Skincare Device Optical Encoder Kinematic Sensing

The patent replaces mechanical force sensing with optical encoding systems. Optical encoders use light sources and photodetectors to detect brushhead position and movement, substituting traditional mechanical force sensors. This allows precise measurement of kinematic parameters (position, velocity, acceleration) without complex mechanical force detection mechanisms, resolving the contradiction between measurement precision and device complexity.

The patent introduces fiducial markers as intermediary elements. These markers are placed on the brushhead and detected by optical sensors, serving as mediators between the physical brushhead movement and the digital measurement system. This intermediary approach enables accurate kinematic measurement while keeping the actual sensor implementation relatively simple, addressing both measurement precision and device complexity concerns.

The patent implements dynamic treatment customization by continuously collecting real-time kinematic data (position, velocity, acceleration) during device operation. The system adjusts treatment parameters dynamically based on detected skin conditions and movement patterns, rather than using fixed pre-programmed routines. This dynamic adaptation enables personalized treatment while using a unified sensor platform, balancing adaptability with manageable device complexity.

The patent employs multi-functional optical encoders that simultaneously perform multiple tasks: detecting brushhead position, measuring movement velocity, tracking acceleration patterns, and identifying fiducial markers for skin condition analysis. This multi-functionality allows comprehensive treatment customization without proportionally increasing device complexity, as a single sensor system accomplishes what would otherwise require multiple specialized sensors.