Backlight module

Abstract

The utility model discloses a backlight module, backlight module includes backplate, edge and light guide assembly. Backplate includes bottom plate and side plate, and side plate is connected in the side of bottom plate, and bottom plate and side plate are in common and define the accommodation cavity, and edge and light guide assembly are accommodated in the accommodation cavity respectively, and edge is located in the side of light guide assembly away from bottom plate, and is resisted to light guide assembly, edge and the inner wall of side plate limit cooperation to restrict edge and move along the direction of edge and point to side plate, side plate is provided with first limit structure, and edge is provided with second limit structure, and first limit structure and second limit structure limit cooperation to restrict edge and move along the direction of side plate and point to edge. The utility model discloses a backlight module can improve its structural stability.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight module. 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] During vehicle operation, vibrations are transmitted to the backlight module of the in-vehicle display. If the structural stability of the backlight module is poor, it can easily cause the internal components of the backlight module to shift, affecting the display effect of the in-vehicle display.

[0004] In related technologies, a backlight module includes a backplate, a light guide assembly, and a retaining edge. The light guide assembly is mounted on the backplate, and the retaining edge is mounted on the side of the light guide assembly away from the backplate. The retaining edge supports and limits the movement of the light guide assembly relative to the backplate. However, the degree of limiting fit between the backplate and the retaining edge is low, making the retaining edge itself prone to movement. This results in a poor limiting effect on the light guide assembly, and therefore, the structural stability of the backlight module is poor. 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 that can improve the structural stability of the backlight module.

[0006] This utility model embodiment provides a backlight module, which includes a back plate, a pressing edge, and a light guide assembly. 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 pressing edge and the light guide assembly are respectively accommodated in the accommodating cavity. The pressing edge is located on the side of the light guide assembly away from the bottom plate and abuts against the light guide assembly.

[0007] The pressure edge is matched with the inner wall of the side plate to limit the movement of the pressure edge in the direction from the pressure edge to the side plate;

[0008] The side plate is provided with a first limiting structure, and the pressing edge is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the movement of the pressing edge along the direction of the side plate towards the pressing edge.

[0009] The backlight module according to the embodiments of this utility model has at least the following technical effects:

[0010] By limiting the movement of the pressure edge with the inner wall of the side plate, and through the mutual limiting structure of the first and second limiting structures, the movement of the pressure edge can be restricted in two opposite directions toward or away from the side plate, reducing the degree of freedom of movement of the pressure edge. The high degree of limiting fit between the back plate and the pressure edge allows the pressure edge to be firmly installed on the back plate and achieves a good supporting and limiting effect on the light guide component, thereby limiting the movement of the light guide component relative to the back plate and improving the structural stability and reliability of the backlight module.

[0011] According to some embodiments of the present invention, the first limiting structure is a first limiting groove, the second limiting structure is a first limiting protrusion, the first limiting protrusion is inserted into the first limiting groove, and the first limiting groove is used to restrict the first limiting protrusion from disengaging from the first limiting groove along the direction of the side plate towards the pressing edge.

[0012] According to some embodiments of the present invention, the first limiting groove includes a first groove and a second groove, the second groove is located on the side of the first groove away from the receiving cavity, the first groove connects the second groove and the receiving cavity, and the width of the second groove is greater than the width of the first groove.

[0013] The first limiting protrusion includes a first limiting part and a second limiting part. The first limiting part is connected to the pressing edge, and the second limiting part is connected to the end of the first limiting part away from the pressing edge. The first limiting part is inserted into the first groove, and the second limiting part is inserted into the second groove. The width of the second limiting part is greater than the width of the first groove.

[0014] According to some embodiments of the present invention, the first limiting groove is disposed on the side of the side plate away from the bottom plate, and the first limiting protrusion is disposed on the side of the pressing edge away from the bottom plate.

[0015] According to some embodiments of this utility model, the side plate is provided with a third limiting structure, and the pressing edge is provided with a fourth limiting structure. The third limiting structure and the fourth limiting structure cooperate to limit the movement of the pressing edge along the long side of the side plate.

[0016] According to some embodiments of the present invention, the third limiting structure is the second limiting groove, and the fourth limiting structure is the second limiting protrusion. The second limiting protrusion is inserted into the second limiting groove and restricts the movement of the second limiting protrusion along the side parallel to the bottom plate.

[0017] According to some embodiments of the present invention, the third limiting structure is disposed on the side of the side plate away from the bottom plate, and the fourth limiting structure is disposed on the side of the pressing edge away from the bottom plate.

[0018] According to some embodiments of this utility model, the side plate is provided with a fifth limiting structure, and the pressing edge is provided with a sixth limiting structure. The fifth limiting structure and the sixth limiting structure cooperate to limit the movement of the pressing edge away from the bottom plate.

[0019] According to some embodiments of the present invention, the fifth limiting structure is a third limiting groove, and the sixth limiting structure is a third limiting protrusion. The third limiting protrusion is inserted into the third limiting groove and restricts the third limiting protrusion from moving away from the base plate.

[0020] According to some embodiments of the present invention, the pressing edge is a metal pressing edge, which includes a pressing plate and an abutting plate. The pressing plate abuts against the light guide component, and the abutting plate is connected to the side of the pressing plate away from the light guide component. The abutting plate abuts against the inner wall of the side plate.

[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 front view of the backlight module provided in an embodiment of the present utility model;

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

[0025] Figure 3 for Figure 1 The backlight module shown is a three-dimensional cross-sectional view along the AA direction:

[0026] Figure 4 for Figure 3 The enlarged view of section B shown;

[0027] Figure 5 for Figure 3 Enlarged view of section C shown;

[0028] Figure 6 for Figure 3 The enlarged view of part D is shown.

[0029] Figure label:

[0030] Backlight module 100;

[0031] Back plate 10; receiving cavity 110; first limiting structure 101; first groove 1011; second groove 1012; third limiting structure 102; fifth limiting structure 103; bottom plate 11; side plate 12;

[0032] Pressing edge 20; second limiting structure 201; first limiting part 2011; second limiting part 2012; fourth limiting structure 202; sixth limiting structure 203; pressing plate 21; abutting plate 22;

[0033] Light guide assembly 30; reflective film 31; light guide plate 32; diffuser plate 33; first brightness enhancement film 34; second brightness enhancement film 35. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Please see Figure 1 This utility model embodiment provides a backlight module 100, which is used to provide backlight illumination for a display screen.

[0040] Please see Figures 2 to 4The backlight module 100 includes a back plate 10, a pressing edge 20, and a light guide assembly 30. 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 an accommodating cavity 110. The pressing edge 20 and the light guide assembly 30 are respectively accommodated in the accommodating cavity 110. The pressing edge 20 is located on the side of the light guide assembly 30 away from the bottom plate 11 and abuts against the light guide assembly 30.

[0041] The pressure edge 20 is matched with the inner wall of the side plate 12 to limit the movement of the pressure edge 20 in the direction pointing towards the side plate 12.

[0042] The side plate 12 is provided with a first limiting structure 101, and the pressing edge 20 is provided with a second limiting structure 201. The first limiting structure 101 and the second limiting structure 201 cooperate to limit the movement of the pressing edge 20 along the direction of the side plate 12 pointing to the pressing edge 20.

[0043] In this embodiment of the utility model, by limiting the movement of the pressing edge 20 with the inner wall of the side plate 12, and by using the first limiting structure 101 and the second limiting structure 201 that limit each other, the movement of the pressing edge 20 can be restricted in two opposite directions toward or away from the side plate 12, reducing the degree of freedom of movement of the pressing edge 20. The degree of limiting cooperation between the back plate 10 and the pressing edge 20 is high, so that the pressing edge 20 can be stably installed on the back plate 10 and achieve a good supporting and limiting effect on the light guide component 30, thereby limiting the movement of the light guide component 30 relative to the back plate 10 and improving the structural stability and reliability of the backlight module 100.

[0044] Optionally, the side edge of the base plate 11, the side plate 12, and the pressing edge 20 are parallel to each other, and the pressing edge 20 is attached to the inner wall of the side plate 12.

[0045] In some embodiments, the first limiting structure 101 is a first limiting groove, and the second limiting structure 201 is a first limiting protrusion. The first limiting protrusion is inserted into the first limiting groove, and the first limiting groove is used to restrict the first limiting protrusion from disengaging from the first limiting groove in the direction from the side plate 12 to the pressing edge 20, thereby restricting the pressing edge 20 from moving in the direction from the side plate 12 to the pressing edge 20.

[0046] The limiting mechanism between the first limiting structure 101 and the second limiting structure 201 is achieved by plugging in, which facilitates the assembly between the back plate 10 and the pressure edge 20. Moreover, its structure is relatively simple and the cost is low.

[0047] It is understandable that, due to the tight fit between the pressure edge 20 and other structures within the accommodating cavity 110—for example, the gap between the outer side of the pressure edge 20 and the inner wall of the side plate 12 is very small or they directly abut against each other—and the inner side of the pressure edge 20 needs to fit with foam, a display screen, etc., if the first limiting structure 101 is set as a first limiting protrusion and the second limiting structure 201 is set as a first limiting groove, then when the first limiting protrusion is inserted into the first limiting groove, the first limiting protrusion needs to extend towards the pressure edge 20, causing the first limiting protrusion to occupy additional space in the accommodating cavity 110, which is not conducive to the tight fit of the various structures. Therefore, in this embodiment, by setting the first limiting structure 101 as a first limiting groove and the second limiting structure 201 as a first limiting protrusion, when the first limiting protrusion is inserted into the first limiting groove, the first limiting protrusion extends towards the side plate 12, avoiding the need for the first limiting protrusion to occupy additional space in the accommodating cavity 110, which is conducive to the tight fit of the structures within the accommodating cavity 110.

[0048] Of course, in some other embodiments, the first limiting structure 101 may also be a first limiting protrusion, and the second limiting structure 201 may also be a first limiting groove.

[0049] Please see Figure 4 In some embodiments, the first limiting groove includes a first groove 1011 and a second groove 1012. The second groove 1012 is located on the side of the first groove 1011 away from the receiving cavity 110. The first groove 1011 connects the second groove 1012 and the receiving cavity 110. The width of the second groove 1012 is greater than the width of the first groove 1011. The first limiting protrusion includes a first limiting part 2011 and a second limiting part 2012. The first limiting part 2011 is connected to the pressing edge 20, and the second limiting part 2012 is connected to the end of the first limiting part 2011 away from the pressing edge 20. The first limiting part 2011 is inserted into the first groove 1011, and the second limiting part 2012 is inserted into the second groove 1012. The width of the second limiting part 2012 is greater than the width of the first groove 1011. Thus, the second groove 1012 can restrict the second limiting part 2012 from disengaging from the second limiting groove in the direction from the second groove 1012 to the first groove 1011. That is, it restricts the first limiting protrusion from disengaging from the first limiting groove in the direction from the side plate 12 to the pressing edge 20.

[0050] By inserting the first limiting part 2011 and the second limiting part 2012 into the first groove 1011 and the second groove 1012 respectively, the first limiting protrusion can be accommodated as a whole, avoiding the first limiting protrusion occupying extra space on the side plate 12, making the structure between the side plate 12 and the pressing edge 20 more compact.

[0051] Specifically, when the pressing edge 20 tends to move in the direction of the side plate 12 pointing to the pressing edge 20, the pressing edge 20 will apply a force to the first limiting protrusion in the direction of the side plate 12 pointing to the pressing edge 20. At this time, the groove wall of the second groove 1012 adjacent to the first groove 1011 can abut against the second limiting part 2012 and cancel the force, thereby preventing the pressing edge 20 from moving in the direction of the side plate 12 pointing to the pressing edge 20.

[0052] In some embodiments, the width of the first limiting portion 2011 is adapted to the width of the first groove 1011, that is, the width of the first limiting portion 2011 is equal to or slightly smaller than the width of the first groove 1011. Thus, when the first limiting portion 2011 is inserted into the first groove 1011, the two opposite groove walls in the width direction of the first groove 1011 can restrict the first limiting portion 2011 from moving along the width direction. The width direction is parallel to the side of the base plate 11, that is, the first limiting portion 2011 can be restricted to be parallel to the side of the base plate 11, thereby restricting the pressing edge 20 from moving along the side of the base plate 11.

[0053] And / or, the width of the second limiting part 2012 is adapted to the width of the second groove 1012, that is, the width of the second limiting part 2012 is equal to or slightly smaller than the width of the second groove 1012. In this way, when the second limiting part 2012 is inserted into the second groove 1012, the two opposite groove walls in the width direction of the second groove 1012 can restrict the movement of the second limiting part 2012 along the width direction. The width direction is parallel to the side of the base plate 11, that is, the second limiting part 2012 can be restricted to be parallel to the side of the base plate 11, thereby restricting the movement of the pressing edge 20 along the side of the base plate 11.

[0054] In some embodiments, the first groove 1011 and the second groove 1012 are perpendicular to each other. The second groove 1012 extends from the end of the first groove 1011 away from the receiving cavity 110 and extends out to both sides of the first groove 1011. The first groove 1011 and the second groove 1012 are connected to form a T-shaped groove. The first limiting portion 2011 and the second limiting portion 2012 are perpendicular to each other. The second limiting portion 2012 extends from the end of the first limiting portion 2011 away from the pressing edge 20 and extends out to both sides of the first limiting portion 2011. The first limiting portion 2011 and the second limiting portion 2012 are connected to form a T-shaped protrusion. The T-shaped groove and the T-shaped protrusion are adapted to each other, and the T-shaped protrusion is inserted into the T-shaped groove.

[0055] Of course, in some other embodiments, the first limiting groove and the first limiting protrusion may also be in other shapes, as long as the first limiting groove and the first limiting protrusion can cooperate with each other to restrict the first limiting protrusion from moving along the side plate 12 toward the pressing edge 20. For example, the first limiting groove is a 7-shaped groove and the first limiting protrusion is a 7-shaped protrusion, and the 7-shaped groove and the 7-shaped protrusion are compatible.

[0056] In some embodiments, the first limiting groove is disposed on the side of the side plate 12 away from the bottom plate 11, and the first limiting protrusion is disposed on the side of the pressing edge 20 away from the bottom plate 11. In this way, the first limiting groove can be exposed on the side plate 12, and when the pressing edge 20 is accommodated in the accommodating cavity 110, the first limiting protrusion can be exposed in the accommodating cavity 110. This facilitates the alignment and insertion between the first limiting protrusion and the first limiting groove, and facilitates the assembly of the pressing edge 20 on the back plate 10.

[0057] Please see Figure 5 In some embodiments, the side plate 12 is provided with a third limiting structure 102, and the pressing edge 20 is provided with a fourth limiting structure 202. The third limiting structure 102 and the fourth limiting structure 202 cooperate to limit the movement of the pressing edge 20 along the side parallel to the bottom plate 11.

[0058] With the above settings, the movement of the pressing edge 20 can be restricted in the direction parallel to the side of the base plate 11, further reducing the degree of freedom of movement of the pressing edge 20, improving the limiting fit between the back plate 10 and the pressing edge 20, so that the pressing edge 20 can be more firmly installed on the back plate 10, and achieve a better supporting and limiting effect on the light guide component 30, so as to restrict the movement of the light guide component 30 relative to the back plate 10, further improving the structural stability and reliability of the backlight module 100.

[0059] In some embodiments, the third limiting structure 102 is a second limiting groove, and the fourth limiting structure 202 is a second limiting protrusion. The second limiting protrusion is inserted into the second limiting groove and restricts the second limiting protrusion from moving along the side parallel to the base plate 11.

[0060] The limiting mechanism between the third limiting structure 102 and the fourth limiting structure 202 is achieved by plugging in, which facilitates the assembly between the back plate 10 and the pressure edge 20. Moreover, its structure is relatively simple and the cost is low.

[0061] It is understandable that, due to the tight fit between the pressure edge 20 and other structures within the accommodating cavity 110—for example, the gap between the outer side of the pressure edge 20 and the inner wall of the side plate 12 is very small or they directly abut against each other—and the inner side of the pressure edge 20 needs to fit with foam, a display screen, etc., if the third limiting structure 102 is set as the second limiting protrusion and the fourth limiting structure 202 is set as the second limiting groove, then when the second limiting protrusion is inserted into the second limiting groove, the second limiting protrusion needs to extend towards the pressure edge 20, causing the second limiting protrusion to occupy additional space in the accommodating cavity 110, which is not conducive to the tight fit of the various structures. Therefore, in this embodiment, by setting the third limiting structure 102 as the second limiting groove and the fourth limiting structure 202 as the second limiting protrusion, when the second limiting protrusion is inserted into the second limiting groove, the second limiting protrusion extends towards the side plate 12, avoiding the need for the second limiting protrusion to occupy additional space in the accommodating cavity 110, which is conducive to the tight fit of the structures within the accommodating cavity 110.

[0062] Specifically, when the pressing edge 20 tends to move along the side parallel to the base plate 11, the pressing edge 20 will apply a force along the side parallel to the base plate 11 to the second limiting protrusion. At this time, the two opposite groove walls in the width direction of the second limiting groove can abut against the second limiting protrusion and cancel out the force, thereby preventing the pressing edge 20 from moving along the side parallel to the base plate 11.

[0063] Of course, in some other embodiments, the third limiting structure 102 may also be the second limiting protrusion, and the fourth limiting structure 202 may also be the second limiting groove.

[0064] In some embodiments, the third limiting structure 102 is disposed on the side of the side plate 12 away from the bottom plate 11, and the fourth limiting structure 202 is disposed on the side of the pressing edge 20 away from the bottom plate 11. In this way, the second limiting groove can be exposed on the side plate 12, and when the pressing edge 20 is accommodated in the accommodating cavity 110, the second limiting protrusion can be exposed in the accommodating cavity 110, thereby facilitating the alignment and insertion between the second limiting protrusion and the second limiting groove, and facilitating the assembly of the pressing edge 20 on the back plate 10.

[0065] Please see Figure 6 In some embodiments, the side plate 12 is provided with a fifth limiting structure 103, and the pressing edge 20 is provided with a sixth limiting structure 203. The fifth limiting structure 103 and the sixth limiting structure 203 cooperate to limit the pressing edge 20 from moving away from the bottom plate 11.

[0066] With the above settings, the movement of the pressing edge 20 can be restricted in the direction away from the base plate 11, further reducing the degree of freedom of movement of the pressing edge 20, improving the degree of limiting fit between the back plate 10 and the pressing edge 20, so that the pressing edge 20 can be more firmly installed on the back plate 10, and achieving a better supporting and limiting effect on the light guide component 30, thereby restricting the movement of the light guide component 30 relative to the back plate 10, and further improving the structural stability and reliability of the backlight module 100.

[0067] Furthermore, by combining the limiting cooperation of the first limiting structure 101 and the second limiting structure 201, as well as the limiting cooperation of the third limiting structure 102 and the fourth limiting structure 202, the pressing edge 20 can be completely confined to the back plate 10, preventing the pressing edge 20 from moving relative to the back plate 10, thereby ensuring the structural stability and reliability of the backlight module 100.

[0068] In some embodiments, the fifth limiting structure 103 is a third limiting groove, and the sixth limiting structure 203 is a third limiting protrusion. The third limiting protrusion is inserted into the third limiting groove and restricts the third limiting protrusion from moving away from the base plate 11.

[0069] The fifth limiting structure 103 and the sixth limiting structure 203 are connected by plugging to achieve the limiting cooperation, which can facilitate the assembly between the back plate 10 and the pressure edge 20. Moreover, its structure is relatively simple and the cost is low.

[0070] It is understandable that, due to the tight fit between the pressure edge 20 and other structures within the accommodating cavity 110—for example, the gap between the outer side of the pressure edge 20 and the inner wall of the side plate 12 is very small or they directly abut against each other—and the inner side of the pressure edge 20 needs to fit with foam, a display screen, etc., if the fifth limiting structure 103 is set as the third limiting protrusion and the sixth limiting structure 203 is set as the third limiting groove, then when the third limiting protrusion is inserted into the third limiting groove, the third limiting protrusion needs to extend towards the pressure edge 20, causing the third limiting protrusion to occupy additional space in the accommodating cavity 110, which is not conducive to the tight fit of the various structures. Therefore, in this embodiment, by setting the fifth limiting structure 103 as the third limiting groove and the sixth limiting structure 203 as the third limiting protrusion, when the third limiting protrusion is inserted into the third limiting groove, the third limiting protrusion extends towards the side plate 12, avoiding the need for the third limiting protrusion to occupy additional space in the accommodating cavity 110, which is conducive to the tight fit of the structures within the accommodating cavity 110.

[0071] Specifically, when the pressing edge 20 has a tendency to move away from the base plate 11, the pressing edge 20 will apply a force away from the base plate 11 to the third limiting protrusion. At this time, the groove wall of the third limiting groove away from the base plate 11 can abut against the third limiting protrusion and cancel out the force, thereby preventing the pressing edge 20 from moving away from the base plate 11.

[0072] Of course, in some other embodiments, the fifth limiting structure 103 may also be the third limiting protrusion, and the sixth limiting structure 203 may also be the third limiting groove.

[0073] In some embodiments, the pressure edge 20 is a metal pressure edge. Compared with the plastic pressure edge, the metal pressure edge has better structural strength, which is conducive to a stable connection between it and the back plate 10. It is not easy to fall off the back plate 10, and its thickness can also be made smaller, which is conducive to reducing its space occupation in the accommodating cavity 110, and can make the overall structure more compact.

[0074] The metal pressing edge 20 includes a pressing plate 21 and an abutting plate 22. The pressing plate 21 abuts against the light guide assembly 30, and the abutting plate 22 is connected to the side of the pressing plate 21 away from the light guide assembly 30. The abutting plate 22 abuts against the inner wall of the side plate 12. Thus, while the pressing plate 21 holds and limits the light guide assembly 30, the abutting plate 22 can form a limiting fit with the inner wall of the side plate 12.

[0075] The second limiting structure 201, the fourth limiting structure 202 and the fifth limiting structure 103 mentioned above are respectively disposed on the abutment plate 22.

[0076] In some embodiments, the base plate 11 is rectangular and there are four side plates 12. The four side plates 12 are respectively connected to the four sides of the base plate 11, and the base plate 11 and the four side plates 12 together define the receiving cavity 110.

[0077] There are four pressure edges 20. The four pressure edges 20 are connected end to end to form a rectangular frame and are housed in the receiving cavity 110. Each pressure edge 20 corresponds to a side plate 12 and abuts against the corresponding side plate 12.

[0078] In some embodiments, at least one pressing edge 20 is provided with the aforementioned second limiting structure 201, fourth limiting structure 202 and sixth limiting structure 203, and at least one side plate 12 is provided with the aforementioned first limiting structure 101, third limiting structure 102 and fifth limiting structure 103. The first limiting structure 101, third limiting structure 102 and fifth limiting structure 103 of one side plate 12 respectively engage with the second limiting structure 201, fourth limiting structure 202 and sixth limiting structure 203 of the corresponding pressing edge 20.

[0079] In some embodiments, the three pressure edges 20 are provided with the aforementioned second limiting structure 201, fourth limiting structure 202 and sixth limiting structure 203, and the three side plates 12 are provided with the aforementioned first limiting structure 101, third limiting structure 102 and fifth limiting structure 103.

[0080] Of course, in some other embodiments, each pressing edge 20 may be provided with the above-mentioned second limiting structure 201, fourth limiting structure 202 and sixth limiting structure 203, and each side may be provided with the above-mentioned first limiting structure 101, third limiting structure 102 and fifth limiting structure 103.

[0081] In some embodiments, the backlight module 100 further includes a light source disposed on one circumferential side of the light guide assembly 30. The light source is used to emit light to the light guide assembly 30, and the light guide assembly 30 is used to conduct the light to the display screen to provide backlight illumination for the display screen.

[0082] Please refer to the following: Figure 2 and Figure 6 In some embodiments, the light guide assembly 30 includes a reflective film 31, a light guide plate 32, a diffuser plate 33, a first brightness enhancement film 34, and a second brightness enhancement film 35. The reflective film 31, the light guide plate 32, the diffuser plate 33, the first brightness enhancement film 34, and the second brightness enhancement film 35 are stacked sequentially and are all housed in the receiving cavity 110. The reflective film 31 is opposite to the base plate 11, the second brightness enhancement film 35 is opposite to the pressing edge 20, and the light source is located on one circumferential side of the light guide plate 32.

[0083] The reflective film 31 is used to reflect the light leaking from the bottom of the light guide plate 32 back to the light guide plate 32, thereby improving the utilization rate of light and the overall brightness, which helps to reduce energy loss and improve the display effect; the light guide plate 32 is used to convert the light emitted by the light source into a surface light source and make the light as evenly distributed as possible throughout the display area; the diffuser plate 33 is used to scatter the light from the light guide plate 32, eliminate the phenomenon of uneven light, and thus achieve a more uniform lighting effect; the first brightness enhancement film 34 and the second brightness enhancement film 35 are used to converge the light and enhance the brightness of the front.

[0084] 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 back plate, a pressing edge, and a light guide assembly. 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 pressing edge and the light guide assembly are respectively accommodated in the accommodating cavity. The pressing edge is located on the side of the light guide assembly away from the bottom plate and abuts against the light guide assembly. The pressing edge is limited to the inner wall of the side plate to restrict the movement of the pressing edge in the direction pointing from the pressing edge to the side plate; The side plate is provided with a first limiting structure, and the pressing edge is provided with a second limiting structure. The first limiting structure and the second limiting structure cooperate to limit the movement of the pressing edge along the direction of the side plate pointing to the pressing edge.

2. The backlight module according to claim 1, characterized in that, The first limiting structure is a first limiting groove, and the second limiting structure is a first limiting protrusion. The first limiting protrusion is inserted into the first limiting groove, and the first limiting groove is used to restrict the first limiting protrusion from disengaging from the first limiting groove along the direction of the side plate towards the pressing edge.

3. The backlight module according to claim 2, characterized in that, The first limiting groove includes a first groove and a second groove. The second groove is located on the side of the first groove away from the receiving cavity. The first groove connects the second groove and the receiving cavity. The width of the second groove is greater than the width of the first groove. The first limiting protrusion includes a first limiting part and a second limiting part. The first limiting part is connected to the pressing edge, and the second limiting part is connected to the end of the first limiting part away from the pressing edge. The first limiting part is inserted into the first groove, and the second limiting part is inserted into the second groove. The width of the second limiting part is greater than the width of the first groove.

4. The backlight module according to claim 2, characterized in that, The first limiting groove is located on the side of the side plate away from the bottom plate, and the first limiting protrusion is located on the side of the pressing edge away from the bottom plate.

5. The backlight module according to claim 1, characterized in that, The side plate is provided with a third limiting structure, and the pressing edge is provided with a fourth limiting structure. The third limiting structure and the fourth limiting structure cooperate to limit the movement of the pressing edge along the long side of the side plate.

6. The backlight module according to claim 5, characterized in that, The third limiting structure is a second limiting groove, and the fourth limiting structure is a second limiting protrusion. The second limiting protrusion is inserted into the second limiting groove and restricts the second limiting protrusion from moving along the side parallel to the bottom plate.

7. The backlight module according to claim 5, characterized in that, The third limiting structure is located on the side of the side plate away from the bottom plate, and the fourth limiting structure is located on the side of the pressing edge away from the bottom plate.

8. The backlight module according to claim 1, characterized in that, The side plate is provided with a fifth limiting structure, and the pressing edge is provided with a sixth limiting structure. The fifth limiting structure and the sixth limiting structure cooperate to limit the movement of the pressing edge away from the base plate.

9. The backlight module according to claim 8, characterized in that, The fifth limiting structure is a third limiting groove, and the sixth limiting structure is a third limiting protrusion. The third limiting protrusion is inserted into the third limiting groove and restricts the third limiting protrusion from moving away from the base plate.

10. The backlight module according to claim 1, characterized in that, The pressing edge is a metal pressing edge, which includes a pressing plate and an abutting plate. The pressing plate abuts against the light guide assembly, and the abutting plate is connected to the side of the pressing plate away from the light guide assembly. The abutting plate abuts against the inner wall of the side plate.

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