Contactless battery charging device and process
First Claim
1. A process of recharging a battery (19) in a portable object (1) communicating with a reader establishing communication over a modulated electromagnetic field that further enables powering of the portable object, the portable object furthermore having a rechargeable battery the process comprising:
- operating the portable object to send at least one waiting message to the reader, the waiting message telling the reader a waiting time (WTXM) before the next message; and
operating the portable object to use the energy of the electromagnetic field to recharge the battery during the waiting time.
3 Assignments
0 Petitions
Accused Products
Abstract
To recharge the battery of a portable object communicating with a reader establishing communication over a modulated electromagneticfield, a recharging process is proposed. The portable object sends at least one waiting message to the reader. The said waiting message tells the reader a waiting time WTXM before the next message. The portable object uses energy from the electromagnetic field to recharge its battery during the waiting period.
11 Citations
11 Claims
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1. A process of recharging a battery (19) in a portable object (1) communicating with a reader establishing communication over a modulated electromagnetic field that further enables powering of the portable object, the portable object furthermore having a rechargeable battery the process comprising:
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operating the portable object to send at least one waiting message to the reader, the waiting message telling the reader a waiting time (WTXM) before the next message; and operating the portable object to use the energy of the electromagnetic field to recharge the battery during the waiting time. - View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. A portable object (1) communicating over a modulated electromagnetic field with a reader, the portable object comprising:
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a means of recovering energy (18) from the electromagnetic field; means of communication (11) in order to demodulate and modulate messages over the electromagnetic field; means of processing (10); a battery (19) allowing the means of processing to operate outside the electromagnetic field; a means of recharging the battery during which the means of processing (19) sends (209) at least one waiting message to the reader, the said waiting message telling the reader a waiting time before the next message; and means whereby the portable object uses the energy of the electromagnetic field to recharge the battery during the waiting time. - View Dependent Claims (8)
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10. A portable object communicating over a modulated electromagnetic field with a reader, the portable object comprising:
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an electromagnetic-field energy-receiving circuit; a battery allowing the means of processing to operate outside the electromagnetic field; a power supply circuit connected to the electromagnetic-field energy-receiving circuit and connected to the battery; a processor connected to the power supply circuit operable to direct the power supply circuit to cause energy received from the electromagnetic-field energy-receiving circuit to be used to recharge the battery during a recharging period defined by a waiting period transmitted by the processor to the reader, the said waiting message telling the reader a waiting time before the next message. - View Dependent Claims (11)
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Specification