CN107071957A - LED light modulating devices and system based on encoded signal - Google Patents
LED light modulating devices and system based on encoded signal Download PDFInfo
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- CN107071957A CN107071957A CN201611237190.4A CN201611237190A CN107071957A CN 107071957 A CN107071957 A CN 107071957A CN 201611237190 A CN201611237190 A CN 201611237190A CN 107071957 A CN107071957 A CN 107071957A
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- 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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- 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]
- H05B45/10—Controlling the intensity of the light
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Abstract
The present invention relates to a kind of LED light modulating devices based on encoded signal and system, wherein the LED light modulating devices based on encoded signal include：AC DC mu balanced circuits, coding input change-over circuit, pwm signal process circuit and controlled light adjusting circuit；The input of AC DC mu balanced circuits is used to access civil power, first output end of AC DC mu balanced circuits connects the first power end of coding input change-over circuit, second output end of AC DC mu balanced circuits connects the second source end of pwm signal process circuit, and the 3rd output end of AC DC mu balanced circuits connects the input of controlled light adjusting circuit；The input of coding input change-over circuit is used to connect coding dispensing device, and the output end of coding input change-over circuit connects the input of pwm signal process circuit；The output end of pwm signal process circuit connects the control end of controlled light adjusting circuit, and the output end of controlled light adjusting circuit is used to connect LED lamp.Above-mentioned LED light modulating devices and system, ensure that the luminous flux of LED lamp, and relatively conventional dimming power source, can reduce volume and cost.
Description
Technical field
The present invention relates to light regulating technology field, more particularly to a kind of LED light modulating devices and use based on encoded signal
The LED light adjusting systems of the LED light modulating devices.
Background technology
As LED is in the development of the every field such as illumination, communication and sensing technology, the visible ray based on LED illumination light source
(visible light communication, the VLC) technology of communicating has due to can be used to illuminate and communicate simultaneously
Wide coverage, energy-saving, health and safety, directed radiation, to lay simple, with low cost, Electro Magnetic Compatibility good etc. prominent
Advantage, indoors positioning field have a good application prospect.At present, the indoor positioning technologies based on LED visible light need many
Individual LED lamp is required for different ID as positioning node, each LED lamp, detects have using optical sensor technology
The LED lamp ID of pwm signal.
The PWM light modulations generally used are usually using the following two kinds mode：
A kind of mode is the output current of control end, now LED driver that pwm signal is directly added to control circuit
Be PWM types, i.e. LED lamp bead can light on and off in high frequency, mean flow rate is adjusted according to different dutycycles.This mode can
For the indoor positioning of VLC technologies, however, because illuminator usually requires certain luminous flux, it is necessary to which LED lamp bead is bright
There is larger electric current, it is therefore desirable to the LED lamp bead of the driver of higher-wattage and larger rated current during state, this will increase
Plus the volume and cost of product.
Another way be by pwm signal by filter circuit be converted into d. c. voltage signal be delivered to control circuit control
End processed.This mode has been filtered into DC voltage control signal due to pwm signal, and the output current of LED driver is direct current
Electric current, therefore be not suitable for the indoor positioning of VLC technologies.
The content of the invention
Based on this, it is necessary to provide a kind of LED light modulating devices based on encoded signal and system, ensure that LED lamp
Luminous flux, and relatively conventional dimming power source can reduce volume and cost.
A kind of LED light modulating devices based on encoded signal, it include AC-DC mu balanced circuits, coding input change-over circuit,
Pwm signal process circuit and controlled light adjusting circuit；
The input of the AC-DC mu balanced circuits is used to access civil power, and the first output end of the AC-DC mu balanced circuits connects
The first power end of the coding input change-over circuit is connect, the second output end of the AC-DC mu balanced circuits connects the PWM letters
The second source end of number process circuit, the 3rd output end of the AC-DC mu balanced circuits connects the defeated of the controlled light adjusting circuit
Enter end；
The input of the coding input change-over circuit is used to connect coding dispensing device, the coding input change-over circuit
Output end connect the input of the pwm signal process circuit；
The output end of the pwm signal process circuit connects the control end of the controlled light adjusting circuit, described by controlled dimming
The output end of circuit is used to connect LED lamp.
In one of the embodiments, the coding input change-over circuit includes coding input sub-circuit, singlechip chip
U5, crystal oscillator Y1, electric capacity C24, electric capacity C25, electric capacity C26 and electric capacity C27；
The input of the coding input sub-circuit be used for connect coding dispensing device, the coding input sub-circuit it is defeated
Go out end connection singlechip chip U5 signal input pin；
Vibration electricity in oscillating circuit input pin and the singlechip chip U5 piece in the piece of the singlechip chip U5
Road output pin connects oscillating circuit input pin in the two ends of the crystal oscillator Y1, the piece of the singlechip chip U5 and also led to respectively
Oscillating circuit output pin in the electric capacity C26 ground connection, the piece of the singlechip chip U5 is crossed also to connect by the electric capacity C27
Ground, the power input pin of the singlechip chip U5 connects the first output end of the AC-DC mu balanced circuits, the single-chip microcomputer
Chip U5 power input pin is additionally operable to be grounded by the electric capacity C24, and the reset pin of the singlechip chip U5 is used for
It is grounded by the electric capacity C25, the first output pin of the singlechip chip U5 connects the of the pwm signal process circuit
One input, the second output pin of the singlechip chip U5 connects the second input of the pwm signal process circuit.
In one of the embodiments, the coding input sub-circuit includes communication connecting seat J3, the communication connecting seat
J3 power pins connect the first output end of the AC-DC mu balanced circuits, two output pins of the communication connecting seat J3
Two signal input pins of the singlechip chip U5 are connected respectively.
In one of the embodiments, the coding input sub-circuit includes wireless communication module J4, button SW1, lighted
Diode (LED) 1 and resistance R46；
The power pins of the wireless communication module J4 connect the first output end of the AC-DC mu balanced circuits, the nothing
Line communication module J4 the first input pin connects the negative electrode of the LED 1, the sun of the LED 1
Pole is by the first output end of the resistance R46 connections AC-DC mu balanced circuits, and the second of the wireless communication module J4 is defeated
Enter one end that pin connects the button SW1, the other end of the button SW1 is used to be grounded, the wireless communication module J4's
Two output pins connect two signal input pins of the singlechip chip U5 respectively.
In one of the embodiments, the pwm signal process circuit includes resistance R32, resistance R33, resistance R34, electricity
Hinder R35, resistance R36, resistance R37, resistance R38, electric capacity C12, electric capacity C12 and metal-oxide-semiconductor Q4；
The grid of the metal-oxide-semiconductor Q4 connects the first output end of the coding input change-over circuit, the grid of the metal-oxide-semiconductor Q4
Pole is also by the second output end of the resistance R37 connections AC-DC mu balanced circuits, and the grid of the metal-oxide-semiconductor Q4 is additionally operable to
Be grounded by the resistance R38, the drain electrode of the metal-oxide-semiconductor Q4 pass sequentially through the resistance R36 of series connection, the resistance R34 and
Second output end of the resistance R32 connections AC-DC mu balanced circuits, the source electrode of the metal-oxide-semiconductor Q4 is used to be grounded；
One end of the resistance R35 connects the connecting node between the resistance R36 and the resistance R34, the resistance
The R35 other end is used to be grounded；
One end of the electric capacity C12 by the second output end of the resistance R33 connections coding input change-over circuit,
One end of the electric capacity C12 is also connected with the connecting node between the resistance R34 and the resistance R32, and the electric capacity C12's is another
One end is used to be grounded；
Connecting node between the resistance R34 and the resistance R36 as the pwm signal process circuit output
End, connects the control end of the controlled light adjusting circuit.
In one of the embodiments, the controlled light adjusting circuit include constant current chip U2, metal-oxide-semiconductor Q5, sampling resistor RS,
Resistance R22, resistance R30, resistance R33, resistance R331, electric capacity C10, electric capacity C11, electric capacity C13, common mode inductance L4, inductance L5, two
Pole pipe D7；
The input pin of the constant current chip U2 connects the 3rd output end of the AC-DC mu balanced circuits, the constant current core
Piece U2 input pin is also connected with the negative electrode of the diode D7, and the power pins of the constant current chip U2 pass through the electric capacity
C11 is grounded, and the controlling switch of the constant current chip U2 connects the output end of the pwm signal process circuit, the constant current chip
U2 current sample pin passes through the 3rd output end of the sampling resistor RS connections AC-DC mu balanced circuits, the constant current
Chip U2 current sample pin is also respectively connected with the electric capacity C13 first ends and the common mode inductance L4 first input end,
The output pin of the constant current chip U2 connects the resistance R31 first ends and the metal-oxide-semiconductor Q5 respectively by the resistance R30
Grid；
The ends of resistance R31 second and the metal-oxide-semiconductor Q5 source electrode are respectively used to ground connection, and the drain electrode of the metal-oxide-semiconductor Q5 is led to
Cross the inductance L5 connects anode, the ends of electric capacity C13 second and the common mode inductance L4 of the diode D7 respectively
Two inputs；
The two ends of the resistance R22 connect the first output end and the common mode inductance L4 of the common mode inductance L4 respectively
Second output end, the electric capacity C10 is in parallel with the resistance R22；
The first output end of the common mode inductance L4 and the second output end of the common mode inductance L4 respectively as it is described by
Two output ends of controlled dimming circuit, for connecting LED lamp.
In one of the embodiments, the AC-DC mu balanced circuits include input filter commutation sub-circuit, transformer electricity
Road, power switch sub-circuit, chip power supply sub-circuit, the first output sub-circuit and the second output sub-circuit, transformer
Circuit includes armature winding, the first secondary windings, second subprime winding and third time level winding；
The input of the input filter commutation sub-circuit is used to access civil power, the input filter commutation sub-circuit it is defeated
Go out end and connect the first end of the armature winding and the 3rd power end of the power switch sub-circuit respectively；
The output end of the power switch sub-circuit connects the second end of the armature winding；
The input of first end connection the first output sub-circuit of first secondary windings, described first it is primary around
Second end of group is used to be grounded, and the first output end of the first output sub-circuit connects the of the coding input change-over circuit
One power end, the second output end of the first output sub-circuit connects the second source end of the pwm signal process circuit；
The first end of the second subprime winding connects the 3rd power end by the chip power supply sub-circuit, described
Second end of the second armature winding is used to be grounded；
The input of first end connection the second output sub-circuit of third time level winding, the third time level around
Second end of group is used to be grounded, and the output end of the second output sub-circuit connects the input of the controlled light adjusting circuit.
In one of the embodiments, the first output sub-circuit includes voltage stabilizing chip U6, diode D6, the pole of voltage stabilizing two
Pipe ZD2, triode Q3, resistance R19, electric capacity EC2, electric capacity C9 in parallel and electric capacity C20 and the electric capacity C21 and electric capacity C22 of parallel connection；
The anode of the diode D6 connects the first end of first secondary windings, and the negative electrode of the diode D6 passes through
The resistance R20 connects the first end of the electric capacity EC2 and the colelctor electrode of the triode Q3, the hair of the triode Q3 respectively
Emitter-base bandgap grading connects the second output pin of the voltage stabilizing chip U6, and the base stage of the triode Q3 passes through the resistance R19 connections institute
State electric capacity EC2 first end, the base stage of the triode Q3 is also connected with described, the anode of the voltage-regulator diode ZD2 and described
Electric capacity EC2 the second end is respectively used to ground connection；
The electric capacity C9 in parallel and electric capacity C20 one end connect the second output pin of the voltage stabilizing chip U6, it is described simultaneously
Electric capacity C9 and electric capacity the C20 other end of connection are used to be grounded；
The electric capacity C21 in parallel and electric capacity C22 one end connect the first output pin of the voltage stabilizing chip U6, it is described simultaneously
Electric capacity C21 and electric capacity the C22 other end of connection are used to be grounded；
The first output pin of the voltage stabilizing chip U6 is the first output end of the described first output sub-circuit；The voltage stabilizing
Chip U6 the second output pin is the second output end of the described first output sub-circuit.
In one of the embodiments, the second output sub-circuit includes diode D5, the resistance R21 and electric capacity of series connection
C4, and electric capacity EC3 and electric capacity EC4 in parallel；
The resistance R21 and electric capacity C4 of the series connection are in parallel with the diode D5, the anode connection institute of the diode D5
The first end of third time level winding is stated, the negative electrode of the diode D5 connects the electric capacity EC3 in parallel and electric capacity EC4 one end,
The electric capacity EC3 in parallel and the electric capacity EC4 other ends are used to be grounded, and the negative electrode of the diode D5 is used as the described second output
The output end of circuit, is also connected with the input of the controlled light adjusting circuit.
A kind of LED light adjusting systems based on encoded signal, its LED for including described in LED lamp and as described above any one is adjusted
Electro-optical device, wherein the LED lamp is connected with the output end of the controlled light adjusting circuit of the LED light modulating devices.
Above-mentioned LED light modulating devices and system, PWM letters are converted to by coding input change-over circuit by external encode signal
Number, LED/light source is dimmed according to pwm signal output current so that LED/light source can be as positioning node, applied to VLC skills
Art.It is defeated so as to be improved by adjusting dutycycle due to external encode signal is converted into the adjustable pwm signal of dutycycle
Go out electric current, to ensure the luminous flux of LED lamp；Due to without setting high-power driver in addition, so that relatively conventional light modulation
Power supply, can reduce volume and cost.Therefore, above-mentioned LED light modulating devices, can have in the case where keeping mutually equal luminous flux
Effect reduces the volume and cost of power supply.
Brief description of the drawings
Fig. 1 is the structural representation of the LED light modulating devices based on encoded signal of one embodiment of the invention；
Fig. 2 a are the circuit diagram of the LED light modulating devices based on encoded signal of one embodiment of the invention；
Fig. 2 b are the circuit diagram of the LED light modulating devices based on encoded signal of another embodiment of the present invention；
Fig. 3 is the structural representation of the LED light modulating devices based on encoded signal of another embodiment of the present invention；
Fig. 4 is the in-line coding signal PWM_code of one embodiment of the invention oscillogram；
Fig. 5 is the PWM dim signals PWM_dim and light modulation reference voltage DIM_ref of one embodiment of the invention oscillogram；
Fig. 6 is the control signal DIM of one embodiment of the invention oscillogram；
Fig. 7 is the constant current chip U2 of one embodiment of the invention output current wave figure；
Fig. 8 is the structural representation of the LED light adjusting systems based on encoded signal of one embodiment of the invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.Many details are elaborated in the following description to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited by following public specific embodiment.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
For example, a kind of LED light modulating devices based on encoded signal, it includes AC (Alternating current, exchange
Electricity)-DC (Direct current, direct current) mu balanced circuit, coding input change-over circuit, PWM (Pulse Width
Modulation, pulse width modulation) signal processing circuit and controlled light adjusting circuit；Wherein, the input of AC-DC mu balanced circuits
For accessing civil power, the first output end of AC-DC mu balanced circuits connects the first power end of coding input change-over circuit, AC-DC
Second output end of mu balanced circuit connects the second source end of pwm signal process circuit, the 3rd output end of AC-DC mu balanced circuits
Connect the input of controlled light adjusting circuit；The input of coding input change-over circuit is used to connect coding dispensing device, encodes defeated
The output end for entering change-over circuit connects the input of pwm signal process circuit；The output end connection of pwm signal process circuit is controlled
The control end of light adjusting circuit, the output end of controlled light adjusting circuit is used to connect LED lamp, for example, two of controlled light adjusting circuit
Output end is respectively used to connect the positive pole and negative pole of LED lamp.
Referring to Fig. 1, its structural representation for the LED light modulating devices 100 based on encoded signal of one embodiment of the invention
Figure.As shown in figure 1, the LED light modulating devices include AC-DC mu balanced circuits 110, coding input change-over circuit 120, pwm signal
Process circuit 130 and controlled light adjusting circuit 140, wherein, the input of AC-DC mu balanced circuits is used to access civil power, AC-DC voltage stabilizings
First output end of circuit connects the first power end of coding input change-over circuit, and the second output end of AC-DC mu balanced circuits connects
The second source end of pwm signal process circuit is connect, the 3rd output end of AC-DC mu balanced circuits connects the input of controlled light adjusting circuit
End；The input of coding input change-over circuit is used to connect coding dispensing device, the output end connection of coding input change-over circuit
The input of pwm signal process circuit；The output end of pwm signal process circuit connects the control end of controlled light adjusting circuit, controlled
The output end of light adjusting circuit is used to connect LED lamp, for example, two output ends of controlled light adjusting circuit are respectively used to connect LED
The positive pole and negative pole of light fixture.
In the present embodiment, AC-DC mu balanced circuits are carried out at rectification, voltage conversion and voltage stabilizing to the electric main of access
Reason, obtains at least three road galvanic current pressure outputs, and at least three road galvanic current pressures are respectively coding input conversion
Circuit, pwm signal process circuit and controlled light adjusting circuit are powered.
Coding input change-over circuit is used to obtain external encode signal, and the decoding of external encode signal is converted into in-line coding
Signal and PWM dim signals, and in-line coding signal and PWM dim signals are exported to pwm signal process circuit.Wherein, compile
Code input change-over circuit is by communicating the outside transmitted by the coding dispensing device outside connecting seat or wireless communication module reception
Encoded signal.For example, outside coding dispensing device is host computer.
As a kind of embodiment, coding input change-over circuit includes singlechip chip, by singlechip chip by outside
Encoded signal decoding is converted to in-line coding signal and PWM dim signals.For example, the PWM dim signals are that dutycycle is adjustable
Pwm signal.
Pwm signal process circuit adjusts the control signal voltage of its output according to in-line coding signal and PWM dim signals
Value, and the control signal is sent to controlled light adjusting circuit, controlled light adjusting circuit is according to the magnitude of voltage of the control signal to LED
Tool is dimmed.For example, controlled dimming circuit adjusts the current value of its output according to the magnitude of voltage of the control signal, with to LED
Tool is dimmed.
Above-mentioned LED light modulating devices, pwm signal is converted to by coding input change-over circuit by external encode signal, according to
Pwm signal output current is dimmed to LED/light source so that LED/light source can be as positioning node, applied to VLC technologies.Due to
External encode signal is converted into the adjustable pwm signal of dutycycle, so as to improve output current by adjusting dutycycle,
To ensure the luminous flux of LED lamp；Due to without setting high-power driver in addition, so that relatively conventional dimming power source, energy
Enough reduce volume and cost.Therefore, above-mentioned LED light modulating devices, can be effectively reduced in the case where keeping mutually equal luminous flux
The volume and cost of power supply.
Also referring to Fig. 2 a and Fig. 2 b, wherein Fig. 2 a are the circuit diagram of the AC-DC mu balanced circuits of an embodiment, and Fig. 2 b are
The circuit diagram of the coding input change-over circuit of one embodiment, pwm signal process circuit and controlled light adjusting circuit.
In one of the embodiments, as shown in Figure 2 b, coding input change-over circuit 120 includes coding input sub-circuit
121st, singlechip chip U5, crystal oscillator Y1, electric capacity C24, electric capacity C25, electric capacity C26 and electric capacity C27；Wherein coding input sub-circuit
Input is used to connect coding dispensing device, and the output end connection singlechip chip U5 of coding input sub-circuit signal input is drawn
Pin；Oscillating circuit output pin is distinguished in oscillating circuit input pin and singlechip chip U5 piece in singlechip chip U5 piece
Connect oscillating circuit input pin in crystal oscillator Y1 two ends, singlechip chip U5 piece to be also grounded by electric capacity C26, monolithic movement
Oscillating circuit output pin is also grounded by electric capacity C27 in piece U5 piece, singlechip chip U5 power input pin connection AC-
First output end of DC mu balanced circuits, singlechip chip U5 power input pin is additionally operable to be grounded by electric capacity C24, single-chip microcomputer
Chip U5 reset pin is used to be grounded by electric capacity C25, singlechip chip U5 the first output pin connection pwm signal processing
The first input end of circuit, singlechip chip U5 the second output pin connects the second input of pwm signal process circuit.
Wherein, electric capacity C26, electric capacity C27 and crystal oscillator Y1 constitute singlechip chip U5 oscillating circuit, and the oscillating circuit is combined
Circuit inside singlechip chip U5 produces the clock frequency needed for singlechip chip U5.Electric capacity C25 and electric capacity C24 are respectively used to
Filtering.
Specifically, external encode Signal coding is converted to in-line coding signal PWM_code and PWM by singlechip chip U5
Dim signal PWM_dim, singlechip chip U5 the first output pin send in-line coding signal PWM_code to pwm signal
The first input end of process circuit, singlechip chip U5 the second output pin sends PWM dim signals PWM_dim to PWM
Second input of signal processing circuit.Wherein, in-line coding signal PWM_code is pressed by the square-wave signal of multiple different cycles
The requirement sequence of setting is obtained.For example, as shown in figure 4, in-line coding signal PWM_code is respectively t0, t1, t2, t3 by the cycle
Obtained etc. the order arrangement of multiple square-wave signals, wherein t0 represents code 0, and t1 represents code 1, and t2 represents code 2, and t3 represents code
3, because the cycle of each code is different, each code may make up an ID according to a kind of permutation and combination of presetting digit capacity
One of them 7 ID that (identification, identity), such as above-mentioned 4 codes are constituted for [0,1,3,1,0,3,
2].Wherein, when presetting digit capacity is that N, code number are M, N N ID of M powers are may make up, such as above-mentioned 4 codes can structure
Into 74 powers totally 2401 ID.
Wherein, external encode signal is acquired from external encode dispensing device.For example, coding input sub-circuit 121 is wrapped
Communication at least one of link block 121a and wireless communication module 121b are included, it is outer to receive host computer etc. by communication connecting seat 121a
The external encode signal of portion's coding dispensing device transmission, or the external encodes such as host computer hair is received by wireless communication module 121b
Send the external encode signal that device is wirelessly sent.
For example, as shown in Figure 2 b, coding input sub-circuit includes communication connecting seat J3, communication connecting seat J3 power pins
The first output end of AC-DC mu balanced circuits is connected, communication connecting seat J3 two output pins connect singlechip chip U5 respectively
Two signal input pins.And for example, communication connecting seat J3 passes through UART (Universal Asynchronous Receiver/
Transmitter, UART Universal Asynchronous Receiver Transmitter) external encode signal is sent to singlechip chip U5 by agreement.And for example, external encode
Signal includes UART_RX signals and UART_TX signals, and singlechip chip U5 includes at least two signal input pins, UART_RX
Signal and UART_TX signals are separately input into two signal input pins different in singlechip chip U5.
And for example, as shown in Figure 2 b, coding input sub-circuit includes wireless communication module J4, button SW1, light emitting diode
LED1 and resistance R46；Wireless communication module J4 power pins 8 connect the first output end of AC-DC mu balanced circuits, wireless telecommunications
The connecting luminous diode LED1 of the first input pin 4 of module J 4 negative electrode, the anode of LED 1 passes through resistance R46
The first output end of AC-DC mu balanced circuits is connected, wireless communication module J4 the second input pin 3 connects button SW1 one end,
The button SW1 other end is used to be grounded, and wireless communication module J4 two output pins 6 and 7 connect singlechip chip U5 respectively
Two signal input pins.When button SW1 is pressed, wireless communication module J4 starts, and receives the coding such as host computer and sends
The external encode signal that device is sent, the external encode signal includes UART_RX signals and UART_TX signals, wireless telecommunications mould
Block J4 sends the UART_ to singlechip chip U5 two signal input pins respectively by output pin 6 and output pin 7
RX signals and UART_TX signals.
Wherein, LED 1 is used for the state for indicating wireless communication module J4, for example, as wireless communication module J4
When in running order, the conducting of LED 1 is luminous.
In one of the embodiments, as shown in Figure 2 b, pwm signal process circuit includes resistance R32, resistance R33, resistance
R34, resistance R35, resistance R36, resistance R37, resistance R38, electric capacity C12, electric capacity C12 and metal-oxide-semiconductor Q4；Wherein metal-oxide-semiconductor Q4 grid
Pole connects the first output end of coding input change-over circuit, metal-oxide-semiconductor as the first input end of the pwm signal process circuit
Q4 grid is also by the second output end of resistance R37 connection AC-DC mu balanced circuits, and metal-oxide-semiconductor Q4 grid is additionally operable to by electricity
R38 ground connection is hindered, metal-oxide-semiconductor Q4 drain electrode passes sequentially through the resistance R36 of series connection, resistance R34 and resistance R32 connection AC-DC voltage stabilizings electricity
Second output end on road, metal-oxide-semiconductor Q4 source electrode is used to be grounded；Between resistance R35 one end connection resistance R36 and resistance R34
Connecting node, the resistance R35 other end is used to be grounded；Electric capacity C12 one end passes through resistance R33 connection coding input change-over circuits
The second output end, electric capacity C12 one end is also connected with the connecting node between resistance R34 and resistance R32, and electric capacity C12's is another
Hold for being grounded；Connecting node between resistance R34 and resistance R36 is connected controlled as the output end of pwm signal process circuit
The control end of light adjusting circuit.
In the present embodiment, the first output end output in-line coding signal PWM_code of coding input change-over circuit, coding
Input the second output end output PWM dim signals PWM_dim of change-over circuit.Wherein, as shown in figure 5, PWM dim signals PWM_
After dim is filtered via the resistance R33 and electric capacity C12 RC filter circuits constituted, light modulation reference voltage is formed at electric capacity C12 two ends
DIM_ref,
The light modulation reference voltage DIM_ref determines the maximum of output current after R34, R35 partial pressure.In-line coding signal
PWM_code is sent to metal-oxide-semiconductor Q4 grid, control metal-oxide-semiconductor Q4 drain-source voltage, when metal-oxide-semiconductor Q4 ends, at pwm signal
The output end voltage for managing circuit is higher, exports high level；When metal-oxide-semiconductor Q4 is turned on, resistance R36 is in parallel with resistance R35, PWM letters
The voltage reduction of the output end (connecting node i.e. between resistance R34, resistance R35, resistance R36 three) of number process circuit, it is defeated
Go out low level.As shown in fig. 6, the control signal DIM of the output end output of pwm signal process circuit is cut between low and high level
Change, control signal DIM is corresponding with in-line coding signal PWM_code cycle and dutycycle.
Wherein, magnitudes of voltage of the control signal DIM in low level is relevant with resistance R36 resistance, by adjusting resistance R36
Resistance, can set magnitude of voltage during control signal DIM low levels, so as to adjust the output current of controlled light adjusting circuit.For example,
By adjusting resistance R36 resistances so that when control signal DIM is low level, the output current of controlled light adjusting circuit can be more than
The 50% of maximum output current, so as to improve the luminous flux of LED/light source.
In one of the embodiments, as shown in Figure 2 b, controlled light adjusting circuit includes constant current chip U2, metal-oxide-semiconductor Q5, sampling
Resistance RS, resistance R22, resistance R30, resistance R33, resistance R331, electric capacity C10, electric capacity C11, electric capacity C13, common mode inductance L4, electricity
Feel L5, diode D7；Wherein constant current chip U2 input pin connects the 3rd output end of AC-DC mu balanced circuits, constant current chip
U2 input pin is also connected with diode D7 negative electrode, and constant current chip U2 power pins are grounded by electric capacity C11, constant current chip
U2 controlling switch connects the output end of pwm signal process circuit as the control end of controlled light adjusting circuit, constant current chip U2's
Current sample pin passes through the 3rd output end of sampling resistor RS connection AC-DC mu balanced circuits, constant current chip U2 current sample
Pin is also respectively connected with electric capacity C13 first ends and common mode inductance L4 first input end, and constant current chip U2 output pin passes through
Resistance R30 connects resistance R31 first ends and metal-oxide-semiconductor Q5 grid respectively；The ends of resistance R31 second and metal-oxide-semiconductor Q5 source electrode difference
For being grounded, metal-oxide-semiconductor Q5 drain electrode connects diode D7 anode, the ends of electric capacity C13 second and common mode electricity respectively by inductance L5
Feel L4 the second input；Resistance R22 two ends connect respectively common mode inductance L4 the first output end and common mode inductance L4
Two output ends, electric capacity C10 is in parallel with resistance R22；Common mode inductance L4 the first output end and common mode inductance L4 the second output end
Respectively as two output ends of controlled light adjusting circuit, for connecting LED lamp.
Constant current chip U2 is according to the correspondingly sized electric current of the voltage output of its controlling switch (DIM pin).That is, constant current chip is worked as
When U2 DIM pin receive the low and high level for the control signal DIM that pwm signal process circuit is exported after code conversion, according to height
Low level magnitude of voltage exports corresponding electric current.For example, when the code sequence of encoded signal is [0,1,3,1,0,3,2], it is permanent
Flow chip U2 and export current waveform as shown in Figure 7.As shown in fig. 6, electric current during low level could be arranged to maximum current
0-70%, so, when low level, is maintained to higher output current, so as to keep mutually equal light
The volume and cost of power supply are effectively reduced in the case of flux.
In one embodiment, as shown in figure 3, AC-DC mu balanced circuits 110 include input filter commutation sub-circuit 111, become
Depressor sub-circuit 112, power switch sub-circuit 113, the output sub-circuit 115 and second of chip power supply sub-circuit 114, first are exported
Sub-circuit 116, wherein transformer sub-circuit include armature winding T1a, the first secondary windings T1b, second subprime winding T1c and the
Three secondary windings T1d；The input of input filter commutation sub-circuit is used to access civil power, the output of input filter commutation sub-circuit
End connects the first end of armature winding and the 3rd power end of power switch sub-circuit respectively；The output end of power switch sub-circuit
Connect the second end of armature winding；The first end connection first of first secondary windings exports the input of sub-circuit, and first is primary
Second end of winding is used to be grounded, and the first output end of the first output sub-circuit connects the first power supply of coding input change-over circuit
End, the second output end of the first output sub-circuit connects the second source end of pwm signal process circuit；The of second subprime winding
One end connects the 3rd power end by chip power supply sub-circuit, and the second end of the second armature winding is used to be grounded；Third time level around
The first end connection second of group exports the input of sub-circuit, and the second end of third time level winding is used to be grounded, the second output
The output end of circuit connects the input of controlled light adjusting circuit.Wherein, the output end of the second output sub-circuit is that the AC-DC is steady
3rd output end of volt circuit.It is appreciated that the first power end, second source end and the 3rd power end are for the ease of differentiation
Title, the first power end of coding input change-over circuit is the power end of coding input change-over circuit, pwm signal process circuit
Second source end be pwm signal process circuit power end, the 3rd power end of power switch sub-circuit is that power supply is opened
The power end of climax circuit.
In the present embodiment, power switch sub-circuit includes power supply chip U1 and switching tube Q1, starts in power supply chip U1
Before, the voltage in the output end of input filter commutation sub-circuit 111 is exported after partial pressure to power supply chip U1 power pins, is
Power supply chip U1 powers with startup power supply chip U1.After power supply chip U1 starts, the first secondary windings T1b, second subprime winding
T1c and third time level winding T1d are respectively induced voltage, the sensing by chip power supply sub-circuit 114 to second subprime winding T1c
Voltage is handled, and is that power supply chip U1 powers.Wherein, the first secondary windings T1b induced voltage is through the first output sub-circuit
After processing, respectively coding input change-over circuit and pwm signal process circuit is powered, second subprime winding T1c induced voltage
It is that power supply chip U1 powers after being handled through chip power supply sub-circuit.
In one of the embodiments, as shown in Figure 2 a, first output sub-circuit include voltage stabilizing chip U6, diode D6,
The electric capacity C21 of voltage-regulator diode ZD2, triode Q3, resistance R19, electric capacity EC2, electric capacity C9 in parallel and electric capacity C20 and parallel connection and
Electric capacity C22；Diode D6 anode connects the first of the first secondary windings as the input of the described first output sub-circuit
End, diode D6 negative electrode connects electric capacity EC2 first end and triode Q3 colelctor electrode, triode by resistance R20 respectively
Q3 emitter stage connection voltage stabilizing chip U6 the second output pin, triode Q3 base stage passes through resistance R19 connection electric capacity EC2's
First end, triode Q3 base stage is also connected with, and voltage-regulator diode ZD2 anode and electric capacity EC2 the second end are respectively used to ground connection；
Electric capacity C9 in parallel and electric capacity C20 one end connection voltage stabilizing chip U6 the second output pin, electric capacity C9 and electric capacity C20 in parallel are another
One end is used to be grounded；Electric capacity C21 in parallel and electric capacity C22 one end connection voltage stabilizing chip U6 the first output pin, electricity in parallel
Holding C21 and the electric capacity C22 other ends is used to be grounded；Voltage stabilizing chip U6 the first output pin is the first defeated of the first output sub-circuit
Go out end；Voltage stabilizing chip U6 the second output pin is the second output end of the first output sub-circuit.For example, the of voltage stabilizing chip U6
One output pin output+3.3V constant pressure, voltage stabilizing chip U6 the second output pin output+12V constant pressure.
In one of the embodiments, the second output sub-circuit includes diode D5, the resistance R21 and electric capacity C4 of series connection,
And electric capacity EC3 and electric capacity EC4 in parallel；The resistance R21 and electric capacity C4 wherein connected is in parallel with diode D5, diode D5's
Anode connects the first end of third time level winding, the electric capacity EC3 of diode D5 negative electrode connection parallel connection and electric capacity EC4 one end, and
Electric capacity EC3 and electric capacity the EC4 other end of connection are used to be grounded, diode D5 negative electrode as the second output sub-circuit output end,
It is also connected with the input of controlled light adjusting circuit.
Wherein, diode D5 is used for rectification.For example, in order to strengthen rectification effect, diode D5 by least two it is positive simultaneously
The diode composition of connection.The resistance R21 and electric capacity C4 of series connection, and electric capacity EC3 in parallel and electric capacity EC4 are used to filter, for example,
In order to strengthen filter effect, electric capacity EC3 and electric capacity EC4 use electrochemical capacitor, wherein electrochemical capacitor EC3 and EC4 positive pole difference
Diode D5 negative electrode is connected, electrochemical capacitor EC3 and EC4 negative pole are respectively used to ground connection.
The invention also discloses a kind of LED light adjusting systems based on encoded signal, as shown in figure 8, the LED light adjusting system bags
LED lamp and the LED light modulating devices as described in above-mentioned any embodiment are included, wherein LED lamp is connected with LED light modulating devices.Example
Such as, LED lamp is connected with the output end of the controlled light adjusting circuit of LED light modulating devices.
The above-mentioned LED light adjusting systems based on encoded signal, due to external encode signal is converted into the adjustable PWM of dutycycle
Signal, so as to improve output current by adjusting dutycycle, to ensure the luminous flux of LED lamp；Due to without in addition
High-power driver is set, so that relatively conventional dimming power source, can reduce volume and cost.Therefore, above-mentioned LED light modulations dress
Put, the volume and cost of power supply can be effectively reduced in the case where keeping mutually equal luminous flux.
It should be noted that can be straight when an element is considered as " connection " another element in above example
Another element is connected in succession or may be simultaneously present intermediary element.On the contrary, when element is referred to as " direct " and another element
During connection, in the absence of intermediary element.
Each technical characteristic of above example can be combined arbitrarily, to make description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield, is all considered to be the scope of this specification record.
Above example only expresses the several embodiments of the present invention, and it describes more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art,
On the premise of not departing from present inventive concept, various modifications and improvements can be made, these belong to protection scope of the present invention.
Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of LED light modulating devices based on encoded signal, it is characterised in that changed including AC-DC mu balanced circuits, coding input
Circuit, pwm signal process circuit and controlled light adjusting circuit；
The input of the AC-DC mu balanced circuits is used to access civil power, the first output end connection institute of the AC-DC mu balanced circuits
The first power end of coding input change-over circuit is stated, the second output end of the AC-DC mu balanced circuits is connected at the pwm signal
The second source end of circuit is managed, the 3rd output end of the AC-DC mu balanced circuits connects the input of the controlled light adjusting circuit；
The input of the coding input change-over circuit be used for connect coding dispensing device, the coding input change-over circuit it is defeated
Go out the input of the end connection pwm signal process circuit；
The output end of the pwm signal process circuit connects the control end of the controlled light adjusting circuit, the controlled light adjusting circuit
Output end be used for connect LED lamp.
2. LED light modulating devices as claimed in claim 1, it is characterised in that it is defeated that the coding input change-over circuit includes coding
Enter sub-circuit, singlechip chip U5, crystal oscillator Y1, electric capacity C24, electric capacity C25, electric capacity C26 and electric capacity C27；
The input of the coding input sub-circuit is used to connect coding dispensing device, the output end of the coding input sub-circuit
Connect the signal input pin of the singlechip chip U5；
Oscillating circuit is defeated in oscillating circuit input pin and the singlechip chip U5 piece in the piece of the singlechip chip U5
Go out oscillating circuit input pin in the two ends that pin connects the crystal oscillator Y1 respectively, the piece of the singlechip chip U5 and also pass through institute
State oscillating circuit output pin in electric capacity C26 ground connection, the piece of the singlechip chip U5 to be also grounded by the electric capacity C27, institute
The power input pin for stating singlechip chip U5 connects the first output end of the AC-DC mu balanced circuits, the singlechip chip
U5 power input pin is additionally operable to be grounded by the electric capacity C24, and the reset pin of the singlechip chip U5 is used to pass through
The electric capacity C25 ground connection, the first of the first output pin connection pwm signal process circuit of the singlechip chip U5 is defeated
Enter end, the second output pin of the singlechip chip U5 connects the second input of the pwm signal process circuit.
3. LED light modulating devices as claimed in claim 2, it is characterised in that the coding input sub-circuit includes communication and connected
Seat J3, the communication connecting seat J3 power pins connect the first output end of the AC-DC mu balanced circuits, the communication connection
Seat J3 two output pins connect two signal input pins of the singlechip chip U5 respectively.
4. LED light modulating devices as claimed in claim 2, it is characterised in that the coding input sub-circuit includes wireless telecommunications
Module J 4, button SW1, LED 1 and resistance R46；
The power pins of the wireless communication module J4 connect the first output end of the AC-DC mu balanced circuits, the channel radio
The first input pin for interrogating module J 4 connects the negative electrode of the LED 1, and the anode of the LED 1 leads to
The first output end of the resistance R46 connections AC-DC mu balanced circuits is crossed, the second input of the wireless communication module J4 is drawn
Pin connects one end of the button SW1, and the other end of the button SW1 is used to be grounded, two of the wireless communication module J4
Output pin connects two signal input pins of the singlechip chip U5 respectively.
5. LED light modulating devices as claimed in claim 1, it is characterised in that the pwm signal process circuit include resistance R32,
Resistance R33, resistance R34, resistance R35, resistance R36, resistance R37, resistance R38, electric capacity C12, electric capacity C12 and metal-oxide-semiconductor Q4；
The grid of the metal-oxide-semiconductor Q4 connects the first output end of the coding input change-over circuit, and the grid of the metal-oxide-semiconductor Q4 is also
By the second output end of the resistance R37 connections AC-DC mu balanced circuits, the grid of the metal-oxide-semiconductor Q4 is additionally operable to pass through
Resistance R38 ground connection, the drain electrode of the metal-oxide-semiconductor Q4 passes sequentially through the resistance R36 of series connection, the resistance R34 and described
Second output end of the resistance R32 connections AC-DC mu balanced circuits, the source electrode of the metal-oxide-semiconductor Q4 is used to be grounded；
One end of the resistance R35 connects the connecting node between the resistance R36 and the resistance R34, the resistance R35's
The other end is used to be grounded；
One end of the electric capacity C12 is described by the second output end of the resistance R33 connections coding input change-over circuit
Electric capacity C12 one end is also connected with the connecting node between the resistance R34 and the resistance R32, the other end of the electric capacity C12
For being grounded；
Connecting node between the resistance R34 and the resistance R36 connects as the output end of the pwm signal process circuit
Connect the control end of the controlled light adjusting circuit.
6. LED light modulating devices as claimed in claim 1, it is characterised in that the controlled light adjusting circuit include constant current chip U2,
Metal-oxide-semiconductor Q5, sampling resistor RS, resistance R22, resistance R30, resistance R33, resistance R331, electric capacity C10, electric capacity C11, electric capacity C13,
Common mode inductance L4, inductance L5, diode D7；
The input pin of the constant current chip U2 connects the 3rd output end of the AC-DC mu balanced circuits, the constant current chip U2
Input pin be also connected with the negative electrode of the diode D7, the power pins of the constant current chip U2 are connect by the electric capacity C11
Ground, the controlling switch of the constant current chip U2 connects the output end of the pwm signal process circuit, the electricity of the constant current chip U2
Stream sampling pin passes through the 3rd output end of the sampling resistor RS connections AC-DC mu balanced circuits, the constant current chip U2
Current sample pin be also respectively connected with the electric capacity C13 first ends and common mode inductance L4 first input end, the perseverance
Stream chip U2 output pin connects the resistance R31 first ends and the metal-oxide-semiconductor Q5 grid by the resistance R30 respectively
Pole；
The ends of resistance R31 second and the metal-oxide-semiconductor Q5 source electrode are respectively used to ground connection, and the drain electrode of the metal-oxide-semiconductor Q5 passes through institute
State inductance L5 connect respectively the diode D7 anode, the ends of electric capacity C13 second and the common mode inductance L4 it is second defeated
Enter end；
The two ends of the resistance R22 connect respectively the common mode inductance L4 the first output end and the common mode inductance L4 second
Output end, the electric capacity C10 is in parallel with the resistance R22；
The first output end of the common mode inductance L4 and the second output end of the common mode inductance L4 are respectively as the controlled tune
Two output ends of optical circuit, for connecting LED lamp.
7. LED light modulating devices as claimed in claim 1, it is characterised in that it is whole that the AC-DC mu balanced circuits include input filter
Flow sub-circuit, transformer sub-circuit, power switch sub-circuit, chip power supply sub-circuit, the first output sub-circuit and the second output
Sub-circuit, the transformer sub-circuit includes armature winding, the first secondary windings, second subprime winding and third time level winding；
The input of the input filter commutation sub-circuit is used to access civil power, the output end of the input filter commutation sub-circuit
The first end of the armature winding and the 3rd power end of the power switch sub-circuit are connected respectively；
The output end of the power switch sub-circuit connects the second end of the armature winding；
The input of first end connection the first output sub-circuit of first secondary windings, first armature winding
Second end is used to be grounded, and the first output end of the first output sub-circuit connects the first electricity of the coding input change-over circuit
Source, the second output end of the first output sub-circuit connects the second source end of the pwm signal process circuit；
The first end of the second subprime winding connects the 3rd power end, described second by the chip power supply sub-circuit
Second end of armature winding is used to be grounded；
The input of first end connection the second output sub-circuit of the third time level winding, the third time level winding
Second end is used to be grounded, and the output end of the second output sub-circuit connects the input of the controlled light adjusting circuit.
8. LED light modulating devices as claimed in claim 7, it is characterised in that the first output sub-circuit includes voltage stabilizing chip
U6, diode D6, voltage-regulator diode ZD2, triode Q3, resistance R19, electric capacity EC2, electric capacity C9 in parallel and electric capacity C20 and simultaneously
The electric capacity C21 and electric capacity C22 of connection；
The anode of the diode D6 connects the first end of first secondary windings, and the negative electrode of the diode D6 passes through described
Resistance R20 connects the first end of the electric capacity EC2 and the colelctor electrode of the triode Q3, the emitter stage of the triode Q3 respectively
The second output pin of the voltage stabilizing chip U6 is connected, the base stage of the triode Q3 passes through the resistance R19 connections electricity
Hold EC2 first end, the base stage of the triode Q3 is also connected with described, the anode and the electric capacity of the voltage-regulator diode ZD2
EC2 the second end is respectively used to ground connection；
The electric capacity C9 in parallel and electric capacity C20 one end connect the second output pin of the voltage stabilizing chip U6, described in parallel
Electric capacity C9 and the electric capacity C20 other ends are used to be grounded；
The electric capacity C21 in parallel and electric capacity C22 one end connect the first output pin of the voltage stabilizing chip U6, described in parallel
Electric capacity C21 and the electric capacity C22 other ends are used to be grounded；
The first output pin of the voltage stabilizing chip U6 is the first output end of the described first output sub-circuit；The voltage stabilizing chip
U6 the second output pin is the second output end of the described first output sub-circuit.
9. LED light modulating devices as claimed in claim 7, it is characterised in that the second output sub-circuit include diode D5,
The resistance R21 and electric capacity C4 of series connection, and electric capacity EC3 and electric capacity EC4 in parallel；
The resistance R21 and electric capacity C4 of the series connection are in parallel with the diode D5, the anode of diode D5 connection described the
The first end of three secondary windings, the negative electrode of the diode D5 connects the electric capacity EC3 in parallel and electric capacity EC4 one end, described
Electric capacity EC3 in parallel and the electric capacity EC4 other ends are used to be grounded, and the negative electrode of the diode D5 is used as the described second output sub-circuit
Output end, be also connected with the input of the controlled light adjusting circuit.
10. a kind of LED light adjusting systems based on encoded signal, it is characterised in that including LED lamp and as in claim 1 to 9
LED light modulating devices described in any one, wherein the LED lamp and the output of the controlled light adjusting circuit of the LED light modulating devices
End connection.
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Effective date of registration: 20181213 Address after: 516000 No. 72 Huifeng 4th Road, Zhongkai High-tech Zone, Huizhou City, Guangdong Province (Factory Building) Applicant after: TCL HUARUI LIGHTING TECHNOLOGY (HUIZHOU) Co.,Ltd. Applicant after: VERY OPTOELECTRONICS (HUIZHOU) Co.,Ltd. Address before: 516006 No. 26, No. 3 Zhongkai Avenue, Huizhou City, Guangdong Province Applicant before: HUIZHOU TCL LIGHT ELECTRICAL APPLIANCE Co.,Ltd. |
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