Display module, preparation method thereof and display device

Abstract

The display module, the preparation method thereof and the display device are provided. The display module comprises a display panel, a support, at least two first adhesive layers and a second adhesive layer. The display panel comprises a first body, a bending part and a second body. The support comprises a first support part and a second support part. The first support part is arranged on the backlight side of the first body, and the second support part is arranged on the side of the second body close to the first body. The first adhesive layer is arranged on the side of the bending part facing the support, and is arranged on both ends of the bending axis of the bending part respectively. At least part of the first adhesive layer is arranged between the first support part and the second support part. The first adhesive layer, the support and the display panel form a filling cavity. The filling cavity comprises a glue filling area and a bubble discharging area. The second adhesive layer is arranged in the filling cavity and is arranged in the glue filling area. The display module realizes the discharge of bubbles and effectively improves the anti-extrusion capacity of the display module.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] In current product structures, bending processes are involved. To improve the structural strength and compression resistance of the bending area, it is usually necessary to fill the bending area with glue. However, in the actual process, a large number of air bubbles exist at the glue filling points, causing severe glue shortage. This results in insufficient compression resistance at the bubble locations, thus causing a decline in product performance. Summary of the Invention

[0004] In view of this, the purpose of this disclosure is to provide a display module and its manufacturing method, as well as a display device, to solve the problem of reduced compressive strength caused by air bubbles in the bending area of ​​the display module.

[0005] For the purposes described above, this disclosure discloses a display module, comprising:

[0006] The display panel includes a first body, a bending portion, and a second body. The first body includes a light-emitting side and a backlight side disposed opposite to the light-emitting side. The second body is located on the backlight side of the first body. The two ends of the bending portion are respectively connected to the first body and the second body, and the bending portion is bent around a bending axis.

[0007] A support member, comprising a first support portion and a second support portion; the first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body close to the first body;

[0008] At least two first adhesive layers are provided, the first adhesive layers are located on the side of the bent portion facing the support member and are respectively located at both ends of the bent portion on the bending axis, and at least a portion of the first adhesive layer is located between the first support member and the second support member. The first adhesive layer, the support member and the display panel enclose a filling cavity, the filling cavity including an adhesive filling area and a bubble removal area.

[0009] The second adhesive layer is disposed within the filling cavity and located in the filling area.

[0010] Furthermore, the material of the first adhesive layer includes a light-cured adhesive;

[0011] Preferably, the material of the first adhesive layer includes at least one of epoxy-based photocurable adhesive and acrylic-based photocurable adhesive;

[0012] Preferably, the viscosity of the first adhesive layer is greater than or equal to 50,000 mPa·s and less than or equal to 150,000 mPa·s;

[0013] Preferably, the thixotropic property of the first adhesive layer is greater than or equal to 3 and less than or equal to 6.

[0014] Furthermore, the material of the second adhesive layer includes thermosetting adhesive;

[0015] Preferably, the material of the second adhesive layer includes at least one of epoxy thermosetting adhesive and acrylic thermosetting adhesive.

[0016] Furthermore, in the direction parallel to the bending axis, the thickness of the first adhesive layer is 200-300 micrometers.

[0017] Furthermore, the filling area occupies 70%-90% of the filling cavity.

[0018] Furthermore, the display module also includes a composite tape, which is attached to the side of the first support portion away from the first body; the first support portion extends toward the bending portion relative to the composite tape; the orthographic projection of the second body onto the first support portion overlaps with the orthographic projection of the composite tape onto the first support portion.

[0019] The display module also includes a shim block, which is located between the first support portion and the composite tape.

[0020] Furthermore, the display module also includes a binding component, which is disposed on the side of the second body away from the first body.

[0021] Based on the same inventive concept, this application also discloses a method for manufacturing a display module, comprising:

[0022] A display panel is provided, the display panel including a first body, a bent portion and a second body, the first body including a light-emitting side and a backlight side disposed opposite to the light-emitting side;

[0023] A support member is formed on one side of the display panel. The support member includes a first support portion and a second support portion. The first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body corresponding to the backlight side of the first body.

[0024] Apply adhesive to both ends of the bend to form a first adhesive layer in a flowing state. The two ends of the first adhesive layer extend from the bend to the side of the first support and the second support away from the display panel.

[0025] The bending portion is bent, and the second body is bent to the backlight side of the first body via the bending portion;

[0026] The first adhesive layer in a flowing state is subjected to a semi-curing treatment to obtain a semi-cured first adhesive layer; the first adhesive layer encloses and forms a filling cavity, the filling cavity including an adhesive filling area and a bubble removal area;

[0027] The adhesive material is filled in the filling area to form a second adhesive layer in a flowing state, and the first adhesive layer in a semi-cured state is subjected to full curing treatment.

[0028] Remove air bubbles from the second adhesive layer;

[0029] The second adhesive layer in its flowing state is cured.

[0030] Further, the step of removing air bubbles from the second adhesive layer includes:

[0031] The second adhesive layer is centrifuged using a centrifuge to move the air bubbles toward the de-bubbling area; preferably, before the step of applying adhesive to both ends of the bent portion, a composite adhesive tape is formed on the side of the first support portion away from the display panel;

[0032] In the step of applying adhesive to both ends of the bend, the first adhesive layer in a flowing state extends to the side of the composite tape facing the bend.

[0033] Based on the same inventive concept, this application also discloses a display device, including the display module as described above, or the display module prepared by the method described above.

[0034] Compared with the prior art, this application has the following technical effects:

[0035] By applying adhesive to both ends of the bent portion of the display panel and allowing it to cure, a sealing layer is formed to prevent the first adhesive layer from overflowing due to centrifugal force during subsequent centrifugation. The sealing layer is divided into an adhesive filling area and a bubble removal area. The second adhesive filling layer only fills the adhesive filling area. During centrifugation, with the bent portion facing outward, bubbles move from the adhesive filling area to the bubble removal area, and the second adhesive layer as a whole moves towards the adhesive filling area. This achieves the separation of bubbles from the second adhesive and the directional discharge of bubbles, improves the uniformity of adhesive filling, and enhances the compressive strength of the display module. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a top view of a display module according to an embodiment of this application before bending;

[0038] Figure 2 This is a top view of the display module after it has been bent in one embodiment of this application;

[0039] Figure 3 for Figure 2 A sectional view along C-C';

[0040] Figure 4 for Figure 2 A sectional view along B-B';

[0041] Figure 5 This application describes a method for preparing a display module according to one embodiment.

[0042] Figure 6 This is a schematic diagram of the structure of the display module before bending in one embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the first adhesive layer structure of the display module before bending in one embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the second adhesive layer structure containing air bubbles in a display module according to one embodiment of this application;

[0045] Figure 9 This is a schematic diagram of the structure of a display device according to an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0047] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] Organic light-emitting diode (OLED) and flat panel display devices based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide application range, becoming the mainstream in display devices. Currently, in the development of narrow bezel technology for screens, a screen bending process is carried out. To improve the structural strength and compression resistance of the bending area, an internal filling process is required, that is, filling the bending area with glue.

[0049] However, the inventors of this application have discovered the following problems in the related technology during long-term practical work:

[0050] In actual manufacturing processes, air bubbles are prone to appear after the bending area is filled with adhesive. Slicing the area where the bubbles are located reveals severe adhesive deficiency. This results in insufficient compression resistance at these bubble locations during subsequent assembly processes, leading to a decrease in product performance.

[0051] Based on the above reasons, this application proposes a display module and its manufacturing method, as well as a display device. The display module includes a display panel, a support member, and at least two first adhesive layers and a second adhesive layer. The display panel includes a first body, a bent portion, and a second body. The first body includes a light-emitting side and a backlight side disposed opposite to the light-emitting side. The second body is located on the backlight side of the first body. The two ends of the bent portion are respectively connected to the first body and the second body, and the bent portion is bent around a bending axis L. The support member includes a first support portion and a second support portion. The first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body close to the first body. The first adhesive layer is located on the side of the bent portion facing the support member and is respectively located at both ends of the bent portion on the bending axis. At least a portion of the first adhesive layer is located between the first support portion and the second support portion. The first adhesive layer, the support member, and the display panel enclose a filling cavity, which includes a filling area and a defoaming area. The second adhesive layer is disposed in the filling cavity and is located in the filling area.

[0052] Through the above design, adhesive is applied and cured at both ends of the bent portion of the display panel to form a sealing layer, preventing the first adhesive layer from overflowing due to centrifugal force during subsequent centrifugation. The sealing layer is divided into a filling area and a degassing area. The second filling layer only fills the filling area. During centrifugation, the bent portion faces outward, and bubbles move from the filling area to the degassing area, while the second adhesive layer as a whole moves towards the filling area. This achieves the separation of bubbles from the second adhesive and the directional discharge of bubbles, improving the uniformity of the filling and enhancing the compressive strength of the display module.

[0053] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Figure 1 This is a top view of a display module according to an embodiment of this application before bending; Figure 2 This is a top view of the display module after it has been bent in one embodiment of this application; Figure 3 for Figure 2 A sectional view along C-C'; Figure 4 for Figure 2 A sectional view along B-B'; Figure 5 This application describes a method for preparing a display module according to one embodiment. Figure 6 This is a schematic diagram of the structure of the display module before bending in one embodiment of this application; Figure 7 This is a schematic diagram of the first adhesive layer structure of the display module before bending in one embodiment of this application; Figure 8 This is a schematic diagram of the second adhesive layer structure containing air bubbles in a display module according to an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a display device according to an embodiment of this application.

[0054] Please refer to Figure 1As shown, the display module 10 includes a display panel 100, a support member 200, at least two first adhesive layers 300 and a second adhesive layer 400.

[0055] In this embodiment, the display panel 100 may be an organic light-emitting diode (OLED) display panel. Optionally, the display panel 100 may be a flexible display panel. The display panel 100 includes a first body 110, a bending portion 120, and a second body 130.

[0056] Among them, such as Figure 2 As shown, the first body 110 corresponds to the display area AA of the display panel 100 and the non-display area NA disposed adjacent to the display area AA. For example, the non-display area NA surrounds the display area AA, so that the display area AA is surrounded by the non-display area NA. The display area AA is the area in the display panel used to perform the display function, and the non-display area NA can be the border area of ​​the display panel 10.

[0057] The second body 130 corresponds to the binding area, which is used to connect with external circuits and transmit the signals input from the external circuits to the data lines, thereby driving the display panel 100 to display the screen.

[0058] The bend 120 has multiple signal lines for transmitting data between the first body 110 and the second body 130.

[0059] In this embodiment, as Figure 3 As shown, the first body 110 includes a light-emitting side 101 and a backlight side 102 disposed opposite to the light-emitting side 101. The second body 130 is located on the backlight side 102 of the first body 110. The two ends of the bent portion 120 are connected to the first body 110 and the second body 130 respectively. The bent portion 120 is bent around the bending axis L, and the bending axis L is parallel to the plane of the first body 110.

[0060] In this embodiment, the display module 10 further includes a support member 200. The support member 200 includes a first support portion 210 and a second support portion 220; the first support portion 210 is disposed on the backlight side 102 of the first body 110, and the second support portion 220 is disposed on the side of the second body 130 close to the first body 110. The support member 200 can provide the necessary rigidity and stability for the display module, protecting the sensitive internal electronic components. The support member 200 can also serve as an insulating layer to prevent electrical short circuits or interference.

[0061] Optionally, the first support portion 210 includes a first end face near the bend portion 120, and the second support portion 220 includes a second end face near the bend portion 120. In this embodiment, the first end face and the second end face are flush, that is, the first end face and the second end face are symmetrically arranged. Optionally, the first end face is flush with the end face of the first body 110 near the bend portion 120, that is, the first body 110, the first end face, and the second end face are located at the boundary between the first body 110 and the bend portion 120.

[0062] Optionally, the materials of the first support portion 210 and the second support portion 220 may include polyethylene terephthalate, etc.

[0063] In this embodiment, as Figure 1 , Figure 3 , Figure 4 As shown, the display module 10 also includes at least two first adhesive layers 300. The first adhesive layers 300 are located on the side of the bent portion 120 facing the support member 200, and are respectively located at both ends of the bent portion 120 at the bending axis L. At least a portion of the first adhesive layers 300 is located between the first support portion 210 and the second support portion 220. The first adhesive layers 300, the support member 200 and the display panel 100 surround and form a filling cavity 500. The filling cavity 500 includes an adhesive filling area 510 and a bubble removal area 520.

[0064] By applying adhesive to both ends of the bent portion of the display panel and curing it, a first adhesive layer 300 with a sealing function is formed to prevent the uncured second adhesive layer from overflowing due to centrifugal force during subsequent centrifugation.

[0065] In this embodiment, as Figure 4 As shown, the display module 10 also includes a second adhesive layer 400. The second adhesive layer 400 is disposed within the filling cavity 500 and located in the filling area 510.

[0066] The first adhesive layer 300 and the second adhesive layer 400 are made of different materials. In this embodiment, the material of the first adhesive layer 300 includes a UV-curable adhesive. Optionally, the material of the first adhesive layer 300 includes at least one of epoxy-based UV-curable adhesive and acrylic-based UV-curable adhesive. The material of the second adhesive layer 400 includes a thermosetting adhesive. Optionally, the material of the second adhesive layer 400 includes at least one of epoxy-based thermosetting adhesive and acrylic-based thermosetting adhesive.

[0067] It should be noted that photocurable adhesives are cured by ultraviolet light, while thermocurable adhesives are cured by heating. Since the first adhesive layer 300 is fully cured before centrifugation, it is used to seal both sides of the display module, preventing the uncured second adhesive layer 400 from overflowing during centrifugation. The second adhesive layer 400 is cured after centrifugation to provide structural support for the bent sections and prevent deformation of the display module. Therefore, using two different curing methods for the two adhesive layers allows for precise curing in the fixed positions. That is, when the first adhesive layer 300 is fully cured by UV triggering, the second adhesive layer 400 is completely unaffected; when the second adhesive layer 400 is cured by heat triggering, the first adhesive layer 300 is also completely unaffected, effectively achieving precise zoned curing.

[0068] In this embodiment, the viscosity of the first adhesive layer 300 is greater than or equal to 50,000 mPa·s and less than or equal to 150,000 mPa·s; the thixotropy of the first adhesive layer 300 is greater than or equal to 3 and less than or equal to 6. This viscosity and thixotropy of the first adhesive layer 300 result in low flowability and high stacking capacity, making it suitable for forming a containment structure at both ends of the bend to restrict internal adhesive flow. After curing, it also prevents the uncured second adhesive layer 400 from overflowing during subsequent centrifugation.

[0069] In this embodiment, the thickness d of the first adhesive layer 300 in the direction parallel to the bending axis L is 200-300 micrometers. For example, the thickness d of the first adhesive layer 300 in the direction parallel to the bending axis L can be 200 micrometers, 220 micrometers, 250 micrometers, 280 micrometers, or 300 micrometers. Within this thickness range, the first adhesive layer 300 can withstand the lateral compressive force of the second adhesive layer 400 during centrifugation and also provide a certain degree of support for the bent portion 120. Specifically, if the thickness of the first adhesive layer 300 is less than 200 micrometers, its strength as a containment structure is insufficient, and it is prone to breakage or deformation under centrifugal force, causing the second adhesive layer 400 to overflow, thus reducing the display module's resistance to compression. If the thickness of the first adhesive layer 300 is greater than 300 micrometers, the amount of the second adhesive layer 400 is less, and the supporting force on the middle of the bent portion 120 is correspondingly reduced, resulting in a decrease in the display module's resistance to compression.

[0070] In this embodiment, the filling area 510 occupies 70%-90% of the filling cavity 500. Alternatively, the degassing area 520 occupies 10%-30% of the filling cavity 500. For example, the filling area 510 can occupy 70%, 75%, 80%, 85%, or 90% of the filling cavity 500. This capacity of the filling area 510 ensures sufficient support for the bent portion while also allowing enough space to expel air bubbles. Specifically, if the filling area 510 occupies less than 70% of the filling cavity 500, the amount of the second adhesive layer 400 is insufficient, resulting in poor support for the bent portion; if the filling area 510 occupies more than 90% of the filling cavity 500, the degassing space is insufficient, and air bubbles cannot move from the filling area 510 to the degassing area 520 during centrifugation.

[0071] In one embodiment, such as Figure 3 As shown, the display module 10 also includes a composite tape 600, which is attached to the side of the first support portion 210 away from the first body 110; the first support portion 210 extends toward the bending portion 120 relative to the composite tape 600; the orthographic projection of the second body 130 on the first support portion 210 overlaps with the orthographic projection of the composite tape 600 on the first support portion 210.

[0072] Optionally, the composite tape 600 may include a mesh adhesive layer, a foam layer, and a metal layer stacked sequentially, or a mesh adhesive layer, a foam layer, a polyimide layer, and a metal layer stacked sequentially. It should be noted that, for foldable display devices, the composite tape 600 can be made of foam or a polyimide layer, and the rigid layer can be made of stainless steel, titanium, or carbon fiber, etc.

[0073] In one embodiment, the display module 10 further includes a shim 700 located between the first support portion 210 and the composite tape 600, used to adjust the bending radius of the bent portion. This effectively reduces stress concentration during bending, lowers the risk of circuit breakage, and improves the reliability and service life of the display module 10. In particular, for flexible display modules, it facilitates the realization of dynamic bending functionality.

[0074] The shim 700 can be made of materials such as silicone, which combine hardness and elasticity. It possesses a certain degree of hardness, providing support for the bending and bonding areas to prevent deformation due to external pressure during display module assembly or use. Simultaneously, its elasticity acts as a buffer, absorbing external impact energy and preventing damage to the bending and bonding areas due to localized stress. When designing the shim, a comprehensive consideration of factors such as the specific structure, dimensions, bending requirements of the display module 10, and the properties of the materials used is necessary to determine its shape, size, hardness, elasticity, and other parameters to better meet the performance requirements of the display module 10.

[0075] Optionally, the material of the shim block 700 includes silicone, polyurethane, polyimide, rubber, etc.

[0076] In one embodiment, the display module 10 further includes a bonding component disposed on the side of the second body 130 away from the first body 110. Optionally, the bonding component includes a chip, a circuit board, etc.

[0077] Based on the same inventive concept, such as Figure 5 As shown, this application also discloses a method for manufacturing a display module, comprising the following steps:

[0078] S1: A display panel is provided, the display panel including a first body, a bent portion and a second body, the first body including a light-emitting side and a backlight side disposed opposite to the light-emitting side. For example... Figure 6 As shown.

[0079] In this embodiment, the display panel 100 may be an organic light-emitting diode (OLED) display panel. Optionally, the display panel 100 may be a flexible display panel.

[0080] The first body 110 corresponds to the display area of ​​the display panel 100 and the non-display area disposed adjacent to the display area. For example, the non-display area surrounds the display area, so that the display area is surrounded by the non-display area. The display area is the area within the display panel used to perform the display function, and the non-display area can be the border area of ​​the display panel 10.

[0081] The second body 130 corresponds to the binding area, which is used to connect with external circuits and transmit the signals input from the external circuits to the data lines, thereby driving the display panel 100 to display the screen.

[0082] The bend 120 has multiple signal lines for transmitting data between the first body 110 and the second body 130.

[0083] S2: A support member is formed on one side of the display panel. The support member includes a first support portion and a second support portion. The first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body corresponding to the backlight side of the first body.

[0084] The support member 200 provides the necessary rigidity and stability for the display module 10, protecting the sensitive internal electronic components. The support member 200 can also act as an insulating layer to prevent electrical short circuits or interference.

[0085] In this embodiment, the support member 200 is attached to one side of the display panel by means of adhesive.

[0086] Optionally, the materials of the first support portion 210 and the second support portion 220 may include polyethylene terephthalate, etc.

[0087] S3: Apply adhesive to both ends of the bend to form a flowing first adhesive layer. The two ends of the first adhesive layer extend from the bend to the side of the first and second supports facing away from the display panel. For example... Figure 7 As shown.

[0088] It should be noted that the viscosity of the first adhesive layer 300 is greater than or equal to 50,000 mPa·s and less than or equal to 150,000 mPa·s; the thixotropy of the first adhesive layer 300 is greater than or equal to 3 and less than or equal to 6. This viscosity and thixotropy of the first adhesive layer 300 result in low flowability and high stacking capacity, making it suitable for forming a containment structure at both ends of a bend to restrict internal adhesive flow. After curing, it also prevents the second adhesive layer 400 from overflowing during subsequent centrifugation.

[0089] S4: The bending part is bent, and the second body is bent to the backlight side of the first body via the bending part.

[0090] like Figure 3 As shown, optionally, the first support portion 210 includes a first end face near the bent portion 120, and the second support portion 220 includes a second end face near the bent portion 120. In this embodiment, the first end face and the second end face are flush, that is, the first end face and the second end face are symmetrically arranged. Optionally, the first end face is flush with the end face of the first body 110 near the bent portion 120, that is, the first body 110, the first end face, and the second end face are located at the boundary between the first body 110 and the bent portion 120.

[0091] S5: The first adhesive layer in the flow state is semi-cured to obtain a first adhesive layer in the semi-cured state; the first adhesive layer encloses and forms a filling cavity, which includes an adhesive filling area and a bubble removal area.

[0092] It should be noted that the curing rate of the semi-curing treatment is 30%-50%, ensuring that the first adhesive layer 300 is initially cured and forming a barrier structure at both ends of the bending part 120 to restrict the flow of adhesive.

[0093] In this embodiment, the material of the first adhesive layer 300 includes a UV-curable adhesive. Optionally, the material of the first adhesive layer 300 includes at least one of epoxy-based UV-curable adhesive and acrylic-based UV-curable adhesive.

[0094] In the direction parallel to the bending axis L, the thickness d of the first adhesive layer 300 is 200-300 micrometers. For example, the thickness d of the first adhesive layer 300 is 200 micrometers, 220 micrometers, 250 micrometers, 280 micrometers, or 300 micrometers. Within this thickness range, the first adhesive layer 300 can withstand the lateral compressive force of the second adhesive layer 400 during centrifugation and also provide a certain degree of support for the bending portion 120. Specifically, if the thickness d of the first adhesive layer 300 is less than 200 micrometers, the strength of the containment structure is insufficient, and it is prone to breakage or deformation under centrifugal force, causing the second adhesive layer 400 to overflow, thus reducing the compressive strength of the display module 10. If the thickness d of the first adhesive layer 300 is greater than 300 micrometers, the amount of the second adhesive layer 400 is less, and the supporting force on the middle of the bending portion 120 is correspondingly reduced, resulting in a decrease in the compressive strength of the display module 10.

[0095] In this embodiment, the filling area 510 occupies 70%-90% of the filling cavity 500. Alternatively, the degassing area 520 occupies 10%-30% of the filling cavity 500. For example, the filling area 510 occupies 70%, 75%, 80%, 85%, or 90% of the filling cavity 500. This volume of filling area 510 ensures sufficient support for the bent portion while also allowing enough space to expel air bubbles. Specifically, if the filling area 510 occupies less than 70% of the filling cavity 500, the amount of the second adhesive layer 400 is insufficient, resulting in poor support for the bent portion; if the filling area 510 occupies more than 90% of the filling cavity 500, the degassing space is insufficient, and air bubbles cannot move from the filling area 510 to the degassing area 520 during centrifugation.

[0096] S6: Fill the filling area with adhesive material to form a flowing second adhesive layer, and perform full curing treatment on the semi-cured first adhesive layer.

[0097] like Figure 8 As shown, air bubbles exist in the second adhesive layer 400 at this point, and there is a severe lack of adhesive at the locations of the air bubbles. This results in insufficient resistance to compression at the locations of the air bubbles during subsequent assembly processes, thus causing a decline in product performance.

[0098] In this embodiment, the material of the second adhesive layer 400 includes thermosetting adhesive. Optionally, the material of the second adhesive layer 400 includes at least one of epoxy thermosetting adhesive and acrylic thermosetting adhesive.

[0099] After full curing, the first adhesive layer 300 forms a seal at both ends of the display module to prevent the second adhesive layer 150 from overflowing due to centrifugal force during subsequent centrifugation.

[0100] It should be noted that the first adhesive layer 300 and the second adhesive layer 400 are made of different materials. In this embodiment, the first adhesive layer 300 is made of UV-cured adhesive, while the second adhesive layer 400 is made of thermosetting adhesive. UV-cured adhesive is cured by ultraviolet light irradiation, while thermosetting adhesive is cured by heating. Since the first adhesive layer 300 is fully cured before centrifugation, it is used to seal both sides of the display module to prevent the second adhesive layer 400 from overflowing during centrifugation. The second adhesive layer 400 is cured after centrifugation, which provides structural support for the bent parts and prevents the display module from deforming. Therefore, using two different curing methods for the two adhesive layers allows for precise curing of the fixed positions. That is, when the first adhesive layer 300 is fully cured by UV triggering, the second adhesive layer 400 is completely unaffected, and when the second adhesive layer 400 is cured by heat triggering, the first adhesive layer 300 is also completely unaffected, effectively achieving precise zonal curing.

[0101] S7: Remove air bubbles from the second adhesive layer.

[0102] It should be noted that centrifuging the second adhesive layer 400 with a centrifuge causes the air bubbles to move towards the degassing zone 520. Specifically, with the bend 120 of the display module 10 facing outwards, the display module is centrifuged. Under the action of centrifugal force, the second adhesive layer 400 moves outwards as a whole, that is, from a position away from the bend 120 to a position closer to the bend 120. As a result, the air bubbles, due to the compression effect of the second adhesive layer 400, move towards the degassing zone 520. Once the air bubbles disappear in the degassing zone 520, the air bubbles are successfully degassed.

[0103] Optionally, such as Figure 3 As shown, before the step of applying adhesive at both ends of the bent portion 120, a composite adhesive tape 600 is formed on the side of the first support portion 210 away from the display panel 100. In the step of applying adhesive at both ends of the bent portion 120, the first adhesive layer 300 in a flowing state extends to the side of the composite adhesive tape 600 facing the bent portion 120.

[0104] Specifically, the composite tape 600 is attached to the side of the first support portion 210 away from the first body 110; the first support portion 210 extends toward the bending portion 120 relative to the composite tape 600; the orthographic projection of the second body 130 on the first support portion 210 overlaps with the orthographic projection of the composite tape 600 on the first support portion 210.

[0105] Optionally, the composite tape 600 may include a mesh adhesive layer, a foam layer, and a metal layer stacked sequentially, or a mesh adhesive layer, a foam layer, a polyimide layer, and a metal layer stacked sequentially. It should be noted that, for foldable display devices, the composite tape 600 can be made of foam or a polyimide layer, and the rigid layer can be made of stainless steel, titanium, or carbon fiber, etc.

[0106] Optionally, the display module also includes a shim block 700. During the dispensing step at both ends of the bend 120, the first adhesive layer 300 in a flowing state extends to the side of the shim block 700 facing the bend.

[0107] Specifically, the shim 700 is located between the first support 210 and the composite tape 600, and is used to adjust the bending radius of the bent part. This effectively reduces stress concentration during the bending process, lowers the risk of circuit breakage, and improves the reliability and service life of the display module. In particular, for flexible display modules, it is beneficial to realize dynamic bending function.

[0108] The shim 700 can be made of materials such as silicone, which combine hardness and elasticity. It possesses a certain degree of hardness, providing support for the bending and bonding areas to prevent deformation caused by external pressure during display module assembly or use. Simultaneously, its elasticity acts as a buffer, absorbing external impact energy and preventing damage to the bending and bonding areas due to localized stress. When designing the shim 700, a comprehensive consideration of factors such as the specific structure, dimensions, bending requirements of the display module, and the properties of the materials used is necessary to determine its shape, size, hardness, elasticity, and other parameters to better meet the performance requirements of the display module.

[0109] Optionally, the material of the shim block 700 includes silicone, polyurethane, polyimide, rubber, etc.

[0110] In this embodiment, the first adhesive layer 300 extends to the side of the composite tape 600 and / or the shim block 700 facing the bend, further expanding the sealing position of the first adhesive layer 300 and preventing the second adhesive layer 400 from overflowing during centrifugation.

[0111] S8: Curing the second adhesive layer in its fluid state.

[0112] After the air bubbles are expelled and cured, the second adhesive layer 400 provides support for the bent portion 120 of the display module, improving the display module's resistance to compression and enhancing its performance.

[0113] Based on the same inventive concept, this application discloses a display device including the display module 10 as described above.

[0114] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 9 As shown, the display device is a product with image display capabilities. For example, the display device can be used to display static images, such as pictures or photographs. The display device can also be used to display dynamic images, such as videos.

[0115] Display devices can be laptops, mobile phones, handheld or portable computers, cameras, camcorders, in-vehicle smart central control screens, calculators, smartwatches, GPS navigators, electronic photographs, electronic billboards or signs, projectors, etc.

[0116] The display device includes the display module provided in any of the above embodiments. The display panel included in the display module may be an organic light-emitting diode display panel or a quantum dot electroluminescent display panel.

[0117] In addition, the display device can also perform functions such as taking photos, recording videos, fingerprint recognition, and facial recognition. Accordingly, the display device also includes at least one functional module for implementing the above functions, such as an under-display camera or an under-display fingerprint recognition sensor.

[0118] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0119] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A display module, characterized in that, include: The display panel includes a first body, a bending portion, and a second body. The first body includes a light-emitting side and a backlight side disposed opposite to the light-emitting side. The second body is located on the backlight side of the first body. The two ends of the bending portion are respectively connected to the first body and the second body, and the bending portion is bent around a bending axis. A support member, comprising a first support portion and a second support portion; the first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body close to the first body; At least two first adhesive layers are provided, the first adhesive layers are located on the side of the bent portion facing the support member and are respectively located at both ends of the bent portion on the bending axis, and at least a portion of the first adhesive layer is located between the first support member and the second support member. The first adhesive layer, the support member and the display panel enclose a filling cavity, the filling cavity including an adhesive filling area and a bubble removal area. The second adhesive layer is disposed within the filling cavity and located in the filling area.

2. The display module according to claim 1, characterized in that, The material of the first adhesive layer includes a light-cured adhesive; Preferably, the material of the first adhesive layer includes at least one of epoxy-based photocurable adhesive and acrylic-based photocurable adhesive; Preferably, the viscosity of the first adhesive layer is greater than or equal to 50,000 mPa·s and less than or equal to 150,000 mPa·s; Preferably, the thixotropic property of the first adhesive layer is greater than or equal to 3 and less than or equal to 6.

3. The display module according to claim 1, characterized in that, The material of the second adhesive layer includes thermosetting adhesive; Preferably, the material of the second adhesive layer includes at least one of epoxy thermosetting adhesive and acrylic thermosetting adhesive.

4. The display module according to claim 1, characterized in that, In the direction parallel to the bending axis, the thickness of the first adhesive layer is 200-300 micrometers.

5. The display module according to claim 1, characterized in that, The filling area occupies 70%-90% of the filling cavity.

6. The display module according to claim 1, characterized in that, The display module further includes a composite tape, which is attached to the side of the first support portion away from the first body; the first support portion extends toward the bending portion relative to the composite tape; the orthographic projection of the second body onto the first support portion overlaps with the orthographic projection of the composite tape onto the first support portion. The display module also includes a shim block, which is located between the first support portion and the composite tape.

7. The display module according to claim 1, characterized in that, The display module also includes a binding component, which is disposed on the side of the second body away from the first body.

8. A method for manufacturing a display module, characterized in that, include: A display panel is provided, the display panel including a first body, a bent portion and a second body, the first body including a light-emitting side and a backlight side disposed opposite to the light-emitting side; A support member is formed on one side of the display panel. The support member includes a first support portion and a second support portion. The first support portion is disposed on the backlight side of the first body, and the second support portion is disposed on the side of the second body corresponding to the backlight side of the first body. Apply adhesive to both ends of the bend to form a first adhesive layer in a flowing state. The two ends of the first adhesive layer extend from the bend to the side of the first support and the second support away from the display panel. The bending portion is bent, and the second body is bent to the backlight side of the first body via the bending portion; The first adhesive layer in a flowing state is subjected to a semi-curing treatment to obtain a semi-cured first adhesive layer; the first adhesive layer encloses and forms a filling cavity, the filling cavity including a filling area and a defoaming area; The adhesive material is filled in the filling area to form a second adhesive layer in a flowing state, and the first adhesive layer in a semi-cured state is subjected to full curing treatment. Remove air bubbles from the second adhesive layer; The second adhesive layer in its flowing state is cured.

9. The method for preparing a display module according to claim 8, characterized in that, The step of removing air bubbles from the second adhesive layer includes: The second adhesive layer is centrifuged using a centrifuge to move the air bubbles toward the de-bubbling area; preferably, before the step of applying adhesive to both ends of the bent portion, a composite adhesive tape is formed on the side of the first support portion away from the display panel; In the step of applying adhesive to both ends of the bend, the first adhesive layer in a flowing state extends to the side of the composite tape facing the bend.

10. A display device, characterized in that, The display module includes any one of the display modules as described in any one of claims 1-7, or the display module prepared by the method described in any one of claims 8-9.

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