CN202972830U - Light emitting diode (LED) spotlight - Google Patents
Light emitting diode (LED) spotlight Download PDFInfo
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- CN202972830U CN202972830U CN201220739811XU CN201220739811U CN202972830U CN 202972830 U CN202972830 U CN 202972830U CN 201220739811X U CN201220739811X U CN 201220739811XU CN 201220739811 U CN201220739811 U CN 201220739811U CN 202972830 U CN202972830 U CN 202972830U
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- light source
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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a light emitting diode (LED) spotlight which comprises a lamp holder (106), an alternating-current driving device (105), a heat dissipation body (104), a light source module plate (103), a fastening piece (102) and a lens (101), wherein the alternating-current driving device (105) is arranged in an airtight space formed by the heat dissipation body (104) and the lamp holder (106), the heat dissipation body (104) is arranged on the lamp holder (106), and the light source module plate (103) is mounted on the heat dissipation body (104). The fastening piece (102) is used for fixing the light source module plate (103), the heat dissipation body (104) and the lamp holder (106) altogether, and the lens (101) is mounted at a big opening end of the heat dissipation body (104). The alternating-current driving device (105) can control a series connection state and a parallel connection state of two groups of LED light source modules on the light source module plate (103) according to the change of input alternating current, so that the two groups of LED light source modules can emit light simultaneously in a full voltage state. The LED spotlight can realize a full voltage working state and the lighting of all LEDs, and has a quite high power factor and a quite long service life.
Description
Technical field
The utility model relates to a kind of LED shot-light, and it is luminous that it adopts novel AC drive apparatus to drive.
Background technology
At present, country vigorously advocates energy-saving and emission-reduction, adopts the illuminating product of LED light source at lighting field, develops rapidly with the characteristics of its good energy-conservation, low-carbon (LC) and environmental protection.
For the lighting device of LED as light source, the life-span of lighting device is not only depended on LED light source itself, also depends on the life-span of the assemblies such as driving power.In present application scheme, the bottleneck in LED lighting device life-span remains driving power.In order to reduce the driving power life-span to the impact of LED lamp life, feasible scheme is the existing dc source drive unit of improvement, perhaps designs the circuit of the brand-new direct driving LED of alternating current.
The LED shot-light has been widely applied to various occasions as a kind of novel LED lighting device.The major defect that existing LED shot-light exists is that the driving life-span is short.Reason is, the current drive scheme that adopts on the market is traditional switch power technology, this power volume is larger, heat dispersion is poor, when this power technology is applied to the LED shot-light, it offers the narrow space of driving power, and operating ambient temperature is tended towards superiority (usually more than 60 ℃) as a result, has so directly caused the life-span of driving power to be reduced.On the other hand, the cost of Switching Power Supply is high, the EMC(electromagnetic compatibility) characteristic is poor, need to add auxiliary element.
Another defective of existing LED shot-light is substantially not keep in repair after damaging to be worth, need directly to change driving power, but due to the restriction that is subject to LED shot-light power supply cavity, the driving power of generally can only change and specify producer, specifying model, maintenance cost is high, process is complicated.
At present, also occurred some in prior art and exchanged direct driving LED circuit, it normally adopts the scheme of a string LED being carried out sectional management.Although this class drive circuit life-span is high, cost is low, can only be operated in just to reach ideal effect (for example desirable luminous flux and power) under rated voltage (AC220, AC110), thereby can not realize full voltage (AC85V to AC256V) work.In addition, this LED string can not all be lighted simultaneously, can only segmentation light, and causes that most of LED does not work within a work period, causes the wasting of resources, and manufacturing cost is high.
For these reasons, need to provide the LED shot-light that adopts novel AC driving circuit to drive, can solve the above-mentioned problems in the prior art.
The utility model content
The purpose of this utility model is to provide a kind of novel LED light source AC drive apparatus, and drive luminous LED shot-light by this AC drive apparatus, to avoid the adopting traditional switch power technology as driving power, both keep the advantage of traditional LED AC driving circuit, and can well realize full voltage work again.
According to an aspect of the present utility model, a kind of LED shot-light is provided, comprising: lamp holder 106; AC drive apparatus 105 is arranged in the enclosure space of radiator 104 and lamp holder 106 formations, and it is connected electrically between lamp holder 106 and light source module plate 103; Radiator 104 is arranged on lamp holder 106, forms from the osculum end to big opening end the horn-like of transition gradually; Light source module plate 103 is arranged on the big opening end of radiator 104, is provided with two groups of LED light source modules on it; Securing member 102 is used for LED light source module plate 103, radiator 104 and lamp holder 106 are fixed together; With lens 101, be arranged on the big opening end of radiator 104; Wherein, described AC drive apparatus 105 can be controlled the connection in series-parallel state of two groups of LED light source modules on light source module plate 103 according to the variation of input AC electric current, makes these two groups of LED light source modules can be under full voltage simultaneously luminous.
Wherein, described AC drive apparatus 105 comprises: rectification module 11, be connected to external ac power source, and be used for the alternating current of input is carried out rectification with the output ripple DC current; Division module 12 is connected to the positive-negative output end of rectification module 11, based on described pulsating direct current electric current output ripple DC voltage; Control module 13 is connected to described division module 12 and described two groups of LED light source modules.
Wherein, when described pulsating dc voltage rose to the luminous voltage of described two groups of LED light source modules, described control module 13 was controlled these two groups of LED light source modules and is in state in parallel and luminous; When described pulsating dc voltage rose to the twice of described luminous voltage, described control module 13 was controlled described two groups of LED light source modules and is in series connection and luminous.
Wherein, described rectification module 11 comprises four commutation diodes 201,202,203,204, and wherein every two commutation diodes series connection forms respectively a branch road, and two branch circuit parallel connections form this rectification module 11.
Wherein, described division module 12 comprises two divider resistances that are connected in series 205,206.
Wherein, described two groups of LED light source modules comprise the first LED light source module 207 and the second LED light source module 211, described control module 13 comprises: control device 212, its input are connected between described two divider resistances, are used for detecting in real time the voltage swing of described pulsating dc voltage; The first and second transistors 208,210, these two transistorized grids are connected respectively to the output of described control device, the first transistor 208 is connected between the anode of the negative terminal of the first LED light source module 207 and described division module 12, and transistor seconds 210 is connected between the negative terminal of the anode of the second LED light source module 211 and described division module 12; Diode 209 is connected between the anode of the negative terminal of described the first LED light source module 207 and the second LED light source module 211.
Wherein, when described control device 212 detected described pulsating dc voltage and rises to the luminous voltage of described LED light source module, it controlled first and second transistors 208,210 conductings, diode 209 cut-offs; When described control device 212 detected described pulsating dc voltage and rises to the twice of described luminous voltage, it controlled first and second transistors 208,210 cut-offs, diode 209 conductings.
Optionally, described two groups of LED light source modules are single low-voltage light source or the high-voltage LED module that adopts the COB encapsulation.
According to LED light source AC drive apparatus of the present utility model, avoid adopting the direct driving technologies that exchanges of traditional switch power technology and sectional management, can realize full voltage work, and realize that all LED all light within the same work period, have simultaneously higher power factor (greater than 0.95).Adopt the LED shot-light cost of this AC drive apparatus low, volume is little, power factor is high, steady quality is reliable, long working life.
Description of drawings
Fig. 1 has shown the exploded view of the utility model LED shot-light;
Fig. 2 has shown the circuit diagram of the AC drive apparatus that the utility model LED shot-light adopts.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage more cheer and bright, below in conjunction with the specific embodiment and with reference to accompanying drawing, the utility model is further described.Should be appreciated that, these descriptions are exemplary, and do not really want to limit scope of the present utility model.In addition, in the following description, omitted the description to known features and technology, to avoid unnecessarily obscuring concept of the present utility model.
Fig. 1 has shown the exploded view of the utility model LED shot-light.
As shown in Figure 1, LED shot-light of the present utility model comprises lens 101, securing member 102, light source module plate 103, radiator 104, AC drive apparatus 105, lamp holder 106.
Light source module plate 103 is arranged on the big opening end of radiator 104, is used for the carrying LED light source.As shown in Figure 1, be provided with two groups of LED light source modules on light source module plate 103, its output that is electrically connected to AC drive apparatus 105 is to access drive current, driving LED light source luminescent when energising.In the utility model, described LED light source module can be single low-voltage light source, can be also the high-voltage LED module that adopts the COB encapsulation.
Securing member 102 is used for LED light source module plate 103, radiator 104 and lamp holder 106 are fixed together.As shown in Figure 1, the preferred screw that adopts of securing member 102.
In the utility model, the AC drive apparatus 105 that the LED shot-light adopts is different from traditional AC drive apparatus, it can control the connection in series-parallel state of two groups of LED light source modules on light source module plate 103 according to the variation of input AC electric current, make these two groups of LED light source modules can be under full voltage luminous work simultaneously.Below, introduce in detail the structure of the AC drive apparatus 105 that the utility model LED shot-light adopts.
Fig. 2 has shown the circuit diagram of the AC drive apparatus that the utility model LED shot-light adopts.
As shown in Figure 2, AC drive apparatus 105 of the present utility model is used for providing drive current luminous to drive it to LED light source, it comprises: rectification module 11, be connected to external ac power source, and be used for the alternating current of input is carried out rectification with the output ripple DC current; Division module 12 is connected to the positive-negative output end of rectification module 11, based on described pulsating direct current electric current output ripple DC voltage; Control module 13 is connected to described division module 12 and described the first and second LED light source modules 207,211.
Wherein, when described pulsating dc voltage rose to described the first and second LED light source modules 207,211 luminous voltage, described control module 13 was controlled described the first and second LED light source modules 207,211 and is in state in parallel and luminous; When described pulsating dc voltage rose to the twice of described luminous voltage, described control module 13 was controlled described the first and second LED light source modules 207,211 and is in series connection and luminous.
Specifically, described rectification module 11 comprises four commutation diodes 201,202,203,204, and wherein every two commutation diodes series connection forms respectively a branch road, and two branch circuit parallel connections form this rectification module 11.
Diode 201,202,203,204,209 can be common commutation diode, can be also withstand voltage enough Schottky diode or other components and parts that can realize identical function.Transistor 208,210 can be N-MOSFET, can be also the NPN triode.
Described division module 12 comprises two divider resistances that are connected in series 205,206.Resistance 205 first ends are connected with the first end of resistance 206; Resistance 205 second ends and diode 201,203 negative terminal are connected.Resistance 206 second ends and diode 202,204 anode are connected; Resistance 205 first ends are connected with control device 212 with the first end of resistance 206; Control device 212 is connected with transistor 208,210 grid respectively.
Described control module 13 comprises control device 212, the first and second transistors 208,210 and diode 209.
The input of control device 212 is connected between described two divider resistances, is used for detecting in real time the voltage swing of described pulsating dc voltage.The first and second transistors 208,210 grid are connected respectively to the output of described control device, the first transistor 208 is connected between the anode of the negative terminal of the first LED light source module 207 and described division module 12, and transistor seconds 210 is connected between the negative terminal of the anode of the second LED light source module 211 and described division module 12.Diode 209 is connected between the anode of the negative terminal of described the first LED light source module 207 and the second LED light source module 211.
Specifically, as shown in Figure 2, the anode of the first LED light source module 207 and diode 201,203 negative terminal are connected; The anode of the second LED light source module 211 and diode 202,204 anode are connected.The anode of diode 209 is connected with the negative terminal of the first LED light source module 207; The negative terminal of diode 209 is connected with the anode of the second LED light source module 211.The drain electrode of transistor 208 is connected with the anode that the negative terminal of the first LED light source module 207 is connected with diode; The source electrode of transistor 208 and diode 202,204 anode and the negative terminal of LED light source module 211 of being connected are connected.The drain electrode of transistor 210 is connected with the anode of the first LED light source module 207; The negative terminal of the source electrode of transistor 210 and diode 209 be connected the anode of LED light source module 211 and be connected.
As shown in Figure 2, the first LED light source module 207 and the second LED light source module 211 that are arranged on light source module plate 103 of 105 pairs of AC drive apparatus provides drive current luminous to drive it.
The below introduces the operation principle of AC drive apparatus.
In Fig. 2, the first and second LED light source modules 207,211 are formed by the series connection of one or more LED light sources respectively.Each LED light source has specified luminous voltage VF0, and when the tube voltage drop at LED light source two ends reached this luminous voltage VF0, this LED light source was luminous.Further, form the first and second LED light source modules 207,211 by the series connection of a plurality of LED light sources and have accordingly specified luminous voltage nVF0, n represents the quantity of the LED light source that is connected in series in the light source module.In the course of the work, on the first and second LED light source modules 207,211, the actual tube voltage drop that produces is respectively VF1, VF2, and when this tube voltage drop VF1, VF2 rose to the specified luminous voltage nVF0 of this light source module, this light source module can electrified light emitting.
After energising, the alternating current of AC power AC output produces the pulsating direct current electric current by diode 201,202,203,204 rectifications, this pulsating direct current electric current produces pulsating dc voltage at divider resistance 205,206 two ends, this pulsating dc voltage is input in control device 212 and the first and second LED light source modules 207,211 after by divider resistance 205,206 dividing potential drops, produce respectively tube voltage drop VF1, VF2 on the first and second LED light source modules 207,211, VF1 equals or is approximately equal to VF2.When tube voltage drop VF1, the VF2 of LED light source module rose to its specified luminous voltage nVF0, the LED light source meeting conducting in this group LED light source module was luminous.
Preferably, divider resistance 205,206 resistances equate or approximately equal, by the pulsating dc voltage exported after rectification module 11 rectifications via divider resistance 205,206 dividing potential drops.Control device 212 detects the voltage V/2 on divider resistance 206 in real time, and then the magnitude of voltage that can calculate on divider resistance 205,206 is V, and this magnitude of voltage is also the pulsating dc voltage V that exports after rectification module 11 rectifications.
When switching on the starting stage, the voltage V/2 that control device 212 detects on divider resistance 206 rises to (nVF0)/2, mean that namely the pulsating dc voltage V of described rectification module output is from 0 volt of luminous voltage nVF0 that rises to the LED light source module, this timed unit 212 is controlled transistor 208,210 conductings, diode 209 is in cut-off state, makes the first LED light source module 207 be in state in parallel with the second LED light source module 211.Like this, tube voltage drop VF1, VF2 on two LED light source modules all reach its luminous voltage, thereby make two LED modules all in running order.
When control device 212 detects voltage V/2 on divider resistance 206 and continues to rise to nVF0, the pulsating dc voltage V that namely means described rectification module output rises to the twice 2nVF0 of the luminous voltage of LED light source module from nVF0, this timed unit 212 is controlled transistor 208,210 cut-offs, diode 209 is in conducting state, makes the first LED light source module 207 and the second LED light source module 211 be in series connection.Like this, tube voltage drop VF1, VF2 on two LED light source modules all reach its luminous voltage, thereby make two LED modules all in running order.
By the control of above-mentioned AC drive apparatus, the work conducting voltage of the first and second LED light source modules can change at any time, thereby has realized the work of full voltage.And two LED light source modules can be worked in above-mentioned two kinds of duties, have therefore realized that all LED work simultaneously.
In the circuit structure of above-mentioned AC drive apparatus, the forward voltage drop tube of LED light source module reduces by half, realized conducting when voltage is low, like this in a voltage cycle, voltage utilization improves greatly, thereby makes also corresponding raising (greater than 0.95) of power factor.
In addition, do not use needed electrochemical capacitor in the traditional switch power technology in above-mentioned AC drive apparatus, thereby long working life.In addition, do not use other electric capacity or inductance in this AC drive apparatus yet, thereby have good EMC characteristic.Due to the life-span usually above LED device life-span of semiconductor devices, therefore, adopt the AC drive apparatus of foregoing circuit simple in structure, with low cost, long service life.
In addition; the circuit arrangement of the utility model AC drive apparatus can use resolution element to build according to circuit theory diagrams of the present utility model; can be also to use the mode of integrated circuit to be integrated into an electronic component, all belong to protection domain of the present utility model.
Although described embodiment of the present utility model in detail, it should be understood that and to make various changes, replacement and change to embodiment of the present utility model in the situation that do not depart from spirit and scope of the present utility model.
Claims (7)
1. LED shot-light comprises:
Lamp holder (106);
AC drive apparatus (105) is arranged in the enclosure space of radiator (104) and lamp holder (106) formation, and it is connected electrically between lamp holder (106) and light source module plate (103);
Radiator (104) is arranged on lamp holder (106), forms from the osculum end to big opening end the horn-like of transition gradually;
Light source module plate (103) is arranged on the big opening end of radiator (104), is provided with two groups of LED light source modules on it;
Securing member (102) is used for LED light source module plate (103), radiator (104) and lamp holder (106) are fixed together; With
Lens (101) are arranged on the big opening end of radiator (104);
Wherein, described AC drive apparatus (105) can be controlled the connection in series-parallel state of two groups of LED light source modules on light source module plate (103) according to the variation of input AC electric current, makes these two groups of LED light source modules can be under full voltage simultaneously luminous.
2. LED shot-light according to claim 1, described AC drive apparatus (105) comprising:
Rectification module (11) is connected to external ac power source, is used for the alternating current of input is carried out rectification with the output ripple DC current;
Division module (12) is connected to the positive-negative output end of rectification module (11), based on described pulsating direct current electric current output ripple DC voltage;
Control module (13) is connected to described division module (12) and described two groups of LED light source modules;
Wherein, when described pulsating dc voltage rose to the luminous voltage of described two groups of LED light source modules, described control module (13) was controlled these two groups of LED light source modules and is in state in parallel and luminous;
When described pulsating dc voltage rose to the twice of described luminous voltage, described control module (13) was controlled described two groups of LED light source modules and is in series connection and luminous.
3. LED shot-light according to claim 2, described rectification module (11) comprises four commutation diodes (201,202,203,204), wherein every two commutation diodes series connection forms respectively a branch road, and two branch circuit parallel connections form this rectification module (11).
4. LED shot-light according to claim 2, described division module (12) comprises two divider resistances that are connected in series (205,206).
5. LED shot-light according to claim 2, described two groups of LED light source modules comprise the first LED light source module (207) and the second LED light source module (211), described control module (13) comprising:
Control device (212), its input are connected between described two divider resistances, are used for detecting in real time the voltage swing of described pulsating dc voltage;
The first and second transistors (208,210), these two transistorized grids are connected respectively to the output of described control device, the first transistor (208) is connected between the anode of the negative terminal of the first LED light source module (207) and described division module (12), and transistor seconds (210) is connected between the negative terminal of the anode of the second LED light source module (211) and described division module (12);
Diode (209) is connected between the anode of the negative terminal of described the first LED light source module (207) and the second LED light source module (211).
6. LED shot-light according to claim 5, wherein,
When described control device (212) detected described pulsating dc voltage and rises to the luminous voltage of described LED light source module, it controlled the first and second transistors (208,210) conducting, diode (209) cut-off;
When described control device (212) detected described pulsating dc voltage and rises to the twice of described luminous voltage, it controlled first and second transistors (208,210) cut-off, diode (209) conducting.
7. the described LED shot-light of any one according to claim 1-6, described two groups of LED light source modules are single low-voltage light source or the high-voltage LED module that adopts the COB encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220739811XU CN202972830U (en) | 2012-12-28 | 2012-12-28 | Light emitting diode (LED) spotlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220739811XU CN202972830U (en) | 2012-12-28 | 2012-12-28 | Light emitting diode (LED) spotlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972830U true CN202972830U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220739811XU Expired - Fee Related CN202972830U (en) | 2012-12-28 | 2012-12-28 | Light emitting diode (LED) spotlight |
Country Status (1)
| Country | Link |
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| CN (1) | CN202972830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546363A (en) * | 2014-10-21 | 2016-05-04 | 三星电子株式会社 | Light emitting device |
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2012
- 2012-12-28 CN CN201220739811XU patent/CN202972830U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546363A (en) * | 2014-10-21 | 2016-05-04 | 三星电子株式会社 | Light emitting device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20171228 |