Notebook computer

Abstract

The utility model provides a notebook computer, and belongs to the technical field of notebook computers. The notebook computer comprises a display part, a system part, a rotating shaft and an opening and closing detection device, and the opening and closing detection device comprises an NFC transmitting coil, an NFC receiving coil and a control circuit; the NFC transmitting coil is arranged on the display part; the NFC receiving coil is arranged on the system part; and the control circuit is arranged on the main board and is electrically connected with the NFC transmitting coil and the NFC receiving coil so as to respectively receive signals sent by the NFC transmitting coil and the NFC receiving coil and determine the opening and closing states of the display part and the system part according to the received signals. According to the notebook computer, the NFC transmitting coil and the NFC receiving coil are utilized, low-cost opening and closing detection can be achieved, and the cost of the notebook computer can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of notebook computers, in particular to a notebook computer. Background Art

[0002] Taking into account the needs of portability and safety, laptops with opening and closing or folding functions have emerged.

[0003] In the related art, a laptop computer can detect its own opening and closing state, so as to realize functions such as automatic power on or unlocking in the open state, and automatic power off or screen lock in the closed state.

[0004] However, the opening and closing state detection in the related technology usually relies on Hall elements and magnet trigger induction. Hall elements are relatively expensive and have problems such as easy false touch and poor anti-interference. Utility Model Content

[0005] The utility model provides a notebook computer, which can solve the problems of high cost of Hall elements, easy mis-touch and poor anti-interference performance.

[0006] The technical solution is as follows:

[0007] A laptop computer, comprising:

[0008] The display part comprises a first shell and a display screen embedded in the first shell;

[0009] The system part includes a second housing and a keyboard, a mainboard, a central processing unit and a graphics card arranged in the second housing;

[0010] A rotating shaft, connecting the first shell and the second shell respectively, so that the display part can rotate relative to the system part to realize the opening and closing of the two;

[0011] The laptop computer further includes: an opening and closing detection device, the opening and closing detection device is used to detect the opening and closing status of the display part and the system part, the opening and closing detection device includes: an NFC transmitting coil, an NFC receiving coil and a control circuit;

[0012] The NFC transmitting coil is arranged on the display part;

[0013] The NFC receiving coil is arranged in the system part;

[0014] The control circuit is arranged on the main board and is electrically connected to the NFC transmitting coil and the NFC receiving coil respectively to receive signals sent by the two respectively, and determines the opening and closing states of the display part and the system part according to the received signals.

[0015] In some embodiments, the rotating shaft is located on one side of the display portion, and the NFC transmitting coil is disposed on the other side of the display portion.

[0016] In some embodiments, a first functional circuit board is disposed on the other side of the display portion, and the NFC transmitting coil is located on the first functional circuit board.

[0017] In some embodiments, the first functional circuit board is further provided with a camera module, and the camera module and the NFC transmitting coil are arranged in parallel on the first functional circuit board.

[0018] In some embodiments, the rotating shaft is located on one side of the system part, and the NFC receiving coil is disposed on the other side of the system part.

[0019] In some embodiments, a second functional circuit board is provided on the other side of the system part, and the NFC receiving coil is located on the second functional circuit board.

[0020] In some embodiments, the second functional circuit board is further provided with a touch module, the touch module includes a touch panel, and the NFC receiving coil is located below the touch panel.

[0021] In some embodiments,

[0022] The NFC transmitting coil is used to transmit a first signal to the NFC receiving coil and input the first signal into the control circuit;

[0023] The NFC receiving coil is used to receive the first signal, generate a second signal according to the first signal and input the second signal into the control circuit,

[0024] The control circuit is used to determine the phase difference Δω between the first signal and the second signal, and determine the open and closed states of the display part and the system part when the phase difference Δω satisfies a first target range.

[0025] In some embodiments, the control circuit includes a phase difference measuring unit and a comparison unit, the phase difference measuring unit is electrically connected to the NFC transmitting coil and the NFC receiving coil, respectively, receives the first signal and the second signal, and outputs a phase difference Δω between the first signal and the second signal, the comparison unit is electrically connected to the phase difference measuring unit, the comparison unit receives the phase difference Δω, compares the phase difference Δω with a first target range, and when the phase difference Δω satisfies the first target range, determines that the display part and the system part are in a first opening and closing state corresponding to the first target range.

[0026] In some embodiments, the laptop computer further comprises a data transmission circuit;

[0027] The data transmission circuit is electrically connected to at least one of the NFC transmitting coil and the NFC receiving coil, and the data transmission circuit performs wireless data transmission with an external device through the NFC transmitting coil or the NFC receiving coil.

[0028] In some embodiments, the laptop computer further comprises a device lock circuit and an NFC key coil;

[0029] The device lock circuit is electrically connected to at least one of the NFC transmitting coil and the NFC receiving coil, and the device lock circuit wirelessly communicates with the NFC key coil through the NFC transmitting coil or the NFC receiving coil.

[0030] In some embodiments, the laptop computer further comprises a payment identification circuit;

[0031] The payment identification circuit is electrically connected to at least one of the NFC transmitting coil and the NFC receiving coil, and the payment identification circuit wirelessly communicates with an external payment device through the NFC transmitting coil or the NFC receiving coil.

[0032] The beneficial effects brought by the technical solution provided by the utility model include at least:

[0033] The laptop computer of the utility model comprises an NFC transmitting coil, an NFC receiving coil and a control circuit; wherein the NFC transmitting coil and the NFC receiving coil are respectively located on a display part and a system part, the NFC transmitting coil transmits a signal to the NFC receiving coil, the control circuit compares the phases of a first signal transmitted by the NFC transmitting coil and a second signal received by the NFC receiving coil, and by comparing whether the phase difference falls within a first target range, it can be determined whether the display part and the system part are in a first opening and closing state; since NFC technology is widely used in the field of electronic technology and has the characteristics of simple structure and low cost, the opening and closing detection of the laptop computer is performed by using the NFC transmitting coil and the NFC receiving coil, so that low-cost opening and closing detection can be realized, which is conducive to reducing the cost of the laptop computer; the NFC transmitting coil and the NFC receiving coil determine the opening and closing state by using the electromagnetic wave phase difference, which is conducive to improving the anti-interference performance and improving the detection accuracy of the opening and closing detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural schematic diagram of a notebook computer provided by an embodiment of the utility model;

[0036] Figure 2 It is a structural schematic diagram of the display part and the system part provided by the embodiment of the utility model in the first opening and closing state;

[0037] Figure 3 It is a structural schematic diagram of an opening and closing detection device provided by another embodiment of the utility model;

[0038] Figure 4 It is a schematic diagram of the phase difference between the first signal and the second signal when the display part and the system part provided by the embodiment of the utility model are in the first opening and closing state;

[0039] Figure 5 It is a structural schematic diagram of the display part and the system part provided by the embodiment of the utility model in the second opening and closing state;

[0040] Figure 6 It is a schematic diagram of the phase difference between the first signal and the second signal when the display part and the system part provided by the embodiment of the utility model are in the second opening and closing state;

[0041] Figure 7 It is a schematic diagram of the structure of the display part and the system part provided by the embodiment of the utility model in the third opening and closing state;

[0042] Figure 8 It is a schematic diagram of the phase difference between the first signal and the second signal when the display part and the system part provided by the embodiment of the utility model are in the third opening and closing state;

[0043] Fig. 9 It is a structural schematic diagram of the display part and the system part provided by the embodiment of the utility model in the fourth opening and closing state;

[0044] Fig.10 It is a schematic diagram of the phase difference between the first signal and the second signal when the display part and the system part provided by the embodiment of the utility model are in the fourth opening and closing state;

[0045] Fig.11 It is a structural schematic diagram of a notebook computer provided by another embodiment of the utility model;

[0046] Fig.12It is a structural schematic diagram of a first functional circuit board provided by an embodiment of the utility model;

[0047] Fig.13 It is a connection diagram of a data transmission circuit and an opening and closing detection device provided by an embodiment of the utility model;

[0048] Fig.14 It is a schematic diagram of the connection between the device lock circuit and the opening and closing detection device provided in the embodiment of the utility model;

[0049] Fig.15 It is a connection diagram of a payment identification circuit and an opening and closing detection device provided in an embodiment of the utility model.

[0050] The reference numerals in the figures represent respectively:

[0051] 100. Display part;

[0052] 1001, first housing; 1002, display screen;

[0053] 200, system part;

[0054] 2001, second housing; 2002, keyboard;

[0055] 300, rotating shaft;

[0056] 1. NFC transmitting coil;

[0057] 2. NFC receiving coil;

[0058] 3. Control circuit;

[0059] 31. Phase difference measuring unit; 32. Comparing unit;

[0060] 4. The first functional circuit board;

[0061] 41. Camera module;

[0062] 5. Second function circuit board;

[0063] 51. Touchpad;

[0064] 6. Data transmission circuit;

[0065] 7. Equipment lock circuit;

[0066] 8. Payment identification circuit;

[0067] A. Opening and closing angle. DETAILED DESCRIPTION

[0068] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] It should be understood that in the present utility model, "electrical connection" can be understood as the physical contact and electrical conduction of components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Communication connection" can refer to electrical signal transmission, including wireless communication connection and wired communication connection. Wireless communication connection does not require a physical medium and does not belong to a connection relationship that limits the product structure. "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship, that is, A is connected to B or A is connected to B, which can mean that there is a fastening component (such as screws, bolts, rivets, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0071] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0072] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0073] Combination Figure 1 and Figure 2 As shown, this embodiment provides a laptop computer, including:

[0074] The display part 100 includes a first shell 1001 and a display screen 1002 embedded in the first shell 1001; the system part 200 includes a second shell 2001 and a keyboard 2002, a motherboard, a central processing unit and a graphics card (not shown in the figure) arranged in the second shell 2001; the hinge 300 connects the first shell 1001 and the second shell 2001 respectively, so that the display part 100 can rotate relative to the system part 200 to realize the opening and closing of the two.

[0075] The laptop computer further includes: an opening and closing detection device, which is used to detect the opening and closing status of the display part 100 and the system part 200, and the opening and closing detection device includes: an NFC transmitting coil 1, an NFC receiving coil 2 and a control circuit 3.

[0076] The NFC transmitting coil 1 is arranged in the display part 100; the NFC receiving coil 2 is arranged in the system part 200; the control circuit 3 is arranged on the main board and is electrically connected to the NFC transmitting coil 1 and the NFC receiving coil 2 respectively to receive the signals sent by the two respectively, and determine the opening and closing states of the display part 100 and the system part 200 according to the received signals. Among them, the NFC transmitting coil 1 can also be arranged in the system part 200; the NFC receiving coil 2 can also be arranged in the display part 100.

[0077] The laptop computer of the utility model comprises an NFC transmitting coil 1, an NFC receiving coil 2 and a control circuit 3; wherein the NFC transmitting coil 1 and the NFC receiving coil 2 are respectively located on a display part 100 and a system part 200, the NFC transmitting coil 1 transmits a signal to the NFC receiving coil 2, the control circuit 3 performs a phase comparison on a first signal transmitted by the NFC transmitting coil 1 and a second signal received by the NFC receiving coil 2, and by comparing whether a phase difference Δω falls within a first target range, it can be determined whether the display part 100 and the system part 200 are in a first opening and closing state.

[0078] NFC stands for Near Field Communication, which is a short-range wireless communication technology that allows devices to transmit and exchange data without contact. NFC technology is widely used in mobile payment, data transmission, access control systems and other fields.

[0079] Since NFC technology is widely used in the field of electronic technology and has the characteristics of simple structure and low cost, the opening and closing detection of the laptop computer is performed using the NFC transmitting coil 1 and the NFC receiving coil 2, which can realize low-cost opening and closing detection and is conducive to reducing the cost of the laptop computer.

[0080] The NFC transmitting coil 1 and the NFC receiving coil 2 use the electromagnetic wave phase difference Δω to determine the opening and closing state, which is beneficial to improving the anti-interference performance and improving the detection accuracy of the opening and closing detection device.

[0081] Combination Figure 2 As shown, in some embodiments, the hinge 300 is located on one side of the display portion 100 , the side of the display portion 100 is rotationally connected to one side of the system portion 200 , and the NFC transmitting coil 1 is located on the other side of the display portion 100 .

[0082] In other embodiments, the hinge 300 is located on one side of the system portion 200 , the side of the system portion 200 is rotatably connected to one side of the display portion 100 , and the NFC receiving coil 2 is disposed on the other side of the system portion 200 .

[0083] Through the above arrangement, the distance between the NFC transmitting coil 1 and the NFC receiving coil 2 changes the most during the opening and closing process of the display part 100 and the system part 200, and a smaller opening and closing angle A can correspond to a larger phase difference, which is beneficial to improving the detection efficiency and detection sensitivity of the opening and closing detection device.

[0084] Combination Figure 3 As shown, in some embodiments, the control circuit 3 includes a phase difference measurement unit 31 and a comparison unit 32. The phase difference measurement unit 31 is electrically connected to the NFC transmitting coil 1 and the NFC receiving coil 2, respectively, receives the first signal and the second signal, and outputs the phase difference Δω between the first signal and the second signal. The comparison unit 32 is electrically connected to the phase difference measurement unit 31, receives the phase difference Δω, compares the phase difference Δω with the first target range, and determines that the display part 100 and the system part 200 are in the first open and closed state when the phase difference Δω meets the first target range. The first open and closed state corresponds to the first target range.

[0085] The phase difference between the first signal and the second signal is measured by the phase difference measuring unit 31, and the comparison unit 32 compares the phase difference with the first target range. When it is determined that the phase difference meets the first target range, it indicates that the opening and closing state of the display part 100 and the system part 200 is the first opening and closing state.

[0086] In some possible implementations, the opening and closing states of the display part 100 and the system part 200, and the corresponding opening and closing angle A of the display part 100 and the system part 200, range from 0 to 180 degrees, for example, 0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, and the like.

[0087] refer to Figure 2As shown, in some possible implementations, the display part 100 and the system part 200 are in a first opening and closing state, and the corresponding opening and closing angle A is an acute angle greater than 0 and less than 90 degrees. Figure 4 It shows the phase difference Δω1 between the first signal and the second signal in the first opening and closing state, which meets the first target range.

[0088] refer to Figure 5 As shown, the display part 100 and the system part 200 are in the second opening and closing state, and the corresponding opening and closing angle A is an obtuse angle greater than 90 and less than 145 degrees. Figure 6 It shows the phase difference Δω2 between the first signal and the second signal in the second opening and closing state, which meets the second target range.

[0089] refer to Figure 7 As shown, the display part 100 and the system part 200 are in the third opening and closing state, and the corresponding opening and closing angle A is an obtuse angle greater than 145 and less than 180 degrees. Figure 8 The phase difference Δω3 between the first signal and the second signal in the third opening and closing state is shown, which meets the third target range.

[0090] refer to Fig. 9 As shown, the display part 100 and the system part 200 are in the fourth opening and closing state, and the corresponding opening and closing angle A is 0 degree or infinitely close to 0 degree. Fig.10 The phase difference Δω4 between the first signal and the second signal in the fourth opening and closing state is shown, which meets the fourth target range.

[0091] Through the above Figure 2 , Figure 5 , Figure 7 and Fig. 9 It can be seen that in the fourth opening and closing state, the display part 100 and the system part 200 are basically closed, in the first switch state and the second opening and closing state, the display part 100 and the system part 200 are further opened, and in the third opening and closing state, the display part 100 and the system part 200 are basically fully opened. Figure 4 , Figure 6 , Figure 8 and Fig.10 It can be seen that the phase difference Δω4 corresponding to the fourth opening and closing state is the smallest, and the phase difference Δω3 corresponding to the third opening and closing state is the largest, that is, Δω3>Δω2>Δω1>Δω4. Therefore, by measuring the phase difference Δω through the opening and closing detection device, the opening and closing state of the display part 100 and the system part 200 and the opening and closing angle A can be detected.

[0092] Combination Figure 1 and 11As shown, in some embodiments, one side of the display part 100 and one side of the system part 200 are rotatably connected via a hinge 300; a first functional circuit board 4 is provided on the other side of the display part 100 away from the system part 200 or the hinge 300, and the NFC transmitting coil 1 is located on the first functional circuit board 4.

[0093] By integrating the NFC transmitting coil 1 on the first functional circuit board 4 of the laptop computer, it is helpful to reduce the difficulty of arranging and connecting the NFC transmitting coil 1 on the one hand, and it is helpful to improve the structural reuse rate of the circuit board on the other hand.

[0094] Combination Figure 1 and 11 As shown, in one embodiment, a second functional circuit board 5 is provided on the other side of the system part 200 away from the display part 100 , and the NFC receiving coil 2 is located on the second functional circuit board 5 .

[0095] By integrating the NFC receiving coil 2 on the second functional circuit board 5 of the laptop computer, it is helpful to reduce the difficulty of arranging and connecting the NFC receiving coil 2 on the one hand, and it is helpful to improve the structural reuse rate of the circuit board on the other hand.

[0096] Exemplarily, the first functional circuit board 4 may be any circuit board arranged on the display part 100, and the second functional circuit board 5 may be any circuit board arranged on the system part 200. It should be noted that the first functional circuit board 4 and the second functional circuit board 5 may also have functional circuits to realize other functions of the laptop computer, such as image acquisition, data processing, data transmission, etc.

[0097] In some possible implementations, the first functional circuit board 4 and the second functional circuit board 5 are respectively a printed circuit board (PCB), a flexible printed circuit board (FPC), a rigid-flexible board, and the like.

[0098] In some possible implementations, using an opening and closing detection device to detect the opening and closing status of the display part 100 and the system part 200 can assist in achieving precise control of functions such as starting up, shutting down, turning off the screen, turning on the screen, and initiating sleep of the laptop computer.

[0099] Combination Fig.12As shown, in some embodiments, the first functional circuit board 4 is further provided with a camera module 41, and the camera module 41 is arranged in parallel with the NFC transmitting coil 1 on the first functional circuit board 4. Through the above arrangement, the NFC transmitting coil 1 and the camera module 41 are simultaneously integrated on the first functional circuit board 4, thereby improving the reuse rate of the first functional circuit board 4. Exemplarily, the camera module 41 can realize functions such as image acquisition and video calling.

[0100] Optionally, the number of the NFC transmitting coils 1 is two or more, and the two or more are respectively arranged on the first functional circuit board 4 on both sides of the camera module 41 to fully utilize the board space of the first functional circuit board 4.

[0101] Combination Fig.11 As shown, in some embodiments, the second functional circuit board 5 is further provided with a touch module, the touch module includes a touch panel 51, and the NFC receiving coil 2 is located below the touch panel 51. Through the above arrangement, the NFC receiving coil 2 and the touch module are simultaneously integrated on the second functional circuit board 5, thereby improving the reuse rate of the second functional circuit board 5. Exemplarily, the touch module can realize functions such as human-computer interaction, information input, and mouse control. The NFC receiving coil 2 is arranged below the touch panel 51, making full use of the internal stacking space of the laptop computer without affecting the structure of the laptop computer.

[0102] Combination Fig.13 As shown, in some embodiments, the laptop computer further includes a data transmission circuit 6; the data transmission circuit 6 is electrically connected to the NFC transmitting coil 1 or the NFC receiving coil 2, and the data transmission circuit 6 performs wireless data transmission with an external device through the NFC transmitting coil 1 or the NFC receiving coil 2. Through the above arrangement, the laptop computer of this embodiment can reuse the NFC transmitting coil 1 or the NFC receiving coil 2 to realize the data transmission function, enrich the data transmission method of the laptop computer, and further improve the component reuse rate of the laptop computer. Among them, the external device can be any laptop computer with NFC function. Among them, the external device can be another laptop computer, or an electronic storage device.

[0103] Combination Fig.14As shown, in some embodiments, the laptop computer further includes a device lock circuit 7 and an NFC key coil (not shown in the figure); the device lock circuit 7 is electrically connected to the NFC transmitting coil 1 or the NFC receiving coil 2, and the device lock circuit 7 wirelessly communicates with the NFC key coil via the NFC transmitting coil 1 or the NFC receiving coil 2. Through the above arrangement, the laptop computer of this embodiment can reuse the NFC transmitting coil 1 or the NFC receiving coil 2 to implement the device lock function, thereby improving the security of the laptop computer and further improving the reuse rate of the components of the laptop computer. Among them, the NFC key coil can be a key card, or a simulated key recorded in a mobile terminal such as a mobile phone.

[0104] Combination Fig.15 As shown, in some embodiments, the laptop computer further includes a payment identification circuit 8; the payment identification circuit 8 is electrically connected to the NFC transmitting coil 1 or the NFC receiving coil 2, and the payment identification circuit 8 wirelessly communicates with the external payment device through the NFC transmitting coil 1 or the NFC receiving coil 2. Through the above arrangement, the laptop computer of this embodiment can reuse the NFC transmitting coil 1 or the NFC receiving coil 2 to realize the mobile payment function, thereby improving the convenience of using the laptop computer and further improving the reuse rate of the components of the laptop computer. Among them, the external payment device can be a mobile terminal such as a mobile phone.

[0105] In the description of this specification, the reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention.

[0106] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A notebook computer, characterized in that: include: A display part (100), comprising a first housing (1001) and a display screen (1002) embedded in the first housing (1001); The system part (200) comprises a second housing (2001) and a keyboard (2002), a mainboard, a central processing unit and a graphics card arranged in the second housing (2001); A rotating shaft (300) is respectively connected to the first housing (1001) and the second housing (2001), so that the display part (100) can rotate relative to the system part (200) to realize the opening and closing of the two. The laptop computer further comprises: an opening and closing detection device, the opening and closing detection device being used to detect the opening and closing status of the display part (100) and the system part (200), the opening and closing detection device comprising: an NFC transmitting coil (1), an NFC receiving coil (2) and a control circuit (3); The NFC transmitting coil (1) is arranged on the display part (100); The NFC receiving coil (2) is arranged in the system part (200); The control circuit (3) is arranged on the main board and is electrically connected to the NFC transmitting coil (1) and the NFC receiving coil (2) respectively to receive signals sent by the two respectively, and determines the opening and closing states of the display part (100) and the system part (200) according to the received signals.

2. The notebook computer according to claim 1, characterized in that: The rotating shaft (300) is located on one side of the display part (100), and the NFC transmitting coil (1) is arranged on the other side of the display part (100).

3. The notebook computer according to claim 2, characterized in that: A first functional circuit board (4) is provided on the other side of the display part (100), and the NFC transmitting coil (1) is located on the first functional circuit board (4).

4. The notebook computer according to claim 3, characterized in that: The first functional circuit board (4) is also provided with a camera module (41), and the camera module (41) and the NFC transmitting coil (1) are arranged in parallel on the first functional circuit board (4).

5. The notebook computer according to claim 1, characterized in that: The rotating shaft (300) is located on one side of the system part (200), and the NFC receiving coil (2) is arranged on the other side of the system part (200).

6. The notebook computer according to claim 5, characterized in that: A second functional circuit board (5) is provided on the other side of the system part (200), and the NFC receiving coil (2) is located on the second functional circuit board (5).

7. The notebook computer according to claim 6, characterized in that: The second functional circuit board (5) is further provided with a touch module, the touch module comprising a touch panel (51), and the NFC receiving coil (2) is located below the touch panel (51).

8. The laptop computer according to any one of claims 1 to 7, characterized in that: The NFC transmitting coil (1) is used to transmit a first signal to the NFC receiving coil (2), and input the first signal into the control circuit (3); The NFC receiving coil (2) is used to receive the first signal, generate a second signal according to the first signal and input the second signal into the control circuit (3), The control circuit (3) is used to determine a phase difference Δω between the first signal and the second signal, and to determine the open and closed states of the display part (100) and the system part when the phase difference Δω satisfies a first target range.

9. The notebook computer according to claim 8, characterized in that: The control circuit (3) comprises a phase difference measuring unit (31) and a comparison unit (32); the phase difference measuring unit (31) is electrically connected to the NFC transmitting coil (1) and the NFC receiving coil (2), respectively, receives the first signal and the second signal, and outputs a phase difference Δω between the first signal and the second signal; the comparison unit (32) is electrically connected to the phase difference measuring unit (31), receives the phase difference Δω, compares the phase difference Δω with a first target range, and determines that the display part (100) and the system part (200) are in a first open / closed state corresponding to the first target range when the phase difference Δω satisfies the first target range.

10. The laptop computer according to any one of claims 1 to 7, characterized in that: The laptop computer further comprises a data transmission circuit (6); The data transmission circuit (6) is electrically connected to at least one of the NFC transmitting coil (1) and the NFC receiving coil (2), and the data transmission circuit (6) performs wireless data transmission with an external device through the NFC transmitting coil (1) or the NFC receiving coil (2).

11. The laptop computer according to any one of claims 1 to 7, characterized in that: The laptop computer also includes a device lock circuit (7) and an NFC key coil; The device lock circuit (7) is electrically connected to at least one of the NFC transmitting coil (1) and the NFC receiving coil (2), and the device lock circuit (7) wirelessly communicates with the NFC key coil via the NFC transmitting coil (1) or the NFC receiving coil (2).

12. The laptop computer according to any one of claims 1 to 7, characterized in that: The laptop computer also includes a payment identification circuit (8); The payment identification circuit (8) is electrically connected to at least one of the NFC transmitting coil (1) and the NFC receiving coil (2), and the payment identification circuit (8) wirelessly communicates with an external payment device via the NFC transmitting coil (1) or the NFC receiving coil (2).

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