Relative color temperature dynamic adjustment method and system, electronic device, and storage medium

Abstract

The application discloses a relative color temperature dynamic adjustment method and system, electronic equipment and a storage medium, and relates to the field of relative color temperature adjustment. The method comprises the following steps: acquiring a color coordinate, a relative color temperature and a luminous flux in an LED system; determining a first coefficient and a second coefficient according to the color coordinate, the relative color temperature and the luminous flux; the first coefficient is a coefficient between the relative color temperature and the color coordinate; the second coefficient is a coefficient between the luminous flux and the current; constructing an adjustable light model according to the color coordinate, the relative color temperature, the luminous flux, the first coefficient and the second coefficient; determining an adjusted current value according to a target color coordinate, a target relative color temperature and a target luminous flux in the LED system by using the adjustable light model; and the adjusted current value comprises an adjusted white light current value, an adjusted red light current value and an adjusted green light current value. The application can realize dynamic adjustment of the color temperature and improve the color rendering index.

Description

Technical Field

[0001] This invention relates to the field of relative color temperature adjustment, and in particular to a method, system, electronic device, and storage medium for dynamic adjustment of relative color temperature. Background Technology

[0002] Fluorescent white LEDs are currently widely used lighting sources, with their emitted spectrum covering most of the visible light region and exhibiting a certain degree of spectral continuity. For a single fluorescent white LED, due to its fixed white light spectral composition and large proportion of blue light, its relative color temperature (CCT) is not adjustable and is generally high. Furthermore, the insufficient spectral components in the red and green light bands result in a low color rendering index (CRI).

[0003] LED systems based on dual-color white LEDs are a common method for achieving tunable relative color temperature (CCT). They typically consist of two fluorescent white LEDs with low and high CCT values, allowing for a continuous variation of the total CCT from low to high. However, for a single white LED, regardless of whether it has a low or high CCT value, the problem of insufficient red and green spectra still exists, thus these systems cannot achieve a significant improvement in the color rendering index (CRI). Furthermore, tri-color LED systems composed of red, green, and blue LED chips can achieve tunable CCT by adjusting the spectral structure through individual control of the three LEDs. However, obtaining a high CRI remains difficult due to the relatively narrow half-width (FWHM) of each monochromatic spectrum.

[0004] To improve the color rendering properties of the spectrum and obtain mixed white light with a high color rendering index (CRI), multi-phosphor white LEDs based on blue GaN-based chips or near-ultraviolet chips can be used. However, in the packaging process of such LED devices, different types of phosphors need to be simultaneously cured in epoxy resin or silicone and then coated onto the same LED chip. Therefore, it is difficult to control the emission spectrum converted by a single phosphor, resulting in an untunable relative color temperature (CCT).

[0005] Clearly, for fluorescent white LEDs, how to achieve adjustable relative color temperature (CCT) and high color rendering index (CRI) white light is worth exploring. Summary of the Invention

[0006] The purpose of this invention is to provide a method, system, electronic device, and storage medium for dynamic adjustment of relative color temperature, so as to achieve dynamic adjustment of color temperature and improve color rendering index.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] A method for dynamic adjustment of relative color temperature includes:

[0009] Obtain the chromaticity coordinates, relative color temperature, and luminous flux of the LED system; the LED system includes white LEDs, green LEDs, and red LEDs;

[0010] A first coefficient and a second coefficient are determined based on the chromaticity coordinates, the relative color temperature, and the luminous flux; the first coefficient is the coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is the coefficient between the luminous flux and the current.

[0011] A tunable light model is constructed based on the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient, and the second coefficient.

[0012] The adjustable current value is determined using the tunable light model based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system; the adjusted current value includes the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value.

[0013] Optionally, the adjusted current value is determined using the tunable light model based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system, specifically including:

[0014] When the driving current of the white LED is not fixed, the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value are determined using the first tunable light model in the tunable light model based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux.

[0015] When the driving current of the white LED is fixed, the adjusted red light current value and the adjusted green light current value are determined using the second or third tunable light model in the tunable light model based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux.

[0016] Optionally, the expression for the first dimmable model is:

[0017]

[0018]

[0019]

[0020] Where, φ M (I W ,I R ,I G I represents the luminous flux of the mixed white light from the adjustable white, red, and green LED currents. W For white LED current, I R For the red LED current, I G For the green LED current, φW φ is the luminous flux of a white LED. R φ is the luminous flux of a red LED. G For the luminous flux of a green LED, β W1 and β W2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a white LED, respectively, β. R1 and β R2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a red LED, respectively, β. G1 and β G2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a green LED, respectively. M (I W ,I R ,I G The y-component of the chromaticity coordinates of the mixed white light from adjustable white, red, and green LED currents is given by y. W,0 Let y be the chromaticity coordinate of a white LED. R,0 Let y be the chromaticity coordinate of the red LED. G,0 For the chromaticity coordinate y-component of a green LED, CCT M (I W ,I R ,I G ) represents the relative color temperature of the mixed white light from the adjustable white, red, and green LED currents, and η is the first coefficient.

[0021] Optionally, the expression for the second dimmable model is:

[0022]

[0023]

[0024]

[0025] Where, φ M (I R ,I G φ represents the luminous flux of the mixed white light spectrum of the adjustable red and green LED currents. W，0 y represents the luminous flux of a white LED driven by a fixed current. M (I R ,I G ) represents the chromaticity coordinate y-component of the mixed white light spectrum of adjustable red and green LED currents. W,0 Let y be the chromaticity coordinate of a white LED. R,0 Let y be the chromaticity coordinate of the red LED. G,0 For the chromaticity coordinate y-component of a green LED, CCT M (IR ,I G The relative color temperature of the mixed white light spectrum of adjustable red and green LED currents.

[0026] Optionally, the expression for the third dimmable model is:

[0027]

[0028]

[0029]

[0030] Where, φ G,0 φ is the luminous flux of a green LED driven by a fixed current. R,0 This represents the luminous flux of a red LED driven by a fixed current.

[0031] The present invention also provides a relative color temperature dynamic adjustment system, comprising:

[0032] The acquisition module is used to acquire the chromaticity coordinates, relative color temperature, and luminous flux of the LED system; the LED system includes white LEDs, green LEDs, and red LEDs.

[0033] The first coefficient and second coefficient determination module is used to determine the first coefficient and the second coefficient based on the chromaticity coordinates, the relative color temperature, and the luminous flux; the first coefficient is the coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is the coefficient between the luminous flux and the current.

[0034] The construction module is used to construct a tunable light model based on the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient, and the second coefficient.

[0035] The adjusted current value determination module is used to determine the adjusted current value based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system using the tunable light model; the adjusted current value includes the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value.

[0036] Optionally, the module for determining the adjusted current value specifically includes:

[0037] The first adjustable current value determination unit is used to determine the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux using the first adjustable light model in the adjustable light model when the driving current of the white LED is not fixed.

[0038] The second adjustable current value determination unit is used to determine the adjusted red light current value and the adjusted green light current value based on the target chromaticity coordinates, the target relative color temperature and the target luminous flux using the second or third adjustable light model in the adjustable light model when the driving current of the white LED is fixed.

[0039] The present invention also provides an electronic device, comprising:

[0040] One or more processors;

[0041] A storage device on which one or more programs are stored;

[0042] When the one or more programs are executed by the one or more processors, the one or more processors implement the method described above.

[0043] The present invention also provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method as described above.

[0044] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0045] This invention obtains the chromaticity coordinates, relative color temperature, and luminous flux of an LED system. The LED system includes white LEDs, green LEDs, and red LEDs. A first coefficient and a second coefficient are determined based on the chromaticity coordinates, relative color temperature, and luminous flux. The first coefficient is the coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is the coefficient between the luminous flux and the current. An adjustable light model is constructed based on the chromaticity coordinates, relative color temperature, luminous flux, the first coefficient, and the second coefficient. An adjusted current value is determined using the adjustable light model based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system. The adjusted current value includes adjusted white light current, adjusted red light current, and adjusted green light current. This invention performs red / green spectral compensation using white LEDs, while simultaneously achieving adjustable relative color temperature and an effective improvement in the color rendering index. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 The flowchart shows the relative color temperature dynamic adjustment method provided by the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The purpose of this invention is to provide a method, system, electronic device, and storage medium for dynamic adjustment of relative color temperature, so as to achieve dynamic adjustment of color temperature and improve color rendering index.

[0050] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] like Figure 1 As shown, the present invention provides a method for dynamic adjustment of relative color temperature, comprising:

[0052] Step 101: Obtain the chromaticity coordinates, relative color temperature, and luminous flux of the LED system; the LED system includes white LEDs, green LEDs, and red LEDs.

[0053] Step 102: Determine a first coefficient and a second coefficient based on the chromaticity coordinates, the relative color temperature, and the luminous flux; the first coefficient is the coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is the coefficient between the luminous flux and the current.

[0054] There are interrelationships among the chromaticity coordinates, tristimulus values, correlated color temperature, and luminous flux of LED lighting sources. The spectral tristimulus values ​​(X, Y, Z) and chromaticity coordinates (x, y, z) are related as follows:

[0055]

[0056] Where X represents the spectral red primary color stimulus, Y represents the spectral green primary color stimulus, and Z represents the spectral blue primary color stimulus. x is the x-component of the chromaticity coordinate, y is the y-component of the chromaticity coordinate, and z is the z-component of the chromaticity coordinate. Since x + y + z = 1, formula (1) can be rewritten as follows:

[0057] or

[0058] Assume that the tristimulus values ​​of the spectrum of a fluorescent white LED, a red LED, and a green LED when lit individually are respectively (X... W ,Y W Z W ), (X R ,YR Z R ), (X G ,Y G Z G Let W represent a white LED, R represent a red LED, G represent a green LED, and M represent mixed light. Then, the tristimulus value (Xi) of the mixed spectrum after the three are superimposed is... M ,Y M Z M )for:

[0059]

[0060] Let (x) W ,y W ,z W ),(x R ,y R ,z R ) and (x G ,y G ,z G Let represent the chromaticity coordinates of white LED, red LED, and green LED, respectively. Then, the overall chromaticity coordinates of the mixed spectrum of the three can be expressed as:

[0061]

[0062]

[0063] Based on the light color characteristics of the light source, the stimulus value Y represents the brightness, which is usually proportional to the luminous flux, while the chromaticity coordinate y is approximately proportional to the relative color temperature CCT. Therefore, formula (5) can be rewritten as:

[0064]

[0065] Where φ W , φ R and φ G These represent the luminous flux of white LEDs, red LEDs, and green LEDs, respectively.

[0066] Therefore, the relative color temperature (CCT) of the mixed white light spectrum M It can be represented as:

[0067]

[0068] CCT M η represents the relative color temperature of the mixed white light spectrum; η represents the CCT of the mixed spectrum. M Its y-component of chromaticity coordinates M The proportionality coefficient between them is related to the electrothermal characteristics.

[0069] Step 103: Construct a tunable light model based on the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient, and the second coefficient.

[0070] Step 104: Based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system, determine the adjusted current value using the tunable light model; the adjusted current value includes the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value. The adjusted current value is used to achieve relative color temperature adjustment.

[0071] Step 104 specifically includes:

[0072] When the driving current of the white LED is not fixed, the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value are determined using the first tunable light model in the tunable light model based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux.

[0073] When the driving current of the white LED is fixed, the adjusted red light current value and the adjusted green light current value are determined using the second or third tunable light model in the tunable light model based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux.

[0074] The luminous flux of an LED φ v With its input power P d The following relationship exists between them:

[0075] φ v =E·P d (8)

[0076] Where E represents the luminous efficiency of the LED.

[0077] LED light sources are generally temperature sensitive; their luminous intensity decreases as temperature increases. This characteristic can be reflected in the linear relationship between luminous efficiency E and temperature, as shown in the following equation:

[0078] E=E0[1+k e (T j -T0)] (9)

[0079] Where E0 is the rated luminous efficiency at the rated temperature T0 (usually given as 25℃ in LED datasheets), T j K represents the junction temperature of the LED. e This represents the rate at which luminous efficiency decreases with increasing temperature.

[0080] In practical applications, when heat dissipation conditions are good, the thermal performance of an LED can be simplified to an equivalent model under thermal steady-state conditions, where the junction temperature T is... j It can be represented as:

[0081] T j =T hs +R jc P heat =T hs +R jc k h P d (10)

[0082] Where T hs R is the steady-state temperature of the heat sink. jc P represents the junction-to-case thermal resistance of the LED. heat k represents the heat dissipation of the LED. h The heat dissipation coefficient represents the proportion of electrical energy consumed as heat.

[0083] Combining formulas (8)-(10), we can obtain the luminous flux φ. v With power P d The relationship can be described as follows:

[0084]

[0085] In formula (11), the luminous flux φ v It is power P d The quadratic function, i.e., φ v =α1P d +α2P d 2 α1 and α2 are the coefficients of the first and second terms of the functional relationship between LED luminous flux and its power, respectively. Since under stable voltage, the power P... d With the injected current I d It is directly proportional. Therefore, the luminous flux φ v With current I d A similar relationship will also exist, namely φ v =β1I d +β2I d 2 β1 and β2 are the coefficients of the first and second terms of the functional relationship between LED luminous flux and its current, respectively. At this point, the mixed luminous flux φ... M It can be represented as

[0086]

[0087] As can be seen from the derivation of formula (12), for a single LED, there is a quadratic function relationship between its luminous flux and current. That is to say, for the white LED, red LED, and green LED here, respectively... The coefficients in each formula can be obtained by fitting a mathematical function. For example, for white LEDs... Solving for the coefficients in the equation: By measuring the luminous flux of a white LED under different currents, a series of current and luminous flux values ​​can be obtained. The coefficient β can then be obtained through function fitting. W1 and β W2 Red LEDs and green LEDs are similar.

[0088] Specifically, when the LED operating environment is favorable, the chromaticity coordinate y-component of individual white, red, and green LEDs changes little and can be treated as constant. Therefore, the chromaticity coordinate y-component of the mixed white light from the white, red, and green LEDs is... M and color temperature CCT M It can be described by the expressions for each current, as follows:

[0089]

[0090]

[0091] Formulas (12), (13), and (14) constitute the first dimmable model. φ M (I W ,I R ,I G I represents the luminous flux of the mixed white light from the adjustable white, red, and green LED currents. W For white LED current, I R For the red LED current, I G For the green LED current, φ W φ is the luminous flux of a white LED. R φ is the luminous flux of a red LED. G For the luminous flux of a green LED, β W1 and β W2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a white LED, respectively, β. R1 and β R2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a red LED, respectively, β. G1 and β G2 These are the coefficients of the first and second terms of the functional relationship between the luminous flux and current of a green LED, respectively. M (I W ,I R ,I G The y-component of the chromaticity coordinates of the mixed white light from adjustable white, red, and green LED currents is given by y. W,0 Let y be the chromaticity coordinate of a white LED. R,0 Let y be the chromaticity coordinate of the red LED. G,0 For the chromaticity coordinate y-component of a green LED, CCTM (I W ,I R ,I G ) represents the relative color temperature of the mixed white light from the adjustable white, red, and green LED currents, and η is the first coefficient.

[0092] Specifically, to avoid increasing the blue light hazard caused by the blue light spectrum, the driving state of the white LED can be kept unchanged, and the relative color temperature (CCT) and color rendering index (CRI) can be improved only by adjusting the red and green LEDs. Furthermore, tests have shown that the chromaticity coordinate y-component of the red and green LEDs changes little in actual operation and can be considered constant under certain conditions. Therefore, formulas (12), (13), and (14) can be rewritten as follows:

[0093]

[0094]

[0095]

[0096] Formulas (15), (16), and (17) constitute the second dimmable model. φ M (I R ,I G φ represents the luminous flux of the mixed white light spectrum of the adjustable red and green LED currents. W，0 y represents the luminous flux of a white LED driven by a fixed current. M (I R ,I G ) represents the chromaticity coordinate y-component of the mixed white light spectrum of adjustable red and green LED currents. W,0 Let y be the chromaticity coordinate of a white LED. R,0 Let y be the chromaticity coordinate of the red LED. G,0 For the chromaticity coordinate y-component of a green LED, CCT M (I R ,I G ) represents the relative color temperature of the mixed white light spectrum of the adjustable red and green LED currents.

[0097] In addition, formula (17) can also be transformed into current I by mathematical transformation. R The polynomial and current I G The form of polynomial multiplication is as follows:

[0098]

[0099] Formulas (15), (16), and (18) constitute the third dimmable model. φ G,0 φ is the luminous flux of a green LED driven by a fixed current.R,0 This represents the luminous flux of a red LED driven by a fixed current.

[0100] Based on the above analysis and derivation, two tunable light models for fluorescent white LEDs under spectral compensation can be obtained:

[0101] The first dimmable model is achieved by adjusting the current of the white LED, red LED, and green LED; the second or third dimmable model is achieved by adjusting the current of the red LED and green LED.

[0102] Existing white LED devices or systems struggle to achieve both adjustable relative color temperature (CCT) and a high color rendering index (CRI) in mixed white light. For example, while dual-color white LED systems can achieve adjustable CCT, the improvement in CRI is limited; multi-phosphor white LEDs can achieve a high CRI but lack adjustable CCT. The spectral-compensated phosphor-based white LED system and its tunable light model described in this invention improve the continuity and uniformity of the overall mixed spectrum by compensating for red and green light from individual phosphor-based white LEDs, effectively increasing the potential for CRI improvement. Furthermore, since red and green light are compensated by independently controlled red and green LEDs respectively, the compensation intensity can be changed by altering the LED injection current, thereby achieving dynamic adjustment of the relative color temperature (CCT). This invention offers advantages such as simple structure, adjustable relative color temperature (CCT), and a large adjustment range for CRI.

[0103] The present invention also provides a relative color temperature dynamic adjustment system, comprising:

[0104] The acquisition module is used to acquire the chromaticity coordinates, relative color temperature, and luminous flux of the LED system; the LED system includes white LEDs, green LEDs, and red LEDs.

[0105] The first coefficient and second coefficient determination module is used to determine the first coefficient and the second coefficient based on the chromaticity coordinates, the relative color temperature, and the luminous flux; the first coefficient is the coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is the coefficient between the luminous flux and the current.

[0106] A construction module is used to construct a tunable light model based on the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient, and the second coefficient.

[0107] The adjusted current value determination module is used to determine the adjusted current value based on the target chromaticity coordinates, target relative color temperature, and target luminous flux in the LED system using the tunable light model; the adjusted current value includes the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value.

[0108] As an optional implementation, the adjusted current value determination module specifically includes:

[0109] The first adjustable current value determination unit is used to determine the adjusted white light current value, the adjusted red light current value, and the adjusted green light current value based on the target chromaticity coordinates, the target relative color temperature, and the target luminous flux using the first adjustable light model in the adjustable light model when the driving current of the white LED is not fixed.

[0110] The second adjustable current value determination unit is used to determine the adjusted red light current value and the adjusted green light current value based on the target chromaticity coordinates, the target relative color temperature and the target luminous flux using the second or third adjustable light model in the adjustable light model when the driving current of the white LED is fixed.

[0111] The present invention also provides an electronic device, comprising:

[0112] One or more processors.

[0113] A storage device on which one or more programs are stored.

[0114] When the one or more programs are executed by the one or more processors, the one or more processors implement the method described above.

[0115] The present invention also provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method as described above.

[0116] This invention achieves adjustable relative color temperature (CCT) and effective improvement of color rendering index (CRI) by compensating the red / green spectrum of a fluorescent white LED. The system has a simple structure, consisting of a fluorescent white LED, a red LED, and a green LED, all of which can be driven independently. Furthermore, a corresponding tunable light model is proposed based on spectral colorimetry and the basic photoelectric thermal (PET) theory of LEDs. This invention: 1) uses a monochromatic red / green LED for spectral compensation for a single fluorescent white LED, resulting in a simple structure; 2) allows for independent control of the driving states of the white, red, and green LEDs, thereby achieving dynamic adjustment of the relative color temperature (CCT) and improving the CRI over a wide range; 3) establishes a tunable light model for the system based on spectral colorimetry and the basic photoelectric thermal (PET) theory of LEDs.

[0117] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0118] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method of dynamically adjusting a relative color temperature, the method comprising: The method comprises the following steps: Obtaining chromaticity coordinates, relative color temperature and luminous flux in an LED system; the LED system comprises white light LEDs, green light LEDs and red light LEDs; Determining first and second coefficients according to the chromaticity coordinates, the relative color temperature and the luminous flux; the first coefficient is a coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is a coefficient between the luminous flux and the current; Constructing an adjustable light model according to the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient and the second coefficient; Determining an adjusted current value according to a target chromaticity coordinate, a target relative color temperature and a target luminous flux in the LED system by using the adjustable light model; the adjusted current value comprises an adjusted white light current value, an adjusted red light current value and an adjusted green light current value.

2. The relative color temperature dynamic adjustment method of claim 1, wherein, Determining an adjusted current value according to a target chromaticity coordinate, a target relative color temperature and a target luminous flux in the LED system by using the adjustable light model, specifically comprising: When the driving current of the white light LEDs is not fixed, determining an adjusted white light current value, an adjusted red light current value and an adjusted green light current value according to the target chromaticity coordinate, the target relative color temperature and the target luminous flux by using a first adjustable light model in the adjustable light model; When the driving current of the white light LEDs is fixed, determining an adjusted red light current value and an adjusted green light current value according to the target chromaticity coordinate, the target relative color temperature and the target luminous flux by using a second adjustable light model or a third adjustable light model in the adjustable light model.

3. The relative color temperature dynamic adjustment method of claim 2, wherein, The expression of the first adjustable light model is: wherein φ M (I W ,I R ,I G ) is the luminous flux of the mixed white light of the adjustable white, red and green LED currents, I W is the white light LED current, I R is the red light LED current, I G is the green light LED current, φ W is the white light LED luminous flux, φ R is the red light LED luminous flux, φ G is the green light LED luminous flux, β W1 and β W2 are respectively the first order coefficient and the second order coefficient of the functional relationship between the white light LED luminous flux and its current, β R1 and β R2 are respectively the first order coefficient and the second order coefficient of the functional relationship between the red light LED luminous flux and its current, β G1 and β G2 are respectively the first order coefficient and the second order coefficient of the functional relationship between the green light LED luminous flux and its current, y M (I W ,I R ,I G ) is the y component of the chromaticity coordinate of the mixed white light of the adjustable white, red and green LED currents, y W,0 is the y component of the chromaticity coordinate of the white light LED, y R,0 is the y component of the chromaticity coordinate of the red light LED, y G,0 is the y component of the chromaticity coordinate of the green light LED, CCT M (I W ,I R ,I G ) is the relative color temperature of the mixed white light of the adjustable white, red and green LED currents, and η is the first coefficient.

4. The relative color temperature dynamic adjustment method of claim 3, wherein, The expression of the second adjustable light model is: wherein φ M (I R ,I G ) is the luminous flux of the mixed white light spectrum of the adjustable red and green LED currents, φ W，0 is the luminous flux of the white light LED at a fixed current drive, y M (I R ,I G ) is the y component of the chromaticity coordinate of the mixed white light spectrum of the adjustable red and green LED currents, y W,0 is the y component of the chromaticity coordinate of the white light LED, y R,0 is the y component of the chromaticity coordinate of the red light LED, y G,0 is the y component of the chromaticity coordinate of the green light LED, CCT M (I R ,I G ) is the relative color temperature of the mixed white light spectrum of the adjustable red and green LED currents.

5. The relative color temperature dynamic adjustment method of claim 4, wherein, The expression of the third adjustable light model is: wherein φ G,0 is the luminous flux of the green LED under fixed current driving, and φ R,0 is the luminous flux of the red LED under fixed current driving.

6. A relative color temperature dynamic adjustment system, characterized by, The method comprises the following steps: An obtaining module is configured to obtain chromaticity coordinates, relative color temperature and luminous flux in an LED system; the LED system comprises white light LEDs, green light LEDs and red light LEDs; A first and second coefficient determining module is configured to determine first and second coefficients according to the chromaticity coordinates, the relative color temperature and the luminous flux; the first coefficient is a coefficient between the relative color temperature and the chromaticity coordinates; the second coefficient is a coefficient between the luminous flux and the current; A constructing module is configured to construct an adjustable light model according to the chromaticity coordinates, the relative color temperature, the luminous flux, the first coefficient and the second coefficient; An adjusted current value determining module is configured to determine an adjusted current value according to a target chromaticity coordinate, a target relative color temperature and a target luminous flux in the LED system by using the adjustable light model; the adjusted current value comprises an adjusted white light current value, an adjusted red light current value and an adjusted green light current value.

7. The relative color temperature dynamic adjustment system of claim 6, wherein, The adjusted current value determining module specifically comprises: A first adjusted current value determining unit is configured to, when the driving current of the white light LEDs is not fixed, determine an adjusted white light current value, an adjusted red light current value and an adjusted green light current value according to the target chromaticity coordinate, the target relative color temperature and the target luminous flux by using a first adjustable light model in the adjustable light model; The second adjusted current value determination unit is configured to determine an adjusted red light current value and an adjusted green light current value according to the target color coordinate, the target relative color temperature and the target luminous flux by using a second adjustable light model or a third adjustable light model in the adjustable light model when the driving current of the white light LED is fixed.

8. An electronic device, comprising: comprising: one or more processors; a memory device having stored thereon one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 5.

9. A storage medium, characterized by a computer program is stored thereon, wherein the computer program is executed by a processor to implement the method according to any one of claims 1 to 5.

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