CN202769377U - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
CN202769377U
CN202769377U CN2012204495705U CN201220449570U CN202769377U CN 202769377 U CN202769377 U CN 202769377U CN 2012204495705 U CN2012204495705 U CN 2012204495705U CN 201220449570 U CN201220449570 U CN 201220449570U CN 202769377 U CN202769377 U CN 202769377U
Authority
CN
China
Prior art keywords
light source
radiator
lighting device
radiating seat
described light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012204495705U
Other languages
Chinese (zh)
Inventor
薛信燊
全宗丰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN ZHONGMING SEMICONDUCTOR LIGHTING CO Ltd
Original Assignee
SHENZHEN ZHONGMING SEMICONDUCTOR LIGHTING CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN ZHONGMING SEMICONDUCTOR LIGHTING CO Ltd filed Critical SHENZHEN ZHONGMING SEMICONDUCTOR LIGHTING CO Ltd
Priority to CN2012204495705U priority Critical patent/CN202769377U/en
Priority to PCT/CN2013/072155 priority patent/WO2014036816A1/en
Application granted granted Critical
Publication of CN202769377U publication Critical patent/CN202769377U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/233—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/15—Thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The utility model is applied to the technical field of lighting, and provides a lighting device which comprises a light source and a driving power supply for providing electricity for the light source, wherein the light source is installed on a light source radiator isolated from the a power supply radiator. According to the lighting device, the light source is installed on the light source radiator isolated from the power supply radiator, so radiation of the light source and radiation of the driving power supply are separated and independent and do not affect each other mutually, radiation effects are good, service life of the light source and service life of the driving power supply are respectively guaranteed, and prolonging of service life of the whole lighting device is benefited. Therefore, the lighting device can be applied to various light source products or lighting fixture products, such as halogen lamps, electric discharge lamps, fluorescent lamps, car lights, high pressure sodium lamps, solid semiconductor lighting lamps (light emitting diode/organic light emitting diode) (LED/OLED), reflector lamps and light tubes, needing independent power supply devices.

Description

Lighting device
Technical field
The utility model belongs to lighting technical field, relates in particular to a kind of lighting device.
Background technology
At present, only have a radiator in the commercially available various lighting devices, light source and driving power all dispel the heat by this radiator.Although so be beneficial to assembling, radiating effect is not good.
The utility model content
The purpose of the utility model embodiment is to provide a kind of lighting device, is intended to solve the existing poor problem of lighting device radiating effect.
The utility model embodiment is achieved in that a kind of lighting device, comprises light source and is the driving power of described light source power supply, and described light source is installed on the light source radiator with the isolation of power-supply radiator heat.
The utility model embodiment is installed on light source the light source radiator of isolating with power-supply radiator heat, thereby light source and driving power radiation separation are opened, both dispel the heat relatively independent, no longer influence each other, excellent in heat dissipation effect, guarantee the service life of light source and driving power, be beneficial to the service life that prolongs whole lighting device.Simultaneously, this illuminator structure is simple, is easy to assembling.Thereby the utility model embodiment can be used on the various light source products or light fixture product that need independent power supply device, such as Halogen lamp LED, discharge lamp, fluorescent lamp, car light, high-pressure mercury lamp, solid-state semiconductor illuminating lamp (LED/OLED), shot-light, fluorescent tube etc.
Description of drawings
Fig. 1 is the stereogram of the lighting device that provides of the utility model embodiment one;
Fig. 2 is the cutaway view of the lighting device that provides of the utility model embodiment one;
Fig. 3 is the exploded view of the lighting device that provides of the utility model embodiment one;
Fig. 4 is the stereogram of the lighting device that provides of the utility model embodiment two;
Fig. 5 is the stereogram of the lighting device that provides of the utility model embodiment three;
Fig. 6 is the stereogram of the lighting device that provides of the utility model embodiment four;
Fig. 7 is the cutaway view of the lighting device that provides of the utility model embodiment four;
Fig. 8 is the exploded view of the lighting device that provides of the utility model embodiment four;
Fig. 9 is the stereogram of the lighting device that provides of the utility model embodiment five;
Figure 10 is the cutaway view of the lighting device that provides of the utility model embodiment five;
Figure 11 is the exploded view of the lighting device that provides of the utility model embodiment five;
Figure 12 is the stereogram of the lighting device that provides of the utility model embodiment six;
Figure 13 is the cutaway view of the lighting device that provides of the utility model embodiment six;
Figure 14 is the exploded view of the lighting device that provides of the utility model embodiment six.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model embodiment is installed on light source the light source radiator of isolating with power-supply radiator heat, thereby light source and driving power radiation separation are opened, both dispel the heat relatively independent, no longer influence each other, excellent in heat dissipation effect, guarantee respectively the service life of light source and driving power, be beneficial to the service life that prolongs whole lighting device.Thereby the utility model embodiment can be used on the various light source products or light fixture product that need independent power supply device, such as Halogen lamp LED, discharge lamp, fluorescent lamp, car light, high-pressure mercury lamp, solid-state semiconductor illuminating lamp (LED/OLED), shot-light, fluorescent tube etc.
The below is described in detail realization of the present utility model as an example of the LED bulb lamp example.
Embodiment one
Shown in Fig. 1 ~ 3, the lighting device that the utility model embodiment provides comprises light source 1 and is the driving power 2 of described light source 1 power supply, the light source radiators 12 that described light source 1 is installed on and power-supply radiator 21 heat are isolated.Light source 1 and driving power 2 radiation separations are opened, and both dispel the heat relatively independent, no longer influence each other, and excellent in heat dissipation effect guarantees respectively service life of light source 1 and driving power 2 to be beneficial to the service life that prolongs whole lighting device.
Usually, described power-supply radiator 21 tops are established a plurality of and heat insulation buckles 22 radiating seat 6 Joints, the gap 23 that 22 formation of adjacent heat insulation buckle are passed through for air stream.Air stream will be taken away the heat that is passed to power-supply radiator 21 and radiating seat 6 fast like this, dispel the heat very fast, timely.
12 of radiating seat 6 described in the utility model embodiment and light source radiators are established diffuser 15, and described light source radiator 12 links to each other with light source 1 by heating column 13.The heat that described light source 1 produces reaches light source radiator 12 via heating column 13, then is released into surrounding air, shown in Fig. 1 ~ 3.So design makes light source radiator 12 away from power-supply radiator 21, and radiating effect is very good separately.
For promoting efficiency of assembling, make the wire 7 that connects described driving power 2 and light source 1 pass radiating seat 6 and insulating trip 8, described insulating trip 8 makes driving power 2 and the isolation of extraneous conductor electricity.Described power-supply radiator 21 has a cavity 9 that supplies driving power 2 and insulating trip 8 to put into successively.In addition, described power-supply radiator 21 spins with lamp holder 10.
Embodiment two
Different from embodiment one is, radiating seat described in the present embodiment 6 is established the support column 63 in order to supporting light sources 1, and the heat that described light source 1 produces reaches radiating seat 6 via support column 63, then is released into surrounding air, further promote the radiating efficiency of light source 1, as shown in Figure 4.
Embodiment three
As shown in Figure 5, the present embodiment is equipped with a plurality of pod apertures 16 that supply air stream to pass through in light source radiator 12 described in the embodiment one, two and radiating seat 6, be beneficial to like this and make the heat that is passed to light source radiator 12 and radiating seat 6 be released into fast air, and form convection current with outside air, the heat that is released into air is taken away rapidly.This moment, pod apertures 16 formed up and down comprehensive heat passage with aforementioned gap 23, further promoted the radiating effect of this lighting device.Be with contaminating impurity by making light source 1 exempt from outside air, described light source 1 is shrouded by protecting crust 3.Wherein, described protecting crust 3 roughly is positioned at diffuser 15 middle parts, is easy to make the air of 3 of described diffuser 15 and protecting crusts to form strong convection.
Heating column 13 described in the utility model embodiment and support column 63 all pass protecting crust 3, and with substrate 11 vertical connections at described light source 1 place, described like this heating column 13 and support column 63 are all large with the contact area of substrate 11, are beneficial to the heat conduction.A plurality of LED 14 are distributed in described substrate 11 upper and lower surfaces, so make the bright dipping of LED bulb lamp even.For example, described substrate 11 upper and lower surfaces are evenly equipped with four LEDs 14.
In addition, described radiating seat 6 is provided with the first reflective surface 61 towards light source 1, and described light source radiator 12 is provided with second reflective surface 62 relative with the first reflective surface 61, and wherein said the first reflective surface 61 is presented the convex arc shape.The light that LED14 sends is processed by the first reflective surface 61 and the second reflective surface 62 secondary optics first through 3 optical treatment of protective cover, will realize 360 ° of all-directional illuminations.
Embodiment four
Shown in Fig. 6 ~ 8, from above-described embodiment one, two or three different be, the utility model embodiment establishes many heat sink strips 41 in order to replace the described diffuser of above-described embodiment in described light source radiator 12 and 6 of radiating seats, and makes described heat sink strip 41, radiating seat 6 and light source radiator 12 all surfaces all be exposed to outside air fully.So increased the contact area with outside air, make simultaneously heat that light source and driving power produce no longer large tracts of land flock together, be easy to be released into surrounding air, taken away again the heat of light source and power generation by air stream, radiating effect is splendid.Should be appreciated that described bar shaped radiator 4 and the space 5 of passing through for air stream in order to 3 formation of protecting crust of protecting light source 1.In addition, light source 1 and driving power 2 are little with the spacing of outside air, and heat dissipation path is short.
Need to prove, although there is heat sink strip 41 in this lighting device, diffraction occurs when the light that light source 1 sends passes through heat sink strip 41, if watch from afar, then can't see in esse heat sink strip 41, visually is stealthy diffuser.Further, the surface of described heat sink strip 41, light source radiator 12 and radiating seat 6 is reflecting surface, so that the bright dipping of this lighting device is more even.In addition, if the heat that driving power 2 produces is less, can be with lamp holder 10 directly as power-supply radiator, to reduce production costs.
The utility model embodiment is provided with to protect the protecting crust 3 of light source 1 according to the actual requirements, and employing material and/or the structure identical with existing light fixture cell-shell.So in protection light source 1, keep again existing cell-shell in the effect of illumination effect and color.Because of the size of heat sink strip 41 outer profile sizes greater than protecting crust 3, make protecting crust 3 exempt from destruction, and can produce the LED bulb lamp with embodiment one, two or three bulb lamp same profile.Certainly, also can according to according to light source type, cancel protecting crust 3.
The below is described in detail realization of the present utility model as an example of the LED shot-light example.
Embodiment five
Different from above-mentioned arbitrary embodiment is, light source radiator described in the present embodiment 19 is a bowl cup-shaped, and described light source 1 is installed on this light source radiator 19 bottoms, shown in Fig. 9 ~ 11.Wherein, described light source radiator 19 so that 21 of described light source radiator 19 and power-supply radiators form the heat isolation, guarantees separately radiating effect thus by a plurality of heat insulation buckles 17 and power-supply radiator 21 Joints.Similarly, in the gap 23 that 17 formation of adjacent heat insulation buckle are passed through for air stream, to promote the heat dispersion of this LED shot-light.In addition, this shot-light also comprises and makes the on request lens 18 of outgoing of light that described light source 1 sends.
Embodiment six
Different from embodiment five is, light source described in the present embodiment 1 is by 18 cappings of lens, establish cooling ring lid 29 between described light source radiator 19 and the lens 18, described cooling ring lid 29 and light source radiator 19 bottoms are equipped with a plurality of pod apertures 30 that supply air stream to pass through, shown in Figure 12 ~ 14.Make so described light source radiator 19 heat radiations faster, effect is better.Simultaneously, this LED shot-light structure is simple, and efficiency of assembling is high.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims (11)

1. lighting device comprises light source and for the driving power of described light source power supply, it is characterized in that, described light source is installed on and the light source radiator of power-supply radiator heat isolation.
2. lighting device as claimed in claim 1 is characterized in that, described power-supply radiator top is established a plurality of and the heat insulation buckle radiating seat Joint, forms the gap of passing through for air stream between adjacent heat insulation buckle.
3. lighting device as claimed in claim 2 is characterized in that, establishes diffuser between described radiating seat and light source radiator, and described light source radiator links to each other with light source by heating column; The heat that described light source produces reaches light source radiator via heating column, then is released into surrounding air.
4. lighting device as claimed in claim 3 is characterized in that, described radiating seat is established the support column in order to supporting light sources, and the heat that described light source produces reaches radiating seat via support column, then is released into surrounding air.
5. such as claim 2,3 or 4 described lighting devices, it is characterized in that, described light source is shrouded by protecting crust, and described light source radiator and radiating seat are equipped with a plurality of pod apertures that supply air stream to pass through.
6. lighting device as claimed in claim 5 is characterized in that, described heating column and support column all pass protecting crust, with the substrate vertical connection at described light source place; A plurality of light sources are distributed in the upper and lower surface of described substrate.
7. lighting device as claimed in claim 6 is characterized in that, described radiating seat is provided with the first reflective surface towards light source, and described light source radiator is provided with second reflective surface relative with the first reflective surface, and wherein said the first reflective surface is presented the convex arc shape.
8. lighting device as claimed in claim 2 is characterized in that, establishes many heat sink strips between described light source radiator and radiating seat, and described heat sink strip, radiating seat and light source radiator all surface all are exposed to outside air fully.
9. lighting device as claimed in claim 8 is characterized in that, the surface of described heat sink strip, light source radiator and radiating seat is reflecting surface.
10. lighting device as claimed in claim 1 is characterized in that, described light source radiator is a bowl cup-shaped, and described light source is installed on this light source radiator bottom; Described power-supply radiator top is established a plurality of and the heat insulation buckle light source radiator Joint, forms the gap of passing through for air stream between adjacent heat insulation buckle.
11. lighting device as claimed in claim 10 is characterized in that, described light source is established the cooling ring lid by the capping of lens institute between described light source radiator and the lens, and a plurality of pod apertures that supply air stream to pass through are established in described cooling ring lid and light source radiator bottom.
CN2012204495705U 2012-09-05 2012-09-05 Lighting device Expired - Fee Related CN202769377U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2012204495705U CN202769377U (en) 2012-09-05 2012-09-05 Lighting device
PCT/CN2013/072155 WO2014036816A1 (en) 2012-09-05 2013-03-04 Illuminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012204495705U CN202769377U (en) 2012-09-05 2012-09-05 Lighting device

Publications (1)

Publication Number Publication Date
CN202769377U true CN202769377U (en) 2013-03-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012204495705U Expired - Fee Related CN202769377U (en) 2012-09-05 2012-09-05 Lighting device

Country Status (2)

Country Link
CN (1) CN202769377U (en)
WO (1) WO2014036816A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853297A (en) * 2012-09-05 2013-01-02 深圳市众明半导体照明有限公司 Illuminator
CN105276421A (en) * 2015-11-20 2016-01-27 苏州铭冠软件科技有限公司 Concave surface OLED spot light

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CN104791664A (en) * 2015-04-21 2015-07-22 江苏佳华新材料科技有限公司 Lamp for chemical industry place

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DE102010003680A1 (en) * 2010-04-07 2011-10-13 Osram Gesellschaft mit beschränkter Haftung Semiconductor lamp
CN201954312U (en) * 2010-12-28 2011-08-31 史杰 Split type light emitting diode (LED) lamp
TWM409368U (en) * 2011-01-28 2011-08-11 Fin Core Corp LED lamps
CN202361116U (en) * 2011-11-01 2012-08-01 杭州潮江科技有限公司 LED (light emitting diode) lamp with novel heat dissipation structure
CN102853297A (en) * 2012-09-05 2013-01-02 深圳市众明半导体照明有限公司 Illuminator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853297A (en) * 2012-09-05 2013-01-02 深圳市众明半导体照明有限公司 Illuminator
CN105276421A (en) * 2015-11-20 2016-01-27 苏州铭冠软件科技有限公司 Concave surface OLED spot light

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130306

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