CN101813260A - LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit - Google Patents
LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit Download PDFInfo
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Abstract
The invention provides an LED lamp device and a PWM (Pulse Width Modulation) direct current supply control circuit, relating to a supply control circuit of an LED lamp device. The supply control circuit is used for reducing the circuit structure of an LED drive circuit so as to increase the stability of lamp usage, and is beneficial to standard module production and replacement. The invention has the technical scheme that the supply input end of the LED drive circuit is connected the PWM direct current supply control circuit, and the PWM direct current supply control circuit is connected with a direct current; the PWM direct current supply control circuit comprises a semiconductor switching device and a control circuit thereof, the control circuit of the semiconductor switching device is connected with the semiconductor switching device, and the semiconductor switching device is connected in a loop of the LED drive circuit in series; and a PWM signal inputted into the direct current supply control circuit controls the on and off of the semiconductor switching device through the control circuit of the semiconductor switching device, so that the LED drive circuit drives the LED lamp according to the PWM signal.
Description
Technical field
The present invention relates to a kind of LED light fixture, particularly relate to the power control circuit of LED light fixture.
Background technology
Usually the LED street lamp when doing power output size (or saying the brightness size) adjusting, has two kinds of methods under the electric power thus supplied of power supply: the one, and the size of current of change load LED lamp pearl operate as normal, but this will have influence on the LED color temperature parameters; The 2nd, the Enable Pin of change DC-DC constant current parts realizes flowing through the break-make of LED electric current, thereby changes the power consumption of LED.
The power supply circuits schematic diagram of existing LED light fixture is above-mentioned second kind of situation as shown in Figure 1.Galvanic electrode line and negative line are connected respectively on the LED constant current source driving circuit, by its driving LED lamp; PWM dim signal source is connected on the LED constant current source driving circuit by two electrode lines and negative line equally, and is luminous by this drive circuit control led light source module.
Every branch road constant-current device of said apparatus all need be used 4 lines and connect (wherein 2 is respectively power positive cathode, and 2 is the both positive and negative polarity of pwm control signal in addition), perhaps power supply, the shared negative line of pwm control signal.The LED constant current source driving circuit of this method is integrated with power control circuit in it, to handle the PWM dim signal, output power of power supply is regulated by led drive circuit and is finished by regulating output current dutycycle mode, and input port has three at least, each drive circuit need be connected with three electric wires, the electrical equipment of drive circuit is more, and circuit structure is comparatively complicated, easily causes fault.
Summary of the invention
First technical problem to be solved by this invention is: a kind of LED lamp device is provided, in order to reduce the circuit structure of led drive circuit, with the stability of raising light fixture use, and helps standard modular production and replacing.
Second technical problem to be solved by this invention is: a kind of PWM dc source control circuit is provided, in order to reduce the circuit structure of led drive circuit, with the stability of raising light fixture use, and helps standard modular production and replacing.
In order to solve first technical problem of the present invention, the present invention proposes a kind of LED lamp device, comprises led drive circuit, and led drive circuit comprises power input; Described power input connects PWM dc source control circuit, and this PWM dc source control circuit is connected to direct current;
PWM dc source control circuit is made up of semiconductor switch device and control circuit thereof, and this semiconductor switch device control circuit is connected with this semiconductor switch device, and semiconductor switch device is connected in the loop of led drive circuit;
The pwm signal of input PWM dc source control circuit makes led drive circuit according to pwm signal driving LED lamp by the Kai Heguan of the control circuit control semiconductor switch device of semiconductor switch device.
In order to solve second technical problem of the present invention, the present invention proposes a kind of PWM dc source control circuit, and the input of this PWM dc source control circuit connects direct current, and its output is connected to the power input of led drive circuit;
PWM dc source control circuit is made up of semiconductor switch device and control circuit thereof, and this semiconductor switch device control circuit is connected with this semiconductor switch device, and semiconductor switch device is connected in the loop of led drive circuit;
The pwm signal of input PWM dc source control circuit makes led drive circuit according to pwm signal driving LED lamp by the Kai Heguan of the control circuit control semiconductor switch device of semiconductor switch device.
Preferably: described semiconductor switch device is an at least a switching tube in MOS switching tube, triode or the reverse-blocking tetrode thyristor.
Preferably: described semiconductor switch device comprises the control utmost point, and the control circuit of semiconductor switch device comprises the control utmost point mu balanced circuit and the triggering signal control circuit of semiconductor switch device;
The triggering signal control circuit connects control utmost point mu balanced circuit, and control utmost point mu balanced circuit is connected with the described control utmost point again;
Pwm signal sends the triggering signal control circuit to, controls the level of described control utmost point mu balanced circuit to the output of the control utmost point by the triggering signal control circuit.
Preferably: comprise second port that connects external PWM signal on the described triggering signal control circuit.Second port comprises the anodal pin and the negative pole pin of signal.
Preferably: the LED lamp device also comprises the PWM controller, comprises first port that is connected with the PWM controller on the described trigger signal controller circuit, and the PWM controller is connected with the trigger signal controller circuit by first port.First port comprises anodal pin, PWM controller power source input pin and the negative pole pin of signal.
Preferably: described first port is parallel with mu balanced circuit.
Preferably: described triggering signal control circuit comprises second optocoupler, and the input of second optocoupler connects described second port, and its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point;
Be in series with the 3rd diode that makes the unidirectional conducting of pwm signal in the input loop of second optocoupler.
Preferably: described triggering signal control circuit comprises first optocoupler, and the input of first optocoupler connects described first port, and its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point.
Preferably: described control utmost point mu balanced circuit comprises first diode and divider resistance;
The positive pole of first diode is connected to galvanic positive pole, and its negative pole is connected in series with the described control utmost point, is in series with divider resistance between first diode and the control utmost point.
Preferably: described control utmost point mu balanced circuit comprises first resistance of first diode, second diode, first voltage-stabiliser tube, dividing potential drop and second resistance of current limliting, and the mu balanced circuit in parallel with described first port comprises second voltage-stabiliser tube;
The positive pole of first diode is connected to galvanic positive pole, and its negative pole connects first resistance of dividing potential drop, second resistance of first resistance series connection current limliting of dividing potential drop, and second resistance of current limliting is connected to the described control utmost point;
First voltage-stabiliser tube, second diode and second voltage-stabiliser tube are connected successively, form serial regulating circuit, and second resistance of this serial regulating circuit and current limliting also connects, and is connected in series with first resistance of dividing potential drop; Wherein, first voltage-stabiliser tube is connected with first resistance of dividing potential drop, and the positive pole of second diode is connected with the positive pole of first voltage-stabiliser tube, and the negative pole of second voltage-stabiliser tube is connected with the negative pole of second diode, the plus earth of second voltage-stabiliser tube;
This serial regulating circuit is in parallel with control utmost point place circuit branch, makes control have stable level.
Preferably: described serial regulating circuit two ends are parallel with filter capacitor, and perhaps described mu balanced circuit two ends are parallel with filter capacitor.
Preferably: the input at optocoupler is in series with current-limiting resistance.
Preferably: described PWM dc source control circuit is provided with four multiplexing pins, i.e. first pin, second pin, three-prong and the 4th pin; Wherein, first pin is the power supply input of PWM controller, and second pin is multiplexing pwm signal input, and three-prong is first ground connection, and the 4th pin is second ground connection.
Beneficial effect of the present invention:
The galvanic input voltage to load of prior art is not modulated, and the voltage duty cycle of led drive circuit is regulated and finished by the drive circuit of each LED module; And the voltage that the present invention exports to led drive circuit at direct current had carried out duty cycle adjustment, this function is finished by galvanic auxiliary circuit (being PWM dc source control circuit), the driver of each LED module need not be born the processing of pwm signal, therefore circuit structure is simple than prior art, required electronic component reduces a lot, has so just improved the stability of light fixture.And because the electric wire that the present invention is connected to the LED module only needs two, the electric wire demand reduces, and the space is more discharged in the module, helps the design and the heat radiation of module.Because structure of the present invention is more simple, helps the production and the replacing of standardized module.
Description of drawings
Fig. 1 is the schematic block circuit diagram of prior art.
Fig. 2 is a schematic block circuit diagram of the present invention.
Fig. 3 is the circuit diagram of the embodiment of the invention.
The specific embodiment
The present invention proposes a kind of LED lamp device, comprises led drive circuit, and led drive circuit comprises power input; Power input connects PWM dc source control circuit, and this PWM dc source control circuit is connected to direct current.PWM dc source control circuit is made up of semiconductor switch device and control circuit thereof, and this semiconductor switch device control circuit is connected with this semiconductor switch device, and semiconductor switch device is connected in the loop of led drive circuit.The pwm signal of input PWM dc source control circuit makes led drive circuit according to pwm signal driving LED lamp by the Kai Heguan of the control circuit control semiconductor switch device of semiconductor switch device.
As shown in Figure 2, power supply adaptor comprises AC/DC DC converting circuit and PWM dc source control circuit, and the AC/DC DC converting circuit converts civil power 220V alternating current to direct current.The output of PWM dc source control circuit is connected to the power input of load.Loading section, each LED module comprises led drive circuit and led light source module, each led light source module is combined by a plurality of LED lamps.Three LED modules such as LED module 1, LED module 2 and LED module 3 are arranged among Fig. 2.Can also connect more LED module according to the actual power conditions of demand.
PWM dc source control circuit mainly is made of semiconductor switch device and control circuit thereof.Semiconductor switch device is preferably the MOS switching tube.The control utmost point of this switching tube is connecting the semiconductor switch device control circuit.
The semiconductor switch device control circuit mainly is made of control utmost point mu balanced circuit and triggering signal control circuit.Wherein, the triggering signal control circuit is connecting the PWM controller.In this example, the triggering signal control circuit has designed the pin of multiplexing external pwm signal input, therefore can also connect external PWM signal, and wherein pin pin2 is a complexing pin.The PWM controller has first port of three pins, and external PWM signal has second port of two pins.
Circuit diagram as shown in Figure 3, this figure provides the detailed design scheme of PWM dc source control circuit.The drain electrode of nmos switch pipe Q1 and the former utmost point are connected in the circuit loop of lighting load, and its control utmost point G connects the semiconductor switch device control circuit.
The semiconductor switch device control circuit is made up of triggering signal control circuit and control utmost point mu balanced circuit two parts.
Control utmost point mu balanced circuit comprises the first diode D1, the second diode D2, the first voltage-stabiliser tube Z1, is connected in parallel on the second voltage-stabiliser tube Z2 on first port, first resistance R 1 of dividing potential drop and second resistance R 2, the first filter capacitor C1 and the second filter capacitor C2 of current limliting.
The positive pole of the first diode D1 is connected to galvanic positive pole, and its negative pole connects first resistance R 1 of dividing potential drop, picks out second resistance R 2 of current limliting from first resistance R 1 of dividing potential drop, and second resistance R 2 of current limliting is connected to control utmost point G.
The first voltage-stabiliser tube Z1, the second diode D2 and the second voltage-stabiliser tube Z2 connect successively, form serial regulating circuit, and second resistance R 2 of this serial regulating circuit and current limliting also connects, and is connected in series with first resistance R 1 of dividing potential drop; Wherein, the first voltage-stabiliser tube Z1 is connected with first resistance R 1 of dividing potential drop, and the positive pole of the second diode D2 is connected with the positive pole of the first voltage-stabiliser tube Z1, and the negative pole of the second voltage-stabiliser tube Z2 is connected with the negative pole of the second diode D2, the plus earth of the second voltage-stabiliser tube Z2.The end of the first filter capacitor C1 is connected the negative pole of the first voltage-stabiliser tube Z1, its other end ground connection.The two ends that are connected in parallel on the second voltage-stabiliser tube Z2 of the second filter capacitor C2.
The triggering signal control circuit comprises the second optocoupler U2, the input of the second optocoupler U2 comprises two input pins of PWM, GND2, they connect second port, be connected with external PWM signal, one end of its output is connected with second resistance R 2 of the current limliting of control utmost point mu balanced circuit, and be connected on the control utmost point G other end ground connection.Be in series with the 3rd diode D3 that makes the unidirectional conducting of pwm signal in the input loop of the second optocoupler U2.
The input of the first optocoupler U1 of triggering signal control circuit connects first port, first port comprises VDD2, PWM and three pins of GND, and it is connected with the PWM controller, wherein, PWM is a complexing pin, and the PWM controller can not be connected on the port of pwm signal input simultaneously.The input of the first optocoupler U1 also is connected with the 3rd divider resistance R3.The input of the light emitting diode of the first optocoupler U1 and the second optocoupler U2 links together, and the 3rd divider resistance R3 provides the dividing potential drop protection to light emitting diode in two optocouplers simultaneously.One end ground connection of the output of the first optocoupler U1, the other end are connected and are connected to second resistance R 2 of the current limliting of control utmost point mu balanced circuit controls utmost point G.
Operation principle is as follows:
In the circuit, take out one group of voltage than taking out one group of voltage height from VDD1 and GND point from VDD2 and GND point, VDD1 and GND point take out one group of voltage, provide to trigger to the control utmost point G (also claiming the G utmost point) of switching tube Q1 through second resistance R 2 of current limliting to promote required operating voltage.
It is that pwm circuit for the PWM controller provides stable operating voltage that VDD2 and GND point take out one group of voltage.Because PWM controller end and external PWM signal end can not use simultaneously.
If external-connected port is installed when being the PWM controller, then by three external tapping VDD2 ,+three pins of PWM, GND are connected with it, VDD2 and GND are the both positive and negative polarity of working power ,+PWM and GND are the pwm signal control loop, GND is a common terminal.When if certain moment+PWM end is high level, flow into the first optocoupler U1 level led 1 pin and 2 pin just by the 3rd divider resistance R3, lumination of light emitting diode then, the quick triode conducting of U1 aurora of first optocoupler this moment, the current collection of phototriode is low level very, and then the point of the A in the circuit is a low level, the G that causes switching tube Q1 is low level very, so switching tube Q1 ends, then powered-down output, load lamp goes out.If when certain moment+PWM end is low level, in like manner can push away, power supply output is then opened in switching tube Q1 conducting this moment, and load lamp is bright.
If external-connected port is installed when being the device of external PWM signal, be that external PWM signal forms control loop then by+PWM and GND2, when if certain moment+PWM end is high level, flow into the second optocoupler U2 level led 1 pin and 2 pin just by the 3rd divider resistance R3, form the loop through the 3rd diode D3, lumination of light emitting diode then, the quick triode conducting of U2 aurora of second optocoupler this moment, the current collection of phototriode is low level very, then the A's in the circuit is low level, and causing the control utmost point G of switching tube Q1 is low level, so switching tube Q1 ends, then powered-down output, load lamp goes out.If when certain moment+PWM end is low level, in like manner can push away, power supply output is then opened in switching tube Q1 conducting this moment, and load lamp is bright.
Claims (20)
1. a LED lamp device comprises led drive circuit, and led drive circuit comprises power input; It is characterized in that: described power input connects PWM dc source control circuit, and this PWM dc source control circuit is connected to direct current;
PWM dc source control circuit is made up of semiconductor switch device and control circuit thereof, and this semiconductor switch device control circuit is connected with this semiconductor switch device, and semiconductor switch device is connected in the loop of led drive circuit;
The pwm signal of input PWM dc source control circuit makes led drive circuit according to pwm signal driving LED lamp by the Kai Heguan of the control circuit control semiconductor switch device of semiconductor switch device.
2. LED lamp device according to claim 1 is characterized in that: described semiconductor switch device is an at least a switching tube in MOS switching tube, triode or the reverse-blocking tetrode thyristor; Perhaps
Described PWM dc source control circuit is provided with four multiplexing pins, i.e. first pin, second pin, three-prong and the 4th pin; Wherein, first pin is the power supply input of PWM controller, and second pin is multiplexing pwm signal input, and three-prong is first ground connection, and the 4th pin is second ground connection; Perhaps
Described serial regulating circuit two ends are parallel with filter capacitor, and perhaps described mu balanced circuit two ends are parallel with filter capacitor; Perhaps
Input at optocoupler is in series with current-limiting resistance.
3. LED lamp device according to claim 1 is characterized in that: described semiconductor switch device comprises the control utmost point, and the control circuit of semiconductor switch device comprises the control utmost point mu balanced circuit and the triggering signal control circuit of semiconductor switch device;
The triggering signal control circuit connects control utmost point mu balanced circuit, and control utmost point mu balanced circuit is connected with the described control utmost point again;
Pwm signal sends the triggering signal control circuit to, controls the level of described control utmost point mu balanced circuit to the output of the control utmost point by the triggering signal control circuit.
4. LED lamp device according to claim 3 is characterized in that: comprise second port that connects external PWM signal on the described triggering signal control circuit.
5. LED lamp device according to claim 3, it is characterized in that: the LED lamp device also comprises the PWM controller, comprise first port that is connected with the PWM controller on the described trigger signal controller circuit, the PWM controller is connected with the trigger signal controller circuit by first port.
6. LED lamp device according to claim 5 is characterized in that: described first port is parallel with mu balanced circuit.
7. LED lamp device according to claim 4, it is characterized in that: described triggering signal control circuit comprises second optocoupler (U2), the input of second optocoupler (U2) connects described second port, and its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point;
Be in series with the 3rd diode (D3) that makes the unidirectional conducting of pwm signal in the input loop of second optocoupler (U2).
8. LED lamp device according to claim 5, it is characterized in that: described triggering signal control circuit comprises first optocoupler (U1), the input of first optocoupler (U1) connects described first port, and its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point.
9. according to claim 6,7 or 8 described LED lamp devices, it is characterized in that: described control utmost point mu balanced circuit comprises first diode (D1) and divider resistance;
The positive pole of first diode (D1) is connected to galvanic positive pole, and its negative pole is connected in series with the described control utmost point, is in series with divider resistance between first diode (D1) and the control utmost point.
10. LED lamp device according to claim 6, it is characterized in that: described control utmost point mu balanced circuit comprises first resistance (R1) of first diode (D1), second diode (D2), first voltage-stabiliser tube (Z1), dividing potential drop and second resistance (R2) of current limliting, and the mu balanced circuit in parallel with described first port comprises second voltage-stabiliser tube (Z2);
The positive pole of first diode (D1) is connected to galvanic positive pole, and its negative pole connects first resistance (R1) of dividing potential drop, second resistance (R2) of first resistance (R1) the series connection current limliting of dividing potential drop, and second resistance (R2) of current limliting is connected to the described control utmost point;
First voltage-stabiliser tube (Z1), second diode (D2) and second voltage-stabiliser tube (Z2) are connected successively, form serial regulating circuit, and second resistance (R2) of this serial regulating circuit and current limliting also connects, and is connected in series with first resistance (R1) of dividing potential drop; Wherein, first voltage-stabiliser tube (Z1) is connected with first resistance (R1) of dividing potential drop, the positive pole of second diode (D2) is connected with the positive pole of first voltage-stabiliser tube (Z1), and the negative pole of second voltage-stabiliser tube (Z2) is connected with the negative pole of second diode (D2), the plus earth of second voltage-stabiliser tube (Z2);
This serial regulating circuit is in parallel with control utmost point place circuit branch, makes control have stable level.
11. a PWM dc source control circuit is characterized in that: the input of this PWM dc source control circuit connects direct current, and its output is connected to the power input of led drive circuit;
PWM dc source control circuit is made up of semiconductor switch device and control circuit thereof, and this semiconductor switch device control circuit is connected with this semiconductor switch device, and semiconductor switch device is connected in the loop of led drive circuit;
The pwm signal of input PWM dc source control circuit makes led drive circuit according to pwm signal driving LED lamp by the Kai Heguan of the control circuit control semiconductor switch device of semiconductor switch device.
12. PWM dc source control circuit according to claim 11 is characterized in that: described semiconductor switch device is an at least a switching tube in MOS switching tube, triode or the reverse-blocking tetrode thyristor; Perhaps
Described PWM dc source control circuit is provided with four multiplexing pins, i.e. first pin, second pin, three-prong and the 4th pin; Wherein, first pin is the power supply input of PWM controller, and second pin is multiplexing pwm signal input, and three-prong is first ground connection, and the 4th pin is second ground connection; Perhaps
Described serial regulating circuit two ends are parallel with filter capacitor, and perhaps described mu balanced circuit two ends are parallel with filter capacitor; Perhaps
Input at optocoupler is in series with current-limiting resistance.
13. PWM dc source control circuit according to claim 11, it is characterized in that: described semiconductor switch device comprises the control utmost point, and the control circuit of semiconductor switch device comprises the control utmost point mu balanced circuit and the triggering signal control circuit of semiconductor switch device;
The triggering signal control circuit connects control utmost point mu balanced circuit, and control utmost point mu balanced circuit is connected with the described control utmost point again;
Pwm signal sends the triggering signal control circuit to, controls the level of described control utmost point mu balanced circuit to the output of the control utmost point by the triggering signal control circuit.
14. PWM dc source control circuit according to claim 13 is characterized in that: comprise second port that connects external PWM signal on the described triggering signal control circuit.
15. PWM dc source control circuit according to claim 13, it is characterized in that: described PWM dc source control circuit also comprises the PWM controller, comprise first port that is connected with the PWM controller on the described trigger signal controller circuit, the PWM controller is connected with the trigger signal controller circuit by first port.
16. PWM dc source control circuit according to claim 15 is characterized in that: described first port is parallel with mu balanced circuit.
17. PWM dc source control circuit according to claim 14, it is characterized in that: described triggering signal control circuit comprises second optocoupler (U2), the input of second optocoupler (U2) connects described second port, its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point;
Be in series with the 3rd diode (D3) that makes the unidirectional conducting of pwm signal in the input loop of second optocoupler (U2).
18. PWM dc source control circuit according to claim 15, it is characterized in that: described triggering signal control circuit comprises first optocoupler (U1), the input of first optocoupler (U1) connects described first port, its output is connected with described control utmost point mu balanced circuit, and is connected to the described control utmost point.
19. according to claim 16,17 or 18 described PWM dc source control circuits, it is characterized in that: described control utmost point mu balanced circuit comprises first diode (D1) and divider resistance;
The positive pole of first diode (D1) is connected to galvanic positive pole, and its negative pole is connected in series with the described control utmost point, is in series with divider resistance between first diode (D1) and the control utmost point.
20. PWM dc source control circuit according to claim 16, it is characterized in that: described control utmost point mu balanced circuit comprises first resistance (R1) of first diode (D1), second diode (D2), first voltage-stabiliser tube (Z1), dividing potential drop and second resistance (R2) of current limliting, and the mu balanced circuit in parallel with described first port comprises second voltage-stabiliser tube (Z2);
The positive pole of first diode (D1) is connected to galvanic positive pole, and its negative pole connects first resistance (R1) of dividing potential drop, second resistance (R2) of first resistance (R1) the series connection current limliting of dividing potential drop, and second resistance (R2) of current limliting is connected to the described control utmost point;
First voltage-stabiliser tube (Z1), second diode (D2) and second voltage-stabiliser tube (Z2) are connected successively, form serial regulating circuit, and second resistance (R2) of this serial regulating circuit and current limliting also connects, and is connected in series with first resistance (R1) of dividing potential drop; Wherein, first voltage-stabiliser tube (Z1) is connected with first resistance (R1) of dividing potential drop, the positive pole of second diode (D2) is connected with the positive pole of first voltage-stabiliser tube (Z1), and the negative pole of second voltage-stabiliser tube (Z2) is connected with the negative pole of second diode (D2), the plus earth of second voltage-stabiliser tube (Z2);
This serial regulating circuit is in parallel with control utmost point place circuit branch, makes control have stable level.
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| CN2010101716862A CN101813260B (en) | 2010-05-13 | 2010-05-13 | LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit |
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Cited By (5)
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| CN102330946A (en) * | 2011-07-20 | 2012-01-25 | 苏州晶雷光电照明科技有限公司 | Controllable serial LED (Light-Emitting Diode) color-changing lamp |
| CN102900964A (en) * | 2011-07-27 | 2013-01-30 | 鸿富锦精密工业（深圳）有限公司 | Light emitting diode light source device |
| WO2015131383A1 (en) * | 2014-03-07 | 2015-09-11 | 东莞高仪电子科技有限公司 | Universal led child-mother lamp |
| CN109041350A (en) * | 2018-09-06 | 2018-12-18 | 上海斯望照明科技有限公司 | A kind of DC power control method |
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| CN201726566U (en) * | 2010-05-13 | 2011-01-26 | 江西省晶和照明有限公司 | Led lamp device |
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| CN102278624A (en) * | 2011-05-17 | 2011-12-14 | 南京安达泰星电子有限公司 | LED (light-emitting diode) light source for module type constant current source and module type LED lightening unit |
| CN102330946A (en) * | 2011-07-20 | 2012-01-25 | 苏州晶雷光电照明科技有限公司 | Controllable serial LED (Light-Emitting Diode) color-changing lamp |
| CN102900964A (en) * | 2011-07-27 | 2013-01-30 | 鸿富锦精密工业（深圳）有限公司 | Light emitting diode light source device |
| WO2015131383A1 (en) * | 2014-03-07 | 2015-09-11 | 东莞高仪电子科技有限公司 | Universal led child-mother lamp |
| CN109041350A (en) * | 2018-09-06 | 2018-12-18 | 上海斯望照明科技有限公司 | A kind of DC power control method |
| CN109041350B (en) * | 2018-09-06 | 2021-03-05 | 上海斯望照明科技有限公司 | Direct-current power supply control method |
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