KR101814016B1 - Led lamp - Google Patents

Abstract

An LED light is disclosed. The LED light of the present invention comprises: an LED module including a plurality of first LEDs arranged in a lateral direction and a plurality of second LEDs arranged in the lateral direction; and a control device detachably coupled to the bottom surface of the LED module through a fastening means and configured to reflect light of a backlight and a forward light among light emitted from the first LEDs and second LEDs. The control device includes: a first reflector which forms a rearwardly inclined surface from the rear side of the first LEDs toward the bottom side; a second reflector which forms a forwardly inclined surface from the front side of the first LEDs toward the bottom side; a third reflector which forms a rearwardly inclined surface from the rear side of the second LEDs toward the bottom side; and a fourth reflector which forms a forwardly inclined surface from the front side of the second LEDs toward the bottom side, wherein inclination angles of the first reflector and third reflector are 67 to 79 degrees and the inclination angles of the second reflector and fourth reflector are 45 degrees.

Description

LED light <LED LAMP>

The present invention relates to an LED illumination lamp, and more particularly, to an LED illumination lamp which can be used as a street lamp, a security lamp, and the like and includes an LED module including two or more LEDs, And an illuminating lamp capable of controlling the backlight.

Light emitting diodes (LEDs) have recently been used as an illumination light source because of their small size, low power consumption, and semi-permanent and environmentally friendly lifetime.

However, in the case of a large number of road lighting apparatuses (artificial lighting), there are many lights emitted in the direction of an area to be illuminated, and thus pollution caused by 'light pollution', that is, excessive or unnecessary light is becoming a big issue.

 If the artificial light is too bright or too bright, it may cause serious problems such as disturbance of natural ecosystem, deterioration of biorhythmic regulation and deterioration of physical / mental health if the nighttime condition is maintained as daytime. From April, 'Law on the Prevention of Light Pollution by Artificial Lighting' was promulgated and regulated by law.

In the 'Light Emission Allowance Criteria' according to the above-mentioned Light Pollution Prevention Act, the maximum vertical illuminance of the vertical surface of the window surface of the residence area adjacent to the area where the lighting facility is installed is set to be less than the value set according to the lighting environment management area.

Most of the light entering into the residence window is difficult to control by the backlight / front upward light (intrusion light) among the light emitted from the lighting device, the streetlight using the LED light source, An attempt has been made to mount a reflector for light control outside the luminaire to block light emitted in a direction outside the illumination area and further to control the path of the blocked light to enhance the horizontal surface illumination of the illumination area.

(0001) Korea Patent No. 10-1295341 (Registered on March 31, 2013) (0002) Korean Patent No. 10-1521846 (Registered on May 5, 2015)

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED illumination device including an LED module including LEDs arranged in two or more rows, by controlling transfer light and backlight emitted from LEDs, And the LED illumination light.

It is another object of the present invention to provide an LED illumination lamp which can effectively control a transfer light and a backlight while minimizing an increase in the size of an LED illumination lamp and prevent loss by reusing the blocked light.

An object of the present invention is to provide a light emitting device having a first LED having a plurality of LEDs arranged in the left and right direction and a second LED having a plurality of LEDs arranged in the left and right direction and spaced apart from the first LED at a predetermined distance from the front of the first LED, module; And a control device detachably coupled to the bottom surface of the LED module through a fastening means and configured to reflect light of a backlight and a transfer light in light emitted from the first LED and the second LED, The control device includes: a first reflection plate disposed on the rear side of the first LED and forming an inclined surface inclined rearward toward the lower side; A second reflector disposed at a front side of the first LED and forming an inclined surface inclined forward as it goes downward; A third reflector disposed at a rear side of the second LED and having an inclined surface tilted backward toward the lower side and a lower end integrally formed with a lower end of the second reflector; And a fourth reflector disposed in front of the second LED and forming an inclined surface inclined forward as it goes downward, wherein the inclination angles of the first reflector and the third reflector are 67 to 79 degrees, And the inclination angle of the fourth reflecting plate is 45 DEG.

The first reflector and the third reflector have an inclination angle of 70 ° and the vertical distance from the LED module to the lower end of the second reflector and the third reflector is smaller than the vertical distance from the LED module to the lower end of the first reflector and the fourth reflector. And the light having a beam angle of 60 ° or less is not reflected by the second reflector, the light having a beam angle of 60 to 70 ° is reflected by the second reflector, Light having a beam angle of 50 ° or less in the light emitted from the second LED may not be reflected by the fourth reflector, and light having a beam angle of 50 to 70 ° may be reflected by the fourth reflector.

Also, light of a beam angle of 38 degrees or less in the light emitted from the first LED is not reflected by the first reflector, light of a beam angle of 38 to 70 degrees is reflected by the first reflector, Light having a beam angle of 45 ° or less in the light irradiated from the LED may not be reflected by the third reflector, and light having a beam angle of 45 to 70 ° may be reflected by the third reflector.

The above object is also achieved by a light emitting diode (LED) comprising a plurality of first LEDs arranged in a left-right direction and a plurality of second LEDs arranged in a left-right direction, the second LEDs being spaced apart from the first LEDs in front of the first LEDs LED module; And a control device detachably coupled to the bottom surface of the LED module through a fastening means and configured to reflect light of a backlight and a transfer light in light emitted from the first LED and the second LED, The control device includes: a first reflection plate disposed on the rear side of the first LED and forming an inclined surface inclined rearward toward the lower side; A second reflector disposed at a front side of the first LED and forming an inclined surface inclined forward as it goes downward; A third reflector disposed at a rear side of the second LED and having an inclined surface tilted backward toward the lower side and a lower end integrally formed with a lower end of the second reflector; And a fourth reflector disposed on the front side of the second LED and forming an inclined surface inclined forward toward the lower side, wherein the inclination angles of the first reflector and the third reflector are the same, The angle of inclination of the reflection plate is the same, and the beam angle? ₁ of the light radiated forward without being reflected by the fourth reflector among the lights emitted from the second LED is given by the following equation (1) The beam angle θ ₂ of the light reflected by the fourth reflector after being irradiated is given by the following equation (2), where θ _G is a beam angle of light from the first LED to the first reflector, And an angle of the incident light of the light irradiated to the first reflector is?, The beam angle? ₃ of the light reflected by the first reflector is calculated by the following equation (3) It is accomplished by an illumination lamp.

(1)

(2)

단, θ₃≤38°(3)

However,? ₃ ? 38

In the present invention, the plurality of LED modules are arranged in the front-rear direction, and the first reflection plate, the second reflection plate, the third reflection plate, and the fourth reflection plate are also repeatedly arranged in the front-rear direction, The first reflector may be integrally connected to the fourth reflector located relatively backward.

According to the present invention, a specific part of the transfer light and the backlight irradiated by the first LED and the second LED is reflected by the control device, thereby effectively controlling the light that can particularly cause the glare in the transfer light and the backlight It is possible to provide an LED illumination lamp capable of preventing light pollution and enhancing the ratio of luminous flux in an area requiring illumination by an LED illumination lamp,

According to the present invention, since each reflection plate is provided between the first LED and the second LED and the angle and size of each reflection plate are adjusted, the transfer light and the backlight can be effectively controlled while minimizing the size increase of the LED illumination light, It is possible to provide an LED illumination lamp in which the light blocked by the reflection plate can be reused to prevent the loss and the bottom illuminance can be raised.

1 is a rear perspective view illustrating an LED illumination lamp according to an embodiment of the present invention,
2 is a view for explaining a beam angle range of a transfer light in an LED illumination lamp according to the present invention,
3 is a view for explaining the inclination angles of the second reflection plate and the fourth reflection plate in the LED illumination lamp according to the present invention,
4 is a view for explaining the inclination angles of the first reflector and the third reflector in the LED illumination lamp according to the present invention,
5 is a sectional view showing a part of the configuration of the LED illumination lamp according to the present invention,
6 is a view illustrating a simulation of a light path in an LED illumination lamp according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

2 is a view for explaining a beam angle range of a transfer light in the LED illumination lamp 1 according to the present invention, and FIG. 3 is a cross- 4 is a sectional view of an LED illumination light 1 according to the present invention in which the first reflector 22 and the fourth reflector 24 are inclined. 5 is a cross-sectional view showing a part of the configuration of the LED illumination lamp 1 according to the present invention. FIG. 6 is a sectional view of the LED illumination lamp 1 (1) according to the present invention. FIG. 2 is a view showing a simulation of a light path in FIG.

1 is a view showing the first LED 11 and the second LED 12 seen from the LED illumination light 1 for convenience of explanation (Corresponding to the bottom surface of the LED illumination light 1). When the actual LED illumination light 1 is used, the LED illumination light 1 shown in FIG. 1 is installed in an inverted state.

1, a separate control device 20 is shown separately for convenience of explanation.

The LED illumination light 1 according to the present invention can be used as a street light, a security light, etc., and uses an LED (Light Emitting Diode) as an illumination light source.

As described above, the LED illumination lamp 1 according to the present invention includes the LED module 10, and the LED module 10 includes the first LED 11 and the second LED 12, ). &Lt; / RTI &gt; A plurality of LED modules 10 may be provided, and a plurality of LED modules 10 may be continuously arranged along the forward and backward directions.

In the present invention, the LED module 10 may be a standardized LED standard module adopted in Seoul, municipalities, road construction, etc., and accordingly, the plurality of LED modules 10 may have the same shape and structure.

A plurality of first LEDs 11 are provided in one LED module 10, and each of the first LEDs 11 is arranged in a left-right direction.

A plurality of second LEDs 12 are also provided in one LED module 10, and each of the second LEDs 12 is arranged in the left-right direction. The second LED 12 is formed in the same manner as the first LED 11 and is spaced apart from the first LED 11 by a predetermined distance.

The first LED 11 and the second LED 12 are formed on one PCB 14 on the LED module 10 and the first LED 11 and the second LED 12 on the LED module 10, A plurality of heat dissipation fins 13 are provided on the opposite side of the heat dissipation fin 13.

The controller 20 is coupled to the bottom surface of the LED module 10, and is detachably coupled to the LED module 10 in particular. The control device 20 can be directly coupled to the LED module 10 or can be coupled to a cover (not shown) in which the LED module 10 is fixedly installed.

The control device 20 is coupled with the LED module 10 by the fastening means, and the fastening means can be variously formed in the form of a normal bolt, a hook, a clamp, or the like.

The control device 20 according to the present invention is formed of a reflector so as to reflect the backlight and the transfer light in the light emitted from the first LED 11 and the second LED 12. Specifically, A second reflection plate 22, a third reflection plate 23, and a fourth reflection plate 24.

The control device 20 is provided with a first opening 25 for exposing both the first LED 11 and the second LED 12 on the bottom surface of the LED illumination lamp 1 The first opening 25 and the second opening 26 are formed in the shape of a hole penetrating in the vertical direction, and the second opening 26 The width in the front-rear direction is made constant.

The LED module 10 according to the present invention may include a plurality of LED modules 10 arranged in the forward and backward directions as described above and may include a first reflector 21 constituting the control device 20, The second reflector 22, the third reflector 23, and the fourth reflector 24 may be repeatedly arranged in the front-back direction. The first reflector 21 relatively positioned at the front side is preferably integrally connected to the fourth reflector 24 relatively positioned at the rear.

It goes without saying that the first opening 25 and the second opening 26 are also repeatedly provided on the control device 20. [

The first reflector 21, the second reflector 22, the third reflector 23 and the fourth reflector 24 are all made of reflectors and can be made of AL1070 series material.

The first reflector 21 is in the form of a flat plate and is disposed on the rear side of the first LED 11 and forms an inclined surface inclined rearward toward the bottom. The first reflector 21 preferably has a flat surface.

The second reflector 22 is formed in a flat plate shape and is disposed in front of the first LED 11 and forms an inclined surface inclined forward as it goes downward. It is preferable that the second reflector 22 is flat.

The first reflector 21 and the second reflector 22 are arranged on both sides with respect to the first LED 11 and form a shape extending toward the lower side.

The third reflector 23 is in the form of a flat plate and is disposed on the rear side of the second LED 12 and forms an inclined surface inclined backward as it goes downward. It is preferable that the third reflector 23 is flat.

The lower end of the third reflector 23 is preferably integrated with the lower end of the second reflector 22 so that the second reflector 22 and the third reflector 23 are pointed downward.

The fourth reflector 24 is formed in a flat plate shape and is disposed in front of the second LED 12 and forms an inclined surface inclined forward as it goes downward. It is preferable that the third reflector 23 is flat.

The third reflector 23 and the fourth reflector 24 are disposed on both sides with respect to the second LED 12 and form a shape extending toward the lower side.

The inclination angles of the first reflector 21 and the third reflector 23 are equal to each other and the inclination angles of the second reflector 22 and the fourth reflector 24 are equal to each other in the LED illumination light 1 according to the present invention .

The inclination angles of the first reflector 21, the second reflector 22, the third reflector 23 and the fourth reflector 24 of the LED module 10 according to the present invention correspond to the first Refers to an angle with respect to the surface on which the LED 11 and the second LED 12 are formed (the plane parallel to the plane formed by the PCB 14 of the LED module 10).

The vertical distance from the LED module 10 to the lower end of the second reflector 22 and the lower end of the third reflector 23 is equal to the vertical distance from the LED module 10 to the lower end of the first reflector 21 and the fourth reflector 24, The vertical distance from the LED module 10 to the lower ends of the second reflector 22 and the third reflector 23 is different from the distance between the first reflector 21 and the fourth reflector 23 in the LED module 10, Is shorter than the vertical distance to the lower end of the upper surface (24).

In the present invention, light having a beam angle of 60 ° or less among the lights emitted from the first LED 11 is not reflected by the second reflector 22, and light having a beam angle of 60 ° to 70 ° is reflected by the second reflector 22 The light having a beam angle of 50 ° or less among the lights emitted from the second LED 12 is not reflected by the fourth reflection plate 24 and the light having a beam angle of 50 to 70 ° is reflected by the fourth reflection plate 24, as shown in Fig.

Here, the 'beam angle' according to the present invention is defined as the angle between the plane on which the first LED 11 and the second LED 12 of the LED module 10 are formed (the plane formed by the PCB 14 of the LED module 10) (A plane parallel to the direction in which the first LEDs 11 are arranged) that is orthogonal to the downward direction from the first LED 11 on one side.

The LED illumination light 1 according to the present invention reduces the light (light flux ratio) that deviates from a specific area by reflecting part of the transmitted light and the backlight radiated from the first LED 11 and the second LED 12 In order to maximize the function of the illumination by allowing the light to be gently illuminated in the region other than the specific region and in the region forming the boundary between the specific region and the other region And the features of the present invention will be described in more detail below.

According to the KS standard of the security luminaires, the light emitted at the installation height of 5m should be irradiated within 6m ahead, and it is highly likely to cause light pollution when irradiated to other areas.

2, when the LED illumination light 1 is coupled to the 5 m height above the column 2 formed vertically on the ground, the light illuminated by the LED illumination light 1 travels generally within 6 m ahead It is preferable to be irradiated.

In consideration of this point, in the present invention, the beam angle &amp;thetas; ₁ of the light radiated forward without being reflected by the fourth reflector 24 of the light emitted from the second LED 12 is given by the following equation (1) The beam angle &amp;thetas; ₂ of the light reflected by the fourth reflector 24 after being irradiated by the second LED 12 is given by the following equation (2).

That is, in the present invention, a part of the transfer light irradiated by the second LED 12 is not reflected by the fourth reflection plate 24, and the other part is reflected by the fourth reflection plate 24 so that the beam angle is changed The distance between the second LED 12 and the fourth reflection plate 24, the inclination angle of the fourth reflection plate 24, the height of the fourth reflection plate 24, and the like are determined.

According to Equation (1),? ₁ is about 50.2 degrees, and? ₂ is about 38.7 degrees according to Equation (2).

3 (a), when light in a range of 55 to 70 degrees of beam angle is incident on an arbitrary reflection surface (mirror surface, 100% regular reflection) parallel to the vertical line, incident light A, (B), and a light (C) that is perpendicular to B are shown, respectively.

With reference to Figure 3 (a), [θ = 90 ° -θ G] , and the incidence angle θ is, the same as, [θ, the reflection angle θ '= 90 ° - (( 180 ° -θ G) -2θ)] , It can be seen that the angle? '' Is 20 to 35 ° and is 38 ° or less.

That is, all the angle θ '' shown in FIG. 3 (a) corresponds to 38 ° or less and has a value smaller than θ _{2 according} to Equation (2).

3A and 3B are shown in Fig. 3 (b). If half of the angle formed by A and C is defined as a normal line and an inclination perpendicular to the normal line is derived, (Inclination angle = 90 ° - (θ + θ '' + 90 °) / 2 + θ ''].

In consideration of this point, it is preferable that the angle of inclination of the second reflector 22 and the fourth reflector 24 in the LED illumination light 1 according to the present invention is 45 °, When the light is reflected by the second reflector 22 and the reflected light from the second LED 12 is reflected by the fourth reflector 24, the beam angle of each reflected light is 38 ° or less, When the illumination lamp 1 is installed at a height of 5 m, the reflected light is irradiated to an area within 4 m ahead.

As described above, the beam angle of the light radiated forward without being reflected by the fourth reflector 24 among the lights emitted from the second LED 12 is about 50.2 °, and the angle of the second LED 12, The beam angle of the light reflected by the fourth reflector 24 is 38.7 degrees. Accordingly, the transmitted light irradiated from the second LED 12 is reflected by all of the light It is very likely to be irradiated to an area where pollution is unlikely to occur and the light reflected by the fourth reflecting plate 24 can increase the light flux ratio in an area within 20 ° of the direct illumination light 1 in a downward direction as the beam angle decreases (See Fig. 6)

In addition, a part of the transfer light irradiated from the first LED 11 (beam angle 60 to 70 degrees) is reflected in the second reflector 22 and is reflected in a region where there is no possibility of causing light pollution (Beam angle of about 50.2 to 60 degrees) of the transfer light that is not reflected by the second reflection plate 22 is out of such a region and irradiates a further front region than the transfer light irradiated by the second LED 12 .

As a result, most of the light emitted from the first LED 11 and the second LED 12 is irradiated to a region where light pollution is unlikely to occur according to the KS standard of security luminaire, It is possible to irradiate the area ahead of the transferred light in the second LED 12 in which the transfer light in the first LED 11 located in the front is relatively positioned, (1) capable of effectively controlling light, preventing light pollution, enhancing the ratio of luminous flux in an area requiring illumination by the LED illumination lamp (1) .

Next, when the LED illumination light 1 according to the present invention is installed as a security light fixture, the light due to the backlight must be controlled to 100%, while the light of the strong intensity region (45 to 60 degrees) The inclination angles of the first reflector 21 and the third reflector 23 should be determined so as to be incident on the irradiation area.

4, when light having an arbitrary beam angle? _G is incident on an arbitrary reflection surface (mirror surface, 100% regular reflection) inclined to a vertical line, incident light A, light B reflected from an arbitrary reflection surface, Respectively.

In FIG. 4, θ is an angle at which A is incident on an arbitrary reflection plane, θ 'is an angle at which B is reflected by an arbitrary reflection plane, and θ''is an angle formed by a normal line B perpendicular to the horizontal plane, ? '= 180? - (? _G + 2?)], and the inclination angle of the arbitrary reflection surface of FIG. 4 satisfies [inclination angle =?' +? ''].

If the angle θ _G is 45 ° to 60 ° and the angle θ 'has a value of 0 to 38 °, the inclination angle of the arbitrary reflection surface of FIG. 4 has a range of 67.5 to 79 °.

Accordingly, when the inclination angles of the first reflector 21 and the third reflector 23 are set to fall within a range of 67.5 to 79 °, the first LED 11 and the second LED 12 emit light The light beam having the middle beam angle of 45 to 60 degrees is reflected by the first reflector plate 21 and the third reflector plate 23 and the beam angle of the corresponding reflected light beam is all within 38 degrees.

In consideration of this point, in the present invention, a beam angle of the light from the first LED 11 to the first reflector 21 is θ _G , an incident angle of light emitted from the first LED 11 to the first reflector 21 The beam angle &amp;thetas; ₃ of the light reflected by the first reflector 21 is given by the following equation (3).

However,? ₃ ? 38

In the present invention, light (backlight) having a beam angle of 38 degrees or less in the light emitted from the first LED 11 is not reflected by the first reflection plate 21, (Backlight) having a beam angle of 45 degrees or less in the light reflected by the first reflector 21 and the second LED 12 is not reflected by the third reflector 23, (Backlight) of the first LED 11 and the second LED 12 is preferably reflected by the third reflector 23 so that most of the light (backlight) According to the KS standard, it is irradiated to areas where there is no possibility of light pollution. In particular, it is possible to block all the lights in strong intensity areas (45 to 60 °) in the backlight.

FIG. 6 is a view showing a simulation of a light path in the LED illumination light 1 according to the present invention. FIG. 6 (a) shows a case where the control device 20 according to the present invention is not included. Is a case where the control device 20 according to the present invention is included.

When the control device 20 according to the present invention is included in the first and second LEDs 11 and 12, the second and third reflectors 22 and 24 of the transfer light irradiated from the first LED 11 and the second LED 12, A substantial part of the reflected light is reflected by a reflection angle of 0 to 20 degrees in a direction directly below the LED illumination light 1 and is reflected by the first reflector 21 and the second reflection plate 21, It can be seen that a substantial part of the light reflected by the third reflector 23 is reflected by the forward 30 to 50 ° reflection angle of the LED illumination light 1 and compared with the case where the control device 20 according to the present invention is not included , The luminous flux ratio of the glare-inducing region (60 to 90 °) was lowered by 23.1% and the luminous flux ratio of the backlight region (70 to 90 °) was lowered by 1.3% or less (-64.9%), It can be confirmed that the illumination can be controlled to 25lx or less (four kinds of lighting environment management area).

As described above, according to the LED illumination light 1 according to the present invention, a specific part of the transmitted light and the backlight radiated from the first LED 11 and the second LED 12 is reflected by the control device 20 It is possible to effectively control the light that can particularly cause glare among the transfer light and the backlight and to prevent the light pollution and to increase the light flux ratio in the area requiring illumination by the LED illumination light 1, The area can also be provided with the LED illumination light 1 which can be lightly illuminated.

According to the LED illumination lamp 1 according to the present invention, since each reflector is provided between the first LED 11 and the second LED 12 and the angle and size of each reflector are adjusted, It is possible to provide an LED illumination lamp 1 that can efficiently control the transfer light and the backlight while minimizing the amount of light reflected by the reflection plate, prevent loss by reusing the light blocked by each reflection plate, and increase the bottom surface illumination.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: LED light
10: LED module 11: first LED
12: The second LED
20: control device 21: first reflector
22: second reflector 23: third reflector
24: Fourth reflector

Claims (5)

An LED module including a plurality of first LEDs arranged in the left and right direction and a plurality of second LEDs arranged in the left and right direction and spaced apart from the first LEDs in front of the first LEDs; And
And a control device detachably coupled to a bottom surface of the LED module through a fastening means and configured to reflect light of a backlight and a transfer light in light emitted from the first LED and the second LED,
The control device includes:
A first reflector disposed at a rear side of the first LED and forming an inclined surface inclined rearward toward the lower side;
A second reflector disposed at a front side of the first LED and forming an inclined surface inclined forward as it goes downward;
A third reflector disposed at a rear side of the second LED and having an inclined surface tilted backward toward the lower side and a lower end integrally formed with a lower end of the second reflector; And
And a fourth reflector disposed on the front side of the second LED and forming an inclined surface inclined forward toward the lower side,
The inclination angle of the first reflector plate and the third reflector plate is 70 °, the inclination angle of the second reflector plate and the fourth reflector plate is 45 °,
The vertical distance from the LED module to the lower ends of the second reflector and the third reflector is shorter than the vertical distance from the LED module to the lower end of the first reflector and the fourth reflector,
The light having a beam angle of 60 ° or less among the lights emitted from the first LED is not reflected by the second reflector, the light having a beam angle of 60 ° to 70 ° is reflected by the second reflector,
Wherein light emitted from the second LED is not reflected by the fourth reflector but is reflected by the fourth reflector at a beam angle of 50 to 70 degrees,
Light having a beam angle of 38 ° or less among the lights irradiated from the first LED is not reflected by the first reflector and light having a beam angle of 38 to 70 ° is reflected by the first reflector,
Wherein the light emitted from the second LED is not reflected by the third reflector and the light with a beam angle of 45 to 70 is reflected by the third reflector. Lighting. delete delete An LED module including a plurality of first LEDs arranged in the left and right direction and a plurality of second LEDs arranged in the left and right direction and spaced apart from the first LEDs in front of the first LEDs; And
And a control device detachably coupled to a bottom surface of the LED module through a fastening means and configured to reflect light of a backlight and a transfer light in light emitted from the first LED and the second LED,
The control device includes:
A first reflector disposed at a rear side of the first LED and forming an inclined surface inclined rearward toward the lower side;
A second reflector disposed at a front side of the first LED and forming an inclined surface inclined forward as it goes downward;
A third reflector disposed at a rear side of the second LED and having an inclined surface tilted backward toward the lower side and a lower end integrally formed with a lower end of the second reflector; And
And a fourth reflector disposed on the front side of the second LED and forming an inclined surface inclined forward toward the lower side,
Wherein the inclination angles of the first reflector plate and the third reflector plate are the same and the inclination angles of the second reflector plate and the fourth reflector plate are the same,
The light having a beam angle of 60 ° or less among the lights emitted from the first LED is not reflected by the second reflector, the light having a beam angle of 60 ° to 70 ° is reflected by the second reflector,
Light having a beam angle of 45 degrees or less among the lights emitted from the second LED is not reflected by the third reflector, light having a beam angle of 45 to 70 degrees is reflected by the third reflector,
A beam angle? ₁ of light radiated forward without being reflected by the fourth reflector among the lights emitted from the second LED is given by the following equation 1, The beam angle &amp;thetas; ₂ of the light reflected by the light source is given by the following equation (2)
When the angle of a beam of light from the first LED to the first reflector is θ _G and the angle of incident light of the light from the first LED to the first reflector is θ, Wherein the beam angle &amp;thetas; ₃ of the LED is given by the following equation (3).
(1)

(2)

(3)

However,? ₃ ? 38 The method according to claim 1 or 4,
Wherein the plurality of LED modules are arranged in the front-rear direction,
The first reflection plate, the second reflection plate, the third reflection plate, and the fourth reflection plate are also repeatedly arranged in the front-
Wherein the first reflector located relatively in front is integrally connected to the fourth reflector located relatively rearward.

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