Portable Eye Tracker with Multi-Sensor Calibration

The patent divides the imaging function into multiple independent image sensors, each specialized for specific lighting conditions or eye regions. This segmentation allows the system to maintain high accuracy across diverse conditions while keeping each individual sensor simple and the overall system manageable.

The patent implements a multi-functional imaging system where different image sensors serve different purposes: some capture reflectance for gaze direction, others capture emissive features for eye state detection. This multi-functionality enables the system to operate accurately in various lighting conditions without requiring separate dedicated systems for each function.

The patent employs dynamic calibration and tracking mechanisms that continuously adapt to changes in the device's position relative to the wearer's head. The system dynamically adjusts calibration parameters and tracking algorithms in response to detected movements, maintaining accurate gaze detection despite slipping or manual adjustment.

The patent implements feedback mechanisms where the system monitors the quality of eye tracking data and automatically adjusts calibration and tracking parameters. When movement or degradation is detected, the system requests re-calibration or adjusts existing calibration parameters to maintain optimal performance, creating a closed-loop system that compensates for physical movement.

The patent performs preliminary calibration actions during initial setup to establish a baseline for each user, but also implements continuous or periodic recalibration actions that occur automatically during use. This preliminary plus continuous approach ensures that calibration remains valid even when the device moves relative to the wearer's head.

The patent employs feedback mechanisms that monitor tracking quality and automatically trigger recalibration when degradation is detected. The system continuously assesses the validity of existing calibration and requests re-calibration when movement or performance degradation occurs, maintaining accurate personalized tracking without requiring manual intervention.

The patent segments the imaging system into multiple specialized sensors, each optimized for specific functions such as reflectance imaging, emissive feature detection, or specific lighting conditions. This segmentation allows high accuracy through functional specialization while keeping each individual component relatively simple and the overall system architecture manageable.

The patent implements multi-functional sensors that can operate in different modes or combine multiple sensing capabilities within a single device. This reduces the total number of separate components needed while maintaining the functional diversity required for accurate gaze detection across various conditions, thereby reducing overall system complexity.