Eye Movement Electrode Layout for Left-Right Gaze Differentiation
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Solution Overview
Problem
Conventional eye movement detecting devices cannot distinguish between the movements of the right and left eyes, failing to differentiate whether they move in the same or opposite directions.
Innovation Solution
An eye movement detecting device with electrodes placed to sandwich each eye from different directions, utilizing a neutral electrode to detect eye potentials, allowing for the detection of horizontal and vertical movements, convergence, and divergence of both eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional eye movement detecting devices use simple electrode placement, then the device complexity is reduced, but the measurement precision of individual eye movement detection deteriorates
Solution Approach 1:
The patent divides the eye movement detection into separate channels for right and left eyes by placing distinct electrode pairs (first and second electrode pairs) that can independently detect potentials from each eye. This segmentation enables individual eye movement detection while maintaining manageable system complexity through modular electrode configuration.
Solution Approach 2:
The patent applies different electrode placement configurations for different detection purposes: the first electrode pair is positioned to detect right eye potentials, the second electrode pair for left eye potentials, and the third electrode pair for horizontal movement. This localized optimization of electrode placement achieves precise individual eye detection without requiring complex overall system redesign.
2Loss of information
If conventional devices use limited electrode configuration, then the device complexity is low, but the loss of information about eye movement direction and type increases
Solution Approach 1:
The patent designs the electrode configuration to serve multiple detection functions simultaneously: the first and second electrode pairs detect vertical eye movements, the third electrode pair detects horizontal movements, and the fourth electrode pair detects convergence. This multi-functional design captures comprehensive eye movement information without proportionally increasing device complexity.
Solution Approach 2:
The patent adds detection dimensions by introducing the fourth electrode pair that specifically detects convergence (eyes moving in opposite directions), complementing the vertical and horizontal detection channels. This dimensional expansion enables complete characterization of eye movement types and directions.
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
Accurately detects individual eye movements, enabling differentiation between same-direction and opposite-direction movements, and provides insights into user conditions such as concentration and stress levels.
Implementation Method 1
there is electrooculography (EOG). In this technique, potentials of right eye and left eye (hereinafter referred as eye potentials) can be detected by attaching electrodes to the skin close to each of the right eye and the left eye
Data Source
AI summary
According to one embodiment, an eye movement detecting device comprises first, second, third, fourth and fifth electrodes. A line connecting the first and the third electrodes passes through the right eye and a line connecting the second and the fourth electrodes passes through the left eye on at least one of a front view, a plan view or a side view. A distance between the fifth and the first electrodes is equal to a distance between the fifth and the second electrodes. A distance between the fifth and the third electrodes is equal to a distance between the fifth and the fourth electrodes. The detector respectively detects a horizontal movement of the right eye and a horizontal movement of the left eye.