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    Heart rate detection architecture
    2.
    发明授权
    Heart rate detection architecture 有权

    公开(公告)号：US11369316B2

    公开(公告)日：2022-06-28

    申请号：US16595006

    申请日：2019-10-07

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Hau Gu ,  Yen-Min Chang ,  Ming-Chang Li ,  Chih-Hsin Lin

    IPC: A61B5/00 ,  A61B5/024 ,  G16H50/30 ,  G16H40/63

    Abstract: There is provided a system architecture including a PPG hardware module and a MEMS hardware module. The PPG hardware module processes PPG raw data, which is generally composed of analog signals or digital signals. The PPG hardware module filters the raw data for later digital calculation to, for example, find out frequency signals with higher peak values. The PPG hardware module then outputs the selected frequency signals to an MCU for heart rate calculation. The MEMS hardware module receives MEMS raw data from a motion detector made of MEMS elements. The MEMS raw data represents motion status of a user that could possibly affect the heart rate determination result. The MEMS hardware module filters the raw data for later digital calculation to find out frequency signals with higher peak values caused by motion.

    Electronic device capable of detecting wearing state or touching state
    4.
    发明授权
    Electronic device capable of detecting wearing state or touching state 有权

    公开(公告)号：US11016535B1

    公开(公告)日：2021-05-25

    申请号：US16748746

    申请日：2020-01-21

    Applicant: PixArt Imaging Inc.

    Inventor： Ming-Hung Tsai ,  Tse-Chung Su ,  Ren-Hau Gu ,  Tzung-Min Su

    IPC: G06F1/16 ,  G06F3/041 ,  G06F3/044

    Abstract: A wearable electronic device which can detect a wearing state, comprising: at least one first electrode, provided in a first region of the wearable electronic device; at least one second electrode, provided in a second region of the wearable electronic device; a capacitance calculating circuit, configured to calculate first capacitances generated by the first electrode and configured to calculate second capacitances generated by the second electrode, wherein the capacitance calculating circuit further calculates a capacitance difference between the first capacitance and the second capacitance; and a processing circuit, configured to determine the wearing state according to the capacitance difference. Via such structure, a wearing state, a wearing location, a wearing angle of the electronic device can be automatically detected, thus the problem caused by an improper wearing manner can be improved.

    Physiological detection device
    5.
    发明授权
    Physiological detection device 有权

    公开(公告)号：US10905340B2

    公开(公告)日：2021-02-02

    申请号：US16700168

    申请日：2019-12-02

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Hau Gu ,  Hsin-Chia Chen ,  Raman Sahgal ,  Jung-Tai Lin

    IPC: A61B5/024 ,  A61B5/11 ,  G01C11/02 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/03 ,  G06F1/3234 ,  G06F3/01

    Abstract: A physiological detection device including a light source, an image sensor and a processor is provided. The light source illuminates a skin surface using a burst mode. The image sensor receives ejected light from skin tissues under the skin surface at a sampling frequency to successively generate image frames. The processor controls the light source and the image sensor, and calculates a physiological characteristic according to the image frames captured when the light source is illuminating light. The physiological detection device reduces the total power consumption by adopting the burst mode.

    Physiological detection device and operating method thereof
    6.
    发明授权
    Physiological detection device and operating method thereof 有权

    公开(公告)号：US10548490B2

    公开(公告)日：2020-02-04

    申请号：US15231690

    申请日：2016-08-08

    Applicant: PIXART IMAGING INC.

    Inventor： Ren-Hau Gu ,  Hsin-Chia Chen ,  Raman Sahgal ,  Jung-Tai Lin

    IPC: A61B5/024 ,  A61B5/11 ,  G01C11/02 ,  G06F3/0354

    Abstract: A physiological detection device including a light source, an image sensor and a processor is provided. The light source illuminates a skin surface using a burst mode. The image sensor receives ejected light from skin tissues under the skin surface at a sampling frequency to successively generate image frames. The processor controls the light source and the image sensor, and calculates a physiological characteristic according to the image frames captured when the light source is illuminating light. The physiological detection device reduces the total power consumption by adopting the burst mode.

    ELECTRONIC APPARATUS AND METHOD CAPABLE OF REDUCING OR AVOIDING OFFSET INTERFERENCE AND ACCURATELY MEASURING PHYSIOLOGICAL CHARACTERISTICS OF USER
    7.
    发明申请
    ELECTRONIC APPARATUS AND METHOD CAPABLE OF REDUCING OR AVOIDING OFFSET INTERFERENCE AND ACCURATELY MEASURING PHYSIOLOGICAL CHARACTERISTICS OF USER 审中-公开

    公开(公告)号：US20180296106A1

    公开(公告)日：2018-10-18

    申请号：US15785416

    申请日：2017-10-16

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Hau Gu

    IPC: A61B5/024 ,  A61B5/00

    Abstract: A method for measuring physiologically characteristics of user includes: using at least one light emitting unit to emit light ray including first light component corresponding to first wavelength and second light component corresponding to second wavelength different from the first wavelength; using an image sensing circuit to sense and generate at least one physiologically characteristics measurement signal in response to the light ray; performing an offset calibration operation upon the physiologically characteristics measurement signal to generate at least one calibrated measurement signal; and, calculating the calibrated measurement signal to estimate a physiologically characteristics result.

    OPTICAL NAVIGATION MECHANISM CAPABLE OF DYNAMICALLY LEARNING DIFFERENT MATERIALS OF DIFFERENT WORKING SURFACES
    8.
    发明申请
    OPTICAL NAVIGATION MECHANISM CAPABLE OF DYNAMICALLY LEARNING DIFFERENT MATERIALS OF DIFFERENT WORKING SURFACES 审中-公开

    公开(公告)号：US20180232065A1

    公开(公告)日：2018-08-16

    申请号：US15673420

    申请日：2017-08-10

    Applicant: PixArt Imaging Inc.

    Inventor： Ren-Hau Gu

    IPC: G06F3/03 ,  G06F3/0354

    CPC classification number: G06F3/0317 ,  G06F3/0308 ,  G06F3/03543

    Abstract: A method for dynamically learning a material of a working surface on which an optical navigation device is moving, includes: using light emitting unit (s) to emit light ray (s) to the surface so as to generate image(s) on an image sensor; estimating and calculating average offset(s) of image(s) of sensing pixel(s) of the image sensor according to at least one image motion information sensed by the sensing pixel(s) during a specific time; and, dynamically determining whether the image value(s) sensed by the sensing pixel (s) correspond to a fixed pattern or correspond to a feature image of the device moving on the surface according to the average offset(s) and a threshold.

    Heart rate detection module, and detection and denoising method thereof
    10.
    发明授权
    Heart rate detection module, and detection and denoising method thereof 有权

    公开(公告)号：US09974487B2

    公开(公告)日：2018-05-22

    申请号：US14731711

    申请日：2015-06-05

    Applicant: PixArt Imaging Inc.

    Inventor： Chih-Hsin Lin ,  Ren-Hau Gu

    IPC: A61B5/02 ,  A61B5/00 ,  A61B5/024

    CPC classification number: A61B5/721 ,  A61B5/02416 ,  A61B5/02438 ,  A61B5/725 ,  A61B5/7257

    Abstract: A heart rate detection module including a PPG measuring device, a motion sensor and a processing unit is provided. The PPG measuring device is configured to detect a skin surface in a detection period to output a PPG signal. The motion sensor is configured to output an acceleration signal corresponding to the detection period. The processing unit is configured to respectively convert the PPG signal and the acceleration signal to first frequency domain information and second frequency domain information, determine a denoising parameter according to a maximum spectrum peak value of the second frequency domain information to denoise the first frequency domain information, and calculate a heart rate according to a maximum spectrum peak value of the denoised first frequency domain information.

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