Heart rate detection device and operating method thereof, physiological detection device
AssigneePixart Imaging Inc.
InventorsRen-Hau GU, Chih-Hsin LIN
Life of this patent
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Abstract
There is provided a heart rate detection device including a sensing unit for sensing emergent light from subcutaneous tissues illuminated by a single light source of multiple light colors to output multiple light detection signals associated with multiple wavelengths. The heart rate detection device further includes a processor uses the multiple light detection signals associated with the multiple wavelengths to cancel motion artifact to obtain a clean heart rate signal.
Claims20
A heart rate detection device, comprising:
- at least one light source each configured to emit light covering multiple wavelengths to illuminate a skin surface of a user;
- a light detector comprising a sensing unit configured to sense emergent light from the skin surface and output multiple light detection signals associated with different light colors corresponding to the multiple wavelengths;
- and
- a processor configured to perform a vector calculation between the multiple light detection signals and a pre-stored intensity distribution of the different light colors to remove a motion artifact.
An operating method of a heart rate detection device, the heart rate detection device comprising a light source of multiple wavelengths, a light detector and a processor, the operating method comprising:
- entering a register mode, the register mode comprising:
- illuminating, by the light source, a first skin surface of a user;
- sensing, by the light detector, emergent light from the first skin surface to generate multiple first light detection signals associated with different light colors;
- and
- calculating and storing, by the processor, registered data of a plurality of sections of sample data associated with the different light colors;
- and
- entering a working mode, the working mode comprising:
- illuminating, by the light source, a second skin surface of a user;
- sensing, by the light detector, emergent light from the second skin surface to generate multiple second light detection signals associated with the different light colors;
- and
- performing, by the processor, a vector calculation between every section of sample data of the multiple second light detection signals and the registered data to remove a motion artifact.
A physiological detection device, comprising:
- a white light source configured to emit white light having a color temperature between 2800K and 3200K;
- a molding formed upon the white light source and configured to constrain an emission angle of the white light between 60 and 80 degrees;
- and
- a pixel array covered by a filter layer having a passband between 570 nm and 610 nm configured to filter the white light.
Dependencies are inferred from the claim text.