CN115035839A - Display system based on dual-system hot backup and LED display screen applied by same - Google Patents
Display system based on dual-system hot backup and LED display screen applied by same Download PDFInfo
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- CN115035839A CN115035839A CN202110248489.4A CN202110248489A CN115035839A CN 115035839 A CN115035839 A CN 115035839A CN 202110248489 A CN202110248489 A CN 202110248489A CN 115035839 A CN115035839 A CN 115035839A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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Abstract
The invention provides a display system based on dual-system hot backup and an LED display screen applied by the same, comprising: the main display control unit is connected with the display unit; the main display control unit comprises a plurality of main node devices for signal transmission; the standby display control unit is connected with the display unit; the standby display control unit comprises a plurality of standby node devices for backup; the main display control unit and the standby display control unit are respectively used for transmitting main signals and standby signals to the display unit and then displaying the main signals and the standby signals; and when any main node equipment in the main display control unit fails, switching a signal transmission path to the standby display control unit. According to the technical scheme, hot backup is achieved from the input of the signal source to the content of the display screen, and therefore the situation that any node device or cable in the middle is in a problem can be automatically switched to the standby scheme, display of the display screen is not affected, and the effect of all things are achieved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display system based on dual-system hot backup and an LED display screen applied by the display system.
Background
The LED display screen is an electronic display screen formed by LED dot matrixes, the display content forms of the screen, such as characters, animations, pictures and videos, are changed in time by turning on and off the lamp beads, and the display control of the components is carried out through a modular structure. Mainly comprises a display module, a control system and a power supply system.
In recent years, due to the advantages of LED area ductility, high brightness, outdoor seamless large-scale integrated circuits, long service life, wider color gamut and the like, LED display screens are vigorously and rapidly developed, however, as the application of the LED display screens is more and more extensive, a plurality of government organization command centers, aerospace command centers, large-scale import expositions and the like are more and more used, the status of some LED display screen systems is quite important, when the LED display screens break down and display is abnormal, serious consequences can be generated, and even negative effects can be brought to national images.
The cause of the large-area serious failure of the LED display screen is probably from a control system of the LED display screen, and signal transmission cables among various devices in the control system are controlled. The requirements for the LEDs in these particularly important situations are becoming more and more strict, especially the requirements for transmission and normal playing of video signals are becoming higher and higher, in order to make the transmission of the LED signals more stable and the video playing more stable and normal, the way of hot backup is becoming more and more popular and more applied in order to enable the device to fail in any network line, any network port, any independent main control, any video controller, and the LED to play normally when any video source fails, which requires the hot backup necessary for the components of the LED display screen. The hidden trouble that any one video controller fails to fail is avoided, communication is not a problem, automatic switching is achieved, and the hidden trouble that any one video controller fails is achieved invisibly and invisibly.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a dual-system hot backup based display system and an LED display panel applied thereto, so as to solve the technical problem of poor hot backup of the display panel in the prior art.
To achieve the above and other related objects, a first aspect of the present invention provides a dual system hot standby based display system, comprising: the main display control unit is connected with the display unit; the main display control unit comprises a plurality of main node devices for signal transmission; the standby display control unit is connected with the display unit; the standby display control unit comprises a plurality of standby node devices for backup; the main display control unit and the standby display control unit are respectively used for transmitting main signals and standby signals to the display unit and then displaying the main signals and the standby signals; and when any one main node equipment in the main display control unit fails, switching a signal transmission path to the standby display control unit.
In some embodiments of the first aspect of the present invention, the display unit comprises a network switch and a display screen connected thereto; the main node equipment of the main display control unit comprises: the main splicing/video processing device comprises a main splicing/video processor, a main DVI switcher, a main duplicator, a main sending box and a main control device; the main splicing/video processor is connected with a main signal and is connected with the main DVI switcher; the main DVI switcher is connected with the main duplicator; the main duplicator is connected with the main sending box; the main sending box is connected with the network switcher; the standby node device of the standby display control unit comprises: the device comprises a standby splicing/video processor, a standby DVI switcher, a standby duplicator, a standby sending box and a standby control device; the standby splicing/video processor is connected with a standby signal and the standby DVI switcher; the standby DVI switcher is connected with the standby duplicator; the backup duplicator is connected with a backup sending box; the standby sending box is connected with the network switcher.
In some embodiments of the first aspect of the present invention, the master replicator is further connected to the standby sender boxes to send a master signal to both the master sender boxes and the standby sender boxes simultaneously; the backup duplicator is also connected with the main sending box to send a backup signal to the main sending box and the backup sending box simultaneously; when a main DVI switcher in the main display control unit detects a main signal fault, the signal transmission path is switched to the standby display control unit, and the standby duplicator transmits signals to the main sending box and the standby sending box simultaneously.
In some embodiments of the first aspect of the present invention, the main DVI switch and the standby DVI switch are both provided with a signal detection circuit for detecting whether the transmission signal is normal.
In some embodiments of the first aspect of the present invention, the signal detection circuit comprises a monostable multivibrator, the input of which is a pulse signal; when the input signal is normal, the pulse signal is continuously triggered, and the signal detection circuit outputs a high level; when the input signal is abnormal, the pulse signal can not be triggered continuously, and the signal detection circuit outputs low level.
In some embodiments of the first aspect of the present invention, the display unit comprises a group of receiving boxes consisting of two receiving boxes; the display screen comprises a plurality of control panels which are connected end to end; the receiver box group is connected with the control boards in a ring shape, so that when any one receiver box fails, all the control boards in the ring connection can receive signals from the other receiver box.
In some embodiments of the first aspect of the present invention, the network switch is provided with a receiving module for master/slave switching; the receiving module is provided with at least 4 net ports, wherein 2 net ports are connected with the display screen scanning board and form a ring network, and the other two net ports are respectively connected with the main sending box and the standby sending box.
In some embodiments of the first aspect of the present invention, the manner in which the receiving module performs active/standby switching includes: informing all sending boxes of whether the current selected signal is a main signal or a standby signal through a broadcast address, and adding the selected signal into a synchronous frame as a characteristic byte; after receiving a synchronous frame from a sending box, judging the corresponding relation between each network port and a main signal and a standby signal according to the characteristic bytes in the synchronous frame; the network port addressed in the forward direction is a main signal network port, and the network port addressed in the reverse direction is a standby signal network port.
In some embodiments of the first aspect of the present invention, the display system further comprises a dual power supply unit comprising a main power supply and a backup power supply; and the main power supply and the standby power supply power to the display screen box body.
In order to achieve the above and other related objects, a second aspect of the present invention provides an LED display panel, which includes an LED display panel body connected to the dual-system hot standby based display system.
As described above, the display system based on dual-system hot backup and the LED display screen applied thereto of the present invention have the following advantages: according to the technical scheme, hot backup is achieved from the input of the signal source to the content of the display screen, and therefore the situation that any node device or cable in the middle is in a problem can be automatically switched to the standby scheme, display of the display screen is not affected, and the effect of all things are achieved.
Drawings
Fig. 1 is a schematic structural diagram of an LED display screen system equipped with only one set of control system in the prior art.
Fig. 2 is a schematic structural diagram of a dual-system hot backup based display system according to an embodiment of the present invention.
Fig. 3A is a schematic structural diagram of a signal detection circuit according to an embodiment of the invention.
Fig. 3B is a schematic diagram of the sync separator separating the composite sync signal according to an embodiment of the invention.
Fig. 4A is a block diagram illustrating a conventional configuration and a conventional operation of a display screen according to an embodiment of the present invention.
Fig. 4B is a schematic block diagram of a display screen configuration according to an embodiment of the invention.
Fig. 4C is a schematic block diagram of a display screen configuration according to an embodiment of the invention.
Fig. 5A is a schematic structural diagram of a display screen system with a single power supply backup according to an embodiment of the invention.
Fig. 5B is a schematic structural diagram of a dual power supply circuit according to an embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present invention. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present invention. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present invention is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "above," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.
The existing LED products can only meet the requirements of common users, and can normally or only back up partial equipment or line use links, and can not be lost in a myriad of ways when meeting particularly important occasions and command centers. Specifically, the LED display screen mainly comprises four parts, namely an LED display module, an LED structural member, an electrical system and a control system. The LED module (panel) is arranged by an LED lamp tube array, a driving circuit is matched, the LED module array is arranged, a chassis control system is matched, a chassis power distribution system and a chassis structural member are matched to form an LED box body, an input video signal can be completely presented on a terminal LED display screen, the middle of the LED box body approximately passes through four large links, a signal source is input into a video processor and a screen controller to a display screen, the LED box body mainly relates to the control system, the video control processor, a screen source and in-process receiving cards, transmitting cards and receiving boxes transmit various links such as a box network cable network port power supply, no matter which link has a problem, the final display and play of the LED display screen can be influenced, particularly, the status of the LED display screen systems is quite important, and serious consequences can be generated when the LED display screen breaks down and is displayed abnormally.
For the sake of understanding, the LED display screen system equipped with only one set of control system in the prior art will be explained with reference to fig. 1. As can be seen from the figure, the display screen controller (sending box) receives the video signal, converts the video signal into a display signal, transmits the display signal to the receiving box, and finally performs display output through the LED display screen, and any device is damaged during signal transmission, which may cause interruption of the playing signal.
Therefore, the invention provides a dual-system hot backup scheme, all links from video source input to receiving conversion to display screen playing are backed up, and the intermediate link can be automatically switched to the standby scheme no matter which link has a problem, so that the invention can achieve the purpose of being safe. It should be understood that the dual-system hot backup means that the two sets of control systems synchronously operate at the same time, once the main system fails, the control systems automatically and rapidly switch to use the standby system, and the switching trace is basically invisible in the playing effect of the LED display screen. In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are further described in detail by the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Fig. 2 is a schematic structural diagram of a display system based on dual-system hot backup according to an embodiment of the present invention. The display system in this embodiment includes a main display control unit and a standby display control unit, and both the main display control unit and the standby display control unit are connected to the display unit. The main display control unit comprises a plurality of main node devices for signal transmission; the standby display control unit comprises a plurality of standby node devices for backup. The main display control unit and the standby display control unit are respectively used for transmitting main signals and standby signals to the display unit and then displaying the main signals and the standby signals; and when any one main node equipment in the main display control unit fails, switching a signal transmission path to the standby display control unit.
The main node equipment of the main display control unit at least comprises: a master stitching/video processor 201, a master DVI switch 202, a master replicator 203, a master distribution box 204, a master control device 205, a master switch 206. The main splicing/video processor 201 accesses a main signal and is connected with the main DVI switcher 202; the master DVI switch 202 is connected to the master replicator 203; the master replicator 203 is connected to the master distribution box 204; the main transmitting box 204 is connected to the network switch 213 in the display unit, and the network switch 213 transmits the signal to the display screen 214; the main control device 205 is connected to the main switch 206; the master switch 06 connects the master distribution box 204.
The standby node device of the standby display control unit at least comprises: a standby splicing/video processor 207, a standby DVI switch 208, a standby copier 209, a standby transmission box 210, a standby control device 211, and a standby switch 212. The standby splicing/video processor 207 accesses the standby signal and is connected with the standby DVI switcher 208; the standby DVI switcher 208 is connected with the standby duplicator 209; the backup duplicator 209 is connected with a backup sender box 210; the standby transmission box 210 is connected to the network switch 213. The standby control device 211 is connected to the standby switch 212; the standby switch 212 is connected to the standby routing box 210 and to the main switch 206.
It should be understood that the stitching/video processor includes a stitching processor and a video processor; the splicing processor divides a video signal into a plurality of display units, outputs the divided display unit signals to a plurality of display terminals, completes the splicing of a plurality of displays to form a complete image, has complete hardware processing process, does not need operations such as computers, software starting and the like, and is very simple and convenient. The video processor is usually an LED video processor, which is a video processor dedicated to LEDs and is used to convert image signals from the outside (e.g., blue-ray DVD, computer, high-definition playing box, etc.) into signals acceptable for the LED display screen.
Therefore, compared with the conventional display system, the invention carries out comprehensive hot backup from the signal source to the final display, can immediately backup any node equipment when a fault occurs, and does not influence the display effect of the display screen. Specifically, the display system is additionally provided with a display screen controller (a sending box), a control device (such as a computer) and a backup device of a splicing/video processor, and connecting cables among the display screen controller, the control device and the backup device, and a DVI duplicator, a DVI switcher and a switchboard are added to meet the requirement of hot backup switching of the signal of the playing computer.
The main and standby signals are respectively input into the main splicing/video processor 201 and the standby splicing/video processor 207, the main splicing/video processor 201 processes the signals and then transmits the processed signals to the main DVI switch 202, and the standby splicing/video processor 207 processes the signals and then transmits the processed signals to the standby DVI switch 208.
It should be noted that the replicators and the transmission boxes are connected in a cross-exchange manner, that is, the main replicator 203 is connected to the main transmission box 204 and the standby transmission box 210, respectively, and the standby replicator 209 is also connected to the main transmission box 204 and the standby transmission box 210. Each DVI switch is provided with a signal detection circuit (such as a monostable oscillator), when the signal detection circuit in the DVI switch detects a high level, it indicates that the signals of the main splicing/video processor 201 and the standby splicing/video processor 207 are normally transmitted, and when the signal detection circuit in the DVI switch does not detect the signals or detects a low level signal, it indicates that the signals of the main splicing/video processor 201 and the standby splicing/video processor 207 are not transmitted or are abnormally received.
It should be noted that the technical solution of the present invention is to design the cross-connection between the replicator and the sending box, so as to allow for hot backup when the node device behind the DVI switcher fails. For example, when a node device before the DVI switch fails, the node device can be detected by a signal detection module in the DVI switch, so that a signal is switched to the standby display control unit; if the standby sending box in the standby display control unit has a fault at the moment, the display screen still cannot display, so that the duplicator transmits signals to the main sending box and the standby sending box simultaneously, and the technical problem can be solved ingeniously.
Therefore, when the signal detection circuit in the main DVI switch 202 detects no signal or a low-level signal, the main control device 205 switches the transmission signal from the main line to the standby line and device, and transmits the signal to the standby copier 209. The backup replicator 209 sends the master/backup signals to the master transmission box 204 and the backup transmission box 210, the master transmission box 204 and the backup transmission box 210 send the signals to the network switch 113 through an optical fiber or a network cable, and the network switch 113 sends the received master/backup signals to the display screen 114 for display. By the backup scheme, normal play can be automatically and seamlessly switched no matter which equipment in the display system is in failure or which signal line is disconnected.
For ease of understanding, the DVI switch of the present embodiment will now be further described. DVI surely refers to the abbreviation of digital display interface, and the DVI switch refers to multichannel DVI input signal exports the DVI signal all the way, can realize selecting arbitrary 1 way DVI signal output in a plurality of input DVI signals, switches, repeats, processes and operation such as duplication to the image signal of transmission. However, the conventional DVI switch cannot determine whether an input signal source is present or not and on/off, cannot realize automatic seamless switching, and needs manual determination for assistance.
The DVI switch of this embodiment incorporates a signal detection circuit. If the signal detection circuit detects that the main circuit output is continuously high level, judging that the signal transmission is normal; and if the signal detection circuit detects that the main circuit output is continuously low level or does not detect the signal, judging that the signal transmission is abnormal. The structure of the signal detection circuit is shown in fig. 3A.
The signal detection circuit is mainly used for separating a composite synchronous signal by a synchronous separator, and as shown in fig. 3B, the signal pulses every 64 us. The composite signal of the synchronous separator triggers a monostable multivibrator, and the external resistance and capacitance are adjusted to enable the monostable multivibrator to output a signal with pulse larger than 64 us. When the video signal is input normally, because 64us of the pulse width of the video signal exists, the currently triggered pulse signal is not finished, and a new synchronous pulse signal is transmitted, the monostable multivibrator maintains high level output when the video signal is input normally. When the video signal is not input normally or has no signal, and the currently triggered pulse signal is over, the new synchronous pulse signal is not transmitted, so that the monostable multivibrator outputs low level.
Therefore, this embodiment adds the technical scheme of signal detection circuit in the DVI switch, and the detection monitoring software of cooperation computer just can judge whether main video signal breaks down, if judge that main signal breaks down, the computer can in time accurately make the judgement to send the switching instruction to the DVI switch, make the signal switch to spare circuit, guarantee the normal broadcast of equipment.
In some examples, the invention also performs backup on the display screen, considering that if a device and a cable at one end of the display screen break down, the display effect of the LED display screen is also affected. For ease of understanding, the conventional configuration and conventional operating principle of one end of the display screen in the prior art will now be described in detail as follows.
As shown in fig. 4A, a conventional configuration and a conventional operation principle block diagram of a display screen in the prior art are shown. And each module box body of the LED display screen is internally provided with a control board which is responsible for receiving the display signals transmitted from the receiving box, processing the display signals according to addresses and distributing the display signals to each display unit in the box body. The R port on the control board is responsible for receiving signals, and the T port is responsible for transmitting signals to the control board in the next adjacent box body. Generally, each output port on the receiving box is responsible for a row of module boxes on the LED display screen, which is a conventional cascading manner. Under this kind of connected mode, if certain control panel or connecting cable broke down, will arouse that all control panels behind the fault point can't obtain correct signal, the module box that corresponds the control just can't normally show.
As shown in fig. 4B, a schematic block diagram of another prior art display screen configuration is shown. The connection scheme provided by this example is called ring connection, and has the following updates and modifications compared to the configuration scheme in fig. 4A: first, the function of the R port and the T port is eliminated, and both ports can receive signals and transmit signals. Secondly, the receiving box is also correspondingly modified, every two ports on the receiving box are made into a group, and the same signals containing the display ranges of the two lines of modules are output simultaneously. Finally, a connection cable between the last two control boards is added on the connection of the control boards. Through the improvement, the failure of any one cable in the annular connection does not affect the display effect of the whole screen, because the control board behind the failure point can obtain signals from the other end. Even if the control panel breaks down, only influence the module box that trouble control panel itself belonged to, can not arouse chain reaction.
As shown in fig. 4C, a schematic block diagram of a display screen configuration in an embodiment of the present invention is shown. In order to enhance the backup effect of the control system, the receiving box is also backed up on the basis that one end of the display screen adopts annular connection. Two receiving boxes simultaneously receive remote signals from the control room end and output the same signals at the same port, and the two ports are annularly connected with the control boards in the corresponding areas. When one of the receiving boxes is in failure, all the control boards in the ring connection can obtain signals from the other receiving box, and the display effect is not influenced.
In some examples, the power supply is backed up in consideration of the problem that the single power supply backed-up display screen system cannot normally play pictures due to black screen when the power supply fails (the structure of the single power supply backed-up display screen system is shown in fig. 5A). Fig. 5B shows a schematic structural diagram of the dual power supply circuit used in this embodiment, where the dual power supply circuit includes a main power supply and a backup power supply, and both the main power supply and the backup power supply have power detection signals for detection by the control system, and are connected to the LED display screen box through a box power supply line, so as to ensure that when any box power fails, the display screen can implement backup seamless switching, and display no black screen and no flashing screen.
In some examples, the dual-system hot-standby based display system of the present invention also performs hot-standby on the network switch. The network switch is applied to switching between a wide area network and an internal local area network, and realizes complete physical isolation by utilizing separation of servers and lines of the internal network and the external network. The network switch technology mainly includes various firewalls, and the reason for this is that the networks are physically connected. Because the two-in-one transmission box video output node and the transmission box are combined together, the hot backup on the video input side cannot be carried out, and the system hot backup needs to be considered again.
The example uses a network port hot switching mode to realize hot backup, and the realization mode is as follows: the network switch is equipped with the receiving module that the activestandby switched, and this receiving module is equipped with 4 at least net gapes, and wherein 2 net gapes are connected the display screen and are scanned the board and constitute the looped netowrk, and 2 net gapes connect main delivery box and reserve delivery box respectively in addition. The network port connected with the scanning board of the display screen can send data to the network port connected with the main sending box and also can send data to the network port connected with the standby sending box.
Optionally, the net openings for connecting the display screen and the sending box are uniformly distributed on both sides. In addition, a plurality of receiving modules can be arranged according to actual needs. The receiving module is a single-side surface-mounted device, the connector and the label device are positioned on different sides, and heat conducting rubber can be used for conducting the surface temperature of the hot surface-mounted device to the shell for heat dissipation. The receiving module can be provided with a double-power input plug, and can be powered by two 12V power supplies. And a connector can be used for connecting an expansion board, and the expansion board can realize serial port connection with a PLC (programmable logic controller) and is used for detecting the conditions of brightness, temperature and the like.
The hot standby switching concept of the network switch in this example is as follows:
first, all the sending boxes are informed of whether the main signal or the standby signal is currently selected through the broadcast address, and the selection signal is added into the synchronous frame as a characteristic byte (the synchronous frame contains a 1-byte characteristic byte which is used for indicating whether the current sending frame is the main signal or the standby signal and can indicate whether the main signal or the standby signal is currently selected).
Secondly, after receiving the synchronous frame from the sending box, the network switch judges which network port is the main signal and which network port is the standby signal according to the characteristic byte in the synchronous frame, and then selects the corresponding signal to transmit according to the selection instruction. The network switch makes a decision each time it receives a synchronization frame and changes the selection policy accordingly. It should be understood that among the ports connected to the transmission box, the port addressed in the forward direction is the main signal, and the port addressed in the reverse direction is the standby signal. The network switch receives forward addressing frame only forwarded from the forward network interface, and receives reverse addressing frame only forwarded from the reverse network interface.
The invention also provides an LED display screen which comprises an LED display screen body, wherein the LED display screen body is connected with the display system based on the dual-system hot backup. Since the embodiment of the LED display screen in this embodiment is similar to that described above, it is not described again.
In summary, the invention provides a display system based on dual-system hot backup and an LED display screen applied by the display system, and the technical scheme of the invention realizes hot backup from signal source input to the whole content of the display screen, ensures that no matter which node device or cable in the middle has a problem, can automatically switch to a standby scheme, does not influence the display of the display screen, and achieves all things. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. A dual system hot standby based display system, comprising:
the main display control unit is connected with the display unit; the main display control unit comprises a plurality of main node devices for signal transmission;
the standby display control unit is connected with the display unit; the standby display control unit comprises a plurality of standby node devices for backup; the main display control unit and the standby display control unit are respectively used for transmitting main signals and standby signals to the display unit and then displaying the main signals and the standby signals; and when any one main node equipment in the main display control unit fails, switching a signal transmission path to the standby display control unit.
2. The dual system hot standby based display system of claim 1, wherein:
the display unit comprises a network switcher and a display screen connected with the network switcher;
the main node equipment of the main display control unit comprises: the main splicing/video processing device comprises a main splicing/video processor, a main DVI switcher, a main duplicator, a main sending box, a main exchanger and a main control device; the main splicing/video processor is connected with a main signal and is connected with the main DVI switcher; the main DVI switcher is connected with the main duplicator; the main duplicator is connected with the main sending box; the main sending box is connected with the network switcher; the main control equipment is connected with the main switch; the main switch is connected with the main sending box;
the standby node device of the standby display control unit comprises: a standby splicing/video processor, a standby DVI switcher, a standby duplicator, a standby sending box, a standby switchboard and a standby control device; the standby splicing/video processor is connected with a standby signal and the standby DVI switcher; the standby DVI switcher is connected with the standby duplicator; the backup duplicator is connected with a backup sending box; the standby sending box is connected with the network switcher; the standby control equipment is connected with the standby switch; the standby switch is connected with the standby sending box and the main switch.
3. The dual system hot standby based display system of claim 2, wherein the main replicator is further connected to the standby transmission box to transmit a main signal to both the main transmission box and the standby transmission box simultaneously; the backup duplicator is also connected with the main sending box to send a backup signal to the main sending box and the backup sending box simultaneously; when a main DVI switcher in the main display control unit detects a main signal fault, the signal transmission path is switched to the standby display control unit, and the standby duplicator transmits signals to the main sending box and the standby sending box simultaneously.
4. The dual-system hot-standby based display system of claim 2, wherein the main DVI switch and the standby DVI switch are each provided with a signal detection circuit for detecting whether a transmission signal is normal.
5. The dual system hot standby based display system of claim 4, wherein the signal detection circuit comprises a monostable multivibrator, the input of which is a pulse signal; when the input signal is normal, the pulse signal is continuously triggered, and the signal detection circuit outputs high level; when the input signal is abnormal, the pulse signal can not be triggered continuously, and the signal detection circuit outputs low level.
6. The dual-system hot standby based display system according to claim 2, wherein the display unit includes a set of two receiving boxes; the display screen comprises a plurality of control panels which are connected end to end; the receiver box group is connected with the control boards in a ring shape, so that when any one receiver box fails, all the control boards in the ring connection can receive signals from the other receiver box.
7. The dual-system hot standby based display system of claim 2, wherein the network switch is provided with a receiving module for master-slave switching; the receiving module is provided with a plurality of net mouths, wherein part of the net mouths are connected with the display screen scanning board and form a ring network, and other net mouths are respectively connected with the main sending box and the standby sending box.
8. The dual-system hot backup-based display system of claim 7, wherein the receiving module performs active/standby switching in a manner comprising:
informing all sending boxes of whether the current selection is the main signal or the standby signal through the broadcast address, and adding the selection signal into a synchronous frame as a characteristic byte;
after receiving a synchronous frame from a sending box, judging the corresponding relation between each network port and a main signal and a standby signal according to the characteristic bytes in the synchronous frame; the network port addressed in the forward direction is a main signal network port, and the network port addressed in the reverse direction is a standby signal network port.
9. The dual system hot standby based display system of claim 1, further comprising a dual power supply unit comprising a main power supply and a backup power supply; and the main power supply and the standby power supply power to the display screen box body.
10. An LED display screen, characterized by comprising an LED display screen body connected with the dual-system hot backup based display system of any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110248489.4A CN115035839A (en) | 2021-03-08 | 2021-03-08 | Display system based on dual-system hot backup and LED display screen applied by same |
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| CN202110248489.4A CN115035839A (en) | 2021-03-08 | 2021-03-08 | Display system based on dual-system hot backup and LED display screen applied by same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116156090A (en) * | 2023-04-21 | 2023-05-23 | 厦门视诚科技有限公司 | Display control module, expandable display device and video display splicing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116156090A (en) * | 2023-04-21 | 2023-05-23 | 厦门视诚科技有限公司 | Display control module, expandable display device and video display splicing system |
| CN116156090B (en) * | 2023-04-21 | 2023-06-27 | 厦门视诚科技有限公司 | Display control module, expandable display device and video display splicing system |
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