CN103813570A - LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method - Google Patents
LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method Download PDFInfo
- Publication number
- CN103813570A CN103813570A CN201210447067.0A CN201210447067A CN103813570A CN 103813570 A CN103813570 A CN 103813570A CN 201210447067 A CN201210447067 A CN 201210447067A CN 103813570 A CN103813570 A CN 103813570A
- Authority
- CN
- China
- Prior art keywords
- led lamp
- string
- module
- led
- voltage
- 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.)
- Pending
Links
Images
Abstract
A constant-voltage drive LED lighting system comprises an adjustable constant-voltage power supply module and a plurality of wide-voltage LED lamp sets. Each of the wide-voltage LED lamp sets comprises m LED lamp strings, wherein m is an integer. The m LED lamp strings are connected in parallel and are powered by the adjustable constant-voltage power supply module in a centralized mode. The constant-voltage drive LED lighting system further comprises a current or voltage detecting module and an brightness-balancing and light-adjusting control module, wherein the current or voltage detecting module is used for detecting current of each string of the LED lamp sets and transmitting the current to the brightness-balancing and light-adjusting control module, and the brightness-balancing and light-adjusting control module is used for controlling the duty ratio of each string of the LED lamp sets. According to the invention, the design in which the driving power supply module and the LED lamp sets are separated is realized, and problems of low reliability, poor maintainability and the like for the design in which the driving power supply module and the LED lamp sets are arranged in a centralized mode are avoided.
Description
[technical field]
The present invention relates to all bright control circuits of a kind of LED, particularly a kind of wide region constant voltage drives and can realize all bright control circuit and constant voltage driving LED illuminator and all bright control method and LED illuminator constant voltage driving methods of LED of LED of even intelligent dimming control of LED brightness.
[background technology]
In today of economic develop rapidly, the frequent natural calamity causing due to the excessive exploitation of the disposable energy has been beaten the alarm bell of environmental protection to people, people's energy-conserving and environment-protective consciousness starts constantly to strengthen, energy-conservation, low-carbon (LC), environmental protection has become the main flow trend of current scientific and technological invention.Illumination is our one of requisite energy resource consumption of producing and live, and the lighting apparatus of being convenient to huge illumination power consumption and low conversion efficiency today has made the waste of the energy increasingly sharpen.LED is little with its volume, low power consuming, life-span is long, high brightness, low in calories, environmental protection, sturdy and durable, the advantageous characteristic such as the response time is short have attracted global eye thimble, so LED green light source replaces traditional lighting light source, becoming best emerging energy-conserving light source has been trend of the times, but, LED power supply adopts two schemes mostly now, the one, front end adopts constant voltage source, then in LED light source, be connected in series constant-current control circuit, current constant when although the method can guarantee LED work, but in the time that LED light source rated current is larger, constant-current control circuit loss is larger, reduce the efficiency of power supply, increase system cost.The second is that directly to adopt constant-current source be LED light source power supply, but this kind of method is in the time of LED light source light modulation, change constant-current source output current, can make the photochromic of LED light source change, affect illuminating effect, accelerated the light decay speed of LED, the useful life of having reduced LED simultaneously.This two method, all needs constant-current driving power supply module and LED lamp group to be arranged in the small space of fluorescent tube, fluorescent tube heat radiation difficulty, and temperature height has been accelerated LED light decay speed, has reduced LED useful life.
Be illustrated in figure 1 traditional constant voltage source drive scheme, this constant voltage drive scheme comprises a constant voltage source module, and civil power 220V alternating current is converted to constant voltage by it, drives series-parallel LED lamp group.In constant voltage driving LED circuit, the discreteness of the discreteness of Vout, each LED Lantern Festival pressure drop Vf, will cause the discrete of lamp string stream, and discrete (luminous intensity is directly proportional to electric current) that cause luminous intensity; General by increasing the resistance of current-limiting resistance R, reduce the discreteness of electric current.But nonetheless, the luminous intensity of the LED product of the constant voltage source drive circuit control shown in Fig. 1 in the time of real work cannot be controlled accurately; Meanwhile, increase the resistance of R, by too much the energy that causes wasting in resistance R, system energy efficiency reduces.So, generally lower to the discreteness requirement of luminous intensity, or to energy-conservation less demanding light scene, just can use constant voltage source drive pattern; As: advertising lamp, ornamental LED lamp drive design.
For this reason, existing main flow LED illuminating lamp, more turns to constant-current supply to drive, as shown in Figure 2.The total current I of constant-current supply module output determines, and equal to flow through each lamp string electric current I 1, I2 ... Im electric current sum.Because total Vf sum of each string LED lamp exists deviation, can cause I1, I2 ... Im is unequal.In general design, each lamp string can, by increasing resistance R (after I increase, the dividing potential drop in resistance R increases, and plays inhibitory action), can play certain current balance function.But also there is following problem in the driving of common constant-current supply: 1, for playing current-sharing inhibitory action, when multi-string LED is in parallel, need to increase the resistance of flows resistance R, effective power reduces; 2, current most producer does not all increase flows resistance R, but inhomogeneous due to each lamp string flow point cloth, when design, the general derating factor that increases electric current improves the reliability of product, but has improved like this cost of product; 3, due to total I=I1+I2+...+Im; So in the time that certain lamp string opens circuit because losing efficacy, other crosstalk streams all will increase; This will further affect the functional reliability of other lamp strings.4, adopt constant-current supply drive mode, cannot realize power module and lamp component from design; Also cannot realize 1 power module concentrates power supply to multiple LED lamp groups is provided.
In order more reasonably to utilize the energy, the LED-based characteristic of research staff, has proposed PWM light adjusting circuit scheme, and as shown in Figure 3, PWM light adjusting circuit scheme by the luminous duty ratio of pwm pulse control LED, realizes the adjusting of LED luminosity.PWM light adjusting circuit scheme, generally passes through Infrared remote controller or button by people, input light modulation demand; Then, PWM controller module, according to input requirements, adjusts the duty ratio of PWM, realizes the brightness regulation of LED lamp.But, also there is following technical problem in common PWM light adjusting circuit: 1. PWM control switch is as shown in Figure 3 that total current I is turn-offed to control; The equal flow problem of every cluster of lamps, ornamental, still not can solve.2, common PWM adjusting control circuit, does not detect the total current I of lamp string; Like this, the total brightness of lamp regulates, and only has the subjective sensation by people, and operates by man-machine control interface (remote control/key switch) notice PWM controller.And in the case of the identical brightness degree (PWM duty ratio) of input, the intrinsic brilliance of lamp is still subject to the impact such as voltage discreteness, Vf discreteness, and has larger difference.
Hereat, research staff has also proposed multiple constant current power driving circuit scheme, as shown in Figure 4.In order to solve the equal flow problem of multi-string LED lamp when in parallel, there is power supply chip producer that multiple constant current controller is provided, for every cluster of lamps, ornamental independently provides respectively constant-current supply.In the scheme of some higher gears, each lamp string is also increased to PWM dimmer design, realized Based Intelligent Control.But this technical scheme exists following technical problem equally: 1, each lamp string drive, although solved the problem of each lamp string current-sharing completely; Increase substantially but the complexity of power module and cost are corresponding.2, this scheme wants to realize power supply and lamp group separate design is very difficult, cannot realize multiple lamp group common source module centrally connected power supplies.
Therefore,, along with the application of LED light fixture is more and more wider, particularly the use & Control of the multiple LED light fixtures under a large area becomes the problem that the sector personnel must face.As for a parking lot, how to be effectively controlled at light fixtures all within the scope of 1000 square meters unified switch where necessary, and the brightness in LED lamp source is evenly controlled in gamut, and the realization of how to reach same brightness under minimum efficiency is all the problem that we need to solve.
As shown in Figure 5, a kind of constant-current driving LED illuminator of prior art, for adopting the power supply of 220V electric main, gives the LED lamp tube power supply that is dispersed in each region.Each fluorescent tube comprises a constant-current driving power supply, and multiple LED lamp string.This driving power generally adopts 220V, and AC turns DC constant-current driving power supply.The places such as current most parking lot, market, factory, family, 220V line layout is complete, and this fluorescent tube is directly inputted 220V power supply, applies more conveniently, and simultaneously for existing circuit layout system, the design of this system is most suitable really.But the constant-current driving LED illuminator of the prior art is due to power supply and fluorescent tube are concentrated to design, from the angle of LED fluorescent tube, still has some problems; 1. due to power supply and LED luminous tube, all belong to hear rate type parts; The two is enclosed in the fluorescent tube that volume is little (as T8 fluorescent tube), and the heat dissipation design of fluorescent tube is difficulty quite; Bad, the excess Temperature in pipe that dispels the heat, can accelerate the aging of LED encapsulation, reduces the useful life of fluorescent tube.2. for LED lamp pearl, under normal circumstances, can reach many decades useful life; But, electric power driving module, general useful life is on the low side; Like this, power supply and fluorescent tube are concentrated, and in the useful life of power module, will directly restrict the useful life of whole LED fluorescent tube.If the Design Mode of taking power supply to separate with fluorescent tube, power supply has been broken, and changes separately power supply, will better utilize the useful life of LED fluorescent tube.
For LED lamp bar, the lamp band of the purposes such as bridge, engineering, ad decoration, generally adopt DC power supply (12V, 24V etc.) power supply, and direct driving LED lamp string.The circuit diagram of the constant voltage driving LED illuminator of prior art as shown in Figure 6, this constant voltage source module centrally connected power supply, and physically separate with lamp group.Because power supply and lamp group, may separate far away, lamp string power is larger simultaneously, on power circuit, can have larger crushing, this directly causes the uncertain of the actual voltage that is added in lamp string two ends: 1,, more away from the lamp group of power module, the voltage at LED lamp string two ends is lower, the electric current that causes LED is reduced, and lamp brightness is also lower; 2 and the closer to the lamp group of power module, the voltage at LED lamp string two ends is higher, the electric current of LED is larger, brightness is larger; Meanwhile, power consumption also more greatly, even may exceed the rated power requirement of LED lamp pearl, causes the lost of life.3. general while adopting constant voltage source to drive, still can work reliably and especially significantly difference does not appear in each lamp cross luma degree in order to realize at voltage LED in certain scope, generally on lamp string increase a current-limiting resistance.While application for lamp bar/lamp band of centrally connected power supply, this divider resistance can divide to fall 25% left and right of total voltage conventionally, has wasted greatly power-efficient.
Therefore, be necessary very much to provide a kind of low cost that can effectively solve the equal flow problem of multi-string LED lamp time in parallel, all bright control circuits and adopt all constant voltage driving LED illuminators of bright control circuit of this LED of highly reliable LED, particularly can realize the centrally connected power supply design that power supply separates with lamp string.
[summary of the invention]
Merge with LED lamp string the existing problem that designs for overcoming driving power module in brightness irregularities when in parallel of the multi-string LED lamp of prior art and LED illuminator, the invention provides a kind of low cost that can effectively solve all bright problem of multi-string LED lamp when in parallel, all bright control circuits and adopt all constant voltage driving LED illuminator and all bright control methods of LED of bright control circuit of this LED of highly reliable LED.
The technical scheme of technical solution problem of the present invention is: all bright control circuits of a kind of LED are provided, it comprises a constant voltage source module, m (m is integer) string LED lamp string, the connection in series-parallel of this m string LED lamp connects, by this LED constant voltage source module centrally connected power supply, further comprise all bright and dimming controlling module of a curtage detection module and, this curtage detection module is for detection of the electric current of every string LED lamp group, and send this all bright and dimming controlling module to, by this equal every a string LED lamp group duty ratio of bright and dimming controlling module control.
Preferably, this LED lamp string comprises n LED lamp, a control switch, and a resistance, this N LED lamp, control switch, and resistance connects successively, each link of this curtage detection module is connected to respectively the circuit node between resistance and this control switch.
Preferably, further comprise a color temperature compensating lamp string LED lamp string, it is connected with this LED lamp connection in series-parallel, and it comprises n LED lamp, a control switch, and a resistance, this n LED lamp, control switch, and resistance is connected successively.
Preferably; these are the control switch of bright and this each LED lamp string of dimming controlling module control all; when this current detection module detects that lamp string is in opening circuit, under short circuit, overcurrent, under-voltage abnormal conditions; by this all bright and dimming controlling module realize the open-circuit-protection processing to lamp string, this all bright and dimming controlling module can further receive infrared remote control or wireless signal to control the control switch of each LED lamp string.
The another technical scheme of technical solution problem of the present invention is: a kind of constant voltage driving LED illuminator is provided, it comprises an adjustable constant voltage power module, and multiple wide voltage LED lamp groups, this each wide voltage LED lamp group comprises m (m is integer) string LED lamp string, the connection in series-parallel of this m string LED lamp connects, by this adjustable constant voltage power module centrally connected power supply, further comprise all bright and dimming controlling module of a curtage detection module and, this curtage detection module is for detection of the electric current of every string LED lamp group, and send this all bright and dimming controlling module to, by this equal every a string LED lamp group duty ratio of bright and dimming controlling module control.
Preferably, this each wide voltage LED lamp group further comprises voltage requirements analysis module, it is connected with this curtage detection module, draws the voltage difference between current voltage value and ideal value by the curtage value analysis detecting, and judges whether overvoltage of current voltage; This adjustable constant voltage power module further comprises a desired voltage computing module, it receives the voltage difference or the overvoltage warning information that return from the voltage requirements analysis module of each wide voltage LED lamp group, and exports according to the adjustment strategy of the validation of information output voltage of receptions the power supply of controlling this adjustable constant voltage power module.
Preferably, this each wide voltage LED lamp group further comprises a direct current power line carrier transceiver module, one infrared signal transceiver module or a radio receiving transmitting module, this adjustable constant voltage power module further comprises a corresponding direct current supply line carrier transmitting-receiving module with it, one infrared signal transceiver module or a radio receiving transmitting module, for transmitting voltage difference and the overvoltage warning information of each wide voltage LED lamp group.
Preferably; this LED lamp string comprises n LED lamp; one control switch; one resistance; this n LED lamp; control switch; and resistance is connected successively; this curtage detection module is connected to the circuit node between resistance and this control switch; these are the control switch of bright and this each LED lamp string of dimming controlling module control all; when this current detection module detects that lamp string is in opening circuit, under short circuit, overcurrent, under-voltage abnormal conditions, by this all bright and dimming controlling module realize the open-circuit-protection processing to lamp string.
A technical scheme again of technical solution problem of the present invention is: all bright control methods of a kind of LED are provided, and it comprises the following steps: step S1: provide a constant voltage source to multiple multi-string LED lamp strings that are connected in parallel; And step S2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep same high brightness luminescent under same constant voltage source power supply.
Another technical scheme of technical solution problem of the present invention is: a kind of LED illuminator constant voltage driving method is provided, it comprises the following steps: step SD1: provide an adjustable constant voltage power supply to multiple multiple LED lamp groups that are connected in parallel, wherein, each lamp group comprises multiple LED lamp strings that are connected in parallel; Step SD2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep luminous with brightness under same constant voltage source power supply, carry out the analysis of each lamp group voltage requirements according to the current value of each LED lamp group simultaneously; And step SD3: feed back the output voltage size of this each lamp group voltage requirements analysis result to this adjustable constant voltage power supply this adjustable constant voltage power supply of analysis confirmation.
Compared with prior art, LED of the present invention is bright control circuit all, because the required precision to constant voltage source is lower, can be adapted to the voltage of relative broad range, can be widely used in power supply, lamp component from power line there is the room lighting scene of certain crushing; LED light fixture adopts centrally connected power supply, and reliability is high, maintenanceability good, and cost is low; Lamp group accurately detects dynamic current, and combined with intelligent dimmer design realizes all even intelligent dimming control of the brightness of each lamp string in lamp group; Each lamp string is independently controlled, and the reliability of product significantly promotes; Meanwhile, each lamp string can maximum emission intensity work, gives full play to the luminous efficacy of LED lamp pearl, has reduced product cost.Again, because this constant voltage driving LED illuminator adopts driving power module and LED lamp group separate design, some problems in power supply and LED lamp trail are evaded, as: concentrated design causes the interior excess Temperature of fluorescent tube, reliability low; When power supply and fluorescent tube damage separately, the maintenanceability such as need to all return to poor etc.Separately, lamp group part adopts the LED lamp group of wide power voltage supply, has solved the inconsistent problem of brightness that the discretenesses such as the Vf of crushing, lamp string on power circuit cause; Meanwhile, avoided adopting in current constant voltage source drive scheme the problem of the power loss of flows resistance.Again, this constant voltage driving LED illuminator, by direct current supply line ZAP, is informed electric power driving module by the reasonable voltage demand of lamp string, and electric power driving module according to demand, provide and reasonably stablize constant-voltage DC source, in meeting system works requirement, reach the energy consumption optimum of system; Simultaneously also evade the uncertainty of crushing on power circuit, caused the defect that system voltage parameter cannot be selected.
[accompanying drawing explanation]
Fig. 1 is the circuit diagram of the constant voltage source driving LED lamp string scheme of prior art.
Fig. 2 is the circuit diagram of the constant-current supply driving LED lamp string scheme of prior art.
Fig. 3 is the circuit diagram of the PWM light adjusting circuit driving LED lamp string scheme of prior art.
Fig. 4 is the circuit diagram of road constant-current supply driving LED lamp string scheme more than prior art.
Fig. 5 is the circuit diagram of the constant-current driving LED illuminator of prior art.
Fig. 6 is the circuit diagram of the constant voltage driving LED illuminator of prior art.
Fig. 7 is all circuit diagrams of bright control circuit of LED of first embodiment of the invention.
Fig. 8 is the circuit diagram of the constant voltage driving LED illuminator of second embodiment of the invention.
Fig. 9 is the circuit diagram of the wide voltage LED lamp group of the constant voltage driving LED illuminator shown in Fig. 8.
Figure 10 is the illustrative view of functional configuration of the adjustable constant voltage power supply of the constant voltage driving LED illuminator shown in Fig. 8.
Figure 11 third embodiment of the invention with all bright control methods of the LED that all bright control circuit is corresponding of the LED shown in Fig. 7.
Figure 12 is LED illuminator constant voltage driving method corresponding to constant voltage driving LED illuminator four embodiment of the invention and shown in Fig. 8.
[embodiment]
In order to make object of the present invention, technical scheme and advantage are clearer, below in conjunction with drawings and Examples, the present invention are further elaborated.Should be appreciated that concrete case study on implementation described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 7, first embodiment of the invention circuit diagram.This LED all bright control circuit 100 comprises all bright and dimming controlling module 105 of constant voltage source module 101, one current detection modules 103,, m string LED lamp string L1, L2......Lm, and a color temperature compensating lamp string Lt.This m string LED lamp group L1, L2......Lm and this color temperature compensating lamp string Lt are connected in parallel, powered by this LED constant voltage source module 101, this current detection module 103 is for detection of every string LED lamp group L1, the electric current of L2......Lm, and send this all bright and dimming controlling module 105 to, by this all bright and dimming controlling module 105 calculate every a string LED lamp group L1, the duty ratio demand of L2......Lm is also controlled, in the present embodiment this all bright and dimming controlling module 105 adopt PWM (Pulse Width Modulation) control module regulate, consistent to realize the brightness of all lamp strings.
This every a string LED lamp string L1, L2......Lm comprises respectively n LED lamp, a control switch and a resistance, this n LED lamp, control switch and resistance are connected successively.Take LED lamp group L1 and LED lamp group Lm as example, this LED lamp string L1 comprises n LED lamp D11, D12......D1n, and a control switch S1, a resistance R 1, this n LED lamp D11, D12......D1n, control switch S1, and resistance R 1 is connected successively.This LED lamp string Lm comprises n LED lamp Dm1, Dm2......Dmn, and a control switch Sm, a resistance R m, this n LED lamp Dm1, Dm2......Dmn, control switch Sm, and resistance R m connects successively.This color temperature compensating lamp string LED lamp string Lt comprises n LED lamp Dt1, Dt2......Dtn, and a control switch St, a resistance R t, this n LED lamp Dt1, Dt2......Dtn, control switch St, and resistance R t connects successively.
This current detection module 103, the detection of the electric current when each lamp string is opened, it comprises m+1 test side, is connected to respectively each lamp string L1, L2......Lm, the resistance R 1 of Lt, R2......Rm, Rt and control switch S1, S2......Sm, the circuit node between St.This current detection module 103 also can be by each lamp string L1, L2......Lm, and the detection of Lt electric current realizes each lamp string L1, L2......Lm, the detection of the open circuit of Lt, short circuit, overcurrent, the abnormal applicable cases such as under-voltage; And in the time that abnormal conditions occur, by this all bright and dimming controlling module 105 realize the open-circuit-protection processing to lamp string.
These are bright and dimming controlling module 105 all, according to each lamp string L1, and L2......Lm, the current value of Lt, calculates each lamp string L1, L2......Lm, the luminous PWM duty ratio of Lt, to each lamp string L1, L2......Lm, Lt carries out switch control; Realize each lamp string L1, L2......Lm, the brightness of Lt reaches the value of setting.For example: while setting 30mA electric current, PWM duty ratio is 100%; When 50mA electric current, PWM duty ratio is: 30/50 × 100%=60% so.
In the process using, this LED constant voltage source module 101 is to each lamp string L1, L2......Lm, Lt power supply, this current detection module 103 is for detection of every string LED lamp group L1, L2......Lm, electric current when Lt opens, and send this all bright and dimming controlling module 105 to, by this all bright and dimming controlling module 105 confirm every a string LED lamp group L1 according to current detection value, L2......Lm, the duty ratio of Lt, by each control switch S1, S2......Sm, St controls each lamp string L1, L2......Lm, the opening time of Lt.
Compared to prior art, LED of the present invention is bright control circuit 100 all, because the required precision to constant voltage source is lower, can be adapted to the voltage of relative broad range, can be widely used in power supply, lamp component from power line there is the room lighting scene of certain crushing; LED light fixture adopts centrally connected power supply, and reliability is high, maintenanceability good, and cost is low; Lamp group accurately detects dynamic current, and combined with intelligent dimmer design realizes all even intelligent dimming control of the brightness of each lamp string in lamp group; Each lamp string is independently controlled, and the reliability of product significantly promotes; Meanwhile, each lamp string can maximum emission intensity work, gives full play to the luminous efficacy of LED lamp pearl, has reduced product cost.
The present invention can also have some distortion execution modes, such as: this all bright and dimming controlling module 105 can also receive the light modulation demand of the control signal such as infrared remote control, key switch, and by PWM duty cycle adjustment, realize each lamp string L1, L2......Lm, the adjustment of Lt brightness.Another this current detection module 103 can also replace with a voltage detection module, and it passes through to detect the resistance R 1 on lamp string, R2......Rm, and the magnitude of voltage on Rt the resistance by each resistance are measured electric current and are sent this all bright and dimming controlling module 105 to.
Referring to Fig. 8, is the circuit diagram of the constant voltage driving LED illuminator 200 of second embodiment of the invention.This constant voltage driving LED illuminator 200 comprises an adjustable constant voltage power module 201, and multiple wide voltage LED lamp group 202, and this adjustable constant voltage power module 201 is the plurality of wide voltage LED lamp group 202 centrally connected power supplies, and this X wide voltage LED lamp group 202 is connected in parallel.When general application, lamp component is fallen apart and power supply has certain distance, and the internal resistance of power circuit causes circuit crushing, finally causes the actual voltage that is added in lamp group two ends to be less than Vout; As shown in Figure 8, the virtual voltage of lamp group 1 is: Vout-2* Δ V1; And from the both end voltage of power module lamp group x be farthest: Vout-2* (Δ V1+ Δ V2+...+ Δ Vx).And application conditions difference, the crushing of circuit is not exclusively to determine, can only have empirical value roughly to estimate.
This X wide voltage LED lamp group 202 has respectively identical circuit structure, as shown in Figure 9, each wide voltage LED lamp group 202 comprises all bright control modules 2025 of a current detection module 2023,, one voltage requirements analysis module 2027, one direct current power line carrier transceiver module 2029 and m string LED lamp string SL1, SL2......SLm.This m string LED lamp group SL1, SL2......SLm is connected in parallel, by these adjustable constant voltage power module 201 centrally connected power supplies, this current detection module 2023 is for detection of every string LED lamp group SL1, the electric current of SL2......SLm, and send this all bright control module 2025 and this voltage requirements analysis module 2027 to, by this all bright control module 2025 control every a string LED lamp group SL1, the duty ratio of SL2......SLm, and utilize this power line carrier that coherent signal is reported to this adjustable constant voltage power module 201 by this direct current carrier module after the firing current value of the each lamp string obtaining comprehensively being analyzed by this voltage requirements analysis module.
This every a string LED lamp string SL1, SL2......SLm comprises respectively N LED lamp, a control switch and a resistance, this N LED lamp, control switch and resistance are connected successively.Take LED lamp group SL1 and LED lamp group SLm as example, this LED lamp string SL1 comprises n LED lamp SD11, SD12......SD1n, and a control switch SS1, a resistance SR1, this n LED lamp SD11, SD12......SD1n, control switch SS1, and resistance SR1 connects successively.This LED lamp string SLm comprises n LED lamp SDm1, SDm2......SDmn, and a control switch SSm, a resistance SRm, this N LED lamp SDm1, SDm2......SDmn, control switch SSm, and resistance SRm connects successively.
This current detection module 2023, for the detection of the electric current under each lamp string opening, it comprises m+1 test side, be connected to respectively each lamp string SL1, the resistance SR1 of SL2......SLm, SR2......SR and control switch SS1, the circuit node between SS2......SSm.This current detection module 2023 also can be by each lamp string SL1, and the detection of SL2......SLm electric current realizes each lamp string SL1, the detection of the open circuit of SL2......SLm, short circuit, overcurrent, the abnormal applicable cases such as under-voltage; And in the time that abnormal conditions occur, by this, all bright control module 2025 or this voltage requirements analysis module 2027 are realized the open-circuit-protection processing to each lamp string.
This all bright and dimming controlling module 205 be a PWM (Pulse WidthModulation) control module, it is according to each lamp string SL1, L2......Lm, the current value of Lt, calculates each lamp string L1, L2......Lm, the luminous PWM duty ratio of Lt, to each lamp string L1, L2......Lm, L t carries out switch control; Realize each lamp string L1, L2......Lm, the brightness of Lt reaches the value of setting.For example: while setting 30mA electric current, PWM duty ratio is 100%; When 50mA electric current, PWM duty ratio is: 30/50 × 100%=60% so.Like this, can realize the in the situation that of different curtage, guarantee the brightness uniformity of each lamp group.
This voltage requirements analysis module 2027, obtain the firing current value from the each lamp string of this current detection module, comprehensive analysis, draws the difference DELTA VNx between current Vout ' value and ideal value (minimum voltage value that each lamp string of native system can normally be worked); Meanwhile, judge whether overvoltage of power supply according to Vout ' value; Then,, by this direct current supply line carrier transmitting-receiving module 2029, by this difference DELTA VNx and overvoltage warning information, report to this adjustable constant voltage power module 201 by power line carrier communication.
Figure 10 is the illustrative view of functional configuration of the adjustable constant voltage power supply 201 of the constant voltage driving LED illuminator 200 shown in Fig. 8.This adjustable constant voltage power module 201 comprises AC-DC adjustable constant voltage power supply 2011, one voltage-regulation control module 2013, one desired voltage computing modules 2017 and a direct current power line carrier transceiver module 2015.This AC-DC adjustable constant voltage power supply 2011 is responsible for providing the signal of telecommunication to the plurality of wide voltage LED lamp group 202, this direct current supply line carrier transmitting-receiving module 2015 receives the difference DELTA VNx between multiple current Vout ' value and the ideal value of sending back respectively from the direct current supply line carrier transmitting-receiving module 2029 of the plurality of wide voltage LED lamp group 202, and deliver to this desired voltage computing block 2017 and calculate, finally realize the adjusting of the output voltage to this AC-DC adjustable constant voltage power supply 2011 by this voltage control module 2013.Consider the uncertainty of circuit crushing, this adjustable constant voltage power supply 201 is by obtaining the voltage requirements of the wide voltage LED of each load lamp group 202 in system, and analyze through comprehensive, export optimum stable DC voltage, ensureing under the prerequisite of each wide voltage LED lamp group 202 normal work, reach system energy efficiency optimum.
This direct current supply line carrier transmitting-receiving module 2015, the order of real time down information, and obtain voltage difference Δ VN1, the Δ VN2...... Δ VNx that the wide voltage LED of each load lamp group 202 is returned, and the overvoltage warning information of each wide voltage LED lamp group 202 loads.This desired voltage computing module 2012, according to magnitude of voltage difference and the overvoltage warning information collected, provides the adjustment strategy of output voltage; And notify voltage-regulation control module 2013, output regulates indication; This AC-DC adjustable constant voltage power supply 2011, according to voltage-regulation indication, carries out boosting or reduction regulation of voltage.
In the process using, the adjusting detailed process of these constant voltage driving LED illuminator 200 voltages is: if the VN1 that a collects, Δ VN2...... Δ VNx be on the occasion of, get wherein minimum value, and stay certain surplus, notice voltage-regulation control module, progressively turns output voltage down; Reach the most rational magnitude of voltage, realize the target of entire system efficiency optimum.If b is VN1, have negative value in Δ VN2...... Δ VNx, illustrate that the driving voltage value of this fluorescent tube is inadequate; Now, if the warning information of non-loaded overvoltage should be notified voltage-regulation control module, carry out the adjusting of boosting of once small stepping; Boost after adjusting, should at least carry out the inquiry of a load voltage, determine without overvoltage alarm, then carry out the adjusting of boosting of once small stepping; ... until all load voltage values all meet the demands, the while is without overvoltage alarm.If c exists overvoltage alarm and the inadequate situation of other load voltages simultaneously, should preferentially ensure without overvoltage alarm; Now 202 loads of the wide voltage LED of part lamp group may be because of under-voltage, and brightness is inadequate, can carry out alarm by modes such as flashing lights, notifies user to check circuit etc.
Compared to prior art, because this constant voltage driving LED illuminator 200 adopts driving power module and LED lamp group separate design, some problems in power supply and LED lamp trail are evaded, as: concentrated design causes excess Temperature in fluorescent tube, reliability low; When power supply and fluorescent tube damage separately, the maintenanceability such as need to all return to poor etc.Separately, lamp group part adopts the LED lamp group of wide power voltage supply, has solved the inconsistent problem of brightness that the discretenesses such as the Vf of crushing, lamp string on power circuit cause; Meanwhile, avoided adopting in current constant voltage source drive scheme the problem of the power loss of flows resistance.Again, this constant voltage driving LED illuminator 200 is by direct current supply line ZAP, the reasonable voltage demand of lamp string is informed to electric power driving module, electric power driving module according to demand, provide and reasonably stablize constant-voltage DC source, in meeting system works requirement, reach the energy consumption optimum of system; Simultaneously also evade the uncertainty of crushing on power circuit, caused the defect that system voltage parameter cannot be selected.
In the present embodiment, adjust reporting of demand for this voltage, can also pass through infrared remote control, the mode such as wireless is transmitted relevant information or reports.
Figure 11 be third embodiment of the invention with all bright control methods of the LED that all bright control circuit is corresponding of the LED shown in Fig. 7.This LED is bright control method all, comprises the following steps:
Step S1: provide a constant voltage source to multiple multi-string LED lamp strings that are connected in parallel; This constant voltage source provides a constant voltage source signal to each lamp string.
Step S2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep same high brightness luminescent under same constant voltage source power supply; In this step, electric current can provide a current detection module to open for detection of every string LED lamp group time, and send equal bright and dimming controlling module to, by this all bright and dimming controlling module confirm the duty ratio of every a string LED lamp group according to current detection value, by the opening time of the each lamp string of each control switch control, thereby the LED lamp string of realization multi-series and parallel connection connection under the same constant voltage signal of telecommunication can evenly be put one's cards on the table luminous.Wherein, all bright and dimming controlling module can be a PWM control module.
Figure 12 is LED illuminator constant voltage driving method corresponding to constant voltage driving LED illuminator four embodiment of the invention and shown in Fig. 8.This LED illuminator constant voltage driving method, it comprises the following steps:
Step SD1: provide an adjustable constant voltage power supply to multiple multiple LED lamp groups that are connected in parallel, wherein, each lamp group comprises multiple LED lamp strings that are connected in parallel; This adjustable constant voltage power supply provides a variable constant voltage source signal to each LED lamp group.
Step SD2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep luminous with brightness under same constant voltage source power supply, carry out the analysis of each lamp group voltage requirements according to the current value of each LED lamp group simultaneously; In this step, first the electric current can provide a current detection module to open for detection of every string LED lamp group time, and send equal bright and dimming controlling module to, by this all bright and dimming controlling module confirm the duty ratio of every a string LED lamp group according to current detection value, by the opening time of the each lamp string of each control switch control, thereby the LED lamp string of realization multi-series and parallel connection connection under the same constant voltage signal of telecommunication can evenly be put one's cards on the table luminous.Wherein, all bright and dimming controlling module can be a PWM control module; Simultaneously, one voltage requirements analysis module is provided, obtain the firing current value from the each lamp string of this current detection module, comprehensively analyze, draw the difference DELTA VNx between current Vout ' value and ideal value (minimum voltage value that each lamp string of native system can normally be worked); Meanwhile, judge whether overvoltage of power supply according to Vout ' value; Then, by this difference DELTA VNx and overvoltage warning information, report to this adjustable constant voltage power supply by this signal of telecommunication transceiver module.This signal of telecommunication transceiver module can be direct current supply line ripple transceiver module, or an infrared transceiver module, or a radio receiving transmitting module.
Step SD3: feed back the output voltage size of this each lamp group voltage requirements analysis result to this adjustable constant voltage power supply this adjustable constant voltage power supply of analysis confirmation.Wherein, the voltage-regulation detailed process of this adjustable constant voltage power supply is: if the VN1 that a collects, Δ VN2... Δ VNx be on the occasion of, get wherein minimum value, and stay certain surplus, notice voltage-regulation control module, progressively turns output voltage down; Reach the most rational magnitude of voltage, realize the target of entire system efficiency optimum.If b is VN1, have negative value in Δ VN2...... Δ VNx, illustrate that the driving voltage value of this fluorescent tube is inadequate; Now, if the warning information of non-loaded overvoltage should be notified voltage-regulation control module, carry out the adjusting of boosting of once small stepping; Boost after adjusting, should at least carry out the inquiry of a load voltage, determine without overvoltage alarm, then carry out the adjusting of boosting of once small stepping; ... until all load voltage values all meet the demands, the while is without overvoltage alarm.If c exists overvoltage alarm and the inadequate situation of other load voltages simultaneously, should preferentially ensure without overvoltage alarm; Now part LED lamp group load may be because of under-voltage, and brightness is inadequate, can carry out alarm by modes such as flashing lights, notifies user to check circuit etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within principle of the present invention, are equal to and replace and within improvement etc. all should comprise protection scope of the present invention.
Claims (10)
1. all bright control circuits of a LED, it comprises a constant voltage source module, m (m is integer) string LED lamp string, the connection in series-parallel of this m string LED lamp connects, by this LED constant voltage source module centrally connected power supply, it is characterized in that: further comprise all bright and dimming controlling module of a curtage detection module and, this curtage detection module is for detection of the electric current of every string LED lamp group, and send this all bright and dimming controlling module to, by this equal every a string LED lamp group duty ratio of bright and dimming controlling module control.
2. all bright control circuits of LED as claimed in claim 1, it is characterized in that: this LED lamp string comprises n LED lamp, one control switch, one resistance, this N LED lamp, control switch, and resistance connects successively, each link of this curtage detection module is connected to respectively the circuit node between resistance and this control switch.
3. all bright control circuits of LED as claimed in claim 1, is characterized in that: further comprise a color temperature compensating lamp string LED lamp string, it is connected with this LED lamp connection in series-parallel, it comprises n LED lamp, a control switch, a resistance, this n LED lamp, control switch, and resistance is connected successively.
4. all bright control circuits of LED as claimed in claim 2 or claim 3; it is characterized in that: these are the control switch of bright and this each LED lamp string of dimming controlling module control all; when this current detection module detects that lamp string is in opening circuit, under short circuit, overcurrent, under-voltage abnormal conditions; by this all bright and dimming controlling module realize the open-circuit-protection processing to lamp string, this all bright and dimming controlling module can further receive infrared remote control or wireless signal to control the control switch of each LED lamp string.
5. a constant voltage driving LED illuminator, it comprises an adjustable constant voltage power module, and multiple wide voltage LED lamp groups, this each wide voltage LED lamp group comprises m (m is integer) string LED lamp string, the connection in series-parallel of this m string LED lamp connects, by this adjustable constant voltage power module centrally connected power supply, it is characterized in that: further comprise all bright and dimming controlling module of a curtage detection module and, this curtage detection module is for detection of the electric current of every string LED lamp group, and send this all bright and dimming controlling module to, by this equal every a string LED lamp group duty ratio of bright and dimming controlling module control.
6. constant voltage driving LED illuminator as claimed in claim 5, it is characterized in that: this each wide voltage LED lamp group further comprises voltage requirements analysis module, it is connected with this curtage detection module, draw the voltage difference between current voltage value and ideal value by the curtage value analysis detecting, and judge whether overvoltage of current voltage; This adjustable constant voltage power module further comprises a desired voltage computing module, it receives the voltage difference or the overvoltage warning information that return from the voltage requirements analysis module of each wide voltage LED lamp group, and exports according to the adjustment strategy of the validation of information output voltage of receptions the power supply of controlling this adjustable constant voltage power module.
7. constant voltage driving LED illuminator as claimed in claim 6, it is characterized in that: this each wide voltage LED lamp group further comprises a direct current power line carrier transceiver module, one infrared signal transceiver module or a radio receiving transmitting module, this adjustable constant voltage power module further comprises a corresponding direct current supply line carrier transmitting-receiving module with it, one infrared signal transceiver module or a radio receiving transmitting module, for transmitting voltage difference and the overvoltage warning information of each wide voltage LED lamp group.
8. constant voltage driving LED illuminator as claimed in claim 5, it is characterized in that: this LED lamp string comprises n LED lamp, one control switch, one resistance, this n LED lamp, control switch, and resistance is connected successively, this curtage detection module is connected to the circuit node between resistance and this control switch, these are the control switch of bright and this each LED lamp string of dimming controlling module control all, when this current detection module detects that lamp string is in road, short circuit, overcurrent, under under-voltage abnormal conditions, by this all bright and dimming controlling module realize the open-circuit-protection processing to lamp string.。
9. all bright control methods of LED, it comprises the following steps:
Step S1: provide a constant voltage source to multiple multi-string LED lamp strings that are connected in parallel; And
Step S2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep same high brightness luminescent under same constant voltage source power supply.
10. a LED illuminator constant voltage driving method, it comprises the following steps:
Step SD1: provide an adjustable constant voltage power supply to multiple multiple LED lamp groups that are connected in parallel, wherein, each lamp group comprises multiple LED lamp strings that are connected in parallel;
Step SD2: adjust the duty ratio of every string LED lamp string according to the current value of every string LED lamp string, realize multi-string LED lamp string and keep luminous with brightness under same constant voltage source power supply, carry out the analysis of each lamp group voltage requirements according to the current value of each LED lamp group simultaneously; And
Step SD3: feed back the output voltage size of this each lamp group voltage requirements analysis result to this adjustable constant voltage power supply this adjustable constant voltage power supply of analysis confirmation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447067.0A CN103813570A (en) | 2012-11-09 | 2012-11-09 | LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447067.0A CN103813570A (en) | 2012-11-09 | 2012-11-09 | LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103813570A true CN103813570A (en) | 2014-05-21 |
Family
ID=50709619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210447067.0A Pending CN103813570A (en) | 2012-11-09 | 2012-11-09 | LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103813570A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455245A (en) * | 2015-08-10 | 2017-02-22 | 法雷奥电机设备公司 | Protective circuit used for drive circuit |
| CN106507535A (en) * | 2016-10-30 | 2017-03-15 | 深圳市裕明鑫科技有限公司 | A kind of control circuit of high power wall washing lamp |
| CN108055718A (en) * | 2017-11-17 | 2018-05-18 | 广州视源电子科技股份有限公司 | LED current sharing controls method, system and circuit |
| CN109246889A (en) * | 2018-09-26 | 2019-01-18 | 华域视觉科技(上海)有限公司 | The LED drive circuit and its driving method and storage medium of DC-DC and linear combination |
| CN109982487A (en) * | 2019-04-23 | 2019-07-05 | 珠海其美光电科技有限公司 | A kind of LED line shape lamp of isometric impedance |
| CN110307477A (en) * | 2019-08-05 | 2019-10-08 | 厦门集长新材料科技有限公司 | A kind of constant-voltage LED light bar cut |
| CN110994960A (en) * | 2019-12-06 | 2020-04-10 | 苏州浪潮智能科技有限公司 | Power supply circuit and current sharing method |
| CN110996459A (en) * | 2019-12-24 | 2020-04-10 | 上海信耀电子有限公司 | Daytime running light drive circuit with dynamic effect |
| TWI698154B (en) * | 2019-07-31 | 2020-07-01 | 龍華科技大學 | LED dimming device |
| CN114340086A (en) * | 2022-01-14 | 2022-04-12 | 英飞特电子（杭州）股份有限公司 | Lighting system, target voltage value determination method, system and related assembly |
| CN114401567A (en) * | 2020-10-09 | 2022-04-26 | 京东方科技集团股份有限公司 | Control method of drive circuit, drive circuit and light-emitting substrate |
| DE102017119853B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for wireless control of the operating voltage for LED lighting |
| DE102017119849B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for error-resistant and energy-efficient power supply for LEDs |
| DE102017119851B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for wireless control of the operating voltage for consumers with a consumer-related fixed operating voltage (especially LEDs) |
| CN117793987B (en) * | 2024-02-23 | 2024-04-26 | 攀枝花镁森科技有限公司 | Method for controlling display of lamp strip, lamp strip and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210722A1 (en) * | 2006-03-09 | 2007-09-13 | Akitoyo Konno | LED lighting device and LCD device using the same |
| CN102111932A (en) * | 2009-12-24 | 2011-06-29 | 冠捷投资有限公司 | Light-emitting diode current balance circuit |
| CN102264173A (en) * | 2010-05-31 | 2011-11-30 | 英飞特电子（杭州）有限公司 | LED (light emitting diode) constant current driving circuit and output-voltage-adjustable circuit |
| CN202374525U (en) * | 2011-12-19 | 2012-08-08 | 企达工业(南京)有限公司 | Multiway LED constant-current dimming circuit |
-
2012
- 2012-11-09 CN CN201210447067.0A patent/CN103813570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210722A1 (en) * | 2006-03-09 | 2007-09-13 | Akitoyo Konno | LED lighting device and LCD device using the same |
| CN102111932A (en) * | 2009-12-24 | 2011-06-29 | 冠捷投资有限公司 | Light-emitting diode current balance circuit |
| CN102264173A (en) * | 2010-05-31 | 2011-11-30 | 英飞特电子（杭州）有限公司 | LED (light emitting diode) constant current driving circuit and output-voltage-adjustable circuit |
| CN202374525U (en) * | 2011-12-19 | 2012-08-08 | 企达工业(南京)有限公司 | Multiway LED constant-current dimming circuit |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455245A (en) * | 2015-08-10 | 2017-02-22 | 法雷奥电机设备公司 | Protective circuit used for drive circuit |
| CN106455245B (en) * | 2015-08-10 | 2020-05-12 | 法雷奥电机设备公司 | Protection circuit for driving circuit |
| DE102017119849B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for error-resistant and energy-efficient power supply for LEDs |
| DE102017119853B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for wireless control of the operating voltage for LED lighting |
| DE102017119851B4 (en) | 2016-08-29 | 2023-12-28 | Elmos Semiconductor Se | Method for wireless control of the operating voltage for consumers with a consumer-related fixed operating voltage (especially LEDs) |
| CN106507535A (en) * | 2016-10-30 | 2017-03-15 | 深圳市裕明鑫科技有限公司 | A kind of control circuit of high power wall washing lamp |
| CN106507535B (en) * | 2016-10-30 | 2018-02-06 | 深圳市裕明鑫科技有限公司 | The control circuit of high power wall washing lamp |
| CN108055718A (en) * | 2017-11-17 | 2018-05-18 | 广州视源电子科技股份有限公司 | LED current sharing controls method, system and circuit |
| CN109246889B (en) * | 2018-09-26 | 2024-03-05 | 华域视觉科技(上海)有限公司 | DC-DC and linear combination LED driving circuit, driving method thereof and storage medium |
| CN109246889A (en) * | 2018-09-26 | 2019-01-18 | 华域视觉科技(上海)有限公司 | The LED drive circuit and its driving method and storage medium of DC-DC and linear combination |
| CN109982487A (en) * | 2019-04-23 | 2019-07-05 | 珠海其美光电科技有限公司 | A kind of LED line shape lamp of isometric impedance |
| TWI698154B (en) * | 2019-07-31 | 2020-07-01 | 龍華科技大學 | LED dimming device |
| CN110307477A (en) * | 2019-08-05 | 2019-10-08 | 厦门集长新材料科技有限公司 | A kind of constant-voltage LED light bar cut |
| CN110994960A (en) * | 2019-12-06 | 2020-04-10 | 苏州浪潮智能科技有限公司 | Power supply circuit and current sharing method |
| CN110996459A (en) * | 2019-12-24 | 2020-04-10 | 上海信耀电子有限公司 | Daytime running light drive circuit with dynamic effect |
| CN114401567A (en) * | 2020-10-09 | 2022-04-26 | 京东方科技集团股份有限公司 | Control method of drive circuit, drive circuit and light-emitting substrate |
| CN114340086A (en) * | 2022-01-14 | 2022-04-12 | 英飞特电子（杭州）股份有限公司 | Lighting system, target voltage value determination method, system and related assembly |
| CN114340086B (en) * | 2022-01-14 | 2024-04-09 | 英飞特电子（杭州）股份有限公司 | Lighting system, target voltage value determining method and system and related components |
| CN117793987B (en) * | 2024-02-23 | 2024-04-26 | 攀枝花镁森科技有限公司 | Method for controlling display of lamp strip, lamp strip and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103813570A (en) | LED brightness balancing control circuit and method, and constant-voltage drive LED lighting system and method | |
| CN104427688B (en) | LED alternating-current drive circuit | |
| CN106132003B (en) | Dual-channel LED driver and control method thereof | |
| CN202603017U (en) | PWM dimming LED drive circuit | |
| CN203352858U (en) | LED all-turning-on control circuit and constant voltage driven LED illumination system | |
| CN102316648A (en) | Light-emitting diode (LED) illuminating device | |
| CN103874271B (en) | Power supply changeover device, relevant control circuit and method | |
| CN103929852A (en) | LED lamp with light and color capable of being adjusted | |
| CN202056568U (en) | Light adjustable LED lamp | |
| CN103957649A (en) | LED driving method and LED lighting circuit | |
| CN202603016U (en) | Driving circuit of LED (light-emitting diode) fluorescent lamp with adjustable light | |
| CN106954315A (en) | The driving power supply and television set of a kind of connection in series-parallel LED light bar network | |
| CN202261957U (en) | Light-emitting diode (LED) lighting device | |
| CN204929313U (en) | Luminous controlling means of LED lamps and lanterns and system | |
| CN203086808U (en) | Mixed color LED adjustable color temperature constant illumination intelligent LED plane lighting device | |
| CN201335285Y (en) | Combined LED illuminating device with high luminous efficiency and low brightness | |
| CN108901098A (en) | A kind of linear LED drive circuit of replaceable operating mode | |
| US9101000B2 (en) | Dimmable LED illuminating system | |
| CN106455205B (en) | Dual-channel L ED driver and open-circuit protection method thereof | |
| CN202634833U (en) | Diming circuit for light-emitting diode (LED) lamp | |
| CN201928495U (en) | Light emitting diode (LED) lamp dimmed by human body induction | |
| CN201967185U (en) | Light source control device and system | |
| CN201403231Y (en) | LED illumination lamp with stepless adjustable color temperature | |
| KR20130103263A (en) | Dimmable led lighting device | |
| CN107041042B (en) | A kind of adjustable LED light of light source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |