Eye-Tracked Display Position Control for Motion Sickness Relief
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Solution Overview
Problem
Existing display technologies in moving bodies, such as vehicles and trains, do not effectively address visually induced motion sickness caused by video flow due to displacement relative to the user's eye, as in Japanese Unexamined Patent Application Publication No. 2021-160379 A is not compatible with these uses.
Innovation Solution
A display control device that detects the relative displacement between the user's eye and the display unit, and adjusts the display position of the video to align with the user's eye position, thereby reducing the video flow angle and speed to alleviate motion sickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is used in a moving body, then the user can access information or entertainment, but visually induced motion sickness occurs due to video flow caused by displacement relative to the user's eye
Solution Approach 1:
The patent applies dynamics by making the display position adjustable and adaptive. The display control unit dynamically shifts the display position within the display area based on detected user eye position and displacement information, transforming a static display into a dynamic one that compensates for motion, thereby reducing motion sickness while maintaining usability in moving bodies
Solution Approach 2:
The patent implements feedback by using the displacement amount detection unit to continuously monitor the relative position between the user's eye and the display device. This feedback information is fed back to the display control unit, which adjusts the display position accordingly, creating a closed-loop system that actively compensates for motion-induced visual discomfort
2Device complexity
If the display position is fixed, then the device structure is simple, but the video flow speed is high causing motion sickness
Solution Approach 1:
The system transitions from a fixed display position to a dynamic, adjustable display position that responds to user displacement. This dynamic adjustment slows the effective video flow speed relative to the user's eye, reducing motion sickness while adding only necessary control complexity
Solution Approach 2:
The patent changes the display position parameter dynamically based on detected displacement conditions. By adjusting the display position within the display area according to user eye movement and displacement information, the system modifies the visual flow characteristics to reduce motion sickness without requiring complex structural changes
3Object-affected harmful factors
If the display position is adjusted to reduce video flow speed, then motion sickness is suppressed, but the display control complexity increases
Solution Approach 1:
The system performs self-service by automatically detecting user displacement and adjusting display position without requiring manual user input. The displacement amount detection unit and display control unit work autonomously to compensate for motion, reducing the need for complex user interaction interfaces while managing control complexity internally
Solution Approach 2:
The patent introduces an intermediary approach by using displacement information as a mediator between the physical motion state and the display control. Instead of directly tracking eye position or motion vectors, the system uses detected displacement amount as an intermediate parameter to drive display position adjustment, simplifying the control mechanism while achieving motion sickness suppression
Data Source
AI summary
The display control device includes a displacement amount detection unit that detects a relative displacement amount between the position of the user's eye viewing the display area of the display unit and the position of the display unit, and a display control unit that performs control to move the display position of the image in the display area to the position of the user's eyes based on the relative displacement amount detected by the displacement amount detection unit.