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

Claim 11:
12. The keyboard system of claim 1:
wherein the first layer of the substrate further comprises a third array of spiral traces, each spiral trace in the third array of spiral traces:
adjacent a first spiral trace in the first array of spiral traces;
coiled in the second direction; and
defining a fifth end and a sixth end, the fifth end electrically coupled to the first end of the first spiral trace;

wherein the second layer of the substrate further comprises a fourth array of spiral traces, each spiral trace in the fourth array of spiral traces:
adjacent a second spiral trace in the second array of spiral traces;
coiled in the first direction;
defining a seventh end and an eighth end, the seventh end electrically coupled to a sixth end of a third spiral trace in the third array of spiral traces;
cooperating with a first spiral trace in the first array of spiral traces, the second spiral trace, and the third spiral trace to form an inductor, in the array of inductors, below a key location in the array of key locations; and
cooperating with the third spiral trace to form a second loop of the inductor, the second loop of the inductor defining a secondary axis parallel to and offset from a primary axis of a first loop of the inductor;

wherein the first magnetic element comprises:
a first magnet:
arranged over a primary axis of a first loop of the first inductor; and
defining a first polarity facing the first inductor; and

a second magnet:
adjacent the first magnet;
arranged over a secondary axis of a second loop of the first inductor; and
defining the first polarity facing away from the first inductor; and

wherein the controller is configured to drive the oscillating voltage across the first inductor during the first haptic feedback cycle to:
induce alternating magnetic coupling between the first magnet and the first loop of the first inductor;
induce alternating magnetic coupling between the second magnet and the second loop of the first inductor; and
oscillate the tactile layer, at the first key location, normal to the substrate.