Communication device and display control system

Abstract

The present application is applicable to the field of display screen technology, and provides a communication device and a display control system, wherein the communication device includes a first processor, multiple communication interfaces, a multimedia data output interface and multiple protection circuits; the first processor is respectively connected to the multiple communication interfaces and the multimedia data output interface; each communication interface is correspondingly connected to a protection circuit; the multimedia data output interface is connected to the multimedia data input interface of the display control device through the multimedia data input interface, and the decoded multimedia data is transmitted to the display control device. It can connect a variety of peripheral devices compatible with the communication interface and improve the anti-interference, anti-static and lightning protection capabilities of the communication interface.

Description

Technical Field

[0001] The present application belongs to the technical field of display screens, and in particular relates to a communication device and a display control system. Background Art

[0002] Display screens are widely used in various occasions, and are also widely used in the field of traffic displays for road signs, speed limit signs, traffic guidance, vehicle-mounted roof displays, vehicle-mounted rear window displays, and other occasions.

[0003] In different application scenarios, it is necessary to match the corresponding display screen control system for targeted control. The current display screen control system has a single function. When applying different traffic scenarios, different display screen control systems need to be switched, which is costly and inefficient. Summary of the Invention

[0004] The purpose of this application is to provide a communication device and a display control system to solve the problem that the current display screen control system has a single function and needs to switch different display screen control systems when applied in different traffic scenarios, resulting in high cost and low work efficiency.

[0005] A first aspect of an embodiment of the present application provides a communication device, including a first processor, multiple communication interfaces, at least one multimedia data output interface, and multiple protection circuits;

[0006] The first processor is connected to the multiple communication interfaces and the at least one multimedia data output interface respectively, and each of the communication interfaces is connected to a corresponding protection circuit;

[0007] The first processor is configured to obtain the encoded multimedia data through any of the communication interfaces, decode the data, and output the data through any of the multimedia data output interfaces;

[0008] Each of the protection circuits is used to provide anti-static or lightning protection for the communication interface connected thereto.

[0009] In one embodiment, the multiple communication interfaces include a first CAN bus interface and a second CAN bus interface, the multiple protection circuits include a first discharge tube circuit, the first CAN bus interface includes a first CAN bus transceiver and at least one first CAN bus physical interface, and the second CAN bus interface includes a second CAN bus transceiver and at least one second CAN bus physical interface;

[0010] The data transmitting end and the data receiving end of the first CAN bus transceiver are respectively connected to the first CAN bus data transmitting end and the first CAN bus data receiving end of the first processor in a one-to-one correspondence, the high level end and the low level end of the first CAN bus transceiver are connected to the first discharge tube circuit and the at least one first CAN bus physical interface in sequence, and each first CAN bus physical interface is used to connect to a peripheral device;

[0011] The data transmitting end and the data receiving end of the second CAN bus transceiver are respectively connected to the second CAN bus data transmitting end and the second CAN bus data receiving end of the first processor in a one-to-one correspondence, and the high level end and the low level end of the second CAN bus transceiver are connected to the at least one second CAN bus physical interface, and each second CAN bus physical interface is used to connect a peripheral device.

[0012] In one embodiment, the first discharge tube circuit includes a first diode discharge tube, a second diode discharge tube and a first triode discharge tube;

[0013] The first electrode of the first diode discharge tube is connected to the high level end of the first CAN bus transceiver and the first electrode of the first transistor respectively;

[0014] The first electrode of the second diode discharge tube is connected to the low level end of the first CAN bus transceiver and the second electrode of the first transistor respectively;

[0015] The second electrode of the first diode discharge tube, the second electrode of the second diode discharge tube and the third electrode of the first transistor are grounded.

[0016] In one embodiment, the plurality of communication interfaces include at least one asynchronous serial port, the plurality of protection circuits include a second discharge tube circuit, and the asynchronous serial port includes an asynchronous serial port transceiver and an asynchronous serial port physical interface;

[0017] The data transmitting end and the data receiving end of the asynchronous serial port transceiver are respectively connected to the asynchronous serial port data transmitting end and the asynchronous serial port data receiving end of the first processor in a one-to-one correspondence. The high level end and the low level end of the asynchronous serial port are connected to the first discharge tube circuit and the asynchronous serial port physical interface in sequence. The asynchronous serial port physical interface is used to connect a peripheral device.

[0018] In one embodiment, the second discharge tube circuit includes a third diode discharge tube, a fourth diode discharge tube and a second triode discharge tube;

[0019] The first electrode of the third diode discharge tube is connected to the high level end of the asynchronous serial port transceiver and the first electrode of the second transistor respectively;

[0020] The first electrode of the fourth diode discharge tube is connected to the low level end of the asynchronous serial port transceiver and the second electrode of the second transistor respectively;

[0021] The second electrode of the third diode discharge tube, the second electrode of the fourth diode discharge tube, and the third electrode of the second triode are grounded.

[0022] In one embodiment, the plurality of communication interfaces include at least one USB interface, and the plurality of protection circuits include at least one first TVS tube circuit corresponding one-to-one to the at least one USB interface;

[0023] The data positive terminal and the data negative terminal of each USB interface are respectively connected to a USB data positive terminal and a USB data negative terminal of the first processor in a one-to-one correspondence, and are also connected to a corresponding first TVS tube circuit.

[0024] In one embodiment, each of the first TVS tube circuits includes a first TVS tube and a rectifier bridge consisting of four diodes;

[0025] In each first TVS tube circuit, the positive electrode of the first TVS tube and the DC negative end of the rectifier bridge are grounded, the negative electrode of the first TVS tube and the DC positive end of the rectifier bridge are connected to a power supply, and the AC positive end and the AC negative end of the rectifier bridge are respectively connected to the data negative end and the data positive end of the corresponding one of the USB interfaces in a one-to-one correspondence.

[0026] In one embodiment, the system further includes at least one analog-to-digital converter interface connected to the first processor and at least one overvoltage protection circuit connected to the at least one analog-to-digital converter interface in a one-to-one correspondence.

[0027] In one embodiment, each of the overvoltage protection circuits includes a second TVS diode and a capacitor;

[0028] In each of the overvoltage protection circuits, the positive electrode of the second TVS tube and the first end of the capacitor are grounded, and the negative electrode of the second TVS tube and the second end of the capacitor are connected to a corresponding one of the analog-to-digital converter interfaces.

[0029] A second aspect of the embodiments of the present application provides a display control system, including a display control device and the communication device according to the first aspect of the embodiments of the present application;

[0030] The display control device includes a second processor and a multimedia data input interface and a display drive signal output interface connected to the second processor;

[0031] The multimedia data input interface is connected to the multimedia data output interface;

[0032] The second processor is configured to obtain the decoded multimedia data through the multimedia data input interface, process the decoded multimedia data into a display driving signal, and then output the signal to at least one display screen through the display driving signal output interface.

[0033] The communication device provided in the first aspect of the embodiment of the present application enables the first processor to be connected to multiple communication interfaces, can connect a variety of peripheral devices compatible with the communication interfaces, expand the functions of the display screen, and can also obtain multimedia data through multiple communication methods to improve the flexibility of data acquisition; by connecting to the multimedia data output interface, the decoded multimedia data is transmitted to the second processor; by connecting a protection circuit to the communication interface, the anti-interference, anti-static and lightning protection capabilities of the communication interface can be improved, thereby ensuring the stable operation of the communication device.

[0034] The display control system provided in the second aspect of an embodiment of the present application includes a communication device and a display control device. The communication device can flexibly connect peripheral devices with different functions by setting multiple different types of communication interfaces; the display control device reads the multimedia data sent by the communication device and processes it into a display drive signal, and can use different display drive signal output interfaces to output to different models of display screens, thereby improving the flexibility of the display control system to cope with different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a schematic diagram of the first structure of the communication device provided in an embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the second structure of the communication device provided in an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the third structure of the communication device provided in an embodiment of the present application;

[0039] Figure 4 This is a fourth structural diagram of the communication device provided in an embodiment of the present application;

[0040] Figure 5 This is a fifth structural diagram of the communication device provided in an embodiment of the present application;

[0041] Figure 6This is a sixth structural diagram of the communication device provided in an embodiment of the present application;

[0042] Figure 7 This is a seventh structural diagram of the communication device provided in an embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of the eighth structure of the communication device provided in an embodiment of the present application;

[0044] Figure 9 This is a ninth structural diagram of a communication device provided in an embodiment of the present application;

[0045] Figure 10 This is a schematic diagram of the first structure of the display control device provided in an embodiment of the present application;

[0046] Figure 11 This is a schematic diagram of the second structure of the display control device provided in an embodiment of the present application;

[0047] Figure 12 This is a schematic diagram of the first structure of the display control system provided by the embodiment of the present application; DETAILED DESCRIPTION

[0048] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0049] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0050] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0051] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0052] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0053] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0054] The embodiments of the present application provide a communication device and a display control system, which are applied to an LED (Light Emitting Diode) display screen and can be executed when driving and controlling the LED display screen.

[0055] like Figure 1 As shown, the communication device 10 provided in the embodiment of the present application includes a first processor 11, multiple communication interfaces 12, a multimedia data output interface 13 and multiple protection circuits 14;

[0056] The first processor 11 is connected to a plurality of communication interfaces 12 and a multimedia data output interface 13, and each communication interface 12 is connected to a corresponding protection circuit 14;

[0057] The first processor 11 is configured to obtain encoded multimedia data through any communication interface 12, decode the data, and output the data through the multimedia data output interface 13;

[0058] Each protection circuit 14 is used to provide anti-static or lightning protection for the communication interface 12 connected thereto.

[0059] In the application, the first processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.; the first processor can also integrate peripheral devices such as memory, storage, control pins, network ports, etc.; specifically, it can be a system-on-chip (SOC), for example, a NUC972DF62Y chip, which integrates NAND (NAND flash memory) memory or eMMC (Embedded Multi Media Card) memory for storing multimedia data.

[0060] In applications, multimedia data specifically refers to data used for playback on a display screen, such as audio data, video data, image data, text data, and the like. When the display screen is a traffic display screen, the multimedia data specifically refers to data used for traffic instructions; when the display screen is an advertising screen, the multimedia data specifically refers to data used for advertising. Traffic display screens include, but are not limited to, display screens used for traffic instructions for vehicles such as cars, subways, airplanes, and ships, and may also be advertising screens or route indication screens located inside vehicles. Advertising screens include, but are not limited to, display screens located in vehicles, outdoor venues (e.g., roads, squares, open-air venues), and indoor locations.

[0061] In applications, the multimedia data output interface can be an LCD (Liquid Crystal Display) interface, an RGB (Red-Green-Blue, three-channel color mode) interface, an eDP (Enhanced Display Port) interface, a mipi (Mobile Industry Processor Interface, mobile industry processor interface) interface and an LVDS (Low-Voltage Differential Signaling, low voltage differential signal) interface. The embodiments of the present application do not impose any restrictions on the specific type of the multimedia data output interface.

[0062] like Figure 2As shown, in one embodiment, the multiple communication interfaces 12 in the communication device 10 specifically include a first CAN bus interface 121 and a second CAN bus interface 122, the multiple protection circuits 14 include a first discharge tube circuit 141, the first CAN bus interface 121 includes a first CAN bus transceiver U1 and at least one first CAN bus physical interface P1, and the second CAN bus interface 122 includes a second CAN bus transceiver U2 and at least one second CAN bus physical interface P2;

[0063] The data transmitting terminal TX2 and the data receiving terminal RX2 of the first CAN bus transceiver U1 are respectively connected to the first CAN bus data transmitting terminal TX1 and the first CAN bus data receiving terminal RX1 of the first processor in a one-to-one correspondence. The high level terminal CANH1 and the low level terminal CANL1 of the first CAN bus transceiver U1 are connected to the first discharge tube circuit 141 and at least one first CAN bus physical interface P1 in sequence. Each first CAN bus physical interface P1 is used to connect to a peripheral device.

[0064] The data transmitting end TX4 and the data receiving end RX4 of the second CAN bus transceiver U2 are respectively connected one-to-one with the second CAN bus data transmitting end TX3 and the second CAN bus data receiving end RX3 of the first processor, and the high level end CANH2 and the low level end CANL2 of the second CAN bus transceiver U2 are connected to at least one second CAN bus physical interface P2, and each second CAN bus physical interface P2 is used to connect a peripheral device.

[0065] In application, the first CAN bus interface and the second CAN bus interface are used to connect to a control system and receive control signals. The control signals may be used to select specific multimedia data to play or pause, so as to control the display screen.

[0066] In application, the first CAN bus interface or the second CAN bus interface can be composed of a CAN bus transceiver and its peripheral circuits. The CAN bus transceiver can select any device, circuit or chip that can realize its function according to actual needs, such as the SN65HVD230 CAN bus transceiver.

[0067] In application, the first CAN bus physical interface and the second CAN bus physical interface can be used to connect any peripheral device capable of driving and controlling a display screen, such as a computer or server of a traffic management department. The embodiments of this application do not impose any restrictions on the specific types of peripheral devices. The second CAN bus physical interface can be used together with the first CAN bus physical interface to connect to a peripheral device, thereby reducing the load rate of the first CAN bus physical interface and improving its load capacity.

[0068] like Figure 3 As shown, in one embodiment, the first discharge tube circuit 141 in the communication device 10 includes a first diode discharge tube D1, a second diode discharge tube D2 and a first triode discharge tube D3;

[0069] A first electrode of the first diode discharge tube D1 is connected to the high level terminal CANH1 of the first CAN bus transceiver U1 and a first electrode of the first transistor D3;

[0070] A first electrode of the second diode discharge tube D2 is connected to the low level terminal CANL1 of the first CAN bus transceiver U1 and a second electrode of the first transistor D3;

[0071] The second electrode of the first diode discharge tube D1 , the second electrode of the second diode discharge tube D2 , and the third electrode of the first triode D3 are grounded.

[0072] In one embodiment, the first discharge tube circuit further includes a first resistor R1, a second resistor R2 and a third resistor R3;

[0073] The first resistor R1 is connected between the first electrode of the first diode discharge tube D1 and the high level terminal CANH1 of the first CAN bus transceiver U1;

[0074] The second resistor R2 is connected between the first electrode of the second diode discharge tube D2 and the low level terminal CANL1 of the first CAN bus transceiver U1;

[0075] The third resistor R3 is connected between the high level terminal CANH1 and the low level terminal CANL1 of the first CAN bus transceiver U1 .

[0076] In use, when the first discharge tube circuit is impacted by transient surge energy, the first, second, and first triode discharge tubes absorb the energy and discharge it to ground, thereby providing lightning protection for the first CAN bus interface. The first and second discharge tubes can be any suitable diodes that meet their functions, such as the BS0060N-2C type. The first triode discharge tube can be any suitable triode discharge tube that meets its functions, such as the B3D090M-C type.

[0077] like Figure 4 As shown, in one embodiment, the multiple communication interfaces 12 in the communication device 10 include at least one asynchronous serial port 123, the multiple protection circuits 14 include a second discharge tube circuit 142, and the asynchronous serial port 123 includes an asynchronous serial port transceiver U3 and an asynchronous serial port physical interface P3, wherein: Figure 4 Only one asynchronous serial port 123 is schematically shown;

[0078] The data transmitting terminal TX6 and the data receiving terminal RX6 of the asynchronous serial port transceiver U3 are respectively connected to the asynchronous serial port data transmitting terminal TX5 and the asynchronous serial port data receiving terminal RX5 of the first processor in a one-to-one correspondence. The high level terminal CANH3 and the low level terminal CANL3 of the asynchronous serial port, the first discharge tube circuit 142 and the asynchronous serial port physical interface P3 are connected in sequence. The asynchronous serial port physical interface P3 is used to connect a peripheral device.

[0079] In application, the asynchronous serial port may include at least one asynchronous serial communication interface such as RS232 interface, TTL interface, RS422 interface and RS485 interface. The embodiment of the present application does not impose any restrictions on the specific number and type of asynchronous serial ports.

[0080] In application, the asynchronous serial port physical interface can be used to connect any peripheral device that is suitable for RS232 interface, TTL interface, RS422 interface and RS485 interface, specifically power amplifiers, routers, temperature sensors, cameras, remote controls and other peripheral devices. The embodiments of this application do not impose any restrictions on the specific number and type of peripheral devices connected to the asynchronous serial port physical interface.

[0081] like Figure 5 As shown, in one embodiment, the second discharge tube circuit 142 in the communication device 10 includes a third diode discharge tube D4, a fourth diode discharge tube D5 and a second triode discharge tube D6;

[0082] A first electrode of the third diode discharge tube D4 is connected to the high level terminal CANH3 of the asynchronous serial port transceiver U3 and a first electrode of the second transistor D6;

[0083] The first electrode of the fourth diode discharge tube D5 is connected to the low level terminal CANL3 of the asynchronous serial port transceiver U3 and the second electrode of the second transistor D6;

[0084] The second electrode of the third diode discharge tube D4, the second electrode of the fourth diode discharge tube D5, and the third electrode of the second triode D6 are grounded.

[0085] In one embodiment, the second discharge tube circuit 142 further includes a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6;

[0086] The fourth resistor R4 is connected between the first electrode of the third diode discharge tube and the high level end of the asynchronous serial port transceiver;

[0087] The fifth resistor R5 is connected between the first electrode of the fourth diode discharge tube and the low level end of the asynchronous serial port transceiver;

[0088] The sixth resistor R6 is connected between the high level terminal CANH3 and the low level terminal CANL3 of the asynchronous serial port transceiver. In application, the structure and function of the second discharge tube circuit are the same as those of the first discharge tube circuit, and will not be described in detail here.

[0089] like Figure 6 As shown, in one embodiment, the multiple communication interfaces 12 in the communication device 10 include at least one USB interface 124, and the multiple protection circuits 14 include at least one first TVS (Transient Voltage Suppressor) tube circuit 143 corresponding to the at least one USB interface 124, wherein: Figure 6 Only one USB interface 124 is schematically shown;

[0090] The data positive terminal DP2 and the data negative terminal DM2 of each USB interface 124 are respectively connected to a USB data positive terminal DP1 and a USB data negative terminal DM1 of the first processor in a one-to-one correspondence, and are also connected to a corresponding first TVS tube circuit 143 .

[0091] In application, the USB interface can be used to connect peripheral devices such as sound cards, U disks, wireless network cards, etc., so as to realize functions such as conversion of digital signals and sound waves, acquisition of external storage data, and establishment of wireless networks through the USB interface. The embodiments of this application do not impose any restrictions on the specific types of peripheral devices connected to the USB interface.

[0092] like Figure 7 As shown, in one embodiment, each first TVS tube circuit 143 in the communication device 10 includes a first TVS tube D7 and a rectifier bridge composed of four diodes D8 to D11;

[0093] In each first TVS tube circuit 143, the positive electrode of the first TVS tube D12 and the DC negative terminal of the rectifier bridge are grounded, the negative electrode of the first TVS tube D12 and the DC positive terminal of the rectifier bridge are connected to the power supply, and the AC positive terminal and AC negative terminal of the rectifier bridge are respectively connected to the data negative terminal DM2 and data positive terminal DP2 of the corresponding USB interface.

[0094] In application, the first TVS tube circuit is connected in parallel between the data positive terminal and the data negative terminal of the USB interface. When the voltage value between the data positive terminal and the data negative terminal of the USB interface is within the operating range, the first TVS tube circuit does not operate, wherein the first TVS tube is in the cut-off state; when the voltage value between the data positive terminal and the data negative terminal of the USB interface exceeds the operating range and exceeds the breakdown voltage of the first TVS tube, the first TVS tube circuit changes from a high-impedance state to a low-impedance state, introduces a transient voltage into the ground terminal, and controls the voltage between the data positive terminal and the data negative terminal to be within a safe range to protect the USB interface. When the voltage value between the data positive terminal and the data negative terminal of the USB interface returns to the operating voltage, the first TVS tube returns to the cut-off state to achieve electrostatic protection for the USB interface.

[0095] In application, the first TVS tube circuit can select any device, circuit or chip that can achieve its function according to actual needs, for example, an ESD05V14T-LC chip.

[0096] like Figure 8 As shown, in one embodiment, the communication device 10 further includes at least one analog-to-digital converter interface 15 connected to the first processor 11 and at least one overvoltage protection circuit 16 connected to the at least one analog-to-digital converter interface 15 in a one-to-one correspondence.

[0097] In an application, the analog-to-digital converter interface is used to connect the analog-to-digital converter, and the overvoltage protection circuit is connected in parallel with the analog-to-digital converter interface and the analog-to-digital converter.

[0098] like Figure 9 As shown, in one embodiment, the overvoltage protection circuit 16 in the communication device 10 includes a second TVS diode D13 and a capacitor C1;

[0099] In each overvoltage protection circuit 16 , the positive electrode of the second TVS tube D13 and the first end of the capacitor C1 are grounded, and the negative electrode of the second TVS tube D13 and the second end of the capacitor C1 are connected to a corresponding analog-to-digital converter interface 15 .

[0100] In application, when the voltage value of the analog-to-digital converter interface is within the operating range, the second TVS tube does not work, that is, it is in the cut-off state; when the voltage value of the analog-to-digital converter interface exceeds the operating range and exceeds the breakdown voltage of the second TVS tube, the second TVS tube changes from a high-impedance state to a low-impedance state, introduces the transient voltage into the ground terminal and controls the voltage of the analog-to-digital converter interface to be within a safe range to protect the analog-to-digital converter interface. When the voltage of the analog-to-digital converter interface returns to the operating voltage, the second TVS tube returns to the cut-off state to achieve overvoltage protection for the analog-to-digital converter interface.

[0101] In application, the second TVS tube circuit can select any device, circuit or chip that can realize its function according to actual needs. The embodiment of the present application does not impose any restriction on the specific type of the second TVS tube circuit.

[0102] The communication device provided in the embodiment of the present application is connected to multiple communication interfaces through a first processor, can be connected to a variety of peripheral devices compatible with the communication interfaces, expand the functions of the display screen, and can also obtain multimedia data through multiple communication methods to improve the flexibility of data acquisition; by connecting to the multimedia data output interface, the decoded multimedia data is transmitted to the second processor; by connecting a protection circuit to the communication interface, the anti-interference, anti-static and lightning protection capabilities of the communication interface can be improved, thereby ensuring the stable operation of the communication device.

[0103] like Figure 10 As shown, the embodiment of the present application further provides a display control device 20, comprising a second processor 21, a multimedia data input interface 22 connected to the second processor 21, and a display drive signal output interface 23;

[0104] The second processor 20 is configured to obtain the decoded multimedia data through the multimedia data input interface 22 , process the decoded multimedia data into a display driving signal, and then output the signal to at least one display screen through the display driving signal output interface 23 .

[0105] In an application, the second processor receives multimedia data sent by the first processor via the multimedia data input interface, compresses the multimedia data into display drive signals, and transmits the display drive signals to one or more display screens via the display drive signal interface. Specifically, a single display drive signal interface can be connected to a single display screen; another display drive signal interface can be connected to a single display screen, with the display screen transmitting the display drive signals in series via a receiving card; or multiple display drive signal interfaces can be used to implement the aforementioned display drive signal transmission methods, wherein the display drive signals also include control signals sent by the first processor. This enables the output and control of multimedia data on the display screen.

[0106] In applications, the second processor can store multimedia data via an external display memory.

[0107] In applications, the second processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), off-the-shelf programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. For example, the EP4CE10F17C8N chip.

[0108] In one embodiment, the display drive signal output interface 23 includes at least one gigabit network port;

[0109] In applications, the display drive signal output interface can be at least one Gigabit Ethernet port. Gigabit Ethernet ports provide fast and stable transmission of display drive signals. Multiple Gigabit Ethernet ports can be configured to simultaneously transmit multiple sets of display drive signals, or to provide a backup Gigabit Ethernet port in the event of a Gigabit Ethernet port failure to ensure reliable display drive signal output.

[0110] like Figure 11 As shown, in one embodiment, the display drive signal output interface 23 of the display control device 20 may further include at least one gigabit network port, an RS485 port, and an IO port. Specifically, it may be a combination of a first gigabit network port 231, a second gigabit network port 232, an RS485 port 233, and an IO interface board 234.

[0111] In application, the first gigabit network port 231 is used to connect a display screen that is suitable for transmission via a gigabit network port and transmit a display drive signal, and the second gigabit network port 232 is used as a backup interface for the first gigabit network port 231; specifically, when multiple display screens are connected, the first gigabit network port and the second gigabit network port can be connected to the first display screen and the last display screen in a sequence of multiple display screens, respectively. If the multiple connected display screens are working normally, the display drive signal is sent by the first gigabit network port; if one or more display screens among the multiple connected display screens fail, the first gigabit network port and the second gigabit network port both send display drive signals to ensure that the transmission of the display drive signal is not interrupted by the failed display screen, and the display screen through which the display drive signal flows can be controlled; the RS485 interface 233 is used to connect a display screen that is suitable for transmission via an RS485 interface and transmit a display drive signal; the IO interface board 234 is used to connect different types of video connection cables, specifically VGA (Video Graphics Array) cable, HDMI (High Definition Multimedia Interface) cable, DVI (Digital Visual Interface, digital video interface) cable, DP (DisplayPort, display interface) cable and other video connection cables are used to connect to the display and transmit display drive signals; the mode of the RS485 interface and IO interface board is the same as that of the Gigabit network port, so they will not be repeated here.

[0112] The display control device provided in the embodiment of the present application is connected to different display drive signal output interfaces through a second processor, and can be connected to display screens using different interfaces to achieve flexible output of display drive signals and can be applied in different traffic scenarios.

[0113] like Figure 12 As shown, an embodiment of the present application further provides a display control system 100 , comprising the above-mentioned communication device 10 and the above-mentioned display control device 20 .

[0114] In application, the communication device is connected to the display control device via the multimedia data output interface and the multimedia data input interface. The number of display control devices is determined according to the networking of the display control system.

[0115] The display control system provided in the embodiment of the present application includes a communication device and a display control device. The communication device can flexibly connect peripheral devices with different functions by setting multiple different types of communication interfaces; the display control device reads the multimedia data sent by the communication device and processes it into a display drive signal, and can use different display drive signal output interfaces to output to different models of display screens, thereby improving the flexibility of the display control system to cope with different application scenarios.

[0116] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A communication device, characterized in that: It includes a first processor, a plurality of communication interfaces, at least one multimedia data output interface and a plurality of protection circuits; The first processor is connected to the multiple communication interfaces and the at least one multimedia data output interface respectively, and each of the communication interfaces is connected to a corresponding protection circuit; The first processor is configured to obtain the encoded multimedia data through any of the communication interfaces, decode the data, and output the data through any of the multimedia data output interfaces; Each of the protection circuits is used to provide anti-static or lightning protection for the communication interface connected thereto; The multiple communication interfaces include a first CAN bus interface and a second CAN bus interface, at least one asynchronous serial port, and at least one USB interface. The corresponding multiple protection circuits include a first discharge tube circuit connected to the first CAN bus interface, a second discharge tube circuit connected to the at least one asynchronous serial port, and at least one first TVS tube circuit connected in a one-to-one correspondence with the at least one USB interface. The first discharge tube circuit includes a first diode discharge tube, a second diode discharge tube and a first triode discharge tube; The first electrode of the first diode discharge tube is connected to the high level end of the first CAN bus transceiver and the first electrode of the first triode discharge tube respectively; The first electrode of the second diode discharge tube is connected to the low level end of the first CAN bus transceiver and the second electrode of the first triode discharge tube respectively; The second electrode of the first diode discharge tube, the second electrode of the second diode discharge tube, and the third electrode of the first triode discharge tube are grounded; The first discharge tube circuit further includes a first resistor R1, a second resistor R2 and a third resistor R3; The first resistor R1 is connected between the first electrode of the first diode discharge tube and the high level end of the first CAN bus transceiver; The second resistor R2 is connected between the first electrode of the second diode discharge tube and the low level end of the first CAN bus transceiver; The third resistor R3 is connected between the high level terminal and the low level terminal CANL1 of the first CAN bus transceiver.

2. The communication device according to claim 1, wherein The first CAN bus interface includes a first CAN bus transceiver and at least one first CAN bus physical interface, and the second CAN bus interface includes a second CAN bus transceiver and at least one second CAN bus physical interface; The data transmitting end and the data receiving end of the first CAN bus transceiver are respectively connected to the first CAN bus data transmitting end and the first CAN bus data receiving end of the first processor in a one-to-one correspondence, the high level end and the low level end of the first CAN bus transceiver are connected to the first discharge tube circuit and the at least one first CAN bus physical interface in sequence, and each first CAN bus physical interface is used to connect to a peripheral device; The data transmitting end and the data receiving end of the second CAN bus transceiver are respectively connected to the second CAN bus data transmitting end and the second CAN bus data receiving end of the first processor in a one-to-one correspondence, and the high level end and the low level end of the second CAN bus transceiver are connected to the at least one second CAN bus physical interface, and each second CAN bus physical interface is used to connect a peripheral device.

3. The communication device according to claim 1, wherein The asynchronous serial port includes an asynchronous serial port transceiver and an asynchronous serial port physical interface; The data transmitting end and the data receiving end of the asynchronous serial port transceiver are respectively connected to the asynchronous serial port data transmitting end and the asynchronous serial port data receiving end of the first processor in a one-to-one correspondence. The high level end and the low level end of the asynchronous serial port are connected to the second discharge tube circuit and the asynchronous serial port physical interface in sequence. The asynchronous serial port physical interface is used to connect a peripheral device.

4. The communication device according to claim 3, wherein The second discharge tube circuit includes a third diode discharge tube, a fourth diode discharge tube and a second triode discharge tube; The first electrode of the third diode discharge tube is connected to the high level end of the asynchronous serial port transceiver and the first electrode of the second triode discharge tube respectively; The first electrode of the fourth diode discharge tube is connected to the low level end of the asynchronous serial port transceiver and the second electrode of the second triode discharge tube respectively; The second electrode of the third diode discharge tube, the second electrode of the fourth diode discharge tube, and the third electrode of the second triode discharge tube are grounded.

5. The communication device according to claim 1, wherein The data positive terminal and the data negative terminal of each USB interface are respectively connected to a USB data positive terminal and a USB data negative terminal of the first processor in a one-to-one correspondence, and are also connected to a corresponding first TVS tube circuit.

6. The communication device according to claim 5, wherein: Each of the first TVS tube circuits includes a first TVS tube and a rectifier bridge composed of four diodes; In each first TVS tube circuit, the positive electrode of the first TVS tube and the DC negative end of the rectifier bridge are grounded, the negative electrode of the first TVS tube and the DC positive end of the rectifier bridge are connected to a power supply, and the AC positive end and the AC negative end of the rectifier bridge are respectively connected to the data negative end and the data positive end of the corresponding one of the USB interfaces in a one-to-one correspondence.

7. The communication device according to any one of claims 1 to 6, wherein: It also includes at least one analog-to-digital converter interface connected to the first processor and at least one overvoltage protection circuit connected to the at least one analog-to-digital converter interface in a one-to-one correspondence.

8. The communication device according to claim 7, wherein: Each of the overvoltage protection circuits includes a second TVS tube and a capacitor; In each of the overvoltage protection circuits, the positive electrode of the second TVS tube and the first end of the capacitor are grounded, and the negative electrode of the second TVS tube and the second end of the capacitor are connected to a corresponding one of the analog-to-digital converter interfaces.

9. A display control system, characterized in that: comprising a display control device and a communication device according to any one of claims 1 to 8; The display control device includes a second processor and a multimedia data input interface and a display drive signal output interface connected to the second processor; The multimedia data input interface is connected to the multimedia data output interface; The second processor is configured to obtain the decoded multimedia data through the multimedia data input interface, process the decoded multimedia data into a display driving signal, and then output the signal to at least one display screen through the display driving signal output interface.

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