US 10,379,874 B1Granted

Expedited resume process from low battery

AssigneeAmazon Technologies, Inc.

InventorsVidhyananth Ramasamy Venkatasamy, Haili Wang

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Abstract

Devices, systems and methods are disclosed for quickly readying a device when charging a dead battery. For example, a device may enter a hibernation mode when the battery becomes critically low and may resume normal operation from the hibernation mode when an external power source is connected to the device. While the battery is critically low but the device is connected to the external power source, the device may generate a visible indication, such as a watermark, and apply the watermark to content to allow a user to control the device while indicating to the user that the battery is critically low and should not be removed from the external power source. Thus, the device may reduce user-perceived latency from when the external power source is connected to when the device resumes system interactivity (e.g., being responsive to user input).

Claims23

Dependent claims

A computer-implemented method for controlling a device powered by a battery, the method comprising:

operating the device in an active mode;
displaying first content;
determining a charge level of the battery;
determining to enter a hibernation mode, the hibernation mode disabling a supply of power from the battery to volatile memory and consuming less power than the active mode;
storing operational data in solid-state storage, the operational data corresponding to device settings in the active mode;
entering the hibernation mode;
displaying second content indicating that the charge level is critically low;
determining, while the device is in the hibernation mode, that an external power source is connected to the device while the charge level is below a first threshold;
based at least in part on determining that the external power source is connected to the device while the charge level is below the first threshold:
loading the operational data from the solid-state storage,
displaying third content together with a watermark indicating that the charge level is below the first threshold, and
entering the active mode;
determining, while the device is operating in the active mode and the watermark is displayed, that the charge level is above the first threshold;
and
based at least in part on determining that the charge level is above the first threshold, displaying the third content without the watermark.

12 more elements

A computer-implemented method, comprising:

causing a device powered by a battery to transition to a first mode, including storing active data from volatile memory to nonvolatile memory and disabling a supply of power from the battery to the volatile memory;
determining, while the device is operating in the first mode, that an external power source is connected to the device while a charge level of the battery is below a first threshold;
based at least in part upon determining that the external power source is connected to the device while the charge level is below the first threshold:
retrieving the active data from the nonvolatile memory,
storing the active data in the volatile memory,
determining first display data corresponding to the active data,
displaying the first display data and a visible indication of a low battery condition, and
operating the device in a second mode in which more power is consumed than in the first mode;
determining, while the device is operating in the second mode and the visible indication is displayed, that the charge level is above the first threshold;
and
based at least in part on determining that the charge level is above the first threshold, displaying the first display data without the visible indication.

8 more elements

A device, comprising:

a battery,
at least one processor;
and
a memory device including instructions operable to be executed by the at least one processor to configure the device to:
transition to a first mode including storing active data from volatile memory to nonvolatile memory and disabling a supply of power from the battery to the volatile memory;
determine, while the device is operating in the first mode, that an external power source is connected to the device while a charge level of the battery is below a first threshold;
and
based at least in part upon determining that the external power source is connected to the device while the charge level of the battery is below the first threshold:
retrieve the active data from the nonvolatile memory,
store the active data in the volatile memory,
determine first display data corresponding to the active data,
display the first display data and a visible indication of a low battery condition, and
operate the device in a second mode in which more power is consumed than in the first mode;
determine, while the device is operating in the second mode and the visible indication is displayed, that the charge level is above the first threshold;
and
based at least in part on determining that the charge level is above the first threshold, display the first display data without the visible indication.

13 more elements

Dependencies are inferred from the claim text.