CN103068112B - Method of light-emitting diode (LED) lamp smart lighting adjustment and system thereof - Google Patents

Abstract

An intelligent dimming method for LED lamps, comprising the following steps: a user uses a client application program developed on an intelligent mobile terminal to select any of the four dimming modes of RGB dimming, selected color dimming, picture color selection, and music following color matching. In one way, the client program executes the corresponding algorithm and sends the obtained control parameters to the network node through wifi, and the network node processes the data and transmits it to the control node through radio frequency communication, and then the PWM signal output by the MCU of the control node Control the LED drive circuit to adjust the light color and brightness of the LED scene light. A dimming system for realizing the intelligent dimming method of LED lamps, including intelligent mobile terminals, network nodes, control nodes, low-power DC/DC constant current output control circuits, and LED lamps. It has the advantages of realizing a more humanized and novel dimming method, and its intelligence enhances the visual effect of LED scene lights and meets the needs of intelligent applications.

Description

A method and system for intelligent dimming of LED lights

technical field

The invention relates to an LED dimming control technology, in particular to an LED lamp intelligent dimming method and system thereof.

Background technique

With the development of social economy, the demand for energy saving and low consumption has made LED lights widely popularized and applied, and the application of LED-based light sources has also increased. The application of LED intelligent lighting in smart homes and other fields has also gradually increased. . Most of the LED scene light dimming systems currently available on the market are illuminated according to a fixed color set in advance, or a color that changes according to a certain rule, and form a set of control equipment. Can not be very humane to achieve scene rendering effect.

Contents of the invention

In order to overcome the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide an intelligent dimming method for LED lamps, which makes the dimming methods more humanized and diversified, and provides comfortable and perfect visual enjoyment.

In order to overcome the shortcomings and deficiencies of the prior art, another object of the present invention is to provide a dimming system for realizing an intelligent dimming method for LED lamps.

The primary purpose of the present invention is achieved through the following technical solutions: a method and system for intelligent dimming of LED lamps, comprising the following steps:

S1 users use a smart mobile terminal to select a picture for color picking in the client application, and the client application will sample and calculate the picture to obtain the RGB values of several main colors in the picture (among them: R stands for red, G stands for green, B stands for blue);

The user can choose to use pictures to pick colors or music to follow the color matching. If you choose pictures to pick colors, go to step S2; if you choose music to follow the color matching, go to step S3;

S2 client application sends the RGB values of several colors obtained in step S1 to the network node; then proceed to step S4;

S3 maps the RGB values of several colors obtained in step S1 to HSV values by using the mapping relationship from the HSV model (wherein: H represents hue, S represents saturation, and V represents lightness) to the RGB model.

The user selects a song to follow the color matching in the client application, and the client application will sample the song in real time while the song is playing, obtain the real-time volume and spectrum data of the song, and combine it with the previously mapped The HSV value of several colors is calculated in real time to obtain the new HSV value after the fusion of music, and then the new HSV value is mapped to a new RGB value by using the mapping relationship between the RGB model and the HSV model, and sent to the network node;

The S4 network node encapsulates the received RGB control parameters into a data packet, and can communicate with multiple control nodes through the wireless radio frequency transmission protocol;

After the S5 control node receives the data packet, it adjusts the duty cycle of the PWM signal output by the processor, realizes the pulse width modulation technology, and assists in designing the DC/DC constant current output driving circuit to control the color and brightness changes of the LED lamps.

Sampling and calculating the picture described in step S1 specifically includes the following steps:

Considering the limited computing power of the smart mobile terminal, for an image of m*n size, k*k samples are taken (k<=m,n).

At the same time, the amount of calculation and storage required for counting and sorting the 256 cubic colors of the RGB model is too large, and the resolution of the human eye is limited. Therefore, it is necessary to cluster the colors, and cluster them into 512 colors, these 512 colors can represent and fully reflect the color of a picture.

After clustering the colors of the k square points of the picture, calculate and sort them, and obtain the colors with the largest number.

The calculation described in step S3 obtains the new HSV value after the fusion music, specifically comprises the following steps:

Considering that the RGB model used for LED hardware lighting does not have a good correspondence with people's perception of color, the HSV model that is more in line with people's intuitive understanding of color is used to adjust the parameters. In order to prevent the color change from being too abrupt, the H parameter in the HSV is not changed here, but the real-time collected song volume data and frequency data are mapped to the S and V parameters of the new HSV value respectively. Considering that the values of volume and frequency all change in a range near the middle value, in order to express the change of music more clearly with color, a piecewise linear mapping function is used to calculate the parameter value of the new HSV value.

The control of the color and brightness changes of the LED lamps described in step S5 specifically includes the following steps:

The control node end can be connected to multiple groups of LED lamps according to different design capacities. LED lamps use the principle of three primary colors to mix red, green and blue ultra-high brightness LEDs into white light and various colored lights. The red, green, and blue colors of each LED lamp are respectively lit by three sets of DC/DC constant current drive circuits in the same PWM mode. After parameter adjustment, the processor generates three PWM signals with different duty ratios as small The parameters of the power DC/DC constant current drive circuit, and then achieve the purpose of LED dimming, intelligently control the color and brightness changes of LED lamps.

Another object of the present invention is achieved through the following technical solutions: a dimming system for realizing an intelligent dimming method for LED lamps, including an intelligent mobile terminal, a network node, a control node, a low-power DC/DC constant current output control circuit, and an LED lamp;

The intelligent mobile terminal is a user-portable mobile terminal platform; the network node and the intelligent mobile terminal perform network interconnection communication, and as a bridge for human-computer interaction, perform wireless radio frequency communication with multiple control nodes; the control node and the network node Carry out wireless radio frequency communication, and control the low-power DC/DC constant current output control circuit; the low-power DC/DC constant current output control circuit is connected with LED lamps to drive them.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention provides a method and system for intelligent dimming of LED lamps, which is controlled by a portable mobile terminal to realize remote intelligent control, and realizes intelligent scene lighting of LEDs by using pictures to pick up colors and timbres to follow. Certain technological development value and market application potential.

(2) By proposing a new dimming method and its system, the present invention realizes the visual reproduction effect of pictures and music, makes LED lighting more humanized, and will broaden the application field of LED to a certain extent.

Description of drawings

Fig. 1 is a composition block diagram of the LED lamp intelligent dimming system of the present invention.

Fig. 2 is a flow chart of the dimming method of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example

As shown in FIG. 1 , the dimming system for intelligent LED scene lights in this embodiment includes an intelligent mobile terminal, a network node, a control node, a low-power DC/DC constant current output control circuit, and an LED lamp.

The smart mobile terminal is a portable mobile terminal platform for users; the network node is used as a transmission intermediary for information interaction between the smart mobile terminal and the control node; the control node is used to generate multiple PWM control signals at the same time, and the low-power DC/ The DC constant current output control circuit realizes the control of LED lamps by pulse width modulation technology.

The smart mobile terminal in this example needs to install the client application program, and the client application program calculates the RGB value of the color according to the user's choice, and the smart mobile terminal sends it to the network node through wifi

The network node in this embodiment is mainly composed of an MCU, a network chip and a radio frequency chip, and has strong data communication capability. As a bridge of human-computer interaction information, it conducts preliminary processing of the control parameters obtained from the intelligent terminal, and then performs wireless communication of real-time data with multiple control nodes through radio frequency.

The control node in this embodiment is mainly composed of an MCU and a wireless radio frequency chip, and obtains control parameters from the network node through wireless communication, and utilizes the powerful processing capability of the MCU to output more PWM signals at the same time.

The low-power DC/DC constant current output control circuit of this embodiment is mainly composed of a power switch tube and a driver chip, and uses the PWM signals with different duty ratios driven by the driver chip to control the turn-on and turn-off of the power switch tube Time, and then change the voltage output to the LED lamp to realize the switching power supply control of constant current output.

The above-mentioned LED lamp intelligent dimming method includes the following steps:

The client application installed on the S1 smart mobile terminal has four dimming methods for the user to choose from, namely RGB dimming, color-selected dimming, color selection by picture, and color matching by music. If the user selects RGB dimming, proceed to step S2; if the user selects selected dimming, proceed to step S3; if the user selects picture color selection or music color matching, proceed to step S4;

S2 The user directly inputs the RGB value of the color, and the client application program will send the RGB value to the network node, and then proceed to step S6;

The S3 client application program will provide the user with a standard color map. The user can click the color he wants in the color map, and the client application program will send the RGB value of the pixel point selected by the user to the network node. Then proceed to step S6;

S4 The user selects a picture for color selection in the client application program, and the client application program will sample and calculate the picture to obtain the RGB values of several main colors in the picture (wherein: R stands for red, G stands for green, B stands for blue). Specifically: for an image of m*n size, take k*k sample points (k<=m, n), and cluster the colors of the sample points, and cluster the 256 cubic colors Classify into 512 colors, count and sort the sample points according to 512 colors, and obtain the 4 colors with the largest number.

If the user selects the picture color selection in step S1, the client application program will send the acquired RGB values of the 4 colors to the network node, and then proceed to step S6; if the user selects music to follow the color matching in step S1, proceed to step S5 ;

S5 maps the RGB values of the four colors obtained in step S4 to HSV values using the mapping relationship from the HSV model (where: H represents hue, S represents saturation, and V represents lightness) to the RGB model.

The user selects a song to follow the color matching in the client application, and the client application will sample the song in real time while the song is playing, and obtain the real-time volume and spectrum data of the song.

The H parameters of the HSV values of the four colors are used as the H parameters of the new HSV value, and the real-time collected song volume data and frequency data are respectively mapped to the S and V parameters of the new HSV value using a piecewise linear mapping function:

$\mathrm{<span\; class="notranslate">\; the\; y</span>}<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; a</span>}\\ \frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; b</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; a</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; b</span>}\\ \mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; b</span>}\end{array}\right.$

Among them, x is the volume data and frequency data, a and b are the boundaries of the function segmentation, and y is the value of the S and V parameters of the new HSV value after mapping. The normalized parameters are used here, and the range is [0,1 ].

The user can adjust the values of the parameters a and b of the mapping function to adjust the mapping effect.

Use the mapping relationship from the RGB model to the HSV model to map the new HSV value to a new RGB value and send it to the network node;

After the S6 network node receives multiple RGB control parameters through the Internet, it encapsulates the data into packets according to the requirements of the wireless radio frequency communication transmission protocol, and then performs real-time data transmission with multiple control nodes;

The S7 control node adjusts the duty ratio of the output PWM signal according to the received data request. After the PWM signals with different duty ratios pass through the drive circuit, they control the turn-on and turn-off time of the power switch tube. The constant current output point Bright three primary colors red, green, blue LED, three primary color LEDs with different brightness can be mixed to achieve colorful display effect.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the embodiment, and any other changes, modifications, substitutions and combinations made without departing from the spirit and principle of the present invention , simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present invention.

Claims (3)

1. A kind of LED lamp intelligent dimming method, is characterized in that, comprises the following steps: S1. The user uses a smart mobile terminal to select a picture for color picking in the client application program. The client application program will sample and calculate the picture to obtain the RGB values of several main colors in the picture. : R stands for red, G stands for green, B stands for blue; The user can choose to use pictures to pick colors or music to follow the color matching. If you choose pictures to pick colors, go to step S2; if you choose music to follow the color matching, go to step S3; S2, the client application program sends the RGB values of several colors obtained in step S1 to the network node; then proceed to step S4; S3. Utilize the HSV model, wherein: H represents hue, S represents saturation, V represents lightness, and the RGB values of several colors obtained in step S1 are mapped to HSV values to the mapping relationship of the RGB model; The user selects a song to follow the color matching in the client application, and the client application will sample the song in real time while the song is playing, obtain the real-time volume and spectrum data of the song, and combine it with the previously mapped The HSV value of several colors is calculated in real time to obtain the new HSV value after the fusion of music, and then the new HSV value is mapped to a new RGB value by using the mapping relationship between the RGB model and the HSV model, and sent to the network node; S4. After the network node encapsulates the received RGB control parameters into a data packet, it can communicate with multiple control nodes through the wireless radio frequency transmission protocol; S5. After the control node receives the data packet, it adjusts the duty cycle of the PWM signal output by the processor, realizes the pulse width modulation technology, and assists in designing the DC/DC constant current output drive circuit to control the color and brightness changes of the LED lamps; Sampling and calculating the picture in step S1 includes the following steps: Considering the limited computing power of smart mobile terminals, for an image whose size is m times n, take k square samples, where m represents the number of rows of image pixels, n represents the number of columns of image pixels, and k represents The number of rows and columns of sampling points, while counting and sorting the 256 cubic colors of the RGB model, and clustering the colors into 512 colors; After clustering the colors of the k square points of the picture, count and sort the colors of the sample points, and obtain the color with the largest number of sample points according to the sorting results of the sample points. 2. The LED lamp intelligent dimming method according to claim 1, characterized in that the calculation in step S3 to obtain the new HSV value after fused music includes: not changing the H parameter in the HSV, but collecting the real-time The volume data and frequency data of the song are respectively mapped to the S and V parameters of the new HSV value, and a piecewise linear mapping function is used to calculate the parameter value of the new HSV value. 3. The LED lamp intelligent dimming method according to claim 1, characterized in that, controlling the color and brightness changes of the LED lamp in step S5 comprises the following steps: S1. The control node can be connected to multiple groups of LED lamps according to different design capacities. LED lamps use the principle of three primary colors to mix red, green and blue ultra-high brightness LEDs into white light and various colored lights; S2. The red, green, and blue colors of each LED lamp are respectively lit by three sets of DC/DC constant current drive circuits in the same PWM mode. After parameter adjustment, the three-way PWM signal generated by the processor is used as a low-power DC /DC constant current drive circuit parameters.