CN113778363A - Display terminal, cascade system thereof and control method - Google Patents
Display terminal, cascade system thereof and control method Download PDFInfo
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- CN113778363A CN113778363A CN202111089754.5A CN202111089754A CN113778363A CN 113778363 A CN113778363 A CN 113778363A CN 202111089754 A CN202111089754 A CN 202111089754A CN 113778363 A CN113778363 A CN 113778363A
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
Abstract
The embodiment of the application relates to a display terminal, a cascade system and a control method thereof, wherein the cascade system of the display terminal comprises: a first main control unit and a second main control unit; the first main control unit comprises a first interface, a second interface, a switch module, a concentrator module and a system-on-chip module; the first interface is used for receiving network communication signals; the switch module is used for transmitting the network communication signal to the hub module in a target working state and transmitting the network communication signal to the second interface in a non-target working state; the hub module is used for transmitting the network communication signal to the second interface and the system-on-chip module; the system-on-chip module is used for outputting a first data signal according to the network communication signal; the second interface is used for transmitting network communication signals to the second main control unit. According to the embodiment of the application, the independent cascade of the main control units in the display terminal is realized, and the robustness of a cascade system of the display terminal is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a display terminal, a cascade system thereof and a control method thereof.
Background
The multi-input display terminal is a display terminal capable of simultaneously displaying a plurality of input pictures, and comprises a plurality of System on Chip (SoC) main control units, wherein each main control unit runs an independent operating System and an independent application program and displays the operating System and the application program in different areas of the same screen.
Specifically, in the multi-input display terminal product, one display screen can simultaneously display the contents of a plurality of main control units, as shown in fig. 1, one display screen displays input pictures of 4 main control units, and if a master-slave mode is adopted, the host needs to complete the configuration of the whole system, so that the working state of the host is a necessary condition for the multi-input display terminal to work, which increases the working Time of the host, reduces the Mean Time Between Failure (MTBF) of the whole machine, i.e., reduces the service life of the whole machine, and brings inconvenience to the flexible use of a user. Therefore, the existing multi-input display terminal product usually adopts a non-master-slave mode, such as a parallel mode, and each host has the same function and is independent from each other.
However, in the multi-input display terminal product, if each main control unit needs to be separately introduced into the network, one display terminal may have a plurality of network cables connected, which causes a messy wiring and is inconvenient to move.
Disclosure of Invention
In view of this, to solve the above technical problems or some technical problems, embodiments of the present application provide a display terminal, a cascade system thereof, and a control method thereof.
In a first aspect, an embodiment of the present application provides a cascade system of a display terminal, including: a first main control unit and a second main control unit; the first main control unit comprises a first interface, a second interface, a switch module, a hub module and a system-on-chip module; the first interface is used for receiving network communication signals; the switch module is used for transmitting the network communication signal to the hub module in the target working state and transmitting the network communication signal to the second interface in the non-target working state; the hub module is used for transmitting the network communication signal to the second interface and the system-on-chip module; the system-on-chip module is used for outputting a first data signal according to the network communication signal; the second interface is used for transmitting the network communication signal to the second main control unit; the second master control unit is configured to output a second data signal based on the network communication signal.
In a possible implementation, the first master control unit further includes a logic control module; the logic control module is used for providing a control signal to the control end of the switch module under the control of the power supply signal end; the control signal is divided into a first control signal and a second control signal, the first control signal is used for controlling the switch module to be in a target working state, and the second control signal is used for controlling the switch module to be in a non-target working state.
In one possible implementation, the logic control module includes a first resistor, a second resistor, a third resistor, and a first transistor; the first pole of the first transistor is connected with the power supply signal end, the second pole of the first transistor is connected with the first end of the first resistor and the first end of the second resistor, the third pole of the first transistor is connected with the control end of the switch module and the first end of the third resistor, and the second end of the third resistor is connected with the reference ground.
In one possible embodiment, the switch module comprises a first switch and a second switch; a common end of the first switch is connected with the first interface, a first end of the first switch is connected with a first port of the concentrator module, and a second end of the first switch is connected with a second end of the second switch; the common end of the second switch is connected with the second interface, and the first end of the second switch is connected with the second port of the concentrator module; and the third port of the hub module is connected with the system-on-chip module.
In a possible embodiment, the system-on-chip module is further configured to detect that the switch module is controlled to be in the target operating state when the communication demand signal is received.
In a possible implementation, the cascade system of the display terminal further includes: a signal processor and a display screen; the signal processor is used for outputting a corresponding display signal to the display screen according to the received audio and video signal, wherein the audio and video signal comprises the first data signal and/or the second data signal; the display screen is used for displaying according to the display signal.
In one possible implementation, the second master control unit includes a third interface and a target system-on-chip module; the third interface is configured to receive the network communication signal and provide the network communication signal to the target system-on-chip module; the target system-on-chip module is configured to output the second data signal to the signal processor according to the network communication signal.
In one possible embodiment, the first switch and the second switch are both single pole double throw switches.
In a second aspect, an embodiment of the present application provides a method for controlling a display terminal, which is used to control the cascade system according to any one of the first aspect, and includes: monitoring a communication demand signal of a first main control unit after the first main control unit is powered on; if the communication demand signal is monitored, controlling a switch module in the first main control unit to be in a target working state; and if the communication demand signal cannot be monitored, controlling a switch module in the first main control unit to be in a non-target working state. The switch module is used for transmitting a network communication signal to the hub module of the first main control unit in the target working state and transmitting the interface to the second interface of the first main control unit in the non-working state; the network communication signal is a signal received by the first main control unit through a first interface, the hub module is used for transmitting the network communication signal to the second interface and a system-on-chip module of the first main control unit, the system-on-chip module is used for outputting a first data signal corresponding to the first main control unit according to the network communication signal, the second interface is used for transmitting the network communication signal to a second main control unit of the display terminal, and the second main control unit is used for outputting a corresponding second data signal based on the network communication signal.
In a third aspect, an embodiment of the present application provides a display terminal, including: a cascade system of display terminals as described in any of the above first aspects.
According to the display terminal, the cascade system and the control method thereof, independent cascade of each main control unit in the display terminal is achieved through the first interface, the second interface and the switch module in the main control unit, different connection topologies can be formed by switching different states of the switch module, the problem that an existing cascade scheme depends on an external concentrator or an internal structure and adopts a master-slave structure is solved, and the robustness of the cascade system of the display terminal is improved.
Drawings
FIG. 1 is a diagram illustrating an example of displaying the contents of 4 master control units via a display screen;
FIG. 2 is a schematic diagram of a cascade of multi-input display terminals in the prior art;
fig. 3 is a schematic connection diagram of a first main control unit and a second main control unit in a cascade system of a display terminal according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a main control unit in the embodiment of the present application;
fig. 5 is a schematic structural diagram of a master control unit in an example of the present application;
FIG. 6 is a schematic diagram of a logic control module coupled to a switch module according to an example of the present application;
fig. 7 is a schematic structural diagram of a display terminal according to an example of the present application;
fig. 8 is a flowchart illustrating a control method of a display terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In actual processing, the display terminal cascade scheme is mostly applied to a centralized control (referred to as centralized control for short) scene. Centralized control applications are typically implemented via interfaces such as RS485, ethernet (ethernet) interface, RS232 ring in and ring out, etc. The RS485 is a bus structure, a plurality of devices are connected in parallel on one bus, and data communication is realized through broadcast data and address matching; the RS232 adopts two physical interfaces, one of which is responsible for data input and the other of which is responsible for data ring-out, i.e., ring-in and ring-out functions.
In addition, a common cascading scheme also has an ethernet interface, and different network terminals are combined into a local area network mainly through a hub, and cascading control is realized through an Internet Protocol (IP) address. Because the ethernet interface is a stock interface of the current display terminal, and the transmission rate of the ethernet interface is faster than that of RS485 and RS232, the current mainstream centralized control equipment mostly adopts the ethernet interface, for example, a cascade scheme of the ethernet interface is adopted in products such as a commonly used spliced screen and a smart all-in-one machine. The splicing screen is generally realized through external splicing control equipment; the smart all-in-one machine adopts a master-slave structure, namely a smart all-in-one machine mainboard is a host, the host is responsible for power supply and configuration of a concentrator, and the slave equipment is only used as a terminal to join a network, for example, an internal android mainboard in the smart all-in-one machine is used as master control equipment to control power supply and configuration of cascade equipment, and an external Open Pluggable Specification (OPS) module is used as input equipment, namely the slave equipment, so that the slave equipment cannot work independently as long as the master equipment has problems.
An existing multi-input display terminal may use a standard OPS module as a main control unit, and each OPS module may include a High Definition Multimedia Interface (HDMI) output, a display Interface (DP) output, a Universal Serial Bus (USB), a Universal Asynchronous Receiver/Transmitter (UART), an audio output, and other functions. Under the condition that a network communication interface of a multi-input display terminal is universal, only one network cable needs to be introduced, and a plurality of main control units in the multi-input display terminal can be simultaneously connected into a network.
For example, in the case that the Network interface of the master control unit is an RJ45 interface and each master control unit includes an independent Network interface, an ethernet HUB (HUB) may be connected to the master control unit, as shown in fig. 2, 1 RJ45 interface is led out through the HUB as a Local Area Network (LAN) interface, and the Network interfaces of the plurality of master control units are equal to each other, so that only the Network cable of the internet needs to be connected to the LAN interface, and the plurality of master control units can be connected to the internet. Specifically, each main control unit is accessed to a concentrator, and is equal to each other to form a local Area Network, and a LAN interface is accessed to an upper Network as a Wide Area Network (WAN) interface, and an internal local Area Network can adopt a bridging scheme to obtain an IP address of a public Network; or a routing mode is adopted, the hub acquires a public network IP address, and each internal main control unit can acquire respective local area network IP addresses such as 192.168.1.XXX and the like through a Dynamic Host Configuration Protocol (DHCP) server, so that the multi-input terminal can realize a cascade control function through IP address addressing. Independent concentrator modules are added in the mode, the concentrator modules are incorporated into the display terminal, a plurality of internal main control units are connected with the HUB, power supply and wiring of an external concentrator are reduced, the concentrator is attractive and reliable and convenient to move, networks of the main control units are independent of one another, independent work can be achieved, and the framework is simple. However, the hub module acts as a displaced network relay, and once the hub fails, the entire network will fail. The video processor can be connected with a logic board (TCON) of the display screen through the display interface, so that the display screen can display according to the display signal output by the video processor.
One of the core concepts of the embodiments of the present application is to provide a new cascade system of a display terminal based on the problem that the existing cascade scheme depends on an external hub or an internal structure to adopt a master-slave structure, wherein independent cascade is implemented through a first interface, a second interface and a switch module in a master control unit, and different connection topologies can be formed by switching different states of the switch module, so as to improve the system robustness of the display terminal.
For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.
In this embodiment, the cascade system of the display terminal may include: a first master unit 310 and a second master unit 320, as shown in fig. 3. The first main control unit 310 includes a first interface 311, a second interface 312, a switch module 313, a hub module, and a system-on-chip module 315; the first interface 311 is used for receiving network communication signals; the switch module 313 is configured to transmit the network communication signal to the hub module 314 in the target operation state and transmit the network communication signal to the second interface 312 in the non-target operation state; the hub module 314 is configured to transmit the network communication signal to the second interface 312 and the system-on-chip module 315; the system-on-chip module 315 is configured to output a first data signal according to the network communication signal; the second interface 312 is used for transmitting the network communication signal to the second master control unit 320; the second master control unit 320 is configured to output a second data signal based on the network communication signal.
Specifically, the cascade system of the display terminal in the embodiment of the present application may include two or more main control units in cascade. In the embodiment of the present application, a first master unit of any two master units in the cascade may be used as the first master unit 310, and another master unit may be used as the second master unit 320. When the first main control unit 310 operates, in a target operating state, the switch module 313 in the first main control unit 310 may transmit the network communication signal received by the first interface 311 to the hub module 314, so as to transmit the received network communication signal to the second interface 312 and the system-on-chip module 315 through the hub module 314, so that the system-on-chip module 315 may output a first data signal according to the network communication signal, and simultaneously may transmit the network communication signal to the second main control unit 320 through the second interface 312, so that the second main control unit 320 may output a second data signal based on the network communication signal, thereby implementing a multi-input function of the display terminal. The first data signal may refer to a data signal of the first main control unit 310, for example, may be an audio/video signal output by the first main control unit 310; the second data signal may refer to a data signal of the second master control unit 320, such as an audio/video signal output by the second master control unit 320. When the first main control unit 310 is in a non-target operating state, for example, when the first main control unit 310 is in a non-operating state or a short-circuit state, the switch module 313 in the first main control unit 310 may transmit the network communication signal received by the first interface 311 to the second interface 312, so as to output the network communication signal to the second main control unit 320 through the second interface 312, so that the second main control unit 320 may output a second data signal based on the network communication signal, thereby ensuring the access of the second main control unit 320, enabling the system of the display terminal to still operate normally, and improving the robustness of the system cascade.
It can be seen that, in the cascade system of the display terminal provided in the embodiment of the present application, the first interface 311 and the second interface 312 in the first main control unit 310 are used to implement independent cascade between the main control units in the display terminal, and in the target working state, the switch module 313 can transmit the network communication signal received by the first interface 311 to the hub module 314, so as to transmit the network communication signal to the second interface 312 through the hub module 314, and in the non-target working state, the switch module 313 can transmit the network communication signal received by the first interface 311 to the second interface 312, that is, the connection state of the switch module 313 is switched according to different states, so as to form different connection topologies, thereby solving the problem that the existing cascade scheme depends on an external hub or adopts a master-slave structure inside the display terminal, which results in poor robustness of the cascade scheme of the multi-input display terminal, and the robustness of the system is improved.
In a specific implementation, the switch module 313 in each first main control unit 310 may include one or more switches, so that the first interface 311 and the second interface 312 may be connected to the hub module through the switches in the switch module 313, so that different connection topologies can be formed based on different connection states of the switches. On the basis of the foregoing embodiment, optionally, the switch module 313 in the embodiment of the present application may include: a first switch SW1 and a second switch SW2, as shown in fig. 4, a common terminal of the first switch SW1 is connected to the first interface 311, a first terminal of the first switch SW1 is connected to a first port of the hub module, and a second terminal of the first switch SW1 is connected to a second terminal of the second switch SW 2; a common terminal of the second switch SW2 is connected to the second interface 312, and a first terminal of the second switch SW2 is connected to the second port of the hub module; the third port of the hub module is connected to the system-on-chip module 315. The first switch SW1 and the second switch SW2 may have different connection states, for example, when the common terminal of the first switch SW1 and the second switch SW2 is connected to the first terminal, the switch module 313 may be in the target operation state, and when the common terminal of the first switch SW1 and the second switch SW2 is connected to the second terminal, the switch module 313 may be in the non-target operation state. Optionally, the first switch SW1 and the second switch SW2 may be single-pole double-throw switches, such as a single-pole double-throw electronic switch SW, so that the switch module 313 can be in different operating states.
In the actual processing, the internal cascade state of the main control unit can be switched through the internal hardware control of the main control unit or the SoC control in the main control unit. Thus, in an alternative embodiment of the present application, the first master control unit 310 may further include a logic control module 316. The logic control module 316 is configured to provide a control signal to the control terminal of the switch module 313 under the control of the power supply signal terminal. The control signal is divided into a first control signal and a second control signal, the first control signal is used for controlling the switch module 313 to be in a target working state, and the second control signal is used for controlling the switch module 313 to be in a non-target working state.
Specifically, in each first master control unit, a control signal may be provided to the control terminal of the switch module 313 through the logic control module 316, so that the switch module 313 may switch states according to the control signal, and the switch module 313 may be in a corresponding state. For example, in the case that the first switch SW1 and the second switch SW2 in the switch module 313 are both single-pole double-throw electronic switches SW, as shown in fig. 5, if the common terminal COM and the second terminal B of the single-pole double-throw electronic switch SW are normally closed and the common terminal COM is disconnected from the first terminal a, when the control terminal input of the single-pole double-throw electronic switch SW is floating or at a low level L, for example, when the logic control module 316 provides a second control signal to the control terminal of the switch module 313 under the control of the power supply signal terminal, the common terminal COM and the second terminal B of the single-pole double-throw electronic switch SW are connected by default, so that the switch module 313 is in a non-target operating state, and thus the first interface 311 and the second interface 312 are both disconnected from the hub module 314, that is the network communication interface is disconnected from the hub module, and a loop-in loop-out Bypass (Bypass) is realized; when the control end input of the single-pole double-throw electronic switch SW is at the high level H, that is, when the logic control module 316 provides the first control signal to the control end of the switch module 313 under the control of the power supply signal end, the common end COM of the single-pole double-throw electronic switch SW is disconnected from the second end B, and the common end COM is connected with the first end a, so that the switch module 313 is in the target working state, and thus the first interface 311 and the second interface 312 are both connected with the hub module 314, that is, the network communication interface is connected to the hub module 314, and the hub connection mode is realized. It can be seen that, when the first main control unit 310 operates, the two RJ45 interfaces (i.e. the first interface 311 and the second interface 312) in the first main control unit 310 may be connected to the first terminal a through the common terminal COM of the single-pole double-throw electronic switch SW, so as to implement interconnection with the HUB in the HUB module, so that the two RJ45 interfaces and the SoC in the system-on-chip module 315 form a local area network; when the first main control unit 310 does not work, the two RJ45 can be connected with the second terminal B through the common terminal COM of the single-pole double-throw electronic switch SW, so that the two RJ45 interfaces are directly connected, and at this time, the HUB in the HUB module does not work.
In summary, the cascade system of the display terminal provided in the embodiment of the present application can still work normally when a certain main control unit is guaranteed to be accessed but does not work (for example, when the main control unit is not powered on) or has a problem in control, thereby improving the robustness of system cascade.
In addition, the first main control unit 310 and the second main control unit 320 in this embodiment of the application may both have functions of powering on and accessing the HUB and powering off the Bypass, that is, the functions of the cascaded main control units in the display terminal are the same, so that the standardized design of the main control units can be realized, the types of accessories are reduced, and the universality of the system is improved.
It should be noted that the system-on-chip module 315 in the master control unit may be formed by one or more socs, which is not specifically limited in this embodiment of the application. The HUB module 314 may include one or more HUBs, the first switch SW1 in the switch module 313 may include one or more switches, and the second switch SW2 in the switch module 313 may include one or more switches, which are not limited in this embodiment.
Further, to reduce the cost, the last main control unit cascaded in the display terminal may be composed of an interface and system-on-chip module 315. Therefore, in an optional embodiment of the present application, the second master unit 320 may include a third interface and a target system-on-chip module; the third interface is configured to receive the network communication signal and provide the network communication signal to the target system-on-chip module; the target system-on-chip module is configured to output the second data signal to the signal processor according to the network communication signal. Specifically, in the embodiment of the present application, a main control unit including two network interfaces (i.e., a first interface 311 and a second interface 312), a switch module 313, and a hub module 314 in each cascaded main control unit in the display terminal may be determined as a first main control unit 310, and a main control unit including only one interface and a system-on-chip module 315 may be determined as a second main control unit 320, where the second main control unit 320 is a last cascaded main control unit in the display terminal. As can be seen, the cascaded master control unit of the display terminal in the embodiment of the present application may include two or more cascaded first master control units 310 and one cascaded second master control unit 320. It should be noted that the target system-on-chip module refers to a system-on-chip module of the last cascaded master control unit in the display terminal.
In an alternative embodiment of the present application, the logic control module 316 may include a first resistor R1, a second resistor R2, a third resistor R3, and a first transistor Q1; a first pole of the first transistor Q1 is connected to the power supply signal terminal, a second pole of the first transistor Q1 is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2, a third pole of the first transistor Q1 is connected to the control terminal of the switch module 313 and the first terminal of the third resistor R3, and a second terminal of the third resistor R3 is connected to ground. The third resistor R3 connected to the reference ground is used as a pull-down resistor, and before power is supplied, the pull-down resistor can be used for discharging, so that the control terminal is in a low level state, and further, the common terminals of the first switch SW1 and the second switch SW2 in the switch module 313 are both connected to the second terminal thereof, so that the network communication signal received by the first interface 311 can be transmitted to the second interface 312 through the first switch SW1 and the second switch SW2, and then output to another main control unit connected to the second interface 312 through the second interface 312.
In a specific implementation, the first transistor Q1 may be an Oxide Thin Film Transistor (OTFT) or a Metal Oxide Semiconductor field effect transistor (MOS), and is not limited herein. In specific implementation, the first pole and the third pole of the first transistor Q1 in this embodiment may be a source or a drain of the transistor, and their functions may be interchanged according to the type of the transistor and the input signal, and are not specifically distinguished herein; the second pole of the first transistor Q1 may be the gate of the transistor.
As an example of the present application, in the case that the first transistor Q1 is a MOS transistor, in combination with the above example, as shown in fig. 6, before power is supplied, the control terminal of the single-pole double-throw electronic switch SW in the switch module 313 and the reference ground can be connected through the third resistor R3, and a low level is output, so that the common terminal COM terminal is connected to the second terminal B; after power is supplied, a power supply of a power supply signal terminal VCC can form voltage division through a first resistor R1 and a second resistor R2, a high level is output at the grid electrode of an MOS transistor Q1, the MOS transistor Q1 is controlled to be conducted, so that the high level is input at the control terminal of a single-pole double-throw electronic switch SW, the common terminal COM of the single-pole double-throw electronic switch SW is connected with the first terminal A, system-on-chip modules in a plurality of main control units cascaded in a display terminal can output data signals according to received network communication signals, the display terminal can display according to the data signals input by the plurality of main control units, and the multi-input function of the display terminal is realized.
Further, the cascade system of the display terminal in the embodiment of the present application may further include: a signal processor. The signal processor may be connected to an output terminal of the system-on-chip module in the main control unit, so as to receive an audio/video signal output by the main control unit through the system-on-chip module, such as a first data signal provided by the first main control unit 310 and/or a second data signal provided by the second main control unit 320, and output the audio/video signal to the display screen. Optionally, the cascade system of the display terminal in the embodiment of the present application may further include: a display screen. The signal processor is used for outputting a corresponding display signal to the display screen according to the received audio and video signal, wherein the audio and video signal comprises the first data signal and/or the second data signal; the display screen is used for displaying according to the display signal.
In a specific implementation, the signal processor may be a video processor, and the video processor may display audio and video signals of a plurality of main control units in the terminal and output the audio and video signals to the display screen. For example, in the case that the display terminal includes the main control unit 1 to the main control unit 4, as shown in fig. 7, the video processor may be respectively connected to the main control unit 1, the main control unit 2, the main control unit 3, and the main control unit 4 through the display interface, so as to respectively receive the audio/video signal of the main control unit 1, the audio/video signal of the main control unit 2, the audio/video signal of the main control unit 3, and the audio/video signal of the main control unit 4 through the display interface, and perform encoding processing according to the received audio/video signal to obtain a corresponding display signal, and then output the display signal to the display screen through the display interface, so that the display screen can display according to the display signal, for example, the display screen corresponding to the main control unit 1 can be displayed according to the display signal corresponding to the audio/video signal of the main control unit 1, and the display screen corresponding to the main control unit 2 can be displayed according to the display signal corresponding to the audio/video signal of the main control unit 2, the display image corresponding to the main control unit 3 is displayed according to the display signal corresponding to the audio/video signal of the main control unit 3, and/or the display image corresponding to the main control unit 4 is displayed according to the display signal corresponding to the audio/video signal of the main control unit 4, as shown in fig. 1. The main control unit 1, the main control unit 2 and the main control unit 3 may be a first main control unit 310 including two RJ45 interfaces and a switch module 313; master control unit 4 may be a second master control unit 320 that includes an RJ45 interface as a third interface. One RJ45 interface in the main control unit 1 is used as a first interface in the first main control unit, and can be connected with a LAN interface of the display terminal, so that network communication signals of the LAN can be received.
In actual processing, in the embodiment of the present application, besides controlling the switching of the cascade state of the main control unit through the main control internal hardware, the switching of the cascade state may also be controlled in a software control manner, which is not specifically limited in the embodiment of the present application. Optionally, the system-on-chip module 315 in this embodiment may be further configured to detect that the switch module 313 is controlled to be in the target operating state when the communication requirement signal is detected. Wherein the communication requirement signal may indicate that the system-on-chip module 315 has a communication requirement. Specifically, after the first main control unit is powered on, the system-on-chip module 315 in the first main control unit is powered on and powered on. After the system-on-chip module 315 is started, if a communication requirement signal is detected, that is, when the system-on-chip module 315 has a communication requirement, the common terminal of the switch in the switch module 313 may be controlled to be connected to the first terminal a, that is, the COM terminal of the first switch SW1 in the switch module 313 is connected to the first terminal a of the first switch SW1, and the COM terminal of the second switch SW2 is connected to the first terminal a of the second switch SW2, so that the switch module 313 enters and is in a target working state; after communication, the common terminal of the switch in the switch module 313 may be disconnected from the first terminal a, that is, the COM terminal of the first switch SW1 in the switch module 313 is connected to the second terminal B of the first switch SW1, and the COM terminal of the second switch SW2 is connected to the second terminal B of the second switch SW2, so that the switch module 313 enters and is in the non-target operation state.
As an example of the present application, if the first master control unit is normally connected in the following manner: after the SoC is started, the common terminal COM of the single-pole double-throw electronic switch SW in the switch module 313 is controlled to be connected with the second terminal B, after the SoC of the first main control unit is started, the common terminal COM of the single-pole double-throw electronic switch SW in the switch module 313 can still be connected with the second terminal B, when the SoC has a communication requirement, namely when a communication requirement signal is detected by the SoC, the common terminal COM of the single-pole double-throw electronic switch SW can be controlled to be connected with the first terminal a, and after the communication, the common terminal COM of the single-pole double-throw electronic switch SW is disconnected from being connected with the first terminal a. In addition, when the SoC controls the first master control unit where the SoC is located to be powered off, the common terminal COM of the single-pole double-throw electronic switch SW in the switch module 313 may be connected to the second terminal B.
Optionally, an embodiment of the present application further provides a control method for a display terminal, which is used for controlling the cascade system according to any one of the foregoing embodiments. As shown in fig. 8, a method for controlling a display terminal provided in an embodiment of the present application may specifically include:
s801, after a first main control unit is powered on, monitoring a communication demand signal of the first main control unit;
s802, if the communication demand signal is monitored, controlling a switch module in the first main control unit to be in a target working state;
s802, if the communication demand signal cannot be monitored, controlling a switch module in the first main control unit to be in a non-target working state.
The switch module is used for transmitting a network communication signal to the hub module of the first main control unit in the target working state and transmitting the interface to the second interface of the first main control unit in the non-working state; the network communication signal is a signal received by the first main control unit through a first interface, the hub module is used for transmitting the network communication signal to the second interface and a system-on-chip module of the first main control unit, the system-on-chip module is used for outputting a first data signal corresponding to the first main control unit according to the network communication signal, the second interface is used for transmitting the network communication signal to a second main control unit of the display terminal, and the second main control unit is used for outputting a corresponding second data signal based on the network communication signal.
Specifically, after each first main control unit is powered on, the display terminal in the embodiment of the application may determine whether the first main control unit has a communication requirement by monitoring a communication requirement signal of the first main control unit, so that it may be determined that the first main control unit has the communication requirement when the communication requirement signal of the first main control unit is monitored, and then the system-on-chip module in the first main control unit may control the switch module of the first main control unit to be in the target working state, so that the switch module of the first main control unit may transmit the received network communication signal to the hub module, so as to transmit the received network communication signal to the second interface and the system-on-chip module by the hub module, that is, the hub in the hub module is made to work, so that the system-on-chip module of the first main control unit may output the first data signal according to the network communication signal, meanwhile, the network communication signal can be transmitted to the second main control unit through the second interface, so that the second main control unit can output a second data signal based on the network communication signal, and the multi-input function of the display terminal is realized; and when the communication demand signal of the first main control unit cannot be monitored, the first main control unit can be determined to have no communication demand, and the switch module of the first main control unit can be controlled to be in a non-target working state, so that the received network communication signal can be directly transmitted to the second interface through the switch module, the network communication signal can be transmitted to the second main control unit through the second interface, the network communication signal received by the first main control unit can be received by the second main control unit, and the Bypass function of the first main control unit is realized.
Therefore, according to the embodiment of the application, independent cascading of each main control unit in the multi-input display terminal can be achieved through the first interface, the second interface and the switch module in the first main control unit, different connection topologies can be formed by switching different states of the switch module, the problem that an existing cascading scheme depends on an external concentrator or an internal structure to adopt a master-slave structure is solved, and the robustness of a system is improved.
Optionally, the embodiment of the present application provides a display terminal. The display terminal in the embodiment of the application comprises: the embodiment of the invention provides a cascade system of any one of the display terminals. Because the principle of the display terminal for solving the problem is similar to that of the cascade system of the display terminal, the implementation of the cascade system in the display terminal can refer to the implementation of the cascade system in the foregoing example, and repeated details are not repeated.
Of course, the display terminal in this embodiment of the present application, as a multi-input display terminal, may include the units and modules in the cascade system shown in the above examples, and may further include other functional modules, such as a power module, and the like, which is not limited in this embodiment of the present application. The power module may be responsible for providing a power supply, for example, providing power signals to each main control unit (including the first main control unit and the second main control unit), the video processor, the display screen, and the like in the cascade system, so as to supply power to each main control unit, the video processor, and the display screen, so that each main control unit, the video processor, and the display screen can work normally.
In a specific implementation, the display terminal may be a display, a display screen, a notebook computer, a navigator, an all-in-one machine, and the like, which is not specifically limited in this application.
In summary, the display terminal in the embodiment of the present application adopts a main control unit internal cascade multi-path control method, that is, different channels are set based on the first interface and the second interface in the first main control unit, the first switch and the second switch in the switch module, and the hub module, so that the cascade under different states is still effective, thereby effectively avoiding the situation that the cascade is unsuccessful when any main control unit fails due to the adoption of a linear cascade mode in the conventional multi-input display terminal, that is, solving the problem of poor robustness of the conventional multi-input display terminal cascade scheme, and improving the stability and usability of the cascade of the multi-input display terminal.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. A cascade system of display terminals, comprising: a first main control unit and a second main control unit;
the first main control unit comprises a first interface, a second interface, a switch module, a hub module and a system-on-chip module;
the first interface is used for receiving network communication signals;
the switch module is used for transmitting the network communication signal to the hub module in the target working state and transmitting the network communication signal to the second interface in the non-target working state;
the hub module is used for transmitting the network communication signal to the second interface and the system-on-chip module;
the system-on-chip module is used for outputting a first data signal according to the network communication signal;
the second interface is used for transmitting the network communication signal to the second main control unit;
the second master control unit is configured to output a second data signal based on the network communication signal.
2. The cascading system of display terminals of claim 1, wherein the first master control unit further comprises a logic control module;
the logic control module is used for providing a control signal to the control end of the switch module under the control of the power supply signal end;
the control signal is divided into a first control signal and a second control signal, the first control signal is used for controlling the switch module to be in a target working state, and the second control signal is used for controlling the switch module to be in a non-target working state.
3. The cascade system of claim 2, wherein the logic control module comprises a first resistor, a second resistor, a third resistor, and a first transistor;
the first pole of the first transistor is connected with the power supply signal end, the second pole of the first transistor is connected with the first end of the first resistor and the first end of the second resistor, the third pole of the first transistor is connected with the control end of the switch module and the first end of the third resistor, and the second end of the third resistor is connected with the reference ground.
4. The cascading system of display terminals of claim 1, wherein the switch module comprises a first switch and a second switch;
a common end of the first switch is connected with the first interface, a first end of the first switch is connected with a first port of the concentrator module, and a second end of the first switch is connected with a second end of the second switch;
the common end of the second switch is connected with the second interface, and the first end of the second switch is connected with the second port of the concentrator module;
and the third port of the hub module is connected with the system-on-chip module.
5. The cascade system of display terminals of claim 1, wherein the system-on-chip module is further configured to detect that the switch module is controlled to be in the target operating state when a communication demand signal is received.
6. The cascade system of display terminals of claim 4, wherein the first switch and the second switch are both single-pole double-throw switches.
7. The cascade system of display terminals according to any one of claims 1 to 6, further comprising: a signal processor and a display screen;
the signal processor is used for outputting a corresponding display signal to the display screen according to the received audio and video signal, wherein the audio and video signal comprises the first data signal and/or the second data signal;
the display screen is used for displaying according to the display signal.
8. The cascading system of display terminals of claim 7, wherein the second master control unit comprises a third interface and a target system-on-chip module;
the third interface is configured to receive the network communication signal and provide the network communication signal to the target system-on-chip module;
the target system-on-chip module is configured to output the second data signal to the signal processor according to the network communication signal.
9. A control method for a display terminal, for controlling the cascade system according to any one of claims 1 to 8, comprising:
monitoring a communication demand signal of a first main control unit after the first main control unit is powered on;
if the communication demand signal is monitored, controlling a switch module in the first main control unit to be in a target working state;
if the communication demand signal cannot be monitored, controlling a switch module in the first main control unit to be in a non-target working state;
the switch module is used for transmitting a network communication signal to the hub module of the first main control unit in the target working state and transmitting the interface to the second interface of the first main control unit in the non-working state;
the network communication signal is a signal received by the first main control unit through a first interface, the hub module is used for transmitting the network communication signal to the second interface and a system-on-chip module of the first main control unit, the system-on-chip module is used for outputting a first data signal corresponding to the first main control unit according to the network communication signal, the second interface is used for transmitting the network communication signal to a second main control unit of the display terminal, and the second main control unit is used for outputting a corresponding second data signal based on the network communication signal.
10. A display terminal, comprising: a cascade system of display terminals as claimed in any one of claims 1 to 8.
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