CN209072770U - A kind of circuit for realizing light modulation toning suitable for low current - Google Patents
A kind of circuit for realizing light modulation toning suitable for low current Download PDFInfo
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- CN209072770U CN209072770U CN201821469078.8U CN201821469078U CN209072770U CN 209072770 U CN209072770 U CN 209072770U CN 201821469078 U CN201821469078 U CN 201821469078U CN 209072770 U CN209072770 U CN 209072770U
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Abstract
The utility model discloses a kind of circuits that light modulation toning is realized suitable for low current, including power supply module and control module, power supply module is connect with control module, the first LED module and the second LED module respectively, control module is connect with the first drive module and the second drive module respectively, first drive module is connect with the first LED module, and the second drive module is connect with the second LED module.Have the characteristics that structure is simple, cheap, color temperature adjustment is accurate, output pulse current surplus is small.
Description
Technical field
The utility model belongs to LED circuit technical field, and in particular to a kind of to realize light modulation toning suitable for low current
Circuit.
Background technique
With the progress of LED lighting technology, it is no longer that some high-end lighting apparatus can just have that LED colour temperature, which is adjusted,
Function.With people light colour temperature is required it is higher and higher, from the beginning it is simple illumination by now can to LED light into
Row color temperature adjustment, circuit engineering are being constantly progressive, and the requirement to cost, to the service life becomes higher and higher.In the prior art
In scheme, it is illustrated in figure 6 the minimum circuit arrangement of cost in the market.The colour temperature to LED, brightness regulation may be implemented.But
This design has the disadvantage that: output electric current maximization problems, such as: high color temperature LED, low color temperature LED operating current be all
400MA then must assure that the minimum output pulse current 800MA of power supply, although dimming waveform is as shown in fig. 7, this scheme dims
The cost of circuit part is very low, however, to ensure that the minimum output pulse current 800MA of power supply, considerably increases power unit
Cost and inefficiency.
Utility model content
It is above-mentioned to solve the purpose of this utility model is to provide a kind of circuit for realizing light modulation toning suitable for low current
The problem of being proposed in background technique.A kind of circuit for realizing light modulation toning suitable for low current provided by the utility model, has
The feature that structure is simple, cheap, color temperature adjustment is accurate, output pulse current surplus is small.
To achieve the above object, the utility model provides the following technical solutions: one kind being suitable for low current and realizes that light modulation is adjusted
The circuit of color, including power supply module and control module, power supply module respectively with control module, the first LED module and the 2nd LED
Module connection, control module are connect with the first drive module and the second drive module respectively, the first drive module and the first LED
Module connection, the second drive module are connect with the second LED module.
In the present invention further, control module includes the end PWMA and the end PWMB, wherein is driven with second at the end PWMA
The connection of dynamic model block, the end PWMB is connect with the first drive module.
In the present invention further, the first drive module includes resistance R7, resistance R8, capacitor C2 and N-MOS
Pipe 1, wherein one end of resistance R7 and capacitor C2 are connect with the end PWMB, the other end of resistance R7 and capacitor C2 and the G of N-MOS pipe 1
Pole is connected with one end of resistance R8, and the D grade of N-MOS pipe 1 is connect with the first LED module, the S grade of N-MOS pipe 1 and resistance R8's
The other end is connect with ground terminal.
In the present invention further, the second drive module includes phase inverter U1, resistance R5, resistance R6, capacitor C1
And N-MOS pipe 2, wherein the input terminal of phase inverter U1 is connect with the end PWMA, phase inverter U1 delivery outlet and resistance R5 and capacitor C1
One end connection, the other end of resistance R5 and capacitor C1 connect with one end of the pole G of N-MOS pipe 2 and resistance R6, N-MOS pipe 2
D grades connect with the second LED module, and the S grade of N-MOS pipe 2 and the other end of resistance R6 are connect with ground terminal.
In the present invention further, the first LED module includes light emitting diode WH1, light emitting diode WH2 and hair
Optical diode WH3, wherein light emitting diode WH1, light emitting diode WH2 and light emitting diode WH3 are sequentially connected in series, light-emitting diodes
The cathode of pipe WH1 is connect with the D of N-MOS pipe 1 grade, and the anode of light emitting diode WH3 is connect with power supply module.
In the present invention further, the second LED module includes light emitting diode WL1, light emitting diode WL2 and hair
Optical diode WL3, wherein light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3 are sequentially connected in series, light-emitting diodes
The cathode of pipe WL1 is connect with the D of N-MOS pipe 2 grade, and the anode of light emitting diode WL3 is connect with power supply module.
In the present invention further, control module is single-chip microcontroller, and the PWM signal frequency exported is 4K.
In the present invention further, power supply module is constant voltage output 24V, and maximum output current is the perseverance of 500MA
Potential source.
In the present invention further, the controlling party for being suitable for low current and realizing the circuit of light modulation toning
Method, comprising the following steps:
(1), the colour temperature K of mixed light is first determinedm；Brightness Dx；
Colour temperature KmMeet: KL≤Km≤KH；KLFor LED module low color temperature light source colour temperature value, KHFor LED module high color temperature light source
Color temperature value, KL< KH；
Brightness DxMeet: 0%≤Du≤ 100%；
(2), according to the colour temperature K of mixed lightm, obtain output PWM waveform duty ratio Du；
Formula is Du=1-[(Km-KL)/(KH-KL)]；
(3), the PWM waveform for driving high and low colour temperature is obtained；
PWMA=Du*Dx；
PWMB=1- (1-Du)*Dx；
Wherein: PWMAFor the PWM waveform of driving low color temperature output；PWMBFor the PWM waveform of driving high color temperature output.
In the present invention further, control module includes the end PWMA and the end PWMB, wherein is driven with second at the end PWMA
The connection of dynamic model block, the end PWMB is connect with the first drive module；First drive module include resistance R7, resistance R8, capacitor C2 and
N-MOS pipe 1, wherein one end of resistance R7 and capacitor C2 are connect with the end PWMB, the other end and N-MOS of resistance R7 and capacitor C2
The pole G of pipe 1 is connected with one end of resistance R8, and the D grade of N-MOS pipe 1 is connect with the first LED module, the S grade and electricity of N-MOS pipe 1
The other end of resistance R8 is connect with ground terminal；Second drive module includes phase inverter U1, resistance R5, resistance R6, capacitor C1 and N-
Metal-oxide-semiconductor 2, wherein the input terminal of phase inverter U1 is connect with the end PWMA, one end of phase inverter U1 delivery outlet and resistance R5 and capacitor C1
The other end of connection, resistance R5 and capacitor C1 is connect with one end of the pole G of N-MOS pipe 2 and resistance R6, the D grade of N-MOS pipe 2 with
The connection of second LED module, the S grade of N-MOS pipe 2 and the other end of resistance R6 are connect with ground terminal；First LED module includes hair
Optical diode WH1, light emitting diode WH2 and light emitting diode WH3, wherein light emitting diode WH1, light emitting diode WH2 and hair
Optical diode WH3 is sequentially connected in series, and the cathode of light emitting diode WH1 is connect with the D of N-MOS pipe 1 grade, and light emitting diode WH3 is just
Pole is connect with power supply module；Second LED module includes light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3,
In, light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3 are sequentially connected in series, the cathode and N- of light emitting diode WL1
The D grade of metal-oxide-semiconductor 2 connects, and the anode of light emitting diode WL3 is connect with power supply module；Control module is single-chip microcontroller, and export
PWM signal frequency is 4K；Power supply module is constant voltage output 24V, and maximum output current is the constant pressure source of 500MA.
Compared with prior art, the utility model has the beneficial effects that
1, the utility model power supply module is connect with control module, the first LED module and the second LED module respectively, control
Molding block is connect with the first drive module and the second drive module respectively, and the first drive module is connect with the first LED module, the
Two drive modules are connect with the second LED module, have structure is simple, cheap, color temperature adjustment precisely, more than output pulse current
Measure small feature；
2, control module is MCU control module in the utility model, and output signal is PWM waveform, and programming is simple
Feature；
3, capacitor C1 is in parallel with resistance R5 in the utility model, and capacitor C2 is in parallel with resistance R7, has and N-MOS pipe is accelerated to open
The advantages of pass；
4, the PWM frequency in the utility model is 4K, has the advantages that no stroboscopic in dimming process；
5, the PWM control method and step in the utility model has the advantages that precisely to dim, mix colours.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model；
Fig. 2 is the double-colored light adjusting circuit figure of the utility model；
Fig. 3 is a cycle drive current waveform figure of the utility model circuit；
Fig. 4 is 1 a cycle drive current waveform figure of the utility model embodiment；
Fig. 5 is 2 a cycle drive current waveform figure of the utility model embodiment；
Fig. 6 is conventional double-colored light adjusting circuit in the market；
Fig. 7 is a cycle drive current waveform of circuit in the market；
In figure: 1, power supply module；2, control module；3, the first drive module；4, the second drive module；5, the first LED mould
Block；6, the second LED module.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
Fig. 1-3 is please referred to, the utility model is the following technical schemes are provided: a kind of realize light modulation toning suitable for low current
Circuit, including power supply module 1 and control module 2, power supply module 1 respectively with control module 2, the first LED module 5 and second
LED module 6 connects, and control module 2 is connect with the first drive module 3 and the second drive module 4 respectively, the first drive module 3
It is connect with the first LED module 5, the second drive module 4 is connect with the second LED module 6.
Further, control module 2 includes the end PWMA and the end PWMB, wherein and the end PWMA is connect with the second drive module 4,
The end PWMB is connect with the first drive module 3.
Further, the first drive module 3 includes resistance R7, resistance R8, capacitor C2 and N-MOS pipe 1, wherein resistance
One end of R7 and capacitor C2 are connect with the end PWMB, the other end of resistance R7 and capacitor C2 and the pole G of N-MOS pipe 1 and resistance R8's
One end connection, the D grade of N-MOS pipe 1 connect with the first LED module 5, the other end of the S grade of N-MOS pipe 1 and resistance R8 with connect
Ground terminal connection.
Further, the second drive module 4 includes phase inverter U1, resistance R5, resistance R6, capacitor C1 and N-MOS pipe 2,
Wherein, the input terminal of phase inverter U1 is connect with the end PWMA, and phase inverter U1 delivery outlet is connect with one end of resistance R5 and capacitor C1, electricity
The other end of resistance R5 and capacitor C1 is connect with one end of the pole G of N-MOS pipe 2 and resistance R6, the D grade and the 2nd LED of N-MOS pipe 2
Module 6 connects, and the S grade of N-MOS pipe 2 and the other end of resistance R6 are connect with ground terminal.
Further, the first LED module 5 includes light emitting diode WH1, light emitting diode WH2 and light emitting diode WH3,
Wherein, light emitting diode WH1, light emitting diode WH2 and light emitting diode WH3 are sequentially connected in series, the cathode of light emitting diode WH1 with
The D grade of N-MOS pipe 1 connects, and the anode of light emitting diode WH3 is connect with power supply module 1.
Further, the second LED module 6 includes light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3,
Wherein, light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3 are sequentially connected in series, the cathode of light emitting diode WL1 with
The D grade of N-MOS pipe 2 connects, and the anode of light emitting diode WL3 is connect with power supply module 1.
R5, resistance R6, resistance R7, resistance R8 in the present embodiment select Yancheng City Xing Tai electronic equipment Co., Ltd to sell
The RX21 wirewound resistor sold；The 16v270 that capacitor C1 and capacitor C2 selects Ji photoelectron Science and Technology Ltd., Shantou City to sell
Type capacitor.
Resistance R5 and resistance R7 resistance value are 1-5K ohm in the present embodiment；Resistance R6 and resistance R8 resistance value are the Europe 10-15K
Nurse；Capacitor C1 and capacitor C2 is 20-200 pico farad；N-MOS pipe is N-channel MOS pipe, and N-MOS pipe selects the CJ2310 of long electricity science and technology
Type metal-oxide-semiconductor.
Power supply module 1 in the present embodiment is constant voltage output 24V, and maximum output current is the constant pressure source of 500MA, selects Hangzhoupro
The LRS-350-24 type power supply of Zhou Kafang Science and Technology Ltd. sale；Control module 2 uses 8 single-chip microcontrollers of PIC12F1822,
Major function is the two-way pwm signal that output frequency is 4K；First LED module 5 uses Si Mai get, the 2700K color of 2835 encapsulation
Warm color light source, 6 Si Mai get of the second LED module, the 6500K colour temperature cool colour light source of 2835 encapsulation, LED drive current 400MA.
Further, the control method of the circuit described in the utility model that light modulation toning is realized suitable for low current, packet
Include following steps:
(1), the colour temperature K of mixed light is first determinedm；Brightness Dx；
Colour temperature KmMeet: KL≤Km≤KH；KLFor LED module low color temperature light source colour temperature value, KHFor LED module high color temperature light source
Color temperature value, KL≤KH；
Brightness DxMeet: 0%≤Du≤ 100%；
(2), according to the colour temperature K of mixed lightm, obtain output PWM waveform duty ratio Du；
Formula is Du=1- (Km-KL)/(KH-KL)；
(3), the PWM waveform for driving high and low colour temperature is obtained；
PWMA=Du*Dx；
PWMB=1- (1-Du)*Dx；
Wherein: PWMAFor the PWM waveform of driving low color temperature output；PWMBFor the PWM waveform of driving high color temperature output；
PWMA, PWMBFor the waveform exported after Fig. 2 circuit inverter, it is as shown in Figure 3 for driving the waveform of LED.
It is specific in the present embodiment:
(1), the colour temperature K of mixed light is first determinedm=4000K；Brightness Dx=100%；
(2), according to the colour temperature K of mixed lightm, obtain output PWM waveform duty ratio Du；
Formula is Du=1-[(Km-KL)/(KH-KL)]；
Du=34%；
(3), the PWM waveform for driving high and low colour temperature is obtained:
PWMA=Du*Dx；
PWMA=34%；
PWMB=1- (1-Du)*Dx；
PWMB=34%；
Output waveform is Fig. 4.
The PMS-80 spectral investigator test color temperature value in an output light distant place is 4013K.
For the present embodiment control module 2 using 8 single-chip microcontrollers of PIC12F1822, major function is two that output frequency is 4K
Road pwm signal has the characteristics that programming is simple；The PWM signal frequency of output is 4K, is had in dimming process without frequency
It dodges；PWM control method and step in the utility model have the advantages that precisely to dim, mix colours.
Embodiment 2:
This embodiment differs from embodiment 1 in that: power supply module and control module in the present embodiment select application
Mobile terminal imaging auxiliary device disclosed in numbers 201520309010.3 (notification number: CN204613558U, the day for announcing:
2015.09.02) disclosed in power supply module and control module, specifically are as follows:
(1), the colour temperature K of mixed light is first determinedm=4000K；Brightness Dx=40%；
(2), according to the colour temperature K of mixed lightm, obtain output PWM waveform duty ratio Du；
Formula is Du=1-[(Km-KL)/(KH-KL)]；
Du=34%；
(3), the PWM waveform for driving high and low colour temperature is obtained
PWMA=Du*Dx；
PWMA=17%；
PWMB=1- (1-Du)*Dx；
PWMB=67%；
Output waveform is Fig. 5,
The PMS-80 spectral investigator test color temperature value in an output light distant place is 4021K.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (8)
1. a kind of circuit for realizing light modulation toning suitable for low current, including power supply module (1) and control module (2), feature
Be: power supply module (1) is connect with control module (2), the first LED module (5) and the second LED module (6) respectively, controls mould
Block (2) is connect with the first drive module (3) and the second drive module (4) respectively, the first drive module (3) and the first LED mould
Block (5) connection, the second drive module (4) are connect with the second LED module (6).
2. a kind of circuit for realizing light modulation toning suitable for low current according to claim 1, it is characterised in that: control mould
Block (2) includes the end PWMA and the end PWMB, wherein the end PWMA is connect with the second drive module (4), the end PWMB and the first drive module
(3) it connects.
3. a kind of circuit for realizing light modulation toning suitable for low current according to claim 2, it is characterised in that: first drives
Dynamic model block (3) includes resistance R7, resistance R8, capacitor C2 and N-MOS pipe 1, wherein one end and PWMB of resistance R7 and capacitor C2
The other end of end connection, resistance R7 and capacitor C2 are connect with one end of the pole G of N-MOS pipe 1 and resistance R8, the D grade of N-MOS pipe 1
It is connect with the first LED module (5), the S grade of N-MOS pipe 1 and the other end of resistance R8 are connect with ground terminal.
4. a kind of circuit for realizing light modulation toning suitable for low current according to claim 3, it is characterised in that: second drives
Dynamic model block (4) includes phase inverter U1, resistance R5, resistance R6, capacitor C1 and N-MOS pipe 2, wherein the input terminal of phase inverter U1
It is connect with the end PWMA, phase inverter U1 delivery outlet is connect with one end of resistance R5 and capacitor C1, the other end of resistance R5 and capacitor C1
It is connect with one end of the pole G of N-MOS pipe 2 and resistance R6, the D grade of N-MOS pipe 2 and the second LED module (6) connect, N-MOS pipe 2
S grade and the other end of resistance R6 connect with ground terminal.
5. a kind of circuit for realizing light modulation toning suitable for low current according to claim 4, it is characterised in that: first
LED module (5) includes light emitting diode WH1, light emitting diode WH2 and light emitting diode WH3, wherein light emitting diode WH1,
Light emitting diode WH2 and light emitting diode WH3 are sequentially connected in series, and the cathode of light emitting diode WH1 is connect with the D of N-MOS pipe 1 grade,
The anode of light emitting diode WH3 is connect with power supply module (1).
6. a kind of circuit for realizing light modulation toning suitable for low current according to claim 5, it is characterised in that: second
LED module (6) includes light emitting diode WL1, light emitting diode WL2 and light emitting diode WL3, wherein light emitting diode WL1,
Light emitting diode WL2 and light emitting diode WL3 are sequentially connected in series, and the cathode of light emitting diode WL1 is connect with the D of N-MOS pipe 2 grade,
The anode of light emitting diode WL3 is connect with power supply module (1).
7. a kind of circuit for realizing light modulation toning suitable for low current according to claim 6, it is characterised in that: control mould
Block (2) is single-chip microcontroller, and the PWM signal frequency exported is 4K.
8. a kind of circuit for realizing light modulation toning suitable for low current according to claim 7, it is characterised in that: power supply mould
Block (1) is constant voltage output 24V, and maximum output current is the constant pressure source of 500MA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821469078.8U CN209072770U (en) | 2018-09-07 | 2018-09-07 | A kind of circuit for realizing light modulation toning suitable for low current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821469078.8U CN209072770U (en) | 2018-09-07 | 2018-09-07 | A kind of circuit for realizing light modulation toning suitable for low current |
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| CN209072770U true CN209072770U (en) | 2019-07-05 |
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ID=67091943
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| CN201821469078.8U Active CN209072770U (en) | 2018-09-07 | 2018-09-07 | A kind of circuit for realizing light modulation toning suitable for low current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966431A (en) * | 2018-09-07 | 2018-12-07 | 横店集团得邦照明股份有限公司 | A kind of circuit and its control method for realizing light modulation toning suitable for low current |
-
2018
- 2018-09-07 CN CN201821469078.8U patent/CN209072770U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108966431A (en) * | 2018-09-07 | 2018-12-07 | 横店集团得邦照明股份有限公司 | A kind of circuit and its control method for realizing light modulation toning suitable for low current |
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