CN104411042B - Led drive device - Google Patents
Led drive device Download PDFInfo
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- CN104411042B CN104411042B CN201410663628.XA CN201410663628A CN104411042B CN 104411042 B CN104411042 B CN 104411042B CN 201410663628 A CN201410663628 A CN 201410663628A CN 104411042 B CN104411042 B CN 104411042B
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- 230000005611 electricity Effects 0.000 claims description 13
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- 238000001514 detection method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 241001274660 Modulus Species 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 101150090280 MOS1 gene Proteins 0.000 description 5
- 101100401568 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) MIC10 gene Proteins 0.000 description 5
- 230000006870 function Effects 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 4
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- 238000004804 winding Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 206010021703 Indifference Diseases 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
Abstract
The invention discloses a kind of LED drive device, including the input filter module (1) being sequentially connected, bridge rectifier module (2), DC modular converters (3), tunable optical drive module (4) and LED light source module (5), also include wireless communication module (6), the wireless communication module (6) exports different PWM ripples to the Enable Pin of the tunable optical drive module (4), and the tunable optical drive module (4) adjusts the electric current for flowing through the LED light source module (5) according to the PWM ripples.The LED drive device efficiency high of the present invention, low cost.
Description
Technical field
The present invention relates to a kind of drive device, particularly a kind of LED drive device.
Background technology
LED illumination uses constant current drive mode substantially in the prior art.In order to preferably play the excellent of LED illumination energy-conservation
Point, it is trend of the times to add dimming function in LED driver.Generally, the dimming mode of LED driver has 3 kinds：Thyristor regulating
Light, simulation light modulation, PWM light modulations.Every kind of dimming mode has its advantage and limitation.PWM light modulations are to make on-off circuit with relative
Sufficiently high frequency work, changes output current average value by setting cycle and dutycycle for eye recognition ability,
Its output current only has two states：Maximum rated operating current and zero current.Simulation light modulation is by changing output current
Amplitude realizes dimming function, and thyristor regulating just realizes dimming function by the power output of regulation power supply.PWM light modulations can
To ensure LED color temperature constant, the efficiency of driver is higher, and can carry out precise control, but it has the disadvantage to need MCU to control
Device processed, it is with high costs.The relative PWM light adjusting circuits of simulation light modulation are simple, easily realize, but LED colour temperatures can be made to change, simultaneously
Efficiency is low, output current precision is difficult regulation, dimming scope is limited.Thyristor regulating just utilizes existing controllable silicon dimmer,
By changing the angle of flow of controllable silicon, adjust power output to realize light modulation, its advantage is without changing original fluorescent lamp light modulation
Equipment, but shortcoming is more serious：It can seriously reduce drive efficiency and power factor, while can also make LED produce flicker.
The content of the invention
For the defect of prior art, the invention provides a kind of LED drive device.
A kind of LED drive device, including be sequentially connected input filter module 1, bridge rectifier module 2, DC modular converters
3rd, tunable optical drive module 4 and LED light source module 5, also including wireless communication module 6, the wireless communication module 6 is exported not
Same PWM ripples are to the Enable Pin of the tunable optical drive module 4, and the tunable optical drive module 4 is adjusted according to the PWM ripples to flow
Electric current through the LED light source module 5.
Optionally, also wrap and flow through the detection module of the electric current of LED light source module 5 for detecting, the detection module with
LED light source detection module 5 is connected, the electricity that the tunable optical drive module 4 is detected according to the PWM ripples and the detection module
Stream, regulation flows through the electric current of the LED light source module 5.
Optionally, the wireless communication module 6 receives host computer with distal end host computer by ZigBee wireless communication connections
Control instruction, adjusted according to the instruction and flow through the electric current of the LED light source module 5.
Optionally, the input filter module 1 is by the inductance L1 being connected in electric power incoming line, electric capacity C1, inductance L2 and electricity
Hold C2 compositions, electric capacity C1, C2 are connected across on electric power incoming line, and inductance L1, L2 are connected between electric capacity C1, C2, form the filtering of II shapes
Module 1.
Optionally, the input of the DC modular converters 3 constitutes resitstance voltage divider to input voltage by resistance R9 and R10
Sampled, the output end of DC modular converters 3 constitutes resitstance voltage divider by resistance R7 and R8 and output voltage is sampled, DC
Input voltage and output voltage that conversion chip is obtained according to sampling, the output of regulation DC modular converters 3.
Optionally, the DC modular converters 3 include APFC circuits, and the APFC circuits include being connected between dc bus
Switching tube and output capacitance, booster diode are serially connected with the dc bus between switching tube and boost capacitor.
Optionally, the tunable optical drive module 4 includes driving chip, driving half-bridge and filter circuit, driving chip
Output end connection driving half-bridge, the filtered circuit of driving half-bridge connects the LED light source module 5.
Optionally, the tunable optical drive module 4 includes driving chip, the two ends of the LED light source module 5 be parallel with by
The bleeder circuit that resistance Rov1 and resistance Rov2 are composed in series, resistance Rov1 and resistance Rov2 tie point by electric capacity CEN and
The enable pin connection of voltage-regulator diode Dov and driving chip, the PWM output ends of the wireless communication module 6 are also connected to driving
The enable pin of chip.
Optionally, the tunable optical drive module 4 has upper limit threshold voltage and lower limit threshold voltage, when adjustable optical drive
When the input voltage of module 4 is more than upper limit threshold voltage, the tunable optical drive module 4 enters disabled state, stops to LED light
Source module 5 provides electric current；When the input voltage of tunable optical drive module 4 is less than lower limit threshold voltage, the tunable optical drive module 4
Into normal mode of operation.
The beneficial effects of the invention are as follows：The non-pole light regulating control of light fixture is realized using PWM mode, with power factor it is high,
Efficiency high, low cost and other advantages.
Brief description of the drawings
Fig. 1 is the structural representation of drive device of the present invention；
Fig. 2 is the circuit structure diagram of part of module of the present invention；
Fig. 3 is the circuit structure diagram of tunable optical drive module of the present invention；
Fig. 4 is the circuit structure diagram of wireless communication module of the present invention.
Embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail, make the above and other purpose of the present invention, feature and advantage will become apparent from.Complete
Identical reference indicates identical part in portion's accompanying drawing.Not deliberately accompanying drawing drawn to scale, it is preferred that emphasis is show this hair
Bright purport.
Referring to Fig. 1, the LED drive device of the present invention includes input filter module 1, bridge rectifier module 2, DC moduluss of conversion
Block 3, tunable optical drive module 4, LED light source module 5 and wireless communication module 6, input filter module 1 use electromagnetic interface filter.
LED lamp power input 220Vac/50Hz civil power, by electromagnetic interface filter suppression module to the radiation interference of power network after, warp
AC is transformed to DC by bridge type rectification module 2, and the DC after conversion exports two-way direct current by DC modular converters 3, wherein giving all the way
Wireless communication module 6 is powered, and another road powers to tunable optical drive module 4；Wireless communication module 6 leads to using CC2530 as core
All LED lamp can be constituted one wireless control network by crossing wireless communication module 6, during each LED is network
One node, there is independent and unique network ID.Light fixture is received after brightness adjustment control order by CC2530 wireless modules, is passed through
Export different PWM to adjust the output current of tunable optical drive module 4, so as to realize the light modulation control to LED light source module 5
System.
Input filter module 1, bridge rectifier module 2, the particular circuit configurations of DC modular converters 3 are as shown in Fig. 2 civil power is logical
Input filter module 1 and the output ripple voltage of bridge rectifier module 2 are crossed, input filter module 1 is by being connected in electric power incoming line
Inductance L1, electric capacity C1, inductance L2 and electric capacity C2 compositions, electric capacity C1, C2 are connected across on electric power incoming line, and inductance L1, L2 are connected to electricity
Hold between C1, C2, thus form II shape EMI filtration modules, the radiation interference of power network can be carried out by the filtration module
Suppress.The output of filtration module 1 connects the input of rectification module 2, and rectification module uses H bridge rectification circuits, using controllable or not
Controlled rectification circuit, constitutes uncontrollable H bridges rectification module by 4 uncontrollable diodes in an embodiment of the present invention,
By rectification module 2 by AC rectification into direct current.Smoothing capacity C3 is connected between the positive and negative busbar that rectification module is exported,
The direct current that rectification is exported can be carried out by electric capacity smooth.The output connection DC modular converters 3 of rectification module 2, DC moduluss of conversion
Block 3 is using L6561 as core.The input of DC modular converters 3 constitutes resitstance voltage divider by resistance R9 and R10 and sampled, electricity
Resistance R9 and R10 is series between positive and negative dc bus, and IC1 3 pin are connected with R9, R10 tie point, and resitstance voltage divider is adopted
3 pin through IC1 are detected by its internal multiplier after sample；The output end of DC modular converters 3 constitutes resistance point by resistance R7 and R8
Depressor is sampled, and resistance R7 and R8 are series between positive and negative dc bus, and IC1 1 pin is connected with R7, R8 tie point, electricity
1 pin through IC1 is detected by its internal indifference amplifier after resistance divider is sampled.The present invention takes single-stage inverse-excitation type APFC electricity
Road, the APFC circuits of this mode work in electric current critical conduction mode of operation, the capacity very little of the input capacitance of APFC circuits
(i.e. exchange input commercial power rectification output filter capacitor capacity very little), thus APFC circuits input voltage maximum very close to
The peak value of output voltage after exchange input line voltage rectification.The power factor of the circuit is generally higher than 0.92, can be well
Meet the technical requirements about EMC and THD.Heavy duty application scenario is being exported, the circuit can obtain higher work effect
Rate, general work efficiency is close to 90%, and APFC power switch pipes MOSFET can be made by working in electric current critical conduction mode of operation
Conduction loss it is smaller, advantageously reduce the volume of radiator.APFC circuits include MOS1, diode D1 and electric capacity C7,
C7 two ends obtain VD, and boost inductance winding T1 is series on positive direct-current bus in DC modular converters 3, pass through boosting
Inductor winding T1 electric current, is sensed by its auxiliary winding, and 5 pin through IC1 are input to the zero current detector of inside.Switching tube MOS1
It is connected in series in resistance R6 between positive and negative dc bus, the electric current for flowing through switching tube MOS1 is converted to voltage signal on R6,
4 pin through IC1 are input to the current sensor of inside.The output of IC1 internal multipliers, determines the thresholding of IC14 pin.When IC1's
When PWM output drivings MOS1 on 7 pin is turned on, booster diode D1 cut-offs all flow through MOS1 by T1 electric current.Work as MOS
During cut-off, D1 conductings.The result that IC 1 is controlled, it is almost 180 ° to make the commutation diode angle of flow, AC input current continuous stream
It is dynamic, and moment tracking AC-input voltage transient change track, and same-phase is kept with AC-input voltage, in sinusoidal waveform,
Line power factor is brought up to more than 0.99.At the same time, PFC boost converter serves as high power factor switching.Hand over
Input voltage is flowed in 175~265V ranges, total energy output 400V burning voltage.
Fig. 3 is the circuit structure diagram of tunable optical drive module 4, and the output end of DC modular converters 3 connects adjustable optical drive mould
For core, electric capacity is connected between IRS2541 1 pin and 2 pin with IRS2541 (IC2) for the input of block 4, tunable optical drive module 4
Cvcc1, Cvcc1 with start resistance Rs1 series connection after be connected with positive direct-current bus, the output pin LO of tunable optical drive module 4 and
HO difference connecting valve M2, M1, M1 and M2 can use MOS switch pipe, and M1 and M2 are series between positive and negative dc bus, by M1 with
M2 composition driving half-bridges, the output end of half-bridge drive circuit is connected with LED light source module 5, and M1 and M2 tie point is in figure 3
The output end of half-bridge, its filter circuit being made up of inductance with electric capacity (inductance L1 and electric capacity Cout) connects with LED light source module 5
Connect.Circuit is charged by starting resistance Rs1 to the electric capacity Cvcc1 on IC2 pins VCC.When voltage is turned on more than VCC on Cvcc1
During thresholding, IC2 starts, and LO (5 pin) puts height, and HO (7 pin) is set low, and in being kept for one section of scheduled time, drives half-bridge low-end switch
M2 is turned on, and VCC voltages are then charged by bootstrap diode DBooT to electric capacity CBooT, is set up VBS suspended voltages and is supplied to high-pressure side
Electricity, when CBooT, which fills voltage with, reaches high-side driver turn-on threshold level inside IC2, IC2 starts triggering and exported according to regulation
The constant requirement of electric current, the high low states of HO and LO are controlled by output electric current measure feedback.Biasing on IC2 pins VCC is then
There is provided by output voltage Vout by resistance Rs2.LED light source module 5 is grounded by feedback voltage detection resistance RC5, resistance RC5
The other end be connected to by resistance Rf on IC2 pin IFB, when the feedback voltage V IFB on IC2 pins IFB is less than 0.5V
During thresholding, HO puts height, and LO is set low, then M1 is turned on, and half bridge output current absorbs electric current by LED, load from direct current line ball,
Outputting inductance L1 and electric capacity Cout storage energies, VIFB start increase, once VIFB is increased to more than 0.5V, control ring is in delay
After THO OFF, HO is turned off, then M1 ends, then after DT (Dead Time), LO is opened, M2 is then turned on, outputting inductance L1 and electricity
The energy storage held in Cout then discharges, and still has electric current to pass through in LED, and VIFB starts to reduce.And when VIFB is again decreased to 0.5V
When following, control ring opens HO after delay THO ON, then M1 is turned on, then after DT (Dead Time), LO shut-offs, M2 is then
Cut-off, so as to reach the purpose of stable average current.
Referring to Fig. 4, the one side of wireless communication module 6 has the ZigBee radio communication functions with host computer, the opposing party
Face can control drive module 4 to realize the PWM drivings to LED light source by exporting PWM ripples.Wireless communication module 6 with
CC2530 is core, and CC2530 is the real on-chip system applied for IEEE 802.15.4, ZigBee and RF4CE
(SoC) solution.It can set up powerful network node with low-down total material cost.CC2530 combines leading
RF transceivers premium properties, the enhanced 8051CPU of industrywide standard, In-System Programmable flash memory, 8-KB RAM and many
Other powerful functions.CC2530 has four kinds of different flash versions：CC2530F32/64/128/256, respectively with 32/64/
128/256KB flash memory.CC2530 has different operational modes so that the system that it especially adapts to super low-power consumption requirement.Fortune
Conversion time between row mode is short to further ensure that low energy expenditure.CC2530F256 combines the industry neck of Texas Instrument
There is provided a powerful and complete ZigBee solution for first golden unit Zigbee protocol stack (Z-StackTM).
The PWM output ends of wireless communication module 6 are connected with the control pin (enable pin) of tunable optical drive module, Fig. 3
The threshold voltage upper limit that middle IRS2541 chips (driving chip) enable pin ENN is VENNTH+, when ENN pin input voltages are super
When crossing VENNTH+, chip enters disabled state, and circuit stops providing electric current to load.Under input voltage is less than on pin ENN
During voltage limit VENNTH-, chip reenters normal mode of operation.Therefore circuit inputs a not Frequency on ENN pins
With the pulse signal of change dutycycle, then LED brightness PWM regulations can be realized.Specifically, the two of LED light source module 5
End is parallel with the bleeder circuit being composed in series by resistance Rov1 and Rov2, and Rov1 and Rov2 tie point is by electric capacity CEN and surely
The enable pin connection of diode Dov driving chips is pressed, the PWM output ends of wireless communication module 6 are also connected to making for driving chip
Can pin.Flow through and there is linear relationship between LED average currents and PWM duty cycle, PWM duty cycle is bigger, and light output is then smaller,
Brightness is also darker.Such as dutycycle is 20%, and LED light output is then the 80% of maximum.The chip of IRS2541 chips, which is enabled, to be drawn
Pin ENN threshold voltage is 2.5V or so, on the one hand avoids threshold voltage too low, external noise signals is caused chip forbidden energy；
On the other hand the output pwm signal for being adapted to microcontroller carries out enable control to chip.Outside PWM enables control signal frequency
Typically in several KHz, frequency is too low will to cause LED scintillations.The ENN of this circuit enables control signal by CC2530 wireless modules
There is provided.CC2530 module reception system dim signals, produce corresponding pwm pulse signal and are input to ENN pins, realize to driving
The enable control of circuit, and then regulation LED array electric current is realized, so as to realize the non-pole light regulating control of light fixture.
Many details are elaborated in the above description to fully understand the present invention.But above description is only
Presently preferred embodiments of the present invention, the invention can be embodied in many other ways as described herein, therefore this
Invention is not limited by specific implementation disclosed above.Any those skilled in the art are not departing from the technology of the present invention simultaneously
In the case of aspects, all make many possible to technical solution of the present invention using the methods and techniques content of the disclosure above
Change and modify, or be revised as the Equivalent embodiments of equivalent variations.Every content without departing from technical solution of the present invention, according to this
The technical spirit of invention still falls within skill of the present invention to any simple modification, equivalent variation and modification made for any of the above embodiments
In the range of the protection of art scheme.
Claims (6)
1. a kind of LED drive device, including be sequentially connected input filter module (1), bridge rectifier module (2), DC moduluss of conversion
Block (3), tunable optical drive module (4) and LED light source module (5), it is characterised in that described also including wireless communication module (6)
Wireless communication module (6) exports different PWM ripples to the Enable Pin of the tunable optical drive module (4), the adjustable optical drive
Module (4) adjusts the electric current for flowing through the LED light source module (5) according to the PWM ripples；
Also wrap the detection module that the LED light source module (5) electric current is flowed through for detection, the detection module and LED light source mould
Block (5) is connected, the electric current that the tunable optical drive module (4) detects according to the PWM ripples and the detection module, regulation stream
Electric current through the LED light source module (5)；
The input of the output end connection tunable optical drive module (4) of the DC modular converters (3), tunable optical drive module (4)
With IRS2541 (IC2) for core, electric capacity Cvcc1, Cvcc1 are connected between IRS2541 1 pin and 2 pin and is gone here and there with starting resistance Rs1
It is connected after connection with positive direct-current bus, the IRS2541 pin of output pin 5 and 7 pin difference connecting valve M2, M1, M1 and M2 use MOS
Switching tube, M1 and M2 are series between positive and negative dc bus, and driving half-bridge constitute by M1 and M2, the output end of half-bridge drive circuit and
LED light source module (5) is connected, and M1 and M2 tie point are the output end of half-bridge, and M1 and M2 tie point pass through outputting inductance L1
It is connected with the electric capacity Cout filter circuits constituted with LED light source module (5), by starting resistance Rs1 on IC2 pins VCC
Electric capacity Cvcc1 charges, when voltage is more than VCC turn-on thresholds on Cvcc1, and IC2 starts, and 5 pin put height, and 7 pin are set low, and in holding
One section of scheduled time, driving half-bridge low-end switch M2 conductings, VCC voltages are then filled by bootstrap diode DBooT to electric capacity CBooT
Electricity, sets up VBS suspended voltages and is powered to high-pressure side, and high-side driver turn-on threshold electricity inside IC2 is reached when CBooT fills voltage with
Usually, IC2 starts requirement of the triggering according to regulation constant output current, and 7 pin and 5 pin are controlled by output electric current measure feedback
Biasing on high low state, IC2 pins VCC is then provided by output voltage Vout by resistance Rs2, and LED light source module (5) passes through
Feedback voltage detection resistance RC5 is grounded, and the resistance RC5 other end is connected on IC2 pin IFB by resistance Rf, when IC2 draws
When feedback voltage V IFB on pin IFB is less than 0.5V thresholding, 7 pin put height, and 5 pin are set low, then M1 is turned on, and half bridge output current leads to
LED is crossed, load absorbs electric current, outputting inductance L1 and electric capacity Cout storage energies from direct current line ball, and VIFB starts increase, one
Denier VIFB is increased to more than 0.5V, and control ring turns off 7 pin after delay TH0OFF, then M1 ends, then through Dead Time DT it
Afterwards, 5 pin are opened, and M2 is then turned on, and the energy storage in outputting inductance L1 and electric capacity Cout then discharges, and still has electric current to pass through in LED, and
VIFB starts to reduce, and when VIFB is again decreased to below 0.5V, control ring opens 7 pin after delay TH0ON, then M1 is led
It is logical, then after Dead Time DT, 5 pin shut-off, M2 then ends, so as to reach the purpose of stable average current.
2. LED drive device according to claim 1, it is characterised in that the wireless communication module (6) and distal end are upper
Machine receives the control instruction of host computer by ZigBee wireless communication connections, and the LED light source mould is flowed through according to instruction regulation
The electric current of block (5).
3. LED drive device according to claim 1, it is characterised in that the input filter module (1) is by being connected to electricity
Inductance L1, electric capacity C1, inductance L2 and electric capacity C2 compositions in the inlet wire of source, electric capacity C1, C2 are connected across on electric power incoming line, inductance L1,
L2 is connected between electric capacity C1, C2, forms ∏ shapes filtration module (1).
4. LED drive device according to claim 1, it is characterised in that the input of the DC modular converters (3) passes through
Resistance R9 and R10 composition resitstance voltage dividers are sampled to input voltage, the output ends of DC modular converters (3) by resistance R7 and
R8 composition resitstance voltage dividers are sampled to output voltage, input voltage and output electricity that DC conversion chips are obtained according to sampling
Pressure, the output of regulation DC modular converters (3).
5. LED drive device according to claim 1, it is characterised in that the DC modular converters (3) include APFC electricity
Road, the APFC circuits include the switching tube and output capacitance being connected between dc bus, and booster diode is serially connected with switching tube
On dc bus between boost capacitor.
6. LED drive device according to claim 1, it is characterised in that the tunable optical drive module (4) includes driving
Chip I RS2541, the two ends of the LED light source module (5) are parallel with the partial pressure being composed in series by resistance Rov1 and resistance Rov2
Circuit, resistance Rov1 and resistance Rov2 tie point passes through electric capacity CEN's and voltage-regulator diode Dov and driving chip IRS2541
Enable pin is connected, and the PWM output ends of the wireless communication module (6) are also connected to driving chip IRS2541 enable pin.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710347160.7A CN106973463A (en) | 2014-11-19 | 2014-11-19 | The LED drive device high to the control of light fixture stepless dimming, power factor |
| CN201410663628.XA CN104411042B (en) | 2014-11-19 | 2014-11-19 | Led drive device |
| CN201710347003.6A CN107046750B (en) | 2014-11-19 | 2014-11-19 | Using PWM mode to the LED drive device of lamps and lanterns stepless dimming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663628.XA CN104411042B (en) | 2014-11-19 | 2014-11-19 | Led drive device |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710347160.7A Division CN106973463A (en) | 2014-11-19 | 2014-11-19 | The LED drive device high to the control of light fixture stepless dimming, power factor |
| CN201710347003.6A Division CN107046750B (en) | 2014-11-19 | 2014-11-19 | Using PWM mode to the LED drive device of lamps and lanterns stepless dimming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104411042A CN104411042A (en) | 2015-03-11 |
| CN104411042B true CN104411042B (en) | 2017-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410663628.XA Expired - Fee Related CN104411042B (en) | 2014-11-19 | 2014-11-19 | Led drive device |
| CN201710347003.6A Active CN107046750B (en) | 2014-11-19 | 2014-11-19 | Using PWM mode to the LED drive device of lamps and lanterns stepless dimming |
| CN201710347160.7A Pending CN106973463A (en) | 2014-11-19 | 2014-11-19 | The LED drive device high to the control of light fixture stepless dimming, power factor |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710347003.6A Active CN107046750B (en) | 2014-11-19 | 2014-11-19 | Using PWM mode to the LED drive device of lamps and lanterns stepless dimming |
| CN201710347160.7A Pending CN106973463A (en) | 2014-11-19 | 2014-11-19 | The LED drive device high to the control of light fixture stepless dimming, power factor |
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| TWI630606B (en) * | 2017-02-06 | 2018-07-21 | 群光電能科技股份有限公司 | Light emitting diode driving system and the burning method thereof |
| CN107197561B (en) * | 2017-06-12 | 2019-05-24 | 宜昌格志科技有限公司 | A kind of LED energy saving light modulator based on DC bus-bar voltage signal |
| CN107525437B (en) * | 2017-09-04 | 2019-05-24 | 中国航发南方工业有限公司 | The detection method of infrared target simulator and guided missile tracking ability |
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| CN108174480A (en) * | 2017-12-25 | 2018-06-15 | 嘉兴美斯克电气科技有限公司 | It is a kind of to sense and be remotely controlled dual-purpose light-adjustable LED lamp |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107046750A (en) | 2017-08-15 |
| CN107046750B (en) | 2018-11-09 |
| CN104411042A (en) | 2015-03-11 |
| CN106973463A (en) | 2017-07-21 |
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