WO2012089077A1

WO2012089077A1 - Led light source assembly and led light fixture applied to low-location lighting

Info

Publication number: WO2012089077A1
Application number: PCT/CN2011/084624
Authority: WO
Inventors: 梁毅
Original assignee: 北京朗波尔光电股份有限公司
Priority date: 2010-12-30
Filing date: 2011-12-26
Publication date: 2012-07-05
Also published as: CN102109132A; CN102109132B

Abstract

An LED light source assembly and an LED light fixture applied to low-location lighting. The LED light source assembly comprises multiple LED light source units installed on a same LED substrate (4) in an array arrangement. Each LED light source unit comprises a light source (5) and a lens (6) covering the light source. The lens is provided with a concave incidence surface (61) for the incidence of light rays of the light source and an emergence surface (62) for the emergence of the light rays. The emergence surface is a free curved surface and is provided with a boundary which divides the free curved surface into two sides. The curvature change of one side of the curved surface is smaller than that of the other side of the curved surface, so that the light rays are deflected to the side of the curved surface with smooth and slow curvature change on the emergence surface through the lens. The LED light source assembly can enable the light rays to be directionally emitted and focused, thereby greatly enhancing the utilization efficiency of light energy, and has advantages of providing various installation modes and achieving an excellent heat radiating effect.

Description

LED light source assembly and LED lamp for low-level illumination

The invention belongs to the field of illumination, and in particular to an LED (light emitting diode) light source assembly and an LED lamp for low-level illumination. Background technique

Road lighting has emerged along with the emergence of roads, and has brought convenience to people's daily transportation life in terms of safety, comfort and convenience. However, the road surface lighting equipment commonly used in the market today is basically all conventional pole type road lamps. With the advancement of science and technology, people have begun to find that conventional pole type road lamps have great limitations in many applications.

The high poles of conventional pole road lamps have caused a lot of inconvenience in installation and maintenance. During the installation and maintenance process, the staff needs to work at heights, so there is a certain personal safety hazard. Moreover, the lighting equipment placed at high altitude imposes extremely strict requirements on the wind resistance, earthquake resistance and weather resistance of its fixed equipment (mainly street lamp poles), and there are also certain safety hazards, especially for bridges and other applications. At the site, the vibration and vibration generated by the pole-type road lamps affected by environmental factors such as wind power may even have a destructive effect on the roadbed.

In addition, due to the visual impact of glare on the driver, it will greatly reduce the perceived comfort and visual recognition ability of the human eye, thus causing traffic accidents. Therefore, in road traffic lighting applications, the requirements for glare control are very strict. However, conventional pole type road lamps have a wide angle of light emission due to the requirement of the illumination width, and it is difficult to control the glare.

On the other hand, based on the limitations of the light distribution technology, in the special road applications such as ramps and special single-row and multi-bend, the conventional pole-type road lamps are not completely concentrated on the road surface due to their floodlighting characteristics. The guiding nature of lighting does not meet the demand, resulting in blind spots in road lighting, which in turn is likely to cause traffic accidents. Summary of the invention

In view of this, the technical problem to be solved by the present invention is to provide a low-level illumination application. LED light source components and LED lamps, suitable for installations of conventional pole-type road lamps, such as ramps, viaducts, general bridges, overpasses, auxiliary roads, temporary stops, etc., with low-level installation to meet the lighting needs of most special applications , that is, directional emission and wide illumination range without glare.

In order to solve the above technical problem, the present invention provides an LED light source assembly for low-level illumination, comprising: a plurality of arrayed LED light source units mounted on the same LED substrate; the LED light source unit, comprising: a light source And a lens disposed on the light source, the lens has a concave light incident surface for the light of the light source to enter and a light exit surface for the light to be emitted, the light exit surface is a free curved surface having a score The boundary line divides the free-form surface into two sides, and the curvature of one side curved surface is slower than the other side curved surface, so that the light is deflected by the lens toward the curved surface on which the curvature of the light-emitting surface changes gently.

Further, the area of the one side curved surface whose curvature changes gently is greater than or equal to the other side curved surface. Further, the light incident surface includes at least two quadric surfaces, the curved surfaces are arranged side by side, and the curvature of the curved surface monotonously changes along the arrangement direction of the curved surface, so that the light passes through the lens toward the light incident surface. a curved side deflection of a curvature; wherein a central axis of the light incident surface passes through the light source position; the boundary line is an alignment direction parallel to the quadratic surface of the light incident surface and a plane including the central axis is The projection on the light-emitting surface; the projection direction of the curvature direction of the free-form surface on the light-emitting surface is at an angle to the direction of the arrangement of the quadric surface on the light-incident surface.

Further, the light incident surface includes at least one free curved surface shaped as the light emitting surface, such as a plurality of the free curved surfaces, the free curved surfaces are arranged side by side, and the curvature of each free curved surface changes along the direction of the free curved surface. The trend is the same, so that the light is deflected by the lens toward the light-incident surface on the light-incident side of the curvature of the curved surface; wherein the central axis of the light-incident surface passes through the light source position; a trend direction parallel to a curvature change of the free curved surface on the light incident surface and a projection of the plane containing the central axis on the light exit surface; a projection of a trend direction of the curvature of the free curved surface on the light exit surface on a horizontal plane There is an angle between the trend direction of the curvature of the free-form surface on the incident surface.

Further, the lens cover is disposed on the light source such that a central axis of the light incident surface coincides with an optical axis of the light source, and the angle is 90 degrees.

Further, the method further includes: a reflector, a curve having a large curvature change on a light exiting surface of the lens On one side of the face, the light emitted from the curved surface is reflected to the other side; the lens is left with a card, the reflector is placed in the card position; or the reflector is fixed with the lens to the aluminum of the light-emitting component On the substrate or heat sink.

Further, the reflective surface of the reflector is a quadric surface or a free curved surface, and the high reflectivity material is plated to obtain a specular reflection effect or a diffuse reflection effect; the outer surface of the reflector is etched or matte to break up other The light emitting component illuminates the light of the outer surface.

Further, the plurality of LED light source units on the LED light source assembly are arranged in a line; the lens is rotated such that a direction of curvature of the free curved surface on the light exit surface of the lens of the LED light source unit has a trend direction and a direction of the straight line arrangement. Angle.

In order to solve the above technical problem, the present invention further provides an LED lamp for low-level illumination, comprising: at least one LED light source component; the LED light source component further comprising: a plurality of array rows mounted on the same LED substrate The LED light source unit of the cloth; the LED light source unit further includes: a light source and a lens disposed on the light source, the lens having a concave light incident surface for the light of the light source to enter and a light to be emitted The light-emitting surface is a free-form surface having a boundary line dividing the free-form surface into two sides, and the curvature of one side curved surface is slower than the other side curved surface, so that the light passes through the lens to the light-emitting surface A curved surface with a gentle curvature on the surface is deflected.

Further, the light incident surface includes at least one free curved surface shaped as the light emitting surface, such as a plurality of the free curved surfaces, the free curved surfaces are arranged side by side, and the curvature of each free curved surface changes along the direction of the free curved surface. The trend is the same, so that the light is deflected by the lens toward the light-incident surface on the light-incident side of the curvature of the curved surface; wherein the central axis of the light-incident surface passes through the light source position; a direction parallel to the curvature of the free-form surface of the incident surface and a projection of a plane including the central axis on the light-emitting surface; a projection direction of a curvature direction of the free-form surface on the light-emitting surface is at an angle to a trend direction of a curvature change of the free-form surface on the light-incident surface .

The technical effects obtained by the present invention are compared with the existing solutions:

The technical solution solves the problem that the conventional pole type road lamps are not suitable for installation in the application sites such as ramps, viaduct roads, general bridges, interchanges, auxiliary roads, temporary stops, etc., and specializes in designing and structural design for these special application environments. Light distribution design; special design for these special application environments, such as embedded installation, suction-mounted installation, etc.; good heat dissipation design for different installation methods;

The light can be directionally emitted and gathered to greatly improve the utilization efficiency of light energy. In practical applications, the light emitted by the luminaire should be illuminated along the driving direction as much as possible, and the distance of the illumination is close to the distance between the two lamps; It can prevent the light from being emitted backwards to prevent the driver's eyes from illuminating and other unfavorable factors. In addition, in the direction of the vertical road, the light emitted by the luminaire can shine as much as possible on the road surface. The distance illuminated in this direction is close to the road. Width, providing a better exit light path, increasing the light energy utilization of the road surface and the longitudinal and lateral illumination uniformity of the road surface;

The technical scheme has reasonable structural design, high-intensity lamp body structure, excellent heat dissipation effect, diversified installation manner, precise light distribution design, high efficiency light transmittance utilization, and ensures that the lamp can work under severe special outdoor environment. , with better optical application performance. BRIEF abstract

Figure 1 is a schematic exploded view of the present invention.

Figure 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is a schematic view of the LED light source unit of the present invention.

4 is a schematic exploded view of the LED light source assembly of the present invention.

5 is a schematic structural view of an LED light source unit according to the present invention, wherein FIG. 5a) is an overall structural diagram of the LED light source unit, and FIG. 5b is a schematic exploded view of the LED light source unit.

Figure 6 is a side elevational view of the LED lens of the present invention, wherein Figures 6a through 6e are schematic views of different sides, respectively. Fig. 7 is a view of the optical path of the light passing through the LED lens of the present invention, wherein Fig. 7a is an optical path diagram of the light rays in the X direction and the Y direction, and Fig. 7b is an optical path diagram of the light rays in the Y direction.

Figure 8 is a schematic view of the lens arrangement of the present invention.

Fig. 9 is a schematic view showing the comparison of the optical paths before and after the installation of the reflector of the present invention, wherein Fig. 9a is a schematic view of the optical path before the reflector is installed, and Fig. 9b is a schematic view of the optical path after the reflector is mounted.

Fig. 10 is a schematic view showing the illumination range of the lamp of the present invention, wherein Fig. 10a is a schematic view of the illumination range of the lamp along the driving direction, and Fig. 10b is a schematic view of the illumination range of the lamp along the road surface.

[Main component symbol description]

End cover 1, waterproof pad 2, lamp body 3, LED substrate 4, LED light source 5, LED lens 6, reflector 7, light transmissive panel 8, occlusion panel 9, LED driving power source 10, electrical bracket 11, respirator 12 , waterproof connector 13.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the drawings and embodiments, so that the application of the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

The core idea of the present invention is: an LED light source assembly applied to low-level illumination, comprising: a plurality of arrayed LED light source units mounted on the same LED substrate; the LED light source unit comprising: a light source and a cover disposed at a lens on the light source, the lens having a concave incident surface into which the light of the light source is incident and a light exiting surface for the light to be emitted, the light exiting surface being a free curved surface having a boundary line to the free curved surface Divided into two sides, the curvature of one side curved surface is slower than the other side curved surface, so that the light is deflected by the lens to the side surface of the light exiting surface with a gentle curvature change. The light incident surface includes at least two quadric surfaces or at least one free curved surface shaped as the light exiting surface to provide a side-lighting light distribution toward the road surface in a forward direction and a downward direction. It should be noted that, preferably, the area of the curved surface on which the curvature changes gently on the light-emitting surface is greater than or equal to the surface of the other side, so that most of the light output can be deflected toward the curved surface with a gentle curvature change. Especially when the area of the curved surface on which the curvature changes gently on the light-emitting surface is larger than the surface of the other side, the deflection effect is extremely remarkable. Those skilled in the art should understand that the area Modifications and variations of the manner of the invention are intended to be included within the scope of the appended claims.

It should be noted that the light-emitting surface is a free-form surface, and those skilled in the art can set a plurality of boundary lines by modification and change, but those skilled in the art can understand that even if a plurality of boundary lines are included, there must be one such as the present invention. In the manner of the present invention, the light-emitting surface can be divided into a side surface having a gentle curvature change and a side surface having a sharp change in curvature, and the boundary line is the XOZ plane shown in FIG. The projection on the surface.

As shown in FIG. 1 and 2, the LED lamp applied to the low-level illumination includes: an end cover 1, a waterproof pad 2, a lamp body 3, an LED substrate 4, an LED light source 5, an LED lens 6, a reflector 7, and a translucent panel 8. , the shutter 9 , the LED driving power supply 10 , the electrical bracket 11 , the respirator 12 , the waterproof joint 13 , and the like.

The luminaire comprises eighteen LED light sources 5, wherein each of the six LED light sources 5 is packaged on an LED substrate 4 to form an LED light source assembly. The luminaire has a total of three LED light source components, and the LED light source components collectively provide illumination. Each of the LED light sources 5 is provided with an LED lens 6 and a reflector 7 . The LED lens 6 is fixed on the LED substrate 4 , and the reflector 7 is fixed on the LED lens 6 . The LED lens 6 covers the LED light source 5 . The reflector 7 is mounted on one side of the lens 6. Of course, the number of light sources and the arrangement of the LED light source components may be other numbers and modes. The number of the light sources and/or the LED light source components are applied in actual lamps, and are generally arranged according to a certain pitch, but the limitation is not limited. The number of light sources and/or the number of LED light source components used, the technical solution is not limited thereto.

The lamp body 3 is a constant-section tensile structure having a U-shaped structure, with reference to Figs. When the LED lamp is placed horizontally, the bottom edge of the U-shaped section has an angle with the horizontal projection of the bottom edge to cooperate with the LED lens 6 to achieve and adjust the light distribution toward the road surface in the forward direction and the downward direction.

The LED light source 5 is placed in the tensile structure of the lamp body 3 and is in thermal contact by the LED substrate 4 being in close contact with the bottom surface of the lamp body 3, wherein the thermal contact refers to a high thermal conductive material filling contact, the bottom The bottom surface on which the edge is located is the inner wall plane of the tensile structure opposite the opening of the tensile structure. The shielding plate 9 covers the LED substrate 4 to cover the bonding wires and fix them on the lamp body 3. The outer wall of the U-shaped structure of the lamp body 3 is provided with a plurality of rows of fins, and the fins are directly exposed to the outside air. Therefore, "LED light source → LED substrate → inner wall of the lamp → heat sink fins → outside the lamp body is formed inside the lamp body A good cooling channel for the boundary.

The end cover 1 is assembled on both sides of the tensile structure of the lamp body 3 to form an open cavity, wherein the lamp body 3 and the end cover 1 are connected and fixed by a screw mechanism, and the LED substrate 4, the LED light source 5, and the LED are in the cavity. The lens 6, the reflector 7, and the shutter 9 are provided. The light transmissive panel 8 is mounted on the lamp body 3 to cover the open cavity, so that the light transmissive panel 8 and the lamp body 3 and the end cap 1 enclose the inside of the lamp body into a closed cavity.

The end caps have mounting members that differ in position and/or direction of attachment, such as connection holes, to accommodate in-line or suction-mounted installations. Specifically, a hole is formed in the end cover 1 in the direction of the side of the light-transmitting panel 8 to accommodate the embedded mounting; a hole is formed in the end cover 1 in a direction perpendicular to the light-transmitting panel 8 to accommodate the suction mounting. The LED driving power source 10 is disposed outside the heat radiating fin of the outer wall of the lamp body 3, and is connected and fixed to the lamp body 3 by the electric device bracket 11.

In addition, the embodiment is an outdoor application lamp, and a waterproof structure such as a waterproof pad, a waterproof joint, a sealant, or the like is added, for example, the respirator 12 and the waterproof joint 13 are assembled on the upper side of the lamp body 3 adjacent to the LED driving power source 10, so that The overall protection level is not less than IP65. A waterproof pad 2 is provided at the junction between the end cap 1 and the lamp body 3; the joint between the translucent panel 8 and the end cap 1 and the lamp body 3 is sealed with a sealant.

In the material part of the whole lamp, all the materials of the exposed structure have certain corrosion resistance and aging resistance. The lamp body 3釆 is extruded with high-quality aluminum alloy material, which has strong structure, good shock resistance and good heat dissipation effect; the end cover 1 is made of high-quality aluminum alloy die-casting, high structural strength, convenient installation and strong practicability; The panel 8 is made of high-strength textured tempered glass, which effectively suppresses glare, has high structural strength and strong resistance to strain. The inner surface of the translucent panel 8 is striped or cloth or frosted to further reduce the glare of the lamp; The white plastic injection molding has higher rate, the outer surface and the inner surface are treated differently to reduce glare and light pollution, and the light utilization efficiency is improved; the LED lens 6 is precision molded by transparent plastic with excellent optical properties, such as PMMA (polyamide) Acrylate or PC (polycarbonate) plastic with precise light distribution and high light transmittance.

As shown in FIGS. 2 and 3, an LED light source 5, an LED lens 6 matched with the LED light source 5, and a reflector 7 disposed on the side of the LED lens 6 are assembled into an LED light source unit, and a plurality of LED light source units are arranged in an array. The cloth can be obtained with an LED light source assembly. The structural shape of the LED light source 5 is not limited. The LED lens 6 is left with a card position, and the reflector 7 is placed in the card position, or may be reversed. The emitter 7 and the LED lens 6 are fixed to the LED substrate 4 together with screws.

As shown in Fig. 4, a plurality of LED light source units are mounted on the same LED substrate 4, thereby obtaining an LED light source unit. The LED light source 5 is mounted on the LED substrate 4, and the LED lens 6 and the LED reflector 7 are closely assembled by the snaps. The LED lens 6 is mounted on the LED substrate 4 and covers the LED light source 5 to assemble the LED lens 6, the LED reflector 7, the LED light source 5, and the LED substrate 4.

The implementation of the LED light source unit consisting of the LED light source 5, the LED lens 6 and the reflector 7 is discussed in detail below.

First, the LED lens 6 will be described. In order to provide a better exiting optical path, increase the light energy utilization rate of the road surface and the longitudinal and lateral illumination of the road surface, the LED lens 6 has a concave light incident surface for the light source to enter and a light output for the light. The light passing through the two faces is deflected in a specified spatial direction by designing different axial structures of the light surface and the light incident surface. In general, it can be implemented by the following two schemes:

In a first aspect, the light incident surface includes at least two quadric surfaces, the curved surfaces are arranged side by side, and a curvature of the curved surface changes monotonously along an arrangement direction of the curved surface; the light emitting surface is a free curved surface having a boundary line Dividing the free-form surface into two sides of the size, the curvature of the curved surface having a larger area is slower than the curved surface having a smaller area; thereby making the light passing through the lens to the curved surface having the smallest curvature on the light-incident surface and the light-emitting surface a curved surface with a gentle curvature on the surface;

Wherein, when the lens covers the light source, the central axis of the light incident surface (ie, corresponding to the Z axis in the following embodiment) should be ensured to pass through the light source position (ie, equivalent to 0 in the following embodiment). The dividing line is a direction parallel to the arrangement of the quadric surfaces on the light-incident surface (the arrangement direction is equivalent to the X-axis direction in the following embodiment, and when it is a plurality of quadric surfaces, the arrangement is also a projection of the plane along the central axis of the light incident surface (ie, the XOZ plane) on the light exit surface in the X-axis direction; the lens may be integrally formed according to the desired deflection direction of the outgoing light. The projection direction of the curvature of the free-form surface on the light-emitting surface has a corresponding angle between the projection on the horizontal plane (i.e., the Y-axis direction in the following embodiment) and the arrangement direction of the quadric surface on the light-incident surface.

In the second aspect, the light-emitting surface is a free-form surface, and the boundary surface divides the free-form surface into two sides of the size, and the curvature of the curved surface of the larger area is slower than the curved surface of the smaller area; the light-incident surface includes At least one free-form surface shaped as the light-emitting surface, such as a plurality of the free-form surfaces, the self The potential is consistent (that is, each free-form surface has a larger surface area on the same direction side in the direction of arrangement and a gentle curvature change, and the surface of the other direction side has a smaller area and a rapid change in curvature); The lens is deflected toward the light-incident surface on the side where the curvature of the curved surface changes gently and the curved surface on which the curvature changes gently on the light-emitting surface;

Wherein, when the lens covers the light source, the central axis of the light incident surface (ie, corresponding to the Z axis in the following embodiment) should be ensured to pass through the light source position (ie, equivalent to 0 in the following embodiment). The dividing line is a trend direction parallel to the curvature of the free-form surface on the light-incident surface (when the surface is arranged as a plurality of free-form surfaces, which is equivalent to the X-axis direction in the following embodiment) a projection of a plane including a central axis of the light incident surface on the light exiting surface; when the lens is integrally formed, the direction of curvature of the free curved surface on the light exiting surface may be changed in a horizontal direction according to a desired direction of deflection of the outgoing light The projection (i.e., corresponding to the γ-axis direction in the following embodiment) has a corresponding angle with the trend direction of the curvature change of the free-form surface on the light-incident surface.

Since the two main implementations are the same in principle, the following description is only taken as an example in which the concave concave surface includes two quadric surfaces in the first embodiment, and other implementation manners, such as the concave concave surface, include multiple times. The structure of a surface or at least one free-form surface is no longer described. Further, the above-mentioned angle may be set according to the need of the optical path deflection. In the embodiment of the present embodiment, for the convenience of description, only the X-axis and the Y-axis are described at an angle of 90 degrees, but the present embodiment is not limited thereto.

The LED lens 6 will be described by taking the concave surface of the first embodiment as including two quadric surfaces as an example.

For convenience of the following description, a stereo rectangular coordinate system is introduced here, as shown in FIGS. 5a and 5b, wherein the X axis corresponds to the width direction of the LED lens 6 (ie, the left and right direction), and the Y axis corresponds to the length direction of the LED lens 6 ( That is, the front-rear direction), the Z-axis corresponds to the height direction of the LED lens 6, that is, the up-and-down direction, and the Z-axis is also the optical axis of the LED light source 5. Based on the optical axis (Z-axis) of the LED light source 5, the LED lens 6 is disposed on the LED light source 5, and the central axis of the concave concave surface of the LED lens 6 coincides with the optical axis of the LED light source 5, that is, the LED lens The central axis of the concave concave surface of 6 is also the Z axis. The peripheral structure other than the light incident surface and the light exiting surface of the lens can be changed to fix the reflector.

Figure 6 is a side view of the LED lens 6 of the present invention, with reference to Figure 6c, where la is light Face, but the illuminating surface la is not a whole spherical surface like the traditional lens illuminating surface, nor is it smoothed by multiple curved surfaces. This surface is fitted to a curve by multiple discrete points (generally called The busbar is converted to a curved surface, in fact it is a freeform surface. Referring to Figures 6a, 6b and 6c, the light exiting surface la is symmetrical about the Y axis. Centering on the origin, the intersection line between the plane formed by the X-axis and the Z-axis and the light-emitting surface la is defined as a boundary line. The light-emitting surface is divided into two parts by the boundary line, and the surface of the Y-axis has a large curved surface area and a curvature change. Slower, the surface area of the Y-axis negative direction is smaller and the curvature changes faster. The purpose of this is to make the light as far as possible to the positive half-axis of the Y-axis, that is, to the driving direction (see Figure 10a). However, it should be understood by those skilled in the art that the light-emitting surface is divided into two portions having the same area by the boundary line, and the present invention can also be realized to make the light as far as possible to the positive half-axis of the Y-axis. The present invention is not limited thereto.

As shown in FIGS. 6a, 6b and 6c, in the cross section in the Y direction, when light of any angle is incident on the light incident surface of the LED lens 6, the angle of the light entering the LED lens 6 is smaller than the incident light, that is, the light entering the light faces the light. It acts as a slight divergence toward the positive side of the Y-axis.

For the light exit surface, when the light travels to the light exit surface, the light is transmitted from the medium to the air, so the exit angle is larger than the incident angle (this incident angle is the exit angle of the light incident surface), and is located on the left side of the central axis (the positive side of the Y axis). The surface of the curved surface with a slow curvature changes is large, so that it can be completely ensured that most of the light is deflected toward the positive side of the Y-axis by the curvature of the curved surface with a slow curvature change, and is slightly diverged.

Note that the center axis (dotted line) of the concave concave surface coincides with the optical axis (dotted line) of the light-emitting diode.

The light incident surface in FIG. 6 is formed by smoothly connecting two quadric surfaces 2a and 2b having different curvatures in the direction of the X axis. Referring to FIGS. 6d and 6e, the light incident surface is symmetric about the X axis and is in the positive direction of the X axis. The curvature of the curved surface 2b is smaller than the curved surface 2a in the negative direction of the X-axis. The purpose of this is to make the light as far as possible to the negative half-axis of the X-axis, that is, the light is deflected downward and directed toward the road surface (see Fig. 10b).

When light is transmitted from the air to the medium, its exit angle is smaller than the incident angle. As shown in FIG. 7a, in the cross section of the light incident surface 61 in the X direction, light of any angle emitted from the LED light source is incident on the light incident surface 61 of the LED lens 6. The curved surface having a small curvature on the light incident surface 61 (the quadratic surface of the light incident surface) is located on the positive side of the X-axis, and the normal direction of any point on the upper side points to the upper left side (the positive side of the X-axis), and the light passes through the curved surface. Deflection to the negative side of the X-axis; and most of the surface on the quadratic surface is the curved surface 611 with a small curvature (as circled in Figure 7a), so that most of the light The line is deflected toward the negative side of the X-axis.

When light is transmitted from the medium to the air, the exit angle is greater than the angle of incidence (this angle of incidence is the exit angle of the incident surface). As shown in Fig. 7a, in the cross section of the light-emitting surface 62 along the X direction, most of the outgoing light rays on the left side of the central axis (i.e., the chain line in Fig. 7a) are more deflected toward the negative side of the X-axis, the central axis. Most of the outgoing light on the right side is deflected more toward the positive side of the X-axis. In general, the outgoing light on the right side of the central axis deflects more than the outgoing light on the left side of the central axis; overall, the light-emitting surface 62 passes through the LED. The outgoing light of the lens 6 has an effect of slightly gathering toward the central axis. As shown in FIG. 7b, in the cross section of the light-emitting surface 62 in the Y direction, the surface of the curved surface on the left side of the center axis (ie, the dotted line in FIG. 7b) (the positive side of the Y-axis) changes slowly, so that the surface area is large, so Most of the light is deflected toward the positive side of the Y-axis by a curved surface with a slow curvature change, and is slightly divergent.

Since the luminaire is suitable for low installation heights of less than 1.5 meters, the LED lens 6 should be designed so that the deflection angle of the outgoing light should not be too large, otherwise the entire road surface may not be illuminated. Based on the above features, the LED lens 6 integrates the light emitted by the LED light source 5 by means of refraction and total reflection, and redistributes the light path of the emitted light. Most of the light is emitted in the direction of the vehicle (see Figure 10a), and at the same time, the light must be deflected towards the road side in the vertical road plane to facilitate more light being projected onto the road (see Figure 10b).

The LED lens 6 can be rotated at an appropriate angle according to actual needs. Generally, the Y-axis direction of the LED lens 6 of each LED light source unit is at an angle of 5 to 10 degrees with the arrangement direction of the LED light source unit of the entire LED light source unit. As shown in Figure 8, this angle is adjusted according to the installation distance of the luminaire. The LED lens 6 and the LED reflector 7 are used together to provide a better exit path, which increases the light energy utilization of the road surface and the longitudinal and lateral illumination uniformity of the road surface.

Next, the reflector 7 will be described. As shown in FIGS. 9a and 9b, the reflector 7 is mounted on the LED lens 6 and is located on the curved side of the Y-axis negative direction side of the light-emitting surface of the LED lens 6, the latch of the reflector 7 and the card slot of the LED lens 6. Close cooperation makes it easy to assemble the product.

In order to reduce glare and light pollution, the inner surface of the reflector 7 (ie, the reflecting surface of the reflector 7 facing the LED light source 5 and the LED lens 6) is a quadric or free-form surface, and a high reflectivity material can be plated to obtain a specular reflection effect or Diffuse reflection effect, if white plastic with high reflectivity is used, the inner surface can be left untreated. Its function is to reflect the light in the negative direction of the Y-axis (the smaller surface of the lens exit surface) to the positive direction of the Y-axis. This part of the light will exit in the driving direction, which not only reduces the glare but also greatly increases the glare. High utilization efficiency of light energy.

For the arrangement of the plurality of LED light source units of FIG. 8, the outer surface of the reflector 7 (ie, the back of the reflector 7 remote from the LED light source 5 and the LED lens 6) may emit light to the LED light source unit arranged behind it. Causes reflection, which causes unfavorable factors such as glare. In order to reduce or weaken such disadvantages, the outer surface of the reflector 7 must be etched or matte to dissipate light from the latter LED source unit to the outer surface, but the outer surface has no fixed shape. . Of course, if the distance between the LED light source units of the luminaire is large enough, it is not necessary to do the etching or sanding.

In addition, referring to Fig. 10a, in the top view along the road direction, the light emitted by the LED lamp is illuminated as far as possible in the driving direction. The arrow pointing in Fig. 10a is the driving direction, and the distance of the illumination is close to the distance between the two lamps; and it is important to avoid the light. Reverse injection to prevent exposure to the driver's eyes, causing glare and other unfavorable factors; In addition, referring to Figure 10b, in the direction of the vertical road, the light emitted by the luminaire can shine as much as possible on the road surface, and the distance illuminated in this direction is close to the road. The width. The LED luminaires are used in pairs in general, that is, they are installed on the left and right sides of the road. The two LED luminaires installed in the opposite direction are different from the light incident surface of the lens of the LED light source assembly (the shapes of the light incident surfaces are opposite), and the rest are the same, and the assembly and fixing methods are also the same. In order to facilitate assembly, the body of the LED lens 6 can also be modified. The structure only needs to clamp the LED lens 6 on the LED substrate 4, which is convenient to operate and greatly improves assembly efficiency.

The above description shows and describes several preferred embodiments of the present invention, but as described above, it should be understood that the invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. The modifications and variations of the present invention are intended to be within the scope of the appended claims.

Industrial applicability

Through the above configuration, the present invention solves the problem that it is not suitable to install conventional pole type road lamps in applications such as ramps, viaduct roads, general bridges, interchanges, auxiliary roads, temporary stops, etc., and specializes in designing for these special application environments. , structural design, light distribution design; Special application environment specializes in designing various installation methods, such as embedded installation, suction-mounted installation, etc.; good heat dissipation design for different installation methods; directional emission and gathering of light, greatly improving the utilization efficiency of light energy In practical applications, along the direction of the road, the light emitted by the luminaire should be illuminated as far as possible along the driving direction. The distance of the illumination is close to the distance between the two lamps; and it is important to prevent the light from being emitted backwards to prevent the driver from shining into the eyes. In addition, in the direction of the vertical road, the light emitted by the luminaire can be illuminated as much as possible on the road surface. The distance illuminated in this direction is close to the width of the road, providing a better exit light path and increasing the light energy of the road surface. Utilization rate and longitudinal and lateral illumination uniformity of the road surface; The technical solution has reasonable structural design, high-intensity lamp body structure, excellent heat dissipation effect, diversified installation mode, precise light distribution design, and efficient light transmittance utilization. , to ensure that the luminaire can work in a severe and special outdoor environment, with better optical response Performance.

Claims

Claim

1. An LED light source assembly for low-level illumination, characterized in that

The method includes: a plurality of arrayed LED light source units mounted on the same LED substrate; wherein

The LED light source unit includes: a light source and a lens disposed on the light source, wherein the lens has a concave light incident surface on which light from the light source is incident and a light exit surface on which the light is emitted, the light exit surface a free-form surface having a boundary line dividing the free-form surface into two sides, and the curvature of one side curved surface is slower than the other side curved surface, so that the curvature of the light passing through the lens toward the light-emitting surface is gentle. The side surface is deflected.

2. The LED light source assembly of claim 1 wherein:

The area of the one side curved surface whose curvature changes gently is greater than or equal to the other side curved surface.

3. The LED light source assembly of claim 1 wherein:

The light incident surface includes at least two quadric surfaces, the curved surfaces are arranged side by side, and the curvature of the curved surface monotonously changes along the arrangement direction of the curved surface, so that the light has a minimum curvature to the light incident surface through the lens. a curved surface side deflection; wherein a central axis of the light incident surface passes through the light source position; the boundary line is an alignment direction parallel to the secondary curved surface of the light incident surface, and a plane including the central axis is on the light emitting surface The projection on the surface of the free-form surface of the illuminating surface has an angle between the projection of the trend direction on the horizontal plane and the arrangement direction of the quadric surface on the light-incident surface.

4. The LED light source assembly of claim 1 wherein:

The light incident surface includes at least one free curved surface shaped as the light emitting surface. When a plurality of the free curved surfaces are included, the free curved surfaces are arranged side by side, and the curvature of each free curved surface changes along the direction of the free curved surface. Consistently, the light is deflected by the lens to a side of the light incident surface that is gently changed by the curvature of the curved surface; wherein a central axis of the light incident surface passes through the light source position; the boundary line is a parallel a direction of the curvature of the free-form surface on the light-incident surface and a projection of the plane of the central axis on the light-emitting surface; a projection of the trend direction of the curvature of the free-form surface on the light-emitting surface on the horizontal plane and the input There is an angle between the trend direction of the curvature of the free-form surface on the smooth surface.

5. The LED light source assembly of claim 3 or 4, wherein The lens cover is disposed on the light source such that a central axis of the light incident surface coincides with an optical axis of the light source, and the included angle is 90 degrees.

6. The LED light source assembly of claim 3 or 4, wherein

The method further includes: a reflector disposed on a side of the curved surface having a large curvature change on the light-emitting surface of the lens, and reflecting the light emitted from the curved surface to the other side; the lens is provided with a card position, and the reflector is placed at the In the card position; or the reflector is fixed together with the lens on the aluminum substrate or the heat sink of the light-emitting component.

7. The LED light source assembly of claim 3 or 4, wherein

The reflecting surface of the reflector is a quadric surface or a free curved surface, and the high reflectivity material is plated to obtain a specular reflection effect or a diffuse reflection effect; the outer surface of the reflector is etched or frosted to disperse other illumination components. Light to the outer surface.

8. The LED light source assembly of claim 3 or 4, wherein

The plurality of LED light source units on the LED light source assembly are arranged in a line; the lens is rotated such that a trend direction of a curvature of a free curved surface on a light exit surface of the lens of the LED light source unit has an angle with the alignment direction of the straight line.

An LED lamp for low-level illumination, comprising: at least one LED light source component; the LED light source component further comprising: a plurality of arrayed LED light source units mounted on the same LED substrate The LED light source unit further includes: a light source and a lens disposed on the light source, wherein the lens has a concave light incident surface on which light of the light source is incident and a light exit surface on which the light is emitted. The light-emitting surface is a free-form surface, which has a boundary line dividing the free-form surface into two sides, and the curvature of one side curved surface is slower than the other side curved surface, so that the curvature of the light passing through the lens to the light-emitting surface is gentle. One side of the surface is deflected.

10. The LED lamp of claim 9, wherein

11. The LED lamp of claim 9, wherein

The light incident surface includes at least two quadric surfaces, the curved surfaces are arranged side by side, and the curvature of the curved surface monotonously changes along the arrangement direction of the curved surface, so that the light has a minimum curvature to the light incident surface through the lens. Curved side deflection; wherein a central axis of the light incident surface passes through the light source position; the boundary line is a plane parallel to the arrangement direction of the quadratic surface on the light incident surface and the plane including the central axis is Projection on the light-emitting surface; the direction of the curvature change of the free-form surface on the light-emitting surface is at an angle to the direction of the arrangement of the quadric surface on the light-incident surface.

12. The LED lamp of claim 9, wherein

The light incident surface includes at least one free curved surface shaped as the light emitting surface, such as a plurality of the free curved surfaces, the free curved surfaces are arranged side by side, and the curvature of each free curved surface changes in a direction along the direction of the free curved surface. Thereby, the light is deflected by the lens to a side of the light incident surface which is gently changed by the curvature of the curved surface; wherein a central axis of the light incident surface passes through the light source position; the boundary line is parallel to a direction of the change in the curvature of the free-form surface on the light-incident surface and a projection of the plane of the central axis on the light-emitting surface; a projection of the trend direction of the curvature of the free-form surface on the light-emitting surface on the horizontal plane and the incident light There is an angle between the trend direction of the curvature of the free surface on the surface.