Patent ID: 7731665

Claim:
An apparatus for measuring biological information comprising: an input unit configured to receive an input from a user for selecting each of a body fat measurement mode, a pulse measurement mode and a blood vessel aging degree measurement mode; a memory configured to store biological information of the user; an infrared ray transmission and reception unit configured to radiate infrared rays having a single wavelength, and measure an infrared absorbance of a certain portion of the user's body by analyzing a reflected amount of the radiated infrared rays; a controller configured to calculate each one of a body fat value, a pulse value and a blood vessel aging degree value based on the measured infrared absorbance and stored biological information according to the measurement mode selected via the input unit; a current/voltage conversion unit configured to convert a current signal provided by the infrared ray transmission and reception unit into a voltage signal; a low pass filter unit configured to filter the voltage signal to cancel radio frequency (RF) optical noise included in the voltage signal; an amplifying unit configured to amplify the filtered voltage signal; a high pass filter configured to filter direct current (DC) noise generated by a power source; and a display unit configured to display at least one of the calculated body fat value, pulse value and blood vessel aging degree value, wherein the single wavelength is the same in the body fat measurement mode, the pulse measurement mode and the blood vessel aging degree measurement mode.