KR100579048B1 - Pixel formation method for electric sign - Google Patents

Abstract

The present invention relates to a method of forming a pixel of an electronic display board displaying a plurality of light emitting diodes (LEDs) in a matrix form to express an image as well as a character or a figure.

In the present invention, the RGB light emitting diodes for color image representation are arranged in a geometric pattern (for example, rhombus and triangle), as well as fields in which pixels according to the arranged light emitting diodes are diagonally disposed, that is, even fields. By forming an alternating display of the light emitting diodes in the odd field and the odd field, it is possible to form a high resolution frame from the afterimage of the RGB light emitting diode even if the number of light emitting diodes arranged per unit area of the pixel is the same. Provided is a pixel forming method of an electric sign board that can improve not only the color of the image but also the sharpness through the high resolution frame.

Light Emitting Diodes, Arrays, Matrix, Billboards, Pixels

Description

Pixel formation method for electric sign

1 is a structural diagram of a conventional frame and even and odd field memories;

2 is a layout view of a conventional R.G.B light emitting diode in a ratio of 2: 1: 1.

Figure 3 is an embodiment of the R.G.B light emitting diode in a ratio of 2: 1: 1 in one embodiment of the present invention.

Figure 4 is an embodiment of the R.G.B light emitting diode in a ratio of 1: 1: 1 in another embodiment of the present invention.

5 is a schematic structural diagram of a frame formed from a combination of even and odd fields in one embodiment of the invention.

6 is an arrangement diagram of even fields in which image information of horizontal scan lines is alternately expressed from even and odd field memories according to an embodiment of the present invention;

FIG. 7 is an arrangement diagram of odd fields in which image information of horizontal scan lines is alternately expressed from even and odd field memories according to an embodiment of the present invention; FIG.

8 is an arrangement diagram of a high resolution frame composed of even and odd fields in one embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

R; Red light emitting diode

G; Green light emitting diode

B; Blue light emitting diode

The present invention relates to an electronic display board that displays a plurality of light emitting diodes (LEDs) in a matrix form to represent images as well as characters or figures. In particular, red (R), green (G), and blue (B) for color image representation After arranging the light emitting diodes in a geometric pattern (for example, rhombus and triangle), pixels are formed by alternating display of light emitting diodes located in diagonal fields, that is, even and odd fields, from the afterimage of the light emitting diode. The present invention relates to a pixel forming method of an electric signboard that enables to form a high resolution frame, and to further improve the color as well as the sharpness of an image through the high resolution frame.

As is well known, video signals such as video and screens of PCs are converted into digital information by conventional signal processing circuits and devices, and stored in video memory in the image processing section of a general electronic board controller.

In this case, as shown in FIG. 1, the field memory is duplicated with even and odd numbers, and the memory capacity is increased in basic units (eg 1 line, 2 lines, 4 lines, 8 lines, 16 lines, etc.). It is used to store image information of horizontal scan line.

That is, the image information is divided into even-numbered pixels and odd-numbered pixels, and the image information is stored in even- and odd-numbered field memories, respectively.

In order to express the image information stored in the memory as described above, an RGB light emitting diode having a matrix shape is applied to the display board. In the case of such a display board, a light emitting diode of RGB 3 colors is properly lit and displayed to express a color image. By turning it off, the image appears in color when viewed from a distance.

In this case, the light emitting diode array structure (eg, when R.G.B is arranged in a ratio of 2: 1: 1) of the light emitting plate as shown in FIG. 2,

The odd-numbered lines L1, L3, ..., L7 of the first, third, fifth, seventh are arranged by repeating the light emitting diodes of the RG, and the even-numbered lines L2, L4, ..., L8 of the second, fourth, sixth, and eighth. ) Is arranged by repeating the light emitting diodes of B and R. Accordingly, the light emission of RB is applied to the first to eighth columns C1, C2, ..., C8 of the first to eighth lines L1, L2, ..., L8. The diode and the light emitting diode of the GR have a repeating structure.

That is, the arrangement is such that the first to eighth lines L1, L2, ..., L8 as well as the first to eighth columns C1, C2, ..., C8 are equally spaced with respect to the pixel points. Accordingly, in the related art, when the color is actually expressed through the light emitting diode of RGB in the open air, the color perception of the image is reduced as well as the sharpness of the image, and the visual recognition is inevitably deteriorated.

In other words, in the related art, a conventional RGB light emitting diode having an equal interval is repeatedly arranged on a basic pixel of an electronic display board, which is an array structure that implements only one pixel per line, and has a third color due to the afterimage of the RGB light emitting diode. The expression had to be made in a very limited manner, and the limitation of the color expression would cause a problem of degrading the visual perception of the display board while causing a decrease in the color as well as the sharpness of the image expressed from the display board.

In addition, since the R.G.B light emitting diodes repeatedly arranged in the pixels of the conventional electronic board are arranged at equal intervals, a large number of R.G.B light emitting diodes arranged per unit area of the pixel may be required.

That is, in the case of the electronic display board, the luminance is reduced when the area or the light emitting point is reduced per pixel, resulting in a phenomenon that the screen is not smooth and blurry. To solve this problem, a plurality of light emitting diodes per pixel have to be solved.

However, even if a plurality of light emitting diodes are applied per pixel as described above, since the arrangement of the light emitting diodes is normalized, not only does not form a high resolution frame due to the afterimage of the light emitting diodes but also does not improve the color and sharpness of the image. It was.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, the present invention, as well as the arrangement of the light emitting diodes of RGB for color image representation in a geometric pattern (eg rhombus, triangle), the arrangement RGB according to the light emitting diodes are formed by alternating display of light emitting diodes located in diagonal fields, that is, even and odd fields, so as to be equal to the number of conventional light emitting diodes arranged per unit area of pixels. The purpose of the present invention is to provide a pixel forming method of an electronic display board that enables to form a high resolution frame from the afterimage of the light emitting diode and to further improve the color and sharpness of the image through the high resolution frame. have.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is an arrangement diagram of an R.G.B light emitting diode in a ratio of 2: 1: 1 according to an embodiment of the present invention.

As shown in FIG. 3, in a conventional light emitting diode array structure in which a plurality of R.G.B light emitting diodes for color image representation are arranged in a matrix form at a ratio of 2: 1: 1,

For one pixel, two red light emitting diodes (R) and one light emitting diode of green (G) and blue (B) are adjacent to each other so that a rhombus shape is repeatedly arranged.

Only red light emitting diodes are arranged in the first, third, fifth, and seventh lines L1, L3, L5, and L7 and the first, third, fifth, and seventh columns C1, C3, C5, and C7.

The light emitting diodes are arranged in the order of green (G) and blue (B) in the second and sixth lines (L2 and L6) and the second and sixth columns (C2 and C6) so as to be located diagonally from the red (R) light emitting diode. Iterate over,

The fourth and eighth columns C4 and C8 of the second and sixth lines L2 and L6 have light emitting diodes in the order of blue (B) and green (G) in a diagonal direction from the red (R) light emitting diode. Iterate over,

The light emitting diodes are arranged in the order of blue (B) and green (G) in the fourth and eighth lines (L4 and L8) and the fourth and eighth columns (C4 and C8) so as to be located diagonally from the red (R) light emitting diode. Iterate over,

The light emitting diodes are arranged in the order of green (G) and blue (B) in the second and sixth columns C2 and C6 of the fourth and eighth lines L4 and L8 in a diagonal direction from the red (R) light emitting diodes. Repeat the array.

That is, the present invention, as shown in Figure 2, the first, third, fifth, seventh line (L1, L3, L5, L7) and the first, third, five, seventh column (C1, C3, C5, C7) Only red (R) light emitting diodes are arranged.

Thereafter, green (G) and blue (B) light emitting diodes are disposed in the second and sixth lines L2 and L6 and the second and sixth columns C2 and C6 so as to be located diagonally from the red (R) light emitting diode. Are repeated, and the blue (B) and the green (G) are located in the fourth and eighth columns (C4, C8) of the second and sixth lines (L2, L6) so as to be diagonally positioned from the red (R) light emitting diodes. The light emitting diodes are arranged repeatedly.

In addition, blue (B) and green (G) light emitting diodes are positioned diagonally from the red (R) light emitting diodes in the fourth and eighth lines (L4 and L8) and the fourth and eighth columns (C4 and C8). Are arranged repeatedly, and green (G) and blue (B) are positioned in the second and sixth columns C2 and C6 of the fourth and eighth lines L4 and L8 so as to be diagonally positioned from the red light emitting diodes. The light emitting diodes are arranged repeatedly.

In this case, the light emitting diodes of green (G) and blue (B) repeatedly arranged in the second and sixth lines (L2, L6) and blue (B) repeatedly arranged in the fourth and eighth lines (L4, L8) and It was positioned in the same column as the green (G) light emitting diode.

Then, the green (G) and the blue (B) of the second, fourth column (C2, C4) and the sixth, eighth column (C6, C8) of the second, sixth line (L2, L6) The light emitting diode is one of the red (R) light emitting diodes arranged in the first and third lines (L1 and L3) as well as the third and seventh columns (C3 and C7) of the fifth and seventh lines (L5 and L7). Geometric shapes, that is, rhombus shapes.

In addition, the blue (B) and the green (G) of the second and fourth columns (C2, C4) and the sixth and eighth columns (C6, C8) of the fourth and eighth lines (L4, L8) are repeatedly arranged. The light emitting diode also has a red (R) light emitting diode that is repeatedly arranged in the third and fifth columns C3 and C7 of the fifth and seventh lines L5 and L7 as well as the third and fifth lines L3 and L5. Geometric shapes, that is, rhombus shapes.

As such, when the present invention arranges RGB light emitting diodes in a ratio of 2: 1: 1 in one pixel, two red (R) light emitting diodes and one green (G) and blue (B) pixel are arranged in the pixel. Since the light emitting diodes form a rhombus shape with each other, and the shape of the rhombus is repeated, the color of the image according to the light emission of the RGB light emitting diodes as well as the clarity of the light emitting diodes can be improved.

On the other hand, Figure 4 is another embodiment of the present invention, which is an arrangement structure when the R.G.B light emitting diodes are arranged in a ratio of 1: 1: 1.

That is, in another embodiment of the present invention, in the conventional light emitting diode array structure in which a plurality of R.G.B light emitting diodes for color image representation are arranged in a matrix form in a ratio of 1: 1: 1, as shown in FIG.

For one pixel such that red (R), green (G), and blue (B) light emitting diodes are adjacent to each other so that a triangular shape is repeatedly arranged,

Red (R) and green (G) are used for the odd-column columns C1, C3, C5, C7, C9, C11, C13, C15, and C17 of the first, third, fifth, and seventh lines L1, L3, L5, and L7. ) And blue (B) light emitting diodes are repeated,

Red (R) and green (G) are used for the even-numbered columns C1, C3, C5, C7, C9, C11, C13, C15, and C17 of the second, fourth, sixth, and eighth lines (L2, L4, L6, and L8). ) And the light emitting diodes of blue (B), red (R), and green (G) are repeatedly arranged so as to be located diagonally from the light emitting diodes of () and blue (B).

That is, in another embodiment of the present invention, as shown in Fig. 3, C1, C3, C5, C7, C9, which are odd-column columns of the first, third, fifth, seventh lines (L1, L3, L5, L7), C11, C13, C15, and C17 are arranged such that the light emitting diodes of red (R), green (G), and blue (B) are repeated.

Subsequently, the red (R) and green colors are formed on C2, C4, C6, C8, C10, C12, C14, C16, and C18 which are even columns of the second, fourth, sixth, and eighth lines (L2, L4, L6, and L8). The light emitting diodes of blue (B), red (R), and green (G) are arranged in a diagonal direction from the light emitting diodes (G) and blue (B).

Then, the light emitting diodes of red (R) and green (G) arranged in the first and third columns C1 and C3 of the first line L1 are connected to the second column C2 of the second line L2. The light emitting diodes B arranged in blue form a geometrical shape, that is, a triangular shape, and the shape of the triangle is continuously repeated.

For example, the light emitting diode of blue color B arranged in the second column C2 of the second line L2 may have a red color arranged in the first and third columns C1 and C3 of the first line L1. The light emitting diodes (R) and green (G) have a triangular shape, but emit light of red (R) and green (G) arranged in the first and third columns (C1, C3) of the third line (L3). It is shaped like a diode and a triangle.

In addition, the light emitting diode of blue color B arranged in the second column C2 of the second line L2 has the light emitting diode of red color R arranged in the fourth column C4 of the second line L2. Of course, the light emitting diodes of green color G arranged in the third column C3 of the third line L3 are adjacent to each other to form a triangle shape.

As described above, when the present invention arranges RGB light emitting diodes in a ratio of 1: 1: 1 in one pixel, red (R), green (G), and blue (B) light emission within the pixel. The diodes are formed in a triangular form with each other, and the triangular forms are repeated, so that the color of the image according to the light emission of the RGB light emitting diodes as well as the sharpness thereof can be further improved from the visual point of the electronic display.

On the other hand, the pixel of the R.G.B light emitting diode having the arrangement as described above is to be formed from the following process.

That is, one frame for displaying an image of an electric signboard is composed of two fields, that is, an even field and an odd field.

5 and 6, in the even field, the even field memory alternately reads and displays the horizontal scan line even image information of Line1 and the horizontal scan line odd image information of Line2.

5 and 7, in the odd field, the odd field memory alternately reads and displays horizontal scan line odd image information of Line1 and horizontal scan line even image information of Line2.

Then, as shown in FIG. 8, pixels having a high resolution frame can be formed from alternating expressions of even and odd fields positioned diagonally to each other.

As described above, the pixel forming method of the electronic signboard of the present invention not only arranges the light emitting diodes of RGB for displaying a color image in a geometric pattern, but also has a field in which pixels according to the arranged light emitting diodes are located at diagonal to each other, that is, an even number. It is formed by alternating display of light emitting diodes located in fields and odd fields, so that a high resolution frame can be formed from afterimages of RGB light emitting diodes even if the number of conventional light emitting diodes arranged per unit area of a pixel is the same. In addition, the high resolution frame provides the effect of further improving the color as well as the sharpness of the image.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are within the scope of the claims.

Claims (3)

In a pixel composed of an even field and an odd field frame to represent a color image after arranging a plurality of R.G.B light emitting diodes in a matrix form at a predetermined ratio, The even field is displayed by alternately reading horizontal scan line even image information of Line1 and horizontal scan line odd image information of Line2 in an even field memory. Wherein the odd field is a pixel forming method of the display board, characterized in that the pixel having a high-resolution frame is formed by alternately reading the horizontal scan line odd image information of Line1 and the horizontal scan line even image information of Line2 in the odd field memory. delete delete

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