Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a display panel, the display panel comprising a first display part, a second display part and a bending part; a support structure, the support structure being located on the backlight side of the display panel, the support structure having a first through slot, the first through slot penetrating the support structure along a first direction, the first through slot being arranged corresponding to the bending part, and the opening of the first through slot facing away from the display panel; and a buffer structure, at least part of the buffer structure being located on the side of the first through slot facing away from the display panel, the distance from the surface of the buffer structure facing away from the display panel to the display panel being greater than the distance from the surface of the support structure facing away from the display panel to the display panel along a second direction, the first direction intersecting the second direction. The buffer structure is arranged on the side of the first through slot in the support structure facing away from the display panel, so that the stress borne by the display panel is buffered when the display module is bent or deformed, and the phenomenon of the display panel being pulled apart or damaged hardly occurs.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to display modules and display devices. Background Technology

[0002] Display modules, such as foldable display modules, are flexible or foldable, breaking through the form limitations of traditional flat display modules. The flexible display panel is the core component of a foldable display module, typically using organic light-emitting diode (OLED) or liquid crystal display (LCD) panels. Flexible display modules using OLED technology offer more significant advantages. Foldable display modules greatly reduce the size of devices, making them easy to carry. The display area can also be flexibly adjusted as needed, saving space while meeting diverse usage requirements. However, due to limitations in related technologies, current display modules still require improvement. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display module and a display device.

[0004] The first aspect of this application provides a display module, including:

[0005] The display panel includes a first display section, a second display section, and a bending section. In use, the second display section is located on the backlight side of the first display section, and the backlight side of the second display section is located on the light-emitting side of the second display section closer to the first display section. The first display section and the second display section are connected by the bending section.

[0006] A support structure is located on the backlight side of the display panel. The support structure has a first through groove. Along a first direction, the first through groove passes through the support structure. The first through groove is correspondingly arranged with the bent part, and the opening of the first through groove is away from the display panel.

[0007] The buffer structure, at least part of which is located on the side of the first through slot away from the display panel, is located in the second direction. The distance from the surface of the buffer structure away from the display panel to the display panel is greater than the distance from the surface of the support structure away from the display panel to the display panel. The first direction intersects with the second direction.

[0008] In one embodiment, the buffer structure is viscous;

[0009] And / or, the viscosity of the cushioning structure is greater than or equal to 1000 gf / inch;

[0010] And / or, the material of the cushioning structure includes at least one of silicone gel and acrylic adhesive.

[0011] In one embodiment, under conditions of 18°C ​​or higher and 25°C or lower, the energy storage modulus of the buffer structure is greater than or equal to 50 kPa and less than or equal to 80 kPa.

[0012] And / or, under conditions of greater than 25°C and less than or equal to 50°C, the energy storage modulus of the buffer structure is greater than or equal to 20 kPa and less than or equal to 40 kPa.

[0013] And / or, under conditions of greater than or equal to -20°C and less than 18°C, the energy storage modulus of the buffer structure is greater than or equal to 2000 kPa and less than or equal to 5000 kPa.

[0014] And / or, the buffer structure includes conductive material;

[0015] And / or, the conductive material includes at least one of carbon nanotubes and graphene;

[0016] And / or, the volume resistivity of the buffer structure is greater than or equal to 10. 6 and less than or equal to 10 11 Ohm-M;

[0017] And / or, in the first direction, the length of the buffer structure is less than the length of the first through slot.

[0018] In one embodiment, in the second direction, the first through slot includes a first end and a second end disposed opposite to each other, with the first end located on the side of the second end closer to the display panel;

[0019] In the third direction, the width of the first through slot near the first end is smaller than the width of the first through slot near the second end, and the first direction intersects with the third direction;

[0020] And / or, along the direction away from the first end, the width of the first through slot gradually increases in the third direction.

[0021] In one embodiment, the first through slot has N first sub-sections, the width of the i-th first sub-section in the third direction is less than the width of the (i+1)-th first sub-section in the third direction, the i-th first sub-section is located on the side of the (i+1)-th first sub-section closer to the first end, N is an integer greater than or equal to 2, and i is any integer from 1 to N; the first direction intersects with the third direction.

[0022] And / or, along the direction away from the first end, the width of the i-th first sub-part gradually increases in the third direction;

[0023] And / or, along the direction away from the first end, the width of the i-th first sub-part is consistent in the third direction.

[0024] In one embodiment, there are multiple first through slots, and in the third direction, the multiple first through slots are spaced apart, and the first direction intersects with the third direction;

[0025] And / or, the number of buffer structures is the same as the number of first through slots, with one buffer structure corresponding to one first through slot; or, the number of buffer structures is one, with at least some of the buffer structures located on the side of the plurality of first through slots away from the display panel;

[0026] And / or, in the second direction, the first through-slot penetrates the support structure.

[0027] In one embodiment, the first display part has a bending area, and the support structure has a second through groove. The second through groove is disposed corresponding to the bending area and passes through the support structure along the first direction.

[0028] And / or, in the second direction, the second through slot includes a third end and a fourth end disposed opposite to each other, the third end being located on the side of the fourth end closer to the display panel;

[0029] In the fourth direction, the width of the second through groove near the third end is smaller than the width of the second through groove near the fourth end, and the first direction intersects with the fourth direction;

[0030] And / or, along the direction away from the third end, the width of the second through groove gradually increases in the fourth direction.

[0031] In one embodiment, the second through slot has M second sub-sections, the width of the j-th second sub-section in the fourth direction is less than the width of the (j+1)-th second sub-section in the fourth direction, the j-th second sub-section is located on the side of the (j+1)-th second sub-section closer to the third end, M is an integer greater than or equal to 2, and j is any integer from 1 to M.

[0032] And / or, along the direction away from the third end, the width of the j-th second sub-part gradually increases in the fourth direction;

[0033] And / or, along the direction away from the third end, the width of the j-th second sub-part is consistent in the fourth direction;

[0034] And / or, the number of first through slots is multiple, and in the fourth direction, the multiple first through slots are spaced apart.

[0035] A second aspect of this application provides a display device, comprising:

[0036] The housing, which includes the containing space;

[0037] The aforementioned display module is located in the housing space, and the buffer structure in the display module is bonded to the housing. The end of the first display part of the display module away from the bending part is not fixedly connected to the housing.

[0038] In one embodiment, the end of the first display portion away from the bend is snapped into the housing;

[0039] And / or, the end of the second display unit away from the bend is fixedly connected to the housing;

[0040] And / or, also includes encapsulating adhesive, located between the bend and the housing.

[0041] According to the display module provided in the embodiments of this application, a buffer structure is provided on the side of the first through groove in the support structure away from the display panel, so that the stress on the display panel is buffered when the display module is bent or deformed, and the phenomenon of the display panel being pulled off or broken is almost non-existent, and the film layers in the display panel will not peel off; in the display device, the display module and the housing will also hardly peel off, thereby improving the stability and service life of the display module and the display device. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the cross-sectional structure of the display module in one embodiment of this application.

[0043] Figure 2 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0044] Figure 3 This is a bottom view of the display module in one embodiment of this application.

[0045] Figure 4 for Figure 1 The diagram shows a partially enlarged view of the display module at point A.

[0046] Figure 5 for Figure 1 Another enlarged view of the display module at point A.

[0047] Figure 6 for Figure 1 Another enlarged view of the display module at point A.

[0048] Figure 7 for Figure 1 Another enlarged view of the display module at point A.

[0049] Figure 8 for Figure 1 Another enlarged view of the display module at point A.

[0050] Figure 9 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0051] Figure 10 for Figure 9 The diagram shows a partially enlarged view of the display module at point B.

[0052] Figure 11 for Figure 9 Another enlarged schematic diagram of the display module at point B.

[0053] Figure 12 for Figure 9 Another enlarged schematic diagram of the display module at point B.

[0054] Figure 13 for Figure 9 Another enlarged schematic diagram of the display module at point B.

[0055] Figure 14 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0056] Figure 15 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0057] Figure 16 This is a cross-sectional structural diagram of a display device in one embodiment of this application. Detailed Implementation

[0058] 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.

[0059] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0062] As users' demands for terminals increase, the adoption of dual-screen displays (front and back) has become a new trend. In dual-screen technology, the main screen is typically larger and foldable, while the secondary screen is smaller and its display surface is on the side away from the user. To reduce the number of components and retain more battery space, the current common approach is to extend the secondary screen from the main screen. A circuit connects the two screens, and the main and secondary screens are fixed to the sides of the device by bending the circuit area. However, this dual-screen solution still has some problems. Specifically, the bending area between the main and secondary screens is relatively fragile and will generate significant bending stress after bending. This stress can affect the fixation of the secondary screen and also the bending of the main screen during use, thus affecting the stability and lifespan of the display module.

[0063] In view of the above, the first aspect of this application provides a display module, referring to... Figure 1 and Figure 2 The diagram shows a cross-sectional structure of the display module, which includes a display panel 100, a support structure 200, and a buffer structure 300.

[0064] Optionally, the display panel 100 includes a first display portion 110, a second display portion 120, and a bending portion 130. In use, the second display portion 120 is located on the backlight side of the first display portion 110 (see reference). Figure 2 The backlight side of the second display unit 120 is located on the side of the light-emitting side of the second display unit 120 that is close to the first display unit 110; the first display unit 110 and the second display unit 120 are connected by a bending portion 130.

[0065] For example, the first display unit 110 is the main screen, and the second display unit 120 is the secondary screen. In use, the secondary screen is located on the backlight side of the main screen, and the backlight sides of the secondary screen and the main screen are close to each other. Figure 1 This is a schematic diagram of the cross-sectional structure of the display module when the bent portion 130 is not bent. Figure 2 This is a schematic diagram of the cross-sectional structure of the display module after the bending section 130 is bent.

[0066] For example, the length of the main screen is greater than the length of the secondary screen, and the width of the main screen and the width of the secondary screen are the same.

[0067] For example, the bending portion 130 is a static bending portion, that is, after the bending portion 130 is bent, its shape substrate will not change. The bending portion 130 is fixed to the housing of the display device by the buffer structure 300.

[0068] For example, the bending portion 130 includes a circuit structure that connects the first display portion 110 and the second display portion 120 together, and the first display portion 110 and the second display portion 120 can be driven by the same driving circuit.

[0069] Optionally, the support structure 200 is located on the backlight side of the display panel 100, and the support structure 200 has a first through slot 210, as shown in the figure. Figure 3 The schematic diagram of the display module from below shows that, along the first direction x, the first through groove 210 penetrates the support structure 200. The first through groove 210 is correspondingly provided with the bent part 130, and the opening of the first through groove 210 is away from the display panel 100.

[0070] It should be noted that in the diagram of the structure viewed from below, the observer is located on the backlight side of the display module.

[0071] It is understandable that the first direction x can be a direction perpendicular to the extension directions of the first display unit 110 and the second display unit 120.

[0072] For example, the first through groove 210 penetrates the support structure 200. When the bent portion 130 is bent, it helps to alleviate the stress concentration in the support structure 200 corresponding to the bent portion 130, so that the stress in the support structure 200 corresponding to the bent portion 130 is relatively small, and it is easier to maintain the stability of the support structure 200.

[0073] Optionally, at least a portion of the buffer structure 300 is located on the side of the first through slot 210 facing away from the display panel 100. In the second direction y, the distance from the surface of the buffer structure 300 facing away from the display panel 100 to the display panel 100 is greater than the distance from the surface of the support structure 200 facing away from the display panel 100 to the display panel 100. The first direction x intersects with the second direction y. For example, the first direction x and the second direction y are perpendicular to each other.

[0074] It is understandable that the buffer structure 300 has a certain deformation capability. The buffer structure 300 may be partially filled in the first through groove 210. At least part of the buffer structure 300 is located on the side of the first through groove 210 away from the display panel 100. This means that the buffer structure 300 that is not filled in the first through groove 210 is located on the side of the first through groove 210 away from the display panel 100.

[0075] For example, the fact that at least a portion of the buffer structure 300 is located on the side of the first through slot 210 away from the display panel 100 can be understood as: all of the buffer structure 300 is located on the side of the first through slot 210 away from the display panel 100, in which case the buffer structure 300 is not filled into the first through slot 210; or, a portion of the buffer structure 300 is located on the side of the first through slot 210 away from the display panel 100, and a portion of the buffer structure 300 is filled into the first through slot 210.

[0076] For example, the second direction y can be the thickness direction of the support structure 200, or the second direction y can be the direction parallel to the support structure 200 pointing to the display panel 100.

[0077] According to the display module provided in the embodiments of this application, a buffer structure 300 is provided on the side of the first through groove 210 in the support structure 200 away from the display panel 100, so that the stress on the display panel 100 when the display module is bent or deformed is buffered, and the phenomenon of the display panel 100 being pulled off or broken is almost non-existent, and the film layers in the display panel 100 will not peel off; in the display device, the peeling phenomenon between the display module and the housing is also almost non-existent, thereby improving the yield of the display module and the display device.

[0078] In one embodiment, the cushioning structure 300 is adhesive. This allows the cushioning structure 300 to be adhered to the housing, thereby improving the stability of the bending portion 130.

[0079] Optionally, the adhesive strength of the cushioning structure 300 is greater than or equal to 1000 g / in, for example, it can be 1000 g / in, 2000 g / in, 3000 g / in, 4000 g / in, or 5000 g / in. This allows the cushioning structure 300 to be adhered to the housing, thereby improving the stability of the bending portion 130.

[0080] In one embodiment, under conditions of 18°C ​​or higher and 25°C or lower, the energy storage modulus of the buffer structure 300 is greater than or equal to 50 kPa and less than or equal to 80 kPa, for example, it can be 50 kPa, 60 kPa, 70 kPa, or 80 kPa; under conditions of 25°C or higher and 50°C or lower, the energy storage modulus of the buffer structure 300 is greater than or equal to 20 kPa and less than or equal to 40 kPa, for example, it can be 20 kPa, 30 kPa, or 40 kPa; under conditions of -20°C or higher and less than 18°C, the energy storage modulus of the buffer structure 300 is greater than or equal to 2000 kPa and less than or equal to 5000 kPa, for example, it can be 2000 kPa, 3000 kPa, 4000 kPa, or 5000 kPa. Therefore, the buffer structure 300 has a suitable energy storage modulus at different temperatures, which makes the display module have a wide range of stable applications. The display module can be used in different scenarios. For example, the display module can be used in low-temperature scenarios (such as winter) or high-temperature scenarios (such as summer).

[0081] Storage modulus is an important parameter in the dynamic mechanical properties of materials, reflecting the material's ability to store elastic deformation energy under periodic strain. Simply put, from a mechanical perspective, when a material is subjected to alternating stress (such as sinusoidal stress), the stress can be decomposed into a portion that is in phase with the strain and a portion that is 90° out of phase with the strain. The storage modulus corresponds to the stress portion that is in phase with the strain; it represents the elastic deformation characteristic of the material, much like a spring that stores energy when subjected to force and releases that energy after the stress is removed, allowing the material to return to its original shape.

[0082] For example, when the energy storage modulus of the buffer structure 300 is within the above range, the buffer structure 300 has a strong resistance to deformation, so that when the display panel 100 is deformed (e.g., bent), the stress can be buffered by the buffer structure 300, so that the display panel 100 hardly undergoes a large displacement, thereby protecting the film layer structure of the first display part 110 and the second display part 120 from damage, and the display module hardly detaches from the housing of the display device, thus improving the yield of the display module.

[0083] Optionally, the material of the cushioning structure 300 includes at least one of silicone gel and acrylic adhesive (also known as acrylic glue).

[0084] It is understandable that when the display module deforms, the bending portion 130, which contains a circuit structure, will inevitably generate static electricity. This static electricity can affect signal transmission within the circuit structure, thereby affecting the display effect of the display module. Optionally, the buffer structure 300 includes a conductive material. The conductive material will promptly discharge the static electricity in the bending portion 130, making the signal transmission in the bending portion 130 almost unaffected by static electricity, allowing the display module to maintain a better display effect even during repeated bending or deformation.

[0085] Optionally, the conductive material includes at least one of carbon nanotubes and graphene. Therefore, the conductive material exhibits better conductivity and static electricity elimination.

[0086] Optionally, the volume resistivity of the buffer structure 300 is greater than or equal to 10. 6 Ohm-meter, and less than or equal to 10 11 Ohm-meter, for example, can be 10 6 Ohm-M., 10 7 Ohm-M., 10 8 Ohm-M., 10 9 Ohm-M., 10 10 Ohm-M or 10 11 Ohm-Meier, etc. Therefore, the buffer structure 300 has better conductivity and better static electricity elimination effect.

[0087] Optionally, in the first direction x, the length of the buffer structure 300 is less than the length of the first through groove 210. As a result, the buffer structure 300 may deform when subjected to compression or stretching, and its length in the first direction x becomes equal to the length of the first through groove 210. The above-mentioned configuration allows for the deformation of the buffer structure 300, which is beneficial to further improve the stability of the bending portion 130.

[0088] For example, in the first direction, the difference between the length of the buffer structure 300 and the length of the first through groove 210 can be greater than or equal to 0.1 mm and less than or equal to 0.4 mm. This allows for sufficient allowance for the deformation of the buffer structure 300, providing deformation space when the buffer structure 300 is subjected to compression or stretching, which helps to further improve the stability of the bending portion 130.

[0089] In one embodiment, refer to Figure 4 The schematic diagram of the cross-sectional structure of the display module shown illustrates that, in the second direction y, the first through-slot 210 includes a first end 211 and a second end 212 disposed opposite to each other, with the first end 211 located on the side of the second end 212 closer to the display panel 100; in the third direction z, the width of the first through-slot 210 near the first end 211 is smaller than the width of the first through-slot 210 near the second end 212, and the first direction x intersects with the third direction z. Therefore, the arrangement of the first through-slot 210 facilitates the bending of the bending portion 130, and after the support structure 200 corresponding to the bending portion 130 is bent, stress concentration will almost not occur in the support structure 200, improving the stability of the support structure 200, and thus improving the stability of the display module. Furthermore, when the width of the first through groove 210 near the first end 211 is less than the width of the first through groove 210 near the second end 212, the buffer structure 300 will hardly be completely filled into the first through groove 210. Part of the buffer structure 300 will be located on the side of the first through groove 210 away from the display panel, and the distance from the end of the buffer structure 300 away from the display panel 100 to the display panel 100 will be greater than the distance from the end of the support structure 200 away from the display panel 100 to the display panel 100.

[0090] It should be noted that the third direction z can be the extension direction of the first display unit 110 or the extension direction of the second display unit 120. The plane containing the third direction z and the first direction x is parallel to the plane containing the first display unit 110, or the plane containing the third direction z and the first direction x is parallel to the plane containing the second display unit 120. For example, the third direction z and the first direction x are perpendicular to each other.

[0091] For example, the third direction z intersects the second direction y, or the third direction z and the second direction y are perpendicular to each other. For example, the second direction y and the third direction z are perpendicular to the plane containing the first direction x.

[0092] It should be noted that, Figure 4 In the enlarged schematic diagram of the display module shown, the bent portion 130 is in an unbent state.

[0093] For example, along the direction away from the first end 211, the width of the first through slot 210 gradually increases in the third direction z. As a result, when the width of the first through slot 210 near the first end 211 is less than the width of the first through slot 210 near the second end 212, the buffer structure 300 will hardly be completely filled into the first through slot 210. A portion of the buffer structure 300 will be located on the side of the first through slot 210 away from the display panel, and the distance from the end of the buffer structure 300 away from the display panel 100 to the display panel 100 will be greater than the distance from the end of the support structure 200 away from the display panel 100 to the display panel 100.

[0094] In one embodiment, refer to Figure 5 The schematic diagram of the cross-sectional structure of the display module shown shows that the first through-slot 210 has N first sub-parts 213. The width of the i-th first sub-part 213 in the third direction z is less than the width of the (i+1)-th first sub-part 213 in the third direction z. The i-th first sub-part 213 is located on the side of the (i+1)-th first sub-part 213 closest to the first end 211. N is an integer greater than or equal to 2, and i is any integer from 1 to N. The first direction x intersects with the third direction z. As a result, the sidewall of the first through-slot 210 has a stepped structure, making it less likely for the buffer structure 300 to fill into the first through-slot 210. This makes it more advantageous for the buffer structure 300 to be exposed on the side of the first through-slot 210 away from the display panel, and makes the distance from the end of the buffer structure 300 away from the display panel 100 to the display panel 100 greater than the distance from the end of the support structure 200 away from the display panel 100 to the display panel 100.

[0095] It is understandable that the buffer structure 300 not being filled into the first through groove 210 allows for gaps in the first through groove 210, which facilitates the bending of the support structure 200, and the bent support structure 200 experiences almost no stress concentration in the area where the first through groove 210 is located.

[0096] Optionally, refer to Figure 5 Along the direction away from the first end 211, the width of the i-th first sub-part 213 is consistent in the third direction z. As a result, the sidewall of the first through groove 210 has a stepped structure, making it less likely for the buffer structure 300 to fill into the first through groove 210, and more conducive to the buffer structure 300 being exposed on the side of the first through groove 210 away from the display panel.

[0097] Optionally, refer to Figure 6The schematic diagram of the cross-sectional structure of the display module shown shows that, along the direction away from the first end 211, the width of the i-th first sub-part 213 gradually increases in the third direction z. At this time, the width of each first sub-part 213 gradually increases in the third direction z, making it less likely for the buffer structure 300 to fill into the first through slot 210, and making it more advantageous for the buffer structure 300 to be exposed on the side of the first through slot 210 away from the display panel.

[0098] In one embodiment, refer to Figure 7 The schematic diagram of the cross-sectional structure of the display module shown indicates that there are multiple first through slots 210. These slots are spaced apart along the third direction z, and the first direction x intersects with the third direction z. Therefore, having multiple first through slots 210 is more effective in mitigating stress concentration after bending of the support structure 200, resulting in greater stability of the support structure 200 and thus improving the stability of the display module.

[0099] Optionally, there may be one buffer structure 300, with at least a portion of the buffer structure 300 located on the side of the plurality of first through slots 210 facing away from the display panel 100. In this case, a single buffer structure 300 corresponds to the plurality of first through slots 210, which is convenient for manufacturing and provides a better stress buffering effect.

[0100] Optionally, refer to Figure 8 The number of buffer structures 300 is the same as the number of first through slots 210, with one buffer structure 300 corresponding to one first through slot 210. The design of multiple buffer structures 300 is more flexible, each buffer structure 300 has a smaller volume, is more sensitive to force, and has a better effect on buffering stress.

[0101] It should be noted that the corresponding arrangement of a buffer structure 300 and a first through slot 210 means that multiple buffer structures 300 are spaced apart in the third direction z, and a buffer structure 300 is at least partially located on the side of the corresponding first through slot 210 away from the display panel 100.

[0102] Optionally, in the second direction y, the first through groove 210 penetrates the support structure 200. This is more conducive to the bending of the support structure 200 and has a better effect in relieving stress concentration.

[0103] In one embodiment, refer to Figure 9The schematic diagram of the cross-sectional structure of the display module shown illustrates that the first display section 110 has a bending region 111, and the support structure 200 has a second through groove 220. The second through groove 220 is correspondingly disposed to the bending region 111 and extends through the support structure 200 along the first direction x. When the bending region 111 is bent, it helps to alleviate stress concentration in the support structure 200 corresponding to the bending region 111, resulting in relatively low stress in the support structure 200 and making it easier to maintain the stability of the support structure 200.

[0104] Optionally, refer to Figure 10 The diagram shows a partially enlarged view of the display module. In the second direction y, the second through-slot 220 includes a third end 221 and a fourth end 222 disposed opposite to each other, with the third end 221 located on the side of the fourth end 222 closer to the display panel 100. In the fourth direction a, the width of the second through-slot 220 near the third end 221 is smaller than the width of the second through-slot 220 near the fourth end 222. The first direction x intersects with the fourth direction a. Therefore, the arrangement of the second through-slot 220 facilitates the bending of the bending area 111, and after the support structure 200 corresponding to the bending area 111 is bent, there is almost no stress concentration in the support structure 200, improving the stability of the support structure 200 and thus improving the stability of the display module.

[0105] It should be noted that the fourth direction a can be the extension direction of the first display unit 110 or the extension direction of the second display unit 120. The plane containing the fourth direction a and the first direction x is parallel to the plane containing the first display unit 110, or the plane containing the fourth direction a and the first direction x is parallel to the plane containing the second display unit 120. For example, the fourth direction a and the first direction x are perpendicular to each other.

[0106] For example, the fourth direction a intersects the second direction y, or the fourth direction a and the second direction y are perpendicular to each other. For example, the second direction y and the fourth direction a are perpendicular to the plane containing the first direction x.

[0107] For example, when the bent portion 130 of the display module is not bent, the fourth direction a can be parallel to the third direction z.

[0108] For example, along the direction away from the third end 221, the width of the second through groove 220 gradually increases in the fourth direction a. As a result, the arrangement of the second through groove 220 facilitates the bending of the bending area 111, and after the support structure 200 corresponding to the bending area 111 is bent, there is almost no stress concentration in the support structure 200, which improves the stability of the support structure 200 and thus improves the stability of the display module.

[0109] In one embodiment, refer to Figure 11The schematic diagram of the cross-sectional structure of the display module shown illustrates that the second through-slot 220 has M second sub-sections 223. The width of the j-th second sub-section 223 in the fourth direction a is smaller than the width of the (j+1)-th second sub-section 223 in the fourth direction a. The j-th second sub-section 223 is located on the side of the (j+1)-th second sub-section 223 closest to the third end 221. M is an integer greater than or equal to 2, and j is any integer from 1 to M. Therefore, the sidewall of the second through-slot 220 has a stepped structure. When bending the bending area 111, the gap inside the second through-slot 220 increases in a stepped manner in the direction away from the display panel 100, which helps to provide sufficient space for the bending of the support structure 200 and reduces stress concentration in the support structure 200.

[0110] For example, refer to Figure 11 Along the direction away from the third end 221, the width of the j-th second sub-part 223 is consistent in the fourth direction a.

[0111] For example, refer to Figure 12 The schematic diagram of the cross-sectional structure of the display module shown shows that, along the direction away from the third end 221, the width of the j-th second sub-part 223 gradually increases in the fourth direction a.

[0112] For example, refer to Figure 13 There are multiple second through slots 220, which are spaced apart in the fourth direction a. Therefore, having multiple second through slots 220 is more conducive to alleviating the stress concentration problem after the support structure 200 is bent, making the support structure 200 more stable, and thus improving the stability of the display module.

[0113] It is understandable that bending the bending area 111 can be bending the first display part 110 of the main screen, and the shape after bending can be referred to Figure 14 At this time, the display surface of the first display unit 110 is folded and hidden, and the second display unit 120 displays information, such as time, weather, temperature, date, and message reminders. When the first display unit 110 is in the extended state, the second display unit 120 does not display anything.

[0114] For example, refer to Figure 15 The display module may also include a protective layer 400, an adhesive layer 500, a polarizer 600, an optical adhesive layer 700, and a cover plate 800. The protective layer 400 is located on the side of the display panel 100 close to the support structure 200. The adhesive layer 500 is located between the protective layer 400 and the support structure 200. The polarizer 600 is located on the side of the display panel 100 away from the support structure 200. The cover plate 800 is located on the side of the polarizer 600 away from the support structure 200. The optical adhesive layer 700 is located between the polarizer 600 and the cover plate 800.

[0115] For example, the protective layer 400 can be BPF (Bottom Protection Film), the adhesive layer 500 can be pressure-sensitive adhesive (PSA), and the cover plate 800 can be made of colorless transparent polyimide (CPI).

[0116] For example, the first display unit 110 and the second display unit 120 share the same power supply, which helps to reduce the size of the display module.

[0117] For example, the material of the support structure 200 includes, but is not limited to, titanium alloy, carbon fiber, etc.

[0118] For example, the display panel 100 includes an array substrate, which can be a flexible array substrate. For instance, the structure of the flexible array substrate includes a substrate, a barrier layer, and a thin-film transistor structure layer; wherein the substrate is the base component used to support the entire array structure. In flexible array substrates, to achieve flexibility, the substrate material is typically an organic material, such as polyimide, polycarbonate, polyethylene terephthalate, polymethyl methacrylate, and their modified forms. These organic materials have advantages such as light weight and bendability, meeting the basic requirements of flexible substrates. The barrier layer is located above the substrate and mainly serves to block water and oxygen and protect the internal circuit structure. It is usually made of inorganic materials, such as one or more combinations of alumina, silicon oxide, silicon nitride, silicon oxynitride, silicon carbide, titanium oxide, zirconium oxide, and zinc oxide. Its thickness is generally within a specific range to ensure good barrier effect. Thin-film transistor (TFT) structural layers are the core functional layers of the array substrate, including buffer layers, light-shielding layers, active layers, gate insulating layers, gate layers, interlayer dielectric layers, contact holes, source / drain layers, passivation layers, wiring layers, planarization layers, etc. The selection of materials for each layer needs to meet the corresponding electrical performance and process requirements. For example, inorganic layers such as silicon oxide and silicon nitride can be used for the gate insulating layer.

[0119] For example, the display panel may also include pixel units, each pixel unit comprising multiple light-emitting devices. These light-emitting devices may be organic light-emitting diodes (OLEDs), micro light-emitting diodes (Micro LEDs), quantum dot light-emitting diodes (QLEDs), etc. The light-emitting devices may be of various colors, such as red light-emitting device R, green light-emitting device G, blue light-emitting device B, etc.

[0120] For example, the light-emitting device includes a first electrode and a second electrode, and at least one organic light-emitting functional layer located between the first electrode and the second electrode. The first electrode is located on the side of the second electrode closer to the array substrate, and the first electrode is at least partially exposed to the light emission port. The first electrode can be an anode, and the second electrode can be a cathode. The at least one organic light-emitting functional layer includes an emitting layer (EML), and may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron-blocking layer (EBL) located between the anode and the emitting layer (EML), and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole-blocking layer (HBL) located between the cathode and the emitting layer (EML).

[0121] Optionally, the display module may also include an isolation structure, typically using a fine metal mask (FMM) to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limited precision, high development costs, and long development cycles. Using an isolation structure allows for precise patterning of light-emitting pixels without the need for an FMM. The absence of a fine metal mask eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance characteristics, offering advantages such as high performance, full-size display, and agile delivery. The isolation structure is used to electrically isolate adjacent light-emitting devices, specifically isolating at least a portion of the organic light-emitting functional layer and the first electrode of adjacent light-emitting devices. In one embodiment, the isolation structure includes a first part and a second part stacked together, with the first part located on the side of the second part facing away from the substrate, and the orthographic projection of the first part onto the substrate covering the orthographic projection of the second part onto the substrate. The isolation structure also includes a third part located on the side of the second part closer to the substrate, with the orthographic projection of the second part onto the substrate within the orthographic projection range of the third part onto the substrate. For example, the second part is a conductive film layer made of aluminum, and the third part is a conductive film layer made of molybdenum. In this case, the cross-section of the isolation structure is I-shaped.

[0122] A second aspect of this application provides a display device, with reference to... Figure 16 The diagram shows a cross-sectional structure of the display device, which includes a housing 10 and the aforementioned display module.

[0123] Optionally, the housing 10 includes a receiving space 11; the display module is located in the receiving space 11, and the buffer structure 300 in the display module is bonded to the housing 10. The end of the first display portion 110 of the display module 20 away from the bending portion 130 is not fixedly connected to the housing 10. Thus, when the bending area 111 in the first display portion 110 is bent or stretched, the stress generated by bending can be absorbed by the expansion and contraction adjustment between the end of the first display portion 110 away from the bending portion 130 and the housing 10, preventing the display module from peeling off from the housing due to excessive stress, thereby improving the stability and yield of the display device.

[0124] In one embodiment, the end of the first display portion 110 away from the bending portion 130 is engaged with the housing 10. Thus, when the bending area 111 in the first display portion 110 is bent or extended, there is a certain space allowance between the first display portion 110 and the housing 10 for telescopic adjustment.

[0125] Optionally, the end of the second display section 120 away from the bent section 130 is fixedly connected to the housing 10.

[0126] Optionally, the display device also includes encapsulating adhesive 30 located between the bent portion 130 and the housing 10. This facilitates filling the gap between the support structure 200 corresponding to the bent portion 130 and the housing 10, providing support for the support structure 200.

[0127] For example, the encapsulating adhesive 30 is manufactured in a manner including but not limited to applying adhesive to both sides of the support structure 200 corresponding to the bent portion 130 in the first direction x, so that the side of the display module is completely fixed with the potting adhesive.

[0128] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0129] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display module, characterized in that, include: The display panel includes a first display section, a second display section, and a bending section. In use, the second display section is located on the backlight side of the first display section, and the backlight side of the second display section is located on the light-emitting side of the second display section closer to the first display section. The first display section and the second display section are connected through the bending section. A support structure is located on the backlight side of the display panel. The support structure has a first through groove that extends through the support structure along a first direction. The first through groove is correspondingly arranged with the bent portion, and the opening of the first through groove is away from the display panel. A buffer structure, at least a portion of which is located on the side of the first through slot away from the display panel, wherein in a second direction, the distance from the surface of the buffer structure away from the display panel to the display panel is greater than the distance from the surface of the support structure away from the display panel to the display panel, and the first direction intersects the second direction.

2. The display module according to claim 1, characterized in that, The buffer structure is viscous; And / or, the viscosity of the buffer structure is greater than or equal to 1000 gf / inch; And / or, the material of the buffer structure includes at least one of silicone gel and acrylic adhesive.

3. The display module according to claim 1, characterized in that, Under conditions of 18°C ​​or higher and 25°C or lower, the energy storage modulus of the buffer structure is greater than or equal to 50 kPa and less than or equal to 80 kPa. And / or, under conditions of greater than 25°C and less than or equal to 50°C, the energy storage modulus of the buffer structure is greater than or equal to 20 kPa and less than or equal to 40 kPa; And / or, under conditions of greater than or equal to -20°C and less than 18°C, the energy storage modulus of the buffer structure is greater than or equal to 2000 kPa and less than or equal to 5000 kPa. And / or, the buffer structure includes a conductive material; And / or, the conductive material includes at least one of carbon nanotubes and graphene; And / or, the volume resistivity of the buffer structure is greater than or equal to 10. 6 and less than or equal to 10 11 Ohm-M; And / or, in the first direction, the length of the buffer structure is less than the length of the first through slot.

4. The display module according to claim 1, characterized in that, In the second direction, the first through slot includes a first end and a second end disposed opposite to each other, with the first end located on the side of the second end closer to the display panel; In the third direction, the width of the first through slot near the first end is smaller than the width of the first through slot near the second end, and the first direction intersects with the third direction; And / or, along the direction away from the first end, the width of the first through groove gradually increases in the third direction.

5. The display module according to claim 4, characterized in that, The first through slot has N first sub-sections, the width of the i-th first sub-section in the third direction is less than the width of the (i+1)-th first sub-section in the third direction, the i-th first sub-section is located on the side of the (i+1)-th first sub-section closer to the first end, N is an integer greater than or equal to 2, and i is any integer from 1 to N; the first direction intersects with the third direction. And / or, along the direction away from the first end, the width of the i-th first sub-part gradually increases in the direction of the third party; And / or, along the direction away from the first end, the width of the i-th first sub-part is consistent in the direction of the third party.

6. The display module according to claim 1, 4, or 5, characterized in that, There are multiple first through slots, and in the third direction, the multiple first through slots are spaced apart, and the first direction intersects with the third direction; And / or, the number of buffer structures is the same as the number of first through slots, and one buffer structure is correspondingly provided with one first through slot; or, the number of buffer structures is 1, and at least some of the buffer structures are located on the side of the plurality of first through slots away from the display panel; And / or, in the second direction, the first through-slot penetrates the support structure.

7. The display module according to claim 1, characterized in that, The first display section has a bending area, and the support structure has a second through groove, which is disposed corresponding to the bending area. Along the first direction, the second through groove penetrates the support structure. And / or, in the second direction, the second through slot includes a third end and a fourth end disposed opposite to each other, the third end being located on the side of the fourth end closer to the display panel; In the fourth direction, the width of the second through slot near the third end is smaller than the width of the second through slot near the fourth end, and the first direction intersects the fourth direction; And / or, along the direction away from the third end, the width of the second through groove gradually increases in the fourth direction.

8. The display module according to claim 7, characterized in that, The second through slot has M second sub-parts, the width of the j-th second sub-part in the fourth direction is less than the width of the (j+1)-th second sub-part in the fourth direction, the j-th second sub-part is located on the side of the (j+1)-th second sub-part closer to the third end, M is an integer greater than or equal to 2, and j is any integer from 1 to M; And / or, along the direction away from the third end, the width of the j-th second sub-part gradually increases in the fourth direction; And / or, along the direction away from the third end, the width of the j-th second sub-part is consistent in the fourth direction; And / or, the number of the second through slots is multiple, and the multiple second through slots are spaced apart in the fourth direction.

9. A display device, characterized in that, include: A housing, the housing including a receiving space; The display module according to any one of claims 1 to 8 is located in the receiving space, and the buffer structure in the display module is bonded to the housing, wherein the end of the first display portion of the display module away from the bending portion is not fixedly connected to the housing.

10. The display device according to claim 9, characterized in that, The end of the first display unit away from the bend is engaged with the housing. And / or, the end of the second display portion away from the bent portion is fixedly connected to the housing; And / or, it also includes encapsulating adhesive located between the bend and the housing.

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