Backlight module and display device

Abstract

This disclosure provides a backlight module and a display device, wherein the backlight module includes: a top cover; a rear shell located on one side of the top cover, the rear shell having an annular sidewall and a bottom plate connected to each other, the annular sidewall having a support structure protruding from the upper surface of the annular sidewall and a first groove recessed in the upper surface, the support structure being disposed adjacent to the first groove; and a fixing adhesive located between the upper surface of the annular sidewall and the top cover, the fixing adhesive being bonded to the upper surface of the annular sidewall and the top cover respectively, the fixing adhesive being at least partially located within the first groove. This disclosure can reduce the risk of fixing adhesive overflowing from the upper surface of the annular sidewall of the rear shell, reduce the proportion of backlight module rework and cleaning of residual fixing adhesive, and improve the yield of the backlight module.

Description

Technical Field

[0001] This disclosure relates to the field of displays, and more specifically, to a backlight module and a display device. Background Technology

[0002] In related technologies, a display device may include a backlight module and a display module, with the backlight module providing a light source for the display module. The backlight module typically has a support structure on the upper surface of the annular sidewall of the rear housing to support the top cover. However, the presence of the support structure reduces the application width of the adhesive on the upper surface of the annular sidewall of the rear housing, causing the adhesive to easily overflow at the support structure.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] In view of this, the present disclosure provides a backlight module and a display device to at least solve the problem of adhesive overflow in existing backlight modules.

[0005] In one aspect, embodiments of this disclosure provide a backlight module, comprising: a top cover; a back cover located on one side of the top cover, the back cover having an annular sidewall and a bottom plate connected to each other, the annular sidewall having a support structure protruding from the upper surface of the annular sidewall and a first groove recessed in the upper surface, the support structure being disposed adjacent to the first groove; and a fixing adhesive located between the upper surface of the annular sidewall and the top cover, the fixing adhesive being bonded to the upper surface of the annular sidewall and the top cover respectively, the fixing adhesive being at least partially located within the first groove.

[0006] On the other hand, embodiments of this disclosure also provide a display device including the backlight module described above.

[0007] Compared with the prior art, this disclosure has at least the following technical effects:

[0008] The backlight module and display device disclosed herein, by providing a support structure protruding and a first groove recessed on the upper surface of the annular sidewall of the rear housing, and by making the support structure adjacent to the first groove, ensures that the fixing adhesive disposed between the upper surface of the annular sidewall of the rear housing and the top cover for bonding the rear housing and the top cover is at least partially located within the first groove. This allows the reduced coating width of the fixing adhesive due to the presence of the support structure to be compensated by the first groove adjacent to the support structure. This allows the fixing adhesive near the support structure to flow into and be contained by the first groove, thereby reducing the risk of fixing adhesive overflowing from the upper surface of the annular sidewall of the rear housing, reducing the proportion of backlight module rework and cleaning of residual fixing adhesive, and improving the yield of the backlight module. Attached Figure Description

[0009] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0010] Figure 1 This is a schematic diagram of the three-dimensional structure of a backlight module in related technologies;

[0011] Figure 2 yes Figure 1 A magnified view of a portion of region A in the middle;

[0012] Figure 3 yes Figure 1 Top view of the backlight module;

[0013] Figure 4 yes Figure 3 A magnified view of a portion of region B in the middle;

[0014] Figure 5 yes Figure 1 An exploded structural diagram of a backlight module;

[0015] Figure 6 yes Figure 5 A magnified view of a portion of region C in the middle;

[0016] Figure 7 This is an exploded structural diagram of a backlight module provided in an embodiment of this disclosure;

[0017] Figure 8 yes Figure 7 A top view of the assembled backlight module, excluding the top cover.

[0018] Figure 9 yes Figure 7 A top view of the assembled backlight module, excluding the top cover and fixing adhesive.

[0019] Figure 10 yes Figure 9 A magnified view of a portion of region E in the middle;

[0020] Figure 11 yes Figure 9 A schematic diagram of a three-dimensional structure of a backlight module;

[0021] Figure 12 yes Figure 11 A magnified view of a portion of region F in the middle;

[0022] Figure 13 yes Figure 9 Another 3D structural diagram of the backlight module;

[0023] Figure 14 yes Figure 13 A magnified view of a portion of region G in the middle;

[0024] Figure 15 yes Figure 8 A magnified view of a portion of region D in the middle;

[0025] Figure 16 yes Figure 13 A magnified view of a portion of region H in the middle;

[0026] Figure 17 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure.

[0027] Figure label:

[0028] 100 Backlight Modules

[0029] 110 Top Cover

[0030] 120 rear shell

[0031] 121 Annular sidewall

[0032] 1211 Top surface

[0033] 1212 Supporting Structure

[0034] 1213 First Groove

[0035] 1214 Second Groove

[0036] 1215 Second snap-fit ​​structure

[0037] 122 base plate

[0038] 130 Fixative Adhesive

[0039] 140 Medium Sheet Metal

[0040] 141 Protruding ears

[0041] 142 First snap-fit ​​structure

[0042] 200 display devices Detailed Implementation

[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0044] The use of terms such as "first," "second," and similar terms in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. Furthermore, in the description of this disclosure, the terms "upper," "lower," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. These are for ease of description only and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0045] It should be noted that, unless otherwise specified, the embodiments of this disclosure and the features in different embodiments can be combined with each other.

[0046] Among related technologies, direct-lit backlight modules using Mini-LED light sources achieve the thinness, high image quality, and low power consumption of LCD (Liquid Crystal Display) panels, while their performance level is close to that of OLED (Organic Light Emitting Diode) display panels, and they outperform OLED in terms of brightness and color rendering. Furthermore, Mini-LED backlighting can be combined with precise local dimming technology to control the switching and brightness adjustment of corresponding backlight areas in real time, resulting in high contrast, more vibrant colors, and a high dynamic range (HDR) screen effect. However, there is still room for improvement in Mini-LED technology at the process and design levels.

[0047] Specifically, the display device may include a direct-lit backlight module with a Mini-LED light source and a display module. Further, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the backlight module 100' may include a back cover and a top cover. A support structure 1212' is typically provided on the upper surface 1211' of the annular sidewall 121' of the back cover, which supports the top cover. A fixing adhesive is also provided between the upper surface 1211' of the annular sidewall 121' of the back cover and the top cover, which is used to bond the back cover and the top cover. However, the width available for the fixing adhesive to be applied on the upper surface 1211' of the annular sidewall 121' of the back cover is reduced due to the presence of the support structure 1212', thus causing the fixing adhesive to easily overflow at the support structure 1212'. After the adhesive overflows, the backlight module 100' needs to be reworked to clean the adhesive and reapply it. However, since the adhesive coating area on the upper surface 1211' of the annular sidewall 121' of the back cover is large, the residual adhesive is difficult to clean during rework, resulting in a decrease in the yield of the backlight module.

[0048] Secondly, in the related technology, the support structure 1212' is located on the outer edge of the upper surface 1211' of the annular sidewall 121' of the rear shell, which increases the size of the backlight module 100' and is not conducive to the miniaturization of the display device containing the backlight module 100'.

[0049] Again, such as Figure 5 As shown, the backlight module 100' may also include a middle sheet metal 140', at least a portion of which is disposed between the upper surface 1211' of the annular sidewall 121' of the rear shell and the top cover, resulting in a larger thickness of the backlight module 100', which is not conducive to the thinning of the display device containing the backlight module 100'.

[0050] Finally, as Figure 5 and Figure 6 As shown, the middle sheet metal 140' has a first snap-fit ​​structure 142', and the outer surface of the annular sidewall 121' of the rear shell has a second snap-fit ​​structure 1215'. The middle sheet metal 140' and the rear shell are snapped together by the first snap-fit ​​structure 142' and the second snap-fit ​​structure 1215'. Furthermore, the backlight module 100' may also include a fixing tape 150', and the middle sheet metal 140' and the rear shell are also bonded together by the fixing tape 150'. However, due to manufacturing errors in the first snap-fit ​​structure 142' and the second snap-fit ​​structure 1215', as well as the failure of the fixing tape 150' to adhere, in motion scenarios such as automotive displays, the middle sheet metal 140' and the rear shell may loosen due to vibration, leading to wear between them. Meanwhile, the first snap-fit ​​structure 142' of the middle sheet metal 140' is set on the outer surface of the annular side wall 121' of the rear shell, which increases the size of the backlight module 100' and is not conducive to the miniaturization of the display device containing the backlight module 100'.

[0051] In view of this, on the one hand, such as Figures 7 to 12 As shown, an embodiment of this disclosure provides a backlight module 100. The backlight module 100 includes: a top cover 110, a back cover 120, and a fixing adhesive 130.

[0052] The top cover 110 encapsulates the backlight module 100 and protects its lower structure. The back cover 120 houses the light source and optical films of the backlight module 100. Adhesive 130 is used to bond the top cover 110 and the back cover 120 together.

[0053] Specifically, the rear shell 120 is located on one side of the upper cover 110. The rear shell 120 has an annular sidewall 121 and a bottom plate 122 connected to each other. The annular sidewall 121 has a support structure 1212 protruding from the upper surface 1211 of the annular sidewall 121 and a first groove 1213 recessed from the upper surface 1211. The support structure 1212 and the first groove 1213 are arranged adjacent to each other. Further, the support structure 1212 of the rear shell 120 is used to support the upper cover 110, leaving space for the fixing adhesive 130 to bond the rear shell 120 and the upper cover 110.

[0054] Specifically, the fixing adhesive 130 is located between the upper surface 1211 of the annular sidewall 121 and the upper cover 110. The fixing adhesive 130 is bonded to the upper surface 1211 of the annular sidewall 121 and the upper cover 110 respectively. The fixing adhesive 130 is at least partially located in the first groove 1213.

[0055] In this embodiment, a support structure 1212 protrudes from the upper surface 1211 of the annular sidewall 121 of the rear shell 120 and a first groove 1213 is recessed therein. The support structure 1212 and the first groove 1213 are arranged adjacent to each other. This ensures that the adhesive 130, which is disposed between the upper surface 1211 of the annular sidewall 121 of the rear shell 120 and the upper cover 110 and is used to bond the rear shell 120 and the upper cover 110, is at least partially located within the first groove 1213. Furthermore, the presence of the support structure 1212 ensures that... The reduced coating width of the fixing adhesive 130 can be compensated by the first groove 1213 adjacent to the support structure 1212, so that the fixing adhesive 130 near the support structure 1212 can flow to the first groove 1213 and be contained by the first groove 1213, thereby reducing the risk of fixing adhesive 130 overflowing onto the upper surface 1211 of the annular sidewall 121 of the back cover 120, reducing the proportion of backlight module 100 requiring rework and cleaning of residual fixing adhesive 130, and improving the yield of backlight module 100.

[0056] In some embodiments, continue to refer to Figure 9 and Figure 11The upper surface 1211 of the annular sidewall 121 is provided with at least one first groove 1213 adjacent to the support structure 1212, so as to reduce the risk of adhesive 130 overflowing from the support structure 1212 with the first groove 1213 onto the upper surface 1211 of the annular sidewall 121 of the shell 120. Optionally, the number of first grooves 1213 is the same as that of the support structures 1212, and each first groove 1213 is adjacent to the position of a support structure 1212, so as to reduce the risk of adhesive 130 overflowing from each support structure 1212.

[0057] In some embodiments, continue to refer to Figures 9 to 12 The first groove 1213 and the support structure 1212 are arranged adjacent to each other along the width direction of the upper surface 1211 of the annular sidewall 121, and the support structure 1212 is located inside the upper surface 1211 relative to the first groove 1213. Specifically, in this embodiment, both the support structure 1212 and the first groove 1213 are strip-shaped. The strip-shaped support structure 1212 can provide sufficient support for the upper cover 110 on the upper surface 1211 of the narrow rear shell 120 annular sidewall 121. The strip-shaped first groove 1213 can match the support structure 1212, so that while the upper surface 1211 of the annular sidewall 121 is being prepared, it can provide a space equal to the coating space of the fixing adhesive 130 occupied by the support structure 1212 to accommodate the fixing adhesive 130. Furthermore, in this embodiment, the support structure 1212 is located inside the upper surface 1211 compared to the first groove 1213. Compared to the outer edge of the upper surface 1211 of the annular sidewall 121 of the rear shell 120 designed in the related art, the size of the rear shell 120 can be reduced, thereby reducing the size of the backlight module 100, which is beneficial for miniaturization of the backlight module 100.

[0058] In other embodiments, the support structure 1212 may be located outside the upper surface 1211 relative to the first groove 1213, and the projection of the support structure 1212 onto the upper surface 1211 of the annular sidewall 121 of the rear shell 120 is included in the upper surface 1211. Specifically, when the fixing adhesive 130 is applied, due to the obstruction of the support structure 1212 protruding from the upper surface 1211 of the annular sidewall 121, the fixing adhesive 130 is unlikely to overflow from the upper surface 1211 and instead flow towards the first groove 1213 near the inner side, thereby reducing the risk of the fixing adhesive 130 overflowing. At the same time, the fact that the projection of the support structure 1212 onto the upper surface 1211 of the annular sidewall 121 of the rear shell 120 is included in the upper surface 1211 can also reduce the size of the rear shell 120, thereby reducing the size of the backlight module 100, or providing space for other structures of the backlight module 100.

[0059] In some embodiments, continue to refer to Figures 9 to 12Both the support structure 1212 and the first groove 1213 are arranged along the extending direction of the upper surface 1211 of the annular sidewall 121, and the edges of the first groove 1213 and the support structure 1212 that are close to each other at least partially overlap. Specifically, the extending direction of the upper surface 1211 of the annular sidewall 121 is annular, and both the support structure 1212 and the first groove 1213 are arranged along the direction of this annularity. In conjunction with the aforementioned embodiment, both the support structure 1212 and the first groove 1213 are strip-shaped. The above-mentioned arrangement in this embodiment can facilitate the fabrication of the support structure 1212 and the first groove 1213 on the upper surface 1211 of the annular sidewall 121. Meanwhile, the edges of the first groove 1213 and the support structure 1212 that are close to each other at least partially overlap, which makes the first groove 1213 and the support structure 1212 as close as possible in this embodiment. This makes it easier for the fixing adhesive 130 to flow into the first groove 1213 when the fixing adhesive 130 is applied because the application width at the support structure 1212 is narrower, further reducing the risk of the fixing adhesive 130 overflowing.

[0060] In some embodiments, continue to refer to Figure 10 and Figure 12 Along the extending direction of the upper surface 1211 of the annular sidewall 121, the length of the first groove 1213 is greater than or equal to the length of the support structure 1212. Specifically, the above arrangement allows the volume of the first groove 1213 to be greater than the volume of the support structure 1212, thereby providing sufficient space in the first groove 1213 to accommodate the adhesive 130 squeezed out due to the presence of the support structure 1212. This ensures that the squeezed adhesive 130 can completely enter the first groove 1213, further reducing the risk of adhesive 130 overflowing.

[0061] In some embodiments, the depth of the first groove 1213 recessed in the upper surface 1211 is greater than or equal to the height of the support structure 1212 protruding from the upper surface 1211. Specifically, the above arrangement allows the volume of the first groove 1213 to be greater than the volume of the support structure 1212, thereby providing sufficient space in the first groove 1213 to accommodate the adhesive 130 squeezed out due to the presence of the support structure 1212. This ensures that the squeezed adhesive 130 can completely enter the first groove 1213, further reducing the risk of adhesive 130 overflowing.

[0062] In some embodiments, the support structure 1212 and the first groove 1213 are evenly spaced along the extending direction of the upper surface 1211 of the annular sidewall 121. This arrangement in this embodiment allows the support structure 1212 to provide uniform support to the upper cover 110 and reduces the risk of adhesive 130 overflowing at each support structure 1212.

[0063] In some embodiments, such as Figure 13and Figure 14 As shown, the backlight module 100 also includes a middle sheet metal 140. The middle sheet metal 140 is a hollow annular structure. The annular sidewall 121 of the rear shell 120 and the bottom plate 122 form an accommodating space, and the middle sheet metal 140 is located inside the accommodating space and fixed to the annular sidewall 121. Specifically, the accommodating space is used to accommodate components such as the light source, optical film, frame, and buffer. The hollow annular structure of the middle sheet metal 140 is used to allow light emitted from the light source to pass through the optical film and then exit from the hollow annular structure of the middle sheet metal 140. In this embodiment, the middle sheet metal 140 is fixed to the annular sidewall 121 and located inside the accommodating space. Compared to the related art, where the middle sheet metal 140 is at least partially disposed between the upper surface 1211 of the annular sidewall 121 of the rear shell 120 and the upper cover 110, the middle sheet metal 140 in this embodiment can reduce the thickness of the backlight module 100, which is beneficial for the thinning of the backlight module 100. In addition, since the middle sheet metal 140 in this embodiment is located inside the accommodating space, compared to the related art where the middle sheet metal 140 is at least partially disposed outside the rear shell 120, the size of the backlight module 100 can also be reduced, which is beneficial for the miniaturization of the backlight module 100 or provides space for other structures of the backlight module 100.

[0064] In some embodiments, such as Figure 13 and Figure 14 As shown, the annular sheet metal 140 has at least one outwardly protruding lug 141; the annular sidewall 121 also has a second groove 1214 whose position matches the lug 141, and the second groove 1214 is simultaneously recessed in the upper surface 1211 and the inner surface of the annular sidewall 121; the lug 141 is located inside the second groove 1214. Specifically, the lug 141 of the sheet metal 140 is at least used to fix the sheet metal 140 and the annular sidewall 121 of the rear shell 120. In this embodiment, by providing the second groove 1214 simultaneously recessed in the upper surface 1211 and the inner surface of the annular sidewall 121 to accommodate the lug 141, the thickness of the backlight module 100 can be avoided due to the presence of the sheet metal 140 while fixing the sheet metal 140 and the annular sidewall 121 of the rear shell 120, thereby reducing the thickness of the backlight module 100.

[0065] In some embodiments, such as Figure 14 and Figure 15As shown, the lug 141 is located between the fixing adhesive 130 and the upper surface 1211 of the annular sidewall 121, and the lug 141 and the annular sidewall 121 are bonded together at least by the fixing adhesive 130. Specifically, the middle sheet metal 140 is positioned and installed on the rear shell 120 by the lug 141, and is bonded to the rear shell 120 by the fixing adhesive 130, specifically bonded to the second groove 1214 of the annular sidewall 121 of the rear shell 120. During the installation of the backlight module 100, the rear shell 120 is first set up, then the middle sheet metal 140 is positioned and installed on the rear shell 120 by the lug 141 and the second groove 1214 of the rear shell 120, and then the fixing adhesive 130 is applied to the upper surface 1211 of the annular sidewall 121 of the rear shell 120 to achieve the bonding between the middle sheet metal 140 and the rear shell 120. In this embodiment, compared to the prior art where the annular sidewall 121 of the middle sheet metal 140 and the rear shell 120 are assembled using buckles and fixing tapes, the installation strength of the middle sheet metal 140 and the rear shell 120 can be improved. This avoids the middle sheet metal 140 and the rear shell 120 from becoming loose due to vibration in motion scenarios such as vehicle displays. This also avoids wear and powder generation between the middle sheet metal 140 and the rear shell 120, thus preventing the optical film from being scratched by powder entering the optical film inside the rear shell 120 and improving the yield of the backlight module 100.

[0066] In some embodiments, along the extending direction of the upper surface 1211 of the annular sidewall 121, the length of the second groove 1214 is greater than the length of the lug 141, so that the lug 141 can be completely accommodated inside the second groove 1214, and facilitates the assembly of the sheet metal 140. Meanwhile, since the lug 141 and the annular sidewall 121 are bonded at least by adhesive 130, the structural redundancy created by the length of the second groove 1214 being greater than the length of the lug 141 will not cause the sheet metal 140 and the rear shell 120 to loosen due to vibration in motion scenarios such as in-vehicle displays.

[0067] In some embodiments, along a direction perpendicular to the upper surface 1211 of the annular sidewall 121, the bonding surface between the lug 141 and the fixing adhesive 130 is flush with or lower than the upper surface 1211. This configuration in this embodiment allows for a reduction in the thickness of the backlight module 100 compared to related technologies where the middle sheet metal 140 is at least partially disposed between the upper surface 1211 of the annular sidewall 121 of the rear shell 120 and the upper cover 110. This facilitates a thinner and lighter backlight module 100. Furthermore, since the fixing adhesive 130 is applied to the upper surface 1211 of the annular sidewall 121, even if the bonding surface between the lug 141 and the fixing adhesive 130 is lower than the upper surface 1211, this portion will be filled and eventually cured by the fixing adhesive 130, without affecting the adhesion between the fixing adhesive 130 and the upper cover 110, or the bonding strength between the rear shell 120 and the upper cover 110.

[0068] In some embodiments, along a direction perpendicular to the upper surface 1211 of the annular sidewall 121, the distance between the adhesive surface of the lug 141 and the upper surface 1211 is less than or equal to 0.1 mm. Specifically, the distance between the adhesive surface of the lug 141 and the upper surface 1211 can be any value among 0 mm, 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, or 0.1 mm, and this disclosure does not impose any limitation on this. The aforementioned arrangement of the adhesive surface of the lug 141 being lower than the upper surface 1211 in this embodiment can prevent the adhesive surface of the lug 141 from being too far below the upper surface 1211. This avoids the adhesive 130 sinking into the second groove 1214 on the upper surface 1211 of the annular sidewall 121 due to the excessive distance between the adhesive surface of the lug 141 and the upper surface 1211, thus preventing the adhesive 130 from being lower at this location than at other locations and causing a missing bond between the adhesive 130 and the upper cover 110 at the second groove 1214. This improves the bonding strength between the adhesive 130 and the upper cover 110.

[0069] In some embodiments, such as Figure 13 and Figure 16 As shown, the middle sheet metal 140 has a first snap-fit ​​structure 142 on the side near the annular sidewall 121; the inner side of the annular sidewall 121 has a second snap-fit ​​structure 1215; the middle sheet metal 140 and the annular sidewall 121 are snapped together and fixed by the first snap-fit ​​structure 142 and the second snap-fit ​​structure 1215. Specifically, the first snap-fit ​​structure 142 of the middle sheet metal 140 can be a protrusion protruding from the edge of the middle sheet metal 140, and the second snap-fit ​​structure 1215 of the annular sidewall 121 can be a through hole penetrating the upper surface 1211 and the inner side of the annular sidewall 121, thereby achieving snap-fit ​​fixation. In this embodiment, the middle sheet metal 140 and the annular sidewall 121 are snapped together and fixed by the first snap-fit ​​structure 142 and the second snap-fit ​​structure 1215, which can further improve the installation strength of the middle sheet metal 140 and the rear shell 120 when they are bonded together by fixing adhesive 130.

[0070] On the other hand, such as Figure 17 As shown, embodiments of this disclosure also provide a display device 200. The display device 200 includes the backlight module 100 provided in any embodiment of this disclosure. The display device 200 provided in embodiments of this disclosure can be... Figure 12 The vehicle-mounted display device shown can also be any electronic product with display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, medical devices, industrial control equipment, touch interactive terminals, etc. This disclosure does not impose any special limitations on these.

[0071] For details on the specific implementation and technical effects of the display device 200 disclosed herein, please refer to the specific embodiments of the backlight module 100 described above. Repeated descriptions will not be repeated here.

[0072] In summary, the backlight module and display device disclosed herein, by providing a support structure protruding and a first groove recessed on the upper surface of the annular sidewall of the rear housing, and by making the support structure adjacent to the first groove, ensures that the fixing adhesive disposed between the upper surface of the annular sidewall of the rear housing and the top cover for bonding the rear housing and the top cover is at least partially located within the first groove. This allows the reduced coating width of the fixing adhesive due to the presence of the support structure to be compensated by the first groove adjacent to the support structure. Furthermore, the fixing adhesive near the support structure can flow into and be contained within the first groove, thereby reducing the risk of fixing adhesive overflowing from the upper surface of the annular sidewall of the rear housing, reducing the proportion of backlight module rework and cleaning of residual fixing adhesive, and improving the yield of the backlight module.

[0073] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this disclosure and should not be construed as limiting the specific implementation of this disclosure to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this disclosure, and all such modifications and substitutions should be considered within the scope of protection of this disclosure.

Claims

1. A backlight module, characterized in that, include: Top cover; The rear shell is located on one side of the upper cover. The rear shell has an annular sidewall and a bottom plate that are connected to each other. The annular sidewall has a support structure protruding from the upper surface of the annular sidewall and a first groove recessed in the upper surface. The support structure is arranged adjacent to the first groove. A fixing adhesive is located between the upper surface of the annular sidewall and the upper cover, and the fixing adhesive is bonded to the upper surface of the annular sidewall and the upper cover respectively. The fixing adhesive is at least partially located within the first groove.

2. The backlight module according to claim 1, characterized in that, The first groove and the support structure are arranged adjacent to each other along the width direction of the upper surface of the annular sidewall, and the support structure is located inside the upper surface relative to the first groove.

3. The backlight module according to claim 1, characterized in that, The support structure and the first groove are both arranged along the extension direction of the upper surface of the annular sidewall, and the edges of the first groove and the support structure that are close to each other at least partially overlap.

4. The backlight module according to claim 3, characterized in that, Along the extending direction of the upper surface of the annular sidewall, the length of the first groove is greater than or equal to the length of the support structure.

5. The backlight module according to claim 3, characterized in that, The depth of the first groove recessed on the upper surface is greater than or equal to the height of the support structure protruding from the upper surface.

6. The backlight module according to claim 1, characterized in that, Along the extending direction of the upper surface of the annular sidewall, the support structure and the first groove are equally spaced.

7. The backlight module according to claim 1, characterized in that, The backlight module also includes: a middle sheet metal, which is a hollow ring structure; The annular sidewall of the rear shell and the bottom plate form an accommodating space, and the middle sheet metal is located inside the accommodating space and fixed to the annular sidewall.

8. The backlight module according to claim 7, characterized in that, The sheet metal of the annular structure has at least one outwardly protruding lug; the annular sidewall also has a second groove whose position matches the lug, the second groove being recessed into both the upper surface and the inner surface of the annular sidewall; the lug is located inside the second groove.

9. The backlight module according to claim 8, characterized in that, The lug is located between the fixing adhesive and the upper surface of the annular sidewall, and the lug and the annular sidewall are bonded together at least by the fixing adhesive.

10. The backlight module according to claim 9, characterized in that, Along the direction perpendicular to the upper surface of the annular sidewall, the bonding surface between the lug and the fixing adhesive is flush with or lower than the upper surface.

11. The backlight module according to claim 10, characterized in that, Along the direction perpendicular to the upper surface of the annular sidewall, the distance between the bonding surface of the lug and the upper surface is less than or equal to 0.1 mm.

12. The backlight module according to claim 7, characterized in that, The sheet metal has a first snap-fit ​​structure on the side near the annular sidewall; the inner side of the annular sidewall has a second snap-fit ​​structure; the sheet metal and the annular sidewall are snapped together and fixed by the first snap-fit ​​structure and the second snap-fit ​​structure.

13. A display device, characterized in that, Includes the backlight module according to any one of claims 1 to 12.

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