| 摘要 |
PROBLEM TO BE SOLVED: To provide a headset which provides energy saving. SOLUTION: The headset is provided with a power management unit 150 which is operable to reduce the power consumption of the headset when a user is not present. The power management unit 150 uses a capacitive sensing to detect the presence of the user. Capacitive sensing is advantageous since it provides a flexible and reliable sensor that can accurately detect the presence or absence of a user either by detecting user's proximity or user contact. Moreover. in various embodiments, the sensitivity of a capacitive sensor may be adjusted taking account of user's movement or changes in environmental conditions such as, for example, the presence of water, or sweat on the headset to further improve sensing reliability. Furthermore, user presence signals based on capacitive sensing are acted by the headset to control other functions or external devices. COPYRIGHT: (C)2007,JPO&INPIT
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