Display module and display device

Abstract

The embodiment of the utility model provides a display module and a display device, and the display module comprises a back plate, a rubber frame and a display screen, the rubber frame is arranged on one side of the back plate and comprises a first top wall and a first side wall which are connected with each other; the first top wall and the first side wall are annular, the first side wall is arranged around the edge of the back plate, and the first top wall is located on the side, away from the back plate, of the first side wall; an annular groove is formed in the side, facing the back plate, of the first side wall and divides the first side wall into an inner side wall located on the inner side of the annular groove and an outer side wall located on the outer side of the annular groove. The back plate comprises a main body part, a bearing part surrounding the main body part and an insertion part surrounding the bearing part; the insertion part extends from the bearing part to the direction close to the rubber frame and is inserted into the annular groove, so that one end, close to the back plate, of the inner side wall is in close contact with the bearing part; the display screen is arranged on the side, away from the back plate, of the first top wall of the rubber frame and is in sealing connection with the first top wall in the circumferential direction, and the dustproof effect of the display module is improved.

Description

A display module and display device Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] With the increasing application scenarios of display modules, users have higher and higher requirements for the dustproof performance of display modules. Display modules in related technologies include a display screen, a frame, and a backplate. These three components together enclose a space containing structures such as backlight components. Due to the gaps between these components, dust can enter the space through these gaps, resulting in poor dustproof performance and making the display module unsuitable for outdoor or other dusty applications. Therefore, improving the dustproof performance of display modules is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a display module and display device to improve the dustproof effect of the display module. The specific technical solution is as follows:

[0004] An embodiment of the first aspect of this application provides a display module, comprising: a back panel, a frame, and a display screen; the frame is disposed on one side of the back panel and includes a first top wall and a first side wall connected together; both the first top wall and the first side wall are annular, the first side wall is disposed around the edge of the back panel, and the first top wall is located on the side of the first side wall away from the back panel; the side of the first side wall facing the back panel has an annular groove, the annular groove dividing the first side wall into an inner side wall located inside the annular groove and an outer side wall located outside the annular groove; the back panel includes a main body, a support portion surrounding the main body, and an insertion portion surrounding the support portion; the insertion portion extends from the support portion toward the frame and is inserted into the annular groove, so that the end of the inner side wall near the back panel is in close contact with the support portion; the display screen is disposed on the side of the first top wall of the frame away from the back panel and is sealed to the first top wall in its circumferential direction.

[0005] In some embodiments of this application, the width of the annular groove is greater than or equal to 0.9 mm;

[0006] And / or, the distance between the insertion part and the inner wall of the annular groove is 0.1-0.3 mm.

[0007] In some embodiments of this application, the end of the outer wall away from the display screen is flush with the side of the support portion away from the display screen.

[0008] In some embodiments of this application, the insertion portion has multiple snap-fit ​​protrusions on the side facing the outer wall;

[0009] The outer wall is provided with multiple buckle openings at positions corresponding to the multiple buckle protrusions; the multiple buckle openings are engaged and fixed in a one-to-one manner with the multiple buckle protrusions.

[0010] In some embodiments of this application, the protrusion height of the buckle protrusion is 0.3-0.5mm.

[0011] In some embodiments of this application, the display screen and the first top wall of the frame are sealed with a screen sealing adhesive;

[0012] The sealing adhesive is located between the edge of the display screen and the first top wall of the adhesive frame, and is arranged in a ring shape so that the display screen and the first top wall are spaced apart.

[0013] In some embodiments of this application, the sealing adhesive is a double-sided polyurethane foam tape, comprising a first black polyacrylic adhesive layer, a first black polyester film layer, a polyurethane foam layer, a second black polyester film layer, and a second black polyacrylic adhesive layer stacked sequentially.

[0014] In some embodiments of this application, the display module further includes: a front frame; the front frame includes a second top wall and a second side wall connected together; the second side wall is arranged around the outside of the frame, the back plate and the display screen; the second top wall is located at one end of the second side wall near the display screen, is disposed on the side of the display screen away from the back plate, and overlaps with the edge of the display screen;

[0015] An elastic sealing layer is provided between the second top wall and the edge of the display screen.

[0016] In some embodiments of this application, a first through hole is provided on the second sidewall;

[0017] A second through hole is provided on the outer wall at a position corresponding to the first through hole;

[0018] The insertion part is provided with a third through hole at a position corresponding to the second through hole;

[0019] Fasteners pass through the first through hole, the second through hole, and the third through hole in sequence to fix the front frame, the rubber frame, and the back plate together.

[0020] In some embodiments of this application, the insertion part protrudes outward from the position where the third through hole is located, forming a protruding structure, and two adjacent protruding structures are connected by a connecting segment;

[0021] The protruding structure includes a straight section and inclined sections located on both sides of the straight section, and the straight section is connected to the connecting section through the inclined sections;

[0022] The third through hole is provided on the straight section;

[0023] The free end of the insertion part is provided with a plurality of spaced notches, each of the notches extending from the connecting section through the inclined section to the straight section;

[0024] The depth of the notch is less than or equal to 0.5 mm;

[0025] The shapes of the inner and outer sidewalls are adapted to the shape of the insertion portion.

[0026] In some embodiments of this application, the display module further includes: an optical film layer;

[0027] The optical film layer is disposed between the back plate and the first top wall, and its edge is supported by the supporting part;

[0028] The end of the first top wall away from the first side wall extends toward the optical film layer to form an extension portion, which is spaced apart from the optical film layer.

[0029] In some embodiments of this application, the distance between the extension and the optical film is 0.3-0.5 mm.

[0030] In some embodiments of this application, the outer wall is provided with a first chamfer at the opening of the annular groove;

[0031] The inner sidewall has a second chamfer at the opening of the annular groove.

[0032] An embodiment of the second aspect of this application provides a display device including a display module according to any embodiment of the first aspect.

[0033] Beneficial effects:

[0034] The display module of this application embodiment includes a back plate, a frame, and a display screen. The frame is disposed on one side of the back plate and includes a first top wall and a first side wall connected together. Both the first top wall and the first side wall are annular. The first side wall surrounds the edge of the back plate, and the first top wall is located on the side of the side wall away from the back plate. The side of the first side wall facing the back plate has an annular groove, which divides the first side wall into an inner side wall located inside the annular groove and an outer side wall located outside the annular groove. The back plate includes a main body, a support portion surrounding the main body, and an insertion portion surrounding the support portion. The insertion portion extends from the support portion toward the frame and inserts into the annular groove so that the end of the inner side wall near the back plate is in close contact with the support portion, i.e., a gap is provided between the end of the inner side wall near the back plate and the support portion, so that the contact position of the two forms an annular seal. The frame has the function of supporting and limiting the display screen. The display screen is disposed on the side of the first top wall of the frame away from the back plate and is sealed to the first top wall in its circumferential direction, so that an annular seal is formed between the two. In the display module of this application embodiment, an annular seal is formed at the connection between the back plate and the frame, and an annular seal is formed at the connection between the display screen and the frame. The two annular seals block the path for dust to enter the interior of the display module, preventing dust from entering the containment space enclosed by the back plate, frame, and display screen through the gap between the back plate and the frame, and the gap between the display screen and the frame. This improves the dustproof effect of the display module and makes it suitable for outdoor and other dusty application scenarios.

[0035] The display device of this application embodiment includes a display module according to any embodiment of the first aspect. The connection between the back plate and the frame of the display module forms an annular seal, and the connection between the display screen and the frame forms an annular seal. The two annular seals block the path for dust to enter the interior of the display module, preventing dust from entering the containment space enclosed by the back plate, frame, and display screen through the gap between the back plate and the frame, and the gap between the display screen and the frame. This improves the dustproof effect of the display module, making it suitable for outdoor and other dusty application scenarios, thereby improving the dustproof effect of the display device and expanding its application range.

[0036] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0038] Figure 1 is a schematic diagram of the structure of the display module according to an embodiment of this application;

[0039] Figure 2 is a cross-sectional view AA of Figure 1;

[0040] Figure 3 is a schematic diagram of the exploded structure of Figure 1;

[0041] Figure 4 is a BB cross-sectional view of Figure 1;

[0042] Figure 5 is a magnified view of part P in Figure 4;

[0043] Figure 6 is an exploded structural diagram of the back plate and the frame in the embodiment of this application;

[0044] Figure 7 is a schematic diagram of the assembly of the back plate and the frame in an embodiment of this application;

[0045] Figure 8 is a magnified view of part Q in Figure 7;

[0046] Figure 9 is a CC cross-sectional view of Figure 1;

[0047] Figure 10 is a magnified view of part O in Figure 9;

[0048] Figure 11 is a sectional view of DD in Figure 1;

[0049] Figure 12 is a partially enlarged exploded view of the back plate and the frame in the embodiment of this application;

[0050] Figure 13 is the front view of the assembled structure shown in Figure 12;

[0051] Figure 14 is a front view of the back panel in Figure 13;

[0052] Figure 15 is an exploded structural diagram of the frame and back plate in another embodiment of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] Back panel 100; Main body 110; Supporting part 120; Insertion part 130; Protruding structure 131; Straight section 1311; Inclined section 1312; Connecting section 132; Third through hole 133; Notch 134; Reinforcing part 135; Buckle protrusion 136; Frame 200; First top wall 210; Extension part 211; First side wall 220; Annular groove 221; Inner side wall 222; Second chamfer 2221; Clearance space 2222; Outer side wall 223; Second through hole 2231; First chamfer 2232; Buckle opening 2233; Sub-segment 201; Display screen 300; Sealing adhesive 400; Front frame 500; Second top wall 510; Second side wall 520; First through hole 521; Elastic sealing layer 600; Optical film layer 700; Composite film material 710; Diffuser plate 720; Reflector sheet 730; Opening 731; Light source 740; Lamp bead 741; Fixing foam 800; Fastener 900. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0056] With the increasing application scenarios of display modules, users have higher and higher requirements for the dustproof performance of display modules. Display modules in related technologies include a display screen, a frame, and a backplate. These three components together enclose a space containing structures such as backlight components. Due to the gaps between these components, dust can enter the space through these gaps, resulting in poor dustproof performance and making the display module unsuitable for outdoor or other dusty applications. Therefore, improving the dustproof performance of display modules is a problem that urgently needs to be solved by those skilled in the art.

[0057] To address the aforementioned technical problems, this application proposes a display module and a display device.

[0058] As shown in Figures 1 to 4, Figure 1 is a structural schematic diagram of the display module according to an embodiment of this application, Figure 2 is a cross-sectional view AA of Figure 1, Figure 3 is an exploded structural schematic diagram of Figure 1, and Figure 4 is a cross-sectional view BB of Figure 1. An embodiment of the first aspect of this application proposes a display module, which includes a back panel 100, a frame 200, and a display screen 300 (Open Cell, OC). Specifically, the frame 200 is disposed on one side of the back panel 100, including a first top wall 210 and a first side wall 220 connected together; both the first top wall 210 and the first side wall 220 are annular, the first side wall 220 surrounds the edge of the back panel 100, and the first top wall 210 is located on the side of the first side wall 220 away from the back panel 100; the side of the first side wall 220 facing the back panel 100 is provided with an annular groove 221, which divides the first side wall 220 into an inner side wall 222 located inside the annular groove 221 and a side wall 222 located inside the annular groove 221. The outer sidewall 223 of the groove 221; the back plate 100 includes a main body 110, a support portion 120 surrounding the main body 110 and an insertion portion 130 surrounding the support portion 120; the insertion portion 130 extends from the support portion 120 toward the frame 200 and is inserted into the annular groove 221 so that the end of the inner sidewall 222 near the back plate 100 is in close contact with the support portion 120; the display screen 300 is disposed on the side of the first top wall 210 of the frame 200 away from the back plate 100 and is sealed to the first top wall 210 in its circumferential direction.

[0059] It should be noted that in the embodiments of this application, "inside" refers to the direction towards the inside of the display module, and "outside" refers to the direction towards the outside of the display module.

[0060] The display module of this application embodiment includes a back plate 100, a frame 200, and a display screen 300. The frame 200 is disposed on one side of the back plate 100 and includes a first top wall 210 and a first side wall 220 connected together; both the first top wall 210 and the first side wall 220 are annular, the first side wall 220 is disposed around the edge of the back plate 100, and the first top wall 210 is located on the side of the side wall away from the back plate 100; the side of the first side wall 220 facing the back plate 100 is provided with an annular groove 221, the annular groove 221 dividing the first side wall 220 into an inner side wall 222 located inside the annular groove 221 and an outer side wall 223 located outside the annular groove 221; the back plate 100 includes a main body 110, a supporting part 120 surrounding the main body 110, and a surrounding part... The insertion portion 130 of the support portion 120 extends from the support portion 120 toward the frame 200 and is inserted into the annular groove 221 so that the end of the inner sidewall 222 near the back plate 100 is in close contact with the support portion 120, that is, the end of the inner sidewall 222 near the back plate 100 is provided with zero gap between it and the support portion 120, so that the contact position of the two forms an annular seal; the frame 200 has the function of supporting and limiting the display screen 300. The display screen 300 is disposed on the side of the first top wall 210 of the frame 200 away from the back plate 100, and is sealed to the first top wall 210 in the circumferential direction, so that an annular seal is formed between the two. In the display module of this application embodiment, an annular seal is formed at the connection between the back plate 100 and the frame 200, and an annular seal is formed at the connection between the display screen 300 and the frame 200. The two annular seals block the path for dust to enter the interior of the display module, preventing dust from entering the containment space enclosed by the back plate 100, the frame 200, and the display screen 300 through the gap between the back plate 100 and the frame 200, and the gap between the display screen 300 and the frame 200. This improves the dustproof effect of the display module and makes it suitable for outdoor and other dusty application scenarios.

[0061] The display module of this application embodiment can prevent dust particles larger than or equal to 2μm from entering the containment space enclosed by the display screen 300, back plate 100 and frame 200 when the whole machine is placed horizontally or vertically and is in the lit state. It has passed the 2μm pink dust test in the Kanto region and can be used as a commercial display digital signage for outdoor applications.

[0062] Furthermore, in related technologies, the dustproof effect is improved by attaching a long strip of auxiliary material to block the assembly gap between the frame and the back plate after they are assembled. However, this method involves a lot of long auxiliary material, which is difficult to operate on the production line, wastes time, and is prone to poor adhesion, resulting in NG (non-compliant) dust tests. Compared with the method of attaching auxiliary material for dustproofing, the display module of this application embodiment does not require the attachment of auxiliary material. The full-enclosure structure of the frame 200 and the back plate 100 improves the dustproof effect of the display module, enabling the display module to meet the dust test standard requirements, reducing the additional cost of manual attachment of auxiliary material, and improving production efficiency.

[0063] Optionally, as shown in Figure 4, the end face of the inner sidewall 222 near the back plate 100 can be an annular plane, and the contact position between the bearing portion 120 and the inner sidewall 222 can be a plane, forming an annular seal. The insertion portion 130 can be arranged perpendicular to the bearing portion 120, and the insertion portion 130 is arranged around the bearing portion 120 in an annular shape, with the annular groove 221 matching the shape of the insertion portion 130. In some embodiments of this application, as shown in Figure 5, which is a partially enlarged schematic diagram of point P in Figure 4, the width f of the annular groove 221 (sealing groove) is greater than or equal to 0.9 mm; and / or, the distance between the insertion portion 130 and the inner wall of the annular groove 221 is 0.1-0.3 mm. By setting according to the above numerical range, a design gap is reserved, which can achieve a good dustproof effect and also ensure that the product can be assembled even under the condition of dimensional tolerance due to the manufacturing process.

[0064] It is understood that the distance between the insertion part 130 and the inner wall of the annular groove 221 includes: the minimum distance a between the bottom of the annular groove 221 and the insertion part 130, the minimum distance b between the inner side wall 222 and the insertion part 130, and the minimum distance c between the outer side wall 223 and the insertion part 130.

[0065] Optionally, the minimum distance a between the bottom of the annular groove 221 and the insertion part 130 is 0.3 mm, the minimum distance b between the inner sidewall 222 and the insertion part 130 is 0.3 mm, and the minimum distance c between the outer sidewall 223 and the insertion part 130 is 0.1 mm.

[0066] In some embodiments of this application, as shown in FIG5, the distance d between the end of the inner sidewall 222 near the back plate 100 and the bottom of the annular groove 221 is 4.2mm, the thickness of the back plate 100 is 0.5mm, and the height e of the insertion part 130 (back plate retainer) is 3.9mm. With the above values ​​set, the rigidity of the insertion part 130 is sufficient and it is not easy to break, making the connection between the back plate 100 and the frame 200 more reliable.

[0067] In some embodiments of this application, as shown in FIG5, the outer side wall 223 (outer side retaining rib) is provided with a first chamfer 2232 at the opening of the annular groove 221; the inner side wall 222 (inner side retaining rib) is provided with a second chamfer 2221 at the opening of the annular groove 221. The chamfers guide the assembly of the back plate 100, making the assembly of the frame 200 and the back plate 100 smoother. Optionally, the dimensions of the first chamfer 2232 can be C0.8×0.3mm; the dimensions of the second chamfer 2221 can be C0.3mm.

[0068] In some embodiments of this application, as shown in FIG4, the end of the outer sidewall 223 away from the display screen 300 is flush with the side of the support portion 120 away from the display screen 300. The COF (Chip on Film) of the display screen 300 is arranged along the outer side of the outer sidewall 223 and the side of the back plate 100 away from the display screen 300, passing through the junction of the end of the outer sidewall 223 away from the display screen 300 and the side of the support portion 120 away from the display screen 300. The flush arrangement of the two can make the transition at the junction smoother and avoid damage to the COF (not shown in the figure).

[0069] In some embodiments of this application, as shown in Figures 6 to 9, Figure 6 is an exploded structural diagram of the back plate 100 and the frame 200 in an embodiment of this application, Figure 7 is an assembly diagram of the back plate 100 and the frame 200 in an embodiment of this application, Figure 8 is a partially enlarged diagram of point Q in Figure 7, and Figure 9 is a CC cross-sectional view of Figure 1. The insertion part 130 is provided with multiple snap-fit ​​protrusions 136 on the side facing the outer wall 223; the outer wall 223 is provided with multiple snap-fit ​​openings 2233 at positions corresponding to the multiple snap-fit ​​protrusions 136; the multiple snap-fit ​​openings 2233 are snapped and fixed one-to-one with the multiple snap-fit ​​protrusions 136, fixing the back plate 100 and the frame 200 together. The snap-fit ​​connection method is reliable and easy to install.

[0070] In some embodiments of this application, as shown in Figures 9 and 10 (Figure 10 is a partially enlarged view of point O in Figure 9), the protrusion height h of the snap-fit ​​protrusion 136 is 0.3-0.5 mm. Setting the height within this range ensures reliable engagement, avoids disengagement due to excessively low protrusion height, and prevents wasted space due to excessively high protrusion height. The snap-fit ​​protrusion 136 can be formed using a stamping process, resulting in a smooth, complete surface without stamping notches and high part precision.

[0071] As shown in Figures 9 and 10, the end of the buckle protrusion 136 away from the display screen 300 can abut against the edge of the buckle opening 2233 away from the display screen 300, so that the back plate 100 cannot move away from the display screen 300 relative to the frame 200; the end of the inner sidewall 222 away from the display screen 300 abuts against the back plate 100, so that the back plate 100 cannot move towards the display screen 300 relative to the frame 200, so that the frame 200 and the back plate 100 are reliably fixed together.

[0072] In some embodiments of this application, as shown in FIG9, the display screen 300 and the first top wall 210 of the frame 200 are sealed by a sealing adhesive 400. The sealing adhesive 400 is located between the edge of the display screen 300 and the first top wall 210 of the frame 200, and is arranged in a ring shape so that the display screen 300 and the first top wall 210 are spaced apart. The sealing adhesive 400 has the effects of bonding, fixing and sealing, ensuring the airtightness while realizing the fixed connection between the display screen 300 and the frame 200; the spaced arrangement of the display screen 300 and the first top wall 210 can prevent collision between the two and help protect the display screen 300.

[0073] In some embodiments of this application, the screen sealing adhesive 400 is a double-sided polyurethane foam tape, comprising a first black polyacrylic adhesive layer, a first black polyester film layer (PET film), a polyurethane foam layer, a second black polyester film layer (PET film), and a second black polyacrylic adhesive layer stacked sequentially, so that the screen sealing adhesive 400 has excellent all-round light blocking performance and stable and reliable adhesion performance.

[0074] Optionally, both the first and second black polyacrylic adhesive layers (skin layers) are high-performance black polyacrylic adhesives with high viscosity and relative softness. When in contact with the display screen 300, they provide elastic contact, preventing pressure on the display screen 300 and ensuring its flatness, thus improving display performance. The polyurethane foam layer can be ultra-soft polyurethane foam. Ultra-soft polyurethane foam is a material with extremely high softness and elasticity, primarily made of polyurethane. It possesses advantages such as high softness, good elasticity, and strong durability, providing protection for the display screen 300.

[0075] In some embodiments of this application, as shown in FIG9, the display module further includes a front frame 500; the front frame 500 includes a second top wall 510 and a second side wall 520 connected together; the second side wall 520 is arranged around the outer side of the frame 200, the back plate 100 and the display screen 300; the second top wall 510 is located at the end of the second side wall 520 near the display screen 300, is disposed on the side of the display screen 300 away from the back plate 100, and overlaps with the edge of the display screen 300; an elastic sealing layer 600 is provided between the second top wall 510 and the edge of the display screen 300. The front frame 500 can fix the display screen 300 and protect it, and the elastic sealing layer 600 can both seal and fix it. Because it is elastic, it has elastic contact with the display screen 300 rather than rigid contact, which is beneficial to protecting the display screen 300.

[0076] Optionally, the elastic sealing layer 600 can be foam, which is only in contact with the display screen 300 and does not require adhesive fixation. The sealing is achieved by the compression of the elastic sealing layer 600.

[0077] In some embodiments of this application, as shown in FIG9, the display module further includes an optical film layer 700; the optical film layer 700 is disposed between the back plate 100 and the first top wall 210, and its edge is supported by the support portion 120; the end of the first top wall 210 away from the first side wall 220 extends towards the optical film layer 700 to form an extension portion 211, and the extension portion 211 is spaced apart from the optical film layer 700. The optical film layer 700 can play the role of brightening and uniform light, which is beneficial to improving the display effect. The extension portion 211 has a limiting function on the optical film layer 700, restricting the movement of the optical film layer 700 in the thickness direction of the display module, and can prevent the optical film layer 700 from undergoing large displacement.

[0078] Optionally, the optical film layer 700 may include a composite film 710 and a diffuser plate 720 stacked together; the diffuser plate 720 is disposed between the back plate 100 and the first top wall 210, and its edge is supported by the support portion 120; the composite film 710 is located between the diffuser plate 720 and the first top wall 210. The composite film 710 has a brightening effect, and the diffuser plate 720 has a light-uniforming effect. The composite film 710 may include at least one of a prism sheet and a brightening film, and the brightening film may include a DEBF film (Dual Brightness Enhancement Film, reflective brightening film), etc.

[0079] In some embodiments of this application, the distance between the extension 211 and the optical film 700 is 0.3-0.5 mm. This facilitates installation while effectively limiting the position of the optical film 700.

[0080] In some embodiments of this application, as shown in FIG9, a fixing foam 800 may be provided between the optical film layer 700 and the first top wall 210. The fixing foam 800 acts as a pressure sheet to further fix the optical film layer 700. The fixing foam 800 may be disposed close to the extension 211 for easy positioning.

[0081] In some embodiments of this application, as shown in FIG9, the display module further includes a reflective sheet 730 (reflective paper). The reflective sheet 730 is disposed between the optical film layer 700 and the back plate 100, with its edge located on the support portion 120 of the back plate 100. The reflective sheet 730 has the function of changing the light path. Referring back to FIG3, a light source 740 may be provided between the back plate 100 and the reflective sheet 730. The light source 740 has a plurality of lamp beads 741. The reflective sheet 730 has openings 731 corresponding one-to-one with the plurality of lamp beads 741, so that the lamp beads 741 are exposed to the openings 731. The light emitted by the lamp beads 741 is directed to the display screen 300 through the optical film layer 700. Optionally, the light source 740 may be a light strip.

[0082] In some embodiments of this application, as shown in Figures 11 to 13, Figure 11 is a DD sectional view of Figure 1, Figure 12 is a partially enlarged exploded view of the back plate 100 and the frame 200 in an embodiment of this application, and Figure 13 is a front view of the assembled structure shown in Figure 12. A first through hole 521 is provided on the second sidewall 520; a second through hole 2231 is provided on the outer sidewall 223 at a position corresponding to the first through hole 521; a third through hole 133 is provided on the insertion part 130 at a position corresponding to the second through hole 2231; a fastener 900 passes sequentially through the first through hole 521, the second through hole 2231, and the third through hole 133 to fix the front frame 500, the frame 200, and the back plate 100 together. Using the fastener 900 to fix the front frame 500, the frame 200, and the back plate 100 together provides a reliable fixation method and allows for detachable connection, facilitating testing and maintenance. Optionally, the fastener 900 can be a screw.

[0083] As shown in Figures 11 to 13, the inner wall 222 is recessed inward to form a clearance space 2222 opposite to the second through hole 2231, providing installation space for the fastener 900.

[0084] As shown in Figure 11, the insertion part 130 has a third through hole 133 that can protrude inward to form a reinforcing part 135, so as to enhance rigidity and prevent breakage due to the thinness of the insertion part 130.

[0085] In some embodiments of this application, as shown in Figures 6, 12 to 14, Figure 14 is a front view of the back plate 100 in Figure 13. The insertion part 130 protrudes outward from the position where the third through hole 133 is provided, forming a protruding structure 131. Two adjacent protruding structures 131 are connected by a connecting section 132. The protruding structure 131 includes a straight section 1311 and inclined sections 1312 located on both sides of the straight section 1311. The straight section 1311 is connected to the connecting section 132 through the inclined section 1312. The third through hole 133 is provided on the straight section 1311. The free end of the insertion part 130 is provided with a plurality of spaced notches 134. Each notch 134 extends from the connecting section 132 through the inclined section 1312 to the straight section 1311. The depth g of the notch 134 is less than or equal to 0.5 mm. The shapes of the inner sidewall 222 and the outer sidewall 223 are adapted to the shape of the insertion part 130. The fastener 900 has a certain length. If the protruding structure 131 is not provided, the fastener 900 will extend into the module and may hit structures such as the optical film layer 700. The fastener 900 is positioned to protrude outward to form the protruding structure 131, which provides space for the fastener 900 and can prevent the above-mentioned problem from occurring and avoid damaging other structures.

[0086] As shown in Figure 14, each notch 134 extends from the connecting section 132 through the inclined section 1312 to the straight section 1311. That is, the notch 134 passes through the junction of the straight section 1311 and the inclined section 1312, as well as the junction of the inclined section 1312 and the connecting section 132, making the transition at the bend more natural. At the same time, the depth of the notch 134 is less than or equal to 0.5mm, which allows the insertion part 130 to have a small gap with the bottom of the annular groove 221, thus playing a certain role in dust prevention.

[0087] As shown in Figure 15, which is an exploded structural diagram of the frame 200 and the back plate 100 in another embodiment of this application, the frame 200 shown in Figure 6 is an integral design, while the frame 200 shown in Figure 15 is a split design. The frame 200 includes four sub-segments 201. During the assembly process, each sub-segment 201 can be installed onto the back plate 100. The four sub-segments 201 are connected end to end to form a rectangular ring. The split design facilitates installation.

[0088] An embodiment of the second aspect of this application provides a display device including a display module according to any embodiment of the first aspect.

[0089] The display device of this application embodiment includes a display module according to any embodiment of the first aspect. An annular seal is formed at the connection between the back plate 100 and the frame 200 of the display module, and an annular seal is formed at the connection between the display screen 300 and the frame 200. The two annular seals block the path for dust to enter the interior of the display module, so that dust cannot enter the containment space enclosed by the back plate 100, the frame 200 and the display screen 300 through the gap between the back plate 100 and the frame 200 and the gap between the display screen 300 and the frame 200. This improves the dustproof effect of the display module, making the display module suitable for outdoor and other dusty application scenarios, thereby improving the dustproof effect of the display device and expanding the application range of the display device.

[0090] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A display module, characterized in that, include: A back panel, a frame, and a display screen; the frame, disposed on one side of the back panel, includes a first top wall and a first side wall connected together; both the first top wall and the first side wall are annular, the first side wall surrounds the edge of the back panel, and the first top wall is located on the side of the first side wall away from the back panel; the side of the first side wall facing the back panel has an annular groove, the annular groove dividing the first side wall into an inner side wall located inside the annular groove and an outer side wall located outside the annular groove; the back panel includes a main body, a support portion surrounding the main body, and an insertion portion surrounding the support portion; the insertion portion extends from the support portion toward the frame and inserts into the annular groove, so that the end of the inner side wall near the back panel is in close contact with the support portion; the display screen is disposed on the side of the first top wall of the frame away from the back panel and is sealed to the first top wall in its circumferential direction.

2. The display module according to claim 1, characterized in that, The width of the annular groove is greater than or equal to 0.9 mm; and / or the distance between the insertion part and the inner wall of the annular groove is 0.1-0.3 mm.

3. The display module according to claim 1, characterized in that, The end of the outer wall away from the display screen is flush with the side of the support portion away from the display screen.

4. The display module according to claim 1, characterized in that, The insertion part has multiple buckle protrusions on the side facing the outer wall; the outer wall has multiple buckle openings at positions corresponding to the multiple buckle protrusions; the multiple buckle openings are engaged and fixed in a one-to-one manner with the multiple buckle protrusions.

5. The display module according to claim 4, characterized in that, The protrusion height of the buckle protrusion is 0.3-0.5mm.

6. The display module according to claim 1, characterized in that, The display screen and the first top wall of the frame are sealed with a screen sealing adhesive; the screen sealing adhesive is located between the edge of the display screen and the first top wall of the frame, and is arranged in a ring shape so that the display screen and the first top wall are spaced apart.

7. The display module according to claim 6, characterized in that, The sealing adhesive is a double-sided polyurethane foam tape, comprising a first black polyacrylic adhesive layer, a first black polyester film layer, a polyurethane foam layer, a second black polyester film layer, and a second black polyacrylic adhesive layer stacked in sequence.

8. The display module according to any one of claims 1-7, characterized in that, The display module further includes: a front frame; the front frame includes a second top wall and a second side wall connected together; the second side wall is arranged around the outside of the frame, the back plate and the display screen; the second top wall is located at one end of the second side wall near the display screen, on the side of the display screen away from the back plate, and overlaps with the edge of the display screen; an elastic sealing layer is provided between the second top wall and the edge of the display screen.

9. The display module according to claim 8, characterized in that, The second sidewall is provided with a first through hole; the outer sidewall is provided with a second through hole at a position corresponding to the first through hole; the insertion part is provided with a third through hole at a position corresponding to the second through hole; the fastener passes through the first through hole, the second through hole and the third through hole in sequence to fix the front frame, the rubber frame and the back plate together.

10. The display module according to claim 9, characterized in that, The insertion part protrudes outward from the position where the third through hole is located, forming a protruding structure. Two adjacent protruding structures are connected by a connecting section. The protruding structure includes a straight section and inclined sections located on both sides of the straight section. The straight section is connected to the connecting section through the inclined sections. The third through hole is provided on the straight section. The free end of the insertion part has a plurality of spaced notches, each of which extends from the connecting section through the inclined section to the straight section. The depth of the notch is less than or equal to 0.5 mm. The shapes of the inner sidewall and the outer sidewall are adapted to the shape of the insertion part.

11. The display module according to claim 1, characterized in that, The display module further includes: an optical film layer; the optical film layer is disposed between the back plate and the first top wall, and its edge is supported by the support portion; the end of the first top wall away from the first side wall extends toward the optical film layer to form an extension portion, and the extension portion is spaced apart from the optical film layer.

12. The display module according to claim 11, characterized in that, The distance between the extension and the optical film is 0.3-0.5 mm.

13. The display module according to claim 1, characterized in that, The outer sidewall has a first chamfer at the opening of the annular groove; the inner sidewall has a second chamfer at the opening of the annular groove.

14. A display device, characterized in that, Includes the display module as described in any one of claims 1-13.

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