KR20160069350A - Lighting device module - Google Patents

Abstract

Provided are a lens cover which is easily assembled and processed and blocks rear light and a light emitting module including the same. According to an embodiment of the present invention, the lens cover comprises: at least one lens formed to correspond to a point light source, and guiding light generated in the light source; and an optical plate on which the lens is arranged. The lens includes: a transmission unit in which the light generated in the point light source is emitted to an irradiation area; a rear light blocking unit limiting the emission of the light generated in the point light source to a rear side of the irradiation area. The rear light blocking unit further includes an additive for assigning a reflective property to the same material as the transmission unit.

Description

[0001] LIGHTING DEVICE MODULE [0002]

Embodiments relate to a light emitting module and a lighting apparatus including the same.

Generally, indoor or outdoor lighting is used as a lamp or a fluorescent lamp. In the case of such a bulb or fluorescent lamp, there is a problem that its lifetime is short and it is frequently exchanged. In addition, a conventional fluorescent lamp may deteriorate over time, and the illuminance may gradually decrease.

In order to solve such a problem, a light emitting diode (LED) capable of realizing excellent controllability, fast response speed, high electric light conversion efficiency, long swimming, low power consumption, Various types of lighting modules are being developed.

Light emitting diodes (LEDs) are a type of semiconductor devices that convert electrical energy into light. The light emitting diode has advantages of low power consumption, semi-permanent lifetime, fast response speed, safety, and environmental friendliness compared with conventional light sources such as fluorescent lamps and incandescent lamps. Accordingly, much research has been carried out to replace an existing light source with a light emitting diode, and a light emitting diode has been increasingly used as a light source for lighting devices such as various liquid crystal displays, electric sign boards, and street lamps used outside the room.

FIG. 14 is a reference view showing an optical distribution according to a conventional illumination device. FIG.

Referring to FIG. 14, in the case of the conventional street light 1, the light is arranged at a constant pitch along the longitudinal direction of the road.

At this time, the light traveling to the area excluding the road becomes light pollution. Particularly, there is a problem that light traveling toward the rear (S) in the width direction of the road causes serious light pollution.

Embodiments provide a lens cover that is easy to assemble and process, blocks backlight, and a light emitting module including the lens cover.

The lens cover according to an embodiment includes at least one lens which is formed corresponding to a point light source and guides light generated in the light source and an optical plate on which the lens is disposed, And a backlight shut-off unit for restricting emission of light generated by the point light source to the rear of the irradiated area, wherein the backlight shut-off unit includes an additive for imparting a reflection characteristic to the same material as the transmissive unit And further comprising:

According to the embodiment, the backlight interruption portion is formed in the lens to block the light traveling in the backward direction of the irradiation region, thereby preventing light pollution due to backlight.

Further, the embodiment is advantageous in that it is easily formed by injection molding in the form of a cover including a plurality of lenses.

In addition, since the afterimage shielding part is manufactured by adding an additive to the same material as the lens, there is an advantage that it is easy to manufacture.

According to the light emitting module of the embodiment, there is an advantage that the heat generated in the light emitting module can be effectively emitted.

 Further, the flow velocity of the air passing through the air hole and the air guide portion is faster than the convection caused by the general heat, so that there is an advantage that the heat radiation effect is increased.

In addition, there is an advantage that the lens cover is fitted around the air hole to prevent moisture and foreign matter from flowing into the air hole.

1 is a perspective view of a light emitting module according to an embodiment of the present invention,
FIG. 2 is an exploded perspective view of the light emitting module of FIG. 1,
FIG. 3 is a front view of the light emitting module of FIG. 1;
FIG. 4 is a side view of the light emitting module of FIG. 1;
FIG. 5 is a rear view of the light emitting module of FIG. 1;
FIG. 6A is a plan view showing a state where a light source unit is coupled with one surface of a body according to an embodiment of the present invention; FIG.
FIG. 6B is a cross-sectional view of the light emitting module according to FIG. 1 taken along line AA,
7A is a cross-sectional view of a lens cover according to an embodiment of the present invention,
FIG. 7B is a perspective view of a lens cover according to an embodiment of the present invention,
8A is a plan view of a lens according to an embodiment of the present invention,
FIG. 8B is a cross-sectional view taken along the line I-I 'in FIG. 8A,
FIG. 8C is a cross-sectional view taken along the line II-II 'in FIG. 8A,
FIG. 9A is a cross-sectional view of a lens according to a second embodiment of the present invention taken along a first direction,
FIG. 9B is a cross-sectional view of the lens according to the second embodiment of the present invention taken along the second direction,
10A is a cross-sectional view of a lens according to a third embodiment of the present invention taken along a first direction,
FIG. 10B is a cross-sectional view of the lens according to the third embodiment of the present invention taken along the second direction,
11 is a view showing an air flow velocity distribution of a light emitting module in an embodiment,
12 is a sectional view of a light emitting module according to another embodiment of the present invention,
10 is a perspective view of a module array including a light emitting module according to an embodiment of the present invention,
Figure 11 is a top view of the module array shown in Figure 10,
13 is a perspective view of a lighting device including a light emitting module of the present invention,
FIG. 14 is a reference view showing an optical distribution according to a conventional illumination device. FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a light emitting module according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the light emitting module of FIG. 1, FIG. 3 is a front view of the light emitting module of FIG. And Fig. 5 is a rear view of the light emitting module of Fig.

1 to 5, a light emitting module 100 according to an exemplary embodiment includes a body 120, a light source unit 110 disposed on one side of the body 120, a body 120 facing the one side of the body 120, A plurality of radiating fins 130 positioned on the other surface of the body 120 and an air hole 122 formed through the body 120 in a direction opposite to the surface of the body 120 and flowing air, And a lens cover 140 covering the unit 110 and having a cover hole 143 corresponding to the air hole 122.

The light source unit 110 may include any means for generating light.

For example, the light source unit 110 includes a substrate 112 and a point light source 111 disposed on the substrate 112 and electrically connected to the substrate 112.

The substrate 112 is disposed on one side of the body 120. Here, one surface of the body 120 means the upper surface of the body 120 in FIG. The substrate 112 has a rectangular plate shape corresponding to one surface of the body 120, but is not limited thereto. For example, a polygonal shape, an elliptical shape, or the like.

The substrate 112 may be a circuit pattern printed on an insulator and may be a printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or the like. have.

Here, the light source unit 110 may be a COB (Chips On Board) capable of directly bonding an unpackaged LED chip on a printed circuit board. The COB contains ceramic materials to ensure heat resistance and insulation.

The upper surface of the substrate 112 may be coated with a material capable of efficiently reflecting light. For example, the upper surface of the substrate 112 may be coated with a white or silver material.

One or a plurality of point light sources 111 may be disposed. Further, when a plurality of point light sources 111 are arranged, each of the point light sources 111 may output different colors or may have different color temperatures. The point light source 111 includes a semiconductor element or a light emitting diode.

The light source unit 110 may be positioned in the light source seating groove 121 formed on one side of the body 120 of the light source unit 110 and supported by the body 120.

The light source receiving groove 121 is formed by recessing one side of the body 120 and the substrate 112 has a shape corresponding to the shape of the light source receiving groove 121 and can be coupled to the light source receiving groove 121.

Of course, as will be described later, the light source seating groove 121 may form a space in which the outer partition wall 145 (146) of the lens cover 140 is inserted between the light source seating groove 121 and the edge of the substrate 112.

In embodiments, a fastener (f), such as a bolt, is used to couple the substrate (112) to the body (120). The body 120 and the substrate 112 are each provided with fastening grooves and holes 114-1 and 114 for fastening with the fastener f.

Further, an alignment hole 115 protruding from the substrate 112 and into which the lens cover 140 is inserted is formed.

Specifically, a substrate hole 113 communicating with the air hole 122 may be formed in the substrate 112.

The substrate holes 113 are positioned so as to overlap with the air holes 122 in the vertical direction (Y-axis direction), and communicate with each other to provide space for air to flow.

Here, the vertical meaning does not mean a perfect vertical of the mathematical meaning but it means a vertical including an error in an engineering sense.

Specifically, the substrate hole 113 has a shape and a size corresponding to the air hole 122. The substrate holes 113 are elongated along the longitudinal direction of the substrate 112 at the center in the width direction of the substrate 112.

At this time, a plurality of point light sources 111 positioned on the substrate 112 may be arranged to surround the substrate holes 113.

Specifically, the substrate hole 113 may be formed through the substrate 112 in the Y-axis direction, and the point light sources 111 may be disposed to surround the substrate hole 113 in the X-Z axis plane.

A heat dissipation pad 150 may be further provided between the substrate 112 and the light source seating groove 121 to improve heat transfer.

The heat dissipation pad 150 may include a material having a shape corresponding to the light source seating groove 121 and having excellent heat transmission and adhesiveness. For example, the heat-radiating pad 150 may be made of a silicon material.

Specifically, the heat radiating pad 150 has a film shape and a pad hole 153 communicating with the air hole 122 may be formed.

The body 120 provides a place where the light source unit 110 is seated and transfers the heat generated from the light source unit 110 to the heat radiation fins 130. In order to increase the heat transfer efficiency, the body 120 may be formed of a metal material or a resin material having a high heat dissipation efficiency, but the present invention is not limited thereto.

For example, the material of the body 120 may include at least one of aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), and tin (Sn). The body 120 may be formed of a resin material such as polyphthalamide (PPA), silicon (Si), aluminum (Al), aluminum nitride (AlN), liquid crystal polymer (PSG) (PA9T), syndiotactic polystyrene (SPS), a metal material, sapphire (Al2O3), beryllium oxide (BeO), and ceramics.

The body 120 may be formed by injection molding, etching, or the like, but is not limited thereto.

The light source unit 110 is disposed on one side of the body 120 and the heat generating fin 130 is coupled to the other side of the body 120.

Specifically, the body 120 has a light source seating groove 121 on which a light source unit 110 is mounted, and a plurality of heat dissipation fins 130 may be disposed on a surface opposite to the one surface.

The body 120 may have a plate shape, and a plane (X-Z axis plane) shape may be a square shape.

At the corner of the body 120, a screw hole 126 through which a screw is passed may be formed when the body 120 is coupled to a lighting device or the like.

One side of the body 120 to which the light source unit 110 is coupled and the lens cover 140 is coupled will be described later.

In particular, referring to FIG. 3, the radiating fin 130 may have a shape for maximizing an area in contact with air.

Specifically, the radiating fin 130 may have a plurality of plate shapes formed to extend downward (in a direction opposite to the Y axis) from the other surface (for example, the lower surface) of the body 120.

The width of the heat dissipation fin 130 is formed to be equal to the width of the body 120 so that the heat of the body 120 can be effectively transmitted to the heat dissipation fin 130. [ .

And may be integrally formed with the body 120 of the radiating fin 130, or may be manufactured as a separate component.

The heat dissipation fin 130 may include at least one of a material having an excellent heat transfer property, for example, aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), and tin (Sn).

3 and 4, the radiating fin 130 is arranged long in the width direction (X-axis direction) of the body 120, has a constant pitch in the length direction (Z-axis direction) Can be installed.

 The center portion 131 of the radiating fin 130 may be recessed in the direction of the body 120 than the both end portions 133 of the radiating fin 130. [

The point light source 111 is vertically overlapped with both end portions 133 of the heat dissipation fin 130 so that the both end portions 133 of the heat dissipation fin 130 are formed higher than the center portion 131 of the heat dissipation fin 130, And the central portion 131 of the radiating fin 130 is formed so as to save manufacturing cost.

1 and 2, the air hole 122 is formed through the body 120 in the direction of the radiating fin 130 (Y-axis direction) from one side of the body 120, .

The air hole 122 may be formed long in the longitudinal direction of the body 120 at a central portion of the body 120.

The air hole 122 is vertically overlapped with the substrate hole 113 formed in the substrate 112, the cover hole 143 formed in the lens cover 140, and the pad hole 153 formed in the heat radiation pad 150 And can be formed to communicate with each other.

The air hole 122 circulates the air by the temperature difference between the inside and the outside of the air hole 122 and this circulated air can accelerate the cooling of the radiating fin 130 and the body 120.

Specifically, the air holes 122 are vertically overlapped with the central portion 131 of the heat dissipation fins 130, and the point light sources 111 may be positioned vertically overlapping the both end portions 133 of the heat dissipation fins 130 .

More specifically, as shown in FIG. 2, the air hole 122 is formed in the center of the body 120 And the point light sources 111 may be spaced apart from each other along the longitudinal direction of the air holes 122. In addition,

At this time, more than half of the point light sources 111 can be formed adjacent to the side formed in the longitudinal direction of the air hole 122. That is, a plurality of point light sources 111 are arranged in two rows in the first direction, air holes 122 are formed in the first direction between the rows of the point light sources 111, More than half of the point light sources 111 can be positioned adjacent to each other. Thus, effective heat transfer becomes possible. Of course, the substrate hole 113 may be formed corresponding to the shape of the air hole 122.

In addition, the area of the air hole 122 may be 10% to 20% of the area of the body 120 when viewed from above.

And an air guide 160 extending from the rim of the air hole 122 to the other side of the body 120 in the direction opposite to the Y axis and communicating with the air hole 122 to guide the air.

5, the air guide unit 160 may have a cylindrical shape having a space therein and may have a rim overlapped with the rim of the air hole 122. Referring to FIG. That is, the air guide portion 160 may have a shape of a chimney surrounding the air hole 122.

The inner surface of the air guide portion 160 is located on the same plane as the inner surface of the air hole 122 so that the air flow between the air guide portion 160 and the air hole 122 is not disturbed can do.

The air guide 160 may be made of a material having a high heat transfer efficiency. For example, the material of the air guide 160 may include at least one of aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), and tin (Sn). The air guide 160 may be formed of a resin material such as polyphthalamide (PPA), silicon (Si), aluminum (Al), aluminum nitride (AlN), liquid crystal polymer Amide 9T (PA9T), syndiotactic polystyrene (SPS), metal materials, sapphire (Al2O3), beryllium oxide (BeO), ceramics.

The air guide unit 160 is thermally connected to at least a part of the plurality of heat dissipation fins 130 so that the heat transferred from the point light source 111 to the heat dissipation fins 130 can be transmitted to the air guide unit 160.

At least some of the plurality of radiating fins 130 may be connected to the outer surface of the air guide 160.

Since the heat generating fin 130 is not disposed in the air guiding portion 160, the air flowing into the air guiding portion 160 is not interfered by the heat generating fin 130.

In addition, a connector 190 for supplying power to the point light source 111 and a connector hole 124 passing through the body 120 may be formed.

The lens cover 140 covers the light source unit 110 to guide the light generated by the light source unit 110 and prevent moisture penetrating from the outside to the light source unit 110.

The lens cover 140 may be formed by applying a light diffusion coating (not shown) on the surface or by attaching a light diffusion film (not shown) on the surface for increasing or decreasing the illuminated area of the light and the light, Or a semi-transparent synthetic resin may be used.

Here, the light diffusion coating material may be one containing an organic particle bead such as PMMA or silicon.

The lens cover 140 of the embodiment has a structure that is easy to assemble to the body 120 and seals the light source unit 110 with the outside.

Hereinafter, the structure of one surface of the body 120 into which the lens cover 140 and the lens cover 140 are inserted will be described in detail with reference to the drawings.

FIG. 6A is a plan view showing a state in which a light source unit is combined with one surface of a body according to an embodiment of the present invention, FIG. 6B is a sectional view taken along line AA of the light emitting module according to FIG. FIG. 7B is a perspective view of a lens cover according to an embodiment of the present invention as viewed from the rear; FIG.

Before describing the detailed structure of the lens cover 140, the structure of the body 120 to which the lens cover 140 is inserted and coupled will be described in detail.

6A and 6B, a lens cover 140, which covers at least the light source unit 110 and hermetically seals the light source unit 110, is inserted into and coupled to one side of the body 120.

For example, on one side of the body 120, an inner engaging groove 210 formed around the air hole 122 is formed.

The inner engaging groove 210 provides a place where the inner partition wall 144 of the lens cover 140 described later is inserted and engaged.

The inner engaging groove 210 is formed on one surface of the body 120 along the circumferential direction of the air hole 122 so as to surround the air hole 122 as viewed from above.

For example, the inner engaging groove 210 may be formed such that one surface (upper surface) of the body 120 is downwardly recessed. Of course, the shape and size of the inner engaging groove 210 correspond to the inner partition wall 144.

6B, a light source receiving groove 121 is formed on one side of the body 120 so as to be recessed downward and at least a substrate 112 of the light source unit 110 is seated, The groove 210 may be defined by protrusions 221 and 222 protruding upward from the bottom of the light source receiving groove 121.

Specifically, the body 120 further includes a first inner protrusion 221 and a second inner protrusion 222, and the inner engaging groove 210 includes a first inner protrusion 221, a second inner protrusion 222, 222). ≪ / RTI >

The first inner protrusion 221 protrudes upward from one surface of the body 120. That is, the first inner protrusion 221 is disposed so as to surround the air hole 122 in the vicinity of the air hole 122 when viewed from above.

In order to increase the fluidity of the air, the inner side surface of the first inner protrusion 221 is preferably located on the same plane as the inner surface of the air hole 122.

The first inner protrusion 221 is formed adjacent to the air hole 122 than the second inner protrusion 222.

The second inner protrusion 222 defines the inner engaging groove 210 together with the first inner protrusion 221. That is, the second inner protrusions 222 are spaced apart from the first inner protrusions 221 so as to surround the first inner protrusions 221.

At this time, the second inner protrusion 222 fits into the substrate hole 113 of the light source unit 110. Specifically, the substrate hole 113 is shaped to correspond to the outer shape of the second inner protrusion 222, and the second inner protrusion 222 is fitted into the substrate hole 113.

Preferably, the thickness of the second inner protrusion 222 may correspond to the thickness of the substrate 112.

On the whole, the structure of one surface of the body 120 will be described in detail as follows.

An air hole 122 is formed at the center of one side of the body 120 and a first inner protrusion 221 and a second inner protrusion 222 which surround the air hole 122 and define the inner coupling groove 210, Is formed. A light source receiving groove 121 in which the substrate 112 of the light source unit 110 is seated is defined between one edge of the body 120 and one edge of the body 120 in one side of the body 120.

Here, the light source seating groove 121 has a size corresponding to the size and shape of the substrate 112 so that at least the substrate 112 is located inside.

Specifically, the light source receiving groove 121 may be formed by depressing an area of the light source receiving groove 121 except the edges of one side of the inner combining groove 210 and the body 120, as viewed from above.

Of course, the light source seating groove 121 may have a size larger than that of the substrate 112 to provide a space into which the later described outer barrier ribs 145 and 146 are inserted.

A cover seating groove 129 is formed in the periphery of the light source seating groove 121 in which the rim of the lens cover 140 is seated along the periphery of the light source seating groove 121.

Of course, the cover seating groove 129 may be formed by recessing one surface of the body 120 corresponding to the lens cover 140. Specifically, the cover receiving groove 129 is formed at a size such that at least the side surface (reference to FIG. 6B) of the lens cover 140 and the bottom surface are accommodated.

The bottom of the light source receiving groove 121 is located below the bottom of the cover receiving groove 129 and the light source receiving groove 121 is located inside the inside of the cover receiving groove 129 in consideration of the thickness of the substrate 112. [ Respectively.

The body 120 further includes an outer protrusion 225 inserted into a cover groove 148 of the light source unit 110.

Here, the outer protrusion 225 has a space 227 into which the outer barrier rib 145 (146) (specifically, the first outer barrier rib 145) is inserted between the outer protrusion 225 and the outer surface (rim) of the substrate 112 define.

Specifically, the outer protrusions 225 are spaced apart from the substrate 112 by surrounding the substrate 112 along the periphery of the substrate 112 when viewed from above.

At this time, the light source receiving groove 121 may be defined as a space between the outer protrusion 225 and the second inner protrusion 222.

The body 120 may further include an outer coupling groove 228 into which a second outer barrier rib 146 described later is inserted.

The outer engaging groove 228 defines a space into which the second outer partition wall 146 is inserted. The outer engaging groove 228 is formed to surround the substrate 112.

Specifically, the outer engaging groove 228 is defined between the outer projection 225 and the cover receiving groove 129.

Particularly, considering the thickness of the lens cover 140 and the substrate 112, a cover seating groove 129 corresponding to the lens cover 140 is formed on one surface of the body 120, and the cover seating groove 129 The light source receiving groove 121 is formed at a lower level than the cover receiving groove 129 and the inner receiving groove 210 and the outer combining groove 228 are formed at the same height as the light source receiving groove 121, A floor is formed.

At this time, the first inner protrusions 221, the second inner protrusions 222, and the outer protrusions 225 protrude upward from one side of the body 120 (more specifically, the bottom of the light source seating groove 121) The groove 210 and the outer engaging groove 228 are defined.

It is preferable that the upper ends of the first inner protrusions 221, the second inner protrusions 222 and the outer protrusions 225 are positioned on the same plane as the bottom of the cover seating groove 129.

In addition, an insertion groove 121b into which a fitting blade 147 of a lens cover 140 described later is inserted may be formed at an edge of the body 120.

Of course, the lens cover 140 may be bonded with an adhesive or the like without inserting the insertion groove 121b.

Specifically, the insertion groove 121b may be formed by recessing the protruding ends 121a protruding from both ends of one surface of the body 120 to both sides.

More specifically, the insertion groove 121b is formed such that the outer side surface of the cover receiving groove 129 is depressed outwards.

Hereinafter, the lens cover 140 to be inserted and coupled to one surface of the body 120 will be described.

6B to 7B, for example, the lens cover 140 covers at least the light source unit 110 in the form of a plate.

For example, the light source unit 110 may include a lens 141 corresponding to the point light source 111 for changing the directivity angle of the light generated by the point light source 111 of the light source unit 110.

As another example, the lens cover 140 includes an optical plate 142 and a lens 141 disposed on the optical plate 142.

The optical plate 142 covers at least the top surface of the substrate 112 and the point light source 111 and has a size larger than that of the substrate 112.

The optical plate 142 is provided with a lens 141 at a position corresponding to the point light source 111.

The optical plate 142 may be provided with a cover hole 143 corresponding to the air hole 122.

Specifically, the cover hole 143 may be formed through the center of the optical plate 142 in a vertical direction (Y-axis direction).

The lens cover 140 protrudes downward from the lower surface of the lens cover 140 and includes a partition wall that is inserted in one side of the body 120 to seal the light source unit 100. The partition wall prevents external moisture or dust from penetrating into the light source unit 100.

For example, the partition includes the inner partition wall 144 or the outer partition 145 (146). As another example, the partition wall includes an inner partition wall 144 and an outer partition wall 145 (146).

The inner barrier rib 144 is inserted into and bonded to one surface of the body 120 to prevent moisture from flowing into the light source unit 110 in the air hole 122 direction.

The inner partition wall 144 is inserted in one side of the body 120 forming the periphery of the air hole 122.

The inner barrier ribs 144 may be coupled to one surface of the body 120 in an interference fit manner. Particularly, the inner partition wall 144 is tightly engaged with the inner coupling groove 210 to prevent moisture and foreign substances from entering from the outside. At this time, the inner joint groove 210 may be coated with an adhesive.

Specifically, the inner partition wall 144 is formed along the periphery of the cover hole 143 corresponding to the air hole 122 in the optical plate 142 and extends downward.

More specifically, the inner partition wall 144 defines a space 142a in which the first inner protrusion 221 is supported between the inner partition wall 144 and the cover hole 143 of the optical plate 142.

Further, in the embodiment, the lens cover 140 further includes outer barrier ribs 145 (146).

Of course, according to the embodiment, the lens cover 140 may include only the outer barrier ribs 145, 146, or only the inner barrier ribs 144, or may include the outer barrier ribs 145, 146 and the inner barrier ribs 144 It is possible. But is not limited thereto.

The outer barrier ribs 145 and 146 are inserted into and bonded to one surface of the body 120 to prevent water from entering the light source unit 110 from the edge of the body 120.

The outer barrier ribs 145 and 146 are inserted into the edge of one side of the body 120 to cover at least the light source unit 110.

The outer barrier ribs 145 and 146 may be coupled to one surface of the body 120 in an interference fit manner. In particular, the outer barrier ribs 145 (146) are tightly engaged with the outer engaging groove 228 to prevent moisture and foreign matter from entering from the outside. At this time, an adhesive may be applied to the outer engaging groove 228.

Specifically, the outer barrier ribs 145 and 146 are formed along the periphery of the lens cover 140 and extend downward. The outer barrier ribs 145 and 146 form a closed space in which at least the light source unit 110 is located as seen from above.

More specifically, the outer barrier ribs 145 and 146 are disposed to surround the outer surface of the substrate 112. Here, the outer surface will refer to a surface that is spaced apart from the air hole 122 in the surface surrounding the air hole 122 when viewed from above.

In addition, the outer barrier ribs 145 and 146 may be fitted together with the substrate 112 in the light source seating groove 121. Specifically, as shown in FIG. 6B, the first outer barrier rib 145 may be fitted in the light source receiving groove 121 together with the substrate 112.

As another example, the outer barrier ribs 145 and 146 (specifically, the first outer barrier rib 145) are inserted into the space 227 formed between the outer protrusion 225 and the outer surface (rim) of the substrate 112 .

For example, the outer barrier ribs 145 and 146 include a first outer barrier rib 145 and a second outer barrier rib 146.

The first outer barrier rib 145 is in contact with the outer surface of the substrate 112 and is disposed to surround the substrate 112.

The second outer barrier ribs 146 are spaced apart from the first outer barrier ribs 145 so as to surround the first outer barrier ribs 145. The second outer barrier rib 146 defines a cover groove 148 together with the first outer barrier rib 145.

An outer protrusion 225 is inserted into the cover groove 148 to be engaged therewith.

More specifically, the outer barrier ribs 145 (146) are spaced inwardly from the edges of the optical plate 142. That is, the outer barrier ribs 145 (146) define a space 142b that is seated in the cover seating groove 129 at the edge of the optical plate 142.

The lens cover 140 has alignment protrusions 142c which protrude from the optical plate 142 and are inserted into the alignment holes 115. [

Reference numeral 149 denotes a head groove in which the head of the fastener f is located.

At this time, the outer engaging groove 228 may be positioned and positioned at a distance from the edge of the cover seating groove 129.

The lens cover 140 further includes a fitting blade 147 that is inserted into the body 120.

The fitting wing 147 is fitted in a direction intersecting with the partition wall, thereby preventing the partition wall from being detached. For example, the fitting wings 147 may be formed protruding in the lateral direction (Z-axis direction) from the side surfaces of the lens cover 140. That is, the pair of fitting wings 147 are provided on opposite sides of the lens cover 140.

The fitting blade 147 suppresses the upward and downward flow of the lens cover 140 inserted downward and when the adhesive is applied to the partition seating of the lens cover 140 or the cover seating groove 129 of the body 120, The lens cover 140 is pressed downward.

Specifically, the fitting wings 147 may be formed protruding in the lengthwise or widthwise direction at both ends of the optical plate 142. More specifically, the fitting wing 147 is formed to correspond to the insertion groove 121b so as to be inserted into the insertion groove 121b formed in the body 120. [

Further, the lens cover 140 can be pressed downward by the resilient restoring force of the fitting blades 147. To this end, it is preferable that the thickness of the fitting blade 147 is a thickness having an elastic force.

For example, the fitting wing 147 is made of the same transparent resin material as the optical plate 142 of the lens cover 140, and the fitting wing 147 has a thickness thinner than the thickness of the optical plate 142 for elastic force. If the fitting wing 147 has a thickness smaller than the thickness of the optical plate 142, a space for inserting the fitting wing 147 can be formed without increasing the thickness of the body 120.

6B, the upper surface of the fitting blade 147 is located on the same line as the upper surface of the optical plate 142, and the lower surface of the fitting blade 147 is located on the optical plate 142, As shown in FIG.

The fitting wings 147 are inserted and coupled to one surface of the body 120 in the left-right direction. Specifically, the fitting wing 147 is inserted laterally into the body 120, which encloses at least two opposite faces of the side face of the optical plate 142.

For example, protruding ends 121a protruding upward from both ends of one surface of the body 120 surrounding the optical plate 142 are formed, and an insertion groove 121b into which the fitting blade 147 is inserted is formed into a protruding end 121a are formed to be recessed in the outer side direction. Herein, the inner side is a side located closer to the center of the body 120 than the outer side. That is, the insertion groove 121b is formed such that the inner surface of the protruding end 121a is depressed outward.

Of course, the insertion groove 121b may be formed by sinking the side surface of the cover receiving groove 129, as described later.

Hereinafter, the lens of the lens cover will be described in detail with reference to the drawings.

8A is a plan view of the lens according to an embodiment of the present invention, FIG. 8B is a sectional view taken along the line I-I 'in FIG. 8A, and FIG. 8C is a sectional view taken along the line II- Sectional view.

The lens 141 diffuses the light generated by the point light source 111. The diffusion angle of the light generated by the point light source 111 can be determined according to the shape of the lens 141.

Specifically, the lens 141 may include a material that transmits light.

For example, the lens 141 may be formed of transparent silicone, epoxy, and other resin materials.

The lens 141 can mold the point light source 111 in a convex shape.

The lens 141 may have various shapes. For example, the lens 141 has a shape in which at least two elliptical grooves 141a and 141b are combined to achieve a light diffusion effect.

The lens 141 according to an embodiment of the present invention includes a light source accommodating portion 19 in which a point light source 111 is accommodated. The light source accommodating portion 19 has a size enough to form an air layer between the point light source 111 and the lens 141. The light source accommodating portion 19 is a space defined by an inner curved surface 17 described later.

The reason for forming the air layer between the point light source 111 and the lens 141 as described above is to secure a distance for allowing the light emitted from the point light source 111 to diffuse to some extent before reaching the lens 141 I want to. Due to the air layer, the point light source may be spaced apart from the lens 141 by a predetermined distance

The lens 141 deflects the light incident from the point light source through the air layer existing inside the lens 141 symmetrically or asymmetrically according to the ancillary area and emits the light.

Specifically, the lens 141 may include an inner curved surface 17 formed by partially embedding a lower portion of the lens 141 and an outer curved surface 18 formed to be exposed to the outside.

The inner curved surface 17 can refract symmetrically or asymmetrically the light incident from the point light source through the air layer existing inside the lens 141. [ The inner curved surface 17 defines the light receiving portion 19.

For this purpose, the inner curved surface 17 may have the same or different shapes as seen in cross section perpendicular to the lens 141 along the first and second directions, which are perpendicular to each other. In the embodiment, as shown in Figs. 8B and 8C, the inner curved surface 17 may be formed symmetrically with respect to the direction in which the inner curved surface 17 is viewed.

Here, the first direction (X-axis direction) is the direction from the rear to the front of the irradiation region, and the second direction (Z-axis direction) means the lateral direction of the irradiation region perpendicular to the first direction.

For example, the inner curved surface 17 has a semicircular shape 17a on a cross section perpendicular to the lens 141 along the first and second directions. And, for symmetrical light diffusion, the center of the lens 141 is located on the same axis C as the center of the inner curved surface 17. Of course, for asymmetric light diffusion, the center of the lens 141 may be located on a different axis than the center of the inner curved surface 17, as described below.

At this time, the point light source 111 is accommodated in the light source accommodating portion 19 defined by the inner curved surface 17. The larger the light diffusion angle becomes, the larger the distance (thickness of the air layer) between the point light source 111 and the inner curved surface 17 is. For symmetrical light diffusion, the point light source 111 is preferably located on the same axis as the center of the inner curved surface 17. However, the present invention is not limited thereto.

The light generated by the point light source 111 is refracted at the interface between the point light source 111 and the air layer to increase the light conversion angle. Here, the increase in the optical conversion angle means that the angle between the optical axis C (parallel to the Y-axis) and the emitted light passing through the center of the point light source 111 is increased through each interface.

 The outer curved surface 18 refracts the light refracted by the inner curved surface 17 once again.

To this end, the outer curved surface 18 may be formed to have either a hemispherical surface, two hemispherical superposition, or an ellipsoidal surface.

At this time, the thickness of the optical lens 130, that is, the distance between the inner curved surface 17 and the outer curved surface 18 may vary depending on the position due to the difference in shape of the inner curved surface 17 and the outer curved surface 18 . Therefore, a path difference may occur depending on the position of the light emitted from the point light source and transmitted through the lens 141. As a result, the light emitted through the lens 141 can be further diffused.

In the case of a streetlight, they are arranged at a constant pitch along the longitudinal direction of the road. Therefore, light irradiated from the streetlight toward the width direction of the road requires little light diffusion, and light radiated toward the longitudinal direction of the road requires large light diffusion.

Therefore, the lens cover 140 of the embodiment is formed such that the light generated from the street lamp has a large light diffusion angle in the longitudinal direction of the road and a small light diffusion angle in the width direction of the road.

For example, the distance d6 between the inner curved surface 17 and the outer curved surface 18 on a section where the lens is vertically cut along the second direction is defined as the inner curved surface on the section cut perpendicularly to the lens along the first direction 17) and the outer curved surface (18). Then, it is possible to coincide with the longitudinal direction of the road in which the street lamp in the second direction is installed. Accordingly, the light generated by the point light source 111 has a larger photovoltaic angle along the second direction than in the first direction.

In addition, if the shape of the inner curved surface 17 is the same in the cross-section perpendicularly cut along the first direction and the second direction, the curvature of the outer curved surface 18 on the cross- The sectional width d2 is formed to be larger than the width d1 on the cross section of the outer curved surface 18 on the section cut perpendicularly to the lens along the first direction. Therefore, the light generated by the point light source 111 has a larger light diffusion angle along the second direction than in the first direction.

The shape of the outer curved surface 18 may be the same or different from each other on the cross section perpendicular to the lens 141 along the first direction and the second direction. In an embodiment, the outer curved surface 18 has a semicircular shape 18a on a section where the lens 141 is vertically cut along the first direction, and a cross-section where the lens 141 is cut vertically along the second direction The outer curved surface 18 has a shape 18b in which two semicircles are superimposed so that its center is concave. If the outer curved surface 18 has a shape 18b in which two semicircles overlap so that the center of the outer curved surface 18 is concave on the section perpendicular to the lens 141 along the second direction, (On the optical axis C) can be compensated for.

The design of the inner curved surface 17 and the outer curved surface 18 can partially block the light pollution caused by the backlight, but it is difficult to completely block the backlight.

To this end, the lens 141 includes a transmissive portion S2 and a backlight shut-off portion 15. [

The transmissive portion S2 means one region of the lens 141 where light generated by the point light source 111 is emitted to the irradiated region. In addition, the transmissive portion S2 means an area other than the backlight interruption portion 15 in the lens 141. [

The backlight shut-off unit 15 restricts the light emitted from the point light source 111 from being emitted to the rear of the irradiation area. The backlight shut-off section 15 covers one area S1 of the lens 141. [

The backlight shut-off section 15 covers a part of the area S1 behind the first direction of the lens 141 on the cross section perpendicularly cut along the first direction. Therefore, since the backlight blocking portion 15 restricts the light travel to the rear of the irradiation region, there is an advantage that the light pollution can be reduced.

Here, the back of the first direction means an arbitrary circumference centering on the point light source 111, and means the backward X-axis (upper left 90 degree region in FIG. 8B). The front in the first direction means an X axis forward (an upper right 90 degree region in FIG. 8B) on an arbitrary circumference with the point light source 111 as a center.

Specifically, the backlight cut-off portion 15 covers 10% to 40% of the area of the lens 141 on a section where the lens 141 is vertically cut along the first direction.

More specifically, a central angle (centered on the point light source 111) of the area occupied by the backlight interruption portion 15 on the cross section cut perpendicularly to the lens 141 along the first direction may be 1 to 80 degrees have. The light blocking portion 15 is not formed in the direct upward direction (Y-axis direction) of the point light source 111, and the transmissive portion S2 is formed. One end of the backlight shut-off section 15 is formed in contact with the optical plate 142 on a section where the lens 141 is vertically cut along the first direction.

The backlight blocking portion 15 may be positioned at various positions to cover one area of the lens 141. [

For example, as in the embodiment, the backlight shut-off section 15 can form one area of the outer curved surface 18 of the lens 141. [ If the backlight shut-off section 15 is located inside the lens 141, the manufacturing cost is increased and the manufacturing is not easy. If the backlight shut-off section 15 forms one region of the outer curved surface 18 of the lens, it is easy to manufacture by the double injection method and it is easy to add the additive as described later. Of course, as will be described later, the backlight cut-off portion 15 may form one area of the inner curved surface 17 of the lens 141. [

Since the optical plate 142 is usually formed of the same material as the transmissive portion S2, the optical plate 142 may further include an auxiliary blocking portion 16 to restrict the formation of the backlight through the optical plate 142 .

The auxiliary blocking portion 16 is disposed adjacent to the backlight blocking portion 15 in the optical plate 142 and blocks light from being emitted behind the irradiation region. Specifically, the auxiliary blocking portion 16 is formed in contact with the backlight blocking portion 15 on a section where the lens 141 is vertically cut along the first direction.

Further, the auxiliary blocking portion 16 is formed on the upper surface and / or the lower surface of the optical plate 142 for the convenience of manufacturing. It is preferable that the auxiliary blocking portion 16 is made of the same material as the backlight blocking portion 15.

The lens 141 is usually manufactured together with the optical plate 142 so as to facilitate the manufacture and facilitate the coupling while guiding the directions of the plurality of point light sources 111. [ Injection molding is generally used.

There is a problem that the manufacturing cost is increased if a separate operation is performed in order to form the backlight shut-off section 15 on the lens 141. [

Therefore, the backlight shut-off portion 15 can be manufactured by double injection together with the lens 141 or the transmission portion S2. At this time, the backlight shut-off unit 15 may be made of various materials having reflection characteristics.

Preferably, the post-exposure cut-off portion 15 may further include an additive imparting a reflection characteristic to the same material as the transmissive portion S2. In addition, when the backlight cut-off portion 15 forms one region of the surface of the lens 141, the additive can be easily applied to the mold at the time of injection molding.

Here, the transmissive portion S2 includes any one of polycarbonate (PC) and polymethylmethacrylate (PMMA), and the additive added to the backlight blocking portion 15 may be titanium oxide, And a metal oxide.

FIG. 9A is a cross-sectional view of a lens according to a second embodiment of the present invention taken along a first direction, and FIG. 9B is a cross-sectional view of a lens according to a second embodiment of the present invention, .

9, the lens 141 according to the second embodiment differs from the embodiment of FIG. 8 in that the shapes of the inner curved surface 17 and the outer curved surface 18 and the shape of the backlight blocking portion 15 and the auxiliary There is a difference in the position of the blocking portion 16.

The outer curved surface 18 of the second embodiment may be identical to each other on a cross section perpendicular to the lens 141 along each of the first and second directions perpendicular to each other. Overall, the outer curved surface 18 has a semicircular shape 18C symmetrical to each other on a cross section perpendicular to the lens 141 along the first and second directions.

In the case where the outer curved surface 18 is symmetrical on the cross section perpendicularly cut along the first and second directions respectively, in order to adjust the light diffusion direction, the inner curved surfaces 17 of the second embodiment are orthogonal to each other The shape of the lens 141 may be different from that shown on the cross-section taken along the vertical direction of the lens 141 along the first and second directions.

For example, as shown in Fig. 9, the inner curved surface 17 has a semicircular shape 17a on a section where the lens 141 is vertically cut along the first direction, and a lens 141 And the two semicircles overlap each other on the cross section cut perpendicularly.

In addition, the rearlight blocking portion 15 of the second embodiment forms a part of the inner curved surface 17 of the lens 141. [ When the backlight shut-off section 15 forms a part of the inner curved surface 17, it is possible to block light emitted to the rear of the irradiation area more effectively.

At this time, the auxiliary blocking portion 16 may be connected to the backlight shut-off portion 15 and may be located on the lower surface of the optical plate 142.

FIG. 10A is a cross-sectional view of a lens according to a third embodiment of the present invention taken along a first direction, and FIG. 10B is a cross-sectional view of a lens according to a third embodiment of the present invention, .

Referring to FIG. 10, there is a difference in the position of the inner curved surface 17 of the lens 141 according to the third embodiment, as compared with the embodiment of FIG.

In the third embodiment, the center of the inner curved surface 17 is biased from the center of the lens 141 toward the backlight blocking portion 15 on a cross section perpendicular to the lens 141 along the first direction. That is, the center of the inner curved surface 17 is positioned behind the center of the lens 141 on a section where the lens 141 is vertically cut along the first direction. This difference causes a difference in the thickness of the lens 141, resulting in a difference in the degree of light diffusion. In the case of the third embodiment, the light traveling forward in the first direction diffuses more and the light traveling backward in the second direction becomes relatively less diffused. At this time, the light traveling in the backward direction in the first direction is reflected by the backlight shut-off section 15 and advances upward and forward in the first direction, so that the light can be focused to the irradiated area in the first direction.

In the third embodiment, the distance d3 between the inner curved surface 17 and the outer curved surface 18 in the direction of the backlight shut-off portion 15 on the section where the lens 141 is vertically cut along the first direction is (D4) between the inner curved surface (17) and the outer curved surface (18) in the direction opposite to the direction of the backlight blocking portion (15). Therefore, the light traveling forward in the first direction diffuses more and the light traveling backward in the second direction becomes relatively less diffused.

Since the point light source 111 is positioned at the center of the inner curved surface 17, the area occupied by the backlight cut-off portion 15 in the lens 141 can be reduced.

11 is a view showing an air flow velocity distribution of a light emitting module in an embodiment.

Hereinafter, the air flow and heat radiation of the light emitting module will be described with reference to FIG.

Generally, the light emitting module 100 is installed so that the point light source 111 faces the gravity direction in order to illuminate an object on the ground.

When power is applied to the point light source 111, light is generated in the point light source 111 and heat is generated.

The heat generated by the point light source 111 is transmitted to the substrate 112 and the heat radiating pad 150 and diffused into the body 120, the air guiding unit 160, and the radiating fin 130.

In particular, most of the heat generated in the point light source 111 will be transferred to the body 120 having excellent heat transfer rate, the heat dissipation fin 130, and the air guide 160.

Therefore, a temperature difference is generated between the outside and the inside of the light emitting module 100.

Particularly, the inside of the air guide part 160 and the air hole 122 have a higher temperature than the outside of the light emitting module 100.

Accordingly, the air in the air guide part 160 and the air hole 122 receives the buoyant force and moves to the upper part, and cool air in the lower part of the outer area of the point light source 111 flows (chimney effect).

This circulation of air can maximize the heat dissipation effect of the external air and the point light source 111.

11, the flow rate of the air that has passed through the air hole 122 and the air guide portion 160 is faster than the flow rate of other air.

Therefore, the embodiment can have an effect of cooling using a fan without using a separate fan.

12 is a cross-sectional view of a light emitting module according to another embodiment of the present invention.

12, there is a difference between the position of the fitting wing 147-1 and the position of the insertion groove 121b-1, as compared with the embodiment shown in FIG. 6B, in the light emitting module of another embodiment.

The upper surface of the fitting blade 147-1 of another embodiment has a stepped portion located below the upper surface of the optical plate 142. [ That is, a space in which a part of the body 120 is positioned is formed on the upper portion of the fitting blade 147-1.

The body 120 of the other embodiment is different from the embodiment of FIG. 6 in that the protruding end 121a formed in the body 120 is omitted.

At this time, the insertion groove 121b-1 is formed by recessing the side surface of the cover receiving groove 129. Specifically, the insertion groove 121b is formed such that the inner side surface of the cover receiving groove 129 is depressed outward. The insertion grooves 121b-1 are formed on the inner surface of the pair of the cover seating grooves 129 facing each other.

When the insertion groove 121b-1 is formed by recessing the inner surface of the cover receiving groove 129, the rim 123 of the body 120 need not protrude. The upper surface of the optical plate 142 of the lens cover 140 is positioned on the same plane as the upper surface of the rim 123 of the body 120. In this case,

13 is a perspective view of a lighting apparatus including a light emitting module of the present invention.

Referring to FIG. 13, the lighting apparatus 1000 of the embodiment includes a main body 1100 for providing a space to which the light emitting module 100 is coupled and forming an outer space, a power supply unit (Not shown), and may include a connection portion 1200 connecting to the support portion.

The lighting apparatus 1000 of the embodiment can be installed indoors or outdoors. For example, the lighting apparatus 1000 of the embodiment can be used as a street lamp.

A plurality of frames 1110 may be formed in the main body 1100 to increase the space in which at least two light emitting modules 100 are located.

The connection unit 1200 has a built-in power supply unit, and connects the support unit (not shown) for fixing the main unit to the main unit.

The use of the lighting apparatus 1000 of the embodiment can effectively cool the heat generated in the light emitting module 100 due to the chimney effect and can reduce the manufacturing cost by not using a separate fan. Further, when the lighting apparatus 1000 of the embodiment is used, light pollution can be easily reduced by backlight.

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 exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: Light emitting module
120: Body
110: Light source unit
130:
122: Air hole
140: Lens cover
141: Lens

Claims (16)

At least one lens corresponding to the point light source and guiding light generated in the light source; And
And an optical plate on which the lens is disposed,
The lens,
A transmissive portion through which light generated from the point light source is emitted to an irradiated region,
And a backlight shut-off unit for restricting the light emitted from the point light source from being emitted to the rear of the irradiation area,
Wherein the afterglow shielding portion further comprises an additive imparting a reflection characteristic to the same material as the transmissive portion. The method according to claim 1,
The lens,
An inner curved surface which is formed to be exposed to an air layer existing inside and refracts the light incident from a point light source formed by interposing the air layer present therein; And
And an outer curved surface formed to be exposed to the outside and refracting the light refracted by the inner curved surface. 3. The method of claim 2,
Wherein the afterglow shielding portion forms one area of an inner curved surface or an outer curved surface of the lens. The method of claim 3,
Wherein the inner curved surface has a different shape as seen on a cross section perpendicularly cut along the first and second directions that are orthogonal to each other. 3. The method of claim 2,
Wherein the outer curved surface is formed to have one of a hemispherical surface and an ellipsoidal surface. The method of claim 3,
And a distance (d6) between the inner curved surface and the outer curved surface on a section cut perpendicularly to the lens along the second direction,
(D5) between the inner curved surface and the outer curved surface on a cross section perpendicularly cut along the first direction,
The backlight shut-
And covers a portion of the lens behind the first direction on a section cut perpendicularly to the lens along the first direction. The method according to claim 6,
A point light source is accommodated in the inner curved surface,
Wherein the center of the inner curved surface is positioned biased in the direction of the rear light blocking portion from the center of the lens on a section cut perpendicularly to the lens along the first direction. 8. The method of claim 7,
(D3) between the inner curved surface and the outer curved surface in the direction of the backlight shut-off portion is larger than the inner curved surface in the direction opposite to the direction of the backlight shut- Is smaller than a distance (d4) between curved surfaces. The method according to claim 6,
The backlight shut-
And one end of the optical plate is in contact with a section of the lens vertically cut along the first direction. The method according to claim 6,
The cross sectional width d2 of the outer curved surface on the cross section perpendicular to the second direction is smaller than the cross sectional width d1 of the outer curved surface on the cross section perpendicular to the first direction A lens cover characterized by a large. The method according to claim 1,
Wherein the transmissive portion and the backlight shut-off portion are formed by a double injection method. The method according to claim 1,
Wherein the transmissive portion is made of any one of polycarbonate (PC) and polymethylmethacrylate (PMMA). 13. The method of claim 12,
Wherein the additive added to the afterglow shutter is at least one of titanium oxide, a metal hydrous oxide, and a metal oxide. The method according to claim 1,
In the optical plate,
Further comprising an auxiliary blocking portion disposed adjacent to the backlight blocking portion and blocking light from being emitted behind the irradiation region. 15. The method of claim 14,
Wherein the auxiliary blocking portion further comprises an additive that imparts a reflective property to the same material as the transmissive portion. Body;
A light source unit including a circuit board positioned on one side of the body and having at least one point light source and a point light source positioned thereon;
A plurality of radiating fins positioned on the other surface of the body facing the one surface of the body;
An air hole formed on one surface of the body and penetrating the body in a direction of the other surface of the body, the air flowing through the body;
And a lens cover covering the light source unit and having a cover hole corresponding to the air hole,
Wherein the lens cover comprises:
At least one lens corresponding to the point light source and guiding light generated in the light source; And
And an optical plate on which the lens is disposed,
The lens,
A transmissive portion through which light generated from the point light source is emitted to an irradiated region,
And a backlight shut-off unit for restricting the light emitted from the point light source from being emitted to the rear of the irradiation area,
Wherein the backlight shut-off section further comprises an additive that imparts a reflection characteristic to the same material as the transmissive section.

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