Backlight module and display

Abstract

This utility model discloses a backlight module, which includes a backplate, a light source, and a light guide assembly. The backplate defines a receiving cavity, in which the light source and the light guide assembly are housed. The light source emits light to the light guide assembly, and the light guide assembly conducts the light. The backplate defines the receiving cavity, and the bottom wall of the cavity is coated with reflective paint. The reflective paint reflects light leaking from the side of the light guide assembly towards the bottom wall back to the light guide assembly. The backplate also has a first positioning structure, which engages with a second positioning structure of a painting fixture to position the backplate within the painting fixture. This utility model's backlight module improves the positional accuracy of the backplate during painting.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight module and a display. Background Technology

[0002] With the development of automotive displays, the requirements for the structural stability of the backlight module of automotive displays are also getting higher and higher. The backlight module is mainly used to provide backlight illumination for the display screen of automotive displays.

[0003] Typically, a backlight module mainly includes a backplate, a light source, a light guide plate, and a reflective film. The light source, light guide plate, and reflective film are all mounted on the backplate. The light source is used to emit light to the light guide plate, the light guide plate is used to convert the light emitted by the light source into a surface light source, and the reflective film is used to reflect the light leaking from the bottom of the light guide plate back to the light guide plate.

[0004] To simplify component setup, the reflective film on the reflective light guide plate was replaced with reflective paint applied to the back plate. However, during painting, the back plate is prone to shifting or mispositioning, resulting in low positional accuracy during painting. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a backlight module and display that can improve the positional accuracy of the back panel during painting.

[0006] In a first aspect, this utility model provides a backlight module, which includes a back plate, a light source, and a light guide assembly. The back plate defines an accommodating cavity, and the light source and the light guide assembly are housed in the accommodating cavity. The light source is used to emit light to the light guide assembly, and the light guide assembly is used to conduct light.

[0007] The back plate defines a receiving cavity, and the bottom wall of the receiving cavity is provided with reflective paint. The reflective paint is used to reflect the light leaking from the side of the light guide assembly toward the bottom wall back to the light guide assembly. The back plate is provided with a first positioning structure, which is used to cooperate with the second positioning structure of the spray painting fixture to position the back plate in the spray painting fixture.

[0008] The backlight module according to the embodiment of this utility model has at least the following beneficial effects:

[0009] By setting a first positioning structure on the back panel, when the back panel is installed in the spray painting fixture, the back panel can be positioned and engaged with the second positioning structure of the spray painting fixture through the first positioning structure, thereby positioning the back panel in the spray painting fixture. This facilitates the installation of the back panel in the spray painting fixture, prevents the back panel from shifting or being mispositioned, and ensures that the back panel is in a preset fixed position. This improves the positional accuracy of the back panel during spraying, thereby improving the accuracy of the spraying range of the back panel and ensuring the consistency of the spraying range of the product.

[0010] According to some embodiments of the present invention, the back plate includes a bottom plate and a side plate, the side plate is connected to the side of the bottom plate, the bottom plate and the side plate together define an accommodating cavity, and the first positioning structure is disposed on the side of the side plate away from the bottom plate.

[0011] According to some embodiments of the present invention, the first positioning structure is a positioning groove, and the second positioning structure is a positioning protrusion. The positioning groove and the positioning protrusion are used for insertion and engagement.

[0012] Alternatively, the first positioning structure is a positioning protrusion, and the second positioning structure is a positioning groove, with the positioning protrusion and positioning groove used for insertion and mating.

[0013] According to some embodiments of the present invention, the light guide assembly includes a light guide plate, a diffuser plate, a lower brightness enhancement film, and an upper brightness enhancement film. The light guide plate, diffuser plate, lower brightness enhancement film, and upper brightness enhancement film are stacked in sequence. The light guide plate is opposite to the reflective paint, and the light source is located on one circumferential side of the light guide plate.

[0014] According to some embodiments of the present invention, the light guide plate is provided with a limiting protrusion, and the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film are all provided with limiting grooves. The limiting protrusion is inserted into the limiting grooves of the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film to restrict the radial movement of the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film along the limiting protrusion.

[0015] According to some embodiments of the present invention, the back plate is provided with a first limiting structure, and the light guide component is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the movement of the light guide component relative to the back plate.

[0016] According to some embodiments of the present invention, the backlight module further includes a limiting post, a first limiting structure is a first limiting hole, a second limiting structure is a second limiting hole, the first limiting hole and the second limiting hole are connected and coaxial, and the limiting post passes through the first limiting hole and the second limiting hole.

[0017] According to some embodiments of the present invention, the first limiting hole is provided with an internal thread;

[0018] The limiting post includes a column and a flange. The column is provided with an external thread. The flange is connected to the end of the column and protrudes from the column radially. The column passes through the first limiting hole and the second limiting hole and is threadedly connected with the internal thread. The flange abuts against the side of the light guide assembly away from the bottom wall.

[0019] According to some embodiments of the present invention, the backlight module further includes a pressure ring, which is located on the other side of the light guide assembly away from the bottom wall. The pressure ring is disposed along the edge of the light guide assembly and abuts against the light guide assembly, and the pressure ring is in contact with the side wall of the accommodating cavity.

[0020] Secondly, this utility model embodiment also provides a display, which includes a display screen and the aforementioned backlight module. The display screen is mounted on the backlight module, and the backlight module is used to provide backlight illumination for the display screen.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a three-dimensional structural view of a backlight module provided in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 The exploded view of the backlight module shown:

[0025] Figure 3 for Figure 2 Enlarged view of part A:

[0026] Figure 4 for Figure 2 The diagram shown is an exploded view of the light guide assembly.

[0027] Figure 5 This is an exploded view of the backplate and light guide assembly provided in another embodiment of the present invention;

[0028] Figure 6 for Figure 1 Enlarged view of part B.

[0029] Figure label:

[0030] Backlight module 100;

[0031] Back plate 10; receiving cavity 110; reflective paint 120; first positioning structure 101; first limiting structure 102; first fastening structure 103; bottom plate 11; side plate 12;

[0032] Light source 20;

[0033] Light guide assembly 30; limiting protrusion 301; limiting groove 302; second limiting structure 303; light guide plate 31; diffuser plate 32; lower brightness enhancement film 33; upper brightness enhancement film 34;

[0034] Limiting post 40; Post body 41; Flange 42;

[0035] Pressure ring 50; second fastening structure 501. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0040] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Please see Figures 1 to 3 This utility model embodiment provides a backlight module 100, which is used to provide backlight illumination for a display screen.

[0042] The backlight module 100 includes a back plate 10, a light source 20, and a light guide assembly 30. The back plate 10 defines a receiving cavity 110. The light source 20 and the light guide assembly 30 are housed in the receiving cavity 110. The light source 20 is used to emit light to the light guide assembly 30, and the light guide assembly 30 is used to conduct the light.

[0043] The back plate 10 defines a receiving cavity 110. The bottom wall of the receiving cavity 110 is provided with reflective paint 120. The reflective paint 120 is used to reflect the light leaking from the side of the light guide assembly 30 toward the bottom wall back to the light guide assembly 30. The back plate 10 is provided with a first positioning structure 101, which is used to cooperate with the second positioning structure of the spray painting fixture to position the back plate 10 in the spray painting fixture.

[0044] In this embodiment of the present invention, in a first aspect, by providing a first positioning structure 101 on the back plate 10, when the back plate 10 is installed in the spray painting fixture, the back plate 10 can be positioned and engaged with the second positioning structure of the spray painting fixture through the first positioning structure 101, thereby positioning the back plate 10 in the spray painting fixture. This facilitates the installation of the back plate 10 in the spray painting fixture, prevents the back plate 10 from shifting or being mispositioned, and ensures that the back plate 10 is in a preset fixed position. This improves the positional accuracy of the back plate 10 during spraying, thereby improving the accuracy of the spraying range of the back plate 10 and ensuring... The product's paint coverage is consistent; secondly, by setting reflective paint 120 on the back panel 10, the traditional reflective film used to reflect light leaking from the side of the light guide component 30 toward the bottom wall back to the light guide component 30 can be effectively avoided from being squeezed and rubbed during installation, resulting in wrinkles and weakened reflective performance. This ensures the stability of the reflective paint 120 in reflecting light from the light guide component 30, and reduces the space occupied by setting the reflective film. Moreover, the cost of setting reflective paint 120 is lower than that of reflective film, which facilitates the subsequent assembly of the backlight module 100.

[0045] Among them, the reflective paint 120 can be a white high-reflective paint. The white high-reflective paint can reflect light to the maximum extent, ensuring that the light utilization rate of the backlight module 100 is better.

[0046] In the specific implementation process, the bottom wall of the accommodating cavity 110 can be polished before the reflective paint 120 is sprayed.

[0047] Optionally, the thickness of the reflective paint 120 is 0.05mm to 0.15mm. This thickness setting ensures the reflective effect without adding too much weight or occupying extra space, making the structure inside the accommodating cavity 110 more compact.

[0048] Typically, a spray painting fixture includes a base and a top cover. During spray painting, a back plate 10 is mounted on the base, and the top cover is placed around the perimeter of the back plate 10. The middle part of the top cover is hollowed out to expose the bottom wall of the receiving cavity 110. The spray painting device sprays reflective paint 120 onto the bottom wall of the receiving cavity 110 through this hollowed-out part. Because the bottom and peripheral sides of the back plate 10 have many protrusions, recesses, or curved surfaces, it is difficult to form a flat end face for fitting with the top cover. If the first positioning structure 101 is placed on the bottom and peripheral sides of the back plate 10, it is difficult to position and cooperate with the second positioning structure of the spray painting fixture, which can easily lead to a more complex structural design.

[0049] Therefore, please refer to Figure 3 In some embodiments, the back plate 10 includes a bottom plate 11 and a side plate 12. The side plate 12 is connected to the side of the bottom plate 11. The bottom plate 11 and the side plate 12 together define the receiving cavity 110. The first positioning structure 101 is disposed on the side of the side plate 12 away from the bottom plate 11, that is, the first positioning structure 101 is located at the end face of the side plate 12 away from the bottom plate 11. Correspondingly, the second positioning structure is disposed on the side of the top cover facing the base, that is, the second positioning structure is located at the end face of the top cover facing the base. Thus, when the top cover is placed on the side plate 12, the first positioning structure 101 and the second positioning structure are facing each other. The first positioning structure 101 can be positioned and cooperated with the second positioning structure, so that the position of the bottom wall of the receiving cavity 110 (that is, the surface of the bottom plate 11 located in the receiving cavity 110) to be painted is exposed in the hollow part of the top cover, thereby ensuring the accuracy of the painting range of the back plate 10 and facilitating the positioning of the back plate 10 in the painting fixture.

[0050] In some embodiments, the first positioning structure 101 is a positioning groove, that is, a positioning protrusion is formed by recessing from the end face of the side plate 12 away from the bottom plate 11 toward the bottom plate 11, and the second positioning structure is a positioning protrusion, that is, a positioning protrusion is formed by extending from the end face of the top cover toward the base toward the base, and the positioning groove and the positioning protrusion are used for insertion and engagement; or, the first positioning structure 101 is a positioning protrusion (not shown), that is, a positioning protrusion is formed by extending from the end face of the side plate 12 away from the bottom plate 11 away from the bottom plate 11, and the second positioning structure is a positioning groove, that is, a positioning groove is formed by recessing from the end face of the top cover toward the base away from the base, and the positioning protrusion and the positioning groove are used for insertion and engagement.

[0051] When the back plate 10 is positioned and engaged with the paint spraying fixture, the positioning protrusion is inserted into the positioning groove. When the positioning engagement between the back plate 10 and the paint spraying fixture is released, the positioning protrusion is pulled out of the positioning groove. Its structure is simple and easy to operate, which helps to improve the installation efficiency of the back plate 10 in the paint spraying fixture.

[0052] Please see Figure 3 and Figure 4In some embodiments, the light guide assembly 30 includes a light guide plate 31, a diffuser plate 32, a lower brightness enhancement film 33, and an upper brightness enhancement film 34. The light guide plate 31, diffuser plate 32, lower brightness enhancement film 33, and upper brightness enhancement film 34 are stacked in sequence. The light guide plate 31 is opposite to the reflective paint 120, and the light source 20 is located on one circumferential side of the light guide plate 31.

[0053] The light source 20 is used to emit light from the light guide plate 31; the light guide plate 31 is used to convert the light emitted by the light source 20 into a surface light source 20 and to distribute the light as evenly as possible throughout the display area; the reflective paint 120 is used to reflect the light leaking from the bottom of the light guide plate 31 (that is, the side of the light guide plate 31 facing the bottom wall of the accommodating cavity 110) back to the light guide plate 31, so as to improve the utilization rate of light and the overall brightness, which helps to reduce energy loss and improve the display effect; the diffuser plate 32 is used to scatter the light from the light guide plate 31, eliminate the phenomenon of uneven light, and thus achieve a more uniform lighting effect; the lower brightness enhancement film 33 and the upper brightness enhancement film 34 are used to converge the light and enhance the brightness of the front.

[0054] In automotive displays, as the vehicle moves along with it, the vibrations are transmitted to the light guide component 30 of the backlight module 100. If the stability of the components of the light guide component 30 is poor, the components of the light guide component 30 may shift relative to each other, affecting the display effect.

[0055] Therefore, please refer to Figure 4 In some embodiments, the light guide plate 31 is provided with a limiting protrusion 301, and the diffuser plate 32, the lower brightness enhancement film 33, and the upper brightness enhancement film 34 are all provided with limiting grooves 302. The limiting protrusion 301 is inserted into the limiting grooves 302 of the diffuser plate 32, the lower brightness enhancement film 33, and the upper brightness enhancement film 34 to limit the radial movement of the diffuser plate 32, the lower brightness enhancement film 33, and the upper brightness enhancement film 34 along the limiting protrusion 301. In this way, the stability between the components of the light guide assembly 30 can be improved. Even if the backlight module 100 is vibrated during use, it can prevent the components of the light guide assembly 30 from moving relative to each other, so that the components of the light guide assembly 30 are always fixed relative to each other, thereby enabling the backlight module 100 to provide stable backlight illumination for the display screen.

[0056] Please see Figure 5In other embodiments, the back plate 10 is provided with a first limiting structure 102, and the light guide assembly 30 is provided with a second limiting structure 303. The first limiting structure 102 and the second limiting structure 303 cooperate to limit the movement of the light guide assembly 30 relative to the back plate 10. In this way, the stability of the light guide assembly 30 in the back plate 10 can be improved. Even if the backlight module 100 is vibrated during use, the light guide assembly 30 can be prevented from moving relative to the back plate 10, so that the light guide assembly 30 is always fixed in the same position, thereby enabling the backlight module 100 to provide stable backlight illumination for the display screen.

[0057] In some embodiments, the backlight module 100 further includes a limiting post 40, a first limiting structure 102 being a first limiting hole, and a second limiting structure 303 being a second limiting hole. The first limiting hole and the second limiting hole are connected and coaxial. The limiting post 40 passes through the first limiting hole and the second limiting hole. In this way, the limiting post 40 can restrict the light guide assembly 30 from moving radially relative to the back plate 10 along the limiting post 40. Its structure is simple and easy to assemble.

[0058] In some embodiments, the first limiting hole is provided with an internal thread. The limiting post 40 includes a post 41 and a flange 42. The post 41 is provided with an external thread, and the flange 42 is connected to the end of the post 41 and protrudes from the post 41 radially. The post 41 passes through the first limiting hole and the second limiting hole and is threadedly connected with the internal thread. The flange 42 abuts against the side of the bottom wall of the light guide assembly 30 away from the receiving cavity 110. In this way, the post 41 can restrict the light guide assembly 30 from moving radially relative to the back plate 10 along the limiting post 40, and the flange 42 can restrict the light guide assembly 30 from moving in the direction away from the bottom plate 11. At the same time, the external thread of the post 41 is threadedly connected to the internal thread of the first limiting hole, so that the limiting post 40 can achieve a tight connection between the light guide assembly 30 and the back plate 10, ensuring the stability of the light guide assembly 30 in the back plate 10.

[0059] The limiting post 40 can be a bolt, the post 41 mentioned above is the bolt shank, and the flange 42 mentioned above.

[0060] Specifically, the base plate 11 is provided with the aforementioned first limiting hole, and the light guide plate 31, diffuser plate 32, lower brightness enhancement film 33 and upper brightness enhancement film 34 are provided with the aforementioned second limiting holes. Bolts are sequentially inserted into the second limiting holes of the upper brightness enhancement film 34, lower brightness enhancement film 33, diffuser plate 32, and light guide plate 31, as well as the first limiting hole of the base plate 11, and are threadedly connected to the first limiting hole.

[0061] In some other embodiments, the first limiting structure 102 and the second limiting structure 303 may also be other structures that can achieve limiting cooperation. For example, the first limiting structure 102 is a protruding post and the second limiting structure 303 is a through hole, with the protruding post inserted into the through hole.

[0062] Please see Figure 2 In some embodiments, the backlight module 100 further includes a retaining ring 50, which is located on the other side of the bottom wall of the light guide assembly 30 away from the accommodating cavity 110. The retaining ring 50 is disposed along the edge of the light guide assembly 30 and abuts against the light guide assembly 30, and the retaining ring 50 is in contact with the side wall of the accommodating cavity 110.

[0063] In this embodiment, by setting the pressure ring 50 along the edge of the light guide assembly 30 and abutting against the light guide assembly 30, the pressure ring 50 can restrict the light guide assembly 30 from moving away from the bottom wall of the receiving cavity 110 relative to the back plate 10, so that the light guide assembly 30 can be stably installed in the back plate 10. In addition, the pressure ring 50 can prevent the edge of the light guide assembly 30 from lifting, ensuring the flatness of the edge of the light guide assembly 30. By making the pressure ring 50 fit against the side wall of the receiving cavity 110, the pressure ring 50 can be restricted from translating relative to the back plate 10 in the receiving cavity 110, so that the pressure ring 50 can be stably installed in the back plate 10, and a better supporting and limiting effect on the light guide assembly 30 is achieved, thereby improving the structural stability and reliability of the backlight module 100.

[0064] Furthermore, the combination of the aforementioned limiting protrusion 301 and limiting groove 302, or the combination of the first limiting structure 102 and the second limiting structure 303, can further ensure the stability of the light guide assembly 30 in the back plate 10.

[0065] Please see Figure 2 and Figure 6 In some embodiments, the back plate 10 is provided with a first fastening structure 103, and the pressure ring 50 is provided with a second fastening structure 501. The first fastening structure 103 and the second fastening structure 501 are fastened together to fix the pressure ring 50 to the back plate 10.

[0066] By engaging the first fastening structure 103 with the second fastening structure 501, both the back plate 10 and the pressure ring 50 are fixed, while the pressure ring 50 is easily disassembled and reassembled on the back plate 10, thus improving the efficiency of disassembly and assembly.

[0067] In some embodiments, the first fastening structure 103 is a protrusion, and the second fastening structure 501 is a hook and loop fastener, which fastens to the protrusion to fix the pressure ring 50 to the back plate 10. Of course, the first fastening structure 103 can also be a hook and loop fastener, and the second fastening structure 501 can also be a protrusion, with the hook and loop fastening to the protrusion to fix the pressure ring 50 to the back plate 10.

[0068] Specifically, the side plate 12 is provided with the aforementioned protrusion, and the pressure ring 50 is provided with the aforementioned fastener on the side away from the bottom plate 11. The fastener extends to the side plate 12. In this way, the protrusion and fastener can avoid causing additional space occupation in the receiving cavity 110.

[0069] In some other embodiments, the first snap-fit ​​structure 103 and the second snap-fit ​​structure 501 may also be other structures that can be snapped together and fixed. For example, the first snap-fit ​​structure 103 is a slot and the second snap-fit ​​structure 501 is a snap-fit ​​protrusion. The snap-fit ​​protrusion snaps into the slot to achieve the snap-fit ​​engagement between the back plate 10 and the pressure ring 50.

[0070] This utility model embodiment also provides a display, which includes a display screen and the aforementioned backlight module 100. The display screen is mounted on the backlight module 100, and the backlight module 100 is used to provide backlight illumination for the display screen.

[0071] It should be noted that the display provided in this embodiment of the present invention only shows the part related to the technical problem to be solved by this embodiment of the present invention. It is understood that the display provided in this embodiment of the present invention also includes other structures for implementing the function of the display, including but not limited to circuit boards.

[0072] Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this utility model. Furthermore, embodiments of this utility model and features thereof can be combined with each other, unless otherwise specified.

Claims

1. A backlight module, characterized in that, The device includes a backplate, a light source, and a light guide assembly. The backplate defines a receiving cavity, and the light source and the light guide assembly are housed in the receiving cavity. The light source is used to emit light to the light guide assembly, and the light guide assembly is used to conduct the light. The back plate defines a receiving cavity, and the bottom wall of the receiving cavity is provided with reflective paint. The reflective paint is used to reflect the light leaking from the side of the light guide assembly toward the bottom wall back to the light guide assembly. The back plate is provided with a first positioning structure, which is used to cooperate with a second positioning structure of the spray painting fixture to position the back plate in the spray painting fixture.

2. The backlight module according to claim 1, characterized in that, The back plate includes a bottom plate and a side plate. The side plate is connected to the side of the bottom plate. The bottom plate and the side plate together define an accommodating cavity. The first positioning structure is disposed on the side of the side plate away from the bottom plate.

3. The backlight module according to claim 2, characterized in that, The first positioning structure is a positioning groove, and the second positioning structure is a positioning protrusion. The positioning groove and the positioning protrusion are used for insertion and engagement. Alternatively, the first positioning structure is a positioning protrusion, and the second positioning structure is a positioning groove, wherein the positioning protrusion and the positioning groove are used for insertion and engagement.

4. The backlight module according to claim 1, characterized in that, The light guide assembly includes a light guide plate, a diffuser plate, a lower brightness enhancement film, and an upper brightness enhancement film. The light guide plate, the diffuser plate, the lower brightness enhancement film, and the upper brightness enhancement film are stacked sequentially. The light guide plate is opposite to the reflective paint, and the light source is located on one circumferential side of the light guide plate.

5. The backlight module according to claim 4, characterized in that, The light guide plate is provided with a limiting protrusion, and the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film are all provided with limiting grooves. The limiting protrusion is inserted into the limiting grooves of the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film to restrict the diffuser plate, the lower brightness enhancement film and the upper brightness enhancement film from moving radially along the limiting protrusion.

6. The backlight module according to claim 1, characterized in that, The back panel is provided with a first limiting structure, and the light guide component is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the movement of the light guide component relative to the back panel.

7. The backlight module according to claim 6, characterized in that, The backlight module also includes a limiting post, the first limiting structure is a first limiting hole, the second limiting structure is a second limiting hole, the first limiting hole and the second limiting hole are connected and coaxial, and the limiting post passes through the first limiting hole and the second limiting hole.

8. The backlight module according to claim 7, characterized in that, The first limiting hole is provided with internal threads; The limiting post includes a column body and a flange. The column body is provided with an external thread. The flange is connected to the end of the column body and protrudes from the column body radially. The column body passes through the first limiting hole and the second limiting hole and is threadedly connected to the internal thread. The flange abuts against the side of the light guide assembly away from the bottom wall.

9. The backlight module according to claim 1, characterized in that, The backlight module also includes a pressure ring, which is located on the side of the light guide assembly away from the bottom wall. The pressure ring is disposed along the edge of the light guide assembly and abuts against the light guide assembly, and the pressure ring is in contact with the side wall of the accommodating cavity.

10. A display, characterized in that, The device includes a display screen and a backlight module as described in any one of claims 1 to 9, wherein the display screen is mounted on the backlight module, and the backlight module is used to provide backlight illumination for the display screen.

Images