Source: https://patents.google.com/patent/KR101227527B1/en
Timestamp: 2020-06-06 11:17:59
Document Index: 509079409

Matched Legal Cases: ['art 160', 'art 160', 'arts 141', 'art 141', 'art 142', 'art 114', 'art 114']

KR101227527B1 - Lighting apparatus - Google Patents
KR101227527B1
KR101227527B1 KR1020110089475A KR20110089475A KR101227527B1 KR 101227527 B1 KR101227527 B1 KR 101227527B1 KR 1020110089475 A KR1020110089475 A KR 1020110089475A KR 20110089475 A KR20110089475 A KR 20110089475A KR 101227527 B1 KR101227527 B1 KR 101227527B1
KR1020110089475A
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2011-09-05 Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
2011-09-05 Priority to KR1020110089475A priority Critical patent/KR101227527B1/en
2013-01-31 Publication of KR101227527B1 publication Critical patent/KR101227527B1/en
The present invention relates to a lighting device, and more particularly to a lighting device that can emit light emitted from the LED light source to the omni-directional area of the bulb.
The present invention relates to a lighting device, and more particularly to a lighting device that can emit light radiated from the LED light source over all directions, and can reduce the heat transferred from the heat sink to the bulb.
On the other hand, the light emitting diode generates high heat during operation, and the efficiency of the lighting device is reduced if such heat is not dissipated through a heat sink.
In addition, when heat generated from the light emitting diode is transferred to another component through a heat sink, the component may be overheated or broken, and in the case of a bulb, deformation may occur.
In addition, the light emitting diode has a relatively small irradiation angle, which lowers light distribution characteristics, and has a limitation in emitting light in a wide irradiation area. In particular, a lighting device equipped with a light emitting diode has a strong straightness, and a small irradiation angle has a problem that can not emit a wide range by emitting light only directly below or in the vicinity of the ceiling, etc. It is realized with sufficient illuminance only in its vicinity, and does not provide sufficient illuminance in relatively distant spaces.
Therefore, since more lighting devices are required to maintain a large space at sufficient illuminance, a problem arises in that the installation cost increases.
The present invention is to solve the problem to provide a lighting device that can emit light emitted from the LED light source in a uniform amount of light over the omnidirectional area.
In addition, another object of the present invention is to provide an illumination device capable of illuminating a wider illumination space with light emitted from an LED light source.
In addition, the present invention is to solve the problem to provide a lighting device that can reduce the heat transferred from the heat sink to the bulb.
In order to solve the above problems, according to an aspect of the present invention, a heat sink comprising a mounting block having a top surface and a plurality of side surfaces and disposed on the heat sink, the central region is the top surface of the mounting block A light emitting module including a bulb surrounding the mounting block so as to correspond to the first block, and a first substrate disposed on the side of the mounting block and an LED light source mounted on the first substrate to irradiate light toward the side region of the bulb. And an electric component electrically connected to the light emitting module and the heat sink, and are inclined downward from the side surface of the mounting block so as not to interfere with light within a predetermined light distribution angle irradiated from the LED light source. A first reflection member having an inclined surface and disposed on the mounting block, the light emitted from the LED light source side of the bulb A lighting device is provided that includes a second reflecting member for reflecting to a region or a bottom region.
In addition, the inclined surface of the first reflecting member may be inclined downward by 120 ° to 140 ° based on the side surface of the mounting block.
In addition, the second reflecting member may include a cap part surrounding an upper portion of the mounting block and a reflecting part extending from an outer circumferential surface of the cap part.
In addition, the reflector may have a ring shape.
In addition, the reflector may be inclined upward from the side of the mounting block toward the central region of the bulb.
In addition, the bulb may include a first diffusion portion at the upper end and a second diffusion portion at the lower end, and the first diffusion portion and the second diffusion portion may have different curvatures.
In addition, the LED light source may be positioned to irradiate toward the boundary between the first diffusion portion and the second diffusion portion.
In addition, the LED light source may be positioned so that the light irradiation axis having the maximum amount of light passes through the boundary between the first diffusion portion and the second diffusion portion.
In addition, the diameter of the second diffusion portion may decrease linearly as it moves away from the LED light source.
The light emitting module may further include a second substrate disposed on an upper surface of the mounting block and provided with a connector electrically connected to the electric component.
In addition, the second reflecting member may include a cap part surrounding the connector and the second substrate and a reflecting part extending from an outer circumferential surface of the cap part.
In addition, any one of the second substrate and the first substrate may be provided with a protrusion, and the other may be provided with a groove into which the protrusion is inserted, and the protrusion and the groove may be electrically connected to each other.
In addition, the mounting block may have a through-hole for passing a cable for electrically connecting the connector and the electrical equipment.
In addition, the heat sink may be provided with a mounting portion in which the mounting block is provided at the upper end and a recess into which the first reflecting member is inserted, and an insertion portion in which the full length is accommodated at the lower end.
In addition, the first reflecting member may include a ring portion surrounding a portion or more of the mounting portion and an insertion groove portion provided on an outer circumferential surface of the ring portion and into which the bulb is inserted.
In addition, the first reflective member may be formed with an inclined surface in the circumferential direction of the upper end of the ring portion.
In addition, any one of the bulb and the insertion groove portion may be provided with a projection portion, the other one may be provided with a groove portion is inserted into the projection portion.
In addition, the first reflecting member may be fastened to the mounting portion through the ring portion.
In addition, the light emitting module may further include a thermally conductive pad disposed between the mounting block.
As described above, the lighting apparatus according to the embodiment of the present invention may emit light emitted from the LED light source with a uniform amount of light over the omni-directional area of the bulb.
In addition, the lighting device according to an embodiment of the present invention can illuminate a wider lighting space with light emitted from the LED light source.
In addition, the lighting apparatus according to an embodiment of the present invention can reduce the heat transferred from the heat sink to the bulb.
In addition, the lighting apparatus according to an embodiment of the present invention can reduce the number of parts, reduce the manufacturing cost, and can increase the mass production.
1 is a perspective view of a lighting apparatus according to an embodiment of the present invention.
3 is a perspective view of a state in which some of the components shown in FIG.
4 is a side view of a second reflecting member constituting a lighting device according to an embodiment of the present invention.
5 is a rear perspective view of a second reflective member constituting a lighting device according to an embodiment of the present invention.
Figure 6 is a side perspective view for explaining an operating state of the lighting device according to an embodiment of the present invention.
7 is a graph illustrating light distribution characteristics of a lighting apparatus according to an embodiment of the present invention.
1 is a perspective view of a lighting device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the lighting device according to an embodiment of the present invention, and FIG. 3 is a state in which some components shown in FIG. 2 are coupled to each other. Perspective view.
4 is a side view of the second reflective member constituting the lighting device according to an embodiment of the present invention, and FIG. 5 is a rear perspective view of the second reflective member constituting the lighting device according to an embodiment of the present invention. 6 is a side perspective view for explaining an operating state of a lighting device according to an embodiment of the present invention, and FIG. 7 is a graph for explaining light distribution characteristics of the lighting device according to an embodiment of the present invention.
The lighting device 1 according to an embodiment of the present invention includes a heat sink 110, a bulb 140, a first reflecting member 150, and a second reflecting member provided with a light emitting module 120 and a mounting block 115. 190.
In addition, the lighting device 100 includes an electric appliance 160, a power socket 180, and a housing 170.
In detail, the lighting device 100 is disposed on the heat sink 110 and the heat sink 110 including a mounting block 115 having an upper surface 116 and a plurality of side surfaces 117. Irradiating light toward the bulb 140 surrounding the mounting block 115 and the side region 140b of the bulb 140 so that the region 140a corresponds to the upper surface 116 of the mounting block 115. To this end, the light emitting module 120 and the heat including a first substrate 121 disposed on the side surface 117 of the mounting block 115 and an LED light source 122 mounted on the first substrate 121. Disposed on the sink 110 and downwardly directed from the side surface 117 of the mounting block 115 toward the heat sink 110 so as not to interfere with light within a predetermined light distribution angle emitted from the LED light source 122. Is disposed on the first reflecting member 150 and the mounting block 115 having a photograph inclined surface 152, irradiated from the LED light source 122 And wherein the a second reflecting member 190 for reflecting the side areas (140b) or the lower area (140c) of the bulb (140).
In addition, the lighting device 100 is mounted on the housing 170 and the housing 170 for receiving the electric part 160 and the electric part 160 electrically connected to the light emitting module 120 and the electric The power supply socket 180 is electrically connected to the book 160.
Hereinafter, each component of the lighting device 100 according to the present invention will be described with reference to the accompanying drawings.
The bulb 140 may have various shapes in consideration of design characteristics, and may have a function of diffusing light emitted from the light emitting module 120 or adjusting a direction of light emitted to the outside of the bulb 140. have. For example, when the bulb 140 acts as a diffusion member, light may be scattered or diffused, and thus the direction of light may be removed and the entire surface of the bulb 140 may be surface light source.
In addition, the bulb 140 has a central region 140a corresponding to the central axis C of the heat sink 110, a side region 140b extending from the central region 140a, and a lower end of the heat sink 110. The center region 140a, the side region 140b, and the bottom region 140c may have different curvatures. The bulb 40 may be provided with a mounting end 141 in the lower region 140c, and the mounting end 141 may be formed in a ring shape.
In the housing 170, an electric component 160 for converting commercial power into an input power of the light emitting module 120 may be disposed therein, and the housing 170 may include the heat sink 110 and the electrical component 160. ) To insulate. The housing 170 may be equipped with a power socket 180 to which commercial power is supplied. In addition, an insulating material may be filled in the space between the housing 170 and the electric component 160.
In addition, the housing 170 may be integrally formed with the heat sink 110, may be formed of a metal material to perform heat dissipation of the light emitting module 120, and may be separately configured from the heat sink 110 to heat the heat. It may be mounted to the sink 110. In particular, when the housing 170 and the heat sink 110 are separated from each other, the housing 170 may be inserted into an insertion part provided at the lower end of the heat sink 110 and may be connected to the light emitting module 120. It may be inserted up to the vicinity of the mounting block 115 to reduce the electrical connection length.
The electric component 60 may include a component such as a converter for converting a commercial power source into a DC power source and a transformer for adjusting a magnitude of a voltage.
In addition, the heat sink 110 is formed of a metal material, it is possible to quickly dissipate heat generated from the light emitting module 120, the heat sink 110 a plurality of heat dissipation fins to increase the contact area with the outside air 113 may be provided.
The light emitting module 120 has a top view type arranged to mainly irradiate toward the center region 140a of the bulb 140 and a side view (mainly arranged to irradiate the side region 140b of the bulb 140). side view) type.
The light emitting module 120 according to the present embodiment relates to a side view type.
The light emitting module 120 includes a first substrate 121 disposed on the side of the mounting block 115 and one or more LED light sources 122 mounted on the first substrate 121, and the mounting block 115. ) May have the shape of an N pillar having three to N sides (N> 3), and the light emitting module 120 may be provided in plurality so as to be mounted on each side of the mounting block 115. have.
The light emitting module 120 may be disposed on an upper surface of the mounting block 115 and may include a second substrate 123 having a connector 124 electrically connected to the electric component 160.
Here, one of the second substrate 123 and the first substrate 121 is provided with a projection (121a), the other is provided with a groove (unsigned) into which the projection 121a is inserted, the projection ( 121a) is electrically connected to the groove portion. 3 illustrates a case in which the protrusion 121a is provided on the first substrate 121, and a groove (unsigned) into which the protrusion 121a is inserted is provided on the second substrate 123, but is provided on the contrary. Of course it can.
Accordingly, power is supplied from the electrical component unit 160 to the connector 124, and the power is sequentially passed through the groove portion and the protrusion 121a of the second substrate 123, and then the LED light source 122 of the first substrate 121. Is supplied.
In addition, the mounting block 115 may have a through hole 118 for passing a cable (not shown) that electrically connects the connector 123 and the electric component 160 of the second substrate 124. .
In addition, the mounting block 115 may be formed of a metal material having high thermal conductivity in order to quickly transfer the heat generated from the light emitting module 120 to the heat sink 110, the mounting block 115 is the It may be integrally formed on the heat sink 110.
In addition, the lighting device 100 may further include a heat conduction pad P disposed between the mounting block 115 and the light emitting module 120.
Meanwhile, referring to FIGS. 6 and 7, a light flux of at least 5% is secured at a light distribution angle of 135 ° or more based on a central axis of the heat sink 110, and an average light beam deviation is obtained at a light distribution angle of 0 ° to 135 °. When implemented within 20%, omnidirectional light distribution requirements can be met.
However, the LED light source 122 constituting the light emitting module 120 has a strong linearity of light and has a relatively small light distribution angle (about 120 °). In the case of the side view type light emitting module 120, the light of some light distribution angle is It may not be emitted to the bottom region 140a of the bulb 140 and may be reflected by the first reflecting member 150 to be emitted to the central region 140a or the side region 140b of the bulb 140. In this case, the above-mentioned omnidirectional light distribution requirements cannot be satisfied.
Therefore, the light irradiated at a predetermined light distribution angle from the side view type light emitting module 120 is not emitted to the lower region 140c of the bulb 140 and the interference is not caused by the first reflecting member 150. The first reflective member 150 has an inclined surface 152 inclined downward by forming the heat sink 110 from the side surface 117 of the mounting block 115.
Here, the inclined surface 152 of the first reflective member 150 may be inclined downward by 120 ° to 140 ° based on the side surface 117 of the mounting block 115. This is in consideration of the light distribution angle (120 °) of the LED light source, the angle range in consideration of the separation distance of the first reflecting member 150 and the LED light source 122 and the size of the first reflecting member 150 and the like. Can be determined within.
5 and 7, the lighting device 100 according to the present embodiment uses the LED light source 122 through the side reflection type light emitting module 120 and the first reflective member 150 having the inclined surface 152. Since the light emitted from the light source 140 may be emitted to the side region 140b and the bottom region 140c of the bulb 140, the omnidirectional light distribution requirements may be satisfied.
Meanwhile, reference numeral C denotes a central axis of the bulb 140, C1 denotes a line extending from the side surface of the mounting block 115, and C2 extends from the inclined surface 152 of the first reflective member 150. Represents a line, and θ1 represents the inclination angle at which C2 is inclined relative to C1. Therefore, in the present embodiment, θ1 may be 120 to 140 °.
In addition, the second reflecting member 190 reflects the light emitted from the LED light source 122 to the side region 140b or the bottom region 140c of the bulb 140 to satisfy the omnidirectional light distribution requirements. Do this.
The second reflective member 190 may include a cap portion 191 surrounding the upper portion of the mounting block 115 and a reflecting portion 192 extending from an outer circumferential surface of the cap portion 191, wherein the reflecting portion ( 192 may be ring shaped. When the light emitting module 120 is radially disposed on each side surface 117 of the mounting block 115, the reflector 192 has a ring type, thereby emitting light emitted from each LED light source 122. The light may be reflected to the side region 140b or the bottom region 140c of the 140.
In addition, the second reflecting member 190 may have a fastening hole 194 for fastening to an upper portion of the mounting block 115, and the second reflecting member 190 has an upper portion of the mounting block 115. An accommodation groove 193 may be provided to enclose the housing.
In addition, the second reflecting member 190 has an upper portion of the mounting block 115 in a state where the receiving groove 193 surrounds the boundary between the second substrate 123 and the first substrate 121 and the connector 123. Since it is fastened to the surface 116, the lighting device 100 can have an excellent appearance quality.
In addition, the reflector 192 may be inclined upward from the side surface 117 of the mounting block 115 toward the central region 140a of the bulb 140, and C3 may be the second reflective member 190. Represents a line extending from the reflector 192, and θ2 represents the inclination angle in which C3 is inclined relative to C1. Therefore, in the present embodiment, θ2 may be 90 ° to 110 °.
As described above, the lighting device 100 according to the present embodiment includes the first reflecting member 150 and the first reflecting member 150 which are positioned under the LED light source 122 constituting the light emitting module 120 of the side view type. Light emitted from the LED light source 122 through the second reflecting member 190 located on the inclined surface 152 and the LED light source 122 of the side region 140b and the lower region of the bulb 140 Since it can emit evenly to 140c, it is possible to meet the omnidirectional light distribution requirements.
In addition, the light emitted from the LED light source through the inclined surface 152 of the first reflecting member 150 and the second reflecting member 190 and at the same time meets the omnidirectional light distribution requirements (side area of the bulb 140) Since it can emit evenly to the 140b) and the lower region 140c, it is possible to illuminate a wider lighting space than when emitted only to the central region (140a).
On the other hand, in order to improve the light distribution characteristics and / or scattering characteristics in the process of the light emitted from the LED light source 122 passes through the bulb 140, the bulb 140 and the first diffusion portion 141 of the upper end It may include a second diffusion unit 142 of the lower end, the first diffusion unit 141 and the second diffusion unit 142 may have a different curvature. For example, the diameter of the second diffusion unit 142 may decrease linearly as it moves away from the LED light source 122.
In addition, in order to increase scattering characteristics, the LED light source 122 may be located at the boundary portion B of the first and second diffusion parts 141 and 142. For example, the LED light source 122 is The light irradiation axis L1 having the maximum amount of light may be disposed to pass through a boundary between the first diffusion part 141 and the second diffusion part 142.
Up to now, the first reflective member 150 has been described with the inclined surface 152 in order to increase the omnidirectional light distribution characteristics, and a further function of the first reflective member 150 will be described below.
In addition, the heat sink 110 has a mounting portion 114 having a mounting block 115 for placing the light emitting module 20 at an upper end thereof and a recess for inserting the mounting end portion 141 of the bulb 140. It may have a (112), it may have an insertion portion (not shown) in which the housing 170 is inserted in the lower end. In addition, the recess 112 may be provided in a space between the mounting part 114 and the heat dissipation fin 113, and the mounting part 114 may be formed to protrude upward from the heat sink 110 than the heat dissipation fin 113. Can be.
On the other hand, the light emitting module 120 generates a lot of heat when the lighting device 100 operates, and the heat is emitted to the outside through the heat sink 110. Here, when the bulb 140 is mounted in direct contact with the heat sink 110, heat generated from the light emitting module 120 may be transferred to the bulb 140 through the heat sink 110. Deformation of the bulb 140 may occur due to high temperature.
In order to prevent the deformation of the bulb 140, in the lighting device 100 according to the present embodiment, the first reflecting member therebetween for reducing heat transferred from the heat sink 110 to the bulb 140. 150 may be disposed.
The first reflecting member 150 spaces the heat sink 110 and the bulb 140 so that the heat sink 110 and the bulb 140 do not directly contact each other.
The first reflective member 150 may have a structure that can be spaced apart from the heat sink 110 and the bulb 140, for example, the first reflective member 150 of the mounting portion 111 It may include a ring portion 151 surrounding a portion or more and an insertion groove portion 153 provided on an outer circumferential surface of the ring portion 151 and into which the bulb 140 is inserted.
At this time, the first reflective member 150 is formed with an inclined surface 152 along the circumferential direction of the upper end of the ring portion 151.
On the other hand, when the first reflecting member 150 is fastened to the heat sink 110 through the recess 112, the heat of the heat sink 110 by the fastening means made of a metal bulb along the fastening means Since it may be transmitted to the mounting end 141 of the 140, the first reflective member 150 may be fastened to the upper portion of the mounting portion 111.
In addition, any one of the bulb 140 and the insertion groove 153 may be provided with a projection (not shown), the other one may be provided with a groove (not shown) in which the projection is inserted, thereby the bulb 140 and the insertion groove 153 may be coupled in the inserted state without a separate fastening means such as a screw.
Specifically, a protrusion may be provided at any one of the mounting end 141 of the bulb 140 and the inner circumferential surface of the insertion groove 153, and a groove may be provided at the other end of the bulb 140.
Since the first reflecting member 150 has a structure that is directly coupled to the heat sink 110, the first reflecting member 150 may be formed of a material having excellent heat resistance, and may reduce heat transferred from the heat sink 110 to the bulb 140. For this reason, it is preferable to be formed of a material having a low thermal conductivity, and preferably formed of a material having a high reflectance so that light emitted from the light emitting module 120 can be reflected to the omnidirectional region of the bulb 140.
In addition, the upper end of the mounting portion 111 of the heat sink 110 may be provided with an inclined portion (114a) in the circumferential direction, the inclined portion (114a) is the inclined surface 152 of the first reflective member 150 May have the same inclination angle.
100: lighting device 110: heat sink
114: heat radiation fin 115: mounting block
120: light emitting module 121: first substrate
122: light source 140: bulb
150: first reflecting member 152: inclined surface
160: total length portion 170: housing
180: power socket 190: second reflective member
P: heat conduction pad
A heat sink comprising a mounting block having an upper surface and a plurality of side surfaces;
A bulb disposed on the heat sink and surrounding the mounting block such that a central region corresponds to an upper surface of the mounting block;
A light emitting module including a first substrate disposed on a side of the mounting block and an LED light source mounted on the first substrate to irradiate light toward the side region of the bulb;
An electrical unit electrically connected to the light emitting module;
A first reflecting member disposed on the heat sink and having an inclined surface inclined downward from the side of the mounting block toward the heat sink so as not to interfere with light within a predetermined light distribution angle irradiated from the LED light source; And
Is disposed above the mounting block, the lighting device including a second reflecting member for reflecting light emitted from the LED light source to the side region or the bottom region of the bulb.
The inclined surface of the first reflective member is characterized in that the inclined downward 120 ° to 140 ° with respect to the side of the mounting block.
And the second reflecting member includes a cap part surrounding an upper portion of the mounting block and a reflecting part extending from an outer circumferential surface of the cap part.
The reflector is a ring device, characterized in that the ring shape.
And the reflector is inclined upward from the side surface of the mounting block toward the central area of the bulb.
The bulb includes a first diffusion part of the upper end and a second diffusion part of the lower end,
And the first and second diffusion units have different curvatures.
And the LED light source is positioned to irradiate toward the boundary of the first diffusion portion and the second diffusion portion.
And the LED light source is positioned such that a light irradiation axis having a maximum amount of light passes through a boundary between the first diffusion portion and the second diffusion portion.
The second diffuser is a lighting device, characterized in that the diameter decreases linearly away from the LED light source.
The light emitting module is disposed on the upper surface of the mounting block, and further comprising a second substrate provided with a connector that is electrically connected to the electrical component.
And the second reflecting member includes a cap portion surrounding the connector and the second substrate and a reflecting portion extending from an outer circumferential surface of the cap portion.
One of the second substrate and the first substrate is provided with a projection, the other is provided with a groove portion is inserted into the projection,
Illumination device, characterized in that the projection and the groove is electrically connected.
The mounting block has a through hole for passing through the cable for electrically connecting the connector and the electrical equipment.
The heat sink is provided with a mounting portion in which the mounting block is provided at the upper end and a recess into which the first reflecting member is inserted, and an insertion portion in which the electrical component is accommodated in the lower end.
The first reflecting member includes a ring portion surrounding a portion or more of the mounting portion, and an illumination groove provided on an outer circumferential surface of the ring portion and into which a bulb is inserted.
The first reflecting member, characterized in that the inclined surface formed in the circumferential direction of the upper end of the ring portion.
Any one of the bulb and the insertion groove portion is provided with a projection portion, the other is a lighting device characterized in that the groove portion is provided with the projection portion is provided.
And the first reflecting member is fastened to the mounting portion through the ring portion.
And a heat conduction pad disposed between the light emitting module and the mounting block.
KR1020110089475A 2011-09-05 2011-09-05 Lighting apparatus KR101227527B1 (en)
KR1020110089475A KR101227527B1 (en) 2011-09-05 2011-09-05 Lighting apparatus
US13/421,243 US8833977B2 (en) 2011-09-05 2012-03-15 Lighting apparatus
KR101227527B1 true KR101227527B1 (en) 2013-01-31
ID=47753068
US (1) US8833977B2 (en)
KR (1) KR101227527B1 (en)
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KR101349843B1 (en) * 2012-05-17 2014-01-10 엘지전자 주식회사 Lighting apparatus
TW201425809A (en) * 2012-12-28 2014-07-01 Genesis Photonics Inc LED light source structure and illumination device using the LED light source structure
CN207831017U (en) * 2018-02-10 2018-09-07 广景视睿科技（深圳）有限公司 A kind of LED structure and optical projection system
KR20100037354A (en) * 2008-10-01 2010-04-09 주식회사 아모럭스 Radiator of helical type and led lighting apparatus of bulb type using the same
2011-09-05 KR KR1020110089475A patent/KR101227527B1/en active IP Right Grant
2012-03-15 US US13/421,243 patent/US8833977B2/en active Active
US20130058098A1 (en) 2013-03-07
US8833977B2 (en) 2014-09-16
TWI468621B (en) 2015-01-11 Illumination device and assembling method thereof
US8210735B2 (en) 2012-07-03 Light emitting diode bulb