CN108738191B - Multifunctional LED dimming interface circuit - Google Patents
Multifunctional LED dimming interface circuit Download PDFInfo
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- CN108738191B CN108738191B CN201710254172.5A CN201710254172A CN108738191B CN 108738191 B CN108738191 B CN 108738191B CN 201710254172 A CN201710254172 A CN 201710254172A CN 108738191 B CN108738191 B CN 108738191B
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- 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
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Abstract
The invention provides a multifunctional LED dimming interface circuit, which comprises: the LED lighting device comprises a dimming signal output module, a micro control unit module and a dimmer interface module, wherein the dimming signal output module is connected with the micro control unit module, the micro control unit module is connected with the dimmer interface module, and a plurality of dimmer connecting terminals are LED out from the dimmer interface module.
Description
Technical Field
The invention relates to the technical field of LED driving, in particular to a multifunctional LED dimming interface circuit.
Background
The LED lighting device has multiple flexible dimming modes while saving energy and protecting environment, so that the lighting scheme is more various and intelligent, and the LED lighting device is widely applied as a new generation lighting source.
In the current LED dimming scheme, the dimming is divided according to the variation of the voltage signal, and the three most commonly used dimming modes are: 1-10V dimming, PWM (Pulse Width Modulation) dimming and StepDim step dimming, the voltage (V) of 1-10V dimming is shown in FIG. 11-10V) The variation and the corresponding brightness variation are shown schematically in FIG. 2, which is the voltage (V) of PWM dimmingPWM) The variation and the corresponding brightness variation are shown schematically in FIG. 3, which shows the voltage (V) of StepDim step dimmingstepdim) The schematic diagram of the change and the corresponding brightness change shows that the linear adjustment of the LED brightness is realized through the linear change of the dimming voltage in the dimming of 1-10V; the PWM dimming realizes the linear regulation of the LED brightness through the change of the duty ratio (DutyRatio) of the dimming voltage; StepDim step dimming realizes the step-wise adjustment of the LED brightness through the step-wise change of the voltage.
In the prior art, to implement the three dimming modes, the LED driving circuit needs to design different dimming circuits, and accordingly, after the dimming mode and the dimming circuit of the LED driving circuit are determined, the LED driving circuit can only connect and use the dimmer corresponding to the dimming mode, which brings great limitation to the flexibility of the dimming mode of the LED lighting device.
Disclosure of Invention
The invention aims to provide a multifunctional LED dimming interface circuit which can be simultaneously suitable for at least two dimming modes of 1-10V linear dimming, PWM dimming and StepDim step dimming, and provides a more flexible optional mode for the dimming scheme of an LED lighting device and the selection of a dimmer.
The invention provides a multifunctional LED dimming interface circuit, which comprises: the system comprises a dimming signal output module, a dimensional control unit module and a dimmer interface module, wherein the dimming signal output module is connected with a micro control unit module, and the micro control unit module is connected with the dimmer interface module;
the light modulator interface module is connected with the LED light modulator, receives a light modulation operation signal sent by the light modulator and sends the light modulation operation signal to the micro control unit module;
the micro control unit module determines the dimming mode corresponding to the dimmer to be one of multiple preset dimming modes in the micro control unit module according to the dimming operation signal, and the micro control unit module generates a dimming command signal according to the dimming mode and sends the dimming command signal to the dimming signal output module.
As an alternative, the plurality of dimming modes preset in the mcu module include: at least two of a 1-10V dimming mode, a PWM dimming mode, and a step dimming mode.
As an alternative, when the multiple dimming modes preset in the mcu module are a 1-10V dimming mode and a PWM dimming mode, the dimmer interface module includes a conventional constant current source module, and the conventional constant current source module externally leads out the first dimmer connection terminal and the second dimmer connection terminal.
As an alternative, when the 1-10V dimmer is connected to the first and second dimmer connection terminals, the 1-10V dimmer generates and transmits a linear voltage variation signal, the conventional constant current source module transmits the linear voltage variation signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the 1-10V dimming mode.
As an alternative, when the PWM dimmer is connected to the first dimmer connecting terminal and the second dimmer connecting terminal, the PWM dimmer generates and transmits a high-low level varying signal of a fixed frequency, the conventional constant current source module transmits the high-low level varying signal of the fixed frequency as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
As an alternative, when the multiple dimming modes preset in the micro control unit module include a step dimming mode, the dimmer interface module further includes a step dimming detection module, the step dimming detection module is connected with the micro control unit module and the conventional constant current source module, and a third dimmer connection terminal is led out from the step dimming detection module.
As an alternative, when the step dimmer is connected to the first dimmer connecting terminal, the second dimmer connecting terminal and the third dimmer connecting terminal, the step dimming detecting module generates a step dimmer connecting signal, and the micro control unit module detects the step dimmer connecting signal to determine the dimming mode as the step dimming mode.
As an alternative, the step dimming detection module generates a step dimmer connection signal, and the implementation manner of the micro control unit module detecting the step dimmer connection signal includes:
the step dimming detection module consists of a VDD power supply, a first resistor, a second resistor and a third resistor, wherein the first end of the first resistor is connected with a third dimmer connecting terminal and the first end of the second resistor, the second end of the first resistor is connected with the VDD power supply and the conventional constant current source module, the second end of the second resistor is connected with the first end of a third point resistor and the micro control unit module, and the second end of the third resistor is connected with the conventional constant current source module;
when the step dimmer is connected to the first dimmer connecting terminal, the second dimmer connecting terminal and the third dimmer connecting terminal, the VDD power supply supplies power to the step dimmer, so that the first resistor generates a voltage drop, the micro control unit module detects the voltage drop generated by the first resistor through the connected second resistor and third resistor, and the micro control unit module takes the voltage drop as a step dimmer connecting signal and determines a dimming mode as a step dimming mode.
As an alternative, when the 1-10V dimmer is connected to the first and second dimmer connection terminals, the 1-10V dimmer generates and transmits a linear voltage variation signal, the conventional constant current source module transmits the linear voltage variation signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the 1-10V dimming mode.
As an alternative, when the PWM dimmer is connected to the first and second dimmer connection terminals, the PWM dimmer generates and transmits a high-low level change signal of a fixed frequency, the conventional constant current source module transmits the level change signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
As an alternative, the dimming signal output module is a DAC (Digital analog converter) circuit module or a PWM (Pulse Width Modulation) circuit module.
As an alternative, the multifunctional LED dimming interface circuit further includes a voltage dividing module, and the voltage dividing module is disposed between the conventional constant current source module and the micro control unit module.
As an alternative, the dimming signal output module sends the dimming command signal to the LED power control system, and the LED power control system adjusts the output power of the LED power according to the dimming command signal.
According to the invention, multiple dimming modes are preset in the micro control unit module, and the automatic identification of the type of the dimmer connected with the dimmer interface is realized by combining the dimmer interface design of the dimmer interface module, so that the dimming interface circuit is simultaneously suitable for two or all of 3 types of dimmers including 1-10V dimming, PWM dimming and step dimming, and a more flexible optional mode is provided for the dimming scheme of the LED lighting device and the selection of the dimmers.
Drawings
FIG. 1 shows the voltage (V) for 1-10V dimming1-10V) The change and the corresponding brightness change schematic diagram;
FIG. 2 shows the voltage (V) of PWM dimmingPWM) The change and the corresponding brightness change schematic diagram;
FIG. 3 shows the voltage (V) of StepDim step dimmingstepdim) The change and the corresponding brightness change schematic diagram;
fig. 4 is a schematic diagram of a multifunctional LED dimming interface circuit 1 according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a multifunctional LED dimming interface circuit according to an embodiment of the present invention 2;
fig. 6 is a schematic diagram 3 of a multifunctional LED dimming interface circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a multifunctional LED dimming interface circuit according to an embodiment of the present invention 4;
fig. 8 is an application schematic diagram of a multifunctional LED dimming interface circuit according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
The embodiment of the invention provides a multifunctional LED dimming interface circuit, which comprises: the system comprises a dimming signal output module, a dimensional control unit module and a dimmer interface module, wherein the dimming signal output module is connected with a micro control unit module, and the micro control unit module is connected with the dimmer interface module;
the light modulator interface module is connected with the LED light modulator, receives a light modulation operation signal sent by the light modulator and sends the light modulation operation signal to the micro control unit module;
the micro control unit module determines the dimming mode corresponding to the dimmer to be one of multiple preset dimming modes in the micro control unit module according to the dimming operation signal, and the micro control unit module generates a dimming command signal according to the dimming mode and sends the dimming command signal to the dimming signal output module.
According to the embodiment of the invention, multiple dimming modes are preset in the micro control unit module, and the type of the dimmer connected with the dimmer interface is automatically identified by combining the dimmer interface design of the dimmer interface module, so that the dimming interface circuit is simultaneously suitable for two or all of 3 types of dimmers including 1-10V dimming, PWM dimming and step dimming, and a more flexible optional mode is provided for the dimming scheme of the LED lighting device and the selection of the dimmers.
Optionally, the multiple dimming modes preset in the mcu module include: at least two of a 1-10V dimming mode, a PWM dimming mode, and a step dimming mode.
As can be seen from the background art and the common general knowledge in the industry, 1-10V dimming, PWM dimming and step dimming are the most commonly used dimming modes in the field, and at least two or all of the three dimming modes are preset in the mcu module in the embodiment of the present invention, so as to substantially meet the dimming requirements of the LED lighting device in the field.
Optionally, as shown in fig. 4, when the plurality of dimming modes preset in the mcu module are a 1-10V dimming mode and a PWM dimming mode, the dimmer interface module includes a conventional constant current source module, and the conventional constant current source module leads out a first dimmer connection terminal X2-1 and a second dimmer connection terminal X2-2.
Alternatively, when the 1-10V dimmer is connected to the first dimmer connection terminal X2-1 and the second dimmer connection terminal X2-2, the 1-10V dimmer generates and transmits a linear voltage variation signal, the conventional constant current source module transmits the linear voltage variation signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the 1-10V dimming mode.
As shown in fig. 1, the 1-10V dimming is also generally called 1-10V linear dimming, the dimmer performs linear dimming by outputting a linear voltage variation curve, the adjustable range of the brightness of the LED lighting device is generally 10% to 100%, and the brightness of the LED lighting device is linearly and positively correlated with the dimming voltage value output by the dimmer.
Alternatively, when the PWM dimmer is connected to the first dimmer connection terminal X2-1 and the second dimmer connection terminal X2-2, the PWM dimmer generates and transmits a high-low level variation signal of a fixed frequency, the conventional constant current source module transmits the high-low level variation signal of the fixed frequency as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
As shown in fig. 2, a PWM dimmer is generally used to output high and low level signals with a certain frequency, the duty ratio of the high and low level changes represents different dimming requirements, the adjustable range of the brightness of the LED lighting device is generally 0% to 100%, and the brightness of the LED lighting device is linearly and positively correlated with the duty ratio of the level change signal output by the dimmer.
Optionally, as shown in fig. 5, when the multiple dimming modes preset in the mcu module include a step dimming mode, the dimmer interface module further includes a step dimming detection module, the step dimming detection module is connected to the mcu module and the conventional constant current source module, and a third dimmer connection terminal X3-3 is led out from the step dimming detection module.
Alternatively, when the step dimmer is connected to the first dimmer connection terminal X2-1, the second dimmer connection terminal X2-2, and the third dimmer connection terminal X2-3, the step dimmer detection module generates a step dimmer connection signal, and the micro control unit module detects the step dimmer connection signal and determines the dimming mode as the step dimming mode.
As shown in fig. 3, the step dimmer outputs a voltage variation signal in a step form, and the brightness of the LED lighting device is adjusted in a step form, and is not adjusted linearly.
Optionally, the step dimming detection module generates a step dimmer connection signal, and the implementation manner in which the micro control unit module detects the step dimmer connection signal includes:
as shown in fig. 6, the step dimming detection module comprises a VDD power supply, a first resistor R66, a second resistor R67 and a third resistor R68, wherein a first end of the first resistor R66 is connected to the third dimmer connection terminal X2-3 and a first end of the second resistor R67, a second end of the first resistor R66 is connected to the VDD power supply and the conventional constant current source module, a second end of the second resistor R67 is connected to a first end of the third resistor R68 and the mcu module, and a second end of the third resistor R68 is connected to the conventional constant current source module;
when the step dimmer is connected to the first dimmer connection terminal X2-1, the second dimmer connection terminal X2-2 and the third dimmer connection terminal X2-3, and the VDD power supply supplies power to the step dimmer, so that the first resistor R66 generates a voltage drop, the micro control unit module detects the voltage drop generated by the first resistor R66 through the connected second resistor R67 and the third resistor R68, and the micro control unit module uses the voltage drop as a step dimmer connection signal to determine the dimming mode as the step dimming mode.
Alternatively, when the 1-10V dimmer is connected to the first dimmer connection terminal X2-1 and the second dimmer connection terminal X2-3, the 1-10V dimmer generates and transmits a linear voltage variation signal, the conventional constant current source module transmits the linear voltage variation signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the 1-10V dimming mode.
Alternatively, when the PWM dimmer is connected to the first dimmer connection terminal X2-1 and the second dimmer connection terminal X2-2, the PWM dimmer generates and transmits a high-low level change signal of a fixed frequency, the conventional constant current source module transmits the level change signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
As can be seen from the above alternatives, when the dimmer interface module includes the step dimming detection module, 1-10V dimming and PWM dimming can still be achieved by connecting the 1-10V dimmer and the PWM dimmer only through the first dimmer connection terminal X2-1 and the second dimmer connection terminal X2-2, and the third dimmer connection terminal X2-3 can be generally considered as a dedicated connection terminal of the step dimmer, while the third dimmer connection terminal X2-3 is also generally used for supplying power to the step dimmer.
Optionally, the dimming signal output module is a DAC (Digital analog converter) circuit module or a PWM (Pulse Width Modulation) circuit module.
The dimming signal output module is mainly selected according to a signal mode of the LED power supply control system, when the power supply control system is in a dimming mode according to an analog signal, the DAC circuit module can be generally used as the dimming signal output module to convert the dimming signal sent by the micro control unit module into the analog dimming signal and send the analog dimming signal to the LED power supply control system for dimming according to the analog signal, and the power supply control system adjusts the output power of the LED power supply according to a dimming command, so that the dimming of the LED lighting device is realized; when the LED power control system is in a mode of dimming according to the PWM signal, the PWM circuit module is usually used as a dimming signal output module, the PWM circuit module converts the dimming signal sent by the micro control unit module into the PWM dimming signal, and sends the PWM dimming signal to the LED power control system for dimming according to the PWM model, and the power control system adjusts the output power of the LED power according to the dimming command, thereby dimming the LED lighting device.
Optionally, as shown in fig. 7, the multifunctional LED dimming interface circuit further includes a voltage dividing module, the voltage dividing module is disposed between the conventional constant current source module and the micro control unit module, the voltage dividing module can convert the voltage variation signal of the dimmer interface module into a level of the micro control unit module in a certain proportion, and the micro control unit module can better obtain the voltage variation signal at the dimmer interface module by reading the level.
As an alternative, as shown in fig. 8, the dimming signal output module sends the dimming command signal to the LED power control system, and the LED power control system adjusts the output power of the LED power according to the dimming command signal, so as to adjust the brightness of the LED lighting assembly.
In summary, in the embodiments of the present invention, a plurality of commonly used LED dimming modes are preset in the micro control unit module, and in combination with the design of the dimmer interface module, a plurality of or all dimmers in 1-10V dimming, PWM dimming, and step dimming are compatible, the type of the dimmer connected to the dimmer interface circuit and the corresponding dimming mode thereof are automatically identified through the design of the dimmer connection terminal, after the micro control unit module correspondingly determines the identified dimming mode as one of the preset dimming modes, a dimming command signal is generated according to the dimming mode and is sent to the dimming signal output module, the dimming signal output module sends the command signal to the LED power control system, and the LED power control system completes the adjustment of the luminance of the LED lighting assembly according to the command signal. And a more flexible selection mode is provided for the dimming scheme of the LED lighting device and the selection of the dimmer.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the present invention. It will be understood by those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for portions or all of the technical features thereof without departing from the scope of the present invention.
Claims (12)
1. A multi-functional LED interface circuit that adjusts luminance, its characterized in that includes: the dimming signal output module is connected with the micro control unit module, and the micro control unit module is connected with the dimmer interface module;
the dimmer interface module is connected with an LED dimmer, receives a dimming operation signal sent by the dimmer and sends the dimming operation signal to the micro control unit module;
the micro control unit module determines that the dimming mode corresponding to the dimmer is one of multiple preset dimming modes in the micro control unit module according to the dimming operation signal, and the micro control unit module generates a dimming command signal according to the dimming mode and sends the dimming command signal to the dimming signal output module; the light modulator interface module comprises a conventional constant current source module, the multifunctional LED light modulation interface circuit further comprises a voltage division module, and the voltage division module is arranged between the conventional constant current source module and the micro control unit module.
2. The multi-function LED dimming interface circuit of claim 1, wherein the plurality of dimming modes preset in the mcu module comprise: at least two of a 1-10V dimming mode, a PWM dimming mode, and a step dimming mode.
3. The multi-functional LED dimming interface circuit of claim 2, wherein the regular constant current source module is externally connected to the first and second dimmer connection terminals when the plurality of dimming modes preset in the mcu module are the 1-10V dimming mode and the PWM dimming mode.
4. The multi-function LED dimming interface circuit of claim 3, wherein when a 1-10V dimmer is connected to the first dimmer connection terminal and the second dimmer connection terminal, the 1-10V dimmer generates and transmits a linear voltage variation signal, the regular constant current source module transmits the linear voltage variation signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as a 1-10V dimming mode.
5. The multi-function LED dimming interface circuit of claim 3, wherein when a PWM dimmer is connected to the first and second dimmer connection terminals, the PWM dimmer generates and transmits a high-low level change signal of a fixed frequency, the regular constant current source module transmits the level change signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
6. The multi-functional LED dimming interface circuit of claim 3, wherein when the plurality of dimming modes preset in the mcu module includes a step dimming mode, the dimmer interface module further comprises a step dimming detection module, the step dimming detection module is connected to the mcu module and the regular constant current source module, and the step dimming detection module leads out a third dimmer connection terminal.
7. The multi-function LED dimming interface circuit of claim 6, wherein when a step dimmer is connected to the first dimmer connection terminal, the second dimmer connection terminal and the third dimmer connection terminal, the step dimmer detection module generates a step dimmer connection signal, and the micro control unit module detects the step dimmer connection signal and determines the dimming mode as a step dimming mode.
8. The multi-function LED dimming interface circuit of claim 7, wherein the step dimming detection module generates a step dimmer connection signal, and wherein the micro control unit module detects the step dimmer connection signal by:
the step dimming detection module comprises a VDD power supply, a first resistor, a second resistor and a third resistor, wherein a first end of the first resistor is connected with the third dimmer connecting terminal and a first end of the second resistor, a second end of the first resistor is connected with the VDD power supply and the conventional constant current source module, a second end of the second resistor is connected with a first end of the third resistor and the micro control unit module, and a second end of the third resistor is connected with the conventional constant current source module;
when the ladder dimmer is connected to first dimmer connecting terminal, second dimmer connecting terminal and third dimmer connecting terminal, the VDD power does the ladder dimmer power supply makes first resistance produces the voltage drop, the little the control unit module is through connecting the second resistance with the third resistance detects the voltage drop that first resistance produced, little the control unit module will the voltage drop is regarded as ladder dimmer connection signal will the mode of adjusting luminance is confirmed to step mode of adjusting luminance.
9. The multi-function LED dimming interface circuit of claim 6, wherein when a 1-10V dimmer is connected to the first dimmer connection terminal and the second dimmer connection terminal, the 1-10V dimmer generates and transmits a linear voltage change signal, the regular constant current source module transmits the linear voltage change signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as a 1-10V dimming mode.
10. The multi-function LED dimming interface circuit of claim 6, wherein when a PWM dimmer is connected to the first and second dimmer connection terminals, the PWM dimmer generates and transmits a high-low level change signal of a fixed frequency, the regular constant current source module transmits the level change signal as a dimming operation signal to the micro control unit module, and the micro control unit module determines the dimming mode as the PWM dimming mode.
11. The multi-function LED dimming interface circuit of any of claims 1-10, wherein the dimming signal output module is a DAC circuit module or a PWM circuit module.
12. The multi-function LED dimming interface circuit of any of claims 1-10, wherein the dimming signal output module sends the dimming command signal to an LED power control system, and the LED power control system adjusts the output power of the LED power according to the dimming command signal.
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| 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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| CN201710254172.5A CN108738191B (en) | 2017-04-18 | 2017-04-18 | Multifunctional LED dimming interface circuit |
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| CN108738191B true CN108738191B (en) | 2020-08-21 |
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| US11425805B2 (en) | 2020-02-05 | 2022-08-23 | Energy Focus, Inc. | Control circuit for tubular light emitting diode |
| CN117998698B (en) * | 2024-01-18 | 2024-09-20 | 东莞市倍祺电子科技有限公司 | Double-compatible dimming power supply and control method thereof |
Citations (5)
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|---|---|---|---|---|
| CN102595687A (en) * | 2011-01-07 | 2012-07-18 | 许秀玉 | Intelligent energy-saving-lamp power supply device capable of adjusting light and method thereof |
| CN202713690U (en) * | 2012-04-27 | 2013-01-30 | 企达工业(南京)有限公司 | Dimming interface circuit used for LED drive power |
| CN104115557A (en) * | 2012-01-20 | 2014-10-22 | 奥斯兰姆施尔凡尼亚公司 | Lighting driver having multiple dimming interfaces |
| CN104981075A (en) * | 2015-07-13 | 2015-10-14 | 上海阿卡得电子有限公司 | Multifunctional LED light modulation interface circuit |
| CN105792408A (en) * | 2015-01-09 | 2016-07-20 | 松下知识产权经营株式会社 | Illumination system and luminaire |
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| US8212485B2 (en) * | 2009-12-10 | 2012-07-03 | General Electric Company | Dimming bridge module |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595687A (en) * | 2011-01-07 | 2012-07-18 | 许秀玉 | Intelligent energy-saving-lamp power supply device capable of adjusting light and method thereof |
| CN104115557A (en) * | 2012-01-20 | 2014-10-22 | 奥斯兰姆施尔凡尼亚公司 | Lighting driver having multiple dimming interfaces |
| CN202713690U (en) * | 2012-04-27 | 2013-01-30 | 企达工业(南京)有限公司 | Dimming interface circuit used for LED drive power |
| CN105792408A (en) * | 2015-01-09 | 2016-07-20 | 松下知识产权经营株式会社 | Illumination system and luminaire |
| CN104981075A (en) * | 2015-07-13 | 2015-10-14 | 上海阿卡得电子有限公司 | Multifunctional LED light modulation interface circuit |
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| WO2018192470A1 (en) | 2018-10-25 |
| CN108738191A (en) | 2018-11-02 |
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