CN112068790A - Tiled display system - Google Patents
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- CN112068790A CN112068790A CN202010915872.6A CN202010915872A CN112068790A CN 112068790 A CN112068790 A CN 112068790A CN 202010915872 A CN202010915872 A CN 202010915872A CN 112068790 A CN112068790 A CN 112068790A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1431—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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Abstract
The invention provides a splicing display system, which comprises a distribution board and a set number of lamp panels in cascade connection; the distribution board comprises a receiving module, a processing module and an encoding module; the receiving module is used for receiving video data, the processing module is used for dividing the video data according to the positions of the lamp panels in the spliced display screen, and the encoding module is used for encoding the divided video data according to a set encoding and decoding mode; the lamp panel comprises a decoding module and a driving module; the decoding module is used for extracting video data packets required by the lamp panel from the coded video data and transmitting the residual video data packets in the coded video data to the next-stage lamp panel of the lamp panel; the decoding module is also used for decoding the video data packet required by the lamp panel according to a set encoding and decoding mode, and the driving module is used for converting the decoded video data into a physical signal to control the display of the lamp beads. Through the scheme, the cascade connection of more lamp panels in large-screen display can be realized, the signal transmission stability is ensured, and the system cost is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a splicing display system.
Background
At present, large-screen display is generally realized by adopting a splicing mode. Fig. 1 is a schematic diagram of a tiled display system in the prior art, and referring to fig. 1, the tiled display system generally includes a transmitting card, a plurality of receiving cards, and a display screen. Long distance transmission is usually required between the sending card and the receiving card, so network protocol transmission is usually adopted. The flat cable transmission is needed between the receiving card and the lamp panel of the display screen. A plurality of lamp panels can be cascaded in the display screen, and the lamp panels of two adjacent stages are connected through flat cables. The sending card receives video signals of a video source sent by the broadcast control equipment, splits the video signals into multiple paths according to the structure of the display screen, and sends the split video signals to the receiving card through the network cable. After the receiving card receives the corresponding video signal, the corresponding control signal and the video signal are output to a corresponding path of cascaded lamp panels according to the driving requirement of the display screen, and each lamp panel can realize small-area image display. The requirement of large screen display is realized through the splicing of the lamp panels.
However, in the existing tiled display system, since the loading area of the receiving card is not large, a large number of receiving cards are usually required to realize the ultra-large screen display. For example, in a display screen with 1080P pixel range, the average usage amount of the receiving cards is about 32-64. Thus, the use of a receiver card significantly increases the cost of the large screen display. In addition, in a cascaded lamp panel, video signals are gradually weakened, long lamp panel cascading is difficult to achieve, and unstable signal transmission is easily caused.
Disclosure of Invention
In view of this, the invention provides a tiled display system to realize the cascade connection of more lamp panels in large-screen display, ensure the stability of signal transmission, and reduce the system cost.
In order to achieve the purpose, the invention is realized by adopting the following scheme:
according to an aspect of an embodiment of the present invention, there is provided a tiled display system, the system including a distribution board and a set number of lamp panels;
the distribution board comprises a data receiving module, a receiving end data processing module and an encoding module; the data receiving module is used for receiving video data, the receiving end data processing module is used for segmenting the video data according to the positions of the lamp panels in the spliced display screen, and the coding module is used for coding the segmented video data according to a set coding and decoding mode;
the lamp panels with the set number are in cascade connection; the lamp panel comprises a decoding module and a driving module; the decoding module is used for extracting video data packets required by the lamp panel from the coded video data and transmitting the residual video data packets in the coded video data to the next-stage lamp panel of the lamp panel; the decoding module is further used for decoding the video data packets required by the lamp panel according to the set encoding and decoding mode, and the driving module is used for converting the decoded video data into physical signals so as to control the lamp beads on the lamp panel to display by utilizing the physical signals.
In some embodiments, the tiled display system includes a plurality of display modules, each of the display modules including the set number of lamp panels; the plurality of display modules are connected in cascade; the first-stage lamp panel of the first-stage display module acquires the coded video data required by all the display modules from the distribution board; and the decoding module of the last-stage lamp panel in the display module is used for transmitting video data packets except the video data packet required by the display module in the coded video data to the first-stage lamp panel in the next-stage display module of the display module.
In some embodiments, the tiled display system includes a plurality of display modules, each of the display modules including the set number of lamp panels; and the first-stage lamp panel in each display module acquires the coded video data corresponding to the display module from the distribution board.
In some embodiments, the tiled display system further comprises: the transmitting card comprises a data acquisition module, a broadcast control end data processing module and a data transmitting module; the data acquisition module is used for acquiring video data; the broadcast control end data processing module is used for sending and processing the acquired video data; and the data sending module is used for sending the video data after sending processing to the distribution board.
In some embodiments, the data receiving module and the data sending module are both network interface modules; the sending card sends the collected video data to the distribution board through network transmission.
In some embodiments, the sending card and the dispensing card are in a one-to-one or one-to-many combination, or a mixed one-to-one and one-to-many combination.
In some embodiments, the distribution card further comprises a receiving end mother chip, the receiving end mother chip comprising the receiving end data processing module and the encoding module; the lamp panel further comprises a sub-chip, and the sub-chip comprises the decoding module and the driving module.
In some embodiments, the sending card further includes a broadcast control end mother chip, and the broadcast control end mother chip includes the data acquisition module and the broadcast control end data processing module.
In some embodiments, the distribution plate and the lamp panel are connected by a flat cable.
In some embodiments, the distribution board and the lamp panel are electrically connected by a set type of connection line; wherein, the number of the lines contained in the set type connecting line is less than that of the lines contained in the required flat cable; the set type connecting line can transmit video data coded according to the set coding and decoding mode.
In some embodiments, two adjacent lamp panels are electrically connected through the set type connecting line.
In some embodiments, the set TYPE connection line is a network line, an HDMI data line, a DVI data line, a DP data line, a TYPE-C data line, or a USB data line.
In some embodiments, the set codec mode includes at least one of a first type codec and a second type codec; the first type of coding and decoding is coding and decoding of LDPC, RS, Turbo, Polar or convolutional codes; the second type of codec is a codec of scrambling codes 4B5B, 8B10B, or 64B 66B.
According to the splicing display system provided by the embodiment of the invention, the decoding and driving control of signals can be realized on the lamp panel through the decoding module and the driving module which are arranged on the lamp panel, so that coded video data can be transmitted between the cascaded lamp panels instead of directly transmitting original video signals, and the problem of signal attenuation in the cascading transmission process of the signals can be avoided. In addition, the distribution card can bear the data division task, so that video data can be transmitted to the distribution card from the broadcasting control end and then divided, the divided data are transmitted to the lamp panel, the carrying capacity of the distribution board is greatly increased compared with the carrying capacity of the receiving card, the number of the distribution boards can be reduced, the using amount of the distribution card is reduced, the cost is reduced, the plug interface between the distribution card and the sending card can be simplified, and meanwhile, the stability of signal transmission can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of a tiled display system according to the prior art;
FIG. 2 is a schematic structural diagram of a tiled display system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a tiled display system according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a tiled display system according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a tiled display system according to yet another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a tiled display system according to another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a tiled display system according to yet another embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a tiled display system according to yet another embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a tiled display system according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a tiled display system according to still another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should be noted in advance that the features described in the following embodiments or examples or mentioned therein can be combined with or replace the features in other embodiments or examples in the same or similar manner to form a possible implementation. In addition, the term "comprises/comprising" as used herein refers to the presence of a feature, element, step or component, but does not preclude the presence or addition of one or more other features, elements, steps or components.
Fig. 2 is a schematic structural diagram of a tiled display system according to an embodiment of the invention, and as shown in fig. 2, the tiled display system according to some embodiments includes a distribution board 110 and a set number of lamp panels 210.
The distribution board 110 comprises a data receiving module 111, a receiving end data processing module 112 and an encoding module 113; the data receiving module 111 is configured to receive video data, the receiver data processing module 112 is configured to divide the video data according to the position of each lamp panel 210 in the tiled display screen, and the encoding module 113 is configured to encode the divided video data according to a set encoding and decoding manner.
The video data may also be referred to as a video signal, a video image signal, an image signal, or the like, and may refer to a dynamic or static image signal or image data, including all data required for displaying at a corresponding position in the display screen 200. The distribution board can receive video data from external transmission, and when remote transmission is required, the distribution board can receive video data through a network transmission protocol, so the data receiving module 111 can be a network interface module. Specifically, the network interface module may include an existing network transmission chip, such as an ethernet PHY chip (physical layer chip), which may implement a network protocol decoding function, and may further include a network transformer, etc. In other embodiments, the distribution board may receive the video data via a cable, and may receive the video data via other transmission protocols.
The receiving end data processing module 112 and the encoding module 113 may be provided on the same chip. As shown in fig. 3, the distribution board 110 may further include a receiving end mother chip 114, and the receiving end mother chip 114 may include the receiving end data processing module 112 and the encoding module 113. Of course, other modules may be required on the receiving mother chip 114. The receiving end data processing module 112 may be implemented according to a data processing module in an existing receiving card, and the encoding module 113 may be implemented according to an existing module for encoding video data, so that the receiving end mother chip 114 may implement a required module based on a general-purpose chip. In other embodiments it is not excluded that the receiving end data processing module 112 and the encoding module 113 may be provided on different chips. The receiving end mother chip may be an ASIC chip.
In addition, the lamp panel 210 may refer to a smallest display unit in the display screen 200. Above-mentioned lamp plate 210 of setting for quantity can indicate the partial or whole lamp plate in display screen 200, for example, display screen 200 can contain a plurality of display module assembly, then above-mentioned lamp plate 210 of setting for quantity can indicate the whole lamp plates in a display module assembly in display screen 200, or can indicate the total lamp plate quantity of a plurality of display module assembly. Different lamp plates can be the same in display screen 200, and the quantity of lamp plates is the same or similar in different display module assemblies in display screen 200. Each driving module is not limited to driving one module, and can drive a plurality of display modules simultaneously. If the driving modules correspond to the display modules one to one, the driving modules can be directly placed in the modules; if the driving module and the display module are in a one-to-many relationship, the driving module can be placed near the corresponding module.
The number and arrangement of the lamp panels 210 in the display screen 200 may be predetermined according to the requirements. The receiver data processing module 112 may obtain not only the video data but also information such as the arrangement of the lamp panels of a predetermined number of lamp panels, and may implement the division of the video data by using a video data division method or the like in the existing transmitting card. The specific splitting method can be implemented according to the data splitting part in the existing sending card. The video data after each division may be encoded and packed by the encoding module 113, and then packed into one data packet, or may be divided into a plurality of data packets.
The lamp panels 210 with the set number are in cascade connection; the lamp panel 210 includes a decoding module 211 and a driving module 212; the decoding module 211 is configured to extract a video data packet required by the lamp panel from the encoded video data (data transmitted from the distribution board 110), and transmit the remaining video data packets in the encoded video data to the next-stage lamp panel of the lamp panel; the decoding module 211 is further configured to decode a video data packet required by the lamp panel 210 according to the set encoding and decoding manner, and the driving module 212 is configured to convert decoded video data into a physical signal, so as to control the lamp bead 213 on the lamp panel to display by using the physical signal. The lamp panels 210 with the set number may be part of the lamp panels (e.g., lamp panels in one display module) in the display screen 200, or may be all the lamp panels in the display screen 200. In this embodiment, all of the lamp panels 210 in the set number may be cascaded in series.
The decoding module 211 and the driving module 212 may be disposed on the same chip. As further shown in fig. 3, the lamp panel 210 may further include a sub-chip 214, and the sub-chip 214 includes the driving module 212 and the decoding module 211. Of course, the sub-chip 214 may also include other possible modules. The driving module 212 may be implemented according to a driving module in an existing receiving card, and the decoding module may be implemented according to an existing module for decoding video data, so that the sub-chip 214 may implement the required modules based on a general-purpose chip. In other embodiments, it is not excluded that the decoding module 211 and the driving module 212 may be disposed on different chips. The sub-chip may be an ASIC chip.
Some or all of the lamp panels in the display screen 200 may be cascaded, which means that data required by the lamp panels may be transmitted from the lamp panel from which data is initially obtained, and the lamp panels may form a connection path, or may not exclude a main path, and may form a branch path based on the main path.
In the prior art, video data are converted into signals required by lamp beads on a receiving card (the receiving card and the lamp panel are known by a flat cable), and after the signals required by the lamp beads are transmitted to the lamp panel, the signals are attenuated gradually in the process of transmitting the lamp panel step by step due to the fact that the lamp panel is not controlled by the signal, and therefore long lamp panel cascade is difficult to realize, multiple paths of connection are required to be established between the receiving card and the lamp panels, the complexity of a jack is increased, and the instability factor of the signals is improved. Different from the prior art, the video data of the embodiment of the invention can be driven and controlled by the driving module on the lamp panel after the data packet of the video data reaches the lamp panel to obtain the signal required by the lamp bead. Therefore, the embodiment of the invention can realize very long lamp panel cascade connection, thereby reducing the electric connecting wires used between the distribution board and the display screen, simplifying the interface, reducing the influence factor of signal instability and further reducing the cost.
Furthermore, the lamp panel on the display screen 200 may be divided into display modules. The lamp panels in each display module may be cascaded, for example, may be cascaded in series. The display modules may be cascaded, e.g., cascaded in series, or may be non-cascaded and may each obtain the desired data from the distribution board. Of course, the cascade connection between the lamp panels and the cascade connection between the display modules can be connected with the parts of the two adjacent stages through the set type connecting lines.
For example, as shown in fig. 4, in the tiled display system, a display screen 200 may include a plurality of display modules 220, and each display module 220 includes the set number of lamp panels 210 (fig. 4 shows four lamp panels, which is only used as an example for illustration, and does not limit the number of lamp panels included in each display module); the plurality of display modules 220 are connected in cascade; the first-stage lamp panel of the first-stage display module 220 acquires the encoded video data required by all the display modules from the distribution board; the decoding module of the last-stage lamp panel in the display module 220 is configured to transmit video data packets, except for the video data packet required by the display module, in the encoded video data to the first-stage lamp panel in the next-stage display module of the display module.
The first-stage display module may refer to a display module which is not connected with other display modules between the first-stage display module and the encoding module 113, the first-stage lamp panel in one display module may refer to a lamp panel which is the first to reach the data received by the display module, and the last-stage lamp panel in one display module may refer to a lamp panel which finally obtains the required data in the display module.
For another example, as shown in fig. 5, the display screen 200 includes a plurality of display modules 220, and each display module 220 includes the set number of lamp panels 210 (fig. 5 shows four lamp panels, which is only used as an example for illustration, and does not limit the number of lamp panels included in each display module); the first-stage lamp panel in each display module 220 obtains the encoded video data corresponding to the display module from the distribution board. According to the number of the lamp panels included in the display module and the signal delay caused by data transmission in the cascade process, the display module can be selectively divided into multiple cascade paths, and each path can acquire signals from the distribution board.
In a further embodiment, the tiled display system of embodiments of the present invention can further include a transmitter card. The transmitting card can receive a video source signal from a broadcast control device (e.g., a computer, a video processing device) and transmit the video source signal to the distribution card. The sending card front end may be responsible for the processing of the video images by a video processor.
Fig. 6 is a schematic structural diagram of a tiled display system according to another embodiment of the present invention, and as shown in fig. 6, the system shown in fig. 2 may further include a transmitting card 310. The transmitting card 310 may include a data collecting module 311, a broadcast control end data processing module 312, and a data transmitting module 313; the data acquisition module 311 is configured to acquire video data; the broadcast control end data processing module 312 is configured to send and process the acquired video data; the data sending module 313 is configured to send the video data after sending processing to the distribution board 110.
The data collection module 311 may be implemented according to a data collection module in an existing transmission card. The broadcast control end data processing module 312 can perform conventional processing related to transmission, and can be implemented according to a data processing module related to conventional processing in an existing transmission card, and the main difference is that the broadcast control end data processing module 312 of this embodiment does not need to perform data splitting processing, because data splitting can be implemented in the distribution board 110. In addition, in the case that data is transmitted between the transmitting card 310 and the distributing board 110 according to a network transmission protocol, the data transmitting module 313 may be a network interface module, which may include an existing network transmission chip, such as an ethernet PHY chip, and may implement a network protocol encoding function, and may further include a network transformer, etc. The data receiving module and the data sending module are both network interface modules, and the sending card can send the collected video data to the distributing board through network transmission, so that the long-distance data transmission between the sending card and the distributing board can be realized.
The data acquisition module 311 and the broadcast control data processing module 312 may be implemented on the same chip. As shown in fig. 7, the sending card 310 may include a play control end mother chip 314 thereon, and the play control end mother chip 314 may include a data acquisition module 311 and a play control end data processing module 312. Unlike the prior art in which a master control chip on a transmitting card is responsible for master control tasks such as data segmentation, the broadcast control end chip of the embodiment of the present invention is mainly used for implementing data acquisition and data processing functions without data segmentation. Therefore, the broadcasting control end mother chip can realize the required modules based on the general-purpose chip. In other embodiments, it is not excluded that the data acquisition module 311 and the broadcast control data processing module 312 are implemented on different chips. The broadcast control end mother chip can be an ASIC chip.
The data receiving module 111 and the data sending module 313 may both be network interface modules; the transmitting card 310 may transmit the captured video data to the distribution board through network transmission. Specifically, the network interface module may include an existing network transmission chip, such as an ethernet PHY chip, which may implement a network protocol decoding function, and may further include a network transformer. In other embodiments, the distribution board may receive the video data via a cable, and may receive the video data via other transmission protocols.
In addition, the sending card 310 and the distribution board 110 may be selected to be a one-to-one or one-to-many combination, or a mixed one-to-one and one-to-many combination, according to specific situations, such as the number of lamp panels, the loading area of lamp panels, and the like.
In further embodiments, the distribution board 110 and the lamp panel 210 may be connected by various connecting wires. For example, as shown in fig. 8, the distribution plate 110 and the lamp panel 210 may be connected by a flat cable (e.g., a conventional flat cable).
In the existing display system, the sending card and the module (lamp panel) are connected by flat cables (as shown in fig. 1), each flat cable may include dozens of cables, and each cable in the flat cables brings signal instability with a certain probability to the large-screen display, so that the use of a large number of flat cables brings signal instability with a higher probability to the large-screen display.
To solve this problem, further embodiments seek to replace the flat cables used in the conventional display systems with connecting wires comprising a small number of wires.
As shown in fig. 9, the distribution board 110 and the lamp panel 210 may be electrically connected by a predetermined type of connection line; wherein, the number of the lines contained in the set type connecting line is less than that of the lines contained in the required flat cable; the set type connecting line can transmit video data coded according to the set coding and decoding mode. The number of wires included in the set type of connection lines is less than the number of wires included in the required flat cable, which is used to indicate that the connection lines used between the distribution board and the lamp panel in the embodiment of the present invention may include a small number of wires. The signal instability brought to large-screen display by the connecting wires can be reduced by adopting the connecting wires containing a small number of wires between the distributing plate and the lamp panel.
In this case, the decoding module 211 can acquire the video data encoded by the encoding module 113 from the distribution board 110 through the above-mentioned set type connection line, and can decode the encoded video data to obtain various data (including the video data itself and instruction data, etc.) as required. One lamp panel may include one or more lamp beads, which may be, for example, LED lamp beads. The driving module 212 may convert various decoded data into physical signals, which may directly drive the lamp beads 213 to display, for example, including original video signals, clock signals, control signals, and the like. Therefore, the lamp beads are driven by the driving module arranged on the lamp panel, transmitted data can be converted into various original signals after reaching the lamp panel, and the original signals (physical signals) can directly reach the lamp beads through PCB wiring and the like.
The coding module 113 in the distribution board 110, the decoding module 211 in the lamp panel 210, and the set type connection line are combined together, so that the required data can be transmitted from the distribution board 110 to the lamp panel 210 according to the set codec protocol. The set codec Protocol may be in accordance with various feasible Transmission protocols, and specifically may be in accordance with various feasible video Transmission protocols, for example, may be one of Protocol codec modes such as TCP/IP (Transmission Control Protocol/Internet Protocol), HDMI (High Definition Multimedia Interface), DVI (Digital video Interface), DP (Display Port), TYPE-C, USB, and the like. The connection line can be selected as appropriate or available according to the protocol encoding mode, for example, the connection line of the setting TYPE can be one of the data lines such as a network line, an HDMI data line, a DVI data line, a DP data line, a TYPE-C data line, and a USB data line. Therefore, the required data is transmitted to the lamp panel from the distribution board protocol by adopting or selecting a proper coding and decoding mode, and various original signals are obtained by converting the required data through the driving module on the lamp panel, so that the connection between the distribution board and the lamp panel can be realized by using the set type connecting line comprising a few lines.
In addition, the data transmitted from the distribution board to the lamp panel can be encoded by using a certain channel coding mode or a communication algorithm so as to improve the data transmission quality. For example, the set codec mode may include at least one of a first type codec and a second type codec. Wherein, the first type codec and the second type codec may be a coding type considering a channel and a coding type considering a source, respectively. Specifically, for example, the first type codec may be a codec of LDPC, RS, Turbo, Polar, or convolutional code. In addition, the second type codec may be a codec of scrambling codes 4B5B, 8B10B, or 64B 66B.
Further, as shown in fig. 10, in the tiled display system shown in fig. 2, two adjacent lamp panels 210 may be electrically connected by the set type connecting line, that is, two lamp panels may be connected by a connecting line including a few lines. For example, the set TYPE connection line may be one of a network line, an HDMI data line, a DVI data line, a DP data line, a TYPE-C data line, a USB data line, and the like. Since the video data from the distribution board to the display screen is encoded by the above-mentioned set codec, the data packets required by each light panel can be transmitted through the set type connection line.
In the prior art, the flat cable is used for connecting the lamp panels of two adjacent stages, and the number of wires contained in the flat cable is large, so that the number of the plugging ports can be further increased by connecting the flat cable with the lamp panels, and the instability factor of signal transmission is increased. In the embodiment, the lamp panel is connected by the set type connecting wires containing a few wires, so that the number of the sockets can be further reduced, and the instability factor of signal transmission can be reduced.
In order that those skilled in the art will better understand the present invention, embodiments of the present invention will be described below with reference to specific examples.
Referring to fig. 1, in the conventional tiled display system, since the receiving cards need to correspond to the display modules, and one receiving card cannot control a display area with a large area in consideration of practical system limitations such as transmission rate, a plurality of receiving cards are needed in a display system with a large area, and thus a transmitting card needs to output a plurality of channels corresponding to a plurality of receiving cards. The sending card and the receiving card are typically implemented using FPGAs. A receiving card may correspond to one or more modules but the loaded area is not large, e.g., in pixels, typically limited to 256 x 256 pixels of the load. Therefore, the number of receiving cards required in a very large display screen is large. For example, in a display screen with a range of 1080P pixels, the average usage amount of the existing receiving cards is about 32 to 64. In addition, in the existing scheme, due to the complex structure, numerous connectors and sockets, the product cost is increased, the connector connection construction is time-consuming and labor-consuming, and meanwhile, due to the unstable or poor contact of the interfaces, black blocks and out-of-control display screens (or local black blocks out-of-control) are caused, thereby causing great troubles to both industry operators and product users. Moreover, the use of a large number of receiving cards greatly increases system costs. In addition, in a cascaded lamp panel, video signals are gradually weakened, long lamp panel cascading is difficult to achieve, and unstable signal transmission is easily caused.
In order to realize the cascade connection of longer lamp panels, simplify the structure of a display system, realize low cost, easy use, few connections, high stability and the like, the invention provides a splicing display system structure. To realize the cascade of long lamp panels and simplify the external configuration of the system, and to realize the functions in the existing display framework, the inventor has broken through the conventional thinking through long-term research and comparison, considers to place a part of functions in the transmitting end (distribution board), and implants another part of functions into the lamp panel of the display screen. The decoding module of lamp plate is directly transmitted with a small number of lines after this can be through code compression distribution, and the decoding module on the lamp plate shows in lamp pearl through the same decoding mode with data recovery. The coding and decoding modes completely correspond to each other, so that the design goals of simplifying and optimizing the architecture are realized by completely eliminating the intermediate links of the existing scheme.
Referring to fig. 2 to 10, in the tiled display system according to some embodiments, first, data acquisition is performed through a sending card, that is, content data and instructions to be displayed are acquired from a broadcast control end output device onto the sending card, then the data are sent from the sending card to a distribution board, then corresponding data processing and special coding compression are performed inside a mother chip of the distribution board, and then the data and the instructions are output to, for example, a network port through an I/O port of the mother chip to be transmitted to a daughter chip of a lamp panel through a network line, and the daughter chip performs corresponding decoding and restoration processing after receiving a data packet of the mother chip, so as to restore the data packet and then transmit the data and the instructions to an LED related circuit block through an I/O port of the daughter chip to drive an LED lamp to display.
The sending card can send the original image to the distribution board, and the distribution board sends the image to the unit board chip. The sending card and the distribution board as a whole perform the function of image processing, i.e. the function of the video processing unit. The cell board chip only completes the image transmission and the control function of the driving chip, and all complex image scheduling is completed by being sent to a sending card or a distribution board.
The transmission of image data between the video processing unit and the cell board chip adopts a self-defined transmission mode; an asymmetric duplex mode can be adopted between the video processing unit and the cell board chip and is used for transmitting video images and configuring data and providing a return function. One of various codes and decoders such as LDPC, RS, Turbo, Polar, convolutional codes and the like can be adopted between the video processing unit and the cell board chip; the channel data may employ one of a plurality of communication algorithms, e.g., scrambling codes 4B5B, 8B10B, 64B 66B; the specific transmission mode can be realized by multiple transmission modes such as TMDS, LVDS, DVI, v-by-one and the like.
The forward transmission data format on the channel may be, in order: … free, start flag, type, data, check, free …. Wherein the start flag may be the start of transmission of data. The types may include basic image types, register access types, and the like. Other types of displays may be extended as desired. The data may be the actual data to be transmitted, and the types and corresponding data formats may be different.
In addition, different lamp panels of the same channel can be distinguished through serial number setting, specifically, a first distribution board on a cascade channel can be automatically completed in the power-on initialization process, and data distribution is 0. When a distributor board receives a serial number setting, the serial number is automatically incremented by 1. Furthermore, a check may be performed using the above-described transmission data format, and in particular, check data may be provided for verifying whether the transmitted data is correct. If correct, it can receive normally, if incorrect, it can discard the data received by this operation, and can inform the video processing unit to resend or perform other operations.
In this embodiment, the sending card receives a signal of a video source and transmits the signal to the distribution board. The distribution board only needs to be used as a data distributor and does not directly drive the display module or the lamp panel, so that a larger-area display area can be realized. In the transmission process, the splitting operation is not required to be carried out according to the display screen, so that the video signal can be sent according to a standard video source format, the sending card can be optimized, and only the collected video source signal can be directly sent to the distribution board according to the standard format. In addition, the lamp panel of the embodiment of the invention can realize longer cascade connection, so the distribution board can only split the data into a limited plurality of groups. After the driver board receives corresponding video data, can extract the display data of the module that oneself corresponds, generate control signal and show, this makes data can transmit very far, can realize that longer lamp plate cascades. Meanwhile, the drive board transmits the received data to the next-stage drive board, so that the cascade function is realized. Each driving module is not limited to driving one module, and can drive a plurality of display modules simultaneously. If the driving modules correspond to the display modules one to one, the driving modules can be directly placed in the modules; if the driving module and the display module are in a one-to-many relationship, the driving module can be placed near the corresponding module. Since the distribution board can realize the display of a larger area image, only a small number of connections are required between the sending card and the distribution board, whereby cost can be saved. Secondly, the distribution board only needs to output a limited number of groups, and the driving board realizes the cascade function, thereby further saving the cost. Moreover, the driving module can receive video data and forward the data to the next stage, and the chip on which the driving module is based can be realized by adopting an ASIC (application specific integrated circuit), so that the cost can be greatly saved. The ASIC may include a special configuration or display control operation for a specific lamp panel, such as implementing a gamma conversion function, implementing a point-by-point correction function for display, and so on.
Compared with the existing scheme, the display screen control system architecture in the embodiment saves a plurality of intermediate connection links which can cause unstable hidden dangers. For example, in the existing architecture, a plurality of receiving cards are needed, a flat cable (a plurality of receiving cards) is needed to be connected between the receiving cards and the display screen, the connection is complex, the interfaces are numerous, and the total number of interfaces is increased when the area of the display screen is larger. Under the same bad probability value, the bad times are obviously increased in the same time. However, in the embodiment, only one distribution board is generally connected between the sending card and the display panel, and the distribution board and the display panel are connected by a small number of first connecting wires such as network cables, so that the display function and the display requirement can be achieved in the same manner in the conventional scheme.
In summary, in the tiled display system according to the embodiment of the present invention, the decoding module and the driving module are disposed on the lamp panel, so that signal decoding and driving control can be implemented on the lamp panel, and therefore, encoded video data can be transmitted between cascaded lamp panels, instead of directly transmitting the original video signal, so that the problem of signal attenuation during the cascade transmission process of the signal can be avoided. In addition, the distribution card can bear the data division task, so that video data can be transmitted to the distribution card from the broadcasting control end and then divided, the divided data are transmitted to the lamp panel, the carrying capacity of the distribution board is greatly increased compared with the carrying capacity of the receiving card, the number of the distribution boards can be reduced, the using amount of the distribution card is reduced, the cost is reduced, the plug interface between the distribution card and the sending card can be simplified, and meanwhile, the stability of signal transmission can be improved. Furthermore, a coding module is arranged on the distributing plate, a decoding module is arranged on the lamp panel, the coding module and the decoding module carry out coding and decoding on the video data according to a set coding and decoding protocol mode, and the coded video data can be transmitted to the lamp panel from the distributing plate through connecting wires with the number of the contained wires less than the set type of the flat cables. Furthermore, the cascaded lamp panels can be electrically connected through the set type connecting wires comprising a small number of wires, so that the interface can be further simplified.
In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the various embodiments is provided to schematically illustrate the practice of the invention, and the sequence of steps is not limited and can be suitably adjusted as desired.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A splicing display system is characterized by comprising distribution plates and a set number of lamp panels;
the distribution board comprises a data receiving module, a receiving end data processing module and an encoding module; the data receiving module is used for receiving video data, the receiving end data processing module is used for segmenting the video data according to the positions of the lamp panels in the spliced display screen, and the coding module is used for coding the segmented video data according to a set coding and decoding mode;
the lamp panels with the set number are in cascade connection; the lamp panel comprises a decoding module and a driving module; the decoding module is used for extracting video data packets required by the lamp panel from the coded video data and transmitting the residual video data packets in the coded video data to the next-stage lamp panel of the lamp panel; the decoding module is further used for decoding the video data packets required by the lamp panel according to the set encoding and decoding mode, and the driving module is used for converting the decoded video data into physical signals so as to control the lamp beads on the lamp panel to display by utilizing the physical signals.
2. The tiled display system of claim 1, comprising a plurality of display modules, each of the display modules comprising the set number of lamp panels; the plurality of display modules are connected in cascade; the first-stage lamp panel of the first-stage display module acquires the coded video data required by all the display modules from the distribution board; and the decoding module of the last-stage lamp panel in the display module is used for transmitting video data packets except the video data packet required by the display module in the coded video data to the first-stage lamp panel in the next-stage display module of the display module.
3. The tiled display system of claim 1, comprising a plurality of display modules, each of the display modules comprising the set number of lamp panels; and the first-stage lamp panel in each display module acquires the coded video data corresponding to the display module from the distribution board.
4. The tiled display system of claim 1, further comprising:
the transmitting card comprises a data acquisition module, a broadcast control end data processing module and a data transmitting module; the data acquisition module is used for acquiring video data; the broadcast control end data processing module is used for sending and processing the acquired video data; and the data sending module is used for sending the video data after sending processing to the distribution board.
5. The tiled display system of claim 4 wherein the data receiving module and the data sending module are both network interface modules; the sending card sends the collected video data to the distribution board through network transmission.
6. The tiled display system of claim 4,
the sending card and the distribution card are in one-to-one or one-to-many combination or mixed combination of one-to-one and one-to-many; and/or
The distribution card also comprises a receiving end mother chip, and the receiving end mother chip comprises the receiving end data processing module and the coding module; the lamp panel further comprises a sub-chip, and the sub-chip comprises the decoding module and the driving module; and/or
The transmitting card also comprises a broadcast control end mother chip, and the broadcast control end mother chip comprises the data acquisition module and the broadcast control end data processing module; and/or
The distribution plate is connected with the lamp panel through a flat cable.
7. A tiled display system according to any of the claims 1 to 6,
the distribution plate is electrically connected with the lamp panel through a set type connecting wire; wherein, the number of the lines contained in the set type connecting line is less than that of the lines contained in the required flat cable; the set type connecting line can transmit video data coded according to the set coding and decoding mode.
8. The tiled display system of claim 7, wherein adjacent two stages of lamp panels are electrically connected through the set type connection line.
9. The tiled display system of claim 7, wherein the set TYPE connection line is a network line, an HDMI data line, a DVI data line, a DP data line, a TYPE-C data line, or a USB data line.
10. The tiled display system of claim 7 wherein the set codec mode comprises at least one of a first type of codec and a second type of codec; the first type of coding and decoding is coding and decoding of LDPC, RS, Turbo, Polar or convolutional codes; the second type of codec is a codec of scrambling codes 4B5B, 8B10B, or 64B 66B.
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