Retinal Projection Image Shift for Peripheral Gaze Control
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Solution Overview
Problem
Existing image projection apparatuses that project images onto a retina struggle to allow users to gaze at peripheral portions of the projected image effectively, as the image follows the moving pupil, making it difficult to focus on edges of the image.
Innovation Solution
The apparatus includes a light source, a projection unit, and processing units that obtain position information on the projection area through which the light beam passes and control the projection image based on this information and the position of the light beam, allowing the image to be adjusted and shifted to maintain visibility at the edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image projection apparatus causes the laser beam to follow the pupil movement, then the user can view the image even when moving their pupil, but the user cannot gaze at peripheral portions of the image because the projected image follows the moving pupil
Solution Approach 1:
The patent applies local quality by differentiating the behavior of different parts of the projection system. The center of the projection image is coupled to pupil movement to ensure visibility, while peripheral portions are decoupled to allow independent gaze control. This allows the user to move their pupil to view the image while maintaining the ability to gaze at specific peripheral portions without the entire image shifting.
2Reliability
If the focused spot of the laser beam does not coincide with the position of the pupil, then the laser beam can be blocked by the iris, but the apparatus needs to accommodate pupil movement to maintain image projection
Solution Approach 1:
The patent applies preliminary action by pre-positioning the laser beam within the pupil aperture before pupil movement occurs. The beam control system anticipates pupil movement and adjusts the beam position in advance to ensure it remains within the iris opening, preventing blockage and maintaining reliable image projection without requiring complex real-time tracking.
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 solution enables users to easily gaze at peripheral portions of the projected image by dynamically adjusting the projection image based on the user's pupil movement, preventing the image from being blocked by the iris and ensuring continuous visibility.
Implementation Method 1
a light source configured to emit a light beam based on image data
Implementation Method 2
an image projection apparatus that focuses a laser beam for image formation near a pupil of a user
Data Source
AI summary
An apparatus includes a light source configured to emit a light beam based on image data, a projection unit configured to project the light beam onto a pupil of a user, and at least one processor and a memory coupled to the processor storing instructions that, when executed by the processor, cause the processor to function as: an obtaining unit configured to obtain position information on a projection area through which the light beam to be projected onto a retina of the user passes, and a control unit configured to control a projection image to be projected onto the retina with the light beam based on the image data. The control unit controls the light source such that the projection image is changed based on the position information on the projection area and a position of the light beam.