Eye Tracking Module for Video Glasses with Infrared Sensors
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Solution Overview
Problem
Current eye tracking devices for video glasses have complex structures, large occupied spaces, and limited precision, making them inefficient for effective eye tracking.
Innovation Solution
An eye tracking module for video glasses featuring infrared light sources, an image sensor assembly, an infrared light filter component, and a tracking module housing, with infrared light sources and image sensors positioned laterally to collect eye reflections without obstructing the visual field, and adjustable components for flexible assembly and vision correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional eye tracking devices are used in video glasses, then eye tracking function is achieved, but device complexity increases and occupied space increases
Solution Approach 1:
The patent combines the infrared light source and image sensor assembly into a single integrated tracking module housing, reducing device complexity while maintaining eye tracking precision. The fixed arrangement of components within the housing eliminates the need for separate adjustment mechanisms, simplifying the overall structure.
Solution Approach 2:
The tracking module is designed to be universally applicable to video glasses, with a connector that can be fixed to the video glasses housing. The module serves multiple functions: emitting infrared light, collecting reflected light, and processing eye tracking data, all within a single integrated unit.
2Measurement precision
If traditional eye tracking devices are used in video glasses, then eye tracking function is achieved, but occupied space increases
Solution Approach 1:
The image sensor assembly is positioned within the tracking module housing, with the infrared light filter component disposed on the transmission light path between the image sensor assembly and the eye. This nested arrangement minimizes the occupied space while maintaining all necessary functional components for precise eye tracking.
Solution Approach 2:
The infrared light sources are arranged in a lateral frontal region of the eye at positions outside the visual angle of the video glasses, utilizing three-dimensional spatial arrangement to reduce interference with the user's visual field while maintaining effective eye tracking precision.
3Measurement precision
If infrared light sources are positioned to emit light to the eye, then eye tracking is enabled, but interference with display screen view may occur
Solution Approach 1:
The infrared light sources are positioned in the lateral frontal region of the eye at specific locations outside the visual angle of the video glasses. This localized positioning ensures that infrared light is emitted only in the necessary direction for eye tracking without interfering with the user's view of the display screen.
Solution Approach 2:
The infrared light filter component acts as an intermediary element, disposed on the transmission light path between the image sensor assembly and the eye. This filter allows the image sensor to selectively detect infrared light reflected from the eye while blocking other wavelengths, ensuring accurate eye tracking without affecting the user's visual experience.
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
The solution results in a simple, compact, high-precision eye tracking system that allows for flexible assembly and improved image quality, enabling effective eye tracking without affecting the user's view of the display screen.
Implementation Method 1
configured to emit infrared light to an eye; and the eye reflects the infrared light
Implementation Method 2
the eye reflects the infrared light so as to form an eye reflection light path
Implementation Method 3
the image sensor assembly is disposed on the eye reflection light path and is configured to directly collect an eye image
Implementation Method 4
The infrared light filter component is disposed on a transmission light path between the image sensor assembly and the eye
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An eye tracking module for video glasses includes: at least two infrared light sources (1), at least one image sensor assembly (2), an infrared light filter component (11) and a tracking module housing (6); fixing members are provided on the tracking module housing (6), and include an infrared light source fixing member (6-1), an image sensor assembly fixing member (6-2) and a connector (6-4); the infrared light source fixing member (6-1) and the image sensor assembly fixing member (6-2) are in detachably fixed connection or non-detachably fixed connection with the tracking module housing (6); and the connector (6-4) is in detachably fixed connection with the tracking module housing (6). The eye tracking module has the advantages of simple structure, small occupied space, high eye tracking precision, and flexibility and convenience in use.