Backlight module and display device

Abstract

The invention discloses a backlight module and a display device, and relates to the technical field of display equipment, the backlight module comprises a back plate, a light guide assembly and a light emitting part; the light guide assembly is installed on the back plate and comprises a light guide plate and a reflector, one side face of the light guide plate is a light-in face, the surface, away from the back plate, of the light guide plate is a light-out face, and the reflector is located on the side, provided with the light-in face, of the light guide plate; the light-emitting part is installed on the back plate and located on the side, away from the light-emitting face, of the light guide assembly. Light emitted by the light-emitting part is reflected by the reflecting part, then enters the light guide plate from the light-in surface, is diffused by the light guide plate and then is emitted out from the light-out surface. According to the backlight module, the light-emitting part is arranged on the side, away from the light-emitting face, of the light guide assembly, the light emitted by the light-emitting part is reflected by the reflecting part and then enters from the side face of the light guide plate, then the problem that the width of a black edge of an existing backlight module is large is solved, and the visual experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display equipment, and in particular to a backlight module and a display device. Background Art

[0002] LCD backlight modules are categorized into edge-lit and direct-lit types based on the light input method. Direct-lit backlight modules have their backlight source located below the LCD panel, directly illuminating it. Edge-lit backlight modules, on the other hand, have their backlight source located to the side of the LCD panel, directing light across the entire panel via a light guide plate.

[0003] Because the light source of an edge-lit backlight module is located on one side of the light guide plate, the distance between the light guide plate and the back plate is smaller than that of a direct-lit backlight module, making the edge-lit backlight module thinner than a direct-lit backlight module. Therefore, edge-lit backlight modules are more widely used in thin and light electronic products such as mobile phones and tablets.

[0004] Although edge-lit backlight modules are relatively thin, their LEDs are attached to a heat-dissipating aluminum substrate via thermally conductive adhesive and are located on one side of the light guide plate. Consequently, these components, including the LEDs, heat-dissipating aluminum substrate, and thermally conductive adhesive, increase the black border width of the LCD module (the distance between the display area and the display's outer contour), impacting the user's visual experience. Summary of the Invention

[0005] The main purpose of the present invention is to provide a backlight module and a display device, aiming to solve the problem of large black border width in the existing backlight module.

[0006] To achieve the above-mentioned object, the present invention provides a backlight module, which includes a backplane, a light guide assembly, and a light-emitting element; the light guide assembly is mounted on the backplane, and includes a light guide plate and a reflector; one side of the light guide plate is a light incident surface, and the surface of the light guide plate facing away from the backplane is a light emitting surface; the reflector is located on the side of the light guide plate provided with the light incident surface; the light-emitting element is mounted on the backplane and located on the side of the light guide assembly facing away from the light emitting surface;

[0007] The light emitted by the light emitting element is reflected by the reflective element and enters the light guide plate from the light incident surface, and then diffused by the light guide plate and emitted from the light emitting surface.

[0008] In one embodiment of the present invention, the reflective element includes a first reflective sheet, and the first reflective sheet is tilted toward the light incident surface in a direction away from the back plate.

[0009] In one embodiment of the present invention, the light emitting element emits light toward the first reflective sheet, and the light emitting element is located between the first reflective sheet and the back plate.

[0010] In one embodiment of the present invention, the reflector also includes two second reflective sheets, one second reflective sheet is connected to one end of the first reflective sheet facing the back panel, and the other second reflective sheet is connected to the side of the light guide plate away from the light emitting surface, the first reflective sheet and the two second reflective sheets are combined to form a light guide channel with an opening, and the light-emitting element is located at the opening of the light guide channel.

[0011] In one embodiment of the present invention, the reflective component also includes a third reflective sheet, which is located on the side of the light guide plate away from the light emitting surface. The third reflective sheet is inclined toward the light incident surface in a direction close to the back plate, and the light emitting direction of the light-emitting component is toward the third reflective sheet.

[0012] In one embodiment of the present invention, the reflector also includes a second reflector sheet, the first reflector sheet, the second reflector sheet and the third reflector sheet are connected in sequence and enclosed to form a light guide groove with an opening facing the light incident surface, and the light-emitting component is located at the opening of the light guide groove.

[0013] In one embodiment of the present invention, the backlight module also includes a heat sink, which is installed on the back plate. The light-emitting component is arranged on the surface of the heat sink facing away from the back plate. The heat sink is provided with a limiting groove. The end of the third reflector facing away from the second reflector is bent toward the light-emitting component and abuts against the side wall of the limiting groove.

[0014] In one embodiment of the present invention, the reflective member includes a fourth reflective sheet, which is provided on a side of the light guide plate away from the light emitting surface and is used to reflect light incident on the light guide plate toward the light emitting surface;

[0015] And / or, the light-emitting element includes an LED lamp and a focusing lens, and the focusing lens is arranged on the light-emitting side of the LED lamp.

[0016] In one embodiment of the present invention, the back panel includes a first section, a second section and a third section connected in sequence, the first section and the third section are spaced apart in a direction perpendicular to the light emitting surface, the light guide plate is attached to the third section, and the light-emitting component is attached to the first section.

[0017] In one embodiment of the present invention, the display device includes a display panel and any one of the above-mentioned backlight modules; the display panel is located on a side of the light guide plate where the light emitting surface is provided.

[0018] The backlight module proposed in the present invention includes a back panel, a light guide assembly and a light emitting element, and the light emitting element and the light guide assembly are both mounted on the back panel. The light guide assembly includes a light guide plate and a reflector, one side surface of the light guide plate is a light incident surface, and the surface of the light guide plate facing away from the back panel is a light emitting surface. The reflector is located on the side of the light incident surface of the light guide plate. The reflector reflects the light emitted by the light emitting element so that the light enters the light guide plate from the light incident surface. After the light propagates and diffuses on the light guide plate, it is emitted from the light emitting surface of the light guide plate to the display panel to realize the display function. Since the light emitting element of the present application is located on the side of the light guide assembly facing away from the light emitting surface, compared with the existing side-entry backlight module, the width of the black edge generated by the light emitting element can be reduced, thereby improving the user's visual experience. In addition, the light emitted by the light emitting element is reflected to the light incident surface on one side of the light guide plate by the reflector, and compared with the existing direct-type backlight module, the distance between the light emitting element and the light guide plate can be reduced, thereby reducing the overall thickness of the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the internal structure of an embodiment of a backlight module provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the light path propagation of the backlight module;

[0022] Figure 3 for Figure 1 Schematic diagram of the light path propagation of the backlight module;

[0023] Figure 4 A schematic diagram of the internal structure of another embodiment of the backlight module provided by the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the light path propagation of the backlight module;

[0025] Figure 6 for Figure 4 Schematic diagram of the light path propagation of the backlight module;

[0026] Figure 7 A schematic diagram of the internal structure of another embodiment of the backlight module provided by the present invention;

[0027] Figure 8 for Figure 7 Schematic diagram of the light path propagation of the backlight module;

[0028] Figure 9 for Figure 7 Schematic diagram of the structure of the light-emitting component in the backlight module.

[0029] Description of Figure Numbers:

[0030] 10. Back panel; 11. First section; 12. Second section; 13. Third section; 14. Fourth section; 15. Mounting slot; 20. Light-emitting component; 21. LED lamp; 211. Light output channel; 22. Convex lens; 30. Light guide assembly; 31. Light guide plate; 311. Light output surface; 312. Light input surface; 32. Reflector; 321. First reflector; 322. Second reflector; 323. Third reflector; 324. Fourth reflector; 325. Light guide channel; 326. Light guide groove; 40. Display panel; 50. Optical film; 60. Heat sink; 61. Limiting groove.

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present invention provides a backlight module.

[0036] Combine Figures 1 to 7 As shown, in one embodiment of the present invention, the backlight module includes a back panel 10, a light guide assembly 30, and a light emitting element 20; the light guide assembly 30 is mounted on the back panel 10, and includes a light guide plate 31 and a reflector 32. One side of the light guide plate 31 is a light incident surface 312, and the surface of the light guide plate 31 facing away from the back panel 10 is a light emitting surface 311. The reflector 32 is located on the side of the light guide plate 31 provided with the light incident surface 312; the light emitting element 20 is mounted on the back panel 10 and is located on the side of the light guide assembly 30 facing away from the light emitting surface 311;

[0037] The light emitted by the light emitting element 20 is reflected by the reflective element 32 and enters the light guide plate 31 from the light incident surface 312 , and then diffused by the light guide plate 31 and emitted from the light emitting surface 311 .

[0038] In this embodiment, the back panel 10 in the backlight module is used to support and fix components such as the light-emitting element 20 and the light guide assembly 30. These components can be connected to the back panel 10 by gluing or by pressing them against the surface of the back panel 10. The light-emitting element 20 can be an LED (light-emitting diode), a CCFL (cold cathode fluorescent lamp), an OLED (organic light-emitting diode), or a laser light source.

[0039] The light guide plate 31 can be made of PMMA (polymethyl methacrylate), PC (polycarbonate), or MS board (a copolymer composed primarily of methyl methacrylate and styrene). It evenly distributes light reflected from the reflector 32 across the entire display area, ensuring uniform brightness. Specifically, the light guide plate 31 is designed with specialized microstructures, such as microprisms or lattice dots, that alter the light's propagation path. Light entering the light guide plate 31 through its light-entry surface 312 undergoes multiple reflections and refractions within the plate, thereby enhancing the brightness uniformity of its light-exit surface 311.

[0040] The reflective member 32 can be a reflective mirror, reflective paper or a component coated with a reflective material. Although the present application arranges the light-emitting member 20 below the light guide component 30 (that is, the side of the light guide component 30 facing the back panel 10), the light emitted by the light-emitting member 20 does not directly irradiate the surface of the light guide plate 31, but is reflected by the reflective member 32 and enters the light guide plate 31 from one side of the light guide plate 31.

[0041] The light-emitting components of the existing direct-type backlight module directly illuminate the diffuser plate. In order to improve the uniformity of the brightness of the diffuser plate, it is necessary to maintain a certain distance between the light-emitting component and the diffuser plate to ensure that the light emitted by the light-emitting component can be fully diffused to the surroundings, avoiding the problem of excessive brightness or uneven brightness of the diffuser plate. Compared with the direct-type backlight module, the design of the present application can use the reflector 32 to increase the optical path, thereby reducing the distance between the light-emitting component 20 and the light guide plate 31 in the vertical direction (that is, perpendicular to the direction of the light-emitting surface 311), thereby reducing the thickness of the backlight module to ensure that the side-entry backlight module has the advantage of a thinner thickness. At the same time, since the light-emitting component 20 of the present application is located below the light guide component 30, the width of the display area occupied by the light-emitting component 20, the heat dissipation plate 60 and the thermal conductive adhesive is reduced, that is, the width of the black edge of the module is reduced compared with the existing side-entry backlight module.

[0042] Combine Figures 1 to 3 As shown, in one embodiment of the present invention, the reflective member 32 includes a first reflective sheet 321 , and the first reflective sheet 321 is tilted toward the light incident surface 312 in a direction away from the back plate 10 .

[0043] In this embodiment, the first reflective sheet 321 is tilted to facilitate reflection of light from the light-emitting element 20 onto the light-entering surface 312 of the light guide plate 31. The tilt angle of the first reflective sheet 321 is designed based on the light emission direction of the light-emitting element 20, allowing the first reflective sheet 321 to receive the light from the light-emitting element 20 and reflect it onto the light-entering surface 312 of the light guide plate 31. For example, the tilt angle of the first reflective sheet 321 relative to the light-entering surface 312 can be 30 degrees, 45 degrees, 60 degrees, or the like. The tilted first reflective sheet 321 helps reduce light loss during reflection, allowing more light to enter the light guide plate 31 and be evenly distributed, thereby improving the brightness of the backlight module. In other embodiments, the first reflective sheet 321 can be designed to be parallel to the light-entering surface 312 and vertically positioned between the light guide plate 31 and the light-emitting element 20. In this case, light from the light-emitting element 20 can also be reflected off the first reflective sheet 321 and enter the light-entering surface 312.

[0044] The surface of the first reflective sheet 321 is coated with a material with high reflectivity, such as silver or aluminum, to improve the reflectivity of light. The reflective surface of the first reflective sheet 321 can be flat or concave, such as Figure 2 and Figure 3 As shown, the reflective surface of the first reflective sheet 321 is designed to be flat, which can improve the uniformity of light entering the light incident surface 312; in addition, in other embodiments, the reflective surface of the first reflective sheet 321 can also be designed to be concave, so that the first reflective sheet 321 can also play a role in gathering light, so as to reduce the energy loss during light propagation and improve the propagation efficiency of light from the first reflective sheet 321 to the light guide plate 31.

[0045] Combine Figures 1 to 3 As shown, in one embodiment of the present invention, the light emitting direction of the light emitting element 20 is toward the first reflective sheet 321 , and the light emitting element 20 is located between the first reflective sheet 321 and the back plate 10 .

[0046] In this embodiment, the light emitting element 20 is located along the first reflective sheet 321. Figure 2 In the vertical direction, the light emitting element 20 is within the projection area (orthogonal projection area) on the back plate 10, or is partially within the projection area, that is, the light emitting element 20 is located below the first reflective sheet 321, thereby reducing the distance between the light emitting element 20 and the first reflective sheet 321, thereby reducing the energy loss of light when propagating between the light emitting element 20 and the first reflective sheet 321. In other embodiments, the light emitting element 20 can also be arranged within the orthogonal projection area of ​​the light guide on the back plate 10, and the light emitting element 20 can be tilted toward the first reflective sheet 321 so that the light output direction of the light emitting element 20 is toward the first reflective sheet 321.

[0047] Combine Figures 1 to 3As shown, in one embodiment of the present invention, the reflector 32 also includes two second reflective sheets 322, one second reflective sheet 322 is connected to one end of the first reflective sheet 321 toward the back panel 10, and the other second reflective sheet 322 is connected to the side of the light guide plate 31 away from the light emitting surface 311, the first reflective sheet 321 and the two second reflective sheets 322 are enclosed to form a light guide channel 325 with an opening, and the light-emitting component 20 is located at the opening set in the light guide channel 325.

[0048] In this embodiment, a light-guiding channel 325 is formed between the first reflective sheet 321 and the two second reflective sheets 322. This channel converges the light emitted by the light-emitting element 20, improving the efficiency of light transmission from the light-emitting element 20 to the light guide plate 31. This increases the brightness of the display area of ​​the display panel 40 and reduces the power consumption of the backlight module. Furthermore, the inner wall of the light-guiding channel 325 is coated with a reflective-enhancing film, such as an aluminum layer or a silver layer, to increase the reflectivity of the reflective element 32.

[0049] The two second reflective sheets 322 are along Figure 1 It is arranged in a vertical direction, wherein the second reflective sheet 322 connected to the light guide plate 31 is flush with the light incident surface 312 or slightly protrudes from the light incident surface 312, so that the second reflective sheet 322 can block the light directly entering the light guide plate 31. The light needs to first enter the light guide channel 325 and be reflected by the second reflective sheet 322 and / or the first reflective sheet 321 before being emitted to the light incident surface 312, thereby improving the uniformity of the light emission of the light guide plate 31.

[0050] Combine Figures 4 to 6 As shown, in one embodiment of the present invention, the reflector 32 also includes a third reflector 323, which is located on the side of the light guide plate 31 away from the light emitting surface 311, and the third reflector 323 is inclined toward the light incident surface 312 in the direction close to the back plate 10, and the light emitting direction of the light-emitting component 20 is toward the third reflector 323.

[0051] In this embodiment, the light-emitting element 20 is located within the orthographic projection area of ​​the light guide plate 31 on the back panel 10. Since the third reflective sheet 323 is arranged at an angle and the light-emitting element 20 emits light toward the third reflective sheet 323, the light emitted by the light-emitting element 20 is first reflected by the third reflective sheet 323 before entering the light incident surface 312 of the light guide plate 31. Since the light-emitting element 20 is located within the orthographic projection area of ​​the light guide plate 31 on the back panel, the heat sink 60 used to support and dissipate heat for the light-emitting element 20 is also at least partially located within the orthographic projection area of ​​the light guide plate 31 on the back panel. Therefore, in this design, the light-emitting element 20 does not cause black borders to appear on the display panel 40, and the influence of the heat sink 60 disposed below the light-emitting element 20 on the width of the black borders is also reduced.

[0052] In one embodiment, only the third reflector 323 is provided, and the light is reflected once by the third reflector 323 and then enters the light surface 312. In another embodiment, both the first reflector 321 and the third reflector 323 are provided, and the light is reflected sequentially by the third reflector 323 and the first reflector 321 and then enters the light surface 312.

[0053] Combine Figures 4 to 6 As shown, in one embodiment of the present invention, the reflector 32 also includes a second reflector 322, the first reflector 321, the second reflector 322 and the third reflector 323 are connected in sequence and enclosed to form a light guide groove 326 with an opening facing the light incident surface 312, and the light-emitting component 20 is located at the opening of the light guide groove 326.

[0054] In this embodiment, by providing a first reflective sheet 321, a second reflective sheet 322 and a third reflective sheet 323, they are enclosed together to form a light guide groove 326, so that the light emitted by the light emitting element 20 can be more effectively reflected into the light guide plate 31, reducing the loss of light during the propagation and reflection process, and improving the light efficiency and brightness of the backlight module. Figure 5 and Figure 6 As shown, the light-emitting side of the light-emitting element 20 faces the opening of the light guide groove 326, so the first reflector 321, the second reflector 322, and the third reflector 323 shield and reflect the light, thereby preventing the light from propagating to the side of the reflector 32 facing away from the light guide plate 31. Through these designs, the backlight module can achieve high brightness and high uniformity while maintaining a relatively thin thickness.

[0055] Combine Figures 4 to 6 As shown, in one embodiment of the present invention, the backlight module also includes a heat sink 60, which is installed on the back plate 10, and the light-emitting component 20 is arranged on the surface of the heat sink 60 facing away from the back plate 10. The heat sink 60 is provided with a limiting groove 61, and the end of the third reflective sheet 323 facing away from the second reflective sheet 322 is bent toward the light-emitting component 20 and abuts against the side wall of the limiting groove 61.

[0056] In this embodiment, the heat sink 60 can be made of a highly thermally conductive material, such as aluminum or copper, to ensure rapid heat conduction, thereby extending the service life of the light-emitting element 20. The shape and size of the heat sink 60 can be optimized based on the heat distribution of the light-emitting element 20 to achieve optimal heat dissipation. The surface of the heat sink 60 can be specially treated, such as with fins or textures, to increase the heat dissipation area and improve heat dissipation efficiency. Furthermore, the light-emitting element 20 and the heat sink 60 can be mounted using adhesive bonding or mechanical fastening to ensure precise alignment and securement of the heat sink 60 with the light-emitting element 20.

[0057] At the same time Figure 4As shown, a limiting groove 61 is provided on the heat dissipation plate 60, and the bent portion of the third reflector 323 is fitted with the bottom wall of the limiting groove 61 and abuts against the side wall of the limiting groove 61. The limiting groove 61 serves to limit the third reflector 323, thereby improving the stability of the third reflector 323 and facilitating assembly and positioning.

[0058] Further, such as Figures 7 to 9 As shown, a light outlet channel 211 is provided on the light outlet side of the LED lamp 21, and the light outlet area of ​​the LED lamp 21 corresponds to the size of the light outlet channel 211, so that the light emitted by the LED lamp 21 is emitted from the light outlet channel 211. The light outlet channel 211 has a smaller cross-sectional size, so the light emitted by the LED lamp 21 has a smaller size, which makes it easier to control the light propagation path so as to guide the light to the light guide plate 31. The shape of the light outlet channel 211 can be designed to be rectangular or circular, and the inner wall of the light outlet channel 211 is coated, such as adding a reflective film, to improve the reflection efficiency of the light. The size of the light outlet channel 211 can be designed according to the light-emitting area of ​​the LED lamp 21 and the light input requirements of the light guide plate 31, and no further limitation is made here.

[0059] Going further, Figure 9 As shown, at least two light exit channels 211, focusing lenses, and LED lamps 21 are each provided. Each focusing lens is located at the exit of a light exit channel 211, and the light exit area of ​​each LED lamp 21 corresponds to a light exit channel 211. This design helps achieve uniform light distribution and high brightness output. The focusing lens further focuses the light and can be a semi-convex lens 22, an elliptical lens, or a spherical lens. Each focusing lens is sandwiched between the optical film 50 to form a strip-shaped optical film layer, which facilitates the fitting of the focusing lens and the LED lamp 21.

[0060] Combine Figures 1 to 8 As shown, in one embodiment of the present invention, the reflective member 32 includes a fourth reflective sheet 324, which is disposed on a side of the light guide plate 31 away from the light emitting surface 311 and is used to reflect the light incident on the light guide plate 31 toward the light emitting surface 311;

[0061] And / or, the light emitting element 20 includes an LED lamp 21 and a focusing lens, and the focusing lens is arranged on the light emitting side of the LED lamp 21.

[0062] In this embodiment, since the light guide plate 31 contains a large number of microprisms or lattice structures, which refract and reflect light, light entering the light guide plate 31 from the light incident surface 312 is continuously refracted and reflected during its propagation, either exiting the light exit surface 311 or continuing to propagate within the light guide plate 31. Therefore, the fourth reflective sheet 324, disposed on the side of the light guide plate 31 facing away from the light exit surface 311, can reflect light propagating within the light guide plate 31 away from the light exit surface 311, thereby preventing the light from exiting from the side of the light guide plate 31 facing the back panel 10, thereby improving the brightness of the backlight module and the brightness uniformity of the light guide plate 31.

[0063] In the case where the reflector 32 is limited or not to include the fourth reflector 324, the light-emitting element 20 can use a high-brightness LED lamp as the light source to ensure sufficient brightness and color saturation. The installation position and light emission direction of the LED lamp 21 are designed based on the position and angle of each reflector in the reflector 32. Please refer to the description of the above embodiment and will not be further elaborated here.

[0064] The focusing lens is a convex lens 22 or other lens capable of focusing light. The focusing lens further concentrates the light emitted by the LED lamp 21, thereby controlling and guiding the light emitted by the light-emitting element to enter the reflective element and propagate along a predetermined reflection path. This allows the light to more efficiently enter the light guide plate 31, thereby increasing the brightness of the backlight module and making the light distribution more uniform, thereby improving display quality.

[0065] Combine Figures 1 to 8 As shown, in one embodiment of the present invention, the back panel 10 includes a first section 11, a second section 12 and a third section 13 connected in sequence, the first section 11 and the third section 13 are spaced apart in a direction perpendicular to the light emitting surface 311, the light guide plate 31 is attached to the third section 13, and the light-emitting component 20 is attached to the first section 11.

[0066] In this embodiment, the first, second, and third sections 11, 12, and 13 are connected to form a stepped backplate 10. This structural design creates a clearance on the side of the third section 13 facing away from the light guide plate 31, facilitating the installation of a backlight module or other components of the display device, thereby enhancing the structural integration. The spacing between the first and third sections 11, 13 is set based on the overall thickness of the light-emitting element 20 and heat sink 60. This ensures that light can be effectively transmitted and evenly distributed on the light guide plate 31 while reducing the overall thickness of the backlight module.

[0067] The first section 11, the second section 12, and the third section 13 are made of different materials and structures to meet different mechanical and heat dissipation requirements. For example, the first section 11 can be made of a metal material with good thermal conductivity to improve the heat dissipation efficiency of the light-emitting element 20; the second section 12 can be made of a plastic material to facilitate the bending and forming of the back panel 10; and the third section 13 can be made of a high-strength material to support the structure of the entire light guide plate 31. Of course, the first section 11, the second section 12, and the third section 13 can also be made of the same material. In addition, thermal conductive glue or a heat dissipation pad can be filled between the first section 11 and the heat dissipation plate 60 to further improve heat dissipation efficiency.

[0068] Furthermore, the back panel 10 also includes a fourth section 14, which extends in the vertical direction. One end of the fourth section 14 is connected to the end of the first section 11 that faces away from the second section 12, and the other end is used to support the display panel 40. The fourth section 14, the first section 11, and the second section 12 enclose a mounting groove 15, which limits, fixes, and protects the light-emitting element 20 and the reflective element 32. The backlight module also includes an outer frame. To improve the stability of the fourth section 14 in supporting the display panel 40, the end of the fourth section 14 that faces away from the first section 11 abuts against the outer frame, and the display panel 40 is supported by the outer frame.

[0069] In one embodiment, if Figures 1 to 8 As shown, the backlight module further includes an optical film 50 , which is disposed on a side of the light guide plate 31 away from the back plate 10 . The optical film 50 at least includes a diffusion sheet and a prism sheet stacked in sequence along a direction perpendicular to the light emitting surface 311 .

[0070] The provision of the optical film 50 further optimizes the distribution of light from the backlight module and improves display quality. The diffuser is made of a highly transparent material and its function is to further even out the light emitted by the light guide plate 31 to eliminate uneven brightness and potential light spots. It can effectively reduce the directness of the light, making the light softer, reducing visual fatigue, and improving the user experience. The prism is used to achieve the focusing and diffusion effect of light to improve brightness and contrast. Each optical film 50 is directly fixed by bonding to ensure its stability and reliability in long-term use.

[0071] The present invention also proposes a display device, which includes a display panel 40 and a backlight module. The specific structure of the backlight module refers to the above-mentioned embodiment. Since the display device adopts all the technical solutions of all the above-mentioned backlight module embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0072] The display panel 40 may be a liquid crystal display panel, an organic light-emitting diode display panel, or another type of display panel. The connection between the backlight module and the display panel 40 may be achieved using optical adhesive, light-guiding tape, or another connection method to ensure efficient light transmission and the smoothness of the display panel 40. Furthermore, light-guiding strips or reflective strips may be provided at the edges of the display panel 40 to further improve light utilization and display quality. These designs enable the display device to achieve not only an ultra-thin and high-brightness display effect, but also a wider viewing angle and higher color saturation.

[0073] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A backlight module, characterized in that: include: Back panel; A light guide assembly is mounted on the back panel, comprising a light guide plate and a reflector, wherein one side of the light guide plate is a light incident surface, and the surface of the light guide plate facing away from the back panel is a light emitting surface, and the reflector is located on the side of the light guide plate provided with the light incident surface; as well as a light-emitting element, the light-emitting element being mounted on the back plate and located on a side of the light-guiding assembly facing away from the light-emitting surface; The light emitted by the light emitting element is reflected by the reflective element and enters the light guide plate from the light incident surface, and then diffused by the light guide plate and emitted from the light emitting surface.

2. The backlight module according to claim 1, wherein: The reflector includes a first reflective sheet, which is tilted toward the light incident surface in a direction away from the back plate.

3. The backlight module according to claim 2, wherein: The light emitting element emits light in a direction toward the first reflective sheet, and the light emitting element is located between the first reflective sheet and the back plate.

4. The backlight module according to claim 3, wherein: The reflector also includes two second reflective sheets, one second reflective sheet is connected to one end of the first reflective sheet facing the back panel, and the other second reflective sheet is connected to the side of the light guide plate facing away from the light emitting surface. The first reflective sheet and the two second reflective sheets are combined to form a light guide channel with an opening, and the light-emitting component is located at the opening of the light guide channel.

5. The backlight module according to claim 2, wherein: The reflector also includes a third reflector, which is located on the side of the light guide plate away from the light emitting surface. The third reflector is tilted toward the light incident surface in the direction close to the back plate, and the light emitting direction of the light emitting component is toward the third reflector.

6. The backlight module according to claim 5, wherein: The reflector also includes a second reflector sheet. The first reflector sheet, the second reflector sheet and the third reflector sheet are connected in sequence and enclosed to form a light guide groove with an opening facing the light incident surface. The light-emitting element is located at the opening of the light guide groove.

7. The backlight module according to claim 6, wherein: The backlight module also includes a heat sink, which is installed on the back plate. The light-emitting component is arranged on the surface of the heat sink facing away from the back plate. The heat sink is provided with a limiting groove. The end of the third reflector facing away from the second reflector is bent toward the light-emitting component and abuts against the side wall of the limiting groove.

8. The backlight module according to any one of claims 1 to 7, wherein: The reflector comprises a fourth reflective sheet, which is provided on a side of the light guide plate away from the light emitting surface and is used to reflect light incident on the light guide plate toward the light emitting surface; And / or, the light-emitting element includes an LED lamp and a focusing lens, and the focusing lens is arranged on the light-emitting side of the LED lamp.

9. The backlight module according to any one of claims 1 to 7, wherein: The back panel includes a first section, a second section and a third section connected in sequence. The first section and the third section are spaced apart in a direction perpendicular to the light emitting surface. The light guide plate is attached to the third section, and the light emitting component is attached to the first section.

10. A display device, characterized in that: The display device includes a display panel and a backlight module according to any one of claims 1 to 9; the display panel is located on a side of the light guide plate where the light emitting surface is provided.

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