WO2024082821A1 - Dispositif électronique pliable - Google Patents

Dispositif électronique pliable Download PDF

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Publication number
WO2024082821A1
WO2024082821A1 PCT/CN2023/115048 CN2023115048W WO2024082821A1 WO 2024082821 A1 WO2024082821 A1 WO 2024082821A1 CN 2023115048 W CN2023115048 W CN 2023115048W WO 2024082821 A1 WO2024082821 A1 WO 2024082821A1
Authority
WO
WIPO (PCT)
Prior art keywords
nfc
antenna
electronic device
electrical connection
connection point
Prior art date
Application number
PCT/CN2023/115048
Other languages
English (en)
Chinese (zh)
Inventor
廖巧亮
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2024082821A1 publication Critical patent/WO2024082821A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith

Definitions

  • the present application relates to the field of communication technology, and in particular to a foldable electronic device.
  • foldable electronic devices such as foldable phones are gradually emerging.
  • foldable phones are different from previous candy-bar phones and flip phones, providing users with a better user experience.
  • Foldable phones can provide a larger screen experience when unfolded, and are compact and easy to carry when folded.
  • the NFC (Near Field Communication) antenna is usually designed on a pressure plate bracket, or the NFC antenna and wireless charging coil are designed as two-in-one.
  • the embodiment of the present application provides a foldable electronic device, which can increase the area of the NFC card swiping area of the electronic device and improve the convenience of using the NFC function of the electronic device.
  • an embodiment of the present application provides a foldable electronic device, including a first part and a second part, wherein the first part and the second part can be relatively rotated to a folded state or an unfolded state, and the electronic device further includes:
  • a first antenna, disposed on the first part, and the first antenna is used to transmit an NFC signal
  • a second antenna, disposed on the second part, and the second antenna is used to transmit an NFC signal
  • a direction of the NFC radiation field generated by the first antenna is the same as a direction of the NFC radiation field generated by the second antenna.
  • an embodiment of the present application provides a foldable electronic device, including a first part and a second part, wherein the first part and the second part can be relatively rotated to a folded state or an unfolded state, and the electronic device further includes:
  • a first antenna disposed at the first part, the first antenna being used to transmit an NFC signal, and forming a first NFC current when the first antenna transmits the NFC signal;
  • a second antenna disposed at the second part, the second antenna being used to transmit an NFC signal, and generating a second NFC current when the second antenna transmits the NFC signal;
  • a direction of a first NFC current in a portion of the first antenna close to the second antenna is opposite to a direction of a second NFC current in the second antenna.
  • FIG. 1 is a schematic diagram of a first structure of an electronic device in an unfolded state provided by an embodiment of the present application.
  • FIG. 2 is a schematic rear view of the electronic device shown in FIG. 1 .
  • FIG3 is a second structural schematic diagram of an electronic device in an unfolded state provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of the electronic device shown in FIG. 3 in a folded state.
  • FIG. 5 is a schematic rear view of the electronic device shown in FIG. 4 .
  • FIG6 is a third structural schematic diagram of the electronic device in an unfolded state provided by an embodiment of the present application.
  • FIG. 7 is a fourth structural schematic diagram of the electronic device in an unfolded state provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of the flow direction of NFC current in the electronic device shown in FIG. 7 .
  • FIG. 9 is a fifth structural schematic diagram of an electronic device in an unfolded state provided in an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the flow direction of NFC current in the electronic device shown in FIG. 9 .
  • FIG. 11 is a schematic diagram of the flow direction of NFC current when the electronic device provided by an embodiment of the present application is in a folded state.
  • FIG. 12 is a schematic diagram of an NFC radiation field when the electronic device provided in an embodiment of the present application is in a folded state.
  • FIG. 13 is a sixth structural schematic diagram of an electronic device in an unfolded state provided in an embodiment of the present application.
  • FIG. 14 is a schematic diagram showing the connection relationship among the first isolation circuit, the second isolation circuit and the first antenna in the electronic device shown in FIG. 13 .
  • FIG. 15 is a seventh structural schematic diagram of an electronic device in an unfolded state provided in an embodiment of the present application.
  • FIG. 16 is a schematic diagram showing the connection relationship among the third isolation circuit, the fourth isolation circuit and the second antenna in the electronic device shown in FIG. 15 .
  • FIG. 17 is a schematic diagram of the antenna circuit structure in the electronic device provided in an embodiment of the present application.
  • FIG. 18 is a schematic diagram of the NFC card swiping position when the electronic device 100 is in the view shown in FIG. 1 .
  • FIG19 is a schematic diagram of the NFC card swiping position when the electronic device 100 is in the view shown in FIG2 .
  • the embodiment of the present application provides a foldable electronic device.
  • the electronic device may include but is not limited to: a smart phone, a tablet computer, a router, an optical network terminal (ONT), a wireless access point (AP), a gaming device, an augmented reality (AR) device, a data storage device, an audio playback device, a video playback device, a laptop computer, a desktop computing device, etc.
  • ONT optical network terminal
  • AP wireless access point
  • AR augmented reality
  • the electronic device can be folded along the axis, and the specific folding method can be, for example, folding left and right, folding up and down, folding diagonally, or folding at any other angle, etc., which is not limited in this application.
  • the electronic device can switch between a folded state and an unfolded state.
  • the electronic device When in the unfolded state, the electronic device has a larger display area, which can provide users with a better user experience, such as watching movies on a large screen, reading novels on a large screen, and other good user experiences.
  • the electronic device When in the folded state, the electronic device can be compact and easy to carry.
  • Figure 1 is a first structural schematic diagram of an electronic device 100 in an unfolded state provided by an embodiment of the present application
  • Figure 2 is a rear view schematic diagram of the electronic device 100 shown in Figure 1.
  • the structural schematic diagram of the electronic device 100 may be a perspective schematic diagram, so as to facilitate the presentation of the internal structure of the electronic device 100 and the description of the internal structure, which will not be described in detail below.
  • the electronic device 100 includes a first part 10, a second part 20, a rotating shaft 30 and a display screen 40.
  • the first part 10 and the second part 20 form the two main parts of the electronic device 100.
  • the first part 10 may include, for example, a housing and components such as a mainboard disposed in the housing.
  • the second part 20 may include, for example, a housing and components such as a battery disposed in the housing.
  • the first part 10 and the second part 20 are located on both sides of the rotating shaft 30.
  • the rotating shaft 30 may form the axis of the electronic device 100.
  • the first part 10 is rotatably connected to the second part 20 via the rotating shaft 30 so that the first part 10 and the second part 20 can rotate relative to each other to a folded state or an unfolded state. As shown in FIGS. 1 and 2 , the first part 10 and the second part 20 can rotate in the direction indicated by the curved arrow.
  • the folded state of the electronic device 100 may include a state where the first portion 10 and the second portion 20 rotate to be parallel to each other, or may include a state where the angle between the first portion 10 and the second portion 20 is less than or equal to a preset angle. That is, when the first portion 10 and the second portion 20 are parallel to each other, or when the angle between the first portion 10 and the second portion 20 is less than or equal to a preset angle, it can be understood that the electronic device 100 is in the folded state.
  • the electronic device 100 being in the unfolded state may include the first portion 10 and the second portion 20 rotating to be in the same plane, and may also include a state where the angle between the first portion 10 and the second portion 20 is greater than a preset angle. That is, when the first portion 10 and the second portion 20 are in the same plane, or when the angle between the first portion 10 and the second portion 20 is greater than a preset angle, it can be understood that the electronic device 100 is in the unfolded state.
  • the preset angle may be 30 degrees. Then, when the first part 10 and the second part 20 are parallel to each other, or when the angle between the first part 10 and the second part 20 is less than or equal to 30 degrees, it can be understood that the electronic device 100 is in a folded state; when the first part 10 and the second part 20 are in the same plane, or when the angle between the first part 10 and the second part 20 is greater than 30 degrees, it can be understood that the electronic device 100 is in an unfolded state. It can be understood that the preset angle of 30 degrees is only an exemplary description, and the present application is not limited thereto.
  • the display screen 40 includes a first display unit 41 and a second display unit 42 connected to the first display unit 41.
  • the first display unit 41 is disposed on the first portion 10
  • the second display unit 42 is disposed on the second portion 20. Both the first display unit 41 and the second display unit 42 can be used to display content such as images, videos, texts, etc.
  • the electronic device 100 can control the first display unit 41 and the second display unit 42 to display content at the same time, or can control the first display unit 41 or the second display unit 42 to display content separately.
  • the display screen 40 is a flexible display screen, so that the display screen 40 can be bent or stretched as the electronic device 100 is folded or unfolded.
  • the first display portion 41 and the second display portion 42 form an integrated structure, and the structure of the display screen 40 is easy to implement and has good structural stability.
  • the display screen 40 may be a non-flexible display screen, wherein the first display portion 41 and the second display portion 42 may both be rigid structures, and the first display portion 41 and the second display portion 42 may be connected via a rotatable mechanical structure, so that the first display portion 41 and the second display portion 42 can rotate relative to each other as the electronic device 100 is folded or unfolded.
  • the electronic device 100 further includes a first antenna 11 and a second antenna 21.
  • the first antenna 11 is disposed on the first part 10, for example, it can be disposed on a mainboard support of the first part 10, it can also be disposed on an antenna support of the first part 10, it can also be disposed on a middle frame support of the first part 10, or it can also be disposed on a shell of the first part 10.
  • the second antenna 21 is disposed on the second part 20, for example, it can be disposed on an antenna support of the second part 20, it can also be disposed on a middle frame support of the second part 20, or it can also be disposed on a shell of the second part 20.
  • the first antenna 11 and the second antenna 21 may be radiators formed by FPC (Flexible Printed Circuit), LDS (Laser Direct Structuring), PDS (Printed Direct Structuring), etc., or may be radiators formed by metal structures such as metal frames.
  • the first antenna 11 and the second antenna 21 may be radiators of the same type or different types.
  • the first antenna 11 and the second antenna 21 can be used to transmit NFC (Near Field Communication) signals. It can be understood that when the first antenna 11 and the second antenna 21 transmit NFC signals, an NFC radiation field can be generated in the surroundings, and the NFC signal can be radiated to the outside world, thereby realizing the NFC communication function of the electronic device 100. For example, through the first antenna 11 and the second antenna 21, the electronic device 100 can realize NFC functions such as NFC subway card swiping and NFC access card swiping.
  • NFC Near Field Communication
  • the electronic device 100 further includes a camera module 12, which is disposed in the first portion 10.
  • the camera module 12 may be a rear camera module.
  • the first antenna 11 and the camera module 12 are spaced apart from each other.
  • the camera module 12 may include one or more cameras, for example, the camera module 12 may include three cameras as shown in FIG1 .
  • the electronic device 100 may further include a secondary display screen.
  • the secondary display screen may be disposed on the second portion 20, for example, the secondary display screen and the second display portion 42 of the display screen 40 are disposed on opposite sides of the second portion 20.
  • the secondary display screen may also be used to display content such as images, videos, texts, and the like.
  • Figure 3 is a second structural schematic diagram of the electronic device 100 provided in an embodiment of the present application in an unfolded state
  • Figure 4 is a structural schematic diagram of the electronic device 100 shown in Figure 3 in a folded state
  • Figure 5 is a rear view schematic diagram of the electronic device 100 shown in Figure 4.
  • the first antenna 11 is an NFC coil, for example, a ring coil formed of a metal material such as a wire, the number of turns of the coil can be one or more turns, and the NFC coil forms two free ends. In practical applications, the NFC coil can form an FPC structure.
  • the second antenna 21 can be formed on a metal frame.
  • the second part 20 of the electronic device 100 includes a metal frame 22.
  • the metal frame 22 can be, for example, a frame formed of materials such as aluminum alloy and magnesium alloy.
  • the metal frame 22 includes a metal branch 221, and the metal branch 221 can form the second antenna 21.
  • the metal branch 221 can be formed by opening a gap on the metal frame 22, for example, opening a gap 222 and a gap 223, and forming the metal branch 221 through the gap 222 and the gap 223.
  • the opening positions of the gaps 222 and 223 can be set according to actual needs, so that the length and position of the formed metal branch 221 meet the needs.
  • the electronic device 100 is described below with the first antenna 11 being an NFC coil and the second antenna 21 being an antenna formed by metal branches. It should be understood that in some other embodiments, the first antenna 11 and the second antenna 21 may also be antennas of other forms, which are not specifically limited in this application.
  • FIG. 6 is a third structural schematic diagram of the electronic device 100 in the unfolded state provided in an embodiment of the present application.
  • the electronic device 100 further includes a ferrite layer 13, which is disposed on the first part 10.
  • the ferrite layer 13 is stacked with the NFC coil 11.
  • the back cover of the electronic device 100 is a non-metal back cover, such as a plastic back cover
  • the non-metal back cover is located on one side of the NFC coil 11
  • the other side of the NFC coil 11 opposite to the non-metal back cover is the main board
  • the ferrite layer 13 can be disposed between the NFC coil 11 and the main board.
  • the ferrite layer 13 is formed of a ferrite material, and the ferrite material can be a nickel-copper-zinc material having a specified content of iron oxide, copper oxide, zinc oxide, and nickel oxide.
  • the ferrite material can also include some auxiliary materials, such as a specified content of bismuth oxide, silicon oxide, magnesium oxide, cobalt oxide and other materials.
  • auxiliary materials such as a specified content of bismuth oxide, silicon oxide, magnesium oxide, cobalt oxide and other materials.
  • the intensity of the NFC signal radiated to the outside world by the NFC coil 11 can be enhanced, thereby improving the card swiping distance and card swiping area range of the NFC function.
  • FIG. 7 is a fourth structural schematic diagram of the electronic device 100 in the unfolded state provided in an embodiment of the present application.
  • the electronic device 100 further includes an NFC chip 14, which can be disposed in the first part 10 or in the second part 20, for example, in the first part 10 as shown in FIG7 .
  • the NFC chip 14 can be disposed on a main board of the first part 10, or a smaller independent circuit board can be disposed in the first part 10, and the NFC chip 14 can be integrated into the independent circuit board.
  • the NFC chip 14 is used to provide an NFC excitation current, which may be a differential excitation current.
  • the NFC chip 14 is electrically connected to the first antenna 11 and the second antenna 21 to feed the NFC excitation current to the first antenna 11 and the second antenna 21.
  • the first antenna 11 and the second antenna 21 generate an NFC radiation field to transmit an NFC signal to the outside.
  • the NFC chip 14 includes a first differential signal terminal 141 and a second differential signal terminal 142.
  • the first differential signal terminal 141 may be a positive (+) port of the NFC chip 14, and the second differential signal terminal 142 may be a negative (-) port of the NFC chip 14.
  • the first differential signal terminal 141 and the second differential signal terminal 142 are used to provide the NFC excitation current.
  • the NFC excitation current provided by the NFC chip 14 may be output via the first differential signal terminal 141, and flow back to the NFC chip 14 via the second differential signal terminal 142, thereby forming a current loop.
  • the first antenna 11 includes a first electrical connection point 111 and a second electrical connection point 112.
  • the first electrical connection point 111 and the second electrical connection point 112 may be, for example, two free ends of the NFC coil 11.
  • the second antenna 21 includes a third electrical connection point 211 and a fourth electrical connection point 212.
  • the third electrical connection point 211 and the fourth electrical connection point 212 are arranged at intervals.
  • the third electrical connection point 211 and the fourth electrical connection point 212 may be, for example, two electrical contacts on the second antenna 21.
  • the first electrical connection point 111 is electrically connected to the first differential signal terminal 141
  • the third electrical connection point 211 is electrically connected to the second electrical connection point 112
  • the fourth electrical connection point 212 is electrically connected to the second differential signal terminal 142.
  • the antenna 11 is connected in series with the second antenna 21. After the NFC chip 14 feeds the NFC excitation current to the first antenna 11 and the second antenna 21, the first antenna 11, the second antenna 21 and the NFC chip 14 form a current loop together.
  • a printed circuit may be provided between the NFC chip 14, the first antenna 11, and the second antenna 21.
  • the first differential signal terminal 141 and the second differential signal terminal 142 may be electrically connected to the printed circuit through the chip pins
  • the first electrical connection point 111 and the second electrical connection point 112 may be electrically connected to the printed circuit through the FPC socket
  • the third electrical connection point 211 and the fourth electrical connection point 212 may be electrically connected to the printed circuit through the metal spring, thereby realizing the electrical connection between the NFC chip 14 and the first antenna 11 and the second antenna 21.
  • FIG8 is a schematic diagram of the flow direction of the NFC current in the electronic device 100 shown in FIG7 , and the dotted arrow in the figure indicates the flow direction of the NFC current.
  • the NFC current can flow from the NFC chip 14 to the first antenna 11, from the first antenna 11 to the second antenna 21, and then from the second antenna 21 back to the NFC chip 14, so as to form a complete current loop.
  • FIG9 is a fifth structural schematic diagram of an electronic device 100 in an unfolded state provided in an embodiment of the present application.
  • the difference between the electronic device 100 shown in FIG9 and the electronic device 100 shown in FIG7 is that the electrical connection relationship between the NFC chip 14 and the first antenna 11 and the second antenna 21 is different.
  • the differences are described below, and the similarities can refer to the description in the above embodiment, which will not be repeated here.
  • the first electrical connection point 111 is electrically connected to the first differential signal terminal 141
  • the second electrical connection point 112 is electrically connected to the second differential signal terminal 142
  • the third electrical connection point 211 is electrically connected to the first differential signal terminal 141
  • the fourth electrical connection point 212 is electrically connected to the second differential signal terminal 142.
  • the first antenna 11 is connected in parallel with the second antenna 21.
  • FIG. 10 is a schematic diagram of the flow direction of the NFC current in the electronic device 100 shown in FIG. 9, in which the dotted arrow indicates the flow direction of the NFC current.
  • the NFC current flows from the NFC chip 14 to the first antenna 11, it flows back to the NFC chip 14 via the first antenna 11, forming a complete current loop.
  • the NFC current flows from the NFC chip 14 to the second antenna 21, it flows back to the NFC chip 14 via the second antenna 21, also forming a complete current loop.
  • the direction of the NFC radiation field generated by the first antenna 11 is the same as the direction of the NFC radiation field generated by the second antenna 21, so that the NFC radiation field generated by the first antenna 11 and the NFC radiation field generated by the second antenna 21 are superimposed on each other, thereby enhancing the field strength of the overall NFC radiation field of the electronic device 100, thereby enhancing the strength of the NFC signal and increasing the card swiping distance and card swiping area range of the NFC function.
  • Figure 11 is a schematic diagram of the flow direction of the NFC current when the electronic device 100 provided in an embodiment of the present application is in a folded state
  • Figure 12 is a schematic diagram of the NFC radiation field when the electronic device 100 provided in an embodiment of the present application is in a folded state.
  • the first antenna 11 (for example, an NFC coil) generates a first NFC current i 1 when transmitting an NFC signal. It is understandable that, since the NFC coil 11 is a ring coil, the direction of the first NFC current i 1 may be different at different parts of the NFC coil 11.
  • the first NFC current i 1 causes the NFC coil 11 to generate a first NFC radiation field M1, and the direction of the first NFC radiation field M1 is shown in FIG. 12 .
  • a second NFC current i 2 is generated.
  • the second NFC current i 2 causes the metal branch 21 to generate a second NFC radiation field M2, and the direction of the second NFC radiation field M2 is shown in FIG12 .
  • the direction of the first NFC current i1 of the portion of the NFC coil 11 close to the metal branch 21 is opposite to the direction of the second NFC current i2 in the metal branch 21, as shown by the dotted arrow in FIG11. Therefore, the direction of the first NFC radiation field M1 is the same as the direction of the second NFC radiation field M2, as shown in FIG12.
  • the first NFC radiation field M1 and the second NFC radiation field M2 can be superimposed on each other, thereby enhancing the field strength of the NFC radiation field around the NFC coil 11 and the metal branch 21, and further enhancing the field strength of the overall NFC radiation field of the electronic device 100.
  • the relative position relationship between the first antenna 11 and the second antenna 21 and/or the connection relationship between the first antenna 11, the second antenna 21 and the NFC chip 14 can also be reasonably set, so that when the electronic device 100 is in a folded state, the direction of the first NFC current i1 of the part of the first antenna 11 close to the second antenna 21 is opposite to the direction of the second NFC current i2 in the second antenna 21, so that the direction of the NFC radiation field generated by the first antenna 11 is the same as the direction of the NFC radiation field generated by the second antenna 21, so that the two can be superimposed on each other to enhance the field strength of the overall NFC radiation field of the electronic device 100, thereby enhancing the strength of the NFC signal and improving the card swiping distance and card swiping area range of the NFC function.
  • the electronic device 100 provided in the embodiment of the present application has a first antenna 11 disposed in the first part 10 and a second antenna 21 disposed in the second part 20. Both the first antenna 11 and the second antenna 21 can be used to transmit NFC signals, so the NFC card swiping function can be realized in the areas where the first part 10 and the second part 20 are located, which can increase the NFC card swiping area of the electronic device 100.
  • the NFC radiation fields of the two can be superimposed on each other, which can enhance the field strength of the overall NFC radiation field of the electronic device 100, thereby enhancing the strength of the NFC signal, and thus can further increase the NFC card swiping area of the electronic device 100. Therefore, the user can realize the NFC card swiping function through different parts of the electronic device 100, thereby improving the convenience of using the NFC function of the electronic device 100.
  • the first antenna 11 and the second antenna 21 can also be used to transmit non-NFC signals to implement the non-NFC communication function of the electronic device 100.
  • the first antenna 11 can be used to transmit non-NFC signals
  • the second antenna 21 can be used to transmit non-NFC signals
  • both the first antenna 11 and the second antenna 21 can be used to transmit non-NFC signals.
  • the non-NFC signal may include one of a cellular network signal, a Wi-Fi (Wireless Fidelity) signal, a GPS (Global Positioning System) signal, and a BT (Bluetooth) signal.
  • the cellular network signal may include communication signals of different modes such as 4G and 5G.
  • wireless communication functions such as Wi-Fi, GPS, and BT can also be implemented through the first antenna 11 and the second antenna 21.
  • FIG. 13 is a sixth structural schematic diagram of the electronic device 100 in the unfolded state provided in an embodiment of the present application.
  • the electronic device 100 further includes a first non-NFC chip 15.
  • the first non-NFC chip 15 is disposed on the first part 10 or the second part 20, for example, on a main board of the first part 10.
  • the first non-NFC chip 15 is used to provide a first non-NFC excitation current.
  • the first non-NFC chip 15 is a communication chip in other forms except the NFC chip, for example, a cellular communication chip, a Wi-Fi chip, a GPS chip, a BT chip, etc.
  • the first non-NFC excitation current is an excitation current of a communication signal in other forms except the NFC excitation current, for example, a cellular communication excitation current, a Wi-Fi excitation current, a GPS excitation current, a BT excitation current, etc.
  • the first non-NFC chip 15 is electrically connected to the first antenna 11 to feed a first non-NFC excitation current into the first antenna 11, so that the first antenna 11 transmits the first non-NFC excitation current, thereby radiating a non-NFC signal corresponding to the first non-NFC excitation current to the outside, thereby realizing a corresponding communication function.
  • the first non-NFC chip 15 may be a cellular communication chip, such as a 4G communication chip, and the first non-NFC excitation current is a 4G communication excitation current.
  • the 4G communication chip feeds the 4G communication excitation current to the first antenna 11, the first antenna 11 transmits the 4G communication excitation current, thereby transmitting a 4G communication signal to the outside world, thereby realizing the 4G communication function.
  • a grounding point can be set on the first antenna 11, and the grounding point is grounded. Therefore, the first non-NFC excitation current (for example, the 4G communication excitation current) can be returned to the ground through the grounding point to form a current loop.
  • the NFC excitation current is a differential excitation current, so the NFC excitation current will not be returned to the ground through the grounding point, but will flow back to the NFC chip 14 to form a current loop for NFC communication.
  • the first antenna 11 can be used to implement both NFC communication and non-NFC communication, for example, to implement 4G communication, so that the first antenna 11 can be reused. Therefore, the total number of antennas in the electronic device 100 can be reduced, the antenna design of the electronic device 100 can be simplified, and the internal space of the electronic device 100 can be saved.
  • the electronic device 100 further includes a first isolation circuit 16 and a second isolation circuit 17 .
  • the first isolation circuit 16 is disposed between the first antenna 11 and the NFC chip 14, and is electrically connected to the first antenna 11 and the NFC chip 14.
  • the first isolation circuit 16 is used to filter out the first non-NFC excitation current to reduce or avoid interference of the first non-NFC excitation current on NFC communication.
  • the second isolation circuit 17 is disposed between the first antenna 11 and the first non-NFC chip 15, and is electrically connected to the first antenna 11 and the first non-NFC chip 15.
  • the second isolation circuit 17 is used to filter out the NFC excitation current to reduce or avoid interference of the NFC excitation current with the communication (e.g., 4G communication) of the first non-NFC chip 15.
  • the first isolation circuit 16 and the second isolation circuit 17 may include filter elements such as capacitors and inductors to filter out interference signals.
  • the specific forms of the first isolation circuit 16 and the second isolation circuit 17 and the parameters of the filter elements used may be set according to actual needs.
  • FIG14 is a schematic diagram of the connection relationship between the first isolation circuit 16, the second isolation circuit 17, and the first antenna 11 in the electronic device shown in FIG13.
  • the node P1 is used to connect the NFC chip 14
  • the node P2 is used to connect the first non-NFC chip 15.
  • the first isolation circuit 16 includes an inductor L11 and a capacitor C11.
  • the inductor L11 is connected between the first antenna 11 and the node P1.
  • One end of the capacitor C11 is connected between the inductor L11 and the node P1, and the other end is grounded.
  • the inductor L11 blocks high frequencies and passes low frequencies, thereby preventing the first non-NFC excitation current (such as the 4G communication excitation current) from interfering with the NFC communication; the capacitor C11 is used to prevent the low-frequency signal of the NFC communication from returning to the ground.
  • the second isolation circuit 17 includes a capacitor C12. One end of the capacitor C12 is connected to the first antenna 11, and the other end is connected to the node P2.
  • the capacitor C12 is used to block low frequencies from passing high frequencies, thereby preventing the NFC excitation current from interfering with the communication (eg, 4G communication) of the first non-NFC chip 15.
  • the mutual interference between NFC communication and the first non-NFC communication can be reduced, and the stability of NFC communication and the stability of the first non-NFC communication (such as 4G communication) can be improved.
  • FIG. 15 is a seventh structural schematic diagram of the electronic device 100 in an unfolded state provided in an embodiment of the present application.
  • the electronic device 100 further includes a second non-NFC chip 23.
  • the second non-NFC chip 23 is disposed in the first part 10 or the second part 20.
  • a circuit board may be disposed in the second part 20, and the second non-NFC chip 23 is disposed on the circuit board of the second part 20.
  • the second non-NFC chip 23 is used to provide a second non-NFC excitation current.
  • the second non-NFC chip 23 is a communication chip in other forms besides the NFC chip, for example, a cellular communication chip, a Wi-Fi chip, a GPS chip, a BT chip, etc.
  • the second non-NFC excitation current may also be a cellular communication excitation current, a Wi-Fi excitation current, a GPS excitation current, a BT excitation current, etc.
  • the second non-NFC chip 23 is electrically connected to the second antenna 21 to feed a second non-NFC excitation current into the second antenna 21, so that the second antenna 21 transmits the second non-NFC excitation current, thereby radiating a non-NFC signal corresponding to the second non-NFC excitation current to the outside, thereby realizing a corresponding communication function.
  • the second non-NFC chip 23 may be a cellular communication chip, such as a 5G communication chip, and the second non-NFC excitation current is a 5G communication excitation current.
  • the 5G communication chip feeds the 5G communication excitation current to the second antenna 21, the second antenna 21 transmits the 5G communication excitation current, thereby transmitting a 5G communication signal to the outside world, thereby realizing the 5G communication function.
  • a grounding point can be set on the second antenna 21, and the grounding point is grounded. Therefore, the second non-NFC excitation current (such as the 5G communication excitation current) can be returned to the ground through the grounding point to form a current loop. The NFC excitation current will not be returned to the ground through the grounding point, but will flow back to the NFC chip 14 to form an NFC communication loop. Current loop.
  • the second antenna 21 can be used to implement both NFC communication and non-NFC communication, such as 5G communication, so that the second antenna 21 can be reused.
  • the total number of antennas in the electronic device 100 can be reduced, the antenna design of the electronic device 100 can be simplified, and the internal space of the electronic device 100 can be saved.
  • the electronic device 100 may include both the first non-NFC chip 15 and the second non-NFC chip 23.
  • the first antenna 11 and the second antenna 21 can be reused at the same time, which is more conducive to reducing the total number of antennas in the electronic device 100.
  • the electronic device 100 further includes a third isolation circuit 24 and a fourth isolation circuit 25 .
  • the third isolation circuit 24 is disposed between the second antenna 21 and the NFC chip 14, and is electrically connected to the second antenna 21 and the NFC chip 14.
  • the third isolation circuit 24 is used to filter out the second non-NFC excitation current to reduce or avoid interference of the second non-NFC excitation current on NFC communication.
  • the fourth isolation circuit 25 is disposed between the second antenna 21 and the second non-NFC chip 23, and is electrically connected to the second antenna 21 and the second non-NFC chip 23.
  • the fourth isolation circuit 25 is used to filter out the NFC excitation current to reduce or avoid interference of the NFC excitation current with the communication (e.g., 5G communication) of the second non-NFC chip 23.
  • the third isolation circuit 24 and the fourth isolation circuit 25 may also include filter elements such as capacitors and inductors to filter out interference signals.
  • filter elements such as capacitors and inductors to filter out interference signals.
  • the specific forms of the third isolation circuit 24 and the fourth isolation circuit 25 and the parameters of the filter elements used may be set according to actual needs.
  • FIG16 is a schematic diagram of the connection relationship between the third isolation circuit 24, the fourth isolation circuit 25, and the second antenna 21 in the electronic device shown in FIG15.
  • the node P3 is used to connect the NFC chip 14
  • the node P4 is used to connect the second non-NFC chip 23.
  • the third isolation circuit 24 includes an inductor L21 and a capacitor C21.
  • the inductor L21 is connected between the second antenna 21 and the node P3.
  • One end of the capacitor C21 is connected between the inductor L21 and the node P3, and the other end is grounded.
  • the inductor L21 blocks high frequency and passes low frequency, preventing the second non-NFC excitation current (such as 5G communication excitation current) from interfering with NFC communication; the capacitor C21 is used to prevent the low-frequency signal of NFC communication from returning to the ground.
  • the second non-NFC excitation current such as 5G communication excitation current
  • the fourth isolation circuit 25 includes a capacitor C22. One end of the capacitor C22 is connected to the second antenna 21, and the other end is connected to the node P4. The capacitor C22 is used to block the low frequency from passing the high frequency, so as to prevent the NFC excitation current from interfering with the communication (such as 5G communication) of the second non-NFC chip 23.
  • the third isolation circuit 24 and the fourth isolation circuit 25 can be reduced, and the stability of NFC communication and the stability of the second non-NFC communication (such as 5G communication) can be improved.
  • FIG. 17 is a schematic diagram of the antenna circuit structure in the electronic device 100 provided in an embodiment of the present application.
  • the circuit structure schematic diagram is an example in a practical application, but the present application is not limited thereto.
  • the NFC chip (NFC IC) 14 includes ports K1, K2, K3, and K4. Ports K1 and K2 may be, for example, two sub-ports of the first differential signal terminal 141, and ports K3 and K4 may be, for example, two sub-ports of the second differential signal terminal 142.
  • Port K2 is connected to one end of the inductor L0, the other end of the inductor L0 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the first antenna 11, and the capacitor C2' is connected in parallel with the capacitor C2.
  • the first antenna 11 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the second antenna 21 and one end of the capacitor C8, and the other end of the capacitor C8 is grounded.
  • One end of the capacitor C6 is connected between the first antenna 11 and the inductor L1, and the other end of the capacitor C6 is grounded.
  • One end of the capacitor C7 is connected between the inductor L1 and the second antenna 21, and the other end of the capacitor C7 is grounded.
  • the port K1 is connected to one end of the resistor Rrx, the other end of the resistor Rrx is connected to one end of the capacitor Crx, and the other end of the capacitor Crx is connected between the inductor L0 and the capacitor C2.
  • Port K3 is connected to one end of the inductor L0', the other end of the inductor L0' is connected to one end of the capacitor C3, and the capacitor C3' is connected in parallel.
  • the other end of the capacitor C3 is connected to one end of the inductor L1', the other end of the inductor L1' is connected to the second antenna 21 and one end of the capacitor C8', and the other end of the capacitor C8' is connected to the second non-NFC chip 23.
  • Port K4 is connected to one end of the resistor Rrx’, the other end of the resistor Rrx’ is connected to one end of the capacitor Crx’, and the other end of the capacitor Crx’ is connected between the inductor L0’ and the capacitor C3.
  • capacitor C0 is connected in series with capacitor C1
  • one end is connected between inductor L0 and capacitor C2
  • the other end is connected between inductor L0' and capacitor C3, and the ground is connected between capacitor C0' and capacitor C1'.
  • capacitor C4 is connected in series with capacitor C5, one end is connected between capacitor C2 and the first antenna 11, the other end is connected between capacitor C3 and inductor L1', and the ground is connected between capacitor C4 and capacitor C5.
  • capacitor C4' is connected in series with capacitor C5', one end is connected between capacitor C2 and the first antenna 11, the other end is connected between capacitor C3 and inductor L1', and the ground is connected between capacitor C4' and capacitor C5'.
  • inductor L1, capacitor C6, capacitor C8, inductor L1', capacitor C6', capacitor C8' can play the role of filtering and isolation, and other components such as capacitors, inductors, resistors, etc. can play the role of impedance matching and filtering.
  • the inductor L1 is 20nH
  • the inductor L1' is 68nH
  • the capacitors C6, C8, C6', and C8' are all 100pF.
  • FIG. 18 is a schematic diagram of the NFC card swiping position when the electronic device 100 is in the view shown in FIG. 1
  • FIG. 19 is a schematic diagram of the NFC card swiping position when the electronic device 100 is in the view shown in FIG. 2
  • the back side of the electronic device 100 (the view shown in FIG. 18 , the side where the camera module 12 is located) has two card swiping positions A and B
  • the front side (the view shown in FIG. 19 , the side where the display screen 40 is located) has two card swiping positions C and D.
  • the NFC card swiping height (or understood as the NFC card swiping distance) data of the card swiping positions A, B, C, and D are shown in Table 1.
  • “large coil POS”, “medium coil POS” and “small coil POS” indicate the sizes of the NFC coils
  • “unfolded state” indicates that the electronic device 100 is in the unfolded state
  • “folded state” indicates that the electronic device 100 is in the folded state.
  • the electronic device 100 of the embodiment of the present application can enhance the field strength of the overall NFC radiation field of the electronic device 100, thereby increasing the area of the NFC card swiping area of the electronic device 100, and can increase the NFC card swiping height (or understood as the NFC card swiping distance).
  • the requirement for the size of the POS coil can be reduced, and the application scope of the NFC card swiping scenario of the electronic device can be improved, and the requirement for the card swiping distance/card swiping height can be reduced.
  • NFC communication with external devices can still be performed normally within a larger distance/height range, which is convenient for users to adopt more postures for NFC card swiping, thereby improving the convenience of using the NFC function.

Landscapes

  • Near-Field Transmission Systems (AREA)

Abstract

Dispositif électronique pliable, comprenant une première partie et une seconde partie, la première partie et la seconde partie pouvant tourner relativement à un état plié ou à un état déplié. Le dispositif électronique pliable comprend en outre : une première antenne, qui est disposée sur la première partie, la première antenne étant utilisée pour transmettre un signal NFC ; et une seconde antenne, qui est disposée sur la seconde partie, la seconde antenne étant utilisée pour transmettre un signal NFC, et lorsque le dispositif électronique est dans l'état plié, la direction d'un champ de rayonnement NFC produit par la première antenne est la même que la direction d'un champ de rayonnement NFC produit par la seconde antenne.
PCT/CN2023/115048 2022-10-20 2023-08-25 Dispositif électronique pliable WO2024082821A1 (fr)

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CN112993546A (zh) * 2021-02-05 2021-06-18 维沃移动通信有限公司 电子设备
CN112993528A (zh) * 2021-02-23 2021-06-18 维沃移动通信有限公司 电子设备
CN112993545A (zh) * 2021-02-05 2021-06-18 维沃移动通信有限公司 折叠电子设备
CN114389013A (zh) * 2022-01-17 2022-04-22 Oppo广东移动通信有限公司 天线装置及电子设备
EP4040272A1 (fr) * 2020-01-22 2022-08-10 Hideep Inc. Stylet, module d'antenne, capteur tactile et dispositif électronique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011015511A1 (fr) * 2009-08-07 2011-02-10 Siemens Aktiengesellschaft Antenne pour systèmes d'identification radiofréquence, procédés de configuration de celle-ci et lecteur d'identification radiofréquence
US20180114042A1 (en) * 2015-07-31 2018-04-26 Murata Manufacturing Co., Ltd. Feeder coil, antenna device, and electronic appliance
US20180121781A1 (en) * 2015-07-31 2018-05-03 Murata Manufacturing Co., Ltd. Feeder coil, antenna device, and electronic appliance
CN109167151A (zh) * 2018-08-29 2019-01-08 Oppo广东移动通信有限公司 电子设备
EP4040272A1 (fr) * 2020-01-22 2022-08-10 Hideep Inc. Stylet, module d'antenne, capteur tactile et dispositif électronique
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CN112993545A (zh) * 2021-02-05 2021-06-18 维沃移动通信有限公司 折叠电子设备
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