LED lamp panel, module and display screen

Abstract

The utility model discloses a LED lamp panel, module and display screen, wherein, LED lamp panel includes: substrate, shield shell and a plurality of lamp pearl, the substrate has the first mounting surface and second mounting surface of opposite setting, a plurality of lamp pearl interval is established in the first mounting surface, the first mounting surface is equipped with the electromagnetic shielding layer of mesh structure, the electromagnetic shielding layer covers the first mounting surface setting to make a plurality of lamp pearl's light through the mesh structure and send out, the second mounting surface is used to install driver, the shield shell is located the second mounting surface for shielding the electromagnetic radiation of driver. The utility model discloses through setting the mesh shape electromagnetic shielding layer on the substrate surface and setting the shield shell on the back of substrate, guaranteeing the light demand of LED module, while, maximum limit inhibiting electromagnetic radiation leakage.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic radiation shielding technology, and in particular to an LED light board, module and display screen. Background Technology

[0002] With the development of LED display technology, the application of LED modules is becoming increasingly widespread. LED modules generate electromagnetic radiation during operation, which may interfere with the normal operation of surrounding precision electronic equipment. Therefore, effective electromagnetic shielding of the modules is necessary. Existing electromagnetic shielding methods mainly achieve this through the use of metal shielding covers or transparent conductive films. However, while metal shielding covers can effectively shield electromagnetic radiation, they also block light, thus obstructing the LED light source. Transparent films, although maintaining high light transmittance, have insufficient high-frequency shielding effectiveness and cannot adequately shield electromagnetic radiation. Utility Model Content

[0003] The main purpose of this invention is to provide an LED light panel to solve the problem that existing LED modules cannot simultaneously meet the requirements of high-frequency electromagnetic radiation shielding effectiveness and high visible light transmittance.

[0004] To achieve the above objectives, this utility model proposes an LED light panel, comprising: a substrate, a shielding shell, and a plurality of LED beads. The substrate has a first mounting surface and a second mounting surface arranged back-to-back. The plurality of LED beads are spaced apart on the first mounting surface. The first mounting surface is provided with an electromagnetic shielding layer with a mesh structure. The electromagnetic shielding layer covers the first mounting surface so that the plurality of LED beads emit light through the mesh structure. The second mounting surface is used to mount driving devices, and the shielding shell is disposed on the second mounting surface to shield the electromagnetic radiation of the driving devices.

[0005] Optionally, the electromagnetic shielding layer forms multiple display areas, which are spaced apart, and each display area has the mesh structure.

[0006] Optionally, the electromagnetic shielding layer includes a conductive layer and a magnetically conductive layer, which are stacked on the first mounting surface to form the mesh structure.

[0007] Optionally, the conductive layer covers the first mounting surface, and the magnetic layer covers the conductive layer.

[0008] Optionally, the conductive layer is a silver metal layer or a copper metal layer; and / or, the magnetically conductive layer is a nickel metal layer.

[0009] Optionally, the thickness of the conductive layer is 20 μm to 25 μm; and / or, the thickness of the magnetically conductive layer is 15 μm to 20 μm.

[0010] Optionally, a conductive gasket is provided between the shielding shell and the substrate, the conductive gasket being used to seal the gap between the substrate and the shielding shell.

[0011] Optionally, the surface of the electromagnetic shielding layer is provided with a functional film.

[0012] This utility model also proposes an LED module, including a driving device and the aforementioned LED light board, wherein the driving device is mounted on the second mounting surface of the LED light board.

[0013] This utility model also proposes a display screen, including a housing and the aforementioned LED module, wherein the LED module is disposed in the housing.

[0014] In this invention, the LED light board includes a substrate, a shielding shell, and a plurality of LED beads. The substrate has a first mounting surface and a second mounting surface facing each other. The plurality of LED beads are spaced apart on the first mounting surface. The first mounting surface is covered with an electromagnetic shielding layer with a mesh structure, allowing the light from the LED beads to be emitted through the mesh structure. The second mounting surface is used to mount driving devices, and the shielding shell is disposed on the second mounting surface to shield the electromagnetic radiation of the driving devices. This invention, by setting a mesh-like electromagnetic shielding layer on the surface of the substrate and setting a shielding shell on the back of the substrate, ensures the light output requirements of the LED module while minimizing electromagnetic radiation leakage. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the LED light board in one embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the LED light panel;

[0018] Figure 3 This is a schematic diagram of a square mesh structure in one embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of a circular mesh structure in another embodiment of the present invention.

[0020] Explanation of icon numbers:

[0021] name label name label LED light panel 100 Electromagnetic shielding layer 40 substrate 10 Display area 40a First mounting surface 10a conductive layer 41 Second mounting surface 10b Magnetic layer 42 Shielding shell 20 Functional membrane 50 LED beads 30 Encapsulation layer 60

[0022] 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

[0023] 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 protection scope of the present utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] See Figures 1 to 4 In one embodiment of this utility model, an LED light board 100 includes a substrate 10, a shielding shell 20, and a plurality of LED beads 30. The substrate 10 has a first mounting surface 10a and a second mounting surface 10b arranged opposite to each other. The plurality of LED beads 30 are spaced apart on the first mounting surface 10a. The first mounting surface 10a is provided with an electromagnetic shielding layer 40 with a mesh structure. The electromagnetic shielding layer 40 covers the first mounting surface 10a so that the plurality of LED beads 30 emit light through the mesh structure. The second mounting surface 10b is used to mount driving devices. The shielding shell 20 is disposed on the second mounting surface 10b and is used to shield the electromagnetic radiation of the driving devices.

[0026] In this invention, the LED light board 100 includes a substrate 10, a shielding shell 20, and a plurality of LED beads 30. The substrate 10 has a first mounting surface 10a and a second mounting surface 10b arranged opposite each other. The plurality of LED beads 30 are spaced apart on the first mounting surface 10a. The first mounting surface 10a is covered with a mesh-structured electromagnetic shielding layer 40, so that the light from the plurality of LED beads 30 is emitted through the mesh structure. The second mounting surface 10b is used to mount driving devices, and the shielding shell 20 is disposed on the second mounting surface 10b of the substrate 10 to shield the electromagnetic radiation of the driving devices. This invention, by providing a mesh-shaped electromagnetic shielding layer 40 on the surface of the substrate 10 and a shielding shell 20 on the back of the substrate 10, ensures the light output requirements of the LED module while minimizing electromagnetic radiation leakage.

[0027] Specifically, in this embodiment, the substrate 10 is a PCB board, on which a driving circuit, connection circuit, solder pads, etc., are provided. The LED bead 30 is fixed to the substrate 10 by molding with a two-component transparent epoxy molding compound. After initial curing at 130°C for 5 minutes in an oven, and then full curing at 130°C for 180 minutes, an encapsulation layer 60 is finally formed on the surface of the first mounting surface 10a, making the LED bead 30 and the substrate 10 a whole. Preferably, the height of the encapsulation layer 60 is 50-100 μm higher than the height of the LED bead 30. The electromagnetic shielding layer 40 is coated on the surface of the encapsulation layer 60 and... The four sides of the substrate 10 are shielded to block electromagnetic radiation emitted from the front and sides of the LED light panel 100. After coating, holes are made in the electromagnetic shielding layer 40 by laser cutting to form a mesh structure. The light emitted by the LED beads 30 passes through the mesh. It should be noted that in this embodiment, the mesh is arranged in an equally spaced array on the electromagnetic shielding layer 40. Alternatively, the mesh can be distributed randomly at different intervals on the electromagnetic shielding layer 40, as long as the light of the LED beads 30 can be emitted from the mesh. This embodiment is not limited to this. All of the above are within the protection scope of this utility model. The shielding shell 20 is disposed on the second mounting surface 10b. Since the driving device (not shown in the figure) mounted on the second mounting surface 10b also emits electromagnetic radiation, the shielding shell 20, together with the electromagnetic shielding layer 40, can achieve all-round shielding of the electromagnetic radiation of the LED light panel 100. It should be noted that the shielding shell 20 in this embodiment is a copper metal shell. Copper is a highly conductive material, and the electromagnetic radiation emitted by the driving device will be reflected and eliminated by the shielding shell 20. Of course, the shielding shell 20 can also be made of highly conductive metals such as aluminum, or a plastic shell with conductive paint sprayed or conductive material filled inside, as long as radiation shielding can be achieved. This embodiment is not limited to these. All of the above are based on this embodiment. Within the scope of protection of this utility model; it should be noted that, due to processing errors and other reasons, there may be tiny gaps between the substrate 10 and the shielding shell 20, and electromagnetic radiation may leak from the gaps. Therefore, in order to ensure the electrical continuity and overall shielding performance of the LED light board 100, the substrate 10 and the shielding shell 20 in this embodiment are preferably sealed together. This can be achieved by setting conductive gaskets, metal springs, conductive tapes, etc. at the joint between the substrate 10 and the shielding shell 20, or by forming a metal fusion zone at the joint between the substrate 10 and the shielding shell 20 through a welding process to achieve a sealed connection between the two. This embodiment is not limited to this, and all of the above are within the scope of protection of this utility model.

[0028] See Figures 1 to 4Furthermore, in one embodiment of this utility model, the electromagnetic shielding layer 40 forms a plurality of display areas 40a, which are spaced apart, and each display area 40a has a mesh structure. It should be noted that in this embodiment, the LED bead 30 is located at the center of the display area 40a. A micro-hole array structure is formed on the electromagnetic shielding layer 40 through a secondary array, maximizing the shielding of electromagnetic radiation without affecting the light emission of the LED bead 30; for example, as... Figure 3 As shown, in one specific embodiment, a first array is first performed on the electromagnetic shielding layer 40 to divide it into multiple square display areas 40a with a side length L1 = 1.05 mm, and the interval between two adjacent square display areas 40a is L2 = 0.1 mm. Then, a second array is performed in each square display area 40a to create multiple square meshes with a side length L3 = 0.2 mm, and the interval between two adjacent rectangular meshes is L4 = 0.05 mm. Figure 4 As shown, in another specific embodiment, a first array is first performed on the electromagnetic shielding layer 40 to divide it into multiple square display areas 40a. Then, a second array is performed on each square display area 40a to create multiple circular mesh holes. Each square display area 40a consists of 15*15 arrayed circular holes with a diameter D = 0.05 mm and a center distance L5 = 0.05 mm between two adjacent circular holes. Of course, the mesh holes can also be set as one of triangles, rectangles, hexagons, irregular shapes, or combinations thereof. The spacing between adjacent display areas 40a and the spacing between the mesh holes are determined according to the actual situation. This embodiment is not limited to this, and all of the above are within the protection scope of this utility model.

[0029] See Figures 1 to 4 Furthermore, in one embodiment of this utility model, the electromagnetic shielding layer 40 includes a conductive layer 41 and a magnetically conductive layer 42, which are stacked on the first mounting surface 10a to form a mesh structure. It should be noted that since the LED light panel 100 typically emits high-frequency and low-frequency radiation interference, this embodiment uses a composite metal layer for shielding. The conductive layer 41 shields high-frequency radiation, and the magnetically conductive layer 42 shields low-frequency radiation. The conductive layer 41 can be composed of highly conductive materials such as silver or copper, and the magnetically conductive layer 42 can be composed of highly permeable materials such as nickel or ferrite. This embodiment is not limited to these methods, and all are within the protection scope of this utility model. By setting the electromagnetic shielding layer 40 composed of a composite metal, the complementary physical characteristics of the two materials are utilized to achieve synergistic and efficient suppression of radiation ranging from low-frequency strong magnetic fields to high-frequency radio frequency radiation, thereby improving the radiation shielding effectiveness of the LED light panel 100.

[0030] See Figures 1 to 4Furthermore, in one embodiment of this utility model, the conductive layer 41 covers the first mounting surface 10a, and the magnetically conductive layer 42 covers the conductive layer 41. Specifically, in this embodiment, after the lamp bead 30 is cured, a highly conductive material is sprayed onto the surface of the encapsulation layer 60 and the side of the substrate 10 to form the conductive layer 41. The conductive layer 41 is then baked in an oven at 60°C or 75°C for 30 minutes until it is completely cured. Then, a highly permeable material is sprayed onto the surface and side of the cured conductive layer 41 to form the magnetically conductive layer 42. The magnetically conductive layer 42 is then baked in an oven at 55°C or 60°C for 90 minutes until it is completely cured. Thus, by setting a structure with the conductive layer 41 inside and the magnetic permeable layer 42 outside, the high conductivity material has excellent conductivity and electromagnetic induction characteristics, which can effectively reflect most of the high-frequency electromagnetic interference in the first instance and prevent it from radiating outward. The high magnetic permeability material can change the path of the magnetic field and guide the magnetic field to generate eddy current effect, so that the residual low-frequency strong magnetic field penetrating the conductive layer 41 can be absorbed by the magnetic permeable layer 42, reducing the external magnetic field. Therefore, this embodiment achieves shielding by converting electromagnetic waves into current through a small amount of reflection, and most of the skin effect and eddy current effect.

[0031] See Figures 1 to 4 Furthermore, in one embodiment of this utility model, the conductive layer 41 is a silver metal layer or a copper metal layer; and / or, the magnetically conductive layer 42 is a nickel metal layer. It should be noted that the conductive layer 41 in this embodiment is a silver metal layer or a copper metal layer, preferably a silver metal layer. Silver is a highly efficient shielding material with a small skin depth, providing excellent conductive continuity, making it suitable for high-frequency radiation shielding. Moreover, silver is not easily oxidized at room temperature, avoiding long-term use where oxidation leads to a decrease in shielding effectiveness. The magnetically conductive layer 42 is preferably nickel metal. Nickel is a ferromagnetic metal with high permeability and anti-saturation capability, resulting in better performance in low-frequency magnetic field shielding. The conductive layer 41 can also be made of other highly conductive materials, such as aluminum metal, conductive polymers, etc.; the magnetically conductive layer 42 can also be made of iron-nickel alloys, ferrites, and other magnetic materials. This embodiment is not limited to these, and all of the above are within the protection scope of this utility model.

[0032] See Figures 1 to 4Furthermore, in one embodiment of this invention, the thickness of the conductive layer 41 is 20μm to 25μm; and / or, the thickness of the magnetic layer 42 is 15μm to 20μm. It should be noted that the thickness of the conductive layer 41 in this embodiment is set to 20μm to 25μm, which is greater than the skin depth of common interference frequencies. This ensures sufficient thickness at the highest target shielding frequency, avoiding a decrease in shielding effectiveness due to increased surface resistance caused by insufficient thickness. Simultaneously, it effectively controls production costs while ensuring performance. The thickness of the magnetic layer 42 is set to 15μm to 20μm. Since the magnetic layer 42 attenuates low-frequency magnetic field interference through absorption and magnetic bypass, the low-frequency magnetic field shielding effectiveness depends on the permeability and thickness of the material. Therefore, an appropriate thickness can provide sufficient magnetic flux paths and ensure that the magnetic layer 42 does not reach saturation under the expected maximum interference magnetic field strength, maintaining effective magnetic shielding capability. At the same time, limiting the thickness can control production costs while meeting the low-frequency magnetic field shielding requirements and anti-saturation capability.

[0033] See Figures 1 to 4 Furthermore, in one embodiment of this utility model, a conductive gasket is provided between the shielding shell 20 and the substrate 10. The conductive gasket is used to seal the gap between the substrate 10 and the shielding shell 20. It should be noted that in this embodiment, the conductive gasket fills the tiny gaps between the metal shell and the substrate 10 caused by processing tolerances, etc. The conductive gasket can be a conductive silicone rubber gasket, which automatically fills the gaps through the compression deformation of the elastic material. It can also be one or more of conductive foam gaskets, woven metal mesh gaskets, and metal-coated rubber gaskets, and this embodiment is not limited to these. All of the above are within the protection scope of this utility model. This embodiment ensures the electrical continuity between the shielding shell 20 and the substrate 10 by setting a conductive gasket, preventing electromagnetic radiation from leaking through gaps and compromising the overall shielding effectiveness. At the same time, it can also block water vapor penetration, meeting the sealing and waterproof requirements of the LED light board 100.

[0034] See Figures 1 to 4Furthermore, in one embodiment of this invention, a functional film 50 is provided on the surface of the electromagnetic shielding layer 40. It should be noted that the LED light panel 100 in this embodiment has a black functional film 50 on its surface. The functional film 50 is bonded to the surface of the electromagnetic shielding layer 40 using a rolling device, and its thickness is preferably 50 μm. The functional film 50 includes a service layer and a protective layer stacked together. The protective layer includes a PET layer, which has high wear resistance. Using it as the outermost layer allows the LED light panel 100 to effectively resist scratches, friction, and impacts, improving the service life of the LED light panel 100. The service layer includes an AG layer, which has anti-glare properties, enabling the LED light panel 100 to eliminate glare and maintain light source clarity in strong light environments. This embodiment protects the LED light panel 100 by providing a black functional film 50, while maintaining a consistent blackness on the surface of the LED light panel 100.

[0035] This embodiment provides an LED module, including a driver and the aforementioned LED light board 100. The driver is mounted on the second mounting surface 10b of the LED light board 100. It should be noted that the driver may include a driver chip, resistors, capacitors, diodes, etc., to control the dimming and color-changing functions of the LED beads 30. The LED module may also be equipped with heat sinks, fuses, and other components to achieve heat dissipation and overcurrent protection functions. This embodiment is not limited to these, and all of the above are within the protection scope of this utility model. By providing a mesh-like electromagnetic shielding layer 40 on the surface of the substrate 10 and a shielding shell 20 on the back of the substrate 10, the light output requirements of the LED module are ensured while electromagnetic radiation leakage is suppressed to the maximum extent.

[0036] This embodiment provides a display screen, including a housing and the aforementioned LED modules. It should be noted that the screen of the display screen is composed of several LED modules spliced ​​together. The LED panel 100 of each LED module includes a substrate 10, a shielding shell 20, and several LED beads 30. The substrate 10 has a first mounting surface 10a and a second mounting surface 10b facing each other. Several LED beads 30 are spaced apart on the first mounting surface 10a. The first mounting surface 10a is provided with an electromagnetic shielding layer 40 with a mesh structure, covering the first mounting surface 10a so that the LED beads 30 emit light through the mesh structure. The second mounting surface 10b is used to mount driving devices, and the shielding shell 20 is disposed on the second mounting surface 10b to shield the electromagnetic radiation of the driving devices. By providing a mesh-like electromagnetic shielding layer 40 on the surface of the substrate 10 and a shielding shell 20 on the back of the substrate 10, the light emission requirements of the LED modules are ensured while electromagnetic radiation leakage is suppressed to the maximum extent.

[0037] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using 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. An LED light panel, characterized in that, include: The substrate comprises a substrate, a shielding shell, and a plurality of LED beads. The substrate has a first mounting surface and a second mounting surface facing each other. The plurality of LED beads are spaced apart on the first mounting surface. The first mounting surface is provided with an electromagnetic shielding layer with a mesh structure. The electromagnetic shielding layer covers the first mounting surface so that the light from the plurality of LED beads is emitted through the mesh structure. The second mounting surface is used to mount a driving device. The shielding shell is disposed on the second mounting surface and is used to shield the electromagnetic radiation of the driving device.

2. The LED lamp panel of claim 1, wherein, The electromagnetic shielding layer forms multiple display areas, which are spaced apart, and each display area has the mesh structure.

3. The LED lamp panel of claim 1 or 2, wherein, The electromagnetic shielding layer includes a conductive layer and a magnetically conductive layer, which are stacked on the first mounting surface to form the mesh structure.

4. The LED lamp panel of claim 3, wherein, The conductive layer covers the first mounting surface, and the magnetic layer covers the conductive layer.

5. The LED lamp panel of claim 3, wherein, The conductive layer is a silver or copper metal layer; and / or the magnetic layer is a nickel metal layer.

6. The LED lamp panel of claim 3, wherein, The thickness of the conductive layer is 20 μm to 25 μm; and / or, the thickness of the magnetically conductive layer is 15 μm to 20 μm.

7. The LED lamp panel of claim 1, wherein, A conductive gasket is provided between the shielding shell and the substrate, and the conductive gasket is used to seal the gap between the substrate and the shielding shell.

8. The LED lamp panel of claim 1, wherein, The surface of the electromagnetic shielding layer is provided with a functional film.

9. An LED module, characterized in that It includes a driving device and an LED light panel as described in any one of claims 1 to 8, wherein the driving device is mounted on the second mounting surface of the LED light panel.

10. A display screen, characterized by It includes a housing and the LED module as described in claim 9, wherein the LED module is disposed in the housing.

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