CN202972686U - Light-emitting diode (LED) bulb - Google Patents
Light-emitting diode (LED) bulb Download PDFInfo
- Publication number
- CN202972686U CN202972686U CN2012206975961U CN201220697596U CN202972686U CN 202972686 U CN202972686 U CN 202972686U CN 2012206975961 U CN2012206975961 U CN 2012206975961U CN 201220697596 U CN201220697596 U CN 201220697596U CN 202972686 U CN202972686 U CN 202972686U
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- China
- Prior art keywords
- radiator
- ceramic substrate
- projection
- led bulb
- led
- 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
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
The utility model discloses a light-emitting diode (LED) bulb which comprises a radiator, a ceramic substrate which is contacted with the radiator, and LED light sources which are fixed on the ceramic substrate. The radiator is provided with a convex column. The convex column is provided with a first junction surface which is formed by being connected with the ceramic substrate. The ceramic substrate is provided with a second junction surface which is formed by being connected with the convex column. An area of the first junction surface is smaller than an area of the second junction surface. Limited space is utilized to provide the bulb with enough creep age distance.
Description
[technical field]
The utility model relates to a kind of lighting device, especially refers to a kind of LED lighting device.
[background technology]
Along with the development of LED technology, the LED bulb more and more is applied in the lighting devices such as light fixture.Traditional LED bulb is installed LED light source with aluminium base as base material, and along with the progress of technology, ceramic substrate due to its good heat conductivity and reliably electrical insulating property more and more be applied to substrate as LED light source.In prior art, Chinese patent application discloses No. CN10277776A and has disclosed a kind of aluminium oxide ceramics LED bulb.This aluminium oxide ceramics LED bulb comprises aluminium oxide ceramic substrate, radiator and lampshade.Some radiator is metal material, beeline (being creep age distance) between two conductor parts that record along the insulating surface of ceramic substrate like this (part that the current-carrying part edge of ceramic base plate surface is connected with ceramic base plate surface to radiator) is enough, so just is unlikely to cause insulating materials to present electrification phenomenon and leak electricity.Yet its aluminium oxide ceramic substrate held against heat sink and contacting with radiator heat makes creep age distance between alumina layer and radiator too short and do not reach the standard that needs.If need enough creep age distances, need to increase the thickness of ceramic substrate and cause cost to raise and bulb lamp weight increases.
Therefore, in order to overcome defects, be necessary to provide a kind of improved LED bulb.
[utility model content]
The purpose of this utility model is to provide a kind of LED bulb with enough creep age distances.
To achieve these goals, the utility model adopts following technical scheme: a kind of LED bulb, comprise radiator, the ceramic substrate that contacts with radiator and be fixed in LED light source on ceramic substrate, radiator has projection, projection and ceramic substrate are connected to form a joint face, ceramic substrate has a joint face and is connected with projection, and the joint face area of projection is less than the joint face area of ceramic substrate.
Compared to prior art, the utility model LED bulb has the following advantages: utilize limited space to provide bulb enough creep age distances.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of the first preferred embodiment of the utility model LED bulb.
Fig. 2 is the three-dimensional exploded view with another angle of Fig. 1.
Fig. 3 is the ceramic substrate of the first preferred embodiment of the utility model LED bulb and the stereogram of LED light source.
Fig. 4 is the schematic diagram of the second preferred embodiment of the utility model LED bulb.
[specific embodiment]
Referring to figs. 1 through shown in Figure 3, be illustrated as the utility model the first preferred embodiment, in the present embodiment, LED bulb 100 comprises radiator 104, the ceramic substrate 103 that contacts with radiator 104, the LED light source 105 that is installed on ceramic substrate 103.
The first joint face 10410 areas that in this embodiment, radiator 104 are connected with ceramic substrate 103 are done little, make conductor and the creep age distance between radiator 104 on ceramic substrate 103 increase, thereby utilize minimum space to reach the required enough creep age distances of LED bulb.
In the present embodiment, ceramic substrate 103 is fixed on radiator 104 by screw 101, has pad 102 between screw 101 and radiator 104.In other embodiment, ceramic substrate 103 also can be fixed by other means.
With reference to shown in Figure 4, be illustrated as the utility model the second preferred embodiment, in the present embodiment, LED bulb 200 comprises radiator 204, the ceramic substrate 203 that contacts with radiator 204, the LED light source 205 that is installed on ceramic substrate 203.Different from the first embodiment is that in the present embodiment, ceramic substrate 203 is the plate shaped extension that do not comprise.In the present embodiment, the shortest path between the conductor of ceramic substrate 203 (not shown) and radiator 204 is U-shaped.Shape with radiator 204 in this embodiment is basically the same as those in the first embodiment, so joint face 20410 areas that this radiator 204 is connected with ceramic substrate 203 are done little, make conductor and the creep age distance between radiator 204 on ceramic substrate 203 increase, thereby utilize minimum space to reach the required enough creep age distances of LED bulb 200.
Claims (6)
1. LED bulb, comprise radiator, the ceramic substrate that contacts with radiator and be fixed in LED light source on ceramic substrate, it is characterized in that: described radiator has projection, described projection has the first joint face that is connected to form with ceramic substrate, described ceramic substrate has the second joint face that is connected to form with described projection, and described the first joint face area is less than described the second joint face area.
2. LED bulb as claimed in claim 1, it is characterized in that: described radiator also comprises the main part that is connected with described projection, the main part of described radiator and projection form step-like radiator internal structure.
3. LED bulb as claimed in claim 1, it is characterized in that: described ceramic substrate comprises flat part and the extension that extends from described flat part edge, and described extension and described flat part shape have a certain degree and be positioned at the outside of the projection of described radiator.
4. LED bulb as claimed in claim 3, it is characterized in that: described extension is perpendicular to the flat part of described ceramic substrate.
5. LED bulb as claimed in claim 4, it is characterized in that: described radiator is that metal material is made, on described ceramic substrate, with conductor, the conductor on described ceramic substrate and the shortest path between radiator are L shaped.
6. LED bulb as claimed in claim 1, it is characterized in that: described radiator is that metal material is made, on described ceramic substrate, with conductor, the conductor on described ceramic substrate and the shortest path between radiator are U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206975961U CN202972686U (en) | 2012-12-17 | 2012-12-17 | Light-emitting diode (LED) bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206975961U CN202972686U (en) | 2012-12-17 | 2012-12-17 | Light-emitting diode (LED) bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972686U true CN202972686U (en) | 2013-06-05 |
Family
ID=48513758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206975961U Expired - Fee Related CN202972686U (en) | 2012-12-17 | 2012-12-17 | Light-emitting diode (LED) bulb |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202972686U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867934A (en) * | 2012-12-17 | 2014-06-18 | 欧普照明股份有限公司 | LED bulb |
-
2012
- 2012-12-17 CN CN2012206975961U patent/CN202972686U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867934A (en) * | 2012-12-17 | 2014-06-18 | 欧普照明股份有限公司 | LED bulb |
| WO2014094347A1 (en) * | 2012-12-17 | 2014-06-26 | 欧普照明股份有限公司 | Led light bulb |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20211217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |