Abstract: A method of operating a laser includes generating a first signal having a first frequency, and generating a second signal having a second frequency. The first frequency varies in accord with an amplitude of a drive current provided to a laser. The method further includes incrementing or decrementing a count responsive to a relationship between the first frequency and the second frequency; determining the count satisfies a threshold count; and modifying operation of the laser when the count satisfies the threshold count.

Abstract: An optical sensing system includes a transmitter side and a receiver side, and is configured to be positioned below a display of an electronic device. The transmitter side includes a light emitter, a temperature sensor, and a photodiode. The receiver side includes a photodiode and a temperature sensor. The optical sensing system includes an application-specific integrated circuit that leverages the temperature sensors, the photodiodes, and one or more signal filters such as a high-pass filter to perform multiple field calibrations of the optical sensing system, thereby improving accuracy and precision thereof.

Abstract: A wearable device is disclosed. The wearable device can comprise a housing; a crown; a proximity sensor; and a processor. The crown can be configured to receive input from a user. The proximity sensor can be configured to generate a field of view encompassing a first area adjacent to the housing and further configured to generate an output signal corresponding to whether an object is present within the field of view. The processor can be configured to determine, based on the output signal, whether the input corresponds to an intentional input or an unintentional input.

Abstract: A compact crown for an electronic device such as an electronic watch, including a set of wipers capable of determining a rotation angle, rotation direction, or rotation speed, is disclosed. The set of wipers is in contact with at least one resistance member at different angular positions around a rotation axis. The crown may have a group of ground taps disposed along the resistance member and a measured signal may vary based on the position of each wiper as it contacts the at least one resistance member. A compact crown may also include capacitive members and capacitive sensors in order to similarly determine rotation angle, rotation direction, or rotation speed.

Abstract: A compact crown for an electronic device such as an electronic watch, including a set of wipers capable of determining a rotation angle, rotation direction, or rotation speed, is disclosed. The set of wipers is in contact with at least one resistance member at different angular positions around a rotation axis. The crown may have a group of ground taps disposed along the resistance member and a measured signal may vary based on the position of each wiper as it contacts the at least one resistance member. A compact crown may also include capacitive members and capacitive sensors in order to similarly determine rotation angle, rotation direction, or rotation speed.

Abstract: A wearable device is disclosed. The wearable device can comprise a housing; a crown; a proximity sensor; and a processor. The crown can be configured to receive input from a user. The proximity sensor can be configured to generate a field of view encompassing a first area adjacent to the housing and further configured to generate an output signal corresponding to whether an object is present within the field of view. The processor can be configured to determine, based on the output signal, whether the input corresponds to an intentional input or an unintentional input.

Abstract: An electronic device is disclosed. In some examples, the electronic device comprises a housing and an input mechanism cooperatively engaged with the housing and configured to rotate in a first direction about a rotation axis. In some examples, the electronic device comprises an input sensor configured to sense an input at the input mechanism based on rotation of the input mechanism. In some examples, the electronic device comprises an actuator coupled to the housing and configured to displace the input mechanism. In some examples, the electronic device comprises a force sensor coupled to the input mechanism and configured to sense an input at the input mechanism based on a force applied to the input mechanism along the second axis.

Abstract: An electronic device includes an input device having a moveable shaft, a reflective surface, an optical energy transmitter, and optical energy receivers that receive optical energy transmitted by the optical energy transmitter and reflected by the reflective surface. Movement of the moveable shaft changes the optical energy received by the optical energy receivers. The movement or position of the shaft may be determined by analyzing the optical energy received. Detectable movement may include rotation, rotation speed, rotation direction, translation, tilt, displacement, and so on. The optical energy receivers may be configured in concentric rings.

Abstract: An electronic device is disclosed. In some examples, the electronic device comprises a housing and an input mechanism cooperatively engaged with the housing and configured to rotate in a first direction about a rotation axis. In some examples, the electronic device comprises an input sensor configured to sense an input at the input mechanism based on rotation of the input mechanism. In some examples, the electronic device comprises an actuator coupled to the housing and configured to displace the input mechanism. In some examples, the electronic device comprises a force sensor coupled to the input mechanism and configured to sense an input at the input mechanism based on a force applied to the input mechanism along the second axis.