CN102235592B - High-power LED (light emitting diode) lamp - Google Patents
High-power LED (light emitting diode) lamp Download PDFInfo
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- CN102235592B CN102235592B CN2010101604138A CN201010160413A CN102235592B CN 102235592 B CN102235592 B CN 102235592B CN 2010101604138 A CN2010101604138 A CN 2010101604138A CN 201010160413 A CN201010160413 A CN 201010160413A CN 102235592 B CN102235592 B CN 102235592B
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- circuit board
- led unit
- bearing seat
- load bearing
- heat
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Abstract
The invention provides a high-power LED (light emitting diode) lamp which comprises circuit boards, an LED unit and a bearing seat, wherein the circuit board is provided with through holes; the circuit boards among the through holes are arranged in a non-linear connection mode; the LED unit is electrically connected with the circuit boards; the LED unit is connected with the bearing seat in a contact mode; the bottom of each circuit board is provided with a welding plate; the upper part of the LED unit is provided with a positive connecting electrode and a negative connecting electrode; the bottom of the LED unit is provided with a heat-conduction connecting part; the positive connecting electrode and negative connecting electrode of the LED unit are electrically connected with the welding plate of the circuit board; the heat-conduction connecting part at the bottom of the LED unit is connected with the bearing seat; and the light emitting part of the LED unit is received in the through holes on the circuit board. The high-power LED lamp with such as structure provided by the invention can be manufactured by virtue of a reflow soldering mode, thus the manufacturing time of the lamp is shortened, a non-linear circuit board arrangement structure is also adopted, unsoldering and insufficient soldering for the LED unit in a manufacturing process can not be brought by different heat expansion coefficients of the circuit board and the bearing seat, and the yield of the lamp can be improved greatly, and the service life can be prolonged.
Description
Technical field
The present invention relates to a kind of lighting, particularly relate to a kind of high-powered LED lamp.
Background technology
Along with the user demand of joint carbon emission reduction and energy conservation, the advantage that the high efficiency of LED and low environment pollute makes LED will become the new light sources that possesses alternative conventional fluorescent of 21 century as the use of light source.But, because LED adopts the electronics of semi-conductive PN junction and the mode of hole generation photon to realize illumination, and LED in actual applications, only can convert about 15% electric energy to luminous energy, other energy all gives off in the mode of heat, so must cause the light fixture heat to improve, so how to dispel the heat becomes the key that can the LED light fixture realize that industrialization and large-power lamp are made.
Existing LED light fixture substitutes high-power traditional high-power illumination light fixture in order to realize the LED light fixture, and the great power LED luminescence unit is used on this type of light fixture.In order to dispel the heat, LED unit seat is located on the metal pedestal, simultaneously, the board sleeve that monoblock is offered perforate is located on the LED unit, metal pedestal, LED unit and circuit board are welded through the Reflow Soldering mode together, LED unit and circuit board electrically connect, and metal pedestal is welded in the LED unit bottom to realize the heat conduction.
Yet, though owing to adopt the Reflow Soldering mode can improve the speed of production and processing, but because circuit board and metal pedestal have different coefficient of heat transfers, so in the temperature difference through the Reflow Soldering front and back, the difference of expanding with heat and contract with cold that causes each parts makes LED unit displacement and causes sealing-off between itself and the circuit board.
As shown in Figure 1, a kind of traditional LED lamp includes heat radiating metal seat 1, LED unit 2 reaches the circuit board 3 that is used for being electrically connected a plurality of LED unit.LED luminescence unit 2 upwards is electrically connected with the pad of circuit board 3 bottoms, and LED unit 2 is close to metal pedestal 1 downwards and is connected the heat that produces with 2 work of LED unit the time and radiate by metal pedestal 1, with the operating temperature of reduction LED unit 2.With metal pedestal 1 usefulness fine copper realize, circuit board 3 usefulness FR-4 realize further specifying, the thermal coefficient of expansion of circuit board 3 is 9.2 * 10
-6K
-1, and the thermal coefficient of expansion of fine copper is 1.7 * 10
-6K
-1When circuit board 3 is of a size of 33.5mm * 33.5mm * 1mm, environment temperature is 20 ℃, the Reflow Soldering welding temperature is 250 ℃, then the lateral expansion amount of this circuit board is 0.07mm, the thermal expansion amount of copper is ignored, then the LED lamp returns back to environment temperature from the welding temperature of Reflow Soldering after welding, and then the pad on LED unit and the circuit board is subjected to recovery stress and rosin joint or sealing-off.So make light fixture to light or to make that the life-span appears in light fixture in actual applications extremely short owing to rosin joint.
Summary of the invention
The objective of the invention is the defective at above-mentioned prior art existence, a kind of high-powered LED lamp is provided, this LED lamp comprises circuit board, LED unit and load bearing seat.Wherein, offer perforation on the circuit board, the circuit board between the perforation is arranged to non-rectilinear and is connected, and load bearing seat is metal material, the LED unit is electrically connected with circuit board, and the contact of LED unit and load bearing seat is connected the heat that produces with the LED cell operation time and conducts to load bearing seat.The circuit board bottom is provided with welded disc, top, LED unit is provided with the positive and negative connection utmost point, the LED unit bottom is provided with heat-conductive connection part, the positive and negative connection utmost point of LED unit and the welded disc of circuit board electrically connect, the heat-conductive connection part of LED unit bottom is connected with the load bearing seat of being made by metal material that is used for heat radiation, and the light out part branch of LED unit is located in the perforation of offering on the circuit board.Circuit board between the adjacent perforated becomes S shape or Z shape.Offer locating slot on the circuit board, load bearing seat upwards protrudes out and is formed with fixed leg, and this fixed leg is arranged in the locating slot.Load bearing seat has upwards protruded out fixedly projection, and LED unit seat is located at fixedly on the projection.Circuit board one side is provided with for the bottom-up cable-through hole that passes of lead, and the circuit board upper surface respectively arranges a welded disc in the cable-through hole both sides, and this welded disc is used for being electrically connected with lead, and lead conducts to the LED unit with electric energy through circuit board.
For solving the problem that prior art exists, provide another kind of high-powered LED lamp based on same inventive concept.This LED lamp comprises circuit board, LED unit and load bearing seat, the circuit board upper surface is provided with welded disc, the LED unit bottom is provided with the positive and negative connection utmost point and heat-conductive connection part, the positive and negative connection utmost point is positioned at the both sides of heat-conductive connection part, the positive and negative connection utmost point of LED unit and the welded disc of circuit board electrically connect, the heat-conductive connection part of LED unit bottom is connected with the load bearing seat of being made by metal material that is used for heat radiation, the light out part branch of LED unit is located in the perforation of offering on the circuit board, circuit board between the adjacent perforated is S shape or Z shape, offer locating slot on the circuit board, load bearing seat upwards protrudes out and is formed with fixed leg, and this fixed leg is arranged in the locating slot.Load bearing seat has upwards protruded out projection, and projection passes the perforation that arranges on the circuit board and is connected to the heat-conductive connection part of LED unit.Circuit board one side is provided with for the bottom-up cable-through hole that passes of lead, and the circuit board upper surface respectively arranges a welded disc in the cable-through hole both sides, and this welded disc is used for being electrically connected with lead, and lead conducts to the LED unit with electric energy through circuit board.
As mentioned above, high-powered LED lamp of the present invention adopts structure like this can use the Reflow Soldering mode to process, make shorten the process time of light fixture, and owing to adopt non-directional circuit board that structure is set, make sealing-off and the rosin joint that the LED unit can not cause owing to the circuit board thermal expansion factor different with load bearing seat in processing and manufacturing, yield rate and the service life of improving light fixture greatly.
Description of drawings
In Figure of description:
Fig. 1 is the schematic perspective view of traditional LED lamp;
Fig. 2 is high-powered LED lamp schematic perspective view of the present invention;
Fig. 3 is the three-dimensional exploded view of high-powered LED lamp of the present invention.
The description of reference numerals of each element is as follows among the figure:
Metal pedestal 1 circuit board 2
LED unit 3 high-powered LED lamps 100
Locating slot 12 perforation 14
Welded disc 15 cable-through holes 16
Fixing projection 31 fixed legs 32
The specific embodiment
For describing technology contents of the present invention, architectural feature, the purpose that realizes and effect in detail, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 2, this high-powered LED lamp 100 comprises circuit board 10, LED unit 20 and load bearing seat 30.This LED unit 20 is arranged between circuit board 10 and the load bearing seat 30, and this LED unit 20 upwards is connected with conductive welding disk that circuit board 10 backs arrange and is close to load bearing seat 30 and is connected with heat conduction.
See also Fig. 3, this circuit board 10 is roughly rectangular, circuit board 10 1 sides are provided with for the bottom-up cable-through hole that passes 16 of lead, circuit board 10 upper surfaces respectively arrange a welded disc 15 in cable-through hole 16 both sides, this welded disc 15 is used for being electrically connected with lead, and lead conducts to LED unit 20 with electric energy through circuit board 10.Respectively offer a perforation 14 on four angular ranges of circuit board 10, the light that this perforation 14 is used for allowing LED unit 20 send is derived.Offer two parallel short slots 11 between the adjacent perforation 14 in two left and right sides, make that the wiring boards between two perforation 14 are S-shaped.Be symmetrically arranged with two locating slots 12 on the circuit board 10.These 20 upper surface both sides, LED unit are provided with the conductive solder portion of bar shaped, and the bottom of LED unit 20 is the heat-conducting layer that can weld.
In concrete processing and manufacturing, tin cream is brushed in positive and negative the be connected utmost point place of circuit board 10 with LED unit 20, and in the heat conduction and heat radiation portion of 20 bottoms, LED unit and the contact-making surface place of load bearing seat 30 tin cream is set, with the one that is provided with tin cream of circuit board 10, LED unit 20 and load bearing seat 30 through the high temperature reflux weldering, and then realize LED unit 20 and the electrical connection of circuit board 10 reach with load bearing seat 30 between heat conduction be connected.
In the present embodiment, the quantity of this LED unit 20 is 4, and circuit board 10 and load bearing seat 30 are rectangular.In concrete enforcement, this circuit board 10 can be bar shaped, and corresponding load bearing seat 30 is bar shaped.In order to make light fixture integrated, load bearing seat 30 can arrange forming V-shape or U-shaped, the bottom that load bearing seat 30 is close in LED unit 20 arranges, circuit board 10 is provided with perforate and is used for being installed with LED unit 20, offering short slot between the perforate connects to realize the elasticity between each perforate, the mode of offering of this short slot is not limited to and S-shaped or Z-shaped mode, Yi Bian can offer single short slot yet.
This improved circuit board, between the perforation of holding the LED unit, the connecting circuit plate that is non-linear shape or S shape that adopts etched mode to be processed into, when expanding with heat and contract with cold, this S portion is because diameter is thinner, and the stress of generation is very little, this understrressing is to promote led chip, and because heat rises and makes the perk of S shape connecting portion, cooling back S dress connecting portion returns to original state, can not produce Influence of Displacement to led chip.
The relation that arranges of circuit board, LED unit and load bearing seat can be: the LED unit is arranged on the circuit board, load bearing seat raises up than short projection, this projection passes the perforation that arranges on the circuit board and is connected to the bottom of LED unit, and the circuit board between the perforation is non-linear shape.
In sum, protection scope of the present invention is not limited to above-described embodiment, still all should belong to interest field of the present invention as for the change of component count described in this specification or the replacement of equivalent elements etc.
Claims (9)
1. high-powered LED lamp, comprise circuit board, LED unit and load bearing seat, it is characterized in that: offer perforation on the circuit board, offer two parallel short slots between the adjacent perforation in two left and right sides, circuit board between the perforation is arranged to non-rectilinear and is connected, load bearing seat is metal material, and the LED unit is electrically connected with circuit board, and the contact of LED unit and load bearing seat is connected the heat that produces with the LED cell operation time and conducts to load bearing seat; The LED unit bottom is provided with heat-conductive connection part, and the heat-conductive connection part of LED unit bottom is connected with the load bearing seat of being made by metal material that is used for heat radiation, and the light out part branch of LED unit is located in the perforation of offering on the circuit board; Load bearing seat has upwards protruded out fixedly projection, and LED unit seat is located at fixedly on the projection.
2. high-powered LED lamp according to claim 1 is characterized in that: the circuit board bottom is provided with welded disc, and top, LED unit is provided with the positive and negative connection utmost point, the positive and negative connection utmost point of LED unit and the electric connection of the welded disc of circuit board.
3. high-powered LED lamp according to claim 2, it is characterized in that: the circuit board between the adjacent perforated becomes S shape or Z shape.
4. high-powered LED lamp according to claim 3, it is characterized in that: offer locating slot on the circuit board, load bearing seat upwards protrudes out and is formed with fixed leg, and this fixed leg is arranged in the locating slot.
5. high-powered LED lamp according to claim 4, it is characterized in that: circuit board one side is provided with for the bottom-up cable-through hole that passes of lead, the circuit board upper surface respectively arranges a welded disc in the cable-through hole both sides, this welded disc is used for being electrically connected with lead, and lead conducts to the LED unit with electric energy through circuit board.
6. high-powered LED lamp according to claim 1, it is characterized in that: the circuit board upper surface is provided with welded disc, the LED unit bottom is provided with the positive and negative connection utmost point and heat-conductive connection part, the positive and negative connection utmost point is positioned at the both sides of heat-conductive connection part, the positive and negative connection utmost point of LED unit and the welded disc of circuit board electrically connect, the heat-conductive connection part of LED unit bottom is connected with the load bearing seat of being made by metal material that is used for heat radiation, the light out part branch of LED unit is located in the perforation of offering on the circuit board, and the circuit board between the adjacent perforated is S shape or Z shape.
7. high-powered LED lamp according to claim 6, it is characterized in that: offer locating slot on the circuit board, load bearing seat upwards protrudes out and is formed with fixed leg, and this fixed leg is arranged in the locating slot.
8. high-powered LED lamp according to claim 7, it is characterized in that: load bearing seat has upwards protruded out projection, and projection passes the perforation that arranges on the circuit board and is connected to the heat-conductive connection part of LED unit.
9. high-powered LED lamp according to claim 8, it is characterized in that: circuit board one side is provided with for the bottom-up cable-through hole that passes of lead, the circuit board upper surface respectively arranges a welded disc in the cable-through hole both sides, this welded disc is used for being electrically connected with lead, and lead conducts to the LED unit with electric energy through circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101604138A CN102235592B (en) | 2010-04-27 | 2010-04-27 | High-power LED (light emitting diode) lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101604138A CN102235592B (en) | 2010-04-27 | 2010-04-27 | High-power LED (light emitting diode) lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235592A CN102235592A (en) | 2011-11-09 |
| CN102235592B true CN102235592B (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101604138A Active CN102235592B (en) | 2010-04-27 | 2010-04-27 | High-power LED (light emitting diode) lamp |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398360B (en) * | 2013-08-10 | 2016-04-27 | 宁波丽星照明科技有限公司 | Heat dissipation structure of LED lamp |
| JP7049120B2 (en) * | 2018-01-19 | 2022-04-06 | 株式会社小糸製作所 | Lamp unit, vehicle lamp, and lamp unit manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201170529Y (en) * | 2008-02-20 | 2008-12-24 | 丽鸿科技股份有限公司 | LED module group |
| CN101346584A (en) * | 2005-12-22 | 2009-01-14 | 松下电工株式会社 | Luminaire using LED |
| CN201636635U (en) * | 2010-04-27 | 2010-11-17 | 林万炯 | Large-power LED lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009164046A (en) * | 2008-01-09 | 2009-07-23 | Sadao Momiyama | Led luminaire |
-
2010
- 2010-04-27 CN CN2010101604138A patent/CN102235592B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346584A (en) * | 2005-12-22 | 2009-01-14 | 松下电工株式会社 | Luminaire using LED |
| CN201170529Y (en) * | 2008-02-20 | 2008-12-24 | 丽鸿科技股份有限公司 | LED module group |
| CN201636635U (en) * | 2010-04-27 | 2010-11-17 | 林万炯 | Large-power LED lamp |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2009-164046A 2009.07.23 |
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| CN102235592A (en) | 2011-11-09 |
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| C14 | Grant of patent or utility model | ||
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Owner name: NINGBO HI. TECH. PARK SELF ELECTRONICS CO., LTD. Free format text: FORMER OWNER: LIN WANJIONG Effective date: 20141008 |
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Effective date of registration: 20141008 Address after: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee after: SELF ELECTRONICS CO.,LTD. Address before: 315103 Zhejiang city of Ningbo province high tech Zone Juxian Road No. 1345 Patentee before: Lin Wanjiong |
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Address after: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee after: SELF ELECTRONICS CO., LTD. Address before: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee before: SELF ELECTRONICS CO.,LTD. |