| 摘要 |
The present invention relates to an information processing unit, such as a mobile phone, equipped with a fingerprint sensor and reconciles size reduction with operability at a high level. The present invention is provided, adjacent to a keypad, with a V-shaped groove which contains a first slope stretching away from the keypad and slanting downward and a second slope stretching further away from the keypad and slanting upward, where the V-shaped groove contains a fingerprint sweep sensor which detects a fingerprint on a finger moved along the first slope and the second slope. <IMAGE>
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