Apparatus for obtaining biological information

An apparatus for obtaining bio information, the apparatus comprising:

• a first electrode portion comprising a first current electrode and a first voltage electrode, the first current electrode and the first voltage electrode being disposed on a front surface of the apparatus, and arranged to be simultaneously touchable by a single finger of a subject;
• a second electrode portion comprising a second current electrode and a second voltage electrode, the second current electrode and the second voltage being disposed on a rear surface of the apparatus, and arranged to contact a wrist of the subject;
• and
• a measuring circuit configured to measure a body fat of the subject by applying a current to the first and the second current electrodes and detecting a voltage at the first and the second voltage electrodes while the first current electrode and the first voltage electrode are in contact with the single finger and the second current electrode and the second voltage electrode are in contact with the wrist,
• wherein the first current electrode on the front surface and the second current electrode on the rear surface have a circular shape,
• wherein the first voltage electrode on the front surface and the second voltage electrode on the rear surface have a circular ring shape, and are disposed to surround a perimeter of the first current electrode and a perimeter of the second current electrode, respectively, and
• wherein the first voltage electrode on the front surface directly opposes the second voltage electrode on the rear surface and is electrically connected, through a body of the subject, to the second voltage electrode having the same circular ring shape as the first voltage electrode when a voltage measurement loop circuit is formed through the body of the subject, and the first current electrode on the front surface directly opposes the second current electrode on the rear surface and is electrically connected, through the body of the subject, to the second current electrode having the same circular shape as the first current electrode when a current measurement loop circuit is formed through the body of the subject, and
• wherein the first current electrode has an area greater than an area of the first voltage electrode, and the second current electrode has an area greater than an area of the second voltage electrode.