Display module and packaging method thereof, and display device

Abstract

The present application relates to the technical field of display module, and particularly relates to a display module, a packaging method thereof and a display device, which solves the problem that the packaging of the OLED display module in the prior art is difficult to adapt to the narrow frame assembly structure. The display module provided by the present application comprises a display panel, a cover plate, a first blocking dam, a second blocking dam and a first packaging glue. The cover plate exceeds the display panel in both the first direction and the second direction. The first blocking dam is located on the non-display side of the display panel and is at least located at the edge position close to the second side surface. The orthographic projection of the second blocking dam on the cover plate at least partially exceeds the outer contour of the orthographic projection of the display panel on the cover plate. The first packaging glue is located between the second blocking dam and the cover plate. The first packaging glue is formed in the area surrounded by the second blocking dam and the cover plate and can have sufficient thickness, so as to improve the packaging effect of the first packaging glue on the display module and to adapt to the display device with the narrow frame assembly structure.

Description

Technical Field

[0001] This invention relates to the technical field of display modules, and more specifically to a display module, its packaging method, and a display device. Background Technology

[0002] With the gradual development of display technology, display devices with narrow bezels are increasingly popular among consumers. The bezel width of a display device depends on multiple dimensions. From an assembly perspective, the assembly method between the display module and the mid-frame also affects the bezel width. Currently, the packaging of display modules cannot well adapt to the assembly structure of narrow bezels, leading to potential defects in the display modules. Summary of the Invention

[0003] In view of this, embodiments of the present invention aim to provide a display module and its packaging method, and a display device.

[0004] In a first aspect, embodiments of the present invention provide a display module having opposing first and second sides along a first direction. The display module includes: a display panel; a cover plate located on the display side of the display panel, an organic adhesive layer disposed between the cover plate and the display panel, the cover plate covering the display panel in both the first and second directions, and the cover plate extending beyond the display panel in both the first and second directions; a first blocking dam located on the non-display side of the display panel, the first blocking dam being disposed along a third direction and at least located near the edge position of the second side; a second blocking dam located at least on the side of the first blocking dam facing outwards from the display module, and the orthographic projection of the second blocking dam onto the cover plate at least partially extending beyond the outer contour of the orthographic projection of the display panel onto the cover plate; and a first encapsulating adhesive located between the second blocking dam and the cover plate.

[0005] In one embodiment, on the side of the display module where the second barrier is set, the second barrier is enclosed by a cover plate, and the enclosed area covers the side of the display module where the second barrier is set.

[0006] In one embodiment, the display module further includes a second encapsulating adhesive located on the side of the first barrier dam facing the middle region of the display module.

[0007] In one embodiment, the display panel is a rigid panel, and the first blocking dam is also located at the edge of the first side.

[0008] In another embodiment, the display panel is a flexible display panel, which includes a display area, a bending area and a non-bending area. The bending area is located between the display area and the non-bending area, and the non-bending area is located on the non-display side of the display module. The bending area is located on the first side. The display module also includes a third encapsulating adhesive, which is located between the bending area and the cover plate.

[0009] In one embodiment, the material of either the first barrier dam or the second barrier dam is any one of epoxy acrylic, polyurethane acrylic, polyester acrylic, acrylic resin, silicone, or fluorinated adhesive; and / or, the viscosity of any one of the first barrier dam, the second barrier dam, and the first encapsulating adhesive is 500cp to 1500cp; and / or, the thixotropic index of any one of the first barrier dam, the second barrier dam, and the first encapsulating adhesive is 2 to 5.

[0010] In a second aspect, embodiments of the present invention provide a method for encapsulating a display module, comprising: providing a display module having opposing first and second sides along a first direction, the display module including a display panel and a cover plate, the cover plate being located on the display side of the display panel, an organic adhesive layer being between the cover plate and the display panel, the cover plate covering the display panel in both the first and second directions, and the display panel extending beyond the display panel in both the first and second directions; forming a first barrier dam, the first barrier dam being formed on the non-display side of the display panel, the first barrier dam being disposed along a third direction and at least formed at an edge position near the second side; forming a second barrier dam, the second barrier dam being formed at least on the side of the first barrier dam facing outwards from the display module, and the orthographic projection of the second barrier dam onto the cover plate at least partially extending beyond the outer contour of the orthographic projection of the display panel onto the cover plate; and forming a first encapsulating adhesive, the first encapsulating adhesive being formed between the second barrier dam and the cover plate.

[0011] In one embodiment, forming a second barrier dam further includes: on the side of the display module where the second barrier dam is formed, the formed second barrier dam surrounds the cover plate, and the area formed by the surround covers the side of the display module where the second barrier dam is formed; and / or, the encapsulation method further includes: forming a second encapsulating adhesive, the second encapsulating adhesive being formed on the side of the first barrier dam facing the middle area of ​​the display module.

[0012] In a third aspect, embodiments of the present invention provide a display device, comprising: the aforementioned display module; a middle frame having an accommodating groove, the display module being housed within the accommodating groove, the accommodating groove having opposing first and second sidewalls along a first direction, the second sidewall having at least two stepped surfaces, a cover plate overlapping the stepped surface away from the bottom of the accommodating groove, the side of the display panel overlapping the stepped surface near the bottom of the accommodating groove, and a first middle frame adhesive being disposed between the display panel and the stepped surface.

[0013] In one embodiment, the first sidewall is set as a plane, the display module is provided with a third encapsulating adhesive on the first side, the cover plate abuts against the first sidewall, and a second middle frame adhesive is provided between the third encapsulating adhesive and the first sidewall. Attached Figure Description

[0014] Figure 1A The image shown is a cross-sectional view of a display device.

[0015] Figure 1B The image shown is a cross-sectional view of another display device.

[0016] Figure 2A The figure shown is a plan view of a display module provided in at least one embodiment of the present invention.

[0017] Figure 2B The figure shown is a cross-sectional view of a display module provided by at least one embodiment of the present invention in the plane of the first direction and the third direction.

[0018] Figure 2C The figure shown is a cross-sectional view of a display module provided in at least one embodiment of the present invention in the planes of the second and third directions.

[0019] Figure 2D The figure shown is a plan view of the non-display side of a display module provided in at least one embodiment of the present invention.

[0020] Figure 3A The diagram shown is an unfolded schematic of a display panel in another display module provided by at least one embodiment of the present invention.

[0021] Figure 3B The figure shown is a cross-sectional view of another display module provided in at least one embodiment of the present invention.

[0022] Figure 4 The figure shown is a cross-sectional view of a display device provided in at least one embodiment of the present invention in a plane containing a first direction and a third direction.

[0023] Figure 5 The figure shown is a cross-sectional view of a display device provided in at least one embodiment of the present invention in the planes of the second and third directions.

[0024] Figure 6 The figure shown is a cross-sectional view of another display device provided in at least one embodiment of the present invention.

[0025] Figures 7A to 7E As shown Figure 3B The image shown is a cross-sectional view of the module during its fabrication process. Detailed Implementation

[0026] Preferred embodiments of the present disclosure will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present disclosure and are not intended to limit the scope of protection of the present disclosure.

[0027] It should be noted that in the description of this disclosure, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0029] Figure 1A The image shown is a cross-sectional view of a display device.

[0030] A display device includes a display module 10 and a middle frame 20. The display module 10 includes a cover plate 1 and a display panel 2. The cover plate 1 is located on the display side of the display panel 2, and the cover plate 1 extends beyond the display panel 2 in both the first direction X and the second direction Y to form an eaves structure 11.

[0031] A receiving groove 201 is provided in the middle area of ​​the middle frame 20. The receiving groove 201 has a first sidewall 202 and a second sidewall 203 along the first direction X. The first sidewall 202 and the second sidewall 203 each include at least one stepped surface. The display module 10 is placed in the receiving groove 201, and the cover plate 1 extends beyond the roof structure 11 of the display panel 2 in the first direction X and overlaps with a stepped surface on the first sidewall 202 and the second sidewall 203 respectively, so that the side of the cover plate 1 away from the display panel 2 is flush with the surface of the middle frame 20.

[0032] A frame adhesive 40 is provided between the cover plate 1 and the stepped surface to bond and seal the cover plate 1 and the frame 20. During use, corrosive substances such as moisture, sweat, and grease may enter the gap between the cover plate 1 and the frame 20. Since the display panel 2 is completely located within the area enclosed by the frame adhesive 40, the frame adhesive 40 can help to encapsulate the display module 10, reducing the possibility of corrosive substances entering from the gap between the cover plate 1 and the outer shell corroding the display module 10.

[0033] In this type of display device, the stepped surface needs to have sufficient width to apply the frame adhesive 40 to ensure the connection strength between the cover plate 1 and the frame 20. The width of the cover plate 1 extending beyond the eaves structure 11 of the display panel 2 needs to be greater than the width of the stepped surface to ensure that the display panel 2 does not interfere with the frame 20 and affect installation. The area of ​​the cover plate 1 extending beyond the eaves structure 11 of the display panel 2 and the area of ​​the frame 20 located around the cover plate 1 together constitute the bezel of the display module 10. Since it is difficult to reduce the size of the cover plate 1 extending beyond the eaves structure 11 of the display panel 2, the bezel size will be relatively large, which is not conducive to forming a narrow bezel.

[0034] Figure 1B The image shown is a cross-sectional view of another display device.

[0035] Another display device includes a display module 10 and a middle frame 20. The display module 10 includes a cover plate 1 and a display panel 2. The cover plate 1 is located on the display side of the display panel 2, and the cover plate 1 extends beyond the display panel 2 in both the first direction X and the second direction Y to form an eaves structure 11.

[0036] A receiving groove 201 is provided in the middle area of ​​the middle frame 20. The receiving groove 201 has opposing first sidewalls 202 and second sidewalls 203 along the first direction X. The second sidewall 203 has at least two stepped surfaces. The display module 10 is placed in the receiving groove 201. The cover plate 1 extends beyond the roof structure 11 of the display panel 2 and overlaps the stepped surface away from the bottom of the receiving groove 201, so that the side of the cover plate 1 away from the display panel 2 is flush with the surface of the middle frame 20. The side of the display panel 2 overlaps the stepped surface near the bottom of the receiving groove 201. The first sidewall 202 is set as a plane, specifically perpendicular to the bottom of the receiving groove 201.

[0037] It should be noted that the stepped surface where the receiving groove 201 overlaps with the cover plate 1 is relatively narrow, thereby reducing the size of the cover plate 1 extending beyond the eaves structure 11 of the display panel 2, thus achieving the purpose of reducing the bezel of the display device. However, precisely because the stepped surface where the receiving groove 201 overlaps with the cover plate 1 is relatively narrow, it is difficult to apply sufficient frame adhesive 40 to this stepped surface to ensure the bonding strength between the frame 20 and the cover plate 1. Furthermore, there is no stepped surface at the first side wall 202, and when the cover plate 1 adheres to the first side wall 202, it is also difficult to form sufficient frame adhesive 40 between the first side wall 202 and the cover plate 1 to ensure the bonding strength between the frame 20 and the cover plate 1. Therefore, frame adhesive 40 needs to be applied between the display panel 2 and the stepped surface near the bottom of the receiving groove 201, and also between the portion of the display panel 2 near the first side wall 202 and the bottom of the receiving groove 201, to achieve bonding between the display module 10 and the frame 20. At this time, the side of the display device is completely outside the area enclosed by the frame adhesive 40.

[0038] During use, corrosive substances such as moisture, sweat, and grease can enter the gap between the cover plate 1 and the middle frame 20. These corrosive substances can easily come into direct contact with the sides of the display module 10. For LCD (Liquid Crystal Display) display modules 10, the display module 10 has sufficient thickness, making it easy to form a sufficiently thick encapsulating adhesive on each side of the display module 10, reducing the possibility of corrosive substances invading the display module 10 and ensuring the encapsulation effect of the LCD display module. However, for OLED (Organic Light-Emitting Diode) display modules, the display module 10 is thinner. Due to the fluidity of the encapsulating adhesive, it is difficult to form a sufficiently thick encapsulating adhesive on the thinner sides. Corrosive substances in contact with the sides of the display module 10 can easily infiltrate the display module 10, leading to defects in the display module 10.

[0039] Based on this, an embodiment of the present invention provides a display module having opposing first and second sides along a first direction. The display module includes: a display panel; a cover plate located on the display side of the display panel, with an organic adhesive layer disposed between the cover plate and the display panel, the cover plate covering the display panel in both the first and second directions, and the cover plate extending beyond the display panel in both the first and second directions; a first blocking dam located on the non-display side of the display panel, disposed along a third direction and at least located near the edge position of the second side; a second blocking dam located at least on the side of the first blocking dam facing outwards from the display module, and the orthographic projection of the second blocking dam onto the cover plate at least partially extending beyond the outer contour of the orthographic projection of the display panel onto the cover plate; and a first encapsulating adhesive located between the second blocking dam and the cover plate.

[0040] The following describes some specific embodiments of the display module of this disclosure.

[0041] Figure 2A The figure shown is a plan view of a display module provided in at least one embodiment of the present invention. Figure 2B The figure shown is a cross-sectional view of a display module provided by at least one embodiment of the present invention in the plane of the first direction and the third direction. Figure 2C The figure shown is a cross-sectional view of a display module provided in at least one embodiment of the present invention in the planes of the second and third directions. Figure 2D The figure shown is a plan view of the non-display side of a display module provided in at least one embodiment of the present invention.

[0042] like Figure 2BAs shown, the display module 10 includes a cover plate 1 and a display panel 2. The cover plate 1 is located on the display side of the display panel 2, and an organic adhesive layer 13 is provided between the cover plate 1 and the display panel 2 to bond them together. The cover plate 1 covers the display panel 2 in both the first direction X and the second direction Y, and extends beyond the display panel 2 in both directions X and Y, forming an eaves structure 11. The first direction X and the second direction Y are perpendicular to each other and parallel to the cover plate 1.

[0043] like Figure 2A As shown, the display panel 2 includes a display area AA and a non-display area NA, with the non-display area NA surrounding the display area AA. A light-shielding layer 12 is provided on the side of the cover plate 1 facing the display panel 2. The light-shielding layer 12 is located in the outer periphery of the cover plate 1, and its orthographic projection on the display panel 2 covers the non-display area NA while exposing the display area AA. The light-shielding layer 12 can cover the components of the display module 10 located within the non-display area NA, and also prevent light from escaping from the non-display area NA.

[0044] For example, such as Figure 2B As shown, a polarizer 4 is located between the organic adhesive layer 13 and the display panel 2. When ambient light shines on the display panel 2, only ambient light with the same polarization direction as the polarizer 4 can enter the display panel 2; the rest of the ambient light is absorbed by the polarizer. The ambient light entering the display panel 2 is reflected by internal components (such as the cathode layer) and then shines on the polarizer 4. The polarization direction of the ambient light after reflection by the internal components of the display panel 2 changes. Therefore, most of the ambient light shining from inside the display panel 2 onto the polarizer 4 is blocked and absorbed by the polarizer 4. Only a small portion of the ambient light can pass through the polarizer 4 and be emitted from inside the display panel 2 to the outside. This reduces the reflection effect of ambient light, reduces the impact of ambient light on the display effect of the display panel 2, and improves the visibility of the display module 10.

[0045] like Figure 2A As shown, the display module 10 has a first side 101 and a second side 102 opposite each other along the first direction X, and a third side 103 and a fourth side 104 opposite each other along the second direction Y.

[0046] In some examples, display panel 2 is a rigid panel, such as a glass-based display panel or a quartz-based display panel. For example... Figure 2BAs shown, a shielding protective film 5 (BPF) and a screen cooling film 6 (SCF) are sequentially disposed on the non-display side of the display panel 2. The shielding protective film 5 is used for electromagnetic shielding of the display panel 2 to improve its maximum withstand voltage; the screen cooling film 6 is used to improve the heat dissipation effect of the display panel 2, thereby enhancing its reliability. For example, the shielding protective film 5 is made of metal or ferrite, etc. For example, the screen cooling film 6 is made of graphite or metal, etc.

[0047] A first blocking dam 31 is provided on the non-display side of the display panel 2. The first blocking dam 31 is disposed along the third direction Z (i.e., the thickness direction of the display panel 2) and is located at least near the edge of the second side surface 102. In a specific example of the present invention, such as Figure 2B and Figure 2C As shown, the first blocking dam 31 is located on the side of the screen heat dissipation film 6 away from the display panel 2. The first blocking dam 31 is located near the edge of the first side 101, the second side 102, the third side 103, and the fourth side 104, and is arranged in a ring on the non-display side of the display panel 2 (e.g., Figure 2D (As shown).

[0048] For example, the first barrier dam 31 is made of Dam adhesive, which can be any of epoxy acrylic, polyurethane acrylic, polyester acrylic, acrylic resin, silicone, fluorinated adhesives, etc., and has functions such as grease resistance, acid and alkali resistance, water resistance, and antistatic properties. Dam adhesive has a high thixotropic index, which is an indicator of the viscosity change of a colloid under agitation and stillness. It describes the characteristic that the viscosity of the adhesive decreases when agitated and immediately increases after agitation stops. Colloids with a high thixotropic index become more fluid when agitated, making them easier to coat and apply, while quickly recovering high viscosity after agitation stops, preventing dripping and ensuring the stability of the application site. For example, the viscosity of the first barrier dam 31 is 500cp to 1500cp (cp is lipoise, 1cp = 1 mPa·s), and the thixotropic index is 2 to 5, to ensure that the adhesive is more easily stacked to form a first barrier dam 31 with a certain height.

[0049] A second barrier 32 is provided on the side of the first barrier 31 facing the outside of the display module 10. The orthographic projection of the second barrier 32 on the cover plate 1 at least partially exceeds the outer contour of the orthographic projection of the display panel 2 on the cover plate 1. That is, the top of the second barrier 32 extends beyond the display panel 2, forming a groove for storing adhesive between the second barrier 32 and the cover plate 1. Of course, the orthographic projection of the second barrier 32 on the cover plate 1 cannot exceed the cover plate 1, otherwise it will affect the assembly of the display module 10. For example, the material of the second barrier 32 can be the same as that of the first barrier 31.

[0050] For example, on the side of the display module 10 where the second blocking dam 32 is provided (specifically the first side 101, the second side 102, the third side 103, and the fourth side 104), the second blocking dam 32 is not only provided on the side of the first blocking dam 31 facing the outside of the display module 10, but also at the edge of the side of the display module 10 with the second blocking dam 32, so that the second blocking dam 32 and the cover plate 1 enclose each other, and the area formed by the enclosed area covers the side of the display module 10 where the second blocking dam 32 is provided, so as to fill the space between the second blocking dam 32 and the cover plate 1 with glue to form the first encapsulating glue 33.

[0051] The space between the second barrier 32 and the cover plate 1 is filled with a first encapsulating adhesive 33. During its formation, the first encapsulating adhesive 33 is blocked by the second barrier 32 and the cover plate 1, thus achieving sufficient thickness to improve the encapsulation effect of the first encapsulating adhesive 33 on the display module 10. With sufficient side encapsulation of the display module 10, the display module 10 can adapt to display devices with narrow bezel assembly structures and ensure the service life of the display module 10.

[0052] The gap between the second barrier dam 32 and the cover plate 1 is small. Due to the adhesiveness of the first encapsulant 33 itself, the first encapsulant 33 located between the second barrier dam 32 and the cover plate 1 can have a relatively uniform thickness. Of course, after the second barrier dam 32 and the cover plate 1 enclose a closed area, the first encapsulant 33 will remain completely within the enclosed area, which helps to improve the uniformity of the thickness of the first encapsulant 33.

[0053] In addition, since the orthographic projection of the second blocking dam 32 onto the cover plate 1 cannot exceed the cover plate 1, the thickness of the first encapsulating adhesive 33 depends on the distance by which the top of the second blocking dam 32 extends beyond the display panel 2. The thickness of the first encapsulating adhesive 33 can be adjusted by adjusting the distance by which the top of the second blocking dam 32 extends beyond the display panel 2.

[0054] For example, the first encapsulant 33 can be a filler or a dam adhesive. When the first encapsulant 33 is a filler, its material can be epoxy resin. When the first encapsulant 33 is a dam adhesive, its material can be the same as that of the first barrier dam 31.

[0055] For example, the first barrier dam 31 has a second encapsulating adhesive 34 on the side facing the middle region of the display module 10. The second encapsulating adhesive 34 mainly covers the edge region of the non-display side of the display module 10, thereby further enhancing the encapsulation effect of the display module 10. For example, the material of the second encapsulating adhesive 34 is the same as that of the first encapsulating adhesive 33.

[0056] Figure 3A The diagram shown is an unfolded schematic of a display panel in another display module provided by at least one embodiment of the present invention. Figure 3B The figure shown is a cross-sectional view of another display module provided in at least one embodiment of the present invention.

[0057] In other examples, display panel 2 is a flexible panel, such as a polyimide (PI) based flexible panel. Figure 3A As shown, the non-display area NA includes the bonding area BA, and the bonding area BA includes the bent area 25 and the non-bent area 26. The bent area 25 is located between the non-bent area 26 and the display area AA. Figure 3B As shown, the display panel 2 bends towards the non-display side of the display module 10 at the bending area 25, causing the non-bending area 26 to bend to the non-display side of the display module 10. Since most of the bonding area BA is hidden to the non-display side of the display module 10 after bending, the display area AA of the display panel 2 occupies a larger proportion on the display side of the display module 10, resulting in a better display effect for the display module 10.

[0058] Wherein, after the display panel 2 is bent toward the non-display side of the display module 10 at the bending area 25, the first side 101 of the display module 10 along the first direction X is the bending area 25 in the display panel 2. It should be noted that the display panel 2 covered by the cover plate 1 in the first direction X is the bent display panel 2. Before the display panel 2 is bent, the cover plate 1 generally does not extend beyond the display panel 2 in the first direction X, otherwise it would greatly increase the size of the non-display area NA of the display module 10 in the first direction X.

[0059] The non-display side of the display panel 2 is provided with a shielding protective film 5 (BPF), a screen cooling film 6 (SCF), and a support plate 7 in sequence.

[0060] The shielding protective film 5 is used to electromagnetically shield the display panel 2 to improve its maximum withstand voltage. Simultaneously, the shielding protective film 5 also supports and protects the display panel 2 to ensure it is not damaged during manufacturing. For example, the shielding protective film 5 includes a first protective film and a second protective film. The first protective film is located on the non-display side of the display panel 2 within the display area AA, and the second protective film is located on the non-display side of the display panel 2 within the non-bending area 26. The non-display side of the display panel 2 within the bending area 25 does not have the shielding protective film 5, thereby improving the bending capability of the display panel 2 within the bending area 25 and reducing the bending radius of the bending area 25. For example, the shielding protective film 5 is made of metal or ferrite.

[0061] For example, during the formation of the shielding protective film 5, a material layer of the shielding protective film 5 is formed on the entire non-display side of the display panel 2, and then the shielding protective film 5 located in the bending area 25 is removed to form a first shielding protective film 51 and a second shielding protective film 52. Alternatively, the first shielding protective film 51 and the second shielding protective film 52 are formed first, and then the first shielding protective film 51 is adhered to the area of ​​the display panel 2 corresponding to the display area AA, and the second shielding protective film 52 is adhered to the area of ​​the display panel 2 corresponding to the non-bending area 26.

[0062] For example, a heat dissipation film 6 covers the display panel 2 located within the display area AA to improve the heat dissipation effect and reliability of the display panel 2. The heat dissipation film 6 may be made of materials such as metal or graphite.

[0063] For example, the support plate 7 is located at the edge of the screen heat dissipation film 6. After the bending area 25 of the display panel 2 is bent towards the non-display side of the display device, the non-bending area 26 is attached to the side of the support plate 7 away from the screen heat dissipation film 6. On the one hand, the support plate 7 can play a certain role in raising the bending area 25 to increase the bending radius of the bending area 25 and prevent the bending area 25 from breaking due to its small bending radius. On the other hand, the support plate 7 can support the display area AA and the bending area 25 of the display panel 2, thereby increasing the stability of the display module 10.

[0064] A first barrier dam 31 is provided on the non-display side of the display panel 2. The first barrier dam 31 is positioned along the third direction Z (i.e., the thickness direction of the display panel 2) and is located near the edge of the second side 102. For example, the material of the first barrier dam 31 is dam adhesive, which can be any one of epoxy acrylic, polyurethane acrylic, polyester acrylic, acrylic resin, silicone, fluorinated adhesive, etc. For example, the viscosity of the first barrier dam 31 is 500cp to 1500cp (cp is lipoise, 1cp = 1 mPa·s), and the thixotropic index is 2 to 5, to ensure that the adhesive can be more easily stacked to form a first barrier dam 31 with a certain height.

[0065] A second barrier 32 is provided on the side of the first barrier 31 facing the outside of the display module 10. The orthographic projection of the second barrier 32 on the cover plate 1 at least partially exceeds the outer contour of the orthographic projection of the display panel 2 on the cover plate 1. That is, the top of the second barrier 32 extends beyond the display panel 2, forming a groove for storing adhesive between the second barrier 32 and the cover plate 1. Of course, the orthographic projection of the second barrier 32 on the cover plate 1 cannot exceed the cover plate 1, otherwise it will affect the assembly of the display module 10. For example, the material of the second barrier 32 can be the same as that of the first barrier 31.

[0066] For example, on the second side 102 of the display module 10, the second blocking dam 32 is not only provided on the side of the first blocking dam 31 facing the outside of the display module 10, but also provided at the edge of the second side 102, so that the second blocking dam 32 and the cover plate 1 enclose the area formed by the enclosed area, and the area covered by the enclosed area covers the second side 102.

[0067] A first encapsulating adhesive 33 is filled between the second barrier 32 and the cover plate 1. During its formation, the first encapsulating adhesive 33 effectively blocks the second barrier 32 and the cover plate 1, thus possessing sufficient thickness to improve the encapsulation effect on the display module. Furthermore, since the orthogonal projection of the second barrier 32 onto the cover plate 1 cannot exceed the cover plate 1, the thickness of the first encapsulating adhesive 33 depends on the distance by which the top of the second barrier 32 extends beyond the display panel 2. Adjusting this distance allows for the adjustment of the thickness of the first encapsulating adhesive 33.

[0068] In the structure of a flexible panel, the display panel 2 is bent, and correspondingly, the third and fourth sides are also bent. Before the display panel 2 is bent, the cover plate 1 cannot completely cover the display panel 2 in the first direction X. Therefore, it is difficult to form a sufficiently thick encapsulating adhesive on the third and fourth sides using the cover plate 1 and the second blocking dam 32 before the display panel 2 is bent. Therefore, in flexible panels, more consideration is given to how to reduce the size of the non-display area NA of the display module 10 in the first direction X. For example, encapsulating adhesive is provided on the third and fourth sides of the display module 10. The encapsulating adhesive is encapsulated using a conventional coating method, such as directly using dispensing to form a dam adhesive covering the third and fourth sides.

[0069] For example, before bending the display panel 2, the cover plate 1 is positioned beyond the display panel 2 in the first direction X. The cover plate 1 is only bonded to the display panel 2 with organic adhesive in the display area AA, and no organic adhesive is applied between the cover plate 1 and the display panel 2 in the non-display area NA. At this time, the display panel 2 is in an unfolded state. By setting a first blocking dam 31 and a second blocking dam 32, a first encapsulating adhesive 33 of appropriate thickness is formed on each side of the display panel 2 to encapsulate each side of the display panel 2, giving the display panel 2 a good encapsulation effect. Afterwards, the cover plate 1 is cut and the display panel 2 is bent.

[0070] After the display panel 2 is bent, the bent area 25 of the display panel 2 serves as the first side 101 of the display module 10. For example, a third encapsulating adhesive 35 is filled between the bent area 25 and the cover plate 1. In addition, the third encapsulating adhesive 35 is also coated on the bent area 25. Due to the adhesiveness of the third encapsulating adhesive 35, the third encapsulating adhesive 35 coated on the bent area 25 can cover most of the bent area 25, thereby better encapsulating the display module 10.

[0071] For example, the colors of the first barrier 31, the second barrier 32, the first encapsulating adhesive 33, the second encapsulating adhesive 34, and the third encapsulating adhesive 35 can be black or other colors, as long as they can achieve the light-blocking effect.

[0072] At least one embodiment of the present invention also provides a display device, which includes the display module and the mid-frame described above. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, or vehicle display screen; the embodiments disclosed herein do not limit this to such devices.

[0073] Figure 4 The figure shown is a cross-sectional view of a display device provided in at least one embodiment of the present invention in a plane containing a first direction and a third direction. Figure 5 The figure shown is a cross-sectional view of a display device provided in at least one embodiment of the present invention in the planes of the second and third directions.

[0074] like Figure 4 and Figure 5 As shown, a receiving groove 201 is formed in the middle area of ​​the middle frame 20, and the display module 10 is installed in the receiving groove 201. The receiving groove 201 has a first sidewall 202 and a second sidewall 203 opposite to each other in the first direction X.

[0075] The second sidewall 203 has at least two stepped surfaces. The cover plate 1 extends beyond the eaves structure 11 of the display panel 2 and overlaps with the stepped surface away from the bottom of the receiving groove 201, so that the side of the cover plate 1 away from the display panel 2 is flush with the surface of the middle frame 20. The side of the display panel 2 overlaps with the stepped surface near the bottom of the receiving groove 201. No middle frame adhesive is provided between the cover plate 1 and the stepped surface, and a first middle frame adhesive 204 is provided between the display panel 2 and the stepped surface.

[0076] It should be noted that since no middle frame adhesive is provided between the cover plate 1 and the stepped surface, the stepped surface overlapping the cover plate 1 can be made narrower. Correspondingly, the dimension of the cover plate 1 extending beyond the eaves structure 11 of the display panel 2 can also be reduced. The area of ​​the cover plate 1 extending beyond the eaves structure 11 of the display panel 2 and the area of ​​the middle frame 20 located around the cover plate 1 constitute the frame of the display module 10. With the reduced dimension of the cover plate 1 extending beyond the eaves structure 11 of the display panel 2, the frame size of the display device will also be reduced. Simultaneously, because the sides of the display module 10 have a good sealing effect, the service life of the display module 10 can also be guaranteed.

[0077] For example, such as Figure 4 and Figure 5 As shown, the display panel 2 in the display device is a rigid panel, and the receiving groove 201 has a third sidewall 206 and a fourth sidewall 207 opposite each other in the second direction Y. The assembly structure of the third sidewall 206 and the fourth sidewall 207 with the display module 10 is exactly the same as the assembly structure of the second sidewall 203 with the display module 10.

[0078] Figure 6 The figure shown is a cross-sectional view of another display device provided in at least one embodiment of the present invention.

[0079] For example, such as Figure 6 As shown, the first sidewall 202 is set as a plane, and the cover plate 1 abuts against the first sidewall 202. A third encapsulating adhesive 35 is provided on the first sidewall 101 of the display module 10, and a second mid-frame adhesive 205 is provided between the third encapsulating adhesive 35 and the first sidewall 202. By using the bonding of the second mid-frame adhesive 205 and the third encapsulating adhesive 35, a good encapsulation effect can be formed between the display module 10 and the first sidewall 202.

[0080] At least one embodiment of the present invention also provides a method for encapsulating a display module, comprising: providing a display module having opposing first and second sides along a first direction, and opposing third and fourth sides along a second direction; the display module including a display panel and a cover plate, the cover plate being located on the display side of the display panel; an organic adhesive layer being between the cover plate and the display panel; the cover plate covering the display panel in both the first and second directions, and the display panel extending beyond the display panel in both the first and second directions; forming a first barrier dam, the first barrier dam being formed on the non-display side of the display panel, and at least at an edge position near the second side; forming a second barrier dam, the second barrier dam being formed at least on the side of the first barrier dam facing outwards from the display module, and the orthographic projection of the second barrier dam onto the cover plate at least partially extending beyond the outer contour of the orthographic projection of the display panel onto the cover plate; and forming a first encapsulating adhesive, the first encapsulating adhesive being formed between the second barrier dam and the cover plate.

[0081] Below, to form Figure 3Aand Figure 3B Taking the display module shown as an example, the packaging method of the display module provided in this disclosure embodiment will be introduced.

[0082] Figures 7A to 7E As shown Figure 3B The image shown is a cross-sectional view of the module during its fabrication process.

[0083] First, provide display module 10. For example... Figure 7A As shown, the display module 10 includes a cover plate 1 and a display panel 2, the display panel 2 being a flexible panel.

[0084] like Figure 3A As shown, display panel 2 includes a display area AA and a non-display area NA, with the non-display area NA surrounding the display area AA. The non-display area NA includes a bonding area BA, which includes a bent area 25 and a non-bent area 26. The bent area 25 is located between the non-bent area 26 and the display area AA. Figure 7A As shown, the display panel 2 bends towards the non-display side of the display module 10 at the bending area 25, causing the non-bending area 26 to bend to the non-display side of the display module 10. Since most of the bonding area BA is hidden to the non-display side of the display module 10 after bending, the display area AA of the display panel 2 occupies a larger proportion on the display side of the display module 10, resulting in a better display effect for the display module 10.

[0085] The cover plate 1 is located on the display side of the display panel 2. An organic adhesive layer 13 is provided between the cover plate 1 and the display panel 2 to bond the cover plate 1 and the display panel 2. The cover plate 1 covers the display panel 2 in both the first direction X and the second direction Y, and the cover plate 1 extends beyond the display panel 2 in both the first direction X and the second direction Y to form an eaves structure 11.

[0086] A shielding protective film 5, a screen heat dissipation film 6, and a support plate 7 are sequentially arranged on the non-display side of the display panel 2. The shielding protective film 5 includes a first protective film and a second protective film. The first protective film is located on the non-display side of the display panel 2 within the display area AA, and the second protective film is located on the non-display side of the display panel 2 within the non-bending area 26. The screen heat dissipation film 6 covers the display panel 2 within the display area AA to improve the heat dissipation effect and reliability of the display panel 2. The support plate 7 is located at the edge of the screen heat dissipation film 6. After the bending area 25 of the display panel 2 is bent towards the non-display side of the display device, the non-bending area 26 is attached to the side of the support plate 7 away from the screen heat dissipation film 6.

[0087] The display module 10 has a first side 101 and a second side 102 opposite to each other along the first direction X.

[0088] This forms the first barrier dam 31. (As...) Figure 7AAs shown, the first barrier dam 31 is formed on the non-display side of the display panel 2, and is formed at least near the edge of the second side 102. For example, the first barrier dam 31 is formed on the side of the screen heat dissipation film 6 away from the cover plate 1.

[0089] For example, before forming the first barrier dam 31, the non-display side of the display panel 2 is oriented upwards so that the first barrier dam 31 can be formed from above on the non-display side of the display panel 2 by dispensing adhesive.

[0090] This forms a second barrier dam 32. Figure 7B As shown, the second blocking dam 32 is formed at least on the side of the first blocking dam 31 facing the outside of the display module 10, and the orthographic projection of the second blocking dam 32 on the cover plate 1 at least partially exceeds the outer contour of the orthographic projection of the display panel 2 on the cover plate 1, so that a groove for storing adhesive can be formed between the second blocking dam 32 and the cover plate 1.

[0091] It should be noted that the main function of the first blocking dam 31 is to form the second blocking dam 32. Considering that the display module 10 is relatively thin and the adhesive adhesion point is very narrow, it is difficult to directly form a blocking dam of a certain height at the edge of the first side 101 of the display module 10. Therefore, the first blocking dam 31 is first formed on the non-display side of the display panel 2 to provide an adhesion point of sufficient size, and then the second blocking dam 32 is formed on the side of the first blocking dam 31 facing the outside of the display module 10, to ensure that the second blocking dam 32 can be formed smoothly.

[0092] For example, on the side of the display module 10 that forms the second barrier 32 (specifically on the first side 101), the formed second barrier 32 encloses the cover plate 1, and the enclosed area covers the side of the display module 10 that forms the second barrier 32.

[0093] For example, before forming the second barrier 32, the position of the display module 10 is changed so that the first side 101 faces upward, so that the second barrier 32 can be formed by dispensing adhesive.

[0094] Forming the first encapsulating adhesive 33. (Example) Figure 7C As shown, the first encapsulating adhesive 33 is formed between the second barrier dam 32 and the cover plate 1. The gap between the second barrier dam 32 and the cover plate 1 is small, and due to the adhesive properties of the first encapsulating adhesive 33 itself, the first encapsulating adhesive 33 located between the second barrier dam 32 and the cover plate 1 can have a relatively uniform thickness. Of course, after the second barrier dam 32 and the cover plate 1 enclose a closed area, the first encapsulating adhesive 33 will remain completely within the enclosed area, which helps to improve the uniformity of the thickness of the first encapsulating adhesive 33.

[0095] In addition, by adjusting the distance of the top of the second blocking dam 32 beyond the display panel 2, the thickness of the first encapsulating adhesive 33 can be adjusted, so that the thickness of the first encapsulating adhesive 33 is not too thin and thus affects the encapsulation effect, nor is the thickness of the first encapsulating adhesive 33 too thick and thus affects the assembly of the display module 10 and the middle frame 20.

[0096] For example, the first encapsulant 33 is formed with the first side 101 facing upwards to ensure that the first encapsulant 33 can be restricted by the second barrier dam 32 and the cover plate 1.

[0097] Forming the second encapsulating adhesive 34. (Example) Figure 7D As shown, the second encapsulating adhesive 34 is formed on the side of the first barrier dam 31 facing the middle region of the display module 10.

[0098] For example, before forming the second encapsulant 34, the position of the display module 10 is changed so that the non-display side of the display panel 2 faces upward, so as to facilitate the formation of the second encapsulant 34.

[0099] Forming the third encapsulating adhesive 35. (Example) Figure 7E As shown, a third encapsulating adhesive 35 is formed between the bending area 25 and the cover plate 1 to protect the area between the bending area 25 and the cover plate 1.

[0100] For example, a third encapsulating adhesive 35 is also coated on the bending area 25. Due to the adhesiveness of the third encapsulating adhesive 35, the third encapsulating adhesive 35 coated on the bending area 25 can cover most of the bending area 25, thereby better encapsulating the display module 10.

[0101] For example, before forming the third encapsulant 35, the position of the display module 10 is changed so that the bending area 25 faces upward, so as to facilitate the formation of the third encapsulant 35.

[0102] The following points also need to be explained:

[0103] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0104] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0105] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0106] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display module, characterized in that, The display module includes a first side and a second side opposite to each other along a first direction. Display panel; A cover plate is located on the display side of the display panel. An organic adhesive layer is disposed between the cover plate and the display panel. The cover plate covers the display panel in both the first and second directions and extends beyond the display panel in both the first and second directions. A first blocking dam is located on the non-display side of the display panel, and the first blocking dam is disposed along a third direction and is located at least near the edge of the second side. The second blocking dam is located at least on the side of the first blocking dam facing the outside of the display module, and the orthographic projection of the second blocking dam on the cover plate at least partially exceeds the outer contour of the orthographic projection of the display panel on the cover plate; The first encapsulating adhesive is located between the second barrier dam and the cover plate.

2. The display module according to claim 1, characterized in that, On the side of the display module where the second barrier is located, the second barrier and the cover plate enclose each other, and the enclosed area covers the side of the display module where the second barrier is located.

3. The display module according to claim 1, characterized in that, The display module also includes: The second encapsulating adhesive is located on the side of the first barrier dam facing the middle area of ​​the display module.

4. The display module according to claim 1, characterized in that, The display panel is a rigid panel, and the first barrier is located at the edge of the first side.

5. The display module according to claim 1, characterized in that, The display panel is a flexible display panel, which includes a display area, a bending area and a non-bending area. The bending area is located between the display area and the non-bending area. The non-bending area is located on the non-display side of the display module, and the bending area is located on the first side. The display module also includes a third encapsulating adhesive, which is located between the bending area and the cover plate.

6. The display module according to claim 1, characterized in that, The material of either the first or the second barrier dam is any one of epoxy acrylic, polyurethane acrylic, polyester acrylic, acrylic resin, silicone, or fluorinated adhesive; and / or, The viscosity of any one of the first barrier dam, the second barrier dam, and the first encapsulating adhesive is 500 cp to 1500 cp; and / or, The thixotropic index of any one of the first barrier dam, the second barrier dam, and the first encapsulating adhesive is 2 to 5.

7. A method for packaging a display module, characterized in that, include: A display module is provided, the display module having opposing first and second sides along a first direction, the display module including a display panel and a cover plate, the cover plate being located on the display side of the display panel, an organic adhesive layer being between the cover plate and the display panel, the cover plate covering the display panel in both the first and second directions, and the display panel extending beyond the display panel in both the first and second directions; A first barrier dam is formed on the non-display side of the display panel. The first barrier dam is disposed along a third direction and is formed at least at the edge position near the second side. A second blocking dam is formed, which is at least formed on the side of the first blocking dam facing the outside of the display module, and the orthographic projection of the second blocking dam on the cover plate at least partially exceeds the outer contour of the orthographic projection of the display panel on the cover plate; A first encapsulating adhesive is formed between the second barrier dam and the cover plate.

8. The packaging method for a display module according to claim 7, characterized in that, The formation of the second barrier further includes: on the side of the display module where the second barrier is formed, the formed second barrier surrounds the cover plate, and the area formed by the enclosure covers the side of the display module where the second barrier is formed; and / or, The encapsulation method further includes: forming a second encapsulating adhesive, the second encapsulating adhesive being formed on the side of the first barrier dam facing the middle region of the display module.

9. A display device, characterized in that, include: The display module as described in any one of claims 1 to 6; The middle frame has an opening for a receiving groove, and the display module is housed in the receiving groove. The receiving groove has a first sidewall and a second sidewall opposite to each other along a first direction. The second sidewall has at least two stepped surfaces. The cover plate overlaps on the stepped surface away from the bottom of the receiving groove. The side of the display panel overlaps on the stepped surface near the bottom of the receiving groove. A first middle frame adhesive is provided between the display panel and the stepped surface.

10. The display device according to claim 9, characterized in that, The first sidewall is set as a plane, the display module is provided with a third encapsulating adhesive on the first sidewall, the cover plate abuts against the first sidewall, and a second middle frame adhesive is provided between the third encapsulating adhesive and the first sidewall.

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