CN104349544B - LED drive device and ligthing paraphernalia - Google Patents
LED drive device and ligthing paraphernalia Download PDFInfo
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Abstract
LED drive device and ligthing paraphernalia are provided.LED drive device is configured to that by the way that input electric power is transformed into direct current power and direct current power is supplied into multiple LED light sources, to be driven to multiple LED/light sources.LED drive device possesses：Adjustment portion, it adjusts the direct current power to be powered to multiple LED light sources respectively, using the direct current power after adjusting respectively as to the respective output of multiple LED/light sources；And control unit.Control unit is configured to when for detecting that the abnormal abnormity detection portion of multiple LED/light sources detects the exception of a part for multiple LED/light sources respectively, the control in portion is adjusted so that adjustment portion stops to a part of output, and adjustment portion is increased to the output of the remainder of multiple LED/light sources.
Description
Technical field
The present invention relates to a kind of LED drive device and ligthing paraphernalia.
Background technology
Japanese Unexamined Patent Publication No 2011-154841 (hereinafter referred to as " document 1 ") disclose a kind of LED lamp devices.
Device described in document 1 possesses DC/DC converters, switch control portion, PWM (Pulse Width Modulation：Pulsewidth is adjusted
System) controller and abnormity detection portion.Switch control portion is selected two LED/light sources and the connection of the output end of DC/DC converters
Switch over control to one property.The LED/light source of output end of the PWM controller with being connected to DC/DC converters by switch control portion
Correspondingly increase or decrease the output of DC/DC converters.Abnormity detection portion detect respectively two LED/light sources exception (short circuit,
It is non-loaded etc.), stop powering to the LED/light source for detecting an abnormal side.
In the device described in document 1, by stopping extinguishing it to generating abnormal LED/light source and power, by
This easily recognizes that the LED/light source generates exception.
In addition, in the LED drive device being driven as the device described in document 1 to multiple LED/light sources, depositing
In following situation：When some LED/light source generates abnormal, (make the LED light if being only off the driving of the LED/light source
Extinguish in source) then produce undesirable condition.For example, in the case where LED/light source is used in road lighting, the light source of tunnel illumination, by
The illumination for the bottom line for extinguishing and being likely to result in needed for being difficult to ensure that in a part for multiple LED/light sources.
The content of the invention
The present invention be in view of above-mentioned problem and complete, its object is to suppress to generate exception in a part of LED/light source
In the case of illumination decline.
The LED drive device (A1, A2) of the present invention is configured to by input electric power being transformed into direct current power and will be above-mentioned
Direct current power is supplied to multiple LED/light sources (B1, B2) side, to be driven to above-mentioned multiple LED/light sources (B1, B2).Above-mentioned LED
Drive device (A1, A2) possesses abnormity detection portion (3), adjustment portion (C) and control unit (D).Above-mentioned abnormity detection portion (3) is constituted
To detect the exception of above-mentioned multiple LED/light sources (B1, B2) respectively.Above-mentioned adjustment portion (C) is configured to adjust respectively will be to above-mentioned more
The above-mentioned direct current power of individual LED/light source (B1, B2) side supply, using the direct current power after adjusting respectively as to above-mentioned multiple
LED/light source (B1, B2) respective output.Above-mentioned control unit (D) is configured to detect in above-mentioned abnormity detection portion (3) above-mentioned multiple
During the exception of a part for LED/light source (B1, B2), carry out the control of above-mentioned adjustment portion (C) so that above-mentioned adjustment portion (C) to this one
Partial output stops, and above-mentioned adjustment portion (C) is increased to the output of the remainder of above-mentioned multiple LED/light sources (B1, B2)
Greatly.
In one embodiment, above-mentioned LED drive device (A1) possesses ac/dc transformation component (4).Above-mentioned exchange/
DC converting portion (4) is configured to the alternating electromotive force as above-mentioned input electric power being transformed to direct current power.Above-mentioned adjustment portion (C) tool
Standby multiple DC/DC conversion portions (1,2), the plurality of DC/DC conversion portion (1,2) is in above-mentioned ac/dc transformation component (4)
Output end be connected in parallel.Above-mentioned multiple LED/light sources (B1, B2) one by one with above-mentioned multiple DC/DC conversion portions (1,2)
Multiple output end connection.Above-mentioned multiple DC/DC conversion portions (1,2) are respectively structured as from above-mentioned ac/dc
The above-mentioned direct current power of transformation component (4) is transformed to direct current power corresponding with the control of above-mentioned control unit (D).
In one embodiment, above-mentioned LED drive device (A2) possesses multiple ac/dc transformation components (4A, 4B).On
Multiple ac/dc transformation components (4A, 4B) are stated to be respectively structured as the alternating electromotive force as above-mentioned input electric power being transformed to direct current
Electric power.Above-mentioned adjustment portion (C) possesses multiple DC/DC conversion portions (1,2), and the plurality of DC/DC conversion portion (1,2) is one by one
Ground is connected with multiple output end of above-mentioned multiple ac/dc transformation components (4A, 4B).Above-mentioned multiple LED/light sources (B1, B2) by
Multiple output end with above-mentioned multiple DC/DC conversion portions (1,2) are connected individually.Above-mentioned multiple DC/DC conversion portions
(1,2) are configured to each direct current power from above-mentioned multiple ac/dc transformation components (4A, 4B) being transformed to and above-mentioned control
The corresponding direct current power of control in portion (D).
In one embodiment, above-mentioned control unit (D) is configured to cause in the control for carrying out above-mentioned adjustment portion (C) above-mentioned
Adjustment portion (C) is respective more specified than above-mentioned multiple LED/light sources (B1, B2) to the value of the output of above-mentioned multiple LED/light sources (B1, B2)
In the case that value is low, when the exception of a part of above-mentioned multiple LED/light sources (B1, B2) is detected in above-mentioned abnormity detection portion (3),
Carry out the control of above-mentioned adjustment portion (C) so that a part from above-mentioned adjustment portion (C) to above-mentioned multiple LED/light sources (B1, B2) it is defeated
Go out to stop, and make above-mentioned adjustment portion (C) to the value of the output of the remainder of above-mentioned multiple LED/light sources (B1, B2) close to upper
State rated value.
In one embodiment, above-mentioned control unit (D) is configured to cause in the control for carrying out above-mentioned adjustment portion (C) above-mentioned
Adjustment portion (C) is respective more specified than above-mentioned multiple LED/light sources (B1, B2) to the value of the output of above-mentioned multiple LED/light sources (B1, B2)
In the case that value is low, when the exception of a part of above-mentioned multiple LED/light sources (B1, B2) is detected in above-mentioned abnormity detection portion (3),
Carry out the control of above-mentioned adjustment portion (C) so that a part from above-mentioned adjustment portion (C) to above-mentioned multiple LED/light sources (B1, B2) it is defeated
Go out stop, and make value from above-mentioned adjustment portion (C) to the output of the remainder of above-mentioned multiple LED/light sources (B1, B2) with it is above-mentioned
Rated value is consistent.
In one embodiment, above-mentioned multiple LED/light sources (B1, B2) include the first LED/light source and the second LED/light source
(B1、B2).Above-mentioned control unit (D) is configured to cause above-mentioned adjustment portion (C) to above-mentioned the in the control for carrying out above-mentioned adjustment portion (C)
The value of the output of one LED/light source and above-mentioned second LED/light source (B1, B2) is mutually the same and than above-mentioned first LED/light source and above-mentioned
In the case that second LED/light source (B1, B2) respective rated value is low, above-mentioned first LED is detected in above-mentioned abnormity detection portion (3)
During the exception of one side of light source and above-mentioned second LED/light source (B1, B2), the control of above-mentioned adjustment portion (C) is carried out so that above-mentioned tune
The output of the side of whole (C) into above-mentioned first LED/light source and above-mentioned second LED/light source (B1, B2) stops, and makes above-mentioned
The value of the output of the opposing party of adjustment portion (C) into above-mentioned first LED/light source and above-mentioned second LED/light source (B1, B2) turns into should
Output 2 times of value or 2 times of the value exceed above-mentioned rated value in the case of make the output value turn into the rated value.
The ligthing paraphernalia of the present invention possesses above-mentioned LED drive device (A1, A2), driven by above-mentioned LED drive device (A1, A2)
Dynamic multiple LED/light sources (B1, B2) and the appliance body (70) at least keeping above-mentioned multiple LED/light sources (B1, B2).
The LED drive device and ligthing paraphernalia of the present invention has the effect that：Control unit controls dimming section so that adjustment
Portion (C) is not detected the output increase of abnormal LED/light source into multiple LED/light sources by abnormity detection portion, therefore, it is possible to suppress
Illumination in the case where a part of LED/light source generates exception declines.
Brief description of the drawings
Fig. 1 is the circuit diagram for the embodiment for representing LED drive device involved in the present invention.
Fig. 2 is the circuit diagram of the abnormity detection portion of above-mentioned LED drive device.
Fig. 3 is the circuit diagram for another embodiment for representing LED drive device involved in the present invention.
Fig. 4 is the circuit diagram for the another embodiment for representing LED drive device involved in the present invention.
Fig. 5 A~Fig. 5 C is the oscillogram of the action specification of above-mentioned LED drive device.
Fig. 6 is the circuit diagram for the other structures for representing the first DC/DC converters in above-mentioned LED drive device.
Fig. 7 A and Fig. 7 B represent the embodiment of ligthing paraphernalia involved in the present invention, and Fig. 7 A is side view, Fig. 7
B be bottom view.
Embodiment
Hereinafter, the LED drive device in embodiment involved by present invention will be described in detail with reference to the accompanying.
The LED drive device A1 of present embodiment possesses adjustment portion C, abnormity detection portion 3, exchange/straight as shown in Figure 1
Flow transformation component 4, full-wave rectifier 5, control unit D and light adjusting circuit portion 6 etc..In the example in fig 1, adjustment portion C is by direct current/straight
Stream transformation component 1 and DC/DC conversion portion 2 are constituted.Ac/dc transformation component 4 is by power-factor improvement (Power Factor
Correction：PFC) circuit composition.
Full-wave rectifier 5 is made up of diode bridge, complete to being carried out from the AC power E alternating voltages supplied and alternating current
Ac/dc transformation component 4 is output to after ripple rectification.
Ac/dc transformation component 4 is configured to the alternating electromotive force as input electric power being transformed to direct current power.Fig. 1's
In example, ac/dc transformation component 4 is made up of conventional well-known boost chopper, the boost chopper include by
The switch element 41 of field-effect transistor composition, PFC control circuit 40, the choking-winding for switch element 41 switch control
42nd, diode 43, smoothing capacity device 44 etc..Wherein, the action of this boost chopper is conventional it is well known that therefore saving
Slightly describe in detail.
Multiple DC/DC conversion portions 1 and 2 are connected in parallel in the output end of ac/dc transformation component 4.Here, handing over
The output end in stream/DC converting portion 4 is made up of the two ends of smoothing capacity device 44.Distinguish in multiple DC/DC conversion portions 1 and 2
It is configured to the direct current power from exchange/DC converting portion 4 being transformed to direct current power corresponding with control unit D control.
In Fig. 1 example, DC/DC conversion portion 1 is well-known buck circuit, including switch element 11, inductance in the past
Device 12, diode 13, smoothing capacity device 14, detection winding 15 and diode 16 etc..The negative electrode and ac/dc of diode 13
The cathode output end connection of the output end of transformation component 4, the anode of diode 13 is connected with the drain electrode of switch element 11.Switch member
The source electrode of part 11 is connected with the cathode output end for the ac/dc transformation component 4 being grounded.The first end and diode of inductor 12
13 anode connection, the second end of inductor 12 is connected with the negative pole end of smoothing capacity device 14.The positive terminal of smoothing capacity device 14
It is connected with the negative electrode of diode 13.Moreover, the two ends of smoothing capacity device 14 constitute the output end in DC/DC conversion portion 1, its
It is connected with one in multiple LED/light source B1 and B2, i.e. LED/light source B1.In addition, detection winding 15 and the magnetic coupling of inductor 12,
The first end of detection winding 15 is grounded, and the second end of detection winding 15 is connected with the anode of diode 16.Moreover, diode
16 negative electrode is connected with abnormity detection portion 3.
In the example in fig 1, DC/DC conversion portion 2 is also conventional well-known buck circuit, including is switched
Element 21, inductor 22, diode 23, smoothing capacity device 24, detection winding 25 and diode 26 etc..The negative electrode of diode 23
It is connected with the cathode output end of ac/dc transformation component 4, the anode of diode 23 is connected with the drain electrode of switch element 21.Switch
The source electrode of element 21 is grounded.The first end of inductor 22 is connected with the anode of diode 23, and the second end of inductor 22 is with putting down
The negative pole end connection of sliding capacitor 24.The positive terminal of smoothing capacity device 24 is connected with the negative electrode of diode 23.Moreover, smoothing capacity
The two ends of device 24 constitute the output end in DC/DC conversion portion 2, and it is connected with another LED/light source B2.In addition, detection winding
25 are grounded with the magnetic coupling of inductor 22, the first end of detection winding 25, and the second end and the diode 26 of detection winding 25
Anode connection.Moreover, the negative electrode of diode 26 is connected with abnormity detection portion 3.
In the example in fig 1, control unit D is made up of first control circuit 10 and second control circuit 20.First control electricity
Road 10 is after switch element 11 is connected, once the electric current (inductor current) for flowing through switch element 11 via inductor 12 reaches
Just switch element 11 is disconnected to defined peak value.When switch element 11 disconnects, the magnetic energy being accumulated in inductor 12 is put
Go out, smoothing capacity device 14 is charged via diode 13.Then, when the regenerative current that smoothing capacity device 14 is flowed to from inductor 12
During vanishing, first control circuit 10 again connects switch element 11.By so by 10 pairs of switch members of first control circuit
Part 11 carries out switch control, and the DC voltage inputted from ac/dc transformation component 4 can be depressurized to the first LED/light source B1 institutes
The DC voltage needed.
Similarly, second control circuit 20 is after switch element 21 is connected, once flow through switch via inductor 22
The electric current (inductor current) of element 21 reaches that defined peak value just disconnects switch element 21.When switch element 21 disconnects,
The magnetic energy being accumulated in inductor 22 is released, and smoothing capacity device 24 is charged via diode 23.Then, when from inductor 22
When flowing to the regenerative current vanishing of smoothing capacity device 24, second control circuit 20 again connects switch element 21.By this
Sample carries out switch control by second control circuit 20 to switch element 21, the direct current that will can be inputted from ac/dc transformation component 4
DC voltage required for voltage step-down to the second LED/light source B2.
Wherein, the control action of above-mentioned first control circuit 10 and second control circuit 20 is referred to as critical conduction mode, but
It is that its purport is not limited to this.That is, the first and second control circuits 10,20 can also reach the lower limit higher than zero in regenerative current
Switch element 11,21 is connected into (continuous mode) at the time of value, or member can also will be switched after regenerative current vanishing
Part 11,21 connects (discontinuous mode).
Light adjusting circuit portion 6 is configured to from from the dim signal of outside input read dimming level, by the light modulation read out
Level is supplied to first control circuit 10 and second control circuit 20.First control circuit 10 and second control circuit 20 with from tune
The dimming level that optical circuit portion 6 is provided correspondingly changes the peak value being compared with inductor current.Then, become by peak value
Change, to increase or decrease the direct current power (delivery) to the first LED/light source B1 and the second LED/light source B2 supplies, so as to the
One LED/light source B1 and the second LED/light source B2 light output are adjusted (light modulation).Wherein, as the light modulation side in light adjusting circuit portion 6
Method, can also be used by changing during electric current is supplied from DC/DC conversion portion 1,2 to LED/light source B1, B2 with stopping confession
Ratio during to electric current changes dimming level, so-called pulse light modulation (バ ー ス ト Tone light).Can also be by above-mentioned two
Plant light-dimming method combination.
Abnormity detection portion 3 is configured to detect the exception of multiple LED/light sources respectively.In the example in fig 1, abnormity detection portion 3
It is configured to detect the first LED/light source B1 and the second LED/light source B2 exception respectively.For example, abnormity detection portion 3 is by comparator, micro-
Type computer is constituted.Moreover, abnormity detection portion 3 is configured to be detected respectively according to the detection voltage produced in detection winding 15,25
First LED/light source B1 and the second LED/light source B2 exception (short-circuit or non-loaded).For example, detecting the one of multiple LED/light sources
Partly during the exception of (being in the example in fig 1 the side in the first LED/light source B1 and the second LED/light source B2), abnormity detection portion 3
Signal is detected to a part of corresponding control circuit 10 or 20 output abnormality.
Fig. 2 shows the physical circuit example of abnormity detection portion 3.In addition, in fig. 2, illustrate only and DC/DC conversion portion
Detection voltage (first detection voltage) the corresponding circuit structure produced in 1 detection winding 15, on DC/DC conversion
Detection voltage (the second detection voltage) the corresponding circuit structure produced in the detection winding 25 in portion 2 is (except microcomputer 30
In addition.), omit diagram.Wherein, voltage is detected with first illustrated in corresponding with the second detection voltage circuit structure and Fig. 2
Corresponding circuit structure is identical.
It is zero during the connection of switch element 11,21 that detection voltage (the first detection voltage and the second detection voltage), which is,
During the disconnection of switch element 11,21 for high level square wave voltage signal, voltage and DC-DC during high level
The output voltage of transformation component 1,2 has dependency relation.Thus, in the case where LED/light source B1, B2 there occurs short trouble, directly
The output voltage in stream/DC converting portion 1,2 is almost nil, therefore detection voltage is also the voltage close to zero.On the other hand, by
Distribution of the connection not exclusively or in LED/light source B1, B2 in LED/light source B1, B2 and DC/DC conversion portion 1,2 disconnect and
In the case of being changed into no-load condition, the output voltage and input voltage (ac/dc transformation component in DC/DC conversion portion 1,2
4 output voltage) it is roughly equal.Therefore, voltage when detection voltage is higher than normal.
In the example in figure 2, in abnormity detection portion 3, in the LPF by being made up of resistance R1 and capacitor C1
Device is removed after the radio-frequency component included in the first detection voltage, and the first detection voltage is divided by divider resistance R2, R3
Pressure.Capacitor C2 is charged with the first detection voltage after partial pressure, capacitor C2 both end voltage is input into microcomputer
The input port of calculation machine 30.30 pairs of microcomputer is input to the first detection voltage (the first detection after partial pressure of input port
Voltage) carry out after A/D conversion being compared with big threshold value and small threshold value the two threshold values.
Then, it is less than small threshold value (hereinafter referred to as " first if carrying out A/D to the first detection voltage and converting obtained value
Lower limit ") or higher than big threshold value (hereinafter referred to as " the first higher limit "), then microcomputer 30 will the first LED light of expression
Source B1 generates the first abnormal anomaly detection signal and is respectively outputted to the first and second control circuits 10,20.In addition, under first
Limit value be set to than it is normal when first detection voltage fully it is small and more than zero value.In addition, the first higher limit is set to
Than it is normal when the first detection voltage it is fully big and than assuming that the output voltage in DC/DC conversion portion 1,2 is equal to input voltage
When the first and second small values of detection voltages.Similarly, abnormity detection portion 3 will be examined to be input to another input port second
Survey that voltage carries out the A/D obtained values of conversion and big threshold value and small threshold value the two threshold values are compared.Then, if to
The value that two detection voltages progress A/D conversion are obtained is less than small threshold value (the second lower limit) or higher than big threshold value (on second
Limit value), then microcomputer 30 will represent that the second LED/light source B2 generates the second abnormal anomaly detection signal and is respectively outputted to
First and second control circuits 10,20.
Control unit D is configured to, when abnormity detection portion 3 detects the exception of a part for multiple LED/light sources, be adjusted
Portion C control is so that adjustment portion C stops to a part of output, and makes adjustment portion C to the remainder of multiple LED/light sources
Output increase.In the example in fig 1, first control circuit 10 passes through in the case where being transfused to the first anomaly detection signal
The switch motion of shutdown switch element 11 stops DC/DC conversion portion 1.That is, first control circuit 10 makes tune
Whole C stops to the first LED/light source B1 of the part as above-mentioned multiple LED/light sources output.Second control circuit 20 exists
In the case of being transfused to the second anomaly detection signal, by the switch motion of shutdown switch element 21 by DC/DC conversion
Portion 2 stops.That is, second control circuit 20 makes adjustment portion C to second of the part as above-mentioned multiple LED/light sources
LED/light source B2 output stops.As a result, stopping one into LED/light source B1, B2 for generating abnormal (short-circuit or non-loaded)
Side's power supply, protection, the abnormal suppression risen of output voltage in DC/DC conversion portion 1,2 can be realized respectively.
Also, first control circuit 10 be not transfused to the first anomaly detection signal and is being transfused to the second abnormality detection letter
In the case of number, when being higher than normal by the defined peak value for making to disconnect switch element 11,21, to make to become from DC-DC
Change direct current power (delivery) increase of the portion 1 to the first LED/light source B1.In other words, first control circuit 10 makes adjustment portion C to work
For the first LED/light source B1 of the remainder of above-mentioned multiple LED/light sources output increase.As a result, the first LED/light source B1 light
(light quantity) increase is exported, is declined therefore, it is possible to suppress the illumination in the case where the second LED/light source B2 extinguishes.
Similarly, second control circuit 20 be not transfused to the second anomaly detection signal and is being transfused to the first abnormality detection
In the case of signal, when being higher than normal by making peak value, to make the direct current from DC/DC conversion portion 2 to the second LED/light source B2
Electric power increase.In other words, second control circuit 20 makes adjustment portion C to second of the remainder as above-mentioned multiple LED/light sources
LED/light source B2 output increase.As a result, the second LED/light source B2 light output increase, therefore, it is possible to suppress in the first LED light
Illumination in the case that source B1 extinguishes declines.
As described above, the LED drive device A1 of present embodiment is configured to by the way that input electric power is transformed into direct current power
(desired direct current power) and the direct current power is supplied to multiple LED/light source B1, B2 sides, to enter to multiple LED/light source B1, B2
Row driving.Moreover, the LED drive device A1 of present embodiment possesses：Abnormity detection portion 3, consists of and detects multiple LED respectively
Light source B1, B2 exception；And adjustment portion C (DC/DC conversion portion 1 and DC/DC conversion portion 2), consist of difference
The direct current power that adjustment will be supplied to multiple LED/light source B1, B2 sides, using the direct current power after adjusting respectively as to multiple
The respective output of LED/light source B1, B2.Also, the LED drive device A1 of present embodiment possesses control unit D (first control circuits
10 and second control circuit 20).Control unit D is configured to detect multiple LED/light source B1, B2 a part in abnormity detection portion 3
Exception when, be adjusted portion C (DC/DC conversion portion 1,2) control so that adjustment portion C stops to a part of output
Only, and make adjustment portion C to multiple LED/light source B1, B2 remainder output increase.
Thus, first control circuit 10 and second control circuit 20 are adjusted portion C control so as to abnormity detection portion 3
The output increase of abnormal above-mentioned multiple LED/light source B1, B2 remainder is not detected, therefore, it is possible to suppress during abnormal generation
Illumination decline.These, it is preferred to, if first control circuit 10 and second control circuit 20 are no longer fed with the first exception
Signal and the second anomaly detection signal are detected, then restarts the switch motion of a part for the switch element 11,21 stopped,
And peak value is reverted to original value (being transfused to the value before anomaly detection signal).It is further preferred, that the first control electricity
It is original that road 10 and second control circuit 20 will revert to the output of the remainder of switch element 11,21 that output increases
Value.Thereby, it is possible to avoid the mistake when replacing by LED/light source B1, B2 etc. eliminates abnormal (short-circuit, non-loaded) from moving
Make.
In addition, in the LED drive device A1 of present embodiment, preferably possess ac/dc transformation component 4, the friendship
Stream/DC converting portion 4 is configured to the alternating electromotive force as above-mentioned input electric power being transformed to direct current power.And, it is preferred that
Adjustment portion C possesses multiple DC/DC conversion portions 1,2, and the plurality of DC/DC conversion portion 1,2 is in ac/dc transformation component 4
Output end be connected in parallel.Preferably, multiple LED/light sources (first and second LED/light source B1, B2) one by one with it is multiple straight
The output end connection in stream/DC converting portion 1,2.Preferably, multiple DC/DC conversion portions 1,2 are respectively structured as in the future
Direct current power corresponding with control unit D control is transformed to from the direct current power in exchange/DC converting portion 4.As long as it is such
Structure, it becomes possible to an ac/dc transformation component 4 is shared by multiple DC/DC conversion portions 1,2, therefore, it is possible to realize circuit
The simplification of structure.
, can also be as follows as other embodiments of the present invention：LED drive device A2 possesses many as shown in Figure 3
Individual ac/dc transformation component 4A, 4B, the plurality of ac/dc transformation component 4A, 4B are respectively structured as that above-mentioned input electric power will be used as
Alternating electromotive force be transformed to direct current power.Further it is preferred that multiple DC/DC conversion portions 1,2 are one by one handed over multiple
Stream/DC converting portion 4A, 4B multiple output end connection, multiple LED/light sources (first and second LED/light source B1, B2) are one by one
Ground is connected with multiple output end in multiple DC/DC conversion portions 1,2.In the example in figure 3, multiple DC/DC conversions
Portion 1,2 is configured to being transformed to each direct current power from multiple ac/dc transformation component 4A, 4B into the control with control unit D
Corresponding direct current power.In addition it is also possible to be set to following structure：As shown in figure 4, for two DC/DC conversion portions 1,2 points
Not She Zhi abnormity detection portion 3, the anomaly detection signal of each abnormity detection portion 3 is respectively outputted to two DC/DC conversion portions
1st, 2 control circuit 10,20.
It is further preferred, that control unit D (the first and second control circuits 10,20) is being adjusted portion's C (DC-DCs
Transformation component 1, control 2) cause adjustment portion C to the value ratio of the output of multiple LED/light sources (first and second LED/light source B1, B2)
In the case that multiple respective rated values of LED/light source (rated electrical value) are low, multiple LED/light sources are detected in abnormity detection portion 3
A part exception when, stop adjustment portion C to a part of output.For example, rated value corresponds to the light output of LED/light source
As the power value (rated electrical value) to LED/light source when 100%.And, it is preferred that control unit D is adjusted portion C's
Control so that adjustment portion C is to the value of the output of multiple LED/light sources (first and second LED/light source B1, B2) close to above-mentioned rated value.
For example in the A of Fig. 5 shown in dotted line α, it is assumed that control unit D (first control circuit 10 and second control circuit 20) passes through
Initial illuminance correction adjusts the output in (reduction) adjustment portion C (DC/DC conversion portion 1 and DC/DC conversion portion 2).So
Afterwards, in the case where the first LED/light source B1 there occurs exception, first control circuit 10 stops DC/DC conversion portion 1.Separately
On the one hand, it is preferred that if the second LED/light source B2 is normal, second control circuit 20 is as shown in solid line β in Fig. 5 A
Stop initial illuminance correction and increase the output in DC/DC conversion portion 2, make the second LED/light source B2 light output close to volume
Definite value (100%).Or, second control circuit 20 can also increase DC-DC change as shown in solid line γ in Fig. 5 B
The output in portion 2 is changed to make the second LED/light source B2 light output be rated value (100%).That is, control unit C can also structure
As the control for being adjusted portion C so that value from adjustment portion C to the output of the remainder of multiple LED/light sources and above-mentioned rated value
Unanimously.There is the control of first control circuit 10 and second control circuit 20 to become to hold when light output being set into rated value like this
Easy advantage.
, can also be real in such as Fig. 5 C at low-key light (such as dimming level is below 50%) as other control examples
Be controlled such that like that shown in line β light output and original lightness it is roughly equal (be 2 in the number of multiple LED/light sources
In the case of when detecting the exception of LED/light source, the light that the light output of another normal LED/light source is increased into 2 times is defeated
Go out).In detail, control unit D causes adjustment portion C to first and second LED/light source B1, B2's in the control for being adjusted portion C
Mutually the same and lower than the first and second respective rated values of LED/light source B1, B2 situation of the value (with light output level) of output
Under, if the first and second respective dimming levels of LED/light source B1, B2 (light output level) are less than 50%, it will can be somebody's turn to do
Dimming level (light output level) is increased to 2 times.Therefore, control unit D can also be configured to cause in the control for being adjusted portion C
Adjustment portion C is mutually the same and more each than first and second LED/light source B1, B2 to the value of first and second LED/light source B1, B2 output
From rated value it is low in the case of, the exception of the side in abnormity detection portion 3 detects first and second LED/light source B1, B2
When, adjustment portion C is stopped to the output of a side.In this case, control unit D be configured to be adjusted portion C control with
Make the value (C of reference picture 5 α) of the output of the opposing party of from adjustment portion C to first and second LED/light source B1, B2 defeated as this
2 times of the value (C of reference picture 5 β) that goes out or make the value of the output in the case where 2 times of the value exceedes above-mentioned rated value
As the rated value (C of reference picture 5 β).
In addition, LED drive device A1, A2 of present embodiment is configured to drive first and second LED/light source B1, B2
Dynamic (lighting), but can also be configured to be driven the LED/light source of more than three.In addition, the LED drivings of present embodiment
Multiple LED/light source B1, B2 that device A1, A2 are driven need not be the LED light of identical (rated voltage is identical with rated current)
Source, can be the rated voltage LED/light source different with least one party of rated current.
In addition, when being that only one of which DC/DC conversion portion 1 or 2 is acted in exception, with two DC-DCs
Transformation component 1,2 acted it is normal when compared to the output voltage of ac/dc transformation component 4 be light load, therefore rise can
Can property height.In addition, in the case where being changed into light load, the output voltage of ac/dc transformation component 4 produces fluctuation, due to the ripple
Dynamic influence and the electric current that flows through LED/light source B1 or B2 produces variation, it is possible to producing flicker.
However, in LED drive device A1, A2 of present embodiment, the direct current of the side due to making to proceed action/
DC converting portion 1 or 2, the output increase of the remainder of i.e. above-mentioned multiple LED/light sources, therefore with not making the increased situation of output
Compare, the generation of rising and the fluctuation of the output voltage of ac/dc transformation component 4 can be suppressed.
In addition, DC/DC conversion portion 1,2 can also be that switch element 11,21 is set into high potential as shown in Figure 6
The circuit structure of side (high-pressure side) (wherein, illustrate only DC/DC conversion portion 1, omits DC/DC conversion portion in figure 6
2 diagram).
Fig. 7 A and Fig. 7 B represent the embodiment of ligthing paraphernalia involved in the present invention.The luminaire of present embodiment
Tool 7 is used in street lamp etc., possesses the appliance body 70 installed on the top for being erected on the pillar P on ground.
Appliance body 70 is formed as flat rectangular box by aluminium diecasting, be internally accommodated with the first LED/light source B1 and
Second LED/light source B2.Appliance body 70 is in the lower surface opening formation rectangle opposite with first and second LED/light source B1, B2
Fenestra 71, is radiated downwards the light from LED/light source B1, B2 by the fenestra 71.Wherein, fenestra 71 is reinforced glass system
The occlusion of transparent panel 72.
In addition, being also accommodated with LED drive device A1 in appliance body 70.LED drive device A1 is via being laid in pole P
The power line (not shown) of inside be supplied to alternating voltage/alternating current from AC power E.
In addition, ligthing paraphernalia involved in the present invention is not limited to street lamp, for example, it can also be illuminated to tunnel internal
Ligthing paraphernalia etc..
Claims (5)
1. a kind of LED drive device, is configured to by the way that input electric power is transformed into direct current power and supply above-mentioned direct current power
To multiple LED light sources, to be driven to above-mentioned multiple LED/light sources, the LED drive device is characterised by possessing：
Abnormity detection portion, consists of the exception for detecting above-mentioned multiple LED/light sources respectively；
Adjustment portion, consists of the above-mentioned direct current power that adjustment will power to above-mentioned multiple LED light sources respectively, will adjust respectively
The direct current power afterwards is as to the respective output of above-mentioned multiple LED/light sources；And
Control unit, is consisted of when above-mentioned abnormity detection portion detects the exception of a part for above-mentioned multiple LED/light sources, is carried out
Above-mentioned adjustment portion is controlled so that above-mentioned adjustment portion stops to a part of output, and makes above-mentioned adjustment portion to above-mentioned multiple
The output increase of the remainder of LED/light source,
Wherein, above-mentioned abnormity detection portion is configured to when detecting the exception of a part of above-mentioned multiple LED/light sources, to above-mentioned control
Portion's output processed represents that a part for above-mentioned multiple LED/light sources generates abnormal anomaly detection signal,
Above-mentioned control unit is configured to cause above-mentioned adjustment portion to the defeated of above-mentioned multiple LED/light sources in the control for carrying out above-mentioned adjustment portion
In the case that the value gone out is lower than above-mentioned multiple respective rated values of LED/light source, detected in above-mentioned abnormity detection portion above-mentioned multiple
During the exception of a part for LED/light source, controlling so that above-mentioned adjustment portion is to above-mentioned multiple LED/light sources for above-mentioned adjustment portion is carried out
The output of a part stops, and makes above-mentioned adjustment portion to the value of the output of the remainder of above-mentioned multiple LED/light sources close to upper
State rated value.
2. a kind of LED drive device, is configured to by the way that input electric power is transformed into direct current power and supply above-mentioned direct current power
To multiple LED light sources, to be driven to above-mentioned multiple LED/light sources, the LED drive device is characterised by possessing：
Abnormity detection portion, consists of the exception for detecting above-mentioned multiple LED/light sources respectively；
Adjustment portion, consists of the above-mentioned direct current power that adjustment will power to above-mentioned multiple LED light sources respectively, will adjust respectively
The direct current power afterwards is as to the respective output of above-mentioned multiple LED/light sources；And
Control unit, is consisted of when above-mentioned abnormity detection portion detects the exception of a part for above-mentioned multiple LED/light sources, is carried out
Above-mentioned adjustment portion is controlled so that above-mentioned adjustment portion stops to a part of output, and makes above-mentioned adjustment portion to above-mentioned multiple
The output increase of the remainder of LED/light source,
Wherein, above-mentioned abnormity detection portion is configured to when detecting the exception of a part of above-mentioned multiple LED/light sources, to above-mentioned control
Portion's output processed represents that a part for above-mentioned multiple LED/light sources generates abnormal anomaly detection signal,
Above-mentioned control unit is configured to cause above-mentioned adjustment portion to the defeated of above-mentioned multiple LED/light sources in the control for carrying out above-mentioned adjustment portion
In the case that the value gone out is lower than above-mentioned multiple respective rated values of LED/light source, detected in above-mentioned abnormity detection portion above-mentioned multiple
During the exception of a part for LED/light source, controlling so that above-mentioned adjustment portion is to above-mentioned multiple LED/light sources for above-mentioned adjustment portion is carried out
A part output stop, and make value from above-mentioned adjustment portion to the output of the remainder of above-mentioned multiple LED/light sources with it is above-mentioned
Rated value is consistent.
3. a kind of LED drive device, is configured to by the way that input electric power is transformed into direct current power and supply above-mentioned direct current power
To multiple LED light sources, to be driven to above-mentioned multiple LED/light sources, the LED drive device is characterised by possessing：
Abnormity detection portion, consists of the exception for detecting above-mentioned multiple LED/light sources respectively；
Adjustment portion, consists of the above-mentioned direct current power that adjustment will power to above-mentioned multiple LED light sources respectively, will adjust respectively
The direct current power afterwards is as to the respective output of above-mentioned multiple LED/light sources；And
Control unit, is consisted of when above-mentioned abnormity detection portion detects the exception of a part for above-mentioned multiple LED/light sources, is carried out
Above-mentioned adjustment portion is controlled so that above-mentioned adjustment portion stops to a part of output, and makes above-mentioned adjustment portion to above-mentioned multiple
The output increase of the remainder of LED/light source,
Wherein, above-mentioned abnormity detection portion is configured to when detecting the exception of a part of above-mentioned multiple LED/light sources, to above-mentioned control
Portion's output processed represents that a part for above-mentioned multiple LED/light sources generates abnormal anomaly detection signal,
Above-mentioned multiple LED/light sources include the first LED/light source and the second LED/light source,
Above-mentioned control unit is configured to carrying out the control of above-mentioned adjustment portion so that above-mentioned adjustment portion is to above-mentioned first LED/light source and upper
The value for stating the output of the second LED/light source is mutually the same and respective more specified than above-mentioned first LED/light source and above-mentioned second LED/light source
In the case that value is low, a side's in above-mentioned abnormity detection portion detects above-mentioned first LED/light source and above-mentioned second LED/light source
When abnormal, the control of above-mentioned adjustment portion is carried out so that above-mentioned adjustment portion is into above-mentioned first LED/light source and above-mentioned second LED/light source
The output of a side stop, and make the opposing party of above-mentioned adjustment portion into above-mentioned first LED/light source and above-mentioned second LED/light source
Output value turn into the output 2 times of value or 2 times of the value exceed above-mentioned rated value in the case of make the output
Value turns into the rated value.
4. the LED drive device according to any one of claims 1 to 3, it is characterised in that
Possesses ac/dc transformation component, the ac/dc transformation component is configured to that the alternating electromotive force change of above-mentioned input electric power will be used as
It is changed to direct current power,
Above-mentioned adjustment portion possesses multiple DC/DC conversion portions, and the plurality of DC/DC conversion portion becomes in above-mentioned ac/dc
The output end for changing portion is connected in parallel,
Multiple output end of the above-mentioned multiple LED/light sources one by one with above-mentioned multiple DC/DC conversion portions are connected,
Above-mentioned multiple DC/DC conversion portions are respectively structured as the above-mentioned direct current power from above-mentioned ac/dc transformation component
It is transformed to direct current power corresponding with the control of above-mentioned control unit.
5. a kind of ligthing paraphernalia, it is characterised in that possess：
LED drive device according to any one of Claims 1 to 4；
The above-mentioned multiple LED/light sources driven by above-mentioned LED drive device；And
At least keep the appliance body of above-mentioned multiple LED/light sources.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-152956 | 2013-07-23 | ||
| JP2013152956A JP6167455B2 (en) | 2013-07-23 | 2013-07-23 | LED driving device and lighting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104349544A CN104349544A (en) | 2015-02-11 |
| CN104349544B true CN104349544B (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410350686.7A Expired - Fee Related CN104349544B (en) | 2013-07-23 | 2014-07-22 | LED drive device and ligthing paraphernalia |
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| Country | Link |
|---|---|
| JP (1) | JP6167455B2 (en) |
| CN (1) | CN104349544B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI666969B (en) * | 2017-01-06 | 2019-07-21 | 日商東芝照明技術股份有限公司 | Power supply device and lighting device provided with the same |
| KR102118623B1 (en) * | 2017-07-31 | 2020-06-03 | 주식회사 루닉스 | Flicker Prevention LED Lightening Device |
| CN113840428B (en) * | 2021-09-28 | 2023-12-08 | 厦门普为光电科技有限公司 | Multi-light source lighting system and control method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4776463B2 (en) * | 2006-07-20 | 2011-09-21 | シャープ株式会社 | Surface light source device, illumination device, backlight device, and display device |
| CN101945513A (en) * | 2009-07-08 | 2011-01-12 | 连营科技股份有限公司 | Light-emitting diode device with compensating mechanism |
| CN201557308U (en) * | 2009-10-29 | 2010-08-18 | 新巨企业股份有限公司 | Monitoring circuit of LED lamp group |
| JP5588184B2 (en) * | 2010-01-26 | 2014-09-10 | パナソニック株式会社 | LED lighting device, lighting device, and vehicle |
| CN201682666U (en) * | 2010-04-28 | 2010-12-22 | 优源科技股份有限公司 | Driver of adjustable light-emitting diode |
| JP5132749B2 (en) * | 2010-10-07 | 2013-01-30 | 三菱電機株式会社 | Light source lighting device and lighting fixture |
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2013
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| Publication number | Publication date |
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| JP6167455B2 (en) | 2017-07-26 |
| CN104349544A (en) | 2015-02-11 |
| JP2015023002A (en) | 2015-02-02 |
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