Luminescence control method for electronic acne removal patch

Abstract

The invention provides a light-emitting control method for an electronic acne removing patch, which comprises the following specific steps: outputting a control signal for driving an LED by a controller, adjusting the control signal by adopting a PID algorithm based on the control signal, and inputting the adjusted control signal into an LED driving circuit to drive the LED; the output current of the ED driving circuit is detected, after a detection signal is adjusted through a PID algorithm, the voltage corresponding to the adjusted current is fed back to the controller to serve as a control signal of the controller so as to control constant-current output of the LED driving circuit, and therefore accurate control over the light source of the acne removing patch can be achieved, and the acne removing effect can be improved.

Description

Technical Field

[0001] The present invention relates to electronic acne patch control technology, and in particular to a method for realizing light emission control through constant current LED control technology. Background Art

[0002] Electronic acne patches currently on the market usually use a constant power supply to directly drive the LED. However, due to unstable power supply and errors in LED drive voltage, the irradiance of the output light is unstable. This instability not only varies between different devices, but also affects the total amount of light irradiance, thereby affecting the acne removal effect. Specifically, the instability of light irradiance makes it difficult to accurately control the total amount of light, which is crucial for acne removal.

[0003] In addition, existing acne patches are usually powered directly by 3V button batteries. Due to the low supply voltage, and the low-power LED driving voltage range is usually between 1.8V and 3.6V, the battery power will gradually decrease after a period of use, causing the LED driving voltage to drop, the LED cannot be fully turned on, the current is too small, and the LED irradiance is reduced, affecting the acne removal effect. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a light emitting control method for an electronic acne patch, which can solve the problem of inaccurate illumination in the prior art through constant current LED control, thereby improving the stability and illumination effect of the LED light source and enhancing the use effect of the electronic acne patch.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a method for controlling the light emission of an electronic acne patch; the specific steps thereof include: The controller outputs a control signal for driving the LED, and based on the control signal, a PID algorithm is used to adjust the control signal, and the adjusted control signal is input into the LED driving circuit to drive the LED; The output current of the ED driving circuit is detected, and after the detection signal is adjusted using the PID algorithm, the voltage corresponding to the adjusted current is fed back to the controller as the control signal of the controller to control the constant current output of the LED driving circuit.

[0006] Preferably, the specific steps of the PID algorithm include: Compare the current current with the set current to generate a proportional value, calculate the integral value by calculating the sum of the deviations over a period of time, and calculate the difference between the deviations to obtain the differential value; The control value is obtained by combining proportional, integral and differential regulation.

[0007] Preferably, a step-down power supply is provided in the LED driving circuit.

[0008] Preferably, the electronic acne patch used in the method is provided with a battery for powering the controller and the LED drive circuit.

[0009] The present invention provides a light-emitting control method for an electronic acne-removing patch, which has the following beneficial effects: 1. Improved the stability of LED light source and ensured precise control of light irradiance.

[0010] 2. Enhanced acne removal effect and promoted skin recovery through stable lighting conditions.

[0011] 3. Compared with the disposable acne patch on the market, the present invention can be recharged and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A control principle diagram of a light-emitting control method of an electronic acne-removing patch provided by the present invention; Figure 2 This is a PID algorithm control flow chart in the light-emitting control method of an electronic acne-removing patch provided by the present invention. DETAILED DESCRIPTION

[0013] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0014] like Figure 1 As shown, the present invention provides a method for controlling the light emission of an electronic acne patch, and the specific steps include: The controller outputs a control signal for driving the LED, and based on the control signal, a PID algorithm is used to adjust the control signal, and the adjusted control signal is input into the LED driving circuit to drive the LED; The output current of the ED driving circuit is detected, and after the detection signal is adjusted using the PID algorithm, the voltage corresponding to the adjusted current is fed back to the controller as the control signal of the controller to control the constant current output of the LED driving circuit.

[0015] Specifically, the present invention uses a resistor to detect the current of the LED drive circuit, a PID algorithm, controls the voltage according to the feedback current, and uses the voltage as the input signal of the controller, thereby achieving a constant current output, ensuring that the light source maintains a constant light intensity under different working conditions. The electronic acne patch used in the present invention is provided with a wireless or wired charging battery for powering the controller and the LED drive circuit. When the battery is wirelessly or wired charged, its charging voltage is 3.7V.

[0016] In this embodiment, in the LED driving circuit, this is a step-down power supply, which can reduce the power supply to the driving voltage required by the LED to meet the irradiance, thereby ensuring the LED performance.

[0017] In the electronic acne patch circuit of the present invention, the LED is connected to the battery and connected in series with the detection resistor to the ground. The voltage on the detection resistor is fed back to the corresponding detection current, wherein the detection voltage is connected to the AD interface of the controller through RC filtering. The controller calculates the current at this time through the voltage, and the controller uses the current at this time as the input signal of the PID algorithm for signal regulation.

[0018] like Figure 2 As shown in the figure, the process of signal adjustment by PID algorithm is: Compare the current current with the set current to generate a proportional value, calculate the integral value by calculating the sum of the deviations over a period of time, and obtain the differential value by calculating the difference between the deviations. Combine the three regulation rules of proportional, integral, and differential to obtain the control value, thereby controlling the LED drive voltage. Proportional regulation is used to calculate the current error to prevent the instantaneous deviation from being too large. Integration is used to continuously accumulate deviations. The error must be zero in steady state to reduce the total current error. Differential regulation can predict future errors and play a role in rapid regulation. Different effects can be achieved through precise current control. The current current error is reduced by proportionality, so that the irradiance is output stably. The integral reduces the total error, thereby controlling the total irradiance output stably. The differential regulation reduces the change, thereby controlling the irradiance from changing suddenly. This ensures that the light source maintains a constant light intensity under different working conditions.

[0019] Since the electronic acne patch is small in size, the battery capacity used is generally small. When selecting a charging management chip, a low-current charging chip needs to be selected. The present invention selects a battery capacity of about 3.7V 50mAh.

[0020] When the voltage required for the LED to meet the irradiance is lower than the battery voltage, a buck driver can be set at the battery end to reduce the voltage required for the LED to meet the irradiance, so that the LED irradiance can be output at a constant level. Select an LED that can maintain irradiance below 3.2V. When the battery is below 3.2V, the device automatically shuts down to protect the battery and ensure LED performance.

[0021] In the present invention, the battery is charged by USB or wireless charging.

[0022] The test shows that during the working time of 3.7V driving constant current LED, the acne removal effect is more stable, and the improvement effects of acne patch directness, acne hemoglobin area, acne area ITA angle, and acne area gloss are better than those of 3V button battery non-constant current solution, and the effect per unit irradiation time is relatively stable and controllable.

[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A method for controlling the light emission of an electronic acne patch, characterized in that: The specific steps include: The controller outputs a control signal for driving the LED, and based on the control signal, a PID algorithm is used to adjust the control signal, and the adjusted control signal is input into the LED driving circuit to drive the LED; The output current of the ED driving circuit is detected, and after the detection signal is adjusted using the PID algorithm, the voltage corresponding to the adjusted current is fed back to the controller as the control signal of the controller to control the constant current output of the LED driving circuit.

2. The light emitting control method of the electronic acne patch according to claim 1, characterized in that: The specific steps of the PID algorithm include: Compare the current current with the set current to generate a proportional value, calculate the integral value by calculating the sum of the deviations over a period of time, and calculate the difference between the deviations to obtain the differential value; The control value is obtained by combining proportional, integral and differential regulation.

3. The light emitting control method of the electronic acne patch according to claim 1, characterized in that: The LED driving circuit is provided with a step-down power supply.

4. The light emitting control method of the electronic acne patch according to claim 1, characterized in that: The electronic acne-removing patch used in the method is provided with a battery for supplying power to a controller and an LED driving circuit.

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