VR Cadence Profile Adjustments for HMD Motion Sickness
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Solution Overview
Problem
Motion sickness occurs in users of head-mounted displays (HMDs) due to a disconnect between the expected movements in real-world environments and the movements presented in virtual reality environments, leading to an unnatural feeling of sliding rather than walking.
Innovation Solution
The implementation of cadence profiles, detected using inertial sensors, is used to adjust image data in HMDs, replicating the rhythmic movements of a user's head in real-world environments, thereby synchronizing the camera view within virtual reality environments to match real-world movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the VR environment presents smooth, continuous movement without cadence adjustments, then the navigation is simple and responsive, but motion sickness occurs due to disconnect from real-world movement expectations
Solution Approach 1:
The patent applies parameter changes by modifying the movement parameters of the VR camera view to include vertical rhythmic movements that simulate real-world head motion during walking. The cadence profile adjusts the frequency and amplitude of vertical movement to match expected real-world cadence, thereby reducing motion sickness while maintaining navigation responsiveness.
2Adaptability or versatility
If the HMD displays realistic VR environments with immersive graphics, then user engagement increases, but the mental disconnect between real-world and virtual movement exacerbates motion sickness
Solution Approach 1:
The patent implements feedback by detecting the user's actual head movement through inertial sensors and using this information to adjust the camera view in the VR environment. The system provides feedback by synchronizing the virtual camera movement with the user's physical head movements, creating a more natural experience that reduces the mental disconnect and associated motion sickness.
3Object-affected harmful factors
If the system applies cadence profile adjustments to match real-world movement, then motion sickness is reduced, but the device complexity increases due to sensor integration and image processing
Solution Approach 1:
The patent applies universality by using the existing inertial sensors already present in the HMD for multiple purposes: tracking head orientation, detecting head movement, and now also for extracting cadence profiles to adjust camera view. This multi-functional use of sensors reduces the need for additional dedicated hardware while achieving motion sickness reduction.
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
This approach reduces motion sickness by providing a more natural and immersive experience, as the movement within virtual reality environments approximates real-world movements, enhancing user engagement and comfort.
Implementation Method 1
detected using inertial sensors
Data Source
AI summary
A method, system, computer readable media and cloud systems are provided for adjusting image data presented in a head mounted display (HMD). One method includes executing a virtual reality (VR) session for an HMD user. The VR session is configured to present image data to a display of the HMD. The image data is for a VR environment that includes a VR user controlled by the HMD user. The method further includes adjusting the image data presented on the display of the HMD with the cadence profile when the VR user is moved in the VR environment by the HMD user. The adjusting causes a movement of a camera view for the image data that is for the VR environment as presented on the display of the HMD. In some examples, the cadence profile substantially replicates a rhythmic movement of a person while moving in a real world environment.