Gaze-Based Filtered Image Projection for Retinal Devices
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Solution Overview
Problem
Current solutions for projecting images onto the eyes of individuals with retinal degeneration, such as retinitis pigmentosa or macular degeneration, do not provide optimal comfort and perception, as they either fail to accurately filter images based on gaze direction or do not account for the specific illumination needs of the eye.
Innovation Solution
A computer-implemented method that determines a filter based on the gaze direction of the wearer, allowing for accurate projection of images only on the illuminated parts of the eye, thereby enhancing comfort and perception by using a device with an optical module that adjusts radiant power according to pupil size and position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image projection is performed without gaze-based filtering, then the entire image is projected onto the eye, but this causes discomfort and reduces perception accuracy due to mismatch with the wearer's actual gaze direction
Solution Approach 1:
The patent applies local quality by filtering the projected image based on gaze direction, so that only the relevant portion of the image corresponding to the wearer's actual gaze is projected onto the illuminated part of the eye. This ensures that the image projection is locally optimized for both accuracy and comfort, rather than projecting the entire image uniformly.
Solution Approach 2:
The patent implements dynamics by continuously tracking the wearer's gaze direction and dynamically adjusting the image filter in real-time. The filter is updated based on current gaze measurements, allowing the system to adapt to changing gaze directions and maintain optimal image projection accuracy and comfort throughout use.
2Manufacturing precision
If the light source projects image with fixed radiant power, then the device structure is simple, but the illumination does not adapt to pupil size and position variations, reducing image projection quality
Solution Approach 1:
The patent applies dynamics by making the radiant power of the light source variable rather than fixed. The control module adjusts the radiant power in real-time based on measured pupil size and position, allowing the system to optimize image projection quality for different pupil conditions while maintaining a relatively simple device structure through software-based control.
Solution Approach 2:
The patent implements parameter changes by varying the radiant power parameter of the light source according to pupil characteristics. The control module modifies the light intensity parameter dynamically to match the illuminated part of the eye, thereby improving image projection quality without requiring complex hardware modifications.
3Measurement precision
If real-time gaze tracking and image filtering are implemented, then image projection accuracy is improved, but computational time and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-defining filter configurations that can be quickly applied based on measured gaze direction. Rather than performing complex real-time filtering calculations, the system prepares filter templates in advance and selects/apples the appropriate filter based on current gaze measurements, significantly reducing computational processing time while maintaining filtering accuracy.
4Illumination intensity
If the light source illuminates the entire eye, then maximum light availability is provided, but this causes discomfort and potential damage to non-target areas of the eye
Solution Approach 1:
The patent applies local quality by directing light illumination specifically to the illuminated part of the eye that corresponds to the wearer's gaze direction. The control module adjusts the light distribution to concentrate illumination where needed while minimizing or eliminating illumination of non-target areas, thereby providing sufficient light availability for vision restoration while avoiding discomfort and potential damage to healthy retinal tissue.
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
This method provides improved comfort and perception by ensuring accurate image projection aligned with the wearer's gaze direction and optimal illumination, allowing for real-time image updating and reduced computational time, thus enabling better visual exploration.
Implementation Method 1
a device with an optical module that adjusts radiant power according to pupil size and position
Data Source
AI summary
A computer implemented method for controlling a device adapted for projecting an image on at least a part of an eye of a wearer of said device, the method comprising the steps of providing the direction gaze of an eye of the wearer, providing an initial image to be projected, determining at least a filter depending from the provided gaze direction, filtering the initial image using the determined filter, and sending a command to the device for projecting the filtered image in the eye.