Touch-sensitive input device with electromagnetic actuator operated at maximum magnetization
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United States of America Patent
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Nov 19, 2019
Grant Date -
Oct 10, 2019
app pub date -
Jun 14, 2018
filing date -
Apr 9, 2018
priority date (Note) -
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Abstract
A touch-sensitive input device includes a support, an input part with a touch-sensitive input surface, an elastic device which bears the input part at the support, an electromagnetic actuator which acts between the input part and the support to produce a deflection of the input part out of a resting position, and control electronics. The electromagnetic actuator comprises a coil with a cavity, a core arranged at least in part in the cavity, and an armature arranged outside the cavity. The core generates a magnetic field defining a pole direction. The armature interacts with the magnetic field. The control electronics generate an electrical control signal for the coil to produce the deflection of the input part out of the resting position and to provide a maximum deflection of the input part. A duration of the electrical control signal is limited so as to provide, after the deflection, a haptic feedback.
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