ELECTRONIC DEVICE AND PHOTOPLETHYSMOGRAPHY METHOD

• US 20150190077A1
• Filed: 12/30/2014
• Published: 07/09/2015
• Est. Priority Date: 01/07/2014
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Jongjin, HAN, Jooman, CHOI, Jongmin
• Application Number:
  US14/586,029
• Publication Number:
  US 20150190077A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 2560/0247 for compensation or correction of the measured physiological value
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/1032 Determining colour for diagnostic purposes measuring colour in general G01J3/46
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• 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 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence

Abstract

A photoplethysmography (PPG) method is provided. The PPG method includes performing at least one of PPG signal measurement and surrounding environment information sensing, and determining a characteristic of a light source for measuring a PPG signal based on at least one of the measured PPG signal or the sensed surrounding environment information.

Claims

1. A photoplethysmography (PPG) method comprising:

performing at least one of PPG signal measurement and surrounding environment information sensing; and

determining a characteristic of a light source for measuring a PPG signal based on at least one of the measured PPG signal or the sensed surrounding environment information.

2. The PPG method of claim 1, wherein the surrounding environment information sensing includes sensing at least one of a skin temperature of a user, a temperature of a surrounding environment, light of a surrounding environment, a movement of a user, or a skin color of a user.

3. The PPG method of claim 1, wherein the PPG signal measurement is performed based on a characteristic of a selected light source in response to at least one of initial setting, a measurement mode, and the sensed surrounding environment information.

4. The PPG method of claim 3, further comprising:

selecting one of a heart rate measurement mode and an oxygen saturation measurement mode as the measurement mode.

5. The PPG method of claim 1, wherein the determining of the characteristic of the light source includes determining at least one of a wavelength characteristic and a light quantity characteristic of the light source.

6. The PPG method of claim 5, wherein the determining of the characteristic of the light source includes:

determining whether the measured PPG signal is distorted; and

adjusting a wavelength characteristic of the light source when it is determined that the measured PPG signal is distorted.

7. The PPG method of claim 5, wherein the determining of the characteristic of the light source includes:

determining whether an intensity of the measured PPG signal is appropriate; and

adjusting a light quantity characteristic of the light source when it is determined that the intensity of the measured PPG signal is not appropriate.

8. The PPG method of claim 5, further comprising:

determining whether the measured PPG signal is distorted;

adjusting a wavelength characteristic of the light source when it is determined that the measured PPG signal is distorted;

determining whether an intensity of the measured PPG signal is appropriate when it is determined that the measured PPG signal is within a normal range; and

adjusting a light quantity characteristic of the light source when it is determined that the intensity of the measured PPG signal is not appropriate.

9. The PPG method of claim 5, further comprising

selecting a corresponding light source according to the determined wavelength characteristic of the light source.

10. The PPG method of claim 9, further comprising:

adjusting a light quantity of the selected light source according to the determined wavelength characteristic of the light source.

11. An electronic device comprising:

a plurality of light sources having different wavelength characteristics;

a photoplethysmography (PPG) signal detection unit configured to detect light, which is irradiated from at least one of the plurality of light sources, and passes through or is reflected from a user; and

a controller configured to detect a PPG signal from an output signal of the PPG signal detection unit and to select at least one of the plurality of light sources based on the detected PPG signal.

12. The electronic device of claim 11, further comprising:

a measurement mode selection unit configured to select any one of a heart rate measurement mode and an oxygen saturation measurement mode,

wherein the controller selects at least one of the plurality of light sources based on at least one of the detected PPG signal and a measurement mode selected by the measurement mode selection unit.

13. The electronic device of claim 11, further comprising:

a surrounding environment sensing unit configured to sense at least one of a skin temperature of a user, a temperature of a surrounding environment, light of a surrounding environment, a movement of a user, or a skin color of a user,

wherein the controller selects at least one of the plurality of light sources based on at least one of the detected PPG signal, the measurement mode, and the surrounding environment information sensed by the surrounding environment sensing unit.

14. The electronic device of claim 13, wherein the controller determines whether the detected PPG signal is distorted, and selects a light source having another wavelength characteristic when it is determined that the detected PPG signal is distorted.

15. The electronic device of claim 13, wherein the controller determines whether an intensity of the detected PPG signal is appropriate, and adjusts a light quantity of the selected light source when it is determined that the intensity of the detected PPG signal is not appropriate.

16. The electronic device of claim 13, wherein the controller determines whether the measured PPG signal is distorted, and selects a light source having another wavelength characteristic when it is determined that the detected PPG signal is distorted.

17. The electronic device of claim 16, wherein the controller determines whether an intensity of the detected PPG signal is appropriate when it is determined that the detected PPG signal is within a normal range, and adjusts a light quantity of the selected light source when it is determined that the intensity of the measured PPG signal is not appropriate.

18. A computer readable recording medium, in which a program for executing an operation performing at least one of photoplethysmography (PPG) signal measurement and surrounding environment information sensing, and determining a characteristic of a light source for the PPG signal measurement based on at least one of the measured PPG signal and the sensed surrounding environment information is recorded.