Adaptive In-Cabin Projection to Reduce Vehicle Motion Sickness
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Solution Overview
Problem
Motion sickness in vehicle passengers, particularly those in rear seats with limited view of the road, is exacerbated by larger vehicle displays, leading to discomfort and reduced safety due to passengers being unable to use these displays during travel.
Innovation Solution
A system that projects adaptive moving images onto an interior surface of the vehicle, aligned with the passenger's sensory inputs, using sensors and an evaluation unit to categorize content and adjust image parameters based on vehicle movement, surroundings, and passenger status to align vestibular and visual inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If larger displays are installed in the vehicle to enhance entertainment and infotainment functionality, then entertainment capability is improved, but motion sickness increases due to reduced passenger view of the road and landscape
Solution Approach 1:
A projection device is introduced as an intermediary element that projects moving images onto the windshield or dashboard, creating a visual mediator between the passenger and the external environment. This allows passengers to view entertainment content while maintaining a reduced view of the road, thereby reducing the sensory conflict that causes motion sickness while still providing entertainment functionality
Solution Approach 2:
The system dynamically adjusts parameters of the projected images including brightness, contrast, and content type based on vehicle motion data from sensors. By changing these parameters in response to vehicle acceleration, deceleration, and directional changes, the system optimizes the visual input to match vestibular sensations and reduce motion sickness
2Ease of operation
If passengers view static content on displays or read books during vehicle motion, then entertainment functionality is provided, but motion sickness occurs due to mismatch between vestibular system sensing movement and visual system perceiving static images
Solution Approach 1:
The projection system transforms static display content into dynamic moving images that are projected onto the windshield or dashboard. The projected images move and change in response to vehicle motion, creating a dynamic visual environment that matches the passenger's vestibular sensations and prevents motion sickness while maintaining entertainment functionality
Solution Approach 2:
The system uses periodic motion patterns in the projected images that correspond to the periodic nature of vehicle motion. By synchronizing the movement and changes in the projected visual content with the rhythmic patterns of vehicle acceleration and deceleration, the system creates a harmonious sensory experience that reduces motion sickness
3Object-affected harmful factors
If moving images are projected to align with passenger's sensory inputs, then motion sickness is reduced, but device complexity increases due to additional sensors and evaluation units
Solution Approach 1:
The evaluation unit serves multiple functions: it processes data from various sensors (accelerometers, gyroscopes, cameras), categorizes passenger state and vehicle motion, and controls the projection parameters. By making the evaluation unit multi-functional, the system reduces the need for separate dedicated components for each function, thereby managing complexity while achieving motion sickness reduction
Data Source
AI summary
A system and associated method for reducing motion sickness for a passenger of a moving vehicle includes an image provision device configured to provide moving images, which include a parameter, to a projection device. The system further includes a device configured to provide a first signal to an evaluation unit and an evaluation unit configured to assign the first signal to a category out of a group of predetermined categories. The image provision device is further configured to receive a second signal from the evaluation unit representing the assigned category, and the image provision device is further configured to adapt the parameter of the moving images dependent on the assigned category. The projection device is configured to project the adapted moving images to an interior surface of the vehicle, wherein the interior surface is at least partially located in a field of view of the passenger.