CN107635330A - Light modulating device and dimming lamp - Google Patents
Light modulating device and dimming lamp Download PDFInfo
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Abstract
The present invention relates to a kind of light modulating device, and it includes positive output terminals, negative output terminals, rectification filtering module and light modulation drive module, and positive output terminals are used for the positive pole for connecting lighting source, and negative output terminals are used for the negative pole for connecting lighting source；First output end of rectification filtering module is connected with the input and positive output terminals for dimming drive module respectively, second output end of rectification filtering module is connected with the ground terminal, first output end of light modulation drive module is connected with negative output terminals, wherein, light modulating device also includes shunt circuit, the first end of shunt circuit is connected with negative output terminals, and the second end of shunt circuit is connected with the ground terminal；The impedance of shunt circuit is R, and 0 ＜ R ＜ P/ (I*I), P are default power threshold, and I is the electric current in lighting source loop corresponding to default power threshold.Using the present invention, the problem of traditional dimming lamp flashes in low-light level can solve the problem that.
Description
Technical field
The present invention relates to lighting control technique field, more particularly to a kind of light modulating device and dimming lamp.
Background technology
Light modulating device is a kind of device that can adjust lamplight brightness, can apply to a variety of light fixtures such as incandescent lamp, LED
Light modulation.
In general, the dim signal of light modulating device output can have slight fluctuation, be filled using light modulation common at present
Put and dimmed, when the brightness of light source is adjusted to relatively low brightness, for example, when using the more multistage light modulating device of series
During by the regulation of the luminosity of light source to the relatively low grade of brightness, or, when using stepless dimming device by the luminance of light source
When degree is adjusted close to zero, because the brightness change of light source caused by the fluctuation of dim signal is obvious, human eye is easily seen
Observe obvious scintillation.
The content of the invention
Based on this, it is necessary to provide a kind of light modulating device and dimming lamp, can solve the problem that dimming lamp holds in low-light level
The problem of easily flashing.
A kind of light modulating device, including positive output terminals, negative output terminals, rectification filtering module and light modulation driving mould
Block, the positive output terminals are used for the positive pole for connecting lighting source, and the negative output terminals are used to connect the illumination light
The negative pole in source, the ground terminal are used to be grounded；First output end of the rectification filtering module drives with the light modulation respectively
The input of module and positive output terminals connection, the second output end and the ground terminal of the rectification filtering module
Connection, the first output end of the light modulation drive module are connected with the negative output terminals, and the light modulating device also includes dividing
Current circuit, the first end of the shunt circuit are connected with the negative output terminals, the second end of the shunt circuit with it is described
Ground terminal connects；The impedance of the shunt circuit is R, wherein 0 ＜ R ＜ P/ (I*I), P are default power threshold, I is pre-
If power threshold corresponding to electric current in lighting source loop.
In one of the embodiments, the shunt circuit includes at least one resistance.
In one of the embodiments, the light modulating device also includes on-off circuit, the on-off circuit and the shunting
Circuit connected in series.
In one of the embodiments, the on-off circuit includes controlled end, the first connection end and second connection end, described
Controlled end is connected with the second output end of the light modulation drive module, and first connection end connects with the negative output terminals
Connect, the second connection end is connected with the ground terminal.
In one of the embodiments, the on-off circuit is triode, and the base stage of the triode is driven with the light modulation
The second output end connection of dynamic model block, the colelctor electrode of the triode are connected with the second end of the shunt circuit, three pole
The emitter stage of pipe is connected with the ground terminal.
In one of the embodiments, the on-off circuit is field-effect transistor, the grid of the field-effect transistor
It is connected with the second output end of the light modulation drive module, the drain electrode of the field-effect transistor and the second of the shunt circuit
End connection, the source electrode of the field-effect transistor are connected with the ground terminal.
In one of the embodiments, the on-off circuit is IGCT, the control pole of the IGCT and the light modulation
The second output end connection of drive module, the anode of the IGCT are connected with the second end of the shunt circuit, the brilliant lock
The negative electrode of pipe is connected with the ground terminal.
In one of the embodiments, the light modulation drive module includes power supply circuit, controller and dimming driver；Institute
The first input end of power supply circuit is stated as input and the rectification filtering module of the light modulation drive module first is defeated
Go out end connection, the second input of the power supply circuit is connected with the ground terminal, the output end connection of the power supply circuit
The input of the controller；First output end of the controller connects the input of the dimming driver, the light modulation
The output end of driver is connected as the first output end of the light modulation drive module with the negative output terminals.
In one of the embodiments, the second output end of the controller is as the second defeated of the light modulation drive module
Go out end to be connected with the controlled end of the on-off circuit.
A kind of dimming lamp, including lighting source and the light modulating device described in any one as described above, the lighting source
Positive pole is connected with the positive output terminals of the light modulating device, and the negative pole of the negative pole of the lighting source and the light modulating device is defeated
Go out terminal connection.
In the embodiment of the present invention, dimmed by the shunt circuit in parallel of the first output end with dimming drive module to adjust
Device is exported to the size of current of lighting source, can light modulating device export electric current is smaller, lighting source brightness is relatively low
When, ensure the actual power of lighting source higher than the performance number that may be flashed so that lighting source, which can be stablized, to be dimmed, solution
The problem of traditional dimming lamp of having determined flashes in low-light level.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
The accompanying drawing of other embodiment is obtained according to these accompanying drawings.
Fig. 1 is the circuit module schematic diagram of the light modulating device of one embodiment of the invention；
Fig. 2 is the circuit module schematic diagram of the light modulating device of another embodiment of the present invention；
Fig. 3 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 4 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 5 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 6 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 7 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 8 is the circuit module schematic diagram of the light modulating device of further embodiment of this invention；
Fig. 9 is the circuit module schematic diagram of the dimming lamp of one embodiment of the invention.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Add thorough and comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more
The arbitrary and all combination of related Listed Items.
As shown in figure 1, its circuit module schematic diagram for the light modulating device 10 of one embodiment of the invention.The light modulating device 10
Including ground terminal, positive output terminals 110, negative output terminals 120, rectification filtering module 130, light modulation drive module 140
With shunt circuit 150, wherein positive output terminals 110 are used for the positive pole for connecting lighting source, and negative output terminals 120 are used to connect
The negative pole of lighting source is connect, ground terminal is used to be grounded.
First output end of rectification filtering module 130 respectively with dim drive module 140 input and cathode output end
Son 110 is connected, and the second output end of rectification filtering module 130 is connected with ground terminal.Wherein, rectification filtering module 130 is defeated
Enter end and be used for incoming transport electricity, such as the input of rectification filtering module 130 is used to access civil power.Rectification filtering module 130 is used
Rectification processing and filtering process are carried out in the alternating current to access.
Wherein, light modulation drive module 140 includes at least one output end, such as light modulation drive module 140 is including at least the
One output end, the first output end of light modulation drive module 140 are connected with negative output terminals 120.Light modulation drive module 140 is used for
Dim signal is exported, the dim signal is used for the luminosity for adjusting lighting source.For example, the dim signal is current signal,
When current signal is bigger, the luminosity of lighting source is bigger；When current signal is smaller, the luminosity of lighting source is got over
It is small.
One end of shunt circuit 150 is connected with negative output terminals 120, the other end and ground terminal of shunt circuit 150
Connection.Wherein, the impedance of shunt circuit 150 is designated as R, wherein 0 ＜ R ＜ P/ (I*I), P are default power threshold, I is default
Power threshold corresponding to electric current in lighting source loop.
In practical application, electric current after the first output end and lighting source of rectification filtering module, splits into two successively
Individual branch current, the loop that a branch current is formed by light modulation drive module by ground terminal and rectification filtering module,
The loop that another branch current is formed by shunt circuit by ground terminal and rectification filtering module, therefore, flows through illumination
The circuit size of light source is equal to the road electric current sum of above-mentioned two, i.e. the electric current of lighting source is equal to the of light modulation drive module
The output current of one output end and the electric current sum of shunt circuit.
In traditional light modulating device, the electric current exported to lighting source is identical with the output current for dimming drive module,
When dimming the output current of drive module close to 0, the power of lighting source is smaller, obvious scintillation occurs.And this
In inventive embodiments, exported by the shunt circuit in parallel of the first output end with dimming drive module to adjust light modulating device 10
To the size of current of lighting source.When dimming the electric current of the first output end output of drive module close to 0, light modulating device 10
Export to the electric current of lighting source and be approximately equal to the size of current for flowing through shunt circuit.Due to the impedance R ＜ P/ of shunt circuit 150
(I*I), wherein P is default power threshold, and I is the electric current in lighting source loop corresponding to default power threshold, therefore
The power P of lighting source '=I*I*R ＞ P, such as P is the peak power that lighting source may flash, when lighting source
When power is more than the power threshold, lighting source will not flash.
Using the embodiment of the present invention, can when in electric current that light modulating device 10 exports, smaller, lighting source brightness is relatively low,
Ensure the actual power of lighting source higher than the performance number that may be flashed so that lighting source, which can be stablized, to be dimmed, and is solved
The problem of traditional dimming lamp flashes in low-light level.
In one of the embodiments, rectification filtering module 130 may include rectification circuit and filter circuit, and rectification circuit can
Think bridge rectifier, such as full-wave bridge rectifier circuit.Rectification circuit is used to alternating current being converted to direct current, such as will
Alternating current is converted to Rectified alternating current.Filter circuit can be capacitor filter or RC filter circuits or LC filter circuits.Filter
Wave circuit is connected to the output end of rectification circuit, is filtered out for the alternating component in the electric signal that exports rectification circuit, retains
Flip-flop.
Alternatively, mu balanced circuit is may also include in rectification filtering module 130, mu balanced circuit is connected to the output of filter circuit
End, for the DC voltage stability of output in certain amplitude range, to be kept into output voltage not with AC network and load
Change and change.
In one embodiment, shunt circuit 150 includes at least one resistance.For example, shunt circuit 150 is an electricity
Resistance, either shunt circuit 150 is made up of the multiple resistance being mutually in series or shunt circuit 150 is by multiple electricity for being mutually in parallel
Resistance composition, or shunt circuit 150 are made up of the resistance of multiple series/parallels.
, can be according to above-mentioned power threshold, the parameter of rectification filtering module and light modulation drive module in a practical application
The impedance of parameter setting shunt circuit 150.Alternatively, it is determined that above-mentioned power threshold, selected rectification filtering module and light modulation are driven
After dynamic model block, the optimum impedance of shunt circuit can be determined by debugging, so as to select the resistance of respective resistance values as shunting electricity
Road.
In one embodiment, as shown in Fig. 2 light modulating device 10 also includes on-off circuit 160, on-off circuit 160 is with dividing
Current circuit 150 is connected.When on-off circuit 160 turns on, shunt circuit 150 is with dimming the first output end of drive module 140 simultaneously
Connection, light modulating device 10 export the first output end of the electric current for being equal to shunt circuit to the electric current of lighting source and light modulation drive module
Output current sum, by the Power Control of lighting source more than may the power bracket that flash, equivalent to opening
Anti- flashing function.When on-off circuit 160 disconnects, there is no electric current to pass through the output of light modulating device 10 to illumination on shunt circuit 150
The electric current of light source is equal to the output current of the first output end of light modulation drive module, equivalent to closing anti-flashing function.This reality
Apply in example, by on-off circuit, can decide whether to enable anti-flashing function as needed.For example, when the luminance of lighting source
When degree is higher, it will not flash, anti-flashing function can be closed by disconnecting on-off circuit；When the luminance of lighting source
When spending relatively low, it may occur however that flicker, anti-flashing function can be opened by closure switch circuit.Wherein, on-off circuit 160 can
Elect manual switch circuit 160 or controlled switching circuit 160 as.
In one embodiment, on-off circuit 160 is manual switch circuit, and shunt circuit 150 is operated with manual switches circuit
160 are connected with ground terminal.So, user can be according to being actually needed to manually select whether start anti-flashing function.
In one embodiment, it is split for exporting as shown in figure 3, light modulation drive module 140 also includes the second output end
The switch controlling signal on powered-down road.On-off circuit 160 is controlled switching circuit, and the controlled switching circuit includes controlled end, first
Connection end and second connection end, wherein controlled end are connected with dimming the second output end of drive module 140, the first connection end and the
Connected with shunt circuit 150 two connection ends.Such as first connection end and second connection end be connected to the second end of shunt circuit 150
Between ground terminal；Or first connection end and second connection end be connected to negative output terminals 120 and shunt circuit 150
Between first end.Specifically, the switch controlling signal that controlled end exports according to the second output end of light modulation drive module 140, control
Make and be Turned on/off state between the first connection end and second connection end.For example, the second output end of light modulation drive module 140
Opening control signal or shut-off control signal are exported according to the output current size of its first output end, when light modulation drive module
When the output current of 140 the first output end is less than predetermined current threshold, the second output end output of light modulation drive module 140 is opened
Open control signal, the controlled end of on-off circuit 160 according to the opening control signal control the first connection end and second connection end it
Between turn on, so as to open anti-flashing function.When the output current of the first output end of light modulation drive module 140 is more than or equal in advance
If during current threshold, the second output end output shut-off control signal of light modulation drive module 140, the controlled end of on-off circuit 160
The separated of first connection end and second connection end is controlled according to the shut-off control signal, so as to close anti-flashing function.
Wherein, controlled switching circuit is optionally triode, field-effect transistor, IGCT, relay etc..Below with by
First connection end of control on-off circuit and second connection end are entered exemplified by being connected between the second end of shunt circuit and ground terminal
Row explanation.
By taking triode as an example, as shown in figure 4, on-off circuit 160 is triode, base stage and the light modulation drive module of triode
140 the second output end connection, the colelctor electrode of triode is connected with the second end of shunt circuit 150, the emitter stage of triode and
Ground terminal connects.Now, the second output end of light modulation drive module 140 exports the electricity for controlling triode ON/shut-off
Ordinary mail number.When triode ON, current loop can be formed by shunt circuit, equivalent to the anti-flashing function of unlatching；When three poles
When pipe turns off, the current loop by shunt circuit can not be formed, equivalent to the anti-flashing function of closing.
By taking field-effect transistor as an example, as shown in figure 5, on-off circuit 160 is field-effect transistor, field-effect transistor
Grid is connected with dimming the second output end of drive module 140, the drain electrode of field-effect transistor and the second end of shunt circuit 150
Connection, the source electrode of field-effect transistor are connected with ground terminal.Preferably, field-effect transistor is metal-oxide-semiconductor.Now, light modulation is driven
Second output end of dynamic model block 140 exports the level signal for controlling field-effect transistor ON/OFF.Work as field effect transistor
When pipe turns on, current loop can be formed by shunt circuit, equivalent to the anti-flashing function of unlatching；When field-effect transistor turns off
When, the current loop by shunt circuit can not be formed, equivalent to the anti-flashing function of closing.
By taking IGCT as an example, as shown in fig. 6, on-off circuit 160 is IGCT, control pole and the light modulation driving mould of IGCT
The second output end connection of block 140, the anode of IGCT are connected with the second end of shunt circuit 150, and the negative electrode of IGCT is with connecing
Ground terminal connection.Now, the second output end of light modulation drive module 140 exports the level for controlling turn on thyristors/shut-off
Signal.On the spot during turn on thyristors, current loop can be formed by shunt circuit, equivalent to the anti-flashing function of unlatching；When brilliant lock
When pipe turns off, the current loop by shunt circuit can not be formed, equivalent to the anti-flashing function of closing.
In one embodiment, as shown in fig. 7, light modulation drive module 140 includes power supply circuit 141, controller and 142 tune
CD-ROM driver 143；Wherein input and rectifying and wave-filtering of the first input end of power supply circuit 141 as light modulation drive module 140
The first output end connection of module 130, the second input of power supply circuit 141 is connected with ground terminal, power supply circuit 141 it is defeated
Go out the input of end connection controller 142；The input of the first output end connection dimming driver 143 of controller 142, light modulation
The output end of driver 143 is connected as the first output end of light modulation drive module 140 with negative output terminals 120.
In the present embodiment, power supply circuit 141 is used for the work for controller 142 by the voltage conversion of rectification filtering module output
Make voltage, powered for controller 142.Controller 142 is used to export dimming control signal, and dimming driver 143 is used for basis should
Dimming control signal exports correspondingly sized light modulation electric current, so as to adjust the luminosity of lighting source.Wherein, lighting source is worked as
For LED light source when, dimming driver be preferably PWM (Pulse Width Modulation, pulse width modulation) light modulation drive
Dynamic device.
In one embodiment, when on-off circuit 160 is controlled switching circuit 160, as shown in figure 8, controller 142
Second output end is connected as the second output end of light modulation drive module 140 with the controlled end of on-off circuit 160.Now, control
Second output end of device 142 is used for the control signal of output switch circuit 160, with the ON/OFF shape of controlling switch circuit 160
State.It is used to control triode, field-effect transistor, IGCT, relay for example, the second output end of controller 142 is exportable
Etc. the control signal of element conductive/shut-off, so as to control the anti-flashing function of the on/off of light modulating device 10.
Present invention also offers a kind of dimming lamp, as shown in fig. 9, it includes lighting source 20 and as described above any implementation
Light modulating device 10 described in example, the wherein positive pole of lighting source 20 are connected with the positive output terminals 110 of the light modulating device 10,
The negative pole of the lighting source 20 is connected with the negative output terminals 120 of the light modulating device 10.
The dimming lamp of the embodiment of the present invention, the actual power of lighting source can be ensured higher than the work(that may be flashed
Rate value so that lighting source can be dimmed stably, solve the problems, such as that traditional dimming lamp flashes in low-light level.
, can be with when an element is considered as " connection " another element it should be noted that in embodiment described above
It is directly to another element or may be simultaneously present intermediary element.On the contrary, when element for be referred to as " direct " with it is another
When element connects, in the absence of intermediary element.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of light modulating device, including positive output terminals, negative output terminals, ground terminal, rectification filtering module and light modulation
Drive module, the positive output terminals are used for the positive pole for connecting lighting source, and the negative output terminals are described for connecting
The negative pole of lighting source, the ground terminal are used to be grounded；
First output end of the rectification filtering module exports with the input of the light modulation drive module and the positive pole respectively
Terminal connects, and the second output end of the rectification filtering module is connected with the ground terminal, described to dim the of drive module
One output end is connected with the negative output terminals, it is characterised in that：
The light modulating device also includes shunt circuit, and the first end of the shunt circuit is connected with the negative output terminals, institute
The second end for stating shunt circuit is connected with the ground terminal；
The impedance of the shunt circuit is R, wherein 0 ＜ R ＜ P/ (I*I), P are default power threshold, I is default power valve
Electric current in lighting source loop corresponding to value.
2. light modulating device according to claim 1, it is characterised in that the shunt circuit includes at least one resistance.
3. light modulating device according to claim 1, it is characterised in that the light modulating device also includes on-off circuit, described
On-off circuit is connected with the shunt circuit.
4. light modulating device according to claim 3, it is characterised in that the on-off circuit includes controlled end, the first connection
End and second connection end, the controlled end with it is described light modulation drive module the second output end be connected, first connection end with
The second connection end is connected with the shunt circuit.
5. light modulating device according to claim 4, it is characterised in that the on-off circuit is triode, the triode
Base stage be connected with the second output end of the light modulation drive module, the of the colelctor electrode of the triode and the shunt circuit
Two ends are connected, and the emitter stage of the triode is connected with the ground terminal.
6. light modulating device according to claim 5, it is characterised in that the on-off circuit is field-effect transistor, described
The grid of field-effect transistor with it is described light modulation drive module the second output end be connected, the drain electrode of the field-effect transistor and
The second end connection of the shunt circuit, the source electrode of the field-effect transistor are connected with the ground terminal.
7. light modulating device according to claim 5, it is characterised in that the on-off circuit is IGCT, the IGCT
Control pole be connected with the second output end of the light modulation drive module, the of the anode of the IGCT and the shunt circuit
Two ends are connected, and the negative electrode of the IGCT is connected with the ground terminal.
8. the light modulating device according to any one of claim 4 to 6, it is characterised in that the light modulation drive module includes
Power supply circuit, controller and dimming driver；
Input and the rectification filtering module of the first input end of the power supply circuit as the light modulation drive module
First output end is connected, and the second input of the power supply circuit is connected with the ground terminal, the output of the power supply circuit
End connects the input of the controller；
First output end of the controller connects the input of the dimming driver, and the output end of the dimming driver is made
The first output end for the light modulation drive module is connected with the negative output terminals.
9. light modulating device according to claim 8, it is characterised in that the second output end of the controller is as the tune
Second output end of optical drive module is connected with the controlled end of the on-off circuit.
10. a kind of dimming lamp, it is characterised in that including lighting source and light modulation as claimed in any one of claims 1-9 wherein
Device, the positive pole of the lighting source are connected with the positive output terminals of the light modulating device, the negative pole of the lighting source with
The negative output terminals connection of the light modulating device.
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| CN201710897763.4A CN107635330B (en) | 2017-09-28 | 2017-09-28 | Dimming device and dimming lamp |
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| CN201710897763.4A CN107635330B (en) | 2017-09-28 | 2017-09-28 | Dimming device and dimming lamp |
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| CN114501699A (en) * | 2022-02-21 | 2022-05-13 | 青岛易来智能科技股份有限公司 | Dimming circuit, dimmer and LED lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110267390A (en) * | 2019-05-24 | 2019-09-20 | 生迪智慧科技有限公司 | Lamps and lanterns |
| CN114501699A (en) * | 2022-02-21 | 2022-05-13 | 青岛易来智能科技股份有限公司 | Dimming circuit, dimmer and LED lighting device |
| CN114501699B (en) * | 2022-02-21 | 2024-01-19 | 青岛易来智能科技股份有限公司 | Dimming circuit, dimmer and LED lighting equipment |
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| CN107635330B (en) | 2024-08-09 |
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