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

Claim 15:
16. A keyboard system comprising:
a substrate comprising:
an array of electrodes; and
an array of inductors arranged below the array of electrodes;

a tactile layer:
arranged over the substrate; and
defining an array of key locations over the array of sense electrode and the array of inductors;

an array of magnetic elements, each magnetic element in the array of magnetic elements:
arranged within the tactile layer at a key location in the array of key locations; and
configured to inductively couple to an adjacent inductor in the array of inductors; and

a controller configured to:
read electrical values in the form of capacitance values from the array of electrodes; and
at a first time, in response to a first capacitance value, read from a first sense electrode in the array of electrodes, exceeding a first threshold capacitance value corresponding to a minimum keystroke force:
register a first keystroke of a first key type associated with a first key location, in the array of key locations, defined over the first sense electrode; and
drive an oscillating voltage across a first inductor, arranged below, the first sense electrode, during a first haptic feedback cycle to:
induce alternating magnetic coupling between the first inductor and a first magnetic element, in the array of magnetic elements, arranged within the tactile layer below the first key location; and
oscillate the tactile layer, at the first key location, relative to the substrate.