Eyeball Tracking Delay Detection via Coordinate Difference

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Solution Overview

Problem

In virtual display systems, eyeball tracking technologies face delays that affect user experience due to high rendering burdens, necessitating a method to measure and optimize the delay in eyeball tracking apparatuses.

Innovation Solution

A method and apparatus for detecting the delay in eyeball tracking apparatuses by determining the coordinate difference between actual and detected gaze points, using a mapping relationship between gaze point coordinates and time, and calculating the delay amount based on this difference and the rotation angular speed of the mechanical eye.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high resolution image rendering is performed for the gaze area based on eyeball tracking technology, then rendering efficiency is improved, but tracking delay increases due to the complex processing required

Engineering Contradiction:
Improverendering efficiencyVSAvoidtracking delay
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing the mapping relationship between gaze point coordinates and time in a lookup table. When delay detection is needed, the system directly queries this pre-established mapping relationship rather than performing real-time calculations, thereby reducing processing time and delay while maintaining rendering efficiency

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating a virtual mechanical eye model that replicates the optical characteristics and movement patterns of a real human eye. This virtual model allows the system to simulate and detect delay without requiring actual human subject testing, enabling efficient delay measurement while preserving the accuracy needed for high-resolution gaze-based rendering

Inventive Principle:
Principle #26Copying

2Measurement precision

If the mechanical eye rotates according to preset mapping relationship between gaze point coordinates and time, then delay detection accuracy is improved, but the complexity of the detection system increases

Engineering Contradiction:
Improvedelay detection accuracyVSAvoiddetection system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical measurement systems with a computational approach. Instead of using sophisticated hardware to directly measure delay, the system uses a virtual mechanical eye model and software-based coordinate mapping to simulate and calculate delay, thereby reducing physical device complexity while maintaining measurement precision

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary element - the virtual mechanical eye model - that mediates between the actual eyeball tracking system and the delay measurement process. This intermediary allows indirect measurement of delay through coordinate difference calculation, simplifying the overall detection system while preserving accuracy

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS12182324B2Method and apparatus for detecting delay amount of eyeball tracking apparatus, eyeball tracking system, and non-transitory computer-readable storage medium
Publication Date: 2024.12.31 BEIJING BOE OPTOELECTRONCIS TECH CO LTD
  • US12182324B2 patent drawing
  • US12182324B2 patent drawing
  • US12182324B2 patent drawing

AI summary

Provided are a method and an apparatus for detecting a delay amount of an eyeball tracking apparatus, an eyeball tracking system, and a non-transitory computer-readable storage medium. The method includes: receiving a detected gaze point coordinate of a mechanical eye at the at least one detection time point; determining an actual gaze point coordinate of the mechanical eye at the at least one detection time point; and determining the delay amount of the eyeball tracking apparatus according to a coordinate difference between the actual gaze point coordinate and the detected gaze point coordinate at the at least one detection time point.