Samsung Electronics Co., Ltd.

Gil-Won Yoon

Kye-jin Jeon

Jong-youn Lee

In-duk Hwang

Hong-sig Kim

Hyung-sok Yeo

Yus Ko

Dong-Jin Keum

Min-Ho Choi

Sang-Joon Han

Jeong-whan Lee

Su-Jin Kim

Sang-Hoon Shin

Tae-Woo Kim

Sang-kon Bae

Kun-kook Park

Sung-Woo Moon

Gwang-Yol Noh

Jeong-Whan Lee

Hyun-tai Hwang

Hoon-jong Jwa

Sang-Kon Bae

Jong-Youn Lee

Hong-Sig 202-1103 Cheongsol Maeul Kim

Hyung-Sok 583-903 Baekseol Maeul Kolon Apt Yeo

A method of operating a buck-boost converter including an inductor and a capacitor includes; operating the buck-boost converter in boost mode until a level of an input voltage applied at an input node of the buck-boost converter reaches a desired level of an output voltage apparent at an output node of the buck-boost converter, and after the level of an input voltage reaches the desired level of the output voltage, operating the buck-boost converter in buck mode, wherein operating the buck-boost converter in buck mode and operating the buck-boost converter in boost mode overlap at least in part temporally proximate a point at which the level of the input voltage exceeds the level of the output voltage.

Buck-boost converter and operating method

A switching regulator includes a power converting unit and a switch driving unit. The power converting unit is configured to generate a direct current (DC) output voltage based on a switch driving signal and a DC input voltage. The switch driving unit is configured to generate a ripple voltage having information of an inductor current flowing through the power converting unit, add the ripple voltage to a reference voltage to generate a first voltage having a ripple, generate a feedback voltage based on the DC output voltage, compare the first voltage with the feedback voltage in a hysteresis mode to generate a comparison output, and generate the switch driving signal based on the comparison output.

Hysteretic switching regulator including a power converting unit and a switch driving unit

A method of removing abnormal data in a blood component analysis system using spectroscopy to estimate a concentration of a blood component by analyzing a photo-plethysmographic (PPG) signal obtained by radiating light of first and second wavelengths reacting to the blood component on a subject and detecting light corresponding to the first and second wavelengths output from the subject, includes collecting the PPG signal corresponding to the first and second wavelengths for a predetermined unit period of time, calculating 'n' parameters, with respect to 'n' pulse data included in the collected PPG signal, where n is a positive integer, calculating an average of the &#x201c;n&#x201d; parameters, and comparing a ratio of a number of parameters whose deviation from the average is greater than a predetermined standard deviation to the &#x201c;n&#x201d; parameters with a predetermined removal reference value to determine whether the &#x201c;n&#x201d; pulse data is valid.

Method of removing abnormal data and blood component spectroscopy analysis system employing the same

A health monitoring method using a tongue image including constructing a database in which a tongue image obtained from a person, a template image set for the person, and a result of determining a health condition of the person with respect to at least one characteristic factor are linked together; isolating a region of interest within the tongue image, which is acquired from a person whose health condition is to be determined, using template matching; detecting at least one characteristic factor from the isolated region of interest; and determining a health condition of the person based on a change in an appearance of the tongue, which is detected by a comparison between the detected characteristic factor and a characteristic factor searched from the database with respect to the region of interest in different health conditions.

Method of digital image analysis for isolating a region of interest within a tongue image and health monitoring method and apparatus using the tongue image

A method of evaluating human stress using photoplethysmography (PPG) includes defining at least one PPG parameter, radiating light having at least one wavelength, which reacts to a blood component to be measured, at a measuring target and measuring a PPG signal from the measuring target during a predetermined period of time, and evaluating a level of human stress using a plurality of stress indexes obtained from the PPG parameter.

Method and apparatus for evaluating human stress using photoplethysmography

A probe for use in photoplethysmographic (PPG) measurement includes a light source unit including a light source that contacts a predetermined site of an object and emits light onto the predetermined site, a photodetector unit positioned facing the light source unit to receive the light emitted from the light source unit and transmitted through the object, a body having a space for receiving the object and in which the light source unit and the photodetector unit are positioned in a same optical axis, and a pressure application unit coupled to the body for applying a pressure to the object via the light source unit. A biological signal measuring system includes the above probe, a controller for controlling operations of the probe and for recording and analyzing signals output from the probe, a detected light intensity display unit for displaying an intensity of detected light, and a biological signal display unit.

Probe for use in measuring a biological signal and biological signal measuring system incorporating the probe

In an apparatus and method of noninvasively measuring a concentration of a blood component, the method includes (a) varying a thickness of a body part of a subject, measuring absorption spectrums at different thicknesses of the body part, obtaining a first differential absorption spectrum between the absorption spectrums measured at different thicknesses, actually measuring concentrations of the blood component, and establishing a statistical model using the first differential absorption spectrum and the actually measured concentrations; and (b) estimating the concentration of the blood component using a second differential absorption spectrum obtained with respect to the body part based on the statistical model.

Method and apparatus for noninvasively measuring a concentration of a blood component

An apparatus for measuring a bio signal including a bio signal measurement unit, which is insertable into an ear to be in close contact with an internal surface of the ear, the bio signal measurement unit having a photo plethysmography (PPG) measurement module for radiating light of different wavelengths onto the internal surface of the ear, detecting light transmitted through the ear, and outputting a PPG signal including bio information, a control unit having a PPG signal processor for generating the bio information using the PPG signal measured by the PPG measurement module, and an output unit for displaying the bio information generated from the control unit.

Ear type apparatus for measuring a bio signal and measuring method therefor

An apparatus for diagnosing sleep apnea, which detects a temporary cessation of breathing during sleep by applying light to a part of a subject's body and processing light output therefrom, includes a light source unit for sequentially generating light of at least two different wavelengths according to a control signal, a photodetecting unit for detecting the light, which are generated by the light source unit and applied to the body part, and for converting the detected light signals into electric signals, a diagnosis unit for substantially removing a time delay between the electric signals output from the photodetecting unit, for calculating a ratio between the electric signals, and for comparing the ratio with a predetermined reference value to diagnose sleep apnea, and a controller for outputting the control signal to the light source unit to generate the light signals, and for providing the predetermined reference value to the diagnosis unit.

Apparatus and method for diagnosing sleep apnea

A method of measuring a concentration of a component in a subject includes setting an intensity relationship equation between a positive-order beam and a negative-order beam with respect to a reference matter at a particular wavelength, applying a light having a first wavelength band absorbed by the component and detecting an intensity of a positive-order beam output from the subject and an intensity of a negative-order beam output from the reference matter, the positive-order beam and the negative-order beam having a second wavelength band, calculating an intensity of a positive-order beam input to the subject by applying the intensity of the negative-order beam output from the reference matter to the intensity relationship equation, and calculating absorbance using the intensity of the positive-order beam output from the subject and the intensity of the positive-order beam input to the subject and measuring a concentration of the component using the absorbance.

Method and apparatus for measuring a concentration of a component in a subject

A temperature controlled optoelectronic device includes an optoelectronic transducer having an active area, an electronic cooling device, on which the optoelectronic transducer is mounted, and a temperature sensor installed in the electronic cooling device. The temperature sensor and the electronic cooling device control a temperature of the optoelectronic transducer. A surface of an electronic cooling device directly contacts a base of the optoelectronic transducer for efficient thermal coupling. When the temperature sensor for monitoring the temperature of the optoelectronic transducer is directly attached to a substrate of the electronic cooling device, e.g., to an inside surface of a plate on which the optoelectronic transducer is mounted, the temperature of the optoelectronic transducer can be accurately sensed and adjusted to a precise target temperature.

Temperature controlled optoelectronic device

A diagnosis method and apparatus for measuring blood hemoglobin concentration, oxygen saturation, pulse rate, respiration rate, or degree of aging of blood vessels using light includes an input/output unit for receiving a command for measurement from a user and for providing information on the result of a measurement to the user; a control unit for receiving the command for measurement from the input/output unit and for generating a control signal; a light generating unit for generating at least two light beams for measurement according to the control signal; a light receiving unit for receiving the light beams transmitted through an object that is subject to measurement and for converting the received light beams into electrical signals; and a data processing unit for processing the electrical signals received from the light receiving unit and for outputting information on the result of a predetermined measurement.

Diagnostic method and apparatus using light

An apparatus and method for non-invasively measuring bio-fluid concentrations using photoacoustic spectroscopy includes a light source for irradiating an incident light having a predetermined wavelength band to be absorbed into a targeted component of a living body, an acoustic signal generator for generating a first acoustic signal having a similar frequency band as a photoacoustic signal that is generated when the incident light is absorbed into the targeted component, a ultrasonic translator for detecting the photoacoustic signal and a second acoustic signal that is a modulated signal of the first acoustic signal, a controller for generating the first acoustic signal in a predetermined frequency band, a light detector for detecting an intensity of the incident light, and a calculator capable of calculating a signal compensation value based on the incident light, the photoacoustic signal, and the coefficient of sound wave transmission, and capable of computing a concentration of the targeted component.

Apparatus and method for non-invasively measuring bio-fluid concentrations using photoacoustic spectroscopy

An apparatus and method for measuring blood pressure using linearly varying air pressure, including a compression unit; an air pump that injects air into the compression unit; a pressure sensor that senses and outputs the air pressure of the compression unit; an ADC that converts and outputs the result of the sensing as a pressure signal; a controller that calculates a current pressure value of the compression unit from the pressure signal and a linear pressure of the compression unit that is linearly dropped corresponding to the current pressure value and generates the first control signal in response to the current pressure value and a second control signal from the result of a comparison of the current pressure value and the linear pressure; a DAC that converts and outputs the second control signal as an exhaust control signal; and a proportional control valve that exhausts air from the compression unit.

Apparatus and method for measuring blood pressure using linearly varying air pressure

A method and apparatus for noninvasively monitoring hemoglobin concentration and oxygen saturation, wherein the method includes selecting at least two wavelengths from a region of wavelengths in which an extinction coefficient for water is smaller that for hemoglobin, the at least two wavelengths including at least two isobestic wavelengths; sequentially radiating incident light beams having the selected wavelengths onto a predetermined site of a body which includes a blood vessel; receiving, at another site of the body, light beams sequentially transmitted through the predetermined site and converting the received light beams into electrical signals; calculating the light attenuation variation caused by pulses of blood for the respective wavelengths from the electrical signals; obtaining at least one ratio of the light attenuation variation between the selected wavelengths; and calculating the hemoglobin concentration C in blood using the calculated at least one ratio of the light attenuation variation between the wavelengths.

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Seoul, South Korea

Gil-Won Yoon