Electronic device, wireless keyboard, and system

Abstract

The present application relates to the technical field of wireless charging and the technical field of terminals. Disclosed are an electronic device, a wireless keyboard, and a system. The electronic device comprises a back enclosure, a first component, and a first coil, wherein the back enclosure comprises a first through hole, which is configured to arrange the first component; the projection of the first coil on a plane where the back enclosure is located falls within the region of the first through hole; and the first coil is configured to generate an alternating magnetic field. The solution reuses an opening region on the back enclosure reserved for the first component, so as to dispose the first coil, without the need for a separate opening in another part of the back enclosure, such that the electronic device has a wireless charging function and can also use a relatively integral metal back enclosure; and the metal back enclosure does not cause electromagnetic shielding to the first coil, thereby ensuring the efficiency of wireless charging and improving the strength of the back enclosure and aesthetic refinement. In addition, when the technical solution of the present application is used, the electronic device can also use a back enclosure made of a non-metallic material, thereby similarly improving the efficiency of wireless charging.

Description

An electronic device, a wireless keyboard and system Technical Field

[0001] This application relates to the field of wireless charging technology, and more particularly to an electronic device, a wireless keyboard, and a system. Background Technology

[0002] Tablet computers are more portable devices than laptops and desktop computers. As more and more users use tablets for work, the combination of tablets and wireless keyboards is becoming increasingly popular.

[0003] In a typical application scenario, a tablet and a wireless keyboard transmit data via Bluetooth, with the tablet wirelessly powering the keyboard. However, wireless charging, as an electromagnetic coupling energy transfer method, is sensitive to metals. Therefore, to ensure efficient wireless charging, the back cover of tablets is generally made of non-metallic materials such as glass, ceramic, or plastic. However, using non-metallic materials for the back cover results in lower strength and reduces the aesthetic appeal. Summary of the Invention

[0004] In view of this, this application provides an electronic device, a wireless keyboard, and a system that enable the electronic device to have wireless charging functionality while using a metal back cover, thereby improving the strength of the back cover and the refinement of the appearance of the electronic device.

[0005] In a first aspect, this application provides an electronic device comprising: a rear housing and a first coil. The metal rear housing includes a first through-hole for arranging a first component of the electronic device; the projection of the first coil onto the plane of the rear housing is located within the region of the first through-hole; the first coil is used to generate an alternating magnetic field.

[0006] The technical solution provided in this application reuses the opening area reserved on the back cover for the first device to house the first coil. The first device is one that needs to maintain an unobstructed transmission path with the outside world during operation; this transmission path can be an optical path. For example, if the first device needs to send light to the outside world or sense external light, a through-hole is required to prevent the metal back cover from obstructing the optical path of the first device during operation. By reusing the first through-hole, it is no longer necessary to create separate openings in other parts of the back cover to house the first coil. This allows the electronic device to have wireless charging functionality while using a relatively complete metal back cover, and the metal back cover does not form electromagnetic shielding for the first coil, ensuring the efficiency of wireless charging and improving the strength and aesthetics of the electronic device's back cover.

[0007] In addition, when adopting the technical solution of this application, the electronic device can also use a back cover made of non-metallic materials such as glass, ceramic, or plastic. In this case, since the projection of the first coil on the plane of the back cover is located in the area of ​​the first through hole, the back cover no longer blocks the transmitting coil. This can also improve the coupling efficiency between the first coil and the receiving coil on the wireless keyboard when the electronic device is charging the wireless keyboard, thereby improving the efficiency of wireless charging.

[0008] In one possible implementation, the electronic device is a tablet computer.

[0009] In one possible implementation, the first device is a flash unit of an electronic device, and the back cover of the electronic device needs to have a through hole reserved for the flash unit to avoid blocking the light emitted by the flash unit; or, the first device is a time-of-flight (TOF) sensor of an electronic device, and the back cover of the electronic device needs to have a through hole reserved for the TOF sensor to avoid blocking the light emitted by the TOF sensor and to avoid blocking the reflected light.

[0010] In one possible implementation, the first coil surrounds the first device.

[0011] In this implementation, the projection of the outermost coil of the first coil onto the plane of the rear shell can be close to the edge of the first through hole, thereby making the most of the area of ​​the first through hole.

[0012] In one possible implementation, the first via is also used to house a first camera module of the electronic device. In this implementation, the first coil may wrap around only the first device, or the first coil may wrap around both the first device and the first camera module.

[0013] In one possible implementation, the electronic device further includes a first shielding layer made of a metallic material; the first shielding layer is located below the first camera module.

[0014] When the alternating magnetic field generated by the first coil passes through the first camera module, it reaches the first shielding layer. When the alternating magnetic field acts on the first shielding layer, a circular alternating current is generated on the first shielding layer. The alternating electromagnetic field generated by the alternating current on the first shielding layer is always opposite in direction to the alternating magnetic field generated by the first coil. When the two electromagnetic fields with opposite directions act on the first camera module, they cancel each other out, which can significantly reduce the influence of the alternating magnetic field on the first camera module.

[0015] In one possible implementation, the first shielding layer is a metal material layer or a metal coil.

[0016] In one possible implementation, the electronic device further includes a third circuit board, with the first camera module disposed on a first surface of the third circuit board; and a first shielding layer disposed on a second surface of the third circuit board.

[0017] This implementation method is easy to implement and does not require major adjustments to the existing layout of the first camera module and circuit board.

[0018] In one possible implementation, the rear cover also includes a second through-hole for locating a second camera module of the electronic device.

[0019] In one possible implementation, the electronic device further includes a second shielding layer made of a metallic material; the second shielding layer is located below the second camera module.

[0020] When the alternating magnetic field generated by the first coil passes through the second camera module, it reaches the second shielding layer. When the alternating magnetic field acts on the second shielding layer, a circular alternating current is generated on the second shielding layer. The alternating electromagnetic field generated by the alternating current on the second shielding layer is always opposite in direction to the alternating magnetic field generated by the first coil. When the two electromagnetic fields with opposite directions act on the second camera module, they cancel each other out, which can significantly reduce the influence of the alternating magnetic field on the second camera module.

[0021] In one possible implementation, the second shielding layer is a metal material layer or a metal coil.

[0022] In one possible implementation, the electronic device further includes a fourth circuit board, with the second camera module disposed on a first surface of the fourth circuit board; a second shielding layer is disposed on a second surface of the fourth circuit board. This implementation is easy to implement and does not require significant adjustments to the existing layout of the second camera module and circuit board.

[0023] In one possible implementation, the first end and the second end of the metal coil are connected. In this case, the metal coil can form a closed loop current under the action of an alternating magnetic field, thereby improving the anti-interference effect.

[0024] In one possible implementation, the electronic device further includes a first circuit board and a second circuit board; a first coil is disposed on a first surface of the first circuit board; a first device is disposed on the second circuit board; the first circuit board is located between the second circuit board and the rear housing; and the first surface of the first circuit board is fixed to the rear housing.

[0025] In this implementation, since the first circuit board carrying the first coil is directly fixed to the back cover, the transmitting coil can be closer to the outer surface of the back cover in a direction perpendicular to the plane of the back cover. The outer surface of the back cover is the surface that fits against the wireless keyboard's support after the wireless keyboard is closed. Therefore, when the wireless keyboard is closed, the wireless keyboard's support fits against the back cover. This implementation allows the distance between the first coil 1 and the second coil on the wireless keyboard in a direction perpendicular to the plane of the back cover to be closer, thereby improving the efficiency of wireless charging.

[0026] In one possible implementation, the electronic device further includes a first circuit board, a second circuit board, and a limiting member; a first coil is disposed on a first surface of the first circuit board; a first device is disposed on the second circuit board; the first circuit board is located between the second circuit board and the rear housing; the first surface of the first circuit board is fixed to the limiting member; the limiting member is used to prevent the first coil from detaching from the first through hole after assembly with the rear housing.

[0027] In this implementation, by setting a limiting component, the relative position of the first coil can be kept unchanged without etching the first coil onto the first circuit board, which reduces the processing difficulty while ensuring the efficiency of wireless charging.

[0028] In one possible implementation, the electronic device further includes a first circuit board, a second circuit board, a first soft magnetic material layer, and a limiting component; a first coil is disposed on a first surface of the first soft magnetic material layer; a second surface of the first soft magnetic material layer is fixed to a first surface of the first circuit board; a first device is disposed on the second circuit board; the first circuit board is located between the second circuit board and the rear cover; a first surface of the first circuit board is fixed to the limiting component; the limiting component is used to prevent the first coil from detaching from the first through hole after assembly with the rear cover.

[0029] In this implementation, the coupling efficiency between the first coil and the second coil on the wireless keyboard is improved by using the first soft magnetic material layer. By setting a limiting component, the relative position of the first coil and the back cover can be kept unchanged, thus ensuring the efficiency of wireless charging.

[0030] In one possible implementation, the first coil stops working when any of the rear camera modules of the electronic device are in operation, and the rear camera modules are arranged in a reserved through hole in the rear shell.

[0031] In this implementation, when the first coil for charging the wireless keyboard is in operation, the processor of the electronic device can control the first coil to pause operation when the rear camera is enabled. This prevents the rear camera module from experiencing abnormal screen previews due to interference from alternating magnetic fields, thus ensuring a better user experience.

[0032] In one possible implementation, the electronic device further includes a processor; the processor is used to obtain the identifier of the currently activated camera module, and when it is determined from the identifier that the currently activated camera module is a rear camera module, it controls the first coil to stop working.

[0033] In one possible implementation, the back cover is a metal back cover. Using a metal back cover in electronic devices can improve the strength of the back cover and the refinement of the appearance, and the metal back cover will not form electromagnetic shielding for the first coil, thus ensuring the efficiency of wireless charging.

[0034] In one possible implementation, the first soft magnetic material layer can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrites. This can better guide magnetic field lines, form a loop, improve the coupling coefficient between the first coil and the second coil, thereby improving the efficiency of wireless charging. At the same time, it can also reduce the impact of electromagnetic waves generated by the first coil on other devices.

[0035] Secondly, this application also provides a wireless keyboard, which includes: a second coil, a keyboard body, and a support structure. The support structure fits against the back cover of an electronic device when the wireless keyboard is closed; the support structure includes a third through-hole, which is used to prevent the support structure from obstructing a first component of the electronic device when it fits against the back cover; the second coil surrounds the third through-hole; the second coil is used to generate an alternating current using an alternating magnetic field.

[0036] When the wireless keyboard is attached to the back cover of the electronic device, the first coil can be aligned with the second coil. At this time, the second coil can generate alternating current using the electromagnetic waves emitted by the first coil, thereby realizing wireless charging.

[0037] In one possible implementation, the first device is a flash of an electronic device; or, the first device is a time-of-flight (TOF) sensor of an electronic device.

[0038] In one possible implementation, the third through-hole is also used to prevent the bracket structure from obstructing the first camera module of the electronic device when the bracket structure is attached to the back cover of the electronic device. In this implementation, the electronic device can house the first device and the first camera module within the first through-hole.

[0039] In one possible implementation, the bracket structure further includes a fourth through-hole, which is used to prevent the bracket structure from obstructing the first camera module of the electronic device when it is fitted to the back cover of the electronic device. In this implementation, the adapted electronic device may include multiple camera modules, such as a main camera module and a telephoto lens camera module, with different camera modules housed in different reserved through-holes.

[0040] In one possible implementation, the bracket structure also includes a fifth through hole, which is used to prevent the bracket structure from obstructing the second camera module of the electronic device when the bracket structure is attached to the back cover of the electronic device.

[0041] In one possible implementation, the wireless keyboard further includes: a second soft magnetic material layer; a second coil disposed on the second soft magnetic material layer, and when the bracket structure is attached to the back cover of the electronic device, the second coil is located between the back cover of the electronic device and the second soft magnetic material layer.

[0042] In this implementation, the coupling efficiency between the first coil and the second coil on the wireless keyboard is improved by using a second soft magnetic material layer, thereby improving the efficiency of wireless charging.

[0043] In one possible implementation, the second soft magnetic material layer can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrites. This can better guide magnetic field lines, form a circuit, improve the coupling coefficient between the first coil and the second coil, and thus improve the efficiency of wireless charging.

[0044] Thirdly, this application also provides a wireless charging system, including the electronic device provided by the first aspect and any implementation thereof, and the wireless keyboard provided by the second aspect and any implementation thereof. When the back cover of the electronic device is attached to the support structure of the wireless keyboard, the electronic device wirelessly charges the wireless keyboard.

[0045] In one possible implementation, when the electronic device wirelessly charges the wireless keyboard, the first coil and the second coil are aligned. Specifically, alignment of the first and second coils means that their projections on the plane of the back cover coincide, and the plane containing the first coil is parallel to the plane containing the second coil, to ensure high wireless charging efficiency. Attached Figure Description

[0046] Figure 1 is a schematic diagram of a scenario where the electronic device and wireless keyboard provided in this application are used in combination.

[0047] Figure 2 is a schematic diagram of a scenario where the electronic device and wireless keyboard provided in this application are used in combination.

[0048] Figure 3 is a schematic diagram of the circuit structure provided in this application;

[0049] Figure 4A is a schematic diagram of an electronic device provided in an embodiment of this application;

[0050] Figure 4B is an exploded view of the electronic device corresponding to Figure 4A provided in the embodiment of this application;

[0051] Figure 4C is a second exploded view of the electronic device corresponding to Figure 4A provided in the embodiments of this application;

[0052] Figure 4D is an exploded view of the electronic device corresponding to Figure 4A provided in the embodiment of this application;

[0053] Figure 5 is a schematic diagram of a wireless keyboard provided in an embodiment of this application;

[0054] Figure 6 is a schematic diagram of the alignment of the transmitting coil and the receiving coil provided in an embodiment of this application;

[0055] Figure 7 is a second schematic diagram showing the alignment of the transmitting coil and receiving coil according to an embodiment of this application.

[0056] Figure 8 is a schematic diagram of the principle provided in an embodiment of this application;

[0057] Figure 9 is a schematic diagram of the principle provided in the embodiment of this application;

[0058] Figure 10 is a schematic diagram of a camera module provided in an embodiment of this application;

[0059] Figure 11 is a schematic diagram of a simulation model of an electronic device provided in an embodiment of this application;

[0060] Figure 12 is a schematic diagram of another electronic device provided in an embodiment of this application;

[0061] Figure 13 is a side view of an embodiment of this application;

[0062] Figure 14 is a schematic diagram of another wireless keyboard provided in an embodiment of this application;

[0063] Figure 15 is a schematic diagram of another electronic device provided in an embodiment of this application;

[0064] Figure 16 is a second side view provided in an embodiment of this application;

[0065] Figure 17 is a partial schematic diagram of the wireless keyboard provided in an embodiment of this application;

[0066] Figure 18 is a schematic diagram of another electronic device provided in an embodiment of this application;

[0067] Figure 19 is a side view three provided in an embodiment of this application;

[0068] Figure 20 is a partial schematic diagram of the wireless keyboard provided in an embodiment of this application;

[0069] Figure 21 is a schematic diagram of another electronic device provided in an embodiment of this application;

[0070] Figure 22 is a side view four provided in an embodiment of this application;

[0071] Figure 23 is a partial schematic diagram of the wireless keyboard provided in an embodiment of this application;

[0072] Figure 24 is a flowchart of a wireless charging control method provided in an embodiment of this application;

[0073] Figure 25 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0074] Figure 26 is a schematic diagram of the structure of a wireless keyboard provided in an embodiment of this application. Detailed Implementation

[0075] To enable those skilled in the art to better understand the solution of this application, the application scenario of the technical solution of this application will be described first. In the following description and accompanying drawings, a tablet computer will be used as an example for illustration.

[0076] Please refer to Figures 1 to 3. Figure 1 is a schematic diagram of a scenario in which the electronic device and wireless keyboard provided in this application are used in combination; Figure 2 is a schematic diagram of a scenario in which the electronic device and wireless keyboard provided in this application are used in combination; and Figure 3 is a schematic diagram of the circuit structure provided in this application.

[0077] The combination of tablet 10 and wireless keyboard 20 can meet the user's light office needs. As shown in Figure 1, when the wireless keyboard 20 is in the unfolded state, data transmission between tablet 10 and wireless keyboard 20 is achieved via Bluetooth, allowing users to conveniently input data using the wireless keyboard 20.

[0078] As shown in Figure 2, when the wireless keyboard 20 is in the closed state, the wireless keyboard 20 is attached to the back shell of the electronic device.

[0079] In existing solutions, the tablet computer 10 transmits power to the wireless keyboard 20 via wireless power supply. The transmitting coil 103 on the tablet computer is generally located in the middle of the back cover of the electronic device, and the receiving coil 203 of the wireless keyboard 20 is aligned with the transmitting coil 103.

[0080] The receiving coil 203 is generally located inside the bracket 22 of the wireless keyboard 20. It is generally not visible from the user's perspective through the surface of the bracket 22. That is, the position of the receiving coil 203 shown in Figure 2 is only for illustrative purposes.

[0081] The specific circuit structure is explained below with reference to Figure 3.

[0082] The tablet computer 10 generally includes a first battery 130, a first charging control module 12, a charging interface 13, an inverter circuit 14, and a transmitting coil 103. The wireless keyboard 20 specifically includes a second battery 21, a second charging control module 24, a rectifier circuit 23, and a receiving coil 203.

[0083] Currently, when the tablet computer 10 transmits power to the wireless keyboard 20 wirelessly, the first charging control module 12 on the tablet computer 10 controls the first battery 130 to output DC power, and the inverter circuit 14 converts the DC power into AC power and transmits it to the transmitting coil 103. The transmitting coil 103 uses the AC power to generate an alternating magnetic field and transmits it outward.

[0084] The receiving coil 203 on the wireless keyboard 20 is close to and aligned with the transmitting coil 103. When the transmitting coil 103 starts to generate an alternating magnetic field, the receiving coil 203 uses the alternating magnetic field to generate alternating current. After the alternating current is rectified into direct current by the rectifier circuit 23, it charges the second battery 21 on the wireless keyboard 20 through the second charging control module 24.

[0085] In some other possible implementations, the tablet computer 10 may include a charging port 13, which may be an interface conforming to the Universal Serial Bus (USB) standard specification, specifically a Mini USB interface, a Micro USB interface, a USB Type C interface, etc.

[0086] The tablet computer 10 can receive charging input from a wired charger through the charging port 13. While charging the first battery 130, it can also wirelessly charge the wireless keyboard 20 through the inverter circuit 14 and the transmitting coil 103.

[0087] Because metal has excellent electromagnetic shielding properties, if the back cover of the tablet 10 were made of metal, the energy emitted by the transmitting coil 103 would be converted into heat and dissipated by the metal casing, compromising the efficiency of wireless charging. Therefore, the back cover of the tablet 10 is currently generally made of non-metallic materials such as glass, ceramic, or plastic.

[0088] However, using a metal back cover can significantly improve the strength and refinement of the tablet 10's back cover. To resolve the conflict between a metal back cover and wireless charging functionality, this application provides an electronic device, a wireless keyboard, and a wireless transmission system. By placing the wireless charging transmitting coil in the area where the back cover already has an opening, it is no longer necessary to make separate openings in other parts of the back cover to house the transmitting coil. This allows the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength of the back cover and the refinement of its appearance. It is understood that when using the technical solution of this application, the electronic device can also use non-metallic materials such as glass, ceramic, and plastic.

[0089] The electronic devices and wireless keyboards shown in the accompanying drawings are merely examples and do not constitute a limitation on the technical solutions of this application. In practical applications, the electronic devices and wireless keyboards can adopt other designs and product forms. To enable those skilled in the art to more clearly understand the technical solutions of this application, the implementation of the solutions in this application is described in detail below with reference to the accompanying drawings.

[0090] It is understood that the directional names such as "up", "down", "left", and "right" in the following embodiments of this application are only for illustrative purposes and should be referred to the directions in the accompanying drawings. They do not constitute a limitation on the technical solution of this application.

[0091] The terms "first" and "second" used in this application description are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0092] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0093] In the following scenarios of this application, a first coil on an electronic device is used as a transmitting coil for charging a wireless keyboard, and a second coil on the wireless keyboard is used as a receiving coil.

[0094] Understandably, in other scenarios, the first coil on an electronic device can also be used as a receiving coil so that the electronic device can be wirelessly charged by an external wireless charging device.

[0095] Referring to Figure 4A, this figure is a schematic diagram of an electronic device provided in an embodiment of this application.

[0096] The electronic device 10 includes a rear shell 11 and a first coil 103. In this embodiment, the specific material used for the rear shell 11 is not limited; for example, it can be a metallic material such as aluminum alloy or titanium alloy, or a non-metallic material such as glass, ceramic, or plastic.

[0097] The rear cover 11 includes a first through hole 101, which is a reserved through hole for laying out a first device 12 of an electronic device. The projection of the first coil 103 on the plane of the rear cover 11 is located in the area where the first through hole 101 is located.

[0098] The first coil 103 is used to generate an alternating magnetic field. In some embodiments, the electronic device is provided with a first device 12, which is a device that needs to maintain an unobstructed transmission path with the outside world during operation, and the transmission path can be an optical path.

[0099] For example, the first device 12 is a device that needs to emit and / or receive light when working. In the embodiments of this application, the specific type of the first device 12 is not limited. For example, the first device 12 can be a flash, a time of flight (TOF) sensor, or a camera module, etc.

[0100] In order to set up the first device 12, the electronic device 10 needs to open a hole in the rear shell 11 to avoid the rear shell from blocking the first device 12. That is, the first through hole 101 is a through hole reserved for setting up the first device 12, not a through hole specifically opened for setting up the first coil 103. This avoids reducing the integrity and strength of the rear shell structure due to the additional opening in the rear shell 11.

[0101] In one possible implementation, the first device 12 is a flash. When the electronic device is shooting in a dark environment, the flash can be used to improve the lighting conditions. Therefore, the back cover 11 needs to have a through hole for the flash in order to avoid blocking the light emitted by the flash.

[0102] In another possible implementation, the first device 12 is a Time-of-Flight (TOF) sensor. A TOF sensor emits light and locates an object by measuring the time it takes for the light to reflect off it. Therefore, the back cover 11 needs to have a through-hole for the TOF sensor to avoid blocking the light emitted by the sensor and to prevent blocking the reflected light.

[0103] In another possible implementation, the first device 12 is a camera module on an electronic device. The camera module can be used to capture images or videos, so the back cover 11 needs to have a through hole for the camera module so that external light can enter the lens of the camera module.

[0104] In addition to the examples above, the first device can also be other devices, which will not be described in detail in the embodiments of this application.

[0105] It is understandable that the back cover 11 of the electronic device may have multiple through holes pre-set. For example, in addition to the first through hole 101, a second through hole is also provided. The first through hole 101 and the second through hole 104 are through holes reserved for the layout of the same or different devices.

[0106] For example, the first through hole 101 is a through hole reserved for arranging the flash, and the second through hole 104 is a through hole reserved for arranging the camera module.

[0107] For example, the first through hole 101 and the second through hole 104 are both through holes reserved for the layout of the camera module, and the camera lenses of the two camera modules have different functions, such as the lens of one camera module being the main camera lens and the lens of the other camera module being the telephoto lens.

[0108] In Figure 4A, taking the first device 12 as an example of a TOF sensor or a flash, the second through hole 104 is a through hole reserved for setting up the camera module 105. The setting method of the first coil 103 will be explained in detail below with reference to the attached figure.

[0109] See Figure 4B, which is an exploded view of the electronic device corresponding to Figure 4A provided in the embodiments of this application.

[0110] The electronic device shown in Figure 4B includes: a back cover 11, a first device 12, a circuit board 41, a circuit board 51, a circuit board 107, a first coil 103, and a camera module 105.

[0111] The first coil 103 is disposed on the first surface of the circuit board 41. In one possible implementation, the first coil 103 can be glued to the circuit board 41. In another possible implementation, the first coil 103 can be directly etched onto the circuit board 41, thus preventing accidental separation of the first coil 103 from the circuit board 41.

[0112] The first device 12 is disposed on the circuit board 51. In one possible implementation, the circuit board 51 is a printed circuit board (PCB).

[0113] The circuit board 41 is located between the circuit board 51 and the back cover 11 in the Z direction. The circuit board 41 has a corresponding opening area reserved based on the position of the first device 12 to avoid the circuit board 41 blocking the first device 12.

[0114] The first surface of the circuit board 41 is fixed to the rear shell 11. Because the first coil 103 is fixed to the circuit board 41, this also achieves the fixation of the relative position of the first coil 103 and the rear shell 11. The first surface of the circuit board 41 and the rear shell 11 can be fixed together by glue or limiting components.

[0115] In one possible implementation, the circuit board 41 is a flexible printed circuit (FPC). A lightweight flexible circuit board with a certain degree of deformation capability is selected so that the fixed circuit board 41 is not easy to detach from the back cover 11. This avoids the first coil 103 from being displaced along with the circuit board 41 after the circuit board 41 detaches from the back cover 11, which would cause the first coil and the second coil to no longer be aligned, resulting in a decrease in wireless charging efficiency.

[0116] Taking the first device 12 as an example, when the first device 12 is working, the emitted light starts from the first device 12, passes through the opening area of ​​the circuit board 41, the area surrounded by the first coil 103, and the first through hole 101.

[0117] The camera module 105 is mounted on the circuit board 107. When the electronic device is assembled, the camera module 105 can partially pass through the second supply 104 in the Z direction.

[0118] In this implementation, since the circuit board 41 carrying the first coil 103 is directly fixed to the back cover 11, the transmitting coil 103 can be closer to the outer surface of the back cover 11 in the Z direction. The outer surface of the back cover 11 is the surface that fits against the wireless keyboard's support after the wireless keyboard is closed. Therefore, when the wireless keyboard is closed, the wireless keyboard's support fits against the back cover 11. This implementation allows the distance between the first coil 103 and the second coil on the wireless keyboard in the Z direction to be closer, thereby improving the efficiency of wireless charging.

[0119] The following describes another possible implementation of the first coil.

[0120] See Figure 4C, which is an exploded view of the electronic device corresponding to Figure 4A provided in the embodiments of this application.

[0121] The electronic device shown in Figure 4C includes: a back cover 11, a first device 12, a circuit board 41, a circuit board 51, a circuit board 107, a first coil 103, a camera module 105, a first limiting component 31A, a second limiting component 31B, a first blocking component 32A, and a second blocking component 32B.

[0122] The first coil 103 is disposed on the first surface of the circuit board 41. In one possible implementation, the first coil 103 can be glued to the circuit board 41.

[0123] The first device 12 is disposed on the circuit board 51.

[0124] The circuit board 41 is located between the circuit board 51 and the back cover 11 in the Z direction. The circuit board 41 has a corresponding opening area reserved based on the position of the first device 12 to avoid the circuit board 41 blocking the first device 12.

[0125] The first surface of the circuit board 41 is positioned relative to the first limiting member 31A. Because the first coil 103 is fixed to the circuit board 41, this also achieves the fixation of the relative position between the first coil 103 and the first limiting member 31A. At this time, the first coil 103 is located between the first limiting member 31A and the first surface of the circuit board 41.

[0126] The first limiting component 31A has a pre-reserved opening area based on the position of the first device 12 to prevent the first limiting component 31A from obstructing the first device 12. The opening area on the first limiting component 31A is smaller than the area surrounded by the innermost coil of the first coil 103, meaning that the first coil 103 can surround the opening area on the first limiting component 31A. The first limiting component 31A is made of a non-metallic material, such as glass or plastic, to avoid forming electromagnetic shielding on the first coil 103.

[0127] In one possible implementation, the circuit board 41 is a flexible printed circuit (FPC). By selecting a lightweight flexible circuit board with a certain degree of deformation capability, the fixed circuit board 41 is less likely to loosen or detach from the first limiting component 31A. This avoids the first coil 103 from shifting along with the circuit board 41 after the circuit board 41 becomes loose or detached from the first limiting component 31A, which would cause the first coil and the second coil to become misaligned and reduce the wireless charging efficiency.

[0128] The first limiting component 31A can be a separately set component, or it can reuse the decorative part of the electronic device.

[0129] Since the first device 103 has height in the Z direction, the first device 103 can partially pass through the opening area on the circuit board 41.

[0130] The area occupied by the first limiting member 31A matches the area of ​​the first through hole 101. In some possible implementations, after the first limiting member 31A is combined with the rear shell 11, the first limiting member 31A and the rear shell 11 can be relatively fixed, and can pass through the first through hole 101 in the Z direction, either wholly or partially. At this time, an observable protrusion is formed on the electronic device.

[0131] A first shielding member 32A can be attached and fixed to the outermost side of the first limiting component 31A in the Z direction. The first shielding member 32A can be made of glass or plastic. The first shielding member 32A has a corresponding non-perforated transparent area reserved based on the position of the first device 12. The first shielding member 32A is used to protect the first limiting component 31A and the first device 12, and also has a certain dustproof and waterproof function. The first limiting component 31A can prevent the first coil 103 from detaching from the first through hole 101.

[0132] The camera module 105 can be mounted on the circuit board 107. The circuit board 107 and the circuit board 51 can be the same circuit board or two separate circuit boards.

[0133] The second limiting component 31B is generally made of non-metallic materials, such as glass or plastic. The second limiting component 31B has a corresponding opening area reserved based on the position of the camera module 105 to avoid obstructing the camera module 105.

[0134] The second limiting component 31B and the first limiting component 31A can be made as a single unit or as two independent limiting components. The second limiting component 31B can be a separately set component or can reuse a decorative part of the camera module. The opening area on the second limiting component 31B matches the area of ​​the camera module 105. In some possible implementations, after the second limiting component 31B is combined with the camera module 105, the second limiting component 31B and the rear shell 11 can be relatively fixed, and the camera module 105 can pass through the opening area of ​​the second limiting component 31B in the Z direction, either entirely or partially.

[0135] The second shield 32B is located on the outermost side of the L2 axis in the Z direction, that is, the camera module 105 is located between the circuit board 107 and the second shield 32B. The second shield 32B can be made of glass or plastic. The first shield 32A reserves a corresponding non-opening transparent area based on the position of the camera module 105. The second shield 32B is used to protect the lens on the camera module 105 and also has a certain dustproof and waterproof function.

[0136] The technical solution of this application embodiment, by setting the first limiting component 31A, can ensure that the relative position of the first coil 103 remains unchanged without etching the first coil 103 on the circuit board 41, thereby reducing the processing difficulty and ensuring the efficiency of wireless charging.

[0137] The following describes another configuration of the first coil.

[0138] See Figure 4D, which is an exploded view of the electronic device corresponding to Figure 4A provided in the embodiments of this application.

[0139] The electronic device shown in Figure 4D includes: a back cover 11, a first device 12, a circuit board 41, a circuit board 51, a circuit board 107, a first coil 103, a first limiting component 31A, a second limiting component 31B, a camera module 105, a first shielding component 32A, and a second shielding component 32B.

[0140] The first device 12 can be disposed on the circuit board 51. In one possible implementation, the circuit board 51 is a printed circuit board (PCB).

[0141] The first coil 103 can be disposed on the circuit board 41. The circuit board 41 has a corresponding opening area reserved based on the position of the first device 12 to avoid the circuit board 41 obstructing the first device 12.

[0142] In one possible implementation, the first coil 103 is attached to the circuit board 41 with adhesive. In another possible implementation, the first coil 103 is attached to the first soft magnetic material layer 15 with adhesive, and the first soft magnetic material layer 15 is attached to the circuit board 41 with adhesive.

[0143] The first soft magnetic material layer 15 can improve the coupling coefficient between the first coil 103 and the second coil, thereby improving the efficiency of wireless charging. It can also reduce the impact of electromagnetic waves generated by the transmitting coil on other devices. The first soft magnetic material layer 15 can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite. Furthermore, a combination of these materials can also be used.

[0144] The first soft magnetic material layer 15 has a corresponding opening area reserved based on the position of the first device 12, so as to avoid the first soft magnetic material layer 15 from blocking the first device 12.

[0145] In one possible implementation, the circuit board 41 is a flexible printed circuit (FPC). The circuit board 41 needs to be fixed to the first limiting member 31A, for example, by adhesive or the limiting member itself. This embodiment does not specify a particular method. This fixes the first coil 103 located between the circuit board 41 and the first limiting member 31A. Therefore, a lightweight flexible circuit board with a certain degree of deformation capability is selected, making it less likely for the fixed circuit board 41 to loosen or detach from the first limiting member 31A. This avoids the first coil 103 from shifting along with the circuit board 41 if the circuit board 41 loosens or detaches from the first limiting member 31A, which would cause the first coil and the second coil to misalign and reduce the wireless charging efficiency.

[0146] The first limiting component 31A can be a separate component or a reused decorative element of an electronic device. The first limiting component 31A has a corresponding opening area reserved based on the position of the first device 12 to avoid the first limiting component 31A obstructing the first device 12.

[0147] The opening area on the first limiting member 31A is smaller than the area surrounded by the innermost coil of the first coil 103, meaning that the first coil 103 can surround the opening area on the first limiting member 31A. The first limiting member 31A is made of non-metallic materials, such as glass or plastic, to avoid forming electromagnetic shielding on the first coil 103.

[0148] Since the first device 103 has height in the Z direction, the first device 103 can partially pass through the opening area on the circuit board 41.

[0149] The area occupied by the first limiting member 31A matches the area of ​​the first through hole 101. In some possible implementations, after the first limiting member 31A is combined with the rear shell 11, the first limiting member 31A and the rear shell 11 can be relatively fixed, and can pass through the first through hole 101 in the Z direction, either wholly or partially. At this time, an observable protrusion is formed on the electronic device.

[0150] A first shielding member 32A can be attached and fixed to the outermost side of the first limiting component 31A in the Z direction. The first shielding member 32A can be made of glass or plastic. The first shielding member 32A has a corresponding non-perforated transparent area reserved based on the position of the first device 12. The first shielding member 32A is used to protect the first limiting component 31A and the first device 12, and also has a certain dustproof and waterproof function. The first limiting component 31A can prevent the first coil 103 from detaching from the first through hole 101.

[0151] Taking the first device 12 as an example, when the first device 12 is working, the propagation path of the emitted light can be referenced to axis L1. Starting from the first device 12, the light passes through the opening area of ​​the circuit board 41, the opening area of ​​the first soft magnetic material layer 15, the area surrounded by the first coil 103, the opening area of ​​the first limiting component 31A, and the transparent area of ​​the first shielding component 32A before reaching the outside.

[0152] The camera module 105 can be mounted on the circuit board 107. The circuit board 107 and the circuit board 51 can be the same circuit board or two separate circuit boards.

[0153] The second limiting component 31B is generally made of non-metallic materials, such as glass or plastic. The second limiting component 31B has a corresponding opening area reserved based on the position of the camera module 105 to avoid obstructing the camera module 105.

[0154] The second limiting component 31B and the first limiting component 31A can be made as a single unit or as two separate limiting components. The second limiting component 31B can be a separately set component or can reuse a decorative part of the camera module. The opening area on the second limiting component 31B matches the area of ​​the camera module 105.

[0155] In some possible implementations, after the second limiting component 31B is combined with the camera module 105, the second limiting component 31B and the rear shell 11 can be relatively fixed, and the camera module 105 can pass through the opening area of ​​the second limiting component 31B in the Z direction, either entirely or partially.

[0156] The area of ​​the second limiting member 31B matches the area of ​​the second through hole 104. In some possible implementations, after the second limiting member 31B is combined with the rear shell 11, it can pass through the second through hole 104 in the Z direction, either entirely or partially. At this time, an observable protrusion is formed at the camera module on the electronic device.

[0157] The second limiting component 31B may also have a second shielding component 32B attached and fixed to its outermost side in the Z direction. The second shielding component 32B may be made of glass or plastic. The second shielding component 32B has a corresponding non-perforated transparent area reserved based on the position of the camera module 105. The second shielding component 32B is used to protect the second limiting component 31B and the lens of the camera module 105, and also has dustproof and waterproof functions.

[0158] In the Z direction, the plane where the first coil 103 is located may be coplanar or non-coplanar with the plane where the rear shell 11 is located, depending on the thickness of the electronic device in the Z direction and the industrial design adopted by the electronic device. This application embodiment does not make specific limitations.

[0159] The specific structures of the first limiting component 31A and the second limiting component 31B in the figure are for illustrative purposes only and do not constitute a limitation on the technical solution of this application.

[0160] In this implementation, the coupling efficiency between the first coil 103 and the second coil on the wireless keyboard is improved by the first soft magnetic material layer 15. By setting the first limiting component 31A, the relative position of the first coil 103 and the back shell can be kept unchanged, thus ensuring the efficiency of wireless charging.

[0161] The projection of the first coil 103 onto the plane of the rear housing 11 is located within the area of ​​the first through hole 101. The projection of the outermost turn of the first coil 103 onto the plane of the rear housing 11 can be as close as possible to the edge of the first through hole 101 to increase the coupling area of ​​the first coil 103 and improve the wireless charging efficiency of the first coil 103. The first coil 103 includes a multi-turn coil, and the specific number of turns of the first coil 103 is not limited in this embodiment.

[0162] Please also refer to Figure 5, which is a schematic diagram of a wireless keyboard provided in an embodiment of this application.

[0163] The illustrated wireless keyboard 20 includes a second coil 203, a keyboard body 21, and a stand 22. The wireless keyboard 20 may also include a connector 23. The stand 22 is used to hold the electronic device 10. The keyboard body 21 may be equipped with buttons, a touchpad, etc., for user operation.

[0164] When using the wireless keyboard 20, the stand 22 and keyboard body 21 of the wireless keyboard 20 need to be opened. When the wireless keyboard 20 is not in use, the stand 22 and keyboard body 21 of the wireless keyboard 20 can be closed. The stand structure fits against the back shell of the electronic device when the wireless keyboard 20 is placed on it and closed.

[0165] In one embodiment, the support 22 of the wireless keyboard 20 and the keyboard body 21 are rotatably connected via a connecting part 23. In the example of FIG5, the connecting part 23 can be a pivot or a hinge; or, in other examples, the connecting part 23 can be a flexible material that can be bent (e.g., leather or cloth); or, in yet another example, the support 22 and the keyboard body 21 can be integrally formed, and the connection between the support 22 and the keyboard body 21 is thinned to allow the connection to be bent.

[0166] In one embodiment, the bracket 22 may include at least two rotatably connected brackets. For example, referring to FIG5, the bracket 22 includes a first bracket 221 and a second bracket 222, which are rotatably connected. In use, the first bracket 221 and the second bracket 222 can be used together to support the electronic device 10 (e.g., FIG1).

[0167] The bracket 22 includes a third through hole 201, which is used to prevent the bracket structure from obstructing the first component of the electronic device.

[0168] The second coil 203 is arranged around the third through hole 201, and the second coil 203 is used to generate alternating current using an alternating magnetic field.

[0169] To avoid scratching the back cover of the electronic device and to reduce weight and improve portability, the bracket structure is generally made of non-metallic materials. The second coil 203 is generally located inside the bracket 22. From the user's perspective, the second coil 203 is generally not visible through the surface of the bracket 22; that is, the position of the second coil 203 shown in Figure 5 is only for illustrative purposes.

[0170] Comparing Figures 5 and 4A, the area of ​​the third through-hole 201 surrounding the second coil 203 is smaller than the area of ​​the first through-hole 101 in Figure 4A. In Figure 4A, the projection of the first coil 103 onto the plane of the back cover 11 lies within the first through-hole 101 to prevent the metal back cover 11 from obscuring the first coil 103. Therefore, the area of ​​the outermost coil of the first coil 103 is generally smaller than the area of ​​the first through-hole 101. In this application, to align the first coil 103 with the second coil 203, the opening area of ​​the third through-hole 201 is correspondingly reduced. This allows the second coil 203, positioned within the second bracket 222, to align with the first coil 103 after the metal back cover 11 is attached to the second bracket 222, thereby improving wireless charging efficiency. The following is a detailed explanation with reference to the accompanying drawings.

[0171] Referring to Figure 6, this figure is a schematic diagram of the alignment of the transmitting coil and the second coil according to an embodiment of this application.

[0172] The diagram only shows the outermost turns of the first coil 103 and the second coil 203.

[0173] Taking the first through hole 101 and the third through hole 201 as circular and their centers aligned, the radius of the first through hole 101 is r1, and the radius of the outermost coil of the first coil 103 is r2, so r1 is greater than r2. The radius of the third through hole 201 is R2, and the radius of the outermost coil of the second coil 203 is R1, so R1 is greater than R2.

[0174] Furthermore, R2 should be less than r1, and R1 and r2 should be kept as equal as possible to ensure that the second coil 203 and the first coil 103 are aligned, thereby improving wireless charging efficiency. It should be noted that the radius R2 of the third through-hole 201 should not be set too small; it should at least meet the light transmission requirements of the first device 12.

[0175] It is understandable that when the first through hole 101 and the third through hole 201 are not circular, such as rectangular, elliptical, or regular polygon (with more than 4 sides), and / or when the first coil 103 and the second coil 203 are not circular, such as rectangular, elliptical, or racetrack-shaped (the four corners of the rectangle are rounded with arcs rather than right angles), they also have a similar scale relationship as in Figure 6, which will not be elaborated here.

[0176] In summary, the technical solution provided in this application reuses the opening area reserved for the first device on the back cover to house the transmitting coil. The first device is one that needs to maintain an unobstructed transmission path with the outside world during operation; this transmission path can be an optical path. For example, the first device may be one that needs to send light to the outside world or sense external light. Therefore, it is no longer necessary to create separate openings in other parts of the back cover to house the transmitting coil. This allows the electronic device to have wireless charging functionality while using a relatively complete metal back cover. Furthermore, the metal back cover does not form electromagnetic shielding for the transmitting coil, ensuring the efficiency of wireless charging and improving the strength and aesthetics of the electronic device's back cover.

[0177] It is understood that when adopting the technical solution of this application, the electronic device can also use a back cover made of non-metallic materials such as glass, ceramic, or plastic. Since the back cover no longer blocks the transmitting coil, it can also improve the coupling efficiency between the first coil and the receiving coil on the wireless keyboard when the electronic device is charging the wireless keyboard, thereby improving the efficiency of wireless charging.

[0178] In this application, the first device arranged in the reserved first through hole can be a flash, a TOF sensor, or a camera module, etc. The specific implementation methods are described below.

[0179] The following section will first explain the implementation method when the first device is a flash lamp or a TOF sensor.

[0180] Referring again to Figure 4A, the first device 12 in Figure 4A is a flash or a TOF sensor, and the second through hole 104 is a through hole reserved for the layout of the camera module 105.

[0181] The projection of the first coil 103 onto the plane of the rear housing 11 lies within the area of ​​the first through hole 101. The projection of the outermost coil of the first coil 103 onto the plane of the rear housing 11 can be close to the edge of the first through hole 101, thereby maximizing the utilization of the area of ​​the first through hole 101. By increasing the area of ​​the first coil 103, the coupling area during wireless charging can be increased, thereby improving the wireless charging efficiency.

[0182] In one possible implementation, the electronic device further includes a first soft magnetic material layer 15, on which a first coil 103 may be disposed. The wireless keyboard also includes a second soft magnetic material layer 25, on which a second coil 203 may be disposed. It is understood that either the first soft magnetic material layer 15 or the second soft magnetic material layer 25 may be present; the following description assumes both are present.

[0183] The first soft magnetic material layer 15 and the second soft magnetic material layer 25 can specifically be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite. These materials can better guide magnetic field lines, form a circuit, and improve the coupling coefficient between the first coil 103 and the second coil 203, thereby improving the efficiency of wireless charging. They can also reduce the impact of electromagnetic waves generated by the first coil on other devices. Furthermore, combinations of these materials can be used.

[0184] Nanocrystalline materials are materials formed from crystals with nanoscale dimensions (1–10 nm).

[0185] Amorphous materials are non-ordered, grainless alloys, also known as metallic glasses or amorphous metals.

[0186] Silicon steel typically contains 0.5% to 4.8% silicon and is usually made into thin sheets, commonly known as silicon steel sheets. Adding silicon to pure iron can eliminate the phenomenon of magnetic materials changing their magnetism over time.

[0187] Ferrites are composite oxides with iron oxide and other iron group or rare earth group oxides as the main components. They have high magnetic permeability. For example, the relative magnetic permeability of NiZn (MgZn) ferrite can reach 4000, and the relative magnetic permeability of MnZn ferrite can reach 30000.

[0188] Referring to Figure 7, this figure is a schematic diagram of the first coil and the second coil being aligned according to an embodiment of this application.

[0189] The first soft magnetic material layer 15 and the first coil 103 can be fixed together with adhesive. The first coil 103 can be made of copper.

[0190] The first soft magnetic material layer 15 needs to reserve a corresponding opening area 151 based on the position of the first device 12, so as to avoid the first soft magnetic material layer 15 blocking the first device 12.

[0191] The first soft magnetic material layer 15 can be set as a rectangle or a shape similar to the first coil 103. When the area of ​​the first soft magnetic material layer 15 is generally greater than or equal to that of the first coil 103, the ability to improve the coupling coefficient is better.

[0192] Similarly, the second soft magnetic material layer 25 can be set as a rectangle or a shape similar to the second coil 203. When the area of ​​the second soft magnetic material layer 25 is generally greater than or equal to that of the second coil 203, the ability to improve the coupling coefficient is better.

[0193] The second soft magnetic material layer 25 needs to reserve a corresponding opening area 251 based on the position of the first device 12, so as to avoid the second soft magnetic material layer 25 blocking the first device 12.

[0194] In Figure 7, the second coil 203 is located between the back cover of the electronic device and the second soft magnetic material layer 25. Specifically, when the wireless keyboard is attached to the back cover of the electronic device, the layers from top to bottom are: first soft magnetic material layer 15, first coil 103, second coil 203, and second soft magnetic material layer 25. That is, the first coil is located between the two soft magnetic material layers.

[0195] Referring again to Figure 4A, when the first device 12 is a flash or a TOF sensor, the distance between the first device 12 and the camera module 15 is relatively close. The camera module 15 is a rear camera module.

[0196] When the first coil 103 is working, the alternating magnetic field generated by the first coil 103 may affect the normal operation of the camera. Specifically, if the camera module 15 is enabled, when the first coil 103 and the camera module 15 are working simultaneously, interference stripes may appear on the preview interface of the electronic device. The following description, in conjunction with the accompanying drawings, explains in detail the reasons why the camera module 15 is interfered with by the first coil 103.

[0197] See Figure 8, which is a schematic diagram of the principle provided in the embodiment of this application.

[0198] When the first coil 103 is working, the alternating magnetic field generated by the first coil 103 transfers most of the energy to the second coil 203, but there will be some leakage magnetic field reaching the camera module 105.

[0199] The camera module 15 includes a photosensitive element, which can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element is used to convert light signals into electrical signals. The metal traces on the printed circuit board (PCB) of the camera module 105 are generally traces in the XY plane, while the alternating electromagnetic field contains an alternating magnetic field component in the XZ plane, as shown by the arrows in Figure 9.

[0200] When the first coil 103 is working, the alternating electromagnetic field causes interference currents to be generated on the metal traces on the circuit board of the camera module 15. These metal traces may include the power supply lines of the photosensitive element.

[0201] Furthermore, alternating electromagnetic fields can generate power supply noise on the power supply of the image sensor. Interference current and power supply noise can interfere with the operation of the image sensor, which may result in interference stripes appearing on the preview screen.

[0202] In one possible implementation, to reduce interference with the camera module 105, the interference source can be optimized. The interference source is the first coil 103. In practical applications, by appropriately selecting the inductance value of the first coil 103, the number and area of ​​the soft magnetic material layer 15, the number of turns of the coil, and the coil area, the magnitude of the interference from the first coil 103 to the camera module 105 can be changed.

[0203] For example, the smaller the first coil 103 is, the smaller the range of energy radiation and leakage, and the less likely it is to cause interference; the more layers of soft magnetic material there are and the larger the area, the better it can shield against interference. However, the smaller the size of the first coil 103, the lower the power it can transmit. It is necessary to take into account the actual power requirements. This is a process of balancing.

[0204] In another possible implementation, interference from the first coil 103 to the camera module 105 can be reduced by extending the interference path. The electromagnetic waves from wireless charging are near-field transmissions, and their energy decreases exponentially with distance. Therefore, extending the interference path, i.e., increasing the distance between the first coil 103 and the camera module 105, can significantly reduce interference. However, due to industrial design (ID) limitations, the camera module 105 cannot be too far from devices such as the flash and TOF sensor, thus limiting the adjustment capability of this method.

[0205] The implementation method adopted in this application embodiment is to set a shielding layer below the camera module 105. The shielding layer is made of metal material and is used to reduce the interference received by the camera module 105. The following is a detailed description in conjunction with the accompanying drawings.

[0206] See Figure 9, which is a schematic diagram of the principle provided in the embodiment of this application.

[0207] The shielding layer 106 is located below the camera module 105. When the alternating magnetic field generated by the first coil 103 passes through the camera module 105, it reaches the shielding layer 106. When the alternating magnetic field acts on the shielding layer 106, a circular alternating current, also known as an eddy current, is generated on the shielding layer 106. According to Lenz's law, the alternating electromagnetic field generated by the alternating current on the shielding layer 106 (as shown by the dashed arrow in Figure 9) is always opposite in direction to the alternating magnetic field generated by the first coil 103. When the two electromagnetic fields in opposite directions act on the camera module 105, they cancel each other out, which can significantly reduce the influence of the alternating magnetic field on the camera module 105.

[0208] Referring to Figure 10, this figure is a schematic diagram of a camera module provided in an embodiment of this application.

[0209] The camera module may specifically include a lens module 1051 and an image sensor 1052. The camera module is mounted on a PCB 107 and can be connected to other PCBs via a board-to-board (BTB) connector 1071 on the PCB 107.

[0210] The camera module is mounted on the first surface of PCB 107, and the shielding layer 106 is mounted on the second surface of PCB 107. This implementation method is easy to implement when setting the shielding layer 106, and does not require major adjustments to the existing camera module and PCB layout. The technical effects of the technical solution of this application are illustrated below with simulation results.

[0211] Referring to Figure 11, this figure is a schematic diagram of a simulation model of an electronic device provided in an embodiment of this application.

[0212] Figure 11 illustrates a simulation model of a partial area of ​​the electronic device 10, including the first device 12, the first coil 103, and the camera module 105.

[0213] In Figure 11, one grid in the Y direction represents a length of 10mm, and one grid in the X direction represents a length of 20mm. The first coil 103 is shaped like a racetrack, and the projection distance L1 between the first coil 103 and the photosensitive element 1052 of the camera module 105 on the XY plane is 14.3mm.

[0214] Taking the operating frequency of the first coil as 130.00kHz as an example, without setting the shielding layer 106, the simulation shows that the maximum value of the induced electromotive force of the camera module in the Z direction (perpendicular to the XY plane in Figure 11) is 0.030426mV.

[0215] The induced electromotive force (EMF) is the electromotive force generated when a camera module is coupled with an alternating magnetic field. It directly characterizes the degree to which the camera module is affected by the alternating magnetic field. The larger the maximum value of the induced EMF, the more severe the influence of the alternating magnetic field on the camera module.

[0216] In one possible implementation, the shielding layer 106 can be a metal material layer. This application embodiment does not limit the specific type of metal material; a copper layer is used as an example for simulation.

[0217] The operating frequency of the first coil is 130.00kHz. The simulation shows that the maximum value of the induced electromotive force of the camera module in the Z direction is 0.0050988mV, which is about 83.242% lower than the original value of 0.030426mV. The anti-interference effect is extremely significant.

[0218] In another possible implementation, the shielding layer 106 can be a metal coil. This application embodiment does not limit the material of the metal coil, taking copper as an example.

[0219] When the first and second ends of the metal coil are directly short-circuited, the metal coil forms a closed loop current under the action of the alternating magnetic field, which improves the anti-interference effect.

[0220] The operating frequency of the first coil is 130.00kHz. The simulation shows that the maximum value of the induced electromotive force of the camera module in the Z direction is 0.0095811, which is about 68.510% lower than the original value of 0.030426mV, indicating a significant anti-interference effect.

[0221] Furthermore, the applicant also simulated a scenario where the shielding layer 106 uses soft magnetic nanocrystals. They found that when the operating frequency of the first coil was 130.00 kHz, the maximum induced electromotive force of the camera module in the Z direction was 0.032464 mV, which was actually higher. This is due to the high permeability and low magnetic loss of the soft magnetic material, which allows it to better guide magnetic field lines. Therefore, although soft magnetic materials cannot be used to achieve anti-interference for the camera module, it demonstrates that using the first soft magnetic material layer 15 and the second soft magnetic material layer 25 in the above embodiments can improve the coupling coefficient between the first coil and the second coil.

[0222] In summary, the technical solution provided in this application reuses the opening area reserved for the first device on the back cover to house the first coil. The first device is a device that needs to emit light or sense external light, specifically a flash or a TOF sensor. Therefore, it is no longer necessary to create separate openings in other parts of the back cover to house the first coil, allowing the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength of the back cover and the refinement of its appearance. Furthermore, to address the issue of interference to the camera module caused by the first coil, this application embodiment provides a shielding layer at the bottom of the camera module. This shielding layer reduces interference from alternating magnetic fields on the camera module, thereby preventing abnormalities in the screen preview when the rear camera module and the first coil are working simultaneously, ensuring a better user experience.

[0223] Based on the electronic device provided in Figure 4A, this application embodiment also provides a wireless keyboard adapted to the electronic device. For details, please refer to the description corresponding to Figure 5, which will not be repeated here.

[0224] The above embodiments illustrate the implementation method when the first device is a flash or a TOF sensor, and only the first device is set in the first through hole. The following describes the implementation method when the first device is a flash or a TOF sensor, but the first through hole also includes a camera module in addition to the first device.

[0225] Referring to Figure 12, this figure is a schematic diagram of another electronic device provided in an embodiment of this application.

[0226] The difference between the electronic device shown in Figure 12 and that in Figure 4A is that the back cover 11 of the electronic device shown in Figure 12 only includes a reserved through hole, which is the first through hole 101. The first camera module 105A of the electronic device is also arranged in the first through hole 101.

[0227] At this time, the first coil 103 surrounds the first device 12 and the first camera module 105A, and the projection of the outermost coil of the first coil 103 on the plane where the rear shell 11 is located can be as close as possible to the edge of the first through hole 101, so as to increase the coupling area of ​​the first coil 103 and improve the wireless charging efficiency of the first coil 103.

[0228] In this implementation, the first camera module 105A can be mounted on the first PCB.

[0229] See also Figure 13, which is a side view of an embodiment of this application.

[0230] In this implementation, the electronic device also includes a first shielding layer 106A, which is made of a metal material, such as a metal material layer or a metal coil.

[0231] The first shielding layer 106A is located below the first camera module 105A. Specifically, the first camera module 105A is disposed on the first surface of the first circuit board 107A of the electronic device, and the first shielding layer 106A is disposed on the second surface of the first circuit board 107A. The first surface and the second surface are opposite to each other.

[0232] The principle of how the first shielding layer 106A reduces the interference of the alternating magnetic field on the first camera module 105A can be found in the description in the above embodiments, and will not be repeated here.

[0233] In one possible implementation, the electronic device further includes a first soft magnetic material layer 15, on which a first coil 103 may be disposed. The wireless keyboard also includes a second soft magnetic material layer 25, on which a second coil 203 may be disposed. It is understood that either the first soft magnetic material layer 15 or the second soft magnetic material layer 25 may be present; the following description assumes both are present.

[0234] The first soft magnetic material layer 15 and the second soft magnetic material layer 25 can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite, which can better guide magnetic field lines, form a circuit, improve the coupling coefficient between the first coil 103 and the second coil 203, and thus improve the efficiency of wireless charging. In addition, a combination of the above materials can also be used.

[0235] The first soft magnetic material layer 15 needs to reserve corresponding opening areas 151 based on the positions of the first device 12 and the first camera module 105A, so as to avoid the first soft magnetic material layer 15 blocking the first device 12 and the first camera module 105A.

[0236] The second soft magnetic material layer 25 needs to reserve corresponding opening areas 251 based on the positions of the first device 12 and the first camera module 105A, so as to avoid the second soft magnetic material layer 25 blocking the first device 12 and the first camera module 105A.

[0237] Referring to Figure 14, this figure is a schematic diagram of another wireless keyboard provided in an embodiment of this application.

[0238] In order to match the electronic device shown in Figure 12, the wireless keyboard 20 may have only one third through hole 201. The third through hole is used to prevent the bracket 22 from blocking the camera module and the first device of the electronic device.

[0239] The second coil 201 surrounds the third through hole 201. In one possible implementation, the area of ​​the third through hole 201 is smaller than the area of ​​the first through hole 101 in Figure 12. The area of ​​the outermost coil of the first coil 103 is generally smaller than the area of ​​the first through hole 101. In order to align the first coil 103 with the second coil 203, this application correspondingly reduces the opening area of ​​the third through hole 201 on the wireless keyboard. Thus, when the metal back cover 11 is attached to the second bracket 222, the second coil 203 set in the second bracket 222 can be aligned with the first coil 103 to improve wireless charging efficiency.

[0240] It is understandable that the area of ​​the third through hole 201 should at least meet the light transmission requirements of the first device 12 and the first camera module 105A.

[0241] In summary, by utilizing the technical solution provided in this application embodiment, the pre-reserved opening area on the back cover for the first device and camera module is reused to house the first coil. Therefore, it is no longer necessary to make separate openings in other parts of the back cover to house the first coil, enabling the electronic device to have wireless charging functionality while using a relatively complete metal back cover, thus improving the strength of the back cover and the refinement of its appearance.

[0242] In addition, to address the issue that the first coil may cause interference to the camera module, a shielding layer is provided at the bottom of the camera module in this embodiment. The shielding layer reduces the interference from the alternating magnetic field on the camera module, thereby preventing abnormalities in the screen preview when the rear camera module and the first coil of the electronic device are working simultaneously, and ensuring the user experience.

[0243] In the embodiment shown in Figure 12 above, when the first through hole is a reserved through hole for laying out the first device and the first camera module, the first coil surrounds the first device and the first camera module. The implementation method when the first coil only surrounds the first device is described below.

[0244] Referring to Figure 15, this figure is a schematic diagram of another electronic device provided in an embodiment of this application.

[0245] At this time, the rear shell 11 of the electronic device includes only one reserved through hole, which is the first through hole 101. The first camera module 105A of the electronic device is also arranged in the first through hole 101.

[0246] At this time, the first coil 103 surrounds the first device 12, and the area occupied by the first coil 103 can be maximized to improve the wireless charging efficiency of the first coil 103 through the coupling area of ​​the first coil 103. When the first coil 103 surrounds the first camera module 105A, the first camera module 105A will be in a strong alternating magnetic field, resulting in the first camera module 105A being greatly affected by the magnetic field. Therefore, in this embodiment, the first coil 103 does not surround both the first device 12 and the first camera module 105A at the same time.

[0247] See also Figures 16 and 17. Figure 16 is a second side view provided in an embodiment of this application; Figure 17 is a partial schematic diagram of a wireless keyboard provided in an embodiment of this application.

[0248] For ease of explanation, Figure 17 only shows the enlarged area of ​​the wireless keyboard stand 22 with openings.

[0249] In this implementation, the electronic device also includes a first shielding layer 106A, which is made of a metal material, such as a metal material layer or a metal coil.

[0250] The first shielding layer 106A is located below the first camera module 105A. Specifically, the first camera module 105A is disposed on the first surface of the first circuit board 107A of the electronic device, and the first shielding layer 106A is disposed on the second surface of the first circuit board 107A. The first surface and the second surface are opposite to each other.

[0251] The principle of how the first shielding layer 106A reduces the interference of the alternating magnetic field on the first camera module 105A can be found in the description in the above embodiments, and will not be repeated here.

[0252] In one possible implementation, the electronic device further includes a first soft magnetic material layer 15, on which a first coil 103 may be disposed. The wireless keyboard also includes a second soft magnetic material layer 25, on which a second coil 203 may be disposed.

[0253] It is understandable that the first soft magnetic material layer 15 and the second soft magnetic material layer 25 may also be provided with only one of them; the following description takes the simultaneous provision as an example.

[0254] The first soft magnetic material layer 15 and the second soft magnetic material layer 25 can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite, which can better guide magnetic field lines, form a circuit, improve the coupling coefficient between the first coil 103 and the second coil 203, and thus improve the efficiency of wireless charging. In addition, a combination of the above materials can also be used.

[0255] The first soft magnetic material layer 15 needs to reserve a corresponding opening area 151 based on the position of the first device 12, so as to avoid the first soft magnetic material layer 15 blocking the first device 12.

[0256] Similarly, the second soft magnetic material layer 25 needs to reserve a corresponding opening area 251 based on the position of the first device 12 to avoid the second soft magnetic material layer 25 blocking the first device 12.

[0257] To match the electronic device shown in Figure 12, the wireless keyboard 20 may be provided with a third through-hole 203 and a fourth through-hole 204. The third through-hole 203 is used to prevent the bracket 22 from obstructing the first device 12 of the electronic device, and the fourth through-hole 204 is used to prevent the bracket 22 from obstructing the first camera module 105A of the electronic device.

[0258] Normally, when the first device 12 is a TOF sensor or a flash, the area occupied by the first device 12 is smaller than the area occupied by the first camera module 105A. Therefore, the area of ​​the fourth through hole 204 is larger than the area of ​​the third through hole 203.

[0259] The second coil 201 surrounds the third through hole 201, and the second coil 201 is disposed inside the bracket 22. As shown in Figure 16, the through holes on the electronic device and the wireless keyboard are both circular, which is used as an example for explanation. The diameter of the first through hole 101 on the electronic device can be D1, and D1 is relatively large so that the area inside the first through hole 101 is sufficient to arrange the first device 12 and the first camera module 105A.

[0260] The diameter of the third through hole 201 can be D3, and D3 needs to meet the light transmission requirements of the first device 12.

[0261] The diameter of the fourth through hole 204 can be D2, and D2 needs to meet the light transmission requirements of the first camera module 105A.

[0262] D1 is greater than the sum of D2 and D3, and the diameter D3 of the third through hole 201 is generally smaller than D2. In Figure 15, the projection of the first coil 103 on the plane of the back cover 11 is located inside the first through hole 101 to avoid the metal back cover 11 from blocking the first coil 103. Also, the first coil 103 does not surround the first camera module 105A. In order to make the first coil 103 and the second coil 203 aligned, the solution of this application reduces the opening area of ​​the third through hole 201 on the wireless keyboard accordingly, and sets the second coil 203 at the position directly opposite the first coil 103, so that when the metal back cover 11 is attached to the bracket 22, the second coil 203 set in the bracket 22 can be aligned with the first coil 103, thereby improving the wireless charging efficiency.

[0263] In the solution provided in this application embodiment, the first coil 103 does not surround the first camera module 105A. At this time, the distance between the first camera module 105A and the first coil 103 is relatively far, which can reduce the influence of the alternating magnetic field on the first camera module 105A.

[0264] In summary, the technical solution provided in this application reuses the pre-reserved opening area on the back cover for the first device and camera module to house the first coil. The first coil surrounds the first device to reduce interference with the camera module. It eliminates the need for separate openings in other parts of the back cover to house the first coil, allowing the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength and aesthetics of the back cover. Furthermore, to address the issue of interference to the camera module caused by the first coil, this application embodiment includes a shielding layer at the bottom of the camera module. This shielding layer reduces interference from alternating magnetic fields on the camera module, thereby preventing abnormalities in the screen preview when the rear camera module and the first coil are working simultaneously, ensuring a better user experience.

[0265] The following explains how to implement multiple camera modules on an electronic device.

[0266] Referring to Figure 18, this figure is a schematic diagram of another electronic device provided in an embodiment of this application.

[0267] At this time, the rear cover 11 of the electronic device includes two reserved through holes, namely a first through hole 101 and a second through hole 104. The first through hole 101 houses the first device 12 and the first camera module 105A of the electronic device. The first device 12 can be a flash or a TOF sensor. The second through hole 104 houses the second camera module 105B of the electronic device.

[0268] At this time, the first coil 103 surrounds the first device 12, and the area occupied by the first coil 103 can be increased as much as possible. Through the coupling area of ​​the first coil 103, the wireless charging efficiency of the first coil 103 is improved.

[0269] If the first coil 103 surrounds the first camera module 105A, the first camera module 105A will be in a strong alternating magnetic field, which will cause the first camera module 105A to be greatly affected by the magnetic field. Therefore, in the scheme adopted in this application embodiment, the first coil 103 does not surround the first device 12 and the first camera module 105A at the same time, but only surrounds the first device 12, which reduces the interference to the first camera module 105A.

[0270] When an electronic device includes multiple camera modules, the functions of the multiple camera modules are different. The lens in the first camera module 105A is the main camera lens, which generally occupies a small area; the lens in the second camera module 105B is a telephoto lens, which is generally larger. Therefore, the second through hole 104 may not have enough space to arrange the first coil 103, while the first through hole 101 usually has enough space to arrange the first coil 103. Therefore, the solution provided in this application embodiment sets the first coil 103 in the second through hole 104.

[0271] See also Figures 19 and 20. Figure 19 is a side view three provided in an embodiment of this application; Figure 20 is a partial schematic diagram two of a wireless keyboard provided in an embodiment of this application.

[0272] For ease of explanation, Figure 20 only shows the enlarged area of ​​the wireless keyboard stand 22 with openings.

[0273] In this implementation, the electronic device further includes a first shielding layer 106A and a second shielding layer 106B. The first shielding layer 106A and the second shielding layer 106B are made of metallic materials, such as metallic material layers or metallic coils.

[0274] The first shielding layer 106A is located below the first camera module 105A. Specifically, the first camera module 105A is disposed on the first surface of the first circuit board 107A of the electronic device, and the first shielding layer 106A is disposed on the second surface of the first circuit board 107A, with the first and second surfaces facing each other.

[0275] The second shielding layer 106B is located below the second camera module 105B. Specifically, the second camera module 105B is disposed on the first surface of the second circuit board 107B of the electronic device, and the second shielding layer 106B is disposed on the second surface of the second circuit board 107B, with the first and second surfaces facing each other.

[0276] The principle of how the first shielding layer 106A and the second shielding layer 106B reduce the interference of the alternating magnetic field on the corresponding camera module can be found in the description in the above embodiments, and will not be repeated here.

[0277] In one possible implementation, the electronic device further includes a first soft magnetic material layer 15, on which a first coil 103 may be disposed. The wireless keyboard also includes a second soft magnetic material layer 25, on which a second coil 203 may be disposed.

[0278] It is understandable that the first soft magnetic material layer 15 and the second soft magnetic material layer 25 may only have one of them; the following description assumes both are present. Specifically, the first soft magnetic material layer 15 and the second soft magnetic material layer 25 can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite. These materials can better guide magnetic field lines, form a circuit, and improve the coupling coefficient between the first coil 103 and the second coil 203, thereby improving the efficiency of wireless charging. Furthermore, a combination of these materials can also be used.

[0279] The first soft magnetic material layer 15 needs to reserve corresponding opening areas 151 based on the positions of the first device 12 and the first camera module 105A, so as to avoid obscuring the first device 12.

[0280] Similarly, the second soft magnetic material layer 25 needs to reserve corresponding opening areas 251 based on the positions of the first device 12 and the first camera module 105A to avoid obstructing the first device 12.

[0281] To match the electronic device shown in Figure 18, the wireless keyboard 20 may be provided with a third through hole 201, a fourth through hole 204 and a fifth through hole 205.

[0282] The third through hole 203 is used to prevent the bracket 22 from obstructing the first device 12 of the electronic device, the fourth through hole 204 is used to prevent the bracket 22 from obstructing the first camera module 105A of the electronic device, and the fifth through hole 205 is used to prevent the bracket 22 from obstructing the second camera module 105B of the electronic device.

[0283] The second coil 201 surrounds the third through hole 201, and the second coil 201 is disposed inside the bracket 22.

[0284] Normally, when the first device 12 is a TOF sensor or a flash, the area occupied by the first device 12 is smaller than the area occupied by the first camera module 105A. Therefore, the area of ​​the fourth through hole 204 is larger than the area of ​​the third through hole 203.

[0285] Furthermore, when the lens in the second camera module 105B is a telephoto lens, since telephoto lenses are generally larger, the area of ​​the fifth through hole 205 is correspondingly larger than the area of ​​the fourth through hole 204.

[0286] Referring to Figure 19, the following explanation uses circular through-holes on electronic devices and wireless keyboards as examples. The diameter of the first through-hole 101 on the electronic device can be D1, which is relatively large, so that the area within the first through-hole 101 is sufficient to accommodate the first device 12 and the first camera module 105A.

[0287] The diameter of the second through hole 104 can be D4, which can be greater than, equal to or less than D1. This application embodiment does not impose specific limitations.

[0288] The diameter of the third through hole 201 can be D3, and D3 needs to meet the light transmission requirements of the first device 12.

[0289] The diameter of the fourth through hole 204 can be D2, and D2 needs to meet the light transmission requirements of the first camera module 105A.

[0290] The diameter of the fifth through hole 205 can be D5, and D5 needs to meet the light transmission requirements of the second camera module 105B.

[0291] D5 can be greater than or equal to D4. Normally, D2 is greater than D2.

[0292] D1 is greater than the sum of D2 and D3, and the diameter D3 of the third through hole 201 is generally smaller than D2. In Figure 18, the first coil 103 is disposed within the first through hole 101 to prevent the metal back cover 11 from obscuring the first coil 103, and the first coil 103 does not surround the first camera module 105A. To align the first coil 103 with the second coil 203, this embodiment of the application correspondingly reduces the opening area of ​​the third through hole 201 on the wireless keyboard, thereby placing the second coil 203 at a position directly opposite the first coil 103. When the metal back cover 11 is attached to the bracket 22, the second coil 203 disposed within the bracket 22 can be aligned with the first coil 103, thereby improving wireless charging efficiency.

[0293] In the solution provided in this application embodiment, the first coil 103 does not surround the first camera module 105A. At this time, the distance between the first camera module 105A, the second camera module 105B and the first coil 103 is relatively far, which can reduce the influence of the alternating magnetic field on the camera module.

[0294] In summary, by utilizing the technical solution provided in this application, when an electronic device has multiple camera modules, the opening area reserved on the back cover for the first device and the camera module is reused to house the first coil. The first coil is arranged around the first device to reduce interference to the first camera module. It is no longer necessary to make separate openings in other parts of the back cover to house the first coil, allowing the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength of the back cover and the refinement of its appearance.

[0295] In addition, to address the issue that the first coil may cause interference to the camera module, a shielding layer is provided at the bottom of the camera module in this embodiment. The shielding layer reduces the interference from the alternating magnetic field on the camera module, thereby preventing abnormalities in the screen preview when the rear camera module and the first coil of the electronic device are working simultaneously, and ensuring the user experience.

[0296] The following describes the implementation method when the first through-hole containing the first coil only includes the camera module.

[0297] Referring to Figure 21, this figure is a schematic diagram of another electronic device provided in an embodiment of this application.

[0298] The rear cover of the electronic device may include multiple reserved through holes. Figure 21 shows an example including a first through hole 101 and a second through hole 104.

[0299] The first device 12 of the electronic device is arranged inside the first through hole 101, and the first device 12 is the first camera module.

[0300] The second camera module 105 and the second device 108 of the electronic device are arranged within the second through-hole 104. The second device 108 can be a flash or a TOF sensor.

[0301] The first coil 103 surrounds the first device 12, and the area occupied by the first coil 103 can be increased as much as possible. For example, the projection of the outermost coil on the plane of the rear shell 11 is as close as possible to the edge of the first through hole 10. By increasing the coupling area of ​​the first coil 103, the wireless charging efficiency of the first coil 103 can be improved.

[0302] See also Figures 22 and 23. Figure 22 is a side view of an embodiment of this application; Figure 23 is a partial schematic diagram of a wireless keyboard provided in an embodiment of this application.

[0303] For ease of explanation, Figure 23 only shows the enlarged area of ​​the wireless keyboard stand 22 with openings.

[0304] In this implementation, the electronic device further includes a first shielding layer 106A and a second shielding layer 106B. The first shielding layer 106A and the second shielding layer 106B are made of metallic materials, such as metallic material layers or metallic coils.

[0305] The first shielding layer 106A is located below the first device 12. Specifically, the first device 12 is disposed on the first surface of the first circuit board 107A of the electronic device, and the first shielding layer 106A is disposed on the second surface of the first circuit board 107A, with the first surface and the second surface facing each other.

[0306] The second shielding layer 106B is located below the second camera module 105. Specifically, the second camera module 105 is disposed on the first surface of the second circuit board 107B of the electronic device, and the second shielding layer 106B is disposed on the second surface of the second circuit board 107B, with the first and second surfaces facing each other.

[0307] The principle of how the first shielding layer 106A and the second shielding layer 106B reduce the interference of the alternating magnetic field on the corresponding camera module can be found in the description in the above embodiments, and will not be repeated here.

[0308] In one possible implementation, the electronic device further includes a first soft magnetic material layer 15, on which a first coil 103 may be disposed. The wireless keyboard also includes a second soft magnetic material layer 25, on which a second coil 203 may be disposed.

[0309] It is understandable that the first soft magnetic material layer 15 and the second soft magnetic material layer 25 may only have one of them; the following description assumes both are present. Specifically, the first soft magnetic material layer 15 and the second soft magnetic material layer 25 can be made of materials with high permeability and low magnetic loss, such as nanocrystalline materials, amorphous materials, silicon steel, and ferrite. These materials can better guide magnetic field lines, form a circuit, and improve the coupling coefficient between the first coil 103 and the second coil 203, thereby improving the efficiency of wireless charging. Furthermore, a combination of these materials can also be used.

[0310] The first soft magnetic material layer 15 needs to have a corresponding opening area 151 reserved based on the position of the first device 12 to avoid obstructing the first device 12. Similarly, the second soft magnetic material layer 25 needs to have a corresponding opening area 251 reserved based on the position of the first device 12 to avoid obstructing the first device 12.

[0311] To match the electronic device shown in Figure 21, the wireless keyboard 20 may be provided with a third through hole 201 and a fourth through hole 204.

[0312] The third through hole 203 is used to prevent the bracket 22 from obstructing the first device 12 of the electronic device, and the fourth through hole 204 is used to prevent the bracket 22 from obstructing the second camera module 105 of the electronic device.

[0313] The second coil 201 surrounds the third through hole 201, and the second coil 201 is disposed inside the bracket 22.

[0314] Referring to Figure 22, the following explanation uses circular through-holes on both the electronic device and the wireless keyboard as an example. The diameter of the first through-hole 101 on the electronic device can be D1, and the diameter of the second through-hole 104 on the electronic device can be D2. This application embodiment does not specifically limit the relationship between the sizes of D1 and D2.

[0315] The diameter of the third through hole 201 can be D3, and D3 needs to meet the light transmission requirements of the first device 12.

[0316] The diameter of the fourth through hole 204 can be D4, and D4 needs to meet the light transmission requirements of the second camera module 105 and the second device 108. The figure only shows the case where D4 is equal to D2. In addition, D4 can also be greater than D2.

[0317] In this embodiment, D3 is less than D1. To align the first coil 103 with the second coil 203, the solution in this embodiment reduces the opening area of ​​the third through hole 201 on the wireless keyboard, so that the second coil 203 is positioned directly opposite the first coil 103. When the metal back cover 11 is attached to the bracket 22, the second coil 203 disposed within the bracket 22 can be aligned with the first coil 103, thereby improving wireless charging efficiency.

[0318] In practical applications, if the first device 12 uses a telephoto lens, resulting in a small usable area of ​​the first through hole 101, the area of ​​the first through hole 101 can be appropriately increased to ensure that there is enough space to set the first coil 103. It is understood that the appropriate enlargement of the first through hole 101 will not affect the strength of the back cover or the refinement of its appearance.

[0319] In summary, by utilizing the technical solution provided in this application embodiment, when an electronic device has multiple camera modules, the opening area reserved for the camera modules on the back cover is reused to house the first coil. It is no longer necessary to create separate openings in other parts of the back cover to house the first coil. This allows the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength of the back cover and the refinement of its appearance.

[0320] In addition, to address the issue that the first coil may cause interference to the camera module, a shielding layer is provided at the bottom of the camera module in this embodiment. The shielding layer reduces the interference from the alternating magnetic field on the camera module, thereby preventing abnormalities in the screen preview when the rear camera module and the first coil of the electronic device are working simultaneously, and ensuring the user experience.

[0321] In the above embodiments, the interference of the alternating magnetic field on the rear camera module is reduced by the shielding layer. In addition, the rear camera module and the first coil can be controlled to work in a time-division manner, fundamentally eliminating the interference of the first coil on the rear camera module. The following is a detailed description in conjunction with the accompanying drawings.

[0322] Referring to Figure 24, this figure is a flowchart of a wireless charging control method provided in an embodiment of this application.

[0323] This method can be applied to processors in electronic devices. When the first coil for charging the wireless keyboard is in operation, the method specifically includes the following steps:

[0324] S11: Get the identifier of the currently enabled camera module.

[0325] When a user launches the camera application, or when a user invokes the camera module through another application, the processor can obtain the identifier of the currently enabled camera module.

[0326] The camera modules on electronic devices all have corresponding identifiers. The physical camera modules on electronic devices mainly include two categories: front camera modules and rear camera modules.

[0327] The first coil for charging the wireless keyboard has a significant impact on the rear camera module, but its impact on the front camera module is negligible. Therefore, the solution provided in this application determines the category of the currently enabled camera module based on the camera module's identifier.

[0328] It is understandable that different devices or manufacturers may use different methods to identify camera modules. The following description is only an example and does not constitute a limitation on the technical solution of this application.

[0329] In one example, the identifier for the front camera module is 0, and the identifier for the rear camera module ranges from 1 to 8.

[0330] S12: Determine whether the currently enabled camera module is a rear camera module.

[0331] The processor can determine whether the currently enabled camera module is a rear camera module based on the identifier. Understandably, the correspondence between the camera module identifier and the camera module category is predetermined and stored.

[0332] If yes, execute S13; otherwise, execute S14.

[0333] S13: Controls the first coil for charging the wireless keyboard to stop working.

[0334] At this time, the rear camera module is activated, which is easily affected by the alternating magnetic field generated by the first coil. Therefore, the first coil can be controlled to stop working, eliminating the interference of the first coil to the rear camera module from the root.

[0335] S14: Controls the first coil for charging the wireless keyboard to continue operating.

[0336] At this time, the front-facing camera module is activated, so there is no need to stop the first coil from working.

[0337] It is understood that the steps in the above embodiments are merely illustrative and do not constitute a limitation on the technical solution of this application. In practical applications, modifications can be made based on the above steps. For example, in S12, it can be determined whether the currently enabled camera module is a front-facing camera module. If so, S14 is executed; otherwise, S13 is executed.

[0338] Furthermore, when using the solution provided in the embodiments of this application, a shielding layer may not be required below the camera module.

[0339] In summary, by utilizing the solution provided in this application embodiment, when the first coil for charging the wireless keyboard is in working condition, and the rear camera is enabled, the processor of the electronic device can control the first coil to pause operation, thereby preventing the rear camera module from experiencing abnormal screen preview due to interference from the alternating magnetic field, thus ensuring a better user experience.

[0340] Based on the tablet computer and wireless keyboard provided in the above embodiments, this application also provides a wireless charging system, which will be described in detail below with reference to the accompanying drawings.

[0341] The wireless charging system includes an electronic device and a wireless keyboard. A schematic diagram of the electronic device is shown in Figure 25, and a schematic diagram of the wireless keyboard is shown in Figure 26.

[0342] The electronic device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 13, a charging management module 140, a power management module 141, a first battery 130, a first coil 103, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, buttons 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc.

[0343] It is understood that the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the electronic device. In other embodiments of this application, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0344] Processor 110 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0345] The controller can generate operation control signals based on the instruction opcode and timing signals to complete the control of instruction fetching and execution.

[0346] The processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the instruction or data again, it can retrieve it directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0347] The wireless communication function of electronic devices can be realized through antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, modem processor and baseband processor, etc.

[0348] The power management module 141 connects the first battery 130, the charging management module 140, and the processor 110. The power management module 141 receives input from the first battery 130 and / or the charging management module 140, and supplies power to the processor 110, internal memory 121, display screen 194, camera 193, and wireless communication module 160, etc. The power management module 141 can also monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage current, impedance). In some other embodiments, the power management module 141 may also be located within the processor 110.

[0349] In other embodiments, the power management module 141 and the charging management module 140 may also be housed in the same device. The charging management module 140 may integrate the inverter circuit 14 shown in FIG3 and the first charging control module 12.

[0350] In one possible implementation, the processor 110 can control the inverter circuit 14 in the charging management module 140 to convert direct current into alternating current and output it to the first coil 103. The first coil 103 converts the alternating current into an alternating magnetic field, thereby wirelessly charging the wireless keyboard.

[0351] The first through-hole is a reserved through-hole for laying out a first device of the electronic device, such as a flash, a TOF sensor, or a camera module. Various configurations of the first coil 103 can be found in the relevant descriptions in the above embodiments, and will not be repeated here.

[0352] Refer to Figure 26 for a schematic diagram of the wireless keyboard. The wireless keyboard may include a processor 218, a memory 216, a charging interface 213, a charging management module 212, a second coil 203, a second battery 21, a Bluetooth module 219, a touchpad 215, and a keyboard 217, etc.

[0353] The processor 218, memory 216, charging interface 215, charging management module 212, second battery 21, touchpad 215, and keyboard 217 mentioned above can all be mounted on the keyboard body of the wireless keyboard. The second coil 203 is mounted on the stand of the wireless keyboard.

[0354] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the wireless keyboard. In other embodiments, the wireless keyboard may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0355] The memory 216 can be used to store program code, and it can also store a Bluetooth address that uniquely identifies the wireless keyboard. Additionally, the memory 216 can store connection data of electronic devices that have been successfully paired with the wireless keyboard before. For example, this connection data can be the Bluetooth address of an electronic device that has been successfully paired with the wireless keyboard. Based on this connection data, the wireless keyboard can automatically pair with the electronic device without having to repeatedly configure the connection, such as performing authentication again. The aforementioned Bluetooth address can be a media access control (MAC) address.

[0356] The processor 218 can be used to execute the aforementioned application code and call relevant modules to implement the functions of the wireless keyboard in this application embodiment. For example, it can implement wireless charging and wireless communication functions. The processor 218 may include one or more processing units, which can be independent devices or integrated into one or more processors 218. Specifically, the processor 218 may be an integrated control chip or a circuit comprising various active and / or passive components, configured to perform the functions of the processor 218 described in this application embodiment. The processor of the wireless keyboard may be a microprocessor.

[0357] Bluetooth module 219 is used for Bluetooth communication between other electronic devices. In some embodiments, Bluetooth module 219 may include a Bluetooth chip. The wireless keyboard may be a Bluetooth keyboard. The wireless keyboard can pair and establish a wireless connection with the Bluetooth chips of other electronic devices through the Bluetooth chip.

[0358] In some embodiments, the wireless keyboard 20 can also support wired charging. Specifically, the charging management module 212 can receive charging input from a wired charger through the charging interface 213.

[0359] In other embodiments, the wireless keyboard may also support wireless charging by other components (such as a wireless charger) or devices (such as electronic devices like tablets). The rectifier circuit 23 and the second charging control module 24 in Figure 3 may be integrated into the charging management module 212.

[0360] The charging management module 212 charges the second battery 21 while simultaneously powering the wireless keyboard. The charging management module 212 receives input from the second battery 21 and powers the processor 218, memory 216, and Bluetooth module 219. The charging management module 212 can also monitor parameters of the second battery 21, such as battery capacity, battery cycle count, and battery health status (leakage, impedance), and sends corresponding communication information to connected electronic devices via the Bluetooth module 219 to inform the electronic devices of the current battery parameter information. In some other embodiments, the charging management module 212 may also be located within the processor 218.

[0361] Storage compartment 214 can be used to store styluses.

[0362] The touchpad 215 integrates a touch sensor. The processor 218 can receive control commands and input information through the touchpad 215 and the keyboard 217.

[0363] It is understood that the structure illustrated in the embodiments of this application does not constitute a specific limitation on the wireless keyboard. It may have more or fewer components than shown, may combine two or more components, or may have different component configurations. For example, the outer surface of the wireless keyboard may also include buttons, indicator lights (which can indicate battery level, incoming / outgoing calls, pairing mode, etc.), and a display screen (which can display relevant information to the user). The buttons may be physical buttons or touch buttons (used in conjunction with a touch sensor), used to trigger operations such as power on / off, start charging, and stop charging.

[0364] The location and arrangement of the second coil 203 and the through hole on the wireless keyboard can be found in the descriptions in the above embodiments, and will not be repeated here. When the electronic device wirelessly charges the wireless keyboard, the first coil and the second coil are aligned, specifically meaning that the projections of the first coil and the second coil on the plane of the back cover coincide, and the plane of the first coil and the plane of the second coil are parallel to ensure high wireless charging efficiency.

[0365] The wireless charging system provided in this application reuses the opening area reserved on the back cover of the electronic device for a first device to house the first coil. The first device is one that needs to transmit light or sense external light, thus requiring a through-hole to prevent the back cover from obstructing it. By reusing the first through-hole, it is no longer necessary to create separate openings in other parts of the back cover to house the first coil. This allows the electronic device to have wireless charging functionality while using a relatively complete metal back cover, improving the strength and aesthetics of the back cover. Furthermore, when using the technical solution of this application, the electronic device can also use a back cover made of non-metallic materials such as glass, ceramic, or plastic. In this case, since the projection of the first coil onto the plane of the back cover is located within the area of ​​the first through-hole, the back cover no longer obstructs the transmitting coil. This also improves the coupling efficiency between the first coil and the receiving coil on the wireless keyboard when the electronic device is charging the wireless keyboard, thereby improving the efficiency of wireless charging.

[0366] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0367] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments.

Claims

1. An electronic device, characterized in that, The electronic device includes: a rear shell, a first component, and a first coil; The rear shell includes a first through hole, which is used to house the first device. The projection of the first coil onto the plane of the rear housing lies within the area of ​​the first through hole; The first coil is used to generate an alternating magnetic field.

2. The electronic device according to claim 1, characterized in that, The first device is the flash of the electronic device; or, the first device is the time-of-flight (TOF) sensor of the electronic device.

3. The electronic device according to claim 2, characterized in that, The first coil surrounds the first device.

4. The electronic device according to any one of claims 1-3, characterized in that, The first through-hole is also used to house the first camera module of the electronic device.

5. The electronic device according to claim 4, characterized in that, The electronic device further includes a first shielding layer, which is made of a metallic material; The first shielding layer is located below the first camera module.

6. The electronic device according to claim 5, characterized in that, The first shielding layer is a metal material layer or the first shielding layer is a metal coil.

7. The electronic device according to claim 5 or 6, characterized in that, The electronic device further includes a third circuit board, wherein the first camera module is disposed on a first surface of the third circuit board; The first shielding layer is disposed on the second surface of the third circuit board.

8. The electronic device according to any one of claims 2-7, characterized in that, The rear cover also includes a second through hole for arranging the second camera module of the electronic device.

9. The electronic device according to claim 8, characterized in that, The electronic device further includes a second shielding layer, which is made of a metallic material; The second shielding layer is located below the second camera module.

10. The electronic device according to claim 9, characterized in that, The second shielding layer is a metal material layer or the second shielding layer is a metal coil.

11. The electronic device according to claim 9 or 10, characterized in that, The electronic device further includes a fourth circuit board, and the second camera module is disposed on a first surface of the fourth circuit board; The second shielding layer is disposed on the second surface of the fourth circuit board.

12. The electronic device according to claim 6 or 10, characterized in that, The first end of the metal coil is connected to the second end of the metal coil.

13. The electronic device according to claim 2, characterized in that, The electronic device further includes a first circuit board and a second circuit board; The first coil is disposed on the first surface of the first circuit board; The first device is disposed on the second circuit board; The first circuit board is located between the second circuit board and the rear shell; The first surface of the first circuit board is fixed to the rear shell.

14. The electronic device according to claim 2, characterized in that, The electronic device also includes a first circuit board, a second circuit board, and a limiting component; The first coil is disposed on the first surface of the first circuit board; The first device is disposed on the second circuit board; The first circuit board is located between the second circuit board and the rear shell; The first surface of the first circuit board is fixed to the limiting component; The limiting component is used to prevent the first coil from detaching from the first through hole after it is assembled with the rear shell.

15. The electronic device according to claim 2, characterized in that, The electronic device further includes a first circuit board, a second circuit board, a first soft magnetic material layer, and a limiting component; The first coil is disposed on the first surface of the first soft magnetic material layer; The second surface of the first soft magnetic material layer is fixed to the first surface of the first circuit board; The first device is disposed on the second circuit board; The first circuit board is located between the second circuit board and the rear shell; The first surface of the first circuit board is fixed to the limiting component; The limiting component is used to prevent the first coil from detaching from the first through hole after it is assembled with the rear shell.

16. The electronic device according to claim 1, characterized in that, The first coil stops working when any one of the rear camera modules of the electronic device is working, and the rear camera module is arranged in the reserved through hole of the rear shell.

17. The electronic device according to claim 16, characterized in that, The electronic device also includes a processor; The processor is used to obtain the identifier of the currently activated camera module. When it is determined from the identifier that the currently activated camera module is the rear camera module, the processor controls the first coil to stop working.

18. The electronic device according to any one of claims 1-17, characterized in that, The rear shell is a metal rear shell.

19. A wireless keyboard, characterized in that, The wireless keyboard includes: a second coil, a keyboard body, and a support structure; The bracket structure fits against the back cover of the electronic device when the wireless keyboard is closed; The bracket structure includes a third through hole, which is used to prevent the bracket structure from obstructing the first device of the electronic device when the bracket structure is attached to the back cover of the electronic device. The second coil surrounds the third through hole; The second coil is used to generate alternating current using an alternating magnetic field.

20. The wireless keyboard according to claim 19, characterized in that, The first device is the flash of the electronic device; or, the first device is the time-of-flight (TOF) sensor of the electronic device.

21. The wireless keyboard according to claim 19, characterized in that, The third through hole is also used to prevent the bracket structure from obstructing the first camera module of the electronic device when the bracket structure is attached to the back cover of the electronic device.

22. The wireless keyboard according to claim 19 or 20, characterized in that, The bracket structure also includes a fourth through hole, which is used to prevent the bracket structure from obstructing the first camera module of the electronic device when the bracket structure is attached to the back cover of the electronic device.

23. The wireless keyboard according to claim 21, characterized in that, The bracket structure also includes a fifth through hole, which is used to prevent the bracket structure from obstructing the second camera module of the electronic device when the bracket structure is attached to the back cover of the electronic device.

24. The wireless keyboard according to any one of claims 19-23, characterized in that, The wireless keyboard further includes: a second soft magnetic material layer; The second coil is disposed on the second soft magnetic material layer, and when the bracket structure is attached to the back cover of the electronic device, the second coil is located between the back cover of the electronic device and the second soft magnetic material layer.

25. A wireless charging system, characterized in that, The system includes the electronic device according to any one of claims 1-18, and further includes the wireless keyboard according to any one of claims 19-24; When the back cover of the electronic device is in contact with the support structure of the wireless keyboard, the electronic device wirelessly charges the wireless keyboard.

26. The wireless charging system according to claim 25, characterized in that, When the electronic device wirelessly charges the wireless keyboard, the first coil and the second coil are aligned.

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