# US 2019/0167199 A1 · Apparatus and method for measuring bio-information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167199 A1 - Document ID: US20190167199A1 - Status: Published application - Kind: A1 - Application number: 16/034,525 - Filed: 2018-07-13 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: JUNG YONG NAM; JOON HYUNG LEE; KI YOUNG CHANG; JEONG EUN HWANG - Web page: https://patentgrep.com/patent/US20190167199A1 ## CPC - A61B 5/7203: {for noise prevention, reduction or removal} - A61B 5/01: Measuring temperature of body parts {; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue} (clinical contact thermometers G01K13/20) - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/14546: {for measuring analytes not otherwise provided for, e.g. ions, cytochromes} - A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters - A61B 5/489: {Blood vessels} - A61B 5/7405: {using sound} - A61B 5/742: {using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339)} - A61B 5/7455: {characterised by tactile indication, e.g. vibration or electrical stimulation} - A61B 5/14552: {Details of sensors specially adapted therefor} - A61B 2562/0238: Optical sensor arrangements for performing transmission measurements on body tissue - A61B 2562/043: in a linear array - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An apparatus for non-invasively measuring bio-information is provided. The apparatus includes a plurality of light sources configured to emit light to a first region and a second region of an object, a detector configured to detect a first scattered light signal from the first region and a second scattered light signal from the second region and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal, and a processor configured to correct the first electrical signal based on the second electrical signal and measure bio-information based on a correction result. ## Claims ### Claim 1 An apparatus to measure bio-information, the apparatus comprising: a plurality of light sources configured to emit light to a first region and a second region of an object; a detector configured to detect a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal; and a processor configured to correct the first electrical signal based on the second electrical signal and measure the bio-information based on the corrected first electrical signal. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the first region comprises a blood vessel region and the second region comprises a non-blood vessel region. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the processor is further configured to sequentially drive each of the plurality of light sources in a time-division manner. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the processor is further configured to select a first light source among the plurality of light sources to emit light to the first region and a second light source from among the plurality of light sources to emit light to the second region from the plurality of light sources based on a preset criteria, and sequentially drive the first light source and the second light source to emit light. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the plurality of light sources comprise at least one of a light emitting diode (LED) and a laser diode which emit light of an infrared band. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the detector comprises a plurality of photodiode arrays disposed at different distances, respectively, from the plurality of light sources. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the processor is further configured to correct the first electrical signal based on a rate of change of the second electrical signal at a time point. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the processor is further configured to calculate a first scattering coefficient and a second scattering coefficient based on the first electrical signal and the second electrical signal, respectively, and correct the first scattering coefficient at a second time point based on a rate of change of the first scattering coefficient and a rate of change of the second scattering coefficient during a period from a first time point to the second time point. ### Claim 9 (depends on 1) The apparatus of claim 1, further comprising a communication interface configured to transmit at least one of the first electrical signal, the second electrical signal, the corrected first electrical signal, and the measured bio-information to an external device. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the processor is further configured to generate guide information corresponding to contact positions on the object of the plurality of light sources based on receiving a request to measure bio-information. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the guide information comprises a guide image generated by superimposing visual information representing at least one of the first region and the second region or visual information representing at least one of the plurality of light sources on an image of the object. ### Claim 12 (depends on 10) The apparatus of claim 10, further comprising an outputter configured to output at least one of the first electrical signal, the second electrical signal, the corrected first electrical signal, the measured bio-information, and the guide information. ### Claim 13 (depends on 1) The apparatus of claim 1, further comprising a storage configured to store at least one of value of the first electrical signal, value of the second electrical signal, the corrected electrical signal, and the measured bio-information. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the bio-information comprises at least one of blood glucose, cholesterol, triglyceride, skin temperature, protein, and uric acid. ### Claim 15 A method of measuring bio-information, the method comprising: emitting light to a first region and a second region of an object by a plurality of light sources; detecting a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and outputting a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal; correcting the first electrical signal based on the second electrical signal; and measuring bio-information based on the corrected first electrical signal. ### Claim 16 (depends on 15) The method of claim 15, wherein the first region comprises a blood vessel region and the second region comprises a non-blood vessel region. ### Claim 17 (depends on 15) The method of claim 15, wherein the emitting of the light comprises sequentially driving the plurality of light sources in a time-division manner. ### Claim 18 (depends on 15) The method of claim 15, wherein the correcting of the first electrical signal comprises correcting the first electrical signal based on a rate of change of the second electrical signal at a time point. ### Claim 19 (depends on 18) The method of claim 18, wherein the correcting of the first electrical signal comprises: calculating a first scattering coefficient and a second scattering coefficient based on the first electrical signal and the second electrical signal, respectively; and correcting the first scattering coefficient at a second time point based on a rate of change of the first scattering coefficient and a rate of change of the second scattering coefficient during a period from a first time point to the second time point. ### Claim 20 (depends on 15) The method of claim 15, further comprising outputting the measured bio-information. ### Claim 21 (depends on 15) The method of claim 15, further comprising: generating guide information corresponding to contact positions on the object of the plurality of light sources based on receiving a request to measure bio-information; and outputting the generated guide information. ### Claim 22 A wearable device comprising: a main body; a strap connected to the main body and configured to fix the main body to an object; an optical apparatus disposed in the main body and configured to emit light to a first region and a second region of the object, detect a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal; and a processor disposed in the main body and configured to correct the first electrical signal based on the second electrical signal, and measure bio-information based on the corrected first electrical signal. ### Claim 23 (depends on 22) The wearable device of claim 22, wherein the first region comprises a blood vessel region and the second region comprises a non-blood vessel region. ### Claim 24 (depends on 22) The wearable device of claim 22, wherein the optical apparatus comprises: a plurality of light sources driven in a time-division manner by the processor; and a plurality of detectors disposed at different distances from the plurality of light sources, respectively. ### Claim 25 (depends on 22) The wearable device of claim 22, further comprising a display disposed in the main body and configured to display guide information corresponding to a contact position on the object of the optical apparatus based on receiving a request to measure bio-information. ### Claim 26 (depends on 25) The wearable device of claim 25, further comprising an image capturer disposed in the main body and configured to acquire an image of the object to generate the guide information. ### Claim 27 (depends on 25) The wearable device of claim 25, further comprising a communication interface disposed in the main body and configured to receive an image of the object, to generate the guide information, from an external device. ### Claim 28 (depends on 22) The wearable device of claim 22, wherein the processor is further configured to correct the first electrical signal based on a rate of change of the second electrical signal at a time point. ### Claim 29 An apparatus to measure bio-information, the apparatus comprising: a first light source and a second light source configured to emit light to a first region and a second region of an object, respectively; a detector configured to detect a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal; and a processor configured to correct the first electrical signal based on the second electrical signal, and measure the bio-information based on the corrected first electrical signal, wherein the first region comprises a blood vessel region and the second region comprises a non-blood vessel region. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the first light source comprises at least one light source and the second light source comprises at least one light source. ### Claim 31 (depends on 30) The apparatus of claim 30, wherein the processor is further configured to sequentially drive the first light source and the second light source in a time-division manner. ### Claim 32 (depends on 29) The apparatus of claim 29, wherein the processor is further configured to correct the first electrical signal based on a rate of change of the second electrical signal at a time point. ### Claim 33 (depends on 29) The apparatus of claim 29, wherein the processor is further configured to generate guide information corresponding to contact positions on the object of the first light source and the second light source based on receiving a request to measure bio-information. ### Claim 34 (depends on 33) The apparatus of claim 33, further comprising an outputter configured to output at least one of the first electrical signal, the second electrical signal, the corrected first electrical signal, the measured bio-information, and the guide information, wherein the outputter comprises at least one of a display, an audio, a haptic apparatus.