CN106304509B - Illuminating circuit and its controller and control method of application - Google Patents
Illuminating circuit and its controller and control method of application Download PDFInfo
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- CN106304509B CN106304509B CN201610898606.0A CN201610898606A CN106304509B CN 106304509 B CN106304509 B CN 106304509B CN 201610898606 A CN201610898606 A CN 201610898606A CN 106304509 B CN106304509 B CN 106304509B
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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
Abstract
The present invention provides a kind of illuminating circuit and its controller and control method of application, wherein, controller is used to dim light emitting module, the light emitting module includes at least one luminescence unit, the controller includes reference voltage adjustment module, the external reference voltage of reference voltage adjustment module and switching signal, to according to the switching signal, the reference voltage is adjusted accordingly, and generates and adjusts reference voltage to export.I.e. the present invention can be adjusted reference voltage according to different switching signals, and then adjust the luminous situation of luminescence unit, promotes the intelligent of product and improves user experience.
Description
Technical field
The present invention relates to light modulation field, more particularly to a kind of illuminating circuit and its controller and control method of application.
Background technology
It is the switch for exporting 2 paths of LEDs of control that the typical case of existing switch toning, which quotes, and electric current is constant, generally comprises three
Kind illuminating state：When for the first time by compressing switch, open first via white light, second by compressing switch when, it is yellow to open the second tunnel
Light, for the third time by compressing switch when, two paths of LED opens simultaneously, colour mixture white light, yellow light.Yellow light can compare white light under similary current status
Slightly dark, so when two paths of LED opens simultaneously, if simply simply opening two paths of LED, human eye compares white light when can substantially realize colour mixture
Or yellow light is bright very much, if client just hopes that simple colour temperature under exchanging will be far from suitable.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of illuminating circuit and its applications
Controller and control method, in the prior art cannot be when multichannel luminescence unit opens simultaneously, to luminescence unit for solution
Luminosity carries out the problem of adaptability adjusting.
In order to achieve the above objects and other related objects, the present invention provides a kind of controller suitable for LED drive power,
For being dimmed to light emitting module, the light emitting module includes at least one luminescence unit, and the controller includes：With reference to electricity
Adjustment module, an external reference voltage and switching signal are pressed, according to the switching signal, phase is carried out to the reference voltage
The adjusting answered, and generate and adjust reference voltage to export.
In a specific embodiment of the invention, the controller may further include：Reference voltage generation module, to
Generate the reference voltage.
In a specific embodiment of the invention, the controller may further include：Mode detection module, for basis
The mode control signal received, generation switching signal corresponding at least one luminescence unit is to export.
In a specific embodiment of the invention, the controller may further include：Electric current drive module, with the hair
Optical module, reference voltage adjustment module and mode detection module electrical connection, to according to the switching signal and institute
It states and adjusts reference voltage respectively to the corresponding driving current of the luminescence unit output accordingly.
In an of the invention specific embodiment, the switching signal include making the ON signal that corresponding luminescence unit is lighted with
And the OFF signal that corresponding luminescence unit is made to extinguish, and when all switching signals are ON signal or the switching signal
In when being at least while ON signal there are two, the reference voltage adjustment module is according to selected voltage shaping modes to institute
Reference voltage is stated to be adjusted.
In a specific embodiment of the invention, the luminescence unit is two, when all switching signals are out letter
Number when or the switching signal in when being at least while ON signal there are two, the reference voltage adjustment module is according to selection
Voltage shaping modes to the reference voltage carry out corresponding proportion zoom in or out, to generate the adjusting reference voltage.
In a specific embodiment of the invention, when being at least while ON signal there are two in the switching signal,
The reference voltage adjustment module selects the electricity according to the number simultaneously for the switching signal of ON signal in the switching signal
Press shaping modes.
In a specific embodiment of the invention, the mode control signal is a mode control module according to the control of reception
It instructs and generates；And the mode control module is according to the multiple control instructions received successively, and respectively with default
Sequential loop exports and the matched mode control signal of current control instruction.
In a specific embodiment of the invention, the scheme control letter of an acquiescence is pre-set in the mode control module
Number, and the time of the control instruction and the time phase difference of last reception control instruction ought be currently received more than a preset time
During threshold value, the mode control module is made to export the mode control signal of the acquiescence.
In a specific embodiment of the invention, the reference voltage adjustment module includes decoding gating unit, is translated with described
The voltage of code gating unit electrical connection chooses unit, the voltage regulation unit being electrically connected with the decoding gating unit, the electricity
Pressure adjustment unit is used to receive the input of the reference voltage, and the reference voltage is adjusted to have multiple voltage size
Voltage output, the decoding gating unit receive the input of the switching signal, and according to the switching signal and the electricity
Pressure chooses the selection signal of unit, selects a kind of defeated as the adjusting reference voltage progress in the multiple voltage output
Go out.
In a specific embodiment of the invention, the voltage, which chooses unit, includes at least one resistance, current source, the electricity
One end ground connection of resistance, the other end connection constant-current source of the resistance, the voltage choose unit by the voltage at the resistance both ends
Signal is chosen to the decoding gating unit with output compared at least one threshold voltage, the resistance is adjustable electric
Resistance.
In a specific embodiment of the invention, the adjustable resistance is built-in or is external in the controller.
In a specific embodiment of the invention, the decoding gating unit includes decoding gate.
In a specific embodiment of the invention, the voltage regulation unit includes operational amplifier (UA5), three pole of field-effect
(N1), resistance string are managed, the resistance string includes at least two resistance, and the resistance series connection in the resistance string, the resistance string
One end ground connection, the other end of the resistance string connects the source electrode of the field effect transistor and the decoding gating unit,
And each resistance in the resistance string is electrically connected the decoding gating unit, the anode input of the operational amplifier (UA5)
End receives the input of the reference voltage, output terminal and the field effect transistor (N1) of the operational amplifier (UA5)
Grid is electrically connected, the drain electrode of the field effect transistor (N1) connection power supply, the source electrode of the field effect transistor (N1) also with
The negative input electricity of the operational amplifier (UA5) and the decoding gating unit connection.
It should be noted that in specific implementation process, the resistance value of each resistance in resistance string identical also can may be used
With difference.
In a specific embodiment of the invention, the voltage, which chooses unit, includes first voltage comparator (UA1), the second electricity
Press comparator (UA2), tertiary voltage comparator (UA3), resistance (R1), resistance (R2) and constant-current source (DC), the resistance
(R1) first end ground connection, the second end of the resistance (R1) is electrically connected the constant-current source (DC) and the first voltage compares
The electrode input end of device (UA1), the voltage of the negative input of the first voltage comparator is first threshold, second ratio
Electrode input end compared with device is electrically connected with the second end of the resistance (R1), and the cathode of the second voltage comparator (UA2) is defeated
Enter the voltage at end for second threshold, the first end of the resistance (R2) is grounded, described in the second end electrical connection of the resistance (R2)
The electrode input end of constant-current source (DC) and the tertiary voltage comparator (UA3), the tertiary voltage comparator (UA3) are born
The voltage of pole input terminal is the 3rd threshold value, and the first comparator (UA1), second voltage comparator (UA2), tertiary voltage compare
Device (UA3) output chooses signal to the decoding gating unit.
In a specific embodiment of the invention, the resistance string includes resistance (RR1), resistance (RR2), resistance (RR3), electricity
(RR4) and resistance (RR5) are hindered, the electrode input end of the operational amplifier (UA5) receives the input of the reference voltage,
The output terminal of the operational amplifier (UA5) is electrically connected with the grid of the field effect transistor (N1), three pole of field-effect
Manage (N1) grounded drain, the source electrode of the field effect transistor (N1) be electrically connected with the first end of the resistance (RR5) and with
The negative input electrical connection of the operational amplifier (UA5), second end and the resistance (RR4) of the resistance (RR5)
First end is electrically connected, and the second end of the resistance (RR4) is electrically connected with the first end of the resistance (RR3), the resistance (RR3)
Second end be electrically connected with the first end of the resistance (RR2), the second end of the resistance (RR2) and the resistance (RR1)
First end is electrically connected, and the second end ground connection of the resistance (RR1), the decoding gate (UA4) receives the switching signal
Input, and the decoding gate (UA4) is compared with the output terminal of the first voltage comparator (UA1), the second voltage
The output terminal of device (UA2), the output terminal of the tertiary voltage comparator (UA3), the first end of the resistance (RR5), the electricity
Hinder the first end of (RR4), the first end of the resistance (RR3), the first end of the resistance (RR2) and the resistance (RR1)
First end electrical connection, and the decoding gate (UA4) described switching signal to reception, the first voltage comparator
(UA1) signal and described the of the output terminal output of the signal, the second voltage comparator (UA2) of output terminal output
The signal of the output terminal output of three voltage comparators (UA3) is compiled, to select the first end of the resistance (RR5), institute
State the first end of resistance (RR4), the first end of the resistance (RR3), the first end of the resistance (RR2) and the resistance
(RR1) voltage of one of first end gives the electric current drive module as the adjusting reference voltage output.
In order to achieve the above objects and other related objects, the present invention also provides a kind of illuminating circuit, including light emitting module, with
And as above any one of them controller, the light emitting module include at least one luminescence unit, the controller can integrate
On chip.
In order to achieve the above objects and other related objects, the present invention also provides a kind of controls suitable for LED drive power
Method, for being dimmed to light emitting module, the light emitting module includes at least one luminescence unit, the described method includes：It connects
Receive the input of reference voltage and switching signal；According to the switching signal, the reference voltage is adjusted accordingly, and it is raw
Into adjusting reference voltage to export.
As described above, the present invention proposes a kind of illuminating circuit and its controller and control method of application, wherein, controller
For being dimmed to light emitting module, the light emitting module includes at least one luminescence unit, and the controller is included with reference to electricity
Press adjustment module, the external reference voltage of reference voltage adjustment module and switching signal, to according to the switching signal, to institute
It states reference voltage to be adjusted accordingly, and generates and adjust reference voltage to export.I.e. the present invention can believe according to different switches
Number, reference voltage is adjusted, and then the luminous situation of luminescence unit is adjusted, it promotes the intelligent of product and improves user's body
It tests.
Description of the drawings
Fig. 1 is shown as the structure diagram of controller of the prior art.
Fig. 2 is shown as the structure diagram of the controller of the present invention in one embodiment.
Fig. 3 is shown as the structure diagram of the reference voltage adjustment module of the present invention in one embodiment.
Fig. 4 is shown as the circuit theory schematic diagram of the reference voltage adjustment module of the present invention in one embodiment.
Fig. 5 is shown as the circuit theory schematic diagram of the mode detection module of the present invention in one embodiment.
Fig. 6 is shown as signal condition schematic diagram in a specific embodiment of the invention.
Fig. 7 is shown as the circuit theory schematic diagram of the electric current drive module of the present invention in one embodiment.
Fig. 8 is shown as part signal waveform diagram in a specific embodiment of the invention.
Fig. 9 is shown as the circuit theory schematic diagram of illuminating circuit in a specific embodiment of the invention.
Figure 10 is shown as the flow diagram of the control method of the present invention in one embodiment.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the case where there is no conflict, following embodiment and implementation
Feature in example can be mutually combined.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in illustrating then
It draws, kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its assembly layout kenel
It is likely more complexity.
Controller of the prior art is usually as shown in Figure 1, the controller 1 includes the benchmark electricity for providing reference voltage
Pressure generation module U1, the mode detection module U3 being detected to light-emitting mode (not shown) and electricity is carried out to light emitting module
The electric current drive module U4 of driving is flowed, in the prior art, generation two-way is opened after mode detection module U3 detection light-emitting modes
OFF signal, and electric current drive module U4 is also respectively according to double switch signal respectively to two lists that shine of external light emitting module
Member is driven, and in concrete application, two-way luminescence unit can be respectively to send the luminescence unit of white light and send yellow light
Luminescence unit, in practical applications, user can select one in two luminescence units to light to reach by model selection
Desired lights effect, can also select to light the two-way luminescence unit simultaneously, when lighting the two-way luminescence unit simultaneously, two
The illumination effect of road luminescence unit is overlapped, human eye when both can substantially realize while light it is brighter than white light or yellow light very
More, brightness saltus step is very big, is likely to result in the discomfort of human eye, and if user just hopes simple colour temperature under exchanging, also not
Desired result can be reached.
Referring to Fig. 2, it is shown as the module diagram of the controller of the present invention in one embodiment.The controller
2 for dimming light emitting module, and the light emitting module includes multiple luminescence units, and the luminescence unit is preferably LED groups
Into the controller 2 includes：
Reference voltage adjustment module U2, an external reference voltage and switching signal, to according to the switching signal, to institute
It states reference voltage to be adjusted accordingly, and generates and adjust reference voltage to export；To according to the mode detection module U3
Output the switching signal, the reference voltage REF is adjusted accordingly, and generate adjusting reference voltage REF_O with
Output.
Further, the controller 2 further includes reference voltage generation module U1 and mode detection in this present embodiment
Module U3, the reference voltage generation module U1 and mode detection module U3 and the reference voltage adjustment module U2 are electrically connected
It connects, the reference voltage generation module U1 is generating reference voltage REF；The mode detection module U3 is used for basis and receives
Mode control signal, generate corresponding with the multiple luminescence unit switching signal to export；I.e. described switching signal
Number it is identical with the number of the luminescence unit, and, each switching signal corresponds to the off and on of control luminescence unit all the way.
And in the present embodiment, illustrated exemplified by with two-way luminescence unit.And have refering to Fig. 2, the mode detection module U3
The input port DET of reception pattern control signal, and corresponding switching signal is exported by port G1 and G2.
Further, in this present embodiment, the controller 2 further includes electric current drive module U4, with the light emitting module
(not shown in Fig. 2), reference voltage adjustment module U2 and mode detection module U3 electrical connections, to according to the mould
The switching signal of formula detection module U3 outputs and the adjusting of reference voltage adjustment module U2 outputs are with reference to electricity
Pressure exports corresponding driving current to the corresponding luminescence unit respectively.In this present embodiment, the electric current drive module U4
By driving current output port IO1 and IO2 to corresponding luminescence unit output driving current.
In this present embodiment, the switching signal includes the ON signal that corresponding luminescence unit is made to light and makes corresponding
The OFF signal that luminescence unit extinguishes, and when all switching signals are ON signal or in the switching signal at least while
When being ON signal there are two, the reference voltage adjustment module U2 is according to selected voltage shaping modes to described with reference to electricity
Pressure is adjusted.In concrete application, the reference voltage adjustment module U2 is according to selected voltage shaping modes to the ginseng
It examines voltage and carries out zooming in or out for corresponding proportion, to generate the adjusting reference voltage REF_O.The selectable voltage tune
Section pattern is, for example, according to the adjusting to adjustable resistance, selects to carry out reference voltage REF the scaling of different proportion.
In another specific embodiment of the present invention, when there are two being at least while ON signal in the switching signal
When, the reference voltage adjustment module is according to the number selection for the switching signal in the switching signal being simultaneously ON signal
Voltage shaping modes.For example, when the switching signal be 5, and two simultaneously for ON signal when, select by it is described adjust refer to
Voltage REF_O is adjusted to 0.75 times of reference voltage REF, when being simultaneously ON signal for three, selects to adjust described with reference to electricity
Pressure REF_O is adjusted to 0.55 times of reference voltage REF.
In a specific embodiment of the invention, the mode control signal is a mode control module according to the control of reception
It instructs and generates；And the mode control module is according to the multiple control instructions received successively, and respectively with default
Sequential loop exports and the matched mode control signal of current control instruction.Such as when the luminescence unit is two-way, and all the way
Luminescence unit emits white light, all the way luminescence unit Yellow light-emitting low temperature, and according to the control instruction received successively, and it is corresponding to light white light respectively
The corresponding luminescence unit of luminescence unit, yellow light and light simultaneously the corresponding luminescence unit of white light and yellow light it is corresponding shine
Unit.
In a specific embodiment of the invention, the scheme control letter of an acquiescence is pre-set in the mode control module
Number, and the time of the control instruction and the time phase difference of last reception control instruction ought be currently received more than a preset time
During threshold value, the mode control module is made to export the mode control signal of the acquiescence.As shown in Fig. 2, switching signal and pattern
The state of the port G1 and G2 of detection module U3 correspond to, and in this present embodiment, the preset time threshold is 10s, described silent
The mode control signal recognized corresponds to the switching signal of acquiescence, and under this default conditions, G1 on, G2 off are opened again after shutdown
And interval time, when being no more than 10s, the state of the corresponding G1 and G2 of second of mode control signal of switching, i.e. G1 is off, and G2 is
On when being opened again after shutdown and interval time is no more than 10s, switches the shape of the third mode control signal corresponding G1 and G2
State, i.e. G1 are on, G2 on, and in the case of opening again after shut down, judge with it is last perform pass, the action started shooting is separated by
When time is more than 10s, the mode control signal of acquiescence is exported, that is, returns to G1 as on, G2 is the state of off.
With reference to Fig. 3, the reference voltage adjustment module U2 includes decoding gating unit U21 and the decoding gating unit
The voltage of U21 electrical connections chooses unit U22, is electrically connected with the decoding gating unit U21 voltage regulation unit U23, it is described
Voltage regulation unit U23 is used to receive the input of the reference voltage REF, and the reference voltage REF is adjusted to more
The voltage output of kind voltage swing, the decoding gating unit U21 receive the input of the switching signal, and according to the switch
Signal and the voltage choose the selection signal of unit U22, select a kind of as the tune in the multiple voltage output
Section reference voltage REF_O is exported.
With further reference to Fig. 4, the circuit structure for being shown as reference voltage adjustment module in a specific embodiment of the invention shows
It is intended to.The voltage, which chooses unit U22, includes at least one resistance, current source, and one end of the resistance is grounded, the resistance
The other end connects constant-current source, and the voltage chooses unit and compares the voltage at the resistance both ends at least one threshold voltage
Signal is chosen to the decoding gating unit compared with output, and the resistance is adjustable resistance.Wherein, the adjustable resistance it is built-in or
It is external in the controller.And in embodiment illustrated in fig. 4, the voltage, which chooses unit U22, includes first voltage comparator
UA1, second voltage comparator UA2, tertiary voltage comparator UA3, resistance R1, resistance R2 and constant-current source DC；The decoding choosing
Logical unit U21, which includes decoding gate UA4, the voltage regulation unit U23, includes operational amplifier UA5, field effect transistor
N1, resistance string, the resistance string includes at least two resistance, and the resistance in the resistance string is connected, and the one of the resistance string
End ground connection, the other end of the resistance string connect the source electrode of the field effect transistor and the decoding gating unit, and institute
The each resistance stated in resistance string is electrically connected the decoding gating unit, specifically, the resistance string is in this present embodiment by electricity
Resistance RR1, resistance RR2, resistance RR3, resistance RR4 and resistance RR5 are composed in series, and the resistance R1 and the resistance R2 are
Adjustable resistance.
In the concrete realization, resistance R1 and R2 can be built-in or be external in chip.
In a specific embodiment of the invention, the first end ground connection of the resistance R1, the second end of the resistance R1 is electrically connected
The electrode input end of the constant-current source DC and the first voltage comparator UA1 are connect, the first voltage comparator UA1's is negative
The voltage of pole input terminal is first threshold, and in this specific embodiment, the first threshold is 1V, and second comparator is just
Pole input terminal is electrically connected with the second end of the resistance R1, and the voltage of the negative input of the second voltage comparator UA2 is
Second threshold, in this specific embodiment, the second threshold is 2V, and the first end of the resistance R2 is grounded, the resistance R2
Second end be electrically connected the electrode input end of the constant-current source DC and tertiary voltage comparator UA3, the tertiary voltage
The voltage of the negative input of comparator UA3 is the 3rd threshold value, and in this specific embodiment, the 3rd threshold value is 1V, described
The electrode input end of operational amplifier UA5 receives the input of the reference voltage, the output terminal of the operational amplifier UA5 and institute
State the grid electrical connection of field effect transistor N1, the grounded drain of the field effect transistor N1, the field effect transistor N1
Source electrode be electrically connected with the first end of the resistance RR5 and be electrically connected with the negative input of the operational amplifier UA5, it is described
The second end of resistance RR5 is electrically connected with the first end of the resistance RR4, and the second end of the resistance RR4 is with the resistance RR3's
First end is electrically connected, and the second end of the resistance RR3 is electrically connected with the first end of the resistance RR2, and the second of the resistance RR2
End is electrically connected with the first end of the resistance RR1, and the second end ground connection of the resistance RR1, the decoding gate UA4 receives institute
State the input of switching signal, and the output terminal of the decoding gate UA4 and first voltage comparator UA1, described second
The output terminal of voltage comparator UA2, the output terminal of the tertiary voltage comparator UA3, the first end, described of the resistance RR5
The first end of resistance RR4, the first end of the resistance RR3, the first of the first end of the resistance RR2 and the resistance RR1
End electrical connection, and outputs of the decoding gate UA4 to the switching signal, the first voltage comparator UA1 of reception
Hold the signal of the output terminal output of the signal, the second voltage comparator UA2 of output and the tertiary voltage comparator
UA3 output terminal output signal be compiled, with select by the first end of the resistance RR5, the resistance RR4 first
One of the first end at end, the first end of the resistance RR3, the first end of the resistance RR2 and the resistance RR1
Voltage gives the electric current drive module as the adjusting reference voltage output.
In this present embodiment, the electric current that the constant-current source provides is ib1, and electric current flows into resistance R1, generates pressure drop VR1, RD1
It is connected to the anode of two comparators UA1, UA2, UA1, the negative termination voltage ref1 and ref2 of UA2 comparators.
V (RD1)=ib1*R1；
When RD1 voltages, less than ref1, then comparator UA1 exports low level, UA2 output low levels；A=B=0；
When RD1 voltages are higher than ref1 and are less than ref2, then comparator UA1 exports high level, UA2 output low levels；A=
1, B=0；
When RD1 voltages, higher than ref2, then comparator UA1 exports high level, UA2 output high level；A=B=1；
Ib2 electric currents flow into resistance R2, generate pressure drop VR2, RD2 and are connected to the anode of comparator UA3, UA3 comparators are born
Termination voltage ref3.
V (RD2)=ib2*R2；
When RD2 voltages, less than ref3, then comparator UA3 exports low level；C=0；
When RD2 voltages, higher than ref3, then comparator UA3 exports high level；C=1；
Thus which can be in by comparing the output identification RD1 of device UA1, UA2, UA3, the external resistive impedance of RD2 pins
A region.
UA5 output driving NMOS feed back to amplifier negative terminal, divider resistance RR1~RR5 are met under NMOS.
Below with ref1=1V, exemplified by ref2=2v, ref3=1v, illustrate the output voltage situation of a, b, c, d, e each point：
A=REF；
B=REF* (RR1+RR2+RR3+RR4)/(RR1+RR2+RR3+RR4+RR5)=0.85*REF；
C=REF* (RR1+RR2+RR3)/(RR1+RR2+RR3+RR4+RR5)=0.75*REF；
D=REF* (RR1+RR2)/(RR1+RR2+RR3+RR4+RR5)=0.65*REF；
E=REF* (RR1)/(RR1+RR2+RR3+RR4+RR5)=0.5*REF；
I.e. in the illustration, provide 50%, 65%, 75%, 85% and 100% this five kinds of voltages and adjust mould
Formula adjusts reference voltage and is adjusted to 50%, 65%, 75%, 85% and the 100% of reference voltage respectively.
In other realization methods, the resistance value of any one resistance in R1, R2 and resistance string can be adjusted, is adjusted with changing
Section reference voltage REF and adjusting reference voltage REF can be adjusted the arbitrary proportion for reference voltage.
Work as G1, when whens G2 differences is high level, REF_O=REF.When G1=G2=high level, the outer connecting resistance R1 of RD1,
Outer connecting resistance R2, the REF_O output voltages of RD2：
| ABC | REF_O |
| 000 | d |
| 001 | a |
| 100 | b |
| 101 | e |
| 110 | c |
| 111 | e |
In this specific embodiment, the structure of the mode detection module U3 is as shown in figure 5, the mode detection module
U3 includes switching signal output unit UB1 and low level detection unit UB2, and switching signal output unit UB1, which has, receives mould
The input port DET of formula control signal, and the output port G1 and G2 with switching signal, the low level detection unit UB2
The low level time of the mode control signal is detected, and when low level time is more than a threshold value, by RST ports to opening
OFF signal output unit UB1 sends reset signal.The mode detection module U3 receives external switch module by DET ports
The mode control signal of transmission makes G1 and G2 export corresponding switching signal, and signal condition is as shown in fig. 6, when DET low levels
When, G1, G2 low levels, after DET inputs the high level pulse of different quantity, G1, G2 are switched in order by above figure.First
Pulse G1 high level, G2 low levels, second pulse G1 low level, G2 high level, the 3rd pulse G1, G2 are all high level,
4th pulse returns to state G1 high level and the low level states of G2, and so on.Low level detection unit UB2 modules are used
It is detected in low level time, is more than 10S when the DET times, exports reset signal RST, reset UB1 modules, even UB1 resets, under
Secondary DET again high level when, start again from the 1st state (in the present embodiment, first state is G1 high level, G2 low levels)
It counts.
It further regards to shown in Fig. 7, it is former to be shown as the circuit of the electric current drive module of the present invention in one embodiment
Manage schematic diagram.The electric current drive module U4 includes comparator UC1, comparator UC2, field effect transistor N2, three pole of field-effect
Pipe N3, resistance R3 and resistance R4, the electrode input end of the comparator UC1 are connected with REF_O, and the comparator UC1's is negative
Pole is electrically connected with the source electrode of the field effect transistor N2, the output terminal of the comparator UC1 and the field effect transistor N2
Grid electrical connection, the source electrode of the field effect transistor N2 is grounded by the resistance R3, the Enable Pin of the comparator UC1
The input of the switching signal G1 is received, the drain electrode of the field effect transistor N2 passes through inductance L1 and first via luminescence unit
Input terminal is electrically connected, and constant current input is provided for first via luminescence unit.The electrode input end of the comparator UC2 connects with REF_O
It connects, the cathode of the comparator UC2 is electrically connected with the source electrode of the field effect transistor N3, the output terminal of the comparator UC2
It being electrically connected with the grid of the field effect transistor N3, the source electrode of the field effect transistor N3 is grounded by the resistance R4,
The Enable Pin of the comparator UC2 receives the input of the switching signal G2, and the drain electrode of the field effect transistor N3 passes through electricity
Sense L2 is electrically connected with the input terminal of the second road luminescence unit, and constant current input is provided for the second road luminescence unit.And IL1 is inductance
The current waveform of L1, A1 are the switch controlling signals of field effect transistor N2, and CS1 is the voltage wave at the ungrounded end of resistance R3
Shape, ILED are the current waveforms of LED in the luminescence unit connected by inductance L1, and in a particular application, IL1, A1, CS1, with
And the waveform of ILED is as shown in figure 8, REF_O DC reference voltage input comparator UC1, UC2 comparator anodes, resistance under CS1
R3 connects feedback resistance, when CS1 voltages less than REF_O be comparator output high level open N1, charge to CS1, the low electricity of IO1
Flat, close to 0V, inductance L1 is electrically charged, and after CS1 voltages reach REF_O, N1, D1 high level, IO1 are closed in comparator UC1 overturnings
Clamper is carried out by D1 to be discharged in voltage HV, inductance L1.IO1 jumps low level after inductive discharge, and N1 is reopened, electricity
Inducing current crest voltage REF_O/CS1 is zero after discharge off, and inductance average current is 0.5* (REF_O/CS1), inductive current
LED light string all is flowed through, the average current of LED light string can be controlled with this, L1 and UC1 form filter circuit and further filter
Flow through the electric current of LED.G1 is switching signal, and high level works, and low level is stopped.
ILED=0.5* (REF_O/CS1)；
The above are the type of drive that first via luminescence unit shines, and by comparing device UC2, resistance R4 and field-effect
What the driving principle of the driving circuit of the second road luminescence unit of triode N3, inductance L2 composition shone with first via luminescence unit
Driving principle and type of drive are similar, not repeated description herein.
Fig. 9 is further regarded to, is shown as the principle schematic of illuminating circuit in a specific embodiment of the invention.It is described to shine
Circuit 3 includes controller 2 as shown in Figure 2 and receives the light emitting module 31 that the controller 2 is dimmed and driven, the control
Device 2 processed can be integrated on chip.In this present embodiment, the light emitting module 31 includes two luminescence units, i.e. luminescence unit
311 and luminescence unit 312, constant-current source DC is further included, luminescence unit 311 includes diode DD1, capacitance C1 and multiple series connection
LED, the cathode of the LED of the anode of diode DD1 with connecting is electrically connected, the cathode of diode DD1 and the anode of the LED to connect
Electrical connection, and capacitance C1 is connected in parallel on the both ends of multiple LED being connected in series, the cathode of multiple LED being connected in series passes through inductance
L1 receives the current drive signal that the electric current drive module U4 is sent, and the anode of the cathode of diode DD1 and constant-current source DC
Electrical connection, the cathode ground connection of constant-current source DC, the circuit structure of luminescence unit 312 is similar with luminescence unit 312, with reference to luminous list
Structure shown by the description of member 311 and attached drawing 9 can be drawn, be not added with repeating herein.
Figure 10 is further regarded to, is shown as the flow diagram of the control method of the present invention in one embodiment.Institute
Control method is stated for being dimmed to light emitting module, the light emitting module includes at least one luminescence unit, the method bag
It includes：
S11：Receive the input of reference voltage and switching signal；
S12：According to the switching signal, the reference voltage is adjusted accordingly, and generates adjusting reference voltage
With output.
The control method is corresponding with the operation principle of the controller 2, the work of the above-mentioned all about controller 2
Make the description of principle, can be applied in the present embodiment.
In conclusion the present invention proposes a kind of illuminating circuit and its controller and control method of application, wherein, controller
For being dimmed to light emitting module, the light emitting module includes at least one luminescence unit, and the controller is included with reference to electricity
Press adjustment module, the external reference voltage of reference voltage adjustment module and switching signal, to according to the switching signal, to institute
It states reference voltage to be adjusted accordingly, and generates and adjust reference voltage to export.I.e. the present invention can believe according to different switches
Number, reference voltage is adjusted, and then the luminous situation of luminescence unit is adjusted, it promotes the intelligent of product and improves user's body
It tests.So the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (16)
1. a kind of controller suitable for LED drive power, which is characterized in that for being dimmed to light emitting module, the hair
Optical module includes at least one luminescence unit, and the controller includes：
Mode detection module, for according to the mode control signal received, generation to be distinguished at least one luminescence unit
Corresponding switching signal is to export；
Reference voltage adjustment module, an external reference voltage and switching signal, to according to the switching signal, to the reference
Voltage is adjusted accordingly, and is generated and adjusted reference voltage to export；
Electric current drive module is electrically connected with the light emitting module, reference voltage adjustment module and the mode detection module,
To export corresponding drive to the corresponding luminescence unit respectively according to the switching signal and the adjusting reference voltage
Streaming current.
2. controller according to claim 1, it is characterised in that：The controller further includes：Reference voltage generation module,
To generate the reference voltage.
3. controller according to claim 1, it is characterised in that：The switching signal includes making corresponding luminescence unit point
Bright ON signal and the OFF signal that corresponding luminescence unit is made to extinguish, and when all switching signals are ON signal or
When being at least while ON signal there are two in the switching signal, the reference voltage adjustment module is according to selected voltage
The reference voltage is adjusted in shaping modes.
4. controller according to claim 1, it is characterised in that：The luminescence unit is two, when all switches
When being at least while ON signal there are two when signal is ON signal or in the switching signal, the reference voltage is adjusted
Module carries out corresponding proportion to the reference voltage according to selected voltage shaping modes and zooms in or out, to generate the tune
Save reference voltage.
5. controller according to claim 4, it is characterised in that：When at least while equal there are two in the switching signal
For ON signal when, the reference voltage adjustment module according in the switching signal simultaneously for ON signal switching signal number
Select the voltage shaping modes.
6. controller according to claim 1, it is characterised in that：The mode control signal is a mode control module root
It is generated according to the control instruction of reception；And the mode control module is according to the multiple control instructions received successively, and
Xun Huan exports and the matched mode control signal of current control instruction in a predetermined sequence respectively.
7. controller according to claim 6, it is characterised in that：An acquiescence is pre-set in the mode control module
Mode control signal, and ought currently receive the time of the control instruction and the last time phase difference for receiving control instruction surpasses
When crossing a preset time threshold, the mode control module is made to export the mode control signal of the acquiescence.
8. controller according to claim 1, it is characterised in that：It is single that the reference voltage adjustment module includes decoding gating
Member, the voltage being electrically connected with the decoding gating unit choose unit, the voltage adjusting being electrically connected with the decoding gating unit
Unit, the voltage regulation unit is used to receive the input of the reference voltage, and the reference voltage is adjusted to more
The voltage output of kind voltage swing, the decoding gating unit receives the input of the switching signal, and is believed according to the switch
Number and the voltage choose the selection signal of unit, select the multiple voltage export in a kind of referred to as described adjust
Voltage is exported.
9. controller according to claim 8, it is characterised in that：The voltage, which chooses unit, includes at least one resistance,
Current source, one end ground connection of the resistance, the other end connection constant-current source of the resistance, the voltage choose unit by the electricity
The voltage for hindering both ends chooses signal to the decoding gating unit, the electricity compared at least one threshold voltage with output
It hinders for adjustable resistance.
10. controller according to claim 9, it is characterised in that：The adjustable resistance is built-in or is external in the control
Device.
11. controller according to claim 8, it is characterised in that：The decoding gating unit includes decoding gate.
12. controller according to claim 9, it is characterised in that：The voltage regulation unit includes operational amplifier
(UA5), field effect transistor (N1), resistance string, the resistance string include at least two resistance, and the resistance in the resistance string
Series connection, one end ground connection of the resistance string, the other end of the resistance string connect source electrode and the institute of the field effect transistor
Decoding gating unit is stated, and each resistance in the resistance string is electrically connected the decoding gating unit, the operational amplifier
(UA5) electrode input end receives the input of the reference voltage, and output terminal and the field of the operational amplifier (UA5) are imitated
The grid of triode (N1) is answered to be electrically connected, the drain electrode connection power supply of the field effect transistor (N1), the field effect transistor
(N1) source electrode is also connected with the negative input of the operational amplifier (UA5) electricity and the decoding gating unit.
13. controller according to claim 12, it is characterised in that：The voltage is chosen unit and is compared including first voltage
Device UA1, second voltage comparator UA2, tertiary voltage comparator UA3, resistance R1, resistance R2 and constant-current source DC, the resistance
The first end ground connection of R1, the second end of the resistance R1 are electrically connected the constant-current source DC and first voltage comparator UA1
Electrode input end, the voltage of the negative input of the first voltage comparator is first threshold, and the second voltage compares
The electrode input end of device is electrically connected with the second end of the resistance R1, the negative input of the second voltage comparator UA2
Voltage is second threshold, the first end of resistance R2 ground connection, the second end of the resistance R2 be electrically connected the constant-current source DC with
And the electrode input end of the tertiary voltage comparator UA3, the voltage of the negative input of the tertiary voltage comparator UA3 are
Letter is chosen in 3rd threshold value, the first voltage comparator UA1, second voltage comparator UA2, tertiary voltage comparator UA3 outputs
Number to the decoding gating unit.
14. controller according to claim 13, it is characterised in that：The resistance string includes resistance RR1, resistance RR2, electricity
The electrode input end for hindering RR3, resistance RR4 and resistance RR5, the operational amplifier UA5 receives the defeated of the reference voltage
Enter, the output terminal of the operational amplifier UA5 is electrically connected with the grid of the field effect transistor N1, the field effect transistor
The grounded drain of N1, the source electrode of the field effect transistor N1 be electrically connected with the first end of the resistance RR5 and with the computing
The negative input electrical connection of amplifier UA5, the second end of the resistance RR5 are electrically connected with the first end of the resistance RR4, institute
The second end for stating resistance RR4 is electrically connected with the first end of the resistance RR3, the second end of the resistance RR3 and the resistance RR2
First end electrical connection, the second end of the resistance RR2 is electrically connected with the first end of the resistance RR1, the of the resistance RR1
Two ends are grounded, and the decoding gate UA4 receives the input of the switching signal, and the decoding gate UA4 and described the
The output terminal of one voltage comparator UA1, the output terminal of the second voltage comparator UA2, the tertiary voltage comparator UA3
Output terminal, the first end of the resistance RR5, the first end of the resistance RR4, the first end of the resistance RR3, the resistance
The first end of RR2 and the electrical connection of the first end of the resistance RR1, and the decoding gate UA4 is to the switch of reception
Signal, the output terminal of the second voltage comparator UA2 that signal, the output terminal of the first voltage comparator UA1 export are defeated
The signal of the output terminal output of the signal and the tertiary voltage comparator UA3 that go out is compiled, to select the resistance
The first end of RR5, the first end of the resistance RR4, the first end of the resistance RR3, the first end of the resistance RR2 and
The voltage of one of the first end of the resistance RR1 gives the electric current drive module as the adjusting reference voltage output.
15. a kind of illuminating circuit, which is characterized in that including light emitting module and as any one of claim 1~14
Controller, the light emitting module include at least one luminescence unit, and the controller can be integrated on chip.
16. a kind of control method suitable for LED drive power, which is characterized in that described for being dimmed to light emitting module
Light emitting module includes at least one luminescence unit, the described method includes：
Receive the input of reference voltage and switching signal；
According to the mode control signal received, generation switching signal corresponding at least one luminescence unit is with defeated
Go out；
According to the switching signal, the reference voltage is adjusted accordingly, and generates and adjusts reference voltage to export；
Corresponding drive is exported to the corresponding luminescence unit according to the switching signal and the adjusting reference voltage respectively
Streaming current.
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| CN107884660B (en) * | 2017-10-17 | 2020-08-11 | 天津航空机电有限公司 | Differential signal acquisition and fault detection circuit for aviation alternating current-direct current power distribution system |
| CN108495419A (en) * | 2018-04-28 | 2018-09-04 | 深圳市晟碟半导体有限公司 | A kind of LED light adjusting circuits, light modulating device and light-dimming method reducing harmonic distortion |
| CN111028790B (en) * | 2019-12-09 | 2021-04-23 | 昆山龙腾光电股份有限公司 | Backlight adjusting circuit, adjusting method and liquid crystal display device |
| CN110896575B (en) * | 2019-12-17 | 2021-08-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
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| CN101039066A (en) * | 2006-02-09 | 2007-09-19 | 精工电子有限公司 | Switching regulator |
| CN203934078U (en) * | 2014-07-01 | 2014-11-05 | 无锡硅动力微电子股份有限公司 | LED sectional dimming circuit |
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| KR101189434B1 (en) * | 2010-12-27 | 2012-10-10 | 엘지이노텍 주식회사 | Power supply apparatus |
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| CN101039066A (en) * | 2006-02-09 | 2007-09-19 | 精工电子有限公司 | Switching regulator |
| CN203934078U (en) * | 2014-07-01 | 2014-11-05 | 无锡硅动力微电子股份有限公司 | LED sectional dimming circuit |
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