CN103676174B - Light-emitting diode display 3D display packing - Google Patents

Abstract

The invention provides a kind of light-emitting diode display 3D display packing, relate to field of three-dimensional projection display technology.The method comprising the steps of: S1, size according to unit LEDs plate, the grating of manufactured size coupling; S2, described grating to be arranged on described unit LEDs plate, and described unit LEDs plate is spliced; S3, realize lighting separately of described unit LEDs plate by realizing lighting separately of LED pixel, thus light-emitting diode display 3D is shown.The present invention, by being equipped with separately grating for unit LEDs plate, can solve as large scale light-emitting diode display is equipped with grating problem.

Description

LED display 3D display method

technical field

The invention relates to the technical field of three-dimensional projection display, in particular to a 3D display method of an LED display.

Background technique

As shown in Figure 2, the lenticular grating can display the image information arranged in different spatial positions in different directions, and the naked-eye three-dimensional display can be realized by arranging the parallax images according to the corresponding spatial positions. Through the spatial light modulation of the cylindrical convex lens, the light emitted by the pixels arranged in different spatial positions on the focal plane is emitted in the direction of the line connecting the optical centers, realizing a three-dimensional display. The lenticular grating needs to be tilted at a certain angle to eliminate the moiré fringes formed between the spatial period of the LED pixel and the spatial period of the grating. As shown in Fig. 3, the three-dimensional display of 7 viewpoints can be realized by encoding according to the tilt.

The existing production grating technology, in the aspect of processing multi-viewpoint naked-eye three-dimensional stereo display, usually installs a complete piece of lenticular grating on the display, and the designed synthetic stereogram method is also for the complete grating.

This grating production technology is closely related to the size of the display screen. The requirements for the production of the grating are too high. Due to the size limit of the grating production, it is difficult to produce a matching grating for large-size displays (>=55 inches).

Contents of the invention

(1) Solved technical problems

Aiming at the deficiencies in the prior art, the present invention provides a 3D display method for LED displays, which can solve the problem of equipping large-size LED displays with gratings.

(2) Technical solution

To achieve the above object, the present invention is achieved through the following technical solutions:

A kind of LED display 3D display method, comprises the following steps:

S1. According to the size of the unit LED board, make a grating with matching size;

S2. Installing the grating on the unit LED board, and splicing the unit LED board;

S3. Realize the individual lighting of the unit LED board by realizing the individual lighting of the LED pixels, so that the LED display can be displayed in 3D.

Preferably, the method for realizing the individual lighting of the unit LED panel by realizing the individual lighting of the LED pixels in step S3 is:

S31. Obtain and calculate a pixel coding mask corresponding to the position of the parallax image and the synthesized image of each pixel according to the grating parameters;

S32. Realize the individual lighting of LED pixels according to the pixel encoding mask;

S33. Realize the individual lighting of each small LED board by realizing the individual lighting of the LED pixels.

Preferably, the pixel encoding mask calculated in step S31 to obtain the corresponding relationship between each viewpoint image and the composite image position is:

${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; k</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$

${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; the\; tan</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$

Among them, a is the inclination angle of the grating, d ₁ is the pitch of the grating, d ₂ is the pixel pitch of the LED, d ₃ is the position of the pixel at the apex of the upper left corner of the unit LED board in the grating unit, d ₄ is the thickness of the grating, and d ₅ is the viewing angle Distance; the (i, j)th pixel of the composite image corresponds to the (x, y, m)th pixel of the parallax image of the pixel point; x is the value obtained after rounding x ₃ , and y is i* y ₁ /y ₂ is the value obtained after rounding, m is the viewpoint number, x ₁ is the pixel width of the composite image, x ₂ is the pixel width of the unit LED screen, y ₁ is the pixel height of the composite image, and y ₂ is the pixel of the unit LED panel high.

Preferably, the method for realizing the individual lighting of LED pixels in step S31 is:

By traversing the horizontal pixel value W and the vertical pixel value H of the LED board in the pixel value unit, it is assumed that the (K, L)th board is to be filled with pixels (x, y), and (K, L) represents the Kth horizontal direction block, the L-th unit LED board in the vertical direction; then set the traversal size of the pixel value x to ((K-1)*W, K*W), and the traversal size of the pixel value y to ((L-1) *H, L*H), so as to realize the individual lighting of pixels.

Preferably, after splicing the unit LED boards in step S2, it further includes the step of adjusting the misalignment of grating splicing:

S41, obtain and according to the dpi of the unit LED board, the Lpi of the grating on the unit LED board and the inclination angle a of the grating, calculate the number of pixels Z on the unit LED board covered by the pitch of the grating in the horizontal direction,

The calculation formula is: Z=3*dpi/(Cosα*Lpi);

S42. Calculate the position S of the pixel point (i, j) relative to the leftmost raster in the i-th row,

The calculation formula is: S=j-i*tanα;

Calculate the position S1 of the pixel point (i, j) in the corresponding unit pitch grating according to the position S,

The calculation formula is: S1=R(S/X)*Z;

Calculate the number of pictures PicNum to be filled by the pixel point (i, j) according to the position S1,

The calculation formula is: PicNum=R(S1), where the function R() represents the rounding function;

S43. When a misalignment is detected at the splicing portion of the grating, change the number of pictures filled in the splicing portion by the formula PicNum=R(S1+u) to adapt to the position of the grating, and u is an input adjustable amount.

Preferably, after splicing the unit LED boards in step S2, it further includes a step of adjusting the inclination angle of the grating: obtaining the inclination angle a of the grating on the LED board of the unit, and when it is detected that the inclination angle α of the grating is inconsistent, by adding an input to the inclination angle α, the Adjust v to change the inclination angle to α+v, so that it is consistent with the inclination angle of the grating.

(3) Beneficial effects

The present invention provides a 3D display method for the LED display, by separately equipping the unit LEDs with gratings, and realizing the individual lighting of the LED pixel points to realize the individual lighting of the LED panels, so that the LED display can display in 3D, thereby It can solve the problem of equipping large-size LED displays with gratings.

It solves the problem of distortion of the viewing area caused by the uneven butt joint of the grating plates after splicing, so that the splicing of the gratings can not be misplaced.

Solve the problem of viewing area distortion caused by the mismatch of grating angles after splicing the grating plates, so that the inclination angle of the gratings can be consistent.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flow chart of a 3D display method for an LED display in an embodiment of the present invention;

Fig. 2 is the three-dimensional schematic view of the lenticular grating in the background technology;

Fig. 3 is the oblique grating LED image coding in the background technology;

Figure 4(a) is an LED display after the unit LED boards are separately mounted in the embodiment of the present invention;

Figure 4(b) is a schematic diagram of the individual lighting of the realization unit LED board in the embodiment of the present invention;

Fig. 4(c) is a schematic diagram of realizing individual lighting of pixels in the embodiment of the present invention;

FIG. 5 is a schematic diagram of a pixel coding mask of the corresponding relationship between viewpoint images and composite images in an embodiment of the present invention;

Figure 6(a) is a schematic diagram of grating splicing dislocation in the embodiment of the present invention;

Fig. 6(b) is a schematic diagram of the distortion of the viewing area caused by the misalignment of the grating splicing in the embodiment of the present invention;

Fig. 6(c) is a schematic diagram of the adjusted grating splicing and misalignment in the embodiment of the present invention;

Fig. 7(a) is a schematic diagram of inconsistencies in the tilt angle of the grating in the embodiment of the present invention;

Fig. 7(b) is a schematic diagram of the viewing zone distortion caused by the inconsistency of the inclination angle of the grating in the embodiment of the present invention;

Fig. 7(c) is a schematic diagram of the adjusted grating inclination consistent in the embodiment of the present invention;

Fig. 8(a) is a black and white image of viewing area distortion in the embodiment of the present invention;

Fig. 8(b) is a black-and-white image of consistent viewing areas in the embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1:

As shown in Figure 1, an embodiment of the present invention provides a 3D display method for an LED display, including the following steps:

S1. According to the size of the unit LED board, make a grating with matching size;

S2. Install the grating on the unit LED board, and splice the unit LED board; as shown in Figure 4(a), it is an LED display after the unit LED board in the embodiment of the present invention is individually mounted .

S3. Realize the individual lighting of the unit LED panels by realizing the individual lighting of the LED pixels, so as to make the LED display 3D display.

In this embodiment, by separately equipping the unit LED with a grating, and realizing the individual lighting of the LED pixel points to realize the individual lighting of the unit LED board, the LED display can be displayed in 3D, thereby solving the problem of equipping the large-size LED display with a grating question.

The embodiment of the present invention is described in detail below:

Preferably, the method for realizing the individual lighting of the unit LED panel by realizing the individual lighting of the LED pixels in step S3 is:

S31. Obtain and calculate a pixel coding mask corresponding to the position of the parallax image and the synthesized image of each pixel according to the grating parameters;

The so-called mask means that through weighting operation, multiple parallax images can be generated into a composite image that matches the grating and LED display. This weighting operation is called masking.

S32. According to the pixel encoding mask, realize the individual lighting of LED pixels; as shown in FIG. 4( c ), it is a schematic diagram of realizing individual lighting of pixels in the embodiment of the present invention.

S33. Realize the individual lighting of each small LED board by realizing the individual lighting of the LED pixels. As shown in FIG. 4( b ), it is a schematic diagram of the individual lighting of the LED board of the realization unit in the embodiment of the present invention.

Preferably, the pixel encoding mask calculated in step S31 to obtain the corresponding relationship between each viewpoint image and the composite image position is:

The mask determines which position (x, y) of each parallax image m should be filled in the corresponding position (i, j) of the composite image.

${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; k</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$

${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; the\; tan</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$

Under the above formula, the assigned content of each pixel of the screen is obtained under this parameter. By setting the p-th viewpoint as a white picture and the rest as black, p takes 1-n to obtain the corresponding masks of n viewpoints.

Among them, a is the inclination angle of the grating, d ₁ is the pitch of the grating, d ₂ is the pixel pitch of the LED, d ₃ is the position of the pixel at the apex of the upper left corner of the unit LED board in the grating unit, d ₄ is the thickness of the grating, and d ₅ is the viewing angle Distance; the (i, j)th pixel of the composite image corresponds to the (x, y, m)th pixel of the parallax image of the pixel point; x is the value obtained after rounding x ₃ , and y is i* y ₁ /y ₂ is the value obtained after rounding, m is the viewpoint number, x ₁ is the pixel width of the composite image, x ₂ is the pixel width of the unit LED screen, y ₁ is the pixel height of the composite image, and y ₂ is the pixel of the unit LED panel high. As shown in FIG. 5 , it is a schematic diagram of the pixel encoding mask of the position correspondence between the viewpoint image and the synthesized image in the embodiment of the present invention.

Preferably, the method for realizing the individual lighting of LED pixels in step S31 is:

By traversing the horizontal pixel value W and the vertical pixel value H of the LED board in the pixel value unit, it is assumed that the (K, L)th board is to be filled with pixels (x, y), and (K, L) represents the Kth horizontal direction block, the L-th unit LED board in the vertical direction; then set the traversal size of the pixel value x to ((K-1)*W, K*W), and the traversal size of the pixel value y to ((L-1) *H, L*H), so as to realize the individual lighting of pixels.

Furthermore, due to the splicing of the unit LED boards, the grating will be discontinuous, so that after the light is emitted, the viewing areas generated by the upper and lower boards cannot be continuous, resulting in distortion of the viewing area. The grating splicing diagram is shown in Figure 6 (a). In order to solve this problem, it is necessary to adjust the algorithm of the three-dimensional composite image, so that the filling position of the image changes accordingly according to the misalignment of the cylinder.

Preferably, after splicing the unit LED boards in step S2, it further includes the step of adjusting the misalignment of grating splicing:

S41, obtain and according to the dpi of the unit LED board, the Lpi of the grating on the unit LED board and the inclination angle a of the grating, calculate the number of pixels Z on the unit LED board covered by the pitch of the grating in the horizontal direction,

The calculation formula is: Z=3*dpi/(Cosα*Lpi);

S42. Calculate the position S of the pixel point (i, j) relative to the leftmost raster in the i-th row,

The calculation formula is: S=j-i*tanα;

Calculate the position S1 of the pixel point (i, j) in the corresponding unit pitch grating according to the position S,

The calculation formula is: S1=R(S/X)*Z;

Calculate the number of pictures PicNum to be filled by the pixel point (i, j) according to the position S1,

The calculation formula is: PicNum=R(S1), where the function R() represents the rounding function;

S43. When a misalignment is detected at the splicing portion of the grating, change the number of pictures filled in the splicing portion by the formula PicNum=R(S1+u) to adapt to the position of the grating, and u is an input adjustable amount.

Specifically, first light up the parallax image of the unit LED board, and form a viewing area in space after interacting with the mask, then light up the upper and lower adjacent unit LED boards, and change the masks of different unit LED boards by adjusting u, so that the upper and lower The viewing area formed by the two unit LED boards in space is consistent and not distorted.

The p-th viewpoint is a white picture, and the rest are black, and p is 1-n to obtain the corresponding mask of n viewpoints, as shown in Figure 8(a), when splicing and misalignment in this embodiment, the LED boards of the upper and lower adjacent units Viewport distorts black and white images. Through the algorithm adjustment for the controllable distance proposed in this embodiment, accurate splicing of unit LED boards is not required, thereby realizing the possibility of splicing.

As shown in FIG. 6( b ), it is a schematic diagram of distorted viewing area caused by dislocation of grating splicing in the embodiment of the present invention; as shown in FIG. 6( c ), it is a schematic diagram of dislocation of grating splicing after adjustment in the embodiment of the present invention.

Furthermore, since each unit LED board needs to be separately equipped with a grating, there will be errors during installation, and the main cause of the error is that the inclination angle of each grating board will be different. As shown in Figure 7(a), it shows the inconsistency of the inclination angle of the grating, α and α' are slightly different, and it is difficult to correct through the adjustment of the human eye during installation, but this small difference will have a greater impact on the grating , so it is necessary to improve the algorithm to compensate for the viewport distortion caused by different inclination angles.

After splicing the unit LED boards in step S2, it further includes the step of adjusting the inconsistency of the grating inclination angle: obtain the inclination angle a of the grating on the unit LED board, and when it is detected that the inclination angle α of the grating is inconsistent, add the input adjustable value v to the inclination angle α , change the inclination angle to α+v, so that it is consistent with the inclination angle of the grating.

Specifically, first light up the parallax image of a unit LED board, and form a viewing area in space after interacting with the mask, then light up the upper and lower adjacent unit LED boards, and change the masks of different unit LED boards by adjusting u, so that the upper and lower The viewing areas formed by the two displays in space are consistent and not distorted.

Fig. 7(b) is a schematic diagram of viewing zone distortion caused by inconsistent grating inclination in the embodiment of the present invention; Fig. 7(c) is a schematic diagram of adjusted grating inclination consistent in the embodiment of the present invention.

Specifically, by setting the p-th viewpoint as a white picture and the rest as black, p is set to 1-n to obtain the corresponding mask of n viewpoints, which is called a translucent mask. After the semi-transparent mask passes through the grating, spatial stripes are formed in the space. When the spatial stripes of adjacent LED units are discontinuous, the inclination angle α of the grating can be detected to be inconsistent. As shown in FIG. 8( a ), it is a distorted black and white image of the viewing area in the embodiment of the present invention; as shown in FIG. 8( b ), it is a black and white image of consistent viewing area in the embodiment of the present invention. Through the algorithm adjustment for the controllable inclination angle proposed in this embodiment, the difficulty of splicing is greatly reduced.

It should be noted that the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also Other elements not expressly listed, or inherent to the process, method, article, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. A kind of LED display 3D display method, is characterized in that, comprises the following steps: S1. According to the size of the unit LED board, make a grating with matching size; S2. Installing the grating on the unit LED board, and splicing the unit LED board; S3. Realize the individual lighting of the unit LED board by realizing the individual lighting of the LED pixels, thereby making the LED display 3D display; In step S3, the method for realizing the individual lighting of the unit LED board by realizing the individual lighting of the LED pixels is as follows: S31. Obtain and calculate a pixel coding mask corresponding to the position of the parallax image and the synthesized image of each pixel according to the grating parameters; S32. Realize the individual lighting of LED pixels according to the pixel encoding mask; S33. Realize the individual lighting of each small LED board by realizing the individual lighting of the LED pixels. 2. The method according to claim 1, characterized in that, the pixel encoding mask calculated in step S31 to obtain the corresponding relationship between each parallax image and the composite image position is: ${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; k</span>}}{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; c</span>}\mathrm{<span\; class="notranslate">\; o</span>}\mathrm{<span\; class="notranslate">\; the\; s</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$ ${\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; t</span>}\mathrm{<span\; class="notranslate">\; a</span>}\mathrm{<span\; class="notranslate">\; no</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; ,</span>$ By setting the p-th parallax image as a white picture and the rest as black, p takes 1 to n to obtain the corresponding mask of n parallax images; Among them, α is the inclination angle of the grating, d ₁ is the pitch of the grating, d ₂ is the pixel pitch of the LED, d ₃ is the position of the pixel at the apex of the upper left corner of the unit LED board in the grating unit, d ₄ is the thickness of the grating, and d ₅ is the viewing angle Distance; the (i, j)th pixel of the composite image corresponds to the (x, y, m)th pixel of the parallax image of the pixel point; x is the value obtained after rounding x ₃ , and y is i* y ₁ /y ₂ is the value obtained after rounding, m is the parallax image number, x ₁ is the pixel width of the composite image, x ₂ is the pixel width of the unit LED screen, y ₁ is the pixel height of the composite image, y ₂ is the unit LED board pixel height. 3. LED display 3D display method as claimed in claim 1, is characterized in that, in the step S31, the method for realizing the individual light-up of LED pixel point is: By traversing the horizontal pixel value W and the vertical pixel value H of the pixel value unit LED board, it is assumed that the (K, L) block unit LED board is to be filled with pixels (x, y), and (K, L) represents the horizontal direction The Kth block, the L block unit LED board in the vertical direction; then the traversal size of the pixel value x is set to ((K-1)*W, K*W), and the traversal size of the pixel value y is set to ((L- 1)*H, L*H), so as to realize the individual lighting of pixels. 4. The LED display 3D display method according to claim 1, characterized in that, after splicing the unit LED boards in step S2, further comprising the step of adjusting grating splicing dislocation: S41, obtain and according to the number dpi of pixels per inch of the unit LED board, the number Lpi of the grating units per inch of the grating on the unit LED board and the grating inclination angle α, calculate the grating pitch covered in the horizontal direction The number of pixels Z on the unit LED board, The calculation formula is: Z＝3*dpi/(Cosα*Lpi); S42. Calculate the position S of the pixel point (i, j) relative to the leftmost raster in the i-th row, The calculation formula is: S=j-i*tanα; Calculate the position S1 of the pixel point (i, j) in the corresponding unit pitch grating according to the position S, The calculation formula is: S1=R(S/X)*Z; Calculate the number of pictures PicNum to be filled by the pixel point (i, j) according to the position S1, The calculation formula is: PicNum=R(S1), where the function R() represents the rounding function; S43. When a misalignment is detected at the splicing portion of the grating, change the number of pictures to be filled in the splicing portion by the formula PicNum=R(S1+u) so as to adapt to the position of the grating, where u is an input adjustable amount. 5. The LED display 3D display method according to claim 1, characterized in that, after splicing the unit LED boards in step S2, further comprising the step of adjusting the inconsistent inclination angle of the grating: obtaining the inclination angle α of the grating on the unit LED board, When it is detected that the inclination angle α of the grating is inconsistent, by adding an input adjustable value v to α, it will be changed to α+v to make it suitable for the inclination angle of the grating to be consistent.