A foldable terminal

Abstract

The present disclosure relates to a folding terminal. It includes: a processor, a plurality of front camera modules and a connecting circuit. The switching module in the connecting circuit is arranged on the second flip side of the folding terminal, and the switching module includes a plurality of first signal interface sets, a second signal interface set and a second signal switching interface; a first signal channel group for connecting each first signal interface set with a camera signal interface set of the corresponding front camera module; a second signal channel group for connecting the processor signal interface set with the second signal interface set; and a signal switching channel for connecting the first signal switching interface and the second signal switching interface. The present disclosure can realize the communication connection between the processor and any front camera module through a second signal channel group, thereby effectively reducing the resource demand of the multiple front camera components on the processor and reducing the number of signal lines across the rotating shaft between the front camera components and the processor.

Description

Technical Field

[0001] The present disclosure relates to the technical field of intelligent terminals, and in particular to a foldable terminal. Background Art

[0002] With the rapid development of mobile phone technology, foldable screen mobile phones have been widely used in commercial applications. At the same time, front multi-cameras (at least including: the one located in front of the main screen) are increasingly being configured on foldable terminals (e.g., foldable mobile phones, foldable tablets, etc.) because they can bring a better photo / video experience. When a front dual-camera is set on a foldable screen terminal, the number of hinge signals increases exponentially.

[0003] However, a large number of hinge signals will increase the resource requirements and PCB layout area of ​​the folding terminal. Furthermore, a large PCB layout area may easily lead to technical problems such as a large width of the hinge FPC (Flexible Printed Circuit), reduced reliability of the entire machine and the hinge, and reduced folding times of the hinge FPC.

[0004] It can be seen that the multi-front camera circuit of the foldable terminal in the related art has technical problems such as high resource requirements and large PCB layout area. Utility Model Content

[0005] The present disclosure provides a foldable terminal to solve the deficiencies in the related art.

[0006] According to a first aspect of an embodiment of the present disclosure, a foldable terminal is provided, comprising: a processor, a plurality of front camera modules and a connection circuit;

[0007] The processor is located at the first flip side of the foldable terminal, and the processor is provided with a processor signal interface set and a first signal switching interface;

[0008] The plurality of front camera modules are located on the second flip side of the foldable terminal, each of the plurality of front camera modules is provided with a camera signal interface set, wherein the first flip side and the second flip side are foldably arranged;

[0009] The connecting circuit comprises:

[0010] A switching module, located at the second flip side of the foldable terminal, the switching module comprising a plurality of first signal interface sets, a second signal interface set and a second signal switching interface;

[0011] A plurality of first signal channel groups, each of the plurality of first signal channel groups being used to connect each first signal interface set with a camera signal interface set of a corresponding front camera module;

[0012] A second signal channel group, used to connect the processor signal interface set with the second signal interface set;

[0013] A signal switching channel is used to connect the first signal switching interface and the second signal switching interface, wherein the signal switching channel is used to transmit indication information from the processor, and the indication information is used to indicate a target signal channel group among the multiple first signal channel groups that is connected to the second signal channel group.

[0014] Optionally, the first signal channel group includes:

[0015] High-speed mipi signal channel, I2C signal channel, MCLK signal channel and reset signal channel.

[0016] Optionally:

[0017] A pull-down resistor is provided in the reset signal channel, which is used to lower the level of the reset signal channel when the front camera module connected to the reset signal channel is not enabled, so that the front camera module connected to the reset signal channel enters a reset or low power consumption state.

[0018] Optionally, the front camera module also includes a power interface; the first front camera module and the second front camera module meet similar preset voltage requirements, wherein the first front camera module and the second front camera module are two different cameras among the multiple front camera modules.

[0019] Optionally, the preset voltage similarity requirement includes: the voltage difference between the power supply voltage of the first front camera module and the power supply voltage of the second front camera module is within a preset voltage difference range; and / or, the power supply voltage of the first front camera module is within a safe voltage range of the second front camera module, and the power supply voltage of the second front camera module is within the safe voltage range of the first front camera module.

[0020] Optionally, it also includes: a power management chip and a power line group;

[0021] One end of the power line group is used to connect to the power management chip, and the other end of the power line group is used to connect in parallel to the power interface in each of the front camera modules.

[0022] Optionally, the power supply circuit group includes: an AVDD circuit, a DVSS circuit and an IOVDD circuit.

[0023] Optionally, it is characterized in that:

[0024] The power management chip is connected to the third signal interface on the processor via a target connection mode, wherein the target connection mode includes at least one of the following: SPMI, I2C or GPIO.

[0025] Optionally, the multiple front camera modules include at least: a front camera module located on the main screen side and a front camera module located on the sub-screen side.

[0026] Optionally, the resistance of the pull-down resistor is between 10Ω and 1000KΩ.

[0027] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0028] It can be seen from the above embodiments that the present disclosure sets a switching module located on the second flip side of the folding terminal, and the switching module includes multiple first signal interface sets, second signal interface sets and second signal switching interfaces; multiple first signal channel groups, each of the multiple first signal channel groups is used to connect each first signal interface set with the camera signal interface set of the corresponding front camera module, so that one switching module can be connected to multiple front camera modules; the second signal channel group is used to connect the processor signal interface set with the second signal interface set, so that the processor has the ability to connect to multiple front camera modules; a signal switching channel is also provided for connecting the first signal switching interface and the second signal switching interface; so that the signal from the The indication information of the switching channel determines the target signal channel group that is connected to the second signal channel group among multiple first signal channel groups. Since each first signal channel group is connected to a corresponding front camera module, the communication connection between the processor and any front camera module can be achieved through a second signal channel group. In addition, since the signal lines required for the signal switching channel are far less than the signal lines of the first signal channel group, under the premise that each front camera module can be enabled, the resource requirements of the multiple front camera components on the processor can be effectively reduced, and the number of signal lines across the rotating axis (i.e., across the first flip side and the second flip side) between the front camera components and the processor can be effectively reduced, thereby effectively solving the technical problems of high resource requirements and large PCB layout area of ​​the multiple front camera circuits of the folding terminal in the related art.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the circuit structure of a foldable terminal in the related art.

[0032] Figure 2 It is a schematic diagram of a circuit structure of a foldable terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present disclosure more clear, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the present disclosure and do not limit the protection scope of the present disclosure.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0035] With the rapid development of mobile phone technology, foldable screen mobile phones have been widely used in commercial applications. At the same time, front dual cameras are increasingly being configured on mobile phones because they can bring better photo / video experience. When front dual cameras are set on foldable screen mobile phones, the number of hinge signals increases exponentially.

[0036] However, a large number of hinge signals will increase the resource requirements and PCB layout area of ​​foldable screen mobile phones. Furthermore, a large PCB layout area can easily lead to technical problems such as a large hinge FPC width, reduced reliability of the entire machine and hinge, and reduced folding times of the hinge FPC.

[0037] like Figure 1In the related art shown, the camera module located on the main screen side (i.e., front camera-2 in the figure) and the camera module located on the secondary screen side (i.e., front camera-1 in the figure) are connected to their respective power interfaces and signal interfaces, respectively. Therefore, the total number of signals required across the rotating shaft FPC = 13 + 12 = 25 signals (wherein the number of cross-FPC signals corresponding to front camera-1 is 13, and the number of cross-FPC signals corresponding to front camera-2 is 12). It can be seen that the related art has the following disadvantages: a large number of signals, and a large number of resource requirements and power requirements for the processor (i.e., CPU).

[0038] Based on this, the present disclosure provides a multi-front camera connection circuit applied to a foldable terminal, which effectively reduces the resource requirements of multiple front camera components for the processor, and can effectively reduce the number of signal lines across the hinge (i.e., across the first flip side and the second flip side) between the front camera components and the processor, thereby effectively solving the technical problems of high resource requirements and large PCB layout area of ​​the multi-front camera circuit of the foldable screen mobile phone existing in the related art.

[0039] In order to better understand the multi-front camera connection circuit of the present invention, an explanation is given by using a foldable terminal to which the multi-front camera connection circuit is applied.

[0040] like Figure 2 , which is a schematic diagram of the structure of a foldable terminal shown in some embodiments.

[0041] like Figure 2As shown, in the disclosed embodiment, a folding terminal is provided, which includes: a processor 2, a plurality of camera modules 3 and a connecting circuit. The processor 2 is located on the first flip side of the folding terminal, and a processor signal interface set and a first signal switching interface are provided on the processor 2; a plurality of front camera modules 3 are located on the second flip side of the folding terminal, and each of the plurality of front camera modules 3 is provided with a camera signal interface set, wherein the first flip side and the second flip side are foldably arranged; it should be noted that the first flip side is a side provided with a main board, and the first flip side and the second flip side are located on both sides of the rotating shaft of the folding middle section, therefore, if the integrated circuit of the first flip side (for example, CPU, camera module, power management chip 4, etc.) needs to be connected to the integrated circuit of the second flip side, It is necessary to set a signal line across the rotating shaft, and in general, the signal line across the rotating shaft can be implemented by a rotating shaft FPC; the processor signal interface set can be an interface for realizing data transmission between the front camera module 3, for example, it can include: a high-speed mipi interface, a low-speed I2C interface, an MCLK interface and a reset interface; the first signal switching interface can be an interface for controlling the front camera to be enabled, and the processor 2 can send an indication information (for example, switch_control, i.e., a switching control signal) to the connection circuit through the first signal switching interface, so that the connection circuit switches between multiple front cameras according to the control signal. Multiple front camera modules 3 can be located on the same screen side, or they can be located on the main screen side or the secondary screen side respectively. For example, when the multiple front cameras include two front cameras in total, one front camera can be provided on the main screen side and one front camera can be provided on the secondary screen side respectively. When the multiple front cameras include three front cameras in total, two front cameras can be provided on the main screen side and one front camera can be provided on the secondary screen side. In addition, there can be other front camera settings, which are not listed here one by one. The main screen side is the screen formed by the screen on the first flip side and the screen on the second flip side after both the first flip side and the second flip side are opened. The secondary screen side is generally a screen located on one of the flip sides and different from the main screen side.

[0042] The connection circuit includes: a switching module 1, a plurality of first signal channel groups and a second signal channel group. The switching module 1 is located on the second flip side of the folding terminal. The switching module 1 includes a plurality of first signal interface sets, a second signal interface set and a second signal switching interface; the second signal interface set can be connected to any first signal interface set in the plurality of first signal interface sets through an independent internal channel, and the internal channel is arranged inside the switching module 1. The plurality of first signal channel groups, each of the plurality of first signal channel groups is used to connect each first signal interface set with the corresponding camera signal interface set of the front camera module 3; it should be noted that the first signal interface set and the camera signal interface set connected to each other through the same first signal channel group should correspond to each other, that is, each pin in the first signal interface set has a corresponding pin in the camera signal interface set, and after being connected through the first signal channel group, the corresponding pins are connected through a signal channel in the first signal channel group. For example, when the first signal interface set and the camera signal interface set both include: mipi interface, low-speed I2C interface, MCLK interface and reset interface, the first signal channel group needs to include: mipi signal channel, low-speed I2C signal channel, MCLK signal channel and reset signal channel. The second signal channel group is used to connect the processor 2 signal interface set with the second signal interface set; it should be noted that each pin in the processor 2 signal interface set has a corresponding pin in the second signal interface set, and after being connected through the second signal channel group, the corresponding pins are connected through a signal channel in the second signal channel group. For example, when the second signal interface set and the processor 2 signal interface set both include: mipi interface, low-speed I2C interface, MCLK interface and reset interface, the first signal channel group needs to include: mipi signal channel, low-speed I2C signal channel, MCLK signal channel and reset signal channel.

[0043] A signal switching channel is used to connect a first signal switching interface and a second signal switching interface, wherein the signal switching channel is used to transmit indication information from the processor 2, and the indication information is used to indicate a target signal channel group that is connected to the second signal channel group among multiple first signal channel groups; that is, the signal switching channel is used to transmit the indication information from the first signal switching interface on the processor 2 to the second signal switching interface after the processor 2 generates the indication information, so that the switching module 1 can determine the target signal channel group that is connected to the second signal channel group among multiple first signal channel groups according to the indication information, and since each first signal channel group is used to connect to the corresponding front camera module 3, after the first signal channel group corresponding to a front camera module 3 is connected to the second signal channel group, the front camera module 3 can also be connected to the processor 2, and thus the indication information can also achieve the function of determining the front camera module 3 that is connected to the processor 2 among multiple front camera modules 3. For example, when the indication information is switch_control, when the switch_control is at a high level, the first signal channel group A is connected to the second signal channel group through the switching module 1; if the switch_control is at a low level, the first signal channel group B is connected to the second signal channel group through the switching module 1. That is to say, if the switch_control is pulled high, all channels are cut to the front camera module 3a (the front camera module 3 connected to the first signal channel group A), that is, all interfaces in the signal interface set of the processor 2 are connected to the front camera module 3a and disconnected from the front camera module 3b.

[0044] Through this embodiment, the target signal channel group that is connected to the second signal channel group among multiple first signal channel groups can be determined through the indication information from the signal switching channel. Since each first signal channel group is connected to the corresponding front camera module 3, the communication connection between the processor 2 and any front camera module 3 can be achieved through a second signal channel group. In addition, since the signal lines required by the signal switching channel are far less than the signal lines of the first signal channel group, the resource requirements of the multiple front camera components for the processor 2 can be effectively reduced on the premise that each front camera module 3 can be enabled, and the number of signal lines across the rotating axis (i.e., across the first flip side and the second flip side) between the front camera component and the processor 2 can be effectively reduced, thereby effectively solving the technical problems of high resource requirements (for example, interface resources of the processor 2) and large PCB layout area of ​​the multiple front camera circuits of folding screen mobile phones in the related art.

[0045] As an optional embodiment, the first signal channel group includes: a high-speed mipi signal channel, an I2C signal channel, an MCLK signal channel and a reset signal channel.

[0046] It is easy to understand that when the first signal channel group includes a high-speed mipi signal channel, an I2C signal channel, an MCLK signal channel and a reset signal channel, the processor 2 signal interface set, the first signal interface set and the second signal interface set may include: a high-speed mipi interface, a low-speed I2C interface, an MCLK interface and a reset interface.

[0047] Optionally, when the signal interface set of processor 2 includes: mipi interface, low-speed I2C interface, MCLK interface and reset interface, the mipi interface can be separately set in processor 2, and the above-mentioned low-speed I2C interface, MCLK interface and reset interface can be integrated in the GPIOs interface.

[0048] In the first signal interface set, the high-speed mipi interface, the low-speed I2C interface, the MCLK interface and the reset interface can be integrated together to facilitate the connection between the first signal interface set and other interfaces.

[0049] In the second signal interface set, the high-speed mipi interface, the low-speed I2C interface, the MCLK interface and the reset interface may also be integrated together to facilitate the connection between the second signal interface set and other interfaces.

[0050] As an optional embodiment, a pull-down resistor is provided in the reset signal channel, which is used to lower the level of the reset signal channel when the front camera module 3 connected to the reset signal channel is not enabled, so that the front camera module 3 connected to the reset signal channel enters a reset or low power consumption state.

[0051] As an optional embodiment, the resistance of the pull-down resistor can be between 10Ω and 1000KΩ. Further, the pull-down resistor can be set in the reset signal channel, and its resistance can be selected according to actual needs, and its resistance can be between tens of ohms and hundreds of K ohms, so as to ensure that, for example, when RST1 (i.e., the reset signal channel connected to the front camera module 3a) is connected to the CPU, RST2 (i.e., the reset signal channel connected to the front camera module 3a) is not enabled, and RST2 is determined to pull down the level, so as to ensure that the front camera module 3b is in a reset or low power consumption state.

[0052] As an optional embodiment, the front camera module 3 also includes a power interface; the first front camera module 3 and the second front camera module 3 meet the preset voltage similarity requirement, wherein the first front camera module 3 and the second front camera module 3 are two different cameras among the multiple front camera modules 3, and the preset voltage similarity requirement includes: the voltage difference between the power supply voltage of the first front camera module 3 and the power supply voltage of the second front camera module 3 is within the preset voltage difference range; and / or, the power supply voltage of the first front camera module 3 is within the safety voltage range of the second front camera module 3, and the power supply voltage of the second front camera module 3 is within the safety voltage range of the first front camera module 3; it is easy to understand that after the first front camera module 3 and the second front camera module 3 meet the above-mentioned preset voltage similarity requirement, the following beneficial effects can be effectively achieved: when set to the voltage of the first front camera module 3, the second front camera module 3 will not be damaged; when the first front camera module 3 is working, the second front camera module 3 will not have a large leakage current, so it will not cause the problem of excessive power consumption.

[0053] The multi-front camera circuit also includes: a power management chip 4 and a power line group, one end of the power line group is used to connect to the power management chip 4, and the other end of the power line group is used to connect to each power interface in parallel. That is to say, one end of the power line group is connected to the power management chip 4, and the other end is divided into multiple branches at a node, each branch is connected to a corresponding power interface, and each branch is connected to the power interface one by one. Furthermore, the node is located on the second flip side, so that the number of power lines included in the power line group across the second flip side and the first flip side can be significantly reduced.

[0054] Optionally, the power management chip 4 may be a PMIC (an integrated circuit with a power management function integrated therein) or an LDO (ie, a low dropout regulator, a low voltage difference linear regulator).

[0055] Furthermore, the multi-front camera circuit also includes a power control circuit group, which is used to connect the power management chip 4 with the third signal interface on the processor 2 through a target connection method, wherein the target connection method corresponding to the power control circuit group includes at least one of the following: SPMI, I2C or GPIO.

[0056] It is easy to understand that, because a set of processor 2 signal interfaces and a set of power supplies of the processor 2 are actually used, among the multiple front camera modules 3, at most only one front camera module 3 can be in working state at any time. Figure 2 The examples shown are similar to Figure 1 For comparison, in the example shown Figure 2 and Figure 1There are two front camera modules 3 that need to be connected to the processor 2 across the shaft, such as Figure 2 As shown, the number of cross-axis signals required is 14, which is Figure 1 As shown, 25 cross-axis signals are required to connect the two front camera modules 3 to the processor 2 across the axis, which significantly reduces the number of cross-axis signal lines and the resource requirements for the processor 2.

[0057] As an optional embodiment, the power supply line group includes: an AVDD line, a DVSS line and an IOVDD line.

[0058] Among them, the AVDD line is the analog power line, the DVDD line is the digital power line, and the IOVDD line is the IOVDD digital IO power line.

[0059] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0061] In the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed to" or "mounted on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. A foldable terminal, characterized in that: include: Processor, multiple front camera modules and connecting circuits; The processor is located at the first flip side of the foldable terminal, and the processor is provided with a processor signal interface set and a first signal switching interface; The plurality of front camera modules are located on the second flip side of the foldable terminal, each of the plurality of front camera modules is provided with a camera signal interface set, wherein the first flip side and the second flip side are foldably arranged; The connecting circuit comprises: A switching module, located at the second flip side of the foldable terminal, the switching module comprising a plurality of first signal interface sets, a second signal interface set and a second signal switching interface; A plurality of first signal channel groups, each of the plurality of first signal channel groups being used to connect each first signal interface set with a camera signal interface set of a corresponding front camera module; A second signal channel group, used to connect the processor signal interface set with the second signal interface set; A signal switching channel is used to connect the first signal switching interface and the second signal switching interface, wherein the signal switching channel is used to transmit indication information from the processor, and the indication information is used to indicate a target signal channel group among the multiple first signal channel groups that is connected to the second signal channel group.

2. The foldable terminal according to claim 1, characterized in that: The first signal channel group includes: High-speed mipi signal channel, I2C signal channel, MCLK signal channel and reset signal channel.

3. The foldable terminal according to claim 2, characterized in that: A pull-down resistor is provided in the reset signal channel, which is used to lower the level of the reset signal channel when the front camera module connected to the reset signal channel is not enabled, so that the front camera module connected to the reset signal channel enters a reset or low power consumption state.

4. The foldable terminal according to claim 1, characterized in that: The front camera module also includes a power interface; the first front camera module and the second front camera module meet similar preset voltage requirements, wherein the first front camera module and the second front camera module are two different cameras among the multiple front camera modules.

5. The foldable terminal according to claim 4, characterized in that: The preset voltage similarity requirement includes: the voltage difference between the power supply voltage of the first front camera module and the power supply voltage of the second front camera module is within a preset voltage difference range; and / or, the power supply voltage of the first front camera module is within the safety voltage range of the second front camera module, and the power supply voltage of the second front camera module is within the safety voltage range of the first front camera module.

6. The foldable terminal according to claim 4, characterized in that: Also includes: Power management chip and power circuit group; One end of the power line group is used to connect to the power management chip, and the other end of the power line group is used to connect in parallel to the power interface in each of the front camera modules.

7. The foldable terminal according to claim 6, characterized in that: The power supply circuit group includes: an AVDD circuit, a DVSS circuit and an IOVDD circuit.

8. The foldable terminal according to claim 6, characterized in that: The power management chip is connected to the third signal interface on the processor via a target connection mode, wherein the target connection mode includes at least one of the following: SPMI, I2C or GPIO.

9. The foldable terminal according to claim 1, characterized in that: The multiple front camera modules at least include: a front camera module located on the main screen side and a front camera module located on the sub-screen side.

10. The foldable terminal according to claim 3, characterized in that: The resistance of the pull-down resistor is between 10Ω and 1000KΩ.

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