Retinal Projection Device with Eye Gaze Detection
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Solution Overview
Problem
Conventional retinal projection devices for sports activities face issues with high power consumption, obstructed field of view, distracting displays, and inability to adapt to varying ambient light conditions, leading to user discomfort and reduced battery life.
Innovation Solution
A retinal projection device with an eye gaze detection module that activates the display only when the user's gaze is in a predetermined position, using a micro-projection system with adjustable brightness and a remote control for selecting information, and an ambient light sensor to optimize luminance, allowing hands-free operation and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the display is always active during usage, then the user can continuously access information, but power consumption increases and user comfort decreases
Solution Approach 1:
The display operates periodically rather than continuously, activating only when the user looks at the device (detected via eye tracking) or when sport data thresholds are exceeded. This on-demand activation maintains information accessibility while dramatically reducing power consumption compared to continuous display operation.
2Loss of information
If a large image is displayed to replace field of view, then information visibility improves, but the user loses the real scene view
Solution Approach 1:
Instead of projecting a large image that replaces the entire field of view, the system projects a compact display localized at a specific retinal location. This allows information to be visible without obstructing the broader real scene view, as the projection occupies only a localized portion of the visual field.
3Loss of information
If the display projects image in all ambient conditions, then information is always visible, but user comfort decreases in bright conditions
Solution Approach 1:
The display system dynamically adjusts its operation based on ambient light conditions detected by sensors. In bright conditions, the display reduces intensity or activates only on demand, while in dim conditions it provides continuous support. This dynamic adaptation maintains information visibility while optimizing user comfort across varying environmental conditions.
4Productivity
If fast moving mirrors are used to display large image, then image transmission speed improves, but device volume and power consumption increase
Solution Approach 1:
Instead of using complex fast-moving mirror systems to project large images, the system uses a compact retinal projection approach that directly renders information at the retinal plane. This copying method achieves efficient information transmission without requiring bulky mechanical components, thereby reducing device volume while maintaining productivity.
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 provides a non-distracting, power-efficient retinal display that adapts to ambient light, extending battery life and enhancing user comfort and safety by activating only when needed, with a focus on minimal power consumption and unobstructed field of view.
Implementation Method 1
an eye gaze detection module arranged to take an eye image of a user's eyes and to activate the projection component if a pupil of the user is in a predetermined position in said eye image
Implementation Method 2
They usually comprise a light source and a MEMS-based mirror arranged for orienting the laser beam directly onto a selected portion of the retina of the user wearing the device
Implementation Method 3
They usually comprise a light source and a MEMS-based mirror arranged for orienting the laser beam directly onto a selected portion of the retina of the user wearing the device. By scanning the laser beam and controlling its intensity, the device projects an image
Implementation Method 4
In addition there is a need to adapt automatically and dynamically the luminance of the projected image as a function of the ambient light conditions which can vary greatly during glasses usage
Data Source
AI summary
The present disclosure is directed to retinal display projection device comprising a projection component arranged for projecting an image directly onto the retina of a user wearing the device. The projection device further comprises an eye gaze detection module arranged to take an eye image of a user's eyes and to activate the projection component if a pupil of the user is in a predetermined position in said eye image.