Display module and display device

Abstract

The application discloses a display module and a display device. The display module comprises a display panel, a polarizer and a stress control layer. The polarizer is arranged on the light-emitting side of the display panel, and the stress control layer is arranged on the side of the display panel away from the polarizer. The material of the stress control layer comprises a temperature-sensitive material, and the stress control layer is configured to generate a shrinkage stress opposite to the shrinkage stress of the polarizer when heated. By arranging the stress control layer on the side of the display panel away from the polarizer, the shrinkage stress of the stress control layer and the shrinkage stress of the polarizer are opposite to each other under the condition of heating, so that the shrinkage stress of the display panel on the two sides can be at least partially offset, thereby improving the warping effect of the display module.

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] To meet the demand for thinner and lighter organic light-emitting diode (OLED) display modules, the thinning of the color filter (CF) substrate and thin film transistor (TFF) of the display panel has gradually become the mainstream. However, at the same time, due to the thinning of the panel substrate, it cannot resist the shrinkage stress of the polarizer (POL) after being heated. Under certain temperature conditions, the POL is prone to pulling up the panel substrate, which eventually causes the panel to "warp" at a certain temperature, resulting in problems such as display abnormalities and reduced reliability. Utility Model Content

[0003] This application provides a display module and display device to improve the warping problem of the display module.

[0004] To achieve the above objectives, this application provides a display module, the display module comprising:

[0005] Display panel;

[0006] A polarizer is disposed on the light-emitting side of the display panel;

[0007] A stress control layer is disposed on the side of the display panel away from the polarizer;

[0008] The stress control layer is made of a temperature-sensitive material and is configured to generate shrinkage stress that counteracts the shrinkage stress of the polarizer when heated.

[0009] In some embodiments, the stress control layer includes a first temperature-sensitive layer, the material of which includes the temperature-sensitive material, and the temperature-sensitive material includes at least one of polyvinyl alcohol, polyolefin, and polyester that have heat shrinkage properties.

[0010] In some embodiments, the polarizer includes a second temperature-sensitive layer, and the absolute value of the difference between the thickness of the first temperature-sensitive layer and the thickness of the second temperature-sensitive layer ranges from 0 μm to 5 μm.

[0011] In some embodiments, the second temperature-sensitive layer includes a first sub-temperature-sensitive layer;

[0012] Alternatively, the second temperature-sensitive layer may include a first sub-temperature-sensitive layer and a second sub-temperature-sensitive layer;

[0013] The first sub-temperature sensitive layer includes a polarization layer, and the second sub-temperature sensitive layer includes a phase difference layer.

[0014] In some embodiments, the thickness of the first temperature-sensitive layer is equal to the thickness of the second temperature-sensitive layer.

[0015] In some embodiments, the second temperature-sensitive layer includes a first side and a second side, the first side intersects the second side, and the length of the first side is greater than the length of the second side;

[0016] The first temperature-sensitive layer includes a third side corresponding to the first side and a fourth side corresponding to the second side, wherein the third side intersects the fourth side and the length of the third side is greater than the length of the fourth side;

[0017] The absolute value of the difference between the shrinkage rate S3 of the third side and the shrinkage rate S1 of the first side is in the range of 0 to 0.1S1, and the absolute value of the difference between the shrinkage rate S4 of the fourth side and the shrinkage rate S2 of the second side is in the range of 0 to 0.1S2.

[0018] In some embodiments, the shrinkage rate S3 of the third side is equal to the shrinkage rate S1 of the first side, and the shrinkage rate S4 of the fourth side is equal to the shrinkage rate S2 of the second side.

[0019] In some embodiments, the shrinkage rate S1 of the first side ranges from 0.10% to 0.25%, and the shrinkage rate S2 of the second side ranges from 0.20% to 0.50%.

[0020] The shrinkage rate S3 of the third side ranges from 0.10% to 0.25%, and the shrinkage rate S4 of the fourth side ranges from 0.20% to 0.50%.

[0021] In some embodiments, the stress control layer further includes a first adhesive layer and a first protective layer, wherein the first adhesive layer is disposed on the side of the first temperature-sensitive layer close to the display panel, and the first protective layer is disposed on the side of the first temperature-sensitive layer away from the display panel;

[0022] The polarizer further includes a second adhesive layer and a second protective layer. The second adhesive layer is disposed on the side of the second temperature-sensitive layer close to the display panel, and the second protective layer is disposed on the side of the second temperature-sensitive layer away from the display panel.

[0023] Wherein, the thickness of the first adhesive layer is equal to the thickness of the second adhesive layer, and the thickness of the first protective layer is equal to the thickness of the second protective layer.

[0024] This application also provides a display device, which includes the display module described above.

[0025] This application provides a display module and a display device. The display module of this application provides a stress control layer on the side of the display panel away from the polarizer. The stress control layer is made of a temperature-sensitive material and generates shrinkage stress under heating conditions. Since the stress control layer and the polarizer are located on opposite sides of the display panel, and the stress control layer can generate shrinkage stress that is opposite to the shrinkage stress of the polarizer when heated, the shrinkage stress on opposite sides of the display panel can be at least partially offset, thereby achieving the effect of improving the warping of the display module. Attached Figure Description

[0026] 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.

[0027] 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.

[0028] Figure 1 This is a schematic diagram of the structure of a display module in the prior art;

[0029] Figure 2 This is a schematic diagram illustrating a "bowl warping" phenomenon in a display module in the prior art;

[0030] Figure 3 This is a schematic diagram of the structure of a display module provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of another display module provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram illustrating a display module exhibiting "turtle curl" according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of a stress control layer for a display module provided in an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the structure of a polarizer for a display module provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of the structure of a polarizer for another display module provided in an embodiment of this application;

[0036] Figure 9 This is a top view of the second temperature-sensitive layer of a display module provided in an embodiment of this application;

[0037] Figure 10 This is a top view of the first temperature-sensitive layer of a display module provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Display module; 100. Display panel; 110. Array substrate; 120. Light-emitting device layer; 130. Color filter substrate; 140. Optical adhesive layer; 200. Polarizer; 201. First side; 202. Second side; 210. Second temperature-sensitive layer; 211. First sub-temperature-sensitive layer; 212. Second sub-temperature-sensitive layer; 220. Second adhesive layer; 230. Second protective layer; 300. Stress control layer; 301. Third side; 302. Fourth side; 310. First temperature-sensitive layer; 320. First adhesive layer; 330. First protective layer; 400. Support and buffer layer. Detailed Implementation

[0040] 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.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a display module in the prior art; Figure 2 This is a schematic diagram illustrating the "bowl warping" that occurs in existing display modules under heated conditions. Existing OLED display modules typically include a display panel 100 and a polarizer 200 located on the light-emitting side of the display panel 100. Because the polarizer 200 contains temperature-sensitive materials, it is prone to shrinkage when heated, generating shrinkage stress. The thin substrate of the display panel 100 cannot withstand this shrinkage stress, ultimately causing the display panel 100 and the polarizer 200 to "bowl warp." This "bowl warping" refers to the overall bending deformation of the display module, resembling a bowl, which leads to problems such as display abnormalities and reduced reliability.

[0042] To address the aforementioned problems, this application provides a display module 10, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the structure of a display module 10 provided in this application. The display module 10 of this application includes a display panel 100, a polarizer 200, and a stress control layer 300; the polarizer 200 is disposed on the light-emitting side of the display panel 100; the stress control layer 300 is disposed on the side of the display panel 100 away from the polarizer 200; wherein, the material of the stress control layer 300 includes a temperature-sensitive material, and the stress control layer 300 is configured to generate shrinkage stress that resists the shrinkage stress of the polarizer 200 when heated.

[0043] In this application, the display panel 100 may be an OLED display panel. Please refer to... Figure 4 The display panel 100 includes an array substrate 110 and a light-emitting device layer 120. The array substrate 110 includes a substrate and a driving circuit layer disposed on the substrate. The light-emitting device layer 120 includes multiple light-emitting devices, each including an anode, an organic functional layer, and a cathode. The organic functional layer is disposed on the side of the anode away from the array substrate 110 and includes an organic light-emitting layer. The organic functional layer may also include at least one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The cathode is disposed on the side of the organic functional layer away from the anode. Specifically, the structure of the display panel 100 can be referenced from the prior art, and this application does not limit it.

[0044] For further details, please refer to Figure 4 The display panel 100 may also include a color filter substrate 130, which is disposed on the side of the light-emitting device layer 120 away from the array substrate 110. The color filter substrate 130 can be bonded to the light-emitting device layer 120 by an optical adhesive layer 140.

[0045] Please refer to the following in this application: Figures 3-4 A polarizer 200 is disposed on the light-emitting side of the display panel 100 to enhance the optical performance of the display module 10. The polarizer 200 is typically composed of multiple stacked film layers, some of which are temperature-sensitive layers, i.e., layers with temperature-sensitive properties. These temperature-sensitive layers are usually formed of temperature-sensitive materials, which are prone to shrinkage when heated, causing shrinkage stress (along a plane parallel to the light-emitting surface of the display panel 100) to occur. When the polarizer 200 is attached to the light-emitting side of the display panel 100, the shrinkage stress of the polarizer 200 causes the display panel 100 to "warp" along with the polarizer 200. Figure 2 As shown, the edges of the display panel 100 and the polarizer 200 are warped toward the first direction Z, where the first direction Z is the direction from the display panel 100 to the polarizer 200.

[0046] The stress control layer 300 is disposed on the back side of the display panel 100 (i.e., the side of the display panel 100 away from the light-emitting side). The material of the stress control layer 300 includes a temperature-sensitive material, therefore it is prone to shrinkage under heat, generating shrinkage stress (along a plane parallel to the back side of the display panel 100). When the stress control layer 300 is attached to the back side of the display panel 100, under the action of the shrinkage stress of the stress control layer 300, the display panel 100 and the stress control layer 300 as a whole "warp," such as... Figure 5 As shown, the edges of the display panel 100 and the stress control layer 300 are warped in the opposite direction to the first direction Z.

[0047] In this application, the stress control layer 300 is disposed on the side of the display panel 100 away from the polarizer 200. Since the shrinkage stress generated by the stress control layer 300 when heated is opposite to the shrinkage stress generated by the polarizer 200 when heated, the shrinkage stress of the stress control layer 300 and the shrinkage stress of the polarizer 200 can at least partially cancel each other out. For example, when the shrinkage stress of the stress control layer 300 is close to (but not equal to) the shrinkage stress of the polarizer 200, it can partially cancel out the shrinkage stress of the polarizer 200 to reduce the warping of the display module; when the shrinkage stress of the stress control layer 300 is equal to the shrinkage stress of the polarizer 200, it can completely cancel out the shrinkage stress of the polarizer 200 to avoid the warping of the display module.

[0048] Specifically, the polarizer 200 and the stress control layer 300 are located on opposite sides of the display panel 100 in the first direction Z. The shrinkage stress generated by the polarizer 200 when heated is mainly along the plane direction parallel to the light-emitting surface of the display panel 100. The shrinkage stress of the polarizer 200 is transmitted to the display panel 100, forming a torque along the first direction Z. The shrinkage stress generated by the stress control layer 300 when heated is also along the plane direction parallel to the back of the display panel 100. The shrinkage stress of the stress control layer 300 is transmitted to the display panel 100, forming a torque in the opposite direction along the first direction Z. Therefore, the two opposing torques can cancel each other out, achieving overall torque balance, thereby improving the warping problem of the display module 10.

[0049] In some embodiments, please refer to Figure 6 The stress control layer 300 includes a first temperature-sensitive layer 310, the material of which includes a temperature-sensitive material. The temperature-sensitive material includes at least one of polyvinyl alcohol (PVA), polyolefin, and polyester, which have heat-shrinkability. The polyolefin may be a multilayer co-extruded polyolefin heat-shrinkable film (POF), and the polyester may be polyethylene terephthalate-1,4-cyclohexanediol ester (PETG), but is not limited thereto.

[0050] In a preferred embodiment, the material of the first temperature-sensitive layer 310 is polyvinyl alcohol (PVA). When the material of the first temperature-sensitive layer 310 is PVA, it is the same as the material of the polarizing layer in the polarizer 200, and has the same thermal shrinkage performance. This is beneficial to ensure that the shrinkage stress of the stress control layer 300 is equivalent to or the same as the shrinkage stress of the polarizer 200. For example, the magnitude and / or direction of the shrinkage stress are equivalent to or the same, thereby achieving the cancellation of the shrinkage stress of the stress control layer 300 and the shrinkage stress of the polarizer 200, and ensuring the flatness of the display module 10.

[0051] In some embodiments, please refer to Figure 7 The polarizer 200 includes a second temperature-sensitive layer 210, which is made of a temperature-sensitive material, such as polyvinyl alcohol (PVA). The absolute value of the difference between the thickness of the first temperature-sensitive layer 310 and the thickness of the second temperature-sensitive layer 210 ranges from 0 μm to 5 μm. Considering the existence of process errors, the thickness of the first temperature-sensitive layer 310 can be slightly larger or slightly smaller than the thickness of the second temperature-sensitive layer 210, with the thickness difference ranging from 0 μm to 5 μm. For example, the thickness difference can be 0 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, or 5 μm, but is not limited to these values. The specific value can be determined based on process conditions and module structure.

[0052] In a preferred embodiment, the thickness of the first temperature-sensitive layer 310 is equal to the thickness of the second temperature-sensitive layer 210, so as to ensure that the thermal shrinkage performance of the first temperature-sensitive layer 310 is the same as that of the second temperature-sensitive layer 210, so that the shrinkage stress of the polarizer 200 is the same as that of the stress control layer 300, thereby achieving the effect of offsetting the thermal shrinkage stress on opposite sides of the display panel 100, and further ensuring the flatness of the display module 10.

[0053] Please refer to the following in this application: Figures 7-8 The second temperature-sensitive layer 210 may include one or more film layers. When multiple film layers are included, the materials of different film layers may be the same or different, but the material of each film layer is a temperature-sensitive material.

[0054] In some embodiments, please refer to Figure 7 The second temperature-sensitive layer 210 includes a first sub-temperature-sensitive layer 211, which may be a polarizing layer. The polarizing layer may be made of polyvinyl alcohol (PVA), but is not limited to this.

[0055] In this embodiment, when the second temperature-sensitive layer 210 includes only a polarizing layer, the thickness of the first temperature-sensitive layer 310 can be equal to the thickness of the second temperature-sensitive layer 210, that is, the thickness of the first temperature-sensitive layer 310 is equal to the thickness of the polarizing layer. Furthermore, the material of the first temperature-sensitive layer 310 can be the same as the material of the polarizing layer, both being polyvinyl alcohol (PVA), to ensure that the magnitude and direction of the shrinkage stress of the first temperature-sensitive layer 310 and the second temperature-sensitive layer 210 are the same, thereby ensuring that the magnitude and direction of the shrinkage stress of the stress control layer 300 and the polarizer 200 are the same, and ensuring the flatness of the display module 10.

[0056] In some embodiments, please refer to Figure 8 The second temperature-sensitive layer 210 may include a first sub-temperature-sensitive layer 211 and a second sub-temperature-sensitive layer 212; wherein, the first sub-temperature-sensitive layer 211 may be a polarizing layer, and the second sub-temperature-sensitive layer 212 may be a phase retardation layer. Specifically, the second sub-temperature-sensitive layer 212 may be located on the side of the first sub-temperature-sensitive layer 211 closer to the display panel 100, the material of the polarizing layer may be polyvinyl alcohol (PVA), and the material of the phase retardation layer may be a phase retardation film material with temperature-sensitive characteristics commonly used in the art, such as the phase retardation film ND film produced by Nitto Chemical Corporation, but is not limited thereto.

[0057] In this embodiment, the thickness of the first temperature-sensitive layer 310 can be equal to the thickness of the second temperature-sensitive layer 210, that is, the thickness of the first temperature-sensitive layer 310 is equal to the sum of the thicknesses of the first sub-temperature-sensitive layer 211 and the second sub-temperature-sensitive layer 212.

[0058] It is understood that the second temperature-sensitive layer 210 may also include a third sub-temperature-sensitive layer, a fourth sub-temperature-sensitive layer, or more sub-temperature-sensitive layers. This application does not impose any restrictions. The materials of these sub-temperature-sensitive layers are all temperature-sensitive materials. Correspondingly, the thickness of the first temperature-sensitive layer 310 may be equal to the sum of the thicknesses of these sub-temperature-sensitive layers.

[0059] In some embodiments, please refer to Figure 9The second temperature-sensitive layer 210 includes a first side 201 and a second side 202, which intersect, and the length of the first side 201 is greater than the length of the second side 202. For example, the second temperature-sensitive layer 210 can be rectangular, with the first side 201 being the longer side and the second side 202 being the shorter side. The shrinkage rate S1 of the first side 201 ranges from 0.10% to 0.25%, for example, S1 can be 0.10%, 0.15%, 0.20%, 0.25%, etc.; the shrinkage rate S2 of the second side 202 ranges from 0.20% to 0.50%, for example, S2 can be 0.20%, 0.25%, 0.30%, 0.35%, 0.40%, 0.45%, 0.50%, etc.

[0060] For further details, please refer to Figure 10 The first temperature-sensitive layer 310 includes a third side 301 corresponding to the first side 201 and a fourth side 302 corresponding to the second side 202. The third side 301 and the fourth side 302 intersect, and the length of the third side 301 is greater than the length of the fourth side 302. For example, the first temperature-sensitive layer 310 can be rectangular, with the third side 301 being the long side and the fourth side 302 being the short side. The shrinkage rate S3 of the third side 301 ranges from 0.10% to 0.25%, for example, S3 can be 0.10%, 0.15%, 0.20%, 0.25%, etc.; the shrinkage rate S4 of the fourth side 302 ranges from 0.20% to 0.50%, for example, S4 can be 0.20%, 0.25%, 0.30%, 0.35%, 0.40%, 0.45%, 0.50%, etc.

[0061] In this embodiment, setting the shrinkage rate of each side of the second temperature-sensitive layer 210 within the aforementioned range can prevent excessive shrinkage of the polarizer 200 from affecting its flatness and reliability, and can also prevent the polarization effect from being affected by an excessively small shrinkage rate of the polarizer 200. The shrinkage rate range of each side of the first temperature-sensitive layer 310 is the same as the shrinkage rate range of the corresponding side of its second temperature-sensitive layer 210, so as to ensure that the first temperature-sensitive layer 310 and the second temperature-sensitive layer 210 have similar or the same thermal shrinkage performance.

[0062] In some embodiments, the absolute value of the difference between the shrinkage rate S3 of the third side 301 and the shrinkage rate S1 of the first side 201 ranges from 0 to 0.1S1, that is, |S3-S1| is less than or equal to 10% of the shrinkage rate S1 of the first side 201; the absolute value of the difference between the shrinkage rate S4 of the fourth side 302 and the shrinkage rate S2 of the second side 202 ranges from 0 to 0.1S2, that is, |S4-S2| is less than or equal to 10% of the shrinkage rate S2 of the second side 202. In this embodiment, considering the existence of process errors, the shrinkage rate S3 of the third side 301 can be slightly greater than or slightly less than the shrinkage rate S1 of the first side 201, and the difference between the two shrinkage rates can range from 0 to 0.1S1. For example, the difference between the two shrinkage rates can be 0, 0.02S1, 0.04S1, 0.06S1, 0.08S1, 0.1S1, etc.; the shrinkage rate S4 of the fourth side 302 can be slightly greater than or slightly less than the shrinkage rate S2 of the second side 202, and the difference between the two shrinkage rates can range from 0 to 0.1S2. For example, the difference between the two shrinkage rates can be 0, 0.02S2, 0.04S2, 0.06S2, 0.08S2, 0.1S2, etc., but is not limited to this. The specific value can be determined according to the process conditions and module structure.

[0063] In a preferred embodiment, the shrinkage rate S3 of the third side 301 is equal to the shrinkage rate S1 of the first side 201, and the shrinkage rate S4 of the fourth side 302 is equal to the shrinkage rate S2 of the second side 202. This ensures that the thermal shrinkage performance of the first temperature-sensitive layer 310 is the same as that of the second temperature-sensitive layer 210, making the shrinkage stress of the polarizer 200 the same as that of the stress control layer 300. This achieves the effect of canceling out the thermal shrinkage stress on opposite sides of the display panel 100, further ensuring the flatness of the display module 10.

[0064] In some embodiments, please refer to Figure 6 The stress control layer 300 further includes a first adhesive layer 320 and a first protective layer 330; the first adhesive layer 320 is disposed on the side of the first temperature sensitive layer 310 close to the display panel 100, and is used to bond the first temperature sensitive layer 310 and the display panel 100; the first protective layer 330 is disposed on the side of the first temperature sensitive layer 310 away from the display panel 100, and is used to protect the first temperature sensitive layer 310; wherein, the material of the first adhesive layer 320 may be pressure-sensitive adhesive (PSA), and the material of the first protective layer 330 may be triacetate cellulose film (TAC), but is not limited thereto.

[0065] Please refer to Figure 8The polarizer 200 also includes a second adhesive layer 220 and a second protective layer 230; the second adhesive layer 220 is disposed on the side of the second temperature-sensitive layer 210 close to the display panel 100, and is used to bond the second temperature-sensitive layer 210 and the display panel 100; the second protective layer 230 is disposed on the side of the second temperature-sensitive layer 210 away from the display panel 100, and is used to protect the second temperature-sensitive layer 210; wherein, the material of the second adhesive layer 220 may be pressure-sensitive adhesive (PSA), and the material of the second protective layer 230 may be triacetate cellulose film (TAC), but is not limited thereto.

[0066] To ensure that the thermal shrinkage stress of the film layers on both sides of the display panel 100 is comparable or the same, the thickness of the first adhesive layer 320 is similar to or the same as the thickness of the second adhesive layer 220, and the thickness of the first protective layer 330 is similar to or the same as the thickness of the second protective layer 230. Furthermore, the material of the first adhesive layer 320 can be the same as the material of the second adhesive layer 220, and the material of the first protective layer 330 can be the same as the material of the second protective layer 230.

[0067] In a preferred embodiment, the thickness of the first adhesive layer 320 is equal to the thickness of the second adhesive layer 220, and the thickness of the first protective layer 330 is equal to the thickness of the second protective layer 230, so as to ensure that the overall thickness of the stress control layer 300 is the same as the overall thickness of the polarizer 200, thereby ensuring that the thermal shrinkage stress on opposite sides of the display panel 100 is the same, and avoiding warping of the display module 10.

[0068] For example, in one example, the polarizer 200 has a thickness of 104 μm, wherein the second temperature-sensitive layer 210 has a thickness of 46 μm, the second protective layer 230 has a thickness of 33 μm, and the second adhesive layer 220 has a thickness of 25 μm, wherein the second temperature-sensitive layer 210 includes a polarizing layer and a phase difference layer; then the stress control layer 300 has a thickness of 104 μm, wherein the first temperature-sensitive layer 310 has a thickness of 46 μm, the first protective layer 330 has a thickness of 33 μm, and the first adhesive layer 320 has a thickness of 25 μm.

[0069] In some embodiments, please refer to Figure 4 The display module 10 may also include other commonly used functional layers in the art, such as a support and buffer layer 400, which is disposed on the side of the stress control layer 300 away from the display panel 100. The material of the support and buffer layer 400 may be super clean foam (SCF), but is not limited thereto.

[0070] This application also provides a display device, which includes the display module described above. The display device includes, but is not limited to, mobile phones, tablets, televisions, smart display products, and automotive display products.

[0071] This application provides a display module and a display device. The display module of this application provides a stress control layer on the side of the display panel away from the polarizer. The stress control layer is made of a temperature-sensitive material and generates shrinkage stress under heating conditions. Since the stress control layer and the polarizer are located on opposite sides of the display panel, and the stress control layer can generate shrinkage stress that is opposite to the shrinkage stress of the polarizer when heated, the shrinkage stress on opposite sides of the display panel can be at least partially offset, thereby achieving the effect of improving the warping of the display module.

[0072] 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.

[0073] 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.

[0074] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0075] 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 polarizer is disposed on the light-emitting side of the display panel; A stress control layer is disposed on the side of the display panel away from the polarizer; The stress control layer is made of a temperature-sensitive material and is configured to generate shrinkage stress that counteracts the shrinkage stress of the polarizer when heated.

2. The display module of claim 1, wherein, The stress control layer includes a first temperature-sensitive layer, the material of which includes the temperature-sensitive material, which is polyvinyl alcohol, polyolefin, or polyester with heat shrinkage properties.

3. The display module of claim 2, wherein, The polarizer includes a second temperature-sensitive layer, and the absolute value of the difference between the thickness of the first temperature-sensitive layer and the thickness of the second temperature-sensitive layer ranges from 0 μm to 5 μm.

4. The display module of claim 3, wherein, The second temperature-sensitive layer includes a first sub-temperature-sensitive layer; Alternatively, the second temperature-sensitive layer may include a first sub-temperature-sensitive layer and a second sub-temperature-sensitive layer; The first sub-temperature sensitive layer includes a polarization layer, and the second sub-temperature sensitive layer includes a phase difference layer.

5. The display module of claim 3 or 4, wherein, The thickness of the first temperature-sensitive layer is equal to the thickness of the second temperature-sensitive layer.

6. The display module of claim 3, wherein, The second temperature-sensitive layer includes a first side and a second side, the first side intersects the second side, and the length of the first side is greater than the length of the second side; The first temperature-sensitive layer includes a third side corresponding to the first side and a fourth side corresponding to the second side, wherein the third side intersects the fourth side and the length of the third side is greater than the length of the fourth side; The absolute value of the difference between the shrinkage rate S3 of the third side and the shrinkage rate S1 of the first side is in the range of 0 to 0.1S1, and the absolute value of the difference between the shrinkage rate S4 of the fourth side and the shrinkage rate S2 of the second side is in the range of 0 to 0.1S2.

7. The display module of claim 6, wherein, The shrinkage rate S3 of the third side is equal to the shrinkage rate S1 of the first side, and the shrinkage rate S4 of the fourth side is equal to the shrinkage rate S2 of the second side.

8. The display module of claim 6 or 7, wherein, The shrinkage rate S1 of the first side ranges from 0.10% to 0.25%, and the shrinkage rate S2 of the second side ranges from 0.20% to 0.50%. The shrinkage rate S3 of the third side ranges from 0.10% to 0.25%, and the shrinkage rate S4 of the fourth side ranges from 0.20% to 0.50%.

9. The display module of claim 3, wherein, The stress control layer further includes a first adhesive layer and a first protective layer. The first adhesive layer is disposed on the side of the first temperature sensitive layer close to the display panel, and the first protective layer is disposed on the side of the first temperature sensitive layer away from the display panel. The polarizer further includes a second adhesive layer and a second protective layer. The second adhesive layer is disposed on the side of the second temperature-sensitive layer close to the display panel, and the second protective layer is disposed on the side of the second temperature-sensitive layer away from the display panel. Wherein, the thickness of the first adhesive layer is equal to the thickness of the second adhesive layer, and the thickness of the first protective layer is equal to the thickness of the second protective layer.

10. A display device, characterized by comprising: Includes the display module as described in any one of claims 1 to 9.

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