CN113038235A - Method and system for eliminating split joint television wall dynamic picture fracture through reverse scanning - Google Patents
Method and system for eliminating split joint television wall dynamic picture fracture through reverse scanning Download PDFInfo
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- CN113038235A CN113038235A CN202110287103.0A CN202110287103A CN113038235A CN 113038235 A CN113038235 A CN 113038235A CN 202110287103 A CN202110287103 A CN 202110287103A CN 113038235 A CN113038235 A CN 113038235A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims 6
- 238000006062 fragmentation reaction Methods 0.000 claims 6
- 230000000750 progressive effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical group C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003709 image segmentation Methods 0.000 description 1
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/012—Conversion between an interlaced and a progressive signal
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- Engineering & Computer Science (AREA)
- Computer Graphics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a method and a system for eliminating the fracture of a dynamic picture of a spliced television wall by inverse scanning, wherein all liquid crystal display units corresponding to even rows are installed in an inverted mode; when the dynamic picture has 'gaps', the user sends an instruction for reversing the picture content of the display units in the even rows; the FPGA board of the television wall receives the instruction, then the display content is reversed by the FPGA board and is output and displayed by the LCD screen in a scanning mode, and the odd-even line display units symmetrically display the corresponding pixel points in a positive and negative rotation scanning mode respectively so as to eliminate the phenomena of 'fracture' and 'notch'. The invention eliminates the distortion phenomenon generated when the video wall plays the dynamic picture of the wall, and improves the display picture quality.
Description
Technical Field
The invention relates to the technical field of television wall display, in particular to a method and a system for eliminating the fracture of a dynamic picture of a spliced television wall through reverse scanning.
Background
With the development of television curtain wall related technologies such as a liquid crystal display technology, an embedded hardware splicing technology, a multi-screen image processing technology, a signal switching technology and the like, the novel liquid crystal splicing curtain wall is rapidly popularized in terminal large-screen display equipment applied to engineering.
When a large matrix is used for splicing a television wall, when a dynamic picture is played, the phenomena of 'offset' and 'notch' and the like are generated at the splicing seam of the television wall, so that the picture distortion is caused.
Disclosure of Invention
The invention aims to provide a method and a system for eliminating the fracture of a dynamic picture of a spliced television wall through inverse scanning, which can eliminate the distortion phenomenon generated when the dynamic picture of the television wall is played and improve the display image quality.
The technical scheme adopted by the invention is as follows:
a method for eliminating the fracture of the dynamic picture of a spliced television wall by reverse scanning comprises the following steps:
step 1, when assembling the television wall, carrying out inverted installation on all liquid crystal display units in even rows;
step 2, the user sets the instruction of reversing the picture content of the even line display unit through the OSD menu;
step 3, the FPGA board of the liquid crystal display unit receives the instruction, then the display content is inverted by the FPGA board and is output and displayed by the display screen in a scanning mode,
and 4, symmetrically displaying the corresponding pixel points by the odd-even line display unit in a positive and negative rotation scanning mode respectively so as to eliminate the phenomena of fracture and gap.
Further, as a preferred embodiment, step 2 is to scan the even-numbered lines of the display unit in a reversed manner by adjusting the OSD menu of the even-numbered lines of the display unit of the video wall.
Specifically, the screen content of the display units in the even-numbered rows is reversely scanned in the left-right direction and the up-down direction.
Further, as a preferred embodiment, the display content after the inverse scanning in step 3 is stored in the DDR module first, and then the LVDS content of the DDR module is sequentially output to the T-con board for processing and displaying according to a FIFO (first in first out) principle.
Further, as a preferred embodiment, in step 4, the even-numbered lines of the liquid crystal display screen are sequentially scanned line by line from the bottom right corner to the left and from bottom to top, and the odd-numbered lines of the liquid crystal display unit are sequentially scanned line by line from left to right and from top to bottom. Because the even-numbered lines of liquid crystal display screen are mounted upside down, the progressive line scanning mode of the liquid crystal screens of the display units can be changed from the original sequence of from left to right and from top to bottom from the leftmost upper corner into the progressive line scanning mode of the even-numbered lines of liquid crystal display screen from right to left and from bottom to top from the rightmost lower corner, and the progressive line scanning mode of the odd-numbered lines of liquid crystal display units from left to right and from top to bottom are combined.
A display system for eliminating the fracture of the dynamic picture of a spliced television wall through inversion scanning comprises a liquid crystal main board, an FPGA board, a T-con board and an LCD display screen; the display device processes the input signal through the liquid crystal mainboard to convert the input signal into display content of an LVDS signal, and then outputs the display content to the FPGA board through an LVDS line; the FPGA boards in the odd rows do not process the display content, and the FPGA boards in the even rows perform inversion processing on the display content; the liquid crystal T-con board receives the display content sent by the FPGA and drives an LCD display screen to display in a scanning mode, and the LCD display screen forms a television wall.
Further, as a preferred embodiment, the FPGA board includes a Flash storage module, a TTL conversion module, an FPGA module, an LVDS conversion module, and a DDR module, and the Flash storage module is used to store a program for the FPGA module to work; the TTL conversion module is used for converting LVDS signals transmitted by the liquid crystal main board into TTL signals processed by the FPGA module, the FPGA module is used for inverting images of the TTL signals of each Frame, and the LVDS conversion module is used for converting the TTL signals inverted by the FPGA module into LVDS signals and storing the LVDS signals to the DDR module; the DDR module is used for storing the LVDS signals after inversion processing, and outputting the content of the corresponding Frame LVDS signals in the DDR module to the T-con board according to the first-in first-out principle.
Further, as a preferred embodiment, the LCD display screen forms an N x M matrix television wall. (N < =10, M < =10)
By adopting the technical scheme, the invention realizes picture correction compensation by reversely scanning the images of the display units of the even number of lines of the television wall, so that the lines of the picture look natural without fracture or gap, thereby achieving the normal display effect of the dynamic picture. The invention eliminates the distortion phenomenon generated when the video wall plays the dynamic picture of the wall, and improves the display picture quality.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a schematic diagram of a normal 6 × 6 matrix video wall showing dynamic picture effect;
FIG. 2 is a schematic diagram of the effect of playing dynamic pictures on an actual 6 × 6 matrix video wall;
FIG. 3 is a schematic diagram of an equivalent liquid crystal driving structure of a liquid crystal panel;
FIG. 4 is a schematic diagram of displaying a Frame delay of 1 Frame at the same point on a video wall;
FIG. 5 is a schematic diagram of even-numbered line inversion scanning;
FIG. 6 shows the effect of the even rows after reverse scanning;
FIG. 7 is a schematic structural diagram of a display system for eliminating the cracking of the dynamic picture of the tiled TV wall by inverse scan according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in one of fig. 1 to fig. 7, the present invention discloses a method for eliminating the fracture of the dynamic picture of the tiled television wall by inverse scanning, which comprises the following steps:
step 1, when assembling the television wall, carrying out inverted installation on all liquid crystal display units in even rows;
step 2, the user sets the instruction of reversing the picture content of the even line display unit through the OSD menu;
step 3, the FPGA board of the liquid crystal display unit receives the instruction, then the display content is inverted by the FPGA board and is output and displayed by the display screen in a scanning mode,
and 4, symmetrically displaying the corresponding pixel points by the odd-even line display unit in a positive and negative rotation scanning mode respectively so as to eliminate the phenomena of fracture and gap.
Further, as a preferred embodiment, step 2 performs "left-right", "up-down" reverse scanning on the even-numbered line display unit screen content by adjusting the OSD menu of the even-numbered line display unit of the tv wall.
Further, as a preferred embodiment, the display content after the inverse scanning in step 3 is stored in the DDR module first, and then the LVDS content of the DDR module is sequentially output to the T-con board for processing and displaying according to a FIFO (first in first out) principle.
Further, as a preferred embodiment, in step 4, the even-numbered lines of the liquid crystal display screen are sequentially scanned line by line from the bottom right corner to the left and from bottom to top, and the odd-numbered lines of the liquid crystal display unit are sequentially scanned line by line from left to right and from top to bottom. Because the even-numbered lines of liquid crystal display screen are mounted upside down, the progressive line scanning mode of the liquid crystal screens of the display units can be changed from the original sequence of from left to right and from top to bottom from the leftmost upper corner into the progressive line scanning mode of the even-numbered lines of liquid crystal display screen from right to left and from bottom to top from the rightmost lower corner, and the progressive line scanning mode of the odd-numbered lines of liquid crystal display units from left to right and from top to bottom are combined.
As shown in fig. 7, a display system for eliminating the fracture of the dynamic picture of the spliced television wall by inverse scanning comprises a liquid crystal main board, an FPGA board, a liquid crystal T-con board and an LCD display screen; the display device processes the input signal through the liquid crystal mainboard to convert the input signal into display content of a TMDS signal, and then outputs the display content to the FPGA board through the LVDS line; the FPGA board carries out inversion scanning processing on the display content and outputs the display content to the liquid crystal T-con board, the liquid crystal T-con board is used for receiving the display content after line inversion scanning processing and driving the LCD display screen to display pictures, and the LCD display screen forms a television wall.
Further, as a preferred embodiment, the FPGA board includes a Flash storage module, a TTL conversion module, an FPGA module, an LVDS conversion module, and a DDR module, and the Flash storage module is used to store a program for the FPGA module to work; the TTL conversion module is used for converting TMDS signals transmitted by the liquid crystal main board into TTL signals processed by the FPGA module, the FPGA module is used for inverting images of the TTL signals of each Frame, and the LVDS conversion module is used for converting the TTL signals inverted by the FPGA module into LVDS signals and storing the LVDS signals to the DDR module; the DDR module is used for storing the LVDS signals after inversion processing, and outputting the content of the corresponding Frame LVDS signals in the DDR module to the T-con board according to the first-in first-out principle.
Further, as a preferred embodiment, the LCD display screen forms an N x M matrix television wall. (N < =10, M < =10)
The following is a detailed description of the specific working principle of the present invention:
taking a television wall spliced by a 6 × 6 matrix as an example, playing a dynamic picture:
as shown in fig. 1, during the playing of the dynamic picture from left to right, the vertical line of the pattern should be a smooth line, so that the user can see the picture without distortion. However, in the process of playing the dynamic picture, a "gap" may be generated at the position of the splicing seam on the display unit of the tv wall, as shown in fig. 2.
The specific causes of this phenomenon are: as shown in FIG. 3, the capacitance of each TFT connected in parallel with Clc and Cs in the equivalent circuit of the whole panel represents a display point, and a basic display unit pixel needs three display points, which respectively represent the RGB three primary colors. For a TFT LCD with a resolution of 1024 × 768, a total of 1024 × 768 × 3 such dots are required. The whole panel turns on the TFTs of each row in sequence by the waveform sent by the gate driver in FIG. 3, so that the source driver of the whole row charges the display points of the whole row to the required voltage and displays different gray scales. When the corresponding line is charged, the gate driver turns off the voltage, then the gate driver of the next line turns on the voltage, and the same row of source drivers charges and discharges the display points of the next line. In this sequence, when the display dots of the last row are filled, the charging is started again from the first row, i.e. the line-by-line scanning is performed.
For a liquid crystal display with a resolution of 1024 × 768 SVGA, there are 768 rows of gate traces in total, and 1024 × 3=3072 source traces are required. The typical lcd usually has a 60Hz refresh rate, and each frame has a display time of about 1/60=16.67 ms. Since the screen has gate lines constituting 768 lines, the switching time allocated to each gate line is about 16.67ms/768=21.7us, i.e., 1 Frame (Frame) time. Therefore, the waveform sent out from the gate driver in fig. 3 is a pulse wave with a width of 21.7us one after another, and the TFTs in each row are turned on sequentially. And the source driver charges and discharges the display electrode to the required voltage through the source wire within the 21.7us time, thereby displaying the corresponding gray scale.
Taking a 6 × 6 matrix tv wall as an example, after image segmentation, i.e. 36 equal divisions of the image are performed, each display unit should normally display 1/36 parts of the image. However, the liquid crystal display is scanned line by line, which causes all the display units of the tv wall in the same column in the 6 × 6 matrix to display the same image at the same point when playing the dynamic picture, which causes the picture to feel "distorted" by the lines of the picture during the moving process, as shown in fig. 4.
As shown in fig. 5, the present invention is implemented by performing inversion scanning on even-numbered lines in order to eliminate the "breaking" phenomenon of the picture. Specifically, in the even-numbered rows: and in the second, fourth and sixth rows, the display units are arranged to perform reverse scanning on the display image content output by the main board (the display units are required to be installed in an inverted manner when forming the television wall), namely, each display unit performs left-right and up-down reverse processing on the image of each Frame through the FPGA functional module in the internal processing, and then outputs the processed image to the liquid crystal display screen.
As shown in fig. 6, at this time, since the even-numbered lines of the lcd are mounted upside down, the line scanning mode of the lcd of each display unit gradually changes from the original sequence of "from left to right" and "from top to bottom" from the top left corner to the progressive scanning mode of "from right to left" and "from bottom to top" from the bottom right corner, so that the lines of the picture are more natural to look at by combining with the line scanning of the odd-numbered lines of the lcd display units from left to right and "from top to bottom" and the corresponding pixels of the odd-numbered lines of the lcd display units are symmetrically displayed to repair the "cracks" and "gaps", thereby realizing the picture correction compensation and achieving the normal display effect of the dynamic picture.
By adopting the technical scheme, the invention realizes picture correction compensation by reversely scanning the images of the display units of the even number of lines of the television wall, so that the lines of the picture look natural without fracture or gap, thereby achieving the normal display effect of the dynamic picture. The invention eliminates the distortion phenomenon generated when the video wall plays the dynamic picture of the wall, and improves the display picture quality.
It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (8)
1. A method for eliminating the fracture of the dynamic picture of a spliced television wall by reverse scanning is characterized in that: which comprises the following steps:
step 1, when assembling the television wall, carrying out inverted installation on all liquid crystal display units in even rows;
step 2, the user sets the instruction of reversing the picture content of the even line display unit through the OSD menu;
step 3, the FPGA board of the liquid crystal display unit receives the instruction, then the display content is inverted by the FPGA board and is output and displayed by the display screen in a scanning mode,
and 4, symmetrically displaying the corresponding pixel points by the odd-even line display unit in a positive and negative rotation scanning mode respectively so as to eliminate the phenomena of fracture and gap.
2. The method for eliminating the fragmentation of the dynamic picture of the spliced television wall by the inverse scanning as claimed in claim 1, wherein: and 2, reversing the picture of the even-numbered line display unit by adjusting the OSD menu of the even-numbered line display unit of the television wall.
3. The method for eliminating the fragmentation of the dynamic picture of the spliced television wall by the inverse scan as claimed in claim 2, wherein: the picture content of the display units in the even rows is inverted from left to right and from top to bottom.
4. The method for eliminating the fragmentation of the dynamic picture of the spliced television wall by the inverse scanning as claimed in claim 1, wherein: and 3, storing the display content subjected to the inversion processing in the DDR module, and outputting the LVDS content of the DDR module to a T-con plate for scanning display according to a FIFO (first in first out) principle.
5. The method for eliminating the fragmentation of the dynamic picture of the spliced television wall by the inverse scanning as claimed in claim 1, wherein: in step 4, the liquid crystal display units in the even rows are sequentially scanned line by line from the bottom right corner to the left and from the bottom to the top, and the liquid crystal display units in the odd rows are sequentially scanned line by line from the left to the right and from the top to the bottom.
6. A display system for eliminating the fracture of the dynamic picture of the spliced television wall by inverse scanning, which adopts the method for eliminating the fracture of the dynamic picture of the spliced television wall by inverse scanning as claimed in any one of claims 1 to 5, and is characterized in that: the system comprises a liquid crystal main board, an FPGA board, a T-con board and an LCD display screen; the display device processes the input signal through the liquid crystal mainboard to convert the input signal into display content of an LVDS signal, and then outputs the display content to the FPGA board through an LVDS line; the FPGA boards in the odd rows do not process the display content, and the FPGA boards in the even rows perform inversion processing on the display content; the liquid crystal T-con board receives the display content sent by the FPGA and drives an LCD display screen to display in a scanning mode, and the LCD display screen forms a television wall.
7. The display system for eliminating the fragmentation of the dynamic pictures of the spliced television wall by the inverse scanning as claimed in claim 6, wherein: the FPGA board comprises a Flash storage module, a TTL conversion module, an FPGA module, an LVDS conversion module and a DDR module, wherein the Flash storage module is used for storing a working program of the FPGA module; the TTL conversion module is used for converting LVDS signals transmitted by the liquid crystal main board into TTL signals processed by the FPGA module, the FPGA module is used for inverting images of the TTL signals of each Frame, and the LVDS conversion module is used for converting the TTL signals inverted by the FPGA module into LVDS signals and storing the LVDS signals to the DDR module; the DDR module is used for storing the LVDS signals after inversion processing, and outputting the content of the corresponding Frame LVDS signals in the DDR module to the T-con board according to the first-in first-out principle.
8. The display system for eliminating the fragmentation of the dynamic pictures of the spliced television wall by the inverse scanning as claimed in claim 6, wherein: the LCD display screen forms an N multiplied by M matrix television wall, N < =10, M < = 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287103.0A CN113038235A (en) | 2021-03-17 | 2021-03-17 | Method and system for eliminating split joint television wall dynamic picture fracture through reverse scanning |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110287103.0A CN113038235A (en) | 2021-03-17 | 2021-03-17 | Method and system for eliminating split joint television wall dynamic picture fracture through reverse scanning |
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| CN202110287103.0A Pending CN113038235A (en) | 2021-03-17 | 2021-03-17 | Method and system for eliminating split joint television wall dynamic picture fracture through reverse scanning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023028885A1 (en) * | 2021-08-31 | 2023-03-09 | 京东方科技集团股份有限公司 | Display control method, display control apparatus and display apparatus |
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| WO2010147049A1 (en) * | 2009-06-16 | 2010-12-23 | シャープ株式会社 | Data signal-line driving circuit, liquid-crystal display device, and driving method of liquid-crystal display device |
| CN105578103A (en) * | 2014-12-22 | 2016-05-11 | 三星电子株式会社 | Display device, display system including the same and display method thereof |
| WO2017004879A1 (en) * | 2015-07-03 | 2017-01-12 | 青岛海信电器股份有限公司 | Liquid crystal display processing method, device and apparatus |
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- 2021-03-17 CN CN202110287103.0A patent/CN113038235A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010147049A1 (en) * | 2009-06-16 | 2010-12-23 | シャープ株式会社 | Data signal-line driving circuit, liquid-crystal display device, and driving method of liquid-crystal display device |
| CN105578103A (en) * | 2014-12-22 | 2016-05-11 | 三星电子株式会社 | Display device, display system including the same and display method thereof |
| WO2017004879A1 (en) * | 2015-07-03 | 2017-01-12 | 青岛海信电器股份有限公司 | Liquid crystal display processing method, device and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210625 |