See-Through Display Color Correction Using Eye Tracking
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Solution Overview
Problem
Portable eyewear devices, such as smartglasses, suffer from color and brightness non-uniformities across the display field and eyebox due to variations in eye position and gaze direction, which degrade user experience and are not adequately addressed by simple calibrations.
Innovation Solution
An eyewear device equipped with an infrared emitter and camera system that tracks eye gaze direction and position, using color and intensity calibration maps to dynamically adjust display color and brightness, ensuring uniform perception across varying eye positions and gaze directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical combiner technologies (waveguides, reflectors) are used in AR devices, then augmented reality display functionality is achieved, but color and brightness non-uniformities are introduced that vary with field point and eye position
Solution Approach 1:
The patent implements dynamic color correction by capturing eye position data in real-time and adjusting display parameters accordingly. The system transitions from static display output to dynamic adaptation based on user eye position, thereby maintaining color uniformity across varying field points and eye positions while preserving AR display functionality
Solution Approach 2:
The patent applies different color correction parameters to different regions of the display corresponding to different eye positions. By segmenting the display into multiple zones and applying localized color adjustments based on detected eye position, the system achieves uniform color perception across the entire display field without compromising the overall AR display capability
2Ease of manufacture
If simple color calibration is applied, then manufacturing complexity is reduced, but color non-uniformities across different eye positions and field points are not adequately addressed
Solution Approach 1:
The patent implements a feedback loop where eye position is continuously monitored and used to dynamically adjust display color parameters. This closed-loop system automatically compensates for color non-uniformities without requiring complex manual calibration procedures, thereby maintaining ease of manufacture while achieving superior color uniformity across varying eye positions and field points
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
The system provides a dynamically adjusted, uniformly colored and brightened display experience by applying color masks based on real-time eye tracking, enhancing user experience and consistency.
Implementation Method 1
an infrared emitter to emit a pattern of infrared light and an infrared camera to detect a reflection variations in the emitted pattern of infrared light
Implementation Method 2
an infrared camera to detect a reflection variations in the emitted pattern of infrared light
Data Source
AI summary
An eyewear device that accurately and dynamically adjusts color and brightness of a see-through display as a function of a user's eye gaze direction and eye position using a display characteristic map. The display characteristic map is indicative of display characteristics of the see-through display. Color masks are generated as a function of the display characteristic map and the user's eye gaze direction and eye position, and a processor adjusts the see-through display characteristics based on the color masks.