ao United States
`a2) Patent Application Publication co) Pub. No.: US 2008/0177162 Al
`
` Baeet al. (43) Pub. Date: Jul. 24, 2008
`
`
`US 20080177162A1
`
`(54) BIOSIGNAL MEASUREMENT APPARATUS
`AND THE METHOD THEREOF
`
`(30)
`
`Foreign Application Priority Data
`
`Jan. 24,2007
`
`(KR) wee 10-2007-0007596
`
`(75)
`
`Inventors:
`
`Sang Gon Bae, Seongnam-si (KR);
`KunSoo Shin, Seongnam-si (KR);
`Kun Kook Park, Suwon-si (KR);
`Soo Kwan Kim, Seongnam-si
`(XR); Youn Ho Kim, Hwasung-si
`(KR)
`
`Publication Classification
`
`(51)
`
`Int. Cl.
`AGIB 35/1455
`
`(2006.01)
`
`Correspondence Address:
`STAAS & HALSEY LLP
`SUITE 700, 1201 NEW YORK AVENUE, N.W.
`WASHINGTON,DC 20005
`
`(73) Assignee:
`
`SAMSUNG ELECTRONICS
`CO., LTD., Suwon-si (KR)
`
`(21) Appl. No.:
`
`12/007,685
`
`(22) Filed:
`
`Jan. 14, 2008
`
`(52) US. CV oceanic 600/323; 600/587
`
`ABSTRACT
`
`(57)
`:
`.
`.
`A biosignal measurement apparatus including: a headset; a
`member being detachable from the headset, and being
`attached onto an ear of a user; a PPG sensor being attached
`onto the member to detect a PPG signal fromthe ear of the
`user; and an acceleration sensor being attached onto themem-
`berto detect an acceleration signal duc to a motion ofthe user
`from the ear ofthe user is provided.
`
`140
`
`CONTROL
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`001
`
`Apple Inc.
`APL1023
`8,923,941
`
`U.S. Patent No.
`
`FITBIT,
`
`Ex. 1023
`
`Apple Inc.
`APL1023
`U.S. Patent No. 8,923,941
`
`001
`
`FITBIT, Ex. 1023
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`

`

`Patent Application Publication
`
`Jul, 24, 2008 Sheet 1 of S
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`US 2008/0177162 Al
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`Patent Application Publication
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`Jul, 24, 2008 Sheet 2 of 5
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`US 2008/0177162 Al
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`FIG. 2
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`Patent Application Publication
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`Jul, 24, 2008 Sheet 3 of S
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`US 2008/0177162 Al
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`

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`Patent Application Publication
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`Jul, 24, 2008 Sheet 4 of 5
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`US 2008/0177162 Al
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`FIG. 4
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`Patent Application Publication
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`Jul, 24, 2008 Sheet 5 of 5
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`US 2008/0177162 Al
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`US 2008/0177162 Al
`
`Jul. 24, 2008
`
`BIOSIGNAL MEASUREMENT APPARATUS
`AND THE METHOD THEREOF
`
`CROSS-REFERENCE ‘TO RELATED
`APPLICATION
`
`[0001] This application claims the benefit of Korean Patent
`Application No. 10-2007-0007596,filed on Jan. 24, 2007, in
`the Korean Intellectual Property Office, the disclosure of
`whichis incorporated herein by reference.
`
`BACKGROUND
`
`
`
`1. Field
`[0002]
`[0003] Embodiments relate to a biosignal measurement
`sensor instrument and a headset instrument having the bio-
`signal measurement sensor instrument and a pendantinstru-
`ment having the biosignal measurement sensor instrument,
`and more particularly,
`to a biosignal measurement sensor
`instrument which can provide a photoplethysmography
`(PPG) sensorandan acceleration sensor to a member, detach-
`able from a headset or a pendant, to be adjacent to each other,
`detect a PPG signal and an acceleration signal froman ear o
`a user, and eliminate noise in the PPG signalusing, the accel-
`eration signal when the member contacts with the ear of the
`user, and thereby can more accurately detect and climinate
`dynamic noise included in the PPG signal due to a motion o
`the user and provide user convenience, and a headset instru-
`ment having the biosignal measurement sensor instrumen
`and a pendant instrument having the biosignal measuremen
`sensor instrument
`[0004]
`2. Description of the Related Art
`[0005] Asused in the present specification, the term “Ubiq-
`uitous” means an information communication environmen
`where a user can be free to access networks at any place
`without being conscious ofthe surrounding networks or com-
`puters. If ubiquitous is commercialized, anyone can readily
`use information technology not only at homeorin a car, bu
`also even on a mountaintop. Also, the commercialization o
`Ubiquitous may expand the information technologyindustry
`or the scope corresponding thereto by increasing the number
`ofcomputer users who are connected to networks. Because o
`its advantage that users can access networks without restric-
`tion to time and place, not to mention its portability and
`convenience, countries worldwide are expanding develop-
`ment and competing in Ubiquitous-related technology now.
`[0006] Ubiquitous-related technology maybe applied to
`myriad field in human life. In particular, Ubiquitous-Health-
`Care (hereinafter, U-HealthCare) has recently been in the
`spotlight as a notable technologyarea due to the “well-being”
`boom. U-HealthCare means Ubiquitous technology which
`enables anyoneto readily receive medical services at any time
`and at any place by installing medical service-related chips or
`sensors in places ofthe user’s living space. With U-Health-
`Care, various types of medical attention, such as physical
`examinations, disease management, emergencycare, consul-
`tation with a doctor and the like, which currently are only
`performed in hospitals, may be naturally integrated into our
`daily lives, thus may be accomplished without going to a
`hospital.
`[0007] Tor example, a diabetic may weara belt having a
`blood-sugar management system for blood-sugar manage-
`ment. A blood-sugar sensorattached to the belt may check the
`blood-sugar of the diabetic upon a specified occasion, and
`calculate the amount of required insulin corresponding
`
`thereto. When the blood-sugarof the diabetic becomes dras-
`tically low or high, the belt may provide the blood-sugar
`information to his/her attending physician using a wireless
`network, and the attending physician who has received the
`blood-sugar information may write out an optimal prescrip-
`tion or take the optimal action for the medical emergency.
`[0008] As an example of U-HealthCare, a portable biosig-
`nal measurement device to measurethe user’s biosignalusing,
`an optical sensor is being widely utilized. The user may carry
`the portable biosignal measurement device at all times and
`measurevarioustypesofbiosignals and thereby may prepare
`for an emergencysiluation. Accordingly, the portable biosig-
`nal measurement device may be regarded as a device capable
`of showing advantages of U-HealthCare.
`[0009] The portable biosignal measurement apparatus
`includes
`a photoplethysmography (PPG) measurement
`device. A PPG includes information about a level of periph-
`eral vasoconstriction, and increase and. decrease in a cardiac
`output. Therefore, a physiological status associated with an
`arterial tube may be understood using the PPG measurement
`device. Also, the PPG measurement device may be generally
`utilized as an auxiliary diagnostic device for a particular
`disease.
`[0010] Generally, a PPG signal may be measured from a
`user’s finger, earlobe, and the like. Specifically, a detector
`may detect the user’s PPG signal by detecting light, passing,
`throughthe finger, earlobe, and the like, from a light source.
`However, when a PPG signal is weak, for cxample, a PPG
`signal detected fromthe earlobe, and thelike, a normal PPG
`signal may not be detected.
`[0011] Whena measurement device measures a PPG signal
`from a body portion corresponding to a weak signal source,
`such as the earlobe, and the like, alevel ofthe PPG signal may
`beless than noise ofthe measurementdevice. Specifically, the
`level ofthe PPG signal maybeless than a systemnoise level.
`‘Therefore, although the weak PPG signal is amplified, the
`system noise is also amplified and thus a desired PPG signal
`may not be accurately detected.
`[0012] As described, when measuring a PPG signal from
`the earlobe, the most importantissue is to eliminate dynamic
`noise which is caused by a motion of a system. When an
`apparatus to measure a PPG signal is configured to be por-
`table, the apparatus is generally included in a headset. Spe-
`cifically, a PPG sensor maybe provided ona speaker area of
`the headset, contacting withthe ear of a user, so that the user
`mayreadily measure the PPG signal while listening to music
`using the headset.
`the headset may not
`in this instance,
`[0013] However,
`closely adhereto the ear ofthe userat all times and thus a PPG
`signal may not be accurately measured. Also, significant
`noise may occur due to the motion of the headset.
`[0014] Accordingly, there is a need for a portable biosignal
`measurement device capable of accurately detecting and
`eliminating dynamic noise, caused by a motion of a user,
`when measuring a PPG signal from the ear of the user, and
`thereby providing user convenience.
`
`SUMMARY
`
`[0015] Additional aspects and/or advantages will be set
`forth in part in the description which follows and,in part, will
`be apparent from the description, or may be learned by prac-
`tice of the invention.
`[0016] An aspect of the present invention provides a bio-
`signal measurement apparatus which can provide a photopl-
`
`007
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`US 2008/0177162 Al
`
`Jul. 24, 2008
`
`appreciated from the following description of exemplary
`cthysmography (PPG)sensor and an acceleration sensorto be
`embodiments, taken in conjunction with the accompanying
`adjacent to each otherto detect an acceleration signal having
`drawings of which:
`greaterrelation with dynamic noise included in a PPGsignal,
`and eliminate the dynamic noise in the PPG signal using the
`[0024]
`FIG. 1 isa block diagram illustrates a configuration
`acceleration signal, and thereby can more accurately measure
`of a biosignal measurement pendant device according to an
`a PPGsignal ofauser. In this instance, the PPG sensor detects
`exemplary embodiment of the present invention:
`the PPG signal from (theearof) the user. Also, the accelera-
`[0025]
`['IG. 2 illustrates a substantially configured form of
`tion sensordetects the acceleration signal from (the ear of) the
`user.
`a biosignal measurement pendant apparatus according to an
`exemplary embodiment
`ofthe present invention:
`[0026]
`FIG. 3isablock diagramillustrating a configuration
`of a biosignal measurement headset device according to an
`exemplary embodiment
`ofthe present invention;
`[0027]
`FIG. 4 illustrates a substantially configured form of
`a biosignal measurement headset device according to an
`exemplary embodiment
`ofthe present invention; and
`[0028]
`FIG. 5isa block diagramillustrating a configuration
`of a biosignal measurement sensor device according to an
`exemplary embodiment of the present invention.
`
`
`
`
`
`
`
`[0017] Another aspect of the present invention also pro-
`vides a biosignal measurement headset device which can
`provide a PPG sensorand an acceleration sensor to a member,
`detachable from a headsetand attached onto the ear of a user,
`to be adjacent to each other, and detect an acceleration signal
`having greater relation with dynamic noise included in a PPG
`signal and eliminate the dynamic noise in the PPG signal, and
`thereby can more accurately measure the PPGsignal. In this
`instance, the PPG sensor detects the PPG signal from the car
`ofthe user. Also, the acceleration sensor detects the accelera-
`tion signal from theearof the user.
`[0018] Another aspect of the present invention also pro-
`vides a biosignal measurement pendant device which can
`provide a PPG sensorand an acceleration sensor to a member,
`detachable froma pendant and attached onto the ear of'a user,
`to be adjacent to each other, and.detect an acceleration signal
`having greater relation with dynamic noise included in a PPG
`signal and eliminate the dynamic noise in the PPG signal, and
`thereby can more accurately measure the PPG signal. In this
`instance, the PPG sensor detects the PPG signal fromthe ear
`of the user. Also, the acceleration sensor detects the accelera-
`tion signal from theearofthe user.
`[0019] According to an aspect of the present invention,
`there is provided a biosignal measurement sensor device
`including: a memberbeing attached onto an car of a user; a
`PPGsensorbeing attached onto the memberto detect a PPG
`signal from the ear of the user; and an acceleration sensor
`being attached onto the member to detect an acceleration
`signal due to a motion ofthe user from the earof the user.
`[0020] According to another aspect of the present inven-
`tion,
`there is provided a biosignal measurement headse
`device including: a headset; a memberbeing detachable from
`the headset, and being attached onto an ear of a user; a PPG
`sensorbeing attached onto the memberto detect a PPG signa
`from the ear of the user; and an acceleration sensor being
`attached onto the memberto detect an acceleration signal due
`to a motion of the user fromthe ear of the user.
`
`DETAILED DESCRIPTION OF THE
`EMBODIMENTS
`
`[0029] Reference will now be madein detail to exemplary
`embodiments ofthe present invention, examples ofwhich are
`illustrated in the accompanying drawings, whercin like ref-
`erence numerals refer to the like elements throughout. Exem-
`plary embodimentsare described below lo explain the present
`invention by referring to the figures.
`[0030]
`FIG. 1isa block diagramillustrating a configuration
`of a biosignal measurement pendant device according to an
`exemplary embodimentofthe present invention.
`[0031] The biosignal measurement pendant device accord-
`ing to the present exemplary embodiment includes a member
`110 and a pendant 120.
`[0032] The member 110 maybe designed to be detachable
`from the pendant 120. The form of the member 110 and the
`pendant 120 according to an exemplary embodimentof the
`present invention will be described with reference to FIG. 2.
`[0033]
`FIG.2 illustrates a substantially configured form of
`a biosignal measurement pendant device according to an
`exemplary embodimentof the present invention.
`[0034] As shownin FIG.2, apendant 220 may be embodied
`ina form of a necklace. The pendant 220 may connect with a
`
`portable device, such as a Motion Picture Experis Group
`Audio Layer 3 (MP3) player, a mobile communicationter-
`minal, a compact disc (CD) player, a portable game device,
`and the like. Also, the pendant 220 may connect the portable
`device and an earphone 230. Specifically, when the portable
`device corresponds to an MP3 player, the pendant 220 may
`receive sound from the MP3 player and provide a user with
`the sound using the carphone 230.
`[0035]
`In this instance, a member 210 may be detachable
`from the pendant 220. Specifically, the member 210 may be
`integrally attached onto the pendant 220. Also, the member
`210 maybe detached from the pendant 220 bya user and then
`attached onto an ear of the user. As shown in FIG. 2, the
`member 210 may be formedina shape of tongs. Specifically,
`the user may detach the member 210 from the pendant 220
`and attach the member 210 onto the user’s car so that the tongs
`maybe clipped onto the user’s ear. The member 210 and the
`pendant 220 may connect with each other using a wired line
`or using a local communication network.
`
`008
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`FITBIT, Ex. 1023
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`
`[0021] According to still another aspect of the presen
`invention, there is provided a biosignal measurement pendan’
`device including: a pendant; a memberbeing detachable from
`the pendant, and being attached onto an ear ofa user; a PPG
`sensorbeing attached onto the memberto detect a PPG signa
`from the ear of the user; and an acceleration sensor being
`attached onto the memberto detect an acceleration signal due
`to a motion of the user fromthe ear of the user.
`
`[0022] Additional aspects, features, and/or advantages o
`the invention will be set forth in part in the description which
`followsand, in part, will be apparent from the description, or
`may be learned by practice of the invention.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`[0023] These and/or other aspects, features, and advantages
`of the invention will become apparent and more readily
`
`
`
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`US 2008/0177162 Al
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`Jul. 24, 2008
`
`
`
`motionless, it is possible to reduce a noise signal occurrence
`[0036] Referring again to FIG. 1, the member 110 where a
`photoplethysmography (PPG) sensor 111, an acceleration
`of a system, which may be caused by motion of the earphone
`sensor 114, andafirst communication inlerface 115 are
`140 or the pendant 120. Accordingly, it is possible to more
`accommodatedin.
`accurately detect an acceleration signal having greater rela-
`[0037]
`‘The PPG sensor 111 includes a luminous element
`tion with the dynamicnoise signal included in the PPG signal.
`Tt is understood that a shape of the memberis not limited to.
`112 anda photo detector 113. As described above with refer-
`[0045]
`Thefirst communication interface 115 is located in
`ence to FIG.2, according to an exemplary embodimentofthe
`the member 110. The first communication interface 115
`present invention, the member 110 may be formedin a shape
`oftongs. In FIG. 1, when the member 110 is formed in the
`transmits the detected PPG signal and the acceleration signal
`shape of tongs, the luminous element 112 and. the photo
`to the pendant 120. In this instance,the first communication
`detector 113 maybe provided on inner surfaces of the tongs
`interface 115 maybe configured as a predetermined input/
`respectively. Specifically, when the member 110 formed in
`output terminal to make a wired connection with the pendant
`the shape of tongs is clipped onto the ear of the user, the
`120. Also,
`the first communication interface 115 may be
`luminous element 112 and the photo detector 113 may be
`configured as a predetermined local communication module
`attached onto both sides of the ear of the user, respectively,
`to make a wireless connection with the pendant 120.
`and thereby closely contact with the ear of the user.
`[0046] A sccond communication interface 121, a signal
`[0038] The luminous element 112 mayinclude a light emit-
`processing module 122, and a control unit 123 are accommo-
`
`ting diode (LED,not shown). Also, in addition to the LED,the
`dated in the pendant 120.
`luminous element 112 may include any type of material,
`[0047] The second communication interface 121 receives
`which can emit light towards the skin of the user to measure
`the PPG signal and the acceleration signal from the member
`110. In this instance, the second communication interface 121
`a PPGsignal.
`[0039] The photo detector 113 detects light from the ear of
`may be configured as a predetermined input/output terminal
`to make a wired connection with the member 110. Also, the
`the user. Specifically, the photo detector 113 detects the light,
`which is emitted from the luminous element 112 towards the
`second communication interface 121 may be configured as a
`ear ofthe user, fromthe earofthe user.
`predetermined local communication module to make a wire-
`less connection with the member 110.
`[0040] An acceleration sensor 114 is attached onto the
`member 110 to detect an acceleration signal duc to a motion
`[0048] The signal processing module 122 climinates the
`of the user from the ear of the user. The acceleration sensor
`dynamic noise signal included in the PPG signal by using the
`114 may be provided to be adjacent to the PPG sensor 111.
`acceleration signal. As the dynamic noise signal is elimi-
`Specifically, when the member 110 in the shape oftongsis
`nated, the signal processing module 122 may more accurately
`closely clipped onto the ear of the user, the acceleration
`measure a PPG signal of the user. Specifically, the signal
`sensor 114 is provided in parallel with the PPG sensor 111
`processing module 122 may eliminate the dynamic noise
`contacting with the ear of the user and thereby may measure
`signal, and also may create various types of biosignal infor-
`the acceleration signal fromthe ear of the user.
`mationofthe user from the PPG signal in which the dynamic
`noise signal is eliminated.
`[0041] As described above, when the PPG sensor 111 and
`the acceleration sensor 114 are provided to be adjacent to
`[0049]
`Thesignal processing module 122 may transmit the
`PPGsignal in which the dynamic noise signal is climinated,
`each other, a dynamic noise signal due to the motion of the
`to a portable device 130 using the second communication
`user may be more accurately detected using the acceleration
`interface 121. In this instance, the second communication
`sensor 114. Specifically, the dynamic noise signal occurs due
`interface 121 may be configured as a predetermined input/
`to the motionofthe user and is included in the PPG signal. In
`output terminal to make a wired connection with the portable
`this instance, the dynamic noise signal may be more accu-
`device 130. Also, the second communication interface 121
`rately eliminated by using the acceleration signal which is
`may be configured as a predetermined local communication
`detected using the acceleration sensor 114.
`module to make a wireless connection with the portable
`[0042] The dynamic noise signal included in the PPG sig-
`device 130.
`nal is physically different from the acceleration signal. How-
`ever, when the acceleration signal and the dynamic noise
`signalare significantly related, the dynamic noise signal may
`be accurately detected and eliminated in the PPG signal.
`Accordingly, to accurately detect the dynamic noise signal, a
`measurementlocation ofthe acceleration signal shouldbe set
`to a location having a greater relation with a measurement
`location of the PPG signal.
`[0043]
`Specifically, in the biosignal measurement pendant
`device according to the present exemplary embodiment
`shown in FIG. 1, when the PPG sensor 111 and the accelera-
`tion sensor 114 are attached onto the member 110 to be
`adjacent to each other, it is possible to increase the relation
`betweenthe acceleration signal and the dynamic noisesignal.
`Specifically, it is possible to accurately detect and eliminate
`the dynamic noise signal included in the PPG signal byusing
`the acceleration signal.
`[0044] Also, in FIG. 1, when the member110 is provided
`separately from the pendant 120 and an earphone 140, and the
`member 110 is closely clipped onto the ear of the user to be
`
`[0050] Also, unless the signal processing module 122
`eliminates the dynamic noise signal in the PPG signal by
`using the acceleration signal, the control unit 123 maytrans-
`mit the PPG signal and the acceleration signal to the portable
`device 130, which are received from the member 110, using
`the second communication interface 121. Specifically,
`instead of the pendant 120, the portable device 130 may
`eliminate the dynamic noise signal in the PPG signal. Also,
`the control unit 123 may receive a sound signal from the
`portable device 130, and output the sound signal using the
`earphone 140.
`[0051]
`FIG. 3 isablock diagram illustrating a configuration
`of a biosignal measurement headset device according to an
`exemplary embodimentofthe present invention.
`[0052] The biosignal measurement headset device accord-
`ing to the present exemplary embodiment includes a member
`310 and a headset 320.
`
`[0053] The member 310 maybe designed to be detachable
`tromthe headset 320. The form of the member 310 and the
`
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`US 2008/0177162 Al
`
`Jul. 24, 2008
`
`signal are significantly related, the dynamic noise signal may
`headset 320 according to an exemplary embodiment of the
`be accurately detected and eliminated in the PPG signal.
`present invention will be described with reference to FIG.4.
`Accordingly, to accurately detect the dynamic noise signal, a
`[0054]
`FIG.4 illustrates a substantially configured form of
`measurementlocationofthe acceleration signal should be set
`a biosignal measurement headset device according to an
`to a location having a greater relation with a measurement
`exemplary embodimentofthe present invention.
`location of the PPG signal.
`[0055] A headset 420 mayconnect with a portable device,
`[0063]
`Specifically, in the biosignal measurement headset
`such as an MP3 player, a mobile communication terminal, a
`device according to the present exemplary embodiment
`CD player, a portable game device, and the like.A member
`shownin FIG. 1, when the PPG sensor 311 andthe accelera-
`410 maybe detachable from the headset 420. Specifically, the
`tion sensor 314 are attached onto the member 310 in the shape
`member 410 may be integrally attached onto the headset 420.
`oftongs to be adjacent to each other, it is possible to increase
`Also, the member 410 may be detached fromthe headset 420
`the relation between the acceleration signal and the dynamic
`by a user and then attached onto the ear of the user. In this
`noise signal. Specifically, it is possible to accurately detect
`instance, the member 410 may be formed in a shape of tongs
`and eliminate the dynamic noise signal included in the PPG
`as shown in FIG. 4. Specifically, the user may detach the
`member410 tromthe headset 420 and thenattach the member
`signal by using the acceleration signal.
`[0064] Also, in FIG. 3, when the member 310, where the
`410 in the shape of tongs onto the user’s car so that the tongs
`PPGsensor 311 and the acceleration sensor 314 are accom-
`may be clipped on the user’s ear. The member 410 and the
`modatedin, is provided separately from the headset 320, and
`headset 420 may connect with each other using wireless
`interface, a wired line or a local communication network.
`the member 310 inthe shape oftongsis closelyclipped onto
`[0056] Referring again to FIG.3, the member 310 includes
`the ear of the user without to be motionless, it is possible to
`a PPG sensor 311, an acceleration sensor 314, andafirst
`reduce a noise signal occurrence of a system, which may be
`communication interface 315.
`caused by motion of the headset 320. Accordingly, it is pos-
`sible to more accurately detect an acceleration signal having
`[0057] The PPG sensor 311 includes a luminous element
`greater relation with the dynamic noise signal included in the
`312 anda photo detector 313. As described above with refer-
`PPG signal.
`ence to FIG.4, according to the present exemplary embodi-
`[0065]
`Thefirst communicationinterface 315 is accommo-
`ment, the member 310 may be formed in a shape of tongs. In
`dated in the member 310. Thefirst communication interface
`FIG.3, when the member310 is formed in the shape oftongs,
`the luminous element 312 and the photo detector 313 may be
`315 transmits the detected PPG signal and the acceleration
`provided on innersurfaces of the tongs respectively. Specifi-
`signal to the headset 320. In this instance, the first communi-
`cally, when the member 310 formed in the shape oftongs is
`cation interface 315 may be configured as a predetermined
`clipped onto the ear ofthe user, the luminous element 312 and
`input/output terminal to make a wired connection with the
`the photo detector 313 maybe attached onto both sides of the
`headset 320. Also, the first communication interface 315 may
`ear ofthe user, respectively. and thereby closely contact with
`be configured as a predetermined local communication mod-
`the ear of the user.
`ule to make a wireless connection with the headset 320.
`[0058] The luminous element 312 may include an LED (not
`[0066] The headset 320 includes a second communication
`shown). Also, in addition to the LED, the nminous element
`interface 321, a signal processing module 322, and a control
`unit 323.
`312 may include any type of material, which is widely uti-
`lized in the art to emit light towards the skin of the user to
`‘Lhe second communication interface 321 receives
`[0067]
`measure the PPG signal.
`the PPG signal and the acceleration signal from the member
`[0059] The photo detector 313 detects light from the ear of
`310. Inthis instance, the second communication interface 321
`the user. Specifically, the photo detector 313 detects the light,
`may be configured as a predetermined input/output terminal
`which is emitted from the luminous element 312 towards the
`to make a wired connection with the member 310. Also, the
`ear of the user, from the earof the user.
`second communication interface 321 may be configured as a
`[0060] An acccleration sensor 314 is attached onto the
`predetermined local communication module to make a wire-
`less connection with the member 310.
`member310 to detect an acceleration signal due to a motion
`of the user from the ear of the user. The acceleration sensor
`[0068] The signal processing module 322 eliminates the
`314 maybe provided to be adjacent to the PPG sensor 311.
`dynamic noise signal included in the PPG signal by using the
`Specifically, when the member 310 in the shape of tongs 1s
`acceleration signal. As the dynamic noise signal is elimi-
`closely clipped onto the ear of the user, the acceleration
`nated,the signal processing module 322 may more accurately
`sensor 314 is provided in parallel with the PPG sensor 311
`measure a PPG signal of the user. Specifically, the signal
`contacting, with the ear of the user and thereby may measure
`processing module 322 mayeliminate the dynamic noise
`the acceleration signal fromthe ear ofthe user.
`signal, and also may create various types of biosignal infor-
`[0061] As described above, when the PPG sensor 311 and
`mationofthe user from the PPG signal in whichthe dynamic
`the acceleration sensor 314 are provided to be adjacent to
`noise signal is eliminated.
`each other, a dynamic noise signal due to the motion of the
`[0069]
`Thesignal processing module 322 maytransmit the
`user may be more accurately detected using the acceleration
`PPG signal in which the dynamic noise signal is eliminated,
`sensor 314. Specifically, the dynamic noise signal occurs due
`to a portable device 330 using the second communication
`interface 321. In this instance, the second communication
`to the motionofthe userand is included in the PPG signal. In
`this instance, the dynamic noise signal may be more accu-
`interface 321 may be configured as a predetermined input/
`rately eliminated by using the acceleration signal which is
`output terminal to make a wired connection with the portable
`device 330. Also, the second communication interface 321
`detected using the acceleration sensor 314.
`[0062] The dynamic noise signal included in the PPG sig-
`may be configured as a predetermined local communication
`nal is physically different from the acceleration signal. How-
`module to make a wireless connection with the portable
`device 330.
`ever, when the acceleration signal and the dynamic noise
`
`010
`
`FITBIT, Ex. 1023
`
`010
`
`FITBIT, Ex. 1023
`
`

`

`US 2008/0177162 Al
`
`Jul. 24, 2008
`
`[0070] Also, unless the signal processing module 322
`eliminates the dynamic noise signal in the PPG signal by
`using the acceleration signal, the control unit 323 may trans-
`mit the PPG signal and the acceleration signal, which are
`received from the member 310, to the portable device 330
`using the second communication interface 321. Specifically,
`instead ofthe headset 320,the portable device 330 mayelimi-
`nate the dynamic noise signal in the PPG signal. Also, the
`contro! unit 323 mayreceive a sound signal from the portable
`device 330, and output the sound signal using a speaker 324.
`[0071] FIG.5isa block diagram illustrating a configuration
`of a biosignal measurementsensor instrument 510 according
`to an exemplary embodimentof the present invention.
`[0072] The biosignal measurement sensor instrument 510
`according to the present exemplary embodiment may be
`embodied as an independent configuration from the above-
`described biosignal measurement headset instrument or pen-
`dant instrument. Specifically, the biosignal measurement sen-
`sor instrument 510 may be configured to measure a PPG
`signal and an acceleration signal, eliminate a dynamic noise
`signal in the PPG signal by using the acceleration signal, and
`transmitat least one ofthe PPGsignal, the accelerationsignal,
`and the PPG signal in which the dynamic noise signal is
`eliminated, to an external device.
`[0073]
`‘The biosignal measurement sensor device 510
`includes a PPG sensor 511, an acceleration sensor 514, a
`signal processing module, 515, and a local communication
`module 516.
`[0074] The PPG sensor 511 includes a luminous element
`512 and a photo detector 513. The biosignal measurement
`sensor device 510 may be formed in a shape of tongs. When
`the biosignal measurement sensor device 510 is formed in the
`shape of tongs, the luminous element 512 and the photo
`detector 513 maybe provided oninner surfaces of the tongs
`respectively. Specifically, when the biosignal measurement
`sensor device 510 formed in the shape oftongsis clipped onto
`the ear of the user, the luminous element 512 and the photo
`detector 513 may be attached onto both sides of the ear of the
`user, respectively, and thereby closely contact with the ear of
`the user.
`
`‘Lhe luminous element 512 may include an LED.
`[0075]
`Also, in addition to the LED,