Electronic device and method for providing personalized biometric information based on biometric signal using same

1. An electronic device comprising:

a sensor module;

a memory; and

at least one processor electrically connected to the sensor module and the memory,

wherein the at least one processor is configured to:

obtain at least one biometric signal from the sensor module during a predetermined time interval,

identify an activity state of a user based on the obtained at least one biometric signal,

obtain a candidate reference value for each of the at least one biometric signal using a representative value for each of the at least one biometric signal obtained based on identifying the activity state of the user as a first state, wherein the representative value is based on at least one biometric signal obtained during the predetermined time interval after identifying the activity state of the user as the first state,

identify a specific candidate reference value satisfying a predetermined condition of the obtained candidate reference value for each of the at least one biometric signal as a first reference value for a corresponding biometric signal, and

update a second reference value previously configured for the corresponding biometric signal based on the first reference value.

2. The electronic device of claim 1 ,

wherein the sensor module comprises at least one of an acceleration sensor or a photoplethysmography (PPG) sensor, and

wherein the at least one processor is further configured to:

analyze a signal for motion of the electronic device obtained from the acceleration sensor, and a change value of the at least one biometric signal obtained from the PPG sensor, and

in case no motion of the electronic device is detected and in case the change value of the at least one biometric signal is maintained for a predetermined period of time as a result of the analysis, determine that the user is in a second state.

3. The electronic device of claim 2 , wherein the at least one processor is further configured to:

determine that the user is in the first state, in case the change value of the at least one biometric signal does not exceed a predetermined value after determining that the user is in the second state, and in case the state in which the change value of the at least one biometric signal does not exceed the predetermined value is maintained for the predetermined period of time.

4. The electronic device of claim 1 , wherein the at least one processor is further configured to store the obtained at least one biometric signal in the memory in case the user is in the first state.

5. The electronic device of claim 4 , wherein the at least one processor is further configured to produce a histogram for each of the at least one biometric signal based on the at least one biometric signal.

6. The electronic device of claim 5 , wherein the predetermined condition comprises at least one of the histogram or external information.

7. The electronic device of claim 6 , further comprising:

a wireless communication circuit,

wherein the at least one processor is further configured to receive the external information through the wireless communication circuit, and

wherein the external information includes demographic information comprising at least one of gender, age, climate, or race.

8. The electronic device of claim 6 , wherein the at least one processor is further configured to:

obtain the candidate reference value included within a specific range as the first reference value for the corresponding biometric signal.

9. The electronic device of claim 5 , wherein the histogram for each of the at least one biometric signal includes a histogram of accumulated data for each of the at least one biometric signal obtained for a predetermined period of time.

10. The electronic device of claim 1 , wherein the at least one processor is further configured to:

compare the obtained at least one biometric signal with the updated second reference value; and

provide information related to a biometric state of the user determined based on the comparison result.

11. The electronic device of claim 10 ,

wherein the biometric state of the user comprises a stress level, and

wherein the at least one processor is further configured to provide the information related to the stress level in a form of at least one of a message, a pop-up window, or a sound.

12. The electronic device of claim 2 ,

wherein the first state comprises a stable state of the user, and

wherein the second state comprises a static state of the user.

13. A method of providing personalized biometric information based on a biometric signal, the method comprising:

obtaining at least one biometric signal from a sensor module during a predetermined time interval;

identifying an activity state of a user based on the obtained at least one biometric signal;

obtaining a candidate reference value for each of the at least one biometric signal using a representative value for each of the at least one biometric signal obtained based on identifying the activity state of the user as a first state, wherein the representative value is based on at least one biometric signal obtained during the predetermined time interval after identifying the activity state of the user as the first state;

identifying a specific candidate reference value satisfying a predetermined condition of the obtained candidate reference value for each of the at least one biometric signal as a first reference value for a corresponding biometric signal; and

updating a second reference value previously configured for the corresponding biometric signal based on the first reference value.

14. The method of claim 13 , further comprising:

analyzing, if the user is in a second state after obtaining the at least one biometric signal, a signal for motion of an electronic device obtained from the sensor module, and a change value of the at least one biometric signal, and

in case no motion of the electronic device is detected and in case the change value of the at least one biometric signal is maintained for a predetermined period of time as a result of the analysis, determining that the user is in the second state.

15. The method of claim 14 , wherein the determining of whether the user is in the first state comprises determining that the user is in the first state, in case the change value of the at least one biometric signal does not exceed a predetermined value after determining that the user is in the second state, and in case the state in which the change value of the at least one biometric signal does not exceed the predetermined value is maintained for the predetermined period of time.

16. The method of claim 13 , further comprising:

storing the obtained at least one biometric signal in a memory in case the user is in the first state.

17. The method of claim 16 , further comprising:

producing a histogram for each of the at least one biometric signal based on the at least one biometric signal,

wherein the histogram for each of the at least one biometric signal includes a histogram of accumulated data for each of the at least one biometric signal obtained for a predetermined period of time, and

wherein the predetermined condition comprises at least one of the histogram or external information.

18. The method of claim 17 , further comprising:

receiving the external information through a wireless communication circuit,

wherein the external information includes demographic information comprising at least one of gender, age, climate, or race.

19. The method of claim 17 , wherein the obtaining of the candidate reference value as the first reference value comprises:

obtaining the candidate reference value included within a specific range as the first reference value for the corresponding biometric signal.

20. The method of claim 13 , further comprising:

comparing the at least one obtained biometric signal with the updated second reference value; and

providing information related to a biometric state of the user determined based on the comparison result.