Multifunctional beauty device based on laser and sapphire light-transmitting contact head and phototherapy method

Abstract

The invention relates to the technical field of phototherapy equipment, and discloses a multifunctional beauty device based on a laser and sapphire light-transmitting contact head and a phototherapy method. A vertical cavity surface emitting laser is integrated in the beautifying device; a sapphire light-transmitting contact head is arranged on the beautifying device, an electrode is arranged on the surface of the sapphire light-transmitting contact head in a metal coating or silk-screen mode, an electrode area and a light-emitting area of a vertical cavity surface emitting laser are designed in a staggered mode so as to prevent the electrode from blocking emergent laser, and the electrode is used for achieving a conductive function. The power density and the light emitting angle of the vertical cavity surface emitting laser are controlled, so that the light transmittance of the vertical cavity surface emitting laser is matched with the light transmittance of the sapphire light-transmitting contact head, and the effect of heating the corium layer of the skin is achieved; and controlling the vertical cavity surface emitting laser to output a laser signal, and controlling the electrode to conduct the EMS micro-current.

Description

Technical Field

[0001] This application relates to the field of phototherapy equipment technology, and in particular to a multifunctional beauty device and phototherapy method based on a laser and a sapphire light-transmitting contact head. Background Technology

[0002] In the field of beauty devices, EMS (microcurrent) technology transmits microcurrents to the skin through electrodes to stimulate muscle contraction and improve skin laxity. However, traditional phototherapy beauty devices mostly use LEDs as light sources, which have low power density and severe scattering, making it difficult for light energy to be accurately applied to the dermis. Furthermore, the integration of phototherapy modules and EMS modules often leads to functional interference due to structural conflicts (such as electrodes blocking the light source or the heat from the light source affecting circuit stability).

[0003] Therefore, a method is urgently needed to solve at least one of the above problems. Summary of the Invention

[0004] This application provides a multifunctional cosmetic device and phototherapy method based on a laser and a sapphire transparent contact head. It aims to address the current limitations of existing technologies, which lack solutions for combining a vertical-cavity surface-emitting laser (VCSEL) with a sapphire transparent contact head, and further fail to address the synergistic effect of phototherapy and EMS microcurrents through a staggered design of electrodes and light-emitting areas. Traditional solutions either focus solely on a single EMS or phototherapy function, or employ simple stacking methods when integrating multiple functions, resulting in bulky devices and poor functional compatibility. For example, existing phototherapy devices do not consider the impact of electrode layout on laser emission efficiency, nor do they optimize the coordinated operating parameters of the optical path and circuitry (such as the matching of power density, emission angle, and transmittance) to suit the vertical emission characteristics of VCSELs.

[0005] In a first aspect, embodiments of this application provide a phototherapy method, which is applied to a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head. The beauty device integrates a vertical cavity surface-emitting laser, which emits a laser with a wavelength of 650-700nm. A sapphire light-transmitting contact head is installed on a beauty device. Electrodes are set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing. The electrode area is staggered with the light-emitting area of ​​the vertical cavity surface emitter laser to avoid the electrodes blocking the laser light emission. The electrodes are used to achieve the function of conducting electricity. The method includes: Based on the light transmittance of the sapphire light-transmitting contact head, the power density and emission angle of the vertical cavity surface-emitting laser are controlled to match the light transmittance of the vertical cavity surface-emitting laser with that of the sapphire light-transmitting contact head, so as to form a heating effect on the dermis of the skin. The vertical cavity surface emitter laser is controlled to output a laser signal, and the electrodes are controlled to conduct EMS microcurrents.

[0006] In some embodiments, the beauty device integrates a vertical-cavity surface-emitting laser, comprising: setting at least one vertical-cavity surface-emitting laser array on the motherboard of the beauty device, the vertical-cavity surface-emitting laser array being electrically connected to the motherboard via a flexible circuit board, and the light emission direction of each vertical-cavity surface-emitting laser being perpendicular to the surface of the sapphire light-transmitting contact head, wherein the wavelength of the vertical-cavity surface-emitting laser is a continuous wave or pulsed wave of 650-700nm.

[0007] In some embodiments, the beauty device is provided with a sapphire light-transmitting contact head, including: the sapphire light-transmitting contact head is an arc-shaped structure with a light transmittance greater than a preset light transmittance, the surface of the sapphire light-transmitting contact head that contacts the skin is optically polished, and an anti-reflection film is coated inside or on the surface of the sapphire substrate.

[0008] In some embodiments, the electrode is set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing, including: forming a metal electrode layer with a thickness of a preset thickness range on the sapphire surface by means of direct copper plating process, or printing silver paste electrodes on the sapphire surface by means of screen printing process; the electrodes are distributed in a ring or grid pattern.

[0009] In some embodiments, the staggered design of the electrode region and the light-emitting region of the vertical cavity surface-emitting laser includes: in the planar layout of the sapphire transparent contact head, the electrode region is set in the annular region at the edge of the contact head, and the light-emitting region of the vertical cavity surface-emitting laser is set in the circular region at the center of the contact head, and the electrode region and the light-emitting region do not overlap in the horizontal projection; or, the electrode deposition region is defined on the sapphire surface by laser masking process, so that the electrode avoids the positive light-emitting path of the vertical cavity surface-emitting laser.

[0010] In some embodiments, controlling the power density and emission angle of the vertical cavity surface-emitting laser (VCSEL) to match the transmittance of the VCSEL with that of the sapphire light-transmitting contact head includes: adjusting the drive current of the VCSEL to maintain the output power density within a preset power density range, while controlling the emission angle of the VCSEL to be less than a preset angle, and combining this with the transmittance of the sapphire light-transmitting contact head to ensure that the thermal effect of the laser in the dermis reaches a preset treatment temperature range.

[0011] In some embodiments, controlling the vertical cavity surface-emitting laser (VCSEL) to output a laser signal and controlling the electrode to conduct EMS microcurrent includes: in phototherapy mode, when the VCSEL outputs a laser signal, the EMS detection circuit uses intermittent pulses to output an EMS microcurrent to the electrode, wherein the pulse frequency of the EMS microcurrent is a non-integer multiple of the modulation frequency of the VCSEL to avoid electromagnetic interference; or, in the skin detection stage, the EMS detection circuit is preferentially operated to output an EMS microcurrent to the electrode, and in the treatment stage, the VCSEL and the EMS detection circuit are operated synchronously.

[0012] In some embodiments, the method further includes: first detecting the moisture and oil state of the skin through the electrodes to obtain the impedance parameters of the skin equivalent circuit; and generating and adjusting the matching vertical cavity surface emission laser power density adjustment value and EMS microcurrent frequency adjustment value based on a preset skin state and treatment parameter mapping model.

[0013] In some embodiments, the method further includes: collecting multiple sets of skin impedance data corresponding to different skin moisture and oil content, as well as corresponding user feedback on microcurrent comfort and phototherapy thermal sensation; training a nonlinear mapping model between skin feature parameters and vertical cavity surface-emitting laser power density and EMS frequency using a machine learning algorithm; and deploying the nonlinear mapping model in the memory corresponding to the multifunctional beauty device.

[0014] Secondly, embodiments of this application provide a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, used to implement the method provided in any embodiment of this application.

[0015] The multifunctional beauty device and phototherapy method based on a laser and a sapphire translucent contact head provided in this application utilizes the vertical light emission and low scattering characteristics of VCSELs, combined with the high light transmittance of the sapphire contact head, to concentrate laser energy onto the dermis layer of the skin. Compared with traditional LED phototherapy, energy utilization is improved, and the heating effect on the dermis layer is more uniform and precise. The staggered design of the sapphire surface electrode and the VCSEL light emission area avoids electrode obstruction of the laser. Simultaneously, the dual insulation and light transmission properties of sapphire achieve physical isolation between the phototherapy optical path and the EMS circuit, eliminating electromagnetic interference and structural conflicts between functions. Based on the skin condition (such as moisture and oil content) obtained by the skin detection circuit, the VCSEL power density and EMS microcurrent parameters are dynamically adjusted to achieve closed-loop control of "detection-adjustment-treatment," improving the treatment safety and comfort for users with different skin types. A single contact head integrates conductive electrodes and a translucent window, reducing the number of components and assembly complexity, making it suitable for various devices such as beauty devices, hair growth combs, and hair removal devices, thus reducing R&D and production costs.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart illustrating the steps of a phototherapy method provided in one embodiment of this application; Figure 2 This is a schematic diagram showing the disassembled sapphire light-transmitting contact head and the main body shell according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, provided in an embodiment of this application. Figure 4 This is an exploded schematic diagram of a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, provided in one embodiment of this application. Figure 5 This is a schematic block diagram of the structure of a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, provided in one embodiment of this application.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0022] It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present invention, the terms "first" and "second" are used in the embodiments of the present invention to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0023] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] In the field of beauty devices, microcurrent (Electrical Muscle Stimulation, EMS) technology delivers microcurrents to the skin through electrodes to stimulate muscle contraction and improve skin laxity. However, traditional phototherapy beauty devices mostly use LEDs as light sources, which have low power density and severe scattering, making it difficult for light energy to be accurately applied to the dermis. Furthermore, the integration of phototherapy modules and EMS modules often leads to functional interference due to structural conflicts (such as electrodes blocking the light source or the heat from the light source affecting circuit stability).

[0026] This application provides a multifunctional cosmetic device and phototherapy method based on a laser and a sapphire transparent contact head. It aims to address the current limitations of existing technologies, which lack solutions for combining a vertical-cavity surface-emitting laser (VCSEL) with a sapphire transparent contact head, and further fail to address the synergistic effect of phototherapy and EMS microcurrents through a staggered design of electrodes and light-emitting areas. Traditional solutions either focus solely on a single EMS or phototherapy function, or employ simple stacking methods when integrating multiple functions, resulting in bulky devices and poor functional compatibility. For example, existing phototherapy devices do not consider the impact of electrode layout on laser emission efficiency, nor do they optimize the coordinated operating parameters of the optical path and circuitry (such as the matching of power density, emission angle, and transmittance) to suit the vertical emission characteristics of VCSELs.

[0027] To solve the above problem, please refer to Figure 1 This application provides a phototherapy method, applied to, for example... Figures 2 to 4 The multifunctional beauty device shown is based on a laser and a sapphire transparent contact head.

[0028] In some embodiments, a multifunctional beauty device includes: a main body housing, a vertical-cavity surface-emitting laser (VCSEL) module, a sapphire translucent contact head, an EMS motherboard, and a skin condition detection circuit; the EMS motherboard is disposed within the main body housing and has an EMS current generating circuit disposed thereon; the sapphire translucent contact head is fixed to the head of the main body housing, and at least two mutually insulated main functional electrode regions (E1, E2) are disposed on its outer surface facing the skin; the VCSEL module is fixed within the main body housing and located inside the sapphire translucent contact head, the VCSEL module emits laser light within a preset wavelength range, and the sapphire translucent contact head has a transmittance matching the light output characteristics and power density of the VCSEL module; the main functional electrode regions (E1, E2) are disposed within the skin surface-emitting laser (E1, E2). E2) The arrangement position on the surface of the sapphire transparent contact head is offset from the projection spot area of ​​the vertical cavity surface-emitting laser module inside the sapphire transparent contact head, so that the main functional electrode area does not block the main beam path of the vertical cavity surface-emitting laser module towards the skin; the EMS motherboard is electrically connected to the main functional electrode area (E1, E2) respectively, so as to conduct the micro-current signal generated by the EMS current generating circuit to the skin through the main functional electrode area (E1, E2); the skin condition detection circuit is integrated on the EMS motherboard and connected to the main functional electrode area (E1, E2). The skin condition detection circuit is used to apply a detection signal to the skin through the main functional electrode area (E1, E2) and receive a feedback signal to determine the skin condition based on the feedback signal.

[0029] For example, such as Figure 4 As shown, the provided multifunctional beauty device includes an upper cover 1, a first strong magnet 2, an inner liner of the upper cover 3, an upper shell of the head 4, sapphire glass 5, EMS electrodes 6, an EMS motherboard 7, a second strong magnet 8, an LED indicator board 9, a head liner 10, a lower shell of the main body 11, a base shell 12, a silicone pad 13, a main shell 14, a data cable interface cover 15 (such as a Type-C cover), a power button 16, a gear selector button 17, a lower shell of the head 18, a battery 19, a motherboard PCB 20, and an upper shell of the main body 21.

[0030] A vertical-cavity surface-emitting laser is integrated into a beauty device, wherein the vertical-cavity surface-emitting laser emits laser light with a wavelength of 650-700nm.

[0031] Specifically, this step aims to utilize red / near-infrared VCSEL lasers with wavelengths of 650-700nm to act on the dermis layer of the skin in a high-energy-density and highly directional manner. Compared to traditional LED light sources, VCSELs have the following core advantages: 1) Vertical light emission: The beam is emitted perpendicular to the chip surface, resulting in a simpler integrated optical path design suitable for compact beauty device structures; 2) High beam quality and low scattering: The small spot size, high brightness, and concentrated energy enable more effective penetration of the epidermis and absorption by dermal tissues (such as collagen fibers and microvessels), achieving highly efficient photostimulation and thermal effects (photodynamic / photothermal effects), rather than being wasted by epidermal scattering; 3) High power density: It is easy to achieve high light power output per unit area, which is crucial for activating biochemical reactions in deep tissues.

[0032] The laser uses VCSEL chips or array modules with specific wavelengths (e.g., 650nm, 700nm, etc.). The wavelength is selected in the 650-700nm range because hemoglobin has a good absorption peak for it, and the tissue penetration depth is moderate, which can efficiently convert light energy into biostimulation energy to promote blood circulation and collagen regeneration.

[0033] Circuit and structural integration includes: Positioning: Integrating the VCSEL laser or array module tightly onto the main unit of the beauty device, or through optical path guides (such as waveguides or lenses), close to or directly opposite the inner side of the sapphire translucent contact head. Drive and control: Such as... Figure 1 The exploded view of the beauty device and the EMS motherboard (which can be expanded to include a motherboard with laser drive circuitry) shown are displayed. The VCSEL drive circuitry is also integrated on this PCB. The drive current, pulse frequency, and duty cycle of the VCSEL are precisely controlled by a microcontroller (MCU) or a dedicated driver IC to achieve safe, effective, and medical-grade phototherapy output. Thermal management: Considering the heat generated during VCSEL operation, metal heat sinks, thermally conductive silicone, fans, or phase change materials are used in the PCB and structural design to ensure the device operates within a safe temperature range, guaranteeing stable light power and product lifespan.

[0034] A sapphire light-transmitting contact head is installed on the beauty device. Electrodes are set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing. The electrode area is designed to be staggered with the light-emitting area of ​​the vertical cavity surface emitter laser to avoid the electrode blocking the light emitted by the laser. The electrode is used to realize the conductive function.

[0035] Specifically, this step creatively uses sapphire as the contact material and processes conductive electrodes onto its surface. This is a design that couples structure and function, with the key being "misalignment design." Sapphire possesses high hardness, wear resistance, high light transmittance (especially in the visible and near-infrared bands), and excellent biocompatibility, making it an ideal material for achieving efficient phototherapy and a pleasant contact experience. The solution of directly fabricating the electrodes on the contact surface is to integrate conductive functionality without occupying additional space. The core idea of ​​misalignment design is to resolve the physical structural conflicts between phototherapy and electrotherapy (EMS), achieving functional synergy rather than mutual interference.

[0036] On the contact surface of sapphire glass, conductive electrodes with specific patterns (such as rings, arcs, dot arrays, etc.) are formed using DPC (direct copper plating) metallization or by screen printing conductive paste (such as silver paste) and sintering. This electrode serves as the generation and conduction electrode for EMS microcurrents and may also function as a sensing electrode in skin detection circuits (such as through capacitance / impedance sensing).

[0037] When designing the electrode pattern, the emission spot area of ​​the VCSEL laser beam is intentionally avoided. For example, the electrodes can surround the spot area or be distributed on both sides of the spot area to ensure that the laser beam can directly and unobstructedly irradiate the skin through the light-transmitting area of ​​the sapphire (the area without electrode coverage).

[0038] The sapphire contact head must be aligned with the optical path of the internal VCSEL. After assembly, the electrode pattern and the VCSEL's output port pattern should be physically "misaligned" and "complementary" in spatial position, meaning the electrode does not cover the output port.

[0039] A reliable electrical connection can be established between the circuitry on the PCB and the electrodes on the skin-contacting surface by pressing down onto the electrode plating / silkscreen pads or contacts on the back or side of the sapphire crystal using connectors such as pogo pins mounted on the motherboard (PCB). This step is the key physical bridge for achieving electrode conductivity.

[0040] Specifically, such as Figure 1 As shown, the provided phototherapy method includes steps S101 to S102. Details are as follows: Step S101. Based on the transmittance of the sapphire light-transmitting contact head, control the power density and emission angle of the vertical cavity surface-emitting laser to match the transmittance of the vertical cavity surface-emitting laser with that of the sapphire light-transmitting contact head, so as to form a heating effect on the dermis of the skin. Specifically, this step is a system-level parameter matching and optimization process aimed at developing a quantifiable, repeatable, and effective method for heating the dermis. It's not simply about turning on the laser, but rather about carefully designing and controlling a set of parameters to ensure that the energy density and spot characteristics applied to the skin achieve the desired therapeutic effect. Power density (power per unit area, W / cm²) 2 The light emission angle directly affects the intensity of the thermal effect; the light emission angle determines the spot size and energy concentration; and the light transmittance of sapphire determines how much laser energy actually reaches the skin. This step requires these three factors to work together to ensure that sufficient, safe, and effective laser energy is absorbed by the dermis, thereby stimulating collagen regeneration, accelerating metabolism, and achieving effects such as firming and skin rejuvenation.

[0041] Based on effective clinical or research data, determine the energy density range required to act on the dermis (e.g., xx W / cm²). 2 By selecting the sapphire contact head and its transmittance (e.g., >90% transmittance for the 650-700nm wavelength range), and considering the transmittance loss, the required light source output power and energy are calculated backwards. Combining the divergence angle of the VCSEL chip (or array) and any subsequent optical lenses, the light emission angle is determined and optimized to control the size and intensity distribution of the light spot on the skin surface, thereby accurately calculating and achieving the target power density.

[0042] During manufacturing, precise optical design is used to fix the relative position and optical path of the VCSEL and sapphire contact head, ensuring the accuracy of the light output angle.

[0043] The product's software (firmware) is programmed with the preset operating mode or power level calculated as described above. When the user uses the product, the MCU outputs the corresponding drive signal (current, pulse parameters) according to the selected mode, precisely controlling the output power of the VCSEL. This, combined with the light transmission characteristics of the sapphire contact head, ultimately creates a safe and effective heating effect on the skin that meets the design expectations.

[0044] Safety monitoring: The implementation plan typically includes a temperature sensor (such as an NTC thermistor attached to the inside of the sapphire) to monitor the contact head temperature in real time, prevent skin burns caused by prolonged irradiation or excessive power, and dynamically adjust the laser power based on feedback (e.g., using a temperature control algorithm).

[0045] Step S102. Control the vertical cavity surface emitter laser to output a laser signal and control the electrodes to conduct EMS microcurrent.

[0046] Specifically, this step embodies the multifunctional integration and synergistic working concept of this application. It achieves dual synergy between "phototherapy (VCSEL laser stimulation)" and "electrotherapy (EMS muscle stimulation)" in both time and space, including: In terms of mechanism of action, light energy mainly acts on skin tissue (blood vessels, collagen), producing thermal effects and photobiological regulation; microcurrent mainly acts on subcutaneous muscle tissue, inducing contraction and relaxation. The combination of the two can comprehensively improve skin firmness and vitality from deep tissue (muscle) to superficial tissue (dermal collagen network), achieving a synergistic beauty effect of "1+1>2".

[0047] Structural Synergy: Through the sapphire contact head with "electrode and light-emitting area misalignment" already implemented in step S102, the parallel execution of the two functions is perfectly supported in terms of physical structure. The electrode is responsible for conducting microcurrents, while the light-transmitting area not covered by the electrode allows the laser to pass through efficiently. The two do not interfere with each other and share the same contact head, achieving high integration.

[0048] The shared electrode design involves the sapphire contact head surface electrodes (as described above) contacting the skin during EMS treatment. Complementary microcurrent signals are generated by the EMS generating circuit and applied to the facial muscles through these two electrodes. The same set of electrodes can also be used as sensing electrodes for skin condition detection.

[0049] Operating mode control includes: Timing control: Different operating modes can be designed in the software logic. For example: Synergistic mode: During the same time period of phototherapy irradiation, EMS microcurrent pulses conforming to safety standards are applied synchronously, realizing simultaneous phototherapy and EMS. Sequential mode: Phototherapy is performed by VCSEL for a period of time first, and then it switches to EMS microcurrent mode, or vice versa. Programmable control: The MCU controls the phototherapy drive circuit and EMS generation circuit to work alternately or synchronously according to the preset program, based on the set timing and parameters. Just as "the skin detection circuit and the EMS generation circuit will not work simultaneously," the optimal synergistic timing of phototherapy and EMS can also be designed based on safety and efficacy studies.

[0050] This collaborative working mode can be further upgraded. First, skin moisture / oil status is detected by using a shared electrode (capacitance / impedance method). Then, based on the skin condition, the power / time of phototherapy and the current intensity / frequency of EMS are adjusted simultaneously or separately to provide a highly personalized, safe, comfortable and efficient comprehensive care solution.

[0051] In some embodiments, the beauty device integrates a vertical-cavity surface-emitting laser, comprising: setting at least one vertical-cavity surface-emitting laser array on the motherboard of the beauty device, the vertical-cavity surface-emitting laser array being electrically connected to the motherboard via a flexible circuit board, and the light emission direction of each vertical-cavity surface-emitting laser being perpendicular to the surface of the sapphire light-transmitting contact head, wherein the wavelength of the vertical-cavity surface-emitting laser is a continuous wave or pulsed wave of 650-700nm.

[0052] This embodiment clarifies the physical integration scheme and basic optical characteristics of a vertical-cavity surface-emitting laser (VCSEL) within a cosmetic device. The core element lies in using an "array" configuration to increase total output power and irradiation area, connected via a "flexible printed circuit board (FPC)" to address layout and assembly tolerance issues within a compact space. Simultaneously, it specifies the laser's wavelength range (650-700nm) and waveform (continuous or pulsed), laying the foundation for subsequent power control and treatment effectiveness.

[0053] The mounting positions of the VCSEL array are planned on the motherboard (PCB) of the beauty device. This array can consist of multiple VCSEL chip units integrated into a single package in a specific arrangement (such as rectangular or circular). FPC was chosen because its flexibility allows for better adaptation to potential non-parallel spaces or vibration damping requirements between the motherboard and sapphire contacts.

[0054] The electrical pins of the VCSEL array are connected to one end of the FPC via soldering or connectors, while the other end of the FPC is connected to the motherboard via connectors or soldering. The microcontroller (MCU) or dedicated driver chip on the motherboard provides precisely controlled drive current to the VCSEL array through traces on the FPC.

[0055] During the structural design, it is ensured that after the VCSEL array is installed, its inherent vertical light output direction is basically perpendicular to the inner surface of the sapphire light-transmitting contact head, so as to ensure that the laser energy can pass through the sapphire and act on the skin most efficiently, reducing interface reflection loss.

[0056] By programming the device firmware, the MCU can output drive signals in different modes: for continuous waves, it outputs stable DC or low-frequency PWM current; for pulse waves, it outputs high-frequency pulse current with a specific duty cycle to achieve different heat accumulation effects and stimulation modes.

[0057] In some embodiments, the beauty device is provided with a sapphire light-transmitting contact head, including: the sapphire light-transmitting contact head is an arc-shaped structure with a light transmittance greater than a preset light transmittance, the surface of the sapphire light-transmitting contact head that contacts the skin is optically polished, and an anti-reflection film is coated inside or on the surface of the sapphire substrate.

[0058] This embodiment focuses on improving the optical performance of the sapphire contact head itself. It ensures a good fit to the facial contours by defining an "arc structure," and maximizes the laser transmittance by setting a "high light transmittance" target and requiring specific processes such as "optical polishing" and "anti-reflective coating." This ensures that the preset power density can actually act on the skin and avoids ineffective energy loss at the contact head.

[0059] By selecting high-quality synthetic sapphire raw materials, it is first processed into an ergonomic arc shape through CNC engraving or hot bending. Subsequently, the outer surface in contact with the skin and / or the inner surface opposite the laser are precisely optically polished to achieve a mirror-like finish, minimizing scattering.

[0060] After polishing, one or more antireflective coatings of specific optical thicknesses are deposited on the surface of the sapphire (usually both the inner and outer sides) using vacuum coating technology (such as physical vapor deposition, PVD). This coating system is specifically optimized for the 650-700nm wavelength range, for example, by using low refractive index materials such as MgF2 to reduce the reflectivity of one side, thereby significantly improving the overall light transmittance.

[0061] During the manufacturing process, a spectrophotometer is used to test the transmittance of the finished sapphire contact head to ensure that it exceeds the preset standard.

[0062] In some embodiments, the electrode is set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing, including: forming a metal electrode layer with a thickness of a preset thickness range on the sapphire surface by means of direct copper plating process, or printing silver paste electrodes on the sapphire surface by means of screen printing process; the electrodes are distributed in a ring or grid pattern.

[0063] This embodiment details two feasible manufacturing processes (DPC and screen printing) for forming conductive electrodes on the high-hardness, inert surface of sapphire, and provides possible electrode shapes (ring-shaped, mesh-shaped). This provides a clear engineering path for achieving reliable and efficient electrical connections on non-traditional substrates.

[0064] The DPC process includes: Pretreatment: Cleaning and activating the sapphire surface to enhance the adhesion of the metal layer. Patterning: Defining the electrode pattern on the sapphire surface using photolithography. Deposition: Sequentially depositing a seed layer and electroplating to thicken it, forming a copper electrode of the desired thickness (e.g., 10-50 micrometers). Subsequent surface treatments, such as gold or nickel plating, can be performed to prevent oxidation and ensure biocompatibility.

[0065] The screen printing process includes: Plate making: Creating a screen printing plate based on the electrode design pattern. Printing: Using a squeegee, conductive silver paste is applied to the sapphire surface through a screen. Sintering: The sapphire with the silver paste is placed in a sintering furnace and heat-treated at a specific temperature profile (e.g., several hundred degrees Celsius). This melts the glass powder in the silver paste and bonds it to the sapphire surface, while the silver particles form conductive pathways. After solidification, the electrodes are formed. Pattern design: Based on the overall design of the beauty device, the electrodes are designed as a ring around the outer edge of the light-emitting area or a grid covering the non-light-emitting area to maximize the light-transmitting area while ensuring conductive area and uniformity.

[0066] In some embodiments, the staggered design of the electrode region and the light-emitting region of the vertical cavity surface-emitting laser includes: in the planar layout of the sapphire transparent contact head, the electrode region is set in the annular region at the edge of the contact head, and the light-emitting region of the vertical cavity surface-emitting laser is set in the circular region at the center of the contact head, and the electrode region and the light-emitting region do not overlap in the horizontal projection; or, the electrode deposition region is defined on the sapphire surface by laser masking process, so that the electrode avoids the positive light-emitting path of the vertical cavity surface-emitting laser.

[0067] This embodiment provides two specific spatial planning or manufacturing methods for realizing "misaligned design". The core objective is to ensure an unobstructed laser beam path, avoiding absorption, reflection, or obstruction of light energy by the electrodes, thereby guaranteeing phototherapy efficiency.

[0068] The planar layout method clearly delineates areas on a two-dimensional design drawing of the sapphire contact head. For example, a circular area with a diameter of X millimeters at the center is defined as the "light-emitting area," which must not be covered by any electrodes; the edge area with a width of Y millimeters surrounding this circle is defined as the "electrode area." In this way, the electrodes and the light-emitting area are separate and do not overlap in a horizontal projection.

[0069] The masking process utilizes laser masks instead of photolithography in deposition processes such as DPC. First, a laser is used to micro-machine the areas of the sapphire surface where electrodes will be formed, creating a roughened or modified layer to enhance adhesion, while the areas where light transmission is desired remain smooth. During subsequent deposition, the metal adheres firmly only to the laser-treated areas, thus "automatically" avoiding the light path. This is a more precise and integrated forming technology.

[0070] In some embodiments, controlling the power density and emission angle of the vertical cavity surface-emitting laser (VCSEL) to match the transmittance of the VCSEL with that of the sapphire light-transmitting contact head includes: adjusting the drive current of the VCSEL to maintain the output power density within a preset power density range, while controlling the emission angle of the VCSEL to be less than a preset angle, and combining this with the transmittance of the sapphire light-transmitting contact head to ensure that the thermal effect of the laser in the dermis reaches a preset treatment temperature range.

[0071] By adjusting the drive current to control the power density and constrain the light emission angle, the ultimate goal is to bring the dermis to a preset, effective treatment temperature range. This effectively defines a patentable method for heating the dermis.

[0072] Parameter presets: Based on clinical studies, key parameters are preset in the device firmware: target power density range (e.g., 0.5 - 2 W / cm²). 2 ), maximum light emission angle (e.g., <15°) and desired dermal treatment temperature range (e.g., 40-45°C).

[0073] The MCU outputs an initial drive current to the VCSEL based on the selected treatment mode. The VCSEL emits light with its inherent small divergence angle, and the beam passes through the high-transmittance sapphire contact head.

[0074] Through this precise control, the energy reaching the skin is ensured to be calculated and calibrated, rather than applied blindly. Ultimately, the thermal effect (indirectly monitored by a built-in temperature sensor or calculated through a theoretical model) is controlled within a preset treatment window, effectively stimulating collagen regeneration while avoiding the risk of burns.

[0075] In some embodiments, controlling the vertical cavity surface-emitting laser (VCSEL) to output a laser signal and controlling the electrode to conduct EMS microcurrent includes: in phototherapy mode, when the VCSEL outputs a laser signal, the EMS detection circuit uses intermittent pulses to output an EMS microcurrent to the electrode, wherein the pulse frequency of the EMS microcurrent is a non-integer multiple of the modulation frequency of the VCSEL to avoid electromagnetic interference; or, in the skin detection stage, the EMS detection circuit is preferentially operated to output an EMS microcurrent to the electrode, and in the treatment stage, the VCSEL and the EMS detection circuit are operated synchronously.

[0076] This embodiment addresses the potential mutual interference problem that may occur when two high-power / high-light systems, phototherapy and EMS, operate simultaneously. It also provides two specific collaborative timing strategies to achieve functional "coordination" rather than simply "simultaneous coexistence."

[0077] The firmware is configured so that the EMS function is activated simultaneously when the phototherapy function is turned on. However, the EMS does not use continuous output, but rather intermittent pulses (e.g., 100ms of operation followed by 100ms of pause).

[0078] Simultaneously, the pulse frequency of the EMS (e.g., f_EMS = 33Hz) and the modulation frequency of the VCSEL (e.g., f_Laser = 1kHz) are carefully designed to ensure that the frequency ratio between the two is a non-integer multiple (e.g., 1kHz / 33Hz ≈ 30.3). This avoids generating a stable beat frequency, thereby effectively suppressing the impact of potential electromagnetic interference (EMI) on internal precision measurement circuits (such as skin detection).

[0079] At the start of treatment, the MCU first controls the circuit to switch to "skin detection" mode. At this time, the EMS generation circuit does not work, but the electrodes are used as sensors.

[0080] After the test is completed, the MCU controls the VCSEL drive circuit and the EMS generator circuit to work simultaneously. At this time, the EMS can use parameters that are more suitable for phototherapy (such as lower current and different waveforms).

[0081] In some embodiments, the method further includes: first detecting the moisture and oil state of the skin through the electrodes to obtain the impedance parameters of the skin equivalent circuit; and generating and adjusting the matching vertical cavity surface emission laser power density adjustment value and EMS microcurrent frequency adjustment value based on a preset skin state and treatment parameter mapping model.

[0082] This embodiment connects skin condition detection, EMS microcurrent adjustment, and phototherapy power adjustment in series to form a complete and personalized intelligent beauty solution. It uses a shared electrode to perform a diagnosis first, and then automatically adjusts the treatment parameters (laser power, EMS frequency) based on the diagnosis results (impedance parameters), solving the problem of poor experience or ineffective results caused by "individual differences".

[0083] The MCU outputs a high-frequency detection signal to the electrode through the NET2 port and reads the returned voltage / signal through the NET1 port, and calculates the equivalent impedance of the skin at this time through an algorithm.

[0084] The device's memory contains a pre-stored "skin condition-treatment parameter mapping table." This table contains verified optimal VCSEL power and EMS frequency corresponding to different impedance ranges.

[0085] The MCU compares the calculated real-time impedance with the mapping table to find the best matching set of parameters. Then, it automatically adjusts the drive current of the VCSEL to the corresponding power density and adjusts the output frequencies of EMS-A and EMS-B to the corresponding values.

[0086] The equipment operates phototherapy and EMS functions according to the adjusted new parameters, providing users with customized care.

[0087] In some embodiments, the method further includes: collecting multiple sets of skin impedance data corresponding to different skin moisture and oil content, as well as corresponding user feedback on microcurrent comfort and phototherapy thermal sensation; training a nonlinear mapping model between skin feature parameters and vertical cavity surface-emitting laser power density and EMS frequency using a machine learning algorithm; and deploying the nonlinear mapping model in the memory corresponding to the multifunctional beauty device.

[0088] This embodiment is an advanced and automated version of the above embodiments. It introduces machine learning to build a smarter and more accurate nonlinear mapping model to replace or optimize the preset simple mapping table. This enables the device to handle more complex skin conditions and may discover optimal parameter combinations that cannot be summarized by human experience, representing a higher level of intelligence.

[0089] In laboratory or early user studies, a large amount of sample data is collected. Each data point includes: skin moisture value, oil value (or directly measured impedance spectrum), user comfort rating of the current EMS, and user acceptance rating of the phototherapy heat sensation.

[0090] Using this data as a training set, a machine learning algorithm (e.g., Gradient Boosting Decision Tree (GBDT), neural network, etc.) is employed for training. The model learns the complex nonlinear relationship between "skin characteristics (moisture, oil / impedance)" and "optimal treatment parameters (VCSEL power, EMS frequency)".

[0091] The trained and validated model (usually a set of parameters and calculation rules) is compiled into code, embedded into the firmware of the beauty device, and stored in memory accessible to the MCU (such as Flash).

[0092] When the user uses the device, the skin impedance data detected by the device is used as input to the model for calculation. The model directly outputs recommended power density adjustment values ​​and EMS frequency adjustment values. The system can also record user feedback after each treatment (e.g., via an app) for continuous model fine-tuning and personalized long-term optimization.

[0093] In some embodiments, this embodiment, based on the above embodiment (based on single-detection parameter adjustment), further proposes a real-time, dynamic closed-loop control system. It not only performs detection before treatment but also continuously monitors changes in skin impedance sensed through electrodes during EMS microcurrent treatment, and accordingly fine-tunes the EMS output current in real time. This ensures that the stimulation intensity remains within the user's optimal comfort range throughout the entire treatment process, effectively addressing the issue of excessively strong or weak current sensing caused by dynamic changes in skin conductivity.

[0094] When the user turns on the device and selects EMS mode, the device first performs an initial skin detection and sets an initial EMS frequency and current intensity.

[0095] During the intermittent periods of EMS current output (such as the pulse off-peak period), or when an imperceptible high-frequency detection signal is superimposed, the MCU quickly switches the circuit to detection mode. The detection signal is sent via NET2, and the return value is read from NET1 to quickly calculate the real-time skin impedance.

[0096] The MCU compares the real-time impedance to the initial impedance or a preset "comfortable impedance range." If the real-time impedance increases (indicating dry skin or poor contact, resulting in a weakened actual perceived current), the MCU proportionally increases the drive voltage or pulse width of the EMS output circuit according to a preset algorithm to maintain a stable stimulation sensation. If the real-time impedance decreases (indicating increased conductivity, which may cause the user to feel excessive current), the MCU reduces the EMS output to avoid discomfort. This "treatment-sampling-adjustment" cycle operates at a very high frequency (e.g., several times per second) throughout the treatment, forming a truly adaptive intelligent system.

[0097] In some embodiments, a VCSEL array containing different wavelengths (such as 650nm red light and 850nm near-infrared light) is used, and a time-division driving strategy and a wavelength selection logic based on skin condition are innovatively proposed. This solves the problem of the limitation of single-wavelength phototherapy function and realizes "one machine, multiple effects" and "on-demand allocation".

[0098] The VCSEL array is no longer a single wavelength, but consists of multiple independent VCSEL subarrays that emit different wavelengths. They are physically integrated but circuitically independent and controllable.

[0099] The MCU drives different wavelength sub-arrays at different times through independent drive channels. For example: Phase 1 (skin rejuvenation): drives a 650nm red photon array to stimulate collagen. Phase 2 (soothing): drives an 850nm near-infrared photon array, utilizing its stronger penetration for deep soothing and repair. This avoids potential interference or uncontrolled thermal effects from simultaneous output of different wavelengths, while also simplifying optical design. The MCU intelligently selects the activation wavelengths and sequence based on detected skin conditions (e.g., low moisture, high oil). For example, for dry skin, it prioritizes and extends the treatment time of 850nm to promote repair.

[0100] In some embodiments, the EMS function itself has been enhanced. A single electrode on the sapphire contact head is precisely divided into multiple mutually insulated electrode partitions using a DPC process. The MCU can control the EMS generating circuit to output microcurrents of different frequencies and waveforms to different electrode partitions. This enables more targeted and differentiated stimulation of different facial muscle groups (such as the forehead, around the eyes, and cheeks), improving the precision and effectiveness of EMS beauty treatments.

[0101] The traditional ring electrode is redesigned as a concentric ring electrode or a sector-shaped partitioned electrode. Each partition is connected to the motherboard via an independent pogo pin. The EMS generation circuit can be designed as multi-channel, or the output can be switched via a multiplexer.

[0102] Mode A (Lift): Outputs a higher frequency (e.g., 50Hz) current to the inner electrode pair for tightening the contour; outputs a lower frequency (e.g., 10Hz) current to the outer electrode pair for promoting circulation. The MCU can activate different zones sequentially to simulate a "lifting" technique. Combined with closed-loop control, the current intensity can be adjusted independently for each zone.

[0103] In some embodiments, this embodiment elevates machine learning from a single treatment to the level of user lifecycle management. It builds a personalized long-term efficacy optimization model for each user in the cloud or on the device by recording the user's historical usage data (frequency, duration, parameters) and subjective efficacy feedback (input via an app). This system learns the user's best care habits and evolves as the user's skin condition changes, providing an unparalleled long-term personalized experience.

[0104] The device not only collects skin impedance data before each treatment, but also records the actual EMS frequency used, phototherapy power, and treatment duration. After treatment, users are guided to rate the "tightening," "comfort," and "moisturizing" sensations experienced during the treatment via a mobile app.

[0105] Within the device's MCU, a basic model is fine-tuned and its parameters are recommended based on recent usage records and feedback. After obtaining user authorization, the data is uploaded to the cloud. The cloud aggregates a large amount of anonymized data to train a more powerful general-purpose model, and can periodically distribute the optimized model parameters to the user's device.

[0106] After a period of learning, the system can proactively recommend the "best skincare routine of the week" to users, such as: "We have detected skin fatigue during the week. We recommend using 10 minutes of intense light therapy + low-frequency EMS mode." This transforms the beauty device from a passive tool into a proactive, understanding "personal beauty consultant."

[0107] In some embodiments, addressing the limitations of a single pre-treatment skin test in the above embodiments, this embodiment proposes to collect the skin's dynamic response (temperature, impedance changes) in real time during treatment, and adjust the VCSEL phototherapy parameters (power density, light emission angle) and EMS microcurrent parameters (pulse frequency, current intensity) in real time through a model predictive control (MPC) algorithm to ensure that the skin's dermal temperature is maintained at 40-42℃ (the optimal collagen stimulation range), while maintaining the user's comfort with EMS (avoiding stinging caused by excessive current).

[0108] The "pre-adjustment" has been upgraded to "real-time closed-loop adjustment" to solve the parameter mismatch problem caused by changes in skin condition during phototherapy (such as increased impedance and temperature due to moisture evaporation).

[0109] In the non-light-emitting area at the edge of the sapphire light-transmitting contact head, a miniature NTC thermistor (for direct detection of skin surface temperature) is integrated using the DPC process, or the impedance detection function of the EMS electrode is utilized (to indirectly reflect changes in skin temperature, as an increase in temperature will cause a decrease in skin impedance).

[0110] Real-time acquisition of three types of data: VCSEL status data: drive current (via current sensor), junction temperature (via temperature sensor inside VCSEL package); skin dynamic data: skin surface temperature (NTC thermistor), skin impedance (high-frequency detection signal of EMS electrode, such as 100kHz); user feedback data: real-time collection of user "comfort rating" (such as "0=stinging", "1=comfortable", "2=no feeling") via device buttons or APP.

[0111] Model Predictive Control (MPC) Algorithm: Input: Real-time collected VCSEL state data, skin dynamic data, and user feedback data; Model Construction: Establish mathematical models (such as transfer function models) for "VCSEL power density-skin temperature" and "EMS frequency-skin impedance-user comfort" through offline experiments; Optimization Objective: Minimize the deviation of skin temperature from the target range (40-42℃) while maximizing the user comfort score; Output: VCSEL power density adjustment value (e.g., from 100mW / cm² to 80mW / cm²) and EMS pulse frequency adjustment value (e.g., from 50Hz to 30Hz).

[0112] The MCU runs the MPC algorithm every 100ms, sending the adjusted parameters to the VCSEL driver circuit and the EMS generator circuit to achieve a closed-loop cycle of "acquisition-calculation-adjustment".

[0113] In some embodiments, in view of the limitations of the machine learning mapping model in the above embodiments (based only on skin impedance and feedback data), this embodiment proposes to integrate long-term user behavior data (lifestyle habits, environmental factors) and skin state evolution data, and establish a time series model of "skin state-behavior-phototherapy effect" through recurrent neural network (RNN) to generate personalized phototherapy modes at the weekly / monthly level (such as "deep repair on Monday" and "tightening and lifting on Wednesday"), so as to solve the problem that "fixed modes are difficult to adapt to changes in skin state over time (such as seasons and work and rest)".

[0114] By expanding static skin characteristics into dynamic evolutionary characteristics and combining them with lifestyle habits to predict skin needs, intelligent phototherapy can achieve "adaptation in advance".

[0115] Data collection includes: Skin condition data: moisture and oil impedance data detected by EMS electrodes before each treatment (stored as a time series); Behavioral data: user's lifestyle habits (such as sleep time, water intake, and exercise frequency) and environmental data (such as humidity and temperature in the city) collected through the APP; Effect data: subjective feedback from users after treatment (such as "firmness" and "moisturization" ratings) and objective data from skin testing devices (such as home skin testers) (such as collagen content).

[0116] RNN Model Training: Input: Skin condition time series for 4 consecutive weeks (e.g., impedance data every Monday), corresponding behavioral data (e.g., weekly sleep time); Output: Skin condition prediction for the next week (e.g., "Skin moisture will decrease by 10% next week"), recommended phototherapy mode (e.g., "Increase 850nm near-infrared phototherapy time by 2 minutes"); Training process: Train the RNN model using collected multi-user data to learn the correlation between "behavior-skin condition-phototherapy effect" (e.g., "less than 6 hours of sleep → decreased skin moisture → need to increase near-infrared phototherapy").

[0117] The device obtains the user's weekly behavioral data (such as "slept 5 hours every day this week") through the APP, inputs it into a trained RNN model, and predicts the skin condition for the following week (such as "skin moisture will drop to 30% and oil will rise to 25% next week"). Based on the prediction results, a weekly care plan is generated (such as: Monday: "Deep Repair Mode" (850nm near-infrared light therapy for 10 minutes + 10Hz EMS); Wednesday: "Firming Mode" (650nm red light therapy for 8 minutes + 50Hz EMS); Friday: "Balancing Mode" (650nm + 850nm alternating light therapy for 12 minutes + 30Hz EMS).

[0118] Before each treatment on Monday, the device re-detects the skin condition. If the actual condition does not match the prediction (e.g., "predicted moisture 30%, actual 25%)", the RNN model is updated through incremental learning, and the phototherapy mode for the week is adjusted (e.g., "increase the near-infrared phototherapy time to 12 minutes").

[0119] In some embodiments, in response to the limitations of the original embodiment which relies solely on a single feedback of "skin impedance", this embodiment proposes to integrate feedback signals from three modalities (skin impedance, light reflectance, and user expression). These signals are integrated using the Transformer multimodal fusion algorithm, and the VCSEL and EMS parameters are optimized to solve the problem that "a single feedback cannot fully reflect the user experience and treatment effect".

[0120] By fusing "physical signals" (impedance, light reflectivity) with "biological signals" (facial expressions), more precise parameter adjustments can be achieved.

[0121] Multimodal data acquisition includes: Physical signal 1 (skin impedance): acquired through high-frequency detection signal (100kHz) of EMS electrode, reflecting changes in skin moisture and temperature; Physical signal 2 (light reflectivity): integrated below the central light-emitting area of ​​the sapphire contact head, a PD photodiode (used to detect the intensity of light reflected back from the skin after VCSEL emission) is used to reflect the skin's absorption of light (e.g., skin with high moisture content has low reflectivity and good absorption). Biosignals (user facial expressions): The front-facing camera of the mobile app captures the user's facial expressions (such as frowning and smiling) during treatment, and the CNN expression recognition algorithm is used to determine the user's comfort level (such as "frowning = stinging" and "smiling = comfortable").

[0122] Transformer multimodal fusion includes: Input: Skin impedance time series (e.g., impedance value within 10 seconds, shape [10,1]); Light reflectance time series (e.g., reflected light intensity within 10 seconds, shape [10,1]); Facial feature vector (e.g., "frowning degree" and "smiling degree" extracted by CNN, shape [1,5]); Processing: Learning the correlation between the three modalities using Transformer's multi-head attention mechanism (e.g., "decreased light reflectance + increased impedance → good skin absorption, VCSEL power can be increased; facial expression recognition is 'frowning' → EMS current is too strong, frequency needs to be reduced"); Output: VCSEL power density adjustment value (e.g., "+10mW / cm²"), EMS frequency adjustment value (e.g., "-20Hz").

[0123] The device collects multimodal data every 2 seconds, inputs it into the Transformer model, outputs the adjusted parameters, and sends them to the VCSEL drive circuit and EMS generator circuit to achieve a closed loop of "multi-signal fusion → intelligent judgment → precise adjustment".

[0124] In some embodiments, in response to the limitations of the original embodiment's fixed phototherapy mode (such as red light phototherapy only), this embodiment proposes to use reinforcement learning (RL) algorithm to allow the device to automatically explore the optimal phototherapy mode (including VCSEL wavelength combination, light emission sequence, and EMS coordination mode). By using "user feedback" as a reward signal, the optimal mode for the user is gradually generated, solving the problem that "traditional modes are difficult to adapt to individual differences (such as different users having different sensitivities to light intensity and current)".

[0125] Upgrade the "manual design mode" to the "device self-learning mode" to achieve personalized exploration "from 0 to 1".

[0126] Reinforcement learning framework definition: Intelligent Agent: The MCU of the multi-functional beauty device; Action Space: Wavelength selection (650nm, 850nm) and power density (low = 50mW / cm², medium = 100mW / cm²) of the VCSEL. 2 Height = 150mW / cm 2 ), light emission sequence (red first then near-infrared, near-infrared first then red, alternating); EMS frequency (10Hz, 30Hz, 50Hz), pulse mode (continuous, intermittent); State space: current skin impedance data (moisture, oil), VCSEL operating parameters (wavelength, power), EMS operating parameters (frequency, pulse); Reward signal: user feedback after treatment (e.g., "good effect" +10 points, "uncomfortable" -5 points, "no feeling" +0 points).

[0127] Self-learning process: Initial stage (exploration period): The device randomly selects actions (e.g., "650nm high power + 50Hz continuous EMS") and records user feedback (e.g., "uncomfortable" deducts 5 points); Learning stage (utilization period): Through the DQN (Deep Q Network) algorithm, the state and actions are mapped to "expected rewards" (e.g., the expected reward for "selecting 650nm medium power + 10Hz intermittent EMS" is +8 points), and actions that can obtain high rewards are gradually selected; Optimization stage (stabilization period): After 10-20 treatments, the device will generate the optimal phototherapy mode for the user (e.g., "650nm medium power + 10Hz intermittent EMS + alternating red and near-infrared light emission") and store it in the device's Flash memory.

[0128] During subsequent treatments, the device automatically loads the optimal mode; if the user's skin condition changes (such as seasonal changes causing a decrease in moisture), the device will re-enter the "exploration period" (such as trying "850nm medium power + 30Hz EMS"), collect new feedback, and update the optimal mode.

[0129] In some embodiments, for scenarios where users "simultaneously use home beauty devices and professional beauty devices," this embodiment proposes using a transfer learning algorithm to transfer treatment parameters from professional devices to home devices, solving the problem of "complex parameter settings for home devices (e.g., users do not know how to adjust VCSEL power)." The core innovation is achieving "personalized parameter synchronization across devices," allowing home devices to inherit the treatment experience of professional devices.

[0130] The data collection for the clinic includes: the collection of treatment data from clinic beauty devices (such as higher-powered VCSEL phototherapy devices) on users: skin test data (pre-treatment moisture, oil resistance); treatment parameters (VCSEL wavelength, power density, light emission time; EMS frequency, current); treatment effects (collagen content of clinic skin testers, user feedback).

[0131] Transfer learning model training: Source Domain: Treatment data from theatrical equipment; Target Domain: Treatment data from home-based equipment (e.g., VCSEL power density limit of 100mW / cm²). 2 200mW / cm below the cinema standard 2 ); Model training: Using a domain adaptation algorithm, the mapping relationship between "skin condition - treatment parameters" from cinema equipment is transferred to home equipment (e.g., "cinema equipment with 200mW / cm²"). 2 650nm red light → 100mW / cm for home use 2650nm red light, but maintaining the same energy density (power × time).

[0132] Users upload hospital treatment data to the cloud via the app; home devices download the hospital data from the cloud, input it into a transfer learning model, and generate adaptation parameters for the home devices (e.g., "200mW / cm² × 5 minutes for hospital use → 100mW / cm² for home use"). 2 ×10 minutes); Home devices adjust parameters through incremental learning based on adaptation parameters and user feedback on home treatment (such as "comfort score") (e.g., "shorten 10 minutes to 8 minutes because user feedback 'it's a bit hot'").

[0133] Please see Figure 5 , Figure 5 This is a schematic block diagram of the structure of a multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, according to an embodiment of this application. The multifunctional beauty device includes a processor, a memory, and a network interface connected via a device bus, wherein the memory may include a storage medium and internal memory.

[0134] The storage medium can store operating devices and computer programs. The computer program includes program instructions that, when executed, cause the processor to perform any phototherapy method.

[0135] The processor provides computing and control capabilities to support the operation of the entire multifunctional beauty device based on laser and sapphire translucent contact heads.

[0136] Internal memory provides an environment for the execution of computer programs in non-volatile storage media, which, when executed by a processor, enable the processor to perform any phototherapy method.

[0137] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the terminal to which the present application is applied. The specific multifunctional beauty device based on laser and sapphire light-transmitting contact head may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0138] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0139] In one embodiment, the processor is configured to run a computer program stored in memory to perform the following steps: Based on the light transmittance of the sapphire light-transmitting contact head, the power density and emission angle of the vertical cavity surface-emitting laser are controlled to match the light transmittance of the vertical cavity surface-emitting laser with that of the sapphire light-transmitting contact head, so as to form a heating effect on the dermis of the skin. The vertical cavity surface emitter laser is controlled to output a laser signal, and the electrodes are controlled to conduct EMS microcurrents.

[0140] In some embodiments, the beauty device integrates a vertical-cavity surface-emitting laser, comprising: setting at least one vertical-cavity surface-emitting laser array on the motherboard of the beauty device, the vertical-cavity surface-emitting laser array being electrically connected to the motherboard via a flexible circuit board, and the light emission direction of each vertical-cavity surface-emitting laser being perpendicular to the surface of the sapphire light-transmitting contact head, wherein the wavelength of the vertical-cavity surface-emitting laser is a continuous wave or pulsed wave of 650-700nm.

[0141] In some embodiments, the beauty device is provided with a sapphire light-transmitting contact head, including: the sapphire light-transmitting contact head is an arc-shaped structure with a light transmittance greater than a preset light transmittance, the surface of the sapphire light-transmitting contact head that contacts the skin is optically polished, and an anti-reflection film is coated inside or on the surface of the sapphire substrate.

[0142] In some embodiments, the electrode is set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing, including: forming a metal electrode layer with a thickness of a preset thickness range on the sapphire surface by means of direct copper plating process, or printing silver paste electrodes on the sapphire surface by means of screen printing process; the electrodes are distributed in a ring or grid pattern.

[0143] In some embodiments, the staggered design of the electrode region and the light-emitting region of the vertical cavity surface-emitting laser includes: in the planar layout of the sapphire transparent contact head, the electrode region is set in the annular region at the edge of the contact head, and the light-emitting region of the vertical cavity surface-emitting laser is set in the circular region at the center of the contact head, and the electrode region and the light-emitting region do not overlap in the horizontal projection; or, the electrode deposition region is defined on the sapphire surface by laser masking process, so that the electrode avoids the positive light-emitting path of the vertical cavity surface-emitting laser.

[0144] In some embodiments, controlling the power density and emission angle of the vertical cavity surface-emitting laser (VCSEL) to match the transmittance of the VCSEL with that of the sapphire light-transmitting contact head includes: adjusting the drive current of the VCSEL to maintain the output power density within a preset power density range, while controlling the emission angle of the VCSEL to be less than a preset angle, and combining this with the transmittance of the sapphire light-transmitting contact head to ensure that the thermal effect of the laser in the dermis reaches a preset treatment temperature range.

[0145] In some embodiments, controlling the vertical cavity surface-emitting laser (VCSEL) to output a laser signal and controlling the electrode to conduct EMS microcurrent includes: in phototherapy mode, when the VCSEL outputs a laser signal, the EMS detection circuit uses intermittent pulses to output an EMS microcurrent to the electrode, wherein the pulse frequency of the EMS microcurrent is a non-integer multiple of the modulation frequency of the VCSEL to avoid electromagnetic interference; or, in the skin detection stage, the EMS detection circuit is preferentially operated to output an EMS microcurrent to the electrode, and in the treatment stage, the VCSEL and the EMS detection circuit are operated synchronously.

[0146] In some embodiments, the method further includes: first detecting the moisture and oil state of the skin through the electrodes to obtain the impedance parameters of the skin equivalent circuit; and generating and adjusting the matching vertical cavity surface emission laser power density adjustment value and EMS microcurrent frequency adjustment value based on a preset skin state and treatment parameter mapping model.

[0147] In some embodiments, the method further includes: collecting multiple sets of skin impedance data corresponding to different skin moisture and oil content, as well as corresponding user feedback on microcurrent comfort and phototherapy thermal sensation; training a nonlinear mapping model between skin feature parameters and vertical cavity surface-emitting laser power density and EMS frequency using a machine learning algorithm; and deploying the nonlinear mapping model in the memory corresponding to the multifunctional beauty device.

[0148] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of the phototherapy method provided in any embodiment of this application.

[0149] The computer-readable storage medium can be an internal storage unit of the multifunctional beauty device based on a laser and a sapphire light-transmitting contact head as described in the foregoing embodiments, such as a hard drive or memory of the multifunctional beauty device based on a laser and a sapphire light-transmitting contact head. Alternatively, the computer-readable storage medium can be an external storage device of the multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, such as a plug-in hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the multifunctional beauty device based on a laser and a sapphire light-transmitting contact head.

[0150] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A phototherapy method, characterized in that, The method is applied to a multifunctional beauty device based on a laser and a sapphire transparent contact head. The beauty device integrates a vertical cavity surface-emitting laser, which emits a laser with a wavelength of 650-700nm. The beauty device is equipped with a sapphire light-transmitting contact head, and electrodes are set on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing; the vertical cavity surface-emitting laser emits light toward the contact head, wherein the electrode area and the light-emitting area of ​​the vertical cavity surface-emitting laser are designed to be staggered to avoid the electrode blocking the light emission of the laser, and the electrode is used to realize the conductive function. The method includes: Based on the light transmittance of the sapphire light-transmitting contact head, the power density and emission angle of the vertical cavity surface-emitting laser are controlled to match the light transmittance of the vertical cavity surface-emitting laser with that of the sapphire light-transmitting contact head, so as to form a heating effect on the dermis of the skin. The vertical cavity surface emitter (VCSEL) is controlled to output a laser signal, and the electrodes are controlled to conduct EMS microcurrents.

2. The method according to claim 1, characterized in that, The beauty device integrates a vertical-cavity surface-emitting laser, including: At least one vertical cavity surface-emitting laser array is provided on the main board of the beauty device. The vertical cavity surface-emitting laser array is electrically connected to the main board through a flexible circuit board, and the light emission direction of each vertical cavity surface-emitting laser is perpendicular to the surface of the sapphire light-transmitting contact head. The wavelength of the vertical cavity surface-emitting laser is a continuous wave or pulsed wave of 650-700nm.

3. The method according to claim 1, characterized in that, The beauty device is equipped with a sapphire light-transmitting contact head, including: The sapphire light-transmitting contact head is an arc-shaped structure with a light transmittance greater than a preset light transmittance. The surface of the sapphire light-transmitting contact head that contacts the skin is optically polished, and an anti-reflection film is coated inside or on the surface of the sapphire substrate.

4. The method according to claim 1, characterized in that, Electrodes are formed on the surface of the sapphire light-transmitting contact head by means of metal plating or screen printing, including: A metal electrode layer with a preset thickness is formed on the surface of sapphire using a direct copper plating process, or a silver paste electrode is printed on the surface of sapphire using a screen printing process. The electrodes are arranged in a ring or grid pattern.

5. The method according to claim 1, characterized in that, The electrode region is designed to be offset from the light-emitting region of the vertical cavity surface-emitting laser, including: In the planar layout of the sapphire transparent contact head, the electrode area is located in the annular region at the edge of the contact head, and the light-emitting region of the vertical cavity surface-emitting laser is located in the central circular region of the contact head. The electrode area and the light-emitting region do not overlap in the horizontal projection, or... By using laser masking technology to define the electrode deposition area on the sapphire surface, the electrodes are made to avoid the forward light path of the vertical cavity surface-emitting laser.

6. The method according to claim 1, characterized in that, Controlling the power density and emission angle of the vertical-cavity surface-emitting laser (VCSEL) to match the transmittance of the CCSEL with that of the sapphire transparent contact head includes: By adjusting the drive current of the vertical cavity surface-emitting laser (VCSEL), the output power density is maintained within a preset power density range. At the same time, the emission angle of the VCSEL is controlled to be less than a preset angle. Combined with the light transmittance of the sapphire light-transmitting contact head, the thermal effect of the laser in the dermis layer of the skin reaches the preset treatment temperature range.

7. The method according to claim 1, characterized in that, The control of the vertical cavity surface-emitting laser outputting a laser signal and the control of the electrodes conducting EMS microcurrents include: In phototherapy mode, when the vertical-cavity surface-emitting laser (VCSEL) outputs a laser signal, the EMS detection circuit intermittently pulses an EMS microcurrent to the electrode. The pulse frequency of the EMS microcurrent is a non-integer multiple of the modulation frequency of the VCSEL to avoid electromagnetic interference. During the skin detection phase, the EMS detection circuit is prioritized to output EMS microcurrent to the electrode, and during the treatment phase, the vertical cavity surface-emitting laser and the EMS detection circuit are operated simultaneously.

8. The method according to claim 1, characterized in that, Also includes: The electrodes are used to detect the skin's moisture and oil levels, and the impedance parameters of the skin's equivalent circuit are obtained. Based on a preset skin condition and treatment parameter mapping model, the matching vertical cavity surface emission laser power density adjustment value and EMS microcurrent frequency adjustment value are generated and adjusted.

9. The method according to claim 1, characterized in that, Also includes: By collecting multiple sets of skin impedance data corresponding to different skin moisture and oil content, as well as corresponding user feedback on microcurrent comfort and phototherapy thermal sensation; A nonlinear mapping model between skin feature parameters and the power density and EMS frequency of a vertical cavity surface-emitting laser is formed by training a machine learning algorithm, and the nonlinear mapping model is deployed in the memory corresponding to the multifunctional beauty device.

10. A multifunctional beauty device based on a laser and a sapphire light-transmitting contact head, characterized in that, Used to implement the method as described in any one of claims 1 to 9.

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