Light combination control method and device, lighting equipment and storage medium

Abstract

The invention discloses a light combination control method and device, lighting equipment and a storage medium. The light combination control method comprises the steps that the mapping relation between the luminous flux of a single-color LED light source and a PWM signal output by a drive circuit corresponding to the single-color LED light source is determined; determining a temperature compensation coefficient representing the difference between the test luminous flux and the maximum luminous flux of the monochromatic LED light source at different test temperatures; and calculating the target luminous flux and the target PWM value at the real-time temperature, and adjusting the monochromatic LED light source at the real-time temperature by using the target PWM value so as to control the light combination color of the lamp. By adjusting the target PWM value of the single-color LED light source, the color of the single-color LED light source can be stably output and is not influenced by real-time temperature change, so that the light combination color does not change along with the temperature change, the output of the light combination color is kept unchanged, and the problems of color drift and color difference are avoided.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a light combining control method, device, lighting equipment and storage medium. Background Art

[0002] Light combination refers to the process of mixing two or more lights at different brightnesses to obtain the target color. For example, in the existing light combination technology, various colors can be mixed by adjusting the brightness of the three color LEDs, red, green and blue. However, since the light emission wavelength of the LED is affected by temperature, as the temperature rises, the light emission wavelength of the LED will become longer and the color will redshift, which will change the spectrum of the monochromatic color involved in the light combination, resulting in a deviation in the color after light combination. Summary of the invention

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

[0004] In a first aspect, the present invention provides a light combining control method, comprising:

[0005] The lamp comprises a plurality of monochromatic LED light sources and a driving circuit corresponding to the monochromatic LED light sources, and at least two of the monochromatic LED light sources emit light of different colors;

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

[0007] When a driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, determining a temperature compensation coefficient representing a difference between a test luminous flux and a maximum luminous flux of the monochromatic LED light source at different test temperatures;

[0008] 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 the 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;

[0009] Determine a target PWM value at a real-time temperature according to 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 a mapping relationship between the luminous flux of the monochromatic LED light source and a PWM signal output by a driving circuit corresponding to the monochromatic LED light source comprises the following steps:

[0012] When the driving circuit of the monochromatic LED light source outputs an arbitrary PWM signal, obtaining a number of test PWM values ​​and corresponding test luminous fluxes;

[0013] Normalizing the test luminous flux to obtain a normalized luminous flux;

[0014] The normalized luminous flux and the corresponding test PWM value are fitted with coordinate points to obtain a mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal.

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

[0016] Dn=f(Φn / Φnmax),

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

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

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

[0020] Calculating the ratios between a number of the test luminous fluxes and the maximum luminous flux to obtain a number of luminous flux coefficients;

[0021] The light flux coefficient and the corresponding test temperature are used to fit the coordinate points to obtain a temperature compensation coefficient.

[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, comprises the following steps:

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

[0024] Acquire a second initial luminous flux of the monochromatic LED light source at a 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 a first initial luminous flux and a second initial luminous flux.

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

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

[0028] Among them, Φn 目 represents the target luminous flux of the nth monochromatic LED light source, ΦnL represents the first initial luminous flux of the nth monochromatic LED light source, ΦnH represents the second 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 of the target PWM value is expressed as:

[0030] Dni=f(Φn 目 / (Φnmax*ηi))

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

[0032] In a second aspect, an embodiment of the present invention further provides a light combining control device, including:

[0033] A plurality of color driving modules, each of which is used to control a single-color LED light source;

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

[0035] a light combining module connected to the temperature sensing module to receive the real-time temperature and obtain a target luminous flux according to the real-time temperature;

[0036] A PWM module, connected to the light combining module, to receive the target luminous flux and obtain a target PWM value according to the target luminous flux;

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

[0038] In a third aspect, an embodiment of the present invention further proposes a lighting device, comprising: at least one mixed light source; and at least one controller; wherein the controller controls the lighting device to emit the mixed light source through a target PWM value obtained by any of the above methods.

[0039] In a fourth aspect, an embodiment of the present invention further proposes a storage medium, which is a computer-readable storage medium, and is characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute: any of the methods described above.

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

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0043] Figure 1 is a schematic diagram of a light combining control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

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

[0046] In the description of the present invention, if there is a description of first, second, third, fourth, fifth, etc., it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0047] In the description of the present invention, unless otherwise clearly defined, words such as setting and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

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

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

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

[0051] Step S300: determining a temperature compensation coefficient representing the difference between a test luminous flux and a maximum luminous flux of the monochromatic LED light source at different test temperatures when a drive circuit corresponding to the monochromatic LED light source is given a test PWM signal;

[0052] Step S400: 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 the 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: determining a target PWM value at a real-time temperature according to the mapping relationship, the temperature compensation coefficient and the target luminous flux;

[0054] Step S600: 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.

[0055] Specifically, in step S100, the combined light color is generally composed of two or more monochromatic LED light sources of different colors. Therefore, different monochromatic LED light sources can be controlled to emit light through the driving circuit, so as to form the desired combined light color; in step S200, by obtaining a large amount of luminous flux and the PWM value under the corresponding 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 under 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 demand, thereby ensuring that the combined light color remains uniform and is not affected by the ambient temperature.

[0056] It can be seen that under the processing of steps S100 to S600, the target PWM value of each monochromatic LED light source under the real-time temperature can be obtained, and the monochromatic LED light source can maintain a stable color output by adjusting the target PWM value, which is not affected by real-time temperature changes, so that the combined light color does not change with temperature changes, and 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 comprises the following steps:

[0058] Step S210: obtaining a number of test PWM values ​​and corresponding test luminous fluxes when the driving circuit of the monochromatic LED light source outputs an arbitrary PWM signal;

[0059] Step S220: normalizing the test luminous flux to obtain a normalized luminous flux;

[0060] Step S230: fitting the normalized luminous flux and the corresponding test PWM value in coordinate points to obtain a 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 test PWM value, and obtains the corresponding test luminous flux under the arbitrary test PWM value, wherein the test PWM value is randomly selected and has no relevant restrictions. Since there are differences between the test luminous fluxes, they are normalized, and then a coordinate axis is established, with the normalized luminous flux as the horizontal coordinate data and the test PWM value as the vertical coordinate data, and the coordinate points are fitted, so as to obtain the mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal. Among them, the mapping relationship can better reflect the linear situation between the two, which is conducive to improving the data operation efficiency and facilitating the acquisition of data.

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

[0063] Dn=f(Φn / Φnmax),

[0064] Among them, n represents the number of types of the 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 the monochromatic LED light source, Φnmax represents the maximum value of the nth type of the monochromatic LED light source in the test luminous flux, and Dn represents the numerical value corresponding to the PWM signal of the nth type of the monochromatic LED light source.

[0065] Specifically, when conducting a test, several test luminous fluxes can be obtained through several test PWM values, and Φnmax is the maximum value among the above-mentioned test luminous fluxes, which is a fixed value in the formula of the mapping relationship; while Dn and Φn are variables, and both change with the change of each other, that is, by inputting any luminous flux, a corresponding PWM value can be obtained. It can be seen that the mapping relationship between the luminous flux and the PWM signal is conducive to improving the data calculation efficiency and facilitating data acquisition.

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

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

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

[0069] Step S330: fitting coordinate points using the luminous flux coefficient and the corresponding test temperature to obtain a 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 the maximum PWM value. Therefore, when the driving circuit outputs the maximum PWM value, the test luminous flux at different test temperatures is collected, and the ratio between several test luminous fluxes and the maximum luminous flux is calculated to obtain several luminous flux coefficients. At this time, each luminous flux coefficient has a unique corresponding test temperature. By establishing a coordinate axis, taking the test temperature as the horizontal coordinate data and the luminous flux coefficient as the vertical coordinate data, the coordinate points are fitted, so as to obtain the temperature compensation coefficient of the monochromatic LED light source at various temperatures.

[0071] The formula of the temperature compensation coefficient is expressed as ηi=f(Ti), 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, so that the data can be adjusted according to the change of ambient temperature to achieve the regulation of the combined light color.

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

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

[0074] Step S420: obtaining a second initial luminous flux of the monochromatic LED light source at a 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 a first initial luminous flux and a second initial luminous flux.

[0076] Specifically, the first temperature is the lowest temperature that a monochromatic LED light source can generally reach in a working environment, and the second temperature is the highest temperature that a monochromatic LED light source can generally reach in a working environment. By analyzing and processing 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. The target luminous flux 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 luminous flux, it is convenient to adjust the color of the combined light.

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

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

[0079] Among them, Φn 目 represents the target luminous flux of the nth monochromatic LED light source, ΦnL represents the first initial luminous flux of the nth monochromatic LED light source, ΦnH represents the second 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 and is a variable; Φn 目 It is also a variable and changes with the change of real-time temperature. According to the above formula, the target luminous flux required by the monochromatic LED light source at the real-time temperature can be obtained, so as to facilitate the regulation of the combined light color.

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

[0082] Dni=f(Φn 目 / (Φnmax*ηi))

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

[0084] Specifically, Φnmax is the maximum value of the monochromatic LED light source in the test luminous flux. Therefore, in order to obtain the actual situation of the monochromatic LED light source at the real-time temperature, Φnmax is multiplied by ηi to obtain the maximum value of the monochromatic LED light source at the real-time temperature. Then, Φnmax*ηi and the target luminous flux Φn 目 Substituting into the mapping relationship formula, the target PWM value corresponding to the target luminous flux can be obtained. The 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 light combining control method according to an embodiment of the present invention is described in detail below with a specific embodiment. It is worth noting that the following description is only an exemplary description and is not a specific limitation to the invention.

[0086] A light combining control method according to an embodiment of the present invention comprises the following steps:

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

[0088] Step S210: obtaining a number of test PWM values ​​and corresponding test luminous fluxes when the driving circuit of the monochromatic LED light source outputs an arbitrary PWM signal;

[0089] Step S220: normalizing the test luminous flux to obtain a normalized luminous flux;

[0090] Step S230: fitting the normalized luminous flux and the corresponding test PWM value in coordinate points to obtain a mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal;

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

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

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

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

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

[0096] Step S430: Calculating a 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 a first initial luminous flux and a second initial luminous flux;

[0097] Step S500: determining a target PWM value at a real-time temperature according to the mapping relationship, the temperature compensation coefficient and the target luminous flux;

[0098] Step S600: 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.

[0099] According to the light combining control method of the embodiment of the present invention, by such setting, at least some of the following effects can be achieved: the mapping relationship, the temperature compensation coefficient, the first temperature, the second temperature, the first initial luminous flux and the 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 the target PWM value are the data actually required by the monochromatic LED light source in the real-time temperature. Since the combined light color is composed of a number of monochromatic LED light sources, the above steps are performed on each monochromatic LED light source to obtain the target PWM value actually required for each monochromatic LED light source. By adjusting each monochromatic LED light source according to the target PWM value, it can be ensured that the combined light color remains uniform, is not affected by the ambient temperature, and avoids color drift and color difference problems.

[0100] The present application also provides a light combining control device, comprising:

[0101] A plurality of color driving modules, each of which is used to control a single-color LED light source;

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

[0103] a light combining module connected to the temperature sensing module to receive the real-time temperature and obtain a target luminous flux according to the real-time temperature;

[0104] A PWM module, connected to the light combining module, to receive the target luminous flux and obtain a target PWM value according to the target luminous flux;

[0105] The control module is connected to the temperature sensing module to monitor the real-time temperature; and is also connected to the PWM module and a plurality of the color driving modules respectively 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 of the target luminous flux Φn 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1), the PWM module stores the calculation formula of the target PWM value at the real-time temperature Dni=f(Φn 目 / (Φnmax*ηi)), at the same time, the light combining module and 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 the real-time temperature to the combined light module and the control module respectively, wherein the control module monitors the temperature of the operating environment after receiving the real-time temperature, and can alarm when the ambient temperature changes abnormally; and after the combined light module receives the real-time temperature, it obtains the target luminous flux according to the target luminous flux calculation formula, and transmits the target luminous flux to the PWM module; after the PWM module receives the target luminous flux, it obtains the target PWM value according to the target PWM value calculation formula, and transmits the target PWM value to the control module; the control module transmits a specific PWM signal to the color driving module according to the target PWM value, and the color driving module adjusts its real-time PWM value to the target PWM value according to the 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, and the PWM module can obtain the target PWM value corresponding to each monochromatic LED light source. 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 needs, thereby ensuring that the combined light color remains uniform and is not affected by the ambient temperature.

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

[0110] To achieve the above objectives, the fourth aspect of the present application proposes a storage medium, which is a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable the computer to execute: a control method of the light-combining control method of the above embodiment.

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

[0112] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", or "this embodiment" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A light combining control method, characterized in that: include: The lamp comprises a plurality of monochromatic LED light sources and a driving circuit corresponding to the monochromatic LED light sources, and at least two of the monochromatic LED light sources emit light of different colors; Determine a mapping relationship between the luminous flux of the monochromatic LED light source and a PWM signal output by a driving circuit corresponding to the monochromatic LED light source; When a driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, determining a temperature compensation coefficient representing a difference between a test luminous flux and a maximum luminous flux of the monochromatic LED light source at different test temperatures; 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 the 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; Determine a target PWM value at a real-time temperature according to the mapping relationship, the temperature compensation coefficient and the target luminous flux; 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. A light combining control method according to claim 1, characterized in that: Determining a 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 comprises the following steps: When the driving circuit of the monochromatic LED light source outputs an arbitrary PWM signal, obtaining a number of test PWM values ​​and corresponding test luminous fluxes; Normalizing the test luminous flux to obtain a normalized luminous flux; The normalized luminous flux and the corresponding test PWM value are fitted with coordinate points to obtain a mapping relationship between the luminous flux of the monochromatic LED light source and the PWM signal.

3. A light combining control method according to claim 2, characterized in that: The formula of the mapping relationship is expressed as: Dn=f(Φn / Φnmax), Among them, n represents the number of types of the monochromatic LED light sources, Φn represents the luminous flux of the nth monochromatic LED light source, Φnmax represents the maximum value of the nth monochromatic LED light source in the test luminous flux, and Dn represents the value corresponding to the PWM signal of the nth monochromatic LED light source.

4. A light combining control method according to claim 1, characterized in that: In the case where a driving circuit corresponding to the monochromatic LED light source is given a test PWM signal, determining a temperature compensation coefficient representing a difference between a test luminous flux and a maximum luminous flux of the monochromatic LED light source at different test temperatures comprises the following steps: Under a given test PWM signal, obtaining the test luminous flux of the monochromatic LED light source at different test temperatures, and obtaining the maximum luminous flux at a first temperature; Calculating the ratios between a number of the test luminous fluxes and the maximum luminous flux to obtain a number of luminous flux coefficients; The light flux coefficient and the corresponding test temperature are used to fit the coordinate points to obtain a temperature compensation coefficient.

5. A light combining control method according to claim 1, characterized in that: Acquiring 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, comprises the following steps: Acquire a first initial luminous flux of the monochromatic LED light source at a first temperature; Acquire a second initial luminous flux of the monochromatic LED light source at a 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 a first initial luminous flux and a second initial luminous flux.

6. A light combining control method according to claim 5, characterized in that: The formula for the target luminous flux is expressed as: Φn 目 =ΦnL-(ΦnL-ΦnH) / (T2-T1)*(Ti-T1), Among them, Φn 目 represents the target luminous flux of the nth monochromatic LED light source, ΦnL represents the first initial luminous flux of the nth monochromatic LED light source, ΦnH represents the second 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.

7. A light combining control method according to claim 6, characterized in that: The formula of the target PWM value is expressed as: Dni=f(Φn 目 / (Φnmax*ηi)) Wherein, Dni represents the target PWM value of the n-th monochromatic LED light source, and ηi represents the temperature compensation coefficient of the n-th monochromatic LED light source at the real-time temperature.

8. A light combining control device, characterized in that: include: A plurality of color driving modules, each of which is used to control a single-color LED light source; Temperature sensing module, used to detect real-time temperature; a light combining module connected to the temperature sensing module to receive the real-time temperature and obtain a target luminous flux according to the real-time temperature; A PWM module, connected to the light combining module, to receive the target luminous flux and obtain a target PWM value according to the target luminous flux; The control module is connected to the temperature sensing module to monitor the real-time temperature; and is also connected to the PWM module and a plurality of the color driving modules respectively to control the operation of the color driving modules according to the target PWM value.

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

10. A storage medium, the storage medium being a computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute: the method according to any one of claims 1 to 7.

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