LIVING-BODY INFORMATION MEASURING DEVICE AND LIGHT-EMITTING ELEMENT

• US 20170273570A1
• Filed: 08/08/2016
• Published: 09/28/2017
• Est. Priority Date: 03/28/2016
• Status: Active Grant

• Current Assignee: Fujifilm Business Innovation Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: KOJIMA, Tomoaki, SAKAI, Kazuhiro, OZAWA, Hideaki, UMEKAWA, Hideyuki, AKAMATSU, Manabu
• Granted Patent: US 10,492,695 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: A61B 5/7257 using Fourier transforms

Abstract

A living-body information measuring device includes a first light-emitting unit that emits a single-mode laser beam, a second light-emitting unit that emits a multi-mode light beam or an LED light beam, a light-receiving element that receives reflected or transmitted light beams reflected or transmitted by a living body when the first light-emitting unit and the second light-emitting unit emit the beams toward the living body, a control unit that controls light-emission periods of the first light-emitting unit and the second light-emitting unit, and a measurement unit that measures plural types of living-body information about the living body by using each of the reflected or transmitted light beams that are successively received by the light-receiving element.

Claims

1. A living-body information measuring device comprising:

a first light-emitting unit that emits a single-mode laser beam;

a second light-emitting unit that emits a multi-mode light beam or an LED light beam;

a light-receiving element that receives reflected or transmitted light beams reflected or transmitted by a living body when the first light-emitting unit and the second light-emitting unit emit the beams toward the living body;

a control unit that controls light-emission periods of the first light-emitting unit and the second light-emitting unit; and

a measurement unit that measures a plurality of types of living-body information about the living body by using each of the reflected or transmitted light beams that are successively received by the light-receiving element.

2. The living-body information measuring device according to claim 1,

wherein the control unit controls the light-emission periods so that the light-emission period of the first light-emitting unit and the light-emission period of the second light-emitting unit do not overlap.

3. The living-body information measuring device according to claim 1,

wherein the measurement unit measures blood flow information and a plethysmogram of the living body as the living-body information.

4. The living-body information measuring device according to claim 1,

wherein the second light-emitting unit includes two light-emitting elements that emit light beams having different wavelengths, and

wherein the measurement unit measures blood flow information and oxygen saturation of the living body as the living-body information.

5. The living-body information measuring device according to claim 1, further comprising:

a gain-adjusting unit that performs gain adjustment so that a level of a light-receiving signal that corresponds to each of the light beams received by the light-receiving element falls within a specified range.

6. The living-body information measuring device according to claim 1,

wherein the first light-emitting unit and the second light-emitting unit are formed on the same semiconductor substrate.

7. The living-body information measuring device according to claim 1,

wherein each of the first light-emitting unit and the second light-emitting unit is a surface-emitting laser.

8. A light-emitting element comprising:

a first light-emitting unit that emits a single-mode laser beam; and

a second light-emitting unit that emits a multi-mode light beam or an LED light beam,

wherein the first light-emitting unit and the second light-emitting unit are formed on the same semiconductor substrate.

9. The light-emitting element according to claim 8,

wherein each of the first light-emitting unit and the second light-emitting unit is a surface-emitting laser.