Backlight module, display module and display equipment

Abstract

The embodiment of the utility model discloses a backlight module, a display module and display equipment, the backlight module comprises a back plate and a frame body structure, and a containing cavity is formed in the side wall of the back plate. The frame body structure comprises a first frame body and a second frame body, the second frame body comprises an outer frame part and a conductive part, the first frame body surrounds the periphery of the back plate, the outer frame part is arranged on the side, away from the side wall, of the first frame body, the conductive part is arranged on the side, close to the side wall, of the outer frame part, and the conductive part penetrates through the first frame body and extends into the containing cavity. The back plate and the outer frame part are both conductive, and the conductive part is configured to conduct charges on the outer frame part to the back plate. According to the embodiment of the invention, the conductive second frame body and the conductive first frame body are integrated, so that the assembly efficiency of the backlight module can be improved; and secondly, the conductive part penetrates through the first frame body and extends into the accommodating cavity of the back plate, so that charges on the outer frame part are conducted to the back plate through the conductive part, the frame width of the backlight module is reduced, and the electrostatic protection performance is improved.

Description

TECHNICAL FIELD

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

[0002] The current In-Plane Switching (IPS) 3-side frameless liquid crystal display module is limited by the characteristics of the IPS screen itself, and has poor electrical protection ability, so an electrostatic protection scheme needs to be designed on the side of the backlight module. The conventional scheme is to attach a conductive cloth to the two corners of the top side of the backlight module, the conductive cloth covers the side of the backlight module, and will be lapped onto the back plate, so that the electric charge can be grounded to the back plate through the conductive cloth, thereby protecting the liquid crystal display screen.

[0003] In the research and practice process of the prior art, the inventors of the present application found that the traditional scheme has the following disadvantages: ① The conductive cloth involves additional manual attachment cost; ② The corner attached with the conductive cloth can only protect the thinnest corner of the display screen, and cannot form protection on the side; if the conductive cloth is attached to the whole side, the operation difficulty will also increase; ③ The conductive cloth is easy to fall off in transportation or hot and humid environment. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a backlight module, a display module and a display device, which can improve the assembly efficiency and electrostatic protection performance.

[0005] The embodiments of the present application provide a backlight module, which comprises:

[0006] A back plate comprising a base and a side wall, the side wall is arranged on the peripheral area of the base, and a containing cavity is arranged on the side wall;

[0007] A frame structure comprising a first frame and a second frame, the second frame comprises an outer frame part and a conductive part, the first frame surrounds the outer periphery of the back plate, the outer frame part is arranged on the side of the first frame away from the side wall, the conductive part is arranged on the side of the outer frame part close to the side wall, and the conductive part penetrates through the first frame and extends into the containing cavity;

[0008] Wherein, the back plate and the outer frame part have electrical conductivity, and the conductive part is configured to conduct the electric charge on the outer frame part to the back plate.

[0009] Optionally, in some embodiments of the present application, the conductive part is a metal spring, the conductive part includes a first sub-part and a second sub-part, the first sub-part is arranged in the accommodating cavity, the first sub-part is connected to the second sub-part away from the base, part of the second sub-part is arranged in the accommodating cavity, and part of the second sub-part is fixedly arranged in the first frame body, and the second sub-part is obliquely arranged based on a plane in which the base is located.

[0010] Optionally, in some embodiments of the present application, the first sub-part has a minimum distance d1 of 0 millimeter≤d1≤0.1 millimeter to the inner wall of the accommodating cavity.

[0011] Optionally, in some embodiments of the present application, in a direction perpendicular to the plane in which the base is located, the inner wall of the accommodating cavity includes a first inner wall away from the base, and the first sub-part has the minimum distance to the first inner wall away from the base.

[0012] Optionally, in some embodiments of the present application, in a direction parallel to the plane in which the base is located, the accommodating cavity penetrates through the side wall.

[0013] Optionally, in some embodiments of the present application, in a direction parallel to the plane in which the base is located, the width of the accommodating cavity is smaller than the width of the side wall, and an end of the first sub-part away from the outer frame part is in contact with the inner wall of the accommodating cavity.

[0014] Optionally, in some embodiments of the present application, the conductive part further includes a third sub-part and a bending sub-part, the outer frame part, the bending sub-part, the third sub-part and the second sub-part are sequentially connected, the bending sub-part is connected to the end of the outer frame part, the third sub-part is arranged on the back of the outer frame part through the bending sub-part, and part of the bending sub-part and the third sub-part are fixed in the first frame body.

[0015] Optionally, in some embodiments of the present application, in the backlight module in a top view, the extension length of the bending sub-part is equal to the extension length of the outer frame part.

[0016] Optionally, in some embodiments of the present application, the conductive part and the outer frame part are an integral connection structure, and the first frame body and the second frame body are configured to be fixedly connected in a two-shot injection manner.

[0017] Optionally, in some embodiments of the present application, the outer frame part covers the side of the first frame body away from the side wall, and the outer frame part is configured as an appearance decoration of a display device.

[0018] Optionally, in some embodiments of the present application, the base and the side wall form a placement slot, and the backlight module comprises an optical assembly arranged in the placement slot.

[0019] The first frame comprises a support part and a side plate part surrounding the periphery of the side wall, the support part is connected to the side plate part near the placement slot and is located on the side of the side wall away from the base, and the support part is configured to support the display panel.

[0020] The side of the support part near the side wall is provided with a limiting slot, and part of the side wall is arranged in the limiting slot.

[0021] Correspondingly, the present application also provides a display module comprising a display panel and a backlight module as described in any one of the above embodiments, and the display panel is arranged on the light emitting side of the backlight module.

[0022] Correspondingly, the present application also provides a display device comprising a rear shell and a display module as described in any one of the above embodiments, and the rear shell is arranged on the side of the backlight module away from the display panel, and the outer frame part away from the display panel is overlapped on the rear shell.

[0023] The backlight module of the present application comprises a back plate and a frame structure, the back plate comprises a base and a side wall, the side wall is arranged on the peripheral area of the base, and a receiving cavity is arranged on the side wall. The frame structure comprises a first frame and a second frame, the second frame comprises an outer frame part and a conductive part, the first frame surrounds the periphery of the back plate, the outer frame part is arranged on the side of the first frame away from the side wall, the conductive part is arranged on the side of the outer frame part near the side wall, and the conductive part penetrates through the first frame and extends into the receiving cavity. The back plate and the outer frame part are both conductive, and the conductive part is configured to conduct the electric charge on the outer frame part to the back plate.

[0024] It can be understood that the present application integrates the conductive second frame and the first frame, which can improve the assembly efficiency of the backlight module. Secondly, the conductive part penetrates through the first frame and extends into the receiving cavity of the back plate, so that the electric charge on the outer frame part is conducted to the back plate through the conductive part, thereby reducing the frame width of the backlight module and improving the electrostatic protection performance. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a top view schematic diagram of the backlight module provided by the present application;

[0026] Figure 2 is Figure 1 a cross-sectional schematic diagram of the CC line in the middle;

[0027] Figure 3 is Figure 1 is a schematic view of a cross section of a RR line;

[0028] Figure 4 is another structural schematic view of a backlight module provided by an embodiment of the present application;

[0029] Figure 5 is a structural schematic view of a display module provided by an embodiment of the present application;

[0030] Figure 6 is a structural schematic view of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawings; and "inner" and "outer" are used in relation to the outline of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose a numerical requirement or establish an order.

[0032] The present application provides a backlight module, a display module and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0033] Please refer to Figures 1 to 3 The present application provides a backlight module 100, which includes a back plate 11 and a frame structure 12.

[0034] It should be noted that the backlight module 100 is described below as an example of a side-in backlight module, but is not limited thereto, for example, it can also be a direct backlight module.

[0035] The back plate 11 includes a base 111 and a side wall 112, and the side wall 112 is arranged on the peripheral edge region of the base 111. The side wall 112 is provided with a receiving cavity 10a.

[0036] The frame structure 12 includes a first frame 121 and a second frame 122. The second frame 122 includes an outer frame portion 12a and a conductive portion 12b. The first frame 121 is arranged around the outer periphery of the back plate 11, the outer frame portion 12a is arranged on the side of the first frame 121 away from the side wall 112, the conductive portion 12b is arranged on the side of the outer frame portion 12a close to the side wall 112, and the conductive portion 12b penetrates through the first frame 121 and extends into the accommodating cavity 10a.

[0037] The back plate 11 and the outer frame portion 12a are both conductive. The conductive portion 12b is configured to conduct the electric charge on the outer frame portion 12a to the back plate 11.

[0038] It can be understood that the backlight module 100 of the embodiment of the present application integrates the conductive second frame 122 and the first frame 121, which can improve the assembly efficiency of the backlight module 100. In addition, the conductive portion 12b penetrates through the first frame 121 and extends into the accommodating cavity 10a of the back plate 11, so that the electric charge on the outer frame portion 12a is conducted to the back plate 11 through the conductive portion 12b, thereby reducing the frame width of the backlight module 100 and improving the electrostatic protection performance.

[0039] It should be noted that the back plate 11 and the outer frame portion 12a are conductive, that is, the back plate 11 and the outer frame portion 12a have the ability to conduct electricity. For example, the back plate 11 and the outer frame portion 12a can each be formed of a conductive material, such as a metal, a metal alloy, a carbon-based conductive material, a metal oxide conductive material, or other conductive materials.

[0040] In addition, the material of the conductive portion 12b can also be a metal, a metal alloy, a carbon-based conductive material, a metal oxide conductive material, or other conductive materials. Optionally, the material of the conductive portion 12b can be the same as or different from the material of the outer frame portion 12a, as long as the two can realize a conductive path.

[0041] Optionally, in some embodiments of the present application, the conductive portion 12b is a metal spring. The conductive portion 12b includes a first sub-portion b1 and a second sub-portion b2. The first sub-portion b1 is arranged in the accommodating cavity 10a, and the first sub-portion b1 is connected to the side of the second sub-portion b2 away from the base 111. Part of the second sub-portion b2 is arranged in the accommodating cavity 10a, and part of the second sub-portion b2 is fixedly arranged in the first frame 121. The second sub-portion b2 is arranged obliquely based on the plane on which the base 111 is located.

[0042] It can be understood that the first sub-part b1 is arranged in the accommodating cavity 10a to realize the conductive path with the side wall 112, and the second sub-part b2 is fixed in the first frame body 121 to improve the stability of the connection between the first frame body 121 and the second frame body 122; secondly, the second sub-part b2 is arranged to be inclined relative to the bottom surface of the base 111, so that the second sub-part b2 forms an assembly guide slope, facilitating the assembly of the frame structure 12 and the back plate 11.

[0043] In addition, since the conductive part 12b is a metal spring, the second sub-part b2 has elastic potential energy. During the assembly of the frame structure 12 and the back plate 11, the second sub-part b2 will be deformed due to the extrusion interference of the side wall 112 of the back plate 11. At this time, the second sub-part b2 has a rebounding force. When the assembly of the frame structure 12 and the back plate 11 is completed, part of the first sub-part b1 and the second sub-part b2 will enter the accommodating cavity 10a of the side wall 112 due to the rebounding force of the second sub-part b2. At this time, the second sub-part b2 returns to its original state.

[0044] Optionally, in some embodiments of the present application, the first sub-part b1 has a minimum distance d1 of 0 mm to the inner wall of the accommodating cavity 10a, 0 mm≤d1≤0.1 mm.

[0045] It can be understood that the minimum distance d1 is between 0 mm and 0.1 mm, so that the conductive part 12b and the back plate 11 form a conductive path. The smaller the minimum distance d1, the stronger the conductive capacity of the conductive path. For example, when the minimum distance d1 is 0 mm, the first sub-part b1 contacts the inner wall of the accommodating cavity 10a, that is, the conductive part 12b contacts the side wall 112 of the back plate 11 to form a fast conductive channel. When the minimum distance d1 is greater than 0 mm, the first sub-part b1 has a gap with the inner wall of the accommodating cavity 10a. As long as the gap is not large, the electric charge in the conductive part 12b can break through the gap and conduct to the back plate 11.

[0046] Optionally, the minimum distance d1 can be 0 mm, 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm or 0.1 mm.

[0047] Optionally, in some embodiments of the present application, in the direction perpendicular to the plane where the base 111 is located, the inner wall of the accommodating cavity 10a includes a first inner wall a1 away from the base 111, and the end of the first sub-part b1 away from the base 111 has the minimum distance d1 to the first inner wall a1.

[0048] It can be understood that the end of the first sub-part b1 away from the base 111 forms a conductive channel with the first inner wall a1, which facilitates the assembly of the back plate 11 and the frame structure 12.

[0049] Optionally, in some embodiments of the present application, the accommodating cavity 10a penetrates the side wall 112 in a direction parallel to the plane on which the substrate 111 is located.

[0050] It can be understood that the accommodating cavity 10a penetrates the side wall 112, that is, the accommodating cavity 10a is a through hole, and the through hole can simplify the difficulty of forming the accommodating cavity 10a. Compared with the blind hole, the thickness of the side wall 112 can be smaller based on the requirement of accuracy, thereby reducing the frame width of the backlight module 100.

[0051] Optionally, in some embodiments of the present application, the second sub-portion b2 can be directly connected to the outer frame portion 12a.

[0052] Optionally, in some embodiments of the present application, the conductive portion 12b further comprises a third sub-portion b3 and a bending sub-portion b4, the outer frame portion 12a, the bending sub-portion b4, the third sub-portion b3 and the second sub-portion b2 are sequentially connected, the bending sub-portion b4 is connected to the end of the outer frame portion 12a, the third sub-portion b3 is arranged on the back of the outer frame portion 12a through the bending sub-portion b4, and part of the bending sub-portion b4 and the third sub-portion b3 are fixed in the first frame body 121.

[0053] It can be understood that the conductive portion 12b is provided with the third sub-portion b3 and the bending sub-portion b4, and part of the bending sub-portion b4 and the third sub-portion b3 are fixed in the first frame body 121, thereby increasing the fixed connection area of the conductive portion 12b and the first frame body 121, and improving the stability of the connection therebetween.

[0054] Secondly, based on the fact that the conductive portion 12b and the outer frame portion 12a are integrally connected, and the bending sub-portion b4 is connected to the end of the outer frame portion 12a, when the second frame body 122 is subjected to stamping forming, the risk that the front surface of the outer frame portion 12a is stolen and causes a gap in the appearance can be reduced.

[0055] Optionally, in some embodiments of the present application, in the backlight module 100 under the top view, the extension length of the bending sub-portion b4 is equal to the extension length of the outer frame portion 12a.

[0056] It can be understood that the bending sub-portion b4 is equal in length to the outer frame portion 12a, so that when the second frame body 122 is subjected to stamping forming, the risk that the front surface of the outer frame portion 12a is stolen and causes a gap in the appearance can be maximally reduced.

[0057] Optionally, in some embodiments of the present application, the first frame body 121 and the second frame body 122 are configured to be fixedly connected in a way of secondary injection molding.

[0058] It can be understood that the first frame 121 can be a plastic frame and the second frame 122 can be a metal frame, wherein the first frame 121 is formed by an injection molding process. Then the second frame 122 is fixedly connected with the first frame 121 by a secondary injection molding to provide stability of the connection and to reduce the frame width of the backlight module 100.

[0059] Optionally, in some embodiments of the present application, the outer frame portion 12a covers the entire side of the first frame 121 away from the side wall 112. The outer frame portion 12a is configured as an appearance decoration of the display device.

[0060] It can be understood that the display device can be a mobile terminal, a television or other display products. The embodiments of the present application reuse the outer frame portion 12a as the appearance decoration of the display device, which can not need to additionally set a decorative frame, thereby saving cost.

[0061] Optionally, in some embodiments of the present application, the base 111 and the side wall 112 form a placement slot 10b. The first frame 121 includes a support portion 21a and a side plate portion 21b surrounding the outer periphery of the side wall 112, and the support portion 21a is connected to the side of the side plate portion 21b close to the placement slot 10b and located on the side of the side wall 112 away from the base 111. The support portion 21a is configured to support the display panel.

[0062] The side of the support portion 21a close to the side wall 112 is provided with a limiting slot 11a, and part of the side wall 112 is arranged in the limiting slot 11a.

[0063] It can be understood that the limiting slot 11a is arranged to allow the side wall 112 of the back plate 11 to be inserted into the limiting slot 11a, thereby reducing the risk of relative movement of the back plate 11 and thinning the thickness of the backlight module 100.

[0064] Optionally, in some embodiments of the present application, the backlight module 100 includes an optical assembly 13 arranged in the placement slot 10b.

[0065] Optionally, in some embodiments of the present application, the optical assembly 13 includes a light source, an optical film 131, a light guide plate 132 and a reflective sheet 133, the light guide plate 132 is arranged on the reflective sheet 133, and the optical film 131 is arranged on the light guide plate 132.

[0066] It should be noted that if the backlight module 100 is a direct type backlight module, the optical assembly 13 can include a reflective sheet, a light source, a support column and an optical film.

[0067] Figure 4 FIG. 8 is another structural schematic view of the backlight module 100 according to an embodiment of the present application. In the embodiment shown in FIG. 8, the backlight module 100 includes a first frame 121 and a second frame 122. Figure 4In the following detailed description of the application, parts different from the parts of the above embodiments will be described to avoid redundant description.

[0068] Please refer to Figure 4 In some embodiments of the present application, the width k1 of the accommodating cavity 10a is less than the width k2 of the side wall 112 in the direction parallel to the plane on which the base 111 is located. The first sub-part b1 is in contact with the inner wall of the accommodating cavity 10a away from one end of the outer frame part 12a.

[0069] It should be noted that, compared with Figure 2 Corresponding embodiments, in Figure 4 Corresponding embodiments, the accommodating cavity 10a does not penetrate the side wall 112, avoiding the risk of light leakage.

[0070] Secondly, the first sub-part b1 is in contact with the inner wall of the accommodating cavity 10a away from one end of the outer frame part 12a, which increases the conductive path of the conductive part 12b and the back plate 11, and improves the stability of the conduction.

[0071] Please refer to Figure 5 Correspondingly, the present application also provides a display module 1000, which comprises a display panel 200 and a backlight module 100 as described in any one of the above embodiments, and the display panel 200 is arranged on the light-emitting side of the backlight module 100.

[0072] It should be noted that the structure of the backlight module 100 of the display module 1000 of the present application is similar or identical to that of the backlight module 100 of the above embodiments, and therefore will not be described here. For details, please refer to the description of Figures 1 to 4 .

[0073] Optionally, the display module 1000 further comprises a tape 201, and the tape 201 is arranged on the support part 21a. The display panel 200 is fixed on the backlight module 100 through the tape 201.

[0074] Among them, the display panel 200 is a liquid crystal display panel.

[0075] Please refer to Figure 6 Correspondingly, the present application also provides a display device P10, which comprises a rear shell 2000 and a display module 1000 as described in any one of the above embodiments, and the rear shell 2000 is arranged on the side of the backlight module 100 away from the display panel 200, and the outer frame part 12a is lapped on the rear shell 2000 away from the display panel 200.

[0076] It should be noted that the structure of the display module 1000 of the display device P10 of the present application is similar or identical to that of the display module 1000 of the above embodiments, and therefore will not be described here. For details, please refer to the description of Figures 1 to 5 .

[0077] Optionally, the display apparatus P10 can be applied to and used in various products, including, for example, a television, a notebook computer, a monitor, a billboard, an Internet of Things (IoT) device, and a portable electronic device including a mobile phone, a smart phone, a tablet personal computer, a mobile communication terminal, an electronic organizer, an electronic book, a portable multimedia player (PMP), a navigation, and an Ultra Mobile Personal Computer (UMPC).

[0078] In addition, the display apparatus P10 according to some embodiments can be applied to and used in a wearable device, including a smart watch, a watch phone, a glasses-type display, and a head-mounted display.

[0079] The backlight module 100 of the display apparatus P10 according to the embodiments of the present application includes a back plate 11 and a frame structure 12. The back plate 11 includes a base 111 and a side wall 112 disposed on a peripheral region of the base 111, and a receiving cavity 10a is disposed on the side wall 112. The frame structure 12 includes a first frame 121 and a second frame 122. The second frame 122 includes an outer frame portion 12a and a conductive portion 12b. The first frame 121 surrounds the outer periphery of the back plate 11. The outer frame portion 12a is disposed on a side of the first frame 121 away from the side wall 112. The conductive portion 12b is disposed on a side of the outer frame portion 12a close to the side wall 112. The conductive portion 12b penetrates the first frame 121 and extends into the receiving cavity 10a. The back plate 11 and the outer frame portion 12a are both electrically conductive. The conductive portion 12b is configured to conduct an electric charge on the outer frame portion 12a to the back plate 11.

[0080] It can be understood that the embodiments of the present application integrate the electrically conductive second frame 122 and the first frame 121, which can improve the assembly efficiency of the backlight module 100. In addition, the conductive portion 12b penetrates the first frame 121 and extends into the receiving cavity 10a of the back plate 11, so that the electric charge on the outer frame portion 12a is conducted to the back plate 11 through the conductive portion 12b, thereby reducing the frame width of the display apparatus P10 and improving the electrostatic protection performance.

[0081] The above describes in detail a backlight module, a display module, and a display apparatus according to the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation manners and application range can be changed by those skilled in the art. In summary, the content of the present description should not be understood as limiting the present application.

Claims

1. A backlight module, characterized in that, The backlight module comprises: a backboard comprising a base and a sidewall arranged on a peripheral area of the base, and a receiving cavity arranged on the sidewall; a frame structure comprising a first frame and a second frame, the second frame comprising an outer frame portion and a conductive portion, the first frame being arranged around the periphery of the backboard, the outer frame portion being arranged on a side of the first frame away from the sidewall, the conductive portion being arranged on a side of the outer frame portion close to the sidewall, the conductive portion penetrating through the first frame and extending into the receiving cavity; wherein the backboard and the outer frame portion are both conductive, and the conductive portion is configured to conduct the electric charge on the outer frame portion to the backboard.

2. The backlight module of claim 1, wherein, The conductive portion is a metal spring, and the conductive portion comprises a first sub-portion and a second sub-portion, the first sub-portion being arranged in the receiving cavity, the first sub-portion being connected to a side of the second sub-portion away from the base, part of the second sub-portion being arranged in the receiving cavity, part of the second sub-portion being fixedly arranged in the first frame, and the second sub-portion being arranged obliquely based on a plane on which the base is arranged.

3. The backlight module of claim 2, wherein, The first sub-portion has a minimum distance d1 of 0 mm≤d1≤0.1 mm to an inner wall of the receiving cavity.

4. The backlight module of claim 3, wherein, In a direction perpendicular to the plane on which the base is arranged, the inner wall of the receiving cavity comprises a first inner wall away from the base, and the first sub-portion has the minimum distance to the first inner wall at an end of the first sub-portion away from the base.

5. The backlight module of claim 4, wherein, In a direction parallel to the plane on which the base is arranged, the receiving cavity penetrates through the sidewall.

6. The backlight module of claim 4, wherein, In the direction parallel to the plane on which the base is arranged, the width of the receiving cavity is smaller than the width of the sidewall, and an end of the first sub-portion away from the outer frame portion is in contact with the inner wall of the receiving cavity.

7. The backlight module of any one of claims 2-6, wherein, The conductive portion further comprises a third sub-portion and a bent sub-portion, the outer frame portion, the bent sub-portion, the third sub-portion and the second sub-portion being sequentially connected, the bent sub-portion being connected to an end of the outer frame portion, the third sub-portion being arranged on the back of the outer frame portion through the bent sub-portion, and part of the bent sub-portion and the third sub-portion being fixedly arranged in the first frame.

8. The backlight module of claim 7, wherein, In a backlight module viewed from a top perspective, the extension length of the bent sub-portion is equal to the extension length of the outer frame portion.

9. The backlight module of claim 7, wherein, The conductive portion and the outer frame portion are in an integrated connection structure, and the first frame and the second frame are configured to be fixedly connected in a two-shot injection manner.

10. The backlight module of claim 7, wherein, The outer frame portion entirely covers a side of the first frame away from the sidewall, and the outer frame portion is configured to be an appearance decoration of a display device.

11. The backlight module according to any one of claims 1-6, wherein, The base and the sidewall form a placement groove, the backlight module comprises an optical assembly arranged in the placement groove. The first frame comprises a support portion and a side plate portion arranged around the periphery of the sidewall, the support portion being connected and arranged on a side of the side plate portion close to the placement groove and located on a side of the sidewall away from the base, and the support portion being configured to support a display panel. A limiting groove is formed on a side of the support portion close to the sidewall, and part of the sidewall is arranged in the limiting groove.

12. A display module, characterized by The display module comprises a backlight module and a display panel, the display panel is arranged on the light emitting side of the backlight module.

13. A display device, characterized by comprising: The display module comprises a backlight module and a display panel, the display panel is arranged on the light emitting side of the backlight module.

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