Display module, preparation method thereof and display device

Abstract

The application relates to a display module and a preparation method thereof and a display device, which comprises a display panel, a light-transmitting piece arranged on the light-emitting side of the display panel, and a bonding layer located between the display panel and the light-transmitting piece, wherein the bonding layer comprises a transparent layer and a light-blocking layer, the transparent layer is located in a display area, and the light-blocking layer is located in a non-display area; wherein a microstructure part is arranged on the light-transmitting piece in the non-display area, and the microstructure part is used for bonding the light-blocking layer. According to the application, the microstructure part is arranged on the light-transmitting piece in the non-display area, the contact area with the light-blocking layer is increased by using the microstructure part, the light-blocking layer is tightly bonded, the stability of the light-blocking layer in the non-display area can be effectively solved, the risk of deformation or falling of the light-blocking layer is greatly reduced, and the yield rate of products in the manufacturing process is improved.

Description

Technical Field

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

[0002] The display panel of a monitor has a cover plate on top. The cover plate includes a display area in the center, a non-display area around the display area, and an ink layer printed on the non-display area. During the manufacturing process of the display panel, an ink layer needs to be applied to the non-display area on the inner wall of the cover plate beforehand. Then, an OCA (Optically Clear Adhesive) optical adhesive layer is applied to the inner surface of the display area and the ink. The cover plate is then bonded to the display panel using the OCA optical adhesive layer.

[0003] However, due to the presence of the ink layer, there is an ink gap between the display area and the non-display area of ​​the cover plate. When OCA optical adhesive is bonded to the display area and the ink layer, air bubbles will appear in the display area, affecting the display effect. The thinner the OCA optical adhesive layer, the weaker its ability to fill the ink gap, and the higher the defect rate of bonding air bubbles in the display area.

[0004] Currently, OCR (Optical Clear Resin) adhesive is used to bond the display panel and cover plate. However, because the area provided by the cover plate for OCR adhesive coating in the non-display area is small, and the adhesion between the OCR adhesive and the cover plate is insufficient, it is difficult to make the OCR adhesive in the non-display area exist stably, which causes the OCR adhesive to deform and results in low product yield. Summary of the Invention

[0005] Therefore, it is necessary to provide a display module and its manufacturing method, as well as a display device, in order to solve the problem of insufficient adhesion between the OCR adhesive and the cover plate in the non-display area, and the unstable deformation of the OCR adhesive, which leads to low product yield.

[0006] In a first aspect, embodiments of this application provide a display module, the display module having a display area and a non-display area; the display module includes:

[0007] Display panel;

[0008] A light-transmitting element is disposed on the light-emitting side of the display panel;

[0009] An adhesive layer is located between the display panel and the light-transmitting element. The adhesive layer includes a transparent layer and a light-shielding layer. The transparent layer is located in the display area, and the light-shielding layer is located in the non-display area.

[0010] The light-transmitting component located in the non-display area is provided with a microstructure portion, which is used to adhere the light-shielding layer.

[0011] Secondly, this application also provides a method for manufacturing a display module, applied to the display module in the above embodiments, the method comprising:

[0012] A light-transmitting element is provided, and a microstructure is provided in the non-display area of ​​the light-transmitting element;

[0013] A first liquid optical adhesive is disposed in the non-display area of ​​the light-transmitting component to bond the first liquid optical adhesive through the microstructure portion, and a second liquid optical adhesive is disposed in the display area of ​​the light-transmitting component; wherein, the first liquid optical adhesive includes a light-shielding material;

[0014] A display panel is provided, and the display panel is attached to the light-transmitting element.

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

[0016] The display panel provided in this application avoids the OCA optical adhesive bonding bubble problem caused by ink gaps in conventional technologies by setting a transparent layer located in the display area and a light-shielding layer located in the non-display area between the display panel and the light-transmitting component. Furthermore, by setting microstructures on the light-transmitting component in the non-display area, the microstructures increase the contact area with the light-shielding layer to achieve tight adhesion. This configuration can effectively solve the stability problem of the light-shielding layer in the non-display area, greatly reduce the risk of deformation or detachment of the light-shielding layer, improve the yield rate of the product during the manufacturing process, reduce production costs, and improve production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a planar structure of a display module provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of a display module provided in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of another display module provided in an embodiment of this application.

[0020] Figure 4 This is a schematic flowchart illustrating the method for fabricating a display module according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the structure of a display module during the manufacturing process, as provided in an embodiment of this application.

[0022] Figure 6This is a schematic diagram of the structure of another display module provided in the embodiment of this application during the manufacturing process.

[0023] Figure 7 This is a cross-sectional schematic diagram of a dam during its construction process, provided as an embodiment of this application.

[0024] Figure 8 This is a cross-sectional schematic diagram of another type of dam being constructed during the preparation process, as provided in an embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the structure of another display module provided in the embodiment of this application during the manufacturing process. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] When describing positional relationships, unless otherwise specified, when an element, such as a layer, film, or substrate, is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more intermediate elements present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more intermediate elements present.

[0029] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0030] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0031] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0032] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0033] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0034] As described in the background section, in related technologies, when display panels and cover plates are bonded, the OCR adhesive in the non-display area is unstable, leading to low product yield. The inventors discovered that this phenomenon occurs because, due to the presence of the ink layer, there is an ink gap between the display area and the non-display area of ​​the cover plate. When OCA optical adhesive is bonded to the display area and the ink layer, air bubbles appear in the display area, affecting the display effect. The thinner the OCA optical adhesive layer, the weaker its ability to fill the ink gap, and the higher the defect rate of bonding air bubbles in the display area. When OCR adhesive is used to bond the display panel and cover plate, the area provided by the cover plate for OCR adhesive coating in the non-display area is small, and the adhesion between the OCR adhesive and the cover plate is insufficient. Therefore, it is difficult to ensure the stable presence of the OCR adhesive in the non-display area, causing OCR adhesive deformation and resulting in low product yield.

[0035] Based on the aforementioned technical problems, the inventors discovered that by providing microstructures on the light-transmitting component located in the non-display area, the stability of the OCR adhesive in the non-display area can be improved. Based on this, the inventors further developed the technical solution of the embodiments of this application. Specifically, the display module provided in the embodiments of this application includes a display panel, a light-transmitting component, and an adhesive layer. The light-transmitting component is disposed on the light-emitting side of the display panel; the adhesive layer is located between the display panel and the light-transmitting component, and the adhesive layer includes a transparent layer and a light-shielding layer. The transparent layer is located in the display area, and the light-shielding layer is located in the non-display area; wherein, a microstructure is provided on the light-transmitting component located in the non-display area, and the microstructure is used to adhere the light-shielding layer.

[0036] By adopting the above technical solution, a transparent layer located in the display area and a light-shielding layer located in the non-display area are respectively set between the display panel and the light-transmitting component, so as to avoid the problem of OCA optical adhesive bonding bubbles caused by ink gaps in traditional technology; and by setting microstructures on the light-transmitting component in the non-display area, the contact area with the light-shielding layer is increased by the microstructures to achieve tight adhesion with the light-shielding layer. This setting can effectively solve the stability problem of the light-shielding layer in the non-display area, greatly reduce the risk of deformation or detachment of the light-shielding layer, improve the yield rate of the product in the manufacturing process, reduce production costs, and improve production efficiency.

[0037] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] Figure 1 This is a schematic diagram of a planar structure of a display module provided in an embodiment of this application. Figure 2 This is a schematic diagram of the cross-sectional structure of a display module provided in an embodiment of this application. Figure 3 This is a schematic cross-sectional view of another display module provided in an embodiment of this application. (In conjunction with...) Figures 1 to 3 As shown, the display module provided in this application embodiment has a display area and a non-display area. The display module may include a display panel 100, a light-transmitting element 200, and an adhesive layer 300.

[0039] The light-transmitting element 200 is disposed on the light-emitting side of the display panel 100; the bonding layer 300 is located between the display panel 100 and the light-transmitting element 200, and the bonding layer 300 includes a transparent layer 310 and a light-shielding layer 320. The transparent layer 310 is located in the display area, and the light-shielding layer 320 is located in the non-display area; wherein, the light-transmitting element 200 located in the non-display area is provided with a microstructure portion 321, which is used to bond the light-shielding layer 320.

[0040] It is understood that the display panel 100 can be of various types, such as an OLED (Organic Light-Emitting Diode) display panel 100, a liquid crystal display panel 100, etc., which will not be specifically described here. As the core component of the display module, the display panel 100 can control the light-emitting state of the pixels through electrical signals, thereby realizing the display of images. In this embodiment, the display module is divided into a display area and a non-display area. The display area is mainly used to present visual information such as images and text, and is the part used to directly observe and obtain the displayed content; the non-display area is located on the outer periphery of the display area and is usually used to accommodate non-display related components such as bezels, circuit traces, and sensors, and does not directly participate in the image display function.

[0041] In addition, the light-transmitting component 200 is a transparent component disposed on the light-emitting side of the display panel 100, used to protect the display panel 100 and ensure that the light emitted by the display panel 100 can pass through smoothly and reach the user's eyes. In this embodiment, the light-transmitting component 200 can be a polarizer (POL), a lens, or a cover plate, and there is no limitation.

[0042] The bonding layer 300 is located between the display panel 100 and the light-transmitting component 200, and is used to firmly bond the two together. The bonding layer 300 is divided into a transparent layer 310 and a light-shielding layer 320. The transparent layer 310 ensures good light transmission in the display area, while the light-shielding layer 320 blocks light from the non-display area to prevent light leakage. The transparent layer 310 can be made of liquid optical clear resin (OCR), which has high light transmittance and ensures clear display of content. The light-shielding layer 320 can be made of OCR adhesive containing pigments. For example, OCR acrylic adhesive can be colored by adding pigments, dyes, and toners. Specifically, pigments are colored substances insoluble in the medium that can mix with the medium to form a colored substance; dyes are substances that can dissolve in the medium and exhibit color; and toners are substances that can adjust the depth and hue of the color. The addition of these additives can change the color of the OCR acrylic adhesive to meet different needs by color-matching the adhesive to replace ink.

[0043] In this embodiment, the microstructure portion 321 is disposed on the light-transmitting element 200 in the non-display area. Specifically, the microstructure portion 321 is a specific structure disposed on the light-transmitting element 200 in the non-display area. It is a structure with tiny protrusions, grooves or other shapes on the surface. More specifically, the microstructure portion 321 may include a groove array, a frosted rough surface, micro-pillars, etc., to enhance the contact area and adhesion strength with the light-shielding layer 320, so as to ensure that the light-shielding layer 320 can be firmly attached to the light-transmitting element 200.

[0044] In this embodiment, the display panel 100 is located at the bottom layer, the light-transmitting element 200 covers its light-emitting side, and the bonding layer 300 is sandwiched between the display panel 100 and the light-transmitting element 200, including a transparent layer 310 and a light-shielding layer 320. The microstructure portion 321 is disposed on the inner surface of the non-display area of ​​the light-transmitting element 200, directly contacting and mechanically engaging with the light-shielding layer 320. The light-shielding layer 320 is fixed to the light-transmitting element 200 by the microstructure portion 321, which can prevent the adhesive from shifting or peeling off. In other words, the provision of the microstructure portion 321 increases the contact area and mechanical interlocking effect (e.g., groove fitting) between the light-shielding layer 320 and the light-transmitting element 200, significantly improving the peel strength of the light-shielding layer 320.

[0045] Of course, in addition to the structure formed on the surface of the light-transmitting element 200, the microstructure 321 may also include an adhesive coating. The adhesive coating may be a polymer coating containing special functional groups, so as to react chemically with the material of the light-shielding layer 320 or form a stronger physical adsorption effect, so as to significantly enhance the adhesion strength between the microstructure 321 and the light-shielding layer 320, further reduce the risk of deformation or detachment of the light-shielding layer 320 in the non-display area, thereby improving the product yield and reliability of the display module.

[0046] In summary, the display module provided in this application avoids the OCA optical adhesive bonding bubble problem caused by ink gaps in conventional technologies by setting a transparent layer 310 located in the display area and a light-shielding layer 320 located in the non-display area between the display panel 100 and the light-transmitting element 200. Furthermore, by setting microstructures 321 on the light-transmitting element 200 in the non-display area, the microstructures 321 increase the contact area with the light-shielding layer 320, achieving tight adhesion. This arrangement effectively solves the stability problem of the light-shielding layer 320 in the non-display area, greatly reducing the risk of deformation or detachment of the light-shielding layer 320, improving the yield rate during manufacturing, reducing production costs, and increasing production efficiency. Overall, the systematic operation of each component in the display module enables it to maintain stable performance when facing environmental factors such as external impacts, temperature changes, and humidity effects, enhancing the reliability and durability of the display module.

[0047] Below, we will combine the appendix Figure 1 - Appendix Figure 3 The specific structure of the display module provided in the embodiments of this application will be described.

[0048] like Figure 2 and Figure 3 As shown, in some embodiments, the microstructure portion 321 includes at least one groove formed on the surface of the light-transmitting member 200 facing the display panel 100.

[0049] It is understood that the microstructure part 321 is a physical recessed structure formed on the surface of the light-transmitting element 200 facing the display panel 100, used to mechanically fix the light-shielding layer 320. Multiple grooves are only distributed on the inner surface of the non-display area of ​​the light-transmitting element 200, and are in direct contact with the light-shielding layer 320. The opening direction of the groove can be perpendicular to the plane of the light-transmitting element 200, and the depth direction is consistent with the stacking direction.

[0050] The formation of the groove on the light-transmitting element 200 can be achieved by pulse processing such as ultraviolet laser, or by selective etching and peeling off the light-transmitting element 200 using hydrofluoric acid. The specific formation method is not limited here.

[0051] In this embodiment, the groove design can significantly improve the adhesion strength of the light-shielding layer 320 and effectively reduce the bubble defect rate.

[0052] In some embodiments, the orthographic projection of the groove along the stacking direction of the display panel 100 and the light-transmitting element 200 is annular. Specifically, when viewed from the stacking direction of the display panel 100 and the light-transmitting element 200, the projection of the groove on the plane presents an annular shape. This design facilitates continuous bonding reinforcement around the non-display area. In one example, the depth of the groove is between 50μm and 150μm; specifically, the depth of the groove can be 50μm, 70μm, 90μm, 120μm, 150μm, etc. The depth of the groove refers to the distance from the surface of the light-transmitting element 200 to the bottom of the groove. Of course, the depth of the groove should not be too large or too small, so as to ensure the bonding effect without affecting the overall performance of the light-transmitting element 200.

[0053] In one example, the width of the groove is between 20μm and 100μm. Specifically, the groove width refers to the dimension of the groove perpendicular to its extension direction, and can be 20μm, 40μm, 60μm, 80μm, 100μm, etc. The setting of the groove width can also effectively control the contact area and adhesion strength with the light-shielding layer 320.

[0054] In this embodiment, an annular groove surrounds the surface of the non-display area of ​​the light-transmitting element 200, and a portion of the light-shielding layer 320 fills the annular groove, forming a continuous adhesive structure surrounding the non-display area. The annular groove provides a continuous adhesive area to ensure the stability of the light-shielding layer 320 throughout the non-display area, reducing the risk of light leakage. In addition, a suitable depth and width range ensures appropriate contact area and adhesive strength between the light-shielding layer 320 and the light-shielding layer 320.

[0055] In some embodiments, the microstructure portion 321 includes a frosted surface; the roughness of the frosted surface is uniform, or the roughness of the frosted surface gradually increases in the direction away from the display area.

[0056] It is understandable that a frosted surface refers to a surface on the non-display area of ​​the light-transmitting component 200 that has undergone special treatment to form a surface with a certain roughness. As another form of the microstructure 321, it is used to improve the adhesion with the light-shielding layer 320. Specifically, roughness is used as an indicator to measure the degree of micro-unevenness of the frosted surface. The same roughness indicates that the degree of micro-undulation of the entire frosted surface is consistent. The roughness gradually increases in the direction away from the display area, indicating that the degree of micro-undulation of the frosted surface gradually increases from the direction closer to the display area to the direction farther away from the display area.

[0057] The formation of a frosted surface can be achieved through various processes such as sandblasting, chemical etching, and laser etching.

[0058] Before applying the light-shielding layer 320 to the frosted surface, an adhesion promoter can also be applied to the frosted surface to react chemically with the frosted surface and the light-shielding layer 320 material, further enhancing the adhesion strength between the two.

[0059] In this example, the increased roughness of the friction surface increases the frictional force and actual contact area with the light-shielding layer 320, allowing the light-shielding layer 320 to adhere more firmly to the light-transmitting component 200 and improving product stability. Furthermore, a frosted surface with uniform roughness is suitable for scenarios requiring high bonding uniformity, while a design where the roughness gradually increases away from the display area ensures better optical performance near the display area while enhancing adhesion to the light-shielding layer 320 further away, thus adapting to functional requirements at different locations.

[0060] Of course, this embodiment can also combine the grooves and frosted surfaces described in the above embodiments. Specifically, a frosted surface is used in some areas, and grooves are formed in other areas, so as to make full use of the advantages of the two microstructures and further optimize the adhesion effect with the light-shielding layer 320. For example, a groove structure is used in the edge areas that are prone to greater external forces, while a frosted surface is used in other areas.

[0061] Based on the same concept, this application also provides a method for manufacturing a display module, such as... Figures 4 to 9 As shown, Figure 4 This is a schematic flowchart illustrating the method for fabricating a display module according to an embodiment of this application. Figure 5 This is a schematic diagram illustrating the fabrication process of a display module according to an embodiment of this application. The fabrication method can be applied to the display module in the above embodiments, and the method may include:

[0062] Step S101: A light-transmitting element 200 is provided, and a microstructure portion 321 is provided in the non-display area of ​​the light-transmitting element 200;

[0063] In step S102, a first liquid optical adhesive 330 is applied to the non-display area of ​​the light-transmitting component 200 to bond the first liquid optical adhesive 330 through the microstructure portion 321, and a second liquid optical adhesive 340 is applied to the display area of ​​the light-transmitting component 200; wherein, the first liquid optical adhesive 330 includes a light-shielding material.

[0064] Step S103: Provide a display panel 100 and attach the display panel 100 to the light-transmitting element 200.

[0065] It is understood that in step S101, the light-transmitting component 200 is a transparent component disposed on the light-emitting side of the display panel 100, which can be a POL, Lens, or cover plate, used to protect the display panel 100 and allow light to pass through. The microstructure portion 321, as a specific structure disposed in the non-display area of ​​the light-transmitting component 200, can include forms such as grooves or frosted surfaces, as can be understood with reference to the above embodiments, to enhance the adhesion effect with the subsequently disposed first liquid optical adhesive 330 (containing light-shielding material). Regarding the method of disposing of the microstructure portion 321, grooves can be formed on the surface of the light-transmitting component 200 through processes such as photolithography or etching, or a frosted surface can be formed by methods such as sandblasting or chemical etching.

[0066] In step S102, the first liquid optical adhesive 330, as a liquid optical adhesive containing a light-shielding material, is used to form a light-shielding layer 320 in the non-display area of ​​the light-transmitting component 200, and after curing, it serves to block light. The second liquid optical adhesive 340, as a transparent liquid optical adhesive, is used to form a transparent layer 310 in the display area of ​​the light-transmitting component 200, and after curing, it ensures good light transmission in the display area. The first liquid optical adhesive 330 can be an OCR adhesive with added light-shielding agents such as black pigment; the second liquid optical adhesive 340 is a transparent OCR adhesive. Alternatively, nano-sized light-shielding particles can be added to the first liquid optical adhesive 330 to enhance the light-shielding effect; and nano-sized anti-reflective particles can be added to the second liquid optical adhesive 340 to further improve the light transmittance of the display area.

[0067] After the microstructure portion 321 is formed in step S101, a first liquid optical adhesive 330 is applied to the non-display area to bond it to the microstructure portion 321, and a second liquid optical adhesive 340 is applied to the display area. Alternatively, the second liquid optical adhesive 340 can be applied to the display area first, and then the first liquid optical adhesive 330 can be applied to the non-display area to bond it to the microstructure portion 321. To prevent the second liquid optical adhesive 340 from being too fluid in the display area, it can be pre-cured, i.e., kept in a jelly-like state, not easily flowing, and convenient for subsequent bonding and extrusion to fill gaps. Since the first liquid optical adhesive 330 acts as a barrier, its pre-curing degree needs to be greater than that of the second liquid optical adhesive 340 to prevent deformation and displacement during bonding and extrusion.

[0068] In step S103, the display panel 100 is bonded to the light-transmitting element 200 coated with liquid optical adhesive. At this time, the light-shielding layer 320 formed after the first liquid optical adhesive 330 is cured is located between the display panel 100 and the non-display area of ​​the light-transmitting element 200, that is, the light-shielding layer 320 in the above embodiment is formed. The transparent layer 310 formed after the second liquid optical adhesive 340 is cured is located between the display panel 100 and the display area of ​​the light-transmitting element 200, that is, the transparent layer 310 in the above embodiment is formed.

[0069] In this embodiment, by step-by-step setting of the microstructure portion 321 and liquid optical adhesives with different functions, and then bonding them together, the different structures of the display area and non-display area in the display module can be precisely constructed, ensuring the normal function of the display module. Furthermore, the bonding design between the microstructure portion 321 and the first liquid optical adhesive 330 improves the stability of the light-shielding layer 320 in the non-display area, thereby enhancing product quality.

[0070] like Figure 5 and Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of another display module provided in the embodiment of this application during the manufacturing process. In some embodiments, step S102 may further include: step S1021, applying a first liquid optical adhesive 330 to the non-display area of ​​the cover plate, and curing the first liquid optical adhesive 330 on the surface of the cover plate through a first curing process to form a dam; step S1022, applying a second liquid optical adhesive 340 in the display area of ​​the cover plate, and creating a gap 600 between the second liquid optical adhesive 340 and the dam.

[0071] Understandably, the dam-like structure formed by the first liquid optical adhesive 330 curing in the non-display area of ​​the light-transmitting component 200 restricts the flow range of the second liquid optical adhesive 340 in the display area, while simultaneously enhancing the light-shielding and sealing effects in the non-display area. The specific first curing process can employ methods such as ultraviolet curing or thermal curing.

[0072] In this example, the specific process involves applying a first liquid optical adhesive 330 to the non-display area of ​​the light-transmitting component 200 and forming a dam through a first curing process. The dam surrounds the outer perimeter of the display area. A second liquid optical adhesive 340 is then applied inside the display area, maintaining a certain gap 600 between the second liquid optical adhesive 340 and the dam. When the display panel 100 is bonded to the light-transmitting component 200, the dam serves to block and position the components.

[0073] It is important to note that when applying the second liquid optical adhesive 340 to the display area in this example, a gap 600 must be maintained between the second liquid optical adhesive 340 and the surrounding dam. This gap 600 effectively prevents adhesive overflow and allows the second liquid optical adhesive 340 to be squeezed and moved until it is in close contact with the first liquid optical adhesive 330 when the display panel 100 and the light-transmitting element 200 are bonded together. To achieve the above objectives, the gap 600 needs to be designed. The specific design process is as follows:

[0074] During the bonding process:

[0075] Experimental data show that the stress-strain relationship of the second liquid optical adhesive 340 material follows a power law:

[0076] (1)

[0077] The deformation variables are:

[0078] (2)

[0079] Where h0 is the initial thickness of the second liquid optical adhesive material, F is the bonding pressure, and K is the strength coefficient (Pa·s). n ), where n is the hardening index (n < 1 for softening, n > 1 for hardening).

[0080] During the pressure holding process after bonding:

[0081] If the pressure F remains constant during the bonding process, the second liquid optical adhesive material undergoes creep, and the deformation increases over time.

[0082] (3)

[0083] Where E0 is the instantaneous elastic modulus. The parameters are for the Prony series (fitted by creep tests).

[0084] Therefore, the total deformation of the second liquid optical adhesive is That is, the sum of equations (2) and (3). In this embodiment, the value of gap 600 can be obtained by calculating the total deformation of the second liquid optical adhesive 340.

[0085] In this embodiment, the setting of the dam can precisely control the distribution of the second liquid optical adhesive 340 in the display area and reduce the amount of adhesive overflow. In addition, by reasonably designing the gap 600 between the second liquid optical adhesive 340 and the dam, the amount of adhesive overflow can be further reduced.

[0086] In some embodiments, step S1022 further includes step S10221, in which the viscosity of the second liquid optical adhesive 340 is brought within a preset range by a second curing process, so that the second liquid optical adhesive 340 flows under pressure.

[0087] Specifically, as can be understood from the above embodiments, in order to reduce the fluidity of the second liquid optical adhesive 340 before bonding, its viscosity is increased through a second coating process, so as to achieve a state in which it does not flow easily before bonding, but flows under pressure to fill the gap 600 during bonding. In one example, step S103 may include step S1031, squeezing the display panel 100 and the light-transmitting element 200, so that the second liquid optical adhesive 340 flows under pressure to fill the gap 600.

[0088] The specific process is as follows: First, the viscosity of the second liquid optical adhesive 340 is adjusted to a preset range through a second curing process. Then, the display panel 100 and the light-transmitting component 200 are squeezed. At this time, the second liquid optical adhesive 340 flows under pressure, filling the gap 600 between it and the surrounding dam, achieving a tight bond. Of course, in this process, light pressure can be applied first to allow the second liquid optical adhesive 340 to flow initially and expel some air bubbles, and then heavy pressure can be applied to complete the final bonding.

[0089] In this example, by controlling the viscosity of the second liquid optical adhesive 340 and employing an extrusion flow method to fill the gap 600, the bonding of the display area can be made tighter and more uniform, reducing air bubbles and gaps, and improving the display effect. Furthermore, the second curing process and extrusion parameters can be flexibly adjusted according to different liquid optical adhesives and display module structures to adapt to various production needs.

[0090] like Figure 7 As shown, Figure 7 This is a cross-sectional schematic diagram of a dam during its fabrication process, provided in an embodiment of this application. In some embodiments, the dam includes at least two layers of first liquid optical adhesive 330. Step S1021 further includes: step S10211, depositing a layer of first liquid optical adhesive 330 in the non-display area of ​​the light-transmitting element 200, and curing the first liquid optical adhesive 330 to form a shielding layer through a first curing process; step S10212, depositing another layer of first liquid optical adhesive 330 on the shielding layer, and curing the first liquid optical adhesive 330 to form a shielding layer through a first curing process, and forming a dam by stacking two shielding layers, so that the side of the dam facing the display area has a preset angle.

[0091] Understandably, a first layer of liquid optical adhesive 330 is first applied and cured in the non-display area of ​​the light-transmitting component 200 to form a shielding layer. Then, another layer of first liquid optical adhesive 330 is applied and cured on this shielding layer to form another shielding layer. The two shielding layers are stacked to form a dam. The dam surrounds the display area and is adjacent to the second liquid optical adhesive 340 in the display area. In other words, the dam in this example is formed by stacking multiple shielding layers. This arrangement allows adjustment of the tilt angle of the dam towards the display area, making the tilt angle close to 90°. Figure 7 As shown, the second liquid optical adhesive 340, which is convenient to flow to this location, makes close contact with the side of the dam, which helps to fill the gap 600 between them and improves the bonding quality.

[0092] Furthermore, the dam structure formed by stacking multiple shielding layers in this example has higher strength and can better withstand the pressure and external forces during the bonding process, reducing the risk of dam deformation or breakage. In this example, the first liquid optical adhesive 330 can be applied by spraying, printing, dispensing, etc., but no specific restrictions are imposed.

[0093] like Figure 8 As shown, Figure 8 This is a cross-sectional schematic diagram of another dam provided in an embodiment of this application during its preparation process. In some embodiments, each shielding layer includes at least two rings of first liquid optical adhesive 330. Step S10212 may further include step S102121, which involves setting a ring of first liquid optical adhesive 330 on the side of the non-display area of ​​the light-transmitting element 200 that is close to or far from the display area, and curing the first liquid optical adhesive 330 through a first curing process; and step S102122, which involves setting a ring of first liquid optical adhesive 330 on the other side of the non-display area of ​​the light-transmitting element 200 that is close to or far from the display area, and curing the first liquid optical adhesive 330 through a first curing process to form a shielding layer.

[0094] It is understood that, in the contact of the above embodiments, to further optimize the tilt angle of the dam towards the display area, at least two rings of first liquid optical adhesive 330 are provided in each shielding layer. Specifically, a ring of first liquid optical adhesive 330 is first provided and cured on the side of the non-display area of ​​the light-transmitting element 200 that is close to or far from the display area, and then another ring of first liquid optical adhesive 330 is provided and cured on the other side to form a shielding layer. The two such shielding layers are stacked to form a dam, which surrounds the display area and cooperates with the second liquid optical adhesive 340 of the display area.

[0095] It should be noted that the two rings of the first liquid optical adhesive 330 can be coated adjacently or partially overlapped. The cross-section of the shielding layer formed by the partially overlapping coating is closer to a rectangle.

[0096] This embodiment forms a shielding layer by setting first liquid optical adhesive rings on different sides, which can more flexibly construct the dam structure and improve the adaptability of the dam. In addition, the shielding layer formed by multiple rings of first liquid optical adhesive 330 has better integrity and stability than a single adhesive line, which can better shape the structure of the dam and improve the filling rate of second liquid optical adhesive 340.

[0097] like Figure 5 and Figure 6 As shown, in some embodiments, before the display panel 100 and the light-transmitting element 200 are bonded together, the thickness of the second liquid optical adhesive 340 is equal to the thickness of the first liquid optical adhesive 330; or, the thickness of the second liquid optical adhesive 340 is greater than the thickness of the first liquid optical adhesive 330, and the thickness difference d between the second liquid optical adhesive 340 and the first liquid optical adhesive 330 is between 0.1 μm and 30 μm.

[0098] Specifically, before the display panel 100 and the light-transmitting element 200 are bonded, the thicknesses of the second liquid optical adhesive 340 and the first liquid optical adhesive 330 can be designed and adjusted so that their thicknesses are equal or have a specific thickness difference d. During bonding, the thickness difference between the two will affect the distribution of the second liquid optical adhesive 340 and its effect on filling the gap 600.

[0099] Specifically, the thickness difference d between the second liquid optical adhesive 340 and the first liquid optical adhesive 330 can be 0.1μm, 1μm, 5μm, 10μm, 30μm, etc., but is not limited. Making the thickness of the second liquid optical adhesive 340 greater than the thickness of the first liquid optical adhesive 330 allows it to flow to the dammed area after being squeezed during the bonding process, filling the gap 600mm and resulting in a neater overlap; secondly, it can compensate for curing shrinkage.

[0100] In this embodiment, by reasonably controlling the thickness relationship between the second liquid optical adhesive 340 and the first liquid optical adhesive 330, the uniform distribution of the liquid optical adhesive during the bonding process can be ensured, stress concentration can be reduced, and the optical performance of the display module can be optimized.

[0101] In some embodiments, the curing time of the first curing process is 10s-20s, and the irradiation power is 500 mw / cm². 2 .

[0102] Specifically, the curing time of the first curing process can be set according to the properties of the first liquid optical adhesive 330, and can be 10 s, 15 s, 20 s, etc., but is not limited. Since the first liquid optical adhesive 330 needs to form a dam, its irradiation time can be increased. Similarly, in one example, the curing time of the second curing process is 5s-10s, and the irradiation power is 500 mw / cm². 2Since the second liquid optical adhesive 340 needs to be in a non-flowing state before bonding and be able to be in a creeping state during bonding, the curing time of the second curing process should not be too long, and can be 5 s or 6 s.

[0103] In one example, the gap 600 between the second liquid optical adhesive 340 and the first liquid optical adhesive 330 is between 0.1 μm and 50 μm. Specifically, the gap 600 between the second liquid optical adhesive 340 and the first liquid optical adhesive 330 can be set with reference to the formula in the above embodiment, and no specific limitation is made here.

[0104] In one example, the thickness of the cofferdam is between 6μm and 9μm. Specifically, the thickness of the cofferdam is designed based on improving its structural strength and sealing performance, and can be 6μm, 7μm, 8μm, 9μm, etc., without limitation.

[0105] This embodiment, by specifying the curing time, irradiation power, gap 600, and dam thickness range for different curing processes, enables precise control of the display module manufacturing process, ensuring product quality consistency and stability. Furthermore, appropriate process parameter settings ensure the dam possesses good structural strength and sealing performance, allowing the second liquid optical adhesive 340 to successfully fill the gap 600, thereby improving the optical performance and reliability of the display module.

[0106] like Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of another display module provided in the embodiment of this application during the manufacturing process. In some embodiments, step S102 may further include step S1023, applying a second liquid optical adhesive 340 to the display area of ​​the light-transmitting element 200 and pre-curing the second liquid optical adhesive 340 through a second curing process; step S1024, providing a support film 500, placing the support film 500 on the side of the second liquid optical adhesive 340 away from the light-transmitting element 200, and forming a receiving groove 400 with a portion of the support film 500 and the non-display area of ​​the light-transmitting element 200; step S1025, spraying a first liquid optical adhesive 330 into the receiving groove 400 and curing the first liquid optical adhesive 330 through a first curing process; step S1026, removing the support film 500 and bonding the display panel 100 to the light-transmitting element 200.

[0107] It is understood that the support film 500 in this example serves as a temporary film placed on the side of the second liquid optical adhesive 340 away from the light-transmitting element 200 to assist in forming the receiving groove 400, facilitating the spraying of the first liquid optical adhesive 330. Specifically, the support film 500 can be made of thin film materials with certain flexibility and strength, such as polyethylene terephthalate (PET) or polyethylene (PE). The specific process is as follows: first, the second liquid optical adhesive 340 is coated and pre-cured on the display area of ​​the light-transmitting element 200; then, the support film 500 is placed on the side of the second liquid optical adhesive 340 away from the light-transmitting element 200, so that part of the support film 500 forms the receiving groove 400 with the non-display area of ​​the light-transmitting element 200. The first liquid optical adhesive 330 is sprayed into the receiving groove 400 and cured; finally, the support film 500 is removed, and the display panel 100 is bonded to the light-transmitting element 200. The degree of pre-curing of the second liquid optical adhesive 340 can be set according to the characteristics of the second liquid optical adhesive 340 and the requirements of subsequent processes, and is not limited here.

[0108] In this embodiment, the method of forming the receiving groove 400 with the assistance of the support film 500 is simpler, easier to operate, and improves production efficiency. The receiving groove 400 can more precisely define the position and shape of the first liquid optical adhesive 330, ensuring the quality and stability of the non-display area light-shielding layer 320.

[0109] Based on the same concept, embodiments of this application also provide a display device. For example... Figure 1 As shown, the display device includes the display module in any of the above embodiments. Exemplarily, the display device includes a display module. Therefore, the display device also has the beneficial effects of the display module in the above embodiments. The similarities can be understood with reference to the explanation of the display module above, and will not be repeated below.

[0110] The display device provided in this application embodiment can be a mobile phone or any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. This application embodiment does not make any special limitation in this regard.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display module, characterized in that, The display module has a display area and a non-display area; The display module includes: Display panel; A light-transmitting element is disposed on the light-emitting side of the display panel; An adhesive layer is located between the display panel and the light-transmitting element. The adhesive layer includes a transparent layer and a light-shielding layer. The transparent layer is located in the display area, and the light-shielding layer is located in the non-display area. The light-transmitting element located in the non-display area is provided with a microstructure portion, the microstructure portion including an adhesive coating, the microstructure portion being used to adhere the light-shielding layer.

2. The display module according to claim 1, characterized in that, The microstructure includes at least one groove formed on the surface of the light-transmitting element facing the display panel.

3. The display module according to claim 2, characterized in that, Along the stacking direction of the display panel and the light-transmitting element, the orthographic projection of the groove is annular; And / or, the depth of the groove is between 50 μm and 150 μm; And / or, the width of the groove is between 20μm and 100μm.

4. The display module according to claim 1, characterized in that, The microstructure includes a frosted surface; The roughness of the frosted surfaces is the same, or the roughness of the frosted surfaces gradually increases in the direction away from the display area.

5. A method for manufacturing a display module, characterized in that, Applied to the display module according to any one of claims 1-4; the manufacturing method includes: A light-transmitting element is provided, and a microstructure is provided in the non-display area of ​​the light-transmitting element; A first liquid optical adhesive is disposed in the non-display area of ​​the light-transmitting component to bond the first liquid optical adhesive through the microstructure portion, and a second liquid optical adhesive is disposed in the display area of ​​the light-transmitting component; wherein, the first liquid optical adhesive includes a light-shielding material; A display panel is provided, and the display panel is attached to the light-transmitting element.

6. The method for manufacturing a display module according to claim 5, characterized in that, The steps of applying a first liquid optical adhesive to the non-display area of ​​the light-transmitting element and applying a second liquid optical adhesive to the display area of ​​the light-transmitting element include: The first liquid optical adhesive is applied to the non-display area of ​​the light-transmitting component, and the first liquid optical adhesive is cured on the surface of the cover plate through a first curing process to form a dam. The second liquid optical adhesive is applied to the display area of ​​the light-transmitting component, and a gap is formed between the second liquid optical adhesive and the dam.

7. The method for preparing a display module according to claim 6, characterized in that, The step of applying the second liquid optical adhesive within the display area of ​​the cover plate and creating a gap between the second liquid optical adhesive and the dam includes: The viscosity of the second liquid optical adhesive is brought within a preset range through a second curing process, so that the second liquid optical adhesive flows under pressure. The step of bonding the display panel to the light-transmitting element includes: The display panel and the light-transmitting element are squeezed to cause the second liquid optical adhesive to flow and fill the gap under pressure.

8. The method for preparing a display module according to claim 6, characterized in that, The dam comprises at least two layers of the first liquid optical adhesive; The step of applying the first liquid optical adhesive to the non-display area of ​​the light-transmitting component and curing the first liquid optical adhesive on the surface of the light-transmitting component through a first curing process to form a dam includes: A layer of the first liquid optical adhesive is disposed in the non-display area of ​​the light-transmitting component, and the first liquid optical adhesive is cured by the first curing process to form a shielding layer. A layer of the first liquid optical adhesive is disposed on the shielding layer, and the first liquid optical adhesive is cured to form a shielding layer through the first curing process. The dam is formed by stacking two layers of the shielding layer, so that the side of the dam facing the display area has a preset angle.

9. The method for preparing a display module according to claim 8, characterized in that, Each of the aforementioned shielding layers includes at least two rings of the first liquid optical adhesive; The step of forming the dam by stacking two layers of the shielding layer includes: A ring of first liquid optical adhesive is disposed on the side of the non-display area of ​​the light-transmitting component that is close to or far from the display area, and the first liquid optical adhesive is cured by the first curing process. A ring of first liquid optical adhesive is disposed on the non-display area of ​​the light-transmitting component, either near the display area or away from the display area, and the first liquid optical adhesive is cured by the first curing process to form the shielding layer.

10. The method for manufacturing a display module according to any one of claims 5-9, characterized in that, Before the display panel and the light-transmitting element are bonded together; The thickness of the second liquid optical adhesive is equal to the thickness of the first liquid optical adhesive; or, the thickness of the second liquid optical adhesive is greater than the thickness of the first liquid optical adhesive, and the thickness difference between the second liquid optical adhesive and the first liquid optical adhesive is between 0.1 μm and 30 μm.

11. The method for preparing a display module according to any one of claims 7-9, characterized in that, The curing time for the first curing process is 10-20 seconds, and the irradiation power is 500 mw / cm². 2 ; And / or, the curing time of the second curing process is 5s-10s, and the irradiation power is 500 mw / cm². 2 ; And / or, the gap between the second liquid optical adhesive and the first liquid optical adhesive is between 0.1 μm and 50 μm; And / or, the thickness of the dam is between 6 μm and 9 μm.

12. The method for preparing a display module according to claim 5, characterized in that, The steps of applying a first liquid optical adhesive to the non-display area of ​​the light-transmitting element and applying a second liquid optical adhesive to the display area of ​​the light-transmitting element include: The second liquid optical adhesive is applied to the display area of ​​the light-transmitting component, and the second liquid optical adhesive is pre-cured through a second curing process; A support film is provided, which is disposed on the side of the second liquid optical adhesive away from the light-transmitting element, and a portion of the support film and the non-display area of ​​the light-transmitting element form a receiving groove; The first liquid optical adhesive is sprayed into the receiving tank and cured by the first curing process. Remove the support film and attach the display panel to the light-transmitting element.

13. A display device, characterized in that, The display module includes any one of claims 1 to 4.

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