Backlight module and display device

Abstract

The utility model discloses a backlight module and discloses a display device with the backlight module. The backlight module comprises a base, a light guide plate and a light guide plate, the lamp strip is fixed to the base, a plurality of lamp beads are arranged on the lamp strip, and the lamp beads are arranged at intervals in the extending direction of the lamp strip; the reflector plate is provided with a plurality of avoiding holes, the positions of the avoiding holes are matched with the positions of the lamp beads, the avoiding holes are suitable for installing the lamp beads, the avoiding holes are provided with a plurality of protruding parts, when the reflector plate is fixed to the base, the lamp beads are installed in the avoiding holes in an embedded mode, and the protruding parts are connected to the bottoms of the lamp beads in a clamped mode. The interference shadow can be effectively eliminated, and the optical flaw processing cost is reduced.

Description

Technical Field

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

[0002] In the prior art, backlight LED lamp beads are usually fixed on the light bar on the base and arranged at intervals along the light bar. Avoidance holes that match the positions of the lamp beads are opened on the reflective sheet to facilitate the passage of the lamp beads. However, in actual applications, due to the imperfect connection between the lamp beads and the reflective sheet, the reflective sheet around the lamp beads often bulges or warps locally, which not only affects the flatness of the reflective sheet surface and causes uneven light reflection, but also forms obvious interference shadows on the screen, seriously affecting the display quality of the LCD TV.

[0003] To alleviate this problem, a common solution on the market is to add auxiliary materials such as 3M double-sided tape around the lamp beads, and fix the reflective sheet around the backlight lamp beads as tightly as possible by pasting, so as to reduce the bulging of the reflective sheet. However, this method has obvious disadvantages: on the one hand, relying on additional pasting materials increases production costs, especially in large-scale industrial production, the accumulation of material costs cannot be ignored; on the other hand, the pasting operation process is cumbersome and requires high skills of workers, which affects production efficiency and is not conducive to improving product market competitiveness. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a backlight module that can effectively eliminate interference shadows and reduce the cost of optical defect processing.

[0005] The utility model also provides a display device having the above-mentioned backlight module.

[0006] According to a first aspect of the present invention, a backlight module includes: a base;

[0007] A light bar, fixed to the base, on which a plurality of lamp beads are arranged, and the lamp beads are arranged at intervals along the direction in which the light bar extends;

[0008] The reflective sheet is provided with a plurality of avoidance holes, the positions of the avoidance holes are adapted to the positions of the lamp beads, the avoidance holes are suitable for installing the lamp beads, the avoidance holes are provided with a plurality of protrusions, when the reflective sheet is fixed to the base, the lamp beads are embedded in the avoidance holes, and the protrusions are clamped on the bottom of the lamp beads.

[0009] A backlight module according to an embodiment of the utility model has at least the following beneficial effects: the avoidance hole on the reflective sheet and the lamp bead are adapted to each other to ensure that the lamp bead can be accurately installed in the avoidance hole, and the protrusion of the avoidance hole can be snapped onto the bottom of the lamp bead when the reflective sheet is fixed to the base to form a lock, thereby ensuring the stability and reliability of the connection between the lamp bead and the reflective sheet, thereby improving the flatness of the surface of the reflective sheet after installation, which is beneficial to the reflection and diffusion of light, thereby improving the lighting effect and visual experience of the backlight module; when installing the reflective sheet, it is only necessary to snap the protrusion onto the bottom of the lamp bead to avoid the bulging of the reflective sheet, without the need to use additional fixing materials and complex bonding processes, thereby further improving production efficiency, reducing the risk of manual operation errors, and ensuring product consistency and quality stability; the backlight module adopting this design can achieve precise positioning and firm connection between the lamp bead and the reflective sheet, simplify the manufacturing process and reduce costs.

[0010] According to some embodiments of the utility model, the avoidance hole is square, and the shape of the avoidance hole matches the lamp bead. The design of the square avoidance hole minimizes the gap between the lamp bead and the reflector, so that the light can be captured more effectively by the reflector, reducing the waste of light energy.

[0011] According to some embodiments of the utility model, the number of the protrusions is two, the two protrusions are arranged opposite to each other, and the two protrusions are arranged symmetrically to each other. The two protrusions not only increase the contact area and disperse the stress, but also prevent the displacement or loosening between the lamp bead and the protrusions caused by factors such as vibration.

[0012] According to some embodiments of the utility model, the number of the protrusions is four, and the four protrusions are arranged at intervals along the outer diameter of the avoidance hole. The stress can be further dispersed, and the four protrusions arranged at intervals can effectively prevent the lamp bead from tilting or deflecting, ensuring that it always maintains an ideal positioning state.

[0013] According to some embodiments of the utility model, the protrusion is triangular or trapezoidal, and the width of the protrusion gradually decreases from the end connected to the reflector to the free end. The gradually narrowing free end can facilitate the protrusion to be installed at the bottom of the lamp bead.

[0014] According to some embodiments of the utility model, the plane where the reflector sheet is located after being installed in place is kept flush with the end surface of the bottom of the lamp bead, ensuring the continuity and flatness of the reflector sheet surface, so that the light emitted from the lamp bead can be evenly and smoothly reflected on the reflector sheet surface without light scattering or blocking caused by protrusions or depressions.

[0015] According to some embodiments of the utility model, the lamp bead is connected to the avoidance hole by interference fit, and the size of the lamp bead is larger than the avoidance hole. The installation can be completed by simply pressing the protrusion into the bottom of the lamp bead, which is simple to install.

[0016] According to some embodiments of the present invention, the reflective sheet and the protruding portion are integrally formed. The integrally formed reflective sheet and protruding portion can increase the mechanical strength of the connection portion and improve the ability of the backlight module to resist external impact.

[0017] According to some embodiments of the utility model, the shell of the base is arc-shaped, and a heat dissipation gap is provided between the base and the reflector, forming an effective air circulation channel, which helps to quickly dissipate the heat generated by the lamp beads when working to the surrounding environment, thereby reducing the working temperature of the backlight module.

[0018] A display device according to an embodiment of the second aspect of the utility model includes the backlight module of the embodiment of the first aspect.

[0019] The display device according to the embodiment of the utility model has at least the following beneficial effects: the display device using the backlight module has excellent optical performance and can present a clear and delicate display effect; because the various components of the backlight module are stably connected, the display device has a stronger anti-interference ability when facing external environments such as impact and has a longer service life.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is an exploded schematic diagram of a backlight module according to an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of a backlight module according to an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of a reflective sheet according to an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0026] Reference numerals: base 100 ; reflector 110 ; light bar 120 ; light bead 130 ; avoidance hole 140 ; ​​protrusion 150 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 4 , a backlight module, comprising: a base 100;

[0032] The light bar 120 is fixed to the base 100. A plurality of lamp beads 130 are arranged on the light bar 120. The lamp beads 130 are arranged at intervals along the direction in which the light bar 120 extends.

[0033] The reflective sheet 110 is provided with a plurality of avoidance holes 140. The positions of the avoidance holes 140 are adapted to the positions of the lamp beads 130. The avoidance holes 140 are suitable for installing the lamp beads 130. The avoidance holes 140 are provided with a plurality of protrusions 150. When the reflective sheet 110 is fixed to the base 100, the lamp beads 130 are embedded in the avoidance holes 140, and the protrusions 150 are clamped on the bottom of the lamp beads 130.

[0034] The avoidance hole 140 on the reflector 110 is adapted to the lamp bead 130 to ensure that the lamp bead 130 can be accurately installed in the avoidance hole 140. When the reflector 110 is fixed to the base 100, the protrusion 150 of the avoidance hole 140 can be snapped onto the bottom of the lamp bead 130 to form a lock, thereby ensuring the stability and reliability of the connection between the lamp bead 130 and the reflector 110, thereby improving the flatness of the surface of the reflector 110 after installation, which is beneficial to the reflection and diffusion of light, thereby improving the lighting effect and visual experience of the backlight module; when installing the reflector 110, it is only necessary to snap the protrusion 150 onto the bottom of the lamp bead 130 to avoid the bulging of the reflector 110, without the need to use additional fixing materials and complex bonding processes, further improving production efficiency, reducing the risk of manual operation errors, and ensuring product consistency and quality stability; the backlight module using this design can achieve precise positioning and firm connection between the lamp bead 130 and the reflector 110, simplifying the manufacturing process and reducing costs.

[0035] Reference Figure 3 and Figure 4 The avoidance hole 140 is square, and the shape of the avoidance hole 140 matches the lamp bead 130. The design of the square avoidance hole 140 minimizes the gap between the lamp bead 130 and the reflector 110, so that light can be more effectively captured by the reflector 110, reducing the waste of light energy.

[0036] There are two protrusions 150, which are arranged opposite to each other and symmetrically to each other. The two protrusions 150 not only increase the contact area and disperse the stress, but also prevent the displacement or loosening between the lamp bead 130 and the protrusions 150 due to factors such as vibration. It can be understood that the number and shape of the protrusions 150 can be adapted accordingly according to the model of the lamp bead 130. In some preferred embodiments, the number of the protrusions 150 is four, and the four protrusions 150 are arranged circumferentially along the outer diameter of the avoidance hole 140. The stress can be further dispersed, and the four circumferentially spaced protrusions 150 can effectively prevent the lamp bead 130 from tilting or deflecting, ensuring that it always maintains an ideal positioning state.

[0037] The protrusion 150 is triangular or trapezoidal, and the width of the protrusion 150 gradually decreases from the end connected to the reflector 110 to the free end. The gradually narrowing free end can facilitate the protrusion 150 to be installed at the bottom of the lamp bead 130.

[0038] Reference Figure 1 and Figure 2The plane where the reflector sheet 110 is located after being installed is flush with the end surface of the bottom of the lamp bead 130. The continuity and flatness of the surface of the reflector sheet 110 are ensured, so that the light emitted from the lamp bead 130 can be evenly and smoothly reflected on the surface of the reflector sheet 110 without light scattering or blocking caused by protrusions or depressions.

[0039] The lamp bead 130 is connected to the avoidance hole 140 by interference fit, and the size of the lamp bead 130 is larger than the avoidance hole 140. The installation can be completed by simply pressing the protrusion 150 into the bottom of the lamp bead 130, and the installation is simple.

[0040] The reflective sheet 110 and the protrusion 150 are integrally formed. The integrally formed reflective sheet 110 and protrusion 150 can increase the mechanical strength of the connection part and improve the ability of the backlight module to resist external impact. The reflective sheet 110 and the protrusion 150 are manufactured by an integral molding process, that is, the protrusion 150 is directly integrally formed on the reflective sheet 110 by stamping, rather than being connected to the reflective sheet 110 by subsequent bonding, welding, etc. This design ensures a seamless transition between the reflective sheet 110 and the protrusion 150, without additional connection surfaces, thereby ensuring the integrity of the overall structure. It can improve mechanical strength, simplify the process, reduce production costs, and improve optical performance and display effects.

[0041] The housing of the base 100 is arc-shaped, and a heat dissipation gap is provided between the base 100 and the reflector 110. An effective air circulation channel is formed, which helps to quickly dissipate the heat generated by the lamp beads 130 when working to the surrounding environment, thereby reducing the working temperature of the backlight module.

[0042] Reference Figures 1 to 4 In this embodiment, the base 100 adopts an arc-shaped design and is made of a metal material with good thermal conductivity. Its arc shape is conducive to the diffusion of heat from the bottom to the surroundings, thereby improving the heat dissipation efficiency. The reflective sheet 110 covers the top of the base 100, and forms a heat dissipation gap of a certain distance between the reflective sheet 110 and the base 100, so as to facilitate air circulation and accelerate heat dissipation. The reflective sheet 110 is provided with a plurality of avoidance holes 140, and the avoidance holes 140 are provided with protrusions 150, and each avoidance hole 140 corresponds to a position of a lamp bead 130. The design of the protrusion 150 is intended to eliminate the problem of interference shadows caused by the bulging of the reflective sheet 110 around the lamp bead 130, which helps to reduce light loss and improve light utilization. The lamp bead 130 is embedded in the avoidance hole 140 of the reflective sheet 110 by interference fit, ensuring that the lamp bead 130 fits tightly with the reflective sheet 110, reducing light leakage and improving luminous efficiency. The size of the avoidance hole 140 is slightly smaller than the diameter of the lamp bead 130 , and the elasticity of the material is used to make the lamp bead 130 in close contact with the hole wall, which not only ensures a good fixing effect, but also facilitates the installation and removal of the lamp bead 130 .

[0043] The display device of the second embodiment of the utility model includes the backlight module of the first embodiment. The display device using the backlight module has excellent optical performance and can present a clear and delicate display effect; because the various components of the backlight module are stably connected, the display device has stronger anti-interference ability and longer service life when facing external environments such as impact. The backlight module of embodiment 1 is installed inside the display device to ensure that it is accurately aligned with the display panel, and is connected to the driving circuit through a connector or a flexible circuit board to control the switch and brightness adjustment of the lamp bead 130, which can improve the display performance of the display device and make full use of the space inside the display device, thereby reducing the thickness and achieving lightness and thinness.

[0044] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A backlight module, characterized in that: include: Base; A light bar, fixed to the base, on which a plurality of lamp beads are arranged, and the lamp beads are arranged at intervals along the direction in which the light bar extends; The reflective sheet is provided with a plurality of avoidance holes, the positions of the avoidance holes are adapted to the positions of the lamp beads, the avoidance holes are suitable for installing the lamp beads, the avoidance holes are provided with a plurality of protrusions, when the reflective sheet is fixed to the base, the lamp beads are embedded in the avoidance holes, and the protrusions are clamped on the bottom of the lamp beads.

2. The backlight module according to claim 1, characterized in that: The avoidance hole is square, and the shape of the avoidance hole matches the lamp bead.

3. The backlight module according to claim 2, characterized in that: The number of the protrusions is two, the two protrusions are arranged opposite to each other, and the two protrusions are arranged symmetrically to each other.

4. The backlight module according to claim 2, characterized in that: The number of the protrusions is four, and the four protrusions are arranged at intervals along the outer diameter of the avoidance hole.

5. The backlight module according to claim 1, characterized in that: The protrusion is in a triangular or trapezoidal shape, and the width of the protrusion gradually decreases from the end connected to the reflective sheet to the free end.

6. The backlight module according to claim 1, characterized in that: The plane where the reflector sheet is located after being installed in place is kept flush with the end surface of the bottom of the lamp bead.

7. The backlight module according to claim 1, characterized in that: The lamp bead is connected to the avoidance hole through interference fit, and the size of the lamp bead is larger than the avoidance hole.

8. The backlight module according to claim 1, characterized in that: The reflective sheet and the protruding portion are integrally formed.

9. The backlight module according to claim 1, characterized in that: The shell of the base is arc-shaped, and a heat dissipation gap is arranged between the base and the reflector.

10. A display device, characterized in that: A backlight module comprising any one of claims 1 to 9.

Images