CN112068788A - Tiled display system - Google Patents
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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
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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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, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 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
- H04N5/76—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, wherein the system comprises a video processing unit and a set number of lamp panels, wherein the video processing unit is electrically connected with the lamp panels through a set type connecting wire containing a few wires; the video processing unit comprises a data acquisition module, a data processing module and a coding module; the data acquisition module is used for acquiring video data; the data processing module is used for dividing the collected video data according to the positions of the lamp panels; the coding module is used for coding the segmented video data according to a set coding and decoding mode; the set type connecting line can transmit video data coded according to a set coding and decoding mode; the lamp panel comprises a decoding module and a driving module; the decoding module is used for acquiring the coded video data and decoding the coded video data according to a set coding 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. By the scheme, the signal stability of large-screen display can be improved, and the 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 modules of the receiving card and the display screen need to be transmitted by flat cables. The transmitting card receives video signals of a video source transmitted by the broadcast control equipment, splits the video signals into multiple paths according to the structure of the display screen, outputs corresponding connecting channels, transmits each channel according to a gigabit Ethernet, and transmits the split video signals to the receiving card through a network cable. And after the receiving card receives the corresponding video signal, outputting the corresponding control signal and the video signal to the lamp panel of the corresponding module according to the driving requirement of the display screen. Each channel is correspondingly connected to the driving module, and the driving module sends out the video data after receiving the video data according to the protocol required by the display module. The driving modes required by different display module types are different. Each module can comprise one or more lamp panels, and each lamp panel can realize small-area image display. And then, the requirement of large screen display is realized through corresponding module splicing.
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, the sending card and the module (lamp panel) are connected by flat cables, each flat cable can contain dozens of lines, each line in the flat cables brings signal instability with certain probability to large-screen display, and therefore the use of a large number of flat cables brings signal instability with higher probability to large-screen display.
Disclosure of Invention
In view of this, the present invention provides a tiled display system to improve the signal stability of large screen display 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, a tiled display system is provided, where the system includes a video processing unit and a set number of lamp panels, and the video processing unit and the lamp panels are electrically connected by a set type 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 video processing unit comprises a data acquisition module, a data processing module and a coding module; the data acquisition module is used for acquiring video data; the data processing module is used for dividing the collected video data according to the positions of the lamp panels in the spliced display screen; the coding module is used for coding the segmented video data according to a set coding and decoding mode; the set type connecting line can transmit video data coded according to the set coding and decoding mode;
the lamp panel comprises a decoding module and a driving module; the decoding module is used for acquiring coded video data and decoding the coded video data according to the set coding and decoding mode, and the driving module is used for converting the decoded video data into physical signals and controlling the lamp beads on the lamp panel to display by utilizing the physical signals.
In some embodiments, the video processing unit includes a sending card and a distribution board; the data processing module comprises a broadcast control end data processing module and a receiving end data processing module;
the transmitting card comprises the data acquisition module, the broadcast control end data processing module and a data transmitting module; the broadcast control end data processing module is used for sending and processing the acquired video data; the data sending module is used for sending the video data after sending processing to the distribution board;
the distribution board comprises a data receiving module, the receiving end data processing module and the coding module; the data receiving module is used for receiving video data, and 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;
the data sending module and the data receiving module are both network interface modules; the transmitting card is used for transmitting the collected video data to the distributing board through network transmission.
In some embodiments, the video processing unit comprises a sending card; the sending card comprises the data acquisition module, the data processing module and the coding module.
In some embodiments, the set codec mode includes at least one of a first type codec and a second type codec.
In some embodiments, the first type of codec is a codec of LDPC, RS, Turbo, Polar, or convolutional codes; the second type of codec is a codec of scrambling codes 4B5B, 8B10B, or 64B 66B.
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 distribution board 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 driving module and the decoding module; the transmitting card further 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.
In some embodiments, the sending card comprises a mother chip comprising the data processing module and the encoding module; the lamp panel further comprises a sub-chip, and the sub-chip comprises the driving module and the decoding module.
In some embodiments, the set number of lamp panels are cascade connected; the decoding module of the lamp panel is also used for extracting the 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.
In some embodiments, two adjacent lamp panels are electrically connected through the set type connecting line.
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-level lamp panel of the first-level display module acquires the coded video data required by all the display modules from the video processing unit; and the decoding module of the last-stage lamp panel in the display module is also 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-level lamp panel in each display module acquires the coded video data corresponding to the display module from the video processing unit.
In some embodiments, the video processing unit is further configured to set different identifiers for different lamp panels of the set number of lamp panels of the cascade connection of the same channel in a power-on initialization process.
In some embodiments, the routing card and the distribution board are in a one-to-one or one-to-many combination, or a hybrid one-to-one and one-to-many combination.
According to the splicing display system provided by the embodiment of the invention, the coding module is arranged on the video processing unit, the 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 the set coding and decoding protocol mode, and the coded video data can be transmitted to the lamp panel from the distributing plate through the connecting wires with the number of the contained wires less than the set type of the flat cables, so that the connecting wires containing fewer wires can be used for replacing the flat cables to connect the video processing unit and the lamp panel, the interface is simplified, and the stability of signal transmission is improved. Furthermore, through the decoding module and the drive module that set up on the lamp plate, can realize decoding and drive control of signal on the lamp plate, so, can transmit the video data of code between the cascaded lamp plate, rather than directly transmitting original video signal, so can avoid the signal weak problem of signal appearance in cascading transmission process, consequently, this scheme can further increase the quantity of cascading the lamp plate to can reduce the quantity of the connecting wire between break plate and the lamp plate. 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 addition, the video processing unit undertakes the video processing process, and the lamp panel only needs to decode, drive and display, so that modules on the lamp panel are simplified.
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 an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a tiled display system according to an 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 yet 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 another embodiment of the present 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 present invention, and as shown in fig. 2, the tiled display system according to some embodiments includes a video processing unit 100 and a set number of lamp panels 210, and the video processing unit 100 and the lamp panels 210 are electrically connected by a set type connection line. 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.
The video processing unit 100 includes a data acquisition module 101, a data processing module 102, and an encoding module 103. The data acquisition module 101 is configured to acquire video data; the data processing module 102 is configured to segment the acquired video data according to the position of each lamp panel 210 in the tiled display screen 200; the encoding module 103 is configured to encode the segmented video data according to a set encoding and decoding manner.
The set type connecting line can transmit video data coded according to the set coding and decoding mode. Video data, which may also be referred to as video signals, video image signals, etc., may refer to dynamic or static image signals or image data, including all data required for display at a corresponding location in a display screen. The video processing unit may receive video data transmitted from an external device, for example, a video source signal transmitted from a broadcast control device (e.g., a computer, a video processing device).
In particular implementations, the video processing unit may be implemented in one or more parts.
For example, as shown in FIG. 3, the video processing unit 100 may include a transmitter card 110 and a distribution board 120. The data processing module 102 may include a broadcast control end data processing module 112 and a receiving end data processing module 122. The sending card 110 may include the data acquisition module 101, the broadcast control end data processing module 112, and a data sending module 113; the broadcast control end data processing module 112 is configured to send and process the acquired video data; the data sending module 113 is configured to send the video data after sending processing to the distribution board 120. The distribution board 120 may include a data receiving module 121, the receiving-end data processing module 122, and the encoding module 103; the data receiving module 121 is configured to receive video data, and the receiving end data processing module 122 is configured to divide the video data according to the position of each lamp panel 210 in the tiled display screen. The data sending module 113 and the data receiving module 131 may both be network interface modules; the transmitting card 110 is used to transmit the captured video data to the distribution board 120 through network transmission.
The data collection module 101 may be implemented according to a data collection module in an existing transmission card. The broadcast control end data processing module 112 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 112 of this embodiment does not need to perform data splitting processing, because data splitting can be implemented in the distribution board 120. In addition, in the case that data is transmitted between the transmitting card 110 and the distributing board 120 according to a network transmission protocol, the data transmitting module 113 may be a network interface module, and the network interface module may include an existing network transmission chip, such as an ethernet PHY chip, which can implement a network protocol encoding function, and may further include a network transformer, etc. The data receiving module 121 and the data transmitting module 113 may be network interface modules, and the transmitting card 110 may transmit the collected video data to the distribution board 120 through network transmission, so that long-distance data transmission between the transmitting card 110 and the distribution board 120 may be achieved.
In the embodiment, the video processing unit is mainly realized by two parts, namely the sending card and the distribution board, and network transmission can be performed between the two sending cards and the distribution board, so that the embodiment can be suitable for application scenes needing long-distance transmission between the broadcasting control end and the display screen.
Wherein the receiving end data processing module 122 and the encoding module 103 may be disposed on the same chip. The distribution board 120 may further include a receiving terminal mother chip, which may include the receiving terminal data processing module 122 and the encoding module 103. Of course, other required modules can be arranged on the receiving end mother chip. The receiving end data processing module 122 can be implemented according to a data processing module in an existing receiving card, and the encoding module 103 can be implemented according to an existing module for encoding video data, so that a receiving end mother chip can implement a required module based on a general chip. In other embodiments it is not excluded that the receiving end data processing module 122 and the encoding module 103 may be provided on different chips. The receiving end mother chip may be an ASIC (application specific integrated circuit) chip.
The data acquisition module 101 and the broadcast control end data processing module 112 may be implemented on the same chip. For example, the transmitting card 110 may include a play control end mother chip, and the play control end mother chip may include the data acquisition module 101 and the play control end data processing module 112. 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 101 and the broadcast control end data processing module 112 are implemented on different chips. The broadcast control end mother chip can be an ASIC chip.
In addition, the sending card 110 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.
For another example, as shown in fig. 4, the video processing unit 100 may include a sending card, and the sending card may include the data acquisition module 101, the data processing module 102, and the encoding module 103. In the embodiment, the sending card can be used for realizing video processing functions such as data acquisition, data processing, encoding and the like, and the broadcast control end can realize all video processing functions by using the sending card, so that the structure of the board card is simplified. In this embodiment, send and connect through the connecting wire between card and the lamp plate, so can be applicable to the condition that does not need remote transmission, for example, trade shows and advertisement screen etc..
Further, the transmitting card may include a mother chip, and the mother chip may include the data processing module and the encoding module; the lamp panel may further include a sub-chip, and the sub-chip may include the driving module and the decoding module.
The embodiment shown in fig. 4 is mainly different from the embodiment shown in fig. 3 in that the video processing unit of the embodiment shown in fig. 3 is mainly implemented by a sending card and a distribution card, and the video processing unit of the embodiment shown in fig. 4 is mainly implemented by a sending card and a distribution card, and the application scenarios of the two are different.
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 data processing module (or the receiving end data processing module) can acquire not only video data, but also information such as lamp panel arrangement of a predetermined number of lamp panels, and can realize the division of the video data by utilizing a video data division mode or a similar mode 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 103, and then packed into one data packet, or may be divided into a plurality of data packets.
As further shown in fig. 2, the lamp panel 210 may include a decoding module 211 and a driving module 212. The decoding module 211 is configured to obtain encoded video data and decode the encoded video data according to the set encoding and decoding manner, and the driving module 212 is configured to convert the decoded video data into a physical signal so as to control the lamp bead 213 on the lamp panel 210 to display by using the physical signal.
The decoding module 211 and the driving module 212 may be disposed on the same chip. The lamp panel 210 may further include a sub-chip, which may include the driving module 212 and the decoding module 211. Of course, the sub-chip may also contain 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 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.
The decoding module 211 may obtain the video data encoded by the encoding module 103 from the video processing unit 100 through the above-mentioned set type connection line, and may decode the encoded video data to obtain various data (including video data itself and instruction data). 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 103 in the video processing unit 100, 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 video processing unit 100 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 video processing unit 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 video processing unit and the lamp panel can be realized by utilizing the set type connecting line comprising a few lines.
In addition, the data transmitted from the video processing unit 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.
In a further embodiment, 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.
Fig. 5 is a schematic structural diagram of a tiled display system according to another embodiment of the present invention. As shown in fig. 5, the lamp panels 210 in the set number may be connected in cascade; the decoding module 211 of the lamp panel 210 may also be configured to extract a video data packet required by the lamp panel from the encoded video data (data transmitted from the video processing unit), and transmit the remaining video data packets in the encoded video data to a next-stage lamp panel of the lamp panel 210. 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.
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.
In the case that there is lamp panel cascade in the display screen, the video processing unit 100 may be further configured to set different identifiers for different lamp panels of the set number of lamp panels 210 in cascade connection of the same channel in the power-on initialization process. Specifically, for example, after the system is powered on, the video processing unit may send an instruction of a certain transmission data format to a first-stage lamp panel in a certain cascade channel on the display screen, and the lamp panel may determine whether the transmission data is sent to itself according to check data in the transmission data, if so, may allocate certain data (e.g., 0), continue to transmit to a next stage, if data of the next-stage lamp panel, may allocate other data (e.g., 1), and so on, each next-stage transmission may allocate different data (e.g., continuously add 1), and may distinguish different lamp panels in the channel according to data allocated for different lamp panels. For example, different serial numbers can be set for different lamp panels of the same cascade channel, so that different lamp panels of the same cascade channel can be distinguished. The video processing unit can directly distinguish different cascade channels, so the same mark can be used between the lamp panels of different cascade channels, and all the lamp panels can be distinguished.
Further, as shown in fig. 6, in the tiled display system shown in fig. 5, 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 video processing unit to the display screen is encoded by the above-mentioned set codec, the data packets required at each lamp 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.
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. 7, the display screen 200 may include a plurality of display modules 220, and each of the display modules 220 may include the set number of lamp panels 210 (fig. 7 shows four lamp panels, which is only an example, 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-level lamp panel of the first-level display module acquires the coded video data required by all the display modules from the video processing unit 100; 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.
The first-stage display module may refer to a display module not connected with other display modules between the encoding module 103, the first-stage lamp panel in one display module may refer to a lamp panel on which data received by the display module arrives first, and the last-stage lamp panel in one display module may refer to a lamp panel on which required data is finally obtained in the display module.
For another example, as shown in fig. 8, 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. 8 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 110. 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 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 order to simplify the display system architecture, achieve low cost, ease of use, few connections, high stability, and the like, the present invention seeks to provide a tiled display system architecture. To simplify the external configuration of the system and to implement the functions of the existing display architecture, the inventor, after long-term research and comparison, breaks through the conventional thinking, considers that one part of the functions are placed in a sending end (distribution board), and simultaneously, the other part of the functions are implanted into a lamp panel of a 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 8, 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.
In one case, the sending card may send the original image to the distribution board, which sends the image to the unit board chip; in another case, the sending card sends the original image directly to the cell board chip, depending on the actual application, the traditional application is limited by the distance, the first scheme is adopted, and the second scheme is adopted for commercial display, advertisement screen and the like. Thus, 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 driving board receives the corresponding video data, the display data of the module corresponding to the driving board can be extracted, and a control signal is generated to display the display data. 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 encoding module is disposed on the video processing unit, the decoding module is disposed on the lamp panel, the encoding module and the decoding module encode and decode video data according to a set encoding and decoding protocol, and the encoded video data can be transmitted from the distribution board to the lamp panel through the connecting lines, the number of which is less than the set type of the flat cables, so that the connecting lines including fewer flat cables can be used to connect the video processing unit and the lamp panel instead of the flat cables, thereby simplifying the interface and improving the stability of signal transmission. Furthermore, through the decoding module and the drive module that set up on the lamp plate, can realize decoding and drive control of signal on the lamp plate, so, can transmit the video data of code between the cascaded lamp plate, rather than directly transmitting original video signal, so can avoid the signal weak problem of signal appearance in cascading transmission process, consequently, this scheme can further increase the quantity of cascading the lamp plate to can reduce the quantity of the connecting wire between break plate and the lamp plate. 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 addition, the video processing unit undertakes the video processing process, and the lamp panel only needs to decode, drive and display, so that modules on the lamp panel are 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 a video processing unit and a set number of lamp panels, wherein the video processing unit is electrically connected with the lamp panels 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 video processing unit comprises a data acquisition module, a data processing module and a coding module; the data acquisition module is used for acquiring video data; the data processing module is used for dividing the collected video data according to the positions of the lamp panels in the spliced display screen; the coding module is used for coding the segmented video data according to a set coding and decoding mode; the set type connecting line can transmit video data coded according to the set coding and decoding mode;
the lamp panel comprises a decoding module and a driving module; the decoding module is used for acquiring coded video data and decoding the coded video data according to the set coding and decoding mode, and the driving module is used for converting the decoded video data into physical signals and controlling the lamp beads on the lamp panel to display by utilizing the physical signals.
2. The tiled display system of claim 1 wherein the video processing unit includes a sending card and a distribution board; the data processing module comprises a broadcast control end data processing module and a receiving end data processing module;
the transmitting card comprises the data acquisition module, the broadcast control end data processing module and a data transmitting module; the broadcast control end data processing module is used for sending and processing the acquired video data; the data sending module is used for sending the video data after sending processing to the distribution board;
the distribution board comprises a data receiving module, the receiving end data processing module and the coding module; the data receiving module is used for receiving video data, and 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;
the data sending module and the data receiving module are both network interface modules; the transmitting card is used for transmitting the collected video data to the distributing board through network transmission.
3. The tiled display system of claim 1 wherein the video processing unit comprises a transmitter card; the sending card comprises the data acquisition module, the data processing module and the coding module.
4. The tiled display system according to any of the claims 1 to 3, wherein the set codec mode comprises 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.
5. The tiled display system of claim 4, 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.
6. The tiled display system of claim 1, wherein the set number of lamp panels are cascade connected; the decoding module of the lamp panel is also used for extracting the 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.
7. The tiled display system of claim 6, 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-level lamp panel of the first-level display module acquires the coded video data required by all the display modules from the video processing unit; and the decoding module of the last-stage lamp panel in the display module is also 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.
8. The tiled display system of claim 6,
the system comprises a plurality of display modules, and each display module comprises the lamp panels with the set number; the first-level lamp panel in each display module acquires coded video data corresponding to the display module from the video processing unit; and/or
And the adjacent two stages of lamp panels are electrically connected through the set type connecting wire.
9. The tiled display system of any of claims 6 to 8, wherein the video processing unit is further configured to set different flags for different lamp panels of the set number of lamp panels of the cascade connection of the same channel during power-on initialization.
10. A tiled display system according to claim 2 wherein the sending card and the distribution board are in one-to-one or one-to-many combination, or a hybrid one-to-one and one-to-many combination.
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