KR20130017482A - Lighting device - Google Patents

Abstract

PURPOSE: A lighting device is provided to replace the existing incandescent lamp without improvements in the mechanical connecting structure or assembly, since the lighting device is composed of the structure capable of replacing the existing incandescent lamp. CONSTITUTION: A heat radiation body(140) comprises a planar part. The planar part comprises a first base part and a second base part. A light source module part comprises a substrate and a light emitting element arranged on the substrate. A cover part(110) protects the light source module part and the heat radiation body. The cover part comprises an upper cover part and a lower cover part. The cover part comprises an optical part reflecting light from the light source module part.

Description

LIGHTING DEVICE

Embodiments relate to a lighting device.

Light emitting diodes (LEDs) are a type of semiconductor device that converts electrical energy into light. Light emitting diodes have the advantages of low power consumption, semi-permanent life, fast response speed, safety and environmental friendliness compared to conventional light sources such as fluorescent 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 .

Japanese Laid-Open Patent No. 2006-313718 (published: November 16, 2006)

The embodiment provides a lighting device that can replace the conventional incandescent bulb.

In addition, the embodiment provides a lighting device capable of rear light distribution.

Illumination apparatus according to the embodiment, the heat sink having a flat portion; A light source module unit having a light source unit disposed on the flat portion; And a cover part coupled to the heat sink, wherein the cover part has an optical part that reflects light from the light source part and is disposed on an inner surface of the cover part and has a conical shape.

In one embodiment, a lighting apparatus includes: a light source module unit having a substrate and a light emitting device disposed on the substrate; A heat sink on which the substrate is disposed; And a cover part coupled to the heat radiator, wherein the cover part is disposed between an inner surface of the cover part and the light source module part and has an optical part having a funnel or trumpet shape.

In one embodiment, a lighting apparatus includes: a light source module unit having a substrate and a light emitting device disposed on the substrate; A heat sink disposed under the substrate; And a cover part disposed on the substrate, wherein the cover part includes an upper cover part and a lower cover part, and the cover part has an optical surface connected between the upper cover part and the lower cover part, and the optical surface Has an opening through which the light from the light emitting element is reflected toward the lower cover portion, and the light from the light emitting element penetrates.

Using the lighting apparatus according to the embodiment, there is an advantage that can replace the conventional incandescent bulb.

In addition, there is an advantage that rear light distribution is possible.

1 is a perspective view of a lighting apparatus according to an embodiment.
FIG. 2 is an exploded perspective view of the lighting apparatus shown in FIG. 1. FIG.
3 is a cross-sectional view of the lighting apparatus shown in FIG. 1.
4 is a cross-sectional view of the cover unit shown in FIG.
FIG. 5 is a sectional perspective view of a modification of the cover part shown in FIG. 1. FIG.
6 is a cross-sectional view of the cover unit shown in FIG.
7 is a cross-sectional perspective view for explaining the coupling of the cover portion and the heat sink shown in FIG.
FIG. 8 is a perspective view of a modification of the heat sink shown in FIG. 2. FIG.
9 is an exploded perspective view for explaining a holder coupled to the inner case 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. In addition, the size of each component does not necessarily 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 directly 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 of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of a lighting apparatus according to an embodiment, FIG. 2 is an exploded perspective view of the lighting apparatus illustrated in FIG. 1, and FIG. 3 is a cross-sectional view of the lighting apparatus illustrated in FIG. 1.

1 to 3, the lighting device 100 includes a cover 110, a light source module 130, a heat sink 140, a power controller 150, an inner case 160, and a socket 170. ).

The cover 110 protects the light source module 130 together with the radiator 140. The cover 110 is connected to the heat sink 140 and reflects, transmits or refracts the light generated from the light source module 130. In particular, the cover 110 may send the light generated from the light source module 130 to the rear of the lighting device 100 as well as the front.

The radiator 140 is for discharging heat generated from the light source module 130 when the lighting apparatus 100 is driven. The radiator 140 may improve heat dissipation efficiency through surface contact with the light source module 130. Here, the radiator 140 and the light source module 130 may be coupled by an adhesive, but may preferably be in surface contact with each other using a structure such as a screw.

The inner case 160 accommodates the power control unit 150 therein and is housed inside the radiator 160.

Hereinafter, the lighting device 100 according to the embodiment will be described in detail with reference to each component.

<Cover part>

The outer surface of the cover unit 110 has a bulb shape, and the inner surface of the cover unit 110 has an optical unit for rear light distribution. This will be described with reference to FIGS. 4 to 6.

4 is a cross-sectional view of the cover unit 110 shown in FIG.

3 to 4, the inner surface of the cover unit 110 has an optical unit 115.

The optical unit 115 may be integral with the inner surface of the cover 110, and may be connected to the inner surface of the cover 110 using an adhesive or the like.

The optical unit 115 may have a shape protruding outward from the inner surface of the cover 110. Specifically, the optical unit 115 may have a shape protruding in the direction in which the light source module 130 is disposed at the uppermost end of the inner surface of the cover 110.

The optical unit 115 may have a conical shape. In the present specification, the term “conical shape” includes not only geometrically perfect cones, but also shapes in which the conical surfaces of the bottom and cone surfaces constituting the cones are curved to the outside or the inside of the cone. In FIG. 4, the conical surface of the optical unit 115, that is, the optical surface is illustrated as being curved inside the optical unit 115.

The optical unit 115 may not only reflect light from the light source module unit 130 but also transmit some of the light from the light source module unit 130. That is, the optical unit 115 may simultaneously perform reflection and transmission of light.

The optical unit 115 reflects the light emitted from the light source module unit 130 toward the inner surface of the cover unit 110 toward the end of the cover unit 110. Therefore, the lighting device 100 according to the embodiment having the optical unit 115 has an advantage that the rear light distribution as well as the front light distribution.

5 to 6, a modification of the cover part illustrated in FIG. 1 will be described.

5 is a cross-sectional perspective view of a modification of the cover part shown in FIG. 1, and FIG. 6 is a cross-sectional view of the cover part shown in FIG. 5.

Referring to FIG. 5, the cover part 110 ′ has an optical part 115 ′.

The optical unit 115 ′ may have a funnel or trumpet shape. In this specification, the term "funnel or trumpet shape" means a shape having a diameter different from each of the two openings in a cylinder having an upper opening and a lower opening.

The optical unit 115 'is disposed between the cover 110' and the light source module 130 shown in FIG. One side of the optical unit 115 ′ may be connected to the inner surface of the cover unit 110 ′ and disposed between the cover unit 110 ′ and the light source module 130.

Specifically, the optical unit 115 'may include an upper opening 115'-1, a lower opening 115'-2, and an optical surface 115'-3, as shown in FIG. . In addition, the cover part 110 'may include an upper cover part 110'-1 and a lower cover part 110'-2.

The optical surface 115'-3 is connected between the upper cover portion 110'-1 and the lower cover portion 110'-2.

The sizes of the upper opening 115'-1 and the lower opening 115'-2 are different. Specifically, the upper opening 115'-1 is larger in diameter than the lower opening 115'-2. Some of the light emitted from the light source module 130 shown in FIG. 2 passes through the lower opening 115'-2 and the upper opening 115'-1 to the inner surface of the cover 110 ', The other part is reflected by the optical surface 115'-3 and proceeds to the lower cover part 110'-2.

Here, the optical surface 115 ′ -3 may not only reflect light from the light source module 130 shown in FIG. 2 but may also transmit a portion thereof. That is, some of the light incident from the light source module 130 may be reflected to cover the rear light distribution of the lighting apparatus according to the embodiment, and some of the light may be transmitted to cover the front light distribution of the lighting apparatus according to the embodiment. .

The inner surfaces of the cover parts 110 and 110 ′ illustrated in FIGS. 1 and 5 may be coated with milky paint. The paint may include a diffusing agent to allow light passing through the cover parts 110 and 110 ′ to diffuse from the inner surface of the cover parts 110 and 110 ′.

1 and 5, the material of the cover portion 110 'may be glass, but there is a weak problem in weight or external impact, such as plastic, polypropylene (PP), polyethylene (PE), etc. It is preferable. More preferably, light diffusion polycarbonate (PC) or the like having good light resistance, heat resistance, and impact strength properties may be used.

The inner surface roughness of the cover parts 110 and 110 'shown in FIGS. 1 and 5 is larger than the outer surface roughness of the cover parts 110 and 110'. When the light generated by the light source module 130 is irradiated to the inner surface of the cover parts 110 and 110 'and emitted to the outside, the light irradiated to the inner surface of the cover parts 110 and 110' is sufficiently scattered and diffused to the outside. To release. Therefore, the light emission characteristic is improved.

The cover parts 110 and 110 ′ illustrated in FIGS. 1 and 5 may be formed through blow molding.

The cover 110 is coupled to the heat sink 140. The cover part 110 and the heat sink 140 may be coupled by inserting the end of the cover part 110 into the groove 142 of the heat sink 140 shown in FIG. 3. Here, another example of the coupling of the cover unit 110 and the heat sink 140 will be described with reference to FIG. 5.

FIG. 7 is a cross-sectional perspective view illustrating the coupling between the cover part and the heat sink shown in FIG. 1.

Referring to FIG. 7, the heat sink 140 has a groove 142. The groove 142 is formed between the first base portion 141a and the guide portion 143 of the heat sink 140. The guide part 143 of the heat sink 140 has the accommodating part 143-1. On the other hand, the cover 110 has a locking step 111. The locking jaw 111 is disposed at the end of the cover 110.

When the cover unit 110 and the radiator 140 are coupled, the end of the cover unit 110 is inserted into the groove 142 of the radiator 140. At this time, the locking step 111 of the cover 110 is inserted into the receiving portion (143-1) of the guide portion 143 of the radiator (140).

By the locking step 111 of the cover 110 and the receiving portion 143-1 of the guide 143, the separation of the cover 110 from the heat radiator 140 is limited, and the cover 110 ) And the coupling force between the heat sink 140 is increased. In addition, the coupling between the cover 110 and the heat sink 140 may be added.

The cover unit 110 may have grooves 110a formed at both side ends of the locking step 111. By the groove 110a, the end portion of the cover portion 110 has a predetermined uneven shape. The protrusion 141a-1 of the radiator 140 is inserted into the groove 110a of the cover 110. By the groove 110a of the cover 110 and the protrusion 141a-1 of the heat sink 140, after the cover 110 is coupled with the heat sink 140, the rotation of the cover 110 is limited. do.

<Light source module part>

The light source module 130 includes a substrate 131 and a light source unit 133 disposed on the substrate 131.

The substrate 131 has a rectangular shape, but is not limited thereto and may have various shapes. For example, it may have a circular or polygonal shape.

The substrate 131 may be fixed to the radiator 140 through a screw.

The substrate 131 may have a via hole v. When the plurality of substrates 131 are disposed on a specific surface such as one surface of the heat sink 140, the via hole v serves as a connection path of a wire or a connector for electrically connecting the plurality of substrates 131. In addition, the via hole v is electrically connected to the electrode pin 150a of the power control unit 150.

The substrate 131 may be a circuit pattern printed on an insulator, and for example, a general printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or the like may be used. It may include. In addition, it is possible to use a Chips On Board (COB) type that can directly bond the LED chip unpacked on the printed circuit board. In addition, the substrate 131 may be formed of a material that reflects light efficiently, or the surface may be formed of a color that reflects light efficiently, for example, white, silver, or the like.

The light source unit 133 may include a light emitting device and a lens surrounding the light emitting device.

A plurality of light emitting devices may be disposed on one surface of the substrate 131, and the light emitting devices may be light emitting diode chips emitting red, green, or blue light, or light emitting diode chips emitting UV.

The light emitting diode may be a horizontal type or a vertical type, and the light emitting diode may emit blue, red, yellow, or green.

The lens is disposed on the substrate 131 to cover the light emitting element. The lens adjusts the directing angle of the light emitted from the light emitting element or the direction of the light. At this time, the lens is hemispherical type and is filled with a translucent resin such as a silicone resin or an epoxy resin so that there is no empty space therein. The light transmitting resin may include a phosphor dispersed wholly or partially.

In the case where the light emitting device is a blue light emitting diode, phosphors included in the light-transmitting resin of the lens include garnet-based (YAG, TAG), silicate-based, nitride-based, and oxynitride-based compounds. It may include at least any one of.

Natural light (white light) can be realized by including only a yellow phosphor in the translucent resin. However, a green phosphor or a red phosphor may be further included to improve the color rendering index and reduce the color temperature. In addition, when various kinds of phosphors are mixed in the light-transmissive resin, the addition ratio according to the color of the phosphor may use a green phosphor more than a red phosphor and a yellow phosphor more than a green 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.

In addition to mixing various kinds of phosphors in the light-transmissive resin, a layer having a red phosphor, a layer having a green phosphor, and a layer having a yellow phosphor may be separately divided.

<Heat radiator>

The heat sink 140 has a flat portion 141 having a flat one surface. The flat part 141 has a first base part 141a and a second base part 141b. The first and second base portions 141a and 141b have flat one surfaces.

Referring to FIG. 7, the first base portion 141a has at least one protrusion 141a-1. The protrusion 141a-1 protrudes from the outer circumference of the first base 141a in the direction of the guide part 143. Here, the protrusion 141a-1 may be connected to the guide part 143. That is, the protrusion 141a-1 may connect the first base 141a and the guide 143.

The protrusion 141a-1 is accommodated in the groove 110a of the cover 110. When the protrusion 141a-1 is accommodated in the groove 110a of the cover 110, the cover 110 may not rotate while being coupled with the heat sink 140.

The second base portion 141b has a shape protruding from the first base portion 141a toward the cover portion 110 side. The light source module 130 is disposed on the second base 141b. The second base part 141b has a seating part 141b-1 in which the light source module 130 is disposed. The seating part 141b-1 may correspond to the number of the light source module 130. When there are a plurality of seating portions 141b-1, some of the seating portions 141b-1 may be connected to each other.

The heat sink 140 has a guide part 143. The guide part 143 is spaced apart by a predetermined interval along the outer circumference of the base surface 141a. A groove 142 into which the cover part 110 is inserted is disposed between the guide part 143 and the base surface 141a. The guide part 143 may have a shape extending substantially in the vertical direction of the base surface 141a.

Referring to FIG. 7, the guide part 143 of the heat sink 140 may have a receiving part 143-1. The catching jaw 111 of the cover 110 may be inserted into the accommodation portion 143-1. Separation of the cover 110 and the radiator 140 is restricted by the accommodation portion 143-1 and the locking step 111.

The radiator 140 may include a first cylindrical portion 145 and a second cylindrical portion 147 extending from the first cylindrical portion 145 and smaller in diameter than the first cylindrical portion 145.

The height of the first cylindrical portion 145 may vary depending on the overall length of the power control unit 150.

The first cylindrical portion 145 has a plurality of pins 149 on the surface. The plurality of pins 149 are disposed radially along the surface of the first cylindrical portion 145. The plurality of fins 149 may improve the heat dissipation efficiency by increasing the surface area of the first cylindrical portion 145.

The pin 149 may also be disposed on the surface of the second cylindrical portion 147. That is, the pin 149 may extend from the surface of the first cylindrical portion 145 to the surface of the second cylindrical portion 147.

The radiator 140 has an accommodating groove for accommodating the power control unit 150 and the inner case 160. The receiving groove may be disposed at a position corresponding to the flat part 141 on the heat sink 140. The storage groove may be a groove deeply dug into the inside of the heat sink 140 on the surface of the heat sink 140.

The radiator 140 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 140 may include at least one of aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), and tin (Sn).

Although not shown in the drawing, a heat sink may be disposed between the light source module 130 and the heat sink 140. The heat sink may be formed of a heat conductive silicon pad or a heat conductive tape having excellent thermal conductivity, and may effectively transfer heat generated by the light source module 130 to the heat sink 140.

8 is a perspective view of a modification of the heat sink shown in FIG. 2.

The heat sink 140 ′ shown in FIG. 8 may also have a flat portion 141 ′. The flat portion 141 'may include a first base portion 141a' and a second base portion 141b '.

The second base portion 141b ′ may have a flat surface on which the substrate 131 of the light source module 130 shown in FIG. 2 may be disposed. The flat one surface may be a circular surface. Here, the second base portion 141b 'may have a seating portion 141b-1 shown in FIG. 2.

The first base portion 141a 'may be connected to the second base portion 141b' and may have an inclined surface having a predetermined slope with respect to the flat one surface of the second base portion 141b '. Specifically, the first base portion 141a 'surrounds the second base portion 141b', and the inclined surface is inclined downward based on one flat surface of the second base portion 141b '. An angle between the inclined surface and the flat one surface may be an acute angle.

If the first base portion 141a 'is disposed to be inclined at a predetermined angle with respect to the second base portion 141b', there may be an advantage in back light distribution.

The first base portion 141a ′ may have the groove 142 illustrated in FIG. 3. The first base part 141a 'may be coupled to the cover part 110 shown in FIG. 3 through the groove.

The heat sink 140 ′ shown in FIG. 8 may have a plurality of fins 149 ′. The fin 149 ′ may be due to a plurality of grooves formed on the outer surface of the heat sink 140 ′, or may protrude outward from the outer surface of the heat sink 140 ′ as shown in FIG. 2.

<Power control unit>

The power control unit 150 may include a support substrate 151 and a plurality of components 153 mounted on the support substrate 151. The plurality of components 153 may include, for example, a DC converter for converting AC power provided from an external power source into DC power, a driving chip for controlling driving of the light source module 130, and a light source module 130. An electrostatic discharge (ESD) protection element may be included, but is not limited thereto.

The power control unit 150 may include an electrode pin 150a protruding from the support substrate 151. The electrode fin 150a penetrates through the second base portion 141b of the heat sink 140 and is electrically connected to the via hole v of the light source module 130. Through the electrode pins 150a, the light source module 130 may receive power from the power control unit 150.

<Inner case>

The inner case 160 may include an accommodating part 161 and a connecting part 163.

The accommodating part 161 is accommodated in the accommodating groove of the heat sink 140. In addition, the accommodating part 161 accommodates the power control part 140 therein.

The accommodating part 161 may have a hollow cylindrical shape.

The inner surface of the accommodating part 161 may have a fastening hole 160a into which a screw is inserted.

The accommodating part 161 may be inserted into the accommodating groove of the heat sink 140 to prevent electrical short between the power control unit 150 and the heat sink 140 to improve the breakdown voltage of the lighting device 100 according to the embodiment. Can be.

The connection part 163 is connected to the socket part 170. The connection part 163 may have a shape inserted into the socket part 170.

The inner case 160 may be formed of a material having excellent insulation and durability, and for example, may be formed of a resin material.

The inner case 160 may have a holder. This will be described with reference to FIG. 9.

FIG. 9 is an exploded perspective view illustrating the holder coupled to the inner case illustrated in FIG. 2.

2 and 9, the holder 165 is coupled to the inner case 160 to seal the power control unit 150 together with the inner case 160. This is to insulate the power control unit 150 and the radiator 140.

The holder 165 may have a protrusion 165a through which the electrode pin 150a of the power control unit 150 penetrates and electrically insulates the radiator 140 and the electrode pin 150a.

The holder 165 may have a hole 165b through which a screw passes for coupling with the inner case 160. The hole 165b corresponds to the fastening hole 160a of the inner case 160.

<Socket part>

The socket 170 is coupled to the connection 163 of the inner case 160 and electrically connected to an external power source.

<Mechanism and electrical connection structure of power control unit and inner case>

The power control unit 150 may be disposed in the accommodation groove of the heat sink 140.

The support substrate 151 of the power control unit 150 may be placed upright in a direction perpendicular to one surface of the substrate 131 in order to smooth air flow in the inner case 160. Compared to the case in which the support substrate 151 is disposed in a horizontal direction with respect to one surface of the substrate 131, air flow may occur due to convection in up and down directions inside the inner case 160. The heat radiation efficiency of the lighting device 100 according to the embodiment may be improved.

The support substrate 151 may be disposed in the inner case 160 in a direction perpendicular to the longitudinal direction of the inner case 160, but is not limited thereto.

The power control unit 150 is electrically connected to the socket 170 by the wiring 150b, and is electrically connected to the light source module 130 by the electrode pin 150a. In detail, the wiring 150b may be connected to the socket 170 to receive power from an external power source. In addition, the electrode pin 150a may be electrically connected to the light source module 130 through the second base part 141b of the heat sink 140.

As such, since the lighting device 100 according to the embodiment is structurally configured to replace the conventional conventional arrangement bulb, the conventional arrangement for conventional arrangement bulb without improvement of the mechanical connection structure or assembly according to the new lighting device. There is an advantage to using equipment.

Although the above description has been made with reference to the embodiments, these are only examples and are not intended to limit the present invention, and those of ordinary skill in the art to which the present invention pertains should not be exemplified above without departing from the essential characteristics of the present embodiments. It will be appreciated that many variations 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.

110: cover part
130: light source module
140: heat sink
150: power control unit
160: inner case
170: socket portion

Claims (9)

A heat sink having a flat portion;
A light source module unit having a light source unit disposed on the flat portion; And
And a cover unit coupled to the radiator.
And the cover part has an optical part that reflects light from the light source part and is disposed on an inner surface of the cover part and has a conical shape. The method of claim 1,
And the optical unit transmits a part of the light. 3. The method according to claim 1 or 2,
The flat portion includes a first base portion and a second base portion,
The second base portion protrudes in the direction of the cover portion from the first base portion,
The lighting unit is disposed on the second base portion. The method of claim 3, wherein
The second base portion has a flat one surface on which the light source portion is disposed,
The first base portion is a lighting device having an inclined surface inclined at a predetermined angle with respect to the flat one surface. The method of claim 3, wherein
The cover part has a locking jaw and a groove,
The heat sink has a groove into which the cover portion is inserted and an accommodation portion in which the locking jaw of the cover portion is accommodated.
And the first base portion has a protrusion inserted into a groove of the cover portion. A light source module unit having a substrate and a light emitting element disposed on the substrate;
A heat sink on which the substrate is disposed; And
And a cover unit coupled to the radiator.
And the cover part is disposed between an inner surface of the cover part and the light source module part and has an optical part having a funnel or trumpet shape. A light source module unit having a substrate and a light emitting element disposed on the substrate;
A heat sink disposed under the substrate; And
A cover part disposed on the substrate;
The cover part includes an upper cover part and a lower cover part,
The cover portion has an optical surface connected between the upper cover portion and the lower cover portion,
And the optical surface has an opening through which light from the light emitting element reflects toward the lower cover portion, and through which light from the light emitting element passes. The method according to claim 6 or 7,
The heat sink has a flat portion and a guide portion and a groove formed between the flat portion and the guide portion and the cover portion is inserted therein,
The cover part has a locking jaw and a groove,
The flat portion has a protrusion inserted into the groove of the cover portion,
The guide unit has a lighting unit that accommodates the engaging jaw of the cover portion. The method according to any one of claims 1, 6 and 7,
A power control unit accommodated in the receiving groove of the heat sink;
An inner case accommodating the power control unit therein and inserted into an accommodation groove of the heat sink; And
A holder coupled to the inner case and sealing the power control unit together with the inner case;
&Lt; / RTI &gt;

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