CN107222952A - LED lamp universaling coder circuit for visible light communication - Google Patents
LED lamp universaling coder circuit for visible light communication Download PDFInfo
- Publication number
- CN107222952A CN107222952A CN201710609319.8A CN201710609319A CN107222952A CN 107222952 A CN107222952 A CN 107222952A CN 201710609319 A CN201710609319 A CN 201710609319A CN 107222952 A CN107222952 A CN 107222952A
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- led
- drive power
- mcu
- mos1
- mos2
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The invention discloses a kind of LED lamp universaling coder circuit for visible light communication, the encoder circuit include being used for sending the MCU of control signal, the driving chip of the voltage for amplifying the control signal that MCU is sent and driving force, two be used to control the auxiliary energy-dissipating device of the metal-oxide-semiconductor of LED light on and off, the output voltage for maintaining LED drive power and electric current, for illuminating and circulating send the LED of its identity identification information and for the LED drive power to LED stable power-supplying.The present invention is a kind of accurate control LED fast-lighting, the LED lamp universaling coder circuit for visible light communication gone out, the circuit is used to modulate and drives LED to send the visible ray for carrying the light fixture identity information, LED is accurately sent identification signals.The present invention makes full use of original LED and driving power supply, and the optical signal for have the advantages that cost is low, stability is high, sending is accurate.
Description
Technical field
The invention belongs to optic communication and indoor positioning technologies field, particularly relate to a kind of for visible light communication
LED lamp universaling coder circuit.
Background technology
In recent years, as LED is in the need widely used with modern society and industrial production to indoor positioning of lighting field
Ask aggravation, it is seen that optic communication（Visible Light Communication）It is of increased attention.Visible light communication
Take into account illumination and communicate, with great potential market value.Visible light communication uses LED lamp as identification signals
Emission source, terminal device obtains the identity information of light fixture using first-class photosensitive part is imaged, then obtains identity letter from database
Corresponding positional information is ceased, positioning function is completed then in conjunction with the relative position of light fixture.Visible light communication has not by electromagnetism
Disturb, do not produce the advantages such as radiation and positioning precision height.
At present, it is mostly to use constant-current source as driving power supply to make to illuminate the LED lamp used on the market in the prior art.This
Plant LED lamp and send continuous light, the identity information not comprising light fixture.Main solution is the driving electricity using customization at present
Existing driving power supply is transformed in source, accurate control LED it is bright, go out, light fixture circulation is sent its identity information.So exist
In practical engineering application, such as using customization power supply, the type selecting scope of LED lamp can be greatly limited；For having chosen not
Common driving power supply with output light coded modulation function, then need to be subject to internal circuit transformation, so can cause power supply reliability
And the problems such as compatibility, not only easily break down and also result in after-sale service responsibility dispute.Therefore, LED illumination lamp is being used
Tool realizes the application scenario of visible light communication, is badly in need of a kind of commercial LED illumination lamp commonly that is directed to and simply connect
Increase the general LED visible light communication encoder of output light coded modulation function in conventional illumination basis.
The content of the invention
It is fast that the present invention provides a kind of accurate control LED in order to overcome the shortcomings of that prior art is present, for LED light communication
The LED lamp universaling coder circuit for visible light communication of fast light on and off, the circuit is used to modulate and drive LED to send to take
Visible ray with the light fixture identity information, makes LED accurately send identification signals.
The present invention is achieved by the following technical solutions：A kind of LED lamp universaling coder for visible light communication
Circuit, the encoder circuit includes being used to periodically send out the MCU of control signal, for amplifying the control signal that MCU is sent
Voltage and driving force driving chip, two be used for control the metal-oxide-semiconductor of LED light on and off, for maintaining LED drive power
The auxiliary energy-dissipating device of output voltage and electric current, for illuminate and circulate send its identity identification information LED and for
The LED drive power of LED stable power-supplying；
Two metal-oxide-semiconductors are respectively MOS1 and MOS2, and metal-oxide-semiconductor can control the loop of LED drive power, and MOS1 grid connection is driven
The output end C_HO, MOS1 of dynamic chip source electrode and drain electrode are connected with LED drive power and LED respectively, LED drive power,
MOS1 and LED constitute a loop；The output end C_LO, MOS2 of MOS2 grid connection driving chip source electrode and drain electrode point
It is not connected with LED drive power and auxiliary energy-dissipating device, LED drive power, MOS2 and auxiliary energy-dissipating device constitute a loop；
MCU power supply meets VCC1 and GND, and the power supply of driving chip meets VCC2 and GND, it should be pointed out that MCU and driving chip
Power supply it is not always necessary that two power supplys, when voltage needed for both is equal, a power supply can be shared；The signal of driving chip
Input connection MCU signal output part C0, MCU output signal pin connect the input pin of driving chip, driving chip
Output signal is C_HO and C_LO, the low and high level states of the two output signals of C_HO and C_LO at any time all on the contrary,
C_HO and C_LO are coupled with MOS1 and MOS2 grid.
When it is low level that C_HO, which is high level C_LO, MOS1 conductings, MOS2 shut-offs, the loop of LED drive power is LED
Driving power supply-MOS1-LED lamps, LED lights；When it is high level that C_HO, which is low level C_LO, MOS1 shut-offs, MOS2 conductings,
The loop of LED drive power is LED drive power-MOS2- auxiliary energy-dissipating devices, and LED is extinguished.
Auxiliary energy-dissipating device be with LED parameter identical another LED, or equivalent resistance and LED etc.
The close resistance device of resistance is imitated, auxiliary energy-dissipating device is matched to ensure electricity when LED is gone out with original driving power supply
The steady operation on road.Auxiliary energy-dissipating device makes the output voltage and output current of LED drive power not undergo mutation, and drives LED
Dynamic power supply is constantly in normal operating conditions.Energy can be reduced by making auxiliary energy-dissipating device using the LED of another same size
Source is wasted, but when making auxiliary energy-dissipating device using the LED of another same size, former LED consumes energy LED not with auxiliary
Same equal light shield, LED drive power selection constant-current source can be used.
The beneficial effects of the invention are as follows：The present invention provides a kind of accurate control LED fast-lighting for LED light communication, gone out
The LED lamp universaling coder circuit for visible light communication, the circuit be used for modulate and drive LED send carrying the lamp
Have the visible ray of identity information, LED is accurately sent identification signals.Universaling coder circuit in the present invention includes
Microprocessor for sending control signal（MCU）, for amplifying control signal that MCU sends and driving the driving core of metal-oxide-semiconductor
Piece, for controlling the loop of LED drive power with control the bright of LED, the metal-oxide-semiconductor that goes out, can be resistance or LED auxiliary
Energy-dissipating device and for the input power for power supplies such as MCU, driving chip and LEDs.Universaling coder electricity in the present invention
Road makes full use of original LED and driving power supply, and the optical signal for have the advantages that with low cost, stability is high, sending is accurate.
Brief description of the drawings
Fig. 1 is the LED lamp universaling coder circuit block diagram in the present invention；
Fig. 2 is the LED lamp universaling coder circuit block diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in figure 1, a kind of LED lamp universaling coder circuit for visible light communication, the encoder circuit includes
Driving for periodically sending out the MCU of control signal, the voltage for amplifying the control signal that MCU is sent and driving force
Chip, two be used for control the auxiliary of the metal-oxide-semiconductor of LED light on and off, the output voltage for maintaining LED drive power and electric current to consume
Can device, for illuminate and circulate send its identity identification information LED and for LED stable power-supplying LED driving
Power supply；Two metal-oxide-semiconductors are respectively MOS1 and MOS2, and metal-oxide-semiconductor can control the loop of LED drive power, MOS1 grid connection
The output end C_HO, MOS1 of driving chip source electrode and drain electrode are connected with LED drive power and LED respectively, LED driving electricity
Source, MOS1 and LED constitute a loop；The output end C_LO, MOS2 of MOS2 grid connection driving chip source electrode and leakage
Pole is connected with LED drive power and auxiliary energy-dissipating device respectively, and LED drive power, MOS2 and auxiliary energy-dissipating device constitute one
Loop.
MCU power supply meets VCC1 and GND, and the power supply of driving chip meets VCC2 and GND, it should be pointed out that MCU and driving
The power supply of chip is it is not always necessary that two power supplys, when voltage needed for both is equal, can share a power supply；Driving chip
Signal input part connection MCU signal output part C0, MCU output signal pin connect the input pin of driving chip, drive core
The output signal of piece is C_HO and C_LO, the low and high level states of the two output signals of C_HO and C_LO all phase at any time
Instead, C_HO and C_LO are coupled with MOS1 and MOS2 grid.
When it is low level that C_HO, which is high level C_LO, MOS1 conductings, MOS2 shut-offs, the loop of LED drive power is LED
Driving power supply-MOS1-LED lamps, LED lights；When it is high level that C_HO, which is low level C_LO, MOS1 shut-offs, MOS2 conductings,
The loop of LED drive power is LED drive power-MOS2- auxiliary energy-dissipating devices, and LED is extinguished.
Auxiliary energy-dissipating device be with LED parameter identical another LED, or equivalent resistance and LED etc.
The close resistance device of resistance is imitated, auxiliary energy-dissipating device is matched to ensure electricity when LED is gone out with original driving power supply
The steady operation on road, LED drive power selection constant-current source.
In order that the present invention mesh, technical scheme and advantage it is clearer, clear and definite, now illustrate and the present invention done further
Illustrate, specific embodiment described herein does not limit the present invention only to explain the present invention.
Embodiment：The circuit block diagram of the present embodiment is as shown in Fig. 2 specifically include：
(1) Atmega48 single-chip minimum systems, for periodically sending out control signal；
(2) driving chip IR2104, voltage and driving force for amplifying the control signal that MCU is sent；
(3) N-channel MOS pipe, for controlling the loop of LED drive power with control LED it is bright, go out；
(4) 200 ohm of heat sink resistance makees auxiliary energy-dissipating device, the output for maintaining LED drive power when LED is extinguished
Voltage and current, ensures the steady operation of circuit；
(5) LED, for illuminating and circulation sends its identity identification information, equivalent resistance during its normal work is about 200 Europe
Nurse；
(6) 280mA LED constant current driving power supply, for giving LED stable power-supplying.
Wherein Atmega48 single-chip minimum systems power supply connects 5V power supplys, and its output signal pin connects the input of driving chip
The program that circulation sends control signal is prefixed in pin, Atmega48 single-chip microcomputers.Auxiliary energy-dissipating device in the present embodiment is
One 200 ohm of heat sink resistance.
Driving chip IR2104 power supplys connect 12V power supplys, and its output signal is C_HO, C_LO low and high level state on the contrary, dividing
Not being connected to MOS1 and MOS2 grid, then be equipped with the necessary peripheral circuit such as electric capacity, diode makes driving chip normal work.Work as C_
HO is high level and when C_LO is low level, MOS1 conductings and MOS2 is turned off, the loop of LED drive power be LED drive power-
MOS1-LED lamps, LED lights；When C_HO is low level and C_LO is high level, MOS1 shut-offs and MOS2 conductings, LED drive
The loop of dynamic power supply is LED drive power-MOS2- heat sink resistances, and LED is extinguished.
Finally it should be noted that above content is merely illustrative of the technical solution of the present invention, rather than to present invention protection
The limitation of scope, simple modification or equivalent substitution that one of ordinary skill in the art is carried out to technical scheme,
All without departing from the spirit and scope of technical solution of the present invention.
Claims (4)
1. a kind of LED lamp universaling coder circuit for visible light communication, it is characterised in that：The encoder circuit includes
Driving for periodically sending out the MCU of control signal, the voltage for amplifying the control signal that MCU is sent and driving force
Chip, two be used for control the auxiliary of the metal-oxide-semiconductor of LED light on and off, the output voltage for maintaining LED drive power and electric current to consume
Can device, for illuminate and circulate send its identity identification information LED and for LED stable power-supplying LED driving
Power supply；
Described two metal-oxide-semiconductors are respectively MOS1 and MOS2, and the grid of the MOS1 connects the output end C_HO, MOS1 of driving chip
Source electrode and drain electrode be connected respectively with LED drive power and LED, the LED drive power, MOS1 and LED composition one
Loop；The MOS2 grid connection driving chip output end C_LO, MOS2 source electrode and drain electrode respectively with LED drive power
With auxiliary energy-dissipating device connection, the LED drive power, MOS2 and auxiliary energy-dissipating device constitute a loop；
The power supply of the MCU meets VCC1 and GND, and the power supply of driving chip meets VCC2 and GND, electric needed for MCU and driving chip
When pressing equal, MCU and driving chip share a power supply, and the signal input part of driving chip connects MCU signal output part C0,
MCU output signal pin connects the input pin of driving chip, and the output signal of driving chip is C_HO and C_LO, C_HO and C_
The low and high level state of the two output signals of LO is at any time all on the contrary, C_HO and C_LO are coupled with MOS1's and MOS2
Grid.
2. the LED lamp universaling coder circuit according to claim 1 for visible light communication, it is characterised in that：When
C_HO is high level C_LO when being low level, MOS1 conductings, MOS2 shut-offs, the loop of LED drive power be LED drive power-
MOS1-LED lamps, LED lights；When it is high level that C_HO, which is low level C_LO, MOS1 shut-offs, MOS2 conductings, LED driving electricity
The loop in source is LED drive power-MOS2- auxiliary energy-dissipating devices, and LED is extinguished.
3. the LED lamp universaling coder circuit according to claim 1 for visible light communication, it is characterised in that：Institute
Stating auxiliary energy-dissipating device is and described another LED of LED parameter identical, or equivalent resistance and the LED
The close resistance device of equivalent resistance, auxiliary energy-dissipating device is matched to ensure when LED is gone out with original driving power supply
The steady operation of circuit.
4. the LED lamp universaling coder circuit according to claim 1 for visible light communication, it is characterised in that：Institute
State LED drive power selection constant-current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609319.8A CN107222952A (en) | 2017-07-25 | 2017-07-25 | LED lamp universaling coder circuit for visible light communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609319.8A CN107222952A (en) | 2017-07-25 | 2017-07-25 | LED lamp universaling coder circuit for visible light communication |
Publications (1)
| Publication Number | Publication Date |
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| CN107222952A true CN107222952A (en) | 2017-09-29 |
Family
ID=59954747
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710609319.8A Pending CN107222952A (en) | 2017-07-25 | 2017-07-25 | LED lamp universaling coder circuit for visible light communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966424A (en) * | 2018-08-14 | 2018-12-07 | 湖南品胜生物技术有限公司 | A kind of control method of microscope light source |
| CN114126139A (en) * | 2021-11-30 | 2022-03-01 | 华南理工大学 | LED drive module with visible light communication function |
| CN114554650A (en) * | 2022-02-22 | 2022-05-27 | 北京奕斯伟计算技术有限公司 | LED drive circuit, bias voltage generator thereof and LED lighting device |
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| JPS60178735A (en) * | 1984-02-24 | 1985-09-12 | Sumitomo Electric Ind Ltd | Drive circuit of light emitting element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108966424A (en) * | 2018-08-14 | 2018-12-07 | 湖南品胜生物技术有限公司 | A kind of control method of microscope light source |
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| CN114554650A (en) * | 2022-02-22 | 2022-05-27 | 北京奕斯伟计算技术有限公司 | LED drive circuit, bias voltage generator thereof and LED lighting device |
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Application publication date: 20170929 |