Street light

Abstract

The application provides a street lamp, which comprises a lamp pole and an optical system, the optical system comprising a reflecting cup, a light source and a light splitting element, the length direction of the reflecting cup being consistent with the extension direction of the road, the width direction of the reflecting cup corresponding to the two sides of the road, and the light source being arranged close to one side of the long side of the reflecting cup; the light splitting element is arranged in the light emitting direction of the light source and has a first reflecting surface and a second reflecting surface which are oppositely arranged and obliquely arranged towards the light source, so as to separate the light source into two parts, one part being on the side of the first reflecting surface and the other part being on the side of the second reflecting surface, so that the light emitted by the light source is reflected towards the outside through the first reflecting surface and the second reflecting surface respectively; the extension direction of the light splitting element is perpendicular to the length direction of the reflecting cup, so as to reflect the light emitted by the light source towards the two sides of the length direction of the reflecting cup; the position of the light splitting element relative to the light source on the horizontal plane is adjustable, so as to change the light emitting angle of the light source, and the application is suitable for direct lighting and inverse lighting of the road and is not prone to causing glare.

Description

Technical Field

[0001] This invention relates to a street lamp, belonging to the field of lighting technology. Background Technology

[0002] Currently, most streetlights in road lighting use LED chips with lenses, and secondary light distribution via reflectors to improve light source utilization. However, because LEDs have poor light uniformity, there is more overlapping light in the center, resulting in strong illuminance, while the light is weaker and the illuminance is lower in the surrounding areas, causing uneven brightness and thus failing to effectively utilize the LED light source. While reflector-type streetlights provide more uniform illumination, they struggle to improve the light distribution angle.

[0003] In view of this, it is indeed necessary to propose a street light to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a street light that can distribute the light from the center to both sides.

[0005] To achieve the above objectives, the present invention provides a street light, including a lamp post and an optical system mounted on the lamp post. The optical system includes a reflector, a light source, and a beam splitter. The light source and the beam splitter are both disposed in the reflector. The reflector has a length direction and a width direction. The length direction of the reflector is consistent with the road extension direction, and the width direction of the reflector corresponds to both sides of the road. The light source is disposed on the side closer to the long side of the reflector. The beam splitter is disposed in the light emission direction of the light source and has a first reflective surface and a second reflective surface that are obliquely arranged and opposite to the light source to divide the light source into two parts, one part of which is located on one side of the first reflective surface and the other part is located on one side of the second reflective surface, so that the light emitted by the light source is reflected outward through the first reflective surface and the second reflective surface respectively; the extension direction of the beam splitter is perpendicular to the length direction of the reflector cup to reflect the light emitted by the light source to both sides of the length direction of the reflector cup; the position of the beam splitter relative to the light source on the horizontal plane is adjustable to change the light emission angle of the light source.

[0006] As a further improvement of the present invention, the first reflective surface and the second reflective surface are symmetrically arranged along the light emission direction of the light source.

[0007] As a further improvement of the present invention, the light source includes a light-emitting element having a light-emitting surface, and the beam-splitting element is disposed on the light-emitting element and divides the light-emitting surface into two parts.

[0008] As a further improvement of the present invention, the beam-splitting element is disposed at a symmetrical position of the light-emitting element and divides the light-emitting surface into two equal parts, so that the amount of light reflected by the first reflective surface and the second reflective surface are equal respectively.

[0009] As a further improvement of the present invention, the beam-splitting element is disposed at an asymmetrical position of the light-emitting element and divides the light-emitting surface into two unequal parts, so that the amount of light reflected by the first reflective surface and the second reflective surface are unequal respectively.

[0010] As a further improvement of the present invention, the beam-splitting element further includes a third interface connected to the first reflective surface and the second reflective surface respectively, the third interface being disposed on the side away from the light source and parallel to the light-emitting surface.

[0011] As a further improvement of the present invention, the first reflective surface and the second reflective surface are combined into a V-shape and formed on the two outer sidewalls of the beam splitter. The first reflective surface and the second reflective surface are bent toward the direction of the third interface. Both the first reflective surface and the second reflective surface are free-form surfaces.

[0012] As a further improvement of the present invention, the beam splitting element is perpendicular to the light-emitting surface and extends in a horizontal direction, the length of the beam splitting element in its extension direction is greater than or equal to the length of the light-emitting surface in that direction, and the orthogonal projection area of ​​the beam splitting element on the light-emitting surface is less than or equal to the area of ​​the light-emitting surface.

[0013] As a further improvement of the present invention, the light source includes a plurality of LED beads, which are respectively disposed on both sides of the extension direction of the beam splitter.

[0014] As a further improvement of the present invention, the bottom of the reflector cup is rectangular, and the light source is positioned near one of the long sides of the rectangle.

[0015] The beneficial effects of this invention are: by setting a beam splitting element at the light source, the light emitted along the center of the street lamp is reflected to a larger angle after passing through the beam splitting element, thereby increasing the lighting range and brightness of the street lamp. It is suitable for both front lighting and backlighting of roads and is less likely to cause glare. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the optical system of the present invention.

[0017] Figure 2 This is a schematic diagram of the optical path structure of the beam splitter element in the optical system of the present invention.

[0018] Figure 3 middle, Figure 3a is a schematic diagram of the road illumination with the beam splitter positioned slightly to the left of the center in the optical system of this invention. Figure 3 b is Figure 3 A schematic diagram of the light distribution of a.

[0019] Figure 4 middle, Figure 4 a is a schematic diagram of the illumination on both sides of the road at the center position of the beam-splitting element in the optical system of the present invention. Figure 4 b is Figure 4 A schematic diagram of the light distribution of a.

[0020] Figure 5 middle, Figure 5 a is a schematic diagram of backlighting on the road at different positions slightly to the right of the beam-splitting element in the optical system of this invention. Figure 5 b is Figure 5 A schematic diagram of the light distribution of a.

[0021] Figure label: 100. Streetlights; 10. Reflector; 20. Light source; 30. Spectroscopic element; 31. First reflecting surface; 32. Second reflecting surface; 33. Third interface. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0024] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] like Figure 1 As shown, this invention discloses a lamp 100, which is a street lamp. The lamp 100 has a beam-splitting element 30 at its lower part for dispersing the central light to both sides. Of course, in other embodiments of this invention, the lamp 100 includes, but is not limited to, street lamps, which will not be described in detail here, nor will any limitations be imposed. For clarity, the following description will use the application of this beam-splitting element 30 to a street lamp as an example for detailed explanation.

[0026] The lamp 100 includes a lamp post and an optical system mounted on the lamp post. The optical system includes a reflector 10, a light source 20, and a beam splitter 30. Both the light source 20 and the beam splitter 30 are disposed within the reflector 10. The beam splitter 30 is positioned along the light emission direction of the light source 20, dividing the light source 20 into two parts. The light emission angle of the light source 20 is altered depending on the position of the beam splitter 30. The beam splitter 30 may be made of materials including, but not limited to, glass, as long as it allows the light emitted from the light source 20 to be reflected by the beam splitter 30.

[0027] Specifically, the reflector 10 has a frustum-shaped inner cavity. The bottom of the reflector 10 is rectangular and includes both length and width directions. The length direction of the reflector 10 is consistent with the road extension direction, and the width direction of the reflector 10 corresponds to both sides of the road. This arrangement maximizes the illumination range of the lamp 100 along the road extension direction. It is worth noting that when the lamp 100 is a street lamp, since it is located on one side of the road, the light source 20 needs to be positioned close to that side within the reflector 10, that is, the light source 20 is positioned close to the long side of the reflector 10.

[0028] The beam-splitting element 30 includes a first reflective surface 31, a second reflective surface 32, and a third interface 33 connected in sequence. The beam-splitting element 30 is approximately a horizontally extending triangular prism with one corner facing the light source 20. Specifically, the first reflective surface 31 and the second reflective surface 32 are combined into a V-shape on the two outer sidewalls of the beam-splitting element 30, such that both are obliquely opposite to the light source 20. The third interface 33 is horizontally positioned on the side away from the light source 20. The beam-splitting element 30 extends perpendicularly to the length direction of the reflector cup 10, reflecting the light emitted from the light source 20 to both sides of the reflector cup 10 along its length. It is understood that the light emitted from the light source 20, after being reflected by the reflector cup 10, can also be reflected onto the first reflective surface 31 and the second reflective surface 32, and then reflected outwards through the first reflective surface 31 and the second reflective surface 32. Preferably, the first reflective surface 31 and the second reflective surface 32 are symmetrically arranged along the light emission direction of the light source 20. The beam splitter 30 can be positioned at the exact center of the light source 20, such that the light-emitting portions on both sides of the beam splitter 30 are identical, so that the amount of light reflected by the first reflective surface 31 and the second reflective surface 32 is approximately equal. This arrangement ensures that when the luminaire 100 illuminates the ground, the illumination range on both the front and rear sides along the road's extension direction is the same. Of course, when encountering unconventional roads, the illumination range of the luminaire 100 can also be adjusted by changing the position of the beam splitter 30 relative to the light source 20 on the horizontal plane. That is, changing the proportion of the beam splitter 30 relative to the light source 20 alters the light distribution, dividing the light-emitting surface into two unequal parts to enhance unilateral illumination, suitable for both front lighting and backlighting on roads.

[0029] In a preferred embodiment of the present invention, both the first reflective surface 31 and the second reflective surface 32 are curved toward the third interface 33, that is, both the first reflective surface 31 and the second reflective surface 32 are curved toward the interior of the beam-splitting element 30, so that the light emitted by the light source 20 is diverged through the first reflective surface 31 and the second reflective surface 32 respectively, increasing the light distribution angle and making the light illumination range larger. Further, the angle of the light can be controlled by controlling the degree of curvature of the first reflective surface 31 and the second reflective surface 32, and can be set as needed without any limitation. Preferably, both the first reflective surface 31 and the second reflective surface 32 are free-form surfaces.

[0030] In other embodiments of the present invention, the light source 20 includes a light-emitting element with a light-emitting surface, and a beam-splitting element 30 is disposed on the light-emitting element and divides the light-emitting surface into two parts. The third interface 33 is parallel to the light-emitting surface, and the beam-splitting element 30 can abut against the light-emitting surface. The beam-splitting element 30 extends in a direction parallel to the first reflecting surface 31 and the second reflecting surface 32, which is equivalent to the beam-splitting element 30 being perpendicular to the light-emitting surface and extending in a horizontal direction. The length of the beam-splitting element 30 in its extending direction is greater than or equal to the length of the light-emitting surface in that direction, so that the light emitted by the light source 20 toward the center can be sufficiently reflected by the first reflecting surface 31 or the second reflecting surface 32.

[0031] Furthermore, the length of the third interface 33 in the direction perpendicular to the extension of the beam-splitting element 30 is less than or equal to the length of the light-emitting surface in that direction; that is, the projected area of ​​the beam-splitting element 30 on the light-emitting surface is less than or equal to the area of ​​the light-emitting surface. When the third interface 33 is large enough, it can block the direct vertical light rays from the light source 20 and cause these rays to pass through the beam-splitting element 30 to produce reflection. Of course, the specific size of the third interface 33 can be set as needed, and no limitations are imposed here.

[0032] In other embodiments of the present invention, the light source 20 includes a plurality of LED beads, which are respectively disposed on both sides of the extending direction of the beam splitter 30. The number of LED beads on both sides of the beam splitter 30 can be the same to obtain the same lighting effect. Of course, the number of LED beads can also be different. By setting the number of LED beads, it is equivalent to changing the relative position of the beam splitter 30, thereby changing the angle of the light emitted by the light source 20, so that the amount of light reflected by the first reflecting surface 31 and the second reflecting surface 32 is approximately equal or unequal.

[0033] In another embodiment of the present invention, the first reflective surface 31 and the second reflective surface 32 may also be reflective surfaces. This arrangement causes the light emitted by the light source 20 to be reflected by the first reflective surface 31 and the second reflective surface 32, and then reflected back to the reflector cup 10, thereby reducing the illumination of the central part of the lamp 100 and enhancing the illumination on both sides.

[0034] In summary, by setting a beam splitter 30 at the light source 20, the light emitted along the center of the lamp 100 is reflected to a larger angle after passing through the beam splitter 30, thereby increasing the illumination range and brightness of the lamp 100. This makes it suitable for both front lighting and backlighting on roads and is less likely to cause glare.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A street light, characterized in that: The light pole includes an optical system mounted on the light pole. The optical system includes a reflector (10), a light source (20), and a beam splitter (30). The light source (20) and the beam splitter (30) are both mounted in the reflector (10). The reflector (10) includes a length direction and a width direction. The length direction of the reflector (10) is consistent with the road extension direction. The width direction of the reflector (10) corresponds to both sides of the road. The light source (20) is mounted on the side closer to the long side of the reflector (10). The beam splitter (30) is disposed in the light emission direction of the light source (20) and has a first reflective surface (31) and a second reflective surface (32) that are obliquely arranged and opposite to the light source (20) to divide the light source (20) into two parts, one part of which is located on the side of the first reflective surface (31) and the other part is located on the side of the second reflective surface (32), so that the light emitted by the light source (20) is reflected outward through the first reflective surface (31) and the second reflective surface (32) respectively; The beam splitter (30) extends perpendicularly to the length of the reflector (10) to reflect the light emitted by the light source (20) to both sides of the length of the reflector (10); the position of the beam splitter (30) relative to the light source (20) on the horizontal plane is adjustable to change the light emission angle of the light source (20).

2. The street light according to claim 1, characterized in that: The first reflective surface (31) and the second reflective surface (32) are symmetrically arranged along the light emission direction of the light source (20).

3. The street light according to claim 1, characterized in that: The light source (20) includes a light-emitting element with a light-emitting surface, and the beam-splitting element (30) is disposed on the light-emitting element and divides the light-emitting surface into two parts.

4. The street light according to claim 3, characterized in that: The beam splitter (30) is positioned symmetrically to the light-emitting element and divides the light-emitting surface into two equal parts so that the amount of light reflected by the first reflective surface (31) and the second reflective surface (32) is equal.

5. The street light according to claim 3, characterized in that: The beam splitter (30) is positioned at an asymmetrical location on the light-emitting element and divides the light-emitting surface into two unequal parts, so that the amount of light reflected by the first reflective surface (31) and the second reflective surface (32) are unequal.

6. The street light according to claim 3, characterized in that: The beam splitter (30) further includes a third interface (33) connected to the first reflective surface (31) and the second reflective surface (32) respectively. The third interface (33) is disposed on the side away from the light source (20) and parallel to the light-emitting surface.

7. The street light according to claim 6, characterized in that: The first reflective surface (31) and the second reflective surface (32) are combined into a V-shape and formed on the two outer sidewalls of the beam splitter (30). The first reflective surface (31) and the second reflective surface (32) are bent toward the third interface (33). Both the first reflective surface (31) and the second reflective surface (32) are free-form surfaces.

8. The street light according to claim 3, characterized in that: The beam splitter (30) is perpendicular to the light-emitting surface and extends in the horizontal direction. The length of the beam splitter (30) in its extension direction is greater than or equal to the length of the light-emitting surface in that direction. The orthogonal projection area of ​​the beam splitter (30) on the light-emitting surface is less than or equal to the area of ​​the light-emitting surface.

9. The street light according to claim 1, characterized in that: The light source (20) includes a plurality of LED beads, which are respectively disposed on both sides of the extension direction of the beam splitter (30).

10. The street light according to claim 1, characterized in that: The bottom of the reflector cup (10) is rectangular, and the light source (20) is positioned near one of the long sides of the rectangle.

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