Systems and methods for determining and managing the power remaining in a handheld electronic device
First Claim
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1. A method comprising:
- measuring a battery voltage for a battery associated with an electronic device;
determining a current drawn by components of the electronic device;
determining a series resistance value for the electronic device; and
utilizing the values for battery voltage, current drawn by the components, and the series resistance to display the power remaining in the battery on a display of the electronic device, wherein the power remaining in the battery (VBATT REAL) is determined by performing the following calculation;
VBATT REAL=VBATT MEASURED+(Icompensated×
Rseries),where VBATT MEASURED is the measured battery voltage, Icompensated is the current drawn by the components, and Rseries is the series resistance.
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Abstract
Portable user devices, such as electronic book reader devices, may have a limited power supply. Power management techniques, such as current sensing, dynamic voltage measurement, and/or power state control may be used to manage power usage of such user devices.
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Citations
10 Claims
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1. A method comprising:
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measuring a battery voltage for a battery associated with an electronic device; determining a current drawn by components of the electronic device; determining a series resistance value for the electronic device; and utilizing the values for battery voltage, current drawn by the components, and the series resistance to display the power remaining in the battery on a display of the electronic device, wherein the power remaining in the battery (VBATT REAL) is determined by performing the following calculation;
VBATT REAL=VBATT MEASURED+(Icompensated×
Rseries),where VBATT MEASURED is the measured battery voltage, Icompensated is the current drawn by the components, and Rseries is the series resistance. - View Dependent Claims (2, 3)
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4. An apparatus comprising:
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a module for sensing a battery voltage and for converting the voltage signal from analog to digital form; a module to adjust the voltage signal to prevent the voltage signal from falling below a threshold value to determine an adjusted battery voltage (VBATT REAL) utilizing the following equation;
VBATT REAL=VBATT MEASURED+(Icompensated×
Rseries); anda module to display the adjusted battery voltage (VBATT REAL) on a display of the apparatus. - View Dependent Claims (5, 6, 7, 8)
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9. A method comprising:
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measuring battery voltage (VBATT MEASURED) of a battery associated with an electronic device; determining a value for the current (Icompensated) drawn by components of the device; determining a series resistance value (Rseries) associated with the battery; determining an adjusted battery voltage (VBATT REAL) utilizing the following equation;
VBATT REAL=VBATT MEASURED+(Icompensated×
Rseries); anddisplaying the adjusted battery voltage (VBATT REAL) on a display of the electronic device. - View Dependent Claims (10)
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Specification