Foldable electronic device

Abstract

The invention provides foldable electronic equipment. A first rotating body comprises a first circuit board; the second rotating body comprises a second circuit board; the ultrasonic assembly comprises a first ultrasonic sensor and a second ultrasonic sensor, the first ultrasonic sensor is electrically connected with the first circuit board, the second ultrasonic sensor is electrically connected with the second circuit board, the first ultrasonic sensor is used for transmitting a first ultrasonic signal, and the second ultrasonic sensor is used for receiving the first ultrasonic signal; the second ultrasonic sensor is used for transmitting a second ultrasonic signal, the first ultrasonic sensor is used for receiving the second ultrasonic signal, and the frequency band of the first ultrasonic signal is different from that of the second ultrasonic signal; the first ultrasonic sensor and the second ultrasonic sensor are used for signal transmission between the first circuit board and the second circuit board on the two sides of the rotating shaft, the size of the flexible FPC stretching across the rotating shaft is reduced, or arrangement of the flexible FPC is omitted, the stacking width of devices is increased, and more devices can be placed on the auxiliary board side.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a foldable electronic device. Background Art

[0002] With the widespread use of foldable electronic devices such as foldable phones, the circuit boards on both sides of the folded electronic device use flexible FPCs to achieve signal transmission. The flexible FPCs transmit a wide variety of signals. To avoid signal interference, a certain degree of isolation or physical spacing is required. This results in the flexible FPCs needing to be relatively large in size, which in turn leads to a large space occupation during flexible FPC layout. When stacking devices, the width is limited, making it impossible to place more devices on the sub-board side, thus limiting the functionality of the entire device. Therefore, how to provide a compatible signal transmission and reduce the size of the flexible FPC has become a technical problem that needs to be solved. Summary of the Invention

[0003] The present application provides a foldable electronic device that is compatible with signal transmission while reducing the size of a flexible FPC or eliminating the need to set up a flexible FPC.

[0004] In a first aspect, the present application provides a foldable electronic device, comprising:

[0005] A first rotating body including a first circuit board;

[0006] A second rotating body including a second circuit board;

[0007] a rotating shaft connected between the first rotating body and the second rotating body;

[0008] An ultrasonic component includes a first ultrasonic sensor and a second ultrasonic sensor, wherein the first ultrasonic sensor is electrically connected to the first circuit board, and the second ultrasonic sensor is electrically connected to the second circuit board. The first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal. The frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal.

[0009] The embodiment of the present application provides a foldable electronic device, wherein the first rotating body includes a first circuit board; the second rotating body includes a second circuit board; the rotating shaft is connected between the first rotating body and the second rotating body; the ultrasonic component includes a first ultrasonic sensor and a second ultrasonic sensor, the first ultrasonic sensor is electrically connected to the first circuit board, the second ultrasonic sensor is electrically connected to the second circuit board, the first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal, the frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal, the first ultrasonic sensor and the second ultrasonic sensor are used for signal transmission between the first circuit board and the second circuit board on both sides of the rotating shaft in the foldable electronic device, so as to be compatible with signal transmission while reducing the size of the flexible FPC across the rotating shaft, or eliminating the flexible FPC across the rotating shaft, increasing the device stacking width, so that more devices can be placed on the sub-board side, and increasing the function of the whole machine.

[0010] In a second aspect, the present application provides a foldable electronic device, comprising:

[0011] The first rotating body includes a main control chip;

[0012] The second rotating body includes a touch control unit and a display drive control unit;

[0013] a rotating shaft connected between the first rotating body and the second rotating body;

[0014] A display screen, the display screen being provided on the first rotating body and the second rotating body; or the display screen being provided on the second rotating body;

[0015] A touch layer is provided in the display screen, and the touch layer is electrically connected to the touch control unit;

[0016] An ultrasonic component includes a first ultrasonic sensor and a second ultrasonic sensor, wherein the first ultrasonic sensor is electrically connected to the main control chip, the first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal, the frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal, the first ultrasonic signal includes at least part of the display control signal, the second ultrasonic sensor is electrically connected to the touch control unit, and the second ultrasonic signal includes at least part of the touch signal; or, the second ultrasonic sensor is electrically connected to the display drive control unit, and the second ultrasonic signal includes at least part of the display drive control signal.

[0017] The foldable electronic device provided in the embodiment of the present application comprises a first rotating body including a main control chip; a second rotating body including a touch control unit and a display drive control unit; a rotating shaft connected between the first rotating body and the second rotating body; a display screen is provided on the first rotating body and / or the second rotating body; a touch layer is provided in the display screen, and the touch layer is electrically connected to the touch control unit; an ultrasonic component comprises a first ultrasonic sensor and a second ultrasonic sensor, the first ultrasonic sensor is electrically connected to the main control chip, the first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal, and the first ultrasonic signal The frequency band is different from the frequency band of the second ultrasonic signal, the first ultrasonic signal includes at least part of the display control signal, the second ultrasonic sensor is electrically connected to the touch control unit, and the second ultrasonic signal includes at least part of the touch signal; or, the second ultrasonic sensor is electrically connected to the display drive control unit, and the second ultrasonic signal includes at least part of the display drive control signal. The first ultrasonic sensor and the second ultrasonic sensor are used for signal transmission between the main control chip and the touch control unit or the display drive control unit on both sides of the rotating shaft of the foldable electronic device, so as to reduce the size of the flexible FPC while being compatible with signal transmission, or cancel the setting of the flexible FPC, increase the device stacking width, enable more devices to be placed on the sub-board side, and increase the function of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments.

[0019] Figure 1 This is a schematic structural diagram of a first foldable electronic device provided in an embodiment of the present application;

[0020] Figure 2 This is a schematic structural diagram of a first foldable electronic device provided in an embodiment of the present application;

[0021] Figure 3 This is a schematic structural diagram of a first foldable electronic device provided in an embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structural decomposition of a first foldable electronic device provided in an embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 3 ;

[0026] Figure 8 is a schematic diagram of a partial structure of a foldable electronic device in a folded state provided by an embodiment of the present application;

[0027] Figure 9 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 4 ;

[0028] Figure 10 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 5 ;

[0029] Figure 11 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 6 ;

[0030] Figure 12 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 7 ;

[0031] Figure 13 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 8 ;

[0032] Figure 14 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 9 ;

[0033] Figure 15 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 10 ;

[0034] Figure 16 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 10 one;

[0035] Figure 17 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 10 two;

[0036] Figure 18 This is a schematic diagram of the local structure of the foldable electronic device in the unfolded state provided by the embodiment of the present application Figure 10 three.

[0037] Description of Figure Numbers:

[0038] Foldable electronic device 1000; first rotating body 310; rotating shaft 330; second rotating body 320; first display screen 210; back cover 400; second display screen 220; ultrasonic component 100; first ultrasonic sensor 110; second ultrasonic sensor 120; first ultrasonic transmitter 111; first ultrasonic receiver 112; second ultrasonic transmitter 121; second ultrasonic receiver 122; first filter 113; second filter 123; first flexible circuit board 510; second flexible circuit board 520; first BTB connector 540; second BTB connector 550; signal transmission hole 331; metal reflective layer 332; first reflective wall 333; second reflective wall 334; main control chip 610; first display driver chip 810; third flexible circuit board 530; second display driver chip 820; touch layer 230; touch control unit 830; sensor control unit 840; rotating shaft control unit 850; camera control unit 860. DETAILED DESCRIPTION

[0039] The technical solution of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments, not all embodiments. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0040] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to mutually exclusive, independent, or alternative embodiments to other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] The terms "first," "second," and so on, in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a component or device comprising one or more parts is not limited to the one or more parts listed, but may optionally include one or more parts that are not listed but are inherent to the illustrated product, or one or more parts that should be present based on the described functionality.

[0042] See also Figure 1-Figure 3 , Figure 1-Figure 31 is a schematic diagram of the structure of a foldable electronic device 1000 provided in an embodiment of the present application. Foldable electronic device 1000 includes, but is not limited to, foldable mobile phones, foldable tablet computers, foldable laptop computers, foldable computers, foldable wearable devices, and other devices with communication functions. This embodiment of the present application uses a foldable mobile phone as an example; other electronic devices can refer to this embodiment.

[0043] See also Figure 1-Figure 3 The foldable electronic device 1000 includes a first rotating body 310, a rotating shaft 330, and a second rotating body 320 connected in sequence. Specifically, the first rotating body 310 and the second rotating body 320 are rotatably connected via the rotating shaft 330.

[0044] See also Figure 1-Figure 3 The foldable electronic device 1000 further includes a first display screen 210 and a back cover 400 .

[0045] In an optional implementation, see Figure 1 The foldable electronic device 1000 is a small foldable mobile phone, and the hinge 330 is arranged along the width direction of the foldable electronic device 1000. The first display screen 210 includes but is not limited to a flexible screen such as a foldable screen or a curved screen, and the back cover is two parts connected to both sides of the hinge 330.

[0046] In another optional embodiment, the foldable electronic device 1000 is a multi-folding mobile phone, and this application uses two folding parts as an example to illustrate.

[0047] In another optional embodiment, please refer to Figure 2 The foldable electronic device 1000 is a large foldable mobile phone, and the rotating shaft 330 is arranged along the length direction of the foldable electronic device 1000.

[0048] For example, the first display screen 210 includes but is not limited to a flexible screen such as a folding screen and a curved screen, and the back cover is two parts connected to both sides of the hinge 330.

[0049] For another example, see Figure 3 The first display screen 210 is a folding screen, and the foldable electronic device 1000 also includes a second display screen 220.

[0050] The first display screen 210 is disposed on one side of the first rotating body 310 and the second rotating body 320. Specifically, the first display screen 210 is disposed on the side of the foldable frame 300 when it is unfolded. The back cover 400 is disposed on the side of the first rotating body 310 facing away from the first display screen 210, and the second display screen 220 is disposed on the side of the second rotating body 320 facing away from the first display screen 210. This embodiment will be used as an example for illustration below.

[0051] Optionally, the first display screen 210 includes but is not limited to a flexible screen such as a folding screen or a curved screen. The second display screen 220 can be called a secondary screen. The second display screen 220 can be a hard screen or a flexible screen.

[0052] Please also refer to Figure 3 and Figure 4 , Figure 4 yes Figure 3 A partially exploded schematic diagram of a foldable electronic device 1000 is provided.

[0053] The first rotating body 310 includes a first circuit board 600 and other components. A space is formed between the first display screen 210, the first rotating body 310, and the back cover 400 to accommodate components such as the first circuit board 600 (also called the main board), the camera module, the receiver module, the battery 700, and various sensors. Therefore, the side where the first rotating body 310 is located can also be referred to as the main board side.

[0054] The second rotating body 320 includes a second circuit board 800 and other components. A storage space is formed between the first display screen 210, the second rotating body 320, and the second display screen 220 to accommodate the second circuit board 800 (also called a sub-board), various sensors, and other components. Therefore, the side where the second rotating body 320 is located can also be referred to as the sub-screen side.

[0055] The first rotating body 310 and the second rotating body 320 have an unfolded state and a folded state. The first rotating body 310 and the second rotating body 320 rotate along the length direction or the width direction of the foldable electronic device 1000 to the unfolded state or the folded state. Figure 3 The rotating shaft 330 is along the length direction of the foldable electronic device 1000.

[0056] See also Figure 5 The first rotating body 310 includes a first top frame 321a, a first side frame 322 and a first bottom frame 324a.

[0057] See also Figure 5 The second rotating body 320 includes a second bottom frame 324b, a second side frame 323, and a second top frame 321b.

[0058] Optionally, the first top frame 321a and the second top frame 321b are respectively arranged on both sides of the rotating shaft 330 and are rotatably connected through the rotating shaft 330. When the foldable electronic device 1000 is in a folded state, the first top frame 321a and the second top frame 321b are opposite to each other and spaced apart along the thickness direction of the foldable electronic device 1000. When the foldable electronic device 1000 is in an unfolded state, the first top frame 321a and the second top frame 321b are collinearly arranged.

[0059] See also Figure 5 The extension directions of the first side frame 322 and the second side frame 323 are both parallel to the length direction of the foldable electronic device 1000.

[0060] See also Figure 5 The first bottom frame 324a and the second bottom frame 324b are respectively provided on either side of the rotating shaft 330 and are rotatably connected via the rotating shaft 330. The first bottom frame 324a and the second bottom frame 324b are arranged opposite each other and spaced apart along the thickness direction of the foldable electronic device 1000 when the foldable electronic device 1000 is in the folded state. The first bottom frame 324a and the second bottom frame 324b are arranged collinearly when the foldable electronic device 1000 is in the unfolded state.

[0061] For the convenience of description, the width direction of the foldable electronic device 1000 in the unfolded state is defined as the X-axis direction, the length direction is defined as the Y-axis direction, and the thickness direction is defined as the Z-axis direction.

[0062] A foldable electronic device 1000 is provided in a first embodiment of the present application.

[0063] See also Figure 5 , the foldable electronic device 1000 also includes an ultrasonic component 100.

[0064] See also Figure 5 The ultrasonic component 100 includes a first ultrasonic sensor 110 and a second ultrasonic sensor 120 .

[0065] The first ultrasonic sensor 110 is electrically connected to the first circuit board 600 . The second ultrasonic sensor 120 is electrically connected to the second circuit board 800 .

[0066] Specifically, a first electronic device is provided on the first circuit board 600, and the first ultrasonic sensor 110 can be electrically connected to the first electronic device, either directly or indirectly. This application does not specifically limit the first electronic device. A second electronic device is provided on the second circuit board 800, and the second ultrasonic sensor 120 can be electrically connected to the second electronic device, either directly or indirectly. This application does not specifically limit the second electronic device.

[0067] Alternatively, the first electronic device may not be disposed on the first circuit board 600, and the first ultrasonic sensor 110 may be directly or indirectly electrically connected to the first electronic device. The second electronic device may not be disposed on the second circuit board 800, and the second ultrasonic sensor 120 may be directly or indirectly electrically connected to the second electronic device.

[0068] The first ultrasonic sensor 110 is used to transmit a first ultrasonic signal (eg Figure 5 The first ultrasonic sensor 110 is used to receive the second ultrasonic signal transmitted by the second ultrasonic sensor 120.

[0069] The second ultrasonic sensor 120 is used to transmit a second ultrasonic signal (such as Figure 5 The second ultrasonic sensor 120 is used to receive the first ultrasonic signal transmitted by the first ultrasonic sensor 110.

[0070] The first ultrasonic signal includes but is not limited to at least one of a display driving control signal, a touch signal, a sensor signal, a rotating shaft 330 driving control signal, a camera signal, and the like.

[0071] The second ultrasonic signal includes but is not limited to at least one of a display drive control signal, a touch signal, a sensor signal, a rotation shaft 330 drive control signal, a camera signal, and the like.

[0072] The frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal to achieve frequency band isolation, thereby improving the efficiency of the second ultrasonic sensor 120 receiving the signal transmitted by the first ultrasonic sensor 110; improving the efficiency of the first ultrasonic sensor 110 receiving the signal transmitted by the second ultrasonic sensor 120; and preventing the signal transmitted by the first ultrasonic sensor 110 from being received by itself, thereby reducing the amount of signal transmitted by the first ultrasonic sensor 110 received by the second ultrasonic sensor 120, leading to problems such as electrical signal omission and reduced signal transmission efficiency. Similarly, preventing the signal transmitted by the second ultrasonic sensor 120 from being received by itself reduces the amount of signal transmitted by the second ultrasonic sensor 120 received by the first ultrasonic sensor 110, leading to problems such as electrical signal omission and reduced signal transmission efficiency.

[0073] For example, the frequency range of the first ultrasonic signal includes 25-30 KHz, and the frequency range of the second ultrasonic signal includes 35-40 KHz.

[0074] For another example, the frequency range of the first ultrasonic signal includes 20-25 KHz, and the frequency range of the second ultrasonic signal includes 25-30 KHz.

[0075] Generally, a flexible FPC is used to transmit electrical signals on both sides of the hinge 330 of the foldable electronic device 1000. However, since the flexible FPC needs to transmit a relatively large number of signal types, in order to avoid interference between signals, for example, the high-frequency characteristics (>800MHz) of the MIPI DSI signal in the display driver control unit can easily interfere with the sensor analog signal through electromagnetic coupling, resulting in inaccurate sensor detection signals and other problems; the high-frequency signal (frequency >800MHz) of the display driver control unit (such as MIPI DSI) can be coupled to the touch IC through space radiation or FPC traces, causing touch coordinate drift or false touches; The high-current transient switching of the OLED driver chip (DDIC) (such as HBM voltage > 15V) will affect the touch IC reference level through the common ground path, causing problems such as touch sampling baseline drift. Physical spacing isolation or complex shielding structure needs to be designed on the flexible FPC, which leads to a relatively large size of the flexible FPC. Because the flexible FPC needs to span the first rotating body 310, the rotating shaft 330 and the second rotating body 320, the flexible FPC occupies a large space in the foldable electronic device 1000 and affects the stacking setting of other devices, so that fewer other electronic devices can be set on the secondary screen side.

[0076] In the foldable electronic device 1000 provided in an embodiment of the present application, the first rotating body 310 includes a first circuit board 600; the second rotating body 320 includes a second circuit board 800; the rotating shaft 330 is connected between the first rotating body 310 and the second rotating body 320; the ultrasonic component 100 includes a first ultrasonic sensor 110 and a second ultrasonic sensor 120, the first ultrasonic sensor 110 is electrically connected to the first circuit board 600, the second ultrasonic sensor 120 is electrically connected to the second circuit board 800, the first ultrasonic sensor 110 is used to transmit a first ultrasonic signal, and the second ultrasonic sensor 120 is used to receive the first ultrasonic signal; the second ultrasonic sensor 120 is used to transmit a second ultrasonic signal, and the first ultrasonic sensor 110 is used to transmit a second ultrasonic signal. In receiving the second ultrasonic signal, the frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used for signal transmission between the first circuit board 600 and the second circuit board 800 on both sides of the rotating shaft 330 in the foldable electronic device 1000. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to realize signal transmission of at least one of the display drive control signal, touch signal, sensor signal, rotating shaft 330 drive control signal, camera signal, etc. on the circuit boards on both sides of the rotating shaft 330, so as to reduce the size of the flexible FPC while being compatible with signal transmission, or eliminate the setting of the flexible FPC, increase the device stacking width, enable more devices to be placed on the sub-board side, and increase the function of the whole machine.

[0077] The specific structure of the ultrasonic component 100 is described below with reference to the accompanying drawings.

[0078] See also Figure 6 The first ultrasonic sensor 110 includes a first ultrasonic transmitter 111 and a first ultrasonic receiver 112 .

[0079] The first ultrasonic transmitter 111 is configured to transmit the first ultrasonic signal.

[0080] The first ultrasonic receiver 112 is configured to receive the second ultrasonic signal.

[0081] The first ultrasonic sensor 110 includes a first ultrasonic transmitter 111, a first ultrasonic receiver 112, a first ultrasonic controller, and a first ultrasonic power supply. The first ultrasonic transmitter 111 includes a transmitter and a transducer. The transducer includes a piezoelectric chip. The transducer can convert the energy generated by the vibration of the piezoelectric chip when it is excited by voltage into ultrasonic waves, and the transmitter transmits the generated ultrasonic waves. The first ultrasonic receiver 112 includes a transducer and an amplifier circuit. The transducer receives ultrasonic waves and converts them into electrical energy. The amplifier circuit then amplifies the generated electrical signal. The first ultrasonic controller controls the entire operating system, including transmitting and receiving ultrasonic waves and determining whether the received ultrasonic waves include the ultrasonic waves it transmitted. The first ultrasonic power supply provides power to the entire system. The operating frequency of the first ultrasonic sensor 110 is the resonant frequency of the piezoelectric chip.

[0082] In addition, the working principle of the first ultrasonic sensor 110 includes the following stages:

[0083] Emission phase: The transducer inside the sensor generates mechanical vibration under the stimulation of the electrical signal, thereby emitting ultrasonic waves.

[0084] Propagation stage: The emitted ultrasonic wave propagates in the medium and is reflected when encountering an obstacle.

[0085] Receiving phase: The sensor receives the ultrasonic signal.

[0086] Processing stage: Process and analyze the received signal to obtain the required information.

[0087] See also Figure 6 The second ultrasonic sensor 120 includes a second ultrasonic transmitter 121 and a second ultrasonic receiver 122 .

[0088] The second ultrasonic transmitter 121 is configured to transmit the second ultrasonic signal.

[0089] The second ultrasonic receiver 122 is configured to receive the first ultrasonic signal.

[0090] The specific structure of the second ultrasonic sensor 120 may refer to the specific structure of the first ultrasonic sensor 110 .

[0091] In this embodiment, a first ultrasonic sensor 110 is provided, including a first ultrasonic transmitter 111 and a first ultrasonic receiver 112; a second ultrasonic sensor 120 is provided, including a second ultrasonic transmitter 121 and a second ultrasonic receiver 122. The first ultrasonic transmitter 111 is used to transmit the first ultrasonic signal, and the first ultrasonic receiver 112 is used to receive the second ultrasonic signal. The second ultrasonic transmitter 121 is used to transmit the second ultrasonic signal, and the second ultrasonic receiver 122 is used to receive the first ultrasonic signal. By providing two sets of ultrasonic transmitters and ultrasonic receivers, some functions of the traditional flexible FPC can be replaced, and the electronic signals required for communication between the main board and the sub-board (or between the electronic devices on both sides of the rotating shaft 330) can be converted into ultrasonic signals for communication. Moreover, when communicating through acoustic wave signals, there is no need to consider the bending life of the flexible FPC, and there will be no problem of functional failure caused by broken wires.

[0092] For further optional information, see Figure 7 The first ultrasonic sensor 110 further includes a first filter 113. The first filter 113 is electrically connected to the first ultrasonic receiver 112. The first filter 113 is configured to filter out signals outside the frequency band of the second ultrasonic signal, thereby improving the purity of the signal received by the first ultrasonic receiver 112 and reducing interference from frequencies outside the second ultrasonic signal on the second ultrasonic signal, thereby enabling decoding of a more accurate signal. The first filter 113 can also filter out the first ultrasonic signal to prevent the signal transmitted by the first ultrasonic transmitter 111 from being received by the first ultrasonic receiver 112.

[0093] See also Figure 7 The second ultrasonic sensor 120 further includes a second filter 123. The second filter 123 is electrically connected to the second ultrasonic receiver 122. The second filter 123 is configured to filter out signals outside the frequency band of the first ultrasonic signal, thereby improving the purity of the signal received by the second ultrasonic receiver 122 and reducing interference from frequency bands outside the first ultrasonic signal on the first ultrasonic signal, thereby enabling decoding of a more accurate signal. The second filter 123 can also filter out the second ultrasonic signal to prevent the signal transmitted by the second ultrasonic transmitter 121 from being received by the second ultrasonic receiver 122.

[0094] The following describes an example of the connection between the first ultrasonic sensor 110 and the first circuit board 600 with reference to the accompanying drawings.

[0095] The first ultrasonic sensor 110 is disposed outside the first circuit board 600. Specifically, the first ultrasonic sensor 110 is disposed outside the area where the first circuit board 600 is located. In other words, the first ultrasonic sensor 110 is spaced apart from the first circuit board 600.

[0096] See also Figure 6 and Figure 7 The foldable electronic device 1000 also includes a first flexible circuit board 510 .

[0097] The first flexible circuit board 510 electrically connects the first circuit board 600 and the first ultrasonic sensor 110. Furthermore, the first flexible circuit board 510 is electrically connected to the first circuit board 600 and the first ultrasonic sensor 110 via a first BTB connector. Specifically, the male connector of the first BTB connector is provided on the first circuit board 600, while the female connector of the first BTB connector is fixed to one end of the first flexible circuit board 510. The other end of the first flexible circuit board 510 is electrically connected to the first ultrasonic sensor 110. This electrical connection includes, but is not limited to, integrating the first ultrasonic sensor 110 with the other end of the first flexible circuit board 510.

[0098] Since the first ultrasonic sensor 110 generates mechanical waves of a certain frequency (e.g., 23-40 kHz), there will be some micro-vibrations on the first circuit board 600 (e.g., the micro-motor in the folding phone, or the movement in the camera, or the movement of the diaphragm of the speaker transmitted to the mainboard). In order to prevent the micro-vibrations on the first circuit board 600 from affecting the operation of the first ultrasonic sensor 110, the first ultrasonic sensor 110 is arranged in an area outside the first circuit board 600, and the first circuit board 600 and the first ultrasonic sensor 110 are electrically connected through the first flexible circuit board 510, which not only realizes the transmission of electrical signals between the first circuit board 600 and the first ultrasonic sensor 110, but also avoids the problem of reduced signal transmission accuracy caused by the vibration interference of the first circuit board 600 to the first ultrasonic sensor 110.

[0099] The connection between the second ultrasonic sensor 120 and the second circuit board 800 is described below with reference to the accompanying drawings.

[0100] See also Figure 6 and Figure 7 The foldable electronic device 1000 further includes a second flexible circuit board 520. Specifically, the second ultrasonic sensor 120 is disposed outside the area where the second circuit board 800 is located. In other words, the second ultrasonic sensor 120 is spaced apart from the second circuit board 800.

[0101] The second flexible circuit board 520 electrically connects the second circuit board 800 and the second ultrasonic sensor 120. Furthermore, the second flexible circuit board 520 is electrically connected to the second circuit board 800 and the second ultrasonic sensor 120 via a second BTB connector. Specifically, the male connector of the second BTB connector is located on the second circuit board 800, while the female connector of the second BTB connector is fixed to one end of the second flexible circuit board 520. The other end of the second flexible circuit board 520 is electrically connected to the second ultrasonic sensor 120. This electrical connection includes, but is not limited to, integrating the second ultrasonic sensor 120 with the other end of the second flexible circuit board 520.

[0102] Since the second ultrasonic sensor 120 generates mechanical waves of a certain frequency (e.g., 23-40 kHz), there will be some micro-vibrations on the second circuit board 800 (e.g., the micro-motor in the folding phone, or the movement in the camera, or the movement of the diaphragm of the speaker transmitted to the mainboard). In order to prevent the micro-vibrations on the second circuit board 800 from affecting the operation of the second ultrasonic sensor 120, the second ultrasonic sensor 120 is arranged in an area outside the second circuit board 800, and the second circuit board 800 and the second ultrasonic sensor 120 are electrically connected through the second flexible circuit board 520, which not only realizes the transmission of electrical signals between the second circuit board 800 and the second ultrasonic sensor 120, but also avoids the problem of reduced signal transmission accuracy caused by the vibration interference of the second circuit board 800 to the second ultrasonic sensor 120.

[0103] Taking the first circuit board 600 as the main board and the second circuit board 800 as the sub-board, the process of signal interaction between the first circuit board 600, the first ultrasonic sensor 110, the second ultrasonic sensor 120 and the second circuit board 800 is as follows:

[0104] See also Figure 6 and Figure 7 Regarding data transmission, the mainboard's data is connected to the first ultrasonic transmitter 111 via the first BTB connector 540 and the first flexible circuit board 510. The sub-board's data is connected to the second ultrasonic transmitter 121 via the second BTB connector 550 and the second flexible circuit board 520. The first and second ultrasonic transmitters 111 and 121 encode the data, attaching the electronic signal to an ultrasonic wave before transmitting it into the air. The ultrasonic signal transmitted by the first ultrasonic sensor 110 has a frequency between 20 and 25 kHz, while the ultrasonic signal transmitted by the second ultrasonic sensor 120 has a frequency between 25 and 30 kHz.

[0105] For data reception, the first ultrasonic receiver 112 connected to the main board receives 25-30 kHz ultrasonic signals in the air, decodes them into electronic signals, and transmits them to the main board via the first flexible printed circuit board 510 and the first BTB connector 540. The second ultrasonic receiver 122 connected to the sub-board receives 20-25 kHz ultrasonic signals in the air, decodes them into electronic signals, and transmits them to the sub-board via the second flexible printed circuit board 520 and the second BTB connector 550.

[0106] The positions of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are described below with reference to the accompanying drawings.

[0107] For the first optional implementation, please refer to Figure 5 The first ultrasonic sensor 110 is disposed in the first rotating body 310. The first ultrasonic sensor 110 is disposed adjacent to the rotating shaft 330. The first ultrasonic sensor 110 is disposed closely to the rotating shaft 330.

[0108] See also Figure 5 The second ultrasonic sensor 120 is disposed in the second rotating body 320. The second ultrasonic sensor 120 is disposed adjacent to the rotating shaft 330. The second ultrasonic sensor 120 is disposed closely to the rotating shaft 330.

[0109] In this embodiment, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are both disposed adjacent to the rotating shaft 330, thereby shortening the distance between the first ultrasonic sensor 110 and the second ultrasonic sensor 120. To prevent ultrasonic signal loss due to reflection, no other devices or structures are typically disposed between the first ultrasonic sensor 110 and the second ultrasonic sensor 120, i.e., the space between the first ultrasonic sensor 110 and the second ultrasonic sensor 120 is vacant. In this embodiment, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are both disposed adjacent to the rotating shaft 330, thereby minimizing the loss of ultrasonic signals during transmission.

[0110] See also Figure 5 , the rotating shaft 330 has a signal transmission hole 331.

[0111] When the foldable electronic device 1000 is in the unfolded state, the signal transmission hole 331 extends through the rotation axis 330 along a first direction. The first ultrasonic sensor 110, the signal transmission hole 331, and the second ultrasonic sensor 120 are arranged sequentially along the first direction. Optionally, the first direction may be perpendicular to or intersect the direction along which the rotation axis 330 extends. In this embodiment, the first direction is perpendicular to the direction along which the rotation axis 330 extends.

[0112] The first ultrasonic signal emitted by the first ultrasonic sensor 110 is received by the second ultrasonic sensor 120 through the signal transmission hole 331 .

[0113] The second ultrasonic signal emitted by the second ultrasonic sensor 120 is received by the first ultrasonic sensor 110 through the signal transmission hole 331 .

[0114] Specifically, the first ultrasonic sensor 110 is disposed near one end opening of the signal transmission hole 331, and the first ultrasonic sensor 110 transmits and receives signals toward the one end opening of the signal transmission hole 331. The second ultrasonic sensor 120 is disposed near the other end opening of the signal transmission hole 331, and the second ultrasonic sensor 120 transmits and receives signals toward the other end opening of the signal transmission hole 331.

[0115] See also Figure 8 When the foldable electronic device 1000 is in the folded state, the first ultrasonic signal emitted by the first ultrasonic sensor 110 is reflected by a portion of the wall of the signal transmission hole 331 and is received by the second ultrasonic sensor 120. The second ultrasonic signal emitted by the second ultrasonic sensor 120 is reflected by a portion of the wall of the signal transmission hole 331 and is received by the first ultrasonic sensor 110, thereby reducing signal interference between the first and second ultrasonic signals during transmission.

[0116] Further, see Figure 8 The wall of the signal transmission hole 331 is provided with a metal reflective layer 332. The metal reflective layer 332 includes, but is not limited to, at least one of gold, silver, copper, etc. The metal reflective layer 332 can increase the reflectivity of the ultrasonic signal.

[0117] When the foldable electronic device 1000 is in a folded state, the first ultrasonic signal emitted by the first ultrasonic sensor 110 is reflected by the metal layer on the hole wall of the signal transmission hole 331 and is received by the second ultrasonic sensor 120 .

[0118] The second ultrasonic signal emitted by the second ultrasonic sensor 120 is reflected by the metal layer on the hole wall of the signal transmission hole 331 and is received by the first ultrasonic sensor 110 .

[0119] In this embodiment, the hinge 330 includes a signal transmission hole 331, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are respectively located at the openings of the signal transmission hole 331. This allows the first ultrasonic signal emitted by the first ultrasonic sensor 110 to be received by the second ultrasonic sensor 120 via the signal transmission hole 331, and the second ultrasonic signal emitted by the second ultrasonic sensor 120 to be received by the first ultrasonic sensor 110 via the signal transmission hole 331 when the foldable electronic device 1000 is unfolded. Furthermore, by providing a metal reflective layer 332 on the walls of the signal transmission hole 331, when the foldable electronic device 1000 is folded, the first ultrasonic signal emitted by the first ultrasonic sensor 110 is reflected by a portion of the walls of the signal transmission hole 331 and received by the second ultrasonic sensor 120. The second ultrasonic signal emitted by the second ultrasonic sensor 120 is reflected by a portion of the walls of the signal transmission hole 331 and received by the first ultrasonic sensor 110, thereby reducing signal interference between the first and second ultrasonic signals during transmission. This ensures that the two ultrasonic sensors can transmit signals in both the unfolded and folded states with minimal interference during transmission.

[0120] Further, see Figure 8 The rotating shaft 330 includes a first reflecting wall 333 and a second reflecting wall 334. The first reflecting wall 333 is located on a side close to the first rotating body 310. The second reflecting wall 334 is located on a side close to the second rotating body 320. The first reflecting wall 333 and the second reflecting wall 334 are arranged to intersect.

[0121] See also Figure 8 The first reflective wall 333 and the second reflective wall 334 are both provided with or are the aforementioned metal reflective layer 332 .

[0122] When the foldable electronic device 1000 is in the unfolded state, the second reflective wall 334 and the first reflective wall 333 are located outside the signal transmission hole 331 .

[0123] For example, the angle between the plane of the first reflective wall 333 and the plane of the first rotating body 310 is approximately 45°, and the angle between the plane of the second reflective wall 334 and the plane of the first reflective wall 333 is approximately 90°. The angle between the plane of the second reflective wall 334 and the plane of the second rotating body 320 is approximately 45°. The first reflective wall 333 and the second reflective wall 334 form a V-shape. In other words, the signal transmission hole 331 is arranged along the height direction with the first reflective wall 333 and the second reflective wall 334.

[0124] When the foldable electronic device 1000 is in a folded state, the first reflective wall 333 and the second reflective wall 334 both serve as partial walls of the signal transmission hole 331 .

[0125] Specifically, when the first rotating body 310 and the second rotating body 320 are stacked, the signal transmission hole 331 is divided into two roughly U-shaped or V-shaped parts, and the first reflecting wall 333 and the second reflecting wall 334 are arranged at the bottom of the U-shaped or V-shaped signal transmission hole 331.

[0126] The first ultrasonic signal emitted by the first ultrasonic sensor 110 is reflected by the first reflective wall 333 and the second reflective wall 334 in sequence before being directed toward the second ultrasonic sensor 120. The second ultrasonic signal emitted by the second ultrasonic sensor 120 is reflected by the second reflective wall 334 and the first reflective wall 333 in sequence before being directed toward the first ultrasonic sensor 110.

[0127] For the second optional implementation, please refer to Figure 9 The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are disposed in the rotating shaft 330. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are spaced apart and opposite to each other along the axial direction of the rotating shaft 330.

[0128] Specifically, the first ultrasonic sensor 110 is disposed within the rotating shaft 330 and electrically connected to the BTB connector on the first circuit board 600 via the first flexible circuit board 510. The second ultrasonic sensor 120 is disposed within the rotating shaft 330 and electrically connected to the BTB connector on the second circuit board 800 via the second flexible circuit board 520. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are axially opposed to each other, with a spacing of 0.5 cm to 7 cm. Furthermore, the axial spacing between the first ultrasonic sensor 110 and the second ultrasonic sensor 120 is 2 cm to improve the accuracy of ultrasonic signal transmission.

[0129] In this embodiment, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are both disposed within the rotating shaft 330, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are spaced apart and arranged opposite to each other along the axial direction of the rotating shaft 330. In this way, the relative positions of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 do not change with changes in the state of the foldable electronic device 1000, so that the first ultrasonic sensor 110 and the second ultrasonic sensor 120 can perform stable electrical signal transmission whether the foldable electronic device 1000 is in the unfolded state or the folded state.

[0130] For a third alternative implementation, see Figure 10 The first ultrasonic sensor 110 is disposed within the first rotating body 310. The second ultrasonic sensor 120 is disposed within the rotating shaft 330. The rotating shaft 330 has a signal transmission hole 331. The first ultrasonic sensor 110 is designed with one end adjacent to the signal transmission hole 331 open, and the second ultrasonic sensor 120 is disposed within the signal transmission hole 331.

[0131] When the foldable electronic device 1000 is in the unfolded state and the folded state, the first ultrasonic sensor 110, the signal transmission hole 331, and the second ultrasonic sensor 120 are arranged in sequence along a first direction. The first ultrasonic signal emitted by the first ultrasonic sensor 110 is received by the second ultrasonic sensor 120 via the signal transmission hole 331. The second ultrasonic signal emitted by the second ultrasonic sensor 120 is received by the first ultrasonic sensor 110 via the signal transmission hole 331.

[0132] Optionally, the first direction may be perpendicular to or intersect the extending direction of the rotation axis 330. In this embodiment, the first direction is perpendicular to the extending direction of the rotation axis 330.

[0133] In this embodiment, the first ultrasonic sensor 110 is disposed within the first rotating body 310. The second ultrasonic sensor 120 is disposed within the rotating shaft 330. The rotating shaft 330 has a signal transmission hole 331. The first ultrasonic sensor 110 is designed with one end adjacent to the signal transmission hole 331 open, and the second ultrasonic sensor 120 is disposed within the signal transmission hole 331. This ensures that the relative positions of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 do not change with changes in the state of the foldable electronic device 1000. This allows for stable electrical signal transmission between the first ultrasonic sensor 110 and the second ultrasonic sensor 120, whether the foldable electronic device 1000 is in the unfolded or folded state.

[0134] For the fourth optional implementation, please refer to Figure 11 The first ultrasonic sensor 110 is disposed within the rotating shaft 330. The second ultrasonic sensor 120 is disposed within the second rotating body 320. The rotating shaft 330 has a signal transmission hole 331. The second ultrasonic sensor 120 is designed to have an opening at the other end adjacent to the signal transmission hole 331, and the first ultrasonic sensor 110 is disposed within the signal transmission hole 331.

[0135] When the foldable electronic device 1000 is in the unfolded state and the folded state, the first ultrasonic sensor 110, the signal transmission hole 331, and the second ultrasonic sensor 120 are arranged in sequence along a first direction. The first ultrasonic signal emitted by the first ultrasonic sensor 110 is received by the second ultrasonic sensor 120 via the signal transmission hole 331. The second ultrasonic signal emitted by the second ultrasonic sensor 120 is received by the first ultrasonic sensor 110 via the signal transmission hole 331.

[0136] Optionally, the first direction may be perpendicular to or intersect the extending direction of the rotation axis 330. In this embodiment, the first direction is perpendicular to the extending direction of the rotation axis 330.

[0137] In this embodiment, the first ultrasonic sensor 110 is disposed within the rotating shaft 330. The second ultrasonic sensor 120 is disposed within the second rotating body 320. The rotating shaft 330 has a signal transmission hole 331. The second ultrasonic sensor 120 is designed to be open at the other end adjacent to the signal transmission hole 331, and the first ultrasonic sensor 110 is disposed within the signal transmission hole 331. This ensures that the relative positions of the first and second ultrasonic sensors 110, 120 do not change with changes in the state of the foldable electronic device 1000. This allows for stable electrical signal transmission between the first and second ultrasonic sensors 110, 120, whether the foldable electronic device 1000 is in the unfolded or folded state.

[0138] The following describes an example of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 being used to transmit the display driving control signal.

[0139] For the first optional implementation, please refer to Figure 12 The foldable electronic device 1000 further includes a first display screen 210. The first display screen 210 is disposed on the first rotating body 310, the rotating shaft 330, and the second rotating body 320. The first circuit board 600 includes a main control chip 610. The first ultrasonic sensor 110 is electrically connected to the main control chip 610.

[0140] The second circuit board 800 includes a first display driver chip 810. Optionally, the second circuit board 800 includes but is not limited to a flexible circuit board electrically connected to the first display screen 210.

[0141] The first display driver chip 810 is disposed in the space surrounded by the first display screen 210 and the second rotating body 320. In other words, the first display driver chip 810 and the main control chip 610 are located on both sides of the rotating shaft 330, respectively.

[0142] The first display driver chip 810 is electrically connected to the first display screen 210. The second ultrasonic sensor 120 is electrically connected to the first display driver chip 810. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit at least part of the display control signal of the first display screen 210.

[0143] The display control signal includes, but is not limited to, a gate drive signal and a display data drive signal. Optionally, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are configured to transmit the gate drive signal. The gate drive signal includes a clock signal. The display data drive signal corresponds to the display brightness value of each pixel unit.

[0144] On the one hand, the gate drive signal has relatively low requirements for voltage accuracy compared to the display data drive signal. For example, the gate drive signal is a high level, and the voltage range of the high level can be 4.5V to 5.5V; the voltage range of the low level can be 0V to 1.5V. Therefore, the embodiment of the present application transmits the gate drive signal through an ultrasonic sensor, without providing relatively high data transmission accuracy, and can also provide a new signal transmission method for the gate drive signal. For example, the aforementioned first ultrasonic signal is used to load the gate drive signal, and the first ultrasonic sensor 110 is electrically connected to the clock control module of the main control chip 610, thereby reducing the metal traces that need to be designed on the flexible circuit board for transmitting the gate drive signal, thereby reducing the size of the flexible circuit board, and reducing the interference between the gate drive signal and the display data drive signal.

[0145] Further, see Figure 12 The foldable electronic device 1000 further includes a third flexible circuit board 530. The third flexible circuit board 530 is electrically connected between the first circuit board 600 and the second circuit board 800. The third flexible circuit board 530 is spaced apart from the ultrasonic assembly 100. The third flexible circuit board 530 can be used to transmit display data drive signals, ensuring the accuracy of the display data drive signals while also physically isolating the transmission paths of the display data drive signals from the gate drive signals, thereby reducing interference between the gate drive signals and the display data drive signals.

[0146] Optional, see Figure 3 The foldable electronic device 1000 also includes the second display screen 220.

[0147] See also Figure 3 and Figure 13The second display screen 220 is disposed on a side of the second rotating body 320 facing away from the first display screen 210. The second circuit board 800 also includes a second display driver chip 820. Optionally, the second circuit board 800 further includes, but is not limited to, a flexible circuit board for electrically connecting to the second display screen 220. The second display screen 220 driver chip is electrically connected to the second display screen 220. The second ultrasonic sensor 120 is electrically connected to the second display screen 220 driver chip. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit at least a portion of the display control signal for the second display screen 220.

[0148] The second display driver chip 820 is located in the space enclosed by the second display screen 220 and the second rotating body 320. In other words, the second display driver chip 820 and the main control chip 610 are located on either side of the rotating shaft 330. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit the gate drive signal within the display control signal of the second display screen 220. For details, please refer to the above description.

[0149] Generally, the first display screen 210 and the second display screen 220 work in a time-sharing manner, so the first ultrasonic sensor 110 and the second ultrasonic sensor 120 can transmit the gate drive signal of the first display screen 210 and the gate drive signal of the second display screen 220 in a time-sharing manner. In this way, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 can be multiplexed as the gate drive signal transmission channels of the first display screen 210 and the second display screen 220.

[0150] The following describes an example of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 being used to transmit touch signals.

[0151] For the second optional implementation, please refer to Figure 2 and Figure 14 The foldable electronic device 1000 further includes a display screen and a touch layer 230 disposed within the display screen. The display screen is disposed on the first rotating body 310 and the second rotating body 320; alternatively, the display screen is disposed on the second rotating body 320. The touch control unit is electrically connected to the touch layer 230.

[0152] The display screen includes the aforementioned first display screen 210 and / or the aforementioned second display screen 220. For example, the display screen is the aforementioned first display screen 210, and the display screen is disposed on the first rotating body 310 and the second rotating body 320. For example, the display screen is the aforementioned second display screen 220, and the display screen is disposed on the second rotating body 320. For example, the display screen is the aforementioned first display screen 210 and the second display screen 220, and the display screen is disposed on the second rotating body 320 and the first rotating body 310.

[0153] The first circuit board 600 includes a main control chip 610 . The first ultrasonic sensor 110 is electrically connected to the main control chip 610 .

[0154] See also Figure 2 and Figure 14 The second circuit board 800 includes a touch control unit 830. The second circuit board 800 includes but is not limited to a driving board at the edge of the flexible OLED module.

[0155] The touch control unit 830 is disposed in the space enclosed by the display screen and the second rotating body 320. The touch control unit 830 is electrically connected to the touch layer 230. The second ultrasonic sensor 120 is electrically connected to the touch control unit 830. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are configured to transmit at least a portion of the touch signal of the touch layer 230. The touch signal includes, but is not limited to, touch coordinate data (including X / Y axis coordinate values, converted into a digital signal via capacitance change), action type signals (including status indicators such as click, long press, and slide), and pressure / gesture data.

[0156] The touch layer 230 forms a capacitive sensor, and the touch control unit 830 includes a processor and an AD converter. When a user touches the screen with a finger or a special pen, the touch layer 230 will collect the capacitance value obtained by the finger or pen and transmit the collected signal to the touch control unit 830. The touch control unit 830 will convert these digital signals into analog signals with coordinate and motion recognition functions, and then transmit them to the second ultrasonic sensor 120. The second ultrasonic sensor 120 transmits them to the main control chip 610 through the first ultrasonic sensor 110. The main control chip 610 generates corresponding gate drive signals and display data drive signals based on the received touch signals, and transmits them to the display driver chip through the first ultrasonic sensor 110 and the second ultrasonic sensor 120, and finally displays them on the display screen.

[0157] Since touch detection relies on capacitance change threshold judgment, it only needs to identify the touch point coordinate range (error allowed is ±0.5mm), and there is no need to achieve micron-level positioning accuracy. Therefore, the aforementioned touch signal can be transmitted through the first ultrasonic sensor 110 and the second ultrasonic sensor 120.

[0158] Furthermore, high-frequency signals (typically >800MHz) in the display control signal can couple to the touch control unit 830 via spatial radiation or FPC traces, causing touch coordinate drift or false touches. Alternatively, mechanical deformation in the folding screen hinge 330 area can exacerbate changes in the parasitic capacitance of the signal line, potentially reducing the touch signal signal-to-noise ratio (SNR) by more than 30%. Based on the above issues, it is necessary to isolate the display control signal from the touch signal.

[0159] This embodiment provides a new method for transmitting touch signals, namely, transmitting touch signals between the main control chip 610 and the touch control unit 830 through the first ultrasonic sensor 110 and the second ultrasonic sensor 120. Furthermore, the display control signal can be set on the third flexible circuit board 530 or other ultrasonic sensor pairs to improve the isolation between the display control signal and the touch signal, thereby preventing the high-frequency signal in the display control signal from affecting the touch coordinate drift or false touch. Since the touch signal is transmitted in the form of an ultrasonic signal and no longer transmitted through a signal line, the signal-to-noise ratio of the touch signal will not decrease with the mechanical shape of the hinge 330 area.

[0160] The following describes an example of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 being used to transmit sensor signals.

[0161] For a third alternative implementation, see Figure 15 The foldable electronic device 1000 further includes a sensor. The sensor is disposed on the second rotating body 320.

[0162] The sensor includes but is not limited to at least one of a gravity sensor, an acceleration sensor, a Hall sensor, and the like.

[0163] The first circuit board 600 includes a main control chip 610 . The first ultrasonic sensor 110 is electrically connected to the main control chip 610 .

[0164] The second circuit board 800 includes a sensor control unit 840. The sensor control unit 840 is electrically connected to the second ultrasonic sensor 120. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are configured to transmit at least a portion of the sensor signals of the sensors.

[0165] Since the high-frequency signal (>800MHz) in the display control signal can easily interfere with the analog signal in the sensor signal through electromagnetic coupling, it will cause sensor detection errors.

[0166] This embodiment provides a new method for transmitting touch signals, namely, transmitting sensor signals between the main control chip 610 and the sensor control unit 840 through the first ultrasonic sensor 110 and the second ultrasonic sensor 120. Furthermore, the display control signal can be set on the third flexible circuit board 530 or other ultrasonic sensor pairs to improve the isolation between the display control signal and the sensor signal, so as to avoid the high-frequency signal in the display control signal interfering with the analog signal in the sensor signal through electromagnetic coupling, resulting in sensor detection errors.

[0167] The following describes an example of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 being used to transmit the driving control signal of the rotating shaft 330 .

[0168] For the fourth optional implementation, please refer to Figure 16 The first rotating body 310 and the second rotating body 320 are driven to fold or unfold by electric means.

[0169] The first circuit board 600 includes a main control chip 610 . The first ultrasonic sensor 110 is electrically connected to the main control chip 610 .

[0170] See also Figure 16 The second circuit board 800 includes a hinge control unit 850. The hinge control unit 850 is electrically connected to a motor, etc. The hinge control unit 850 is disposed on the hinge 330. The motor is used to drive at least a portion of the hinge 330 to rotate, thereby driving the foldable electronic device 1000 to a folded state or an unfolded state.

[0171] The rotating shaft control unit 850 is electrically connected to the second ultrasonic sensor 120. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit at least part of the driving control signal of the rotating shaft 330.

[0172] Because the transient fluctuation of the drive current of the shaft control unit 850 (peak value > 500mA) interferes with the sensor ADC sampling accuracy through the common ground path, it is necessary to isolate the drive control signal from the sensor signal.

[0173] This embodiment provides a new method for transmitting touch signals, namely, transmitting the shaft 330 control signal between the main control chip 610 and the shaft control unit 850 through the first ultrasonic sensor 110 and the second ultrasonic sensor 120. Furthermore, the sensor can be set on the third flexible circuit board 530 or on other ultrasonic sensor pairs to improve the isolation between the shaft 330 control signal and the sensor signal, so as to avoid transient fluctuations in the driving current in the shaft 330 control signal affecting the sensor signal.

[0174] The following describes an example of the first ultrasonic sensor 110 and the second ultrasonic sensor 120 being used to transmit camera signals.

[0175] In the fifth optional implementation, please refer to Figure 17 The foldable electronic device 1000 further includes a camera module. The camera module is disposed on the second rotating body 320.

[0176] See also Figure 17 The first circuit board 600 includes a main control chip 610. The first ultrasonic sensor 110 is electrically connected to the main control chip 610.

[0177] See also Figure 17 The second circuit board 800 includes a camera control unit 860. The camera control unit 860 is electrically connected to the second ultrasonic sensor 120. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit at least part of the control signal of the camera.

[0178] Because the MIPI CSI camera data transmission rate (>5Gbps) in the camera control signal overlaps with the DSI signal spectrum in the display control signal, image noise or frame loss may occur. Based on the above problems, it is necessary to isolate the display control signal from the camera control signal.

[0179] This embodiment provides a new method for transmitting camera control signals, namely, transmitting the camera control signals between the main control chip 610 and the camera control unit 860 through the first ultrasonic sensor 110 and the second ultrasonic sensor 120. Furthermore, the display control signal can be set on the third flexible circuit board 530 or other ultrasonic sensor pairs to improve the isolation between the display control signal and the camera control signal, so as to avoid the overlap of the MIPICSI camera data transmission rate in the camera control signal and the DSI signal spectrum in the display control signal, which may cause image noise or frame loss.

[0180] See also Figure 17The foldable electronic device 1000 further includes a third flexible circuit board 530. The third flexible circuit board 530 is electrically connected between the first circuit board 600 and the second circuit board 800. The third flexible circuit board 530 is spaced apart from the ultrasonic assembly 100. The third flexible circuit board 530 and the ultrasonic assembly 100 are respectively used to transmit at least two of the following: a display drive control unit, a touch signal, a sensor signal, a hinge 330 drive control signal, a camera signal, and an enable signal.

[0181] In an optional embodiment, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit gate driving signals, and the third flexible printed circuit board 530 is used to transmit display data driving signals.

[0182] In an optional embodiment, the third flexible printed circuit board 530 is used to transmit display driving control signals, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit touch signals.

[0183] In an optional embodiment, the third flexible printed circuit board 530 is used to transmit the display driving control signal, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit the sensor signal.

[0184] In an optional embodiment, the third flexible circuit board 530 is used to transmit the display driving control signal, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit the rotating shaft 330 driving control signal.

[0185] In an optional embodiment, the third flexible circuit board 530 is used to transmit the display driving control signal, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit the camera signal.

[0186] In an optional embodiment, the third flexible circuit board 530 is used to transmit the driving control signal of the rotating shaft 330 , and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to transmit sensor signals.

[0187] In the foldable electronic device 1000 provided in an embodiment of the present application, the first rotating body 310 includes the first circuit board 600; the second rotating body 320 includes the second circuit board 800; the rotating shaft 330 is connected between the first rotating body 310 and the second rotating body 320; the ultrasonic component 100 includes a first ultrasonic sensor 110 and a second ultrasonic sensor 120, the first ultrasonic sensor 110 is electrically connected to the first circuit board 600, the second ultrasonic sensor 120 is electrically connected to the second circuit board 800, the first ultrasonic sensor 110 is used to transmit a first ultrasonic signal, and the second ultrasonic sensor 120 is used to receive the first ultrasonic signal; the second ultrasonic sensor 120 is used to transmit a second ultrasonic signal, and the first ultrasonic sensor 110 is used to transmit a second ultrasonic signal. Used to receive a second ultrasonic signal, the frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal, the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used for signal transmission between the first circuit board 600 and the second circuit board 800 on both sides of the rotating shaft 330 in the foldable electronic device 1000, and the first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used to realize signal transmission of at least one of the display drive control signal, touch signal, sensor signal, rotating shaft 330 drive control signal, camera signal, etc. on the circuit boards on both sides of the rotating shaft 330, so as to reduce the size of the flexible FPC while being compatible with signal transmission, or cancel the setting of the flexible FPC, increase the device stacking width, enable more devices to be placed on the sub-board side, and increase the function of the whole machine.

[0188] See also Figure 18 The second embodiment of the present application provides a foldable electronic device 1000. The foldable electronic device 1000 includes the first rotating body 310, the second rotating body 320, the rotating shaft 330, and the display screen (such as Figure 2 The aforementioned first display screen 210 or the aforementioned second display screen 220 ), a touch layer 230 , and an ultrasonic component 100 .

[0189] The first rotating body 310 includes a main control chip 610 .

[0190] The second rotating body 320 includes a touch control unit 830 and a display driver control unit (such as the aforementioned first display driver chip 810 and / or the aforementioned second display driver chip 820 ).

[0191] The rotating shaft 330 is connected between the first rotating body 310 and the second rotating body 320 .

[0192] When the display screen is the aforementioned first display screen 210 or the display screen includes the aforementioned first display screen 210 and the aforementioned second display screen 220, the display screen is arranged on the first rotating body 310 and the second rotating body 320; or, when the display screen is the aforementioned second display screen 220, the display screen is arranged on the second rotating body 320.

[0193] The touch layer 230 is disposed in the display screen and is electrically connected to the touch control unit 830 .

[0194] The ultrasonic component 100 includes a first ultrasonic sensor 110 and a second ultrasonic sensor 120. The first ultrasonic sensor 110 is electrically connected to the main control chip 610. The first ultrasonic sensor 110 is used to transmit a first ultrasonic signal. The second ultrasonic sensor 120 is used to receive the first ultrasonic signal. The second ultrasonic sensor 120 is used to transmit a second ultrasonic signal. The first ultrasonic sensor 110 is used to receive the second ultrasonic signal. The frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal. The first ultrasonic signal includes at least part of the display control signal. The second ultrasonic sensor 120 is electrically connected to the touch control unit 830. The second ultrasonic signal includes at least part of the touch signal; or, the second ultrasonic sensor 120 is electrically connected to the display drive control unit. The second ultrasonic signal includes at least part of the display drive control signal.

[0195] The specific structures, connection relationships, positional relationships, and electrical connection relationships of the first rotating body 310, the second rotating body 320, the rotating shaft 330, the display screen, the touch layer 230, and the ultrasonic component 100 in this embodiment can all refer to the specific structures, connection relationships, positional relationships, and electrical connection relationships of the first rotating body 310, the second rotating body 320, the rotating shaft 330, the display screen, the touch layer 230, and the ultrasonic component 100 in Example 1.

[0196] Display control signals include, but are not limited to, gate drive signals and display data drive signals. For example, the first ultrasonic signal includes a gate drive signal. The gate drive signal includes a clock signal. Compared to the display data drive signal, the gate drive signal has relatively lower voltage precision requirements. For example, the gate drive signal is a high level, and the voltage range of the high level can be 4.5V to 5.5V; the voltage range of the low level can be 0V to 1.5V. Therefore, the embodiments of the present application transmit gate drive signals through ultrasonic sensors, eliminating the need for relatively high data transmission accuracy and providing a new signal transmission method for gate drive signals. For example, the aforementioned first ultrasonic signal is used to carry the gate drive signal, and the first ultrasonic sensor 110 is electrically connected to the clock control module of the main control chip 610. This reduces the number of metal traces required to transmit the gate drive signal on the flexible circuit board, thereby reducing the size of the flexible circuit board and reducing interference between the gate drive signal and the display data drive signal. The third flexible circuit board 530 can be used to transmit the display data drive signal, ensuring the accuracy of the display data drive signal while physically isolating the transmission paths of the display data drive signal and the gate drive signal, reducing interference between the gate drive signal and the display data drive signal.

[0197] The second ultrasonic signal includes at least a portion of a touch signal, which includes, but is not limited to, touch coordinate data (including X / Y axis coordinate values, converted into digital signals by capacitance change), action type signals (including state indicators such as click, long press, and slide), and pressure / gesture data.

[0198] Since touch detection relies on capacitance change threshold judgment, it only needs to identify the touch point coordinate range (error allowed is ±0.5mm), and there is no need to achieve micron-level positioning accuracy. Therefore, the aforementioned touch signal can be transmitted through the first ultrasonic sensor 110 and the second ultrasonic sensor 120.

[0199] Furthermore, high-frequency signals (typically >800MHz) in the display control signal can couple to the touch control unit 830 via spatial radiation or FPC traces, causing touch coordinate drift or false touches. Alternatively, mechanical deformation in the folding screen hinge 330 area can exacerbate changes in the parasitic capacitance of the signal line, potentially reducing the touch signal signal-to-noise ratio (SNR) by more than 30%. Based on the above issues, it is necessary to isolate the display control signal from the touch signal.

[0200] This embodiment provides a novel method for transmitting touch signals, namely, transmitting gate drive signals and touch signals within display control signals via the first ultrasonic sensor 110 and the second ultrasonic sensor 120. Furthermore, the display data drive signal within the display control signals can be placed on the third flexible printed circuit board 530 or another pair of ultrasonic sensors to improve isolation between the display data drive signal and the gate drive signal, and between the display data drive signal and the touch signal. By setting the frequency bands of the first ultrasonic signal and the second ultrasonic signal to be different, the isolation between the gate drive signal and the touch signal is improved, preventing high-frequency signals within the display control signal from affecting touch coordinate drift or false touches. Because the touch signal is transmitted via ultrasonic signals, rather than signal lines, the touch signal signal-to-noise ratio does not decrease with the mechanical deformation of the hinge 330 area. This also allows the width of the third flexible printed circuit board 530, which spans the hinge 330, to be shortened, reducing the area occupied by the third flexible printed circuit board 530.

[0201] In embodiments where the second ultrasonic sensor 120 is electrically connected to the touch control unit 830 and the second ultrasonic signal includes at least a portion of a touch signal, the foldable electronic device 1000 further includes a third flexible circuit board 530. The third flexible circuit board 530 is electrically connected between the main control chip 610 and the display driver control unit (such as the aforementioned first display driver chip 810 and / or the aforementioned second display driver chip 820). The third flexible circuit board 530 is used to transmit at least a portion of the display driver control signal.

[0202] In the foldable electronic device 1000 provided in an embodiment of the present application, the first rotating body 310 includes a main control chip 610; the second rotating body 320 includes a touch control unit 830 and a display drive control unit; the rotating shaft 330 is connected between the first rotating body 310 and the second rotating body 320; the display screen is provided on the first rotating body 310 and / or the second rotating body 320; the touch layer 230 is provided in the display screen, and the touch layer 230 is electrically connected to the touch control unit 830; the ultrasonic component 100 includes a first ultrasonic sensor 110 and a second ultrasonic sensor 120, the first ultrasonic sensor 110 is electrically connected to the main control chip 610, the first ultrasonic sensor 110 is used to transmit a first ultrasonic signal, and the second ultrasonic sensor 120 is used to receive the first ultrasonic signal; the second ultrasonic sensor 120 is used to transmit a second ultrasonic signal, and the first ultrasonic sensor 110 is used to receive the first ultrasonic signal. The sensor 110 is used to receive a second ultrasonic signal. The frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal. The first ultrasonic signal includes at least part of the display control signal. The second ultrasonic sensor 120 is electrically connected to the touch control unit 830, and the second ultrasonic signal includes at least part of the touch signal; or, the second ultrasonic sensor 120 is electrically connected to the display drive control unit, and the second ultrasonic signal includes at least part of the display drive control signal. The first ultrasonic sensor 110 and the second ultrasonic sensor 120 are used for signal transmission between the main control chip 610 and the touch control unit 830 or the display drive control unit on both sides of the rotating shaft 330 in the foldable electronic device 1000, so as to reduce the size of the flexible FPC while being compatible with signal transmission, or cancel the setting of the flexible FPC, increase the device stacking width, enable more devices to be placed on the sub-board side, and increase the function of the whole machine.

[0203] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A foldable electronic device, characterized in that: include: A first rotating body including a first circuit board; A second rotating body including a second circuit board; a rotating shaft connected between the first rotating body and the second rotating body; and An ultrasonic component includes a first ultrasonic sensor and a second ultrasonic sensor, wherein the first ultrasonic sensor is electrically connected to the first circuit board, and the second ultrasonic sensor is electrically connected to the second circuit board. The first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal. The frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal.

2. The foldable electronic device according to claim 1, wherein: The first ultrasonic sensor includes a first ultrasonic transmitter and a first ultrasonic receiver, the first ultrasonic transmitter is used to transmit the first ultrasonic signal, and the first ultrasonic receiver is used to receive the second ultrasonic signal; The second ultrasonic sensor includes a second ultrasonic transmitter and a second ultrasonic receiver. The second ultrasonic transmitter is used to transmit the second ultrasonic signal, and the second ultrasonic receiver is used to receive the first ultrasonic signal.

3. The foldable electronic device according to claim 1, wherein: The foldable electronic device also includes a first flexible circuit board and a second flexible circuit board. The first flexible circuit board electrically connects the first circuit board and the first ultrasonic sensor, and the first ultrasonic sensor is arranged outside the first circuit board; the second flexible circuit board electrically connects the second circuit board and the second ultrasonic sensor, and the second ultrasonic sensor is arranged outside the second circuit board.

4. The foldable electronic device according to any one of claims 1 to 3, wherein: The first ultrasonic sensor is disposed in the first rotating body, and the first ultrasonic sensor is disposed adjacent to the rotating shaft; the second ultrasonic sensor is disposed in the second rotating body, and the second ultrasonic sensor is disposed adjacent to the rotating shaft; The rotating shaft has a signal transmission hole; When the foldable electronic device is in an unfolded state, the signal transmission hole passes through the rotating shaft along a first direction, the first ultrasonic sensor, the signal transmission hole, and the second ultrasonic sensor are arranged in sequence along the first direction, a first ultrasonic signal emitted by the first ultrasonic sensor is received by the second ultrasonic sensor via the signal transmission hole; and a second ultrasonic signal emitted by the second ultrasonic sensor is received by the first ultrasonic sensor via the signal transmission hole. When the foldable electronic device is in a folded state, the first ultrasonic signal emitted by the first ultrasonic sensor is reflected by part of the hole wall of the signal transmission hole and received by the second ultrasonic sensor; the second ultrasonic signal emitted by the second ultrasonic sensor is reflected by part of the hole wall of the signal transmission hole and received by the first ultrasonic sensor.

5. The foldable electronic device according to claim 4, wherein: The rotating shaft includes a first reflecting wall and a second reflecting wall, wherein the first reflecting wall is located on a side close to the first rotating body, and the second reflecting wall is located on a side close to the second rotating body, and the first reflecting wall and the second reflecting wall are intersecting. When the foldable electronic device is in an unfolded state, the second reflective wall and the first reflective wall are located outside the signal transmission hole; When the foldable electronic device is in a folded state, the first reflecting wall and the second reflecting wall both serve as partial hole walls of the signal transmission hole; the first ultrasonic signal emitted by the first ultrasonic sensor is reflected by the first reflecting wall and the second reflecting wall in sequence and then emitted to the second ultrasonic sensor, and the second ultrasonic signal emitted by the second ultrasonic sensor is reflected by the second reflecting wall and the first reflecting wall in sequence and then emitted to the first ultrasonic sensor.

6. The foldable electronic device according to claim 2, wherein: The first ultrasonic sensor further includes a first filter, the first filter being electrically connected to the first ultrasonic receiver, and the first filter being configured to filter out signals outside a frequency band of the second ultrasonic signal; The second ultrasonic sensor further includes a second filter electrically connected to the second ultrasonic receiver, and the second filter is configured to filter out signals outside a frequency band of the first ultrasonic signal.

7. The foldable electronic device according to any one of claims 1 to 3, wherein: The first ultrasonic sensor and the second ultrasonic sensor are disposed in the rotating shaft, and the first ultrasonic sensor and the second ultrasonic sensor are spaced apart and arranged opposite to each other along the axial direction of the rotating shaft.

8. The foldable electronic device according to any one of claims 1 to 3, wherein: The first ultrasonic sensor is disposed in the first rotating body, and the second ultrasonic sensor is disposed in the rotating shaft; or the first ultrasonic sensor is disposed in the rotating shaft, and the second ultrasonic sensor is disposed in the second rotating body; the rotating shaft has a signal transmission hole; When the foldable electronic device is in an unfolded state and a folded state, the first ultrasonic sensor, the signal transmission hole and the second ultrasonic sensor are arranged in sequence along a first direction, the first ultrasonic signal emitted by the first ultrasonic sensor is received by the second ultrasonic sensor through the signal transmission hole, and the second ultrasonic signal emitted by the second ultrasonic sensor is received by the first ultrasonic sensor through the signal transmission hole.

9. The foldable electronic device according to any one of claims 1 to 3, 5, and 6, wherein: The foldable electronic device further includes a first display screen, which is provided on the first rotating body, the rotating shaft, and the second rotating body. The first circuit board includes a main control chip; the first ultrasonic sensor is electrically connected to the main control chip. The second circuit board includes a first display driver chip, which is arranged in a space surrounded by the first display screen and the second rotating body. The first display screen driver chip is electrically connected to the first display screen, and the second ultrasonic sensor is electrically connected to the first display screen driver chip; the first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the display control signal of the first display screen.

10. The foldable electronic device according to claim 9, wherein: The foldable electronic device also includes a second display screen, which is arranged on the side of the second rotating body facing away from the first display screen. The second circuit board includes a second display driver chip, which is electrically connected to the second display screen, and the second ultrasonic sensor is electrically connected to the second display screen driver chip; the first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the display control signal of the second display screen.

11. The foldable electronic device according to any one of claims 1 to 3, 5, and 6, wherein: The foldable electronic device further includes a display screen and a touch layer disposed within the display screen, wherein the display screen is disposed on the first rotating body and the second rotating body; or, the display screen is disposed on the second rotating body, and the touch control unit is electrically connected to the touch layer; The first circuit board includes a main control chip; the first ultrasonic sensor is electrically connected to the main control chip; The second circuit board includes a touch control unit, which is arranged in the space surrounded by the display screen and the second rotating body. The touch control unit is electrically connected to the touch layer, and the second ultrasonic sensor is electrically connected to the touch control unit; the first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the display control signal of the touch layer.

12. The foldable electronic device according to any one of claims 1 to 3, 5, and 6, wherein: The foldable electronic device further includes a sensor, and the sensor is provided on the second rotating body; The first circuit board includes a main control chip; the first ultrasonic sensor is electrically connected to the main control chip; The second circuit board includes a sensor control unit, the sensor control unit is electrically connected to the second ultrasonic sensor, and the first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the sensor signal of the sensor.

13. The foldable electronic device according to claim 8, wherein: The first circuit board includes a main control chip; the first ultrasonic sensor is electrically connected to the main control chip; The second circuit board includes a shaft control unit, which is arranged on the shaft; the shaft control unit is electrically connected to the second ultrasonic sensor, and the first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the driving control signal of the shaft.

14. The foldable electronic device according to any one of claims 1 to 3, 5, and 6, wherein: The foldable electronic device further includes a camera module, and the camera module is disposed on the second rotating body; The first circuit board includes a main control chip; the first ultrasonic sensor is electrically connected to the main control chip; The second circuit board includes a camera control unit, which is electrically connected to the second ultrasonic sensor. The first ultrasonic sensor and the second ultrasonic sensor are used to transmit at least part of the control signal of the camera.

15. The foldable electronic device according to any one of claims 1 to 3, wherein: The foldable electronic device also includes a third flexible circuit board, which is electrically connected between the first circuit board and the second circuit board. The third flexible circuit board and the ultrasonic component are spaced apart. The third flexible circuit board and the ultrasonic component are respectively used to transmit at least two of the display drive control unit, touch signal, sensor signal, hinge drive control signal, camera signal, and enable signal.

16. A foldable electronic device, characterized in that: include: The first rotating body includes a main control chip; The second rotating body includes a touch control unit and a display drive control unit; a rotating shaft connected between the first rotating body and the second rotating body; A display screen, the display screen being provided on the first rotating body and the second rotating body; or the display screen being provided on the second rotating body; A touch layer is provided in the display screen, and the touch layer is electrically connected to the touch control unit; and An ultrasonic component includes a first ultrasonic sensor and a second ultrasonic sensor, wherein the first ultrasonic sensor is electrically connected to the main control chip, the first ultrasonic sensor is used to transmit a first ultrasonic signal, and the second ultrasonic sensor is used to receive the first ultrasonic signal; the second ultrasonic sensor is used to transmit a second ultrasonic signal, and the first ultrasonic sensor is used to receive the second ultrasonic signal, the frequency band of the first ultrasonic signal is different from the frequency band of the second ultrasonic signal, the first ultrasonic signal includes at least part of the display control signal, the second ultrasonic sensor is electrically connected to the touch control unit, and the second ultrasonic signal includes at least part of the touch signal; or, the second ultrasonic sensor is electrically connected to the display drive control unit, and the second ultrasonic signal includes at least part of the display drive control signal.

17. The foldable electronic device according to claim 16, wherein: The second ultrasonic sensor is electrically connected to the touch control unit, and the second ultrasonic signal includes at least a portion of the touch signal; The foldable electronic device further includes a third flexible circuit board, which is electrically connected between the main control chip and the display drive control unit, and is used to transmit at least part of the display drive control signal.

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