Portable electronic device
First Claim
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1. A portable electronic device comprising:
- a main body which is changeable between a first state where the main body is able to generate a first electromagnetic wave at a first intensity or more, and a second state where the main body is unable to generate the first electromagnetic wave at the first intensity or more;
a detector configured to detect a second electromagnetic wave having a frequency different from that of the first electromagnetic wave; and
a controller configured to set the main body at the second state on the basis of detection by the detector;
wherein the controller comprises a comparator configured to compare a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value, and a control signal generator configured to generate a control signal in accordance with a comparison result obtained by the comparator;
wherein the comparator is configured to output a detection signal when the detection value is larger than the threshold value, and the control signal generator is configured to be triggered at a rising edge of the detection signal and to invert its own output to be the control signal.
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Abstract
A portable electronic device includes a transmitting circuit, an X-ray detector, and a controller. The transmitting circuit includes a power amplifier for amplifying radio waves. The detector is arranged to detect X-rays radiated from an installation arranged on a passageway to an area where radiation of electromagnetic waves is restricted. When X-rays with a certain intensity or more are detected by the detector, a controller recognizes that the device is about to enter the area, and reduce the gain of the power amplifier, so that the transmitting circuit is set to be unable to radiate radio waves.
17 Citations
24 Claims
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1. A portable electronic device comprising:
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a main body which is changeable between a first state where the main body is able to generate a first electromagnetic wave at a first intensity or more, and a second state where the main body is unable to generate the first electromagnetic wave at the first intensity or more;
a detector configured to detect a second electromagnetic wave having a frequency different from that of the first electromagnetic wave; and
a controller configured to set the main body at the second state on the basis of detection by the detector;
wherein the controller comprises a comparator configured to compare a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value, and a control signal generator configured to generate a control signal in accordance with a comparison result obtained by the comparator;
wherein the comparator is configured to output a detection signal when the detection value is larger than the threshold value, and the control signal generator is configured to be triggered at a rising edge of the detection signal and to invert its own output to be the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A portable electronic device having a communicating unit for communicating with another device by using an electro magnetic wave, comprising:
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a main body which is changeable between a first state where the main body is able to generate a first electromagnetic wave at a first intensity or more, and a second state where the main body is unable to generate the first electromagnetic wave at the first intensity or more;
a detector configured to detect a second electromagnetic wave radiated from an installation arranged on a passageway to an area where radiation of electromagnetic waves is restricted, the second electromagnetic wave having a frequency different from that of the first electromagnetic wave;
a controller configured to set the main body at the second state on the basis of detection by the detector;
wherein the controller comprises a comparator configured to compare a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value, and a control signal generator configured to generate a control signal in accordance with a comparison result obtained by the comparator;
wherein the comparator is configured to output a detection signal when the detection value is larger than the threshold value, and the control signal generator is configured to be triggered at a rising edge of the detection signal and to invert its own output to be the control signal. - View Dependent Claims (15, 16, 17)
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18. A portable electronic device comprising:
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an antenna;
a transceiver coupled to the antenna and configured to output a first radio wave of a predetermined intensity through the antenna for communication; and
a detector configured to detect a second radio wave and output a control signal so as to reduce the intensity of the first radio wave;
wherein said detector comprises;
a controller comprising a comparator configured to compare a detection value of the second radio wave detected by the detector with a predetermined threshold value, and a control signal generator configured to generate a control signal in accordance with a comparison result obtained by the comparator;
wherein the comparator is configured to output a detection signal when the detection value is larger than the threshold value, and the control signal generator is configured to be triggered at a rising edge of the detection signal and to invert its own output to be the control signal.
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19. A portable electronic device comprising:
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means for communicating with another device by using a first radio wave of a predetermined intensity;
means for detecting a second radio wave; and
means for reducing the intensity of the first radio wave on the basis of detection of the second radio wave;
wherein said means for reducing comprises;
a controller comprising a comparator configured to compare a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value, and a control signal generator configured to generate a control signal in accordance with a comparison result obtained by the comparator;
wherein the comparator is configured to output a detection signal when the detection value is larger than the threshold value, and the control signal generator is configured to be triggered at a rising edge of the detection signal and to invert its own output to be the control signal.
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20. A method of controlling a portable electronic device including a main body which is changeable between a first state where the main body is able to generate a first electromagnetic wave at a first intensity or more, and a second state where the main body is unable to generate the first electromagnetic wave at the first intensity or more, the method comprising the steps of:
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detecting by a detector a second electromagnetic wave radiated from an installation arranged on a passageway to an area where radiation of electromagnetic waves is restricted, the second electromagnetic wave having a frequency different from that of the first electromagnetic wave; and
causing a controller to set the main body at the second state on the basis of detection by the detector;
wherein the causing a controller step further comprises the steps of;
comparing a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value, generating a control signal in accordance with a comparison result obtained by the comparator by generating an output triggered at a rising edge of a detection signal and inverting said output; and
outputting the detection signal when the detection value is larger than the threshold value. - View Dependent Claims (21, 22, 23)
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24. A method for changing a radio intensity of a portable electric device, comprising the steps of:
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communicating with another device by using a first radio wave of a predetermined intensity;
detecting a second radio wave; and
reducing the intensity of the first radio wave on the basis of detection of the second radio wave;
wherein the reducing the intensity step further comprises the steps of;
comparing a detection value of the second electromagnetic wave detected by the detector with a predetermined threshold value;
generating a control signal in accordance with a comparison result obtained by the comparator by generating an output triggered at a rising edge of a detection signal and inverting said output; and
outputting the detection signal when the detection value is larger than the threshold value.
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Specification