	US 12,449,906 B2
	Haptic keyboard system
Ilya Daniel Rosenberg, Sunnyvale, CA (US); and John Aaron Zarraga, Sunnyvale, CA (US)
Assigned to Cirque Corporation, Sandy, UT (US)
Filed by Cirque Corporation, Sandy, UT (US)
Filed on Aug. 22, 2024, as Appl. No. 18/812,641.
Application 18/812,641 is a continuation of application No. 17/946,931, filed on Sep. 16, 2022, granted, now 12,093,458.
Application 17/946,931 is a continuation of application No. 17/626,669, granted, now 11,880,506, issued on Jan. 3, 2024, previously published as PCT/US2021/053660, filed on Oct. 5, 2021.
Claims priority of provisional application 63/088,359, filed on Oct. 6, 2020.
Prior Publication US 2024/0411375 A1, Dec. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/01 (2006.01); G06F 3/02 (2006.01); H01H 3/00 (2006.01); H01H 13/85 (2006.01); H01H 13/785 (2006.01)

CPC G06F 3/016 (2013.01) [G06F 3/0202 (2013.01); H01H 13/85 (2013.01); H01H 2003/008 (2013.01); H01H 13/785 (2013.01); H01H 2201/036 (2013.01); H01H 2215/05 (2013.01)]

19 Claims

1. A system for detecting touch inputs comprising:

a substrate;

a first inductor arranged on the substrate;

a first key:

defining a first key location; and

arranged over the substrate;

a first magnetic element:

defining a first magnetic polarity; and

configured to inductively couple to the first inductor responsive to force applied to the first key location; and

a controller configured to:

access electrical values from the first inductor; and

at a first time, in response to detecting a first change in electrical value at the first inductor:

trigger an oscillating voltage across the first inductor during a first haptic feedback cycle;

to induce alternating magnetic coupling between the first inductor and the first magnetic element; and

to oscillate the first key relative to the substrate;

wherein the first inductor comprises a set of planar coil traces, the set of planar coil traces comprising:

a first spiral trace:

arranged across a first layer of the substrate, below the first key; and

a second spiral trace:

arranged across a second layer of the substrate, below the first layer;

electrically coupled to the first spiral trace; and

cooperating with the first spiral trace to form a first loop of the first inductor.