CN106851903A - The method and system that LED multi-path lamp bead drives are realized using small-power power - Google Patents
The method and system that LED multi-path lamp bead drives are realized using small-power power Download PDFInfo
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- CN106851903A CN106851903A CN201710015691.6A CN201710015691A CN106851903A CN 106851903 A CN106851903 A CN 106851903A CN 201710015691 A CN201710015691 A CN 201710015691A CN 106851903 A CN106851903 A CN 106851903A
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- lamp bead
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
Abstract
The present invention provides a kind of utilization small-power power and realizes the method and system that LED multi-path lamp bead drives, and belongs to LED field.The inventive method comprises the following steps：MCU is input into by the light modulation that interface obtains each paths of LEDs lamp bead；MCU calculates the output intensity of each paths of LEDs lamp bead, wherein, MCU chooses maximum as total brightness from the light modulation input value of each paths of LEDs lamp bead, then using the ratio of the input value of each paths of LEDs lamp bead and total brightness as the electric current of each paths of LEDs lamp bead, the output intensity ratio of voltage；Each paths of LEDs lamp bead drive module receives the output intensity from MCU than control signal, is converted to the output current and voltage strength of corresponding LED lamp bead, drives each paths of LEDs lamp bead to show.Beneficial effects of the present invention are：Can either realize that multichannel is exported simultaneously, multichannel is while the demand of mixed light；Power dissipation can be effectively reduced again, the size and caloric value of power drives is reduced, and reduce the totle drilling cost of light fixture.
Description
Technical field
Realize that LED multi-path lamp bead is driven using small-power power the present invention relates to a kind of LED field, more particularly to one kind 1.
Dynamic method, further relates to a kind of system for realizing the above method.
Background technology
LED multi-path lamp bead application is more prevalent, the lamp bead application of the type such as such as RGB or RGBW.This kind of multi-way LED lamp
Pearl, can realize the mixed light of more rich color, meet the lighting demand of different scenes, greatly expand the purposes of LED illumination.But
Power drives are also proposed requirement higher by this kind of LED multi-path lamp bead.
Existing common LED multi-path lamp bead drives and includes two kinds：One kind is to utilize small-power power, but can only be lighted simultaneously
Wherein lamp bead all the way；One kind is to utilize large power supply, can simultaneously light multichannel lamp bead.
Here small-power and high-power, for being relative lamp bead.To RGB/RGBW multichannel lamp beads, it is assumed that it is exported per road
Peak power be P, then the general power of small-power power is P, and the general power of large power supply is respectively 3*P, 4*P.
For example, the paths of LEDs lamp beads of RGB tri- of certain brand and model, can export red, green, blue coloured light respectively, per power all the way
It is 3W.For the LED lamp bead of the model, existing small-power multiple power supplies drive, and its power supply general power is 3W, in this lamp bead
On can only realize three kinds of light outputs of color of red, green, blue.And the powerful multiple power supplies for being directed to the model lamp bead drive, always
Power is 9W, and any mixed light output can be carried out on three tunnels.
Above-mentioned small-power power LED multi-path lamp bead drives, and can only simultaneously light lamp bead all the way therein, it is difficult to play many
The function of paths of LEDs lamp bead, cannot also blend colorful output light.If lighting multichannel lamp bead simultaneously power supply may be caused defeated
To go out damaged more than rated power or even occur the danger such as on fire.And the LED multi-path lamp bead of large power supply drives, although can
Accomplish that multichannel is exported and mixing light simultaneously, but also result in that power dissipation, high expensive, size are bigger than normal and radiating difficulty etc. is asked
Topic, the pass because cost, size and caloric value that LED power drives all are directly proportional to general power.
The content of the invention
To solve the problems of the prior art, the present invention provides one kind and realizes that LED multi-path lamp bead is driven using small-power power
Dynamic method, also provides a kind of system for realizing the above method.
The present invention realizes that the method that LED multi-path lamp bead drives comprises the following steps using small-power power：
S1：MCU is input into by the light modulation that interface obtains each paths of LEDs lamp bead, wherein, the span of the light modulation input value
It is 0~255；
S2：MCU calculates the output intensity of each paths of LEDs lamp bead, wherein, MCU is selected from the light modulation input value of each paths of LEDs lamp bead
Maximum is taken as total brightness, then using the ratio of the input value of each paths of LEDs lamp bead and total brightness as each paths of LEDs lamp bead electricity
Stream or voltage output intensity ratio, the output intensity than value be 0~1；
S3：Each paths of LEDs lamp bead drive module receives the output intensity from MCU than control signal, is converted to corresponding LED
The output current or voltage strength of pearl, drive each paths of LEDs lamp bead to show.
The present invention is further improved, and the LED multi-path lamp bead includes the street lamp pearls of RGB tri- and the street lamp pearls of RGBW tetra-.
The present invention is further improved, when the LED multi-path lamp bead is tri- street lamp pearls of RGB, in step S1, and the light modulation
Input value is respectively R, G, B value.
In step s 2, the computational methods are：
S21：Calculate total brightness H：The maximum of R, G, B value is taken as total brightness H, i.e. H=max (R, G, B)；
S22：Three tunnel output intensities R', G', B' are calculated, computing formula is：R'=R/H, G'=G/H, B'=B/H.
The present invention is further improved, when the LED multi-path lamp bead is tetra- street lamp pearls of RGBW, in step S1, and the tune
Light input value is respectively R, G, B value.
In step s 2, the computational methods are：
S21：Calculate white light value W：Take R, G, B it is worthwhile in minimum value as white light value W, i.e. W=min (R, G, B)；
S22：White light value W is subtracted from R, G, B value, obtains removing R1, G1, B1 value of white light value, R1, G1, B1 value
Respectively：R1=R-W, G1=G-W, B1=B-W；
S23：Calculate total brightness H：The maximum of R, G, B, W value is taken as total brightness H, i.e. H=max (R, G, B, W)；
S24：Four tunnel output intensity R', G', B', W' are calculated, computing formula is：R'=R1/H, G'=G1/H, B'=B1/
H, W'=W/H.
The present invention also provides a kind of system for realizing the above method, including power supply, MCU, LED multi-path lamp bead drive module and
The LED lamp bead being connected with every paths of LEDs lamp bead drive module, the MCU respectively with power supply and LED multi-path lamp bead drive module phase
Even, the MCU includes input block：Light modulation for being obtained each paths of LEDs lamp bead by interface is input into, wherein, the light modulation is defeated
The span for entering value is 0~255；Computing unit：Output intensity for calculating each paths of LEDs lamp bead, wherein, it is described to calculate single
Unit chooses maximum as total brightness from the light modulation input value of each paths of LEDs lamp bead, then by the input value of each paths of LEDs lamp bead with
The ratio of total brightness as the curtage of each paths of LEDs lamp bead output intensity ratio, the output intensity than value for 0~
1；Output unit：For by output intensity than control signal be respectively outputted to corresponding LED lamp bead drive module.
The present invention is further improved, and the LED multi-path lamp bead includes the street lamp pearls of RGB tri- and the street lamp pearls of RGBW tetra-, input
The light modulation input value obtained in unit is R, G, B value of three street lamp pearls or R, G, B value of four street lamp pearls.
The present invention is further improved, and when the LED multi-path lamp bead is tri- street lamp pearls of RGB, the LED lamp bead drives mould
Block includes driving the R roads driver element of R street lamp pearls, drives the G roads driver element of G street lamp pearls and drive the B roads of B street lamp pearls to drive
Unit.
The present invention is further improved, and when the LED multi-path lamp bead is tetra- street lamp pearls of RGBW, the LED lamp bead drives
Module includes driving the R roads driver element of R street lamp pearls, drives the G roads driver element of G street lamp pearls, drives the B roads of B street lamp pearls to drive
Moving cell and the W roads driver element of driving W street lamp pearls.
Compared with prior art, the beneficial effects of the invention are as follows：Can either realize that multichannel is exported simultaneously, multichannel is while mixed light
Demand, meet the demand of all kinds of light scenes；Power dissipation can be effectively reduced again, reduce size and the heating of power drives
Amount, reduces the totle drilling cost of light fixture, the miniaturization of light fixture is realized, the need for meeting different installation.
Brief description of the drawings
Fig. 1 is the inventive method flow chart；
Fig. 2 is the system structure diagram of the embodiment of the present invention one；
Fig. 3 is the MCU computational methods flow charts of embodiment one；
Fig. 4 is embodiment of the present invention two system structural representation；
Fig. 5 is the MCU computational methods flow charts of embodiment two.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
The present invention controls the brightness of lamp bead by rational method so that the gross output of all lamp beads is no more than
The rated power of small-power power, while the light luminance and color of output can substantially coincide with the target requirement of user, from
And power dissipation is reduced, and the size and caloric value of power drives are reduced, the totle drilling cost of light fixture is reduced, to realize the small-sized of light fixture
Change, the need for meeting different installation.
As shown in figure 1, the present invention realizes that the method that LED multi-path lamp bead drives comprises the following steps using small-power power：
S1：MCU is input into by the light modulation that interface obtains each paths of LEDs lamp bead, wherein, the span of the light modulation input value
It is 0~255；
S2：MCU calculates the output intensity of each paths of LEDs lamp bead, wherein, MCU is selected from the light modulation input value of each paths of LEDs lamp bead
Maximum is taken as total brightness, then using the ratio of the input value of each paths of LEDs lamp bead and total brightness as each paths of LEDs lamp bead electricity
Stream or voltage output intensity ratio, the output intensity than value be 0~1, that is to say, that the output intensity ratio be electric current
Or voltage, relative to maximum output current, the percentage of voltage, the percentage minimum 0% is 100% to the maximum.
S3：Each paths of LEDs lamp bead drive module receives the output intensity from MCU than control signal, is converted to corresponding LED
The output current or voltage strength of pearl, drive each paths of LEDs lamp bead to show.Percentage in step S2 is driven by being sent to LED lamp bead
After module, by the intensity that LED lamp bead drive module circuit conversion is corresponding curtage.LED lamp bead drive module circuit
According to circuit design requirements determine be control electric current size, or control voltage size.
This example LED multi-path lamp bead includes the street lamp pearls of RGB tri- and the street lamp pearls of RGBW tetra-.Using the method for the present invention so that this
The power sum of each road power drives of invention is not more than rated power, while waste so as to efficiently reduce power,
Realize each street lamp pearl mixing various colorful lights of output.
Correspond, the present invention realize the above method system include power supply, MCU, LED multi-path lamp bead drive module and
The LED lamp bead being connected with every paths of LEDs lamp bead drive module, the MCU respectively with power supply and LED multi-path lamp bead drive module phase
Connect, wherein, the MCU includes input block：Light modulation for being obtained each paths of LEDs lamp bead by interface is input into, wherein, the tune
The span of light input value is 0~255；Computing unit：Output intensity for calculating each paths of LEDs lamp bead, wherein, the meter
Calculate unit and maximum is chosen from the light modulation input value of each paths of LEDs lamp bead as total brightness, then by the input of each paths of LEDs lamp bead
Value and the ratio of total brightness as the curtage of each paths of LEDs lamp bead output intensity ratio, the output intensity than value
It is 0~1；Output unit：For by output intensity than control signal be respectively outputted to corresponding LED lamp bead drive module.
Wherein, power module is responsible for that civil power is converted to the direct current required for MCU and Ge Lu drives；Single-chip microprocessor MCU is
Treatment control centre, is responsible for receiving RGB light modulation inputs from user, is algorithmically calculated, and each road output driving is carried out
Control, output intensity and the result of calculation on Shi Ge roads are consistent；LED lamp bead drive module, receives the control signal come from MCU
And output current/the voltage strength of LED lamp bead is converted to, drive the display of LED lamp bead.
As shown in Fig. 2 when the LED multi-path lamp bead is tri- street lamp pearls of RGB, the light modulation obtained in the input block is defeated
Enter R, G, B value that value is three street lamp pearls.The LED lamp bead drive module includes driving the R roads driver element of R street lamp pearls, drives G
The G roads driver element of street lamp pearl and the B roads driver element of driving B street lamp pearls.
As shown in figure 3, when the LED multi-path lamp bead includes tri- street lamp pearls of RGB, the processing method of the system is：
S1：Start, the input of R, G, B value is received from user；
S21：Calculate total brightness H：The maximum of R, G, B value is taken as total brightness H, i.e. H=max (R, G, B)；
S22：Three tunnel output intensities R', G', B' are calculated, computing formula is：R'=R/H, G'=G/H, B'=B/H；
S3：The output current of R roads driver element, G roads driver element and B roads driver element is respectively provided with according to R', G', B'
Or voltage strength.
It is finished, waits the input next time of user, if user has input again, circulation performs step S1-S3.
As shown in figure 4, when the LED multi-path lamp bead is tetra- street lamp pearls of RGBW, the light modulation obtained in the input block
Input value is R, G, B value.The LED lamp bead drive module includes driving the R roads driver element of R street lamp pearls, drives G street lamp pearls
The W roads driver element of G roads driver element, the B roads driver element for driving B street lamp pearls and driving W street lamp pearls.
As shown in figure 5, when the LED multi-path lamp bead is tetra- street lamp pearls of RGBW, the processing method of the system is：
S1：Start, the input of R, G, B value is received from user；
S21：Calculate white light value W：Take R, G, B it is worthwhile in minimum value as white light value W, i.e. W=min (R, G, B)；
S22：White light value W is subtracted from R, G, B value, obtains removing R1, G1, B1 value of white light value, R1, G1, B1 value
Respectively：R1=R-W, G1=G-W, B1=B-W；
S23：Calculate total brightness H：The maximum of R, G, B, W value is taken as total brightness H, i.e. H=max (R, G, B, W)；
S24：Four tunnel output intensity R', G', B', W' are calculated, computing formula is：R'=R1/H, G'=G1/H, B'=B1/
H, W'=W/H；
S3：R roads driver element, G roads driver element, B roads driver element, the driving of W roads are respectively provided with according to R', G', B', W'
The output current or voltage strength of unit.
It is finished, waits the input next time of user.
The present invention can either realize that multichannel is exported simultaneously, and multichannel is while the demand of mixed light, meets the need of all kinds of light scenes
Ask；Power dissipation can be effectively reduced again, the size and caloric value of power drives is reduced, the totle drilling cost of light fixture is reduced, and realize lamp
The miniaturization of tool, the need for meeting different installation.
The specific embodiment of the above is better embodiment of the invention, is not limited with this of the invention specific
Practical range, the scope of the present invention includes being not limited to this specific embodiment, all equal according to the equivalence changes made of the invention
Within the scope of the present invention.
Claims (10)
1. the method that LED multi-path lamp bead drives is realized using small-power power, it is characterised in that comprise the following steps：
S1：MCU is input into by the light modulation that interface obtains each paths of LEDs lamp bead, wherein, the span of the light modulation input value is 0
~255；
S2：MCU calculates the output intensity of each paths of LEDs lamp bead, wherein, MCU chooses most from the light modulation input value of each paths of LEDs lamp bead
Big value as total brightness, then using the ratio of the input value of each paths of LEDs lamp bead and total brightness as the electric current of each paths of LEDs lamp bead or
The output intensity ratio of voltage, the output intensity than value be 0~1；
S3：Each paths of LEDs lamp bead drive module receives the output intensity from MCU than control signal, is converted to corresponding LED lamp bead
Output current or voltage strength, drive each paths of LEDs lamp bead to show.
2. utilization small-power power according to claim 1 realizes the method that LED multi-path lamp bead drives, it is characterised in that：
The LED multi-path lamp bead includes the street lamp pearls of RGB tri- and the street lamp pearls of RGBW tetra-.
3. utilization small-power power according to claim 2 realizes the method that LED multi-path lamp bead drives, it is characterised in that：
When the LED multi-path lamp bead is tri- street lamp pearls of RGB, in step S1, the light modulation input value is respectively R, G, B value.
4. utilization small-power power according to claim 3 realizes the method that LED multi-path lamp bead drives, it is characterised in that：
In step s 2, the computational methods are：
S21：Calculate total brightness H：The maximum of R, G, B value is taken as total brightness H, i.e. H=max (R, G, B)；
S22：Three tunnel output intensities R', G', B' are calculated, computing formula is：
R'=R/H,
G'=G/H,
B'=B/H.
5. utilization small-power power according to claim 2 realizes the method that LED multi-path lamp bead drives, it is characterised in that：
When the LED multi-path lamp bead is tetra- street lamp pearls of RGBW, in step S1, the light modulation input value is respectively R, G, B value.
6. utilization small-power power according to claim 5 realizes the method that LED multi-path lamp bead drives, it is characterised in that：
In step s 2, the computational methods are：
S21：Calculate white light value W：Take R, G, B it is worthwhile in minimum value as white light value W, i.e. W=min (R, G, B)；
S22：White light value W is subtracted from R, G, B value, obtains removing R1, G1, B1 value of white light value, R1, G1, B1 value difference
For：
R1=R-W,
G1=G-W,
B1=B-W；
S23：Calculate total brightness H：The maximum of R, G, B, W value is taken as total brightness H, i.e. H=max (R, G, B, W)；
S24：Four tunnel output intensity R', G', B', W' are calculated, computing formula is：
R'=R1/H,
G'=G1/H,
B'=B1/H,
W'=W/H.
7. it is a kind of to realize realizing the method that LED multi-path lamp bead drives using small-power power described in claim any one of 1-6
System, including power supply, MCU, LED multi-path lamp bead drive module and the LED lamp bead that is connected with every paths of LEDs lamp bead drive module, institute
MCU is stated to be connected with power supply and LED multi-path lamp bead drive module respectively, it is characterised in that：The MCU includes input block：For
The light modulation for obtaining each paths of LEDs lamp bead by interface is input into, wherein, the span of the light modulation input value is 0~255；Calculate
Unit：Output intensity for calculating each paths of LEDs lamp bead, wherein, light modulation input value of the computing unit from each paths of LEDs lamp bead
Middle selection maximum as total brightness, then using the ratio of the input value of each paths of LEDs lamp bead and total brightness as each paths of LEDs lamp bead
Curtage output intensity ratio, the output intensity than value be 0~1；Output unit：For by output intensity ratio
Control signal be respectively outputted to corresponding LED lamp bead drive module.
8. system according to claim 7, it is characterised in that：The LED multi-path lamp bead includes the street lamp pearls of RGB tri- and RGBW
Four street lamp pearls, the light modulation input value obtained in input block is R, G, B value of three street lamp pearls or R, G, B value of four street lamp pearls.
9. system according to claim 8, it is characterised in that：When the LED multi-path lamp bead is tri- street lamp pearls of RGB, institute
Stating LED lamp bead drive module includes driving the R roads driver element of R street lamp pearls, drives the G roads driver element of G street lamp pearls and drive B
The B roads driver element of street lamp pearl.
10. system according to claim 8, it is characterised in that：When the LED multi-path lamp bead is tetra- street lamp pearls of RGBW,
The LED lamp bead drive module includes driving the R roads driver element of R street lamp pearls, drives the G roads driver element of G street lamp pearls, drives
The B roads driver element of B street lamp pearls and the W roads driver element of driving W street lamp pearls.
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| CN201710015691.6A CN106851903B (en) | 2017-01-10 | 2017-01-10 | The method and system of LED multi-path lamp bead driving are realized using small-power power |
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| CN108834267A (en) * | 2018-08-29 | 2018-11-16 | 华域视觉科技(上海)有限公司 | Flowing water taillight control circuit |
| WO2020024572A1 (en) * | 2018-08-01 | 2020-02-06 | 广州市浩洋电子股份有限公司 | Method for controlling current distribution during dimming of multiple leds |
| CN112351552A (en) * | 2019-08-07 | 2021-02-09 | 调调（北京）科技有限公司 | Lamp and control method and device thereof |
| US11425804B2 (en) | 2020-05-19 | 2022-08-23 | Asustek Computer Inc. | Color-mixing lighting control method and color-mixing lighting system using the same |
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| WO2020024572A1 (en) * | 2018-08-01 | 2020-02-06 | 广州市浩洋电子股份有限公司 | Method for controlling current distribution during dimming of multiple leds |
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| US11425804B2 (en) | 2020-05-19 | 2022-08-23 | Asustek Computer Inc. | Color-mixing lighting control method and color-mixing lighting system using the same |
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| CN106851903B (en) | 2018-10-12 |
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