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System with electronic device and extension device

  • US 9,939,849 B2
  • Filed: 08/06/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 10/30/2014
  • Status: Active Grant
First Claim
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1. A system comprising an electronic device and an extension device to which the electronic device is detachable from and attachable,wherein the electronic device comprises:

  • a first battery;

    a first connector to which a first alternating current (AC) adapter is connected;

    a first control integrated circuit (IC) comprising a first power supply controller; and

    a first charger IC configured to charge the first battery with power selectively supplied from either the first AC adapter or the extension device in response to an instruction from the first power supply controller, andthe extension device comprises;

    a second battery;

    a second connector to which a second AC adapter is connected;

    a second control IC comprising a second power supply controller; and

    a second charger IC configured to charge the second battery with power selectively supplied from either the second AC adapter or the electronic device in response to an instruction from the second power supply controller,wherein the extension device is configured such that when the extension device is mounted on the electronic device and the first AC adapter is connected to the first connector, the first power supply controller notifies the second power supply controller of supplying the extension device with power supplied from the first AC adapter,wherein the extension device is configured such that when the extension device is mounted on the electronic device and the first AC adapter is not connected to the first connecter, the first power supply controller inquires of the second power supply controller whether the second AC adapter is connected to the second connector, and requests, responsive to receiving a response which indicates that the second AC adapter is connected to the second connector, the second power supply controller to supply the electronic device with power supplied from the second AC adapter.

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