KR102668856B1 - Light diffusing lens for LED street light - Google Patents

Abstract

The light diffusion lens for an LED street light according to the present invention is coupled to the lower surface of the street light body 100, and has a plurality of concave grooves 11 at the top to accommodate the LED element (L) provided inside the street light body 100. This formed upper diffusion stage (10); It consists of a lower diffusion lens 20 with a plurality of refraction and reflection parts 21 formed at the bottom so that the light emitted from the LED element L is refracted or totally reflected, and a deflection lens 30 coupled to one rear side to reflect the light downward. This expands the area of the light initially irradiated from the LED element, focuses the light on the lower diffusion end, and spreads the light passing through the light diffusion lens to both sides and the front to expand the area of the irradiated light, increasing lighting efficiency. There is an effect.

Description

Light diffusing lens for LED street light}

The present invention relates to a light diffusion lens for LED street lights. More specifically, the present invention relates to a light diffusion lens for LED street lights, and more specifically, to expand the area of light emitted from the LED element at the top, but to focus the light in a direct direction, with a receiving portion that accommodates the LED element and an inclined lens on one side. A total reflection unit is formed, and a wedge-shaped refraction reflection unit is provided at the bottom inclined in one direction so that light incident in the direct direction is greater than the critical refraction angle and is dispersed to both sides, and light is reflected forward at the rear end of the refraction reflection unit. It relates to a light diffusion lens for LED street lights that is provided with a deflection lens that protrudes as low as possible.

In general, street lights are installed at the edges of roads to prevent accidents and crimes by securing the visibility of drivers and pedestrians on roads or sidewalks. Depending on their purpose, they are divided into sign lights, road lights, and security lights.

Conventionally, halogen lamps, mercury lamps, sodium lamps, and metal halide lamps have been widely used as light sources for street lights, but they have the problem of high power consumption and low luminous efficiency.

To solve this problem, LED street lights have recently been proposed using LEDs with low power consumption and long lifespan as the light source.

On the other hand, LED is a light source body that has the radiation form of a point light source due to the strong straight-line nature of light. As shown in Figure 1, the radiation form of light energy forms a Gaussian distribution concentrated in the central area compared to the surrounding area, which means that the central light is Because it is too strong compared to its surroundings, it causes glare and light pollution due to sparkle.

Accordingly, efforts are being made to diversify and adjust the light distribution of the LED light source to guide the radiation form of light energy to a surface light source as well as to compensate for the shortcomings of glare and light pollution. A representative example is the use of light diffusion lenses. can be mentioned.

As a related prior art, Patent Publication No. 10-1362186, 'Light diffusion lens of LED streetlight equipped with total reflection means', applied and registered by the present applicant, was disclosed.

As shown in FIG. 1, the prior art includes an upper diffusion lens (10) having a plurality of concave grooves (11) formed at the top to accommodate the LED element (L) provided inside the street light body (100). ; It is characterized by being composed of a lower diffusion lens 20 with a plurality of refraction and reflection parts 21 formed at the bottom so that the light emitted from the LED element L is refracted or totally reflected.

However, the above-described prior art was able to increase lighting efficiency by diffusing light to both sides and maintaining the direct direction and both sides in a bright state. However, the problem is that lighting efficiency is not maximized because the light cannot be diffused to the front where the street lights are installed. There was this.

The present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to form a receiving part for accommodating the LED element at the top and a total reflection part inclined to one side to reduce the area of the light irradiated from the LED element. An upper diffusion stage that expands and focuses light in a direct downward direction, a lower diffusion stage formed with a plurality of wedge-shaped refractive reflection parts inclined in one direction so that the light transmitted through the lower part of the upper diffusion stage is refracted or totally reflected to both sides, and The present invention provides a light diffusion lens for an LED street light that is provided with a deflection lens extending downward and protruding on one rear side of the lower diffusion end, thereby diffusing light forward.

The light diffusion lens for an LED street light according to the present invention to achieve the above object is a light diffusion lens for an LED street light that disperses light emitted from the LED elements of the LED street light body, and includes a plurality of light diffusion lenses provided inside the street light body on the upper surface. an upper entrance end having a concave groove recessed in the lower part to accommodate two LED elements; a lower diffusion stage on which a plurality of wedge-shaped refractive and reflective parts are formed on the lower surface so that the light emitted from the LED device is refracted or totally reflected; A deflection lens is provided that extends downward from the rear end of the lower diffusion stage and protrudes so that the light incident on the lower diffusion stage is reflected toward the front lower part,

The recessed groove includes a plurality of LED accommodating parts recessed downward to accommodate the LED element, an upper total reflection part obliquely extending downward from the outer upper part of the LED accommodating part, and an upper refracting part formed on the bottom surface of the LED accommodating part. Two LED mounting holes are formed, and a coupling rib extending outward is formed around the concave groove so that the light diffusion lens can be seated inside the streetlight body; At the center of the refractive reflection unit, there are a plurality of first central refractive reflection units with one side protruding slanted downward so that the light incident from the upper incident end is refracted or totally reflected to one side, adjacent to the front of the first central refractive reflection unit, and It is characterized in that a second central refractive reflector is provided that protrudes obliquely downward in a direction opposite to the first central refractive reflector.

On the outer side of the refractive reflector, a first outer refractive reflector extending obliquely in the same direction as the inclination direction of the first central refractive reflector so that the light incident on the upper incident end is refracted or totally reflected in the direction of both sides, and the second refractive reflector It is characterized in that a second outer refractive reflector is provided obliquely extending in the same direction as the inclination direction of the central refractive reflector.

The deflection lens is provided with an incident angle expansion stage whose front inner surface is obliquely extended toward the rear to increase the angle of incidence of light passing through the upper incidence stage, and is rounded so that light incident on both sides of the back of the incident angle expansion stage is refracted to the outside. It is characterized by being provided with a biased refractive end.

The upper refractive part is formed to be inclined on one side, and the upper deflection refracting part formed in a concave shape is provided in the central part of the concave groove, and the upper diffusion refractive part formed in a convex shape is provided in the outer part of the concave groove.

The concave groove is characterized in that it is provided with an upper refraction deflection part that extends to one rear side between the LED receiving part and the upper part of the upper total reflection part so that the light incident from the LED element is deflected.

As such, the light diffusion lens for LED street lights according to the present invention has the following effects.

First, the upper diffusion end where a plurality of LED elements are accommodated is provided with an LED receiving port consisting of an LED receiving part, an upper total reflection part obliquely extending downward, and an upper refracting part, so that the light incident in the side direction is totally reflected back in the downward direction. This expands the area of light initially radiated from the LED device, but allows the light to be concentrated at the lower diffusion end, improving lighting efficiency.

Second, the lower diffusion end, which diffuses the light of the LED element and transmits it to the outside, has a refractive reflector that refracts or totally reflects the light incident from the upper diffusion end to both sides, and includes the first and second central refractive reflectors and the first and second outer refractive reflectors. By being composed of a part, the efficiency of the streetlight can be greatly improved by distributing the irradiated light widely to both sides.

Third, a deflection lens is provided that extends downward from the rear end of the lower diffusion stage and protrudes so that the light incident on the lower diffusion stage is reflected towards the lower front, thereby diffusing the light in the direction directly below and in front of the streetlight, thereby illuminating the streetlight. It has the effect of maximizing efficiency.

1 is a diagram illustrating a light diffusion lens of an LED street light equipped with a total reflection means according to the prior art;
Figure 2 is a diagram illustrating the configuration of a light diffusion lens in a streetlight body according to the prior art;
Figure 3 is a diagram illustrating the upper incident end of the light diffusion lens for LED street lights according to the present invention;
Figure 4 is a plan view and cross-sectional view of the upper incident end according to the present invention;
Figure 5 is a diagram explaining the upper refractive part according to the present invention;
Figure 6 is a diagram explaining the lower diffusion stage and deflection lens according to the present invention;
Figure 7 is a front view of the light diffusion lens for LED street lights according to the present invention;
Figure 8 is a diagram explaining a deflection lens according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

As shown in FIGS. 3 to 8, the light diffusion lens for an LED street light according to the present invention is a light diffusion lens (1) of an LED street light that disperses light emitted from the LED element (L) of the LED street light body (100). An upper entrance end (10) formed with a concave groove (11) recessed downward to accommodate a plurality of LED elements (L) provided in the street light body (100) at the upper part; A lower diffusion end (20) having a plurality of wedge-shaped refractive and reflective parts (21) formed at its lower portion to refract or totally reflect the light emitted from the LED element (L); It consists of a deflection lens 30 that extends downward from the rear end of the lower diffusion stage 20 and protrudes so that the light incident on the lower diffusion stage 20 is reflected toward the front lower part.

Here, the recessed groove 11 includes an LED receiving portion 12a recessed downward to accommodate the LED element L, and an upper total reflection portion obliquely extending downward from the upper outer portion of the LED receiving portion 12a ( 12b) and a plurality of LED mounting holes 12 consisting of an upper bending portion 12c formed on the bottom surface of the LED receiving portion 12a are provided.

That is, the LED seating port 12 is formed in a cone shape, and the LED receiving portion 12a is provided at the upper tip.

In addition, a coupling rib 13 extending outward is formed around the concave groove 11 so that the light diffusion lens 1 can be seated inside the street light body 100, thereby stabilizing the street light body 100. It can be fastened with a bolt or fixed with an adhesive. When tightening with a bolt, it is preferable that the streetlight body 100 is provided with a bolt fastening hole.

In addition, at the center of the refractive reflection part 21, a plurality of first central refractive reflection parts 21a are formed, one side of which is inclined downward and protrudes so that the light incident from the upper incident end 10 is refracted or totally reflected to one side, A second central refractive reflection unit 21b is provided adjacent to the front of the first central refractive reflection unit 21a and protrudes obliquely downward in a direction opposite to the first central refractive reflection unit 21a.

Here, the first central refractive reflection unit 21a and the second central refractive reflection unit 21b are arranged with central inner surfaces adjacent to each other as shown in FIG. 6, and inclined surfaces are formed in opposite directions. desirable.

On the outer side of the refractive reflector 21, an oblique extension is made in the same direction as the inclination direction of the first central refractive reflector 21a so that the light incident on the upper incident end 10 is refracted or totally reflected in the direction of both sides. A first outer refractive reflector 21c and a second outer refractive reflector 21d extending obliquely in the same direction as the inclination direction of the second central refractive reflector 21b are provided.

Here, the first outer refractive reflection part 21c and the second outer refractive reflection part 21d of the refractive reflection part 21 are provided with inclined surfaces in opposite directions.

Meanwhile, the deflection lens 30 is provided with an incident angle expansion end 31 whose front inner surface is obliquely extended toward the rear so that the incident angle of light passing through the upper incident end 10 increases, and the incident angle expansion end 31 Deflection refracting ends 32 are provided on both sides of the back side and are rounded so that the incident light is refracted toward the outer side.

The incident angle expansion stage 31 increases the amount of reflection by totally reflecting the incident light in the direct downward direction when the incident angle is greater than the refraction critical angle.

In addition, an upper refraction deflection part (12d) is provided between the LED receiving part (12a) and the upper end of the upper total reflection part (12b), extending to one rear side so that the light incident from the LED element (L) is biased and refracted. .

Here, the upper refractive deflection unit 12d functions to increase the angle of incidence of light incident on the upper total reflection unit 12b.

On the other hand, the upper refractive part 12c is formed to be inclined to one side, and an upper deflection refractive part 121 formed in a concave shape is provided in the central part of the concave groove 11, and an upper diffusion refractive part formed in a convex shape ( 122) is provided on the outer side of the concave groove 11.

That is, the upper deflection refractor 121 refracts the light incident from the center of the concave groove 11 to the rear surface to bias the light in the direct downward direction, and the upper diffuse refractor 122 is the concave groove ( The light incident on both sides of 11) is spread to the sides.

The operation of the light diffusion lens for LED street lights according to the present invention configured as described above is as follows.

As shown in FIGS. 3 to 8, the light diffusion lens for LED street lights according to the present invention has an upper diffusion stage 10 containing an LED element (L) at the top, and the upper diffusion stage 10 at the bottom. A lower diffusion end (20) formed with a refractive reflection part (21) that refracts or totally reflects the transmitted light to the side, and extends downward from the rear end of the lower diffusion end (20), and the upper diffusion end (10) By providing a deflection lens 30 that reflects a portion of the transmitted light forward or directly downward, the light emitted from the LED element L is diffused from the upper diffusion end 10 into the interior of the light diffusion lens, The light diffused by the lower diffusion end 20 is refracted or reflected to both sides, and the light diffused by the deflection lens 30 is reflected forward or directly downward. This improves lighting efficiency by spreading the light of the LED element (L), which travels in a straight line, widely and expanding the irradiation area in a directional manner.

Specifically, a plurality of LED seating ports 12 are formed in the concave groove 11 of the upper entrance end 10, and the LED seating ports 12 are conical in shape and have an LED receiving portion 12a at the upper tip. Since the upper total reflection part 12b is formed by being recessed at the bottom and is inclined at the side, the light incident on the upper total reflection part 12b is refracted or totally reflected in the direct downward direction.

And, the upper refractive part 12c constituting the bottom of the LED receiving part 12a is divided into an upper deflection refraction part 121 and an upper diffuse refraction part 122, and the upper deflection refraction part 121 has one side. By being molded to be slanted and concave, the incident light is refracted in the direct downward direction, and the upper diffuse refracting portion 122 is molded into a convex shape to refract light toward the outside. The light initially irradiated from the LED element (L) can be diffused into the inside of the lens.

Meanwhile, the light incident on the lower diffusion end 20 is provided with a wedge-shaped refractive reflection part 21, and the inclined surface of the refractive reflection part 21 reflects the light incident at the center of the LED receiving part 12a. By total reflection to both left and right sides, more light is diffused to both sides, which has the effect of expanding the lighting area.

Here, the refractive reflection part 21 is provided with a first central refractive reflection part 21a and a second central refractive reflection part 21b having inclined surfaces facing each other in the center, and the first central refractive reflection part 21 is located on the outer side. By being composed of a first outer refractive reflector (21c) and a second outer refractive reflector (21d) having the same slope as (21a) and the second central refractive reflector (21b), the illumination area in the direction of the above-mentioned both sides is increased. It can be expanded.

In addition, the deflection lens 30 reflects light incident in the direction of the LED streetlight, that is, in the rear, forward or directly downward, so that the light diffusion lens acts as directional lighting.

At this time, the front inner surface of the incident angle expansion end 31 constituting the inner surface of the deflection lens 30 is obliquely extended toward the rear so that the incident angle of light increases, thereby increasing the amount of totally reflected light.

In addition, the deflection refraction ends 32 formed on both sides of the rear surface of the incident angle expansion end 31 refract the light passing through the incident angle expansion end 31 to the outside, so that both sides below the street lamp support are illuminated more brightly. .

Meanwhile, the upper refractive deflection unit 12d provided between the LED receiving unit 12a and the upper end of the upper total reflection unit 12b adjusts the amount of light incident from the LED element L to be totally reflected in the direct downward direction. By increasing the number, the function of the incident angle expansion stage 31 is complemented.

In this way, the light diffusion lens for LED street lights according to the present invention has the effect of maximizing lighting efficiency by diffusing light not only to both sides of the street light but also to the front.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

<Explanation of symbols for main parts of the drawing>
1: Light diffusion lens 100: Street light body
10: upper entrance 11: concave groove
12: LED receiving port 12a: LED receiving part
12b: upper total reflection part 12c: upper refraction part
12d: upper bending deflection portion 13: coupling rib
20: lower diffusion group 21: refraction reflection unit
21a: first central refractive reflection unit 21b: second central refractive reflection unit
21c: first outer refractive reflector 21d: second outer refractive reflector
30: Deflection lens 31: Incident angle expansion stage
32: deflection refraction end 121: upper deflection refraction section
122: upper diffuse refraction part
L: LED device

Claims (5)

In the light diffusion lens (1) of the LED street light that disperses the light emitted from the LED element (L) of the LED street light body (100),
An upper entrance end (10) formed with a concave groove (11) recessed downward to accommodate a plurality of LED elements (L) provided inside the street light body (100) at the upper part; A lower diffusion end (20) having a plurality of wedge-shaped refractive and reflective parts (21) formed at its lower portion to refract or totally reflect the light emitted from the LED element (L); A deflection lens 30 is provided that extends downward from the rear end of the lower diffusion stage 20 and protrudes so that the light incident on the lower diffusion stage 20 is reflected toward the lower front,
The recessed groove 11 includes an LED receiving part 12a recessed downward to accommodate the LED element L, and an upper total reflection part 12b extending obliquely downward from the outer upper part of the LED receiving part 12a. And, a plurality of LED mounting ports 12 consisting of an upper bending portion 12c forming the bottom of the LED receiving portion 12a are provided,
A coupling rib 13 extending outward is formed around the concave groove 11 so that the light diffusion lens 1 can be seated inside the street light body 100;
At the center of the refractive reflector 21, there are a plurality of first central refractive reflectors 21a whose one side protrudes slanted downward so that the light incident from the upper incident end 10 is refracted or totally reflected to one side, and A second central refractive reflector (21b) is provided adjacent to the front of the first central refractive reflector (21a) and protrudes obliquely downward in a direction opposite to the first central refractive reflector (21a),
The upper bending portion 12c is
An upper deflection refraction part 121 formed to be inclined on one side but molded into a concave shape is provided in the central part of the concave groove 11, and an upper diffusion refraction part 122 formed into a convex shape is provided in the concave groove 11. A light diffusion lens for LED street lights, characterized in that it is provided on the outer part. According to paragraph 1,
On the outer side of the refractive reflection unit 21,
A first outer refractive reflector (21c) obliquely extending in the same direction as the inclination direction of the first central refractive reflector (21a) so that the light incident on the upper incident end (10) is refracted or totally reflected in the direction of both sides; , A light diffusion lens for an LED street light, characterized in that it is provided with a second outer refractive reflector (21d) obliquely extending in the same direction as the inclination direction of the second central refractive reflector (21b). According to paragraph 2,
The deflection lens 30 is
An incident angle expansion end (31) is provided, the front inner surface of which extends obliquely toward the rear so that the incident angle of light passing through the upper incident end (10) increases,
A light diffusion lens for an LED street light, characterized in that it is provided with a deflection refracting end (32) formed roundly so that the light incident on both sides of the back of the incident angle expansion end (31) is refracted to the outer part. delete According to paragraph 1,
An upper refraction deflection part (12d) is provided between the LED receiving part (12a) and the upper part of the upper total reflection part (12b), extending to one rear side so that the light incident from the LED element (L) is deflected. Light diffusion lens for LED street lights.

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