CN109922567A - A kind of light adjusting circuit for realizing a variety of dimming modes - Google Patents
A kind of light adjusting circuit for realizing a variety of dimming modes Download PDFInfo
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- CN109922567A CN109922567A CN201910194609.XA CN201910194609A CN109922567A CN 109922567 A CN109922567 A CN 109922567A CN 201910194609 A CN201910194609 A CN 201910194609A CN 109922567 A CN109922567 A CN 109922567A
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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
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- 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 present invention provides a kind of light adjusting circuits for realizing a variety of dimming modes, including connecting terminal CON1, bleeder circuit, the first branch with comparator device, the second branch with amplifying device and microprocessor U1, the input terminal of connecting terminal CON1 receives the dim signal from controller, generates voltage signal between two output pins；Bleeder circuit feeds back to comparator device and the amplifying device after being divided voltage signal；Voltage division signal is compared to obtain low and high level signal with preset reference voltage using comparator device by the first branch, is dimmed with treating light modulation source according to low and high level signal control late-class circuit；Amplified signal is converted to pwm signal by microprocessor U1, is dimmed with treating light modulation source using pwm signal control late-class circuit by output to microprocessor U1 after second branch amplifies voltage division signal using amplifying device.The present invention program can effectively save the quantity of connecting terminal and circuit components.
Description
Technical field
The present invention relates to lighting technical fields, more particularly to a kind of light adjusting circuit for realizing a variety of dimming modes.
Background technique
Traditional dimming ballast, dimming LED drive circuit, dimming power source etc. using DALI, 0-10V/1-10V,
In the circuit that at least two modes in push dim/touch dim etc. are dimmed, need to set respectively for every kind of dimming mode
An independent connecting terminal and corresponding support circuit are set to realize, this not only will increase the wiring complexity of circuit, can also increase
Add the flexibility and adaptability of light adjusting circuit.A kind of more succinct it can be realized a variety of dimming modes therefore, it is necessary to provide
Light adjusting circuit.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the light adjusting circuit of a variety of dimming modes of realization of problem.
According to the present invention on the one hand, a kind of light adjusting circuit for realizing a variety of dimming modes is provided, which is characterized in that including
Connecting terminal CON1, bleeder circuit, the first branch with comparator device, second with amplifying device and microprocessor U1
Road, wherein
The connecting terminal CON1, has input terminal and output end, and input terminal is used to connect the control of different dimming modes
Device, output end have the first output pin and the second output pin, and the input terminal receives the dim signal from controller,
Voltage signal is generated between two output pins；
The bleeder circuit is connect with the output end of the connecting terminal CON1, is configured to carry out the voltage signal
The comparator device and the amplifying device are fed back to after partial pressure；
The first branch, be configured to using the comparator device by from the bleeder circuit voltage division signal with it is preset
Reference voltage is compared to obtain low and high level signal, to treat light modulation source according to low and high level signal control late-class circuit
It is dimmed；And/or
The second branch is configured to put using the amplifying device to from the voltage division signal of the bleeder circuit
Amplified signal is converted to pwm signal by the microprocessor U1, to utilize institute to the microprocessor U1 by output after big
Pwm signal control late-class circuit is stated to treat light modulation source and dimmed.
Optionally, the bleeder circuit, including connect with first output pin first group of divider resistance, with it is described
Second group of divider resistance, voltage-stabiliser tube D1 and the resistance R60 in parallel with the voltage-stabiliser tube D1 of second output pin connection,
In,
First group of divider resistance and second group of divider resistance series connection, the tie point of the two connect the resistance
One end of R60, the resistance R60 other end ground connection；
The voltage-stabiliser tube D1, plus earth, cathode connect the resistance R60 one end and the integrated transporting discharging U2.
Optionally, the dimming mode controller includes following one of any:
0-10V/1-10V dimming mode controller, push dim/touch dim dimming mode controller, the light modulation side DALI
Formula controller.
Optionally, the comparator device includes comparator, and the amplifying device includes amplifier, the comparator and described
Amplifier all has non-inverting input terminal, reverse input end and output end, wherein the comparator is same mutually defeated with the amplifier
Enter end and be all connected with the bleeder circuit, the reverse input end of the comparator is described to put for inputting the preset reference voltage
The output end of big device connects the microprocessor U1；
The first branch is configured to receive in the connecting terminal CON1 from the push dim/touch dim
The dim signal of dimming mode controller or DALI dimming mode controller, and via the bleeder circuit partial pressure after, using institute
It states comparator to be compared voltage division signal with the preset reference voltage to obtain low and high level signal, and passes through the comparator
Output end output；
The second branch is configured to receive in the connecting terminal CON1 from the light modulation side 0-10V/1-10V
The dim signal of formula controller, and via bleeder circuit partial pressure after, voltage division signal is enlarged into using the amplifier low
Impedance voltage signal and output end through the amplifier is exported to the microprocessor U1.
Optionally, the comparator and the amplifier are integrated in same chip, form integrated transporting discharging U2.
Optionally, the second branch further includes the first photoelectrical coupler O1, has input terminal and output end, and input terminal
It include two pins with output end, in input terminal, a pin connects the microprocessor U1, another pin ground connection；
In its output end, a pin connects power supply, another pin connects the late-class circuit；
The microprocessor U1, has ADC foot and PWM foot, and the ADC foot connects the amplifier out, the PWM
Foot connects a pin of the first photoelectrical coupler O1 input terminal, is configured to the voltage signal for sampling the ADC foot
It is converted to pwm signal and exports through the PWM foot to the late-class circuit.
Optionally, the first branch further includes signal receiving circuit,
The signal receiving circuit includes the second photoelectrical coupler O2, the resistance R14 of resistance R13 and series connection with it, described
Resistance R13 does not connect the output end of the comparator with the one end connecting resistance R14；Wherein, the second photoelectrical coupler O2
With input terminal and output end, and input terminal and output end include two pins, in input terminal, described in a pin connection
The tie point of resistance R13 and resistance R14, another pin are grounded, and in output end, a pin connects the late-class circuit,
Another pin ground terminal；
The signal receiving circuit is configured to control institute according to the low and high level signal that the output end of the comparator exports
The on or off for stating the second photoelectrical coupler O2, is transmitted to the late-class circuit for dim signal.
Optionally, if the voltage signal between two output pins of the connecting terminal CON1 is greater than given voltage value,
Then the voltage division signal of the bleeder circuit is greater than the preset reference voltage, and the output end of the comparator exports high level, institute
The second photoelectrical coupler O2 conducting is stated, the second photoelectrical coupler O2 connects the pin output low level letter of the late-class circuit
Number；
If the voltage signal between two output pins of the connecting terminal CON1 is less than the given voltage value, described
The voltage division signal of bleeder circuit is less than the preset reference voltage, and the output end of the comparator exports low level, and described second
Photoelectrical coupler O2 shutdown, the second photoelectrical coupler O2 connect the pin output high level signal of the late-class circuit.
Optionally, the first branch further includes signal transmission circuit,
The signal transmission circuit includes third photoelectrical coupler O3, the resistance R8 of resistance R4 and series connection with it, switch member
Part Q4, triode Q5, wherein
The third photoelectrical coupler O3 has input terminal and output end, and input terminal and output end include two and draw
Foot, in input terminal, the tie point of pin connection a resistance R4 and resistance R8, the resistance R4 are not connected with one end of resistance R8
The late-class circuit is connected, another pin is grounded, in output end, the base stage of a pin connecting triode Q5, another
Pin connects power supply V1；
The switch element Q4 is separately connected the emitter and the bleeder circuit of the triode Q5；
The signal transmission circuit is configured to receive the feedback signal of the low and high level from the late-class circuit, utilizes
The feedback signal controls the switch element Q4 on or off, to be drawn by controlling described two outputs of connecting terminal CON1
The feedback signal is transferred to the DALI dimming mode controller by the voltage value between foot.
Optionally, the signal transmission circuit further includes the resistance R6, capacitor C3, resistance R11 being sequentially connected in series；
The switch element Q4 includes metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor connects the resistance R6 is not connected with capacitor C3 one
End, grid connect the emitter of the triode Q5, source electrode ground connection.
Optionally, the late-class circuit includes:
In a pin, the signal receiving circuit in single-chip microcontroller, with the output end of the first photoelectrical coupler O1
A pin in the output end of second photoelectrical coupler O2 is separately connected；
The single-chip microcontroller is according to the pwm signal from the first photoelectrical coupler O1 output and/or from described second
The current light-modulating mode of the low and high level signal identification of photoelectrical coupler O2, and according to current light-modulating mode to the source to be dimmed
It is dimmed.
Optionally, if the single-chip microcontroller detects the corresponding voltage of pwm signal from the first photoelectrical coupler O1
Value is in given voltage range within a preset period of time, identifies that current light-modulating mode is 0-10V/1-10V light-modulating mode, in 0-
The source to be dimmed is dimmed according to the pwm signal received under 10V/1-10V light-modulating mode.
Optionally, if to detect that the low and high level signal from the second photoelectrical coupler O2 meets pre- for the single-chip microcontroller
The DALI agreement set identifies that current light-modulating mode is DALI light-modulating mode, according to the height received under DALI light-modulating mode
Low level signal dims the source to be dimmed.
Optionally, if the single-chip microcontroller detects the low and high level signal from the second photoelectrical coupler O2 and meets AC
The wave character of alternating current identifies that current light-modulating mode is push dim/touch dim light-modulating mode, in push dim/
The source to be dimmed is dimmed according to the low and high level signal received under touch dim light-modulating mode.
Optionally, one end that the resistance R4 in the signal transmission circuit is not connected with resistance R8 is connect with the single-chip microcontroller,
It is configured to issue the feedback signal of low and high level；
The signal transmission circuit receives the feedback signal and feeds back to the DALI dimming mode controller.
Optionally, further includes:
Circuit is protected, a switch element Q4 is shared with the signal transmission circuit, further includes voltage-stabiliser tube D3, multiple series connection
Resistance, triode Q6, wherein
The voltage-stabiliser tube D3 has anode and a cathode, and anode connects the base stage of the triode Q6, described in cathode connection
Multiple concatenated resistance, the collector of the triode Q6 connect the grid of the switch element Q4；
If the voltage loaded on the voltage-stabiliser tube D3 is greater than its pressure stabilizing value, the electric current on voltage-stabiliser tube flows through the multiple string
After the base stage of the resistance of connection, voltage-stabiliser tube D3 and triode Q6, the triode Q6 conducting is controlled, and then control the switch element
Q4 is closed, and realizes the overvoltage protection of light adjusting circuit.
In embodiments of the present invention, by the way that the light adjusting controller of different dimming modes is shared a connecting terminal and correspondence
Support circuit (such as bleeder circuit, integrated transporting discharging), and then the dim signal signal that different light adjusting controllers can be issued
All after same connecting terminal and corresponding support circuit perform corresponding processing, rear class is controlled using treated signal
Circuit treats the light modulation in light modulation source to realize, has not only saved the quantity of connecting terminal and circuit components, has also been effectively reduced
The wiring complexity of light adjusting circuit, increases the flexibility and adaptability of light adjusting circuit.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
The structure that Fig. 1 shows a kind of light adjusting circuit for realizing a variety of dimming modes according to an embodiment of the invention is shown
It is intended to.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
In order to solve the above technical problems, the embodiment of the invention provides a kind of light adjusting circuits for realizing a variety of dimming modes.
Fig. 1 shows a kind of structural schematic diagram of light adjusting circuit for realizing a variety of dimming modes according to an embodiment of the invention.Ginseng
See that Fig. 1, light adjusting circuit include connecting terminal CON1, bleeder circuit 11, the first branch with comparator device A1, have amplifier
The second branch of part A2 and microprocessor U1.Wherein, the comparator device A1 in embodiment illustrated in fig. 1 and amplifying device A2 are integrated in
In same chip, formed in integrated transporting discharging U2 shown in FIG. 1, certainly, comparator device A1 and amplifying device A2 can not also collect
At in same chip, it is not limited in the embodiment of the present invention.
Connecting terminal CON1 has input terminal (not shown) and output end, and input terminal is for connecting different dimming modes
Controller (not shown), output end have the first output pin 1 and the second output pin 2, input terminal receive comes automatic control
The dim signal of device processed generates voltage signal between two output pins.
Bleeder circuit 11 is connect with the output end of connecting terminal CON1, can be by two output pins of connecting terminal CON1
Voltage signal divided, and integrated transporting discharging U2 will be fed back to after the voltage division signal after partial pressure.
The first branch can use comparator device A1 for voltage division signal and Pre-set reference electricity from bleeder circuit 11
Pressure is compared to obtain low and high level signal, is dimmed with treating light modulation source according to low and high level signal control late-class circuit.
The second branch, can use amplifying device A2 the voltage division signal from bleeder circuit 11 is amplified it is rear defeated
Out to microprocessor U1, and then amplified signal is converted into pwm signal by microprocessor U1, to control using pwm signal
Late-class circuit (not shown) is treated light modulation source and is dimmed.Wherein, microprocessor U1 can be using being single-chip microcontroller, can also be with
Using other kinds of control IC, the embodiment of the present invention does not do specific restriction to this.
The embodiment of the present invention, by the way that the light adjusting controller of different dimming modes is shared a connecting terminal and corresponding is matched
It covers circuit (such as bleeder circuit 11, integrated transporting discharging U2), and then the dim signal signal that different light adjusting controllers can be issued
All after same connecting terminal and corresponding support circuit perform corresponding processing, rear class is controlled using treated signal
Circuit treats the light modulation in light modulation source to realize, has not only saved the quantity of connecting terminal and circuit components, has also been effectively reduced
The wiring complexity of light adjusting circuit, increases the flexibility and adaptability of light adjusting circuit.
In an embodiment of the present invention, dimming mode controller may include 0-10V/1-10V dimming mode controller,
Push dim/touch dim dimming mode controller, DALI (Digital Addressable Lighting Interface)
Any one in dimming mode controller etc..
0-10V/1-10V dimming mode controller can be tool, and there are two types of a controller of dimming mode, the i.e. controls
Device has 0-10V dimming mode and 1-10V dimming mode, is also possible to two controllers, and each controller is with any
Dimming mode.Either have there are two types of the controller of dimming mode, or the controller with a kind of dimming mode, light modulation is controlled
Principle processed is all identical.
For example, controller has 0-10V dimming mode, when 0V, waits for that light modulation source does not work, when 0V is gradually increased to 10V, to
The brightness in light modulation source gradually brightens, and waits for that light modulation source reaches maximum brightness as 10V.In another example controller has the light modulation side 1-10V
Formula, light source device is most dark when 1V, and when 1V is gradually increased to 10V, the brightness in source to be dimmed gradually brightens, and waits dimming as 10V
Source reaches maximum brightness.
Push dim/touch dim dimming mode controller can actually be a common self- recoverage switch, usually
Short-press is supported to realize that the dimming function for treating light modulation source is realized in the on or off in source to be dimmed, long-pressing.
DALI dimming mode controller is to issue dim signal by DALI agreement, to realize the tune for treating light modulation source tool
Light.
It in an embodiment of the present invention, in bleeder circuit 11 include first connect with the first output pin 1 referring to Fig. 1
Group divider resistance (resistance R30, R31, R32 as shown in figure 1), second group of divider resistance connecting with the second output pin 2 are (as schemed
Resistance R40, R41, R42 in 1), voltage-stabiliser tube D1 and the resistance R60 in parallel with voltage-stabiliser tube D1.
After first group of divider resistance and second group of divider resistance connection, one end of the tie point connection resistance R60 of the two, electricity
Hinder R60 other end ground connection.The plus earth of voltage-stabiliser tube D1, cathode connect one end and the integrated transporting discharging U2 of resistance R60.Voltage-stabiliser tube D1
Late-class circuit is damaged by high pressure when can effectively avoid connecting terminal CON1 connection AC alternating current.In this embodiment, resistance R30,
The sum of resistance value of R31, R32 is equal to the sum of the resistance value of resistance R40, R41, R42, thereby may be ensured that connecting terminal CON1 is being connected
It being capable of trouble free service when AC alternating current.
In an embodiment of the present invention, comparator device A1 includes comparator, and amplifying device A2 includes amplifier, shown in Fig. 1
Comparator and amplifier have been integrated in integrated transporting discharging U2 in embodiment, and comparator and amplifier all have non-inverting input terminal,
Reverse input end and output end.The non-inverting input terminal of comparator is 3 pins, reversed input in integrated transporting discharging U2 as shown in Figure 1
End is 2 pins, output end is 1 pin, and the non-inverting input terminal of amplifier is 5 pins, and reverse input end is 6 pins, output end 7
Pin.
The non-inverting input terminal of comparator and amplifier is all connected with the cathode of the voltage-stabiliser tube D1 in bleeder circuit 11.
For inputting preset reference voltage, the first branch can receive the reverse input end of comparator in connecting terminal CON1
To the dim signal from push dim/touch dim dimming mode controller or DALI dimming mode controller, and via point
After volt circuit 11 divides, voltage division signal is compared using comparator to obtain low and high level signal with preset reference voltage, and
It is exported by the output end of comparator.Herein it should be noted that if what connecting terminal CON1 received is from 0-10V/1-
The dim signal of 10V dimming mode controller, and dim signal via bleeder circuit 11 divide after, voltage division signal also can enter than
It is compared compared with device with preset reference voltage, the voltage signal that only output end of comparator exports at this time will not be to late-class circuit
It impacts, can directly ignore the voltage signal of comparator output.
In an alternative embodiment, light adjusting circuit further includes the resistance R34 of resistance R33 and series connection with it, comparator it is anti-
It is connected at resistance R33 and the tie point of resistance R34 to input terminal.Resistance R33 is not connected with a termination power supply of resistance R34
VDD.Preset reference voltage is set by the resistance R33 and the resistance R34 of series connection with it for choosing respective resistance values.
The output end of amplifier connects microprocessor U1, and second branch can be received in connecting terminal CON1 from 0-
The dim signal of 10V/1-10V dimming mode controller and after being divided via bleeder circuit 11, using amplifier by voltage division signal
It is enlarged into voltage signal in low impedance and the output end through amplifier is exported to microprocessor U1.Herein it should be noted that if connecing
What line terminals CON1 was received is from push dim/touch dim dimming mode controller or DALI dimming mode controller
Dim signal, and dim signal via bleeder circuit 11 divide after, voltage division signal can also be amplified into amplifier, only
The voltage signal that the output end of amplifier exports at this time does not have reference value, and can directly ignore the voltage letter of amplifier output
Number.Because the dim signal that 0-10V/1-10V dimming mode controller issues is lasting voltage signal, microprocessor U1
Voltage signal from amplifier can be converted into pwm signal.And push dim/touch dim dimming mode controller or
The dim signal that DALI dimming mode controller issues is pulse signal, if push dim dimming mode controller is to pass through pressing
Pulse signal is issued when switch, therefore, microprocessor U1 can not continue to generate pwm signal in this case.
In an alternative embodiment, light adjusting circuit further includes the resistance R43 and concatenated resistance R44 of resistance R43, resistance
The R45 and concatenated capacitor C20 of resistance R45.The reverse input end of comparator connects at resistance R33 and the tie point of resistance R34,
Resistance R34 is not connected with one end ground connection of resistance R33, and the output end of amplifier is sequentially connected resistance R45 and capacitor C20, will be low
Impedance voltage signal exports after RC is filtered to microprocessor U1.
In an embodiment of the present invention, also include the first photoelectrical coupler O1 in the second branch of light adjusting circuit, have
Input terminal and output end, and input terminal and output end include two pins, microprocessor U1 has ADC foot and PWM foot.First
In the input terminal of photoelectrical coupler O1, a pin (i.e. 1 pin of the first photoelectrical coupler O1) is through resistance R46 connection micro process
The PWM foot of device U1, another pin (i.e. 2 pins of the first photoelectrical coupler O1) ground connection；In its output end, a pin is (i.e.
4 pins of first photoelectrical coupler O1) connection power supply VCC, another pin (i.e. 3 pins of the first photoelectrical coupler O1)
Connect late-class circuit and resistance R12.
The ADC foot of microprocessor U1 connects amplifier out, and the voltage signal that microprocessor U1 samples ADC foot turns
It is changed to pwm signal and exports through PWM foot to late-class circuit.And then late-class circuit can go back to pwm signal as smooth voltage letter
Number.
In an embodiment of the present invention, the first branch of light adjusting circuit further includes signal receiving circuit 12, and signal receives electricity
Road include the second photoelectrical coupler O2, the resistance R14 of resistance R13 and series connection with it, resistance R15, resistance R13 not with resistance R14
The output end of one end connection comparator of connection.Wherein, the second photoelectrical coupler O2 has input terminal and output end, and input terminal
It include two pins with output end, in input terminal, a pin (i.e. 1 pin of the second photoelectrical coupler O2) connects resistance
The tie point of R13 and resistance R14, another pin (i.e. 2 pins of the second photoelectrical coupler O2) are grounded, in output end, one
A pin (i.e. 4 pins of the second photoelectrical coupler O2) connection late-class circuit and resistance R15, another pin (i.e. second photoelectricity
3 pins of coupler O2) ground terminal.
When dim signal is push dim/touch dim dim signal or DALI dim signal, the output end of comparator
Low and high level signal is exported to signal receiving circuit 12, signal receiving circuit 12 controls the second photoelectricity coupling according to low and high level signal
The on or off of clutch O2, so that dim signal is transmitted to late-class circuit in the form of low and high level.
For example, working as connecting terminal if dim signal is push dim/touch dim dim signal or DALI dim signal
Voltage signal between two output pins of CON1 is greater than given voltage value, then the voltage division signal of bleeder circuit 11 is greater than resistance
Partial pressure on R34, the output end of comparator export high level, and the second photoelectrical coupler O2 is connected, and the 4 of the second photoelectrical coupler O2
Pin exports low level signal, i.e. the end RX exports low level signal.
When the voltage signal between two output pins of connecting terminal CON1 is less than given voltage value, bleeder circuit 11
Voltage division signal be less than the partial pressure in resistance R34, the output end of comparator exports low level, the second photoelectrical coupler O2 shutdown the
4 pins of two photoelectrical coupler O2 export high level signal, i.e. the end RX exports high level signal.Wherein, given voltage value can be with
It is set according to actual needs, such as given voltage value can be 8V.
In an embodiment of the present invention, the first branch of light adjusting circuit can also include signal transmission circuit 13, signal hair
It include third photoelectrical coupler O3, the resistance R8 of resistance R4 and series connection with it, switch element Q4, triode in transmit-receive radio road 13
Q5, zener diode D5, resistance R18.
Third photoelectrical coupler O3 has input terminal and output end, and input terminal and output end include two pins,
In input terminal, the tie point of pin (i.e. 1 pin of third photoelectrical coupler O3) connection a resistance R4 and resistance R8, resistance R4
The other end connects late-class circuit (i.e. the end TX in Fig. 1 connects late-class circuit), another pin be (i.e. third photoelectrical coupler O3's
2 pins) it is grounded, in output end, the base stage of pin (i.e. 3 pins of a third photoelectrical coupler O3) connecting triode Q5,
Another pin (i.e. 4 pins of third photoelectrical coupler O3) connects power supply V1.Switch element Q4, is separately connected triode
The emitter and bleeder circuit 11 of Q5.
After late-class circuit receives dim signal, feedback can also be made to light adjusting controller, such as emitted by signal
Circuit 13 sends feedback signal to light adjusting controller.
For example, it is DALI dim signal that late-class circuit, which receives dim signal, and then signal transmission circuit 13 can also connect
The feedback signal of the low and high level from late-class circuit is received, using feedback signal control switch element Q4 on or off, in turn
Feedback signal is transferred to DALI dimming mode controller by the voltage value between control two output pins of connecting terminal CON1.
When the end TX is high level, third photoelectrical coupler O3 conducting, and control switch element Q4 is connected, connecting terminal
It is low level between two output pins of CON1.When the end TX is low level, third photoelectrical coupler O3 shutdown, and control switch
Element Q4 is turned off, and the level between two output pins of connecting terminal CON1 becomes high level again, so as to complete the transmitting of signal.
In this embodiment, switch element Q4 can use metal-oxide-semiconductor, and signal transmission circuit 13 further includes resistance R6, capacitor
C3, resistance R11, resistance R20, resistance R23, resistance R24, wherein resistance R6, capacitor C3, resistance R11 are sequentially connected in series, resistance R23
In parallel with resistance R24, one end of resistance R23 connects resistance R20, other end ground connection.
The drain electrode connection resistance R6 of metal-oxide-semiconductor is not connected with one end of capacitor C3, the emitter and electricity of grid connecting triode Q5
One end that R11 is not connected with capacitor C3 is hindered, source electrode is grounded through resistance R24.Also, 3 pins of third photoelectrical coupler O3 are through pressure stabilizing
The grid of metal-oxide-semiconductor is connected after two pole D5 and resistance R18.
It in embodiments of the present invention, further include rectification circuit in light adjusting circuit, rectifier bridge DB1 as shown in figure 1, rectifier bridge
The output end of the input terminal connection connecting terminal CON1 of DB1, two pins of the output end of rectifier bridge DB1 are grounded and switch respectively
The drain electrode of element Q4.Rectifier bridge DB1 can be whole to generate voltage signal progress between two output pins of pair of wire connection terminals CON1
Stream.
In an embodiment of the present invention, late-class circuit may include single-chip microcontroller (not shown), single-chip microcontroller and the first light
3 pins of electric coupler O1, the second photoelectrical coupler O2 in signal receiving circuit 12 4 pins be separately connected.Single-chip microcontroller can
With the low and high level letter according to the pwm signal from the first photoelectrical coupler O1 output and/or from the second photoelectrical coupler O2
Number current light-modulating mode of identification, and light modulation source is treated according to current light-modulating mode and is dimmed.
In embodiments of the present invention, light adjusting circuit is to different light adjusting controllers are applied to, such as 0-10V/1-10V dimming mode
Controller, push dim/touch dim dimming mode controller, DALI dimming mode controller, may include 0-10V/1-
10V light-modulating mode, push dim/touch dim light-modulating mode, DALI light-modulating mode.Single-chip microcontroller can be according to the PWM letter received
Number, low and high level signal identify current light-modulating mode, and current operation mode switched to the light-modulating mode identified,
The process of single-chip microcontroller identification light-modulating mode is introduced respectively below.
For 0-10V/1-10V light-modulating mode, if single-chip microcontroller detects the pwm signal pair from the first photoelectrical coupler O1
The voltage value answered is in given voltage range within a preset period of time, then can identify that current light-modulating mode is 0-10V/1-
10V light-modulating mode, and then switch to 0-10V/1-10V light-modulating mode, under 0-10V/1-10V light-modulating mode according to receiving
Pwm signal treat light modulation source and dimmed.The brightness in source to be dimmed can follow connecting terminal CON1 two output pins it
Between voltage signal variation, for example, the voltage value between two output pins of connecting terminal CON1 is bigger, source to be dimmed it is bright
It spends brighter.
It, can also be in monolithic in order to enhance the anti-interference ability of single-chip microcontroller identification light-modulating mode in an alternative embodiment
If the signal or RX for not being received in compliance with DALI agreement in the long period after identifying 0-10V/1-10V light-modulating mode are arranged in machine
Level change does not occur for end, then may further determine that current light-modulating mode is 0-10V/1-10V light-modulating mode.
For DALI light-modulating mode, if single-chip microcontroller detects the low and high level signal from the second photoelectrical coupler O2 and meets
Preset DALI agreement can then identify that current light-modulating mode is DALI light-modulating mode, and then switch to DALI light-modulating mode,
It is dimmed with treating light modulation source according to the low and high level signal received under DALI light-modulating mode.
For push dim/touch dim light-modulating mode, if single-chip microcontroller detects the height from the second photoelectrical coupler O2
Low level signal meets the wave character of AC alternating current, then can identify that current light-modulating mode is push dim/touch dim tune
Optical mode, and then push dim/touch dim light-modulating mode is switched to, under push dim/touch dim light-modulating mode
Light modulation source is treated according to the low and high level signal received to be dimmed.
In addition, single-chip microcontroller can also judge that the low and high level signal from the second photoelectrical coupler O2 meets the wave of AC alternating current
Shape feature duration treats light modulation source and carries out brightness regulation if the duration is greater than preset time period, if this continues
Time is less than preset time period, then root treats light modulation source and carries out switch control.For example, it is assumed that preset duration is 5 seconds, if low and high level
Wave character institute's duration that signal meets AC alternating current is greater than 5 seconds, then can determine the light modulation side push dim/touch dim
Formula controller (such as self- recoverage switch) has been triggered long-pressing movement, and then realizes dimming function, if the duration less than 5 seconds,
It determines push dim/touch dim dimming mode controller (such as self- recoverage switch) short-press that has been triggered movement, and then realizes and open
Close function.
In an embodiment of the present invention, single-chip microcontroller, can also be by the current light modulation mould after switching after switch light modulation mode
Formula is stored in nonvolatile memory, to continue under the light-modulating mode of preservation when powering off and powering on again light adjusting circuit next time
Work.
In an embodiment of the present invention, the power driving circuit connecting with single-chip microcontroller is additionally provided in late-class circuit (in figure
It is not shown), single-chip microcontroller can control the output of power driving circuit using the pwm signal and/or low and high level signal that receive,
And then light modulation source is treated by driving circuit and is dimmed.
In addition, single-chip microcontroller is also connect with the one end for being not connected with resistance R8 the resistance R4 in signal transmission circuit 13, single-chip microcontroller
After the feedback signal for issuing low and high level, feedback signal is fed back into DALI dimming mode controller through signal transmission circuit 13.
With continued reference to Fig. 1, in an embodiment of the present invention, in order to realize the overvoltage protection to light adjusting circuit, light adjusting circuit
In can also include protection circuit, in order to save component, protection circuit and signal transmission circuit 13 share a switch element
Q4 further includes voltage-stabiliser tube D3, multiple concatenated resistance (resistance R2, R5, R7 as shown in figure 1), triode Q6.
Voltage-stabiliser tube D3 has anode and cathode, the base stage of positive connecting triode Q6, and cathode connects resistance R7, triode
The grid of the collector connection switch element Q4 of Q6.If the voltage loaded on voltage-stabiliser tube D3 is greater than its pressure stabilizing value, on voltage-stabiliser tube
Electric current flow through the base stage of multiple concatenated resistance, voltage-stabiliser tube D3 and triode Q6 after, control triode Q6 conducting, and then control
Switch element Q4 is closed, and realizes the overvoltage protection of light adjusting circuit.
In an alternative embodiment, the embodiment of the present invention can also switch element Q4 in the protection circuit grid and ground
Between connect a voltage-stabiliser tube D4, the cathode connection switch element Q4 of voltage-stabiliser tube D4, plus earth.The setting of voltage-stabiliser tube D4 can be with
Avoid the grid voltage of switch element Q4 excessively high, to prevent switch element Q4 to be burned.Further to avoid switch element Q4
Grid voltage it is excessively high, R21 can also be set between 3 pins and ground of third photoelectrical coupler O3, to reduce switch element
Voltage value on the grid of Q4.
In an embodiment of the present invention, can also between metal-oxide-semiconductor Q6 grid and ground terminal series voltage stabilizing pipe D6, the voltage-stabiliser tube
The grid of the anode connection metal-oxide-semiconductor Q6 of D6, cathode ground connection, the setting of voltage-stabiliser tube D6 can effectively prevent the grid of metal-oxide-semiconductor Q6
Overtension prevents metal-oxide-semiconductor Q6 to be damaged.In this embodiment, after the second photoelectrical coupler U2 is turned off, in order to further
Ground avoids overtension on metal-oxide-semiconductor Q6 grid, can also between 3 pins and ground terminal of the second photoelectrical coupler U2 series resistance
R27, to reduce the voltage value on metal-oxide-semiconductor Q6 grid.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: at this
Within the spirit and principle of invention, it is still possible to modify the technical solutions described in the foregoing embodiments or right
Some or all of the technical features are equivalently replaced；And these are modified or replaceed, and do not make corresponding technical solution de-
From protection scope of the present invention.
Claims (16)
1. a kind of light adjusting circuit for realizing a variety of dimming modes, which is characterized in that including connecting terminal CON1, bleeder circuit, tool
There are the first branch of comparator device, the second branch with amplifying device and microprocessor U1, wherein
The connecting terminal CON1 has input terminal and output end, and input terminal is used to connect the controller of different dimming modes, defeated
Outlet has the first output pin and the second output pin, and the input terminal receives the dim signal from controller, at two
Voltage signal is generated between output pin；
The bleeder circuit is connect with the output end of the connecting terminal CON1, is configured to divide the voltage signal
After feed back to the comparator device and the amplifying device；
The first branch is configured to utilize the comparator device by voltage division signal and Pre-set reference from the bleeder circuit
Voltage is compared to obtain low and high level signal, is carried out with treating light modulation source according to low and high level signal control late-class circuit
Light modulation；
The second branch is configured to after being amplified using the amplifying device to the voltage division signal from the bleeder circuit
Amplified signal is converted to pwm signal by the microprocessor U1, described in utilizing to the microprocessor U1 by output
Pwm signal control late-class circuit is treated light modulation source and is dimmed.
2. the light adjusting circuit according to claim 1 for realizing a variety of dimming modes, which is characterized in that
The bleeder circuit, including connect with first output pin first group of divider resistance, with it is described second output draw
Second group of divider resistance, voltage-stabiliser tube D1 and the resistance R60 in parallel with the voltage-stabiliser tube D1 of foot connection, wherein
First group of divider resistance and second group of divider resistance series connection, the tie point of the two connect the resistance R60's
One end, the resistance R60 other end ground connection；
The voltage-stabiliser tube D1, plus earth, cathode connect the resistance R60 one end and the integrated transporting discharging U2.
3. the light adjusting circuit according to claim 1 or 2 for realizing a variety of dimming modes, which is characterized in that the light modulation side
Formula controller includes following one of any:
0-10V/1-10V dimming mode controller, push dim/touch dim dimming mode controller, DALI dimming mode control
Device processed.
4. the light adjusting circuit according to claim 3 for realizing a variety of dimming modes, which is characterized in that the comparator device packet
Comparator is included, the amplifying device includes amplifier, and the comparator and the amplifier all have non-inverting input terminal, reversed defeated
Enter end and output end, wherein the non-inverting input terminal of the comparator and the amplifier is all connected with the bleeder circuit, the ratio
The microprocessor is connected for inputting the preset reference voltage, the output end of the amplifier compared with the reverse input end of device
U1；
The first branch is configured to receive in the connecting terminal CON1 from push dim/touch dim light modulation
The dim signal of mode controller or DALI dimming mode controller, and via the bleeder circuit partial pressure after, using the ratio
Voltage division signal is compared compared with device to obtain low and high level signal with the preset reference voltage, and passes through the defeated of the comparator
Outlet output；
The second branch is configured to receive in the connecting terminal CON1 from the 0-10V/1-10V dimming mode control
The dim signal of device processed, and via the bleeder circuit partial pressure after, voltage division signal is enlarged by Low ESR using the amplifier
Voltage signal and output end through the amplifier is exported to the microprocessor U1.
5. the light adjusting circuit according to claim 4 for realizing a variety of dimming modes, which is characterized in that
The comparator and the amplifier are integrated in same chip, form integrated transporting discharging U2.
6. the light adjusting circuit according to claim 4 for realizing a variety of dimming modes, which is characterized in that
The second branch further includes the first photoelectrical coupler O1, has input terminal and output end, and input terminal and output end are equal
Including two pins, in input terminal, a pin connects the microprocessor U1, another pin ground connection；In its output end,
One pin connects power supply, another pin connects the late-class circuit；
The microprocessor U1 has ADC foot and PWM foot, and the ADC foot connects the amplifier out, and the PWM foot connects
A pin for connecing the first photoelectrical coupler O1 input terminal is configured to the voltage signal for sampling ADC foot conversion
It exports for pwm signal and through the PWM foot to the late-class circuit.
7. the light adjusting circuit according to claim 6 for realizing a variety of dimming modes, which is characterized in that the first branch is also
Including signal receiving circuit,
The signal receiving circuit includes the second photoelectrical coupler O2, the resistance R14 of resistance R13 and series connection with it, the resistance
R13 does not connect the output end of the comparator with the one end connecting resistance R14；Wherein, the second photoelectrical coupler O2 has
Input terminal and output end, and input terminal and output end include two pins, in input terminal, a pin connects the resistance
The tie point of R13 and resistance R14, another pin are grounded, and in output end, a pin connects the late-class circuit, another
A pin ground terminal；
The signal receiving circuit is configured to the low and high level signal control described the exported according to the output end of the comparator
The on or off of two photoelectrical coupler O2, is transmitted to the late-class circuit for dim signal.
8. the light adjusting circuit according to claim 7 for realizing a variety of dimming modes, which is characterized in that
If the voltage signal between two output pins of the connecting terminal CON1 is greater than given voltage value, the partial pressure electricity
The voltage division signal on road is greater than the preset reference voltage, and the output end of the comparator exports high level, the second photoelectricity coupling
Clutch O2 conducting, the second photoelectrical coupler O2 connect the pin output low level signal of the late-class circuit；
If the voltage signal between two output pins of the connecting terminal CON1 is less than the given voltage value, the partial pressure
The voltage division signal of circuit is less than the preset reference voltage, and the output end of the comparator exports low level, second photoelectricity
Coupler O2 shutdown, the second photoelectrical coupler O2 connect the pin output high level signal of the late-class circuit.
9. the light adjusting circuit according to claim 7 for realizing a variety of dimming modes, which is characterized in that the first branch is also
Including signal transmission circuit,
The signal transmission circuit includes third photoelectrical coupler O3, the resistance R8 of resistance R4 and series connection with it, switch element Q4,
Triode Q5, wherein
The third photoelectrical coupler O3 has input terminal and output end, and input terminal and output end include two pins,
In input terminal, the tie point of pin connection a resistance R4 and resistance R8, the resistance R4 are not connected with one end connection of resistance R8
The late-class circuit, another pin are grounded, in output end, the base stage of a pin connecting triode Q5, and another pin
Connect power supply V1；
The switch element Q4 is separately connected the emitter and the bleeder circuit of the triode Q5；
The signal transmission circuit is configured to receive the feedback signal of the low and high level from the late-class circuit, using described
Feedback signal controls the switch element Q4 on or off, by between described two output pins of connecting terminal CON1 of control
Voltage value the feedback signal is transferred to the DALI dimming mode controller.
10. the light adjusting circuit according to claim 9 for realizing a variety of dimming modes, which is characterized in that the signal transmitting
Circuit further includes the resistance R6, capacitor C3, resistance R11 being sequentially connected in series；
The switch element Q4 includes metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor connects one end that the resistance R6 is not connected with capacitor C3,
Grid connects the emitter of the triode Q5, source electrode ground connection.
11. the light adjusting circuit according to claim 9 for realizing a variety of dimming modes, which is characterized in that the late-class circuit
Include:
Second in a pin, the signal receiving circuit in single-chip microcontroller, with the output end of the first photoelectrical coupler O1
A pin in the output end of photoelectrical coupler O2 is separately connected；
The single-chip microcontroller is according to the pwm signal from the first photoelectrical coupler O1 output and/or comes from second photoelectricity
The current light-modulating mode of the low and high level signal identification of coupler O2, and the source to be dimmed is carried out according to current light-modulating mode
Light modulation.
12. the light adjusting circuit according to claim 11 for realizing a variety of dimming modes, which is characterized in that
If the single-chip microcontroller detects the corresponding voltage value of pwm signal from the first photoelectrical coupler O1 in preset time
It is in given voltage range in section, identifies that current light-modulating mode is 0-10V/1-10V light-modulating mode, in 0-10V/1-10V tune
The source to be dimmed is dimmed according to the pwm signal received under optical mode.
13. the light adjusting circuit according to claim 11 for realizing a variety of dimming modes, which is characterized in that
If the single-chip microcontroller detects that the low and high level signal from the second photoelectrical coupler O2 meets preset DALI association
View identifies that current light-modulating mode is DALI light-modulating mode, according to the low and high level signal received under DALI light-modulating mode
The source to be dimmed is dimmed.
14. the light adjusting circuit according to claim 11 for realizing a variety of dimming modes, which is characterized in that
If the single-chip microcontroller detects that the low and high level signal from the second photoelectrical coupler O2 meets the waveform of AC alternating current
Feature identifies that current light-modulating mode is push dim/touch dim light-modulating mode, dims in push dim/touch dim
The source to be dimmed is dimmed according to the low and high level signal received under mode.
15. the light adjusting circuit according to claim 11 for realizing a variety of dimming modes, which is characterized in that
One end that resistance R4 in the signal transmission circuit is not connected with resistance R8 is connect with the single-chip microcontroller, is configured to issue high
Low level feedback signal；
The signal transmission circuit receives the feedback signal and feeds back to the DALI dimming mode controller.
16. the light adjusting circuit according to claim 10 for realizing a variety of dimming modes, which is characterized in that further include:
Circuit is protected, a switch element Q4 is shared with the signal transmission circuit, further includes voltage-stabiliser tube D3, multiple concatenated electricity
Resistance, triode Q6, wherein
The voltage-stabiliser tube D3 has anode and cathode, and anode connects the base stage of the triode Q6, and cathode connection is the multiple
Concatenated resistance, the collector of the triode Q6 connect the grid of the switch element Q4；
If the voltage loaded on the voltage-stabiliser tube D3 is greater than its pressure stabilizing value, the electric current on voltage-stabiliser tube flows through the multiple concatenated
After the base stage of resistance, voltage-stabiliser tube D3 and triode Q6, the triode Q6 conducting is controlled, and then control the switch element Q4 and close
It closes, realizes the overvoltage protection of light adjusting circuit.
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| CN109922567B (en) | 2024-03-22 |
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