ELECTRONIC DEVICE, CHARGER, AND ELECTRONIC DEVICE CHARGING SYSTEM
2 Assignments
0 Petitions
Accused Products
Abstract
An object of the present invention is to provide an electronic device which is capable of conducting a proximity noncontact communication even if charging of a secondary battery is not fully completed and also whose secondary battery never falls into an overdischarge state during the proximity noncontact communication. An electronic device (2) employs a secondary battery (28), which is rechargeable by a charger (3) that gives a charge of electricity in a noncontact manner, as a power source, and is capable of conducting a proximity noncontact communication with the charger (3). The electronic device (2) repeats a charging process, in which this equipment charges the secondary battery (28) for a predetermined period (Tb1) by receiving a supply of an electric power from the charger (3) via a noncontact power-receiving secondary coil (22), and a communication process, in which this equipment conducts a data communication for a predetermined period (Ta1)) when a voltage of the secondary battery (28) at a time of charging start is below a predetermined value (Va), and also repeats a charging process, in which this equipment charges the secondary battery (28) for a predetermined period (Tb2) by receiving a supply of the electric power from the charger (3) via the noncontact power-receiving secondary coil (22), and a communication process, in which this equipment conducts the data communication for a predetermined period (Ta2)(>Ta1) when the voltage of the secondary battery (28) at a time of charging start is more than a predetermined value (Va).
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Citations
25 Claims
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1-13. -13. (canceled)
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14. An electronic device that employs a secondary battery, which is rechargeable by a charger, as a power source and is capable of conducting a proximity noncontact communication with the charger, the electronic device comprising:
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a power receiving coil that receives an electric power from the charger by electromagnetic induction; an antenna used for conducting the proximity noncontact communication; and a charging and communication controlling section that controls the charging and the proximity noncontact communication, wherein the secondary battery is charged with the received electric power; and wherein the charging and communication controlling section controls to execute; a first charging process of charging the secondary battery, then a first communicating process of conducting the proximity noncontact communication for a first variable time, then a second charging process of charging the secondary battery, and then a second communicating process of conducting the proximity noncontact communication for the first variable time; and wherein the first variable time is set to a first predetermined period when a voltage of the secondary battery is equal to or greater than a predetermined value, and is set to a second predetermined period which is shorter than the first predetermined period when the voltage of the secondary battery is smaller the predetermined value. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification