Biological information detecting device and electronic apparatus

• US 10,244,953 B2
• Filed: 03/23/2015
• Issued: 04/02/2019
• Est. Priority Date: 03/27/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Narusawa, Atsushi
• Primary Examiner(s): Carey, Michael J
• Application Number:
  US15/120,086
• Publication Number:
  US 20170112398A1
• Time in Patent Office: 1,471 Days
• Field of Search: 600300, 600301
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/02444 Details of sensor A61B5/02427 takes precedence
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
• CPC Class Codes: A61B 5/7214 using signal cancellation, e.g. based on input of two identical physiological sensors spaced apart, or based on two signals derived from the same sensor, for different optical wavelengths

Abstract

A biological information detecting device includes: a first light receiving portion and a second light receiving portion which receive light from a subject; a processing portion; and at least one light emitting portion (light emitting portion or the like) which emits light to the subject. When a distance between the light emitting portion and the first light receiving portion is set to L1 and a distance between the light emitting portion and the second light receiving portion is set to L2, L1<L2 is satisfied. The processing portion performs body motion noise reduction processing that reduces a body motion noise of a first detection signal which is detected by the first light receiving portion based on a second detection signal which is detected by the second light receiving portion, and calculates biological information based on the first detection signal after the body motion noise reduction processing.

Claims

1. A biological information detecting device comprising:

a first light detector which receives light from a subject;

a second light detector which receives light from the subject;

a processing portion;

at least one light emitting portion which emits light to the subject; and

a light-transmissive member which is provided at a position closer to the subject than the first light detector and the second light detector, through which light from the subject is transmitted, and which applies a pressing force by being brought into contact with the subject at a time of detecting the biological information of the subject,

wherein in a direction from the biological information detecting device to the subject, when a height of the light-transmissive member at a position or in a region corresponding to the first light detector is set to h1 and a height of the light-transmissive member at a position or in a region corresponding to the second light detector is set to h2, h1>

h2 is satisfied,

wherein when a distance between the light emitting portion and the first light detector is set to L1 and a distance between the light emitting portion and the second light detector is set to L2, L1<

L2 is satisfied,

wherein the processing portion performs first body motion noise reduction processing that reduces a body motion noise of a first detection signal which is detected by the first light detector based on a second detection signal which is detected by the second light detector, and

wherein the processing portion calculates biological information based on the first detection signal after the first body motion noise reduction processing.

2. The biological information detecting device according to claim 1, further comprising:

a motion sensor,

wherein the processing portion performs second body motion noise reduction processing that reduces the body motion noise of the first detection signal based on a detection signal from the motion sensor.

3. The biological information detecting device according to claim 2,

wherein the processing portion performs the first body motion noise reduction processing with respect to the first detection signal based on the second detection signal and the second body motion noise reduction processing with respect to the signal after the first body motion noise reduction processing based on the detection signal from the motion sensor.

4. The biological information detecting device according to claim 1,

wherein the height h1 is a height of the light-transmissive member at a representative position of the first light detector, and

wherein the height h2 is a height of the light-transmissive member at a representative position of the second light detector.

5. The biological information detecting device according to claim 4,

wherein the representative position of the first light detector is a central position of the first light detector.

6. The biological information detecting device according to claim 4,

wherein the representative position of the second light detector is a central position of the second light detector.

7. The biological information detecting device according to claim 1,

wherein when a region including the first light detector and the light emitting portion in a plan view in which the light-transmissive member is viewed from a surface side coming into contact with the subject is set to a first region and a region including the second light detector and the light emitting portion in the plan view in which the light-transmissive member is viewed from the surface side coming into contact with the subject is set to a second region, the height h1 is an average height of the light-transmissive member in the first region and the height h2 is an average height of the light-transmissive member in the second region.

8. The biological information detecting device according to claim 1,

wherein the first light detector is disposed between the light emitting portion and the second light detector.

9. The biological information detecting device according to claim 8,

wherein the distance L1 between the light emitting portion and the first light detector and the distance L2 between the light emitting portion and the second light detector satisfies a relationship of L2>

2×

L1.

10. An electronic apparatus comprising the biological information detecting device according to claim 1.

11. An electronic apparatus comprising the biological information detecting device according to claim 2.

12. An electronic apparatus comprising the biological information detecting device according to claim 3.

13. An electronic apparatus comprising the biological information detecting device according to claim 4.

14. An electronic apparatus comprising the biological information detecting device according to claim 5.

15. An electronic apparatus comprising the biological information detecting device according to claim 6.

16. An electronic apparatus comprising the biological information detecting device according to claim 7.

17. An electronic apparatus comprising the biological information detecting device according to claim 8.

18. An electronic apparatus comprising the biological information detecting device according to claim 9.