A Study on the Motion Sickness Reduction Technology in Vehicle Media Environment

As in-vehicle display viewing environments gain popularity, there is increasing research focused on effectively mitigating motion sickness, which has emerged as a problem due to the media experiences within vehicles. Previous studies on motion sickness induced by visual stimuli have emphasized the importance of minimizing the disparity between the signals received by the vestibular system and visual motion perception to reduce motion sickness. This paper proposes methods to effectively alleviate motion sickness by controlling screen brightness and viewing angles, with a specific emphasis on applying and correlating these techniques with virtual vehicle movements. To maximize the effectiveness of these methods, it is imperative to investigate the real-time differences between motion sickness reduction effects and actual vehicle movements or simulator motion levels. However, this study aims to establish the significance of motion sickness reduction without the need for additional experiments. Motion sickness reduction was achieved by narrowing the field of view (FOV) in consideration of the vehicle's acceleration and angular speed. This reduction was designed to match the virtual vehicle's movements using a motion simulator connected to a head-mounted display (HMD), enhancing the sense of presence and minimizing the discrepancy with vestibular sensations. The experiments conducted confirm that the proposed motion sickness reduction method can potentially reduce motion sickness by up to 40%. Furthermore, the motion data generated by the proposed motion simulator can be integrated with virtual reality (VR) motion data to recreate an environment similar to real vehicle conditions, which is expected to provide motion sickness reduction benefits within actual in-vehicle media environments.