Video camera with low battery warning
First Claim
1. A video camera, comprising:
- a processor operable to obtain a capacity value of a battery by communicating over a communications line with a battery pack that contains the battery, the battery providing power to the video camera, the capacity value indicating a number of cell structures in the battery, to set a correction value based on the capacity value, to correct a low power warning voltage value by subtracting the correction value from the low power warning voltage value, to generate a low power warning when a detected battery voltage is less than or equal to the corrected low power warning voltage value, and to generate a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value; and
a display operable to display the low power warning or the residual power indication.
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Accused Products
Abstract
A video camera includes a processor that is operable to obtain a capacity value of a battery by communicating over a communications line with a battery pack that contains the battery and which provides power to the video camera. The capacity value indicates a number of cell structures in the battery. The processor is also operable to set a correction value based on the capacity value, to correct a low power warning voltage value by subtracting the correction value from the low power warning voltage value, to generate a low power warning when a detected battery voltage is less than or equal to the corrected low power warning voltage value, and to generate a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value. A display is operable to display the low power warning or the residual power indication.
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Citations
13 Claims
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1. A video camera, comprising:
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a processor operable to obtain a capacity value of a battery by communicating over a communications line with a battery pack that contains the battery, the battery providing power to the video camera, the capacity value indicating a number of cell structures in the battery, to set a correction value based on the capacity value, to correct a low power warning voltage value by subtracting the correction value from the low power warning voltage value, to generate a low power warning when a detected battery voltage is less than or equal to the corrected low power warning voltage value, and to generate a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value; and
a display operable to display the low power warning or the residual power indication. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A video system, comprising:
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a video camera body;
a battery pack including a battery having at least one battery cell; and
a communications line connected to said video camera body and said battery pack;
said video camera body including;
a processor operable to obtain a capacity value of said battery by communicating with said battery pack over said communications line, the capacity value indicating a number of cell structures in the battery, to set a correction value based on the capacity value, to correct a low power warning voltage value by subtracting the correction value from the low power warning voltage value, to generate a low power warning when a detected battery voltage is less than or equal to the corrected low power warning voltage value, and to generate a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value, and a display operable to display the low power warning or the residual power indication. - View Dependent Claims (9, 10, 11)
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12. A battery pack for a video system, said battery pack comprising:
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a cell structure section including at least one battery cell and having at least one stage;
a power terminal operable to supply power to a video camera body of the video system over a power source line;
a memory operable to store a capacity value of said battery, the capacity value indicating a number of battery cells in said battery;
a communications terminal operable to provide a connection to a communications line connected between said battery pack and the video camera body; and
a processor operable to provide the capacity value stored in said memory to the video camera body using said communications terminal and the communications line;
said video camera body thereby setting a correction value based on the provided capacity value, correcting a low power warning voltage value by subtracting the correction value from a low power warning voltage value, detecting a battery voltage of said at least one battery cell, generating a low power warning when the detected battery voltage is less than or equal to the corrected low power warning voltage value, generating a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value, and displaying the low power warning or the residual power indication. - View Dependent Claims (13)
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Specification