The efficacy, safety and user experience of the intelligent beauty mask

all come down to its core electronic circuit design. We have carried out all-round independent R&D and optimization across six core circuit modules, creating a clear gap between our product and ordinary mass-market devices:

1. Main Control System: 32-bit Low-Power MCU Closed-Loop Control Architecture for Full-Scenario Intelligent Phototherapy Management

Powered by an ARM Cortex-M0 32-bit low-power MCU as the “intelligent brain” of the device, it coordinates the full-chain functions including phototherapy mode control, drive parameter adjustment, sensor signal acquisition, safety protection actuation, and human-machine interaction.Compared with the simple 8-bit MCU scheme widely used in the market, it achieves three major breakthroughs:

• High-precision closed-loop controlBuilt-in 12-bit high-precision ADC/DAC modules support nanosecond-level signal response and parameter fine-tuning. Real-time millisecond calibration of LED drive current, temperature control signals and light intensity feedback completely solves the pain points of “coarse gear adjustment, unstable output parameters, and uncontrollable phototherapy dosage” in mainstream products.

• Full-scenario programmable solutionBuilt-in 8 preset phototherapy modes support independent single-wavelength control, multi-wavelength combined output, and stepless adjustment of light intensity and duration. Personalized phototherapy plans can be customized via Bluetooth APP, solving the pain point of “fixed modes unable to adapt to different skin types and skincare needs”.

• Ultra-low power optimizationAdopting a graded power management architecture, standby current is as low as 5μA. The main frequency and peripheral power are dynamically adjusted during operation, reducing overall power consumption by 30% compared with similar products, greatly improving battery life and solving the pain point of “only 1–2 uses per charge”.

2. LED Phototherapy Drive System: High-Precision Constant-Current Drive + Zoned Array Design to Eliminate Ineffective Phototherapy

The core of phototherapy efficacy lies in wavelength accuracy, optical power stability and illumination uniformity — all determined by drive circuits and optical layout, where most products falsely label specifications.Our solution adopts a disruptive bottom-level circuit design:

• Boost constant-current drive circuitUsing the medical-grade FP7208 boost constant-current driver chip with a built-in 300KHz fixed-frequency PWM controller, it stably boosts 3.7V lithium battery voltage to 12V for the full-face LED array.Compared with cheap resistor current-limiting schemes, it achieves ±1% output current accuracy, eliminating light intensity decay and wavelength shift caused by voltage drop. Phototherapy parameters remain stable within clinically effective thresholds from start to finish, solving “false power labeling, fading intensity, and unreliable efficacy”.

• PWM-to-analog flicker-free dimmingBuilt-in PWM-to-analog dimming supports up to 1% dimming depth with zero flicker and no spectral shift.Unlike conventional PWM dimming, it completely avoids eye irritation and dizziness, while stabilizing LED wavelengths at rated values, meeting medical phototherapy accuracy standards and solving “light leakage, inaccurate wavelengths, and excessive ineffective light”.

• 6-zone independent drive designThe full-face LED array is divided into 6 independently driven zones: forehead, periorbital area, cheeks, nasal ala, jawline and neck. Each zone has an independent constant-current drive branch and MOS switch control, enabling zone-specific intensity and mode customization.Combined with curved surface light source matrix layout, it provides 100% full-face and neck coverage without dead zones, solving “missed areas around the nose and eyes and uneven illumination”.

• High-reliability lamp bead protectionEach LED is equipped with an independent current-limiting resistor; single-bead failure does not affect the whole array.The PCB uses a flexible FPC board that perfectly fits the mask’s curved structure, ensuring vertical light output to the skin and improving optical power efficiency by 40%, solving “easy lamp burnout, inaccurate light angle, and low efficacy”.

3. Power Management System: Highly Integrated Charge/Discharge Control + Wireless Endurance for Safety & Portability

Targeting “wire restriction, poor battery life and unsafe charging” in mainstream products, we use a highly integrated power management system for dual safety and portability:

• Lithium battery charge/discharge protection circuitBuilt-in dedicated lithium battery protection chip provides four hardware-level protections: overcharge, over-discharge, overcurrent and short-circuit.Supports Type-C 5V/2A fast charging; a full charge in 3 hours supports more than 10 standard 10-minute phototherapy sessions — 3× longer battery life than comparable products.

• Graded voltage-stabilized isolated power supplyDual-power scheme: DC-DC boost supplies stable 12V high current for LED drivers; LDO provides clean 3.3V for MCU, sensors and Bluetooth.Isolates digital and analog circuits, eliminating power noise interference and greatly improving stability and anti-interference performance.

• Unrestrained wireless designSupports magnetic wireless charging and a fully sealed, hole-free body. Combined with low-power optimization, it completely removes external handles and cables. Users can walk, work or watch videos while wearing it, solving “inconvenient wired use and forced lying down”.

4. Intelligent Sensing & Safety Protection Circuit: Multi-Layer Hardware-Level Protection for Medical-Grade Safety

Against safety complaints such as “overheating, low-temperature burns, redness, and eye damage”, we designed a full-chain sensing and protection system with active + passive dual protection:

• High-precision closed-loop temperature control6-channel high-precision NTC thermistors distributed across key facial areas. Real-time temperature acquisition via 12-bit ADC and PID algorithm achieves ±0.5℃ control accuracy.Drive current automatically reduces above 42℃; hardware-level power-off activates above 45℃. Operating temperature is maintained at a comfortable 38–40℃, eliminating burns and irritation.

• 8-fold optoelectronic safety protectionHardware: overvoltage, overcurrent, LED open/short-circuit protection; reverse connection and ESD protection (±8kV static resistance).Software: timeout protection and skin-contact detection — high-brightness modes cannot activate without proper wearing, preventing accidental eye injury.

• Light intensity closed-loop feedbackBuilt-in light intensity sensor collects real-time output power. The MCU automatically calibrates drive current if intensity deviates, avoiding excessive dosage that causes hyperpigmentation or barrier damage, solving “post-use dark spots, redness and skin irritation”.

5. EMC/EMI & Reliability Design for Extended Service Life

Against quality issues such as “early failure, electrical interference and poor water resistance”, we optimize from PCB design to manufacturing:

• Electromagnetic compatibility optimizationSeparate digital and analog grounding; partitioned layout of high-current drive and low-voltage control circuits.π-filter and magnetic bead isolation effectively suppress EMI. Complies with YY 0505 medical EMC standard, no interference with mobile phones, Bluetooth headsets or external electromagnetic environments.

• Waterproof and durable designCore PCBA coated with nano-hydrophobic layer; IPX5 waterproof sealed structure allows direct rinsing, solving “difficult cleaning and circuit short-circuit from skincare products”.Flexing-resistant, anti-oxidation FPC withstands over 10,000 bends, with service life far exceeding industry averages.

Medical-Grade Precise Phototherapy — No False Labeling, No Unnecessary Costs, Visible Results Every Use

1. Self-developed high-precision constant-current drive circuitWavelength accuracy ±2nm, stable optical power density.4 medical-grade wavelengths target various skin concerns; full-process controllable dosage meets clinical standards.Achieve salon-level photon rejuvenation at home: acne clearing, brightening, anti-aging and repair, suitable for all skin types.

2. Full-face phototherapy with no dead zones, zone-customized skincare6-zone independent drive + 108 high-density medical-grade LEDs in curved matrix layout.100% full-face & neck coverage; independent intensity and mode adjustment for acne-prone, sensitive or wrinkled areas.Even illumination on nasal ala, periorbital area and details, doubling skincare efficiency.

3. Constant temperature, no burning, multi-safety protection — safe for sensitive skin6-channel NTC high-precision closed-loop temperature control with PID algorithm.Flicker-free dimming + dedicated eye shading design.8-fold hardware + software safety protection and light intensity closed-loop calibration.Comfortable, non-irritating, safe for sensitive and acne-prone skin, eliminating safety concerns.

4. Lightweight wireless design — no pressure, no restrictionLow-power circuit + high-capacity battery: over 10 uses per full charge.Total weight ≤180g, flexible FPC, no external handle, zero burden when wearing.No pressure on nose bridge or face, no marks. Wireless for use while working, watching TV or doing housework.

5. Durable and easy to cleanIPX5 waterproof, nano-coated PCBA — washable directly.Independent lamp bead protection: single failure does not affect the whole device.10,000-time flexing-resistant FPC, anti-static, anti-interference.Long-lasting performance, high cost-performance, no frequent replacement needed.

Core Product Specifications