CN108124350B - A kind of LED power supply system - Google Patents
A kind of LED power supply system Download PDFInfo
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- CN108124350B CN108124350B CN201711407166.5A CN201711407166A CN108124350B CN 108124350 B CN108124350 B CN 108124350B CN 201711407166 A CN201711407166 A CN 201711407166A CN 108124350 B CN108124350 B CN 108124350B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The invention discloses a kind of LED power supply systems, including the first power supply, the first light sensing module, drive module and LED light source module；The output end of first power supply and the input terminal of drive module connect, and the output end of drive module is connect with LED light source module, and the output end of the first light sensing module and the current regulation end of drive module connect；First light sensing module is used to adjust its output signal according to intensity of illumination, and drive module is used for the electric current according to the output voltage of output signal and the first power supply adjustment output to LED light source module, wherein intensity of illumination is positively correlated with electric current.Through the invention, LED light source module brightness when intensity of illumination is larger is higher, form biggish visual contrast, and when intensity of illumination is smaller, the brightness of LED light source module is lower, meets human eye in the visual experience of the environment of dark, it simultaneously can be with power saving, as it can be seen that LED power supply system of the invention is not only energy saving, but also visual experience is more preferable.
Description
Technical field
The present invention relates to electronic technology fields, more particularly to a kind of LED power supply system.
Background technique
LED advertisement is a kind of new model of outdoor advertising publication, it be using light emitting diode composition advertisement printed words or
Person's picture, the electronic large screen advertisement for example seen usually in the street or some highlighted advertisement printed words with glory and
Signboard.LED advertisement has the advantages such as high contrast and reaction speed be fast, therefore is widely used.
Generally, LED advertisement light than it is darker when open LED light source, but the brightness of common LED light source is past
Toward be it is constant, which results in the case where ambient is not too dark, the brightness of LED light source is not strong enough, is difficult to cause to regard
Contrast in feel, with regard to undesirable, and in the case where light is very dark, the brightness of same LED light source is shown the effect of LED advertisement again
Some are dazzling, this brings bad visual experience, while also resulting in the waste of electric energy, it is seen then that current LED power supply system
It can not accomplish the brightness for adjusting LED light source according to the variation of ambient, cause the effect of LED advertisement not fully up to expectations.
Therefore, how a kind of scheme can solve above-mentioned technical problem is provided, is that those skilled in the art needs at present
It solves the problems, such as.
Summary of the invention
The object of the present invention is to provide a kind of LED power supply systems, can change automatically LED light according to the variation of intensity of illumination
The brightness of source module, LED power supply system of the invention is not only energy saving, also brings better visual experience.
In order to solve the above technical problems, the present invention provides a kind of LED power supply system, including the first power supply, the first light
Induction module, drive module and LED light source module；
The output end of first power supply is connect with the input terminal of the drive module, the output end of the drive module with
The LED light source module connection, the output end of the first light sensing module and the current regulation end of the drive module connect
It connects；
The first light sensing module is used to adjust its output signal according to intensity of illumination, and the drive module is used for root
According to the electric current of the output voltage of the output signal and first power supply adjustment output to the LED light source module, wherein institute
Intensity of illumination is stated to be positively correlated with the electric current.
Preferably, the first light sensing module includes second source, first resistor, second resistance, the first photoinduction
Submodule, 3rd resistor, the 4th resistance, first switch tube, the first sampling resistor and the second sampling resistor；
The output end of the second source respectively with the first end of the first resistor and the first switch tube first
End connection, the second end of the first resistor respectively with the first end of the second resistance, the first photoinduction submodule
First end is connected with the control terminal of the first switch tube, the second end of the second resistance, the first photoinduction submodule
Second end and the second end of the 3rd resistor be grounded, the of the second end of the first switch tube and the 4th resistance
One end connection, the second end of the 4th resistance connect with the first end of the 3rd resistor, and common end is respectively with described the
The second end of one sampling resistor is connected with the first end of second sampling resistor, the second termination of second sampling resistor
Ground, output end of the first end of first sampling resistor as the first light sensing module；
For the first photoinduction submodule when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is got over
Greatly, when intensity of illumination is greater than the first preset value, the first switch tube shutdown, the otherwise first switch tube conducting.
Preferably, which further includes switch module, the output of the first end of the switch module and first power supply
End connection, the second end of the switch module are connect with the input terminal of the drive module；The switch module is for controlling institute
The first power supply is stated as drive module power supply.
Preferably, the switch module is controllable switch module；
Then the system further includes the second light sensing module；
The output end of the second light sensing module is connect with the control terminal of the switch module；
The second light sensing module is used to export first control signal when intensity of illumination is greater than the second preset value, with
Switch module shutdown is controlled, second control signal is otherwise exported, to control the switch module closure, wherein described the
Two preset values are greater than first preset value.
Preferably, the second light sensing module includes third power supply, the 5th resistance, the 6th resistance, the second photoinduction
Submodule, the 7th resistance, the 8th resistance, the 9th resistance, second switch and third switching tube；
The output end of the third power supply respectively with the first end of the 5th resistance, the first end of the second switch
It being connected with the first end of the 9th resistance, the second end of the 9th resistance is connect with the first end of the third switching tube,
Output end of its common end as the second light sensing module, the second end of the 5th resistance are electric with the described 6th respectively
The first end of resistance, the first end of the second photoinduction submodule are connected with the control terminal of the second switch, and the described 6th
The second end of resistance, the second end of the second photoinduction submodule, the second end of the 7th resistance and third switch
The second end of pipe is grounded, the second end of the second switch respectively with the first end of the 7th resistance and it is described 8th electricity
The first end of resistance connects, and the second end of the 8th resistance is connect with the control terminal of the third switching tube；
For the second photoinduction submodule when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is got over
Greatly, when intensity of illumination is greater than second preset value, the second switch and the third switching tube are turned off, otherwise institute
It states second switch and the third switching tube is both turned on.
Preferably, the switch module is the Metal Oxide Semiconductor Field Effect Transistor PMOS of P-channel, wherein institute
State control terminal of the grid of PMOS as the switch module, first end of the source electrode of the PMOS as the switch module,
Second end of the drain electrode of the PMOS as the switch module.
Preferably, the first switch tube, the second switch and the third switching tube are NPN type triode；
Then the collector of the NPN type triode is as the first switch tube, the second switch and the third
The first end of switching tube, the base stage of the NPN type triode is as the first switch tube, the second switch and described
The control terminal of three switching tubes, the emitter of the NPN type triode is as the first switch tube, the second switch and institute
State the second end of third switching tube.
Preferably, which further includes solar powered module, and the solar powered module and first power supply connect
It connects, for being first power source charges.
Preferably, which further includes MPPT maximum power point tracking MPPT controller, the solar energy end of the MPPT controller
It is connect with the solar powered module, the electric power storage end of the MPPT controller is connect with the input terminal of first power supply.
Preferably, the drive module includes XL6006 chip；
Then output end of the power switch end of the XL6006 chip as the drive module, the XL6006 chip
Current regulation end of the feedback end as the drive module, the input terminal of the XL6006 chip is as the defeated of the drive module
Enter end.
The present invention provides a kind of LED power supply systems, are supplied to LED light source module driving current by drive module, the
One light sensing module exports different control signals according to illumination variation, and drive module is defeated according to the first light sensing module
The output voltage of signal and the first power supply adjustment out is exported to the electric current of LED light source module, and intensity of illumination and drive module are defeated
It is positively correlated out to the electric current of LED light source module, at intensity of illumination bigger (light is brighter), according to the first light sensing
The output signal of module, is adjusted drive module and is supplied to the electric current of LED light source module and become larger, so that LED light source module exists
Brightness is higher when light is brighter, forms biggish visual contrast, and at intensity of illumination smaller (dark), according to first
The output signal of light sensing module, is adjusted drive module and is supplied to the electric current of LED light source module and become smaller, so that LED light
The brightness of source module is lower, meets human eye in the visual experience of the environment of dark, while can be with power saving, it is seen then that the present invention
LED power supply system it is not only energy saving, but also visual experience is more preferable.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of LED power supply system provided by the present invention；
Fig. 2 is the electrical block diagram of the first light sensing module provided by the present invention；
Fig. 3 is the electrical block diagram of the second light sensing module provided by the present invention；
Fig. 4 is a kind of electrical block diagram of drive module provided by the present invention.
Specific embodiment
Core of the invention is to provide a kind of LED power supply system, can change automatically LED light according to the variation of intensity of illumination
The brightness of source module, LED power supply system of the invention is not only energy saving, also brings better visual experience.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of LED power supply system provided by the present invention, including the first power supply
1, the first light sensing module 2, drive module 3 and LED light source module 4；
The output end of first power supply 1 is connect with the input terminal of drive module 3, the output end and LED light source mould of drive module 3
Block 4 connects, and the output end of the first light sensing module 2 is connect with the current regulation end of drive module 3；
First light sensing module 2 is used to adjust its output signal according to intensity of illumination, and drive module 3 is used for according to output
The adjustment of the output voltage of signal and the first power supply 1 is exported to the electric current of LED light source module 4, wherein intensity of illumination and electric current are in just
It is related.
Specifically, the first power supply 1 is the module that electric energy is exported in LED power supply system, it can export one it is lesser straight
Galvanic electricity, drive module 3 are that LED light source module 4 provides suitable driving current, and the first light sensing module 2 is core of the invention
Core module, since the output of the first light sensing module 2 is to change with ambient light according to Strength Changes, drive module 3 is mentioned
The driving current for supplying LED light source module 4 changes with the variation of the output signal of the first light sensing module 2 again, works as light
When reducing according to intensity, the driving current that drive module 3 is supplied to LED light source module 4 reduces；When intensity of illumination increases, driving
The driving current that module 3 is supplied to LED light source module 4 increases, it is seen then that extraneous intensity of illumination and the electricity for flowing through LED light source module 4
Stream is positively correlated, that is to say, that at light weak (such as night), drive module 3 is supplied to the driving electricity of LED light source module 4
Stream is smaller, and the brightness of LED light source module 4 is lower, and when light strong (such as dusk), drive module 3 is supplied to LED light source module
4 driving current is larger, and the brightness of LED light source module 4 is higher, and therefore, the brightness of LED light source module 4 can be with ambient light
According to intensity variation and change.
It should be noted that intensity of illumination is positively correlated with electric current, positive correlation here only illustrates intensity of illumination and electricity
The variation tendency of stream is consistent, and does not limit intensity of illumination and electric current is in a linear relationship or other functional relations, certainly,
Electric current can be made constantly to change with intensity of illumination, electric current can also be made big in intensity of illumination in such a way that threshold value is set
It is a larger value when set threshold value, is a smaller value when intensity of illumination is not more than set threshold value, both modes is equal
Can, the present invention is it is not limited here.
The present invention provides a kind of LED power supply systems, are supplied to LED light source module driving current by drive module, the
One light sensing module exports different control signals according to illumination variation, and drive module is defeated according to the first light sensing module
The output voltage of signal and the first power supply adjustment out is exported to the electric current of LED light source module, and intensity of illumination and drive module are defeated
It is positively correlated out to the electric current of LED light source module, at intensity of illumination bigger (light is brighter), according to the first light sensing
The output signal of module, is adjusted drive module and is supplied to the electric current of LED light source module and become larger, so that LED light source module exists
Brightness is higher when light is brighter, forms biggish visual contrast, and at intensity of illumination smaller (dark), according to first
The output signal of light sensing module, is adjusted drive module and is supplied to the electric current of LED light source module and become smaller, so that LED light
The brightness of source module is lower, meets human eye in the visual experience of the environment of dark, while can be with power saving, it is seen then that the present invention
LED power supply system it is not only energy saving, but also visual experience is more preferable.
On the basis of the above embodiments:
Embodiment as one preferred, the first light sensing module 2 include second source V2, first resistor R1, second
Resistance R2, the first photoinduction submodule 21,3rd resistor R3, the 4th resistance R4, first switch tube S1, the first sampling resistor RS1
With the second sampling resistor RS2；
The output end of second source V2 is connect with the first end of the first end of first resistor R1 and first switch tube S1 respectively,
The second end of first resistor R1 is opened with the first end of second resistance R2, the first end of the first photoinduction submodule 21 and first respectively
Close the control terminal connection of pipe S1, the second end of second resistance R2, the second end of the first photoinduction submodule 21 and 3rd resistor R3
Second end be grounded, the second end of first switch tube S1 is connect with the first end of the 4th resistance R4, the second of the 4th resistance R4
End is connect with the first end of 3rd resistor R3, and common end is electric with the second end of the first sampling resistor RS1 and the second sampling respectively
The first end connection of RS2 is hindered, the second end ground connection of the second sampling resistor RS2, the first end of the first sampling resistor RS1 is as first
The output end of light sensing module 2；
For first photoinduction submodule 21 when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is bigger,
When intensity of illumination is greater than the first preset value, first switch tube S1 shutdown, otherwise first switch tube S1 is connected.
Specifically, Fig. 2 is referred to, Fig. 2 is the electrical block diagram of the first light sensing module provided by the present invention,
The resistance value of first photoinduction submodule 21 changes with the variation of intensity of illumination, and when intensity of illumination is stronger, resistance value is smaller, illumination
When intensity is weaker, resistance value is bigger.When intensity of illumination dies down, the resistance value of the first photoinduction submodule 21 becomes larger, then the first light sensation
The voltage at 21 both ends of submodule is answered to become larger, the voltage at the both ends first switch tube S1 also becomes larger, when intensity of illumination is default less than first
When value, the voltage at the both ends first switch tube S1 can be such that first switch tube S1 is connected, at this time the first end of the first sampling resistor RS1
High level is exported, the voltage at the current regulation end of drive module 3 increases, and drive module 3 is supplied to the driving of LED light source module 4
Electric current reduces, and the brightness of LED light source module 4 reduces, similarly, when intensity of illumination is greater than the first preset value, first switch tube S1
The undertension at both ends is so that first switch tube S1 is connected, and first switch tube S1 is turned off, at this time the first of the first sampling resistor RS1
End output low level (approach 0), the voltage at the current regulation end of drive module 3 reduce, and drive module 3 is supplied to LED light source mould
The driving current of block 4 increases, and the brightness of LED light source module 4 increases, for example, it is assumed that first opens when the intensity of illumination at dusk is a
It closes pipe S1 to be not turned on, the brightness of LED light source module 4 is higher at this time, (light is darker) is gradually reduced with intensity of illumination, in light
According to intensity be b when, first switch tube S1 conducting, the brightness of LED light source module 4 is lower, generally, power supply system of the invention
The brightness that the LED light source module 4 when light is not dark may be implemented is high, and the brightness of LED light source module 4 is low when dark, this is more accorded with
The visual experience for closing human eye, also makes LED advertising results more preferable.
The partial pressure it is envisioned that first resistor R1 connects with second resistance R2, when the resistance value of first resistor R1 is adjustable
When, thus it is possible to vary first switch tube S1 corresponding intensity of illumination when being connected, for example, the first switch tube S1 when intensity of illumination is 10
It can be connected, certainly, be may be implemented when intensity of illumination is 15 or other numerical value first completely by adjusting first resistor R1
Switching tube S1 conducting can be convenient user according to the actual situation to adjust first when first resistor R1 is resistance value adjustable resistor
Switching tube S1 corresponding intensity of illumination when being connected, to keep LED advertising results more preferable.First resistor R1 can be adjustable for resistance value
Resistance, or other, the present invention is it is not limited here.In addition, the first photoinduction submodule 21 can be photo resistance,
It can be other, the present invention is it is not limited here.
It should be noted that above content is a kind of realization side of the first light sensing module 2 provided in this embodiment
Formula, certainly there are also other implementations, the present invention is not particularly limited herein, in addition, it is noted herein that, first
Light sensing module 2 needs as far as possible far from LED light source module 4, to guarantee the accuracy incuded to outdoor intensity of illumination.
Embodiment as one preferred, the system further include switch module, the first end of switch module and the first power supply 1
Output end connection, the second end of switch module connect with the input terminal of drive module 3；Switch module is for controlling the first power supply
1 powers for drive module 3.
Specifically, it is contemplated that LED power supply system be not in practical applications always to LED light source module 4 power, such as
LED light source module 4 is only opened at dusk and at night, and daytime without opening, increases switch module, switch module in the present embodiment
May be implemented whether the first power supply 1 is that drive module 3 is powered, when switch module is connected, the first power supply 1 is the power supply of drive module 3,
When switch module is not turned on, the first power supply 1 is disconnected with drive module 3, cannot achieve the transmitting of electric energy, LED light source module 4 is not opened
It opens.Switch module make LED power supply system using more flexible, LED light source module 4 can be opened according to the actual situation, extensively
It is more preferable to accuse effect.
Embodiment as one preferred, switch module are controllable switch module；
Then the system further includes the second light sensing module 5；
The output end of second light sensing module 5 and the control terminal of switch module connect；
Second light sensing module 5 is used to export first control signal when intensity of illumination is greater than the second preset value, with control
Switch module processed shutdown, otherwise exports second control signal, with control switch module closure, wherein the second preset value is greater than the
One preset value.
Specifically, whether it is closed in this example using 5 control switch module of the second light sensing module, it is assumed that second is default
Value is 40, when intensity of illumination is less than 40, the second light sensing module 5 output high level (second control signal i.e. herein,
Can low level triggering), trigger switch module closure, the first power supply 1 is connected with drive module 3 at this time, and for drive module 3 confession
Electricity, since the second preset value is greater than the first preset value, the voltage at the both ends first switch tube S1 in the first light sensing module 2 is not
It is enough that first switch tube S1 is connected, the first end of the first sampling resistor RS1 exports low level at this time, and drive module 3 is supplied to
The driving current of LED light source module 4 is larger, and LED light source module 4 is brighter, and with the reduction of intensity of illumination, first switch tube S1 is led
Logical, the first light sensing module 2 exports high level, and the electric current for flowing through LED light source module 4 reduces, 4 brightness of LED light source module drop
It is low.
It should be noted that the first preset value and the second preset value are artificially set, user can be according to practical feelings
Condition is adjusted, and the present invention is it is not limited here.
By incuding extraneous intensity of illumination, the second light sensing module 5 can automatically turn on LED light source module 4, avoid
Manually control the cumbersome of LED light source module 4, it is seen then that LED power supply system of the invention is more intelligent, more convenient, improves user's body
It tests.
Embodiment as one preferred, the second light sensing module 5 include third power supply V3, the 5th resistance R5, the 6th
Resistance R6, the second photoinduction submodule 51, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, second switch S2 and third
Switching tube S3；
The output end of third power supply V3 respectively with the first end of the 5th resistance R5, the first end and the 9th of second switch S2
The first end of resistance R9 connects, and the second end of the 9th resistance R9 is connect with the first end of third switching tube S3, common end conduct
The output end of second light sensing module 5, the second end of the 5th resistance R5 respectively with the first end of the 6th resistance R6, the second light sensation
The first end of submodule 51 and the control terminal of second switch S2 is answered to connect, the second end of the 6th resistance R6, the second photoinduction
The second end of the second end of module 51, the second end of the 7th resistance R7 and third switching tube S3 is grounded, second switch S2's
Second end is connect with the first end of the first end of the 7th resistance R7 and the 8th resistance R8 respectively, the second end of the 8th resistance R8 and the
The control terminal of three switching tube S3 connects；
For second photoinduction submodule 51 when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is bigger,
When intensity of illumination is greater than the second preset value, second switch S2 and third switching tube S3 are turned off, otherwise second switch S2
It is both turned on third switching tube S3.
Specifically, Fig. 3 is referred to, Fig. 3 is the electrical block diagram of the second light sensing module provided by the present invention,
Assuming that the second preset value is 40, when intensity of illumination is less than 40, the voltage at 51 both ends of the second photoinduction submodule is greater than second and opens
Voltage needed for closing pipe S2 and third switching tube S3 conducting, second switch S2 and third switching tube S3 conducting, the second light sense
Module 5 is answered to export high level, the conducting of trigger switch module.
The partial pressure furthermore, it is envisioned that the 5th resistance R5 connects with the 6th resistance R6, when the resistance value of the 5th resistance R5 can
When adjusting, thus it is possible to vary second switch S2 and third switching tube S3 corresponding intensity of illumination when being connected, for example, in intensity of illumination
Second switch S2 and third switching tube S3 can be connected when being 40, certainly, may be implemented completely by adjusting the 5th resistance R5
When intensity of illumination is 35, second switch S2 and third switching tube S3 conducting, when the 5th resistance R5 is resistance value adjustable resistor
When to can be convenient user strong to adjust corresponding illumination when second switch S2 and third switching tube S3 are connected according to the actual situation
Degree, intensity of illumination when so as to adjust switch module conducting.5th resistance R5 can be resistance value adjustable resistor, or its
He, the present invention is it is not limited here.In addition, the second photoinduction submodule 51 can be photo resistance, or other, this hair
It is bright it is not limited here.As can be seen that the intensity of illumination model of the second light sensing module 5 and the induction of the first light sensing module 2
It is different for enclosing, and the second light sensing module 5 needs the trigger switch module when intensity of illumination is bigger to be connected, and the first light
Line induction module 2 triggers the current regulation end of drive module 3 when intensity of illumination is smaller, is supplied to LED light source to reduce
The electric current of module 4 come achieve the purpose that reduce brightness.
It should be noted that above content is a kind of realization side of the second light sensing module 5 provided in this embodiment
Formula, certainly there are also other implementations, the present invention is not particularly limited herein, in addition, it is noted herein that, second
Light sensing module 5 needs as far as possible far from LED light source module 4, to guarantee the accuracy incuded to outdoor intensity of illumination.
Embodiment as one preferred, switch module are the Metal Oxide Semiconductor Field Effect Transistor of P-channel
PMOS, wherein control terminal of the grid of PMOS as switch module, first end of the source electrode of PMOS as switch module, PMOS
Second end of the drain electrode as switch module.
Specifically, switch module can for PMOS (Positive-channel Metal Oxide Semiconductor,
The metal oxide semiconductor transistor of P-channel) pipe, or other, the present invention it is not limited here, using PMOS tube
Switch module have many advantages, such as it is small in size, it is at low cost, the structure of LED power supply system can be made simple, low manufacture cost, the present invention
The LED power supply system of the LED power supply system of offer than in the prior art is more intelligent, and the user experience is improved, and LED advertisement can be sent out
Wave better effect.
Embodiment as one preferred, first switch tube S1, second switch S2 and third switching tube S3 are NPN type
Triode；
Then the collector of NPN type triode as first switch tube S1, second switch S2 and third switching tube S3
One end, control terminal of the base stage of NPN type triode as first switch tube S1, second switch S2 and third switching tube S3, NPN
Second end of the emitter of type triode as first switch tube S1, second switch S2 and third switching tube S3.
Specifically, when first switch tube S1 is NPN type triode, as ambient is dimmed, the first photoinduction submodule
The resistance value of block 21 will will increase, so that the base voltage of NPN type triode increases, when intensity of illumination is less than the first preset value,
Excite NPN type triode conducting.Second switch S2 and third switching tube S3 conducting situation is similar to first switch tube S1, specifically
It can refer to above-mentioned introduction.First switch tube S1, second switch S2 and third switching tube S3 can use NPN type triode,
As long as corresponding movement can be made according to the first preset value and the second preset value, function of the invention can be realized using other
Energy, details are not described herein by the present invention, and also switch tube does not limit.
Using NPN type triode as switching tube make the first light sensing module 2 and the second light sensing module 5 can
The condition of the enhancing of control property, switching tube conducting is very stable, and the signal according to the variation output of extraneous intensity of illumination is more reliable, to protect
The performance for having demonstrate,proved LED power supply system is stablized.
Embodiment as one preferred, the system further include solar powered module, solar powered module and first
Power supply 1 connects, for charging for the first power supply 1.
Specifically, in order to solve the energy source of LED power supply system, make the more power saving of LED power supply system, it can be using too
Positive energy power supply module is the charging of the first power supply 1, at this point, solar powered module stores after converting solar energy into electric energy to first
Power supply 1 can charge to the first power supply 1 during the day, and night disconnects the first power supply 1 and the connection of solar powered module,
First power supply 1 provides electric energy to LED light source as voltage source.First power supply 1 can be battery etc., and solar powered module can
Think several blocks of photovoltaic array plates for being capable of providing enough electric energy, or other, the present invention is it is not limited here.
Embodiment as one preferred, the system further include MPPT maximum power point tracking MPPT controller, MPPT controller
Solar energy end connect with solar powered module, the electric power storage end of MPPT controller is connect with the input terminal of the first power supply 1.
Specifically, it is contemplated that the charge efficiency of solar powered module, it can be by increasing MPPT (Maximum Power
Point Tracking, MPPT maximum power point tracking) controller raising charge efficiency, it is solar powered that MPPT controller passes through adjusting
The working condition of module enables solar powered module to export more electric energy, so as to export solar powered module
Direct current be effectively stored in the first power supply 1, by MPPT controller, power supply system of the invention is more energy efficient, more power saving.
Embodiment as one preferred, drive module 3 include XL6006 chip；
Then output end of the power switch end of XL6006 chip as drive module 3, the feedback end conduct of XL6006 chip
The current regulation end of drive module 3, input terminal of the input terminal of XL6006 chip as drive module 3.
Specifically, Fig. 4 is referred to, Fig. 4 is a kind of electrical block diagram of drive module provided by the present invention, works as drive
When dynamic model block 3 selects XL6006 chip, it can be realized by XL6006 chip shown in Fig. 4 and its peripheral circuit to LED light source
The driving of module 4, XL6006 chip can provide the driving of a medium scale LED light source module 4.Input voltage from
The output voltage of first power supply 1, L are inductance, and D1 is Schottky diode, and CIN is input capacitance, and COUT is output capacitance, when
The structure of right peripheral circuit is not limited to structure shown in Fig. 4.When drive module 3 selects XL6006 chip, XL6006 chip
Input terminal of the input terminal as drive module 3, the first end of the first sampling resistor RS1 and the feedback end of XL6006 chip connect
It connects, when the first light sensing module 2 exports high level (when intensity of illumination is less than the first preset value, i.e. dark), due to stream
The electric current for crossing the first sampling resistor RS1 cannot be mutated, and the resistance value of the first sampling resistor RS1 is constant, so the wink of feedback end detection
When voltage increase, by feedback, the voltage of feedback end can be maintained constant, cause to flow through LED light source module 4 after feedback adjustment
Electric current reduces, and 4 brightness of LED light source module reduces, similarly, when the first light sensing module 2 exports low level (close to 0), i.e.,
Intensity of illumination is greater than the first preset value, when light is not dark, the first sampling resistor RS1 second end ground connection is equivalent to, due to flowing through the
The electric current of one sampling resistor RS1 cannot be mutated, and the resistance value of the first sampling resistor RS1 is constant, so the instantaneous electricity of feedback end detection
Pressure reduces, and by feedback, the voltage of feedback end can be maintained constant, the electric current for flowing through LED light source module 4 is caused after feedback adjustment
Larger, 4 brightness of LED light source module is higher, it is seen then that the present invention can be according to extraneous intensity of illumination come adjust automatically LED light source mould
The brightness of block 4 forms biggish visual contrast so that the brightness when light is brighter of LED light source module 4 is higher, and in light
The brightness of LED light source module 4 is lower when dark, meets human eye in the visual experience of the environment of dark, while can be with power saving, very
Solves the equilibrium problem of power consumption and visual experience well.
It should be noted that the LED light of LED light source module 4 can use concatenated mode, the advantages of this mode is stream
It is the same for crossing the electric current of each LED light, therefore the brightness of LED light is also identical, the unmatched problem of brightness is not present, but this is simultaneously
It is not a kind of restriction.The output end of XL6006 chip can connect multiple LED light, and the power of LED light can be 1W, or
Other power, the present invention is it is not limited here；In addition, may include more LED for some large-scale LED light source modules 4
Lamp, a drive module 3 is clearly that cannot meet the needs at this time, can be in parallel by multiple above-mentioned drive modules 3, and by every
A drive module 3 drives a part of LED light, and the number of drive module 3 can determine that this can satisfy more according to actual needs
The needs of more occasions.In addition, drive module 3 or other structures, the present invention is it is not limited here.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of LED power supply system, which is characterized in that including the first power supply, the first light sensing module, drive module and LED
Light source module；
The output end of first power supply is connect with the input terminal of the drive module, the output end of the drive module with it is described
LED light source module connection, the output end of the first light sensing module are connect with the current regulation end of the drive module；
The first light sensing module is used to adjust its output signal according to intensity of illumination, and the drive module is used for according to institute
The output voltage adjustment for stating output signal and first power supply is exported to the electric current of the LED light source module, wherein the light
It is positively correlated according to intensity and the electric current；
The first light sensing module includes second source, first resistor, second resistance, the first photoinduction submodule, third
Resistance, the 4th resistance, first switch tube, the first sampling resistor and the second sampling resistor；
The output end of the second source connects with the first end of the first end of the first resistor and the first switch tube respectively
Connect, the second end of the first resistor respectively with the first end of the second resistance, the first photoinduction submodule first
End is connected with the control terminal of the first switch tube, and the of the second end of the second resistance, the first photoinduction submodule
The second end of two ends and the 3rd resistor is grounded, the first end of the second end of the first switch tube and the 4th resistance
Connection, the second end of the 4th resistance are connect with the first end of the 3rd resistor, the second end of the 4th resistance and institute
The common end for stating the first end connection of 3rd resistor is electric with the second end of first sampling resistor and second sampling respectively
The first end of resistance connects, the second end ground connection of second sampling resistor, described in the first end conduct of first sampling resistor
The output end of first light sensing module；
For the first photoinduction submodule when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is bigger, when
When intensity of illumination is greater than the first preset value, the first switch tube shutdown, the otherwise first switch tube conducting.
2. system according to claim 1, which is characterized in that the system further includes switch module, the switch module
First end is connect with the output end of first power supply, and the input terminal of the second end of the switch module and the drive module connects
It connects；The switch module is for controlling first power supply as drive module power supply.
3. system according to claim 2, which is characterized in that the switch module is controllable switch module；
Then the system further includes the second light sensing module；
The output end of the second light sensing module is connect with the control terminal of the switch module；
The second light sensing module is used to export first control signal when intensity of illumination is greater than the second preset value, with control
The switch module shutdown, otherwise exports second control signal, to control the switch module closure, wherein described second is pre-
If value is greater than first preset value.
4. system according to claim 3, which is characterized in that the second light sensing module includes third power supply,
Five resistance, the 6th resistance, the second photoinduction submodule, the 7th resistance, the 8th resistance, the 9th resistance, second switch and third
Switching tube；
The output end of the third power supply respectively with the first end, the first end of the second switch and institute of the 5th resistance
The first end connection of the 9th resistance is stated, the second end of the 9th resistance is connect with the first end of the third switching tube, described
The common end that the second end of 9th resistance is connect with the first end of the third switching tube is as the second light sensing module
Output end, the second end of the 5th resistance respectively with the first end of the 6th resistance, the second photoinduction submodule
First end connected with the control terminal of the second switch, second end, the second photoinduction submodule of the 6th resistance
The second end of the second end of block, the second end of the 7th resistance and the third switching tube is grounded, the second switch
Second end connect respectively with the first end of the first end of the 7th resistance and the 8th resistance, the of the 8th resistance
Two ends are connect with the control terminal of the third switching tube；
For the second photoinduction submodule when intensity of illumination is stronger, resistance value is smaller, and when intensity of illumination is weaker, resistance value is bigger, when
When intensity of illumination is greater than second preset value, the second switch and the third switching tube are turned off, and otherwise described the
Two switching tubes and the third switching tube are both turned on.
5. system according to claim 4, which is characterized in that the switch module is that the metal oxide of P-channel is partly led
Body field effect transistor PMOS, wherein control terminal of the grid of the PMOS as the switch module, the source electrode of the PMOS
As the first end of the switch module, second end of the drain electrode of the PMOS as the switch module.
6. system according to claim 5, which is characterized in that the first switch tube, the second switch and described
Third switching tube is NPN type triode；
Then the collector of the NPN type triode is switched as the first switch tube, the second switch and the third
The base stage of the first end of pipe, the NPN type triode is opened as the first switch tube, the second switch and the third
Close the control terminal of pipe, the emitter of the NPN type triode is as the first switch tube, the second switch and described the
The second end of three switching tubes.
7. system according to claim 6, which is characterized in that the system further includes solar powered module, the sun
Energy power supply module is connect with first power supply, for being first power source charges.
8. system according to claim 7, which is characterized in that the system further includes MPPT maximum power point tracking MPPT control
The solar energy end of device, the MPPT controller is connect with the solar powered module, the electric power storage end of the MPPT controller with
The input terminal of first power supply connects.
9. system according to claim 8, which is characterized in that the drive module includes XL6006 chip；
Then output end of the power switch end of the XL6006 chip as the drive module, the feedback of the XL6006 chip
Hold the current regulation end as the drive module, input of the input terminal of the XL6006 chip as the drive module
End.
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| CN201711407166.5A CN108124350B (en) | 2017-12-22 | 2017-12-22 | A kind of LED power supply system |
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| CN201711407166.5A CN108124350B (en) | 2017-12-22 | 2017-12-22 | A kind of LED power supply system |
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| CN108124350B true CN108124350B (en) | 2019-08-06 |
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| CN102927519A (en) * | 2012-11-21 | 2013-02-13 | 倪俊 | Automatic sensitization controlled solar LED lamp |
| CN103052216B (en) * | 2012-12-14 | 2014-12-10 | 重庆恒又源科技发展有限公司 | LED (light emitting diode) control method and system based on light demands |
| CN103547029A (en) * | 2013-09-24 | 2014-01-29 | 昆山桑莱特新能源科技有限公司 | Grille lamp intelligently adjusted according to light environment |
| CN206412068U (en) * | 2016-11-18 | 2017-08-15 | 广州视源电子科技股份有限公司 | LED display screen control circuit, LED display screen and television |
| CN107481663A (en) * | 2017-09-11 | 2017-12-15 | 合肥缤赫信息科技有限公司 | A kind of light modulation LED display control system certainly |
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Address after: No. 208, LianHong Road, Yuanhua Town, Haining City, Jiaxing City, Zhejiang Province Patentee after: HAINING ZHIYANG ELECTRONIC CO.,LTD. Patentee after: ZHEJIANG JINKO SOLAR Co.,Ltd. Patentee after: Jinko Solar Co., Ltd. Address before: No. 208, LianHong Road, Yuanhua Town, Haining City, Jiaxing City, Zhejiang Province Patentee before: HAINING ZHIYANG ELECTRONIC Co.,Ltd. Patentee before: ZHEJIANG JINKO SOLAR Co.,Ltd. Patentee before: JINKO SOLAR Co.,Ltd. |
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