FacePush: Introducing Normal Force on Face with Head-Mounted Displays
summary
An HMD mounts a pulley-driven torque module that pulls belts to press the face, delivering measurable normal force via motors and rotary encoders; calibration maps rotation to pressure and a detection threshold is 2.694 kPa with comfortable levels chosen at 2.7 kPa and 3.375 kPa. Two stimulus modes (impulse and continuous) power three demos—boxing, diving, 360 guidance—and a user study reports increased enjoyment and realism despite weight, noise, and occasional visual blur.
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