Virtual-Space Image Rendering for Vehicle Turn Sickness Reduction
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Solution Overview
Problem
Users experiencing VR sickness when viewing virtual space images on head-mounted displays in vehicles, particularly in autonomous driving cars, due to the mismatch between visual and bodily sensations during turns.
Innovation Solution
A virtual-space-image providing device that determines sections of travel where the vehicle turns and displays a virtual space image that matches the turning pattern of the road shape and direction, using road-route information and turning-image storage to generate and display turning-virtual space images, reducing the discrepancy between visual and bodily experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a virtual space image is displayed on an HMD in a vehicle during turns, then the user can enjoy VR experience, but the user experiences VR sickness due to mismatch between visual and bodily sensations
Solution Approach 1:
The system performs preliminary action by determining turning sections based on road-route information before the vehicle actually turns. The virtual space image is prepared in advance to match the upcoming turning pattern, allowing the visual field to transition smoothly along with the vehicle's turning motion, thereby preventing VR sickness while maintaining VR experience availability
Solution Approach 2:
The system applies dynamics by dynamically switching between straight virtual space images and turning virtual space images based on the vehicle's actual motion state. The virtual space image characteristics (such as view field angle and rendering parameters) are adjusted in real-time according to whether the vehicle is in a straight section or turning section, ensuring the visual experience matches the physical sensation and eliminating the contradiction that causes VR sickness
2Device complexity
If the virtual space image view field remains fixed during vehicle turns, then the image rendering is simple, but the visual experience does not match the vehicle's turning motion causing discomfort
Solution Approach 1:
The system segments the vehicle's travel route into straight sections and turning sections based on road-route information. By dividing the travel path into these distinct segments, the system can apply different virtual space image rendering strategies for each segment type, making the overall system manageable while improving user comfort during turns without excessive complexity
Solution Approach 2:
The system creates a copied representation of the turning pattern from road-route information to generate the turning virtual space image. Instead of complex real-time rendering adjustments, the system uses the predetermined turning pattern data to generate appropriate virtual space images that match the vehicle's turning motion, reducing rendering complexity while improving user comfort
Data Source
AI summary
The invention is provided with: a turning determination unit 13 and an image reproducing unit 14. The turning determination unit 13 determines a section in which an automobile travels with turning, not travels straight, based on road-route information regarding a traveling route and a road on the traveling route. The image reproducing unit 14 displays a selected-virtual space image that is selected in advance in a straight section in which the automobile travels straight, and displays a turning-virtual space image for a view field turning in accordance with a turning pattern determined by a road shape and a traveling direction in a turning section, in the turning section in which the automobile travels with turning. When the automobile turns, a contradiction that occurs between information obtained by the brain through an experience of a user and information obtained by the brain through that the user views the turning-virtual space image displayed on an HMD 200 is reduced, and thus an occurrence that the autonomic nerves cause an abnormal phenomenon is suppressed.