CN209250926U - Ignition device, luminaire and signboard - Google Patents
Ignition device, luminaire and signboard Download PDFInfo
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- CN209250926U CN209250926U CN201821539337.XU CN201821539337U CN209250926U CN 209250926 U CN209250926 U CN 209250926U CN 201821539337 U CN201821539337 U CN 201821539337U CN 209250926 U CN209250926 U CN 209250926U
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Abstract
The utility model relates to a kind of ignition device, luminaire and signboards.Even if providing the ignition device of the constant-current supply in the way of single-stage converter, change the ignition device that also can steadily work for load.Ignition device (10), have: constant-current supply device (11), alternating current is input to constant-current supply device (11), constant-current supply device (11) carries out the improvement of power factor and the offer of the constant current to load by the electrical power conversion of single-stage；Modulation portion (13), it is arranged between constant-current supply device (11) and the light source (14) of the constant current lighting as provided by constant-current supply device (11), the electric current flowed in light source (14) is made to connect or end with defined modulating frequency (fm)；And low-pass filter (12), it is arranged between modulation portion (13) and constant-current supply device (11), low-pass filter (12) includes the pulsation absorption portion (12a) for absorbing the pulsation for being overlapped in constant current.
Description
Technical field
The utility model relates to apply the ignition device of electric current to the light source of LED etc., have the luminaire of ignition device
Tool and the signboard for having luminaire, more particularly to have the ignition device etc. of the modulation circuit of visible light communication.
Background technique
In recent years, for the ignition device to the light source of LED etc. application electric current, the tune for having visible light communication is proposed
The ignition device of circuit processed (for example, referring to patent document 1).According to such ignition device, lighting device is also logical as data
T unit constructs convenient wireless environment.
(existing technical literature)
(patent document)
Patent document 1: Japanese Unexamined Patent Publication 2014-14119 bulletin
In general, to ignition device etc., using with referred to as PFC (Power Factor Correction) circuit
The constant-current supply of power factor correction circuit.For the implementation method of the constant-current supply with pfc circuit, it may be considered that so-called list
Grade converter mode and two-stage converter mode.The constant-current supply of two-stage converter mode has pfc circuit and constant-current circuit
Isolated two-level configuration, pfc circuit and constant-current circuit are independently controlled respectively.Therefore, for the constant current of two-stage converter mode
The responsiveness of power supply, constant current work is high, and output is stablized, and still, causes at high cost because of two-level configuration, and becomes large size
Change.On the other hand, the constant-current supply of single-stage converter mode, pfc circuit and constant-current circuit are integrally formed, by being utilized
The electrical power conversion of the single-stage of one or the multiple switch element being connected in parallel is able to carry out the improvement of power factor and to load
The offer of constant current therefore can be realized miniaturization and low cost.
However, according to the constant-current supply of single-stage converter mode, if cutting in the modulation circuit of reason visible light communication
It changes caused load change and pulses and be overlapped in output, then for generating shadow of the feed circuit by the pulsation of constant current
It rings, exports unstable.As a result, leading to light source scintillation, alternatively, the input current of constant-current supply is distorted.This is because according to list
The constant-current supply of grade converter mode, for increase power factor, and needs to be used in the switch control of the switch element of electrical power conversion
Making becomes substantially certain relative to the period of AC power source (source power supply), it is difficult to the switch element be made to also respond to load change.
Utility model content
Then, in view of the project, even if the purpose of the utility model is to provide the perseverances in the way of single-stage converter
The ignition device in galvanic electricity source, the ignition device etc. that also can steadily work for load variation.
In order to realize the purpose, the ignition device that one of the embodiments of the present invention are related to, has: constant-current supply
Device, alternating current are input to the constant-current supply device, and the constant-current supply device carries out power by the electrical power conversion of single-stage
The improvement of factor and the offer of the constant current to load；Modulation portion, be arranged on the constant-current supply device with by described
Between the light source of the constant current lighting provided by constant-current supply device, make the electric current flowed in the light source to provide
Modulating frequency connect or cut-off；And low-pass filter, it is arranged between the modulation portion and the constant-current supply device,
The low-pass filter includes pulsation absorption portion, which absorbs the pulsation for being overlapped in the constant current.
Preferably, the constant-current supply device has switch element, the electricity of the single-stage by the way that the switch element is utilized
Power conversion, carries out the improvement of power factor and the offer of the constant current to load.
Preferably, the cutoff frequency of the low-pass filter is the 1/10 or less of the defined modulating frequency.
Preferably, the cutoff frequency of the low-pass filter, the frequency than the alternating current are big.
Preferably, the defined modulating frequency is 9.6kHz.
Preferably, the cutoff frequency of the low-pass filter is 0.96kHz.
Preferably, the pulsation absorption portion, is made of inductor.
Preferably, the impedance of the inductor of the defined modulating frequency is 1/10 or more of the impedance of the light source.
Preferably, the low-pass filter further includes the constant pressure portion for keeping the both end voltage of the light source smooth.
Preferably, the constant pressure portion, is made of capacitor.
In order to realize the purpose, the luminaire that one of the embodiments of the present invention are related to, has: the light
Source, and the ignition device to light source application electric current.
In order to realize the purpose, the signboard that one of the embodiments of the present invention are related to, has: the light source；To
The light source applies the ignition device of electric current；And display board, it is irradiated by the light source, to show text and figure
At least one.
According to the utility model, the ignition device even if the constant-current supply in the way of single-stage converter is provided, for negative
Carry the ignition device etc. that variation also can steadily work.
Detailed description of the invention
Fig. 1 is the block diagram for the ignition device that embodiment 1 is related to.
Fig. 2 is the circuit diagram for the ignition device that embodiment 1 is related to.
Fig. 3 is the figure for showing the filtering characteristic for the low-pass filter that embodiment 1 is related to.
(a) of Fig. 4 is the figure for showing the electric current flowed in the light source that comparative example is related to, and (b) of Fig. 4 is to show comparative example to relate to
And constant-current supply device output electric current figure.
(a) of Fig. 5 is the figure for showing the electric current flowed in the light source that embodiment 1 is related to, and (b) of Fig. 5 is to show embodiment 1
The figure of the output electric current for the constant-current supply device being related to.
Fig. 6 is the outside drawing for the luminaire that the application examples of embodiment 2 is related to.
Fig. 7 is the outside drawing for the signboard that the application examples of embodiment 2 is related to.
Symbol description
10 ignition devices
11 constant-current supply devices
12 low-pass filters
12a pulsation absorption portion
12b constant pressure portion
13 modulation portions
14 light sources
20 luminaires
30 signboards
32 display boards
C3 capacitor
L1 inductor
Specific embodiment
Hereinafter, the embodiments of the present invention are described in detail using attached drawing.Moreover, implementation described below
Example, shows that a specific example of the utility model.It is below implement exemplify numerical value, shape, material, constituent element,
The allocation position of constituent element and connection form etc. are an examples rather than limit the objective of the utility model.Also, it is right
There is no record in the embodiment of upper concept in the constituent element of embodiment below, to show the utility model
Constituent element is illustrated as arbitrary constituent element.Also, the figure that each figure is not necessarily tightly shown.Each
In figure, identical symbol is enclosed to substantially the same structure, repeat description is omitted or simplified.
(embodiment 1)
Firstly, illustrating the ignition device 10 that embodiment 1 is related to.
Fig. 1 is the block diagram for the ignition device 10 that embodiment 1 is related to.Moreover, Fig. 1, which is also shown that ignition device 10, provides friendship
Light source 14 that the AC power source 15 of galvanic electricity and the electric current from ignition device 10 are applied be (load as ignition device 10
Light-emitting component).Ignition device 10 is the function with function and visible light communication to the application of light source 14 electric current (that is, lighting)
Device, have constant-current supply device 11, low-pass filter 12 and modulation portion 13.
Constant-current supply device 11 is the alternating current input for coming from AC power source (source power supply) 15, by being utilized one
The electrical power conversion of the single-stage of multiple switch element that is a or being connected in parallel, the improvement of Lai Jinhang power factor and the perseverance to load
The offer of constant current, the constant-current supply of so-called single-stage converter mode.In the present embodiment, using a switch element, but
It is that, in the case where handling big electric power, also can use the multiple switch element being connected in parallel.
Modulation portion 13 is to be arranged on constant-current supply device 11 and the point of the constant current as provided by constant-current supply device 11
Between the light source 14 of lamp, the modulation circuit that makes the electric current flowed in light source 14 connect or end with defined modulating frequency.It changes
For it, modulation portion 13 is, by the conducting of the electric current flowed in light source 14, the non-conduction modulation switched with defined modulating frequency
Circuit.Moreover, between constant-current supply device 11 and light source 14 it is meant that interval on circuit diagram.That is, modulation portion 13
Equal allocation position can also be not to be between constant-current supply device 11 and light source 14 on substrate.
Low-pass filter 12 is the filter being arranged between constant-current supply device 11 and modulation portion 13.Moreover, constant current
Between power supply device 11 and modulation portion 13 it is meant that interval on circuit diagram.That is, on the substrate of low-pass filter 12 etc.
Allocation position can also be not to be between constant-current supply device 11 and modulation portion 13.
According to this structure, ignition device 10 are able to carry out visible light communication, also become data communication equipment.Also,
Ignition device 10 carries out the offer of the constant current to light source 14, therefore, even if in the series connection for the LED for constituting light source 14
In the case where number change, the forward voltage of each LED can also be remained centainly.
Then, illustrate the particular circuit configurations of ignition device 10.
Fig. 2 is the circuit diagram for the ignition device 10 that embodiment 1 is related to.It is provided moreover, Fig. 2 is also shown that ignition device 10
The AC power source 15 and light source 14 of alternating current.
Constant-current supply device 11, by full-wave rectifier DB1, switch controller SC1, photoelectrical coupler PC1, feedback control electricity
Road FBC1, capacitor C1 and C2, diode D1, transistor Q1, resistance R1 and R2, transformer T1 are constituted.Transistor Q1 is, such as
MOSFET, and for constant-current supply device 11 improvement of power factor carried out from the electrical power conversion of single-stage and to the perseverance of load
One example of the switch element of constant current.Constant-current supply device 11, in the alternating current for coming from AC power source 15 (source power supply)
After (for example, exchange 100V) is by full-wave rectifier DB1 full-wave rectification, by the crystal with the series connection of the first winding of transformer T1
The switch work of pipe Q1, transmits electric energy to secondary side, exports direct current by diode D1 and capacitor C2 (smoothing capacity device).
Capacitor C1 and resistance R1 are, for protecting transistor Q1 from the member of the back voltage generated in transformer T1
Part.
Switch controller SC1 carries out the switch work of transistor Q1 according to the control signal from feedback control circuit FBC1
Make.Specifically, switch controller SC1 and feedback control circuit FBC1, carries out feedback control, thus in AC power source 15
A cycle makes the turn-on time of transistor Q1 become substantially certain, also, makes to become mesh to the output electric current Iout of light source 14
Scale value.More specifically, feedback control circuit FBC1, will be with Iout pairs of output electric current being detected by resistance R2 (detection resistance)
The signal answered notifies to give switch controller SC1 via photoelectrical coupler PC1, to carry out feedback control.Accordingly, power is carried out
The improvement of factor and the offer of the constant current to load (light source 14).Moreover, constant-current supply device 11 is, as shown in Figure 2,
Insulated type feedback transducer, but it is also possible to be realized by boost chopper.
Light source 14, for example, being made of the multiple LED1 to LED5 being connected in series.Moreover, the light-emitting component of light source 14 is constituted,
It is not limited only to LED, is also possible to other light-emitting components of organic EL, inorganic EL etc..Also, light source 14 is not limited only to connect
Multiple LED of connection, can also be made of a LED, can also be made of the multiple LED being connected in parallel, can also the company of series connection
The multiple LED groups connect are connected in parallel to constitute.
Modulation portion 13 is, connects transistor Q2 as switch element or cut-off according to the signal that visible light communication is used
Modulation circuit.Modulation portion 13 is made of constant voltage regulator REG1, microcomputer (microcomputer) MCU1, transistor Q2.For modulation
The modulation system in portion 13 uses such as 4 value pulse position modulations (4PPM).
Transistor Q2, is the switch element of visible light communication, for example, being MOSFET.By transistor Q2, make light source 14 with
Such as 9.6kHz high speed as defined modulating frequency becomes connection or cut-off, to carry out light modulation.People cannot perceive with
Therefore ignition device 10 can be used to utilize, also, make by the connection or cut-off of the light source 14 of 9.6kHz as general illumination
It is utilized for data communication equipment.
Constant voltage regulator REG1 is, according to the output voltage of constant-current supply device 11, to generate for making in modulation portion 13
The circuit module of the supply voltage of the constant pressure of the circuit work in portion.Constant voltage regulator REG1 is, for example, the supply voltage of output 5V
Small-sized switching regulaor or series controller etc..
Microcomputer MCU1 is the microcomputer for the supply voltage work that reason constant voltage regulator REG1 is generated.Microcomputer MCU1
Be, for example, by the ROM of holding program, as temporary storage region RAM, execute the processor of program, analog-digital converter with
And the LSI of the compositions such as imput output circuit, counter/timer of digital analog converter etc..Microcomputer MCU1, as modulation circuit
A part functions.Specifically, microcomputer MCU1 is exported according to built-in program for the letter according to visible light communication
Connect transistor Q2 or the driving signal of cut-off.The signal of visible light communication is the fixation determined by built-in program
Character string or the character string dynamically changed etc..Hereby it is possible to send identification signal from light source 14.
Low-pass filter 12, from absorption be overlapped in the pulsation of the constant current provided to light source 14 pulsation absorption portion 12a,
And the constant pressure portion 12b for keeping the both end voltage of light source 14 smooth is constituted.For example, pulsation absorption portion 12a, by being connected in series in constant current
Inductor L1 between power supply device 11 and modulation portion 13 is constituted, constant pressure portion 12b, is connected by parallel with modulation portion 13 and light source 14
The capacitor C3 connect is constituted.That is, low-pass filter 12 is, LC filter.It is described in detail later, still, by
Low-pass filter 12 inhibits the electric to output of curent change precipitous because of caused by the switching of the transistor Q2 in modulation portion 13
Flow the influence of Iout.
Moreover, constant-current supply device 11, low-pass filter 12, modulation portion 13 and light source 14, can also be arranged on one
On a substrate, it can also be arranged on part or all on other substrates.
Here, illustrating the filtering characteristic of low-pass filter 12.
Fig. 3 is the figure for showing the filtering characteristic for the low-pass filter 12 that embodiment 1 is related to.Specifically, Fig. 3 is shown, it is low
The gain characteristic of bandpass filter 12.Fm shows the defined modulation frequency when Q2 of the transistor in modulation portion 13 being made to connect or end
Rate, fc are shown, the cutoff frequency of low-pass filter 12.
The cutoff frequency fc of low-pass filter 12 be, it is specified that modulating frequency fm 1/10 or less.For example, defined modulation
Frequency fm is that 9.6kHz as described above, cutoff frequency fc is 0.96kHz.And, it is preferred that cutoff frequency fc, than exchange
The frequency (50Hz or 60Hz) of power supply 15 is small.But low pass is constituted in a manner of the frequency content also to end AC power source 15
In the case where filter 12, the size of inductor L1 etc. increases, and therefore, in the present embodiment, cutoff frequency fc compares AC power source
15 frequency is big.
Also, the impedance of the inductor L1 of defined modulating frequency fm is 1/10 or more of the impedance of light source 14.By light
The impedance in source 14 is set as Zo, and the both end voltage of light source 14 is set as VLED, the electric current flowed in light source 14 is set as If, by inductance
The impedance of device L1 is set as ZL, in the case that the inductance of inductor L1 is set as L, is expressed as Zo=VLED/If, is expressed as ZL=2
π·fm·L.Also, impedance Z L and the relational expression of impedance Z o become, ZL >=Zo/10.It is 9.6kHz in defined modulating frequency fm
When, the inductance L for becoming the inductor L1 of ZL=Zo/10 is, such as 1mH.In this way, becoming light source 14 with the impedance Z L of inductor L1
1/10 or more the mode of impedance Z o design the inductance L of inductor L1, to realize the filter function of low-pass filter 12.
Then, illustrate the electric current If flowed in light source 14 and export electric current Iout's from the output of constant-current supply device 11
Current waveform.Firstly, as comparative example, illustrate electric current If when the pulsation absorption portion 12a short circuit of low-pass filter 12 and defeated
The current waveform of electric current Iout out.
(a) of Fig. 4 is the figure for showing the electric current If flowed in the light source 14 that comparative example is related to, and (b) of Fig. 4 is to show to compare
The figure of the output electric current Iout for the constant-current supply device 11 that example is related to.
As shown in (a) of Fig. 4, in electric current If, periodically occur repeatedly the connection of the transistor Q2 of modulation portion 13 with
And cut-off, to generate precipitous curent change.In a comparative example, pulsation absorption portion 12a short circuit, therefore, electric current If's is precipitous
Curent change, as shown in (b) of Fig. 4, as pulsation be overlapped in output electric current Iout.
Feedback control circuit FBC1 responds high gain when being substantially designed as below the frequency of AC power source 15, but
It is such as -40dB or so being response gain when being designed to even if more than the frequency, it is many to respond.This is, in response to
The raising of speed and overshoot inhibit and design.Therefore, as shown in (b) of Fig. 4, it is overlapped in output electric current Iout's in pulsation
In the case of, feedback control circuit FBC1 also responds to the pulsation.Accordingly, also progress corresponding with the pulsation is brilliant by switch controller SC1
The switching of body pipe Q1, therefore, the duty ratio of the switching of transistor Q1 generate disorder, and the current constant control of constant-current supply device 11 is unstable
It is fixed.
Then, when illustrating the pulsation absorption portion 12a of low-pass filter 12 without short circuit, the electric current If of the present embodiment and
Export the current waveform of electric current Iout.
(a) of Fig. 5 is the figure for showing the electric current If flowed in the light source 14 that embodiment 1 is related to, and (b) of Fig. 5 is to show reality
Apply the figure of the output electric current Iout for the constant-current supply device 11 that example 1 is related to.
It is same as comparative example as shown in (a) of Fig. 5, in electric current If, periodically occur the crystal of modulation portion 13 repeatedly
The connection and cut-off of pipe Q2, to generate precipitous curent change.In the present embodiment, the precipitous electric current of electric current If becomes
Change, it is also several to be overlapped in output electric current Iout as shown in (b) of Fig. 5.But, it is seen then that by pulsation absorption portion 12a Absorbing Fluctuation,
To significantly inhibit the vibration because of caused by the precipitous curent change of electric current If compared with comparative example.Therefore, Constant Electric Current
The current constant control of source device 11 is stablized.
Described above, the ignition device 10 that the present embodiment is related to, has: constant-current supply device 11, alternating current is input to perseverance
Galvanic electricity source device 11 carries out the improvement of power factor and the offer of the constant current to load by the electrical power conversion of single-stage；
Modulation portion 13 is arranged on the light source 14 of constant-current supply device 11 Yu the constant current lighting as provided by constant-current supply device 11
Between, so that the electric current flowed in light source 14 is connected or is ended with defined modulating frequency fm；And low-pass filter 12, it is set
It sets between modulation portion 13 and constant-current supply device 11.Low-pass filter 12 includes absorbing the pulsation for being overlapped in constant current
Pulsation absorption portion 12a.
In the ignition device of the constant-current supply in the way of single-stage converter, if the modulation portion of reason visible light communication
Load change caused by 13 switching and pulsing is overlapped in constant current (output electric current Iout), then for generating constant current
Feed circuit (such as switch controller SC1 and feedback control circuit FBC1) is influenced by the pulsation, and current constant control is unstable
It is fixed.In this regard, ignition device 10, the pulsation absorption portion 12a for including by low-pass filter 12 absorbs the pulsation, therefore, even if utilizing
The constant-current supply device 11 of single-stage converter mode also can steadily work for load change.Therefore, it can be realized utilization
The constant-current supply of single-stage converter mode, can steadily work and smaller than two-stage converter mode for load change
The ignition device of type and low cost.
Also, the cutoff frequency fc of low-pass filter 12 is also possible to 1/10 or less defined modulating frequency fm.
Accordingly, it is specified that modulating frequency fm therefore, can than big 10 times of cutoff frequency fc or more of low-pass filter 12
The frequency content of modulating frequency fm as defined in effectively interdicting.
Also, pulse absorption portion 12a can also be to be made of inductor L1.
Hereby it is possible to be easy to realize pulsation absorption portion 12a by inductor.
Also, the impedance Z L of the inductor L1 of defined modulating frequency fm is also possible to the 1/10 of the impedance Z o of light source 14
More than.
Hereby it is possible to effectively absorb pulsation.Also, in the case where low-pass filter 12 is made of LC filter, electricity
The impedance (inductance) of sensor L1 is bigger, and the capacitor of capacitor C3 can make the size of capacitor C3 become smaller with regard to smaller.
Also, low-pass filter 12 can also further include, and make the constant pressure portion 12b that the both end voltage of light source 14 is smooth.
Accordingly, the both end voltage of light source 14 is smooth, being capable of more effectively Absorbing Fluctuation.
Also, constant pressure portion 12b can also be to be made of capacitor C3.
Hereby it is possible to be easy to realize constant pressure portion 12b by capacitor.
(embodiment 2)
Then, as embodiment 2, illustrate the application examples for the ignition device 10 that the embodiment is related to.
Fig. 6 is the outside drawing for the luminaire 20 that the application examples of embodiment 2 is related to.Luminaire 20 is arranged in room
Ceiling, wall or pillar etc. spotlight, have circuit box 21, lamp body 22 and wiring 23.Circuit box 21 is to store institute
State the box body for the ignition device 10 that embodiment is related to.Lamp body 22 stores the LED bulb as light source 14.Wiring 23 is, by circuit
One example of the load wiring that box 21 is electrically connected with the LED bulb for being accommodated in lamp body 22.
Such luminaire 20 has the ignition device 10 that the embodiment is related to, therefore, while carry out illumination and can
Light-exposed communication.
Moreover, in detail in this figure, as luminaire 20, spotlight is shown, and still, the application examples as ignition device 10
The luminaire being related to, is not limited only to spotlight.Be also possible to pendent lamp, ceiling lamp, desk lamp, Japanese illumination, bracket lamp, footlights,
Pendant lamp, basic illumination, downlight, kitchen lamp, bathroom light, external modulation etc..
Fig. 7 is the outside drawing for the signboard 30 that the application examples of embodiment 2 is related to.Signboard 30 has, and stores as light source 14
Shell 31, the Yi Jixian of LED bulb (not illustrating) and the ignition device 10 being related to the embodiment that LED bulb applies electric current
Show plate 32.Display board 32 is, irradiates from the back side by light source 14 (LED bulb etc.), come show text and figure at least one
Display board, for example, being to beat to have carved the translucent resin substrate of text.
Such signboard 30 has the ignition device 10 that the embodiment is related to, therefore, while carrying out the text of display board 32
The display of word etc. and visible light communication.In visible light communication, for example, show display board 32 display text data and/
Or the data overlap of the set-up site of signboard 30 is shown and is sent in illumination light.
Moreover, LED and display board 32 as light source 14 are separately formed in the signboard 30 of Fig. 7, but it is also possible to
It is formed as one.Can also be in shell 31, be arranged multiple LED, the illuminant colour of these multiple LED is controlled, from
And make multiple LED as display board, show text and figure at least one.
(other embodiments)
More than, for the utility model relates to ignition device, luminaire and signboard, according to embodiment 1 and 2 into
Explanation is gone, still, the utility model is not limited only to these embodiments.Without departing from the objective of the utility model, to implementation
Example 1 and 2 implements form and any combination embodiment 1 and 2 obtained from the various modifications that those skilled in the art expect
A part constituent element come the other forms constructed, be also contained in the scope of the utility model.
For example, in the described embodiment, low-pass filter 12 is π type LC filter, it however, it can be other ladders
Mode filter.
Also, for example, pulsation absorption portion 12a be inductor, still, if having absorb with provided to light source 14 it is constant
The function of the pulsation of current superimposition is then also possible to the resistor of rheostat etc..
Also, for example, constant pressure portion 12b is capacitor, still, if having the function of keeping the both end voltage of light source 14 smooth,
Then it is also possible to zener diode or resistor etc..
Claims (12)
1. a kind of ignition device, which is characterized in that have:
Constant-current supply device, alternating current are input to the constant-current supply device, the electric power that the constant-current supply device passes through single-stage
Conversion, carries out the improvement of power factor and the offer of the constant current to load；
Modulation portion is arranged on the constant-current supply device and the constant current point as provided by the constant-current supply device
Between the light source of lamp, the electric current flowed in the light source is made to connect or end with defined modulating frequency；And
Low-pass filter is arranged between the modulation portion and the constant-current supply device,
The low-pass filter includes pulsation absorption portion, which absorbs the pulsation for being overlapped in the constant current.
2. ignition device as described in claim 1, which is characterized in that
The constant-current supply device has switch element,
By the way that the electrical power conversion of the single-stage of the switch element is utilized, the improvement of power factor is carried out and to the constant of load
The offer of electric current.
3. ignition device as described in claim 1, which is characterized in that
The cutoff frequency of the low-pass filter is the 1/10 or less of the defined modulating frequency.
4. ignition device as described in claim 1, which is characterized in that
The cutoff frequency of the low-pass filter, the frequency than the alternating current are big.
5. ignition device as described in claim 1, which is characterized in that
Modulating frequency as defined in described is 9.6kHz.
6. ignition device as described in claim 1, which is characterized in that
The cutoff frequency of the low-pass filter is 0.96kHz.
7. ignition device as described in claim 1, which is characterized in that
The pulsation absorption portion, is made of inductor.
8. ignition device as claimed in claim 7, which is characterized in that
The impedance of the inductor of modulating frequency as defined in described is 1/10 or more of the impedance of the light source.
9. such as described in any item ignition devices of claim 1 to 8, which is characterized in that
The low-pass filter further includes the constant pressure portion for keeping the both end voltage of the light source smooth.
10. ignition device as claimed in claim 9, which is characterized in that
The constant pressure portion, is made of capacitor.
11. a kind of luminaire, which is characterized in that have:
The light source；And
Apply described in any item ignition devices of the claims 1 to 10 of electric current to the light source.
12. a kind of signboard, which is characterized in that have:
The light source；
Apply described in any item ignition devices of the claims 1 to 10 of electric current to the light source；And
Display board is irradiated by the light source, come show text and figure at least one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-184048 | 2017-09-25 | ||
| JP2017184048A JP6895642B2 (en) | 2017-09-25 | 2017-09-25 | Lighting devices, lighting fixtures and signboards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209250926U true CN209250926U (en) | 2019-08-13 |
Family
ID=66176693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821539337.XU Active CN209250926U (en) | 2017-09-25 | 2018-09-19 | Ignition device, luminaire and signboard |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6895642B2 (en) |
| CN (1) | CN209250926U (en) |
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| JP2007080771A (en) * | 2005-09-16 | 2007-03-29 | Nec Lighting Ltd | Low voltage power supply circuit for lighting, lighting device, and method of outputting power of low voltage power supply for lighting |
| JP6145928B2 (en) * | 2013-04-25 | 2017-06-14 | パナソニックＩｐマネジメント株式会社 | Visible light communication device and lighting apparatus using the same |
| JP2016058148A (en) * | 2014-09-05 | 2016-04-21 | パナソニックＩｐマネジメント株式会社 | Visible light communication modulation circuit, lighting equipment, luminaire and visible light communication system |
| JP6332629B2 (en) * | 2014-09-11 | 2018-05-30 | 岩崎電気株式会社 | LED power supply and LED lighting device |
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2017
- 2017-09-25 JP JP2017184048A patent/JP6895642B2/en active Active
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2018
- 2018-09-19 CN CN201821539337.XU patent/CN209250926U/en active Active
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| Publication number | Publication date |
|---|---|
| JP2019061798A (en) | 2019-04-18 |
| JP6895642B2 (en) | 2021-06-30 |
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