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논문 기본 정보

자료유형
학술대회자료
저자정보
이은강 (카이스트) 최협 (카이스트) 김명섭 (카이스트) 박준혁 (카이스트) 이용우 (삼성 디스플레이 연구소) 박수경 (카이스트)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2016년도 학술대회
발행연도
2016.12
수록면
905 - 909 (5page)

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Virtual reality (VR) related products are newly rising on electronics and entertainment market. Head Mounted Display (HMD) is one of the popular instrument to implement VR environment. However, HMD system has latency which is time delay between user’s motion and display. One of the reason for Motion Sickness (MS) or Simulator Sickness (SS) is known as sensory conflict and when there are more latency in HMD system, resultant sensory conflict will be greater. Therefore HMD manufacturers pursue less latency as possible, but at some point, it costs too much and if perceptional thresholds for latency exist, then amount of latency which is cost-efficient may exist too. Therefore in this study, we measured degree of MS as latency increases, under medial-lateral (ML) direction stimulus to find perceptional threshold of MS and SSQ (Simulator Sickness Questionnaire) was used to measure subjects’ MS/SS. Experiment 1 was done with 8 healthy male subject. Firstly we measured HMD system’s latency and added extra time delay to change latency condition from minimum to around 200 ms. Then sinusoidal motion stimulus with 0.25 Hz frequency and 1.23 m/s^2 peak acceleration was applied. Experiment 2 was done with 5 healthy male subjects and motion stimulus was changed to 0.32 Hz frequency and 2.0 m/s^2 acceleration, with ML movement in VR space is doubled and latency range increased to 400 ms. First experiment’s result did now show any meaningful changes in MS, but second experiment’s result had threshold-like increase in MS near 200~400 ms latency range. However, some subject had very low MS and did not show any changes in MS during experiment. This result may imply that for those are sensitive to MS, under ML directional motion stimulus, perceptional threshold exists around 200~400 ms latency. Also, for those are not sensitive to MS, latency had less or no effect on MS.

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UCI(KEPA) : I410-ECN-0101-2017-550-002057521