A wireless headset for use with a separate communications device, such as a cellular
telephone, includes automatic on/off capabilities to maximize battery life. By
detecting a user's interaction, such as picking up the headset or placing it upon
the user's body, the wireless headset automatically transitions from an inactive
state to an active state. Techniques for automatic headset enabling include but
are not limited to motion sensors, attitude or position sensors, proximity sensors,
and contact sensors. These techniques may be used individually or in any combination.
An internal timer allows the wireless headset to return to its inactive state a
defined interval after cessation of movement or removal of the wireless headset.
Including an optional sleep state further optimizes battery life. In the sleep
state, only a portion of the wireless headset circuitry is enabled. Rather than
transitioning from inactive to active, the headset transitions from inactive to
sleep. In sleep, the headset periodically monitors for a signal from the separate
communications device. Upon detection of such a signal, the wireless headset transitions
to its active state, thereby providing full functionality to the user.