CN111246617A - LED controller and LED control method - Google Patents
LED controller and LED control method Download PDFInfo
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- CN111246617A CN111246617A CN202010074568.3A CN202010074568A CN111246617A CN 111246617 A CN111246617 A CN 111246617A CN 202010074568 A CN202010074568 A CN 202010074568A CN 111246617 A CN111246617 A CN 111246617A
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Abstract
The invention provides an LED controller based on multi-path PWM signals and an LED control method, wherein the LED controller comprises a signal receiving and generating module, a PWM adjusting signal generating module and a signal adjusting module, wherein the signal receiving and generating module is used for receiving an external device instruction and generating a PWM adjusting signal for controlling a hue LED lamp and a color LED lamp; and the signal output control module is connected with the signal receiving and generating module, receives the PWM adjusting signal, controls the interface to be communicated with the LED lamp according to the signal, and realizes multiple adjustment of the hue LED lamp and/or the color LED lamp. Through the LED controller and the LED control method provided by the embodiment of the invention, multiple adjustment of brightness, color temperature and color can be realized by a single LED controller, so that the flexibility and convenience of user operation are improved, meanwhile, a plurality of control signals are concentrated in the same controller, the compatibility problem among different panels is also overcome, the quantity of control panels is saved, and the construction cost and the management cost are reduced.
Description
Technical Field
The invention relates to the field of illumination, in particular to an LED controller and an LED control method.
Background
At present, LED lighting is becoming more and more popular. Compared with the traditional incandescent lamp and fluorescent lamp, the LED lighting has the advantages of high lighting effect, energy conservation, easiness in dimming and color mixing and the like. The general adjustable colour temperature lamps and lanterns use the lamp pearl of two kinds of different colour temperatures, and two kinds of lamp pearls are driven respectively, can realize the regulation of the whole colour temperature of lamps and lanterns in lamp pearl colour temperature range through the mixture of the different luminance of two kinds of lamp pearls, and full-color RGB lamps and lanterns then are three kinds of lamp pearls, mix through the luminance of different colour lamp pearls and can be adjusted to a certain specific colour in three kinds of lamps and lanterns colour range. Currently, the main two solutions for LED dimming are to linearly adjust the current of the LED (analog dimming) or to switch the driving current back and forth from 0 to the target current value at high frequency (digital dimming). Setting the cycle and duty cycle using Pulse Width Modulation (PWM) is the simplest way to achieve digital dimming. The principle of PWM dimming is: the external PWM signal changes the duty ratio output by the constant current source to adjust the effective value of the LED driving current, thereby realizing dimming.
However, in the conventional scheme using the PWM signal interface, the existing control panel is generally controlled in a wired manner, and the color temperature adjustable lamp or the full-color RGB lamp requires a special control panel, but different panels are incompatible, so that the same control panel can only adjust the color temperature or color independently, the color temperature and color cannot be adjusted by the same control panel, and the brightness and color temperature of the same LED lamp cannot be adjusted respectively, so that the user operation is not flexible and convenient.
Disclosure of Invention
The invention aims to solve the technical problem that one traditional LED control panel can only adjust the color temperature or color independently, and can not meet the requirement of centralized multiple adjustment of the color temperature and the color through one LED control panel, so that the use scene of the LED can not be flexibly and conveniently controlled by a user.
In order to solve the technical problem, the invention provides an LED controller based on multiple paths of PWM signals and an LED control method.
In a first aspect, the present invention provides an LED controller based on multiple PWM signals, including:
the signal receiving and generating module is configured to receive a first instruction transmitted by an external device and generate a first PWM signal for controlling the hue LED lamp to perform hue adjustment and/or a second PWM signal for controlling the color LED lamp to perform color adjustment according to the first instruction;
a signal output control module connected with the signal receiving and generating module and configured to receive the first PWM signal and control a tone interface to communicate with the tone LED lamp according to the first PWM signal, so as to adjust the tone of the tone LED lamp and/or
And receiving the second PWM signal, and controlling a color interface to be communicated with the color LED lamp according to the second PWM signal to realize color adjustment of the color LED lamp.
Optionally, the signal receiving and generating module includes a determining unit, a brightness information analyzing unit, a color temperature information analyzing unit and a color information analyzing unit;
the judging unit is configured to judge whether the first instruction contains LED brightness information, LED color temperature information and LED color information;
the brightness information analyzing unit is configured to receive the first instruction transmitted by the external device by the signal receiving and generating module when the first instruction is judged to contain the LED brightness information, analyze the LED brightness information, calculate a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relation, and generate the first PWM signal according to the brightness adjusting signal duty ratio;
the color temperature information analyzing unit is configured to receive the first instruction transmitted by the external device by the signal receiving and generating module when the first instruction is judged to contain the LED color temperature information, analyze the LED color temperature information, calculate a color temperature adjusting signal duty ratio corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relation, and generate the first PWM signal according to the color temperature adjusting signal duty ratio;
the color information analyzing unit is configured to, when it is determined that the first instruction includes LED color information, receive the first instruction sent by the external device by the signal receiving and generating module, analyze color value information of at least one to-be-adjusted color LED lamp, calculate a color value adjustment signal duty ratio corresponding to the color value information according to a preset signal duty ratio-LED color value mapping relationship, and generate the second PWM signal according to the color value adjustment signal duty ratio.
Optionally, the signal output control module includes a level adjustment unit configured to perform level adjustment on the first PWM signal to obtain a first PWM level signal, and perform color tone adjustment on the color tone LED lamp according to the first PWM level signal; and the LED lamp is also configured to carry out level adjustment on the second PWM signal to obtain a second PWM level signal, and carry out color adjustment on the color LED lamp according to the second PWM level signal.
Optionally, the preset signal duty ratio-LED brightness mapping relationship includes an initial brightness function, an accelerated brightness function, and a stable brightness function that are sequentially and continuously set;
the initial value of the LED brightness variable in the initial brightness function is zero and does not change along with the duty ratio variable of the brightness signal in the initial brightness function;
the LED brightness variable in the accelerated brightness function and the brightness signal duty ratio variable in the accelerated brightness function are changed according to a first slope;
the LED brightness variable in the stable brightness function and the brightness signal duty ratio variable in the stable brightness function change according to a second slope;
optionally, in the preset signal duty ratio-LED color temperature mapping relationship, the LED color temperature variable is directly proportional to the color temperature signal duty ratio variable;
the color temperature signal duty ratio variable comprises a first color temperature threshold value and a second color temperature threshold value;
when the color temperature signal duty ratio variable changes from zero to the first color temperature threshold value, the color temperature corresponding to the LED color temperature variable gradually changes from warm light to white light;
when the color temperature signal duty ratio variable changes from the first color temperature threshold value to the second color temperature threshold value, the color temperature corresponding to the LED color temperature variable gradually changes from white light to cold light.
Optionally, the signal receiving and generating module further includes an identification information parsing unit configured to parse identification information of the color LED lamp to be adjusted from the first instruction;
the signal output control module further comprises an adjustment control unit configured to control the color LED lamp corresponding to the identification information to perform color adjustment according to the identification information and the second PWM level signal;
the color LEDs comprise red LEDs, blue LEDs and green LEDs, and the identification information comprises at least one of first identification information corresponding to the red LEDs, second identification information corresponding to the blue LEDs and third identification information corresponding to the green LEDs.
Optionally, the controller further comprises:
the state query module is configured to receive a second instruction which is transmitted by the external device and used for querying the current state of the hue LED lamp and/or the color LED lamp, and return the current state information of the hue LED lamp and/or the color LED lamp to the external device;
the history instruction calling module is configured to receive a history calling instruction transmitted by the external equipment, query history instruction storage data according to the history calling instruction, obtain a first history instruction matched with the history calling instruction, and input the first history instruction into the signal receiving and generating module;
and the on-off control module is configured to receive a third instruction for controlling on-off transmitted by the external equipment and control the on-off type equipment to be connected or disconnected according to the third instruction.
In a second aspect, the present invention provides a method for controlling an LED, comprising:
the method comprises the steps of receiving a first instruction transmitted by external equipment, generating a first PWM signal used for controlling a hue LED lamp to conduct hue adjustment according to the first instruction, controlling a hue interface to be communicated with the hue LED lamp according to the first PWM signal to achieve hue adjustment of the hue LED lamp, and/or receiving a first instruction transmitted by the external equipment, generating a second PWM signal used for controlling a color LED lamp to conduct color adjustment according to the first instruction, controlling a color interface to be communicated with the color LED lamp according to the second PWM signal to achieve color adjustment of the color LED lamp.
Optionally, receiving a first instruction transmitted by an external device, and judging whether the first instruction contains LED brightness information, LED color temperature information, and LED color information;
when the first instruction is judged to contain LED brightness information, analyzing the first instruction to obtain the LED brightness information, calculating a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relation, and generating a first PWM signal according to the brightness adjusting signal duty ratio; carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out brightness adjustment on the hue LED lamp according to the first PWM level signal;
when the first instruction is judged to contain LED color temperature information, analyzing the first instruction to obtain the LED color temperature information, calculating a color temperature adjusting signal duty ratio corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relation, and generating a first PWM signal according to the color temperature adjusting signal duty ratio; carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out color temperature adjustment on the hue LED lamp according to the first PWM level signal;
when the first instruction is judged to contain LED color information, analyzing the first instruction to obtain identification information and color value information of at least one to-be-adjusted color LED lamp, calculating a color value adjusting signal duty ratio corresponding to the color value information according to a preset signal duty ratio-LED color value mapping relation, and generating a second PWM signal according to the color value adjusting signal duty ratio; and carrying out level adjustment on the second PWM signal to obtain a second PWM level signal, and controlling the color LED lamp corresponding to the identification information to carry out color adjustment according to the identification information and the second PWM level signal.
Optionally, receiving a second instruction for querying the current state of the hue LED lamp and/or the color LED lamp, which is transmitted by the external device, and returning the current state information of the hue LED lamp and/or the color LED lamp to the external device;
optionally, a history calling instruction transmitted by the external device is received, history instruction storage data is inquired according to the history calling instruction, a first history instruction matched with the history calling instruction is obtained, and the first history instruction is input into the signal receiving and generating module;
optionally, a third instruction for controlling on-off transmitted by the external device is received, and the on-off type device is controlled to be connected or disconnected according to the third instruction.
Compared with the prior art, the LED controller and the control method have the advantages that: can realize carrying out multiple regulation to luminance, colour temperature and color through same controller, flexibility and convenience when not only having improved user operation still overcome the compatible problem between the different panels at the same time of concentrating multiple control signal in same controller, have reduced construction cost and administrative cost when having saved control panel quantity.
In order to more fully understand the technical contents of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LED controller based on multiple PWM signals according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of the signal receiving and generating module shown in fig. 1 according to an embodiment of the present application.
Fig. 3 is a schematic connection diagram of the signal output control module shown in fig. 1 according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a preset signal duty ratio-LED brightness mapping relationship in an embodiment of the present application.
Fig. 5 is a flowchart illustrating an LED control method according to an embodiment of the present application.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The term "pulse width modulation" or "PWM" refers to a repetitive constant time interval or period with digital signal modulation, where the signal is high (digital 1) for a portion of each period and low (digital 0) for the remaining portion. The high and low part periods of the signal within the width of each are accomplished by varying the pulse width modulation.
The term "duty cycle" refers to the proportion of the duration of the high level to the total duration of the PWM signal during a complete cycle of the PWM signal, ranging from 0-100%.
The term "color value" refers to a color value that corresponds to the color in a different color mode. In the RGB color mode, the color is a mixture of red, green, and blue. The color is defined by a hexadecimal symbol consisting of red, green and blue values (RGB). The minimum value for each color is 0 (hexadecimal: # 00). The maximum value is 255 (hexadecimal: # FF).
Fig. 1 is an LED controller based on multiple PWM signals according to an embodiment of the present disclosure, which includes a signal receiving and generating module 100 and a signal output control module 200, where the signal receiving and generating module 100 receives a first instruction sent from an external device, and generates a first PWM signal for controlling a color LED lamp to perform color adjustment and/or a second PWM signal for controlling a color LED lamp to perform color adjustment according to the first instruction; and the signal output control module 200 is connected with the signal receiving and generating module 100, receives the first PWM signal, controls the color tone interface 220 to be communicated with the color tone LED lamp according to the first PWM signal, and implements color tone adjustment of the color tone LED lamp, and/or receives the second PWM signal, and controls the color interface 230 to be communicated with the color LED lamp according to the second PWM signal, thereby implementing color adjustment of the color LED lamp.
The types of the hue interface 220 and the color interface 230 are not fixed, and the hue adjustment includes one or a combination of brightness adjustment and color temperature adjustment of the hue LED lamp according to the type definition of the external LED lamp.
In the embodiment of the application, the LED controller can be simultaneously connected to a plurality of different types of LED lamps, such as color LED and hue LED lamps, after the user sends the first instruction, through the difference of the external LED types, the single LED controller can realize multiple adjustments of brightness, color temperature and color according to the first instruction of the user, such as: the simultaneous adjustment of color temperature and color, or the independent adjustment of color temperature and color, not only improve flexibility and convenience when the user operates, concentrate multiple control signal in same controller simultaneously and still overcome the compatible problem between the different panels, reduced construction cost and administrative cost when having saved control panel quantity.
Specifically, when the external connection is a hue LED lamp, the interface is defined as a hue interface 220, and the dual adjustment of brightness and color temperature can be realized by controlling the hue LED lamp through the first PWM signal; when the external connection is a color LED lamp, the interface is defined as a color interface 230, and full color gamut adjustment of colors can be realized by controlling the three color LED lamps through the second PWM signal. The first instruction transmitted by the external equipment can be a specific real-time adjusting instruction of a user to the LED lamp artificially, and can also be an adjusting instruction to the LED lamp, which is automatically triggered by the external equipment according to external environment factors or preset conditions. It should be noted that the first instruction may be an instruction to adjust the color temperature, the brightness, and the color at the same time, or may be an instruction to adjust any one or two of the color temperature, the brightness, and the color. The external equipment comprises devices with calculation and/or communication functions, such as an intelligent terminal, a sensor, a server and the like.
Fig. 2 is a schematic structural diagram of the signal receiving and generating module 100 shown in fig. 1 according to an embodiment of the present application, and includes a determining unit 110, a luminance information analyzing unit 120, a color temperature information analyzing unit 130, and a color information analyzing unit 140.
A judging unit 110 configured to judge whether the first instruction contains LED luminance information, LED color temperature information, and LED color information.
The brightness information analyzing unit 120 is configured to, when it is determined that the first instruction includes LED brightness information, receive the first instruction transmitted by the external device by the signal receiving and generating module 100, analyze the LED brightness information, calculate a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relationship, and generate a first PWM signal according to the brightness adjusting signal duty ratio.
And the color temperature information analyzing unit 130 is configured to, when it is determined that the first instruction includes LED color temperature information, receive the first instruction transmitted by the external device by the signal reception generating module 100, analyze the LED color temperature information, calculate a color temperature adjusting signal duty ratio corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relationship, and generate a first PWM signal according to the color temperature adjusting signal duty ratio.
And the color information analyzing unit 140 is configured to, when it is determined that the first instruction includes LED color information, receive the first instruction transmitted by the external device by the signal receiving and generating module 100, analyze color value information of at least one to-be-adjusted color LED lamp, calculate a color value adjusting signal duty ratio corresponding to the LED color value information according to a preset signal duty ratio-LED color value mapping relationship, and generate a second PWM signal according to the color value adjusting signal duty ratio.
Through the embodiment, the controller can realize accurate adjustment of the brightness, the color temperature and the color of the external LED lamp according to the mapping relation of different signal duty ratios.
Fig. 3 is a connection diagram of the signal output control module 200 shown in fig. 1 according to an embodiment of the present application, which includes a level adjustment unit 210.
A level adjusting unit 210 configured to perform level adjustment on the first PWM signal to obtain a first PWM level signal, and perform color tone adjustment on the color-tone LED lamp according to the first PWM level signal; and the LED lamp is also configured to carry out level adjustment on the second PWM signal to obtain a second PWM level signal, and carry out color adjustment on the color LED lamp according to the second PWM level signal.
Through the embodiment, the controller adjusts the level of the PWM signal generated by the signal receiving and generating module 100, so as to meet the specification requirement of the external LED lamp.
Specifically, the level adjustment unit 210 may include a transistor amplification circuit, and the transistor amplification circuit boosts the input PWM signal so that the voltage of the PWM level signal satisfies the operating voltage of the external LED lamp.
Fig. 4 is a schematic diagram of a preset signal duty ratio-LED brightness mapping relationship in an embodiment of the present application. The preset signal duty ratio-LED brightness mapping relation comprises an initial brightness function, an accelerated brightness function and a stable brightness function which are sequentially and continuously arranged.
The initial value of the LED brightness variable in the initial brightness function is zero and does not change along with the duty ratio variable of the brightness signal in the initial brightness function.
The LED brightness variable in the acceleration brightness function and the brightness signal duty ratio variable in the acceleration brightness function are changed according to a first slope.
The LED brightness variable in the stable brightness function and the brightness signal duty ratio variable in the stable brightness function change according to a second slope.
The LED needs to pass through three stages of an initial brightness function, an accelerated brightness function and a stable brightness function, and the first slope and the second slope are different and are determined by the light emitting characteristics of the LED.
By the implementation mode, when the signal duty ratio-LED brightness mapping relation enters a stable brightness function stage, the controller can realize stepless and accurate regulation of the brightness of the LED lamp.
Specifically, the brightness of the LED is generally expressed by the Luminous Intensity (luminance Intensity), and in the preset signal duty ratio-LED brightness mapping relationship, along with the change of the luminance signal duty ratio, the LED brightness variable (i.e., the Luminous Intensity) is firstly kept at an initial value of zero, then is rapidly increased, and then enters a steady-state increasing stage until the maximum brightness is reached.
Specifically, referring to fig. 4, in an embodiment, the preset signal duty ratio-LED luminance mapping relationship is divided into three stages according to the difference of the luminance signal duty ratio:
the duty ratio of the brightness signal is less than 5%, the level adjustment unit 210 adjusts the level of the first PWM signal to obtain a first PWM level signal, which is insufficient to light the LED lamp, and at this time, the initial brightness value of the LED is zero and does not change with the duty ratio of the brightness signal.
The duty ratio of the brightness signal reaches 5% and gradually increases to 10%, the LED is firstly lighted, then the brightness is rapidly increased according to a first increasing speed (namely the speed corresponding to the first slope) along with the variable increase of the duty ratio of the brightness signal, and when the duty ratio of the brightness signal reaches 10%, the brightness of the LED also reaches 10% of the highest brightness.
The duty ratio of the brightness signal exceeds 10% and gradually increases to 100%, the brightness of the LED is continuously improved, the brightness is stably improved according to a second increasing rate (namely the speed corresponding to a second slope) along with the increase of the duty ratio variable of the brightness signal at the stage, and when the duty ratio of the brightness signal reaches 100%, the brightness of the LED also reaches the highest brightness; the second speed increasing rate of the LED brightness in the stage is smaller than the first speed increasing rate in the previous stage, and the LED brightness and the brightness signal duty ratio are linearly related.
In an embodiment of the application, in a preset signal duty ratio-LED color temperature mapping relation, an LED color temperature variable is in direct proportion to a color temperature adjusting signal duty ratio variable; the duty ratio variable of the color temperature adjusting signal comprises a first color temperature threshold value and a second color temperature threshold value; when the duty ratio variable of the color temperature adjusting signal changes from zero to a first color temperature threshold value, the color temperature corresponding to the LED color temperature variable gradually changes from warm light to white light; when the duty ratio variable of the color temperature adjusting signal changes from the first color temperature threshold value to the second color temperature threshold value, the color temperature corresponding to the color temperature variable of the LED gradually changes from white light to cold light.
By the implementation mode, electrodeless color temperature adjustment can be carried out on the LED lamp with the same tone according to the preset signal duty ratio-LED color temperature mapping relation.
Specifically, the color temperature of the LED is defined by a K value, which is quantitatively expressed by Kelvin temperature (K), the color temperature K value has a certain corresponding relationship with the color temperature displayed by the LED, and the higher the K value is, the more the LED displays the color temperature tending to the cold light (white blue); the lower the K value, the more warm (yellow-red) the LED display tends to. In the preset signal duty ratio-LED color temperature mapping relation, the LED color temperature variable (namely K value) is in direct proportion to the color temperature adjusting signal duty ratio variable.
Specifically, the determining unit 110 in the signal receiving and generating module 100 determines that the first command includes that the LED color temperature information is warm white light (the color temperature K value is 2500K), the color temperature information analyzing unit 130 calculates the corresponding duty ratio of the color temperature adjusting signal to be 25% according to a preset signal duty ratio-LED color temperature mapping relationship, and generates the first PWM signal according to the duty ratio. The specific mapping relation of the preset signal duty ratio to the LED color temperature depends on the specification of an external LED lamp, and when the specification is changed, the corresponding color temperature adjusting signal duty ratio may be changed along with the realization of the same color temperature. For example, when the LED lamp is of the first specification, the duty ratio of the color temperature adjusting signal includes a first color temperature threshold of 50%, the corresponding color temperature K value is 5000K and a second color temperature threshold of 55%, the corresponding color temperature K value is 5500K, the duty ratio of the signal is divided into 3 sections from 0 to 100%, when the duty ratio of the color temperature adjusting signal is changed from zero to 50%, the color temperatures presented by the LED lamp are all warm lights, and the trend of gradually decreasing from the warm lights to white lights is maintained; when the duty ratio of the color temperature adjusting signal is from 50% to 55%, the color temperature presented by the LED lamp is white light, but the LED lamp has the trend of gradually weakening the white light to change into cold light; when the duty ratio of the color temperature adjusting signal exceeds 55%, the corresponding color temperature K value is also larger than 5500K, and the color temperature presented by the LED lamp is cold light and keeps the enhancement trend until the maximum value is reached.
In an embodiment of the present application, the signal receiving and generating module 100 further includes an identification information analyzing unit configured to analyze the identification information of the color LED lamp to be adjusted from the first instruction. The signal output control module 200 further includes an adjustment control unit configured to control the color LED lamp corresponding to the identification information to perform color adjustment according to the identification information and the second PWM level signal. The color LEDs comprise red LEDs, blue LEDs and green LEDs, and the identification information comprises at least one of first identification information corresponding to the red LEDs, second identification information corresponding to the blue LEDs and third identification information corresponding to the green LEDs.
Through this kind of embodiment, the controller can be according to the regulation demand to color LED in the user's instruction, and nimble the color development of adjusting different color LED is more nimble in color control, has realized the color regulation of full gamut through the combination of the color value of RGB three-colour LED lamp color development simultaneously.
Specifically, the identification information is for identifying the LED lamps with different colors, so that the adjustment control unit of the signal output control module 200 is facilitated to control the color LED lamp corresponding to the identification information to perform color adjustment according to the identification information and the second PWM level signal. The color LED lamp can be a colored lamp bead with a color, the second PWM signal generation instruction indirectly enhances the color of the color LED lamp by improving the brightness of the color LED lamp, wherein the brightness of the color LED lamp is in direct proportion to the duty ratio of the PWM color signal, so that in this case, the color adjustment is substantially realized by adjusting the duty ratio of the second PWM signal to change the brightness of the connected color LED lamp, and the RGB three-color lamp achieves the color corresponding to the color adjustment requirement through independent color development or mixed color development. The specific mapping relation of the preset signal duty ratio and the LED color value depends on the specification of an external color LED lamp.
Specifically, in one embodiment, when the determining unit 110 in the signal receiving and generating module 100 determines that the first command includes LED color information, the color information analyzing unit 140 analyzes the color information to obtain "calomel," the identification information analyzing unit calculates the hexadecimal color values according to the hexadecimal color value corresponding to the color-color value matching table as # FA78BE (the "calomel" referred to herein may BE defined by the control device according to the external color LED lighting specification and the color-color value matching table, or may BE user-defined, and should not BE limited to an absolute literal meaning), and calculates the hexadecimal color values to obtain the hexadecimal color values corresponding to the RGB three-color LED as # FA0000 (red color value LED), #007800 (green LED color value), #0000 (blue LED color value BE), and the color information analyzing unit 140 calculates the color value corresponding to the LED color value information according to the preset signal duty ratio-LED color value mapping relationship And (3) saving the duty ratio of the signal, wherein the duty ratio corresponding to the red LED color value of # FA0000 is 98%, the duty ratio of green is 31%, and the duty ratio of blue is 75%, and then generating a second PWM signal according to the duty ratio of the color value adjusting signal. The level adjustment unit 210 in the signal output control module 200 performs level adjustment on the second PWM signal to obtain a second PWM level signal, and the adjustment control unit in the signal output control module 200 controls the three color LED lamps to perform color development according to the three identification information of the three color LED lamps and the second PWM level signal.
Specifically, in another embodiment, when the determining unit 110 in the signal receiving and generating module 100 determines that the first command includes LED color information, the color information analyzing unit 140 analyzes the color information to obtain "standard red", the identification information analyzing unit analyzes a hexadecimal color value corresponding to the color-color value matching table to be # FF0000, the color information analyzing unit 140 calculates a duty ratio of a color value adjusting signal corresponding to the red LED to be 98% according to a preset signal duty ratio-LED color value mapping relationship, a green duty ratio is 0, a blue duty ratio is 0, and the signal output control module 200 finally controls the red LED lamp to perform individual color rendering and controls the green LED and the blue LED to be extinguished and not to perform color rendering.
Specifically, in another embodiment, a single controller can provide 8 PWM signal outputs in total, and the external device stores the LED interface information specific to 8 interfaces of the signal output control module 200, that is, the external LED type information. The 1 st-2 interface is connected with the first color modulation LED lamp, the 3 rd-4 th interface is connected with the second color modulation LED lamp, the 5 th-7 th interface is connected with the first color LED lamp, and the 8 th interface is used as a standby interface and is temporarily vacant. When the determining unit 110 in the signal receiving and generating module 100 determines that the first instruction includes all 2 sets of LED hue information and 1 set of LED color information, the 2 sets of LED hue information are detailed that the 2 sets of hue LED brightness are all 80%, the color temperatures are respectively the first hue LED warm-up white light (the color temperature K value is 2500K), the second hue LED cold-white light (the color temperature K value is 7500K), and the 1 set of LED color information is detailed that the first color LED color is "hot pink", and meanwhile the determining unit 110 analyzes the specific LED interface information of 8 interfaces of the signal output control module 200 included in the first instruction.
According to 2 groups of LED hue information, the brightness information analysis unit 120 generates a first brightness adjustment signal and a second brightness adjustment signal with a duty ratio of 80%, the color temperature information analysis unit 130 generates a first color temperature adjustment signal with a duty ratio of 25% (warm white light) and a second color temperature adjustment signal with a duty ratio of 75% (cold white light), the level adjustment unit 210 of the signal output control module 200 generates a corresponding first PWM level signal according to a first PWM signal composed of four paths of duty ratio PWM signals, and the adjustment control unit controls the first color LED lamp and the second color LED lamp to display corresponding brightness and color temperature respectively according to LED interface information and the first PWM level signal.
According to the 1 group of LED color information, the color information analyzing unit 140 and the identification information analyzing unit further calculate and generate a second PWM signal composed of three PWM signals with duty ratios of 98%, 31% and 75% and identification information of a first color LED lamp to be adjusted, the level adjusting unit generates a second PWM level signal according to the second PWM signal, and the adjusting control unit controls the corresponding three-color LED lamp to display color according to the LED interface information, the identification information and the second PWM level signal.
In an embodiment of the application, the controller further includes a status query module configured to receive a second instruction for querying a current status of the hue LED lamp and/or the color LED lamp, which is transmitted by the external device, and return current status information of the hue LED lamp and/or the color LED lamp to the external device.
The controller further comprises a history instruction calling module configured to receive a history calling instruction transmitted by the external device, query history instruction storage data according to the history calling instruction, obtain a first history instruction matched with the history calling instruction, and input the first history instruction into the signal receiving and generating module 100.
The controller also comprises an on-off control module which is configured to receive a third instruction for controlling on-off transmitted by the external equipment and control the on-off type equipment to be connected or disconnected according to the third instruction.
Specifically, when a user wants to use an intelligent terminal such as a mobile phone to display the color of the LED lamp connected to the current controller, a state query instruction is transmitted through an external device to query the current state of the hue LED lamp and/or the color LED lamp, the state query module communicates with the adjustment control unit of the signal output control module 200, and after the current state information of the external LED lamp is obtained, the state information is returned to the external device, so that the effect of remotely monitoring the LED lamp can be realized.
Specifically, when a user wants to quickly reproduce the color rendering state of the LED lamp connected to the current controller in the previous instruction adjustment through an intelligent terminal such as a mobile phone, a history call instruction is transmitted through an external device, where the history call instruction includes, but is not limited to, specific time (period) and LED lamp identification information, the history instruction call module queries history instruction storage data according to the history call instruction to obtain a first history instruction matched with the history call instruction, and inputs the first history instruction into the signal receiving and generating module 100 for regenerating a PWM signal corresponding to the matched first history instruction, so as to control the LED lamp connected to the current controller to reproduce the color rendering state corresponding to the previous first history instruction.
Specifically, the on-off control module may include a relay control circuit and a relay, wherein after the relay control circuit receives a switching instruction of the simple on-off device from the external device, the relay connected to the relay control circuit generates a corresponding level control signal to perform on-off adjustment on the external lamp corresponding to the identification information, and the switching instruction includes specific identification information of the device to be controlled. The simple on-off type equipment which only needs to be adjusted by turning on and off is controlled through the implementation mode, partial cost is saved, and diversified dimming requirements of users are met.
Corresponding to the LED controller provided in the embodiments of the present application, an embodiment of the present invention further provides an LED control method based on multiple PWM signals.
Fig. 5 is a schematic flowchart of an LED control method in an embodiment of the present application, which specifically includes the following steps.
S100: receiving a first instruction transmitted by an external device.
S200: and generating a first PWM signal for controlling the color LED lamp to perform color adjustment and a second PWM signal for controlling the color LED lamp to perform color adjustment according to the first instruction.
S300: controlling the tone interface 220 to be communicated with the tone LED lamp according to the first PWM signal to realize tone adjustment of the tone LED lamp; and controlling the color interface 230 to be communicated with the color LED lamp according to the second PWM signal, so as to realize color adjustment of the color LED lamp.
By the LED control method provided by the embodiment of the invention, under the condition that the types of the externally connected LEDs are different, multiple adjustment of brightness, color temperature and color by controlling a single LED controller through the first instruction can be realized, the flexibility and convenience of user operation are improved, meanwhile, the compatibility problem among different panels is also solved by concentrating various control signals in the same controller, the quantity of the control panels is saved, and the construction cost and the management cost are reduced.
In one specific embodiment, the LED control method further includes receiving a first instruction transmitted from an external device, and determining whether the first instruction includes LED brightness information, LED color temperature information, and LED color information.
When the first instruction is judged to contain LED brightness information, analyzing the first instruction to obtain the LED brightness information, calculating a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relation, and generating a first PWM signal according to the brightness adjusting signal duty ratio; and carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out brightness adjustment on the hue LED lamp according to the first PWM level signal.
When the first instruction is judged to contain the LED color temperature information, analyzing the first instruction to obtain the LED color temperature information, calculating the duty ratio of a color temperature adjusting signal corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relation, and generating a first PWM signal according to the duty ratio of the color temperature adjusting signal; and carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out color temperature adjustment on the hue LED lamp according to the first PWM level signal.
When the first instruction is judged to contain the LED color information, analyzing the first instruction to obtain the identification information and the color value information of at least one to-be-adjusted color LED lamp, calculating the color value adjusting signal duty ratio corresponding to the LED color value information according to a preset signal duty ratio-LED color value mapping relation, and generating a second PWM signal according to the color value adjusting signal duty ratio; and carrying out level adjustment on the second PWM signal to obtain a second PWM level signal, and controlling the color LED lamp corresponding to the identification information to carry out color adjustment according to the identification information and the second PWM level signal.
In one specific embodiment, the LED control method further comprises the step of receiving a second instruction for inquiring the current state of the hue LED lamp and/or the color LED lamp, which is transmitted by the external device, and returning the current state information of the hue LED lamp and/or the color LED lamp to the external device.
The method comprises the steps of receiving a historical calling instruction transmitted by external equipment, inquiring historical instruction storage data according to the historical calling instruction to obtain a first historical instruction matched with the historical calling instruction, and inputting the first historical instruction into a signal receiving and generating module.
And receiving a third instruction for controlling on-off transmitted by the external equipment, and controlling the on-off type equipment to be connected or disconnected according to the third instruction.
The embodiment of the invention also provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program realizes the LED control method in any one of the above method embodiments.
An embodiment of the present invention further provides an electronic device, where the electronic device includes at least one processor (processor), a communication Interface (Communications Interface), a memory (memory array), and a bus. The processor, the communication interface and the memory are communicated with each other through the bus, and the instructions stored in the memory can be executed by the processor through the communication interface, so that the processor can execute the LED control method in any one of the above method embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the modifications or alternative embodiments within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An LED controller, comprising:
the signal receiving and generating module is configured to receive a first instruction transmitted by an external device and generate a first PWM signal for controlling the hue LED lamp to perform hue adjustment and/or a second PWM signal for controlling the color LED lamp to perform color adjustment according to the first instruction;
a signal output control module connected with the signal receiving and generating module and configured to receive the first PWM signal and control a tone interface to communicate with the tone LED lamp according to the first PWM signal, so as to adjust the tone of the tone LED lamp and/or
And receiving the second PWM signal, and controlling a color interface to be communicated with the color LED lamp according to the second PWM signal to realize color adjustment of the color LED lamp.
2. The controller of claim 1, wherein:
the signal receiving and generating module comprises a judging unit, a brightness information analyzing unit, a color temperature information analyzing unit and a color information analyzing unit;
the judging unit is configured to judge whether the first instruction contains LED brightness information, LED color temperature information and LED color information;
the brightness information analyzing unit is configured to receive the first instruction transmitted by the external device by the signal receiving and generating module when the first instruction is judged to contain the LED brightness information, analyze the LED brightness information, calculate a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relation, and generate the first PWM signal according to the brightness adjusting signal duty ratio;
the color temperature information analyzing unit is configured to receive the first instruction transmitted by the external device by the signal receiving and generating module when the first instruction is judged to contain the LED color temperature information, analyze the LED color temperature information, calculate a color temperature adjusting signal duty ratio corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relation, and generate the first PWM signal according to the color temperature adjusting signal duty ratio;
the color information analyzing unit is configured to, when it is determined that the first instruction includes LED color information, receive the first instruction sent by the external device by the signal receiving and generating module, analyze color value information of at least one to-be-adjusted color LED lamp, calculate a color value adjustment signal duty ratio corresponding to the color value information according to a preset signal duty ratio-LED color value mapping relationship, and generate the second PWM signal according to the color value adjustment signal duty ratio.
3. The controller according to claim 1 or 2, wherein:
the signal output control module comprises a level adjusting unit, a level adjusting unit and a control unit, wherein the level adjusting unit is configured to perform level adjustment on the first PWM signal to obtain a first PWM level signal, and perform tone adjustment on the tone LED lamp according to the first PWM level signal; and the LED lamp is also configured to carry out level adjustment on the second PWM signal to obtain a second PWM level signal, and carry out color adjustment on the color LED lamp according to the second PWM level signal.
4. The controller of claim 2, wherein:
the preset signal duty ratio-LED brightness mapping relation comprises an initial brightness function, an accelerated brightness function and a stable brightness function which are sequentially and continuously arranged;
the initial value of the LED brightness variable in the initial brightness function is zero and does not change along with the duty ratio variable of the brightness signal in the initial brightness function;
the LED brightness variable in the accelerated brightness function and the brightness signal duty ratio variable in the accelerated brightness function are changed according to a first slope;
and the LED brightness variable in the stable brightness function and the brightness signal duty ratio variable in the stable brightness function are changed according to a second slope.
5. The controller of claim 2, wherein:
in the preset signal duty ratio-LED color temperature mapping relation, the LED color temperature variable is in direct proportion to the color temperature signal duty ratio variable;
the color temperature signal duty ratio variable comprises a first color temperature threshold value and a second color temperature threshold value;
when the color temperature signal duty ratio variable changes from zero to the first color temperature threshold value, the color temperature corresponding to the LED color temperature variable gradually changes from warm light to white light;
when the color temperature signal duty ratio variable changes from the first color temperature threshold value to the second color temperature threshold value, the color temperature corresponding to the LED color temperature variable gradually changes from white light to cold light.
6. The controller of claim 3, wherein:
the signal receiving and generating module further comprises an identification information analyzing unit which is configured to analyze the identification information of the color LED lamp to be adjusted from the first instruction;
the signal output control module further comprises an adjustment control unit configured to control the color LED lamp corresponding to the identification information to perform color adjustment according to the identification information and the second PWM level signal;
the color LEDs comprise red LEDs, blue LEDs and green LEDs, and the identification information comprises at least one of first identification information corresponding to the red LEDs, second identification information corresponding to the blue LEDs and third identification information corresponding to the green LEDs.
7. The controller of claim 1, wherein the controller further comprises:
the state query module is configured to receive a second instruction which is transmitted by the external device and used for querying the current state of the hue LED lamp and/or the color LED lamp, and return the current state information of the hue LED lamp and/or the color LED lamp to the external device;
the history instruction calling module is configured to receive a history calling instruction transmitted by the external equipment, query history instruction storage data according to the history calling instruction, obtain a first history instruction matched with the history calling instruction, and input the first history instruction into the signal receiving and generating module;
and the on-off control module is configured to receive a third instruction for controlling on-off transmitted by the external equipment and control the on-off type equipment to be connected or disconnected according to the third instruction.
8. An LED control method, characterized by:
receiving a first instruction transmitted by external equipment, generating a first PWM (pulse width modulation) signal for controlling a hue LED lamp to perform hue adjustment according to the first instruction, and controlling a hue interface to be communicated with the hue LED lamp according to the first PWM signal to realize hue adjustment and/or adjustment of the hue LED lamp;
receiving a first instruction transmitted by external equipment, generating a second PWM signal for controlling a color LED lamp to perform color adjustment according to the first instruction, and controlling a color interface to be communicated with the color LED lamp according to the second PWM signal to realize color adjustment of the color LED lamp.
9. The control method according to claim 8, characterized in that:
receiving a first instruction transmitted by external equipment, and judging whether the first instruction contains LED brightness information, LED color temperature information and LED color information;
when the first instruction is judged to contain LED brightness information, analyzing the first instruction to obtain the LED brightness information, calculating a brightness adjusting signal duty ratio corresponding to the LED brightness information according to a preset signal duty ratio-LED brightness mapping relation, and generating a first PWM signal according to the brightness adjusting signal duty ratio; carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out brightness adjustment on the hue LED lamp according to the first PWM level signal;
when the first instruction is judged to contain LED color temperature information, analyzing the first instruction to obtain the LED color temperature information, calculating a color temperature adjusting signal duty ratio corresponding to the LED color temperature information according to a preset signal duty ratio-LED color temperature mapping relation, and generating a first PWM signal according to the color temperature adjusting signal duty ratio; carrying out level adjustment on the first PWM signal to obtain a first PWM level signal, and carrying out color temperature adjustment on the hue LED lamp according to the first PWM level signal;
when the first instruction is judged to contain LED color information, analyzing the first instruction to obtain identification information and color value information of at least one to-be-adjusted color LED lamp, calculating a color value adjusting signal duty ratio corresponding to the color value information according to a preset signal duty ratio-LED color value mapping relation, and generating a second PWM signal according to the color value adjusting signal duty ratio; and carrying out level adjustment on the second PWM signal to obtain a second PWM level signal, and controlling the color LED lamp corresponding to the identification information to carry out color adjustment according to the identification information and the second PWM level signal.
10. The control method according to claim 8, characterized in that: the control method further comprises the steps of receiving a second instruction which is transmitted by the external equipment and used for inquiring the current state of the hue LED lamp and/or the color LED lamp, and returning the current state information of the hue LED lamp and/or the color LED lamp to the external equipment;
receiving a historical calling instruction transmitted by the external equipment, inquiring historical instruction storage data according to the historical calling instruction to obtain a first historical instruction matched with the historical calling instruction, and inputting the first historical instruction into the signal receiving and generating module;
and receiving a third instruction for controlling on-off transmitted by the external equipment, and controlling on-off type equipment to be connected or disconnected according to the third instruction.
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