PHYSIOLOGICAL MONITORING SYSTEM FOR MEASURING OXYGEN SATURATION

    公开(公告)号:US20240389901A1

    公开(公告)日:2024-11-28

    申请号:US18792337

    申请日:2024-08-01

    Applicant: Apple Inc.

    Abstract: A wearable device is described. The wearable device includes a housing having a back cover, and an optical mask on first portions of the back cover. The back cover includes a set of windows, with a first subset of windows in the set of windows being defined by an absence of the optical mask on second portions of the back cover, and a second subset of windows in the set of windows being inset in a set of openings in the back cover. An optical barrier surrounds each window in the second subset of windows. A set of light emitters is configured to emit light through at least some of the windows in the set of windows. A set of light detectors is configured to receive light through at least some of the windows in the set of windows.

    System and method for robust pulse oximetry using asymmetric distance-dependent calibration

    公开(公告)号:US11771350B1

    公开(公告)日:2023-10-03

    申请号:US17018739

    申请日:2020-09-11

    Applicant: Apple Inc.

    Abstract: Estimation of a characteristic of a user's physiological signals can be improved using one or more calibration relationships that may be dependent on a characteristic of the optical sensor. For example, different calibration relationships can be used that are dependent on a spatial characteristic and/or that are dependent on a wavelength characteristic of the light emitting component(s) of the respective emitter of a channel. In some examples, a unique calibration relationship can be used for each channel. In some examples, a common calibration relationship can be used for multiple channels with shared distance and/or wavelength characteristics. Utilizing distance-dependent and/or wavelength-dependent calibration relationships can improve robustness of pulse oximetry measurements.

    System and method for robust pulse oximetry

    公开(公告)号:US11331016B1

    公开(公告)日:2022-05-17

    申请号:US16583211

    申请日:2019-09-25

    Applicant: Apple Inc.

    Abstract: Robust estimation of a characteristic of a user's physiological signals can be achieved by filtering or classifying samples. Rather than estimating the characteristic of the user's physiological signals based on each sample at a first wavelength and a second wavelength, a robust system and method can, in some examples, estimate the characteristic using samples at the first wavelength and the second wavelength that meet one or more criteria and filter out samples that fail to meet the one or more criteria. In some examples, the system and method can weight samples based on the one or more criteria, and estimate the characteristic using the weighted samples. Samples failing to meet the one or more criteria can be given less weight or no weight in the estimation. The one or more criteria can include a criterion based on at least the physiological signal at a third wavelength.

    Physiological Monitoring System for Measuring Oxygen Saturation

    公开(公告)号:US20210093237A1

    公开(公告)日:2021-04-01

    申请号:US17018850

    申请日:2020-09-11

    Applicant: Apple Inc.

    Abstract: A wearable device is described. The wearable device includes a housing having a back cover, and an optical mask on first portions of the back cover. The back cover includes a set of windows, with a first subset of windows in the set of windows being defined by an absence of the optical mask on second portions of the back cover, and a second subset of windows in the set of windows being inset in a set of openings in the back cover. An optical barrier surrounds each window in the second subset of windows. A set of light emitters is configured to emit light through at least some of the windows in the set of windows. A set of light detectors is configured to receive light through at least some of the windows in the set of windows.

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