Display device

Abstract

Embodiments of the present application provide a display device, and relate to the technical field of display, and aim to alleviate the problem that a polaroid has a large stress concentration degree on a side close to a connecting adhesive layer in the related art. The display device comprises a display panel and a polaroid. The display panel has a display area and a bending area adjacent to the display area. The display panel comprises a bending part in the bending area, and an adhesive layer is arranged on the bending part. The polaroid comprises a first side surface connected with the adhesive layer. A groove is arranged on the polaroid. The groove is located in the bending area, and an edge of the groove close to the first side surface is arranged to be spaced from the first side surface.

Description

Technical Field

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

[0002] OLED display devices typically include a display panel and a polarizer located on the light-emitting side of the display panel. The display panel has a display part, a bending part, and a bonding part. The bending part is bent so that the bonding part is located on the back side of the display panel, thereby increasing the screen-to-body ratio of the OLED display device.

[0003] An adhesive layer is typically applied to the bent portion of a display panel, bonding it to the polarizer. However, during bending or when an OLED display is dropped, a boundary effect occurs at the bent portion of the panel, causing significant stress concentration on the side of the polarizer near the adhesive layer. This can lead to peeling between the polarizer and the adhesive layer, and even increase the risk of cracking in the film layer near the polarizer. Summary of the Invention

[0004] Embodiments of this application provide a display device designed to alleviate the problem in related technologies where polarizers have a high stress concentration on the side near their adhesive layer.

[0005] On one hand, embodiments of this application provide a display device, which includes a display panel and a polarizer. The display panel has a display area and a bent area adjacent to the display area. The display panel includes a bent portion located within the bent area, and an adhesive layer is provided on the bent portion. The polarizer includes a first side surface, which is connected to the adhesive layer. A groove is formed on the polarizer, which is located corresponding to the bent area, and the first edge of the groove near the first side surface is spaced apart from the first side surface.

[0006] In some embodiments, the display panel includes a light-emitting device layer, an encapsulation layer, and a touch layer. The encapsulation layer covers the light-emitting device layer, and the touch layer is located on top of the encapsulation layer. The touch layer is bonded to the adhesive layer. The encapsulation layer includes a main body portion and an edge portion connected to the main body portion. The surface of the main body portion near the touch layer is planar, and the surface of the edge portion near the touch layer is curved. Along the thickness direction of the display device, the orthographic projection of the first edge of the groove near the first side side on the encapsulation layer is located within the area of ​​the main body portion.

[0007] In some embodiments, the groove is disposed on the side of the polarizer near the display panel.

[0008] In some embodiments, the groove is filled with transparent optical adhesive.

[0009] In some embodiments, along the length direction of the groove, the width of the groove at both ends is greater than the width of the groove at the middle, and the length direction of the groove is the same as the extension direction of the first side surface.

[0010] In some embodiments, the first edge of the groove near the first side includes a first arcuate segment, the first arcuate segment protruding toward the second edge of the groove away from the first side, and the first arcuate segment being located at the middle of the first edge.

[0011] In some embodiments, the second edge of the groove away from the first side includes a second arcuate segment, the second arcuate segment protruding toward the first edge of the groove near the first side, and the second arcuate segment being located at the middle of the second edge.

[0012] In some embodiments, the side of the bend away from the adhesive layer is further provided with a buffer portion, which fills the space enclosed by the first back plate, the bend, the second back plate, and the buffer layer.

[0013] In some embodiments, the minimum distance D1 between the edge of the groove near the first side and the first side and the thickness M of the polarizer satisfy the following relationship: D1≥2M.

[0014] In some embodiments, the maximum distance D2 between the edge of the groove away from the first side and the first side, and the thickness M of the polarizer, satisfy the following relationship: D2≤4M.

[0015] In some embodiments, the dimension D3 of the groove in the direction perpendicular to the first side and the thickness M of the polarizer satisfy the following relationship: 2M≥D3≥M.

[0016] In some embodiments, the depth H of the groove and the thickness M of the polarizer satisfy the following relationship: 2 / 3M≥H≥1 / 3M.

[0017] In some embodiments, the groove includes a plurality of sub-grooves of equal width, the length direction of the sub-grooves being parallel to the first side surface, the length direction of the sub-grooves being perpendicular to the width direction of the sub-grooves, and the distance between the same side edge of the plurality of sub-grooves and the first side surface being equal in the width direction of the sub-grooves.

[0018] In some embodiments, the spacing D4 between two adjacent sub-grooves and the thickness M of the polarizer satisfy the following relationship: M≥D4≥1 / 2M.

[0019] In the display device provided in the embodiments of this application, since the polarizer has a groove near the first side, the groove deforms under the action of external force, thereby effectively buffering and releasing the stress concentration caused by the boundary effect, and thus avoiding problems such as the polarizer falling off from the adhesive layer due to excessive stress concentration on the first side of the polarizer. Attached Figure Description

[0020] Figure 1 This is a structural diagram of a display device in related technologies;

[0021] Figure 2 This is a structural diagram of a display device provided in some embodiments of this application;

[0022] Figure 3 These are structural diagrams of display devices provided in other embodiments of this application;

[0023] Figure 4 These are structural diagrams of a display device provided in some further embodiments of this application;

[0024] Figure 5 These are structural diagrams of the polarizer in a display device provided in some embodiments of this application;

[0025] Figure 6 This is a structural diagram of the polarizer in a display device provided in some other embodiments of this application;

[0026] Figure 7 This is a structural diagram of the polarizer in a display device provided in some other embodiments of this application;

[0027] Figure 8A It is a stress cloud diagram of a polarizer in related technologies;

[0028] Figure 8B yes Figure 8A Normal stress contour plot of the mid-end interface;

[0029] Figure 9A These are stress cloud diagrams of polarizers in display devices provided in some embodiments of this application;

[0030] Figure 9B yes Figure 9A Normal stress contour plot of the mid-end interface. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words mean two or more, unless otherwise expressly defined.

[0033] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0034] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0035] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application.

[0036] The various embodiments of this application are similar, and features from different embodiments and / or different examples can be combined with each other.

[0037] In related technologies, such as Figure 1 As shown, an OLED display device typically includes a display panel 10 and a polarizer 20 located on the light-emitting side of the display panel 10. The display panel 10 has a display portion 101, a bending portion 102, and a bonding portion 103. The bending portion 102 is bent so that the bonding portion 103 is located on the back side of the display panel 10, thereby increasing the screen-to-body ratio of the OLED display device.

[0038] An adhesive layer 30 is typically provided on the bent portion 102 of the display panel 10, which bonds the adhesive layer 30 to the polarizer 20. However, during the bending process of the bent portion 102 of the display panel 10 or during the drop of the OLED display device, a boundary effect occurs, which causes a large stress concentration at the end 201 of the polarizer 20 near the adhesive layer 30. This can lead to the polarizer 20 peeling off from the adhesive layer 30, and may even increase the risk of cracking of the film layer near the polarizer 20.

[0039] Based on this, some embodiments of this application provide a display device, such as... Figure 2As shown, the display device 100 includes a display panel 10 and a polarizer 21. The display panel 10 has a display area AA and a bending area BA adjacent to the display area AA, the bending area BA being located on one side of the display area AA; the display panel 10 includes a bending portion 102 located within the bending area BA, and an adhesive layer 30 is provided on the bending portion 102.

[0040] The polarizer 21 includes a first side surface 211, which is connected to the adhesive layer 30 located on the bending portion 102. A groove 210 is formed on the polarizer 21. The groove 210 is located within the bending area BA, that is, along the thickness direction of the display device 100, the groove 210 is located within the bending area BA of the display panel 10.

[0041] The first edge of the groove 210 near the first side 211 is spaced apart from the first side 211, that is, there is a certain distance between the first edge of the groove 210 near the first side 211 and the first side 211.

[0042] Since the polarizer 21 has a groove 210 near its first side 211, the groove 210 can deform under the action of external force, thereby effectively buffering and releasing the stress concentration caused by the boundary effect, and thus avoiding problems such as the polarizer 20 falling off from the adhesive layer 30 due to excessive stress concentration on the first side 211 of the polarizer 21.

[0043] Therefore, the display device provided in the embodiments of this application can effectively release the stress at the first side 211 through the design of the polarizer 21, thereby avoiding the boundary effect caused by the bending of the bending portion 102 of the display panel 10 during the assembly process of the display device, and preventing damage to the connection between the polarizer 21 and the adhesive layer 30; at the same time, it can also prevent the boundary effect caused by the display device being dropped during use, and prevent damage to the connection between the polarizer 21 and the adhesive layer 30.

[0044] In some embodiments, such as Figures 2 to 4 As shown, the groove 210 is disposed on the side of the polarizer 21 near the display panel 10. This arrangement allows the groove 210 to effectively alleviate and release the forces acting on the polarizer 21, thereby effectively reducing the risk of peeling between the polarizer 21 and the adhesive layer 30.

[0045] In some embodiments, a transparent optical adhesive is provided in the groove 210. The transparent optical adhesive is adhesive and can bond the polarizer 21 to the sidewalls located in the groove 210; moreover, the transparent optical adhesive can undergo elastic deformation, thus effectively buffering and releasing the forces exerted on the polarizer 21. This improves the buffering and release effect of the aforementioned forces and also helps to ensure the structural strength of the polarizer 21 at the location of the groove 210.

[0046] In some examples, transparent optical adhesive fills the groove 210.

[0047] In some embodiments, such as Figure 3 As shown, the display panel 10 includes a light-emitting device layer 11, an encapsulation layer 12, and a touch layer 13. The encapsulation layer 12 covers the light-emitting device layer 11, and the touch layer 13 is located on the encapsulation layer 12. The touch layer 13 is bonded to the adhesive layer 30.

[0048] The encapsulation layer 12 includes a main body 121 and an edge portion 122 connected to the main body 121. The surface of the main body 121 near the touch layer 13 is planar, and the surface of the edge portion 122 near the touch layer 13 is curved. Along the thickness direction of the display device 100, the orthographic projection of the first edge of the recess 210 near the first side surface 211 onto the encapsulation layer 12 lies within the area of ​​the main body 121. In this case, the recess 210 is correspondingly located within the area of ​​the main body 121.

[0049] It is worth noting that the edge of the encapsulation layer 12 typically has a self-leveling structure, and the edge portion 122 of the encapsulation layer 12 forms a step. Along the direction away from the main body portion 121, the thickness of the edge portion 122 gradually decreases, resulting in a curved surface on the side of the edge portion 122 near the touch layer 13. This often results in a gap between the encapsulation layer 12 and the adhesive layer 30. At this gap location, the film of the display device 100 is relatively fragile, easily leading to peeling or detachment of the surrounding film layers, thus affecting the structural stability of the polarizer 21 at the groove 210 position. Furthermore, the presence of the gap can easily disrupt the buffering and release function of the groove 210 on the polarizer 21. Therefore, arranging the groove 210 within the area corresponding to the main body portion 121 ensures the structural stability of the polarizer 21 and effectively buffers and releases the forces exerted on the polarizer 21 by the groove 210.

[0050] In some embodiments, such as Figure 3As shown, the thickness N of the encapsulation layer 12 and the thickness M of the polarizer 21 satisfy the following relationship: M ≥ N. With this configuration, the polarizer 21 has a larger thickness relative to the encapsulation layer 12, which helps to reduce the impact of the gap between the encapsulation layer 12 and the adhesive layer 30, while improving the buffering and release effect of the groove 210 in the polarizer 21 on the forces exerted on the polarizer 21.

[0051] In some examples, N can be M, 0.8M, 0.6M, 0.5M, etc.

[0052] In some embodiments, such as Figure 4 As shown, the display device 100 also includes a first back plate 41 and a second back plate 42, and the display panel 10 also includes display sections 101 and mounting sections 103 located on both sides of the bending portion 102. The display section 101 can be located in the display area AA, and the mounting section 103 can be located in the bending area BA. After the bending portion 102 is bent, the mounting section 103 is located below the display section 101. The display section 101 is used to realize the display function of the display panel 10, while the mounting section 103 is used for wiring connection, so that external signals can be transmitted to the display section 101 and drive the display section 101 to display. The first back plate 41 is located below the display section 101 (i.e., the display section 101), and the second back plate 42 is located on the side of the mounting section 103 closer to the display section 101. This provides good support and load-bearing for the display panel 10.

[0053] In some examples, the display device 100 also includes a buffer layer 44 located between the first back plate 41 and the second back plate 42. The buffer layer 44 can act as a buffer to help mitigate damage to the electronic components of the display device 100 after an impact. For example, the material of the buffer layer 44 may include foam.

[0054] In some embodiments, such as Figure 4 As shown, the side of the bent portion 102 away from the adhesive layer 30 is also provided with a buffer portion 40, which fills the space enclosed by the first back plate 41, the bent portion 102, the second back plate 42 and the buffer layer 44.

[0055] By providing a buffer section 40, the vibration caused by the display device 100 during drop or transportation can be effectively mitigated, thereby reducing the risk of film breakage in the bending section 102 and its vicinity.

[0056] In some examples, the material of the buffer portion 40 includes hot melt adhesive. For example, the buffer portion 40 may be made of hot melt adhesive material.

[0057] In some examples, the display device 100 also includes a heat dissipation film 43 located between the first back plate 41 and the buffer layer 44, which can improve the heat dissipation performance of the display device 100.

[0058] In this case, the buffer portion 40 fills the space enclosed by the first back plate 41, the bent portion 102, the second back plate 42, the buffer layer 44, and the heat dissipation film 43.

[0059] In some embodiments, such as Figure 4 As shown, the display panel 10 also has a driver chip 104 at the bonding part 103. The end of the bonding part 103 away from the bending part 102 is connected to a flexible circuit board 105, through which signal input can be realized. Furthermore, the driver chip 104 can process the signal input from the flexible circuit board 105 and convert it into a driving signal to drive the display part 101 for display.

[0060] In some examples, a glass cover plate 46 may be provided on the side of the polarizer 21 away from the display panel 10, so as to provide good protection for the display panel 10 and components such as the polarizer 21.

[0061] For example, an adhesive layer 45 is provided between the glass cover plate 46 and the polarizer 21, which can be used to achieve a stable connection and fixation between the glass cover plate 46 and the polarizer 21. For example, the material of the adhesive layer 45 can be a transparent optical adhesive.

[0062] In some embodiments, such as Figure 2 and Figure 5 As shown, the first edge of the groove 210 near the first side surface 211 has a minimum distance D1 between it and the first side surface 211. The polarizer 21 has a thickness M. The minimum distance D1 and the thickness M satisfy the following relationship: D1≥M.

[0063] By opening the groove 210 within the corresponding bending area BA and ensuring that the minimum distance D1 from the first side surface 211 is greater than or equal to the thickness of the polarizer 21, the problem of the polarizer 21 being easily broken due to the groove 210 being too close to the first side surface 211 can be effectively mitigated, thus preventing subsequent use.

[0064] In some embodiments, such as Figure 2 and Figure 5 As shown, the second edge of the groove 210 away from the first side surface 211 has a maximum distance D2 between it and the first side surface 211. The maximum distance D2 and the thickness M satisfy the following relationship: D2≤5M.

[0065] By opening the groove 210 within the corresponding bending area BA and ensuring that the maximum distance D2 from the first side surface 211 is less than or equal to five times the thickness of the polarizer 21, it is possible to avoid the groove 210 being too far from the first side surface 211, which would prevent the groove 210 from effectively buffering and releasing the stress concentration on the first side surface 211.

[0066] In some examples, the minimum distance D1 mentioned above can be equal to M, 1.5M, etc., and the maximum distance D2 mentioned above can be equal to 4.5M, 5M, etc.

[0067] In some embodiments, the minimum distance D1, the maximum distance D2, and the thickness M satisfy the following relationship: D1≥2M and D2≤4M.

[0068] In this case, the distance between the groove 210 and the first side surface 211 is set reasonably. On the one hand, it helps to overcome the possibility of the first side surface 211 of the polarizer 21 breaking when subjected to a greater force than the bending of the bending portion 102 and the drop of the display device. On the other hand, it also helps the groove 210 to more effectively buffer and release the force on the polarizer 21.

[0069] In some embodiments, such as Figure 2 and Figure 5 As shown, the dimension D3 of the groove 210 on its perpendicular side 211 and the thickness M of the polarizer 21 satisfy the following relationship: 2M≥D3≥M.

[0070] For example, such as Figure 2 and Figure 5 As shown, the second side 212 of the groove 210 on the polarizer 21 intersects the first side 211 at a side edge 213, and this side edge 213 extends along the first direction X. The second direction Y is defined on the plane of the polarizer 21 and perpendicular to the first direction X. Both the first direction X and the second direction Y are perpendicular to the thickness direction of the polarizer 21. The dimension of the groove 210 in the second direction Y is D3, that is, the width of the groove 210 is D3. In this case, 2M ≥ D3 ≥ M.

[0071] With this configuration, the width of the groove 210 is greater than or equal to the thickness M of the polarizer 21, and less than or equal to twice the thickness M of the polarizer 21. This avoids the problem that the groove 210 is too narrow, resulting in poor buffering and release of the force applied to the polarizer 21, while also preventing the groove 210 from being too wide, which could easily cause it to break or fracture under strong forces.

[0072] In some examples, the dimension D3 of the polarizer 21 perpendicular to the first side 211 can be equal to M, 1.5M, 2M, or any other value in the range of M to 2M.

[0073] In some embodiments, such as Figure 2As shown, the depth of the groove 210 is H, that is, the dimension of the groove 210 in the thickness direction of the polarizer 21 is H. The depth H of the groove 210 and the thickness M of the polarizer 21 satisfy the following relationship: 2 / 3M≥H≥1 / 3M, that is, the depth H of the groove 210 is greater than or equal to 1 / 3 of the thickness M of the polarizer 21, and less than or equal to 2 / 3 of the thickness M of the polarizer 21.

[0074] Therefore, by setting the groove 210 to have a large depth, on the one hand, it is beneficial to buffer and release the force on the polarizer 21 through the groove 210; on the other hand, it can also avoid the problem that the polarizer 21 is prone to breakage at the groove 210 position due to the excessive depth of the groove 210 causing the polarizer 21 to be too thin at the groove 210 position.

[0075] In some examples, the depth H of the groove 210 can be equal to 1 / 3M, 1 / 2M, 2 / 3M, or any other value in the range of 1 / 3M to 2 / 3M.

[0076] In some embodiments, such as Figure 5 As shown, the cross-section of the groove 210 in the plane direction of the polarizer 21 can be a regular pattern. For example, the cross-section of the groove 210 in the plane direction of the polarizer 21 can be rectangular. The long side of the groove 210 can be parallel to the long side of the polarizer 21, and the short side of the groove 210 can be parallel to the short side of the polarizer 21.

[0077] In some examples, the depth of each position within the groove 210 can be the same. This is beneficial for the fabrication of the groove 210 and also helps to improve the uniformity of the groove 210, enabling it to effectively buffer and release the force exerted on the polarizer 21.

[0078] In some embodiments, such as Figure 5 As shown, the groove 210 can extend along the first direction X. The dimension of the groove 210 in the first direction X (i.e., the length of the groove 210) is smaller than the dimension of the first side surface 211 in the first direction X.

[0079] In some examples, the groove 210 may be positioned at the center of the polarizer 21 in the first direction X. In this case, the midpoint of the groove 210 in the first direction X coincides with the midpoint of the polarizer 21 in the first direction X, which helps to ensure the structural stability of the polarizer 21 and also helps to ensure the effect of the groove 210 in buffering and releasing the forces applied to the polarizer 21.

[0080] In some embodiments, such as Figure 6As shown, along the length of the groove 210, the width of the groove 210 at both ends is greater than the width of the groove 210 at the middle. The length direction of the groove 210 is the same as the extension direction of the first side surface 211, that is, the length direction of the groove 210 is the same as the extension direction of the upper side edge 213 of the first side surface 211.

[0081] Figure 6 The diagram only shows the width of one end of the groove 210 as D31, and the width of the middle part of the groove 210 as D32, where D31 is greater than D32. It is worth noting that the width of the other end of the groove 210 is also greater than the width D32 of the middle part of the groove 210.

[0082] Due to the edge effect, the stress is concentrated at both ends of the groove 210, making it prone to breakage. By setting the width of the two ends of the groove 210 to be relatively large, the stress concentration at the two ends of the groove 210 can be reduced, mitigating the risk of breakage at the edge of the groove 210 and effectively preventing the polarizer from breaking at the location of the groove 210.

[0083] In some embodiments, such as Figure 6 As shown, the first edge 2101 of the groove 210 near the first side 211 includes a first arc segment 21011. The first arc segment 21011 protrudes toward the second edge 2102 of the groove 210 away from the first side 211. The first arc segment 21011 is located at the middle of the first edge 2101.

[0084] This design allows the groove 210 to transition smoothly at the first edge 2101. Furthermore, the first arc-shaped segment 21011 protrudes towards the second edge 2102 of the groove 210, away from the first side 211, ensuring that the center of curvature of the first arc-shaped segment 21011 is located on the side away from the second edge 2102. This not only ensures that the width of the middle part of the groove 210 is less than the width of both ends, but also improves the structural stability of the groove 210.

[0085] In some examples, the first edge 2101 also includes straight segments located on both sides of the first arcuate segment 21011 and connected to the first arcuate segment 21011.

[0086] In some embodiments, such as Figure 6 As shown, the second edge 2102 of the groove 210 away from the first side 211 includes a second arc-shaped segment 21021. The second arc-shaped segment 21021 protrudes toward the first edge 2101 of the groove 210 near the first side 211, and the second arc-shaped segment 21021 is located at the middle of the second edge 2102.

[0087] This design allows the groove 210 to transition smoothly at the first edge 2101. Furthermore, the second arc-shaped segment 21021 protrudes towards the first edge 2101 of the groove 210 near the first side 211, ensuring that the center of curvature of the second arc-shaped segment 21021 is located on the side furthest from the first edge 2101. This not only ensures that the width of the middle part of the groove 210 is less than the widths at both ends, but also improves the structural stability of the groove 210.

[0088] In some examples, the second edge 2102 also includes straight segments located on both sides of the second arcuate segment 21021 and connected to the second arcuate segment 21021.

[0089] It is worth noting that the above embodiments of this application are described using the first edge 2101 and the second edge 2102 of the groove 210 at the opening position. In reality, during the opening process of the groove 210, it is opened in a direction perpendicular to the surface of the polarizer 21. Therefore, the shape and size of the opening area of ​​the groove 210 are the same as those of the bottom area of ​​the groove 210.

[0090] In some embodiments, the groove 210 may include sub-grooves. In this case, the first edge of the groove 210 near the first side surface 211 is the edge of the sub-grooves 2100 closest to the first side surface 211 among the plurality of sub-grooves 2100; the second edge of the groove 210 away from the first side surface 211 is the edge of the sub-grooves 2100 furthest from the first side surface 211 among the plurality of sub-grooves 2100.

[0091] In some embodiments, such as Figure 7 As shown, the groove 210 includes a plurality of sub-grooves 2100 of equal width. The length direction (i.e., the first direction X) of each sub-grooves 2100 is parallel to the first side surface 211, and the width direction (i.e., the second direction Y) of the sub-grooves 2100 is perpendicular to the length direction of the sub-grooves 2100. In the width direction of the sub-grooves 2100, the distance between the same edge of the plurality of sub-grooves 2100 and the first side surface 211 is equal.

[0092] In this case, multiple sub-grooves 2100 can be spaced apart along the first direction X. By setting multiple mutually spaced sub-grooves 2100, on the one hand, it is beneficial to ensure the structural stability of the polarizer 21, thereby reducing the risk of the polarizer 21 breaking at the sub-grooves 2100; on the other hand, by increasing the number of sub-grooves 2100, the effect of buffering and releasing the force on the polarizer 21 is improved.

[0093] For example, each sub-groove 2100 has a rectangular cross-section in the plane direction of the polarizer 21. The distance between the edge of each sub-groove 2100 on the side closest to the first side surface 211 and the first side surface 211 is equal, and the distance between the edge of each sub-groove 2100 on the side furthest from the first side surface 211 and the first side surface 211 is also equal.

[0094] In some embodiments, such as Figure 7 As shown, the distance D4 between two adjacent sub-grooves 2100 and the thickness M of the polarizer 21 satisfy the following relationship: M ≥ D4 ≥ 1 / 2 M. That is, the ratio of the distance D4 between two adjacent sub-grooves 2100 to the thickness M of the polarizer is greater than or equal to 1 / 2 and less than or equal to 1.

[0095] This design ensures that the distance D4 between two adjacent sub-grooves 2100 is within a relatively reasonable range. On the one hand, it avoids the distance D4 between two adjacent sub-grooves 2100 being too large, which would affect the effect of the sub-grooves 2100 in buffering and releasing the force exerted on the polarizer 21. On the other hand, it also avoids the problem that the distance D4 between two adjacent sub-grooves 2100 is too small, which would make the polarizer 21 relatively fragile at the part between the two sub-grooves 2100, prone to cracking and affecting the structural stability of the polarizer 21.

[0096] In some examples, multiple sub-grooves 2100 are equally spaced. This helps to improve the effect of the grooves 210 in buffering and releasing the forces exerted on the polarizer 21.

[0097] In some examples, the sub-groove 2100 located at the center in the first direction X can be disposed at the center of the polarizer 21. In this case, the midpoint of the sub-groove 2100 in the first direction X coincides with the midpoint of the polarizer 21 in the first direction X. This helps to ensure the structural stability of the polarizer 21, and also helps to ensure the effect of the sub-groove 2100 in buffering and releasing the forces applied to the polarizer 21.

[0098] Regarding the polarizer 20 in related technologies and the polarizer 21 provided in the above embodiments of this application, after applying them to a display device, the inventors simulated the stress of the polarizer 20 and the polarizer 21, and obtained the following results: Figures 8A to 9B The stress cloud diagram. Among them, Figure 8A This is a stress contour plot of the end of the polarizer 20 near the adhesive layer 30. Figure 8B for Figure 8A Normal stress contour plot of the mid-end interface; Figure 9A This is a stress contour plot of the end of the polarizer 21 near the adhesive layer 30 (i.e., the first side surface 211). Figure 9B for Figure 9ANormal stress contour plot of the mid-end interface (i.e., the first side surface 211). Figures 8A to 9B It can be seen that the maximum normal stress at the interface of the polarizer 20 near the adhesive layer 30 in the related technology is 8.089e+00, while the maximum normal stress of the polarizer 21 on the first side 211 provided in the above embodiment of this application is 6.918e+00. This reduces the maximum normal stress of the polarizer 21 by approximately 14.5% compared to the polarizer 20. Therefore, by providing a groove 210 at the position of the polarizer 21 near the first side 211, it is beneficial to reduce the normal stress at the interface of the polarizer 21 connected to the adhesive layer 30, thereby improving the mechanical properties of the bending portion 102 of the display panel 10 and enhancing the static stability of the display device. In addition, due to the reduction of normal stress, the risk of peeling between the polarizer 20 and the adhesive layer 30 can also be effectively reduced.

[0099] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display device, characterized in that, include: A display panel having a display area and a bent area adjacent to the display area, the display panel including a bent portion located within the bent area, the bent portion having an adhesive layer; and A polarizer includes a first side surface connected to the adhesive layer; a groove is formed on the polarizer, the groove is located within the bending area, and the first edge of the groove near the first side surface is spaced apart from the first side surface, the groove being disposed on the side surface of the polarizer near the display panel.

2. The display device according to claim 1, characterized in that, The display panel includes a light-emitting device layer, an encapsulation layer, and a touch layer. The encapsulation layer covers the light-emitting device layer, and the touch layer is located on top of the encapsulation layer. The touch layer is bonded to the adhesive layer. The encapsulation layer includes a main body portion and an edge portion connected to the main body portion. The surface of the main body portion near the touch layer is planar, and the surface of the edge portion near the touch layer is curved. Along the thickness direction of the display device, the orthographic projection of the first edge of the groove near the first side side on the encapsulation layer is located within the area of ​​the main body portion.

3. The display device according to claim 1, characterized in that, The groove is filled with transparent optical adhesive.

4. The display device according to any one of claims 1-3, characterized in that, Along the length of the groove, the width of the groove at both ends is greater than the width of the groove at the middle, and the length of the groove is the same as the extension direction of the first side.

5. The display device according to claim 4, characterized in that, The groove includes a first arc-shaped segment near the first side edge, the first arc-shaped segment protruding towards the second edge of the groove away from the first side edge, and the first arc-shaped segment being located at the middle of the first edge; and / or The second edge of the groove away from the first side includes a second arc-shaped segment, which protrudes toward the first edge of the groove near the first side and is located at the middle of the second edge.

6. The display device according to any one of claims 1-3, characterized in that, The minimum distance D1 between the first edge of the groove near the first side and the first side, and the thickness M of the polarizer, satisfy the following relationship: D1 ≥ 2M; and / or The maximum distance D2 between the second edge of the groove away from the first side and the first side, and the thickness M of the polarizer, satisfy the following relationship: D2≤4M.

7. The display device according to any one of claims 1-3, characterized in that, The dimension D3 of the groove in the direction perpendicular to the first side surface and the thickness M of the polarizer satisfy the following relationship: 2M≥D3≥M; and / or The depth H of the groove and the thickness M of the polarizer satisfy the following relationship: 2 / 3M≥H≥1 / 3M.

8. The display device according to any one of claims 1-3, characterized in that, The groove includes multiple sub-grooves of equal width. The length direction of the sub-grooves is parallel to the first side surface, and the length direction of the sub-grooves is perpendicular to the width direction of the sub-grooves. In the width direction of the sub-grooves, the distance between the same side edge of the multiple sub-grooves and the first side surface is equal.

9. The display device according to claim 8, characterized in that, The distance D4 between two adjacent sub-grooves and the thickness M of the polarizer satisfy the following relationship: M≥D4≥1 / 2M.

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