Apparatus and method for measuring bio-information

A method of measuring bio-information, the method comprising:

• emitting light to a first region and a second region of an object by a plurality of light sources;
• detecting a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and outputting a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal;
• correcting the first electrical signal based on the second electrical signal;
• and
• measuring bio-information based on the corrected first electrical signal.

A wearable device comprising:

• a main body;
• a strap connected to the main body and configured to fix the main body to an object;
• an optical apparatus disposed in the main body and configured to emit light to a first region and a second region of the object, detect a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal;
• and
• a processor disposed in the main body and configured to correct the first electrical signal based on the second electrical signal, and measure bio-information based on the corrected first electrical signal.

An apparatus to measure bio-information, the apparatus comprising:

• a first light source and a second light source configured to emit light to a first region and a second region of an object, respectively;
• a detector configured to detect a first scattered light signal reflected from the first region and a second scattered light signal reflected from the second region, and output a first electrical signal corresponding to the first scattered light signal and a second electrical signal corresponding to the second scattered light signal;
• and
• a processor configured to correct the first electrical signal based on the second electrical signal, and measure the bio-information based on the corrected first electrical signal,
• wherein the first region comprises a blood vessel region and the second region comprises a non-blood vessel region.