Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module comprises a back plate and an optical film. The back plate comprises a bottom wall and a side wall which is connected with the bottom wall in a bending mode, and the bottom wall and the side wall form a containing space in a surrounding mode. The optical film is arranged in the containing space, at least one peripheral side of the optical film is provided with a lug, and the lug extends out of the containing space and is connected and fixed to the peripheral side of the side wall in a bent mode. According to the backlight module, the convex lugs are arranged on the peripheral side of the optical film and extend out of the containing space, meanwhile, the convex lugs are bent and connected to the peripheral side of the side wall, and then the convex lugs are fixed to the side wall. Therefore, firstly, the fixing effect of the optical film and the back plate can be improved, secondly, even if the optical film is separated from the back plate, the bent convex lugs can be clamped on the back plate, and the optical film is prevented from moving. In addition, the convex lugs are fixed with the back plate after being bent, so that the operation difficulty can be reduced, and the situation that the optical performance is influenced due to the fact that auxiliary materials such as bonding pieces are bonded to the optical film subsequently is avoided.

Description

Technical Field

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

[0002] The backlight module includes a variety of components, such as a backplane and an optical film disposed in the backplane, and the optical film usually needs to be fixed to the backplane. With the diversified development of the backlight module market, the backplane for fixing the optical film inside the backlight module has diversified development. For example, in one embodiment, a hole can be opened on the optical film and rivet columns can be added to the backplane, but this solution has difficulty in chip removal during optical film processing and the risk of shortening the life of the die cutter. At the same time, the addition of rivet columns to the backplane increases the cost. In another embodiment, a hole can be opened on the optical film, and a notch can be opened on the backplane at the same time, and the optical film is hung in the notch, but this solution requires the middle frame to be wide enough and cannot meet the requirements of ultra-narrow frame design. In another embodiment, a lug can be set on the optical film, a notch can be opened on the backplane, and the lug and the backplane can be pasted with auxiliary materials. However, this solution is difficult to operate, and it is easy to paste the auxiliary materials onto the optical film, and there is a risk of the film falling off during mechanical experiments. Utility Model Content

[0003] In view of this, the present application provides a backlight module, the backlight module comprising:

[0004] A back plate, comprising a bottom wall and a side wall bent and connected to the bottom wall, wherein the bottom wall and the side wall are arranged to form a receiving space;

[0005] The optical film is arranged in the receiving space. At least one peripheral side of the optical film is provided with a lug, which extends out of the receiving space and is bent, connected and fixed to the outer peripheral side of the side wall.

[0006] The backlight module provided by the present application is provided with a lug on the peripheral side of the optical film, and the lug is extended outside the receiving space, and the lug is bent and connected to the peripheral side of the side wall, and then the lug is fixed to the side wall. In this way, the fixing effect of the optical film and the back plate can be improved firstly, and secondly, even if the optical film and the back plate are separated, the bent lug can be clamped on the back plate to prevent the optical film from moving. In addition, the difficulty of operation can be reduced by bending the lug and then fixing it to the back plate, and it is avoided that the auxiliary materials such as adhesives are subsequently pasted to the optical film, thereby affecting the optical performance.

[0007] Wherein, the side wall is provided with a notch penetrating the outer circumference and the inner circumference of the side wall, and the lug extends to the outside of the receiving space through the notch.

[0008] The notch also passes through a side of the side wall away from the bottom wall, and two limiting protrusions are provided on the side of the side wall away from the bottom wall, and the two limiting protrusions are located on opposite sides of the notch.

[0009] Among them, the lug includes an extension portion and a bent portion connected to the extension portion, the extension portion is arranged in the receiving space, and the bent portion is arranged outside the receiving space and fixed to the outer peripheral side of the side wall; a receiving groove is provided on the outer peripheral side of the side wall, and at least part of the bent portion is arranged in the receiving groove.

[0010] Wherein, a saddle stitch line consisting of a plurality of holes is provided at the bending connection between the extension portion and the bending portion.

[0011] Wherein, the saddle seam meets at least one of the following conditions:

[0012] The density of the plurality of holes in the saddle stitch line is 20%-30%;

[0013] Each hole has a long axis of 0.5 mm to 1.5 mm, a short axis of 0.1 mm to 1 mm, and an area of ​​0.05 mm. 2 -1.5mm 2 .

[0014] The backlight module further comprises an adhesive member, one end of which is bonded to a side of the bottom wall away from the receiving space, and the other end of which is bent and connected to the outer peripheral side of the side wall and bonded to the bent portion.

[0015] Wherein, the other end of the bonding member is also bonded to the side wall.

[0016] The backlight module further comprises a middle frame mounted on the outer peripheral side of the side wall, and a side of the middle frame close to the side wall is provided with an escape groove, and the escape groove is used to accommodate at least a portion of the lug bent and connected outside the accommodation space.

[0017] A second aspect of the present application provides a display device, which includes a display panel and a backlight module as provided in the first aspect of the present application.

[0018] The display device provided in the second aspect of the present application can reduce the difficulty of operation and the risk of optical film falling off by adopting the backlight module provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0020] Figure 1 FIG. 1 is a schematic diagram of the three-dimensional structure of a backlight module in one embodiment of the present application.

[0021] Figure 2 for Figure 1 An exploded view of the backlight module is shown.

[0022] Figure 3 is Figure 1 a partial cross-sectional schematic view of the backlight module shown in the figure.

[0023] Figure 4 is a partial three-dimensional structural schematic view of the backplane in an embodiment of the present application.

[0024] Figure 5 is a partial front view of the backplane in an embodiment of the present application.

[0025] Figure 6 is a partial three-dimensional structural schematic view of the optical film in an embodiment of the present application.

[0026] Figure 7 is a partial three-dimensional structural schematic view of the backplane in another embodiment of the present application.

[0027] Figure 8 is a partial cross-sectional schematic view of the backlight module in another embodiment of the present application.

[0028] Figure 9 is a partial front view of the backlight module in an embodiment of the present application.

[0029] Figure 10 is a three-dimensional structural schematic view of the backlight module in another embodiment of the present application.

[0030] Figure 11 is Figure 10 an exploded view of the backlight module shown in the figure.

[0031] Figure 12 is Figure 10 a partial cross-sectional schematic view of the backlight module shown in the figure.

[0032] Figure 13 is an exploded view of the display device in an embodiment of the present application.

[0033] Reference numeral description:

[0034] Backlight module - 1, Display panel - 2, Display device - 3, Backplane - 10, Receiving space - 100, Bottom wall - 11, Positioning mark - 110, Side wall - 12, Notch - 120, Limiting projection - 121, Accommodating groove - 122, Light source - 20, Optical film - 30, Lug - 40, Extension - 41, Bending part - 42, Stitching line - 43, Hole - 430, Bonding member - 50, Middle frame - 60, Avoidance groove - 600. Detailed implementation manners

[0035] The following are the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

[0036] In view of this, in order to solve the above technical problems, please refer to Figures 1-3 , Figure 1 which is a schematic three-dimensional structure diagram of a backlight module in an embodiment of the present application. Figure 2 is Figure 1 an exploded view of the backlight module shown. Figure 3 is Figure 1 a partial cross-sectional schematic diagram of the backlight module shown. This embodiment provides a backlight module 1, and the backlight module 1 includes a back plate 10 and an optical film 30. The back plate 10 includes a bottom wall 11 and a side wall 12 bent and connected from the bottom wall 11. The bottom wall 11 and the side wall 12 enclose a receiving space 100. The optical film 30 is disposed in the receiving space 100, and at least one peripheral side of the optical film 30 is provided with a lug 40. The lug 40 extends outside the receiving space 100 and is bent and connected and fixed to the outer peripheral side of the side wall 12.

[0037] The backlight module 1 is one of the important components in the display device 3, mainly used for emitting light, and then transmitting the light to the display panel 2 to finally form an image. The backlight module 1 is composed of multiple components. The back plate 10 is the basic component of the backlight module 1, mainly used for carrying and protecting the components. The back plate 10 is composed of a bottom wall 11 and side walls 12 bent and connected from the periphery of the bottom wall 11. For example, when the bottom wall 11 is rectangular, four sides of the rectangular bottom wall 11 are each bent and connected to a side wall 12, and two adjacent side walls 12 are connected to each other. In this way, the bottom wall 11 and the multiple side walls 12 can enclose a receiving space 100, and many components of the backlight module 1 can be installed in the receiving space 100, such as a backlight source 20 or a side light source 20.

[0038] An optical film 30 is further provided above the light source 20. The optical film 30 is also disposed in the receiving space 100 of the back plate 10. The optical film 30 is used for further processing the light emitted by the light source 20 to improve the light output effect. The optical film 30 mentioned in this embodiment and the following text can be generally understood as a film with optical functions, which can be called an optical film 30. Narrowly, it can be understood as a diffusion film, a polarizing film, an antireflection film, etc. In this embodiment and the following text, only an antireflection film is used for illustrative purposes.

[0039] The optical film 30 needs to be fixed to the back plate 10. From the above, it can be seen that various existing fixing methods have their corresponding problems. In this embodiment, lugs 40 can be provided on at least one peripheral side of the optical film 30, and the number of lugs 40 on each side is not limited, and can be one or more. The lugs 40 and the optical film 30 can be of an integral structure or a split structure. In this embodiment, only the case where the lugs 40 and the optical film 30 are of an integral structure is schematically illustrated.

[0040] In this embodiment, the lugs 40 can be extended outside the receiving space 100, that is, outside the back plate 10. At this time, the optical film 30 is located inside the back plate 10, a part of the lugs 40 is also located inside the back plate 10, and the rest extends outside the back plate 10. On this basis, the lugs 40 outside the back plate 10 can be bent, so that the lugs 40 outside the back plate 10 and the lugs 40 and the optical film 30 inside the back plate 10 are arranged at an angle. The angle of bending is not limited in this embodiment. For example, it can be vertically arranged or not vertically arranged. After the lugs 40 are bent, they are located on the outer peripheral side of the side wall 12, and then the lugs 40 can be fixed to the side wall 12, so as to realize the fixation of the optical film 30 and the back plate 10. The specific fixing method will be introduced in detail later in this application.

[0041] Compared with the related art, through the above settings in this embodiment, the acting force between the lugs 40 and the bracket of the back plate 10 can be reduced, the fixing effect of the optical film 30 and the back plate 10 can be improved, and the risk of cracking between the lugs 40 and the back plate 10 can be reduced. Secondly, since some display devices 3 such as monitors and TVs are usually vertical during use, that is, the optical film 30 and the back plate 10 are vertically placed. Therefore, when the lugs 40 are located above the optical film 30 and the back plate 10, even if the optical film 30 and the back plate 10 are separated, the bent lugs 40 can be clamped on the back plate 10 to prevent the optical film 30 from falling due to gravity. And even if the optical film 30 and the back plate 10 are horizontally placed, the lugs 40 can prevent the optical film 30 from moving by being clamped to the back plate 10, and the risk of film detachment and movement can be reduced compared with the film limiting method in the related art. In addition, in the related art, the back plate 10 and the lugs 40 are directly pasted with glue, and it is difficult for the operator to master the degree of gluing, and it is easy to stick the excess glue to the optical film 30, thereby affecting the optical performance. In this embodiment, by bending the lugs 40, it is only necessary not to exceed the bent part when gluing, which is convenient for the operator to operate.

[0042] In summary, the backlight module 1 provided by this embodiment has no difference in the manufacturing process from the related art, and there is no additional cost increase in terms of cost. It can solve the problems that the optical film 30 is difficult to assemble during the manufacturing process, and the optical film 30 adheres to the edge abnormally. At the same time, it can solve the problems of abnormal sliding caused by film displacement during the mechanical experiment process and abnormal light leakage at the edge of the large viewing angle visual effect.

[0043] Please refer to Figures 3-4 , Figure 4 , which is a partial three - dimensional structural schematic diagram of the backplane in an embodiment of the present application. In this embodiment, the side wall 12 is provided with a notch 120 penetrating the outer peripheral side and the inner peripheral side of the side wall 12, and the lug 40 extends to the outside of the receiving space 100 through the notch 120.

[0044] In this embodiment, a through notch 120 can be opened on the inner and outer peripheral sides of the side wall 12. Here, the inner peripheral side of the side wall 12 refers to the side of the side wall 12 close to the receiving space 100, and the outer peripheral side of the side wall 12 refers to the side of the side wall 12 facing away from the receiving space 100. The outer peripheral side of the side wall 12 can also be understood as the outer surface of the side wall 12. By opening the notch 120 on both the inner and outer sides of the side wall 12, the lug 40 can extend to the outside of the receiving space 100 through the notch 120, reducing the difficulty of the lug 40 extending outside the side wall 12.

[0045] Please refer to Figure 5 , Figure 5 , which is a partial front view of the backplane in an embodiment of the present application. In this embodiment, the notch 120 also penetrates the side of the side wall 12 facing away from the bottom wall 11, and two limiting protrusions 121 are provided on the side of the side wall 12 facing away from the bottom wall 11, and the two limiting protrusions 121 are located on opposite sides of the notch 120.

[0046] In addition to penetrating the inner and outer sides of the side wall 12, the notch 120 can also penetrate the side of the side wall 12 facing away from the bottom wall 11, that is, the notch 120 can also penetrate the top surface of the side wall 12. At this time, the notch 120 penetrates three surfaces of the side wall 12. This facilitates directly placing the lug 40 at the notch 120 through the upper opening when installing the optical film 30. This not only facilitates the mutual cooperation between the lug 40 and the notch 120, but also has a positioning effect. When the operator finds the notch 120, the lug 40 can be directly placed at the notch 120, thereby positioning the optical film 30.

[0047] In addition, in this embodiment, two limiting protrusions 121 can also be provided on the side of the side wall 12 facing away from the bottom wall 11, that is, above the side wall 12, and the two limiting protrusions 121 are arranged on opposite sides of the notch 120. In this way, the positioning effect can be further improved by using the two limiting protrusions 121 on both sides. And whether during installation or when the optical film 30 falls off, the limiting protrusions 121 can be used to prevent the optical film 30 from exceeding the side wall 12, so that the optical film 30 is always restricted within the backplane 10.

[0048] Optionally, since the lug 40 is bent in this embodiment, the length of the bent portion of the lug 40 can be increased compared to the length of the lug 40 in the related art. Correspondingly, the size of the notch 120 on the side wall 12 in the back plate 10 can also be increased accordingly.

[0049] Please refer to Figure 3 , Figures 6-7 , Figure 6 which is a partial three-dimensional structural schematic diagram of an optical film in an embodiment of the present application. Figure 7 which is a partial three-dimensional structural schematic diagram of the back plate in another embodiment of the present application. In this embodiment, the lug 40 includes an extension portion 41 and a bent portion 42 that bends and connects the extension portion 41. The extension portion 41 is disposed in the receiving space 100, and the bent portion 42 is disposed outside the receiving space 100 and fixed to the outer peripheral side of the side wall 12. A receiving groove 122 is provided on the outer peripheral side of the side wall 12, and at least a part of the bent portion 42 is disposed in the receiving groove 122.

[0050] The lug 40 can be divided into an extension portion 41 and a bent portion 42. From the above, it can be seen that the lug 40 extends from the inside of the receiving space 100 to the outside of the receiving space 100 and is bent. Therefore, a part of the lug 40 is disposed inside the receiving space 100, and this part can be called the extension portion 41. The remaining part extends out of the receiving space 100 and is bent outside the receiving space 100, and this part can be called the bent portion 42. The extension portion 41 and the bent portion 42 are bent and connected, so that the bent portion 42 is fixed to the outer peripheral side of the side wall 12. Based on this, a receiving groove 122 can be opened on the outer peripheral side of the side wall 12, and at least a part of the bent portion 42 is disposed in the receiving groove 122, which can reduce the height of the bent portion 42 protruding from the side wall 12, thereby facilitating the subsequent assembly between the middle frame 60 and the back plate 10.

[0051] Please refer to Figure 6 again. In this embodiment, a stitch line 43 formed by a plurality of holes 430 is provided at the bent connection between the extension portion 41 and the bent portion 42.

[0052] From the above, it can be seen that the extension portion 41 is bent and connected to the bent portion 42. Therefore, a bent connection, that is, a bent fold line, will be formed between the extension portion 41 and the bent portion 42. In this embodiment, a stitch line 43 can be opened at this bent connection. The stitch line 43 can be understood as being composed of through holes arranged in an array. In this embodiment, only one row of through holes is provided, and a plurality of porous through holes are provided at intervals along the extension direction of the bent connection for illustration. The setting of the stitch line 43 can facilitate the bending of the bent portion 42 and reduce the internal stress of the lug 40 after the bent portion 42 is bent.

[0053] Optionally, the stitch line 43 faces the bottom wall 11 of the notch 120.

[0054] In this embodiment, the stitch line 43 satisfies at least one of the following conditions: In the first case, the density of the plurality of holes 430 in the stitch line 43 is 20%-30%. In the second case, the major axis of each hole 430 is 0.5 mm - 1.5 mm, the minor axis is 0.1 mm - 1 mm, and the area is 0.05 mm 2 -1.5 mm 2 .

[0055] In the first case, the density of the plurality of holes 430 is 20%-30%. The density of the plurality of holes 430 can be understood as the ratio of the sum of the inner diameters of the plurality of holes 430 to the length of the stitch line 43 along the extension direction of the stitch line 43. When the density of the plurality of holes 430 is too small, for example, less than 20%, the number of holes 430 is too small at this time, and / or the area is too small, and the effect of reducing the bending difficulty of the bent portion 42 is not obvious, and the effect of reducing the internal stress is not obvious either. When the density of the plurality of holes 430 is too large, for example, greater than 30%, the number of holes 430 is too large at this time, and / or the area is too large, which will cause the stitch line 43 to be easily broken.

[0056] Optionally, in this embodiment, one hole is left for every three holes cut, that is, a hole 430 is opened every three unit distances. At this time, the density of the plurality of holes 430 is 25%.

[0057] In the second case. The shape of each hole 430 can be rectangular, circular, elliptical, racetrack-shaped, etc. In this embodiment, only the rectangle is used for illustrative purposes. And the major axis of each hole 430 is 0.5 mm - 1.5 mm, the minor axis is 0.1 mm - 1 mm, that is, the length is 0.5 mm - 1.5 mm, the width is 0.1 mm - 1 mm, and the area is 0.05 mm 2 -1.5 mm 2 . Similar to the first case, when the length, width, and area of each hole 430 are too small, the effect of reducing the bending difficulty of the bent portion 42 is not obvious, and the effect of reducing the internal stress is not obvious either. When the length, width, and area of each hole 430 are too large, the stitch line 43 is easily broken.

[0058] Optionally, the length of each hole 430 is 1 mm, the width is 0.5 mm, and the area is 0.5 mm 2 .

[0059] It should be noted that the stitch line 43 in this embodiment may only satisfy the first case or only satisfy the second case, or satisfy both the first case and the second case at the same time.

[0060] Please refer to Figure 8 , Figure 8A partial cross-sectional view of the backlight module in another embodiment of the present application. In this embodiment, the backlight module 1 further includes an adhesive member 50. One end of the adhesive member 50 is bonded to the side of the bottom wall 11 facing away from the accommodation space 100, and the other end is bent and connected to the outer peripheral side of the side wall 12 and bonded to the bent portion 42.

[0061] As can be seen from the above, after the lug 40 is bent, it can be fixed to the side wall 12, thereby realizing the fixation of the optical film 30. There are various situations for the fixation method. In one embodiment, glue can be used. The glue is coated on the bent part of the lug 40, so that when the lug 40 is bent, it can be bonded to the side wall 12. In this embodiment, an adhesive member 50 can also be added. The adhesive member 50 is a single-sided adhesive tape. One end of the adhesive member 50 is bonded to the side of the bottom wall 11 facing away from the accommodation space 100, that is, one end of the adhesive member 50 is bonded to the lower side of the bottom wall 11. Subsequently, the adhesive member 50 is wound around to the outer peripheral side of the side wall 12 and the other end is bonded to the bent portion 42. In this way, the back plate 10 and the lug 40 of the optical film 30 can be fixedly connected together by the adhesive member 50. And because the lug 40 is bent, it can prevent the other end of the adhesive member 50 from being overly pasted onto the optical film 30.

[0062] Optionally, a positioning mark 110 can be provided below the bottom wall 11 to facilitate the accurate bonding of one end of the adhesive member 50 below the bottom wall 11.

[0063] Optionally, the adhesive member 50 includes but is not limited to an acetate tape.

[0064] Please refer to Figure 9 , Figure 9 A partial front view of the backlight module in one embodiment of the present application. In this embodiment, in addition to bonding to the bent portion 42, the other end of the adhesive member 50 can also be bonded to the side wall 12 to further improve the bonding effect between the lug 40 and the optical film 30.

[0065] Please refer to Figures 10-12 , Figure 10 A three-dimensional structural view of the backlight module in another embodiment of the present application. Figure 11 For Figure 10 the exploded view of the backlight module shown. Figure 12 For Figure 10 A partial cross-sectional view of the backlight module shown. In this embodiment, the backlight module 1 further includes a middle frame 60 installed on the outer peripheral side of the side wall 12. An avoidance groove 600 is provided on the side of the middle frame 60 close to the side wall 12. The avoidance groove 600 is used to accommodate at least part of the lug 40 bent and connected outside the accommodation space 100.

[0066] In addition to the above components, the backlight module 1 may further include a middle frame 60, which is usually installed on the back plate 10, specifically on the outer peripheral side of the middle side wall 12 of the back plate 10. From the above description, it can be seen that after the lug 40 is bent, it is fixed on the outer peripheral side of the side wall 12, which may cause the lug 40 to protrude from the side wall 12, making this place not flat and having a protrusion. Therefore, an avoidance groove 600 may be correspondingly formed on the side of the middle frame 60 close to the side wall 12, and the avoidance groove 600 corresponds to the bent lug 40. When the middle frame 60 is installed on the side wall 12, the avoidance groove 600 can accommodate the bent part of the lug 40, so as to avoid this part of the lug 40 and facilitate the tight assembly of the middle frame 60 and the back plate 10.

[0067] In summary, the backlight module 1 provided by the present application provides a novel design for limiting the optical film 30. By adding a stitching line 43 to the lug 40 of the optical film 30, the lug 40 is bent during the assembly operation. While the lug 40 is mechanically fixed by the middle frame 60 near the back plate 10, the sticking of an acetic acid tape convenient for operation is added.

[0068] Please refer to Figure 13 , Figure 13 , which is an exploded view of the display device in an embodiment of the present application. This embodiment also provides a display device 3, which includes a display panel 2 and the backlight module 1 provided in the above embodiment of the present application.

[0069] The display device 3 referred to in the present application mainly refers to a device with a display function, such as a mobile phone, a television (TV), a monitor (MNT), a notebook computer (NB), etc., all of which are applicable. In this embodiment, only the MNT is used for illustrative purposes.

[0070] The display device 3 mainly includes a display panel 2 and a backlight module 1. The display panel 2 is installed above the backlight module 1, and the backlight module 1 is used to provide a light source 20 for the display panel 2. The display panel 2 is provided with structures such as a driving IC, a TFT, a liquid crystal, and a filter. Through the above structures, a picture can be finally formed. For the display device 3 provided in this embodiment, by adopting the backlight module 1 provided in the above embodiment of the present application, the operation difficulty can be reduced and the risk of the optical film 30 falling off can be reduced.

[0071] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0072] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0073] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a connection, a detachable connection, or integrated. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] The above has introduced in detail the content provided by the embodiments of this application, and has elaborated and explained the principles and embodiments of this application. These explanations are only used to help understand the method and its core idea of this application. However, the content of this specification should not be construed as a limitation to this application. Those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. These modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies.

Claims

1. A backlight module, characterized in that: The backlight module comprises: A back plate, comprising a bottom wall and a side wall bent and connected to the bottom wall, wherein the bottom wall and the side wall are arranged to form a receiving space; The optical film is arranged in the receiving space. At least one peripheral side of the optical film is provided with a lug, which extends out of the receiving space and is bent, connected and fixed to the outer peripheral side of the side wall.

2. The backlight module according to claim 1, characterized in that: The side wall is provided with a notch penetrating the outer circumference and the inner circumference of the side wall, and the lug extends to the outside of the receiving space through the notch.

3. The backlight module according to claim 2, characterized in that: The notch also passes through a side of the side wall away from the bottom wall. Two limiting protrusions are provided on the side of the side wall away from the bottom wall. The two limiting protrusions are located on opposite sides of the notch.

4. The backlight module according to claim 1, wherein: The lug includes an extension portion and a bent portion bent and connected to the extension portion, the extension portion is arranged in the receiving space, the bent portion is arranged outside the receiving space and fixed to the outer peripheral side of the side wall; a receiving groove is arranged on the outer peripheral side of the side wall, and at least part of the bent portion is arranged in the receiving groove.

5. The backlight module according to claim 4, characterized in that: A saddle stitch line consisting of a plurality of holes is provided at a bent connection between the extension portion and the bent portion.

6. The backlight module according to claim 5, characterized in that: The saddle stitch line satisfies at least one of the following conditions: The density of the plurality of holes in the saddle stitch line is 20%-30%; The long axis of each hole is 0.5mm-1.5mm, the short axis is 0.1mm-1mm, and the area is 0.05mm 2 -1.5mm 2 .

7. The backlight module according to claim 4, characterized in that: The backlight module further comprises a bonding member, one end of which is bonded to a side of the bottom wall away from the receiving space, and the other end of which is bent and connected to the outer peripheral side of the side wall and bonded to the bent portion.

8. The backlight module according to claim 7, characterized in that: The other end of the bonding member is also bonded to the side wall.

9. The backlight module according to claim 1, wherein: The backlight module further comprises a middle frame mounted on the outer peripheral side of the side wall. A side of the middle frame close to the side wall is provided with an escape groove, and the escape groove is used to accommodate at least a portion of the lug bent and connected outside the accommodation space.

10. A display device, characterized in that: The display device comprises a display panel and a backlight module as claimed in any one of claims 1 to 9.

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