Display module and mobile terminal

Abstract

The embodiment of the application discloses a display module and a mobile terminal, the display module comprises a display panel and a polaroid, the polaroid is arranged on the light-emitting side of the display panel, the polaroid comprises a neutral layer, the polaroid comprises a pressure-sensitive adhesive layer, a wave plate layer, a polarizing substrate layer, an adhesive layer and a first functional layer arranged on the light-emitting side of the display panel in sequence; wherein the polarizing substrate layer is located on the side of the neutral layer of the polaroid close to the pressure-sensitive adhesive layer. The embodiment of the application sets the polarizing substrate layer in the polaroid which is easy to be deformed by temperature on the side of the neutral layer close to the pressure-sensitive adhesive layer, so that after the polaroid is affected by temperature, the side of the polaroid facing the display panel is deformed by contraction, the deformation bending direction of the polaroid is the same as the bending direction of the four-curved display panel, the pulling stress of the glass cover plate of the display panel on the film layer of the polaroid can be reduced under the subsequent bonding and reliability high-temperature conditions, and the risk of film layer fragmentation under the reliability high-temperature conditions is reduced.

Description

[0001] This application is a divisional application of the invention patent application filed on October 9, 2021, with application number 202111176283.1 and invention title "Display Module and Mobile Terminal". Technical Field

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

[0003] With the development of flexible OLED (Organic Electroluminescence Display) technology, existing mobile phone cover plates have changed from the original planar structure to a curved structure.

[0004] To enable display and touch functionality on the sides of mobile phone covers and further optimize this functionality, the manufacturing process places high demands on products with large curvature bends, especially on the materials of quad-curved OLED display panels and modules. The reliability and manufacturing process of display panels with large curvature bends are prone to interlayer breakage, which can easily lead to display abnormalities in the curved display area of ​​quad-curved screens. Therefore, there is an urgent need for a display module that can solve the problem of interlayer breakage in the curved display area of ​​quad-curved screen panels. Summary of the Invention

[0005] This application provides a display module and a mobile terminal, which can solve the problems of reliability and easy interlayer breakage of the film layer in the bending area of ​​the four-curved screen display panel during the manufacturing process.

[0006] This application embodiment provides a display module, the display module comprising:

[0007] Display panel; and

[0008] A polarizer is disposed on the light-emitting side of the display panel. The polarizer includes a neutral layer and includes a pressure-sensitive adhesive layer, a waveplate layer, a polarizing substrate layer, an adhesive layer and a first functional layer disposed sequentially on the light-emitting side of the display panel.

[0009] The polarizing substrate layer is located on the side of the neutral layer in the polarizer that is close to the pressure-sensitive adhesive layer.

[0010] Optionally, the formula for calculating the neutral layer is:

[0011]

[0012] Wherein, E i Let T be the elastic modulus of the material of the i-th film layer. i Y is the thickness of the i-th film layer.i Y is the distance between the center surface of the i-th film layer and the side of the pressure-sensitive adhesive layer near the display panel, and Y is the distance between the neutral layer and the side of the pressure-sensitive adhesive layer near the display panel. i∈{1,2,3,4,5,n is a natural number}, where 1 indicates that the corresponding film layer is the pressure-sensitive adhesive layer, 2 indicates that the corresponding film layer is the waveplate layer, 3 indicates that the corresponding film layer is the polarizing substrate layer, 4 indicates that the corresponding film layer is the adhesive layer, and 5 indicates that the corresponding film layer is the first functional layer.

[0013] Optionally, the first functional layer is a polarizer substrate protective layer, the material of the first functional layer includes cellulose triacetate, and the thickness of the first functional layer is 20-40 μm.

[0014] Optionally, the waveplate layer is made of a liquid crystal quarter-wave plate, and the thickness of the waveplate layer is 3–7 μm.

[0015] Optionally, a second functional layer is provided on the side of the first functional layer opposite to the polarizer substrate layer, and the second functional layer includes one of a hardened coating, an anti-reflective coating, or an anti-fingerprint coating.

[0016] Optionally, the second functional layer is a hardened coating, and the hardened coating material includes optical adhesive.

[0017] Optionally, the display panel includes a flat display area and a curved display area adjacent to the flat display area;

[0018] The thickness of the polarizing substrate layer located in the planar display area is greater than the thickness of the polarizing substrate layer located in the bent display area.

[0019] Optionally, the thickness of the polarizing substrate layer located in the bent display area gradually decreases in the direction away from the planar display area.

[0020] Optionally, the bending display area includes a plurality of side bending display areas and corner bending display areas located around the periphery of the planar display area, and a corner bending display area is provided between any two adjacent side bending display areas;

[0021] The thickness of the polarizing substrate layer in the corner-bent display area is less than the thickness of the polarizing substrate layer in the side-bent display area.

[0022] This application also provides a mobile terminal, including the display module and terminal body described in any of the above embodiments, wherein the terminal body and the display module are integrated into one unit.

[0023] The beneficial effects of this invention include at least the following:

[0024] This application places the polarizer on the light-emitting side of the display panel, and places the polarizing substrate layer, which is susceptible to shrinkage due to temperature, on the side of the neutral layer near the pressure-sensitive adhesive layer. This causes the polarizer to shrink and deform towards the display panel when affected by temperature, making the bending direction of the polarizer the same as the bending direction of the four-curved display panel. This reduces the tensile stress of the glass cover plate on the polarizer film layer under subsequent bonding and high-temperature conditions, thus reducing the risk of film layer breakage under subsequent bonding and high-temperature conditions. Attached Figure Description

[0025] 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 accompanying 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.

[0026] Figure 1 This is a schematic diagram of the film structure of a polarizer in the prior art;

[0027] Figure 2 This is a schematic diagram of the deformation of a polarizer under high temperature conditions during a reliability test in the prior art;

[0028] Figure 3 This is a schematic diagram of the film structure of a polarizer provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the deformation of a polarizer under high temperature conditions during a reliability test, provided in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of another polarizer film structure provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of an assembly structure of a panel body and a polarizer provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of a polarizer structure provided in an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of another polarizer structure provided in an embodiment of this application. Detailed Implementation

[0034] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] This application provides a display panel, a method for manufacturing the display panel, and a mobile terminal. These are 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. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the present invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single digits within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0036] To enable display and touch functionality on the sides of a phone's cover glass, and to further optimize this functionality, the manufacturing process of mobile phones places high demands on products with large curvature bends, especially on the materials of quad-curved OLED display panels and modules. The reliability and manufacturing process of display panels with large curvature bends are prone to interlayer breakage, which can easily lead to display abnormalities in the four-curved bend area of ​​a quad-curved screen. Therefore, there is an urgent need for a display module that can solve the problem of interlayer breakage in the bending area of ​​quad-curved display panels.

[0037] Currently, the display module includes a display panel (DP) and a polarizer (POL). The polarizer (POL) is located on the light-emitting side of the display panel (DP). When the display panel (DP) is a four-curved OLED display panel, the light-emitting side of the display panel (DP) is a convex curved surface, such as... Figure 1As shown, a polarizer POL generally includes a polarizing substrate layer 30, TAC layers disposed on both sides of the polarizing substrate layer 30, an upper protective layer 101 facing away from the light-emitting side of the display panel DP, a PET layer coated on the side of the upper protective layer 101 facing away from the light-emitting side of the display panel DP as a protective film layer, and a lower protective layer 102 on the side of the lower protective layer 102 facing the display panel DP. A waveplate layer 50, which acts as a quarter-wave plate, is disposed on the side of the lower protective layer 102 facing the display panel DP. The material of the waveplate layer 50 is generally polycarbonate (PC) or cyclic olefin polymer (COP). The waveplate layer 50 is bonded to the display panel DP by a pressure-sensitive adhesive layer 60.

[0038] Because the display panel DP is bonded to the polarizer POL, the polarizing substrate layer 30 within the polarizer POL is susceptible to deformation due to temperature. Under high temperatures, the polarizing substrate layer 30 easily deforms, causing the polarizer POL to bend overall. When the bending direction of the polarizer POL is opposite to that of the four-curved OLED display panel DP, such as... Figure 2 As shown, the polarizing substrate layer 30 in the polarizer POL, which needs to shrink, is easily pulled by the DP glass cover of the quad-curved OLED display panel, which can easily cause the film layer between the display modules to crack. Under reliable high-temperature conditions, the cracking situation is even worse.

[0039] To address the aforementioned problems, this application provides the following technical solution, please refer to the details below. Figures 3-8 ;

[0040] This application provides a display module, such as... Figure 3 As shown, the display module includes:

[0041] Display panel DP;

[0042] Specifically, the display panel DP is a four-curved display panel, and the display panel DP can be an OLED display panel; the display panel DP includes at least one bending segment, presenting an upward convex arc shape, forming a curved display panel;

[0043] A polarizer POL is disposed on the light-emitting side of the display panel DP. The polarizer POL includes a neutral layer CL and includes a pressure-sensitive adhesive layer 60, a waveplate layer 50, a polarizing substrate layer 30, an adhesive layer 20 and a first functional layer 10 disposed sequentially on the light-emitting side of the display panel DP.

[0044] Specifically, the polarizer POL includes a neutral layer CL. It should be noted that during the bending process, the outer layer of the material is stretched and the inner layer is compressed. On its cross-section, there will inevitably be a transition layer that is neither subjected to tension nor pressure, and the stress is almost zero. This transition layer is called the neutral layer CL of the material.

[0045] Specifically, the material of the pressure-sensitive adhesive layer 60 can be acrylate.

[0046] Specifically, the material of the waveplate layer 50 has a small elastic modulus, and can be a liquid crystal material. When the material of the waveplate layer 50 is a liquid crystal, its thickness can be 3 to 7 μm, specifically 3 μm, 4 μm, 5 μm, 7 μm, etc.

[0047] Specifically, the polarizing substrate layer 30 is a film layer in the polarizer POL that plays a polarizing function. The material of the polarizing substrate layer 30 is usually polyvinyl alcohol. Polyvinyl alcohol has transparency, high ductility, good iodine adsorption, and good film-forming properties.

[0048] Specifically, the first functional layer 10 is a protective layer with certain support, optical uniformity, and high transparency. It is resistant to acids, alkalis, and ultraviolet rays. The first functional layer 10 is attached to the side of the polarizing substrate layer 30 away from the display panel DP, which can play a role in isolating water and oxygen, preventing the polarizing substrate layer 30 from being corroded and degraded by water and oxygen, ensuring the environmental weather resistance of the polarizer POL, and improving the service life of the polarizer POL. The material of the first functional layer 10 is mainly cellulose triacetate, and the thickness can be 20-40 μm, specifically 20 μm, 25 μm, 30 μm, 35 μm or 40 μm. This application does not impose any restrictions and can be determined according to actual production needs.

[0049] The polarizing substrate layer 30 is located on the side of the neutral layer CL in the polarizer POL that is close to the pressure-sensitive adhesive layer 60.

[0050] It is understandable that, such as Figure 3 and Figure 4 As shown, by placing the polarizer POL on the light-emitting side of the display panel DP, and placing the polarizing substrate layer 30, which is susceptible to deformation due to temperature, on the side of the neutral layer CL of the polarizer POL close to the pressure-sensitive adhesive layer 60, the polarizer POL will shrink and deform towards the display panel DP after being affected by temperature. This makes the bending direction of the polarizer POL the same as the bending direction of the four-curved display panel. Under subsequent bonding and high-temperature conditions, the tensile stress of the glass cover of the display panel DP on the polarizer POL film layer can be reduced, thus reducing the risk of film layer breakage under subsequent bonding and high-temperature conditions.

[0051] Following the above embodiments, and Figure 1 Compared to the prior art, the polarizer POL of this application eliminates the lower protective layer and the hard coating (HC) located outside the upper protective layer.

[0052] It is understandable that when the second functional layer 40 is the HC layer in the prior art, the HC layer is thin and brittle. When the bending angle of the curved display is too large, the HC layer will also break, affecting the quality of the display module. Since the HC layer is thin and does not have optical properties, the HC layer can be removed in display modules with large bending angles according to actual needs, so as to prevent the film layer from breaking and affecting the display effect in the display module. In addition, the thinness of the HC layer has little impact on the position of the neutral layer CL and does not affect the normal use of the polarizer POL.

[0053] In one embodiment, the formula for calculating the neutral layer CL is:

[0054]

[0055] Wherein, E i Let T be the elastic modulus of the material of the i-th film layer. i Y is the thickness of the i-th film layer. i Y is the distance between the center surface of the i-th film layer and the side of the pressure-sensitive adhesive layer 60 near the display panel DP, and Y is the distance between the neutral layer CL and the side of the pressure-sensitive adhesive layer 60 near the display panel DP. i∈{1,2,3,4,5,n is a natural number}, 1 indicates that the corresponding film layer is the pressure-sensitive adhesive layer 60, 2 indicates that the corresponding film layer is the waveplate layer 50, 3 indicates that the corresponding film layer is the polarizing substrate layer 30, 4 indicates that the corresponding film layer is the adhesive layer 20, and 5 indicates that the corresponding film layer is the first functional layer 10.

[0056] Specifically,

[0057] Wherein, E1 is the elastic modulus of the pressure-sensitive adhesive layer 60, T1 is the thickness of the pressure-sensitive adhesive layer 60, and Y1 is the distance between the center surface of the pressure-sensitive adhesive layer 60 and the side of the pressure-sensitive adhesive layer 60 near the display panel DP.

[0058] E2 is the elastic modulus of waveplate layer 50, and T2 is the thickness of waveplate layer 50. Figure 3 As shown, Y2 is the distance between the center surface of the waveplate layer 50 and the side of the pressure-sensitive adhesive layer 60 near the display panel DP;

[0059] E3 is the elastic modulus of the polarizing substrate layer 30, and T3 is the thickness of the polarizing substrate layer 30. Figure 3 As shown, Y3 is the distance between the center surface of the polarizing substrate layer 30 and the side of the pressure-sensitive adhesive layer 60 near the display panel DP;

[0060] E4 is the elastic modulus of adhesive layer 20, T4 is the thickness of adhesive layer 20, and Y4 is the distance between the center surface of adhesive layer 20 and the side of pressure-sensitive adhesive layer 60 near the display panel DP.

[0061] E5 is the elastic modulus of the first functional layer 10, T5 is the thickness of the first functional layer 10, and Y5 is the distance between the center surface of the first functional layer 10 and the side of the pressure-sensitive adhesive layer 60 near the display panel DP.

[0062] It should be noted that the central plane is a plane formed at the center position in the thickness direction of the film layer, and the thickness of the film layer on both sides of the central plane is equal.

[0063] Understandably, by setting the calculation formula for the neutral layer CL, after determining the above film layers, the relative positions of the polarizing substrate layer 30 and the neutral layer CL can be further adjusted. The material (elastic modulus) and thickness of each film layer can be adjusted according to the actual situation, so that the curvature of the polarizing film POL layer matches the curvature direction of the four-curved display panel.

[0064] In one embodiment, the first functional layer 10 is a polarizer POL substrate protective layer, the material of the first functional layer 10 includes cellulose triacetate, and the thickness of the first functional layer 10 is 20-40 μm.

[0065] It is understandable that by setting the first functional layer 10, which is made of cellulose triacetate and has a suitable elastic modulus, and further controlling the thickness of the first functional layer 10 to be between 20 and 40 μm (specifically 20 μm, 22 μm, 24 μm, 28 μm, 30 μm, 32 μm, 34 μm, 40 μm, etc.), the polarizing substrate layer 30 can be kept below the neutral layer CL. This allows the polarizer POL to shrink and deform towards the display panel DP after being affected by temperature, so that the bending direction of the polarizer POL is the same as the bending direction of the four-curved display panel. This reduces the tensile stress of the glass cover of the display panel DP on the polarizer POL film layer during subsequent bonding and high-temperature reliability conditions, thus reducing the risk of film layer breakage under high-temperature reliability conditions.

[0066] In one embodiment, the waveplate layer 50 is made of a liquid crystal quarter-wave plate, and the thickness of the waveplate layer 50 is 3-7 μm.

[0067] It is understandable that by adjusting the material of the waveplate layer 50, replacing the original film material system quarter-waveplate layer 50 with a liquid crystal coating system quarter-waveplate, and controlling the thickness of the waveplate layer 50 to be 3-7 μm, specifically 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, etc., the polarizing substrate layer 30 can be kept below the neutral layer CL. This allows the polarizer POL to shrink and deform towards the display panel DP after being affected by temperature, so that the bending direction of the polarizer POL is the same as the bending direction of the four-curved display panel. In subsequent bonding and high-temperature conditions, this can reduce the tensile stress of the glass cover of the display panel DP on the polarizer POL film layer, and reduce the risk of film layer breakage under high-temperature conditions.

[0068] In one embodiment, a second functional layer 40 is provided on the side of the first functional layer 10 opposite to the polarizer POL substrate layer, and the second functional layer 40 includes one of a hardened coating, an anti-reflective coating, or an anti-fingerprint coating.

[0069] Specifically, the second functional layer 40 includes a hard coating (HC), an anti-reflection coating (AR), or an anti-fingerprint coating (AF), which can be selected according to actual production needs to achieve different effects and functions.

[0070] It should be noted that when the second functional layer 40 is a hardened coating, the bending curvature of the display panel DP cannot be too large. When the bending curvature of the display panel DP is too large, the hardened coating is thin and has high hardness. Although it has a certain degree of bendability, when the bending curvature approaches the critical value, the polarizer POL will undergo a change due to high temperature, which will also cause the hardened coating to crack and affect the display effect of the display module.

[0071] Understandably, by setting up a second functional layer 40, it is possible to achieve basic polarization effects while providing more operability, richer effects, and improving the performance or production yield of the display module.

[0072] In one embodiment, such as Figure 5 As shown, the second functional layer 40 is a hardened coating, and the material of the hardened coating includes optical adhesive, specifically ultraviolet curable adhesive.

[0073] Understandably, by setting the second functional layer 40 as a hardened layer, the production yield of the polarizer POL is greatly improved, and it can also adapt to the display panel DP with a certain bending angle, thereby improving production efficiency. It can also further thin the first functional layer 10, achieving the effect of further thinning the polarizer POL and thus further thinning the display module.

[0074] In one embodiment, such as Figure 6 and Figure 7 As shown, the display panel DP includes a flat display area A and a curved display area B adjacent to the flat display area A;

[0075] Specifically, the curved display area B corresponds to the side position of the four-curved display screen. The curved display area B can partially surround the flat display area A, or it can completely surround the flat display area A.

[0076] The thickness of the polarizing substrate layer 30 located in the planar display area A is greater than the thickness of the polarizing substrate layer 30 located in the bent display area B.

[0077] It is understandable that the polarizing substrate layer 30 has different thicknesses in different regions, which makes the degree of deformation of the polarizing substrate layer 30 different under high temperature conditions. The deformation position of the polarizer POL is more in line with the structure of the four-curved display panel, so that the display panel DP can support part of the stress generated by the deformation of the polarizer POL, relieve the internal stress between the internal film layers of the polarizer POL, and prevent the film layers in the bending area of ​​the display module from cracking and affecting the display effect.

[0078] In one embodiment, the thickness of the polarizing substrate layer 30 located in the bent display area B gradually decreases in the direction away from the planar display area A.

[0079] Understandably, by setting the portion of the polarizing substrate layer 30 located in the bent display area B to a structure where the thickness gradually decreases near the edge, the edge transition formed after the polarizer POL deforms is smoother, reducing the stress between the internal film layers of the polarizer POL after the polarizer POL deforms.

[0080] In one embodiment, the bent display area B includes a plurality of side bent display areas B1 and corner bent display areas B2 located around the periphery of the planar display area A, and a corner bent display area B2 is provided between any two adjacent side bent display areas B1.

[0081] The thickness of the polarizing substrate layer 30 in the corner-bent display area B2 is less than the thickness of the polarizing substrate layer 30 in the side-bent display area B1.

[0082] Specifically, such as Figure 8As shown, taking a four-curved display screen as an example, the display panel DP has two mutually perpendicular bending directions, and the bending directions of the opposite pair of sides are the same. The position of the corner bending display area B2 is the intersection of the two bending directions, and the bending degree of the display panel DP in this area is greater. In order to match the polarizer POL in this area with the display panel DP, the thickness of the polarizer substrate layer 30 in the corner bending display area B2 is less than the thickness of the polarizer substrate layer 30 in the side bending display area B1. This makes the polarizer substrate layer 30 deform differently under high temperature conditions, and the deformation position of the polarizer POL is more in line with the different curvatures of different positions of the four-curved display panel. The display panel DP can also support part of the stress generated by the deformation of the polarizer POL, alleviate the internal stress between the film layers inside the polarizer POL, and prevent the film layers in the bending display area B of the display module from cracking and affecting the display effect.

[0083] Specifically, the thickness variation of the polarizing substrate layer 30 in the area connecting the side-bent display area B1 and the corner-bent display area B2 is continuous.

[0084] It is understandable that the corner bending display area B2 has a larger curvature than the side bending display area. Therefore, the thickness of the polarizing substrate layer 30 in the corner bending display area B2 is set to be less than the thickness of the polarizing substrate layer 30 in the side bending display area B1. This results in different degrees of deformation of the polarizing substrate layer 30 under high temperature conditions. The deformation position of the polarizer POL is more in line with the different curvatures of different positions on the four-curved display panel. The display panel DP can also support part of the stress generated by the deformation of the polarizer POL, alleviate the internal stress between the film layers inside the polarizer POL, and prevent the film layers in the bending display area B of the display module from cracking and affecting the display effect.

[0085] This application also provides a mobile terminal, including the display module and terminal body described in any of the above embodiments, wherein the terminal body and the display module are integrated into one unit.

[0086] This application places the polarizer POL on the light-emitting side of the display panel DP, and places the polarizing substrate layer 30, which is susceptible to deformation due to temperature, on the side of the neutral layer CL of the polarizer POL close to the pressure-sensitive adhesive layer 60. This causes the polarizer POL to shrink and deform towards the display panel DP after being affected by temperature, so that the bending direction of the polarizer POL is the same as the bending direction of the four-curved display panel. This reduces the tensile stress of the glass cover of the display panel DP on the polarizer POL film layer under subsequent bonding and high-temperature conditions, and reduces the risk of film layer breakage under high-temperature conditions.

[0087] The above provides a detailed description of a display panel, a method for manufacturing the display panel, and a mobile terminal 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, characterized in that, include: Display panel; as well as A polarizer is disposed on the light-emitting side of the display panel. The polarizer includes a neutral layer and includes a pressure-sensitive adhesive layer, a waveplate layer, a polarizing substrate layer, an adhesive layer and a first functional layer disposed sequentially on the light-emitting side of the display panel. The polarizing substrate layer is located on the side of the neutral layer in the polarizer that is close to the pressure-sensitive adhesive layer, and the neutral layer is a film layer that is neither subjected to tension nor pressure. The polarizer's deformation and bending direction is the same as the bending direction of the display panel; The polarizing substrate layer is the polarizing film layer in the polarizer.

2. The display module as described in claim 1, characterized in that, The polarizer is attached to the display panel.

3. The display module as described in claim 1, characterized in that, The first functional layer is the polarizer substrate protective layer.

4. The display module as described in claim 1, characterized in that, The thickness of the first functional layer is 20~40um.

5. The display module as described in claim 1, characterized in that, The waveplate layer is made of a liquid crystal quarter-wave plate, and the thickness of the waveplate layer is 3~7 μm.

6. The display module as described in claim 5, characterized in that, The thickness of the waveplate layer is 3 μm.

7. The display module as described in claim 1, characterized in that, A second functional layer is provided on the side of the first functional layer opposite to the polarizing substrate layer. The second functional layer includes one of a hardened coating, an anti-reflective coating, or an anti-fingerprint coating.

8. The display module as described in claim 7, characterized in that, When the bending curvature of the display panel is less than a critical value, the second functional layer is a hardened coating.

9. The display module as described in claim 1, characterized in that, The display panel includes a flat display area and a curved display area adjacent to the flat display area; The thickness of the polarizing substrate layer located in the planar display area is greater than the thickness of the polarizing substrate layer located in the bent display area.

10. The display module as described in claim 9, characterized in that, In the direction away from the planar display area, the thickness of the polarizing substrate layer located in the bent display area gradually decreases.

11. The display module as described in claim 9, characterized in that, The bending display area includes a plurality of side bending display areas and corner bending display areas located around the periphery of the planar display area, and a corner bending display area is provided between any two adjacent side bending display areas; The thickness of the polarizing substrate layer in the corner-bent display area is less than the thickness of the polarizing substrate layer in the side-bent display area.

12. The display module as described in any one of claims 9 to 11, characterized in that, The polarizer is attached to different positions of the display panel with different curvatures.

13. A mobile terminal, characterized in that, It includes the display module and terminal body as described in any one of claims 1 to 12, wherein the terminal body and the display module are combined into one unit.

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