CN203708541U - Optical communication device based on white light LED lighting - Google Patents
Optical communication device based on white light LED lighting Download PDFInfo
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- CN203708541U CN203708541U CN201320725078.0U CN201320725078U CN203708541U CN 203708541 U CN203708541 U CN 203708541U CN 201320725078 U CN201320725078 U CN 201320725078U CN 203708541 U CN203708541 U CN 203708541U
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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 utility model provides an optical communication device based on white light LED lighting. The optical communication device which is low in cost, energy-saving, and environment-protecting, enables an LED lighting lamp array to achieve a communication function. The optical communication device comprises a transmitting end and a receiving end, wherein the transmitting end comprises an LED modulating and driving circuit which is connected with the LED lamp array; the receiving end comprises an LED optical communication receiving circuit; the LED modulating and driving circuit comprises a full wave rectification bridge allowed to connect with an alternate current power supply and composed of four diodes, a direct current and voltage output terminal of the full wave rectification bridge is parallelly connected with an energy storage capacitor, two ends of the energy storage capacitor are connected with a filtering circuit, an output terminal of the filtering circuit is connected with an optical modulating and driving chip, a switch control pin of the chip is connected with a negative electrode of the LED lamp array, a switch pin of the chip is connected with a negative electrode of a voltage stabilizing diode and one terminal of an inductor, and the other terminal of the inductor is connected with the negative electrode of the LED lamp array and one terminal of a protection capacitor; and the receiving circuit comprise a PIN photoelectric detector, an amplification circuit, and a signal processing unit.
Description
Technical field
The utility model relates to optical communication field, particularly relates to a kind of optical communication apparatus based on White-light LED illumination.
Background technology
In recent years, LED lamp, as the lighting apparatus of a kind of low-carbon (LC), energy-saving and environmental protection, is understood by people gradually, is also the strategic new industry of fostering energetically as national and local government in intelligent lighting field.LED is had an optimistic view of by industry with its bright-coloured abundant color, extra long life and extremely strong security performance, gradually common illuminating lamp (as incandescent lamp) has been eliminated out to illumination market.Expert estimates about 2015, and LED illumination will realize universalness.There is research report to show: LED illumination research has again new technology to break through, and can directly carry out the connection of broadband network by LED light a few days ago.
LED lamp is different from conventional illumination device, and it is energy saving not only, also can, by switch motion at a high speed, send modulation signal, completes the transmission of information and instruction.LED is luminous is flickering, flash very high frequency, the speed of switch per second reaches as high as 2,000,000 times, and ceaselessly switch motion can not affect normal illumination use, the naked eyes for people more can not exert an influence to human body, because be 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 have been born the task of transmission information, such as, open just representative " 1 ", close just representative " 0 ", by namely 0 and 1 various combinations of information coding, just can transmit by light, light in air, transmit be just similar in optical fiber communication information in optical fiber, transmit the same, the general principle of Here it is LED visible light communication.LED is as semiconductor device, and the light on and off of this high speed namely make-break capacity of switch are its characteristics, and incandescent lamp is damaged because of being very easy in the change procedure of light on and off, and light on and off transition activities is too slow, thereby does not possess this communication function.The receiving equipment of settling within the scope of LED light-illuminating just can receiving optical signals, and light signal can be converted to the signal of telecommunication, realizes the reception of information, instruction.
Utility model content
The utility model provides a kind of optical communication apparatus based on White-light LED illumination, makes LED illuminating lamp array realize communication function, stable signal transmission, and bandwidth is high, fast response time; And cost is low, energy-conserving and environment-protective.
The technical solution of the utility model 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 being connected with LED lamp array, described receiving terminal comprises LED optical communication receiving circuit;
Described LED modulation drive circuit comprises the full-wave rectification bridge being made up of four diodes that can incoming transport power supply, the DC voltage output end of the described full-wave rectification bridge storage capacitor C1 that is connected in parallel, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R 1 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 R 1 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, light modulation drives the switch control pin CTRL of chip IC to connect the negative pole of LED lamp array, light modulation drives the switch pin SW of chip IC to connect 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 lamp array and one end of protection capacitor C 4, the positive pole of LED lamp array, voltage stabilizing didoe anodal be all connected light modulation and drive the VBAT pin of chip IC with the other end of protection capacitor C 4; Light modulation drives the reseting pin RSET of chip IC to connect the negative output terminal of RC filter circuit by resistance R 2;
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 capacitor C 6, 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 one end of negative pole and the regulating resistance R7 of PIN photodiode D1 by capacitor C 5, the other end of regulating resistance R7 and the emitter of 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 process 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 respectively FPGA system control module and MAC protocol process module, MAC protocol process module interconnection network interface module.
Described LED lamp 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 utility model:
The utility model provides a kind of optical communication apparatus based on White-light LED illumination, makes LED illuminating lamp array realize communication function, has stable signal transmission, and bandwidth is high, the feature of fast response time, and cost is low, energy-conserving and environment-protective.
The transmitting terminal of the utility model device comprises the LED modulation drive circuit being connected with LED lamp array, can incoming transport power supply, strong adaptability, can in wider voltage range, keep efficient, provide stable operating voltage to LED, make the LED can steady operation, meet lighting requirement, and must have very high switching rate just can take into account communication, and therefore adopt light modulation to drive chip IC, there is higher switching rate and power consumption lower; Original binary bit stream, after preliminary treatment and coding, by LED modulation drive circuit driving LED, is carried out intensity modulated to LED, converts electrical signals to light signal; The LED lamp array being connected with LED modulation drive circuit is RGB-LED lamp array, RGB-LED lamp array is to adopt 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, can realize very high transmission rate.
The receiving circuit of the utility model device 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, carry out Digital Signal Processing by signal processing unit again, under the control of FPGA system control module, carry out DSP decoding demodulation by DSP decoder module, transfer out output signal by MAC protocol process module and Network Interface Module.DSP decoder module adopts general or special purpose digital signal processing chip, DSP is had flexibly, accurately, good reliability, volume is little, cost is low, these advantages in the communications field of high arithmetic speed are applied in optical communication, arithmetic speed and the reliability of optical communication are greatly improved, reduce circuit volume, reduced manufacturing cost.
Brief description of the drawings
Fig. 1 is the LED modulation drive circuit structure chart of the utility model device.
Fig. 2 is the LED optical communication receiving circuit structure chart of the utility model device.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is 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 being connected with LED lamp array, receiving terminal comprises LED optical communication receiving circuit.
As shown in Figure 1, be the LED modulation drive circuit structure chart of the utility model device.LED modulation drive circuit comprises the full-wave rectification bridge being made up of four diodes that can incoming transport power supply, the DC voltage output end of the full-wave rectification bridge storage capacitor C1 that is connected in parallel, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R 1 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 R 1 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, light modulation drives the switch control pin CTRL of chip IC to connect the negative pole of LED lamp array, light modulation drives the switch pin SW of chip IC to connect 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 lamp array and one end of protection capacitor C 4, and positive pole, the protection other end of capacitor C 4 and the positive pole of voltage stabilizing didoe of LED lamp array is all connected the VBAT pin of light modulation driving chip IC; Light modulation drives the reseting pin RSET of chip IC to connect the negative output terminal of RC filter circuit by resistance R 2.The LED lamp array being connected with LED modulation drive circuit is RGB-LED lamp array, and RGB-LED lamp array is by red, green, blue three-color LED chip package together, and the light that they send mixes and obtains white light.
As shown in Figure 2, be the LED optical communication receiving circuit structure chart of the utility model device.A kind of LED optical communication receiving 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 capacitor C 6, 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 one end of negative pole and the regulating resistance R7 of PIN photodiode D1 by capacitor C 5, the other end of regulating resistance R7 and the emitter of 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, signal processing unit comprises DSP decoder module, FPGA system control module, MAC protocol process 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 respectively FPGA system control module and MAC protocol process module, MAC protocol process module interconnection network interface module.
In LED optical communication, it is to make LED meet illumination needs that transmitting terminal drives the main task of modulation circuit, has again very high switching rate to meet the needs of transmission data.LED modulation drive circuit of the present utility model comprises the full-wave rectification bridge and the RC filter circuit that go out four diodes compositions that can incoming transport power supply, strong adaptability, can in wider voltage range, keep efficient, provide stable operating voltage to LED, make the LED can steady operation, meet lighting requirement; Adopt light modulation to drive chip IC simultaneously, there is the feature of higher switching rate and lower power consumption, met the needs that transmit data; Original binary bit stream, after preliminary treatment and coding, by LED modulation drive circuit driving LED, is carried out intensity modulated to LED, and the signal of telecommunication is modulated to and on LED light source, is converted to optical signal transmission and goes out.
In LED optical communication, the main task of receiving terminal receiving circuit is with minimum additional noise and distortion, recovers via the entrained information of light carrier after wireless optical transmission.Receiving circuit of the present utility model comprises PIN photoelectric detector, amplifying circuit and signal processing unit, carrying the LED light signal that transmits data focuses on photoelectric detector, first be converted to the signal of telecommunication through photoelectric detector, wherein photoelectric detector is selected PIN photoelectric detector, and PIN photoelectric detector has that quantum efficiency is high, highly sensitive, fast response time, feature that noise is little; Then the signal of telecommunication is amplified to processing, amplifying circuit adopts two-stage triode direct coupling type amplifying circuit, reduces to greatest extent distortion; By signal processing unit, amplifying signal is carried out to Digital Signal Processing again, under the control of FPGA system control module, carry out DSP decoding demodulation by DSP decoder module, decoder module adopts general or special purpose digital signal processing chip, have flexibly, accurately, good reliability, volume is little, cost is low, the feature of high arithmetic speed, the signal that the transmitting terminal recovering by DSP decoder module decoding demodulation sends, then transmit out by MAC protocol process module and Network Interface Module.
Claims (2)
1. the optical communication apparatus based on White-light LED illumination, is characterized in that, comprises transmitting terminal and receiving terminal, and described transmitting terminal comprises the LED modulation drive circuit being connected with LED lamp array, and described receiving terminal comprises LED optical communication receiving circuit;
Described LED modulation drive circuit comprises the full-wave rectification bridge being made up of four diodes that can incoming transport power supply, the DC voltage output end of the described full-wave rectification bridge storage capacitor C1 that is connected in parallel, the two ends of storage capacitor C1 connect RC filter circuit again, one end of the resistance R 1 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 R 1 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, light modulation drives the switch control pin CTRL of chip IC to connect the negative pole of LED lamp array, light modulation drives the switch pin SW of chip IC to connect 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 lamp array and one end of protection capacitor C 4, the positive pole of LED lamp array, voltage stabilizing didoe anodal be all connected light modulation and drive the VBAT pin of chip IC with the other end of protection capacitor C 4; Light modulation drives the reseting pin RSET of chip IC to connect the negative output terminal of RC filter circuit by resistance R 2;
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 capacitor C 6, 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 one end of negative pole and the regulating resistance R7 of PIN photodiode D1 by capacitor C 5, the other end of regulating resistance R7 and the emitter of 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 process 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 respectively FPGA system control module and MAC protocol process module, MAC protocol process 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 lamp 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725078.0U CN203708541U (en) | 2013-11-18 | 2013-11-18 | Optical communication device based on white light LED lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725078.0U CN203708541U (en) | 2013-11-18 | 2013-11-18 | Optical communication device based on white light LED lighting |
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| CN203708541U true CN203708541U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320725078.0U Withdrawn - After Issue CN203708541U (en) | 2013-11-18 | 2013-11-18 | Optical communication device based on white light LED lighting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561525A (en) * | 2013-11-18 | 2014-02-05 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED illumination |
| CN104602416A (en) * | 2015-01-27 | 2015-05-06 | 深圳市洲明科技股份有限公司 | LED (Light Emitting Diode) illuminating lamp |
| CN105429704A (en) * | 2015-11-30 | 2016-03-23 | 上海航天测控通信研究所 | Visible light modulation system for visible light communication |
| CN112840745A (en) * | 2018-10-18 | 2021-05-25 | 昕诺飞控股有限公司 | Determining light settings and/or daylight blocker settings based on data signal quality |
-
2013
- 2013-11-18 CN CN201320725078.0U patent/CN203708541U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103561525A (en) * | 2013-11-18 | 2014-02-05 | 北京格林曼光电科技有限公司 | Optical communication device based on white light LED illumination |
| CN104602416A (en) * | 2015-01-27 | 2015-05-06 | 深圳市洲明科技股份有限公司 | LED (Light Emitting Diode) illuminating lamp |
| CN104602416B (en) * | 2015-01-27 | 2016-04-13 | 深圳市洲明科技股份有限公司 | A kind of LED illumination lamp |
| CN105429704A (en) * | 2015-11-30 | 2016-03-23 | 上海航天测控通信研究所 | Visible light modulation system for visible light communication |
| CN112840745A (en) * | 2018-10-18 | 2021-05-25 | 昕诺飞控股有限公司 | Determining light settings and/or daylight blocker settings based on data signal quality |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20150527 |
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| RGAV | Abandon patent right to avoid regrant |