CN207266350U - LED dimming driving circuits and LED drive device - Google Patents

LED dimming driving circuits and LED drive device Download PDF

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Publication number
CN207266350U
CN207266350U CN201721355208.0U CN201721355208U CN207266350U CN 207266350 U CN207266350 U CN 207266350U CN 201721355208 U CN201721355208 U CN 201721355208U CN 207266350 U CN207266350 U CN 207266350U
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electronic switch
resistance
circuit
switch
led
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谢小荣
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Shenzhen Huarong Keyuan Electronic Technology Co Ltd
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Shenzhen Huarong Keyuan Electronic Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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Abstract

The utility model discloses a kind of LED dimming driving circuits and LED drive device, the drive circuit includes dim signal detection circuit, master controller and switch driving circuit and pwm signal output circuit, the dim signal detection circuit is used to access dim signal, and the output terminal of dim signal detection circuit is connected with master controller;The control terminal of master controller and the input terminal of switch driving circuit connect, and the output terminal of switch driving circuit is connected with the controlled end of pwm signal output circuit, and the output terminal of pwm signal output circuit is connected with LED light;Wherein, the pulse signal exported with controlling switch drive circuit according to the master controller turns on/off, so as to drive the switch driving circuit to turn on/off, and exports corresponding high/low level pulse drive signal, realizes driving LED light work.The utility model realizes the dimming function to LED light, reduces output power, energy conservation and environmental protection.

Description

LED dimming driving circuits and LED drive device
Technical field
LED light actuation techniques field is the utility model is related to, more particularly to a kind of LED dimming driving circuits and LED driving Device.
Background technology
At present, LED light have energy-saving and environmental protection, long lifespan, it is small many advantages, such as, such as illumination etc. should With conventional light source is progressively substituted, become the solid light source of a new generation.However, existing various LED lamp drive circuits are complicated, Of high cost, cost performance is low, and as raising of the people to illumination quality requirement, the LED light of constant brightness cannot meet The demand of people, is also unfavorable for saving the energy.
Utility model content
The main purpose of the utility model is to propose a kind of LED dimming driving circuits and LED drive device, it is intended to realization pair The dimming function of LED light, reduces output power, energy conservation and environmental protection, and improves LED light visual transform effect.
To achieve the above object, the utility model proposes a kind of LED dimming driving circuits, including dim signal detection electricity Road, master controller and switch driving circuit and pwm signal output circuit, the dim signal detection circuit are used to access light modulation letter Number, the output terminal of the dim signal detection circuit is connected with the master controller;The control terminal of the master controller with it is described The input terminal connection of switch driving circuit, the output terminal of the switch driving circuit are controlled with the pwm signal output circuit End connection, the output terminal of the pwm signal output circuit are connected with LED light;Wherein,
The dim signal detection circuit, for detecting externally input dim signal, and exports;
The master controller, for producing corresponding pulse signal according to the dim signal, and exports;
The switch driving circuit, for the pulse signal on/off exported according to the master controller;
The pwm signal output circuit, for being turned on/off according to the switch driving circuit, output is corresponding high/low Level pulse drive signal, to drive LED light to work.
Preferably, the dim signal detection circuit include first resistor, second resistance, 3rd resistor, the 4th resistance and First capacitance, the first end of the first resistor are the input terminal of the dim signal detection circuit, the of the first resistor The first end of first end and fourth resistance of two ends through the second resistance and the 3rd resistor interconnects;3rd electricity The second end of resistance is the output terminal of the dim signal detection circuit, and is connected with the first end of first capacitance;Described The first end of four resistance and the second end of first capacitance are grounded.
Preferably, the dim signal detection circuit further includes the 5th resistance and the first diode, the 5th resistance First end is connected with the first DC power supply, and the second end of the 5th resistance is connected with the anode of the first diode;Described first The cathode of diode is interconnected with the first resistor and the second resistance.
Preferably, the switch driving circuit includes the 6th resistance, the 7th resistance, the 8th resistance and the first electronic switch, The first end of 6th resistance is the input terminal of the switch driving circuit, and is connected with the first end of the 7th resistance, The second end of 6th resistance is connected with the controlled end of first electronic switch;The first of first electronic switch is conductive Hold as the output terminal of institute's switch driving circuit, and be connected with the first end of the 8th resistance, first electronic switch it is defeated Outlet is grounded;The second end of 7th resistance is connected with the second end of the 8th resistance with the first DC power supply.
Preferably, first electronic switch is NPN type triode, and the base stage of the NPN type triode is described first The controlled end of electronic switch, the first conducting end of extremely described first electronic switch of current collection of the NPN type triode are described Second conducting end of extremely described first electronic switch of transmitting of NPN type triode.
Preferably, the pwm signal output circuit includes the second electronic switch and the 3rd electronic switch, second electronics Output terminal of the controlled end of switch and the 3rd electronic switch with the switch driving circuit is connected, second electronic cutting The first conducting end closed is connected with the first DC power supply;Second conducting end of second electronic switch and the 3rd electronic cutting The the first conducting end connection closed, the second conducting end ground connection of the 3rd electronic switch;Second electronic switch and described The common port of two electronic switches is the output terminal of the pwm signal output circuit.
Preferably, second electronic switch is NPN type triode, and the 3rd electronic switch is PNP type triode, institute The base stage for stating NPN type triode is the controlled end of second electronic switch, the current collection of the NPN type triode extremely described the First conducting end of two electronic switches, the second conducting end of extremely described second electronic switch of transmitting of the NPN type triode; The base stage of the PNP type triode is the controlled end of the 3rd electronic switch, and the current collection of the PNP type triode is extremely described First conducting end of the second electronic switch, the second of extremely described second electronic switch of transmitting of the PNP type triode are conductive End.
Preferably, the master controller is STM8S003F3P3 type microcontrollers.
The utility model also proposes a kind of LED drive device, including LED light and the upper LED dimming driving circuits;Institute Stating LED dimming driving circuits includes dim signal detection circuit, master controller and switch driving circuit and pwm signal output electricity Road, the dim signal detection circuit are used to access dim signal, output terminal and the master of the dim signal detection circuit Controller connects;The control terminal of the master controller is connected with the input terminal of the switch driving circuit, the switch drive electricity The output terminal on road is connected with the controlled end of the pwm signal output circuit, the output terminal and LED of the pwm signal output circuit Lamp connects;Wherein, the dim signal detection circuit, for detecting externally input dim signal, and exports;The main control Device, for producing corresponding pulse signal according to the dim signal, and exports;The switch driving circuit, for according to institute State the pulse signal on/off of master controller output;The pwm signal output circuit, for according to switch drive electricity Road turns on/off, and corresponding high/low level pulse drive signal is exported, to drive LED light to work.
The utility model is by setting master controller, and the light modulation exported according to the dim signal detection circuit being attached thereto Signal produces corresponding pulse signal, and the pulse signal unlatching exported with controlling switch drive circuit according to the master controller/ Shut-off, so as to drive the switch driving circuit to turn on/off, and exports corresponding high/low level pulse drive signal, realizes Drive LED light work.The utility model according to the dim signal received, adjusts the duty cycle of pulse signal by controller, The duty cycle of the pwm signal of pwm signal output circuit is adjusted, adjustment output is realized to the voltage swing of LED light, so as to control The brightness of LED light.The utility model realizes the dimming function to LED light, reduces output power, energy conservation and environmental protection, and improve LED Lamp visual transform effect.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other attached drawings can also be obtained according to the structure shown in these attached drawings.
Fig. 1 is the function module signal that the utility model LED dimming driving circuits are applied to one embodiment of LED drive device Figure;
Fig. 2 is the electrical block diagram of one embodiment of LED dimming driving circuits in Fig. 1.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in drawings) Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment Two " etc. description is only used for description purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical solution is conflicting or can not realize The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of LED dimming driving circuits.
With reference to Fig. 1 and Fig. 2, in one embodiment of the utility model, which detects including dim signal Circuit 10, master controller 20 and switch driving circuit 30 and pwm signal output circuit 40.
The dim signal detection circuit 10 is used to access dim signal, the output terminal of the dim signal detection circuit 10 It is connected with the master controller 20;The control terminal of the master controller 20 is connected with the input terminal of the switch driving circuit 30, The output terminal of the switch driving circuit 30 is connected with the controlled end of the pwm signal output circuit 40, the pwm signal output The output terminal of circuit 40 is connected with LED light;Wherein,
The dim signal detection circuit 10, for detecting externally input dim signal, and exports;
The master controller 20, for producing corresponding pulse signal according to the dim signal, and exports;
The switch driving circuit 30, for the pulse signal on/off exported according to the master controller 20;
The pwm signal output circuit 40, for being turned on according to the switch driving circuit 30, output is corresponding High/low level pulse drive signal, to drive LED light to work.
In the present embodiment, master controller 20 can be realized using control chips such as DSP control system, microcontrollers, this reality Example is applied preferably using STM8S003F3P3 types microcontroller to implement.
It should be noted that the input terminal of dim signal detection circuit 10 can generally be received outside by communication interface J1 The dim signal of portion's input, one end of communication interface J1 can connect wireless communication line or key circuit, distant by receiving Control the user such as device, button and input the brightness regulated signal of setting, and according to brightness regulated signal, produce corresponding dim signal. In the present embodiment, dim signal detection circuit 10 can receive the voltage signal of externally input 0~10V, or receive exterior The pwm signal of input, and exported after corresponding voltage signal or pwm signal output are carried out voltage division processing to master controller 20, so that master controller 20 exports corresponding pulse signal according to corresponding voltage signal or pwm signal.
Control of the switch driving circuit 30 based on the master controller 20, driving electronic switch 30 are turned on or turned off.It is main The operating voltage of controller 20 is generally 5V, and the driving voltage of LED light is 10~35V, in order to improve the driving energy to LED light Power, switch driving circuit 30 are exported to pwm signal output circuit 40 after the pulse signal that master controller 20 exports is amplified, So that the pulse drive signal that pwm signal output circuit 40 is exported according to switch driving circuit 30, the PWM of high/low level is exported Signal is to LED light, so as to drive LED light to work.
The anode of LED light is connected with driving power, and cathode is connected with the output terminal of pwm signal output circuit 40, when PWM believes When number output circuit 40 exports low level pulse drive signal, it is lit, and in low level pulse drive signal, it is in Cut-off state is without being lit.Specifically, when switch driving circuit 30 receives the high level pulse letter of the output of master controller 20 Number when, switch driving circuit 30 is opened, and controls pwm signal output circuit 40 to export low level pulse signal to LED light, this When LED light cathode be low level, anode is lighted for high level.Exported when switch driving circuit 30 receives master controller 20 Low level pulse signal when, switch driving circuit 30 turns off, and control pwm signal output circuit 40 export high level pulse Signal to LED light, the at this time cathode of LED light and anode is high level without lighting.
It is understood that master controller 20 according to the dim signal received, adjusts the duty cycle of pulse signal, you can The duty cycle of the pwm signal of pwm signal output circuit 40 is adjusted, so as to fulfill the brightness of LED light is adjusted.
The utility model is exported according to the dim signal detection circuit 10 being attached thereto by setting master controller 20 Dim signal produces corresponding pulse signal, is believed with the pulse that controlling switch drive circuit 30 is exported according to the master controller 20 Number on/off, so as to drive the switch driving circuit 30 to turn on, and exports corresponding high/low level pulse driving Signal, realizes driving LED light work.The utility model, according to the dim signal received, adjusts pulse signal by controller Duty cycle, adjust the duty cycle of the pwm signal of pwm signal output circuit 40, realize that adjustment output is big to the voltage of LED light It is small, so as to control the brightness of LED light.The utility model realizes the dimming function to LED light, reduces output power, energy-saving ring Protect, and improve LED light visual transform effect.
With reference to Fig. 1 and Fig. 2, in a preferred embodiment, the dim signal detection circuit 10 includes first resistor R1, the Two resistance R2,3rd resistor R3, the 4th resistance R4 and the first capacitance C1, the first end of the first resistor R1 are believed for the light modulation The input terminal of number detection circuit 10, the second end of the first resistor R1 is through the second resistance R2's and 3rd resistor R3 First end and the interconnection of the first end of the 4th resistance R4;The second end of the 3rd resistor R3 is dim signal detection electricity The output terminal on road 10, and be connected with the first end of the first capacitance C1;The first end and described first of the 4th resistance R4 The second end of capacitance C1 is grounded.
Dim signal detection circuit 10 can receive the voltage signal of externally input 0~10V, and defeated through first resistor R1 Enter, which exports to master control through second resistance R2 and the 4th resistance R4 series connection partial pressures after 3rd resistor R3 current limlitings Device 20 processed, so that master controller 20 according to the corresponding magnitude of voltage size of the voltage signal, produces corresponding pulse signal, and it is defeated Go out.
In the present embodiment, the dim signal detection circuit 10 still further comprises the 5th resistance R5 and the first diode D1, the first end of the 5th resistance R5 are connected with the first DC power supply VCC1, the second end and first of the 5th resistance R5 The anode connection of diode D1;The cathode of the first diode D1 and the first resistor R1 and the second resistance R2 are mutual Even.
In the present embodiment, the magnitude of voltage size of the first DC power supply VCC1 is 12V, and the 5th resistance R5 is pull-up resistor, when The magnitude of voltage of external input voltage signal makes for 0V, and the voltage signal of the first DC power supply VCC1 outputs at this time is through second resistance R2 With the 4th resistance R4 connect partial pressure, and after 3rd resistor R3 current limlitings output to master controller 20, so set, master controller 20 The reference voltage that can be exported according to the first DC power supply VCC1 exported through the 5th resistance R5, to judge the voltage of outgoing input Signal magnitude, improves the detection sensitivity of master controller 20.Diode D1 is rectifier diode D1, for the second DC power supply Voltage carry out rectification after export.
With reference to Fig. 1 and Fig. 2, in a preferred embodiment, the switch driving circuit 30 includes the 6th resistance R6, the 7th electricity The first end for hindering R7, the 8th resistance R8 and the first electronic switch Q1, the 6th resistance R6 is the switch driving circuit 30 Input terminal, and be connected with the first end of the 7th resistance R7, second end and first electronic cutting of the 6th resistance R6 Close the controlled end connection of Q1;The first conducting end of the first electronic switch Q1 for institute's switch driving circuit 30 output terminal, and It is connected with the first end of the 8th resistance R8, the output head grounding of the first electronic switch Q1;The 7th resistance R7's Second end is connected with the second end of the 8th resistance R8 with the first DC power supply VCC1.
Wherein, the first electronic switch Q1 is NPN type triode, and the base stage of the NPN type triode is described first The controlled end of electronic switch Q1, the first conducting end of the extremely described first electronic switch Q1 of current collection of the NPN type triode, institute State the second conducting end of the extremely described first electronic switch Q1 of transmitting of NPN type triode.
In the present embodiment, the 7th resistance R7 provides bias voltage for the first electronic switch Q1, is exported when master controller 20 When pulse signal is high level, the first electronic switch Q1 conducting so that by the high level pulse signal that master controller 20 exports into Exported after row amplification, when the pulse signal that master controller 20 exports is low level, the first electronic switch Q1 cut-offs, and export low The pulse drive signal of level.It is understood that adjust the corresponding magnitude of voltage size of pulse signal of master controller 20, you can Adjust the conducting degree of the first electronic switch Q1, you can adjust the duty cycle size of pwm signal output circuit 40, realize LED light Light modulation.
With reference to Fig. 1 and Fig. 2, in a preferred embodiment, the pwm signal output circuit 40 includes the second electronic switch Q2 And the 3rd electronic switch Q3, the second electronic switch Q2 and the 3rd electronic switch Q3 controlled end with it is described switch drive The output terminal connection of dynamic circuit 30, the first conducting end of the second electronic switch Q2 are connected with the first DC power supply VCC1;Institute The second conducting end for stating the second electronic switch Q2 is connected with the first conducting end of the 3rd electronic switch Q3, the 3rd electronics Switch the second conducting end ground connection of Q3;The common port of the second electronic switch Q2 and the second electronic switch Q2 are described The output terminal of pwm signal output circuit 40.
Wherein, the second electronic switch Q2 is NPN type triode, and the 3rd electronic switch Q3 is PNP type triode, The base stage of the NPN type triode be the second electronic switch Q2 controlled end, the current collection extremely institute of the NPN type triode State the first conducting end of the second electronic switch Q2, the of the extremely described second electronic switch Q2 of transmitting of the NPN type triode Two conducting ends;The base stage of the PNP type triode is the controlled end of the 3rd electronic switch Q3, the PNP type triode The first conducting end of the extremely described second electronic switch Q2 of current collection, extremely described second electronics of transmitting of the PNP type triode Switch the second conducting end of Q2.
When master controller 20 exports the control signal of square-wave pulse to the second electronic switch Q2's and the 3rd electronic switch Q3 Base stage, so that drive the second electronic switch Q2 and the 3rd electronic switch Q3 to turn in turn, when square-wave pulse is high level, second Electronic switch Q2 is turned on, and the 3rd electronic switch Q3 is in cut-off state, so as to export low level pulse signal to LED light, makes LED light is in the conduction state and is lit.When square-wave pulse is low level, the 3rd electronic switch Q3 conductings, the second electronic cutting Close Q2 and be in cut-off state, so that the pulse signal for exporting high level makes LED light be in cut-off state without by point to LED light It is bright.
The utility model also proposes a kind of LED drive device, and the LED drive device includes B and LED tune as described above Light drive circuit.The detailed construction of the LED dimming driving circuits can refer to above-described embodiment, and details are not described herein again;It is appreciated that , due to having used above-mentioned LED dimming driving circuits in the utility model LED drive device, the utility model The embodiment of LED drive device includes whole technical solutions of above-mentioned LED dimming driving circuits whole embodiments, and reached Technique effect is also identical, and details are not described herein.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention, Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model Conversion, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (9)

1. a kind of LED dimming driving circuits, it is characterised in that including dim signal detection circuit, master controller and switch drive Circuit and pwm signal output circuit, the dim signal detection circuit are used to access dim signal, the dim signal detection electricity The output terminal on road is connected with the master controller;The control terminal of the master controller and the input terminal of the switch driving circuit connect Connect, the output terminal of the switch driving circuit is connected with the controlled end of the pwm signal output circuit, the pwm signal output The output terminal of circuit is connected with LED light;Wherein,
The dim signal detection circuit, for detecting externally input dim signal, and exports;
The master controller, for producing corresponding pulse signal according to the dim signal, and exports;
The switch driving circuit, for the pulse signal on/off exported according to the master controller;
The pwm signal output circuit, for being turned on/off according to the switch driving circuit, exports corresponding high/low level Pulse drive signal, to drive LED light to work.
2. LED dimming driving circuits as claimed in claim 1, it is characterised in that the dim signal detection circuit includes the One resistance, second resistance, 3rd resistor, the 4th resistance and the first capacitance, the first end of the first resistor are believed for the light modulation The input terminal of number detection circuit, first end of the second end of the first resistor through the second resistance and the 3rd resistor and The first end interconnection of 4th resistance;The second end of the 3rd resistor is the output terminal of the dim signal detection circuit, And it is connected with the first end of first capacitance;The first end of 4th resistance and the second end of first capacitance connect Ground.
3. LED dimming driving circuits as claimed in claim 2, it is characterised in that the dim signal detection circuit further includes 5th resistance and the first diode, the first end of the 5th resistance are connected with the first DC power supply, and the of the 5th resistance Two ends are connected with the anode of the first diode;The cathode of first diode and the first resistor and the second resistance are mutual Even.
4. LED dimming driving circuits as claimed in claim 1, it is characterised in that the switch driving circuit includes the 6th electricity Resistance, the 7th resistance, the 8th resistance and the first electronic switch, the first end of the 6th resistance is the defeated of the switch driving circuit Enter end, and be connected with the first end of the 7th resistance, the second end of the 6th resistance and first electronic switch by Control end connection;First conducting end of first electronic switch for institute's switch driving circuit output terminal, and with the described 8th electricity The first end connection of resistance, the output head grounding of first electronic switch;The second end of 7th resistance and the described 8th electricity The second end of resistance is connected with the first DC power supply.
5. LED dimming driving circuits as claimed in claim 4, it is characterised in that first electronic switch is three pole of NPN type Pipe, the base stage of the NPN type triode are the controlled end of first electronic switch, and the current collection of the NPN type triode is extremely First conducting end of first electronic switch, the second of extremely described first electronic switch of transmitting of the NPN type triode Conducting end.
6. LED dimming driving circuits as claimed in claim 1, it is characterised in that the pwm signal output circuit includes second The controlled end of electronic switch and the 3rd electronic switch, second electronic switch and the 3rd electronic switch with the switch The output terminal connection of drive circuit, the first conducting end of second electronic switch are connected with the first DC power supply;Described second Second conducting end of electronic switch is connected with the first conducting end of the 3rd electronic switch, and the second of the 3rd electronic switch Conducting end is grounded;The common port of second electronic switch and second electronic switch is the pwm signal output circuit Output terminal.
7. LED dimming driving circuits as claimed in claim 6, it is characterised in that second electronic switch is three pole of NPN type Pipe, the 3rd electronic switch be PNP type triode, the base stage of the NPN type triode be second electronic switch by Control end, the first conducting end of extremely described second electronic switch of current collection of the NPN type triode, the NPN type triode Second conducting end of extremely described second electronic switch of transmitting;The base stage of the PNP type triode for the 3rd electronic switch by Control end, the first conducting end of extremely described second electronic switch of current collection of the PNP type triode, three pole of positive-negative-positive Second conducting end of extremely described second electronic switch of transmitting of pipe.
8. the LED dimming driving circuits as described in claim 1 to 7 any one, it is characterised in that the master controller is STM8S003F3P3 type microcontrollers.
A kind of 9. LED drive device, it is characterised in that the LED tune including LED light and as described in claim 1 to 8 any one Light drive circuit.
CN201721355208.0U 2017-10-19 2017-10-19 LED dimming driving circuits and LED drive device Active CN207266350U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721355208.0U CN207266350U (en) 2017-10-19 2017-10-19 LED dimming driving circuits and LED drive device

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Application Number Priority Date Filing Date Title
CN201721355208.0U CN207266350U (en) 2017-10-19 2017-10-19 LED dimming driving circuits and LED drive device

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111474458A (en) * 2020-04-17 2020-07-31 歌尔微电子有限公司 L ED light source test tool and L ED light source test system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111474458A (en) * 2020-04-17 2020-07-31 歌尔微电子有限公司 L ED light source test tool and L ED light source test system
CN111474458B (en) * 2020-04-17 2022-08-19 歌尔微电子有限公司 LED light source test fixture and LED light source test system

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