Portable radio telephone with power controller and method of controlling the same
First Claim
1. A portable radio telephone comprising:
- (a) a radio section for receiving an input radio signal and/or transmitting an output radio signal;
(b) a power supply controller for controlling supply of electric power to the radio section responsive to reception of a power-off signal;
the power-off signal being transmitted from a power-off signal transmitter provided in a prohibited area where use of a portable radio telephone is prohibited; and
(c) a power-off signal sensor for sensing reception of the power-off signal to notify the power supply controller of reception of the power-off signal;
wherein when the power-off signal sensor senses reception of the power-off signal, the power supply controller stops supply of electric power to the radio section while keeping additional built-in functions other than communication function operable;
and wherein when the power-oft signal sensor does not sense reception of the power-off signal, the power supply controller continues supply of electric power to the radio section.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable radio telephone is provided, which turns off or on automatically the communication function when the user enters a prohibited area or exits from the area, respectively, and at the same time, the built-in additional convenient functions are kept operable even after the communication function is turned off. The telephone comprises: (a) a radio section for receiving an input radio signal and/or transmitting an output radio signal; (b) a power supply controller for controlling supply of electric power to the radio section responsive to reception of a power-off signal; the power-off signal being transmitted from a power-off signal transmitter provided in a prohibited area where use of a portable radio telephone is prohibited; and (c) a power-off signal sensor for sensing reception of the power-off signal to notify the power supply controller of reception of the power-off signal. When the power-off signal sensor senses reception of the power-off signal, the power supply controller stops supply of electric power to the radio section while keeping additional built-in functions other than communication function operable. When the power-off signal sensor does not sense reception of the power-off signal, the power supply controller continues supply of electric power to the radio section.
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Citations
18 Claims
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1. A portable radio telephone comprising:
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(a) a radio section for receiving an input radio signal and/or transmitting an output radio signal;
(b) a power supply controller for controlling supply of electric power to the radio section responsive to reception of a power-off signal;
the power-off signal being transmitted from a power-off signal transmitter provided in a prohibited area where use of a portable radio telephone is prohibited; and
(c) a power-off signal sensor for sensing reception of the power-off signal to notify the power supply controller of reception of the power-off signal;
wherein when the power-off signal sensor senses reception of the power-off signal, the power supply controller stops supply of electric power to the radio section while keeping additional built-in functions other than communication function operable;
and wherein when the power-oft signal sensor does not sense reception of the power-off signal, the power supply controller continues supply of electric power to the radio section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling a portable radio telephone, comprising the steps of:
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(a) providing a power-off signal transmitter for transmitting a power-off signal in a prohibited area where use of a portable radio telephone is prohibited;
(b) providing a power-off signal sensor for sensing reception of the power-off signal on a portable radio telephone;
the telephone having a radio section for receiving an input radio signal and/or transmitting an output radio signal;
(c) judging whether the power-off signal sensor senses reception of the power-off signal or not; and
(d) stopping supply of electric power to the radio section of the telephone while keeping additional built-in functions of the telephone other than communication function operable if the power-off signal sensor senses reception of the power-off signal in the step (c);
the supply of electric power to the radio section of the telephone being continued if reception of the power-off signal is not sensed in the step (c). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification