Backlight module and display device

Abstract

The utility model discloses a backlight module and a display device, the backlight module comprises a first back plate, an outer frame and a second back plate, the outer frame is arranged at the edge of the first back plate, and a mounting cavity is formed by the outer frame and one surface of the first back plate; the second backboard is located on the side, away from the mounting cavity, of the first backboard. Wherein one of the first back plate and the outer frame comprises a first body part and a first matching part which are integrally formed, the second back plate comprises a second body part and a second matching part which are integrally formed, and the first matching part is matched and connected with the second matching part. The display effect can be improved.

Description

TECHNICAL FIELD

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

[0002] In the process of whole machine drop test and pressure test of the display device, the shell of the display device is prone to deformation, which causes the hard components arranged inside the shell to interfere with the backlight module fixed in the shell, resulting in module breakage of the backlight module, scratches on the glass in the backlight module and other defects, and affecting the display effect.

[0003] Therefore, it is necessary to provide a new technical scheme to solve the above technical problems. CONTENT OF THE INVENTION

[0004] The present application aims to provide a backlight module and a display device to improve the display effect.

[0005] To solve the above problems, the technical scheme of the present application is as follows:

[0006] In a first aspect, the present application provides a backlight module, comprising:

[0007] a first back plate;

[0008] an outer frame arranged at the edge of the first back plate, the outer frame and a surface of the first back plate forming a mounting cavity; and

[0009] a second back plate located on a side of the first back plate away from the mounting cavity;

[0010] wherein one of the first back plate and the outer frame comprises a first body part and a first matching part integrally formed, the second back plate comprises a second body part and a second matching part integrally formed, and the first matching part and the second matching part are connected in cooperation.

[0011] In an embodiment of the present application, the outer frame comprises the first body part and the first matching part integrally formed, the first body part is arranged at the periphery of the second back plate, the first body part is provided with the first matching part close to the side surface of the second back plate, and the second matching part is located on a side of the second body part close to the first matching part.

[0012] In an embodiment of the present application, the first body part is provided with a groove close to the side surface of the second back plate, the groove is formed as the first matching part, the edge of the second back plate extends into the groove, the part of the second back plate extending into the groove is formed as the second matching part, and the part of the second back plate located outside the groove is formed as the second body part.

[0013] In an embodiment of the present application, the outer frame comprises:

[0014] a first connecting portion arranged at an edge of the first back plate; and

[0015] a second connecting portion arranged at an edge of the second back plate, the second connecting portion being connected with the first connecting portion, the second connecting portion being provided with the groove near a side surface of the second back plate, and the second connecting portion being in sliding connection with the second back plate.

[0016] In an embodiment of the present application, the second connecting portion comprises:

[0017] a first sub-section connected with the first connecting portion; and

[0018] a second sub-section connected with the first connecting portion, the second sub-section being arranged opposite to the first sub-section, the first sub-section being provided with a first sliding groove near one side of the second sub-section, the second sub-section being provided with a second sliding groove near one side of the first sub-section, and the first sliding groove being arranged opposite to the second sliding groove;

[0019] wherein the groove comprises the first sliding groove and the second sliding groove, and the second back plate is located between the first sub-section and the second sub-section;

[0020] a part of the second back plate away from the second sub-section extends into the first sliding groove and is in sliding connection with the first sub-section;

[0021] a part of the second back plate away from the first sub-section extends into the second sliding groove and is in sliding connection with the second sub-section.

[0022] In an embodiment of the present application, the first sliding groove extends along the length direction of the first sub-section and penetrates through both ends of the first sub-section;

[0023] the second sliding groove extends along the length direction of the second sub-section and penetrates through both ends of the second sub-section.

[0024] In an embodiment of the present application, the backlight module further comprises a limiting member, at least a part of the limiting member being arranged in the groove, and the limiting member being used for limiting the sliding of the second back plate in the groove.

[0025] In an embodiment of the present application, the first back plate comprises a first bottom plate and a first side plate arranged peripherally around the first bottom plate;

[0026] the first connecting portion covers the first side plate and is arranged at an edge of the first bottom plate.

[0027] In an embodiment of the present application, the first connecting portion comprises:

[0028] a first sub-portion disposed on a side of the first side plate close to the mounting cavity;

[0029] a second sub-portion disposed on a side of the first side plate away from the mounting cavity, the second sub-portion surrounding an edge of the first back plate; and

[0030] a third sub-portion disposed on a side of the first side plate away from the first bottom plate and connecting the first sub-portion and the second sub-portion, the first sub-portion, the second sub-portion and the third sub-portion covering the first side plate, the second connecting portion being connected to a side of the second sub-portion away from the third sub-portion;

[0031] wherein the first sub-portion, the second sub-portion, the third sub-portion and the second connecting portion are integrally formed.

[0032] In an embodiment of the present application, in a plan view of the backlight module, a projection area of the second back plate is smaller than a projection area of the first back plate.

[0033] In an embodiment of the present application, the first back plate comprises a first back portion and a second back portion located on at least one side of the first back portion.

[0034] In a thickness direction of the backlight module, the first back portion overlaps the second back plate, and the second back portion is misaligned with the second back plate.

[0035] In an embodiment of the present application, the first back plate is spaced apart from the second back plate.

[0036] In an embodiment of the present application, the backlight module further comprises:

[0037] a reflective sheet located in the mounting cavity and disposed on a side of the first back plate away from the second back plate;

[0038] a light guide plate located in the mounting cavity and disposed on a side of the reflective sheet away from the first back plate, one side of the light guide plate being a light entrance surface, and a side of the light guide plate away from the reflective sheet being a light exit surface;

[0039] an optical film located in the mounting cavity and disposed on a side of the light guide plate away from the reflective sheet; and

[0040] a light bar located in the mounting cavity and disposed on a side of the light entrance surface.

[0041] In an embodiment of the present application, the backlight module further comprises:

[0042] a reflective sheet located in the mounting cavity and disposed on a side of the first back plate away from the second back plate;

[0043] a plurality of lamp beads located in the mounting cavity and arranged on a side of the reflecting sheet away from the first back plate; and

[0044] an optical film located in the mounting cavity and arranged on a side of the plurality of lamp beads away from the reflecting sheet.

[0045] In a second aspect, the present application provides a display device, which comprises a housing, a backlight module and a hard component, and the housing has an accommodating cavity formed therein; the backlight module comprises a first back plate, a frame and a second back plate, the frame is arranged at an edge of the first back plate, and the frame and a surface of the first back plate form a mounting cavity; the second back plate is located on a side of the first back plate away from the mounting cavity; one of the first back plate and the frame comprises a first body part and a first matching part which are integrally formed, the second back plate comprises a second body part and a second matching part which are integrally formed, and the first matching part and the second matching part are connected in a matching mode; the hard component is arranged on an inner wall of the accommodating cavity and located between the second back plate and the inner wall of the accommodating cavity, and the hard component is located on a side of the second back plate away from the first back plate.

[0046] In the present application, by arranging the second back plate in the backlight module, on the one hand, the second back plate can protect the optical film in the mounting cavity, so as to prevent the backlight module from being damaged and the glass in the backlight module from being scratched due to the interference between the first back plate and the hard component inside the display device, and improve the display effect. On the other hand, different thicknesses of the second back plate can be replaced according to the application scene, the whole machine drop test, the pressure test and other factors to improve the protection degree of the backlight module. Since one of the first back plate and the frame and the second back plate are connected in a matching mode through the first matching part and the second matching part, the second back plate is convenient to disassemble and replace, and is suitable for the whole machine structure of different display devices. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a schematic view of an embodiment of the display device of the present application;

[0048] Figure 2 is a schematic view of a first embodiment of the backlight module of the present application;

[0049] Figure 3 is another schematic view of the first embodiment of the backlight module of the present application;

[0050] Figure 4 is a plan view of a second embodiment of the display device of the present application;

[0051] Figure 5 is Figure 4 is a sectional view of the display module in the C-C' section line in the

[0052] Figure 6 is Figure 4 Figure 6 is a cross-sectional view of the display module of Figure 5 along the section line D-D';

[0053] Figure 7 Figure 7 is a schematic view of a second embodiment of the display module of the present application. DETAILED DESCRIPTION

[0054] The meanings of the terms used in the specification and claims correspond to the meanings commonly understood by those of ordinary skill in the art to which the present application pertains. The terms used in the specification and claims are only for the purpose of facilitating the description and understanding of the present application, and are not intended to limit the present application to the narrow meanings of the specific terms used in the specification and claims.

[0055] The present application proposes a display device 1000, which can be a tablet computer, an electronic reader, an electronic display screen, a notebook computer, a mobile phone, an Augmented Reality (AR) \ Virtual Reality (VR) device, a media player, a wearable device, a digital camera, a car navigation device, etc. The display device 1000 can be a liquid crystal display device 1000.

[0056] Referring to Figure 1 , the display device 1000 includes a housing 200, a backlight module 100, and a hard component 300. The housing 200 has a receiving cavity R210 formed inside. The backlight module 100 is fixed in the receiving cavity R210. The hard component 300 is arranged on the inner wall of the receiving cavity R210 and located between the second back plate 30 and the inner wall of the receiving cavity R210. The hard component 300 is located on the side of the second back plate 30 away from the first back plate 10.

[0057] Optionally, the hard component 300 includes a circuit and driving assembly, a structural support, and other hard components.

[0058] The circuit and driving assembly can be a printed circuit board (PCB), a timing control board (T-con board), a metal shielding cover, a connector and a terminal. The metal shielding cover is a metal shell, such as a galvanized steel plate, which is used for electromagnetic shielding and covers the circuit board. The connector and the terminal can be a metal pin or a hard plastic base of a connector, etc.

[0059] The structural support can be a metal frame, a metal shell, a plastic shell, a bracket, a base, a fixing member, an interface protection member, which is used for fixing or supporting the display panel and the circuit board.

[0060] The other hard components can also be a heat dissipation module, such as an aluminum heat sink, a copper pipe or a fan shell, which is used for controlling the internal temperature.

[0061] In the conventional display device 1000, only the first back plate 10 and the outer frame 20 are arranged in the backlight module 100. During the whole machine drop test and pressure test, the shell 200 is prone to deformation, which causes the hard components 300 arranged inside the shell 200 to interfere with the first back plate 10 of the backlight module 100 fixed in the shell 200, resulting in the backlight module 100 being broken, the glass in the backlight module 100 being scratched, and the like, which affects the display effect.

[0062] In the present embodiment, since the backlight module 100 of the display device 1000 further comprises the second back plate 30, the interference between the first back plate 10 and the hard components 300 inside the display device 1000 can be prevented, the backlight module 100 can be prevented from being broken, the glass in the backlight module 100 can be prevented from being scratched, and the like, and the display effect can be improved. On the other hand, the second back plate 30 with different thicknesses can be replaced according to the application scenarios, the whole machine drop test, the pressure test, and the like, to improve the protection degree of the backlight module 100. Since one of the first back plate 10 and the outer frame 20 is connected with the second back plate 30 through the first matching part A2 and the second matching part B2, the second back plate 30 is convenient to disassemble and replace, and is suitable for different whole machine structures of the display device 1000.

[0063] Optionally, the display device 1000 further comprises a display module 400 arranged on the light emitting side of the backlight module 100. The display module 400 can be a liquid crystal display module 400. Optionally, the liquid crystal display module 400 comprises a first polaroid, an array substrate, a liquid crystal layer, a color film substrate, and a second polaroid arranged in layers.

[0064] The present application further provides a backlight module 100 comprising a first back plate 10, an outer frame 20, and a second back plate 30. The outer frame 20 is arranged at the edge of the first back plate 10, and the outer frame 20 and one surface of the first back plate 10 form a mounting cavity. The second back plate 30 is located on the side of the first back plate 10 away from the mounting cavity.

[0065] Optionally, one of the first back plate 10 and the outer frame 20 comprises a first body part A1 and a first matching part A2 which are integrally formed. The second back plate 30 comprises a second body part B1 and a second matching part B2 which are integrally formed. The first matching part A2 and the second matching part B2 are connected in a matching manner.

[0066] In the embodiment, by arranging the second back plate 30 in the backlight module 100, on the one hand, the second back plate 30 protects the optical film 60 in the mounting cavity, which can prevent the backlight module 100 from being damaged due to the interference between the first back plate 10 and the hard components 300 inside the display device 1000, and can prevent the glass in the backlight module 100 from being scratched, thereby improving the display effect. On the other hand, the second back plate 30 with different thicknesses can be replaced according to the application scenarios, the whole machine drop test, the pressure test and other factors to improve the protection of the backlight module 100. Since one of the first back plate 10 and the outer frame 20 is connected with the second back plate 30 through the first matching part A2 and the second matching part B2, the second back plate 30 is convenient to disassemble and replace, and is suitable for different whole machine structures of the display device 1000.

[0067] It should be understood that the first body part A1 and the first matching part A2 are integrally formed, that is, the first matching part A2 cannot be a structure or material such as a screw, a bolt, or glue. Similarly, the second body part B1 and the second matching part B2 are integrally formed, that is, the second matching part B2 cannot be a structure or material such as a screw, a bolt, or glue.

[0068] Optionally, the material of the outer frame 20 can be plastic. The materials of the first back plate 10 and the second back plate 30 can be metal, such as iron, aluminum, copper, and the like.

[0069] Optionally, referring to Figure 2 , the backlight module 100 is a direct type backlight module 100. The backlight module 100 includes the reflective sheet 40, the plurality of lamp beads 72, and the optical film 60. The reflective sheet 40 is located in the mounting cavity and is arranged on the side of the first back plate 10 away from the second back plate 30. The plurality of lamp beads 72 are located in the mounting cavity and are arranged on the side of the reflective sheet 40 away from the first back plate 10. The optical film 60 is located in the mounting cavity and is arranged on the side of the plurality of lamp beads 72 away from the reflective sheet 40.

[0070] Optionally, the optical film 60 includes a diffusion sheet 61 and a prism sheet 62.

[0071] Optionally, referring to Figure 3 , the backlight module 100 is a side type backlight module 100. The backlight module 100 further includes the reflective sheet 40, the light guide plate 50, the optical film 60, and the lamp strip 71. The reflective sheet 40 is located in the mounting cavity and is arranged on the side of the first back plate 10 away from the second back plate 30. The light guide plate 50 is located in the mounting cavity and is arranged on the side of the reflective sheet 40 away from the first back plate 10. One side of the light guide plate 50 is an incident light surface, and the side of the light guide plate 50 away from the reflective sheet 40 is an outgoing light surface. The optical film 60 is located in the mounting cavity and is arranged on the side of the light guide plate 50 away from the reflective sheet 40. The lamp strip 71 is located in the mounting cavity and is arranged on the side of the incident light surface.

[0072] Optionally, please refer to Figure 3 The first back plate 10 is spaced apart from the second back plate 30. The interference between the second back plate 30 and the hard components 300 inside the display device 1000 can be prevented. When the second back plate 30 deforms due to the interference, the interference between the second back plate 30 and the first back plate 10 can be prevented. The display effect can be improved.

[0073] In the first embodiment of the present application:

[0074] Optionally, please refer to Figure 3 The first back plate 10 includes a first body part A1 and a first matching part A2. The outer frame 20 and a surface of the first body part A1 form a mounting cavity. The first matching part A2 is arranged at the periphery of the second back plate 30. The second body part B1 is provided with a second matching part B2 on the side surface close to the first matching part A2.

[0075] Optionally, the first matching part A2 can be a groove, and the second matching part B2 can be a protrusion. The protrusion is inserted into the groove to achieve a clearance fit.

[0076] Optionally, the first matching part A2 can be a buckle, and the second matching part B2 can be a clasp. The buckle and the clasp achieve a buckle connection. The buckle connection belongs to one of the matching connections.

[0077] In the second embodiment of the present application:

[0078] In order to avoid redundancy, the second embodiment of the present application will describe the different parts from the first embodiment of the present application.

[0079] The second embodiment of the present application is different from the first embodiment of the present application in that:

[0080] Optionally, in the plan view of the backlight module 100, the projection area of the second back plate 30 is smaller than the projection area of the first back plate 10.

[0081] Please refer to Figure 4 When the hard components 300 are arranged at the positions as shown in the figure, the distribution of the hard components 300 in the cabinet 200 can be considered. On the one hand, please refer to Figure 5 The second back plate 30 is arranged in the corresponding area. On the other hand, please refer to Figure 6 The second back plate 30 can not be arranged in the remaining area. Thus, the production cost of the backlight module 100 and the display device 1000 can be reduced. The interference between the hard components 300 and the backlight module 100 can be prevented. The display effect can be improved.

[0082] Since the second back plate 30 is not arranged in the other area, the projection area of the second back plate 30 can be smaller than the first back plate 10.

[0083] Optionally, the first back plate 10 comprises a first back part 11 and a second back part 12 located at least one side of the first back part 11.

[0084] In the thickness direction of the backlight module 100, please refer to Figure 5 , the first back part 11 overlaps the second back plate 30. Overlapping the first back part 11 and the second back plate 30 in the area corresponding to the hard component 300 can avoid the interference between the first back part 11 and the hard component 300, and improve the display effect.

[0085] In the thickness direction of the backlight module 100, please refer to Figure 6 , the second back part 12 is staggered with the second back plate 30. In the remaining area, the second back plate 30 is not arranged, so that the second back part 12 is staggered with the second back plate 30, thereby reducing the size of the second back plate 30, reducing the cost of materials required for producing the second back plate 30, and reducing the production cost.

[0086] Since the distribution positions of the hard components 300 in different models and types of casings 200 are different, the backlight module 100 can be adapted to different casings 200, and the local strength of the backlight module 100 corresponding to the casing 200 provided with the hard component 300 can be increased, thereby reducing the risk of damage to the backlight module 100 in the whole machine drop test and pressure test.

[0087] Optionally, please refer to Figure 5 , the outer frame 20 comprises an integrally formed first body part A1 and a first matching part A2. The first body part A1 is arranged at the periphery of the second back plate 30. The first body part A1 is provided with the first matching part A2 near the side surface of the second back plate 30. The second matching part B2 is located on one side of the second body part B1 close to the first matching part A2.

[0088] Compared with the first embodiment, the second embodiment of the present application realizes the matching connection with the second back plate 30 through the outer frame 20.

[0089] Optionally, the first matching part A2 can be a socket, and the second matching part B2 can be a hook. The first matching part A2 and the second matching part B2 realize the snap connection, which belongs to one of the matching connections.

[0090] Optionally, please refer to Figure 6 , the first body part A1 is provided with a groove near the side surface of the second back plate 30. The groove is formed as the first matching part A2. The edge of the second back plate 30 extends into the groove. The part of the second back plate 30 extending into the groove is formed as the second matching part B2. The part of the second back plate 30 located outside the groove is formed as the second body part B1.

[0091] In the present embodiment, please refer to Figure 5The edge of the second back plate 30 extends into the groove, so as to realize the matched connection between the second back plate 30 and the outer frame 20.

[0092] Optionally, referring to Figure 7 The outer frame 20 comprises a first connecting part 21 and a second connecting part 22. The first connecting part 21 is arranged at the edge of the first back plate 10. The second connecting part 22 is arranged at the edge of the second back plate 30. The second connecting part 22 is connected with the first connecting part 21. The second connecting part 22 is provided with a groove close to the side surface of the second back plate 30. The second connecting part 22 is in sliding connection with the second back plate 30.

[0093] In the embodiment, the first connecting part 21 realizes the connection between the outer frame 20 and the first back plate 10. The first connecting part 21 and the first back plate 10 can be connected by adhesion, the first connecting part 21 and the first back plate 10 can be connected by screw locking, and the first connecting part 21 and the first back plate 10 can also be connected by buckling, which is not limited herein.

[0094] The second connecting part 22 realizes the matched connection between the outer frame 20 and the second back plate 30. The second connecting part 22 comprises a first body part A1 and a first matched part A2. When the first matched part A2 is a groove, the second back plate 30 and the second connecting part 22 realize the sliding gap matched. In the case of realizing the sliding gap matched between the second back plate 30 and the second connecting part 22, the second back plate 30 can be slid to overlap with the hard component 300 according to the distribution of the hard component 300 in the shell 200. At this time, the second back plate 30 overlaps with the first back part 11, and the second back plate 30 is dislocated from the second back part 12, so that the installation efficiency of the backlight module 100 can be improved.

[0095] Since the distribution positions of the hard components 300 in different models and types of shells 200 are different, the backlight module 100 can be adapted to different shells 200. The position of the second back plate 30 is adjusted by sliding, so as to increase the local strength of the backlight module 100 at the position where the hard component 300 is arranged in the shell 200, and reduce the risk of damage of the backlight module 100 in the whole machine drop test and pressure test.

[0096] Optionally, the backlight module 100 further comprises a limiting piece. At least part of the limiting piece is arranged in the groove. The limiting piece is used for limiting the sliding of the second back plate 30 in the groove.

[0097] In the embodiment, in order to avoid the sliding of the second back plate 30 relative to the second connecting part 22 after the installation of the backlight module 100, the backlight module 100 further comprises a limiting piece. The limiting piece is used for limiting the sliding of the second back plate 30 in the groove. The limiting piece can be arranged after the installation of the second back plate 30 and the second connecting part 22, or can be arranged in the sliding groove in advance.

[0098] Optionally, the limiting member is a screw, after the second back plate 30 slides to overlap the hard component 300 in the plan view, the screw fixes the second back plate 30, limits the sliding of the second back plate 30 in the groove, thereby preventing the hard component 300 from directly interfering with the first back plate 10, and improving the display effect.

[0099] Optionally, the limiting member can be one of a bayonet or a hook, and the side surface of the second back plate 30 is further provided with the other of the bayonet or the hook, after the second back plate 30 slides to overlap the hard component 300 in the plan view, the bayonet and the hook are matched and connected, the second back plate 30 is fixed, the sliding of the second back plate 30 in the groove is limited, thereby preventing the hard component 300 from directly interfering with the first back plate 10, and improving the display effect.

[0100] Optionally, please refer to Figure 7 The second connecting portion 22 includes a first sub-section 221 and a second sub-section 222. The first sub-section 221 is connected with the first connecting portion 21. The second sub-section 222 is connected with the first connecting portion 21. The second sub-section 222 is oppositely arranged with the first sub-section 221. The side of the first sub-section 221 close to the second sub-section 222 is provided with a first sliding groove 221a. The side of the second sub-section 222 close to the first sub-section 221 is provided with a second sliding groove 222a. The first sliding groove 221a is oppositely arranged with the second sliding groove 222a.

[0101] The groove includes the first sliding groove 221a and the second sliding groove 222a. The second back plate 30 is located between the first sub-section 221 and the second sub-section 222. The part of the second back plate 30 away from the second sub-section 222 extends into the first sliding groove 221a and is slidably connected with the first sub-section 221. The part of the second back plate 30 away from the first sub-section 221 extends into the second sliding groove 222a and is slidably connected with the second sub-section 222.

[0102] In the embodiment, the design of the first sliding groove 221a and the second sliding groove 222a can facilitate the adjustment of the position of the second back plate 30 according to the distribution of the hard component 300, thereby improving the installation efficiency of the backlight module 100 and improving the production efficiency.

[0103] Optionally, the first sliding groove 221a extends along the length direction of the first sub-section 221 and penetrates through both ends of the first sub-section 221.

[0104] Optionally, the second sliding groove 222a extends along the length direction of the second sub-section 222 and penetrates through both ends of the second sub-section 222.

[0105] In the embodiment, the first chute 221a and the second chute 222a are arranged through the first sub-section 221 and the second sub-section 222 respectively, so that the second back plate 30 can be inserted from the side of the outer frame 20 during installation, thereby further improving the installation efficiency of the backlight module 100 and improving the production efficiency.

[0106] Optionally, referring to Figure 7 The first back plate 10 includes a first bottom plate 13 and a first side plate 14 surrounding the periphery of the first bottom plate 13. The first connecting part 21 covers the first side plate 14 and surrounds the edge of the first back plate 10.

[0107] In the embodiment, the material of the outer frame 20 is plastic, and the material of the first back plate 10 is metal. Since the first connecting part 21 covers the first side plate 14, the mold can cover the first side plate 14 when forming the first connecting part 21, and injection molding is performed in the mold, thereby realizing the one-piece forming of the first back plate 10 and the first connecting part 21, improving the production efficiency, and reducing the production cost.

[0108] Optionally, the first connecting part 21 includes a first sub-section 21a, a second sub-section 21b, and a third sub-section 21c. The first sub-section 21a is arranged on the side of the first side plate 14 close to the mounting cavity. The second sub-section 21b is arranged on the side of the first side plate 14 away from the mounting cavity. The second sub-section 21b surrounds the edge of the first back plate 10. The third sub-section 21c is arranged on the side of the first side plate 14 away from the first bottom plate 13 and connects the first sub-section 21a and the second sub-section 21b. The first sub-section 21a, the second sub-section 21b, and the third sub-section 21c cover the first side plate 14. The second connecting part 22 is connected to the side of the second sub-section 21b away from the third sub-section 21c. The first sub-section 21a, the second sub-section 21b, the third sub-section 21c, and the second connecting part 22 are one-piece formed.

[0109] In the embodiment, the second connecting part 22 can realize one-piece forming with the first connecting part 21, thereby realizing one-piece forming of the outer frame 20 and the first back plate 10, improving the production efficiency, and reducing the production cost.

[0110] The specific embodiments of the present application are described in detail above. The above-described embodiments disclosed by the present application are only preferred embodiments of the present application. Those skilled in the art can make many modifications and improvements without departing from the concept of the present application. These modifications and improvements fall within the scope of the claims of the present application.

Claims

1. A backlight module, characterized in that, The backlight module comprises: a first back plate; an outer frame arranged at the edge of the first back plate, the outer frame and a surface of the first back plate forming a mounting cavity; and a second back plate located at a side of the first back plate away from the mounting cavity; wherein one of the first back plate and the outer frame comprises a first body portion and a first matching portion integrally formed, the second back plate comprises a second body portion and a second matching portion integrally formed, and the first matching portion and the second matching portion are connected in matching.

2. The backlight module of claim 1, wherein, The outer frame comprises the first body portion and the first matching portion integrally formed, the first body portion is arranged at the periphery of the second back plate, the first body portion is provided with the first matching portion near the side of the second back plate, and the second matching portion is located at a side of the second body portion near the first matching portion.

3. The backlight module of claim 2, wherein, The first body portion is provided with a groove near the side of the second back plate, the groove is formed as the first matching portion, the edge of the second back plate extends into the groove, the part of the second back plate extending into the groove is formed as the second matching portion, and the part of the second back plate located outside the groove is formed as the second body portion.

4. The backlight module of claim 3, wherein, The outer frame comprises: a first connecting portion arranged at the edge of the first back plate; and a second connecting portion arranged at the edge of the second back plate, the second connecting portion being connected with the first connecting portion, the second connecting portion being provided with the groove near the side of the second back plate, and the second connecting portion being connected with the second back plate in sliding.

5. The backlight module of claim 4, wherein the light source is a light emitting diode (LED). The second connecting portion comprises: a first sub-section connected with the first connecting portion; and a second sub-section connected with the first connecting portion, the second sub-section being arranged opposite to the first sub-section, the first sub-section being provided with a first sliding groove at a side near the second sub-section, the second sub-section being provided with a second sliding groove at a side near the first sub-section, and the first sliding groove and the second sliding groove being arranged opposite to each other; wherein the groove comprises the first sliding groove and the second sliding groove, and the second back plate is located between the first sub-section and the second sub-section; the part of the second back plate away from the second sub-section extends into the first sliding groove and is connected with the first sub-section in sliding; the part of the second back plate away from the first sub-section extends into the second sliding groove and is connected with the second sub-section in sliding.

6. The backlight module of claim 5, wherein, The first sliding groove extends along the length direction of the first sub-section and penetrates through both ends of the first sub-section; The second sliding groove extends along the length direction of the second sub-section and penetrates through both ends of the second sub-section.

7. The backlight module of claim 4, wherein the light source is a light emitting diode (LED). The backlight module further comprises a limiting member, at least part of the limiting member is arranged in the groove, and the limiting member is used for limiting the sliding of the second back plate in the groove.

8. The backlight module of claim 4, wherein, The first back plate comprises a first bottom plate and a first side plate arranged at the periphery of the first bottom plate; The first connecting portion covers the first side plate and is arranged at the edge of the first bottom plate.

9. The backlight module of claim 8, wherein, The first connecting portion comprises: a first sub-portion arranged at a side of the first side plate near the mounting cavity; a second sub-portion arranged at a side of the first side plate away from the mounting cavity, the second sub-portion being arranged at the edge of the first back plate; and A third sub-portion is arranged on a side of the first side plate away from the first bottom plate and connects the first sub-portion and the second sub-portion, the first sub-portion, the second sub-portion and the third sub-portion cover the first side plate, and the second connecting portion is arranged on a side of the second sub-portion away from the third sub-portion; The first sub-portion, the second sub-portion, the third sub-portion and the second connecting portion are integrally formed.

10. The backlight module of any of claims 1-9, wherein, In a plan view of the backlight module, a projection area of the second back plate is smaller than a projection area of the first back plate.

11. The backlight module of claim 10, wherein, The first back plate comprises a first back portion and a second back portion arranged on at least one side of the first back portion. In a thickness direction of the backlight module, the first back portion overlaps the second back plate, and the second back portion is misaligned with the second back plate.

12. The backlight module of any one of claims 1-9, wherein, The first back plate is arranged in a spaced manner with the second back plate.

13. The backlight module of any of claims 1-9, wherein, The backlight module further comprises: A reflective sheet arranged in the mounting cavity and on a side of the first back plate away from the second back plate; A light guide plate arranged in the mounting cavity and on a side of the reflective sheet away from the first back plate, one side of the light guide plate is an incident light surface, and a side of the light guide plate away from the reflective sheet is an emergent light surface; An optical film arranged in the mounting cavity and on a side of the light guide plate away from the reflective sheet; and A lamp strip arranged in the mounting cavity and on a side of the incident light surface; Alternatively, The backlight module further comprises: A reflective sheet arranged in the mounting cavity and on a side of the first back plate away from the second back plate; A plurality of lamp beads arranged in the mounting cavity and on a side of the reflective sheet away from the first back plate; and An optical film arranged in the mounting cavity and on a side of the plurality of lamp beads away from the reflective sheet.

14. A display device comprising: The backlight module comprises: A housing, an accommodating cavity is formed in the housing; The backlight module according to any one of claims 1-13 is fixed in the accommodating cavity; and A hard component is arranged on an inner wall of the accommodating cavity and between the second back plate and the inner wall of the accommodating cavity, and the hard component is arranged on a side of the second back plate away from the first back plate.

Images