Display module and display device

Abstract

The application provides a display module and a display device, and belongs to the technical field of display, and comprises a display panel, a flexible circuit board, one end of the flexible circuit board being connected with the display panel, and the flexible circuit board being bent to the backlight surface of the display panel through a first bending section; wherein the flexible circuit board further comprises a connecting portion and a second bending section, the connecting portion and the backlight surface of the display panel being connected through at least one connecting adhesive layer, one end of the connecting portion being connected with the first bending section, and the other end of the connecting portion being connected with the second bending section; the display module further comprises at least one reinforcing structure, the at least one reinforcing structure being located at the position of the second bending section, and / or the at least one reinforcing structure being located on the connecting portion. Through the display module and the display device provided by the application, the mechanical strength of the position of the flexible circuit board in the display module can be improved, and the service life of the display module is increased.

Description

Technical Field

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

[0002] With the rapid development of flexible OLED (Organic Light-Emitting Diode) technology, foldable display products have become increasingly popular in the consumer market due to their combination of large-screen visual experience and portability.

[0003] However, given the unique nature of flexible screen materials and technologies, mechanical durability and electrical stability in folded configurations pose a significant challenge. During frequent folding and use, the stress points are primarily concentrated on the FPC (Flexible Printed Circuit) inside the display module, especially the BTB (Board-to-Board) connector area. This area experiences tremendous stress cycles during bending and engagement with the main connector. Prolonged pressure can easily cause fatigue cracks or even failure in the copper wire layers inside the FPC, thus affecting display performance. Summary of the Invention

[0004] This application aims to provide a display module and display device, which are designed to improve the mechanical strength of the flexible circuit board in the display module and increase the service life of the display module.

[0005] The first aspect of this application provides a display module, including:

[0006] Display panel;

[0007] A flexible circuit board, one end of which is connected to the display panel, and the flexible circuit board is bent to the backlight surface of the display panel through a first bending section;

[0008] The flexible circuit board further includes a connecting portion and a second bending section. The connecting portion is connected to the backlight surface of the display panel through at least one adhesive layer. One end of the connecting portion is connected to the first bending section, and the other end is connected to the second bending section.

[0009] The display module further includes at least one reinforcing structure, which is located at the position of the second bending segment, and the orthographic projection of the reinforcing structure on the display panel and the orthographic projection of the second bending segment on the display panel at least partially overlap.

[0010] And / or, the at least one reinforcing structure is located on the connection portion, and the reinforcing structure is connected to the second bending segment.

[0011] Optionally, the second bent segment includes a first surface and a second surface that are opposite to each other;

[0012] The reinforcing structure is located on the first surface, or the reinforcing structure is located on both the first surface and the second surface.

[0013] Optionally, the reinforcing structure further includes a second reinforcing adhesive layer located on a portion of the second surface near the display panel, and extending to the edge of the connection near the second bent section.

[0014] Optionally, the connecting portion is provided with a blocking structure, which is used to prevent the second reinforcing adhesive layer from penetrating into the device area on the connecting portion.

[0015] Optionally, the blocking structure includes a blocking dam that protrudes from the surface of the connecting portion and extends along the width direction of the connecting portion.

[0016] Optionally, the height of the barrier dam is greater than or equal to 0.5 mm.

[0017] Optionally, the blocking structure includes an overflow groove, which is formed on the connecting portion and extends along the width direction of the connecting portion.

[0018] Optionally, the blocking structure and the device area have a first gap, the first gap having a dimension of 0.5 mm or greater in the length direction of the connection portion.

[0019] Optionally, the connecting portion includes a first sub-flexible circuit board and a second sub-flexible circuit board, and the second bending segment includes a third sub-flexible circuit board;

[0020] One end of the second sub-flexible circuit board is connected to the first sub-flexible circuit board, and the other end is connected to the third sub-flexible circuit board;

[0021] The display module also includes a third reinforcing adhesive layer, which is disposed at the connection between the first sub-flexible circuit board and the second sub-flexible circuit board.

[0022] Optionally, the end of the second bent segment away from the connecting portion is connected to an extension segment, the extension segment being parallel to the connecting portion;

[0023] The reinforcement structure includes a supporting adhesive layer located between the extension section and the connecting portion, with one side of the supporting adhesive layer connected to the connecting portion and the other side connected to the extension section.

[0024] Optionally, the reinforcing structure further includes a fourth reinforcing adhesive layer, which is disposed between the second bending section and the display panel, and is connected to the connecting adhesive layer.

[0025] Optionally, the connecting portion includes a first sub-flexible circuit board and a second sub-flexible circuit board, and the second bending segment includes a third sub-flexible circuit board;

[0026] One end of the second sub-flexible circuit board is connected to the first sub-flexible circuit board, and the other end is connected to the third sub-flexible circuit board;

[0027] The display module further includes a fifth reinforcing adhesive layer, which is disposed at the connection between the first sub-flexible circuit board and the second sub-flexible circuit board.

[0028] Optionally, the connecting portion is provided with a device area, and there is a second gap between the supporting adhesive layer and the device area, wherein the dimension of the second gap in the length direction of the connecting portion is greater than or equal to 1.0 mm.

[0029] A second aspect of this application provides a display device, including a display module as provided in the first aspect of this application.

[0030] Beneficial effects:

[0031] This application provides a display module and display device, which includes a display panel and a flexible circuit board. The flexible circuit board includes a connecting portion and a second bending section. One end of the connecting portion is connected to the first bending section, and the other end is connected to the second bending section. The display module also includes at least one reinforcing structure, which is located at the position of the second bending section and / or located on the connecting portion and connected to the second bending section. The reinforcing structure can improve the mechanical strength of the second bending section in the flexible circuit board, thereby improving the mechanical durability of the flexible circuit board. This allows the display module to maintain good structural stability during use, thus increasing the service life of the display module. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.

[0033] Figure 1 This is a schematic diagram of the structure of a display module according to an embodiment of this application;

[0034] Figure 2This is a schematic diagram of the structure of a display module including a first reinforcing adhesive layer and a second reinforcing adhesive layer according to an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a display module including a barrier dam according to an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a display module including an anti-overflow groove according to an embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the structure of a display module comprising a first reinforcing adhesive layer, a second reinforcing adhesive layer and a third reinforcing adhesive layer according to an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the structure of a display module including a supporting adhesive layer according to an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of the structure of a display module including a support adhesive layer and a fourth reinforcing adhesive layer according to an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the structure of a display module comprising a support adhesive layer, a fourth reinforcing adhesive layer and a fifth reinforcing adhesive layer according to an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 10, Display panel; 11, Support layer; 12, Back film; 13, Light-emitting layer; 14, Encapsulation layer; 20, Flexible circuit board; 21, First bending section; 22, Connecting part; 221, Barrier dam; 222, Anti-overflow groove; 23, Second bending section; 231, First surface; 232, Second surface; 24, Extension section; 30, Reinforcing structure; 31, First reinforcing adhesive layer; 32, Second reinforcing adhesive layer; 33, Third reinforcing adhesive layer; 34, Supporting adhesive layer; 35, Fourth reinforcing adhesive layer; 36, Fifth reinforcing adhesive layer; 40, Driver chip; 50, Device area; 60, Connecting adhesive layer; 71, First sub-flexible circuit board; 72, Second sub-flexible circuit board; 73, Third sub-flexible circuit board; A1, First gap; A2, Second gap. Detailed Implementation

[0042] 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, 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.

[0043] In related technologies, the reverse folding scheme of flexible circuit boards in display modules has gradually become the mainstream. The reverse folding of flexible circuit boards refers to bending them to the backlight surface of the display panel and then bending them at least once. This design greatly improves the three-dimensional spatial layout efficiency of the product. While ensuring efficient electrical connection between electronic components, it greatly reduces the thickness and volume of the device, enabling foldable products to achieve large-screen display or multi-functional integration in a compact form, meeting users' dual needs for portability and large-screen experience.

[0044] Because FPCs can be designed and pre-formed on a continuous plane and then precisely fixed into the folding device, assembly complexity is reduced, assembly steps and time are decreased, and costs can potentially be reduced through mass production and automated assembly. At the same time, the integrated design helps reduce weight, which is conducive to the miniaturization and lightweighting trend of electronic products, further enhancing the product's market competitiveness.

[0045] However, under prolonged use and environmental changes, insufficient protection of the folded areas can allow moisture, dust, or other contaminants to enter, affecting circuit performance and even causing circuit corrosion, further reducing product reliability. Simultaneously, the folded area of ​​the FPC experiences significant mechanical stress during repeated folding and unfolding. Due to the physical properties of materials such as copper foil, cover film, and adhesive layers, long-term dynamic bending can easily cause metal fatigue cracks in the internal conductive paths of the FPC, leading to increased resistance, decreased signal transmission quality, and in severe cases, circuit breaks or short circuits. This not only affects the electrical performance stability of the product but also poses a challenge to its lifespan.

[0046] In view of this, this application proposes a display module and display device, which includes a display panel and a flexible circuit board. The flexible circuit board includes a connecting portion and a second bending segment. One end of the connecting portion is connected to the first bending segment, and the other end is connected to the second bending segment. The display module also includes at least one reinforcing structure, which is located at the position of the second bending segment and / or located on the connecting portion and connected to the second bending segment. The reinforcing structure can improve the mechanical strength of the second bending segment in the flexible circuit board, thereby improving the mechanical durability of the flexible circuit board. This allows the display module to maintain good structural stability during use, thereby increasing the service life of the display module.

[0047] Reference Figure 1 As shown, this application discloses a display module, which includes a display panel 10 and a flexible circuit board 20.

[0048] Specifically, the display panel 10 is a foldable display panel 10. Therefore, the display panel 10 may include a support layer 11 and a back film 12, a light-emitting layer 13, and an encapsulation layer 14 disposed on one side of the support layer 11. The support layer 11 and the back film 12 are connected by an adhesive layer. The light-emitting layer 13 and the encapsulation layer 14 are sequentially disposed on the side of the back film 12 away from the support layer 11. The support layer 11 provides support for the entire panel in the display panel 10. The back film 12 mainly provides mechanical support, protection, and encapsulation functions. The light-emitting layer 13 emits light to display image content, and the encapsulation layer 14 mainly protects the light-emitting layer 13.

[0049] Reference Figure 1 As shown, the flexible circuit board 20 includes a first bending section 21, a connecting portion 22, and a second bending section 23. One end of the connecting portion 22 is connected to the first bending section 21, and the other end is connected to the second bending section 23. One end of the flexible circuit board 20 is connected to the display panel 10, and the connecting portion 22 and the second bending section 23 of the flexible circuit board 20 are bent to the backlight surface (the surface opposite to the light emission direction of the display panel 10) of the display panel 10 via the first bending section 21. Different devices are disposed at different positions on the first bending section 21, the connecting portion 22, and the second bending section 23. For example, a driver chip 40 is disposed on the first bending section 21. In this embodiment, the connecting portion 22 and the second bending section 23 are integrated, and the connecting portion 22 and the first bending section 21 can be connected via a bonding port (gold finger or PIN). It is understood that the second bending section 23 of the flexible circuit board 20 is also the reverse bending portion mentioned in related technologies. Meanwhile, the first bending section 21 and the connecting part 22 are connected to the backlight surface of the display panel 10 through the connecting adhesive layer 60.

[0050] Reference Figure 1 As shown, the display module further includes at least one reinforcing structure 30, which is located at the position of the second bending segment 23, and the orthographic projection of the reinforcing structure 30 on the display panel 10 at least partially overlaps with the orthographic projection of the second bending segment 23 on the display panel; and / or, at least one reinforcing structure 30 is located on the connecting portion 22, and the reinforcing structure 30 is connected to the second bending segment 23.

[0051] Specifically, in this embodiment, a reinforcing structure 30 is provided at the location of the second bending segment 23 and / or the location of the connecting portion 22. The reinforcing structures 30 at different locations can be the same structure or different structures. For example, a reinforcing structure 30 can be provided only at the location of the second bending segment 23, or only at the location of the connecting portion 22; or, one reinforcing structure 30 can be provided at the location of the second bending segment 23, and another reinforcing structure 30 can be provided at the location of the connecting portion 22; or, a reinforcing structure 30 can be provided at both the location of the second bending segment 23 and the location of the connecting portion 22.

[0052] By setting a reinforcing structure 30 at the second bending section 23 or the connecting part 22, the stress concentration and weak connection parts that may occur in the flexible circuit board 20 during multiple bending processes can be effectively reinforced and protected. This can not only effectively alleviate the potential damage to the circuit caused by mechanical stress during bending, but also significantly improve the durability and stability of the flexible circuit board 20 in repeated dynamic bending scenarios, thereby enhancing the mechanical strength of the flexible circuit board 20 and increasing the service life of the display module.

[0053] It should be noted that the display panel 10 in the embodiments of this application can be an active light-emitting display panel 10, such as an organic light-emitting diode (OLED) display panel 10, an active-matrix organic light-emitting diode (AMOLED) display panel 10, a passive-matrix organic light-emitting diode (AMOLED) display panel 10, a quantum dot organic light-emitting diode (QLED) display panel 10, etc.

[0054] Reference Figure 1 As shown, in one optional embodiment, this application provides a display module in which the second bent segment 23 includes a first surface 231 and a second surface 232.

[0055] Specifically, the first surface 231 and the second surface 232 are two opposing surfaces in the second bent segment 23. In this embodiment, the first surface 231 is an arcuate surface facing away from the connecting portion 22, and the second surface 232 is an arcuate surface facing the connecting portion 22. Furthermore, the reinforcing structure 30 is located on the first surface 231, or the reinforcing structure 30 is located on both the first surface 231 and the second surface 232.

[0056] Reference Figure 1As shown, in one embodiment, the reinforcing structure 30 includes a first reinforcing adhesive layer 31. The first reinforcing adhesive layer 31 is located between the portion of the first surface 231 near the display panel 10 and the display panel 10, and the first reinforcing adhesive layer 31 is connected to the connecting adhesive layer 60. The portion of the first surface 231 near the display panel 10 refers to the part of the first surface 231 opposite to the display panel 10; it can also be understood that the first reinforcing adhesive layer 31 fills the gap between the first surface 231 and the display panel 10. In this embodiment, the first reinforcing adhesive layer 31 uses a UV (ultraviolet) curable adhesive. UV curable adhesive can cure rapidly under ultraviolet light. Simultaneously, by precisely controlling the coating thickness and uniformity of the UV curable adhesive, a protective layer with both high bonding strength and good flexibility can be formed on the first surface 231. Furthermore, this UV curable adhesive also has excellent electrical insulation properties and environmental adaptability, ensuring that while enhancing the mechanical strength of the flexible circuit board 20, it also optimizes the electrical connection performance between the internal conductor lines of the flexible circuit board 20, reducing problems such as resistance changes or signal interference that may be caused by physical deformation.

[0057] Reference Figure 2 As shown, in one embodiment, the reinforcing structure 30 includes a first reinforcing adhesive layer 31 and a second reinforcing adhesive layer 32. The first reinforcing adhesive layer 31 is disposed between the first surface 231 and the display panel 10, and the second reinforcing adhesive layer 32 is disposed on a portion of the second surface 232 near the display panel 10, extending to the edge of the connecting portion 22. In this embodiment, both the first reinforcing adhesive layer 31 and the second reinforcing adhesive layer 32 are made of UV-curable adhesive. By simultaneously coating and curing both sides of the second bending section 23, stress can be more effectively dispersed, reducing the risk of potential circuit damage caused by bending.

[0058] Furthermore, to further enhance the resilience and reliability of the flexible circuit board 20 in harsh environments, the existing UV-curable adhesive reinforcement solution can be optimized and upgraded. Specifically, after the UV-curable adhesive (including the first reinforcing adhesive layer 31 and the second reinforcing adhesive layer 32) has cured, a waterproof adhesive coating can be formed on its outer surface. This not only enhances the protection level of the flexible circuit board 20, effectively preventing moisture, humidity, and other corrosive substances from penetrating the internal circuitry through the bending gaps, but also provides additional mechanical strength support for the flexible circuit board 20, thereby comprehensively improving the overall durability and functionality of the display module and ensuring that the product exhibits excellent stability and long-lasting performance in various application scenarios.

[0059] Reference Figure 3 and Figure 4As shown, in one embodiment, the reinforcing structure 30 includes a first reinforcing adhesive layer 31 and a second reinforcing adhesive layer 32. The first reinforcing adhesive layer 31 is disposed between the first surface 231 and the display panel 10, and the second reinforcing adhesive layer 32 is disposed on the second surface 232. Simultaneously, a blocking structure is provided on the connecting portion 22 near the second bending section 23. The blocking structure prevents the second reinforcing adhesive layer 32 from penetrating into the device area 50 on the connecting portion 22.

[0060] It is understood that the connection part 22 is provided with a device area 50, and a large number of sensitive components are present in the device area 50. In order to effectively prevent the unexpected flow of UV curing adhesive (second reinforcing adhesive layer 32) during the curing process, and thus eliminate the problem of possible penetration into the sensitive device area 50 and causing unknown electrical risks, the present application embodiment provides a blocking structure on the connection part 22.

[0061] For example, refer to Figure 3 As shown, the blocking structure may include a blocking dam 221, which protrudes from the surface of the connecting portion 22 and extends along the width direction of the connecting portion 22. Specifically, the width direction of the connecting portion 22 is perpendicular to the length direction of the connecting portion, and the width direction of the connecting portion 22 is perpendicular to the height direction of the blocking dam 221. The length direction of the connecting portion refers to the direction from the end connected to the first bent section 21 to the end connected to the second bent section 23. The height of the blocking dam 221 refers to the direction perpendicular to the backlight surface of the display panel 10. The blocking dam 221 may be an ink barrier with sufficient surface tension formed by a printing process, utilizing its physical properties to ensure that the UV-curable adhesive (second reinforcing adhesive layer 32) cures within its boundary without overflowing. In addition, the blocking dam 221 structure may also be constructed using an adhesive layer with excellent high-temperature resistance, such as high-temperature resistant foam adhesive. Meanwhile, the height of the barrier 221 (i.e., the dimension of the barrier 221 in the direction perpendicular to the surface of the connecting part 22) is greater than or equal to 0.5 mm. For example, the height of the barrier 221 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc.

[0062] For example, refer to Figure 4As shown, the blocking structure may include an anti-overflow groove 222, which is formed on the connecting portion 22 and extends along the width direction of the connecting portion 22. Specifically, by forming the anti-overflow groove 222, the contact area between the flexible circuit board 20 and the UV-curable adhesive (second reinforcing adhesive layer 32) can be significantly increased. At the same time, by fully utilizing the unique liquid surface tension characteristics of the UV-curable adhesive, while ensuring that the second bending section 23 is effectively protected and its mechanical durability is enhanced, the UV-curable adhesive is effectively prevented from penetrating into the critical device area 50 on the flexible circuit board 20 due to excessive penetration, thereby effectively preventing the risk of damage to sensitive components. This embodiment not only reduces material costs and manufacturing complexity but also improves the safety of the process and the reliability of the product, which is of great significance for improving the overall performance of the display module.

[0063] It should be noted that a first gap A1 exists between the blocking structure and the device area 50 on the connecting portion 22. The dimension of the first gap A1 in the length direction of the connecting portion 22 is greater than or equal to 0.5 mm. For example, the dimension of the first gap A1 in the length direction of the connecting portion 22 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc. This not only ensures the precise positioning of the UV-curable adhesive (second reinforcing adhesive layer 32) in fixing and protecting the flexible circuit elements, but also reduces potential electrical safety hazards such as short circuits or insulation failures from the source, thereby improving the overall quality and production yield of the display module.

[0064] For example, refer to Figure 5 As shown, in one embodiment, the connecting portion 22 includes a first sub-flexible circuit board 71 and a second sub-flexible circuit board 72, and the second bending segment 23 includes a third sub-flexible circuit board 73.

[0065] The second sub-flexible circuit board 72 is connected at one end to the first sub-flexible circuit board 71 and at the other end to the third sub-flexible circuit board 73. The first sub-flexible circuit board 71 is connected to the first bending segment 21. Meanwhile, the second sub-flexible circuit board 72 is connected to the display panel 10 through the connecting adhesive layer 60. The first sub-flexible circuit board 71, the second sub-flexible circuit board 72 and the third sub-flexible circuit board 73 are integrated into one piece. That is to say, the first sub-flexible circuit board 71 and the display panel 10 are not connected.

[0066] In practical applications, the flexible circuit board 20 typically employs a 2- to 4-layer circuit board structure, with a double-layer design being the most common. The core of this design strategy lies in balancing the requirements of mechanical performance and bending flexibility. Specifically, in the multi-layer structure of the flexible circuit board 20, each layer refers to a copper conductive layer, primarily made of rolled or electrolytic copper. These layers, while ensuring electrical performance, also determine the basic mechanical strength of the flexible circuit board 20. Although the overall physical strength of the double-layer flexible circuit board 20 design is relatively lower than that of a more complex multi-layer structure, its advantage lies in its higher bending flexibility and adaptability, meeting the bending and folding operations required by the display module. Through specialized design of copper layer thickness, distribution, and material selection, the flexible circuit board 20 can, while maintaining efficient signal transmission, maximally adapt to and support the complex dynamic changes of the display module, thereby ensuring the stability and durability of the entire display system.

[0067] In this embodiment, the second sub-flexible circuit board 72 employs a different number of layers than the first sub-flexible circuit board 71 and the third sub-flexible circuit board 73. For example, the second sub-flexible circuit board 72 is a four-layer board, while the first sub-flexible circuit board 71 and the third sub-flexible circuit board 73 are double-layer boards.

[0068] At the same time, refer to Figure 5 As shown, in this embodiment, the display module further includes a third reinforcing adhesive layer 33. The third reinforcing adhesive layer 33 is disposed at the connection between the first sub-flexible circuit board 71 and the second sub-flexible circuit board 72, and is located between the first sub-flexible circuit board 71 and the display panel 10. The third reinforcing adhesive layer 33 can improve the connection strength between the first sub-flexible circuit board 71 and the third sub-flexible circuit board 73, thereby improving the mechanical strength of the entire flexible circuit board.

[0069] Reference Figure 6 As shown, in one optional embodiment, this application provides a display module in which an extension segment 24 is connected to the end of the second bent segment 23 away from the connecting portion 22, and the extension segment 24 is parallel to the connecting portion 22.

[0070] Specifically, components are provided on the extension section 24, and the position opposite to the connecting portion 22 is the BTB connector area mentioned in the related art. In this embodiment, the reinforcing structure 30 includes a supporting adhesive layer 34, which is located between the extension section 24 and the connecting portion 22. One side of the supporting adhesive layer is connected to the connecting portion 22, and the other side is connected to the extension section 24. The supporting adhesive layer 34 can support this area between the extension section 24 and the corresponding connecting portion 22, thus improving the structural stability and mechanical durability of the second bending section 23. The supporting adhesive layer 34 can be made of VHB strong double-sided tape, high-performance foam adhesive, or special adhesives with thermal conductivity.

[0071] It should be noted that in actual products, the extension segment 24 and the connecting portion 22 are not completely parallel. As long as the angle difference between the extension line of the extension segment 24 and the extension line of the connecting portion 22 is within a certain range, the extension segment 24 and the connecting portion 22 can be considered parallel. For example, if the angle difference between the extension line of the extension segment 24 and the extension line of the connecting portion 22 is within 5°, the extension segment 24 and the connecting portion 22 are considered parallel.

[0072] Meanwhile, in this embodiment, to ensure the safety and functional integrity of the components, the coverage area of ​​the supporting adhesive layer 34 must be precisely planned and controlled. Specifically, a device area 50 is provided on the connecting portion 22, and components are disposed within the device area 50. A second gap A2 exists between the supporting adhesive layer 34 and the device area 50. The dimension of the second gap A2 in the length direction of the connecting portion 22 is greater than or equal to 1.0 mm. For example, the dimension of the second gap A2 in the length direction of the connecting portion 22 can be 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, etc. This design not only effectively avoids the risk of electrical performance degradation or short circuits that may be caused by contact between the supporting adhesive layer 34 and the components, but also fully reflects the solution's consideration of refined engineering design and rigorous process requirements, thereby ensuring that the display product achieves high reliability and high durability, and meets the increasingly stringent spatial layout and heat dissipation management requirements.

[0073] Reference Figure 7 As shown, in one embodiment, when the reinforcing structure 30 includes a supporting adhesive layer 34, the reinforcing structure 30 further includes a fourth reinforcing adhesive layer 35. The fourth reinforcing adhesive layer 35 is disposed between the second bending segment 23 and the display panel 10, and is connected to the connecting adhesive layer 60. Specifically, the fourth reinforcing adhesive layer 35 fills the space between the first surface 231 of the second bending segment 23 and the display panel 10. The fourth reinforcing adhesive layer 35 can be a UV-curable adhesive, thereby reinforcing the second bending segment 23 and providing effective physical protection and stability assurance for fragile circuit components.

[0074] By setting the supporting adhesive layer 34 and the fourth reinforcing adhesive layer 35, the comprehensive and robust protection performance of the flexible circuit board 20 can be better improved, effectively reducing the potential failure risk of the flexible circuit board 20 caused by bending fatigue, thermal expansion and contraction, etc., thereby significantly improving the overall durability and reliability of the display module, and ensuring the high performance and long-term stable operation of the product.

[0075] Reference Figure 8 As shown, in one embodiment, the connecting portion 22 includes a first sub-flexible circuit board 71 and a second sub-flexible circuit board 72, and the second bending segment 23 includes a third sub-flexible circuit board 73.

[0076] The second sub-flexible circuit board 72 is connected at one end to the first sub-flexible circuit board 71 and at the other end to the third sub-flexible circuit board 73. The first sub-flexible circuit board 71 is connected to the first bending segment 21. Meanwhile, the second sub-flexible circuit board 72 is connected to the display panel 10 through the connecting adhesive layer 60. The first sub-flexible circuit board 71, the second sub-flexible circuit board 72 and the third sub-flexible circuit board 73 are integrated into one piece. That is to say, the first sub-flexible circuit board 71 and the display panel 10 are not connected.

[0077] In this embodiment, when the reinforcing structure 30 includes a supporting adhesive layer 34 and a fourth reinforcing adhesive layer 35, the display module also includes a fifth reinforcing adhesive layer 36. The fifth reinforcing adhesive layer 36 is disposed at the connection point between the first sub-flexible circuit board 71 and the second sub-flexible circuit board 72, and is located between the first sub-flexible circuit board 71 and the display panel 10. The fifth reinforcing adhesive layer 36 enhances the connection strength between the first sub-flexible circuit board 71 and the third sub-flexible circuit board 73, thereby improving the overall mechanical strength of the flexible circuit board.

[0078] Based on the same inventive concept, embodiments of this application disclose a display device, including any of the display modules described above in the embodiments of this application.

[0079] Specifically, the display device may include computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (PDAs), laptops, digital cameras, portable camcorders, viewfinders, vehicles, large walls, theater screens, or stadium signs, etc.

[0080] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0082] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A display module, characterized in that, include: Display panel; A flexible circuit board, one end of which is connected to the display panel, and the flexible circuit board is bent to the backlight surface of the display panel through a first bending section; The flexible circuit board further includes a connecting portion and a second bending section. The connecting portion is connected to the backlight surface of the display panel through at least one adhesive layer. One end of the connecting portion is connected to the first bending section, and the other end is connected to the second bending section. The connecting portion includes a first sub-flexible circuit board and a second sub-flexible circuit board. The second bending section includes a third sub-flexible circuit board. One end of the second sub-flexible circuit board is connected to the first sub-flexible circuit board, and the other end is connected to the third sub-flexible circuit board. The second sub-flexible circuit board, the first sub-flexible circuit board, and the third sub-flexible circuit board employ a different number of layers. The display module further includes at least one reinforcing structure located at the position of the second bending segment, and the orthographic projection of the reinforcing structure on the display panel at least partially overlaps with the orthographic projection of the second bending segment on the display panel; the second bending segment includes a first surface and a second surface that are opposite to each other; the reinforcing structure is located on the first surface and the second surface; The at least one reinforcing structure is located on the connecting portion, and the reinforcing structure is connected to the second bent section; The reinforcement structure includes a first reinforcing adhesive layer, which is located between the first surface and the display panel, and is connected to the connecting adhesive layer.

2. The display module according to claim 1, characterized in that: The reinforcement structure further includes a second reinforcing adhesive layer, which is located on a portion of the second surface near the display panel and extends to the edge of the connection near the second bent section.

3. The display module according to claim 2, characterized in that: The connecting part is provided with a blocking structure, which is used to prevent the second reinforcing adhesive layer from penetrating into the device area of ​​the connecting part.

4. The display module according to claim 3, characterized in that: The blocking structure includes a blocking dam that protrudes from the surface of the connecting portion and extends along the width direction of the connecting portion.

5. The display module according to claim 4, characterized in that: The height of the barrier dam is greater than or equal to 0.5 mm.

6. The display module according to claim 3, characterized in that: The blocking structure includes an overflow groove, which is formed on the connecting portion and extends along the width direction of the connecting portion.

7. The display module according to claim 3, characterized in that: The blocking structure and the device area have a first gap, the first gap having a dimension of 0.5 mm or greater in the length direction of the connection portion.

8. The display module according to claim 2, characterized in that: The display module also includes a third reinforcing adhesive layer, which is disposed at the connection between the first sub-flexible circuit board and the second sub-flexible circuit board.

9. The display module according to claim 1, characterized in that: The second bent section has an extension section connected to the end away from the connecting part, and the extension section is parallel to the connecting part; The reinforcement structure includes a supporting adhesive layer located between the extension section and the connecting portion, with one side of the supporting adhesive layer connected to the connecting portion and the other side connected to the extension section.

10. The display module according to claim 9, characterized in that: The reinforcement structure further includes a fourth reinforcing adhesive layer, which is disposed between the second bending section and the display panel, and is connected to the connecting adhesive layer.

11. The display module according to claim 9, characterized in that: The connecting portion includes a first sub-flexible circuit board and a second sub-flexible circuit board, and the second bending segment includes a third sub-flexible circuit board. One end of the second sub-flexible circuit board is connected to the first sub-flexible circuit board, and the other end is connected to the third sub-flexible circuit board; The display module further includes a fifth reinforcing adhesive layer, which is disposed at the connection between the first sub-flexible circuit board and the second sub-flexible circuit board.

12. The display module according to claim 9, characterized in that: The connecting part is provided with a device area, and there is a second gap between the supporting adhesive layer and the device area. The second gap has a dimension greater than or equal to 1.0 mm in the length direction of the connecting part.

13. A display device, characterized in that, Includes the display module as described in any one of claims 1-12.

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