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US 10,136,543 B1Granted
Inductance-based user interface elements
AssigneeFitbit, Inc.
InventorsAditya Vivekanand Nadkarni, Allen Yu-Li Wang, Benjamin Patrick Robert Jean Riot, Reza Yazdani, Dennis Alejandro Grijalva, Edison Tam King Miguel, Vaibhav Kiran Mistry, Yonghua Wei
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Abstract
Mechanisms for providing inductance-based user interface elements are provided. Some implementations of such inductance-based devices may feature very small gaps between the housing and the inductive coil, as well as various features to aid in improving sensor sensitivity and reducing the possibility of false button-push events.
Claims20
An apparatus comprising:
- a housing having a first interior surface;
- a substrate proximate to the first interior surface and separated from the first interior surface by a first gap along a first axis perpendicular to the first interior surface, wherein the substrate includes one or more inductive button coils and is selected from the group consisting of:
- a flexible printed circuit (FPC) and a rigid printed circuit board (PCB);
- and
- one or more compressive diodes interposed between the first interior surface and the substrate, wherein:
- the first interior surface is planar,
- the one or more compressive diodes have a thickness in a direction perpendicular to the first interior surface that is equal to the first gap,
- the first gap is between 0.02 mm and 0.2 mm, and
- the first interior surface, the substrate, the one or more inductive button coils, and the one or more compressive diodes form part of an inductive button.
6 more elements
Dependencies are inferred from the claim text.