TWM501684U - Wireless charging and near field communication double coil printed circuit board structure - Google Patents

Abstract

A wireless charging coil (A4WP) and near field communication (NFC) dual coils PCB structure comprising at least one A4WP coil wire is spirally shaped disposed on a printed circuit board (PCB), and a NFC coil wire is spirally disposed on a PCB. Wherein at least a portion of the A4WP coil spirally wire is located between two adjacent spirally wires of interval of the NFC coil. Therefore, in the present invention makes use of spaces of A4WP coil is corresponded A4WP or other relevant standards to combine with the NFC coil, so that the dual coil of the present invention can reduce the area of the PCB occupied by the electronic device.

Description

Wireless charging and near field communication double coil printed circuit board structure

This creation is a printed circuit board type double coil structure, especially for a printed circuit board type double wire combined with A4WP-compliant Wireless Charging (WLC) coil and Near Field Communication (NFC) coil. Circle structure.

Press, in portable electronic devices, such as mobile phones, PDAs (personal digital assistants), palmtop computers, notebook computers or tablets, etc., all use battery power, so that users can enjoy the state without power It is used, and these electronic devices are equipped with a wired power supply for battery charging or utility power supply.

The Wireless Charging (WLC) A4WP technology allows portable devices to use no power lines, but can directly transmit power to the portable devices to charge the battery by means of electromagnetic induction. As shown in FIG. 1 , it is a schematic diagram of a wireless charging transmission, including a power transmission module 10 and a power receiving module 20 . The power transmission sensing module 10 has a transmitting end coil 11 and a transmitting end core plate. 12, the power receiving sensing module 20 also has a receiving end coil 21 and a receiving end core plate 22. When the power receiving module 20 is close to the power When the module 10 is transmitted, the current flows through the transmitting end coil 11 of the power transmitting sensing module 10 to generate a magnetic field, so that the receiving end coil 21 of the power receiving sensing module 20 senses the magnetic field to generate a current.

In addition, the combination of Near Field Communication (NFC) in portable electronic devices is also receiving considerable attention. Near Field Communication (NFC) enables portable devices to perform contactless point-to-point communication, providing extremely convenient connection methods. Communicate quickly and easily.

Near Field Communication (NFC) technology evolved from the integration of contactless radio frequency identification (RFID) and interconnect technology. In the current field of near field communication (NFC) applications, there are proximity cards used in the MRT system. As long as the proximity card is close to the MRT ticket gate, it can be quickly cleared, and the induction time is faster than the general non-contact wafer card, which is quite useful for high-input traffic stations. Therefore, some manufacturers propose to embed the near field communication chip in portable electronic devices such as mobile phones. Therefore, the integration of wireless charging (WLC) A4WP and Near Field Communication (NFC) functions in portable electronic devices will be an inevitable trend in the future.

As shown in FIG. 2, a schematic diagram of a conventional wireless charging coil and a near field communication coil sharing a circuit board. In the circuit board 30 of FIG. 2, a near field communication coil (NFC) 31 and a wireless charging coil (WLC) 32 are shown. The two different frequency signals are used. The near field communication coil 31 is short, which is a two-way communication transmission frequency, and the wireless charging coil 32 is long, which is a one-way power transmission frequency. In addition, in order to enable wireless charging devices to support electronic products for wireless charging, there are currently three standards for wireless charging technology (Standard), such as A4WP. (Alliance for Wireless Power), PMA (Power Matters Alliance) and WPC (Wireless Power Consortium) three standard alliances to establish a standard format, the establishment of wireless charging technology standardization allows alliance members or manufacturers of products to support their wireless charging devices. This allows wireless charging technology to become popular quickly. However, on a standardized induction coil circuit board, if a near field communication (NFC) coil is added, it is necessary to increase the circuit board of the sense coil, which causes a lot of space waste, as shown in FIG. On the shrinking (light and thin) handheld electronic devices, it is undoubtedly worse. Therefore, the creator of this case designed a wireless circuit board (WLC) A4WP and near field communication (NFC) dual-use printed circuit board type induction coil, which can combine near field communication (NFC) coils and wireless charging (WLC) coils in accordance with standardization. Among the areas.

The purpose of this creation is to provide a wireless charging and near field communication dual-purpose coil printed circuit board structure, which can utilize a space of a wireless charging coil printed circuit board conforming to A4WP or other related standards, and a near field communication coil to make a dual-purpose coil. Printed circuit boards can shrink the area occupied by electronic devices.

The main technical feature of the present invention is to provide a wireless charging and near field communication double coil printed circuit board structure, comprising: at least one wireless charging coil, the wires are spirally arranged on at least one surface of a printed circuit board; At least one near field communication coil having a wire spirally arranged on the surface of the printed circuit board, wherein at least a portion of the helical wire of the wireless charging coil is located at an interval of two adjacent spiral wires of the near field communication coil between.

The second technical feature of the present invention is to provide the above-mentioned wireless charging and near field communication double coil printed circuit board structure, wherein the spiral conductor of the wireless charging coil and the helical conductor of the near field communication coil are 1:1 interdigitated. The spacing is configured, and the wire width of the wireless charging coil is greater than the wire width of the near field communication coil.

A further technical feature of the present invention is to provide the above-mentioned wireless charging and near field communication double coil printed circuit board structure, wherein the spiral conductor of the wireless charging coil and the helical conductor of the near field communication coil are interlaced by M:1. The spacing configuration, where M is a complex number of 2 or more, and the wire width of the wireless charging coil is equal or similar to the wire width of the near field communication coil.

10‧‧‧Power transmission module

11‧‧‧Transmission end coil

12‧‧‧Transport end core plate

20‧‧‧Power receiving module

21‧‧‧ receiving coil

22‧‧‧ receiving end core plate

30‧‧‧ boards

31‧‧‧ Near Field Communication Coil

32‧‧‧Wireless charging coil

40‧‧‧Printed circuit board

41‧‧‧Wireless charging coil

42‧‧‧ Near Field Communication Coil

50‧‧‧core board

60‧‧‧Printed circuit board

61‧‧‧Wireless charging coil

62‧‧‧ Near Field Communication Coil

63‧‧‧Connecting end

64‧‧‧ Connection point

1 is a schematic diagram of a conventional wireless charging transmission; FIG. 2 is a schematic diagram of a conventional wireless charging coil and a near field communication coil sharing circuit board; FIG. 3 is a dual-purpose coil printed circuit board for creating a wireless charging and near field communication; 4 is a side view of the AA section of FIG. 3; FIG. 5 is a schematic view showing another embodiment of the wireless charging and near field communication dual-purpose coil printed circuit board; and FIG. 6 is a side view of the BB section of FIG.

In order to enable your review board to further understand the techniques, means and effects of this creation in order to achieve the intended purpose, please refer to the following detailed description and drawings of this creation, and believe that the purpose, characteristics and characteristics of this creation can be An in-depth and specific understanding is provided, however, the drawings are provided for reference and description only and are not intended to limit the invention.

First, please refer to the embodiment of FIG. 3 and FIG. 4 . FIG. 3 is a schematic diagram of an embodiment of a dual-purpose coil printed circuit board for wireless charging and near field communication, and FIG. 4 is a side view of the AA cross section of FIG. 3 . In this embodiment, a printed circuit board 40 is included. The printed circuit board 40 can be a single panel. At least one wireless charging coil (WLC) 41 conforming to the A4WP standard and at least one are distributed on a surface of the printed circuit board 40. A near field communication coil (NFC) 42 is disposed on a core board 50 to make the printed circuit board 40 an A4WP wirelessly charged transmission sensor board.

The wires of the wireless charging coil 41 are spirally distributed on a surface of the printed circuit board 40, and the wires of the near field communication coil 42 are also spirally distributed on a surface of the printed circuit board 40. The wireless charging coil and the near field communication coil can be etched, coated or plated on a single-sided printed circuit board. The difference between this creation and the prior art is that a helical conductor of at least a portion of the wireless charging coil 41 is located between the intervals of two adjacent helical conductors of the near field communication coil 42. By making the wireless charging coil 41 of the present invention conform to the A4WP or other related standards, the near field communication coil 42 is configured by the space of the printed circuit board, and the printed circuit can be saved as much as possible. Board space.

As shown in FIG. 3 and FIG. 4 of the embodiment, the helical conductors of the wireless charging coil 41 and the helical conductors of the near field communication coil 42 are 1:1 interlaced, in other words, in this embodiment, There is a wire of the wireless charging coil 41 between the intervals of every two adjacent wires of the near field communication coil 42, and similarly, there exists a near field between the intervals of the wires of each of the two adjacent wireless charging coils 41. The wire of the communication coil 42. In the present embodiment, the width of the spiral wire of the wireless charging coil 41 is greater than the width of the spiral wire of the near field communication coil 42, so that the wireless charging coil 41 can flow through a large transmission current.

Please refer to the embodiment of FIG. 5 and FIG. 6 . FIG. 5 is a schematic diagram of another embodiment of the dual-purpose coil printed circuit board for wireless charging and near field communication, and FIG. 6 is a side view of the BB section of FIG. 5 . schematic diagram. In this embodiment, a printed circuit board 60 is included, which may be a double-panel or multi-layer board, and the material thereof includes a paper phenol copper substrate, a paper epoxy resin (Epoxy) copper substrate, a Glass-Epoxy copper substrate, and a Glass. A composite copper substrate, a benzene resin copper substrate, or a flexible copper substrate of a polymer or a polyester material.

At least one wireless charging coil 61 and at least one near field communication coil 62 are distributed on one surface or both sides or any intermediate layer of the printed circuit board 60, wherein the wires of the wireless charging coil 61 and the near field communication coil 62 are spiral The shape may be a circular, rectangular or polygonal spiral, and the embodiment is a rectangular spiral and may be etched, coated or plated on the printed circuit. Double or multi-layer boards on the board. The wireless charging coil 61 has a portion of the plurality of helical wires between the intervals of the adjacent two helical wires of the near field communication coil 62, and the wireless charging coil 61 and the near field communication coil 62 are M:1 ( The manner in which M is a complex number of 2 or more is alternately arranged. As shown in this embodiment, the ratio of the wireless charging coil 61 to the near field communication coil 62 is 3:1, in other words, every two phases are adjacent to the field communication coil 62. There are three wires of the wireless charging coil 61 between the wire gaps.

In the present embodiment, the spiral conductors of the wireless charging coil 61 have the same width or approximately the width of the helical conductor of the near field communication coil 62. And the wireless charging coil 61 and the near field communication coil 62 can span staggered wires via different layers of the printed circuit board 60. In addition, in the embodiment, one side edge of the printed circuit board 60 is further provided with at least one connecting end portion 63, and a plurality of connecting points 64 are disposed thereon, and two terminals of the spiral conductor of the wireless charging coil 61 can be respectively connected. And/or connecting two terminals of the near field communication 62 helical wire, and the two terminal wires of the wireless charging coil 61 may extend to the connection point 64 of the connection end 63 via the other surface or intermediate layer of the printed circuit board 60, The two terminal wires of the near field communication coil 62 may also extend through the other surface or intermediate layer of the printed circuit board 60 to the connection point 64 of the connection end 63 to span the staggered wires.

In summary, the present invention provides a printed circuit board structure for a wireless charging and near field communication dual-purpose coil, which can be saved as much as possible by combining a near field communication coil in the case where the wireless charging coil conforms to A4WP or other related standards. The use of printed circuit boards, so this creation is quite different from the well-known The design can improve the overall use value, and it has not been seen in the publication or public use before the application. Cheng has already met the requirements of the new patent, and has filed a new patent application according to law. However, the above-mentioned drawings and descriptions are only examples of the present invention, and those skilled in the art may make other improvements according to the above description, and these changes are still defined by the following definitions. In the scope of patents.

40‧‧‧Printed circuit board

41‧‧‧Wireless charging coil

42‧‧‧ Near Field Communication Coil

50‧‧‧core board

Claims (11)

A wireless charging and near field communication double coil printed circuit board structure, comprising at least: a wireless charging coil having a wire spirally arranged on at least one surface of a printed circuit board; and at least one near field communication coil A wire is helically arranged on the surface of the printed circuit board, wherein at least a portion of the helical wire of the wireless charging coil is between the spacing of two adjacent helical wires of the near field communication coil. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the spiral wire of the wireless charging coil and the spiral wire of the near field communication coil are 1:1. Arranged at intervals. The wireless charging and near field communication only coil printed circuit board structure according to claim 2, wherein the width of the spiral wire of the wireless charging coil is greater than the width of the spiral wire of the near field communication coil. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the spiral wire of the wireless charging coil and the spiral wire of the near field communication coil are M:1 Interlaced with each other, where M is a complex number of 2 or more. The wireless charging and near field communication only coil printed circuit board structure according to claim 4, wherein the spiral wire of the wireless charging coil and the spiral wire of the near field communication coil have the same or similar width. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the printed circuit board is a single panel, a double panel or a multilayer board. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the printed circuit board is disposed on a core board. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the wireless charging coil and the helical conductor of the near field communication coil are in a circular, rectangular or polygonal spiral shape. Arranged on the surface of the printed circuit board. The wireless charging and near field communication only coil printed circuit board structure according to claim 1, wherein the method further comprises at least one connecting end portion, wherein a plurality of connecting points are respectively disposed, and the spiral wires of the wireless charging coil are respectively connected The two terminals, and/or the two terminals of the spiral wire of the near field communication coil. The wireless charging and near field communication only coil printed circuit board structure according to claim 9 , wherein one of the ends of the spiral wire of the wireless charging coil is via another surface or the middle of the printed circuit board The layer extends to one of the junctions. The wireless charging and near field communication only coil printed circuit board structure according to claim 9 , wherein one of the ends of the spiral wire of the near field communication coil is via another surface of the printed circuit board or The intermediate layer extends to one of the connection points.