CN114255670B - LED display screen and spliced display screen - Google Patents
LED display screen and spliced display screen Download PDFInfo
- Publication number
- CN114255670B CN114255670B CN202111554472.8A CN202111554472A CN114255670B CN 114255670 B CN114255670 B CN 114255670B CN 202111554472 A CN202111554472 A CN 202111554472A CN 114255670 B CN114255670 B CN 114255670B
- Authority
- CN
- China
- Prior art keywords
- display screen
- control data
- led display
- board card
- type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008054 signal transmission Effects 0.000 abstract description 13
- 230000006870 function Effects 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- 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
- H04N5/2624—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 for obtaining an image which is composed of whole input images, e.g. splitscreen
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the application provides an LED display screen and a spliced display screen, the second type of board card integrates the functions of a control board card and a display board card, only an external information source access port is reserved, the integration degree of the LED display screen is improved, and physical connection lines are reduced; in addition, the boards are connected in series, wiring is simple, differential signals are transmitted between the boards by utilizing differential links, wiring complexity is reduced, a signal transmission mode is optimized, anti-interference capability of signals is high, and signal transmission has lower complexity.
Description
Technical Field
The application relates to the technical field of image processing, in particular to an LED display screen and a spliced display screen.
Background
At present, the industry of LEDs (Light Emitting Diode, light emitting diodes) generally adopts a network physical layer link to implement data interaction, for example, an LED display screen includes four display boards, for example, as shown in fig. 1, the LED display screen includes a control board card and four display boards, the control board card is connected with the four display boards respectively, so that wiring in the LED display screen is complex, and the control board card needs to send data to the four display boards respectively, thereby resulting in complex signal transmission.
Disclosure of Invention
An object of the embodiment of the application is to provide an LED display screen and a spliced display screen, so as to reduce the complexity of wiring in the LED display screen, thereby reducing the complexity of signal transmission. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present application provides an LED display screen, including:
the system comprises a plurality of boards and a plurality of control units, wherein the plurality of boards comprise a second type of boards and at least two first types of boards, and the plurality of boards are connected in series through differential links;
the second type board card is used for receiving first image data and first control data which are input from the outside of the LED display screen; determining second control data according to the first control data and the first image data, wherein the second control data represents image areas displayed by all the board cards; transmitting the first image data to the first type of self-connected board card in a differential signal mode by utilizing a differential link, and transmitting the second control data to the first type of self-connected board card; displaying an image area in the first image data based on the first image data and the second control data;
the first type board card is used for receiving the first image data and the second control data which are transmitted in differential signals through a differential link; under the condition that the rear end of the first type of board card is connected with the self-body rear end, the first image data is transmitted to the first type of board card at the self-body rear end in a differential signal mode by utilizing a differential link, and the second control data is transmitted to the first type of board card at the self-body rear end, wherein the rear end of the first type of board card is one end, far away from the second type of board card, of the board card serial link aiming at any first type of board card; and displaying an image area in the first image data based on the first image data and the second control data.
In one possible embodiment, the second type of plate-card is specifically for: respectively determining an image area of each board card for displaying the first image data according to the display position information of each predetermined board card in the LED display screen; and generating second control data according to the image area of the first image data and the first control data displayed by each board card.
In one possible implementation, the second control data includes first control data and flag bit data;
the second type plate fixture is specifically used for: and adding bit zone data into the frame header of the data frame of the first image data according to the image area of the first image data displayed by each board card, wherein the bit zone data in each data frame represents the board card displaying the image area corresponding to the data frame.
In one possible embodiment, the second type of plate-card is specifically for: acquiring an image area to be displayed in the first image data based on the second control data to obtain a first image area; adjusting the resolution of the first image area to the display resolution of the first image area to obtain a second image area; storing the second image area in a buffer area, and playing the second image area in the buffer area when the playing time represented by the second control data is reached;
the first type of board clamp is used for: acquiring an image area to be displayed in the first image data based on the second control data to obtain a third image area; adjusting the resolution of the third image area to the display resolution of the third image area to obtain a fourth image area; and storing the fourth image area in a buffer area, and playing the fourth image area in the buffer area when the playing time indicated by the second control data is reached.
In one possible implementation, the first type of board card is further configured to: acquiring own state parameters, and transmitting the own state parameters to the boards connected with the front ends of the boards in a differential signal mode by utilizing a differential link, wherein the front ends of the boards of any first type are one ends, close to the boards of the second type, of the serial link of the boards; after receiving the state parameters of other first-class boards, transmitting the state parameters of the other first-class boards to the boards connected with the front ends of the boards by using a differential link in a differential signal mode.
In one possible implementation, the second type of board includes a video input interface, a video output interface, a control data input interface, and a control data output interface.
In a possible implementation manner, the video input interface comprises a high-definition video input interface and/or an ultra-high-definition video input interface, the video output interface comprises a high-definition video output interface and/or an ultra-high-definition video output interface, the control data input interface comprises an ethernet input interface, and the control data output interface comprises an ethernet output interface.
In a second aspect, an embodiment of the present application provides a tiled display screen, including: the display screen splicing unit comprises a plurality of LED display screens, wherein each LED display screen in the same display screen splicing unit is connected in series.
In a possible implementation manner, in a case that the second type of board card includes a video input interface, a video output interface, a control data input interface, and a control data output interface:
a first LED display screen in the same display screen splicing unit receives second image data input from the outside of the display screen splicing unit through a video input interface, receives third control data input from the outside of the display screen splicing unit through a control data input interface, sends the second image data to a second LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the second LED display screen in the display screen splicing unit through a control data output interface;
the ith LED display screen in the display screen splicing unit receives the second image data sent by the ith-1 LED display screen in the display screen splicing unit through a video input interface, receives the ith-1 LED display screen in the display screen splicing unit through a control data input interface and sends the third control data, sends the second image data to the (i+1) th LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the (i+1) th LED display screen in the display screen splicing unit through a control data output interface, wherein i is more than 1 and less than N, i is an integer, and N is the total number of LED display screens in the single display screen splicing unit;
the N-th LED display screen in the display screen splicing unit receives the second image data sent by the N-1 th LED display screen in the display screen splicing unit through a video input interface, and receives the N-1 th LED display screen in the display screen splicing unit through a control data input interface to send the third control data.
In one possible implementation, in case the tiled display screen includes a plurality of display screen stitching units:
a first LED display screen in each display screen splicing unit respectively receives image data input from the outside of the spliced display screen;
a first LED display screen in a first display screen splicing unit receives third control data input from the outside of the spliced display screen, and an N-th LED display screen in the first display screen splicing unit sends the third control data to a first LED display screen in a second display screen splicing unit; a first LED display screen in the j-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the j-1-th display screen splicing unit, and the N-th LED display screen in the j-th display screen splicing unit sends the third control data to the first LED display screen in the j+1-th display screen splicing unit; and the first LED display screen in the Y-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the Y-1-th display screen splicing unit, wherein j is more than 1 and less than Y, j is an integer, and Y is the total number of display screen splicing units in the spliced display screens.
The beneficial effects of the embodiment of the application are that:
the embodiment of the application provides an LED display screen and concatenation display screen, LED display screen includes: the plurality of boards comprise a second type of boards and at least two first type of boards, and the plurality of boards are connected in series through differential links; the second type of board card is used for receiving first image data and first control data which are input from the outside of the LED display screen; determining second control data according to the first control data and the first image data, wherein the second control data represents image areas displayed by all the board cards; transmitting the first image data to the first type of self-connected board card in a differential signal mode by utilizing a differential link, and transmitting the second control data to the first type of self-connected board card; displaying an image area in the first image data based on the first image data and the second control data; the first type of board card is used for receiving first image data and second control data transmitted in differential signals through a differential link; under the condition that the rear end of the first type of board card is connected with the self-body rear end, transmitting first image data to the first type of board card of the self-body rear end in a differential signal mode by utilizing a differential link, and transmitting second control data to the first type of board card of the self-body rear end, wherein the rear end of the first type of board card is one end, far away from the second type of board card, of a board card serial link aiming at any first type of board card; an image area in the first image data is displayed based on the first image data and the second control data. The second type of board card comprises the functions of a control board card and a display board card, and only an external information source access port is reserved, so that the integration degree of the LED display screen is improved, and the physical connection is reduced; in addition, differential signals are transmitted among the boards by utilizing differential links, so that the wiring complexity is reduced, the signal transmission mode is optimized, the anti-interference capability of signals is high, and the signal transmission has lower complexity. Of course, not all of the above-described advantages need be achieved simultaneously in practicing any one of the products or methods of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a board card wiring in an LED display screen according to the related art;
FIG. 2 is a first schematic view of an LED display screen according to an embodiment of the present application;
FIG. 3 is a second schematic view of an LED display screen according to an embodiment of the present application;
FIG. 4 is a schematic view of an image area of an LED display screen according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a display screen splicing unit according to an embodiment of the present application;
fig. 6 is a schematic diagram of a tiled display screen according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, a person of ordinary skill in the art would be able to obtain all other embodiments based on the disclosure herein, which are within the scope of the disclosure herein.
In order to reduce the complexity of wiring in an LED display screen, thereby reducing the complexity of signal transmission, an embodiment of the present application provides an LED display screen, see fig. 2, including:
the system comprises a plurality of boards, a plurality of control units and a plurality of control units, wherein the plurality of boards comprise a second type of board 12 and at least two first type of boards 11, and the plurality of boards are connected in series through differential links;
the second type board 12 is configured to receive first image data and first control data input from the LED display screen; determining second control data according to the first control data and the first image data, wherein the second control data represents image areas displayed by all the board cards; transmitting the first image data to the first type of self-connected board card in a differential signal mode by utilizing a differential link, and transmitting the second control data to the first type of self-connected board card; displaying an image area in the first image data based on the first image data and the second control data;
the first type board 11 is configured to receive the first image data and the second control data transmitted in differential signals through a differential link; under the condition that the rear end of the first type of board card is connected with the self-body rear end, the first image data is transmitted to the first type of board card at the self-body rear end in a differential signal mode by utilizing a differential link, and the second control data is transmitted to the first type of board card at the self-body rear end, wherein the rear end of the first type of board card is one end, far away from the second type of board card, of the board card serial link aiming at any first type of board card; and displaying an image area in the first image data based on the first image data and the second control data.
The boards in the LED display screen are connected in series through differential links, different boards correspond to different display areas, and the areas of the display areas of the boards can be the same or different. The differential signals used by the differential link may be customized according to the actual situation, and may be set as LVDS (Low Voltage Differential Signaling, low voltage differential signal), MIPI (Mobile Industry Processor Interface ) differential signals, CML (Current Mode Logic, current mode roadbed) differential signals, and the like.
The first image data is the image data which needs to be displayed by the LED display screen. The second type of board card receives first image data and first control data which are input from the outside of the LED display screen, wherein the first control data comprise playing parameters of the first image data, such as a frame number, a frame header, a refreshing command, display data and the like of the first image data, the refreshing command indicates that only when the command is received, the board card can display an image area, and the image area can be cached in a memory of the board card before the refreshing command is not received. The second type of board card integrates a control function in addition to displaying the image area, for controlling the image area in the image data displayed by each board card. In one possible embodiment, the second type of plate-card is specifically for: respectively determining an image area of each board card for displaying the first image data according to the display position information of each predetermined board card in the LED display screen; and generating second control data according to the image area of the first image data and the first control data displayed by each board card. The second control data represents an image area displayed by each board card, and in addition, the second control data may further include a playing parameter of the first image data in the first control data. In one example, the second control data may include coordinates of each image area displayed by each board, for example, the first type board B displays image areas (a 1, B1) - (a 2, B2), where (a 1, B1) - (a 2, B2) represents a rectangular image area with coordinates of an upper left corner pixel being (a 1, B1) and coordinates of a lower right corner pixel being (a 2, B2).
In one possible implementation, the second control data includes first control data and flag bit data; the second type plate fixture is specifically used for: and adding bit zone data into the frame header of the data frame of the first image data according to the image area of the first image data displayed by each board card, wherein the bit zone data in each data frame represents the board card displaying the image area corresponding to the data frame.
The first image data is transmitted in the form of data frames among the boards, the first image data is required to be split into a plurality of data segments with specified lengths, for each data segment, a frame head is required to be added in front of the data segment, and a frame tail is required to be added behind the data segment, so that the data frames are obtained. In the embodiment of the application, the flag bit data is added in the frame header of the data frame according to the image area where the first image data is displayed by each board card. For example, if the board a displays the image area a, the flag bit data in the frame header of the data frame generated by the data in the image area a indicates the board a.
In one possible embodiment, the second type of plate-card is specifically for: acquiring an image area to be displayed in the first image data based on the second control data to obtain a first image area; adjusting the resolution of the first image area to the display resolution of the first image area to obtain a second image area; storing the second image area in a buffer area, and playing the second image area in the buffer area when the playing time represented by the second control data is reached; the first type of board clamp is used for: acquiring an image area to be displayed in the first image data based on the second control data to obtain a third image area; adjusting the resolution of the third image area to the display resolution of the third image area to obtain a fourth image area; and storing the fourth image area in a buffer area, and playing the fourth image area in the buffer area when the playing time indicated by the second control data is reached.
In one example, taking an LED display screen including four boards as an example, as shown in fig. 3 and fig. 4, the LED display screen includes a second type board and three first type boards, the areas of the display areas of the boards are the same, the second type board is connected in series with a first type board a, the first type board a is connected in series with a first type board b, the first type board b is connected in series with a first type board c, and a board serial link is formed, and then the rear end of the first type board a is the first type board b. Taking the resolution of the image data as axb as an example, the second control data represents an image area 4 of the second type of board card displaying the image data of lower right corner (a/2) × (B/2), an image area 2 of the first type of board card a displaying the image data of upper right corner (a/2) × (B/2), an image area 1 of the first type of board card B displaying the image data of upper left corner (a/2) × (B/2), and an image area 3 of the first type of board card c displaying the image data of lower left corner (a/2) × (B/2).
In one example, the first image data is transmitted between the boards in the form of data frames, and for each data frame, the flag bit data in the data frame represents the board displaying the image area corresponding to the data frame. The first type board card can acquire an image area which needs to be displayed according to the zone bit data in the frame head of the data frame.
The first type of board card is responsible for LED screen driving of a certain area and is used for displaying a designated image area in the first image data based on the second control data and the first image data. In one example, the first type of board card includes an FPGA (Field-Programmable Gate Array, field programmable gate array) unit or the like, and the FPGA unit converts an image data signal into an RGB signal required for a panel display screen, a control signal of a row tube chip and a column tube chip, a FLASH signal required for a panel, and the like, and the panel includes FLASH for storing attribute information and correction data of the panel, and the like.
In one example, the second type of board card comprises a main control unit, an FPGA unit, a video conversion unit and a network conversion unit; the main control unit is used for controlling the LED display screen and comprises the generation of second control data; the FPGA unit in the second type of board card can be used for inputting HDMI signals, generating and sending control signals of the LED lamp panel in the display area of the FPGA unit, and the like; the video conversion unit is used for copying the accessed first video data to obtain two paths of video data, wherein one path of video data is used for displaying the LED display screen where the video conversion unit is located, and the other path of video data is transmitted to the second type of board cards of the other LED display screens; the network conversion unit is used for copying the accessed first control data to obtain two paths of first control data, wherein one path is used for controlling the LED display screen where the network conversion unit is located, and the other path is transmitted to the second type of board cards of other LED display screens.
In the embodiment of the application, the second type of board card comprises the functions of the control board card and the display board card, and only the external information source access port is reserved, so that the integration degree of the LED display screen is improved, and the physical connection line is reduced; in addition, differential signals are transmitted among the boards by utilizing differential links, so that the wiring complexity is reduced, the signal transmission mode is optimized, the anti-interference capability of signals is high, and the signal transmission has lower complexity.
The second type of board card can transmit second control data to the first type of board card connected with the second type of board card by using an Ethernet link, and the first type of board card can transmit the second control data to the first type of board card connected with the back end of the first type of board card by using the Ethernet link under the condition that the back end of the first type of board card is connected with the first type of board card. But the transmission manner of the ethernet increases the complexity of the link, and in order to further reduce the complexity of the link, in one possible implementation, the second board-type card is specifically configured to: transmitting the second control data to the first type of board card connected with the second type of board card by using a differential link in a differential signal mode;
the first type of board clamp is used for: and under the condition that the back end of the first type of board card is connected, transmitting the second control data to the first type of board card connected with the back end of the first type of board card by utilizing a differential link in a differential signal mode.
In one example, taking a differential link as an LVDS cable as an example, the bandwidth of one LVDS cable can reach 1.92Gbps, and for a conventional LED lamp panel with a center-to-center spacing of 1.2mm and a resolution of 480 x 270, the carrying capacity of the LED lamp panel can reach 10, and compared with the conventional network cable transmission mode, the differential link has a higher bandwidth and a larger carrying quantity. If the video with 2K resolution is transmitted, the required bandwidth is 3.56Gbps, and the transmission bandwidth requirement can be met by 2 pairs of LVDS Lanes; if the video with 4K resolution is transmitted, the required bandwidth is 14.25Gbps, 8 pairs of LVDS Lane are needed to meet the transmission bandwidth requirement.
In the embodiment of the application, between the boards in the LED display screen, the image data and the control data are transmitted in the form of differential signals through the differential links, and other links outside the differential links are not required to be arranged between the boards, so that the wiring complexity is greatly reduced, and the signal transmission mode is optimized.
In one possible implementation, the first type of board card is further configured to: acquiring own state parameters, and transmitting the own state parameters to the boards connected with the front ends of the boards in a differential signal mode by utilizing a differential link, wherein the front ends of the boards of any first type are one ends, close to the boards of the second type, of the serial link of the boards; after receiving the state parameters of other first-class boards, transmitting the state parameters of the other first-class boards to the boards connected with the front ends of the boards by using a differential link in a differential signal mode.
In one example, the status parameters of the board card may include a temperature parameter, a voltage parameter, a humidity parameter, and a parameter indicating whether the board card software is stably and normally operating. In the embodiment of the application, besides the image data and the control signals, the differential circuit can also transmit the state parameters of the boards, and other links besides the differential link are not required to be arranged among the boards, so that the complexity of wiring is greatly reduced, and the signal transmission mode is optimized.
In one possible implementation, the second type of board includes a video input interface, a video output interface, a control data input interface, and a control data output interface. The second type of board card can receive first image data input from the outside of the LED display screen through the video input interface and first control data input from the outside of the LED display screen through the control data input interface; the video output interface of the second type of board card is used for outputting first image data to other LED display screens, and the control data output interface of the second type of board card is used for outputting first control data to other LED display screens.
In a possible implementation manner, the video input interface comprises a high-definition video input interface and/or an ultra-high-definition video input interface, the video output interface comprises a high-definition video output interface and/or an ultra-high-definition video output interface, the control data input interface comprises an ethernet input interface, and the control data output interface comprises an ethernet output interface. In one example, for example, as shown in fig. 3, in the second type of board card, from left to right, the ultra-high-definition input interface, the ultra-high-definition output interface, the high-definition input interface, the high-definition output interface, the ethernet input interface, the ethernet output interface, the USB interface, and the serial port are sequentially provided. The ultra-high definition input interface can be an HDBaseT IN interface, the ultra-high definition input interface can be an HDBaseT Out interface, the high definition input interface can be an HDMI IN interface, the high definition output interface can be an HDMI OUT interface, the Ethernet input interface can be an RJ45 interface, and the Ethernet output interface can be an RJ45 interface.
The HDMI IN is a video input port of a currently mainstream video transmission mode, and is responsible for processing an HDMI signal accessed to the second type board card into a signal required for displaying a corresponding area through an HDMI conversion chip, specifically, the HDMI chip is connected to an FPGA, and the HDMI signal is converted into a signal required by the LED board by the FPGA. HDMI OUT is a high-definition multimedia signal output interface, can output a video source with 4K resolution at the highest, and is responsible for transmitting HDMI signals input in an LED display screen to the next-stage LED display screen without damage. HDBaseT IN: the video input signal network port is accessed into the HDMI video signal through the transmission mode of the HDBaseT network port, so that the theoretical transmission distance can reach one hundred meters for coping with the video transmission scene under the long-distance condition, and the data transmission under the 4K resolution can be supported at most. HDBaseT OUT: the video loops out of the signal network port, and the HDMI video signal is output through the transmission mode of the HDBaseT, so that the HDMI signal is converted into a mode of long-distance transmission through the network port. RJ45: the control network port cascade is used for communication among the LED display screens in the spliced display screen, screen parameter debugging configuration, LED screen correction data transmission, base map transmission control and the like. The USB interface and the serial port can be used for inputting and outputting image data and/or control data.
In the embodiment of the application, the second type of board card comprises a video input interface, a video output interface, a control data input interface and a control data output interface, so that the splicing function of the LED display screen can be realized.
The embodiment of the application also provides a spliced display screen, which is characterized by comprising: the display screen splicing unit comprises a plurality of LED display screens, wherein each LED display screen in the same display screen splicing unit is connected in series. Each LED display screen in the same display screen splicing unit is connected in series, different LED display screens correspond to different display areas, and the areas of the display areas of the LED display screens can be the same or different.
Image data and control signals are required to be transmitted among all LED display screens in the same display screen splicing unit. In a possible implementation manner, in a case that the second type of board card includes a video input interface, a video output interface, a control data input interface, and a control data output interface:
a first LED display screen in the same display screen splicing unit receives second image data input from the outside of the display screen splicing unit through a video input interface, receives third control data input from the outside of the display screen splicing unit through a control data input interface, sends the second image data to a second LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the second LED display screen in the display screen splicing unit through a control data output interface;
the ith LED display screen in the display screen splicing unit receives the second image data sent by the ith-1 LED display screen in the display screen splicing unit through a video input interface, receives the ith-1 LED display screen in the display screen splicing unit through a control data input interface and sends the third control data, sends the second image data to the (i+1) th LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the (i+1) th LED display screen in the display screen splicing unit through a control data output interface, wherein i is more than 1 and less than N, i is an integer, and N is the total number of LED display screens in the single display screen splicing unit;
the N-th LED display screen in the display screen splicing unit receives the second image data sent by the N-1 th LED display screen in the display screen splicing unit through a video input interface, and receives the N-1 th LED display screen in the display screen splicing unit through a control data input interface to send the third control data.
In one example, referring to fig. 5, a display screen splicing unit includes four LED display screens, where the four LED display screens are spliced into a rectangle.
In some scenes, the resolution ratio of the spliced display screen is larger, and a plurality of display screen splicing units are required to splice so as to meet the resolution ratio requirement of the spliced display screen. Taking the resolution of the spliced display screen as c×d (row resolution×column resolution), the resolution of the display screen splicing unit as b×a as an example, if C/b and D/a can be divided, the number of spliced screens required is:
if one of the C/b or the D/a can not be divided, the number of the spliced screens needed is C/b or D/a, which are multiplied after being rounded and added by 1.
Wherein [ (i) represents the whole symbol).
Taking an example of an LED box with a single pixel center distance of 1.2mm, the resolution is generally 480 x 270[ row resolution x column resolution ],4 such LED boxes can form 1 spliced screen with 960 x 540[ row resolution x column resolution ] resolution, and 4 such spliced screens can form a display area with 1920 x 1080[ row resolution x column resolution ] resolution.
In one possible implementation, in case the tiled display screen includes a plurality of display screen stitching units:
a first LED display screen in each display screen splicing unit respectively receives image data input from the outside of the spliced display screen;
a first LED display screen in a first display screen splicing unit receives third control data input from the outside of the spliced display screen, and an N-th LED display screen in the first display screen splicing unit sends the third control data to a first LED display screen in a second display screen splicing unit; a first LED display screen in the j-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the j-1-th display screen splicing unit, and the N-th LED display screen in the j-th display screen splicing unit sends the third control data to the first LED display screen in the j+1-th display screen splicing unit; and the first LED display screen in the Y-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the Y-1-th display screen splicing unit, wherein j is more than 1 and less than Y, j is an integer, and Y is the total number of display screen splicing units in the spliced display screens.
In other possible embodiments, the third control data between the multiple display screen splicing units in the spliced display screen may also be transmitted transversely or longitudinally according to the rows or columns of the LED display screens, for example, as shown in fig. 6, where the spliced display screen includes 6 display screen splicing units, each display screen splicing unit is a rectangular unit formed by splicing 4 LED display screens, and the control data between the display screen splicing units is routed transversely according to the rows of the LED display screens.
The spliced display screen in the embodiment of the application is suitable for a scene without cutting a display picture, can be displayed point to point, ensures the pixel rate of the upper left corner input image, discards redundant pixels or blackens insufficient pixels. The spliced display screen also supports the zooming function of the image, if the range resolution of the image to be displayed is MxN and the resolution of the spliced display screen is ExF, the range resolution of the image to be displayed can be zoomed into ExF through an image algorithm, and then the image is displayed on the spliced display screen. The second type of board card in each LED display screen can be used for realizing the splicing function of the LED display screen, wiring is simple, a signal transmission mode is optimized, and the complexity of wiring is reduced, so that the complexity of signal transmission is reduced.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
It should be noted that, in this document, the technical features in each alternative may be combined to form a solution, so long as they are not contradictory, and all such solutions are within the scope of the disclosure of the present application. Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and each embodiment is mainly described in a different manner from other embodiments, so that identical and similar parts between the embodiments are referred to each other.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. that are within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (9)
1. An LED display screen, comprising:
the system comprises a plurality of boards and a plurality of control units, wherein the plurality of boards comprise a second type of boards and at least two first types of boards, and the plurality of boards are connected in series through differential links;
the second type board card is used for receiving first image data and first control data which are input from the outside of the LED display screen; respectively determining an image area of each board card for displaying the first image data according to the display position information of each predetermined board card in the LED display screen; generating second control data according to the image area of the first image data and the first control data displayed by each board card, wherein the first control data comprises playing parameters of the first image data, and the second control data represents the image area displayed by each board card; transmitting the first image data to the first type of self-connected board card in a differential signal mode by utilizing a differential link, and transmitting the second control data to the first type of self-connected board card; displaying an image area in the first image data based on the first image data and the second control data;
the first type board card is used for receiving the first image data and the second control data which are transmitted in differential signals through a differential link; under the condition that the rear end of the first type of board card is connected with the self-body rear end, the first image data is transmitted to the first type of board card at the self-body rear end in a differential signal mode by utilizing a differential link, and the second control data is transmitted to the first type of board card at the self-body rear end, wherein the rear end of the first type of board card is one end, far away from the second type of board card, of the board card serial link aiming at any first type of board card; and displaying an image area in the first image data based on the first image data and the second control data.
2. The LED display screen of claim 1, wherein the second control data comprises first control data and flag bit data;
the second type plate fixture is specifically used for: and adding bit zone data into the frame header of the data frame of the first image data according to the image area of the first image data displayed by each board card, wherein the bit zone data in each data frame represents the board card displaying the image area corresponding to the data frame.
3. The LED display screen of claim 1, wherein the second type of board fixture is specifically configured to: acquiring an image area to be displayed in the first image data based on the second control data to obtain a first image area; adjusting the resolution of the first image area to the display resolution of the first image area to obtain a second image area; storing the second image area in a buffer area, and playing the second image area in the buffer area when the playing time represented by the second control data is reached;
the first type of board clamp is used for: acquiring an image area to be displayed in the first image data based on the second control data to obtain a third image area; adjusting the resolution of the third image area to the display resolution of the third image area to obtain a fourth image area; and storing the fourth image area in a buffer area, and playing the fourth image area in the buffer area when the playing time indicated by the second control data is reached.
4. The LED display screen of claim 1, wherein the first type of board card is further configured to: acquiring own state parameters, and transmitting the own state parameters to the boards connected with the front ends of the boards in a differential signal mode by utilizing a differential link, wherein the front ends of the boards of any first type are one ends, close to the boards of the second type, of the serial link of the boards; after receiving the state parameters of other first-class boards, transmitting the state parameters of the other first-class boards to the boards connected with the front ends of the boards by using a differential link in a differential signal mode.
5. The LED display screen of claim 1, wherein the second type of board card comprises a video input interface, a video output interface, a control data input interface, a control data output interface.
6. The LED display screen of claim 5, wherein the video input interface comprises a high definition video input interface and/or an ultra high definition video input interface, the video output interface comprises a high definition video output interface and/or an ultra high definition video output interface, the control data input interface comprises an ethernet input interface, and the control data output interface comprises an ethernet output interface.
7. A tiled display screen, comprising: at least one display screen splicing unit, wherein the display screen splicing unit comprises a plurality of LED display screens according to any one of claims 1 to 6, and the LED display screens in the same display screen splicing unit are connected in series.
8. The tiled display screen according to claim 7, wherein in case the second type of board card comprises a video input interface, a video output interface, a control data input interface, a control data output interface:
a first LED display screen in the same display screen splicing unit receives second image data input from the outside of the display screen splicing unit through a video input interface, receives third control data input from the outside of the display screen splicing unit through a control data input interface, sends the second image data to a second LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the second LED display screen in the display screen splicing unit through a control data output interface;
the ith LED display screen in the display screen splicing unit receives the second image data sent by the ith-1 LED display screen in the display screen splicing unit through a video input interface, receives the ith-1 LED display screen in the display screen splicing unit through a control data input interface and sends the third control data, sends the second image data to the (i+1) th LED display screen in the display screen splicing unit through a video output interface, and sends the third control data to the (i+1) th LED display screen in the display screen splicing unit through a control data output interface, wherein i is more than 1 and less than N, i is an integer, and N is the total number of LED display screens in the single display screen splicing unit;
the N-th LED display screen in the display screen splicing unit receives the second image data sent by the N-1 th LED display screen in the display screen splicing unit through a video input interface, and receives the N-1 th LED display screen in the display screen splicing unit through a control data input interface to send the third control data.
9. The tiled display screen according to claim 8, wherein in case the tiled display screen includes a plurality of display stitching units:
a first LED display screen in each display screen splicing unit respectively receives image data input from the outside of the spliced display screen;
a first LED display screen in a first display screen splicing unit receives third control data input from the outside of the spliced display screen, and an N-th LED display screen in the first display screen splicing unit sends the third control data to a first LED display screen in a second display screen splicing unit; a first LED display screen in the j-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the j-1-th display screen splicing unit, and the N-th LED display screen in the j-th display screen splicing unit sends the third control data to the first LED display screen in the j+1-th display screen splicing unit; and the first LED display screen in the Y-th display screen splicing unit receives the third control data sent by the N-th LED display screen in the Y-1-th display screen splicing unit, wherein j is more than 1 and less than Y, j is an integer, and Y is the total number of display screen splicing units in the spliced display screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554472.8A CN114255670B (en) | 2021-12-17 | 2021-12-17 | LED display screen and spliced display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554472.8A CN114255670B (en) | 2021-12-17 | 2021-12-17 | LED display screen and spliced display screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114255670A CN114255670A (en) | 2022-03-29 |
| CN114255670B true CN114255670B (en) | 2024-01-02 |
Family
ID=80792861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111554472.8A Active CN114255670B (en) | 2021-12-17 | 2021-12-17 | LED display screen and spliced display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114255670B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115985201A (en) * | 2023-01-09 | 2023-04-18 | 深圳市灰度科技有限公司 | LED automatic splicing screen and cascading method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080001805A (en) * | 2006-06-30 | 2008-01-04 | 엘지.필립스 엘시디 주식회사 | Display device |
| CN102034432A (en) * | 2010-12-15 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Light-emitting diode (LED) display screen signal cascade system |
| CN102123247A (en) * | 2010-12-31 | 2011-07-13 | Tcl新技术（惠州）有限公司 | Loop-connection system for splicing unit and implementation method thereof |
| CN104202545A (en) * | 2014-09-19 | 2014-12-10 | 利亚德光电股份有限公司 | Mosaic display system, LED liquid crystal display and television set |
| CN104410857A (en) * | 2014-12-26 | 2015-03-11 | 广东威创视讯科技股份有限公司 | Image display control method and related device |
| CN108682384A (en) * | 2018-06-28 | 2018-10-19 | 东莞阿尔泰显示技术有限公司 | A kind of LED display control system and its control method |
| CN110073666A (en) * | 2016-12-14 | 2019-07-30 | 三星电子株式会社 | Configure the display device of multi-display system and the method for controlling it |
| CN110633063A (en) * | 2019-09-23 | 2019-12-31 | 东莞阿尔泰显示技术有限公司 | Control framework of all-in-one LED display screen |
| CN111510643A (en) * | 2019-01-31 | 2020-08-07 | 杭州海康威视数字技术股份有限公司 | System and method for splicing panoramic image and close-up image |
| CN211956055U (en) * | 2020-04-22 | 2020-11-17 | 广州视源电子科技股份有限公司 | Splicing type liquid crystal display screen |
| CN112825224A (en) * | 2019-11-20 | 2021-05-21 | 西安诺瓦星云科技股份有限公司 | LED display screen |
| WO2021237434A1 (en) * | 2020-05-26 | 2021-12-02 | 西安诺瓦星云科技股份有限公司 | Display screen configuration method, apparatus and system, and computer-readable storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10593256B2 (en) * | 2018-03-22 | 2020-03-17 | Sct Ltd. | LED display device and method for operating the same |
-
2021
- 2021-12-17 CN CN202111554472.8A patent/CN114255670B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080001805A (en) * | 2006-06-30 | 2008-01-04 | 엘지.필립스 엘시디 주식회사 | Display device |
| CN102034432A (en) * | 2010-12-15 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Light-emitting diode (LED) display screen signal cascade system |
| CN102123247A (en) * | 2010-12-31 | 2011-07-13 | Tcl新技术（惠州）有限公司 | Loop-connection system for splicing unit and implementation method thereof |
| CN104202545A (en) * | 2014-09-19 | 2014-12-10 | 利亚德光电股份有限公司 | Mosaic display system, LED liquid crystal display and television set |
| CN104410857A (en) * | 2014-12-26 | 2015-03-11 | 广东威创视讯科技股份有限公司 | Image display control method and related device |
| CN110073666A (en) * | 2016-12-14 | 2019-07-30 | 三星电子株式会社 | Configure the display device of multi-display system and the method for controlling it |
| CN108682384A (en) * | 2018-06-28 | 2018-10-19 | 东莞阿尔泰显示技术有限公司 | A kind of LED display control system and its control method |
| CN111510643A (en) * | 2019-01-31 | 2020-08-07 | 杭州海康威视数字技术股份有限公司 | System and method for splicing panoramic image and close-up image |
| CN110633063A (en) * | 2019-09-23 | 2019-12-31 | 东莞阿尔泰显示技术有限公司 | Control framework of all-in-one LED display screen |
| CN112825224A (en) * | 2019-11-20 | 2021-05-21 | 西安诺瓦星云科技股份有限公司 | LED display screen |
| CN211956055U (en) * | 2020-04-22 | 2020-11-17 | 广州视源电子科技股份有限公司 | Splicing type liquid crystal display screen |
| WO2021237434A1 (en) * | 2020-05-26 | 2021-12-02 | 西安诺瓦星云科技股份有限公司 | Display screen configuration method, apparatus and system, and computer-readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114255670A (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10593256B2 (en) | LED display device and method for operating the same | |
| US9747872B2 (en) | LED display device and method for operating the same | |
| US20140292619A1 (en) | Display system, display control apparatus, and image provision apparatus thereof | |
| CN107277595A (en) | A kind of multi-channel video synchronous method and device | |
| US9812059B2 (en) | Display device, method for transmitting data packet, and LED system | |
| CN112335254B (en) | Electronic device and control method thereof | |
| CN114255670B (en) | LED display screen and spliced display screen | |
| US9704430B2 (en) | LED display device and method for operating the same | |
| CN105788513B (en) | A kind of scanning card and LED display display control program | |
| US20200371736A1 (en) | Wireless Content Delivery for a Tiled LED Display | |
| CN110557580A (en) | Image signal switching and converting device and method | |
| WO2019001091A1 (en) | Method and device for video transmission, and computer readable storage medium | |
| KR20190141379A (en) | Electronic apparatus and method for controlling thereof | |
| CN103700319A (en) | Spliced display device | |
| CN211019067U (en) | Data exchange device, display control system, and display system | |
| CN106648487A (en) | Data transmission device and data transmission method of display equipment | |
| KR100881142B1 (en) | Led display apparatus | |
| CN108109577B (en) | LED system and method for operating an LED system | |
| CN113096591B (en) | LED display video transmission method | |
| JPWO2017138171A1 (en) | Video display device, video data transmission method, and program | |
| CN211239967U (en) | Display controller, display control system and LED display system | |
| US20230171374A1 (en) | Screen control system | |
| CN208063339U (en) | A kind of vision signal parser circuitry, vision signal resolver and sending card | |
| CN110933332B (en) | Display control system | |
| CN216980094U (en) | Signal processing system and display system applied to LED display equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |