XR Display Eye-Tracking Control for Vergence-Accommodation Conflict

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Solution Overview

Problem

Conventional XR systems cause discomfort and fatigue due to vergence-accommodation conflict, which occurs when vergence and accommodation signals send conflicting depth signals to the brain, and they fail to optimally display 3D images comfortably for users.

Innovation Solution

XR systems modify virtual content by determining a render position error and adjusting the range of operation based on this error, potentially deleting or displaying content outside the focal plane to minimize vergence-accommodation conflict, and adjust virtual content according to the user's eye characteristics and system errors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional XR systems display virtual content at various depths without modification, then the system can present immersive 3D scenarios, but users experience vergence-accommodation conflict causing discomfort and fatigue

Engineering Contradiction:

Improve3D viewing comfortVSAvoidvergence-accommodation conflict

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts rendering parameters (such as focal depth, vergence angle, and accommodation distance) based on detected eye characteristics and head pose, modifying the virtual content to align with the user's natural vergence-accommodation relationship and eliminate visual discomfort

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system uses eye tracking data and head pose detection as feedback to continuously adjust the rendering parameters of virtual content, creating a closed-loop control system that adapts to real-time changes in user eye position and orientation to maintain visual comfort

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the system modifies virtual content based on eye characteristics and render position error, then viewing comfort is improved, but graphical processing requirements increase

Engineering Contradiction:

Improveviewing comfortVSAvoidgraphical processing capabilities

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system applies rendering modifications selectively based on the magnitude of render position error and specific eye characteristics, adjusting only the necessary portions of virtual content rather than processing all content at maximum detail, thereby reducing overall graphical processing requirements while maintaining comfort where needed

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12526395B2Methods for controlling performance of extended reality display systems

Publication Date: 2026.01.13 MAGIC LEAP INC

AI summary

Systems, methods, and computer program products for displaying virtual contents using a wearable electronic device determine the location of the sighting centers of both eyes of a user wearing the wearable electronic device and estimate an error or precision for these sighting center. A range of operation may be determined for a focal distance or a focal plane at the focal distance based at least in part upon the error or the precision and a criterion pertaining to vergence and accommodation of binocular vision of the virtual contents with the wearable electronic device. A virtual content may be adjusted into an adjusted virtual content for presentation with respect to the focal plane or the focal distance based at least in part upon the range of operation. The adjusted virtual content may be presented to the user with respect to the focal distance or the focal plane.