A method, apparatus, lighting device and storage medium for controlling light combination

Abstract

This invention discloses a method, apparatus, lighting device, and storage medium for controlling light combining, comprising: determining the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal output by the corresponding driving circuit of the monochromatic LED light source; determining a temperature compensation coefficient characterizing the difference between the test luminous flux and the maximum luminous flux of the monochromatic LED light source at different test temperatures; calculating the target luminous flux and the target PWM value at the real-time temperature, and using the target PWM value to adjust the monochromatic LED light source at the real-time temperature to control the combined light color of the lamp. By adjusting the target PWM value of the monochromatic LED light source, the color output of the monochromatic LED light source can be kept stable and unaffected by real-time temperature changes, thereby ensuring that the combined light color does not change with temperature changes, and thus keeping the output of the combined light color constant, avoiding color drift and color difference problems.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, specifically to a light-combining control method, device, lighting equipment, and storage medium. Background Technology

[0002] Light mixing refers to the process of mixing two or more lights at different brightness levels to obtain a target color. For example, in existing light mixing technology, various colors can be mixed by adjusting the brightness of red, green, and blue LEDs. However, because the emission wavelength of LEDs is affected by temperature, as the temperature rises, the emission wavelength of LEDs becomes longer, and the color undergoes a redshift. This causes changes in the spectrum of the monochromatic colors involved in light mixing, resulting in a deviation in the color after light mixing. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a light-combining control method, device, lighting equipment, and storage medium, which can keep the output color of the combined light constant, unaffected by changes in ambient temperature, and avoid color drift and color difference problems.

[0004] In a first aspect, the present invention proposes a method for controlling light combination, comprising:

[0005] The luminaire includes multiple monochromatic LED light sources and driving circuits corresponding to the monochromatic LED light sources, wherein at least two of the monochromatic LED light sources emit different colors.

[0006] Determine the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal output by the driving circuit corresponding to the monochromatic LED light source;

[0007] Given a test PWM signal by the driving circuit corresponding to the monochrome LED light source, a temperature compensation coefficient is determined to characterize the difference between the test luminous flux and the maximum luminous flux of the monochrome LED light source at different test temperatures.

[0008] The initial luminous flux of the monochromatic LED light source is obtained at a first temperature and a second temperature, and the target luminous flux at a real-time temperature is calculated using the first temperature, the second temperature, and the initial luminous flux; wherein the first temperature is lower than the second temperature;

[0009] The target PWM value at the real-time temperature is determined based on the mapping relationship, the temperature compensation coefficient, and the target luminous flux.

[0010] The target PWM value is used to adjust the monochromatic LED light source at the real-time temperature to control the combined light color of the lamp.

[0011] According to some embodiments of the present invention, determining the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal output by the driving circuit corresponding to the monochromatic LED light source includes the following steps:

[0012] Under the arbitrary PWM signal output by the driving circuit of the monochromatic LED light source, several experimental PWM values ​​and corresponding experimental luminous flux are obtained;

[0013] The experimental luminous flux was normalized to obtain the normalized luminous flux;

[0014] By fitting the normalized luminous flux with the corresponding experimental PWM value at coordinate points, the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal is obtained.

[0015] According to some embodiments of the present invention, the formula for the mapping relationship is expressed as follows:

[0016] Dn = f(Φn / Φnmax),

[0017] Wherein, n represents the number of types of monochromatic LED light sources, Φn represents the luminous flux of the nth type of monochromatic LED light source, Φnmax represents the maximum value of the nth type of monochromatic LED light source in the test luminous flux, and Dn represents the value corresponding to the PWM signal of the nth type of monochromatic LED light source.

[0018] According to some embodiments of the present invention, when the driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, determining a temperature compensation coefficient characterizing the difference between the test luminous flux and the maximum luminous flux of the monochromatic LED light source at different test temperatures includes the following steps:

[0019] Given a test PWM signal, the test luminous flux of the monochromatic LED light source at different test temperatures is obtained, and the maximum luminous flux at the first temperature is obtained;

[0020] Calculate the ratios between the measured luminous flux and the maximum luminous flux to obtain several luminous flux coefficients;

[0021] The temperature compensation coefficient is obtained by fitting the coordinate points using the luminous flux coefficient and the corresponding test temperature.

[0022] According to some embodiments of the present invention, obtaining the initial luminous flux of the monochromatic LED light source at a first temperature and a second temperature, and calculating the target luminous flux at a real-time temperature using the first temperature, the second temperature, and the initial luminous flux, includes the following steps:

[0023] Obtain the first initial luminous flux of the monochromatic LED light source at the first temperature;

[0024] Obtain the second initial luminous flux of the monochromatic LED light source at the second temperature;

[0025] The target luminous flux at the real-time temperature is calculated using the first temperature, the second temperature, the first initial luminous flux, and the second initial luminous flux; wherein the initial luminous flux includes the first initial luminous flux and the second initial luminous flux.

[0026] According to some embodiments of the present invention, the formula for the target luminous flux is expressed as:

[0027] Φn 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1),

[0028] Wherein Φn 目 ΦnL represents the target luminous flux of the nth monochromatic LED light source, ΦnH represents the first initial luminous flux of the nth monochromatic LED light source, T1 represents the first temperature, T2 represents the second temperature, and Ti represents the real-time temperature.

[0029] According to some embodiments of the present invention, the formula for the target PWM value is expressed as follows:

[0030] Dni=f(Φn 目 / (Φnmax*ηi))

[0031] Wherein, Dni represents the target PWM value of the nth type of monochromatic LED light source, and ηi represents the temperature compensation coefficient of the nth type of monochromatic LED light source at the real-time temperature.

[0032] Secondly, embodiments of the present invention also provide a light-combining control device, comprising:

[0033] Several color driving modules, each of which is used to control a monochrome LED light source;

[0034] Temperature sensing module, used to detect real-time temperature;

[0035] A light combining module is connected to the temperature sensing module to receive the real-time temperature and obtain the target luminous flux based on the real-time temperature;

[0036] A PWM module, connected to the light combining module, receives the target light flux and obtains the target PWM value based on the target light flux;

[0037] The control module is connected to the temperature sensing module to monitor the real-time temperature; it is also connected to the PWM module and several color driving modules to control the operation of the color driving modules according to the target PWM value.

[0038] Thirdly, embodiments of the present invention also provide a lighting device, comprising: at least one hybrid light source; at least one controller; wherein the controller controls the lighting device to emit the hybrid light source by means of a target PWM value obtained by any of the above methods.

[0039] Fourthly, embodiments of the present invention also provide a storage medium, which is a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, which are used to cause a computer to perform: any of the methods described above.

[0040] According to an embodiment of the present invention, a light combining control method, apparatus, lighting device, and storage medium have at least the following beneficial effects: by obtaining the target luminous flux and target PWM value of a monochromatic LED light source at a real-time temperature through mapping relationship, temperature compensation coefficient, first temperature, second temperature, and initial luminous flux, and then adjusting the value of the driving circuit corresponding to the monochromatic LED light source according to the target PWM value, the color of the monochromatic LED light source is kept stable and is not affected by real-time temperature changes, so that the combined light color does not change with temperature changes, thereby keeping the output of the combined light color unchanged and avoiding color drift and color difference problems.

[0041] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0043] Figure 1 This is a schematic diagram of a light-combining control device according to an embodiment of the present invention. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0046] In the description of this invention, the use of terms such as first, second, third, fourth, fifth, etc., is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "setup" and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] A photosynthesis control method according to an embodiment of the present invention includes:

[0049] Step S100: The lamp includes multiple monochromatic LED light sources and driving circuits corresponding to the monochromatic LED light sources, and at least two of the monochromatic LED light sources emit different colors;

[0050] Step S200: Determine the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal output by the driving circuit corresponding to the monochromatic LED light source;

[0051] Step S300: When the driving circuit corresponding to the monochrome LED light source is given a test PWM signal, determine the temperature compensation coefficient that characterizes the difference between the test luminous flux and the maximum luminous flux of the monochrome LED light source at different test temperatures;

[0052] Step S400: Obtain the initial luminous flux of the monochromatic LED light source at a first temperature and a second temperature, and calculate the target luminous flux at a real-time temperature using the first temperature, the second temperature, and the initial luminous flux; wherein the first temperature is lower than the second temperature;

[0053] Step S500: Determine the target PWM value at the real-time temperature based on the mapping relationship, the temperature compensation coefficient, and the target luminous flux;

[0054] Step S600: Adjust the monochromatic LED light source at the real-time temperature using the target PWM value to control the combined light color of the lamp.

[0055] Specifically, in step S100, the combined light color is generally composed of two or more monochromatic LED light sources of different colors. Therefore, the driving circuit can control the emission of different monochromatic LED light sources to form the desired combined light color. In step S200, by obtaining a large amount of luminous flux and the corresponding PWM value under the PWM signal, the mapping relationship between the two can be obtained. In step S300, by analyzing the relationship between the test luminous flux and the maximum luminous flux, the temperature compensation coefficient at different test temperatures can be obtained. In steps S400-S600, the real-time temperature refers to the temperature of the combined light color in the real-time environment. By adjusting the monochromatic LED light source in real time through the target PWM value, the color of the monochromatic LED light source can meet the requirements, thereby ensuring that the combined light color remains uniform and is not affected by the ambient temperature.

[0056] Therefore, under the processing of steps S100-S600, the target PWM value of each monochromatic LED light source at the real-time temperature can be obtained. By adjusting the target PWM value, the monochromatic LED light source can maintain a stable color output, unaffected by real-time temperature changes, so that the combined light color does not change with temperature changes, and thus the output of the combined light color remains unchanged, avoiding color drift and color difference problems.

[0057] In some specific embodiments of the present invention, determining the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal output by the driving circuit corresponding to the monochromatic LED light source includes the following steps:

[0058] Step S210: Under the arbitrary PWM signal output by the driving circuit of the monochromatic LED light source, obtain several experimental PWM values ​​and corresponding experimental luminous flux;

[0059] Step S220: Normalize the experimental luminous flux to obtain normalized luminous flux;

[0060] Step S230: Fit the normalized luminous flux to the corresponding experimental PWM value using coordinate points to obtain the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal.

[0061] Specifically, the driving circuit outputs an arbitrary PWM signal to obtain an arbitrary experimental PWM value. Under this arbitrary experimental PWM value, the corresponding experimental luminous flux is acquired. The experimental PWM value is randomly selected without any limitations. Since the experimental luminous flux varies, it is normalized. Then, a coordinate axis is established, with the normalized luminous flux as the horizontal axis and the experimental PWM value as the vertical axis. The coordinate points are fitted to obtain the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal. This mapping relationship better reflects the linearity between the two, which improves data processing efficiency and facilitates data acquisition.

[0062] In some specific embodiments of the present invention, the formula for the mapping relationship is expressed as:

[0063] Dn = f(Φn / Φnmax),

[0064] Wherein, n represents the number of types of monochromatic LED light sources, that is, n types of monochromatic LED light sources constitute the required combined light color; Φn represents the luminous flux of the nth type of monochromatic LED light source, Φnmax represents the maximum value of the nth type of monochromatic LED light source in the test luminous flux, and Dn represents the value corresponding to the PWM signal of the nth type of monochromatic LED light source.

[0065] Specifically, during testing, several experimental luminous fluxes can be obtained from several experimental PWM values, and Φnmax is the maximum value among these experimental luminous fluxes. This maximum value is a fixed value in the mapping formula; while Dn and Φn are variables, changing with each other. That is, inputting any luminous flux can yield a corresponding PWM value. Thus, the mapping relationship between luminous flux and the PWM signal is beneficial for improving data processing efficiency and facilitating data acquisition.

[0066] In some specific embodiments of the present invention, when the driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, determining the temperature compensation coefficient characterizing the difference between the test luminous flux and the maximum luminous flux of the monochromatic LED light source at different test temperatures includes the following steps:

[0067] Step S310: Given a test PWM signal, obtain the test luminous flux of the monochromatic LED light source at different test temperatures, and obtain the maximum luminous flux at the first temperature;

[0068] Step S320: Calculate the ratios between several of the tested luminous fluxes and the maximum luminous flux to obtain several luminous flux coefficients;

[0069] Step S330: Fit the coordinate points using the luminous flux coefficient and the corresponding test temperature to obtain the temperature compensation coefficient.

[0070] Specifically, the test PWM signal is set to enable the driving circuit corresponding to the monochromatic LED light source to reach its maximum PWM value. Therefore, with the driving circuit outputting the maximum PWM value, the luminous flux at different test temperatures is collected, and the ratios between several test luminous fluxes and the maximum luminous flux are calculated to obtain several luminous flux coefficients. At this point, each luminous flux coefficient uniquely corresponds to a test temperature. By establishing a coordinate axis with the test temperature as the horizontal axis and the luminous flux coefficient as the vertical axis, the coordinate points are fitted to obtain the temperature compensation coefficient of the monochromatic LED light source at various temperatures.

[0071] The temperature compensation coefficient is expressed as ηi=f(Ti), where Ti represents the test temperature and ηi represents the temperature compensation coefficient. It can be seen that by inputting different test temperatures, the temperature compensation coefficient at the corresponding temperature can be obtained, which makes it easy to adjust the data according to changes in ambient temperature and achieve control over the color of the combined light.

[0072] In some specific embodiments of the present invention, obtaining the initial luminous flux of the monochromatic LED light source at a first temperature and a second temperature, and calculating the target luminous flux at a real-time temperature using the first temperature, the second temperature, and the initial luminous flux, includes the following steps:

[0073] Step S410: Obtain the first initial luminous flux of the monochromatic LED light source at the first temperature;

[0074] Step S420: Obtain the second initial luminous flux of the monochromatic LED light source at the second temperature;

[0075] Step S430: Calculate the target luminous flux at the real-time temperature using the first temperature, the second temperature, the first initial luminous flux, and the second initial luminous flux; wherein the initial luminous flux includes the first initial luminous flux and the second initial luminous flux.

[0076] Specifically, the first temperature is the lowest temperature that a monochromatic LED light source can typically reach in its operating environment, and the second temperature is the highest temperature that a monochromatic LED light source can typically reach in its operating environment. By analyzing the relationship between the first temperature, the second temperature, the first initial luminous flux, and the second initial luminous flux, the target luminous flux at the real-time temperature can be obtained. This target luminous flux is the actual data required by the monochromatic LED light source at that real-time temperature. Therefore, obtaining the target luminous flux facilitates the control of the combined light color.

[0077] In some specific embodiments of the present invention, the formula for the target luminous flux is expressed as:

[0078] Φn 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1),

[0079] Wherein Φn 目 ΦnL represents the target luminous flux of the nth monochromatic LED light source, ΦnH represents the first initial luminous flux of the nth monochromatic LED light source, T1 represents the first temperature, T2 represents the second temperature, and Ti represents the real-time temperature.

[0080] Specifically, ΦnL, ΦnH, T1, and T2 are all fixed data obtained from the test; Ti represents the real-time temperature, which is a variable; Φn 目 It is also a variable, changing with the real-time temperature. Based on the above formula, the target luminous flux required by the monochromatic LED light source at the real-time temperature can be obtained, thus facilitating the control of the combined light color.

[0081] In some specific embodiments of the present invention, the formula for the target PWM value is expressed as follows:

[0082] Dni=f(Φn 目 / (Φnmax*ηi))

[0083] Wherein, Dni represents the target PWM value of the nth type of monochrome LED light source, and ηi represents the temperature compensation coefficient of the nth type of monochrome LED light source at the real-time temperature.

[0084] Specifically, Φnmax is the maximum value of the monochromatic LED light source in the experimental luminous flux. Therefore, to obtain the actual situation of the monochromatic LED light source at real-time temperature, Φnmax is multiplied by ηi to obtain the maximum value of the monochromatic LED light source at real-time temperature. Then, Φnmax*ηi and the target luminous flux Φn are... 目 Substituting into the mapping formula, we can obtain the target PWM value corresponding to the target luminous flux. This target PWM value is the actual data required by the monochromatic LED light source at the real-time temperature. It can be seen that by obtaining the target PWM value, it is convenient to control the color of the combined light.

[0085] The following describes in detail the light-combining control method according to an embodiment of the present invention with a specific example. It is worth understanding that the following description is merely illustrative and not a specific limitation of the invention.

[0086] A method for controlling photosynthesis according to an embodiment of the present invention includes the following steps:

[0087] Step S100: The lamp includes multiple monochromatic LED light sources and driving circuits corresponding to the monochromatic LED light sources, and at least two of the monochromatic LED light sources emit different colors;

[0088] Step S210: Under the arbitrary PWM signal output by the driving circuit of the monochromatic LED light source, obtain several experimental PWM values ​​and corresponding experimental luminous flux;

[0089] Step S220: Normalize the experimental luminous flux to obtain normalized luminous flux;

[0090] Step S230: Fit the normalized luminous flux with the corresponding experimental PWM value using coordinate points to obtain the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal;

[0091] Step S310: Given a test PWM signal, obtain the test luminous flux of the monochromatic LED light source at different test temperatures, and obtain the maximum luminous flux at the first temperature;

[0092] Step S320: Calculate the ratios between several of the tested luminous fluxes and the maximum luminous flux to obtain several luminous flux coefficients;

[0093] Step S330: Fit the coordinate points using the luminous flux coefficient and the corresponding test temperature to obtain the temperature compensation coefficient;

[0094] Step S410: Obtain the first initial luminous flux of the monochromatic LED light source at the first temperature;

[0095] Step S420: Obtain the second initial luminous flux of the monochromatic LED light source at the second temperature;

[0096] Step S430: Calculate the target luminous flux at the real-time temperature using the first temperature, the second temperature, the first initial luminous flux, and the second initial luminous flux; wherein the initial luminous flux includes the first initial luminous flux and the second initial luminous flux;

[0097] Step S500: Determine the target PWM value at the real-time temperature based on the mapping relationship, the temperature compensation coefficient, and the target luminous flux;

[0098] Step S600: Adjust the monochromatic LED light source at the real-time temperature using the target PWM value to control the combined light color of the lamp.

[0099] According to the light-combining control method of the present invention, by setting it up as follows, at least the following effects can be achieved: the mapping relationship, temperature compensation coefficient, first temperature, second temperature, first initial luminous flux, and second initial luminous flux are all obtained from test data; the real-time temperature is the temperature of the monochromatic LED light source in the actual environment; and the target luminous flux and target PWM value are the data actually required by the monochromatic LED light source at the real-time temperature. Since the combined light color is composed of several monochromatic LED light sources, the above steps are performed on each monochromatic LED light source to obtain the target PWM value actually required by each monochromatic LED light source. Adjusting each monochromatic LED light source according to the target PWM value can ensure that the combined light color remains uniform, unaffected by the ambient temperature, and avoids color drift and color difference problems.

[0100] This application also provides a light-combining control device, comprising:

[0101] Several color driving modules, each of which is used to control a monochrome LED light source;

[0102] Temperature sensing module, used to detect real-time temperature;

[0103] A light combining module is connected to the temperature sensing module to receive the real-time temperature and obtain the target luminous flux based on the real-time temperature;

[0104] A PWM module, connected to the light combining module, receives the target light flux and obtains the target PWM value based on the target light flux;

[0105] The control module is connected to the temperature sensing module to monitor the real-time temperature; it is also connected to the PWM module and several color driving modules to control the operation of the color driving modules according to the target PWM value.

[0106] Specifically, the light combining module stores the calculation formula Φn for the target luminous flux. 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1), where the PWM module stores the calculation formula for the target PWM value at the real-time temperature: Dni=f(Φn 目 / (Φnmax*ηi)), and at the same time, the light combining module and the PWM module have the ability to analyze and process data.

[0107] The actual adjustment process of the combined light color is as follows: The temperature sensing module monitors the real-time temperature of the operating environment and transmits this real-time temperature to both the combined light module and the control module. The control module, upon receiving the real-time temperature, monitors the operating environment temperature and issues an alarm when the ambient temperature changes abnormally. The combined light module, upon receiving the real-time temperature, calculates the target luminous flux using the target luminous flux calculation formula and transmits this target luminous flux to the PWM module. The PWM module, upon receiving the target luminous flux, calculates the target PWM value using the target PWM value calculation formula and transmits this target PWM value to the control module. The control module then transmits a specific PWM signal to the color driving module based on the target PWM value. The color driving module adjusts its real-time PWM value to the target PWM value based on this PWM signal.

[0108] Since the combined light color is composed of several monochromatic LED light sources, and each monochromatic LED light source corresponds to a color driving module, the combined light module can obtain the target luminous flux corresponding to each monochromatic LED light source, the PWM module can obtain the target PWM value corresponding to each monochromatic LED light source, and the control module transmits a specific PWM signal to each color driving module according to the situation of each monochromatic LED light source, so that the color of each monochromatic LED light source meets the actual requirements, thereby ensuring that the combined light color remains uniform and is not affected by the ambient temperature.

[0109] To achieve the above objectives, a third aspect of this application provides a lighting device comprising: at least one hybrid light source; at least one controller; wherein the controller controls the lighting device to emit the hybrid light source by means of a target PWM value obtained by any of the above methods.

[0110] To achieve the above objectives, a fourth aspect of this application provides a storage medium that is a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a control method such as the light-combining control method described in the above embodiments.

[0111] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0112] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0113] In the description of this specification, references to terms such as "one embodiment," "some embodiments," or "this embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for controlling photosynthesis, characterized in that, include: The luminaire includes multiple monochromatic LED light sources and driving circuits corresponding to the monochromatic LED light sources, wherein at least two of the monochromatic LED light sources emit different colors. Under the condition that the driving circuit of the monochromatic LED light source at the same temperature outputs an arbitrary PWM signal, several experimental PWM values ​​and corresponding experimental luminous flux are obtained; The experimental luminous flux was normalized to obtain the normalized luminous flux; The normalized luminous flux is fitted to the corresponding experimental PWM value using coordinate points to obtain the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal; wherein the formula for the mapping relationship is expressed as: Dn=f(Φn / Φnmax), where n represents the number of types of monochromatic LED light sources, Φn represents the luminous flux of the nth type of monochromatic LED light source, Φnmax represents the maximum value of the nth type of monochromatic LED light source in the experimental luminous flux, and Dn represents the value corresponding to the PWM signal of the nth type of monochromatic LED light source; When the driving circuit corresponding to the monochrome LED light source is given a test PWM signal, a temperature compensation coefficient is determined to characterize the difference between the test luminous flux of the monochrome LED light source at different test temperatures and the maximum luminous flux at a first temperature; wherein, the first temperature is the lowest temperature reached by the monochrome LED light source in the working environment. The initial luminous flux of the monochromatic LED light source is obtained at a first temperature and a second temperature, and the target luminous flux at a real-time temperature is calculated using the first temperature, the second temperature, and the initial luminous flux; wherein the first temperature is lower than the second temperature; The luminous flux value at the real-time temperature is determined based on the temperature compensation coefficient, and the target PWM value at the real-time temperature is determined using the mapping relationship, the target luminous flux, and the luminous flux value at the real-time temperature. The target PWM value is used to adjust the monochromatic LED light source at the real-time temperature to control the combined light color of the lamp.

2. The method for controlling photosynthesis according to claim 1, characterized in that: When the driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, the temperature compensation coefficient characterizing the difference between the test luminous flux and the maximum luminous flux of the monochromatic LED light source at different test temperatures is determined, including the following steps: Given a test PWM signal, the test luminous flux of the monochromatic LED light source at different test temperatures is obtained, and the maximum luminous flux at the first temperature is obtained, wherein the test PWM signal is the maximum PWM signal; Calculate the ratios between the measured luminous flux and the maximum luminous flux to obtain several luminous flux coefficients; The temperature compensation coefficient is obtained by fitting the coordinate points using the luminous flux coefficient and the corresponding test temperature.

3. The method for controlling photosynthesis according to claim 1, characterized in that: Obtaining the initial luminous flux of the monochromatic LED light source at a first temperature and a second temperature, and calculating the target luminous flux at a real-time temperature using the first temperature, the second temperature, and the initial luminous flux, includes the following steps: Obtain the first initial luminous flux of the monochromatic LED light source at the first temperature; Obtain the second initial luminous flux of the monochromatic LED light source at the second temperature; The target luminous flux at the real-time temperature is calculated using the first temperature, the second temperature, the first initial luminous flux, and the second initial luminous flux; wherein the initial luminous flux includes the first initial luminous flux and the second initial luminous flux.

4. The method for controlling photosynthesis according to claim 3, characterized in that: The formula for the target luminous flux is expressed as follows: Φn 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1), Wherein Φn 目 ΦnL represents the target luminous flux of the nth monochromatic LED light source, ΦnH represents the first initial luminous flux of the nth monochromatic LED light source, T1 represents the first temperature, T2 represents the second temperature, and Ti represents the real-time temperature.

5. The method for controlling photosynthesis according to claim 4, characterized in that: The formula for the target PWM value is expressed as follows: Dni=f(Φn 目 / (Φnmax*ηi)) Wherein, Dni represents the target PWM value of the nth type of monochrome LED light source, and ηi represents the temperature compensation coefficient of the nth type of monochrome LED light source at the real-time temperature.

6. A light-combining control device, characterized in that, include: Several color driving modules, each of which is used to control a monochrome LED light source; Temperature sensing module, used to detect real-time temperature; A light combining module is connected to the temperature sensing module to receive the real-time temperature and obtain the target luminous flux based on the real-time temperature; A PWM module is connected to the light combining module; the PWM module stores the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal, as well as the temperature compensation coefficient for the difference between the test luminous flux of the monochromatic LED light source at different test temperatures and the maximum luminous flux at the first temperature; the PWM module determines the luminous flux value at the real-time temperature based on the temperature compensation coefficient, and determines the target PWM value at the real-time temperature using the mapping relationship, the target luminous flux, and the luminous flux value at the real-time temperature; The control module is connected to the temperature sensing module to monitor the real-time temperature; it is also connected to the PWM module and several color driving modules to control the operation of the color driving modules according to the target PWM value.

7. A lighting device, characterized in that, include: At least one hybrid light source; at least one controller; wherein the controller controls the lighting device to emit the hybrid light source by means of a target PWM value obtained by any one of claims 1-5.

8. A storage medium, said storage medium being a computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the method as described in any one of claims 1 to 5.

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