CN101520143A

CN101520143A - Led street lamp

Info

Publication number: CN101520143A
Application number: CN200810082702A
Authority: CN
Inventors: 朱伯明; 陈海军; 孙建江
Original assignee: NINGBO LIAOYUAN LIGHTING CO Ltd
Current assignee: NINGBO LIAOYUAN LIGHTING CO Ltd
Priority date: 2008-02-27
Filing date: 2008-02-27
Publication date: 2009-09-02
Also published as: WO2009105924A1

Abstract

The invention relates to an LED street lamp applied to roadways, tunnels and other places where the requirement on illumination uniformity is higher. The LED street lamp comprises a light distribution system, a heat sink, a lamp body, a driving circuit and a light fixture installation adjusting mechanism; LED luminescence units are installed on one side of the light distribution system; the axial direction of each LED luminescence unit points at each zone of an object; the LED street lamp is also provided with an optimal optical system required by street illumination light distribution; power supply is controlled by the driving circuit in a shunt control way after the LED luminescence units are connected in series and in parallel; the heat sink is arranged on the other side of the light distribution system, thereby each LED luminescence unit can be ensured to be operated under normal temperature; and by installing the adjusting mechanism and a horizontal alignment device, the problem of ray offset as the position of the light fixture is not in place during the installation of the light fixture can be overcome.

Description

LED street lamp

Technical Field

The invention relates to a street lamp in the field of illumination, in particular to an LED street lamp which is suitable for a main road, a secondary road and the like and needs large area and has higher requirements on illuminance and illuminance uniformity. The LED light-emitting units are arranged on one surface of the light distribution system, the axis direction of each LED light-emitting unit points to each area of an illumination target, the optimal optical system required by road illumination light distribution is provided, the plurality of light-emitting units are controlled by a driving circuit in a shunt way to supply power after being connected in series and in parallel, the radiator is arranged on the other surface of the light distribution system, the LED light-emitting units are guaranteed to work at normal temperature, the problem of uneven light distribution caused by inaccurate positions during lamp construction and installation can be solved through the installation adjusting mechanism, the LED light-emitting units become a novel design with practicability and progress, and the LED light-emitting units are suitable for wide popularization and application in the industry.

Background

Although the existing LED street lamps have the characteristics of long service life, good light color and the like compared with the conventional lamps, the required illuminance and light distribution uniformity for road illumination under the same street lamp arrangement condition cannot meet the requirements, for example, in the lamps disclosed in chinese patent No. 200520062069.3 or 200510112612.0 or 20071002565.X, one or more LED units are adopted to project light through simple array arrangement, but when the LED light sources with the same optical characteristic are irradiated to a certain direction or area in parallel, the local area brightness is too high, which not only affects the uniform illumination effect on the road, but also cannot make the light emitted by the light sources obtain efficient utilization. Because the street lamps have certain range requirements for height, spacing, inclination angle, road effective width and the like during installation, and because most of the existing road lamps are installed near the side line of the road, the light emitted by the lamps is required to cover the whole road surface and provide local illumination within 5 meters around the road, the lamps disclosed by the Chinese patent (patent number 200520062069.3 or 200510112612.0 or 20071002565.X) do not fully consider the characteristics of light distribution required by the road lamps, so that the overall uniformity is reduced.

Therefore, it is obvious that the above-mentioned conventional LED street lamp still has inconvenience and defects in structure and use, and further improvement is needed. In order to solve the problems of the LED street lamps, related manufacturers have tried to solve the problems without diligent attention, but it has not been known that suitable designs are developed and completed for a long time, and general products have no suitable structure to solve the problems, which is obviously a problem that related manufacturers want to solve. Therefore, how to create a new structure LED street lamp with a large illumination area and uniform illumination light according to the road light distribution characteristics is one of the important research and development issues, and is also an object of great improvement in the industry at present.

In view of the above-mentioned defects of the existing LED street lamp, the inventor of the present invention has made extensive practical experience and professional knowledge for many years based on the design and manufacture of such products, and has actively studied and innovated in cooperation with the application of theory, so as to create a new structure of LED street lamp, which can improve the existing LED street lamp and make it more practical. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.

Disclosure of Invention

The invention aims to overcome the defects of the existing LED street lamp, and provides an LED street lamp with a novel structure, aiming at solving the technical problem that the installation quantity, height, power, average illumination, overall uniformity and other parameters of the street lamp are strictly required, so that the LED street lamp fully exerts the characteristics of directional light emitting and controllable power of an LED light source, makes corresponding adjustment according to the change of road conditions, effectively illuminates the road surface, achieves uniform light distribution, and can reduce the power consumed by the whole LED street lamp under the condition of meeting the illumination level and uniformity required by road illumination. Thereby being more practical and having industrial utilization value.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The LED street lamp provided by the invention comprises a light distribution system, a heat dissipation device, a lamp body, a driving circuit and a lamp installation adjusting mechanism. The light distribution system is fixed on the lamp body, the driving circuit is installed in the cavity of the lamp body, and the driving circuit is connected with the LED light emitting unit of the light distribution system through a lead. Each LED light-emitting unit of the light distribution system respectively irradiates to a point on each area of a road surface, and each incident point corresponds to each LED light-emitting unit on the LED light distribution system. The optical axis direction, the luminous intensity and the luminous angle range of each LED luminous unit are determined according to the distance from the LED luminous unit to an incident point and the incident angle, light rays incident to each small area form a far light area, a middle light area and a near light area, the corresponding LED luminous units form a plurality of lighting modules according to the incident angle and the luminous intensity, and the lighting modules are fixed on the corresponding positions of the light distribution system, so that each LED luminous unit has an optimal optical system required by road lighting light distribution.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the LED street lamp, an included angle between a central axis of at least three LED light emitting units of the light distribution system and a central axis of each adjacent LED light emitting unit is 5 ° to 40 °.

In the LED street lamp, the light distribution system at least includes an LED lighting unit formed by three light intensities and corresponding beam angles.

The purpose of the invention and the technical problem to be solved are also realized by adopting the following technical scheme. According to the LED street lamp provided by the invention, at least two LED light-emitting units in the light distribution system respectively irradiate towards the two sides of the lamp along the longitudinal direction of the road and towards the road surface area which is farthest away from the lamp, and at least one LED light-emitting unit in the light distribution system irradiates towards the road surface area which is closest to the lamp, namely the vicinity of the lower point of the lamp.

The purpose of the invention and the technical problem to be solved are also realized by adopting the following technical scheme. According to the LED street lamp provided by the invention, the light distribution system is provided with at least two LED light-emitting units which respectively irradiate towards the middle area of the road surface along the longitudinal direction of the road towards the two sides of the lamp.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures. In the LED street lamp, an included angle between a central axis of the LED light emitting unit which irradiates the road surface area farthest from the lamp and the road surface is 15 ° to 40 °, and the light emitting intensity is the largest among all the LED light emitting units; the central axis of the LED light-emitting unit irradiating towards the road surface area closest to the lamp, namely the vicinity of the lower point of the lamp, forms an included angle of 55-90 degrees with the irradiation plane, and the light-emitting intensity is the smallest in all the LED light-emitting units.

In the LED street lamp, the LED light emitting units respectively irradiating towards the middle area of the road surface along the longitudinal direction of the road towards the two sides of the lamp have an included angle of 40 ° to 55 ° between the central axis and the road surface, and the light emitting intensity is medium in all the LED light emitting units.

The purpose of the invention and the technical problem to be solved are realized by the following technical scheme. According to the LED street lamp provided by the invention, one surface of the light distribution system for fixing the LED light-emitting unit is provided with the reflector, and the positions of the reflector and the LED light-emitting unit, which correspond to each other, are provided with the openings.

In the LED street lamp, the light outlet surface of the light distribution system is provided with the transparent curved surface or the transparent plane cover.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the LED street lamp provided by the invention, the back surface of the light distribution system is provided with the heat dissipation device.

In the LED street lamp, the heat dissipation device is configured such that the separated heat dissipation modules are installed on the back surface of the light distribution system and correspond to the LED light emitting units, respectively.

The heat dissipation device and the light distribution system are cast into a whole.

The LED street lamp is characterized in that the light distribution system is provided with a heat dissipation breathing hole.

In the LED street lamp, the driving circuit has at least three independent constant current outputs for respectively controlling the respective LED light emitting units.

In the LED street lamp, the driving circuit automatically switches the power supply to control the output power after receiving the illuminance signal or the time signal or other control signals.

In the LED street lamp, the lamp body is provided with the mounting adjustment mechanism, and the elevation angle of the lamp relative to the irradiation surface is adjusted to-15 ° - +15 ° by adjusting the fixing position of the lamp mounting seat 51 and the mounting tube. The mounting tube is fixed at any position in the mounting seat according to requirements so as to obtain different irradiation elevation angles.

In the LED street lamp, a leveling platform for determining a mounting inclination angle of the lamp is disposed on the upper portion of the lamp body.

The invention discloses an LED lamp used in the occasions of roads, tunnels and the like with higher requirements on illumination uniformity, which comprises a light distribution system, a heat dissipation device, a lamp body, a driving circuit and a lamp installation adjusting mechanism, wherein one surface of the light distribution system is provided with an LED light-emitting unit, the axis direction of each LED light-emitting unit points to each area of an illumination target, the LED light-emitting unit is provided with an optimal optical system required by road illumination light distribution, the plurality of light-emitting units are controlled by a light distribution driving circuit in a shunt way to supply power after being connected in series and in parallel, the other surface of the light distribution system is provided with a radiator to ensure that each LED light-emitting unit works at normal temperature, and the problem of uneven luminosity distribution caused by inaccurate positions during lamp construction and installation can be.

According to the LED street lamp provided by the invention, in order to meet the requirements of road surface illumination and uniformity, an LED light distribution system needs to be designed. The area to be illuminated is divided into a plurality of small areas, the central incident point of light is set in each small area, each incident point corresponds to each LED luminous unit on the LED light distribution system, the optical axis direction, the luminous intensity and the luminous angle range of each LED luminous unit are determined according to the distance from the LED luminous unit to an incident point and the incident angle, light rays incident to each small area form a far light area, a middle light area and a near light area, the corresponding LED luminous units form a plurality of lighting modules according to the incident angle and the luminous intensity, the lighting modules are fixed to corresponding positions of the light distribution system, the incident angle of the far light area is generally between 50 degrees and 75 degrees, the incident angle of the middle light area is generally between 35 degrees and 50 degrees, the incident angle of the near light area is generally between 0 degrees and 35 degrees, and the mutual ratio of the maximum light intensity of the LED luminous units irradiating different areas is about 2 times.

The LED street lamp light distribution system is suitable for various road lighting environments, the road surface is divided into three types of large, medium and small according to the current road grade and the related specified division of road lighting, the incidence angle and the incidence point of each LED light-emitting unit of the light distribution system can be changed within a certain range according to the size of the illumination area, the adjustment is carried out within the angle range to form the light area as before, the required total luminous flux is changed due to the change of the illumination area, the total luminous flux is reduced as long as the power of each LED light-emitting unit is correspondingly reduced, but the light distribution characteristics are not changed, so the LED street lamp light distribution system can be suitable for various road lighting.

The LED street lamp light distribution system is arranged on the installation frame of the lamp body, the light outlet surface is sealed by the curved surface or the plane light-transmitting cover, the radiator at the back of the light distribution system directly radiates heat outwards, the LED light-emitting unit has the characteristic of directional light emission, the effective width and the installation distance of an applied road are different, the lamp installation adjusting mechanism is arranged on the lamp body, the illumination coverage range of the LED street lamp can be well controlled, and the phenomenon of light deviation caused by the fact that the LED street lamp is not installed in place can be eliminated.

In order to reduce the total energy consumption of the lamp, a control signal can be added into the driving circuit according to factors such as traffic density, time interval, ambient light and the like. Due to the adoption of the light distribution system, when the illumination requirement is reduced on the same road section, the output current is reduced by reducing the input power, the luminous flux of the LED light-emitting unit is reduced, the total energy consumption is reduced, and the illumination uniformity is not reduced.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the LED street lamp provided by the invention can achieve considerable technical progress and practicability, has wide industrial utilization value, and at least has the following advantages:

1. the LED street lamp provided by the invention utilizes the method of enabling each LED luminous unit to irradiate each region by using the uniquely designed light distribution system, the light rays emitted by the LED luminous units are projected to each region of an illuminating road surface, the light beam angles and the light intensities of all the LED luminous units are controlled, the light rays emitted by the whole light distribution system meet the requirement of road illumination, the overall illumination uniformity is more than 0.4, and the longitudinal uniformity is more than 0.6, so that the cost can be greatly reduced, the economic benefit is improved, the practicability and the cost benefit of use are really and completely met with the requirement of industrial development, and the industrial utilization value is quite high.

2. According to the LED street lamp, the light beam angle, the incident angle and the luminous intensity of the corresponding LED luminous units can be adjusted according to the installation height of the LED street lamp and the distance and the number between the lamps, light rays emitted by the LED luminous units are intensively projected onto a road surface to be illuminated, and the effective utilization rate of the light rays is improved;

3. according to the LED street lamp provided by the invention, the heat dissipation problem of the LED light source can be solved by arranging the heat dissipation device on the other surface of the mounting seat;

4. according to the LED street lamp, the driving circuit of the independent channel is used for carrying out output control on the LED light-emitting unit, and the total power of the LED street lamp is controllable through an external control signal without influencing the change of the illumination uniformity;

5. the LED street lamp provided by the invention is provided with the angle adjusting mechanism during the installation of the LED lamp, and is suitable for different road lighting widths;

6. the LED street lamp provided by the invention is also provided with the horizontal calibration device when the LED lamp is installed, so that the problem of light ray deviation caused by the fact that the LED lamp cannot be installed in place is avoided.

7. The invention can really achieve the practical efficacy, is convenient to use, does not need complicated procedures, has more convenient and simple structure forming processing, accords with the cost benefit, really has industrial utilization value, and is suitable for wide popularization and use in the industry.

8. The structure of the invention is more technically progressive than the existing LED street lamp, and the unique structural characteristics and functions are far from the comparison with the existing LED street lamp, thus having a plurality of enhanced effects compared with the existing LED street lamp and having technical progress.

9. The LED street lamp is more practical in use, can meet the requirements of users on LED street lamp products, can give consumers better choices, and can greatly improve the overall benefit, thereby being more practical.

In conclusion, the novel LED street lamp effectively illuminates the road surface, achieves uniform light distribution, and can reduce the power consumed by the whole LED street lamp under the condition of meeting the illumination level and uniformity required by road illumination. The invention has the advantages and practical value, has great improvement on the structure or function of the product, has obvious progress in technology, produces good and practical effect, has a plurality of enhanced and outstanding effects compared with the prior LED street lamp, is more suitable for practical use, has industrial wide utilization value, and is a novel, advanced and practical new design.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of embodiment 1;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is an enlarged view of the level platform;

FIG. 6 is a schematic view of the light emitting unit shining on a road surface;

fig. 7 is a light distribution graph of the first embodiment;

FIG. 8 is a road surface isophote map of the first embodiment;

FIG. 9 is a block diagram of a drive circuit;

FIGS. 10a-10b are schematic structural views of the second embodiment;

FIGS. 11a-11b are schematic structural views of a third embodiment;

FIG. 12 is a light distribution graph of the second and third embodiments;

FIG. 13 is a road surface isophotograph of the second and third embodiments;

in the figure:

1: light distribution system

11a, 11b, 11 c: light emitting unit

1a, 2a, 3 a: included angle between central axis of light-emitting unit and road surface

12: light-transmitting cover

13: the reflector 13 a: opening of reflector

2: the heat sink 21: breathing hole

3: lamp body

4: driving circuit

41 power supply input

411: input 412: filtering

413: rectification 414: PFC

415: filtering 416: light induction

417: delay adjustment 418: intelligent control

42: constant current module

421: constant current module 422: constant current module

423: a constant current module 424; constant current module

43: LED unit

431: the LED module 432: LED module

433: the LED module 434: LED module

5. Installation adjustment mechanism

51. Lamp mount 52: level platform

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the LED street lamp according to the present invention with reference to the accompanying drawings and preferred embodiments will be made to show the following detailed descriptions of the specific embodiments, structures, features and effects thereof.

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.

First embodiment

Referring to fig. 1, 2, 3, 4 and 5, an LED street lamp according to a preferred first embodiment of the present invention is mainly composed of a light distribution system 1, a heat dissipation device 2, a lamp body 3, a driving circuit 4 and a lamp installation and adjustment mechanism 5, wherein the heat dissipation device 2 (see fig. 2, 3 and 4) is disposed outside the light distribution system 1, and in order to achieve a better heat dissipation effect, the heat dissipation device 2 and the light distribution system 1 are cast into a whole, and the appearance shape may be arc or square. One side of the light distribution system is provided with the LED light-emitting units, and the other side is provided with the heat dissipation device 2, so that the LED light-emitting units can work at normal temperature. After being connected in series and in parallel, the light-emitting units are controlled by the driving circuit 4 to supply power (as shown in figures 1 and 2), the lamp body 3 is provided with the installation adjusting mechanism 5 (as shown in figures 1 and 2), and the problem of uneven luminosity distribution caused by inaccurate positions during lamp construction and installation can be solved through the installation adjusting mechanism 5. A heat dissipation breathing hole 21 (shown in fig. 2) is provided near the wire outlet on the light distribution system 1. Wherein,

the inner surface of the light distribution system 1 is formed by connecting a plurality of geometric bodies distributed in a block shape, and the geometric bodies and the central line A-A of the lamp are distributed in a bilateral symmetry way (as shown in figure 1), taking the right half part of the central line A-A as an example, the normal directions of the surfaces of the geometric bodies of the block shapes are staggered with a certain angle, and a plurality of LED light-emitting

units

11a, 11b and 11c (as shown in figure 1) with different light-emitting intensities and different light beam angles are fixed on the surface, so that the included angle between the central axis of the LED light-emitting unit 11 arranged on the surface and the central axis of the adjacent LED light-emitting unit is 5-40 degrees, and the light-emitting

units

11a, 11b and 11c can project light to the respective appointed areas. The LED light emitting units 11a have the maximum light emitting intensity, and 6 light emitting units 11a are combined into one illumination band for high beam illumination at an incident angle of 50 ° to 75 °, and they are adjacently mounted. The same approach combines 2 LED lighting units 11b with medium luminous intensity and 2 LED lighting units 11a with maximum luminous intensity to form a middle zone lighting strip with an incident angle between 35 ° and 50 °, and 1-2 LED lighting units with medium luminous intensity or wide beam angle can be used as a gap supplement between the far-beam zone and the middle zone to achieve a more uniform lighting effect. For the area with a relatively long distance from the lamp, 3 LED light-emitting units 11c with wide beam angles and small light-emitting intensity are adopted to be combined with 2 LED light-emitting units 11b with medium beam angles and medium light-emitting intensity for illumination, and the incident angle of the light-emitting units is relatively small and can be placed near the central position of the light distribution system 1, namely near the central axis A-A, and the incident angles are between 0 and 35 degrees. In order to make the whole light distribution system 1 beautiful in structure and uniform in stress, the block-shaped mounting surfaces for fixing the LED light-emitting units are connected by smooth planes or curved surfaces to form an inner surface which is roughly in a turtle shell shape. The LED lamp of the present invention has a batwing-shaped light distribution curve conforming to the road illumination as shown in FIG. 7, and FIG. 8 is an equal illuminance distribution diagram of the lamp on the road surface at the installation height of 10M. Fig. 6 shows an included angle 1a between the central axis of the light-emitting unit and the road surface, an included angle 2a between the central axis of the light-emitting unit and the road surface, and an included angle 3a between the central axis of the light-emitting unit and the road surface when the light-emitting unit irradiates the road surface.

The LED light-emitting units are connected in series and parallel by wires to form 3-4 groups, and are connected to the driving circuit 4 through wire outlets on the light distribution system 1, as shown in fig. 9, the driving circuit 4 has 4 independent outputs, the output of other groups cannot be influenced by the fault such as open circuit or short circuit of any group, and the output current of the driving circuit 4 can be controlled by photoelectric signals or clock signals, so that the automatic control function is realized for automatically turning on and off the lamp and reducing the power output of the street lamp within a certain time period. The driving circuit 4 includes a power input 41 and a constant current module 42, the power input 41 controls the constant current module 42, the constant current module 42 is connected to the LED unit 43, and the current is processed by an input 411, a filter 412, a rectifier 413, a PFC413, and a filter 415, and then is independently connected to the constant current module 421, the constant current module 422, the constant current module 423, and the constant current module 424. The constant current module 421, the constant current module 422, the constant current module 423, and the constant current module 424 are respectively connected to the corresponding LED module 431, LED module 432, LED module 433, and LED module 434 in the LED unit 43, and the light sensor 416 and the delay adjustment 417 are respectively connected to the intelligent controller and are respectively connected to the constant current module 421, the constant current module 422, the constant current module 423, and the constant current module 424.

In order to eliminate the influence of stray light of the LED light emitting unit and improve the light utilization efficiency, a light reflecting plate 13 (see fig. 2) is disposed on one surface of the light distribution system 1, on which the LED light emitting unit is fixed, an opening 13a (see fig. 1) is disposed at a position of the light reflecting plate 13 corresponding to the LED light emitting unit 11a, and meanwhile, in order to improve the protection capability of the LED light emitting unit against the environment, a transparent curved light-transmitting cover 12 (see fig. 2 and 3) is disposed on the light outlet surface of the light distribution system 1.

The light distribution system 1 is arranged on the mounting frame of the lamp body 3, the effective width and the mounting interval of the applied road can be different due to the directional light emitting characteristic of the LED light emitting unit, the deviation of the mounting angle can cause the uneven illumination of the road surface, a lamp mounting and adjusting mechanism 5 (shown in fig. 1 and 2) is arranged on the lamp body 3, and the adjusting mechanism 5 can control the elevation angle and the left-right inclination condition of the LED street lamp through the adjustment of the fixed position of the lamp mounting seat 51 and the mounting tube (shown in fig. 2), by observing a level gauge 52 (shown in fig. 2 and 3) placed on the upper portion of the lamp body, the mounting tube is fixed at any position in the mounting seat as required, the angle of the lamp in each direction can be controlled by obtaining different illumination elevation angles, and the deviation is eliminated, so that the elevation angle of the lamp relative to the setting surface is-15 degrees to-15 degrees relative to the illumination surface.

The above is only a preferred embodiment of the present invention, and the number of LED lighting units, the angle between each other and the luminous intensity and beam angle of each LED lighting unit are designed according to the lighting requirements of a specific road surface, so that those skilled in the art can make various modifications or additions to the described embodiments or substitute them in a similar manner, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Second embodiment

As shown in fig. 10a-10b, the LED street lamp according to the second preferred embodiment of the present invention comprises a light distribution system 1, a heat dissipation device 2, a lamp body 3, a driving circuit 4, and a lamp mounting adjustment mechanism 5 (as shown in fig. 10 a). The inner surface of the light distribution system 1 is formed by connecting a plurality of geometric bodies distributed in a block shape, and is distributed in bilateral symmetry with the center line a-a of the lamp (as shown in fig. 10 a), taking the right half part of the center line a-a as an example, the normal directions of the surfaces of the geometric bodies of the block shape are staggered with a certain angle, and a plurality of LED

light emitting units

11a, 11b, 11c with different light intensity and different light beam angles are fixed on the surface, so that the

light emitting units

11a, 11b, 11c all project light to respective appointed areas (as shown in fig. 10 a). The LED light emitting units 11a have the maximum light emitting intensity, and 2 light emitting units 11a are combined into one illumination band for high beam illumination at an incident angle of 50 to 75 ° and mounted adjacently. The same approach combines 1 LED lighting unit 11b with medium luminous intensity and 3 LED lighting units 11c with minimum luminous intensity to form a middle zone lighting strip with an incident angle between 35 ° and 50 °, and the high beam zone and the middle zone can be supplemented with 1-2 LED lighting units with medium luminous intensity or wide beam angle as gaps to achieve more uniform lighting effect. For the area with a relatively large distance from the lamp, 4 LED light-emitting units 11c with wide beam angle and small light-emitting intensity are adopted for illumination, and the incident angles of the light-emitting units are relatively small, so that the light-emitting units can be placed near the central position of the light distribution system 1, namely near the central axis A-A (as shown in figure 10 b), and the incident angles are between 0 and 35 degrees. In order to make the whole light distribution system 1 beautiful in structure and uniform in stress, the block-shaped mounting surfaces for fixing the LED light-emitting units are connected by smooth planes or curved surfaces to form an inner surface which is roughly in a turtle shell shape. The LED lamp of the present invention has a batwing-shaped light distribution curve conforming to road illumination as shown in fig. 12, and fig. 13 is an equal illuminance distribution diagram of the lamp on a road surface at an installation height of 8M, and the light distribution shown in fig. 12 and 13 can be realized by the arrangement of the above-described LED light emission intensity, beam angle, and corresponding projection angle. The heat dissipation device 2 is arranged outside the light distribution system 1, in order to achieve a better heat dissipation effect, the heat dissipation device 2 and the light distribution system 1 are cast into a whole, and the appearance shape can be arc-shaped or square. The LED light emitting units are connected in series and parallel by wires to form 3-4 groups, and are connected to the driving circuit 4 through the wire outlet on the light distribution system 1, as shown in fig. 9, the driving circuit 4 has 3-4 independent outputs, and any group has a fault such as open circuit or short circuit, which does not affect the outputs of other groups, and the output current of the driving circuit 4 can be controlled by a photoelectric signal or a clock signal, which has an automatic control function for automatically turning on and off the lamp and reducing the power output of the street lamp within a certain time period, and the detailed description is the same as embodiment 1.

In order to eliminate the influence of stray light of the LED light emitting unit and improve the light utilization efficiency, a reflector 13 is disposed on one surface of the light distribution system 1 where the LED light emitting unit is fixed, an opening 13a is disposed at a position of the reflector corresponding to the LED light emitting unit 11a, and a transparent curved transparent cover 12 (as shown in fig. 10a and 10 b) is disposed on the light exit surface of the light distribution system 1 to improve the protection capability of the LED light emitting unit against the environment.

The light distribution system 1 is arranged on the mounting frame of the lamp body 3, the LED light-emitting unit has the characteristic of directional light emission, the effective width and the mounting interval of an applied road are different, the deviation of the mounting angle can cause the uneven road illumination, the lamp mounting and adjusting mechanism 5 is arranged on the lamp body 1, the adjusting mechanism 5 can control the elevation angle and the left-right inclination condition of the LED street lamp, the angle of the lamp in each direction can be controlled by observing the level gauge 52 arranged on the upper part of the lamp body, and the deviation is eliminated (as shown in figure 10 b).

Third embodiment

As shown in fig. 11a-11b, the LED street lamp according to the third preferred embodiment of the present invention comprises a light distribution system 1, a heat dissipation device 2, a lamp body 3, a driving circuit 4, and a lamp mounting adjustment mechanism 5 (as shown in fig. 11 a). The heat dissipation device 2 is arranged outside the light distribution system 1, and in order to achieve a better heat dissipation effect, the heat dissipation device 2 and the light distribution system 1 are cast into a whole, and the appearance of the light distribution system is rectangular. One side of the light distribution system is provided with the LED light-emitting units, and the other side is provided with the heat dissipation device 2, so that the LED light-emitting units can work at normal temperature. The plurality of light-emitting units are controlled by the driving circuit 4 to supply power after being connected in series and in parallel, the lamp body 3 is provided with the installation adjusting mechanism 5, and the problem of uneven luminosity distribution caused by inaccurate position during lamp construction and installation can be solved through the installation adjusting mechanism 5. A heat dissipation breathing hole 21 (shown in fig. 11b) is provided near the wire outlet on the light distribution system 1. The inner surface of the light distribution system 1 is a flat surface, a plurality of substrates with different inclination angles are fixed on the flat surface, the substrates are symmetrical left and right relative to the central line a-a of the lamp (as shown in fig. 11a), and the LED

light emitting units

11a, 11b and 11c with different light emitting intensities and light beam angles are arranged on the independent surfaces, so that the

light emitting units

11a, 11b and 11c all project light to respective appointed areas (as shown in fig. 11a and 11 b). Taking the right half of the center line a-a as an example, the 2 LED light emitting units 11a have the maximum light emission intensity at their incident angles between 50 ° and 75 °. The combination of 1 LED light-emitting unit 11b with medium luminous intensity and 3 LED light-emitting units 11c with minimum luminous intensity forms an illumination band in the middle area, the incident angle is between 35 ° and 50 °, and the high beam area and the middle beam area can be supplemented by 1-2 LED light-emitting units with medium luminous intensity or wide beam angle to achieve more uniform illumination effect. For the area with a relatively large distance from the lamp, 4 LED light-emitting units 11c with wide beam angles and small light-emitting intensity are adopted for irradiation, and the incident angles of the light-emitting units are relatively small and can be placed near the central position of the light distribution system 1, namely near the central axis A-A, and the incident angles are between 0 and 35 degrees. The LED lamp of the present invention has a batwing-like light distribution curve conforming to road lighting as shown in fig. 12, and fig. 13 is an equal illuminance distribution diagram of the present lamp on a road surface at an installation height of 8M. The other structure is the same as that of embodiment 1.

The technical innovation of the LED street lamp with the structure has many advantages for technicians in the same industry nowadays, and indeed has technical progress.

As described above, the basic concept of the invention is to install LED light-emitting units on one surface of a light distribution system, wherein the axis direction of each LED light-emitting unit points to each area of an illumination target and is provided with an optimal optical system required by road illumination light distribution, a plurality of light-emitting units are connected in series and in parallel and then are controlled by a driving circuit in a shunting way to supply power, a radiator is arranged on the other surface of the light distribution system, the LED light-emitting units are ensured to work at normal temperature, and the problem of uneven luminosity distribution caused by inaccurate position during lamp construction and installation can be solved by installing an adjusting mechanism. Other operable embodiments of the present invention may be modified within the skill of the art to which the invention pertains so long as the basic knowledge is available. In the present invention, a patent is claimed for the essential technical solution, and the protection scope of the patent should include all the changes with the technical characteristics.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a LED street lamp, includes grading system (1), heat abstractor (2), lamp body (3), drive circuit (4), lamps and lanterns installation guiding mechanism (5), and wherein, grading system (1) is fixed on lamp body (3), and drive circuit (4) are installed in the cavity of lamp body (3), connect the LED luminescence unit of grading system (1) through the wire, its characterized in that: each LED luminous unit of the light distribution system (1) respectively irradiates to a point on each area of a road surface, each incident point corresponds to each LED luminous unit on the LED light distribution system, the optical axis direction, the luminous intensity and the luminous angle range of each LED luminous unit are determined according to the distance from the LED luminous unit to the incident point and the incident angle, light rays incident to each small area form a far light area, a middle light area and a near light area, the corresponding LED luminous units form a plurality of lighting modules according to the incident angle and the luminous intensity, and the lighting modules are fixed to corresponding positions of the light distribution system, so that each LED luminous unit has the optimal optical system required by road lighting light distribution.

2. The LED street lamp according to claim 1, characterized in that the central axis of at least three LED lighting units (11) of the light distribution system (1) forms an angle of 5 ° to 40 ° with the central axis of the respective adjacent LED lighting unit (11).

3. The LED street light according to claim 1, wherein the light distribution system (1) comprises at least three LED lighting units (11) with different light intensities and corresponding beam angles.

4. The LED street light according to any one of claims 1-3, characterized in that at least two LED light units (11a) in the light distribution system (1) illuminate towards the longitudinal direction of the road on both sides of the light fixture and towards the road surface area farthest away from the light fixture, and at least one LED light unit (11c) in the light distribution system (1) illuminates towards the road surface area closest to the light fixture, i.e. the vicinity of the lower point of the light fixture.

5. The LED street light as claimed in any of claims 1 to 3, characterized in that the light distribution system (1) has at least two LED lighting units (11b) which illuminate light towards the middle area of the road surface in the longitudinal direction of the road on both sides of the light fixture.

6. The LED street light according to claim 4, characterized in that the LED light emitting units (11a) which are irradiated towards the road surface area farthest away from the lamp have an included angle of 15-40 ° between the central axis and the road surface, and the light emitting intensity is the largest among all the LED light emitting units; the central axis of the LED light-emitting unit (11c) which irradiates towards the road surface area closest to the lamp, namely the vicinity of the lower point of the lamp, forms an included angle of 55-90 degrees with the irradiation plane, and the luminous intensity is the smallest in all the LED light-emitting units.

7. The LED street light as claimed in claim 5, wherein the LED lighting units (11b) which are directed towards the middle area of the road surface towards both sides of the light fixture along the longitudinal direction of the road have their central axes at an angle of 40 ° to 55 ° to the road surface, and the intensity of the emitted light is moderate in all the LED lighting units.

8. The LED street lamp according to claim 1, wherein a reflector (13) is disposed on a surface of the light distribution system (1) for fixing the LED light-emitting unit, and an opening (13a) is disposed at a position of the reflector corresponding to the LED light-emitting unit (11 a).

9. The LED street lamp according to claim 1, characterized in that the light distribution system (1) has a transparent curved or flat translucent cover (12) on the light exit surface.

10. The LED street lamp according to claim 1, characterized in that the back of the light distribution system (1) is provided with a heat sink (2).

11. The LED street light according to claim 10, wherein the heat sink (2) is configured as a separate heat sink module installed on the back of the light distribution system 1 corresponding to the LED light emitting units (11).

12. The LED street light according to claim 10, characterized in that the heat sink (2) is integrally molded with the light distribution system 1.

13. The LED street light according to any one of claims 10, 11 or 12, wherein the light distribution system (1) is provided with a heat dissipation breathing hole (21).

14. The LED street light according to claim 1, wherein the driving circuit (4) has at least three independent constant current outputs for respectively controlling the respective LED lighting units.

15. The LED street lamp according to claim 14, wherein the driving circuit (4) controls the output power by automatically switching on and off the power supply after receiving the illuminance signal or the time signal or other control signals.

16. The LED street lamp according to claim 1, wherein the lamp body (3) is provided with an installation adjustment mechanism (5), the elevation angle of the lamp relative to the irradiation surface is-15 ° - +15 ° by adjusting the fixed position of the lamp installation seat (51) and the installation tube, and the installation tube is fixed at any position in the installation seat as required to obtain different irradiation elevation angles.

The LED street light as claimed in claim 1, characterized in that the upper part of the light body (3) is provided with a level platform (52) for determining the installation inclination angle of the light.