Wireless power charging system

Abstract

The present invention relates to a wireless power charging system that structurally overcomes the limitation of a conventional antenna matching circuit so as to be capable of supplying wireless power to a smart contact lens at a wider radius and a longer distance. The wireless power charging system comprises: a first device including a first antenna and a transmission circuit that controls the first antenna; and a second device including a second antenna electromagnetically linked to the first antenna and a reception circuit linked to the second antenna, wherein: the first device and the second device include a healthcare device; and the first antenna included in the first device supplies wireless power to the second device through the second antenna included in the second device, and the second device may not include a battery for storing power.

Description

wireless power charging system

[0001] The present invention relates to a wireless power charging system.

[0002] More specifically, the present invention relates to a wireless power charging system capable of supplying wireless power to a smart contact lens over a wider radius and at a longer distance by structurally overcoming the limitations of existing antenna matching circuits.

[0003]

[0004] Recently, healthcare technologies that can monitor or treat a user's health have been gaining attention. In particular, smart contact lenses, a next-generation wearable device, can be used to measure the user's blood sugar, perform light therapy, measure intraocular pressure, and administer electronically controlled medication.

[0005] These smart contact lenses require a power supply to operate. However, integrating ultra-small, ultra-thin batteries into these smart contact lenses not only limits their capacity but also poses safety concerns. Furthermore, the limited form factor limits the antenna configuration, necessitating a wireless power supply to operate the smart contact lenses.

[0006] Wireless power is converted into a radio frequency (RF) signal of a specific frequency from the device's transmitter circuit and transmitted to the antenna. The generated magnetic field is induced in the smart contact lens' antenna, allowing electromagnetic wave energy to be transmitted.

[0007] However, users must have and carry a separate transmitter circuit for this wireless power supply, which may cause inconvenience to users.

[0008] This application was conducted as a result of research results from the Ministry of Science and ICT's STEAM Research (Development of Smart Contact Lenses for Diabetic Optical Diagnosis and Treatment) Project (1711195514), the Individual Basic Research (MSIT) Project (Development of Diabetes Diagnosis and Optogenetic Treatment System Using Multifunctional Nanomaterials) (1711191972), and the Inter-Ministry Full-Cycle Medical Device Research and Development Project (MSIT, MOTIE, MOHW) (Smart Contact Lenses for Glaucoma Intraocular Pressure Diagnosis) (1711196706).

[0009]

[0010] The problem to be solved by the present invention is to provide a wireless power charging system that can more conveniently transmit wireless power to smart contact lenses through wireless power supply between wearable devices.

[0011] Another problem that the present invention seeks to solve is to provide a wireless power charging system that can supply wireless power to a smart contact lens over a wider radius and at a longer distance by structurally overcoming the limitations of existing antenna matching circuits.

[0012] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0013]

[0014] A wireless power charging system according to some embodiments of the present invention includes a first device including a first antenna and a transmitting circuit controlling the first antenna, and a second device including a second antenna electromagnetically coupled with the first antenna and a receiving circuit coupled with the second antenna, wherein the first device and the second device include a healthcare device, and the first antenna included in the first device supplies wireless power to the second device through the second antenna included in the second device, and the second device may not include a battery for storing power.

[0015] Additionally, the first device and the second device may include a wearable device that the user can carry.

[0016] In addition, the first device may include a wearable device that the user wears on his / her body, and the second device may include a wearable device that is implantable on the user's body.

[0017] Additionally, the first device may include smart glasses worn on the user's face, and the second device may include smart contact lenses worn on the user's eyes.

[0018] Additionally, the first antenna may include a loop type antenna.

[0019] In addition, the first antenna may include a conductor having a loop shape, a connector connecting the conductor and the transmission circuit, and a capacitor for impedance matching with the transmission circuit.

[0020] Additionally, when the transmission frequency of the first device is 360 MHz or more and 450 MHz or less, the length of the wire may be 10 cm or more and 20 cm or less.

[0021] Additionally, when the transmission frequency of the first device is 360 MHz or more and 450 MHz or less, the capacity of the capacitor may be 0.1 pF or more and 0.3 pF or less.

[0022] In addition, the first device may include a main body, and the main body may include a plurality of insert portions, a plurality of leg portions connected to each of the plurality of insert portions, and a bridge portion connecting between the plurality of insert portions.

[0023] Additionally, the first antenna may be embedded in at least one of the plurality of inserts.

[0024]

[0025] A wireless power charging system according to some embodiments of the present invention structurally overcomes the limitations of existing antenna matching circuits, thereby enabling wireless power supply to smart contact lenses over a wider radius and at a longer distance.

[0026] In addition, the wireless power charging system according to some embodiments of the present invention can more conveniently transfer wireless power to smart contact lenses through wireless power supply between wearable devices. For example, the wireless power charging system according to some embodiments of the present invention can supply wireless power to smart contact lenses through smart glasses, thereby enabling the user to supply power to the smart contact lenses simply by wearing the smart glasses, thereby increasing the convenience of power charging of the smart contact lenses.

[0027] In addition, the wireless power charging system according to some embodiments of the present invention can freely adjust the length of the antenna and the intensity of the transmitted electromagnetic wave.

[0028] In addition to the above-described contents, the specific effects of the present invention are described together with the specific matters for carrying out the invention below.

[0029]

[0030] FIG. 1 is a block diagram of a wireless power charging system according to some embodiments of the present invention.

[0031] FIG. 2 is a conceptual diagram of a wireless power charging system according to some embodiments of the present invention.

[0032] FIG. 3 is a block diagram of a first device according to some embodiments of the present invention.

[0033] FIG. 4 is a drawing illustrating a first device according to some embodiments of the present invention.

[0034] FIG. 5 is a block diagram of a second device according to some embodiments of the present invention.

[0035] FIG. 6 is a drawing illustrating a second device according to some embodiments of the present invention.

[0036] FIGS. 7A to 9 illustrate experimental data for a wireless power charging system according to some embodiments of the present invention.

[0037]

[0038] The terms and words used in this specification and claims should not be interpreted based on their general or dictionary meanings. In accordance with the principle that inventors can define the concepts of terms and words to best describe their inventions, they should be interpreted in a way that is consistent with the technical concept of the present invention. Furthermore, the embodiments described in this specification and the configurations depicted in the drawings are merely examples of how the present invention can be realized and do not fully represent the technical concept of the present invention. Therefore, it should be understood that various equivalents, modifications, and applicable examples may exist as of the time of filing.

[0039] The terms first, second, A, B, etc. used in this specification and claims may be used to describe various components, but the components should not be limited by these terms. These terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term "and / or" includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0040] The terminology used in this specification and claims is for the purpose of describing specific embodiments only and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. It should be understood that terms such as "comprise" or "have" in this application do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification.

[0041] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0042] Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0043] In addition, each configuration, process, procedure or method included in each embodiment of the present invention may be shared within a scope that is not technically inconsistent with each other.

[0044] Hereinafter, with reference to FIGS. 1 to 9, a wireless power charging system according to some embodiments of the present invention will be described in detail.

[0045]

[0046] FIG. 1 is a block diagram of a wireless power charging system according to some embodiments of the present invention. FIG. 2 is a conceptual diagram of a wireless power charging system according to some embodiments of the present invention.

[0047] Referring to FIGS. 1 and 2, a wireless power charging system (1) according to some embodiments of the present invention may include a first device (DV1) and a second device (DV2).

[0048] The first device (DV1) may be a device that supplies wireless power to the second device (DV2).

[0049] As some examples, the first device (DV1) may include a first antenna (hereinafter referred to as “ANT1”) and a transmitter circuit (hereinafter referred to as “TC”) that controls the first antenna (ANT1).

[0050] Hereinafter, a first device (DV1) according to some embodiments of the present invention will be described in more detail with further reference to FIGS. 3 and 4.

[0051]

[0052] FIG. 3 is a block diagram of a first device according to some embodiments of the present invention. FIG. 4 is a drawing for explaining a first device according to some embodiments of the present invention.

[0053] Referring to FIGS. 1 to 4, a first device (DV1) according to some embodiments of the present invention may include a transmitting circuit (TC) and a first antenna (ANT1).

[0054] The transmitter circuit (TC) can control the first antenna (ANT1) to supply wireless power to the second device (DV2).

[0055] As an example, the transmitter circuit (TC) may generate a radio frequency (RF) signal and transmit it to the first antenna (ANT1).

[0056] At this time, the transmission circuit (TC) may include an RF transmitter, a power supply unit, a controller, etc. The RF transmitter may generate an RF signal corresponding to a predefined frequency range (e.g., 360 MHz or more and 450 MHz or less) and transmit the RF signal to the first antenna (ANT1). The power supply unit may supply power to the RF transmitter, etc. The control unit may control the transmission frequency, transmission power, etc. of the RF transmitter. However, the embodiment of the present invention is not limited thereto, and the transmission circuit (TC) may further include an antenna matching circuit that adjusts the impedance with the first antenna (ANT1) to minimize power loss.

[0057] The first antenna (ANT1) can supply wireless power to the second device (DV2) based on an RF signal. In some examples, the first antenna (ANT1) can supply wireless power to the second device (DV2) through a second antenna (ANT2) included in the second device (DV2). In some examples, the first antenna (ANT1) can convert an RF signal transmitted from a transmission circuit (TC) into a magnetic field and emit the converted magnetic field, thereby allowing the second antenna (ANT2) to receive the magnetic field.

[0058] At this time, the first antenna (ANT1) may have a material and structure for generating and emitting a magnetic field.

[0059] For example, the material of the first antenna (ANT1) may include various conductive materials such as copper, copper alloy, stainless steel, spring steel, gallium alloy (EGaIn), etc., but the embodiments of the present invention are not limited thereto.

[0060] As another example, the shape of the first antenna (ANT1) may include a loop shape. In other words, the first antenna (ANT1) may include a loop type antenna.

[0061] For example, the first antenna (ANT1) may include a wire (hereinafter referred to as “W”) having a loop shape, a connector (hereinafter referred to as “CN”) connecting the wire and a transmission circuit, and a capacitor (hereinafter referred to as “CP”) for impedance matching with the transmission circuit.

[0062] The conductor (W1) is a medium that converts an RF signal transmitted from a transmission circuit (TC) into a magnetic field. At this time, the conductor (W1) may have a loop shape. The connector (CN) may connect the transmission circuit (TC) and the conductor (W1). In other words, the connector (CN) may transmit an RF signal from the transmission circuit (TC) to the conductor (W1). At this time, the connector (CN) may include an FFC (Flexible Flat Cable), but the embodiment of the present invention is not limited thereto. At this time, the FFC may include a 5-pin (5Pin) FFC, but the embodiment of the present invention is not limited thereto. The connector (CN) may be connected to the conductor (W1) by soldering. The capacitor (CP) may improve the transmission efficiency of the RF signal by performing impedance matching between the transmission circuit (TC) and the first antenna (ANT1). At this time, the capacitor (CP) may be connected to the conductor (W1) by soldering.

[0063] At this time, the conductor (W1) and capacitor (CP) may have optimal parameters that can improve, optimize, and / or maximize the efficiency of wireless power transfer.

[0064] For example, the conductor (W1) may have an optimal length for the efficiency of wireless power transmission. For example, when the transmission frequency of the first device (DV1) controlled by the transmission circuit (TC) is 360 MHz or more and 450 MHz or less (e.g., 380 MHz), the optimal length of the conductor (W1) may be 10 cm or more and 20 cm or less.

[0065] As another example, the capacitor (CP) may have an optimal capacity for the efficiency of wireless power transfer. For example, when the transmission frequency of the first device (DV1) controlled by the transmission circuit (TC) is 360 MHz or more and 450 MHz or less (e.g., 380 MHz), the optimal capacity of the capacitor (CP) may be 0.1 pF or more and 0.3 pF or less.

[0066] The numerical limitations on the optimal parameters of the conductor (W1) and capacitor (CP) will be described in more detail with reference to FIGS. 7a to 8.

[0067] Meanwhile, the first device (DV1) may include a healthcare device. In other words, the first device (DV1) including the aforementioned transmitting circuit (TC) and first antenna (ANT1) may be a healthcare device for the user's healthcare.

[0068] As some examples, the first device (DV1) may include a wearable device that the user can carry. In other words, the first device (DV1) may be a wearable device that can be attached, worn, implanted, or inserted into the user's body.

[0069] For example, the first device (DV1) may be a wearable device worn by the user on the body. In this case, the user's body may include the face, neck, elbows, wrists, waist, knees, ankles, etc., including the ears, nose, etc., but embodiments of the present invention are not limited thereto.

[0070] For example, the first device (DV1) may include smart glasses worn on the user's face, as illustrated in FIG. 4. That is, the first device (DV1) including the transmitting circuit (TC) and the first antenna (ANT1) as described above may be smart glasses.

[0071] At this time, the first device (DV1) in the form of smart glasses may include a body (hereinafter referred to as “BD”). This body (BD) may have the form of glasses worn by a user. For example, the body (BD) may include a plurality of insert parts (hereinafter referred to as “I”) into which eyeglass lenses are inserted, a bridge connecting the plurality of insert parts (I), and a plurality of leg parts (hereinafter referred to as “L”) connected to each of the plurality of insert parts (I). In other words, the body (BD) may include a first insert part and a second insert part, a first leg part connected to the first insert part, a second leg part connected to the second insert part, and a bridge part connecting the first insert part and the second insert part. At this time, when the main body (BD) is mounted on the user's face, the first insertion part and the first bridge part may be configured to be placed on one side of the user's face (e.g., the left side), the second insertion part and the second bridge part may be configured to be placed on the other side of the user's face (e.g., the right side), and the bridge part may be configured to be placed on the central side of the user's face (e.g., the top of the nose).

[0072] At this time, the aforementioned transmission circuit (TC) and first antenna (ANT1) can be built into the main body (BD).

[0073] For example, the transmitter circuit (TC) can be built into at least one of the insertion portion (I), the leg portion (L), and the bridge portion of the main body (BD).

[0074] As another example, the first antenna (ANT1) may be built into the insertion portion (I). In other words, the first antenna (ANT1) may be arranged inside the insertion portion (I) included in the main body (BD). As an example, as illustrated in FIG. 4, the connector (CN) may be built into one side of the insertion portion (I) closer to the bridge portion (L), and the capacitor (CP) may be built into one side of the insertion portion (I) closer to the bridge portion, and the connector (CN) and the capacitor (CP) may be soldered to the conductor (W1).

[0075] At this time, the arc distance (hereinafter referred to as "AD") between the connector (CN) and the capacitor (CP) in the insertion portion (I) can be determined according to the optimal length of the conductor (W1) as described above. In other words, the arc distance (AD) between the connector (CN) and the capacitor (CP) on the insertion portion (I) can be configured according to the optimal length of the conductor (W1). For example, the arc distance (AD) can include a value obtained by subtracting the length of the connector (CN) from the optimal length of the conductor (W1). For example, when the length of the connector (CN) is 4 cm, the arc distance (AD) can be 11 cm to form 15 cm, which is one of the optimal lengths of the conductor (W1). However, it should be understood that the embodiments of the present invention are not limited thereto.

[0076]

[0077] Referring back to FIGS. 1 and 2 , the second device (DV2) may be a device that operates by receiving wireless power from the first device (DV1). At this time, the second device (DV2) may not include a battery due to structural and design limitations. In other words, the second device (DV2) may not include a battery for storing power.

[0078] As some examples, the second device (DV2) may include a second antenna (hereinafter referred to as “ANT2”) and a receiver circuit (hereinafter referred to as “RC”) that is coupled to the second antenna (ANT2).

[0079] Hereinafter, a second device (DV2) according to some embodiments of the present invention will be described in more detail with further reference to FIGS. 5 and 6.

[0080]

[0081] FIG. 5 is a block diagram of a second device according to some embodiments of the present invention. FIG. 6 is a drawing for explaining a second device according to some embodiments of the present invention.

[0082] Referring to FIGS. 1, 2, 5, and 6, a second device (DV2) according to some embodiments of the present invention may include a second antenna (ANT2), a receiving circuit (RC), and an operating part (hereinafter referred to as “OP”). However, the embodiments of the present invention are not limited thereto, and it is understood that any one of the second antenna (ANT2), the receiving circuit (RC), and the operating part (OP) illustrated in FIG. 5 may be omitted from the second device (DV2), or another configuration not illustrated in FIG. 5 may be included in the second device (DV2).

[0083] The second antenna (ANT2) can receive a magnetic field emitted from the first antenna (ANT1) and convert it into a current. In other words, when an RF signal generated from the transmission circuit (TC) is converted into a magnetic field by the first antenna (ANT1) and emitted, the second antenna (ANT2) can receive the magnetic field and convert the received magnetic field into an RF signal or the like.

[0084] At this time, the second antenna (ANT2) may have a material and structure for receiving a magnetic field and converting it into a current. For example, the material of the second antenna (ANT2) may include various conductive materials such as copper, copper alloy, stainless steel, spring steel, gallium alloy (EGaIn), etc., but the embodiment of the present invention is not limited thereto. As another example, the shape of the second antenna (ANT2) may include a loop shape. In other words, the second antenna (ANT2) may include a loop type antenna. At this time, the second antenna (ANT2) may include a single loop antenna, but the embodiment of the present invention is not limited thereto. For example, the second antenna (ANT2) may include a conductor (W2) having a loop shape. At this time, the conductor (W2) may form a single loop, but the embodiment of the present invention is not limited thereto. Additionally, the second antenna (ANT2) may further include a connector connecting the wire (W2) and the receiving circuit (RC), a capacitor for impedance matching with the receiving circuit (RC), etc.

[0085] The receiving circuit (RC) can convert an RF signal transmitted by the second antenna (ANT2) into power and provide the converted power to a driving unit (OP), etc.

[0086] As some examples, the receiving circuit (RC) may include a converter, a control unit, etc. The converter unit may rectify the induced current transmitted by the second antenna (ANT2) and convert it into DC power. The control unit may store the power generated by the converter unit or distribute it to each component included in the driving unit (OP).

[0087] The driving unit (OP) can operate based on power transmitted from the receiving circuit (RC).

[0088] For example, the driving unit (OP) may include a light emitting unit that emits light of a predetermined intensity, a sensor unit that senses the user's body data from the user's eye, a drug delivery unit that delivers a predefined drug to the user's body, etc. In this case, the light emitting unit, the sensor unit, the drug delivery unit, etc. may be driven by power distributed by the control unit of the receiving circuit (RC).

[0089] Meanwhile, the second device (DV2) may include a healthcare device. In other words, the second device (DV2), which includes the second antenna (ANT2), the receiving circuit (RC), the driving unit (OP), etc. as described above, may be a healthcare device for the user's healthcare.

[0090] As an example, the second device (DV2) may include a wearable device that the user can carry. In other words, the second device (DV2) may be a wearable device that can be attached, worn, implanted, or inserted into the user's body.

[0091] For example, the second device (DV2) may be a wearable device that the user implants into the body. In this case, the user's body may include the face, neck, elbows, wrists, waist, knees, ankles, etc., including ears, nose, and eyes, but embodiments of the present invention are not limited thereto.

[0092] For example, the second device (DV2) may include a smart contact lens worn on the user's eye, as illustrated in FIG. 6. That is, the second device (DV2) including the second antenna (ANT2), the receiving circuit (RC), the driving unit (OP), etc., as described above, may be a smart contact lens.

[0093] The second device (DV2) in the form of a smart contact lens can operate by receiving wireless power from the first device (DV1) in the form of smart glasses.

[0094]

[0095] FIGS. 7A to 9 illustrate experimental data for a wireless power charging system according to some embodiments of the present invention.

[0096] Referring to FIGS. 1 to 9, more specifically, FIGS. 7a and 7b are experimental data regarding the optimal length of the wire (W1) of the first antenna (ANT1), FIG. 8 is experimental data regarding the optimal capacity of the capacitor (CP) of the first antenna (ANT1), and FIG. 9 is experimental data for proving the transparency of wireless power transmission of a wireless power charging system according to some embodiments of the present invention.

[0097] First, Fig. 7a shows the results of performing a Bright Area Analysis on the second device (DV2) while varying the length and thickness of the wire (W1) of the first antenna (ANT1). At this time, Fig. 7a <a1>is experimental data in the case where there are no passive circuit elements such as inductors and capacitors (CP) in the first antenna (ANT1), and Fig. 7a. <a2>This is experimental data when passive circuit elements such as inductors and capacitors (CP) do not exist in the first antenna (ANT1). In this case, Fig. 7a <a1>and <a2>As shown in FIG. 7A, when the length of the first antenna (ANT1) is 10 cm or more and 20 cm or less, it can be seen that wireless power transmission to the second device (DV2) is smoothly performed, and the brightness area of ​​the LED of the second device (DV2) is high. In particular, FIG. 7A <a1>As shown in FIG. 7a, when there are no passive circuit elements such as inductors and capacitors (CP) in the first antenna (ANT1), wireless power transfer is the smoothest when the length of the first antenna (ANT1) is 15 cm. <a2>As shown in FIG. 1 , when passive circuit elements such as an inductor and a capacitor (CP) are present in the first antenna (ANT1), it can be seen that wireless power transmission is most smooth when the length of the first antenna (ANT1) is 10 cm.

[0098] On the other hand, if the length of the first antenna (ANT1) exceeds 25 cm as shown in Fig. 7b, wireless power transmission to the second device (DV2) may not be smooth. That is, in Fig. 7b <b1>In the case where the length of the first antenna (ANT1) is implemented as 25 cm, Fig. 7b <b2>This is a case where the length of the first antenna (ANT1) is implemented as 30 cm, and in both cases, it can be seen that power transmission is not smooth enough to drive the LED of the second device (DV2) located in the middle area of ​​the first antenna (ANT1).

[0099] Accordingly, in some examples, at a transmission frequency (e.g., 360 MHz or more and 450 MHz or more), the length of the wire (W1) of the first antenna (ANT1) of the present invention may be 10 cm or more and 20 cm or less, but the embodiments of the present invention are not limited thereto.

[0100] Fig. 8 illustrates the results of performing a Bright Area Analysis on the second device (DV2) while varying the capacitance of the capacitor (CP) of the first antenna (ANT1). As illustrated in Fig. 8, when the capacitance of the capacitor (CP) of the first antenna (ANT1) is 0.5 pF or less, it can be seen that wireless power transfer to the second device (DV2) is smoothly performed, and the brightness area of ​​the LED of the second device (DV2) is high. In particular, it can be seen that wireless power transfer is the smoothest when the capacitance of the capacitor (CP) of the first antenna (ANT1) is 0.1 pF or more and 0.3 pF or less.

[0101] Accordingly, at a transmission frequency according to some examples (e.g., 360 MHz or more and 450 MHz or more), the capacitance of the capacitor (CP) of the first antenna (ANT1) of the present invention may be 0.1 pF or more and 0.3 pF or less, but the embodiments of the present invention are not limited thereto.

[0102] FIG. 9 is experimental data for proving the wireless power transmission transparency of a wireless power charging system (1) according to some embodiments of the present invention. In the experimental process of FIG. 9, it was confirmed that the magnetic field emitted by the first device (DV1) can penetrate silicone artificial skin having a thickness of approximately 21 mm and animal (pig) skin having a thickness of approximately 3 mm, respectively, and drive the second device (DV2) located under each skin. Accordingly, even when the second device (DV2) is worn on the eye of the human body in the form of a smart contact lens, the wireless power charging system (1) according to some embodiments of the present invention can perform wireless power transfer.

[0103] The above description is merely an example of the technical idea of ​​the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present embodiment, but rather to explain it, and the scope of the technical idea of ​​the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

Claims

1. A first device including a first antenna and a transmitting circuit for controlling the first antenna; and A second device comprising a second antenna electromagnetically coupled with the first antenna and a receiving circuit coupled with the second antenna, The first device and the second device include a healthcare device, The first antenna included in the first device supplies wireless power to the second device through the second antenna included in the second device, The second device does not include a battery for storing power. Wireless power charging system.

2. In paragraph 1, The first device and the second device include a wearable device that the user can carry. Wireless power charging system.

3. In paragraph 2, The first device includes a wearable device that the user wears on his / her body, The second device includes a wearable device that is implantable into the user's body. Wireless power charging system.

4. In paragraph 3, The first device includes smart glasses worn on the user's face, The second device includes a smart contact lens worn on the user's eye. Wireless power charging system.

5. In paragraph 4, The above first antenna, Including a loop type antenna Wireless power charging system.

6. In paragraph 5, The above first antenna, A wire having a loop shape, A connector connecting the above conductor and the above transmission circuit, Including a capacitor for impedance matching with the above transmission circuit Wireless power charging system.

7. In paragraph 6, If the transmission frequency of the first device is 360 MHz or more and 450 MHz or less, The length of the above wire is 10 cm or more and 20 cm or less. Wireless power charging system.

8. In paragraph 6, If the transmission frequency of the first device is 360 MHz or more and 450 MHz or less, The capacity of the above capacitor is 0.1 pF or more and 0.3 pF or less. Wireless power charging system.

9. In paragraph 6, The first device includes a main body, The above body includes a plurality of insert portions, a plurality of leg portions connected to each of the plurality of insert portions, and a bridge portion connecting between the plurality of insert portions. Wireless power charging system.

10. In paragraph 9, The above first antenna is built into at least one of the plurality of inserts. Wireless power charging system.

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