Apparatus for estimating biological-information and sensor for measuring multi-signal
An apparatus for estimating biological information may include a sensor configured to detect a first light signal and a second light signal from an object of a user and a processor configured to determine whether a condition for estimating biological information is satisfied based on the detected first light signal and estimate biological information based on the second light signal, wherein the sensor includes a force sensor configured to measure a force applied to the object when the object is in contact with a cover surface of the sensor.
1. An apparatus for estimating biological information, comprising:
a sensor configured to detect a first light signal and a second light signal that are reflected or scattered from a body part of a user; and
a processor configured to determine whether a condition for estimating the biological information is satisfied based on the first light signal, and in response to the biological information being satisfied, estimate the biological information based on the second light signal,
wherein the sensor comprises:
a cover surface configured to be in contact with the body part;
a first light emitter disposed on a first substrate and configured to emit a first light to the body part;
a second light emitter disposed on a second substrate and configured to emit a second light, the second substrate being disposed closer to the cover surface than to the first substrate;
a light detector configured to detect the first light signal from the first light that is emitted to and then scattered or reflected from the body part, and detect the second light signal from the second light that is emitted to and then scattered or reflected from the body part; and
a force sensor configured to measure a force applied to the body part when the body part is in contact with the cover surface, and
wherein the processor is further configured to provide a list of a plurality of different types of biological information to the user and control the second light emitter according to a driving condition of the second light emitter corresponding to a biological information type selected by the user from the list.
2. The apparatus of claim 1 , wherein the processor is further configured to obtain a contact image of the body part based on the first light signal, determine a contact state of the body part based on at least one of the contact image or the force measured by the force sensor, and determine whether the condition for estimating biological information is satisfied based on the determined contact state.
3. The apparatus of claim 2 , wherein based on the condition being determined to be not satisfied, the processor is further configured to guide the user to adjust the contact state.
4. The apparatus of claim 2 , wherein the processor is further configured to drive the first light emitter when the body part is in contact with the cover surface, and turn off the first light emitter and turn on the second light emitter when the contact state meets a condition for biological information estimation.
5. The apparatus of claim 1 , wherein when the second light signal is received by the light detector, the processor is further configured to determine whether the condition for estimating the biological information is satisfied based on a signal to noise ratio (SNR) of the received second light signal.
6. The apparatus of claim 5 , wherein based on the condition being determined to be not satisfied, the processor is further configured to drive the second light emitter to re-obtain the second light signal.
7. The apparatus of claim 1 , wherein when the body part is in contact with the cover surface and the force is measured by the force sensor, the processor is further configured to determine a type of the biological information to be estimated based on the measured force.
8. The apparatus of claim 7 , wherein the processor is further configured to control at least one of a wavelength, current intensity, or duration of the second light emitter according to the driving condition of the second light emitter corresponding to the determined type of the biological information.
9. The apparatus of claim 7 , further comprising a display configured to display a first graphical object representing a reference force for each of a plurality of different types of biological information and a second graphical object representing the force measured by the force sensor.
10. The apparatus of claim 1 , further comprising a display configured to display a first graphical object representing the plurality of different types of biological information and a second graphical object representing a reference force for the selected biological information type.
11. The apparatus of claim 1 , wherein the biological information is at least one of heart rate, oxygen saturation, respiration rate, triglyceride, blood pressure, or antioxidant index.
12. A sensor for measuring a multi-signal, the sensor comprising:
a cover surface configured to be in contact with an object;
a first light emitter disposed on a first substrate and configured to emit first light to the object;
a second light emitter disposed on a second substrate and configured to emit second light to the object;
the second substrate being disposed closer to the cover surface than to the first substrate;
a light detector configured to detect a first light signal from the first light that is emitted to and then scattered or reflected from the object, and detect a second light signal from the second light that is emitted to and then scattered or reflected from the object based on the second light; and
a force sensor configured to measure a force applied to the object when the object is in contact with the cover surface,
wherein the second substrate comprises a transmissive region at a center of the second substrate to guide the first light and the second light scattered or reflected from the object to be directed toward the light detector, and the second light emitter comprises a plurality of light sources arranged along an outer periphery of the transmissive region.
13. The sensor of claim 12 , wherein the first light and the second light have different wavelengths.
14. The sensor of claim 12 , further comprising a condenser configured to condense the first light and the second light scattered or reflected from the object in a direction toward the light detector.