Localizable Button Click Rendering via Active Lateral Force Feedback

Xu, Heng; Klatzky, Roberta L.; Peshkin, Michael A.; Colgate, J. Edward

doi:10.1109/toh.2020.2990947

Cited by 1 publication

(2 citation statements)

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“…The former is tuned to the first longitudinal resonance of the UltraShiver. Even though the device shows good ability to control the lateral force, render convincing haptic effects, and localize them [6,11], it cannot provide a consistent magnitude of the lateral force over a large area due to the mode shape. The lateral force decreases to zero as the finger moves toward the nodal line, which is close to the center of the surface.…”

Section: Background and Motivationmentioning

confidence: 99%

“…Compared with friction modulation methods (ultrasonic friction modulation [1,2], electroadhesion [3,4]), a surface providing active lateral force feedback may render a wider range of haptic effects. Included are effects such as potential well rendering [5] that require propulsive forces, and effects such as button click rendering [6] that require active forces on a stationary finger. In an effort to realize these benefits, a variety of interesting devices have been developed with the goal of providing active lateral force feedback.…”

Section: Introductionmentioning

confidence: 99%

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SwitchPaD: Active Lateral Force Feedback over a Large Area Based on Switching Resonant Modes

Peshkin

Colgate

2020

Lecture Notes in Computer Science

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We present a new device, the SwitchPaD, to generate an active lateral force on a bare fingertip over a large touch area. Like our previous device, the UltraShiver, the SwitchPaD uses synchronization of in-plane ultrasonic oscillation and out-of-plane electroadhesion to generate force. The UltraShiver, however, relied on a single longitudinal resonance to produce oscillations, resulting in an inconsistent force profile. The SwitchPaD switches between the first and the second longitudinal mode based on the finger position, resulting in a much more consistent force profile across the touch surface. Experiments are used to compare the performance of two different modal switching strategies. Results indicate that the SwitchPaD can generate 250 mN peak active lateral force over a large area, and that, with the proper switching strategy, the switch itself is imperceptible.

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Section: Background and Motivationmentioning

confidence: 99%