[0063] Please refer to Figures 3 to 6 , the display module 100 further includes a protective adhesive layer 80 disposed on the display panel 10. The protective adhesive layer 80 covers the bending part 130, as well as part of the first body 110 and part of the second body 120.

[0064] In this embodiment, the material of the protective adhesive layer 80 may be an ultraviolet curable adhesive.

[0065] It should be noted that the technical solution of the present application is applicable to both non-foldable display devices and foldable display devices; for non-foldable display devices, the cover layer of the present application may be a hard cover plate, and for foldable display devices, the cover layer may be an ultra-thin glass and a protective layer with a self-adhesive optical film.

[0066] Please refer to the appendix Figure 2 , the cover layer 50 includes a flat part 510 and a curved part 520 located on the periphery of the flat part 510. The curved part 520 includes a plurality of side sub-parts 521 located on the periphery of the flat part 510 and corner sub-parts 522 located between adjacent two side sub-parts 521. The first filling part of the present application is mainly connected to the side sub-parts 521 and the corner sub-parts 522.

[0067] Please refer to Figures 3 to 6, in the thickness direction of the display module 100, the distance between the surface of the curved surface portion 520 away from the flat surface portion 510 and the flat surface portion 510 is greater than or equal to the distance between the surface of the retaining wall 310 away from the display panel 10 and the flat surface portion 510.

[0068] In this embodiment, since the curved surface portion 520 is reused as the retaining wall 310 structure of the first filling portion 320, the curved surface portion 520 needs to extend a sufficient length in a direction away from the flat surface portion 510 to ensure the overflow of the first filling portion 320. For example, please refer to Figure 3 and Figure 5 , the surface of the curved surface portion 520 of the present application away from the flat surface portion 510 can exceed the surface of the retaining wall 310 away from the display panel 10; or please refer to Figure 4 and Figure 6 , the surface of the curved surface portion 520 of the present application away from the flat surface portion 510 can be in the same plane as the surface of the retaining wall 310 away from the display panel 10.

[0069] Please refer to Figures 3 to 6 , the curved surface portion 520 includes an inner arc surface 520a close to the display panel 10, and the included angle between the inner arc surface 520a and the flat surface portion 510 is greater than or equal to 45 degrees and less than or equal to 90 degrees.

[0070] In this embodiment, since the curved surface portion 520 is reused as the retaining wall 310 structure of the first filling portion 320, the curved surface portion 520 needs to extend a sufficient length in a direction away from the flat surface portion 510 to ensure the overflow of the first filling portion 320. However, in order to achieve a narrow border design of the display device, the side width of the curved surface portion 520 of the cover plate layer 50 cannot be too large; in the present application, by making the included angle between the inner arc surface 520a and the flat surface portion 510 greater than or equal to 45 degrees and less than or equal to 90 degrees, while making the curved surface portion 520 have a sufficient extension length, the width of the curved surface portion 520 is reduced, and a narrow border design of the product is achieved.

[0071] In this embodiment, the display module 100 may include a lower border, a left border, a right border, and an upper border. The bending portion 130 may be located within the lower border. In order to further improve the impact resistance of the display module 100 at the four borders, the present application may make the retaining wall 310 and the first filling portion 320 be a closed annular structure.

[0072] In this embodiment, the retaining wall 310 may include a first sub-retaining wall 311 and a second sub-retaining wall 312. The first sub-retaining wall 311 is located within the area of the lower border, and the second sub-retaining wall 312 may be located within the area of at least one of the left border, the right border, and the upper border.

[0073] In this embodiment, the first sub-retaining wall 311 and the second sub-retaining wall 312 are connected, and the retaining wall 310 formed by the first sub-retaining wall 311 and the second sub-retaining wall 312 is a closed annular structure, that is, it is arranged along the periphery of the display panel 10.

[0074] In this embodiment, the first filling portion 320 may include a first sub-portion 321 and a second sub-portion 322. The first sub-portion 321 is located within the area of the lower border, and the second sub-portion 322 may be located within the area of at least one of the left border, the right border, and the upper border.

[0075] In this embodiment, the first sub-portion 321 and the second sub-portion 322 are connected, and the first filling portion 320 formed by the first sub-portion 321 and the second sub-portion 322 is a closed annular structure, that is, it is arranged along the periphery of the display panel 10.

[0076] Please refer to Figure 3 , the first sub-portion 321 may be located within the enclosed area of the bending portion 130, the first sub-retaining wall 311, and the curved surface portion 520, and is connected to at least a part of the curved surface portion 520.

[0077] In Figure 3 's structure, the first sub-retaining wall 311 may be arranged within the area where the bending portion 130 is located. Since a protective adhesive layer 80 is provided on the surface of the bending portion 13 away from the composite support layer 20, the first sub-retaining wall 311 of the present application can be directly arranged on the surface of the protective adhesive layer 80 away from the composite support layer 20. At the same time, the first sub-portion 321 can fill the area between the first sub-retaining wall 311 and the curved surface portion 520, and the first sub-portion 321 can also be connected to the surface of the protective adhesive layer 80 away from the composite support layer 20 and fill the gap between the protective adhesive layer 80 and the curved surface portion 520.

[0078] Please refer to Figure 4 , the first sub-portion 321 is located within the enclosed area of the bending portion 130, the second body 120, the first sub-retaining wall 311, and the curved surface portion 520, and is connected to at least a part of the curved surface portion 520; in Figure 2In the structure, the first sub-retaining wall 311 may be disposed within the area where the second body 120 is located. For example, the first sub-retaining wall 311 may be disposed between the end of the protective adhesive layer 80 and the driving chip IC.

[0079] In this embodiment, since the bending portion 130, a part of the second body 120, and a part of the surface of the first body 110 away from the composite support layer 20 are provided with the protective adhesive layer 80, the first sub-retaining wall 311 of the present application can be directly disposed on the surface of the protective adhesive layer 80 away from the composite support layer 20. At the same time, the first sub-portion 321 can fill the area between the first sub-retaining wall 311 and the curved surface portion 520, and the first sub-portion 321 can also be connected to the surface of the protective adhesive layer 80 away from the composite support layer 20 and fill the gap between the protective adhesive layer 80 and the curved surface portion 520.

[0080] It should be noted that the position of the first sub-retaining wall 311 is not specifically limited in the present application. For example Figure 2 the first retaining wall 310 in [reference] can contact the protective adhesive layer 80 corresponding to the bending portion 130, or Figure 3 the first sub-retaining wall 311 in [reference] can be disposed between the end of the protective adhesive layer 80 and the driving chip IC.

[0081] In the display module 100 of the present application, the display module 100 further includes a driving chip IC disposed on the side of the second body 120 away from the first body 110 and a shielding film 122 covering the driving chip IC, and the driving chip IC is bound and connected to the bonding terminal 121 in the second body 120. The shielding film 122 can overlap with a part of the protective adhesive layer 80, that is, the first sub-retaining wall 311 of the present application can contact the surface of the shielding film 122 away from the cover layer 50.

[0082] In this embodiment, the first sub-retaining wall 311 can also overlap with the driving chip IC.

[0083] Please refer to Figure 5 and Figure 6 , the second sub-portion 322 is connected to at least the side surface of the first body 110, the side surface of the composite support layer 20, the second sub-retaining wall 312, and at least a part of the curved surface portion 520.

[0084] In Figure 5In the structure, the distance between the surface of the second sub-retaining wall 312 close to the curved surface portion 520 and the side surface of the composite support layer 20 can be equal to 0, that is, it is equivalent to the edge of the second sub-retaining wall 312 coinciding with the boundary line of the side surface of the composite support layer 20 far from the display panel 10; that is, the second sub-portion 322 can fill the area between the second sub-retaining wall 312 and the curved surface portion 520, and the second sub-portion 322 can also contact the composite support layer 20, the display panel 10, the polarizer PL and the optical adhesive layer 60 on the side surfaces of the left border, the right border and the upper border, and extend to the inner surface of the adjacent curved surface portion 520 close to the display panel 10 side.

[0085] Please refer to Figure 6 , the distance between the surface of the second sub-retaining wall 312 close to the curved surface portion 520 and the side surface of the composite support layer 20 can be greater than 0, that is, it is equivalent to the second sub-retaining wall 312 being located on the surface of the composite support layer 20 far from the display panel 10, and since the composite support layer 20 is usually only provided with a heat dissipation buffer layer 231 (Super Clean Foam, SCF) in the areas of the left border, the right border and the upper border, the second sub-retaining wall 312 is located on the surface of the heat dissipation buffer layer 231 far from the display panel 10, for example, the second sub-retaining wall 312 can be located on the surface of the heat dissipation layer 231d in the heat dissipation buffer layer 231.

[0086] In this embodiment, since the bending portion 130 is provided in the area of the lower border, in order to further strengthen the impact resistance of the lower border in this application, the width of the first sub-retaining wall 311 can be greater than or equal to the width of the second sub-retaining wall 312, and the width of the first sub-portion 321 is greater than or equal to the width of the second sub-portion 322.

[0087] In this embodiment, the width of the first sub-retaining wall 311 can also be less than the width of the second sub-retaining wall 312, and the width of the first sub-portion 321 is less than the width of the second sub-portion 322.

[0088] In Figures 3 to 6 's structure, the surface of the first filling portion 320 far from the display panel 10 of this application is located on the same plane as the surface of the retaining wall 310 far from the display panel 10, that is, this application can limit the height of the first filling portion 320 according to the height of the retaining wall 310 to avoid the overflow of the first filling portion 320.

[0089] It should be noted that Figure 6 Although it only represents Figure 1 The cross-sectional view BB in the left border, but Figure 6It can also represent the cross-sectional views of the right frame and the upper frame.

[0090] Please refer to Figure 7 , Figure 7 which is Figure 6 the same as or similar to, except that: Figure 7 in the heat dissipation buffer layer 231, it further includes a first protective material layer 231e and a second protective material layer 231f provided on the side of the heat dissipation material layer 231d away from the cover plate layer 50. The materials of the first protective material layer 231e and the second protective material layer 231f are not specifically limited. For example, they can be polymer materials such as polypropylene or poly(propylene fumarate).

[0091] In Figure 7 the structure, the first protective material layer 231e and the second protective material layer 231f near the curved surface portion are removed, and the second sub-retaining wall 312 can be located on the surface of the heat dissipation buffer layer 231 on the side away from the cover plate layer 50, that is, the second sub-retaining wall 312 is not overlapped with the two protective material layers.

[0092] In this embodiment, the first protective material layer 231e and the second protective material layer 231f in the left frame, right frame, and upper frame near the curved surface portion 520 can be removed.

[0093] It should be noted that the first protective material layer 231e and the second protective material layer 231f can be retained according to specific circumstances. For example, Figure 6 in Figure 7 the first protective material layer 231e and the second protective material layer 231f are both removed, and

[0094] In the Figures 3 to 7 structure of the present application, the curvature of the curved surface portion 520 near the end close to the flat surface portion 510 is greater than the curvature of the curved surface portion 520 near the end away from the flat surface portion 510; the curvature of the curved surface portion 520 near the end away from the flat surface portion 510 decreases, which can further reduce the frame width of the curved surface portion 520 to achieve a narrow frame design of the product.

[0095] In this embodiment, the curved surface portion 520 includes an inner arc surface 520a close to the display panel 10, and the curvature of the inner arc surface 520a near the end away from the flat surface portion 510 can be 0; for example, in the appendix of the present application Figures 3 to 7 the cross-section of the inner arc surface 520a near the end away from the flat surface portion 510 can be a straight line.

[0096] In this embodiment, the curved surface portion 520 includes an outer arc surface 520b away from the side of the display panel 10, and the curvature of the outer arc surface 520b may be greater than or equal to the curvature of the position corresponding to the outer arc surface 520b in the inner arc surface 520a; for example, Figures 3 to 7 In, the cross-sections of the inner arc surface 520a and the outer arc surface 520b at one end away from the flat surface portion 510 may both be straight lines, that is, it is equivalent to that the curvatures of the inner arc surface 520a and the outer arc surface 520b at one end away from the flat surface portion 510 are both 0.

[0097] In this embodiment, a part of the outer arc surface 520b at one end away from the flat surface portion 510 may be a curved surface with a curvature close to 0, or a plane parallel to the thickness direction of the display module 100; a part of the inner arc surface 520a at one end away from the flat surface portion 510 may be a plane intersecting or parallel to the thickness direction of the display module 100.

[0098] In this embodiment, the retaining wall 310 may be formed by a dispensing process. For example, the first sub-retaining wall 311 and the second sub-retaining wall 312 are formed simultaneously by a single dispensing process. After the first sub-retaining wall 311 and the second sub-retaining wall 312 are cured, the first sub-part 321 is filled between the first sub-retaining wall 311 and the corresponding curved surface portion 520, and the second sub-part 322 is filled between the second sub-retaining wall 312 and the corresponding curved surface portion 520.

[0099] In this embodiment, within the lower border area of the display module 100, since the first sub-part 321 is provided between the bending portion 130, the first sub-retaining wall 311, and the curved surface portion 520, the first sub-part 321 can exert a force on the bending portion 130 to stabilize its shape, so as to reduce the problem that the size of the lower border is large due to its outward expansion; that is, the bending portion 130 acted on by the first sub-part 321 can be closer to the display area AA of the display panel 10 compared to the bending portion 130 not acted on, thereby making the size of the lower border smaller.

[0100] [[ID=1,4]]In this embodiment, the Young's modulus of the retaining wall 310 is greater than or equal to the Young's modulus of the first filling portion 320. When the cover layer 50 of the display module 100 is impacted, since the structure directly contacting the cover layer 50 is the first filling portion 320, and the first filling portion 320 has a smaller Young's modulus, the first filling portion 320 can absorb the stress it receives to play a buffering role, so as to reduce the stress transmitted to the display area AA. At the same time, the setting of the retaining wall 310 can further resist or buffer the stress. [[ID=,16]]

[0101] Meanwhile, the relatively large Young's modulus of the retaining wall 310 can reduce the risk of deformation of the appearance of the protection member 30, and the protection member 30 can absorb more stress through the buffering effect of the first filling portion 320 inside; in the manufacturing process, the retaining wall 310 with a relatively large Young's modulus can be formed first to fix the appearance shape of the protection member 30, and then the first filling portion 320 inside is manufactured, which can improve the reliability of the appearance shape of the protection member 30.

[0102] Meanwhile, the Young's modulus of the first filling portion 320 can also be greater than or equal to that of the retaining wall 310. That is, the first filling portion 320 in direct contact with the outside has a relatively large Young's modulus and strong anti-deformation ability, and can better block stress to reduce the risk of stress transmission to the display area AA. The retaining wall 310 can further resist or buffer stress.

[0103] In this embodiment, since the retaining wall 310 of the present application can be formed by stacking glue layer by layer from the side close to the display panel 10 to the side far from the display panel 10, and since the glue material has a certain fluidity, the width of the retaining wall 310 on the side close to the display panel 10 is greater than or equal to the width of the retaining wall 310 on the side far from the display panel 10, that is, the retaining wall 310 has a relatively large width on the side close to the display panel 10.

[0104] In this embodiment, since the retaining wall 310 is formed by stacking glue layer by layer, the retaining wall 310 of the present application includes a plurality of connected retaining wall units 310a arranged along the thickness direction of the display module 100, and the outer wall of the retaining wall unit 310a is convex, for example Figure 6 the structure in.

[0105] In this embodiment, the width of the retaining wall 310 is 0.08 mm to 1 mm.

[0106] In this embodiment, the main materials of the retaining wall 310 and the first filling portion 320 can be the same or different. For example, the main materials of the retaining wall 310 and the first filling portion 320 can be polymer materials such as epoxy systems or acrylic systems.

[0107] In this embodiment, the present application can dope different types and / or different amounts of particles in the corresponding main material to make the Young's moduli of the retaining wall 310 and the first filling portion 320 different.

[0108] Please refer to Figure 3 and Figure 4 , the protection member 30 further includes a second filling portion 330 connected to the first filling portion 320, and at least part of the second filling portion 330 is located in the enclosed space WTL between the bending portion 130 and the composite support layer 20.

[0109] In this embodiment, the second filling portion 330 can be formed by a dispensing process.

[0110] In this embodiment, the gelation rate of the second filling portion 330 and the gelation rate of the first filling portion 320 can be the same or different.

[0111] For example, please refer to Figure 9 , before the display panel 10 is bent, the filling glue layer 232 and the second backplane 22 are disposed on the side of the second body 120 away from the light-emitting surface 10a, and the first backplane 21 and the heat dissipation buffer layer 231 can be disposed on the side of the first body 110 away from the light-emitting surface 10a.

[0112] In Figure 9 's structure, by using the dispensing process, a protective material 330a is formed on the surface of the bending portion 130 on the side away from the light-emitting surface 10a of the display panel 10; secondly, after the protective material 330a is first cured, the second body 120 is bent to the side of the first body 110 away from the light-emitting surface 10a, and the protective material 330a is located in the enclosed space WTL between the bending portion 130, the filling glue layer 232 and the heat dissipation buffer layer 231, and the protective material 330a is secondarily cured; finally, by using the dispensing process, a first filling portion 320 connected to the second filling portion 330 is formed on the surface of the bending portion 130 on the side away from the composite support layer 20, so as to form Figure 3 or Figure 4 's structure.

[0113] It should be noted that since the second filling portion 330 and the first filling portion 320 are cured in different curing processes, the gelation rate of the second filling portion 330 and the gelation rate of the first filling portion 320 in this application are different.

[0114] It should be noted that the gelation rate in this application refers to the mass fraction of the gel part formed during the crosslinking process of the polymer, which characterizes the crosslinking degree of the polymer; and the gelation rate is related to the type and content of the crosslinking agent, as well as reaction conditions such as reaction temperature, time and pressure. Therefore, the different gelation rates of the second filling portion 330 and the first filling portion 320 in this application can characterize that the second filling portion 330 and the first filling portion 320 are formed in different process steps.

[0115] In this embodiment, the main material of the second filling portion 330 can be the same as the main material of the first filling portion 320.

[0116] In this embodiment, the second filling portion 330 and the first filling portion 320 can be formed simultaneously in one process.

[0117] In this embodiment, the second filling portion 330 may be a thermosetting material, and the first filling portion 320 may be a thermosetting or photocuring material. Since the second filling portion 330 is located within the enclosed space WTL, and the enclosed space WTL is a non-light-transmitting area, in order to completely cure the second filling portion 330, the second filling portion 330 of the present application needs to use a thermosetting material; at the same time, since the first filling portion 320 is mainly used for buffering the bent portion 130, the curing rate of the first filling portion 320 of the present application is not limited, that is, the first filling portion 320 of the present application may be a thermosetting material or a photocuring material.

[0118] Please refer to Figure 2 , the corner sub-portion 522 of the cover plate layer 50 is a Gaussian surface, and the flexible material corresponding to the corner sub-portion 522 will be stressed in all directions, resulting in wrinkles in this area; the present application can increase the material of the protection member 30 corresponding to the corner sub-portion 522, that is, the width of the first filling portion 320 within the corner sub-portion 522 is greater than the width of the first filling portion 320 in the non-corner sub-portion 522, thereby increasing the Young's modulus of the protection member 30 in the corner sub-portion 522 to fix the Gaussian surface, reduce the degree of freedom of deformation in this area, and improve the reliability of the product.

[0119] When performing a dispensing process on a current 2D or 2.5D display device, it usually needs to first dispense glue into the gap between the bent portion 130 and the cover plate layer 50, that is, the gap between the end of the protective glue layer 70 close to the polarizer PL and the cover plate layer 50. Since the distance between the two circles of retaining walls is small, and the distance between the retaining wall on the side close to the cover plate layer 50 and the position of the gap is small, due to the action of the viscosity and surface tension of the material used for dispensing, the dispensing material cannot flow into this gap. Therefore, it usually uses a five-axis dispensing machine to tilt the display device to a certain angle before dispensing. Secondly, a circle of retaining walls is provided on the surfaces of the cover plate and the display panel 10 on the side facing away from the cover plate layer 50, and finally, glue is filled between the two retaining walls.

[0120] In the present application, the setting of a circle of retaining wall 310 and the reuse of part of the curved surface portion 520 as the peripheral retaining wall reduce the setting of a circle of retaining wall 310. There is a sufficient distance between this gap and the curved surface portion 520, and combined with the curvature of the curved surface portion 520 itself, the first filling portion 320 can directly flow into this gap without using a five-axis dispensing device for dispensing; secondly, the reuse of part of the curved surface portion 520 as the peripheral retaining wall can prevent the material of the first filling portion 320 from overflowing to the outside of the curved surface portion 520; finally, the curved surface portion 520 with a high Young's modulus is reused as the peripheral retaining wall, improving the stability of the protection member 30.

[0121] The present application also provides a display device, which includes a middle frame and the above-mentioned display module. The protection member and the fixing plate can be disposed in the area between the middle frame and the display module to improve the impact resistance of the display device in the edge area. The display device can include electronic devices such as mobile phones, televisions, and laptop computers.

[0122] The present application discloses a display module and a display device. The display module includes a display panel, a cover plate layer, and a protection member. The cover plate layer is disposed on one side of the light-emitting surface of the display panel. The cover plate layer includes a flat portion and a curved portion located outside the flat portion. The protection member includes a retaining wall and a first filling portion. The retaining wall is disposed on the side of the display panel away from the cover plate layer. The first filling portion is located in the enclosed area of the display panel, the retaining wall, and the curved portion, and is connected to at least a part of the curved portion. By providing a retaining wall on the side of the display panel facing away from the cover plate layer and filling the first filling portion between the retaining wall and the curved portion of the cover plate layer, the edge area of the display module is supported, improving the impact resistance performance of the display module in the edge area. At the same time, the structure of the single-sided retaining wall and the curved portion reduces the process difficulty of the protection member and improves the manufacturing efficiency.

[0123] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0124] In the above embodiments, each embodiment is described with emphasis. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0125] In the above embodiments, the structures shown in the drawings are only schematic diagrams, and the specific structure of the display panel of the present application is mainly described in the specification.

[0126] Among the embodiments, implementation manners, and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0127] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A display module, characterized in that, Comprising: A display panel, including a light-emitting surface; A cover plate layer provided on one side of the light-emitting surface of the display panel, the cover plate layer including a flat portion and a curved surface portion located on the periphery of the flat portion; And A protective member, including a retaining wall and a first filling portion, the retaining wall being provided on the side of the display panel away from the cover plate layer, the first filling portion being located within the enclosed area of the display panel, the retaining wall, and the curved surface portion, and being connected to at least a portion of the curved surface portion.

2. The display module according to claim 1, wherein The display module includes: A composite support layer; A display panel, including a first body, a second body, and a bending portion connecting the first body and the second body, the first body being disposed on a first side of the composite support layer, and the second body being disposed on a second side of the composite support layer opposite to the first side; Wherein, the retaining wall includes a first sub-retaining wall provided on the side of the bending portion away from the cover plate layer, the first filling portion includes a first sub-portion, the first sub-portion is located within the enclosed area of the bending portion, the first sub-retaining wall, and the curved surface portion, and is connected to at least a portion of the curved surface portion; or, The retaining wall includes a first sub-retaining wall provided on the side of the third body away from the cover plate layer, the first filling portion includes a first sub-portion, the first sub-portion is located within the enclosed area of the bending portion, the third body, the first sub-retaining wall, and the curved surface portion, and is connected to at least a portion of the curved surface portion.

3. The display module according to claim 2, wherein The retaining wall includes a second sub-retaining wall provided on the side of the composite support layer away from the display panel, the first filling portion includes a second sub-portion, and the second sub-portion is connected to at least the side surface of the first body, the side surface of the composite support layer, the second sub-retaining wall, and at least a portion of the curved surface portion.

4. The display module according to claim 3, wherein The distance between the surface of the second sub-retaining wall close to the curved surface portion and the side surface of the composite support layer is greater than or equal to 0.

5. The display module according to claim 3, wherein The protective member further includes a second filling portion connected to the first filling portion, and at least a portion of the second filling portion is located within the enclosed space between the bending portion and the composite support layer.

6. The display module according to claim 5, wherein The gelation rate of the first filling portion is different from the gelation rate of the second filling portion.

7. The display module according to claim 3, wherein The first sub-retaining wall and the second sub-retaining wall are connected, the retaining wall is a closed annular structure, the first sub-portion and the second sub-portion are connected, and the first filling portion is a closed annular structure.

8. The display module according to any one of claims 1 to 7, characterized in that, The curved surface portion includes an inner arc surface close to the display panel, and the included angle between the inner arc surface and the flat portion is greater than or equal to 45 degrees and less than or equal to 90 degrees.

9. The display module according to any one of claims 1 to 7, characterized in that, In the thickness direction of the display module, the distance between the surface of the curved surface portion away from the flat portion and the flat portion is greater than or equal to the distance between the surface of the retaining wall away from the display panel and the flat portion.

10. The display module according to any one of claims 1 to 7, characterized in that, The surface of the first filling portion away from the display panel and the surface of the retaining wall away from the display panel are located in the same plane.

11. The display module according to any one of claims 1 to 7, characterized in that, The Young's modulus of the retaining wall is greater than or equal to the Young's modulus of the first filling portion.

12. The display module according to any one of claims 1 to 7, characterized in that, The retaining wall includes a plurality of connected retaining wall units arranged in the thickness direction of the display module, and the outer wall of the retaining wall unit is convex.

13. The display module according to claim 12, wherein In the thickness direction of the display module, the width of the barrier wall closer to the display panel is greater than the width of the barrier wall farther from the display panel.

14. The display module according to claim 12, wherein The width of the barrier wall is from 0.08 mm to 1 mm.

15. The display module according to any one of claims 1 to 7, characterized in that, The curvature of the curved surface portion at one end closer to the flat surface portion is greater than the curvature of the curved surface portion at one end farther from the flat surface portion.

16. The display module according to claim 15, wherein The curved surface portion includes an inner arc surface closer to the display panel, and the curvature of the inner arc surface at one end farther from the flat surface portion is 0.

17. A display device, characterized in that, The display device includes the display module according to any one of claims 1 to 16 and a middle frame, and the first filling portion is disposed in the region between the middle frame and the display module.

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