VR Head-Motion Displacement Control to Reduce Motion Sickness
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Solution Overview
Problem
Existing VR technologies often cause motion sickness due to inconsistencies between visual and bodily sensations, with current control methods being inconvenient, limiting user experience and immersion.
Innovation Solution
A VR control method that matches displacement instructions with the shaking direction of the user's head, using an instruction matching rule to ensure the vestibular system is stimulated naturally, thereby reducing motion sickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional VR control methods (hand pulling, arm swinging, pushing hamster ball) are used to reduce motion sickness, then motion sickness symptoms are relieved, but movement speed becomes too slow and does not match real-world movement patterns
Solution Approach 1:
The patent changes the control parameter from manual device operation to natural head movement detection. By detecting head shaking directions and matching them with displacement instructions, the system enables faster movement speeds while maintaining motion sickness relief through natural vestibular stimulation.
Solution Approach 2:
The patent replaces manual mechanical control (hand pulling, arm swinging) with automatic detection of natural head movements using gyroscopes and gravity sensors. This substitution allows the system to interpret intent faster and execute movements at appropriate speeds without manual intervention delays.
2Object-affected harmful factors
If teleportation control mode is used to reduce visual stimulation and avoid nausea, then motion sickness is reduced, but immersion experience and real-world movement alignment are compromised
Solution Approach 1:
The patent implements dynamic control where movement execution depends on real-time head movement detection. Instead of static teleportation or continuous slow movement, the system dynamically adjusts based on detected head shaking directions, enabling natural-looking movement that maintains immersion while preventing nausea through vestibular alignment.
Solution Approach 2:
The patent incorporates feedback by continuously detecting head movements and using them to validate or adjust displacement instructions. This feedback loop ensures movements align with user intent and vestibular sensations, maintaining immersion while preventing the disorientation that causes nausea.
3Adaptability or versatility
If vehicle-based VR control is used to simulate real-world movement, then immersion is improved, but motion sickness similar to carsickness or seasickness still occurs
Solution Approach 1:
The patent performs preliminary validation by detecting head shaking directions before executing displacement instructions. This preliminary action ensures that movements are pre-aligned with vestibular intent, preventing the mismatch between visual and bodily sensations that causes motion sickness, while still enabling immersive vehicle-like movement experiences.
4Speed
If head movement detection is used to control VR displacement, then movement speed and naturalness are improved, but control precision and accuracy may be compromised
Solution Approach 1:
The patent uses partial head shaking movements (rather than full-range motions) to indicate directional intent. By detecting even small shaking directions and matching them with appropriate displacement instructions, the system achieves precise control while maintaining natural, fast movement speeds without requiring excessive head motion.
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
The method effectively reduces motion sickness by aligning user movements with head movements, enhancing user experience and immersion in VR environments.
Implementation Method 1
The head-mounted device is equipped with a gyroscope and a gravity sensor (G-sensor) to detect the displacement of the head of the VR user
Implementation Method 2
The head-mounted device is equipped with a gyroscope and a gravity sensor (G-sensor) to detect the displacement of the head of the VR user
Data Source
AI summary
A virtual reality (VR) control method is provided. In the method, a VR system detects a shaking direction of a head-mounted device of a VR user after receiving a displacement control instruction from the VR user, and then determines, according to an instruction matching rule, whether the displacement control instruction matches the shaking direction. If so, the VR system executes the displacement control instruction, and if not, the VR system does not execute the displacement control instruction. The virtual reality (VR) control method ensures that a head of the VR user has reacted in advance to stimulate a vestibular system of an inner ear before a VR scene changes, thereby avoiding motion sickness.