Display module and display device

Abstract

The invention discloses a display module and a display device, belongs to the technical field of display, and aims to solve the problem that a protective adhesive layer and a polaroid of a display module in the prior art are easy to peel off. The display module comprises a display panel, a back plate and a polaroid which are located on the two opposite sides of a main body part of the display panel, and a protection adhesive layer covering a bent part of the display panel. The display panel comprises a packaging layer, a first inorganic packaging layer and a second inorganic packaging layer included in the packaging layer are in contact in an effective packaging area and form an overlapped packaging piece, and the flat layer is located in a bending transition area and provided with a recess on one side close to the effective packaging area. The distance between the orthographic projection of the overlapping packaging piece on the back plate and the orthographic projection of the recess on the back plate is D0, and the distance between the polarizer and the edge of the same side of the back plate is D1,

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) display panels typically include a main body for display and a bending portion and a bonding portion located on one side of the main body. By bending the bending portion, the bonding portion is moved to the back side of the display panel, thus enabling a narrow bezel design for the display panel.

[0003] Currently, the main body has a backplate and a polarizer on its upper and lower sides, respectively. The main body also has an effective encapsulation area near the bending section, where a protective adhesive layer is applied, connecting to the side of the polarizer. For the display module used in this display panel, the proximity of the effective encapsulation area to the edge of the backplate causes significant stress during bending, which is applied to the connection between the protective adhesive layer and the polarizer, leading to peeling between them. Therefore, display modules in related technologies are prone to peeling between the protective adhesive layer and the polarizer. Summary of the Invention

[0004] This application provides a display module and display device to at least improve the technical problem in the related art where the protective adhesive layer and the polarizer in the display module are prone to peeling.

[0005] Some embodiments of this application provide a display module, including: A display panel includes a main body and a bent portion located on one side of the main body. The main body has a display area, a barrier area located outside the display area, an effective encapsulation area located outside the barrier area, and a bent transition area located outside the effective encapsulation area. The main body includes a light-emitting device layer and an encapsulation layer located on the light-emitting device layer. The light-emitting device layer is located within the display area. The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially. The organic encapsulation layer is located inside the barrier area. The first encapsulation portion of the first inorganic encapsulation layer and the second encapsulation portion of the second inorganic encapsulation layer contact each other within the effective encapsulation area and form an overlapping encapsulation. A flattening layer is provided within the bent transition area. The flattening layer terminates at the boundary between the bent transition area and the effective encapsulation area and has a recess on the side of the bent transition area away from the effective encapsulation area. A back plate supports the main body and includes a first edge near the side of the bent portion; A polarizer is located on the side of the main body opposite to the back plate; and A protective adhesive layer covers the bent portion and is connected to the polarizer; Wherein, the distance between the orthographic projection of the overlapping package on the back plate and the orthographic projection of the recess on the back plate is D0, and the distance between the orthographic projection of the polarizer on the back plate and the first edge is D1. .

[0006] In some embodiments, D0 < 0.3 mm and D1 > 0.15 mm.

[0007] In some embodiments, the display module further includes an optical adhesive layer and a cover plate; the optical adhesive layer is located on the side of the polarizer facing away from the main body; the cover plate is located on the side of the optical adhesive layer facing away from the polarizer; the orthographic projection portion of the optical adhesive layer on the back plate is outside the range of the orthographic projection of the polarizer on the back plate.

[0008] In some embodiments, the display module further includes an optical adhesive layer and a cover plate; the optical adhesive layer is located on the side of the polarizer away from the main body; the cover plate is located on the side of the optical adhesive layer away from the polarizer, the cover plate includes a light-emitting portion and a light-blocking portion located on the side of the light-emitting portion; the orthographic projection of the optical adhesive layer on the cover plate overlaps with the light-blocking portion, the distance between the overlapping portions in a first direction is D2, the first direction is perpendicular to the extension direction of the first edge, and D2 > 0.3 mm.

[0009] In some embodiments, D1 > 0.24 mm.

[0010] In some embodiments, the display module further includes an optical adhesive layer and a cover plate; the optical adhesive layer is located on the side of the polarizer away from the main body; the cover plate is located on the side of the optical adhesive layer away from the polarizer; the orthographic projection of the optical adhesive layer on the back plate is within the range of the orthographic projection of the polarizer on the back plate, D1 > 0.24 mm.

[0011] In some embodiments, the display module further includes an optical adhesive layer and a cover plate; the optical adhesive layer is located on the side of the polarizer away from the main body; the cover plate is located on the side of the optical adhesive layer away from the polarizer, the cover plate includes a light-emitting portion and a light-blocking portion located on the side of the light-emitting portion; the orthographic projection of the optical adhesive layer on the cover plate overlaps with the light-blocking portion, the distance between the overlapping portions in a first direction is D2, the first direction is perpendicular to the extension direction of the first edge, 0.3mm≥D2>0.1mm, and D1>0.24mm.

[0012] In some embodiments, 0.18mm ≥ D2 > 0.1mm, and D1 > 0.3mm.

[0013] In some embodiments, 0.3mm ≥ D2 > 0.18mm, and D1 > 0.24mm.

[0014] In some embodiments, D1 ≤ 0.35 mm.

[0015] Some embodiments of this application provide a display device, including the display module described in any of the above embodiments.

[0016] For the display module provided in this application embodiment, the portion of the protective adhesive layer above the backplate can form a buffer strip, and the length of this buffer strip is equal to the distance D1 between the orthographic projection of the polarizer on the backplate and the first edge; that is, the length of the buffer strip is also D1. However, in this application embodiment, since D1... This ensures that the buffer strip always has a relatively large length, regardless of the D0 size range. This allows the buffer strip to effectively absorb the strain energy transmitted from the bending part, thereby preventing the polarizer and the protective adhesive layer from being subjected to large stress and peeling.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] 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.

[0019] Figure 1 These are schematic diagrams of the display module provided in some embodiments of this application; Figure 2 This is a schematic diagram of the structure of a display module provided in other embodiments of this application; Figure 3 This is a schematic diagram showing the relative positional relationship between the display panel and the back panel according to some embodiments of this application; Figure 4 This is a schematic diagram illustrating the appearance of black spots on a display panel in related technologies; Figure 5 This is a schematic diagram of the structure of a display device provided in some embodiments of this application. Detailed Implementation

[0020] 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.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different technical features. The term "multiple" and similar words indicate two or more unless otherwise expressly defined.

[0022] In this application, the descriptions of the various embodiments each have their own emphasis. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. The embodiments, implementation methods, examples, and related technical features of this application can be combined and substituted for each other without conflict.

[0023] This application provides a display module, such as Figure 1 and Figure 2 As shown, the display module 100 includes a display panel 10, a back panel BP, a polarizer POL, and a protective adhesive layer PAL.

[0024] Please continue reading. Figures 1 to 2 The display panel 10 includes a main body 11 and a bent portion 12 located on one side of the main body 11. A backplate BP supports the main body 11, and the backplate BP includes a first edge E1 near the bent portion 12. A polarizer POL is located on the side of the main body 11 opposite to the backplate BP. In this case, the polarizer POL and the backplate BP are located on opposite sides of the main body 11. A protective adhesive layer PAL covers the bent portion 12 and is connected to the polarizer POL. The protective adhesive layer PAL can provide good protection for the bent portion 12 and effectively buffer the stress generated by the bent portion 12 during bending.

[0025] like Figure 3As shown, the main body 11 has a display area, a retaining wall area located outside the display area, an effective encapsulation area located outside the retaining wall area, and a bending transition area located outside the effective encapsulation area. As an example, the display panel 10 also includes a binding portion 13 located on the side of the bending portion 12 away from the main body 11. Furthermore, the display panel 10 also has a bending area and a binding area, with the bending area located between the bending transition area and the binding area. The bending portion 12 is located within the bending area, and the binding portion 13 is located within the binding area. After the bending portion 12 within the bending area is bent, the binding portion 13 is transferred to the back side of the main body 11, thereby effectively reducing the horizontal dimension of the display panel 10 and thus reducing the bezel size of the display module 100. In some examples, the display module 100 may also include a support member SP supporting the binding portion 13, with the support member SP connected to the backplate BP via a buffer member 20.

[0026] The main body 11 includes a light-emitting device layer and an encapsulation layer on the light-emitting device layer. The light-emitting device layer is located within the display area, thereby realizing the display function of the display panel 10. The encapsulation layer is used to encapsulate the light-emitting device in the light-emitting device layer to prevent the light-emitting device from being affected by moisture, thereby ensuring the operational stability of the light-emitting device.

[0027] The encapsulation layer comprises a first inorganic encapsulation layer CVD1, an organic encapsulation layer OEL, and a second inorganic encapsulation layer CVD2, stacked sequentially. The organic encapsulation layer OEL is located inside the barrier region, and the first encapsulation portion M1 of the first inorganic encapsulation layer CVD1 and the second encapsulation portion M2 of the second inorganic encapsulation layer CVD2 contact within the effective encapsulation region to form an overlapping encapsulation component M. A planarization layer PLN is provided within the bending transition region. The planarization layer PLN terminates at the boundary between the bending transition region and the effective encapsulation region, and has a recess K on the side of the bending transition region away from the effective encapsulation region.

[0028] The distance between the orthographic projection of the overlapping package M on the backplane BP and the orthographic projection of the groove K on the backplane BP is D0, and the distance between the orthographic projection of the polarizer POL on the backplane BP and the first edge E1 is D1, and D1 That is, D1 is more than half of D0.

[0029] The inventors discovered that when the distance D0 between the orthographic projection of the overlapping package M on the back plate BP and the orthographic projection of the groove K on the back plate BP is small, the area on the main body 11 of the display panel 10 for arranging the protective adhesive layer PAL is relatively small. This results in the connection position between the protective adhesive layer PAL and the polarizer POL being relatively close to the bending portion 12. The stress generated by the bending portion 12 will act more strongly on the connection position between the polarizer POL and the protective adhesive layer PAL, thereby causing the polarizer POL and the protective adhesive layer PAL to peel off, affecting the performance of the display module 100.

[0030] Furthermore, the portion of the protective adhesive layer PAL located above the backplate BP can form a buffer strip, and the length of this buffer strip is equal to the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1; that is, the length of the buffer strip is also D1. In this embodiment, by setting D1 to more than half of D0, it is ensured that the buffer strip always has a relatively large length, regardless of the size range of D0. This allows the buffer strip to effectively absorb the strain energy transmitted from the bending portion 12, thereby preventing the connection between the polarizer POL and the protective adhesive layer PAL from being subjected to excessive stress and peeling.

[0031] In some embodiments, D0 < 0.3 mm and D1 > 0.15 mm. Since D0 is less than 0.3 mm, this effectively ensures that the display module 100 has a relatively small bezel size, thereby enabling a narrow bezel design. When D0 is less than 0.3 mm, the connection point between the polarizer POL and the protective adhesive layer PAL is close to the bending portion 12, making it easy for the polarizer POL and the protective adhesive layer PAL to peel off. By making D1 greater than 0.15 mm, this ensures that the buffer zone formed by the portion of the protective adhesive layer PAL above the backplate BP can effectively absorb the strain energy transmitted from the bending portion 12, thereby effectively preventing the connection point between the polarizer POL and the protective adhesive layer PAL from experiencing excessive stress and peeling.

[0032] In some embodiments, please continue reading Figure 3 The display panel 10 also has a display transition area located between the display area and the barrier area. No light-emitting devices are disposed in the display transition area, therefore no image is displayed there. An organic encapsulation layer (OEL) portion is located within the display transition area and terminates at the boundary between the display transition area and the barrier area. At least one barrier is provided within the barrier area; for example, a first barrier DAM1 and a second barrier DAM2 may be provided within the barrier area.

[0033] In some examples, the display panel 10 includes a substrate SUB, with a light-emitting device layer located on the substrate SUB. The substrate SUB can drive the light-emitting devices in the light-emitting device layer to emit light, thereby realizing the display function of the display panel 10. The display panel 10 also includes a first metal layer SD1, a passivation layer PV, a first planarization layer PLN1, a second metal layer SD2, a second planarization layer PLN2, a third metal layer SD3, and a third planarization layer PLN3, which are sequentially stacked on the substrate SUB. A first inorganic encapsulation layer CVD1 is disposed on the third planarization layer PLN3. A portion of each of the first barrier wall DAM1 and the second barrier wall DAM2 is located within the third planarization layer PLN3. The first metal layer SD1 extends from the display transition area, sequentially through the barrier wall area, the effective encapsulation area, and into the bending transition area. The planarization layer PLN located in the bending transition area covers a portion of the first metal layer SD1. The planarization layer PLN located in the bending transition area may, for example, include a first planarization portion, a second planarization portion, and a third planarization portion, which are sequentially stacked. The first flattened portion is located within the first flattening layer PLN1, the second flattened portion is located within the second flattening layer PLN2, and the third flattened portion is located within the third flattening layer PLN3.

[0034] As an example, both the first and second flat portions extend from the bending transition area into the binding area, and the third flat portion covers the bending transition area and terminates on the side near the bending area, thereby forming a depression K in the flat layer on the side of the bending transition area near the bending area.

[0035] In some examples, the recess K may extend from the bending transition area into the bonding area. The display panel 10 also includes a pixel definition layer PDL and a support material layer PS located on the pixel definition PDL, a portion of which is located within the bending transition area, the bending area, and the bonding area, thereby filling the recess K.

[0036] The inventors also noted that when the distance D0 between the orthographic projection of the overlapping package M on the backplate BP and the orthographic projection of the groove K on the backplate BP is less than 0.3 mm, the stress generated during bending of the bending portion 12 is easily transmitted to the bending transition area, resulting in peeling between the planarization layer PLN and the metal layer (e.g., the first metal layer SD1), causing encapsulation failure in the effective encapsulation area. Moisture can easily invade the light-emitting device through the channel formed in the peeling occurrence area, thereby causing the display panel to exhibit the following appearance: Figure 4 The black spots shown are a problem. Please refer to 4. The main body of the display panel near the bend is corroded by moisture, causing some light-emitting devices to fail and thus preventing them from emitting light. Figure 4 The area within the Chinese border that should have been displayed was instead black, forming black spots.

[0037] In some embodiments, please continue reading Figure 1 and Figure 2 The display module 100 also includes an optical adhesive layer (OCA) and a cover plate (CG). The optical adhesive layer (OCA) is located on the side of the polarizer (POL) facing away from the main body 11, and the cover plate (CG) is located on the side of the optical adhesive layer (OCA) facing away from the polarizer (POL). The cover plate (CG) includes a light-emitting portion (CG1) and a light-blocking portion (CG2) located on one side of the light-emitting portion (CG1).

[0038] The inventors have found that the factors affecting the failure of the effective encapsulation area usually include the following aspects: (1) the distance between the second edge E2 of the optical adhesive layer OCA near the bending part 12 and the boundary line L between the light-emitting part CG1 and the light-blocking part CG2 (i.e., the distance D2 of the overlapping area in the first direction X as described below); (2) the bending part 12 is a perfect circle or an elliptical bend; (3) the thickness of the protective adhesive layer PAL.

[0039] To address the above influencing factors, the inventors conducted simulations and obtained the level responses of these factors at different levels. The level response refers to the magnitude of the risk of encapsulation failure in the effective encapsulation area at the corresponding level. The simulation results are shown in Table 1.

[0040]

[0041] Table 1 In Table 1, the level response difference is 29.5 when the distance between the second edge E2 and the dividing line L changes from 0.18 mm to 0.42 mm; 3.3 when the bend 12 changes from an elliptical bend to a circular bend; and 2.8 when the thickness of the protective adhesive layer PAL changes from 0.06 mm to 0.07 mm. In other words, compared to whether the bend 12 is circular or elliptical, or compared to the thickness of the protective adhesive layer PAL, the change in the distance D2 between the second edge E2 and the dividing line L has a significantly greater impact on the occurrence of encapsulation failure in the effective encapsulation area.

[0042] In some examples, please refer to [link / reference]. Figure 2 The orthographic projection of the optical adhesive layer OCA onto the cover plate CG overlaps with the light-blocking portion CG2. The distance between the overlapping areas in the first direction X is D2, which is perpendicular to the extension direction of the first edge E1, and D2 > 0.3 mm. Furthermore, the extension direction of the first edge E1 is also perpendicular to the thickness direction of the display module 100 (i.e., the second direction Y in the figure). A dividing line L exists between the light-blocking portion CG2 and the light-emitting portion CG1. The distance D2 between the overlapping areas in the first direction X is the distance between the second edge E2 of the optical adhesive layer OCA near the bending portion 12 and the dividing line L.

[0043] It is worth noting that the light-blocking portion CG2 covers the bending transition area, effective encapsulation area, barrier area, and display transition area of ​​the main body portion 11. In some examples, the cover plate CG may be coated with a light-shielding material (such as black ink) in the area corresponding to the light-blocking portion CG2, thereby forming the light-blocking portion CG2.

[0044] In this example, since the distance D2 of the overlapping area in the first direction X is greater than 0.3 mm, the optical adhesive layer OCA has a relatively long extension in the first direction X, and this part is bonded under the light-blocking portion CG2 of the cover plate CG. This improves the connection stability between the optical adhesive layer OCA and the cover plate CG. Furthermore, because the optical adhesive layer OCA has a relatively long extension in the first direction X, it can effectively absorb the stress generated by the bending of the bending portion 12 during bending, thereby reducing the portion of bending stress transmitted to the bending transition area. This reduces the stress on the planarization layer PLN, and thus effectively reduces the risk of peeling between the planarization layer PLN and the metal layer. This reduces the risk of encapsulation failure in the effective encapsulation area, thereby improving the operational stability of the display module 100.

[0045] In some examples, please refer to [link / reference]. Figure 2 The orthographic projection of the optical adhesive layer OCA onto the backplate BP is outside the range of the orthographic projection of the polarizer POL onto the backplate BP.

[0046] In this configuration, the optical adhesive layer OCA extends beyond the polarizer POL, allowing the portion of OCA extending beyond the polarizer POL to adhere to the light-blocking portion CG2 of the cover plate CG. This improves the connection stability between the optical adhesive layer OCA and the cover plate CG. Furthermore, because the optical adhesive layer OCA extends beyond the polarizer POL, it has a relatively long extension in the first direction X. During the bending process of the bending portion 12, the optical adhesive layer OCA can effectively absorb the stress generated by the bending portion 12, thereby reducing the portion of bending stress transmitted to the bending transition area. This reduces the stress on the planarization layer PLN, effectively reducing the risk of peeling between the planarization layer PLN and the metal layer. This reduces the risk of encapsulation failure in the effective encapsulation area, thereby improving the operational stability of the display module 100.

[0047] In some examples, the portion of the optical adhesive layer OCA that extends beyond the polarizer POL can be connected to the protective adhesive layer PAL. This allows the optical adhesive layer OCA to quickly and effectively absorb the stress generated by the bending of the bending portion 12 during the bending process, thereby effectively reducing the risk of encapsulation failure in the effective encapsulation area.

[0048] The inventors have discovered that factors affecting the failure of the effective packaging area usually include the following: the distance between the polarizer POL and the edge of the backplane BP on the same side (i.e., the distance between the orthographic projection of the polarizer POL on the backplane BP and the first edge E1 is D1).

[0049] To address the influencing factors of packaging failure in the effective packaging area, the inventors also conducted simulations and obtained the level responses of these influencing factors at different levels. The simulation results are shown in Table 2.

[0050]

[0051] Table 2 In Table 2, when the distance between the polarizer POL and the backplate BP on the same side edge (i.e., distance D1) changes from 0.315 mm to 0.24 mm, the level response difference is 24.3; when the bending portion 12 changes from an elliptical bend to a circular bend, the level response difference is 3.3; and when the thickness of the protective adhesive layer PAL changes from 0.06 mm to 0.07 mm, the level response difference is 2.8. In other words, compared to whether the bending portion 12 is circular or elliptical, or compared to the thickness of the protective adhesive layer PAL, the change in the distance between the polarizer POL and the backplate BP on the same side edge has a significantly greater impact on the occurrence of encapsulation failure in the effective encapsulation area.

[0052] In some embodiments of this application, the distance D1 between the orthographic projection of the polarizer POL onto the backplate BP and the first edge E1 is greater than 0.24 mm.

[0053] In this embodiment, by making the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1 greater than 0.24, the supporting surface of the backplate BP for the main body 11 is increased to a certain extent, and the length of the buffer band formed by the protective adhesive layer PAL above the backplate BP is increased. This effectively absorbs the strain energy transmitted from the bending portion 12, thereby reducing the portion of bending stress transmitted to the bending transition area, reducing the stress on the planarization layer PLN, and thus effectively reducing the risk of peeling between the planarization layer PLN and the metal layer. Under these circumstances, the risk of encapsulation failure in the effective encapsulation area is effectively controlled, thereby improving the operational stability of the display module 100.

[0054] In some embodiments, please refer to Figure 1 The orthographic projection of the optical adhesive layer OCA on the back plate BP is within the range of the orthographic projection of the polarizer POL on the back plate BP, and the distance D1 between the orthographic projection of the polarizer POL on the back plate BP and the first edge E1 is greater than 0.24 mm.

[0055] In this case, the optical adhesive layer OCA and the polarizer POL can be flush on the same side, or the optical adhesive layer OCA can be recessed relative to the polarizer POL. As shown in Table 1, when the distance between the second edge E2 and the dividing line L (i.e., the distance D2 of the overlapping area in the first direction X) is small, its level response is relatively high, which can easily lead to encapsulation failure in the effective encapsulation area. In this embodiment, by setting the distance D1 between the orthographic projection of the polarizer POL on the back plate BP and the first edge E1 to 0.24 mm or more, the support surface of the back plate BP for the main body 11 is increased to a certain extent, and the length of the buffer band formed by the protective adhesive layer PAL above the back plate BP is increased, thereby effectively absorbing the strain energy transmitted from the bending portion 12. This reduces the risk of encapsulation failure in the effective encapsulation area and improves the working stability of the display module 100.

[0056] In some embodiments, please continue reading Figure 1 When the cover plate CG includes a light-emitting part CG1 and a light-blocking part CG2, the orthographic projection of the optical adhesive layer OCA on the cover plate CG overlaps with the light-blocking part CG2. The distance between the overlapping parts in the first direction X is D2, where 0.3mm ≥ D2 > 0.1mm and D1 > 0.24mm.

[0057] Since 0.3mm ≥ D2 > 0.1mm, the distance D2 of the overlapping area in the first direction X is small, and its level response is relatively high, which easily leads to encapsulation failure in the effective encapsulation area. In this embodiment, by setting the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1 to 0.24mm or more, the support surface of the backplate BP for the main body 11 is increased to a certain extent, and the length of the buffer band formed by the protective adhesive layer PAL above the backplate BP is increased, thereby effectively absorbing the strain energy transmitted from the bending portion 12. This reduces the risk of encapsulation failure in the effective encapsulation area and improves the working stability of the display module 100.

[0058] In some examples, 0.18mm ≥ D2 > 0.1mm and D1 > 0.3mm.

[0059] For example, the distance D2 of the overlapping area in the first direction X can be 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, or 0.18mm. In this case, the distance D1 between the orthographic projection of the polarizer POL on the back plate BP and the first edge E1 can be 0.32mm, 0.33mm, 0.35mm, 0.36mm, 0.38mm, or 0.4mm, etc. The embodiments of this application do not limit this.

[0060] In this example, when the distance D2 of the overlapping area in the first direction X is within the range of 0.1mm to 0.18mm, the level response is high, which can easily lead to encapsulation failure in the effective encapsulation area. However, by setting the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1 to 0.3mm or more, the support surface of the backplate BP for the main body 11 is increased to a certain extent, and the length of the buffer band formed by the protective adhesive layer PAL above the backplate BP is significantly increased. This effectively absorbs the strain energy transmitted from the bending portion 12, thereby reducing the risk of encapsulation failure in the effective encapsulation area and improving the working stability of the display module 100.

[0061] In some examples, 0.3mm ≥ D2 > 0.18mm and D1 > 0.24mm.

[0062] For example, the distance D2 of the overlapping area in the first direction X can be 0.19mm, 0.2mm, 0.22mm, 0.24mm, 0.25mm, 0.26mm, 0.28mm, 0.29mm, or 0.3mm. In this case, the distance D1 between the orthographic projection of the polarizer POL on the back plate BP and the first edge E1 can be 0.25mm, 0.27mm, 0.29mm, 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, or 0.4mm, etc. The embodiments of this application do not limit this.

[0063] In this example, when the distance D2 of the overlapping area in the first direction X is within the range of 0.18 mm to 0.3 mm, its level response is relatively low, thus the risk of encapsulation failure in the effective encapsulation area is relatively small. By setting the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1 to 0.24 mm or more, the support surface of the backplate BP for the main body 11 is increased, and the length of the buffer band formed by the protective adhesive layer PAL above the backplate BP is increased to a certain extent. This effectively absorbs the strain energy transmitted from the bending portion 12, thereby reducing the risk of encapsulation failure in the effective encapsulation area and improving the working stability of the display module 100.

[0064] In some embodiments, D1 ≤ 0.35 mm.

[0065] In this case, by setting the distance D1 between the orthographic projection of the polarizer POL on the backplate BP and the first edge E1 to within a range of less than 0.35mm, the bezel size of the display module 100 can be effectively reduced, thereby improving the user experience.

[0066] Some embodiments of this application also provide a display device, such as... Figure 5 As shown, the display device 200 includes the display module 100 described in any of the above embodiments.

[0067] Since it includes the display module 100, the display device 200 has the technical effects of the display module 100 described above, which will not be repeated here.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display module, characterized in that, include: A display panel includes a main body and a bent portion located on one side of the main body. The main body has a display area, a barrier area located outside the display area, an effective encapsulation area located outside the barrier area, and a bent transition area located outside the effective encapsulation area. The main body includes a light-emitting device layer and an encapsulation layer located on the light-emitting device layer. The light-emitting device layer is located within the display area. The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially. The organic encapsulation layer is located inside the barrier area. The first encapsulation portion of the first inorganic encapsulation layer and the second encapsulation portion of the second inorganic encapsulation layer contact each other within the effective encapsulation area and form an overlapping encapsulation. A flattening layer is provided within the bent transition area. The flattening layer terminates at the boundary between the bent transition area and the effective encapsulation area and has a recess on the side of the bent transition area away from the effective encapsulation area. A back plate supports the main body and includes a first edge near the side of the bent portion; A polarizer is located on the side of the main body that faces away from the back plate; as well as A protective adhesive layer covers the bent portion and is connected to the polarizer; Wherein, the distance between the orthographic projection of the overlapping package on the back plate and the orthographic projection of the recess on the back plate is D0, and the distance between the orthographic projection of the polarizer on the back plate and the first edge is D1. .

2. The display module according to claim 1, characterized in that, D0 < 0.3 mm and D1 > 0.15 mm.

3. The display module according to claim 2, characterized in that, Also includes: An optical adhesive layer is located on the side of the polarizer opposite to the main body. as well as A cover plate is located on the side of the optical adhesive layer opposite to the polarizer; The portion of the optical adhesive layer projected onto the back plate is outside the range of the polarizer's projection onto the back plate.

4. The display module according to claim 2, characterized in that, Also includes: An optical adhesive layer is located on the side of the polarizer opposite to the main body. as well as A cover plate is located on the side of the optical adhesive layer opposite to the polarizer. The cover plate includes a light-emitting part and a light-blocking part located on one side of the light-emitting part. The optical adhesive layer has an overlapping area with the light-blocking part on the cover plate. The distance between the overlapping areas in a first direction is D2, which is perpendicular to the extension direction of the first edge, and D2 > 0.3 mm.

5. The display module according to claim 3 or 4, characterized in that, D1 > 0.24 mm.

6. The display module according to claim 2, characterized in that, Also includes: An optical adhesive layer is located on the side of the polarizer opposite to the main body. as well as A cover plate is located on the side of the optical adhesive layer opposite to the polarizer; The orthographic projection of the optical adhesive layer on the back plate is within the range of the orthographic projection of the polarizer on the back plate, where D1 > 0.24 mm.

7. The display module according to claim 2, characterized in that, Also includes: An optical adhesive layer is located on the side of the polarizer opposite to the main body. as well as A cover plate is located on the side of the optical adhesive layer opposite to the polarizer. The cover plate includes a light-emitting part and a light-blocking part located on one side of the light-emitting part. The optical adhesive layer has an overlapping area with the light-blocking part on the cover plate. The distance between the overlapping areas in the first direction is D2, which is perpendicular to the extension direction of the first edge. 0.3mm ≥ D2 > 0.1mm, and D1 > 0.24mm.

8. The display module according to claim 7, characterized in that, 0.18mm ≥ D2 > 0.1mm, and D1 > 0.3mm.

9. The display module according to claim 7, characterized in that, 0.3mm ≥ D2 > 0.18mm, and D1 > 0.24mm.

10. The display module according to any one of claims 2-4 or 6-9, characterized in that, D1≤0.35mm.

11. A display device, characterized in that, Includes the display module described in any one of claims 1-10.

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