Invention Grant
- Patent Title: Electro-permanent-magnet-based force profile for an input element on an input device
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Application No.: US17553549Application Date: 2021-12-16
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Publication No.: US11721463B2Publication Date: 2023-08-08
- Inventor: Nuno Miguel Pereira dos Anjos Valverde , Jan Stoeckli , Kevin Forde , Artur Miller
- Applicant: Logitech Europe S.A.
- Applicant Address: CH Lausanne
- Assignee: Logitech Europe S.A.
- Current Assignee: Logitech Europe S.A.
- Current Assignee Address: CH Lausanne
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: H01F7/04
- IPC: H01F7/04 ; H01F7/02 ; H01F13/00 ; G01R33/07

Abstract:
An input device comprising a processor(s), an input element, an electropermanent magnet (EPM) assembly including: a permanent magnet operable to generate a magnetic field; and a magnetizing assembly configured to set a magnetic field generated by the permanent magnet, a first ferromagnetic element, and a second ferromagnetic element. The first ferromagnetic element is configured to part and move away from the second ferromagnetic element as the input element is depressed. When the EPM assembly magnetizes the permanent magnet to a first polarity, the first and second ferromagnetic elements are magnetically attracted to each other and provide an attracting that magnetically opposes the first and second ferromagnetic elements from parting, and when the EPM assembly magnetizes the permanent magnet to a second polarity, the first and second ferromagnetic elements are not magnetically attracted to each other and do not magnetically oppose the first and second ferromagnetic elements from parting.
Public/Granted literature
- US20230197323A1 ELECTRO-PERMANENT-MAGNET-BASED FORCE PROFILE FOR AN INPUT ELEMENT ON AN INPUT DEVICE Public/Granted day:2023-06-22
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