Backlight module and display device

Abstract

The utility model provides a backlight module and a display device.The backlight module comprises a back bottom plate and a back side plate connected to the periphery of the back bottom plate and further comprises a switching mechanism, an inner middle frame, a diffusion plate, a diffusion sheet and a heat conduction layer, the switching mechanism comprises an inner switching piece and a switching plate, the inner switching piece is connected to the back bottom plate, and the switching plate is connected to the inner middle frame; the adapter plate is connected to the inner adapter piece and the back bottom plate, and a light source is arranged on the adapter plate; the inner middle frame is connected to the inner adapter; the diffusion plate is arranged on the inner middle frame; the diffusion sheet layer is stacked on the diffusion plate; the heat conduction layers are arranged on the two side surfaces of the back bottom plate in the thickness direction of the back bottom plate. The backlight module solves the problems that a display device assembled by an existing backlight module is relatively thick and heavy, and the heat dissipation effect of a back plate becomes poor.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] The Mini LED backlight module is a light-emitting component that can be used in display devices. For example, it can be used in computer, television or car displays. It is a light source that can provide a certain brightness and uniformity, so that the display device can display images normally. It is the most important component in the display device.

[0003] The traditional Mini LED backlight module is to stick the light board on the back panel, connect it to the inner middle frame with a clip on the inner side wall of the back panel, and stack the diffusion plate and diffusion sheet in sequence on the top surface of the inner middle frame. When using the above-mentioned Mini LED backlight module to assemble a display device, the middle frame bearing surface is covered with foam double-sided tape all around, and finally the display panel is stuck on the middle frame. Since the back panel needs to be shielded, a shell is required. This will make the assembled display device as a whole thicker. In addition, since the light board generates a lot of heat and has a large heat dissipation requirement, equipping the back panel with a shell will make it difficult for the light board to dissipate heat, and the heat dissipation effect of the back panel will be reduced. Utility Model Content

[0004] The embodiments of the present application provide a backlight module and a display device. By connecting an adapter mechanism to a back panel, an inner middle frame is arranged on an inner adapter, a light source is arranged on the adapter plate, and a heat-conducting layer is provided on both sides of the back panel along its thickness direction. This solves the problem that the display device assembled with the existing backlight module is relatively thick and heavy as a whole, and the heat dissipation effect of the back panel is poor.

[0005] The present invention is implemented as follows: a backlight module includes a back base plate and a back side plate connected to the periphery of the back base plate, and also includes a transfer mechanism, an inner middle frame, a diffusion plate, a diffusion sheet and a heat-conducting layer. The transfer mechanism includes an inner transfer member and an transfer plate, the inner transfer member is connected to the back base plate, the transfer plate is connected to the inner transfer member and the back base plate, and a light source is provided on the transfer plate; the inner middle frame is connected to the inner transfer member; the diffusion plate is provided on the inner middle frame; the diffusion sheet is stacked on the diffusion plate; and the heat-conducting layer is provided on both side surfaces of the back base plate along its thickness direction.

[0006] In one embodiment, the heat-conducting layer is a graphene coating;

[0007] The heat-conducting layer covers both side surfaces of the back plate along the thickness direction thereof, and the adapter plate is in contact with the heat-conducting layer.

[0008] In one embodiment, the inner adapter is welded to the back plate, and the adapter plate is connected to the inner adapter and the back plate via bolt connectors.

[0009] In one embodiment, the back side panel includes a main body side panel and a folded edge bent from an edge of the main body side panel toward the back bottom panel, and the folded edge is in close contact with the main body side panel.

[0010] In one embodiment, the light source is a lamp board, and the lamp board is connected to the adapter plate via the bolt connector.

[0011] In one embodiment, the inner middle frame is provided with a step, and the step includes a step bottom surface and a step side surface connected to each other;

[0012] The diffusion plate is arranged on the bottom surface of the step.

[0013] In one embodiment, an elastic member is provided on the side of the step, and the elastic member abuts against the side of the diffuser plate;

[0014] The side surface of the step is further provided with a groove which passes through the top surface of the inner middle frame, and the diffusion sheet extends into the groove.

[0015] In one embodiment, the backlight module further includes a lower frame connected to the outer side surface of the back plate and abutting against a surface of the diffusion sheet away from the diffusion plate.

[0016] The beneficial effect of the backlight module provided by the present application is that: compared with the prior art, the present application connects an inner adapter to the back panel, connects an adapter plate between the inner adapter and the back panel, connects the inner middle frame to the inner adapter, and then stacks the diffuser plate and the diffuser sheet on the inner middle frame. This eliminates the need for a snap-on structure on the back panel for connecting to the inner middle frame, and therefore eliminates the need for a shell for the back panel, reducing the overall heaviness of the backlight module. In addition, the present application arranges the light source on the adapter plate, and arranges a heat-conducting layer on both sides of the back panel along its thickness direction. Since the light source emits a large amount of heat, the heat generated by the light source can be effectively transferred to the outside of the back panel through the heat conduction effect of the heat-conducting layer without equipping the back panel with a shell, thereby improving the heat dissipation efficiency of the back panel.

[0017] An embodiment of the present application also provides a display device, comprising a backlight module and a display panel as described in any of the above embodiments, wherein the display panel is arranged on the top surface of the inner middle frame, and the side surface of the display panel away from the inner middle frame is flush with the side surface of the back side plate away from the back bottom plate.

[0018] In one embodiment, the display device further includes a driving board and a face frame, wherein the driving board is arranged on the outer side surface of the back panel; the display panel has a signal terminal, and the signal terminal is electrically connected to the driving board through a chip-on-chip film; the face frame is connected to the lower frame and covers the signal terminal and the chip-on-chip film.

[0019] In one embodiment, the signal end cover is provided with a waterproof layer, and the surface frame covers the waterproof layer.

[0020] The display device provided by the present application has the following beneficial effects: using the above-mentioned backlight module, the present application connects an inner adapter to the back panel, connects an adapter plate between the inner adapter and the back panel, connects the inner middle frame to the inner adapter, and then stacks the diffuser plate and the diffuser sheet on the inner middle frame. This eliminates the need for a snap-on structure on the back panel for connecting to the inner middle frame, and therefore eliminates the need for a shell for the back panel, reducing the overall heaviness of the backlight module. In addition, the present application arranges the light source on the adapter plate, and arranges a heat-conducting layer on both sides of the back panel along its thickness direction. Since the light source emits a large amount of heat, the heat generated by the light source can be effectively transferred to the outside of the back panel through the heat conduction effect of the heat-conducting layer without equipping the back panel with a shell, thereby improving the heat dissipation efficiency of the back panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded view of the backlight module provided in Example 1 of the present application;

[0022] Figure 2 This is a schematic diagram of a heat-conducting layer provided on the outer side of the back plate of the backlight module provided in the first embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the installation of the internal adapter of the backlight module provided in the first embodiment of the present application;

[0024] Figure 4 yes Figure 1 The enlarged view of point I in FIG.

[0025] Figure 5 This is a schematic diagram of the partial structure of the inner middle frame of the backlight module provided in the first embodiment of the present application;

[0026] Figure 6 is an exploded view of the display device provided in Example 2 of the present application;

[0027] Figure 7 is a cross-sectional view of a side of a display device provided in Example 2 of the present application, where a face frame is provided;

[0028] Figure 8 It is a cross-sectional view of a side of the display device provided in the second embodiment of the present application, which is opposite to the frame.

[0029] Reference numerals: 101, back bottom plate; 102, back side plate; 1021, body side plate; 1022, folding edge; 21, inner adapter; 22, adapter plate; 23, bolt connection member;

[0030] 3. Light source; 4. Inner middle frame; 40. Step; 401. Step bottom; 402. Step side; 41. Elastic member; 42. Groove;

[0031] 5. Diffuser plate; 6. Diffuser sheet; 7. Thermal conductive layer; 8. Bottom frame;

[0032] 100, backlight module; 200, display panel; 201, chip-on-film; 202, waterproof layer; 9, driver board; 10, face frame. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] It should also be noted that, in the embodiments of the present application, the same figure mark represents the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0038] The embodiments of the present application provide a backlight module and a display device, which solve the problem that the display device assembled with the existing backlight module is relatively thick and heavy as a whole and the heat dissipation effect of the backplate is poor.

[0039] In the related art, the backlight module is based on the backplane, a light source is arranged on the backplane, and an inner middle frame is installed on the inner side of the backplane. The inner middle frame is connected to the backplane through a snap-fit ​​structure, and then a diffuser plate, a diffuser sheet and an optical film are stacked in sequence on the top of the inner middle frame. When the backlight module is used to assemble a display device, a display panel is arranged on the top of the outer middle frame. Since the snap-fit ​​structure connecting the backplane and the inner middle frame is exposed on the outside of the backplane, a shell is required to wrap the display panel and the backplane to block the outside of the backplane to form a display device. The overall appearance of the display device made in this way is relatively thick, which greatly affects the look and feel of the display device. In addition, the heat emitted by the light source needs to pass through the shell and the backplane to be dissipated, and the heat dissipation is relatively difficult, which leads to poor heat dissipation efficiency of the backplane.

[0040] Example 1

[0041] refer to Figure 1 The backlight module provided in the first embodiment of the present application includes a back base plate 101 and a back side plate 102 connected to the periphery of the back base plate 101 .

[0042] Among them, the backlight module also includes a transfer mechanism, an inner middle frame 4, a diffusion plate 5, a diffusion sheet 6 and a thermal conductive layer 7. The transfer mechanism includes an inner transfer member 21 and an transfer plate 22. The inner transfer member 21 is connected to the back base plate 101. The transfer plate 22 is connected to the inner transfer member 21 and the back base plate 101. A light source 3 is provided on the transfer plate 22. The light source 3 can be a white light source, specifically a light strip or a light board, which is not specifically limited in the embodiment of the present application; the inner middle frame 4 is connected to the inner transfer member 21; the diffusion plate 5 is provided on the inner middle frame 4; the diffusion sheet 6 is stacked on the diffusion plate 5; and the thermal conductive layer 7 is provided on both side surfaces of the back base plate 101 along its thickness direction.

[0043] In the embodiment of the present application, an inner adapter 21 is connected to the back panel 101, an adapter plate 22 is connected to the back panel 101 and the inner adapter 21, the inner middle frame 4 is connected to the inner adapter 21, and the light source 3 is arranged on the adapter plate 22. In this way, the connection between the inner middle frame 4 and the back side panel 102 is completed through the inner adapter 21, which can avoid the inner middle frame 4 being directly connected to the back side panel 102 by snapping. The light source 3 is changed from being arranged on the back panel 101 to being arranged on the adapter plate 22, so that the outer side of the back panel 101 and the outer side of the back side panel 102 can remain smooth and beautiful, and there is no need to additionally equip a shell to cover the exposed snap-in structure on the back panel 101 and the back side panel 102, so that the overall thickness of the backlight module is reduced. In addition, a heat-conducting layer 7 is provided on both side surfaces of the back panel 101 along its thickness direction, so that the heat emitted by the light source 3 will be dissipated through the adapter plate 22, the heat-conducting layer 7 and the back panel 101, thereby making it easier for the heat emitted by the light source 3 to be dissipated from the backlight module, thereby improving the heat dissipation efficiency of the back panel 101.

[0044] It should be noted that the adapter plate 22 can be made of a metal material with strong thermal conductivity, such as iron. In this way, the light source 3 is directly set on the adapter plate 22, and the heat emitted by the light source 3 will be transferred to the adapter plate 22, and then transferred from the back plate 101 through the thermal conductive layer 7, thereby realizing the dissipation of the heat generated by the light source 3 and effectively improving the heat dissipation efficiency of the back plate 101.

[0045] Specifically, the inner middle frame 4 and the inner adapter 21 can be connected by a snap-fit ​​connection. In this way, after the inner adapter 21 is connected to the back base plate 101, the inner middle frame 4 can be installed by snapping it onto the inner adapter 21, making the installation of the inner middle frame 4 simpler. This is equivalent to transferring the snap-fit ​​connection between the inner middle frame 4 and the back side plate 102 in the prior art to the snap-fit ​​connection between the inner middle frame 4 and the inner adapter 21, thereby keeping the outer side of the back side plate 102 smooth and beautiful, thereby improving the appearance of the backlight module.

[0046] In some embodiments, reference Figure 2 The heat-conducting layer 7 is a graphene coating; the heat-conducting layer 7 covers both sides of the back plate 101 along its thickness direction, and the adapter plate 22 is in contact with the heat-conducting layer 7. This can increase the rate at which the heat generated by the light source 3 is dissipated, thereby improving the heat dissipation efficiency of the back plate 101.

[0047] It should be noted that graphene is an allotrope of carbon, with carbon atoms arranged in sp 2Hybrid bonding forms a single layer of hexagonal honeycomb lattice graphene. Graphene has very good thermal conductivity. Graphene can be directly sprayed on the two side surfaces of the back base plate 101 along its thickness direction to form a heat-conducting layer 7. The heat-conducting layer 7 can be set by first spraying graphene on the entire inner side of the back base plate 101, waiting for the graphene to adhere to the position, then flipping the back base plate 101, and then spraying graphene on the entire outer side of the back base plate 101, waiting for the graphene to adhere to the position before proceeding to the next installation step, that is, connecting the inner adapter 21 to the back base plate 101; of course, the heat-conducting layer 7 can also be set by first connecting the inner adapter 21 to the back base plate 101, then spraying graphene on the entire inner side of the back base plate 101, waiting for the graphene to adhere to the position, flipping the back base plate 101, and spraying graphene on the entire outer side of the back base plate 101 and waiting for it to adhere to the position. The specific setting method can be freely selected by the staff according to the actual situation, and is not specifically limited in the embodiments of the present application. The whole surface spraying of graphene refers to spraying graphene on the blank position where no signal port is set.

[0048] Specifically, the inner adapter 21 can be set to an L shape, and the inner adapter 21 is connected to the back panel 101, and the adapter plate 22 is connected to the back panel 101 and the inner adapter 21. Specifically, a connecting strip can be set on the edge of the adapter plate 22, and the connecting strip is pressed on the inner adapter 21, so that the adapter plate 22, the inner adapter 21 and the back panel 101 are connected together to form a whole. Since the connecting strip is pressed on the inner adapter 21, the connection between the connecting strip and the adapter plate 22 can be bent, so that the adapter plate 22 can contact the back panel 101, and the back panel 101 is sprayed with graphene, so the adapter plate 22 can contact the thermal conductive layer 7, so that the heat generated by the light source 3 can be quickly discharged to the outside of the backlight module, thereby improving the heat dissipation efficiency of the back panel 101.

[0049] When graphene is used as the heat-conducting layer 7 to dissipate the heat of the backlight module, since the heat dissipation efficiency is improved, high-density and high-brightness optical components with large heat generation can be used as light sources 3, which can improve the competitiveness of the display device.

[0050] In some embodiments, reference Figure 3 and Figure 4 The inner adapter 21 is welded to the back panel 101, and the adapter plate 22 is connected to the inner adapter 21 and the back panel 101 via bolt connectors 23. This improves the connection strength between the inner adapter 21 and the back panel 101, enhancing its robustness. Furthermore, by connecting the adapter plate 22, the inner adapter 21, and the back panel 101 via bolt connectors 23, the installation and removal of the adapter plate 22 are quicker and more convenient. Furthermore, the installation of the adapter plate 22 increases the thickness of the back panel 101, thereby improving the overall strength of the backlight module.

[0051] The inner adapter 21 is welded to the back plate 101 in the following manner: the inner adapter 21 can be divided into three sections, and the three sections of the inner adapter 21 are sequentially placed at the positions to be welded and pressed together using a jig. The three sections of the inner adapter 21 are then welded together to the back plate 101 using a welding machine. The excess weld scars are then polished off and cleaned to prepare for the subsequent graphene spraying onto the back plate 101. Furthermore, to further strengthen the installation of the inner adapter 21, the inner adapter 21 can be welded to the back side plate 102 after being welded to the back plate 101. The weld scars should also be polished off after welding.

[0052] It should be noted that the above-mentioned bolt connector 23 is a screw, specifically a cross machine screw. Screw holes facing each other are respectively provided on the back base plate 101, the inner adapter 21 and the adapter plate 22. The screws are passed through the screw holes and locked with nuts. In this way, the installation of the adapter plate 22 is completed. The installation is relatively simple, and it is also convenient to disassemble the adapter plate 22 to repair and replace the light source 3.

[0053] In some embodiments, reference Figure 3 The back side panel 102 includes a main body side panel 1021 and a folded edge 1022 bent from the edge of the main body side panel 1021 toward the back bottom panel 101 , and the folded edge 1022 is in close contact with the main body side panel 1021 .

[0054] Through the above arrangement, the edges of the body side panels 1021 are bent toward the back panel 101, thereby increasing the strength of the back panel 102. This reduces material usage and reduces costs while maintaining the same strength. Furthermore, the bending of the body side panels 1021 creates a curved surface, meaning that the side of the back panel 102 facing away from the back panel 101 is a curved surface. This improves the overall aesthetics of the back panel 102 when it serves as the frame for the display panel 200 after the backlight module is assembled into a display device. Furthermore, the increased strength of the back panel 102 also provides better protection for the display panel 200.

[0055] In some embodiments, reference Figure 1 The light source 3 is a lamp board, which is connected to the adapter plate 22 through a bolt connector 23. In this way, the volume of the light source 3 becomes smaller, which is not only conducive to the rapid installation of the light source 3, but also conducive to reducing the thickness of the backlight module.

[0056] It should be noted that the bolt connector 23 can be a screw. When the light board is used as the light source 3, screw holes can be first opened on the adapter plate 22 during installation, and then the screws can be inserted into the screw holes and then locked with nuts. This makes the installation of the light source 3 simple and quick, and is also convenient for disassembly, repair and replacement of the light source 3, and avoids material loss when disassembling the light source 3. Since the light board is installed on the adapter plate 22, the light board can be installed on the adapter plate 22 in advance. In this way, when assembling the backlight module, the adapter plate 22 can be directly connected to the inner adapter 21 and the back base plate 101 to complete the installation of the adapter plate 22 and the light source 3 at the same time, further improving the assembly efficiency of the backlight module.

[0057] In addition to using bolt connectors 23 to install the light board on the adapter plate 22, in some cases, the light board can also be installed by bonding. Specifically, adhesive glue, which can be a strip of double-sided tape, is pasted on the adapter plate 22. Then, the light board is directly pasted on the strip of double-sided tape to complete the installation of the light source 3. The entire installation process is simple and fast, which greatly improves the installation efficiency of the light source 3.

[0058] In some embodiments, reference Figure 5 The inner middle frame 4 is provided with a step 40 , and the step 40 includes a step bottom surface 401 and a step side surface 402 connected to each other; the diffuser 5 is provided on the step bottom surface 401 .

[0059] Through the above arrangement, a step 40 is provided on the inner middle frame 4, the diffuser plate 5 is provided on the bottom surface 401 of the step 40, and the diffuser sheet 6 is stacked on the diffuser plate 5. Compared with the prior art in which the diffuser plate 5 and the diffuser sheet 6 are provided on the top surface of the inner middle frame 4, the arrangement positions of the diffuser plate 5 and the diffuser sheet 6 in the present application enable the diffuser plate 5 and the diffuser sheet 6 to overlap with the inner middle frame 4 in the thickness direction of the back base plate 101, that is, in the thickness direction of the back base plate 101, the size of the overall structure after the diffuser plate 5 and the diffuser sheet 6 are provided on the inner middle frame 4 is less than or equal to the sum of the sizes of the inner middle frame 4, the diffuser plate 5 and the diffuser sheet 6. In this way, the thickness of the backlight module can be effectively reduced, thereby making the display device assembled using the backlight module thinner as a whole.

[0060] It should be noted that the inner middle frame 4 includes a middle frame side surface and a middle frame top surface, and a step 40 is set at the connection between the middle frame side surface and the middle frame top surface. The step 40 surrounds the light source 3, and the step bottom surface 401 and the step side surface 402 of the step 40 are perpendicular to each other. This not only allows the diffuser plate 5 to be placed more stably on the step bottom surface 401 and better diffuse the light emitted by the light source 3, but also facilitates the rapid placement of the diffuser plate 5 on the step bottom surface 401, thereby improving the installation efficiency of the diffuser plate 5.

[0061] In some embodiments, reference Figure 5An elastic member 41 is provided on the side surface 402 of the step, and the elastic member 41 abuts against the side surface of the diffuser plate 5; the elastic member 41 can better fix the diffuser plate 5 after it is placed on the bottom surface 401 of the step, and it is not easy for the diffuser plate 5 to shake and shift, thereby affecting the diffusion effect of light.

[0062] It should be noted that the elastic member 41 is embedded in the side surface 402 of the step. When the diffuser plate 5 is placed on the bottom surface 401 of the step, the elastic member 41 is pressed inward, thereby exerting a reverse force on the diffuser plate 5, thereby fixing the position of the diffuser plate 5 and preventing it from shaking or moving. The elastic member 41 can be an elastic member 41 that can deform and automatically recover according to temperature changes. This allows the diffuser plate 5 to always remain in the center position, thereby ensuring that the display effect of the display device is not affected by temperature differences, thereby improving the display effect.

[0063] Specifically, there are four step side surfaces 402, and at least one elastic member 41 can be disposed on each step side surface 402. If one elastic member 41 is disposed on each step side surface 402, then the elastic member 41 is located in the middle of the step side surface 402. In this way, the four elastic members 41 can evenly apply pressure to the diffuser plate 5, making the diffuser plate 5 more securely installed. If multiple elastic members 41 are disposed on each step side surface 402, then the multiple elastic members 41 are evenly distributed on the step side surface 402, which also ensures a more secure installation of the diffuser plate 5.

[0064] The elastic member 41 may be an elastic sheet or other elastic structure. The embodiment of the present application does not make any specific setting. As long as it can realize the elastic function, it can abut the diffuser plate 5 and apply pressure to the diffuser plate 5 when the diffuser plate 5 is placed on the bottom surface 401 of the step.

[0065] It should be noted that after the elastic member 41 is set on the step side 402, the size of the elastic member 41 in the thickness direction of the back base plate 101 can be less than or equal to the thickness of the diffuser plate 5, so that when the diffuser 6 is stacked on the diffuser plate 5, it will not be restricted by the elastic member 41, which will limit the placement position of the diffuser 6 and affect the installation efficiency of the diffuser 6; the size of the elastic member 41 in the thickness direction of the back base plate 101 can also be greater than the thickness of the diffuser plate 5, so that the diffuser 6 can be set to the same shape and size as the diffuser plate 5. When installing the diffuser 6, due to the restriction of the elastic member 41, the installation position of the diffuser 6 can be made more precise, which is conducive to the diffuser 6 to better perform the function of diffusing light, and the elastic member 41 will also abut the diffuser 6, thereby fixing the diffuser 6.

[0066] In some embodiments, reference Figure 5The step side 402 is also provided with a groove 42 that passes through the top surface of the inner middle frame 4, and the diffuser 6 extends into the groove 42. In this way, the diffuser 6 can be fixed, the installation position of the diffuser 6 is more accurate, and the light diffusion effect is better achieved.

[0067] It should be noted that two grooves 42 can be respectively set on two opposite step side surfaces 402, and the two grooves 42 set on the same step side surface 402 are located on both sides of the step side surface 402. Correspondingly, when manufacturing the diffuser 6, two protruding blocks need to be respectively set on two opposite sides, and the two protruding blocks on the same side respectively extend into the two grooves 42 on the same step side surface 402. In this way, after the diffuser 6 is placed on the diffuser plate 5, the grooves 42 can be used to limit the diffuser 6, so that the diffuser 6 is installed more firmly and is not easy to shift.

[0068] When the above-mentioned groove 42 is set, the bottom surface of the groove 42 can be flush with the diffuser plate 5. In this way, after the diffuser sheet 6 is stacked on the diffuser plate 5, the protruding block of the diffuser sheet 6 will be located on the bottom surface of the groove 42, which is conducive to the placement of the diffuser sheet 6 more stably, and the depth of the groove 42 can be greater than or equal to the thickness of the diffuser sheet 6, so that the diffuser sheet 6 will not protrude from the inner middle frame 4, so that the overall size formed after the inner middle frame 4, the diffuser plate 5 and the diffuser sheet 6 are installed together in the thickness direction of the back bottom plate 101 is equal to the size of the inner middle frame 4 in the thickness direction of the back bottom plate 101, thereby effectively reducing the thickness of the backlight module, so that the overall display device made using the backlight module becomes thinner, the visual experience is improved, and it is conducive to the trend of thinning display devices.

[0069] In some embodiments, reference Figure 1 The backlight module further includes a lower frame 8, which is connected to the outer side of the back plate 102 and abuts against the surface of the diffuser 6 away from the diffuser plate 5. In this way, after the diffuser 6 is stacked on the diffuser plate 5, the lower frame 8 can press the diffuser 6 tightly to improve the installation security of the diffuser 6.

[0070] It should be noted that the lower frame 8 is L-shaped, one side of which is connected to the outer side of the back panel 102, and the other side is parallel to the diffuser 6 and presses the diffuser 6. Specifically, the lower frame 8 and the outer side of the back panel 102 can be connected by a snap-fit ​​structure or by bolts. The setting of the lower frame 8 can not only further limit the diffuser 6, but also provide a connection position for the face frame 10 that needs to cover the connecting line connecting the display panel 200 and the driver board 9 after the display panel 200 is installed on the backlight module.

[0071] Example 2

[0072] refer to Figure 6and Figure 8 , embodiment 2 of the present application provides a display device, including a backlight module 100 and a display panel 200 as in embodiment 1 above, the display panel 200 is arranged on the top surface of the inner middle frame 4, and the side surface of the display panel 200 away from the inner middle frame 4 is flush with the side surface of the back plate 102 away from the back bottom plate 101.

[0073] The detailed structure of the backlight module 100 can be referred to the above-mentioned embodiment and will not be repeated here; it can be understood that since the above-mentioned backlight module 100 is used in the display device of the present application, the embodiment of the display device of the present application includes all the technical solutions of all the embodiments of the above-mentioned backlight module 100, and can achieve the technical effects achieved by the above-mentioned technical solutions.

[0074] Since the diffusion sheet 6 in the above-mentioned backlight module 100 does not protrude from the top surface of the inner middle frame 4, the display panel 200 can be set on the top surface of the inner middle frame 4. Generally, the back plate 102 is higher than the inner middle frame 4, so the display panel 200 will be located on the inner side of the back plate 102. The present application sets the surface of the side of the display panel 200 away from the inner middle frame 4 and the surface of the side of the back plate 102 away from the back bottom plate 101 to be flush, so that the back plate 102 is equivalent to a shell set on the outside of the display panel 200. There is no need to set an outer shell on the outside of the back plate 102 as in the prior art. It not only saves materials and reduces the manufacturing process, but also reduces the overall thickness of the display device and makes the overall shape of the display device more beautiful. At the same time, there is no plastic part as the frame of the display panel 200, which can avoid the thermal expansion and contraction problem of the reliability test of the frame and better protect the display panel 200.

[0075] It should be noted that the display panel 200 is set on the top surface of the inner middle frame 4 by bonding. Since the lower frame 8 is pressed on the diffuser 6, a portion of the inner middle frame 4 is pressed under the lower frame 8. Therefore, the specific setting method of the display panel 200 can be: first, affix foam double-sided tape to the top surface of the inner middle frame 4 and the side of the lower frame 8 away from the diffuser 6, and then affix the display panel 200 to the foam double-sided tape to complete the setting of the display panel 200. The inner middle frame 4 and the lower frame 8 together support the display panel 200. The foam double-sided tape here not only allows the display panel 200 to be affixed to the inner middle frame 4, but also plays a certain buffering role, forming protection for the display panel 200.

[0076] In some embodiments, reference Figure 6 and Figure 7The display device also includes a driving board 9 and a face frame 10. The driving board 9 is arranged on the outer side of the back plate 101. The display panel 200 has a signal terminal, which is electrically connected to the driving board 9 through the chip-on-film 201. The face frame 10 is connected to the lower frame 8 and covers the signal terminal and the chip-on-film 201.

[0077] It should be noted that after the display panel 200 is set on the inner middle frame 4, it is necessary to connect the display panel 200 to the driving board 9 to transmit signals to the display panel 200. Since the side of the display panel 200 is covered by the back plate 102, a signal end can be set on the surface of the side of the display panel 200 away from the inner middle frame 4, and the signal end is electrically connected to the driving board 9 through the chip-on-chip film 201. Specifically, the chip-on-chip film 201 can be bent so that the signal end located on the display panel 200 is electrically connected to the driving board 9 located on the outer side of the back plate 101. This can reduce the overall volume of the display device and reduce the overall thickness of the display device.

[0078] Furthermore, a face frame 10 is provided connected to the lower frame 8 to cover the signal terminals and chip-on-film 201 exposed to the outside world. This not only enhances the overall aesthetics of the display device but also protects the signal terminals and chip-on-film 201. Specifically, the face frame 10 can be secured to the lower frame 8 using Phillips machine screws. A high-density sponge can be provided between the face frame 10 and the display panel 200 to provide a cushioning effect.

[0079] The above-mentioned driving board 9 can be attached to the outer side of the back panel 101 by double-sided tape, or it can be screwed to the outer side of the back panel 101. In addition to being electrically connected to the display panel 200, the above-mentioned driving board 9 also needs to be connected to the light source 3. When the lamp board is used as the light source 3, a signal interface can be set on the surface of the lamp board on the side facing away from the light-emitting side, and holes can be opened at the positions corresponding to the signal interfaces on the adapter board 22 and the back panel 101 for the signal lines connected to the signal interfaces to pass through and be electrically connected to the driving board 9. The process of lighting the lamp board is as follows: an external power supply or signal source provides power output to the driving board 9 to light the lamp board, and provides an output signal to the driving board 9 so that the lamp beads of the lamp board can be zoned to control the brightness of the lamp beads or turn them on and off; the light emitted by the lamp board is diffused by the diffuser plate 5 and the diffuser 6 and then reaches the display panel 200. Different display images can be displayed by inputting the external image signal source into the display panel 200.

[0080] In some embodiments, reference Figure 6-Figure 7The signal terminal is covered with a waterproof layer 202, and the face frame 10 covers the waterproof layer 202. Since the signal terminal is located on the side of the display panel 200 away from the inner middle frame 4, the provision of the waterproof layer 202 can effectively prevent the signal terminal from being intruded by water vapor during use of the display device, causing the display device to malfunction.

[0081] The waterproof layer 202 can be made of waterproof Mylar, which can be directly attached to the signal end. The waterproof layer 202 can be a conductive waterproof layer, which can better play the role of anti-corrosion and anti-static.

[0082] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A backlight module, comprising a back bottom plate (101), and a back side plate (102) connected to the periphery of the back bottom plate (101), characterized in that: Also includes: The adapter mechanism comprises an inner adapter (21) and an adapter plate (22), wherein the inner adapter (21) is connected to the back plate (101), the adapter plate (22) is connected to the inner adapter (21) and the back plate (101), and a light source (3) is provided on the adapter plate (22); An inner middle frame (4) connected to the inner adapter (21); A diffusion plate (5) is arranged on the inner middle frame (4); A diffusion sheet (6) is stacked on the diffusion plate (5); The heat conducting layer (7) is arranged on both side surfaces of the back base plate (101) along the thickness direction thereof.

2. The backlight module according to claim 1, characterized in that: The heat-conducting layer (7) is a graphene coating; The heat-conducting layer (7) covers the two side surfaces of the back plate (101) along the thickness direction thereof, and the adapter plate (22) is in contact with the heat-conducting layer (7).

3. The backlight module according to claim 2, characterized in that: The inner adapter (21) is welded to the back bottom plate (101), and the adapter plate (22) is connected to the inner adapter (21) and the back bottom plate (101) via a bolt connector (23); And / or, the back side panel (102) comprises a main body side panel (1021) and a folded edge (1022) bent from the edge of the main body side panel (1021) toward the back bottom panel (101), and the folded edge (1022) is in close contact with the main body side panel (1021).

4. The backlight module according to claim 2, characterized in that: The light source (3) is a lamp board, and the lamp board is connected to the adapter plate (22) via a bolt connector (23).

5. The backlight module according to any one of claims 1 to 4, characterized in that: The inner middle frame (4) is provided with a step (40), and the step (40) comprises a step bottom surface (401) and a step side surface (402) connected to each other; The diffusion plate (5) is arranged on the bottom surface (401) of the step.

6. The backlight module according to claim 5, characterized in that: An elastic member (41) is provided on the side surface (402) of the step, and the elastic member (41) abuts against the side surface of the diffusion plate (5); The side surface (402) of the step is also provided with a groove (42) penetrating the top surface of the inner middle frame (4), and the diffusion sheet (6) extends into the groove (42).

7. The backlight module according to claim 6, characterized in that: Also includes: A lower frame (8), the lower frame (8) being connected to the outer side surface of the back plate (102) and abutting against a side surface of the diffusion sheet (6) away from the diffusion plate (5).

8. A display device, characterized in that: include: The backlight module (100) as claimed in claim 7; The display panel (200) is arranged on the top surface of the inner middle frame (4), and a side surface of the display panel (200) away from the inner middle frame (4) is flush with a side surface of the back side plate (102) away from the back bottom plate (101).

9. The display device according to claim 8, characterized in that: Also includes: A driving plate (9) arranged on the outer side of the back bottom plate (101); The display panel (200) has a signal terminal, and the signal terminal is electrically connected to the driving board (9) via a chip-on-chip film (201); A surface frame (10) is connected to the lower frame (8) and covers the signal terminal and the chip-on-film (201).

10. The display device according to claim 9, characterized in that: The signal end upper cover is provided with a waterproof layer (202), and the surface frame (10) covers the waterproof layer (202).

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