Power supply apparatus

• US 9,948,130 B2
• Filed: 09/16/2015
• Issued: 04/17/2018
• Est. Priority Date: 09/22/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Aikawa, Iori, Nakano, Katsuya
• Primary Examiner(s): Fleming, Fritz M
• Assistant Examiner(s): Dhillon, Jagdeep
• Application Number:
  US14/856,494
• Publication Number:
  US 20160087452A1
• Time in Patent Office: 944 Days
• Field of Search: 307104, 307149, 307 66, 307 64, 307 82, 375135, 375137, 250395, 2503361, 370311, 370328, 370329-333, 370300-310, 713300, 320108, 320109, 701300
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

A power supply apparatus includes a power supply unit that wirelessly supplies power to an electronic apparatus, a communication unit that performs a wireless communication with the electronic apparatus, and a control unit that controls a timing for switching a communication process performed by the communication unit and a power supply process performed by the power supply unit.

Claims

1. A power supply apparatus comprising:

a power supply unit that wirelessly supplies power to an electronic apparatus;

a communication unit that performs a wireless communication with the electronic apparatus; and

a control unit that controls a timing for switching a communication process performed by the communication unit and a power supply process performed by the power supply unit,

wherein the control unit controls power output from the power supply unit by using data received from the electronic apparatus by the communication unit,

wherein the control unit has a first mode in which, after performing near field wireless communication with the electronic apparatus by the communication unit, the control unit performs first control which increases power output from the power supply unit, and second control which decreases power output from the power supply unit,

wherein the control unit controls the power supply unit such that a period during which a displacement of output power which increases in the first control changes from a predetermined first proportion to a predetermined second proportion falls within a predetermined first period,

wherein the control unit controls the power supply unit such that a period during which a displacement of output power which decreases in the second control changes from the predetermined second proportion to the predetermined first proportion falls within a predetermined second period, and

wherein the control unit controls the power supply unit such that a period during which power output from the power supply unit is a third period determined based on the received data.

2. The apparatus according to claim 1,

wherein the control unit monotonically increases power output from the power supply unit when the control unit perform the first control, and monotonically decreases power output from the power supply unit when the control unit performs the second control.

3. The apparatus according to claim 1,

wherein the control unit has a second mode in which, after performing a wireless communication with the electronic apparatus by the communication unit, the control unit limits power output from the power supply unit for at least a predetermined period,

wherein the control unit monotonically increases power output from the power supply unit when the control unit performs the first control, and monotonically decreases power output from the power supply unit when the control unit performs the second control,

wherein the control unit limits power output from the power supply unit again for at least the predetermined period.

4. The apparatus according to claim 1, wherein the third period is a period from a timing at which the displacement of output power in the first control changes to the predetermined first proportion to a timing at which the displacement of output power in the second control changes to the predetermined second proportion, and

wherein a difference between the third period and a predetermined power supply period falls within a fourth period.

5. The apparatus according to claim 1, wherein in the first control, the control unit performs control such that an overshoot which occurs in a case where power output from the power supply unit is monotonically increased falls within the first proportion of the displacement of output power in the first control.

6. The apparatus according to claim 1, wherein in the first control, the control unit performs control such that an overshoot which occurs in a case where power output from the power supply unit is monotonically increased falls within a period which falls within a predetermined third proportion of the displacement of output power in the first control.

7. The apparatus according to claim 3, further comprising:

a selection unit that selects whether to perform power supply in the first mode or the second mode,

wherein the selection unit selects the first mode when performing power supply to the electronic apparatus in a reader/writer mode, and the second mode when performing power supply to the electronic apparatus in a P2P mode.

8. The apparatus according to claim 1, further comprising:

a detection unit that detects an impedance in a case where power is output from the power supply unit,

wherein, in a case where power is output from the power supply unit, the control unit performs the second control if the detection unit detects a fluctuation in the impedance, which is not less than a predetermined value.

9. The apparatus according to claim 1, wherein the predetermined first proportion is 10%, the predetermined second proportion is 90%, and the predetermined third proportion is 5%.

10. A method for a power supply apparatus comprising:

wirelessly supplying power to an electronic apparatus;

performing a wireless communication with the electronic apparatus;

controlling a timing for switching a communication process performed by a communication unit and a power supply process performed by a power supply unit,

controlling output from the power supply apparatus by using data received from the electronic apparatus by the communication process,

after performing near field wireless communication with the electronic apparatus, performing first control which increases power output from the power supply apparatus and second control which decreases power output from the power supply apparatus,

controlling the power supply apparatus such that a period during which a displacement of output power which increases in the first control changes from a predetermined first proportion to a predetermined second proportion falls within a predetermined first period,

controlling the power supply apparatus such that a period during which a displacement of output power which decreases in the second control changes from the predetermined second proportion to the predetermined first proportion falls within a predetermined second period, and

controlling the power supply apparatus such that a period during which power output from the power supply apparatus is a third period determined based on the received data.

11. A non-transitory storage medium that stores a program for causing a power supply apparatus to execute a method, the method comprising:

wirelessly supplying power to an electronic apparatus;

performing a wireless communication with the electronic apparatus;

controlling a timing for switching a communication process performed by a communication unit and a power supply process performed by a power supply unit,

controlling output from the power supply apparatus by using data received from the electronic apparatus by the communication process,

after performing near field wireless communication with the electronic apparatus, performing first control which increases power output from the power supply apparatus and second control which decreases power output from the power supply apparatus,

controlling the power supply apparatus such that a period during which a displacement of output power which increases in the first control changes from a predetermined first proportion to a predetermined second proportion falls within a predetermined first period,

controlling the power supply apparatus such that a period during which a displacement of output power which decreases in the second control changes from the predetermined second proportion to the predetermined first proportion falls within a predetermined second period, and

controlling the power supply apparatus such that a period during which power output from the power supply apparatus is a third period determined based on the received data.