Gaze Tracking via Converging Reflected Light Rays
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Solution Overview
Problem
Current gaze tracking technologies in AR and VR devices face challenges with high power consumption and latency, limiting their ability to provide low-latency, high-sampling-rate gaze tracking for immersive experiences and efficient data transfer.
Innovation Solution
A method that uses reflected light rays converging towards a rotational center of the eye to generate pattern data, processed by an optical sensor and processor to estimate gaze direction, reducing complexity and power consumption through simplified signal encoding and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional gaze tracking technologies are used in AR and VR devices, then gaze tracking functionality is provided, but power consumption is high and latency is increased
Solution Approach 1:
The patent extracts and utilizes only the necessary reflected light rays that converge toward the rotational center of the eye, discarding unnecessary light paths and processing steps. This selective extraction reduces computational complexity and power consumption while maintaining gaze tracking accuracy through simplified pattern data generation from the optical sensor.
Solution Approach 2:
The patent changes the optical parameter arrangement by positioning the optical sensor at a specific location where reflected light rays naturally converge, and by focusing measurement on the rotational center of the eye rather than traditional pupil center methods. This parameter optimization enables accurate gaze tracking with reduced computational requirements and lower power consumption.
2Speed
If conventional gaze tracking technologies are used in AR and VR devices, then gaze tracking functionality is provided, but latency is increased
Solution Approach 1:
The patent extracts only the essential pattern data from reflected light ray intersections at the optical sensor, eliminating unnecessary intermediate processing steps found in conventional systems. This extraction approach reduces computational load and processing time, thereby decreasing latency while maintaining high-speed gaze tracking capability.
Solution Approach 2:
The patent replaces complex mechanical and computational processing systems with a simplified optical arrangement where the optical sensor directly captures pattern data from converging reflected light rays. This substitution of the mechanical processing chain with a more direct optical-measurement approach reduces system latency and increases gaze tracking speed.
3Productivity
If reflected light rays converging towards rotational center are used, then latency and power consumption are reduced, but system complexity must be managed
Solution Approach 1:
The patent makes the optical sensor serve multiple functions: it detects reflected light rays, generates pattern data, and enables gaze direction computation all through a single component arrangement. This multi-functionality reduces the need for additional separate components and processing systems, thereby managing device complexity while maintaining high productivity in gaze tracking.
Solution Approach 2:
The optical system is arranged so that reflected light rays naturally converge toward the rotational center of the eye and form pattern data directly at the optical sensor location. This self-organizing optical arrangement eliminates the need for complex active control mechanisms or additional processing components, allowing the system to manage its own complexity through natural optical properties while achieving high gaze tracking efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces latency and power consumption, enabling fast and accurate gaze tracking, which enhances immersive experiences and reduces data transfer rates for high-quality image rendering in AR and VR devices.
Implementation Method 1
receiving reflected light rays at an optical sensor
Data Source
AI summary
A method, computer readable medium, and system are disclosed for gaze tracking. The method includes the steps of receiving reflected light rays at an optical sensor, where all of the reflected light rays converge towards a rotational center of an eye and generating pattern data based on intersections of the reflected light rays at a surface of the optical sensor. A processor computes an estimated gaze direction of the eye based on the pattern data.