WO2008032746A1

WO2008032746A1 - Power supply sheet and electrically connecting circuit

Info

Publication number: WO2008032746A1
Application number: PCT/JP2007/067755
Authority: WO
Inventors: Takao Someya; Takayasu Sakurai; Makoto Takamiya; Tsuyoshi Sekiya
Original assignee: The University Of Tokyo
Priority date: 2006-09-12
Filing date: 2007-09-12
Publication date: 2008-03-20
Also published as: JPWO2008032746A1

Abstract

A power supply sheet (22) is formed by: a power supply coil sheet (50) having a plurality of power supply coils (52) arranged in a matrix; a power supply circuit sheet (60) having a power supply circuit (60a) formed for applying power for power supply to the respective power supply coils (52); a position detecting coil sheet (30) having position detecting coils (32) arranged in a matrix; and a position detecting circuit sheet (40) having a position detecting circuit (40a) for electrical connection to scan the respective position detecting coils (32). The power supply sheet (22) detects whether an electronic device having a power receiving coil exists on the power supply sheet (22) and applies power for power supply only to the power supply coils (52) corresponding to the position of the electronic device upon detection of one. This improves the efficiency of power supply to an electronic device and increases the freedom of placement of an electronic device on the power supply sheet (22).

Description

Specification

Power supply sheet and power supply circuit

Technical field

TECHNICAL FIELD [0001] The present invention relates to a power supply sheet and a power supply circuit. The present invention relates to an energization circuit having a coil sheet arranged on a sheet in a matrix form.

Background art

Conventionally, as this type of power feeding device, a device that feeds power to a device mounted on a flat plate by energizing a coil provided on the flat plate has been proposed (for example, Patent Document 1). reference). In this device, power is supplied to the device by electromagnetic action between the coil of the device and the coil provided on the flat plate.

Patent Document 1: JP 2005-525705 gazette

Disclosure of the invention

[0003] However, the above-described power supply apparatus does not contribute to the power supply to the device by uniformly energizing the coil attached to the flat plate! /, And generates an electromagnetic field up to the range, so the power supply efficiency is lowered. If a flat plate with a small mounting area is used, the power supply efficiency will be high, but the device mounting range will be narrowed.

[0004] An object of the power supply sheet of the present invention is to improve the efficiency of power supply to devices.

Another object of the power supply sheet of the present invention is to increase the degree of freedom of equipment placement. Furthermore, the power supply sheet of the present invention is one of the purposes for improving transportability and operability. Alternatively, the power supply sheet of the present invention has an object to supply power corresponding to each device.

[0005] The energization circuit of the present invention has an object to energize a plurality of coils independently.

Another object of the circuit for energization of the present invention is to suppress a coil that is not energized from being affected by the coil that is energized.

[0006] The power supply sheet and the energization circuit of the present invention achieve at least a part of the above-described object. In order to do so, the following measures were taken.

[0007] A first power supply sheet of the present invention is a sheet-like power supply sheet used in a power supply device capable of supplying power to a device having a power receiving coil in a non-contact manner, and a plurality of coils are formed into a matrix in a sheet. By energizing at least one coil corresponding to a position on the sheet of the device among the plurality of coils and the coil of the device, the electromagnetic action between the coil that is energized and the coil of the device And a power supply circuit for supplying power to the device.

[0008] In the first power supply sheet of the present invention, energization is performed by energizing at least one coil corresponding to the position on the sheet of the device among the plurality of coils arranged in the coil sheet in a matrix! Power is supplied to the equipment based on the electromagnetic action between the coil and the power receiving coil of the equipment. In other words, the coil not corresponding to the position of the device is not energized, and the coil corresponding to the position on the sheet of the device is energized to supply power to the device. As a result, loss associated with energization of the coil that does not contribute to power supply can be suppressed, and power S can be improved. In addition, it is possible to increase the degree of freedom of equipment installation without reducing the efficiency of power supply. Of course, it is possible to supply power to the device simply by mounting the device on the power supply device using the first power supply sheet of the present invention. Here, the power supply to the equipment is based on the fact that a current can be generated in the power receiving coil of the equipment by an electromagnetic field generated in the coil by energization.

[0009] The first power supply sheet of the present invention may include a position detection unit that detects the position of the device on the coil sheet. By doing this, it is possible to detect the position of the device on the coil sheet and to supply power to the device by energizing only the coil corresponding to the detected position. In this case, the position detecting means is based on an electrical signal obtained in accordance with the positional relationship between the energized coil and the coiler of the device by sequentially energizing at least some of the plurality of coils. It is also possible to use a position detection circuit for detecting the position of the device on the sheet. Here, the detection of the position of the device on the sheet is based on the fact that the electrical signal detected when the coil is energized differs depending on whether the coil of the device is present or not. You can be fi based. [0010] In the first power supply sheet of the present invention having a position detection circuit, the coil sheet is connected to a plurality of position detection coils connected to the position detection circuit and the power supply circuit. It can also consist of a plurality of power feeding coils.

[0011] In the first power supply sheet of the present invention in which such a coil sheet is composed of a position detection coil and a power supply coil, the coil sheet is a position where the plurality of position detection coils are arranged. Two sheets of a detection coil sheet and a power supply coil sheet in which the plurality of power supply coils are arranged may be used. In this case, a position detection circuit sheet in which the position detection circuit is formed on a sheet, and a power supply circuit sheet in which the power supply circuit is formed on the sheet, the front of the device is provided. The power feeding coil sheet, the power feeding circuit sheet, the position detecting coil sheet, and the position detecting circuit sheet may be arranged in this order. In this way, sheets can be formed according to function. Further, the feeding coil sheet and the position detecting coil sheet are arranged so that the feeding coil and the position detecting coil are arranged so that the coils do not overlap at the center of both coils. You can also This makes it possible to efficiently detect the position of the device on the sheet and to supply power to the device.

[0012] Furthermore, in the first power feeding sheet of the present invention in which the coil sheet includes a position detecting coil and a power feeding coil, the position detecting circuit is connected in series to the position detecting coil. ON / OFF of the resistor connected to the resonant frequency voltage applying wiring for applying an AC voltage of the resonance frequency to the position detection coil and the oscillation circuit including the resistor, and the application of the AC voltage of the resonance frequency A circuit comprising a position detection unit having a position detection switching element and a voltage detection wiring for detecting a voltage between terminals of the resistor so as to correspond to the plurality of position detection coils. It can also be assumed. In this way, when the position detection switching element is turned on and an AC voltage having a resonance frequency is applied, the oscillation circuit has a parasitic capacitance that varies depending on whether or not the power reception coil of the device is close to the position detection coil. The position of the device on the sheet can be detected based on the change in the voltage across the resistor due to the change in the resonance frequency. In this case, the position detecting switching element is an organic transistor. [0013] Alternatively, in the first power supply sheet of the present invention in which the coil sheet includes a position detection coil and a power supply coil, the power supply circuit determines whether the power supply coil is energized or not. A power supply unit having a power supply switching element and a power supply voltage application wiring for applying an AC voltage having a predetermined frequency for power supply to the power supply coil via the switching element corresponds to the plurality of power supply coils. It can also be a circuit that is arranged in such a way. In this way, the power supply switching element is turned on and an AC voltage of a predetermined frequency is applied to the power supply coil, thereby generating a current in the power reception coil of the device based on the change in the magnetic field generated by the power supply coil. can do. In this case, the power supply switching element may be a mechanical switch that is turned on and off using an attractive force or a reaction force due to charges of two electrodes. In this way, heating can be suppressed compared to semiconductor switching elements, and more power can be supplied to the device. Further, the power supply voltage application wiring may be configured such that power supply coils other than the power supply coil connected to the wiring are not included in the loop. By so doing, it is possible to suppress the effects of including other power supply coils in the loop, for example, the generation of voltage. Furthermore, in this case, the power supply voltage applying wiring may be formed by arranging two wirings in parallel.

[0014] Further, in the first power feeding sheet of the present invention in which the coil sheet is configured by a position detecting coil and a power feeding coil, the position detecting coil and the power feeding coil are the same coil. The dual-purpose coil can also be used. In this way, the same coil can be used as a position detecting coil and a power feeding coil, and the number of coils can be reduced.

[0015] In the first power supply sheet of the present invention using the dual-purpose coil, the position detection circuit and the power supply circuit include a resistor connected in series to the dual-purpose coil, the dual-purpose coil, and the resistance. Resonance frequency voltage application wiring for applying an AC voltage having a resonance frequency to an oscillation circuit including the position detecting switching element for turning on / off the application of the AC voltage having the resonance frequency, and a voltage across the resistor. A position detection unit having a voltage detection wiring, a power supply switching element that controls whether the dual-purpose coil is energized, and a predetermined power supply to the dual-purpose coil via the switching element. A power supply unit having a power supply voltage application wiring for applying an alternating voltage of a frequency may be a circuit in which the power supply unit is arranged so as to correspond to the plurality of combined coils. In this way, when the position detection switching element is turned on and an AC voltage having a resonance frequency is applied, the resonance frequency of the vibration circuit is affected by the parasitic capacitance that varies depending on whether the power receiving coil is close to the dual-purpose coil. The position of the device on the sheet can be detected based on the change in the voltage between the terminals of the resistor due to the change in the resistance, and by turning on the power switching element and applying an AC voltage of a predetermined frequency to the power supply coil Based on the change in the magnetic field generated by the power supply coil, it is possible to supply power by generating a current in the power reception coil of the device. In this case, the position detecting switching element may be an organic transistor, and the power feeding switching element may be a mechanical switch that is turned on / off using an attractive force or a reaction force due to charges of two electrodes. . In addition, a circuit sheet in which the position detection circuit and the power feeding circuit are formed on a sheet may be provided, and the coil sheet may be arranged in the order of the circuit sheet.

[0016] In the first power supply sheet of the present invention in which the power supply circuit includes a power supply unit having a power supply switching element and a power supply voltage application wiring, the power supply circuit is connected to the power supply voltage application wiring. An adjustment circuit that adjusts the power supply efficiency based on the positions of the power supply coil and the device coil may be provided. In this way, it is possible to adjust the power supply efficiency S and to increase the power supply efficiency. In this case, the adjustment circuit is connected to the first variable capacitor having a variable capacitance arranged in series with the power supply coil and the power supply coil of the first variable capacitor. The circuit may include a second variable capacitor that is connected to a terminal different from the terminal and the ground and has a variable capacitance. In this way, the feeding efficiency can be adjusted by adjusting the capacity of the two variable capacitors.

[0017] Further, the first power supply sheet of the present invention may be flexible. In this way, the transportability and operability of the power supply sheet can be improved.

[0018] The second power supply sheet of the present invention can supply power to a device having a power receiving coil, a communication circuit that communicates based on a current flowing through the coil, and a storage circuit that stores individual information in a contactless manner. A sheet-like power supply sheet used in an apparatus, wherein a plurality of coils are connected to a matrix. Individual information of the device by communicating with the device by energizing at least one coil corresponding to the position on the sheet of the device among the plurality of coils and a coil sheet arranged in a sheet shape An individual information acquiring means for acquiring a current, and a coil that is energized by energizing at least one coil corresponding to a position on the sheet of the device among the plurality of coils based on the acquired individual information; And a power supply means for supplying power to the device based on electromagnetic action with the coil of the device.

[0019] In the second power feeding sheet of the present invention, by energizing at least one coil corresponding to the position on the sheet of the device among a plurality of coils arranged on the coil sheet in a matrix, by communication with the device Acquire individual device information and energize by energizing at least one coil corresponding to the position on the device sheet among the multiple coils based on the acquired individual information! / Based on the electromagnetic action between the coil and the power receiving coil of the device, power is supplied to the device. Thereby, a device can be charged according to an individual device.

[0020] In the second power supply sheet of the present invention, the power supply means includes a plurality of switching elements that control whether or not the plurality of coils are energized, and the plurality of coils via the plurality of switching elements. A voltage application wiring for applying an alternating voltage to each of the plurality of individual elements, and the individual information acquisition unit has a predetermined frequency in which a communication signal is placed on each of the plurality of coils via the plurality of switching elements. It is also possible to obtain the individual information by communicating with the device by applying the AC voltage.

[0021] Further, in the second power supply sheet of the present invention, the individual information includes the identification information of the device, and the power supply means includes the identification information included in the acquired individual information. It can also be a means for supplying power at the time of information. In this way, it is possible to supply power only to a device having predetermined identification information as identification information as individual information.

[0022] Further, in the second power supply sheet of the present invention, the individual information includes information on an allowable power when supplying power to the device, and the power supply unit includes a range of allowable power included in the acquired individual information. It can also be a means for supplying power to the device. In this way, the device can be fed within the allowable power range. In this case, the power supply means is means having a voltage changing circuit that changes the voltage of the AC voltage applied to the energized coil based on the allowable power included in the acquired individual information. Let's go out.

[0023] The energization circuit of the present invention is an energization circuit for energizing the plurality of coils of a coil device in which a plurality of coils are arranged in a matrix, and is a power supply that controls whether or not the coils are energized. A circuit unit comprising: a switching element for power supply; and a wiring for energizing the coil via the switching element, wherein the coil is wired so that a coil other than the coil connected to the wiring is not included in the loop. The gist is that they are arranged so as to correspond to the plurality of coils.

In the energization circuit of the present invention, the energization wiring for energizing the coil is wired so that no coil other than the coil connected to this wiring is included in the loop. It is possible to suppress the influence of including other coils, such as voltage generation. As a result, it is not necessary to provide a switch for each coil in order to suppress the generation of voltage in a coil that is not energized. Of course, each of the plurality of coils can be energized independently.

In the energization circuit of the present invention, the energization wiring may be formed by arranging two wirings in parallel.

[0026] Further, in the energization circuit of the present invention, when a device having a power receiving coil is placed, the energization is performed by energizing at least one coil corresponding to the position on the sheet of the device. Based on the electromagnetic action between the coil and the coil of the device, the power is supplied to the device.

Brief Description of Drawings

FIG. 1 is an exploded configuration diagram schematically showing an outline of a configuration of a power feeding device 20 including a power feeding sheet 22 as one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a positional relationship between a power feeding coil 52 and a position detection coil 32.

FIG. 3 is a circuit diagram showing an example of a position detection circuit 40a.

FIG. 4 is an explanatory diagram showing an example of the connection relationship between the position detection coil 32 and the organic transistor 42 together with the material of the organic transistor 42.

FIG. 5 is a circuit diagram showing an example of a power feeding circuit 60a.

FIG. 6 is a block diagram schematically showing the outline of the configuration of the MEMS switch 62. FIG. 7 is an explanatory view showing an example of the connection relationship between the power feeding coil 52 and the MEMS switch 62 together with the material of the MEMS switch 62.

FIG. 8 is an explanatory diagram showing an example of a change in voltage of the electrostatic attraction electrodes 62a and 62b of the MEMS switch 62 and a change in resistance value between the feeding electrodes 63a and 63b.

FIG. 9] An explanatory diagram schematically showing the position detecting unit 41 and the power receiving coil 12 when the power receiving coil 12 of the electronic device 10 is brought close to the power feeding sheet 22.

FIG. 10 is an explanatory diagram showing a change in the voltage between terminals of the resistor 44 when the electronic device 10 is not brought close to the power supply sheet 22.

11] FIG. 11 is an explanatory diagram showing changes in the voltage across the terminals of the resistor 44 when the electronic device 10 is not brought close to the power supply sheet 22 and when the electronic device 10 is placed on the power supply sheet 22.

FIG. 12 is an explanatory diagram showing an example of the relationship between the distance d between the position detecting coil 32 and the power receiving coil 12 and the voltage across the terminals of the resistor 44.

13] Apply the 56 MHz AC voltage from the power supply 68 to the power supply coil 52 by turning on the MEMS switch 62 corresponding to the power supply coil 52 at a position that approximately matches the power receiving coil 12 of the electronic device 10. It is explanatory drawing which shows typically a mode when doing.

FIG. 14 is an explanatory diagram showing the frequency of power (power) output from the corresponding power feeding coil 52 when the MEMS switch 62 is turned on / off.

FIG. 15 is an explanatory diagram showing the power supply coil 52 force, the power (power), the power received by the power receiving coil 12 and the efficiency when the MEMS switch 62 is turned on.

FIG. 16] An explanatory diagram showing the relationship between the vertical distance z between the feeding coil 52 and the receiving coil 12 and the feeding efficiency.

FIG. 17] An explanatory diagram showing the relationship between the horizontal distance X between the power feeding coil 52 and the power receiving coil 12 and the charging efficiency.

FIG. 18 is a circuit diagram showing an example of a power feeding circuit including the adjustment circuit 70.

FIG. 19 is an explanatory diagram showing an example of the configuration of the adjustment circuit 70.

FIG. 20] is a circuit diagram showing an example of a dual-purpose circuit.

FIG. 21] A configuration diagram showing an outline of a configuration of a power feeding device 120 and an electronic device 10 according to a modification.

FIG. 22 shows a processing routine at the time of power supply executed by the controller 138 of the power supply apparatus 120 of the modified example It is a flowchart which shows an example of a chin.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, the best mode for carrying out the present invention will be described using examples.

FIG. 1 is an exploded configuration diagram schematically showing an outline of a configuration of a power feeding device 20 including a power feeding sheet 22 as an embodiment of the present invention. As shown in the figure, the power feeding device 20 of the embodiment includes a plurality of power feeding coils 52 for feeding power by electromagnetic action with the power receiving coil 12 of the electronic device 10 that is not shown in FIG. A feeding coil sheet 50 arranged on a flexible sheet so that the shaft is in a matrix form, and a feeding circuit 60a for energizing the plurality of feeding coils 52 are formed on the flexible sheet. The coil axis is made up of a plurality of position detection coils 32 for detecting the position of the electronic device 10 on the sheet by electromagnetic action between the power supply circuit sheet 60 and the power receiving coil 12 of the electronic device 10. A position detection coil sheet 30 arranged on a flexible sheet so as to form a shape and a position detection circuit 40a for energizing a plurality of position detection coils 32 are formed on the flexible sheet. Become A power supply sheet 22 configured by stacking the position detection circuit sheets 40 in this order, a power supply switch power supply 69 as a DC power source for turning on and off a switching element (described later) of the power supply circuit 60a, Power supply 68 as an AC power supply for supplying power to device 10, position detection switch power supply 49 as a DC power supply for turning on / off a switching element (described later) of position detection circuit 40a, and a position detection coil And a position detection power supply 48 as an AC power supply for energizing 32. As illustrated in FIG. 2, the power supply coil sheet 50 and the position detection coil sheet 30 overlap the coil center of the position detection coil 32 when the power supply sheet 22 is configured. In other words, the feeding coil 52 and the position detecting coil 32 are arranged so that the centers of both coils are arranged in a staggered manner. By doing so, the influence of the position detection coils 32 and the power supply coils 52 on the magnetic flux is suppressed, and the performance of the position detection coils 32 and the power supply coils 52 can be fully exhibited.

[0030] The position detection coil sheet 30 is obtained by applying an etching resist in a coil shape to a polyimide film on which a copper foil of 6,1 m is pasted by using screen printing, and then etching with ferric chloride. Thus, a plurality of position detection coils 32 are formed. Implementation In the example, the force for forming the position detection coil 32 with 38 windings, an inner diameter of 10 mm, an inductance of 20 mm H, and a resistance of 17 Ω is not limited to this specification. For example, lmm, 5mm, or 20mm can be used as the inner diameter.

FIG. 3 is a circuit diagram showing an example of the position detection circuit 40a. As shown in the figure, the position detection circuit 40a includes a 10 Ω resistor 44 connected in series to the position detection coil 32, a variable capacitance capacitor 45 for adjusting the capacitance of the circuit, a position detection coil 32, and a resistor 44. And a position detection power supply 48 and a bit line BP as a resonance frequency voltage application wiring connected to the position detection power supply 48 in order to apply an AC voltage of the resonance frequency to the vibration circuit composed of the variable capacitor 45 The voltage detection wiring 46 for detecting the voltage between the terminals of the resistor 44, the voltage sensor 47 connected to the voltage detection wiring 46, and the position detection unit 41 that also has a force 41 Is formed in a matrix of N rows and N columns so as to correspond to NXN position detection coils 3 2, and the source and drain of each organic transistor 42 are for position detection by bit lines BP;! A power source 48 is connected, and a position detection switch power source 49 is connected to the gate of each organic transistor 42 by a word line WP ;! to WPN. In the embodiment, the position detection power supply 48 is 2.95 MHz, which is the resonant frequency of the circuit, and the position detection switch power supply 49 is a 40 V power supply. The resonant frequency of the circuit is controlled by adjusting the variable capacitor 45.

[0032] The organic transistor 42 was fabricated as follows. First, silver nanoparticles are coated on a plastic film with an ink jet printer, and silver nanoparticles are baked in the atmosphere at 220 ° C. for 1 hour to form a gate electrode (in the example, the thickness is 300 nm and the resistivity is 4 Q cm). Next, an epoxy resin is applied by a screen printer to form a partition (in the example, 5 inches) around each gate electrode. Subsequently, a polyimide precursor diluted to 8 mPas is applied onto the gate electrode in the partition wall by ink jet and cured at 180 ° C. in a nitrogen atmosphere to form a polyimide gate insulating film (thickness 1 μm). Then, an organic semiconductor pentacene having a thickness of 50 nm is formed using a vacuum evaporation method, and finally, the source and drain electrodes are formed using a vacuum evaporation apparatus to complete the organic transistor 42. In the embodiment, the organic transistor 42 has a channel length of 13 mm and a channel width of 48 mm. Figure 4 An example of the connection relationship between the position detection coil 32 and the organic transistor 42 is shown together with the material of the organic transistor 42. As shown in the figure, the drain of the position detection coil 32 and the organic transistor 42 is connected by a silver paste 38. The silver paste 38 is also used for bonding the position detecting coil sheet 30 and the position detecting circuit sheet 40 together.

Yes

[0033] In the same manner as the position detection coil sheet 30, the power feeding coil sheet 50 is obtained by applying an etching resist in a coil shape to a polyimide film in which a 6 μm copper foil is occupied by a screen using screen printing. A plurality of power supply coils 52 are formed by etching with ferric chloride. In the embodiment, the force for forming the power feeding coil 52 with 13 windings, an inner diameter of 10 mm, an inductance of 3 H, and a resistance of 1 Ω is not limited to this specification. For example, lmm, 5mm, and 20mm can be used as the inner diameter.

FIG. 5 is a circuit diagram showing an example of the power feeding circuit 60a. As shown in the figure, the power feeding circuit 60a includes a MEMS (Micro Electro Mechanical System) switch 62 as a switching element for turning on and off the power feeding coil 52, and a power feeding power source 68 via the MEMS switch 62. The power supply voltage application wiring 64 for applying the AC voltage to the power supply coil 52 and the power supply unit 61, which is also powerful, are formed in a matrix of N rows and N columns so as to correspond to the NXN power supply coils 52. The MEMS switch 62 is connected to the power supply switch power supply 69 by the bit line BT1˜: BTN, word line WT;! ˜WTN, and the power supply power supply 68 is connected in series with the MEMS switch 62 and the power supply coil 52. Connected and configured. As the power supply 68, in the embodiment, a power supply of 13.65 MHz which is a frequency band in which high power transmission is permitted in the Japanese Radio Law is used, and a 70 V power supply is used as the power supply switch power supply 69. . Here, in the power supply circuit 60a of the embodiment, the power supply voltage application wiring 64 is arranged in parallel with two wirings, and any power supply coil 52 is not included in the loop. As a result, it is possible to suppress the influence caused by the inclusion of another power supply coil 52 in the loop formed by the power supply voltage application wiring 64, for example, the occurrence of unexpected voltage (noise).

FIG. 6 is a configuration diagram schematically showing an outline of the configuration of the MEMS switch 62. The MEMS switch 62 has an electrostatic attraction electrode 62a, 62b and a voltage across the electrostatic attraction electrode 62a, 62b. The power supply electrodes 63a and 63b are in contact with each other by the attractive force generated by the action of the. In the embodiment, the MEMS switch 62 is formed as an upper electrode sheet by applying an electrostatic attractive electrode 62a and a feeding electrode 63a to a polyimide film (thickness 25 m) by inkjet, and a polyimide film (thickness 75 m). ) Electrostatic attraction electrode 62b and feeding electrode 63b are applied by inkjet to form a lower electrode sheet, and the upper electrode sheet and the lower electrode sheet are polyimide film (thickness 25 Hm) insulating spacer sheet And sandwiched by a thermocompression bonding adhesive sheet. FIG. 7 shows an example of the connection relationship between the feeding coil 52 and the MEMS switch 62 together with the material of the MEMS switch 62. As shown in the figure, the feeding coil 52 and the feeding electrode 63a are connected by a silver paste 58. The silver paste 58 is also used for bonding the power feeding coil sheet 50 and the power feeding circuit sheet 60 together. FIG. 8 shows an example of a change in voltage of the electrostatic attractive electrodes 62a and 62b of the MEMS switch 62 and a change in resistance value between the feeding electrodes 63a and 63b. As shown in the figure, the resistance value between the feeding electrodes 63a and 63b follows the change in the voltage of the electrostatic attractive electrodes 62a and 62b.

Next, the position detection mechanism using the position detection coil sheet 30 and the position detection circuit sheet 40 will be described. Since the resonance frequency of the position detection unit 41 is 2.95 MHz, when the frequency is applied to the position detection unit 41, the largest voltage is generated between the terminals of the 10Ω resistor 44. Fig. 9 schematically shows the position detection unit 41 and the power receiving coil 12 when the power receiving coil 12 of the electronic device 10 is brought close to the power feeding sheet 22, and Fig. 10 shows the electronic device 10 close to the power feeding sheet 22. This shows the change in the voltage Vs between the terminals of the resistor 44 when not in operation. As shown in Fig. 10, the voltage across resistor 44 varies greatly depending on the applied frequency. When the power receiving coil 12 of the electronic device 10 approaches the position detection coil 3 2 to which a voltage of such a resonance frequency is applied, parasitic capacitance is generated, and the resonance frequency becomes lower than 2.95 MHz, and the resistance 44 is connected between the terminals of the resistor 44. The voltage Vs becomes smaller. FIG. 11 shows changes in the voltage _Vs between the terminals of the resistor ₄₄ when the electronic device 10 is not brought close to the power supply sheet 22 and when the electronic device 10 is placed on the power supply sheet 22. As shown in the figure, the voltage Vs between the terminals of the resistor 44 is reduced by 91% due to the generation of parasitic capacitance. The deviation of the resonance frequency due to the generation of parasitic capacitance depends on the distance d between the position detection coil 32 and the power receiving coil 12 of the electronic device 10. Change. FIG. 12 shows an example of the relationship between the distance d between the position detecting coil 32 and the power receiving coil 12 and the terminal voltage Vs of the resistor 44. As shown in the figure, the voltage Vs between the terminals of the resistor 44 changes when the distance d between the position detecting coil 32 and the power receiving coil 12 is from Omm to 23 mm. Accordingly, the NXN organic transistors 42 formed on the position detection circuit sheet 40 are sequentially turned on so as to scan, and the voltage of the voltage sensor 47 is detected, so that the organic transistor 42 among the NXN organic transistors 42 is detected. The position detection coil 32 on which the electronic device 10 is positioned can be detected by the degree of the voltage drop of the corresponding resistor 44 when turned on.

[0037] Next, a power feeding mechanism using the power feeding coil sheet 50 and the power feeding circuit sheet 60 will be described. FIG. 13 shows that the MEMS switch 62 corresponding to the power feeding coil 52 at a position substantially aligned with the power receiving coil 12 of the electronic device 10 is turned on, and an AC voltage of 13.56 MHz from the power source 68 to the power feeding coil 52 is applied. It is explanatory drawing which shows a mode when it applies. As shown in the figure, the magnetic flux generated by applying an AC voltage to the power feeding coil 52 passes through the power receiving coil 12 of the electronic device 10 due to the magnetic flux changing at 56 MHz. 10 can be powered. Figure 14 shows the frequency of the power output from the power supply coil 52 when the MEMS switch 62 is turned on and off, and Figure 15 shows the power from the power supply coil 52 when the MEMS switch 62 is turned on. (Power), the power received by the power receiving coil 12 and the efficiency. As shown in Fig. 14, the output from the feeding coil 52 is 116 mW at the frequency of 13.5 6 MHz when the MEMS switch 62 is turned on, so the output in the 13.56 MHz band is not performed. I understand that Further, as shown in FIG. 15, the power receiving coil 12 receives power linearly with an efficiency of about 62.3% with respect to the power output from the power feeding coil 52. 16 is an explanatory diagram showing the relationship between the vertical distance z between the feeding coil 52 and the receiving coil 12 and the efficiency of feeding, and FIG. 17 is the horizontal distance X between the feeding coil 52 and the receiving coil 12 and charging. It is explanatory drawing which shows the relationship with efficiency. As shown in Fig. 16, when the vertical distance z is lmm, the efficiency decreases about 40% compared to Omm, and as shown in Fig. 17, when the horizontal distance x is 2 mm, it is less than Omm. About 20%.

[0038] Next, the operation of the power feeding device 20 including the power feeding sheet 22 thus configured will be described. To do. The power feeding device 20 first detects whether or not the electronic device 10 exists at any position on the power feeding sheet 22 by sequentially turning on / off the organic transistors 42 in the position detection circuit sheet 40 so as to scan. When the electronic device 10 is detected, the MEMS switch 62 connected to the power supply coil 52 corresponding to the position where the electronic device 10 is detected is turned on, and the power supply power source 68 supplies the AC voltage to the power supply coil 52. Apply. As a result, power is supplied to the electronic device 10. Here, only the MEMS switch 62 connected to the power supply coil 52 corresponding to the position where the electronic device 10 is detected is turned on, and the MEMS switch 62 connected to the other power supply coil 52 is turned off. Therefore, power can be efficiently supplied to the power receiving coil 12 of the electronic device 10.

[0039] According to the power supply sheet 22 of the power supply apparatus 20 of the embodiment described above, the use of the power supply apparatus 20 detects whether or not the electronic device 10 is present on the power supply sheet 22, and the electronic apparatus. When 10 is detected, only the MEMS switch 62 connected to the power supply coil 52 corresponding to the position of the electronic device 10 is turned on to apply power to the power supply coil 52 by applying an AC voltage from the power supply 68. In addition to efficiently supplying power to the device 10, the degree of freedom of placing the electronic device 10 on the power supply sheet 22 can be increased. Therefore, even if the electronic device 10 is placed on any position on the power supply sheet 22 and the electronic device 10 is moved on the power supply sheet 22, power can be supplied to the electronic device 10.

[0040] Further, according to the power supply sheet 22 of the embodiment, the position detection coil sheet 30, the position detection circuit sheet 40, the power supply coil sheet 50, and the power supply circuit sheet 60 are all flexible films. Therefore, the power supply sheet 22 itself can also have flexibility. As a result, even if the power supply sheet 22 has a large area, it can be rolled into a cylindrical shape and transported, so that good transportability and operability can be obtained.

[0041] Furthermore, according to the power supply sheet 22 of the embodiment, since the coil center of the power supply coil 52 is arranged so as not to overlap the coil center of the position detection coil 32, the position detection coil 32 and the power supply coil are arranged. The influence on the magnetic flux of 52 can be suppressed, and the efficiency of position detection and power feeding can be increased.

[0042] In the power feeding circuit 60a of the power feeding sheet 22 of the embodiment, the power corresponding to the horizontal distance X between the power feeding coil 52 and the power receiving coil 12 is not provided. As illustrated in FIG. An adjustment circuit 70 that adjusts the efficiency of power feeding with respect to the horizontal distance x between the power coil 52 and the power receiving coil 12 may be interposed in the power source 68 for power feeding. As shown in FIG. 19, the adjustment circuit 70 includes a variable capacitor 72 connected in series to the power supply 68, and a variable capacitor 74 disposed between the power supply 68 and the ground. This is composed of two variable capacitors. By adjusting the capacitances of these two variable capacitors 72 and 74, the power supply efficiency can be improved by adjusting the capacitance of the two variable capacitors 72 and 74.

In the power supply sheet 22 of the embodiment, the position detection coil 32 and the power supply coil 52 are formed on separate sheets, but may be formed on a single sheet. In this case, the position detection coil 32 and the power feeding coil 52 may be used as the same coil. In this way, when the position detection coil 32 and the power feeding coil 52 are also used as the same coil, the shared coil (hereinafter referred to as a dual-purpose coil) 52B is a dual-purpose coil sheet that is arranged in a matrix on the sheet. The power sheet can be configured by stacking two sheets in this order, the dual-purpose circuit sheet in which the dual-purpose circuit having the functions of the position detection circuit 40a and the power supply circuit 60a is formed in a sheet shape. An example of a shared circuit is shown in Figure 20. In this way, the power feeding sheet can be constituted by two sheets, and the power feeding sheet can be formed thinner.

[0044] In the power supply sheet 22 of the embodiment, the force S is assumed to use the organic transistor 42 as the switching element of the position detection circuit 40a, and the switching element used in the position detection circuit 40a is limited to the organic transistor 42. It does not matter if any switching element is used.

[0045] In the power supply sheet 22 of the example, the vibration circuit including the position detection coil 32, the resistor 44, and the variable capacitor 45 is configured so that the resonance frequency is 2.95 MHz, and the frequency of 2.95 MHz is set. The resonance frequency of the force S and the vibration circuit using the position detection power supply 48 for applying the AC voltage is not limited to 2.95 MHz, but may be any frequency. If the frequency of the AC voltage applied to the vibration circuit is the resonance frequency of the vibration circuit based on the position detection mechanism, the position on the power supply sheet 22 of the electronic device 10 can be detected at any frequency.

[0046] In the power supply sheet 22 of the example, electrostatic attractive force is used as a switching element of the power supply circuit 60a. Power supply using MEMS switch 62 that is turned on when power supply electrodes 63a and 63b come into contact with each other due to the attractive force generated by applying a voltage to electrodes 62a and 62b It is also possible to use a switch that is turned on when the working electrode contacts. Can be turned on / off instead of MEMS switch 62

[0047] In the power supply sheet 22 of the example, the force S is assumed to apply an AC voltage of 13.56 MHz to the power supply coil 52, and the frequency of the AC voltage applied to the power supply coil 52 is 13.56 MHz. There is no power at any frequency that is not limited.

In the power supply sheet 22 of the embodiment, the power supply voltage application wiring 64 is formed of two parallel wirings, and the power supply circuit 60a is formed so that the other power supply coil 52 is not included in the loop. Since the power feeding circuit 60a is formed so that the power feeding coil 52 is not included in the loop, the power feeding voltage applying wiring 64 does not have to be two parallel wirings. Also, the power supply voltage application wiring may be arranged so that the other power supply coil 52 is included in the loop.

[0049] In the power supply sheet 22 of the example, the position detection coil sheet 30, the position detection circuit sheet 40, the power supply coil sheet 50, and the power supply circuit sheet 60 are all formed to have flexibility. The sheet! /, The slippage! /, And it is not flexible! In this case, the power supply sheet does not have flexibility.

In the power supply sheet 22 of the embodiment, the position of the electronic device 10 on the power supply sheet 22 is detected using the position detection coil sheet 30 and the position detection circuit sheet 40. The detection of the position of the electronic device 10 on 22 is not limited to the position detection coil sheet 30 and the position detection circuit sheet 40, but a plurality of touch sensors and load sensors are arranged on a plane. The sheet is replaced with the coil sheet 30 for position detection or the circuit sheet 40 for position detection, and the power sheet is configured by using the coil sheet 50 for power supply or the circuit sheet 60 for power supply. It detects the electronic device 10 on the power supply sheet 22, such as detecting the position on the power supply sheet 22 of the electronic device 10 based on the position of the sensor or load sensor on the sheet. Lever may be any thing. In addition, an image from a photographing device that captures the placement surface of the power feeding sheet 22 The electronic device 10 on the power supply sheet 22 may be detected by image processing the data.

In the power supply sheet 22 of the embodiment, whether or not the electronic device 10 is present on the power supply sheet 22 is detected, and when the electronic device 10 is detected, the power supply coil 52 corresponding to the position of the electronic device 10 is used. Power to supply power to the electronic device 10 It is also possible to acquire individual information of the electronic device 10 through communication with the electronic device 10 on the power supply sheet 22 and supply power to the electronic device 10 based on the individual information. . Hereinafter, the power feeding device 120 of this modification will be described. FIG. 21 shows a schematic configuration of the power feeding device 120 and the electronic device 10 according to the modification.

[0052] As shown in FIG. 21, the electronic device 10 includes a power receiving coil 12 for receiving power from the power feeding device 120, a rectifier 13 for rectifying the AC power received by the power receiving coil 12, and the rectified power. A transmission / reception coil 16a that functions as a transmission / reception antenna simply by providing the battery 14 to be charged, a rectifier 16b that rectifies the received electrical signal and supplies it as power, and a signal analysis unit RF (Radio Frequency) that analyzes the received signal ) 16c, memory cell 16e for storing information, and information received by transmission / reception coil 16a based on the signal received by transmission / reception coil 16a and analyzed by signal analysis unit RF16c (information analyzed by signal analysis unit RF16c ( Data) is stored in the memory cell 16e, and information (data) is read from the memory cell 16e and transmitted from the transmission / reception coil 16a via the signal analysis unit RF16c. That. In the memory cell 16e, product identification information of the electronic device 10, allowable power at the time of power feeding, and the like are stored as individual information.

[0053] As shown in FIG. 21, the power supply device 120 of the modification is similar to the power supply sheet 22 provided in the power supply device 20 of the embodiment, and includes a position detection coil sheet 30, a position detection circuit sheet 40, and a power supply device. A coil sheet 50 and a power feeding circuit sheet 60, a transmission / reception signal adjustment circuit 130 for adjusting transmission / reception signals, and a position detection power supply 48 for supplying an AC voltage to the position detection coil 32 via the organic transistor 42 The modulation circuit 132 that modulates the transmission signal from the transmission / reception signal adjustment circuit 130 with respect to the AC voltage from the signal 130 and the demodulation that demodulates the signal from the transmission / reception coil 16a of the electronic device 10 from the signal detected by the position detection coil 32 AC supplied from the power supply 68 between the power supply 68 and the circuit sheet 60 for supplying power to the circuit 134 and the power supply coil 52 via the MEMS switch 62 A voltage adjustment circuit 136 for adjusting the voltage of the voltage and a controller 138 for controlling the entire power feeding device 120 are provided.

Next, the operation of the power supply apparatus 120 of the modified example configured as described above, particularly the operation of performing power supply through communication will be described. FIG. 22 is a flowchart illustrating an example of a processing routine during power supply executed by the controller 138 of the power supply apparatus 120 according to the modification. When this processing routine is executed, first, the organic transistors 42 of the position detection circuit sheet 40 are sequentially turned on, the position detection coil 32 is energized in order, and the position of the electronic device 10 on the power supply sheet 22 is detected ( Step S100). When the position of the electronic device 10 is detected, the individual transistor information stored in the memory cell 16e of the electronic device 10 is acquired by turning on the organic transistor 42 of the position detection coil 32 corresponding to the position of the electronic device 10. The process is executed (step S110). In this process, a control signal for transmitting individual information from the electronic device 10 is output from the transmission / reception signal adjustment circuit 130 to the modulation circuit 132, and the modulation circuit 132 outputs the control signal to the AC voltage from the position detection power supply 48. The position detection coil 32 is energized with the modulated AC voltage via the organic transistor 42, and the signal transmitted from the electronic device 10 is received by the position detection coil 32 and demodulated. The signal is demodulated by the circuit 134 and input to the transmission / reception signal adjustment circuit 130, which is output by the transmission / reception signal adjustment circuit 130 to the controller 138. In the electronic device 10 that has received the control signal for transmitting the individual information from the electronic device 10 by the transmission / reception coil 16a, the control signal is analyzed by the signal analysis unit RF16c, and the control unit 16d performs the measurement based on the analyzed signal. Individual information such as product identification information of the electronic device 10 stored in the Moricell 16e and allowable power at the time of power supply is transmitted from the transmission / reception coil 16a via the signal analysis unit RF16c. At this time, in the electronic device 10, the electric power received from the transmission / reception coil 16a is rectified and supplied to the power supply device 120 using the electric power from the rectifier 16, and thus the battery 14 is completely discharged. Even at times, individual information can be transmitted and received.

[0055] When the individual information of the electronic device 10 is acquired in this way, the power is determined by determining whether or not the electronic device 10 may be supplied based on the product identification information of the electronic device 10 included in the acquired individual information. Sorting electronic devices (step S 120). This selection includes, for example, information indicating whether the device can supply power to the upper 2 digits or 3 digits of the product identification information. This can be done by determining this. In the case of an electronic device that can supply power, a voltage as an execution value of the AC voltage applied to the power supply coil 52 is determined as the power supply voltage based on the allowable power at the time of power supply of the acquired individual information. In step S130), the voltage adjustment circuit 136 adjusts the AC voltage from the power supply 68 to the determined power supply voltage, and turns on the MEMS switch 62 for the power supply coil 52 corresponding to the position of the electronic device 10 to turn it on. Power supply to the device 10 is started (step S140), and the processing routine is ended.

[0056] According to the power supply device 120 of the modified example described above, the individual information of the electronic device 10 is acquired by communication with the electronic device 10 on the power supply sheet 22, and based on the product identification information included in the individual information! It is possible to perform power feeding by determining whether or not power can be fed! /. As a result, it is possible to select whether or not to supply power only by storing in the device whether or not the device supplies power as product identification information. In addition, since the power supply voltage is set based on the allowable power at the time of power supply of the individual information and power is supplied to the electronic device 10, the electronic device 10 can be supplied with appropriate power.

[0057] In the power supply device 120 of the modification, the product identification information and the allowable power at the time of power supply are stored in the electronic device 10 as individual information of the electronic device 10, and whether or not the power supply is performed based on the product identification information. The power S is used to supply power to the electronic device 10 by setting the voltage for power supply based on the allowable power at the time of power supply, and only one of the product identification information and the allowable power at the time of power supply is the electronic device 10 It is also possible to store the electronic device 10 as individual information and execute only one of power supply selection based on product identification information and power supply of the electronic device 10 using power supply voltage based on allowable power at the time of power supply. Good. Further, information other than product identification information and allowable power at the time of power feeding may be stored in the electronic device 10 as individual information, and the electronic device 10 may be powered based on the stored individual information.

[0058] In the power supply device 120 of the modified example, it has been described that one electronic device 10 is mounted on the power supply sheet 22 and is V, but there are a plurality of electronic devices on the power supply sheet 22. When it is mounted, power is supplied by setting each power supply voltage to each electronic device based on the allowable power at the time of power supply included in each individual information acquired from each electronic device. It may be a thing. In this case, it is necessary to provide a voltage adjustment circuit 136 for each power supply coil 52. What is necessary is just to comprise a path. In addition, it is also possible to set the power supply voltage based on the lowest allowable power among the allowable power included in each individual information acquired from each electronic device and to supply each electronic device. .

In the power supply device 120 of the modified example, the electronic device 10 includes the power receiving coil 12 and the transmission / reception coil 16a. However, the power reception coil 12 may also serve as the transmission / reception coil 16a.

[0060] In the power supply device 120 of the modification, the position detection coil 32 may be used to communicate with the electronic device 10, and the force power supply coil 52 may be used to communicate with the electronic device 10; It is good for communicating with the electronic device 10 using an antenna different from the detection coil 32 and the feeding coil 52.

[0061] As described above, the best mode for carrying out the present invention has been described using examples. However, the present invention is not limited to these examples, and does not depart from the gist of the present invention! Of course, various forms can be implemented within the range.

Industrial applicability

[0062] The present invention can be used in manufacturing industries such as a power feeding sheet and a power feeding device.

Claims

The scope of the claims

[1] A sheet-like power supply sheet used for a power supply device capable of supplying power to a device having a power receiving coil in a contactless manner,

A coil sheet comprising a plurality of coils arranged in a matrix on the sheet;

By supplying current to at least one coil corresponding to a position on the sheet of the device among the plurality of coils, power is supplied to the device based on an electromagnetic action between the coil that is energized and the coil of the device. A power supply circuit for

A power supply sheet.

[2] The power feeding sheet according to claim 1,

Position detecting means for detecting the position of the device on the coil sheet;

A power supply sheet.

[3] The power supply sheet according to claim 2,

The position detecting means sequentially energizes at least some of the plurality of coils, and the device based on the electrical signal obtained according to the positional relationship between the energized coil and the coil of the device. A position detection circuit for detecting the position on the sheet

Power supply sheet.

[4] The power feeding sheet according to claim 3,

The coil sheet includes a plurality of position detection coils connected to the position detection circuit and a plurality of power supply coils connected to the power supply circuit.

[5] The power feeding sheet according to claim 4,

The coil sheet is two sheets of a position detection coil sheet in which the plurality of position detection coils are arranged and a power supply coil sheet in which the plurality of power supply coils are arranged.

Power supply sheet.

[6] The power supply sheet according to claim 5,

A circuit sheet for position detection formed by forming the circuit for position detection on a sheet; A power supply circuit sheet formed by forming the power supply circuit on a sheet;

With

The power supply coil sheet, the power supply circuit sheet, the position detection coil sheet, and the position detection circuit sheet are arranged in this order with respect to the device.

Power supply sheet.

[7] The power supply sheet according to claim 5 or 6,

The feeding coil sheet and the position detecting coil sheet are arranged so that the feeding coil and the position detecting coil are arranged so that the coils do not overlap at the center of both coils.

Power supply sheet.

[8] A power supply sheet according to claim 4 or 7 or shift,

The position detection circuit includes a resistor connected in series to the position detection coil, and a resonance frequency voltage application wiring for applying an AC voltage having a resonance frequency to the vibration circuit including the position detection coil and the resistor. A position detection unit comprising: a position detection switching element that turns off application of an alternating voltage of the resonance frequency; and a voltage detection wiring for detecting a voltage between terminals of the resistor. It is a circuit that is arranged to correspond to the detection coil.

Power supply sheet.

[9] The power supply sheet according to claim 8,

The position detecting switching element is an organic transistor.

Power supply sheet.

[10] A power feeding sheet according to claim 4 or 9 or shift,

The power supply circuit includes a power supply switching element that controls whether the power supply coil is energized and a power supply voltage application for applying an AC voltage having a predetermined frequency for power supply to the power supply coil via the switching element. A circuit in which a power supply unit having wiring is arranged to correspond to the plurality of power supply coils,

Power supply sheet.

[11] The power supply sheet according to claim 10, The power supply switching element is a mechanical switch that is turned on and off using an attractive force or a reaction force due to charges of two electrodes.

Power supply sheet.

[12] The power supply sheet according to claim 10 or 11,

The power supply voltage application wiring is wired so that a power supply coil other than the power supply coil connected to the wiring is not included in the loop.

Power supply sheet.

[13] The power feeding sheet according to claim 12,

The power supply voltage application wiring is composed of two wirings arranged in parallel.

Power supply sheet.

[14] The power supply sheet according to claim 4,

The position detection coil and the power feeding coil are also used as a common coil which is the same coil.

Power supply sheet.

[15] The power feeding sheet according to claim 14,

The position detecting circuit and the power feeding circuit are for applying a resonance frequency voltage for applying an AC voltage having a resonance frequency to a resistor connected in series to the dual-purpose coil, and the vibration circuit including the dual-purpose coil and the resistor. A position detecting unit having a wiring, a position detecting switching element for turning on and off the application of an AC voltage of the resonance frequency, and a voltage detecting wiring for detecting a voltage across the terminals of the resistor, and energizing the dual-purpose coil A plurality of dual-purpose coils including a single-feed power supply unit that includes a power-feeding switching element that controls the presence or absence of power supply and a power supply voltage application wiring for applying an AC voltage having a predetermined frequency for power supply to the dual-purpose coil via the switching element. A power supply sheet, which is a circuit that is arranged to correspond.

[16] The power feeding sheet according to claim 15,

The position detecting switching element is an organic transistor,

The power supply switching element is a mechanical switch that is turned on and off using an attractive force or a reaction force due to charges of two electrodes. Power supply sheet.

[17] The power supply sheet according to claim 15 or 16,

A circuit sheet comprising the position detection circuit and the power feeding circuit formed on a sheet,

The coil sheet and the circuit sheet are arranged in this order.

Power supply sheet.

[18] The power feeding sheet according to any one of claims 10 to 12, 15 to 17,

An adjustment circuit that is connected to the power supply voltage application wiring and adjusts the power supply efficiency based on the position of the power supply coil and the coil of the device;

A power supply sheet.

[19] The power feeding sheet according to claim 18,

The adjustment circuit is different from a first variable capacitor having a variable capacitance arranged in series with the power supply coil and a terminal connected to the power supply coil of the first variable capacitor. A second variable capacitor having a variable capacitance connected to the terminal and the ground,

Power supply sheet.

[20] A power supply sheet according to claim 1! /, 191 /

Having a pretty life,

Power supply sheet.

[21] A sheet-shaped power supply sheet used in a power supply device that can supply power to a device having a power receiving coil, a communication circuit that communicates based on a current flowing through the coil, and a storage circuit that stores individual information in a non-contact manner There,

A coil sheet comprising a plurality of coils arranged in a matrix on the sheet;

Individual information acquisition means for energizing at least one coil corresponding to a position on the sheet of the device among the plurality of coils and acquiring individual information of the device by communication with the device;

The energized coil by energizing at least one coil corresponding to a position on the sheet of the device among the plurality of coils based on the acquired individual information; A power supply sheet comprising: a power supply means for supplying power to the device based on electromagnetic action with a coil of the device.

[22] The power feeding sheet according to claim 21,

The power supply means includes a plurality of switching elements that control whether the plurality of coils are energized, and a voltage application wiring for applying an AC voltage to each of the plurality of coils via the plurality of switching elements. With

The individual information acquisition means communicates with the device to acquire the individual information by applying an AC voltage having a predetermined frequency with a communication signal on each of the plurality of coils via the plurality of switching elements. Is a means to

Power supply sheet.

[23] The power supply sheet according to claim 21 or 22,

The individual information includes identification information of the device,

The power supply means is means for supplying power when the identification information included in the acquired individual information is predetermined identification information.

Power supply sheet.

[24] The power feeding sheet according to any one of claims 21 to 23,

The individual information includes, as information, allowable power when supplying power to the device, and the power supply unit is a unit that supplies power to the device within a range of allowable power included in the acquired individual information.

Power supply sheet.

[25] The power supply sheet according to claim 24,

The power supply means is a means having a voltage changing circuit for changing the voltage of the AC voltage applied to the energized coil based on the allowable power included in the acquired individual information.

Power supply sheet.

[26] An energization circuit for energizing the plurality of coils of a coil device in which a plurality of coils are arranged in a matrix,

A switching element for power supply that controls whether or not the coil is energized, and the switching element A circuit unit having a wiring for energizing the coil so that a coil other than the coil connected to the wiring is not included in the norpe corresponds to the plurality of coils. Arranged to do,

Circuit for energization.

[27] The energization circuit according to claim 26,

The energization wiring is composed of two wirings arranged in parallel.

Circuit for energization.

[28] The energization circuit according to claim 26 or 27,

When a device having a coil for receiving power is placed, by energizing at least one coil corresponding to the position on the sheet of the device, the electromagnetic action between the energized coil and the coil of the device is affected. Power!

Circuit for energization.