WO2016173158A1

WO2016173158A1 - Screen folding device, control method and control device

Info

Publication number: WO2016173158A1
Application number: PCT/CN2015/088166
Authority: WO
Inventors: 孙少杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-04-27
Filing date: 2015-08-26
Publication date: 2016-11-03
Also published as: CN106155615A

Abstract

A screen folding device, control method and control device. The control method comprises: obtaining, by a master device, expanded/folded states of slave devices (1, 2, 3) (S102); and controlling, by the master device, the display mode of the master device and the slave devices (1, 2, 3) either according to the expanded/folded states or by receiving a configuration instruction from the master device and the slave devices (1, 2, 3) (S104). The present invention addresses the problems caused by the limited size of terminal screens and single display control modes, thus increasing display size for terminals, and improving display flexibility for terminal screens.

Description

Screen folding device, control method and control device

Technical field

The present invention relates to the field of communications, and 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 a certain state. For example, when watching a movie, a large screen is required, and when a call is received, a large screen is not required, and the screen is large and inconvenient to carry. If you can have a device screen that can be folded when not in use, it will be convenient to carry. When folding, the small-sized screen meets the daily needs; after the expansion, the large-size screen can meet the demand for large-screen devices.

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

In the related art, some screens are flexible in themselves, the screen itself is foldable, and is not suitable for all screens; the flexible screen works in a manner that can be switched to MP3, MP4, tablet or mobile phone mode according to the folding state of the screen. It can't be switched by the user at will, and the mode is fixed and rigid.

In view of the related art, the size of the screen of the terminal is limited, and the display control mode is single, and an effective solution has not been proposed yet.

Summary of the invention

The invention provides a screen folding device, a control method and a control device, so as to solve at least the problem that the screen size of the terminal is limited and the display control mode is single.

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

The master 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 by using the first screen expansion interface module and the second screen expansion interface module, and the second screen module is extended by the second screen interface. Fold the connection.

In the embodiment of the present invention, the first screen expansion interface module and the second screen expansion interface module are used between the first screen module and the second screen module and a plurality of the second screens Information transfer and/or power supply between modules.

In the embodiment of the present invention, the master device includes a processor module,

The processor module acquires an expanded or collapsed state of the master device and the slave device by using the first screen expansion interface module, or receives a setting instruction of the master device and the slave device;

And controlling a display mode of the first screen module and the second screen module according to the unfolding or folding state and the setting instruction.

In the embodiment of the present invention, the main device module includes: a first power supply module, configured to supply power to the main device and the slave device.

In the embodiment of the present invention, the slave device includes a second power supply module configured to supply power to the slave device, or is configured to supply power to the master device.

In the embodiment of the present invention, the method further includes

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

According to another embodiment of the present invention, there is also provided a method for controlling a screen folding device, the screen folding device comprising: a master device and at least two slave devices; the master device being foldably connected to the slave device;

The master device acquires an expanded or collapsed state of the slave device;

The master device controls display modes of the master device and the slave device according to the expanded or collapsed state or receiving a setting instruction of the master device and the slave device.

In the embodiment of the present invention, the master device controls the display mode of the master device and the slave device according to the expanded or collapsed state, or receives a setting instruction of the master device and the slave device, including ,

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

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

When it is detected that all of the slave devices in the slave device are in an 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 the embodiment of the present invention, the master device controls the display mode of the master device and the slave device according to the expanded or collapsed state, or receives a setting instruction of the master device and the slave device, including :

Receiving a touch operation signal on the master device and the slave device, the touch operation signal is a switching indication of the display mode, and the display mode includes one of the following: a four-screen display mode, a three-screen display mode, and a double Screen display mode, single screen display mode.

In the embodiment of the present invention, the four-screen display mode, the three-screen display mode, or the dual-screen display mode displays different display contents on the multi-screen interface corresponding to the current display mode.

According to an embodiment of the present invention, there is provided a control device for a screen folding device, the screen folding device comprising: a master device and at least two slave devices; the master device being foldably connected to the slave device, the device comprising:

Obtaining a module, configured to acquire, by the master device, an expanded or collapsed state of the slave device;

And a control module configured to control, by the master device, the display mode of the master device and the slave device according to the expanded or collapsed state, or receiving a setting instruction of the master device and the slave device.

In the embodiment of the present invention, the control module includes:

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

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

The third switching unit is configured to be set to a four-screen display mode, a three-screen display mode, a dual-screen display mode, or a single-screen display mode when detecting that all of the slave devices in the slave device are in an expanded state.

In the embodiment of the present invention, the control module includes:

a fourth switching unit, configured to receive a touch operation signal on the master device and the slave device, where the touch operation signal is a switching indication of the display mode, and the display mode includes one of the following: a four-screen display mode , three-screen display mode, dual-screen display mode, single-screen display mode.

In the embodiment of the present invention, the method includes:

And displaying, by the display module, the four-screen display mode, the three-screen display mode, or the dual-screen display mode, displaying different display content on the multi-screen interface corresponding to the current display mode.

According to the present invention, the unfolded or folded state of the slave device is acquired by the master device, and the master device receives the setting instructions of the master device and the slave device according to the expanded or folded state, and the master device and the slave device The display mode is controlled to solve the problem that the screen size of the terminal is limited, the display control mode is single, the size of the screen of the terminal is increased, and the screen display flexibility of the terminal is improved.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method of controlling a screen folding apparatus according to an embodiment of the present invention;

2 is a block diagram showing the structure of a control device for a screen folding device according to an embodiment of the present invention;

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

4 is a schematic diagram of main modules and interfaces of slave device 1 and slave device 3 in accordance with a preferred embodiment of the present invention;

5 is a schematic diagram of main modules and interfaces of a slave device 2 in accordance with a preferred embodiment of the present invention;

6 is a schematic diagram of a slave device operating mode in accordance with a preferred embodiment of the present invention;

Figure 7 is a schematic diagram showing the operation modes of two slave devices in accordance with a preferred embodiment of the present invention;

Figure 8 is a schematic diagram of the operation mode of three slave devices in accordance with a preferred embodiment of the present invention;

Figure 9 is a schematic diagram showing the definition of a parent device and a slave device in accordance with a preferred embodiment of the present invention;

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

11 is a flow chart of device control management in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

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

The first screen module is foldably connected to the second screen module by the first screen expansion interface module and the second screen expansion interface module, and the second screen module is foldably connected by the second screen expansion interface.

In the device, the first screen expansion interface module and the second screen expansion interface module are configured to perform information transmission between the first screen module and the second screen module and between the plurality of second screen modules. / or power supply.

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

The processor module acquires an expanded or collapsed state of the master device and the slave device through the first screen expansion interface module, or receives a setting instruction of the master device and the slave device;

The display mode of the first screen module and the second screen module is controlled according to the expanded or collapsed state and the setting instruction.

In this embodiment, the main 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 configured to power the slave device; or, configured to provide 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 main device And at least three slave devices; the master device is foldably connected to the slave device. FIG. 1 is a flowchart of a method for controlling a screen folding device according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps. step:

Step S102, the master device acquires an expanded or collapsed state of the slave device.

Step S104: The master device controls the display mode of the master device and the slave device according to the expanded or collapsed state or the setting instruction of the master device and the slave device.

Through the above steps, the master device controls the display mode of the master device and the slave device according to the expanded or collapsed state of the slave device or receives the setting instruction of the master device and the slave device, thereby solving the limited size of the screen of the terminal. The display control mode has a single problem, which increases the size of the screen of the terminal and improves the screen display flexibility of the terminal.

In this embodiment, when it is detected that one of the slave devices is in an unfolded state, the current display mode is set to 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 an unfolded state, the setting is a four-screen display mode, a three-screen display mode, a dual-screen display mode, or a single-screen display mode.

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

The four-screen display mode, the three-screen display mode, or the dual-screen display mode in the above implementation 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, which is used to implement the above-mentioned embodiments and preferred embodiments, and the description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

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

The obtaining module 22 is configured to acquire, by the master device, an expanded or collapsed state of the slave device;

The control module 24 is configured to control the display mode of the master device and the slave device according to the expanded or collapsed state or the setting instruction of 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 expanded or folded state of the slave device or receives the setting instruction of the master device and the slave device, thereby solving the limited size of the screen of the terminal. The display control mode has a single problem, which increases the size of the screen of the terminal and improves the screen display flexibility of the terminal.

In this embodiment, the control module 24 includes:

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

In this embodiment, the control module 24 includes:

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

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

The invention will now be described in detail in conjunction with the preferred embodiments and examples.

The preferred embodiment designs a method for folding and expanding a 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 state of its screen expansion.

In the preferred embodiment, the foldable device of the screen consists of one master device and three slave devices (slave device 1, slave device 2, slave device 3). 3 is a schematic diagram of main modules and interfaces of a 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.

4 is a schematic diagram of 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 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 master device and the slave device's screen expansion port can realize the connection between the slave device and the master device, the connection between the slave device and the slave device, and 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 display different content according to the screen expansion state control screen or display the same content as a whole. According to user requirements, three slave devices can be selected to be fully folded; one slave device is expanded; two slave devices are expanded; and three slave devices are all deployed in four modes.

The parts of the foldable device of the screen are connected and functioned as:

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 requirements and operations. The slave device is only responsible for display and communication functions. The slave device 1 and the slave device 2 directly communicate and connect with the master device, and the slave device 3 communicates and connects with the master device indirectly through the slave device 2. The master device can detect and control the unfolded state of the three slave devices through the communication interface.

The screen display control scheme and implementation process are:

6 is a schematic diagram of a slave device operating mode according to a preferred embodiment of the present invention. As shown in FIG. 6, when the device starts to work, it firstly detects whether the

slave devices

1, 2, and 3 are deployed, and when the extended three slave devices are all folded. When only the main device works on one screen, it is used as a single-screen communication device.

When only the device 1 is deployed, two screen modes of two screens working independently or a single screen mode working together can be selected. When the dual screen mode is selected, the two screens can respectively display different contents, thereby realizing the dual screen double of the mobile device. Independent display window function, and two screens can achieve separate touch operation; when single screen mode is selected, two screens can be displayed as a larger screen to display the current content of the mobile device as a whole screen operation. , expanded the screen size.

FIG. 7 is a schematic diagram showing the operation modes of two slave devices according to a preferred embodiment of the present invention. As shown in FIG. 7, when only the slave device 1 and the slave device 2 are deployed, three screens in which three screens work independently can be selected, and three screens are respectively displayed. a different window; the dual screen mode can also be selected, in which case the master device and the slave device 1 work together to display the same content in cooperation as a larger screen display, and the slave device 3 displays content different from the

slave devices

1 and 2;

8 is a schematic diagram of three slave devices operating modes according to a preferred embodiment of the present invention. As shown in FIG. 8, when all three slave devices are fully deployed, four screen modes may be selected to enable four devices to display different contents respectively; The screen mode enables the slave device 1 and the master device to display the same content in cooperation, and the slave device 2 and the slave device 3 cooperate to display the same content; or the single device mode in which the master device and the three slave devices cooperate to display the same content as a whole, and expands screen. And the user can freely choose to switch between modes.

FIG. 10 is a schematic diagram of the screen unfolding and folding of the 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:

S1.1 is extended from the device 1 to the right along the 2nd side of the main device, and the screen expansion interface 1 of the device 1 is connected to the screen expansion interface 2 of the main device. After the expansion, the device 1 is deployed to the main device through the screen expansion interface. Interrupt signal.

S1.2 is extended from the device 2 along the 1st side of the main device, and the screen expansion interface 1 of the device 2 is connected to the main device screen expansion interface 2, and after expansion, the device 2 is deployed to the main device through the screen expansion interface. Interrupt signal

S1.3 is extended from the device 3 to the right along the side 2 of the slave device 2. The screen expansion interface 1 of the slave device 3 is connected to the screen expansion interface 2 of the slave device 2, and the slave device 3 is extended to the master device through the screen expansion interface. Issue an interrupt signal for device expansion.

S1.4 is folded from the device 3 along the direction of the second side of the slave device 2, and an interrupt signal is sent to the master device to notify the master device of the folding information;

S1.5 is folded from the device 2 along the side of the main device 1 and sends an interrupt signal to the main device to notify the main device of the folding information;

S1.6 is folded from the device 1 along the direction of the 2nd side of the main device and sends an interrupt signal to the main device to notify the main device of the folding information;

11 is a flowchart of device control management according to a preferred embodiment of the present invention. As shown in FIG. 11, the working process is:

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

S2.2 detects whether the slave device 1 is deployed, and expands from the device 1 to jump S2.3, otherwise it jumps to S2.8.

S2.3 controls the slave device 1 to display the default slave device desktop, so that the master device and the slave device work as independent devices, each displaying different content, and providing a virtual button for switching to the master device and the slave device to work together on the outgoing interface; S2.4.

S2.4 detects whether the slave device 2 is deployed. If it is expanded from device 2, it will jump to S2.5, otherwise it will jump to S2.8.

S2.5 controls slave device 2 to display the default slave device desktop, and slave device 2 works as a standalone device, jumping to S2.6.

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

S2.7 controls the slave device 3 to display the default slave device desktop, so that the slave device 3 operates as a stand-alone device, and at the same time provides a virtual button for each slave device to work independently and cooperate with each other on the master device display screen. Jump to S2.8.

S2.8 waits for a user command or folds or unwinds the signal from the device. There is a signal, jump S2.9, no signal is waiting at S2.8.

S2.9 determines whether the screen is unfolded or collapsed. Yes, jump to S2.10, otherwise jump to S2.11.

The S2.10 screen expands to display the corresponding default desktop, and the corresponding screen control virtual button is added to the main interface. When the screen is folded, the display content of the corresponding screen is closed, and the control virtual button of the corresponding screen of the main interface is closed. Jump to S2.8.

S2.11 performs its corresponding control actions according to user commands or other mobile communication device functions. Go to S2.8 after completion.

With the preferred embodiment, the folding of the screen is achieved. When the user needs a large screen, all the slave devices can be expanded to increase the screen size. When the user only calls or carries, the device can be folded to reduce the screen size. It greatly increases the flexibility of device screen size adjustment. It satisfies the requirements of the same user for large and small screen sizes in different states.

A multi-screen multi-window display of the mobile device is realized. The user can select single screen display, dual screen display, three screen display or four screen display. The flexibility of the user's multi-window requirements for mobile devices has been greatly improved. It satisfies the user's need for different window display 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 embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for executing the method of the above embodiment:

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in the embodiment, the processor executes the method of the above embodiment according to the stored program code in the storage medium.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the foregoing technical solution provided by the embodiment of the present invention, the master device acquires an expanded or collapsed state of the slave device, and the master device receives the setting instruction of the master device and the slave device according to the expanded or folded state, The main device and the display mode of the slave device are controlled, which solves the problem that the screen size of the terminal is limited, the display control mode is single, the size of the screen of the terminal is increased, and the screen display flexibility of the terminal is improved.

Claims

A screen folding device includes: a master device, at least two slave devices;

The master 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 by using the first screen expansion interface module and the second screen expansion interface module, and the second screen module is extended by the second screen interface. Fold the connection.
The device according to claim 1, comprising: said first screen expansion interface module, said second screen expansion interface module for between said first screen module and said second screen module Information transmission and/or power supply is performed between the second screen modules.
The device of claim 1 wherein said master device comprises a processor module,

The processor module acquires an expanded or collapsed state of the master device and the slave device by using the first screen expansion interface module, or receives a setting instruction of the master device and the slave device;

And controlling a display mode of the first screen module and the second screen module according to the unfolding or folding state and the setting instruction.
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.
The device of claim 1, wherein the slave device comprises a second power supply module configured to power the slave device; or, configured to power the master device.
The apparatus 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.
A method for controlling a screen folding device, the screen folding device comprising: a master device and at least two slave devices; the master device being foldably connected to the slave device;

The master device acquires an expanded or collapsed state of the slave device;

The master device controls display modes of the master device and the slave device according to the expanded or collapsed state or receiving a setting instruction of the master device and the slave device.
The method according to claim 7, wherein said master device displays said master device and said slave device according to said expanded or collapsed state or receiving setting instructions of said master device and said slave device Mode control includes

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

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

When it is detected that all of the slave devices in the slave device are in an 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.
The method according to claim 7, wherein said master device displays said master device and said slave device according to said expanded or collapsed state or receiving setting instructions of said master device and said slave device Mode control includes:

Receiving a touch operation signal on the master device and the slave device, the touch operation signal is a switching indication of the display mode, and the display mode includes one of the following: a four-screen display mode, a three-screen display mode, and a double Screen display mode, single screen display mode.
A 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 displays different display contents on a multi-screen interface corresponding to the current display mode.
A control device for a screen folding device, the screen folding device comprising: a master device and at least two slave devices; the master device being foldably connected to the slave device, the device comprising:

Obtaining a module, configured to acquire, by the master device, an expanded or collapsed state of the slave device;

And a control module configured to control, by the master device, the display mode of the master device and the slave device according to the expanded or collapsed state, or receiving a setting instruction of the master device and the slave device.
The apparatus of claim 11 wherein said control module comprises:

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

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

The third switching unit is configured to be set to a four-screen display mode, a three-screen display mode, a dual-screen display mode, or a single-screen display mode when detecting that all of the slave devices in the slave device are in an expanded state.
The apparatus of claim 11 wherein said control module comprises:

a fourth switching unit, configured to receive a touch operation signal on the master device and the slave device, where the touch operation signal is a switching indication of the display mode, and the display mode includes one of the following: a four-screen display mode , three-screen display mode, dual-screen display mode, single-screen display mode.
The apparatus according to claim 12 or claim 13, wherein

a display module, configured to be the four-screen display mode, the three-screen display mode, or the dual-screen display mode Different display contents are displayed on the multi-screen interface corresponding to the front display mode.