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, a first supporting layer and a second supporting layer. The cover plate is arranged on one side of the display panel; the first supporting layer is arranged on the side, away from the cover plate, of the display panel; the second supporting layer is arranged on the side, away from the display panel, of the first supporting layer; wherein the elastic modulus of the first supporting layer is greater than or equal to that of the cover plate, and the elastic modulus of the second supporting layer is greater than that of the cover plate; the supporting performance and strength of the first supporting layer can be improved, so that on the basis of keeping certain supporting performance, the thickness of the first supporting layer can be thinner, compared with the prior art, the thickness of the display module and the number of film layers on the back side of the display panel can be effectively reduced, and therefore the display effect is improved on the basis of guaranteeing the strength of the display module. The display module can be lighter and thinner, the crease phenomenon of the display module can be improved, and the display effect of the display module is improved.

Description

Technical Field

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

[0002] Foldable display devices are a future technological trend, and folding has brought a new direction to the display industry. Currently, organic light-emitting diode (OLED) display devices are receiving more attention because they have unique bending and folding characteristics, which can be used to manufacture foldable display devices in various forms, making them easy to carry and store, and have attracted widespread market attention.

[0003] After being folded multiple times, creases are easily formed at the bending points of foldable display devices, which affects the display effect of the foldable display devices. Summary of the Invention

[0004] This application provides a display module and display device that can improve the crease phenomenon of the display module.

[0005] To achieve the above objectives, embodiments of this application provide a display module, which includes: Display panel; A cover plate is disposed on one side of the display panel; A first support layer is disposed on the side of the display panel away from the cover plate; The second support layer is disposed on the side of the first support layer away from the display panel; Wherein, the elastic modulus of the first support layer is greater than or equal to the elastic modulus of the cover plate, and the elastic modulus of the second support layer is greater than the elastic modulus of the cover plate.

[0006] In one embodiment of this application, the cover plate includes a glass layer and a covering layer disposed on at least a portion of the surface of the glass layer, wherein the elastic modulus of the first support layer is greater than or equal to the elastic modulus of the glass layer, and the elastic modulus of the second support layer is greater than the elastic modulus of the glass layer.

[0007] In one embodiment of this application, the glass layer includes a first surface and a side surface, the first surface being located on the side of the glass layer away from the display panel, the side surface being connected to the first surface, the cover layer covering the first surface and the side surface, and the cover plate further including a hardened layer disposed on the side of the cover layer away from the first surface.

[0008] In one embodiment of this application, the first support layer is attached to the side of the display panel away from the cover plate, and the second support layer is attached to the side of the first support layer away from the display panel.

[0009] In one embodiment of this application, the material of the first support layer is selected from at least one of stainless steel, aluminum alloy, titanium alloy, carbon fiber, and glass.

[0010] In one embodiment of this application, the thickness of the first support layer is greater than or equal to 15 micrometers and less than or equal to 30 micrometers.

[0011] In one embodiment of this application, the material of the second support layer is selected from metallic materials.

[0012] In one embodiment of this application, the display module further includes an impact-resistant layer disposed between the cover plate and the display panel, the material of the impact-resistant layer including a non-Newtonian fluid material.

[0013] In one embodiment of this application, the static loss factor of the impact-resistant layer is less than or equal to 0.1; And / or, the static elastic modulus of the impact-resistant layer is less than 1 gigapascal; And / or, when the impact-resistant layer is in a dynamic state, the energy absorption rate of the impact-resistant layer is greater than 20%; And / or, the thickness of the impact-resistant layer ranges from 20 micrometers to 100 micrometers.

[0014] In one embodiment of this application, the material of the impact-resistant layer includes thermoplastic polyurethane.

[0015] In one embodiment of this application, the display module includes at least one bent area and a non-bent area adjacent to the bent area, wherein the thickness of the first support layer located in the bent area is less than or equal to the thickness of the first support layer located in the non-bent area.

[0016] In accordance with the above-mentioned objectives of this application, embodiments of this application also provide a display device, the display device including the display module as described above.

[0017] This application provides a display module and display device. By increasing the elastic modulus of the first support layer on the back side of the display panel, the support and strength of the first support layer are improved. Therefore, while maintaining a certain level of support, the thickness of the first support layer can be made thinner. Compared with related technologies, this can effectively reduce the thickness of the display module and the number of film layers on the back side of the display panel. Thus, while ensuring the strength of the display module, the display module can be made thinner and lighter, which is beneficial to improving the crease phenomenon of the display module and improving the display effect of the display module.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of a display module provided in an embodiment of this application; Figure 2 A schematic diagram of a cover plate provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a display module in one embodiment; Figure 4 This is a schematic diagram of a display device provided for an embodiment of this application. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] Please refer to Figure 1 This application provides a display module, which includes a display panel 10, a cover plate 20, a first support layer 30 and a second support layer 40.

[0023] The cover plate 20 is disposed on one side of the display panel 10; the first support layer 30 is disposed on the side of the display panel 10 away from the cover plate 20; and the second support layer 40 is disposed on the side of the first support layer 30 away from the display panel 10.

[0024] The elastic modulus of the first support layer 30 is greater than or equal to the elastic modulus of the cover plate 20, and the elastic modulus of the second support layer 40 is greater than the elastic modulus of the cover plate 20.

[0025] In the implementation process, this application embodiment improves the support and strength of the first support layer 30 by increasing the elastic modulus of the first support layer 30 on the back side of the display panel 10. Therefore, while maintaining a certain level of support, the thickness of the first support layer 30 can be made thinner. Compared with related technologies, this can effectively reduce the thickness of the display module and the number of film layers on the back side of the display panel 10. Thus, while ensuring the strength of the display module, the display module can be made thinner and lighter, which is beneficial to improving the crease phenomenon of the display module and improving the display effect of the display module.

[0026] Specifically, please refer to Figure 1 The display module provided in this application embodiment includes a display panel 10 and multiple functional layers disposed on opposite sides of the display panel 10, so as to play a role in protection, support, and improving optical performance.

[0027] In some embodiments, the display panel 10 may be an organic light-emitting diode (OLED) display panel; wherein, the display panel 10 may include an array substrate, a light-emitting functional layer disposed on the array substrate, and an encapsulation layer, etc.

[0028] In some embodiments, the array substrate may include a substrate and a thin-film transistor layer disposed on the substrate.

[0029] In some embodiments, the substrate can be a rigid substrate, such as a glass substrate; or, the substrate can be a flexible substrate, such as a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate can be formed of multiple sub-substrates of the same material, such as polyimide, and adjacent sub-substrates are bonded together by adhesive sub-layers.

[0030] In some embodiments, the thin-film transistor layer includes a thin-film transistor, which includes a semiconductor located on the substrate. The semiconductor may be formed of polycrystalline silicon or a metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and source and drain regions formed on either side of the channel region. The thin-film transistor layer also includes a first gate insulating layer covering the semiconductor. The thin-film transistor also includes a first gate formed on the first gate insulating layer, overlapping the channel region. The first gate may be formed as multiple layers or a single layer comprising a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. The thin-film transistor layer also includes a second gate insulating layer covering the first gate. The thin-film transistor also includes a second gate located on the second gate insulating layer, overlapping the first gate. The second gate may be formed as multiple layers or a single layer comprising a low-resistance material such as Al, Ti, Mo, Cu, Ni, or alloys thereof, or a material with high corrosion resistance. The thin-film transistor layer also includes a first interlayer insulating layer formed on the second gate. The first interlayer insulating layer, the first gate insulating layer, and the second gate insulating layer include source contact holes and drain contact holes, and the source region and the drain region are exposed through the source contact holes and drain contact holes, respectively.

[0031] The thin-film transistor also includes a source and a drain disposed on the same layer. Both the source and drain are formed on the first interlayer insulating layer. The source is connected to the source region through a source contact hole, and the drain is connected to the drain region through a drain contact hole. The source and drain can be multiple layers or a single layer formed of low-resistance materials such as Al, Ti, Mo, Cu, Ni, or their alloys, or materials with high corrosion resistance. For example, the source and drain can be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti, or Mo / Al / Mo, or other single-layer or multi-layer structures.

[0032] In some embodiments, the planarization layer covers both the source and drain.

[0033] In some embodiments, the light-emitting functional layer may include a pixel definition layer and an anode layer disposed on a planarization layer; the anode layer includes a plurality of anodes disposed on the planarization layer, and a plurality of pixel openings corresponding to the plurality of anodes are formed in the pixel definition layer, with the pixel openings exposing the surface of the corresponding anode.

[0034] Furthermore, the light-emitting functional layer also includes a light-emitting layer disposed within multiple pixel openings, and the light-emitting layer is located on the side of the anode away from the planarization layer; the organic functional layer also includes a cathode layer disposed on the side of the light-emitting layer away from the anode; wherein, the anode is used to input holes into the light-emitting layer, the cathode layer is used to input electrons into the light-emitting layer, and the holes and electrons recombine in the light-emitting layer to excite light, thereby realizing the light-emitting function of the display panel.

[0035] In some embodiments, the encapsulation layer covers the cathode layer, and the encapsulation layer may include a stacked structure of organic and inorganic layers, wherein the organic layer can buffer stress, while the inorganic layer can block water and oxygen.

[0036] In some embodiments, the display panel 10 may further include a touch layer disposed on the side of the encapsulation layer away from the cathode layer, so that the display module has a touch function; wherein, the touch layer is not limited to self-capacitive or mutual-capacitive.

[0037] In some embodiments, the display module further includes a polarizer disposed on the light-emitting side of the display panel 10; and the polarizer can be a circular polarizer to reduce reflection; or, the display module adopts depolarizer technology, that is, a color filter layer is formed in the display panel 10, and the color filter layer is located on the light-emitting side of the light-emitting functional layer, which can also reduce reflection.

[0038] In some embodiments, the display module further includes a cover plate 20, which is disposed on the light-emitting side of the display panel 10 and can provide protection for the light-emitting surface of the display panel.

[0039] In some embodiments, the display module further includes a first support layer 30 and a second support layer 40 disposed sequentially on the back side of the display panel 10. That is, the first support layer 30 is located on the side of the display panel 10 away from the cover plate 20, and the second support layer 40 is located on the side of the first support layer 30 away from the display panel 10.

[0040] In this embodiment, the elastic modulus of the first support layer 30 is greater than or equal to the elastic modulus of the cover plate 20, and the elastic modulus of the second support layer 40 is greater than the elastic modulus of the cover plate 20. That is, the first support layer 30 is made of a material with a large elastic modulus to effectively improve the support for the display panel and the overall strength of the display module. Therefore, while maintaining a certain level of support, the thickness of the first support layer 30 can be made thinner. Compared with related technologies, this can effectively reduce the thickness of the display module and the number of film layers on the back side of the display panel 10. Thus, while ensuring or improving the strength of the display module, the display module can be made thinner and lighter, which is beneficial to improving the crease phenomenon of the display module and improving the display effect of the display module.

[0041] In some embodiments, please combine Figure 1 and Figure 2The cover plate 20 includes a glass layer 21, and the glass layer 21 has a small thickness. Specifically, the glass layer 21 can be ultra-thin glass (UTG), which can improve the support and bending performance of the cover plate 20 and the display module. In this embodiment, the elastic modulus of the first support layer 30 is greater than or equal to the elastic modulus of the glass layer 21, which can also improve the support of the back side of the display panel 10 and ensure the bending performance of the display module.

[0042] Similarly, the elastic modulus of the second support layer 40 is greater than that of the glass layer 21.

[0043] In some embodiments, the material of the first support layer 30 is selected from at least one of stainless steel, aluminum alloy, titanium alloy, carbon fiber, and glass.

[0044] In some embodiments, the thickness of the first support layer 30 is greater than or equal to 15 micrometers and less than or equal to 30 micrometers, for example, it can be 15 micrometers, 16 micrometers, 17 micrometers, 18 micrometers, 19 micrometers, 20 micrometers, 21 micrometers, 22 micrometers, 23 micrometers, 24 micrometers, 25 micrometers, 26 micrometers, 27 micrometers, 28 micrometers, 29 micrometers or 30 micrometers.

[0045] In some embodiments, the material of the second support layer 40 is selected from metallic materials, such as stainless steel or titanium alloy.

[0046] In some embodiments, the cover plate 20 further includes a covering layer 22 disposed on at least a portion of the surface of the glass layer 21, wherein the elastic modulus of the first support layer 30 is greater than the elastic modulus of the covering layer 22.

[0047] In some embodiments, the glass layer 21 includes a first surface 211 and a second surface 212 disposed opposite to each other in the thickness direction, and a side surface 213 connected between the first surface 211 and the second surface 212, wherein the first surface 211 is located on the side of the glass layer 21 away from the display panel 10, and the second surface 212 is located on the side of the glass layer 21 close to the display panel 10; the cover layer 22 covers the first surface 211 and the side surface 213 on the side of the glass layer 21 away from the display panel 10.

[0048] In some embodiments, the material of the cover layer 22 can be an organic resin material, such as at least one of polyimide, transparent polyimide, polyurethane, and polyurethane acrylate. The flexibility of the cover layer 22 is greater than that of the glass layer 21, that is, the elastic modulus of the cover layer 22 is less than that of the glass layer 21. Therefore, in the manufacturing process of the cover plate 20, when the cover layer covers the side surface 213 of the glass layer 21, on the one hand, it can prevent the glass from being directly cut during the cutting process of the glass layer 21, thus preventing the glass from breaking or cracking; on the other hand, the cover layer 22 can protect the side surface of the glass layer 21, improving the yield and service life of the cover plate 20.

[0049] In some embodiments, the cover plate 20 further includes a hardening layer 23 disposed on the side of the cover layer 22 away from the first surface 211, and the elastic modulus of the hardening layer 23 is greater than that of the cover layer 22. Since the cover layer 22 covers the first surface 211 of the glass layer 21, the side of the glass layer 21 closer to the first surface 211 has higher flexibility and lower support and rigidity. Therefore, this embodiment of the application improves the support and rigidity of the cover plate 20 away from the display panel 10 by providing the hardening layer 23 on the side of the cover layer 22 away from the first surface 211, thereby improving the tactile feel of the side of the cover plate 20 away from the display panel 10 and avoiding the phenomenon of a soft and flimsy feel.

[0050] In some embodiments, the material of the hardened layer 23 includes at least one of silicon oxide, aluminum oxide, and zirconium oxide.

[0051] In some embodiments, the first support layer 30 is attached to the side of the display panel 10 away from the cover plate 20, and the second support layer 40 is attached to the side of the first support layer 30 away from the display panel 10; that is, the display module further includes a first bonding layer 61 disposed between the first support layer 30 and the display panel 10 and a second bonding layer 62 disposed between the first support layer 30 and the second support layer 40, and the first support layer 30 is attached to the side of the display panel 10 away from the cover plate 20 through the first bonding layer 61, and the second support layer 40 is attached to the side of the first support layer 30 away from the display panel 10 through the second bonding layer 62.

[0052] It is understood that, since the first support layer 30 with a high elastic modulus is used in this embodiment, the number of film layers used for support on the back side of the display panel 10 can be reduced. Therefore, only the first bonding layer 61 is provided between the first support layer 30 and the display panel 10, and only the second bonding layer 62 is provided between the first support layer 30 and the second support layer 40.

[0053] In some embodiments, both the first bonding layer 61 and the second bonding layer 62 may be selected from OCA (Optically Clear Adhesive) optical adhesive.

[0054] Please refer to Figure 3 This is a contrast display module provided in related technologies. The contrast display module includes a contrast display panel 71, a protective layer 72 disposed on the light-emitting side of the contrast display panel 71, an ultra-thin glass layer 73 disposed on the side of the protective layer 72 away from the contrast display panel 71, an organic film 74 disposed on the side of the ultra-thin glass layer 73 away from the protective layer 72, a back plate layer 75 disposed on the side of the contrast display panel 71 away from the protective layer 72, a buffer layer 76 disposed on the side of the back plate layer 75 away from the contrast display panel 71, and a support plate 77 disposed on the side of the buffer layer 76 away from the back plate layer 75.

[0055] It should be noted that, Figure 3 In the contrast display module shown, a depolarization film technology is used, which means that a color filter layer can be set in the contrast display panel 71 to achieve the effect of reducing reflection, so there is no need to set a polarizer on the light-emitting side of the contrast display panel 71. In some embodiments, the protective layer 72 in the contrast display module can also be replaced with a polarizer, in which case the contrast display module is not manufactured using the depolarization film technology.

[0056] Furthermore, in Figure 3 The contrast display module shown further includes a first adhesive layer 781 disposed between the contrast display panel 71 and the protective layer 72, a second adhesive layer 782 disposed between the protective layer 72 and the ultra-thin glass layer 73, a third adhesive layer 783 disposed between the ultra-thin glass layer 73 and the organic film 74, a fourth adhesive layer 784 disposed between the contrast display panel 71 and the back panel layer 75, a fifth adhesive layer 785 disposed between the back panel layer 75 and the buffer layer 76, and a sixth adhesive layer 786 disposed between the buffer layer 76 and the support plate 77; wherein the first adhesive layer 781, the second adhesive layer 782, and the third adhesive layer 783 can all be selected from OCA optical adhesive, while the fourth adhesive layer 784, the fifth adhesive layer 785, and the sixth adhesive layer 786 can all be selected from PSA pressure-sensitive adhesive.

[0057] In some embodiments, the material of the backing layer 75 may be selected from polyethylene terephthalate (PET); the material of the buffer layer 76 may be selected from polyimide (PI).

[0058] It should be noted that in the display module provided in this application embodiment, the second support layer 40 and the support plate 77 in the comparison display module are both metal support materials. However, in this application embodiment, by setting the first support layer 30 with a large elastic modulus and a small thickness between the second support layer 40 and the display panel 10, the back plate layer 75 and the buffer layer 76 in the comparison display module can be replaced. This improves the support while also having high flexibility, and can also reduce the thickness and number of film layers of the display module, which is beneficial to improving the crease phenomenon of the display module.

[0059] In some embodiments, the thickness of the display module provided in this application can be greater than or equal to 350 micrometers and less than or equal to 550 micrometers; while Figure 3 The thickness of the comparison display module shown is typically around 600 micrometers. In this embodiment, by setting the first support layer 30, the thickness of the display module can be effectively reduced while ensuring the support and bending lines of the display module, thus achieving a thinner and lighter display module.

[0060] In some embodiments, the display module further includes an impact-resistant layer 50 disposed between the cover plate 20 and the display panel 10. The material of the impact-resistant layer 50 includes a non-Newtonian fluid material, specifically a shear-enhanced non-Newtonian fluid material. Since the impact-resistant layer 50 possesses the characteristics of a shear-enhanced non-Newtonian fluid, it hardens rapidly upon impact, significantly hindering the diffusion of impact force to the display panel 10, thereby improving the impact resistance of the display module. Furthermore, based on the shear-enhanced non-Newtonian fluid characteristics of the impact-resistant layer 50, it exhibits good elasticity in a static state, giving it excellent bending performance to meet the bending requirements of the display module.

[0061] In some embodiments, the static loss factor of the impact-resistant layer 50 is less than or equal to 0.1, for example, it can be 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03 or 0.02, etc.

[0062] In some embodiments, the static elastic modulus of the impact-resistant layer 50 is less than 1 gigapascal.

[0063] In some embodiments, when the impact-resistant layer 50 is in a dynamic state, the energy absorption rate of the impact-resistant layer 50 is greater than 20%, for example, it can be 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, or 45%, etc.

[0064] In some embodiments, the thickness of the impact-resistant layer 50 ranges from 20 micrometers to 100 micrometers, for example, it can be 20 micrometers, 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers, 55 micrometers, 60 micrometers, 65 micrometers, 70 micrometers, 75 micrometers, 80 micrometers, 85 micrometers, 90 micrometers, 95 micrometers or 100 micrometers.

[0065] It should be noted that the material of the impact-resistant layer 50 includes a shear-enhanced non-Newtonian fluid material, thus possessing the characteristics of a shear-enhanced non-Newtonian fluid. Therefore, the rheological behavior of the impact-resistant layer 50 is divided into two states: static and dynamic. The static state refers to the fluid exhibiting solid-like elastic behavior under low or no shear rate conditions, with a stable internal particle and / or polymer network structure. The dynamic state refers to the fluid rapidly transforming into a solid-like state due to shear thickening (dilatancy) under high shear rate or rapid impact, resisting deformation. Therefore, the static elastic modulus is the elastic modulus of the impact-resistant layer 50 in the static state, and the static loss factor is the loss factor of the impact-resistant layer 50 in the static state.

[0066] The larger the loss factor, the greater the viscosity and the lower the elasticity of the material; the smaller the loss factor, the greater the elasticity of the material. Therefore, the static loss factor of the impact-resistant layer 50 is less than or equal to 0.1, which makes the impact-resistant layer 50 have good elasticity when bent, making it easy to bend.

[0067] In some embodiments, the material of the impact-resistant layer 50 includes thermoplastic polyurethane, for example, a thermoplastic polyurethane slurry.

[0068] In some embodiments, the display module further includes a third bonding layer 63 disposed between the impact-resistant layer 50 and the cover plate 20, and a fourth bonding layer (not shown in the figure) disposed between the impact-resistant layer 50 and the display panel 10.

[0069] In some embodiments, both the third bonding layer 63 and the fourth bonding layer may be selected from OCA optical adhesive.

[0070] In some embodiments, the display module provided in this application is a foldable display module. The display module includes at least one bending area and a non-bending area adjacent to the bending area. The thickness of the first support layer 30 located in the bending area is less than or equal to the thickness of the first support layer 30 located in the non-bending area. That is, the first support layer 30 can be thinned or patterned in the bending area to further improve the bending performance of the display module.

[0071] In some embodiments, the display module may have multiple bending areas, and each bending area has non-bending areas on both sides. Correspondingly, the display module may be a single-fold, double-fold, triple-fold, or multi-fold display module, and the display module is not limited to outward or inward folding.

[0072] In some embodiments, the thickness of the glass layer 21 located in the bending region is less than or equal to the thickness of the glass layer 21 located in the non-bending region. For example, a groove or other structure can be formed in the glass layer 21 located in the bending region. This can also increase the bending performance of the display module. In addition, the second support layer 40 can form a patterned structure in the bending region, such as holes that penetrate the second support layer 40 and / or partially penetrate the second support layer 40, to improve the bending performance of the second support layer 40 in the bending region.

[0073] Furthermore, in this embodiment, the material of the first support layer 30 can be selected from at least one of stainless steel, aluminum alloy, titanium alloy, carbon fiber and glass. It should be noted that when the first support layer 30 is selected from a material with a larger elastic modulus, the thickness of the first support layer 30 can be set to be thinner, that is, the thickness of the first support layer 30 and the elastic modulus of the first support layer 30 can be negatively correlated.

[0074] In addition, in this embodiment of the application, the elastic modulus and weight reduction of the first support layer 30 when it is made of different materials were verified, and the data shown in Table 1 below were obtained.

[0075] Table 1

[0076] PI stands for polyimide, and PET stands for polyethylene terephthalate.

[0077] As can be seen from Table 1, in the material selection of the first support layer 30 in the embodiments of this application, relative to Figure 3The comparison shown indicates that the materials of the backplate layer 75 and the buffer layer 76 in the module have a higher elastic modulus, which can effectively improve the support of the first support layer 30.

[0078] Furthermore, comparative examples and embodiments are provided in this application to illustrate... Figure 1 The display module and Figure 3 The comparison shown verifies the module's creases, orange peel effect, dust resistance, and mechanical properties.

[0079] Comparative example Figure 3 The comparison display module shown includes the following: the protective layer 72 is made of polyethylene terephthalate with a thickness of 23 micrometers; the ultra-thin glass layer 73 has a thickness of 50 micrometers; the organic film 74 is made of polyethylene terephthalate with a thickness of 53 micrometers; the backplate layer 75 is made of polyethylene terephthalate with a thickness of 50 micrometers; the buffer layer 76 is made of polyimide doped with carbon black with a thickness of 25 micrometers; the support plate 77 is made of stainless steel with a thickness of 150 micrometers; and the first adhesive layer 781... The second adhesive layer 782 and the third adhesive layer 783 are both optical adhesives made of acrylic material. The thickness of the first adhesive layer 781 is 20 micrometers, the thickness of the second adhesive layer 782 is 50 micrometers, and the thickness of the third adhesive layer 783 is 25 micrometers. The fourth adhesive layer 784, the fifth adhesive layer 785, and the sixth adhesive layer 786 are all made of pressure-sensitive adhesives based on acrylic system. The thickness of the fourth adhesive layer 784 is 25 micrometers, the thickness of the fifth adhesive layer 785 is 25 micrometers, and the thickness of the sixth adhesive layer 786 is 15 micrometers.

[0080] The example is as follows Figure 1 The display module shown includes an impact-resistant layer 50 made of polyurethane with a thickness of 23 micrometers; a glass layer 21 with a thickness of 60 micrometers; a cover layer 22 made of polyimide with a thickness of 30 micrometers; a first support layer 30 made of ultra-thin glass with a thickness of 20 micrometers; a second support layer 40 made of stainless steel with a thickness of 120 micrometers; a first bonding layer 61 and a second bonding layer 62 both made of acrylic pressure-sensitive adhesive with a thickness of 25 micrometers; a third bonding layer 63 and a fourth bonding layer both made of acrylic OCA optical adhesive with a thickness of 50 micrometers.

[0081] It should be noted that the same display panel is used in both the comparison display module and the display module, that is, the display panel 10 and the comparison display panel 71 are the same display panel, and both can be selected from display panels with a depolarizer structure.

[0082] Furthermore, thickness measurement, crease test, orange peel test, dustproof test, and ball drop test of the comparison display module and display module in the comparative example and embodiment were performed respectively.

[0083] The crease height difference test method is as follows: Before bending, the bending area of ​​the display module is longitudinally scanned under a laser microscope to measure the crease height difference cross-section of the bending area; then, after static bending for 72 hours, the height difference at the same position is measured again; the data after bending - before bending is △H.

[0084] Orange Peel Test: Special raster equipment: The dense lines of the image are projected onto the surface of the display module. The orange peel is judged by the straightness of the lines. The orange peel of the Motorola Razr 60 display surface is considered good and is recorded as the base. Based on this, it is judged as poor or good.

[0085] Dustproof test: Fixed gravel was used to press the back of the display module, and the pressing pressure was tested to show the appearance of cracks.

[0086] Drop ball test: Place the display module on a rigid platform and drop a 10g steel ball onto the display surface in free fall. If black spots / bright spots / other defects appear on the screen, it is considered drop ball data.

[0087] The data obtained using the above testing methods are shown in Table 2 below.

[0088] Table 2

[0089] In the dustproof test, the extrusion pressure represented by 2X+ is greater than that represented by 1X, which indicates that the dustproof effect of the display module in the embodiment is better than that of the comparative display module in the comparative example.

[0090] As shown in Table 2, the embodiments of this application provide Figure 1 The display module shown is relative to Figure 3 Compared to the comparative display module shown, the thickness is effectively reduced, which is more conducive to achieving the requirement of a thinner and lighter display module. Furthermore, the height difference generated during the crease test of the display module provided in this application embodiment is much smaller than that of the comparative display module in the comparison example, indicating that the present application embodiment can effectively improve the crease phenomenon of the display module. In addition, the display module provided in this application embodiment is superior to the comparative display module in improving the orange peel effect and dustproof effect, and the impact resistance of the display module provided in this application embodiment in the drop ball test is also much better than that of the comparative display module.

[0091] In summary, this embodiment of the application improves the support and strength of the first support layer 30 by increasing the elastic modulus of the first support layer 30 on the back side of the display panel 10. Therefore, while maintaining a certain level of support, the thickness of the first support layer 30 can be made thinner. Compared with related technologies, this effectively reduces the thickness of the display module and the number of film layers on the back side of the display panel 10. Thus, while ensuring or improving the strength of the display module, it makes the display module thinner and lighter, which is beneficial for improving the crease phenomenon, orange peel effect, and dustproof effect of the display module. The display module exhibits superior display performance. Furthermore, in this embodiment, an impact-resistant layer 50 is provided in the display module. This impact-resistant layer 50 possesses the characteristics of a shear-enhanced non-Newtonian fluid. Therefore, when the impact-resistant layer 50 is subjected to impact, it rapidly hardens, significantly preventing the impact force from spreading to the display panel 10, thereby improving the impact resistance of the display module. Secondly, based on the shear-enhanced non-Newtonian fluid characteristics of the impact-resistant layer 50, it also exhibits good elasticity in a static state, giving it excellent bending performance to meet the bending requirements of the display module.

[0092] Additionally, please refer to Figure 4 This application also provides a display device 80, which includes a display module 81 as described in the above embodiments.

[0093] In some embodiments, the display device 80 may be a mobile phone, tablet, computer, television, wearable device, or virtual reality display device, etc.

[0094] It is understood that the display device 80 provided in this application embodiment has the same display module as in the above embodiments. Therefore, the display device 80 has the same beneficial effects as the display module described in the above embodiments, and will not be repeated here.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0098] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module, characterized in that, include: Display panel; A cover plate is disposed on one side of the display panel; A first support layer is disposed on the side of the display panel away from the cover plate; The second support layer is disposed on the side of the first support layer away from the display panel; Wherein, the elastic modulus of the first support layer is greater than or equal to the elastic modulus of the cover plate, and the elastic modulus of the second support layer is greater than the elastic modulus of the cover plate.

2. The display module according to claim 1, characterized in that, The cover plate includes a glass layer and a covering layer disposed on at least a portion of the surface of the glass layer, wherein the elastic modulus of the first support layer is greater than or equal to the elastic modulus of the glass layer, and the elastic modulus of the second support layer is greater than the elastic modulus of the glass layer.

3. The display module according to claim 2, characterized in that, The glass layer includes a first surface and a side surface. The first surface is located on the side of the glass layer away from the display panel. The side surface is connected to the first surface. The cover layer covers the first surface and the side surface. The cover plate also includes a hardened layer disposed on the side of the cover layer away from the first surface.

4. The display module according to claim 1, characterized in that, The first support layer is attached to the side of the display panel away from the cover plate, and the second support layer is attached to the side of the first support layer away from the display panel.

5. The display module according to claim 1, characterized in that, The material of the first support layer is selected from at least one of stainless steel, aluminum alloy, titanium alloy, carbon fiber and glass.

6. The display module according to claim 1, characterized in that, The thickness of the first support layer is greater than or equal to 15 micrometers and less than or equal to 30 micrometers.

7. The display module according to claim 1, characterized in that, The material of the second support layer is selected from metallic materials.

8. The display module according to any one of claims 1 to 7, characterized in that, The display module also includes an impact-resistant layer disposed between the cover plate and the display panel, the material of which includes a non-Newtonian fluid material.

9. The display module according to claim 8, characterized in that, The static loss factor of the impact-resistant layer is less than or equal to 0.1; And / or, the static elastic modulus of the impact-resistant layer is less than 1 gigapascal; And / or, when the impact-resistant layer is in a dynamic state, the energy absorption rate of the impact-resistant layer is greater than 20%; And / or, the thickness of the impact-resistant layer ranges from 20 micrometers to 100 micrometers.

10. The display module according to claim 8, characterized in that, The impact-resistant layer is made of thermoplastic polyurethane.

11. The display module according to any one of claims 1 to 7, characterized in that, The display module includes at least one bent area and a non-bent area adjacent to the bent area, wherein the thickness of the first support layer located in the bent area is less than or equal to the thickness of the first support layer located in the non-bent area.

12. A display device, characterized in that, The display device includes a display module as described in any one of claims 1 to 11.

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