Eye Tracking Image Projection Device Pupil Speed Control
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Solution Overview
Problem
Existing image projection devices that control images based on eye movement lack versatility in performing different controls, particularly in adjusting image projection positions and content based on varying eye speeds and directions.
Innovation Solution
An image projection device equipped with a projection unit, a detection unit that tracks pupil movement and speed, and a control unit that performs distinct image controls depending on the speed and direction of pupil movement, allowing for adjustments in image projection position and content, including switching between different images or icons when specific speed thresholds are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image projection device controls the image based on eye movement direction only, then the control mechanism is simple, but the versatility of performing different controls is insufficient
Solution Approach 1:
The patent applies parameter changes by detecting not only the direction of eye movement but also the speed of pupil movement, and using these varying parameters to trigger different control operations. When the pupil moves at different speeds in the same direction, the system performs different controls (e.g., scrolling at normal speed, turning pages at high speed), thereby enhancing versatility without requiring a completely new control mechanism.
2Measurement precision
If the detection unit detects only the direction of pupil movement, then the detection mechanism is simple, but the precision of controlling different image operations is insufficient
Solution Approach 1:
The detection unit is enhanced to detect multiple parameters including both the direction and speed of pupil movement. By measuring the speed of pupil movement in addition to direction, the system achieves higher precision in distinguishing between different user intentions (e.g., casual viewing vs. intentional page turning), enabling more precise control of image operations.
Data Source
AI summary
An image projection device includes: a projection unit that projects an image light beam forming an image onto a pupil of an eyeball of a user to project the image onto a retina of the eyeball; a detection unit that detects a direction in which the pupil has moved relative to a face of the user and a speed of movement of the pupil; and a control unit that performs different controls of the image when the pupil has moved at different speeds in a same direction.