114. Haptic, Touch, and Physical Display
発表担当
目次
説明
We explore how a display surface can physically emerge on demand to support both mid-air visualization and direct touch interaction. We introduce blooming, a concept that repurposes Persistence-of-Vision (POV) motion to deploy a large, touchable surface from a compact, relocatable device. Using a soft, rotating line with arch-shaped electrodes, our system renders dynamic mid-air visuals while enabling direct touch input on the manifested surface. Realizing this concept requires addressing the unique challenges of touching spinning elements, including ensuring safety, minimizing disturbances to rotation caused by touch, and detecting brief unstable touches during spinning. We present a safety-oriented device design, special blades effective in minimizing finger disturbance, and optimization techniques tailored to transient, noisy touches. We also reveal how rotation speed and electrode height significantly affect sensing accuracy and user experience. Finally, we demonstrate applications that show how blooming touch displays can flexibly augment everyday objects and environments.
日本語まとめ
説明
Effective force feedback is critical for user immersion in VR. However, current solutions have limitations; ungrounded devices using propellers or air-jets often suffer from slow response times and bulky hardware, body-worn devices tend to hinder hand movement, and wrist-worn force-feedback devices usually restrict free wrist movement. To address these challenges, we present ConCon, a wrist-worn 3-DoF force-feedback device utilizing motors with electromagnetic clutches. ConCon's three actuation units apply force to wrist along the radial/ulnar-deviation, flexion/extension, and proximal/distal directions. Clutches can control force transmission continuously, discretely, or impulsively by suddenly releasing a loaded-state. They also enable unimpeded free movement by minimizing mechanical resistance. We first evaluated ConCon's technical performance, including force output, wrist manipulation range, wrist impedance while free movement, and clutch response time. Subsequently, a user study (N=12) across six VR scenarios (Slingshot, Door, Fishing, Handfan, Pistol, Spray) showed ConCon provided significantly higher fun, immersion, and realism than vibrotactile feedback.
日本語まとめ
説明
New tangible input techniques are transforming human-computer interaction. Point-contact devices such as joysticks or buttons are simple and scalable, but they capture limited spatial information. In contrast, surface-based contact interfaces such as touchpads provide richer spatial input but require larger instrumented surfaces. We present MagBall, a magnetic-ball sensor that captures fine-grained interactions, including displacement and force, through the rotation of a magnet-embedded ball over a 3D Hall-effect sensor array. Our design localizes diverse physical interactions to a single point-contact yet operates at multiple scales from millimeters to meters. Our machine learning models can infer the displacement and force with root-mean-squared errors of 0.15 mm and 0.67 N. Furthermore, our device supports interactions across diverse surfaces such as glass, metal and human skin, without additional instrumentation. We demonstrate applications in stylus pens, wearable trackballs and smart massage tools, which naturally aligns with the rolling mechanism of MagBall.
日本語まとめ
説明
We propose a technique for accelerating users’ action without overriding intention, thereby preserving agency. In our approach, it is the user’s muscle signals, detected via electromyography (EMG), that trigger electrical-muscle-stimulation (EMS) without external sensors or stimulation-timing calibration. The key to enable this “agentic speedup” is a synergy between EMG and EMS: EMG can detect an early-onset of the neural-response; EMS can contract a muscle faster than a typical voluntary-contraction. This–coupled with our low-latency system (~290 us)–results in an accelerated reaction-time, even though the haptic-assistance is initiated after the muscle-signal. In our study, we confirmed that our novel approach: (1) accelerated users’ reaction-time by ~23 ms compared to voluntary-action; (2) preserved agency in decision-involving actions (i.e., go/no-go trials), which existing muscle-stimulation techniques cannot achieve; and (3) participants felt it augmented their performance in physical-tasks. This puts forward embodied-assistance that aligns with users’ decisions/intentions, which we demonstrate in exemplary applications.
日本語まとめ
説明
While many modern gaming environments provide haptic feedback, laptop keyboard gaming remains largely without rich tactile interaction, despite a rapidly growing audience. In this paper, we propose the HapPalm interface, a novel laptop interface concept that delivers rich spatio-temporal vibrotactile feedback through the palmrest area, allowing players to feel game events with their palms. Our prototype uses dual 4×6 linear resonant actuator arrays. To render various game events with the HapPalm interface, our first study aims to create a haptic pattern dataset. Iterative design workshops identified 11 haptic pattern templates, of which our second study validated that they convincingly convey diverse game events. Our final study embedded these patterns into a custom game, showing that spatial haptics significantly improved fun, immersion, realism, and presence compared to non-spatial or no-haptic conditions. HapPalm interface demonstrates that palmrest-based haptics can enrich keyboard-only laptop gaming, providing an expressive and immersive tactile channel for future laptop interfaces.
日本語まとめ
説明
We present Y-zipper, a novel three-sided 3D-printed zipper structure that enables three flexible strips to interlock and transform into a rigid rod-like form. Building on this flex–rigid transition mechanism, we further design a specialized slider to achieve rapid and reversible zipping interactions. This slider serves as the basis for three actuation methods—manual, dynamic mechanical, and static mechanical—which enable both remote control and automated closure and release. In addition, Y-zipper provides four motion primitives: straight, bend, coil, and screw, whose combinations extend the flex–rigid transition mechanism to spatial curve structures. To support customization, we develop a computational design tool that automatically generates zipper geometry based on input primitives, unfolds the structure for 3D printing, and embeds both teeth and compliant bridges. Controlled experiments evaluate its mechanical properties, repeatability, and actuation speed, demonstrating robustness and reliability. Finally, we showcase a series of functional prototypes, including a medical wrist brace, a kinetic art installation, and a rapidly deployable tent structure.
日本語まとめ
説明
We present a fabrication system called AirForce that allows users to create large-scale, load-bearing animated structures from a single inflatable tube. AirForce builds on the personal fabrication of animated truss structures, based on which it replaces not only the static elements with tube, but also introduces tube-based actuators that integrate with that same tube. This ‘single-tube’ design affords efficient single-person assembly, excellent power-to-weight ratio, easy transport and setup, and 100% material reuse. We show three variants of actuators: buckling actuators for pushing, muscle actuators for pulling, and telescoping actuators for large forces. Our blender plugin enables users to place actuators in structures and export instructions for efficient fabrication. We demonstrate a 6DOF motion platform that lifts humans and an 8m high animatronic T-rex that animates with 3DOF, enabled by custom hardware components. In our technical evaluation, the three actuators delivered 480N, 1420N, and 2330N peak forces, respectively.