Power management scheme for portable data collection devices utilizing location and position sensors

摘要

A data collection device (DCD) is placed in a first low power mode after the DCD has been in a first predetermined position, and placed in a second low power mode after a first predetermined period of time. In another embodiment the DCD includes a wireless telephone, and a proximity sensor which detects when the DCD is close to a user's face, wherein the telephone is automatically put in a handset mode when the DCD is close to a user's face, and automatically put in a speakerphone mode when the DCD is not close to a user's face.

主权项

1. A device, comprising:
a main body having a front and a back; a touch screen on the front of the main body; an accelerometer within the main body for detecting movement and an orientation of the device; and a processor within the main body configured for: determining if the device is front down or back down; if the device is front down, placing the device in a first sleep state and then a second sleep state based on a time elapsed without detecting movement of the device or receiving input since the device was placed in the first sleep state; and if the device is back down, placing the device in the second sleep state and then a third sleep state based on a time elapsed without detecting movement of the device or receiving input since the device was placed in the second sleep state.