CN201928489U - Light-emitting diode (LED) dimming system - Google Patents
Light-emitting diode (LED) dimming system Download PDFInfo
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- CN201928489U CN201928489U CN2010206815249U CN201020681524U CN201928489U CN 201928489 U CN201928489 U CN 201928489U CN 2010206815249 U CN2010206815249 U CN 2010206815249U CN 201020681524 U CN201020681524 U CN 201020681524U CN 201928489 U CN201928489 U CN 201928489U
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Abstract
The utility model provides a light-emitting diode (LED) dimming system, comprising an intensive driving module and at lest one LED module, wherein each LED module comprises at least one LED branch; the input end of the intensive driving module is connected with a power supply, the intensive driving module receives a control signal representing a regulating command and is used for outputting direct-current bus voltage to each LED module, and the direct-current bus voltage carries the regulating command; and each LED module is used for detecting the regulating command carried by the direct-current bus voltage and regulating the current of the LED branch in the corresponding LED module according to the regulating command. The LED dimming system provided by the utility model only applies one intensive driving module, thereby being simple in structure and convenient in control, and further, the whole system has a lower cost.
Description
Technical field
The utility model relates to the light regulating technology field, particularly a kind of LED light adjusting system.
Background technology
The light adjusting system of LED illuminating lamp has been continued to use the light adjusting system of incandescent lamp at present, because the light adjusting system cost of incandescent lamp is lower.Referring to Fig. 1, this figure is the light adjusting system of LED illuminating lamp in the prior art.
The light adjusting system of this LED illuminating lamp comprises communication power supply 101, AC chopping dimmer 102, a n driver and n LED branch road.Wherein, n LED branch road is respectively A1, A2, until An.
The output of communication power supply 101 connects AC chopping dimmer 102; AC chopping dimmer 102 is used for unified driver to n parallel connection and carries out light modulation.The corresponding paths of LEDs branch road of each driver.
If driver is arranged on LED lamp source inside, the LED lamp directly can be linked in the existing incandescent lighting system, do not need to change existing wire laying mode.But will there be following shortcoming like this:
Each LED branch road all carries an AC/DC driver, will cause the circuit of whole light adjusting system complicated like this, controls also more complicated, increases the cost of entire circuit.
The utility model content
The technical problems to be solved in the utility model provides a kind of LED light adjusting system, and circuit structure is simple, and control is convenient, and cost is low.
The utility model embodiment provides a kind of LED light adjusting system, comprising: centralized driving module, at least one led module, each led module comprise at least one paths of LEDs branch road;
The input of centralized driving module connects power supply, and the centralized driving module receives the control signal that characterizes regulating command, is used to export DC bus-bar voltage and gives described each led module, and described DC bus-bar voltage is carried described regulating command;
Described each led module is used to detect the described regulating command that described DC bus-bar voltage is carried, and regulates the electric current of the LED branch road in this led module according to described regulating command.
Preferably, described regulating command is the amplitude or the AC ripple voltage of DC bus-bar voltage;
When described regulating command is the amplitude of DC bus-bar voltage, the different regulating command of different amplitude size representatives of described DC bus-bar voltage;
When described regulating command was AC ripple voltage, at least a characteristic parameter of described AC ripple voltage was represented regulating command.
Preferably, described centralized driving module comprises: voltage changer and output voltage controlling circuit;
Described output voltage controlling circuit is used to detect described DC bus-bar voltage and receives the control signal that described characterization control is instructed, and generates the adjusting control signal and exports to voltage changer;
The input of described voltage changer connects power supply, is used for giving each led module according to regulating control signal output DC bus-bar voltage.
Preferably, described output voltage controlling circuit comprises integrated transporting discharging, first divider resistance, second divider resistance, the 3rd resistance and compensating network;
The negative input end of described integrated transporting discharging connects the output negative terminal of voltage changer by the output plus terminal of first divider resistance connection voltage changer by second divider resistance;
The negative input end of described integrated transporting discharging connects the control signal of described characterization control instruction by the 3rd resistance;
The positive input terminal of described integrated transporting discharging connects reference voltage;
The output of described integrated transporting discharging connects described voltage changer as the output of this output voltage controlling circuit;
Be connected with described compensating network between the negative input end of described integrated transporting discharging and the output.
Preferably, described each led module comprises detection and change-over circuit and N LED branch road; N is a positive integer;
The color of the LED lamp in each LED branch road is identical, the corresponding constant-current circuit of each LED branch road;
Described detection and change-over circuit are used for detecting the regulating command that DC bus-bar voltage is carried, and described regulating command is converted to control signal corresponding sends to each constant-current circuit respectively;
Described constant-current circuit is used for providing constant electric current according to described control signal for the LED branch road of correspondence.
Preferably, described constant-current circuit is Buck circuit, Boost circuit, Buck-Boost circuit, Flyback circuit, Forword circuit, bridge circuit, push-pull circuit or LLC resonant circuit.
Preferably, each led module comprises detection and change-over circuit, constant-current circuit, a N LED branch road and N control switch; N is a positive integer;
Each LED branch road two ends control switch in parallel;
The color of the LED lamp in each LED branch road is identical;
N in each led module LED branch road is cascaded, and the anode of the LED branch road after the series connection connects the positive output end of constant-current circuit, and negative electrode connects negative output terminal;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal sends to constant-current circuit; Perhaps, give each control switch with described regulating command transmit button signal;
Constant-current circuit is used for providing constant current according to described control signal for the LED branch road after connecting.
Preferably, each led module comprises detection and change-over circuit, a N LED branch road, a N current-limiting circuit, a N current-limiting control circuit; N is a positive integer;
Each LED branch road is connected with a current-limiting circuit, the corresponding current-limiting control circuit of each current-limiting circuit;
All LED branch roads are connected in parallel on the two ends of DC bus-bar voltage;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal corresponding sends to each current-limiting control circuit respectively;
Current-limiting control circuit, the electric current of this LED branch road that is used to sample according to described control signal control current-limiting circuit, is regulated the electric current of this LED branch road.
Preferably, each described current-limiting circuit comprises adjusts pipe and sampling resistor,
Described adjustment pipe, sampling resistor and LED series connection;
The common port of described adjustment pipe and sampling resistor is connected an input of described current-limiting control circuit;
The output of current-limiting control circuit connects the control end of adjusting pipe.
Preferably, each led module also comprises a LED branch road, is connected the voltage changer output after described N the LED branch road parallel connection with after this LED branch road is connected.
Compared with prior art, the utlity model has following advantage:
The LED light adjusting system that the utility model provides comprises: centralized driving module, at least one led module, each led module comprise at least one paths of LEDs branch road; The input of centralized driving module connects power supply, and the centralized driving module receives the control signal that characterizes regulating command, is used to export DC bus-bar voltage and gives each led module, and DC bus-bar voltage is carried described regulating command; Each led module is used to detect the regulating command that DC bus-bar voltage is carried, and regulates the electric current of the LED branch road in this led module according to regulating command.The LED light adjusting system that the utility model provides only uses a centralized driving module, and is simple in structure, and control is convenient, and therefore, the cost of whole system is lower.
Description of drawings
Fig. 1 is the light adjusting system of LED illuminating lamp in the prior art;
Fig. 2 is that the LED that the utility model provides concentrates light adjusting system embodiment one structure chart;
Fig. 3 is the example structure figure of the centralized driving module that provides of the utility model;
Fig. 4 is another example structure figure of the centralized driving module that provides of the utility model;
Fig. 5 is regulating command embodiment one schematic diagram that the utility model provides;
Fig. 6 is the another embodiment schematic diagram of regulating command that the utility model provides;
Fig. 7 is another example structure figure of the LED light adjusting system that provides of the utility model;
Fig. 8 is the example structure figure of the led module that provides of the utility model;
Fig. 9 is the another example structure figure of the LED light adjusting system that provides of the utility model;
Figure 10 is the another example structure figure of the led module that provides of the utility model;
Figure 11 is another example structure figure of the led module that provides of the utility model.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.
Referring to Fig. 2, this figure is that the LED that the utility model provides concentrates light adjusting system embodiment one structure chart.
The LED light adjusting system that the utility model embodiment provides comprises: centralized driving module 201, at least one led module, each led module comprise at least one paths of LEDs branch road;
As shown in Figure 2, all led module parallel connections only show first led module 202 and n led module 203 among Fig. 2.
The input of centralized driving module 201 connects power supply Vin, and centralized driving module 201 receives the control signal that characterizes regulating command, is used to export DC bus-bar voltage V1 and gives described each led module power supply, and described DC bus-bar voltage V1 carries described regulating command;
Need to prove that Vin can be alternating voltage, also can be direct voltage; When Vin was alternating voltage, centralized driving module 201 also had the function of rectification.
Described each led module is used to detect the described regulating command that described DC bus-bar voltage V1 carries, and regulates the electric current of the LED branch road in this led module according to described regulating command.
The LED light adjusting system that the utility model provides comprises: centralized driving module, at least one led module, each led module comprise at least one paths of LEDs branch road; The input of centralized driving module connects power supply, and the centralized driving module receives the control signal that characterizes regulating command, is used to export DC bus-bar voltage and gives each led module, and DC bus-bar voltage is carried described regulating command; Each led module is used to detect the regulating command that DC bus-bar voltage is carried, and regulates the electric current of the LED branch road in this led module according to regulating command.The LED light adjusting system that the utility model provides only uses a centralized driving module, and is simple in structure, and control is convenient, and therefore, the cost of whole system is lower.
Referring to Fig. 3, this figure is the example structure figure of the centralized driving module that provides of the utility model.
The centralized driving module that present embodiment provides comprises: voltage changer 201a and output voltage controlling circuit 201b;
Described output voltage controlling circuit 201b, the control signal V2 that is used to detect described DC bus-bar voltage V1 and receives described sign regulating command generates the adjusting control signal and exports to voltage changer 201a;
The input of described voltage changer 201a connects power supply Vin, is used for giving each led module according to regulating control signal output DC bus-bar voltage V1.
The control signal V2 of described sign regulating command can be the signal from light-control knob device or remote controller generation, perhaps the standard interface signal of light adjusting system such as DALI, DMX.
Introduce the specific implementation of output voltage controlling circuit 201b below in conjunction with Fig. 4, referring to Fig. 4, this figure is another example structure figure of the centralized driving module that provides of the utility model.
Described output voltage controlling circuit 201b comprises integrated transporting discharging IC, the first divider resistance R1, the second divider resistance R2, the 3rd resistance R 3 and compensating network;
The negative input end of described comparator IC connects the output negative terminal of voltage changer 201a by the output plus terminal of first divider resistance R1 connection voltage changer 201a by the second divider resistance R2;
The negative input end of described integrated transporting discharging IC connects the control signal V2 of described characterization control instruction by the 3rd resistance R 3;
The positive input terminal of described integrated transporting discharging IC connects reference voltage V ref;
The output of described integrated transporting discharging IC connects described voltage changer 201a as the output of this output voltage controlling circuit 201b;
Be connected with described compensating network between the negative input end of described integrated transporting discharging IC and the output.
Described regulating command can be the amplitude or the AC ripple voltage of DC bus-bar voltage;
When described regulating command is the amplitude of DC bus-bar voltage, the different regulating command of different amplitude size representatives of described DC bus-bar voltage;
When described regulating command was AC ripple voltage, at least a characteristic parameter of described AC ripple voltage was represented regulating command.
The characteristic parameter of AC ripple voltage can be for the amplitude of AC ripple voltage, peak-to-peak value, frequency, duty ratio, high voltage time, low-voltage time etc. at least a.
Regulating command can be encoded the different different regulating commands of coding representative according to predetermined coding rule.
Described AC ripple voltage can be pulse signal, sinusoidal signal, triangular signal or trapezoidal signal etc.
Specify the implementation that regulating command is respectively the characteristic parameter of the amplitude of DC bus-bar voltage or AC ripple voltage below in conjunction with Fig. 5 and Fig. 6.
Referring to Fig. 5, this figure is regulating command embodiment one schematic diagram that the utility model provides.
The amplitude that shown in Figure 5 is by DC bus-bar voltage detects regulating command.
Specific implementation can for: the amplitude of the control signal V2 by change characterizing regulating command changes the amplitude of DC bus-bar voltage V1, thereby transmits regulating command to led module.
Need to prove that regulating command can comprise light modulation instruction and toning instruction, also can include only wherein a kind of.Wherein light modulation refers to adjusting brightness, and toning refers to the adjusting color.
The amplitude of hypothesis DC bus-bar voltage V1 both can have been transmitted the regulating command of regulating brightness now, can transmit the regulating command of regulating color again.
The amplitude excursion of DC bus-bar voltage V1 can be divided into different subintervals, the different different regulating commands of subinterval representative.
For example, the scope that V1 can be changed is divided into two subintervals, and the type of a regulating command is represented in each subinterval.
As shown in Figure 5, the amplitude excursion of V1 is that (300V, 400V), it is divided into first subinterval, and (300V is 350V) with second subinterval (350V, 400V) two intervals.(300V is 350V) for regulating the interval of color to set first subinterval; (350V is 400V) for regulating the interval of brightness in second subinterval; Perhaps (300V is 350V) for regulating the interval of brightness in first subinterval; (350V is 400V) for regulating the interval of color in second subinterval.
Be understandable that subinterval number and each subinterval length that V1 amplitude excursion is set can be set according to actual needs, not specifically restriction in the present embodiment.
In the interval of brightness is regulated in representative, can continue to divide a plurality of intervals, a brightness degree is represented in each interval; In the interval of color is regulated in representative, can continue to divide a plurality of intervals, a kind of color of each interval representative.
If be used for single light modulation or tinting system, then the amplitude of DC bus-bar voltage V1 only is used for transmitting single light modulation instruction or toning instruction, and its method and Fig. 5 are described similar for example.
Transmit the implementation of regulating command below in conjunction with Fig. 6 explanation stack AC ripple voltage on DC bus-bar voltage.
Referring to Fig. 6, this figure is the another embodiment schematic diagram of regulating command that the utility model provides.
Characteristic parameter by AC ripple voltage in the present embodiment transmits regulating command.
Characteristic parameter with AC ripple voltage had both transmitted the regulating command of regulating brightness below, and transmitting the regulating command of regulating color again is that example is introduced.
For example, two characteristic parameters of the AC ripple voltage of the stack on the DC bus-bar voltage V1 transmit respectively to be regulated color and regulates brightness, for example sets the Frequency Transfer of AC ripple voltage and regulates color; Brightness is regulated in the duty ratio transmission of AC ripple voltage.
The lamp of the corresponding a kind of color of each Frequency point of AC ripple voltage or frequency band.In led module, set the current value of each LED branch road of every kind of color correspondence in advance.Led module detects after the frequency of the AC ripple voltage that superposes on the DC bus-bar voltage, searches the current value of each LED branch road of this frequency correspondence, thereby the current value of correspondence is provided for each LED branch road.
Another, the different brightness of the corresponding LED lamp of the different duty of AC ripple voltage.In led module, set the current value of the different brightness correspondences of LED lamp in advance, led module detects after the duty ratio of AC ripple voltage of DC bus-bar voltage stack, search the current value of each LED branch road of this duty ratio correspondence, thereby the current value of correspondence is provided for each LED branch road.
As shown in Figure 6, only show the oscillogram of V2 and V1, wherein V2 is an impulse wave, and V1 is the DC bus-bar voltage of AC ripple signal of having superposeed.As can be seen from Figure 6, the duty ratio of the first regulating command correspondence is bigger than the duty ratio of second regulating command.
If be used for single light modulation or tinting system, any one characteristic parameter of AC ripple voltage only is used for transmitting the single toning or the regulating command of light modulation, and its method and Fig. 6 are described similar for example.
Introduce led module in the LED light adjusting system that the utility model provides in detail below in conjunction with accompanying drawing.
Referring to Fig. 7, this figure is another example structure figure of the LED light adjusting system that provides of the utility model.
Each led module that present embodiment provides comprises detection and change-over circuit and N LED branch road; N is a positive integer;
As shown in Figure 7, only showing two led modules wherein, is respectively first led module 202, a n led module 203.Each led module comprises three LED branch roads.
The color of the LED lamp in each LED branch road is identical, the corresponding constant-current circuit of each LED branch road; As shown in Figure 7, comprise three LED branch roads in first led module 202, represent with A1, A2 and A3 respectively.Comprise three LED branch roads in n the led module 203, represent with A4, A5 and A6 respectively.
Described detection and change-over circuit are used for detecting the regulating command that DC bus-bar voltage is carried, and described regulating command is converted to control signal corresponding sends to each constant-current circuit respectively.
As shown in Figure 7, the input of first detection and change-over circuit 202a connects DC bus-bar voltage V1, and output connects the control end of each constant-current circuit respectively.N detects and the input of change-over circuit 203a connects DC bus-bar voltage V1, and output connects the control end of each constant-current circuit respectively.
Described constant-current circuit is used for providing stable electric current according to described control signal for the LED branch road of correspondence.
Described constant-current circuit can be Buck circuit, Boost circuit, Buck-Boost circuit, Flyback circuit, Forword circuit, bridge circuit, push-pull circuit or LLC resonant circuit.
As can be seen from Figure 7, corresponding constant-current circuit of each the LED branch road in each led module.
Need to prove that each led module can comprise at least one LED branch road, the above LED branch road of two-way can be the lamp with a kind of color, also can be the lamp of different colours; The color of the LED branch road in the different LED module can be identical or different.
Introduce the specific embodiment of Fig. 7 correspondence below in conjunction with Fig. 8.
Referring to Fig. 8, this figure is the example structure figure of the led module that provides of the utility model.
Only showing the internal structure of a led module among Fig. 8, is a specific embodiment of Fig. 7 correspondence.Because the internal structure of each led module among Fig. 7 is identical, therefore, be that first led module among Fig. 7 is that example is introduced with the led module among Fig. 8.
Constant-current circuit in the present embodiment specifically can be realized by the DC/DC circuit, specifically be realized by the Buck circuit.
The output of detection and change-over circuit 202a connects the control circuit in each DC/DC circuit, and the output of control circuit connects switching tube S2, by the closed and disconnected of control S2, is set point thereby make the output current of Buck circuit.
When transmitting regulating command by the amplitude of DC bus-bar voltage, described detection and change-over circuit 202a detect the amplitude of DC bus-bar voltage, and be converted to the control signal of controlling the DC/DC circuit, and realize control to every paths of LEDs branch current, thus the color and the brightness of control led module integral body.
When the AC ripple voltage by DC bus-bar voltage transmits regulating command, described detection and change-over circuit 202a detect the characteristic parameter of AC ripple voltage, and be converted to the control signal of control DC/DC circuit, realization is to the control of every paths of LEDs branch current, thus the color and the brightness of control led module integral body.
Introduce the another kind of led module that the utility model embodiment provides below, referring to Fig. 9, this figure is the another example structure figure of the LED light adjusting system that provides of the utility model.
Each led module that present embodiment provides comprises detection and change-over circuit, constant-current circuit, a N LED branch road and N control switch; N is a positive integer;
Each LED branch road two ends control switch in parallel;
N in each led module LED branch road is cascaded, and the anode of the LED branch road after the series connection connects the positive output end of constant-current circuit, and negative electrode connects negative output terminal;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal sends to constant-current circuit; Perhaps, give each control switch with described regulating command transmit button signal;
Constant-current circuit is used for providing constant current according to described control signal for the LED branch road after connecting.
First led module 202 as shown in Figure 9 comprises three LED branch roads, is respectively R, G and B, and the color of the LED lamp in each LED branch road is identical.Wherein the LED lamp of R string is that the LED lamp red, that G goes here and there is yellow for LED lamp green, the B string.
R string LED lamp is in parallel with the first control switch Sr1; G string LED lamp is in parallel with the second control switch Sr2; R string LED lamp is in parallel with the 3rd control switch Sr3;
Constant-current circuit can be the circuit of non-isolation type, as Buck, and Boost, or circuit such as Buck-Boost; Can be the circuit of isolated form also, as Flyback, Forword, bridge circuit, push-pull circuit, or LLC class resonant circuit etc.
Detect and change-over circuit, detect the characteristic parameter of the regulating command of carrying of DC bus-bar voltage, give control switch Sr1, Sr2, Sr3 and constant-current circuit according to predefined characteristic parameter coding rule output control signal.
Detection and change-over circuit can be controlled the current amplitude of its output, the total brightness of promptly regulating led module by the control constant-current circuit; Can be by the closed and disconnected of control control switch Sr1, Sr2, Sr3, control the duty ratio between the electric current of R string LED lamp, G string LED lamp, B string LED lamp indirectly.
The total brightness that detection and change-over circuit are regulated led module by the mean value of control led module total current.
Detection and change-over circuit are by controlling the closed and disconnected of control switch Sr1, Sr2, Sr3 respectively, control the duty ratio between the electric current of R string LED lamp, G string LED lamp, B string LED lamp respectively, thereby the current average of controlling the lamp of every kind of color is regulated the integral color of led module.
Need to prove that present embodiment is to comprise R, G and B three string LED lamp, i.e. three LED branch roads in the led module; Can also be: two or more LED branch roads, in the same led module, different LED branch roads can be the lamp with a kind of color, also can be the lamp of different colours; The color of the LED branch road in the different LED module can be identical or different.
Referring to Figure 10, this figure is the another example structure figure of the led module that provides of the utility model.
Shown in Figure 10 is the cut-away view of first led module, because the structure of each led module is identical, therefore, is that example is introduced with first led module only.
The constant-current circuit that Figure 10 provides adopts the Buck circuit of non-isolation type to realize.
Referring to Figure 11, this figure is another example structure figure of the led module that provides of the utility model.
Each led module comprises detection and change-over circuit, a N LED branch road, a N current-limiting circuit, a N current-limiting control circuit; N is a positive integer;
Each LED branch road is connected with a current-limiting circuit, the corresponding current-limiting control circuit of each current-limiting circuit;
All LED branch roads are connected in parallel on the two ends of DC bus-bar voltage;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal corresponding sends to each current-limiting control circuit respectively;
Current-limiting control circuit, the electric current of this LED branch road that is used to sample according to described control signal control current-limiting circuit, is regulated the electric current of this LED branch road.
As shown in figure 11, be that example is introduced with three LED branch roads, be respectively R branch road, G branch road and B branch road.The corresponding a kind of color of each branch road.
The structure chart of each LED branch road is similarly, is that example is introduced with the R branch road only below.
Current-limiting control circuit 202b gathers the electric current of R branch road, specifically can realize by sampling resistor Rs1, receive the control signal Iset1 of detection and change-over circuit 202a simultaneously, the electric current and the Iset1 that gather are compared, the resistance sizes of pipe S1 is adjusted in the control of output control signal, thus the electric current of control R branch road.
As shown in figure 11, current-limiting circuit 202c comprises adjustment pipe S1 and sampling resistor Rs1,
Described adjustment pipe S1, sampling resistor Rs1 and LED series connection;
The common port of described adjustment pipe S1 and sampling resistor Rs1 is connected the input of described current-limiting control circuit 202b;
The output of current-limiting control circuit 202b connects the control end of adjusting pipe S1.
Need to prove that each led module can also comprise a LED branch road, be connected the voltage changer output after described N the LED branch road parallel connection with after this LED branch road is connected.
As shown in figure 11, connect with the W branch road after the R branch road in first led module 202, G branch road and the parallel connection of B branch road.
The LED light adjusting system that the above embodiment of the utility model provides uses a concentrated light-adjusting module to make whole system realize higher power factor in grid side, thereby can reduce electromagnetic interference.
The above only is preferred embodiment of the present utility model, is not the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solutions of the utility model, all still belongs in the scope of technical solutions of the utility model protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.
Claims (10)
1. a LED light adjusting system is characterized in that, comprising: centralized driving module, at least one led module, each led module comprise at least one paths of LEDs branch road;
The input of described centralized driving module connects power supply, and described centralized driving module is used to receive the control signal that characterizes regulating command, and the output DC bus-bar voltage is given described each led module, and described DC bus-bar voltage is carried described regulating command;
Described each led module is used to detect the described regulating command that described DC bus-bar voltage is carried, and regulates the electric current of the LED branch road in this led module according to described regulating command.
2. LED light adjusting system according to claim 1 is characterized in that, described regulating command is the amplitude or the AC ripple voltage of DC bus-bar voltage;
When described regulating command is the amplitude of DC bus-bar voltage, the different regulating command of different amplitude size representatives of described DC bus-bar voltage;
When described regulating command was AC ripple voltage, at least a characteristic parameter of described AC ripple voltage was represented regulating command.
3. LED light adjusting system according to claim 1 and 2 is characterized in that, described centralized driving module comprises: voltage changer and output voltage controlling circuit;
Described output voltage controlling circuit is used to detect described DC bus-bar voltage and receives the control signal that described characterization control is instructed, and generates the adjusting control signal and exports to voltage changer;
The input of described voltage changer connects power supply, is used for giving each led module according to regulating control signal output DC bus-bar voltage.
4. LED light adjusting system according to claim 3 is characterized in that, described output voltage controlling circuit comprises integrated transporting discharging, first divider resistance, second divider resistance, the 3rd resistance and compensating network;
The negative input end of described integrated transporting discharging connects the output negative terminal of voltage changer by the output plus terminal of first divider resistance connection voltage changer by second divider resistance;
The negative input end of described integrated transporting discharging connects the control signal of described characterization control instruction by the 3rd resistance;
The positive input terminal of described integrated transporting discharging connects reference voltage;
The output of described integrated transporting discharging connects described voltage changer as the output of this output voltage controlling circuit;
Be connected with described compensating network between the negative input end of described integrated transporting discharging and the output.
5. LED light adjusting system according to claim 1 is characterized in that, described each led module comprises detection and change-over circuit and N LED branch road; N is a positive integer;
The color of the LED lamp in each LED branch road is identical, the corresponding constant-current circuit of each LED branch road;
Described detection and change-over circuit are used for detecting the regulating command that DC bus-bar voltage is carried, and described regulating command is converted to control signal corresponding sends to each constant-current circuit respectively;
Described constant-current circuit is used for providing constant electric current according to described control signal for the LED branch road of correspondence.
6. light adjusting system according to claim 5 is characterized in that, described constant-current circuit is Buck circuit, Boost circuit, Buck-Boost circuit, Flyback circuit, Forword circuit, bridge circuit, push-pull circuit or LLC resonant circuit.
7. light adjusting system according to claim 1 is characterized in that, each led module comprises detection and change-over circuit, constant-current circuit, a N LED branch road and N control switch; N is a positive integer;
Each LED branch road two ends control switch in parallel;
The color of the LED lamp in each LED branch road is identical;
N in each led module LED branch road is cascaded, and the anode of the LED branch road after the series connection connects the positive output end of constant-current circuit, and negative electrode connects negative output terminal;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal sends to constant-current circuit; Perhaps, give each control switch with described regulating command transmit button signal;
Constant-current circuit is used for providing constant current according to described control signal for the LED branch road after connecting.
8. light adjusting system according to claim 1 is characterized in that, each led module comprises detection and change-over circuit, a N LED branch road, a N current-limiting circuit, a N current-limiting control circuit; N is a positive integer;
Each LED branch road is connected with a current-limiting circuit, the corresponding current-limiting control circuit of each current-limiting circuit;
All LED branch roads are connected in parallel on the two ends of DC bus-bar voltage;
Detect and change-over circuit, be used for detecting the regulating command that DC bus-bar voltage is carried, described regulating command is converted to control signal corresponding sends to each current-limiting control circuit respectively;
Current-limiting control circuit, the electric current of this LED branch road that is used to sample according to described control signal control current-limiting circuit, is regulated the electric current of this LED branch road.
9. light adjusting system according to claim 8 is characterized in that, each described current-limiting circuit comprises adjusts pipe and sampling resistor,
Described adjustment pipe, sampling resistor and LED series connection;
The common port of described adjustment pipe and sampling resistor is connected an input of described current-limiting control circuit;
The output of current-limiting control circuit connects the control end of adjusting pipe.
10. according to Claim 8 or 9 described light adjusting systems, it is characterized in that each led module also comprises a LED branch road, be connected the voltage changer output after described N the LED branch road parallel connection with after this LED branch road is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206815249U CN201928489U (en) | 2010-12-27 | 2010-12-27 | Light-emitting diode (LED) dimming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206815249U CN201928489U (en) | 2010-12-27 | 2010-12-27 | Light-emitting diode (LED) dimming system |
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| Publication Number | Publication Date |
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| CN201928489U true CN201928489U (en) | 2011-08-10 |
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| CN2010206815249U Expired - Lifetime CN201928489U (en) | 2010-12-27 | 2010-12-27 | Light-emitting diode (LED) dimming system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548101A (en) * | 2010-12-27 | 2012-07-04 | 英飞特电子（杭州）有限公司 | LED dimming system |
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2010
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548101A (en) * | 2010-12-27 | 2012-07-04 | 英飞特电子（杭州）有限公司 | LED dimming system |
| WO2012088920A1 (en) * | 2010-12-27 | 2012-07-05 | 英飞特电子（杭州）有限公司 | Led dimming system |
| CN102548101B (en) * | 2010-12-27 | 2014-05-28 | 英飞特电子（杭州）股份有限公司 | LED dimming system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Patentee after: LED One (Hangzhou) Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Patentee before: Inventronics (Hangzhou) Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110810 Effective date of abandoning: 20140528 |
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| RGAV | Abandon patent right to avoid regrant |