Crown for an electronic watch

A wearable electronic device comprising:

• a housing having a side wall;
• a crown comprising:
• a shaft assembly extending along a shaft axis;
• a knob coupled to the shaft assembly and defining:
• an axial end surface;
• and
• a peripheral surface extending about the axial end surface and configured to receive:
• a rotational input that results in a rotation of the crown;
• and
• a radial input that results in a pivot of the crown about a shaft pivot;
• and
• a rotor coupled to the shaft assembly;
• a first laser module configured to direct a first laser beam onto the rotor and receive a first reflected light from the rotor;
• a second laser module configured to direct a second laser beam onto the rotor and receive a second reflected light from the rotor;
• and
• a processing system coupled to the first laser module and the second laser module and configured to determine:
• a parameter of the rotation of the crown;
• and
• a parameter of the pivot of the crown.

An electronic watch comprising:

• a housing;
• a crown configured to receive a rotational input and a translational input and comprising:
• a knob positioned along a side of the housing;
• and
• a rotor coupled to the knob and defining a sensing surface;
• a first laser module configured to direct a first laser beam onto the rotor and configured to receive a first reflected light from the rotor;
• a second laser module configured to direct a second laser beam onto the rotor and receive a second reflected light from the rotor, the second laser beam non-parallel with the first laser beam;
• and
• a processing system coupled to the first laser module and the second laser module and configured to determine:
• a parameter of the rotational input based at least in part on a first interference between the first laser beam and the first reflected light and a second interference between the second laser beam and the second reflected light;
• and
• a parameter of the translational input based at least in part on a third interference between the first laser beam and the first reflected light and a fourth interference between the second laser beam and the second reflected light.