Display module, preparation method thereof and display device

Abstract

The embodiment of the invention provides a display module, a preparation method thereof and a display device, relates to the technical field of display, and aims to reduce a frame of the display device. The display module comprises a display panel, bending glue and blocking glue. The display panel comprises a main body part, a bending part and a binding part, and the bending part is located between the main body part and the binding part; the bending part can be bent towards the back side of the main body part along a bending shaft extending in the first direction, so that the binding part is bent to the back side of the main body part. The bending part comprises a first transition area, a second transition area and a bending area located between the first transition area and the second transition area, and the first transition area is adjacent to the main body part. The blocking glue comprises first blocking glue, and the first blocking glue is located between the bending glue and the display area. And in the second direction, the length of the first blocking glue is less than or equal to 240 microns. The second direction is perpendicular to the first direction and is parallel to the main body part. The display module is used for the display device.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module, a preparation method thereof, and a display device. Background Art

[0002] With the rapid development of display technology, display technologies such as Liquid Crystal Display (LCD), Organic Light Emitting Display (OLED), Quantum Dot Light Emitting Display (QLED), and Mini / Micro Light Emitting Display (MLED) have become widely integrated into people's daily lives. For example, smartphones, wearable watches, televisions, laptops, and car displays have gradually become pervasive in people's lives. Currently, how to reduce the bezel of display devices and increase the screen-to-body ratio of display devices has always been the focus of display technology research and development. Summary of the Invention

[0003] The present disclosure provides a display module, a manufacturing method thereof, and a display device, so as to reduce the frame of the display device and increase the screen-to-body ratio of the display device.

[0004] In one aspect, a display module is provided. The display module includes a display panel, a bending adhesive, and a barrier adhesive. The display panel has a display side and a back side arranged opposite to each other. The display panel includes a main body, a bending portion, and a binding portion connected in sequence, wherein the bending portion is located between the main body and the binding portion; the main body has a display area; the bending portion can be bent toward the back side of the main body along a bending axis extending in a first direction, so that the binding portion is bent to the back side of the main body. The bending portion includes a first transition zone, a second transition zone, and a bending zone located between the first transition zone and the second transition zone, wherein the first transition zone is adjacent to the main body.

[0005] The bending adhesive is disposed on the display side of the display panel and covers the bending area. The blocking adhesive is disposed on the display side of the display panel and is connected to the bending adhesive. The blocking adhesive includes a first blocking adhesive, which is located between the bending adhesive and the display area. Furthermore, along a second direction, the length of the first blocking adhesive is less than or equal to 240 μm. The second direction is perpendicular to the first direction and parallel to the main body.

[0006] Compared with the related art, the display module provided by the embodiment of the present disclosure has a reduced distance between the top and bottom ends of the first barrier adhesive on the side away from the bending adhesive, so that the total length of the first barrier adhesive and the bending adhesive in the second direction can be reduced by at least 230μm. In this way, the length of the frame of the display device corresponding to the bound circuit board in the second direction can be reduced by at least 230μm, thereby achieving the purpose of reducing the frame of the display device and increasing the screen-to-body ratio of the display device.

[0007] In some embodiments, the barrier adhesive further includes a second barrier adhesive, and the bending adhesive is located between the first barrier adhesive and the second barrier adhesive; and along the second direction, a length of the second barrier adhesive is less than or equal to 240 μm.

[0008] In some embodiments, along a third direction, the thickness of the blocking adhesive is greater than or equal to the thickness of the bending adhesive; and the third direction is perpendicular to the main body.

[0009] In some embodiments, along the third direction, the thickness of the barrier adhesive is 0 μm to 40 μm greater than the thickness of the bending adhesive.

[0010] In some embodiments, along a third direction, a ratio of a thickness of the bending adhesive to a thickness of the blocking adhesive is 1 to 1.02; and the third direction is perpendicular to the main body.

[0011] In some embodiments, the thickness of the barrier adhesive is 30 μm to 70 μm; and / or the thickness of the bending adhesive is 30 μm to 70 μm.

[0012] In some embodiments, along the second direction, a distance between a top end and a bottom end of a side of the blocking adhesive away from the bending adhesive is less than or equal to 120 μm.

[0013] In some embodiments, the surface energy of the barrier adhesive is greater than the surface energy of the bending adhesive.

[0014] In some embodiments, the surface energy of the barrier adhesive is greater than the surface energy of the film layer in contact with the barrier adhesive in the display panel; and / or the surface energy of the bending adhesive is less than the surface energy of the film layer in contact with the bending adhesive in the display panel.

[0015] In some embodiments, the material of the barrier adhesive includes a main material and a doping material, the main material is the same as the material of the bending adhesive; and the specific surface area of ​​the doping material is greater than the specific surface area of ​​the main material.

[0016] In some embodiments, the specific surface area of ​​the doping material is greater than or equal to 200.

[0017] In some embodiments, the display module further comprises a cover plate and an anti-reflection layer. The cover plate is disposed on the display side of the display panel and covers the main body. The anti-reflection layer is disposed between the main body of the display panel and the cover plate. The first barrier adhesive is disposed between the anti-reflection layer and the bending adhesive.

[0018] In another aspect, a display device is provided. The display device comprises the display module as described in any of the above embodiments and a housing. The display module is disposed in the housing.

[0019] On the other hand, a method for preparing a display module is provided. The method for preparing a display module includes: providing a display panel. The display panel has a display side and a back side arranged opposite to each other. The display panel includes a main body, a bending portion, and a binding portion connected in sequence, wherein the bending portion is located between the main body and the binding portion; the main body has a display area; the bending portion can be bent toward the back side of the main body along a bending axis extending in a first direction, so that the binding portion is bent to the back side of the main body. The bending portion includes a first transition zone, a second transition zone, and a bending zone located between the first transition zone and the second transition zone, wherein the first transition zone is adjacent to the main body.

[0020] A bending adhesive and a barrier adhesive are formed on the display side of the display panel. The bending adhesive covers the bending area. The barrier adhesive is connected to the bending adhesive. The barrier adhesive includes a first barrier adhesive positioned between the bending adhesive and the display area. Furthermore, the length of the first barrier adhesive along a second direction is less than or equal to 240 μm; the second direction is perpendicular to the first direction and parallel to the main body.

[0021] In some embodiments, forming the bending glue and the blocking glue on the display side of the display panel includes: forming a first glue material on the display side of the display panel. The first glue material is located between the display area and the bending area. Curing the first glue material to form the first blocking glue. Forming a second glue material on the display side of the display panel. The second glue material is located on a side of the first blocking glue away from the display area and covers the bending area; the viscosity of the second glue material is less than that of the first glue material. Curing the second glue material to form the bending glue.

[0022] In some embodiments, between forming the first adhesive material on the display side of the display panel and curing the first adhesive material, forming the bending adhesive and the barrier adhesive on the display panel further includes: forming a third adhesive material on the display side of the display panel. The third adhesive material is located on a side of the bending region away from the first transition region. During the curing of the first adhesive material, the third adhesive material is also cured to form a second barrier adhesive. The bending adhesive is located between the first barrier adhesive and the second barrier adhesive. Furthermore, along the second direction, the length of the second barrier adhesive is less than or equal to 240 μm.

[0023] The beneficial effects of the display device and the method for manufacturing the display module provided by the embodiments of the present disclosure are the same as the beneficial effects of the display module provided by the above technical solution, and are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0025] Figure 1 is a structural diagram of a display device according to some embodiments;

[0026] Figure 2 is a structural diagram of another display device according to some embodiments;

[0027] Figure 3 for Figure 1 Sectional view along section line CC';

[0028] Figure 4 is a top view of a display panel of a display module in an unfolded state according to some embodiments;

[0029] Figure 5 for Figure 4 A sectional view along section line DD';

[0030] Figure 6 for Figure 5 The structure diagram of the display panel in the display module after being bent;

[0031] Figure 7 for Figure 4 Another sectional view along section line DD';

[0032] Figure 8 for Figure 7 The structure diagram of the display panel in the display module after being bent;

[0033] Figure 9 is a structural diagram of a support assembly of a display module according to some embodiments;

[0034] Figure 10 is a cross-sectional view of a display panel according to some embodiments;

[0035] Figures 11 to 13 is a flow chart of a method for preparing a display module according to some embodiments;

[0036] Figures 14 to 16 1 is a diagram illustrating the steps of a method for preparing a display module according to some embodiments. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0038] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0039] Terms such as "first" and "second" are used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one component from other components. For example, an element referred to as a first element in one embodiment can be referred to as a second element in another embodiment without departing from the scope of the appended claims. Unless otherwise mentioned, terms in the singular may include plural forms.

[0040] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connected" can mean fixed connection, detachable connection, or integration; it can be directly connected or indirectly connected through an intermediate medium.

[0041] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0042] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0043] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0044] As used herein, "about" or "approximately" is inclusive of the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0045] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0046] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0047] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0048] In this specification, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. It will be further understood that, unless expressly defined herein, terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted as an ideal or overly formal meaning.

[0049] In the present specification, when an element (or region, layer, part) is referred to as “coating” another element, it can directly coat the other element or an intervening third element may also be present.

[0050] In the present disclosure, terms such as "lower", "below", "above" and similar words are used to explain the relationship between components shown in the drawings. Terms may be relative concepts and described based on the directions shown in the drawings, but are not limited thereto.

[0051] The term "overlap" or "overlapping" means that a first object may be above or below or to the side of a second object, and vice versa. Additionally, the term "overlap" may include stacking, stacking, facing, facing, extending over, covering, or partially covering, or any other suitable term that would be appreciated and understood by one of ordinary skill in the art.

[0052] When an element is described as “not overlapping” or “will not overlap” another element, this may include the elements being spaced apart, offset, or separated from each other, or any other suitable terminology as would be appreciated and understood by one of ordinary skill in the art.

[0053] The term "opposite" means that the first element may be directly or indirectly opposite to the second element. In the case where a third element is interposed between the first and second elements, the first and second elements may be understood to be indirectly opposite to each other although they are still opposite to each other.

[0054] like Figure 1 As shown, some embodiments of the present disclosure provide a display device 1000 , which may be any device that displays anything, whether in motion (eg, video) or stationary (eg, still image), and whether text or image.

[0055] For example, see Figure 1 The display device 1000 can be any product or component with a display function, such as a television, a laptop computer, a tablet computer, a mobile phone, a personal digital assistant (PDA), a navigator, a car display, an aircraft display, a wearable device, a virtual reality (VR) device, etc.

[0056] For example, Figure 1 As shown, the display device 1000 may be a portable display product; for example, the display device 1000 may be Figure 1 For example, see Figure 2 , the display device 1000 may be a wearable device; for example, the display device 1000 may be Figure 2 The watch shown in.

[0057] Depending on different application scenarios, the display device 1000 can be any of a flat display device, a curved display device, a foldable display device, or a rollable display device. Furthermore, the display surface of the display device 1000 can be substantially circular, elliptical, polygonal, or irregular in shape, which is not specifically limited in the present disclosure.

[0058] In this document, "substantially circular or elliptical" means that the shape is generally circular or elliptical, but is not limited to a perfect circle or ellipse. Specifically, "circular or elliptical" includes not only substantially circular or elliptical shapes, but also shapes similar to circles or ellipses. For example, "circular or elliptical" includes not only curves with uniform curvature throughout, but also smooth curves. In other words, a circle or ellipse may include multiple end-to-end broken line segments that approximate an arc shape.

[0059] In this document, "substantially polygonal" means that the shape is generally polygonal, but is not limited to a standard polygon. That is, "polygonal" here includes not only basic polygonal shapes but also shapes similar to polygons. For example, if two adjacent sides of a polygon are curved at each intersection (i.e., at a corner), the corners are smooth, and the shape is a rounded polygon.

[0060] Below, some embodiments of the present disclosure are schematically described by taking the above-mentioned display device 1000 as a flat display device and the shape of the display surface of the display device 1000 being approximately rectangular as an example. However, the implementation of the present disclosure is not limited to this, and any other display device 1000 can also be considered as long as the same technical concept is applied.

[0061] In some embodiments, see Figure 3 The display device 1000 includes a display module 100 and a housing 200. The display module 100 can be disposed in the housing 200. For example, Figure 3 As shown, the housing 200 may be a box-shaped structure with an opening, and the display module 100 may be disposed in the housing 200 .

[0062] In some embodiments, as Figure 3 As shown, the display module 100 includes a display panel 10. The display panel 10 may have a display side 10A and a back side 10B that are opposite to each other. The display side 10A refers to a side of the display panel 10 that displays an image ( Figure 3 The back side 10B refers to the other side opposite to the display side 10A ( Figure 3 the lower side of the display panel 10).

[0063] It should be noted that the display side 10A only refers to the side of the display panel 10 that displays the image, and does not mean that the entire surface of the display side 10A of the display panel 10 can display. It may be that part of the surface of the display side 10A of the display panel 10 (for example, the surface of the display area A) can display, and the remaining part cannot display.

[0064] Among them, such as Figure 4 As shown, the display panel 10 includes a display area A and a peripheral area B disposed on at least one side of the display area A. The display area A is an area for displaying images and is configured to be provided with a plurality of sub-pixels P. The peripheral area B is an area for not displaying images and is configured to be provided with a display driving circuit, such as a gate driving circuit and a source driving circuit. Figure 4 In the example, the peripheral area B is arranged around the display area A.

[0065] In addition, the above-mentioned display panel 10 can be: an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, a light emitting diode display panel, a liquid crystal display panel, a plasma display panel, a field emission display panel, an electrowetting display panel or an electrophoretic display panel, etc., and the embodiments of the present disclosure do not specifically limit this.

[0066] The following takes the display panel 10 as an OLED display panel as an example to schematically illustrate some embodiments of the present disclosure, but the implementation of the present disclosure is not limited to this, and any other display panel 10 can also be considered as long as the same technical concept is applied.

[0067] In some embodiments, see Figure 5 The display module 100 may further include an anti-reflection layer 310, which is disposed on the display side 10A of the display panel 10. The anti-reflection layer 310 is used to reduce the reflection intensity of external ambient light on the display panel 10, thereby improving the display effect.

[0068] For some examples, see Figure 5 The anti-reflection layer 310 is a polarizer, which is arranged on the display side 10A of the display panel 10. The polarizer selects light of a certain polarization direction to pass through, thereby reducing the reflection intensity of the external ambient light on the display panel 10 and improving the display effect.

[0069] Among them, such as Figure 5 As shown, the polarizer can be directly formed on the display side 10A of the display panel 10 by a semiconductor process. In other examples, such as Figure 7 As shown, the display module 100 further includes a first adhesive layer 320 , and the polarizer is bonded to the display panel 10 via the first adhesive layer 320 .

[0070] It should be noted that the material of the first adhesive layer 320 includes a transparent adhesive layer. Here, a transparent adhesive layer refers to an adhesive layer with a transmittance greater than or equal to 90%. For example, the material of the first adhesive layer 320 may include optical adhesive, which is not specifically limited in the present embodiment.

[0071] For other examples, see Figure 5 The anti-reflection layer 310 includes a black matrix and a color filter. The black matrix is ​​used to separate the light emitted from different sub-pixels and reduce the amount of reflected light generated by ambient light entering the display panel 10. The color filter can filter out most of the wavelengths of ambient light, thereby reducing the intensity of ambient light reflected from the display panel 10.

[0072] In some embodiments, as Figure 3 and Figure 5 As shown, the display module 100 may further include a circuit board 400 , which is connected to the display panel 10 to provide the display panel 10 with required display signals.

[0073] Among them, combined Figure 5 and Figure 6 The circuit board 400 can be connected to the end of the display panel 10 at the display side 10A of the display panel 10, and the circuit board 400 can be bent to the back side of the display panel 10 along with the display panel 10 to reduce the frame of the display device 1000.

[0074] It should be noted that the circuit board 400 may include a timing controller (TCON for short), a power management chip, and an adjustable resistor voltage divider circuit (generating Vcom), etc.

[0075] For example, see Figure 4 and Figure 5 The display panel 10 includes a main body 101, a bent portion 102, and a binding portion 103 connected in sequence, and the bent portion 102 is located between the main body 101 and the binding portion 103. That is, the main body 101, the bent portion 102, and the binding portion 103 are arranged in sequence in the second direction Y.

[0076] Among them, combined Figure 4 、 Figure 5 and Figure 6 The main body 101 is configured to display an image. For example, the main body 101 may include a display area A and a portion of the peripheral area B. The binding portion 103 is configured to connect to the circuit board 400, and through a bending process, the bending portion 102 can be bent along a bending axis extending in the first direction X toward the back side 10B of the main body 101 of the display panel 10, so that the circuit board 400 and the binding portion 103 are bent along the bending portion 102 to the back side 10B of the main body 101 of the display panel 10, thereby reducing the size of the display device 1000 (see Figure 1 ), where the first direction X is perpendicular to the second direction Y and is parallel to the main body 101.

[0077] The bending radius of the bending portion 102 may be 0.1 mm to 0.5 mm; for example, the bending radius of the bending portion 102 may be any one of 0.1 mm, 0.2 mm, 0.3 mm, 0.35 mm, 0.4 mm and 0.5 mm.

[0078] It should be noted that a driver chip 500 may also be provided on the binding portion 103 to reduce the width of the peripheral area B included in the main body 101, thereby reducing the width of the entire peripheral area B and increasing the screen-to-body ratio.

[0079] It should be understood that the bent portion 102 of the display panel 10 may omit some film layers compared to the main portion 101. For example, the bent portion 102 may retain only one or two metal layers for arranging connecting wires, thereby reducing the bending resistance of the bent portion 102 and lowering the risk of cracks or breakage in the bent portion 102. In other words, the main portion 101 and the bent portion 102 may be divided by the transition position of the wires, which is not specifically limited in the present embodiment.

[0080] Based on the above, the display panel 10 has two states: an unfolded state and a bent state. Figure 5 As shown, the bending state is Figure 6 As shown, the positional relationship of various parts of the display panel 10 is described below by taking the unfolded state as an example, but the embodiments of the present disclosure are not limited thereto.

[0081] In this case, the anti-reflection layer 310 can be located in the main body 101 and cover the display area A to improve the ability of the entire display area A to resist interference from external ambient light. For example, the boundary of the orthographic projection of the anti-reflection layer 310 on the display panel 10 is located between the boundary of the display area A and the boundary of the main body 101.

[0082] It should be understood that see Figure 5 The bending portion 102 includes a first transition region M1, a second transition region M2, and a bending region M3 located between the first transition region M1 and the second transition region M2. The first transition region M1 is adjacent to the main body 101.

[0083] like Figure 5 and Figure 6 As shown, the first transition zone M1 and the second transition zone M2 are the areas where the unbent extension sections in the bending portion 102 are located, the bending zone M3 is the area where the bending section in the bending portion 102 is located, and the part of the bending portion 102 located in the first transition zone M1 is connected to the main body 101, and the part of the bending portion 102 located in the second transition zone M2 is connected to the binding portion 103.

[0084] In the related art, the display module also includes a protective adhesive that covers the bent portion and is connected to the polarizer. However, the length of the protective adhesive between the bent portion and the polarizer is too long. The distance between the top and bottom ends of the protective adhesive on the side close to the polarizer is at least 350μm, that is, the length of this portion is greater than or equal to 700μm. This results in the display device corresponding to the frame of the bound circuit board ( Figure 1 The width of the lower border in the display is relatively large, which is not conducive to the narrow border design of the display device.

[0085] Based on this, see Figure 5 The display module 100 provided in some embodiments of the present disclosure further includes a bending adhesive 110 and a blocking adhesive 120 .

[0086] like Figure 5 As shown, the bending adhesive 110 is disposed on the display side 10A of the display panel 10 and covers the bending region M3. The barrier adhesive 120 is disposed on the display side 10A of the display panel 10 and is connected to the bending adhesive 110. The barrier adhesive 120 includes a first barrier adhesive 121, which is located between the bending adhesive 110 and the display region A. For example, the first barrier adhesive 121 is located between the bending adhesive 110 and the anti-reflection layer 310.

[0087] The surface energy of the first barrier adhesive 121 is greater than the surface energy of the bending adhesive 110. It should be understood that the greater the surface energy of the adhesive, the smaller the area of ​​the adhesive of the same mass spread on the display panel 10 before curing. In other words, the smaller the area of ​​the first barrier adhesive 121 spread on the display panel 10, the shorter the length of the first barrier adhesive 121 in the second direction Y, thereby reducing the frame of the display device 1000 corresponding to the bound circuit board 400 ( Figure 1 The length of the lower border in the second direction Y.

[0088] For example, see Figure 5 The surface energy of the first barrier glue 121 is greater than the surface energy of the film layer in the display panel 10 that contacts the first barrier glue 121, so as to reduce the spreading area of ​​the first barrier glue 121 formed on the display panel 10 by the inkjet printing process, thereby shortening the length of the first barrier glue 121 in the second direction Y.

[0089] For example, Figure 10 As shown, the display panel 10 includes a display substrate 11 and an encapsulation layer 12 for encapsulating the display substrate 11. The encapsulation layer 12 is disposed on the display substrate 11 to prevent moisture and oxygen from the external environment from entering the display panel 10, thereby shortening the service life of the display panel 10. Here, the film layer in the display panel 10 that contacts the first barrier adhesive 121 is the encapsulation layer 12, that is, the surface energy of the first barrier adhesive 121 is greater than the surface energy of the encapsulation layer 12.

[0090] It should be understood that the film layer stacking structure included in the display substrate 11 is not unique. Figure 10 In the figure, the display substrate 11 is taken as an example to include a substrate 13, a first semiconductor layer ACT1, a first gate insulating layer GI1, a first gate conductive layer GT1, a first interlayer insulating layer ILD1, a second gate conductive layer GT2, a second gate insulating layer GI2, a second semiconductor layer ACT2, a third gate insulating layer GI3, a third gate conductive layer GT3, a second interlayer insulating layer ILD2, a first source and drain conductive layer SD1, a first flat layer PLN1, a second source and drain conductive layer SD2, a second flat layer PLN2, a first electrode layer 14, a pixel defining layer 15, a spacer layer 16, a light-emitting functional layer 17 and a second electrode layer 18 which are arranged in sequence.

[0091] On this basis, the length of the first barrier adhesive 121 along the second direction Y can be, for example, less than or equal to 240 μm; that is, the distance between the top and bottom ends of the first barrier adhesive 121 away from the bending adhesive 110 along the second direction Y is less than or equal to 120 μm. For example, the length of the first barrier adhesive 121 along the second direction Y is any one of 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, and 240 μm; and / or the distance between the top and bottom ends of the first barrier adhesive 121 along the second direction Y away from the bending adhesive 110 is any one of 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm, and 120 μm.

[0092] At this time, compared with the related art, the distance between the top and bottom ends of the first barrier adhesive 121 on the side away from the bending adhesive 110 in the embodiment of the present disclosure is shortened, so that the total length of the first barrier adhesive 121 and the bending adhesive 110 in the second direction Y can be shortened by at least 230 μm. In this way, the frame of the display device 1000 corresponding to the binding circuit board 400 ( Figure 1 The length of the lower frame in the second direction Y can be reduced by at least 230 μm, thereby reducing the display device 1000 (see Figure 1 ) of the lower frame, improving the display device 1000 (see Figure 1 ) for the purpose of increasing the screen ratio.

[0093] In addition, the surface energy of the first barrier adhesive 121 is greater than the surface energy of the bending adhesive 110. The bending adhesive 110 is spread over a larger area on the display panel 10, which is beneficial for reducing the thickness of the bending adhesive 110 in the third direction Z, thereby reducing the frame of the display device 1000 corresponding to the binding circuit board 400 ( Figure 1 The length of the lower border in the second direction Y.

[0094] It should be noted that the third direction Z is perpendicular to the main body 101 , that is, the third direction Z is perpendicular to the plane defined by the first direction X and the second direction Y.

[0095] For example, see Figure 5 The surface energy of the bending adhesive 110 is smaller than the surface energy of the film layer in the display panel 10 that contacts the bending adhesive 110, thereby increasing the spreading area of ​​the bending adhesive 110 formed on the display panel 10 by the inkjet printing process and reducing the thickness of the bending adhesive 110, thereby reducing the distance between the bending axis and the outer surface of the bending adhesive 110, and reducing the frame of the display device 1000 corresponding to the binding circuit board 400 ( Figure 1 ).

[0096] For example, Figure 10 As shown, the display panel 10 includes a display substrate 11 and an encapsulation layer 12 for encapsulating the display substrate 11. The encapsulation layer 12 is disposed on the display substrate 11 to prevent moisture and oxygen from the external environment from entering the display panel 10, thereby shortening the service life of the display panel 10. Here, the film layer in the display panel 10 that contacts the bending adhesive 110 is the encapsulation layer 12, that is, the surface energy of the bending adhesive 110 is lower than the surface energy of the encapsulation layer 12.

[0097] On this basis, along the third direction Z, the thickness of the bending adhesive 110 may be, for example, 30 μm to 70 μm, for example, the thickness of the bending adhesive 110 is any one of 30 μm, 40 μm, 50 μm, 60 μm and 70 μm.

[0098] At this time, compared with the related art, the thickness of the bending adhesive 110 of the display device 1000 of the present disclosure is reduced, so that the thickness of the bending adhesive 110 can be reduced by at least 15 μm, so that the display device 1000 corresponds to the frame of the binding circuit board 400 in the second direction Y ( Figure 1 The lower border in the image can be further reduced by at least 15μm.

[0099] In some embodiments, see Figure 5 The blocking adhesive 120 further includes a second blocking adhesive 122 , and the bending adhesive 110 is located between the first blocking adhesive 121 and the second blocking adhesive 122 .

[0100] The surface energy of the second barrier adhesive 122 is greater than the surface energy of the bending adhesive 110. It should be understood that the greater the surface energy of the adhesive, the smaller the area of ​​the adhesive of the same mass spread on the display panel 10 before curing. In other words, the smaller the area of ​​the second barrier adhesive 122 spread on the display panel 10, the shorter the length of the second barrier adhesive 122 in the second direction Y, thereby reducing the frame of the display device 1000 corresponding to the bound circuit board 400 ( Figure 1 The length of the lower border in the second direction Y.

[0101] For example, see Figure 5 The surface energy of the second barrier glue 122 is greater than the surface energy of the film layer in the display panel 10 that contacts the second barrier glue 122, so as to reduce the spreading area of ​​the second barrier glue 122 formed on the display panel 10 by the inkjet printing process, thereby shortening the length of the second barrier glue 122 in the second direction Y.

[0102] For example, Figure 10As shown, the display panel 10 includes a display substrate 11 and an encapsulation layer 12 for encapsulating the display substrate 11. The encapsulation layer 12 is disposed on the display substrate 11 to prevent moisture and oxygen from the external environment from entering the display panel 10, thereby shortening the service life of the display panel 10. Here, the film layer in the display panel 10 that contacts the second barrier adhesive 122 is the encapsulation layer 12, that is, the surface energy of the second barrier adhesive 122 is greater than the surface energy of the encapsulation layer 12.

[0103] On this basis, the length of the second barrier adhesive 122 along the second direction Y can be, for example, less than or equal to 240 μm; that is, the distance between the top and bottom ends of the second barrier adhesive 122 away from the bending adhesive 110 along the second direction Y is less than or equal to 120 μm. For example, the length of the second barrier adhesive 122 along the second direction Y is any one of 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, and 240 μm; and / or the distance between the top and bottom ends of the second barrier adhesive 122 along the second direction Y away from the bending adhesive 110 is any one of 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm, and 120 μm.

[0104] At this time, compared with the related art, the distance between the top and bottom of the first barrier glue 121 and the second barrier glue 122 on the side away from the bending glue 110 in the embodiment of the present disclosure is shortened, so that the total length of the first barrier glue 121, the second barrier glue 122 and the bending glue 110 in the second direction Y can be shortened by at least 460 μm. In this way, the frame of the display device 1000 corresponding to the binding circuit board 400 ( Figure 1 The length of the lower border in the second direction Y can be reduced by at least 460μm.

[0105] The thickness of the barrier adhesive 120 along the third direction Z can be 30 μm to 70 μm. For example, the thickness of the barrier adhesive 120 is any one of 30 μm, 40 μm, 50 μm, 60 μm, and 70 μm. The thickness of the first barrier adhesive 121 and the second barrier adhesive 122 can be the same or different, and this is not specifically limited in the present embodiment.

[0106] In some embodiments, as Figure 5 As shown, the barrier adhesive 120 includes a main material and a dopant material. The main material is the same as the material of the bending adhesive 110. Furthermore, the dopant material has a larger specific surface area than the main material, so that the surface energy of the barrier adhesive 120 is greater than the surface energy of the bending adhesive 110. The specific surface area of ​​the dopant material can be, for example, greater than or equal to 200.

[0107] For example, the host material includes a polypropylene-based organic compound, such as acrylic acid. The doping material includes a thickener, such as silica and / or cyanide. Furthermore, the doping ratio of the doping material can be 3% to 5%, for example, any one of 3%, 4%, and 5%.

[0108] At this point, the shear, peel, and tensile strengths of barrier adhesive 120 and bending adhesive 110 are roughly equal, with a difference in elongation at break of less than or equal to 20%, a difference in hardness of less than or equal to 40%, and a significant difference in viscosity. For example, barrier adhesive 120 has a hardness of approximately 43A, an elongation at break of approximately 170%, an elastic modulus of approximately 7.5 MPa, a thixotropic index of approximately 2.25, and a viscosity greater than or equal to 2000 cps. Bending adhesive 110 has a hardness of approximately 30A, an elongation at break of approximately 168%, an elastic modulus of approximately 4.7 MPa, a thixotropic index of approximately 1.2, and a viscosity of approximately 800 cps.

[0109] Based on the above, there is not much difference in the mechanical properties between the barrier adhesive 120 and the bending adhesive 110. That is, when the barrier adhesive 120 and the bending adhesive 110 provide good protection for the display panel 10, the viscosity of the barrier adhesive 120 can be increased, the spreading area of ​​the barrier adhesive 120 can be reduced, and the length of the barrier adhesive 120 in the second direction Y can be reduced, thereby reducing the frame of the display device 1000 corresponding to the binding circuit board 400 ( Figure 1 The purpose of the length of the lower border in the second direction Y).

[0110] Furthermore, the barrier adhesive 120 is primarily made of the same material as the bending adhesive 110, which improves the connection reliability between the barrier adhesive 120 and the bending adhesive 110 and prevents delamination between the barrier adhesive 120 and the bending adhesive 110. Furthermore, the barrier adhesive 120 can be manufactured from the same material and equipment as the bending adhesive 110, reducing the number of materials in the bill of materials and lowering manufacturing costs.

[0111] In some embodiments, see Figure 5 and Figure 6, along the third direction Z, the thickness of the first barrier glue 121 and the second barrier glue 122 is greater than or equal to the thickness of the bending glue 110. For example, along the third direction Z, the thickness of the barrier glue 120 is 0 μm to 40 μm greater than the thickness of the bending glue 110. In this case, during the process of preparing the first barrier glue 121, the second barrier glue 122, and the bending glue 110, the first barrier glue 121 and the second barrier glue 122 can be formed first. The first barrier glue 121 and the second barrier glue 122 can be formed sequentially through the dispensing and curing processes. Due to the large surface energy of the first barrier glue 121 and the second barrier glue 122, after the dispensing process, the first barrier glue 121 and the second barrier glue 122 will not spread out, thereby avoiding interference with the subsequent process of forming the bending glue 110. Then, the bending glue 110 is formed. The first blocking adhesive 121 and the second blocking adhesive 122 can play a blocking role and can confine the bending adhesive 110 between the first blocking adhesive 121 and the second blocking adhesive 122 to prevent the bending adhesive 110 from overflowing, thereby simplifying the process.

[0112] In other embodiments, see Figure 7 Along the third direction Z, the thickness of the first barrier adhesive 121 and the second barrier adhesive 122 is less than the thickness of the bending adhesive 110. For example, along the third direction Z, the ratio of the thickness of the bending adhesive 110 to the thickness of the barrier adhesive 120 is 1 to 1.02. In this case, the bending adhesive 110 can cover the portion of the first and second barrier adhesives 121 and 122 on the side away from the display panel 10, and will not overflow to the opposite sides of the first and second barrier adhesives 121 and 122, thereby improving the connection reliability of the first and second barrier adhesives 121 and 122 to the bending adhesive 110.

[0113] In some embodiments, see Figure 5 and Figure 6 A distance is provided between the first barrier adhesive 121 and the anti-reflection layer 310 to prevent the first barrier adhesive 121 from climbing along the boundary of the anti-reflection layer 310 and causing a siphon effect. The distance between the first barrier adhesive 121 and the anti-reflection layer 310 can be designed based on the actual product frame and is not specifically limited in the present embodiment.

[0114] In this way, the first barrier adhesive 121 will not be siphoned along the boundary of the anti-reflection layer 310 to the surface of the anti-reflection layer 310 away from the display panel 10, thereby preventing adverse effects during subsequent processes such as the installation of the cover plate 330. Furthermore, the first barrier adhesive 121 will not be siphoned, resulting in uneven film thickness. This allows for more precise control of the thickness of the first barrier adhesive 121, thereby improving the uniformity of the thickness of the first barrier adhesive 121.

[0115] In this document, due to process variations, a distance exists between the first barrier adhesive 121 and the anti-reflection layer 310, including separation of the first barrier adhesive 121 and the anti-reflection layer 310 at all locations in the first direction X. Taking a process variation of ±30 μm as an example, the first barrier adhesive 121 is in contact with the anti-reflection layer 310. This can be understood as, during the formation of the first barrier adhesive 121 and the anti-reflection layer 310, the alignment distance between the boundary of the first barrier adhesive 121 and the anti-reflection layer 310 is set to be greater than 30 μm, so that the minimum distance between the first barrier adhesive 121 and the anti-reflection layer 310 is greater than 0 μm.

[0116] In other embodiments, see Figure 7 and Figure 8 The first barrier adhesive 121 contacts the anti-reflection layer 310 to improve sealing and reduce the risk of water vapor and oxygen in the external environment entering the display panel 10 and thus shortening the service life of the display panel 10.

[0117] In this document, due to process variations, the first barrier adhesive 121 being in contact with the anti-reflection layer 310 includes both contacting the first barrier adhesive 121 and the anti-reflection layer 310 throughout the first direction X and contacting the first barrier adhesive 121 and the anti-reflection layer 310 only partially in the first direction X. Taking a process variation of ±30 μm as an example, the contact between the first barrier adhesive 121 and the anti-reflection layer 310 can be understood as setting the alignment distance between the boundary of the first barrier adhesive 121 and the anti-reflection layer 310 to 30 μm during the formation of the first barrier adhesive 121 and the anti-reflection layer 310 so that the minimum distance between the first barrier adhesive 121 and the anti-reflection layer 310 is equal to 0 μm.

[0118] In some embodiments, as Figure 5 and Figure 7 As shown, the display module 100 further includes a cover plate 330 and a light shielding layer 340 . The cover plate 330 and the light shielding layer 340 are disposed on a side of the anti-reflection layer 310 away from the display panel 10 .

[0119] The cover plate 330 plays a protective role, and the light shielding layer 340 is used to shield the area outside the display area A of the display panel 10 to prevent light leakage.

[0120] In some examples, such as Figure 5 As shown, the cover plate 330 is a single-layer glass cover plate. A light shielding layer 340 can be disposed between the cover plate 330 and the anti-reflection layer 310. The light shielding layer 340 can be formed on the surface of the cover plate 330 near the display panel 10 using a screen printing process. The light shielding layer 340 has a stronger adhesion to the cover plate 330 and is not easily detached.

[0121] In other examples, such as Figure 7As shown, along the third direction Z, and in the direction from the display panel 10 to the cover plate 330, the cover plate 330 includes an inorganic cover plate and / or an organic cover plate. The inorganic cover plate can be a single layer or multiple layers, and the organic cover plate can be a single layer or multiple layers. The material of the inorganic cover plate can include, for example, ultra-thin flexible glass (UTG). The material of the organic cover plate can include, for example, at least one of polyimide, polycarbonate, polyamide, triacetyl cellulose, polymethyl methacrylate, and polyethylene terephthalate (PET).

[0122] For example, Figure 7 As shown, the cover plate 330 includes an ultra-thin flexible glass 331 and a PET plastic layer 332, with the ultra-thin flexible glass 331 located between the PET plastic layer 332 and the anti-reflection layer 310. In this case, the light shielding layer 340 can be formed on the surface of the PET plastic layer 332 near the display panel 10 through a screen printing process. The light shielding layer 340 has a stronger adhesion to the PET plastic layer 332 and is not easily detached.

[0123] It should be noted that the above-mentioned multi-layer inorganic cover plates, or the multi-layer organic cover plates, or the inorganic cover plates and the organic cover plates, as well as the cover plate 330 and the anti-reflection layer 310 can be bonded together by a transparent adhesive layer 350, and the transmittance of the transparent adhesive layer 350 is greater than or equal to 90%. The embodiments of the present disclosure do not specifically limit this.

[0124] In some embodiments, see Figure 5 The display module 100 further includes a back film 70 , which is located on the back side of the display panel 10 . The back film 70 may include, for example, a first sub-back film 71 and a second sub-back film 72 , which are disconnected at the bending portion 102 .

[0125] like Figure 5 and Figure 6 As shown, along the third direction Z, the first sub-back film 71 at least partially overlaps the main body 101 . The second sub-back film 72 at least partially overlaps the binding portion 103 , and the second sub-back film 72 can be bent along the binding portion 103 to the back side 10B of the main body 101 of the display panel 10 .

[0126] In this case, the back film 70 exposes the bending portion 102 of the display panel 10, which can reduce the bending resistance of the bending portion 102 of the display panel 10 and change the position of the force-neutral layer of the bending portion 102 of the display panel 10 during the bending process, thereby avoiding damage to the display panel 10.

[0127] In some examples, such as Figure 5As shown, the orthographic projection of the boundary of the main body portion 101 on the reference surface is within the range of the orthographic projection of the boundary of the first sub-back film 71 on the reference surface, that is, the first sub-back film 71 covers the main body portion 101, and the side of the first sub-back film 71 close to the second sub-back film 72 extends to the bent portion 102. The orthographic projection of the boundary of the binding portion 103 on the reference surface is within the range of the orthographic projection of the boundary of the second sub-back film 72 on the reference surface, that is, the second sub-back film 72 covers the binding portion 103, and the side of the second sub-back film 72 close to the first sub-back film 71 extends to the bent portion 102.

[0128] In this case, during the bending process of the display panel 10, stress concentration at the junction of the main body 101, the bending portion 102 and the binding portion 103 can be avoided, thereby reducing the risk of cracks or breakage of the display panel 10 at the junction of the main body 101, the bending portion 102 and the binding portion 103.

[0129] In some embodiments, as Figure 5 and Figure 7 As shown, the display module 100 further includes a support assembly 80 . The support assembly 80 is disposed on the back side of the main body 101 of the display panel 10 to provide support.

[0130] For example, see Figure 5 and Figure 9 The support assembly 80 may further include a second adhesive layer 81, a first buffer layer 82, a first protective layer 83, and a heat dissipation layer 84 stacked in sequence. The second adhesive layer 81 is directly connected to the first sub-back film 71. The support assembly 80 may also be provided without the first protective layer 83, which is not specifically limited in the present embodiment.

[0131] It should be noted that, for example, an adhesive layer may be provided between the first buffer layer 82 , the first protective layer 83 and the heat dissipation layer 84 , and this embodiment of the present disclosure does not specifically limit this.

[0132] See Figure 5 and Figure 9 The orthographic projection of the second adhesive layer 81 on the main body 101 can be, for example, a grid-like structure. The grid-like structure of the second adhesive layer 81 can prevent bubbles from being generated during the bonding process between the second adhesive layer 81 and the back film 70, thereby avoiding defects such as bulging of the back film 70.

[0133] It should be noted that the material of the second adhesive layer 81 includes a glue layer. For example, the material of the second adhesive layer 81 includes optical glue and / or pressure-sensitive glue, which is not specifically limited in the embodiment of the present disclosure.

[0134] See Figure 9 The first buffer layer 82 mainly plays a role in buffering and shock resistance, so as to improve the display device 1000 (see Figure 1) impact resistance. The first buffer layer 82 can be a single layer or a multi-layered structure, and can include at least one of a polyimide (PI) layer, a PET plastic layer, and a foam layer. For example, the first buffer layer 82 can be composed of both PET plastic and graphite; for example, a support frame can be formed using PET plastic and filled with graphite. In this way, the first buffer layer 82 can also serve as a heat dissipator.

[0135] See Figure 9 The first protective layer 83 mainly plays the role of releasing stress. The first protective layer 83 can produce a certain deformation after being subjected to stress (tensile stress or compressive stress), and release its internal rebound stress through the deformation of the first protective layer 83 itself, so as to reduce the possibility of film separation of the display panel 10.

[0136] See Figure 9 The heat dissipation layer 84 may be a single layer or a multi-layer laminated structure. The heat dissipation layer 84 may include metal; for example, the heat dissipation layer 84 includes at least one of copper, silver and steel. The heat dissipation layer 84 may also include non-metal; for example, the heat dissipation layer 84 includes graphite. The heat dissipation layer 84 may also be connected to the housing 200 (see Figure 3 ) is electrically connected, the heat dissipation layer 84 can conduct heat or charge to the housing 200 (see Figure 3 ), the heat dissipation layer 84 is grounded, which is beneficial to the heat dissipation of the heat dissipation layer 84.

[0137] In some embodiments, as Figure 5 and Figure 6 As shown, the display module 100 may further include a connection pad 90, which may be disposed, for example, on a side of the binding portion 103 close to the main body 101 of the display panel 10. One end of the connection pad 90 is connected to the second sub-back film 72, and the other end is connected to the support assembly 80 to fix the binding portion 103 of the display panel 10.

[0138] Some embodiments of the present disclosure also provide a method for preparing a display module, such as Figure 11 As shown, the preparation method includes S100 to S300.

[0139] S100: See Figure 14 , a display panel 10 is provided.

[0140] In the above steps, if Figure 4 and Figure 14As shown, the display panel 10 has a display side 10A and a back side 10B disposed opposite each other. The display panel 10 includes a main portion 101, a bending portion 102, and a binding portion 103, which are sequentially connected. The bending portion 102 is located between the main portion 101 and the binding portion 103. The main portion 101 has a display area A. The bending portion 102 can bend toward the back side of the main portion 101 along a bending axis extending in a first direction X, so that the binding portion 103 is bent to the back side of the main portion 101. The bending portion 102 includes a first transition region M1, a second transition region M2, and a bending region M3 located between the first transition region M1 and the second transition region M2. The first transition region M1 is adjacent to the main portion 101.

[0141] S200: See Figure 14 , an anti-reflection layer 310 is formed on the display side 10A of the display panel 10 .

[0142] In the above steps, if Figure 4 and Figure 14 As shown, the anti-reflection layer 310 is provided on the display side of the display panel 10 and is located on the main body 101. The anti-reflection layer 310 may be a polarizer, and protective films may be attached to both sides of the polarizer. In S200, the protective film on one side of the anti-reflection layer 310 may be torn off first, and the surface with the protective film torn off may be aligned and bonded to the display panel 10; after S300, the protective film on the other side may be torn off to facilitate bonding with the cover plate 330 (see Figure 5 )connect.

[0143] S300: See Figure 15 and Figure 16 , a bending adhesive 110 and a blocking adhesive 120 are formed on the display side 10A of the display panel 10 .

[0144] In the above steps, if Figure 15 and Figure 16 As shown, the bending adhesive 110 is disposed on the display side 10A of the display panel 10 and covers the bending region M3. The barrier adhesive 120 is disposed on the display side 10A of the display panel 10 and is connected to the bending adhesive 110. The barrier adhesive 120 may, for example, include a first barrier adhesive 121, which is located between the bending adhesive 110 and the display region A. For example, the first barrier adhesive 121 is located between the bending adhesive 110 and the anti-reflection layer 310. Furthermore, along the second direction Y, the length of the first barrier adhesive 121 is less than or equal to 240 μm.

[0145] In some embodiments, see Figure 12 , S300 includes S310 to S340.

[0146] S310: See Figure 14 , a first adhesive material 121 ′ is formed on the display side 10A of the display panel 10 .

[0147] In the above steps, the first adhesive material 121' is located between the display area A and the bending area M3. For example, the first adhesive material 121' is located between the anti-reflection layer 310 and the bending area M3. The viscosity of the first adhesive material 121' can be greater than or equal to 2000 cps. Exemplarily, the viscosity of the first adhesive material 121' can be 2000 cps to 4000 cps. For example, the viscosity of the first adhesive material 121' can be any one of 2000 cps, 2200 cps, 2400 cps, 2500 cps, 2800 cps, 3000 cps, 3300 cps, 3500 cps, 3600 cps, 3800 cps, and 4000 cps. In addition, the contact angle of the first adhesive 121 ′ may be, for example, greater than or equal to π / 2, so as to reduce the area of ​​the first adhesive 121 ′ spread on the display panel 10 .

[0148] In some examples, S310 may specifically use a direct write valve. Under a printing pressure of 20 Psi to 40 Psi, taking a printing needle valve diameter of 65 μm and a printing speed of 20 mm / s as an example, the edge of the anti-reflection layer 310 is visually captured, the alignment distance between the printing needle valve and the anti-reflection layer 310 is set to 30 μm, and printing is performed based on the edge of the anti-reflection layer 310. The printing thickness may be, for example, less than or equal to 40 μm, and the printing thickness may be adjusted by the amount of glue printed.

[0149] S320: See Figure 14 and Figure 15 , solidifying the first adhesive material 121 ′ to form a first barrier adhesive 121 .

[0150] In the above steps, the first adhesive material 121 ′ may be cured under light with a curing energy of 400 mJ to 1000 mJ, an illumination of 100 mW to 400 mW, and a wavelength of 365 nm to 395 nm.

[0151] S330: See Figure 15 and Figure 16 , a second adhesive material 110 ′ is formed on the display side 10A of the display panel 10 .

[0152] In the above steps, the second adhesive material 110' is located on the side of the first barrier adhesive material 121 away from the display area A. For example, the second adhesive material 110' is located on the side of the first barrier adhesive material 121 away from the anti-reflection layer 310 and covers the bending area M3. The viscosity of the second adhesive material 110' is less than the viscosity of the first adhesive material 121'. Exemplarily, the viscosity of the second adhesive material 110' can be less than or equal to 1000 cps. For example, the viscosity of the second adhesive material 110' can be 600 cps to 1000 cps. For example, the viscosity of the second adhesive material 110' can be any one of 600 cps, 650 cps, 700 cps, 750 cps, 800 cps, 850 cps, 900 cps, 950 cps, and 1000 cps.

[0153] In some examples, S330 may specifically use a piezoelectric valve with a valve diameter of 100 μm, set the printing height between the piezoelectric valve and the display panel 10 to 1 mm for printing at a voltage of 330 V and a printing speed of 100 mm / s. The amount of glue printed can be obtained according to the following formula:

[0154] T=((H*L)*W).

[0155] The amount of glue printed by the piezoelectric valve is T, the width of the display panel 10 in the first direction X is W, the thickness of the blocking glue 120 is H, and the average distance between the first blocking glue 121 and the second blocking glue 122 is L.

[0156] S340: See Figure 15 and Figure 16 , and solidify the second adhesive material 110 ′ to form the bending adhesive 110 .

[0157] In the above steps, the second adhesive material 110 ′ may be cured under light with a curing energy of 1000 mJ to 2000 mJ, an illumination of 200 mW to 400 mW, and a wavelength of 365 nm to 395 nm.

[0158] In some embodiments, between S310 and S320, refer to Figure 13 , S300 also includes S350.

[0159] S350: See Figure 14 and Figure 15 , a third adhesive material 122 ′ is formed on the display side 10A of the display panel 10 .

[0160] In the above steps, the third adhesive material 122' is located on the side of the bending region M3 away from the first transition region M1. Here, the material of the third adhesive material 122' can be the same as that of the first adhesive material 121'. During S320, the third adhesive material 122' is also cured to form the second barrier adhesive 122. That is, the first adhesive material 121' and the third adhesive material 122' are cured in the same process step, which can simplify the process flow and reduce production costs. The bending adhesive 110 is located between the first barrier adhesive 121 and the second barrier adhesive 122. Furthermore, along the second direction Y, the length of the second barrier adhesive 122 is less than or equal to 240 μm.

[0161] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display module, characterized in that: include: A display panel having a display side and a back side disposed opposite to each other; the display panel comprises a main portion, a bent portion, and a binding portion connected in sequence, the bent portion being located between the main portion and the binding portion; the main portion having a display area; the bent portion being bendable along a bending axis extending in a first direction toward the back side of the main portion, such that the binding portion is bent toward the back side of the main portion; the bent portion comprising a first transition region, a second transition region, and a bending region located between the first transition region and the second transition region, the first transition region being adjacent to the main portion; A bending adhesive is provided on the display side of the display panel and covers the bending area; A barrier glue is arranged on the display side of the display panel and connected to the bending glue; the barrier glue includes a first barrier glue, the first barrier glue is located between the bending glue and the display area; and, along the second direction, the length of the first barrier glue is less than or equal to 240 μm; the second direction is perpendicular to the first direction and parallel to the main body.

2. The display module according to claim 1, wherein: The barrier glue further includes a second barrier glue, and the bending glue is located between the first barrier glue and the second barrier glue; and along the second direction, the length of the second barrier glue is less than or equal to 240 μm.

3. The display module according to claim 2, wherein: Along the third direction, the thickness of the blocking adhesive is greater than or equal to the thickness of the bending adhesive; and the third direction is perpendicular to the main body.

4. The display module according to claim 3, wherein: Along the third direction, the thickness of the blocking adhesive is 0 μm to 40 μm greater than the thickness of the bending adhesive.

5. The display module according to claim 1, wherein: Along the third direction, a ratio of the thickness of the bending adhesive to the thickness of the blocking adhesive is 1 to 1.02; and the third direction is perpendicular to the main body.

6. The display module according to claim 1, wherein: The thickness of the barrier adhesive is 30 μm to 70 μm; and / or the thickness of the bending adhesive is 30 μm to 70 μm.

7. The display module according to claim 1, wherein: Along the second direction, a distance between a top end and a bottom end of a side of the blocking adhesive away from the bending adhesive is less than or equal to 120 μm.

8. The display module according to any one of claims 1 to 7, wherein: The surface energy of the barrier adhesive is greater than the surface energy of the bending adhesive.

9. The display module according to claim 8, wherein: The surface energy of the barrier adhesive is greater than the surface energy of the film layer in contact with the barrier adhesive in the display panel; and / or the surface energy of the bending adhesive is less than the surface energy of the film layer in contact with the bending adhesive in the display panel.

10. The display module according to claim 8, wherein: The material of the barrier adhesive includes a main material and a doping material, wherein the main material is the same as the material of the bending adhesive; and the specific surface area of ​​the doping material is greater than the specific surface area of ​​the main material.

11. The display module according to claim 10, wherein: The specific surface area of ​​the doping material is greater than or equal to 200.

12. The display module according to any one of claims 1 to 7, wherein: Also includes: a cover plate, disposed on the display side of the display panel and covering the main body; The anti-reflection layer is arranged between the main body of the display panel and the cover plate; the first barrier adhesive is located between the anti-reflection layer and the bending adhesive.

13. A display device, characterized in that: include: The display module according to any one of claims 1 to 12; The display module is arranged in the housing.

14. A method for preparing a display module, characterized in that: include: providing a display panel; The display panel has a display side and a back side that are oppositely arranged; the display panel includes a main body portion, a bending portion, and a binding portion that are sequentially connected, the bending portion being located between the main body portion and the binding portion; the main body portion has a display area; the bending portion can be bent along a bending axis extending in a first direction toward the back side of the main body portion, so that the binding portion is bent to the back side of the main body portion; the bending portion includes a first transition region, a second transition region, and a bending region located between the first transition region and the second transition region, the first transition region being adjacent to the main body portion; A bending glue and a blocking glue are formed on the display side of the display panel; the bending glue covers the bending area; the blocking glue is connected to the bending glue; the blocking glue includes a first blocking glue, and the first blocking glue is located between the bending glue and the display area; and, along the second direction, the length of the first blocking glue is less than or equal to 240 μm; the second direction is perpendicular to the first direction and parallel to the main body.

15. The method for preparing a display module according to claim 14, wherein: The forming of bending glue and blocking glue on the display side of the display panel includes: forming a first adhesive material on the display side of the display panel; the first adhesive material is located between the display area and the bending area; curing the first adhesive material to form the first barrier adhesive; forming a second adhesive material on the display side of the display panel; the second adhesive material is located on a side of the first barrier adhesive away from the display area and covers the bending area; the viscosity of the second adhesive material is less than that of the first adhesive material; The second adhesive material is cured to form the bending adhesive.

16. The method for preparing a display module according to claim 15, wherein: Between forming the first adhesive material on the display side of the display panel and curing the first adhesive material, forming the bending adhesive and the blocking adhesive on the display side of the display panel further includes: forming a third adhesive material on the display side of the display panel; the third adhesive material is located on a side of the bending region away from the first transition region; During the curing process of the first adhesive material, the third adhesive material is also cured to form a second barrier adhesive; the bending adhesive is located between the first barrier adhesive and the second barrier adhesive; and, along the second direction, the length of the second barrier adhesive is less than or equal to 240 μm.

Images