CN203327342U - White-light LED communication drive circuit - Google Patents
White-light LED communication drive circuit Download PDFInfo
- Publication number
- CN203327342U CN203327342U CN2013204413305U CN201320441330U CN203327342U CN 203327342 U CN203327342 U CN 203327342U CN 2013204413305 U CN2013204413305 U CN 2013204413305U CN 201320441330 U CN201320441330 U CN 201320441330U CN 203327342 U CN203327342 U CN 203327342U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- input
- current
- semiconductor
- 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.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model provides a white-light LED communication drive circuit which comprises: a self-adaptive DC/DC conversion circuit, a clamp pressure circuit and a current control circuit. The input end of the self-adaptive DC/DC conversion circuit is used for connecting with a power supply. The output end of the self-adaptive DC/DC conversion circuit is connected with a first input end of the clamp pressure circuit. A first output end of the clamp pressure circuit is used for connecting with the input end of an LED lamp group. A second output end of the clamp pressure circuit is connected with the self-adaptive DC/DC conversion circuit in a feedback way. The current control circuit is connected in series in the power supply line between the first output end of the clamp pressure circuit and the LED lamp group. The white-light LED communication drive circuit has advantages of being high in efficiency, low in energy consumption and wide in output voltage, and indefinite number of LED can be hung and connected.
Description
Technical field
The utility model belongs to the circuit design technique field, is specifically related to a kind of white light LEDs communication drive circuit.
Background technology
The white light LEDs communication technology refers to: utilize the LED device to put at a high speed the luminescence response characteristic of going out, at transmitting terminal, the with the naked eye optical carrier of imperceptible high speed modulation that LED is sent is modulated transmission information and is transmitted; At receiving terminal, utilize the electrooptical device reception optical carriers such as photodiode, and obtain transmission information.
As can be seen here, in the white light communications field, the transmission of its signal relies on white light directly to propagate in air, there is no other medium, therefore, luminous power be there are certain requirements, and especially, when the telecommunication of field, to luminous power, requires higher.Because the luminescent core parts of white light communication system are LED, LED drives by LED drive circuit, in prior art, LED drive circuit has the less and large problem of power consumption of operating current, causes single led luminosity to be difficult to meet the requirement of light source in the white light communication system; Further, for meeting light source requirements, need to use a plurality of LED, corresponding, need a plurality of LED drive circuits of configuration, on the one hand, increased the optical system complexity; On the other hand, introduced the interference between each light source, thereby reduced communication quality.In addition, existing LED output current immobilizes, and has actual inconvenient problem with use.
The utility model content
The defect existed for prior art, the utility model provides a kind of white light LEDs communication drive circuit, has advantages of that high efficiency, energy consumption are low, wide output voltage, articulates not determined number LED.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of white light LEDs communication drive circuit, comprising: self adaptation DC/DC translation circuit, voltage clamping circuit and current control circuit; The input of described self adaptation DC/DC translation circuit is for being connected with power supply; The output of described self adaptation DC/DC translation circuit is connected with the first input end of described voltage clamping circuit; The first output of described voltage clamping circuit is for being connected with the input of LED lamp group; The second output feedback link of described voltage clamping circuit is to described self adaptation DC/DC translation circuit; The described current control circuit of connecting in the supply line between the first output of described voltage clamping circuit and described LED lamp group.
Preferably, described voltage clamping circuit comprises electric current adjustment metal-oxide-semiconductor, sample circuit, signal integration circuit and amplifying circuit; The source electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the output of described self adaptation DC/DC translation circuit; The drain electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the input of described LED lamp group; The input of described sample circuit is connected with the drain electrode that the source electrode of described electric current adjustment metal-oxide-semiconductor is adjusted metal-oxide-semiconductor with described electric current respectively, and the output of described sample circuit is connected with the input of described signal integration circuit; The output of described signal integration circuit is connected with the input of described amplifying circuit; The output feedback link of described amplifying circuit is to the input of described self adaptation DC/DC translation circuit.
Preferably, described current control circuit comprises: controller, D/A converter, current sampling circuit, signal amplification circuit and drive current Circuit tuning; Described current sampling circuit is arranged on described electric current and adjusts in the drain electrode and the supply line between described LED lamp group of metal-oxide-semiconductor, the output of described current sampling circuit is connected with the input of described signal amplification circuit, the output of described signal amplification circuit is connected with the first input end of described drive current Circuit tuning, the output of described controller is connected to the second input of described drive current Circuit tuning by described D/A converter, the output of described drive current Circuit tuning is connected with the grid that described electric current is adjusted metal-oxide-semiconductor.
Preferably, described controller is single-chip microcomputer.
Preferably, described power supply is Switching Power Supply.
The utility model also provides a kind of white light LEDs communication drivers method of applying above-mentioned white light LEDs communication drive circuit, comprises the following steps:
S1, be installed to described power supply to the supply line of described LED lamp group by described white light LEDs communication drive circuit;
S2a, when needs transmission data, modulate data on LED lamp group, and finally the form with light signal sends these data;
In the process sent in these data, described sample circuit gathers the current voltage value U1 that described electric current is adjusted the metal-oxide-semiconductor two ends, to described current voltage value U1 integration and after amplifying, produce pincers and press feedback voltage, then press feedback voltage to be transferred to the comparison input of described self adaptation DC/DC translation circuit on described pincers; Described self adaptation DC/DC translation circuit, by described pincers, pressing feedback voltage compare and judge, produces the instruction of pincers pressure-controlled, and described electric current is adjusted to the magnitude of voltage pincers at metal-oxide-semiconductor two ends within maximum voltage value; In addition, described self adaptation DC/DC translation circuit is pressed feedback voltage and present load state according to described pincers, automatically adjusts the output voltage U 2 of self, makes U2=U1+U3; Wherein, the terminal voltage value that U3 is present load.
Preferably, after S1, also comprise:
S2b, described current sampling circuit gathers the output current value that described electric current is adjusted the metal-oxide-semiconductor drain side, after described output current value is amplified, obtains current signal I1, then described current signal I1 is transferred to the first input end of described drive current Circuit tuning;
Described controller produces the digital quantity fiducial value, by D/A converter, described digital quantity fiducial value is converted to the analog quantity fiducial value, then described analog quantity fiducial value is transferred to the second input of described drive current Circuit tuning;
The described current signal I1 that described drive current Circuit tuning relatively receives and described analog quantity fiducial value, produce and drive instruction, adjust the grid of metal-oxide-semiconductor by the described electric current of described driving order-driven, change the constant current output current value that described electric current is adjusted the metal-oxide-semiconductor drain side.
Preferably, in S2a, the described LED of modulating data on lamp group is specially:
When single-chip microcomputer receives by serial ports the data that need to send, by the IO mouth, described data are adjusted to the break-make of metal-oxide-semiconductor grid with 0,1 form control electric current, thereby by this Data Modulation on LED lamp group.
The beneficial effects of the utility model are as follows:
The white light LEDs communication drive circuit that the utility model provides and white light LEDs communication drivers method, have the following advantages: can drive large electric current, meet the demand of LED lamp power, also have advantages of that high efficiency, energy consumption are low, wide output voltage, articulate not determined number LED; Also have advantages of that simple in structure, control facilitates and modulation rate is high, can merge with visible light communication system well.
The accompanying drawing explanation
The circuit theory diagrams of the white light LEDs communication drive circuit that Fig. 1 provides for the utility model;
The voltage clamping circuit that Fig. 2 provides for the utility model and the circuit theory diagrams of current control circuit;
The circuit diagram of the self adaptation DC/DC translation circuit that Fig. 3 provides for the utility model;
The voltage clamping circuit that Fig. 4 provides for the utility model and the circuit diagram of current control circuit;
The circuit theory diagrams of the single-chip microcomputer that Fig. 5 provides for the utility model;
The circuit diagram of the single-chip microcomputer that Fig. 6 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
As shown in Figure 1, the utility model provides a kind of white light LEDs communication drive circuit, comprising: self adaptation DC/DC translation circuit, voltage clamping circuit and current control circuit; The input of described self adaptation DC/DC translation circuit is for being connected with power supply; The output of described self adaptation DC/DC translation circuit is connected with the first input end of described voltage clamping circuit; The first output of described voltage clamping circuit is for being connected with the input of LED lamp group; The second output feedback link of described voltage clamping circuit is to described self adaptation DC/DC translation circuit; The described current control circuit of connecting in the supply line between the first output of described voltage clamping circuit and described LED lamp group.As shown in Figure 3, be the circuit diagram of self adaptation DC/DC translation circuit.
As shown in Figure 2, Figure 4 shows, voltage clamping circuit comprises electric current adjustment metal-oxide-semiconductor, sample circuit, signal integration circuit and amplifying circuit; The source electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the output of described self adaptation DC/DC translation circuit; The drain electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the input of described LED lamp group; The input of described sample circuit is connected with the drain electrode that the source electrode of described electric current adjustment metal-oxide-semiconductor is adjusted metal-oxide-semiconductor with described electric current respectively, and the output of described sample circuit is connected with the input of described signal integration circuit; The output of described signal integration circuit is connected with the input of described amplifying circuit; The output feedback link of described amplifying circuit is to the input of described self adaptation DC/DC translation circuit.
Current control circuit comprises: controller, D/A converter, current sampling circuit, signal amplification circuit and drive current Circuit tuning; Described current sampling circuit is arranged on described electric current and adjusts in the drain electrode and the supply line between described LED lamp group of metal-oxide-semiconductor, the output of described current sampling circuit is connected with the input of described signal amplification circuit, the output of described signal amplification circuit is connected with the first input end of described drive current Circuit tuning, the output of described controller is connected to the second input of described drive current Circuit tuning by described D/A converter, the output of described drive current Circuit tuning is connected with the grid that described electric current is adjusted metal-oxide-semiconductor.Wherein, controller is preferably single-chip microcomputer, as shown in Fig. 5-6, is circuit theory diagrams and the circuit diagram of single-chip microcomputer.Power supply is preferably Switching Power Supply, by using Switching Power Supply, can effectively dwindle the volume of drive circuit, and the heat radiation requirement that alleviates drive circuit, in application process, also simplified system configuration.
For above-mentioned white light LEDs communication drive circuit, the white light LEDs communication drivers method of carrying out comprises the following steps:
S1, be installed to described power supply to the supply line of described LED lamp group by described white light LEDs communication drive circuit;
S2a, when needs transmission data, modulate data on LED lamp group, and finally the form with light signal sends these data.Concrete, Data Modulation can drive or inner Micro Controller Unit (MCU) driving for external microcontroller.Concrete process is: when single-chip microcomputer receives by serial ports the data that need transmission, by the IO mouth, described data are adjusted to the break-make of metal-oxide-semiconductor grid with 0,1 form control electric current, thereby this Data Modulation, on LED lamp group, then is sent with the form of light signal; At receiving terminal, after receiving light signal, light signal is carried out to demodulation, i.e. reduction obtains this data.
In the process sent in these data, described sample circuit gathers the current voltage value U1 that described electric current is adjusted the metal-oxide-semiconductor two ends, to described current voltage value U1 integration and after amplifying, produce pincers and press feedback voltage, then press feedback voltage to be transferred to the comparison input of described self adaptation DC/DC translation circuit on described pincers; Described self adaptation DC/DC translation circuit, by described pincers, pressing feedback voltage compare and judge, produces the instruction of pincers pressure-controlled, and described electric current is adjusted to the magnitude of voltage pincers at metal-oxide-semiconductor two ends within maximum voltage value; In addition, described self adaptation DC/DC translation circuit is pressed feedback voltage and present load state according to described pincers, automatically adjusts the output voltage U 2 of self, makes U2=U1+U3; Wherein, the terminal voltage value that U3 is present load.In practical application, self adaptation DC/DC translation circuit output voltage can be adjusted in the wide region of 7～36V.
By the effect of pincers pressure, make the magnitude of voltage pincers at metal-oxide-semiconductor two ends within maximum voltage value, self adaptation DC/DC translation circuit, according to the present load state, is adjusted the output voltage of self automatically, has the following advantages:
(1) improved the operating efficiency of whole circuit;
(2) reduced the power consumption of electric current adjustment metal-oxide-semiconductor, do not needed to use extra fin, the drive circuit that works long hours is without obvious temperature rise;
(3) for a LED communication drive circuit, adjust its output voltage by self adaptation DC/DC translation circuit, can freely articulate several LED lamps, meet varying number LED light source demand, have advantages of and use flexible, visible light communication system simplicity of design; In addition, also avoid the interference between Different Light, improved the white light communication quality.
Be exemplified below: the maximum voltage value at metal-oxide-semiconductor two ends is 0.3V, when this communication drive circuit only articulates a LED lamp, the constant current value of LED lamp is 3A, now, the terminal voltage value of LED lamp is 3V,: self adaptation DC/DC translation circuit is according to the required magnitude of voltage of LED lamp articulated, self adaptation output voltage U 2=0.3V+3V=3.3V; Now, the effective power P1=3V*3A=9W of load; Gross power=the 3A*3.3V=9.9W of DC/DC output; The operating efficiency of whole circuit is: 9W/9.9W=90.9%.And, for the LED drive circuit that voltage clamping circuit of the present utility model is not installed, the electric power output voltage value is generally 30V, and be changeless: output power of power supply=30V*3A=90W; Now, the operating efficiency of whole circuit is: 9W/90W=10%.As can be seen here, white light LEDs communication drive circuit provided by the utility model, have advantages of high efficiency.
In addition, for white light LEDs communication drive circuit provided by the utility model, the power consumption of metal-oxide-semiconductor is: 0.3V*3A=0.9W; And, for the LED drive circuit that voltage clamping circuit of the present utility model is not installed, the power consumption of metal-oxide-semiconductor is: 27V*3A=81W; Visible, for the LED drive circuit that voltage clamping circuit of the present utility model is not installed, the power consumption of metal-oxide-semiconductor is very large, therefore, needs to use extra fin, reduces the temperature of metal-oxide-semiconductor.And, in the utility model, the power consumption of metal-oxide-semiconductor is very little, so, do not need to use extra fin.
In addition, after S1, also comprise:
S2b, described current sampling circuit gathers the output current value that described electric current is adjusted the metal-oxide-semiconductor drain side, after described output current value is amplified, obtains current signal I1, then described current signal I1 is transferred to the first input end of described drive current Circuit tuning;
Described controller produces the digital quantity fiducial value, by D/A converter, described digital quantity fiducial value is converted to the analog quantity fiducial value, then described analog quantity fiducial value is transferred to the second input of described drive current Circuit tuning;
The described current signal I1 that described drive current Circuit tuning relatively receives and described analog quantity fiducial value, produce and drive instruction, adjust the grid of metal-oxide-semiconductor by the described electric current of described driving order-driven, change described electric current and adjust the constant current output current value of metal-oxide-semiconductor drain side, thereby reach the purpose of adjusting LED brightness.
By this step, single-chip microcomputer adopts automatic control mode, does not need to change hardware parameter, can change the output current of white light LEDs communication drive circuit, thereby meet the demand of different LED luminosity, there is the simple advantage of debugging, greatly optimized the conceptual design of visible light communication system.
In sum, the white light LEDs communication drive circuit that the utility model provides and white light LEDs communication drivers method, have the following advantages: can drive large electric current, meet the demand of LED lamp power, also have advantages of that high efficiency, energy consumption are low, wide output voltage, articulate not determined number LED; Also have advantages of that simple in structure, control facilitates and modulation rate is high, can merge with visible light communication system well.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection range of the present utility model.
Claims (5)
1. a white light LEDs communication drive circuit, is characterized in that, comprising: self adaptation DC/DC translation circuit, voltage clamping circuit and current control circuit; The input of described self adaptation DC/DC translation circuit is for being connected with power supply; The output of described self adaptation DC/DC translation circuit is connected with the first input end of described voltage clamping circuit; The first output of described voltage clamping circuit is for being connected with the input of LED lamp group; The second output feedback link of described voltage clamping circuit is to described self adaptation DC/DC translation circuit; The described current control circuit of connecting in the supply line between the first output of described voltage clamping circuit and described LED lamp group.
2. white light LEDs communication drive circuit according to claim 1, is characterized in that, described voltage clamping circuit comprises electric current adjustment metal-oxide-semiconductor, sample circuit, signal integration circuit and amplifying circuit; The source electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the output of described self adaptation DC/DC translation circuit; The drain electrode that described electric current is adjusted metal-oxide-semiconductor is connected with the input of described LED lamp group; The input of described sample circuit is connected with the drain electrode that the source electrode of described electric current adjustment metal-oxide-semiconductor is adjusted metal-oxide-semiconductor with described electric current respectively, and the output of described sample circuit is connected with the input of described signal integration circuit; The output of described signal integration circuit is connected with the input of described amplifying circuit; The output feedback link of described amplifying circuit is to the input of described self adaptation DC/DC translation circuit.
3. white light LEDs communication drive circuit according to claim 2, is characterized in that, described current control circuit comprises: controller, D/A converter, current sampling circuit, signal amplification circuit and drive current Circuit tuning; Described current sampling circuit is arranged on described electric current and adjusts in the drain electrode and the supply line between described LED lamp group of metal-oxide-semiconductor, the output of described current sampling circuit is connected with the input of described signal amplification circuit, the output of described signal amplification circuit is connected with the first input end of described drive current Circuit tuning, the output of described controller is connected to the second input of described drive current Circuit tuning by described D/A converter, the output of described drive current Circuit tuning is connected with the grid that described electric current is adjusted metal-oxide-semiconductor.
4. white light LEDs communication drive circuit according to claim 3, is characterized in that, described controller is single-chip microcomputer.
5. white light LEDs communication drive circuit according to claim 1, is characterized in that, described power supply is Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204413305U CN203327342U (en) | 2013-07-23 | 2013-07-23 | White-light LED communication drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204413305U CN203327342U (en) | 2013-07-23 | 2013-07-23 | White-light LED communication drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203327342U true CN203327342U (en) | 2013-12-04 |
Family
ID=49666631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204413305U Withdrawn - After Issue CN203327342U (en) | 2013-07-23 | 2013-07-23 | White-light LED communication drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203327342U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104349526A (en) * | 2013-07-23 | 2015-02-11 | 北京华通时空通信技术有限公司 | White light LED communication driving circuit and white light LED communication driving method |
-
2013
- 2013-07-23 CN CN2013204413305U patent/CN203327342U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104349526A (en) * | 2013-07-23 | 2015-02-11 | 北京华通时空通信技术有限公司 | White light LED communication driving circuit and white light LED communication driving method |
| CN104349526B (en) * | 2013-07-23 | 2016-09-14 | 北京华通时空通信技术有限公司 | White light LEDs communication drive circuit and white light LEDs communication drivers method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105790554A (en) | IGBT circuit having dual-isolation characteristic and control method thereof | |
| CN202873136U (en) | LED lamp control system | |
| CN201657400U (en) | LED dimming controller | |
| CN101820711B (en) | Light-dimmer circuit of LED street lamp | |
| CN106375002B (en) | A kind of LED illumination and VLC telecommunication circuit and method of PWM/OFDM light modulation modulation | |
| CN109548224A (en) | The intelligent control system of place illumination is realized based on carrier communication | |
| CN108282930A (en) | Light adjusting circuit, lamp assembly, light adjusting system and light-dimming method | |
| CN203327342U (en) | White-light LED communication drive circuit | |
| CN203708541U (en) | Optical communication device based on white light LED lighting | |
| CN208046966U (en) | Light adjusting circuit, lamp assembly and light adjusting system | |
| CN203734893U (en) | Intelligent LED lamp controller based on Z-wave network and control system of intelligent LED lamp controller | |
| CN212936255U (en) | Dimming control module of lighting lamp | |
| CN201937901U (en) | Intelligent constant-voltage type light emitting diode (LED) dimming controller | |
| CN201651825U (en) | Photosensitive automatic dimming LED lamp | |
| CN204465952U (en) | A kind of LED energy-saving circuit based on MSP430 | |
| CN104349526A (en) | White light LED communication driving circuit and white light LED communication driving method | |
| CN203416468U (en) | ED multichannel light-adjustable power supply device of wireless measurement and control | |
| CN203340386U (en) | Drive power supply of infrared remote control stepless dimming band night lamp | |
| WO2018112953A1 (en) | Led intelligent dimming apparatus | |
| CN111683434A (en) | LED lamp remote transmission system | |
| CN206149552U (en) | A dimmer circuit for non - isolation LED drive power supply | |
| CN204730000U (en) | A kind of color-adjustable LED lamp bar system | |
| CN205029949U (en) | Switch switches formula alternating current circuit adjusts luminance system for LED power | |
| CN203368851U (en) | A driving power supply of an LED stepless light modulation which allows timing to be carried out | |
| CN205160835U (en) | Multi -functional unreal image assembled lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131204 Effective date of abandoning: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |