CN201813591U - Wireless drive system for LED (light emitting diode) - Google Patents
Wireless drive system for LED (light emitting diode) Download PDFInfo
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- CN201813591U CN201813591U CN2010202119421U CN201020211942U CN201813591U CN 201813591 U CN201813591 U CN 201813591U CN 2010202119421 U CN2010202119421 U CN 2010202119421U CN 201020211942 U CN201020211942 U CN 201020211942U CN 201813591 U CN201813591 U CN 201813591U
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Abstract
The utility model discloses a wireless drive system for an LED (light emitting diode), which comprises an upper computer, a wireless communication module and at least one path of LED drive module, wherein each path of LED drive module is connected with an LED light source; the upper computer is used for wirelessly transmitting a dimming control signal to the designated LED drive module through the wireless communication module; the LED drive module comprises a singlechip, a current sampling unit and an LED drive source, wherein the singlechip is used for receiving the dimming control signal and converting into corresponding PWM (pulse-width modulation) waveform; the current sampling unit is used for receiving the sampling current fed back by the LED light source; the LED drive source is combined with the sampling current according to the change of the PWM waveform and adjusts drive current output to the LED light source; and the wireless communication module is used for realizing the wireless communication between the upper computer and the singlechip. By adopting the embodiment of the utility model, the power supply drive for the LED light source can be wirelessly realized.
Description
Technical Field
The utility model relates to a light emitting diode technical field especially relates to a wireless actuating system of light emitting diode.
Background
At present, electric power energy in China is relatively short, the storage of coal resources is limited, and the phenomenon of power supply shortage easily occurs in many areas during the peak period of power utilization. The lighting power consumption accounts for 20% of the power consumption in China, so that the power resource can be effectively saved by doing energy-saving work in the aspect of lighting power consumption.
An LED (Light Emitting Diode) is a semiconductor device that can directly convert electricity into visible Light. LEDs were first applied to the display of indicator lights, numbers and text. With the advent of white LEDs, LEDs have additionally been provided with a low operating voltage. The LED light source has the advantages of low power consumption, high luminous efficiency and long service life, and the LED light source is more and more widely applied to the field of general illumination. The LED light source is an energy-saving and environment-friendly light-emitting device, and compared with the traditional light source, the LED lamp saves 80% of electricity compared with an incandescent lamp and 50% of electricity compared with a fluorescent lamp.
The existing LED driving power supply generally adopts a wired control mode. In the existing LED wired driving power supply, a large number of metal cables need to be arranged, so that the arrangement of an LED light source has large limitation, inflexibility, poor expandability and more complex maintenance. Meanwhile, the aging and the scrapping of the metal cable can pollute the environment, and have great potential safety hazards to human life.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide a wireless driving system for light emitting diodes, which can drive the power of the LED light source in a wireless manner.
The embodiment of the utility model provides a wireless actuating system of emitting diode, the system includes: the system comprises an upper computer, a wireless communication module and at least one path of LED driving module; each path of LED driving module is connected with an LED light source;
the upper computer is used for sending the dimming control signal to the appointed LED driving module in a wireless mode through the wireless communication module;
the LED driving module includes: the LED driving circuit comprises a singlechip, a current sampling unit and an LED driving power supply;
the single chip microcomputer is used for receiving the dimming control signal, converting the dimming control signal into a corresponding PWM waveform and outputting the PWM waveform to the LED driving power supply;
the current sampling unit is used for receiving the sampling current fed back by the LED light source and outputting the sampling current to the LED driving power supply;
the LED driving power supply is used for regulating the driving current output to the LED light source according to the change of the PWM waveform and by combining the sampling current;
the wireless communication module is used for realizing wireless communication between the upper computer and the singlechip.
Preferably, the LED driving power supply includes: the device comprises a filter rectification circuit, a PFC correction circuit, a double-tube forward circuit and a constant current control circuit;
the filter rectification circuit is used for carrying out high-frequency filtering and rectification on the received input alternating-current voltage and outputting full waves to the PFC correction circuit;
the PFC correction circuit is used for carrying out power factor correction on the received full wave and outputting stable direct-current bus voltage to the double-tube forward circuit;
the constant current control circuit is used for receiving the PWM waveform and the sampling current, determining the magnitude of a reference current according to the PWM waveform, comparing the reference current with the sampling current, and outputting a constant current control signal to the double-tube forward excitation unit through an operational amplifier;
the double-tube forward unit is used for converting the direct-current bus voltage received from the PFC correction circuit into the voltage required by driving the LED light source; and regulating the driving current output to the LED light source according to the constant current control signal.
Preferably, the wireless communication module is a ZigBee communication module;
the ZigBee communication module comprises: a coordinator, at least one router or terminal equipment; wherein,
the coordinator is connected with the upper computer and is used for receiving the dimming control signal and sending the dimming control signal to a router and/or terminal equipment appointed by the upper computer in a wireless mode;
and each router and/or terminal equipment is connected with one path of LED driving module and used for sending the received dimming control signal to the LED driving module connected with the router and/or terminal equipment.
Preferably, the first and second electrodes are formed of a metal,
the router is directly connected with the LED driving module;
or,
the router is connected with the LED driving module through lower-level equipment.
Preferably, the router is connected to at least one of the subordinate devices;
the lower level equipment is terminal equipment or a router.
Preferably, the ZigBee communication module realizes communication with the singlechip by adopting a serial port communication mode.
Preferably, the ZigBee communication module realizes communication with the upper computer in a serial port communication mode
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the embodiment of the utility model provides an among the wireless drive system, adopt wireless communication module to realize the wireless communication between host computer and the LED drive module, realize the wireless drive to the LED light source from this. Compared with the prior art, the LED light source has the advantages that metal cables do not need to be arranged, so that the arrangement of the LED light source has great flexibility and better expandability; maintenance work on the metal cable is also omitted, so that the LED light source is relatively simple and convenient to maintain; meanwhile, the problem that potential safety hazards are brought to human life due to environmental pollution caused by aging and scrapping of metal cables is solved.
Drawings
Fig. 1 is a structural diagram of a wireless driving system of a light emitting diode according to an embodiment of the present invention. (ii) a
Fig. 2 is a structural diagram of an LED driving module according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a constant current control circuit according to an embodiment of the present invention;
fig. 4 is a control circuit diagram of a dual-transistor forward circuit according to an embodiment of the present invention;
fig. 5 is an overall circuit diagram of the driving power supply according to the embodiment of the present invention;
fig. 6 is a structural diagram of a wireless communication module according to an embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
In view of this, an object of the present invention is to provide a wireless driving system for light emitting diodes, which can drive the power of the LED light source in a wireless manner.
Referring to fig. 1, it is a structural diagram of a wireless driving system of a light emitting diode according to an embodiment of the present invention. The system comprises: the LED driving system comprises an upper computer 1, a wireless communication module 2 and at least one path of LED driving module 3.
The upper computer 1 is used for sending the dimming control signal to the appointed LED driving module 3 in a wireless mode through the wireless communication module 2.
Each path of the LED driving module 3 is connected to one LED light source 4, and is configured to output a corresponding constant current control signal according to the received dimming control signal, and adjust the brightness of the LED light source 4 connected thereto, thereby implementing dimming control on the LED light source.
Specifically, when the dimming control signal output by the upper computer changes, the PWM waveform also changes. The LED driving module 30 adjusts the output constant current control signal according to the change of the PWM waveform, so as to adjust the brightness of the LED light source 4 connected thereto, thereby implementing dimming control of the LED light source 4.
It should be noted that each path of the LED driving module 3 has the same structure, and includes a single chip 31, a current sampling unit 32, and an LED driving power supply 33.
The single chip microcomputer 31 is connected to the wireless communication module 2, and is configured to receive the dimming control signal, convert the dimming control signal into a corresponding PWM waveform, and output the PWM waveform to the LED driving power supply 33.
The current sampling unit 32 is connected to the LED light source 4, and is configured to receive the sampling current fed back by the LED light source 4 and output the sampling current to the LED driving power supply 33.
The LED driving power supply 33 is configured to adjust a driving current output to the LED light source 4 connected to the LED driving power supply to change in combination with the sampling current according to a change in the PWM waveform output by the single chip microcomputer 31, so as to adjust the brightness of the LED light source 4, thereby implementing dimming control on the LED light source 4.
The wireless communication module 2 is used for realizing wireless communication between the upper computer 1 and the singlechip 3.
The embodiment of the utility model provides an in, adopt wireless communication module to realize the wireless communication between host computer and the LED drive module, realize the wireless drive to the LED light source from this. Compared with the prior art, the LED light source has the advantages that metal cables do not need to be arranged, so that the arrangement of the LED light source has great flexibility and better expandability; maintenance work on the metal cable is also omitted, so that the LED light source is relatively simple and convenient to maintain; meanwhile, the problem that potential safety hazards are brought to human life due to environmental pollution caused by aging and scrapping of metal cables is solved.
Specifically, as shown in fig. 2, the structure diagram of the LED driving module according to the embodiment of the present invention is shown. The LED driving module includes: a single chip microcomputer 31, a current sampling unit 32, and an LED driving power supply 33.
Wherein the LED driving power supply 33 includes: a filter rectifying circuit 331, a PFC correcting circuit 332, a double-tube forward circuit 333 and a constant current control circuit 334.
The filter rectification circuit 331 is configured to perform high-frequency filtering and rectification on the received input ac voltage, and output a full wave to the PFC correction circuit 332.
Specifically, the filter rectification circuit 331 may be composed of an EMI (Electromagnetic Interference) filter circuit and a rectifier bridge.
The EMI filter circuit is used for carrying out high-frequency filtering on the received input alternating-current voltage, can filter high-frequency clutter in the input alternating-current voltage, inhibits the influence of high-frequency interference in an alternating-current power grid on equipment, and simultaneously inhibits the interference of the equipment on the alternating-current power grid. The rectifier bridge rectifies the input ac voltage filtered by the EMI filter circuit, and outputs a full wave to the PFC correction unit 332. Wherein, the input alternating voltage is generally 220V commercial power input.
The PFC correction circuit 332 is configured to perform power factor correction on the received full wave, and output a stable dc bus voltage to the dual-transistor forward circuit 333.
For the LED driving power supply, due to the nonlinearity of the electronic switch, the input current harmonic content of the interface circuit is high, and the grid-side power factor of the power electronic device is low. With the increasing of the power grid throwing capacity of power electronic systems, the influence of input current harmonics on a power grid is more and more serious. In order to limit distortion of input current and suppress harmonic content, international electrotechnical organization proposes a standard of harmonic suppression, and a power factor correction circuit is added into a power electronic device to enable grid-side current to be sinusoidal and keep the same phase with grid voltage.
Specifically, the embodiment of the utility model provides an among the LED drive power supply, adopt PFC correction circuit 332, improve drive power supply's power factor saves the reactive power loss, avoids some problems that third order harmonic current in the AC network caused. Specifically, the power factor of a general driving power supply without a PFC correction circuit is about 0.5-0.7, and the power factor of the driving power supply with the PFC correction circuit can reach more than 0.99.
The constant current control circuit 334 is configured to receive a PWM waveform output by the single chip microcomputer 31 and a sampling current output by the current sampling unit 32, determine a magnitude of a reference current according to the PWM waveform, compare the reference current with the sampling current, and output a constant current control signal to the double-transistor forward circuit 333 through the operational amplifier.
The two-transistor forward circuit 333 belongs to a DC/DC conversion circuit, and is configured to convert a DC bus voltage received from the PFC correction circuit 332 into a voltage required for driving the LED light source; meanwhile, the two-transistor forward unit 333 adjusts the magnitude of the driving current output to the LED light source 4 connected thereto according to the constant current control signal, so as to adjust the brightness of the LED light source 4, thereby implementing dimming control of the LED light source 4.
Referring to fig. 3, it is a circuit diagram of a constant current control circuit according to an embodiment of the present invention. The constant current control circuit 334 includes a second optical coupler chip U2 and at least one control branch. As shown in fig. 3, the constant current control circuit 334 according to the embodiment of the present invention may include multiple control branches, wherein each of the control branches is used to control the LED light source 4 all the way.
In fig. 3, a 4-way control branch is taken as an example for explanation, and in practical application, the number of branches included in the constant current control circuit 334 may be specifically set according to actual needs.
It should be noted that the circuit structure and the operation principle of the multiple branches included in the constant current control circuit 334 are the same. One of the branches will be described in detail.
As shown in fig. 3, the second optical coupler chip U2 is a TLP521 chip, and includes 4 pins, where pin 1 and pin 2 are light emitting sides, and pin 3 and pin 4 are light receiving sides. Pin 1 of the second optical coupler chip U2 is connected to the PWM waveform output by the single chip microcomputer 31 through a resistor R21, and pin 3 of the second optical coupler chip U2 is connected to the positive input end of the operational amplifier of each control branch. Therefore, the PWM waveform output by the single chip microcomputer 31 passes through the second optical coupler chip U2, and outputs the reference current to the positive input end of the operational amplifier of each control branch, so that the reference current input by the positive input end of each operational amplifier changes along with the change of the PWM waveform.
As shown in fig. 3, the branch of the operational amplifier U1A is taken as an example for explanation. The control branch comprises: the circuit comprises an operational amplifier U1A, a first resistor R5, a second resistor R6, a third resistor R7, a fourth resistor R8, a first capacitor C4, a second capacitor C5, a third capacitor C6 and a diode D1.
The positive input end of the operational amplifier U1A is connected with a reference current, the negative input end of the operational amplifier U1A is connected with the LED light source 4 connected with the control circuit through a first resistor R5, the sampling current returned by the LED light source 4 is received, and the negative input end of the operational amplifier U1A is grounded through a first capacitor C4; the output end of the operational amplifier U1A is connected to the cathode of the diode D1 through a fourth resistor R8, the anode of the diode D1 is connected to the output end of the constant current control circuit 334, and the constant current control signal is output to the two-transistor forward unit 333.
The second capacitor C5 is connected in series with a second resistor R6 and then is connected between the negative input end and the output end of the operational amplifier U1A; the third resistor R7 is connected between the negative input end and the output end of the operational amplifier U1A; the output terminal of the operational amplifier U1A is connected to ground through the third capacitor C6.
Specifically, the PWM waveform output by the single chip microcomputer 31 is connected to the input end of the second optical coupler chip U2 through a resistor R21, and the magnitude of the reference current input to the positive input end of the operational amplifier is changed through the second optical coupler chip U2, so that the operational amplifier outputs a constant current control signal to the two-transistor forward unit 333, and changes the magnitude of the driving current output to the LED light source 4.
Referring to fig. 4, a control circuit diagram of a dual-transistor forward circuit according to an embodiment of the present invention is shown.
The control circuit of the double-tube forward circuit 333 is realized by adopting a chip UC 3844. The UC3844 chip is a high-performance fixed-frequency current mode controller, and is configured to output a PWM pulse signal for controlling the switching transistor of the two-transistor forward circuit 333.
As shown in fig. 4, the UC3844 chip includes 8 pins. The function of each pin and the connection of peripheral circuits will be briefly described below.
Pin 1(COMP pin) is an error amplifier output and can be used for loop compensation, and pin 1 is connected with feedback voltage through a resistor R3 and a resistor R2;
pin 2(VFB pin) is the inverting input terminal of the error amplifier, and pin 2 is connected to the feedback voltage through resistor R2, and at the same time, connected to ground through resistor R2 and resistor R4, and capacitor C3 is connected in parallel between pin 2 and pin 1;
pin 3(C/S pin) is a sampling current input end, the pin 3 is connected to current sampling through a resistor R6, and meanwhile, the pin 3 is grounded through a capacitor C7, wherein the current sampling is a current sampling of a switching tube of the dual-tube forward circuit 333;
pin 4(RT/CT pin) is connected to pin 8(VREF pin) through resistor R5, to ground through capacitor C5, and capacitor C4 is connected between pin 4 and pin 3;
pin 5(GLD pin) is the common ground for the control circuit and the power supply;
a pin 6(OUT pin) is a PWM pulse output pin, and outputs a PWM pulse signal for driving the switching transistor of the two-transistor forward circuit 333 through a resistor R7;
pin 7(VCC pin) is connected with starting voltage, and pin 7 is grounded through capacitors C2 and CA 1;
pin 8(VREF pin) is a reference output, and provides a charging current to the capacitor C5 through the resistor R5, and the pin 8 is connected to the standard voltage +5V and is grounded through the capacitor C6. Referring to fig. 5, an overall circuit diagram of the driving power supply according to the embodiment of the present invention is shown. The drive power supply 33 includes: a filter rectifying circuit 331, a PFC correcting circuit 332, a double-tube forward circuit 333 and a constant current control circuit 334.
The constant current control circuit 334 shown in fig. 3 is connected to the driving power supply circuit diagram shown in fig. 5 through a connector J3; the control circuit of the two-transistor forward circuit 333 shown in fig. 4 is connected to the driving power supply circuit diagram shown in fig. 5 through a connector J1.
As shown in fig. 5, the constant current control signal output by the constant current control circuit 334 is input to pin 2 of the first optocoupler chip U1 shown in fig. 5 through the 5 th pin of the connector J3; the voltage output by the double-tube forward circuit 333 and used for driving the LED light source 4 is connected to pin 1 of the first optical coupler chip U1 through a resistor R33; and a pin 3 and a pin 4 of the first optical coupler chip U1 are respectively connected with a control chip of the double-tube forward circuit 333 through a pin 1 and a pin 2 of the connector J1.
The PWM control pulse output by the control circuit of the two-transistor forward circuit 333 is input to the two-transistor forward circuit 333 through the 4 th pin of the connector J1, so as to control the operations of the switching transistors Q2 and Q3 of the two-transistor forward circuit 333, thereby making the LED circuit in a constant voltage and constant current working state.
Specifically, the PWM signal output by the single chip microcomputer 31 changes the reference current at the positive input end of each operational amplifier in the constant current control circuit 334 through the second optical coupler chip U1 of the constant current control circuit 334, after the reference current and the sampling current are compared by the operational amplifier, the output constant current control signal is sent to the two-transistor forward circuit 333, and the switching speed of the switching tubes Q2 and Q3 is changed, thereby changing the driving current on the LED light source 4.
As is known in the art, the LED light source 4 is driven by a constant current, and when the driving current flowing through the LED power source 4 changes, the output brightness of the LED light source 4 changes, thereby adjusting the brightness of the LED light source 4.
The embodiment of the utility model provides an among the actuating system, adopt wireless communication module to realize the wireless communication between host computer and the LED drive module, realize the wireless drive to the LED light source from this.
Specifically, the wireless communication module 2 may be implemented by a ZigBee communication module. The ZigBee is a wireless communication technology with short distance, low power consumption, low transmission rate, low complexity and low cost, and is mainly used in the fields of industrial and household automatic intelligent control, sensing, monitoring, remote control and the like. ZigBee also has the advantage of large network capacity, and a ZigBee network can include 65535 network nodes at most. The ZigBee communication module can be embedded in the electronic equipment, and simultaneously supports the geographic positioning function.
Referring to fig. 6, it is a structure diagram of a wireless communication module according to an embodiment of the present invention. In fig. 6, the wireless communication module 2 is implemented by a ZigBee communication module. The wireless communication module 2 includes: a coordinator 21, at least one router 22 or a terminal device 23.
The coordinator 22 of the ZigBee communication module establishes a wireless network, and realizes wireless communication with the router 22 and/or the terminal device 23 through the wireless network.
The coordinator 21 is connected with the upper computer 1, and is configured to receive a dimming control signal sent by the upper computer 1, and send the dimming control signal to a router 22 and/or a terminal device 23 specified by the upper computer 1 in a wireless manner. Each of the routers 22 and/or the terminal devices 23 is connected to one of the LED driving modules 3, and configured to send the received dimming control signal to the LED driving module 3 connected thereto.
The embodiment of the utility model provides an in the zigBee communication module, only need a coordinator 21 can realize and host computer 1 between the communication.
After the coordinator 21 is powered on and initialized, it actively establishes a wireless network and waits for the joining of the router 22 and/or the terminal device 23. The coordinator 21 may enable wireless communication with the routers 22 and/or the terminal devices 23 participating in the wireless network through the wireless network.
Specifically, the ZigBee communication module may include a multi-way router 22 and/or a terminal device 23. Each router 22 and the terminal device 23 may be used to connect one LED driving module 3, so as to implement wireless control on one LED light source 4.
The terminal device 23 is a terminal node, and can only be directly connected to the LED driving module 3, and output the received dimming control signal to the LED driving module 3 connected thereto.
The router 22 may be directly connected to the LED driving module 3, or may be connected to the LED driving module 3 through a lower device, allowing the lower device to join a wireless network.
When the router 22 is directly connected to the LED driving module 3, the router 22 directly outputs the received dimming control signal to the LED driving module 3 connected thereto.
When the router 22 is connected to the LED driving module 3 through a lower device, the router 22 outputs the received dimming control signal to the LED driving module 3 connected thereto through the lower device.
Specifically, each router 22 may be connected to at least one subordinate device, and each subordinate device is connected to one LED driving module 3, so as to implement wireless control over one LED light source 4.
Specifically, the lower level device may be a terminal device, or may be a router. The router as the subordinate device has the same function as the superior router, and may be directly connected to the LED driving module 3, or may be connected to the LED driving module 3 through the subordinate device.
It should be noted that, in the system according to the embodiment of the present invention, the communication between the coordinator 21 of the ZigBee communication module and the router 22 and/or the terminal device 23 depends on a network number for identification.
Specifically, in the ZigBee communication module, when the router 22 or the terminal device 23 applies for joining a wireless network, the coordinator 21 correspondingly allocates a network number to each router 22 or terminal device 23 that is connected to the wireless network; for the subordinate devices of the router 22, when the subordinate devices of the router 22 apply for joining the wireless network, the coordinator 21 also assigns a network number to each of the subordinate devices of the router 22 joining the wireless network accordingly.
At this time, the dimming control signal transmitted by the upper computer 1 correspondingly includes information of the designated LED light source 4. The coordinator 21 identifies the dimming control signal received from the upper computer 1, determines which LED light source 4 is designated to be controlled by the dimming control signal, and sends the dimming control signal to the corresponding router 22 or terminal device 23 according to the network number of the router 22 or terminal device 23 corresponding to the LED light source 4.
Specifically, as can be seen from the above description, each router 22 or terminal device 23 is connected to one LED light source 4 through one LED driving module 3. Therefore, it can be said that each router 22 or terminal device 23 corresponds to one LED light source 4. A one-to-one correspondence between the network number of each router 22 or terminal device 23 and the LED light sources 4 respectively corresponding thereto is established and stored in the coordinator 21.
The coordinator 21 may determine a network number corresponding to the LED light source 4 according to the information of the LED light source 4 included in the dimming control signal and the correspondence, and identify the router 22 or the terminal device 23 corresponding to the network number.
It should be noted that, in the embodiment of the utility model, zigBee communication module adopts serial communication to follow host computer 1 receives the control signal that adjusts luminance, and will through wireless network the control signal that adjusts luminance is transmitted to LED drive module 3 with serial communication form, realizes the effect of adjusting luminance to LED light source 4.
The embodiment of the utility model provides an in, adopt zigBee communication module to realize the wireless communication between host computer and the LED drive module, realize the wireless control to the LED light source from this. Therefore, the advantages of low power consumption, flexible application and good expansibility of the ZigBee communication module are utilized, and the dimming control of the LED light source can be flexibly and simply realized.
It should be noted that, in the embodiment of the utility model provides an in, when carrying out serial communication, must guarantee the communication mode of zigBee communication module's serial ports and the serial ports of singlechip is unanimous, for example baud rate, frame format etc.. In the programming of the single chip microcomputer, a serial port communication module of the single chip microcomputer must be initialized firstly, the baud rate and the frame format of the single chip microcomputer are set, and meanwhile, the input and the output of an I/O port of the single chip microcomputer must be set.
The above has introduced the wireless driving system of the light emitting diode provided by the present invention in detail, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. A wireless driving system for light emitting diodes, the system comprising: the system comprises an upper computer, a wireless communication module and at least one path of LED driving module; each path of LED driving module is connected with an LED light source;
the upper computer is used for sending the dimming control signal to the appointed LED driving module in a wireless mode through the wireless communication module;
the LED driving module includes: the LED driving circuit comprises a singlechip, a current sampling unit and an LED driving power supply;
the single chip microcomputer is used for receiving the dimming control signal, converting the dimming control signal into a corresponding PWM waveform and outputting the PWM waveform to the LED driving power supply;
the current sampling unit is used for receiving the sampling current fed back by the LED light source and outputting the sampling current to the LED driving power supply;
the LED driving power supply is used for regulating the driving current output to the LED light source according to the change of the PWM waveform and by combining the sampling current;
the wireless communication module is used for realizing wireless communication between the upper computer and the singlechip.
2. The wireless driving system of the light emitting diode according to claim 1, wherein the LED driving power source comprises: the device comprises a filter rectification circuit, a PFC correction circuit, a double-tube forward circuit and a constant current control circuit;
the filter rectification circuit is used for carrying out high-frequency filtering and rectification on the received input alternating-current voltage and outputting full waves to the PFC correction circuit;
the PFC correction circuit is used for carrying out power factor correction on the received full wave and outputting stable direct-current bus voltage to the double-tube forward circuit;
the constant current control circuit is used for receiving the PWM waveform and the sampling current, determining the magnitude of a reference current according to the PWM waveform, comparing the reference current with the sampling current, and outputting a constant current control signal to the double-tube forward excitation unit through an operational amplifier;
the double-tube forward unit is used for converting the direct-current bus voltage received from the PFC correction circuit into the voltage required by driving the LED light source; and regulating the driving current output to the LED light source according to the constant current control signal.
3. The wireless driving system of the light emitting diode of claim 1, wherein the wireless communication module is a ZigBee communication module;
the ZigBee communication module comprises: a coordinator, at least one router or terminal equipment; wherein,
the coordinator is connected with the upper computer and is used for receiving the dimming control signal and sending the dimming control signal to a router and/or terminal equipment appointed by the upper computer in a wireless mode;
and each router and/or terminal equipment is connected with one path of LED driving module and used for sending the received dimming control signal to the LED driving module connected with the router and/or terminal equipment.
4. The wireless driving system of light emitting diodes according to claim 3,
the router is directly connected with the LED driving module;
or,
the router is connected with the LED driving module through lower-level equipment.
5. The wireless driving system for the LED of claim 4, wherein the router is connected to at least one of the subordinate devices;
the lower level equipment is terminal equipment or a router.
6. The wireless driving system of the light emitting diode of claim 3, wherein the ZigBee communication module is in a serial port communication mode to realize communication with the single chip microcomputer.
7. The wireless driving system of the light emitting diode of claim 3, wherein the ZigBee communication module realizes communication with the upper computer in a serial port communication mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202119421U CN201813591U (en) | 2010-06-02 | 2010-06-02 | Wireless drive system for LED (light emitting diode) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202119421U CN201813591U (en) | 2010-06-02 | 2010-06-02 | Wireless drive system for LED (light emitting diode) |
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| CN201813591U true CN201813591U (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202119421U Expired - Lifetime CN201813591U (en) | 2010-06-02 | 2010-06-02 | Wireless drive system for LED (light emitting diode) |
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| CN (1) | CN201813591U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917793A (en) * | 2010-06-02 | 2010-12-15 | 杭州奥能照明电器有限公司 | Wireless driving system of light-emitting diode |
| CN102291901A (en) * | 2011-09-23 | 2011-12-21 | 青岛海信电器股份有限公司 | Driving circuit and driving device for light emitting diode (LED) array |
| CN102695334A (en) * | 2012-05-11 | 2012-09-26 | 华南理工大学 | Intelligent light modulation apparatus for LED concentrated direct current power supply system |
| CN103874300A (en) * | 2014-03-31 | 2014-06-18 | 太仓电威光电有限公司 | Method and system for adjusting parameters of output end of LED drive |
| CN103906322A (en) * | 2014-03-26 | 2014-07-02 | 深圳市裕富照明有限公司 | LED net lamp relay reinforcing control system |
| CN105044434A (en) * | 2015-07-09 | 2015-11-11 | 深圳市明微电子股份有限公司 | Current detection circuit, power switch chip and switching power source |
| CN105282896A (en) * | 2014-05-27 | 2016-01-27 | 宁波高新区赛尔富电子有限公司 | Power supply control circuit of LED lamp |
| CN105898926A (en) * | 2016-05-30 | 2016-08-24 | 广东工业大学 | LED (Light Emitting Diode) power system and LED driving device thereof |
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2010
- 2010-06-02 CN CN2010202119421U patent/CN201813591U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917793A (en) * | 2010-06-02 | 2010-12-15 | 杭州奥能照明电器有限公司 | Wireless driving system of light-emitting diode |
| CN101917793B (en) * | 2010-06-02 | 2013-11-06 | 杭州奥能照明电器有限公司 | Wireless driving system of light-emitting diode |
| CN102291901A (en) * | 2011-09-23 | 2011-12-21 | 青岛海信电器股份有限公司 | Driving circuit and driving device for light emitting diode (LED) array |
| CN102695334A (en) * | 2012-05-11 | 2012-09-26 | 华南理工大学 | Intelligent light modulation apparatus for LED concentrated direct current power supply system |
| CN103906322A (en) * | 2014-03-26 | 2014-07-02 | 深圳市裕富照明有限公司 | LED net lamp relay reinforcing control system |
| CN103874300A (en) * | 2014-03-31 | 2014-06-18 | 太仓电威光电有限公司 | Method and system for adjusting parameters of output end of LED drive |
| CN105282896A (en) * | 2014-05-27 | 2016-01-27 | 宁波高新区赛尔富电子有限公司 | Power supply control circuit of LED lamp |
| CN105044434A (en) * | 2015-07-09 | 2015-11-11 | 深圳市明微电子股份有限公司 | Current detection circuit, power switch chip and switching power source |
| CN105044434B (en) * | 2015-07-09 | 2018-01-26 | 深圳市明微电子股份有限公司 | A kind of current detection circuit, power switch chip and Switching Power Supply |
| CN105898926A (en) * | 2016-05-30 | 2016-08-24 | 广东工业大学 | LED (Light Emitting Diode) power system and LED driving device thereof |
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