Abstract: A wearable device, such as a wearable ring device, configured to transition between multiple discrete ring sizes is disclosed. The wearable ring device may include a discontinuous ring-shaped housing that extends radially around at least a portion of a circumference of the wearable ring device, where a first end and a second end of the discontinuous ring-shaped housing are separated from one another by a radial distance and configured to move relative to one another. The wearable ring device may further include one or more sensors positioned at least partially within an inner circumferential surface of the discontinuous ring-shaped housing, and one or more mechanical components configured to transition the wearable ring device between the multiple discrete ring sizes.

Abstract: A wearable device, such as a wearable ring device, configured to transition between multiple discrete ring sizes is described. For example, the wearable ring device may have an adjustable inner circumference and a rigid outer housing. The inner circumference may be adjusted to transition between multiple discrete ring sizes. For example, a wearable ring device may include a ring housing that exhibits a constant outer circumference, where mechanical components of the ring are configured to adjust at least a portion of an inner circumferential surface to transition the ring between the discrete sizes. The ability of the wearable device to transition between multiple discrete sizes may enable the wearable device to achieve a better fit on a user, thereby improving contact between one or more sensors of the wearable device and the skin of the user, leading to more accurate physiological data readings.

Abstract: A wearable device, such as a wearable ring device, configured to transition between multiple discrete ring sizes is described. For example, the wearable ring device may include multiple rings coupled to one another (e.g., adjacent, parallel, or concentric rings), where a user may manipulate or adjust the rings relative to one another to transition between multiple discrete ring sizes. In some cases, the multiple rings may be oval or elliptical-shaped, where rotating the rings relative to one another may change the size of the ring. In some other cases, the multiple rings may be threaded such that they may be screwed into and out of one another. In some other cases, the wearable ring device may include a long housing that may coil into itself to form multiple concentric loops, where coiling or uncoiling the concentric loops adjusts the ring size.

Abstract: Methods, systems, and devices for a functional cover are described. A removable cover (e.g., a functional cover) for a wearable ring device (e.g., a ring wearable) may include one or more electrical components positioned at least partially within the removable cover. In some cases, the functional cover may wireless connect with the ring wearable. The removable cover may further include a first inductive component within the removable cover, where the first inductive component is configured to wirelessly communicate with a second inductive component of the wearable ring device when the removable cover is in a mounted state on the wearable ring device. The first inductive component of the removable cover may be configured to transfer electrical current, data, or both, between the one or more electrical components of the removable cover and one or more additional electrical components of the wearable ring device.

Abstract: Methods, systems, and devices for wireless charger are described. A charging device may include a base configured to receive a ring-shaped wearable device in multiple radial orientations relative to the base. The charging device may also include a magnetic component configured to magnetically attract a magnetic component of the ring-shaped wearable device to orient the wearable device in a single radial orientation relative to the base. The charging device may include an inductive charging component that may wireless charge the wearable device via an inductive charging component of the wearable device based on the inductive charging components being within a threshold distance.

Abstract: Methods, systems, and devices for optical signal measurement are described. A wearable electronic device may activate a first combination of optical sensors, the first combination of optical sensors including a set of transmitter sensors and a set of receiver sensors. In some cases, one or more optical sensor of the first combination of optical sensors may be positioned under a protrusion on an inner surface of the wearable electronic device. The device may measure, at the set of receiver sensors at a first time, one or more signals from the set of transmitter sensors, determine a signal quality metric associated with the one or more signals, and select a second combination of optical sensors for use at a second time based on the signal quality metric.

Abstract: Methods, systems, and devices for wireless charger are described. A charging device may include a base configured to receive a ring-shaped wearable device in multiple radial orientations relative to the base. The charging device may also include a magnetic component configured to magnetically attract a magnetic component of the ring-shaped wearable device to orient the wearable device in a single radial orientation relative to the base. The charging device may include an inductive charging component that may wireless charge the wearable device via an inductive charging component of the wearable device based on the inductive charging components being within a threshold distance.

Abstract: A wearable device is described. The wearable device may be constructed of one or more flexible materials, and may be referred to as a flexible wearable device. The flexible wearable device may include a flexible housing that is made of a material that is elastically deformable, where the flexible housing at least partially surrounds components of the flexible wearable device. The flexible housing may include apertures disposed within the surface of the flexible housing to enable light to be transmitted and received through the flexible housing. The flexible wearable device may also include a printed circuit board (PCB) disposed within the flexible housing (e.g., within a cavity formed by the flexible housing). The PCB may include sensors configured to acquire physiological data from a user by transmitting light and receiving light through the apertures. The PCB may be constructed of flexible regions that are elastically deformable.

Abstract: A wearable device may include a battery. The wearable device may include an arcuate frame to be worn on a finger of a user, where the arcuate frame includes an outer lateral surface and an inner lateral surface, the inner lateral surface configured to be in contact with the finger of a user. The wearable device may include an arcuate charging element disposed within a first lateral edge of the arcuate frame of the wearable device and coupled with the battery. The arcuate charging element may be configured between the outer lateral surface and the inner lateral surface of the arcuate frame of the wearable device. By configuring the wearable device in accordance with examples as described herein, the wearable device may support universal charging.

Abstract: Methods, systems, and devices for optical signal measurement are described. A wearable electronic device may activate a first combination of optical sensors, the first combination of optical sensors including a set of transmitter sensors and a set of receiver sensors. In some cases, one or more optical sensor of the first combination of optical sensors may be positioned under a protrusion on an inner surface of the wearable electronic device. The device may measure, at the set of receiver sensors at a first time, one or more signals from the set of transmitter sensors, determine a signal quality metric associated with the one or more signals, and select a second combination of optical sensors for use at a second time based on the signal quality metric.

Abstract: Methods, systems, and devices for charging a wearable ring device are described. A charging station may include one or more charging elements that are configured to couple with, and facilitate current flow to, corresponding charging elements of a wearable ring device. The charging elements of the charging station, of the wearable ring device, or both may be magnetic so that the wearable ring device is aligned in a charging position when the wearable ring device is inserted into the charging station.

Abstract: Methods, systems, and devices for analyzing fluid using a wearable device are described. The method may include collecting a bodily fluid of a user using a fluid collection component that includes one or more measurement channels configured to change color when exposed to the bodily fluid. Further, the method may include transmitting light associated with one or more wavelengths and generating one or more signals based on the light reflected off the one or more measurement channels of the fluid collection component and received by a wearable device. Moreover, the method may include determining a color of the one or more measurement channels based on the one or more signals and determining a presence or concentration of one or more substances within the bodily fluid based on the color.

Abstract: Methods, systems, and devices for manufacturing a wearable device are described. A method for manufacturing a wearable device may include coupling a printed circuit board (PCB) to an inner ring-shaped housing that contains a plurality of apertures by aligning a plurality of sensors of the PCB with the plurality of apertures. The method may also include coupling an outer ring-shaped housing to the inner ring-shaped housing by surrounding the inner ring-shaped housing with the outer ring-shaped housing. Additionally, the method may include injecting a filler material through an additional aperture of the outer ring-shaped housing to fill a cavity defined by the inner ring-shaped housing and the outer ring-shaped housing, filling at least a portion of the plurality of the inner ring-shaped housing with the filler material.

Abstract: A wearable device is described. The wearable device may be constructed of one or more flexible materials, and may be referred to as a flexible wearable device. The flexible wearable device may include a flexible housing that is made of a material that is elastically deformable, where the flexible housing at least partially surrounds components of the flexible wearable device. The flexible housing may include apertures disposed within the surface of the flexible housing to enable light to be transmitted and received through the flexible housing. The flexible wearable device may also include a printed circuit board (PCB) disposed within the flexible housing (e.g., within a cavity formed by the flexible housing). The PCB may include sensors configured to acquire physiological data from a user by transmitting light and receiving light through the apertures. The PCB may be constructed of flexible regions that are elastically deformable.

Abstract: Methods, systems, and devices for a functional cover are described. A removable cover (e.g., a functional cover) for a wearable ring device (e.g., a ring wearable) may include one or more electrical components positioned at least partially within the removable cover. The removable cover may further include a first electrical component exposed to an external surface of the removable cover, the first electrical component configured to contact (e.g., physical and electrically contact) a second electrical component of the wearable ring device, such as when the removable cover is in a mounted state on the wearable ring device. The first electrical component may be further configured to transfer electrical current, data, or both, between the one or more electrical components of the removable cover and one or more additional electrical components of the wearable ring device.

Abstract: Methods, systems, and devices for a functional cover are described. A removable cover (e.g., a functional cover) for a wearable ring device (e.g., a ring wearable) may include one or more electrical components positioned at least partially within the removable cover. In some cases, the functional cover may wireless connect with the ring wearable. The removable cover may further include a first inductive component within the removable cover, where the first inductive component is configured to wirelessly communicate with a second inductive component of the wearable ring device when the removable cover is in a mounted state on the wearable ring device. The first inductive component of the removable cover may be configured to transfer electrical current, data, or both, between the one or more electrical components of the removable cover and one or more additional electrical components of the wearable ring device.

Abstract: Systems and devices for a ring wearable cover with deformable circumference are described. The removable cover for a wearable ring device may include a ring-shaped surface and one or more mechanical features integrated into the ring-shaped surface and configured to transition between an open state and a closed state. In the closed state, the ring-shaped surface may be configured to extend around a full circumference of the wearable ring device. In some cases, a diameter of the removable cover in the open state is greater than a diameter of the removable cover in the closed state, and the diameter of the removable cover in the closed state is sized to form an interference fit with a surface of the wearable ring device to lock the removable cover onto the wearable ring device when the removable cover is in the closed state.

Abstract: Methods, systems, and devices for optical signal measurement are described. A wearable electronic device may activate a first combination of optical sensors, the first combination of optical sensors including a set of transmitter sensors and a set of receiver sensors. In some cases, one or more optical sensor of the first combination of optical sensors may be positioned under a protrusion on an inner surface of the wearable electronic device. The device may measure, at the set of receiver sensors at a first time, one or more signals from the set of transmitter sensors, determine a signal quality metric associated with the one or more signals, and select a second combination of optical sensors for use at a second time based on the signal quality metric.

Abstract: An apparatus for a wearable device including a locking mechanism for components of the wearable device is described. A wearable ring device may include a ring-shaped housing configured to house one or more sensors configured to acquire physiological data from a user, and a flexible printed circuit board (PCB) including electrical circuitry for the one or more sensors. The wearable ring device may include one or more locking grooves disposed within an interior surface of the ring-shaped housing, the one or more locking grooves configured to receive the flexible PCB and maintain a gap between an inner circumferential surface of the ring-shaped housing and a first surface of the flexible PCB.

Abstract: Methods, systems, and devices for wireless charger are described. A charging device may include a base configured to receive a ring-shaped wearable device in multiple radial orientations relative to the base. The charging device may also include a magnetic component configured to magnetically attract a magnetic component of the ring-shaped wearable device to orient the wearable device in a single radial orientation relative to the base. The charging device may include an inductive charging component that may wireless charge the wearable device via an inductive charging component of the wearable device based on the inductive charging components being within a threshold distance.