CN201426199Y - Light regulating device and lighting device - Google Patents
Light regulating device and lighting device Download PDFInfo
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- CN201426199Y CN201426199Y CN2009201550412U CN200920155041U CN201426199Y CN 201426199 Y CN201426199 Y CN 201426199Y CN 2009201550412 U CN2009201550412 U CN 2009201550412U CN 200920155041 U CN200920155041 U CN 200920155041U CN 201426199 Y CN201426199 Y CN 201426199Y
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Abstract
The utility model discloses a light regulating device and a lighting device, wherein the light regulating device comprises a rectification unit, a controller, a voltage division circuit and a voltageconverter, wherein the rectification unit is used for rectifying an alternating current power supply for generating first work voltage. The voltage division circuit is used for outputting the partialpressure of the first work voltage. The controller integrates partial pressure for getting average voltage values, and outputs impulse width modulating signals according to the average voltage value.The voltage converter is used for driving a luminous diode, and regulates the drive voltage and the drive electric current of the luminous diode according to impulse width modulating signals, whereinthe controller regulates the impulse width modulating signals according to feedback signals which are output by the voltage converter.
Description
Technical field
The utility model relates to a kind of light modulating device, and particularly relevant for a kind of light modulating device that is applicable to the LED LED light lamp.
Background technology
Correlation technique part at lighting device has dimmer usually, in order to the control power supply so that light-emitting device (for example bulb) luminous except Push And Release also can have the luminous effect of fine setting.Fig. 1 illustrates traditional lighting device.Please refer to Fig. 1, lighting device 100 has power supply 102, dimmer 104 and bulb 106.Power supply 102 provides input voltage, and wherein input voltage can be alternating current.When the user saw through the illumination effect of dimmer 104 control bulbs 106, dimmer 104 can provide the illumination effect of voltage with fine setting bulb 106 according to turn-on condition.Further, the light-emitting device that conventional illuminator disposed presents resistance characteristic usually with circuit structure, for example traditional osram lamp.
Along with under the scientific and technological trend of carbon reduction, (Light Emitting Diode, LED) lamp becomes one of option of light-emitting device to light-emitting diode gradually.Therefore consider based on cost-effective, correlation technique can be come replacement bulb 106 with the LED lamp under the situation of not changing power supply 102 and dimmer 104.Only the LED lamp presents capacitance characteristic usually with circuit structure, so when the user sees through the brightness of dimmer 104 control LED lamps, the alternating current that power supply 102 is exported is after dimmer 104 conductings, and the voltage that dimmer 104 is provided can make the LED lamp present scintillation.
The utility model content
Example embodiment of the present utility model provides a kind of light modulating device, can receive AC power that dimmer provides so that stable driving voltage and drive current to be provided.
Example embodiment of the present utility model provides a kind of lighting device, can receive AC power that dimmer provides so that stable driving voltage and drive current to be provided, light-emitting diode according to driving voltage and drive current to provide corresponding lightness stabilized.
Example embodiment of the present utility model provides a kind of light modulating device, is applicable to receive AC power with the driven for emitting lights diode.Light modulating device comprises rectification unit, controller, bleeder circuit and electric pressure converter.Rectification unit in order to rectification AC power to produce first operating voltage.Bleeder circuit is coupled to first operating voltage, in order to produce the dividing potential drop corresponding to first operating voltage.Controller couples bleeder circuit, and the voltage of dividing potential drop is carried out integration obtaining average voltage level, and according to average voltage level output pulse wave width modulation signal.Electric pressure converter couples between controller and the light-emitting diode, adjust the driving voltage and the drive current of light-emitting diode in order to the driven for emitting lights diode and according to the pulse wave width modulation signal, its middle controller is more adjusted the pulse wave width modulation signal according to the feedback signal that electric pressure converter is exported.
In an example embodiment of the present utility model, above-mentioned rectification unit comprises rectifier, filter and pressurizer (Regulator).Rectifier in order to rectification AC power to produce first operating voltage.Filter is coupled to the output of rectifier, in order to export filtering voltage to electric pressure converter.Pressurizer is coupled to the output of filter, in order to export second operating voltage to controller.
In an example embodiment of the present utility model, above-mentioned rectification unit comprises rectifier, filter and pressurizer.Rectifier in order to rectification AC power to produce first operating voltage to electric pressure converter.Filter is coupled to the output of rectifier, in order to the output filtering voltage.Pressurizer is coupled to the output of filter, in order to export second operating voltage to controller.
In an example embodiment of the present utility model, above-mentioned electric pressure converter is a reduction voltage circuit.
In an example embodiment of the present utility model, above-mentioned controller be ASIC(Application Specific Integrated Circuit) (Application-Specific Integrated Circuit, ASIC).
In an example embodiment of the present utility model, above-mentioned AC power is via the adjusted AC power of dimmer.
Example embodiment of the present utility model provides a kind of lighting device, is applicable to receive AC power to throw light on, and lighting device comprises light-emitting diode and light modulating device.Light modulating device is coupled to light-emitting diode, and with the driven for emitting lights diode, light modulating device comprises rectification unit, controller, bleeder circuit and electric pressure converter in order to the conversion AC power.Rectification unit in order to rectification AC power to produce first operating voltage.Bleeder circuit is coupled to first operating voltage, in order to produce the dividing potential drop corresponding to first operating voltage.Controller couples bleeder circuit, and the voltage of dividing potential drop is carried out integration obtaining average voltage level, and according to average voltage level output pulse wave width modulation signal.Electric pressure converter couples between controller and the light-emitting diode, adjust the driving voltage and the drive current of light-emitting diode in order to the driven for emitting lights diode and according to the pulse wave width modulation signal, its middle controller is more adjusted the pulse wave width modulation signal according to the feedback signal that electric pressure converter is exported.
Based on above-mentioned, lighting device provided by the utility model comprises light modulating device and light-emitting diode, and the lighting device with light-emitting diode can be directly installed on traditional lamp socket, and can carry out light modulation by traditional dimmer.Light modulating device can receive the AC power that dimmer provides, and provides stable driving voltage and drive current according to the pulse wave width modulation signal, light-emitting diode according to driving voltage and drive current to provide corresponding lightness stabilized.By this, not only can adjust the brightness of light-emitting diode, can avoid light-emitting diode to produce the situation of flicker because of the waveform change of AC power simultaneously.
For above-mentioned feature and advantage of the present utility model can be become apparent, example embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 is traditional lighting device.
Fig. 2 is the lighting device according to an example embodiment of the present utility model.
Fig. 3 is the oscillogram of AC power Vin.
Fig. 4 is the oscillogram of the first operating voltage Vm.
Fig. 5 is the oscillogram of filtering voltage Vf.
Fig. 6 is the oscillogram of pulse wave width modulation signal PWMS.
Fig. 7 is the lighting device according to another example embodiment of the present utility model.
Embodiment
Fig. 2 illustrates the lighting device according to an example embodiment of the present utility model.Please refer to Fig. 2, lighting device 200 comprises dimmer 104, light modulating device 202 and light-emitting diode 204.Light modulating device 202 comprises rectification unit 206, controller 208, electric pressure converter 210 and bleeder circuit 220.Dimmer 104 receives the input voltage Vs that power supplys 102 are provided, and according to turn-on condition with output AC power source Vin.In this enforcement demonstration example, dimmer 104 can adopt the three-pole AC switch, and (Tri-electrode AC switch TRIAC) implementing its function, but is not restricted to this.In addition, power supply 102 can be AC power of using in the city or the power supply that power supply unit provided, but is not restricted to this.
For the running of lighting device 200 in this enforcement demonstration example being described, the coherent signal when Fig. 3 to Fig. 6 illustrates lighting device 200 runnings or the oscillogram of voltage.Fig. 3 illustrates the oscillogram of AC power Vin.Please refer to Fig. 3, dimmer 104 utilizes the turn-on condition of adjusting three-pole AC switch TRAIC, uses duration of work (duty cycle) and the waveform of adjusting AC power Vin.In other words, dimmer 104 can be adjusted duration of work T1 and the T2 of AC power Vin in half cycle.Then, rectifier 212 can carry out rectification at AC power Vin, and the first operating voltage Vm is provided according to this, and wherein the oscillogram of the first operating voltage Vm as shown in Figure 4.
Further, please refer to Fig. 3 and Fig. 4, when the duration of work of AC power Vin and waveform change, the duration of work of the first operating voltage Vm and waveform also can change thereupon.In other words, the duration of work T3 of the first operating voltage Vm and T4 are corresponding to the conducting waveform of input voltage Vs, and T3 changes along with T1, and T4 then changes along with T2.In view of the above, rectification unit 206 provides to the driving voltage Vdr of light-emitting diode 204 and drive current Idr and also can change thereupon, and then the brightness of control light-emitting diode 204.In this enforcement demonstration example, rectifier 212 can adopt bridge rectifier (bridge rectifier), but is not restricted to this.
In addition, filter 214 is in order to receiving the first operating voltage Vm, and carries out filtering to provide filtering voltage Vf to electric pressure converter 210, and wherein the oscillogram of filtering voltage Vf as shown in Figure 5.Then, the pressurizer 216 voltage Vf that accepts filter, and the second operating voltage Vdc when controller 208 runnings are provided are in order to controller 208 runnings.
In this enforcement demonstration example, because the power of the first operating voltage Vm or voltage may surpass the load of controller 208, so in order to protect controller 208, the dividing potential drop Vd of the bleeder circuit 220 exportable first operating voltage Vm uses protection controller 208.Bleeder circuit 220 can comprise resistance R 1 and R2, one end of resistance R 1 couples rectifier 212, and in order to receive the first operating voltage Vm, the other end of resistance R 1 couples an end of resistance R 2, the other end of resistance R 2 is coupled to earth terminal Vss, and wherein resistance R 1 is exported dividing potential drop Vd with the common node of R2.
According to above-mentioned, the power supply when the second operating voltage Vdc provides controller 208 runnings, controller 208 can carry out integration to obtain average voltage level at dividing potential drop Vd.In view of the above, the feedback signal Vfb that controller 208 can utilize average voltage level and electric pressure converter 210 to be fed back adjusts pulse wave width modulation (pulse widthmodulation, PWM) signal PWMS.In the present embodiment, controller 208 can adopt ASIC(Application Specific Integrated Circuit) (ASIC) to realize implementing controller 208, but is not restricted to this.
Fig. 6 illustrates the oscillogram of pulse wave width modulation signal PWMS.Pulse wave width modulation signal PWMS has duration of work T5 and T6.According to above-mentioned, controller 208 can carry out integration at the dividing potential drop Vd of the first operating voltage Vm obtaining average voltage level, and according to average voltage level output pulse wave width modulation signal PWMS.
On the other hand, electric pressure converter 210 can be adjusted driving voltage Vdr and the brightness of drive current Idr with adjustment light-emitting diode 204 according to pulse wave width modulation signal PWMS.For example, when duration of work T5 and T6 were long more, electric pressure converter 210 exportable bigger driving voltage Vdr and drive current Idr made the brighter display of light-emitting diode 204.Work as duration of work T5 and T6 on the contrary more in short-term, less driving voltage Vdr and drive current Idr make that the brightness of light-emitting diode 204 is dark more.One end of light-emitting diode 204 is coupled to the output of electric pressure converter 210, and the other end is coupled to earth terminal Vss.In addition, it is comparatively stable to see through driving voltage Vdr and drive current Idr that electric pressure converter 210 provided, can be so that light-emitting diode 204 provide lightness stabilized, and the minimizing scintillation.
In this enforcement demonstration example, electric pressure converter 210 can be reduction voltage circuit, also can adopt buck-converter (buck converter) implementing its function, but be not restricted to this.In addition, electric pressure converter 210 exportable feedback signal Vfb are to controller 208, but controller 208 feedback loop reference signal Vfb and then adjustment pulse wave width modulation signal PWMS.Comprise driving voltage Vdr that electric pressure converter 210 is exported and the state of drive current Idr among this feedback signal Vfb.
According to the explanation of above-mentioned enforcement demonstration example, the user can see through the brightness of dimmer 104 and light modulating device 202 control light-emitting diodes 204.The user can see through dimmer 104 and adjust AC power Vin, makes AC power Vin have duration of work T1 and T2.Rectifier 212 carries out rectification at AC power Vin, and exports the first operating voltage Vm with duration of work T3 and T4, and wherein T3 changes along with T1, and T4 then changes along with T2.Then, controller 208 can carry out integration obtaining average voltage level at dividing potential drop Vd, and provides pulse wave width modulation signal PWMS to electric pressure converter 210 according to this.
At last, electric pressure converter 210 provides stable driving voltage Vdr and drive current Idr, can be so that light-emitting diode 204 provide stable brightness, and reduce scintillation.In view of the above, when the AC power Vin that is received when rectifier 212 changes, driving voltage Vdr that electric pressure converter 210 is provided and drive current Idr will change accordingly along with duration of work T5 and the T6 of pulse wave width modulation signal PWMS, so the brightness that light-emitting diode 204 provides also can change thereupon, and then reach the function of adjusting light-emitting diode 204 brightness.
Example embodiment of the present utility model also has other example embodiment to implement according to this except disclosing the enforcement according to this according to above-mentioned Fig. 2.Fig. 7 illustrates the lighting device according to another example embodiment of the present utility model.Please refer to Fig. 7, relevant composed component, voltage and signal can be described with reference to above-mentioned Fig. 2, repeat no more in this.Know clearly it, Fig. 7 and Fig. 2 are indivedual, and described embodiment difference is, electric pressure converter 210 receives the output first operating voltage Vm that comes from rectifier 212 among Fig. 7, and adjusts driving voltage Vdr and the brightness of drive current Idr with adjustment light-emitting diode 204 according to pulse wave width modulation signal PWMS.
In sum, lighting device provided by the utility model comprises light modulating device and light-emitting diode, and the lighting device with light-emitting diode can be directly installed on traditional lamp socket, and can carry out light modulation by traditional dimmer.Light modulating device carries out rectification at the AC power that dimmer provided, except carrying out integration to obtain average voltage level at the dividing potential drop of first operating voltage, and export the pulse wave width modulation signal to adjust electric pressure converter according to average voltage level, allow electric pressure converter can provide stable driving voltage and drive current to light-emitting diode, by this, not only can adjust the brightness of light-emitting diode, can avoid light-emitting diode to produce the situation of flicker because of the waveform change of AC power simultaneously.
Though the utility model discloses as above with example embodiment; right its is not in order to limit the utility model; have in the technical field under any and know the knowledgeable usually; in not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, so protection range of the present utility model is worked as with being as the criterion that claim was defined according to the content that above-mentioned example embodiment is instructed, disclosed or hints.
Claims (12)
1. a light modulating device is applicable to receive an AC power to drive a light-emitting diode, it is characterized in that this light modulating device comprises:
One rectification unit, in order to this AC power of rectification to produce one first operating voltage;
One bleeder circuit is coupled to this first operating voltage, in order to produce the dividing potential drop corresponding to this first operating voltage;
One controller is coupled to this bleeder circuit, the voltage of this dividing potential drop is carried out integration obtaining an average voltage level, and export a pulse wave width modulation signal according to this average voltage level; And
One electric pressure converter is coupled between this controller and this light-emitting diode, in order to drive this light-emitting diode and to adjust a driving voltage and a drive current of this light-emitting diode according to this pulse wave width modulation signal;
Wherein, the feedback signal more exported according to this electric pressure converter of this controller is adjusted this pulse wave width modulation signal.
2. light modulating device as claimed in claim 1 is characterized in that, this rectification unit comprises:
One rectifier, in order to this AC power of rectification to produce this first operating voltage;
One filter is coupled to the output of this rectifier, in order to export a filtering voltage to this electric pressure converter; And
One pressurizer is coupled to the output of this filter, in order to export one second operating voltage to this controller.
3. light modulating device as claimed in claim 1 is characterized in that, this rectification unit comprises:
One rectifier, in order to this AC power of rectification to produce this first operating voltage to this electric pressure converter;
One filter is coupled to the output of this rectifier, in order to export a filtering voltage; And
One pressurizer is coupled to the output of this filter, in order to export one second operating voltage to this controller.
4. light modulating device as claimed in claim 1 is characterized in that, this electric pressure converter is a reduction voltage circuit.
5. light modulating device as claimed in claim 1 is characterized in that, this controller is an ASIC(Application Specific Integrated Circuit).
6. light modulating device as claimed in claim 1 is characterized in that, this AC power is via the adjusted AC power of a dimmer.
7. a lighting device is applicable to receive an AC power to throw light on, and it is characterized in that this lighting device comprises:
One light-emitting diode; And
One light modulating device is coupled to this light-emitting diode, and in order to change this AC power to drive this light-emitting diode, this light modulating device comprises:
One rectification unit, in order to this AC power of rectification to produce one first operating voltage;
One bleeder circuit is coupled to this first operating voltage, in order to produce the dividing potential drop corresponding to this first operating voltage;
One controller is coupled to this bleeder circuit, the voltage of this dividing potential drop is carried out integration obtaining an average voltage level, and export a pulse wave width modulation signal according to this average voltage level; And
One electric pressure converter is coupled between this controller and this light-emitting diode, in order to drive this light-emitting diode and to adjust a driving voltage and a drive current of this light-emitting diode according to this pulse wave width modulation signal;
Wherein, the feedback signal more exported according to this electric pressure converter of this controller is adjusted this pulse wave width modulation signal.
8. lighting device as claimed in claim 7 is characterized in that, this rectification unit comprises:
One rectifier, in order to this AC power of rectification to produce this first operating voltage;
One filter is coupled to the output of this rectifier, in order to export a filtering voltage to this electric pressure converter; And
One pressurizer is coupled to the output of this filter, in order to export one second operating voltage to this controller.
9. lighting device as claimed in claim 7 is characterized in that, this rectification unit comprises:
One rectifier, in order to this AC power of rectification to produce this first operating voltage to this electric pressure converter;
One filter is coupled to the output of this rectifier, in order to export a filtering voltage; And
One pressurizer is coupled to the output of this filter, in order to export one second operating voltage to this controller.
10. lighting device as claimed in claim 7 is characterized in that, this electric pressure converter is a reduction voltage circuit.
11. lighting device as claimed in claim 7 is characterized in that, this controller is an ASIC(Application Specific Integrated Circuit).
12. lighting device as claimed in claim 7 is characterized in that, this AC power is via the adjusted AC power of a dimmer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201550412U CN201426199Y (en) | 2009-06-01 | 2009-06-01 | Light regulating device and lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201550412U CN201426199Y (en) | 2009-06-01 | 2009-06-01 | Light regulating device and lighting device |
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| Publication Number | Publication Date |
|---|---|
| CN201426199Y true CN201426199Y (en) | 2010-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201550412U Expired - Fee Related CN201426199Y (en) | 2009-06-01 | 2009-06-01 | Light regulating device and lighting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188852A (en) * | 2012-01-02 | 2013-07-03 | 隆达电子股份有限公司 | Lighting control circuit and lighting control method |
| WO2014082324A1 (en) * | 2012-11-29 | 2014-06-05 | 深圳市华星光电技术有限公司 | Light emitting diode voltage adjusting device and driving system having same |
| TWI656808B (en) * | 2017-12-22 | 2019-04-11 | 大陸商明緯（廣州）電子有限公司 | Dimming circuit |
-
2009
- 2009-06-01 CN CN2009201550412U patent/CN201426199Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188852A (en) * | 2012-01-02 | 2013-07-03 | 隆达电子股份有限公司 | Lighting control circuit and lighting control method |
| CN103188852B (en) * | 2012-01-02 | 2014-11-12 | 隆达电子股份有限公司 | Lighting control circuit and lighting control method |
| WO2014082324A1 (en) * | 2012-11-29 | 2014-06-05 | 深圳市华星光电技术有限公司 | Light emitting diode voltage adjusting device and driving system having same |
| TWI656808B (en) * | 2017-12-22 | 2019-04-11 | 大陸商明緯（廣州）電子有限公司 | Dimming circuit |
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| 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: 20100317 Termination date: 20160601 |