LED pulse light freckle removal device

Abstract

The present invention relates to an LED pulse light spot remover, comprising an LED light source module, a sensor module, an interaction module and a drive control module; the LED light source module is used to generate pulse light, and the light parameters of the pulse light are calculated based on the thermal relaxation of human tissue; the sensor module is used to obtain working data; the interaction module is used to receive control commands; the drive control module is used to control the LED light source module to work according to the working data and the control commands. The LED pulse light spot remover of the present invention has a small size, high luminous efficiency, uniform light spots and easy control of light parameters.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an LED pulse light spot removal device. Background Art

[0002] The scars on the human body are a major problem that bothers people. For a long time, people have tried to remove the scars by taking oral medications, applying chemical reagents, etc. However, these methods have limited effects and cannot effectively remove the scars. In recent years, with the development of optoelectronic technology, the application of photonics in the biological field has received more and more attention, and light therapy for diseases has been proven to be a feasible means.

[0003] For the phototherapy of scars, in order to penetrate the surface skin to act on the scars, destroy the melanosomes therein, and achieve the purpose of removing scars, high-intensity light is generally required. At present, the light freckle removal equipment generally uses a laser light source to emit high-energy light, which penetrates the skin with high-energy light and irradiates the scar cells and tissues to achieve the purpose of treatment. Limited by the light-emitting mechanism and current engineering technology, the light efficiency of the laser light source is not high. In order to achieve the treatment effect, the volume and power must be increased, resulting in a large amount of heat generated by the laser light source. A cooling head must be equipped to reduce the skin temperature in the treatment area, which increases the cost and the volume of the device. On the other hand, the cooling head must be close to the skin during use, which will also irritate the skin and affect the user's experience. Since the distance between the light source of the phototherapy device and the phototherapy area is close, it is very easy to cause burns to the user, and excessively high temperatures will also cause irreversible damage to the activity of cells and tissues, which is not conducive to the skin's freckle removal effect. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an LED freckle removal device that can emit an instantaneous high-intensity light beam and has lower overall heat generation. While having similar or better freckle removal effects, it reduces heat generation and costs, thereby improving user experience.

[0005] To achieve the purpose of the present invention, the present invention provides an LED pulse light freckle removal device, including an LED light source module, a sensor module, an interaction module and a drive control module; the LED light source module is used to generate pulse light, and the light parameters of the pulse light are calculated based on the thermal relaxation of human tissue; the sensor module is used to obtain working data; the interaction module is used to receive control commands; the drive control module is used to control the operation of the LED light source module according to the working data and the control commands.

[0006] Preferably, the light parameters of the pulsed light include a duty cycle, and the duty cycle is within the range of Dr1 and Dr2; Dr1 and Dr2 are calculated based on thermal relaxation of human tissue: Dr1 satisfies T1-T0=(El×Dr1 / f)×α×β1 / Ch, where T1 is the lowest temperature at which irreversible damage occurs to melanosomes, T0 is the initial temperature of skin tissue, El is the electric power of the LED light source module, f is the frequency, α is the photothermal conversion coefficient, β1 is the melanosome absorption coefficient, and Ch is the specific heat capacity of melanosomes; Dr2 satisfies T2-T0=(El×Dr2 / f)×α×β2 / Cb, where T2 is the lowest temperature at which epidermal cells are damaged, T0 is the initial temperature of skin tissue, El is the electric power of the LED light source module, f is the frequency, α is the photothermal conversion coefficient, β2 is the epidermal tissue absorption coefficient, and Cb is the specific heat capacity of epidermal tissue.

[0007] Preferably, the LED pulse light freckle removal device also includes a body frame and an illumination bracket that are interconnected, the LED light source module is arranged in the illumination bracket, the drive control module is arranged in the body frame, and the interaction module is connected to the body frame; the interaction module is electrically connected to the drive control module, and the drive control module is electrically connected to the LED light source module.

[0008] Preferably, the LED light source module includes an LED light board and a focusing lens, and the LED light board and the focusing lens are sequentially arranged in the lighting bracket from the inside to the outside; a switch key is provided on the lighting bracket, and the switch key is electrically connected to the drive control module for controlling the on and off of the LED light board.

[0009] Preferably, the LED light source module further includes a red light source, the red light source has the same irradiation range as the LED light board, and the red light source works when the LED pulse light freckle remover is started.

[0010] Preferably, the LED light board includes multiple LED arrays; the LED array is composed of a monochromatic LED light source, or the LED array includes a plurality of monochromatic LED light sources with different peak wavelengths; the central wavelength range of the monochromatic LED light source is 200nm to 1000nm, and the spectral half-wave full width is less than 40nm.

[0011] Preferably, the drive control module includes a pulse drive unit and a controller; the pulse drive unit includes multiple groups of LED drive chips, and the multiple groups of LED drive chips are used to output multiple pulse excitations based on the control signal of the controller and independently drive each of the LED arrays; the controller is used to output control signals, and the control signals include multiple PWM signals and voltage signals; the PWM signal amplitude is 0 to 20V, the frequency range is 20Hz to 20kHz, and the duty cycle range is 0.01% to 10%; the voltage signal range is 0 to 2V.

[0012] Preferably, the sensor module includes a pulse drive unit temperature sensor, an LED light source module temperature sensor, an LED light source module power sensor, a treatment area temperature sensor and a treatment area distance sensor; the pulse drive unit temperature sensor is arranged on the pulse drive unit, the LED light source module temperature sensor and the LED light source module power sensor are arranged on the LED light source module, and the treatment area temperature sensor and the treatment area distance sensor are connected to the illumination bracket and are located on the outside of the LED light source module.

[0013] Preferably, when the temperature detected by the pulse drive unit temperature sensor is higher than a first preset temperature, the temperature detected by the LED light source module temperature sensor is higher than a second preset temperature, the temperature detected by the treatment area temperature sensor is higher than a third preset temperature, the power detected by the LED light source module power sensor is higher than a preset power, or the distance detected by the treatment area distance sensor is greater than a preset distance, the drive control module stops the operation of the LED light source module and issues an alarm through the interaction module.

[0014] Preferably, the interaction module includes a touch screen, which is embedded in the fuselage frame; the touch screen is used to receive the control command and display the working data.

[0015] Preferably, the fuselage frame is connected to the lighting bracket via a retractable connecting tube; a retractable connecting wire is provided in the connecting tube, and the connecting wire connects the LED light source module and the driving control module; a placement slot for accommodating the lighting bracket is provided on the fuselage frame.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. The LED pulse light freckle remover proposed in the present invention adopts LED light source instead of traditional laser light source, which can achieve the same freckle removal effect as traditional laser freckle remover equipment and has less irritation to the skin. Therefore, it can replace laser freckle remover for freckle removal.

[0018] 2. The LED light source used in the LED pulse light freckle removal device of the present invention has high light efficiency and fast response. It can adjust the light intensity, frequency, and duty cycle of the light beam through PWM dimming or current dimming. The light spot is uniform and the irradiation area is large, which can more flexibly adapt to the needs of different irradiation areas.

[0019] 3. The LED pulse light freckle removal device of the present invention adopts an LED light source, which has a wide spectrum, small size, and low power consumption. Compared with the laser light source used in the biomedical field, its size and overall cost are relatively low, and it can meet the needs of consumers at different levels.

[0020] 4. Compared with the steady-state LED light source, the LED pulse light freckle remover of the present invention can output the same energy light in a shorter time, and the pulse interval device can fully dissipate heat, so that the temperature rise of the target area is not obvious under long-term working conditions. The LED pulse light freckle remover of the present invention calculates the light parameters of the frequency light based on the thermal relaxation of human tissue, while ensuring the destruction of melanosomes, it reduces the damage to other tissues, is efficient and safe, and reduces the discomfort of patients.

[0021] 5. The LED pulse light freckle remover of the present invention has strong working stability. Compared with steady-state LED freckle removers with medium and high power, the heat generated by the device is not obvious on a macro scale, and there is no need to equip it with a cooling module, which reduces the size of the device and improves the user experience.

[0022] 6. The LED pulse light freckle removal device of the present invention can provide a variety of treatment modes by adjusting the light-emitting parameters and the light-emitting of different LED arrays. It can be selected according to user needs and has universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a simplified structural schematic diagram of an embodiment of the LED pulse light spot removal device of the present invention.

[0024] Figure 2 It is a simplified structural schematic diagram of the illumination support in the embodiment of the LED pulse light freckle removal device of the present invention.

[0025] Figure 3 This is a simplified structural diagram of the LED light board in the embodiment of the LED pulse light freckle removal device of the present invention.

[0026] Figure 4 It is a schematic diagram of the freckle removing device according to an embodiment of the present invention.

[0027] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation modes. DETAILED DESCRIPTION

[0028] like Figures 1 to 4As shown, the LED pulse light freckle removal device provided in this embodiment is an instrument for melanosomes in epidermal tissue, including an LED light source module U1, a drive control module U2, a sensor module U3, and an interaction module U4. The LED light source module U1 is used to generate pulsed light so that the light acts on the melanosomes in the treatment area. The pulsed light has light parameters calculated based on the thermal relaxation of human tissue. The drive control module U2 is used to analyze and process user and device data and control the operation of the device. The sensor module U3 is used to collect various working data of the device and provide it to the drive control module U2. The interaction module U4 is used for human-computer interaction, displays the device status and receives control commands.

[0029] Among them, the thermal relaxation calculation includes the following steps: for a pulse light with a frequency of f and an LED light power of El, it is irradiated on the skin tissue with an initial temperature of T0. Because there are more melanosomes there and their light absorption ability is stronger than other tissues, most of the light is absorbed by the melanosomes and converted into heat energy. Assume that the pulse energy in one cycle is Ep = El × Dr / f, where Dr is the duty cycle of the pulse light. When the pulse energy acts on the target tissue, the thermal effect generated by the melanosome is Eh = Ep × α × β1, α is the photothermal conversion coefficient, and β1 is the melanosome absorption coefficient. The thermal effect generated by the epidermal tissue is Eb = Ep × α × β2, β2 is the epidermal tissue absorption coefficient; at the end of the illumination stage in a light cycle, the melanosome temperature is T1, and the unit volume temperature rise ΔT1 = T1-T0 = Eh / Ch, Ch is the specific heat capacity of the melanosome. If the melanosome at temperature T1 is irreversibly damaged, set the duty cycle Dr1 of the light cycle as the lower limit. At the end of a light cycle, the temperature of the epidermal tissue is T2, and the unit volume temperature rise ΔT2=T2-T0=Eb / Cb, where Cb is the specific heat capacity of the epidermal tissue. When epidermal cells are damaged at temperature T2, the duty cycle Dr2 of the LED light cycle is set as the upper limit. Therefore, the duty cycle of the pulse light should be set within the range of Dr1 and Dr2. In a light cycle, if the pulse light interval is much longer than the thermal relaxation time of the epidermal tissue, ΔT2≈0, the epidermal tissue will not generate heat macroscopically.

[0030] The LED pulse light spot removal instrument also includes an illumination bracket 41 and a fuselage frame 42, and the illumination bracket 41 is connected to the fuselage frame 42 through a connecting pipe 43. The interactive module U4 includes a touch screen 44, which can be, for example, a 10-inch color touch screen, embedded in the fuselage frame 42. The fuselage frame 42 can be a floor-standing cabinet with pulleys, preferably a rectangular cabinet, for supporting and installing various module devices. The instrument housing included in the fuselage frame 42 is used to protect and package the various modules of the equipment, and the instrument housing can be made of metal and plastic. A receiving groove 45 for accommodating the illumination bracket 41 is provided on the instrument housing. The connecting pipe 43 is a retractable plastic pipe, in which a retractable power cord and a signal line are strung, which are used to connect the fuselage frame and the modules of the illumination bracket. The LED light source module U1 is installed in the illumination bracket 41, and the illumination bracket 41 can be freely moved within the length range of the connecting pipe 43 by hand, which is convenient for removing spots at different positions, and can be stored in the receiving groove 45 of the fuselage frame 42 when stored.

[0031] The LED light source module U1 is composed of an LED light board 11 and a focusing lens 12. The LED light board 11 and the focusing lens 12 are fixed in the illumination bracket 41 from the inside to the outside. There are multiple LED arrays on the LED light board 11. The multiple LED arrays can emit pulsed light with different parameters under the control of the drive control module U2. The LED light source module U1 is connected to the drive control module U2 through a connecting line. The focusing lens 12 converges the light emitted by the LED light board 11, and can adjust the focal length to accurately act on the treatment site. When working, the LED light source module U1 can emit light beams with different parameters to treat the freckles to be removed. The LED array is a monochromatic LED light source, or a plurality of monochromatic LED light sources with different peak wavelengths, and the LED peak wavelength type N is not less than 2; the central wavelength range of the monochromatic LED light source is 200nm to 1000nm, and the spectrum half-wave full width is less than 40nm. The LED array light source emits light in a direction away from the main surface. The LED light source module U1 also has a set of constant current low-power red light sources to assist users in determining the range of action of the instrument when it is working. The lens 12 has the function of interfering with the LED light and is fixed below the LED light board 11. After the LED light enters the lens 12, the light can be focused into a smaller area for treatment.

[0032] The drive control module U2 is composed of a pulse drive unit 21 and a controller 22, which are used to generate a pulse excitation current. The pulse drive unit 21 and the controller 22 are fixed in the fuselage frame 42. The pulse drive unit 21 can output multiple pulse excitation currents to drive the corresponding LED arrays. Specifically, the pulse drive unit 21 can be composed of multiple groups of LED drive chips, which can output multiple pulse excitations, independently drive each LED array, and can perform PWM dimming on each LED array based on the controller control signal. The controller 22 is the control center of the entire device, responsible for collecting and analyzing user instructions and sensor data, displaying device and treatment information to the user through the touch screen 44, and controlling the drive output of the pulse drive unit 21 through control signals. The control signals of the controller 22 are PWM signals and voltage signals. The PWM signal amplitude is 0 to 5V, and the frequency range is 20Hz to 20kHz, which is used to control the wavelength, frequency and duty cycle of the pulse light emitted by the LED light source module U1; the voltage signal range is 0 to 2V, which is used to control the peak light intensity of the pulse light emitted by the LED light source module U1; the parameters of PWM dimming control include wavelength, frequency, duty cycle and peak current.

[0033] The sensor module U3 is composed of multiple sensors such as temperature, power and distance. Specifically, it may include a temperature sensor for measuring the temperature Td of the LED light source module 11, a temperature sensor for measuring the temperature Tb of the treatment light position, a distance sensor for measuring the distance L1 between the light source and the treatment position, and an electric power sensor for measuring the LED electric power W1 of the LED light source module 11. It may also include a temperature sensor for the temperature of the pulse drive unit 21. The data collected by the above sensors are calculated and analyzed by the controller in the drive control module U2 to avoid dangers caused by equipment failure or improper user operation.

[0034] The working process of the LED pulse light freckle removal device of this embodiment is as follows: after the touch screen 44 receives the user's settings and power-on commands, it sends the command information containing the user's treatment information (treatment type and treatment power, etc.) to the controller 22, and the controller 22 loads the preset light parameters based on the command information. The controller 22 collects and calculates and analyzes the temperature Td and the treatment area temperature Tp of the LED light source module 11 collected by the sensor module U3. When Td is lower than 70°C and there is no data for temperature Tp (the device light source is not facing the object), the device is turned on to emit a red guide light to assist the user to adjust the device to a suitable position; when it is close to the suitable position, the user presses the switch, and the controller 22 sends a PWM signal and a voltage control signal to control the pulse drive unit 21 to generate a pulse excitation, and drive the LED light source module U1 to emit a pulse light with preset parameters. During the treatment process, the controller collects the temperature Td, Tp, distance L1 and light power W1 in real time. When the Td temperature exceeds 70°C, the controller 22 controls the device to stop treatment and issues an alarm through the touch screen 44 to remind the user to check the device. When the temperature Tp exceeds 50°C, the controller 22 controls the device to stop treatment and issues an alarm through the touch screen 44 to remind the user to prevent burns. When the power W1 deviation exceeds 5%, the controller controls the device to stop treatment and issues an alarm through the touch screen to remind the user to check the device. When the distance L1 deviation exceeds 20%, the controller temporarily stops the light treatment and reminds the user to adjust the action area through the touch screen.

[0035] The LED pulse light freckle removal device of this embodiment can be used to remove freckles. The target tissue is pigmented spots. There is no obvious change in the number of melanocytes in the epidermal tissue at the freckles, but the number of melanosomes increases significantly. If the melanosomes can be destroyed, the freckles can be improved or eliminated. For example, the following steps can be taken: irradiate the freckles. Since the melanosomes have a much stronger ability to absorb light beam energy than other tissues, it can be considered that most of the light is absorbed by the melanosomes. The melanosomes absorb light energy, the temperature in the area rises rapidly, and the melanosomes are destroyed under short-term high temperature. When the light energy exceeds the threshold, other tissues heat up significantly, so it is necessary to limit the light beam energy within the threshold. Assuming that the peak value of the effective absorption light band of the melanosome is 630nm, the peak power of the pulse light emitted from the LED light board is 5W / mm 2 The duty cycle Dr is 0.5%. The irradiation time of a single treatment cycle is 2s, and the energy density is 5J / cm 2 A course of treatment should consist of 10 light treatments with a 7-day interval between treatments, which can effectively remove freckles.

[0036] As can be seen from the above, compared with the existing freckle removal device, the present invention has the following obvious advantages: using LED-based pulse light as the treatment light, compared with similar products with laser light sources, the LED light source is smaller in size, has higher luminous efficiency, uniform light spot and easy to adjust light parameters, which can effectively reduce the treatment time; compared with similar LED products, the pulse light peak power is higher, can penetrate the shallow tissue, and effectively reach the melanosome-dense area; the pulse light duty cycle is small, the average power is lower, and no cooling device is required, and the effect of destroying melanosomes can be achieved under low power conditions; equipped with temperature and distance sensors, it monitors the user's skin temperature and distance in real time, and gives recommended working modes and use distances. The present invention has broad application prospects and market space.

[0037] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An LED pulse light freckle removal device, characterized in that: It includes LED light source module, sensor module, interaction module and drive control module; The LED light source module is used to generate pulsed light, and the light parameters of the pulsed light are calculated based on thermal relaxation of human tissue; The sensor module is used to obtain working data; The interaction module is used to receive control commands; The driving control module is used to control the operation of the LED light source module according to the operating data and the control command; The light parameters of the pulsed light illumination include a duty cycle, and the duty cycle is within the range of Dr1 and Dr2; Dr1 and Dr2 are calculated based on the thermal relaxation of human tissue: Dr1 satisfies T1-T0=(El×Dr1 / f)×α×β1 / Ch, where T1 is the lowest temperature at which melanosomes undergo irreversible damage, T0 is the initial temperature of skin tissue, El is the electric power of the LED light source module, f is the frequency, α is the photothermal conversion coefficient, β1 is the melanosome absorption coefficient, and Ch is the specific heat capacity of the melanosome; Dr2 satisfies T2-T0=(El×Dr2 / f)×α×β2 / Cb, where T2 is the lowest temperature at which epidermal cells are damaged, T0 is the initial temperature of the skin tissue, El is the power of the LED light source module, f is the frequency, α is the light-to-heat conversion coefficient, β2 is the epidermal tissue absorption coefficient, and Cb is the specific heat capacity of the epidermal tissue; The LED pulse light spot removal device also includes a body frame and an illumination bracket that are interconnected, the LED light source module is arranged in the illumination bracket, the drive control module is arranged in the body frame, and the interaction module is connected to the body frame; The interaction module is electrically connected to the drive control module, and the drive control module is electrically connected to the LED light source module; The LED light source module comprises an LED light board and a condenser lens, wherein the LED light board and the condenser lens are sequentially inside the lighting bracket from inside to outside; The lighting bracket is provided with a switch key, which is electrically connected to the drive control module and is used to control the on and off of the LED light board; The LED light source module further comprises a red light source, the red light source has the same irradiation range as the LED light board, and the red light source is used to emit red guiding light; The LED light board includes a plurality of LED arrays; The LED array is composed of a monochromatic LED light source, or the LED array includes a plurality of monochromatic LED light sources with different peak wavelengths; the central wavelength of the monochromatic LED light source ranges from 200nm to 1000nm, and the spectrum half-wave full width is less than 40nm; The drive control module includes a pulse drive unit and a controller; The pulse driving unit includes a plurality of groups of LED driving chips, and the plurality of groups of LED driving chips are used to output multi-channel pulse excitation based on the control signal of the controller and independently drive each of the LED arrays; The controller is used to receive working data and control commands and output control signals, wherein the control signals include multiple PWM signals and voltage signals; the PWM signal amplitude is 0 to 20V, the frequency range is 20Hz to 20kHz, and the duty cycle range is 0.01% to 10%; the voltage signal range is 0 to 2V.

2. The LED pulse light freckle removal device according to claim 1, characterized in that: The sensor module includes a pulse drive unit temperature sensor, an LED light source module temperature sensor, an LED light source module power sensor, a treatment area temperature sensor and a treatment area distance sensor; The pulse drive unit temperature sensor is arranged on the pulse drive unit, the LED light source module temperature sensor and the LED light source module power sensor are arranged on the LED light source module, and the treatment area temperature sensor and the treatment area distance sensor are connected to the lighting bracket and are located on the outside of the LED light source module.

3. The LED pulse light freckle removal device according to claim 2, characterized in that: When the temperature detected by the pulse drive unit temperature sensor is higher than the first preset temperature, the temperature detected by the LED light source module temperature sensor is higher than the second preset temperature, the temperature detected by the treatment area temperature sensor is higher than the third preset temperature, the power detected by the LED light source module power sensor is higher than the preset power, or the distance detected by the treatment area distance sensor is greater than the preset distance, the drive control module stops the LED light source module and issues an alarm through the interaction module.

4. The LED pulse light freckle removal device according to claim 1, characterized in that: The interactive module includes a touch screen, and the touch screen is embedded in the fuselage frame; The touch screen is used to receive the control command and display the working data.

5. The LED pulse light freckle removal device according to claim 1, characterized in that: The fuselage frame is connected to the lighting bracket via a retractable connecting tube; a retractable connecting wire is provided in the connecting tube, and the connecting wire connects the LED light source module and the driving control module; The fuselage frame is provided with a placement slot for accommodating the lighting bracket.

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