CN204104187U - Supply unit and lighting device - Google Patents
Supply unit and lighting device Download PDFInfo
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- CN204104187U CN204104187U CN201420512419.0U CN201420512419U CN204104187U CN 204104187 U CN204104187 U CN 204104187U CN 201420512419 U CN201420512419 U CN 201420512419U CN 204104187 U CN204104187 U CN 204104187U
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Abstract
The utility model relates to a kind of supply unit and lighting device, its object is to reduce the high-frequency noise from substrate radiation.Supply unit possesses: substrate; First power circuit, is arranged on substrate, alternating voltage is converted to direct voltage; The second source circuit of more than 3, corresponding multiple light source is arranged on substrate respectively, converts the direct voltage be converted to by the first power circuit to predetermined voltage, and is supplied to corresponding light source.Each second source circuit in parallel is connected on substrate from the different link position the power supply wiring that the first power circuit extends.The length of the power supply wiring till the link position of each second source circuit is played from being short to long order with the first power circuit, when to each second source circuit allocation order, compared with the link position of the 2nd second source circuit, position on the power supply wiring that the first power circuit is farther and between the ground connection distribution on substrate, at least arranges 1 capacitor.
Description
Technical field
Execution mode of the present utility model relates to a kind of supply unit and lighting device.
Background technology
There will be a known a kind of supply unit, it possesses: alternating voltage is converted to the rectification circuit of direct voltage, the direct voltage after conversion is converted to predetermined voltage and is supplied to the voltage conversion circuit of LED (Light Emittin g Diode, light-emitting diode) even load.In this kind of supply unit, when there is the load of multiple independent control, voltage conversion circuit is arranged in the load of each independent control.
But electric equipment is because of the restriction in design, and the shape of the substrate that the electric component forming rectification circuit or voltage conversion circuit etc. configures is restricted sometimes.Thus, the configuration of the electric component sometimes on substrate is restricted.Such as, if elongated substrate, then sometimes have to electric component to be arranged at the long side direction of substrate.If be arranged along predetermined direction by electric component, then the distribution on the substrate making electric component be connected to each other is elongated.If distribution is elongated, then the inductance composition of distribution becomes large, and the high-frequency noise produced because of the resonance of capacitive component had with electric component becomes large.
Patent documentation 1: Japanese Unexamined Patent Publication 2013-229234 publication
Summary of the invention
Problem to be solved in the utility model is to reduce high-frequency noise.
Supply unit involved by execution mode possesses: substrate, first power circuit, to be arranged on described substrate and by alternating voltage conversion dc voltage, the second source circuit of more than 3, corresponding multiple load and be arranged on described substrate respectively, and the direct voltage be converted to by described first power circuit is converted to predetermined voltage, and be supplied to corresponding load, second source circuit in parallel described in each is connected on substrate from the different link position the power supply wiring that described first power circuit extends, with the length of the described power supply wiring of described first power circuit to the described link position of second source circuit described in each from being short to long order, to described in each when second source circuit allocation order, apart from described first power circuit length than the 2nd second source circuit link position till the long described power supply wiring of length on position and the ground connection distribution on described substrate between be at least provided with 1 capacitor.
In addition, the lighting device involved by execution mode, possesses: supply unit and the light source as described load, and described supply unit possesses: substrate, first power circuit, is arranged on described substrate, alternating voltage is converted to direct voltage, the second source circuit of more than 3, respectively corresponding multiple load and arrange on the substrate, convert predetermined voltage to by the direct voltage be converted to by described first power circuit, be supplied to corresponding load, second source circuit described in each is connected in parallel in from the different link position the power supply wiring of described first power circuit extension on the substrate, with the length of the described power supply wiring of described first power circuit to the described link position of second source circuit described in each from being short to long order, to described in each when second source circuit allocation order, on described power supply wiring the first power circuit described in distance length than the 2nd second source circuit link position till the long position of length and the ground connection distribution on described substrate between, at least be provided with 1 capacitor.
Wherein, in second source circuit described in each, described capacitor be arranged on described power supply wiring as upper/lower positions and as described between ground connection distribution, the position on described power supply wiring is via the length of the distribution of described power supply wiring to described first power circuit and the position becoming below predetermined length via the shorter side the length of the distribution of described power supply wiring to described capacitor from this second source circuit.
When the quantity of described second source circuit is n, n is the integer of more than 3, position on described power supply wiring between the link position of the described second source circuit of the kth on described power supply wiring and the link position of kth+1 described second source circuit and between described ground connection distribution, 1 described capacitor is at least set, when n is even number, the value of k is n/2, and when n is odd number, the value of k is (n+1)/2.
Be provided with 6 described second source circuit on the substrate, position on described power supply wiring between the link position of the 3rd described second source circuit on described power supply wiring and the link position of the 4th described second source circuit and between described ground connection distribution, is at least provided with 1 described capacitor.
Described in each, second source circuit at least has: inductor; Diode; Switch element, during conducting, by the Power supply from described first power circuit to described inductor, during cut-off, cut off the Power supply from described first power circuit to described inductor, and savings is released via described diode in the energy of described inductor; Described supply unit also possesses control circuit, and described control circuit makes the control signal of described switching elements conductive and cut-off to the described switch element supply that second source circuit described in each has.
According to the utility model, can expect to reduce the noise radiated.
Embodiment
Supply unit involved by the execution mode below illustrated possesses: substrate; First power circuit, is arranged on substrate, and alternating voltage is converted to direct voltage; The second source circuit of more than 3, respectively corresponding multiple load and be arranged on substrate, be converted to predetermined voltage by the direct voltage be converted to by the first power circuit, and be supplied to corresponding load.Each second source circuit in parallel is connected on substrate from the different link position the power supply wiring that the first power circuit extends, and with the length of the power supply wiring of the first power circuit to the link position of each second source circuit from being short to long order to each second source circuit allocation order, distance the first power circuit length than the 2nd second source circuit link position till length grow power supply wiring on position and the ground connection distribution on substrate between, be at least provided with 1 capacitor.According to this supply unit, the path that substrate is configured in the high-frequency noise that ratio capacitance device produces away from the second source circuit of the position of the first power circuit more can be shortened into the path to capacitor, should the path of comparing the first power circuit, the path to capacitor short.Thus, reduce the inductance composition of the distribution in the path forming high-frequency noise, can expect to reduce high-frequency noise.
And, in supply unit involved by the execution mode below illustrated, in each second source circuit, capacitor be preferably arranged on power supply wiring as between upper/lower positions and ground connection distribution, the position on described power supply wiring is the position becoming below predetermined length from the shorter side the length of this second source circuit via the distribution of power supply wiring to the first power circuit and the length via the distribution of power supply wiring to capacitor.Thereby, it is possible to be below predetermined length by the length setting of the distribution forming the path of high-frequency noise, the inductance composition contained by distribution can be reduced.Thereby, it is possible to expect high-frequency noise to be reduced to below predetermined value.
And, in supply unit involved by the execution mode below illustrated, when the quantity of second source circuit being set to n (n is the integer of more than 3), position on power supply wiring between the link position of the kth second source circuit on power supply wiring and the link position of (k+1) individual second source circuit and between ground connection distribution, at least be provided with 1 capacitor, wherein, when n is even number, the value of k is n/2, when n is odd number, the value of k can be (n+1)/2.Thus, in multiple second source circuit, can the maximum of the length of the power supply wiring to the first power circuit or capacitor and ground connection distribution be suppressed to lower.Thereby, it is possible to expect to reduce high-frequency noise.
And, in supply unit involved by the execution mode below illustrated, substrate is provided with 6 second source circuit, position on power supply wiring between the link position of the 3rd second source circuit on power supply wiring and the link position of the 4th second source circuit and between ground connection distribution, is at least provided with 1 capacitor.Thus, in 6 second source circuit, can the maximum of the distribution on the substrate to the first power circuit or capacitor be suppressed to lower.Thereby, it is possible to expect to reduce high-frequency noise.
Further, in the supply unit involved by the execution mode below illustrated, each second source circuit at least has: inductor; Diode; Switch element, during conducting, by the Power supply from the first power circuit to inductor, during cut-off, cuts off the Power supply from the first power circuit to inductor, and is released via diode by the energy put aside in inductor; Supply unit can also possess control circuit, and this control circuit makes the control signal of switching elements conductive and cut-off to the switch element supply that each second source circuit has.
Further, in the supply unit involved by the execution mode below illustrated, load can be semiconductor light-emitting elements.Further, the lighting device involved by the execution mode below illustrated can possess above-mentioned supply unit and the light-emitting component as load.
Hereinafter, with reference to the accompanying drawings of the supply unit involved by execution mode and lighting device.In addition, in embodiments, to the structure mark same-sign with identical function, and repeat specification is omitted.Further, the supply unit illustrated in the following embodiments and lighting device are expression one example, do not limit the utility model.Further, following execution mode can be suitable in reconcilable scope combination.
(the first execution mode)
[structure of lighting device 1]
Fig. 1 is the stereogram of an example of the lighting device 1 represented involved by execution mode.Lighting device 1 is such as ceiling light, and possesses the lampshade 11 of whole lower surface of apparatus main body 10, cladding system main body 10.Substrate is set at the lower surface of apparatus main body 10, this substrate is configured with light source.Light source is divided into multiple (such as 6) group, can control separately lighting, light-off and light modulation for every 1 group.
Be provided with the rear side of substrate of light source, be provided with for the supply unit to light source supply electric power, and be connected to the substrate being configured with light source by cable etc.Light source is luminous according to the electric power supplied via cable.Lampshade 11 is formed by the resin material etc. with light transmission, makes the light transmission of releasing from light source.Lampshade 11 is such as transparent, also can have light diffusing.
Lighting device 1 has: the connector be such as electrically connected with roughly cylindric ceiling rose being arranged at ceiling.Lighting device 1 makes lampshade 11 be fixed on ceiling down by making connector chimeric with ceiling rose.The power supply wiring of the commercial ac power source introduced from ceiling inboard is connected with at ceiling rose.
Fig. 2 is the figure of the example representing supply unit 19.Supply unit 19 possesses the second source circuit 20-1 ~ n of substrate 12, first power circuit 13, control circuit 14 and more than 3.In the present embodiment, supply unit 19 such as possesses 6 second source circuit 20.The central authorities of substrate 12 are provided with the opening for configuring the connector chimeric with ceiling rose.Substrate 12 is arranged in lighting device 1 in the mode of the surrounding surrounding the connector chimeric with ceiling rose.
Such as shown in Fig. 2, be provided with the voltage transitions of commercial ac power source be on the substrate 12 direct voltage the first power circuit 13, the first power circuit 13 is changed after direct voltage convert desired voltage to and be supplied to multiple second source circuit 20-1 ~ n of light source and control the control circuit 14 etc. of second source circuit 20-1 ~ n respectively.In addition, in the following description, be called " second source circuit 20 " when not distinguishing second source circuit 20-1 ~ n and be referred to as.
First power circuit 13 receives the alternating voltage of commercial ac power source from ceiling rose via connector, and received alternating voltage is converted to direct voltage.The voltage transitions being converted to direct current by the first power circuit 13 is the direct voltage of desired voltage by each second source circuit 20, and via cable, the direct voltage after conversion is supplied to corresponding light source.The light-emitting component comprised in each light source is luminous according to the electric current based on supplied direct voltage.
[circuit structure of lighting device 1]
Fig. 3 is the figure of an example of the circuit structure of the lighting device 1 represented involved by the first execution mode.Under the state that the input terminal of the first power circuit 13 is fixed on ceiling at lighting device 1, be connected to commercial ac power source 15 via connector, ceiling rose and switch 16.Further, the lead-out terminal P0 of the first power circuit 13 is connected to second source circuit 20-1 ~ n via power supply wiring 120.Further, the first power circuit 13 and each second source circuit 20-1 ~ n are via ground connection distribution 121 ground connection.
With regard to second source circuit 20-1 ~ n, be respectively arranged with 1 second source circuit for each light source 30-1 ~ n.In addition, in the following description, be called " light source 30 " when not distinguishing light source 30-1 ~ n and be referred to as.
Each second source circuit 20 is connected in parallel on the substrate 12 from the diverse location the power supply wiring 120 of the first power circuit 13 extension.In the example shown in Fig. 3, second source circuit 20-1 is such as connected with power supply wiring 120 at link position P1, and from the link position P1 different position of second source circuit 20-2 such as on power supply wiring 120 and link position P2 are connected with power supply wiring 120.
Fig. 4 is the figure of an example of the structure representing each second source circuit 20.Such as, as shown in Figure 4, second source circuit 20 has diode 21, capacitor 22, inductor 23, switch element 24 and resistance 25 respectively.In the present embodiment, switch element 24 is such as MOSFET (Metal Oxide Semiconductor Field Effect Transistor, metal-oxide half field effect transistor).In addition, as other examples, switch element 24 also can be bipolar transistor or junction type FET etc.
The negative pole of diode 21 is connected with power supply wiring 120.The positive pole of diode 21 is connected to the node between inductor 23 and switch element 24.One end of capacitor 22 is connected with power supply wiring 120, and the other end is connected to the node between inductor 23 and light source 30.
One end of inductor 23 is connected with light source 30, and the other end is connected to the drain terminal of switch element 24.The drain terminal of switch element 24 is connected with the other end of inductor 23, and gate terminal is connected with control circuit 14, and source terminal is via resistance 25 ground connection.
Each light source 30 has the multiple light-emitting components 31 be connected in series.One end of each light source 30 is connected with power supply wiring 120.The other end of each light source 30 is connected with one end of inductor 23.
The example that light-emitting component 31 in present embodiment is the load that works based on the voltage supplied from second source circuit 20 and electric current.Further, in the present embodiment, light-emitting component 31 is such as the semiconductor light-emitting elements such as LED.And, as other examples, light-emitting component 31 also can be Organic Light Emitting Diode (Organic Light Emitting Diode), inorganic EL (Inorganic Electro-Luminescence) light-emitting component or can be other field emission light-emitting components etc.
The voltage transitions of the commercial ac power source received via switch 16, when switch 16 is closed, is direct voltage, and is supplied to each second source circuit 20 by the first power circuit 13.Each second source circuit 20 is desired voltage by supplying the direct voltage step-down of coming from the first power circuit 13, and is supplied to corresponding light source 30.
Control circuit 14 supplies the control signal controlled conducting and the blocking action of switch element 24 to each second source circuit 20.Specifically, control circuit 14 is the control signal of high level by the voltage control between supplying gate-to-source to the switch element 24 of each second source circuit 20, thus switch element 24 is controlled as conducting, make the current direction light source 30 from the first power circuit 13 and inductor 23.By switch element 24 is controlled to conducting from cut-off, the electric current flowing through inductor 23 increases, and energy is put aside in inductor 23.
And, control circuit 14 is low level control signal by the voltage control between supplying gate-to-source to the switch element 24 of each second source circuit 20, thus switch element 24 is controlled, into cut-off, cut off the electric current supply from the first power circuit 13 towards light source 30 and inductor 23.By switch element 24 is controlled to cut-off from conducting, the electric current flowing through inductor 23 is supplied to light source 30 via diode 21, and the electric current flowing through inductor 23 reduces, and the energy put aside in inductor 23 is released.
So, each second source circuit 20, by the control signal from control circuit 14, makes switch element 24 conducting and cut-off, carries out work thus as buck circuit.In addition, control circuit 14 makes each second source circuit 20 such as operate with electric current discontinuous mode.
At this, with the length of the power supply wiring 120 of the first power circuit 13 to the link position of each second source circuit 20 from being short to long order, to each second source circuit 20 allocation order.In the example shown in Fig. 3, if consider the length from the power supply wiring 120 the lead-out terminal P0 to the link position P1 ~ Pn of each second source circuit 20-1 ~ n of the first power circuit 13, then second source circuit 20-1 becomes the 1st, second source circuit 20-2 becomes the 2nd, and second source circuit 20-n becomes n-th.
In the supply unit 19 of present embodiment, be at least provided with 1 capacitor between the position on the power supply wiring 120 that the length of the power supply wiring 120 of the first power circuit 13 is longer than the length till the 2nd second source circuit 20 link position P2 and ground connection distribution 121.
In the example shown in Fig. 3, the position Pc between the link position P3 of link position P2 and the 3rd the second source circuit 20-3 of the 2nd second source circuit 20-2 on power supply wiring 120 is provided with 1 capacitor 40.One end of this capacitor 40 is connected with the position Pc on power supply wiring 120, the other end and ground connection distribution 121.
In addition, in the supply unit 19 of present embodiment, due to capacitor 40 be arranged on from the power supply wiring 120 of the first power circuit 13 length than the 2nd second source circuit 20-2 link position P2 till the long power supply wiring 120 of length on position, therefore, such as more than 4 n, capacitor 40 can be set the position on the power supply wiring 120 between the link position Pn-1 of (n-1) individual second source circuit 20-(n-1) and the link position Pn of the n-th second source circuit 20-n.
So, by between the position Pc on the power supply wiring 120 longer than the length of the link position P2 till the 2nd second source circuit 20-2 along the length from the power supply wiring 120 of the first power circuit 13 and ground connection distribution 121,1 capacitor 40 is at least set, thus the path being configured in the high-frequency noise that ratio capacitance device 40 produces further from the second source circuit 20-3 ~ n of the position of the first power circuit 13 on the substrate 12 can be shortened.
Such as when not arranging capacitor 40, as shown in Figure 3, the path of high-frequency noise that second source circuit 20-n produces becomes R1.In contrast, by arranging capacitor 40, the path of the high-frequency noise that second source circuit 20-n produces shortens to the R2 being shorter than R1.And, in second source circuit 20-1 ~ n-1, if arrive the length being shorter in length than the distribution arriving the first power circuit 13 via power supply wiring 120 of the distribution of capacitor 40 via power supply wiring 120, then by the setting of capacitor 40, the path of the high-frequency noise that this second source circuit 20 produces is shortened.
Thus, the inductance composition of the power supply wiring 120 and ground connection distribution 121 comprised in the path of high-frequency noise can be reduced, such as, can expect to reduce the resonance etc. because of power supply wiring 120 and the inductance composition of ground connection distribution 121 and the parasitic capacitance (such as the parasitic capacitance of diode 21) of second source circuit 20 and the high-frequency noise that produces.
In addition, can along from the power supply wiring 120 of the first power circuit 13 length than the 2nd second source circuit 20 link position P2 till length grow power supply wiring 120 on position Pc and ground connection distribution 121 between multiple capacitor is set.Now, if the frequency range that should reduce high-frequency noise is wider, then multiple capacitor 40 with different parameters in this frequency range with capacitance characteristic can be set.
And, for each second source circuit 20, preferably capacitor is arranged between position on following power supply wiring 120 and ground connection distribution 121: the position on this power supply wiring is the position becoming below predetermined length from the shorter side the length of this second source circuit 20 via the distribution till power supply wiring 120 to the first power circuit 13 and the length via the distribution of power supply wiring 120 to capacitor 40.
At this, predetermined length refers to such as because of resonance of parasitic capacitance (such as the parasitic capacitance of diode 21) of comprising in the inductance composition that comprises in the distribution of this length and second source circuit 20 etc. and the high-frequency noise produced becomes the length of the distribution of below pre-sizing.Thereby, it is possible to expect that the high-frequency noise making lighting device 1 produce is reduced to below predetermined value.
Above, the first execution mode is illustrated.
As shown in the above description, lighting device 1 according to the present embodiment, can expect to reduce high-frequency noise.
(the second execution mode)
Fig. 5 is the figure of an example of the circuit structure of the lighting device 1 represented involved by the second execution mode.Such as shown in Figure 5, the position Pc on the power supply wiring 120 between the link position Pk of a kth second source circuit 20-k of the lighting device 1 involved by present embodiment in n (n is the integer of more than 3) second source circuit 20-1 ~ n and the link position Pk+1 of (k+1) individual second source circuit 20-(k+1) at least arranges 1 capacitor.One end of this capacitor 40 is connected with the position Pc on power supply wiring 120, and the other end is connected with ground connection distribution 121.At this, when n is even number, the value of k is such as n/2.Further, when n is odd number, the value of k is such as (n+1)/2.
Thus, in multiple second source circuit 20, can the maximum for the power supply wiring 120 of high-frequency signal and the length of ground connection distribution 121 to the first power circuit 13 or capacitor 40 be suppressed to lower.Thereby, it is possible to the maximum of the stray inductance comprised in reduction distribution, and the high-frequency noise that reduction lighting device 1 produces can be expected.
Fig. 6 is the figure of an example of position for illustration of the capacitor 40 when n=3.When n=3, because n is odd number, thus the value of k is (3+1)/2=2.Therefore, in the example of fig. 6, between the position Pc on the power supply wiring 120 between the link position P3 of link position P2 and the 3rd the second source circuit 20-3 of the 2nd second source circuit 20-2 and ground connection distribution 121,1 capacitor 40 is at least set.
Fig. 7 is the figure of an example of position for illustration of the capacitor 40 when n=6.When n=6, because n is even number, thus the value of k is 6/2=3.Therefore, in the example of fig. 7, between the position Pc on the power supply wiring 120 between the link position P4 of link position P3 and the 4th the second source circuit 20-4 of the 3rd second source circuit 20-3 and ground connection distribution 121,1 capacitor 40 is at least set.
Above, the second execution mode is illustrated.
[modified example]
In addition, the utility model is not be defined as above-mentioned execution mode, can carry out various deformation in the scope of its aim.
Such as, in above-mentioned first execution mode and the second execution mode, from the length of the first power circuit 13 than the 2nd second source circuit 20-2 link position P2 till the long power supply wiring 120 of length on position Pc and ground connection distribution 121 between 1 capacitor 40 is at least set, but the position Pc arranging capacitor 40 is not limited on power supply wiring 120.Such as, in the 2nd later second source circuit 20, can at the link position P of this second source circuit 20, at least arrange 1 capacitor 40 from the position the distribution of this link position P to this second source circuit 20 with ground connection distribution 121.Or, also between hot side in second source circuit 20 (such as connecting the negative pole of diode 21 and the distribution etc. of capacitor 22) and ground connection distribution 121,1 capacitor 40 can be at least set.
Above, some execution modes of present embodiment are illustrated, but these execution modes just illustrate, do not limit the intention of utility model scope.These new execution modes can be implemented in other various mode, in the scope not departing from the utility model aim, can carry out various omission, displacement, change.These execution modes or its distortion all belong in scope of the present utility model or aim, and are also contained in the invention and equivalent scope thereof recorded in technical scheme.
Accompanying drawing explanation
Fig. 1 is the stereogram of an example of the lighting device represented involved by execution mode.
Fig. 2 is the figure of the example representing supply unit.
Fig. 3 is the figure of an example of the circuit structure of the lighting device represented involved by the first execution mode.
Fig. 4 is the figure of an example of the structure representing each second source circuit.
Fig. 5 is the figure of an example of the circuit structure of the lighting device represented involved by the second execution mode.
Fig. 6 is the figure of an example of position for illustration of capacitor when n=3.
Fig. 7 is the figure of an example of position for illustration of capacitor when n=6.
In figure: 12-substrate, 120-power supply wiring, 121-ground connection distribution, 13-first power circuit, 14-control circuit, 19-supply unit, 20-second source circuit, 30-light source, 40-capacitor.
Claims (6)
1. a supply unit, is characterized in that, possesses:
Substrate;
First power circuit, is arranged on described substrate, alternating voltage is converted to direct voltage;
The second source circuit of more than 3, respectively corresponding multiple load and arrange on the substrate, convert predetermined voltage to by the direct voltage be converted to by described first power circuit, be supplied to corresponding load;
Second source circuit described in each is connected in parallel in from the different link position the power supply wiring of described first power circuit extension on the substrate,
With the length of the described power supply wiring of described first power circuit to the described link position of second source circuit described in each from being short to long order, to described in each when second source circuit allocation order, on described power supply wiring the first power circuit described in distance length than the 2nd second source circuit link position till the long position of length and the ground connection distribution on described substrate between, be at least provided with 1 capacitor.
2. supply unit according to claim 1, is characterized in that,
In second source circuit described in each, described capacitor be arranged on described power supply wiring as upper/lower positions and as described between ground connection distribution, the position on described power supply wiring is via the length of the distribution of described power supply wiring to described first power circuit and the position becoming below predetermined length via the shorter side the length of the distribution of described power supply wiring to described capacitor from this second source circuit.
3. supply unit according to claim 1 and 2, is characterized in that,
When the quantity of described second source circuit is n, n is the integer of more than 3, position on described power supply wiring between the link position of the described second source circuit of the kth on described power supply wiring and the link position of kth+1 described second source circuit and between described ground connection distribution, 1 described capacitor is at least set
When n is even number, the value of k is n/2,
When n is odd number, the value of k is (n+1)/2.
4. supply unit according to claim 1 and 2, is characterized in that,
Be provided with 6 described second source circuit on the substrate,
Position on described power supply wiring between the link position of the 3rd described second source circuit on described power supply wiring and the link position of the 4th described second source circuit and between described ground connection distribution, is at least provided with 1 described capacitor.
5. supply unit according to claim 1 and 2, is characterized in that,
Described in each, second source circuit at least has: inductor; Diode; Switch element, during conducting, by the Power supply from described first power circuit to described inductor, during cut-off, cuts off the Power supply from described first power circuit to described inductor, and savings is released via described diode in the energy of described inductor;
Described supply unit also possesses control circuit, and described control circuit makes the control signal of described switching elements conductive and cut-off to the described switch element supply that second source circuit described in each has.
6. a lighting device, is characterized in that, possesses:
Supply unit described in any one in claim 1 to 5;
As the light source of described load.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014037432A JP2015162388A (en) | 2014-02-27 | 2014-02-27 | Power supply device and lighting device |
| JP2014-037432 | 2014-02-27 |
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| Publication Number | Publication Date |
|---|---|
| CN204104187U true CN204104187U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420512419.0U Active CN204104187U (en) | 2014-02-27 | 2014-09-05 | Supply unit and lighting device |
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| JP (1) | JP2015162388A (en) |
| CN (1) | CN204104187U (en) |
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|---|---|---|---|---|
| JP6631904B2 (en) * | 2015-07-13 | 2020-01-15 | パナソニックＩｐマネジメント株式会社 | Lighting device and lighting device using the same |
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- 2014-02-27 JP JP2014037432A patent/JP2015162388A/en active Pending
- 2014-09-05 CN CN201420512419.0U patent/CN204104187U/en active Active
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| JP2015162388A (en) | 2015-09-07 |
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