Cordless telephone apparatus
First Claim
1. A cordless telephone apparatus including a base unit and a portable unit for transferring information between the base and portable unit by radio communications, the portable unit being powered by a rechargeable secondary battery and further including an internal receiver operating in an intermittent receiving action, the portable unit comprising:
- detecting means for detecting when the secondary battery is being charged; and
switching means for switching the receiving action of the receiver to a continuous receiving action of continual power supply from an external power source, from the intermittent receiving action, when the secondary battery is being charged, as detected by the detecting means.
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Accused Products
Abstract
A cordless telephone includes a portable unit having chargeable secondary batteries as a power source in which to minimize the power consumption, signals are received intermittently to limit the operating time of the built-in receiver. The portable unit includes a detecting device for detecting the charging state of the secondary battery, and swtiching device for switching the receiving action of receiver to a continuous receiving action while the charging state of the secondary battery is being detected by the battery charging detecting device. Accordingly, the power source of the receiver, while the secondary batteries are being charged is fed from the power source for charging through the secondary batteries. Thus, the receiving action during this period may be set in continuous receiving action. Hence, it is possible to reply from the portable unit without delay to a call from a base unit during the charging.
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Citations
11 Claims
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1. A cordless telephone apparatus including a base unit and a portable unit for transferring information between the base and portable unit by radio communications, the portable unit being powered by a rechargeable secondary battery and further including an internal receiver operating in an intermittent receiving action, the portable unit comprising:
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detecting means for detecting when the secondary battery is being charged; and switching means for switching the receiving action of the receiver to a continuous receiving action of continual power supply from an external power source, from the intermittent receiving action, when the secondary battery is being charged, as detected by the detecting means.
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2. A cordless telephone apparatus including a base unit connected to a telephone line and a portable unit for transferring information with the base unit by radio communications, the portable unit including a secondary battery for supplying power thereto, the apparatus comprising:
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means associated with the base unit for generating a calling signal; the portable unit including a receiver for receiving the generated calling signal, said receiver being powered by the secondary battery; detecting means for detecting when the secondary battery is being charged; controlling means, responsive to an output from the detecting means, for controlling performance of a continuous receiving action of the receiver by continually supplying power to the receiver when the battery is being charged and for controlling performance of an intermittent receiving action of the receiver by intermittently supplying power from the secondary battery when the battery is not being charged. - View Dependent Claims (3, 4, 5)
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6. A cordless telephone apparatus including a base unit and a portable unit, the base unit being connected to telephone lines to receive communication signals and transmit a calling signal to the protable unit via radio communications, the portable unit comprising:
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receiving means for receiving the calling signal; rechargeable battery means, operatively connected to said receiving means, for intermittently supplying power, to said receiving means, during predetermined intervals of time; detection means, operatively connected to said rechargeable battery means, for detecting when the rechargeable battery means is being charged; switching means, operatively connected to said detection means and said receiving means, for switching the receiving means into a continuous receiving mode, where power is continuously supplied to the receiving means from an external power source, when the rechargeable battery means is being charged, as detected by the detection means. - View Dependent Claims (7, 8)
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9. A method of operating a portable telephone in a continuous receiving mode, wherein power is continuously supplied to the portable telephone, during charging of a rechargeable battery contained therein and operating the telephone in an intermittent receiving mode, wherein power is supplied during intermittent intervals to the portable telephone, when the rechargeable battery is not being charged, comprising the steps of :
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(a) charging the rechargeable battery through an external power source; (b) determining when the rechargeable battery is being charged; (c) switching the portable telephone to the continuous receiving mode when the rechargeable battery is being charged, based upon the determination of step (b); and (d) switching the portable telephone to the intermittent receiving mode when the rechargeable battery is not being charged, based upon the determination of step (b). - View Dependent Claims (10, 11)
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Specification