CN106155615A - screen folding apparatus, control method and control device - Google Patents

Abstract

The invention provides a screen folding device, a control method and a control device. According to the present invention, wherein, the control method uses the master device to acquire the unfolded or folded state of the slave device, and the master device controls the master device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device. Controlling with the display mode of the slave device solves the problem of limited screen size of the terminal and single display control mode, increases the size of the screen of the terminal, and improves the flexibility of the screen display of the terminal.

Description

Screen folding device, control method and control device

technical field

The present invention relates to the communication field, in particular to a screen folding device, a control method and a control device.

Background technique

At present, there is a great demand for screen size in certain situations. For example, a larger screen is required for watching movies, but a large screen is not needed for answering calls, and it is very inconvenient to carry a large screen. If there is a device screen that can be folded when not in use, it will be very convenient to carry. When folded, the small-sized screen meets daily needs; when unfolded, the large-sized screen can meet the needs of large-screen devices.

When using a mobile device, only the content of the current application window can be displayed on the screen, which cannot meet the demand for simultaneous preview and display of two or more windows. For example, if you want to watch a movie and chat again, you can only switch between two applications frequently, which is very troublesome.

In related technologies, some screens are flexible and foldable, which is not suitable for all screens; the working mode of the flexible screen can be switched to MP3, MP4, tablet computer or mobile phone mode according to the folding state of the screen. It cannot be switched by the user at will, and the mode is relatively fixed and rigid.

Aiming at the problem in the related art that the screen size of the terminal is limited and the display control mode is single, no effective solution has been proposed yet.

Contents of the invention

The present invention provides a screen folding device, a control method and a control device to at least solve the problems of limited screen size of a terminal and a single display control mode.

According to an aspect of the present invention, a screen folding device is provided, including: a master device, at least two slave devices;

The main device includes a first screen module and a first screen expansion interface module;

Each of the slave devices includes a second screen module and a second screen expansion interface;

The first screen module is foldably connected to the second screen module through the first screen expansion interface module and the second screen expansion interface module, and the second screen modules can be connected through the second screen expansion interface Fold links.

Further, the first screen extension interface module and the second screen extension interface module are used to carry out between the first screen module and the second screen module and between multiple second screen modules. information transmission and/or power supply.

Further, the master device includes a processor module,

The processor module obtains the expanded or folded states of the master device and the slave device through the first screen expansion interface module, or receives setting instructions of the master device and the slave device;

The display modes of the first screen module and the second screen module are controlled according to the unfolded or folded state and the setting instruction.

Further, the master device module includes: a first power supply module, configured to supply power to the master device and the slave device.

Further, the slave device includes a second power supply module, configured to supply power to the slave device; or, configured to supply power to the master device.

Further, it also includes,

Some or all of the first screen module and the second screen module include: a touch unit.

According to another aspect of the present invention, a method for controlling a screen folding device is also provided. The screen folding device includes: a master device and at least two slave devices; the master device is foldably connected to the slave device;

The master device obtains the unfolded or folded state of the slave device;

The master device controls the display modes of the master device and the slave device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device.

Further, the master device controlling the display modes of the master device and the slave device according to the unfolded or folded state, or receiving setting instructions from the master device and the slave device includes,

When detecting that one of the slave devices is in an expanded state, setting the current display mode to a dual-screen display mode or a single-screen display mode;

When it is detected that two of the slave devices are in the unfolded state, it is set to a three-screen display mode, a dual-screen display mode or a single-screen display mode;

When it is detected that all the slave devices in the slave devices are in the expanded state, it is set to a four-screen display mode, a three-screen display mode, a double-screen display mode or a single-screen display mode.

Further, the master device controlling the display modes of the master device and the slave device according to the unfolded or folded state, or receiving setting instructions from the master device and the slave device includes:

Receive touch operation signals on the master device and the slave device, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode, three-screen display mode, dual-screen display mode, One-screen display mode, single-screen display mode.

Further, the four-screen display mode, the three-screen display mode or the dual-screen display mode display different display contents on the multi-screen interface corresponding to the current display mode.

According to one aspect of the present invention, a control device for a screen folding device is provided. The screen folding device includes: a master device and at least two slave devices; the master device is foldably connected to the slave device, and the device includes:

An acquisition module, configured for the master device to acquire the unfolded or folded state of the slave device;

A control module, configured for the master device to control the display modes of the master device and the slave device according to the unfolded or folded state, or receive setting instructions from the master device and the slave device.

Further, the control module includes:

The first switching unit is configured to set the current display mode as a dual-screen display mode or a single-screen display mode when it is detected that one of the slave devices is in an unfolded state;

The second switching unit is configured to set to a three-screen display mode, a dual-screen display mode or a single-screen display mode when it is detected that two of the slave devices are in an unfolded state;

The third switching unit is configured to set a four-screen display mode, a three-screen display mode, a double-screen display mode or a single-screen display mode when it is detected that all the slave devices in the slave devices are in the unfolded state.

Further, the control module includes:

The fourth switching unit is configured to receive a touch operation signal on the master device and the slave device, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode , Three-screen display mode, dual-screen display mode, and single-screen display mode.

Further, include:

The display module is used to display different display contents on the multi-screen interface corresponding to the current display mode in the four-screen display mode, the three-screen display mode or the dual-screen display mode.

According to the present invention, the master device is used to acquire the unfolded or folded state of the slave device, and the master device, according to the unfolded or folded state, or receives the setting instructions of the master device and the slave device, controls the master device and the slave device. The display mode is controlled, which solves the problem of limited screen size of the terminal and single display control mode, increases the size of the screen of the terminal, and improves the flexibility of the screen display of the terminal.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a flow chart of a method for controlling a screen folding device according to an embodiment of the present invention;

Fig. 2 is a structural block diagram of a control device of a screen folding device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of main modules and interfaces of the master device according to a preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of the main modules and interfaces of the slave device 1 and the slave device 3 according to a preferred embodiment of the present invention;

Fig. 5 is a schematic diagram of the main modules and interfaces of the slave device 2 according to a preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of a slave device working mode according to a preferred embodiment of the present invention;

Fig. 7 is a schematic diagram of two slave device working modes according to a preferred embodiment of the present invention;

Fig. 8 is a schematic diagram of three slave device working modes according to a preferred embodiment of the present invention;

Fig. 9 is a schematic diagram of defining side numbers of the master device and the slave device according to a preferred embodiment of the present invention;

Fig. 10 is a schematic diagram of unfolding and folding of the screen of a mobile communication device according to a preferred embodiment of the present invention;

Fig. 11 is a flowchart of device control management according to a preferred embodiment of the present invention.

detailed description

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence.

In this embodiment, a screen folding device is provided, including: a master device and at least two slave devices;

The main device includes a first screen module and a first screen expansion interface module;

Each of the slave devices includes a second screen module and a second screen expansion interface;

The first screen module is foldably connected to the second screen module through the first screen expansion interface module and the second screen expansion interface module, and the second screen modules are foldably connected through the second screen expansion interface.

In the device, the first screen extension interface module and the second screen extension interface module are used for information transmission and communication between the first screen module and the second screen module and between multiple second screen modules. / or supply power.

In this embodiment, the master device includes a processor module,

The processor module acquires the expanded or folded states of the master device and the slave device through the first screen expansion interface module, or receives setting instructions of the master device and the slave device;

The display modes of the first screen module and the second screen module are controlled according to the unfolded or folded state and the setting instruction.

In this embodiment, the master device module includes: a first power supply module, configured to supply power to the master device and the slave device. The slave device includes a second power supply module, used to supply power to the slave device; or, used to supply power to the master device.

In this embodiment, part or all of the first screen module and the second screen module include: a touch unit.

In this embodiment, a method for controlling a screen folding device is provided, wherein the screen folding device includes: a master device and at least three slave devices; the master device is foldably connected to the slave devices, and FIG. A flow chart of a method for controlling a screen folding device according to an embodiment of the invention, as shown in FIG. 1 , the process includes the following steps:

Step S102, the master device obtains the unfolded or folded state of the slave device;

Step S104, the master device controls the display modes of the master device and the slave device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device.

Through the above steps, the master device controls the display modes of the master device and the slave device according to the unfolded or folded state of the slave device, or receives the setting instructions of the master device and the slave device, which solves the problem that the size of the terminal screen is limited , the problem of a single display control mode increases the size of the screen of the terminal and improves the flexibility of the screen display of the terminal.

In this embodiment, when it is detected that one of the slave devices is in the expanded state, the current display mode is set to a dual-screen display mode or a single-screen display mode;

When it is detected that two of the slave devices are in the unfolded state, it is set to a three-screen display mode, a dual-screen display mode or a single-screen display mode;

When it is detected that all the slave devices in the slave device are in the unfolded state, it is set to a four-screen display mode, a three-screen display mode, a dual-screen display mode or a single-screen display mode.

In this embodiment, a touch operation signal on the master device and the slave device is received, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode, three-screen display mode, Dual-screen display mode, single-screen display mode.

In the above implementation, the four-screen display mode, three-screen display mode or dual-screen display mode displays different display contents on the multi-screen interface corresponding to the current display mode.

In this embodiment, a control device for a screen folding device is also provided, and the device is used to implement the above embodiments and preferred implementation modes, and what has been explained will not be repeated here. As used below, the term "module" may be a combination of software and/or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 2 is a structural block diagram of a control device for a screen folding device according to an embodiment of the present invention. As shown in Fig. 2 , the device includes

Obtaining module 22, used for the master device to obtain the unfolded or folded state of the slave device;

The control module 24 is used for the master device to control the display modes of the master device and the slave device according to the unfolded or folded state, or receive setting instructions from the master device and the slave device.

Through the above device, the master device controls the display mode of the master device and the slave device according to the unfolded or folded state of the slave device, or receives the setting instructions of the master device and the slave device, which solves the problem that the size of the terminal screen is limited , the problem of a single display control mode increases the size of the screen of the terminal and improves the flexibility of the screen display of the terminal.

In this embodiment, the control module 24 includes:

The first switching unit is configured to set the current display mode as a dual-screen display mode or a single-screen display mode when it is detected that one of the slave devices is in an unfolded state;

The second switching unit is configured to set to a three-screen display mode, a dual-screen display mode or a single-screen display mode when it is detected that two of the slave devices are in an unfolded state;

The third switching unit is configured to set to a four-screen display mode, a three-screen display mode, a dual-screen display mode or a single-screen display mode when it is detected that all the slave devices in the slave devices are in the unfolded state.

In this embodiment, the control module 24 includes:

The fourth switching unit is used to receive the touch operation signal on the master device and the slave device, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode, three-screen display mode , Dual-screen display mode, single-screen display mode.

In this embodiment, the device further includes: a display module, configured to display different display contents on the multi-screen interface corresponding to the current display mode in the four-screen display mode, the three-screen display mode or the dual-screen display mode.

The present invention will be described in detail below in combination with preferred embodiments and examples.

This preferred embodiment designs a method for folding and expanding the screen of a mobile communication device, and a scheme for controlling each screen of the mobile device to work independently or cooperatively according to the unfolded state of the screen.

In this preferred embodiment, the foldable device of the screen is composed of a master device and three slave devices (slave device 1, slave device 2, and slave device 3). Fig. 3 is a schematic diagram of main modules and interfaces of the main device according to a preferred embodiment of the present invention. The main device includes: a CPU processor module, a power supply module, a screen, a screen expansion port 1 and a screen expansion port 2.

Fig. 4 is a schematic diagram of the main modules and interfaces of the slave device 1 and the slave device 3 according to a preferred embodiment of the present invention. The slave device includes: a screen expansion port 3, a power supply module, and a screen.

Fig. 5 is a schematic diagram of the main modules and interfaces of the slave device 2 according to a preferred embodiment of the present invention. As shown in Fig. 5, the slave device is composed of a screen expansion port 4, a screen expansion port 5, a power supply module, and a screen. The above-mentioned screen expansion ports of the master device and the slave device can realize the connection between the slave device and the master device, the connection between the slave device and the slave device, the communication between the slave device and the master device, and the communication between the slave device and the slave device.

The screen control scheme is to control the screen to display different content or display the same content as a whole according to the screen expansion state. According to user needs, you can choose to fold all three slave devices; expand one slave device; expand two slave devices; unfold all three slave devices in four modes.

The connections and functions of each part of the foldable device with the screen are:

The master device is responsible for the management and control of the entire communication device, and controls and coordinates the display content of the master device and each slave device according to user needs and operations. The slave device is only responsible for display and communication functions. The slave device 1 and the slave device 2 communicate and connect directly with the master device, and the slave device 3 indirectly communicates and connects with the master device through the slave device 2 . The master device can detect and control the deployment status of the three slave devices through the communication interface.

The screen display control scheme and implementation process are as follows:

Fig. 6 is a schematic diagram of a working mode of a slave device according to a preferred embodiment of the present invention. As shown in Fig. 6, when the device starts to work, it first detects whether slave devices 1, 2, and 3 are unfolded sequentially, and when the expanded three slave devices are all folded At this time, only one screen of the main device works, and it is used as a single-screen communication device.

When only unfolding from device 1, you can choose a dual-screen mode in which the two screens work independently or a single-screen mode in which the two screens work together. When the dual-screen mode is selected, the two screens can display different content respectively, realizing the dual-screen dual-screen mode of the mobile device. Independently display the window function, and the two screens can realize separate touch operation; in the case of single-screen mode, the two screens can be used as a larger screen to display the content that the mobile device currently needs to display, and operate as a whole screen , expanding the screen size.

Figure 7 is a schematic diagram of the working modes of two slave devices according to a preferred embodiment of the present invention. As shown in Figure 7, when only slave device 1 and slave device 2 are deployed, three screens with three screens working independently can be selected to display three screens respectively. You can also choose dual-screen mode, at this time, the master device and slave device 1 work together to display the same content as a larger screen display, and slave device 3 displays different content from slave devices 1 and 2;

Fig. 8 is a schematic diagram of the working modes of three slave devices according to a preferred embodiment of the present invention. As shown in Fig. 8, when the three slave devices are all unfolded, the four-screen mode can be selected so that the four devices display different content respectively; One-screen mode, so that slave device 1 and master device can display the same content in cooperation, and slave device 2 and slave device 3 can display the same content in cooperation; or the single-screen mode in which the master device and three slave devices work together can display the same content as a whole, expanding Screen. And each mode can be switched freely by the user.

Fig. 9 is a schematic diagram of defining side numbers of the master device and the slave device according to a preferred embodiment of the present invention;

Fig. 10 is a schematic diagram of unfolding and folding the screen of a mobile communication device according to a preferred embodiment of the present invention. As shown in Fig. 9 and Fig. 10, the unfolding and folding process is as follows:

S1.1 Slave device 1 expands to the right along the No. 2 side of the master device, and the screen expansion interface 1 of slave device 1 is connected to the screen expansion interface 2 of the master device. After unfolding, slave device 1 sends a device expansion to the master device through the screen expansion interface interrupt signal.

S1.2 Slave device 2 is deployed downward along side No. 1 of the master device, and the screen expansion interface 1 of slave device 2 is connected to the screen expansion interface 2 of the master device. interrupt signal;

S1.3 Slave device 3 expands to the right along side No. 2 of slave device 2, and the screen expansion interface 1 of slave device 3 is connected to the screen expansion interface 2 of slave device 2. Signals an interrupt for device unwrapping.

S1.4 Slave device 3 folds along the direction of edge 2 of slave device 2, and at the same time sends an interrupt signal to the master device to notify the master device of its folding information;

S1.5 Slave device 2 folds along the direction of side 1 of the master device and simultaneously sends an interrupt signal to the master device to notify the master device of its folding information;

S1.6 Slave device 1 folds along the direction of side 2 of the master device and at the same time sends an interrupt signal to the master device to notify the master device of its folding information;

Fig. 11 is a flow chart of equipment control management according to a preferred embodiment of the present invention. As shown in Fig. 11, the working process is:

S2.1 The system is powered on and initialized to control the main device screen to light up and display the content of the main interface of the transfer device; jump to S2.2.

S2.2 detects whether the slave device 1 is deployed, and jumps to S2.3 if the slave device 1 is deployed, otherwise jumps to S2.8.

S2.3 Control slave device 1 to display the default slave device desktop, make the master device and slave device work as independent devices, each display different content, and provide a virtual button to switch to the master device and slave device to work together on the interface; jump to S2.4.

S2.4 detects whether the slave device 2 is deployed. If deployed from device 2, skip to S2.5, otherwise skip to S2.8.

S2.5 controls slave device 2 to display the default slave device desktop, making slave device 2 work as an independent device, and jumps to S2.6.

S2.6 detects whether the slave device 3 is deployed. If deployed from device 3, skip to S2.7, otherwise skip to S2.8.

S2.7 Control slave device 3 to display the default slave device desktop, make slave device 3 work as an independent device, and provide virtual buttons for independent and cooperative work of each slave device on the display screen of the master device. Skip to S2.8.

S2.8 waits for a user command or a signal from the device to fold or unfold. If there is a signal, jump to S2.9, if there is no signal, wait in S2.8.

S2.9 judges whether the interruption is caused by screen expansion or folding. If yes, skip to S2.10, otherwise, skip to S2.11.

When the S2.10 screen is unfolded, the corresponding default desktop is displayed, and corresponding virtual buttons for screen control are added to the main interface. When the screen is folded, the display content of the corresponding screen is turned off, and at the same time, the control virtual buttons of the corresponding screen of the main interface are turned off. Skip to S2.8.

S2.11 Complete corresponding control actions according to user instructions or other mobile communication device functions. Jump to S2.8 after completion.

Through this preferred embodiment, the foldability of the screen is realized. When the user needs a large screen, all slave devices can be expanded to increase the screen size. When the user only makes calls or carries it, the slave device can be folded to reduce the screen size. Greatly increased the flexibility of device screen size adjustment. It meets the requirements of the same user for large and small screen sizes in different states.

The multi-screen and multi-window display of mobile devices is realized. Users can choose single-screen display, dual-screen display, triple-screen display or quad-screen display. It greatly improves the flexibility of users for multi-window requirements of mobile devices. It satisfies the needs of users for displaying different windows in different situations.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to enable a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the above-mentioned storage medium may be configured to store program codes for executing the method in the above-mentioned embodiment:

Optionally, in this embodiment, the above-mentioned storage medium may include but not limited to: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk Various media that can store program codes such as discs or optical discs.

Optionally, in this embodiment, the processor executes the methods in the foregoing embodiments according to the program code stored in the storage medium.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (14)

1. A screen folding device, characterized in that it comprises: a master device and at least two slave devices; The main device includes a first screen module and a first screen expansion interface module; Each of the slave devices includes a second screen module and a second screen expansion interface; The first screen module is foldably connected to the second screen module through the first screen expansion interface module and the second screen expansion interface module, and the second screen modules can be connected through the second screen expansion interface Fold links. 2. The device according to claim 1, characterized in that it comprises: the first screen extension interface module and the second screen extension interface module are used to connect the first screen module and the second screen module Information transmission and/or power supply are performed among multiple second screen modules. 3. The device according to claim 1, wherein the main device comprises a processor module, The processor module obtains the expanded or folded states of the master device and the slave device through the first screen expansion interface module, or receives setting instructions of the master device and the slave device; The display modes of the first screen module and the second screen module are controlled according to the unfolded or folded state and the setting instruction. 4. The device according to claim 1, wherein the master device module comprises: a first power supply module, configured to supply power to the master device and the slave device. 5. The device according to claim 1, wherein the slave device comprises a second power supply module, configured to supply power to the slave device; or, configured to supply power to the master device. 6. The device according to any one of claims 1 to 4, further comprising, Some or all of the first screen module and the second screen module include: a touch unit. 7. A control method for a screen folding device, characterized in that the screen folding device includes: a master device and at least two slave devices; the master device is foldably connected to the slave device; The master device obtains the unfolded or folded state of the slave device; The master device controls the display modes of the master device and the slave device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device. 8. The method according to claim 7, characterized in that, the master device controls the master device and the slave device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device Control from the display mode of the device includes, When detecting that one of the slave devices is in an expanded state, setting the current display mode to a dual-screen display mode or a single-screen display mode; When it is detected that two of the slave devices are in the unfolded state, it is set to a three-screen display mode, a dual-screen display mode or a single-screen display mode; When it is detected that all the slave devices in the slave devices are in the expanded state, it is set to a four-screen display mode, a three-screen display mode, a double-screen display mode or a single-screen display mode. 9. The method according to claim 7, characterized in that, the master device controls the master device and the slave device according to the unfolded or folded state, or receives setting instructions from the master device and the slave device Control from the display mode of the device includes: Receive touch operation signals on the master device and the slave device, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode, three-screen display mode, dual-screen display mode, One-screen display mode, single-screen display mode. 10. The method according to claim 8 or claim 9, comprising: The four-screen display mode, the three-screen display mode or the dual-screen display mode display different display contents on the multi-screen interface corresponding to the current display mode. 11. A control device for a screen folding device, characterized in that the screen folding device includes: a master device and at least two slave devices; the master device is foldably connected to the slave device, and the device includes: An acquisition module, configured for the master device to acquire the unfolded or folded state of the slave device; A control module, configured for the master device to control the display modes of the master device and the slave device according to the unfolded or folded state, or receive setting instructions from the master device and the slave device. 12. The device according to claim 11, wherein the control module comprises: The first switching unit is configured to set the current display mode as a dual-screen display mode or a single-screen display mode when it is detected that one of the slave devices is in an unfolded state; The second switching unit is configured to set to a three-screen display mode, a dual-screen display mode or a single-screen display mode when it is detected that two of the slave devices are in an unfolded state; The third switching unit is configured to set a four-screen display mode, a three-screen display mode, a double-screen display mode or a single-screen display mode when it is detected that all the slave devices in the slave devices are in the unfolded state. 13. The device according to claim 11, wherein the control module comprises: The fourth switching unit is configured to receive a touch operation signal on the master device and the slave device, the touch operation signal is an instruction to switch the display mode, and the display mode includes one of the following: four-screen display mode , Three-screen display mode, dual-screen display mode, and single-screen display mode. 14. The device according to claim 12 or claim 13, comprising The display module is used to display different display contents on the multi-screen interface corresponding to the current display mode in the four-screen display mode, the three-screen display mode or the dual-screen display mode.