KR101927256B1 - Lighting device - Google Patents

Abstract

An embodiment relates to a lighting device.
A lighting apparatus according to an embodiment includes: a heat dissipating body; A driver including a circuit board disposed on the heat radiator and a component disposed on the circuit board; A light source unit disposed on the heat discharging body and receiving power from the driving unit to emit light; A housing coupled to the heat discharging body and housing the driving unit and the light source unit; And a heat dissipation pad disposed between the circuit board of the driving unit and the heat dissipation member, wherein the heat dissipation pad is disposed on a part of the heat dissipation member, and the heat dissipation member includes a remaining portion excluding a part of the heat dissipation member And the circuit board of the driving unit is disposed on the support member of the heat radiation pad and the heat radiation member.

Description

LIGHTING DEVICE

An embodiment relates to a lighting device.

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. Therefore, much research has been conducted to replace conventional light sources with light emitting diodes. Light emitting diodes are increasingly used as light sources for various lamps used in indoor / outdoor, liquid crystal display devices, electric sign boards, streetlights, and the like .

US2011 / 0157901A WO 2011-141846 A2 JP 2010-146952 A

The embodiment provides a lighting apparatus having a simple internal structure.

Further, the embodiment provides a lighting device capable of separating the light source unit and the driving unit.

In addition, the embodiment provides an illumination device capable of improving light efficiency.

In addition, the embodiment provides a lighting device capable of improving reflection efficiency.

Furthermore, the embodiment provides a lighting device that is easy to assemble internal components.

A lighting apparatus according to an embodiment includes: a heat dissipation member having a fastening hole; A driver including a circuit board disposed on the heat radiator and a component disposed on the circuit board; A light source unit disposed on the heat discharging body and receiving power from the driving unit to emit light; And a housing coupled to the heat dissipating body and housing the driving unit and the light source unit, wherein the housing has a fastening unit corresponding to the fastening hole of the heat dissipating unit, and the housing is coupled to the heat dissipating unit, The fastening portion of the housing fixes the circuit board of the driving portion.

By using the illumination device according to the embodiment, a lighting device having a simple internal structure can be obtained.

Further, the light source unit and the driving unit can be separated from each other.

Further, the light efficiency can be improved.

Further, the reflection efficiency can be improved.

In addition, there is an advantage that the assembling of the internal structures is simple.

1 is a perspective view of a lighting apparatus according to an embodiment viewed from above;
2 is a perspective view of the lighting device shown in Fig. 1 as viewed from below.
3 is an exploded perspective view of the illumination device shown in Fig.
4 is an exploded perspective view of the illumination device shown in Fig.
5 is a cross-sectional perspective view of the illumination device shown in Fig.
6 is a cross-sectional view of the illumination device shown in Fig.
7 is a three-dimensional view of a reflective sheet.
8 is a development view of the reflection sheet shown in Fig.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely reflect the actual size.

In the description of embodiments according to the present invention, it is to be understood that where an element is described as being formed "on or under" another element, On or under includes both the two elements being in direct contact with each other or one or more other elements being indirectly formed between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

Hereinafter, a lighting apparatus according to an embodiment will be described with reference to the accompanying drawings.

1 is a perspective view of the lighting apparatus shown in Fig. 1, Fig. 3 is an exploded perspective view of the lighting apparatus shown in Fig. 1, and Fig. 4 is an exploded perspective view of the lighting apparatus shown in Fig. FIG. 5 is an exploded perspective view of the illumination device shown in FIG. 1, and FIG. 6 is a sectional view of the illumination device shown in FIG.

1 to 6, an illumination apparatus according to an embodiment includes a housing 100, an optical plate 200, a reflector 300, a light source 400, a driver 500, and a heat sink 600 . Hereinafter, each component will be specifically described.

<Housing 100>

The housing 100 may house the optical plate 200, the reflector 300, the light source unit 400, the driving unit 500, and the heat sink 600. The housing 100 together with the heat discharging body 600 can constitute an appearance of the lighting apparatus according to the embodiment.

The housing 100 may be cylindrical. However, the present invention is not limited to this, and the housing 100 may be polygonal.

The housing 100 is hollow to accommodate the optical plate 200, the reflector 300, the light source unit 400, the driving unit 500, and the heat sink 600. The housing 100 is in a state in which the upper and lower surfaces of the cylinder are open. Therefore, the housing 100 may have two openings. For convenience of explanation, the two openings are named as the upper opening 110a and the lower opening 110b, respectively.

The optical plate 200, the reflector 300, the light source unit 400, the driving unit 500 and the heat discharging unit 600 are sequentially housed in the side of the upper opening 110a through the lower opening 110b of the housing 100, do.

The optical plate 200 is disposed in the upper opening 110a of the housing 100. [ Specifically, the diameter of the upper opening 110a is designed to be smaller than the diameter of the optical plate 200, so that the optical plate 200 can be disposed in the upper opening 110a of the housing 100. [

A heat discharging body 600 is disposed in a lower opening 110b of the housing 100. Specifically, the base portion 610 of the heat discharging body 600 may be disposed in the lower opening 110b of the housing 100.

The housing 100 may have a fastening portion 130. The fastening part 130 may be disposed on the inner surface of the housing 100 and may be disposed on the lower end of the housing 100. The fastening portion 130 may protrude outward from the inner surface of the housing 100.

The fastening member 130 may be inserted and fixed to the fastening part 130. The fastening member may pass through the fastening hole 613 of the heat dissipating body 600 and may be coupled to the fastening part 130. Here, as an example of the fastening member, a screw may be included.

5 and 6, the fastening part 130 may be a means for fixing the driving part 500 to the inside of the housing 100. As shown in FIG. Specifically, the fastening portion 130 is disposed on the circuit board 510 of the driving unit 500 to prevent the circuit board 510 from moving upward. The coupling part 130 can block the movement of the circuit board 510 together with the supporting part 615 of the heat discharging body 600 and the heat radiating pad 700. [ That is, a support portion 615 and a heat radiation pad 700 are disposed under the circuit board 510, and fastening portions 130 are disposed on the circuit board 510 to block the movement of the circuit board 510.

The housing 100 may have a jaw 150. The jaw 150 protrudes outward from the outer surface of the housing 100, and may be a plurality of jaws. The jaw 150 may be for securing the illumination device according to the embodiment to a specific location.

The housing 100 may have a groove 170. The protrusion 530 of the driving unit 500 and the auxiliary stopper 180 may be inserted into the groove 170.

The housing 100 may have an auxiliary stopper 180. The auxiliary stopper 180 is inserted into the groove 170 of the housing 100. The auxiliary stopper 180 blocks the groove 170 together with the protrusion 530 of the driving unit 500.

The housing 100 may have a key 190. The key 190 is used to indicate a coupling direction and a coupling position of the driving unit 500 and the heat discharging unit 600 when the driving unit 500 and the heat discharging unit 600 are disposed in the lower opening 110b of the housing 100 It plays a role. The key 190 may have a groove shape extending from the outer surface to the inner surface of the housing 100. Further, the key 190 may have a shape protruding outward from the inner surface of the housing 100. The key 190 may be inserted into the key groove 550 of the driver 500 and inserted into the key groove 611 of the heat sink 600.

The key 190 may have a different shape from a portion of the driving unit 500 that engages with the key groove 550 and a portion of the heat sink 600 that engages with the key groove 611. Specifically, the key 190 may include a first key inserted into the key groove 500 of the driver 500 and a second key inserted into the key groove 611 of the heat sink 600. The first key may be larger in volume than the second key. Therefore, the key groove 500 of the driving part 500 inserted into the first key may be larger than the key groove 611 of the heat sink 600 inserted into the second key.

<Optical plate 200>

The optical plate 200 is disposed in the housing 100. Specifically, the optical plate 200 can be disposed in the upper opening 110a of the housing 100. [

The optical plate 200 is sandwiched between the housing 100 and the reflector 300 by the combination of the housing 100 and the heat discharging body 600 so that the upper opening 110a of the housing 100 can be connected without any separate fastening means, As shown in FIG. This is possible because the diameter of the optical plate 200 is larger than the diameter of the upper opening 110a of the housing 100. [

The outer surface or inner surface of the optical plate 200 may be coated with a milky white paint. The coating material may include a diffusing agent for diffusing light passing through the optical plate 200.

The material of the optical plate 200 may be glass. However, the optical plate 200 may be made of plastic, polypropylene (PP), polyethylene (PE), or the like, because the glass is weak in weight or external impact. (PC) for light diffusion preferably having good light resistance, heat resistance and impact strength characteristics.

The roughness of the inner surface of the optical plate 200 may be larger than the roughness of the outer surface of the optical plate 200. [ If the roughness of the inner surface of the optical plate 200 is larger than the roughness of the outer surface of the optical plate 200, the light from the light source 400 can be sufficiently scattered and diffused.

The optical plate 200 can excite the light from the light source unit 400. [ The optical plate 200 may have a phosphor to excite light from the light source unit 400. [ The phosphor may include at least one of a garnet system (YAG, TAG), a silicate system, a nitride system, and an oxynitride system. The optical plate 200 includes a phosphor of a yellow series and can convert light from the light source 400 into natural light (white light). However, in order to improve the color rendering index and reduce the color temperature, the green plate- . &Lt; / RTI &gt; Here, the addition ratio of the phosphor according to the color may be a green-based phosphor rather than a red-based phosphor, and a yellow-based phosphor rather than a green-based phosphor. YAG, silicate, and oxynitride systems of the garnet system may be used as the yellow phosphor, silicate system and oxynitride system may be used as the green system phosphor, and nitrides may be used as the red system phosphor. have.

<Reflector 300>

The reflector 300 is disposed in the housing 100. Specifically, the reflector 300 may be housed in the inner space of the housing 100 through the lower opening 110b of the housing 100. [

The reflector 300 is disposed on the light source unit 400. Specifically, the reflector 300 may be disposed on the substrate 410 of the light source unit 400. The reflector 300 may be pressed by the optical plate 200 and the substrate 410 and fixed inside the housing 100.

The reflector 300 can fix the optical plate 200 to the upper opening 110a of the housing 100 by coupling the housing 100 and the heat discharger 600. [

The reflector 300 may include a reflective portion 310 and a guide portion 330.

The reflector 310 reflects the light from the light source 400 to the optical plate 200.

The reflector 310 may have a cylindrical shape increasing in diameter toward the substrate 410. The lower end of the reflector 310 is disposed on the substrate 410, and the optical plate 200 is disposed on the upper end.

The reflective portion 310 has a reflective surface 310a that forms a predetermined angle a with the upper surface of the substrate 410. The predetermined angle a may be an obtuse angle.

The optical plate 200 is disposed on the reflecting portion 310. The reflective surface 310a of the reflective portion 310 may be at an acute angle b with the inner surface of the optical plate 200. [

The guide portion 330 is disposed on the reflecting portion 310. The guide portion 330 may protrude upward from the reflecting portion 310. The guide portion 330 guides the outer periphery of the optical plate 200.

&Lt; Reflective sheet 3000 >

The illumination device according to the embodiment may further include a reflection sheet. This will be described in detail with reference to FIGS. 7 to 8. FIG.

7 is a three-dimensional view of the reflection sheet 3000. Fig.

Referring to FIG. 7, the reflective sheet 3000 may be disposed on the reflective surface 310a of the reflector 300 shown in FIGS. Specifically, the reflective sheet 3000 may be arranged to be in contact with the reflective surface 310a.

The reflective sheet 3000 has a shape corresponding to the reflective surface 310a. The reflective sheet 3000 may have an inner surface 3000a and an outer surface 3000b.

The inner surface 3000a reflects the light from the light source unit 400. [ The outer surface 3000b makes surface contact with the reflecting surface 310a. Here, the outer surface 3000b may be coated with an adhesive material for adhesion to the reflecting surface 310a.

8 is an exploded view of the reflective sheet 3000 shown in Fig. Here, the developed view of the reflection sheet 3000 shown in Fig. 8 is an example of the reflection sheet 3000 shown in Fig.

Referring to FIG. 8, the reflective sheet 3000 may include a base sheet 3100 and a connection sheet 3500.

The base sheet 3100 is a circular sheet having a radius of c. The circular sheet has a circular opening with a radius d. The circular opening is disposed at the center of the base sheet 3100. Therefore, the base sheet 3100 has a donut shape. Further, the donut-shaped base sheet 3100 has a shape in which a portion is removed. Thus, the base sheet 3100 has one end and the other end. The base sheet 3100 is not limited to a circular sheet. The base sheet 3100 may be a straight sheet.

The base sheet 3100 has at least two first and second cuts 3110 and 3150. Specifically, the first and second incisions 3110 and 3150 are disposed on one end side of the base sheet 3100. The cut lengths of the first and second incisions 3110 and 3150 may be the same as the width of the second connection portion 3530 of the connection sheet 3500.

The connecting sheet 3500 may extend from one end of the base sheet 3100 to the other end of the base sheet 3100. This connecting sheet 3500 engages with the first and second cutouts 3110 and 3150 of the base sheet 3100.

Specifically, the connecting sheet 3500 may include a first connecting portion 3510, a second connecting portion 3530, and a third connecting portion 3550. The third connection portion 3550 is connected to the other end of the base sheet 3100. The second connection portion 3530 is connected to the third connection portion 3550 and the first connection portion 3510 is connected to the second connection portion 3530 do. The first connection portion 3510 and the third connection portion 3550 have the same width but the second connection portion 3530 has a width smaller than that of the first and third connection portions 3510 and 3550.

The first connection portion 3510 enters the first cutout portion 3110 from the back surface of the base sheet 3100 and sequentially passes through the first cutout portion 3110 and the second cutout portion 3150, 3100).

The second connection portion 3530 is disposed on the front surface of the base sheet 3100 after passing through the first cutout portion 3110 along the first connection portion 3510.

The third connection portion 3550 moves along the second connection portion 3530 and is disposed on the back surface of the base sheet 3100.

8, the width of the second connection portion 3530 is smaller than the width of the first and third connection portions 3510 and 3550 and the width of the first and second cutouts 3110 and 3150 Since the cutting length is the same as the width of the second connecting portion 3530, the connecting sheet 3500 and the base sheet 3100 are advantageous in that they are difficult to separate after being combined.

The reflective sheet 3000 shown in FIGS. 7 and 8 has an advantage that it can be easily installed on the reflector 300 after the assembly is simple, and it is not necessary to embody the reflector 300 as a reflective material, There is an advantage that the cost is reduced.

&Lt; Light source unit (400)

The light source unit 400 has a light emitting element 340 that emits light.

The light source unit 400 is disposed on the heat sink 600. Specifically, the light source unit 400 is disposed on the protruding portion 630 of the heat sink 600.

The light source unit 400 may include a substrate 410 and a light emitting device 430 disposed on the substrate 410.

The substrate 410 has a circular plate shape, but is not limited thereto and may have various shapes. For example, a polygonal plate shape. The substrate 410 may be a printed circuit pattern on an insulator. For example, the substrate 410 may be a printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, . In addition, a COB (Chips On Board) type that can directly bond an unpackaged LED chip on a printed circuit board can be used. In addition, the substrate 410 may be formed of a material that efficiently reflects light, or may be formed of a color whose surface efficiently reflects light, for example, white, silver, or the like.

The substrate 410 is disposed between the heat discharging body 600 and the reflector 300. Specifically, the substrate 410 is disposed on the protrusion 630 of the heat discharger 600, and the reflector 300 is disposed on the substrate 410. In addition, the substrate 410 is disposed on the driving unit 500 and physically separated from the driving unit 500. That is, the substrate 410 and the driving unit 500 are spaced apart from each other. When the light source unit 400 and the driving unit 500 are physically or spatially separated from each other, the heat from the driving unit 500 is not directly transmitted to the light source unit 400, There is an advantage that the circuit components of the driving unit 500 can be protected by not being directly transmitted to the driving unit 500. In addition, since the driving unit 500 and the light source unit 400 are disposed independently of each other, there is an advantage that maintenance and repair are easy.

The substrate 410 may have a hole 415. The hole 415 is engaged with the key 631 of the heat discharging body 600. The combination of the hole 415 and the key 631 can identify the joining direction and joining position of the substrate 410 disposed on the protruding portion 630 of the heat discharging body 600. Further, the fastening member can be inserted into the hole 415. [ The fastening member may be inserted into the hole 415 and coupled to the fastening hole 633 of the heat discharging body 600. Through this, the substrate 410 can be coupled with the heat discharging body 600. The holes 415 of the substrate 410 may be larger than the fastening holes 633 of the heat discharging body 600 so that the fastening member and the key 631 of the heat discharging body 600 are inserted together.

The substrate 410 may have a connection substrate 450 to be electrically connected to the circuit board 510 of the driving unit 500. The connecting substrate 450 may extend from one side of the substrate 410 to the outside.

The connection board 450 and the circuit board 510 may be connected through a wire. In addition, the connection board 450 and the circuit board 510 may be electrically connected to each other through a separate independent connector without using wires.

A plurality of light emitting devices 430 are disposed on one surface of the substrate 410.

The light emitting device 430 may be a light emitting diode chip that emits red, green, or blue light, or a light emitting diode chip that emits UV light. Here, the light emitting diode may be a lateral type or a vertical type, and the light emitting diode may emit blue, red, yellow, or green. .

The light emitting element 430 may have a phosphor. The phosphor may include at least one of a garnet (YAG, TAG), a silicate, a nitride, and an oxynitride when the light emitting diode is a blue light emitting diode can do.

<Driving unit 500>

The driving unit 500 receives power from the outside and converts the supplied power to the light source unit 400. Then, the converted power is supplied to the light source unit 400.

The driving unit 500 is housed in the housing 100 and disposed on the base unit 610 of the heat discharging unit 600.

The driving unit 500 may include a circuit board 510 and a plurality of components 520 mounted on the circuit board 510. The plurality of components 520 may include, for example, a DC converter that converts an AC power supplied from an external power source to a DC power source, a driving chip that controls driving of the light source unit 400, an ESD An electrostatic discharge protection device, and the like.

The circuit board 510 has a circular plate shape, but is not limited thereto and may have various shapes. For example, an elliptical or polygonal plate shape. The circuit board 510 may be a circuit pattern printed on an insulator.

The circuit board 510 may be disposed between the support portion 615 of the heat dissipator 600 and the fastening portion 130 of the housing 100 and fixed within the housing 100.

Alternatively, the circuit board 510 may be disposed between the heat dissipating pad 700 and the fastening part 130 of the housing 100 and fixed within the housing 100. If the heat radiating pad 700 is disposed only on a part of the heat radiating body 600, the circuit board 510 is connected to the supporting portion 615, the heat radiating pad 700 and the housing 100 of the heat radiating body 600 And may be fixed within the housing 100 by a fastening portion 130.

The circuit board 510 may have a stencil 530. The stone publication 530 may have a shape protruding or extending outwardly from the circuit board 510. Unlike the circuit board 510, the stone plate 530 is disposed outside the housing 100, and is supplied with power from the outside.

The stone plate 530 is inserted into the groove 170 of the housing 100 and can be fixed to the housing 100 by the auxiliary stopper 180.

The circuit board 510 may have a keyway 550. A key 190 of the housing 100 is inserted into the key groove 550. The coupling direction and the coupling position of the circuit board 510 can be identified by the key groove 550.

The circuit board 510 may have an insertion hole 560. The insertion hole 560 may be disposed at the center of the circuit board 510. The projecting portion 630 of the heat sink 600 is inserted into the insertion hole 560. The protrusion 630 of the heat dissipator 600 is disposed to pass through the insertion hole 560 so that the light source 400 and the driver 500 can be separated from each other either spatially or physically.

The circuit board 510 may have a groove 515. The fastening portion 130 of the housing 100 can be inserted into the groove 515. When the fastening portion 130 is inserted into the groove 515, the movement of the circuit board 510 can be prevented, and the placement direction and position of the circuit board 510 can be identified.

<Heat Sink 600>

The heat discharging body 600 dissipates heat from the light source unit 400 and the driving unit 500.

The heat discharging body 600 may have a base portion 610 and a protruding portion 630.

The base portion 610 may have a circular plate shape having a predetermined thickness and may have a first surface on which the circuit board 510 is disposed. The protrusion 630 may have a shape protruding or extending upward from the center of the base portion 610 and may have a second surface on which the substrate 410 is disposed. Here, the first surface and the second surface have predetermined steps. The second side is located on the first side. Due to the step difference between the first surface and the second surface, the substrate 410 and the circuit board 510 can be spatially separated.

The circuit board 510 of the driving unit 500 is disposed on the base unit 610 and the substrate 410 of the light source unit 400 is disposed on the protruding unit 630. The protrusion 630 passes through the insertion hole 560 of the circuit board 510. The light source unit 400 and the driving unit 500 are physically or spatially separated from each other by the base unit 610 and the protruding unit 630. The light source unit 400 may be disposed on the driving unit 500 within the housing 100 by the base unit 610 and the protrusion unit 630.

The protrusion 630 may be integral with the base portion 610. That is, the protruding portion 630 and the base portion 610 may be manufactured by diecasting, and the protruding portion 630 and the base portion 610 may be made of one object. In addition, the protruding portion 630 and the base portion 610 can be coupled to each other in an independent configuration.

The base portion 610 may have a key groove 611. The key groove 611 may be a groove extending in the direction of the protrusion 630 from the outer periphery of the base portion 610. A key 190 of the housing 100 is inserted into the key groove 611. The engaging direction of the heat discharging body 600 and the engaging position can be easily distinguished by the key groove 611. [

The base portion 610 may have a hole 613 through which the fastening member passes. The fastening member is inserted into the hole 613 and engaged with the fastening portion 130 of the housing 100. The number of the holes 613 may be the same as the number of the fastening portions 130.

The base portion 610 may have a support portion 615. The supporting part 615 supports the circuit board 510 of the driving part 500. The support portion 615 may protrude from the base portion 610 in the direction of the protrusion 630. The height of the support portion 615 may be the same as the thickness of the heat dissipating pad 700. The circuit board 510 of the driving unit 500 can be fixed on the base unit 610 by the supporting unit 615. [

The base portion 610 may have a top surface on which the driving portion 500 is disposed and a bottom surface exposed to the outside. Here, the bottom surface is flat. If the lower surface is flat, there is an advantage that heat dissipation is effective.

The protrusion 630 may have a key 631. The plurality of keys 631 may be disposed on the upper surface of the protrusion 630. The key 631 is inserted into the hole 415 of the substrate 410 of the light source unit 400. The position and direction of the substrate 410 can be identified through the key 631. [

The projecting portion 630 may have a fastening hole 633. The fastening hole 633 may be disposed adjacent to the key 631. [ The fastening hole 633 is engaged with the fastening member inserted into the hole 415 of the substrate 410 of the light source unit 400.

The heat dissipating unit 600 may be formed of a metal material or a resin material having excellent heat dissipation efficiency, but is not limited thereto. For example, the material of the heat sink 600 may include at least one of aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), tin (Sn), and magnesium .

<Reflector 300, light source unit 400, and heat sink 600>

Referring to FIG. 6, a light source 400 is disposed on a heat sink 600, and a reflector 300 is disposed on a light source 400. Specifically, the substrate 410 of the light source unit 400 and the reflector 310 of the reflector 300 are disposed on the substrate 410 on the protrusion 630 of the heat sink 600. However, the present invention is not limited thereto, and the light source unit 400 and the reflector 300 may be disposed on the heat discharging body 600 together. Specifically, the substrate 410 of the light source unit 400 is disposed on the upper surface of the protrusion 630 of the heat sink 600, and the reflective portion 310 of the reflector 300 surrounds the substrate 410, 630).

The internal storage space defined by the housing 100 and the base portion 610 of the optical plate 200 and the heat discharging body 600 is limited. Therefore, when the light source unit and the driving unit are integrated, that is, the substrate of the light source unit and the circuit board of the driving unit are integrated, the position of the substrate is located at the lower end of the housing. Accordingly, the size and height of the reflector of the conventional lighting apparatus become large. Then, since the distance between the substrate and the optical plate is increased, the efficiency of light emitted from the optical plate is deteriorated.

However, since the light source unit 400 is separated from the driving unit 500 and the height of the protruding portion 630 of the heat discharger 600 can be freely changed, Can be positioned close to the plate (200). Further, there is an advantage that the reflecting surface 310a of the reflector 300 does not need to be composed of a plurality of surfaces and can be constituted by one reflecting surface 310a. In addition, since the angle a between the reflective surface 310a of the reflector 300 and the substrate 410 can be widened, the efficiency of light emitted from the optical plate 200 can be increased.

&Lt; Heat radiation pad (700) >

The lighting apparatus according to the embodiment may further include a heat radiation pad 700.

The heat dissipation pad 700 may be disposed between the heat dissipation body 600 and the driving unit 500. The heat radiating pad 700 may be disposed between the base portion 610 of the heat discharging body 600 and the circuit board 510 of the driving portion 500. The heat radiating pad 700 may be disposed on a part of the base portion 610. The heat dissipation pad 700 has a predetermined thickness and can quickly transmit heat from the circuit board 510 of the driver 500 to the base unit 610. Here, the heat-radiating pad 700 may be disposed only on a specific portion of the circuit board 510, which may be a heat-radiating component, for example, a plurality of components 520 disposed on the circuit board 510, Can be placed under the transformer.

The thickness of the heat dissipation pad 700 may be the same as the height of the support portion 615 of the heat dissipator 600. The circuit board 510 of the driving unit 500 may be disposed parallel to the upper surface of the base unit 610 by the heat dissipation pad 700 and the support unit 615.

The heat radiating pad 700 may have a groove 715. The fastening portion 130 of the housing 100 may be disposed in the groove 715. When the fastening portion 130 is inserted into the groove 715, the movement of the heat radiation pad 700 can be prevented and the placement direction and position of the heat radiation pad 700 can be identified.

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: Housing
200: Optical plate
300: reflector
400: light source part
500:
600: heat sink
700: heat-radiating pad

Claims (10)

A heat radiator;
A driver including a circuit board disposed on the heat radiator and a component disposed on the circuit board;
A light source unit disposed on the heat discharging body and receiving power from the driving unit to emit light;
A housing coupled to the heat discharging body and housing the driving unit and the light source unit; And
And a heat dissipation pad disposed between the circuit board of the driving unit and the heat dissipation member,
Wherein the heat dissipation pad is disposed on a part of the heat dissipation body,
The heat dissipator further includes a support portion disposed in a remaining portion except a portion of the heat dissipator,
Wherein the circuit board of the driving unit is disposed on the support member of the heat radiation pad and the heat radiation member. The method according to claim 1,
The heat dissipator has a fastening hole,
Wherein the housing has a fastening portion corresponding to the fastening hole of the heat discharging body,
By the engagement between the housing and the heat discharging body, the fastening portion of the housing fixes the circuit board of the driving portion,
Wherein the circuit board of the driving portion is disposed and fixed between the fastening portion of the housing and the heat radiation pad. 3. The method of claim 2,
And the fastening portion of the housing protrudes into the housing. 3. The method of claim 2,
And the fastening portion of the housing is engaged with the fastening member inserted into the fastening hole of the heat discharging body. 3. The method of claim 2,
Wherein the circuit board of the driving unit has a groove for inserting a fastening portion of the housing and identifying a coupling position and a direction of the circuit board. 3. The method of claim 2,
Wherein the heat radiating pad has a groove for inserting a fastening portion of the housing and identifying a coupling position and a direction of the circuit board. delete The method according to claim 1,
Wherein the heat discharger includes a base portion and a protrusion disposed on the base portion,
Wherein the circuit board of the driving portion is disposed on the base portion,
And the light source portion is disposed on the protrusion. The method according to claim 1,
A reflector housed in the housing and disposed on the light source; And
An optical plate housed in the housing and disposed on the reflector;
Further comprising: The method according to claim 1,
The housing has a key,
Wherein the circuit board and the heat radiator of the driving unit each have a keyway coupled with a key of the housing.

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