A computer-implemented method for contact photoplethysmography, abbreviated contact PPG, comprises obtaining during a time interval plural PPG signals for sub-regions of a lens or video frame; and combining the plural PPG signals to thereby obtain a multi-region PPG signal.

Methods and apparatuses for heart rate detection are described. In one example, a headphones apparatus and method includes emitting a first light in a first light direction directed at a left ear location from a left ear light emitter, and detecting a detected first light at a left ear light detector following interaction of the first light with a left ear tissue. The method includes emitting a second light in a second light direction directed at a right ear location from a right ear light emitter, the right ear location different from the left ear location. The method further includes detecting a detected second light at a right ear light detector following interaction of the second light with a right ear tissue, and estimating a heart rate from the detected first light and the detected second light.

An electronic device is provided. The electronic device includes a lighting-emitting diode (LED) module configured to emit light of a first polarization direction, a first photodiode configured to receive the light emitted from the LED module through a first polarizer having the first polarization direction, a second photodiode configured to receive the light emitted from the LED module through a second polarizer having a second polarization direction perpendicular to the first polarization direction, and a processor configured to determine wearing information of the electronic device based on luminous intensity of light sensed from each of the first photodiode and the second photodiode.

There is provided a physiological detection device including a light source, a light detector, a processing unit and a display device. The light source emits light to illuminate a skin surface. The light detector receives the light from the skin surface to output detected signals. The processing unit confirms an attached state according to the detected signals and controls the display device to show an indication signal or a warning message when the attached state is confirmed not good.

A watch having a cover is described. An optical sensor subsystem is attached adjacent to or directly on an interior surface of the cover. In some cases, the optical sensor subsystem includes a substrate to which a light emitter and a light receiver are attached. The light receiver is configured to receive light emitted by the light emitter and reflected from the skin of a person that wears the watch. In some cases, the light emitter and light receiver are separated by a light-blocking wall that abuts the interior surface of the cover. In some cases, a light filter is attached adjacent or directly on the interior surface of the cover, between the cover and the light receiver.

Various embodiments of a die carrier package and a method of forming such package are disclosed. The package includes one or more dies disposed within a cavity of a carrier substrate, where a first die contact of one or more of the dies is electrically connected to a first die pad disposed on a recessed surface of the cavity, and a second die contact of one or more of the dies is electrically connected to a second die pad also disposed on the recessed surface. The first and second die pads are electrically connected to first and second package contacts respectively. The first and second package contacts are disposed on a first major surface of the carrier substrate adjacent the cavity.

A device, a substrate including a connection port. The substrate includes traces to enable a circuit of the substrate. The circuit is connected to the connection port. A light sensor mechanically and electrically attached respectfully to a first planar surface of the substrate and the circuit. A light source is mechanically and electrically attached respectively to the first planar surface and the circuit. The light source is located lateral to the light sensor at a first distance. A light signal of the light source emanates from the light source at an angle perpendicular to the first planar surface and a reflector mechanically attached to the first planar surface and located between the light sensor and the light source. The light signal is substantially reflected by the reflector away from the light sensor.

The present disclosure relates to noninvasive methods, devices, and systems for measuring various blood constituents or analytes, such as glucose. In an embodiment, a light source comprises LEDs and super-luminescent LEDs. The light source emits light at at least wavelengths of about 1610 nm, about 1640 nm, and about 1665 nm. In an embodiment, the detector comprises a plurality of photodetectors arranged in a special geometry comprising one of a substantially linear substantially equal spaced geometry, a substantially linear substantially non-equal spaced geometry, and a substantially grid geometry.

A method of dialysis is provided that includes sensing the concentration of potassium in a patient's blood serum, in used dialysate resulting from treating the patient, or in both. The method involves generating a sensed value of the concentration of potassium, comparing the sensed value with one or more values stored in a memory, and generating a control signal based on the comparison. Supplemental potassium solution is infused into the treatment dialysate, based on the control signal. The comparison can be made to patient-historical data, population data, or both.

A consumer product that is a portable and, in some cases, a wearable electronic device. The wearable electronic device may have functionalities including: keeping time; monitoring a user's physiological signals and providing health-related information based on those signals; communicating with other electronic devices or services; visually depicting data on a display; gather data form one or more sensors that may be used to initiate, control, or modify operations of the device; determine a location of a touch on a surface of the device and/or an amount of force exerted on the device, and use either or both as input.