Backlight modules and display devices

Abstract

This utility model discloses a backlight module and a display device, relating to the field of display device technology. The backlight module includes a lamp board, a back plate, and a locking structure. The back plate is disposed on one side of the lamp board. The locking structure includes a connecting abutment section and an elastic snap-fit ​​part. The elastic snap-fit ​​part penetrates the lamp board and snaps into the back plate. The abutment section abuts against the surface of the lamp board facing away from the back plate.

Description

Technical Field

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

[0002] As a core component of modern electronic devices, displays are widely used in consumer electronics, industrial control, and public information display. Their structure typically includes a display panel, mounting frame, LED backlight board, backplate, and several internal optical films. Among these, the LED backlight board, as a key component for backlighting or direct display, must be reliably connected to the backplate to ensure optical performance, heat dissipation efficiency, and long-term stability.

[0003] Currently, the industry commonly uses screws to mechanically connect LED light boards and backplates. Specifically, screws are passed through pre-drilled holes in the light board and screwed into corresponding threaded holes in the backplate to secure them. However, this connection method not only suffers from low assembly efficiency but also carries the risk of localized stress damage. This is because the concentrated pressure generated during screw tightening can easily cause localized deformation of the light board, potentially damaging its internal circuitry or ceramic substrate structure. This can lead to problems such as obstructed heat dissipation paths and uneven heat distribution, accelerating LED chip light decay and even causing LED failure. Utility Model Content

[0004] The main purpose of this utility model is to propose a backlight module and display device, which aims to solve the problem that the existing lamp board and back plate are connected by screws, causing the lamp board to be prone to deformation.

[0005] To achieve the above objectives, the present invention proposes a backlight module, wherein the backlight module comprises:

[0006] Light panel;

[0007] A backplate, disposed on one side of the light panel; and

[0008] A locking structure includes a connecting abutment section and an elastic snap-fit ​​part, the elastic snap-fit ​​part passing through the lamp panel and snapping with the back plate, and the abutment section abutting against the surface of the lamp panel facing away from the back plate.

[0009] This utility model also proposes a display device, which includes the backlight module described above. Attached Figure Description

[0010] 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.

[0011] Figure 1 A schematic diagram of the structure of an embodiment of the backlight module provided by this utility model;

[0012] Figure 2 A schematic diagram of another embodiment of the backlight module provided by this utility model;

[0013] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0014] Figure 4 A schematic diagram of the locking structure in another embodiment of the backlight module provided by this utility model;

[0015] Figure 5 A schematic diagram of the bottom surface structure of the abutment section of the locking structure in one embodiment of the backlight module provided by this utility model;

[0016] Figure 6 This is a schematic diagram of the bottom surface structure of the locking structure's abutment section in another embodiment of the backlight module provided by this utility model.

[0017] Explanation of icon numbers:

[0018] 100. Backlight module; 1. Lamp board; 2. Back panel; 21. Snap-in hole; 3. Locking structure; 31. Abutting section; 311. Friction-enhancing structure; 32. Elastic buckle; 321. Fixing section; 322. Guide section.

[0019] 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

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Currently, the industry commonly uses screws to mechanically connect LED light boards and backplates. Specifically, screws are passed through pre-drilled holes in the light board and screwed into corresponding threaded holes in the backplate to secure them. However, this connection method not only suffers from low assembly efficiency but also carries the risk of localized stress damage. This is because the concentrated pressure generated during screw tightening can easily cause localized deformation of the light board, potentially damaging its internal circuitry or ceramic substrate structure. This can lead to problems such as obstructed heat dissipation paths and uneven heat distribution, accelerating LED chip light decay and even causing LED failure.

[0024] This utility model proposes a backlight module.

[0025] Please see Figures 1 to 3 In one embodiment of this utility model, the backlight module 100 includes:

[0026] Light panel 1;

[0027] Back panel 2, located on one side of light panel 1; and

[0028] The locking structure 3 includes a connecting abutment section 31 and an elastic snap-fit ​​part. The elastic snap-fit ​​part penetrates the lamp panel 1 and snaps into the back plate 2. The abutment section 31 abuts against the surface of the lamp panel 1 facing away from the back plate 2.

[0029] The technical solution of this utility model, through the setting of a locking structure 3, can effectively fix the lamp panel 1 and the back plate 2. Specifically, the elastic snap-fit ​​part in the locking structure 3 can be deformed by hand and directly penetrates the lamp panel 1 and snaps into the back plate 2. The abutting section 31 will automatically abut against the surface of the lamp panel 1 facing away from the back plate 2 for limiting the position, without the need for screws, glue or other auxiliary tools, effectively improving assembly efficiency. In addition, the abutting section 31 covers the surface of the lamp panel 1 facing away from the back plate 2, and disperses the locking pressure through surface contact, avoiding local stress concentration caused by traditional screw fixing. The pressure distribution on the surface of the lamp panel 1 is relatively uniform, effectively preventing the lamp panel 1 from warping or developing micro-cracks.

[0030] Specifically, the locking structure 3 can be an elastic hook, and the abutment section 31 can be made of metal or stainless steel. The elastic hook can be integrally stamped with the abutment section 31, and the elastic hook can be divided into two parts: a vertical arm and a barb. The vertical arm extends vertically from one end of the abutment section 31 to pass through the pre-set through hole on the lamp panel 1, while the barb is located at the end of the vertical arm and tilts outward at a certain angle to cooperate with the slot on the edge of the back plate 2 to form a one-way lock. During assembly, simply press the abutment section 31 to retract the vertical arm, and the barb passes through the through hole of the lamp panel 1 and enters the slot of the back plate 2. After releasing the pressure, the barb elastically resets, achieving rigid locking between the lamp panel 1 and the back plate 2. Optionally, the back plate 2 can be provided with dumbbell-shaped through holes, and the elastic locking part can also be an arc-shaped spring arm, with its two ends fixed to the abutment section 31 respectively, and the middle part suspended to form a deformation space. Pressing down the abutment section 31 causes the middle part of the arc-shaped spring arm to deform and concave. After entering the locking through hole 21, the spring arm returns to its original shape. The arc-shaped parts at both ends are interference-fitted with the wide part of the dumbbell hole, generating radial locking force and improving the fixing strength. Of course, in other embodiments, the locking structure 3 can also be a spring plunger or spring clip, as long as it can serve the purpose of fixing the lamp plate 1 and the back plate 2.

[0031] In the embodiments of this utility model, please refer to Figure 4The elastic snap-fit ​​part includes at least two elastic snaps 32 arranged opposite each other, with the two elastic snaps 32 spaced apart to form a deformation space. The back plate 2 is provided with a snap-fit ​​through hole 21. The two elastic snaps 32 approach each other and press to insert into the snap-fit ​​through hole 21, and use the rebound force of the elastic snaps 32 to press against the hole wall of the snap-fit ​​through hole 21. In this embodiment, the elastic snap-fit ​​part adopts a symmetrical double snap-fit ​​design, with the two elastic snaps 32 symmetrically distributed. After being pressed, they synchronously contract towards the deformation space. In this way, after being inserted into the snap-fit ​​through hole 21, the rebound generates a bidirectional clamping force, avoiding skewing or loosening caused by unilateral force, and effectively improving the uniformity of the fit between the lamp plate 1 and the back plate 2. Two elastic buckles 32 can be symmetrically arranged to form a V-shaped structure. Optionally, two outwardly extending ears can be provided on the outer edge of the V-shaped structure opening. A limiting groove can be provided at the bottom of the back plate 2. After the V-shaped structure is squeezed to deform it, it is easy to insert into the inside of the card insertion hole 21. After passing through the card insertion hole 21, the buckle will automatically spring back to the initial width. At this time, the two extending ears will abut against the limiting groove respectively, thereby preventing the elastic buckle 32 from being over-displaced.

[0032] In the embodiments of this utility model, please refer to Figure 4 The elastic snap fastener 32 includes a fixed section 321 and a guide section 322 connected to each other. The guide section 322 extends axially along the fixed section 321, and its outer diameter gradually decreases from the end near the fixed section 321 to the end away from the fixed section 321. That is, the outer diameter of the guide section 322 gradually decreases axially, forming a tapered guide surface. During the insertion of the elastic snap fastener 32, it automatically corrects alignment deviations, reducing assembly resistance, and is especially suitable for blind insertion or automated production line scenarios. The fixed section 321 can be a cylindrical stainless steel part, and an annular groove can be provided on the surface of the fixed section 321. An annular protrusion can be provided on the wall of the pre-set through hole on the lamp plate 1. The interference fit with the lamp plate 1 is achieved through the cooperation of the groove and the protrusion. The guide section 322 can be frustoconical and integrally formed with the fixed section 321, simplifying the production process. During specific assembly, the guide section 322 is aligned with the snap hole on the back plate 2 and pressed down. The tapered surface of the guide section 322 will guide the elastic snap fastener 32 to automatically center and insert. Furthermore, the gradually changing outer diameter of the guide section 322 reduces friction generated during insertion and removal.

[0033] In the embodiments of this utility model, please refer to Figure 4 The outer diameter of the guide section 322 near the fixed section 321 is larger than that of the fixed section 321, thus forming a stepped limiting surface at the connection between the guide section 322 and the fixed section 321. After insertion, the stepped surface will contact the surface of the back plate 2 away from the lamp plate 1. The stepped surface and the locking hole form a mechanical stop, generating a reverse self-locking effect under vibration or tension, preventing the guide section 322 from disengaging from the locking hole and improving the connection strength between the back plate 2 and the lamp plate 1.

[0034] In embodiments of this utility model, the elastic snap-fit ​​part is configured as an elastic slot or an elastic plug (not shown in the figure), and the back plate 2 is provided with a connector that mates with the elastic slot or a slot that mates with the elastic plug. In this embodiment, the elastic snap-fit ​​part can be an elastic slot or an elastic plug, and correspondingly, the back plate 2 is provided with a connector or slot that mates with it. Through the cooperation of the connector and the slot, it is easier to fix the back plate 2 and the locking structure 3. Furthermore, the elastic slot and the elastic plug can generate a continuous clamping force through deformation during the insertion process, avoiding structural damage caused by hard collisions. The elastic slot can be a U-shaped groove, and the back plate 2 is provided with a protrusion that matches the shape of the U-shaped groove. By inserting the protrusion into the U-shaped groove, the abutment section 31 abuts against the lamp plate 1, thereby fixing and locking the back plate 2 and the lamp plate 1.

[0035] In the embodiments of this utility model, please refer to Figure 4 The abutting section 31 and the elastic snap-fit ​​part are integrally formed, for example, by injection molding or stamping. This can eliminate the weak connection area of ​​the traditional split structure, significantly improve the integrity of the locking structure 3, and make the abutting section 31 and the elastic snap-fit ​​part as a single part, without the need for secondary assembly, thus completely eliminating the problem of mismatch or omission of parts.

[0036] In the embodiments of this utility model, please refer to Figure 4 The outer diameter of the abutment section 31 increases towards the elastic locking portion, meaning the outer diameter of the end of the abutment section 31 furthest from the elastic locking portion is smaller. This reduces the impact of pressure peaks when assembling the abutment section 31 in the locking structure 3 with other optical films in the backlight module 100, preventing micro-cracks or warping deformation of the backplate 2 and lamp plate 1 due to pressure concentration. Optionally, a rounded corner can be provided at the end of the abutment section 31 with the smallest outer diameter to eliminate the risk of scratches to the optical films from sharp edges. In other words, the elastic locking portion in the locking structure 3 can fix the lamp plate 1 and backplate 2, and the abutment section 31 in the locking structure 3 can also provide support. Thus, the locking structure 3 integrates both support and fixation functions, further reducing the number of components used in the backlight module 100.

[0037] In an embodiment of this utility model, a friction-enhancing structure 311 is provided on the abutment section 31. The friction-enhancing structure 311 is disposed on the outer peripheral surface of the abutment section 31, and the friction-enhancing structure 311 can increase the friction coefficient between the abutment section 31 and the contact surface of the lamp plate 1. Please refer to... Figure 5The friction-enhancing structure 311 can be a frosted coating, which is applied to the outer peripheral surface of the contact section 31. For example, silicon carbide or aluminum oxide particle coatings can be sprayed onto all or part of the outer peripheral surface of the contact section 31. In this way, the frosted particles can fill the microscopic uneven areas on the upper surface of the lamp panel 1 through elastic deformation, thereby increasing the contact area and improving the connection force between the lamp panel 1 and the contact section 31.

[0038] In other embodiments, please refer to Figure 6 The friction-enhancing structure 311 can also be configured as recesses or protrusions, and the recesses or protrusions are arranged in a dot matrix. For example, the recesses can be knurled grooves, and the area inside the recesses can accommodate tiny particles to prevent the accumulation of contaminants from causing a decrease in friction performance. The protrusions can be hemispherical protrusions in a dot matrix structure. This dot matrix structure can distribute the concentrated load to multiple contact points. During assembly, the protrusions of the pressing and abutting section 31 can be embedded into the surface of the lamp plate 1, and the protrusions and the lamp plate 1 form a multi-point engagement, thereby improving the multi-level locking between the two.

[0039] This utility model also proposes a display device, which includes a backlight module 100 described in any of the above embodiments. The specific structure of the backlight module 100 is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0040] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection 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 scope of protection of the present utility model.

Claims

1. A backlight module, characterized in that, The backlight module includes: Light panel; A backplate, disposed on one side of the light panel; and A locking structure includes a connecting abutment section and an elastic snap-fit ​​part, the elastic snap-fit ​​part passing through the lamp panel and snapping with the back plate, and the abutment section abutting against the surface of the lamp panel facing away from the back plate.

2. The backlight module of claim 1, wherein, The elastic snap-fit ​​portion includes at least two elastic snaps arranged opposite each other, the two elastic snaps being spaced apart to form a deformation space, the back plate having a snap-fit ​​through hole, the two elastic snaps being brought close together and pressed against each other to extend into the snap-fit ​​through hole, and the elastic snaps being pressed against the hole wall of the snap-fit ​​through hole by the rebound force of the elastic snaps.

3. The backlight module of claim 2, wherein, The elastic buckle includes a fixed section and a guide section connected to each other. The guide section extends axially along the fixed section, and the outer diameter of the guide section gradually decreases from one end near the fixed section to the other end away from the fixed section.

4. The backlight module of claim 3, wherein, The outer diameter of the guide segment near the fixed segment is larger than the outer diameter of the fixed segment.

5. The backlight module of claim 1, wherein, The resilient snap-fit ​​portion is configured as a resilient slot or a resilient plug, and the back plate is provided with a plug that mates with the resilient slot or a plug groove that mates with the resilient plug.

6. The backlight module of claim 1, wherein, The abutting section and the elastic locking portion are integrally formed; and / or, the outer diameter of the abutting section increases in the direction approaching the elastic locking portion.

7. The backlight module of claim 1, wherein, The abutting section is provided with a friction-enhancing structure, which is located on the outer peripheral surface of the abutting section.

8. The backlight module of claim 7, wherein, The friction-enhancing structure is configured as a frosted coating, which is applied to the outer peripheral surface of the abutment section.

9. The backlight module as described in claim 7, characterized in that, The friction-enhancing structure is configured as recesses or protrusions, and the recesses or protrusions are arranged in a lattice pattern.

10. A display device, characterized in that, The display device includes a backlight module as described in any one of claims 1 to 9.

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