Health monitoring systems and methods
First Claim
Patent Images
1. A device comprising:
- a light pipe having operatively associated therewith;
one or more light sources or LEDs anda non-light transmissive barrier wall providing a barrier against light propagation therethrough and disposed therein in an encircling disposition about the light sources or LEDs to disperse light for blood oxygenation monitoring; and
,one or more light sensors or photodiodes disposed outside and about the encircling disposition of the barrier wall for capturing light reflections for blood oxygenation monitoring;
the light pipe presenting a flat surface with the barrier wall; and
,circuitry for reducing errors caused by ambient light including a correlated double sampling technique;
comprising;
first and second switches and;
first and second capacitors,the first capacitor being in series with the light sensor, and the second capacitor being in parallel with the output, and the first and second switches being disposed between the output and ground to alternatively output or shunt to ground;
the first and second switches being configured to remove ambient light signal by;
first, the noise signal being measured, by;
the light sources turned off, first switch is closed, and second switch is open;
the charge proportional to the noise signal accumulating on the first capacitor;
then the first switch is opened, the voltage on the first capacitor at this point is equal to the noise signal voltage; and
,then the light signal is measured;
the light source is turned on, the second switch closed, and charge is allowed to flow through the first and second capacitors in series.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods and devices for reducing noise in health monitoring including monitoring systems, methods and/or devices receiving a health signal and/or having at least one electrode and/or sensor for health monitoring.
311 Citations
20 Claims
-
1. A device comprising:
-
a light pipe having operatively associated therewith; one or more light sources or LEDs and a non-light transmissive barrier wall providing a barrier against light propagation therethrough and disposed therein in an encircling disposition about the light sources or LEDs to disperse light for blood oxygenation monitoring; and
,one or more light sensors or photodiodes disposed outside and about the encircling disposition of the barrier wall for capturing light reflections for blood oxygenation monitoring; the light pipe presenting a flat surface with the barrier wall; and
,circuitry for reducing errors caused by ambient light including a correlated double sampling technique;
comprising;first and second switches and; first and second capacitors, the first capacitor being in series with the light sensor, and the second capacitor being in parallel with the output, and the first and second switches being disposed between the output and ground to alternatively output or shunt to ground; the first and second switches being configured to remove ambient light signal by; first, the noise signal being measured, by; the light sources turned off, first switch is closed, and second switch is open;
the charge proportional to the noise signal accumulating on the first capacitor;then the first switch is opened, the voltage on the first capacitor at this point is equal to the noise signal voltage; and
,then the light signal is measured;
the light source is turned on, the second switch closed, and charge is allowed to flow through the first and second capacitors in series. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A device for oxygenation determination, the device having:
-
a substrate and disposed thereon; a light pipe having disposed therein all on the substrate; one or more centrally disposed light sources or LEDs; and
,one or more sensors or photodiodes; the one or more light sources or LEDs being centrally disposed relative to the one or more sensors or photodiodes to sense reflected light emitted from the light sources; and
,the one or more sensors or photodiodes being peripherally disposed in the same plane on the substrate relative to the light sources or LEDs; the light pipe presenting a flat surface with the sources and sensors; and
,circuitry for reducing errors caused by ambient light including a correlated double sampling technique;
comprising;first and second switches and; first and second capacitors, wherein the first capacitor is in series with the light sensor, and the second capacitor is in parallel with the output, and the first and second switches are disposed between the output and ground to alternatively output or shunt to ground; the first and second switches being configured to remove ambient light signal by; first, the noise signal being measured, by; the light sources turned off, first switch is closed, and second switch is open;
the charge proportional to the noise signal accumulating on the first capacitor;then the first switch is opened, the voltage on the first capacitor at this point is equal to the noise signal voltage; and
,then the light signal is measured;
the light source is turned on, the second switch closed, and charge is allowed to flow through the first and second capacitors in series.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
the device also comprising; a conductive sensor connected to the substrate, and the one or more light sources or LEDs being for one or more wavelengths.
-
-
20. A device according to claim 11,
the device being adapted to be adhered to the skin of a subject; -
the device also comprising; a conductive sensor connected to the substrate, and the one or more light sources or LEDs being for one or more wavelengths; and
,a barrier wall disposed between the one or more light sensors and the one or more light sources or LEDs.
-
Specification