Invention Grant
- Patent Title: Methods and devices for haptic communication
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Application No.: US17092827Application Date: 2020-11-09
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Publication No.: US11969554B2Publication Date: 2024-04-30
- Inventor: Zi Chen , John X. J. Zhang , Frances Lau , Ali Israr
- Applicant: The Trustees of Dartmouth College , FACEBOOK, INC.
- Applicant Address: US NH Hanover
- Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE,FACEBOOK, INC.
- Current Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE,FACEBOOK, INC.
- Current Assignee Address: US NH Hanover; US CA Menlo Park
- Agency: Cozen O'Connor
- Main IPC: H10N30/857
- IPC: H10N30/857 ; A61F2/70 ; A61M21/00 ; B06B1/02 ; B06B1/06 ; A61F2/54 ; A61F2/68

Abstract:
A haptic stimulator includes a multilayer sheet with a piezoelectric or electroactive polymer layer adapted to mechanically deform upon application of voltage, the multilayer sheet secured to a substrate, and a source of electrical stimulation coupled to drive electrodes on the polymer layer with an AC signal to vibrate the polymer layer. In particular embodiments, the polymer contains polyvinylidene fluoride, and electrodes are patterned to control local electric fields. Another haptic stimulator has first and second electrodes with an air gap and an insulating sheet between first and second electrodes, with an AC voltage driver connecting to the electrodes. In a method of providing haptic stimulation to skin an alternating current supply drives first and second electrodes, the electrodes disposed upon either a piezoelectric or electroactive polymer sheet, vibrating the polymer layer by driving the electrodes; and coupling vibrations of the polymer layer to the sensate skin.
Public/Granted literature
- US20210052845A1 METHODS AND DEVICES FOR HAPTIC COMMUNICATION Public/Granted day:2021-02-25
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