Eye Tracking Accuracy in Rotated Dual-Screen Hinge Configurations
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Solution Overview
Problem
Eye tracking systems in information handling systems struggle to generate accurate eye tracking data when the user's gaze is directed away from the gaze interaction plane, particularly in dual-screen configurations where the second display screen is rotated at angles other than 180°.
Innovation Solution
The method involves using the hinge angle data to transform the gaze interaction plane into a projected gaze interaction plane, allowing the processing device to project eye tracking data onto this new plane, ensuring accurate gaze location determination on rotated display screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the eye tracking system is fixed to the first display screen, then the eye tracking data is accurate when the user gazes at the first display screen, but the eye tracking data becomes inaccurate when the user gazes at the second display screen that is rotated at an angle
Solution Approach 1:
The patent transforms the 2D eye tracking data from the gaze interaction plane into 3D spatial coordinates, then projects these coordinates onto the actual plane of the second display screen using hinge angle information. This dimensional transformation enables accurate gaze tracking across multiple display orientations by accounting for the rotational relationship between displays.
Solution Approach 2:
The system dynamically changes the coordinate system parameters based on the hinge angle between display screens. By receiving hinge angle data and using it to transform the gaze interaction plane into a projected gaze interaction plane, the system adapts the eye tracking parameters to match the actual spatial orientation of each display screen.
2Measurement precision
If multiple eye tracking systems are used for multiple display screens, then accurate gaze tracking on each screen is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent makes a single eye tracking system universal by enabling it to track gaze across multiple display screens with different orientations. Through coordinate transformation using hinge angle data, one eye tracking system performs the function of multiple systems, reducing device complexity and cost while maintaining tracking accuracy.
Solution Approach 2:
The patent introduces hinge angle data as an intermediary parameter that connects the fixed eye tracking system to the rotatable second display screen. This intermediary information enables the system to calculate the appropriate coordinate transformations, allowing accurate gaze tracking without requiring additional eye tracking hardware.
3Adaptability or versatility
If the second display screen is rotated to improve user interface flexibility, then adaptability is enhanced, but the accuracy of eye tracking data generated by the fixed eye tracking system deteriorates
Solution Approach 1:
The system dynamically adjusts the gaze interaction plane based on the current hinge angle between display screens. As the second display screen rotates to different positions, the system receives updated hinge angle data and相应地 transforms the eye tracking coordinates, maintaining accuracy throughout the range of motion while preserving interface flexibility.
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 enhances the accuracy of eye tracking data by adjusting for hinge angles, enabling precise gaze location assessment regardless of the display screen orientation, thus improving user interaction with multiple displays.
Implementation Method 1
an eye tracking system may include at least one light source positioned to illuminate the user's eyes, at least one photosensor (or camera) positioned to detect light reflected off the user's eyes
Data Source
AI summary
The present disclosure provides embodiments of systems and methods that may be used by an information handling system (IHS) to improve the accuracy of eye tracking data generated by an eye tracking system of the IHS when a user's gaze is not directed to a gaze interaction plane of the eye tracking system. In one embodiment, the method may include receiving first data corresponding to a hinge angle (θ) measured between a first surface and a second surface of the IHS, receiving second data corresponding to a user's gaze on the first surface or the second surface, and using the first data and the second data to provide accurate eye tracking data when the user's gaze is directed to the second surface. When the user's gaze is directed to the first surface, the method may use the second data, but not the first data, to provide accurate eye tracking data.