CN204598359U - A kind of many light fixture networking drive circuits for visible light communication - Google Patents
A kind of many light fixture networking drive circuits for visible light communication Download PDFInfo
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- CN204598359U CN204598359U CN201520015572.7U CN201520015572U CN204598359U CN 204598359 U CN204598359 U CN 204598359U CN 201520015572 U CN201520015572 U CN 201520015572U CN 204598359 U CN204598359 U CN 204598359U
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Abstract
A kind of many light fixture networking drive circuits for visible light communication, comprise transmission main controller, after single-ended signal is converted to differential signal by the difference transtation mission circuit in transmission main controller, be connected by the input of twisted-pair feeder with transmission iversion controller, transmission iversion controller also has a parallel outputs, and the input of an adjacent transmission iversion controller is connected with the parallel outputs that another transmits iversion controller; The input of transmission iversion controller is differential signal receiving circuit, differential signal receiving circuit is converted to the single-ended signal identical with visible ray modulation signal A again, carries out electric isolution and output to the input of modulating driver from the output of differential receive circuitry through buffer circuit; Modulating driver is switched capacitor square wave effective value constant-flow driver, and the signal B on the input of modulating driver is identical with visible ray modulation signal A; Achieve the high efficiency electrical/optical conversion of visible light communication signal, the requirement that optimal drive mode one constant current meeting LED illumination light source drives.
Description
Technical field
The utility model relates to technical field of visible light communication, is specifically related to a kind of many groups LED lamp networking drive circuit of visible light communication technology.
Background technology
In the prior art, the now ripe LED illumination light source (as LED fluorescent lamp tube, LED flat lamp, LED ceiling light, LED, LED lamp bar, LED spotlight, LED string, LED down etc.) also produced in enormous quantities is utilized as the signal transmitting unit of visible light communication, by the cost of minimizing visible light communication, to reduce the door that visible light communication technology comes into the market, the penetration and promotion speed accelerating visible light communication technology.The modulation signal of visible light communication being transmitted and is loaded into and organizes LED illumination light source more, is the key problem in technology and the difficult point that realize above-mentioned imagination.
Summary of the invention
The purpose of this utility model is to provide a kind of being transferred to by visible ray modulation signal and organizes LED illumination light source more, and while carrying out constant current driving to LED, load-modulate signal, converts electrical signals to light signal.Thus can using the signal transmitting unit of existing multiple LED illumination light source as visible light communication.Visible light communication system with low cost is realized under the prerequisite ensureing high speed, high reliability.
A kind of many light fixture networking drive circuits for visible light communication are provided, comprise the transmission main controller for inputting visible ray modulation signal A, signal isolation circuit is provided with in described transmission main controller, the difference transtation mission circuit be connected with buffer circuit output, after single-ended signal is converted to differential signal by difference transtation mission circuit, be connected with many inputs transmitting iversion controller transmitted in iversion controller by a pair twisted-pair feeder, every only transmission iversion controller also has a parallel outputs, the input of an adjacent transmission iversion controller is connected with the parallel outputs that another transmits iversion controller, the input of described transmission iversion controller is differential signal receiving circuit, differential signal receiving circuit is converted to the single-ended signal identical with visible ray modulation signal A again, export from the output of differential receive circuitry, carry out electric isolution through buffer circuit and output on the input of modulating driver, signal B on the input of modulating driver is identical with visible ray modulation signal A, modulating driver is connected with LED illumination lamp.
Above-mentioned in many light fixture networking drive circuits of visible light communication, described modulating driver is switched capacitor square wave effective value constant-flow driver, is electrically connected forms by energy storing of switch electric capacity, high-speed MOSFET driver device and high speed MOSFET power tube; Modulating driver is embedded in LED illumination lamp; Constant-flow driver in LED illumination lamp and LED group change after former connected mode to be reintegrated with the energy storing of switch electric capacity in modulating driver, high-speed MOSFET driver device, high speed MOSFET power tube and is connected; Energy storing of switch Capacitance parallel connection is in the output of constant-flow driver, LED group is connected in the positive output end of constant-flow driver and the drain D of high speed MOSFET power tube, the output that the source S of MOSFET power tube is connected with the negative output terminal of constant-flow driver, grid G receives high-speed MOSFET driver device; Visible ray modulation signal B receives on the input of high-speed MOSFET driver device, through current drives, output signal is added to the grid G of MOSFET power tube, the fast conducting of control MOSFET power tube and cut-off.
In the utility model, buffer circuit can use the digital buffer circuit of Phototube Coupling, Magnetic isolation and Capacitor apart mode.
LED constant-current driver in LED illumination lamp, LED group can use special LED group and LED constant-current driver, also directly can use above-mentioned parts contained in existing LED lamp.Wherein LED group can use tandem type or connection in series-parallel combined, LED constant-current driver can use interchange or direct current input the various circuit form such as switch mode constant current, linear constant current.
The utility model compared with prior art, there is obvious advantage and effect: visible ray modulation signal carries out transmitting and distributing by RS-485 technology or M-LVDS technology in a differential manner, effectively can suppress the electromagnetic interference of self, have that anti-external disturbance ability is strong, communication range is large, distance and the high feature of transmission speed.A transmission main controller can be realized to the Point To Multipoint Multicast formula Signal transmissions reaching 32-256 group LED lamp.Owing to employing buffer circuit before difference transtation mission circuit He after differential receive circuitry, the hop of visible light communication system and system other parts are isolated, serve the effect that Secure isolation, noise isolation and ground loop are eliminated, antijamming capability improves further, and surge voltage, peak voltage can be prevented the destruction of system.The capacitance switch formula square wave effective value constant current method that modulating driver adopts, not only achieves the high efficiency electrical/optical conversion of visible light communication signal, the requirement that the optimal drive mode-constant current simultaneously also meeting LED illumination light source drives.In a word, a kind of many light fixture networkings for visible light communication that the utility model provides and driving method, directly can utilize the now ripe many groups LED illumination light source also produced in enormous quantities, do not affect illumination performance prerequisite under, achieve high efficiency visible light communication signal madulation, have the advantages that electric signal transmission is reliable and stable, light signal area coverage is large and system cost is low, installation enforcement quantities is little, the popularization and application of visible light communication technology can be promoted.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the connecting circuit schematic diagram that modulating driver of the present utility model adopts outflow of bus current (Current Source) pattern and LED illumination lamp.
Fig. 3 be another kind of topological structure of the present utility model modulating driver adopt electric current to flow into the connecting circuit schematic diagram of (Current Sink) pattern and LED illumination lamp.
Mark in figure: 1: transmission main controller, 11: buffer circuit, 12: difference transtation mission circuit;
2: twisted-pair feeder; 3: transmission iversion controller, 32: differential receive circuitry, 31: buffer circuit; 4: modulating driver; 5:LED lighting, 51:LED constant-flow driver, 52:LED lamp group.
Embodiment
Embodiment one: with reference to Fig. 1, shown in Fig. 2: a kind of many light fixture networking drive circuits for visible light communication are provided, comprise the transmission main controller 1 for inputting visible ray modulation signal A, signal isolation circuit 11 is provided with in described transmission main controller 1, the difference transtation mission circuit 12 be connected with buffer circuit 11 output, after single-ended signal is converted to differential signal by difference transtation mission circuit 12, be connected with many inputs transmitting iversion controller 3 transmitted in iversion controller 3 by a pair twisted-pair feeder 2, every only transmission iversion controller 3 also has a parallel outputs, the input of an adjacent transmission iversion controller 3 is connected with the parallel outputs that another transmits iversion controller 3, the input of described transmission iversion controller 3 is differential signal receiving circuits 32, differential signal receiving circuit 32 is converted to the single-ended signal identical with visible ray modulation signal A again, export from the output of differential receive circuitry 32, carry out electric isolution through buffer circuit 31 and output on the input of modulating driver 4, signal B on the input of modulating driver 4 is identical with visible ray modulation signal A, modulating driver is connected with LED illumination lamp 5.
Above-mentioned in many light fixture networking drive circuits of visible light communication, described modulating driver 4 is switched capacitor square wave effective value constant-flow drivers 51, is electrically connected forms by energy storing of switch electric capacity 41, high-speed MOSFET driver device 42 and high speed MOSFET power tube 43; Modulating driver 4 is embedded in LED illumination lamp; Constant-flow driver 51 in LED illumination lamp and LED group change after former connected mode to be reintegrated with the energy storing of switch electric capacity in modulating driver, high-speed MOSFET driver device, high speed MOSFET power tube and is connected; Energy storing of switch Capacitance parallel connection is in the output of constant-flow driver, LED group is connected in the positive output end of constant-flow driver and the drain D of high speed MOSFET power tube, the output that the source S of MOSFET power tube is connected with the negative output terminal of constant-flow driver, grid G receives high-speed MOSFET driver device; Visible ray modulation signal B receives on the input of high-speed MOSFET driver device, through current drives, output signal is added to the grid G of MOSFET power tube, the fast conducting of control MOSFET power tube and cut-off.
Embodiment two: with reference to shown in Fig. 3 is changed into by the topological structure in embodiment one adopting the modulating driver of electric current inflow pattern and the connecting circuit schematic diagram of LED illumination lamp.
Adopt the modulating driver of electric current inflow pattern and the connecting circuit of LED illumination lamp; Modulating driver 4 is switched capacitor square wave effective value constant-flow driver, is made up of energy storing of switch electric capacity 41, high-speed MOSFET driver device 42 and high speed MOSFET power tube 43.Modulating driver 4 is embedded in LED illumination lamp 5.Constant-flow driver 51 in LED illumination lamp 5 and LED group 52 change after former connected mode to be reintegrated with the energy storing of switch electric capacity 41 in modulating driver 4, high-speed MOSFET driver device 42, high speed MOSFET power tube 43 and is connected.In constant-flow driver 51, constant-current source connects into " inflow " (Current Sink) pattern.Energy storing of switch electric capacity 41 be parallel to constant-flow driver 51 Constant current input end and publicly between, LED group 52 is connected between the power supply positive supply of constant-flow driver 51 and the drain D of high speed MOSFET power tube 43, the output that the source S of MOSFET power tube 43 is connected with the constant current input of constant-flow driver 51, grid G receives high-speed MOSFET driver device 42.Visible ray modulation signal B receives on the input of high-speed MOSFET driver device 42, through current drives, output signal is added to the grid G of MOSFET power tube 43, the fast conducting of control MOSFET power tube and cut-off.Constant-flow driver 51 constant current input, energy storing of switch electric capacity 41, mosfet driver 42 and be on off state the acting in conjunction of MOSFET power tube 43 under, the square wave current effective value flow through in LED group 52 is equal with the electric current I 1 that constant-flow driver inputs, and reaches the effect that square wave current effective value is constant.
Foregoing circuit had both met the needs that the constant current of LED group drives, and achieved again the high efficiency electrical/optical conversion of visible light communication signal.
Claims (3)
1. the many light fixture networking drive circuits for visible light communication, it is characterized in that: comprise the transmission main controller for inputting visible ray modulation signal A, signal isolation circuit is provided with in described transmission main controller, the difference transtation mission circuit be connected with buffer circuit output, after single-ended signal is converted to differential signal by difference transtation mission circuit, be connected with many inputs transmitting iversion controller transmitted in iversion controller by a pair twisted-pair feeder, every only transmission iversion controller also has a parallel outputs, the input of an adjacent transmission iversion controller is connected with the parallel outputs that another transmits iversion controller, the input of described transmission iversion controller is differential signal receiving circuit, differential signal receiving circuit is converted to the single-ended signal identical with visible ray modulation signal A again, export from the output of differential receive circuitry, carry out electric isolution through buffer circuit and output on the input of modulating driver, signal B on the input of modulating driver is identical with visible ray modulation signal A, modulating driver is connected with LED illumination lamp.
2. the many light fixture networking drive circuits for visible light communication according to claim 1, it is characterized in that: modulating driver is switched capacitor square wave effective value constant-flow driver, is made up of energy storing of switch electric capacity, high-speed MOSFET driver device and high speed MOSFET power tube; Modulating driver is embedded in LED illumination lamp; Constant-current source in constant-flow driver is connected into " outflow " pattern; Energy storing of switch Capacitance parallel connection is in the output of constant-flow driver, LED group is connected between the positive output end of constant-flow driver and the drain D of high speed MOSFET power tube, MOSFET power, the output that the source S of pipe is connected with the negative output terminal of constant-flow driver, grid G receives high-speed MOSFET driver device; Visible ray modulation signal B receives on the input of high-speed MOSFET driver device, through current drives, output signal is added to the grid G of MOSFET power tube, the fast conducting of control MOSFET power tube and cut-off.
3. the many light fixture networking drive circuits for visible light communication according to claim 1, it is characterized in that: described modulating driver is the switched capacitor square wave effective value constant-flow driver adopting electric current inflow pattern to be connected with LED illumination lamp, is made up of energy storing of switch electric capacity, high-speed MOSFET driver device and high speed MOSFET power tube; Modulating driver is embedded in LED illumination lamp; In constant-flow driver, constant-current source connects into " inflow " pattern; Energy storing of switch Capacitance parallel connection in constant-flow driver Constant current input end and publicly between, LED group is connected between the power supply positive supply of constant-flow driver and the drain D of high speed MOSFET power tube, the output that the source S of MOSFET power tube is connected with the constant current input of constant-flow driver, grid G receives high-speed MOSFET driver device; Visible ray modulation signal B receives on the input of high-speed MOSFET driver device, through current drives, output signal is added to the grid G of MOSFET power tube, the fast conducting of control MOSFET power tube and cut-off.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848372A (en) * | 2015-01-12 | 2016-08-10 | 贵州省计量测试院 | Multi-lamp networking drive circuit and method for visible communication |
| CN108234267A (en) * | 2018-02-08 | 2018-06-29 | 卡斯柯信号有限公司 | A kind of communication system based on M-LVDS how main high-speed buses in real time |
| CN109814399A (en) * | 2019-01-30 | 2019-05-28 | 吕树人 | The smart home system of carrier wave between a kind of zero curve based on ground |
| CN110126670A (en) * | 2019-06-06 | 2019-08-16 | 包建军 | Using general-purpose device structure simply distribution BMS |
| CN111511075A (en) * | 2020-06-04 | 2020-08-07 | 大峡谷照明***（苏州）股份有限公司 | Drive circuit and lamp |
-
2015
- 2015-01-12 CN CN201520015572.7U patent/CN204598359U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848372A (en) * | 2015-01-12 | 2016-08-10 | 贵州省计量测试院 | Multi-lamp networking drive circuit and method for visible communication |
| CN108234267A (en) * | 2018-02-08 | 2018-06-29 | 卡斯柯信号有限公司 | A kind of communication system based on M-LVDS how main high-speed buses in real time |
| CN108234267B (en) * | 2018-02-08 | 2023-11-07 | 卡斯柯信号有限公司 | Communication system based on M-LVDS real-time multi-master high-speed bus |
| CN109814399A (en) * | 2019-01-30 | 2019-05-28 | 吕树人 | The smart home system of carrier wave between a kind of zero curve based on ground |
| CN110126670A (en) * | 2019-06-06 | 2019-08-16 | 包建军 | Using general-purpose device structure simply distribution BMS |
| CN110126670B (en) * | 2019-06-06 | 2022-09-30 | 包建军 | Distributed BMS employing universal devices |
| CN111511075A (en) * | 2020-06-04 | 2020-08-07 | 大峡谷照明***（苏州）股份有限公司 | Drive circuit and lamp |
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Inventor after: Shen Li Inventor after: Hu Pengfei Inventor after: Han Feng Inventor after: Yang Nan Inventor after: Liu Liping Inventor after: Song Maojiang Inventor after: Yang Fei Inventor before: Hu Pengfei Inventor before: Han Feng Inventor before: Yang Nan Inventor before: Liu Liping Inventor before: Song Maojiang Inventor before: Yang Fei |
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