Browsing by Author "Yu, Neng-Hao"

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HapticSphere: Physical Support To Enable Precision Touch Interaction in Mobile Mixed-Reality
(2019-01-01)
Wang, Chiu-Hsuan
;
Hsieh, Chen-Yuan
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Yu, Neng-Hao
;
Bianchi, Andrea
;
Chan, Liwei
This work presents I lapticSphere, a wearable spherical surface enabled by bridging a finger and the head-mounted display (HMD) with a passive string. Users perceive a physical support on a finger attached to a string, when extending their arm and reaching out to the string's maximum extension. This physical support assists users in precise touch interaction in the context of stationary and walking virtual or mixed-reality experiences. We propose three methods of attachment of the haptic string (directly on the head or on the body), and illustrate a novel single-step calibration algorithm that supports these configurations by estimating a grand haptic sphere, once a head-coordinated touch interaction is established. Two user studies were conducted to validate our approach and to compare the touch performance with physical support in sitting and walking conditions in the context of mobile mixed-reality scenarios. The results show that, in the walking condition, touch interaction with physical support significantly outperformed the visual-only condition.
PhantomLegs: Reducing Virtual Reality Sickness Using Head-Worn Haptic Devices
(2019-01-01)
Liu, Shi-Hong
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Yu, Neng-Hao
;
Chan, Liwei
;
Peng, Yi-Hao
;
Sun, Wei-Zen
Virtual Reality (VR) sickness occurs when exposure to a virtual environment causes symptoms that are similar to motion sickness, and has been one of the major user experience barriers of VR. To reduce VR sickness, prior work has explored dynamic field-of-view modification and galvanic vestibular stimulation (GVS) that recouples the visual and vestibular systems. We propose a new approach to reduce VR sickness, called PhantomLegs, that applies alternating haptic cues that are synchronized to users' footsteps in VR. Our prototype consists of two servos with padded swing arms, one set on each side of the head, that lightly taps the head as users walk in VR. We conducted a three -session, multi -day user study with 30 participants to evaluate its effects as users navigate through a VR environment while physically being seated. Results show that our approach significantly reduces VR sickness during the initial exposure while remaining comfortable to users.