A display module, its manufacturing method, and a display device.

Abstract

This invention discloses a display module and its manufacturing method, as well as a display device, relating to the field of display technology. The display module includes: a display substrate; a cover plate assembly located on the light-emitting surface side of the display substrate; the cover plate assembly includes a central region and at least a partially surrounding edge region; the orthographic projection of the display substrate onto the cover plate assembly is located in the central region; the cover plate assembly includes a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure is located in the edge region; and a sealant located on the side of the cover plate body closer to the display substrate; the sealant is at least partially disposed around the central region, and the sealant is located on the side of the at least partially blocking structure away from the central region. The technical solution of this invention can prevent the sealant from seeping into the gap between the display substrate and the cover plate assembly, improving the display effect and lifespan of the display module.

Description

Technical Field

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

[0002] With the development of display technology, electronic products with display functions are gradually becoming thinner and lighter with narrower bezels. During the assembly process, sealant is usually applied to the periphery of the cover plate to securely connect it to the frame.

[0003] Because the sealant on the cover plate has a certain degree of fluidity before curing, it is easy for the sealant to seep into the gap between the display substrate and the cover plate along the edge of the cover plate during the sealant preparation process. As a result, when subjected to external impact, such as falling from a height, the external impact is transmitted to the gap between the display substrate and the cover plate through the sealant, squeezing the display substrate, damaging the components in the display substrate, and affecting the display effect and reliability of the display substrate. Summary of the Invention

[0004] This invention provides a display module and its manufacturing method, as well as a display device, to prevent sealant from seeping into the gap between the display substrate and the cover plate assembly, thereby improving the display effect and service life of the display module.

[0005] In a first aspect, the present invention provides a display module, comprising: Display substrate; A cover plate assembly is located on the light-emitting surface side of the display substrate; the cover plate assembly includes a central region and at least a portion of an edge region surrounding the central region; the orthographic projection of the display substrate onto the cover plate assembly is located in the central region; the cover plate assembly includes a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure is located in the edge region; A sealant is located on the side of the cover plate body close to the display substrate; the sealant is at least partially disposed around the intermediate area, and the sealant is located on the side of the blocking structure away from the intermediate area.

[0006] In a second aspect, the present invention provides a method for manufacturing a display module, used to manufacture the display module of the first aspect, characterized in that it comprises: The display substrate and cover plate assemblies are provided separately; The cover plate assembly is attached to the light-emitting surface side of the display substrate; the cover plate assembly includes a central region and at least a portion of an edge region surrounding the central region; the orthographic projection of the display substrate onto the cover plate assembly is located in the central region; the cover plate assembly includes a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure is located in the edge region; A sealant is formed on the side of the cover plate body near the display substrate; the sealant is at least partially disposed around the intermediate area, and the sealant is located on the side of the barrier structure away from the intermediate area.

[0007] Thirdly, the present invention provides a display device, comprising: a display module as described in the first aspect.

[0008] The technical solution of this invention involves providing a cover plate assembly on the light-emitting surface side of the display substrate. This assembly protects the light-emitting surface of the display substrate and optimizes its light emission performance. At least a portion of the sealant surrounding the central area is provided on the side of the cover plate body closest to the display substrate, allowing the cover plate assembly to be assembled with the display device's frame, housing, or other structures via the sealant. Furthermore, by providing a cover plate assembly including a cover plate body and a blocking structure located on the side of the cover plate body closest to the display substrate, with at least a portion of the blocking structure situated at the edge, the blocking structure prevents the sealant from flowing towards the display substrate during sealant preparation. This ensures the sealant is located on the side of the blocking structure furthest from the central area, preventing it from seeping into the gap between the display substrate and the cover plate assembly. Consequently, when the sealant is subjected to an external impact from the edge area of ​​the cover plate assembly towards the central area, the impact is stopped at the location of the blocking structure, preventing further transmission of the impact to the display substrate. This avoids damage to the components within the display substrate, preventing the appearance of display black spots and thus improving the display effect and lifespan of the display module. Attached Figure Description

[0009] Figure 1 This is a partial structural diagram of a display module based on related technologies; Figure 2 This is a bottom-view structural diagram of a display module provided in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a display module provided in an embodiment of the present invention; Figure 4 This is a partial structural diagram of a display panel in an unbent state provided by an embodiment of the present invention; Figure 5 This is a partial structural diagram of a display panel in a bent state provided by an embodiment of the present invention; Figure 6 This is a partial structural schematic diagram of another display module provided in an embodiment of the present invention; Figure 7 This is a bottom view structural diagram of another display module provided in an embodiment of the present invention; Figure 8 This is a bottom-view structural diagram of another display module provided in an embodiment of the present invention; Figure 9 This is a bottom-view structural diagram of another display module provided in an embodiment of the present invention; Figure 10 This is a partial structural schematic diagram of another display module provided in an embodiment of the present invention; Figure 11 This is a schematic flowchart of a method for manufacturing a display module according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the manufacturing process of a display module provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0011] Figure 1 This is a partial structural diagram of a display module based on related technologies, such as... Figure 1 As shown, the display module 001 in the related technology includes a display substrate 010, a cover plate assembly 020 located on the light-emitting side of the display substrate, and an optical adhesive layer 030 located between the display substrate 010 and the cover plate assembly 020. The display substrate 010 may include a display panel 011, a functional film layer 012 located on the light-emitting side of the display panel 011, a support structure 013 located on the backlight side of the display panel 011, and a protective structure 014 covering the bending area of ​​the display panel 011, etc.; the cover plate assembly 020 may include a cover plate body 021.

[0012] In related technologies, a functional film layer 012 may be provided on the side of the display substrate 010 near the cover plate assembly 020. This functional film layer 012 may be, for example, a polarizer. Due to the edge bending structure of the display panel 011 or the assembly clearance space, the area of ​​the functional film layer 012 is usually smaller than the area of ​​the optical adhesive layer 030. In this case, the edge portion of the optical adhesive layer 030 extends beyond the edge of the functional film layer 012, causing at least a portion of the edge region of the optical adhesive layer 030 to not fully adhere to the functional film layer 012, thereby forming a gap between the display substrate 010 and the cover plate assembly 020.

[0013] After the cover plate assembly 020 is attached to the light-emitting surface of the display substrate 010, structures such as a middle frame and a back shell can be provided around the display substrate 010 and on the side of the display substrate 010 away from the cover plate assembly 020. At this time, the display module 001 may also include a sealant 040. The sealant 040 in the display module 001 is usually provided in the edge area of ​​the cover plate assembly 020. Since the sealant 040 has a certain fluidity before curing, the sealant 040 can easily flow along the edge of the cover plate assembly 020 into the gap between the display substrate 010 and the cover plate assembly 020, and penetrate into the gap between the display substrate 010 and the cover plate assembly 020. When the display module 001 is subjected to external impacts such as falling from a height, impact, or squeezing, the external impact may be transmitted through the cured sealant 040 to the gap between the display substrate 010 and the cover plate assembly 020, which may cause the display substrate 010 and the cover plate assembly 020 to separate, or cause damage such as cracks or peeling in the film layer of the display panel 011, ultimately causing display black spots to appear on the display module 001, affecting the display effect and service life of the display module 001.

[0014] To address the aforementioned technical problems, embodiments of the present invention provide a display module comprising: a display substrate; a cover plate assembly located on the light-emitting surface side of the display substrate; the cover plate assembly including a central region and at least a partially surrounding edge region; the orthographic projection of the display substrate onto the cover plate assembly located in the central region; the cover plate assembly including a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure located in the edge region; and a sealant located on the side of the cover plate body closer to the display substrate; the sealant at least partially surrounds the central region and is located on the side of the at least partially blocking structure away from the central region.

[0015] By employing the above technical solution, a cover plate assembly is provided on the light-emitting surface side of the display substrate to protect the light-emitting surface and optimize the light emission effect of the display substrate. At least a portion of the sealant surrounding the central area is provided on the side of the cover plate body closest to the display substrate, allowing the cover plate assembly to be assembled with the display device's frame, housing, and other structures via the sealant. Simultaneously, by providing a cover plate assembly including a cover plate body and a blocking structure located on the side of the cover plate body closest to the display substrate, with at least a portion of the blocking structure located at the edge area, the blocking structure prevents the sealant from flowing towards the display substrate during sealant preparation. This ensures the sealant is located on the side of the blocking structure furthest from the central area, preventing it from seeping into the gap between the display substrate and the cover plate assembly. When the sealant is subjected to an external impact from the edge area of ​​the cover plate assembly towards the central area, the impact is stopped at the location of the blocking structure, preventing further transmission of the impact to the display substrate. This avoids damage to the devices within the display substrate and the appearance of display black spots, thereby improving the display effect and lifespan of the display module.

[0016] The above is the core idea of ​​this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0017] Figure 2 This is a schematic diagram of a display module structure viewed from below, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of a partial film layer structure of a display module provided in an embodiment of the present invention, for reference. Figure 2 and Figure 3 The display module 100 includes a display substrate 10, which may include at least a display panel 110. The display panel 110 may have multiple pixels arranged in an array, and a driving circuit for driving the pixels to emit light for display. The display panel 110 may be a self-emissive display panel or a non-self-emissive display panel. Self-emissive display panels may include, for example, OLED display panels, micro LED display panels, mini LED display panels, etc., while non-self-emissive display panels may include electrophoretic display panels, liquid crystal display panels, etc. For ease of description, unless otherwise specified, the embodiments of the present invention use an OLED display panel as an example to illustrate the technical solutions of the embodiments of the present invention.

[0018] It is understood that the display panel 110 may include a substrate and a display functional layer located on one side of the substrate. By forming pixel circuits, light-emitting elements, and driving circuits in the display functional layer, the driving circuit can provide corresponding gate driving signals to the pixel circuits. Under the control of the gate driving signals, the pixel circuits write signals, thereby driving the light-emitting elements to emit light, so that the display area of ​​the display panel 110 can display the corresponding image. The substrate of the display panel 110 may be a flexible substrate, making the display panel 110 a flexible display panel. This gives the display panel 110 the characteristics of being bendable, foldable, and rollable. At least a portion of the non-display area surrounding the display area of ​​the display panel 110 can be bent to the side away from the display surface of the display panel 110, reducing the size of the non-display area on the display surface side. This results in a narrower bezel size on the display surface side of the display panel 110, meeting the display requirements for a high screen-to-body ratio.

[0019] Among them, in conjunction with reference Figures 2 to 5 When the display panel 110 is a flexible display panel, it may include at least two flat areas FA and a bending area BA located between two adjacent flat areas FA. The at least two flat areas FA may include at least one second flat area FA2 for setting the bonding component 140 and a first flat area FA1 for displaying the image. The second flat area FA2 can be bent to the backlight surface of the first flat area FA1 through the bending area BA. For example, the bonding component 140 may specifically include a flexible circuit board, a driver chip, and an electrostatic shielding structure covering at least a portion of the flexible circuit board and / or the driver chip. In this case, the display substrate 10 may also include an upper support plate 121, a lower support plate 122, and a heat dissipation layer 130 located between the lower support plate 121 and the upper support plate 122. The upper support plate 121 supports the first flat area FA1, and the lower support plate 122 supports the second flat area FA2.

[0020] In one exemplary embodiment, the second flat area FA2 for setting the binding component 140 in the display panel 110 can be located on the lower edge of the display module 100, so that the display panel 110 forms a bending area BA at the lower edge of the display module 100. In another exemplary embodiment, when the display module 100 is a two-sided curved screen or a four-sided curved screen, the display panel 110 can also form bending areas BA along multiple sides of the display module 100. For example, in a four-sided curved screen structure, the display panel 110 can form bending areas BA corresponding to the upper, lower, left, and right side edge areas of the display module 100; in a two-sided curved screen structure, the display panel 110 can form bending areas BA corresponding to the left and right or upper and lower side edge areas of the display module 100. The embodiments of the present invention do not specifically limit the specific setting position and number of bending areas BA.

[0021] Furthermore, the display substrate 10 may also be provided with a protective layer 150 that covers at least the bending area BA of the display panel 110. The protective layer 150 can protect the bending area BA and part of the flat area FA, preventing environmental factors such as moisture, oxygen, and temperature changes from damaging the devices disposed in the display panel 110. The display substrate 10 may also include a functional film layer 160 located on the light-emitting surface side of the display panel 110. This functional film layer 160 may include, but is not limited to, a polarizer, for improving the light transmittance and display contrast of the display substrate 10.

[0022] It should be noted that the above description is only an example of the structure of the display substrate 10. In the embodiments of the present invention, the structure of the display substrate 10 is not limited to this. That is, the specific structure of the display substrate 10 can be increased or decreased based on this. Under the premise of meeting the display requirements of the display substrate 10, the embodiments of the present invention do not make specific limitations in this regard.

[0023] Continue to refer to Figure 2 and Figure 3 As shown, the display module 100 also includes a cover plate assembly 20 located on the light-emitting surface side of the display substrate 10; the cover plate assembly 20 includes a central region CR and an edge region PR that at least partially surrounds the central region CR; the orthographic projection of the display substrate 10 onto the cover plate assembly 20 is located in the central region CR; the cover plate assembly 20 includes a cover plate body 21 and a blocking structure 22 located on the side of the cover plate body 21 near the display substrate 10; at least part of the blocking structure 22 is located in the edge region PR.

[0024] In the cover plate assembly 20, the edge area PR at least partially surrounds the middle area CR, that is, the edge area PR is wholly or partially surrounded by the middle area CR. When the edge area PR partially surrounds the middle area CR, the edge area PR can be located on one side or opposite sides of the middle area CR, etc. The specific design can be made according to actual needs, and the embodiments of the present invention do not make specific limitations in this regard.

[0025] Continue to refer to Figure 2 and Figure 3 The cover plate body 21 can be a glass cover plate. In this case, the cover plate assembly 20 may also include an anti-fingerprint layer, an anti-glare layer, and an explosion-proof film layer located on the side of the cover plate body 21 away from the display substrate 10. The cover plate assembly 20 can be bonded to the display substrate 10 through an optical adhesive layer 40. The specific structure of the cover plate body 21 and the bonding method between the cover plate body 21 and the display substrate 10 can be designed according to actual needs, and the embodiments of the present invention do not impose specific limitations on this.

[0026] The blocking structure 22 is located on the side of the cover plate body 21 closest to the display substrate 10, and may protrude from the surface of the cover plate body 21 on the side closest to the display substrate 10. The material of the blocking structure 22 may be the same as or different from the material of the cover plate body 21, and can be designed according to actual needs. This embodiment of the invention does not impose specific limitations on this. In an optional embodiment, the cover plate body 21 and the blocking structure 22 may be an integral structure. In this case, the material of the cover plate body 21 may be the same as the material of the blocking structure 22, and they may be formed under the same process.

[0027] In an exemplary embodiment, the blocking structure 22 can be integrally formed with the cover plate body 21. For example, the cover plate body 21 and the blocking structure 22 can be formed simultaneously by computer numerical control (CNC) machining. By making the cover plate body 21 and the blocking structure 22 an integral structure, additional assembly steps can be reduced, simplifying the manufacturing process of the cover plate assembly 20. At the same time, the connection between the blocking structure 22 and the cover plate body 21 can be improved, reducing the risk of the blocking structure 22 detaching, shifting, or separating during subsequent assembly, drop impact, or long-term use. The blocking structure 22 may include a stepped structure, a protruding structure, and a ramp structure, or a combination of the above structures. Provided that the blocking structure 22 protrudes from the surface of the cover plate body 21 near the display substrate 10, the specific shape of the blocking structure 22 is not limited in this embodiment of the invention.

[0028] It is understandable that after the cover plate assembly 20 is attached to the light-emitting surface side of the display substrate 10, structures such as a middle frame and a back shell can be provided around the display substrate 10 and on the side of the display substrate 10 away from the cover plate assembly 20. At this time, the display module 100 may also include a sealant 30, which may be located on the side of the cover plate body 21 close to the display substrate 10, and the sealant 30 is at least partially provided around the central area CR, so that the middle frame and other structures can be fixed by the sealant 30 and the display substrate 10 can be sealed and protected.

[0029] The sealant 30 can be formed in the edge region PR of the cover plate assembly 20 near the display substrate 10 by spraying, dispensing, or coating. Because the sealant 30 formed by spraying or dispensing has fluidity before curing, it diffuses towards the side closer to the center region CR. Understandably, after the sealant 30, due to its fluidity, penetrates the gap between the display substrate 10 and the cover plate assembly 20, when the edge of the display module 100 is subjected to external impact, such as from a drop, impact, or compression, this impact may be transmitted through the cured sealant 30 to the gap between the display substrate 10 and the cover plate assembly 20, causing separation between them, or resulting in cracks or peeling of the edge film layer of the display substrate 10, thereby affecting the display effect of the display module 100 and causing black spots to appear on the display module 100.

[0030] In this embodiment, by providing a blocking structure 22 in the edge region PR of the cover plate assembly 20, the sealant 30 can be prevented from seeping into the gap between the display substrate 10 and the cover plate assembly 20, so that the sealant 30 cannot enter the gap between the cover plate assembly 20 and the display substrate 10, and is stopped at least on the side of the blocking structure 22 away from the middle region CR, that is, the sealant 30 is located on the side of the blocking structure 22 away from the middle region CR. Thus, by positioning the sealant 30 on at least part of the blocking structure 22 away from the central region CR, the blocking structure 22 isolates the sealant 30 from the display substrate 10, preventing the sealant 30 from flowing further to the gap between the display substrate 10 and the cover plate assembly 20. This prevents the sealant 30 from transmitting the impact to the gap between the display substrate 10 and the cover plate assembly 20 when the edge of the display module 100 is subjected to external impact. This avoids the external impact causing the display substrate 10 and the cover plate assembly 20, as well as the film layers in the display substrate 10, to separate, thus preventing cracks, peeling, and other damage to the display substrate 10, which could lead to black spots on the display substrate 10. This effectively improves the display effect and lifespan of the display module 100.

[0031] It is understood that the sealant 30 is located on the side of at least part of the blocking structure 22 away from the central region CR, that is, the sealant 30 is located on the side of all or part of the blocking structure 22 away from the central region CR. In an exemplary embodiment, the blocking structure 22 may include a ramp surface, a stepped surface, or a curved surface, etc., in which case a portion of the blocking structure 22 is closer to the central region CR relative to the sealant 30, and another portion is farther away from the central region CR relative to the sealant 30. In another exemplary embodiment, the blocking structure 22 may include a plurality of blocking protrusions, which may be spaced apart along the direction from the central region CR to the edge region PR, in which case the sealant 30 may be located on the side of one or more blocking protrusions 22 away from the central region CR. Provided that the blocking structure 22 can form a blocking effect on the path of the sealant 30 flowing into the gap between the display substrate 10 and the cover plate assembly 20, the present invention does not specifically limit the arrangement of the blocking structure 22.

[0032] Optional, continue to refer to Figure 3 In the direction perpendicular to the light-emitting surface of the display substrate 10, the height of at least part of the blocking structure 22 is greater than the height of the sealant 30.

[0033] Specifically, by making at least part of the height of the blocking structure 22 greater than the height of the sealant 30, the blocking structure 22 can form a protrusion higher than the sealant 30 in the flow path of the sealant 30, thereby effectively restricting the sealant 30 from crossing the blocking structure 22 and preventing the sealant 30 from entering the gap between the display substrate 10 and the cover plate assembly 20, which is beneficial to improving the display effect and service life of the display module 100.

[0034] It should be noted that the blocking structures 22 at different locations can have different heights. In this case, at least some of the blocking structures 22 have a height greater than the height of the sealant 30. For example, the maximum height of the blocking structures 22 can be greater than the height of the sealant 30. Therefore, even if the sealant 30 passes over a portion of the blocking structure 22 with a lower height that is farther from the central region CR, the higher-height blocking structure 22 can still effectively block the sealant 30. When the blocking structure 22 includes multiple blocking protrusions, at least one of the blocking protrusions has a height greater than the height of the sealant 30. For example, the blocking protrusion closest to the central region CR can have a greater height than the sealant 30, so that even if the sealant 30 passes over the blocking protrusions farther from the central region CR, it can still be further blocked by the blocking protrusions closer to the central region CR, thereby improving the reliability of blocking the sealant 30.

[0035] In an alternative embodiment, reference continues. Figure 3When the display module 100 may further include an optical adhesive layer 40, and the optical adhesive layer 40 is located between the display substrate 10 and the cover plate assembly 20, the orthographic projection of the optical adhesive layer 40 on the cover plate assembly 20 may be located in the middle region CR; in the direction perpendicular to the light-emitting surface of the display substrate 10, the height of at least part of the blocking structure 22 is greater than the thickness of the optical adhesive layer 40.

[0036] The optical adhesive layer 40 is used to bond and fix the display substrate 10 to the cover plate assembly 20, and to improve the optical matching effect between the display substrate 10 and the cover plate assembly 20. For example, the optical adhesive layer 40 may include adhesive layer structures such as optically clear adhesive (OCA) and optically clear resin (OCR).

[0037] It is understandable that a functional film layer 160 is provided on the side of the display substrate 10 near the cover plate assembly 20. Due to the edge bending structure or clearance space of the display panel 110, the area of ​​the functional film layer 160 may be smaller than the area of ​​the optical adhesive layer 40. In this case, the edge portion of the optical adhesive layer 40 may extend beyond the edge of the functional film layer 160, causing at least a portion of the edge area of ​​the optical adhesive layer 40 to not fully adhere to the functional film layer 160, thereby creating a gap between the display substrate 10 and the cover plate assembly 20.

[0038] Continue to refer to Figure 3 In a direction perpendicular to the light-emitting surface of the display substrate 10, by making at least a portion of the height of the blocking structure 22 greater than the thickness of the optical adhesive layer 40, the blocking structure 22 can form a significant stop height at the gap between the display substrate 10 and the cover plate assembly 20. This effectively blocks the sealant 30 as it flows towards the gap between the display substrate 10 and the cover plate assembly 20. Thus, when the display module 100 is subjected to external impact, the impact can be prevented from being transmitted to the gap area between the display substrate 10 and the cover plate assembly 20 via the sealant 30. This prevents the risk of cracking or peeling of the film layer in the display substrate 10, or separation of the display substrate 10 from the cover plate assembly 20, due to the external impact transmitted through the sealant 30. This effectively protects the devices in the display substrate 10 from damage, avoids the formation of display black spots in the display module 100, and improves the display effect and lifespan of the display module 100.

[0039] In an alternative embodiment, reference is made to... Figure 6As shown, when the display substrate 10 includes a display panel 110 and a functional film layer 160, and the functional film layer 160 is located on the side of the display panel 110 near the cover plate assembly 20, a first gap 01 may exist between the display panel 110 and the optical adhesive layer 40, and the first gap 01 is located on the side of the functional film layer 160 near the edge region PR; in the direction perpendicular to the light-emitting surface of the display substrate 10, the thickness of the optical adhesive layer 40 is T1, the size of the first gap 01 is d1, and the height of at least the partially blocking structure 22 is H; wherein, H≥T1+d1.

[0040] Specifically, the functional film layer 160 is located on the side of the display panel 110 near the cover plate assembly 20. For example, the functional film layer 160 may include, but is not limited to, a polarizer, used to improve the light transmittance and display contrast of the display substrate 10. It is understood that when the display substrate 10 is bonded to the cover plate assembly 20 using optical adhesive 40, the optical adhesive layer 40 is located on the side of the functional film layer 160 away from the display panel 110, meaning the optical adhesive layer 40 contacts both the cover plate assembly 20 and the functional film layer 160. When the area of ​​the functional film layer 160 is smaller than the area of ​​the optical adhesive layer 40, the edge of the functional film layer 160 does not extend to the edge position of the optical adhesive layer 40. Therefore, on the side of the functional film layer 160 near the edge region PR, a first gap 01 not filled by the functional film layer 160 is formed between the display panel 110 and the optical adhesive layer 40.

[0041] In an exemplary embodiment, the display substrate 10 may also be provided with a protective layer 150 that covers at least the bending area BA of the display panel 110. The protective layer 150 can protect the bending area BA and part of the straight area FA. The protective layer 150 can fill part of the space within the first gap 01. The size d1 of the first gap 01 can be understood as the remaining gap size between the display panel 110 and the optical adhesive layer 40 that is not filled by the functional film layer 160 and / or the protective layer 150 and other structures in the direction perpendicular to the light-emitting surface of the display substrate 10.

[0042] Continue to refer to Figure 6As shown, in the direction perpendicular to the light-emitting surface of the display substrate 10, the height of at least part of the blocking structure 22 is H. This height H can be the maximum height of the blocking structure 22 in the direction perpendicular to the light-emitting surface of the display substrate 10. For example, when the blocking structure 22 includes a sloped surface or a stepped surface, the height H of the blocking structure 22 can be the height corresponding to the position of the blocking structure 22 farthest from the surface of the cover plate body 21 near the display substrate 10. At the same time, by setting the thickness of the optical adhesive layer 40 to T1, the size of the first gap 01 to d1, and H≥T1+d1, that is, the height H of at least part of the blocking structure 22 is greater than or equal to the sum of the thickness T1 of the optical adhesive layer 40 and the size d1 of the first gap 01, the blocking structure 22 can form a sufficient stop height on the path of the sealant 30 flowing into the first gap 01, so that even if the sealant 30 has a certain fluidity during the formation process, it is difficult for it to cross the blocking structure 22 and enter the first gap 01. This ensures that when the display module 100 is subjected to external impact, the external impact transmitted by the sealant 30 is stopped at the location of the blocking structure 22, preventing the external impact from being transmitted to the first gap 01 through the sealant 30, which could lead to cracks or peeling of the display substrate 10, or separation of the display substrate 10 from the cover plate assembly 20. This protects the devices on the display substrate 10, prevents the generation of display black spots in the display module 100, and thus helps to improve the display effect and service life of the display module 100.

[0043] In an alternative embodiment, reference continues. Figure 6 As shown, when the display substrate 10 includes a display panel 110, and the display panel 110 includes a first flat area FA1 and a second flat area FA2 opposite to each other, and a bent area BA connecting the first flat area FA1 and the second flat area FA2, the position point in the bent area BA that is farthest from the first flat area FA1 and the second flat area FA2 can be the first position point O2; in the direction perpendicular to the light-emitting surface of the display substrate 10, the distance between the first position point O2 and the cover plate body 21 is the first distance, and the highest height of the blocking structure 22 is the first height; the first height is less than the first distance.

[0044] Specifically, the display panel 110 may include a first flat area FA1 and a second flat area FA2, and a bending area BA connecting the first flat area FA1 and the second flat area FA2. The first flat area FA1 can be used for image display, and the second flat area FA2 can be used to bond driver chips, flexible circuit boards, and other driver circuit structures. The second flat area FA2 can be bent through the bending area BA to the side of the first flat area FA1 away from the display surface, thereby reducing the bezel size of the display module 100 on the display surface side.

[0045] Continue to refer to Figure 6As shown, the point furthest from the first straight area FA1 and the second straight area FA2 in the bending area BA is the first position point O2, which can be the apex of the bend in the bending area BA. In the direction perpendicular to the light-emitting surface of the display substrate 10, the distance between the first position point O2 and the cover plate body 21 is the first distance, and the maximum height of the blocking structure 22 is the first height. The first height is less than the first distance, thus providing a clearance space between the blocking structure 22 and the bending area BA.

[0046] Understandably, since the bending area BA typically includes multiple flexible film layers, signal traces, and protective structures, when setting the blocking structure 22, it is necessary to avoid the blocking structure 22 being too high and interfering with the bending area BA. By setting the first height of the blocking structure 22 to be less than the first distance, direct contact between the blocking structure 22 and the bending area BA of the display panel 110 is avoided, thereby reducing the risk of the blocking structure 22 impacting the bending area BA during whole-machine drops, assembly compression, or deformation. At the same time, it also avoids increasing the processing depth or processing difficulty of the cover plate body 21 to form an excessively high blocking structure 22, thereby improving the manufacturing yield of the cover plate assembly 20.

[0047] Furthermore, it is understandable that if the height of the blocking structure 22 is too high, the aspect ratio of the blocking structure 22 may increase accordingly, which may pose a risk of localized damage to the blocking structure 22 during CNC machining, transportation, or assembly. By limiting the first height of the blocking structure 22 to be less than the first distance, the structural reliability and service life of the display module 100 can be improved while ensuring that the blocking structure 22 has a blocking effect on the sealant 30.

[0048] In an alternative embodiment, reference continues. Figure 2 and Figure 6 As shown, at least part of the blocking structure 22 is located on the side of the bending zone BA away from the first straight zone FA1 and the second straight zone FA2.

[0049] It is understandable that the bending area BA connects the first flat area FA1 and the second flat area FA2. One of the first flat area FA1 and the second flat area FA2 is used to bond the driver chip, flexible circuit board and other devices, while the other is used to set the display unit. The display unit needs to be connected to the driver chip, flexible circuit board and other devices. The bending area BP usually has a more complex film layer stacking structure, which makes this area more prone to stress concentration when the display device is dropped or subjected to external impact.

[0050] By setting at least a portion of the blocking structure 22 on the side of the bending area BA away from the first straight area FA1 and the second straight area FA2, that is, during the preparation of the sealant 30, the blocking structure 22 can block at least a portion of the sealant 30 from flowing to the location of the bending area BA, preventing the sealant 30 from flowing to the bending area BA and the first gap 01 before curing. This reduces the possibility of external impact force being transmitted to the bending area BA and / or the first gap 01 through the sealant 30, preventing the lower frame area of ​​the display module 100 from developing display black spots due to drop impact, thereby improving the display effect and service life of the display module 100.

[0051] In another alternative embodiment, refer to Figure 7 As shown, the edge region PR includes the corner region COR; the corner region COR is located at the angle between two adjacent sides of the cover plate assembly 20; at least part of the blocking structure 22 is located in the corner region COR.

[0052] Understandably, when a display device is dropped, the corners of the cover plate assembly 20 are more likely to come into contact with the ground or other external objects first than the straight edges, making the corner area COR more susceptible to impact loads. If the sealant 30 seeps into the first gap 01 at the corner area COR, or if the corner area COR is subjected to external impact, the impact force can easily be transmitted to the edge area of ​​the display substrate 10 through the cured sealant 30, causing display black spots to appear at the corners of the display module 100. Therefore, by providing at least a partial blocking structure 22 at the corner area COR, a stop is formed for the sealant 30 at the corners of the cover plate assembly 20, thereby reducing the risk of the sealant 30 flowing into the first gap 01 at the corner area COR, preventing display black spots from appearing at the corners of the display module 100 due to external impacts, and thus improving the lifespan of the display module 100's display effect.

[0053] Optionally, at least part of the blocking structure 22 is set around the central area CR.

[0054] It is understood that at least part of the blocking structure 22 is arranged around the central area CR, that is, part or all of the blocking structure 22 is arranged around the central area CR, in order to improve the impact resistance reliability of the display module 100 under different drop postures. The specific arrangement of the blocking structure 22 can be set according to actual needs, and the present invention does not limit it.

[0055] In one exemplary embodiment, reference is made to... Figure 8As shown, the blocking structure 22 can be provided only in the four corner areas COR of the cover plate assembly 20 to form a blocking effect on the sealant 30 at the four corner positions of the cover plate assembly 20, reducing the risk of the sealant 30 seeping into the gap between the display substrate 10 and the cover plate assembly 20 in the corner area COR, thereby improving the impact resistance reliability of the display module 100 under different drop postures, and reducing the risk of black spots on the display module 100 caused by sealant seepage and external impact in the corner area.

[0056] In another exemplary embodiment, reference is made to... Figure 9 As shown, the blocking structure 22 can be arranged around the middle area CR along the upper and lower edge areas of the cover plate assembly 20, and the blocking structure 22 can be correspondingly arranged in the two corner areas COR on the lower side and / or the two corner areas COR on the upper side of the cover plate assembly 20, so as to improve the problem of black spots on the display when the corners of the display device are dropped.

[0057] In an alternative embodiment, reference is made to... Figure 10 As shown, the blocking structure 22 includes at least two blocking protrusions 23; each blocking protrusion 23 is arranged in the direction from the middle region CR to the edge region PR.

[0058] Specifically, each blocking protrusion 23 in the blocking structure 22 can be located on the side of the cover plate body 21 near the display substrate 10, and arranged in the direction from the middle region CR to the edge region PR. By making the blocking structure 22 include at least two blocking protrusions 23, a multi-level blocking structure can be formed on the path of the sealant 30 flowing into the first gap 01. Even if some of the sealant 30 crosses the blocking protrusion 23 far from the middle region CR, it can still be blocked by other blocking protrusions 23 near the middle region CR, thereby further reducing the risk of the sealant 30 seeping into the first gap 01.

[0059] Based on the above embodiments, optionally, refer to the following: Figure 10 As shown, two adjacent blocking protrusions 23 are respectively the first blocking protrusion 231 and the second blocking protrusion 232; the first blocking protrusion 231 is located on the side of the second blocking protrusion 232 near the middle area CR; in the direction perpendicular to the light-emitting surface of the display substrate 10, the height of the first blocking protrusion 231 is greater than the height of the second blocking protrusion 232.

[0060] Specifically, among two adjacent blocking protrusions 23, the first blocking protrusion 231 is located on the side of the second blocking protrusion 232 closer to the middle region CR, and in the direction perpendicular to the light-emitting surface of the display substrate 10, the height of the first blocking protrusion 231 is greater than the height of the second blocking protrusion 232. That is, in the direction in which the sealant 30 flows from the edge region PR to the middle region CR, the height of the multiple blocking protrusions 23 can gradually increase, so that the blocking protrusion 23 closer to the middle region CR has a larger blocking height.

[0061] With the above configuration, the second blocking protrusion 232 near the edge region PR can initially block the sealant 30, reducing its flow rate and volume. Simultaneously, the first blocking protrusion 231 near the middle region CR has a greater height, further blocking any small amount of sealant 30 that has already passed the second blocking protrusion 232, thus creating a progressively stronger blocking effect from the edge region PR to the middle region CR. This improves the reliability of the blocking structure 22 in blocking the sealant 30 and reduces the risk of the sealant 30 contacting the display substrate 10 or entering the first gap 01.

[0062] Based on the same inventive concept, this invention also provides a method for manufacturing a display module. Figure 11 This is a schematic flowchart of a method for manufacturing a display module according to an embodiment of the present invention. Figure 12 This is a structural schematic diagram of the manufacturing process of a display module provided in an embodiment of the present invention, combined with... Figure 11 and Figure 12 As shown, the manufacturing method of this display module includes: S101 provides a display substrate and a cover plate assembly respectively.

[0063] Specifically, to fabricate a display module, a display substrate 10 and a cover plate assembly 20 can be fabricated first. The display substrate 10 may include at least a display panel 110, which can be a flexible display panel. The display panel 110 may include a flexible substrate and a display functional layer located on one side of the substrate. The fabrication process of the display panel 110 may include forming the display functional layer on the flexible substrate by means of chemical vapor deposition, physical vapor deposition, or atomic layer deposition. The display functional layer may include pixel circuits, light-emitting elements, and driving circuits. The driving circuits can provide corresponding gate driving signals to the pixel circuits, enabling the pixel circuits to write signals under the control of the gate driving signals, thereby driving the light-emitting elements to emit light, so that the display area of ​​the display panel 110 can display the corresponding image.

[0064] When the display panel 110 is a flexible display panel, a support structure can be attached to the non-bending area of ​​the display panel 110 after its formation. For example, the display panel 110 may include a first flat area FA1, a second flat area FA2, and a bending area BA connecting the first flat area FA1 and the second flat area FA2. The first flat area FA1 can be used for image display, and the second flat area FA2 can be used to bond driving circuit structures such as driver chips and flexible circuit boards. A support plate 121 can be attached to the side of the first flat area FA1 away from the light-emitting surface, and a lower support plate 122 can be attached to the side of the second flat area FA2 away from the light-emitting surface. This provides support for the first flat area FA1 and the second flat area FA2 through the upper support plate 121 and the lower support plate 122, respectively, thereby reducing the risk of deformation of the display panel 110 during subsequent bending and assembly processes.

[0065] After bending the display panel 110, the second flat area FA2 is bent through the bending area BA to the side of the first flat area FA1 away from the light-emitting surface, thereby reducing the size of the non-display area on the display side. This results in a narrower bezel on the display side of the display panel 110, meeting the display requirements for a high screen-to-body ratio. After bending, a protective layer 150 can be formed in the bending area BA and its adjacent areas. This protective layer 150 can be formed by coating, dispensing, or spraying, and is used to protect the bending area BA and part of the flat area FA, preventing environmental factors such as moisture, oxygen, and temperature changes from damaging the components installed in the display panel 110.

[0066] Furthermore, a functional film layer 160 can be attached to the light-emitting side of the display panel 110. For example, the functional film layer 160 may include a polarizer to improve the light transmittance, display contrast, etc., of the display substrate 10. A driving circuit structure can also be bonded to the display panel 110, for example, a bonding component 140 can be disposed in the second flat region FA2 to provide display driving signals to the display panel 110 using a driving chip in the bonding component 140.

[0067] Optionally, before providing the cover assembly 20, the method further includes: providing a cover substrate; and processing the cover substrate by a milling process to form a cover body 21 and a blocking structure 22 located on one side of the cover body 21.

[0068] Specifically, the fabrication process of the cover plate assembly 20 may include providing a cover plate substrate with a preset thickness and machining the shape of the cover plate substrate. For example, the cover plate substrate can be machined using CNC milling. Through CNC milling, grinding, or other methods, a blocking structure 22 can be formed on the side of the cover plate body 21 near the display substrate 10 while simultaneously forming the shape of the cover plate body 21. The blocking structure 22 may include a stepped structure, a raised structure, a ramp structure, or a combination of the above structures. This allows the blocking structure 22 and the cover plate body 21 to be integrated, reducing additional assembly steps and simplifying the fabrication process of the cover plate assembly 20. Simultaneously, it improves the connection strength between the blocking structure 22 and the cover plate body 21, reducing the risk of the blocking structure 22 detaching, shifting, or separating during subsequent assembly, drop impacts, or long-term use, thereby improving the blocking reliability of the blocking structure 22 against the sealant 30.

[0069] After forming the cover plate body 21 and the blocking structure 22, functional film layers can also be provided on the cover plate body 21. For example, an anti-fingerprint layer, an anti-glare layer, and an explosion-proof film layer can be formed on the side of the cover plate body 21 opposite to the display substrate 10, thereby preparing the cover plate assembly 20.

[0070] S102. Attach the cover plate assembly to the light-emitting side of the display substrate.

[0071] The cover plate assembly 20 includes a central region CR and an edge region PR that at least partially surrounds the central region CR; the orthographic projection of the display substrate 10 onto the cover plate assembly 20 is located in the central region CR; and at least part of the blocking structure 22 is located in the edge region PR.

[0072] Specifically, the cover plate assembly 20 can be disposed on the light-emitting surface side of the display substrate 10, and the cover plate assembly 20 can be bonded and fixed to the display substrate 10 by an optical adhesive layer 40. The optical adhesive layer 40 may include, for example, an OCA optical adhesive layer or an OCR optical adhesive layer. The optical adhesive layer 40 can achieve bonding and fixation between the cover plate assembly 20 and the display substrate 10 while ensuring light transmittance, and improve the optical matching effect between the two.

[0073] During the bonding process, the orthographic projection of the display substrate 10 onto the cover plate assembly 20 can be positioned in the central region CR, and the blocking structure 22 can be positioned at least partially in the edge region PR of the cover plate assembly 20. Thus, the blocking structure 22 can be located on the path of the subsequent flow of sealant 30 into the gap between the display substrate 10 and the cover plate assembly 20, thereby providing a structural basis for the subsequent flow of the blocking sealant 30 into the gap between the display substrate 10 and the cover plate assembly 20.

[0074] S103. A sealant is formed on the side of the cover plate body near the display substrate.

[0075] The sealant 30 is disposed at least partially around the intermediate region CR, and the sealant 30 is located on the side of the blocking structure 22 away from the intermediate region CR.

[0076] Specifically, after the cover plate assembly 20 is bonded to the display substrate 10, a sealant 30 can be formed on the side of the cover plate body 21 near the display substrate 10. The sealant 30 can be formed by spraying, dispensing, or coating, and is at least partially surrounding the central area CR. The sealant 30 can be used to fix the cover plate assembly 20 to the mid-frame of the display device during subsequent assembly, thereby sealing and protecting the edge area of ​​the display substrate 10. Since the sealant 30 formed by spraying or dispensing is fluid before curing, if a corresponding blocking structure 22 is not provided, the sealant 30 can easily flow along the edge area PR of the cover plate assembly 20 and enter the gap between the cover plate assembly 20 and the display substrate 10.

[0077] Understandably, after the sealant 30, due to its own fluidity, seeps into the gap between the display substrate 10 and the cover plate assembly 20, when the edge of the display module 100 is subjected to external impacts such as drops, collisions, or compression, the impact force may be transmitted through the cured sealant 30 to the gap between the display substrate 10 and the cover plate assembly 20, causing separation between the display substrate 10 and the cover plate assembly 20, or resulting in cracks, peeling, or other damage to the edge film layer of the display substrate 10, thereby affecting the display effect of the display module 100 and causing display black spots. By providing a blocking structure 22 in the edge area PR of the cover plate assembly 20, the sealant 30 can be prevented from seeping into the gap between the display substrate 10 and the cover plate assembly 20. Therefore, when the edge of the display module 100 is subjected to external impacts, the impact force can be prevented from causing the display substrate 10 and the cover plate assembly 20 to separate, avoiding failures such as cracks and peeling of the display substrate 10, thereby preventing display black spots from appearing in the display module 100, improving the display effect and service life of the display module 100.

[0078] The above-described method for manufacturing the display module can be used to prepare the display module provided in any embodiment of the present invention, which possesses the corresponding functions and beneficial effects of the display module. Technical details not described in detail in this embodiment can be found in the display module provided in any embodiment of the present invention.

[0079] Since the above-described method for preparing the display module can be used to prepare the display module in the embodiments of the present invention, those skilled in the art can understand the specific implementation methods and various variations of the method for preparing the display module in this embodiment based on the display module described in the embodiments of the present invention. Therefore, how the method for preparing the display module is implemented will not be described in detail here. Any method for preparing the display module in the embodiments of the present invention implemented by those skilled in the art falls within the scope of protection of this application.

[0080] Based on the same inventive concept, embodiments of the present invention also provide a display device, which includes the display module provided in any embodiment of the present invention. Therefore, this display device possesses the technical features of the display module provided in the embodiments of the present invention and can achieve the beneficial effects of the display module provided in the embodiments of the present invention. Similarities can be found in the above description of the display module provided in the embodiments of the present invention, and will not be repeated here.

[0081] For example, Figure 13 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, such as... Figure 13 As shown, the display device 200 includes the display module 100 provided in this embodiment of the invention. The display device 200 provided in this embodiment of the invention can be any electronic product with display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc., and this embodiment of the invention does not make any special limitations on these categories.

[0082] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display module, characterized in that, include: Display substrate; A cover plate assembly is located on the light-emitting surface side of the display substrate; the cover plate assembly includes a central region and an edge region that at least partially surrounds the central region; The orthographic projection of the display substrate onto the cover plate assembly is located in the middle region; the cover plate assembly includes a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure is located in the edge region; A sealant is located on the side of the cover plate body close to the display substrate; the sealant is at least partially disposed around the intermediate area, and the sealant is located on the side of the blocking structure away from the intermediate area.

2. The display module according to claim 1, characterized in that, Also includes: An optical adhesive layer is located between the display substrate and the cover plate assembly; The orthographic projection of the optical adhesive layer on the cover plate assembly is located in the middle region; In a direction perpendicular to the light-emitting surface of the display substrate, at least a portion of the height of the blocking structure is greater than the thickness of the optical adhesive layer.

3. The display module according to claim 2, characterized in that, The display substrate includes a display panel and a functional film layer; the functional film layer is located on the side of the display panel near the cover plate assembly; There is a first gap between the display panel and the optical adhesive layer, and the first gap is located on the side of the functional film layer near the edge area; In the direction perpendicular to the light-emitting surface of the display substrate, the thickness of the optical adhesive layer is T1, the size of the first gap is d1, and the height of at least a portion of the blocking structure is H; wherein, H≥T1+d1.

4. The display module according to claim 1, characterized in that, In a direction perpendicular to the light-emitting surface of the display substrate, at least a portion of the height of the blocking structure is greater than the height of the sealant.

5. The display module according to claim 2 or 4, characterized in that, The display substrate includes a display panel; the display panel includes a first flat area and a second flat area opposite to each other, and a bent area connecting the first flat area and the second flat area; the point in the bent area furthest from the first flat area and the second flat area is the first position point; In the direction perpendicular to the light-emitting surface of the display substrate, the distance between the first position point and the cover plate body is the first distance, and the maximum height of the blocking structure is the first height; the first height is less than the first distance.

6. The display module according to claim 1, characterized in that, The display substrate includes a display panel; the display panel includes a first flat area and a second flat area opposite to each other, and a bent area connecting the first flat area and the second flat area; At least a portion of the blocking structure is located on the side of the bending area away from the first straight area and the second straight area.

7. The display module according to claim 1, characterized in that, include: The edge region includes a corner region; the corner region is located at the angle between two adjacent sides of the cover plate assembly; at least a portion of the blocking structure is located in the corner region.

8. The display module according to claim 1, characterized in that, At least a portion of the blocking structure is arranged around the intermediate region.

9. The display module according to claim 1, characterized in that, The cover plate body and the blocking structure are an integral structure.

10. The display module according to claim 1, characterized in that, The blocking structure includes at least two blocking protrusions; each of the blocking protrusions is arranged along the direction from the middle region to the edge region.

11. The display module according to claim 10, characterized in that, The two adjacent blocking protrusions are respectively the first blocking protrusion and the second blocking protrusion; the first blocking protrusion is located on the side of the second blocking protrusion closer to the middle area; In a direction perpendicular to the light-emitting surface of the display substrate, the height of the first blocking protrusion is greater than the height of the second blocking protrusion.

12. A method for manufacturing a display module, used to manufacture the display module according to any one of claims 1-11, characterized in that, include: The display substrate and cover plate assemblies are provided separately; The cover plate assembly is attached to the light-emitting surface side of the display substrate; the cover plate assembly includes a central region and at least a portion of an edge region surrounding the central region; the orthographic projection of the display substrate onto the cover plate assembly is located in the central region; the cover plate assembly includes a cover plate body and a blocking structure located on the side of the cover plate body closer to the display substrate; at least a portion of the blocking structure is located in the edge region; A sealant is formed on the side of the cover plate body near the display substrate; The sealant is disposed at least partially around the intermediate region, and the sealant is located on the side of the barrier structure away from the intermediate region at least partially.

13. The method for preparing a display module according to claim 12, characterized in that, Prior to providing the cover plate assembly, it also includes: Provide cover plate substrate; The cover plate substrate is processed by a milling process to form the cover plate body and the blocking structure located on one side of the cover plate body.

14. A display device, characterized in that, include: The display module according to any one of claims 1-11.

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