KR101696367B1

KR101696367B1 - Diffusion Lens for LED lighting

Info

Publication number: KR101696367B1
Application number: KR1020150075184A
Authority: KR
Inventors: 권영국; 김태연; 남상길; 김푸름
Original assignee: 주식회사 씨앤지옵틱
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2017-01-16
Also published as: KR20160141154A

Abstract

The present invention relates to a diffusion lens for an LED illumination comprising a lens body for accommodating a plurality of LEDs and an incident groove formed in the lens body so as to correspond to the lens body such that a plurality of LEDs are located inside the lens body .

Description

[0001] Diffusion Lens for LED lighting [0002]

The present invention relates to a diffusion lens for controlling light distribution for light emitted by an LED.

Illuminations such as billboard lights, flat panel lights, fluorescent lamps, street lights, road light fixtures and the like are installed for the purpose of emitting light in indoor or outdoor for a predetermined purpose. In this illumination, a light source for emitting light is provided.

In recent years, the business of replacing a light source installed in a light source with an LED (Light Emitting Diode) has been actively carried out. LED is not only an environmentally friendly, high-efficiency, long-life light source, but also a light source that can save energy and save energy.

For example, we recently invested about 2 billion won in Yanggu-gun, Gangwon-do to replace the light source installed in existing street lighting with LED, and more than 600 cities in the US replaced the light source installed in existing street lighting with LED . In addition to lighting for street lamps, fluorescent lamps using conventional fluorescent lamps have also been replaced by LEDs. Fluorescent lamps that use LED as a light source are attracting attention as so-called EL light.

In this way, projects for realizing illumination (hereinafter referred to as "LED illumination") using LED as a light source both domestically and globally are being actively conducted.

Here, due to the light distribution characteristic of the LED forming the Lambertian distribution, the LED illumination according to the related art is implemented to control the light distribution for the light emitted by the LED using the lens.

However, in the case of implementing the LED illumination using a plurality of LEDs, since the LED illumination according to the related art requires a lens for each of the plurality of LEDs, a plurality of lenses are required by the number of the plurality of LEDs, .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a diffusing lens for an LED illumination capable of reducing a construction cost for controlling light distribution for light emitted by a plurality of LEDs of an LED illumination.

In order to solve the above problems, the present invention may include the following configuration.

A diffusion lens for an LED illumination according to the present invention includes: a lens body formed in a closed loop shape to accommodate a plurality of LEDs; And an incident groove formed in the form of a ring closed along the lens body such that a plurality of LEDs are positioned inside the lens body. Wherein the lens body includes an incident surface on which light emitted by the LEDs located in the incident groove is incident and an exit surface through which light passing through the incident surface is emitted to the outside, And may be formed in the form of a closed loop along the body.

A diffusion lens for an LED illumination according to the present invention comprises: a lens body formed in a straight line to accommodate a plurality of LEDs; And an incident groove formed in a straight line along the lens body so that a plurality of LEDs are positioned inside the lens body. Wherein the lens body includes an incident surface on which light emitted by the LEDs located in the incident groove is incident and an exit surface through which light passing through the incident surface is emitted to the outside, And may be formed in a straight line along the body.

The diffusion lens for LED illumination according to the present invention includes a lens body for accommodating a plurality of LEDs; An incident groove formed in the lens body such that a plurality of LEDs are positioned inside the lens body; And a scattering part coupled to the lens body. The lens body may include an incident surface through which the light emitted by the LEDs located in the incident groove is incident, and an exit surface through which the light passing through the incident surface is emitted to the outside. Wherein the scattering portion includes a plurality of scattering members coupled to the lens body to scatter light passing through the exit surface, wherein the scattering members are spaced from each other so as to be positioned on an optical axis of light emitted by each of the LEDs, May be coupled to the body.

According to the present invention, the following effects can be achieved.

The present invention can reduce the construction cost for controlling the light distribution for the light emitted by a plurality of LEDs of the LED illumination, thereby enhancing the product competitiveness.

1 is a schematic plan view of an LED illumination to which a diffusion lens for LED illumination according to the present invention is applied
FIG. 2 is a schematic cross-sectional view of the LED illumination using the diffusion lens for LED illumination according to the present invention,
3 is a schematic perspective view of a diffusion lens for an LED illumination according to the present invention.
4 and 5 are schematic cross-sectional views of the diffusion lens for LED illumination according to the present invention, taken along the line II-II in FIG. 3
6 is a schematic bottom view of a diffusion lens for an LED illumination according to the present invention
7 is a schematic perspective view of an LED illumination to which a diffusion lens for LED illumination according to a modified embodiment of the present invention is applied.
FIGS. 8 and 9 are schematic cross-sectional views of the LED illumination using the diffusion lens for LED illumination according to a modified embodiment of the present invention, taken along the line III-III in FIG. 7
10 is a schematic bottom view of a diffusion lens for LED illumination according to a modified embodiment of the present invention
11 is a schematic cross-sectional view of the LED illumination using the diffusion lens for LED illumination according to a modified embodiment of the present invention, taken along line III-III in FIG. 11

Hereinafter, embodiments of the diffusion lens for LED illumination according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the diffusion lens 1 for LED illumination according to the present invention includes a plurality of light emitting diodes (LEDs) 200 (shown in FIG. 2) To control the light distribution to the light. The LED light 100 may be a billboard light, a flat light, a fluorescent light, a street light, a road light, and the like. A plurality of LEDs 200 are mounted on the substrate 110 (shown in FIG. 2).

The diffusing lens 1 for LED illumination according to the present invention includes a lens body 2 for accommodating a plurality of LEDs 200 and a plurality of LEDs 200 disposed inside the lens body 2, (3) formed on the substrate (2). The lens body 2 controls light distribution for light emitted by a plurality of LEDs 200 to diffuse the light emitted by the plurality of LEDs 200 located in the incidence groove 3.

Therefore, the diffusion lens 1 for LED illumination according to the present invention is commonly used for a plurality of LEDs 200 of the LED illumination 100 to control the light distribution characteristic, The construction cost for controlling the light distribution to the light emitted by the LEDs 200 can be reduced and the product competitiveness can be enhanced.

Hereinafter, the lens body 2 and the incidence groove 3 will be described in detail with reference to the accompanying drawings.

1 to 4, the lens body 2 forms the overall appearance of the diffusion lens 1 for LED illumination according to the present invention. A plurality of LEDs 200 are disposed in the lens body 2. The lens body 2 is coupled to a substrate 110 (shown in FIG. 2) on which a plurality of LEDs 200 are mounted. A plurality of LEDs 200 are mounted on the substrate 110 so as to be spaced apart from each other by a predetermined distance. The lens body 2 may be coupled to the substrate 110 through an adhesive tape or the like. The lens body 2 may be coupled to the substrate 110 through a separate holder (not shown).

The lens body 2 may be formed in a closed loop shape. In this case, the lens body 2 may have a through hole 2a (shown in FIG. 3). The through hole (2a) is formed through the lens body (2). The lens body 2 may be formed in a closed loop shape so that the through hole 2a is located on the inner side. When the lens body 2 is formed in a closed loop shape, the plurality of LEDs 200 are mounted on the substrate 110 so as to be spaced apart from each other by a predetermined distance along the shape of the lens body 2.

For example, the lens body 2 may be formed in a circular ring shape. In this case, the lens body 2 may be formed with a circular through hole 2a. The plurality of LEDs 200 are mounted on the substrate 110 so as to be separated from each other by a predetermined distance along a circular ring shape. The substrate 110 may be formed in a circular ring shape corresponding to the lens body 2. The substrate 110 may be formed in a circular disc shape.

For example, the lens body 2 may be formed in an elliptical ring shape. In this case, the lens body 2 may have an elliptical through hole 2a. The plurality of LEDs 200 are mounted on the substrate 110 so as to be spaced from each other by a predetermined distance along an elliptical ring shape. The substrate 110 may be formed in an elliptical annular shape corresponding to the lens body 2. The substrate 110 may be formed in an elliptical disc shape.

In the case where the lens body 2 is formed in a closed loop shape as described above, the diffusing lens 1 for LED illumination according to the present invention is formed in such a manner that the through hole 2a is formed in the lens body 2, The light emitted by the plurality of LEDs 200 in the outer direction of the lens body 2 can be diffused. Accordingly, the diffusion lens 1 for LED illumination according to the present invention can be implemented so as to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100. [ The diffuse lens 1 for LED illumination according to the present invention can increase the number of LED lights 100 required to illuminate a predetermined space by increasing the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200 Can contribute to the reduction.

Referring to Figs. 1 to 4, the incidence groove 3 (shown in Fig. 4) is formed in the lens main body 2. The incident groove 3 may be formed in the bottom surface 2b of the lens body 2 (shown in Fig. 4). The bottom surface 2b is a surface facing the substrate 110 when the lens body 2 is coupled to the substrate 110 (shown in Fig. 2). The incident groove 3 is formed in the lens body 2 so as to be recessed from the bottom surface 2b. The incident groove 3 may be formed to have a maximum depth in the optical axis 300 (shown in FIG. 4) of the light emitted by the plurality of LEDs 200. 4, the optical axis 300 refers to a vertical axis direction (Z-axis direction, shown in FIG. 4) of the plurality of LEDs 200 facing downward. The incidence groove 3 may be formed to be gradually reduced in size from the bottom surface 2b toward the recessed direction (indicated by arrow A in FIG. 4). The direction of the depression (arrow A direction) is the direction from the substrate 110 to the lens body 2 when the lens body 2 is coupled to the substrate 110 (shown in Fig. 2) .

The incident groove 3 is formed to have a larger size than the LED 200 so that the LED 200 can be positioned inside the lens body 2. In the case where the LED 200 is formed of a molding part that accommodates an LED chip and an LED chip, the incident groove 3 may be formed to have a larger size than the sum of the LED chip and the molding part.

The incident groove 3 is formed in the lens body 2 such that a plurality of LEDs 200 are positioned inside the lens body 2. The lens body 2 may be coupled to the substrate 110 such that a plurality of LEDs 200 are positioned in the incident groove 3. The incidence grooves 3 may be formed in a shape corresponding to the shape of the lens body 2. When the lens body 2 is formed in the shape of a closed loop, the incidence groove 3 may be formed in the shape of a ring closed along the lens body 2.

For example, when the lens body 2 is formed in a circular ring shape, the incident groove 3 may be formed in a circular ring shape along the lens body 2. For example, when the lens body 2 is formed in the shape of an elliptical ring, the incidence groove 3 may be formed in an elliptical ring shape along the lens body 2.

1 to 4, the lens body 2 includes an incident surface 21 on which light emitted by a plurality of LEDs 200 located in the incident groove 3 is incident.

The incident surface 21 is a surface forming the inner surface of the lens body 2 as the incident groove 3 is formed in the lens body 2. The light emitted by the plurality of LEDs 200 is incident on the lens body 2 through the incident surface 21 and passes through the lens body 2 to the outside of the lens body 2 . The incident surface 21 is formed in a shape corresponding to the incident groove 3. The incident surface 21 is formed to be connected to the bottom surface 2b (shown in FIG. 4). The incident surface 21 may be formed as a curved surface.

The incident surface 21 may be formed in a shape corresponding to the shape of the lens body 2. When the lens body 2 is formed in a closed loop shape, the incident surface 21 may be formed in a ring shape closed along the lens body 2.

For example, when the lens body 2 is formed in a circular ring shape, the incident surface 21 may be formed in a circular ring shape along the lens body 2. For example, when the lens body 2 is formed in an elliptical annular shape, the incident surface 21 may be formed in an elliptical annular shape along the lens body 2.

The incidence surface 21 may include a first incidence surface 211 (shown in FIG. 4) whose curvature decreases toward the optical axis 300 (shown in FIG. 4).

The first incident surface 211 may be formed such that the curvature thereof decreases as the optical axis 300 approaches the depressing direction (direction of arrow A). The light emitted from the plurality of LEDs 200 and incident on the lens body 2 through the first incident surface 211 is incident on the lens body 2 and is transmitted through the optical axis 300 As shown in Fig. In this case, the light incident into the lens body 2 through the first incident surface 211 passes through a portion of the first incident surface 211 located close to the bottom surface 2b The smaller the angle, the more refracted. Conversely, the light that is incident on the lens body 2 through the first incident surface 211 passes through the portion located closer to the optical axis 300 from the first incident surface 211, It can be refracted at a large angle.

The first incident surface 211 may be formed symmetrically with respect to the optical axis 300. The light incident on the lens body 2 through the first incident surface 211 is diffused outward with respect to the optical axis 300 while being incident on the lens body 2.

The incident surface 21 may include a second incident surface 212 (shown in FIG. 4) that is connected to the first incident surface 211 and the bottom surface 2b, respectively.

The second incident surface 212 has one side connected to the bottom surface 2b and the other side connected to the first incident surface 211. The second incident surface 212 is formed so that the center of curvature (not shown) is located in the lens body 2. [ In this case, the first incident surface 211 is formed so that the center of curvature (not shown) is located in the incident groove 3. The light emitted from the plurality of LEDs 200 and incident on the lens body 2 through the second incident surface 212 is incident on the lens body 2 while passing through the optical axis 300 As shown in Fig. That is, light passing through the second incident surface 212 and light passing through the first incident surface 211 are refracted in directions opposite to each other.

Accordingly, the diffuse lens 1 for LED illumination according to the present invention can be implemented to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100. [ The diffuse lens 1 for LED illumination according to the present invention can increase the number of LED lights 100 required to illuminate a predetermined space by increasing the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200 Can contribute to the reduction. The second incident surface 212 may be formed symmetrically with respect to the optical axis 300.

1 to 5, the lens body 2 includes an exit surface 22 through which light that has passed through the incident surface 21 is emitted to the outside.

The exit surface (22) is the surface forming the outer surface of the lens body (2). The light emitted by the plurality of LEDs 200 is incident on the lens body 2 through the incident surface 21 and then passes through the lens body 2 and the exit surface 22 And is discharged to the outside. The emitting surface 22 may be formed as a curved surface.

The exit surface 22 may be formed in a shape corresponding to the shape of the lens body 2. When the lens body 2 is formed in the form of a closed loop, the emission surface 22 may be formed in the shape of a ring closed along the lens body 2.

For example, when the lens body 2 is formed in the form of a circular ring, the emission surface 22 may be formed in the shape of a circular ring along the lens body 2. For example, when the lens body 2 is formed in an elliptical annular shape, the emission surface 22 may be formed in an elliptical annular shape along the lens body 2. [

The exit surface 22 may include a first exit surface 221 (shown in FIG. 5) that increases in curvature toward the optical axis 300 (shown in FIG. 4).

The first exit surface 221 may be formed in such a manner that the curvature increases as the optical axis 300 approaches the depressing direction (direction of arrow A). The light emitted from the plurality of LEDs 200 and emitted to the outside of the lens body 2 through the first exit surface 221 is emitted to the outside of the lens body 2, (300). In this case, light emitted to the outside of the lens body 2 through the first exit surface 221 passes through a portion located close to the bottom surface 2b from the first exit surface 221 The smaller the angle, the more refracted. Conversely, the light emitted from the first exit surface 221 to the outside of the lens body 2 through the first exit surface 221 passes through a portion located close to the optical axis 300 It can be refracted at a large angle.

The first exit surface 221 may be formed symmetrically with respect to the optical axis 300. The light emitted to the outside of the lens body 2 through the first exit surface 221 is diffused outward with respect to the optical axis 300 while being emitted to the outside of the lens body 2.

Referring to FIG. 5, the emitting surface 22 may include a second emitting surface 222 formed on the optical axis 300.

The second exit surface 222 is formed to be connected to the first exit surface 221. The second exit surface 222 may be located inside the first exit surface 221. The second exit surface 222 is formed so that the center of curvature (not shown) is located outside the lens body 2. [ In this case, the first exit surface 221 is formed so that the center of curvature (not shown) is located in the lens body 2 or the incidence groove 3. The light emitted from the plurality of LEDs 200 and emitted to the outside of the lens body 2 through the second exit surface 222 is emitted to the outside of the lens body 2, (300). In this case, light emitted to the outside of the lens body 2 through the second exit surface 222 is incident on the light emitted to the outside of the lens body 2 through the first exit surface 221 And is refracted at a larger angle than that of FIG.

Accordingly, the diffuse lens 1 for LED illumination according to the present invention can be implemented to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100. [ The diffuse lens 1 for LED illumination according to the present invention can increase the number of LED lights 100 required to illuminate a predetermined space by increasing the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200 Can contribute to the reduction. The second exit surface 222 may be formed symmetrically with respect to the optical axis 300.

Referring to Figs. 1 to 6, the diffusion lens 1 for LED illumination according to the present invention may include a scattering portion 4 (shown in Fig. 6).

The scattering unit 4 is coupled to the lens body 2. The scattering section 4 includes a plurality of scattering members 41 (shown in Fig. 6). The scattering members 41 scatter light passing through the exit surface 22. The scattering members 41 are separated from each other and are coupled to the lens body 2 so as to be positioned on the optical axis 300 of light emitted by each of the plurality of LEDs 200. The scattering members 41 scatter the light emitted along the optical axis 300 of each of the plurality of LEDs 200 so that the light emitted along the optical axis 300 of each of the plurality of LEDs 200 The amount of light can be reduced.

Therefore, the diffusion lens 1 for LED illumination according to the present invention can achieve the following operational effects.

First, the diffusing lens 1 for LED illumination according to the present invention focuses the light emitted from each of the plurality of LEDs 200 on a part of the plurality of LEDs 200 located on the optical axis 300 in the illumination area, The degree of irradiation can be reduced. Accordingly, the diffusion lens 1 for LED illumination according to the present invention can improve the uniformity of the amount of light emitted from the plurality of LEDs 200 to the illumination region.

The diffuse lens 1 for LED illumination according to the present invention differs from the diffuser lens 1 according to the present invention in that a plurality of LEDs 200 are arranged in the outer side due to a difference in light quantity of light emitted from the lens body 2 during light emission from the plurality of LEDs 200, Can be prevented from being identified. Therefore, the diffusion lens 1 for LED illumination according to the present invention can prevent deterioration of aesthetics of the LED illumination 100 due to a difference in light amount during the emission of light from the plurality of LEDs 200 have.

Third, the diffusion lens 1 for LED illumination according to the present invention is configured such that the light emitted from the LED light 100 through the scattering members 41 coupled to the lens body 2, while the light is not emitted from the plurality of LEDs 200, It is possible to improve the aesthetics of the outer appearance. For example, when a plurality of LEDs 200 are mounted on the substrate 110 so as to be spaced apart from each other at equal intervals, the scattering members 41 are spaced from each other at equal intervals in the lens body 2, ). &Lt; / RTI > In this case, the diffusion lens 1 for LED illumination according to the present invention can improve the aesthetics of the appearance of the LED illumination 100 through the regularly arranged scattering members 41.

Each of the scattering members 41 may be formed in a size and shape substantially coinciding with the LED 100. The scattering members 41 may be formed to have a larger size than the LED 100. 6, the scattering members 41 are formed in a rectangular shape, but are not limited thereto. The scattering members 41 may be formed on the optical axis 300 of each of the plurality of LEDs 200 And may be formed in other shapes such as a circular shape, an elliptical shape, and the like in a form capable of scattering light.

The scattering members 41 may be manufactured in the form of a tape having adhesiveness. In this case, the scattering members 41 may be attached to the lens body 2 such that the scattering members 41 are positioned at positions corresponding to the plurality of LEDs 200, respectively. The scattering members 41 may be implemented using a scattering agent. In this case, the scattering members 41 may be filled in the lens body 2 at positions corresponding to the plurality of LEDs 200, thereby realizing the scattering unit 4. Each of the scattering members 41 may be formed by forming a plurality of protrusions on a portion of the lens body 2 corresponding to the plurality of LEDs 200.

1 to 6, in the diffusion lens 1 for LED illumination according to the present invention, the lens body 2 may be provided with a flange 23. The flange 23 may be formed on the lens body 2 so as to protrude inward from the lens body 2 toward the through hole 2a. The diffusing lens 1 for LED illumination according to the present invention can increase the bonding area where the lens body 2 is coupled to the substrate 110 so that the diffusion lens 1 can be firmly coupled to the substrate 110, 100). The bottom surface of the flange 23 and the bottom surface 2b of the lens body 2 may be formed to be planar. The flange 23 may be formed on the lens body 2 so as to protrude outwardly from the lens body 2 in the inward direction. The lens body 2 may include both the inwardly projecting flange 23 and the outwardly projecting flange 23.

The flange 23 may be formed in a shape corresponding to the shape of the lens body 2. When the lens body 2 is formed in the form of a closed loop, the flange 23 may be formed in the shape of a ring closed along the lens body 2. For example, when the lens body 2 is formed in the shape of a circular ring, the flange 23 may be formed in the shape of a circular ring along the lens body 2. For example, when the lens body 2 is formed in an elliptical annular shape, the flange 23 may be formed in an elliptical annular shape along the lens body 2.

In the above description, the lens body 2 is formed in a closed loop shape. However, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention includes the lens body 2 formed in a straight line can do. Hereinafter, the diffusion lens 1 for LED illumination according to a modified embodiment of the present invention will be described in detail with reference to the accompanying drawings. In describing the diffusing lens 1 for LED illumination according to a modified embodiment of the present invention, the differences will be mainly described.

Referring to FIGS. 7 and 8, the lens body 2 may be formed in a straight line. For example, the lens body 2 may be formed as a straight line in the form of a bar. When the lens body 2 is formed in a straight line, the plurality of LEDs 200 are mounted on the substrate 110 so as to correspond to the shape of the lens body 2 and spaced apart from each other by a predetermined distance.

In the case where the lens body 2 is formed in a straight line, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can obtain the following operational effects.

First, the diffusing lens 1 for LED illumination according to a modified embodiment of the present invention emits a plurality of LEDs 200 in both directions of the lens body 2 with respect to a straight line formed by the lens body 2 The light can be diffused. Accordingly, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can be implemented to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100 .

Secondly, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention increases the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200, 100). &Lt; / RTI >

Third, since the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can produce the lens body 2 through extrusion molding, not only the easiness of manufacturing can be improved, but also the manufacturing cost can be reduced have.

Fourth, since the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can easily adjust the length of the lens body 2 through attachment or cutting along a straight line formed by the lens body 2, The size of the illumination area can be easily adjusted as needed.

7 and 8, the incidence grooves 3 may be formed in a straight line corresponding to the shape of the lens main body 2. The incident grooves 3 may be formed through both ends of the lens main body 2 along a straight line formed by the lens main body 2. In this case, the lens body 2 may be formed so that both ends thereof communicate with the outside through the incidence groove 3. Accordingly, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention can discharge the heat generated by the plurality of LEDs 200 to the both ends of the lens body 2 while emitting light. Therefore, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention can prevent damage or breakage of the plurality of LEDs 200 due to heat, and can prevent the use of the plurality of LEDs 200 The life span can be increased.

Referring to FIGS. 7 and 8, the lens body 2 includes the incident surface 21. The incident surface 21 may be formed in a straight line corresponding to the shape of the lens body 2.

The incident surface 21 may include the first incident surface 211. The first incident surface 211 may be formed such that the curvature thereof decreases as the optical axis 300 approaches the depressing direction (direction of arrow A). The light emitted from the plurality of LEDs 200 and incident on the lens body 2 through the first incident surface 211 is incident on the lens body 2 and is transmitted through the optical axis 300 As shown in Fig. In this case, the light incident into the lens body 2 through the first incident surface 211 passes through a portion of the first incident surface 211 located close to the bottom surface 2b The smaller the angle, the more refracted. Conversely, the light that is incident on the lens body 2 through the first incident surface 211 passes through the portion located closer to the optical axis 300 from the first incident surface 211, It can be refracted at a large angle.

The first incident surface 211 may be formed symmetrically with respect to the optical axis 300. The light incident on the lens body 2 through the first incident surface 211 is diffused toward both sides of the optical axis 300 while being incident on the lens body 2.

The incident surface 21 may include the second incident surface 212. The second incident surface 212 is formed so that the center of curvature (not shown) is located in the lens body 2. [ In this case, the first incident surface 211 is formed so that the center of curvature (not shown) is located in the incident groove 3. The light emitted from the plurality of LEDs 200 and incident on the lens body 2 through the second incident surface 212 is incident on the lens body 2 while passing through the optical axis 300 As shown in Fig. That is, light passing through the second incident surface 212 and light passing through the first incident surface 211 are refracted in directions opposite to each other.

Therefore, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can be implemented to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100. [ The diffuse lens 1 for LED illumination according to the modified embodiment of the present invention can be realized by increasing the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200, 100). &Lt; / RTI > The second incident surface 212 may be formed symmetrically with respect to the optical axis 300.

Referring to FIGS. 7 and 8, the lens body 2 includes the exit surface 22. The exit surface 22 may be formed in a straight line corresponding to the shape of the lens body 2.

The emission surface 22 may include the first emission surface 221. The first exit surface 221 may be formed in such a manner that the curvature increases as the optical axis 300 approaches the depressing direction (direction of arrow A). The light emitted from the plurality of LEDs 200 and emitted to the outside of the lens body 2 through the first exit surface 221 is emitted to the outside of the lens body 2, (300). In this case, light emitted to the outside of the lens body 2 through the first exit surface 221 passes through a portion located close to the bottom surface 2b from the first exit surface 221 The smaller the angle, the more refracted. Conversely, the light emitted from the first exit surface 221 to the outside of the lens body 2 through the first exit surface 221 passes through a portion located close to the optical axis 300 It can be refracted at a large angle.

The first exit surface 221 may be formed symmetrically with respect to the optical axis 300. The light emitted to the outside of the lens body 2 through the first exit surface 221 is diffused to both sides with respect to the optical axis 300 while being emitted to the outside of the lens body 2.

Referring to FIG. 9, the emitting surface 22 may include the second emitting surface 222. The second exit surface 222 is formed to be connected to the first exit surface 221. The second exit surface 222 may be located inside the first exit surface 221. The second exit surface 222 is formed so that the center of curvature (not shown) is located outside the lens body 2. [ In this case, the first exit surface 221 is formed so that the center of curvature (not shown) is located in the lens body 2 or the incidence groove 3. The light emitted from the plurality of LEDs 200 and emitted to the outside of the lens body 2 through the second exit surface 222 is emitted to the outside of the lens body 2, (300). In this case, light emitted to the outside of the lens body 2 through the second exit surface 222 is incident on the light emitted to the outside of the lens body 2 through the first exit surface 221 And is refracted at a larger angle than that of FIG.

Therefore, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can be implemented to irradiate light with a larger amount of light for a wider illumination area, thereby enhancing the illumination function for the LED illumination 100. [ The diffuse lens 1 for LED illumination according to the modified embodiment of the present invention can be realized by increasing the size of the illumination area irradiated with the light emitted by the plurality of LEDs 200, 100). &Lt; / RTI > The second exit surface 222 may be formed symmetrically with respect to the optical axis 300.

Referring to FIGS. 7 to 10, the diffusion lens 1 for LED illumination according to a modified embodiment of the present invention may include the scattering portion 4 (shown in FIG. 10). The scattering unit 4 is coupled to the lens body 2. The scattering unit 4 includes a plurality of scattering members 41. The scattering members (41) scatter light passing through the exit surface (22). The scattering members 41 are separated from each other and are coupled to the lens body 2 so as to be positioned on the optical axis 300 of light emitted by each of the plurality of LEDs 200. The scattering members 41 may be separated from each other along a straight line formed by the lens body 2 and may be coupled to the lens body 2. The scattering members 41 scatter the light emitted along the optical axis 300 of each of the plurality of LEDs 200 so that the light emitted along the optical axis 300 of each of the plurality of LEDs 200 The amount of light can be reduced.

Therefore, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can achieve the following operational effects.

First, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention is configured such that light emitted from each of the plurality of LEDs 200 is incident on the optical axis 300 of each of the plurality of LEDs 200 in the illumination region It is possible to reduce the degree of intensively irradiated portions. Therefore, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention can improve the uniformity of the amount of light irradiated to the illumination area by the light emitted from the plurality of LEDs 200.

Second, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention differs from the first embodiment in that, while light is emitted from the plurality of LEDs 200, a difference in the amount of light emitted from the lens body 2 It is possible to prevent the position of each of the LEDs 200 from being identified. Accordingly, while the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention emits light from the plurality of LEDs 200, the aesthetics of the appearance of the LED illumination 100 is deteriorated Can be prevented.

Thirdly, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention is configured such that, while light is not emitted from the plurality of LEDs 200, the scattering member 41 coupled to the lens body 2 The aesthetics of the LED illumination 100 can be improved. For example, when a plurality of LEDs 200 are mounted on the substrate 110 so as to be spaced apart from each other at equal intervals, the scattering members 41 are spaced from each other at equal intervals in the lens body 2, ). &Lt; / RTI > In this case, the diffusion lens 1 for LED illumination according to the modified embodiment of the present invention can improve the aesthetics of the appearance of the LED illumination 100 through the regularly arranged scattering members 41.

Referring to FIGS. 7 to 10, in the diffusion lens 1 for LED illumination according to a modified embodiment of the present invention, the flange 23 may be formed on the lens body 2. The flange 23 may be formed on the lens body 2 so as to protrude in both lateral directions of the lens body 2. Accordingly, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention can increase the bonding area where the lens body 2 is coupled to the substrate 110, And may be combined to implement the LED illumination 100. The bottom surface of the flange 23 and the bottom surface 2b of the lens body 2 may be formed to be planar. The flange 23 may be formed in a straight line corresponding to the shape of the lens body 2.

Referring to FIG. 11, in the diffusion lens 1 for LED illumination according to a modified embodiment of the present invention, the lens body 2 may include a coupling member 24.

The coupling member 24 is coupled to the substrate 110 on which a plurality of LEDs 200 are mounted. The coupling member 24 may protrude from the bottom surface 2b of the lens body 2. [ The coupling member 24 and the lens body 2 may be integrally formed. The coupling member 24 may be formed to be connected to the flange 23.

The coupling member 24 may have a coupling groove 241 formed therein. Due to the engagement groove 241, the engaging member 24 and the bottom surface 2b of the lens body 2 are formed in a dip shape as a whole. The substrate 110 on which the plurality of LEDs 200 are mounted can be coupled to the coupling member 24 by being inserted into the coupling groove 241 by sliding movement. In addition, the substrate 110 on which the plurality of LEDs 200 are mounted can be separated from the coupling member 24 by being detached from the coupling groove 241 by sliding movement. Accordingly, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention can improve ease of assembling and disassembling operations of the substrate 110 on which the plurality of LEDs 200 are mounted.

The lens body 2 may include a plurality of the engaging members 24. The engaging members 24 may be formed on both sides of the lens body 2. In this case, the engaging members 24 may be formed on the lens body 2 such that the engaging grooves 241 face each other. Accordingly, the diffusing lens 1 for LED illumination according to the modified embodiment of the present invention is configured such that each end of the substrate 110 is inserted into the coupling grooves 241, thereby making the substrate 110 more rigid Lt; / RTI >

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

1: diffusion lens for LED illumination 2: lens body
3: incidence groove 4: spawning section
100: LED illumination 200: LED

Claims

A lens body formed in a closed loop shape to receive a plurality of LEDs; And
An incident groove formed inside the lens body in a ring shape closed along the lens body so that the LEDs are spaced apart from each other; And
And a plurality of scattering members coupled to the lens body for scattering light emitted by each of the LEDs,
Wherein the lens body includes an incident surface on which light emitted by the LEDs located in the incident groove is incident, and an exit surface through which light passing through the incident surface is emitted to the outside,
The incident surface and the emission surface are each formed in a ring shape closed along the lens body,
The scattering members are respectively coupled to the lens body on the optical axis of light emitted by the LEDs so as to be located at positions corresponding to the LEDs,
Wherein the scattering members are spaced apart from each other such that the scattering members are not located at positions corresponding to the spaces between the LEDs.

The method according to claim 1,
Wherein the lens body is formed in a circular ring-shaped or elliptical ring shape.

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The method according to claim 1,
Wherein the incident groove is formed on a bottom surface of the lens body and is formed to have a maximum depth in an optical axis of light emitted by the LEDs;
Wherein the incident surface includes a first incident surface whose curvature is decreased toward the optical axis of the light emitted by the LEDs.

5. The method of claim 4,
Wherein the incident surface includes a second incident surface formed to be connected to each of the first incident surface and the bottom surface of the lens body,
Wherein the first incident surface is formed so that a center of curvature thereof is located in the incident groove,
And the second incident surface is formed so that a center of curvature thereof is located in the lens body.

The method according to claim 1,
Wherein the exit surface includes a first exit surface that increases in curvature toward the optical axis of light emitted by the LEDs.

The method according to claim 6,
Wherein the emitting surface includes a second emitting surface formed on an optical axis of light emitted by the LEDs,
The second exit surface is formed so that a center of curvature thereof is located outside the lens body,
Wherein the first exit surface is formed so that a center of curvature thereof is located in the lens body or the incident groove.

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A lens body for accommodating a plurality of LEDs;
An incident groove formed in the lens body such that the LEDs are spaced apart from each other in the lens body; And
And a scattering portion coupled to the lens body,
Wherein the lens body includes an incident surface on which light emitted by the LEDs located in the incident groove is incident, and an exit surface through which light passing through the incident surface is emitted to the outside,
Wherein the scattering portion includes a plurality of scattering members coupled to the lens body for scattering light passing through the exit surface,
The scattering members are respectively coupled to the lens body on the optical axis of light emitted by the LEDs so as to be located at positions corresponding to the LEDs,
Wherein the scattering members are spaced apart from each other such that the scattering members are not located at positions corresponding to the spaces between the LEDs.

10. The method of claim 9,
Wherein the lens body includes a coupling member coupled to the substrate on which the LEDs are mounted,
Wherein the coupling member is formed with a coupling groove into which the substrate on which the LEDs are mounted is inserted.