Display module and display device

Abstract

A display module and a display device, the display module comprising a support sheet (111), a black adhesive layer (112) and a display panel (12), wherein the black adhesive layer (112) is disposed on the support sheet (111); and the display panel (12) is disposed on the side of the black adhesive layer (112) away from the support sheet (111), and the display panel (12) covers a bending region and a non-bending region.

Description

Display modules and display devices

[0001] This application claims priority to Chinese patent application No. 202510147041.1, filed on February 10, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, specifically to a display module and display device. Background Technology

[0003] In existing OLED foldable modules, the structure typically consists of a stacked stainless steel support sheet, adhesive layer, black polyimide film, adhesive layer, ultrathin polymer film, and adhesive layer below the OLED panel as a support structure, and a stacked adhesive layer, polarizer / ultrathin polymer film, adhesive layer, ultrathin glass, adhesive layer, and ultrathin polymer film above the OLED panel as a cover structure. The black polyimide film is used to conceal the stainless steel support sheet, achieving a seamless black appearance.

[0004] In the process of researching and practicing existing technologies, the inventors of this application discovered that creases are fatigue caused by the continuous bending and recovery of organic polymers, and this fatigue is irreversible for organic polymer films. Furthermore, existing OLED foldable modules have excessively thick organic polymer films, increasing the risk of creases. Invention Overview

[0005] This application provides a display module and display device that can reduce the thickness of the display module and the risk of creases while meeting the requirement of an all-black appearance.

[0006] On one hand, embodiments of this application provide a display module, including a bent area and a non-bent area disposed on at least one side of the bent area, comprising:

[0007] A support piece is disposed in the bending area and the non-bending area;

[0008] A black adhesive layer is disposed on the support sheet, the black adhesive layer covering the bending area and the non-bending area; and

[0009] A display panel is disposed on the side of the black adhesive layer away from the support sheet, and the display panel covers the bending area and the non-bending area.

[0010] On the other hand, embodiments of this application also provide a display device, which includes a display module as described in any of the above embodiments. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of the display module provided in an embodiment of this application;

[0012] Figure 2 is a schematic diagram of the display module in scale.

[0013] Figure 3 is a simulation comparison diagram of the ball drop experiment in the bending zone of the comparative example and Example 2;

[0014] Figure 4 is a simulation comparison diagram of the pen-dropping experiment in the bending area of ​​the comparative example and Example 2;

[0015] Figure 5 is a schematic diagram of another display module provided in an embodiment of this application;

[0016] Figure 6 is a structural schematic diagram of another display module provided in an embodiment of this application;

[0017] Figure 7 is a schematic diagram of another display module provided in an embodiment of this application;

[0018] Figure 8 is a schematic diagram of the structure of the display device provided in an embodiment of this application. Embodiments of the present invention

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific implementation methods described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, the embodiments can be combined with each other but will not be described in detail one by one. Unless otherwise stated, the directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device; the terms "first," "second," "third," etc. are only used as markings and do not impose numerical requirements or establish a sequence.

[0020] This application provides a display module and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0021] This application provides a display module, including a bent area and a non-bent area disposed on at least one side of the bent area, comprising:

[0022] A support piece is disposed in the bending area and the non-bending area;

[0023] A black adhesive layer is disposed on the support sheet, the black adhesive layer covering the bending area and the non-bending area; and

[0024] A display panel is disposed on the side of the black adhesive layer away from the support sheet, and the display panel covers the bending area and the non-bending area.

[0025] Optionally, in some embodiments of this application, the thickness of the black adhesive layer is between 15 micrometers and 35 micrometers.

[0026] Optionally, in some embodiments of this application, the elastic modulus of the black adhesive layer is between 10 kPa and 600 kPa.

[0027] Optionally, in some embodiments of this application, the display module further includes a cover plate assembly and a first optical adhesive layer;

[0028] The cover plate assembly includes a cover plate and a cover layer disposed on the side of the cover plate near the display panel. A first optical adhesive layer is attached to the cover layer on the side of the cover layer near the display panel. A groove is provided in the portion of the cover plate located in the bending area. The thickness of the portion of the cover plate located in the bending area is less than the thickness of the portion of the cover plate located in the non-bending area. The cover layer covers the side of the cover plate near the display panel and fills the groove. The thickness of the cover layer located in the groove is greater than the thickness of the portion of the cover layer located in the non-bending area.

[0029] Optionally, in some embodiments of this application, the elastic modulus of the covering layer is less than the elastic modulus of the cover plate.

[0030] Optionally, in some embodiments of this application, the elastic modulus of the covering layer is less than 1 gigapascal.

[0031] Optionally, in some embodiments of this application, the covering layer also covers the sidewalls of the cover plate.

[0032] Optionally, in some embodiments of this application, the cover plate assembly further includes a hardening layer and an anti-fingerprint layer, the hardening layer being formed on the side of the cover plate away from the display panel, and the anti-fingerprint layer being disposed on the side of the hardening layer away from the cover plate.

[0033] Optionally, in some embodiments of this application, the density of the support sheet is less than 5 grams per cubic centimeter.

[0034] Optionally, in some embodiments of this application, the material of the support sheet includes one of titanium alloy, aluminum alloy, and carbon fiber.

[0035] Optionally, in some embodiments of this application, the display module further includes a first protective layer, an adhesive, a second protective layer, and a second optical adhesive layer. The adhesive is attached to the side of the display panel near the black adhesive layer, and the first protective layer is attached between the adhesive and the black adhesive layer.

[0036] The second optical adhesive layer is attached to the side of the cover plate assembly away from the display panel, and the second protective layer is attached to the side of the second optical adhesive layer away from the display panel; or

[0037] The second optical adhesive layer is attached to the side of the display panel away from the support sheet, and the second protective layer is attached to the side of the second optical adhesive layer away from the display panel; the first optical adhesive layer is attached to the side of the second protective layer away from the display panel.

[0038] Optionally, in some embodiments of this application, the display module further includes a first protective layer, an adhesive, a polarizer, and a second optical adhesive layer. The adhesive is attached to the side of the display panel near the black adhesive layer, and the first protective layer is attached between the adhesive and the black adhesive layer.

[0039] The second optical adhesive layer is attached to the side of the display panel away from the support sheet, and the polarizer is attached to the side of the second optical adhesive layer away from the display panel; the first optical adhesive layer is attached to the side of the polarizer away from the display panel.

[0040] Accordingly, this application also provides a display device, which includes a display module as described in any of the above embodiments.

[0041] The display panel and display device of this application embodiment include a support sheet, a black adhesive layer and a display panel. The black adhesive layer is disposed on the support sheet and attached to it. The display panel is disposed on the side of the black adhesive layer away from the support sheet and covers the bending area and the non-bending area.

[0042] It should be noted that, in order to achieve a seamless black appearance, existing technologies employ a stacked structure of an adhesive layer, a black polyimide layer, and another adhesive layer between the support sheet and the display panel, where both the adhesive layer and the black polyimide layer are organic polymers. This application replaces the stacked structure of the adhesive layer, black polyimide layer, and another adhesive layer with a black adhesive layer to reduce the number of organic polymer layers and the total thickness, thereby reducing the thickness of the display module and the risk of creases, while simultaneously achieving a seamless black appearance.

[0043] Referring to Figure 1, this application embodiment provides a display module 100, including a bending area w1 and a non-bending area w2 disposed on at least one side of the bending area w1. The display module 100 includes a support sheet 111, a black adhesive layer 112, a display panel 12, and a cover plate assembly 13.

[0044] The support sheet 111 is disposed in the bending area w1 and the non-bending area w2. The black adhesive layer 112 is disposed on the support sheet 111 and covers the bending area w1 and the non-bending area w2.

[0045] The display panel 12 is disposed on the side of the black adhesive layer 112 away from the support sheet 111, and the display panel 12 covers the bent area w1 and the non-bent area w2. The cover plate assembly 13 is disposed on the side of the display panel 12 away from the support sheet 111.

[0046] It should be noted that creases are fatigue caused by the continuous bending and recovery of organic polymers, and this fatigue is irreversible for organic polymer films. Secondly, in order to achieve a seamless black appearance, existing technologies use a stacked structure of adhesive layer, black polyimide layer, and adhesive layer between the support sheet and the display panel, where both the adhesive layer and the black polyimide layer are organic polymers.

[0047] This application uses a black adhesive layer 112 to replace the stacked structure of adhesive layer, black polyimide layer and adhesive layer, in order to reduce the number of organic polymer layers and the total thickness, thereby reducing the thickness of the display module and the risk of creases. At the same time, the black adhesive layer 112 shields the support sheet 111 to achieve a one-piece black appearance.

[0048] Furthermore, it should be understood that the orange peel effect is an optical unevenness caused by the stacking of porous materials (such as foam), materials with high creep properties (such as optical adhesives / pressure-sensitive adhesives), and ultra-thin polymer films (such as polyethylene terephthalate / polyimide). The display module 100 of this application, based on the reduction of the number and total thickness of the organic polymer layers, also improves the orange peel effect and facilitates the thinning and weight reduction of the display module 100.

[0049] Optionally, the black adhesive layer 112 can be directly attached to the support sheet 111.

[0050] Optionally, in some embodiments of this application, the thickness of the black adhesive layer 112 is between 15 micrometers and 35 micrometers.

[0051] Understandably, the thinner the black adhesive layer 112, the lower the risk of creases and the weaker its adhesion. Therefore, based on the need to optimize creases and ensure adhesion, the thickness of the black adhesive layer 112 is selected to be between 15 micrometers and 35 micrometers. For example, the thickness of the black adhesive layer 112 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, 30 micrometers, 31 micrometers, 32 micrometers, 33 micrometers, 34 micrometers, or 35 micrometers.

[0052] Compared to existing technologies where the thickness of the stacked structure of adhesive layer, black polyimide layer and adhesive layer is between 65 micrometers and 150 micrometers, the thickness of black adhesive layer 112 is reduced by at least 1 / 3, resulting in a significant reduction in thickness.

[0053] Optionally, in some embodiments of this application, the elastic modulus of the black adhesive layer 112 is between 10 kPa and 600 kPa.

[0054] Understandably, the higher the elastic modulus of the black adhesive layer 112, the weaker its ability to absorb and release stress, and the stronger its impact resistance. Based on the bending and impact resistance requirements of the display module 100, the elastic modulus of the black adhesive layer 112 is selected to be between 10 kPa and 600 kPa. For example, the elastic modulus of the black adhesive layer 112 can be 10 kPa, 20 kPa, 30 kPa, 40 kPa, 50 kPa, 60 kPa, 70 kPa, 80 kPa, 90 kPa, 100 kPa, 110 kPa, 120 kPa, 130 kPa, 140 kPa, 150 kPa, 160 kPa, 170 kPa, 180 kPa, 190 kPa, 200 kPa, 210 kPa, 220 kPa, 230 kPa, 240 kPa, 250 kPa, etc. 0 kPa, 260 kPa, 270 kPa, 280 kPa, 290 kPa, 300 kPa, 410 kPa, 420 kPa, 430 kPa, 440 kPa, 450 kPa, 460 kPa, 470 kPa, 480 kPa, 490 kPa, 500 kPa, 510 kPa, 520 kPa, 530 kPa, 540 kPa, 550 kPa, 560 kPa, 570 kPa, 580 kPa, 590 kPa or 600 kPa.

[0055] It should be noted that the following is a comparison table between an embodiment 1 of the present application of the display module 100 using a black adhesive layer 112 and a comparative experiment of the display module 200 (shown in FIG. 2) using a stacked structure of a first adhesive layer 212, a black polyimide layer PI, and a second adhesive layer 214.

[0056]

[0057] It should be noted that the identical module structures in the comparative example and Example 1 refer to the fact that, apart from the difference in the buffer structure of the display module, all other structures are the same. For example, both use the same display panel and ultra-thin glass cover, etc. The ultra-thin glass cover is a conventional, non-patterned ultra-thin glass with a thickness of 30 micrometers. In other words, the only difference between the comparative example and Example 1 is the buffer structure.

[0058] As shown in Comparison Table 1, replacing the stacked structure of adhesive layer, black polyimide layer and adhesive layer with black adhesive layer 112 reduces the risk of creases, but also reduces the impact resistance of the display module.

[0059] Optionally, in some embodiments of this application, the black adhesive layer 112 includes a first portion located in the bending region w1 and a second portion located in the non-bending region w2. The elastic modulus of the first portion is smaller than that of the second portion, so as to maintain the support performance of the non-bending region w2 of the display panel 12 while improving the bending performance of the bending region w1.

[0060] Optionally, in some embodiments of this application, the interior of the first portion is formed with a porous structure to reduce the elastic modulus of the first portion. Optionally, the porous structure is a closed-cell structure, which is more advantageous for impact resistance than open-cell structures or through-hole structures.

[0061] Optionally, in some embodiments, the raw materials for the black adhesive layer 112 include a matrix material, a black filler, and a foaming agent.

[0062] Optionally, the black filler may be at least one of carbon black, black oxides (such as iron oxide), conductive carbon materials (such as graphene, conductive carbon black) and organic black pigments (such as aniline black).

[0063] Optionally, the matrix material may be at least one of silicone, polyurethane, acrylic resin, and epoxy resin. The content of the matrix material is between 60% and 80% of the total mass of the black adhesive layer 112 to ensure the adhesion of the black adhesive layer 112. Optionally, the content of the matrix material is 60%, 65%, 70%, 75%, or 80% of the total mass of the black adhesive layer 112.

[0064] Optionally, since black filler not only provides color but also enhances modulus, the content of black filler accounts for 5% to 20% of the total mass of the black adhesive layer 112. Too much filler will result in an excessively high elastic modulus, which is not conducive to bending in the bending zone w1; too little filler will affect the coloring effect. Optionally, the content of black filler accounts for 5%, 10%, 15%, or 20% of the total mass of the black adhesive layer 112.

[0065] Optionally, when the black filler is conductive carbon black, the conductivity and heat dissipation of the black adhesive layer 112 can be improved, thereby improving the heat dissipation and antistatic effect of the display module 100, thus saving the setting of heat dissipation layer and antistatic layer, and further thinning of the display module 100.

[0066] The foaming agent is used to form a porous structure, and its content is between 1% and 5% of the total mass of the black adhesive layer 112, in order to better control the porosity and pore size. Optionally, the content of the foaming agent is 1%, 2%, 3%, 4%, or 5% of the total mass of the black adhesive layer 112.

[0067] In some embodiments, the black adhesive layer 112 may further include a reinforcing material, which may be at least one of nanoparticles (such as silica, carbon nanotubes) and short fibers (such as aramid fibers). Optionally, the content of the reinforcing material is between 5% and 10% of the total mass of the black adhesive layer 112 to avoid over-curing. Optionally, the content of the reinforcing material is 5%, 6%, 7%, 8%, 9%, or 10% of the total mass of the black adhesive layer 112.

[0068] In some embodiments, the number of reinforcements in the first part per unit volume is less than the number of reinforcements in the second part, so as to avoid the impact resistance of the first part being too low while improving the impact resistance of the second part.

[0069] Optionally, in some embodiments of this application, the display module 100 further includes a cover plate assembly 13 and a first optical adhesive layer 141.

[0070] The cover plate assembly 13 includes a cover plate 131 and a cover layer 132 disposed on the side of the cover plate 131 near the display panel 12. A first optical adhesive layer 141 is attached to the cover layer 132 on the side near the display panel 12. A groove 13a is provided in the portion of the cover plate 131 located in the bending region w1. The thickness of the portion of the cover plate 131 located in the bending region w1 is less than the thickness of the portion of the cover plate 131 located in the non-bending region w2. The cover layer 132 covers the side of the cover plate 131 near the display panel 12 and fills the groove 13a. The thickness of the portion of the cover layer 132 located in the groove 13a is greater than the thickness of the portion of the cover layer 132 located in the non-bending region w2.

[0071] It is understood that the display module 100 in this embodiment uses a cover plate 131 with a smaller thickness in the bending area w1 and a larger thickness in the non-bending area w2. This not only maintains the bending requirement of the bending area w1 but also improves the impact resistance of the non-bending area w2. Secondly, the cover layer 132 covers the cover plate 131, which not only protects the cover plate 131 and provides a flat surface but also further improves the overall impact resistance of the display module 100.

[0072] In other words, the display module 100 in this embodiment improves its impact resistance by thickening the cover plate assembly 13, in order to compensate for the loss of impact resistance caused by the buffer structure using only the black adhesive layer 112.

[0073] Optionally, for example, the thickness of the portion of cover plate 131 located in the bending area w1 may be 30 micrometers, and the thickness of the portion of cover plate 131 located in the non-bending area w2 may be 70 micrometers. However, it is not limited to this; the thickness of cover plate 131 can be adaptively adjusted according to different needs.

[0074] Optionally, in some embodiments of this application, the elastic modulus of the cover layer 132 is less than that of the cover plate 131.

[0075] It is understandable that the cover layer 132 needs to fill the groove 13a, and the groove 13a is located in the bending area w1. Therefore, the elastic modulus of the cover layer 132 is less than the elastic modulus of the cover plate 131, so as to avoid the elastic modulus of the part of the cover plate assembly 13 located in the bending area w1 being too large, so as to meet the folding requirements of the bending area w1.

[0076] Optionally, the elastic modulus of the cover plate 131 is between 60 GPa and 90 GPa, for example, it can be 60 GPa, 65 GPa, 70 GPa, 75 GPa, 80 GPa, 85 GPa or 90 GPa.

[0077] It is understood that the higher the elastic modulus of the cover plate 131, the stronger its impact resistance and the weaker its bending performance. Therefore, in order to balance the requirements of bending performance and impact resistance, the elastic modulus of the cover plate 131 is selected to be between 60 GPa and 90 GPa. Optionally, in some embodiments of this application, the elastic modulus of the covering layer 132 is less than 1 / 60 of the elastic modulus of the cover plate 131, for example, it can be 1 / 60, 1 / 70, 1 / 80 or 1 / 90.

[0078] Understandably, given that the cover plate 131 meets the impact resistance requirements, the smaller the elastic modulus of the cover layer 132, the better the bending performance of the cover plate assembly 13 corresponding to the bending area w1, while also meeting the crease requirements.

[0079] Optionally, in some embodiments of this application, the elastic modulus of the cover layer 132 is less than 1 gigapascal (GPa). For example, the elastic modulus of the cover layer 132 is 0.9 GPa, 0.8 GPa, 0.7 GPa, 0.6 GPa, 0.5 GPa, 0.4 GPa, 0.3 GPa, 0.2 GPa, or 0.1 GPa.

[0080] Optionally, in some embodiments of this application, the cover layer 132 also covers the sidewall of the cover plate 131 to better protect the cover plate 131.

[0081] Optionally, in some embodiments of this application, the density of the support sheet 111 is less than 5 grams per cubic centimeter (g / cm^3).

[0082] It is understood that the density of the stainless steel (SUS) support sheet is 7.9 grams per cubic centimeter. The density of the support sheet 111 in the display module 100 of this application embodiment is less than 5 grams per cubic centimeter, which can reduce the weight of the support sheet 111 and thus reduce the weight of the display module 100.

[0083] Optionally, in some embodiments of this application, the material of the support sheet 111 includes one of titanium alloy, aluminum alloy and carbon fiber.

[0084] Understandably, compared to the stainless steel (SUS) support sheets mentioned above, in some products, the titanium alloy support sheet 111 has a density of 4.5 g / cm³, which can reduce weight by about 43%; the carbon fiber support sheet 111 has a density of 1.8 g / cm³, which can reduce weight by about 77%; and the aluminum alloy support sheet 111 has a density of 2.7 g / cm³, which can reduce weight by about 66%.

[0085] Optionally, in some embodiments of this application, the display module 100 further includes a first protective layer 151, an adhesive 143, a second protective layer 152, and a second optical adhesive layer 142. The adhesive 143 is attached to the side of the display panel 12 near the black adhesive layer 112, and the first protective layer 151 is attached between the adhesive 143 and the black adhesive layer 112.

[0086] The second optical adhesive layer 142 is attached to the side of the cover plate assembly 13 away from the display panel 12, and the second protective layer 152 is attached to the side of the second optical adhesive layer 142 away from the display panel 12.

[0087] Understandably, the first protective layer 151 is configured to protect the cover assembly 13, and the second protective layer 152 is configured to protect the display panel 12. At the same time, the arrangement of the first protective layer 151 and the second protective layer 152 can also improve the impact resistance of the display module 100.

[0088] Optionally, the materials of the first protective layer 151 and the second protective layer 152 may be organic polymers such as polyimide or polyethylene terephthalate.

[0089] Optionally, the display panel 12 has a polarizer-free architecture, that is, an architecture in which a color filter layer is used to replace the polarizer.

[0090] Please refer to Figures 3 and 4. Figure 3 is a simulation comparison diagram of the ball drop experiment in the bending area of ​​the comparative example and Example 2, and Figure 4 is a simulation comparison diagram of the pen drop experiment in the bending area of ​​the comparative example and Example 2.

[0091] Regarding Figures 3 and 4, it should be noted that in Figure 2, the comparative display module 200 includes, in sequence, a SUS support material 211, a first adhesive layer 212, a black polyimide layer P1, a second adhesive layer 214, a protective layer 215, a third adhesive layer 216, an OLED panel 22, a fourth adhesive layer 231, a polarizer 232, a fifth adhesive layer 233, a glass cover UTG, a sixth adhesive layer 235, and another protective layer 215. The thickness of the glass cover UTG is 50 micrometers.

[0092] The display module architecture of Embodiment 2 corresponds to that in Figure 1. The cover plate 131 of the display module 100 has a thickness of 50 micrometers in the bending region w1 and a thickness of 100 micrometers in the non-bending region w2. The support sheet 111 is made of either titanium alloy or aluminum alloy.

[0093] As shown in Figures 3 and 4, Example 2 exhibits better impact resistance compared to the comparative example. In other words, the display module 100 of this embodiment uses a black adhesive layer 112 combined with a non-SUS material support sheet 111 and a cover plate assembly 13, which can meet the impact resistance requirements while simultaneously reducing creases and achieving a thinner and lighter display module 100.

[0094] Secondly, as shown in Figures 3 and 4, when the bending area w1 of the cover plate 131 is 50 micrometers and the non-bending area is 100 micrometers, the impact resistance of the display module 100 is better than that of the display module 200 with a cover plate UTG of 50 micrometers. In other words, even though Example 2 reduces two organic polymer layers, by increasing the thickness of the non-bending area w2 of the cover plate 131 by a factor of two, a better impact resistance effect than the comparative example can be obtained.

[0095] Based on this, in some embodiments, the thickness of the portion of the cover plate 131 located in the non-bending region w2 is greater than or equal to twice the thickness of the portion of the cover plate 131 located in the bending region w1. This not only compensates for the lack of two organic polymer layers in terms of impact resistance, but also surpasses the comparative example in terms of impact resistance. That is, while optimizing the impact resistance of the display module 100, the risk of creases is reduced.

[0096] Figure 5 shows another structural schematic diagram of the display module 100 according to an embodiment of this application. In Figure 5, some differences from the embodiment corresponding to Figure 1 will be described to avoid redundant explanation.

[0097] In Figure 5, the second optical adhesive layer 142 is attached to the side of the display panel 12 away from the support sheet 111, and the second protective layer 152 is attached to the side of the second optical adhesive layer 142 away from the display panel 12. The first optical adhesive layer 141 is attached to the side of the second protective layer 152 away from the display panel 12.

[0098] Optionally, in some embodiments of this application, the cover plate assembly 13 may further include a hardened layer 133 and an anti-fingerprint layer 134, wherein the hardened layer 133 is formed on the side of the cover plate 131 away from the display panel 12, and the anti-fingerprint layer 134 is disposed on the side of the hardened layer 133 away from the cover plate 131.

[0099] Compared to attaching a protective film and an anti-fingerprint film to the side of the cover plate 131 away from the display panel 12, the present application embodiment forms a hardened layer 133 and an anti-fingerprint layer 134 directly on the cover plate 131, which can reduce one adhesive layer, and the thickness of the hardened layer 133 is less than the thickness of the conventional protective film, thereby further reducing the thickness of the display module 100.

[0100] Optionally, the hardness of the hardened layer 133 is greater than or equal to the hardness of the cover plate 131. The thickness of the hardened layer 133 is less than the thickness of the second protective layer 152.

[0101] It should be noted that the other structures of the display module 100 in the embodiment corresponding to Figure 5 are similar or the same as the other structures corresponding to Figure 1, so they will not be described again here.

[0102] Figure 6 shows another structural schematic diagram of the display module 100 according to an embodiment of this application. In Figure 6, parts that differ from the embodiment corresponding to Figure 1 will be described to avoid redundant explanation.

[0103] In Figure 6, in some embodiments of this application, the display module 100 further includes a first protective layer 151, an adhesive 143, a second protective layer 152, a second optical adhesive layer 142, a third optical adhesive 144, and a polarizer p1. The adhesive 143 is attached to the side of the display panel 12 near the black adhesive layer 112. The first protective layer 151 is attached between the adhesive 143 and the black adhesive layer 112.

[0104] The second optical adhesive layer 142 is attached to the side of the cover plate assembly 13 away from the display panel 12, and the second protective layer 152 is attached to the side of the second optical adhesive layer 142 away from the display panel 12.

[0105] The third optical adhesive layer 144 is attached to the side of the display panel 12 near the cover plate assembly 13. The polarizer pl is attached to the side of the display panel 12 near the cover plate assembly 13. The first optical adhesive layer 141 is attached to the side of the polarizer pl near the cover plate assembly 13.

[0106] It should be noted that, compared to the embodiment corresponding to FIG1, the display module 100 of the embodiment corresponding to FIG6 is a module provided with a polarizer p1. Furthermore, other structures of the embodiment corresponding to FIG6 are similar to or the same as those of the embodiment corresponding to FIG1, and therefore will not be described again here.

[0107] Figure 7 shows another structural schematic diagram of the display module 100 according to an embodiment of this application. In Figure 7, parts that differ from the embodiment corresponding to Figure 5 will be described to avoid redundant explanation.

[0108] In Figure 7, the second optical adhesive layer 142 is attached to the side of the display panel 12 away from the support sheet 111, and the polarizer p1 is attached to the side of the second optical adhesive layer 142 away from the display panel 12. The first optical adhesive layer 141 is attached to the side of the polarizer p1 away from the display panel 12.

[0109] It should be noted that, compared to the embodiment corresponding to FIG5, the display module 100 of the embodiment corresponding to FIG7 is a module provided with a polarizer pl. The provision of the polarizer pl can save the need for the second protective layer 152.

[0110] Furthermore, the other structures of the embodiment corresponding to Figure 7 are similar or the same as those of the embodiment corresponding to Figure 5, so they will not be described again here.

[0111] Referring to Figure 8, correspondingly, this application embodiment also provides a display device 1000, which includes the display module 100 as described in any of the above embodiments.

[0112] It should be noted that the structure of the display module 100 in the display device 1000 of this application embodiment is similar to or the same as the structure of the display module 100 in the above embodiments. For details, please refer to the descriptions in Figures 1 to 7, which will not be repeated here.

[0113] The display device 1000 of this application embodiment includes a support sheet 111, a black adhesive layer 112 and a display panel 12. The black adhesive layer 112 is disposed on the support sheet 111, and the display panel 12 is disposed on the side of the black adhesive layer 112 away from the support sheet 111. The display panel 12 covers the bending area w1 and the non-bending area w2.

[0114] It should be noted that, in order to achieve a seamless black appearance, existing technologies employ a stacked structure of an adhesive layer, a black polyimide layer, and another adhesive layer between the support sheet and the display panel, wherein both the adhesive layer and the black polyimide layer are organic polymers. This application uses a black adhesive layer 112 to replace the stacked structure of the adhesive layer, the black polyimide layer, and the adhesive layer, thereby reducing the number of organic polymer layers and the total thickness, thus reducing the thickness of the display module and the risk of creases, while simultaneously achieving a seamless black appearance.

[0115] Optionally, the display device 1000 can be applied to and used in a variety of products, including, for example, televisions, laptops, monitors, billboards, Internet of Things devices, and portable electronic devices including mobile phones, smartphones, tablet computers, mobile communication terminals, electronic notebooks, e-books, portable multimedia players, navigation devices, and ultra-mobile personal computers.

[0116] Furthermore, the display device 1000 according to some embodiments can be applied to wearable devices and can be used within wearable devices, including smartwatches, watch phones, glasses-type displays, and head-mounted displays. Additionally, according to some embodiments, the display device 1000 can be applied to instrument panels for automobiles, displays in central dashboards or central information displays arranged on instrument panels, interior mirror displays replacing side mirrors in automobiles, and displays for entertainment systems arranged on the back of the front seats for rear-seat passengers in automobiles.

[0117] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, comprising a bent area and a non-bent area disposed on at least one side of the bent area, the display module comprising: A support piece is disposed in the bending area and the non-bending area; A black adhesive layer is applied to the support sheet, and the black adhesive layer covers the bending area and the non-bending area; as well as A display panel is disposed on the side of the black adhesive layer away from the support sheet, and the display panel covers the bending area and the non-bending area.

2. The display module according to claim 1, wherein, The thickness of the black adhesive layer is between 15 micrometers and 35 micrometers.

3. The display module according to claim 2, wherein, The elastic modulus of the black adhesive layer is between 10 kPa and 600 kPa.

4. The display module according to any one of claims 1-3, wherein, The display module also includes a cover plate assembly and a first optical adhesive layer; The cover plate assembly includes a cover plate and a cover layer disposed on the side of the cover plate near the display panel. A first optical adhesive layer is attached to the cover layer on the side of the cover layer near the display panel. A groove is provided in the portion of the cover plate located in the bending area. The thickness of the portion of the cover plate located in the bending area is less than the thickness of the portion of the cover plate located in the non-bending area. The cover layer covers the side of the cover plate near the display panel and fills the groove. The thickness of the cover layer located in the groove is greater than the thickness of the portion of the cover layer located in the non-bending area.

5. The display module according to claim 4, wherein, The elastic modulus of the covering layer is less than that of the cover plate.

6. The display module according to claim 5, wherein, The elastic modulus of the covering layer is less than 1 gigapascal.

7. The display module according to claim 5, wherein, The covering layer also covers the sidewalls of the cover plate.

8. The display module according to claim 4, wherein, The cover plate assembly further includes a hardened layer and an anti-fingerprint layer, the hardened layer being formed on the side of the cover plate away from the display panel, and the anti-fingerprint layer being disposed on the side of the hardened layer away from the cover plate.

9. The display module according to claim 4, wherein, The density of the support sheet is less than 5 grams per cubic centimeter.

10. The display module according to claim 8, wherein, The material of the support sheet includes one of titanium alloy, aluminum alloy and carbon fiber.

11. The display module according to claim 9, wherein, The display module further includes a first protective layer, an adhesive, a second protective layer, and a second optical adhesive layer. The adhesive is attached to the side of the display panel near the black adhesive layer, and the first protective layer is attached between the adhesive and the black adhesive layer. The second optical adhesive layer is attached to the side of the cover plate assembly away from the display panel, and the second protective layer is attached to the side of the second optical adhesive layer away from the display panel; or The second optical adhesive layer is attached to the side of the display panel away from the support sheet, and the second protective layer is attached to the side of the second optical adhesive layer away from the display panel; the first optical adhesive layer is attached to the side of the second protective layer away from the display panel.

12. The display module according to claim 9, wherein, The display module further includes a first protective layer, an adhesive, a polarizer, and a second optical adhesive layer. The adhesive is attached to the side of the display panel near the black adhesive layer, and the first protective layer is attached between the adhesive and the black adhesive layer. The second optical adhesive layer is attached to the side of the display panel away from the support sheet, and the polarizer is attached to the side of the second optical adhesive layer away from the display panel; the first optical adhesive layer is attached to the side of the polarizer away from the display panel.

13. The display module according to any one of claims 1-3, wherein, The black adhesive layer includes a first portion located in the bending area and a second portion located in the non-bending area, wherein the elastic modulus of the first portion is less than that of the second portion.

14. The display module according to claim 13, wherein, The first part has a porous structure inside.

15. The display module according to claim 14, wherein, The hole structure is a closed-hole structure.

16. The display module according to claim 14, wherein, The raw materials of the black adhesive layer include a matrix material, a black filler, and a foaming agent. The matrix material accounts for 60% to 80% of the total mass of the black adhesive layer, the black filler accounts for 5% to 20% of the total mass of the black adhesive layer, and the foaming agent accounts for 1% to 5% of the total mass of the black adhesive layer.

17. The display module according to claim 16, wherein, The black adhesive layer also includes reinforcements, wherein the number of reinforcements in the first portion per unit volume is less than the number of reinforcements in the second portion.

18. A display device comprising a display module, the display module including a bending region and a non-bending region disposed on at least one side of the bending region, the display module comprising: A support piece is disposed in the bending area and the non-bending area; A black adhesive layer is applied to the support sheet, and the black adhesive layer covers the bending area and the non-bending area; as well as A display panel is disposed on the side of the black adhesive layer away from the support sheet, and the display panel covers the bending area and the non-bending area.

19. The display device according to claim 18, wherein, The thickness of the black adhesive layer is between 15 micrometers and 35 micrometers.

20. The display device according to claim 19, wherein, The elastic modulus of the black adhesive layer is between 10 kPa and 600 kPa.

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