Display module

Abstract

The invention discloses a display module which comprises a display panel, a first supporting layer and a first protection layer, the first supporting layer is located on one side of the display panel, and the edge of one side of the first supporting layer is a bending starting point of the display panel. The first protection layer is located on the side, away from the first supporting layer, of the display panel and comprises a stress concentration area and a stress dispersion area, the orthographic projection of the edge of the first supporting layer on the first protection layer is located in the stress concentration area, and the stress dispersion area is located on the side, away from the first supporting layer, of the stress concentration area. The first protective layer has a first thickness in the stress concentration region, the first protective layer has a second thickness in the stress dispersion region, and the second thickness is smaller than the first thickness. Concentrated stress is effectively dispersed through the stress dispersion area with the small thickness, the situation that the stress is concentrated and accumulated at the junction position of the display panel and the first supporting layer is avoided, and the occurrence probability of the dead bending phenomenon at the bending starting point position is reduced fundamentally.

Description

Technical Field

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

[0002] With the continuous development of display terminal technology, users are increasingly demanding higher screen-to-body ratios for display devices. Flexible display modules often employ a back-folding process to narrow the bottom bezel. This involves bending the display panel's bending area towards the back in a single motion, hiding functional areas such as the driver and bonding areas on the back of the panel. This achieves an ultra-narrow bottom bezel visual effect and improves the device's screen-to-body ratio.

[0003] To further reduce the bottom bezel width and increase the screen-to-body ratio, existing technologies typically optimize the design by thinning the protective layer of the display panel and reducing the bending radius of the back-folding process. However, this method causes the stress during the bending process to be highly concentrated at the junction of the display panel and the back support layer, which can easily lead to dead bends at the edge of the support layer, resulting in vertical bright lines on the screen and seriously affecting the production yield and reliability of the display module. Summary of the Invention

[0004] This application provides a display module to improve the dead state of the display panel at the edge of the first support layer.

[0005] This application provides a display module, including: a display panel; a first support layer located on one side of the display panel, wherein one edge of the first support layer is the bending start point of the display panel; and a first protective layer located on the side of the display panel away from the first support layer. The first protective layer includes a stress concentration area and a stress dispersion area. The orthographic projection of the edge of the first support layer onto the first protective layer lies within the stress concentration area, and the stress dispersion area is located on the side of the stress concentration area away from the first support layer. The first protective layer has a first thickness in the stress concentration area and a second thickness in the stress dispersion area, wherein the second thickness is less than the first thickness.

[0006] In some embodiments, the display panel includes a display area, a bending area, and a bonding area, the bending area being located between the display area and the bonding area, and the edge of the first support layer being located at the junction of the display area and the bending area; the stress concentration area spans the display area and the bending area, and the stress dispersion area is located at least in the bending area and connected to the stress concentration area.

[0007] In some embodiments, the display panel is bent into an arc in the bending area, and the connection between the stress concentration area and the stress dispersion area is at 1 / 4 of the arc.

[0008] In some embodiments, the stress dispersion zone is located between the bending zone and the bonding zone, and the second thickness is greater than or equal to 0.

[0009] In some embodiments, when the second thickness is greater than 0, the second thickness gradually decreases in the direction from the bending area to the binding area.

[0010] In some embodiments, when the second thickness is equal to 0, the display module further includes: a second support layer located on the side of the display panel away from the first protective layer, the second support layer being located in the bonding area; and a second protective layer located in the bending area of ​​the display panel and on the surface of the display panel not covered by the first protective layer, the first support layer, and the second support layer.

[0011] In some embodiments, the stress dispersion zone is located within the bending zone, and the range of the stress dispersion zone is from 1 / 4 to 1 / 2 of the arc.

[0012] In some embodiments, the second thickness of the first protective layer first decreases and then increases from 1 / 4 to 1 / 2 of the arc.

[0013] In some embodiments, the first protective layer further includes a stress relief region, wherein the stress dispersion region is located between the stress concentration region and the stress relief region; wherein the first protective layer has a third thickness in the stress relief region, and the third thickness is greater than the second thickness.

[0014] In some embodiments, within the stress concentration area, the first thickness of the first protective layer decreases in the direction from the display area to the bending area.

[0015] In the display module of this application embodiment, the stress concentration area is located near the edge of the first support layer, that is, near the bending start point of the display panel. By dividing the first protective layer into a stress concentration area and a stress dispersion area, and designing the thickness of the stress dispersion area to be smaller than the thickness of the stress concentration area, the thickness difference provides a flexible channel for stress to be discharged during the bending process of the display panel. The concentrated stress is effectively dispersed through the smaller stress dispersion area, avoiding stress accumulation at the junction of the display panel and the first support layer, thereby reducing the probability of a dead bend at the bending start point from the root.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of a display module after bending, according to one embodiment of this application; Figure 2 This is a schematic cross-sectional view of the display module provided in some embodiments of this application before bending; Figure 3 This is a schematic cross-sectional view of the display module provided in some embodiments of this application before bending; Figure 4 yes Figure 3 The diagram shows the cross-sectional structure of the module after bending. Figure 5 This is a schematic cross-sectional view of the display module provided in some embodiments of this application before bending; Figure 6 This is a comparison diagram of SD strain at the edge of the first support layer of the display panel under different UV conditions.

[0020] Explanation of reference numerals in the attached figures: 100. Display module; 10. Display panel; 101. Display area; 102. Bending area; 103. Binding area; B. Bending start point; 20. First support layer; 30. First protective layer; 31. Stress concentration zone; 32. Stress dispersion zone; 33. Stress release zone; H1. First thickness; H2. Second thickness; H3. Third thickness; 40. Second support layer; 50. Second protective layer; 60. Polarizing film; 61. Polarizing film substrate; 62. First adhesive layer; 70. Cover plate; 71. Second adhesive layer; 80. Composite support layer. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] Please see Figure 1 , Figure 1 This is a schematic diagram of the cross-sectional structure of a display module after bending, according to one embodiment of this application.

[0023] The display panel 10 includes a display area 101, a bending area 102, and a bonding area 103. The bending area 102 is located between the display area 101 and the bonding area 103. The edge of the first support layer 20 is located at the junction of the display area 101 and the bending area 102, which serves as the bending starting point B of the display panel 10.

[0024] The protective adhesive layer UV is located on the side of the display panel 10 opposite to the first support layer 20. In order to reduce the width of the bottom bezel and increase the screen ratio, the thickness of the protective adhesive layer UV needs to be reduced. However, the thickness of the protective adhesive layer UV is uniform in different areas, which makes it impossible to effectively disperse and guide the stress generated during bending. It is difficult to solve the problem of dead bending caused by stress concentration while ensuring the narrow bezel design, which has become the core technical bottleneck for the upgrade of flexible display modules to high screen ratio.

[0025] Based on this, this application provides a display module, including: a display panel; a first support layer located on one side of the display panel, wherein one edge of the first support layer is the bending starting point of the display panel; and a first protective layer located on the side of the display panel away from the first support layer; wherein the first protective layer includes a stress concentration area and a stress dispersion area, the orthographic projection of the edge of the first support layer onto the first protective layer is located within the stress concentration area, and the stress dispersion area is located on the side of the stress concentration area away from the first support layer; the first protective layer has a first thickness in the stress concentration area, and the first protective layer has a second thickness in the stress dispersion area, wherein the second thickness is less than the first thickness.

[0026] In the display module of this application embodiment, the stress concentration area is located near the edge of the first support layer, that is, near the bending start point of the display panel. By dividing the first protective layer into a stress concentration area and a stress dispersion area, and designing the thickness of the stress dispersion area to be smaller than the thickness of the stress concentration area, the thickness difference provides a flexible channel for stress to be discharged during the bending process of the display panel. The concentrated stress is effectively dispersed through the smaller stress dispersion area, avoiding stress accumulation at the junction of the display panel and the first support layer, thereby reducing the probability of a dead bend at the bending start point from the root.

[0027] The structure of the display module provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0028] Please see Figure 2 , Figure 2 This is a cross-sectional structural diagram of a display module provided in some embodiments of this application before bending.

[0029] The display module 100 includes a display panel 10, a first support layer 20, and a first protective layer 30. The first support layer 20 is located on one side of the display panel 10, and one edge of the first support layer 20 is the bending point B of the display panel 10. The first protective layer 30 is located on the side of the display panel 10 away from the first support layer 20. The first protective layer 30 includes a stress concentration area 31 and a stress dispersion area 32. The orthographic projection of the edge of the first support layer 20 onto the first protective layer 30 lies within the stress concentration area 31, and the stress dispersion area 32 is located on the side of the stress concentration area 31 away from the first support layer 20. The first protective layer 30 has a first thickness H1 in the stress concentration area 31 and a second thickness H2 in the stress dispersion area 32, and the second thickness H2 is smaller than the first thickness H1.

[0030] The first support layer 20 is located on one side of the display panel 10, specifically attached to the non-light-emitting surface of the display panel 10. It serves as a rigid support base for the display module 100, enhancing the overall structural strength of the display panel 10 and preventing deformation or damage during bending, transportation, and use. One edge of the first support layer 20 is the bending starting point B of the display panel 10. This edge precisely corresponds to the starting position of the back-folding process of the display panel 10 and is also the core location where stress is most concentrated during bending. This is because the display panel 10 needs to bend and deform around this edge during back-folding, and all bending stress will converge and accumulate here. Therefore, the design of this edge directly determines the core area of ​​stress concentration and is a key reference point for achieving stress dispersion in this application.

[0031] The first protective layer 30 is located on the side of the display panel 10 opposite to the first support layer 20, that is, it is attached to the light-emitting surface of the display panel 10. Its core functions are twofold: first, to provide physical protection for the light-emitting surface of the display panel 10, effectively resisting external scratches, wear, and moisture erosion, preventing damage to the light-emitting surface and affecting the display effect; second, to facilitate stress distribution during bending. Through optimized design of its structure and thickness, it diverts and conducts concentrated bending stress, preventing stress accumulation at the core location and reducing the occurrence of a dead bend at the bending starting point B. The first protective layer 30 can be made of transparent and flexible protective material, which does not affect the light emission efficiency of the display panel 10 and can adapt to the bending deformation requirements of the display panel 10, balancing protective performance and flexible adaptability.

[0032] The first protective layer 30 does not employ the uniform thickness design common in existing technologies. Instead, it is divided into two functional regions—a stress concentration region 31 and a stress dispersion region 32—based on the distribution of bending stress, with a difference in thickness between the two regions. To effectively conduct stress, the first protective layer 30 has a first thickness H1 in the stress concentration region 31 and a second thickness H2 in the stress dispersion region 32, with the second thickness H2 being less than the first thickness H1. This thickness difference design is the core key to achieving flexible stress conduction.

[0033] Specifically, the stress concentration zone 31 needs to have a certain structural strength to stably bear the concentrated stress at the bending start point B. Therefore, a larger first thickness H1 is designed to ensure that it can withstand the impact of concentrated stress and avoid damage or detachment. On the other hand, the stress dispersion zone 32 needs to have good flexibility to achieve smooth stress distribution. Therefore, a smaller second thickness H2 is designed to reduce its constraint on the bending deformation of the display panel 10, so that the concentrated stress can be smoothly and orderly distributed to the entire bending zone 102 along the extension direction of the stress dispersion zone 32. This avoids stress accumulation at the junction of the edge of the first support layer 20 and the display panel 10, and fundamentally reduces the probability of a dead bend at the bending start point B.

[0034] It should be noted that the specific values ​​of the first thickness H1 and the second thickness H2 can be flexibly adjusted according to the actual size, bending radius, material properties, etc. of the display module 100, as long as the second thickness H2 is less than the first thickness H1 and the stress bearing and dispersion functions can be achieved.

[0035] The display module 100 may also have a second support layer 40, which is located on the side of the display panel 10 away from the first protective layer 30 and is located in the bonding area 103. The second support layer 40 is made of a rigid material and is used to provide rigid support for the bonding area 103.

[0036] The display module 100 may also include a polarizer 60, which is located on the side of the display panel 10 away from the first support layer 20, and the first protective layer 30 covers the polarizer 60.

[0037] The display module 100 may also include a polarizer substrate 61 and a first adhesive layer 62. The polarizer substrate 61 is located on the side of the polarizer 60 away from the display panel 10, and the first adhesive layer 62 is located between the polarizer 60 and the polarizer substrate 61.

[0038] The display module 100 may also include a cover plate 70 and a second adhesive layer 71. The cover plate 70 is located on the side of the polarizer substrate 61 away from the display panel 10, and the second adhesive layer 71 is located between the cover plate 70 and the polarizer substrate 61.

[0039] The display module 100 may further include a composite support layer 80, which is located on the side of the first support layer 20 opposite to the display panel 10. The composite support layer 80 may include a laminated structure of foam and copper foil.

[0040] In some embodiments, within the stress concentration region 31 Figure 2 From left to right (i.e., from the display area to the bending area in the following text), the first thickness H1 of the first protective layer 30 gradually decreases, forming a gradient thickness distribution. This design optimizes the thickness of the pressure concentration area, conforming to the stress distribution pattern of the stress concentration area 31. Specifically, gradually reducing the first thickness H1 allows the stress in the stress concentration area 31 to smoothly transition to the stress dispersion area 32 along the thickness gradient, avoiding stress re-concentration at the junction due to abrupt changes in thickness. Simultaneously, it enhances the flexibility of the stress concentration area 31, adapting to the deformation requirements of the bending starting point B, further improving the smoothness of stress dissipation and reducing the risk of fatal bends.

[0041] The first protective layer 30 can be formed using a coating process. Adhesive is applied starting at areas of greater thickness and flows to areas of less thickness, thus achieving the desired thickness. For example, adhesive can be applied to the edge of the polarizer 60, allowing it to adhere to the upper surface of the polarizer 60. Since the edge of the polarizer 60 is vertical, Figure 2 The left edge of the first protective layer 30 is also vertical, causing the first thickness H1 to gradually decrease from left to right.

[0042] In other embodiments, within the stress concentration region 31, the first thickness H1 of the first protective layer 30 is uniform, requiring only that the first thickness H1 is greater than the second thickness H2. However, the transition from the first thickness H1 to the second thickness H2 can be gradual, meaning the second thickness H2 of the stress dispersion region 32 can have a gradually decreasing transition portion to avoid abrupt stress changes.

[0043] In some embodiments, the display panel 10 includes three functional areas: a display area 101, a bending area 102, and a bonding area 103. These three areas are integrated and work together to realize the display and driving functions of the display module 100. The display area 101 is the core area for displaying the image and is the area directly observed by the user, requiring good display clarity and integrity. The bending area 102, located between the display area 101 and the bonding area 103, is the main deformation area when the display panel 10 is folded backwards, and also the core channel for bending stress transmission; its structure and performance directly affect the bending reliability of the display module 100. The bonding area 103 is the bonding area for functional components such as the driver chip and flexible circuit board. It is the control core of the display module 100 and needs to have sufficient structural strength to ensure stable bonding of functional components and signal transmission.

[0044] Correspondingly, the edge of the first support layer 20 is located at the junction of the display area 101 and the bending area 102. This junction is precisely the bending start point B of the display panel 10. The precise matching of the position of the bending start point B ensures that the core location of stress concentration completely coincides with the edge of the first support layer 20 and the junction of the display area 101 and the bending area 102. The stress concentration area 31 is located near the bending start point B and spans the display area 101 and the bending area 102. This design allows the stress concentration area 31 to simultaneously bear the stress at the junction of the display area 101 and the bending area 102 (bending start point B), achieving initial stress convergence and stable bearing, and preventing stress leakage or accumulation at the junction of the display area 101 and the bending area 102. The stress dispersion zone 32 is located at least in the bending zone 102 and is seamlessly connected to the stress concentration zone 31, ensuring that the stress transmitted from the stress concentration zone 31 can be effectively dispersed in the bending zone 102, avoiding stress accumulation at the junction (near the bending start point B), while ensuring that the deformation of the bending zone 102 is not hindered, thus balancing stress dispersion effect and bending flexibility.

[0045] In some embodiments, the display panel 10 is bent into an arc in the bending area 102, that is, the display panel 10 located between the first support layer 20 and the second support layer 40 is bent into an arc.

[0046] Correspondingly, the connection point between the stress concentration area and the stress dispersion area 32 is precisely set at one-quarter of the arc. One-quarter of the arc refers to a position where the distance from the bending start point B is one-quarter of the arc length, and one-quarter of the arc length is also one-quarter of the length of the display panel 10 in the bending area 102. Setting the connection point between the stress concentration area 31 and the stress dispersion area 32 at this location allows for precise diversion of bending stress, ensuring that concentrated stress enters the flexible drainage channel at the optimal position, maximizing the stress dispersion effect, and avoiding secondary stress concentration caused by improper connection location.

[0047] exist Figure 2 In this embodiment, the stress dispersion zone 32 is set starting from one-quarter of the arc, meaning that the thickness of the first protective layer 30 is significantly reduced from this position. Therefore, stress is dispersed from one-quarter of the arc to the stress dispersion zone 32. Because the bending degree of the display panel 10 itself is relatively small at one-quarter of the arc, reducing the thickness of the first protective layer 30 from this point allows the flexibility of the display panel 10 itself to share the stress from the stress concentration zone 31. If the connection between the stress concentration zone 31 and the stress dispersion zone 32 is set at the halfway point of the arc, since the bending degree of the display panel 10 itself is greatest at the halfway point, further thinning could easily lead to excessive stress concentration at the halfway point, increasing the risk of fatal bending at that point.

[0048] In some embodiments, the stress dispersion zone 32 is located within the bending zone 102, and the range of the stress dispersion zone 32 is defined as one-quarter to one-half of the arc. Within this range, the intensity of the bending stress is moderate, which can effectively disperse the stress without affecting the bending flexibility of the display panel 10 due to excessive stress dispersion.

[0049] It should be noted that the quarter point and half point of the arc refer to the positions where the distance from the starting point B of the bend is one-quarter and one-half of the arc length, respectively.

[0050] In some embodiments, from one-quarter to one-half of the arc, the second thickness H2 of the first protective layer 30 first decreases and then increases, forming a thickness distribution pattern that is thin in the middle and thick at both ends. This design is a further optimization of the thickness of the stress dispersion zone 32, combined with the stress distribution pattern of the arc bending zone 102: the stress density is high at one-quarter of the arc (the starting end of the stress dispersion zone 32), requiring a certain thickness to bear the stress; the stress is most dispersed between one-quarter and one-half, and the minimum thickness can be used to achieve maximum stress diversion; the stress gradually converges at the halfway point of the arc (the end of the stress dispersion zone 32), requiring an appropriate increase in thickness to provide support for the stress to be transmitted to subsequent areas. Therefore, the thinnest section in the middle is the core point of stress dispersion, which can achieve maximum diversion of concentrated stress. Compared with the thinnest section in the middle, the thicker sections at both ends can provide stronger structural support for the first protective layer 30, ensuring the adhesion performance between the first protective layer 30 and the display panel 10, while retaining basic physical protection capabilities to prevent the stress dispersion zone 32 from being damaged or falling off due to excessive thickness.

[0051] In one example, the minimum thickness can be located between one-half and one-quarter of the arc, which is three-eighths of the arc (with the bend starting point B as 0).

[0052] In some embodiments, the first protective layer 30 further includes a stress relief area 33 to further improve the stress transmission chain, realize a stress concentration-dispersion-release closed loop, and improve the stress dissipation effect. The stress dispersion area 32 is located between the stress concentration area 31 and the stress relief area 33. Along the arc bending direction of the display panel 10, the first protective layer 30 consists of the stress concentration area 31, the stress dispersion area 32, and the stress relief area 33 in sequence, forming a complete stress transmission chain.

[0053] The stress concentration zone 31 covers the edge (bending point B) and vicinity of the first support layer 20, and is used to accurately bear the concentrated stress at the bending point B, completing the initial convergence of stress. The stress dispersion zone 32 is used to divert and conduct the concentrated stress. The stress release zone 33 is used to smoothly release the dispersed residual stress and avoid secondary accumulation of residual stress. Correspondingly, the first protective layer 30 has a third thickness H3 in the stress release zone 33, and the third thickness H3 is greater than the second thickness H2.

[0054] In some examples, the third thickness H3 is similar to or the same as the first thickness H1 of the stress concentration area 31, forming a uniform thickness distribution. This design allows the stress relief area 33 to have sufficient structural strength and stability, which can not only smoothly release residual stress, but also provide stable physical protection for the middle and rear sections of the bending area 102 of the display panel 10, preventing damage such as panel warping and scratches, and further improving the bending reliability of the display module 100.

[0055] For example, the stress relief zone 33 and the stress concentration zone 31 can be symmetrical about the stress dispersion zone 32. That is, Figure 2 If the first thickness H1 decreases from left to right, then the third thickness H3 can also decrease from right to left, and the thickness is the same at symmetrical positions.

[0056] In other examples, depending on the position of the minimum thickness in the stress dispersion zone 32, the third thickness H3 may be less than or greater than the first thickness H1. For example, when the minimum thickness is located in the exact center of the stress dispersion zone 32 near the stress concentration zone 31, the third thickness H3 may be greater than the first thickness H1; when the minimum thickness is located in the exact center of the stress dispersion zone 32 near the stress release zone 33, the third thickness H3 may be less than the first thickness H1. It should be noted that when the first thickness H1 and the third thickness H3 are gradually changing, the comparison between the first thickness H1 and the second thickness H2 should be made at symmetrical points.

[0057] Please see Figure 3 and Figure 4 , Figure 3 This is a cross-sectional structural diagram of the display module provided in some embodiments of this application before bending. Figure 4 yes Figure 3 The diagram shows the cross-sectional structure of the module after bending.

[0058] The stress dispersion zone 32 is located between the bending zone 102 and the bonding zone 103, achieving full-area stress dissipation from the bending zone 102 to the bonding zone 103, breaking the regional limitations of stress dispersion, and further improving the range and effect of stress dispersion. The second thickness H2 is greater than or equal to zero, and the thickness design of the first protective layer 30 can be flexibly adjusted according to the narrow bezel design requirements of the display module 100 to adapt to different product specifications. When the display module 100 has lower requirements for narrow bezels, the second thickness H2 can be greater than zero, retaining the first protective layer 30 in the bonding zone 103 to ensure the protective performance of the bonding zone 103; when the display module 100 pursues an extremely narrow bezel design, the second thickness H2 can be equal to zero, eliminating the first protective layer 30 in the bonding zone 103, maximizing the compression of the bezel width, and increasing the screen-to-body ratio.

[0059] Among them, Figure 3 and Figure 4 In this embodiment, the second thickness H2 is equal to 0.

[0060] When the second thickness H2 equals 0, that is, starting from one-quarter of the arc, the first protective layer 30 is completely removed. This design can minimize the constraint of the first protective layer 30 on the bending deformation of the display panel 10, allowing the bending stress to be released completely along the flexibility of the display panel 10 itself, which is suitable for the design requirements of an ultra-narrow bottom bezel.

[0061] See Figure 4 Since the partial removal of the first protective layer 30 would cause some areas of the bonding area 103 and the bending area 102 to lose protection and support, the display module 100 also includes a second protective layer 50. The second protective layer 50 is located in the bending area 102 of the display panel 10, and on the surface of the display panel 10 not covered by the first protective layer 30, the first support layer 20, and the second support layer 40. It is made of a flexible protective material and provides physical protection for the exposed surface of the bending area 102 to prevent scratches and moisture damage during bending. At the same time, it helps to buffer bending stress, further improving the structural stability of the display module 100 and achieving a balance between ultra-narrow bezels and structural reliability.

[0062] It should be noted that the second protective layer 50 is formed by applying adhesive after bending. The material of the second protective layer 50 can be the same as or different from the material of the first protective layer 30.

[0063] Please see Figure 5 , Figure 5 This is a schematic cross-sectional view of the display module provided in some embodiments of this application before bending. Figure 4 The difference in the embodiment is that the second thickness H2 is greater than 0.

[0064] In some embodiments, when the second thickness H2 is greater than 0, the second thickness H2 gradually decreases from the bending region 102 to the bonding region 103, forming a gradient thinning thickness distribution. This design follows the law of stress transmission. The stress density in the bending region 102 is higher than that in the bonding region 103. Therefore, the second thickness H2 of the bending region 102 is relatively large, which can better absorb and divert the stress transmitted from the stress concentration region 31. As it extends towards the bonding region 103, the stress gradually disperses and weakens. Correspondingly, the second thickness H2 is gradually reduced. This ensures that the stress is smoothly guided to the bonding region 103 along the thickness gradient, avoiding secondary concentration caused by stress abrupt changes. At the same time, it retains the basic protective thickness in the bonding region 103, ensuring the physical protection and adhesive support performance of the bonding region 103, and preventing the functional components of the bonding region 103 from being damaged due to lack of protection.

[0065] Please see Figure 6 , Figure 6 This is a comparison diagram of SD strain at the edge of the first support layer of the display panel under different UV conditions.

[0066] Figure 6 It includes a comparison of three UV modes, with normal being... Figure 1 The example uses a uniform and evenly thick UV morphology (control group), where UV morphology 1 is... Figure 2 The first protective layer 30 in the embodiment has a UV morphology 2. Figure 3 In the embodiment, the first protective layer 30 is compared with the SD strain peak value at the edge of the first support layer 20.

[0067] Depend on Figure 6 It can be seen that in the control group (uniform and equal thickness UV morphology), the SD strain peak value at the edge of the first support layer 20 is extremely high; Figure 2 In this embodiment, the peak SD strain at the edge of the first support layer 20 is significantly lower than that of the control group; Figure 3 In the embodiment, the peak SD strain at the edge of the first support layer 20 is compared to Figure 2 The implementation examples further reduce costs.

[0068] Therefore, compared with the existing technology of uniform thickness UV adhesive, this application can effectively reduce the peak value of SD strain at the edge of the first support layer 20 and optimize the strain distribution by optimizing the UV morphology (corresponding to the partition and thickness design of the first protective layer 30), thereby reducing the occurrence of dead fold phenomenon at the edge of the first support layer 20 from the root, while taking into account the narrow frame design and structural stability.

[0069] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module (100), characterized in that, include: Display panel (10); The first support layer (20) is located on one side of the display panel (10), and one side edge of the first support layer (20) is the bending start point (B) of the display panel (10). The first protective layer (30) is located on the side of the display panel (10) opposite to the first support layer (20); The first protective layer (30) includes a stress concentration area (31) and a stress dispersion area (32). The orthographic projection of the edge of the first support layer (20) onto the first protective layer (30) is located within the stress concentration area (31), and the stress dispersion area (32) is located on the side of the stress concentration area (31) away from the first support layer (20). The first protective layer (30) has a first thickness (H1) in the stress concentration area (31) and a second thickness (H2) in the stress dispersion area (32), and the second thickness (H2) is less than the first thickness (H1).

2. The display module (100) according to claim 1, characterized in that, The display panel (10) includes a display area (101), a bending area (102) and a bonding area (103). The bending area (102) is located between the display area (101) and the bonding area (103). The edge of the first support layer (20) is located at the junction of the display area (101) and the bending area (102). The stress concentration area (31) spans the display area (101) and the bending area (102), and the stress dispersion area (32) is located at least in the bending area (102) and connected to the stress concentration area (31).

3. The display module (100) according to claim 2, characterized in that, The display panel (10) is bent into an arc in the bending area (102), and the connection between the stress concentration area (31) and the stress dispersion area (32) is at 1 / 4 of the arc.

4. The display module (100) according to claim 3, characterized in that, The stress dispersion zone (32) is located in the bending zone (102) and the binding zone (103), and the second thickness (H2) is greater than or equal to 0.

5. The display module (100) according to claim 4, characterized in that, When the second thickness (H2) is greater than 0, the second thickness (H2) gradually decreases in the direction from the bending area (102) to the binding area (103).

6. The display module (100) according to claim 4, characterized in that, When the second thickness (H2) is equal to 0, the display module (100) further includes: The second support layer (40) is located on the side of the display panel (10) away from the first protective layer (30), and the second support layer (40) is located in the bonding area (103). The second protective layer (50) is located in the bending area (102) of the display panel (10) and on the surface of the display panel (10) not covered by the first protective layer (30), the first support layer (20) and the second support layer (40).

7. The display module (100) according to claim 3, characterized in that, The stress dispersion zone (32) is located within the bending zone (102), and the range of the stress dispersion zone (32) is from 1 / 4 to 1 / 2 of the arc.

8. The display module (100) according to claim 7, characterized in that, From 1 / 4 to 1 / 2 of the arc, the second thickness (H2) of the first protective layer (30) first decreases and then increases.

9. The display module (100) according to claim 8, characterized in that, The first protective layer (30) further includes: The stress relief zone (33) and the stress dispersion zone (32) are located between the stress concentration zone (31) and the stress relief zone (33); The first protective layer (30) has a third thickness (H3) in the stress relief area (33), and the third thickness (H3) is greater than the second thickness (H2).

10. The display module (100) according to claim 2, characterized in that, Within the stress concentration area (31), the first thickness (H1) of the first protective layer (30) decreases in the direction from the display area (101) to the bending area (102).

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