Backlight module and display device

Abstract

This application provides a backlight module including a light-emitting element and a light guide plate. The light-emitting element is disposed on one side of the light guide plate. The backlight module also includes a reflective component and a brightness adjustment component. The reflective component is disposed on the bottom side of the light guide plate, and the brightness adjustment component is disposed on the side of the reflective component facing away from the light guide plate. The brightness adjustment component abuts against the reflective component to form at least one protrusion on the reflective component. The protrusion is used to scatter light directed to the bottom side of the light guide plate into the light guide plate, thereby disrupting the total internal reflection condition within the light guide plate. Consequently, the light within the portion of the light guide plate corresponding to the protrusion is emitted from the side of the light guide plate facing the display panel, increasing the brightness of the light-emitting side of the backlight module corresponding to the protrusion. The brightness adjustment component is also used to control the position and number of the protrusions, thereby controlling the brightness of the light-emitting side of the backlight module in zones, achieving a high-contrast display device, and the backlight module does not require a large number of LEDs. This application also provides a display device.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a backlight module and a display device having the backlight module. Background Technology

[0002] With the rapid development of display technology, self-emissive display devices have higher contrast ratios, which means that liquid crystal display devices that rely on backlight modules do not have the advantage of high contrast ratios.

[0003] In existing technologies, to achieve high-contrast liquid crystal display devices, the number of LEDs in the direct-lit backlight module can be increased and the brightness of the LEDs can be controlled in zones. However, the above technical solutions require a large number of LEDs, which increases the cost and power consumption of the backlight module.

[0004] Therefore, how to solve the problem of display devices that cannot simultaneously achieve high contrast and low cost in the existing technology is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a backlight module and a display device having the backlight module, which aims to solve the problem that the prior art cannot simultaneously achieve high contrast and low cost in display devices.

[0006] To address the aforementioned technical problems, this application provides a backlight module comprising a light-emitting element and a light guide plate. The light-emitting element is disposed on one side of the light guide plate. The backlight module further comprises a reflective component and a brightness adjustment component. The reflective component is disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The brightness adjustment component is disposed on the side of the reflective component facing away from the light guide plate. The brightness adjustment component is used to abut against a portion of the reflective component corresponding to its position to form at least one protrusion on the reflective component facing the light guide plate, and to control the position and number of the protrusion. The protrusion is used to scatter light incident on the bottom side of the light guide plate into the light guide plate.

[0007] In summary, the backlight module provided in this application, by forming protrusions on the bottom side of the light guide plate to scatter light incident on the bottom side of the light guide plate into the light guide plate, disrupts the total internal reflection condition within the light guide plate. Consequently, the light within the portion of the light guide plate corresponding to the protrusions is emitted from the side of the light guide plate facing the display panel, increasing the brightness of the portion of the backlight module corresponding to the protrusions. Furthermore, the brightness adjustment component can control the position and number of the protrusions, thereby enabling zoned control of the brightness of the light-emitting side of the backlight module, achieving a high-contrast display device. Simultaneously, the technical solution of this application does not require a large number of LEDs, resulting in lower implementation cost and power consumption. Therefore, the technical solution of this application achieves a high-contrast, low-cost display device.

[0008] In an exemplary embodiment, the brightness adjustment assembly includes a substrate, multiple supporting members, multiple deformable elements, and multiple limiting members. The substrate is disposed on the side of the reflective assembly facing away from the light guide plate, and multiple cutouts penetrating the substrate are formed on the substrate. Each cutout contains at least one supporting member, one deformable element, and one limiting member. The supporting member is disposed at the opening of the cutout facing the reflective assembly, the deformable element is disposed at one end of the supporting member facing away from the reflective assembly, and the limiting member is disposed around the deformable element and at the other end of the deformable element facing away from the supporting member. The deformable element is used to extend such that at least one supporting member extends out of the cutout to support a portion of the reflective assembly, and the limiting member is used to restrict the extension direction of the deformable element.

[0009] In an exemplary embodiment, the arrangement density of the plurality of cutout portions gradually increases in the direction away from the light-emitting element of the light guide plate.

[0010] In an exemplary embodiment, the deformable element is characterized by being made of a rare-earth super magnetostrictive material. The brightness adjustment assembly further includes multiple driving elements, each of the hollowed-out portions being provided with a driving element, and the driving elements surrounding the periphery of the limiting member. The driving elements are used to generate a magnetic field, which is used to drive the deformable element to extend.

[0011] In an exemplary embodiment, the brightness adjustment component further includes a plurality of heat-conducting elements, and each of the hollow portions is provided with a heat-conducting element. The heat-conducting elements surround the periphery of the driving member and are connected to a portion of the inner wall of the hollow portion.

[0012] In an exemplary embodiment, the backlight module further includes a back plate, which includes a first back plate disposed on the side of the substrate opposite to the reflective component. The first back plate has multiple mounting holes penetrating through it, the positions of which correspond one-to-one with the positions of the multiple cutouts, and the mounting holes communicate with the corresponding cutouts. The backlight module also includes multiple height adjustment components, each mounted in a mounting hole. The height adjustment component is located at the end of the limiting member opposite to the supporting member, and is used to adjust the height of the supporting member.

[0013] In an exemplary embodiment, each height adjustment component includes a support member and a rotating member, both located within the mounting hole. The support member is disposed at the end of the limiting member opposite to the abutment member, and the rotating member is disposed at the end of the support member opposite to the limiting member. The support member is threadedly connected to the mounting hole. The rotating member is used to rotate and drive the support member to rotate, thereby adjusting the height of the abutment member.

[0014] In an exemplary embodiment, the reflective component includes a reflective layer disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The brightness adjustment component abuts against a portion of the reflective layer corresponding to the position of the brightness adjustment component to form at least one first protrusion on the reflective layer protruding toward the light guide plate. The first protrusion is used to reflect the light rays incident on the bottom side of the light guide plate into the light guide plate.

[0015] In an exemplary embodiment, the reflective component includes a reflective layer and a refractive layer. The refractive layer is disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The reflective layer is disposed on the side of the refractive layer opposite to the light guide plate. The brightness adjustment component abuts against a portion of the reflective layer to form at least one first protrusion protruding towards the light guide plate on the reflective layer. The first protrusion abuts against the refractive layer to form a second protrusion protruding towards the light guide plate on the refractive layer. The second protrusion refracts light rays incident on the bottom side of the light guide plate to the first protrusion, the first protrusion reflects the light rays refracted to the first protrusion to the second protrusion, and the second protrusion further refracts the light rays reflected from the first protrusion to the second protrusion into the light guide plate.

[0016] Based on the same inventive concept, this application also provides a display device, which includes a display panel and the aforementioned backlight module, wherein the display panel is disposed on the light-emitting side of the backlight module.

[0017] In summary, the display device provided in this application includes a display panel and a backlight module. The backlight module, by forming protrusions on the bottom side of the light guide plate to scatter light incident on the bottom side of the light guide plate into the light guide plate, disrupts the total internal reflection condition within the light guide plate. Consequently, the light within the portion of the light guide plate corresponding to the protrusions is emitted from the side of the light guide plate facing the display panel, increasing the brightness of the portion of the backlight module corresponding to the protrusions. Furthermore, the brightness adjustment component can control the position and number of the protrusions, thereby enabling zoned control of the brightness of the light-emitting side of the backlight module, achieving a high-contrast display device. Simultaneously, the technical solution of this application does not require a large number of LEDs, resulting in lower implementation cost and power consumption. Therefore, the technical solution of this application achieves a high-contrast and low-cost display device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the layer structure of the display device disclosed in the first embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the layer structure of the backlight module disclosed in the second embodiment of this application;

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of structure III in the backlight module shown;

[0022] Figure 4 for Figure 2 An enlarged schematic diagram of structure IV in the backlight module shown;

[0023] Figure 5 This is a schematic diagram illustrating the working principle of the reflective component disclosed in the second embodiment of this application;

[0024] Figure 6 This is a schematic diagram of a first distribution of the display area of ​​the display panel disclosed in the second embodiment of this application;

[0025] Figure 7 This is a schematic diagram of a second distribution of the display area of ​​the display panel disclosed in the second embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the layer structure of the backlight module disclosed in the third embodiment of this application;

[0027] Figure 9 for Figure 8 An enlarged schematic diagram of structure VIIII in the backlight module shown;

[0028] Figure 10 for Figure 8 A schematic diagram of the first top view of the substrate shown;

[0029] Figure 11 for Figure 8 The diagram shows a second top view of the substrate.

[0030] Explanation of reference numerals in the attached figures:

[0031] 001-First direction; 002-Second direction; 10-Display panel; 11-Display area; 11a-Sub-display area; 12-Non-display area; 30-Backlight module; 30a-Backlight module; 31-Back panel; 32-Light-emitting element; 33-Light guide plate; 34-Reflective component; 34a-Protrusion; 35-Brightness adjustment component; 36-Height adjustment component; 37-Magnetic shielding component; 38-Optical film assembly; 100-Display device; 311-First back panel; 311a-Security shielding component 312-Second back plate; 313-Third back plate; 341-Reflective layer; 341a-First protrusion; 342-Refracting layer; 342a-Second protrusion; 351-Substrate; 351a-Koilout; 352-Holding member; 353-Deformation element; 354-Limiting member; 356-Driving member; 357-Heat-conducting member; 361-Supporting member; 362-Rotating member; 381-Diffuser sheet; 382-Prism sheet; a1-First receiving hole; a2-Second receiving hole. Detailed Implementation

[0032] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0033] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. The component designations used herein, such as "first," "second," etc., are merely for distinguishing the described objects and do not have any sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). Directional terms used in this application, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," "side," etc., are merely for reference to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising," "may include," "include," or "may include" used in this application indicate the presence of the corresponding disclosed function, operation, element, etc., and do not limit one or more other functions, operations, elements, etc. Moreover, the terms "comprising" or "include" indicate the presence of the corresponding features, number, steps, operations, elements, components, or combinations thereof disclosed in the specification, but do not exclude the presence or addition of one or more other features, number, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusion. It is also important to understand that “at least one” as described in this article means one or more, such as one, two or three, while “multiple” means at least two, such as two or three, unless otherwise explicitly specified.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0036] Please see Figure 1 , Figure 1This is a schematic diagram of the layer structure of the display device disclosed in the first embodiment of this application. In this embodiment, the display device 100 may include a display panel 10 and a backlight module 30. The display panel 10 is disposed on the light-emitting side of the backlight module 30, and the display panel 10 is used to display images under the backlight provided by the backlight module 30.

[0037] In this embodiment of the application, the display panel 10 includes a color filter substrate, a liquid crystal layer and an array substrate stacked sequentially, that is, the liquid crystal layer is located between the color filter substrate and the array substrate. The color filter substrate and the array substrate form a corresponding preset electric field according to the image signal. The preset electric field drives the liquid crystal molecules in the liquid crystal layer to deflect to change the transmittance of the liquid crystal layer, so that the display panel 10 displays different grayscale brightness.

[0038] In an exemplary embodiment, the display panel 10 further includes an upper polarizer and a lower polarizer. The upper polarizer is disposed on the side of the color filter substrate facing away from the array substrate, and the lower polarizer is disposed on the side of the array substrate facing away from the color filter substrate. The upper polarizer and the lower polarizer are used to convert natural light backlight into polarized light backlight. The backlight provided by the backlight module 30 passes sequentially through the lower polarizer, the array substrate, the liquid crystal layer, the color filter substrate, and the upper polarizer.

[0039] In an exemplary embodiment, the display panel 10 may be a twisted nematic (TN) display panel, a vertical alignment (VA) display panel, an in-plane switching (IPS) display panel, or a fringe field switching (FFS) display panel, and this application does not impose any specific limitations on it.

[0040] Understandably, the display device 100 can be used in electronic devices including but not limited to televisions, tablets, laptops, desktop computers, mobile phones, in-vehicle displays, smartwatches, smart bracelets, and smart glasses. According to embodiments of this application, the specific type of the display device 100 is not particularly limited, and those skilled in the art can design it accordingly based on the specific usage requirements of the display device 100; further details will not be elaborated here.

[0041] In an exemplary embodiment, the display device 100 may also include other necessary components and parts such as a driver board, a power board, a high-voltage board, and a button control board. Those skilled in the art can make corresponding additions according to the specific type and actual function of the display device 100, which will not be elaborated here.

[0042] Please see Figure 2 , Figure 2 This is a schematic diagram of the layer structure of the backlight module disclosed in the second embodiment of this application. The backlight module 30 includes a back plate 31, a light-emitting element 32, and a light guide plate 33. The light-emitting element 32 and the light guide plate 33 are disposed within the back plate 31. The light-emitting element 32 is disposed on one side of the light guide plate 33 and is spaced apart from the light guide plate 33. The light guide plate 33 is used to convert the horizontal incident light emitted by the light-emitting element 32 into vertical outgoing light, that is, the light guide plate 33 is used to guide the light emitted by the light-emitting element 32 to the light-emitting side of the backlight module 30. In other words, the light guide plate 33 is located within the back plate 31, and the light-emitting element 32 is disposed on the inner side of the back plate 31, corresponding to one side of the light guide plate 33, and spaced apart from that side of the light guide plate 33 by a predetermined distance.

[0043] Please refer to the embodiments described in this application as well. Figure 2 , Figure 3 and Figure 4 , Figure 3 for Figure 2 The diagram shows an enlarged view of structure III in the backlight module. Figure 4 for Figure 2 The diagram shows an enlarged view of structure IV in the backlight module. The backlight module 30 also includes a reflective component 34 and a brightness adjustment component 35. The reflective component 34 is disposed on the bottom side of the light guide plate 33, that is, on the side of the light guide plate 33 facing away from the display panel 10, and the reflective component 34 and the light guide plate 33 are spaced apart. The brightness adjustment component 35 is disposed on the side of the reflective component 34 facing away from the light guide plate 33. The brightness adjustment component 35 is used to abut against the portion of the reflective component 34 corresponding to its position to form at least one protrusion 34a on the reflective component 34 facing the light guide plate 33, and to control the position and number of the protrusions 34a. Light passing through the bottom side of the light guide plate 33 will be directed towards the reflective component 34, and the protrusions 34a are used to scatter the light directed towards the bottom side of the light guide plate 33 into the light guide plate 33. Here, scattering means that the light is directed in various directions. Figure 3 The protrusion 34a is formed on the reflective component 34. Figure 4 The reflective component 34 in the image does not have the plurality of protrusions 34a formed on it. For example... Figure 1 and Figure 2As shown, the bottom side of the light guide plate 33 refers to the lower surface of the light guide plate 33 facing away from the display panel 10, and the upper surface facing the display panel 10 is opposite to it. The light guide plate 33 also has a peripheral side surface connecting the upper surface and the lower surface. The peripheral side surface may include multiple sides. The light-emitting element 32 is disposed inside the back plate 31 and corresponds to one of the sides of the light guide plate 33, and is spaced at a predetermined distance from that side surface.

[0044] It is understandable that some of the light within the light guide plate 33 cannot escape from the side of the light guide plate 33 facing the display panel 10 due to total internal reflection. By forming protrusions 34a on the bottom side of the light guide plate 33 to scatter the light incident on the bottom side of the light guide plate 33 into the light guide plate 33, the total internal reflection condition within the light guide plate 33 can be disrupted. Consequently, the light within the portion of the light guide plate 33 corresponding to the protrusions 34a all escapes from the side of the light guide plate 33 facing the display panel 10, improving the brightness of the portion of the backlight module 30 corresponding to the protrusions 34a. Furthermore, the brightness adjustment component 35 can also control the position and number of the protrusions 34a, thereby enabling zoned control of the brightness of the backlight module 30's light-emitting side, thus achieving a high-contrast display device 100. For example, if two adjacent sub-display areas of the display panel 10 require one high-brightness display (i.e., a high-brightness sub-display area) and one low-brightness display (i.e., a low-brightness sub-display area), multiple protrusions 34a corresponding to the positions of the high-brightness sub-display areas can be formed on the bottom side of the light guide plate 33, thus resulting in higher brightness for the high-brightness sub-display area. Conversely, no protrusions 34a are formed on the bottom side of the light guide plate 33 corresponding to the positions of the low-brightness sub-display areas, resulting in lower brightness for the low-brightness sub-display areas. This achieves a high-contrast display device 100. The more protrusions 34a corresponding to a sub-display area, the brighter the sub-display area. Furthermore, compared to the high-contrast method mentioned in the background art, which uses a large number of LEDs, the technical solution of this application achieves high contrast at a lower cost and consumes less power. In summary, the technical solution of this application achieves a high-contrast and low-cost display device 100.

[0045] It is also understood that the portion of the reflective component 34 without the protrusion 34a can reflect the light directed toward the bottom side of the light guide plate 33 into the light guide plate 33, thereby improving the utilization rate of the light.

[0046] In an exemplary embodiment, the height of the protrusion 34a can be from 400um to 1000um, for example, 400um, 480um, 550um, 630um, 800um, 900um, 1000um, or other values. The height range of the protrusion 34a is only required to satisfy the condition that the light scattered by the protrusion 34a can destroy total internal reflection. This application does not impose any specific limitations on this.

[0047] In an exemplary embodiment, the diameter of the end of the protrusion 34a facing away from the reflective component 34 is between 600 μm and 1000 μm, for example, 600 μm, 670 μm, 720 μm, 800 μm, 850 μm, 910 μm, 1000 μm, or other values. This application does not impose specific limitations on this. It is understood that if the diameter of the end of the protrusion 34a facing away from the reflective component 34 is greater than 1000 μm, the contact area between the protrusion 34a and the light guide plate 33 may be larger, which is not conducive to scattering the light and may result in uneven light emission on the side of the light guide plate 33 facing the display panel 10.

[0048] In one implementation method of this application, please refer to Figures 3 to 5 , Figure 5 This is a schematic diagram illustrating the working principle of the reflective component disclosed in the second embodiment of this application. Figure 5 The arrows in the diagram indicate the direction of light propagation. The reflective component 34 includes a reflective layer 341, which is disposed on the bottom side of the light guide plate 33, that is, on the side of the light guide plate 33 facing away from the display panel 10. The reflective layer 341 is spaced apart from the light guide plate 33, and the reflective layer 341 is used to reflect the light from the light guide plate 33.

[0049] In this embodiment of the application, the brightness adjustment component 35 abuts against a portion of the reflective layer 341 to form at least one first protrusion 341a on the reflective layer 341 protruding toward the light guide plate 33. The first protrusion 341a is used to reflect the light incident on the bottom side of the light guide plate 33 into the light guide plate 33.

[0050] In another embodiment of this application, please refer to Figures 3 to 5The reflective component 34 includes a reflective layer 341 and a refractive layer 342. The refractive layer 342 is disposed on the bottom side of the light guide plate 33, that is, on the side of the light guide plate 33 facing away from the display panel 10, and the refractive layer 342 and the light guide plate 33 are spaced apart. The reflective layer 341 is disposed on the side of the refractive layer 342 facing away from the light guide plate 33. The reflective layer 341 is used to reflect the light, and the refractive layer 342 is used to refract the light. The brightness adjustment component 35 abuts against the portion of the reflective layer 341 corresponding to the position of the brightness adjustment component 35 to form at least one first protrusion 341a on the reflective layer 341 protruding towards the light guide plate 33. The first protrusion 341a abuts against the refractive layer 342 to form a second protrusion 342a on the refractive layer 342 protruding towards the light guide plate 33. The second protrusion 342a is positioned corresponding to the first protrusion 341a. The second protrusion 342a refracts light rays incident on the bottom side of the light guide plate 33 to the first protrusion 341a. The first protrusion 341a reflects the light rays refracted to it back to the second protrusion 342a. The second protrusion 342a also refracts the light rays reflected from the first protrusion 341a back into the light guide plate 33. That is, when the second protrusion 342a refracts light rays to the first protrusion 341a, its function is to concentrate the light rays, allowing more light rays to strike the first protrusion 341a. When the second protrusion 342a refracts light rays into the light guide plate 33, its function is to disperse the light rays, improving the scattering effect of the protrusion 341a. Each of the protrusions 34a includes a first protrusion 341a and a second protrusion 342a.

[0051] It is understood that the reflective component 34 may include only the reflective layer 341, or it may include the reflective layer 341 and the refractive layer 342. This application does not impose any specific limitations on this.

[0052] In an exemplary embodiment, the surfaces of the first protrusion 341a facing the second protrusion 342a, the surfaces of the first protrusion 341a facing away from the second protrusion 342a, the surfaces of the second protrusion 342a facing the first protrusion 341a, and the surfaces of the second protrusion 342a facing away from the first protrusion 341a are all curved surfaces. The curved surface of the first protrusion 341a facing the second protrusion 342a (i.e., the reflective surface of the first protrusion 341a) means that the normal to the reflective surface of the first protrusion 341a varies at different positions, which can improve the scattering effect of the protrusion 34a. Furthermore, the curved surface of the first protrusion 341a facing away from the second protrusion 342a can prevent the first protrusion 341a from scratching the light guide plate 33.

[0053] In an exemplary embodiment, the material of the reflective layer 341 may include metallic silver or other materials with good reflective properties, and this application does not impose specific limitations on this. The material of the refractive layer 342 may include polyvinyl chloride (PVC) or other materials with good transparency and high refractive index, and this application does not impose specific limitations on this. Both the reflective layer 341 and the refractive layer 342 have good ductility, which allows the first protrusion 341a to be formed on the reflective layer 341 and the second protrusion 342a to be formed on the refractive layer 342.

[0054] In the embodiments of this application, please refer to Figure 3 and Figure 4 The brightness adjustment component 35 includes a substrate 351, which is disposed on the side of the reflective component 34 facing away from the light guide plate 33. The substrate 351 has multiple perforated portions 351a extending through it, and the depth direction of the perforated portions 351a is parallel to the direction of the substrate 351 facing away from the reflective component 34.

[0055] In the embodiments of this application, please refer to Figure 3 and Figure 4The brightness adjustment component 35 further includes multiple supporting members 352, multiple deformable elements 353, and multiple limiting members 354. Each hollow portion 351a is provided with at least one supporting member 352, one deformable element 353, and one limiting member 354. The supporting member 352 is disposed at the opening of the hollow portion 351a facing the reflective component 34. The deformable element 353 is disposed at one end of the supporting member 352 opposite to the reflective component 34, and one end of the deformable element 353 is connected to the supporting member 352. The limiting member 354 is disposed on the periphery of the deformable element 353 and at the other end of the deformable element 353 opposite to the supporting member 352. The deformable element 353 is used to extend so that at least one supporting member 352 extends out of the hollow portion 351a to support part of the reflective component 34, thereby forming the protrusion 34a on the reflective component 34. The limiting member 354 is used to restrict the elongation direction of the deformation element 353, so that the deformation element 353 elongates toward the reflective assembly 34.

[0056] In an exemplary embodiment, the deformation element 353 is used to elongate so that the abutment 352 extends out of the cutout portion 351a to abut against a portion of the reflective layer 341, thereby forming the first protrusion 341a on the reflective layer 341. The surface of the abutment 352 facing the reflective layer 341 may be a curved surface.

[0057] In an exemplary embodiment, the material of the supporting member 352 may include polyetherketone ketone (PEKK) or other insulating materials with a certain degree of hardness and good thermal insulation properties; this application does not impose specific limitations on this. The material of the limiting member 354 may include materials with good thermal conductivity.

[0058] In an exemplary embodiment, the hollow portion 351a may be a cylindrical or prismatic hole, and this application does not impose specific limitations on it. The deformable element 353 may be cylindrical or prismatic, and the shape of the deformable element 353 is adapted to the shape of the hollow portion 351a.

[0059] In an exemplary embodiment, the overall shape of the abutment 352 may be hemispherical, semi-ellipsoidal, spherical cap, or cylindrical, and this application does not impose specific limitations in this regard. The surface of the abutment 352 facing the reflective component 34 is arc-shaped. The physical properties of the abutment 352, such as its structure, size, volume, and density, can be determined according to actual needs, and this application does not impose specific limitations in this regard.

[0060] In an exemplary embodiment, the periphery of the deformable element 353 may be clearance-fitted with the inner sidewall of the limiting member 354 to prevent the inner sidewall of the limiting member 354 from affecting the deformation (mainly elongation or shortening) of the deformable element 353. The end of the deformable element 353 facing away from the abutment 352 may be fixedly connected to the inner bottom of the limiting member 354 to prevent the end of the deformable element 353 facing away from the abutment 352 from contracting towards the reflective assembly 34.

[0061] In the embodiments of this application, please refer to Figure 3 and Figure 4 The brightness adjustment component 35 further includes a plurality of driving members 356. Each of the hollow portions 351a is provided with a driving member 356, and the driving member 356 surrounds the periphery of the limiting member 354. The driving member 356 is used to form a magnetic field, and the magnetic field is used to drive the deformation element 353 to extend.

[0062] In an exemplary embodiment, the material of the deformation element 353 may include a rare-earth giant magnetostrictive material (GMM), thereby giving the deformation element 353 good magnetostrictive properties, meaning that the deformation element 353 can expand rapidly under the action of the magnetic field. Due to the limiting effect of the limiting member 354, the deformation element 353 elongates in the direction of the reflecting component 34. The greater the strength of the magnetic field, the greater the elongation of the deformation element 353. When the magnetic field disappears, the driving member 356 returns to its original shape. The driving member 356 may be a spiral conductive coil, and the material of the driving member 356 may include metals, such as copper. The driving member 356 generates a magnetic field after conducting electricity.

[0063] In this embodiment of the application, the brightness adjustment component 35 further includes a plurality of heat-conducting elements 357. Each of the hollowed-out portions 351a is provided with one heat-conducting element 357. The heat-conducting element 357 surrounds the periphery of the driving member 356 and is connected to a portion of the inner wall of the hollowed-out portion 351a. The heat-conducting element 357 is used for heat conduction.

[0064] It is understood that the driving component 356 will generate heat after being powered on, and the heat-conducting component 357 is connected between the driving component 356 and the inner wall of the hollow portion 351a to conduct the heat on the driving component 356 to the substrate 351. The material of the heat-conducting component 357 may include thermal grease, thermal silicone, or other materials with good thermal conductivity.

[0065] It is also understood that the material of the limiting member 354 may include a material with good thermal conductivity, and the end of the limiting member 354 facing the reflective assembly 34 may be connected to a portion of the inner wall of the hollow portion 351a. The deformation element 353 also generates heat under the action of the magnetic field, and the limiting member 354 can conduct the heat on the deformation element 353 to the substrate 351.

[0066] In the embodiments of this application, please refer to Figure 3 and Figure 4 The cutout portion 351a includes a first receiving hole a1 and a second receiving hole a2 that are connected. The first receiving hole a1 is the opening of the cutout portion 351a facing the reflective component 34, and the remaining portion of the cutout portion 351a is the second receiving hole a2. That is, the first receiving hole a1 is opened on the side of the substrate 351 facing the reflective component 34, and the second receiving hole a2 is opened on the side of the substrate 351 facing away from the reflective component 34. The diameter of the second receiving hole a2 is larger than the diameter of the first receiving hole a1. When the driving member 356 does not form the magnetic field, that is, when the deformation element 353 is not deformed, a supporting member 352 is located in the first receiving hole a1 and is in clearance fit with the first receiving hole a1. A deformation element 353, a limiting member 354, a driving member 356, and a heat-conducting member 357 are disposed within the second receiving hole a2, and the heat-conducting member 357 is connected to the inner wall of the second receiving hole a2. When the driving member 356 generates the magnetic field, one end of the deformation element 353 facing the abutment member 352 extends into the first receiving hole a1, causing the abutment member 352 to extend out of the first receiving hole a1.

[0067] In an exemplary embodiment, the inner wall of the limiting member 354 is aligned with the inner wall of the first receiving hole a1.

[0068] In the embodiments of this application, please refer to Figure 2 and Figure 3 The arrangement density of the plurality of hollow portions 351a gradually increases in the direction away from the light-emitting element 32 on the light guide plate 33, that is, the arrangement density of the plurality of supporting members 352 gradually increases in the direction away from the light-emitting element 32 on the light guide plate 33. Correspondingly, if each supporting member 352 abuts against the reflective assembly 34 and forms a plurality of protrusions 34a, the arrangement density of the plurality of protrusions 34a gradually increases in the direction away from the light-emitting element 32 on the light guide plate 33.

[0069] It is understood that the brightness within the light guide plate 33 gradually decreases in the direction away from the light-emitting element 32. Therefore, a smaller number of the cutout portions 351a and their internal components are provided for the brighter portions within the light guide plate 33, while a larger number of the cutout portions 351a and their internal components are provided for the less bright portions within the light guide plate 33. This helps improve the uniformity of the light emitted from the side of the light guide plate 33 facing the display panel 10, avoids the need for a large number of cutout portions 351a and their internal components to be provided for the brighter portions within the light guide plate 33, saves on the number of cutout portions 351a and their internal components, and reduces costs.

[0070] In the embodiments of this application, please refer to Figure 1 and Figure 2 The back panel 31 includes a first back panel 311 and a second back panel 312. The second back panel 312 surrounds the periphery of the first back panel 311, that is, the second back panel 312 surrounds the periphery of the upper surface of the first back panel 311. The second back panel 312 extends toward the side of the first back panel 311, that is, it extends toward the direction of the display panel 10. The brightness adjustment component 35 is disposed on the side of the first back panel 311 facing the second back panel 312 and is located inside the second back panel 312. The reflective component 34 is disposed on the side of the brightness adjustment component 35 opposite to the first back panel 311 and is located inside the second back panel 312. The light guide plate 33 is disposed on the side of the reflective component 34 opposite to the brightness adjustment component 35 and is located inside the second back panel 312. The light-emitting element 32 is disposed on a portion of the inner sidewall of the second back panel 312.

[0071] In an exemplary embodiment, the first backplate 311 is disposed on the side of the substrate 351 opposite to the reflective assembly 34.

[0072] In an exemplary embodiment, the first backplate 311 may be a plate-like structure, and the second backplate 312 may be a hollow frame structure. The second backplate 312 includes four side plates, and the light-emitting element 32 is disposed on the inner side of one side plate of the second backplate 312, corresponding to one side edge of the light guide plate 33.

[0073] In the embodiments of this application, please refer to Figure 3 and Figure 4The first backplate 311 has multiple mounting holes 311a penetrating through it. The positions of the mounting holes 311a correspond one-to-one with the positions of the multiple cutouts 351a, meaning that the orthographic projections of the mounting holes 311a onto the first backplate 311 coincide one-to-one or partially one-to-one with the orthographic projections of the cutouts 351a onto the first backplate 311. The mounting holes 311a communicate with their corresponding cutouts 351a. The backlight module 30 also includes multiple height adjustment components 36, one of which is disposed within each mounting hole 311a. Each height adjustment component 36 is located at the end of the limiting member 354 opposite to the supporting member 352, and is used to adjust the height of the supporting member 352. The height of the supporting member 352 is based on the surface of the first backplate 311 facing the substrate 351.

[0074] It is understandable that, due to manufacturing process limitations or prolonged use of the brightness adjustment component 35, the heights of the multiple supporting members 352 may differ when the deformation element 353 has not elongated. Therefore, the height adjustment component 36 can be used to make the heights of the multiple supporting members 352 the same. Simultaneously, when a portion of the display area requires consistently high brightness, the height of the supporting member 352 can be adjusted by the brightness adjustment component 35 so that the supporting member 352 abuts against the reflective component 34, forming multiple protrusions 34a corresponding to that portion of the display area. Thus, that portion of the display area can maintain consistently high brightness without the need to generate the magnetic field. When one of the driving components 356 is damaged, the height adjustment component 36 can also be used to push the supporting member 352 towards the reflective component to form the protrusions 34a.

[0075] In the embodiments of this application, please refer to Figure 3 and Figure 4 The height adjustment assembly 36 includes a support member 361 and a rotating member 362. Both the support member 361 and the rotating member 362 are located within the mounting hole 311a. The support member 361 is disposed at the end of the limiting member 354 opposite to the abutment member 352, and the rotating member 362 is disposed at the end of the support member 361 opposite to the limiting member 354. The support member 361 is threadedly connected to the mounting hole 311a, and the support member 361 and the rotating member 362 are detachably connected. The rotating member 362 is used to rotate and drive the support member 361 to rotate, thereby adjusting the height of the end of the support member 361 facing the limiting member 354, and thus adjusting the height of the abutment member 352.

[0076] It is understandable that by connecting the support member 361 to the mounting hole 311a via a threaded connection, the greater the angle at which the support member 361 rotates, the greater the increase in the height of the support member 361 facing the limiting member 354; conversely, the smaller the angle at which the support member 361 rotates, the less the increase in the height of the support member 361 facing the limiting member 354. This facilitates precise adjustment of the height of the abutment member 352 and allows for a more flexible adjustment range.

[0077] In an exemplary embodiment, the support member 361 and the rotating member 362 can also be connected by threads, and the rotating member 362 can be a hexagonal bolt. The material of the support member 361 may include a material with good thermal conductivity to dissipate heat from the limiting member 354. The support member 361 may be integrally formed with the limiting member 354.

[0078] In an exemplary embodiment, the diameter of the second receiving hole a2 is larger than the diameter of the mounting hole 311a, and the inner wall of the mounting hole 311a is aligned with the outer side of the limiting member 354.

[0079] In an exemplary embodiment, the end of the driving member 356 facing away from the reflective component 34 and the end of the heat-conducting member 357 facing away from the reflective component 34 are both connected to the surface of the first back plate 311 facing the substrate 351.

[0080] In an exemplary implementation, please refer to Figure 2 The backlight module 30 further includes a magnetically insulating component 37, which is disposed on the side of the first back plate 311 facing the second back plate 312, and surrounds the periphery of the reflective component 34 and the periphery of the brightness adjustment component 35. The outer side of the magnetically insulating component 37 is connected to the inner side of the second back plate 312, the peripheral side of the substrate 351 is connected to the inner side of the magnetically insulating component 37, and the peripheral side of the reflective component 34 is connected to the inner side of the magnetically insulating component 37. The periphery of the light guide plate 33 is disposed on the side of the magnetically insulating component 37 opposite to the first back plate 311.

[0081] In an exemplary embodiment, the material of the magnetic shielding component 37 includes a material with good magnetic shielding properties to isolate the magnetic field generated by the driving component 356. The material of the magnetic shielding component 37 may also include a material with good thermal conductivity to conduct heat on the substrate 351 to the first back plate 311 and the second back plate 312.

[0082] In an exemplary embodiment, the magnetic shielding component 37, the first back plate 311, and the second back plate 312 may be integrally formed, or the magnetic shielding component 37 and the substrate 351 may be integrally formed.

[0083] In an exemplary embodiment, the magnetic shielding component 37 may be a hollow frame structure. The surface of the magnetic shielding component 37 facing away from the first back plate 311 and the inner surface of the magnetic shielding component 37 may be coated with a reflective material to reflect the light incident on the magnetic shielding component 37 to the light guide plate 33, thereby improving the utilization rate of the light.

[0084] In the embodiments of this application, please refer to Figure 1 and Figure 2 The back panel 31 further includes a third back panel 313, which is disposed on the side of the second back panel 312 opposite to the first back panel 311, and the side of the second back panel 312 opposite to the first back panel 311 surrounds the periphery of the third back panel 313. The display panel 10 is disposed on the side of the third back panel 313 opposite to the second back panel 312. The second back panel 312 may be connected to the periphery of the lower surface of the third back panel 313.

[0085] In an exemplary embodiment, the third backplate 313 may be a hollow frame structure.

[0086] In this embodiment of the application, the backlight module 30 further includes an optical film assembly 38, which is disposed on the side of the light guide plate 33 opposite to the reflective component 34 and located inside the second back plate 312. The optical film assembly 38 is used to brighten the light and make the light more uniform.

[0087] In an exemplary embodiment, the optical film assembly 38 includes at least one diffuser 381 and at least one prism sheet 382. The diffuser 381 is disposed on the side of the light guide plate 33 opposite to the reflector 34, and the prism sheet 382 is disposed on the side of the diffuser 381 opposite to the light guide plate 33. The diffuser 381 is used to make the light more uniform, and the prism sheet 382 is used to increase the brightness of the light.

[0088] In an exemplary embodiment, the third back plate 313 is disposed on the side of the periphery of the prism sheet 382 facing away from the diffuser sheet 381, and the prism sheet 382 is not covered by the third back plate 313 except for the peripheral portion of the prism sheet 382.

[0089] In this embodiment, the backlight module 30 further includes a drive control unit (not shown). The drive control unit is electrically connected to a plurality of drive members 356. The drive control unit is used to output drive signals to the drive members 356. The drive signals flow from one end of the drive member 356 to the other end of the drive member 356 to form the electric field. The one end and the other end of the drive member 356 refer to the end of the drive member 356 facing the reflective component 34 and the end of the drive member 356 facing away from the reflective component 34.

[0090] Understandably, for example, if two adjacent sub-display areas of the display panel 10 require one high-brightness display (i.e., a high-brightness sub-display area) and one low-brightness display (i.e., a low-brightness sub-display area), the drive control unit can output drive signals to multiple drive members 356 corresponding to the high-brightness sub-display area, causing the drive members 356 to drive the deformation element 353 to extend, thereby forming multiple protrusions 34a corresponding to the high-brightness sub-display area. The backlight module 30 provides a strong backlight to the high-brightness sub-display area, thus achieving a high-brightness display. Alternatively, if the drive control unit does not output drive signals to the multiple drive members 356 corresponding to the low-brightness sub-display area, the backlight module 30 provides a weak backlight to the high-brightness sub-display area, thus achieving a low-brightness display.

[0091] In an exemplary embodiment, the greater the current of the driving signal, the stronger the magnetic field, and the greater the elongation of the deformation element 353.

[0092] Please see Figure 6 , Figure 6 This is a schematic diagram of a first distribution of the display area of ​​the display panel disclosed in the second embodiment of this application. In this embodiment, the display panel 10 includes a display area 11 and a non-display area 12. The non-display area 12 surrounds the periphery of the display area 11. The display area 11 is used to perform image display, and the non-display area 12 is used to set other auxiliary display components or functional units and signal lines.

[0093] In one embodiment, the display area 11 includes a plurality of sub-display areas 11a, which are arranged in an array, i.e., distributed in multiple rows and columns. The position of each sub-display area 11a corresponds to the position of a plurality of cutout portions 351a, i.e., a plurality of cutout portions 351a are disposed directly below each sub-display area 11a. The drive control unit can output the drive signal to a plurality of drive components 356 corresponding to at least one of the plurality of sub-display areas 11a, i.e., the drive control unit can control the brightness of the light provided by the backlight module 30 to each sub-display area 11a, thereby realizing regional control of the brightness of the backlight provided by the backlight module 30.

[0094] Please see Figure 7 , Figure 7 This is a schematic diagram illustrating a second distribution of the display area of ​​the display panel disclosed in the second embodiment of this application. In another embodiment, multiple display areas 11a may be sequentially arranged along a first direction 001 and all extend along a second direction 002, wherein the first direction 001 is perpendicular to the second direction 002, and the first direction 001 may be the direction in which the light guide plate 33 is away from the light-emitting element 32. In other embodiments, multiple display areas 11a may be sequentially arranged along the second direction 002 and all extend along the first direction 001; this application does not impose specific limitations on this.

[0095] In summary, the backlight module 30 provided in this application embodiment includes a light-emitting element 32 and a light guide plate 33, wherein the light-emitting element 32 is disposed on one side of the light guide plate 33. The light guide plate 33 is used to convert the horizontal incident light emitted by the light-emitting element 32 into vertical outgoing light. The backlight module 30 also includes a reflective component 34 and a brightness adjustment component 35. The reflective component 34 is disposed on the bottom side of the light guide plate 33, and the reflective component 34 and the light guide plate 33 are spaced apart. The brightness adjustment component 35 is disposed on the side of the reflective component 34 facing away from the light guide plate 33. The brightness adjustment component 35 is used to abut against a portion of the reflective component 34 to form at least one protrusion 34a on the reflective component 34 and to control the position and number of the protrusion 34a. The protrusion 34a is used to scatter the light incident on the bottom side of the light guide plate 33 into the light guide plate 33. Therefore, by forming protrusions 34a on the bottom side of the light guide plate 33 to scatter the light incident on the bottom side of the light guide plate 33 into the light guide plate 33, the total internal reflection condition within the light guide plate 33 can be disrupted. Consequently, the light within the portion of the light guide plate 33 corresponding to the protrusions 34a is emitted from the side of the light guide plate 33 facing the display panel 10, increasing the brightness of the portion of the backlight module 30 corresponding to the protrusions 34a. Furthermore, the brightness adjustment component 35 can control the position and number of the protrusions 34a, thereby enabling zoned control of the brightness of the backlight module 30's light-emitting side, thus achieving a high-contrast display device 100. Simultaneously, the technical solution of this application does not require a large number of LEDs, resulting in lower implementation cost and power consumption. Therefore, the technical solution of this application achieves a high-contrast and low-cost display device 100.

[0096] Please see Figure 8 , Figure 8 This is a schematic diagram of the layer structure of the backlight module disclosed in the third embodiment of this application. The difference between the second layer structure backlight module 30a and the first layer structure backlight module 30 is that the hollow portion 351a includes a plurality of first receiving holes a1 and a second receiving hole a2. For a description of the similarities between the second layer structure backlight module 30a and the first layer structure backlight module 30, please refer to the relevant description of the first layer structure backlight module 30, which will not be repeated here.

[0097] Please see Figure 9 , Figure 9 for Figure 8The diagram shows an enlarged view of structure VIIII in the backlight module. In this embodiment, the cutout portion 351a includes a plurality of first receiving holes a1 and a second receiving hole a2. The plurality of first receiving holes a1 are formed on the side of the substrate 351 facing the reflective component 34, and the plurality of first receiving holes a1 are spaced apart. The second receiving hole a2 is formed on the side of the substrate 351 away from the reflective component 34. The plurality of first receiving holes a1 are all connected to the second receiving hole a2, and the diameter of the second receiving hole a2 is larger than the diameter of the first receiving hole a1. When the driving member 356 does not form the magnetic field, that is, when the deformation element 353 is not deformed, each first receiving hole a1 is provided with a supporting member 352, and each supporting member 352 extends toward the second receiving hole a2, that is, part of the supporting member 352 is provided in the first receiving hole a1, and part of the supporting member 352 is provided in the second receiving hole a2. The deformation element 353, the limiting member 354, the driving member 356, and the heat-conducting member 357 are disposed within the second receiving hole a2, and the heat-conducting member 357 is connected to the inner wall of the second receiving hole a2. When the driving member 356 generates the magnetic field, the deformation element 353 extends toward the first receiving hole a1, causing a plurality of abutting members 352 to extend out of the first receiving hole a1. The abutting members 352 abut against the reflective assembly 34 to form the protrusion 34a on the reflective assembly 34.

[0098] It is understood that when the driving element 356 generates the magnetic field, it can form multiple protrusions 34a on the reflective component 34, thereby achieving regional control of the brightness of the backlight provided by the backlight module 30. Moreover, only one deformation element 353 and one driving element 356 are needed to push multiple supporting elements 352, reducing the number of components within the hollow portion 351a and saving costs.

[0099] In an exemplary embodiment, the orthographic projection of the plurality of first receiving holes a1 on the first back plate 311 lies within the orthographic projection of the second receiving hole a2 on the first back plate 311. The number of first receiving holes a1 in each of the hollow portions 351a can be determined according to actual needs, and this application does not impose specific limitations on this.

[0100] Please see Figure 10 , Figure 10 for Figure 8 The diagram shows a first top view of the substrate. In an exemplary embodiment, the plurality of second accommodating holes a2 can be arranged in a matrix, that is, the plurality of second accommodating holes a2 are arranged in multiple rows and columns, and the arrangement density of the plurality of second accommodating holes a2 gradually increases in the direction away from the light-emitting element 32 on the light guide plate 33.

[0101] Please see Figure 11 , Figure 11 for Figure 8 The diagram shows a second top view of the substrate. In an exemplary embodiment, a plurality of second receiving holes a2 are sequentially arranged along the first direction 001, and the length direction of the second receiving holes a2 extends along the second direction 002, wherein the first direction 001 may be perpendicular to the second direction 002. In other embodiments, a plurality of second receiving holes a2 are sequentially arranged along the second direction 002, and the length direction of the first receiving hole a1 extends along the first direction 001; this application does not impose specific limitations on this.

[0102] In other embodiments of this application, the hollow portion 351a is provided with a plurality of deformation elements 353, a plurality of limiting members 354, and a plurality of driving members 356. However, considering that providing a plurality of driving members 356 in a single hollow portion 351a may cause mutual interference between the magnetic fields formed by the plurality of driving members 356, and also makes the structure of the brightness adjustment component 35 more complex and increases the cost, therefore, after solving the problem of mutual interference between the magnetic fields formed by the plurality of driving members 356, a plurality of deformation elements 353, a plurality of limiting members 354, and a plurality of driving members 356 can be provided in the hollow portion 351a.

[0103] In summary, the backlight module 30 provided in this application embodiment includes a light-emitting element 32 and a light guide plate 33, wherein the light-emitting element 32 is disposed on one side of the light guide plate 33. The light guide plate 33 is used to convert the horizontal incident light emitted by the light-emitting element 32 into vertical outgoing light. The backlight module 30 also includes a reflective component 34 and a brightness adjustment component 35. The reflective component 34 is disposed on the bottom side of the light guide plate 33, and the reflective component 34 and the light guide plate 33 are spaced apart. The brightness adjustment component 35 is disposed on the side of the reflective component 34 facing away from the light guide plate 33. The brightness adjustment component 35 is used to abut against a portion of the reflective component 34 to form at least one protrusion 34a on the reflective component 34 and to control the position and number of the protrusion 34a. The protrusion 34a is used to scatter the light incident on the bottom side of the light guide plate 33 into the light guide plate 33. Therefore, by forming protrusions 34a on the bottom side of the light guide plate 33 to scatter the light incident on the bottom side of the light guide plate 33 into the light guide plate 33, the total internal reflection condition within the light guide plate 33 can be disrupted. Consequently, the light from the portion of the light guide plate 33 corresponding to the protrusions 34a is emitted from the side of the light guide plate 33 facing the display panel 10, increasing the brightness of the portion of the backlight module 30 corresponding to the protrusions 34a. Furthermore, the brightness adjustment component 35 can control the position and number of the protrusions 34a, thereby enabling zoned control of the brightness of the backlight module 30's light-emitting side, thus achieving a high-contrast display device 100. Simultaneously, the technical solution of this application does not require a large number of LEDs, resulting in lower implementation cost and power consumption. Therefore, the technical solution of this application achieves a high-contrast and low-cost display device 100.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this application. 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.

[0105] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments, and making equivalent changes according to the claims of this application, still falls within the scope of this application.

Claims

1. A backlight module, comprising a light-emitting element and a light guide plate, wherein the light-emitting element is disposed on one side of the light guide plate, characterized in that, The backlight module further includes a reflective component and a brightness adjustment component. The reflective component is disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The brightness adjustment component is disposed on the side of the reflective component facing away from the light guide plate. The brightness adjustment component is used to abut against a portion of the reflective component corresponding to its position to form at least one protrusion on the reflective component facing the light guide plate, and to control the position and number of the protrusions. The protrusions are used to scatter light incident on the bottom side of the light guide plate into the light guide plate. The brightness adjustment component includes a substrate, multiple abutting members, multiple deformation elements, and multiple limiting members. The substrate is disposed... On the side of the reflective assembly facing away from the light guide plate, a plurality of cutouts penetrating the substrate are formed on the substrate. Each cutout contains at least one abutment, one deformation element, and one limiting member. The abutment is located at the opening of the cutout facing the reflective assembly. The deformation element is located at one end of the abutment facing away from the reflective assembly. The limiting member is located on the periphery of the deformation element and at the other end of the deformation element facing away from the abutment. The deformation element is used to extend so that at least one abutment extends out of the cutout to abut against part of the reflective assembly. The limiting member is used to restrict the extension direction of the deformation element.

2. The backlight module as described in claim 1, characterized in that, The density of the plurality of hollowed-out portions gradually increases in the direction away from the light-emitting element on the light guide plate.

3. The backlight module as described in claim 1, characterized in that, The material of the deformation element includes rare-earth super magnetostrictive material; The brightness adjustment component also includes multiple driving components, each of the hollowed-out portions is provided with a driving component, and the driving component surrounds the periphery of the limiting component. The driving component is used to form a magnetic field, and the magnetic field is used to drive the deformation element to extend.

4. The backlight module as described in claim 3, characterized in that, The brightness adjustment component also includes multiple heat-conducting components, and each of the hollowed-out portions is provided with a heat-conducting component. The heat-conducting component surrounds the periphery of the driving component and is connected to a portion of the inner wall of the hollowed-out portion.

5. The backlight module as described in claim 1, characterized in that, The backlight module further includes a back plate, which includes a first back plate disposed on the side of the substrate opposite to the reflective component. The first back plate has a plurality of mounting holes that penetrate the first back plate. The positions of the plurality of mounting holes correspond one-to-one with the positions of the plurality of cutouts, and the mounting holes are connected to the corresponding cutouts. The backlight module also includes multiple height adjustment components, each of the mounting holes is provided with a height adjustment component, the height adjustment component is located at the end of the limiting member opposite to the abutment member, and the height adjustment component is used to adjust the height of the abutment member.

6. The backlight module as described in claim 5, characterized in that, Each of the height adjustment components includes a support member and a rotating member, both of which are located within the mounting hole. The support member is disposed at the end of the limiting member opposite to the abutment member, and the rotating member is disposed at the end of the support member opposite to the limiting member. The support member is threadedly connected to the mounting hole. The rotating member is used to rotate and drive the support member to rotate, thereby adjusting the height of the abutment member.

7. The backlight module as described in any one of claims 1-6, characterized in that, The reflective component includes a reflective layer disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The brightness adjustment component abuts against a portion of the reflective layer corresponding to the position of the brightness adjustment component to form at least one first protrusion on the reflective layer protruding towards the light guide plate. The first protrusion is used to reflect the light rays incident on the bottom side of the light guide plate into the light guide plate.

8. The backlight module as described in any one of claims 1-6, characterized in that, The reflective component includes a reflective layer and a refractive layer. The refractive layer is disposed on the bottom side of the light guide plate and spaced apart from the light guide plate. The reflective layer is disposed on the side of the refractive layer opposite to the light guide plate. The brightness adjustment component abuts against a portion of the reflective layer to form at least one first protrusion protruding towards the light guide plate on the reflective layer. The first protrusion abuts against the refractive layer to form a second protrusion protruding towards the light guide plate on the refractive layer. The second protrusion is used to refract the light rays incident on the bottom side of the light guide plate to the first protrusion. The first protrusion is used to reflect the light rays refracted to the first protrusion to the second protrusion. The second protrusion is also used to refract the light rays reflected from the first protrusion to the second protrusion into the light guide plate.

9. A display device, characterized in that, It includes a display panel and a backlight module as described in any one of claims 1-8, wherein the display panel is disposed on the light-emitting side of the backlight module.

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