CN106027145A - Visible light communication switching and controlling method - Google Patents
Visible light communication switching and controlling method Download PDFInfo
- Publication number
- CN106027145A CN106027145A CN201610472667.0A CN201610472667A CN106027145A CN 106027145 A CN106027145 A CN 106027145A CN 201610472667 A CN201610472667 A CN 201610472667A CN 106027145 A CN106027145 A CN 106027145A
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- Prior art keywords
- resistance
- switching
- visible light
- light communication
- switch
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1143—Bidirectional transmission
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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]
Abstract
The invention discloses a visible light communication switching and controlling method. A power supply supplies power to an LED lamp; a variable resistance module (Rx) is connected in a power supply loop of the LED lamp in series; a switching circuit (Q1) is connected with the variable resistance module in parallel; a switching signal is sent through a controller so as to adjust the resistance value of the variable resistance module, so that the brightness of the LED lamp is adjusted; a communication signal is sent through the controller so as to control on and off of the switching circuit, so that the LED lamp is turned on and turned off; therefore, data transmission is realized; resistance switching is realized by adopting the array type variable resistance module; the variable resistance module is a resistance array composed of M*N resistors and M+N switches; both M and N are natural numbers which are greater than 2; the M+N switches are controlled by the switching signal output by the controller; and the resistance values of any two resistors are different. By means of the visible light communication switching and controlling method, multi-stage dimming can be realized; and the visible light communication switching and controlling method is easy to implement and control.
Description
Technical field
The present invention relates to a kind of visible light communication switching and control method.
Background technology
In visible light communication system, the on and off by LED (On and Off) are needed to realize signal transmission, but in actual application, the light intensity of LED luminescence needs to adjust at any time, in existing brightness adjustment mode, the progression of light modulation is few, it is therefore necessary to design a kind of visible light communication device that can support multistage light modulation.
Summary of the invention
The technical problem to be solved is to provide a kind of visible light communication switching and control method, and the switching of this visible light communication and control method can realize multistage light modulation, it is easy to implement, it is easy to control.
The technical solution of invention is as follows:
A kind of visible light communication switching and control method, powered to LED by power supply, is serially connected with variable resistance module (Rx), on-off circuit (Q1) and variable resistance wired in parallel in the current supply circuit of LED；
Send switching signal by controller and adjust the resistance of variable resistance module to regulate the brightness of LED；
Send signal of communication by controller to control the break-make of on-off circuit and realize the on and off of LED, thus realize the transmission of data；
The variable resistance module using array realizes the switching of resistance；
Described variable resistance module is to be switched, by M*N resistance and M+N, the electric resistance array formed；M and N is the natural number more than 2；M+N switch is controlled by the switching signal of controller output, and the resistance of any two resistance is different.
Having M bar x wire and N bar vertical line in electric resistance array, M bar x wire is all connected to common point P, N bar vertical line and is all connected to common point S；P point and 2 end points that S point is variable resistance module；
The M bar x wire of electric resistance array is serially connected with M laterally switch respectively；N bar vertical line is serially connected with N number of longitudinal switch respectively；
In M*N resistance, one x wire of termination of any one resistance, another terminates vertical line；M laterally switchs M the I/O port being controlled by controller, and N number of longitudinal switch is controlled by N number of I/O port of controller；Laterally switch is between resistance and P point；Longitudinal switch is between resistance and S point；
Any one laterally switch and arbitrary longitudinal opening and closing conjunction, then have a resistance to connect between P and S point.Horizontal and vertical refer in logic horizontal and vertical, the most actually need laterally or longitudinally to arrange.
M and N is 3, and resistance is 9.
By the background light intensity that light intensity detection circuit detection is on-the-spot, emphasize the luminosity of whole LED based on bias light.Background light intensity is the biggest, then the luminosity of LED is the biggest, it is ensured that LED emits beam and there is the contrast of necessity between background light, in order to signal identification.
The resistance of resistance is linearly incremented by, and the resistance of M*N resistance is respectively R, 2R, 3R ..., (M*N-1) * R and M*N*R, R is resistance value, such as 100 ohm, or 1 kilohm.
The resistance of resistance is exponentially incremented by, and the resistance of M*N resistance is respectively R, 2R, 4R ..., 2^(M*N-2) * R and 2^(M*N-1) * R, ^ be power symbol, 2^i represents the i power of 2；R is resistance value, such as 10 ohm, and 100 ohm, or 1 kilohm.
Controller is single-chip microcomputer, DSP or FPGA or CPLD.
The visible light communication switching of the present invention and control method, use the adjustable resistance module of array, can realize few I/O port and realize light modulation progression as much as possible, and simple circuit, it is easy to control.It addition, resistance uses linear increment or progression (index) to be incremented by, according to service condition option and installment, different application demands can be met.And, use light intensity detection circuit detection background luminance, provide foundation for LED light modulation, thus realize more preferable communication efficiency.In sum, the switching of this visible light communication and control method are easy to implement, and the controller resource (I/O port) of needs is less, and motility is good, it is easy to control, advantageously ensure that excellent communication quality.
Accompanying drawing explanation
Fig. 1 is the electric theory diagram of the visible light communication device with electric resistance array of the present invention；
Fig. 2 is the schematic diagram of variable resistance module.
Detailed description of the invention
Below with reference to the drawings and specific embodiments, the present invention is described in further details:
Embodiment 1:
As shown in Figure 1-2, a kind of visible light communication switching and control method, power supply power to LED, the current supply circuit of LED is serially connected with variable resistance module Rx, on-off circuit Q1 and variable resistance wired in parallel；
Send switching signal by controller and adjust the resistance of variable resistance module to regulate the brightness of LED；
Send signal of communication by controller to control the break-make of on-off circuit and realize the on and off of LED, thus realize the transmission of data；
The variable resistance module using array realizes the switching of resistance；
Described variable resistance module is to be switched, by 3*3 resistance and 6, the electric resistance array formed；6 switches are controlled by the switching signal of controller output, and the resistance of any two resistance is different.
Having 3 x wires and 3 vertical lines in electric resistance array, M bar x wire is all connected to common point P, N bar vertical line and is all connected to common point S；P point and 2 end points that S point is variable resistance module；
The M bar x wire of electric resistance array is serially connected with 3 horizontal switches respectively, is Ka, Kb and Kc respectively；N bar vertical line is serially connected with 3 longitudinal switches respectively, is Kx, Ky and Kz respectively；
In 9 resistance, one x wire of termination of any one resistance, another terminates vertical line；3 horizontal switches are controlled by 3 I/O port of controller, and 3 longitudinal switches are controlled by 3 I/O port of controller；Laterally switch is between resistance and P point；Longitudinal switch is between resistance and S point；
Any one laterally switch and arbitrary longitudinal opening and closing conjunction, then have a resistance to connect between P and S point.Horizontal and vertical refer in logic horizontal and vertical, the most actually need laterally or longitudinally to arrange.
The resistance of 9 resistance is respectively R, 2R, 3R ..., 8R and 9R, and R is resistance value, such as 100 ohm, or 1 kilohm.
Or, the resistance of 9 resistance is respectively R, 2R, 4R ..., 128R and 256R, and R is resistance value, such as 10 ohm, 100 ohm, or 1 kilohm.
Controller is also associated with light intensity detection circuit, and wherein, controller is single-chip microcomputer, DSP or FPGA or CPLD.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (6)
1. a visible light communication switching and control method, it is characterised in that powered to LED by power supply, be serially connected with variable resistance module (Rx), on-off circuit (Q1) and variable resistance wired in parallel in the current supply circuit of LED；
Send switching signal by controller and adjust the resistance of variable resistance module to regulate the brightness of LED；
Send signal of communication by controller to control the break-make of on-off circuit and realize the on and off of LED, thus realize the transmission of data；
The variable resistance module using array realizes the switching of resistance；
Described variable resistance module is to be switched, by M*N resistance and M+N, the electric resistance array formed；M and N is the natural number more than 2；M+N switch is controlled by the switching signal of controller output, and the resistance of any two resistance is different.
Visible light communication the most according to claim 1 switching and control method, it is characterised in that having M bar x wire and N bar vertical line in electric resistance array, M bar x wire is all connected to common point P, N bar vertical line and is all connected to common point S；P point and 2 end points that S point is variable resistance module；
The M bar x wire of electric resistance array is serially connected with M laterally switch respectively；N bar vertical line is serially connected with N number of longitudinal switch respectively；
In M*N resistance, one x wire of termination of any one resistance, another terminates vertical line；M laterally switchs M the I/O port being controlled by controller, and N number of longitudinal switch is controlled by N number of I/O port of controller；Laterally switch is between resistance and P point；Longitudinal switch is between resistance and S point；
Any one laterally switch and arbitrary longitudinal opening and closing conjunction, then have a resistance to connect between P and S point.
Visible light communication the most according to claim 2 switching and control method, it is characterised in that M and N is 3, and resistance is 9.
Visible light communication the most according to claim 1 switching and control method, it is characterised in that by the background light intensity that light intensity detection circuit detection is on-the-spot, emphasize the luminosity of whole LED based on bias light.
5. switch and control method according to the visible light communication described in any one of claim 1-4, it is characterised in that the resistance of resistance is linearly incremented by, and the resistance of M*N resistance is respectively R, 2R, 3R ..., (M*N-1) * R and M*N*R, and R is resistance value.
6. switch and control method according to the visible light communication described in any one of claim 1-4, it is characterized in that, the resistance of resistance is exponentially incremented by, the resistance of M*N resistance is respectively R, 2R, 4R ..., 2^(M*N-2) * R and 2^(M*N-1) * R, ^ is power symbol, and 2^i represents the i power of 2；R is resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610472667.0A CN106027145A (en) | 2016-06-27 | 2016-06-27 | Visible light communication switching and controlling method |
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| CN105355173A (en) * | 2015-12-10 | 2016-02-24 | 武汉华星光电技术有限公司 | LED backlight color temperature adjustment circuit and display device therewith |
| CN105606133A (en) * | 2016-01-28 | 2016-05-25 | 东南大学 | Resistive sensor array test circuit based on two-wire system voltage feedback |
| CN105632459A (en) * | 2016-03-28 | 2016-06-01 | 山东超越数控电子有限公司 | Computer display screen brightness adaptive adjustment method |
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| CN1689109A (en) * | 2002-08-19 | 2005-10-26 | 微米技术有限公司 | Dual loop sensing scheme for resistive memory elements |
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Application publication date: 20161012 |