CN205155845U - LED street lamp lamp shade with grading function - Google Patents

Abstract

The utility model belongs to the field of semiconductor lighting, in particular to an LED street lamp lampshade with light distribution function. The LED street lamp lampshade of the utility model can perform light distribution on the LED surface light source, widen the light beam angle of the light source parallel to the driving direction, and realize a bat-wing light distribution curve; realize an asymmetric light distribution curve perpendicular to the driving direction. The light distribution curve reduces the proportion of light outside the road (side of the house) and improves the light utilization rate of the lamp. The end of the lampshade close to the light pole is made of high-reflectivity material or coating, which reduces the lighting at the edge of the house and allows more light to shine on the road. The cross-section of the lampshade along the short axis direction of the lamp (parallel to the driving direction) is the effect of a combination of multiple lenses: the inner and outer surfaces on both sides form two large convex lenses, which generate a batwing light distribution curve along the driving direction; Several prisms or cylindrical mirrors are distributed on the inner surface of the central part, which can further widen the beam angle of the LED surface light source. The lampshade can be integral or combined.

Description

A lampshade for LED street lamp with light distribution function

technical field

The utility model belongs to the technical field of semiconductor lighting, in particular to an LED street lamp lampshade with light distribution function.

Background technique

With the country's increasing emphasis on energy conservation and emission reduction, lighting energy-saving renovation projects have become increasingly important. In the past ten years, the rapid development of semiconductor lighting technology and the advantages of high efficiency, energy saving and long life of LED lights have made it an inevitable trend in the development of road lighting. Today, LED street lamps are gradually being promoted and applied, and pilot projects have spread all over the country.

LED street lamps generally emit light in a half space, mainly including LED light sources (or packaging devices), secondary light distribution devices, drivers, radiators and housings; secondary light distribution devices are one or more of reflectors, lenses, prisms and lampshades Multiple combinations.

In order to meet the various standard requirements of road lighting, it is necessary to carry out reasonable light distribution design for street lamps. Since a single LED chip is a point light source with a small light-emitting surface, when designing a high-power LED street lamp, the packaging structure, specifications and models adopted by each manufacturer are different, and the lampshade or lens structure of the LED street lamp equipped with it is endless. . At present, a lens is usually installed on the surface of a single LED package device for light distribution design, and multiple LED package devices with lenses are installed on one LED street lamp to form the required light distribution curve of the lamp. CN201410193097.2 adopts a lampshade with a light distribution surface on the inner surface for secondary optical design, but each light distribution surface on the inner surface also corresponds to a single LED chip, and actually distributes light to a single chip.

The brightness of a single LED is higher. Simultaneous installation of multiple LED chips or packaged devices in a lamp will produce multiple corresponding bright spots, causing glare and affecting visual comfort. The LED surface light source module adopts an integral fluorescent plate or uniform light plate, so the light source is more uniform, no obvious bright spots will be produced, and the human eye looks more comfortable and soft. However, surface light sources can only form cosine light distribution. When the ratio of the distance between adjacent light poles and the height of light poles (distance-to-height ratio) is large, it often cannot meet the requirements of road lighting standards for average brightness and longitudinal brightness uniformity. Secondary light distribution is required.

CN201110000998.1 proposes a lampshade whose inner surface is composed of regularly arranged convex lenses, which can distribute light to the LED light source as a whole. CN201120255375.4 proposes a lampshade whose upper surface is a smooth plane and whose lower surface has a group of linear focusing lens groups, which can also simplify the light distribution design of LED street lamps and reduce costs. These two lenses can both improve the lighting efficiency and lighting quality of the lamp, but they cannot meet the light distribution requirements of the LED surface light source.

CN201110034544.6 proposes a lens structure for a surface light source. The light-emitting surface of the appearance is in the shape of a peanut shell, and the base surface is recessed in the direction of the light-emitting surface to form an array of light-incident units. The incident surface of the surface shape. The lens has a complex structure and is difficult to manufacture, and the light distribution produced is completely symmetrical, and the light loss to the edge of the house is relatively large.

Contents of the invention

The purpose of the utility model is to provide an LED street lamp shade with light distribution function which is simple in structure and easy to manufacture, which can not only meet the relevant requirements of road lighting standards, but also improve the light utilization rate of the lamp and improve the lighting effect of the lamp.

The LED street lamp lampshade with light distribution function provided by the utility model can perform light distribution on the LED surface light source, and the light beam angle of the light source can be opened in the short axis direction of the lamp (that is, parallel to the driving direction) to realize batwing light distribution. Curve; realize asymmetrical light distribution curve in the direction of the long axis of the lamp (that is, perpendicular to the direction of driving), reduce the proportion of light outside the road (side of the house), and improve the light utilization rate of the lamp.

In the utility model, the section of the lampshade along the short axis direction of the lamp is the result of a combination of various lenses. The section is formed by generatrices of the inner and outer surfaces, and the two generatrixes are free curves.

Further, the inner surface generatrix is segmented, and each segment forms lenses with different focal lengths with the outer surface generatrix, so as to better realize the light distribution function.

Further, both sides of the section of the lampshade along the short axis direction of the lamp are cylindrical convex lenses composed of the inner and outer surface busbars, which can pull the beam angle of the LED surface light source to both sides and generate batwings along the driving direction. shaped light distribution curve.

Further, a number of prisms or cylindrical mirrors are distributed on the inner surface of the central part of the cross-section, and their protruding surfaces face the LED surface light source; the structure of the prisms or cylindrical mirrors can further widen the beam angle of the LED surface light source.

In the utility model, the section of the lampshade along the long axis of the lamp is a symmetrical structure, and its two sides are convex or flat, and the end close to the lamp pole is made of high reflectivity material or coating, which reduces the lighting on the side of the house and makes the More light hits the road.

Further, the section of the lampshade along the long axis of the lamp is an asymmetric structure, the side away from the light pole is convex, and the side close to the light pole is flat.

In the present invention, adjusting the light output distribution of the surface light source can change the maximum light intensity angle of the batwing light distribution generated by the lens.

In the present invention, the LED lampshade may be integral, or may be composed of a plurality of lampshade modules.

The LED street lamp lampshade with light distribution function of the utility model realizes the functional light distribution of the opposite surface light source, and solves the problem that the beam angle of the surface light source is difficult to adjust. For surface light sources with different light output distributions, the maximum light intensity angle formed by the lampshade of the utility model is variable. Various types of light distribution curves can be realized by matching different types of surface light sources with the lampshade of the present invention, thus reducing the development cost of lampshade molds in the development process of lamp products.

Description of drawings

Fig. 1 is an appearance structure diagram of an LED street lamp shade with a light distribution function of the present invention.

Fig. 2 is an internal structure diagram of an LED street lamp shade with a light distribution function according to the present invention.

Fig. 3 is an installation effect diagram of an LED street lamp lampshade with a light distribution function of the present invention.

Fig. 4 is a cross-sectional view along the short axis of the lamp of an LED street lamp shade with a light distribution function of the present invention.

Fig. 5 is a cross-sectional view along the long axis of the lamp of an LED street lamp shade with light distribution function of the present invention.

Symbols in the figure: 1- lampshade away from the end of the light pole, 2- lampshade close to the end of the light pole, 3- convex lens at the side end, 4- prism, 5- frame.

detailed description

Below in conjunction with accompanying drawing and embodiment, the utility model is described further. The described embodiments are only some of the embodiments of the present invention. All other embodiments without creative achievements based on the embodiments of the present utility model belong to the protection scope of the present utility model.

An LED street lamp lampshade with a light distribution function can distribute light to an LED surface light source, and its appearance structure and internal structure are shown in Fig. 1 and Fig. 2 respectively. The lampshade is a one-piece lampshade cast in high-transmittance hard glass and tempered. The installation direction and installation effect of the lampshade on the street lamp are shown in FIG. 3 .

Fig. 4 is a cross-sectional view of the lampshade along the short axis of the lamp. It can be seen from the figure that the light distribution curve of the lamp in the parallel driving direction is the result of combining various lenses. On the section in this direction, the inner and outer surfaces on both sides of the lampshade form two large convex lenses 3, which can widen the beam angle of the LED surface light source in the driving direction and realize batwing light distribution. In the middle part of the lampshade, the outer surface is a plane, and the inner surface is distributed with several cylindrical mirrors 4 parallel to each other with a semicircular cross-section. There is an integral outer frame 5 on the outside of the lampshade, which can be used to compress the lampshade when installed on the lamp.

It can be seen from the cross-sectional view along the long axis direction of FIG. 5 that the lampshade has a symmetrical structure, with convex surfaces on both sides, which can widen the beam angle. The end close to the light pole adopts a high-reflectivity coating, which can reduce the lighting at the edge of the house and reflect the light back to the surface to improve the light utilization rate of the lamp.

This lampshade is used for LED street lamps, and a single LED surface light source module with a power of 10W and an area of 132mm×66mm is used. Six surface light source modules are used to form a surface light source with a power of 60W and an area of 396mm×132mm, which can realize ideal road lighting light distribution. , to meet the national road lighting standards. The lamp has a wide batwing-shaped light distribution curve in the direction parallel to the driving direction, and the maximum light intensity angle can reach 150°; while the light distribution curve is asymmetrical in the direction perpendicular to the driving direction, and the light distribution angle away from the pole end Larger, and the light distribution angle near the end of the light pole is smaller, which can reduce the proportion of light at the edge of the house and improve the utilization rate of light.

The lampshade is easy to manufacture and has low cost. As the light output distribution of the surface light source changes, the lampshade can produce different batwing light distribution curves, so street lamps with different model requirements can adopt a uniform lampshade structure, which reduces the development cost of the lampshade. The lampshade is made of glass, which has better weather resistance, longer service life and easier maintenance. Moreover, the lampshade is easy to install and can directly transform the lamps of the sodium lamp, which is more cost-effective.

Claims (10)

1. there is a LED road lamp shade for light distributing function, it is characterized in that: luminous intensity distribution can be carried out to LED area light source, be namely parallel to along light fixture short-axis direction the beam angle that light source is pulled open in garage direction, realize bat-wing distribution curve flux; Namely asymmetrical distribution curve flux is realized perpendicular to garage direction along light fixture long axis direction.

2. according to the LED road lamp shade with light distributing function according to claim 1, it is characterized in that: described lampshade is the effect of multiple lens combination along the cross section of light fixture short-axis direction.

3. according to the LED road lamp shade with light distributing function according to claim 2, it is characterized in that: described lampshade is be made up of the bus on inside and outside surface along the cross section of light fixture short-axis direction, and described two buses are free curve.

4. according to the LED road lamp shade with light distributing function according to claim 3, it is characterized in that: described inner surface bus is segmented, every section forms the lens of different focal, better to realize light distributing function with outer surface bus.

5. according to the LED road lamp shade with light distributing function according to claim 4, it is characterized in that: described lampshade is the column convex lens be made up of described inside and outside surperficial bus along the both sides in the cross section of light fixture short-axis direction, the beam angle of LED area light source can be pulled open to both sides, produce bat-wing distribution curve flux along garage direction.

6. according to the LED road lamp shade with light distributing function according to claim 4, it is characterized in that: described lampshade to distribute some prisms or cylindrical mirror on an internal surface along the core in the cross section of light fixture short-axis direction, and its raised face is towards LED area light source; Described prism or cylindrical lens structure can pull open the beam angle of LED area light source further.

7. according to the LED road lamp shade with light distributing function according to claim 1, it is characterized in that: described lampshade is symmetrical structure along the cross section of light fixture long axis direction, two sides are convex surface or plane, near material or the coating of an employing high reflectance of lamp stand.

8. according to the LED road lamp shade with light distributing function according to claim 1, it is characterized in that: described lampshade is non-symmetrical structure along the cross section of light fixture long axis direction, and the side away from lamp stand is convex surface, is plane near the side of lamp stand.

9. according to the LED road lamp shade with light distributing function according to claim 4, it is characterized in that: regulate the light out-degree of described area source to distribute, the largest light intensity angle of the bat-wing luminous intensity distribution that described lens produce can be changed.

10. according to the LED road lamp shade with light distributing function one of claim 1-9 Suo Shu, it is characterized in that: described LED lamp cover is all-in-one-piece, or formed by multiple lampshade block combiner.