CN219048812U

CN219048812U - LED appearance that moults based on strong pulse light

Info

Publication number: CN219048812U
Application number: CN202222060628.3U
Authority: CN
Inventors: 刘木清; 赵杰; 林上飞
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2022-08-06
Filing date: 2022-08-06
Publication date: 2023-05-23
Anticipated expiration: 2032-08-06

Abstract

The utility model belongs to the technical field of phototherapy, and particularly relates to an LED dehairing instrument based on strong pulse light. The LED dehairing instrument comprises an LED light source module, a control module, a driving module and an outer cover; the LED light source module is used for emitting strong pulse light outwards; the control module is used for generating a control signal; the driving module is used for receiving the control signal and generating a driving signal so as to drive the LED light source module; the LED dehairing instrument can generate high-energy illumination in a short time, and meets the effective light energy requirement of receiving target tissues in unit time. The LED dehairing instrument can adjust various pulse light parameters including frequency, duty cycle, amplitude and the like. The peak optical power density of the strong pulse light can reach 300W/cm ² The energy density reaches the threshold of the effective energy density of the laser phototherapy, and can realize the effectivenessIs used for depilation of large area.

Description

LED appearance that moults based on strong pulse light

Technical Field

The utility model belongs to the technical field of phototherapy, and particularly relates to an LED dehairing instrument.

Background

Currently, the light sources used for phototherapy are mainly lasers and LEDs. Among them, laser light has been used in a variety of clinical treatments for an early period of time in the medical field. For example: the near-red light laser with low power of 810nm is used for treating eye light and eyes, femtosecond laser, 808nm low power laser is used for surgical operation, 980nm laser is used for treating oral diseases and the like. Such as laser dehairing, the theoretical basis of which is selective photothermal action. The light energy from the laser is selectively absorbed by the hair bulb and melanin in the hair shaft. The latter absorbs the light energy, converts the light energy into heat energy, and transfers the heat to the hair bulb and the carina of the hair follicle, so that the hair follicle is irreversibly destroyed. The wavelength of dehairing is 600-1000 nm. Ruby lasers (694 nm), emerald lasers (755 nm), semiconductor lasers (810 nm), nd: YAG lasers (1064 nm) are commonly used. The end-point response of laser dehairing treatment is erythema or edema around the hair follicle within minutes after treatment. This end-point response is an inflammatory response of eosinophils, which is associated with the damage to hair follicles. The inflammatory response is due to the fact that melanin present in the epidermis is also involved in the absorption of light energy, causing damage to surrounding tissues and cells. In addition, the laser has only millimeter-level laser spot area, so that laser phototherapy is not suitable for treating diseases such as larger affected area.

The LED has a light emitting angle of 120 degrees, is more suitable for phototherapy of an affected part with a larger area, and is increasingly used as a light source of phototherapy equipment in clinical and other medical fields. LED phototherapy relies on the mechanism of action of photo-biological regulation (PBM), i.e. the transfer of light energy to cells and molecules within cellular organelles, causing cells to produce photochemical, electrochemical and thermal reactions, ultimately leading to differences in the expression and metabolism of cellular gene levels. Currently, scientists have found that LED-based PBM techniques have a biphasic dose response during treatment. I.e. too low or too high a light dose may lead to a significant difference in experimental results. This indicates that there is a requirement for optimal light dosage when using LED PBM technology, neither too low nor too high a light dosage is desirable. Thus, it is necessary for the LED phototherapy device to perform pre-experiments to determine the optimal light dose for different target tissues.

In addition, because the light energy density of the LED is much smaller than that of the laser, and the penetration depth of the light rays with large angles in the skin is limited, the energy density of the light rays penetrating through the skin to the target tissue is limited, and sometimes the effective energy density threshold cannot be reached, so that the phototherapy effect is affected. Thus, there is a need for further improvements in LED phototherapy devices to achieve a threshold for laser phototherapy at their light energy density.

In order to solve the above problems, the present utility model provides an LED dehairing instrument based on intense pulsed light, which is developed based on LEDs and can generate up to 300W/cm ² The energy density reaches the threshold of the effective energy density of laser phototherapy, and effective large-area depilation can be realized.

Disclosure of Invention

The utility model aims to provide an LED dehairing instrument capable of generating strong pulse light of high-peak optical power density pulse light.

The utility model provides an LED dehairing instrument with strong pulse light, which consists of an LED light source module, a control module, a driving module, a system outer cover and a probe outer cover. The LED light source module is used for emitting strong pulse light outwards. The control module is used for generating a control signal. The driving module is used for receiving the control signal and generating a driving signal so as to drive the LED light source module. The system housing is used for sealing the LED light source module, the control module and the driving module. The probe housing is used to enclose the probe. Wherein:

the LED light source module consists of an LED array and a circuit substrate. The LED array consists of LED particles with the packaging size of 1.4mm and the electric power of 5W, and the arrangement of the LED array adopts five parallel connection and seven series connection. The light source of the LED array is a single-color LED light source or a plurality of single-color LED light sources having different peak wavelengths (LED peak wavelength class N >2, e.g., N is 3,4,5, etc.)). The peak wavelength range is 200 nm-1000 nm, and the full width of the half wave of the spectrum is less than 40nm.

The LED array receives working signals from the driving module through the circuit substrate and is used for emitting light.

The control module is mainly composed of two voltage-reducing circuits and a main control circuit mainly composed of a single chip microcomputer. The circuit of the first step-down circuit can realize 48V-5V voltage conversion and is used for supplying power to the singlechip. The circuit of the other step-down circuit can realize 48V-15V voltage conversion for supplying power to the grid driver in the driving module. The singlechip is used for receiving a key signal input by a user, generating and outputting a control signal. The control signal has two kinds of continuous pulse signals and pulse group signals. The continuous pulse signal is an infinite number of PWM pulses. The burst signal consists of a limited number of pulses and a fixed period of time. The total time of operation is equal to the product of the number and the period of the limited number of pulses. A fixed period of time, on the order of microseconds or milliseconds. A fixed period of time equal to at least twice the total time of operation. And a control signal generated by the singlechip is transmitted to the six-way inverter of the driving module.

The driving module consists of four large-capacity electrolytic capacitors, six inverters, a grid driver and two field effect transistors.

The input end of the six-way inverter is connected with the singlechip, and the output end of the six-way inverter is connected with the grid driver and used for increasing the driving current of an input signal. The input ends of the six-way inverter receive the control signal. The six-way inverter outputs a signal with amplitude of 5V and maximum current of 100 mA. The input end of the grid driver is connected with the six-way inverter, and the output end of the grid driver is connected with the two N-channel enhancement type field effect transistors, so that the signal amplitude is adjusted to 15V, and the switch of the field effect transistors is controlled. The gate driver outputs a signal with an amplitude of 15V and a maximum current of 1500 mA. The drain electrodes and the source electrodes of the two N-channel enhancement type field effect transistors are connected with four high-capacity electrolytic capacitors and used for controlling the charge and discharge of the high-capacity electrolytic capacitors. And the output end of the high-capacity electrolytic capacitor is connected with the LED power module and is used for generating a driving signal.

The specific parameters of the driving signal are as follows: the amplitude range is 0-50V, and the current range is 0-200A.

The high-capacity electrolytic capacitor is preferably of the type EWH2CM471M30OT, 470uf-47000 uf.

When the strong pulse light system is powered on, the specific working principle of the driving module is as follows: the high-capacity electrolytic capacitor starts to charge, and after the high-capacity electrolytic capacitor is fully charged, the voltage at two ends of the high-capacity electrolytic capacitor is equal to the voltage of the power supply. By controlling the switch of the two field effect transistors, a power pulse with the amplitude equal to the voltage at two ends of the high-capacity electrolytic capacitor is formed, and when the field effect transistor above the two field effect transistors is conducted and the field effect transistor below the two field effect transistors is turned off, a large current can be output in a short time, so that the large current pulse is realized. The frequency and the pulse width of the pulse signals output by the driving module and the frequency and the pulse width of the PWM signals output by the control module are equal.

The utility model has the beneficial effects that:

(1) The LED dehairing instrument with strong pulse light has output peak light power density up to 300W/cm ² Energy density of about 15J/cm ² The energy density threshold requirement of low-level laser phototherapy is met;

(2) The LED dehairing instrument with strong pulse light is developed based on LEDs, and the area of phototherapy facula is usually in the centimeter level and is larger than that of laser facula. Solving the technical difficulty of the prior PBM based on LEDs;

(3) The LED dehairing instrument with strong pulse light provided by the utility model has the advantages that the strong pulse light is controllable, various pulse light parameters are adjustable, including frequency, duty ratio, amplitude and the like, and effective large-area dehairing can be realized.

Drawings

FIG. 1 is a schematic diagram of the basic module relationship of the present utility model.

Fig. 2 is an overall schematic of the present utility model.

Fig. 3 is a schematic view of an LED light source module according to the present utility model.

Fig. 4 is a first step-down circuit diagram of the present utility model.

Fig. 5 is a second step-down circuit diagram of the present utility model.

Fig. 6 is a circuit diagram of a driving module according to the present utility model.

Fig. 7 is a periodic schematic diagram of a burst mode according to the present utility model.

Reference numerals in the drawings: 1 is an LED light source module, 2 is a control module, 3 is a driving module, 4 is a system housing, 5 is a probe housing, 6 is an LED array, 7 is a circuit substrate, 8 is a fixed hole, 9 is a through hole, 10 is a high-capacity electrolytic capacitor, 11 is a six-way inverter, 12 is a gate driver, and 13 is two field effect transistors.

Detailed Description

The technical scheme of the utility model will be further described with reference to the embodiment and the attached drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without making any inventive effort are within the scope of the present utility model.

The basic module relationship of the present utility model is shown in fig. 1.

The LED dehairing instrument based on strong pulse light consists of an LED light source module 1, a control module 2, a driving module 3, a system outer cover 4 and a probe outer cover 5, as shown in fig. 2. The LED light source module 1 is configured to emit strong pulsed light outwards. The control module 2 is used for generating a control signal. The driving module 3 is configured to receive the control signal and generate a driving signal to drive the LED light source module 1. The housing 4 is used to enclose the LED light source module 1, the control module 2 and the drive module 3. The housing 5 is used to enclose the probe.

The LED light source module 1 is shown in fig. 3. The module consists of an LED array 6 and a circuit substrate 7. The LED array 6 is composed of LED particles with the packaging size of 1.4mm and the electric power of 5W, the specific model is LUXEON Rubix, and the arrangement of the LED array 6 adopts five parallel connection and seven series connection. The light source of the LED array 6 is a single-color LED light source or a plurality of single-color LED light sources having different peak wavelengths (LED peak wavelength kinds N > 2). The peak wavelength range is 200 nm-1000 nm, and the full width of the half wave of the spectrum is less than 40nm. The epilator preferably uses LEDs with peak wavelengths of 630nm and 660nm as the light source of the LED array 6. The LED array 6 receives the operation signal from the driving module 3 through the circuit substrate 7 to emit light. The circuit substrate 7 has two fixing holes 8 for fixing the LED light source module 1 inside the probe cover 5. The circuit board 7 has a plurality of vias 9.

The control module 2 is mainly composed of two voltage-reducing circuits and a main control circuit mainly composed of a single chip microcomputer. The circuit design of the first step-down circuit is shown in fig. 4, and can realize 48V-5V voltage conversion for supplying power to the singlechip. Another circuit design of the step-down circuit is shown in fig. 5, which can realize 48V-15V voltage conversion for supplying power to the gate driver 12 in the driving module 3. The singlechip is used for receiving a key signal input by a user, generating and outputting a control signal. The control signal has two kinds of continuous pulse signals and pulse group signals. The continuous pulse signal is an infinite number of PWM pulses. The PWM pulse parameters are: amplitude is 5V, maximum current is 20mA, frequency range is 0.1-10000 Hz, and pulse width range is 1 us-1000 ms. The burst signal consists of a limited number of pulses and a fixed period of time. The number of pulses is limited to a range of 10-1000 PWM pulses. The number of pulses is limited, and specific parameters are as follows: amplitude is 5V, maximum current is 20mA, frequency range is 0.1-10000 Hz, and pulse width range is 1 us-1000 ms. I.e. the shortest pulse width is 1us and the longest pulse width is 1000ms. The shortest pulse width corresponds to a duty cycle of 1% and a period of 100us. The duty cycle corresponding to the longest pulse width is 10% and the period is 10s. The total time of operation is equal to the product of the number and the period of the limited number of pulses. A fixed period of time, on the order of microseconds or milliseconds. A fixed period of time equal to at least twice the total time of operation. The control signal generated by the singlechip is transmitted to the six-way inverter 11 of the driving module 3.

The circuit design of the drive module 3 is shown in fig. 6. The driving module is composed of a large-capacity electrolytic capacitor 10, six paths of inverters 11, a grid driver 12 and two field effect transistors 13.

The input end of the six-way inverter 11 is connected with the singlechip, and the output end of the six-way inverter is connected with the grid driver 12 for increasing the driving current of the input signal. The input of the six-way inverter 11 receives the control signal. The six-way inverter 11 outputs a signal of 5V in amplitude and 100mA in maximum current. The gate driver 12 has an input terminal connected to the six-way inverter 11, and an output terminal connected to the two N-channel enhancement field effect transistors 13, for adjusting the signal amplitude to 15V and controlling the switching of the field effect transistors 13. The gate driver 12 outputs a signal with an amplitude of 15V and a maximum current of 1500 mA. And the drain electrode and the source electrode of the two N-channel enhancement type field effect transistors 13 are connected with the high-capacity electrolytic capacitor 10 and are used for controlling the charge and discharge of the high-capacity electrolytic capacitor 10. The output end of the high-capacity electrolytic capacitor 10 is connected with the LED power module 1 and used for generating a driving signal. The specific parameters of the driving signal are as follows: the amplitude range is 0-50V, and the current range is 0-200A. The high-capacity electrolytic capacitor 10 is preferably of the EWH2CM471M30OT type and has a capacity of 470uF-47000 uF.

When the strong pulse light system is powered on, the specific working principle of the driving module 3 is as follows: the high-capacity electrolytic capacitor 10 starts to charge, and after the high-capacity electrolytic capacitor 10 is fully charged, the voltage at both ends of the high-capacity electrolytic capacitor 10 is equal to the voltage of the power supply. By controlling the switch of the two field effect transistors 13, a power pulse with the amplitude equal to the voltage at two ends of the large-capacity electrolytic capacitor 10 is formed, and when the field effect transistor above the two field effect transistors 13 is turned on and the field effect transistor below the two field effect transistors 13 is turned off, a large current can be output in a short time, so that the large current pulse is realized. The frequency and the pulse width of the pulse signals output by the driving module 3 and the frequency and the pulse width of the PWM signals output by the control module 2 are equal. Since the peak current flowing through the LED array 6 in the LED light source module 1 is very large, it is considered that the heat generation of the LED array 6 is serious if a large current flows for a long time. In order to extend the life of the LED array 6 in the LED light source module, it is recommended to set the duty cycle of the PWM pulses in the control module 2 to 1% or less.

The depilatory instrument is used for depilatory treatment of the body hair under the armpit. The target cells are melanin of hair follicle tissue. The literature has shown that the effective energy density threshold for dehairing is 5J/cm ² The light dose density of suitable low intensity laser phototherapy is typically 10J/cm ² . When in clinical dehairing treatment of human body, the high-intensity pulse light with the peak wavelength of 650nm is adopted to treat 30 patients, and the cure rate reaches 100 percent. Medium light energy density (20-30J/cm) among 189 dehairing patients admitted to the department of dermatology of the department of health and profession of Anhui West, the year 2017-2020 ² ) And a high light energy density (30 to 40J/cm) ² ) The laser phototherapy technology of the utility model can obviously remove hair and reduce the incidence rate of complications.

The density of the optical power emitted by the dehairing instrument is up to 300W/cm ² . According to the existing literature data results, during the use of the dehairing instrument, the user preferably selects a pulse group signal mode in the control module to ensure the phototherapy effect and simultaneously prolong the LED light source module 1The service life of the LED array 6. The photo-biological regulation PBM principle of LED phototherapy dehairing is as follows: the use of multiple pulses of light during the thermal relaxation time of the hair follicle, the energy of these pulses of light being added together, results in an energy density per unit time exceeding the effective energy density threshold for hair removal. When sufficient light energy strikes the hair follicle cells, it will cause necrosis. Specifically, assuming a thermal relaxation time of 100ms for the hair follicle, as shown in fig. 7, the control signal for the selected epilator is a pulse burst signal. Specific parameters for setting a limited number of pulses are: the amplitude is 50V, the pulse width is 1ms, the duty ratio is 50%, the period is 2ms, and the number is 50, so that the total working time is 100ms. The fixed time period is set to 900ms, which is 9 times of the total working time. Thus, the period of the pulse group signal is 1.0s. The peak optical power of the pulse group reaches 300W/cm in one period ² . It can be calculated that the total energy density of the hair follicle cells cumulatively received is equal to 15J/cm after one cycle time of the pulse group signal within the thermal relaxation time of the hair follicle ² . The total energy density is higher than the effective energy density threshold of the low-intensity laser for depilation, so that the depilation instrument can effectively depilation. Then the specific depilating instrument is used and operated, and the related steps of the conventional laser for depilating treatment can be referred, so that the depilating effect with a larger area can be finally achieved. Efficacy is measured primarily by calculating the effective rate and hair clearance. Effective rate = (cure + active + effective) number of cases/total number of cases x 100%, wherein cure: no macroscopic coarse hair in the treatment zone; has obvious curative effect, and the average treatment area is less than 5 roots/cm ² The method comprises the steps of carrying out a first treatment on the surface of the The method is effective: the average treatment area is less than 10 roots/cm ² Ineffective, the average treatment area is greater than 10 roots/cm ² . Hair clearance = (pre-treatment hair density-post-treatment hair density)/pre-treatment hair density x 100%, wherein hair density is the number of hair roots per square centimeter area (roots/cm) ² ）。

Claims

1. The LED dehairing instrument based on the strong pulse light is characterized by comprising an LED light source module, a control module, a driving module, a system outer cover and a probe outer cover; the LED light source module is used for emitting strong pulse light outwards; the control module is used for generating a control signal; the driving module is used for receiving the control signal and generating a driving signal so as to drive the LED light source module; the system outer cover is used for sealing the LED light source module, the control module and the driving module, and the probe outer cover is used for sealing the probe; wherein:

the LED light source module consists of an LED array and a circuit substrate; the LED array consists of LED particles with the packaging size of 1.4mm, 1.4mm and the electric power of 5W; five parallel connection and seven series connection are adopted for the arrangement of the LED array; the light source of the LED array is a single-color LED light source or a plurality of single-color LED light sources with different peak wavelengths, the peak wavelength variety N of the multicolor LED is more than 2, the peak wavelength range is 200 nm-1000 nm, and the full width of the spectrum half wave is less than 40nm;

the LED array receives working signals from the driving module through the circuit substrate and is used for emitting light rays;

the control module consists of two voltage reduction circuits and a main control circuit mainly composed of a singlechip; the circuit of the first step-down circuit is used for realizing 48V-5V voltage conversion and is used for supplying power to the singlechip; the circuit of the other step-down circuit is used for realizing 48V-15V voltage conversion and is used for supplying power to the grid driver in the driving module; the singlechip is used for receiving a key signal input by a user, generating and outputting a control signal; the control signal comprises a continuous pulse signal and a pulse group signal; the continuous pulse signal is an infinite number of PWM pulses; the pulse group signal consists of a limited number of pulses and a fixed period of time; a limited number of pulses, the total operating time being equal to the product of said number and period; a fixed period of time, in the order of microseconds or milliseconds; a fixed period of time equal to at least twice said total operating time; the control signal generated by the singlechip is transmitted to a six-way inverter of the driving module;

the driving module consists of four large-capacity electrolytic capacitors, six inverters, a grid driver and two field effect transistors; the input end of the six-way inverter is connected with the singlechip, and the output end of the six-way inverter is connected with the grid driver and is used for increasing the driving current of an input signal; the input end of the six-way inverter receives a control signal; the six-way inverter outputs a signal with the amplitude of 5V and the maximum current of 100 mA; the input end of the grid driver is connected with the six-way inverter, and the output end of the grid driver is connected with the two N-channel enhancement type field effect transistors, so as to adjust the signal amplitude to 15V and control the switching of the field effect transistors; the grid driver outputs a signal with the amplitude of 15V and the maximum current of 1500 mA; the drain electrodes and the source electrodes of the two N-channel enhancement type field effect transistors are connected with the four high-capacity electrolytic capacitors and used for controlling the charge and discharge of the high-capacity electrolytic capacitors; and the output end of the high-capacity electrolytic capacitor is connected with the LED power module and is used for generating a driving signal.

2. The LED dehairing instrument based on strong pulse light according to claim 1, wherein in the control module, the PWM pulse parameters are: amplitude is 5V, maximum current is 20mA, frequency range is 0.1-10000 Hz, and pulse width range is 1 us-1000 ms; the limited number of pulses is 10-1000 PWM pulses; the specific parameters of the limited number of pulses are as follows: amplitude is 5V, maximum current is 20mA, frequency range is 0.1-10000 Hz, and pulse width range is 1 us-1000 ms; i.e. the shortest pulse width is 1us and the longest pulse width is 1000ms; the duty ratio corresponding to the shortest pulse width is 1%, and the period is 100us; the duty cycle corresponding to the longest pulse width is 10% and the period is 10s.

3. The LED epilator based on intense pulsed light of claim 1, wherein specific parameters of the driving signal are: the amplitude range is 0-50V, and the current range is 0-200A.

4. The LED dehairing instrument based on strong pulse light according to claim 1 wherein the high capacity electrolytic capacitor capacity is 470uf-47000 uf.

5. The LED epilator based on intense pulsed light of claim 1, wherein the peak wavelength of the light sources of the LED array is 630nm and 660nm.