CN111754926B - LED video control system, fault positioning method thereof and LED display system - Google Patents
LED video control system, fault positioning method thereof and LED display system Download PDFInfo
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- CN111754926B CN111754926B CN202010741590.9A CN202010741590A CN111754926B CN 111754926 B CN111754926 B CN 111754926B CN 202010741590 A CN202010741590 A CN 202010741590A CN 111754926 B CN111754926 B CN 111754926B
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- 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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Abstract
The invention relates to an LED video control system, a fault positioning method thereof and an LED display system, wherein the control system comprises a video controller unit and a plurality of receiving cards, each receiving card corresponds to one LED display unit, and the video controller unit comprises a main output port and a standby output port; the receiving cards are connected in series to form a receiving card series circuit, and the head end and the tail end of the receiving card series circuit are respectively connected with the main output port and the standby output port; a main video transmission path and a standby video transmission path with opposite transmission directions exist in a receiving card serial line. When a certain signal port of the receiving card does not receive corresponding video data, the receiving card generates a fault signal comprising the identification of the receiving card, and the video controller unit determines the fault position according to the fault signal. According to the scheme, backup of video data can be achieved, the fault position can be located, follow-up maintenance operation is facilitated, and efficiency is improved.
Description
Technical Field
The invention relates to the field of LED display screens, in particular to an LED video control system and a method for positioning communication faults between LED boxes.
Background
With the increasing popularization of the LED display screen, the application field of the LED display screen is more and more, and especially in scenes such as conferences and performances, the requirement of users on the stability of the LED display screen is higher and higher. Among them, the most critical is the stability of the control link and the data link.
In the prior art, in order to ensure stable operation of the LED display screen, a common method is to backup a video displayed by the LED display screen. For example, the chinese patent application CN201710245159.3 discloses a backup scheme for inputting video source at the controller end, which adopts two identical video input sources to input into the controller.
Chinese utility model patent CN200620145330.0 discloses a LED video control system, video controller sets up two output ports A, B, every display element's receiving card has two signal port a, B, the signal port a of adjacent receiving card, B concatenates each other, the signal port a or the signal port B that are in two terminal receiving cards are connected with video controller's output port a or B respectively, thereby form the loop, video data can be in the loop forward transmission, also can reverse transmission, thereby the hot backup of video data has been realized.
The Chinese patent application CN201010238460.X adopts two sets of independent data channels, and when one set of data channel fails, the other set of data channel can be switched in a hot mode.
The existing video backup scheme is essentially to output two paths of identical videos to an LED display screen, and although the purpose of video backup can be achieved, when communication between two boxes in the LED display screen fails, the existing video backup scheme cannot judge which communication connection between the two boxes fails, and cannot locate the fault position. During maintenance, fault positions need to be manually checked, and the efficiency is low.
Disclosure of Invention
Therefore, the LED video control system and the method for positioning the communication fault between the LED boxes need to be provided aiming at the problems that the existing video backup scheme of the LED display screen cannot position the position of the communication fault in the LED display screen, needs to manually troubleshoot the fault position and is low in efficiency.
An embodiment of the present application provides an LED video control system, which is used for controlling an LED display screen formed by splicing a plurality of LED display units, and includes: the system comprises a video controller unit and a plurality of receiving cards, wherein each receiving card corresponds to one LED display unit;
The video controller unit receives video data input from outside, and is provided with at least one pair of output ends, each pair of output ends comprises a main output port and a standby output port, and the main video data and the standby video data which are the same in two paths are respectively output;
the receiving cards comprise a first signal port, a second signal port and a data control module, and the receiving cards are connected in series through the first signal port and the second signal port to form a receiving card series circuit;
the data control module controls the transmission of video data between the first signal port and the second signal port of the receiving card;
the receiving card serial line is provided with a starting end and a tail end, a first signal port of the receiving card at the starting end is connected with a main output port of the pair of output ends, and a second signal port of the receiving card at the tail end is connected with a standby output port of the pair of output ends;
the main video data output by the main output port is transmitted along the direction from the starting end to the tail end in the receiving card serial line to form a main video transmission path, and returns to the video controller unit through the spare output port;
the standby video data output by the standby output port is transmitted along the direction from the tail end to the starting end in the receiving card serial line to form a standby video transmission path and returns to the video controller unit through the main output port;
The receiving card selects the received main video data or the received standby video data from the first signal port and the second signal port according to a preset rule, and outputs the main video data or the standby video data to the corresponding LED display unit for displaying;
when the first signal port of a certain receiving card does not receive the main video data, the receiving card selects the standby video data received by the second signal port and transmits the standby video data to the corresponding LED display unit for display; the receiving card generates a fault signal, and transmits the fault signal to the video controller unit through the main video transmission channel and the standby output port by the second signal port; the fault signal comprises an identification of the receiving card;
when the second signal port of a certain receiving card does not receive the standby video data, the receiving card selects the main video data received by the first signal port and transmits the main video data to the corresponding LED display unit for displaying; the receiving card generates a fault signal, and transmits the fault signal to the video controller unit through the standby video transmission channel and the main output port by the first signal port;
and the video controller unit receives the fault signal and determines the fault position by combining the connection data of the serial line of the receiving card.
In some embodiments, the receiving card further includes a status control module for monitoring the connection status of the first signal port and the second signal port, and when it is monitored that one of the first signal port and the second signal port is in a disconnected status, generating a fault signal and sending the fault signal to the outside through the other signal port.
In some embodiments, the video controller unit includes two video controllers, wherein the output port of one video controller is configured as a main output port and the output port of the other video controller is configured as a standby output port.
In some embodiments, the video controller includes a video acquisition module, a port output interception module, an output port, and a control module, and the video acquisition module acquires input video data; the port output intercepting module intercepts video data loaded by an output port from the collected video data, and selects the corresponding output port to output outwards according to the control of the control module; the output port is also used for receiving video data input from the outside and fault signals; and the control module determines the fault position according to the received fault signal.
In some embodiments, the video controller further includes a network port status monitoring module, configured to monitor a connection status of the output port, and when it is monitored that the output port is in a disconnection status, the control module determines that a fault location is located at the output port.
In some embodiments, the fault signal may also include a signal port through which the video data is not received by the receiving card.
Another embodiment of the present application provides a method for locating a fault of an LED video control system, which is applied to the LED video control system described in any one of the foregoing embodiments, and includes:
the video controller unit acquires connection data of a receiving card serial line, wherein the connection data of the receiving card serial line comprises an identification of the receiving card and a position of the receiving card serial line;
when the receiving card judges that a certain signal port does not receive the corresponding video data, the receiving card sends a fault signal to the outside through another signal port; wherein the fault signal comprises an identification of the receiving card;
the video controller unit receives all fault signals and determines fault positions by combining the connection data of the serial lines of the receiving cards.
In some embodiments, the fault signal further includes a signal port through which video data is not received by the receiving card.
In some embodiments, the step of receiving all fault signals by the video controller unit, and determining the fault location by combining the connection data of the serial line of the receiving card specifically includes:
the video controller unit receives the fault signals from the main output port and the standby output port, identifies the receiving cards corresponding to the two fault signals and marks the receiving cards as first fault receiving cards;
judging whether the two first fault receiving cards are adjacent or not by combining the connection data of the serial lines of the receiving cards;
when the two first fault receiving cards are adjacent, determining the position between the two first fault receiving cards as a fault position;
when two first fault receiving cards are judged to be not adjacent, determining that a first fault position exists at the first fault receiving card, and acquiring a fault signal transmitted by the receiving card on the other side of the first fault position;
identifying two corresponding receiving cards from the fault signals transmitted by the receiving card on the other side of the first fault position, wherein the two corresponding receiving cards are the second fault receiving card;
when two second fault receiving cards are adjacent or the same, determining a fault position according to the second fault receiving cards; and when the two second fault receiving cards are not adjacent, determining the fault position and continuously obtaining the receiving card on the other side, and continuously and iteratively identifying the fault receiving cards until the subsequently identified fault receiving cards are adjacent or identical.
Another embodiment of this application still provides a LED display system, including LED video control system, LED display screen and host computer, the host computer provides video data for LED video control system, LED video control system receives video data to export and show for the LED display element that corresponds, LED video control system be aforementioned any one embodiment LED video control system.
The LED video control system that this application embodiment provided, through setting up the receiving card circuit of establishing ties, can mutual transmission video data between 2 signal ports of receiving card, not only can realize video backup, can also be when communication line trouble appears, the receiving card of fault location both sides can feed back the fault signal who contains the sign of receiving card to the video controller unit is according to this location fault location, makes things convenient for the operation of follow-up maintenance, raises the efficiency.
Drawings
Fig. 1 is a schematic diagram of a frame structure of an LED display system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an LED video control system according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a receiving card in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of an LED video control system according to another embodiment of the present application;
FIG. 5 is a schematic diagram of an LED video control system according to an embodiment of the present application during normal operation;
FIG. 6 is a schematic diagram of an LED video control system according to an embodiment of the present application when a fault occurs;
FIG. 7 is a schematic diagram of an LED video control system according to an embodiment of the present application in which two fault locations occur;
FIG. 8 is a block diagram of a video controller according to an embodiment of the present application;
fig. 9 is a schematic flowchart of a fault location method according to an embodiment of the present application;
fig. 10 is a detailed flowchart of step S500 of the fault location method according to an embodiment of the present application.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1 to fig. 3, an embodiment of the present application discloses an LED video control system, configured to control an LED display screen 100 formed by splicing a plurality of LED display units 10, including a video controller unit 200 and a plurality of receiving cards 300, where each receiving card 300 is arranged corresponding to one LED display unit 10;
the video controller unit 200 is configured to receive externally input video data, and is provided with at least one pair of output ends, each pair of output ends includes a main output port a and a standby output port B, and the main output port a and the standby output port B in each pair of output ends respectively output two paths of same main video data and standby video data;
the receiving card 300 comprises a first signal port a, a second signal port b and a data control module 310, and the receiving cards 300 are connected in series through the first signal port a and the second signal port b to form a receiving card series circuit; among the two adjacent receiving cards 300, the second signal port b of one receiving card 300 is connected with the first signal port a of the other receiving card 300;
a data control module 310 for controlling the transmission of video data between the first signal port a and the second signal port b of the receiving card 300;
the receiving card serial line has a start end and a tail end, a first signal port a of the receiving card 300 at the start end is connected with a main output port A of a pair of output ends, and a second signal port B of the receiving card 300 at the tail end is connected with a standby output port B of the pair of output ends;
The main video data output from the main output port a is transmitted along the direction from the start end to the end in the serial line of the receiving cards to form a main video transmission path, the first signal port a of the receiving card 300 at the start end receives the main video data and outputs the main video data to the first signal port a of the next receiving card 300 through the second signal port B, and the second signal port B of the receiving card 300 at the end returns the main video data to the video controller unit 200 through the standby output port B;
the standby video data output from the standby output port B is transmitted along the direction from the tail end to the start end in the serial line of the receiving cards to form a standby video transmission path, the second signal port B of the receiving card 300 at the tail end receives the standby video data and outputs the standby video data to the second signal port B of the next receiving card 300 through the first signal port a, and the first signal port a of the receiving card 300 at the start end returns the standby video data to the video controller unit 200 through the main output port a;
the receiving card 300 selects the received main video data or the received standby video data from the first signal port a and the second signal port b according to a preset rule, and outputs the main video data or the standby video data to the corresponding LED display unit for displaying;
When the first signal port a of the receiving card 300 does not receive the main video data, the receiving card 300 selects the standby video data received by the second signal port b, and transmits the standby video data to the corresponding LED display unit for display; the receiving card 300 generates a fault signal, and transmits the fault signal to the video controller unit 200 through the main video transmission path and the standby output port B via the second signal port B; the fault signal includes the identification of the receiving card and the signal port through which the receiving card 300 does not receive the video data;
when the second signal port b of the receiving card 300 does not receive the standby video data, the receiving card 300 selects the main video data received by the first signal port a, and transmits the main video data to the corresponding LED display unit for displaying; the receiving card 300 generates a fault signal, and transmits the fault signal to the video controller unit 200 through the standby video transmission path and the main output port a via the first signal port a;
the video controller unit 200 receives the fault signal, and determines the fault position according to the identification of the receiving card and the connection data of the serial line of the receiving card.
As shown in fig. 2 and fig. 3, the LED video control system may include N receiving cards 300, which are divided into receiving card 1 and receiving card 2 …, where a first signal port a of the receiving card 1 is connected to the main output port a of the video controller unit, and a second signal port b thereof is connected to the first signal port a of the receiving card 2; the second signal port b of the receiving card 2 is connected with the first signal port a of the receiving card 3. Thus, all the receiving cards 300 are connected in series to form a receiving card series circuit. The receiving card 1 is a receiving card at the start end, the receiving card N is a receiving card at the tail end, and the second signal port B of the receiving card N is connected to the standby output port B of the video controller unit 200.
The video controller unit 200 receives two video inputs, i.e., a main video input and a standby video input, which are externally input, outputs main video data through a main output port a, and outputs standby video data through a standby output port B.
It is understood that the video controller unit 200 may receive only one video input, generate two video data internally, and distribute the two video data to the main output port a and the standby output port B for output.
In fig. 5, N takes a value of 4. For convenience of description, in the following description, a scheme is described by taking N as an example of 4.
By arranging the data control module 310 in the receiving card 300, the main video data received by the first signal port a can be transmitted to the second signal port b to be output; the standby video data received by the second signal port b can be transmitted to the first signal port a to be output. Thus, two opposite transmission directions may exist between the first signal port a and the second signal port b of the receiving card 300. Generally, the receiving card 300 selects the main video data received by the first signal port a, and transmits the main video data to the corresponding LED display unit for displaying; when the first signal port a does not receive the main video data, the standby video data received by the second signal port b can be selected to be displayed for the LED display unit.
Therefore, in the receiving card serial line, two video transmission paths with opposite transmission directions exist, namely a main video transmission path and a standby video transmission path.
Wherein, the transmission direction of the main video transmission path is the main output port A of the video controller unit 200, the receiving card 1, the receiving card 2, the receiving card 3, the receiving card 4, the standby output port B of the video controller unit 200; the transmission scheme of the standby video transmission path is that the standby output port B of the video controller unit 200, the receiving card 4, the receiving card 3, the receiving card 2, the receiving card 1, and the main output port A of the video controller unit 200.
Specifically, in the main video transmission path, the main video data is first output from the main output port a of the video controller unit 200 to the first signal port a of the receiving card 1, then transmitted to the second signal port b of the receiving card 1, and then transmitted to the first signal port a of the receiving card 2. In this way, the main video data is sequentially transferred until the second signal port B of the receiving card N returns to the standby output port B of the video controller unit 200.
The transmission path of the standby video data in the standby video transmission path may refer to the description of the main video transmission path, except that the transmission direction is opposite. Through setting up two video transmission access that transmission direction is opposite, when breaking down all the way, can in time use the video data of another road transmission, so, can realize the video backup, guarantee LED video control system's stability.
Meanwhile, in some cases, a communication line between two receiving cards 300 may be broken, causing simultaneous interruption of the main video transmission path and the standby video transmission path. For example, as shown in fig. 6, it is assumed that a failure occurs between the receiving card 1 and the receiving card 2, resulting in a complete interruption of the communication line therebetween. At this time, the second signal port b of the receiving card 1 cannot transmit the main video data to the first signal port a of the receiving card 2; the first signal port a of the receiving card 2 cannot transmit the standby video data to the second signal port b of the receiving card 1.
When the second signal port b of the receiving card 1 is judged not to receive the standby video data, the receiving card 1 still selects the main video data received by the first signal port a and provides the main video data for the LED display unit to display; meanwhile, the receiving card 1 generates a fault signal, which is sent out from the first signal port a, and the fault signal is transmitted to the main output port a through the standby video transmission path connected to the receiving card 1, so that the video controller unit 200 receives the fault signal. The fault signal contains the identification of the receiving card 1.
When the first signal port a of the receiving card 2 is judged not to receive the main video data, the receiving card 2 selects the standby video data received by the second signal port b and provides the standby video data for the LED display unit to display; meanwhile, the receiving card 2 will generate a fault signal, which is sent out through the second signal port B, and the fault signal is transmitted to the standby output port B through the main video transmission path behind the receiving card 2, so that the video controller unit 200 receives the fault signal. The fault signal contains the identification of the receiving card 2.
The video controller unit 200, based on the two received fault signals, especially the identification of the receiving card, and combining the connection data of the serial line of the receiving cards, can identify the position relationship of the corresponding receiving card 1 and receiving card 2 of the fault signal in the serial line of the receiving cards, i.e. the two are adjacent, thereby determining that the fault position is between the receiving card 1 and the receiving card 2.
In some embodiments, the fault signal may also include a signal port through which the video data is not received by the receiving card.
The LED video control system that this application embodiment provided, through setting up the receiving card circuit of establishing ties, can mutual transmission video data between 2 signal ports of receiving card, not only can realize video backup, can also be when communication line trouble appears, the receiving card of fault location both sides can feed back the fault signal who contains the sign of receiving card to the video controller unit is according to this location fault location, makes things convenient for the operation of follow-up maintenance, raises the efficiency.
In some embodiments, as shown in fig. 4, the video controller unit 200 includes two video controllers 210, wherein one video controller 210 is provided with a main output port a and the other video controller 210 is provided with a standby output port B.
It is to be understood that the video controller unit 200 may also be formed by only one video controller 200, the video controller 200 providing both the main output port a and the standby output port B.
As shown in fig. 8, the video controller 210 may include a video capture module 211, a port output intercept module 212, an output port 219, and a control module 215, where the video capture module 211 captures input video data; the port output intercepting module 212 intercepts video data loaded by the output port 219 from the collected video data, and selects the corresponding output port 219 to output outwards according to the control of the control module 215; an output port 219 for receiving externally input video data and a failure signal; the control module 215 determines the location of the fault based on the received fault signal.
When the output port 219 serves as the main output port a, the control module 215 may further add a main video data identifier to the video data output via the output port 219 to form main video data.
It is to be understood that when the output port 219 serves as the standby output port B, the control module 215 may further add a standby video data identifier to the video data output via the output port 219 to form standby video data.
Further, the video controller 210, as shown in fig. 3, may further include a port status monitoring module 216 for monitoring a connection status of the output port 219, and when it is monitored that the output port 219 is in a disconnected status, the control module 215 may determine that the fault location is located at the output port 219.
The data control module 310 controls transmission of video data between the first signal port a and the second signal port b of the receiving card 300. Therefore, the data control module 310 may be configured to determine whether the first signal port a and the second signal port b receive corresponding video data, and accordingly control generation and outward transmission of the failure signal.
In some embodiments, as shown in fig. 8, the receiving card 300 may further include a status control module 320, configured to monitor connection statuses of the first signal port a and the second signal port b, generate a fault signal when it is monitored that one of the first signal port a and the second signal port b is in a disconnected status, and send the fault signal to the outside through the other signal port.
An embodiment of the present application further provides an LED display system, as shown in fig. 1, including the LED video control system, the LED display screen 100, and the upper computer 900 of the foregoing embodiments, where the LED video control system includes a video controller unit 200 and a plurality of receiving cards 300, the LED display screen 100 is formed by splicing a plurality of LED display units 10, each receiving card 300 is arranged corresponding to one LED display unit, and the receiving cards 300 are connected in series and connected to the video controller unit 200;
The upper computer 900 provides video data to the video controller unit 200;
the video controller unit 200 outputs video data, and the receiving card 300 receives the video data and outputs the video data to a corresponding LED display unit for display.
The LED display system provided by this embodiment also has the beneficial effects brought by the LED video control system in the foregoing embodiment.
As shown in fig. 9, another embodiment of the present application discloses a method for locating a fault of an LED video control system, which is applicable to the LED video control system described in the foregoing embodiment, where receiving cards are connected in series to form a receiving card series line, and the head and tail ends of the receiving card series line are respectively connected to a main output port and a standby output port of a video controller unit, and the method for locating a fault includes:
s100, the video controller unit acquires connection data of a receiving card serial line, wherein the connection data of the receiving card serial line comprises an identification of the receiving card and a position of the receiving card serial line;
for convenience of description, in the following description, the LED video control system includes 4 receiving cards as an example, and the scheme is described. It is understood that the number N of receiving cards may be set to other values according to actual situations.
As described in the foregoing embodiment of the LED video control system, as shown in the figure, the receiving cards 1, 2, 3 and 4 are serially connected in front of and behind each other to form a receiving card serial line, wherein the first signal port a of the receiving card 1 at the beginning end is connected to the main output port a of the video controller unit, and the second signal port B of the receiving card 4 at the end is connected to the standby output port B of the video controller unit.
After a receiving card serial line is formed, the receiving card 1 positioned at the starting end can send the identification of the receiving card to the receiving card 2; the receiving card 2 receives the identification of the receiving card 1, then adds the identification of itself and the connection relation with the receiving card 1, and sends the identification to the receiving card 3. The connection data of the serial line of the receiving cards can be transmitted to the video controller unit in sequence. It is understood that the connection relationship between adjacent receiving cards may be embodied by a storage structure of the identifier of the receiving card, for example, the identifier of the receiving card may be stored as a data chain, and the front-back link relationship of the data chain represents the front-back connection relationship between the receiving cards.
It can be understood that the video controller unit may also send a signal for acquiring connection data of the serial line of the receiving card to the serial line of the receiving card, and trigger the receiving card to send respective identifiers and a front-back connection relationship. And the video controller unit summarizes the data to obtain the connection data of the serial line of the receiving cards.
Based on the connection data of the serial line of the receiving cards, the video controller unit can know the position of each receiving card in the serial line of the receiving cards.
S300, when the receiving card judges that a certain signal port does not receive corresponding video data, the receiving card sends a fault signal to the outside through another signal port; wherein the fault signal comprises an identification of the receiving card;
and S500, the video controller unit receives all fault signals and determines the fault position by combining the connection data of the serial line of the receiving card.
In the serial line of the receiving card, there are two video transmission paths with opposite transmission directions, namely a main video transmission path and a standby video transmission path, which are respectively used for transmitting main video data and standby video data.
When the LED video control system works normally, the two signal ports of the receiving card can receive different video data from the outside, namely the first signal port a receives main video data from the outside, and the second signal port b receives standby video data from the outside. When a communication line of the LED video control system has a fault, the receiving card at the fault position is close to the signal port at one side of the fault position, and corresponding video data cannot be received from the outside. Therefore, when the receiving card determines that one of the signal ports does not receive the corresponding video data, it can be considered that a fault exists on the external line connected to the signal port. The receiving card can send fault signals to the outside through the signal port on the other side. The fault signal includes an identification of the receiving card and a signal port that video data was not received.
As an example, a failure occurs between the receiving card 1 and the receiving card 2. The signal port on the side of the receiving card 1 close to the fault position is a second signal port b. At this time, the second signal port b of the receiving card 1 cannot receive the standby video data from the outside, that is, from the first signal port a of the receiving card 2. The receiving card 1 generates a fault signal comprising the identification of the receiving card 1 and the second signal port b. The fault signal generated by the receiving card 1 is transmitted to the outside through the first signal port a, and is transmitted to the video controller unit through the standby video transmission path and the main output port a.
Accordingly, the signal port of the receiving card 2 near the fault location is the first signal port a, which cannot receive the main video data from the outside, that is, cannot receive the main video data from the second signal port b of the receiving card 1. The receiving card 2 generates a fault signal comprising the identification of the receiving card 2 and the first signal port a. The fault signal of the receiving card 2 is transmitted to the outside through the second signal port B, and is transmitted to the video controller unit through the main video transmission path, i.e., the receiving card 3, the receiving card 4, and the standby output port B.
The video controller unit aggregates all the received fault signals, and as an example, as shown in the figure, the video controller unit receives the fault signal sent by the card 1 and receives the fault signal sent by the card 2. From the received fault signal, the identification of the receiving card 1 and the identification of the receiving card 2 can be extracted. By matching with the connection data of the serial line of the receiving cards, it can be determined that the positions of the receiving cards 1 and 2 in the serial line of the receiving cards are adjacent, and thus it can be determined that the fault position is between the receiving cards 1 and 2.
According to the fault positioning method provided by the embodiment of the application, the receiving cards are connected in series and are connected with different output ports of the video controller unit; when a certain signal port of the receiving card fails to receive the corresponding video data, the receiving card can send a fault signal containing the identification of the receiving card to the video controller unit; the video controller unit can determine the fault position between the corresponding receiving cards according to the identifiers of the receiving cards in the received at least two fault signals, so that the fault position is identified, maintenance personnel can maintain the fault position conveniently and directly, and the maintenance efficiency is improved.
In some embodiments, the fault signal includes an identification of the receiving card and a signal port on which video data was not received. In step S300, the situation that the signal port of the receiving card does not receive the corresponding video data includes that the signal port fails to receive the video data transmitted from the outside, and may also include that the signal port fails to receive the video data from another signal port. In the former case, as described earlier, it represents that the communication line between the receiving cards has failed. In the latter case, it represents that the communication line between the two signal ports inside the receiving card is faulty, which also causes the interruption of the main video transmission path and the standby video transmission path.
When it is judged that video transmission fails between the signal ports of the receiving card, the sending card can send out fault signals from the two signal ports, wherein the fault signals comprise the identification of the receiving card and the signal ports, namely the first signal port a and the second signal port b, which do not receive the video signals. After the video controller unit receives the fault signal, it can determine that the fault position is inside the receiving card, but not the communication line between the receiving cards.
In some embodiments, as shown in FIG. 7, there may be two or more fault locations. The fault signal includes an identification of the receiving card and a signal port that video data was not received. At this time, step S500, as shown in fig. 10, may specifically include:
s510, the video controller unit receives fault signals from the main output port and the standby output port, identifies receiving cards corresponding to the two fault signals and marks the receiving cards as first fault receiving cards;
s520, judging whether the two first fault receiving cards are adjacent or not by combining the connection data of the receiving card serial line;
s530, when the two first fault receiving cards are judged to be adjacent, determining the position between the two first fault receiving cards as a fault position;
s540, when the two first fault receiving cards are not adjacent, determining that a first fault position exists at the first fault receiving card, and acquiring a fault signal transmitted by the receiving card on the other side of the first fault position;
S550, identifying two corresponding receiving cards from the fault signal transmitted by the receiving card on the other side of the first fault position, wherein the two corresponding receiving cards are the second fault receiving card;
s560, when two second fault receiving cards are adjacent or same, determining the fault position according to the second fault receiving cards; when it is determined that the two second fault receiving cards are not adjacent, step S540 is executed to determine the fault location and the receiving card on the other side to continue to obtain, and continuously and iteratively identify the fault receiving card until the subsequently identified fault receiving cards are adjacent or identical.
For example, as shown in fig. 7, it is assumed that there is a failure location between receiving cards 1 and 2, and between receiving cards 2 and 3. The reception card 1 transmits a failure signal to the main output port a of the video controller unit through the first signal port a. The receiving card 3 sends a failure signal to the standby output port B of the video controller unit through its second signal port B via the main video transmission path. Therefore, in step S510, the identified first faulty receiving card includes the receiving card 1 and the receiving card 3.
By combining the connection data of the receiving card serial line, it can be determined that the receiving card 1 and the receiving card 3 are not adjacent, a first fault position exists on one side of the second port b of the receiving card 1, and a first fault position exists on one side of the first signal port a of the receiving card 3; and then obtaining a receiving card on the other side of the first fault position. In this example, the receiving cards on the other side of the two first failure positions are both receiving cards 2. Both the first signal port a and the second signal port b of the receiving card 2 fail to receive the corresponding video data, so the receiving card 2 sends a failure signal through the first signal port a and the second signal port b, respectively.
The two signal ports of the read receiving card 2 are in communication connection with the video controller unit, so that the video controller unit can read the fault signals sent out by the two signal ports of the receiving card 2. And then, recognizing that the two fault signals both correspond to the receiving card 2, namely that the two second fault receiving cards are both the receiving card 2. Thus, all the failure positions, that is, between the receiving cards 1 and 2 and between the receiving cards 2 and 3 can be determined.
It is understood that when there are multiple receiving cards between the receiving cards 1 and 3, if there are other fault locations between the middle receiving cards, the fault locations may be identified through steps S540, S550, and S560 or multiple iterations of these steps.
According to the fault positioning method provided by the embodiment of the application, the receiving cards are connected in series and are connected with different output ports of the video controller unit; when a certain signal port of the receiving card fails to receive the corresponding video data, the receiving card can send a fault signal containing the identification of the receiving card to the video controller unit; the video controller unit can determine the fault position between the corresponding receiving cards according to the identifiers of the receiving cards in the received at least two fault signals, so that the fault position is identified, maintenance personnel can maintain the fault position conveniently and directly, and the maintenance efficiency is improved.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the embodiments. Further, those of skill in the art will recognize that the embodiments described in this specification are presently preferred embodiments and that no particular act is required to implement the embodiments of the disclosure.
The system/computer device integrated components/modules/units, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
In the several embodiments provided in the present invention, it should be understood that the disclosed system and method may be implemented in other ways. For example, the system embodiments described above are merely illustrative, and for example, the division of the components is only one logical division, and other divisions may be realized in practice.
In addition, each functional module/component in each embodiment of the present invention may be integrated into the same processing module/component, or each module/component may exist alone physically, or two or more modules/components may be integrated into the same module/component. The integrated modules/components can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional modules/components.
It will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention are capable of being embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An LED video control system for controlling an LED display screen formed by splicing a plurality of LED display units, comprising: the system comprises a video controller unit and a plurality of receiving cards, wherein each receiving card corresponds to one LED display unit;
the video controller unit receives video data input from outside and is provided with at least one pair of output ends, each pair of output ends comprises a main output end and a standby output end and respectively outputs two paths of same main video data and standby video data;
the receiving cards comprise a first signal port, a second signal port and a data control module, and the receiving cards are connected in series through the first signal port and the second signal port to form a receiving card series circuit;
The data control module controls the transmission of video data between the first signal port and the second signal port of the receiving card;
the receiving card serial line is provided with a starting end and a tail end, a first signal port of the receiving card at the starting end is connected with a main output port in a pair of output ends, and a second signal port of the receiving card at the tail end is connected with a standby output port in the pair of output ends;
the main video data output by the main output port is transmitted along the direction from the starting end to the tail end in the serial circuit of the receiving card to form a main video transmission path, and returns to the video controller unit through the spare output port;
the standby video data output by the standby output port is transmitted along the direction from the tail end to the starting end in the receiving card serial line to form a standby video transmission path and returns to the video controller unit through the main output port;
the receiving card selects the received main video data or the received standby video data from the first signal port and the second signal port according to a preset rule, and outputs the main video data or the standby video data to the corresponding LED display unit for displaying;
when the first signal port of a certain receiving card does not receive the main video data, the receiving card selects the standby video data received by the second signal port and transmits the standby video data to the corresponding LED display unit for display; the receiving card generates a fault signal, and transmits the fault signal to the video controller unit through the second signal port, the main video transmission channel and the standby output port; the fault signal comprises an identifier of a receiving card and a signal port which does not receive video data;
When the second signal port of a certain receiving card does not receive the standby video data, the receiving card selects the main video data received by the first signal port and transmits the main video data to the corresponding LED display unit for displaying; the receiving card generates a fault signal, and transmits the fault signal to the video controller unit through the standby video transmission channel and the main output port by the first signal port;
the video controller unit receives the fault signals from the main output port and the standby output port, identifies the receiving cards corresponding to the two fault signals and marks the receiving cards as first fault receiving cards;
judging whether the two first fault receiving cards are adjacent or not by combining the connection data of the serial lines of the receiving cards;
when the two first fault receiving cards are adjacent, determining the position between the two first fault receiving cards as a fault position;
when two first fault receiving cards are judged to be not adjacent, determining that a first fault position exists at the first fault receiving card, and acquiring a fault signal transmitted by the receiving card on the other side of the first fault position;
identifying two corresponding receiving cards from the fault signals transmitted by the receiving card on the other side of the first fault position, wherein the two corresponding receiving cards are the second fault receiving card;
When two second fault receiving cards are adjacent or the two second fault receiving cards are the same, determining the fault position according to the second fault receiving cards; and when the two second fault receiving cards are not adjacent, determining the fault position and continuously obtaining the receiving card on the other side, and continuously and iteratively identifying the fault receiving cards until the subsequently identified fault receiving cards are adjacent or identical.
2. The LED video control system according to claim 1, wherein the receiving card further comprises a status control module for monitoring the connection status of the first signal port and the second signal port, and when one of the first signal port and the second signal port is monitored to be in a disconnected status, a fault signal is generated and sent out through the other signal port.
3. The LED video control system of claim 1, wherein said video controller unit comprises two video controllers, wherein an output port of one video controller is configured as a main output port and an output port of the other video controller is configured as a standby output port.
4. The LED video control system according to claim 3, wherein the video controller comprises a video acquisition module, a port output interception module, an output port, and a control module, wherein the video acquisition module acquires input video data; the port output intercepting module intercepts video data loaded by an output port from the collected video data, and selects the corresponding output port to output outwards according to the control of the control module; the output port is also used for receiving video data input from the outside and fault signals; and the control module determines the fault position according to the received fault signal.
5. The LED video control system according to claim 4, wherein the video controller further comprises a port status monitoring module for monitoring the connection status of the output port, and when the output port is monitored to be in a disconnection status, the control module determines that the fault location is located at the output port.
6. A LED video control system fault location method applied to the LED video control system of any one of claims 1 to 5, characterized by comprising the following steps:
the video controller unit acquires connection data of a receiving card serial line, wherein the connection data of the receiving card serial line comprises an identification of the receiving card and a position of the receiving card serial line;
when the receiving card judges that a certain signal port does not receive the corresponding video data, the receiving card sends a fault signal to the outside through another signal port; the fault signal comprises an identification of a receiving card and a signal port which does not receive video data;
the video controller unit receives the fault signals from the main output port and the standby output port, identifies the receiving cards corresponding to the two fault signals and marks the receiving cards as first fault receiving cards;
judging whether two first fault receiving cards are adjacent or not by combining the connection data of the serial lines of the receiving cards;
When the two first fault receiving cards are adjacent, determining the position between the two first fault receiving cards as a fault position;
when two first fault receiving cards are judged to be not adjacent, determining that a first fault position exists at the first fault receiving card, and acquiring a fault signal transmitted by the receiving card on the other side of the first fault position;
identifying two corresponding receiving cards from the fault signals transmitted by the receiving card on the other side of the first fault position, wherein the two corresponding receiving cards are the second fault receiving card;
when two second fault receiving cards are adjacent or the two second fault receiving cards are the same, determining the fault position according to the second fault receiving cards; and when the two second fault receiving cards are not adjacent, determining the fault position and continuously obtaining the receiving card on the other side, and continuously and iteratively identifying the fault receiving cards until the subsequently identified fault receiving cards are adjacent or identical.
7. An LED display system comprises an LED video control system, an LED display screen and an upper computer, wherein the upper computer provides video data for the LED video control system, the LED video control system receives the video data and outputs the video data to a corresponding LED display unit for display, and the LED video control system is the LED video control system according to any one of claims 1 to 5.
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| CN114697757B (en) * | 2020-12-31 | 2023-12-26 | 深圳市奥拓电子股份有限公司 | Method for transmitting high data rate video, LED display device and system thereof |
| CN112885294B (en) * | 2021-01-27 | 2023-04-07 | 深圳市帝麦德斯科技有限公司 | LED drive chip, drive circuit and display unit of dual signal source input |
| CN113194564A (en) * | 2021-05-28 | 2021-07-30 | 深圳合芯谷微电子有限公司 | Multistage series LED control method, device, equipment and storage medium |
| CN115426518B (en) * | 2022-08-09 | 2023-08-25 | 杭州海康威视数字技术股份有限公司 | Display control system, image display method and LED display control 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 |
| CN117373377B (en) * | 2023-12-06 | 2024-02-09 | 深圳市绿源半导体技术有限公司 | Signal transmission system and signal transmission control method thereof |
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| JP3739983B2 (en) * | 1999-12-28 | 2006-01-25 | 株式会社東芝 | Multi-screen display device |
| CN201048032Y (en) * | 2006-12-29 | 2008-04-16 | 深圳市奥拓电子有限公司 | LED video control system |
| CN101466188A (en) * | 2009-01-12 | 2009-06-24 | 北京巨数数字技术开发有限公司 | Control device, system and method for automatically reporting fault |
| CN101894521B (en) * | 2010-07-28 | 2012-03-21 | 中国科学院长春光学精密机械与物理研究所 | Dual computer hot-standby system of LED display screen |
| CN104977859B (en) * | 2014-04-04 | 2018-10-26 | 伊顿公司 | A kind of frequency converter parallel control system and its fault tolerant control method |
| CN104486211B (en) * | 2014-12-09 | 2017-12-26 | 深圳视爵光旭电子有限公司 | Data frame route device and LED display control programs |
| CN108227684A (en) * | 2018-04-11 | 2018-06-29 | 福建日顺欣电子科技有限公司 | LED display control system fault monitoring device |
| CN110784663A (en) * | 2019-10-25 | 2020-02-11 | 深圳市奥拓电子股份有限公司 | Wireless data transmission and control method and device, electronic equipment and storage medium |
| KR102095164B1 (en) * | 2019-10-31 | 2020-03-30 | 주식회사 애즈원 | Electronic display system with modified ethernet network for a plurality of display units |
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