JP2017060262A - Power supply device and power reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device and a power reception device that can easily identify a position suitable for power supply.SOLUTION: A power supply device comprises: a top plate formed using an optically transparent member; a power supply unit that is provided on the back surface side of the top plate and performs non-contact power supply to a power reception unit of an electronic apparatus mounted on the front surface side of the top plate; a light emission unit that is provided on the back surface side of the top plate so as to be associated with the power supply unit; power supply state determination means for determining whether or not the power supply unit is in a power supply state; and control means that, when the power supply state determination means has determined that the power supply unit is in a non-power supply state, makes the light emission unit emit light.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a power feeding device and a power receiving device.

  In recent years, power feeding devices and power receiving devices using non-contact power feeding technology have appeared. Also, in the field of POS systems and the like, the use of non-contact power feeding technology is being promoted. For example, a power supply unit of a non-contact power supply method is installed on a part of the back side of a top plate such as a table, and a power reception unit of a method corresponding to an electronic device such as a printer placed on the surface of the top plate is mounted. Thereby, on the surface of the top plate, it is possible to supply power to the electronic device placed in an area where the power supply unit can supply power (area where power can be supplied) without contact. In this case, since the power cord is not necessary, the electronic device can be used at a relatively free position.

  However, if the area of the top plate is relatively large such as a table, there is a problem that it is difficult to know where the power supply area exists.

  The problem to be solved by the present invention is to provide a power feeding device and a power receiving device that can easily identify a position suitable for power feeding.

  The power supply apparatus according to the embodiment includes a top plate, a power supply unit, a light emitting unit, a power supply state determination unit, and a control unit. The top plate is formed of a light transmissive member. The power feeding unit is provided on the back side of the top plate, and performs non-contact power feeding to a power receiving unit of an electronic device placed on the top side of the top plate. The light emitting unit is provided on the back side of the top plate and associated with the power feeding unit. The power supply state determination unit determines whether the power supply unit is in a power supply state. A control means makes the said light emission part light-emit, when the said electric power feeding state determination means determines with a non-power feeding state.

FIG. 1 is a diagram schematically illustrating an example of the configuration of the contactless power feeding system according to the first embodiment. FIG. 2 is a diagram schematically illustrating the top surface of the top plate of the power feeding device illustrated in FIG. 1. FIG. 3 is a diagram schematically showing a cross-section A-A ′ of the power feeding device shown in FIG. 2. FIG. 4 is a diagram schematically illustrating an example of an electrical configuration of the power feeding device according to the first embodiment. FIG. 5 is a flowchart illustrating an example of a procedure of light emission control processing executed by the power supply apparatus according to the first embodiment. FIG. 6 is a diagram schematically illustrating an example of the electrical configuration of the electronic apparatus according to the second embodiment. FIG. 7 is a flowchart illustrating an example of a procedure of light emission control processing executed by the electronic device of the second embodiment.

  Hereinafter, embodiments of a power feeding device and a power receiving device will be described in detail with reference to the accompanying drawings. In addition, embodiment described below is one Embodiment of a power feeding apparatus and a power receiving apparatus, Comprising: The structure, a specification, etc. are not limited.

[First Embodiment]
FIG. 1 is a diagram schematically illustrating an example of the configuration of the contactless power feeding system according to the first embodiment. As shown in FIG. 1, the non-contact power feeding system includes a power feeding device 10 and various electronic devices 20. The power supply apparatus 10 is a table-shaped fixture such as a checkout counter. The power feeding device 10 includes a top plate 11 and a support 12 that supports the top plate 11. Further, the electronic device 20 corresponding to the power receiving device of the present embodiment is placed on the surface of the top plate 11 of the power feeding device 10.

  FIG. 2 is a diagram schematically illustrating the upper surface (front surface) of the top plate 11 of the power supply apparatus 10. FIG. 3 is a diagram schematically showing an A-A ′ cross section of the power feeding device 10 shown in FIG. 2. A power feeding unit 13 for performing power transmission in a non-contact manner is installed on a part of the back side of the top plate 11. The power supply unit 13 is a non-contact power supply unit that can perform power transmission without contact. The power feeding unit 13 forms a region where power can be fed (hereinafter, referred to as a power feedable area) at the position of the top plate 11 where the power feeding unit 13 is installed. When the electronic device 20 is placed in the power supply available area on the top plate 11, the power supply unit 13 supplies power to the electronic device 20 in a non-contact manner. The power transmission method of the power supply unit 13 is not particularly limited, and for example, an electromagnetic induction method, an electromagnetic field resonance method, a radio wave method, or the like may be used. Further, the number of power supply units 13 included in the power supply apparatus 10 is not limited to the illustrated example.

  Further, a light emitting unit 14 including a light emitting element, a light guide member, and the like is installed on the back surface of the top plate 11. The type of the light emitting element is not particularly limited, and for example, a point light source such as an LED (Light Emitting Diode) or a surface light source may be used.

  The light emitting unit 14 is provided in association with each of the power feeding units 13. Specifically, the light emitting unit 14 is provided in association with a power supplyable area formed by each power supply unit 13. For example, as shown in FIGS. 2 and 3, the light emitting unit 14 is installed so as to surround the power feeding unit 13. As another example, the light emitting unit 14 may be installed so as to cover the power feeding unit 13 when viewed from the surface of the top plate 11. When the power supply area is formed larger or smaller than the power supply unit 13, the light emitting unit 14 is provided at a position or region corresponding to the power supply area.

  Moreover, the top plate 11 shall be formed with the member (For example, insulators, such as glass and an acrylic material) which has a light transmittance and does not prevent the electric power feeding (power transmission) of the electric power feeding part 13. FIG. Furthermore, the top plate 11 is more preferably a member capable of diffusing light (for example, a milky white resin plate). In addition, in the top plate 11, it is good also as a structure which forms the area | region corresponding to the installation position of the electric power feeding part 13 and the light emission part 14 with said member.

  The power supply apparatus 10 includes a control unit 15 that controls operations of the power supply unit 13 and the light emitting unit 14 described above (see FIG. 4). In addition, the power supply device 10 includes a power supply unit (not shown) that supplies power to the power supply unit 13, the light emitting unit 14, the control unit 15, and the like.

  On the other hand, the electronic device 20 is an electronic device that receives electric power supplied in a non-contact manner from the power supply apparatus 10 (power supply unit 13) and operates based on the electric power. The electronic device 20 includes a power receiving unit that receives power transmitted from the power supply unit 13, a secondary battery that stores power received by the power receiving unit, an electric load unit that operates by power supplied from the power receiving unit or the secondary battery Etc. (both not shown). The device type of the electronic device 20 is not particularly limited, and may be, for example, a POS terminal, a printer, a code scanner, a display device, or the like. For example, when the electronic device 20 is a printer, the electrical load unit corresponds to a printer engine, a printer controller, or the like that realizes a printer function.

  When it is set as said structure, in the surface of the top plate 11, electric power supply in non-contact is attained by mounting the electronic device 20 in the electric power supply possible area. In this case, since the power cord is not necessary, the electronic device 20 can be used at a relatively free position (layout). In addition, when the electronic device 20 communicates with other devices wirelessly, a communication cable is not necessary, so the degree of freedom in layout is further increased.

  However, as in the power supply device 10 shown in FIG. 1, when the mounting area of the top plate 11 is relatively large with respect to the power supplyable area, there is a problem that it is difficult to know where the power supplyable area exists. Further, there is a problem that even if the electronic device 20 (power receiving unit) is shifted and placed with respect to the power supply unit 13, it is difficult for the user to recognize the state.

  Therefore, in the power supply apparatus 10 (control unit 15) of the present embodiment, by controlling the light emitting unit 14, the power supply available area and the state of power supply (power reception) are notified by light emission. Hereinafter, the electrical configuration of the power supply apparatus 10 will be described.

  FIG. 4 is a diagram schematically illustrating an example of the electrical configuration of the power supply apparatus 10. As shown in FIG. 4, the power feeding apparatus 10 includes a control unit 15 that performs light emission control of the light emitting unit 14 together with the power feeding unit 13 and the light emitting unit 14 described above.

  The control unit 15 has a computer configuration such as a processor (for example, CPU) and a memory (for example, ROM, RAM) (none of which is shown). The processor of the control unit 15 comprehensively controls the operation of the power supply apparatus 10 by executing various programs stored in the memory. In addition, the control unit 15 includes a power supply state determination unit 151, a positional deviation detection unit 152, a power reception side state acquisition unit 153, and a light emission control unit 154 as functional units. Note that the power supply state determination unit 151 and a part or all of these functional units may have a hardware configuration realized by a dedicated circuit or the like, or realized by the cooperation of the processor and various programs stored in the memory. It may be a software configuration.

  The power supply state determination unit 151 is a functional unit that determines the state of the power supply unit 13. Specifically, the power supply state determination unit 151 determines whether or not the power supply unit 13 is supplying power to supply power to the electronic device 20.

  The misregistration detection unit 152 detects misalignment between the power feeding unit 13 and the electronic device 20 (power receiving unit). Here, “position shift” means that the position is shifted from an arrangement position suitable for non-contact power feeding, and corresponds to, for example, the case where the electronic device 20 is placed out of the power feedable area. In the non-contact power feeding method using electromagnetic induction, it is known that the transmission efficiency is greatly deteriorated due to the positional deviation of the power receiving coil with respect to the power transmitting coil. Therefore, the misalignment detection unit 152 detects misalignment of the electronic device 20 with respect to the power supply unit 13 based on a change in mutual inductance, a decrease in charging efficiency, and the like. The detection method for misregistration is not particularly limited, and a publicly known / public technique can be used.

  The power receiving side state acquisition unit 153 is a functional unit that acquires the state of the electronic device 20. Specifically, the power receiving side state acquisition unit 153 communicates with the electronic device 20 and acquires the state of the electronic device 20 based on a signal transmitted from the electronic device 20. For example, in the non-contact power feeding method using electromagnetic induction, it is possible to communicate with the power receiving side by superimposing a signal on the input current to the power transmission coil and performing ASK modulation or the like. In this case, the power receiving side state acquisition unit 153 transmits a signal for inquiring about the state of the electronic device 20 and acquires the state of the electronic device 20 based on a signal (response signal) transmitted from the electronic device 20. Note that the communication method with the electronic device 20 (the power receiving side) is not particularly limited, and it is possible to use a publicly known / public technique. In addition, the state acquired by the power receiving side state acquisition unit 153 is not particularly limited, but is preferably a state related to the notification condition described later.

  The light emission control unit 154 is a functional unit that controls the light emitting unit 14. Specifically, the light emission control unit 154 controls the light emission of the light emitting unit 14 in cooperation with the power supply state determination unit 151, the positional deviation detection unit 152, and the power receiving side state acquisition unit 153.

  For example, the light emission control unit 154 causes the light emitting unit 14 to emit light while the power supply state determination unit 151 determines that power is not being supplied. Here, the light emission control unit 154 may perform “continuous light emission” that causes the light emitting unit 14 to continuously emit light while it is determined that power is not being supplied, or “intermittent light emission” that causes light emission intermittently. Further, when the light emitting unit 14 has a multicolor light source, it may be “monochromatic light emission” that emits light in a predetermined single color, or “multicolor light emission” that emits light while changing colors. Hereinafter, the light emission control when no power is supplied is referred to as “first light emission control”.

  Further, for example, the light emission control unit 154 causes the light emitting unit 14 to emit light while the positional deviation detection unit 152 detects the positional deviation. Here, the light emission control unit 154 causes the light emitting unit 14 to emit light by the above-described continuous light emission, intermittent light emission, single color light emission, multicolor light emission, or the like while the positional deviation is detected. In addition, it is preferable that the light emission color and light emission pattern at the time of position shift detection differ from 1st light emission control. Hereinafter, the light emission control at the time of detecting the displacement is referred to as “second light emission control”.

  For example, the light emission control unit 154 causes the light emitting unit 14 to emit light when the state of the electronic device 20 acquired by the power receiving side state acquisition unit 153 corresponds to a predetermined condition (notification condition). Here, it is assumed that the notification condition can be set arbitrarily. Note that the notification conditions are stored in advance in a memory (not shown) provided in the control unit 15.

  For example, a threshold value related to the remaining charge may be set as the notification condition. In this case, the power receiving side state acquisition unit 153 acquires the remaining charge of the secondary battery included in the electronic device 20 as the state of the electronic device 20. The light emission control unit 154 emits the light emitting unit 14 with the above-described continuous light emission, intermittent light emission, single color light emission, multicolor light emission, or the like when the remaining charge amount acquired by the power receiving side state acquisition unit 153 is below the notification condition threshold. Let

  Further, it may be set as a notification condition that a predetermined operation (function) is being executed. For example, it is assumed that printing is set as the notification condition. In this case, the power receiving side state acquisition unit 153 acquires an operation state indicating whether printing is in progress as the state of the electronic device 20 (printer). The light emission control unit 154 causes the light emitting unit 14 to emit light by continuous light emission, intermittent light emission, single color light emission, multicolor light emission, or the like described above when the operation state acquired by the power receiving side state acquisition unit 153 indicates that printing is in progress.

  In addition, it is preferable that the light emission color and the light emission pattern when it corresponds to alerting | reporting conditions differ from 1st light emission control and 2nd light emission control. Moreover, it is preferable to switch a light emission color and a light emission pattern for every alerting | reporting conditions. Hereinafter, the light emission control when the notification condition is satisfied is referred to as “third light emission control”.

  Hereinafter, the operation of the power supply apparatus 10 will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a procedure of light emission control processing executed by the power supply apparatus 10 (control unit 15).

  First, the power supply state determination unit 151 determines whether or not the power supply unit 13 is supplying power (step S11). Here, when it is determined that power is not supplied (step S11; No), the light emission control unit 154 causes the light emission unit 14 to emit light by performing the first light emission control (step S12), and returns to step S11.

  If it is determined in step S11 that power feeding is in progress (step S11; Yes), the misalignment detection unit 152 determines whether the power feeding unit 13 and the electronic device 20 are in a misalignment state (step S13). Here, when a position shift is detected (step S13; Yes), the light emission control part 154 makes the light emission part 14 light-emit by performing 2nd light emission control (step S14), and returns to step S11.

  In step S13, when a position shift is not detected (step S13; No), the power receiving side state acquisition part 153 acquires the state of the electronic device 20 (step S15). Next, the light emission control unit 154 determines whether or not the state acquired in step S15 corresponds to the notification condition (step S16). If it is determined that the notification condition is satisfied (step S16; Yes), the light emission control unit 154 causes the light emission unit 14 to emit light by performing the third light emission control (step S17), and the process returns to step S11.

  If it is determined in step S16 that the notification condition is not met (step S16; No), the light emission control unit 154 turns off the light emitting unit 14 (step S18) and returns to step S11.

  As described above, when the power supply unit 13 is in a non-power supply state, the power supply apparatus 10 of the present embodiment causes the light emitting unit 14 installed in association with the power supplyable area to emit light. Thereby, since the power supply possible area on the top plate 11 can be shown by light emission, the user can easily identify the power supply possible area. In addition, the power supply device 10 causes the light emitting unit 14 to emit light when the electronic device 20 (power receiving unit) is placed with a deviation from the power supply unit 13 (power supplyable area or the like). Thereby, since it can alert | report that it exists in a position shift state, the user can recognize easily that it exists in a position shift state. In addition, the power supply apparatus 10 causes the light emitting unit 14 to emit light when the state of the electronic device 20 corresponds to a predetermined notification condition. Thereby, since the state of the electronic device 20 can be notified, the user can recognize the state of the electronic device 20 without operating the electronic device 20.

[Second Embodiment]
In the above-described embodiment, a configuration has been described in which a power supply area, a position shift state, and the like are represented by light emission on the power supply side. In the second embodiment, a configuration will be described in which a power supply area, a position shift state, and the like are represented by light emission on the power receiving side.

  FIG. 6 is a diagram schematically illustrating an example of the electrical configuration of the electronic apparatus 20A according to the second embodiment. The electronic device 20A is an electronic device such as a printer device corresponding to the electronic device 20 shown in FIG. In the case of the present embodiment, the power supply side may be the power supply device 10 described above, or may be a power supply device in which the light emitting unit 14 and the function unit related to the light emission control of the light emitting unit 14 are removed from the power supply device 10. .

  As illustrated in FIG. 6, the electronic device 20 </ b> A includes a power receiving unit 21, a secondary battery 22, a power load unit 23, a light emitting unit 24, and a control unit 25.

  The power receiving unit 21 is a non-contact power feeding type power receiving unit. The power receiving unit 21 receives power supplied from the power supply apparatus 10. The power receiving unit 21 supplies the received power to each unit of the electronic device 20A. In addition, when the power receiving unit 21 is placed on the surface of the top plate 11, the power receiving unit 21 is provided on the back side of the surface facing the top plate 11, for example, on the bottom of the electronic device 20 </ b> A.

  The secondary battery 22 is a secondary battery such as a battery that stores electric power supplied from the power receiving unit 21. The secondary battery 22 supplies electric power to each part of the electronic device 20 (20A) when no power is supplied. The power load unit 23 is an electronic device that operates with power supplied from the power receiving unit 21 or the secondary battery 22.

  The light emitting unit 24 includes light emitting elements such as multi-color LEDs (Light Emitting Diodes) and surface light sources. The light emitting unit 24 emits light according to the control of the control unit 25. The position where the light emitting unit 24 is installed is not particularly limited as long as it is a position where the emitted light can be visually recognized from the outside. For example, the light emitting unit 24 may be provided around the casing of the electronic device 20A. Further, for example, the light emitting unit 24 may be provided on the operation panel of the electronic device 20A.

  The control unit 25 has a computer configuration such as a processor and a memory (none is shown). The control unit 25 controls the light emitting operation of the light emitting unit 24 based on the state of the power receiving unit 21. Specifically, the control unit 25 includes a power reception state determination unit 251, a positional deviation detection unit 252, and a light emission control unit 253 as functional units. Note that these functional units may have a hardware configuration realized by a dedicated circuit or the like, or may have a software configuration realized by cooperation between a processor and various programs stored in a memory.

  The power reception state determination unit 251 is a functional unit that determines the state of the power reception unit 21. Specifically, the power reception state determination unit 251 determines whether the power reception unit 21 is receiving power from the power supply apparatus 10 (power supply unit 13).

  The misregistration detection unit 252 is a functional unit corresponding to the misregistration detection unit 152 described above, and detects misregistration between the power reception unit 21 and the power feeding device 10 (power feeding unit 13). The detection method for misregistration is not particularly limited, and a publicly known / public technique can be used.

  The light emission control unit 253 is a functional unit that controls the light emitting unit 24. Specifically, the light emission control unit 253 controls the light emission of the light emitting unit 24 in cooperation with the power receiving state determination unit 251 and the positional deviation detection unit 252.

  For example, when the power reception state determination unit 251 determines that power reception is in progress, the light emission control unit 253 causes the light emission unit 24 to emit light. Here, the light emission control unit 253 may perform “continuous light emission” in which the light emitting unit 14 continuously emits light while it is determined that power is being received, or “intermittent light emission” in which light emission is intermittently performed. Alternatively, “temporary light emission” may be used in which the light emitting unit 14 is turned on and then turned off after a predetermined time. Further, when the light emitting unit 14 has a multicolor light source, it may be “monochromatic light emission” that emits light in a predetermined single color, or “multicolor light emission” that emits light while changing colors. Hereinafter, the light emission control during power reception is referred to as “fourth light emission control”.

  Further, for example, the light emission control unit 253 causes the light emitting unit 24 to emit light while the positional deviation detection unit 252 detects the positional deviation. Here, the light emission control unit 253 causes the light emitting unit 24 to emit light by the above-described continuous light emission, intermittent light emission, single color light emission, multicolor light emission, or the like while it is determined as a positional shift. In addition, it is preferable that the light emission color and light emission pattern at the time of position shift detection differ from 4th light emission control. Hereinafter, the light emission control at the time of detecting the displacement is referred to as “fifth light emission control”.

  Hereinafter, the operation of the electronic apparatus 20A will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of a light emission control process performed by the electronic device 20A (control unit 25).

  First, the power reception state determination unit 251 determines whether or not the power reception unit 21 is receiving power (step S21). If it is determined that power is not being received (step S21; No), the light emission control unit 253 turns off the light emitting unit 14 (step S22) and returns to step S21.

  If it is determined in step S21 that power is being received (step S21; Yes), the misalignment detection unit 252 determines whether the power receiving unit 21 and the power feeding apparatus 10 are in a misalignment state (step S23). Here, when the positional deviation is detected (step S23; Yes), the light emission control unit 253 causes the light emission unit 14 to emit light by performing the fifth light emission control (step S24), and returns to step S21.

  In step S23, if a positional shift is not detected (step S23; No), the light emission control unit 253 performs the fourth light emission control to cause the light emitting unit 14 to emit light (step S25), and returns to step S21.

  As described above, the electronic device 20 </ b> A of the present embodiment causes the light emitting unit 24 provided at a visible position to emit light when the power receiving unit 21 is in a power receiving state. Thereby, since it can be shown by light emission of the light emission part 24 whether the mounting position of 20 A of electronic devices is a power supply possible area, the user can identify a power supply possible area easily. Moreover, the electronic device 20 makes the light emission part 24 light-emit, when the electronic device 20 (power receiving part) is shifted and mounted with respect to the electric power feeding part 13 (power supply possible area). Thereby, since it can alert | report that it exists in a position shift state, the user can recognize easily that it exists in a position shift state.

  As mentioned above, although embodiment of this invention was described, each said embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, the electronic device 20A described above is configured to include the secondary battery 22, but is not limited thereto, and may be configured not to include the secondary battery. In this case, the control unit 25 is activated when power reception by the power reception unit 21 is started, and executes the above-described light emission control process.

  The program executed by each device of the above embodiment is provided by being incorporated in advance in a storage medium (ROM or storage unit) included in each device, but is not limited thereto, and can be installed or executed. These files may be recorded on a computer-readable recording medium such as a CD-ROM, flexible disk (FD), CD-R, DVD (Digital Versatile Disk), and the like. Furthermore, the storage medium is not limited to a medium independent of a computer or an embedded system, but also includes a storage medium that downloads and stores or temporarily stores a program transmitted via a LAN, the Internet, or the like.

  Further, the program executed by each device of the above embodiment may be stored on a computer connected to a network and provided by being downloaded via the network, or provided via a network such as the Internet. It may be configured to be distributed.

DESCRIPTION OF SYMBOLS 10 Power supply apparatus 11 Top plate 12 Support body 13 Power supply part 14 Light emission part 15 Control part 151 Power supply state determination part 152 Position shift detection part 153 Power reception side state acquisition part 154 Light emission control part 20 Electronic device (power reception apparatus)
DESCRIPTION OF SYMBOLS 21 Power receiving part 22 Secondary battery 23 Electric power load part 24 Light emission part 25 Control part 251 Power receiving state determination part 252 Position shift detection part 253 Light emission control part

JP 2006-314181 A

Claims (6)

A top plate formed of a light transmissive member;
A power feeding unit that is provided on the back side of the top plate and performs non-contact power feeding to a power receiving unit of an electronic device placed on the front side of the top plate,
A light emitting unit provided on the back side of the top plate and associated with the power feeding unit;
Power supply state determination means for determining whether the power supply unit is in a power supply state;
Control means for causing the light emitting unit to emit light when the power supply state determination means determines that it is in a non-power supply state;
A power supply apparatus comprising: A positional deviation detecting means for detecting a positional deviation between the power feeding unit and the power receiving unit;
The power supply apparatus according to claim 1, wherein the control unit causes the light emitting unit to emit light when the positional deviation detection unit detects a positional deviation. An acquisition means for acquiring the state of the electronic device;
The power supply device according to claim 1, wherein the control unit causes the light emitting unit to emit light when the state of the electronic device acquired by the acquisition unit satisfies a predetermined condition.   The power supply device according to claim 1, wherein the light emitting unit is provided around the power supply unit. A power receiving unit that receives electric power fed in a non-contact manner from a power feeding unit of the power feeding device;
A light emitting unit provided at a position visible from the outside in the device itself;
Power receiving state determining means for determining whether the power receiving unit is in a power receiving state;
Control means for causing the light emitting unit to emit light when the power receiving state determining means determines that it is in a power receiving state;
A power receiving apparatus comprising: A positional deviation detecting means for detecting a positional deviation between the power receiving unit and the power feeding unit;
The power receiving device according to claim 5, wherein the control unit causes the light emitting unit to emit light when the positional deviation detection unit detects a positional deviation.

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