Electronic apparatus and system control method for the electronic apparatus
First Claim
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1. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
- battery capacity detection means for detecting a remaining capacity of the battery;
radio signal transmission means for transmitting a radio signal at one of a first output level and a second output level lower than the first output level; and
control means for switching the output level of the radio signal transmitted by the radio signal transmission means from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detection means becomes lower than a predetermined value.
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Abstract
When an automatic battery detector detects that the remaining capacity of a battery has become lower than a predetermined value, a central processing controller lengthens the continuous operation time by reducing power consumption. The central processing controller controls a radio communication device to switch the operation mode from class 2 to class 3. Class 2 provides a high output level, and class 3 provides a low output level. Alternatively or additionally, the central processing controller controls a D/A conversion amplifier circuit to turn off a Dolby system.
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Citations
27 Claims
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1. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
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battery capacity detection means for detecting a remaining capacity of the battery;
radio signal transmission means for transmitting a radio signal at one of a first output level and a second output level lower than the first output level; and
control means for switching the output level of the radio signal transmitted by the radio signal transmission means from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detection means becomes lower than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
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battery capacity detection means for detecting a remaining capacity of the battery;
audio data reproduction means for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality; and
control means for switching the sound quality of the audio data reproduced by the audio data reproduction means from the first sound quality to the second sound quality, when the remaining capacity of the battery detected by the battery capacity detection means becomes lower than a predetermined value. - View Dependent Claims (8, 9, 10, 11)
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12. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
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battery capacity detection means for detecting a remaining capacity of the battery;
radio signal transmission means for transmitting a radio signal at one of a first output level and a second output level lower than the first output level;
audio data reproduction means for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality;
first control means for switching the output level of the radio signal transmitted by the radio signal transmission means from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detection means becomes lower than a predetermined value;
second control means for switching the sound quality of the audio data reproduced by the audio data reproduction means from the first sound quality to the second sound quality, when the remaining capacity of the battery detected by the battery capacity detection means becomes lower than a predetermined value; and
setting means for independently selecting at least one of the first and second control means.
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13. An electronic apparatus powered by a battery and configured to perform radio communications with another apparatus, comprising:
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a battery capacity detector for detecting a remaining capacity of the battery;
a radio signal transmitter for transmitting a radio signal at one of a first output level and a second output level lower than the first output level; and
a control device for switching the output level of the radio signal transmitter from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detector becomes lower than a predetermined value. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
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a battery capacity detector for detecting a remaining capacity of the battery;
an audio data reproduction device for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality; and
a control device for switching the sound quality of the audio data reproduced by the audio data reproduction device from the first sound quality to the second sound quality, when the remaining capacity of the battery detected by the battery capacity detector becomes lower than a predetermined value. - View Dependent Claims (20, 21, 22, 23)
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24. An electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, comprising:
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a battery capacity detector for detecting a remaining capacity of the battery;
a radio signal transmitter for transmitting a radio signal at one of a first output level and a second output level lower than the first output level;
an audio data reproduction device for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality;
a first control device for switching the output level of the radio signal transmitter from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detector is lower than a predetermined value;
second control device for switching the sound quality of the audio data reproduced by the audio data reproduction device from the first sound quality to the second sound quality, when the remaining capacity of the battery detected by the battery capacity detector becomes lower than a predetermined value; and
a setting device for independently selecting at least one of the first and second control device.
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25. A system control method for an electronic apparatus which can be driven by a battery and comprises a radio signal transmitter for transmitting a radio signal at one of a first output level and a second output level lower than the first output level, said system control method comprising the steps of:
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detecting a remaining capacity of the battery; and
switching the output level of the radio signal transmitted by the radio signal transmitter from the first output level to the second output level, when the remaining capacity of the battery detected in the battery capacity detection step becomes lower than a predetermined value. - View Dependent Claims (26)
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27. A system control method for an electronic apparatus which can be powered by a battery and comprises an audio data reproduction device for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality, said system control method comprising the steps of:
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detecting a remaining capacity of the battery; and
switching the sound quality of the audio data reproduced by the audio data reproduction device from the first sound quality to the second sound quality, when the remaining capacity of the battery detected in the battery capacity detection step becomes lower than a predetermined value.
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Specification