CN109548223A - For driving the driving device and lighting device of multiple luminous load chains - Google Patents
For driving the driving device and lighting device of multiple luminous load chains Download PDFInfo
- Publication number
- CN109548223A CN109548223A CN201710868682.1A CN201710868682A CN109548223A CN 109548223 A CN109548223 A CN 109548223A CN 201710868682 A CN201710868682 A CN 201710868682A CN 109548223 A CN109548223 A CN 109548223A
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- CN
- China
- Prior art keywords
- luminous load
- load chain
- driving device
- controller
- chain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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]
-
- 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
Abstract
The present invention relates to a kind of for driving the driving device and lighting device of multiple luminous load chains, wherein driving device includes: converter, with each luminous load chain link in multiple luminous load chains, for reception and conversion electric power voltage, and export the output electric current for being used for multiple luminous load chains；And each luminous load chain link in controller, with multiple luminous load chains, the ratio for controlling the input current provided to each luminous load chain and output electric current are matched with the estimated rate for distributing to each luminous load chain respectively.
Description
Technical field
The driving device that the present invention relates to a kind of for driving multiple luminous load chains and including the photograph of the driving device
Bright device.
Background technique
In order to enable same lighting device can be applied to may require that the illumination in a variety of different application environments
Device can generate the light of different colour temperature or different colors according to a variety of different application environments, so as to
In the case where the light source or optical component that do not need replacement lighting device, saves the manufacturing cost of lighting device and extend photograph
The application range of bright device.Multi-channel DC is often used in the application of the lighting device of this adjustable color temperature or color-adjustable
Driver, such as LED light device.In the prior art, in order to realize the driving device of multichannel, switching molding can be used
Multiple switch component is perhaps arranged in each channel or is believed using closed-loop control the electric current in each channel for formula power supply
Sampling number is carried out for subsequent adjusting.The multichannel driving device of the prior art is also possible to require the working frequency in channel and drive
The switching frequency of the converter of dynamic device is synchronous.In addition, being usually provided with multiple changes in traditional multi-channel DC driver
Parallel operation, multiple converters respectively correspond multiple direct current channels.However, the driver designed according to the prior art and obtaining in turn
Not only expensive but also device size is big for the lighting device obtained.
Summary of the invention
The present invention provides a kind of novel for driving the driving device of multiple luminous load chains and including the driving
The lighting device of device.Driving device according to the present invention supports the application of direct current multi-channel, and structure is simple, at low cost
It is honest and clean, subsequent adjusting is used for without using special parameter in each channel of closed-loop control active sensing.
One of purpose of the invention is come in fact in this way by a kind of driving device for driving multiple luminous load chains
Existing, wherein the driving device includes: converter, and each luminous load chain link in multiple luminous load chains, for receiving
With conversion electric power voltage, and export be used for multiple luminous load chains output electric current；And controller, with multiple luminous loads
Each luminous load chain link in chain, for controlling the input current provided to each luminous load chain and the ratio for exporting electric current
Rate is matched with the estimated rate for distributing to each luminous load chain respectively.Driving device structure according to the present invention is simple, and
The input current in each channel can be modulated, the input current in each channel is controlled using identical driving device
So that the summation of the illuminating effect of the luminous load chain in multiple channels meets expected illuminating effect.To without changing
In the case where load and driving device, the illumination with different colour temperature or color can be realized using identical driving device and imitate
Fruit.
Preferred embodiment in accordance with the present invention, each luminous load chain includes: switch unit and luminescence unit, wherein is opened
Unit is closed for switching luminescence unit；Controller is also used to control switch unit.Switch unit can be believed according to the control of controller
Number switch, to adjust the electric current for the luminous load chain for flowing through each channel and shine as caused by the luminous load chain in each channel
Obvious results fruit.
Further preferred embodiments according to the present invention, each luminous load chain in multiple luminous load chains is corresponding to be opened
It closes mutually indepedent between unit.Controller can simultaneously or consecutively issue control signal to multiple channels, be flowed through often with adjusting
The electric current in a channel.Control of the controller to another channel will not influence to the control in one of channel in multiple channels
System.In other words, when adjusting one of channel, another channel can according to the control signal conduction of controller or
Cut-off, and when one of channel is broken down, the failure that other channels not will receive the channel influence and can be after
It is continuous to operate normally.In this case, the remaining channel that can be operated normally can be enough to compensate hair according to control signal offer
The illuminating effect in the channel of raw failure.
Further preferred embodiments according to the present invention, controller are provided to the switch unit of each luminous load chain respectively
Pulse-width modulation control signal, wherein pulse-width modulation control signal is for adjusting estimated rate.It is provided to multiple luminous load chains
Pulse-width modulation control signal is respectively provided with different duty ratios, this makes multiple luminous load chains be respectively provided with different conducting controls
System, and it can be superimposed illuminating effect caused by each luminous load chain, to obtain the integral illumination effect of final lighting device
Fruit.
Further preferred embodiments according to the present invention, switch unit include: transistor, first resistor device, second resistance
Device and first diode；And luminescence unit includes: capacitor, light emitting diode and the second diode；Wherein, the one or two pole
The cathode of pipe is connected to the coordination electrode of transistor by first resistor device, and one end of second resistor is connected to first resistor device
On node between coordination electrode, and the other end is connected to the anode of first diode, and the cathode of the second diode
The working electrode of transistor is connected to by capacitor, light emitting diode is connected to the both ends of capacitor.Each luminous load chain
It can only include a switch member, a reverse current protection diode, an output capacitor and a light emitting diode, wherein opening the light
Part is controlled by the pulse-width modulation control signal that controller provides, i.e., for example opens when controlling signal is in the cycle high ordinary mail
Part is closed to be opened with conductive current path；When controlling signal is in the cycle low level signal, switch member is turned off to end
Current path.This make each luminous load chain have extremely simple and low-cost construction, and can reduce in turn including
The cost and size of the lighting device of driving device and multiple luminous load chains.
Preferred embodiment in accordance with the present invention, controller are also used to control the input current by each luminous load chain
Summation is equal to output electric current.Part in multiple luminous load chains or whole luminous load chains are selectively connected in controller,
And so that the summation of the duty ratio of the pulse-width signal for controlling each luminous load chain is 100%.
Preferred embodiment in accordance with the present invention, controller is also used to control only is connected its in multiple luminous load chains every time
In a luminous load chain.In this case, when one of luminous load chain conducting of multiple luminous load chains,
His luminous load chain can be all closed, which ensure that always output electric current is assigned in a controlled manner in each load bearing chain.
Preferred embodiment in accordance with the present invention, controller be also used to control in multiple luminous load chains at least two shine
The turn-on time section of load bearing chain is overlapped, is same or different.Multiple luminous load chains can simultaneously turn on or end simultaneously, i.e., at it
In a luminous load chain on or off when, other luminous load chains all on or off.As a result, by multiple hairs
The final illuminating effect that light load bearing chain is formed depends on all luminous load chains.It is formed as a result, by multiple luminous load chains
Final illuminating effect depends on the luminous load chain of part.
Preferred embodiment in accordance with the present invention, controller are also used to control at least one of multiple luminous load chains and shine
The original state of load bearing chain is conducting.This more particularly to protect circuit, and will not when starting because without load and
Cause over-voltage.
Preferred embodiment in accordance with the present invention, each luminous load chain have different colour temperatures or each other by different colours
Illuminating part composition.One of luminous load chain of multiple luminous load chains can provide minimum colour temperature, and another is sent out
Light load bearing chain can provide highest colour temperature.Multiple luminous load chains can be respectively provided with for example red, green, blue or white
LED chip.
Preferred embodiment in accordance with the present invention, driving device further include: intermediate circuit unit, be connected to converter with it is multiple
Between luminous load chain.Intermediate circuit unit may be, for example, the small capacitor of capacitance, so that the voltage of capacitor can be with more
The voltage of a luminous load chain rapidly changes, and can also reduce the mistake that electric current distributes in load bearing chain.
Preferred embodiment in accordance with the present invention, the frequency that controller is also used to control pulse-width modulation control signal are less than transformation
The switching frequency of device and be greater than supply frequency.The frequency of pulse-width modulation control signal should be selected as avoiding as far as possible with it is defeated
Other frequencies of electric current are interfered out, such as the switching frequency of supply frequency and converter.
Another object of the present invention in this way realize by a kind of lighting device, and wherein the lighting device includes the above institute
The driving device of description.Illuminator structure according to the present invention is simple and low in cost, which can be not required to
Change the control for being supplied to each luminous load chain according to specific application in the case where replacing driving device or light source
Signal processed, to provide the illumination for meeting concrete application requires, different-colour or color.
Detailed description of the invention
Attached drawing forms part of this specification, and is used to help further understand the present invention.These attached drawings illustrate this hair
Bright embodiment, and be used to illustrate the principle of the present invention together with specification.The identical label of identical component in the accompanying drawings
It indicates.It is shown in figure:
Fig. 1 shows the structural schematic diagram of driving device according to an embodiment of the present invention；
Fig. 2 shows the electrical block diagrams of lighting device according to an embodiment of the present invention；
Fig. 3 shows the schematic diagram of the pulse-width signal in multiple periods of driving device according to an embodiment of the present invention；
Fig. 4 shows a kind of implementation of the pulse-width signal in the signal period of driving device according to an embodiment of the present invention
The schematic diagram of mode；
The another kind that Fig. 5 shows the pulse-width signal in the signal period of driving device according to an embodiment of the present invention is real
Apply the schematic diagram of mode.
Specific embodiment
Fig. 1 shows the structural schematic diagram of driving device 100 according to an embodiment of the present invention.Driving device according to the present invention
100 include: converter 2, is connect with each luminous load chain 1 in multiple luminous load chains 1, for receiving and conversion electric power electricity
Us is pressed, and exports the output electric current Io for being used for multiple luminous load chains 1；And in controller 3, with multiple luminous load chains 1
Each luminous load chain 1 connection, for control to each luminous load chain 1 offer input current IIAnd export the ratio of electric current
Rate is matched with the estimated rate for distributing to each luminous load chain 1 respectively.
For example, it is buck converter or flyback transformer that converter 2 is implementable, and then by the chokes of buck converter
The secondary coil of circle or flyback transformer provides the output electric current for being used for multiple luminous load chains 1.Controller 3 is implementable to be
PDM keyer 3 to provide to multiple luminous load chains 1 there is the pulsewidth modulation (PWM) of different duty to control signal.
Each luminous load chain 1 may include one or more LED illuminating part, and the direct current that LED illuminating part is provided by converter 2
Stream power supply.The LED illuminating part of each luminous load chain 1 is according to the duty ratio on or off of pulse-width signal, to make
Obtain the input current I of each luminous load chain 1IMeet expected requirement with the ratio of output electric current Io.Utilize identical driving
Device is to the input current I in each channelIIt is controlled such that the total of the illuminating effect of the luminous load chain in multiple channels
With meet expected illuminating effect.To utilize identical driving device without changing load and driving device
The illuminating effect with different colour temperature or color can be realized.
The frequency that controller 3 is also used to control pulse-width modulation control signal is less than the switching frequency of converter 2 and is greater than
Supply frequency.The frequency of pulse-width modulation control signal should be selected as avoiding as far as possible occurring with other frequencies of output electric current
Interference, such as interfered with the switching frequency of supply frequency and converter 2.For example, when supply frequency is 100Hz, inverse-excitation type
When the switching frequency of converter is 33-120k Hz, in this case, the frequency for the pulse-width signal that controller 3 provides can
For example, 2-4k Hz.
Fig. 2 shows the electrical block diagrams of lighting device according to an embodiment of the present invention.The converter 2 of driving device mentions
For the DC current of the lighting load for lighting device.Lighting device further includes being connected to converter 2 and multiple luminous loads
Intermediate circuit unit between chain, wherein the intermediate circuit unit is embodied as the capacitor with predetermined capacitance, and capacitor
It is used as the output capacitor of lighting device.In the design of the output capacitor of general LED driver, output capacitor is answered
When the high ripple with big capacitance to avoid LED module, and LED module should be connected to output capacitor always.So
And in the present invention, different from general design, the capacitance of the capacitor of driving device is small and is designed so that capacitor
The voltage of device can rapidly change with the voltage of multiple luminous load chains, this divides more particularly to reduce electric current in multiple load bearing chains
The mistake matched.In the case where two channels of the embodiment shown according to fig. 2, in the electricity of the capacitor C0 of intermediate circuit unit
Pressure is increased to before overpressure level, at least one channel in two channels should be begun to turn on, especially in the wink of starting etc.
When situation in.
Multiple luminous load chains according to the present invention can be implemented with identical or different circuit structure, or
Person is only different from same or different LED illuminating part.In embodiments of the present invention, schematically illustrating two has phase
The luminous load chain of same circuit mechanism, wherein the difference of the two luminous load chains can for example be only that LED illuminating part.At this
In embodiment, first luminous load chain on the left of Fig. 2 includes switch unit 11 and luminescence unit 12, wherein switch unit
11 include: transistor, first resistor device R1, second resistor R2 and first diode D1；And luminescence unit 12 includes: electricity
Container, light emitting diode and the second diode D2.The cathode of first diode D1 is connected to transistor by first resistor device R1
Coordination electrode, one end of second resistor R2 is connected on the node between first resistor device R1 and coordination electrode, Er Qieling
One end is connected to the anode of first diode D1, and the cathode of the second diode D2 is connected to the work of transistor by capacitor
Make electrode, light emitting diode is connected to the both ends of capacitor.It is connected at the anode of first diode D1 for inputting pulsewidth
The input terminal of modulated signal, wherein transistor is according to the pulse-width signal on or off of input terminal, so that electric current
It flows through light emitting diode or prevents electric current from flowing through light emitting diode.In the present embodiment, second on the right side of Fig. 2
Luminous load chain has circuit structure identical with first luminous load chain.
Especially distinguish in the switch unit of the switch unit 11 of first luminous load chain and second luminous load chain
It is provided with resistor and diode, i.e., the switch unit 11 of first luminous load chain includes first resistor device R1, second resistance
Device R2 and first diode D1, the switch unit of second luminous load chain include 3rd resistor device R3, the 4th resistor R4
With third diode D3.Such preferred design especially enables the turn-on time of the switch unit in two channels to be overlapped, example
It is such as overlapped shown by 1 μ s, Fig. 5 as described below.
One switch can be only set in the channel of each luminous load chain, which is used to determine the LED in the channel
Whether illuminating part is connected to the output capacitor of intermediate circuit unit.Moreover, multiple channels are controlled such that for each logical
The summation of the duty ratio in road is 1, and only one channel is connect with the output capacitor of intermediate circuit unit every time.To,
The average current in each channel determines by total output electric current that its corresponding duty ratio and driving device provide, i.e. the electricity in the channel
Stream is equal to middle output electric current multiplied by the duty ratio for the channel.
In addition, for example, converter 2 is implemented with the flyback transformer of 100k Hz output electric current, power supply electricity
Stream can pass through the second diode D2, the first capacitor device C1, the first Light-emitting diode LED 1 and first of first luminous load chain
Transistor T1 or source current can be by the 4th diode D4 of second luminous load chain, the second capacitor C2, the second hairs
Optical diode LED2 and second transistor T2.In other words, the conducting situation depending on two channels, source current can flow through
One channel or second channel.It is in parallel with the capacitor C0 of intermediate circuit unit in first capacitor device C1 or the second capacitor C2
When, first capacitor device C1 and the second capacitor C2 play the work of main capacitor relative to the capacitor C0 of intermediate circuit unit
With.First capacitor device C1 and the second capacitor C2 can be answered according to the Topology Structure Design of driving device, such as in single-stage inverse-excitation type
It is designed as 470 μ F in, is designed as 330nF in the step-down applications of the second level.
Fig. 3 shows the schematic diagram of the pulse-width signal in multiple periods of driving device according to an embodiment of the present invention.
Two pulse-width signals in Fig. 3 are respectively provided with different duty ratios, and the summation of the two accountings is 1.According to the first arteries and veins
Wide modulated signal PWM1, the ratio for the output electric current that the input current and converter of the first luminous load chain provide are matched with predetermined
Ratio.According to the second pulse-width signal PWM2, the output electric current of the input current and converter of the second luminous load chain
Ratio is matched with scheduled ratio.Moreover, it is also apparent that the polarity of two signals is exactly the opposite, i.e., from Fig. 3
When one pulse-width signal PWM1 is high level, the second pulse-width signal PWM2 is low level or the first pulsewidth tune
When signal PWM1 processed is low level, the second pulse-width signal PWM2 is high level.
Fig. 4 shows the one of which of the pulse-width signal in the signal period of driving device according to an embodiment of the present invention
The schematic diagram of embodiment.In Fig. 4, in signal period, begun to change into the first pulse-width signal PWM1 from high level
When low level, the second pulse-width signal PWM2 immediately begins to become high level from low level.In this case, two
The turn-on time in channel is not overlapped.
The another kind that Fig. 5 shows the pulse-width signal in the signal period of driving device according to an embodiment of the present invention is real
Apply the schematic diagram of mode.In Fig. 5, in signal period, the first pulse-width signal PWM1 becomes low level warp from high level
The time gone through is longer, during this period of time, i.e., before the first pulse-width signal PWM1 becomes low level not yet, the second arteries and veins
Wide modulated signal PWM2 becomes high level from low level.In this case, the turn-on time in two channels has overlapping, overlapping
Time can be changed according to the hardware design and concrete application demand of the switch unit in each channel.In addition, for example,
In the unshowned embodiment of attached drawing, the turn-on time in two channels can be completely overlapped, i.e., the turn-on time section phase in two channels
Together.In this case, the on and off time in two channels is identical, that is, opens simultaneously and simultaneously close off.Therefore, illumination dress
The luminous intensity and colour temperature set are the luminous intensity and colour temperature depending on the two channels.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.It is done within the spirit and principles of the present invention it is any modification, etc.
With replacement, improvement etc., should all be included in the protection scope of the present invention.
Reference label
1 luminous load chain
2 converters
3 controllers
100 driving devices
200 lighting devices
Us supply voltage
IOExport electric current
IIInput current
11 switch units
12 luminescence units
T1 the first transistor
T2 second transistor
R1 first resistor device
R2 second resistor
R3 3rd resistor device
The 4th resistor of R4
D1 first diode
The second diode of D2
D3 third diode
The 4th diode of D4
C1 first capacitor device
The second capacitor of C2
Co intermediate circuit unit
The first light emitting diode of LED1
The second light emitting diode of LED2
The first pulse-width signal of PWM1
The second pulse-width signal of PWM2.
Claims (13)
1. one kind is for driving the driving device (100) of multiple luminous load chains (1), which is characterized in that the driving device
(100) include:
Each luminous load chain link in converter (2), with the multiple luminous load chain (1), for receiving and converting electricity
Source voltage (Us), and the output electric current (Io) for being used for the multiple luminous load chain (1) is provided；And
Each luminous load chain link in controller (3), with the multiple luminous load chain (1), for controlling to institute
State the input current (I that each luminous load chain providesI) be matched with respectively with the ratio for exporting electric current (Io) and distribute to institute
State the estimated rate of each luminous load chain.
2. driving device (100) according to claim 1, which is characterized in that
Each luminous load chain includes: switch unit (11) and luminescence unit (12), wherein the switch unit (11) is used
In the switch luminescence unit (12)；
The controller (3) is also used to control the switch unit (11).
3. driving device (100) according to claim 2, which is characterized in that described in the multiple luminous load chain
It is mutually indepedent between the corresponding switch unit of each luminous load chain.
4. driving device (100) according to claim 2, which is characterized in that the controller (3) is respectively to described each
The switch unit (11) of luminous load chain provides pulse-width modulation control signal, wherein the pulse-width modulation control signal is for adjusting
The whole estimated rate.
5. driving device (100) according to claim 2, which is characterized in that
The switch unit (11) includes: transistor, first resistor device, second resistor and first diode；And
The luminescence unit (12) includes: capacitor, light emitting diode and the second diode；
Wherein, the cathode of the first diode is connected to the coordination electrode of the transistor by first resistor device, and described
One end of two resistors is connected on the node between the first resistor device and the coordination electrode, and the other end is connected to
The anode of the first diode, and the cathode of second diode is connected to the transistor by the capacitor
Working electrode, the light emitting diode are connected to the both ends of the capacitor.
6. driving device (100) according to any one of claim 1 to 5, which is characterized in that the controller (3) is also
For controlling the input current (I by each luminous load chainI) summation be equal to the output electric current (Io).
7. driving device (100) according to any one of claim 1 to 5, which is characterized in that the controller (3) is also
For controlling the one of luminous load chain be only connected in the multiple luminous load chain (1) every time.
8. driving device (100) according to any one of claim 1 to 5, which is characterized in that the controller (3) is also
Turn-on time section for controlling at least two luminous load chains in the multiple luminous load chain (1) partly overlaps, is identical
Or it is different.
9. driving device (100) according to any one of claim 1 to 5, which is characterized in that the controller (3) is also
For controlling the original state of at least one luminous load chain in the multiple luminous load chain (1) as conducting.
10. driving device (100) according to any one of claim 1 to 5, which is characterized in that the multiple shine is born
Chain is carried to be respectively provided with different colour temperatures or be made of the illuminating part of different colours.
11. driving device (100) according to any one of claim 1 to 5, which is characterized in that the driving device
(100) further include:
Intermediate circuit unit is connected between the converter (2) and the multiple luminous load chain (1).
12. driving device (100) according to any one of claim 1 to 5, which is characterized in that the controller (3) is also
Frequency for controlling the pulse-width modulation control signal is less than the switching frequency of the converter (2) and is greater than power supply frequency
Rate.
13. a kind of lighting device (200), which is characterized in that filled including driving described according to claim 1 any one of -12
Set (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710868682.1A CN109548223A (en) | 2017-09-22 | 2017-09-22 | For driving the driving device and lighting device of multiple luminous load chains |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710868682.1A CN109548223A (en) | 2017-09-22 | 2017-09-22 | For driving the driving device and lighting device of multiple luminous load chains |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109548223A true CN109548223A (en) | 2019-03-29 |
Family
ID=65830579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710868682.1A Pending CN109548223A (en) | 2017-09-22 | 2017-09-22 | For driving the driving device and lighting device of multiple luminous load chains |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109548223A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050225264A1 (en) * | 2004-03-30 | 2005-10-13 | Kemp William H | LED lamp with color and brightness controller for use in wet, electrically hazardous bathing environments |
| US20080116818A1 (en) * | 2006-11-21 | 2008-05-22 | Exclara Inc. | Time division modulation with average current regulation for independent control of arrays of light emitting diodes |
| CN202019476U (en) * | 2010-12-29 | 2011-10-26 | 笙泉科技股份有限公司 | Alternating current to direct current multi-channel load control device and lighting device thereof |
| CN102651939A (en) * | 2011-02-28 | 2012-08-29 | Nxp股份有限公司 | Electrical load driving circuit |
| US20160255687A1 (en) * | 2013-11-25 | 2016-09-01 | Koninklijke Philips N.V. | A method of controlling a lighting arrangement, a lighting controller and a lighting system |
-
2017
- 2017-09-22 CN CN201710868682.1A patent/CN109548223A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050225264A1 (en) * | 2004-03-30 | 2005-10-13 | Kemp William H | LED lamp with color and brightness controller for use in wet, electrically hazardous bathing environments |
| US20080116818A1 (en) * | 2006-11-21 | 2008-05-22 | Exclara Inc. | Time division modulation with average current regulation for independent control of arrays of light emitting diodes |
| CN202019476U (en) * | 2010-12-29 | 2011-10-26 | 笙泉科技股份有限公司 | Alternating current to direct current multi-channel load control device and lighting device thereof |
| CN102651939A (en) * | 2011-02-28 | 2012-08-29 | Nxp股份有限公司 | Electrical load driving circuit |
| US20160255687A1 (en) * | 2013-11-25 | 2016-09-01 | Koninklijke Philips N.V. | A method of controlling a lighting arrangement, a lighting controller and a lighting system |
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Effective date of registration: 20230420 Address after: Munich, Germany Applicant after: Optoelectronics Co.,Ltd. Address before: Munich, Germany Applicant before: OSRAM GmbH |