CN108738191A - Multifunctional LED dimming interface circuit - Google Patents
Multifunctional LED dimming interface circuit Download PDFInfo
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- CN108738191A CN108738191A CN201710254172.5A CN201710254172A CN108738191A CN 108738191 A CN108738191 A CN 108738191A CN 201710254172 A CN201710254172 A CN 201710254172A CN 108738191 A CN108738191 A CN 108738191A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
A kind of Multifunctional LED dimming interface circuit provided by the invention, including：Dim signal output module, micro-control unit module, dimmer interface module, dim signal output module connects micro-control unit module, micro-control unit module connects dimmer interface module, dimmer interface module draws multiple light modulator connection terminals outward, the light modulator type that the present invention is connected by automatic identification dimmer interface, realize a kind of applicable 1-10V light modulations of dimming interface circuit, at least two in PWM light modulations and ladder light modulation three types light modulation type, more flexible optional mode is provided for the selection of the dimming arrangement and light modulator of LED light device.
Description
Technical field
The present invention relates to field of LED drive technologies, and in particular to a kind of Multifunctional LED dimming interface circuit.
Background technology
LED light device has a variety of flexible dimming modes, keeps illumination scheme more various while energy conservation and environmental protection
With intelligence, it is widely used as lighting source of new generation.
It in current LED dimming arrangements, is divided according to the version of voltage signal, the most commonly used three kinds of tune
Light mode is respectively：1-10V is dimmed, PWM (Pulse Width Modulation, pulse width modulation) light modulations and
StepDim ladders dim, and are as shown in Figure 1 the voltage (V of 1-10V light modulations1-10V) variation and corresponding brightness change schematic diagram, such as
Fig. 2 show the voltage (V of PWM light modulationsPWM) variation and corresponding brightness change schematic diagram, be illustrated in figure 3 StepDim ladders
Voltage (the V of light modulationstepdim) variation and corresponding brightness change schematic diagram, from above-mentioned schematic diagram it is found that 1-10V light modulation pass through
The linear change of dimmer voltage realizes the linear regulation of LED luminance；PWM dims the duty ratio (Duty by dimmer voltage
Ratio) change, realize the linear regulation of LED luminance；StepDim ladders dim the step variation by voltage, realize LED
The staged of brightness is adjusted.
In the prior art, LED drive circuit will realize above-mentioned three kinds of dimming modes, need to separately design no light modulation
Circuit, correspondingly, after dimming mode and the light adjusting circuit determination of LED drive circuit, which can only also connect use
The light modulator of corresponding this kind of dimming mode, this brings the flexibility of LED light device dimming mode larger limitation.
Invention content
The purpose of the present invention is to provide a kind of Multifunctional LED dimming interface circuit, can linearly be adjusted suitable for 1-10V simultaneously
Light, PWM light modulations and StepDim ladders dim at least two in three kinds of dimming modes, are the dimming arrangement of LED light device
And the selection of light modulator provides more flexible optional mode.
A kind of Multifunctional LED dimming interface circuit provided by the invention, including：Dim signal output module, dimension control are single
Element module, dimmer interface module, dim signal output module are connect with micro-control unit module, micro-control unit module and tune
Light device interface module connects；
Dimmer interface module connects LED dimmer, and dimmer interface module receives the Dimming operation letter that light modulator is sent out
Number, it is sent to micro-control unit module；
Micro-control unit module determines that the corresponding light-modulating mode of light modulator is micro-control unit mould according to Dimming operation signal
One kind in block in preset a variety of light-modulating modes, micro-control unit module generate dim command signal according to the light-modulating mode,
It is sent to dim signal output module.
Alternatively, preset a variety of light-modulating modes include in micro-control unit module：1-10V dims mould
At least two in formula, PWM light-modulating modes and ladder light-modulating mode.
Alternatively, in micro-control unit module preset a variety of light-modulating modes be 1-10V light-modulating modes with
And when PWM light-modulating modes, dimmer interface module includes conventional constant current source module, and conventional constant current source module is drawn first and adjusted outward
Light device connection terminal and the second light modulator connection terminal.
Alternatively, when 1-10V light modulators are connected to the first light modulator connection terminal and the second light modulator
Connection terminal, 1-10V light modulators generate concurrent line sending voltage change signal, and conventional constant current source module, which changes linear voltage, to be believed
Number be used as Dimming operation signal, be sent to micro-control unit module, light-modulating mode is determined as 1-10V tune by micro-control unit module
Optical mode.
Alternatively, when PWM light modulators are connected to the first light modulator connection terminal and the second light modulator connects
Connecting terminal, PWM light modulators generate and send the low and high level variable signal of fixed frequency, and conventional constant current source module is by fixed frequency
Low and high level variable signal as Dimming operation signal, be sent to micro-control unit module, micro-control unit module will dim
Pattern is determined as PWM light-modulating modes.
Alternatively, preset a variety of light-modulating modes include ladder light-modulating mode in micro-control unit module
When, dimmer interface module further includes ladder light modulation detection module, ladder dim detection module and micro-control unit module and
Conventional constant current source module connection, ladder light modulation detection module draw third light modulator connection terminal outward.
Alternatively, when ladder light modulator is connected to the first light modulator connection terminal, the connection of the second light modulator
Terminal and third light modulator connection terminal, ladder dim detection module and generate ladder light modulator connection signal, micro-control unit
Module detects ladder light modulator connection signal, and light-modulating mode is determined as ladder light-modulating mode.
Alternatively, ladder light modulation detection module generates ladder light modulator connection signal, micro-control unit mould
Block detects that the realization method of ladder light modulator connection signal includes：
Ladder dims detection module by VDD power supplys, first resistor, second resistance and 3rd resistor composition, wherein first
The first end of resistance is connect with the first end of third light modulator connection terminal and second resistance, the second end of first resistor with
VDD power supplys and conventional constant current source module connection, the first end and microcontroller of the second end of second resistance and thirdly resistance
Unit module connects, and the second end of 3rd resistor is connect with conventional constant current source module；
When ladder light modulator is connected to the first light modulator connection terminal, the second light modulator connection terminal and third light modulator
Connection terminal, VDD power supplys are ladder dimmer powered, and first resistor is made to generate voltage drop, and micro-control unit module passes through connection
Second resistance and 3rd resistor, detect first resistor generate voltage drop, micro-control unit module using voltage drop as
Light-modulating mode is determined as ladder light-modulating mode by ladder light modulator connection signal.
Alternatively, when 1-10V light modulators are connected to the first light modulator connection terminal and the second light modulator
Connection terminal, 1-10V light modulators generate concurrent line sending voltage change signal, and conventional constant current source module, which changes linear voltage, to be believed
Number be used as Dimming operation signal, be sent to micro-control unit module, light-modulating mode is determined as 1-10V tune by micro-control unit module
Optical mode.
Alternatively, when PWM light modulators are connected to the first light modulator connection terminal and the second light modulator connects
Connecting terminal, PWM light modulators generate and send the low and high level variable signal of fixed frequency, and conventional constant current source module is by level change
Signal is sent to micro-control unit module as Dimming operation signal, and light-modulating mode is determined as PWM tune by micro-control unit module
Optical mode.
Alternatively, dim signal output module is DAC (Digital analog converter, number
Analog converter) circuit module or PWM (Pulse Width Modulation, pulse width modulation) circuit module.
Alternatively, Multifunctional LED dimming interface circuit further includes division module, and division module is arranged normal
It advises between constant current source module and micro-control unit module.
Alternatively, dim command signal is sent to LED power control system by dim signal output module,
LED power control system adjusts the output power of LED power according to dim command signal.
The present invention in micro-control unit module by pre-seting a variety of light-modulating modes, in conjunction with the tune of dimmer interface module
Light device Interface design realizes that the light modulator type connected to dimmer interface carries out automatic identification, to make a kind of light modulation connect
Mouthful circuit is dimmed suitable for 1-10V simultaneously, and PWM light modulations and ladder dim two kinds in 3 type light modulators or all, are
The selection of the dimming arrangement and light modulator of LED light device provides more flexible optional mode.
Description of the drawings
Fig. 1 is the voltage (V of 1-10V light modulations1-10V) variation and corresponding brightness change schematic diagram；
Fig. 2 is the voltage (V of PWM light modulationsPWM) variation and corresponding brightness change schematic diagram；
Fig. 3 is the voltage (V of StepDim ladders light modulationstepdim) variation and corresponding brightness change schematic diagram；
Fig. 4 is a kind of Multifunctional LED dimming interface circuit schematic diagram 1 provided in an embodiment of the present invention；
Fig. 5 is a kind of Multifunctional LED dimming interface circuit schematic diagram 2 provided in an embodiment of the present invention；
Fig. 6 is a kind of Multifunctional LED dimming interface circuit schematic diagram 3 provided in an embodiment of the present invention；
Fig. 7 is a kind of Multifunctional LED dimming interface circuit schematic diagram 4 provided in an embodiment of the present invention；
A kind of positions Fig. 8 Multifunctional LED dimming interface circuit application schematic diagram provided in an embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings and in conjunction with specific embodiments, the present invention is described in further detail.
A kind of Multifunctional LED dimming interface circuit provided in an embodiment of the present invention, including：Dim signal output module, dimension
Control unit module, dimmer interface module, dim signal output module are connect with micro-control unit module, micro-control unit mould
Block is connect with dimmer interface module；
Dimmer interface module connects LED dimmer, and dimmer interface module receives the Dimming operation letter that light modulator is sent out
Number, it is sent to micro-control unit module；
Micro-control unit module determines that the corresponding light-modulating mode of light modulator is micro-control unit mould according to Dimming operation signal
One kind in block in preset a variety of light-modulating modes, micro-control unit module generate dim command signal according to the light-modulating mode,
It is sent to dim signal output module.
The embodiment of the present invention in micro-control unit module by pre-seting a variety of light-modulating modes, in conjunction with dimmer interface mould
The dimmer interface of block designs, and realizes that the light modulator type connected to dimmer interface carries out automatic identification, to make one kind
Dimming interface circuit is dimmed suitable for 1-10V simultaneously, two kinds or complete in PWM light modulations and ladder 3 type light modulators of light modulation
Portion provides more flexible optional mode for the selection of the dimming arrangement and light modulator of LED light device.
Optionally, preset a variety of light-modulating modes include in micro-control unit module：1-10V light-modulating modes, PWM dim mould
At least two in formula and ladder light-modulating mode.
According to aforementioned background art and industry common knowledge it is found that 1-10V light modulations, PWM light modulations and ladder light modulation are these
The most commonly used several light-modulating modes in field preset above-mentioned three kinds of light modulations mould in the micro-control unit module in the embodiment of the present invention
At least two or whole of formula, can substantially meet light modulation demand of this field for LED light device.
Optionally, as shown in figure 4, in micro-control unit module preset a variety of light-modulating modes be 1-10V light-modulating modes with
And when PWM light-modulating modes, dimmer interface module includes conventional constant current source module, and conventional constant current source module is drawn first and adjusted outward
Light device connection terminal X2-1 and the second light modulator connection terminal X2-2.
Optionally, when 1-10V light modulators are connected to the first light modulator connection terminal X2-1 and the second light modulator connecting pin
Sub- X2-2,1-10V light modulator generate concurrent line sending voltage change signal, and conventional constant current source module is by linear voltage variable signal
As Dimming operation signal, it is sent to micro-control unit module, light-modulating mode is determined as 1-10V and dimmed by micro-control unit module
Pattern.
As shown in Figure 1,1-10V light modulations are also commonly known as 1-10V linearity light adjustings, light modulator is become by exporting linear voltage
Change curve carry out linearity light adjusting, the brightness adjustable extent of LED light device is usually 10% to 100%, LED light device it is bright
The linear positive correlation of dimmer voltage value of degree and light modulator output.
Optionally, when PWM light modulators are connected to the first light modulator connection terminal X2-1 and the second light modulator connection terminal
X2-2, PWM light modulator generate and send the low and high level variable signal of fixed frequency, and conventional constant current source module is by fixed frequency
Low and high level variable signal is sent to micro-control unit module as Dimming operation signal, and micro-control unit module will dim mould
Formula is determined as PWM light-modulating modes.
As shown in Fig. 2, PWM light modulators are typically used as the low and high level signal of output certain frequency, pass through height voltage level
The duty ratio of variation represents different light modulation demands, and the brightness adjustable extent of LED light device is usually 0% to 100%, LED
The linear positive correlation of duty ratio of the brightness of lighting device and the level change signal of light modulator output.
Optionally, as shown in figure 5, preset a variety of light-modulating modes include ladder light-modulating mode in micro-control unit module
When, dimmer interface module further includes ladder light modulation detection module, ladder dim detection module and micro-control unit module and
Conventional constant current source module connection, ladder light modulation detection module draw third light modulator connection terminal X3-3 outward.
Optionally, when ladder light modulator is connected to the first light modulator connection terminal X2-1, the second light modulator connection terminal X2-
2 and third light modulator connection terminal X2-3, ladder dim detection module and generate ladder light modulator connection signal, micro-control unit
Module detects ladder light modulator connection signal, and light-modulating mode is determined as ladder light-modulating mode.
As shown in figure 3, the voltage change signal of ladder light modulator output ladder form, the brightness of LED light device correspond to
It is the adjustment of ladder form, is no longer Serial regulation.
Optionally, ladder light modulation detection module generates ladder light modulator connection signal, and micro-control unit module detects rank
The realization method of terraced light modulator connection signal includes：
As shown in fig. 6, ladder dims detection module by VDD power supplys, first resistor R66, second resistance R67 and third electricity
Hinder R68 compositions, wherein the of the first end of first resistor R66 and third light modulator connection terminal X2-3 and second resistance R67
One end connects, and the second end of first resistor R66 is connect with VDD power supplys and conventional constant current source module, and the second of second resistance R67
End is connect with the first end of 3rd resistor R68 and micro-control unit module, the second end of 3rd resistor R68 and conventional constant-current source
Module connects；
When ladder light modulator is connected to the first light modulator connection terminal X2-1, the second light modulator connection terminal X2-2 and
Three light modulator connection terminal X2-3, VDD power supplys are ladder dimmer powered, and first resistor R66 is made to generate voltage drop, microcontroller list
Element module detects the voltage drop that first resistor R66 is generated, micro-control by the second resistance R67 and 3rd resistor R68 of connection
Unit module processed is determined as ladder light-modulating mode using voltage drop as ladder light modulator connection signal, by light-modulating mode.
Optionally, when 1-10V light modulators are connected to the first light modulator connection terminal X2-1 and the second light modulator connecting pin
Sub- X2-3,1-10V light modulator generate concurrent line sending voltage change signal, and conventional constant current source module is by linear voltage variable signal
As Dimming operation signal, it is sent to micro-control unit module, light-modulating mode is determined as 1-10V and dimmed by micro-control unit module
Pattern.
Optionally, when PWM light modulators are connected to the first light modulator connection terminal X2-1 and the second light modulator connection terminal
X2-2, PWM light modulator generate and send the low and high level variable signal of fixed frequency, and conventional constant current source module believes level change
Number it is used as Dimming operation signal, is sent to micro-control unit module, light-modulating mode is determined as PWM and dimmed by micro-control unit module
Pattern.
It, still can be with from above-mentioned optional mode it is found that when dimmer interface module includes that ladder dims detection module
Only pass through the first light modulator connection terminal X2-1 and the second light modulator connection terminal X2-2 connection 1-10V light modulators and PWM
Light modulator, to realize 1-10V light modulations and PWM light modulations, third light modulator connection terminal X2-3 is generally it can be thought that be ladder tune
The Special connection terminal of light device, meanwhile, third light modulator connection terminal X2-3 is also commonly used for as ladder dimmer powered.
Optionally, dim signal output module is DAC (Digital analog converter, digital analog converter)
Circuit module or PWM (Pulse Width Modulation, pulse width modulation) circuit module.
Dim signal output module is mainly selected according to the signal mode of LED power control system, when power supply controls
System is when realizing the pattern of light modulation according to analog signal, usually usable DAC circuit module as dim signal output module,
Dim signal that micro-control unit module is sent out is converted into simulation dim signal, is sent to and is dimmed according to analog signal
LED power control system, power control system adjusts the output power of LED power according to dimmer command, to realize LED illumination
The light modulation of device；When LED power control system be according to pwm signal realize light modulation pattern when, then usually using pwm circuit
The dim signal that micro-control unit module is sent out is converted into PWM tune by module as dim signal output module, pwm circuit module
Optical signal is sent to the LED power control system dimmed according to PWM models, and power control system is according to dimmer command tune
The output power of whole LED power, to realize the light modulation of LED light device.
Optionally, as shown in fig. 7, Multifunctional LED dimming interface circuit further includes division module, division module is arranged normal
It advises between constant current source module and micro-control unit module, which can be by the voltage change signal of dimmer interface module
It is converted into the level of micro-control unit module in certain proportion, micro-control unit module, can be more preferable by reading the level
Obtain dimmer interface module at voltage change signal.
Alternatively, as shown in figure 8, dim command signal is sent to LED electricity by dim signal output module
Source control system, LED power control system adjusts the output power of LED power according to dim command signal, to realize LED
The adjusting of luminescence component brightness.
In conclusion the embodiment of the present invention dims mould by pre-seting a variety of common LED in micro-control unit module
Formula dims 1-10V in conjunction with the design of dimmer interface module, a variety of in PWM light modulations and ladder light modulation or whole light modulators
It is compatible with, by the design of light modulator connection terminal, the light modulator type and its correspondence that dimmer interface circuit is connected
Light-modulating mode carry out automatic identification, micro-control unit module by the light-modulating mode recognized correspondence is determined as preset light modulation mould
After one kind in formula, dim command signal is generated according to this kind of light-modulating mode and is sent to dim signal output module, light modulation letter
Number output module sends command signals to LED power control system, and LED power control system completes power according to command signal
Adjusting, realize LED luminescence component brightness adjusting.Selection for the dimming arrangement and light modulator of LED light device provides
More flexible optional mode.
Finally it should be noted that above example is only used to illustrate the technical scheme of the present invention, rather than to the present invention's
Limitation.Those skilled in the art are it is to be understood that still can be without creative efforts to aforementioned reality
It applies the technical solution recorded in example to modify, or to which part even all technical features progress equivalent replacement, and this
A little modification or replacements, the range for technical solution of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (13)
1. a kind of Multifunctional LED dimming interface circuit, which is characterized in that including：Dim signal output module ties up control unit mould
Block, dimmer interface module, the dim signal output module are connect with the micro-control unit module, the micro-control unit
Module is connect with the dimmer interface module；
The dimmer interface module connects LED dimmer, and the dimmer interface module receives the tune that the light modulator is sent out
Light operation signal is sent to the micro-control unit module；
The micro-control unit module determines that the corresponding light-modulating mode of the light modulator is described according to the Dimming operation signal
One kind in micro-control unit module in preset a variety of light-modulating modes, the micro-control unit module is according to the light modulation mould
Formula generates dim command signal, is sent to the dim signal output module.
2. Multifunctional LED dimming interface circuit according to claim 1, which is characterized in that the micro-control unit module
Interior preset a variety of light-modulating modes include：At least two in 1-10V light-modulating modes, PWM light-modulating modes and ladder light-modulating mode
Kind.
3. Multifunctional LED dimming interface circuit according to claim 2, which is characterized in that the micro-control unit module
When interior preset a variety of light-modulating modes are 1-10V light-modulating modes and PWM light-modulating modes, the dimmer interface module includes normal
Constant current source module is advised, the routine constant current source module draws the first light modulator connection terminal and the second light modulator connecting pin outward
Son.
4. Multifunctional LED dimming interface circuit according to claim 3, which is characterized in that when 1-10V light modulators are connected to
The first light modulator connection terminal and the second light modulator connection terminal, the 1-10V light modulators generate concurrent line sending
Property voltage change signal, it is described routine constant current source module using the linear voltage variable signal be used as Dimming operation signal, transmission
To the micro-control unit module, the light-modulating mode is determined as 1-10V light-modulating modes by the micro-control unit module.
5. Multifunctional LED dimming interface circuit according to claim 3, which is characterized in that when PWM light modulators are connected to institute
The first light modulator connection terminal and the second light modulator connection terminal are stated, the PWM light modulators generate and send fixed frequency
The low and high level variable signal of rate, the routine constant current source module is using the level change signal as Dimming operation signal, hair
It send to the micro-control unit module, the light-modulating mode is determined as PWM light-modulating modes by the micro-control unit module.
6. Multifunctional LED dimming interface circuit according to claim 2, which is characterized in that the micro-control unit module
When interior preset a variety of light-modulating modes include ladder light-modulating mode, the dimmer interface module further includes ladder light modulation detection mould
Block, the ladder light modulation detection module are connect with the micro-control unit module and the conventional constant current source module, the rank
Trapeziodal modulation light detection module draws third light modulator connection terminal outward.
7. Multifunctional LED dimmer interface circuit according to claim 6, which is characterized in that when ladder light modulator connects
To the first light modulator connection terminal, the second light modulator connection terminal and the third light modulator connection terminal, institute
It states ladder light modulation detection module and generates ladder light modulator connection signal, the micro-control unit module detects the ladder light modulation
The light-modulating mode is determined as ladder light-modulating mode by device connection signal.
8. Multifunctional LED dimmer interface circuit according to claim 7, which is characterized in that the ladder light modulation detection
Module generates ladder light modulator connection signal, and the micro-control unit module detects the reality of the ladder light modulator connection signal
Now mode includes：
The ladder light modulation detection module is by VDD power supplys, first resistor, second resistance and 3rd resistor composition, wherein described
The first end of first resistor is connect with the first end of the third light modulator connection terminal and the second resistance, and described first
The second end of resistance is connect with the VDD power supplys and the conventional constant current source module, the second end of the second resistance and institute
State the thirdly first end of resistance and micro-control unit module connection, the second end of the 3rd resistor and the routine
Constant current source module connects；
When ladder light modulator is connected to the first light modulator connection terminal, the second light modulator connection terminal and described
Three light modulator connection terminals, the VDD power supplys are the ladder dimmer powered, and the first resistor is made to generate voltage drop, institute
The second resistance and the 3rd resistor of the micro-control unit module by connection are stated, detects that the first resistor generates
Voltage drop, the micro-control unit module is using the voltage drop as the ladder light modulator connection signal, by the light modulation
Pattern is determined as ladder light-modulating mode.
9. Multifunctional LED dimmer interface circuit according to claim 6, which is characterized in that when 1-10V light modulators connect
To the first light modulator connection terminal and the second light modulator connection terminal, the 1-10V light modulators are generated and are sent
Linear voltage variable signal, the routine constant current source module is using the linear voltage variable signal as Dimming operation signal, hair
It send to the micro-control unit module, the light-modulating mode is determined as 1-10V light-modulating modes by the micro-control unit module.
10. Multifunctional LED dimmer interface circuit according to claim 6, which is characterized in that when PWM light modulators connect
To the first light modulator connection terminal and the second light modulator connection terminal, the PWM light modulators are generated and are sent solid
Determine the low and high level variable signal of frequency, the routine constant current source module is believed the level change signal as Dimming operation
Number, it is sent to the micro-control unit module, the light-modulating mode is determined as PWM and dims mould by the micro-control unit module
Formula.
11. the Multifunctional LED dimmer interface circuit according to any one of claim 1-10, which is characterized in that described
Dim signal output module is DAC circuit module or pwm circuit module.
12. the Multifunctional LED dimmer interface circuit according to any one of claim 1-10, which is characterized in that described
Multifunctional LED dimming interface circuit further includes division module, and the division module setting is in the conventional constant current source module and institute
It states between micro-control unit module.
13. the Multifunctional LED dimmer interface circuit according to any one of claim 1-10, which is characterized in that described
The dim command signal is sent to LED power control system, the LED power control system root by dim signal output module
The output power of LED power is adjusted according to the dim command signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254172.5A CN108738191B (en) | 2017-04-18 | 2017-04-18 | Multifunctional LED dimming interface circuit |
| PCT/CN2018/083308 WO2018192470A1 (en) | 2017-04-18 | 2018-04-17 | Multi-functional led dimming interface circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254172.5A CN108738191B (en) | 2017-04-18 | 2017-04-18 | Multifunctional LED dimming interface circuit |
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| CN108738191A true CN108738191A (en) | 2018-11-02 |
| CN108738191B CN108738191B (en) | 2020-08-21 |
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| Publication number | Publication date |
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| CN108738191B (en) | 2020-08-21 |
| WO2018192470A1 (en) | 2018-10-25 |
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