LED high-temperature protection method

Abstract

The LED high-temperature protection method is characterized by comprising the following steps: 1, constructing an LED high-temperature protection system; 2, writing the initial parameter value into an LED driver IC1; 3, the LED driver IC1 obtains the current temperature, the current temperature is compared with the temperature threshold value, and if the current temperature value is larger than or equal to the temperature threshold value; 4, acquiring the RGB duty ratio of the current atmosphere lamp, and calculating the relative proportion of the current atmosphere lamp; 5, the current temperature change rate is obtained through calculation, the current temperature change rate is compared with a temperature change rate threshold value, if the current temperature change rate is larger than or equal to the temperature change rate threshold value, the step 6 is executed, and otherwise, the step 7 is executed; 6, adopting beta to adjust the relative proportion step length of the current atmosphere lamp; 7, gamma is adopted to adjust the relative proportion step length of the current atmosphere lamp; 8, calculating the relative proportion of the adjusted current atmosphere lamp; and 9, updating the relative proportion of the current atmosphere lamp by adopting the smoothing coefficient, calculating to obtain the RGB duty ratio output of the atmosphere lamp, and entering the step 3. The effect is that the light-emitting proportion and temperature of the vehicle-mounted atmosphere lamp can be rapidly adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of LEDs, and in particular to a high-temperature protection method for LEDs. Background Art

[0002] According to the characteristics of wavelength and energy, red light has a longer wavelength. In the visible light range, the longer the wavelength, the lower the photon energy. According to the inverse relationship between the energy of light and its wavelength, photons with lower energy are more likely to be converted into heat energy after being absorbed by an object, thereby increasing the temperature of the object. In contrast, light with shorter wavelengths, such as blue light and green light, has higher photon energy. After being absorbed, a relatively large proportion of them are converted into other forms of energy, while a relatively small proportion are converted into heat energy. When the brightness perceived by the human eye is the same, red light is more likely to increase the temperature of an object due to its own wavelength and energy characteristics, as well as the absorption characteristics of the material.

[0003] Disadvantages of existing technology: Existing vehicle atmosphere lights are usually composed of red, green and blue LED lamp beads. However, due to the wavelength and energy characteristics of red light itself, as well as the absorption characteristics of the material, it is easy to cause the temperature of objects to rise; at the same time, the higher the temperature, the brighter the red LED light, and the more heat is generated, making the vehicle atmosphere lights prone to problems such as thermal flicker, uneven light emission, and high heat generation, which seriously affects the service life and use effect of the vehicle atmosphere lights. Summary of the invention

[0004] The present invention provides an LED high temperature protection method, which can fine-tune the luminous ratio of different colors of vehicle-mounted ambient lights in a short time and quickly reduce the temperature of the ambient lights, and the color brightness changes smoothly and without abrupt changes, and the LED does not flicker suddenly.

[0005] To achieve the above-mentioned purpose, the present invention provides a method for high temperature protection of LEDs, the key of which is:

[0006] Step 1: construct an LED high temperature protection system, wherein the LED high temperature protection system is provided with an MCU controller, the MCU controller is connected to an LED driver IC1, the LED driver IC1 has a built-in temperature sensor, and the LED driver IC1 is provided with three LED driving ends, the three LED driving ends are connected to the cathodes of the red, green and blue LED lamp beads in one-to-one correspondence, and the anode of the LED lamp beads is connected to the power supply;

[0007] Step 2: By comparing the color values, the MCU controller is used to write the initial parameter values ​​into the LED driver, and the parameter values ​​of the LED driver IC1 are initialized;

[0008] Step 3: The LED driver IC1 obtains the current temperature value T_current;

[0009] Step 4: the LED driver IC1 compares the current temperature value T_current with the temperature threshold value T_threshold. If the current temperature value T_current ≥ the temperature threshold value T_threshold, the current ambient light is in a high temperature state, and the process goes to step 5; otherwise, the current ambient light is in a normal temperature state, and the process goes to step 11;

[0010] Step 5: The LED driver IC1 obtains the RGB duty cycle of the current atmosphere light, and calculates the relative proportion of the current atmosphere light according to the RGB duty cycle;

[0011] Step 6: The LED driver IC1 calculates the current temperature change rate ΔT / t according to the current temperature value T_current and the previous temperature value T_pre, and then compares the current temperature change rate ΔT / t with the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 7; otherwise, proceed to step 8.

[0012] ΔT=|Current temperature - last temperature value|

[0013] Step 7: If the temperature rises quickly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 9;

[0014] Step 8: If the temperature rises slowly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 9;

[0015] Step 9: Calculate the relative proportion of the adjusted current atmosphere light;

[0016] Step 10: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light, and calculate the RGB duty cycle output of the atmosphere light according to the updated relative proportion of the current atmosphere light, and then go to step 3;

[0017] Step 11: The LED driver IC1 determines whether the current temperature value T_current has recovered from high temperature to normal temperature based on the previous temperature value T_pre. If it has recovered from high temperature to normal temperature, proceed to step 12; otherwise, proceed to step 16;

[0018] Step 12: Determine whether the current temperature change rate ΔT / t is greater than or equal to the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 14; otherwise, proceed to step 13.

[0019] Step 13: If the temperature is within the normal temperature range but the temperature rises slowly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 15;

[0020] Step 14: If the temperature is within the normal temperature range but rises quickly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 15;

[0021] Step 15: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light, and calculate the RGB duty cycle output of the atmosphere light according to the updated relative proportion of the current atmosphere light, and then go to step 3;

[0022] Step 16: Keep the ambient light at normal temperature and go to step 3.

[0023] Through the above design, the temperature information of LED driver IC1 is obtained in real time through the built-in temperature sensor of LED driver IC1. Since the distance of LED driver IC1 is relatively close, the temperature of LED driver IC1 is equivalent to the temperature of the atmosphere lamp. By comparing the current temperature value with the temperature threshold, the temperature state of the atmosphere lamp is judged. When the atmosphere lamp is in a high temperature state, the color and temperature of the atmosphere lamp are adjusted by adjusting the RGB duty cycle of LED driver IC1. By comparing the current temperature change rate with the temperature change rate threshold, the temperature rise speed is judged, and then the corresponding step adjustment coefficient is selected to achieve more precise adjustment.

[0024] In a short period of time, the light emission ratios of different colors of the vehicle's ambient light were fine-tuned, and the temperature of the ambient light was quickly reduced. At the same time, a smoothing coefficient was used for linear interpolation calculations to ensure that the transition of the ambient light's color brightness was smooth, natural, and not abrupt, and that the LED would not flicker suddenly, effectively improving the service life and display effect of the ambient light.

[0025] Preferably, in step 2, the initial parameter values ​​include: initial relative proportion adjustment step ΔRp, ΔGp, ΔBp; smoothing coefficient K; temperature change rate threshold α; step adjustment coefficients β and γ, β>1, 0<γ<1; fixed time interval t for obtaining temperature; and temperature threshold T_threshold.

[0026] The specific values ​​of K, α, β, γ, and t in the initial parameter values ​​come from historical project experience and measured data.

[0027] Preferably, in step 5, the relative proportion calculation expression of the current atmosphere light is as follows:

[0028] Rp_current=Rd / Td

[0029] Gp_current=Gd / Td

[0030] Bp_current=Bd / Td

[0031] Td=Rd+Gd+Bd

[0032] Among them, Rd represents the duty cycle of the red LED lamp beads, Gd represents the duty cycle of the green LED lamp beads, Bd represents the duty cycle of the blue LED lamp beads, Rp_current represents the relative proportion of the red LED lamp beads, Gp_current represents the relative proportion of the green LED lamp beads, and Bp_current represents the relative proportion of the blue LED lamp beads.

[0033] Preferably, in step 7, the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and the expression is as follows:

[0034] ΔRp′=ΔRp*β

[0035] ΔGp′=ΔGp*β

[0036] ΔBp′=ΔBp*β

[0037] Wherein, ΔRp represents the initial red light relative proportion adjustment step, ΔGp represents the initial green light relative proportion adjustment step, and ΔBp represents the initial blue light relative proportion adjustment step;

[0038] In step 8, the relative proportional step of the current ambient light is adjusted using the step adjustment coefficient γ, which is expressed as follows:

[0039] ΔRp′=ΔRp*γ

[0040] ΔGp′=ΔGp*γ

[0041] ΔBp′=ΔBp*γ.

[0042] Preferably, in step 9, the output value of the current ambient light after adjustment is calculated, and the expression is as follows:

[0043] The relative proportion of red light: Rp_new = Rp_current - ΔRp′, and ensure that Rp_new>0; the relative proportion of green light: Gp_new = Gp_current + ΔGp′, and ensure that Gp_new<1; the relative proportion of blue light: Bp_new = Bp_current + ΔBp′, and ensure that Bp_new<1;

[0044] Check whether Rp_new+Gp_new+Bp_new=1 is true. If true, go to step 10; if not, perform normalization and then go to step 10;

[0045] The normalized expression is as follows:

[0046] Rp_new=Rp_new / (Rp_new+Gp_new+Bp_new)

[0047] Gp_new=Gp_new / (Rp_new+Gp_new+Bp_new)

[0048] Bp_new=Bp_new / (Rp_new+Gp_new+Bp_new).

[0049] After normalization, Rp_new+Gp_new+Bp_new=1.

[0050] Preferably, in step 10, a linear interpolation calculation is performed using a smoothing coefficient K to obtain an updated relative proportion of the current atmosphere light, which is expressed as follows:

[0051] Rp_update=Rp_current+K*(Rp_new-Rp_current)

[0052] Gp_update=Gp_current+K*(Gp_new-Gp_current)

[0053] Bp_update=Bp_current+K*(Bp_new-Bp_current)

[0054] The RGB duty cycle output expression of the atmosphere light is as follows:

[0055] Duty cycle of red light: Rd_new = Rp_update / Td

[0056] Green light duty cycle: Gd_new = Gp_update / Td

[0057] Duty cycle of blue light: Bd_new=Bp_update / Td.

[0058] Preferably: a filter circuit is provided between the MUC controller and the LED driver IC1, the filter circuit is provided with a magnetic bead FB1, the front end of the magnetic bead FB1 is connected to the signal output end of the MUC controller, the front end of the magnetic bead FB1 is also connected in series with a bidirectional voltage regulator diode ESD1 and then grounded, the rear end of the magnetic bead FB1 is connected to the signal input end of the LED driver IC1, the rear end of the magnetic bead FB1 is also connected in series with a capacitor C5 and then grounded.

[0059] The filtering circuit is used for filtering and removing interference signals, thereby improving the signal transmission quality between the MUC controller and the LED driver IC1.

[0060] Preferably: a power protection circuit is provided between the atmosphere lamp and the power supply, and the power protection circuit is provided with a resistor R1, the front end of the resistor R1 is connected to the power supply, the front end of the resistor R1 is connected in series with capacitors C3 and C4 in sequence and then grounded, the rear end of the resistor R1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the anode of the atmosphere lamp, and the rear end of the resistor R1 is connected in series with capacitor C2 and then grounded.

[0061] The power protection circuit is used to prevent reverse connection, protect the safety of the atmosphere lamp, and ensure continuous and stable power input for the atmosphere lamp.

[0062] Preferably, in step 1, the LED driver IC1 is an INDIE83212D14 chip.

[0063] The beneficial effects of the present invention are as follows: the luminous ratio of different colors of the vehicle-mounted ambient light can be fine-tuned in a short time, and the temperature of the ambient light can be quickly reduced; the color brightness changes smoothly and without abrupt changes, and the LED does not flicker suddenly, thereby effectively improving the service life and display effect of the ambient light. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 is a flow chart of the present invention;

[0065] Figure 2 This is a circuit diagram of the LED driver IC1 in the embodiment;

[0066] Figure 3 A filter circuit diagram in the embodiment;

[0067] Figure 4 FIG. 4 is a power protection circuit diagram in an embodiment. DETAILED DESCRIPTION

[0068] The present invention is further described in detail below in conjunction with the accompanying drawings and specific examples. The following examples or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0069] like Figure 1 As shown: A method for high temperature protection of LED, comprising the following steps:

[0070] Step 1: construct an LED high temperature protection system, wherein the LED high temperature protection system is provided with an MCU controller, the MCU controller is connected to an LED driver IC1, the LED driver IC1 has a built-in temperature sensor, and the LED driver IC1 is provided with three LED driving ends, the three LED driving ends are connected to the cathodes of the red, green and blue LED lamp beads in one-to-one correspondence, and the anode of the LED lamp beads is connected to the power supply;

[0071] Step 2: By comparing the color values, the MCU controller is used to write the initial parameter values ​​into the LED driver, and the LED driver IC1 parameter values ​​are initialized. The initial parameter values ​​include: initial relative proportion adjustment step ΔRp, ΔGp, ΔBp; smoothing coefficient K; temperature change rate threshold α; step adjustment coefficients β and γ, β>1, 0<γ<1; fixed time interval t for obtaining temperature; temperature threshold T_threshold;

[0072] Step 3: The LED driver IC1 obtains the current temperature value T_current;

[0073] Step 4: the LED driver IC1 compares the current temperature value T_current with the temperature threshold value T_threshold. If the current temperature value T_current ≥ the temperature threshold value T_threshold, the current ambient light is in a high temperature state, and the process goes to step 5; otherwise, the current ambient light is in a normal temperature state, and the process goes to step 11;

[0074] Step 5: The LED driver IC1 obtains the RGB duty cycle of the current atmosphere light, and calculates the relative proportion of the current atmosphere light according to the RGB duty cycle. The expression is as follows:

[0075] Rp_current=Rd / Td

[0076] Gp_current=Gd / Td

[0077] Bp_current=Bd / Td

[0078] Td=Rd+Gd+Bd

[0079] Among them, Rd represents the duty cycle of the red LED lamp beads, Gd represents the duty cycle of the green LED lamp beads, Bd represents the duty cycle of the blue LED lamp beads, Rp_current represents the relative proportion of the red LED lamp beads, Gp_current represents the relative proportion of the green LED lamp beads, and Bp_current represents the relative proportion of the blue LED lamp beads;

[0080] Step 6: The LED driver IC1 calculates the current temperature change rate ΔT / t according to the current temperature value T_current and the previous temperature value T_pre, and then compares the current temperature change rate ΔT / t with the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 7; otherwise, proceed to step 8.

[0081] Step 7: If the temperature rises quickly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 9;

[0082] The relative proportional step length expression of the current atmosphere light is adjusted by using the step length adjustment coefficient β as follows:

[0083] ΔRp′=ΔRp*β

[0084] ΔGp′=ΔGp*β

[0085] ΔBp′=ΔBp*β

[0086] Wherein, ΔRp represents the initial red light relative proportion adjustment step, ΔGp represents the initial green light relative proportion adjustment step, and ΔBp represents the initial blue light relative proportion adjustment step;

[0087] Step 8: If the temperature rises slowly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 9;

[0088] The step adjustment coefficient γ is used to adjust the relative proportional step of the current atmosphere light. The expression is as follows:

[0089] ΔRp′=ΔRp*γ

[0090] ΔGp′=ΔGp*γ

[0091] ΔBp′=ΔBp*γ

[0092] Step 9: Calculate the relative proportion of the current ambient light after adjustment, the expression is as follows: relative proportion of red light: Rp_new=Rp_current-ΔRp′, and ensure that Rp_new>0; relative proportion of green light: Gp_new=Gp_current+ΔGp′, and ensure that Gp_new<1; relative proportion of blue light: Bp_new=Bp_current+ΔBp′, and ensure that Bp_new<1;

[0093] Check whether Rp_new+Gp_new+Bp_new=1 is true. If true, go to step 10; if not, perform normalization and then go to step 10;

[0094] The normalized expression is as follows:

[0095] Rp_new=Rp_new / (Rp_new+Gp_new+Bp_new)

[0096] Gp_new=Gp_new / (Rp_new+Gp_new+Bp_new)

[0097] Bp_new=Bp_new / (Rp_new+Gp_new+Bp_new)

[0098] Step 10: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light. The expression is as follows:

[0099] Rp_update=Rp_current+K*(Rp_new-Rp_current)

[0100] Gp_update=Gp_current+K*(Gp_new-Gp_current)

[0101] Bp_update=Bp_current+K*(Bp_new-Bp_current)

[0102] The RGB duty cycle output of the atmosphere light is calculated according to the updated relative ratio of the current atmosphere light, and the process goes to step 3. The RGB duty cycle output expression of the atmosphere light is as follows:

[0103] Duty cycle of red light: Rd_new = Rp_update / Td

[0104] Green light duty cycle: Gd_new = Gp_update / Td

[0105] Duty cycle of blue light: Bd_new=Bp_update / Td.

[0106] Step 11: The LED driver IC1 determines whether the current temperature value T_current has recovered from high temperature to normal temperature based on the previous temperature value T_pre. If it has recovered from high temperature to normal temperature, proceed to step 12; otherwise, proceed to step 16;

[0107] Step 12: Determine whether the current temperature change rate ΔT / t is greater than or equal to the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 14; otherwise, proceed to step 13.

[0108] Step 13: If the temperature is within the normal temperature range but the temperature rises slowly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 15;

[0109] Step 14: If the temperature is within the normal temperature range but rises quickly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 15;

[0110] Step 15: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light, and calculate the RGB duty cycle output of the atmosphere light according to the updated relative proportion of the current atmosphere light, and then go to step 3;

[0111] Step 16: Keep the ambient light at normal temperature and go to step 3.

[0112] like Figure 2 , Figure 3 As shown: a filter circuit is arranged between the MUC controller and the LED driver IC1, and the filter circuit is provided with a magnetic bead FB1, a front end of the magnetic bead FB1 is connected to the signal output end of the MUC controller, a front end of the magnetic bead FB1 is connected in series with a bidirectional voltage regulator diode ESD1 and then grounded, a rear end of the magnetic bead FB1 is connected to the signal input end of the LED driver IC1, and a rear end of the magnetic bead FB1 is connected in series with a capacitor C5 and then grounded.

[0113] like Figure 2 , Figure 4 As shown: a power protection circuit is provided between the atmosphere lamp and the power supply, and the power protection circuit is provided with a resistor R1, the front end of the resistor R1 is connected to the power supply, the front end of the resistor R1 is connected in series with capacitors C3 and C4 in sequence and then grounded, the rear end of the resistor R1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the anode of the atmosphere lamp, and the rear end of the resistor R1 is connected in series with capacitor C2 and then grounded.

[0114] In this embodiment, the LED driver IC1 adopts the INDIE83212D14 chip.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for protecting LED from high temperature, characterized in that: The following steps are involved: Step 1: construct an LED high temperature protection system, wherein the LED high temperature protection system is provided with an MCU controller, the MCU controller is connected to an LED driver IC1, the LED driver IC1 has a built-in temperature sensor, and the LED driver IC1 is provided with three LED driving ends, the three LED driving ends are connected to the cathodes of the red, green and blue LED lamp beads in one-to-one correspondence, and the anode of the LED lamp beads is connected to the power supply; Step 2: Initializing the parameter values ​​of the LED driver IC1 to obtain initial parameter values; Step 3: The LED driver IC1 obtains the current temperature value T_current; Step 4: the LED driver IC1 compares the current temperature value T_current with the temperature threshold value T_threshold. If the current temperature value T_current ≥ the temperature threshold value T_threshold, the current ambient light is in a high temperature state, and the process goes to step 5; otherwise, the current ambient light is in a normal temperature state, and the process goes to step 11; Step 5: The LED driver IC1 obtains the RGB duty cycle of the current atmosphere light, and calculates the relative proportion of the current atmosphere light according to the RGB duty cycle; Step 6: The LED driver IC1 calculates the current temperature change rate ΔT / t according to the current temperature value T_current and the previous temperature value T_pre, and then compares the current temperature change rate ΔT / t with the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 7; otherwise, proceed to step 8. Step 7: If the temperature rises quickly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 9; Step 8: If the temperature rises slowly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 9; Step 9: Calculate the relative proportion of the adjusted current atmosphere light; Step 10: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light, and calculate the RGB duty cycle output of the atmosphere light according to the updated relative proportion of the current atmosphere light, and then go to step 3; Step 11: The LED driver IC1 determines whether the current temperature value T_current has recovered from high temperature to normal temperature based on the previous temperature value T_pre. If it has recovered from high temperature to normal temperature, proceed to step 12; otherwise, proceed to step 16; Step 12: Determine whether the current temperature change rate ΔT / t is greater than or equal to the temperature change rate threshold α. If the current temperature change rate ΔT / t ≥ the temperature change rate threshold α, proceed to step 14; otherwise, proceed to step 13. Step 13: If the temperature is within the normal temperature range but the temperature rises slowly, a large proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient β, and then the process goes to step 15; Step 14: If the temperature is within the normal temperature range but rises quickly, a small proportional step adjustment is implemented, and the relative proportional step of the current atmosphere light is adjusted using the step adjustment coefficient γ, and then the process goes to step 15; Step 15: Use the smoothing coefficient K to perform linear interpolation calculation to obtain the updated relative proportion of the current atmosphere light, and calculate the RGB duty cycle output of the atmosphere light according to the updated relative proportion of the current atmosphere light, and then go to step 3; Step 16: Keep the ambient light at normal temperature and go to step 3.

2. The LED high temperature protection method according to claim 1, characterized in that: In step 2, the initial parameter values ​​include: initial relative proportion adjustment step ΔRp, ΔGp, ΔBp; smoothing coefficient K; temperature change rate threshold α; step adjustment coefficients β and γ, β>1, 0<γ<1; fixed time interval t for obtaining temperature; temperature threshold T_threshold.

3. The LED high temperature protection method according to claim 1, characterized in that: In step 5, the relative proportion calculation expression of the current ambient light is as follows: Rp_current=Rd / Td Gp_current=Gd / Td Bp_current=Bd / Td Td=Rd+Gd+Bd Among them, Rd represents the duty cycle of the red LED lamp beads, Gd represents the duty cycle of the green LED lamp beads, Bd represents the duty cycle of the blue LED lamp beads, Rp_current represents the relative proportion of the red LED lamp beads, Gp_current represents the relative proportion of the green LED lamp beads, and Bp_current represents the relative proportion of the blue LED lamp beads.

4. The LED high temperature protection method according to claim 1, characterized in that: In step 7, the relative proportional step of the current ambient light is adjusted using the step adjustment coefficient β, and the expression is as follows: ΔRp′=ΔRp*β ΔGp′=ΔGp*β ΔBp′=ΔBp*β Wherein, ΔRp represents the initial red light relative proportion adjustment step, ΔGp represents the initial green light relative proportion adjustment step, and ΔBp represents the initial blue light relative proportion adjustment step; In step 8, the relative proportional step of the current ambient light is adjusted using the step adjustment coefficient γ, which is expressed as follows: ΔRp′=ΔRp*γ ΔGp′=ΔGp*γ ΔBp′=ΔBp*γ.

5. The LED high temperature protection method according to claim 1, characterized in that: In step 9, the output value of the current ambient light after adjustment is calculated, and the expression is as follows: relative proportion of red light: Rp_new=Rp_current-ΔRp′, and ensure that Rp_new>0; relative proportion of green light: Gp_new=Gp_current+ΔGp′, and ensure that Gp_new<1; relative proportion of blue light: Bp_new=Bp_current+ΔBp′, and ensure that Bp_new<1; Check whether Rp_new+Gp_new+Bp_new=1 is true. If true, go to step 10; if not, perform normalization and then go to step 10; The normalized expression is as follows: Rp_new=Rp_new / (Rp_new+Gp_new+Bp_new) Gp_new=Gp_new / (Rp_new+Gp_new+Bp_new) Bp_new=Bp_new / (Rp_new+Gp_new+Bp_new).

6. The LED high temperature protection method according to claim 1, characterized in that: In step 10, a linear interpolation calculation is performed using a smoothing coefficient K to obtain an updated relative proportion of the current ambient light, which is expressed as follows: Rp_update=Rp_current+K*(Rp_new-Rp_current) Gp_update=Gp_current+K*(Gp_new-Gp_current) Bp_update=Bp_current+K*(Bp_new-Bp_current) The RGB duty cycle output expression of the atmosphere light is as follows: Duty cycle of red light: Rd_new = Rp_update / Td Green light duty cycle: Gd_new = Gp_update / Td Duty cycle of blue light: Bd_new=Bp_update / Td.

7. The LED high temperature protection method according to claim 1, characterized in that: A filter circuit is provided between the MUC controller and the LED driver IC1, and the filter circuit is provided with a magnetic bead FB1. The front end of the magnetic bead FB1 is connected to the signal output end of the MUC controller, the front end of the magnetic bead FB1 is connected in series with a bidirectional voltage regulator diode ESD1 and then grounded, the rear end of the magnetic bead FB1 is connected to the signal input end of the LED driver IC1, and the rear end of the magnetic bead FB1 is connected in series with a capacitor C5 and then grounded.

8. The LED high temperature protection method according to claim 1, characterized in that: A power protection circuit is provided between the atmosphere lamp and the power supply, and the power protection circuit is provided with a resistor R1, the front end of the resistor R1 is connected to the power supply, the front end of the resistor R1 is connected in series with capacitors C3 and C4 in sequence and then grounded, the rear end of the resistor R1 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the anode of the atmosphere lamp, and the rear end of the resistor R1 is connected in series with capacitor C2 and then grounded.

9. The LED high temperature protection method according to claim 1, characterized in that: In the step 1, the LED driver IC1 is an INDIE83212D14 chip.

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