CN103561525B - Optical communication device based on white light LED illumination - Google Patents
Optical communication device based on white light LED illumination Download PDFInfo
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- CN103561525B CN103561525B CN201310573918.0A CN201310573918A CN103561525B CN 103561525 B CN103561525 B CN 103561525B CN 201310573918 A CN201310573918 A CN 201310573918A CN 103561525 B CN103561525 B CN 103561525B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides an optical communication device based on white light LED illumination. A communication function is achieved through an LED illuminating lamp array, cost is low, energy is saved, and the environment is protected. The optical communication device based on the white light LED illumination comprises a transmitting end and a receiving end, wherein the transmitting end comprises an LED modulation driving circuit connected with the LED illuminating lamp array, and the receiving end comprises an LED optical communication receiving circuit. The LED modulation driving circuit comprises a full-wave rectification bridge composed of four diodes capable of being connected into an alternating current power supply, the direct current voltage output end of the full-wave rectification bridge is connected with an energy-storage capacitor in parallel, the two ends of the energy-storage capacitor are connected with a filter circuit, the output end of the filter circuit is connected with a light modulation driving chip, a switch control pin of the chip is connected with the negative electrode of the LED illuminating lamp array, a switch pin of the chip is connected with the negative electrode of a voltage stabilizing diode and one end of an inductor, and the other end of the inductor is connected with the negative electrode of the LED illuminating lamp array and one end of a protective capacitor. The LED optical communication receiving circuit comprises a PIN photoelectric detector, an amplifying circuit and a signal processing unit.
Description
Technical field
The present invention relates to optical communication field, particularly relate to a kind of optical communication apparatus based on White-light LED illumination.
Background technology
In recent years, LED as the lighting apparatus of a kind of low-carbon (LC), energy-saving and environmental protection, gradually understand by people, be also as country and local government's emerging strategic industries of fostering energetically in intelligent lighting field.LED with its bright-coloured abundant color, extra long life and extremely strong security performance have an optimistic view of by industry, gradually common illuminating lamp (as incandescent lamp) has been eliminated out illumination market.Expert expects was at about 2015, and LED illumination will realize universalness.There is research report to show: LED illumination research has again new technology to break through a few days ago, directly can be carried out the connection of broadband network by LED lamplight.
LED is different from conventional illumination device, and it is energy saving not only, also by switch motion at a high speed, can send modulation signal, complete the transmission of information and instruction.LED luminescence is flickering, flash rate is high, and the speed of switch per second reaches as high as 2,000,000 times, and ceaselessly switch motion can not affect use of throwing light on normally, more can not have an impact to human body, because the naked eyes of people can't see so fast frequency change at all.This flashing is exactly a kind of open and close process in fact, this one open-one close of LED just can bear the task of transmission information, such as, open just representative " 1 ", close just representative " 0 ", by information coding namely 0 and 1 various combinations, just can be delivered by light, light transmits in atmosphere and is just similar to information in optical fiber communication and transmits the same in a fiber, the general principle of LED visible light communication that Here it is.LED is as semiconductor device, and the light on and off of this high speed i.e. the make-break capacity of switch are its characteristics, and incandescent lamp because be very easy to damaged in the change procedure of light on and off, and light on and off transition activities is too slow, does not thus possess this communication function.The receiving equipment settled in LED lamplight range of exposures just can receiving optical signals, and light signal can be converted to the signal of telecommunication, realizes the reception of information, instruction.
Summary of the invention
The invention provides a kind of optical communication apparatus based on White-light LED illumination, make LED illumination lamp array realize communication function, stable signal transmission, bandwidth is high, fast response time; And cost is low, energy-conserving and environment-protective.
Technical scheme of the present invention is:
Based on an optical communication apparatus for White-light LED illumination, it is characterized in that, comprise transmitting terminal and receiving terminal, described transmitting terminal comprises the LED modulation drive circuit be connected with LED array, and described receiving terminal comprises LED light communications reception circuit;
Described LED modulation drive circuit comprises can the full-wave rectification bridge be made up of four diodes of incoming transport power supply, the DC voltage output end of described full-wave rectification bridge is connected in parallel storage capacitor C1, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R1 of RC filter circuit connects the positive output end of storage capacitor C1, and filter capacitor C2 is connected in parallel between the other end of resistance R1 and the negative output terminal of storage capacitor C1; The output of RC filter circuit connects power supply pin VBAT and the ground pin GND of light modulation driving chip IC, the switch control rule pin CTRL of light modulation driving chip IC connects the negative pole of LED array, the switch pin SW of light modulation driving chip IC connects the negative pole of a voltage stabilizing didoe D1 and one end of inductance L 1, the other end of inductance L 1 connects the negative pole of LED array and one end of protection electric capacity C4, and the positive pole of LED array, the positive pole of voltage stabilizing didoe are all connected the VBAT pin of light modulation driving chip IC with the other end of protection electric capacity C4; The reseting pin RSET of light modulation driving chip IC connects the negative output terminal of RC filter circuit by resistance R2;
Described receiving circuit comprises PIN photoelectric detector, amplifying circuit and signal processing unit, described PIN photoelectric detector is PIN photodiode D1, described amplifying circuit comprises first crystal triode Q3 and the second transistor Q4, the collector electrode of first crystal triode Q3 connects the base stage of the second transistor Q4 by electric capacity C6, the collector electrode of first crystal triode Q3 also connects 5V power supply by protective resistance R9, the collector electrode of the second transistor Q4 connects 5V power supply by protective resistance R11, between the collector electrode of first crystal triode Q3 and base stage, there is biasing resistor R8, between the collector electrode of the second transistor Q4 and base stage, there is biasing resistor R10, the base stage of first crystal triode Q3 connects the negative pole of PIN photodiode D1 and one end of regulating resistance R7 by electric capacity C5, and the emitter of the other end of regulating resistance R7 and the emitter of first crystal triode Q3 and the second transistor Q4 altogether, the positive pole of PIN photodiode D1 connects 5V power supply, described signal processing unit comprises DSP decoder module, FPGA system control module, MAC protocol processing module and Network Interface Module, the input of described DSP decoder module connects the collector electrode of the second transistor Q4, the output of DSP decoder module connects FPGA system control module and MAC protocol processing module respectively, MAC protocol processing module interconnection network interface module.
Described LED array is RGB-LED lamp array, and by red, green, blue three-color LED chip package together, the light that they send mixes and obtains white light described RGB-LED lamp array.
Technique effect of the present invention: the invention provides a kind of optical communication apparatus based on White-light LED illumination, make LED illumination lamp array realize communication function, have stable signal transmission, bandwidth is high, the feature of fast response time, and cost is low, energy-conserving and environment-protective.
The transmitting terminal of apparatus of the present invention comprises the LED modulation drive circuit be connected with LED array, can incoming transport power supply, strong adaptability, can keep efficient in wider voltage range, provide stable operating voltage to LED, enable LED steady operation, meet lighting requirement, and very high switching rate must be had just to take into account communication, therefore employing light modulation driving chip IC, has higher switching rate and power consumption is lower; Original binary bits by LED modulation drive circuit driving LED, is carried out intensity modulated to LED, is converted electrical signals to light signal after flowing through preliminary treatment and coding; The LED array be connected with LED modulation drive circuit is RGB-LED lamp array, RGB-LED lamp array adopts red, green, blue three-color LED chip package together, the light that they send mixes and obtains white light, and RGB-LED has very high modulation bandwidth, very high transmission rate can be realized.
The receiving circuit of apparatus of the present invention receiving terminal comprises PIN photoelectric detector, amplifying circuit and signal processing unit, LED light signal is converted to the signal of telecommunication through photoelectric detector, then the signal of telecommunication amplified and process, Digital Signal Processing is carried out again by signal processing unit, under the control of FPGA system control module, carry out DSP decoding demodulation by DSP decoder module, transfer out output signal by MAC protocol processing module and Network Interface Module.DSP decoder module adopts general or special purpose digital signal processing chip, DSP is had flexible, accurate, good reliability, volume are little, cost is low, high arithmetic speed these be applied in optical communication in the advantage of the communications field, substantially increase arithmetic speed and the reliability of optical communication, reduce circuit volume, reduce manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the LED modulation drive circuit structure chart of apparatus of the present invention.
Fig. 2 is the LED light communications reception circuit structure diagram of apparatus of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Based on an optical communication apparatus for White-light LED illumination, comprise transmitting terminal and receiving terminal, transmitting terminal comprises the LED modulation drive circuit be connected with LED array, and receiving terminal comprises LED light communications reception circuit.
As shown in Figure 1, be the LED modulation drive circuit structure chart of apparatus of the present invention.LED modulation drive circuit comprises can the full-wave rectification bridge be made up of four diodes of incoming transport power supply, the DC voltage output end of full-wave rectification bridge is connected in parallel storage capacitor C1, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R1 of RC filter circuit connects the positive output end of storage capacitor C1, and filter capacitor C2 is connected in parallel between the other end of resistance R1 and the negative output terminal of storage capacitor C1; The output of RC filter circuit connects power supply pin VBAT and the ground pin GND of light modulation driving chip IC, the switch control rule pin CTRL of light modulation driving chip IC connects the negative pole of LED array, the switch pin SW of light modulation driving chip IC connects the negative pole of a voltage stabilizing didoe D1 and one end of inductance L 1, the other end of inductance L 1 connects the negative pole of LED array and one end of protection electric capacity C4, and the positive pole of LED array, the other end and the positive pole of voltage stabilizing didoe of protection electric capacity C4 are all connected the VBAT pin of light modulation driving chip IC; The reseting pin RSET of light modulation driving chip IC connects the negative output terminal of RC filter circuit by resistance R2.The LED array be connected with LED modulation drive circuit is RGB-LED lamp array, and RGB-LED lamp array is that the light that they send mixes and obtains white light by red, green, blue three-color LED chip package together.
As shown in Figure 2, be the LED light communications reception circuit structure diagram of apparatus of the present invention.A kind of LED light communications reception circuit, comprises PIN photoelectric detector, amplifying circuit and signal processing unit, PIN photoelectric detector is PIN photodiode D1, amplifying circuit comprises first crystal triode Q3 and the second transistor Q4, the collector electrode of first crystal triode Q3 connects the base stage of the second transistor Q4 by electric capacity C6, the collector electrode of first crystal triode Q3 also connects 5V power supply by protective resistance R9, the collector electrode of the second transistor Q4 connects 5V power supply by protective resistance R11, between the collector electrode of first crystal triode Q3 and base stage, there is biasing resistor R8, between the collector electrode of the second transistor Q4 and base stage, there is biasing resistor R10, the base stage of first crystal triode Q3 connects the negative pole of PIN photodiode D1 and one end of regulating resistance R7 by electric capacity C5, and the emitter of the other end of regulating resistance R7 and the emitter of first crystal triode Q3 and the second transistor Q4 altogether, the positive pole of PIN photodiode D1 connects 5V power supply, signal processing unit comprises DSP decoder module, FPGA system control module, MAC protocol processing module and Network Interface Module, the input of described DSP decoder module connects the collector electrode of the second transistor Q4, the output of DSP decoder module connects FPGA system control module and MAC protocol processing module respectively, MAC protocol processing module interconnection network interface module.
In LED light communication, transmitting terminal drives the main task of modulation circuit to be make LED namely meet illumination needs, has very high switching rate again with the needs of satisfied transmission data.LED modulation drive circuit of the present invention comprises can the full-wave rectification bridge be made up of four diodes of incoming transport power supply and RC filter circuit, strong adaptability, can keep efficient in wider voltage range, stable operating voltage is provided to LED, enable LED steady operation, meet lighting requirement; Adopt light modulation driving chip IC simultaneously, there is the feature of higher switching rate and lower power consumption, meet the needs of transmission data; Original binary bits by LED modulation drive circuit driving LED, carries out intensity modulated to LED after flowing through preliminary treatment and coding, is modulated to by the signal of telecommunication and LED light source is converted to optical signal transmission goes out.
In LED light communication, the main task of receiving terminal receiving circuit is with minimum additional noise and distortion, recovers via the information after wireless optical channel transmission entrained by light carrier.Receiving circuit of the present invention comprises PIN photoelectric detector, amplifying circuit and signal processing unit, the LED light signal that carry transmission data focuses on photoelectric detector, first the signal of telecommunication is converted to through photoelectric detector, wherein PIN photoelectric detector selected by photoelectric detector, and PIN photoelectric detector has the advantages that quantum efficiency is high, highly sensitive, fast response time, noise are little; Then carry out amplification process to the signal of telecommunication, amplifying circuit adopts two-stage triode direct coupling type amplifying circuit, reduces distortion to greatest extent; By signal processing unit, Digital Signal Processing is carried out to amplifying signal again, under the control of FPGA system control module, DSP decoding demodulation is carried out by DSP decoder module, decoder module adopts general or special purpose digital signal processing chip, have flexibly, accurately, good reliability, volume are little, cost is low, the feature of high arithmetic speed, the signal that the transmitting terminal recovered by the demodulation of DSP decoding module decodes is sent, then transmit out by MAC protocol processing module and Network Interface Module.
It should be pointed out that the above embodiment can make the invention of those skilled in the art's comprehend, but do not limit the present invention in any way creation.Therefore, although this specification and embodiment have been described in detail to the invention, it will be appreciated by those skilled in the art that and still can modify to the invention or equivalent replacement; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it is all encompassed in the middle of the protection range of the invention patent.
Claims (2)
1. based on an optical communication apparatus for White-light LED illumination, it is characterized in that, comprise transmitting terminal and receiving terminal, described transmitting terminal comprises the LED modulation drive circuit be connected with LED array, and described receiving terminal comprises LED light communications reception circuit;
Described LED modulation drive circuit comprises can the full-wave rectification bridge be made up of four diodes of incoming transport power supply, the DC voltage output end of described full-wave rectification bridge is connected in parallel storage capacitor C1, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R1 of RC filter circuit connects the positive output end of storage capacitor C1, and filter capacitor C2 is connected in parallel between the other end of resistance R1 and the negative output terminal of storage capacitor C1; The output of RC filter circuit connects power supply pin VBAT and the ground pin GND of light modulation driving chip IC, the switch control rule pin CTRL of light modulation driving chip IC connects the negative pole of LED array, the switch pin SW of light modulation driving chip IC connects the negative pole of a voltage stabilizing didoe D1 and one end of inductance L 1, the other end of inductance L 1 connects the negative pole of LED array and one end of protection electric capacity C4, and the positive pole of LED array, the positive pole of voltage stabilizing didoe are all connected the VBAT pin of light modulation driving chip IC with the other end of protection electric capacity C4; The reseting pin RSET of light modulation driving chip IC connects the negative output terminal of RC filter circuit by resistance R2;
Described receiving circuit comprises PIN photoelectric detector, amplifying circuit and signal processing unit, described PIN photoelectric detector is PIN photodiode D1, described amplifying circuit comprises first crystal triode Q3 and the second transistor Q4, the collector electrode of first crystal triode Q3 connects the base stage of the second transistor Q4 by electric capacity C6, the collector electrode of first crystal triode Q3 also connects 5V power supply by protective resistance R9, the collector electrode of the second transistor Q4 connects 5V power supply by protective resistance R11, between the collector electrode of first crystal triode Q3 and base stage, there is biasing resistor R8, between the collector electrode of the second transistor Q4 and base stage, there is biasing resistor R10, the base stage of first crystal triode Q3 connects the negative pole of PIN photodiode D1 and a stiff end of regulating resistance R7 by electric capacity C5, and the emitter of another stiff end of regulating resistance R7 and movable end and first crystal triode Q3 and the emitter of the second transistor Q4 are altogether, the positive pole of PIN photodiode D1 connects 5V power supply, described signal processing unit comprises DSP decoder module, FPGA system control module, MAC protocol processing module and Network Interface Module, the input of described DSP decoder module connects the collector electrode of the second transistor Q4, the output of DSP decoder module connects FPGA system control module and MAC protocol processing module respectively, MAC protocol processing module interconnection network interface module.
2. the optical communication apparatus based on White-light LED illumination according to claim 1, it is characterized in that, described LED array is RGB-LED lamp array, and by red, green, blue three-color LED chip package together, the light that they send mixes and obtains white light described RGB-LED lamp array.
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| CN103561525B true CN103561525B (en) | 2015-05-27 |
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| RU2695817C2 (en) * | 2014-08-01 | 2019-07-29 | Филипс Лайтинг Холдинг Б.В. | Circuit for driving load |
| CN111256051A (en) * | 2020-01-21 | 2020-06-09 | 厦门普为光电科技有限公司 | Optical communication lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4677859B2 (en) * | 2005-08-25 | 2011-04-27 | 東芝ライテック株式会社 | LED lighting device |
| CN202334980U (en) * | 2011-07-07 | 2012-07-11 | 周坚 | Maintenance-free domestic emergency illumination indicating lamp |
| CN202696962U (en) * | 2012-06-12 | 2013-01-23 | 中山市山沃照明有限公司 | Light emitting diode (LED) driving power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE60316178T2 (en) * | 2002-10-24 | 2008-06-05 | Nakagawa Laboratories, Inc. | COMMUNICATION DEVICE WITH ILLUMINATING LIGHT |
| JP4652211B2 (en) * | 2005-10-28 | 2011-03-16 | 京セラ株式会社 | Optical communication apparatus, optical communication system, and optical communication method |
| CN101977473A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Indoor light-emitting diode (LED) constant current illuminating lamp |
| CN203708541U (en) * | 2013-11-18 | 2014-07-09 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED lighting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4677859B2 (en) * | 2005-08-25 | 2011-04-27 | 東芝ライテック株式会社 | LED lighting device |
| CN202334980U (en) * | 2011-07-07 | 2012-07-11 | 周坚 | Maintenance-free domestic emergency illumination indicating lamp |
| CN202696962U (en) * | 2012-06-12 | 2013-01-23 | 中山市山沃照明有限公司 | Light emitting diode (LED) driving power supply |
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