CN208509326U - A kind of Double-way light regulating circuit - Google Patents
A kind of Double-way light regulating circuit Download PDFInfo
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- CN208509326U CN208509326U CN201821135742.5U CN201821135742U CN208509326U CN 208509326 U CN208509326 U CN 208509326U CN 201821135742 U CN201821135742 U CN 201821135742U CN 208509326 U CN208509326 U CN 208509326U
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Abstract
The utility model provides a kind of Double-way light regulating circuit, and PWM modulator is enabled to export pwm control signal to optic coupling element；Optic coupling element receives pwm control signal and exports high level signal or low level signal to the first control module；First control module controls itself conducting and lights the first lamp string to be controlled when receiving high level signal, and exports low level signal to the second control module；It controls itself to disconnect when receiving low level signal and extinguishes the first lamp string to be controlled, and export high level signal to the second control module；Second control module controls itself conducting when receiving high level signal and lights the second lamp string to be controlled；Itself is controlled when receiving low level signal and is disconnected extinguishes the second lamp string to be controlled, the technical issues of two optic coupling elements realize light modulation and the color-temperature regulating of two-way lamp string need to be respectively driven with two-way pwm signal by solving, reach light modulation and the color-temperature regulating for only needing pwm signal all the way while controlling two-way lamp string, saves the technical effect of cost.
Description
Technical field
The utility model relates to field of circuit technology, more particularly, to a kind of Double-way light regulating circuit.
Background technique
Currently, with the continuous development of society, people's lives level is continuously improved, and demand of the people to illumination is increasingly
Diversification.Other than having different adjusting requirements to the brightness of illumination, in order to configure more light environments, color temperature adjustment
Demand is also more and more.
It can control the LED light string of two-way different-colour under normal circumstances to realize the light modulation and color temperature adjustment of whole lamp, pass
The technology of system needs to respectively drive two optocoupler LED drive chips using two-way pwm signal, realizes the tune to two paths of LED lamp string
Light and color temperature adjustment, higher cost.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Double-way light regulating circuit, to alleviate two-way to be realized
Light modulation needs two-way pwm signal to respectively drive two optocoupler LED drive chips, realizes light modulation and colour temperature to two paths of LED lamp string
The technical issues of adjusting, higher cost.
In a first aspect, the utility model embodiment provides a kind of Double-way light regulating circuit, comprising: cascade PWM modulator,
Optic coupling element, the first control module and the second control module；
The PWM modulator exports pwm control signal to the optic coupling element；
The optic coupling element receives the pwm control signal and controls mould to described first according to the pwm control signal
Block exports high level signal or low level signal；
First control module controls itself conducting when receiving high level signal, lights the first lamp string to be controlled,
And low level signal is exported to second control module；Itself is controlled when receiving low level signal to disconnect, and extinguishes first
Lamp string to be controlled, and high level signal is exported to second control module；
Second control module controls itself conducting when receiving high level signal and lights the second lamp string to be controlled；?
Itself is controlled when receiving low level signal and is disconnected extinguishes the second lamp string to be controlled.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the optic coupling element includes photophore terminal, light-receiving device terminal and signal amplifier terminal；
The photophore terminal is connect with the output end of the PWM modulator, for the hair when receiving high level signal
Light out；
The light-receiving device terminal is used to generate photoelectric current after detecting the light that the photophore issues；
The signal amplifier terminal is used to believe the photoelectric current amplification output level when detecting the photoelectric current
Number.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, first control module includes first input end, first lead-out terminal and second output terminal；
The first input end is connect with the signal amplifier terminal of the optic coupling element, for receiving the optocoupler member
The level signal of part output, if the high level signal for receiving optic coupling element output controls the first lead-out terminal and the
The conducting of two output terminals；
If the low level signal for receiving the optic coupling element output controls the first lead-out terminal and second output terminal
The disconnection of son.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, first control module includes the first metal-oxide-semiconductor and the first divider resistance；
The first terminal of first metal-oxide-semiconductor is connect with the cathode of the described first lamp string to be controlled；
The Second terminal of first metal-oxide-semiconductor is connect with the first terminal of first divider resistance；
The third terminal of first metal-oxide-semiconductor is connect with the Second terminal of first divider resistance.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, first control module further includes the second divider resistance:
The first terminal of second divider resistance is connect with the anode of the described first lamp string to be controlled；
The Second terminal of second divider resistance is connect with the first terminal of first divider resistance.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, second control module includes the second input terminal, third output terminal and the 4th output terminal；
Second input terminal is connect with second output terminal of first control module, for receiving described first
The level signal of control module output, if the high level signal control third for receiving the first control module output is defeated
The conducting of terminal and the 4th output terminal out；
If the low level signal for receiving first control module output controls the third output terminal and the 4th defeated
The disconnection of terminal out.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, second control module includes the second metal-oxide-semiconductor and third divider resistance；
The first terminal of second metal-oxide-semiconductor is connect with the cathode of the described second lamp string to be controlled；
The Second terminal of second metal-oxide-semiconductor is connect with the first terminal of the third divider resistance；
The third terminal of second metal-oxide-semiconductor is connect with the Second terminal of the third divider resistance.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, second control module further includes the 4th divider resistance:
The first terminal of 4th divider resistance is connect with the anode of the described second lamp string to be controlled；
The Second terminal of 4th divider resistance is connect with the first terminal of the third divider resistance.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, second control module further includes diode:
The first terminal of the diode is connect with the second input terminal of second control module；
The Second terminal of the diode is connect with the first terminal of the third divider resistance.
With reference to first aspect, the utility model embodiment provides the 9th kind of possible embodiment of first aspect,
In, the circuit further includes the first lamp string to be controlled and the second lamp string to be controlled；
First lamp string to be controlled is connect with first control module；
Second lamp string to be controlled is connect with second control module.
The utility model embodiment brings following the utility model has the advantages that the utility model embodiment is by providing a kind of two-way tune
Optical circuit, comprising: cascade PWM modulator, optic coupling element, the first control module and the second control module；Enable PWM modulator to
Optic coupling element exports pwm control signal；Optic coupling element receives pwm control signal and exports high level signal to the first control module
Or low level signal；First control module controls itself conducting and lights the first lamp string to be controlled when receiving high level signal, and to
Second control module exports low level signal；Itself is controlled when receiving low level signal and is disconnected extinguishes the first lamp string to be controlled,
And high level signal is exported to the second control module；Second control module controls itself conducting when receiving high level signal and lights
Second lamp string to be controlled；Itself is controlled when receiving low level signal and is disconnected extinguishes the second lamp string to be controlled.
The utility model embodiment is by being arranged cascade PWM modulator, optic coupling element, the first control module and the second control
Molding block reaches without respectively driving light modulation and the color-temperature regulating that two optic coupling elements realize two-way lamp string with two-way pwm signal
It only needs pwm signal all the way while controlling light modulation and the color-temperature regulating of two-way lamp string, save the technical effect of cost.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of Double-way light regulating circuit composition schematic diagram provided by the embodiment of the utility model；
Fig. 2 is the circuit diagram of optic coupling element 2 in Fig. 1；
Fig. 3 is the second control module circuit diagram in Fig. 1；
Fig. 4 is a kind of Double-way light regulating circuit diagram provided by the embodiment of the utility model.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
Now with the continuous development of society, people's lives level is continuously improved, and demand of the people to illumination is increasingly
Diversification.Other than having different adjusting requirements to the brightness of illumination, in order to configure more light environments, color temperature adjustment
Demand is also more and more.
It can control the LED light string of two-way different-colour under normal circumstances to realize the light modulation and color temperature adjustment of whole lamp, pass
The technology of system needs to respectively drive two optocoupler LED drive chips using two-way pwm signal, realizes the tune to two paths of LED lamp string
Light and color temperature adjustment, higher cost are based on this, and a kind of Double-way light regulating circuit provided by the embodiment of the utility model can pass through
Cascade PWM modulator, optic coupling element, the first control module and the second control module are set, and only pwm signal can be same all the way for need
When control two-way lamp string light modulation and color-temperature regulating, save the technical effect of cost.
For convenient for understanding the present embodiment, first to a kind of electricity of Double-way light regulating disclosed in the utility model embodiment
Road describes in detail, as shown in Figure 1, the Double-way light regulating circuit includes: cascade PWM modulator 1, optic coupling element 2, first
Control module 3 and the second control module 4；
The PWM modulator is used to export pwm control signal to the optic coupling element；
The optic coupling element receives the pwm control signal and controls mould to described first according to the pwm control signal
Block exports high level signal or low level signal；
First control module controls itself conducting when receiving high level signal, lights the first lamp string to be controlled,
And low level signal is exported to second control module；Itself is controlled when receiving low level signal to disconnect, and extinguishes first
Lamp string to be controlled, and high level signal is exported to second control module；
Second control module controls itself conducting when receiving high level signal and lights the second lamp string to be controlled；?
Itself is controlled when receiving low level signal and is disconnected extinguishes the second lamp string to be controlled.
In the utility model embodiment, the PWM modulator can refer to pulse-width modulator, for exporting PWM control
Signal processed；In the utility model embodiment, the pwm control signal can refer to the impulse waveform of variable duty ratio, the PWM
Modulator can export that a series of amplitudes are equal and the unequal pulse of width, carry out by width of certain rule to each pulse
Modulation, if enabling frequency constant, is directly changed the width of pulse, can control the turn-on time of switch element.PWM control technology is just
It is that the turn-on and turn-off of semiconductor switch device are controlled.
In the utility model embodiment, the first control module is receiving high electricity for controlling the first lamp string to be controlled
The first lamp string to be controlled can be lighted when ordinary mail, while to the second control module one low level can occur for the first control module
Signal, the second control module be used to control the second lamp string to be controlled, the second control module when receiving low level signal, itself
It can not be connected, so that the second lamp string to be controlled does not work.By the utility model embodiment, the state of first lamp string to be controlled
State with the second lamp string to be controlled is opposite always.
The utility model embodiment is by being arranged cascade PWM modulator, optic coupling element, the first control module and the second control
Molding block reaches without respectively driving light modulation and the color-temperature regulating that two optic coupling elements realize two-way lamp string with two-way pwm signal
It only needs pwm signal all the way while controlling light modulation and the color-temperature regulating of two-way lamp string, save the technical effect of cost.
In the another embodiment of the utility model, as shown in Fig. 2, the optic coupling element include photophore terminal 21, by
Light device terminal 21 and signal amplifier terminal 23；
The photophore terminal is connect with the output end of the PWM modulator, for the hair when receiving high level signal
Light out；
The light-receiving device terminal is used to generate photoelectric current after detecting the light that the photophore issues；
The signal amplifier terminal is used to believe the photoelectric current amplification output level when detecting the photoelectric current
Number.
In the utility model embodiment, the impulse waveform that PWM modulator can be can be changed with output duty cycle, with the PWM
When receiving high level signal, the conducting of photophore terminal emits beam the optic coupling element of modulator necklace, the inspection of light-receiving device terminal
Measuring light can produce photoelectric current later, and the photoelectric current can export an electricity after prime number amplifier terminals are handled
Ordinary mail number.It may be implemented to convert electrical signals into optical signal and then reconvert at electric signal, in fact by the utility model embodiment
The purpose of conversion unlike signal is showed.
In the another embodiment of the utility model, first control module includes first input end, the first output
Terminal and second output terminal；
The first input end is connect with the signal amplifier terminal of the optic coupling element, for receiving the optocoupler member
The level signal of part output, if the high level signal for receiving optic coupling element output controls the first lead-out terminal and the
The conducting of two output terminals；
If the low level signal for receiving the optic coupling element output controls the first lead-out terminal and second output terminal
The disconnection of son.
In the utility model embodiment, when the conducting of the first lead-out terminal and second output terminal, described
The lamp string energization to be controlled of the first of one control module control is lighted.
In the another embodiment of the utility model, first control module includes the first metal-oxide-semiconductor and the first partial pressure electricity
Resistance；
The first terminal of first metal-oxide-semiconductor is connect with the cathode of the described first lamp string to be controlled；
The Second terminal of first metal-oxide-semiconductor is connect with the first terminal of first divider resistance；
The third terminal of first metal-oxide-semiconductor is connect with the Second terminal of first divider resistance.
In the utility model implementation, the first terminal of the metal-oxide-semiconductor is connected with the cathode of the described first lamp string to be controlled,
It can control lighting and extinguishing for the first lamp string to be controlled.First divider resistance can play protection to the metal-oxide-semiconductor and make
With preventing metal-oxide-semiconductor to be broken down by high-voltage.
In the another embodiment of the utility model, first control module further includes the second divider resistance:
The first terminal of second divider resistance is connect with the anode of the described first lamp string to be controlled；
The Second terminal of second divider resistance is connect with the first terminal of first divider resistance.
In the utility model implementation, the main effect of the second divider resistance is also by itself sharing a part of electricity
Pressure, protects the Double-way light regulating circuit.
In the another embodiment of the utility model, second control module includes the second input terminal, third output
Terminal and the 4th output terminal；
Second input terminal is connect with second output terminal of first control module, for receiving described first
The level signal of control module output, if the high level signal control third for receiving the first control module output is defeated
The conducting of terminal and the 4th output terminal out；
If the low level signal for receiving first control module output controls the third output terminal and the 4th defeated
The disconnection of terminal out.
In the another embodiment of the utility model, as shown in figure 3, second control module includes the second metal-oxide-semiconductor 41
With third divider resistance 42；
The first terminal of second metal-oxide-semiconductor is connect with the cathode of the described second lamp string to be controlled；
The Second terminal of second metal-oxide-semiconductor is connect with the first terminal of the third divider resistance；
The third terminal of second metal-oxide-semiconductor is connect with the Second terminal of the third divider resistance.
In the another embodiment of the utility model, as shown in figure 3, second control module further includes the 4th partial pressure electricity
Resistance 43:
The first terminal of 4th divider resistance is connect with the anode of the described second lamp string to be controlled；
The Second terminal of 4th divider resistance is connect with the first terminal of the third divider resistance.
In the another embodiment of the utility model, as shown in figure 3, second control module further includes diode 44:
The first terminal of the diode is connect with the second input terminal of second control module；
The Second terminal of the diode is connect with the first terminal of the third divider resistance.
In the utility model embodiment, when the second receiving module receives low voltage signal, the diode is not led
Logical, the lamp string extinguishing to be controlled of the second of the second control module control does not work；When the second receiving module receives high voltage letter
Number when, the diode current flow, the lamp string energization to be controlled of the second of second control module control is lighted.
By the utility model embodiment, may be implemented to reach the second lamp string to be controlled of control by the way that the diode is arranged
Purpose.
In the another embodiment of the utility model, as shown in figure 4, the circuit further includes the first 5 He of lamp string to be controlled
Second lamp string 6 to be controlled；
First lamp string 5 to be controlled is connect with first control module；
Second lamp string 6 to be controlled is connect with second control module 4.
In the utility model embodiment, the first control module is used to control the state of the first lamp string to be controlled, the second control
Molding block is for controlling the second lamp string to be controlled.
In the utility model embodiment, the Double-way light regulating circuit integrated circuit schematic diagram can be as shown in Fig. 4, institute
The pulse of certain duty ratio can be exported by stating PWM modulator；The optic coupling element 2 is connect with the PWM modulator；Described first
Control module may include the first metal-oxide-semiconductor, the first divider resistance and the second divider resistance, and first control module can control
First lamp string to be controlled；Second control module may include the second metal-oxide-semiconductor, third divider resistance, the 4th divider resistance and
Diode, second control module is for controlling the second lamp string to be controlled.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of Double-way light regulating circuit characterized by comprising cascade PWM modulator, optic coupling element, the first control module
With the second control module；
The PWM modulator exports pwm control signal to the optic coupling element；
The optic coupling element receives the pwm control signal and defeated to first control module according to the pwm control signal
High level signal or low level signal out；
First control module controls itself conducting when receiving high level signal, lights the first lamp string to be controlled, and to
Second control module exports low level signal；Itself is controlled when receiving low level signal to disconnect, and it is to be controlled to extinguish first
Lamp string processed, and high level signal is exported to second control module；
Second control module controls itself conducting when receiving high level signal and lights the second lamp string to be controlled；It is receiving
Itself is controlled when to low level signal and is disconnected extinguishes the second lamp string to be controlled.
2. Double-way light regulating circuit according to claim 1, which is characterized in that the optic coupling element include photophore terminal,
Light-receiving device terminal and signal amplifier terminal；
The photophore terminal is connect with the output end of the PWM modulator, for issuing light when receiving high level signal
Line；
The light-receiving device terminal is used to generate photoelectric current after detecting the light that the photophore issues；
The signal amplifier terminal is used for the photoelectric current amplification outputs level signals when detecting the photoelectric current.
3. Double-way light regulating circuit according to claim 1, which is characterized in that first control module includes the first input
Terminal, first lead-out terminal and second output terminal；
The first input end is connect with the signal amplifier terminal of the optic coupling element, defeated for receiving the optic coupling element
Level signal out, if the high level signal for receiving optic coupling element output controls the first lead-out terminal and second defeated
The conducting of terminal out；
If the low level signal for receiving optic coupling element output controls the first lead-out terminal and second output terminal
It disconnects.
4. Double-way light regulating circuit according to claim 2, which is characterized in that first control module includes the first MOS
Pipe and the first divider resistance；
The first terminal of first metal-oxide-semiconductor is connect with the cathode of the described first lamp string to be controlled；
The Second terminal of first metal-oxide-semiconductor is connect with the first terminal of first divider resistance；
The third terminal of first metal-oxide-semiconductor is connect with the Second terminal of first divider resistance.
5. Double-way light regulating circuit according to claim 4, which is characterized in that first control module further includes second point
Piezoresistance:
The first terminal of second divider resistance is connect with the anode of the described first lamp string to be controlled；
The Second terminal of second divider resistance is connect with the first terminal of first divider resistance.
6. Double-way light regulating circuit according to claim 1, which is characterized in that second control module includes the second input
Terminal, third output terminal and the 4th output terminal；
Second input terminal is connect with second output terminal of first control module, for receiving first control
The level signal of module output, if the high level signal for receiving the first control module output controls the third output end
The conducting of son and the 4th output terminal；
If the low level signal for receiving the first control module output controls the third output terminal and the 4th output end
The disconnection of son.
7. Double-way light regulating circuit according to claim 6, which is characterized in that second control module includes the 2nd MOS
Pipe and third divider resistance；
The first terminal of second metal-oxide-semiconductor is connect with the cathode of the described second lamp string to be controlled；
The Second terminal of second metal-oxide-semiconductor is connect with the first terminal of the third divider resistance；
The third terminal of second metal-oxide-semiconductor is connect with the Second terminal of the third divider resistance.
8. Double-way light regulating circuit according to claim 7, which is characterized in that second control module further includes the 4th point
Piezoresistance:
The first terminal of 4th divider resistance is connect with the anode of the described second lamp string to be controlled；
The Second terminal of 4th divider resistance is connect with the first terminal of the third divider resistance.
9. Double-way light regulating circuit according to claim 7, which is characterized in that second control module further includes two poles
Pipe:
The first terminal of the diode is connect with the second input terminal of second control module；
The Second terminal of the diode is connect with the first terminal of the third divider resistance.
10. Double-way light regulating circuit according to claim 9, which is characterized in that the Double-way light regulating circuit further includes first
Lamp string to be controlled and the second lamp string to be controlled；
First lamp string to be controlled is connect with first control module；
Second lamp string to be controlled is connect with second control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135742.5U CN208509326U (en) | 2018-07-17 | 2018-07-17 | A kind of Double-way light regulating circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821135742.5U CN208509326U (en) | 2018-07-17 | 2018-07-17 | A kind of Double-way light regulating circuit |
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| CN208509326U true CN208509326U (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913525A (en) * | 2019-12-11 | 2020-03-24 | 国网北京市电力公司 | Double-bus adjustable color temperature lighting circuit |
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2018
- 2018-07-17 CN CN201821135742.5U patent/CN208509326U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913525A (en) * | 2019-12-11 | 2020-03-24 | 国网北京市电力公司 | Double-bus adjustable color temperature lighting circuit |
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