Patent ID: 11880506
Assignee: SENSEL, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. The keyboard system of claim 1, wherein the controller is configured to:
read electrical values from the array of inductors by tracking current flow through the array of inductors;
detect the first change in electrical value comprising a first current moving through the first inductor in a first direction at the first time;
register the first keystroke of the first key type in response to detecting the first current moving through the first inductor in the first direction;
drive the oscillating voltage across the first inductor during the first haptic feedback cycle in response to registering the first keystroke;
detect a second current moving through the first inductor in a second direction opposite the first direction at a second time succeeding the first time;
register release of the first keystroke from the first key location on the tactile layer in response to detecting the second current moving through the first inductor in the second direction; and
drive a second oscillating voltage across the first inductor during a second haptic feedback cycle in response to registering release of the first keystroke from the first key location.