Wireless charger with electromagnetic shielding function

Abstract

The present invention discloses a wireless charger with electromagnetic shielding function to effectively shield electromagnetic waves generated in a transmitting coil of the wireless charger. The wireless charger includes a transmitting coil that generates a magnetic field through a high-frequency signal. The wireless charger further includes at least two electromagnetic wave shielding filters, which are located on the transmitting coil and shield the electromagnetic waves generated in the transmitting coil.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based upon and claims the benefit of priority from Korean Patent Application No. 10-2018-0070946, filed on June 20, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. Technical Field

[0003] The present disclosure relates to a wireless charger with electromagnetic shielding function. Background Art

[0004] Wireless power transmission technology is mainly used in the field of smartphones. Recently, wireless power transmission technology has gradually expanded to wearable devices, the Internet of Things (IoT), electric vehicle charging stations, etc. As the power transmitted increases from low output to high output, people are paying more and more attention to the emission of electromagnetic waves. In these examples, electromagnetic waves include electromagnetic interference (EMI) noise, electromagnetic compatibility (EMC) noise, etc., excluding the signal to be transmitted.

[0005] In order to wirelessly transmit power, a transmitting circuit for generating high-output and high-frequency power, a coil for transmitting high-output and high-frequency power, and a receiving circuit are required. Since the transmitting circuit for generating power mostly uses a square wave, harmonic signals other than the power transmission frequency can be conducted or radiated through the wire. Alternatively, the harmonic signal can be directly transmitted to the outside through the power transmission coil.

[0006] Because such harmonic signals may cause component failure in the circuit or interfere with other devices around the wireless power transmission device, such harmonic signals must be reduced.

[0007] The problems of the prior art have been described above. However, it is not obvious to a person skilled in the art to which the present disclosure pertains that these problems are to be solved. Summary of the invention

[0008] The present disclosure aims to solve the above-mentioned problems existing in the prior art while maintaining the advantages achieved by the prior art.

[0009] Since some devices around the wireless power transmission device are sensitive to electromagnetic waves, strict electromagnetic wave intensity limits must be imposed on power signals other than the power transmission frequency. In order to use a wireless power transmission device such as a wireless charger together with such a device that is sensitive to electromagnetic waves, electromagnetic wave intensity limits must be maintained. One aspect of the present disclosure provides a wireless charger having at least two electromagnetic wave shielding filters, at least two electromagnetic wave shielding filters being installed at specific positions on a transmitting coil of the wireless charger, thereby effectively shielding the electromagnetic waves generated in the transmitting coil. The present disclosure relates to a technology for effectively shielding electromagnetic waves generated in a transmitting coil of a wireless charger using an electromagnetic wave shielding filter.

[0010] The purpose of the present disclosure is not limited to the above-mentioned purpose, and any other purpose and advantage not mentioned herein will be clearly understood from the following description. The inventive concept will be more clearly understood from the embodiments of the present disclosure. In addition, it will be apparent that the purposes and advantages of the present disclosure can be achieved by the elements and combinations thereof claimed in the claims.

[0011] According to one aspect of the present disclosure, a wireless charger with an electromagnetic shielding function may include a transmitting coil that generates a magnetic field through a high-frequency signal. The wireless charger may further include at least two electromagnetic wave shielding filters, which are located on the transmitting coil and shield the electromagnetic waves generated in the transmitting coil.

[0012] The electromagnetic wave shielding filter may be spaced apart from the transmitting coil, have a reference height (eg, 1 mm, 3 mm, 5 mm, 10 mm, etc.) above the transmitting coil, and be positioned parallel to the transmitting coil.

[0013] The transmitting coil may include a single transmitting coil. When the center point of each electromagnetic wave shielding filter is the foot of perpendicular, a perpendicular line passing through the center point may intersect the transmitting coil perpendicularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description in conjunction with the accompanying drawings:

[0015] Figure 1 The structure of a wireless charging system with a wireless charger according to an embodiment of the present disclosure is shown;

[0016] Figure 2 shows a configuration of a wireless charging system having a wireless charger according to an embodiment of the present disclosure;

[0017] Figure 3 The structure of the electromagnetic wave shielding filter used in the wireless charger according to the embodiment of the present disclosure is shown;

[0018] 4A to 4F An example of the structure of a wireless charger with an electromagnetic shielding function according to an embodiment of the present disclosure is shown;

[0019] FIG. 5A to FIG. 5G An example of the structure of a wireless charger with an electromagnetic shielding function according to another embodiment of the present disclosure is shown; and

[0020] FIG. 6A to FIG. 6I An example of the structure of a wireless charger having an electromagnetic shielding function according to another embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure are described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are always used to represent the same or equivalent elements. In addition, detailed descriptions of known technologies associated with the present disclosure are omitted to avoid unnecessarily obscuring the subject matter of the present disclosure.

[0022] Terms such as first, second, A, B, (a) and (b) can be used to describe the elements in the embodiments of the present disclosure. These terms are only used to distinguish one element from another element. The inherent characteristics, order or sequence of the corresponding elements, etc. are not limited by these terms. Unless otherwise defined, all terms including technology or scientific terms used herein have the same meaning as the meaning generally understood by those of ordinary skill in the field to which the present disclosure belongs. Terms such as those defined in common dictionaries will be interpreted as having the meaning equivalent to the contextual meaning in the relevant technical field. These terms are not interpreted as having ideal or overly formal meanings, unless clearly defined as having such meanings in the present application.

[0023] Figure 1 The structure of a wireless charging system 100 having a wireless charger 120 according to an embodiment of the present disclosure is shown.

[0024] like Figure 1 As shown, the wireless charging system 100 having the wireless charger 120 can wirelessly transmit power using magnetic induction or magnetic resonance formed between the transmitting coil 121 of the wireless charger 120 and the receiving coil 131 of the portable terminal 130. The wireless charger 120 may be a wireless power transmitting device. The portable terminal 130 may be a wireless power receiving device.

[0025] The transmitting circuit 122 of the wireless charger 120 may generate a high frequency signal required for wirelessly transmitting power. When the generated high frequency signal is input to the transmitting coil 121, a magnetic field may be generated. When the magnetic field generated in the transmitting coil 121 passes through the receiving coil 131 of the portable terminal 133, an induced current may be generated. The induced current may be rectified in the receiving circuit 132. Then, the induced current may be stored in the battery of the portable terminal.

[0026] The transmitting coil 121 and the receiving coil 131 may be formed of a wire having high conductivity. In the case where the energy to be transmitted is a magnetic field, a solenoid type coil or a helical type coil may be mainly used.

[0027] In order to improve the power transmission efficiency of the wireless charging system, a circuit for impedance matching may be additionally connected to the input terminal of the transmitting coil 121 or the output terminal of the receiving coil 131 .

[0028] Figure 2 The configuration of the wireless charging system 100 having the wireless charger 120 according to an embodiment of the present disclosure is shown. In this example, the wireless charging system 100 including multiple transmitting coils is shown. In another example, the wireless charger 120 can also be applied to the wireless charging system 100 including a single transmitting coil.

[0029] like Figure 2 As shown, the wireless charging system 100 including the wireless charger 120 according to an embodiment of the present disclosure may be a general system for wirelessly transmitting power by selectively using a transmitting coil 121, wherein the transmitting coil 121 may be a plurality of transmitting coils 121-1 to 121-n. In this example, the system may include: a wireless charger 120 that receives power from a power source 110 and wirelessly transmits the power; and a portable terminal 130 that supplies power from the wireless charger 120 to a load 140. The load 140 may include a battery of the portable terminal 130.

[0030] The wireless charger 120 may include: a transmitting circuit 122 including a power control circuit 122-1 for controlling power supplied to the transmitting coils 121-1 to 121-n, a main capacitor 122-2 for constituting a resonant circuit, and a plurality of switches 122-3 for selectively providing a high-frequency signal to one of the transmitting coils 121-1 to 121-n; and the transmitting coils 121-1 to 121-n. In this example, the transmitting circuit 122 may provide the high-frequency signal to all the transmitting coils 121-1 to 121-n in common.

[0031] The portable terminal 130 may include a receiving coil 131 for receiving power from the transmitting coil 121. The portable terminal 130 may further include a receiving circuit 132 including a secondary capacitor 132-1 for constituting a resonant circuit and a rectifying and controlling unit 132-2 for rectifying and controlling the received power. In this example, the transmitting coil 121 and the receiving coil 131 may include an induction coil and a resonant coil, but will be collectively referred to as a transmitting coil and a receiving coil.

[0032] The power generated by the power supply 110 may be transmitted to the wireless charger 120. The power transmitted to the wireless charger 120 may be converted into a transmission resonant frequency and transmitted to the portable terminal 130 having the same resonant frequency as the transmission resonant frequency. The power transmitted to the wireless charger 120 may be supplied to one of the plurality of transmitting coils 121-1 to 121-n through the power control circuit 122-1. In the receiving coil 131 of the portable terminal 130, the received resonant frequency power may be induced in the form of alternating current (AC). The rectifying and control unit 132-2 may rectify the induced power and transmit the rectified power to the load 140.

[0033] The transmitting coil 121 and the receiving coil 131 may be a solenoid type coil, a spiral type coil, etc. In addition, the transmitting coil 121 may include two or more transmitting coils, and one of the transmitting coils 121-1 to 121-n may be selected to transmit power to the receiving coil 131 by considering the most favorable position for impedance matching with the receiving coil 131 according to the position of the portable terminal 130 approaching. By charging the portable terminal 130 at the most favorable position for impedance matching between the transmitting coils 121-1 to 121-n and the receiving coil 131, the power transmission efficiency between the wireless charger 120 and the portable terminal 130 may be significantly improved.

[0034] Figure 3 The structure of the electromagnetic wave shielding filter 300 used in the wireless charger 120 according to the embodiment of the present disclosure is shown.

[0035] like Figure 3 As shown, the electromagnetic wave shielding filter 300 used in the wireless charger 120 may include a coil (shielding coil) 310 formed as a closed loop and a capacitor 320 connecting both ends (starting point and end point) of the coil 310. In this example, the number of turns of the coil 310 may vary according to the specifications (charging voltage, etc.) of the wireless charger 120. The coil 310 may be surrounded by an insulator such as a wire sheath. The coil 310 may be provided in various shapes, such as a circle, an ellipse, and a polygon.

[0036] The closed-loop coil 310 for shielding the magnetic field can generate an anti-phase magnetic field (phase difference of 180 degrees) for eliminating the leakage magnetic field generated in the transmitting coil of the wireless charger 120, so that the anti-phase magnetic field can eliminate (shield) the leakage magnetic field generated by the transmitting coil. In this example, when current flows in the coil for wireless power transmission, a leakage magnetic field is generated near the transmitting coil. The leakage magnetic field may have an adverse effect on, for example, the user's body or peripheral electronic devices. In addition, the elimination of the leakage magnetic field ultimately indicates a reduction in electromagnetic waves.

[0037] The capacitor 320 connected to both ends of the closed loop can adjust the resonant frequency (resonance point) of the closed loop to control the phase and strength of the current induced in the closed loop, thereby generating an anti-phase magnetic field with the same strength as the leakage magnetic field, thereby completely eliminating the leakage magnetic field. In this example, unlike the method of using ferrite or metal shielding to shield the leakage magnetic field, the capacitor is used to shield the leakage magnetic field, so that a relatively small size and lightweight design can be achieved.

[0038] The inductance of the closed-loop type coil 310 may be 0.01 μH-100 μH, and the capacitance of the capacitor 320 may be 10 pF-100 μF.

[0039] 4A to 4F An example of the structure of a wireless charger 120 having an electromagnetic shielding function according to an embodiment of the present disclosure is shown. 4A to 4F It also shows the optimal installation positions of the respective electromagnetic wave shielding filters 410 to 427 when the wireless charger 120 includes a single transmitting coil 12 .

[0040] Hereinafter, the electromagnetic wave shielding filters 410 to 427 may be located at the same height relative to the transmitting coil 12 and parallel to the transmitting coil 12, and the height may be within 10 mm. In addition, each of the electromagnetic wave shielding filters 410 to 427 may have any shape as long as it has inductance. In addition, the shape of each electromagnetic wave shielding filter is shown in a simplified form, and the structure is the same as Figure 3 The structure shown in is the same.

[0041] Figure 4A An example is shown including a first electromagnetic wave shield filter 410 and a second electromagnetic wave shield filter 411. In this example, the first electromagnetic wave shield filter 410 and the second electromagnetic wave shield filter 411 may have the same structure (size, shape, thickness, etc.).

[0042] like Figure 4AAs shown, the first electromagnetic wave shielding filter 410 may be located on the left side of the transmitting coil 12. The second electromagnetic wave shielding filter 411 may be located on the right side of the transmitting coil 12. In this example, the center point 450 of the first electromagnetic wave shielding filter 410 and the center point 451 of the second electromagnetic wave shielding filter 411 may be located on the transmitting coil 12. In other words, the center point 450 of the first electromagnetic wave shielding filter 410 is the foot of the vertical. The vertical line passing through the center point 450 intersects the transmitting coil 12 perpendicularly. Similarly, the center point 451 of the second electromagnetic wave shielding filter 411 is the foot of the vertical. The vertical line passing through the center point 451 intersects the transmitting coil 12 perpendicularly.

[0043] Figure 4B An example is shown including a first electromagnetic wave shield filter 412 and a second electromagnetic wave shield filter 413. In this example, the first electromagnetic wave shield filter 412 and the second electromagnetic wave shield filter 413 may have the same structure.

[0044] like Figure 4B As shown, the first electromagnetic wave shielding filter 412 may be located at the upper end on the transmitting coil 12. The second electromagnetic wave shielding filter 413 may be located at the lower end on the transmitting coil 12. In this example, the center point 452 of the first electromagnetic wave shielding filter 412 and the center point 453 of the second electromagnetic wave shielding filter 413 may be located on the transmitting coil 12. In other words, the center point 452 of the first electromagnetic wave shielding filter 412 is the foot of the vertical, and the vertical line passing through the center point 452 intersects the transmitting coil 12 perpendicularly. Similarly, the center point 453 of the second electromagnetic wave shielding filter 413 is the foot of the vertical. The vertical line passing through the center point 453 intersects the transmitting coil 12 perpendicularly.

[0045] Figure 4C An example is shown including a first electromagnetic wave shielding filter 414, a second electromagnetic wave shielding filter 415, and a third electromagnetic wave shielding filter 416. In this example, the second electromagnetic wave shielding filter 415 and the third electromagnetic wave shielding filter 416 may have the same structure, but the structures of the second electromagnetic wave shielding filter 415 and the third electromagnetic wave shielding filter 416 may be different from the structure of the first electromagnetic wave shielding filter 414.

[0046] like Figure 4CAs shown, the first electromagnetic wave shielding filter 414 may be located on the left side of the transmitting coil 12, the second electromagnetic wave shielding filter 415 may be located on the upper right side of the transmitting coil 12, and the third electromagnetic wave shielding filter 416 may be located on the lower right side of the transmitting coil 12. In this example, the center point 454 of the first electromagnetic wave shielding filter 414, the center point 455 of the second electromagnetic wave shielding filter 415, and the center point 456 of the third electromagnetic wave shielding filter 416 may be located on the transmitting coil 12. In other words, the center point 454 of the first electromagnetic wave shielding filter 414 is the foot of the vertical line. The vertical line passing through the center point 454 intersects the transmitting coil 12 perpendicularly. Similarly, the center point 455 of the second electromagnetic wave shielding filter 415 is the foot of the vertical line. The vertical line passing through the center point 455 intersects the transmitting coil 12 perpendicularly. In addition, the center point 456 of the third electromagnetic wave shielding filter 416 is the foot of the vertical line. The vertical line passing through the center point 456 intersects the transmitting coil 12 perpendicularly.

[0047] Figure 4D An example is shown including a first electromagnetic wave shielding filter 417, a second electromagnetic wave shielding filter 418, and a third electromagnetic wave shielding filter 419. In this example, the second electromagnetic wave shielding filter 418 and the third electromagnetic wave shielding filter 419 may have the same structure, but the structures of the second electromagnetic wave shielding filter 418 and the third electromagnetic wave shielding filter 419 may be different from the structure of the first electromagnetic wave shielding filter 417.

[0048] like Figure 4D As shown, the first electromagnetic wave shielding filter 417 may be located at the upper end of the transmitting coil 12. The second electromagnetic wave shielding filter 418 may be located at the lower left side of the transmitting coil 12, and the third electromagnetic wave shielding filter 419 may be located at the lower right side of the transmitting coil 12. In this example, the center point of the first electromagnetic wave shielding filter 417, the center point of the second electromagnetic wave shielding filter 418, and the center point of the third electromagnetic wave shielding filter 419 may be located on the transmitting coil 12.

[0049] Figure 4E An example is shown including a first electromagnetic wave shielding filter 420, a second electromagnetic wave shielding filter 421, a third electromagnetic wave shielding filter 422, and a fourth electromagnetic wave shielding filter 423. In this example, the first electromagnetic wave shielding filter 420, the second electromagnetic wave shielding filter 421, the third electromagnetic wave shielding filter 422, and the fourth electromagnetic wave shielding filter 423 may have the same structure.

[0050] like Figure 4EAs shown, the first electromagnetic wave shielding filter 420 may be located on the upper left side of the transmitting coil 12, and the second electromagnetic wave shielding filter 421 may be located on the upper right side of the transmitting coil 12. The third electromagnetic wave shielding filter 422 may be located on the lower left side of the transmitting coil 12, and the fourth electromagnetic wave shielding filter 423 may be located on the lower right side of the transmitting coil 12. In this example, the center point of the first electromagnetic wave shielding filter 420, the center point of the second electromagnetic wave shielding filter 421, the center point of the third electromagnetic wave shielding filter 422, and the center point of the fourth electromagnetic wave shielding filter 423 may be located on the transmitting coil 12.

[0051] Figure 4F An example is shown including a first electromagnetic wave shielding filter 424, a second electromagnetic wave shielding filter 425, a third electromagnetic wave shielding filter 426, and a fourth electromagnetic wave shielding filter 427. In this example, the first electromagnetic wave shielding filter 424, the second electromagnetic wave shielding filter 425, the third electromagnetic wave shielding filter 426, and the fourth electromagnetic wave shielding filter 427 may have the same structure.

[0052] like Figure 4F As shown, the first electromagnetic wave shielding filter 424 may be located at the upper end of the transmitting coil 12, the second electromagnetic wave shielding filter 425 may be located at the left side of the transmitting coil 12, the third electromagnetic wave shielding filter 426 may be located at the right side of the transmitting coil 12, and the fourth electromagnetic wave shielding filter 427 may be located at the lower end of the transmitting coil 12. In this example, the center point of the first electromagnetic wave shielding filter 424, the center point of the second electromagnetic wave shielding filter 425, the center point of the third electromagnetic wave shielding filter 426, and the center point of the fourth electromagnetic wave shielding filter 427 may be located on the transmitting coil 12.

[0053] FIG. 5A to FIG. 5G An example of the structure of a wireless charger 120 having an electromagnetic shielding function according to another embodiment of the present disclosure is shown. FIG. 5A to FIG. 5G It also shows the optimal installation positions of the respective electromagnetic wave shielding filters 510 to 543 when the wireless charger 120 includes two transmitting coils 13 and 14 .

[0054] Hereinafter, the first transmitting coil 13 and the second transmitting coil 14 may be located in the same plane. The electromagnetic wave shielding filters 510 to 543 may be located at the same height relative to the first transmitting coil 13, and the height may be within 10 mm. In addition, each of the electromagnetic wave shielding filters 510 to 543 may have any shape as long as it has inductance.

[0055] Figure 5AAn example is shown including a first electromagnetic wave shield filter 510 and a second electromagnetic wave shield filter 511. In this example, the first electromagnetic wave shield filter 510 and the second electromagnetic wave shield filter 511 may have the same structure.

[0056] like Figure 5A As shown, the first electromagnetic wave shielding filter 510 may be located on the first transmitting coil 13, overlapping each other. The second electromagnetic wave shielding filter 511 may be located on the second transmitting coil 14, overlapping each other. In this example, the center point 550 of the first electromagnetic wave shielding filter 510 may not be located on the first transmitting coil 13. The center point 551 of the second electromagnetic wave shielding filter 511 may not be located on the second transmitting coil 14. In other words, the center point 550 of the first electromagnetic wave shielding filter 510 may overlap with the center point of the first transmitting coil 13. The center point 551 of the second electromagnetic wave shielding filter 511 may overlap with the center point of the second transmitting coil.

[0057] Figure 5B An example is shown including the first electromagnetic wave shield filter 512, the second electromagnetic wave shield filter 513, and the third electromagnetic wave shield filter 514. In this example, the first electromagnetic wave shield filter 512, the second electromagnetic wave shield filter 513, and the third electromagnetic wave shield filter 514 may have the same structure.

[0058] like Figure 5B As shown, the first electromagnetic wave shielding filter 512 may be located at the upper end on the first transmitting coil 13. The second electromagnetic wave shielding filter 513 may be located on the first transmitting coil 13 and the second transmitting coil 14. The third electromagnetic wave shielding filter 514 may be located at the lower end on the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 512 may be located on the first transmitting coil 13. The center point of the second electromagnetic wave shielding filter 513 may be located on the first transmitting coil 13 or the second transmitting coil 14. The center point of the third electromagnetic wave shielding filter 514 may be located on the second transmitting coil 14.

[0059] Figure 5C An example is shown including a first electromagnetic wave shielding filter 515, a second electromagnetic wave shielding filter 516, a third electromagnetic wave shielding filter 517, and a fourth electromagnetic wave shielding filter 518. In this example, the first electromagnetic wave shielding filter 515, the second electromagnetic wave shielding filter 516, the third electromagnetic wave shielding filter 517, and the fourth electromagnetic wave shielding filter 518 may have the same structure.

[0060] like Figure 5CAs shown, the first electromagnetic wave shielding filter 515 may be located on the left side of the first transmitting coil 13, and the second electromagnetic wave shielding filter 516 may be located on the right side of the first transmitting coil 13. The third electromagnetic wave shielding filter 517 may be located on the left side of the second transmitting coil 14, and the fourth electromagnetic wave shielding filter 518 may be located on the right side of the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 515 and the center point of the second electromagnetic wave shielding filter 516 may be located on the first transmitting coil 13. The center point of the third electromagnetic wave shielding filter 517 and the center point of the fourth electromagnetic wave shielding filter 518 may be located on the second transmitting coil 14.

[0061] Figure 5D An example is shown including a first electromagnetic wave shielding filter 519, a second electromagnetic wave shielding filter 520, a third electromagnetic wave shielding filter 521, a fourth electromagnetic wave shielding filter 522, and a fifth electromagnetic wave shielding filter 523. In this example, the first electromagnetic wave shielding filter 519, the second electromagnetic wave shielding filter 520, the fourth electromagnetic wave shielding filter 522, and the fifth electromagnetic wave shielding filter 523 may have the same structure.

[0062] like Figure 5D As shown, the first electromagnetic wave shielding filter 519 may be located on the upper left side of the first transmitting coil 13, and the second electromagnetic wave shielding filter 520 may be located on the upper right side of the first transmitting coil 13. The third electromagnetic wave shielding filter 521 may be located on the first transmitting coil 13 and the second transmitting coil 14. The fourth electromagnetic wave shielding filter 522 may be located on the lower left side of the second transmitting coil 14, and the fifth electromagnetic wave shielding filter 523 may be located on the lower left side of the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 519 and the center point of the second electromagnetic wave shielding filter 520 may be located on the first transmitting coil 13. The center point of the third electromagnetic wave shielding filter 521 may be located on the first transmitting coil 13 or the second transmitting coil 14. The center point of the fourth electromagnetic wave shielding filter 522 and the center point of the fifth electromagnetic wave shielding filter 523 may be located on the second transmitting coil 14.

[0063] Figure 5E An example is shown including a first electromagnetic wave shielding filter 524, a second electromagnetic wave shielding filter 525, a third electromagnetic wave shielding filter 526, a fourth electromagnetic wave shielding filter 527, a fifth electromagnetic wave shielding filter 528, and a sixth electromagnetic wave shielding filter 529. In this example, the first electromagnetic wave shielding filter 524, the second electromagnetic wave shielding filter 525, the third electromagnetic wave shielding filter 526, the fourth electromagnetic wave shielding filter 527, the fifth electromagnetic wave shielding filter 528, and the sixth electromagnetic wave shielding filter 529 may have the same structure.

[0064] like Figure 5E As shown, the first electromagnetic wave shielding filter 524 may be located on the upper left side of the first transmitting coil 13, and the second electromagnetic wave shielding filter 525 may be located on the upper right side of the first transmitting coil 13. The third electromagnetic wave shielding filter 526 may be located on the left side of the first transmitting coil 13 and the second transmitting coil 14. The fourth electromagnetic wave shielding filter 527 may be located on the right side of the first transmitting coil 13 and the second transmitting coil 14. The fifth electromagnetic wave shielding filter 528 may be located on the lower left side of the second transmitting coil 14, and the sixth electromagnetic wave shielding filter 529 may be located on the lower right side of the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 524 and the center point of the second electromagnetic wave shielding filter 525 may be located on the first transmitting coil 13. The center point of the third electromagnetic wave shielding filter 526 and the center point of the fourth electromagnetic wave shielding filter 527 may not be located on the first transmitting coil 13 or the second transmitting coil 14. The center point of the fifth electromagnetic wave shielding filter 528 and the center point of the sixth electromagnetic wave shielding filter 529 may be located on the second transmitting coil 14.

[0065] Fig. 5F An example including a first electromagnetic wave shielding filter 530, a second electromagnetic wave shielding filter 531, a third electromagnetic wave shielding filter 532, a fourth electromagnetic wave shielding filter 533, a fifth electromagnetic wave shielding filter 534, and a sixth electromagnetic wave shielding filter 535 is shown. In this example, the first electromagnetic wave shielding filter 530, the second electromagnetic wave shielding filter 531, the fifth electromagnetic wave shielding filter 534, and the sixth electromagnetic wave shielding filter 535 may have the same structure. The third electromagnetic wave shielding filter 532 and the fourth electromagnetic wave shielding filter 533 may have the same structure.

[0066] like Fig. 5FAs shown, the first electromagnetic wave shielding filter 530 may be located on the upper left side of the first transmitting coil 13, and the second electromagnetic wave shielding filter 531 may be located on the upper right side of the first transmitting coil 13. The third electromagnetic wave shielding filter 532 may be located at the lower end of the first transmitting coil 13. The fourth electromagnetic wave shielding filter 533 may be located at the upper end of the second transmitting coil 14. The fifth electromagnetic wave shielding filter 534 may be located on the lower left side of the second transmitting coil 14. The sixth electromagnetic wave shielding filter 535 may be located on the lower right side of the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 530, the center point of the second electromagnetic wave shielding filter 531, and the center point of the third electromagnetic wave shielding filter 532 may be located on the first transmitting coil 13. The center point of the fourth electromagnetic wave shielding filter 533, the center point of the fifth electromagnetic wave shielding filter 534, and the center point of the sixth electromagnetic wave shielding filter 535 may be located on the second transmitting coil 14.

[0067] Figure 5G An example is shown including a first electromagnetic wave shielding filter 536, a second electromagnetic wave shielding filter 537, a third electromagnetic wave shielding filter 538, a fourth electromagnetic wave shielding filter 539, a fifth electromagnetic wave shielding filter 540, a sixth electromagnetic wave shielding filter 541, a seventh electromagnetic wave shielding filter 542, and an eighth electromagnetic wave shielding filter 543. In this example, the first electromagnetic wave shielding filter 536, the second electromagnetic wave shielding filter 537, the third electromagnetic wave shielding filter 538, the fourth electromagnetic wave shielding filter 539, the fifth electromagnetic wave shielding filter 540, the sixth electromagnetic wave shielding filter 541, the seventh electromagnetic wave shielding filter 542, and the eighth electromagnetic wave shielding filter 543 may have the same structure.

[0068] like Figure 5GAs shown, the first electromagnetic wave shielding filter 536 may be located on the upper left side of the first transmitting coil 13, and the second electromagnetic wave shielding filter 537 may be located on the upper right side of the first transmitting coil 13. The third electromagnetic wave shielding filter 538 may be located on the lower left side of the first transmitting coil 13, and the fourth electromagnetic wave shielding filter 539 may be located on the lower right side of the first transmitting coil 13. The fifth electromagnetic wave shielding filter 540 may be located on the upper left side of the second transmitting coil 14, and the sixth electromagnetic wave shielding filter 541 may be located on the upper right side of the second transmitting coil 14. The seventh electromagnetic wave shielding filter 542 may be located on the lower left side of the second transmitting coil 14, and the eighth electromagnetic wave shielding filter 543 may be located on the lower right side of the second transmitting coil 14. In this example, the center point of the first electromagnetic wave shielding filter 536, the center point of the second electromagnetic wave shielding filter 537, the center point of the third electromagnetic wave shielding filter 538, and the center point of the fourth electromagnetic wave shielding filter 539 may be located on the first transmitting coil 13. The center points of the fifth electromagnetic wave shielding filter 540 , the sixth electromagnetic wave shielding filter 541 , the seventh electromagnetic wave shielding filter 542 , and the eighth electromagnetic wave shielding filter 543 may be located on the second transmitting coil 14 .

[0069] FIG. 6A to FIG. 6I An example of the structure of a wireless charger 120 having an electromagnetic shielding function according to another embodiment of the present disclosure is shown. FIG. 6A to FIG. 6I Optimal installation positions of the respective electromagnetic wave shielding filters 610 to 652 are shown when the wireless charger 120 includes three transmitting coils 15 , 16 , and 17 .

[0070] Hereinafter, the first transmitting coil 15 and the second transmitting coil 16 may be located on the same plane (same layer). The third transmitting coil 17 may be located on a higher layer than the first transmitting coil 15. In addition, in one example, the electromagnetic wave shielding filters 610 to 652 may be located at the same height relative to the first transmitting coil 15, and the height may be within 10 mm. In addition, each of the electromagnetic wave shielding filters 610 to 652 may have any shape as long as it has inductance.

[0071] Fig. 6A An example is shown including a first electromagnetic wave shield filter 610 and a second electromagnetic wave shield filter 611. In this example, the first electromagnetic wave shield filter 610 and the second electromagnetic wave shield filter 611 may have the same structure.

[0072] like Fig. 6AAs shown, the first electromagnetic wave shielding filter 610 may be located on the third transmitting coil 17, overlapping the first transmitting coil 15. The second electromagnetic wave shielding filter 611 may be located on the third transmitting coil 17, overlapping the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 610 and the center point of the second electromagnetic wave shielding filter 611 may be located on the third transmitting coil 17.

[0073] Figure 6B An example is shown including the first electromagnetic wave shield filter 612, the second electromagnetic wave shield filter 613, and the third electromagnetic wave shield filter 614. In this example, the first electromagnetic wave shield filter 612, the second electromagnetic wave shield filter 613, and the third electromagnetic wave shield filter 614 may have the same structure.

[0074] like Figure 6B As shown, the first electromagnetic wave shielding filter 612 may be located at the upper end of the first transmitting coil 15, the second electromagnetic wave shielding filter 613 may be located on the third transmitting coil 17, and the third electromagnetic wave shielding filter 614 may be located at the lower end of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 612 may not be located on the first transmitting coil 15. The center point of the second electromagnetic wave shielding filter 613 may not be located on the third transmitting coil 17. The center point of the third electromagnetic wave shielding filter 614 may not be located on the second transmitting coil 16.

[0075] Figure 6C An example is shown including a first electromagnetic wave shield filter 615, a second electromagnetic wave shield filter 616, and a third electromagnetic wave shield filter 617. In this example, the first electromagnetic wave shield filter 615, the second electromagnetic wave shield filter 616, and the third electromagnetic wave shield filter 617 may have the same structure.

[0076] like Figure 6C As shown, the first electromagnetic wave shielding filter 615 may be located on the third transmitting coil 17, overlapping with the first transmitting coil 15. The second electromagnetic wave shielding filter 616 may be located on the third transmitting coil 17, overlapping with the third transmitting coil 17. The third electromagnetic wave shielding filter 617 may be located on the third transmitting coil 17, overlapping with the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 615 may not be located on the first transmitting coil 15. The center point of the second electromagnetic wave shielding filter 616 may not be located on the third transmitting coil 17. The center point of the third electromagnetic wave shielding filter 617 may not be located on the second transmitting coil 16. In addition, the first electromagnetic wave shielding filter 615 and the third electromagnetic wave shielding filter 617 may be located on the same layer. The second electromagnetic wave shielding filter 616 may be located on a higher layer than the first electromagnetic wave shielding filter 615.

[0077] Fig.6D An example is shown including a first electromagnetic wave shielding filter 618, a second electromagnetic wave shielding filter 619, a third electromagnetic wave shielding filter 620, and a fourth electromagnetic wave shielding filter 621. In this example, the first electromagnetic wave shielding filter 618, the second electromagnetic wave shielding filter 619, the third electromagnetic wave shielding filter 620, and the fourth electromagnetic wave shielding filter 621 may have the same structure.

[0078] like Fig.6D As shown, the first electromagnetic wave shielding filter 618 may be located on the left side of the first transmitting coil 15, and the second electromagnetic wave shielding filter 619 may be located on the right side of the first transmitting coil 15. The third electromagnetic wave shielding filter 620 may be located on the left side of the second transmitting coil 16, and the fourth electromagnetic wave shielding filter 621 may be located on the right side of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 618 and the center point of the second electromagnetic wave shielding filter 619 may be located on the first transmitting coil 15. The center point of the third electromagnetic wave shielding filter 620 and the center point of the fourth electromagnetic wave shielding filter 621 may be located on the second transmitting coil 16.

[0079] Fig. 6E An example is shown including a first electromagnetic wave shielding filter 622, a second electromagnetic wave shielding filter 623, a third electromagnetic wave shielding filter 624, a fourth electromagnetic wave shielding filter 625, and a fifth electromagnetic wave shielding filter 626. In this example, the first electromagnetic wave shielding filter 622, the second electromagnetic wave shielding filter 623, the fourth electromagnetic wave shielding filter 625, and the fifth electromagnetic wave shielding filter 626 may have the same structure.

[0080] like Fig. 6E As shown, the first electromagnetic wave shielding filter 622 may be located on the left side of the first transmitting coil 15, and the second electromagnetic wave shielding filter 623 may be located on the right side of the first transmitting coil 15. The third electromagnetic wave shielding filter 624 may overlap with the third transmitting coil 17. The fourth electromagnetic wave shielding filter 625 may be located on the left side of the second transmitting coil 16, and the fifth electromagnetic wave shielding filter 626 may be located on the right side of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 622 and the center point of the second electromagnetic wave shielding filter 623 may be located on the first transmitting coil 15. The center point of the third electromagnetic wave shielding filter 624 may not be located on the first transmitting coil 15 and the second transmitting coil 16. The center point of the fourth electromagnetic wave shielding filter 625 and the center point of the fifth electromagnetic wave shielding filter 626 may be located on the second transmitting coil 16.

[0081] Fig. 6FAn example is shown including a first electromagnetic wave shielding filter 627, a second electromagnetic wave shielding filter 628, a third electromagnetic wave shielding filter 629, a fourth electromagnetic wave shielding filter 630, a fifth electromagnetic wave shielding filter 631, and a sixth electromagnetic wave shielding filter 632. In this example, the first electromagnetic wave shielding filter 627, the second electromagnetic wave shielding filter 628, the third electromagnetic wave shielding filter 629, the fourth electromagnetic wave shielding filter 630, the fifth electromagnetic wave shielding filter 631, and the sixth electromagnetic wave shielding filter 632 may have the same structure.

[0082] like Fig. 6F As shown, the first electromagnetic wave shielding filter 627 may be located on the left side of the first transmitting coil 15, and the second electromagnetic wave shielding filter 628 may be located on the right side of the first transmitting coil 15. The third electromagnetic wave shielding filter 629 may be located on the left side of the third transmitting coil 17, and the fourth electromagnetic wave shielding filter 630 may be located on the right side of the third transmitting coil 17. The fifth electromagnetic wave shielding filter 631 may be located on the left side of the second transmitting coil 16, and the sixth electromagnetic wave shielding filter 632 may be located on the right side of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 627 and the center point of the second electromagnetic wave shielding filter 628 may be located on the first transmitting coil 15. The center point of the third electromagnetic wave shielding filter 629 and the center point of the fourth electromagnetic wave shielding filter 630 may be located on the third transmitting coil 17. The center point of the fifth electromagnetic wave shielding filter 631 and the center point of the sixth electromagnetic wave shielding filter 632 may be located on the second transmitting coil 16.

[0083] Figure 6G An example including a first electromagnetic wave shielding filter 633, a second electromagnetic wave shielding filter 634, a third electromagnetic wave shielding filter 635, a fourth electromagnetic wave shielding filter 636, a fifth electromagnetic wave shielding filter 637, and a sixth electromagnetic wave shielding filter 638 is shown. In this example, the first electromagnetic wave shielding filter 633, the second electromagnetic wave shielding filter 634, the fifth electromagnetic wave shielding filter 637, and the sixth electromagnetic wave shielding filter 638 may have the same structure. The third electromagnetic wave shielding filter 635 and the fourth electromagnetic wave shielding filter 636 may have the same structure.

[0084] like Figure 6GAs shown, the first electromagnetic wave shielding filter 633 may be located on the upper left side of the first transmitting coil 15, and the second electromagnetic wave shielding filter 634 may be located on the upper right side of the first transmitting coil 15. The third electromagnetic wave shielding filter 635 may be located at the upper end of the third transmitting coil 17, and the fourth electromagnetic wave shielding filter 636 may be located at the lower end of the third transmitting coil 17. The fifth electromagnetic wave shielding filter 637 may be located on the lower left side of the second transmitting coil 16, and the sixth electromagnetic wave shielding filter 638 may be located on the lower right side of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 633, the center point of the second electromagnetic wave shielding filter 634, and the center point of the third electromagnetic wave shielding filter 635 may be located on the first transmitting coil 15. The center point of the fourth electromagnetic wave shielding filter 636, the center point of the fifth electromagnetic wave shielding filter 637, and the center point of the sixth electromagnetic wave shielding filter 638 may be located on the second transmitting coil 16.

[0085] Figure 6H An example including a first electromagnetic wave shielding filter 639, a second electromagnetic wave shielding filter 640, a third electromagnetic wave shielding filter 641, a fourth electromagnetic wave shielding filter 642, a fifth electromagnetic wave shielding filter 643, and a sixth electromagnetic wave shielding filter 644 is shown. In this example, the first electromagnetic wave shielding filter 639 and the sixth electromagnetic wave shielding filter 644 may have the same structure. The second electromagnetic wave shielding filter 640, the third electromagnetic wave shielding filter 641, the fourth electromagnetic wave shielding filter 642, and the fifth electromagnetic wave shielding filter 643 may have the same structure.

[0086] like Figure 6H As shown, the first electromagnetic wave shielding filter 639 may be located at the upper end on the first transmitting coil 15. The second electromagnetic wave shielding filter 640 may be located at the upper left side on the third transmitting coil 17, and the third electromagnetic wave shielding filter 641 may be located at the upper right side on the third transmitting coil 17. The fourth electromagnetic wave shielding filter 642 may be located at the lower left side on the third transmitting coil 17, and the fifth electromagnetic wave shielding filter 643 may be located at the lower left side on the third transmitting coil 17. The sixth electromagnetic wave shielding filter 644 may be located at the lower end on the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 639 may be located on the first transmitting coil 15, and the center point of the second electromagnetic wave shielding filter 640, the center point of the third electromagnetic wave shielding filter 641, the center point of the fourth electromagnetic wave shielding filter 642, and the center point of the fifth electromagnetic wave shielding filter 643 may be located on the third transmitting coil 17. The center point of the sixth electromagnetic wave shielding filter 644 may be located on the second transmitting coil 16.

[0087] Fig.6IAn example is shown including a first electromagnetic wave shielding filter 645, a second electromagnetic wave shielding filter 646, a third electromagnetic wave shielding filter 647, a fourth electromagnetic wave shielding filter 648, a fifth electromagnetic wave shielding filter 649, a sixth electromagnetic wave shielding filter 650, a seventh electromagnetic wave shielding filter 651, and an eighth electromagnetic wave shielding filter 652. In this example, the first electromagnetic wave shielding filter 645, the second electromagnetic wave shielding filter 646, the third electromagnetic wave shielding filter 647, the fourth electromagnetic wave shielding filter 648, the fifth electromagnetic wave shielding filter 649, the sixth electromagnetic wave shielding filter 650, the seventh electromagnetic wave shielding filter 651, and the eighth electromagnetic wave shielding filter 652 may have the same structure.

[0088] like Fig.6I As shown, the first electromagnetic wave shielding filter 645 may be located on the upper left side of the first transmitting coil 15, and the second electromagnetic wave shielding filter 646 may be located on the upper right side of the first transmitting coil 15. The third electromagnetic wave shielding filter 647 may be located on the upper left side of the third transmitting coil 17, and the fourth electromagnetic wave shielding filter 648 may be located on the upper right side of the third transmitting coil 17. The fifth electromagnetic wave shielding filter 649 may be located on the lower left side of the third transmitting coil 17, and the sixth electromagnetic wave shielding filter 650 may be located on the lower right side of the third transmitting coil 17. The seventh electromagnetic wave shielding filter 651 may be located on the lower left side of the second transmitting coil 16, and the eighth electromagnetic wave shielding filter 652 may be located on the lower right side of the second transmitting coil 16. In this example, the center point of the first electromagnetic wave shielding filter 645 and the center point of the second electromagnetic wave shielding filter 646 may be located on the first transmitting coil 15. The center points of the third electromagnetic wave shielding filter 647, the fourth electromagnetic wave shielding filter 648, the fifth electromagnetic wave shielding filter 649, and the sixth electromagnetic wave shielding filter 650 may be located on the third transmitting coil 17. The center points of the seventh electromagnetic wave shielding filter 651 and the eighth electromagnetic wave shielding filter 652 may be located on the second transmitting coil 16.

[0089] As described above, by installing at least two electromagnetic wave shielding filters at specific positions on the transmitting coil, the electromagnetic waves generated in the transmitting coil of the wireless charger can be effectively shielded.

[0090] In addition, by effectively shielding the electromagnetic waves generated in the transmitting coil of the wireless charger, the charging efficiency of the wireless charger can be improved.

[0091] Furthermore, by installing at least two electromagnetic wave shielding filters at specific locations on the transmitting coil, radio frequency interference (RFI) in an amplitude modulation (AM) band can be reduced.

[0092] Although the present disclosure has been described above with reference to the embodiments and the accompanying drawings, the present disclosure is not limited thereto but may be variously modified and changed by those skilled in the art without departing from the spirit and scope of the present disclosure as claimed in the claims.

Claims

1. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter and a second electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter and the second electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the transmitting coil, and The second electromagnetic wave shielding filter is located on the right side of the transmitting coil.

2. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter and a second electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter and the second electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located at the upper end of the transmitting coil, and The second electromagnetic wave shielding filter is located at the lower end of the transmitting coil.

3. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter and a third electromagnetic wave shielding filter are included, the second electromagnetic wave shielding filter and the third electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the transmitting coil, and The third electromagnetic wave shielding filter is located on the lower right side of the transmitting coil.

4. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter and a third electromagnetic wave shielding filter are included, the second electromagnetic wave shielding filter and the third electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located at the upper end of the transmitting coil. The second electromagnetic wave shielding filter is located on the lower left side of the transmitting coil, and The third electromagnetic wave shielding filter is located on the lower right side of the transmitting coil.

5. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter and a fourth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the transmitting coil. The third electromagnetic wave shielding filter is located on the lower left side of the transmitting coil, and The fourth electromagnetic wave shielding filter is located on the lower right side of the transmitting coil.

6. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil comprises a single transmitting coil, When the center point of each electromagnetic wave shielding filter is the foot of the vertical, the vertical line passing through the center point intersects the transmitting coil perpendicularly. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter and a fourth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located at the upper end of the transmitting coil. The second electromagnetic wave shielding filter is located on the left side of the transmitting coil. The third electromagnetic wave shielding filter is located on the right side of the transmitting coil, and The fourth electromagnetic wave shielding filter is located at the lower end of the transmitting coil.

7. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, and a third electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, and the third electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located at the upper end of the first transmitting coil. The second electromagnetic wave shielding filter is located on the first transmitting coil and the second transmitting coil. The third electromagnetic wave shielding filter is located at the lower end of the second transmitting coil, The center point of the first electromagnetic wave shielding filter is located on the first transmitting coil. The center point of the second electromagnetic wave shielding filter is located on the first transmitting coil or the second transmitting coil, and The center point of the third electromagnetic wave shielding filter is located on the second transmitting coil.

8. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter and a fourth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the right side of the first transmitting coil, The third electromagnetic wave shielding filter is located on the left side of the second transmitting coil. The fourth electromagnetic wave shielding filter is located on the right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, and A center point of the third electromagnetic wave shielding filter and a center point of the fourth electromagnetic wave shielding filter are located on the second transmitting coil.

9. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter and a fifth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter and the fifth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located on the first transmitting coil and the second transmitting coil. The fourth electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The fifth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil. The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, The center point of the third electromagnetic wave shielding filter is located on the first transmitting coil or the second transmitting coil, and A center point of the fourth electromagnetic wave shielding filter and a center point of the fifth electromagnetic wave shielding filter are located on the second transmitting coil.

10. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter and a sixth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter and the sixth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located on the left side of the first transmitting coil and the second transmitting coil. The fourth electromagnetic wave shielding filter is located on the right side of the first transmitting coil and the second transmitting coil. The fifth electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The sixth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, A center point of the fifth electromagnetic wave shielding filter and a center point of the sixth electromagnetic wave shielding filter are located on the second transmitting coil.

11. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter and a sixth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter and the sixth electromagnetic wave shielding filter have the same structure, and the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located at the lower end of the first transmitting coil, The fourth electromagnetic wave shielding filter is located at the upper end of the second transmitting coil, The fifth electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The sixth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter, the center point of the second electromagnetic wave shielding filter, and the center point of the third electromagnetic wave shielding filter are located on the first transmitting coil, and A center point of the fourth electromagnetic wave shielding filter, a center point of the fifth electromagnetic wave shielding filter, and a center point of the sixth electromagnetic wave shielding filter are located on the second transmitting coil.

12. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil and a second transmitting coil. When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter, a sixth electromagnetic wave shielding filter, a seventh electromagnetic wave shielding filter and an eighth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter, the sixth electromagnetic wave shielding filter, the seventh electromagnetic wave shielding filter and the eighth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located on the lower left side of the first transmitting coil, The fourth electromagnetic wave shielding filter is located at the lower right side of the first transmitting coil, The fifth electromagnetic wave shielding filter is located on the upper left side of the second transmitting coil, The sixth electromagnetic wave shielding filter is located on the upper right side of the second transmitting coil, The seventh electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The eighth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter, the center point of the second electromagnetic wave shielding filter, the center point of the third electromagnetic wave shielding filter, and the center point of the fourth electromagnetic wave shielding filter are located on the first transmitting coil, and A center point of the fifth electromagnetic wave shielding filter, a center point of the sixth electromagnetic wave shielding filter, a center point of the seventh electromagnetic wave shielding filter, and a center point of the eighth electromagnetic wave shielding filter are located on the second transmitting coil.

13. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, and a third electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, and the third electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter overlaps with the first transmitting coil, The second electromagnetic wave shielding filter overlaps with the third transmitting coil, The third electromagnetic wave shielding filter overlaps with the second transmitting coil, The first electromagnetic wave shielding filter and the third electromagnetic wave shielding filter are located on the same layer, and The second electromagnetic wave shield filter is located on a higher layer than the first electromagnetic wave shield filter.

14. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter and a fourth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the right side of the first transmitting coil, The third electromagnetic wave shielding filter is located on the left side of the second transmitting coil. The fourth electromagnetic wave shielding filter is located on the right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, A center point of the third electromagnetic wave shielding filter and a center point of the fourth electromagnetic wave shielding filter are located on the second transmitting coil.

15. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter and a fifth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter and the fifth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the right side of the first transmitting coil, The third electromagnetic wave shielding filter overlaps with the third transmitting coil, The fourth electromagnetic wave shielding filter is located on the left side of the second transmitting coil, The fifth electromagnetic wave shielding filter is located on the right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, and A center point of the fourth electromagnetic wave shielding filter and a center point of the fifth electromagnetic wave shielding filter are located on the second transmitting coil.

16. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter and a sixth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter and the sixth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the right side of the first transmitting coil, The third electromagnetic wave shielding filter is located on the left side of the third transmitting coil. The fourth electromagnetic wave shielding filter is located on the right side of the third transmitting coil, The fifth electromagnetic wave shielding filter is located on the left side of the second transmitting coil. The sixth electromagnetic wave shielding filter is located on the right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, The center point of the third electromagnetic wave shielding filter and the center point of the fourth electromagnetic wave shielding filter are located on the third transmitting coil, and A center point of the fifth electromagnetic wave shielding filter and a center point of the sixth electromagnetic wave shielding filter are located on the second transmitting coil.

17. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter and a sixth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter and the sixth electromagnetic wave shielding filter have the same structure, and the third electromagnetic wave shielding filter and the fourth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located at the upper end of the third transmitting coil. The fourth electromagnetic wave shielding filter is located at the lower end of the third transmitting coil, The fifth electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The sixth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter, the center point of the second electromagnetic wave shielding filter, and the center point of the third electromagnetic wave shielding filter are located on the first transmitting coil, and A center point of the fourth electromagnetic wave shielding filter, a center point of the fifth electromagnetic wave shielding filter, and a center point of the sixth electromagnetic wave shielding filter are located on the second transmitting coil.

18. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter and a sixth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter and the sixth electromagnetic wave shielding filter have the same structure, and the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter and the fifth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located at the upper end of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper left side of the third transmitting coil, The third electromagnetic wave shielding filter is located on the upper right side of the third transmitting coil. The fourth electromagnetic wave shielding filter is located on the lower left side of the third transmitting coil, The fifth electromagnetic wave shielding filter is located on the lower right side of the third transmitting coil. The sixth electromagnetic wave shielding filter is located at the lower end of the second transmitting coil, The center point of the first electromagnetic wave shielding filter is located on the first transmitting coil. The center point of the second electromagnetic wave shielding filter, the center point of the third electromagnetic wave shielding filter, the center point of the fourth electromagnetic wave shielding filter, and the center point of the fifth electromagnetic wave shielding filter are located on the third transmitting coil, and The center point of the sixth electromagnetic wave shielding filter is located on the second transmitting coil.

19. A wireless charger with electromagnetic shielding function, comprising: The transmitting coil generates a magnetic field through a high-frequency signal; as well as at least two electromagnetic wave shielding filters, located on the transmitting coil and shielding the electromagnetic waves generated in the transmitting coil, in: The transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil, The first transmitting coil and the second transmitting coil are located on the same layer, and The third transmitting coil is located on a higher layer than the first transmitting coil, When a first electromagnetic wave shielding filter, a second electromagnetic wave shielding filter, a third electromagnetic wave shielding filter, a fourth electromagnetic wave shielding filter, a fifth electromagnetic wave shielding filter, a sixth electromagnetic wave shielding filter, a seventh electromagnetic wave shielding filter and an eighth electromagnetic wave shielding filter are included, the first electromagnetic wave shielding filter, the second electromagnetic wave shielding filter, the third electromagnetic wave shielding filter, the fourth electromagnetic wave shielding filter, the fifth electromagnetic wave shielding filter, the sixth electromagnetic wave shielding filter, the seventh electromagnetic wave shielding filter and the eighth electromagnetic wave shielding filter have the same structure, The first electromagnetic wave shielding filter is located on the upper left side of the first transmitting coil. The second electromagnetic wave shielding filter is located on the upper right side of the first transmitting coil. The third electromagnetic wave shielding filter is located on the upper left side of the third transmitting coil. The fourth electromagnetic wave shielding filter is located on the upper right side of the third transmitting coil. The fifth electromagnetic wave shielding filter is located on the lower left side of the third transmitting coil, The sixth electromagnetic wave shielding filter is located on the lower right side of the third transmitting coil, The seventh electromagnetic wave shielding filter is located on the lower left side of the second transmitting coil, The eighth electromagnetic wave shielding filter is located on the lower right side of the second transmitting coil, The center point of the first electromagnetic wave shielding filter and the center point of the second electromagnetic wave shielding filter are located on the first transmitting coil, The center point of the third electromagnetic wave shielding filter, the center point of the fourth electromagnetic wave shielding filter, the center point of the fifth electromagnetic wave shielding filter, and the center point of the sixth electromagnetic wave shielding filter are located on the third transmitting coil, and A center point of the seventh electromagnetic wave shielding filter and a center point of the eighth electromagnetic wave shielding filter are located on the second transmitting coil.

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