KR102105801B1 - Led electronic display system for displaying video on inclined led display panel - Google Patents

Abstract

The purpose of the present invention is to provide an electronic display system that can rotate and output an image, which is outputted on an inclined installed electronic display, by one-degree unit. An LED electronic display system according to the present invention is characterized by comprising: a main controller (1); an electronic display (2) which is electrically connected to the main controller (1) and is composed by connecting a plurality of display units (2-1, 2-2, ... , 2-k); and a sub-controller (20) which is provided on each of the display units (2-k) and is for rotating and outputting an inclined image by using image and information data of the main controller (1), wherein the sub-controller (20) comprises: a first address generating unit (24) which sets a writing region for storing image data; a first register (25) for storing a vertex coordinate of a first region corresponding to an image to be outputted and a rotating angle (θ) which are received from the main controller (1); a second address generating unit (26) which generates read addresses by means of calculation using the vertex coordinate and rotating angle stored in the first register (25) and a variable table value stored in a second register (27); and a memory control unit (28) which controls a memory (29), in which image data are stored, thereby reading and writing data.

Description

LED electronic display system for displaying an image on an LED electronic display with a tilting angle {LED ELECTRONIC DISPLAY SYSTEM FOR DISPLAYING VIDEO ON INCLINED LED DISPLAY PANEL}

The present invention relates to an LED signboard system. More specifically, the present invention relates to a display panel system capable of displaying by changing an angle of an image displayed on a display board installed to have a slope.

In general, large display boards installed in spaces such as auditoriums, gymnasiums, and churches are implemented by attaching multiple display units like a mosaic because it is impossible or expensive to manufacture with a single large panel. The large electronic display includes a main controller, a sub-controller for controlling each display unit, and an LED module controlled by the sub-controller to display an image on the screen.

On the other hand, in recent years, the demand for tilting and installing an electronic signboard to increase the effect on media art or building scenery is increasing. FIG. 1 (a) shows the electronic display installed at an angle. In this way, since the electronic display is installed at a certain angle from the horizontal, the image displayed thereon is also output at an angle. As shown in (b), the tilted image needs to be output by changing the tilt of the outputted image at a certain angle.

Republic of Korea Patent Publication No. 10-2016-0011016 discloses a technique for horizontally outputting the tilted original image data to a display by allowing the inputted tilted image data to be corrected and output by the measured tilt value. Doing. However, in such a prior art, since the edited image data must be input each time the inclination of the installed camera is changed, it takes a lot of memory, time, and cost, and further, there is a problem that it is difficult to apply to the LED display system.

Accordingly, the inventors of the present invention intend to propose an electronic signboard system capable of outputting by changing the inclination of the image only by operating the main controller without editing the image.

An object of the present invention is to provide an electronic display system capable of rotating and outputting an image output to an electronic display installed at an angle of one degree.

Another object of the present invention is to provide an electronic display system capable of outputting a tilted image only by manipulation of the main controller.

The above objects and other intrinsic objects of the present invention can be easily achieved by the present invention described below.

LED signboard system according to the present invention

Main controller 1;

The main controller (1) is electrically connected, a plurality of display units (2-1, 2-2, ..., 2-k) is connected to the electronic display board (2) configured; And

A sub-controller 20 provided in each of the display units 2-k and configured to rotate and output an inclined image using the image and information data of the main controller 1;

Including, the sub-controller 20 is

A first address generator 24 for setting a writing area for storing image data;

A first register 25 for receiving and storing coordinates and rotation angles θ of the vertices of the first region corresponding to the image to be output from the main controller 1;

A second address generator 26 for generating a read address through an operation using coordinates and rotation angles of the vertices stored in the first register 25 and variable table values stored in the second register 27; And

A memory control unit 28 that controls the memory 29 in which image data is stored to read and write data;

It includes,

The image data is transmitted to the LED display controller 20-1 according to the read address calculated by the second address generator 26, and the sub-controller 10 outputs image data with a converted slope. Is done.

In the present invention, the first address generator 24 uses the coordinates of vertices a, b, c, and d of the first area stored in the first register 25 to generate a write address, and these four points Set the smallest value (x ₀ ) of the X-axis coordinates as the starting point of the X-axis, the largest value (x ₁ ) as the end-point of the X-axis, and the smallest of the four Y-axis coordinate values in the Y-axis direction ( Set y ₀ ) as the starting point of the Y axis, and set the largest value (y ₁ ) as the ending point of the Y axis.A (x ₀ , y ₀ ), B (x ₁ , y ₀ ), C which are the four vertex coordinates of the second area. (x ₀ , y ₁ ) and D (x ₁ , y ₁ ) may be set.

In the present invention, among the vertex coordinates a, b, c, and d of the first region, the second address generator 26 becomes a point, which is the first reference point in the reading order,

When reading the image data, (0,0), (1,0), (2,0), (3,0), ..., (m, 0), (0,1), (1,1), (2,1), (3,1), ..., (m-1, n), (m, n)

When the rotation angle θ is given, the order of reading is maintained starting from the coordinates of point a to the coordinates of point d as in the case where the rotation angle θ is 0, but the image data is converted. It is preferable to load from the address corresponding to the coordinates and send it to the LED display controller 20-1 for output.

In the present invention, the variable value of the coordinates to be transformed is referred to as (x, y), and the x 'value of the transformed coordinates (x', y ') is represented by Equation 1 below, and the y' value is It is preferable to be determined by Equation 2.

[Equation 1]

Where M is the X value of the a coordinate,

[Equation 2]

Here, N is the Y value of the a coordinate, and the values of α and β are according to FIG. 5.

In the LED signboard system according to the present invention, a method for expressing an image on an LED signboard having a tilt is

Receiving data from the main controller;

Separating the data into information data and image data;

Generating a write address and storing the first area and the second area of the tilted image;

Generating a read address but reading image data in the order of the first area; And

Outputting the image data stored in the converted read address to the LED module;

It characterized in that it comprises a.

The present invention has the effect of providing an electronic signboard system that allows an image output to the electronic signboard installed at an angle to be rotated and output in units of one degree.

FIG. 1 is a schematic conceptual view showing a screen on which an image is output on an inclined electronic display.
2 is a schematic block diagram showing an electronic signboard system according to the present invention.
3 is a block diagram showing a sub-controller of the electronic signboard system according to the present invention.
4 is a graph for explaining coordinate values corrected by converting a slope in a sub-controller of the electronic display system according to the present invention.
5 is a variable table for calculating the corrected coordinate values in the sub-controller of the electronic display system according to the present invention.
6 is a graph for explaining coordinate values corrected by converting a slope in a sub-controller of the electronic display system according to the present invention.
7 shows a flowchart for representing an image on an LED display board having a slope according to the present invention.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic block diagram showing an electronic signboard system according to the present invention. As shown in FIG. 2, the signboard system according to the present invention includes a main controller 1 and a signboard 2.

The main controller 1 is electrically connected to the scoreboard 2 and outputs an image input from the outside to the scoreboard 2. To this end, it is equipped with a DVI or HDMI port for video input from the outside, and transmits and receives modules to digitalize the received video, transmits and outputs, central processing unit, memory for storing data, and controls reading and writing of memory. It includes a memory controller for controlling, an operation unit for performing external input by a user, a display controller for controlling each display module by transmitting image and information data to the electronic display board 2.

The display board 2 is configured by connecting a plurality of display units 2-1, 2-2, ..., 2-k. Each display unit 2-k includes a sub-controller 20 that controls the display unit according to the output image and information data, a display module that outputs the image, and an LED display controller 20-1 for controlling the display module. It includes a memory for data storage, a memory controller for memory control, a data input / output port, and a transmission / reception module.

The sub-controller 20 rotates the tilted image using the image and information data of the main controller 1 and outputs it to the display module. The details of the sub-controller 20 will be described with reference to FIG. 3.

3 is a block diagram showing the sub-controller 20 of the electronic display system according to the present invention. 3, the sub-controller 20 includes a data receiving unit 21, an information data processing unit 22, an image data processing unit 23, a first address generation unit 24, a first register 25, It includes a second address generation unit 26, a second register 27, a memory control unit 28 and a memory 29.

The data receiving unit 21 receives data from the main controller 1. The received data includes image data and information data. The information data includes various pieces of information sent from the main controller, for example, coordinates of a pixel and an angle of rotation necessary to express an image by tilting it. The information data processing unit 22 analyzes the information data from the data received from the main controller 1, so that a writing area and a reading area can be set to output image data reflecting a slope using the received information. The image data processing unit 23 extracts the image data so that the image data can be stored in the memory from the data received by the main controller 1.

The first address generator 24 sets a writing area for storing image data, and includes a second area to display the first area shown in FIG. 4, which is an actually output image part. Produces The memory capacity of at least the second area is used to output the output of the first area at an angle. The first register 25 receives and stores coordinates and rotation angles of the vertices from the main controller 1. The second address generator 26 generates a read address through an operation using coordinates, rotation angles, and variable table values stored in the second register 27 and the vertex coordinates stored in the first register 25. The memory control unit 28 controls the memory 29 to read and write data. The image data is sequentially transmitted to the LED display controller 20-1 according to the read address calculated by the second address generator 26 and output as an image to the LED module.

4 is a graph for explaining the coordinate values corrected by converting a slope in the sub-controller 20 of the electronic display system according to the present invention, and FIG. 5 is the coordinates corrected by the sub-controller 20 of the electronic display system according to the present invention It is a variable table for calculating values. The process of outputting an image data with an angle will be described with reference to FIGS. 3 to 5 together.

The image data received from the main controller 1 is sequentially stored in the memory 29 according to the address generated by the first address generator 24. In FIG. 4, the first area is an image output to the actual display module, and the second area is a square area in which the first area is placed on the X and Y axes. Since the areas written to the memory are the first and second areas, capacity twice the memory allocation amount of the first area actually output is required.

Using the coordinates of vertices a, b, c, d of the first area received from the main controller 1 and stored in the first register 25 to generate a write address, the smallest of the four X-axis coordinate values Set the value (x ₀ ) as the starting point of the X axis and the largest value (x ₁ ) as the ending point of the X axis. Set the smallest value (y ₀ ) of the Y-axis coordinate values of the four points in the Y-axis direction as the starting point of the Y-axis, and the largest value (y ₁ ) as the end point of the Y-axis. According to these settings, A (x ₀ , y ₀ ), B (x ₁ , y ₀ ), C (x ₀ , y ₁ ), D (x ₁ , y ₁ ), which are the four vertex coordinates of the second region, are obtained. . To simplify the operation and write address, the coordinates of A (x ₀ , 0) are corrected to A (0,0), and the coordinates of D (x ₁ , y ₁ ) are corrected to D (X ', Y'). (0,0), (1,0), (2,0), ..., (X ', 0), (0,1), (1,1), (2,1), .. ., (X ', 1), (0,2), (1,2), (2,2), ..., (X', 2), ..., (X'-1, Y ' ) (X ', Y').

In order to generate the read address, the second address generator 26 sets the read address using the coordinates of vertices a, b, c, and d of the first area stored in the first register 26, and sets the read address and Image data corresponding to the corresponding coordinates are retrieved from the memory 29 and transmitted to the LED display controller 20-1 according to the corrected address value using the rotation angle θ and the variable table stored in the second register 27 So that it can be output to the LED module. The rotation angle θ is set to a positive value on the Y axis (90 degrees) from the X axis (0 degrees).

The vertex coordinates a, b, c, and d of the first region are received from the main controller 1 and stored in the first register 25. Here, the first reference point in the reading order is a point. When the coordinates of a reference point a are a (0,0), b (m, 0), c (0, n), and d (m, n), the first when the rotation angle θ is 0 degrees The coordinates of the vertices a, b, c, d of the region and the vertices A, B, C, D of the second region coincide in order. When reading image data, (0,0), (1,0), (2,0), (3,0), ..., (m, 0) are always based on the a (0,0) coordinates. ), (0,1), (1,1), (2,1), (3,1), ..., (m-1, n), (m, n).

When the rotation angle (θ) is given, the reading order maintains the order of starting from the coordinates of point a to the coordinates of point d, such as when the rotation angle (θ) is 0, but the image data corresponds to the converted coordinates. The image rotated by the rotation angle θ is outputted by calling it from the address and sending it to the LED display controller 20-1 to be output to the LED module. If the variable value of the coordinates converted by the above order is (x, y), the x 'value of the converted coordinates (x', y ') is represented by Equation 1 below, and the y' value is the following mathematics. It is determined by Equation 2.

[Equation 1]

Here, M is the X value of the a coordinate.

[Equation 2]

Here, N is the Y value of the a coordinate, and α and β are in accordance with the values shown in FIG. 5.

According to the variable table in FIG. 5, an image may be rotated and output in units of 1 degree from 0 to 90 degrees. As in FIG. 6, when it is necessary to rotate by θ in the opposite direction to FIG. 4 (270≤θ≤360), the rotation angle is (360-θ) and the α value is multiplied by (-1) to obtain Equation 1 , 2 applies.

7 is a flow chart showing a process for representing an image on the LED display system having a tilt according to the present invention. The process of outputting an image in the present invention will be described with reference to FIG. 7.

In step S1, the sub-controller 20 receives data from the main controller 1. The received data is divided into information data and image data in step S2, and image data is stored in the order of write addresses for the first region and the second region of the tilted image in the next step S3. In the next step S4, the read addresses are formed in the order of the first area, but the image data to be output reads the image data stored in the converted read address. The image data read in the next step S5 is output to the LED module, and the image tilted by the rotation angle θ received from the main controller is output to the LED display 2.

It should be noted that the description of the present invention described above is merely an example for understanding the present invention, and is not intended to determine the scope of the present invention. The protection scope of the present invention is defined by the appended claims, and it should be understood that within this range, simple modifications or changes of the present invention are all within the protection scope of the present invention.

1: Main controller 2: Electronic display board
2-k: Display unit 10: Sub controller

Claims (5)

Main controller 1;
The main controller (1) is electrically connected, a plurality of display units (2-1, 2-2, ..., 2-k) is connected to the electronic display board (2) configured; And
A sub-controller 20 provided in each of the display units 2-k and configured to rotate and output an inclined image using the image and information data of the main controller 1;
Including, the sub-controller 20 is
A first address generator 24 for setting a writing area for storing image data;
A first register 25 for receiving and storing coordinates and rotation angles θ of the vertices of the first region corresponding to the image to be output from the main controller 1;
A second address generator 26 for generating a read address through an operation using coordinates and rotation angles of the vertices stored in the first register 25 and variable table values stored in the second register 27;
A memory control unit 28 that controls the memory 29 in which image data is stored to read and write data; And
An LED display controller 20-1 for transmitting image data stored in the memory 29 and outputting the image data to the LED module according to the read address calculated by the second address generator 26;
Including, the sub-controller 20 is LED display system, characterized in that for outputting the image data is converted inclination. The method of claim 1, wherein the first address generator 24 uses the coordinates of vertices a, b, c, and d of the first area stored in the first register 25 to generate a write address. Set the smallest value (x ₀ ) of the X-axis coordinate values of the four points as the starting point of the X axis, the largest value (x ₁ ) as the end point of the X-axis, and the smallest of the Y-axis coordinate values of the four points in the Y-axis direction. Set the value (y ₀ ) as the starting point of the Y-axis and the largest value (y ₁ ) as the end-point of the Y-axis, A (x ₀ , y ₀ ), B (x ₁ , y ₀ ), the coordinates of the four vertices in the second area. , C (x ₀ , y ₁ ), D (x ₁ , y ₁ ). The method according to claim 1, wherein the second address generator 26 is a point among the vertex coordinates a, b, c, d of the first area, and a reference point that is the first in the reading order is a point.
When reading the image data, (0,0), (1,0), (2,0), (3,0), ..., (m, 0), (0,1), (1,1), (2,1), (3,1), ..., (m-1, n), (m, n)
When the rotation angle θ is given, the order of reading is maintained starting from the coordinates of point a to the coordinates of point d as in the case where the rotation angle θ is 0, but the image data is converted. LED signboard system characterized in that it is called from the address corresponding to the coordinates and sent to the LED display controller 20-1 for output. The method of claim 3, wherein the variable value of the transformed coordinate is (x, y), and the x 'value of the transformed coordinate (x', y ') is represented by Equation 1 below, and the y' value is LED signboard system characterized in that it is determined by Equation 2:
[Equation 1]

Where M is the X value of the a coordinate,
[Equation 2]

Here, N is the Y value of the a coordinate, and the values of α and β are according to FIG. 5. delete

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