Commercial display highlight LED lamp bead

Abstract

The invention relates to the technical field of LEDs, in particular to a commercial display high-brightness LED lamp bead which comprises a support, a chip, a light-transmitting plate and a heat dissipation plate. The support is used for being fixedly connected with a PCB. The chip is fixedly arranged on the bracket; the light-transmitting plate comprises a lens and a light guide plate, the lens sleeves the peripheral side of the chip and is fixedly connected with the bracket, and the light guide plate is arranged on the peripheral side of the lens and is fixedly connected with the lens; a fluorescent part is arranged on the side, close to the lens, of the light guide plate and made of fluorescent materials. The heat dissipation plate is made of a heat conduction material and is connected with the bracket; the heat dissipation plate abuts against the lens and the light guide plate. Due to the combined design of the lens and the light guide plate, the uniformity and fineness of light rays of the LED lamp beads are remarkably improved, meanwhile, the display effect is enhanced through the effect of the fluorescent part, the light guide plate extends to the peripheral side of the lens, visual gaps among the lamp beads are effectively reduced, and the overall attractiveness and display consistency of the LED lamp panel are improved.

Description

Technical Field

[0001] This application relates to the technical field of LEDs, and particularly to a high-brightness LED lamp bead for commercial display. Background Art

[0002] LED displays can provide high-brightness and high-contrast display effects, and can maintain good visibility even in strong light environments. They are widely used in outdoor advertising, indoor display, stage entertainment, industrial applications and other scenarios.

[0003] An LED display is usually composed of several LED lamp boards spliced together. Each LED lamp board generally includes a PCB substrate and several LED lamp beads soldered on the PCB substrate. The several LED lamp beads are arranged in an array. By controlling the on and off of different lamp beads, the display of images or characters is realized.

[0004] However, due to the production process requirements of the LED lamp board, the arrangement of the lamp beads is restricted by the solder joints on the PCB board. Therefore, the lamp beads are usually arranged at intervals, which results in relatively large gaps between the lamp beads, thus leading to poor uniformity and fineness of the display of the LED lamp board. In addition, the LED lamp beads are usually exposed, and their impact resistance and weather resistance are also relatively poor.

[0005] In some technical solutions, a transparent shield is additionally provided on the LED lamp board to improve the weather resistance of the LED lamp board, but there is a problem of poor heat dissipation, which affects the service life of the LED lamp board.

[0006] In summary, how to improve the fineness of the display of the LED lamp board, enhance the impact resistance of the LED lamp board, and improve the working life is a technical problem that needs to be solved at present. Summary of the Invention

[0007] This application provides a high-brightness LED lamp bead for commercial display, and adopts the following technical solutions: A high-brightness LED lamp bead for commercial display includes a bracket, a chip, a light-transmitting plate and a heat-dissipating plate; The bracket is used for fixedly connecting with the PCB board; the chip is fixedly arranged on the bracket; The light-transmitting plate includes a lens and a light guide plate. The lens is sleeved on the periphery of the chip and fixedly connected with the bracket. The light guide plate is arranged on the periphery of the lens and fixedly connected with the lens. A fluorescent part is arranged on the side of the light guide plate close to the lens, and the fluorescent part uses fluorescent material; The heat-dissipating plate is made of a heat-conducting material and is connected with the bracket; the heat-dissipating plate abuts against the lens and the light guide plate.

[0008] By adopting the above technical solutions, the setting of the lens can improve the brightness of the LED, and the setting of the light guide plate, on the one hand, improves the uniformity and fineness of the light of the LED lamp beads by adding a fluorescent part, and on the other hand, extends the light guide plate to the peripheral side of the lens, which can cover the gaps between the LED lamp beads to a certain extent, thereby improving the integrity, aesthetics and impact resistance of the LED lamp board. The setting of the heat dissipation plate can effectively improve the heat dissipation efficiency of the LED lamp beads, be applicable to higher-power LED lamp beads, and thus improve the display effect of the LED lamp board.

[0009] Preferably, the heat dissipation plate is arranged in parallel with the light guide plate, and the heat dissipation plate is arranged between the light guide plate and the bracket. A central hole is formed in the heat dissipation plate, the chip is arranged in the central hole, and the lens is inserted through the central hole and abuts against the light guide plate.

[0010] By adopting the above technical solutions, the setting of the central hole can help the contact between the heat dissipation plate and the lens, and at the same time, the heat dissipation plate can timely absorb the heat generated by the operation of the LED chip, thereby optimizing the heat dissipation effect.

[0011] Preferably, a groove corresponding to the central hole is formed in the bracket, and the chip is arranged at the groove; a heat conduction plate is arranged on the inner wall of the groove, and the heat conduction plate is connected to the heat dissipation plate.

[0012] By adopting the above technical solutions, the setting of the heat conduction plate can help to increase the heat exchange area between the heat dissipation plate and the lens, thereby optimizing the heat dissipation effect.

[0013] Preferably, fins are further arranged on the heat dissipation plate, and the fins are located on the horizontal side of the bracket. When the bracket is connected to the PCB board, the fins abut against the PCB board.

[0014] By adopting the above technical solutions, the setting of the fins can, on the one hand, increase the heat dissipation area of the heat dissipation plate, and on the other hand, play a supporting role for the heat dissipation plate, which helps to improve the impact resistance, so that the LED lamp board can be applied in a more complex environment.

[0015] Preferably, the fins have a convex portion that abuts against the PCB board, and the end of the fin passes through the PCB board and extends to the side of the PCB board facing away from the bracket.

[0016] By adopting the above technical solutions, the end of the fin can be connected to an external heat dissipation fan, which helps to further improve the heat dissipation efficiency, and the setting of the convex portion can ensure sufficient support.

[0017] Preferably, a sandwich layer is arranged in the light guide plate, a metal heat conduction net is laid in the sandwich layer, the metal heat conduction net has an extension portion, and the extension portion is connected to the heat dissipation plate.

[0018] By adopting the above technical solution, since the light guide plate is generally made of polymer material and has poor heat conductivity itself, the setting of the metal heat conduction net can, on the one hand, improve the heat dissipation of the light guide plate, and on the other hand, also improve the strength and durability of the light guide plate.

[0019] Preferably, a metal heat conduction net is arranged on the surface of the light guide plate, and the metal heat conduction net is embedded in the surface of the light guide plate; the metal heat conduction net has an extension part, and the extension part is connected to the heat dissipation plate.

[0020] By adopting the above technical solution, arranging the metal heat conduction net on the surface of the light guide plate and connecting it to the heat dissipation plate can improve the heat dissipation efficiency on the surface of the LED lamp board.

[0021] Preferably, the fluorescent part and the lens are integrally formed, and the lens is flush with the surface of the light guide plate.

[0022] By adopting the above technical solution, the integral formation of the fluorescent part and the lens helps the propagation of light, thereby improving the display effect of the fluorescent part, and the fact that the lens is flush with the surface of the light guide plate can improve the flatness and aesthetic degree of the surface of the LED lamp board.

[0023] Preferably, heat-conducting silicone grease is coated between the light guide plate and the heat dissipation plate.

[0024] By adopting the above technical solution, the heat-conducting silicone grease can fill the fine gaps existing between the light guide plate and the heat dissipation plate, thereby improving the heat dissipation efficiency.

[0025] Preferably, when the commercial display LED lamp beads are fixed on the PCB board, the edges of the light-transmitting plates of two adjacent LED lamp beads are abutted against each other.

[0026] By adopting the above technical solution, after the LED lamp beads are installed on the PCB board, the abutting of the edges of the light-transmitting plates can effectively reduce the gap between two adjacent LED lamp beads, thereby improving the integrity of the surface of the LED lamp board and also improving the impact resistance.

[0027] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The combined design of the lens and the light guide plate significantly improves the light uniformity and fineness of the LED lamp beads. At the same time, the display effect is enhanced through the action of the fluorescent part, and the extension of the light guide plate to the periphery of the lens effectively reduces the visual gap between the lamp beads, improving the overall aesthetic degree and display consistency of the LED lamp board; 2. The heat dissipation plate is in direct contact with the lens and the light guide plate, greatly improving the heat dissipation efficiency, ensuring the stability and long-life operation ability of the LED lamp beads under high-power operation, and solving the problem of shortened life caused by poor heat dissipation in the traditional solution; 3. The edges of the light-transmitting plates of adjacent LED lamp beads are in contact with each other, further reducing the physical gap between the lamp beads, not only enhancing the impact resistance of the LED lamp board, but also optimizing the continuity and integrity of the display area. Brief Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of the commercial display high-brightness LED lamp bead in the embodiment of the present application; Figure 2 is a schematic diagram for showing the relative positional relationship between two adjacent LED lamp beads; Figure 3 is a schematic diagram for showing the structure when the fin passes through the PCB board.

[0029] Reference numerals in the drawings: 1, bracket; 11, groove; 2, chip; 3, light-transmitting plate; 31, lens; 32, light guide plate; 33, fluorescent part; 4, heat sink; 41, fin; 42, convex part; 5, metal heat conduction net. Detailed Description of the Embodiment

[0030] The following further describes the present invention in detail with reference to the Figures 1-3 accompanying drawings.

[0031] The present application provides a commercial display high-brightness LED lamp bead, including a bracket 1, a chip 2, a light-transmitting plate 3 and a heat sink 4; the bracket 1 is used for fixedly connecting with a PCB board, and the chip 2 is fixedly arranged on the bracket 1; the light-transmitting plate 3 includes a lens 31 and a light guide plate 32, the lens 31 is sleeved on the periphery of the chip 2 and fixedly connected with the bracket 1, and the light guide plate 32 is arranged on the periphery of the lens 31 and fixedly connected with the lens 31; a fluorescent part 33 is arranged on the side of the light guide plate 32 close to the lens 31, and the fluorescent part 33 adopts a fluorescent material; the heat sink 4 adopts a heat-conducting material, the heat sink 4 is connected with the bracket 1 and abuts against the lens 31 and the light guide plate 32. By optimizing the designs of the light-transmitting plate 3 and the heat sink 4, problems such as poor display effect, weak impact resistance and poor heat dissipation of the LED lamp board are solved, and the comprehensive performance of the LED lamp board is improved.

[0032] Specifically, referring to Figure 1 , the commercial display high-brightness LED lamp bead includes a bracket 1, a chip 2, a light-transmitting plate 3 and a heat sink 4. Among them, the bracket 1 is made of an insulating material, and a groove 11 is formed thereon, and the chip 2 is fixedly arranged in the groove 11. The bracket 1 is provided with pins connected to the chip 2, which are used for welding with the PCB board to realize the electrical connection between the chip 2 and the PCB board and the fixed connection between the bracket 1 and the PCB board.

[0033] The light-transmitting plate 3 includes a lens 31 and a light guide plate 32. The lens 31 is in the shape of a hemispherical cover, having an open end and a curved surface end. The open end is inserted inside the groove 11 and sleeved on the chip 2, and the curved surface end protrudes outside the groove 11, thus playing a protective role for the chip 2 and enhancing the brightness at the same time. The lens 31 and the bracket 1 can be fixed by bonding.

[0034] The light guide plate 32 is arranged on the peripheral side of the curved surface end, and a fluorescent part 33 is arranged on the side of the light guide plate 32 close to the lens 31. The fluorescent part 33 is made of a fluorescent material and is processed by an integral injection molding method with the lens 31. Preferably, the material of the lens 31 is the same as that of the fluorescent part 33, both being fluorescent materials, so as to enhance the lighting effect of the LED lamp beads. The light guide plate 32 is injection molded by a secondary injection molding method, that is, after the fluorescent part 33 is injection molded, the light guide plate 32 is injection molded for the second time. The light guide plate 32 is made of transparent plastic, and the color can be set to colorless or colored, which can be selected according to actual display requirements to improve the display effect.

[0035] Refer to Figure 1 , the surface of the light guide plate 32 is flush with the curved surface end of the lens 31, which can improve the flatness and aesthetics of the surface of the LED lamp beads.

[0036] In addition, refer to Figure 2 , for the area design of the light-transmitting plate 3, it is necessary to meet that when the commercial display LED lamp beads are fixed on the PCB board, the edges of the light-transmitting plates 3 of two adjacent LED lamp beads are in contact with each other. This can effectively reduce the gap between two adjacent LED lamp beads, thus improving the integrity of the surface of the LED lamp board and also enhancing the impact resistance. At the same time, it is also necessary to design a suitable size of the gap to overcome the influence of physical properties such as thermal expansion and contraction on the stability of the light-transmitting plate 3, so as to meet the use requirements of the LED lamp board in different temperature environments.

[0037] Refer to Figure 1 and Figure 3 , for the heat dissipation plate 4, it is made of a metal material with good thermal conductivity, such as aluminum alloy. Because of its low density and high thermal conductivity characteristics, it is very suitable for use as an electronic component cooling part. The heat dissipation plate 4 is arranged in parallel with the light guide plate 32, and the heat dissipation plate 4 is arranged between the light guide plate 32 and the bracket 1. A central hole penetrating the upper and lower end faces is opened in the middle part of the heat dissipation plate 4, and the central hole corresponds to the groove 11 on the bracket 1. The lens 31 passes through the central hole and contacts the surface of the heat dissipation plate 4, which helps to absorb the heat generated by the operation of the LED chip 2, thus optimizing the heat dissipation effect.

[0038] Furthermore, a heat conducting plate is also arranged on the inner wall of the groove 11, and the heat conducting plate can be formed by spraying metal powder. The heat conducting plate is in contact with the heat dissipation plate 4, thus optimizing the heat dissipation effect inside the lamp beads.

[0039] In addition, a thermal conductive silicone grease is coated between the light guide plate 32 and the heat dissipation plate 4, so as to fill the fine gaps existing between the light guide plate 32 and the heat dissipation plate 4 and improve the heat dissipation efficiency.

[0040] Furthermore, fins 41 are provided on the heat dissipation plate 4. The fins 41 are located on the horizontal side of the bracket 1 and on the side of the heat dissipation plate 4 facing away from the light transmissive plate 3. When the LED lamp beads are connected to the PCB board, the fins 41 are in contact with the surface of the PCB board. The fins 41 can increase the heat dissipation area of the heat dissipation plate 4 on the one hand, and can support the heat dissipation plate 4 on the other hand, which helps to improve the impact resistance, so that the LED lamp board can be applied in a more complex environment.

[0041] As a preferred implementation manner of the embodiment of the present application, optionally, the end of the fin 41 passes through the PCB board and extends to the side of the PCB board facing away from the bracket 1. The end of the fin 41 can be connected to an external heat dissipation fan, which helps to further improve the heat dissipation efficiency. The fin 41 has a convex portion 42 in contact with the surface of the PCB board, which can ensure sufficient support.

[0042] Furthermore, since the light guide plate 32 is generally made of polymer material and has poor thermal conductivity, a sandwich layer can be added inside the light guide plate 32. A metal heat conduction net 5 is laid in the sandwich layer. The metal heat conduction net 5 is formed by the cross distribution of thin metal wires. In order to reduce the impact on the display effect, the diameter of the metal wires is limited to less than 0.2 mm. The metal heat conduction net 5 has an extension portion, and the extension portion is connected to the heat dissipation plate 4. The metal heat conduction net 5 can improve the heat dissipation of the light guide plate 32 on the one hand, and can also improve the strength and durability of the light guide plate 32 on the other hand.

[0043] As an alternative solution, the metal heat conduction net 5 can also be laid on the surface of the light guide plate 32, and the metal net is embedded in the light guide plate 32, which can improve the heat dissipation efficiency of the LED lamp beads.

[0044] A commercial display LED lamp bead provided in this embodiment can ensure good heat dissipation performance and strong impact resistance while maintaining high brightness by optimizing the designs of the light transmissive plate 3 and the heat dissipation plate 4. Specifically, the presence of the lens 31 concentrates the energy emitted by the light source and increases the light intensity per unit area, and the fluorescent portion 33 is provided to make the high-brightness light generated by the lens 31 more continuous and smooth, greatly improving the display image quality. Coupled with the efficient heat dissipation mechanism, it ensures the reliability of long-term operation.

[0045] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A commercial display high brightness LED lamp bead, characterized by: It comprises a bracket (1), a chip (2), a light-transmitting plate (3) and a heat dissipation plate (4); The bracket (1) is used for fixed connection with the PCB board; the chip (2) is fixed on the bracket (1); The light-transmitting plate (3) comprises a lens (31) and a light guide plate (32); the lens (31) is sleeved on the peripheral side of the chip (2) and fixedly connected to the bracket (1); the light guide plate (32) is arranged on the peripheral side of the lens (31) and fixedly connected to the lens (31); a fluorescent portion (33) is arranged on a side of the light guide plate (32) close to the lens (31); the fluorescent portion (33) is made of fluorescent material; The heat dissipation plate (4) is made of heat-conducting material, and the heat dissipation plate (4) is connected to the bracket (1); the heat dissipation plate (4) is in contact with the lens (31) and the light guide plate (32).

2. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: The heat sink (4) and the light guide plate (32) are arranged in parallel, and the heat sink (4) is arranged between the light guide plate (32) and the bracket (1); a center hole is opened on the heat sink (4); the chip (2) is arranged in the center hole; and the lens (31) is passed through the center hole and abuts against the light guide plate (32).

3. The commercial display high brightness LED lamp bead according to claim 2, characterized in that: The bracket (1) is provided with a groove (11) corresponding to the central hole, and the chip (2) is arranged in the groove (11); a heat conducting plate is arranged on the inner wall of the groove (11), and the heat conducting plate is connected to the heat dissipation plate (4).

4. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: Thermal conductive silicone grease is coated between the light guide plate (32) and the heat dissipation plate (4).

5. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: The heat dissipation plate (4) is further provided with fins (41), the fins (41) being located on a horizontal side of the bracket (1), and when the bracket (1) is connected to the PCB board, the fins (41) abut against the PCB board.

6. The commercial display high brightness LED lamp bead according to claim 5, characterized in that: The fin (41) has a protruding portion (42) abutting against the PCB board, and the end of the fin (41) passes through the PCB board and extends to a side of the PCB board facing away from the bracket (1).

7. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: The light guide plate (32) is provided with an interlayer, the interlayer is provided with a metal heat-conducting mesh (5), the metal heat-conducting mesh (5) has an extension portion, and the extension portion is connected to the heat dissipation plate (4).

8. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: A metal heat-conducting mesh (5) is provided on the surface of the light guide plate (32), and the metal heat-conducting mesh (5) is embedded in the surface of the light guide plate (32); the metal heat-conducting mesh (5) has an extension portion, and the extension portion is connected to the heat dissipation plate (4).

9. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: The fluorescent portion (33) and the lens (31) are integrally formed, and the lens (31) is flush with the surface of the light guide plate (32).

10. The commercial display high brightness LED lamp bead according to claim 1, characterized in that: When the commercial display LED lamp beads are fixed on the PCB board, the edges of the light-transmitting plates (3) of two adjacent LED lamp beads abut against each other.

Images