Patent ID: 8913012

Claim:
An optical mouse configured to detect a physiological characteristic of a finger or a mouse displacement of the optical mouse with respect to a work surface, the optical mouse comprising: a first light source configured to emit light of a first wavelength to the finger and a second light source configured to emit light of a second wavelength to the finger; a light control unit configured to control the first and second light sources; at least one image sensor configured to capture reflected light from the finger to generate a plurality of first image frames associated with the finger corresponding to on-states of the first light source and a plurality of second image frames associated with the finger corresponding to on-states of the second light source, and capture reflected light from the work surface to generate a plurality of image frames associated with the work surface; and a processing unit configured to divide each of the first image frames into at least two parts and calculate an average brightness of each part; analyze the average brightness of the each part of the first image frames to obtain a first intensity variation; divide each of the second image frames into at least two parts and calculate an average brightness of each part; analyze the average brightness of the each part of the second image frames to obtain a second intensity variation; and calculate the physiological characteristic according to the first intensity variation and the second intensity variation.