Abstract: A pressure sensor comprises an optical source configured to illuminate the tissue of a user, and an optical sensor configured to measure reflected illumination from the tissue. A compute system is configured to output a pressure between a surface of the optical sensor and the tissue as a function of the measured reflected illumination.

Abstract: A wearable electronic device includes a composite band, a touch-sensor display, a skin sensor, and a course of electrical conductors. The composite band forms a loop having two or more rigid segments and a flexible segment coupled between the rigid segments. The touch-sensor display is arranged in a first of the rigid segments, and a skin sensor is arranged in a second of the rigid segments. The course of electrical conductors runs between the first and second rigid segments, inside the flexible segment.

Abstract: An optical heart rate sensor includes an optical source configured to illuminate one or more blood vessels through a user's skin, an optical sensor configured to measure reflected illumination from the blood vessels, and one or more energy storage cells. A controller operates the optical source and optical sensor at a first rate of energy consumption during a first condition, and operates the optical source and optical sensor at a second rate of energy consumption during a second condition.

Abstract: A wearable computing device includes an electro-optical sensor to translate received light into an electrical signal. During a first mode of operation of the wearable computing device, a physical parameter of a wearer of the wearable computing device is assessed from the electrical signal. During a second mode of operation of the wearable computing device, encoded communication data is extracted from the electrical signal.

Abstract: Embodiments are disclosed for an antenna system comprising an over-resonant antenna conductor and a radio receiver electrically coupled to the over-resonant antenna conductor. The antenna system further comprises a capacitor electrically coupled to the over-resonant antenna conductor and sized to match the antenna conductor to a selected frequency.

Abstract: Examples are disclosed herein that are related to monitoring body hydration levels based on galvanic skin response measurements acquired by a wearable electronic device. One example provides a wearable electronic device including a sensor configured to measure a galvanic skin response, a logic device, and a storage device including instructions executable by the logic device to operate a hydration monitoring mode, acquire a plurality of measures of galvanic skin response over time, present data regarding the plurality of measures of galvanic skin response.

Abstract: Various embodiments relating to a battery isolation circuit for disconnecting a battery from a load are disclosed. In one embodiment, a battery isolation circuit includes a power switch, a protection circuit module (PCM), and a drive diverter. The power switch may be operatively intermediate a battery and a load. The PCM may be operatively connected to the power switch. The PCM may be configured to selectively drive the power switch to electrically connect the battery to the load. The drive diverter may be configured to interrupt the PCM from driving the power switch in order to electrically disconnect the battery from the load in response to activation of a user-operable switch.

Abstract: Embodiments are disclosed for a power and data connector comprising a magnet, a film adhered to a surface of the magnet, and a stage extending away from the film. The power and data connector further comprises a plurality of electrical contacts disposed on the stage, the plurality of electrical contacts having a mirrored signal pin-out.

Abstract: A wearable computing device includes an electro-optical sensor to translate received light into an electrical signal. During a first mode of operation of the wearable computing device, a physical parameter of a wearer of the wearable computing device is assessed from the electrical signal. During a second mode of operation of the wearable computing device, encoded communication data is extracted from the electrical signal.

Abstract: A method of measuring ultraviolet light includes observing an ultraviolet portion of ambient light with an ultraviolet light sensor, measuring an intensity of a visible portion of the ambient light with a visible light sensor, and estimating an intensity of the ultraviolet portion of the ambient light based on the measured intensity of the visible portion of the ambient light if the observed ultraviolet portion of the ambient light exceeds a threshold intensity.

Abstract: Embodiments are disclosed for an antenna system comprising an over-resonant antenna conductor and a radio receiver electrically coupled to the over-resonant antenna conductor. The antenna system further comprises a capacitor electrically coupled to the over-resonant antenna conductor and sized to match the antenna conductor to a selected frequency.

Abstract: An optical heart rate sensor includes an optical source configured to illuminate one or more blood vessels through a user's skin, an optical sensor configured to measure reflected illumination from the blood vessels, and one or more energy storage cells. A controller operates the optical source and optical sensor at a first rate of energy consumption during a first condition, and operates the optical source and optical sensor at a second rate of energy consumption during a second condition.

Abstract: Various embodiments relating to a battery isolation circuit for disconnecting a battery from a load are disclosed. In one embodiment, a battery isolation circuit includes a power switch, a protection circuit module (PCM), and a drive diverter. The power switch may be operatively intermediate a battery and a load. The PCM may be operatively connected to the power switch. The PCM may be configured to selectively drive the power switch to electrically connect the battery to the load. The drive diverter may be configured to interrupt the PCM from driving the power switch in order to electrically disconnect the battery from the load in response to activation of a user-operable switch.

Abstract: Examples of wearable electronic devices are disclosed. For example, one disclosed embodiment provides a wearable electronic device comprising a band and a touch display module coupled to the band. The touch display module comprises a glass display cover incorporated in a molded polymer outer shell as an insert, and the molded polymer outer shell comprises one or more curved surfaces. The touch display module also comprises a touch sensor laminated to a backside of the glass display cover, and a display laminated to a backside of the touch sensor.

Abstract: A pressure sensor comprises an optical source configured to illuminate the tissue of a user, and an optical sensor configured to measure reflected illumination from the tissue. A compute system is configured to output a pressure between a surface of the optical sensor and the tissue as a function of the measured reflected illumination.

Abstract: An optical pulse-rate sensor includes a fixture, a light emitter, a light sensor, and a light stop. The fixture has a rim configured to contact a skin surface and enclose an area of the surface. The light emitter and light sensor are each coupled to the fixture and positioned opposite the area. The light stop is coupled to the fixture and positioned between the light emitter and the light sensor to shield the light sensor from direct illumination by the light source.

Abstract: A wearable electronic device includes a composite band, a touch-sensor display, a skin sensor, and a course of electrical conductors. The composite band forms a loop having two or more rigid segments and a flexible segment coupled between the rigid segments. The touch-sensor display is arranged in a first of the rigid segments, and a skin sensor is arranged in a second of the rigid segments. The course of electrical conductors runs between the first and second rigid segments, inside the flexible segment.

Abstract: Embodiments are disclosed for a power and data connector comprising a magnet, a film adhered to a surface of the magnet, and a stage extending away from the film. The power and data connector further comprises a plurality of electrical contacts disposed on the stage, the plurality of electrical contacts having a mirrored signal pin-out.

Abstract: A method of measuring ultraviolet light includes observing an ultraviolet portion of ambient light with an ultraviolet light sensor, measuring an intensity of a visible portion of the ambient light with a visible light sensor, and estimating an intensity of the ultraviolet portion of the ambient light based on the measured intensity of the visible portion of the ambient light if the observed ultraviolet portion of the ambient light exceeds a threshold intensity.

Abstract: Techniques for implementing an integrated antenna structure are described. In at least some embodiments, the integrated antenna structure includes an antenna that is folded and/or meandered in design to enable the antenna to be incorporated into a compact area. The integrated antenna structure further includes a printed circuit board (PCB) with a ground plane to which the antenna is connected. In implementations, the antenna and the PCB can be combined to form an integrated radiating structure that can be incorporated into a device to enable the device to transmit and/or receive wireless signals.