METHOD AND SYSTEM FOR OPERATING A PORTABLE ELECTRONIC DEVICE IN A POWER-LIMITED MANNER
First Claim
1. A method for managing power in a battery powered portable electronic device having a battery, comprising:
- receiving a request to initiate a power intensive operation;
checking a battery level;
initiating the power intensive operation when the battery level is greater than a first threshold level;
checking the battery level during the power intensive operation;
canceling the power intensive operation when the battery level in not sufficient to successfully complete the power intensive operation;
when the power intensive operation is cancelled and when the portable electronic device is coupled to an external power source, charging the battery from the external power supply until the battery level is greater than a second threshold level; and
re-initiating the power intensive operation.
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Abstract
Improved techniques to manage operation of a portable electronic device having a substantially depleted battery when power is available from an external, power-limited source are disclosed. In one embodiment of the invention, the substantially depleted battery can be initially charged while a power-intensive operation is delayed. Once the battery has adequate charge to assist the external, power-limited source in powering the portable electronic device, the power-intensive operation can be performed. In this manner, power consumption of a portable electronic device can be managed so that reliable operation is achieved without exceeding limits on power being drawn from an external, power-limited source.
128 Citations
24 Claims
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1. A method for managing power in a battery powered portable electronic device having a battery, comprising:
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receiving a request to initiate a power intensive operation; checking a battery level; initiating the power intensive operation when the battery level is greater than a first threshold level; checking the battery level during the power intensive operation; canceling the power intensive operation when the battery level in not sufficient to successfully complete the power intensive operation; when the power intensive operation is cancelled and when the portable electronic device is coupled to an external power source, charging the battery from the external power supply until the battery level is greater than a second threshold level; and re-initiating the power intensive operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power manager system included in a battery powered electronic device having a battery, comprising:
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a battery monitor coupled to the battery arranged to determine a battery level of the battery; and a processor coupled to the battery monitor arranged to; initiate a power intensive operation performed by the battery powered electronic device when the battery monitor determines that the battery level is greater than a first threshold value, periodically check the battery level during the power intensive operation, cancel the power intensive operation when the battery level in not sufficient to successfully complete the power intensive operation, and when the portable electronic device is connected to an external power supply, charge the battery until the battery level is greater than a second threshold value, and re-initiate the power intensive operation, otherwise post a notification of a low power indication, and shut down the portable electronic device. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A portable media player comprising:
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a battery; a processor; a media store for storing media items; a communication interface for interfacing with a host device having an external power supply via a cable that provides media data and power to the portable media player when the cable is connected between the media player and the host device; and a power manager for managing power in the portable media player, said power manager comprising; a battery monitor coupled to the battery and the processor arranged to determine a battery level of the battery, wherein when the processor; initiates a power intensive operation performed by the portable media player when the battery monitor determines that the battery level is greater than a first threshold value, periodically checks the battery level during the power intensive operation, cancels the power intensive operation when the battery level in not sufficient to successfully complete the power intensive operation, and when the portable media player is connected to the external power supply, charges the battery until the battery level is greater than a second threshold value, and re-initiates the power intensive operation, otherwise posts a notification of a low power indication, and shuts down the portable media player. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A non-transitory computer readable medium for storing a computer program executable by a processor for managing power in a battery powered portable electronic device having a battery, said computer program comprising:
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computer code for receiving a request to initiate a power intensive operation; computer code for checking a battery level; computer code for initiating the power intensive operation when the battery level is greater than a first threshold level; computer code for checking the battery level during the power intensive operation; computer code for canceling the power intensive operation when the battery level in not sufficient to successfully complete the power intensive operation; when the power intensive operation is cancelled, computer code for charging the battery until the battery level is greater than a second threshold level when the portable electronic device is coupled to an external power source; and computer code for re-initiating the power intensive operation. - View Dependent Claims (24)
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Specification