Physiological detection device capable of detecting attached state
AssigneePixart Imaging Inc.
InventorsMing-Chang LI, Ren-Hau GU
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Abstract
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.
Claims20
A physiological detection device, comprising:
- a sensor array comprising multiple pixels divided into a first pixel region and a second pixel region respectively configured to receive light from a skin to output first pixel data and second pixel data;
- a polarizing layer covered upon the sensor array and comprising a first region and a second region, the first region having a first polarization direction and opposite to the first pixel region, and the second region having a second polarization direction perpendicular to the first polarization direction and opposite to the second pixel region;
- and
- a processing unit, electrically connected to the sensor array, and configured to
- generate a first detected signal according to the first pixel data,
- generate a second detected signal according to the second pixel data,
- compare the first detected signal with the second detected signal to determine an attached state of the physiological detection device with respect to the skin.
A physiological detection device, comprising:
- a light source configured to emit light to illuminate a skin;
- a sensor array configured to receive the light from the skin to output an image frame;
- and
- a processing unit, electrically connected to the light source and the sensor array, and configured to determine an attached state according to a brightness distribution of the image frame.
A physiological detection device, comprising:
- a first light source configured to emit light of a first wavelength to illuminate a skin;
- a single photon avalanche diode (SPAD) configured to receive the light from the skin to output an electrical pulse signal;
- and
- a processing unit, electrically connected to the first light source and the SPAD, and configured to calculate a first time-of-flight according to the electrical pulse signal from the SPAD and determine an attached state by comparing the first time-of-flight with a first time threshold.
Dependencies are inferred from the claim text.