CN104284478A - Light-emitting diode lighting device having multiple driving stages - Google Patents
Light-emitting diode lighting device having multiple driving stages Download PDFInfo
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- CN104284478A CN104284478A CN201410323011.3A CN201410323011A CN104284478A CN 104284478 A CN104284478 A CN 104284478A CN 201410323011 A CN201410323011 A CN 201410323011A CN 104284478 A CN104284478 A CN 104284478A
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Abstract
The present invention discloses a light-emitting diode lighting device having multiple driving stages. A first driving stage includes a first luminescent device driven by a first current, a second luminescent device driven by a second current, a path-controller for conducting a third current, a first current controller for regulating the first current, and a second current controller for regulating the second current. The second driving stage includes a third current controller coupled in series to the first driving stage and configured to conduct and regulate a fourth current. When the path-controller is turned off, the third current is zero, and the fourth current is equal to the sum of the first current and the second current. When the path-controller is turned on, the first current, the second current, the third current and the fourth current is equal. Therefore, operational voltage range of the light-emitting diode lighting device can be expanded without causing image flicker and uniformity issue.
Description
Technical field
The present invention relates to a kind of light emitting diode illuminating apparatus possessing the multiple drive power stage, particularly relate to and a kind ofly possess the multiple drive power stage to provide large operating voltage range and flicker or the uneven light emitting diode illuminating apparatus of light can not be caused.
Background technology
Compared to traditional incandescent lamp bulb, light-emitting diode (light emitting diode, LED) have that power consumption is low, assembly life-span is long, volume is little, the lamp time need not be warmed up and the advantage such as reaction speed is fast, and can fit applications demand and make assembly that is minimum or array type.Except outdoor display, traffic signal light, various consumption electronic products, such as, outside the LCD Panel backlight of mobile phone, notebook computer or TV, light-emitting diode is also applied to various indoor and outdoor lighting device widely, to replace fluorescent tube or incandescent lamp bulb etc.
In the illumination application of AC power Direct driver, because light-emitting diode is a current drives assembly, its luminosity is directly proportional to the size of drive current, in order to reach the requirement of high brightness and brightness uniformity, often needs to use the light-emitting diode of many serial connections to provide enough light sources.In the driving method of existing light emitting diode illuminating apparatus, the light-emitting diode of serial connection can operating voltage range to increase with multiple drive power.Because the light-emitting diode aging speed of more normal conducting is very fast, easily affect uniform light degree.In addition, when rectified AC voltage is too low, may all serial connection light-emitting diode of conducting, so can cause flicker (flicker).Therefore, need a kind of can increasing can operating voltage range and flicker or the uneven light emitting diode illuminating apparatus of light can not be caused.
Summary of the invention
In view of the problem of above-mentioned prior art, the object of the present invention is to provide a kind of can increasing can operating voltage range and flicker or the uneven light emitting diode illuminating apparatus of light can not be caused.
For reaching above-mentioned object, the present invention discloses a kind of light emitting diode illuminating apparatus possessing the multiple drive power stage, and it comprises a first order and drives stage and a second level to drive the stage.The described first order drives the stage to comprise one first luminescence component, and it provides light source according to one first electric current; One second luminescence component, it provides light source according to one second electric current; One first current controller, is series at described first luminescence component, is used for regulating described first electric current to be no more than one first value to make the value of described first electric current; One second current controller, is series at described second luminescence component, is used for regulating described second electric current to be no more than one second value to make the value of described second electric current; And one first path controller, be used for conducting 1 the 3rd electric current, it comprises a first end, is coupled to ﹔ and one second end between described second luminescence component and described second current controller, is coupled to described first current controller.The described second level drives the stage to comprise one the 3rd current controller, is series at the described first order and drives the stage, is used for conducting and regulate one the 4th electric current to be no more than one the 3rd value to make the value of described 4th electric current.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a light emitting diode illuminating apparatus in the embodiment of the present invention.
Schematic diagram when Fig. 2 to Fig. 6 is each driving step operation of light emitting diode illuminating apparatus of the present invention.
Fig. 7 is the schematic diagram of embodiment of the present invention light emitting diode illuminating apparatus when operating.
Fig. 8 is the schematic diagram of a light emitting diode illuminating apparatus in other embodiment of the present invention.
Wherein, description of reference numerals is as follows:
100,200 light emitting diode illuminating apparatus
110 power supply circuits
112 bridge rectifiers
A
1~ A
n, B
1~ B
nlight-emitting device
CCA
1~ CCA
n, CCA
1' ~ CCA
n' first kind current controller
CCB
1~ CCB
nsecond Type current controller
CC
n+13rd type current controller
UNA
1~ UNA
n, UNA
1' ~ UNA
n' current sense and control unit
UNB
1~ UNB
ndetecting voltage and control unit
UN
n+1detecting and control unit
D
1~ D
npath controller
ST
1~ ST
n+1the driving stage
ISA
1~ ISA
n, ISA
1' ~ ISA
n', adjustable current source
ISB
1～ISB
N、IS
N+1
Embodiment
Fig. 1 is the schematic diagram of a light emitting diode illuminating apparatus 100 in the embodiment of the present invention.Light emitting diode illuminating apparatus 100 comprises a power supply circuit 110 and (N+1) level drives stage ST
1~ ST
n+1, wherein N is positive integer.Power supply circuit 110 can receive the alternating voltage VS of the positive negative cycle of a tool, and utilizes a bridge rectifier 112 to change the output voltage of alternating voltage VS in negative cycle, therefore can provide a rectified AC voltage V
aCstage ST is driven to drive (N+1) level
1~ ST
n+1, wherein rectified AC voltage V
aCvalue have cyclic variation along with the time.In other embodiments, power supply circuit 110 can receive any alternating voltage VS, utilize an AC-AC electric pressure converter to carry out voltage transitions, and utilize bridge rectifier 112 to carry out rectification to the alternating voltage VS after conversion, therefore can provide rectified AC voltage V
aCstage ST is driven to drive (N+1) level
1~ ST
n+1, wherein rectified AC voltage V
aCvalue have cyclic variation along with the time.It should be noted that the structure of power supply circuit 110 does not limit protection scope of the present invention.
1st grade drives stage ST to N level
1~ ST
nin each driving stage comprise multiple light-emitting device, a path controller, a first kind current controller and a Second Type current controller.(N+1) level drives stage ST
n+1comprise one the 3rd type current controller.Each first kind current controller comprises an adjustable current source and a current sense and control unit, each Second Type current controller comprises an adjustable current source and a detecting voltage and control unit, and each the 3rd type current controller comprises an adjustable current source and detecting and a control unit.
In order to clearly the present invention is described, specification uses following symbol to represent each assembly in light emitting diode illuminating apparatus 100 in full and in accompanying drawing.A
1~ A
nand B
1~ B
nrepresent driving stage ST respectively
1~ ST
nin corresponding light-emitting device.D
1~ D
nrepresent driving stage ST respectively
1~ ST
nin corresponding path controller.CCA
1~ CCA
nrepresent driving stage ST respectively
1~ ST
nin corresponding first kind current controller.CCB
1~ CCB
nrepresent driving stage ST respectively
1~ ST
nin corresponding Second Type current controller.CC
n+1represent driving stage ST
n+1in the 3rd type current controller.ISA
1~ ISA
nrepresent first kind current controller CCA respectively
1~ CCA
nin corresponding adjustable current source.ISB
1~ ISB
nrepresent Second Type current controller CCB respectively
1~ CCB
nin corresponding adjustable current source.IS
n+1represent the 3rd type current controller CC
n+1in adjustable current source.UNA
1~ UNA
nrepresent first kind current controller CCA respectively
1~ CCA
nin corresponding current sense and control unit.UNB
1~ UNB
nrepresent Second Type current controller CCB respectively
1~ CCB
nin corresponding detecting voltage and control unit.UN
n+1represent (N+1) level and drive stage ST
n+1in detecting and control unit.
In order to clearly the present invention is described, specification uses following symbol to represent correlated current and voltage in light emitting diode illuminating apparatus 100 in full and in icon.V
iN1~ V
iNNrepresent the 1st grade respectively and drive stage ST to (N+1) level
1~ ST
n+1cross-pressure.V
aK1~ V
aKNrepresent corresponding first kind current controller CCA respectively
1~ CCA
ncross-pressure.V
bK1~ V
bKNrepresent corresponding Second Type current controller CCB respectively
1~ CCB
ncross-pressure.V
cKrepresent the 3rd type current controller CC
n+1cross-pressure.I
aK1~ I
aKNrepresentative flows through corresponding first kind current controller CCA respectively
1~ CCA
nelectric current.I
bK1~ I
bKNrepresentative flows through corresponding Second Type current controller CCB respectively
1~ CCB
nelectric current.I
a1~ I
aNrepresentative flows through corresponding light-emitting device A respectively
1~ A
nelectric current.I
b1~ I
bNrepresentative flows through corresponding light-emitting device B respectively
1~ B
nelectric current.I
d1~ I
dNrepresentative flows through corresponding path controller D respectively
1~ D
nelectric current.I
sUM1~ I
sUMNrepresentative flows through corresponding driving stage ST respectively
1~ ST
nelectric current.The total current flowing through light emitting diode illuminating apparatus 100 can by I
sUMNrepresent.
Stage ST is driven to N level in the first order
1~ ST
nin, current sense and control unit UNA
1~ UNA
nbe connected serially to corresponding light-emitting device A respectively
1~ A
nwith corresponding adjustable current source ISA
1~ ISA
n, and detecting voltage and control unit UNB
1~ UNB
nbe connected serially to corresponding light-emitting device B respectively
1~ B
nbe parallel to corresponding adjustable current source ISB respectively
1~ ISB
n.Current sense and control unit UNA
1~ UNA
ncan respectively according to electric current I
aK1~ I
aKNregulate adjustable current source ISA respectively
1~ ISA
nvalue.Detecting voltage and control unit UNB
1~ UNB
ncan respectively according to voltage V
bK1~ V
bKNregulate adjustable current source ISB respectively
1~ ISB
nvalue.
Stage ST is driven in (N+1) level
n+1in, adjustable current source IS
n+1be series at the 1st grade and drive stage ST to N level
1~ ST
n.In one first configuration, the 3rd type current controller CC
n+1detecting and control unit UN
n+1adjustable current source IS can be series at
n+1, be used for according to electric current I
sUMNregulate adjustable current source IS
n+1value.In one second configuration, the 3rd type current controller CC
n+1detecting and control unit UN
n+1adjustable current source IS can be parallel to
n+1, be used for according to voltage V
cKregulate adjustable current source IS
n+1value.Embodiment shown in Fig. 1 adopts the first configuration, but does not limit protection scope of the present invention.
In embodiments of the present invention, each light-emitting device A
1~ A
nand B
1~ B
na light-emitting diode can be comprised, or multiple serial connection, parallel connection or composition array light-emitting diode.Fig. 1 shows the framework adopting multiple serial connection light-emitting diode, it can comprise multiple single interface light-emitting diode (single-junction LED), multiple multiple solutions high-voltage LED (multi-junction high-voltage LED), or the combination in any of dissimilar light-emitting diode.But, light-emitting device A
1~ A
nand B
1~ B
nthe light-emitting diode kind adopted or configuration do not limit protection scope of the present invention.
In embodiments of the present invention, each path controller D
1~ D
ncan adopt a diode, or other possesses the assembly of similar functions.But, path controller D
1~ D
nkind do not limit protection scope of the present invention.
Fig. 2 to Fig. 5 shows the first order and drives stage ST to N level
1~ ST
nschematic diagram during running.Because the first order drives stage ST to N level
1~ ST
nfunction mode is identical, drives stage ST in Fig. 2 to Fig. 5 with the first order
1explain, wherein Fig. 2 describes first kind current controller CCA
1current-voltage (I-V) characteristic, Fig. 3 describes Second Type current controller CCB
1i-E characteristic, Fig. 4 describe the first order drive stage ST
1equivalent electric circuit when operating in different times, and Fig. 5 describes first order driving stage ST
1i-E characteristic.Fig. 6 shows (N+1) level and drives stage ST
n+1middle current controller CC
n+1schematic diagram during running.V
dROPA, V
dROPBand V
dROPCrepresent conducting first kind current controller CCA respectively
1, Second Type current controller CCB
1with the 3rd type current controller CC
n+1required dropout voltage (dropout voltage).V
oFFA, V
oFFBand V
oNBrepresent first kind current controller CCA
1or Second Type current controller CCB
1be used for judging whether the critical voltage switching operating mode.I
sETA1, V
sETB1and V
sETCfor constant, represent first kind current controller CCA respectively
1, Second Type current controller CCB
1with the 3rd type current controller CC
n+1cut-off current.Arrow R indicates voltage V
aK1, V
bK1or V
cKramp-up cycle, and arrow L indicates voltage V
aK1, V
bK1or V
cKdecline cycle.
As shown in Figure 2, at voltage V
aK1ramp-up cycle and work as 0<V decline cycle
aK1<V
dROPAtime, first kind current controller CCA
1conducting not yet completely, now can operate, make electric current I as voltage controlled component under a linear model
aK1can along with voltage V
aK1in specific change.For example, if first kind current controller CCA
1make with metal-oxide-semiconductor (MOS) (metal-oxide-semiconductor, MOS) transistor, electric current I
aK1with voltage V
aK1between relation can be relevant to electric current--voltage characteristic when MOS transistor operates in linear zone.
At voltage V
aK1ramp-up cycle and work as V decline cycle
aK1>V
dROPAtime, electric current I
aK1rise to the first order and drive stage ST
1cut-off current I
sETA1, now first kind current controller CCA
1a constant current mode can be switched to and operate as flow restricter, and current sense and control unit UNA
1can by electric current I
aK1value strangulation at I
sETA1.For example, if electric current I
d1become large, current sense and control unit UNA
1adjustable current source ISA can be reduced accordingly
1zhi ﹔ in like manner, if electric current I
d1diminish, current sense and control unit UNA
1adjustable current source ISA can be increased accordingly
1value.Therefore, flow through the first order and drive stage ST
1total current I
aK1(=I
d1+ ISA
1) can fixed value I be maintained
sETA1, and can not along with voltage V
aK1and change.
At voltage V
aK1ramp-up cycle in electric current I
d1rise to I
sETA1before, current sense and control unit UNA
1adjustable current source ISA can be opened
1, now first kind current controller CCA
1can operate under constant current mode, make electric current I
aK1fixed value I can be maintained
sETA1.Work as electric current I
d1rise to I
sETA1time, current sense and control unit UNA
1adjustable current source ISA can be closed
1, now first kind current controller CCA
1a cut-off mode can be switched to, make electric current I
aK1along with electric current I
d1and increase.
At voltage V
aK1decline cycle in electric current I
d1be down to I
sETA1before, current sense and control unit UNA
1adjustable current source ISA can be closed
1, now first kind current controller CCA
1can operate under cut-off mode, make electric current I
aK1along with electric current I
d1and reduce.Work as electric current I
d1be down to I
sETA1time, current sense and control unit UNA
1adjustable current source ISA can be opened
1, now first kind current controller CCA
1can operate under constant current mode, make electric current I
aK1fixed value I can be maintained
sETA1.
As shown in Figure 3, at voltage V
bK1ramp-up cycle and work as 0<V decline cycle
bK1<V
dROPBtime, Second Type current controller CCB
1conducting not yet completely, now can operate, make electric current I as voltage controlled component under linear model
bK1can along with voltage V
bK1in specific change.For example, if Second Type current controller CCB
1make with MOS transistor, electric current I
bK1with voltage V
bK1between relation can be relevant to electric current--voltage characteristic when MOS transistor operates in linear zone.
At voltage V
bK1ramp-up cycle work as V
bK1>V
dROPBtime, electric current I
bK1rise to I
sETB1, now Second Type current controller CCB
1can constant current mode be switched to and operate as flow restricter, and detecting voltage and control unit UNB
1can by electric current I
bK1value strangulation at I
sETB1.
At voltage V
bK1ramp-up cycle work as V
bK1>V
oFFBtime, detecting voltage and control unit UNB
1adjustable current source ISB can be closed
1, now Second Type current controller CCB
1can cut-off mode be switched to, that is similarly be open circuit assembly.At voltage V
bK1decline cycle work as V
bK1<V
oNBtime, detecting voltage and control unit UNB
1adjustable current source ISB can be opened
1, now Second Type current controller CCB
1operate under switching to constant current mode, make electric current I
bK1fixed value I can be maintained
sETB1.Critical voltage V
oNBvalue can be more than or equal to critical voltage V
oFFBvalue.In one embodiment, the present invention can provide a magnetic hysteresis band (hysteresis band), its bandwidth (V
oNB-V
oFFB) non-vanishing, so can avoid Second Type current controller CCB
1because of voltage V
bK1fluctuate and switch operating mode too continually.
As shown in Fig. 4 left, when the first order drives stage ST
1at V1<V
iN1in one first period of <V2 during running, light-emitting device A
1light-emitting device B can be parallel to
1.As shown in Fig. 4 right, when the first order drives stage ST
1at V
iN1in one second period of >V3 during running, light-emitting device A
1light-emitting device B can be series at
1.
As shown in Figure 5, voltage V is worked as at ramp-up cycle
iN1time still low, light-emitting device A
1, light-emitting device B
1with path controller D
1still in closed condition.At ramp-up cycle as voltage V
iN1value rise to a cut-in voltage V
a1, and cut-in voltage V
a1value be conducting light-emitting device A
1required cut-in voltage (cut-in voltage) and conducting first kind current controller CCA
1during the totalling of required cut-in voltage, first kind current controller CCA
1with light-emitting device A
1can be unlocked, make electric current I
a1can along with voltage V
iN1increase gradually, until rise to I
sETA1till.At ramp-up cycle as voltage V
iN1value rise to a cut-in voltage V
b1, and cut-in voltage V
b1value be conducting light-emitting device B
1required cut-in voltage and conducting Second Type current controller CCB
1during the totalling of required cut-in voltage, Second Type current controller CCB
1with light-emitting device B
1can be unlocked, make electric current I
b1can along with voltage V
iN1increase gradually, until rise to I
sETB1till.Due to path controller D
1still in closed condition, electric current I
sUM1value be electric current I
a1and electric current I
b1totalling, wherein electric current I
a1by first kind current controller CCA
1regulate, and electric current I
b1by Second Type current controller CCB
1regulate.Cut-in voltage V
a1with cut-in voltage V
b1can be identical value or different value.Change, as voltage V
iN1value rise to voltage V1 after, electric current I
sUM1start to increase, wherein voltage V1 is cut-in voltage V
a1with cut-in voltage V
b1middle smaller.
At ramp-up cycle as voltage V
iN1value rise to V2 and make V
bK1=V
oFFBtime, Second Type current controller CCB
1cut-off mode can be switched to, therefore electric current I
a1path controller D can be directed to
1, and then open path controller D
1.Now, electric current I
sUM1and electric current I
b1value identical, wherein electric current I
a1and electric current I
b1all by first kind current controller CCA
1regulate.Along with electric current I
a1flow through path controller D
1, electric current I
d1can along with voltage V
iN1increase gradually, now first kind current controller CCA
1adjustable current source ISA can be reduced accordingly
1value, make total current I
sUM1still maintain fixed value I
sETA1.At ramp-up cycle as voltage V
iN1value when rising to V3, adjustable current source ISA
1value be down to 0, and first kind current controller CCA
1cut-off mode can be switched to, now electric current I
sUM1the stage can be driven to regulate by next stage.
As shown in Figure 6, at voltage V
cKramp-up cycle and work as 0<V decline cycle
cK1<V
dROPCtime, the 3rd type current controller CC
n+1conducting not yet completely, now can operate, make electric current I as voltage controlled component under linear model
cKcan along with voltage V
cK1in specific change.For example, if the 3rd type current controller CC
n+1make with MOS transistor, electric current I
cK1with voltage V
cK1between relation can be relevant to electric current--voltage characteristic when MOS transistor operates in linear zone.At voltage V
cKramp-up cycle work as V
cK>V
dROPCtime, electric current I
cK1rise to I
sETC1, now the 3rd type current controller CC
n+1can constant current mode be switched to and operate as flow restricter.
Fig. 7 is the schematic diagram of embodiment of the present invention light emitting diode illuminating apparatus 100 when operating.In order to illustration purpose, Fig. 7 shows the embodiment of N=2.As previously mentioned, due to voltage V
iN1~ V
iN2, V
aK1~ V
aK2, V
bK1~ V
bK2and V
cKbe relevant to rectified AC voltage V
aC, and rectified AC voltage V
aCvalue have cyclic variation along with the time, therefore to comprise time point t
0~ t
11one-period explain, wherein time point t
0~ t
5between be included in rectified AC voltage V
aCramp-up cycle, and time point t
6~ t
11between be included in rectified AC voltage V
aCdecline cycle.
At time point t
0before, rectified AC voltage V
aCvalue very little, now voltage V
iN1~ V
iN2value be still not enough to conducting light-emitting device A
1~ A
2, light-emitting device B
1~ B
2or current controller CCA
1~ CCA
2, CCB
1~ CCB
2and CC
3.Therefore, the first order drives stage ST to the third level
1~ ST
3all operate under cut-off mode, and the total current I of light emitting diode illuminating apparatus 100
sUMNbe 0.
At time point t
0and t
1between, the first order drives stage ST to the third level
1~ ST
3all operate under linear model, now the total current I of light emitting diode illuminating apparatus 100
sUMNcan along with rectified AC voltage V
aCin specific change.At time point t
1and t
2between, the first order drives stage ST
1operate under switching to constant current mode, make electric current I
sUM1fixed value (I can be maintained
sUM1=I
sETA1+ I
sETB1), and can not along with rectified AC voltage V
aCand change.Therefore, at time point t
0and t
2between, the total current I of light emitting diode illuminating apparatus 100
sUMNby first kind current controller CCA
1with Second Type current controller CCB
1regulate.
At time point t
2and t
3between, the first order drives stage ST
1operate under switching to cut-off mode, and the second level and the third level drive stage ST
2~ ST
3still operate under linear model, the now total current I of light emitting diode illuminating apparatus 100
sUMNcan along with rectified AC voltage V
aCin specific change.At time point t
3and t
4between, the second level drives stage ST
2operate under switching to constant current mode, make electric current I
sUM2fixed value (I can be maintained
sUM2=I
sETA2+ I
sETB2), and can not along with rectified AC voltage V
aCand change.Therefore, at time point t
2and t
4between, the total current I of light emitting diode illuminating apparatus 100
sUMNby first kind current controller CCA
2with Second Type current controller CCB
2regulate.
At time point t
4and t
5between, the second level drives stage ST
2operate under switching to cut-off mode, and the third level drives stage ST
3still operate under linear model, the now total current I of light emitting diode illuminating apparatus 100
sUMNcan along with rectified AC voltage V
aCin specific change.At time point t
5and t
6between, the third level drives stage ST
3operate under switching to constant current mode, make electric current I
sUMNfixed value (I can be maintained
sUMN=I
sETC), and can not along with rectified AC voltage V
aCand change.Therefore, at time point t
4and t
6between, the total current I of light emitting diode illuminating apparatus 100
sUMNby the 3rd type current controller CC
3regulate.
Interval t in ramp-up cycle
0~ t
1, t
1~ t
2, t
2~ t
3, t
3~ t
4and t
4~ t
5correspond to the interval t within decline cycle respectively
10~ t
11, t
9~ t
10, t
8~ t
9, t
7~ t
8and t
6~ t
7.Therefore, the running of light emitting diode illuminating apparatus 100 within decline cycle and the running in ramp-up cycle similar, separately do not add at this and repeat.
In embodiments of the present invention, the cut-off current of light emitting diode illuminating apparatus 100 can have Xia row Guan Xi ﹕ (I
sETA1+ I
sETB1) < (I
sETA2+ I
sETB2) <I
sETC.
Following chart has arranged the first order and has driven stage ST to the third level
1~ ST
3different operating mode and running period, wherein pattern 1 represents linear model, and pattern 2 represents constant current mode, and mode 3 represents cut-off mode.Correspond respectively to the first order in Fig. 4 in period 1 and period 2 and drive stage ST
1first period of equivalent electric circuit and the second period.
Chart
Fig. 8 is the schematic diagram of a light emitting diode illuminating apparatus 200 in other embodiment of the present invention.Compared to the light emitting diode illuminating apparatus 100 shown in Fig. 1, light emitting diode illuminating apparatus 200 comprises a power supply circuit 110 equally and (N+1) level drives stage ST
1~ ST
n+1, wherein N is positive integer.Different be in, the 1st grade of light emitting diode illuminating apparatus 200 drives stage ST to N level
1~ ST
nin each driving stage comprise multiple light-emitting device, a path controller, and two first kind current controllers.Each first kind current controller comprises an adjustable current source and a current sense and control unit, and I-E characteristic during its running also as shown in Figure 2.By CCA
1~ CCA
nin the first kind current controller of representative, current sense and control unit UNA
1~ UNA
nbe connected serially to corresponding light-emitting device A respectively
1~ A
nwith corresponding adjustable current source ISA
1~ ISA
n, can respectively according to electric current I
aK1~ I
aKNregulate adjustable current source ISA respectively
1~ ISA
nvalue.By CCA
1' ~ CCA
n' in the first kind current controller that represents, current sense and control unit UNA
1' ~ UNA
n' be connected serially to corresponding light-emitting device B respectively
1~ B
nwith corresponding adjustable current source ISA
1' ~ ISA
n', can respectively according to electric current I
bK1~ I
bKNregulate adjustable current source ISA respectively
1' ~ ISA
n' value.The overall operation of light emitting diode illuminating apparatus 200 also as shown in Figure 7.
By the framework in above-mentioned multiple drive power stage, the present invention can open all light-emitting devices in light emitting diode illuminating apparatus simultaneously, and utilizes one or more corresponding current controller flexibly to regulate overall current.Therefore, what the present invention can increase light emitting diode illuminating apparatus can operating voltage range, and can not cause flicker or the uneven phenomenon of light.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. possess the light emitting diode illuminating apparatus in multiple drive power stage, it is characterized in that, comprising:
One first order drives the stage, and it comprises:
One first luminescence component, it provides light source according to one first electric current;
One second luminescence component, it provides light source according to one second electric current;
One first current controller, is series at described first luminescence component, is used for regulating described first electric current to be no more than one first value to make the value of described first electric current;
One second current controller, is series at described second luminescence component, is used for regulating described second electric current to be no more than one second value to make the value of described second electric current; And
One first path controller, is used for conducting 1 the 3rd electric current, and ﹕ drawn together by its bag
One first end, to be coupled between described second luminescence component and described second current controller Zhi ﹔ and
One second end, be coupled to described first Current Control Qi ﹔ and
One second level drives the stage, and it comprises:
One the 3rd current controller, be series at the described first order drive the stage, be used for conducting and regulate one the 4th electric current be no more than one the 3rd value to make the value of described 4th electric current.
2. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that:
At a ramp-up cycle of a rectified AC voltage or when being not more than first voltage when the cross-pressure of described first current controller in the decline cycle, described first current controller operates described first electric current is changed along with the cross-pressure of described first current controller under a first mode;
At described ramp-up cycle or when being not more than described first value when described 3rd electric current in described decline cycle, described first current controller maintains described first value at one second mode to make described first electric current; And
At described ramp-up cycle or when exceeding described first value when described 3rd electric current in described decline cycle, be closed condition when described first current controller is and operates under a three-mode.
3. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that:
At a ramp-up cycle of a rectified AC voltage or when being not more than a tertiary voltage when the cross-pressure of described second current controller in the decline cycle, described second current controller operates described second electric current is changed along with the cross-pressure of described second current controller under a first mode;
In described ramp-up cycle when the cross-pressure of described second current controller exceedes described tertiary voltage but is not more than the 4th voltage, described second current controller maintains described second value at one second mode to make described second electric current;
In described ramp-up cycle when the cross-pressure of described second current controller exceedes described 4th voltage, be closed condition when described second current controller is and operates under a three-mode.
4. light emitting diode illuminating apparatus as claimed in claim 3, is characterized in that:
Within described decline cycle when the cross-pressure of described second current controller exceedes described tertiary voltage but is not more than the 5th voltage, described second current controller operates in the second mode to make described second electric current maintain described second value; And
Described 5th voltage is more than or equal to described 4th voltage.
5. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that:
At a ramp-up cycle of a rectified AC voltage or when being not more than the 6th voltage when the cross-pressure of described 3rd current controller in the decline cycle, described 3rd current controller operates described 4th electric current is changed along with the cross-pressure of described 3rd current controller under a first mode; And
At described ramp-up cycle or when exceeding described 6th voltage when the cross-pressure of described 3rd current controller in described decline cycle, described 3rd current controller maintains described 3rd value at one second mode to make described 4th electric current.
6. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that, described the
One current controller comprises:
One first adjustable current source, be used for conducting 1 the 5th electricity stream ﹔ and
One first detecting and control unit, is used for regulating according to described first electric current or described 3rd electric current the value of described 5th electric current, described first detecting and control unit Bao Kuo ﹕
One first end, be coupled to described second end of described first path controller and the described 2nd end ﹔ of described first adjustable current source and
One second end, is coupled to the first luminescence component.
7. light emitting diode illuminating apparatus as claimed in claim 1, it is characterized in that, described second current controller comprises:
One second adjustable current source, be used for conducting 1 the 6th electricity stream ﹔ and
One second detecting and control unit, is parallel to described second adjustable current source, is used for regulating according to the cross-pressure of described second current controller the value of described 6th electric current.
8. light emitting diode illuminating apparatus as claimed in claim 1, Qi Te levies Yu ﹕
Described first current controller comprises:
One first adjustable current source, be used for conducting 1 the 5th electricity stream ﹔ and
One first detecting and control unit, is used for regulating according to described first electric current or described 3rd electric current the value of described 5th electric current, described first detecting and control unit Bao Kuo ﹕
One first end, be coupled to described second end of described first path controller and the described 2nd end ﹔ of described first adjustable current source and
One second end, be coupled to the one light group part ﹔ and
Described second current controller comprises:
One second adjustable current source, be used for conducting 1 the 6th electricity stream ﹔ and
One second detecting and control unit, is series at described second adjustable current source, is used for according to described first electric current or flows through the described first order and drive the total current in stage to regulate the value of described 6th electric current.
9. light emitting diode illuminating apparatus as claimed in claim 1, it is characterized in that, described 3rd current controller comprises:
One the 3rd adjustable current source, to be used for described in conducting the 4th electricity stream ﹔ and
One the 3rd detecting and control unit, is series at described 3rd adjustable current source, is used for the 3rd adjustable current source according to described 4th Current Control.
10. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that, separately comprises a third level and drives the stage, and be coupled to the described first order and drive between stage and the described second level driving stage, the described third level drives the stage to comprise:
One the 3rd luminescence component, it provides light source according to one the 7th electric current;
One the 4th luminescence component, it provides light source according to one the 8th electric current;
One the 4th current controller, is series at described 3rd luminescence component, is used for regulating described 7th electric current to be no more than one the 4th value to make the value of described 7th electric current;
One the 5th current controller, is series at described 4th luminescence component, is used for regulating described 8th electric current to be no more than one the 5th value to make the value of described 8th electric current;
One second path controller, is used for conducting 1 the 9th electric current, Qi Bao Kuo ﹕
One first end, to be coupled between described 4th luminescence component and described 5th current controller Zhi ﹔ and
One second end, is coupled to described 4th current controller.
11. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that, separately comprise a power supply circuit, are used to provide and drive described first luminescence component and the rectified AC voltage needed for described second luminescence component.
12. light emitting diode illuminating apparatus as claimed in claim 11, it is characterized in that, described power supply circuit comprises an AC-AC electric pressure converter.
13. light emitting diode illuminating apparatus as claimed in claim 1, it is characterized in that, described first path controller comprises a diode.
14. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that:
When described first path controller is closed condition, described first luminescence component be parallel to described second light group part ﹔ and
When described first path controller is opening, described first luminescence component is series at described second luminescence component.
15. light emitting diode illuminating apparatus as claimed in claim 1, is characterized in that:
When described first path controller is in state when closing, the value of described 3rd electric current is 0, and the value of described 4th electric current be the total of the value of described first electric current and described second electric current and ﹔ and
When described first path controller is opening, described first electric current, described second electric current, described 3rd electric current and the identical value of described 4th electric current tool.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361844438P | 2013-07-10 | 2013-07-10 | |
| US61/844,438 | 2013-07-10 | ||
| US14/267,916 | 2014-05-02 | ||
| US14/267,916 US9084315B2 (en) | 2013-07-10 | 2014-05-02 | Light-emitting diode lighting device having multiple driving stages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104284478A true CN104284478A (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410323011.3A Pending CN104284478A (en) | 2013-07-10 | 2014-07-08 | Light-emitting diode lighting device having multiple driving stages |
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Cited By (1)
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| US10803788B2 (en) | 2018-11-16 | 2020-10-13 | Au Optronics Corporation | Driving circuit for a light-emitting element |
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Application publication date: 20150114 |