Eye Movement Detection Using Infrared Tracking Through LCD Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current eye movement detection devices cannot effectively track eye movements when the vision of one eye is blocked, as traditional methods rely on visible light and cannot function when one eye's vision is obstructed.
Innovation Solution
A vision device incorporating an LCD panel for selectively blocking or allowing vision in one eye, combined with a camera capable of tracking eye movements in wavelengths outside the visible spectrum, such as infrared, allowing continuous monitoring even when one eye's vision is blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an LCD panel blocks the vision of one eye to enable selective visual stimulation, then the ability to present monocular stimuli is improved, but the ability to detect eye movements of that eye is lost
Solution Approach 1:
The system separates the visible spectrum function (LCD panel blocking) from the infrared spectrum function (camera tracking). The LCD panel segments the light spectrum by blocking visible light while the infrared camera operates in a different spectral band that passes through the panel, allowing independent optimization of each function.
Solution Approach 2:
The infrared camera acts as an intermediary detection mechanism that can penetrate the LCD panel's visible light blocking. Instead of trying to detect eye movements through visible light (which is blocked), the system uses infrared wavelengths as an intermediate medium that can pass through the panel and still capture eye movement information.
2Adaptability or versatility
If an opaque screen blocks the vision of one eye, then selective visual stimulation is achieved, but eye movement tracking becomes impossible
Solution Approach 1:
The system changes the operational parameter from visible light detection to infrared detection. By operating in the infrared spectrum rather than visible light, the camera can penetrate the opaque LCD panel and continue tracking eye movements without interruption, maintaining ease of operation throughout the experiment.
3Device complexity
If traditional visible light-based eye tracking is used, then eye movement detection is simple, but tracking cannot occur when vision is blocked
Solution Approach 1:
The system transitions from a two-dimensional problem (visible light blocking) to a three-dimensional solution by adding the spectral dimension. By operating in the infrared dimension rather than visible light, the camera can detect eye movements through the blocked path, maintaining reliability without significantly increasing overall system complexity.
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
Enables the detection of eye movements under the effect of visual stimuli, facilitating the identification and rehabilitation of ocular and neurological disorders, as well as virtual reality applications, by allowing continuous recording of eye movements regardless of vision blockage.
Implementation Method 1
at least one camera for tracking the eye movement in the wavelengths outside the visible spectrum through the panel
Implementation Method 2
the device also comprises emitters for illuminating the panel in the infrared wavelengths
Data Source
AI summary
The disclosure relates to a vision device for detecting eye movement, which comprises a screen for displaying stimuli, an LCD panel for selectively blocking the viewing by either eye of the stimuli displayed on the screen, the panel being capable of adopting a number of configurations, including a configuration blocking the vision of either eye and a configuration allowing the vision of either eye, and at least one camera for tracking eye movement in wavelengths outside the visible spectrum through the panel. The camera being capable of tracking the movement of the eyes under the effect of the stimuli in the configurations of the panel that allow vision and block vision.