KR101657358B1 - Lighting apparatus - Google Patents

Abstract

A lighting apparatus according to an embodiment of the present invention includes a light emitting module; And a housing for accommodating the light emitting module, wherein the light emitting module comprises: a substrate portion; A plurality of light sources mounted on the substrate unit; A blocking member disposed on an upper surface of the substrate portion to block diffusion of light emitted from the plurality of light source portions in a specific direction; And a plurality of diffusing lenses disposed on the light sources to diffuse the light emitted from the light sources, wherein the shielding member comprises: a base plate having a plurality of light source receiving holes through which the plurality of light sources penetrate; And a plurality of blocking ribs formed at edge portions of each of the plurality of light source receiving holes and a part of the base plate is bent upwardly.

Description

[0001]

The present invention relates to a lighting device.

BACKGROUND OF THE INVENTION [0002] An illumination device is an electric device used to brighten a specific space. An incandescent lamp, a discharge lamp, and a fluorescent lamp are widely used as light sources mainly used for illumination. A resistive light source such as an incandescent bulb has a disadvantage in that it has a low efficiency and generates a lot of heat. In the case of a discharge lamp, it is expensive and has a disadvantage of a high voltage. And, in the case of fluorescent lamps, there are environmental problems caused by the use of mercury.

In order to improve the disadvantages of such conventional light sources, there has been a growing interest in an illumination device using a light emitting diode (LED) as a light source, which has many advantages in terms of efficiency, color diversity, and design autonomy Currently, various types of LED lighting devices are on the market.

The light emitting diode is a semiconductor element that emits light when a voltage is applied in a forward direction, has a long life, low power consumption, and has electrical, optical, and physical characteristics suitable for a large amount of silicon. Therefore, it is now being spotlighted as an illumination means for replacing incandescent bulbs and fluorescent lamps.

In addition, LED light sources are rapidly being applied to street lamps, security lamps, parks, and lighting fixtures such as crime prevention.

On the other hand, lighting devices such as street lamps and crime-prevention lamps are installed mainly in the form of hanging on a pillar member, and it is necessary to be able to investigate the angle of light in the optimal state according to the surrounding environment. For example, in the case of street lamps installed near farmland where fruit trees or crops grow, light irradiation on the crops will cause a great deal of damage to crops. In addition, the road side where the pedestrians pass is not irradiated with sufficient light, which causes inconvenience to the walking. Therefore, it is desirable that most of the light emitted from the lighting apparatus is irradiated toward the road side and the amount of light irradiated toward the crops can be minimized.

In addition, in the case of a streetlight installed in a residential alley, when the light is irradiated toward the window of the house, the light of the street light is minimally irradiated to the house, .

However, a conventional conventional illumination apparatus generally irradiates a uniform amount of light downward in a 360 degree direction, and is not controlled so that light irradiation is performed in a specific direction. Particularly, since the light emitted from the lighting device is irradiated to an unnecessary area, the problem arises, and the illuminance of the area requiring illumination is reduced, so that the original purpose of the lighting device can not be sufficiently achieved.

<References>

Korean Patent Publication No. 2012-0130472

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems.

According to an aspect of the present invention, there is provided a lighting apparatus including: a light emitting module; And a housing for accommodating the light emitting module, wherein the light emitting module comprises: a substrate portion; A plurality of light sources mounted on the substrate unit; A blocking member disposed on an upper surface of the substrate portion to block diffusion of light emitted from the plurality of light source portions in a specific direction; And a plurality of diffusion lenses disposed on the light sources and diffusing light emitted from the light sources, wherein the light source includes a light emitting device including an LED chip and an encapsulant surrounding the light emitting device, Wherein the shielding member comprises: a base plate having a plurality of light-source-unit receiving holes through which the plurality of light-source units pass; a plurality of light-source-portion receiving holes formed at edge portions of the plurality of light- Wherein each of the plurality of blocking ribs is bent and extended upwardly at a position spaced apart from the edge of the light-receiving portion hole in the center direction, and each of the blocking ribs includes a plurality of blocking ribs And is rounded along the shape.

The light emitting module according to the embodiment of the present invention having the above-described structure and the lighting apparatus having the same have the following effects.

First, since the light emitted from the light source is not irradiated in a specific direction, there is an advantage that the problem that light is irradiated in an unnecessary direction can be solved.

Second, the light irradiated in a specific direction is reflected to a region requiring illumination, thereby blocking light irradiation in an unnecessary direction and raising the illuminance of a region requiring illumination.

Third, there is an advantage that it is not necessary to separately set up a blocking wall near the lighting device in order to prevent the light from being irradiated to the area where the lighting is unnecessary.

1 is a perspective view of a lighting device having a blocking member according to an embodiment of the present invention;
2 is a perspective view of a light emitting module including a blocking member according to an embodiment of the present invention;
3 is an exploded perspective view of the light emitting module.
4 is a perspective view of a blocking member according to an embodiment of the present invention.
Fig. 5 is a longitudinal sectional view taken along II of Fig. 2; Fig.

Hereinafter, a light emitting module according to an embodiment of the present invention and a lighting apparatus having the same will be described in detail with reference to the drawings.

1 is a perspective view of a lighting apparatus provided with a blocking member according to an embodiment of the present invention.

Referring to FIG. 1, a lighting apparatus 10 according to an exemplary embodiment of the present invention includes a housing 11, a plurality of light emitting modules 20 arranged adjacent to one side of the housing 11, And a control box 12 mounted on the base 11. A control unit for electrically controlling the plurality of light emitting modules 20 may be provided in the control box 12. The control unit may control the plurality of light emitting modules 20 on and off at the same time, or independently control them independently.

In the present embodiment, a plurality of light emitting devices are provided in the form of light emitting modules, and a plurality of light emitting modules are mounted, but the present invention is not limited thereto. That is, it is to be noted that the idea of the present invention can be applied to all the lighting apparatuses which need to limit the light irradiation in a specific direction.

FIG. 2 is a perspective view of a light emitting module including a blocking member according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the light emitting module.

2 and 3, a light emitting module 20 having a shield member according to an embodiment of the present invention includes a heat sink 21 for heat dissipation, A plurality of light source units 24 mounted on the substrate unit 23 and a plurality of light source units 24 mounted on the substrate unit 23, A cover plate 26 placed on the top surface of the shielding member 25 and a cover plate 26 placed on the light source unit 24 to prevent light emitted from the light source unit 24 from diffusing in a specific direction, A diffusion lens 27 provided on the cover plate 26 at a corresponding position and an adhesive member 233 for allowing the cover plate 26 to be coupled to the substrate portion 23. [

In detail, a plurality of light source units 24 may be disposed at a predetermined interval on the substrate unit 23, and a plurality of coupling holes 232 may be formed between the plurality of light source units 24. [ The plurality of fastening holes 232 have a fastening hole through which fastening members for coupling the base plate 23 and the blocking member 25 are passed and a fastening hole for fastening the base plate 23 and the cover plate 26 And a fastening hole through which the fastening member is inserted.

The adhesive member 233 may be attached to the edge of the substrate portion 23, and the adhesive member 233 may be a double-sided adhesive tape. The cover plate 26 can be more stably coupled to the substrate portion 23 by the adhesive member 233. [ A connector 231 for supplying power to the plurality of light source units 24 may be mounted on one edge of the substrate unit 23.

The heat sink 21 is a heat dissipating means for dissipating the heat generated from the light source unit 24 to the outside, and may be made of an aluminum material having good heat dissipation characteristics. In addition, a seating part on which the members including the heat radiating pad 22 to the cover plate 26 are seated can be formed on one surface of the heat sink 21 so as to be stepped to a predetermined depth. A plurality of heat dissipation fins 212 may protrude from the other surface of the heat sink 21. The plurality of radiating fins 212 are spaced apart from each other by a predetermined distance and heat exchange is performed with air flowing between the adjacent radiating fins 212.

Further, a sealing member including a gasket or an O-ring may be surrounded at the edge of the seat. The sealing member 28 is in contact with the cover plate 26 to block foreign substances including dust as well as moisture from entering the light source 24.

In addition, the heat-radiating pad 22 may be a heat-radiating plate that is placed on the bottom surface of the base 23, and the heat-radiating pad 22 may not be required depending on the light-emitting module.

The cover plate 26 covers and protects the light source unit 24 and the blocking member 25. In detail, a plurality of through holes are formed inside the cover plate 26, and the diffusion lens 27 may be mounted on the through holes. Alternatively, the diffusing lens 27 and the cover plate 26 may be formed of a transparent plate made of the same material by injection molding. A fastening hole may be formed at a position of the cover plate 26 between the diffusion lenses 27. The fastening member passing through the fastening hole passes through the substrate portion 23 so that the cover plate 26 is fixed to the substrate portion 23.

The diffusing lens 27 diffuses light emitted from the light source unit 24 and diffuses light in a specific direction according to the geometric shape of the diffusing lens 27, .

In detail, the diffusing lens 27 is made of at least one material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyepoxy (PE) (PMMA) as a material.

The diffusing lens 27 may have a convexly rounded dome shape and may have a spherical or aspherical shape according to design conditions based on light diffusion characteristics. Alternatively, the diffusing lens 27 may be symmetrical or asymmetrical with respect to the vertical plane. The light emitted from the light source unit (24) is refracted while passing through the diffusion lens (27) to form a specific type of light distribution. That is, it is possible to form a light distribution curve in which a large amount of light is irradiated in a specific direction according to the geometric shape and the difference in thickness of the diffusion lens 27.

4 is a perspective view of a blocking member according to an embodiment of the present invention.

4, a blocking member 25 according to an embodiment of the present invention includes a base plate 251 placed on the base plate 23, and a base plate 251, And a blocking rib 253 that prevents light emitted from the light source section 24 from diffusing in a specific direction.

In detail, a plurality of light-receiving portions 252 may be formed on the inner side of the base plate 251. The light source unit receiving hole 252 is formed at a position corresponding to the mounting position of the light source unit 24. When the blocking member 25 is placed on the upper surface of the substrate unit 23, the light source unit 24 passes through the light source unit accommodation hole 252 and is positioned below the diffusion lens 27.

The number of the light source unit receiving holes 252 may be determined by the size of the base plate 251. In the illustrated embodiment, four base portions 251 are formed with four light-receiving portions 252 to cover four light-source portions 24. Although a plurality of blocking members 25 are disposed adjacent to each other, the present invention is not limited thereto, and a single blocking member 25 may be formed long.

The blocking rib 253 may be formed to be rounded at a predetermined curvature so as to surround the light source unit 24 and to extend upward from the edge of the light source unit accommodation hole 252.

A center hole 255 may be formed in the center of the base plate 251 and a plurality of fastening holes 254 may be formed in the periphery of the center hole 255. The fastening member passing through the cover plate 26 passes through the center hole 255 and is inserted into the fastening hole 232 formed in the base plate 23. The fastening member passing through the fastening holes 254 is inserted into another fastening hole 232 of the base plate 23. That is, the fastening holes 254 are fastening holes provided for coupling the blocking member 25 and the base plate 23, and the center holes 255 are fastened through the cover plate 26 Hole for allowing the member to be inserted into the substrate portion 23.

5 is a longitudinal sectional view taken along line I-I of FIG.

5, the light source unit 24 according to the embodiment of the present invention includes a chip on-board LED or a surface mount device LED mounted directly on the substrate unit 23, And a light source. In the present embodiment, a surface mount LED package is taken as an example.

In detail, the light source unit 24 includes a submount substrate 241 placed on the substrate, a light emitting element 242 including an LED chip mounted on the upper surface of the submount substrate 241, And an encapsulant 243 that covers the top surface of the substrate.

More specifically, the light emitting device 242 may be a blue light emitting diode, and the encapsulant 243 may be seated on the submount substrate 241 in the form of a hemispherical lens. A yellow phosphor may be applied to the inner circumferential surface of the encapsulant 243 to emit white light from the light source unit 24. Here, the encapsulant 243 may be provided in a hemispherical shape filled with a transparent resin mixed with a fluorescent material.

An air layer is formed between the encapsulant 243 and the bottom surface of the diffusion lens 27 so that light emitted from the light emitting element 242 is primarily refracted while passing through the encapsulant 243. [ do. The light that is refracted while passing through the diffusion lens 27 is secondarily refracted, and the light refracted while passing through the diffusion lens 27 is diffused in multiple directions. Further, depending on the shape of the diffusing lens 27, the light can be more refracted and diffused in a specific direction. In addition, the refractive angle of the diffusing lens 27 varies depending on the point where the light emitted from the light emitting device 242 collides with each other, so that light can be diffused more in a specific direction.

The blocking ribs 253 are provided to absorb or reflect a part of the light emitted from the light source unit 24 and to prevent the diffusion of light in a specific direction.

The blocking member 25 on which the blocking ribs 253 are formed may be formed of a material such as polyacetal (POM), polyamide (PA), polycarbonate (PC), modified polyphenylene ether (m- And can be molded into an engineering plastic having excellent heat resistance.

In addition, a blocking layer for reflecting or absorbing light may be formed on the inner surface of the blocking rib 253, that is, the surface where light emitted from the light source unit 24 collides.

In detail, the blocking layer may be a reflective layer that reflects light emitted from the light source part 24 to the opposite side. The reflective layer may comprise a reflective sheet comprising a metal or metal oxide having a high specular reflectivity such as aluminum, silver, nickel, chromium, gold or titanium dioxide. The reflective layer may be formed on the blocking surface 253 by a deposition or coating process, or may be formed by printing metallic ink.

As the deposition method, a physical vapor deposition (PVD) method or a vacuum evaporation method including a thermal evaporation method, an evaporation method and a sputtering method may be used. And the coating or printing method may include a printing method, a gravure coating method or a silk screen method.

In addition, the blocking ribs 253 may be rounded at a predetermined curvature along the shape of the encapsulant 243.

In addition, the reflective layer may include a white reflective sheet (or a white reflective film) made of white PolyEthylene-Terephthalate in which the characteristics of mirror reflection and diffuse reflection are mixed.

The blocking member 25 itself may be made of an engineering plastic made of TPA (Terephthalic Acid) having a white color, and may reflect light emitted from the light source unit 24.

Meanwhile, the blocking layer may be a light absorbing layer or an optical abosortion layer capable of absorbing light emitted from the light source 24. For example, the barrier layer may include a black-based film sheet that is adhered, printed, or coated on the inner side of the blocking ribs 253.

Alternatively, the blocking layer may be formed by depositing a metal chalcogenide light absorbing material on the inner surface of the blocking ribs 253. Of course, the blocking member 25 itself may be an engineering plastic member including a light absorbing material. For example, the blocking member 25 itself may be an injection molded with a black resin.

When the light blocking layer 255 is a light absorbing layer that absorbs light, the illumination efficiency may be lower than that in the case where light is reflected in a direction requiring illumination. However, The same effect as that of the reflective layer can be obtained.

Claims (9)

A light emitting module; And
And a housing for receiving the light emitting module,
The light emitting module includes:
A substrate portion;
A plurality of light sources mounted on the substrate unit;
A blocking member disposed on an upper surface of the substrate portion to block diffusion of light emitted from the plurality of light source portions in a specific direction; And
And a plurality of diffusion lenses placed on the light sources to diffuse light emitted from the light sources,
The light source unit includes:
A light emitting element including an LED chip,
And an encapsulant surrounding the upper surface of the light emitting element,
The blocking member
A base plate having a plurality of light source unit receiving holes through which the plurality of light source units pass,
And a plurality of blocking ribs formed at an edge portion of each of the plurality of light-source accommodating holes, wherein a part of the base plate is bent upward,
Wherein each of the plurality of blocking ribs is bent and extended upward at a point spaced from the edge of the light-receiving portion hole in the center direction,
Wherein each of said blocking ribs is rounded along the shape of said encapsulant. delete delete The method according to claim 1,
Wherein a blocking layer for reflecting or absorbing light emitted from the light source portion is formed on an inner surface of the blocking rib. 5. The method of claim 4,
Wherein the barrier layer comprises:
A reflection sheet comprising a metal or a metal oxide including any one of aluminum, silver, nickel, chromium, gold, or titanium dioxide so as to mirror-reflect the light emitted from the light source;
And a white reflective sheet made of a PET material that reflects and diffuses the light emitted from the light source part. 6. The method of claim 5,
Wherein the blocking layer is deposited, coated or printed on the inner surface of the blocking rib. 5. The method of claim 4,
Wherein the barrier layer comprises:
And a light absorbing layer including a light absorbing material for absorbing light emitted from the light source and being adhered, deposited, printed, or coated on an inner surface of the blocking rib. The method according to claim 1,
The light emitting module includes:
And a heat sink for radiating heat generated by the light source unit to the outside by placing the substrate on one surface. 9. The method of claim 8,
And a control box mounted on one side of the housing and having a control unit for electrically controlling the light emitting module.

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