CN115762396A - Display control method and device of spliced LED display screen - Google Patents
Display control method and device of spliced LED display screen Download PDFInfo
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Abstract
The invention relates to a display control method and a display control device of a spliced LED display screen, wherein the control method comprises the steps of providing the spliced LED display screen, when a system detects that a main transmission path in a row direction is completely communicated, video data are transmitted in the same row direction of the main transmission path in a straight row direction, when the system detects that a row open circuit signal in incomplete communication exists, the main transmission path in the row direction is modified to be zigzag, when the system detects that a row open circuit signal in incomplete communication exists and adjacent bypass transmission paths of a display box body before open circuit are all row open circuit signals, the main transmission path in the row direction is shortened, and meanwhile, the main transmission path in the row direction of the adjacent row also comprises a branch transmission path which is connected in series to the open circuit generation display box body and the row direction display box body connected behind the open circuit generation display box body. The invention is used for solving the problems that no video signal is sent to the serial transmission splicing type LED display screen to generate a display black area and the display mode of a fixed partition stops displaying when abnormal so as to manually remove and replace hardware in the prior art.
Description
Technical Field
The invention relates to the technical field of large display screens with the display size larger than the hardware size of a single LED display screen, in particular to a display control method and a display control device of a spliced LED display screen.
Background
In the technical field of large display screens, videos to be displayed are often larger than the hardware size of individual LED display screens, so as to generate the feeling of a large stage, a theater or a personal experience, for example, in exhibition halls, complex screens and backdrop screens, and the overall display size can reach thousands of screens or even tens of thousands of screens from hundreds of screens. When the spliced LED display screen is combined and partial area function loss or abnormity occurs during use, hardware replacement of the combined LED display screen has practical operation difficulty. In addition, when the connection of data transmission is detected, the display is required to be stopped, the examination is carried out one by one in a manual mode, and when the splicing number is more, the risk of displaying abnormal or local black areas is higher.
Referring to fig. 1, the tiled LED display screen in the prior art is formed by a plurality of LED display boxes 110 being tiled together and displaying in different areas. For example, in the conventional 1080P, four regions are divided, each connection region needs 4 pairs of network cables, a 2K screen needs 16 pairs of network cables, a 4K screen needs 64 pairs of network cables, and the display boxes 110 are connected in series through the serial transmission path 120 and externally connected with two or more G signal lines, so as to realize multi-screen cooperative display of a video with a large display size. . As shown in fig. 2, in each connection partition, the serial transmission path 120 is fixed in partition, each G signal line is to display several display boxes 110, and the display positions are all fixed in advance, so that when the transmission line is disconnected and the subsequent display box is not to display, a partially dark display black area appears. The serial modulation is that the transmission path of the G signal line input-connected at one end is broken, and the transmission path of the G signal line input-connected at the other end supplements the display video, however, the number of data packets that can be transmitted in the same time period of each serial transmission path 120 is limited, and the video data exceeding the allowable transmission number range will cause an overall delay or a problem of generating a display black area in the following display box. In fig. 2, the X point of the transmission path is a broken point, and the display box 110 having the X mark is a display black area where no video is output. In order to eliminate the display obstacle, it is necessary to stop the large-screen display function and then manually adjust and replace the hardware or/and perform the detection of the transmission path. When the number of splices is larger, the number of times of halt detection is more frequent.
The applicant discloses a box splicing optimization method of an LED display screen in the invention patent application No. CN108648688A, which comprises the following steps of A, issuing configuration information of a video source and a box to a sending card; B. after receiving the configuration information of the video source and the box body, the sending card packs the configuration information of the video source and the box body and forwards the configuration information to the receiving card; C. the receiving card is behind the configuration information of receiving video source and box, carries out the analysis with the configuration information of video source and box and generates the marginal data of video data and box, handles the marginal data of video data and box and produces the drive waveform and send for the LED display screen, can effectual optimization clearance between each module for can even transition between each module, the effectual display effect who improves the LED display screen, optimize speed piece simultaneously, optimize for the time weak point.
The applicant discloses a video processor and a video display control system in an invention patent application number CN109274901A, wherein the video processor comprises a video input module, a video processing module and a control module; the video input port is used for receiving a video source; the control module is used for receiving the synchronous signal, receiving the communication command and outputting the synchronous signal and the communication command, and the control module analyzes the communication command into a control command and sends the control command to the video processing module through the control command output port; the video processing module is used for processing a video source according to the control command, outputting video data through the video output port, driving and lightening a preset area in the screen according to the control command, and can connect a plurality of video processors in a multi-stage mode.
Disclosure of Invention
The invention mainly aims to provide a display control method of a spliced LED display screen, and mainly aims to solve the problem that a spliced large display screen is easy to generate a black display screen.
The invention also provides a display control device of the spliced LED display screen, which is used for realizing intelligent automatic adjustment of a transmission path of video display without manual adjustment and hardware replacement or shutdown line detection.
The main purpose of the invention is realized by the following technical scheme:
a display control method of a spliced LED display screen is provided, which comprises the following steps:
providing a spliced LED display screen which is formed by splicing a plurality of display boxes, wherein M multiplied by N arrays of the display boxes are spliced to form an array-type serial signal transmission network, wherein M is the number of columns, and N is the number of rows, and the signal transmission network comprises M column-direction main transmission paths formed by spliced columns corresponding to the display boxes and N row-direction bypass transmission paths formed by spliced rows corresponding to the display boxes;
when the system detects that the column-direction main transmission path is completely communicated, video data are transmitted in the same column direction based on the column-direction main transmission path so as to display a plurality of display boxes corresponding to the spliced column;
when the system detects that one of the column main transmission paths has an incompletely communicated column open circuit signal, intelligently modifying the column main transmission path into a zigzag shape, including an adjacent bypass transmission path of the display box body before the circuit is opened and an adjacent bypass transmission path of the display box body when the circuit is opened;
when the system detects that one of the column main transmission paths has an incompletely communicated column open circuit signal and the adjacent bypass transmission paths of the display box body before the circuit is opened are all column open circuit signals, the column main transmission path is intelligently shortened to the display box body before the circuit is opened, meanwhile, the column main transmission paths of the adjacent columns also comprise branch transmission paths, and the adjacent bypass transmission paths of the display box body with the circuit being opened are connected in series to the display box body with the circuit being opened and the column display box body connected behind the display box body with the circuit being opened.
By adopting the technical scheme, at least three sets of display modes with priority are established by utilizing the display control method and the spliced signal transmission network which is formed by connecting in series in an array manner, wherein the first priority display mode is a column-direction main transmission path which does not run to a bypass transmission path and has the shortest transmission path, when a display black area (namely a display box body which is not displayed exists in a certain column direction) appears in the normal display mode, a second priority display mode is intelligently started by detecting an incompletely communicated column open circuit signal, the column-direction main transmission path with the display black area is modified into a zigzag shape, the column-direction transmission path is modified into the zigzag shape, a display box body with a specific column is normally displayed in a zigzag manner by bypassing a break point of data transmission, when the display black area still exists in the second priority display mode, the column open circuit signal which is incompletely communicated and an adjacent bypass transmission path of the display box body before break are both used as row open circuit signals, the third priority display mode is intelligently started, the column-direction main transmission path is shortened to the display box body before break, and meanwhile, the column-direction main transmission path of the adjacent column and the column-direction main transmission path before break is also used for displaying in a branch in the normal display box body display mode. Therefore, the hardware does not need to be adjusted and replaced manually, and the line detection of shutdown is also not needed.
The invention may in a preferred example be further configured to: the system comprises a splicing type LED display screen, a display box body and a control card, wherein the splicing type LED display screen is provided with two main signal net ports and two auxiliary signal net ports, the system also comprises a main controller serving as a main controller, when the main controller and the display box body are communicated, the control card of the display box body acquires the width and height information of pixels of the display screen of the box body and transmits the information to the main controller, the main controller automatically generates a topological structure based on the acquired position information and the width and height information of the display screen of the box body, and the topological structure is used for transmitting corresponding display data to each display screen of the box body according to a box body address. Specifically, each display box is provided with four interfaces, namely, an upper interface, a lower interface, a left interface, a right interface, a main interface, a secondary interface, an auxiliary interface and a data transmission performance, wherein the four interfaces are arranged on the upper side and the lower side of each display box, the main interface is used as the main signal network port, the secondary interfaces are arranged on the left side and the right side of each display box and are used as the auxiliary signal network ports, and the data transmission performance of the main interface is higher than that of the secondary interfaces.
By adopting the above preferred technical characteristics, the control card is utilized to correspond to the two main signal net ports and the two auxiliary signal net ports of each display box body, after the box bodies are spliced, the main signal net ports establish connection from the row direction to the main transmission path, and the auxiliary signal net ports establish the row direction bypass transmission path. And by utilizing a topological structure automatically generated by the master controller, an arrangement rule of the box display screens can be established, and position information and width and height information corresponding to the actually assembled box display screens are given, so that each box display screen has an exclusive address corresponding to the width and height information.
The invention may further be configured in a preferred example to: the interface of the display box body is spliced by adopting a signal connection structure of a hard bolt, and the signal feedback condition of the display box body corresponding to the position of the signal line can be directly obtained according to the position of the bolt.
By adopting the preferable technical characteristics, the signal connection structure of the hard bolt is utilized to carry out the combination of 'splicing the display box body to form a transmission network', the connecting wires of the series matrix transmission network are saved after the large display screen is spliced, the connecting wires which are not exposed on the back of the display screen are omitted, the establishment of the series matrix transmission network is determined by the completion of the splicing operation, the labor and the time are saved, and the device integrity of the spliced large display screen on the back is realized.
The invention may in a preferred example be further configured to: the signal connection structure corresponding to each display box body and used for splicing the adjacent display box bodies comprises two bolt grooves and two bolts corresponding to each other.
By adopting the preferable technical characteristics, the latch grooves and the latches corresponding to each other in number and position are utilized, the latch grooves can be buckled with the latches of the adjacent display boxes on one side, and the latches can be buckled with the latch grooves of the adjacent display boxes on the other side, so that the display boxes are spliced in a direction corresponding relationship, the display boxes have the same orientation after being spliced, and the display boxes are prevented from being spliced in a 90-degree rotation mode without directionality or in a mode of upside down.
The invention may further be configured in a preferred example to: each display box body corresponds to an exclusive address code, a signal transmission controller is arranged in each display box body, and the signal communication condition of each display box body can be obtained through the address codes.
By adopting the preferable technical characteristics, the exclusive address code of the display box body is combined with the corresponding single data packet, and the signal transmission controller in the display box body returns the address code of the received corresponding single data packet as a communication detection signal, so that the signal communication condition of the display box body can be obtained through the address code. When the connection detection signal with the address code is not received within a specific time, the reverse derivation of the open circuit signal under different priority display modes can be performed.
The invention may in a preferred example be further configured to: the signal transmission controller adopts full duplex signals, so that the display box body can receive display signals and output feedback signals.
By adopting the preferable technical characteristics, the signal transmission controller of the full-duplex signal is utilized, the receiving of the display signal and the output of the feedback signal are in the same time period in the display box body, and the communication condition of the transmission path under the currently adopted display mode is quickly confirmed.
The invention may in a preferred example be further configured to: in the step of providing the spliced LED display screen, M shunts are connected corresponding to the starting ends of the M column-direction main transmission paths, and the shunts are connected to a master controller in series in the row direction.
By adopting the preferable technical characteristics, the M shunts are connected to the starting ends of the M column-direction main transmission paths and correspond to the column number of the display box body splicing array, and the total video data is intercepted and shunted into the video data of each column direction one by one.
The invention may further be configured in a preferred example to: the shunt foundation the address code acquires the reposition of redundant personnel data package, will when the address code does not accord with through transmission protocol the reposition of redundant personnel data package is based on the row of shunt is walked to next shunt to the series connection route, the reposition of redundant personnel data package still contains correspondingly the single data package of display box, the display box acquires corresponding single data package based on corresponding address code, will when the address code does not accord with through transmission protocol the single data package based on the row is walked to next display box to main transmission path.
By adopting the preferable technical characteristics, the split data packet split by the video data is used as the column-direction display video, the splitter intercepts and captures the video column by column in the row-direction series path of the splitter according to the address code, the split data packet comprises a single data packet corresponding to the display box body, and the single data packet is sent to the corresponding display box body based on the address code according to the adjustable column-direction main transmission path which can be transmitted in a straight line, can be bent, can be shortened or is branched, so that the problem of display errors caused by data packet loss or mistransmission is avoided.
The main purpose of the invention is realized by the following technical scheme:
the display control device of the spliced LED display screen is used for executing the display control method of the spliced LED display screen according to any one technical scheme, or/and comprises the following components:
the main controller is used for managing video data capable of displaying a spliced LED display screen, dividing the video data into a plurality of column-direction shunt data packets, wherein each column-direction shunt data packet comprises a plurality of single data packets which are spliced in the same column and correspond to the display box body;
a plurality of shunts arranged at one side of the spliced LED display screen, the shunts being connected in series to the master controller in the row direction, and
the spliced LED display screen comprises a plurality of spliced array display boxes, wherein the spliced array LED display screen is formed by splicing a plurality of arrays of the display boxes, namely, an array-type serially-connected signal transmission network is formed by splicing the arrays of the display boxes, and the signal transmission network comprises a column-direction main transmission path formed by spliced columns corresponding to the display boxes and a row-direction bypass transmission path formed by spliced rows corresponding to the display boxes.
By adopting the technical scheme, the signal transmission network in array series connection is formed by utilizing array splicing of the display box bodies, and comprises the column-direction main transmission path and the row-direction bypass transmission path, so that the display control device provides multiple adjustable priority display modes of the video transmission path, the formation of a display black area is avoided, and the manual detection and hardware replacement which are required to stop displaying in the prior art are eliminated.
The invention may further be configured in a preferred example to: based on the connection condition of the column-direction main transmission path, the data packet transmission path is selected from any one of directly utilizing the column-direction main transmission path, modifying the column-direction main transmission path into a zigzag shape, and shortening the column-direction main transmission path and matching with a branch transmission path of an adjacent column and increasing the column-direction main transmission path.
By adopting the above preferred technical features, at least three sets of priority display modes can be established by sequentially selecting the data packet transmission path from any one of the column main transmission path, the zigzag column main transmission path and the branch transmission path which shortens the column main transmission path and is additionally provided to the column main transmission path of the adjacent column, and the display box body connected to the column can be displayed by the row bypass transmission path under the condition that the column main transmission path has a disconnection point.
The invention may further be configured in a preferred example to: the input end and the output end of the series-connection shunt (40) are respectively connected with a network bus communicated with the master controller and an anti-series network bus.
By adopting the preferable technical characteristics, the reverse serial connection network bus can be utilized, when the network bus of the forward serial path is in fault or broken circuit, the reverse serial connection network bus can replace the forward network bus, and the data packet is still output to the shunt from the input end to the output end.
In summary, the present invention includes at least one of the following technical effects that contribute to the prior art:
1. in a specific use occasion, the transmission path of the video data can be intelligently adjusted, and the problems that no video signal is sent to the tandem type transmission spliced LED display screen to generate a display black area and the display mode of a fixed partition stops displaying when abnormal so as to manually remove and replace hardware in the prior art are solved;
2. the traditional fixed display subareas are replaced, a plurality of sets of priority display modes are adopted to enable the column-direction main transmission path to be dynamically adjustable, multi-path automatic intelligent subarea display can be realized in the large-screen display process based on the adjustment change of the priority selection order, and abnormal display or dark area generation can be automatically self-repaired in the use process of the display screen;
3. when the display boxes arranged in an array have different size changes in adjacent rows or adjacent columns, based on the size of the light box display screen, the master controller automatically calculates corresponding single data packets and gives exclusive address codes, and then establishes an alternative display mode with a transmission route capable of being adjusted in a winding manner by utilizing the signal transmission network connected in series in an array manner, even if the main line is in an open circuit, the display mode is intelligently selected and self-checked from short to long, and the full-size video display is not influenced.
Drawings
FIG. 1 is a schematic connection diagram of a display control device of a tiled LED display screen in the prior art;
FIG. 2 is a schematic diagram showing a failure occurring in one connection partition connection of a display control device of a tiled LED display screen in the prior art;
FIG. 3 is a flow chart illustrating a display control method for a tiled LED display screen according to some preferred embodiments of the present invention;
FIG. 4 is a schematic connection diagram illustrating the connection of the display control device of the tiled LED display screen provided in step S1 in FIG. 3 according to some preferred embodiments of the present invention;
FIG. 5 is a schematic diagram showing the connection between the general controller and the current divider in the display control apparatus of the tiled LED display panel according to some preferred embodiments of the present invention;
FIG. 6 is a schematic diagram illustrating the connection between the splitter and the display box in the display control apparatus of the tiled LED display according to some preferred embodiments of the present invention;
FIG. 7 is a schematic diagram of the video data transmission in the first priority display mode of step S3 in FIG. 3 according to some embodiments of the present invention;
FIG. 8 is a schematic diagram of video data transmission in the second priority display mode of step S4 of FIG. 3 according to some embodiments of the present invention;
FIG. 9 is a schematic diagram illustrating another exemplary video data transmission in the second priority display mode of step S4 in FIG. 3 according to some preferred embodiments of the present invention;
FIG. 10 is a schematic diagram illustrating video data transmission in the third preferred display mode of step S5 in FIG. 3 according to some preferred embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments for understanding the inventive concept of the present invention, and do not represent all embodiments, nor do they explain a unique embodiment. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention under the understanding of the inventive concept of the present invention are within the protection scope of the present invention.
The vertical direction in the drawings corresponds to the "column direction" of the embodiments, and the horizontal direction in the drawings corresponds to the "row direction" of the embodiments. It should be noted that, if the present invention relates to directional indications (such as up, down, left, right, front, back, 8230; \8230;), the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed. In order to more conveniently understand the technical solution of the present invention, the display control method and device of the tiled LED display screen of the present invention are further described and explained in detail below, but are not to be taken as the protection scope defined by the present invention.
As a part of the accompanying drawings of specific examples, fig. 3 shows a flow of a display control method of a tiled LED display screen; FIG. 4 is a schematic diagram illustrating a display control apparatus of the tiled LED display screen provided in step S1 of FIG. 3; fig. 5 shows the connection between the main controller and the splitter within the device, fig. 6 shows the connection between the splitter and the display box within the device, fig. 7 shows the video data transmission in the first priority display mode of step S3 of fig. 3, fig. 8 shows the video data transmission in the second priority display mode of step S4 of fig. 3, fig. 9 shows another example of the video data transmission in the second priority display mode of step S4 of fig. 3, and fig. 10 shows the video data transmission in the third priority display mode of step S5 of fig. 3. The drawings only show the common parts of the embodiments, and the parts with differences or differences are further described in text or presented in a manner of comparing with the drawings, for example, fig. 8 and 9 respectively show the different exemplary representations of the second preferred display mode of step S4 in fig. 3 under different open circuit conditions. Therefore, based on the industrial characteristics and technical essence, those skilled in the art should correctly and reasonably understand and judge whether the individual technical features or any combination of a plurality of the technical features described below can be characterized in the same embodiment or whether a plurality of technical features mutually exclusive can be respectively characterized in different variant embodiments. The numbers of the columns in the embodiments of fig. 4 and 7 to 10 are represented by a, B, C and D \8230inthe examples, M is a positive integer of 2 or more for the number of columns, and the numbers of the rows in the embodiments are represented by 0, 1, 2, 3 and 4 \8230inthe examples, where 0 is a configuration row of the shunt and N is a number of rows. The gaps between the boxes are shown in the drawings to facilitate understanding of schematic representation of the connection relationship, and actually show that the splicing between the boxes is as close as possible, and even presents seamless splicing under the visual angle of the distance between the viewers.
As a text part of a specific example, the "splicing" described in the embodiments indicates mechanical assembly of two adjacent display cabinets, so that multiple display screens of the cabinets are spliced into one display screen with a larger size. The "splicing or forming" described in the embodiments means that the mechanical assembly process of the splicing includes the formation of the signal transmission network connected in series in an array, and particularly, but not limited to, the mechanical splicing of the display cabinet and the formation of the row-direction and column-direction transmission networks are completed simultaneously.
Referring to the process steps in fig. 3 and the device connection relationship in fig. 4, the embodiment of the present invention discloses a display control method for a tiled LED display screen, including:
the method comprises the following steps that S1, a spliced LED display screen is provided and is formed by splicing a plurality of display boxes 10, M multiplied by N arrays of the display boxes 10 are spliced to form an array type serial signal transmission network, wherein M is the number of columns, N is the number of rows, the signal transmission network comprises M column main transmission paths 20 formed by the spliced columns corresponding to the display boxes 10 and N row bypass transmission paths 30 formed by the spliced rows corresponding to the display boxes 10, M is a positive integer larger than or equal to 2, N is a positive integer larger than 2, in the example, M and N are 4, in the example, a system specifically comprises a master controller 50 and has data processing capacity, such as division, correction, addressing and redefinition of video data, an algorithm with artificial intelligence and a data transmission rule are set in the built-in controller 50, in the switching and adjusting process of a priority display mode, the spliced LED display screen can still be used in the use process of video display, the master controller 50 and the display boxes 10 can acquire information of the display boxes 10 after communication is established, and the display screen can acquire display information corresponding to a display box 10 and transmit the display screen topology information to a display screen according to the display screen with the width and the display screen width;
in the example, three sets of priority display modes are based, wherein the first priority display mode corresponds to the step S3, the second priority display mode corresponds to the step S4, and the third priority display mode corresponds to the step S5;
step S3, referring to FIG. 7 for a specific example, when the system detects that the row-wise main transmission path 20 is completely communicated, video data is transmitted in the same row direction based on the row-wise main transmission path 20 to display a plurality of display boxes 10 corresponding to the spliced row;
step S4, referring to FIG. 8 or FIG. 9 as a specific example, when the system detects that one of the column-wise main transmission paths 20 has a column open circuit signal that is incompletely communicated, the system intelligently modifies the column-wise main transmission path 20 into a zigzag shape (such as the zigzag column-wise main transmission path 20A shown in FIG. 8 or FIG. 9) including an adjacent bypass transmission path 31 of the display box before open circuit and an adjacent bypass transmission path 32 of the display box where open circuit occurs;
step S5, referring to fig. 10 as a specific example, when the system detects that there is an incompletely communicated row open circuit signal in one of the row-wise main transmission paths 20 and all the adjacent bypass transmission paths of the display box 10 before the circuit is opened are row open circuit signals, the row-wise main transmission path 20 is intelligently shortened to the display box before the circuit is opened, and the row-wise main transmission path 20 of the adjacent row also includes a branch transmission path 20C, and the adjacent bypass transmission path 32 of the display box with circuit breaking occurrence is connected in series to the display box with circuit breaking occurrence and the row-wise display box connected behind the display box with circuit breaking occurrence.
The implementation principle of the embodiment is as follows: the method comprises the steps of establishing at least three sets of display modes with priority order by utilizing the display control method and an arrayed serial signal transmission network formed by splicing, wherein the first priority display mode is a column-direction main transmission path 20 (shown in figure 7) which is not in a row direction of a bypass transmission path 30 and has the shortest transmission path, when a display black area (namely a certain column of display boxes 10 which are not displayed) exists in the normal display mode, detecting an incompletely communicated column open circuit signal, intelligently starting the second priority display mode, modifying the column-direction main transmission path 20 with the display black area into a zigzag shape, modifying the column-direction transmission path into the zigzag shape (shown in figure 8 or figure 9), bypassing a data transmission open circuit point, and normally displaying the display boxes 10 in a specific column in a zigzag manner, when the display black area still exists in the second priority display mode, modifying the incompletely communicated column open circuit signal and the adjacent bypass transmission paths of the display boxes before open circuit into the zigzag shape (shown in figure 8 or figure 9) by taking the row open circuit signal, intelligently starting the third priority display mode, shortening the column-direction main transmission path 20 to the open circuit box 10 before open circuit, and simultaneously displaying the main transmission paths of the main transmission paths in the column direction (shown in figure 20) which the main transmission paths are in the normal display boxes 10) which are in the main display boxes 20 and the main transmission paths which are in the main display boxes 10 and branch. Therefore, the hardware does not need to be adjusted and replaced manually, and the line detection of shutdown is also not needed.
Referring to fig. 4, in a preferred example, in the step of providing the tiled LED display, M shunts 40 are connected to the beginning ends of M column-wise main transmission paths 20, and the shunts 40 are connected to the main controller 50 in series in the row direction. The M shunts 40 are connected to the starting ends of the M column-wise main transmission paths 20, and the total video data is intercepted and shunted one by one into video data of each column direction corresponding to the number of columns of the spliced array of the display cabinet 10. Referring to fig. 5, the general controller 50 is connected to one of the splitters 40 by a network bus 51, the data transmission rate of the network bus 51 may be 2.5 Gbit/s, 5 Gbit/s, 7.5 Gbit/s, or 10 Gbit/s, and the number of the network buses 51 may be one or more. In addition, in various examples, a data distributor may be used to connect a plurality of start ends of the column-wise main transmission path 20 instead of a plurality of the splitters 40. When the bus outputs the data packets to the splitter 40, the data packets include individual sub data packets, and each sub data packet has an address code and a path description therein, so that the data packets are sequentially transmitted through the installation paths.
Referring to fig. 6, in the preferred example, the signal connection structure for splicing adjacent display boxes corresponding to each display box 10 includes two pin slots 12 and two pins 11 corresponding to each other. By utilizing the number and the positions of the plug pin grooves 12 and the plug pins 11 which correspond to each other, the plug pin grooves 12 can be used for buckling the plug pins 11 of the adjacent display box bodies on one side, and the plug pins 11 can be used for buckling the plug pin grooves 12 of the adjacent display box bodies on the other side, so that the splicing of the plurality of display box bodies 10 has the corresponding relation of directions, the display box bodies 10 have the same orientation after the splicing, and the 90-degree rotary splicing or the upside-down splicing of the display box bodies 10 without the orientation is avoided. In addition, the display cabinet 10 in the first row direction from the data input side is also spliced and combined with the splitter 40, and the splitter 40 is provided with a latch groove 42 for combining with the latch 11 on the corresponding side of the display cabinet 10 in the first row direction, so that the splicing and the matrix network connection of the splitter 40 and the display cabinet 10 are realized. In various examples, the male-female relationship between the latch 11 on the corresponding side of the housing 10 and the latch slot 42 of the flow diverter 40 is shown interchangeable.
In a preferred example, the splitter 40 obtains a split data packet according to the address code, when the address code does not meet the transmission protocol, the split data packet is transmitted to the next splitter 40 based on the row-to-serial path of the splitter 40, the split data packet further includes a single data packet corresponding to the display box 10, the display box 10 obtains a corresponding single data packet based on the corresponding address code, and when the address code does not meet the transmission protocol, the single data packet is transmitted to the next display box based on the column-to-main transmission path 20. The split data packets split by video data are used as column-direction display videos, the splitter 40 intercepts and captures column by column in a row-direction series path of the splitter 40 according to address codes, the split data packets comprise single data packets corresponding to display boxes, and the single data packets are sent to the corresponding display boxes 10 according to the adjustable column-direction main transmission path 20 which can be transmitted in a straight line, can be bent, can be shortened or is branched, so that the problem of display errors caused by data packet loss or mistransmission is avoided.
In a preferred example, each display box 10 is provided with a control card having two main signal ports and two auxiliary signal ports. The control card is used to correspond to two main signal ports and two auxiliary signal ports of each display box 10, when the boxes are spliced, the main signal ports establish the connection in the row direction of the main transmission path 20, and the auxiliary signal ports establish the row direction bypass transmission path 30. In a specific example, referring to fig. 6, each display box 10 is configured with four interfaces, namely, an upper interface, a lower interface, a left interface, a right interface, a main interface (in a height direction of the tiled LED display screen) positioned above and below the main interface can be used as the main signal gateway, and auxiliary interfaces (in a width direction of the tiled LED display screen) positioned on the left side and the right side are used as the auxiliary signal gateway, where the main interface is specifically a G interface for high-speed data transmission, and the auxiliary interfaces are specifically MIPI interfaces or LVDS interfaces with a slower speed, so as to save equipment cost.
In a preferred example, the interface of the display box 10 is spliced by using a signal connection structure of a hard bolt 11, and according to the position of the bolt 11, the signal feedback condition of the display box 10 corresponding to the position of the signal line can be directly obtained. The signal connection structure of the hard bolt 11 is used for splicing the display box body 10 to form a transmission network, connecting wires of the series matrix transmission network are saved after the large display screen is spliced, the connecting wires which are not exposed on the back of the display screen are omitted, the establishment of the series matrix transmission network is determined by the completion of splicing operation, labor and time are saved, and the components of the spliced large display screen on the back are integrated.
In a preferred example, regarding the data transmission manner of the tiled LED display screen, the data transmission speed in the height direction between the display boxes 10 is generally faster than the data transmission speed in the width direction between the display boxes 10, so that the data is transmitted into the boxes first in the height direction, and the data is transmitted into the boxes after the data is transmitted in the height direction slowly in the width direction. The program can be installed in the box control card, or the topological structure of the system can be automatically corrected by acquiring data corresponding to the address, directly giving up the acquired data and feeding back the transmitted information.
In a preferred example, each display box 10 corresponds to a dedicated address code, and a signal transmission controller is disposed in the display box 10, so that the signal communication condition of the display box 10 can be obtained through the address code. By combining the exclusive address code of the display box 10 with the corresponding single data packet, the signal transmission controller in the display box 10 returns the address code of the received corresponding single data packet as a communication detection signal, so that the signal communication condition of the display box 10 can be obtained through the address code. When the connection detection signal with the address code is not received within a specific time, the reverse derivation of the open circuit signal under different priority display modes can be performed.
In a preferred example, the signal transmission controller uses a full duplex signal to enable the display box 10 to receive a display signal and output a feedback signal. The signal transmission controller using the full duplex signal displays the reception of the signal and the output of the feedback signal in the display housing 10 at the same time period to quickly confirm the communication condition of the transmission path in the currently used display mode.
Referring to fig. 7, in the first priority display mode, the column-wise main transfer paths 20 are all in a straight row direction, having the fastest display response rate. Referring to fig. 8, when the system detects the first priority display mode, it will generate the display black area, i.e. adjust the column main transmission path with the display black area to be the zigzag column main transmission path 20A, in the example case of fig. 8, the open point of the column main transmission path is between the display box numbers A1 and A2, and the display black area is the display box numbers A2, A3, A4 in the first priority display mode, so it switches to the second priority display mode, the column main transmission path of the a straight line is modified to be the zigzag column main transmission path 20A (number a'), and the path of the bypass transmission paths 31, 32 is led to be the zigzag, the display black area in the original first priority display mode is modified to be the non-display black area in the second priority display mode. In the algorithm setting, the zigzag column-direction main transmission path is partially overlapped with the adjacent straight column-direction main transmission path as much as possible, and is prevented from being partially overlapped with the adjacent zigzag column-direction main transmission path.
In another example, referring to fig. 9, when the system detects the first priority display mode, the black display area is generated, and in the example of fig. 9, the disconnection point of the column main transmission path is between the display box numbers B3 and B4 and between the display box numbers C2 and C3, and the black display area is the display box numbers B4, C3 and C4 in the first priority display mode, so that the display mode is switched to the second priority display mode, the column main transmission paths in the column direction of B and C are respectively modified into zigzag column main transmission paths 20A (numbers B 'and C'), the paths of the bypass transmission paths 31 and 32 are introduced into the zigzag form, the black display area in the original first priority display mode is modified into a zigzag form, and the black display area is not generated in the second priority display mode.
Referring to fig. 10, when the system detects that the display black area is generated in the first priority display mode, the feedback signal is still incomplete in the second priority display mode, and the system switches to the third priority display mode, for example, a disconnection point occurs between the display boxes A1 and A2 and between the display boxes A1 and B1, which results in that the bypass path cannot be introduced, at this time, the column direction of the a row is modified to the main transmission path to be the shortened column direction main transmission path 20B (numbered a'), and the column direction of the B row is additionally added to the main transmission path to include the branch transmission path 20C (numbered BA of the branch transmission path), and the bypass transmission path 32 is taken to the display box (numbered A2) and the display boxes (numbered A3 and A4) at the time of the disconnection of the a row.
As for the more complete but not necessary fourth priority display mode, the case is exemplified in which a column-wise main transmission path is broken between the shunt and the adjacent display cabinet, and the column-wise main transmission path having the front-end broken is abandoned, and the adjacent column-wise main transmission path includes the bent-in branch transmission path 20C, and the bent-in position has greater design flexibility.
In addition, another embodiment of the present invention discloses a display control device of a tiled LED display screen, which is used for executing a display control method of the tiled LED display screen according to any of the above technical solutions, or/and referring to fig. 4, the display control device includes:
the main controller 50 is configured to manage video data capable of displaying a tiled LED display screen, and divide the video data into a plurality of column-wise split data packets, where each column-wise split data packet includes a plurality of single data packets of the display box 10 that are tiled in the same column;
a plurality of shunts 40 disposed at one side of the tiled LED display, the shunts 40 being connected in series in a row direction to the main controller 50, and
the spliced LED display screen is formed by splicing a plurality of array spliced display boxes 10, the array splicing of the display boxes 10 forms an array type serial signal transmission network, and the signal transmission network comprises a column-direction main transmission path 20 formed by spliced columns corresponding to the display boxes 10 and a row-direction bypass transmission path 30 formed by spliced rows corresponding to the display boxes 10.
The implementation principle of the embodiment is as follows: the signal transmission network is composed of a row-direction main transmission path 20 and a row-direction bypass transmission path 30, so that the display control device provides a plurality of priority display modes with adjustable video transmission paths, avoids the formation of a display black area, and eliminates the manual detection and hardware replacement which are required to stop the display in the prior art.
In a preferred example, referring to fig. 7 to 10, based on the connection condition of the column-wise main transmission path 20, the packet transmission path is selected from any one of the branch transmission paths 20C that directly utilizes the column-wise main transmission path 20, modifies the column-wise main transmission path 20A into a zigzag shape, and shortens the column-wise main transmission path 20 and also adds to the column-wise main transmission path 20 of the adjacent column. At least three sets of priority display modes are established by using a packet transmission path selected in sequence from any one of the column main transmission path 20, which is directly used, the column main transmission path 20 is modified to be zigzag, and the branch transmission path 20C, which is shortened in the column main transmission path 20 and is added to the column main transmission path 20 of the adjacent column, and the display box following the column can be displayed by the row bypass transmission path 30 under the condition that the column main transmission path 20 has a break point.
In a preferred example, a network bus 51 and an anti-serial network bus 52 are connected in series to the input and output of the splitter 40, respectively, and communicate with the general controller 50. When the network bus 51 of the forward serial path fails or is broken, the anti-serial network bus 52 can replace the forward network bus 51, and still output the data packet to the splitter 40 from the input side to the output side.
Compared with the prior art, the technical scheme has the advantage of convenience in installation, in the background technology, the display screens are sequentially connected through a plurality of network cables, the higher the display requirement is, the more disordered the network cable connection is, when the controller transmits data to the display screens, firstly, hardware partitions (for example, 16 partitions in the case of 2K screens and 16 pairs of network cables are needed; 64 partitions in the case of 4K screens and 64 pairs of network cables are needed) need to be set, and secondly, after the hardware partitions are specifically connected, a professional is required to input a topological structure into the controller according to the positions of the sequentially connected display screens. According to the method and the device, partitioning and inputting of the topological structure are not needed during wiring, and the position of the display can be obtained after the display screen is connected.
The embodiments of the present invention are only used as preferred embodiments for understanding or implementing the technical solution of the present invention, and not to limit the scope of the present invention, and all equivalent changes made by the structure, shape and principle of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A display control method of a spliced LED display screen is characterized by comprising the following steps:
providing a spliced LED display screen, which is formed by splicing a plurality of display boxes (10), wherein M multiplied by N arrays of the display boxes (10) are spliced to form an array-type serial signal transmission network, wherein M is the number of columns, N is the number of rows, and the signal transmission network comprises M column-direction main transmission paths (20) formed by splicing columns corresponding to the display boxes (10) and N row-direction bypass transmission paths (30) formed by splicing rows corresponding to the display boxes (10);
when the system detects that the column-direction main transmission path (20) is completely communicated, video data are transmitted in the same column direction of the column-direction main transmission path (20) to display a plurality of display boxes (10) corresponding to the spliced columns;
when the system detects that one of the column-direction main transmission paths (20) has an incompletely communicated column open circuit signal, intelligently modifying the column-direction main transmission path (20A) into a zigzag shape, wherein the zigzag shape comprises an adjacent bypass transmission path (31) of the display box body before open circuit and an adjacent bypass transmission path (32) of the display box body when open circuit occurs;
when the system detects that one of the row-direction main transmission paths (20) has an incompletely communicated row open circuit signal and the adjacent bypass transmission paths of the display box body before the circuit is opened are all row open circuit signals, the row-direction main transmission path (20B) is intelligently shortened to the display box body before the circuit is opened, meanwhile, the row-direction main transmission path (20) of the adjacent row also comprises a branch transmission path (20C), and the adjacent bypass transmission path of the display box body which generates the circuit is connected in series to the display box body which generates the circuit and the row-direction display box body which is connected behind the display box body which generates the circuit.
2. The display control method of the spliced LED display screen according to claim 1, wherein each display box (10) is provided with a control card, the control card is provided with two main signal net ports and two auxiliary signal net ports, in the step of providing the spliced LED display screen, the system further comprises a master controller (50) serving as a master controller, when the master controller (50) and the display box (10) establish communication, the control card of the display box (10) acquires width and height information of pixels of the box display screen (10) and transmits the width and height information to the master controller (50), the master controller (50) automatically generates a topological structure based on the acquired position information and width and height information of the box display screen (10) and is used for transmitting corresponding display data to each box display screen (10) according to box addresses, specifically, each display box (10) is provided with four interfaces, namely, an upper interface, a lower interface, a left interface, a lower interface, a main interface, a left interface, a right interface, a side interface, a left interface and a right interface, a data transmission performance of the main interface is higher than that of the auxiliary signal net ports.
3. The display control method of the tiled LED display screen according to claim 2, wherein the data transmission speed in the height direction between the display boxes (10) is faster than the data transmission speed in the width direction between the display boxes, a program is installed in a control card of the display boxes (10), or data corresponding to an address is obtained first, and then the obtained data is directly abandoned, and the transmitted message feedback is used to automatically correct the topological structure of the system.
4. The display control method of the spliced LED display screen according to claim 1, wherein the interface splicing of the display box body (10) adopts a signal connection structure of a hard bolt, the signal feedback condition of the display box body (10) corresponding to the signal line position can be directly acquired according to the bolt position, and specifically, the signal connection structure corresponding to each display box body (10) and used for splicing adjacent display box bodies comprises two bolts (11) and two bolt slots (12) corresponding to each other.
5. The display control method of the spliced LED display screen as claimed in any one of claims 1 to 4, wherein each display box (10) corresponds to a dedicated address code, a signal transmission controller is arranged in the display box (10), and the signal communication condition of the display box (10) can be obtained through the address code.
6. The display control method of the spliced LED display screen as claimed in claim 5, wherein the signal transmission controller adopts full duplex signals, so that the display box body (10) can receive display signals and output feedback signals.
7. The display control method of the tiled LED display screen according to claim 5, wherein in the step of providing the tiled LED display screen, M shunts (40) are connected corresponding to the starting ends of the M column main transmission paths (20), and the shunts (40) are connected in series to the main controller (50) in the row direction.
8. The display control method of the tiled LED display screen according to claim 7, wherein the splitter (40) obtains a split data packet according to the address code, and when the address code does not pass the transmission protocol, the split data packet is transmitted to the next splitter based on the row-to-row serial path of the splitter (40), and the split data packet further includes a single data packet corresponding to the display box (10), and when the address code does not pass the transmission protocol, the display box (10) obtains a corresponding single data packet based on the corresponding address code, and when the address code does not pass the transmission protocol, the single data packet is transmitted to the next display box based on the column-to-main transmission path (20).
9. A display control device of a tiled LED display screen, for executing the display control method of the tiled LED display screen according to any one of claims 1-8.
10. The utility model provides a display control device of concatenation formula LED display screen which characterized in that includes:
the main controller (50) is used for managing video data capable of displaying a spliced LED display screen, dividing the video data into a plurality of column-direction flow distribution data packets, wherein each column-direction flow distribution data packet comprises a plurality of single data packets which are spliced in the same column and correspond to the display box body (10);
a plurality of shunts (40) disposed at one side of the tiled LED display screen, the shunts (40) being connected in series in a row direction to the main controller (50), an
The spliced LED display screen comprises a plurality of display boxes (10) spliced in an array manner to form the spliced LED display screen, wherein the array splicing of the display boxes (10) forms an array-type serial signal transmission network, and the signal transmission network comprises a column-direction main transmission path (20) formed by splicing columns corresponding to the display boxes (10) and a row-direction bypass transmission path (30) formed by splicing rows corresponding to the display boxes (10);
preferably, based on the connection condition of the column to the main transmission path (20), the data packet transmission path is selected from any one of a branch transmission path (20C) which directly uses the column to the main transmission path (20), modifies the column to the main transmission path (20A) into a zigzag shape, and shortens the column to the main transmission path (20B) and increases the column to the main transmission path of the adjacent column;
preferably, the input end and the output end of the series-connection shunt (40) are respectively connected with a network bus (51) communicated with the master controller (50) and an anti-series network bus (52).
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| CN202211583767.2A CN115762396A (en) | 2022-12-10 | 2022-12-10 | Display control method and device of spliced LED display screen |
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| CN202211583767.2A CN115762396A (en) | 2022-12-10 | 2022-12-10 | Display control method and device of spliced LED display screen |
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Cited By (3)
| 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 |
| CN117789616A (en) * | 2024-02-27 | 2024-03-29 | 德氪微电子(深圳)有限公司 | Connection method, display screen, device and computer readable storage medium for LED box |
| CN117789616B (en) * | 2024-02-27 | 2024-05-10 | 德氪微电子(深圳)有限公司 | Connection method, display screen, device and computer readable storage medium for LED box |
-
2022
- 2022-12-10 CN CN202211583767.2A patent/CN115762396A/en active Pending
Cited By (4)
| 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 |
| CN117789616A (en) * | 2024-02-27 | 2024-03-29 | 德氪微电子(深圳)有限公司 | Connection method, display screen, device and computer readable storage medium for LED box |
| CN117789616B (en) * | 2024-02-27 | 2024-05-10 | 德氪微电子(深圳)有限公司 | Connection method, display screen, device and computer readable storage medium for LED box |
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