Koninklijke Philips Corporation N.v.

Asml Netherlands B.v.

Cristian Nicolae Presura

Ronaldus Maria Aarts

David Antoine Christian Marie Roovers

Carsten Heinks

Ruxandra Valentina Bobiti

Marcel F Schemmann

Steven Charles Deane

Gary Nelson Garcia Molina

Johannes Hendrikus Maria Spruit

Rick Bezemer

Coen Theodorus Hubertus Fransiscus Liedenbaum

Olaf Thomas Johan Antonie Vermeulen

Jan Evert Van Der Werf

Antonius Hermanus Maria Akkermans

Olaf Such

Eibert Gerjan Van Putten

Willem Verkruijsse

Sander Theodoor Pastoor

Elvira Johanna Maria Paulussen

Alphonsus Tarcisius Jozef Maria Schipper

Stefan Pfundtner

Edgar Martinus Van Gool

Calina Ciuhu

Antonius Johannes Joseph Wismans

Adrianus Petrus Johanna Maria Rommers

Ronald Jan Asjes

Gerardus Franciscus Cornelis Maria Lijten

Simone Cornelia Maria Anna Ordelman

Antonius Hermanus Maria Blom

Maarten Van Herpen

Koen Geenen

Gary Garcia Molina

Atanas Pentchev

Henricus Antonius Verspaget

Gert Hooft

Michel Jacobi

Pieter Geert Van Engen

Andrei Nicolae

Antonius H M Blom

Marcel C Schemmann

Adrianus P J M Rommers

Henricus A Verspaget

Gary N Garcia Molina

A method () for detecting one or more caries using an imaging device (), the method including the steps of: (i) directing () light from a first light source () toward a tooth (); (ii) measuring (), with an optical sensor (), transmission of light from the first light source through the tooth; (iii) directing () light from a second light source () toward the tooth, wherein the second light source directs light at the tooth at a different angle relative to the first light source; (iv) measuring (), with the optical sensor, reflectance from the tooth of light from the second light source; (v) comparing () the measured transmission to the measured reflectance; and (vi) determining (), based at least in part on said comparison, whether a caries is present in the tooth.

Method and apparatus for early caries detection

The present invention relates to a device (), system () and method () for use in blood oxygen saturation measurement of a subject. To enable blood oxygen saturation measurements with improved reliability, a processing device () is presented comprising an input () for receiving first and second detection data of a tissue region of the subject, said first detection data being data acquired over time by detecting radiation at a first wavelength (&#x3bb;) and at a second wavelength (&#x3bb;) received from said tissue region; said second detection data being data acquired over time by detecting radiation at the first wavelength and at the second wavelength received from said tissue region in response to coherent light at the first wavelength and coherent light at the second wavelength being emitted towards the tissue region; a PPG unit () for deriving, from said first detection data, a first PPG signal indicative of an absorption of light within the tissue region at the first wavelength, and a second PPG signal indicative of an absorption of light within the tissue region at the second wavelength; a flow unit () for deriving, from said second detection data, a first flow signal indicative of a flow of light scattering particles within the tissue region probed at the first wavelength, and a second flow signal indicative of a flow of light scattering particles within the tissue region probed at the second wavelength; and a processing unit () for correcting said PPG signals based on said flow signals and/or for providing a feedback signal based on a comparison of the first and second flow signals.

Device for use in blood oxygen saturation measurement

The invention relates to a physiological property determination apparatus () for determining a physiological property like a pulse rate of a person. The apparatus may be configured to be worn on the wrist like a watch. A controller () separately controls at least two light sources () for emitting at least two light beams having different wavelengths into tissue of the person and a light detector () having a two-dimensional detection surface () detects light, which has travelled through the tissue, wavelength-dependently and generates a wavelength-dependent two-dimensional image based on the detected light. Based on the generated wavelength-dependent two-dimensional image the physiological property is determined. The separate control of the light sources allows for an independent optimization of the illumination and detection processes for each wavelength, which in turn can lead to an improved determination of the physiological property based on the wavelength-dependent two-dimensional image.

Physiological property determination apparatus

A device for measuring a physiological parameter of a user carrying the device that includes a sensor having at least two sensor elements for detecting a sensor signal, a carrier configured to carry the sensor, and electrical contacts of the sensor elements that lead on, into or through the carrier. One or more frames carried by the carrier are formed around the sensor and/or the individual sensor elements, and an insulator material is filled between the one or more frames and the sensor and/or the sensor elements surrounded by a respective frame without covering a top surface of a respective sensor element facing away from the carrier.

Device for measuring a physiological parameter of a user

The present invention relates to a portable device for determining a heart rate of a person, said portable device comprising:

Device and method for estimating the heart rate during motion

The invention relates to a photoplethysmography (PPG) apparatus (), comprising at least one light source () configured to generate a beam of source light () having a source beam angle () and at least one controllable beam angle adapter () configured to receive a beam-angle control signal () indicative of a modified beam angle () to be set, the beam angle adapter () being further configured to provide the beam of source light () with a modified beam angle () to an external object (). The PPG apparatus () comprises at least one PPG sensor()configured to provide a sensor signal () indicative of source light () scattered by the external object (), and a PPG evaluation and control unit () configured to receive the sensor signal (), to provide the beam-angle control signal () and to provide at its output () an AC signal component of the sensor signal ().

Photoplethysmography apparatus

The present embodiment relates to a method and apparatus for measuring a tissue variation signal (e.g. a photoplethysmographic (PPG) signal) without large direct current (DC) or low frequency (LF) offset which normally limit the sensor accuracy through motion artefacts and/or dynamic range requirements. The proposed solution is based on a separation of the PPG signal from the disturbance. This can be achieved by creation of a modulated PPG signal, or by creation of a differential PPG signal and an optimized sensor configuration which is adapted to remove DC or LF components.

Method and apparatus for optical sensing of tissue variation at increased accuracy

A heart rate monitor system having at least one primary heart rate sensor () for measuring or determining a heart rate of a user and for outputting an output signal (HR) is provided. The output signal (HR) is based at least on measured heart beats and/or artifacts. The heart rate monitor system also comprises a model unit () for estimating or predicting a heart rate (HRM) of a user based on a model stored in the model unit () and the information received from at least one secondary sensor () measuring at least one physiological factor influencing heart rate of a user. The heart rate monitor system furthermore comprises a processing unit () for correlating the output signal (HR) received from the primary sensor () with the estimated or predicted hear rate (HRM) received from the model unit () to differentiate the measured heart beats from the artifacts.

Heart rate monitor system

PPG sensor emits light at at least three wavelengths (Y-Y) and detects the reflected light. The PPG sensor comprises a motion correction unit () for correcting motion artefacts from the detected light signals by subtracting the output signal of the detected light at the second wavelength (Y) from an average of an output signal of the detected light at the first and third wavelength (Y, Y). The three wavelengths (Y-Y) are arranged around 550 nm. The second wavelength (Y) is arranged equal distantly between the first and third wavelength.

Vital signs sensor and method of measuring vital signs of a user

The present disclosure pertains to a system and method for managing a sleep session of a subject. Managing the sleep session is based on cardiac activity in the subject during the sleep session. Cardiac activity, as monitored via one or more sensors worn on an extremity of the subject and/or placed at a distance from the subject, is used to determine periods of slow wave sleep. Sensory stimulation is delivered to the subject during the periods of slow wave sleep to enhance slow wave activity. Wearing a sensor on an extremity, and/or placing a sensor at a distance from the subject during sleep, as opposed to the subject wearing an EEG cap, is more comfortable for the subject.

System and method for enhancing sleep slow wave activity based on cardiac activity

A heart rate monitor system () for monitoring a heart rate of a user is provided. The heart rate monitor system () comprises at least one primary heart rate sensor () for measuring or determining a heart rate of a user. The at least one primary heart rate sensor () has a first power consumption. The heart rate monitor system () also comprises at least one secondary sensor () for measuring at least one physiological factor influencing the heart rate of a user. The at least one secondary sensor () has a second power consumption which is lower than the first power consumption of the at least one primary heart rate sensor (). The heart rate monitor system () further comprises a power management unit () for managing an operation and/or power consumption of the at least one primary heart rate sensor () based on information () from the at least one secondary sensor (). The heart rate monitor system comprises a model unit for estimating a heart rate of a user based on a model stored in the model unit and information received from the at least one secondary sensor. The model unit is coupled to the power management unit via a feedback loop such that the power management unit is adapted to compare the estimated heart rate with the measured heart rate and to control the operation of the primary sensor in dependence on the comparison.

Heart rate monitor device

The invention relates to movement detection apparatus () for detecting a hand movement like a hand gesture which may be used for controlling a computer or another device. A light emitting device emits light into tissue at the wrist () of a person and a light detection device detects light, which has travelled through the tissue, at the wrist and generates a light detection signal based on the detected light, wherein a hand movement determination unit determines the hand movement based on the light detection signal. When the hand moves, i.e., for instance, when it rotates or when a finger moves, the composition of the tissue, through which the light travels, and hence the light detection signal change. This change in the light detection signal can be used to reliably determine the respective movement of the hand in a way which is very convenient for the person.

Movement detection apparatus for detecting a hand movement

Wearable computing device

The present invention relates to a portable device () for determining a heart rate of a person (), comprising a heart rate measurement unit, a motion measurement unit for measuring the motion of a body part (), and a processing unit. The processing unit is adapted to measure a signal quality of the heart rate signal and accordingly switch between two calculation modes: If the signal quality is above a predefined threshold, the heart rate is calculated based on the heart rate signal. If the signal quality is so poor that a reliable calculation of the heart rate is technically not possible anymore based on the heart rate signal, the processing unit switches to its second calculation mode, in which the heart rate is estimated based on the motion signal by estimating a heart rate constant, which depends on the frequency of the motion signal, and defining an exponential development of the heart rate, starting at the last reliably measured heart rate and finishing at the estimated heart rate constant.

The invention relates to an optical device for measuring a heart rate of a user. Said optical device comprises: &#x2014;two light sources () for emitting light into the skin of the user, &#x2014;a sensor () for sensing the light signals emitted by each of the two light sources and reflected through the skin of the user so as to determine the heart rate of the user. The two light sources () are situated at different distances from the sensor such that the light signals received from each of the two light sources have a different penetration depth into the skin.

Optical device for measuring a heart rate of a user

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Veldhoven, Netherlands

Cristian Nicolae Presura