WO2011010790A1

WO2011010790A1 - Bar type lens with asymmetric cross section and light source module for road lighting device using same

Info

Publication number: WO2011010790A1
Application number: PCT/KR2010/003343
Authority: WO
Inventors: 안미리; 김성운
Original assignee: 주식회사 태경컨설턴트
Priority date: 2009-07-20
Filing date: 2010-05-26
Publication date: 2011-01-27
Also published as: KR100936430B1

Abstract

The present invention relates to a bar type lens with an asymmetric cross section which prevents glaring drivers and can effectively and uniformly illuminate roads, and to a light source module using the same. According to one embodiment of the present invention, a bar type lens with an asymmetric cross section and having the longitudinal direction in the horizontal direction comprises: a plane of incidence for receiving light emitted from a light source which is situated behind the lens; and a radiation surface which is disposed opposite to the plane of incidence and is curved for radiating the light incident on the plane of incidence towards the surface of the road.

Description

Bar type lens of asymmetrical cross section and light source module of road lighting device using same

The present invention relates to a bar type lens having an asymmetric cross section and a light source module using the same, and more particularly, to a bar type lens having an asymmetric cross section lighting a road more efficiently while preventing glare of a driver and a road lighting apparatus using the same. It relates to a light source module.

In general, roads are mainly used by cars and pedestrians. On these roads, road users and road users should be able to easily identify the road and use it safely.

In particular, when it is difficult to identify the road at night, various safety accidents occur.

Therefore, in general, a lighting device such as a street lamp is installed on the road.

Conventional street light 10 is made to install a light bulb 3 for the upper end of the pole 5 having a height of about 8 ~ 12M from the ground as shown in Figure 1 is made to fully illuminate the road below.

In addition, the street light as described above is installed at a predetermined interval as shown in Figure 2 is made to light the road.

However, the conventional street light has the following problems.

First, a conventional street light is installed at a high position in order to illuminate a wide range with a single street light, and thus the distance from the road surface becomes far, so that a light bulb having a high light quantity is needed to sufficiently light the road surface, thereby providing an installation cost and There are disadvantages in life and power usage.

Secondly, the distance between the light source and the road surface is far, which is scattered by the water droplets of the fog when the fog is generated is an unfavorable lighting method to achieve the purpose of sufficiently illuminating the road surface.

Third, since the light source illuminates from the upper part of the road toward the lower part, as shown in FIG. 2, the lower part of the light source is formed with a hot spot that is lower in brightness as the brightness becomes brighter and more distant than the regulation, and thus the road is uniform. There is a problem that is not illuminated.

Fourthly, since the range illuminated by the street light is roundly formed around the light source, it is illuminated by the rear light to the outside of the road where lighting is not required, so that the creature or insect gets light at night and disturbs the ecosystem. There is also a problem that occurs.

Fifth, since the position of the light source is located above the driver's field of vision, direct light is irradiated to the driver, causing glare during driving, which hinders safe driving.

The present invention is to solve the above problems, the present invention is to provide a light source module using an asymmetric cross-section lens and asymmetrical cross-section without causing disturbance of the ecosystem without brightening the road uniformly and causing the driver glare do.

In order to solve the above problems, according to one embodiment of the present invention, it has a longitudinal direction to one side, formed on the incident surface formed so as to receive the light emitted from the light source provided on the rear side and formed on the opposite side of the incident surface The light incident from the incident surface is emitted toward the road surface, and the light emitted from the upper side is larger than the light emitted from the lower side, so that the light quantity is concentrated toward the farther distance from the installation point to the road surface. A bar type lens having an asymmetrical cross section including a radial surface formed in a cross section is provided.

The light may be refracted such that the amount of light emitted from the upper side of the emission surface is greater than the amount of light emitted from the lower side.

The radial surface may be formed such that the radius of curvature of the upper side forms a cross section of a shape shorter than the radius of curvature of the lower side.

The radiation surface may be such that the center of curvature of the upper side is located below the center of curvature of the lower side.

A flat portion extending upward of the radiation surface and having a plane on which light is emitted may be further formed.

On the other hand, according to another aspect of the present invention,

It is provided along a light source and a road which emits light and has a longitudinal direction in the transverse direction, and has a longitudinal direction in the transverse direction, and an incident surface on which a light emitted from the light source is received is formed on a rear side of the incident surface. It is formed on the opposite side and the light incident from the incident surface is emitted toward the road surface, the amount of light emitted from the upper side is greater than the amount of light emitted from the lower side, so that the distance from the installation point to the road surface toward the far side Provided is a light source module of a road lighting apparatus including a bar type lens having an asymmetric cross section formed with an asymmetric cross section formed with an asymmetric cross section so that the amount of light is concentrated.

The bar-type lens of the asymmetrical cross section may be configured such that the amount of light emitted from the upper side of the emission surface is greater than the amount of light emitted from the lower side of the emission portion.

In addition, a planar portion extending above the curved radiation surface and having a plane on which the light is emitted may be further formed.

The incident surface may be formed to be inclined such that a normal line perpendicular to the incident surface faces a road surface.

In addition, a heat sink coupled to the rear surface of the bar-type lens of the asymmetrical cross section and connected to the light source and extending toward the upper side is formed on the rear surface to radiate heat generated from the light source.

According to the bar type lens of the asymmetric cross section and the light source module for street light using the same according to the present invention as described above has the following effects.

First, using the LED element as a light source, the power consumption is reduced, and the operating cost of the light source can be improved, thereby reducing the operating cost.

Second, because the light sources are arranged laterally, you can brighten the road more evenly.

Third, since the lens refracts the light to concentrate the amount of light in a part of the upper side of the irradiation angle range, the light can be concentrated at a far distance from the irradiation surface, so that the lens can be more uniformly lighted in the width direction of the road, thereby satisfying the overall uniformity.

Third, since the lighting device for the road is not built on a high pole, but is provided on a road rail or a center separator of about 1m in height, since the installation height is low, the amount of light lost due to the decrease in the distance from the road is low. Even when the light source is used, there is an advantage that sufficient illumination is possible, and it can also perform a lane induction function.

Fourth, since the installation height of the road lighting device is less than about 1m, it is lower than the eye level of the driver has the effect of preventing the night glare of the driver.

Fifth, since the installation height of the road lighting device is low, the light scattered during the generation of fog is relatively small, which enables more efficient lighting.

Sixth, it is possible to form a light source module by connecting a plurality of lenses in the longitudinal direction, the length of the lens can be formed shorter than the length of the light source module it is easy to manufacture the lens.

Seventh, because the light is refracted to illuminate only the road surface, the amount of light can be concentrated on the road surface to brighten the road.

Eighth, since there is no rear light, there is an advantage that plants and insects around the road are not illuminated at night, thereby causing disturbance of the ecosystem.

Ninth, the angle of the light source module can be adjusted to facilitate the adjustment of the irradiation angle.

Tenth, there is an effect that the heat dissipation fin is extended to the upper side to improve the heat dissipation effect.

1 is a view showing the brightness of a conventional street light and a road illuminated by a street lamp;

2 is a view from above of FIG. 1;

3 is a cross-sectional view showing a cross-section of the bar type lens of the asymmetric cross-section bar type asymmetric cross section according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view illustrating an example in which light is refracted at an incident surface of a bar type lens having an asymmetric cross section of FIG. 3;

5 is a perspective view of FIG. 3;

FIG. 6 is a diagram illustrating a brightness distribution among irradiation angle ranges of light emitted by the bar type lens of the asymmetric cross-section of FIG. 3;

7 is an exploded perspective view illustrating a light source module and a housing of a road lighting apparatus according to an embodiment of the present invention;

FIG. 8 is a view illustrating brightness of a road illuminated by a light source module of the road lighting apparatus of FIG. 7.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

The bar-type lens of the asymmetric cross section (hereinafter referred to as the "lens") according to the exemplary embodiment of the present invention includes an incident surface 110 and a radiation surface 120 as shown in FIGS. 3 and 4. It can be done by.

The incident surface 110 is a surface on which light emitted from the light source 90 is incident and received. In general, the light source 90 is provided on a surface facing the incident surface 110.

The radiation surface 120 is formed on the opposite side of the incident surface 110, and is bent so that the light received from the incident surface 110 is refracted and radiated.

At this time, the radiating surface 120 may be formed asymmetrically so that the radiated light is not uniformly radiated, but the radiated light is biased toward one side so that the amount of light is different.

More preferably, the radiation surface 120 is formed to be bent so that the intensity of light emitted from the upper side 126 is stronger than the intensity of light emitted from the lower side 121.

To this end, the radiation surface 120 is preferably formed such that the curvature of the upper side 126 and the curvature of the lower side 121 are different from each other, as shown in FIG.

More specifically, the upper curvature radius Ru of the radiation surface 120 is shorter than the lower curvature radius Rl, and the upper curvature center Cu is located below the lower curvature center Cl. It is to form a cross section of the shape.

The density inside the lens 100 is higher than the density of air, the upper curvature radius Ru is shorter than the lower curvature radius Rl, and the upper curvature center Cu is the lower curvature center ( Since it is located below Cl), when light is emitted through the radiation surface 120, it is refracted to the upper side in the radiation surface 120, as shown in FIG.

That is, the angle formed between the original traveling direction 96 of light and the normal line n perpendicular to the corresponding point of the radiation surface 120 is θ1, and the direction of light refracted by the radiation surface 120 is 98. ) And the angle formed by the normal line n perpendicular to the corresponding point of the radiation surface 120 is θ2, and the light is refracted by the radiation surface 120 such that θ2 is smaller than θ1.

Therefore, the amount of light emitted from the upper side 126 of the radiation surface 120 is greater than the amount of light emitted from the lower side 121.

In addition, a planar portion 130 extending from the curved surface of the radiation surface 120 to the upper side and the surface from which light is emitted may be further formed. As shown in FIG. 3, in the planar portion 130, the emitted light is refracted in a direction toward the lower side 121 of the radiation surface 120. Therefore, the light emitted from the lens 100 may be concentrated in the upper part of the irradiation angle range.

Meanwhile, the incident surface 110 through which light is incident from the light source 90 may also be formed to be inclined. In more detail, as shown in FIG. 4, the normal n perpendicular to the incident surface 110 is inclined toward the lower side.

Therefore, the light incident from the light source 90 is incident on the incident surface 110 at an angle of an upper range than an angle perpendicular to the incident surface 110 of the irradiation angle range of the light incident on the incident surface 110. Light is refracted toward the upper side of the lens 100, and light incident at an angle in the lower range is refracted toward the lower side of the lens 100.

That is, the angle formed between the original traveling direction 97 of light and the normal line n perpendicular to the corresponding point of the incident surface 110 is called θ3, and the traveling direction of light refracted by the incident surface 110 is 99. ) And the angle formed by the normal line n perpendicular to the corresponding point of the incident surface 110 is θ4, and light is refracted at the incident surface such that θ4 is larger than θ3.

However, since the incidence surface 110 is inclined so that the normal line n faces the lower side, the amount of light refracted toward the upper side of the light incident on the incidence surface 110 and refracted is greater than the amount refracted to the lower side.

In addition, the lens 100 is formed to have a longitudinal direction in the transverse direction, as shown in FIG. In addition, both side surfaces 140 of the lens 100 may be formed in a plane such that a plurality of lenses are continuously connected to each other.

Therefore, as illustrated in FIG. 6, the amount of light emitted by the incident surface 110 and the radiation surface 120 toward the upper range of the irradiation angle range becomes larger. In addition, since the light directed toward the upper side of the lens 100 is refracted by the plane portion 130 in a direction that the plane of the plane portion 130 faces, the plane portion 130 of the lens 100 is desired. The amount of light can be concentrated in the viewing direction.

Hereinafter, an embodiment of a light source module of a road lighting apparatus using the bar type lens of the asymmetric cross section according to the present invention will be described.

As shown in FIG. 7, the light source module 200 of the road lighting apparatus according to the present embodiment may include a light source 90, a bar type lens 100 having an asymmetrical cross section, and a heat sink 210.

The light source 90 may be formed to have a longitudinal direction in the horizontal direction. In addition, the light source 90 may be formed of a substrate 94 in which a plurality of LED elements 92 are arranged in a horizontal direction. Of course, the present invention is not limited thereto, and other types of light sources other than LEDs may be used.

The bar type lens 100 of the asymmetrical cross-section is substantially the same as the bar type lens 100 of the asymmetrical cross-section of the above-described embodiment, is formed to have the same longitudinal direction as the light source 90, and the lens 100 ) Will be replaced with the description of the bar type lens 100 of the asymmetric cross-section described above.

At this time, both sides of the lens 100 are formed in a plane, the lens 100 of a predetermined length can be made to form a bar type lens group of longer length asymmetric cross-section is connected to each other.

The heat sink 210 is formed such that the light source 90 has the same longitudinal direction as the longitudinal direction, the light source 90 is received in a contiguous manner on the front surface, and a portion of the portion where the light source 90 is accommodated. On the upper side and the lower side, a lens coupling groove 212 in which the lens 100 can be coupled in a sliding manner is formed along the longitudinal direction.

In addition, the rear surface is formed so that the heat radiation fin 214 for radiating heat conducted from the light source 90 extends upward.

In addition, a flange portion 216 extending a predetermined length toward the front surface of the heat sink 210 may be formed.

On the other hand, the light source module 200 for a street lamp made as described above may be provided to enable the angle adjustment inside the housing 300 forming the appearance.

In order to enable the angle adjustment of the light source module 200 for a street lamp as described above, mounts 220 rotatably supporting both ends of the light source module 200 for the street light are provided at both sides of the housing 300. Each may be provided.

The mount 220 includes a fixed plate 222 fixed to the housing 300, and a rotating plate 226 rotatably coupled to the fixed plate 222, and capable of fixing an angle for each predetermined tool. Can be done.

That is, a plurality of first protrusions 224 are formed on one surface of the fixing plate 222, and the one surface of the rotating plate 226 is disposed to face one surface of the fixing plate 222 on which the first protrusion 224 is formed. A plurality of second protrusions 228 meshed with the first protrusions 224 are formed.

Therefore, when the rotating plate 226 is pressed to the fixing plate 222, the angle of the rotating plate 226 is fixed by the first protrusion 224 and the second protrusion 228, the external rotation of the rotating plate ( When a rotational force of a predetermined force or more is applied to the 226, the second rotating plate 226 is rotated by the elasticity of the second rotating plate 226 to adjust the angle.

In addition, the outer circumferential surface of the rotating plate 226 is formed with a coupling portion 229 extending to overlap with the flange 216 of the heat sink 210, the flange 216 and the rotating plate 226 of the heat sink 210 Coupling unit 229 of the screw is coupled to the street light source module 200 for adjustable angle.

On the other hand, the housing 300 is the lid 310 is rotatably coupled to the upper side to enable the detachable of the light source module 200 for the street light, the front of the light so as to transmit the light source module 200 for the street light. The transparent window 320 is provided.

The light source module 200 for the street lamp as described above is not installed on a separate pole, and as shown in FIG. 8, the road railing 30 installed on the side of the road 20, a bridge rail or a guide rail or a central separator It may be installed at predetermined intervals along the road.

When installed on the railing 30 or the guide rail as described above, the installation height of the light source module 200 for the street light is to be installed at a position lower than the eye height of the driver, more preferably within 1.5 m or less from the road surface. desirable.

Therefore, by illuminating the street light source module 200 to illuminate only the road at a low position on the road railings, the distance between the street light source module 200 and the road surface 20 is shortened so that the road users such as drivers and pedestrians can be shortened. You can improve the brightness of the road as well as prevent light reflections from obstructing your vision.

In addition, as shown in Figure 6, since the amount of light is concentrated in a predetermined range on the upper side of the irradiation angle range of the light source module for the street light, it is possible to more brightly illuminate a point far from the installed place, to make the road more uniform Can be.

In addition, the portion provided with the transparent window 320 may reflect the light of the headlights of the car, it may be formed to be inclined toward the road surface, so that the reflected light does not obstruct the view of the front driver toward the front. Therefore, even if the light of the automobile headlight is reflected from the transparent window 320, since the light reflected by the inclination of the transparent window 320 is directed toward the road surface, not only does not disturb the vision of another driver in front of the reflection, The light shines on the road surface, which makes the road surface brighter.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

Claims

Has a longitudinal direction on one side,

An incident surface formed to receive light emitted from a light source provided at a rear side thereof;

The light incident on the incidence surface is formed on the opposite side of the incidence surface, and the light incident on the incidence surface is radiated toward the road surface. Radiating surface formed of an asymmetrical cross-section so that the amount of light is concentrated toward the place;

Bar type lens of the asymmetric cross section comprising a.
The method of claim 1,

The radial surface is,

A bar type lens having an asymmetrical cross section, wherein the radius of curvature of the upper side is formed to have a cross section of a shape shorter than the radius of curvature of the lower side.
The method of claim 1,

The radial surface is,

A bar type lens having an asymmetrical cross section, wherein a center of curvature of the upper side is positioned below a center of curvature of the lower side.
The method of claim 1,

A bar type lens having an asymmetrical cross-section extending to an upper side of the radiation surface, wherein the plane is a flat surface is a plane that the light is emitted.
A light source which emits light and has a longitudinal direction in a transverse direction;

It is provided along the road, has a longitudinal direction in the transverse direction,

An incident surface is formed on the rear surface to receive the light emitted from the light source,

The light incident on the incidence surface is formed on the opposite side of the incidence surface, and the light incident from the incidence surface is emitted toward the road surface, and the distance from the installation point to the road surface is far from the installation because the amount of light emitted from the upper side is greater than the amount of light emitted from the lower side. A bar-type lens having an asymmetrical cross section configured to have a radiation surface formed of an asymmetrical cross section so that light quantity is concentrated toward the place;

Light source module of the road lighting apparatus comprising a.
The method of claim 5,

The radial surface is,

The light source module of the road lighting apparatus, characterized in that the center of curvature of the upper side is located below the center of curvature of the lower side.
The method of claim 5,

The light source module of the road lighting apparatus, characterized in that the plane portion extending to the upper side of the curved radiation surface, the plane is a plane that the light is emitted is further formed.
The method of claim 5,

The incident surface is,

The light source module of the road lighting apparatus, characterized in that the normal perpendicular to the incident surface is formed to be inclined toward the road surface.
The method of claim 5,

A heat sink coupled to a rear surface of the bar-type lens of the asymmetrical cross section, connected to the light source, and having a heat dissipation fin formed on the rear surface thereof extending upward to radiate heat generated from the light source; Light source module of the lighting device.