LED street lights
By incorporating reflectors and anti-reflective coatings into LED streetlights, the problem of light absorption has been solved, resulting in a significant improvement in light extraction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIGNIFY HOLDING BV
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-03
AI Technical Summary
Existing LED streetlights have low light emission efficiency, with some of the illumination light being absorbed by the substrate and surrounding sidewalls.
A first reflector and a second reflector are installed in the LED street light. The reflectors are arranged around the LED light source array, and an anti-reflective film layer is coated on the surface of the light-transmitting plate to reflect and transmit light and avoid absorption.
It significantly improves the light output efficiency of LED streetlights, ensuring that the light is used for illumination to the maximum extent.
Smart Images
Figure CN224454425U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of street lighting technology, and more specifically, relates to an LED street light. Background Technology
[0002] Currently, when LED streetlights emit light, some of the light is absorbed by structures such as the substrate and surrounding sidewalls, meaning that not all of the light can be used for illumination, resulting in low light emission efficiency. Utility Model Content
[0003] This application provides an LED street light, which aims to improve the technical problem of low light output efficiency of existing LED street lights.
[0004] Therefore, this application provides an LED street light, including:
[0005] The lamp housing has an internal cavity with a light outlet;
[0006] A lamp panel is installed in the receiving cavity. The lamp panel includes a substrate, an LED light source array, and a first reflector. The LED light source array and the first reflector are respectively disposed on the same side surface of the substrate, and the first reflector is disposed around each LED light source in the LED light source array.
[0007] A lens is disposed within the receiving cavity and covers the LED light source array and the first reflector;
[0008] A light-transmitting plate is located at the light outlet, and an anti-reflective film is provided on the surface of the light-transmitting plate;
[0009] A second reflector is disposed within the receiving cavity and arranged around the LED light source array. The second reflector is shaped like a horn, smaller than the LED light source array and larger than the light-transmitting plate.
[0010] Optionally, in some embodiments of this application, the first reflector is a high-reflectivity film with a reflectivity of 94% to 98%.
[0011] Optionally, in some embodiments of this application, the first reflector is a highly reflective coating with a reflectivity of 75% to 90%.
[0012] Optionally, in some embodiments of this application, the lens includes a light-transmitting array and an edge portion, wherein each light-transmitting portion of the light-transmitting array corresponds one-to-one with each LED light source in the LED light source array, and the edge portion is connected between each light-transmitting portion of the light-transmitting array.
[0013] Optionally, in some embodiments of this application, the second reflector is arranged around the LED light source array and is fastened to the cavity wall of the receiving cavity by at least one snap-fit structure.
[0014] Optionally, in some embodiments of this application, the second reflector is provided with a side reflective surface, the side reflective surface being arranged around the LED light source array, and the reflectivity of the side reflective surface being 80% to 98%.
[0015] Optionally, in some embodiments of this application, the anti-reflective film layer is provided on the surface of the light-transmitting plate facing the lens; and / or,
[0016] An anti-reflective film is provided on the surface of the light-transmitting plate away from the lens.
[0017] Optionally, in some embodiments of this application, the light-transmitting plate is transparent glass or a transparent polymer plate, and the anti-reflective film is a magnesium fluoride film.
[0018] Optionally, in some embodiments of this application, the LED street light further includes a sealing ring disposed between the circumferential edge of the receiving cavity and the circumferential edge of the light-transmitting plate, so that the receiving cavity forms a sealed configuration.
[0019] Optionally, in some embodiments of this application, the LED street light further includes a plurality of pressure plates, each of which is fastened to the cavity wall of the receiving cavity by a screw structure to press one corner of the light-transmitting plate onto the lamp housing.
[0020] The LED street light provided in this application embodiment, through the above-described structural configuration, has two main advantages. First, a first reflector is provided on the same surface of the substrate where the LED light source array is located, so that when the illumination light from the LED light source array shines on the substrate, it is not absorbed by the substrate but reflected back for illumination. Second, a second reflector is arranged around the periphery of the LED light source array, so that when the illumination light from the LED light source array shines on the peripheral sidewalls, it is not absorbed by the peripheral sidewalls but reflected back by the second reflector for illumination. Third, an anti-reflective film layer is provided on the surface of the light-transmitting plate, so that when the illumination light from the LED light source array shines on the light-transmitting plate, it is not reflected by the light-transmitting plate but passes through the light-transmitting plate as much as possible for illumination. Thus, the technical solution of this application can significantly improve the light extraction efficiency of the LED street light. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of an LED street light provided in an embodiment of this application;
[0023] Figure 2 for Figure 1 The diagram shows the disassembled structure of an LED street light;
[0024] Figure 3 for Figure 1 The diagram shows the structure of the LED street light from another angle;
[0025] Figure 4 for Figure 3 The diagram shows a cross-sectional view of an LED street light cut along section line AA.
[0026] Figure 5 for Figure 4 The diagram shows a partial enlarged V-shaped structure of the LED street light.
[0027] The following are the labeling elements in the figure:
[0028] 1. LED street light; 10. Lamp housing; 11. Receiving cavity; 111. Light outlet; 12. Heat sink fins; 20. Lamp panel; 21. Substrate; 22. LED light source array; 23. First reflector; 30. Lens; 31. Light-transmitting array; 32. Edge portion; 40. Light-transmitting plate; 50. Second reflector; 51. Side reflective surface; 60. Sealing ring; 70. Pressing sheet. Detailed Implementation
[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0033] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.
[0034] Currently, when LED streetlights emit light, some of the light is absorbed by structures such as the substrate and surrounding sidewalls, meaning that not all of the light can be used for illumination, resulting in low light emission efficiency.
[0035] Therefore, it is necessary to provide an LED street light that aims to improve the technical problem of low light output efficiency of existing LED street lights.
[0036] Please see Figures 1 to 5 The LED street light 1 provided in this application embodiment will now be described. Specifically, the LED street light 1 may include a lamp housing 10, a lamp plate 20, a lens 30, a light-transmitting plate 40, and a second reflector 50. The lamp housing 10 has a receiving cavity 11 with a light outlet 111. The lamp plate 20 is installed within the receiving cavity 11 and includes a substrate 21, an LED light source array 22, and a first reflector 23. The LED light source array 22 and the first reflector 23 are respectively disposed on the same side surface of the substrate 21, and the first reflector 23 is arranged around each LED light source in the LED light source array 22. The lens 30 is disposed within the receiving cavity 11 and covers the LED light source array 22 and the first reflector 23. The light-transmitting plate 40 is located at the light outlet 111, and an anti-reflective film layer is provided on the surface of the light-transmitting plate 40. The second reflector 50 is disposed within the receiving cavity 11 and surrounds the LED light source array 22, and the second reflector 50 has a funnel shape, smaller near the LED light source array 22 and larger near the light-transmitting plate 40.
[0037] It should be noted that the LED street light 1 of this application embodiment is mainly used in outdoor lighting scenarios such as road lighting and courtyard lighting. Depending on the actual installation environment of the LED street light 1, it can also be designed with or without a light pole. When it is designed with a light pole, the LED street light 1 also includes a light pole. In this case, one end of the aforementioned lamp housing 10 can be fixedly installed or installed at an adjustable angle on the top of the light pole. When it is designed without a light pole, one end of the aforementioned lamp housing 10 can be directly installed at the corresponding installation position in the current scenario, either through a fixed installation or an adjustable angle installation.
[0038] The lamp housing 10 mentioned above is mainly used to provide a corresponding installation environment for other main components of this LED street light 1 (including but not limited to lamp panel 20, lens 30, light-transmitting plate 40, and second reflector 50, etc.). Therefore, it can be any shape or structure that does not affect the installation of other main components of this LED street light 1, including but not limited to... Figure 1 The shape and structure shown.
[0039] The aforementioned light panel 20 is specifically the main light-emitting component of this LED street light 1. It can be configured with appropriate shapes and structures according to the lighting needs of the actual application scenario of this LED street light 1, including but not limited to circular structures, or... Figure 2 The rectangular structure shown is an example. Furthermore, the lamp panel 20 can also adopt a single-panel structure, or..., depending on the lighting needs of the actual application scenario of this LED street light 1. Figure 2 The multi-panel structure shown, namely the lamp panel 20, can be as follows: Figure 2 As shown, a large light panel 20 structure is formed by splicing multiple small light panels 20 side by side.
[0040] The lens 30 mentioned above is mainly used to protect the LED light source array 22 of the lamp panel 20 while controlling the light distribution of the LED light source array 22, improving the light output efficiency, and optimizing the lighting effect. The specific structural design of this lens 30 corresponds to the structural design of the lamp panel 20; that is, when the lamp panel 20 adopts a single-plate structure, this lens 30 can also adopt a single-plate structure, and when the lamp panel 20 adopts... Figure 2 When the multi-panel structure shown is formed by assembling multiple small lamp panels 20 side by side to form a single large lamp panel 20, the lens 30 can also be adopted in the same way. Figure 2 The multi-plate structure shown is formed by assembling multiple small lenses 30 side by side to form a large lens 30 structure.
[0041] The light-emitting plate mentioned above is mainly used to cover the light-emitting port 111, providing a relatively enclosed installation environment for the lamp board 20 and the lens 30 while ensuring the light-emitting effect of the LED light source array 22 of the lamp board 20. Therefore, by setting an anti-reflective film layer on the surface of the light-emitting plate, the illumination light from the LED light source array 22 can be prevented from being reflected by the light-transmitting plate 40 when it shines on the light-transmitting plate 40, and instead, as much of it passes through the light-transmitting plate 40 as possible for illumination, thereby improving the light-emitting efficiency of the LED light source array 22.
[0042] The second reflector 50 mentioned above is mainly a side reflector. It is mainly arranged around the LED light source array 22 and located between the lens 30 and the light-transmitting plate 40. Together with the lens 30 and the light-transmitting plate 40, it forms a relatively closed light-emitting space. This allows the illumination light from the LED light source array 22 to shine outward through the lens 30, and in addition to shining on the light-transmitting plate 40 of the light-emitting port 111, it only shines on the second reflector 50 or the first reflector 23.
[0043] In this way, the LED street light 1 provided in this embodiment of the application, through the above-described structural arrangement, has the following advantages: Firstly, a first reflector 23 is provided on the same side surface of the substrate 21 where the LED light source array 22 is located, so that when the illumination light from the LED light source array 22 shines on the substrate 21, it is not absorbed by the substrate 21, but is reflected back for illumination; secondly, through the structural arrangement of a second reflector 50 surrounding the LED light source array 22, when the illumination light from the LED light source array 22 shines on the peripheral sidewall, it is not absorbed by the peripheral sidewall, but is reflected back by the second reflector 50 for illumination; thirdly, an anti-reflective film layer is provided on the surface of the light-transmitting plate 40, so that when the illumination light from the LED light source array 22 shines on the light-transmitting plate 40, it is not reflected by the light-transmitting plate 40, but passes through the light-transmitting plate 40 as much as possible for illumination. Thus, the technical solution of this application can significantly improve the light output efficiency (LOR, Light Output Ratio) of the LED street light 1.
[0044] In some examples, such as Figure 2 As shown, the first reflector 23 can specifically be a high-reflectivity film with a reflectivity of 94% to 98%. Thus, through the high reflectivity design of the high-reflectivity film, it can be further ensured that when the illumination light from the LED light source array 2222 shines on the substrate 21, it will not be absorbed by the substrate 21, but will be reflected back as much as possible for illumination, thereby improving the light output efficiency of this LED street light 1.
[0045] It should be noted that the high-reflectivity film in this example is specifically a perforated film structure, meaning that perforations are made at least at the positions of each LED light source in the LED light source array 22, so that when it is attached to the surface of the substrate 21, it will not obstruct the individual LED light sources of the LED light source array 22 located on the same surface. The high-reflectivity film in this example can be a metal film such as an aluminum-plated film or a silver film.
[0046] In some examples, the first reflector 23 may also be a highly reflective coating with a reflectivity of 75% to 90%. Thus, through the high reflectivity design of the highly reflective coating, it can be further ensured that when the illumination light from the LED light source array 22 shines on the substrate 21, it will not be absorbed by the substrate 21, but will be reflected back as much as possible for illumination, thereby improving the light output efficiency of the LED street light 1.
[0047] It should be noted that the high reflectivity coating in this example can be a metal coating (such as an aluminum plating layer or a silver plating layer) or a high reflectivity paint coating (such as a white ink). When it is a metal coating, it can be electroplated onto the surface of the substrate 21. When it is a high reflectivity paint coating, it can be applied to the surface of the substrate 21 by screen printing or spraying.
[0048] In some examples, the first reflector 23 may also be a high-reflectivity paper with a reflectivity of 88%-95%. Thus, by using the high reflectivity design of the high-reflectivity paper, it can be further ensured that when the illumination light from the LED light source array 22 shines on the substrate 21, it will not be absorbed by the substrate 21, but will be reflected back as much as possible for illumination, thereby improving the light output efficiency of the LED street light 1.
[0049] It should be noted that the high-reflectivity paper in this example is a specially designed paper, typically using paper as the substrate and coated with a high-reflectivity coating (such as barium sulfate, titanium dioxide, etc.), or employing a multi-layer composite structure to achieve high surface reflectivity. In this example, the high-reflectivity paper is specifically a perforated film structure, meaning that perforations are made at least at the positions corresponding to each LED in the LED light source array 22, so that when it is attached to the surface of the substrate 21, it does not obstruct the individual LEDs of the LED light source array 22 located on the same surface.
[0050] In some examples, such as Figure 2 , Figure 4 and Figure 5As shown, the lens 30 specifically includes a light-transmitting array 31 and an edge portion 32. Each light-transmitting portion of the light-transmitting array 31 corresponds one-to-one with each LED light source in the LED light source array 22, and the edge portion 32 connects the various light-transmitting portions of the light-transmitting array 31. Thus, through this structural arrangement, each LED light source can be covered and protected by its corresponding light-transmitting portion while simultaneously controlling its light distribution, thereby improving the light output efficiency and optimizing the lighting effect.
[0051] In some examples, such as Figure 2 As shown, the second reflector 50 is arranged around the LED light source array 22 and is fastened to the cavity wall of the receiving cavity 11 by at least one snap-fit structure (not shown). Thus, this structural arrangement allows for screwless installation of the second reflector 50, facilitating its installation and removal.
[0052] It should be noted that the snap-fit structure in this example can be either the snap-fit part engaging with the snap-fit part, or the snap-fit part engaging with the snap-fit groove.
[0053] In some examples, such as Figure 2 , Figure 4 and Figure 5 As shown, the second reflector 50 is provided with a side reflective surface 51, which surrounds the LED light source array 22. The reflectivity of the side reflective surface 51 is 80% to 98%. In this way, the high reflectivity design of the side reflective surface 51 further ensures that when the illumination light from the LED light source array 22 shines on the peripheral sidewall, it will not be absorbed by the peripheral sidewall, but will be reflected back by the side reflector of the second reflector 50 as much as possible for illumination, thereby improving the light output efficiency of this LED street light 1.
[0054] It should be noted that the second reflector 50 in this example can be made entirely of a highly reflective material such as metal, or it can be a highly reflective film, a highly reflective coating, or a highly reflective paper only on the side reflective surface 51.
[0055] In some examples, such as Figures 2 to 5 As shown, an anti-reflective film is provided on the surface of the light-transmitting plate 40 facing the lens 30. In this way, the structure of the anti-reflective film ensures that when the illumination light from the LED light source array 22 shines on the light-transmitting plate 40, it first strikes the anti-reflective film before entering the light-transmitting plate 40. This prevents the illumination light from being reflected by the light-transmitting plate 40, allowing it to pass through as much of the plate as possible for illumination, thereby improving the light output efficiency of the LED street light 1.
[0056] In some examples, such as Figures 2 to 5As shown, an anti-reflective film is provided on the surface of the light-transmitting plate 40 away from the lens 30. In this way, the anti-reflective design of the anti-reflective film ensures that the illumination light from the LED light source array 22 is not reflected by the light-transmitting plate 40 when it shines on the light-transmitting plate 40, but passes through the light-transmitting plate 40 as much as possible for illumination, thereby improving the light output efficiency of the LED street light 1.
[0057] It should be noted that, compared to the previous example and this example which only provide an anti-reflective film layer on one side of the light-transmitting plate 40 to improve the light emission efficiency of the LED street light 1, it is preferable to provide an anti-reflective film layer on both sides of the light-transmitting plate 40, which is more effective in improving the light emission efficiency of the LED street light 1. Furthermore, regarding providing an anti-reflective film layer on one side, compared to this example where the anti-reflective film layer is provided on the side of the light-transmitting plate 40 away from the lens 30, the previous example where the anti-reflective film layer is provided on the side of the light-transmitting plate 40 facing the lens 30 is more effective in improving the light emission efficiency of the LED street light 1.
[0058] In some examples, such as Figures 2 to 5 As shown, the light-transmitting plate 40 can be made of transparent glass or a transparent polymer plate, and the anti-reflective film is specifically a magnesium fluoride film. In this way, the high light transmittance of the transparent glass or transparent polymer plate ensures that it does not affect the illumination output of the light outlet 111. Furthermore, the high anti-reflective properties of the magnesium fluoride film ensure that the illumination light from the LED light source array 22 is not reflected by the light-transmitting plate 40, but rather passes through the light-transmitting plate 40 as much as possible for illumination, thereby improving the light output efficiency of the LED street light 1.
[0059] It should be noted that, taking the magnesium fluoride film layer in this example as being provided on both sides of the light-transmitting plate 40, it can increase the overall transmittance of all illumination light incident on the light-transmitting plate 40 by 3%-5%, and increase the transmittance of illumination light with an incident angle of about 70° by about 10%.
[0060] In some examples, such as Figure 2 , Figure 3 and Figure 5 As shown, the LED street light 1 also includes a sealing ring 60, which is disposed between the circumferential edge of the receiving cavity 11 and the circumferential edge of the light-transmitting plate 40 to form a sealed configuration for the receiving cavity 11. In this way, the waterproof performance inside the receiving cavity 11 can be ensured through the structural design of the sealing ring 60.
[0061] In some examples, such as Figure 1 , Figure 2 and Figure 3As shown, the LED street light 1 also includes multiple pressing plates 70. Each pressing plate 70 is fastened to the cavity wall of the receiving cavity 11 by a screw structure to press one corner of the light-transmitting plate 40 onto the lamp housing 10. In this way, the structural design of multiple pressing plates 70 ensures that the light-transmitting plate 40 is tightly set on the light outlet 111.
[0062] In some examples, such as Figure 1 As shown, several heat dissipation fins 12 are provided on the surface of the lamp housing 10 away from the light outlet 111. In this way, the heat dissipation area of the lamp housing 10 can be effectively increased through the structural design of the several heat dissipation fins 12.
[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An LED street lamp (1), characterized in that include: The lamp housing (10) has a receiving cavity (11) with a light outlet (111) inside; A lamp plate (20) is installed in the receiving cavity (11). The lamp plate (20) includes a substrate (21), an LED light source array (22), and a first reflector (23). The LED light source array (22) and the first reflector (23) are respectively disposed on the same side surface of the substrate (21), and the first reflector (23) is disposed around each LED light source in the LED light source array (22). A lens (30) is disposed within the receiving cavity (11) and covers the LED light source array (22) and the first reflector (23); A light-transmitting plate (40) is located at the light outlet (111), and an anti-reflective film is provided on the surface of the light-transmitting plate (40); The second reflector (50) is disposed in the receiving cavity (11) and arranged around the LED light source array (22). The second reflector (50) is in the shape of a horn, which is smaller than the LED light source array (22) and larger than the light-transmitting plate (40).
2. The LED street lamp (1) as defined in claim 1, characterized in that The first reflector (23) is a high-reflectivity film with a reflectivity of 94% to 98%.
3. The LED street light (1) as described in claim 1, characterized in that, The first reflector (23) has a high reflectivity coating with a reflectivity of 75% to 90%.
4. The LED street lamp (1) as defined in claim 1, characterized in that The lens (30) includes a light-transmitting part array (31) and an edge part (32). Each light-transmitting part of the light-transmitting part array (31) corresponds to each LED light source in the LED light source array (22). The edge part (32) is connected between each light-transmitting part of the light-transmitting part array (31).
5. The LED street lamp (1) as defined in claim 1, characterized in that The second reflector (50) is arranged around the LED light source array (22) and is fastened to the cavity wall of the receiving cavity (11) by at least one snap-fit structure.
6. The LED street light (1) as described in claim 1, characterized in that, The second reflector (50) is provided with a side reflective surface (51) which is arranged around the LED light source array (22) and has a reflectivity of 80% to 98%.
7. The LED street lamp (1) as defined in claim 1, characterized in that The anti-reflective film layer is provided on the surface of the light-transmitting plate (40) facing the lens (30); and / or, An anti-reflective film is provided on the side of the light-transmitting plate (40) away from the lens (30).
8. The LED street lamp (1) as defined in claim 7, characterized in that The light-transmitting plate (40) is a transparent glass or a transparent polymer plate, and the anti-reflective film is a magnesium fluoride film.
9. The LED street lamp (1) according to any of the claims 1-8, characterized in that, The LED street light (1) also includes a sealing ring (60), which is disposed between the circumferential edge of the receiving cavity (11) and the circumferential edge of the light-transmitting plate (40) so that the receiving cavity (11) forms a sealed configuration.
10. The LED street lamp (1) according to any of the claims 1-8, characterized in that, The LED street light (1) also includes multiple pressure plates (70), each of which is fastened to the cavity wall of the receiving cavity (11) by a screw structure to press one corner of the light-transmitting plate (40) onto the lamp housing (10).