# US 12,594,039 B2 · Electronic device and method for correcting biometric data on basis of distance between electronic device and user, measured using at least one sensor

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- Number: US 12,594,039 B2
- Document ID: US12594039B2
- Status: Granted
- Kind: B2
- Application number: 17/614,665
- Filed: 2020-05-08
- Published: 2022-08-11
- Granted: 2026-04-07
- Earliest claimed: 2019-05-31
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sohyun Chung
- Web page: https://patentgrep.com/patent/US12594039B2

## CPC

- A61B 5/0077: {Devices for viewing the surface of the body, e.g. camera, magnifying lens}
- A61B 5/7203: {for noise prevention, reduction or removal}
- A61B 5/021: Measuring pressure in heart or blood vessels
- A61B 5/02416: {using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence)}
- A61B 5/681: {Wristwatch-type devices}
- A61B 5/6898: {Portable consumer electronic devices, e.g. music players, telephones, tablet computers}
- G06T 7/50: Depth or shape recovery
- G06V 10/98: Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
- G06V 40/172: {Classification, e.g. identification}
- A61B 5/0285: Measuring or recording phase velocity of blood waves
- A61B 5/1102: {Ballistocardiography}
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/318: Heart-related electrical modalities, e.g. electrocardiography [ECG]
- G06T 2207/10028: Range image; Depth image; 3D point clouds
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

According to various embodiments of the present invention, an electronic device may comprise a first sensor, a processor operably connected to the first sensor, and a memory operably connected to the processor, wherein the memory stores instructions that, when executed by the processor, cause the electronic device to: when a signal for measuring biometric information is detected, acquire depth information about a user of the electronic device from the first sensor; determine a position of a biometric reference point of the user, on the basis of the acquired depth information about the user; acquire a biometric signal relating to a measurement point of the user from the first sensor; calculate a distance between the measurement point and the biometric reference point; and correct biometric data about the user on the basis of the calculated distance and the acquired biometric signal. In addition to the various embodiments disclosed in the present invention, various other embodiments are also possible.

## Claims

### Claim 1

An electronic device, comprising:
a depth sensor;
a biometric sensor;
memory storing instructions; and
a processor,
wherein the instructions, when executed by the processor, cause the electronic device to:
detect a signal for measuring biometric information,
obtain, in response to the signal, depth information of a user of the electronic device from the depth sensor, wherein the depth information includes information for at least one of a location of a face, eyes, nose, mouth, or upper body of the user,
determine, as a point corresponding to the user's heart, a biometric reference point identified based on the obtained depth information,
obtain the biometric information of the user's heart from the biometric sensor based on a part of the user's body being in contact with the biometric sensor,
calculate, using the depth sensor, a distance between the part of the user's body in contact with the biometric sensor and the user's heart,
determine a blood vessel length between the part of the user's body and the user's heart based on the calculated distance, and
correct the obtained biometric information based on the determined blood vessel length.

### Claim 2 (depends on 1)

The electronic device of claim 1, further comprising an output device,
wherein the instructions, when executed by the processor, cause the electronic device to output, in response to the signal, guide information for inducing to taking of a reference posture through the output device in order to calculate the distance between the part of the user's body and the user's heart, and
wherein the output device comprises at least one of a touch screen display or an audio module.

### Claim 3 (depends on 1)

The electronic device of claim 1, wherein the instructions, when executed by the processor, cause the electronic device to:
analyze the degree of deformation of a two-dimensional pattern projected onto the user using the depth sensor,
obtain a three-dimensional depth image of the user based on the analyzed degree of deformation, and
obtain depth information on a specific point of the user based on the obtained depth image.

### Claim 4 (depends on 3)

The electronic device of claim 3, wherein the instructions, when executed by the processor, cause the electronic device to determine, as the point corresponding to the user's heart, the biometric reference point based on the obtained depth information on the specific point of the user.

### Claim 5 (depends on 1)

The electronic device of claim 1, wherein the memory is configured to store authentication information of the user, and
wherein the instructions, when executed by the processor, cause the electronic device to:
determine, as the point corresponding to the user's heart, the biometric reference point based on the stored authentication information of the user, and
calculate the distance between the part of the user's body and the user's heart based on the authentication information.

### Claim 6 (depends on 1)

The electronic device of claim 1, wherein the memory is configured to store the biometric information, and
wherein the instructions, when executed by the processor, cause the electronic device to:
correct the stored biometric information into the obtained biometric information based on the determined blood vessel length.

### Claim 7 (depends on 1)

The electronic device of claim 1, further comprising a wireless communication circuit,
wherein the instructions, when executed by the processor, cause the electronic device to transmit the calculated distance between the part of the user's body and the user's heart to an external electronic device through the wireless communication circuit.

### Claim 8 (depends on 1)

The electronic device of claim 1,
wherein the part of the user's body comprises at least one of the user's finger or wrist,
and
wherein the biometric information comprises at least one of blood pressure information or blood sugar information.

### Claim 9

A method of an electronic device, the method comprising:
detecting a signal for measuring biometric information,
obtaining, in response to the signal, depth information of a user of the electronic device from a depth sensor, wherein the depth information includes information for at least one of a location of a face, eyes, nose, mouth, or upper body of the user;
determining, as a point corresponding to the user's heart, a biometric reference point identified based on the obtained depth information;
obtaining the biometric information of the user's heart from a biometric sensor based on a part of the user's body being in contact with the biometric sensor;
calculating, using the depth sensor, a distance between the part of the user's body in contact with the biometric sensor and the user's heart;
determining a blood vessel length between the part of the user's body and the user's heart based on the calculated distance; and
correcting the obtained biometric information based on the determined blood vessel length.

### Claim 10 (depends on 9)

The method of claim 9, further comprising outputting, in response to the signal, guide information for inducing to taking of a reference posture through an output device in order to calculate the distance between the part of the user's body and the user's heart.

### Claim 11 (depends on 9)

The method of claim 9, wherein the obtaining depth information of the user of the electronic device comprises:
analyzing the degree of deformation of a two-dimensional pattern projected onto the user using the depth sensor;
obtaining a three-dimensional depth image of the user based on the analyzed degree of deformation; and
obtaining depth information on a specific point of the user based on the obtained depth image,
wherein the determining the biometric reference point comprises determining the biometric reference point based on the obtained depth information on the specific point of the user.

### Claim 12 (depends on 9)

The method of claim 9, wherein the calculating the distance comprises calculating the distance between the part of the user's body and the user's heart based on user authentication information stored in a memory, when authentication information of the user is stored in the memory, and
wherein the correcting the biometric information comprises correcting biometric information stored in the memory into the obtained biometric information based on the determined blood vessel length.