CN105744679B - A kind of LED driver - Google Patents
A kind of LED driver Download PDFInfo
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- CN105744679B CN105744679B CN201610142864.6A CN201610142864A CN105744679B CN 105744679 B CN105744679 B CN 105744679B CN 201610142864 A CN201610142864 A CN 201610142864A CN 105744679 B CN105744679 B CN 105744679B
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- led driver
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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]
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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Abstract
The invention discloses a kind of LED drivers, are applied to a LED load circuit, including the current sample network being arranged in LED load circuit；The feed circuit that input terminal is connected to the network with current sample, output end is connect with the input terminal of the control circuit of multichannel respectively；The multi-channel control circuit that output end is connect with the control terminal of one-to-one main power circuit；Input terminal is connect with power supply, output end accesses the multichannel main power circuit in LED load circuit；It is connect respectively with the output end of every road main power circuit, and the health status detection circuit that the state of the output end according to every road main power circuit accordingly prompts the service life state of LED driver.LED driver provided by the invention in real time can prompt accordingly the service life state of LED driver according to the state of the output end of main power circuit, allow users to the service life for timely understanding LED driver, and then can take precautions against and replace in time.
Description
Technical field
The present invention relates to Drive technology fields, more particularly to a kind of LED driver.
Background technique
The advantages that LED light is long with its service life, light efficiency is high, environmentally protective is applied to more and more occasions.Due to LED light
Service life itself, it was that the driver failure of LED light source causes that the main reason for LED light breaks down is logical, which to be produced, at 50000 hours or more
's.
Under normal circumstances, user can not know when LED driver fails or will fail in time, therefore,
Usually all it is just to be replaced after LED driver failure in the prior art, reduces the security performance of LED information display system, increase
Because not knowing LED driver failure and failing to carry out LED driver economic loss caused by replacing in time, brought to life
Inconvenience.
Therefore, how to provide it is a kind of the service life of LED driver can be prompted so that LED driver will
The LED driver of prompting user is the current problem to be solved of those skilled in the art when failure.
Summary of the invention
The object of the present invention is to provide a kind of LED drivers, can be real-time according to the state of the output end of main power circuit
The service life state to LED driver prompted accordingly, allow users to the service life for timely understanding LED driver,
And then can take precautions against and replace in time, the security performance of LED information display system is improved, is reduced because not knowing that LED driver fails
And fail to carry out LED driver economic loss caused by replacing in time.
In order to solve the above technical problems, being applied to a LED load circuit, packet the present invention provides a kind of LED driver
It includes:
Current sample network in the LED load circuit is set；
Input terminal is connected to the network with the current sample, output end is connect with the input terminal of the control circuit of multichannel respectively
Feed circuit；
Control circuit described in the multichannel that output end is connect with the control terminal of one-to-one main power circuit；
Input terminal is connect with power supply, output end accesses main power circuit described in the multichannel in the LED load circuit；
It is connect respectively with the output end of main power circuit described in every road, and the output end according to main power circuit described in every road
State health status detection circuit that the service life state of the LED driver is accordingly prompted.
Preferably, bright, no current leads to when the health status detection circuit specifically includes current-limiting resistance and has electric current to pass through
The out-of-date indicator light not worked, and the indicator light and the current-limiting resistance first connect after whole be again connected in parallel on corresponding main power circuit
Output end.
Preferably, the health status detection circuit specifically includes:
Voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driving according to all voltage signals
The service life state of device and the wireless transmission circuit that the service life state is wirelessly sent to user.
Preferably, the health status detection circuit specifically includes:
Current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Current sampling circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driving according to all current signals
The service life state of device and the wireless transmission circuit that the service life state is wirelessly sent to user.
Preferably, the wireless transmission circuit is the wireless transmission circuit using Zigbee-technology or Bluetooth technology.
Preferably, the health status detection circuit specifically includes:
Voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driving according to all voltage signals
The service life state of device and the display circuit that the service life state is shown.
Preferably, the health status detection circuit specifically includes:
Current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Current sampling circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driving according to all current signals
The service life state of device and the display circuit that the service life state is shown.
Preferably, the health status detection circuit specifically includes:
Voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driving according to all voltage signals
The service life state of device and the circuit for alarming sounded an alarm when the service life state is lower than preset value.
Preferably, the health status detection circuit specifically includes:
Current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Current sampling circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driving according to all current signals
The service life state of device and the circuit for alarming sounded an alarm when the service life state is lower than preset value.
Preferably, the control circuit is pwm control circuit or PFM control circuit.
The present invention provides a kind of LED drivers, in addition to the main function including current sample network, feed circuit and multichannel
It further include being connect respectively with the output end of every road main power circuit, and according to every road outside rate circuit and its corresponding control circuit
The health status detection circuit that the state of the output end of main power circuit accordingly prompts the service life state of LED driver.
As it can be seen that LED driver provided by the invention can be according to the state of the output end of main power circuit in real time to LED driver
Service life state is prompted accordingly, allows users to the service life for timely understanding LED driver, and then can take precautions against in time
And replacement, LED driver can be maximumlly used, the security performance of LED information display system is improved, is reduced because not knowing LED
Driver fails and fails to carry out LED driver economic loss caused by replacing in time.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of LED driver provided by the invention；
Fig. 2 is the structural schematic diagram of another LED driver provided by the invention；
Fig. 3 is the structural schematic diagram of another LED driver provided by the invention；
Fig. 4 is the structural schematic diagram of another LED driver provided by the invention；
Fig. 5 is the structural schematic diagram of another LED driver provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of LED driver, can be real-time according to the state of the output end of main power circuit
The service life state to LED driver prompted accordingly, allow users to the service life for timely understanding LED driver,
And then can take precautions against and replace in time, the security performance of LED information display system is improved, is reduced because not knowing that LED driver fails
And fail to carry out LED driver economic loss caused by replacing in time.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of LED driver provided by the invention, the LED driver application
In a LED load circuit, comprising:
Current sample network 1 in LED load circuit is set；
Input terminal is connect with current sample network 1, output end connect respectively with the input terminal of the control circuit of multichannel 3 it is anti-
Current feed circuit 2；
The multi-channel control circuit 3 that output end is connect with the control terminal of one-to-one main power circuit 4；
Specifically, control circuit 3 be PWM (Pulse Width Modulation, pulse width modulation) control circuit or
Person PFM (Pulse frequency modulation, pulse frequency modulated) control circuit.Which kind of certainly, specifically controlled using
Circuit is determined according to the actual situation.
Specifically, control circuit 3 and its corresponding main power circuit 4 are specially 4 tunnels.Certainly, control circuit 3 here and
The number of its corresponding main power circuit 4 can also be other numerical value, for example, 3 tunnels or 5 tunnels, the present invention is not done especially herein
Restriction.
Input terminal is connect with power supply, output end accesses the multichannel main power circuit 4 in LED load circuit；
It is connect respectively with the output end of every road main power circuit 4, and the state of the output end according to every road main power circuit 4
The health status detection circuit 5 that the service life state of LED driver is accordingly prompted.
It is understood that current sample network 1 is acquired the total current in LED load circuit, and will be collected
Current signal is sent to feed circuit 2, and feed circuit 2, which receives, to be exported corresponding voltage signal to every road after current signal and control
Circuit 3, control circuit 3 is according to the corresponding control signal of voltage signal output received to corresponding main power circuit 4, main function
Electric current of the rate circuit 4 according to control signal adjustment output, realizes the closed loop of the total current to all output of main power circuit 4
Control, precision is high, ensure that the steady operation of LED light.
Preferably, bright, no current leads to when health status detection circuit 5 specifically includes current-limiting resistance and has electric current to pass through
The out-of-date indicator light not worked, and indicator light and current-limiting resistance first connect after the whole output for being connected in parallel on corresponding main power circuit 4 again
End.
Specifically, referring to figure 2., Fig. 2 is the structural schematic diagram of another LED driver provided by the invention；
It is understood that when control circuit 3 and its corresponding main power circuit 4 all in driver work normally
When, then the output end of each main power circuit 4, which has on voltage namely current-limiting resistance and indicator light, has electric current to flow through, at this time institute
Some indicator lights are just being always on；When wherein certain one or more control circuit 3 or the corresponding main power circuit of control circuit 3
When 4 failure failure, then corresponding 4 output end of main power circuit can not have voltage, namely current-limiting resistance and indicator light at this time
Upper no electric current flows through, then indicator light does not work at this time.Therefore, user can be known by the light on and off number of viewing lamp
The service life state of LED driver, and then can take precautions against and replace in time, improves the security performance of LED information display system, reduce because
LED driver failure is not known and fails to carry out LED driver economic loss caused by replacing in time.
Then it will be understood that indicator light it is bright number it is more, then illustrate that the health status of LED driver at this time is better；Phase
Anti-, the bright number of indicator light is fewer, then illustrates that the health status of LED driver at this time is more bad.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the voltage signal for acquiring corresponding 4 output end of main power circuit
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, the service life for calculating LED driver according to all voltage signals
State and the wireless transmission circuit that service life state is wirelessly sent to user.
Preferably, wireless transmission circuit is the wireless transmission circuit using Zigbee-technology or Bluetooth technology.When
So, the present invention can also use the wireless transmission circuit based on other technologies, such as the wireless transmission circuit based on WiFi technology,
The present invention is not particularly limited herein, is able to achieve the purpose of the present invention.
Specifically, referring to figure 3., Fig. 3 is the structural schematic diagram of another LED driver provided by the invention；
Firstly the need of explanation, in the application, the calculation method of the service life state of wireless transmission circuit is equal are as follows:
It is assumed that control circuit 3 and its corresponding main power circuit 4 are the road N altogether, wherein occur having M (M≤N) altogether
Road is failed because breaking down, then service life state=M/N*100%, and therefore, percentage is smaller, then illustrates LED driver at this time
Health status it is more bad；Opposite, percentage is bigger, then illustrates that the health status of LED driver at this time is better.
It is understood that when control circuit 3 and its corresponding main power circuit 4 all in driver work normally
When, then the output end of each main power circuit 4 has voltage namely the collected voltage value of voltage sampling circuit to be not zero, this
When the calculated service life state of wireless transmission circuit be 100%；When wherein certain one or more control circuit 3 or control electricity
When the failure failure of the corresponding main power circuit 4 in road 3, then the output end of corresponding main power circuit 4 can not have voltage, namely
The collected voltage value of voltage sampling circuit is zero at this time, then wireless transmission circuit can calculate corresponding service life state simultaneously at this time
Service life state is wirelessly sent to the client of user, it is zero corresponding number M divided by total that circular, which is with voltage value,
Number N.Therefore, user can calculate corresponding service life state by the wireless transmission circuit that client is shown and know LED
The service life state of driver, and then the driver more renewed can be determined when, it can take precautions against and replace in time, improve LED
The security performance of system reduces because not knowing LED driver failure and failing replace in time to LED driver to cause
Economic loss.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the current signal for acquiring corresponding 4 output end of main power circuit
Current sampling circuit；
It is connect respectively with each current sampling circuit, the service life for calculating LED driver according to all current signals
State and the wireless transmission circuit that service life state is wirelessly sent to user.
Specifically, here in addition to Acquisition Circuit and its signal of acquisition are that current signal is different from above-mentioned voltage signal
Outside, other processes are similar with the understanding process of above-mentioned voltage signal, and details are not described herein by the application.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the voltage signal for acquiring corresponding 4 output end of main power circuit
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, the service life for calculating LED driver according to all voltage signals
State and the display circuit that service life state is shown.
Specifically, referring to figure 4., Fig. 4 is the structural schematic diagram of another LED driver provided by the invention；
It is understood that when control circuit 3 and its corresponding main power circuit 4 all in driver work normally
When, then the output end of each main power circuit 4 has voltage namely the collected voltage value of voltage sampling circuit to be not zero, this
When the calculated service life state of wireless transmission circuit be 100%；When wherein certain one or more control circuit 3 or control electricity
The corresponding main power circuit 4 in road 3 break down failure when, then corresponding 4 output end of main power circuit can without voltage namely this
When the collected voltage value of voltage sampling circuit be zero, then display circuit can calculate corresponding service life state and to the service life at this time
State is shown, the direct viewing of user is facilitated.Therefore, the service life state that user can be shown by display circuit is known
The service life state of LED driver, and then the driver more renewed can be determined when, it can take precautions against and replace in time, improve
The security performance of LED information display system reduces because not knowing LED driver failure and failing to replace LED driver in time
Caused by economic loss.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the current signal for acquiring corresponding 4 output end of main power circuit
Current sampling circuit；
It is connect respectively with each current sampling circuit, the service life for calculating LED driver according to all current signals
State and the display circuit that service life state is shown.
Specifically, here in addition to Acquisition Circuit and its signal of acquisition are that current signal is different from above-mentioned voltage signal
Outside, other processes are similar with the understanding process of above-mentioned voltage signal, and details are not described herein by the application.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the voltage signal for acquiring corresponding 4 output end of main power circuit
Voltage sampling circuit；
It is connect respectively with each voltage sampling circuit, the service life for calculating LED driver according to all voltage signals
State and the circuit for alarming sounded an alarm when service life state is lower than preset value.
Specifically, referring to figure 5., Fig. 5 is the structural schematic diagram of another LED driver provided by the invention；
It is understood that when control circuit 3 and its corresponding main power circuit 4 all in driver work normally
When, then the output end of each main power circuit 4 has voltage namely the collected voltage value of voltage sampling circuit to be not zero, this
When the calculated service life state of wireless transmission circuit be 100%；When wherein certain one or more control circuit 3 or control electricity
The corresponding main power circuit 4 in road 3 break down failure when, then corresponding 4 output end of main power circuit can without voltage namely this
When the collected voltage value of voltage sampling circuit be zero, then display circuit can calculate corresponding service life state and to the service life at this time
Whether state is lower than preset value, sounds an alarm when being lower than preset value.Therefore, whether user can issue police by circuit for alarming
The service life state for knowing LED driver is offered, and then the driver more renewed can be determined when, can be taken precautions against in time and more
It changes, improves the security performance of LED information display system, reduce because not knowing LED driver failure and failing to carry out LED driver
Economic loss caused by replacement in time.
It is understood that then showing the health status of LED driver at this time very not when warning circuit is rung
It is good, it should be changed not long after the time.
In addition, preset value here be artificially can percentage X/N*100% in the received road N when the minimum also surplus road X,
Here X can be 1 or 2 or other numerical value, and the present invention is not particularly limited herein.
Preferably, health status detection circuit 5 specifically includes:
With the connection of the output end of corresponding main power circuit 4, the current signal for acquiring corresponding 4 output end of main power circuit
Current sampling circuit；
It is connect respectively with each current sampling circuit, the service life for calculating LED driver according to all current signals
State and the circuit for alarming sounded an alarm when service life state is lower than preset value.
Specifically, here in addition to Acquisition Circuit and its signal of acquisition are that current signal is different from above-mentioned voltage signal
Outside, other processes are similar with the understanding process of above-mentioned voltage signal, and details are not described herein by the application.
Preferably, circuit for alarming is specially buzzer alarm circuit.Certainly, it is not limited in buzzer warning here
Circuit can not also be particularly limited herein for other warning circuits, the present invention.
The present invention provides a kind of LED drivers, in addition to the main function including current sample network, feed circuit and multichannel
It further include being connect respectively with the output end of every road main power circuit, and according to every road outside rate circuit and its corresponding control circuit
The health status detection circuit that the state of the output end of main power circuit accordingly prompts the service life state of LED driver.
As it can be seen that LED driver provided by the invention can be according to the state of the output end of main power circuit in real time to LED driver
Service life state is prompted accordingly, allows users to the service life for timely understanding LED driver, and then can take precautions against in time
And replacement, LED driver can be maximumlly used, the security performance of LED information display system is improved, is reduced because not knowing LED
Driver fails and fails to carry out LED driver economic loss caused by replacing in time.
It should be noted that in the present specification, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of LED driver, which is characterized in that be applied to a LED load circuit, comprising:
Current sample network in the LED load circuit is set；
The feedback that input terminal is connected to the network with the current sample, output end is connect with the input terminal of the control circuit of multichannel respectively
Circuit；
Control circuit described in the multichannel that output end is connect with the control terminal of one-to-one main power circuit；
Input terminal is connect with power supply, output end accesses main power circuit described in the multichannel in the LED load circuit；
It is connect respectively with the output end of main power circuit described in every road, and the shape of the output end according to main power circuit described in every road
The health status detection circuit that state accordingly prompts the service life state of the LED driver.
2. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes current limliting
Resistance and when thering is electric current to pass through bright, no current by when the indicator light that does not work, and the indicator light and the current-limiting resistance are first gone here and there
Entirety is connected in parallel on the output end of corresponding main power circuit again after connection.
3. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The voltage of voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driver according to all voltage signals
Service life state and the wireless transmission circuit that the service life state is wirelessly sent to user.
4. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The electric current of current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driver according to all current signals
Service life state and the wireless transmission circuit that the service life state is wirelessly sent to user.
5. LED driver as described in claim 3 or 4, which is characterized in that the wireless transmission circuit is using zigbee skill
The wireless transmission circuit of art or Bluetooth technology.
6. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The voltage of voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driver according to all voltage signals
Service life state and the display circuit that the service life state is shown.
7. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The electric current of current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driver according to all current signals
Service life state and the display circuit that the service life state is shown.
8. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The voltage of voltage signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each voltage sampling circuit, for calculating the LED driver according to all voltage signals
Service life state and the circuit for alarming sounded an alarm when the service life state is lower than preset value.
9. LED driver as described in claim 1, which is characterized in that the health status detection circuit specifically includes:
The electric current of current signal with the connection of the output end of corresponding main power circuit, for acquiring corresponding main power circuit output end
Sample circuit；
It is connect respectively with each current sampling circuit, for calculating the LED driver according to all current signals
Service life state and the circuit for alarming sounded an alarm when the service life state is lower than preset value.
10. LED driver as described in claim 1, which is characterized in that the control circuit is that pwm control circuit or PFM are controlled
Circuit processed.
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| CN201610142864.6A CN105744679B (en) | 2016-03-14 | 2016-03-14 | A kind of LED driver |
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|---|---|---|---|
| CN201610142864.6A CN105744679B (en) | 2016-03-14 | 2016-03-14 | A kind of LED driver |
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| CN105744679B true CN105744679B (en) | 2018-12-11 |
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| CN106371038B (en) * | 2016-08-16 | 2020-01-17 | 腾讯科技（深圳）有限公司 | Lighting equipment health state determination method and device and lighting equipment |
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| CN101260997A (en) * | 2008-04-24 | 2008-09-10 | 辽宁九通电力电子有限公司 | Tandem LED driven intelligence control system possessing output protecting function |
| CN201937907U (en) * | 2010-12-23 | 2011-08-17 | 上海荣机控制系统有限公司 | LED driving power supply for train |
| CN204291444U (en) * | 2014-10-19 | 2015-04-22 | 万源市勇泰机械设备有限公司 | A kind of LED control system |
| CN205430688U (en) * | 2016-03-14 | 2016-08-03 | 杭州上达光电科技有限公司 | LED driver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7265522B2 (en) * | 2003-09-04 | 2007-09-04 | Marvell World Trade Ltd. | Dynamic multiphase operation |
| KR101341021B1 (en) * | 2009-12-11 | 2013-12-13 | 엘지디스플레이 주식회사 | Apparatus and method of driving light source |
| CN102548160B (en) * | 2011-12-23 | 2014-02-26 | 厦门兴恒隆照明科技有限公司 | Controller capable of prolonging service lives of lamps |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101260997A (en) * | 2008-04-24 | 2008-09-10 | 辽宁九通电力电子有限公司 | Tandem LED driven intelligence control system possessing output protecting function |
| CN201937907U (en) * | 2010-12-23 | 2011-08-17 | 上海荣机控制系统有限公司 | LED driving power supply for train |
| CN204291444U (en) * | 2014-10-19 | 2015-04-22 | 万源市勇泰机械设备有限公司 | A kind of LED control system |
| CN205430688U (en) * | 2016-03-14 | 2016-08-03 | 杭州上达光电科技有限公司 | LED driver |
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