CN110493917A - A kind of multiple-channel output control circuit and method for LED light supplementing lamp for plants - Google Patents
A kind of multiple-channel output control circuit and method for LED light supplementing lamp for plants Download PDFInfo
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- CN110493917A CN110493917A CN201910786962.7A CN201910786962A CN110493917A CN 110493917 A CN110493917 A CN 110493917A CN 201910786962 A CN201910786962 A CN 201910786962A CN 110493917 A CN110493917 A CN 110493917A
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005286 illumination Methods 0.000 claims abstract description 14
- 238000001228 spectrum Methods 0.000 claims description 52
- 238000002211 ultraviolet spectrum Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000012010 growth Effects 0.000 abstract description 7
- 230000008635 plant growth Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 34
- 241001025261 Neoraja caerulea Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 229930002875 chlorophyll Natural products 0.000 description 1
- 235000019804 chlorophyll Nutrition 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
- A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Cultivation Of Plants (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention relates to circuit control technologies, it is desirable to provide a kind of multiple-channel output control circuit and method for LED light supplementing lamp for plants.The circuit includes LED driver, LED multi-path mould group and control and drive module for LED driver output to be divided into multichannel to power to each LED module；Control and drive module include a control circuit and multiple driving circuits-switching tube combination, and each driving circuit-switching tube combination includes a driving circuit and a switching tube；Each LED module matches a driving circuit-switching tube combination.The present invention can export LED driver from multichannel is extended to all the way, connect multiple LED modules；User can choose timesharing using multiple mould groups, or is controlled by PWM while using multiple mould groups.LED driver cooperates multiple LED modules, can export the light wave of suitable wavelength in the different stages of growth of plant, accelerate the growth and development of plant.Under the premise of keeping the effect of plant illumination, cost, the utilization rate for improving LED driver can reduce.
Description
Technical field
The present invention relates to circuit control technology, in particular to a kind of multiple-channel output for LED light supplementing lamp for plants controls electricity
Road and method.
Background technique
Light is converted to organic energy through photosynthesis in plant, to growth and breeding.Therefore, the life of Illumination on Plant
Long and result plays an important role.Plant generally relies on the Chlorophyll absorption irradiation light in blade, is in 400nm to wavelength
The blue light and 600nm~700nm feux rouges of~500nm is very sensitive.The light of different wave length has different effects to different plants
Fruit, or even the wavelength of the light in the different stages of growth demand of plant is different.In general, blue light is suitable for initial stage
The growth of plant leaf, feux rouges have relatively good effect to promotion flowering of plant result.Therefore it is hoped that there will be a kind of lamps by many users
Tool can adjust the wavelength of output light for plant growth each stage, reach optimal light filling effect.
The LED light supplementing lamp for plants of existing market, substantially has following several, respectively there is advantage and disadvantage: (1) using single feux rouges
Or blue-ray LED mould group, whole feux rouges or blue laser output, it is at low cost, but output wavelength is single；(2) added using blue-ray LED mould group red
Light LED module exports red blue light, but the power ratio of red blue light is non-adjustable, at low cost, can export double-colored wavelength, but not
It is adjustable；(3) red-light LED mould group is added using blue-ray LED mould group, exports red blue light, the power proportions of red blue light are adjustable, can be defeated
Double-colored wavelength out, but generally require 2 LED drivers or a driver and exported with 2 tunnels, it is at high cost；(4) using complete
The optical power output proportion of spectrum LED module, full spectrum light output, each wave band is non-adjustable, and at low cost, output wavelength is more, but
It is many wavelength is invalid, and output wavelength ratio is unadjustable；(5) a certain amount of red and blue LED is added using full spectrum mould group
The power output ratio of mould group, each mould group is non-adjustable, and cost is medium, and output wavelength is more, has emphasis wavelength, but ratio can not
It adjusts；(6) a certain amount of red and blue LED mould group is added using full spectrum mould group, the power output ratio of each mould group is adjustable.It can export more
Wavelength is planted, but generally require 2 or more LED drivers or a driver there is multiple-channel output, it is at high cost, to driver
It is more demanding.
Summary of the invention
The technical problem to be solved by the present invention is to overcome multiple-channel output, defect with high costs in the prior art, provide one
Kind is used for the multiple-channel output control circuit and method of LED light supplementing lamp for plants, is extended to 2 tunnels or multichannel to realize to export all the way
Output.
In order to solve the technical problem, the solution that the present invention uses is:
A kind of multiple-channel output control circuit for LED light supplementing lamp for plants, including LED driver and LED multi-path mould are provided
Group；It further include one for LED driver to be exported the control and drive module that are divided into multichannel to power to each LED module；Institute
It states control and drive module includes a control circuit and multiple driving circuits-switching tube combination, each driving circuit-switching tube
Combination includes a driving circuit and a switching tube；Each LED module matches a driving circuit-switching tube combination.
In the present invention, the LED multi-path mould group refers at least 2 paths of LEDs mould groups.
In the present invention, then the matched switching tube series connection of each LED module is attempted by two outputs of LED driver
Between end；In each driving circuit-switching tube combination, driving circuit one end connects the signal input part of its switching tube, driving electricity
The other end on road is connected to the control circuit.
In the present invention, each LED module series connection is followed by two output ends of LED driver；In each driving circuit-switching tube
In combination, switching tube is attempted by the both ends of corresponding LED module, and one end of driving circuit connects the signal input part of its switching tube,
The other end of driving circuit is connected to the control circuit.
In the present invention, the switching tube is switch mosfet pipe, IGBT switching tube or triode.
In the present invention, the building form of the LED multi-path mould group be it is following any one:
It (1) include blue color spectrum LED module and red spectrum LED module；
It (2) include blue color spectrum LED module, red spectrum LED module and ultraviolet spectra LED module；
It (3) include blue color spectrum LED module, red spectrum LED module and full-spectrum LED mould group；
It (4) include blue color spectrum LED module and full-spectrum LED mould group；
It (5) include red spectrum LED module and full-spectrum LED mould group；
It (6) include ultraviolet spectra LED module and full-spectrum LED mould group.
In the present invention, the emission wavelength of the blue color spectrum LED module is 400nm~500nm；Red spectrum LED module
Emission wavelength be 600nm~700nm；The emission wavelength of ultraviolet spectra LED module is 260nm~400nm；Full-spectrum LED mould
The emission wavelength of group is the combination of multiple color spectrums, and wave-length coverage is 260nm~780nm.
Invention further provides the multiple-channel outputs that LED light supplementing lamp for plants is realized based on aforementioned multiple-channel output control circuit
The method of control is that the output all the way of LED driver is divided into multiple-channel output by pulsewidth modulation (PWM): each road output occupies
The sum of percentage be 100%, be adjusted, realized to every road output power to per the accounting exported all the way by pulsewidth modulation
Control.(since the frequency of pulsewidth modulation is higher than the resolution ratio of human eye, the effect exported when being controlled using PWM is looked like together
When drive multiple LED modules.)
Invention further provides the multiple-channel outputs that LED light supplementing lamp for plants is realized based on aforementioned multiple-channel output control circuit
The method of control is to drive the output all the way of LED driver being divided into multiple-channel output by timesharing: every road output occupies certain
Time (for example the first via exports 10 minutes, and then the second tunnel exports 20 minutes, then the output of third road 5 minutes etc.), every time only
Have and export all the way, the length of time and watt level of every road output are set by control circuit.
In the present invention, by control circuit by following multiple-channel output controls for realizing LED light supplementing lamp for plants in the way of any one
System:
(1) it manually controls:
By stirring switch or knob in control circuit, the duty ratio or turn-on time of each LED module are adjusted；
(2) it is realized and is automatically controlled using MCU or PLC chip
The embedded software functional module in MCU or PLC chip, needs according to plant growing cycle to light irradiation time, light
It is configured according to period, feux rouges or blue laser output；Illumination is realized by the automatic control to switch or knob in control circuit
Condition switching；
(3) automatic control under radio condition
The embedded software functional module in MCU or PLC chip, and combining wireless communication module utilize hand-held intelligent end
End or remote control computer need to carry out light irradiation time, periodicity of illumination, feux rouges or blue laser output according to plant growing cycle
Setting；Illumination condition switching is realized by the automatic control to switch or knob in control circuit.
Compared with prior art, the solution have the advantages that:
1, general LED driver only exports all the way, can only connect fixed LED module, and the present invention can drive LED
Device is exported from multichannel is extended to all the way, can connect multiple LED modules；User can choose timesharing and use multiple mould groups, Huo Zhetong
It crosses PWM control while using multiple mould groups.
2, the light of different wave length has different growth stimulations to different plants, in the different stages of growth of plant
The wavelength of the light of demand is different.In general, blue light is suitable for the growth of the plant leaf at initial stage, and feux rouges plants promotion
Object, which is yielded positive results, relatively good effect.LED driver with multiple output function cooperates multiple LED modules, can plant
The different stages of growth of object export the light wave of suitable wavelength, accelerate the growth and development of plant.
3, it compared to the plant illumination mode for cooperating multiple LED modules using multiple LED drivers, is only driven with a LED
Device adds extension output to cooperate the modes of multiple LED modules, under the premise of keeping the effect of plant illumination, can reduce cost,
Improve the utilization rate of LED driver.
Detailed description of the invention
Fig. 1 is the multiple-channel output control principle schematic diagram that LED multi-path mould group is directed in the present invention.
Fig. 2 is LED module circuit diagram in parallel；
Fig. 3 is concatenated LED module schematic diagram.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail.
As shown in Figure 1, in the present invention be used for LED light supplementing lamp for plants multiple-channel output control circuit, including LED driver and
LED multi-path mould group (at least 2 tunnels)；It further include one for LED driver output to be divided into multichannel to power to each LED module
Control and drive module.Wherein, the building form of LED multi-path mould group be it is following any one: (1) include blue color spectrum LED mould
Group and red spectrum LED module；It (2) include blue color spectrum LED module, red spectrum LED module and ultraviolet spectra LED module；
It (3) include blue color spectrum LED module, red spectrum LED module and full-spectrum LED mould group；It (4) include blue color spectrum LED module
With full-spectrum LED mould group；It (5) include red spectrum LED module and full-spectrum LED mould group；It (6) include ultraviolet spectra LED module
With full-spectrum LED mould group.The emission wavelength of the blue color spectrum LED module is 400nm~500nm；Red spectrum LED module
Emission wavelength is 600nm~700nm；The emission wavelength of ultraviolet spectra LED module is 260nm~400nm；Full-spectrum LED mould group
Emission wavelength be multiple color spectrums combination, wave-length coverage be 260nm~780nm.
As shown in Figure 2,3, the control in the present invention and drive module include that a control circuit and multiple driving circuits-are opened
Guan Zuhe is closed, each driving circuit-switching tube combination includes a driving circuit and a switching tube；Each LED module
With a driving circuit-switching tube combination.The optional switch mosfet pipe of switching tube, IGBT switching tube or triode.
In Fig. 2, each LED module it is matched switching tube series connection, be then attempted by LED driver two output ends it
Between；In each driving circuit-switching tube combination, driving circuit one end connects the signal input part of its switching tube, driving circuit
The other end is connected to the control circuit.LED driver is constant-current LED driver, the voltage rating of LED module each in general
It is not much different when 50%, control effect is preferably (such as between 1 voltage rating 48V of mould group, 2 voltage range 24V-96V of mould group).
When each LED module voltage rating differs larger, electric current distributes (power distribution), and there are relatively large deviation, Ke Nengxu with PWM duty cycle
It to correct according to the actual situation.One switching tube (can be MOSFET, IGBT, triode etc.) of each LED module series connection, by controlling
The switch of each switching tube of circuit control processed.The turn-on time of the concatenated switching tube of each LED module is controlled by control circuit,
And then control the power and average current of each LED module.
In Fig. 3, each LED module series connection is followed by two output ends of LED driver；In each driving circuit-switching tube group
In conjunction, switching tube is attempted by the both ends of corresponding LED module, and one end of driving circuit connects the signal input part of its switching tube, drives
The other end of dynamic circuit is connected to the control circuit.Using constant-current LED driver, the voltage rating of each LED module is not made
It is required that controlling the switch of each switching tube by control circuit as long as LED driver can be worked normally, each LED mould is controlled
The turn-on time of group switching tube in parallel, and then control the power and average current of each LED module.
The multiple-channel output control of LED light supplementing lamp for plants, including two kinds of sides can be realized based on aforementioned multiple-channel output control circuit
Formula:
Mode one is that the output all the way of LED driver is divided into multiple-channel output by pulsewidth modulation (PWM): each road output
The sum of percentage of occupancy is 100%, is adjusted by pulsewidth modulation to per the accounting exported all the way, realizes and export to every road
The control of power.
Mode two is to drive the output all the way of LED driver being divided into multiple-channel output by timesharing: every road output occupies one
The fixed time (for example the first via exports 10 minutes, and then the second tunnel exports 20 minutes, then the output of third road 5 minutes etc.), often
It is secondary only to export all the way, the length of time and watt level of every road output are set by control circuit.
No matter LED module is series model or paralleling model, is all to control LED mould by the switch of corresponding switching tube
The turn-on and turn-off of group.Switch time can be high frequency, i.e., common PWM wave is (such as more than 1 kHz of switching frequency specific
The square wave of duty ratio), it is also possible to (for example 2 hours are connected in mould group 1, and 3 hours etc. are connected in mould group 2) of low frequency.
The control method is realized based on control circuit, and control circuit can be realized there are many mode:
(1) it manually controls:
By stirring switch or knob in control circuit, the duty ratio or turn-on time of each LED module are adjusted；
(2) it is realized and is automatically controlled using MCU or PLC chip
The embedded software functional module in MCU or PLC chip, needs according to plant growing cycle to light irradiation time, light
It is configured according to period, feux rouges or blue laser output；Illumination is realized by the automatic control to switch or knob in control circuit
Condition switching；The demand of various plants can be preset, carries out light control automatically, accurate light is realized in plant growing cycle
According to.
(3) automatic control under radio condition
The embedded software functional module in MCU or PLC chip, and combining wireless communication module utilize hand-held intelligent end
End or remote control computer need to carry out light irradiation time, periodicity of illumination, feux rouges or blue laser output according to plant growing cycle
Setting；Illumination condition switching is realized by the automatic control to switch or knob in control circuit.
By increasing wireless module, more flexible, more optimized control may be implemented.Wireless module connects network server,
The light required time period of corresponding plant can be arranged in user on network, then carry out wireless control.Once replacement plantation
Plant can switch corresponding setting at once, and setting can manually adjust optimization.It is powered off meeting with, module failure lamp etc.
In the case of, server can fast notification administrator safeguard.Plant light compensation system and greenhouse control system can be carried out
It organically combines, obtains more plant environment information, such as daylight situation, temperature and humidity situation etc. carries out plant light compensation situation micro-
It adjusts, optimizes light filling effect.
Using example:
Assuming that 50W can be exported by increasing the device and be divided into two-way, be used for feux rouges by some LED output power 50W
With the LED module of blue light.By control device, 50W feux rouges can be exported, 50W blue light or red each 25W of indigo plant can also be exported,
Or feux rouges 40W, blue light 10W etc..The ratio of red blue light can be can be by controller electrodeless adjustment, control mode using nothing
The controller of line is also possible to using wired controller.
This programme is only used only 1 LED driver and adds 2 low tension switch pipes (LED module voltage is generally lower) and driving
Circuit realizes the getable effect of ability for needing 2 LED drivers, and cost is less than 10 yuan, and a LED driver price
It is tens of to be differed to hundreds of, significantly reduce cost.And according to the number of output different wave length LED module, different mould group numbers
More, cost savings are bigger.
Claims (10)
1. a kind of multiple-channel output control circuit for LED light supplementing lamp for plants, including LED driver and LED multi-path mould group；It is special
Sign is, further includes the control and driving mould for LED driver output to be divided into multichannel to power to each LED module
Block；The control and drive module include a control circuit and multiple driving circuits-switching tube combination, each driving circuit-
Switching tube combination includes a driving circuit and a switching tube；Each LED module matches a driving circuit-switching tube group
It closes.
2. multiple-channel output control circuit according to claim 1, which is characterized in that the LED multi-path mould group refers at least 2
Paths of LEDs mould group.
3. multiple-channel output control circuit according to claim 1, which is characterized in that the matched switch of each LED module
Pipe series connection, is then attempted by between two output ends of LED driver；In each driving circuit-switching tube combination, driving circuit
One end connects the signal input part of its switching tube, and the other end of driving circuit is connected to the control circuit.
4. multiple-channel output control circuit according to claim 1, which is characterized in that each LED module series connection is followed by LED driving
Two output ends of dynamic device；In each driving circuit-switching tube combination, switching tube is attempted by the both ends of corresponding LED module, driving
One end of circuit connects the signal input part of its switching tube, and the other end of driving circuit is connected to the control circuit.
5. multiple-channel output control circuit according to claim 1, which is characterized in that the switching tube is switch mosfet
Pipe, IGBT switching tube or triode.
6. multiple-channel output control circuit according to claim 1, which is characterized in that the composition side of the LED multi-path mould group
Formula be it is following any one:
It (1) include blue color spectrum LED module and red spectrum LED module；
It (2) include blue color spectrum LED module, red spectrum LED module and ultraviolet spectra LED module；
It (3) include blue color spectrum LED module, red spectrum LED module and full-spectrum LED mould group；
It (4) include blue color spectrum LED module and full-spectrum LED mould group；
It (5) include red spectrum LED module and full-spectrum LED mould group；
It (6) include ultraviolet spectra LED module and full-spectrum LED mould group.
7. multiple-channel output control circuit according to claim 6, which is characterized in that the hair of the blue color spectrum LED module
A length of 400nm~the 500nm of light wave；The emission wavelength of red spectrum LED module is 600nm~700nm；Ultraviolet spectra LED module
Emission wavelength be 260nm~400nm；The emission wavelength of full-spectrum LED mould group is the combination of multiple color spectrums, wavelength model
It encloses for 260nm~780nm.
8. the method that the multiple-channel output control of LED light supplementing lamp for plants is realized based on multiple-channel output control circuit described in claim 1,
It is characterized in that, being that the output all the way of LED driver is divided into multiple-channel output by pulsewidth modulation (PWM): each road output occupies
The sum of percentage be 100%, be adjusted, realized to every road output power to per the accounting exported all the way by pulsewidth modulation
Control.
9. the method that the multiple-channel output control of LED light supplementing lamp for plants is realized based on multiple-channel output control circuit described in claim 1,
It is characterized in that, being to drive the output all the way of LED driver being divided into multiple-channel output by timesharing: every road output occupies certain
Time (for example the first via exports 10 minutes, and then the second tunnel exports 20 minutes, then the output of third road 5 minutes etc.), every time only
Have and export all the way, the length of time and watt level of every road output are set by control circuit.
10. method according to claim 8 or claim 9, which is characterized in that by control circuit by it is following in the way of any one it is real
The multiple-channel output control of existing LED light supplementing lamp for plants:
(1) it manually controls:
By stirring switch or knob in control circuit, the duty ratio or turn-on time of each LED module are adjusted；
(2) it is realized and is automatically controlled using MCU or PLC chip
The embedded software functional module in MCU or PLC chip is needed according to plant growing cycle to light irradiation time, illumination week
Phase, feux rouges or blue laser output are configured；Illumination condition is realized by the automatic control to switch or knob in control circuit
Switching；
(3) automatic control under radio condition
The embedded software functional module in MCU or PLC chip, and combining wireless communication module, using hand-held intelligent terminal or
Remote control computer needs to set light irradiation time, periodicity of illumination, feux rouges or blue laser output according to plant growing cycle
It sets；Illumination condition switching is realized by the automatic control to switch or knob in control circuit.
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| CN201910786962.7A CN110493917A (en) | 2019-08-24 | 2019-08-24 | A kind of multiple-channel output control circuit and method for LED light supplementing lamp for plants |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110972372A (en) * | 2019-12-26 | 2020-04-07 | 上海唐盛信息科技有限公司 | High-pressure sodium lamp for plant cultivation room |
| CN111064520A (en) * | 2019-12-19 | 2020-04-24 | 成都优博创通信技术股份有限公司 | Optical module |
| CN113453408A (en) * | 2020-03-26 | 2021-09-28 | 浙江宇视科技有限公司 | Light supplement drive control circuit and method and network camera |
| CN114474157A (en) * | 2022-02-18 | 2022-05-13 | 坎德拉（深圳）科技创新有限公司 | Light filling device and robot |
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Application publication date: 20191122 |