Power supply apparatus for performing wireless communication between first circuit and second circuit insulated from first circuit, and image forming apparatus including power supply apparatus

Patent metadata

Field	Value
Publication number	US-12099322-B2
Application number	US-202117554997-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Jun 21, 2019
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A power supply apparatus includes a first circuit, a second circuit, an adjustment unit, a detection unit configured to detect a parameter, a first communication unit, a second communication unit configured to perform wireless communication with the first communication unit, and a control unit configured to control the adjustment unit, the detection result being transmitted from the first communication unit to the second communication unit by the wireless communication. The detection unit operates with power resulting from a voltage output from the control unit to the second communication unit. The first communication unit includes first wiring, the second communication unit includes second wiring, and the first wiring is disposed to not contact the second wiring. At least a part of a region surrounded by the first wiring and the detection unit overlaps a region surrounded by the second wiring and the control unit.

First claim

The invention claimed is:

1. A power supply apparatus comprising:
a first circuit connected to a predetermined power supply;
a second circuit insulated from the first circuit;
an adjustment unit included in the first circuit and configured to adjust power supplied from the predetermined power supply to a load connected to the first circuit;
a detection unit included in the first circuit and configured to detect a parameter related to the power supplied from the predetermined power supply to the load;
a first communication unit included in the first circuit and connected to the detection unit, the first communication unit including first wiring as a first antenna, the first wiring electrically connecting a first connection portion of the detection unit and a second connection portion of the detection unit;
a second communication unit included in the second circuit, and insulated from the first communication unit, the second communication unit including second wiring as a second antenna configured to perform wireless communication with the first antenna, the first wiring being disposed to not contact the second wiring; and
a control unit included in the second circuit and configured to control the adjustment unit based on a detection result of the detection unit, the second wiring electrically connecting a third connection portion of the control unit and a fourth connection portion of the control unit, the detection result being transmitted from the detection unit to the control unit by the wireless communication, the detection unit being configured to operate with power resulting from a voltage generated in the first communication unit due to a voltage output from the control unit to the second communication unit,
wherein at least a part of a region surrounded by the first wiring and the detection unit overlaps a region surrounded by the second wiring and the control unit in a case where a circuit substrate is seen along a direction perpendicular to a surface of the circuit substrate where the detection unit is disposed, and
wherein the second wiring is disposed on a second surface opposite from a first surface of the circuit substrate where the first wiring is disposed.

2. The power supply apparatus according to claim 1 , wherein at least a part of the first wiring and the second wiring is a wiring trace formed on the surface of the circuit substrate.

3. The power supply apparatus according to claim 1 , wherein wiring on the first surface of the circuit substrate is electrically connected to wiring on the second surface opposite from the first surface via an opening in the circuit substrate.

4. The power supply apparatus according to claim 1 , wherein the first communication unit and the second communication unit are configured to perform the wireless communication using near-field communication (NFC).

5. The power supply apparatus according to claim 1 , wherein the predetermined power supply is a commercial power source.

6. An image forming apparatus comprising:
the supply apparatus according to claim 1 ;
a heater serving as the load;
a second detection unit configured to detect a temperature of the heater;
a transfer unit configured to transfer a toner image to a sheet; and
a fixing unit configured to fix the toner image transferred to the sheet by the transfer unit to the sheet by using heat from the heater,
wherein the control unit is configured to control the power supplied to the heater so that a deviation between a target temperature of the heater and the temperature detected by the second detection unit decreases.

7. A power supply apparatus comprising:
a first circuit connected to a predetermined power supply;
a second circuit insulated from the first circuit;
an adjustment unit included in the first circuit and configured to adjust power supplied from the predetermined power supply to a load connected to the first circuit;
a detection unit included in the first circuit and configured to detect a parameter related to the power supplied from the predetermined power supply to the load;
a first communication unit included in the first circuit and connected to the detection unit, the first communication unit including first wiring as a first antenna, the first wiring electrically connecting a first connection portion of the detection unit and a second connection portion of the detection unit;
a second communication unit included in the second circuit, and insulated from the first communication unit, the second communication unit including second wiring as a second antenna configured to perform wireless communication with the first antenna, the first wiring being disposed to not contact the second wiring; and
a control unit included in the second circuit and configured to control the adjustment unit based on a detection result of the detection unit, the second wiring electrically connecting a third connection portion of the control unit and a fourth connection portion of the control unit, the detection result being transmitted from the detection unit to the control unit by the wireless communication, the detection unit being configured to operate with power resulting from a voltage generated in the first communication unit due to a voltage output from the control unit to the second communication unit,
wherein at least a part of a region surrounded by the first wiring and the detection unit overlaps a region surrounded by the second wiring and the control unit in a case where a circuit substrate is seen along a direction perpendicular to a surface of the circuit substrate where the detection unit is disposed, and
wherein the first wiring includes:
a first spiral portion spirally disposed on a first surface of the circuit substrate, and
a first wiring portion on a second surface opposite from the first surface, one end of the first spiral portion being connected to the first connection portion, the first wiring portion electrically connecting the other end of the first spiral portion to the second connection portion.

8. The power supply apparatus according to claim 7 , wherein the second wiring includes
a second spiral portion spirally disposed on the first surface, and
a second wiring portion on the second surface, one end of the second spiral portion being connected to the third connection portion, the second wiring portion electrically connecting the other end of the second spiral portion to the fourth connection portion.

9. The power supply apparatus according to claim 7 , wherein the second wiring includes
a second spiral portion spirally disposed on the second surface, and
a second wiring portion on the first surface, one end of the second spiral portion being connected to the third connection portion, the second wiring portion electrically connecting the other end of the second spiral portion to the fourth connection portion.

10. The power supply apparatus according to claim 7 , wherein at least a part of the first wiring and the second wiring is a wiring trace formed on the surface of the circuit substrate.

11. The power supply apparatus according to claim 7 , wherein wiring on the first surface of the circuit substrate is electrically connected to wiring on the second surface opposite from the first surface via an opening in the circuit substrate.

12. The power supply apparatus according to claim 7 , wherein the first communication unit and the second communication unit are configured to perform the wireless communication using near-field communication (NFC).

13. The power supply apparatus according to claim 7 , wherein the predetermined power supply is a commercial power source.

14. A communi

Assignees

• Canon Kk

Inventors

• Sakurai Hiroyuki

Classifications

• H04N1/00888

  Control thereof · CPC title

• G05F1/455 Primary

  with phase control · CPC title

• G03G15/20

  for fixing, e.g. by using heat · CPC title

• G03G15/80 Primary

  Details relating to power supplies, circuits boards, electrical connections · CPC title

• G03G15/2039

  with means for controlling the fixing temperature · CPC title