公开(公告)号：US20220214764A1

公开(公告)日：2022-07-07

申请号：US17142667

申请日：2021-01-06

Applicant: SYNAPTICS INCORPORATED

Inventor： Kelvin FONG

IPC: G06F3/044 ,  G06F3/0362 ,  G06F3/041 ,  H01H25/06

Abstract: A method of detecting shift of a rotatable interface is disclosed. The rotatable interface has a fixed base with a conductive region on a bottom surface, the fixed base attached to a display screen of an input device. The method includes providing, during a first time period, a reference signal to first and second sets of electrodes of the input device that are each capacitively coupled to the conductive region. The method further includes, during a second time period, providing the reference signal to the first set of electrodes, providing a sensing signal to the second set of electrodes, and receiving, during the second time period, a resulting signal on the second set of electrodes. The method still further includes determining a translation of the rotatable interface relative to the display screen based, at least in part, on the resulting signal values received during the second time period.

公开(公告)号：US20210232260A1

公开(公告)日：2021-07-29

申请号：US17142655

申请日：2021-01-06

Applicant: SYNAPTICS INCORPORATED

Inventor： Kelvin FONG ,  Chun-Hsi CHEN ,  Robert J. BOLENDER

IPC: G06F3/044 ,  G06F3/0362 ,  G06F3/041 ,  H01H25/06

Abstract: A rotatable device has a stationary base including bottom and top surfaces. The bottom surface has a first set of coupling electrodes configured to receive a reference signal from first electrodes of an attached input device, and second and third sets of coupling electrodes each configured to receive resulting signals from a second set of input device electrodes. The top surface of the stationary base has first, second and third top regions respectively connected to the first, second and third sets of coupling electrodes. The rotatable device further includes a rotary wheel, configured to rotate relative to the stationary base, with a bottom portion provided with alternating conductive and non-conductive regions and configured to align with the top portion of the stationary base. The resulting signals of the input device are modified by the relative positions of the stationary base and the rotary wheel.