Patent ID: 7876929

Claim:
A personal identification device comprising: an infrared light source; a transmission light quantity control element array provided by a plurality of light transmission control elements for exercising control to transmit or block light radiated from said infrared light source to a living body; and a light receiving element array provided by a plurality of light receiving elements for receiving light radiated from the living body; wherein said infrared light source, said transmission light quantity control element array, and said light receiving element array are positioned on the same side of the living body; and control identification means for identifying a person in accordance with a combined image that is obtained by combining a first image with a second image, wherein said first image is obtained when said light receiving element array acquires light containing internal biometric feature information that is derived from the living body when said transmission light quantity control element array is controlled to radiate one region of the living body with light transmitted from said infrared light source; and wherein said second image is obtained when said light receiving element array acquires light containing internal biometric feature information that is derived from the living body when said transmission light quantity control element array is controlled to radiate another region of the living body with light transmitted from said infrared light source.