| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light source device having a wave length composition formed according to a user's age. <P>SOLUTION: A person authentication part 10 acquires the biometric information of a user and the key information. An age presumption part 12 stores the biometric information and the key information upon relating them previously to the user's birth date information, and presumes the current age of the user from the authenticated birth date of the user and the current date. A photo quantity proportion control part 14 adjusts the photo quantity proportion of a blue light source 20 according to the user's age, i.e. increases as the user grows old. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
