CN205979241U - A visible light communication LED lamps and lanterns for PAM modulation - Google Patents
A visible light communication LED lamps and lanterns for PAM modulation Download PDFInfo
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- CN205979241U CN205979241U CN201620912864.5U CN201620912864U CN205979241U CN 205979241 U CN205979241 U CN 205979241U CN 201620912864 U CN201620912864 U CN 201620912864U CN 205979241 U CN205979241 U CN 205979241U
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- led
- led drive
- visible light
- light communication
- drive power
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a visible light communication LED lamps and lanterns for PAM modulation mainly includes: a LED lamps and lanterns main part is used for controlling for the illumination the LED of LED lamps and lanterns drive modulated circuit and be used for the LED power supply circuit of power supply. The visible light communication transmitter can be regarded as to lamps and lanterns to the pulse amplitude modulation technique is used, the narrow data transmission rate's to the visible light communication system of LED modulation bandwidth restriction can be solved among the visible light communication. Adopt 44 LED arrays as visible light communication's information source, realize 16 grades pulse amplitude modulation through a bright number that goes out of controlling 16 white light LED chips, can transmit 4 binary data in a clock cycle. The utility model discloses a do not increasing under the device bandwidth prerequisite, improving radio communication's quality and data transmission rate at double. Additionally, the drive circuit of lamps and lanterns is together integrated with modulated circuit, installs in lamps and lanterns main part the inside, and simple structure, and wide application prospect has.
Description
Technical field
This utility model is related to technical field of visible light communication, more particularly, to a kind of visible light communication for PAM modulation
LED lamp.
Background technology
In recent years, the semiconductor lighting devices LED being described as " green illumination " has developed rapidly, enjoys people to close
Note.Compared to lighting sources such as traditional electric filament lamp, LED has that low-power consumption, life-span length, size be little, environmental protection the features such as.With
When, LED also has that modulating performance is good, response sensitivity is high, the no advantage such as electromagnetic interference, can be by signal with human eye None- identified
High frequency is transmitted, and the frequency range of the light that LED sends does not need frequency range permission, can be realized with a low cost high bandwidth and two-forty
Radio communication, thus expedite the emergence of out one and be capable of illuminating and the technology visible light communication technology of communicating integral.
Occur so far from the concept of visible light communication in 2000, laboratory has been carried out by the use of White-light LED chip as light
Source meets illumination and the requirement communicating simultaneously.However, the limited modulation bandwidth of White-light LED chip be maximum challenge in VLC it
One.General fluorescent material LED modulation bandwidth only has several megahertzs, and message transmission rate is restricted.When using NRZ OOK modulation
When, transfer rate typically can only achieve 10Mbit/s.For lift system message transmission rate, except from White-light LED chip
Structure, bandwidth is expanded on the design of drive circuit, system overall bandwidth can also be improved by different modulation systems, as from
Scattered multitone modulation（DMT）, quadrature amplitude modulation（QAM）, OFDM（OFDM）Deng；Can also be by different modulation methods
Formula combines, such as MIMO-OFDM, PPM-PWM, pulse and OFDM dual modulation technology etc..However, these technology greatly increase
The complexity of system.
Therefore, be extremely necessary to develop a kind of based on new modulation technique and simple visible light communication LED
Tool, meets the bandwidth demand of system, thus realizing the high-speed transfer of signal while providing illumination.
Utility model content
In order to overcome disadvantages mentioned above and the deficiency of prior art, the utility model proposes a kind of fitting structure, this light fixture
Structure can realize PAM modulation, thus under the premise of not increasing bandwidth of a device, can significantly improve quality and the data of radio communication
Transfer rate.
A kind of visible light communication LED lamp for PAM modulation, including lamp housing, and the LED drive circuit being located in lamp housing
Substrate, the SMA interface above lamp housing, the guide-lighting mask below lamp housing and LED drive power.LED drive circuit
2 are arranged on substratenThe individual White-light LED chip for visible light communication, n is positive integer；Described LED drive power is that 220V is whole
Current circuit module, drives the working power of modulation circuit as LED drive circuit base onboard led.
Further, each White-light LED chip drives modulation circuit to carry out independent control by corresponding LED；Described LED drives
LED on galvanic electricity base board drives modulation circuit to include voltage stabilizing IC, metal-oxide-semiconductor, deserializer, current-limiting resistance, two filtered electrical
Appearance, White-light LED chip and protection diode；Described voltage stabilizing IC input pole is connected with LED drive power positive pole, earth polar and LED
Driving power supply negative pole is connected；Metal-oxide-semiconductor grid is connected with the parallel output terminal of deserializer, source electrode and LED drive power negative pole
It is connected；The serial input terminal of deserializer is connected with SMA interface, and one of parallel output terminal is connected with metal-oxide-semiconductor grid；Limit
Leakage resistance is connected across after being connected with White-light LED chip between voltage stabilizing IC output stage and LED drive power negative pole；Two filter capacitors
It is connected across respectively between voltage stabilizing IC input pole and LED drive power negative pole, voltage stabilizing IC output stage and LED drive power negative pole；Protect
Shield diode is serially connected between voltage stabilizing IC input pole and LED drive power positive pole, has reverse power connection protective effect.
Further, it is also equipped with radiator in described lamp housing, described radiator is connected with guide-lighting mask.
Further, described LED drive power is arranged on the top of radiator by support, if the outer wall of radiator has
Dry radiating fin；The operating current that LED drive power can drive modulation circuit to the LED in LED drive circuit substrate is adjusted
System.
Further, control signal, after SMA interface, is converted into parallel output signal by deserializer, by control
LED on LED drive circuit substrate processed drives modulation circuit that every lamp is independently controlled, and realizes to White-light LED chip
The control of light on and off small cup number.
Further, the tune pulse amplitude technology that described light fixture adopts, for changing the pulse of spike train according to certain rules
Amplitude to adjust light output amount and the waveform of light fixture, that is, is passed through the LED on LED drive circuit substrate and drives modulation circuit to control 16
The light on and off small cup number of small cup lamp, to realize the modulation system of 16 kinds of different luminance levels, thus realizing 16 grades of pulse amplitude modulation,
Reach the purpose transmitting 4 bit binary number signals within a clock cycle.
Further, described n is 4.
Further, the packaged type of White-light LED chip adopts COB to encapsulate.
Compared with prior art, this utility model has following clear advantage and effect：
（1）This utility model is based on simple PAM modulation technique, and the pulse amplitude changing spike train according to certain rules is come
Adjust light output amount and the waveform of light fixture, drive modulation circuit to control the light on and off small cup number of 16 lamps by LED, to realize 16 kinds
The modulation system of different luminance levels, compared with based on traditional OFDM modulation, DMT modulation technique etc., enormously simplify system
Complexity, and can exponentially improve the quality of radio communication and channel on the premise of not increasing LED component bandwidth
Capacity.
（2）This utility model, by using the White-light LED chip array of a 4*4, realizes 16 grades of pulse-amplitude modulation,
Compared to the visible light communication system of traditional use OOK control technique, system data transfer rate can be lifted 4 times.
Brief description
Fig. 1 is axonometric chart of the present utility model.
Fig. 2 is sectional view of the present utility model.
Fig. 3 is explosive view of the present utility model.
Fig. 4 is that in this utility model, LED drives modulation circuit figure.
Fig. 5 is pulse-amplitude modulation mode figure of the present utility model.
Description of reference numerals：1-LED drive circuit substrate, 2-LED array light source, 3- radiator, 4-SMA interface, 5- lead
Light mask, 6-LED driving power supply, 7- division board, 8- centring ring, 9- fixed screw, 10- fixed screw, 11- division board perforate.
Specific embodiment
With reference to embodiment and accompanying drawing, this utility model is described in further detail, but reality of the present utility model
Apply mode not limited to this.
Embodiment 1
For the ease of understanding this utility model, with reference to concrete accompanying drawing and enforcement, this utility model is made furtherly
Bright.
As depicted in figs. 1 and 2, in order to improve visible light communication speed, a kind of visible light communication LED for PAM modulation
Light fixture includes LED drive power 6, LED drive circuit substrate 1 and lamp housing, and described LED drive circuit substrate 1 arranges LED array
Light source 2 is used for visible light communication, and the White-light LED chip in described LED array light source 2 is all using COB encapsulating structure.
The light source of described LED lamp adopts the White-light LED chip array of the COB encapsulation of a 4*4, and described each is white
Light LED chip drives modulation circuit independent control by the LED that single OOK modulates, every on described LED drive circuit substrate 1
Individual LED drives modulation circuit by voltage stabilizing IC, metal-oxide-semiconductor, deserializer, current-limiting resistance, two filter capacitors, White-light LED chips
And protection diode composition；Described voltage stabilizing IC input pole is connected with LED drive power 6 positive pole, earth polar and LED drive power 6
Negative pole is connected, and the output stage of voltage stabilizing IC is provided that the burning voltage driving needed for White-light LED chip；Metal-oxide-semiconductor grid with go here and there and turn
The parallel output terminal of parallel operation is connected, and source electrode is connected with LED drive power 6 negative pole, is realized single by metal-oxide-semiconductor ON-OFF control circuit break-make
The light on and off of individual White-light LED chip control；The serial input terminal of deserializer is connected with SMA4, one of parallel output terminal with
Metal-oxide-semiconductor grid is connected, for realizing the serioparallel exchange of control signal；Current-limiting resistance is connected across after being connected with White-light LED chip surely
Between pressure IC output stage and LED drive power 6 negative pole, play current-limiting protection effect；Two filter capacitors are connected across voltage stabilizing IC respectively
It is ensured that input and output electric current between input pole and LED drive power 6 negative pole, voltage stabilizing IC output stage and LED drive power 6 negative pole
Stablize；Protection diode is serially connected between voltage stabilizing IC input pole and LED drive power 6 positive pole, has reverse power connection protection and makees
With.
Specifically, using 4*4 White-light LED chip array as the light source of light fixture, can achieve that 16 grades of light intensity amplitude is adjusted
System, in the premise not increasing drive circuit complexity, can exponentially improve the speed of visible light communication.
White-light LED chip in LED array light source 2 in this utility model embodiment, all using COB encapsulating structure, has scattered
The advantages of heat energy power is strong, improves the stability of optic communication.
Described LED drive power 6 circuit module is common 220V Direct Rectifying Circuit on market, rectification circuit principle
Known to those skilled in the art, here is omitted.
Described lamp housing adopts radiator 3, and the bottom of described radiator 3 is provided with guide-lighting mask 5, described radiator 3
It is connected with LED drive circuit substrate 1 by fin.
Top setting LED drive power 6 outside described radiator 3, described LED drive power 6 passes through support by solid
Determine the top that screw is fixed on outside radiator 3, the outer wall of radiator 3 has some radiating fins, and described LED drive power 6 is made
Drive the working power of modulation circuit for the LED on LED drive circuit substrate 1, and can be to the LED on LED drive circuit substrate 1
The operating current of drive circuit is modulated.
In this utility model embodiment, LED drive power 6 can be electrically connected with external communication, when LED drive power 6 is passed through
After normal power cord is electrically connected with external communication, and external communication electricity is changed into unidirectional current, can be LED drive circuit substrate 1
LED drive modulation circuit offer work needed for electric current and voltage, the bottom of described radiator 3 is provided with guide-lighting mask 5.Radiating
Device 3 is in hood-like, and guide-lighting mask 5 is in hemispherical, and certain fitting structure can also adopt other forms, specifically no longer enumerates.
Described leaded light mask 5 is provided with centring ring 8, and radiator 3 is located in centring ring 8, radiator 3 utilize centring ring 8 with
Guide-lighting mask 5 is installed and is fixed.
Three fixed screws 9 are provided with described radiator 3, described LED drive circuit substrate 1 is provided with four fixing spiral shells
Whole light fixture ingredient can be arranged on desired position by fixed screw, be installed using fixed screw by silk 10
Fixing, it is the technological means that the art is commonly used, the concrete structure of screw and screw is known to those skilled in the art, this
Place repeats no more.
Described LED drive power 6 and LED drive circuit substrate 1 are mutually isolated by division board 7, and division board 7 has perforate
11, holding wire can be connected with LED drive circuit substrate 1 through perforate 11 with power line, provides LED drive circuit substrate 1 institute
The driving current needing and modulated signal.
Described LED drive power 6 is arranged on the top outside radiator 3 by support, and the outer wall of radiator 3 has some dissipating
Hot fin, can improve the area of dissipation of radiator 3 by radiating fin, improve radiating efficiency it is ensured that to LED drive circuit base
The radiating effect of plate 1.LED drive circuit substrate 1 described in the present embodiment is using aluminium base so that having preferably scattered
Thermal effect, LED drive circuit substrate 1 can also be using conventional other materials in addition.
Described LED drive circuit substrate 1 is powered by LED drive power 6, and LED drive power is defeated after voltage stabilizing IC
Go out stable voltage, provide driving voltage for White-light LED chip, and the light on and off situation of White-light LED chip is by this N ditch type metal-oxide-semiconductor
It is controlled.When parallel output terminal output " 1 " of deserializer, metal-oxide-semiconductor is in the conduction state, and White-light LED chip is lighted；
When parallel output terminal output " 0 " of deserializer, metal-oxide-semiconductor is in cut-off state, and White-light LED chip extinguishes.Described all
LED drive modulation circuit only one of which deserializer, described deserializer has at least 16 parallel output terminals, each
Parallel output terminal all connects one by voltage stabilizing IC, metal-oxide-semiconductor, current-limiting resistance, two filter capacitors, White-light LED chip and protection
The circuit of diode composition.
Described LED drive circuit substrate 1 receives the control signal from SMA interface 4 by data wire, by deserializer
The control signal of serial input is converted into the signal of parallel output, then drives modulation circuit to control different numbers white through LED
The light on and off of light LED chip, realize 16 kinds of different luminance levels, and then reach clock cycle transmission 4 bit binary number
Signal, and transfer rate is higher than traditional speed that can be reached using light on and off keyed modulation systems 4 times, specifically each LED
Drive modulation circuit as shown in Figure 4.As shown in figure 5, providing the information that 4 various amplitude ranks represent respectively, to be illustrated with this
Pulse-amplitude modulation mode.Such as " 1010 " represent the 10th grade of amplitude, and the serial input terminal of deserializer receives and connects from SMA
The signal " 1010 " of mouth 4, after deserializer, its parallel output terminal exports 10 high level and 6 low levels, by lighting
10 pieces of LED chips represent " 1010 " this 4 bit binary number signal.As shown in 4 × 4 grids below coordinate axess, wherein
It is bright that 10 black box represent LED, and 6 white boxes then represent and go out.In the same manner, " 1100 ", " 0100 ", " 0111 " generation respectively
The 12nd grade of table, the 4th grade, the 7th grade.
Above-described embodiment is only a kind of embodiment of the present utility model, but embodiment of the present utility model is not subject to
State the restriction of embodiment, other any without departing from the change made under spirit of the present utility model and principle, modify, replace
Generation, combination, simplification all should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (5)
1. a kind of visible light communication LED lamp for PAM modulation, including lamp housing, and the LED drive circuit base being located in lamp housing
Plate（1）, be located at lamp housing above SMA interface（4）, be located at lamp housing below guide-lighting mask（5）And LED drive power（6）；Its
It is characterised by：LED drive circuit substrate（1）Upper setting 2nThe individual White-light LED chip for visible light communication, n is positive integer；Institute
The LED drive power stated（6）For 220V rectification circuit module, as LED drive circuit substrate（1）Upper LED drives modulation circuit
Working power.
2. a kind of visible light communication LED lamp for PAM modulation according to claim 1 it is characterised in that：Each is white
Light LED chip drives modulation circuit to carry out independent control by corresponding LED；Described LED drive circuit substrate（1）On LED drive
Modulation circuit includes voltage stabilizing IC, metal-oxide-semiconductor, deserializer, current-limiting resistance, two filter capacitors, White-light LED chip and protection
Diode；Described voltage stabilizing IC input pole and LED drive power（6）Positive pole is connected, earth polar and LED drive power（6）Negative pole is connected；
Metal-oxide-semiconductor grid is connected with the parallel output terminal of deserializer, source electrode and LED drive power（6）Negative pole is connected；Deserializer
Serial input terminal and SMA interface（4）It is connected, one of parallel output terminal is connected with metal-oxide-semiconductor grid；Current-limiting resistance and white light
It is connected across voltage stabilizing IC output stage and LED drive power after LED chip series connection（6）Between negative pole；Two filter capacitors bridge respectively
Input pole and LED drive power in voltage stabilizing IC（6）Negative pole, voltage stabilizing IC output stage and LED drive power（6）Between negative pole；Protection
Diode is serially connected in voltage stabilizing IC input pole and LED drive power（6）Between positive pole, there is reverse power connection protective effect.
3. a kind of visible light communication LED lamp for PAM modulation according to claim 1 it is characterised in that：Described
It is also equipped with radiator in lamp housing（3）, described radiator（3）With guide-lighting mask（5）It is connected.
4. a kind of visible light communication LED lamp for PAM modulation according to claim 3 it is characterised in that：Described
LED drive power（6）Radiator is arranged on by support（3）Top, radiator（3）Outer wall there are some radiating fins；
LED drive power（6）Can be to LED drive circuit substrate（1）In LED drive modulation circuit operating current be modulated.
5. a kind of visible light communication LED lamp for PAM modulation according to claim 1 it is characterised in that：Described n
For 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620912864.5U CN205979241U (en) | 2016-08-20 | 2016-08-20 | A visible light communication LED lamps and lanterns for PAM modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620912864.5U CN205979241U (en) | 2016-08-20 | 2016-08-20 | A visible light communication LED lamps and lanterns for PAM modulation |
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| Publication Number | Publication Date |
|---|---|
| CN205979241U true CN205979241U (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620912864.5U Expired - Fee Related CN205979241U (en) | 2016-08-20 | 2016-08-20 | A visible light communication LED lamps and lanterns for PAM modulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151903A (en) * | 2016-08-20 | 2016-11-23 | 华南理工大学 | A kind of visible light communication LED lamp for PAM modulation |
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2016
- 2016-08-20 CN CN201620912864.5U patent/CN205979241U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151903A (en) * | 2016-08-20 | 2016-11-23 | 华南理工大学 | A kind of visible light communication LED lamp for PAM modulation |
| CN106151903B (en) * | 2016-08-20 | 2023-02-14 | 华南理工大学 | Visible light communication LED lamp for PAM modulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20190820 |