ELECTRONIC DEVICE

• US 20180097395A1
• Filed: 09/26/2017
• Published: 04/05/2018
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yoshida, Masashi
• Granted Patent: US 11,322,970 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

An electronic device includes a charging unit, a maintaining unit, and a control unit. The charging unit charges a battery device with power supplied from a power supply line of an external cable. The maintaining unit maintains a connected state to a predetermined voltage of a specific line of the external cable by using power supplied from the power supply line. The control unit controls the maintaining unit so that the connected state is maintained by the maintaining unit, in a case where the charging unit is charging the battery device with power supplied from the power supply line when the electronic device is set to a power-off state.

Claims

1. An electronic device comprising:

a charging unit that charges a battery device with power supplied from a power supply line of an external cable;

a maintaining unit that maintains a connected state to a predetermined voltage of a specific line of the external cable by using power supplied from the power supply line; and

a control unit that controls the maintaining unit so that the connected state is maintained by the maintaining unit, in a case where the charging unit is charging the battery device with power supplied from the power supply line when the electronic device is set to a power-off state.

2. The electronic device according to claim 1, wherein the specific line is a line used by an external apparatus to monitor a voltage which determines that the electronic device is connected via the external cable.

3. The electronic device according to claim 1, wherein the specific line is a signal line in the external cable.

4. The electronic device according to claim 1, wherein the specific line is connected to the predetermined voltage when the external cable is communicably connected by a specific communication mode.

5. The electronic device according to claim 1, further comprising:

a determination unit that determines whether an external apparatus connected to the external cable can supply power for charging,

wherein the control unit controls the maintaining unit so that the connected state is maintained by the maintaining unit, in a case in which the determination unit has determined that the external apparatus can supply power for charging.

6. The electronic device according to claim 1, wherein the control unit controls the maintaining unit so that the connected state is maintained by the maintaining unit, in a case in which the battery device is being charged by the charging unit.

7. The electronic device according to claim 1, wherein a process of setting the electronic device to the power-off state is started in response to a user instruction instructing the power of the electronic device to be turned off.

8. The electronic device according to claim 1, wherein the connected state to the predetermined voltage of the specific line is a connected state indicating that the external cable is communicably connected by a first communication mode, and

the control unit starts, when an external apparatus is communicably connected by a communication mode different from that of the first communication mode, a process of setting the electronic device to the power-off state after reconnecting to the external apparatus so as to be communicably connected to the external apparatus by the first communication mode.

9. The electronic device according to claim 1, wherein the connected state to the predetermined voltage of the specific line is a connected state which indicates that the external cable is communicably connected by a first communication mode, and

the control unit sets, when an external apparatus is communicably connected by a communication mode different from the first communication mode, the electronic device to the power-off state after displaying that the charging cannot be continued after the power of the electronic device has been turned off.

10. The electronic device according to claim 1, wherein the connected state to the predetermined voltage of the specific line is a connected state which indicates that the external cable is communicably connected. by a first communication mode, and

the control unit starts a process of setting the electronic device to the power-off state after the communication connection by the first communication mode has been established.

11. The electronic device according to claim 8, wherein the first communication mode is an FS (Full Speed.) mode of USB (Universal Serial Bus), and

the maintaining unit maintains a state in which a D+ line of the USB has been pulled up to the predetermined voltage.

12. The electronic device according to claim 8, wherein the first communication mode is an HS (High Speed) mode of USB (Universal Serial Bus), and

the maintaining unit maintains a state in which a D+ line and a D−

line of the USB have been pulled down to a ground level.