CN206650895U - A kind of tunable optical color-adjustable RGB LEDs of direct current supply - Google Patents
A kind of tunable optical color-adjustable RGB LEDs of direct current supply Download PDFInfo
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- CN206650895U CN206650895U CN201720416434.9U CN201720416434U CN206650895U CN 206650895 U CN206650895 U CN 206650895U CN 201720416434 U CN201720416434 U CN 201720416434U CN 206650895 U CN206650895 U CN 206650895U
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Abstract
The utility model discloses a kind of tunable optical color-adjustable RGB LEDs of direct current supply, the DC DC constant-current driven modules independently exported including control module, interface module and three tunnels, three road DC DC constant-current driven modules are connected with direct current DC inputs, output constant current driving R LED strips, G LED strips and B LED strips respectively, control module export three road pwm signals and control three road DC DC constant-current driven modules DC DC constant-current driven modules is adjusted output constant current value respectively；Interface module is connected with control module, and for accessing intelligent illuminating system and receiving external control instruction, the pwm signal that three road different proportions are exported according to external control instruction control module dims toning so as to realize.The technical solution of the utility model, the pwm signal that three tunnel independences are produced using PIC12F1572 single-chip microcomputers drives the RGB LED strips of three tunnel independences, so as to easily realize light modulation toning.
Description
Technical field
It the utility model is related to field of LED drive, more particularly to a kind of tunable optical color-adjustable RGB-LED of direct current supply
Lamp.
Background technology
At present, illumination based on RGB-LED primitive colours LEDs because the implementation of its light modulation toning can provide abundant light source and
Gradually it is valued by people.LED light source based on three primary colors RGB is mainly used in LED display board, display backlight source, builds
The decoration of thing and landscape, indoor and outdoor and street light illumination are built, improves sleep in bedroom, agriculture field improves the growth hair of animals and plants
Educate.
The mode of LED light modulations mainly has simulation to dim, bidirectional triode thyristor IGCT TRIAC light modulations, the mode such as PWM light modulations,
Suitable for the dimming mode of RGB-LED drivings, and optimal dimming mode is PWM light modulations.It is that PWM is adjusted that this, which is primarily due to one,
Advantage possessed by trimmed book body, consistent brightness can be such as obtained, be not in suddenly bright suddenly dark phenomenon；Second, PWM light modulations can
To be easily connected with digit chips such as MCU, realize it is intelligentized light modulation toning and it is intelligentized networking etc. control, easily with
Computer technology, the network communications technology, image processing techniques, embedded Control technology etc. blend, so as to realize intelligent control.
Therefore PWM light modulations are RGB-LED drivings and the bridge of control terminal, are the trend of RGB-LED driving light regulating technology development.
Therefore for drawbacks described above present in currently available technology, it is necessary to be studied in fact, to provide a kind of scheme,
Solves defect present in prior art.
Utility model content
A kind of in order to overcome the shortcomings of the prior art, tunable optical color-adjustable RGB- it is necessory to provide direct current supply
LED, realize that the light modulation of LED drivings is mixed colours with a kind of simple circuit structure and control, and can easily be connect by interface module
Enter intelligent illuminating system.
In order to solve technical problem existing for prior art, the technical solution of the utility model is as follows：
A kind of tunable optical color-adjustable RGB-LED lamps of direct current supply, including control module, interface module and three tunnels are independently defeated
The DC-DC constant-current driven modules gone out, wherein,
Three road DC-DC constant-current driven modules are connected with direct current DC inputs, respectively output constant current driving R-LED strings, G-
LED strip and B-LED strings, the R-LED go here and there for sending feux rouges；The G-LED goes here and there for sending green glow；The B-LED strings are used
In sending blue light；
The control module exports three road pwm signals and controls three road DC-DC constant-current driven modules to make the DC-DC permanent respectively
Flow drive module adjustment output constant current value；
The interface module is connected with the control module, refers to for accessing intelligent illuminating system and receiving outside control
Order, the pwm signal that the control module according to external control instruction exports three road different proportions dim toning so as to realize.
Preferably, the DC-DC constant-current driven modules include the first chip U1, first resistor R1, second resistance R2, first
Electric capacity C1, the second electric capacity C2, the first inductance L1 and the first voltage-stabiliser tube Z1, wherein, the first chip U1 is controlled using integrated LED
Chip NCL30160；The negative terminal of the first voltage-stabiliser tube Z1 is connected with direct current DC input DC+ ends, the first voltage-stabiliser tube Z1's
Anode is connected with one end of the first inductance L1 and the 8th pin of the first chip U1, and the first inductance L1's is another
One end is connected with LED light source；The 7th pin of the first chip U1 is connected with one end of the second electric capacity C2；It is described
First chip U1 the 6th pin is connected with the PWM control terminals of the control module；The 5th pin of the first chip U1
It is connected with one end of the second resistance R2, the 4th pin of the other end of the second resistance R2 and the first chip U1
It is connected with one end of the first electric capacity C1, it is the other end of the first electric capacity C1, one end of the first resistor R1, described
First chip U1 the 3rd pin, the other end of the second electric capacity C2 are connected with GND ground terminals jointly；The first resistor R1
The other end be connected with the first pin and second pin of the first chip U1.
Preferably, the control module uses Microchip single-chip microcomputers PIC12F1572.
Preferably, the interface module uses serial port.
Compared with prior art, using the technical solution of the utility model, because DC-DC constant-current driven modules are using collection
Into LED chip NCL30160, it is only necessary to which seldom peripheral components are just embodied as LED light source and provide constant current, enormously simplify electricity
Line structure reduces the volume of LED drive circuit simultaneously；The pwm signal of three tunnel independences is produced using PIC12F1572 single-chip microcomputers simultaneously
The RGB-LED of three tunnel independences is driven to go here and there, so as to easily realize light modulation toning.
Brief description of the drawings
Fig. 1 is the structured flowchart of the tunable optical color-adjustable RGB-LED lamps of the utility model direct current supply.
Fig. 2 is the circuit theory diagrams of DC-DC constant-current driven modules in the utility model.
Specific examples below will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Embodiment
Technical scheme provided by the utility model is described further below with reference to accompanying drawing.
Referring to Fig. 1, the structured flowchart of the tunable optical color-adjustable RGB-LED lamps of the utility model direct current supply is shown, is wrapped
The DC-DC constant-current driven modules that control module, interface module and three tunnels independently export are included, wherein, three road DC-DC constant currents driving moulds
Block is connected with direct current DC inputs, and output constant current driving R-LED strings, G-LED strings and B-LED strings, R-LED go here and there for sending out respectively
Go out feux rouges；G-LED goes here and there for sending green glow；B-LED goes here and there for sending blue light；
Control module exports three road pwm signals and controls three road DC-DC constant-current driven modules DC-DC constant currents is driven mould respectively
Block adjusts output constant current value；
Interface module is connected with control module, for accessing intelligent illuminating system and receiving external control instruction, according to
The pwm signal that external control instruction control module exports three road different proportions dims toning so as to realize.
Using above-mentioned technical proposal, three tunnels DC-DC constant-current driven modules in parallel are used for the string RGB of driving three LED respectively
String, and can realize single PWM brightness adjustment controls per paths of LEDs string.Pwm signal comes from control module, external control instruction
Control module is sent to by interface module, control module will update PWM parameters according to control information, and change PWM duty cycle, from
And brightness of the regulation per paths of LEDs string is realized, due to being unable to the LED strip of colour temperature, the regulation of different LED strip brightness using the tunnels of RGB tri-
The regulation of colour temperature can be realized again.
In a preferred embodiment, control module uses Microchip single-chip microcomputer PIC12F1572,
PIC12F1572 is a microcontroller with 16 simulation PWM functions, when this microcontroller has independent with three
Zhong Yuan 16 PWM controllers of high-resolution, this microcontroller has independent core peripheral hardware complementation waveform generator, enhanced
Universal synchronous or asynchronous receiver (EUSART) and analog-digital converter (ADC).The closed loop feedback control that can be used under more application scenarios
System and communication.The utility model is realized serial communication and is realized that LED light modulation is mixed colours using three road PWM using EUSART.
Referring to Fig. 2, the circuit theory diagrams of DC-DC constant-current driven modules in the utility model, DC-DC constant currents driving are shown
Module further comprises the first chip U1, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, the first inductance
L1 and the first voltage-stabiliser tube Z1, wherein, the first chip U1 uses integrated LED control chip NCL30160；First voltage-stabiliser tube Z1's is negative
End is connected with direct current DC input DC+ ends, the first voltage-stabiliser tube Z1 anode and the first inductance L1 one end and the first chip U1
8th pin is connected, and the first inductance L1 other end is connected with LED light source；First chip U1 the 7th pin and the second electricity
The one end for holding C2 is connected；First chip U1 the 6th pin is connected with the PWM control terminals of control module；First chip U1's
5th pin is connected with second resistance R2 one end, the second resistance R2 other end and the first chip U1 the 4th pin and
One electric capacity C1 one end is connected, and the first electric capacity C1 other end, first resistor R1 one end, the 3rd of the first chip U1 the draw
Pin, the second electric capacity C2 other end are connected with GND ground terminals jointly；The first of the first resistor R1 other end and the first chip U1
Pin is connected with second pin.
In the utility model, DC-DC constant-current driven modules are realized using integrated LED control chip NCL30160.
NCL30160 is a switching regulator for integrated LED, is carried so as to only need seldom peripheral components to be just embodied as LED light source
For constant current, it enormously simplify circuit structure while reduce the volume of LED drive circuit.NCL30160 is internally integrated only 55 millis
MOSFET inside the low conduction impedance in Europe (m Ω), the high switching frequency of 1.4 megahertzs of highest (MHz) make designer to use
Smaller outer member, help to minimize circuit board size and cost minimizes.NCL30160 supports input voltage model
Enclose has the input pin for being exclusively used in PWM light modulations for 6.3V to 40V, this control chip, it is possible to achieve the PWM light modulations of wide scope.
Chip has the input pin of resistance programming adjustment constant current size.With short-circuit protection, under-voltage protection and overtemperature protection shutdown etc. are protected
Protective function.And its peripheral circuit and its simple, it is only necessary to a small amount of several part cans driving LED light source, maximum output
Electric current is 1A.
Fig. 2 is the complete circuit schematic diagram using NCL30160 chip drives LED light sources.1,2 pin CS is that current sense is anti-
Feed pin, flow through the size of current of LED light source between CS pin and ground to set by connecting a resistance R1.NCL30160 is electricity
Stream mode control, when internal FET is turned on, electric current passes through inductance and LED light source and FET from input, then arrives ground.Work as FET
During shut-off, electric current is continuously through inductance and LED and diode.Output current control circuit is setting by CS comparator thresholds
Put and provide 10% ripple current to realize.Peak point current comparator threshold is 220mV, is arranged to higher than average electric current
10%, and the threshold value of valley point current comparator is 180mV, is arranged to lower than average 10%.When FET is turned on, in inductance
Electric current is risen by oblique wave.This electric current is detected by the non-essential resistance R1 between CS pin and ground.When the voltage of CS pin reaches
During 220mV, peak point current comparator is by switch-off power FET.One traditional hysteresis controller continues to monitor load current, and
When load current, which reduces, reaches 180mV until CS voltages, valley comparator is open-minded by FET.But when the fet is off, electric current
Information can not obtain, therefore set the suitable FET turn-off times, and go to adjust by correction signal when FET is turned on herein
Turn-off time is necessary.Short-circuit protection is also to be realized by CS comparators, the threshold for the CS comparators of short-circuit protection
It is worth for 500mV, i.e. the 2.5 of average electric current times.It is more than normal export average electric current 2.5 times when CS pin detect short circuit current
When, the CS comparators for short-circuit protection will turn off FET.Play the function of short-circuit protection.
The ROT pin of NCL30160 chips are off time setting resistance and connect pin.Outer meeting resistance be connected to ROT pin and
The turn-off time of hysteresis controller is set between VCC pin.And in follow-up switch periods, when FET is turned on, CS pin detect
Voltage, and when the fet is off, the amplitude adjuster threshold value according to CS voltage changes.
The DIM/EN pin of NCL30160 chips are PWM brightness adjustment controls or enabled pin.Connection one is logically high low level
Pwm signal enables or closed power MOSFET and LED light source electric current to this pin.Make output current normal value and with
It is lower to be changed according to dutycycle.So as to realize the regulation to LED luminance.PWM frequency necessarily be greater than more than 100Hz, otherwise LED light
Scintillation occurs in source.But PWM frequency be not easy to it is too high, it is too high that EMI can be caused serious.In a kind of preferred embodiment
In, 245Hz PWM frequency can be selected.
The LX pin of NCL30160 chips are that the drain electrode with internal power MOSEFET is connected.The first outside inductance L1 with
LX pin are connected.First inductance L1 value determined in the course of work, the slope that output current is ramped up and declined.And inductance is electric
The slope of stream determines that electric current needs the time how long from the valley of ripple to peak value when FET is turned on；And when FET ends
When, electric current needs the time how long from the peak value of ripple current to valley.Higher inductance value reduce output current rise and
The slope of decline, this causes the error between the ripple of actual output current and desired value to diminish.But the selection of inductance should make
Export the saturation current value that peak current value is no more than electric current.Inductance value becomes big, after frequency reduces, and frequency reduces,
MOSFET switching loss response can also reduce.So inductance value selection need consider, cost, volume and loss need
Ask.
The explanation of above example is only intended to help and understands method and its core concept of the present utility model.It should refer to
Go out, for those skilled in the art, can also be to this on the premise of the utility model principle is not departed from
Utility model carries out some improvement and modification, and these are improved and modification also falls into the protection domain of the utility model claims
It is interior.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (4)
- A kind of 1. tunable optical color-adjustable RGB-LED lamps of direct current supply, it is characterised in that including control module, interface module and The DC-DC constant-current driven modules that three tunnels independently export, wherein,Three road DC-DC constant-current driven modules are connected with direct current DC inputs, respectively output constant current driving R-LED strings, G-LED strings Gone here and there with B-LED, the R-LED goes here and there for sending feux rouges；The G-LED goes here and there for sending green glow；The B-LED goes here and there for sending Blue light；The control module exports three road pwm signals and controls three road DC-DC constant-current driven modules to drive the DC-DC constant currents respectively Dynamic model block adjusts output constant current value；The interface module is connected with the control module, for accessing intelligent illuminating system and receiving external control instruction, The pwm signal that the control module according to external control instruction exports three road different proportions dims toning so as to realize.
- 2. the tunable optical color-adjustable RGB-LED lamps of direct current supply according to claim 1, it is characterised in that the DC-DC Constant-current driven module includes the first chip U1, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, the first electricity Feel L1 and the first voltage-stabiliser tube Z1, wherein, the first chip U1 uses integrated LED control chip NCL30160；Described first is steady Pressure pipe Z1 negative terminal is connected with direct current DC input DC+ ends, and the anode of the first voltage-stabiliser tube Z1 is with the first inductance L1's One end is connected with the 8th pin of the first chip U1, and the other end of the first inductance L1 is connected with LED light source；Institute The 7th pin for stating the first chip U1 is connected with one end of the second electric capacity C2；The 6th pin of the first chip U1 with The PWM control terminals of the control module are connected；The 5th pin of the first chip U1 and one end of the second resistance R2 It is connected, the other end of the second resistance R2 and the 4th pin of the first chip U1 and one end of the first electric capacity C1 Be connected, the other end of the first electric capacity C1, one end of the first resistor R1, the first chip U1 the 3rd pin, The other end of the second electric capacity C2 is connected with GND ground terminals jointly；The other end of the first resistor R1 and first core Piece U1 the first pin is connected with second pin.
- 3. the tunable optical color-adjustable RGB-LED lamps of direct current supply according to claim 1 or 2, it is characterised in that the control Molding block uses Microchip single-chip microcomputers PIC12F1572.
- 4. the tunable optical color-adjustable RGB-LED lamps of direct current supply according to claim 1 or 2, it is characterised in that described to connect Mouth mold block uses serial port.
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| CN201720416434.9U CN206650895U (en) | 2017-04-19 | 2017-04-19 | A kind of tunable optical color-adjustable RGB LEDs of direct current supply |
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| CN201720416434.9U CN206650895U (en) | 2017-04-19 | 2017-04-19 | A kind of tunable optical color-adjustable RGB LEDs of direct current supply |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445772A (en) * | 2018-03-13 | 2018-08-24 | 深圳名飞远科技有限公司 | Smart bluetooth LED music lamp control systems |
| CN109640446A (en) * | 2018-12-24 | 2019-04-16 | 欧普照明股份有限公司 | A kind of IC chip, driving circuit and lamp control system |
| CN109819555A (en) * | 2019-04-10 | 2019-05-28 | 上海艾为电子技术股份有限公司 | A kind of LED drive circuit of the low EMI of once-through type high-resolution |
| CN109831854A (en) * | 2019-04-10 | 2019-05-31 | 上海艾为电子技术股份有限公司 | A kind of LED drive circuit of the low EMI of matrix type high-resolution |
| TWI796073B (en) * | 2021-12-30 | 2023-03-11 | 瑞軒科技股份有限公司 | Light-emitting diode device, operating method of the same, and display device |
-
2017
- 2017-04-19 CN CN201720416434.9U patent/CN206650895U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445772A (en) * | 2018-03-13 | 2018-08-24 | 深圳名飞远科技有限公司 | Smart bluetooth LED music lamp control systems |
| CN109640446A (en) * | 2018-12-24 | 2019-04-16 | 欧普照明股份有限公司 | A kind of IC chip, driving circuit and lamp control system |
| CN109819555A (en) * | 2019-04-10 | 2019-05-28 | 上海艾为电子技术股份有限公司 | A kind of LED drive circuit of the low EMI of once-through type high-resolution |
| CN109831854A (en) * | 2019-04-10 | 2019-05-31 | 上海艾为电子技术股份有限公司 | A kind of LED drive circuit of the low EMI of matrix type high-resolution |
| CN109831854B (en) * | 2019-04-10 | 2021-03-16 | 上海艾为电子技术股份有限公司 | Matrix type LED drive circuit with high resolution and low EMI |
| TWI796073B (en) * | 2021-12-30 | 2023-03-11 | 瑞軒科技股份有限公司 | Light-emitting diode device, operating method of the same, and display device |
| US11783785B2 (en) | 2021-12-30 | 2023-10-10 | Amtran Technology Co., Ltd. | LED device having diodes controlled by different signals, operating method of the same, and display device |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20171117 Termination date: 20180419 |