| 摘要 |
A apparatus for sensing the presence of a mobile telephone within a holder for the telephone. A winding is located within either the telephone, the telephone's battery pack or a plug connected to the telephone. A magnetic element is disposed within a portion of the holder that is proximate to the winding when the telephone is present within the holder. Detection circuitry is coupled to the winding and detects, based on current flow through the winding, if the winding is in proximity to the magnetic element, which indicates that the telephone is present within the holder. The system may automatically enter a hands-free mode whenever the presence of the telephone within the holder is sensed. The magnetic element may be a transformer secondary to enable power to be delivered to other electronics within the holder, such as a light emitting element, whenever the telephone is present therein.
|
