CN109661073A - A kind of pwm signal conversion method, device and its lamp brightness regulation device - Google Patents
A kind of pwm signal conversion method, device and its lamp brightness regulation device Download PDFInfo
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- H—ELECTRICITY
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Abstract
A kind of pwm signal conversion method, device and its lamp brightness regulation device provided by the invention, the pwm signal conversion method includes: the first pwm signal that receiving light controller issues, and converts the square wave of its change in duty cycle to the D/C voltage value of level height variation；Micro-control unit carries out AD sampling to D/C voltage value, obtains relevant colors gray value；Software handles D/C voltage value, controls signal according to the lamps and lanterns that relevant colors gray value generates adaptation different model lamps and lanterns.Pwm signal conversion equipment includes: the square wave processing module for executing the above method, color gray value obtains module and lamps and lanterns control signal generation module.Lamp brightness regulation device decodes the lamps and lanterns by decoder module and controls signal, the brightness of decoder module regulation lamps and lanterns described in the lamps and lanterns control signal designation.The present invention solves the problems, such as lamp controller poor compatibility, and as PWM frequency it is too low and caused by lamps and lanterns display flashing or unsmooth phenomenon, while reducing signal conversion cost.
Description
Technical field
The present invention relates to field of lamp illumination, more particularly, to a kind of pwm signal conversion method, device and its lamp brightness
Regulation device.
Background technique
Currently, bathtub producer uses the bathtub lamp controller of outsourcing, support external LED lamp, and to LED lamp into
Row regulation, but it is that output signal is commonly PWM (Pulse Width Modulation, pulse width modulation) signal, the letter
The LED lamp for supporting PWM input number can only be directly driven, the LED lamp of non-pwm signal is not supported then, bathtub factory is caused
Family limits the LED lamp type that can regulate and control when using LED lamp, poor compatibility, and producer cannot be according to itself product
Feature is flexibly handled.Simultaneously as the pwm signal that bathtub is issued with lamp controller, it is (such as low that there are the possibility of underfrequency
In 100HZ), if PWM signal frequency is too low, controlled lamps and lanterns are likely to occur flashing, slight shake or the change of great-jump-forward
Change, and the effect of soft smooth transition is not achieved, therefore, bathtub producer wants to install between lamp controller and lamps and lanterns
One simple accessory plays signal transformation, the signal that can be exported in this way according to lamps and lanterns feature itself come flexible setting.
Summary of the invention
In view of the foregoing, the present invention provides the regulations of a kind of pwm signal conversion method, device and its lamp brightness to fill
It sets, inexpensive realization signal transformation, the signal that can be exported according to lamps and lanterns feature itself come flexible setting solves lamp
Have controller to LED lamp type poor compatibility the problem of, and as former PWM frequency it is too low and caused by lamps and lanterns display flashing
Or unsmooth phenomenon.
For this purpose, the present invention provides a kind of pwm signal conversion methods, comprising:
Step 1: the first pwm signal that receiving light controller issues, is handled first pwm signal, by institute
The square wave for stating the first pwm signal change in duty cycle is converted into the D/C voltage value of level height variation；
Step 2: micro-control unit carries out AD sampling to the D/C voltage value of level height variation, relevant colors gray scale is obtained
Value；
Step 3: processing D/C voltage value, generates lamps and lanterns according to the relevant colors gray value and controls signal, the lamps and lanterns control
Signal processed is for regulating and controlling the brightness of lamps and lanterns.
Preferably, the lamps and lanterns control signal includes the second pwm signal and/or SPI signal and/or DMX512 signal.
Preferably, micro-control unit carries out AD sampling to the D/C voltage value of level height variation in second step, is corresponded to
Color gray value the step of further include:
The AD sampled value that AD is sampled is read in scanning, obtains accounting for for first pwm signal according to the AD sampled value
Empty ratio；
The product of the duty ratio of the first pwm signal according to maximum color sum of the grayscale values obtains the relevant colors ash
Angle value.
Further, the calculation formula of the relevant colors gray value are as follows:
(AD sampled value/ADmax) * maximum color gray value=relevant colors gray value, in formula: the AD sampled value
With the ADmaxRatio obtain the duty ratio of first pwm signal, the ADmaxIt is preset inside the micro-control unit
Value, the maximum color gray value be preset value.
The present invention provides a kind of pwm signal conversion equipment, turn for executing the pwm signal among the above described in any one
Method is changed, to be adapted to the brightness control of different model lamps and lanterns, comprising:
One square wave processing module, for the first pwm signal that receiving light controller issues, to first pwm signal
It is handled, converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation；
One color gray value obtains module, for carrying out AD sampling to the D/C voltage value of level height variation, obtains described
Relevant colors gray value；And
One lamps and lanterns control signal generation module, for handling D/C voltage value, generate lamp according to the relevant colors gray value
Tool control signal, to realize the brightness of regulation lamps and lanterns.
Preferably, the square wave processing module is integrating circuit module, is changed using the waveform of the integrating circuit module
Characteristic, converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation, while reducing and setting
Count cost.
Preferably, it includes the micro-control unit that the color gray value, which obtains module, and the micro-control unit is built-in with
One AD sampling module, the AD sampling module realize the AD sampling of the D/C voltage value of the level height variation, and obtain AD and adopt
Sample value, the micro control unit obtains the AD sampled value, according to the AD sampled value and ADmaxRatio obtain the first PWM
The duty ratio of signal obtains the related face to the product of the duty ratio of first pwm signal according to maximum color gray value
Color shade value.
Preferably, the lamps and lanterns control signal includes the second pwm signal and/or SPI signal and/or DMX512 signal, with
It is adapted to the lamps and lanterns of the second pwm signal and/or SPI signal and/or DMX512 signal.
The present invention also provides a kind of lamp brightness regulation devices, comprising: a lamp assembly and the connection lamp assembly
The pwm signal conversion equipment, the lamp assembly includes a decoder module and a lamps and lanterns, and the decoder module receives institute
The lamps and lanterns control signal of pwm signal conversion equipment generation is stated, and realizes the decoding of the lamps and lanterns control signal, the lamps and lanterns
Control signal is used to indicate the brightness that the decoder module regulates and controls the lamps and lanterns.
Preferably, the decoder module includes: the second pwm signal of decoding and/or SPI signal and/or DMX512 signal
Decoder, to be adapted to the lamps and lanterns of the second pwm signal and/or SPI signal and/or DMX512 signal, the lamps and lanterns control signal refers to
Show the brightness of the decoder regulation lamps and lanterns.
The utility model has the advantages that
A kind of pwm signal conversion method, device and its lamp brightness regulation device provided by the invention, wherein the PWM
Signal conversion method converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation, then
AD sampling is carried out, relevant colors gray value is obtained, last software handles D/C voltage value, is generated according to the relevant colors gray value
Lamps and lanterns control signal；The pwm signal conversion equipment, respectively by square wave processing module, color gray value obtain module and
Lamps and lanterns control the mutual cooperation of signal generation module, execute the pwm signal conversion method, obtain the lamps and lanterns of the different lamps
Control signal；The lamp brightness regulation device realizes that the lamps and lanterns control the decoding of signal by the decoder module in lamps and lanterns,
The lamps and lanterns control signal is used to indicate the brightness of the decoder module regulation lamps and lanterns.Pwm signal conversion equipment knot described above
Structure is simple, realizes that first pwm signal is converted into the lamps and lanterns control signal of adaptation different lamps, such as installs DMX512 lamps and lanterns,
Need to only the first pwm signal conversion equipment be set to converting first pwm signal to DMX512 output, similarly
SPI signal can be exported, solves the problems, such as lamp controller poor compatibility, meanwhile, it is issued for bathtub with lamp controller
Pwm signal, there are the possibility of underfrequency (as be lower than 100HZ), if PWM signal frequency is too low, controlled lamps and lanterns may go out
It now flashes, slight shake or the variation of great-jump-forward, and the effect of soft smooth transition is not achieved, therefore believe by the PWM
Number conversion equipment exports the second pwm signal, and the second pwm signal can be the change of frequency, it is also possible to be changing for brightness degree
Become.Producer can control signal according to lamps and lanterns feature itself in this way come the lamps and lanterns that flexible setting exports and the product of itself is special
Point carrys out flexible design lamps and lanterns, while square wave processing module reduces signal conversion cost using integrating circuit module.
Detailed description of the invention
Fig. 1 is the flow diagram of pwm signal conversion method in one embodiment of the invention；
Fig. 2 is the flow diagram of relevant colors gray scale acquisition methods in Fig. 1；
Fig. 3 is the schematic diagram of pwm signal transformation result in one embodiment of the invention；
Fig. 4 is the structural block diagram of pwm signal conversion equipment in one embodiment of the invention；
Fig. 5 is the structural block diagram of lamp brightness regulation device in one embodiment of the invention.
Specific embodiment
All technical and scientific terms used herein with to belong to those skilled in the art of the invention usual
The meaning of understanding is identical.Term as used herein in the specification of the present invention is intended merely to description specific embodiment
Purpose, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more relevant listed items
Any and all combinations.
Technical scheme is described further with reference to the accompanying drawings and embodiments.
Embodiment 1
Referring to Fig. 1, a kind of pwm signal conversion method that the embodiment of the present invention 1 provides, comprising:
Step S100, the first pwm signal that receiving light controller issues, handles first pwm signal, will
The square wave of the first pwm signal change in duty cycle is converted into the D/C voltage value of level height variation；
Step S200, micro-control unit (Microcontroller Unit；MCU) to the D/C voltage value of level height variation
AD sampling is carried out, relevant colors gray value is obtained；
Step S300 handles D/C voltage value, generates lamps and lanterns according to the relevant colors gray value and controls signal.
Refering to 1 and Fig. 2, the step S200 carries out AD by D/C voltage value of the micro-control unit to level height variation
The step of sampling, obtaining corresponding color gray value further include:
The AD sampled value that AD is sampled is read in step S210, scanning, obtains the first PWM according to the AD sampled value
The duty ratio of signal；
Step S220, the product of the duty ratio of the first pwm signal according to maximum color sum of the grayscale values, obtains the phase
Close color gray value.
In conjunction with Fig. 3 and Fig. 4, wherein the software of the software processing D/C voltage value middle finger can be a kind of execution write
Program, color intensity value ranges are 0 to 255, and the relevant colors gray value corresponds to the brightness size of lamps and lanterns 520, the correlation
Color gray value is bigger, and the brightness for representing lamps and lanterns 520 is bigger.Refering to Fig. 3, the lamps and lanterns control signal in the present embodiment may be used
To be the 2nd PWM (Pulse Width Modulation) signal and/or SPI (Serial Peripheral Interface)
Signal and/or DMX512 (DMX Control 512) signal, being also not limited to the above-mentioned signal enumerated certainly can also be other
Regulate and control the signal of 520 brightness of lamps and lanterns.
Refering to fig. 1 and Fig. 2, specifically it is achieved in that lamps and lanterns signal controller (can be the outsourcing of bathtub producer first
Bathtub lamp controller) generate the first pwm signal, the first pwm signal that receiving light signal controller issues, to first
Pwm signal is handled, and converts the square wave of the first pwm signal change in duty cycle to the D/C voltage of level height variation
Value；Micro-control unit carries out AD sampling, microcontroller list by D/C voltage value of the built-in AD sampling module to level height variation
AD sampled value generated above is read in member scanning, according to pre-set AD inside the AD sampled value and micro-control unitmax's
Ratio obtains the duty ratio of first pwm signal；Further according to the duty ratio of the first pwm signal described in maximum color sum of the grayscale values
Product, obtain the relevant colors gray value, the maximum color gray value is preset by writing program, value range
0 to 255；D/C voltage value is handled by setting software program again, lamps and lanterns are generated according to the relevant colors gray value and control signal,
The lamps and lanterns control signal is for regulating and controlling the brightness of lamps and lanterns 520.
Further, the calculation formula of the relevant colors gray value are as follows:
(AD sampled value/ADmax)*Lmax=L
In formula: the AD sampled value and the ADmaxRatio obtain the duty ratio of first pwm signal；ADmaxFor institute
State value (such as 512,1024 or 2048) preset inside micro-control unit, LmaxIt is to preset for maximum color gray value
Value；L is the relevant colors gray value.
Refering to fig. 1, Fig. 2, Fig. 3 and Fig. 5, in a kind of scheme of the present embodiment, the pwm signal conversion method, by institute
It states the first pwm signal and is converted to the second pwm signal, SPI signal and DMX512 signal, wherein first pwm signal includes
First red pwm signal, the first green pwm signal and the first blue pwm signal, pass through this to above-mentioned three kind of first pwm signal
Conversion method in embodiment 1 respectively corresponds the red pwm signal of generation second, the second green pwm signal and the second blue PWM letter
Number；Red SPI signal, green SPI signal and blue SPI signal；And red DMX512I signal, green DMX512 signal and
Blue DMX512I signal, those signals are respectively used to the brightness of corresponding lamps and lanterns 520.A kind of act of above-mentioned only scheme
Example explanation is certainly not limited to export the three kinds of different lamps controls of three kind of first pwm signal and corresponding output simultaneously
Signal, producer can carry out selection collocation according to product design demand, to improve the flexibility used.
Further, the first PWM signal frequency of input is low frequency or intermediate-freuqncy signal, second pwm signal of output
It can be high-frequency signal and be also possible to high the second pwm signal with the brightness degree of first pwm signal, the high frequency second
It is constant that pwm signal mainly solves the brightness in lamps and lanterns 520, and it is weaker when, lamps and lanterns are it is possible that flashing or slight
The problem of jitter phenomenon；The second pwm signal that the brightness degree changes is solved in the brightness change of lamp, and light may
There is the variation of great-jump-forward, and the effect of soft smooth transition is not achieved.
Embodiment 2
Refering to Fig. 3, Fig. 4 and Fig. 5, the embodiment of the present invention 2 provides a kind of pwm signal conversion equipment 400, for executing reality
Pwm signal conversion method described in example 1 is applied, to be adapted to the brightness control of different model lamps and lanterns 520, comprising:
One square wave processing module 410 believes the first PWM for the first pwm signal that receiving light controller issues
It number is handled, converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation；
One color gray value obtains module 420, for carrying out AD sampling to the D/C voltage value of level height variation, obtains institute
State relevant colors gray value；And
One lamps and lanterns control signal generation module 430, for handling D/C voltage value, are generated according to the relevant colors gray value
Lamps and lanterns control signal, to realize the brightness of regulation lamps and lanterns 520.
In the present embodiment, the square wave processing module 410 is integrating circuit module, utilizes the wave of the integrating circuit module
Shape variation characteristic converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation, simultaneously
Reduce design cost；It includes the micro-control unit that the color gray value, which obtains module 420, and the micro-control unit is built-in with
One AD sampling module, the AD sampling module realize the AD sampling of the D/C voltage value of the level height variation, and obtain AD and adopt
Sample value, the micro control unit obtains the AD sampled value, according to the AD sampled value and ADmaxRatio obtain the first PWM
The duty ratio of signal is obtained further according to maximum color gray value to the product of the duty ratio of first pwm signal described related
Color gray value, it is a software program module that lamps and lanterns described in the present embodiment, which control signal generation module 430, certain lamp
Tool control signal generation module 430, which can be, to be done a standalone module and is operated, and the micro-control unit can also be built in
It is interior.
Refering to Fig. 3 and Fig. 5, in the design scheme of the present embodiment, pwm signal converting means described in the first pwm signal is inputted
Setting 400 can be generated the second pwm signal and/or SPI signal and/or DMX512 signal, to be adapted to the second pwm signal and/or SPI
The lamps and lanterns 520 of signal and/or DMX512 signal.
Embodiment 3
The embodiment of the present invention 3 provides a kind of lamp brightness regulation device, applies the pwm signal of the offer of embodiment 1
The pwm signal conversion equipment 400 that conversion method and embodiment 2 provide.
Refering to Fig. 5, specifically, the lamp brightness regulation device includes: a lamp assembly 500 and the connection lamps and lanterns group
The pwm signal conversion equipment 400 of part 500, the lamp assembly 500 include a decoder module 510 and a lamps and lanterns 520,
The decoder module 510 receives the lamps and lanterns control signal that the pwm signal conversion equipment 400 generates, and realizes the lamp
The decoding of tool control signal, the lamps and lanterns control signal are used to indicate the decoder module 510 and regulate and control the bright of the lamps and lanterns 520
Degree.
Refering to Fig. 4 and Fig. 5, in the technical scheme of this embodiment, the lamps and lanterns 520 are color LED lamps and lanterns comprising
Three kinds of colors of red, green and blue, the lamp controller issue the first red pwm signal, the first green pwm signal and the first blue
Pwm signal, the pwm signal conversion equipment 400 receives above-mentioned three kind of first pwm signal, and three kind of first pwm signal is divided
It is not converted to the second pwm signal, SPI signal and DMX512 signal, realizes the brightness of the color LED lamps and lanterns.
Specifically it is achieved in that the square wave processing module 410 i.e. integrating circuit module, receiving light controller hair
Three kind of first pwm signal out, using the waveform variation characteristic of the integrating circuit module, to three kind of first pwm signal
It is handled, converts the square wave of three kind of first pwm signal change in duty cycle to the D/C voltage value of level height variation；
The color gray value obtains the AD sampling module in micro-control unit described in module 420, realizes the level
The AD sampling of the D/C voltage value of height variation, and AD sampled value is obtained, the micro control unit obtains the AD sampled value, according to institute
State AD sampled value and ADmaxRatio obtain the duty ratio of first pwm signal, according to maximum color gray value and described the
The product of the duty ratio of one pwm signal obtains the relevant colors gray value；
The lamps and lanterns control signal generation module 430, raw according to the relevant colors gray value for handling D/C voltage value
Signal is controlled at lamps and lanterns, the lamps and lanterns control signal includes the second red pwm signal, the second green pwm signal and the second blue
Pwm signal；Red SPI signal, green SPI signal and blue SPI signal；And red DMX512I signal, green DMX512 letter
Number and blue DMX512I signal, and send those signals to corresponding decoder module 510, the decoder module 510 decodes the
Two pwm signals and/or SPI signal and/or DMX512 signal, to be adapted to the second pwm signal and/or SPI signal and/or DMX512
The color LED lamps and lanterns of signal, the lamps and lanterns control the brightness of the regulation color LED lamps and lanterns of decoder described in signal designation.
Certainly above only one kind is for example, producer can carry out selection collocation according to product design demand, to improve
The flexibility used.
400 structure of pwm signal conversion equipment described above is simple, and it is different to realize that first pwm signal is converted into adaptation
The lamps and lanterns of lamps and lanterns control signal, solve the problems, such as lamp controller poor compatibility.Producer in this way can be according to lamps and lanterns spy itself
Point carrys out the lamps and lanterns control signal of flexible setting output and the products characteristics of itself carry out flexible design lamps and lanterns 520, while at square wave
Module 410 is managed using integrating circuit module, greatly reduces signal conversion cost.
Above description is only several specific embodiments of the invention, it will be appreciated by those of skill in the art that
Here it is merely illustrative, protection scope of the present invention is as defined in appended claims.Therefore with regard to the present patent application
Change on an equal basis made by the scope of the patents, still falls within the range that the present invention is covered.
Claims (10)
1. a kind of pwm signal conversion method characterized by comprising
Step 1: the first pwm signal that receiving light controller issues, handles first pwm signal, by described the
The square wave of one pwm signal change in duty cycle is converted into the D/C voltage value of level height variation；
Step 2: micro-control unit carries out AD sampling to the D/C voltage value of level height variation, relevant colors gray value is obtained；
Step 3: processing D/C voltage value, generates lamps and lanterns according to the relevant colors gray value and controls signal, the lamps and lanterns control letter
Number for regulate and control lamps and lanterns brightness.
2. pwm signal conversion method according to claim 1, which is characterized in that the lamps and lanterns control signal includes second
Pwm signal and/or SPI signal and/or DMX512 signal.
3. pwm signal conversion method according to claim 1, which is characterized in that micro-control unit is to level in second step
The step of D/C voltage value of height variation carries out AD sampling, obtains corresponding color gray value further include:
The AD sampled value that AD is sampled is read in scanning, and the duty ratio of first pwm signal is obtained according to the AD sampled value；
The product of the duty ratio of the first pwm signal according to maximum color sum of the grayscale values obtains the relevant colors gray value.
4. pwm signal conversion method according to claim 3, which is characterized in that the calculating of the relevant colors gray value
Formula are as follows: (AD sampled value/ADmax) * maximum color gray value=relevant colors gray value, in formula: the AD sampled value with
The ADmaxRatio obtain the duty ratio of first pwm signal, the ADmaxIt is preset inside the micro-control unit
Value, the maximum color gray value are preset value.
5. a kind of pwm signal conversion equipment requires pwm signal conversion method described in any one of 1-4 for perform claim,
To be adapted to the brightness control of different model lamps and lanterns characterized by comprising
One square wave processing module carries out first pwm signal for the first pwm signal that receiving light controller issues
Processing converts the square wave of the first pwm signal change in duty cycle to the D/C voltage value of level height variation；
One color gray value obtains module, for carrying out AD sampling to the D/C voltage value of level height variation, obtains the correlation
Color gray value；And
One lamps and lanterns control signal generation module, for handling D/C voltage value, generate lamps and lanterns control according to the relevant colors gray value
Signal processed, to realize the brightness of regulation lamps and lanterns.
6. pwm signal conversion equipment according to claim 5, which is characterized in that the square wave processing module is integral electricity
Road module.
7. pwm signal conversion equipment according to claim 5, which is characterized in that the color gray value obtains module packet
The micro-control unit is included, the micro-control unit is built-in with an AD sampling module, and the AD sampling module realizes the level
The AD sampling of the D/C voltage value of height variation, and AD sampled value is obtained, the micro control unit obtains the AD sampled value, according to institute
State AD sampled value and ADmaxRatio obtain the duty ratio of first pwm signal, according to maximum color gray value and described the
The product of the duty ratio of one pwm signal obtains the relevant colors gray value.
8. pwm signal conversion equipment according to claim 5, which is characterized in that the lamps and lanterns control signal includes second
Pwm signal and/or SPI signal and/or DMX512 signal.
9. a kind of lamp brightness regulation device characterized by comprising a lamp assembly and the right for connecting the lamp assembly
It is required that pwm signal conversion equipment described in 5, the lamp assembly includes a decoder module and a lamps and lanterns, and the decoder module connects
The lamps and lanterns control signal that the pwm signal conversion equipment generates is received, and realizes the decoding of the lamps and lanterns control signal, it is described
Lamps and lanterns control signal is used to indicate the brightness that the decoder module regulates and controls the lamps and lanterns.
10. lamp brightness regulation device according to claim 9, which is characterized in that the decoder module includes: decoding
The decoder of two pwm signals and/or SPI signal and/or DMX512 signal.
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| CN111181642A (en) * | 2020-02-17 | 2020-05-19 | 海信（山东）冰箱有限公司 | Refrigerator and optical signal transmission system thereof |
| CN111800923A (en) * | 2020-06-05 | 2020-10-20 | 深圳市晟瑞科技有限公司 | Light control method and device, readable storage medium and terminal equipment |
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