Backlight module and display device

Abstract

This application provides a backlight module and a display device. The backlight module includes a light source assembly and a light guide plate. The light guide plate includes a light incident surface and a light emitting surface, and the light source assembly is disposed on one side of the light incident surface. The light source assembly includes a light guide element and light-emitting elements; the light guide element is disposed on one side of the light incident surface; the light-emitting elements are disposed at opposite ends of the light guide element, such that the light guide element guides the light emitted by the light-emitting elements and directs the light to the side of the light guide element closer to the light incident surface before it enters the light guide plate. This backlight module can effectively reduce the number of light-emitting elements used and lower production costs.

Description

Technical Field

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

[0002] Liquid crystal display devices have a long history of development and the technology is very mature. Due to their many advantages such as low cost, long lifespan, and no radiation, they are widely used in flat panel display fields such as LCD TVs, mobile phones, computer screens, laptop screens, and tablets.

[0003] Currently, LCD panels require a backlight module to provide a backlight source when in use. Traditional backlight modules typically require a large number of light-emitting elements to be arranged on the lamp board, and the light emitted by the light-emitting elements is guided into the light guide plate to light up the backlight module so that the display panel can display images.

[0004] However, traditional backlight modules use a large number of light-emitting elements, which not only increases the cost, but also causes uneven brightness on the display panel if any of the light-emitting elements are damaged. Summary of the Invention

[0005] This application provides a backlight module and a display device, which aims to solve the problems of high cost caused by the large number of light-emitting elements in the backlight module and uneven brightness of the display panel caused by damage to the light-emitting elements in the prior art.

[0006] To address the aforementioned technical problems, the first technical solution provided in this application is: to provide a backlight module. The backlight module includes a light source assembly and a light guide plate, the light guide plate including a light incident surface and a light emitting surface, and the light source assembly being disposed on one side of the light incident surface.

[0007] The light source assembly includes:

[0008] A light guide is disposed on one side of the light incident surface;

[0009] Light-emitting elements are disposed at opposite ends of the light guide, so that the light guide guides the light emitted by the light-emitting elements and directs the light to the side of the light guide near the light-incident surface before it enters the light guide plate.

[0010] The light guide includes a light guide portion and multiple light emitting portions. The light guide portion is disposed on one side of the light incident surface, and the multiple light emitting portions are distributed on the surface of the light guide portion near the light guide plate. The light emitting elements are disposed at opposite ends of the light guide portion, so that the light guide portion guides the light emitted by the light emitting elements and leads the light to the light emitting portions and then into the light guide plate.

[0011] The light-emitting part is a lens that protrudes toward the light-incident surface, and the surface of the light-emitting part near the light-incident surface is an arc surface that protrudes toward the light-incident surface.

[0012] The light guide has an end face and an annular side face, and the light-emitting element is disposed on one side of the end face; the annular side face has a light-emitting area and a non-light-emitting area, and the non-light-emitting area is provided with a light-shielding layer so that the light entering the light guide is emitted from the light-emitting area and then enters the light guide plate.

[0013] The backlight module is a side-lit backlight module, the side of the light guide plate is the light incident surface, the light guide part is strip-shaped, and a plurality of light emitting parts are evenly distributed along the length direction of the light guide part on the surface of the light guide part near the light guide plate.

[0014] The light guide portion corresponds to two light-emitting elements, and the two light-emitting elements are respectively disposed at opposite ends of the light guide portion along its length.

[0015] The backlight module is a direct-lit backlight module, and the top and bottom surfaces of the light guide plate are the light-emitting surface and the light-incident surface, respectively. The light guide part is plate-shaped and is disposed opposite to the light guide plate. A plurality of light-emitting parts are evenly distributed on the surface of the light guide part near the light guide plate.

[0016] The light guide portion has multiple light-emitting elements arranged at opposite ends along a direction parallel to the light guide portion, and the multiple light-emitting elements are arranged along the length direction of the side of the light guide portion.

[0017] The light guide plate has a groove, the bottom surface of which forms the light incident surface. The sidewall of the groove is provided along the thickness direction of the light guide plate to form a light blocking wall, which abuts against the light guide portion so that the light emitting portion is located in the groove.

[0018] To address the aforementioned technical problems, the second technical solution provided in this application is: to provide a display device. The display device includes:

[0019] Display panel, used to display images;

[0020] A backlight module is used to provide backlight to the display panel, the display panel being disposed on the side of the backlight module from which the light is emitted, and the backlight module being the backlight module as described in the above technical solution.

[0021] The beneficial effects of this application are as follows: Unlike existing technologies, this application provides a backlight module and a display device. The backlight module includes a light source assembly and a light guide plate. The light guide plate includes a light-incident surface and a light-emitting surface. The light source assembly is disposed on one side of the light-incident surface to guide the light emitted by the light source assembly into the light guide plate. Specifically, by including a light guide and light-emitting elements in the light source assembly, and by disposing the light guide on one side of the light-incident surface and the light-emitting elements at opposite ends of the light guide, the light emitted by the light-emitting elements can be guided into the light guide, and then guided out of the light guide to the light source. The light is directed onto the side near the light-incident surface to allow light to enter the light guide plate, thereby illuminating the backlight module. By employing a light guide and placing light-emitting elements at opposite ends of the light guide, only the opposite ends of the light guide need to be equipped with light-emitting elements, eliminating the need to place a large number of light-emitting elements on the light-incident surface of the light guide plate. This effectively reduces the number of light-emitting elements and lowers production costs. At the same time, by using a light guide, the light emitted by the light-emitting elements is evenly distributed after passing through the light guide. In other words, the uniform light distribution effect of the light guide can effectively prevent uneven brightness of the display panel caused by damage to individual light-emitting elements. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a partial structural schematic diagram of the backlight module provided in the first embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the planar structure of the backlight module provided in the first embodiment of this application;

[0025] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 4 yes Figure 1 A schematic diagram of the structure of the light source assembly provided in the embodiment;

[0027] Figure 5 yes Figure 4 A schematic diagram of the cross-section of the light guide provided in the embodiment;

[0028] Figure 6 This is a schematic diagram of the planar structure of the backlight module provided in the second embodiment of this application;

[0029] Figure 7This is a schematic diagram of the longitudinal cross-sectional structure of the backlight module provided in the third embodiment of this application;

[0030] Figure 8 yes Figure 7 A schematic diagram of the planar structure of the light source assembly provided in the embodiment;

[0031] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0032] Figure label:

[0033] 10-Light guide plate; 11-Groove; 12-Light blocking wall; 13-Light incident surface; 14-Light emitting surface; 20-Light source assembly; 21-Light guide component; 211-Light guide section; 212-Light emitting section; 22-Light emitting element; 23-End face; 24-Annular side; 241-Light emitting area; 242-Non-light emitting area; 25-Light shielding layer; 30-Back plate; 40-Reflector; 100-Backlight module; 200-Display panel. Detailed Implementation

[0034] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0035] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Please see Figure 1-3 , Figure 1 This is a partial structural schematic diagram of the backlight module provided in the first embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of the planar structure of the backlight module provided in the embodiment. Figure 3 yes Figure 2 A cross-sectional structural diagram along the AA direction. In this embodiment, a backlight module 100 is provided, which is used to illuminate the display panel 200 (see...). Figure 9 The backlight module 100 provides backlighting to enable the display panel 200 to display images. Specifically, the backlight module 100 includes a light source assembly 20 and a light guide plate 10. The light guide plate 10 includes a light incident surface 13 and a light emitting surface 14. The light source assembly 20 is disposed on one side of the light incident surface 13, so that the light emitted by the light source assembly 20 is introduced from the light incident surface 13 of the light guide plate 10, and then guided by the light guide plate 10 and emitted from the light emitting surface 14 to provide a uniform surface light source to the display panel 200.

[0041] Specifically, the light source assembly 20 includes a light guide 21 and light-emitting elements 22. The light guide 21 is disposed on one side of the light guide plate 10, specifically on one side of the light-incident surface 13 of the light guide plate 10. The light-emitting elements 22 are disposed at opposite ends of the light guide 21, so that the light guide 21 guides the light emitted by the light-emitting elements 22 and directs the light to the side of the light guide 21 near the light-incident surface 13 before entering the light guide plate 10. That is, the light-emitting elements 22 are disposed at both ends of the light guide 21, and the light emitted by the light-emitting elements 22 enters from the end faces 23 at opposite ends of the light guide 21, thereby being guided into the light guide 21. Then, the light is directed by the light guide 21 to the side of the light guide 21 near the light-incident surface 13 of the light guide plate 10, so that the light is guided into the light guide plate 10, thereby illuminating the backlight module 100. In this embodiment, a light guide 21 is used, and light-emitting elements 22 are provided at opposite ends of the light guide 21 to replace the lamp strips or lamp panels in the traditional backlight module 100. Compared with the traditional backlight module 100, in this embodiment, only light-emitting elements 22 need to be provided at opposite ends of the light guide 21. There is no need to provide a large number of light-emitting elements 22 on the light-incident surface 13 side of the light guide plate 10. Therefore, the number of light-emitting elements 22 used can be effectively reduced to reduce production costs. At the same time, by using the light guide 21, the light emitted by the light-emitting elements 22 is equalized after passing through the light guide 21. That is, the light uniformity effect of the light guide 21 can effectively prevent the problem of uneven brightness of the display panel 200 caused by damage to individual light-emitting elements 22.

[0042] Specifically, in this embodiment, the light-emitting element 22 can be a light-emitting diode (LED), an electroluminescent (EL) device, a sub-millimeter light-emitting diode (Mini LED), or a micron light-emitting diode (Micro LED), etc. The specific setting can be made according to actual needs, and there is no specific limitation.

[0043] Specifically, in a specific embodiment of this application, the light guide 21 includes a light guide portion 211 and a plurality of light emitting portions 212. The light guide portion 211 is disposed on one side of the light incident surface 13, and the plurality of light emitting portions 212 are distributed on the surface of the light guide portion 211 near the light guide plate 10. In a specific embodiment, the light guide portion 211 and the light emitting portions 212 may be made of the same material and may be integrally formed to enhance the light guiding capability. The light-emitting element 22 is disposed at opposite ends of the light guide portion 211 so that the light guide portion 211 guides the light emitted by the light-emitting element 22 and guides the light to the light emitting portion 212 before it enters the light guide plate 10. That is, the light emitted by the light-emitting element 22 enters the light guide portion 211 from the end faces 23 at opposite ends of the light guide portion 211, and then guides the light to the light emitting portion 212 through the light guide portion 211, so as to re-form a uniformly distributed point light source or a uniform surface light source in the light emitting portion 212, and finally guides the light into the light guide plate 10.

[0044] Among them, such as Figure 1 and Figure 3 As shown, in this embodiment, the light-emitting part 212 is a lens that protrudes toward the light-incident surface 13, and the surface of the light-emitting part 212 near the light-incident surface 13 is an arc surface that protrudes toward the light-incident surface 13. That is, the light-emitting part 212 is a convex lens that protrudes toward the light-incident surface 13 of the light guide plate 10, and the surface of the light-emitting part 212 near the light-incident surface 13 is an arc surface that protrudes toward the light-incident surface 13. Specifically, the curvature of the arc surface and the radial dimension of the light-emitting part 212 can be set according to actual needs, and there are no specific limitations on this. By making the light-emitting part 212 a convex lens that protrudes toward the light-incident surface 13 of the light guide plate 10, the range of the emission angle of the light output to the light-emitting part 212 can be larger, and the light can be more dispersed and balanced, thereby improving the uniformity of the light at the light-incident surface 13 of the light guide plate 10, thereby improving the brightness uniformity of the display panel 200. Furthermore, the light-emitting portions 212 are evenly distributed on the surface of the light guide portion 211 near the light guide plate 10 to further improve the uniformity of light at the light incident surface 13 of the light guide plate 10. At the same time, by setting a convex lens on the side surface of the light guide portion 211 near the light incident surface 13, a uniformly distributed point light source can be formed. Its light-emitting effect is the same as or similar to the light-emitting effect of the lamp panel or lamp strip in the conventional backlight module 100. It has a high degree of matching with the original light guide plate 10. Therefore, it is not necessary to make corresponding modifications to the light guide plate 10 due to the change of the light source assembly 20. Thus, the original light guide plate 10 can still be used, and it is not necessary to re-manufacture the light guide plate 10, saving the manufacturing process of the backlight module 100.

[0045] Please see Figure 4 and Figure 5 , Figure 4 yes Figure 1 A schematic diagram of the structure of the light source assembly provided in the embodiment is shown. Figure 5 yes Figure 4 A schematic diagram of the cross-section of the light guide provided in the embodiment is shown. The light guide 21 has an end face 23 and an annular side face 24, with a light-emitting element 22 disposed on one side of the end face 23. The annular side face 24 has a light-emitting region 241 and a non-light-emitting region 242, with a light-shielding layer 25 provided in the non-light-emitting region 242. ，This allows the light from the light guide 21 to exit from the light-emitting area 241 and then enter the light guide plate 10. Specifically, the surfaces of the ends of the light guide 211 closest to the light-emitting element 22 are end faces 23, and the sides along the circumference of the light guide 211 are annular side faces 24. The area on the annular side face 24 that overlaps with the light-emitting part 212 is the light-emitting area 241, and the part that does not overlap with the light-emitting part 212 is the non-light-emitting area 242. Furthermore, a light-shielding layer 25 is provided in the non-light-emitting area 242 to ensure that all light can exit from the light-emitting area 241 and to prevent light leakage caused by light exiting from the non-light-emitting area 242. The light-shielding layer 25 can be an opaque light-absorbing layer or a reflective layer for light-shielding. For example, the light-shielding layer 25 can be a black light-absorbing layer to absorb light emitted to the non-light-emitting area 242 and prevent light from escaping from the non-light-emitting area 242 and causing light leakage. Alternatively, the light-shielding layer 25 can be a metal reflective layer to reflect light emitted to the non-light-emitting area back into the light guide 21. This not only prevents light leakage but also improves the utilization rate of light. Therefore, a reflective layer is preferred as the light-shielding layer 25.

[0046] like Figure 1 and Figure 3 As shown, in this embodiment, the light guide plate 10 has a groove 11, the bottom surface of which forms a light-incident surface 13. A light-blocking wall 12 is formed along the thickness direction of the light guide plate 10 on the sidewall of the groove 11. The light-blocking wall 12 abuts against the light guide portion 211, so that the light emitting portion 212 is located within the groove 11. This allows all the light emitted from the light emitting portion 212 to be guided into the light guide plate 10, preventing light leakage between the light guide plate 10 and the light emitting portion 212, thus avoiding light leakage from the backlight module 100 and a reduction in light utilization. Specifically, the shape and depth of the groove 11 can be set according to actual needs. The depth of the groove 11 is sufficient to completely accommodate the light emitting portion 212 of the light guide member 21 within the groove 11. The shape of the bottom surface of the groove 11 and the distance between the light-incident surface 13 and the light emitting portion 212 can be set according to actual needs to ensure that the light guide plate 10 achieves the best light guiding effect. The length of the light-blocking wall 12 along the length direction parallel to the light guide 21 is the same as the overall length of the light source assembly 20, which can simultaneously prevent light leakage from the light-emitting part 212 and the light-emitting element 22.

[0047] Specifically, such as Figure 1-5As shown, the backlight module 100 provided in the above embodiment is a side-lit backlight module. The side of the light guide plate 10 is the light-incident surface 13, and the top surface of the light guide plate 10 is the light-emitting surface 14. In this embodiment, the light guide part 211 is strip-shaped and is disposed on one side of the light-incident surface 13 of the light guide plate 10. Multiple light-emitting parts 212 are evenly distributed along the length direction of the light guide part 211 on the surface of the light guide part 211 near the light guide plate 10. Specifically, the light guide part 211 is a long strip-shaped lens for guiding light. The surface of the light guide part 211 on the side near the light guide plate 10 is a plane parallel to the light-incident surface 13. Multiple light-emitting parts 212 are evenly distributed along the length direction of the light guide part 211 on this plane. That is, in any area on this plane, the number of light-emitting parts 212 per unit area is the same, thereby forming a uniform light source so that the light on the light-incident surface 13 of the light guide plate 10 is more uniform.

[0048] In this embodiment, the backlight module 100 may include a light source assembly 20, and a light guide portion 211 corresponding to two light-emitting elements 22. The two light-emitting elements 22 are respectively disposed at opposite ends of the light guide portion 211 along the length direction. That is, the backlight module 100 only needs to provide two light-emitting elements 22, saving a large number of light-emitting elements 22, thereby effectively reducing production costs. When the display panel 200 does not have high brightness requirements for the backlight module 100, this backlight module 100 can be used. The backlight module 100 only needs two light-emitting elements 22 to provide a relatively balanced backlight to the display panel 200, saving a large number of light-emitting elements 22 and effectively reducing production costs. At the same time, by disposing the light-emitting elements 22 at opposite ends of the light guide portion 211 along the length direction, and matching the overall length of the light source assembly 20 with the size of the light guide plate 10, in this embodiment, the opposite ends of the light source assembly 20 are flush with the light guide plate 10, which also facilitates the narrow bezel design of the display panel 200.

[0049] In this embodiment, as Figure 1 As shown, the backlight module 100 also includes an optical film (not shown) and a back plate 30. The back plate 30 has a receiving groove in which the light guide plate 10 and the light source assembly 20 are disposed. Furthermore, a reflector 40 is disposed between the light guide plate 10 and the bottom of the receiving groove to reflect light, thereby reducing light loss and improving light utilization. The optical film is disposed on one side of the light-emitting surface 14 of the light guide plate 10 to further process the light and improve the light output quality of the backlight module 100. The optical film may include a brightness enhancement film, a diffuser film, a polarizer film, etc., and can be specifically configured according to actual needs without specific limitations.

[0050] Please see Figure 6 , Figure 6This is a schematic diagram of the planar structure of the backlight module provided in the second embodiment of this application. In this embodiment, the provided backlight module 100 is also a side-lit backlight module. Unlike the backlight module 100 provided in the first embodiment, this backlight module 100 includes two light source components 20. The two opposite sides of the light guide plate 10 are both light incident surfaces 13. The two light source components 20 are respectively disposed on opposite sides of the light guide plate 10, opposite to the light incident surfaces 13, so as to guide light from the light incident surfaces 13 to the light guide plate 10. This embodiment uses two light source components 20, that is, four light-emitting elements 22 are required. The overall brightness of the backlight module 100 is higher and it can be applied to most display panels 200. Moreover, this embodiment only uses four light-emitting elements 22 to achieve the same brightness as the traditional backlight module 100, saving the number of light-emitting elements 22 used. In addition, the structure of the light source components 20 is simple and easy to manufacture, saving the manufacturing process and improving production efficiency.

[0051] Of course, in other embodiments, if higher brightness requirements are placed on the backlight module 100, three, four, or more light source components 20 can be used, depending on the shape of the display panel 200 and the light guide plate 10, so that the brightness of the backlight module 100 can meet the requirements. The specific structure, function, and arrangement of the light source components 20 are the same as or similar to those in the above embodiments, as detailed above, and will not be repeated here.

[0052] Please see Figure 7 , Figure 7 This is a longitudinal cross-sectional structural diagram of the backlight module provided in the third embodiment of this application. In this embodiment, a backlight module 100 is provided, which is a direct-lit backlight module.

[0053] Please see Figure 8 , Figure 8 yes Figure 7 A schematic diagram of the planar structure of the light source assembly provided in the embodiment is shown. In this embodiment, the top and bottom surfaces of the light guide plate 10 are respectively the light-emitting surface 14 and the light-incident surface 13. Specifically, the top surface of the light guide plate 10 is the light-emitting surface 14, and the bottom surface is the light-incident surface 13. The light source assembly 20 is disposed on the bottom surface side, wherein the light guide portion 211 of the light guide member 21 is plate-shaped and is disposed opposite to the light guide plate 10. A plurality of light-emitting portions 212 are evenly distributed on the surface of the light guide portion 211 near the light guide plate 10 to form a uniform point light source, thereby making the light uniformity on the light-incident surface 13 of the light guide plate 10 higher.

[0054] In this backlight module 211, multiple light-emitting elements 22 are arranged at opposite ends along a direction parallel to the light guide 211, and these multiple light-emitting elements 22 are arranged along the length of the side surface of the light guide 211. That is, the opposite side surfaces of the light guide 211 are its opposite ends, and light-emitting elements 22 are arranged at these opposite sides, with the multiple light-emitting elements 22 arranged along the length of the side surface to provide light to the light guide 211. Specifically, the arrangement of the multiple light-emitting elements 22 along the length of the side surface of the light guide 211 can be designed according to actual needs, such as uniform or non-uniform arrangement, to ensure that all the light emitted by the light-emitting elements 22 is guided into the light guide 211. This backlight module 100 only needs to arrange multiple light-emitting elements 22 on opposite sides of the light guide 211 to achieve the required brightness. Compared to the traditional direct-lit backlight module 100, which requires a large area of ​​light-emitting elements 22 on the bottom surface of the light guide plate 10, this effectively reduces the number of light-emitting elements 22 used and saves production costs.

[0055] Furthermore, in other embodiments, to simplify the structure of the light source assembly 20 and improve the uniformity of the light field provided by the light source assembly 20, the light guide 21 may only include a light guide portion 211 without providing a convex lens as a light emitting portion 212. The side of the light guide portion 211 near the light-incident surface 13 of the light guide plate 10 is not provided with a light-shielding layer 25 and is transparent. That is, the surface of the light guide portion 211 near the light-incident surface 13 of the light guide plate 10 is the light emitting area 241. The light guide portion 211 guides the light emitted by the light-emitting element 22 and guides the light to the light emitting area 241 to form a uniform surface light source. The light is emitted from the light emitting area 241 and then enters the light guide plate 10. This not only saves the structure and materials of the light emitting portion 212, but also reduces the area of ​​the light-shielding layer 25, increases the light emitting area, and improves the uniformity of the light source, thereby improving the light emission quality of the backlight module 100.

[0056] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. In this embodiment, a display device is provided, which includes a display panel 200 and a backlight module 100 for displaying images.

[0057] The display panel 200 is used to display images. Specifically, the display panel 200 can be a liquid crystal display panel 200 or an electrophoretic display panel 200, or any other display panel 200 requiring a backlight. Specifically, the backlight module 100 provides backlight to the display panel 200. The display panel 200 is located on the light-emitting side of the backlight module 100 and receives the backlight source and controls the light transmittance to control the display brightness or grayscale of the sub-pixels, thereby displaying the corresponding image. Specifically, the specific structure and function of the backlight module 100 are the same as or similar to those of the backlight module 100 involved in the above embodiments, as described above; further details are omitted here.

[0058] Specifically, in combination Figure 1 The display device can be obtained through the following assembly steps:

[0059] Assemble the reflector and light guide plate 10;

[0060] Assemble the light guide 21 and the light-emitting element 22;

[0061] Assemble optical films and optical components;

[0062] Assemble components such as the frame and display panel 200.

[0063] In this embodiment, the backlight module 100 includes a light source assembly 20 and a light guide plate 10. The light guide plate 10 includes a light-incident surface 13 and a light-emitting surface 14. The light source assembly 20 is disposed on one side of the light-incident surface 13 to guide the light emitted by the light source assembly 20 into the light guide plate 10. Specifically, by including a light guide 21 and a light-emitting element 22 in the light source assembly 20, the light guide 21 is disposed on one side of the light-incident surface 13, and the light-emitting element 22 is disposed at opposite ends of the light guide 21. This allows the light emitted by the light-emitting element 22 to be guided into the light guide 21, and then guided out to the side of the light guide 21 near the light-incident surface 13, thereby... Light enters the light guide plate 10, thereby illuminating the backlight module 100. By using the light guide 21 and setting light-emitting elements 22 at opposite ends of the light guide 21, it is only necessary to set the light-emitting elements 22 at opposite ends of the light guide 21, without setting a large number of light-emitting elements 22 on one side of the light-incident surface 13 of the light guide plate 10. This effectively reduces the number of light-emitting elements 22 and lowers production costs. At the same time, by using the light guide 21, the light emitted by the light-emitting elements 22 is equalized after passing through the light guide 21. That is, the uniform light effect of the light guide 21 can effectively prevent the problem of uneven brightness of the display panel 200 caused by damage to individual light-emitting elements 22.

[0064] The above are merely embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A backlight module, comprising a light source assembly and a light guide plate, wherein the light guide plate includes a light incident surface and a light emitting surface, and the light source assembly is disposed on one side of the light incident surface; Its features are, The light source assembly includes: A light guide is disposed on one side of the light-incident surface; the light guide includes a light-guiding portion and a plurality of light-emitting portions, the light-guiding portion is disposed on one side of the light-incident surface, and the plurality of light-emitting portions are distributed on the surface of the light-guiding portion near the light-guiding plate; the plurality of light-emitting portions are evenly and spaced apart along the length direction of the light guide; the light guide has an end face and an annular side face, the annular side face has a light-emitting area and a non-light-emitting area, the area on the annular side face that coincides with the light-emitting portion is the light-emitting area, and the part that does not coincide with the light-emitting portion is the non-light-emitting area, the light-emitting area is used to guide light from the light-emitting portion to the light-guiding plate; the light-emitting portion is a lens convex toward the light-incident surface, and the surface of the light-emitting portion near the light-incident surface is an arc surface convex toward the light-incident surface; Light-emitting elements are disposed at opposite ends of the light guide, so that the light guide guides the light emitted by the light-emitting elements and directs the light to the side of the light guide near the light-incident surface before it enters the light guide plate.

2. The backlight module according to claim 1, characterized in that, The light-emitting element is disposed on one side of the end face; the non-light-emitting area is provided with a light-shielding layer so that the light entering the light guide is emitted from the light-emitting area and then enters the light guide plate.

3. The backlight module according to claim 1, characterized in that, The backlight module is a side-lit backlight module, the side of the light guide plate is the light incident surface, the light guide part is strip-shaped, and a plurality of light emitting parts are evenly distributed along the length direction of the light guide part on the surface of the light guide part near the light guide plate.

4. The backlight module according to claim 3, characterized in that, The light guide portion corresponds to two light-emitting elements, and the two light-emitting elements are respectively disposed at opposite ends of the light guide portion along its length direction.

5. The backlight module according to claim 1, characterized in that, The backlight module is a direct-lit backlight module. The top and bottom surfaces of the light guide plate are the light-emitting surface and the light-incident surface, respectively. The light guide part is plate-shaped and is disposed opposite to the light guide plate. A plurality of light-emitting parts are evenly distributed on the surface of the light guide part near the light guide plate.

6. The backlight module according to claim 5, characterized in that, The light guide portion has a plurality of light-emitting elements disposed at opposite ends along a direction parallel to the light guide portion, and the plurality of light-emitting elements are arranged along the length direction of the side surface of the light guide portion.

7. The backlight module according to claim 1, characterized in that, The light guide plate has a groove, the bottom surface of the groove forms the light incident surface, and the sidewall of the groove is provided along the thickness direction of the light guide plate to form a light blocking wall. The light blocking wall abuts against the light guide part so that the light emitting part is located in the groove.

8. A display device, characterized in that, The display device includes: Display panel, used to display images; A backlight module is used to provide backlight to the display panel, the display panel being disposed on the side of the backlight module from which light is emitted, and the backlight module is the backlight module as described in any one of claims 1-7.

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