CN209627758U - A kind of LED control circuit of compatible light modulation color-temperature regulating - Google Patents
A kind of LED control circuit of compatible light modulation color-temperature regulating Download PDFInfo
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- CN209627758U CN209627758U CN201822183876.0U CN201822183876U CN209627758U CN 209627758 U CN209627758 U CN 209627758U CN 201822183876 U CN201822183876 U CN 201822183876U CN 209627758 U CN209627758 U CN 209627758U
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Abstract
The utility model discloses a kind of LED control circuits of compatible light modulation color-temperature regulating, including cold color temperature lamp, warm color temperature lamp, isolation constant-current supply, the controllable silicon dimmer of output electric current for adjusting isolation constant-current supply and for corresponding to the single-chip microcontroller U1 of output pwm signal according to the output electric current of isolation constant-current supply, and the PWM switch module for being used for transmission the output electric current that constant-current supply is isolated and cold color temperature lamp being connected according to pwm signal, warms up color temperature lamp；The isolation constant-current supply is connected respectively to controllable silicon dimmer, single-chip microcontroller U1, cold color temperature lamp and warm color temperature lamp, and the single-chip microcontroller U1 is connected respectively to cold color temperature lamp and warm color temperature lamp by PWM switch module.Compared to traditional technology, the utility model is safe and simple, low in cost, and do not limit that the electric current for flowing through cold, the warm color temperature lamp of two-way and can be avoided occurs in dimming process prominent flashes as using effect is more excellent.
Description
Technical field
The utility model relates to LED control circuit, especially a kind of LED control circuit of compatible light modulation color-temperature regulating.
Background technique
In field of light fittings, currently a popular light modulation color-temperature regulating scheme generally has upper limit requirement to the electric current for flowing through lamp bead,
This brings some limitations when designing corresponding illuminating circuit and increases cost, and has significantly during color temperature adjustment
It is prominent to dodge, that is, it cannot achieve stable light modulation, this influences whether the visual effect of user experience lamps and lanterns.
Utility model content
To solve the above-mentioned problems, the purpose of the utility model is to provide a kind of LED of compatible light modulation color-temperature regulating to control electricity
Road, it is safe and simple, it is low in cost, the electric current for flowing through cold, the warm color temperature lamp of two-way is not limited and can be avoided occurs in dimming process
It is prominent flash as.
In order to make up for the deficiencies of the prior art, the utility model embodiment the technical solution adopted is that:
A kind of LED control circuit of compatible light modulation color-temperature regulating, including cold color temperature lamp, warm color temperature lamp, isolation constant-current supply, use
In the controllable silicon dimmer for the output electric current for adjusting isolation constant-current supply and for the output electric current pair according to isolation constant-current supply
The single-chip microcontroller U1 of output pwm signal is answered, and is used for transmission the output electric current of isolation constant-current supply and is connected according to pwm signal cold
The PWM switch module of color temperature lamp, warm color temperature lamp；The isolation constant-current supply be connected respectively to controllable silicon dimmer, single-chip microcontroller U1,
Cold color temperature lamp and warm color temperature lamp, the single-chip microcontroller U1 are connected respectively to cold color temperature lamp and warm color temperature lamp by PWM switch module.
It further, further include for providing the power supply module of voltage for single-chip microcontroller U1, the isolation constant-current supply passes through
Power supply module is connected to single-chip microcontroller U1.
Further, the power supply module includes resistance R27, capacitor C13, resistance R28, triode Q3, zener diode
ZD2, capacitor C14 and capacitor C101；Two end resistance R28 is connected between the base stage and collector of triode Q3, the monolithic
The Input voltage terminal of machine U1 and the emitter of triode pass through capacitor C14/ capacitor C101 and are connected to reference to ground；The pressure stabilizing two
The anode of pole pipe ZD2 is connected to reference to ground, and cathode is connected to the base stage of triode Q3；One end of the resistance R27 be connected to every
From constant-current supply, the other end is connected respectively to the collector of capacitor C13 and triode Q3, and an end of the capacitor C13 is connected to ginseng
Examine ground.
Further, the PWM switch module includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R103, resistance R104, resistance
R105 and resistance R106；The grid of the metal-oxide-semiconductor Q1 is connected to the first PWM output end of single-chip microcontroller by resistance R103 and leads to
It crosses resistance R104 to be connected to reference to ground, the drain electrode of the metal-oxide-semiconductor Q1 is connected to cold color temperature lamp；The grid of the metal-oxide-semiconductor Q2 passes through
Resistance R105 is connected to the 2nd PWM output end of single-chip microcontroller and is connected to by resistance R106 with reference to ground, the metal-oxide-semiconductor Q2's
Drain electrode is connected to warm color temperature lamp.
Further, the cold color temperature lamp is that several LED series connection is formed by lamp group.
Further, the warm color temperature lamp is that several LED series connection is formed by lamp group.
The one or more technical solutions provided in the utility model embodiment, at least have the following beneficial effects: isolation
The output electric current of constant-current supply is flowed into cold color temperature lamp and warm color temperature lamp, is obtained by PWM switch module by two-way color temperature lamp
To the current information and single-chip microcontroller U1 is passed to, single-chip microcontroller U1 is according to the current information accordingly with the PWM waveform of different duty
Control the conducting of PWM switch module so that two-way color temperature lamp is accordingly lighted, due to using PWM mode driving rather than electric current is straight
The mode of conducting is connect, therefore need to only consider that input current corresponds to the colour temperature and the corresponding PWM duty cycle of colour temperature of two-way lamp bead, also
Circuit can be simplified without limiting the electric current for flowing into lamp bead, therefore in design, it is corresponding cost-saved；Further,
Using the output electric current of the adjustable isolation constant-current supply of controllable silicon dimmer, so that isolation constant-current supply exports electricity from highest
When stream changes to minimum output current, corresponding two-way lamp bead is from most cool colour temperature linear change to most warm colour temperature；Meanwhile constant current is isolated
When power supply is from highest output curent change to minimum output current, two-way lamp bead can be bright from maximum brightness linear change to minimum
Degree, since it is linear change rather than electric current moment is passed through and becomes larger or become smaller, can to avoid lamps and lanterns it is prominent flash as.Cause
This, the utility model is safe and simple, and it is low in cost, the electric current for flowing through cold, the warm color temperature lamp of two-way is not limited and can be avoided appearance
Prominent in dimming process flashes as using effect is more excellent.
Detailed description of the invention
The utility model preferred embodiment is provided, with reference to the accompanying drawing the embodiments of the present invention are described in detail.
Fig. 1 is the structural representation schematic diagram of the utility model embodiment；
Fig. 2 is the circuit diagram of the utility model embodiment.
Specific embodiment
Colour temperature and lumen value are two important optical parameters.The adjusting of lamps and lanterns colour temperature needs to cooperate not according to client
Same usage scenario, as the colour temperature of fine day and cloudy day needs may be different, it is also necessary to existing interior decoration style etc.
Match；The height of size, light-emitting surface from photographed object that the part of lumen value needs the illumination for needing to obtain according to photographed object, illuminates space
The many kinds of parameters such as the spacing between degree and multiple lamps and lanterns are comprehensive to be determined.
In field of light fittings, currently a popular light modulation color-temperature regulating scheme generally has upper limit requirement to the electric current for flowing through lamp bead,
This is that limitation brought by lamp bead is directly driven as input current, this brought when designing corresponding illuminating circuit it is some limitation and
Cost is increased, and has apparent prominent sudden strain of a muscle during color temperature adjustment, this is because being passed through the electric current instantaneous variation institute of lamps and lanterns
Bring cannot achieve stable light modulation, this influences whether the visual effect of user experience lamps and lanterns, but also may be damaged lamp
Tool.
Based on this, referring to Figures 1 and 2, the embodiments of the present invention provide a kind of LED control of compatible light modulation color-temperature regulating
Including cold color temperature lamp 100, warm color temperature lamp 110, constant-current supply 150 is isolated, for adjusting isolation constant-current supply 150 in circuit processed
Export the controllable silicon dimmer 140 of electric current and for corresponding to output pwm signal according to the output electric current of isolation constant-current supply 150
Single-chip microcontroller U1, and be used for transmission the output electric current of isolation constant-current supply 150 and cold color temperature lamp 100 is connected according to pwm signal, is warmed up
The PWM switch module 120 of color temperature lamp 110；The isolation constant-current supply 150 be connected to controllable silicon dimmer 140, single-chip microcontroller U1,
Cold color temperature lamp 100 and warm color temperature lamp 110, the single-chip microcontroller U1 are connected respectively to cold color temperature lamp 100 by PWM switch module 120
With warm color temperature lamp 110.
In the present embodiment, in Fig. 2, LED+ indicates isolation 150 output head anode of constant-current supply, and does not show that in figure
Controllable silicon dimmer 140.
Using isolation constant-current supply 150, wherein isolated power supply refers to that input terminal and output end realize electricity by transformer
A kind of power supply of gas connection, the conversion process of transformer is: electricity-magnetic-electricity, will not since it with the earth without connecting
Danger Electric shock risk occurs, and on existing lamps and lanterns commonly used by non-isolated power supply circuit be that pass through input power direct after buck
It is added in LED load, since it is common ground connection, there is Danger Electric shock risk；Also, isolated power supply, compared to non-isolated electricity
Source, output high-low voltage realize that isolation, safety are higher.
The structure of controllable silicon dimmer 140 has been disclosed in the prior art, including ghyristor circuit described hereinafter,
Therefore it does not repeat, its principle is only briefly described: controllable silicon dimmer 140 is adjusted in light modulation by ghyristor circuit thereon
Input current waveform phase, thus realize gear switch, it is corresponding to adjust isolation Constant Electric Current from highest gear to lowest gear
Source 150 exports maximum current to minimum current, therefore can be convenient and effectively carry out output electric current tune to isolation constant-current supply 150
Section, to reach light modulation purpose.
The output electric current of isolation constant-current supply 150 is flowed into cold color temperature lamp 100 and warm color temperature lamp 110, by PWM switching molding
Block 120 gets the current information by two-way color temperature lamp and passes to single-chip microcontroller U1, and single-chip microcontroller U1 is corresponding according to the current information
Be connected with the PWM waveform of different duty control PWM switch module 120 so that two-way color temperature lamp is accordingly lighted, due to using
Be PWM mode driving rather than the mode that is directly connected of electric current, therefore need to only consider that input current corresponds to the colour temperature of two-way lamp bead
And the corresponding PWM duty cycle of colour temperature, also with regard to electricity can be simplified without limiting the electric current for flowing into lamp bead, therefore in design
Road, it is corresponding cost-saved；Further, the output electricity of the adjustable isolation constant-current supply 150 of controllable silicon dimmer 140 is utilized
Stream, so that corresponding two-way lamp bead is from most when isolation constant-current supply 150 is from highest output curent change to minimum output current
Cool colour temperature linear change is to most warm colour temperature；Simultaneously as output total current is bigger, lamp brightness is higher, therefore Constant Electric Current is isolated
When source 150 is from highest output curent change to minimum output current, two-way lamp bead can be bright from maximum brightness linear change to minimum
Degree, since it is linear change rather than electric current moment is passed through and becomes larger or become smaller, can to avoid lamps and lanterns it is prominent flash as.Cause
This, the utility model is safe and simple, and it is low in cost, the electric current for flowing through cold, the warm color temperature lamp 110 of two-way is not limited and can be avoided out
Prominent in existing dimming process flashes as using effect is more excellent.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, it further include for providing the power supply module 130 of voltage for single-chip microcontroller U1, the isolation constant-current supply 150 passes through power supply module
130 are connected to single-chip microcontroller U1.In the present embodiment, the voltage that constant-current supply 150 is isolated can be sent to list by power supply module 130
Piece machine U1 guarantees that single-chip microcontroller U1 can normally execute various functions to carry out power supply for single-chip microcontroller U1, is conducive to promote circuit
Whole stability.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the power supply module 130 includes resistance R27, capacitor C13, resistance R28, triode Q3, zener diode ZD2, capacitor C14
With capacitor C101；Two end resistance R28 is connected between the base stage and collector of triode Q3, the input electricity of the single-chip microcontroller U1
The emitter of pressure side and triode passes through capacitor C14/ capacitor C101 and is connected to reference to ground；The zener diode ZD2 is just
Pole is connected to reference to ground, and cathode is connected to the base stage of triode Q3；One end of the resistance R27 is connected to isolation constant-current supply
150, the other end is connected respectively to the collector of capacitor C13 and triode Q3, and an end of the capacitor C13 is connected to reference to ground.
In the present embodiment, capacitor C13, capacitor C14 and capacitor C101 play conducting every miscellaneous effect, zener diode
ZD2 plays the role of the base terminal voltage of stable triode Q3, and resistance R27 is used for 150 input current of load isolation constant-current supply,
To provide input voltage for the collector of resistance R28 and triode Q3, and single-chip microcontroller is transported to by the emitter of triode Q3
The Input voltage terminal of U1.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the PWM switch module 120 includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R103, resistance R104, resistance R105 and resistance
R106；The grid of the metal-oxide-semiconductor Q1 is connected to the first PWM output end of single-chip microcontroller by resistance R103 and passes through resistance R104
It is connected to reference to ground, the drain electrode of the metal-oxide-semiconductor Q1 is connected to cold color temperature lamp 100；The grid of the metal-oxide-semiconductor Q2 passes through resistance R105
It is connected to the 2nd PWM output end of single-chip microcontroller and is connected to by resistance R106 with reference to ground, the drain electrode connection of the metal-oxide-semiconductor Q2
To warm color temperature lamp 110.
In the present embodiment, metal-oxide-semiconductor Q1 is realized by receiving the PWM waveform of the first PWM output end transmission to cold
The switch of color temperature lamp 100 drives, and correspondingly, metal-oxide-semiconductor Q2 is by receiving the PWM waveform that the 2nd PWM output end transmits come real
Now the switch of warm color temperature lamp 110 is driven, the duty ratio of the two is changed linearly with the variation of input current, therefore visible MOS
Pipe Q1 and metal-oxide-semiconductor Q2 play the role of good switch conduction；Resistance R103 and resistance R105 plays PWM waveform conducting and makees
With so that PWM waveform transmission is more stable；Resistance R104 and resistance R106 plays two metal-oxide-semiconductor grid stored charges of releasing
Effect, prevent from misleading, auxiliary control two metal-oxide-semiconductors switching function.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the resistance R103 is identical with the specification of resistance R105.In the present embodiment, the purpose of such setting is to guarantee two-way PWM
Output waveform, to maintain the duty ratio of two outputs, is conducive to lamp because influence suffered by external balance resistance is consistent
Tool driving is accurately controlled.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the resistance R104 is identical with the specification of resistance R106.In the present embodiment, the purpose of such setting is to guarantee two-way colour temperature
The input current of load stablizes transmission, reduces influence of the non-essential resistance to it, is conducive to accurate perception current information, thus accurately
Output pwm signal.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the warm color temperature lamp 110 is that several LED series connection is formed by lamp group；In the present embodiment, the warm color temperature lamp being arranged in this way
110 shine it is relatively stable, can self-setting as shown in Fig. 2, wherein the n in Hn is specific series connection number.
Further, the embodiments of the present invention additionally provide a kind of LED control circuit of compatible light modulation color-temperature regulating,
In, the cold color temperature lamp 100 is that several LED series connection is formed by lamp group；In the present embodiment, the cold color temperature lamp being arranged in this way
100 shine it is relatively stable, can self-setting as shown in Fig. 2, wherein the n in Ln is specific series connection number.
Further, referring to Figures 1 and 2, the embodiments of the present invention additionally provide a kind of compatible light modulation color-temperature regulating
LED control circuit, wherein including cold color temperature lamp 100, warm color temperature lamp 110, resistance R27, capacitor C13, resistance R28, triode
Q3, zener diode ZD2, capacitor C14, capacitor C101, isolation constant-current supply 150, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R103, electricity
Resistance R104, resistance R105, resistance R106,140 and of controllable silicon dimmer for exporting electric current for adjusting isolation constant-current supply 150
For corresponding to the single-chip microcontroller U1 of output pwm signal according to the output electric current of isolation constant-current supply 150；The resistance R28 two is terminated
Between the base stage and collector of triode Q3, the Input voltage terminal of the single-chip microcontroller U1 and the emitter of triode pass through electricity
Hold C14/ capacitor C101 to be connected to reference to ground；The anode of the zener diode ZD2 is connected to reference to ground, and cathode is connected to three poles
The base stage of pipe Q3；One end of the resistance R27 is connected to isolation constant-current supply 150, and the other end is connected respectively to capacitor C13 and three
The collector of pole pipe Q3, an end of the capacitor C13 are connected to reference to ground；The grid of the metal-oxide-semiconductor Q1 is connected by resistance R103
It is connected to the first PWM output end of single-chip microcontroller and by resistance R104 with reference to ground, the drain electrode of the metal-oxide-semiconductor Q1 is connected to cold
Color temperature lamp 100；The grid of the metal-oxide-semiconductor Q2 is connected to the 2nd PWM output end of single-chip microcontroller by resistance R105 and passes through electricity
Resistance R106 is connected to reference to ground, and the drain electrode of the metal-oxide-semiconductor Q2 is connected to warm color temperature lamp 110；The cold color temperature lamp 100 is several
LED series connection is formed by lamp group, and the warm color temperature lamp 110 is that several LED series connection is formed by lamp group.
In the present embodiment, resistance R27, capacitor C13, resistance R28, triode Q3, zener diode ZD2, capacitor C14 and
The combinational circuit of capacitor C101 is for realizing power supply for single-chip microcontroller U1, when controllable silicon dimmer 140, which is adjusted, arrives highest gear, every
Maximum current is exported from constant-current supply 150, lamps and lanterns have maximum brightness at this time, and lamps and lanterns colour temperature is most cool colour temperature, it is assumed that it is 4000k,
Correspondingly, the first PWM duty cycle of corresponding output is 100% (corresponding cold color temperature lamp 100), and the second PWM duty cycle is 0 (corresponding warm
Color temperature lamp 110), to carry out control；Conversely, constant-current supply is isolated when controllable silicon dimmer 140 adjusts and arrives lowest gear
150 output minimum currents, lamps and lanterns are most dark at this time, and lamps and lanterns colour temperature is most warm colour temperature, it is assumed that are 2700k, one PWM duty of corresponding output
Than for 0 (corresponding cold color temperature lamp 100), the second PWM duty cycle is 100% (corresponding warm color temperature lamp 110), to carry out control；With
This analogizes, when adjusting 140 gear of controllable silicon dimmer from high tap position to low-grade location, or when from low-grade location to high tap position, similarly
The output corresponding duty ratio of two-way PWM can be corresponded to, the effect of linear change is reached, to control lamp brightness and colour temperature
Achieve the effect that linear change.
The preferred embodiment of the utility model and basic principle is discussed in detail in the above content, but the utility model is simultaneously
It is not limited to above embodiment, those skilled in the art should be recognized that in the premise without prejudice to the spirit of the present invention
Under also have various equivalent variations and replacement, these equivalent variations and replacement both fall within the scope of the claimed invention
It is interior.
Claims (6)
1. a kind of LED control circuit of compatible light modulation color-temperature regulating, it is characterised in that: including cold color temperature lamp (100), warm color temperature lamp
(110), constant-current supply (150), the controllable silicon dimmer for exporting electric current for adjusting isolation constant-current supply (150) is isolated
(140) it and is used to correspond to the single-chip microcontroller U1 of output pwm signal according to the output electric current of isolation constant-current supply (150), and is used for
The output electric current of transmission isolation constant-current supply is simultaneously opened according to the PWM of the cold color temperature lamp (100) of pwm signal conducting, warm color temperature lamp (110)
It closes module (120)；The isolation constant-current supply (150) is connected respectively to controllable silicon dimmer (140), single-chip microcontroller U1, cool colour temperature
Lamp (100) and warm color temperature lamp (110), the single-chip microcontroller U1 are connected respectively to cold color temperature lamp by PWM switch module (120)
(100) and warm color temperature lamp (110).
2. a kind of LED control circuit of compatible light modulation color-temperature regulating according to claim 1, it is characterised in that: further include using
In providing the power supply module (130) of voltage for single-chip microcontroller U1, the isolation constant-current supply (150) is connected by power supply module (130)
It is connected to single-chip microcontroller U1.
3. a kind of LED control circuit of compatible light modulation color-temperature regulating according to claim 2, it is characterised in that: the power supply
Module (130) includes resistance R27, capacitor C13, resistance R28, triode Q3, zener diode ZD2, capacitor C14 and capacitor
C101；Two end resistance R28 is connected between the base stage and collector of triode Q3, the Input voltage terminal of the single-chip microcontroller U1 and
The emitter of triode passes through capacitor C14/ capacitor C101 and is connected to reference to ground；The anode connection of the zener diode ZD2
With arriving reference, cathode is connected to the base stage of triode Q3；One end of the resistance R27 is connected to isolation constant-current supply (150), separately
One end is connected respectively to the collector of capacitor C13 and triode Q3, and an end of the capacitor C13 is connected to reference to ground.
4. a kind of LED control circuit of compatible light modulation color-temperature regulating according to claim 1, it is characterised in that: the PWM is opened
Closing module (120) includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R103, resistance R104, resistance R105 and resistance R106；The metal-oxide-semiconductor
The grid of Q1 is connected to the first PWM output end of single-chip microcontroller by resistance R103 and is connected to by resistance R104 with reference to ground,
The drain electrode of the metal-oxide-semiconductor Q1 is connected to cold color temperature lamp (100)；The grid of the metal-oxide-semiconductor Q2 is connected to monolithic by resistance R105
It 2nd PWM output end of machine and is connected to by resistance R106 with reference to ground, the drain electrode of the metal-oxide-semiconductor Q2 is connected to warm color temperature lamp
(110)。
5. a kind of LED control circuit of compatible light modulation color-temperature regulating according to claim 1 to 4, it is characterised in that: institute
Stating cold color temperature lamp (100) is that several LED series connection is formed by lamp group.
6. a kind of LED control circuit of compatible light modulation color-temperature regulating according to claim 1 to 4, it is characterised in that: institute
Stating warm color temperature lamp (110) is that several LED series connection is formed by lamp group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183876.0U CN209627758U (en) | 2018-12-24 | 2018-12-24 | A kind of LED control circuit of compatible light modulation color-temperature regulating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183876.0U CN209627758U (en) | 2018-12-24 | 2018-12-24 | A kind of LED control circuit of compatible light modulation color-temperature regulating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112074045A (en) * | 2020-08-10 | 2020-12-11 | 广州美术学院 | Can adjust jewelry display device of lamps and lanterns colour temperature |
| CN112533329A (en) * | 2020-11-27 | 2021-03-19 | 珠海市圣昌电子有限公司 | Light and color temperature adjusting circuit of constant current power supply and overlapped PWM (pulse-width modulation) color temperature adjusting method |
-
2018
- 2018-12-24 CN CN201822183876.0U patent/CN209627758U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112074045A (en) * | 2020-08-10 | 2020-12-11 | 广州美术学院 | Can adjust jewelry display device of lamps and lanterns colour temperature |
| CN112533329A (en) * | 2020-11-27 | 2021-03-19 | 珠海市圣昌电子有限公司 | Light and color temperature adjusting circuit of constant current power supply and overlapped PWM (pulse-width modulation) color temperature adjusting method |
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