WO2017143862A1

WO2017143862A1 - Display device and control method therefor

Info

Publication number: WO2017143862A1
Application number: PCT/CN2016/113315
Authority: WO
Inventors: 刘伟
Original assignee: 广州视睿电子科技有限公司
Priority date: 2016-02-26
Filing date: 2016-12-30
Publication date: 2017-08-31
Also published as: CN105676700A; CN108873746A; CN105676700B; CN108873746B

Abstract

A display device and a control method therefor. The display device comprises: a first memory (1) configured to store a program required in a single-screen working status; a second memory (2) configured to store a program required in a multi-screen working status; a transmission port (3) configured to receive signals sent by other matched display devices; and a controller (4) configured to: determine, according to the signals received by the transmission port (3), whether the present display device is interconnected to other matched display devices (3); if yes, turn off the first memory (1) and turn on the second memory (2), so that the present display device is interconnected to other matched display devices to constitute a multi-screen device in a multi-screen working status; and if not, turn on the first memory (1) and turn off the second memory (2), so that the present display device operates independently as a single-screen device in a single-screen working status. The display device not only can operate independently but also can constitute a multi-screen device with other matched display devices. The two working statuses do not interfere with each other, and both can be achieved normally.

Description

Display device and control method of display device

Technical field

The present invention relates to the field of computer technologies, and in particular, to a display device and a control method of the display device.

Background technique

The early computer system mainly consisted of three parts: display, mainframe and input device. With the development of display technology, especially the liquid crystal display eliminated the picture tube, the computer manufacturer began to integrate the host into the display, and gradually appeared the computer in the prior art. One-piece machine, smart TV, smart interactive tablet and other display devices with computer functions; these display devices incorporate many technologies such as human-computer interaction, flat panel display, multimedia information processing and network transmission, which are commercial display and office in the information age. A preferred solution for interactive presentations such as teaching. In recent years, large-screen image display by splicing multiple display devices has been widely used, and its large-screen, multi-screen display and clear and realistic display effects make monitoring, security, conferences and other fields. The work efficiency has been greatly improved, and at the same time promoted the rapid progress of the technical level of these industries.

Common splicing large screens, that is, multi-screen devices, two or more display devices are fixedly connected together during the design process. Due to the large size, there are often many difficulties in the handling process; and in actual application, the large screen is spliced together. The frequency of use is not high, such as the large screen used in the conference room, which will cause the resources to be idle when there is no conference. Therefore, it is considered that a plurality of display devices are not fixedly connected during the design and production process, and the display devices are spliced together during use, and the program interconnection of the plurality of display devices is realized through the two-way communication connection line, so that each of the display devices can be transported separately. Display devices reduce the difficulty of transportation. However, such a display device can only be used as a separate whole machine if it can only be used in the splicing and interconnection, and is also a waste of resources. Since the display device has multiple working modes when splicing and interconnecting work (for example, multiple display devices can select screen expansion or copy display), when operating together, operating system, application software, UI (Use Interface, user interface), etc. The running elements are different from when they are working as a whole machine. These running elements are stored in the memory in the form of a program corresponding to the storage address; therefore, if the memory in the display device is placed in a program for interconnection, Can not be used as a separate machine, if you place the program as a whole machine, it may not work properly when connected. In the prior art, there is no display device that can be combined with other supporting display devices as a splicing large screen, and can work independently and operate normally, and a control method supporting the display device.

Summary of the invention

An object of an aspect of the present invention is to provide a multi-screen device that can be combined with other supporting display devices. The display device that can be used independently and can work independently, and the two working states are mutually undisturbed, can operate normally, and solves the problems in the prior art that the multi-screen device is difficult to handle, and the resources are idle and wasted.

In order to achieve the above object, the present invention provides a display device, including:

a first memory for storing a program required for a single screen operation state;

a second memory for storing a program required in a multi-screen operating state;

a transmission port for receiving signals sent by other supporting display devices;

a controller, configured to determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices; if yes, turning off the first memory, turning on the second memory, and causing the display device Interconnecting with other supporting display devices to form a multi-screen device, in a multi-screen working state; if not, turning on the first memory, turning off the second memory, so that the display device works independently as a single-screen device, in a single Screen working status.

Further, the controller is configured to determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices, specifically:

When the display device is powered on, the timing is performed;

Detecting whether the transmission port receives N times of interconnect signals within the first time threshold; if yes, determining that the display device is interconnected with other supporting display devices; if not, determining that the display device is not matched with other displays Device interconnection; where N ≥ 1.

Further, the transmission port is further configured to send an interconnection signal to other supporting display devices when the display device is powered on.

In one embodiment, the first memory is configured with a first chip select port, and the second memory is configured with a second chip select port;

The controller turns on the first memory by transmitting a valid first chip select signal to the first chip select port; the controller sends an invalid first chip select to the first chip select port Signaling to turn off the first memory;

The controller turns on the second memory by transmitting a valid second chip select signal to the second chip select port; the controller sends an invalid second chip select to the second chip select port Signaling to turn off the second memory.

In one embodiment, the display device further includes:

a first switching circuit for turning on or off the power of the first memory;

a second switching circuit, configured to turn on or off the power of the second memory;

The controller turns on the first memory by transmitting a valid first enable signal to the first switch circuit to turn on the first switch circuit to turn on the first memory; the controller Turning off the first memory by transmitting an invalid first enable signal to the first switch circuit to cause the first switch circuit to turn off power of the first memory;

The controller turns on the second memory by transmitting a valid second enable signal to the second switch circuit to turn on the second switch circuit to turn on the second memory; the controller The second memory is turned off by transmitting an invalid second enable signal to the second switch circuit to cause the second switch circuit to turn off the power of the second memory.

Further, the display device further includes:

a third memory for storing a program required for a single-screen working state of the backup;

a fourth memory for storing a program required for the multi-screen working state of the backup;

The controller is further configured to: after determining that the display device is not interconnected with other supporting display devices, if it is detected that the first memory is not working normally within a second time threshold, turning on the third memory;

The controller is further configured to: after determining that the display device is interconnected with other associated display devices, if the second memory is detected to be inoperable within a second time threshold, the fourth memory is turned on.

Preferably, the transmission port is a port that supports RS232 signal transmission.

Another object of the present invention is to provide a control method for a display device, which can be used as a multi-screen device in combination with other supporting display devices, and can work independently, and the two working states are mutually independent. Interference, can run normally.

In order to achieve the above object, the present invention provides a control method of a display device, including:

Receiving signals sent by other supporting display devices through the transmission port;

Determining, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices; if yes, turning off the first memory in the display device, and turning on the second memory in the display device to enable the display The device is interconnected with other supporting display devices to form a multi-screen device, and is in a multi-screen working state; if not, the first memory is turned on, and the second memory is turned off, so that the display device works independently as a single-screen device. Single screen working state;

Wherein, the first memory stores a program required for a single-screen working state, and the second memory stores a program required for a multi-screen working state.

Further, the control method of the display device further includes:

After determining that the display device is not interconnected with other supporting display devices, if it is detected that the first memory is not working normally within the second time threshold, turning on the third memory;

After determining that the display device is interconnected with other supporting display devices, if it is detected that the second memory does not work normally within the second time threshold, turning on the fourth memory;

Wherein, the third memory stores a program required for the backup single-screen working state, and the fourth memory stores a program required for the backup multi-screen working state.

Further, the determining, according to the signal received by the transmission port, whether the display device is compatible with other displays The device interconnections are specifically as follows:

When the display device is powered on, the timing is performed;

Detecting whether the transmission port receives N times of interconnect signals within the first time threshold; if yes, determining that the display device is interconnected with other supporting display devices; if not, determining that the display device is not matched with other displays Device interconnection; where N ≥ 1. .

The implementation of the present invention has the following beneficial effects:

The display device and the control method of the display device provided by the embodiment of the present invention are provided with two memories, and according to signals sent by other supporting display devices received by the transmission interface, determine whether the display device is interconnected with other supporting display devices, and further Determining whether to run the first memory or the second memory; since the two memories respectively store the programs required in the single-screen working state and the programs required in the multi-screen working state, that is, the operating system and application software in the single-screen working state The operating system, the application software, and the UI in the state of the UI and the multi-screen operating state are respectively stored in the two memories without interference; therefore, the display device provided by the present invention can be in a single-screen working state and independently work normally; Other supporting display devices form a multi-screen device in a multi-screen working state, running an interconnection program; and the two working states do not interfere with each other, and all can operate normally. The invention solves the problems of difficulty in transportation of multi-screen devices, waste of resources, and the like in the prior art.

DRAWINGS

1 is a block diagram showing the structure of a display device provided by the present invention;

2 is a schematic diagram of a first embodiment of a display device provided by the present invention;

3 is a schematic diagram of a second embodiment of a display device provided by the present invention;

4 is a schematic diagram of an embodiment of a first switching circuit in a second embodiment of the present invention;

FIG. 5 is a flow chart of a control method of a display device provided by the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, FIG. 1 is a structural block diagram of a display device according to the present invention. The display device includes:

a first memory 1 for storing a program required in a single-screen operating state;

a second memory 2 for storing a program required in a multi-screen operating state;

The transmission port 3 is configured to receive signals sent by other supporting display devices;

The controller 4 is configured to determine, according to the signal received by the transmission port 3, whether the display device is interconnected with other supporting display devices; if yes, turn off the first memory 1 and turn on the second memory 2 to make the display device and other The supporting display device interconnects to form a multi-screen device, and is in a multi-screen working state; if not, the first memory 1 is turned on, and the second memory 2 is turned off, so that the display device operates independently as a single-screen device and is in a single-screen working state.

The controller 4 is configured to determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices, specifically:

When the display device is powered on, the timing is performed;

Detecting whether the transmission port 3 receives N times of interconnection signals within the first time threshold; if yes, determining that the display device is interconnected with other supporting display devices; if not, determining that the display device is not associated with other display devices Interconnect; where N ≥ 1.

Further, the transmission port 3 is further configured to send an interconnection signal to other supporting display devices when the display device is powered on.

The display device provided by the present invention is equipped with a first memory 1 and a second memory 2, and the operating system, application software, UI and the like in a single-screen working state are stored in the first memory 1 in the form of a program, and the multi-screen is in a working state. Operating system, application software, UI, etc. are stored in the second memory 2 in the form of a program;

When the display device is interconnected with other supporting display devices, the controller 4 performs timing after being turned on, and since the transmission port 3 for transmitting and receiving signals is provided, if the other supporting display devices are turned on, the display device is turned on. Sending an interconnection signal, the transmission port 3 can receive the interconnection signal, and the controller 4 detects that the transmission interface 3 receives the interconnection signal within the first time threshold, and determines that the display device is interconnected with other supporting display devices, and then The first memory 1 is turned off, and the second memory 2 is turned on to interconnect the display device with other supporting display devices to form a multi-screen device, which is in a multi-screen working state;

In order to improve the reliability of the interconnection, it may be determined that when the interconnection signal is received multiple times within the first time threshold, the display device is determined to be interconnected with other supporting display devices, that is, the first time threshold is received. The N times interconnection signal determines that the display device is interconnected with other supporting display devices; while the controller performs timing after the power is turned on, the display device also sends an interconnection signal to other supporting display devices through the transmission port 3 to ensure Other supporting display devices can also receive interconnection signals, so that other supporting display devices are also in multi-screen working state;

When the display device is not interconnected with other supporting display devices, after the display device is powered on, the controller 4 performs timing, and does not receive an interconnection signal within the first time threshold, so the controller 4 can determine that the display device is not Interconnected with other supporting display devices, and then the first memory 1 is turned on, and the second memory 2 is turned off, so that the display device operates independently as a single-screen device and is in a single-screen working state.

Referring to FIG. 2, FIG. 2 is a schematic diagram of a first embodiment of a display device provided by the present invention; in this embodiment, a transmission end Port 3 is a UART port, a first chip select port 11 is disposed on the first memory 1, and a second chip select port 21 is disposed on the second memory 2;

The controller 4 turns on the first memory 1 by transmitting a valid first chip select signal to the first chip select port 11; and turns off the first memory 1 by transmitting an invalid first chip select signal to the first chip select port 11. The second memory 2 is turned on by transmitting a valid second chip select signal to the second chip select port 21; the second memory 2 is turned off by transmitting an invalid second chip select signal to the second chip select port 21.

When the display device determines that it is in a single-screen working state or a multi-screen working state, the display device starts to work, and the display device is equipped with a central processing unit 7, in the process of operation, the central processing unit 7 of the display device sends the address to the address bus. The address bus is divided into two, respectively connecting the first memory 1 and the second memory 2. Since only one memory is turned on, only one memory reacts to the address sent by the central processing unit 7, and the program corresponding to the address is transmitted back to Central processor 7.

In the case that the central processor 7 detects the same user input information, since the memory opened in the single-screen working state and the multi-screen working state is different, the called program is different, and the executed operation is different, and the multi-screen working state is different. Display devices have a wealth of information sharing capabilities. For example, when the user performs volume adjustment by means of a remote controller, a keyboard or a touch screen, if the first memory 1 is turned on in the display device, the central processor 7 obtains the program returned by the first memory 1 and performs the operation only for the display device. If the second memory 2 is turned on in the display device, that is, in the multi-screen operation state, the operation performed by the central processor 7 after obtaining the program returned by the second memory 2 is not only the volume adjustment of the display device, but also The information that needs volume adjustment is transmitted to other supporting display devices for synchronization adjustment; in the dual-screen working state, based on the program in the second memory 2, screen copying or expansion can also be performed, that is, the display device and other supporting displays are displayed. The device displays the same image or expands and merges into one screen display image; the display device can also cooperate with other supporting display devices to realize channel switching. For example, the current display device and a matching display device extend an image display when the user Matching display when channel switching is performed on the display device The device displays the current image by itself, and the display device can perform other operations of the user.

Further, the display device in this embodiment further includes:

a third memory 5 for storing a program required for a single-screen working state of the backup;

a fourth memory 6 for storing a program required for the backup multi-screen working state;

The controller 4 is further configured to: after determining that the display device is not interconnected with other associated display devices, if it is detected that the first memory 1 is not working properly within a second time threshold, turning on the third memory The controller 4 is further configured to: after determining that the display device is interconnected with other associated display devices, if it is detected that the second memory 2 is not working properly within the second time threshold, then turning on the fourth Memory 6.

In this embodiment, when the display device is in a single-screen working state, the first memory 1 is damaged, and cannot be centered. The address sent by the processor 7 reacts, and the controller 4 detects that the first memory 1 is not working normally within the second time threshold by connecting with the central processing unit 7, and then turns on the third memory 5, and the third memory 5 will back up the single The program required in the screen working state is transmitted back to the central processing unit, that is, the first memory 1 is damaged and the backup program can be operated.

When the display device is in the multi-screen operating state, and the second memory 2 is damaged and cannot respond to the address sent by the central processor, the controller 4 detects that the second memory is within the second time threshold by connecting with the central processor 7. 2 can not work normally, then open the fourth memory 6, the fourth memory 6 returns the program required in the backup multi-screen working state back to the central processor, that is, after the second memory 2 is damaged, the backup program can be run. purpose.

Further, if the program in the memory needs to be upgraded, for example, the first memory 1 needs to be upgraded through an external storage medium, the central processor 7 reads the program pair in the storage medium in the single-screen working state. The program of the memory 1 is upgraded. After the upgrade is completed, the controller 4 turns off the first memory 1, opens the third memory 5, and the central processor 7 upgrades the backup program. The upgrade principle of the second memory 2 is similar to that of the first memory, and will not be described in detail herein.

Referring to FIG. 3, FIG. 3 is a schematic diagram of a second embodiment of a display device provided by the present invention. The difference between this embodiment and the foregoing embodiment is that the transmission port 3 is a port that supports RS232 signal transmission. For example, the transmission port 3 can be For the RS232 port, it can also be a port for the RS232 signal transmission formed by the UART to RS232 circuit 10 through the UART port; when the display device size is large or the controller is set, the controller 4 of the display device and other supporting devices are caused. When the distance of the controller of the display device exceeds 10cm, the RS232 signal transmission can ensure the reliability of long-distance transmission;

In addition, in this embodiment, the display device further includes:

a first switching circuit 8 for turning on or off the power of the first memory;

a second switching circuit 9 for turning on or off the power of the second memory;

The controller 4 turns on the first memory by transmitting a valid first enable signal to the first switch circuit 8 to turn on the first switch circuit 8 to turn on the power supply VCC of the first memory 1. The controller 4 sends the invalid first enable signal to the first switch circuit 8 to cause the first switch circuit 8 to turn off the power of the first memory 1 to turn off the first Memory 1;

The controller 4 turns on the second memory by transmitting a valid second enable signal to the second switch circuit 9 to turn on the second switch circuit 9 to turn on the power source VCC of the second memory 2 2; the controller 4 sends the invalid second enable signal to the second switch circuit 9 to cause the second switch circuit 9 to turn off the power supply VCC of the second memory 2, and close the first Two memory 2.

Referring to FIG. 4, FIG. 4 is a schematic diagram of an embodiment of a first switching circuit in a second embodiment of the present invention; the first switching circuit 8 includes an enable terminal EN, an output terminal OUT, a power connection terminal, and a field effect. The tube Q1, the transistor Q2, the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, and the second capacitor C2. Specifically, the enable terminal EN is used to connect to the controller 4, the output terminal OUT is used to connect to the first memory 1, and the power connection terminal is used to connect the power source VCC; The source connection end is connected to the first end of the first resistor R1, the enable end EN is connected to the first end of the third resistor, the second end of the third resistor is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected The second end of the first resistor R1, the collector of the transistor Q2 is also connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the gate of the FET Q1, and the source of the FET Q1 is connected. a power connection end, the drain of the FET is connected to the output terminal OUT;

In this embodiment, the effective first enable signal is a high level signal, and when the controller 4 sends a valid first enable signal to the first switch circuit 8, even if the enable terminal EN is at a high level, the transistor Q2 is turned on. At this time, the gate of the FET Q2 is grounded through the second resistor R2, the source is connected to the power source VCC, and the voltage drop between the source and the gate is large, so the FET Q1 is turned on, and the first memory 1 is powered. The first memory 1 is turned on; the invalid first enable signal is low level, when the enable terminal EN is low level, the transistor Q2 is turned off, and the gate of the field effect transistor Q2 is connected to the first resistor R1 through the second resistor R2. The power source VCC, the source is connected to the power source VCC, and the voltage drop between the source and the gate is small. Therefore, the FET Q1 and the first memory 1 are not powered, so the first memory 1 is turned off. The circuit structure of the second switching circuit 9 is the same as that of the first switching circuit 8, and will not be described herein.

Referring to FIG. 5, FIG. 5 is a flowchart of a method for controlling a display device according to the present invention; the control method of the display device includes:

S1, receiving a signal sent by another supporting display device through the transmission port;

S2. Determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices.

S3. If yes, the first memory in the display device is turned off, and the second memory in the display device is turned on, so that the display device is interconnected with other supporting display devices to form a multi-screen device, and is in a multi-screen working state;

S4. If no, the first memory is turned on, and the second memory is turned off, so that the display device works independently as a single-screen device, and is in a single-screen working state;

Wherein, the first memory stores a program required for a single-screen working state, and the second memory stores a program required for a multi-screen working state. The display device is the display device provided by the above embodiment.

In a specific implementation, step S2 may include:

When the display device is powered on, the timing is performed;

Using the control method of the display device, the controller in the display device determines whether the display device is interconnected with other supporting display devices according to the signal received by the transmission port, and determines which memory to use according to the determination result, and therefore, the display device is no matter where In a working state, a dedicated memory can be used, and there is no problem that the two working states interfere with each other and work abnormally.

Specifically, the control method of the display device further includes:

The display device equipped with the third memory and the fourth memory, by using the display control method, can also realize that when the first memory or the second memory is damaged, a backup program can be run, which improves the reliability of the operation of the display device.

The display device and the control method of the display device provided by the embodiment of the present invention are equipped with two memories, and determine whether the display device is interconnected with other supporting display devices according to signals sent by other supporting display devices received by the transmission interface, and then Determining whether to run the first memory or the second memory; since the two memories respectively store the programs required in the single-screen operating state and the programs required in the multi-screen operating state, the display device provided by the present invention can be operated in a single screen. The state is independent and normal working; and it can be combined with other supporting display devices to form a multi-screen device in a multi-screen working state and run an interconnection program; and the two working states do not interfere with each other and can operate normally. The invention solves the problems of difficulty in transportation of multi-screen devices, waste of resources, and the like in the prior art.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and modifications without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims

A display device, comprising:

a first memory for storing a program required for a single screen operation state;

a second memory for storing a program required in a multi-screen operating state;

a transmission port for receiving signals sent by other supporting display devices;

a controller, configured to determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices; if yes, turning off the first memory, turning on the second memory, and causing the display device Interconnecting with other supporting display devices to form a multi-screen device, in a multi-screen working state; if not, turning on the first memory, turning off the second memory, so that the display device works independently as a single-screen device, in a single Screen working status.
The display device according to claim 1, wherein the controller is configured to determine, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices, specifically:

When the display device is powered on, the timing is performed;

Detecting whether the transmission port receives N times of interconnect signals within the first time threshold; if yes, determining that the display device is interconnected with other supporting display devices; if not, determining that the display device is not matched with other displays Device interconnection; where N ≥ 1.
The display device as claimed in claim 2, wherein the transmission port is further configured to send an interconnection signal to other associated display devices when the display device is powered on.
The display device according to any one of claims 1 to 3, wherein the first memory is configured with a first chip select port, and the second memory is configured with a second chip select port;

The controller turns on the first memory by transmitting a valid first chip select signal to the first chip select port; the controller sends an invalid first chip select to the first chip select port Signaling to turn off the first memory;

The controller turns on the second memory by transmitting a valid second chip select signal to the second chip select port; the controller sends an invalid second chip select to the second chip select port Signaling to turn off the second memory.
The display device according to any one of claims 1 to 3, wherein the display device further comprises:

a first switching circuit for turning on or off the power of the first memory;

a second switching circuit, configured to turn on or off the power of the second memory;

The controller causes the first switch circuit by transmitting a valid first enable signal to the first switch circuit Turning on the power of the first memory to turn on the first memory; the controller, by transmitting an invalid first enable signal to the first switch circuit, to cause the first switch circuit to turn off the a power source of the first memory, turning off the first memory;

The controller turns on the second memory by transmitting a valid second enable signal to the second switch circuit to turn on the second switch circuit to turn on the second memory; the controller The second memory is turned off by transmitting an invalid second enable signal to the second switch circuit to cause the second switch circuit to turn off the power of the second memory.
The display device according to any one of claims 1 to 3, wherein the display device further comprises:

a third memory for storing a program required for a single-screen working state of the backup;

a fourth memory for storing a program required for the multi-screen working state of the backup;

The controller is further configured to: after determining that the display device is not interconnected with other supporting display devices, if it is detected that the first memory is not working normally within a second time threshold, turning on the third memory;

The controller is further configured to: after determining that the display device is interconnected with other associated display devices, if the second memory is detected to be inoperable within a second time threshold, the fourth memory is turned on.
The display device according to any one of claims 1 to 3, wherein the transmission port is a port that supports RS232 signal transmission.
A control method for a display device, comprising:

Receiving signals sent by other supporting display devices through the transmission port;

Determining, according to the signal received by the transmission port, whether the display device is interconnected with other supporting display devices; if yes, turning off the first memory in the display device, and turning on the second memory in the display device to enable the display The device is interconnected with other supporting display devices to form a multi-screen device, and is in a multi-screen working state; if not, the first memory is turned on, and the second memory is turned off, so that the display device works independently as a single-screen device. Single screen working state;

Wherein, the first memory stores a program required for a single-screen working state, and the second memory stores a program required for a multi-screen working state.
The control method of the display device according to claim 8, wherein the control method of the display device further comprises:

After determining that the display device is not interconnected with other associated display devices, if the second time threshold is detected The first memory does not work normally, and the third memory is turned on;

After determining that the display device is interconnected with other supporting display devices, if it is detected that the second memory does not work normally within the second time threshold, turning on the fourth memory;

Wherein, the third memory stores a program required for the backup single-screen working state, and the fourth memory stores a program required for the backup multi-screen working state.
The control method of the display device according to claim 8 or 9, wherein the determining whether the display device is interconnected with other supporting display devices according to the signal received by the transmission port is specifically:

When the display device is powered on, the timing is performed;

Detecting whether the transmission port receives N times of interconnect signals within the first time threshold; if yes, determining that the display device is interconnected with other supporting display devices; if not, determining that the display device is not matched with other displays Device interconnection; where N ≥ 1.