Backlight module and display module

Abstract

The utility model discloses a backlight module and a display module and relates to the technical field of display modules, the backlight module comprises a back plate, the back plate comprises a first frame edge arranged on the edge of an optical film and a second frame edge used for being connected with a display panel, and one end, connected with the second frame edge, of the first frame edge forms a limiting notch; the opening direction of the limiting gap is opposite to the optical film, and the limiting gap is used for installing the middle frame.

Description

Technical Field

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

[0002] The backlight module is a collection of components that make up the core display part of the display module. It includes elements such as the light source, light guide plate, back plate, mid-frame assembly, and optical films. The back plate is the main component of the backlight module, used to support the LCD panel and fix the electronic and optical films. The mid-frame and back plate together enclose an internal space to accommodate the LCD panel, backlight module, etc.

[0003] In traditional backlight modules, C-shaped and F-shaped backplates are used in conjunction with mid-frames typically designed with T-shaped and U-shaped cross-sections. The openings of C-shaped backplates are relatively weak and prone to deformation under external forces; while the flange connections of F-shaped backplates are prone to localized damage due to stress concentration. This deficiency results in a lack of flexibility for C-shaped and F-shaped backplate structures when adapting to other mid-frame shapes, making them unsuitable for various mid-frame configurations. Due to this poor adaptability, replacing or upgrading the mid-frame often requires replacing the entire backplate, increasing costs. Utility Model Content

[0004] The main purpose of this utility model is to propose a backlight module and a display module, which aims to solve the technical problems in related technologies where the back panel cross-section is set in a C-shape or F-shape, resulting in thin thickness and easy deformation leading to screen cracking, poor compatibility and high cost due to the need to use it in conjunction with the middle frame edge.

[0005] To achieve the above objectives, the present invention proposes a backlight module, which includes a back plate. The back plate includes a first frame edge disposed at the edge of an optical film and a second frame edge for connecting a display panel. A limiting notch is formed at one end of the first frame edge connecting to the second frame edge. The opening direction of the limiting notch is opposite to that of the optical film. The limiting notch is used to install a middle frame.

[0006] This utility model also proposes a display module, which includes the backlight module described above and a display panel disposed on the light-emitting side of the backlight module. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figure 1 A schematic diagram of the structure of an embodiment of the backlight module provided by this utility model;

[0009] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0010] Figure 3 This is a schematic diagram of the structure of one embodiment of the backlight module provided by this utility model;

[0011] Figure 4 A schematic diagram of a second embodiment of the backlight module provided by this utility model;

[0012] Figure 5 A schematic diagram of the structure of a third embodiment of the backlight module provided by this utility model;

[0013] Figure 6 This is a schematic diagram of a fourth embodiment of the backlight module provided by this utility model.

[0014] Explanation of icon numbers:

[0015] 100. Backlight module; 1. Back panel; 11. First frame edge; 12. Second frame edge; 13. Limiting notch; 131. First surface; 132. Second surface; 14. Third frame edge; 2. Middle frame assembly; 21. First mating section; 22. First support section; 23. Second mating section; 24. First connecting section; 25. Second support section; 26. Second connecting section; 27. Third support section; 28. Fourth support section;

[0016] 200, screen; 300, optical components.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] This utility model proposes a backlight module 100.

[0022] Please see Figures 1 to 6 In one embodiment of the present invention, the backlight module includes a back plate 1. The back plate 1 includes a first frame edge 11 disposed at the edge of the optical film and a second frame edge 12 for connecting the display panel. A limiting notch 13 is formed at one end of the first frame edge 11 near the second frame edge 12. The opening direction of the limiting notch 13 is opposite to that of the optical film. The limiting notch 13 is used to install the middle frame 2.

[0023] In this embodiment, it should be noted that the backlight module of this application can be applied to mobile phones, televisions, computers, and other fields. This embodiment uses an LCD television as an example for further explanation. The backplate 1 provided in this application can be adapted to various displays, including but not limited to full-screen, floating screen, and bezel screen, etc., and can be configured according to requirements. Combined with... Figure 1 and Figure 2As can be seen, the back plate 1 includes multiple frame segments, including a first frame segment 11 disposed at the edge of the optical film, a second frame segment 12 for connecting the display panel, a third frame segment 14 for supporting the light source, and a fourth frame segment. The improvements of the back plate 1 are mainly concentrated on the first frame segment 11 and the second frame segment 12; the other frame segments are not described in detail. It is understood that the limiting notch 13 is disposed at the end of the first frame segment 11 near the second frame segment 12, and the opening direction of the limiting notch 13 is opposite to the optical film, that is, the platform of the limiting notch 13 is disposed facing the outside of the back plate 1 (the formed cavity). At the same time, the cross-section of the back plate 1 provided in this application has the limiting notch 13, which can be adapted to different shapes of the middle frame assembly 2, and the limiting notch 13 can support the frame of the middle frame assembly 2 of different shapes. The backplate 1 with a limiting notch 13 provided in this application, compared to the C-shaped cross-section backplate 1 in the prior art, uses a bending process between the first frame edge 11 and the second frame edge 12 of the backplate 1 in this application to form a limiting notch 13. The limiting notch 13, corresponding to the edge formed by the bending process, has stronger strength, thus enhancing the deformation resistance of the backplate 1. Simultaneously, due to the bending process used on the backplate 1 (the formation of the limiting notch 13), a height difference exists between the first frame edge 11 and the second frame edge 12. When the backplate 1 of this solution is used only in the backlight module, it can be adapted to the design of a floating screen. This height difference makes the floating screen effect more pronounced, meaning the second frame edge 12 provides more effective support for the floating screen. It should be noted that the specific implementation method for the forming angle of the limiting notch 13 is shown in the next embodiment. Compared with the back plate 1 with an F-shaped cross section in the prior art, the back plate 1 with limiting notch 13 provided in this application has a simpler mold process, only requires one-time molding, has a smaller visible thickness value (i.e. the value along the extension direction of the first frame edge 11), and uses less material.

[0024] The technical solution of this utility model forms a limiting notch 13 at the end of the first frame edge 11 away from the second frame edge 12. This limiting notch 13 is used to allow the back plate 1 to cooperate with other external components. Compared with the back plate 1 in the prior art, which usually has a C-shaped or F-shaped cross-section, the back plate 1 provided by this application can provide more stable support due to the presence of the limiting notch 13, and can adapt to a variety of different shaped middle frame components. At the same time, the presence of the limiting notch can effectively enhance the overall rigidity of the back plate 1, so that it can better resist bending and torsion when subjected to external forces, reducing the possibility of deformation. Moreover, compared with the back plate 1 with an F-shaped cross-section, the back plate 1 provided by this application uses less material. In addition, the middle frame component 2 adapted to by the back plate 1 of this application not only uses less material, but also has a more stable structure and is not easy to bend and deform. It can adapt to a variety of different shaped middle frame components 2 without changing the shape of the back plate 1, effectively controlling costs and improving the adaptability of the back plate 1.

[0025] In one embodiment of the present invention, the limiting notch 13 has a first surface 131 and a second surface 132, and the first surface 131 and the second surface 132 are arranged at an angle.

[0026] In this embodiment, it should be noted that the limiting notch 13 includes a first surface 131 and a second surface 132 connected to each other. The first surface 131 is connected to the first frame edge 11, that is, the first surface 131 is intersecting the extension direction of the optical film. The second surface 132 is connected to the second frame edge 12, that is, the second surface 132 is parallel to the extension direction of the optical film. Figure 2 It can be seen that the first surface 131 and the second surface 132 are set at an angle, which includes, but is not limited to, 45, 60, and 90 degrees. Preferably, the first surface 131 and the second surface 132 are set perpendicularly to each other (i.e., the angle is 90 degrees). The above arrangement enhances the structural stability of the back plate 1 cross section and also enables the back plate 1 to more effectively support the optical film and the display panel.

[0027] In one embodiment of the present invention, the backlight module further includes a middle frame component 2, which is connected to the first frame edge 11, and a portion of the structure of the middle frame component 2 is limited to the limiting notch 13.

[0028] In this embodiment, it should be noted that the mid-frame assembly 2, as a key structural component in the backlight module, is used to support the liquid crystal panel and fix the optical film. To adapt the backplate 1 to the requirements of both bezel-less and full-screen displays, the mid-frame assembly 2 is set on top of the backplate 1. Combined with... Figures 3 to 6 The middle frame assembly 2 is connected to the outer wall of the back plate 1 (i.e., the first frame edge 11 of the optical film), and a portion of the structure of the middle frame assembly 2 is in close contact with the limiting notch 13. The material of the middle frame assembly 2 includes, but is not limited to, various materials such as plastic and metal, and may also differ from the appearance color of the back plate 1; this is not limited here. The following embodiments are preferred combinations of the back plate 1 adapted to different shapes of middle frame assemblies 2 in this application. The shape of the middle frame assembly 2 is not limited here and can be set according to actual needs.

[0029] In one embodiment of the present invention, the middle frame assembly 2 includes a first mating section 21 and a first supporting section 22. The first mating section 21 and the first supporting section 22 are arranged perpendicularly to each other. The first mating section 21 is connected to the limiting notch 13. The end of the first mating section 21 near the first frame edge 11 abuts against the first frame edge 11.

[0030] In this embodiment, combined with Figure 3It is understood that the first mating section 21 is placed on the limiting notch 13 and fits tightly with the limiting notch 13 to ensure that the position of the middle frame assembly 2 on the back plate 1 is accurately positioned and fixed; the first support section 22 is placed on the first frame edge 11 near the limiting notch 13, thereby providing stable support for the display panel. It can be understood that the first mating section 21 and the first support section 22 are arranged in a T-shape, with the first support section 22 connected to the middle of the first mating section 21. Compared with the combination of the back plate 1 with a C-shaped cross section and the middle frame assembly 2 with a T-shaped cross section in the prior art, in this application, due to the existence of the limiting notch 13 on the back plate 1, the length of the first mating section 21 of the middle frame assembly 2 is shorter, and the first mating section 21 can overlap the limiting notch 13 for assembly and positioning. At the same time, the end of the first mating section 21 away from the first support section 22 is aligned with the first frame edge 11, and can also be convex or recessed, which is not limited here. It is understandable that the first mating section 21 and the limiting notch 13 are connected by adhesive, specifically using optical adhesives such as VHB glue. It should be noted that the combination of the mid-frame assembly 2 and the back panel 1 provided in this application is applicable to full-screen solutions.

[0031] In one embodiment of the present invention, the middle frame component 2 includes a second mating section 23 and a first connecting section 24 connected to each other. The second mating section 23 and the first connecting section 24 are both arranged along the extension direction of the first frame edge 11. One end of the second mating section 23 is formed, and the abutting surface abuts against the limiting notch 13. The first connecting section 24 is located outside the first frame edge 11.

[0032] In this embodiment, combined with Figure 5 and Figure 6 It can be seen that the second mating section 23 is the section that fits into the limiting notch 13, and the first connecting section 24 is connected to the outside of the first frame edge 11. The connection here is achieved by adhesive bonding using optical adhesives such as VHB glue. Both the second mating section and the first connecting section are arranged along the extension direction of the first frame edge, making the mid-frame assembly 2 of this solution generally arranged in a straight line. The end of the second mating section 23 near the limiting notch 13 forms an abutment surface, which contacts the limiting notch 13 to achieve the assembly and positioning of the mid-frame assembly 2 and the back plate 1. Compared with the C-shaped cross-section of the back plate 1 and the T-shaped cross-section of the mid-frame assembly 2 in related technologies, the back plate 1 with the limiting notch 13 and the straight-line mid-frame assembly 2 provided in this application have lower costs and require less material for the mid-frame assembly 2. It should be noted that the combination method of the mid-frame assembly 2 and the back plate 1 here can be applied to full-screen or floating screen solutions.

[0033] In one embodiment of the present invention, the middle frame assembly 2 further includes a second support section 25, which abuts against the first frame edge 11 and is perpendicularly intersecting the first connecting section 24.

[0034] In this embodiment, in order to enhance the structural stability of the middle frame component 2, combined with Figure 6 ,exist Figure 5 In the shown mid-frame assembly 2, a second support section 25 is provided below the first connecting section 24. The second support section 25 is L-shaped, which can effectively fix and protect the second frame edge 12 of the back panel 1, while reducing light leakage in this area and improving the light utilization rate and display effect of the backlight module. Furthermore, compared to the U-shaped cross-section mid-frame assembly 2 in related technologies, the mid-frame assembly 2 provided in this application has a lower cost and uses less material. Moreover, due to the abutment arrangement of the second support section 25 with the first frame edge 11 and the third frame edge 14, the optical components are more reliably fixed to the back panel 1, and the internal overlap value of the optical film is larger. It should be noted that the combination of the mid-frame assembly 2 and the back panel 1 here can be applied to full-screen or floating screen solutions.

[0035] In one embodiment of the present invention, the cross-sectional shape of the second mating section 23 gradually increases from the end away from the first connecting section 24 to the end close to the first connecting section 24.

[0036] In this embodiment, in order to better adapt to the shape of the limiting notch 13, improve the fit between the middle frame assembly 2 and the back plate 1, and reduce stress concentration caused by shape mismatch, the cross-sectional shape of the second mating section 23 is gradually enlarged to provide a larger contact area, making the connection between the second mating section 23 and the limiting notch 13 tighter and more stable, thereby enhancing the structural stability of the entire middle frame assembly 2.

[0037] In one embodiment of the present invention, the middle frame assembly 2 includes a second connecting segment 26 extending along the first frame edge 11, a fourth support segment 28 abutting against the first frame edge 11, and a third support segment 27 arranged parallel to the fourth support segment 28. The third support segment 27, the second connecting segment 26, and the fourth support segment 28 are connected in sequence, and the second connecting segment 26 is connected to the first frame edge 11.

[0038] In this embodiment, it should be noted that the combination of the mid-frame assembly 2 and the back plate 1 is applicable to bezel screen solutions. The second connecting segment 26 is connected to the first frame edge 11 by adhesive bonding using optical adhesives such as VHB. The second connecting segment 26 extends along the first frame edge 11 and is located on the outer wall of the first frame edge 11. The third support segment 27 and the fourth support segment 28 are respectively located at both ends of the second connecting segment 26 and are perpendicularly intersecting the second connecting segment 26, resulting in a U-shaped mid-frame assembly 2. Figure 4As can be seen, the mid-frame component 2, i.e., part of the third support section 27, abuts against the display panel. The U-shaped mid-frame component 2 can tightly wrap around the back panel 1, forming a relatively stable frame structure, effectively preventing the back panel 1 from shifting or deforming inside the module, thereby improving the structural stability of the entire backlight module. The U-shaped design helps to achieve a thinner and lighter backlight module design, meeting the requirements of narrow bezels for bezel-screen displays. The U-shaped mid-frame component 2 helps to improve the overall flatness of the backlight module, reduce light leakage, and thus improve the uniformity and contrast of the displayed image.

[0039] In one embodiment of this utility model, the middle frame assembly 2 is bonded to the back plate 1.

[0040] In this embodiment, combined with Figures 3 to 6 It can be seen that the middle frame component 2 is connected to the first frame edge 11 of the back plate 1. The preferred connection method here is adhesive bonding, which is achieved by using optical adhesives such as VHB glue.

[0041] This utility model also proposes a display module, which includes the backlight module and display panel described above. The specific structure of the backlight module is as described in the above embodiments. Since this backlight module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. The display panel is located on the light-emitting side of the backlight module. This arrangement improves display quality, enhances structural stability, and optimizes space utilization.

[0042] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A backlight module, characterized in that, The backlight module includes a back plate, which includes a first frame edge disposed at the edge of the optical film and a second frame edge for connecting the display panel. One end of the first frame edge connected to the second frame edge forms a limiting notch. The opening direction of the limiting notch is opposite to that of the optical film. The limiting notch is used to install the middle frame.

2. The backlight module of claim 1, wherein, The limiting notch has a first surface and a second surface, with the first surface and the second surface arranged at an angle.

3. The backlight module of any of claims 1-2, wherein, The backlight module also includes a mid-frame assembly, which is connected to the first frame edge, and a portion of the structure of the mid-frame assembly is confined within the limiting notch.

4. The backlight module of claim 3, wherein, The back panel has a first frame edge and a second frame edge. The middle frame assembly includes a first mating section and a first supporting section. The first mating section and the first supporting section are arranged perpendicularly to each other. The first mating section is connected to the limiting notch. The end of the first mating section near the first frame edge abuts against the first frame edge.

5. The backlight module of claim 3, wherein the light source is a light emitting diode (LED). The middle frame assembly includes a second mating section and a first connecting section connected to each other. The second mating section and the first connecting section are both arranged along the extension direction of the first frame edge. One end of the second mating section forms an abutting surface, which abuts against the limiting notch. The first connecting section is located outside the first frame edge.

6. The backlight module of claim 5, wherein, The middle frame assembly further includes a second support section, which abuts against the first frame edge and is perpendicularly intersecting the first connecting section.

7. The backlight module of claim 6, wherein, The cross-sectional shape of the second mating section gradually increases from the end furthest from the first connecting section to the end closest to the first connecting section.

8. The backlight module of claim 3, wherein, The middle frame assembly includes a second connecting segment extending along the first frame edge, a fourth support segment abutting against the first frame edge, and a third support segment parallel to the fourth support segment. The third support segment, the second connecting segment, and the fourth support segment are connected in sequence, and the second connecting segment is connected to the first frame edge.

9. The backlight module of claim 3, wherein, The middle frame assembly is bonded to the back panel.

10. A display module, characterized by The display module includes a backlight module as described in any one of claims 1 to 9 and a display panel disposed on the light-emitting side of the backlight module.

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