Backlight module and display device

Abstract

The embodiment of the utility model relates to the technical field of display devices, and discloses a backlight module and a display device.The backlight module comprises a back plate, a diffusion plate, a diaphragm, a first buffer part and a limiting part, the back plate is provided with a first through hole and a mounting groove, and the first through hole is communicated with the mounting groove; the diffusion plate is fixed with the back plate; the diaphragm and the diffusion plate are overlapped, the diaphragm and the diffusion plate are both partially accommodated in the mounting groove, and the diaphragm is provided with a positioning hole; the first buffer piece is arranged on the side, away from the diffusion plate, of the diaphragm, the end, away from the diaphragm, of the first buffer piece abuts against the back plate, the diffusion plate and the first buffer piece are jointly used for limiting movement of the diaphragm in the first direction, and the first direction is parallel to the stacking direction of the diaphragm and the diffusion plate; the limiting piece is fixed with the back plate, the limiting piece is arranged in the first through hole and the positioning hole in a penetrating mode so as to limit the diaphragm to move in the second direction and the third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other. According to the embodiment of the utility model, the risk that the diaphragm falls off can be reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of display devices, and in particular to a backlight module and a display device. Background Art

[0002] See also Figure 1 The existing display device 100' includes a back plate 1', a diffuser 2', a diaphragm 3', a reflective paper 4' and a front frame 5', the front frame 5' is fixed to one end of the back plate 1', the diffuser 2' and the diaphragm 3' are stacked, the diaphragm 3' is stacked on the diffuser 2', the diffuser 2' is fixed to the back plate 1', the reflective paper 4' is fixed to the back plate 1', and the reflective paper 4' is located on the side of the diffuser 2' away from the diaphragm 3'.

[0003] When installing the diaphragm 3 ′, a jig is needed to fix the diaphragm 3 ′ and the diffuser plate 2 ′ with double-sided adhesive, and then assemble them together on the back plate 1 ′.

[0004] During the implementation of the present invention, the inventors found that the thermal expansion coefficients of the membrane 3 ′ and the diffuser 2 ′ are different. When heated, the membrane 3 ′ is easily deformed to form a membrane arch or even fall off, which affects product quality. Utility Model Content

[0005] The main technical problem solved by the embodiments of the utility model is to provide a backlight module and a display device, which can provide positioning between the diaphragm and the back plate, thereby improving the installation accuracy between the diaphragm and the back plate.

[0006] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: a backlight module is provided, including a back plate, a diffuser plate, a diaphragm, a first buffer and a limiter, a first through hole is opened on one end of the back plate, and a mounting groove is formed, the first through hole and the mounting groove are connected; at least part of the diffuser plate is accommodated in the mounting groove, and the diffuser plate is fixed to the back plate; the diaphragm is stacked with the diffuser plate, at least part of the diaphragm is accommodated in the mounting groove, and the diaphragm is provided with a positioning hole; the first buffer is arranged on the side of the diaphragm away from the diffuser plate, and one end of the first buffer away from the diaphragm abuts against the back plate, the diffuser plate and the first buffer are used together to limit the movement of the diaphragm along a first direction, and the first direction is parallel to the direction in which the diaphragm and the diffuser plate are stacked; the limiter is fixed to the back plate, and at least part of the limiter is penetrated in the first through hole and the positioning hole along the first direction to limit the movement of the diaphragm along the second direction and the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. In this embodiment, the diffuser plate is fixed to the back plate, the diaphragm is stacked on the diffuser plate, and the first buffer is arranged on the side of the diaphragm away from the diffuser plate, so that the diffuser plate and the first buffer can jointly limit the movement of the diaphragm in the first direction. A first through hole and a mounting groove are arranged at one end of the back plate, a positioning hole is arranged on the diaphragm, at least a portion of the diaphragm is accommodated in the mounting groove, the limiting member is fixed to the back plate, and at least a portion of the limiting member passes through the first through hole and the positioning hole, thereby limiting the movement of the diaphragm in the second direction and the third direction, thereby achieving the limitation of the diaphragm, and there is no need to use adhesive to fix the diaphragm to the diffuser plate, thereby reducing the risk of diaphragm arching or falling off.

[0007] In some embodiments, a bending portion is formed at one end of the back plate, the first through hole and the mounting groove are both arranged at the bending portion, and the limiting member is fixed to the bending portion.

[0008] In some embodiments, the position-limiting member is formed with an abutting portion and a first clamping portion, the abutting portion abuts against the first surface of the bent portion, and the first clamping portion abuts against the second surface of the bent portion, wherein the first through hole passes through the first surface and the second surface, and the second surface constitutes a partial boundary of the mounting groove. In this embodiment, by making the first clamping portion abut against the second surface and the abutting portion abut against the first surface, the position-limiting member can be limited, which is conducive to improving the stability of the position-limiting member on the diaphragm.

[0009] In some embodiments, the first clamping portion is formed with a first connecting section and a first clamping section, one end of the first clamping section is connected to the first connecting section, and the first clamping section abuts against the second surface.

[0010] In some embodiments, the position-limiting member is further formed with a second clamping portion, and along the second direction, the second clamping portion and the first clamping portion are respectively located on both sides of the abutting portion, and the second clamping portion abuts against the second surface. In this embodiment, by providing the second clamping portion and abutting against the second surface, the stability of the position-limiting member can be improved, thereby improving the stability of the position-limiting member on the diaphragm.

[0011] In some embodiments, the position-limiting member is formed with an abutting portion, and the abutting portion is bonded and fixed to the bending portion. In this embodiment, by bonding and fixing the abutting portion to the bending portion, the stability of the position-limiting member on the diaphragm can be improved.

[0012] In some embodiments, the bending portion is bent to form a first plate body, a bending plate and a second plate body. The bending plate is arranged at one end of the first plate body, and the second plate body is arranged at an end of the bending plate away from the first plate body. The first plate body, the bending plate and the second plate body are jointly enclosed to form an installation groove, the first through hole is arranged in the second plate body, and the diaphragm is fixed to the second plate body.

[0013] In some embodiments, the first plate body is provided with a second through hole, the second through hole is communicated with the mounting groove, and at least a portion of the stopper is plugged into the second through hole. In this embodiment, by providing the second through hole in the first plate body, at least a portion of the stopper is plugged into the second through hole, thereby reducing the risk of the end of the stopper away from the abutment portion swinging, thereby improving the stability of the stopper limiting the diaphragm.

[0014] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide a display device, including a screen assembly and the above backlight module, the screen assembly is fixed to the surface of the back plate away from the membrane.

[0015] In some embodiments, the display device further includes a second buffer component, which is disposed between the screen assembly and the back plate, and the second buffer component is fixed to the screen assembly and the back plate respectively.

[0016] The beneficial effects of the embodiments of the utility model are as follows: different from the prior art, in the embodiments of the utility model, by fixing the diffuser plate and the back plate, overlapping the diaphragm and the diffuser plate, and arranging the first buffer member on the side of the diaphragm away from the diffuser plate, so that the diffuser plate and the first buffer member can jointly limit the movement of the diaphragm in a first direction, by arranging a first through hole and a mounting groove at one end of the back plate, arranging a positioning hole on the diaphragm, at least a portion of the diaphragm is accommodated in the mounting groove, fixing the limiting member to the back plate, and at least a portion of the limiting member passes through the first through hole and the positioning hole along the first direction, thereby limiting the movement of the diaphragm in the second direction and the third direction, thereby achieving the limitation of the diaphragm, and there is no need to use adhesive to fix the diaphragm to the diffuser plate, thereby reducing the risk of diaphragm arching or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0018] Figure 1 It is a structural schematic diagram of a backlight module of the prior art;

[0019] Figure 2 It is a structural schematic diagram of a backlight module provided in an embodiment of the utility model;

[0020] Figure 3 yes Figure 2 Schematic diagram of the partial structure of the backlight module after the middle section is cut along AA;

[0021] Figure 4 yes Figure 2 A magnified view of the area shown in part B;

[0022] Figure 5 It is a structural schematic diagram of a back plate and a limiting member provided in an embodiment of the utility model;

[0023] Figure 6 is a schematic structural diagram of a position-limiting member including a first clamping portion provided in an embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the limiter, the diaphragm and the diffuser provided in the embodiment of the utility model;

[0025] Figure 8 is a schematic structural diagram of a position-limiting member provided in an embodiment of the utility model without excluding the first clamping portion;

[0026] Fig. 9 is a schematic diagram of the structure of a display device provided in an embodiment of the utility model;

[0027] Fig.10 yes Fig. 9 Magnified view of the area shown in center C.

[0028] Reference Numbers

[0029]

[0030] DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying 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 the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0033] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] In the prior art, see Figure 1 The existing display device 100' includes a back plate 1', a diffuser 2', a diaphragm 3', a reflective paper 4' and a front frame 5', the front frame 5' is fixed to one end of the back plate 1', the diffuser 2' and the diaphragm 3' are stacked, the diaphragm 3' is stacked on the diffuser 2', the diffuser 2' is fixed to the back plate 1', the reflective paper 4' is fixed to the back plate 1', and the reflective paper 4' is located on the side of the diffuser 2' away from the diaphragm 3'. There is no positioning mechanism between the diaphragm 3' and the back plate 1', which makes it difficult to position the diaphragm 3' and the back plate 2', which easily affects the imaging quality of the display device 100'.

[0035] In order to improve the installation accuracy between the back plate 1' and the diaphragm 3', the existing practice is to set up a set of positioning jigs, position the diaphragm 3' and the diffuser 2' in the positioning jigs, and then fix them by bonding, and then install the diaphragm 3' and the diffuser 2' as a whole into the back plate 1'. However, in this way, due to the different expansion coefficients of the diffuser 2' and the diaphragm 3', when the two are heated, the diaphragm 3' is prone to arching or even falling off, thereby affecting the quality of the product.

[0036] In order to solve the above problems, the present application provides a backlight module and a display device, which limits the movement of the diaphragm in the first direction by a diffusion plate and a first buffer component, and limits the movement of the diaphragm in the second direction and the third direction by setting a limit component, thereby fixing the diaphragm and reducing the risk of the diaphragm arching or falling off. The specific structure and function of the backlight module and display device provided by the present application are described in detail below.

[0037] See also Figure 2 and Figure 3The backlight module 1 includes a back plate 11, a diaphragm 12, a stopper 13, a diffuser plate 14 and a first buffer 16. A first through hole 1121 is provided on one end of the back plate 11, and a mounting groove 1122 is formed on one end of the back plate 11, and the first through hole 1121 is connected to the mounting groove 1122. At least part of the diffuser plate 14 is accommodated in the mounting groove 1122, and the diffuser plate 14 is fixed to the back plate 11. The diaphragm 12 is overlapped with the diffuser plate 14, and at least part of the diaphragm 12 is accommodated in the mounting groove 1122. The diaphragm 12 is provided with a positioning hole 121, and the positioning hole 121 is located at the part of the diaphragm 12 accommodated in the mounting groove 1122. The first buffer 16 is provided on the side of the diaphragm 12 away from the diffuser plate 14, and one end of the first buffer 16 away from the diaphragm 12 abuts against the back plate 11. That is, the diaphragm 12 is located between the diffuser 14 and the first buffer 16, so that the diffuser 14 and the first buffer 16 can jointly limit the movement of the diaphragm 12 in the first direction X, wherein the first direction X is parallel to the direction in which the diaphragm 12 and the diffuser 14 are stacked. The stopper 13 is fixed to the back plate 11, and at least a portion of the stopper 13 passes through the first through hole 1121 and the positioning hole 121 in sequence along the first direction X, thereby limiting the movement of the diaphragm 12 along the second direction Y and the third direction Z, thereby achieving the fixation of the diaphragm 12. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. In this embodiment, the diffuser plate 14 is fixed to the back plate 11, the diaphragm 12 is overlapped with the diffuser plate 14, and the first buffer member 16 is arranged on the side of the diaphragm 12 away from the diffuser plate 14, so that the diffuser plate 14 and the first buffer member 16 can jointly limit the movement of the diaphragm 12 in the first direction X. By arranging a first through hole 1121 and a mounting groove 1122 at one end of the back plate 11, a positioning hole 121 is arranged in the diaphragm 12, at least a portion of the diaphragm 12 is accommodated in the mounting groove 1122, the limiting member 12 is fixed to the back plate 11, and at least a portion of the limiting member 12 passes through the first through hole 1121 and the positioning hole 121 along the first direction X, thereby limiting the movement of the diaphragm 12 along the second direction Y and the third direction Z, thereby achieving the limitation of the diaphragm 12, and there is no need to use adhesive to fix the diaphragm 12 to the diffuser plate 14, thereby reducing the risk of the diaphragm 12 having a film arch or falling off. In addition, in this embodiment, there is no need to use a fixture to bond and fix the diffuser plate 14 and the diaphragm 12, which is helpful to simplify the installation steps, thereby improving the installation efficiency and saving costs.

[0038] In some embodiments, see Figure 3 and Figure 4 One end of the back plate 11 is bent to form a bent portion 112 , the first through hole 1121 and the mounting groove 1122 are both disposed in the bent portion 112 , and the stopper 13 is fixed to the bent portion 112 .

[0039] In some embodiments, the bending portion 112 is formed with a first plate 1123, a bending plate 1124, and a second plate 1125. The portion of the back plate 11 excluding the bending portion 112 is the main body 111, one end of the first plate 1123 is disposed at one end of the main body 111, one end of the bending plate 1124 is disposed at one end of the first plate 1123 away from the main body 111, the bending plate 1124 is bent, one end of the second plate 1125 is disposed at one end of the bending plate 1124 away from the first plate 1123, and along the first direction X, the first plate 1123 and the second plate 1125 are opposite to each other, so that the first plate 1123, the bending plate 1124 and the second plate 1125 are enclosed together to form the above-mentioned mounting groove 1122. The first through hole 1121 is provided on the second plate 1125, and the first through hole 1121 passes through the second plate 1125, so that the first through hole 1121 is connected to the mounting groove 1122. The stopper 13 is fixed to the second plate 1125, and at least a portion of the stopper 13 passes through the first through hole 1121 and the positioning hole 121 of the diaphragm 12 in sequence along the first direction X, so that the stopper 13 limits the diaphragm 12 in the second direction Y and the third direction Z.

[0040] In some embodiments, see Figure 3 and Figure 5The second plate 1125 has a first surface 11251 and a second surface 11252 opposite to each other, wherein the first surface 11251 is away from the first plate 1123, the second surface 11252 is toward the first plate 1123, the second surface 11252 constitutes a part of the boundary of the mounting groove 1122, and the two ends of the first through hole 1121 are connected to the first surface 11251 and the second surface 11252 respectively. The stopper 13 is formed with a plug-in portion 131, an abutting portion 132 and a first clamping portion 133, one end of the abutting portion 132 is arranged at one end of the plug-in portion 131, and the plug-in portion 131 and the abutting portion 132 are arranged in a substantially L-shaped manner. One end of the first clamping portion 133 is arranged at the plug-in portion 131, and the other end of the first clamping portion 133 is suspended relative to the plug-in portion 131 and the abutting portion 132, so that the first clamping portion 133 can swing relative to the plug-in portion 131 under the action of an external force. In the second direction Y, the first clamping portion 133 is located at one side of the abutting portion 132. The plug-in portion 131 passes through the first through hole 1121 and the positioning hole 121 in sequence along the first direction X, so that the limiting member 13 limits the diaphragm 12 in the second direction Y and the third direction Z. The abutting portion 132 abuts against the first surface 11251, and the first clamping portion 133 passes through the first through hole 1121 and abuts against the second surface 11252, so that the limiting member 13 is fixed to the second plate 1125. In this embodiment, by setting the first clamping portion 133, the first clamping portion 133 can swing relative to the plug-in portion 131 under the action of external force, so that the first clamping portion 133 can pass through the first through hole 1121 and be clamped on the second surface 11252. At the same time, by making the abutting portion 132 abut against the first surface 11251, the fixation between the limit member 13 and the first plate body 1123 is achieved, which is beneficial to improve the stability of the limit member 13 on the diaphragm 12.

[0041] In some embodiments, see Figure 5 and Figure 6 The first clamping portion 133 is formed with a first connecting section 1331 and a first clamping section 1332, one end of the first connecting section 1331 is arranged at the plug-in portion 131, the other end of the first connecting section 1331 is suspended relative to the plug-in portion 131, and along the first direction X, the distance between the first connecting section 1331 and the third surface 1311 of the plug-in portion 131 gradually increases, wherein the third surface 1311 is perpendicular to the first surface 11251. One end of the first clamping section 1332 is arranged at one end of the first connecting section 1331 suspended, and the first clamping section 1332 abuts against the second surface 11252 of the second plate body 1125, thereby limiting the movement of the limiting member 13 relative to the second plate body 1125 along the first direction X.

[0042] In some embodiments, the first clamping portion 133 is further formed with a first extension section 1333, and the first extension section 1333 is disposed at one end of the first clamping section 1332 away from the first connecting section 1331. When the first clamping section 1332 abuts against the second surface 11252, in the first direction X, at least a portion of the first extension section 1333 protrudes from the first surface 11251, so that the user can disassemble the limiting member 13 by bending the first extension section 1333.

[0043] In some embodiments, the stopper 13 is further formed with a second clamping portion 134, one end of which is disposed on the plug-in portion 131, and the other end of the second clamping portion 134 is suspended relative to the plug-in portion 131, and along the second direction Y, the second clamping portion 134 and the first clamping portion 133 are respectively located on both sides of the abutting portion 132, and the second clamping portion 134 abuts against the second surface 11252 of the second plate body 1125. In this embodiment, by providing the second clamping portion 134, the second clamping portion 134 can abut against the second surface 11252 of the second plate body 1125 together with the first clamping portion 133, which is conducive to improving the stability of the fixation between the stopper 13 and the second plate body 1125.

[0044] In some embodiments, the second holding portion 134 is formed with a second connecting segment 1341 and a second holding segment 1342, one end of the second connecting segment 1341 is disposed on the plug-in portion 131, the other end of the second connecting segment 1341 is suspended relative to the plug-in portion 131, and the distance between the second connecting segment 1341 and the third surface 1311 of the plug-in portion 131 gradually increases along the first direction X. One end of the second holding segment 1342 is disposed at one end of the second connecting segment 1341 suspended, and the second holding segment 1342 abuts against the second surface 11252 of the second plate body 1125, thereby limiting the movement of the stopper 13 relative to the second plate body 1125 along the first direction X.

[0045] In some embodiments, the second clamping portion 134 is further formed with a second extension section 1343, one end of which is disposed at one end of the second clamping section 1342 away from the second connecting section 1341. When the second clamping section 1342 abuts against the second surface 11252, in the first direction X, at least a portion of the second extension section 1343 protrudes from the first surface 11251, so that the user can disassemble the stopper 13 by bending the second extension section 1343.

[0046] In some embodiments, see Figure 3 and Figure 5The first plate 1123 is provided with a second through hole 11231, one end of the second through hole 11231 is communicated with the mounting groove 1122, and at least a portion of the plug-in portion 131 is plugged into the second through hole 11231. In this embodiment, by providing the second through hole 11231 on the first plate 1123, at least a portion of the plug-in portion 131 is plugged into the second through hole 11231, thereby reducing the risk of the end of the plug-in portion 131 being away from the abutting portion 132 swinging, thereby improving the accuracy of the plug-in portion 131 in positioning the diaphragm 12.

[0047] In some embodiments, see Figure 3 The backlight module 1 also includes a reflective paper 15, which is stacked on the side of the diffuser 14 away from the diaphragm 12, and the reflective paper 15 is fixed to the diffuser 14, at least a portion of the diffuser 14 and at least a portion of the reflective paper 15 are both accommodated in the mounting groove 1122, and the reflective paper 15 is also fixed to the first plate body 1123, thereby achieving fixation between the diffuser 14 and the back plate 11.

[0048] In some embodiments, see Figure 3 and Figure 7 The diffuser 14 is provided with an avoidance groove 141 , through which the plug-in portion 131 passes. When the diffuser 14 is installed, the avoidance groove 141 can avoid the plug-in portion 131 , thereby facilitating the installation of the diffuser 14 .

[0049] In some embodiments, the stopper 13 is not only Figure 3 as well as Figure 5-7 In addition to the structure shown in , other structures can also be used. For details, please refer to Figure 8 , and combined with Figure 3 In the embodiment, the position-limiting member 13 is formed with an inserting portion 131 and an abutting portion 132, one end of the abutting portion 132 is arranged at one end of the inserting portion 131, and the inserting portion 131 and the abutting portion 132 are arranged roughly in an L shape, and the inserting portion 131 sequentially passes through the first through hole 1121 of the second plate body 1125 and the positioning hole 121 of the diaphragm 12 along the first direction X, so as to realize the position-limiting member 13 on the diaphragm 12 in the second direction Y and the third direction Z. The abutting portion 132 abuts against the first surface 11251 of the second plate body 1125, and the abutting portion 132 and the first surface 11251 are bonded and fixed by adhesive (not shown), which is conducive to improving the stability of the position-limiting member 13 on the diaphragm 12.

[0050] It can be understood that in order to improve the stability of the limitation of the diaphragm 12 in the second direction Y and the third direction Z, in some embodiments, not shown in the figure, the backlight module 1 includes a plurality of limiting members 13, a plurality of first through holes 1121 are formed at the end of the back plate 11, and the diaphragm 12 is provided with a plurality of positioning holes 121, a limiting member 13 corresponds to a first through hole 1121, and at least a portion of a limiting member 13 passes through a first through hole 1121 and a positioning hole 121 in sequence, thereby improving the stability of the limitation of the diaphragm 12 in the second direction Y and the third direction Z.

[0051] In the embodiment of the utility model, the diffuser plate 14 is fixed to the back plate 11, the diaphragm 12 is overlapped with the diffuser plate 14, and the first buffer member 16 is arranged on the side of the diaphragm 12 away from the diffuser plate 14, so that the diffuser plate 14 and the first buffer member 16 can jointly limit the movement of the diaphragm 12 in the first direction X. By arranging a first through hole 1121 and a mounting groove 1122 at one end of the back plate 11, a positioning hole 121 is arranged in the diaphragm 12, at least a portion of the diaphragm 12 is accommodated in the mounting groove 1122, the limiting member 12 is fixed to the back plate 11, and at least a portion of the limiting member 12 passes through the first through hole 1121 and the positioning hole 121 along the first direction X, thereby limiting the movement of the diaphragm 12 along the second direction Y and the third direction Z, thereby achieving the limitation of the diaphragm 12, without using adhesive to fix the diaphragm 12 to the diffuser plate 14, reducing the risk of the diaphragm 12 having a film arch or falling off.

[0052] The present invention further provides a display device 100 embodiment, see Fig. 9 and Fig.10 The display device 100 includes a screen assembly 2 and the above-mentioned backlight module 1, and the screen assembly 2 is fixed to the surface of the bending portion 112 away from the membrane 12, wherein the surface of the bending portion 112 away from the membrane 12 is composed of the first surface 11251 of the second plate 1125.

[0053] In some embodiments, the display device 100 also includes a second buffer member 3, which is disposed between the screen assembly 2 and the first surface 11251. The second buffer member 3 is respectively bonded and fixed to the screen assembly 2 and the first surface 11251, thereby achieving fixation between the screen assembly 2 and the second plate 1125, and can form a buffer between the screen assembly 2 and the bending portion 112, which is beneficial to protecting the screen assembly 2.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A backlight module, characterized in that: include: A back plate, one end of which is provided with a first through hole and a mounting groove, wherein the first through hole is connected to the mounting groove; A diffusion plate, at least partially received in the mounting groove, the diffusion plate being fixed to the back plate; A diaphragm is stacked with the diffuser plate, at least a portion of the diaphragm is received in the mounting groove, and the diaphragm is provided with a positioning hole; A first buffer is arranged on a side of the diaphragm away from the diffuser plate, an end of the first buffer away from the diaphragm is in contact with the back plate, the diffuser plate and the first buffer are used together to limit the movement of the diaphragm along a first direction, and the first direction is parallel to the direction in which the diaphragm and the diffuser plate are stacked; A limit member is fixed to the back plate, and at least a portion of the limit member is penetrated through the first through hole and the positioning hole along a first direction to limit the movement of the diaphragm along a second direction and a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

2. The backlight module according to claim 1, characterized in that: A bending portion is formed at one end of the back plate, the first through hole and the mounting groove are both arranged at the bending portion, and the limiting member is fixed to the bending portion.

3. The backlight module according to claim 2, characterized in that: The limiting member is formed with an abutting portion and a first clamping portion, the abutting portion abuts against the first surface of the bending portion, and the first clamping portion abuts against the second surface of the bending portion, wherein the first through hole passes through the first surface and the second surface, and the second surface constitutes a partial boundary of the mounting groove.

4. The backlight module according to claim 3, characterized in that: The first clamping portion is formed with a first connecting section and a first clamping section, one end of the first clamping section is connected to the first connecting section, and the first clamping section abuts against the second surface.

5. The backlight module according to claim 3, characterized in that: The limiting member is further formed with a second clamping portion. Along the second direction, the second clamping portion and the first clamping portion are respectively located on both sides of the abutting portion, and the second clamping portion abuts against the second surface.

6. The backlight module according to claim 2, characterized in that: The limiting member is formed with an abutting portion, and the abutting portion is bonded and fixed to the bending portion.

7. The backlight module according to any one of claims 2 to 6, characterized in that: The bending portion is bent to form a first plate body, a bending plate and a second plate body, the bending plate is arranged at one end of the first plate body, the second plate body is arranged at an end of the bending plate away from the first plate body, the first plate body, the bending plate and the second plate body are jointly enclosed to form the mounting groove, the first through hole is arranged in the second plate body, and the diaphragm is fixed to the second plate body.

8. The backlight module according to claim 7, characterized in that: The first plate body is provided with a second through hole, the second through hole is communicated with the mounting groove, and at least a part of the limiting member is inserted into the second through hole.

9. A display device, characterized in that: It comprises a screen assembly and the backlight module as claimed in any one of claims 1 to 8, wherein the screen assembly is fixed to the surface of the back plate facing away from the membrane.

10. The display device according to claim 9, characterized in that: The display device includes a second buffer member, which is arranged between the screen assembly and the back plate, and is fixed to the screen assembly and the back plate respectively.

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