CN116741061B

CN116741061B - High-density small-spacing LED (light-emitting diode) spherical screen and design method thereof

Info

Publication number: CN116741061B
Application number: CN202311013266.5A
Authority: CN
Inventors: 曹慧; 刘凤霞; 郑喜凤; 王瑞光; 汪洋; 付饶
Original assignee: Changchun Cedar Electronics Technology Co Ltd
Current assignee: Changchun Cedar Electronics Technology Co Ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-11-14
Anticipated expiration: 2043-08-14
Also published as: CN116741061A

Abstract

A high-density small-space LED spherical screen and a design method thereof belong to the technical field of LED display screens, and particularly relate to the design of LED spherical screen. The problems of easy environmental interference, unstable self brightness, large occupied space of the projection equipment and high manufacturing cost of the existing spherical screen display adopting the projection equipment are solved; and the spherical screen display spliced by the large-dot-pitch LED modules has the problems of strong screen granular feel and obvious splicing gaps. The method comprises the following steps: s1, designing an arrangement area of an LED module on the spherical model; s2, dividing the specification of the LED module; obtaining the use quantity of the LED modules with each specification according to the arrangement area designed on the spherical model and the specifications of the LED modules; s3, according to the arrangement area designed on the spherical model and the specifications of the LED modules, acquiring the size parameters of the LED modules with each specification. The LED spherical screen is mainly used for designing and manufacturing the LED spherical screen.

Description

High-density small-spacing LED (light-emitting diode) spherical screen and design method thereof

Technical Field

The invention relates to the technical field of LED display screens, in particular to a design of an LED spherical screen.

Background

The spherical screen display is a special-shaped display technology, and achieves a richer and vivid display effect by transmitting a picture to be played to a spherical surface for display, so that strong visual impact is given to people. At present, the method is widely applied to scenes such as scientific and technological exhibition, advertising, creative exhibition and the like; the spherical screen display can synchronously and clearly display various video or image-text information to the audience in real time.

Currently, most of common spherical screen displays in the market adopt large screen projection formed by splicing a plurality of projection devices (projectors). The spherical screen display of the projection equipment is easy to be interfered by the environment, such as the brightness of the environment, the placement position of the projector and the selection of a projection light path, so that the final projection effect can be influenced, and if the projection light path is improperly arranged, the user experience can be seriously influenced; moreover, since the projection equipment has the characteristic of unstable brightness, even if the environment is properly arranged, the brightness of the spherical screen display is still lower, so that the visual experience is poor; in addition to the above problems, the conventional spherical screen display has a problem in that the projection apparatus occupies a large space and is expensive.

The existing other type of spherical screen display is generally realized by splicing LED modules into an LED box body and splicing the LED box body into a sphere; such a screen display is also referred to as an LED screen. Currently, the mainstream LED spherical screen in the market is mostly formed by splicing LED lamp panels (modules or boxes) with large dot spacing. The LED spherical screen has strong granular feel and obvious splicing gaps, and can not meet the pursuit of people on 'immersive' visual effects.

With the continuous improvement of LED display technology, the application of miniaturization of pixel units (i.e., high-density and small-pitch LED display) in the high-end field has become an inevitable trend of LED technology development. The high-density small-space LED display has the advantages of high brightness, high definition, high color saturation, wide viewing angle, seamless splicing and the like which are incomparable with the traditional LCD and DLP display; the use of flip-chip integrated packaging technology greatly optimizes the process flow and further improves the display effect. The ball curtain display realized by the high-density small-spacing LED display can achieve more shocking visual effect.

Along with the improvement of the material living standard of the vast consumers and the improvement of the living quality requirement, the audience also puts forward higher requirements on the display effect and quality of the display product, and the spherical screen display realized by adopting the high-density small-space LED display becomes the first choice of people.

Disclosure of Invention

The invention provides a high-density small-space LED spherical screen and a design method thereof, which solve the problems of easy environmental interference, unstable self brightness, large occupied space of projection equipment and high manufacturing cost of the existing spherical screen display adopting projection equipment; and the spherical screen display spliced by the large-dot-pitch LED modules has the problems of strong screen granular feel and obvious splicing gaps.

The invention relates to a design method of a high-density small-space LED spherical screen, which comprises the following steps:

the method comprises the following steps:

s1, establishing a spherical model of an LED spherical screen to be designed, and designing an arrangement area of an LED module on the spherical model;

s2, dividing the specification of the LED module according to the arrangement area designed on the spherical model; obtaining the use quantity of the LED modules with each specification according to the arrangement area designed on the spherical model and the specifications of the LED modules;

s3, according to the arrangement area designed on the spherical model and the specifications of the LED modules, the size parameters of the LED modules with each specification are obtained, and the design of the LED spherical screen to be designed is completed.

Further, a preferred embodiment is provided, in the step S1, a spherical model of the LED spherical screen to be designed is built, and an arrangement area of the LED modules is designed on the spherical model, including:

s1.1, constructing a spherical model with a radius r according to the radius r from the LED spherical screen to be designed to the center of the sphere;

s1.2, dividing the spherical model by adopting longitude lines and latitude lines which are uniformly distributed in a dispersed way to obtain an arrangement area of an LED unit box body and a spherical cap surface LED module; the arrangement area of the LED unit box body is used for arranging rectangular LED modules and right trapezoid LED modules;

S1.3, dividing the arrangement area of the LED unit box body by adopting uniformly and densely distributed latitude lines and equally spaced longitudinally distributed dividing lines to obtain the arrangement areas of the rectangular LED modules and the right trapezoid LED modules.

Further, a preferred embodiment is provided, in the step S1.2, dividing the spherical model by using longitude lines and latitude lines distributed uniformly and dispersing them to obtain an arrangement area of the LED unit box and the spherical cap surface LED module, including:

taking a latitude line positioned at the middle of the spherical model as an equator; the equator divides the sphere into an upper hemisphere and a lower hemisphere;

on each hemisphere, a point formed by intersecting all longitude lines is taken as a pole;

on each hemisphere, taking a spherical area divided by the latitude line closest to the pole as a polar band; the polar band is used for arranging the spherical cap surface LED module; the diameter of the polar band is d;

on each hemisphere, a spherical area divided by any two adjacent longitude lines is used as a spherical lobe; each hemisphere is divided into n spherical petals in total;

on each hemisphere, a spherical area divided by any two adjacent latitude lines is used as a spherical zone; each hemisphere is divided into k spherical bands in total;

On each hemisphere, a spherical area which is divided by any two adjacent longitude lines and any two adjacent latitude lines is used as a box area; the box body area is used for arranging the LED unit box body.

Further, a preferred embodiment is provided, in the step S1.3, the arrangement area of the LED unit case is divided by using uniformly and densely distributed latitude lines and equally spaced and longitudinally distributed dividing lines, so as to obtain the arrangement areas of the rectangular LED modules and the right trapezoid LED modules, including:

the uniform and densely distributed latitude lines and equally-spaced longitudinally distributed dividing lines divide each box body area into a plurality of rows and a plurality of columns of module areas; the module areas in the rows and the columns are symmetrically distributed along the longitudinal axis of each box body area;

each box area is divided into c columns, each column being referred to as a sphere layer; each ball segment comprises m ball layers,；

different column numbers are divided into different box body areas, but each box body area is divided into at least 2 columns;

two module areas symmetrically distributed at two ends of each row are trapezoid module areas; the trapezoid module area is used for arranging the right trapezoid LED modules; in each column of each box region, the other module regions except the trapezoidal module region are rectangular module regions; the rectangular module area is used for arranging the rectangular LED modules.

Further, there is provided a preferred embodiment, in the step S2, dividing the specification of the LED module according to the arrangement area designed on the spherical model, including:

the spherical cap surface LED module comprises 1 specification;

the right trapezoid LED module comprisesSeed specification;

optionally, a spherical lobe is selected, and the specification number of the rectangular LED modules is divided according to the arrangement area of the rectangular module area on the spherical lobe; setting the rectangular LED module to comprise a specifications;

the LED modules in total compriseAnd (5) a specification.

Further, a preferred embodiment is provided, in the step S3, according to the layout area designed on the spherical model and the specifications of the LED modules, the size parameters of the LED modules with each specification are obtained, and the design of the LED spherical screen to be designed is completed, including:

s3.1, acquiring the size parameters of the spherical cap surface LED module and the LED unit box body;

s3.2, acquiring the size parameters of the rectangular LED module;

and S3.3, acquiring the dimension parameters of the right trapezoid LED module.

Further, a preferred embodiment is provided, in the step S3.1, the obtaining the dimensional parameters of the spherical cap LED module and the LED unit case includes:

The saidThe arc center angle of the spherical cap surface LED module isExpressed as: />；

The radial arc center angle of each ball valve isExpressed as: />；

On each spherical lobe, each LED unit box body is an isosceles trapezoid-shaped arc box body; the axial arc center angle and the radial arc center angle of any two LED unit boxes are equal;

the axial arc center angle of each LED unit box body isExpressed as:

；

the axial arc center angle of each sphere layer in each LED unit box body isExpressed as:

；

in each spherical lobe, the upper radial arc length of the LED unit box body arranged at the ith position along the radial direction isThe radial arc length is +.>The expression is as follows: wherein (1)>；

；

。

Further, there is provided a preferred embodiment, in the step S3.2, the obtaining the size parameter of the rectangular LED module includes:

the radial arc center angle of the rectangular LED module isExpressed as: />;

In each of the case regions, the rectangular LED modules arranged at the j-th position in the two-side direction along the vertical axis from the case region have a height ofExpressed as:

；

the joint gap of the rectangular LED module at the j-th position isExpressed as:

。

further, there is provided a preferred embodiment, in the step S3.3, the obtaining the dimension parameter of the right trapezoid LED module includes:

Let hypotenuse of the right trapezoid LED module beThe upper vertex of the bevel edge is +.>The lower vertex of the hypotenuse is +.>The method comprises the steps of carrying out a first treatment on the surface of the The vertical right angle side of the right trapezoid LED module is +.>The upper vertex of the vertical right-angle side is +.>The lower vertex of the vertical right-angle side is +.>The method comprises the steps of carrying out a first treatment on the surface of the The upper top edge of the right trapezoid LED module is +.>The lower bottom edge of the right trapezoid LED module is +.>；

Obtaining the upper vertex of the hypotenuse according to the side line conditions of the sphere layer where the right trapezoid LED module is and the sphere valve where the right trapezoid LED module is locatedAnd the lower vertex of said hypotenuse +.>Is expressed as:

；/>；

the right trapezoid LED module is attached to the rectangular LED module in close proximity; on the rectangular LED modules in close proximity, the attaching edges attached to the right trapezoid LED modules areThe upper top point of the joint edge is +.>The lower vertex of the attaching edge is +.>；

Obtaining the upper vertex of the attaching edge according to the position and the size parameters of the adjacent rectangular LED modulesAnd the lower vertex of the attaching edge +.>Is expressed as:

；/>；

establishing the vertical right angle sideThe upper top margin->Said lower side ∈ ->Is +.>Is a positional relationship expression of:

；

according to the size parameters of the adjacent rectangular LED modules, the upper vertex of the vertical right-angle side is obtained by combining the positional relationship expression And the lower vertex of said vertical right angle side +.>The coordinates of (c) are expressed as follows:

；/>；

and acquiring the lengths of four sides of the rectangular trapezoid LED module according to the coordinates of four vertexes of the rectangular trapezoid LED module, and completing the acquisition of the dimension parameters of the rectangular trapezoid LED module.

The invention also provides a high-density small-space LED spherical screen, which has the following technical scheme:

the high-density small-space LED spherical screen is designed by adopting the design method of the high-density small-space LED spherical screen.

The invention has the following beneficial effects:

1. according to the design method of the high-density small-space LED spherical screen, the spherical model is divided by adopting the uniform warps and wefts, the designed LED spherical screen only needs to use a few types of LED modules, and most of LED modules used for splicing are rectangular and right trapezoid, so that the manufacturing difficulty and the manufacturing cost are low.

2. According to the design method of the high-density small-space LED spherical screen, the spherical model is divided by adopting dense and uniform warps and wefts, gaps among the obtained LED modules are tightly attached, and the splicing gaps of the LED spherical screen are small.

3. According to the design method of the high-density small-space LED spherical screen, the LED spherical screen has higher sphericity and the picture is not easy to distort by acquiring the proper arc center angle and size of the LED module.

4. The design method of the high-density small-space LED spherical screen is used for splicing the LED modules of the LED spherical screen, and the high-density small-space LED display modules can be adopted to reduce the particle feeling of the whole LED spherical screen.

5. According to the design method of the high-density small-space LED spherical screen, the LED spherical screen is formed by splicing the LED modules, projection equipment is not needed, and the LED spherical screen has stable brightness, is not interfered by environment, occupies small space and is low in cost.

The design method of the high-density small-space LED spherical screen is used for designing and manufacturing the LED spherical screen.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a hemisphere 1 of an LED dome screen in a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the warp and weft evenly distributed for evacuation in a preferred embodiment of the present invention;

FIG. 3 is a schematic view showing the division of the ball valve 2 according to the preferred embodiment of the present invention;

FIG. 4 is a schematic view showing the division of the box area 3 according to the preferred embodiment of the present invention;

FIG. 5 is a schematic view of the height of each rectangular LED module in the preferred embodiment of the present invention;

FIG. 6 is a schematic diagram of four vertex coordinates of a rectangular trapezoid LED module according to a preferred embodiment of the present invention;

in the above figures: 1. a hemisphere; 2. ball valve; 3. a box region; 4. a rectangular module area; 5. trapezoidal module area.

Detailed Description

In order to make the technical solution and the advantages of the present invention more clear, the detailed description of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In a first embodiment, referring to fig. 1 to 6, the design method of the high-density small-pitch LED spherical screen is provided in this embodiment, and the specific implementation contents are as follows:

The method comprises the following steps:

In this embodiment, the LED modules include a spherical cap surface LED module, a rectangular LED module, and a right trapezoid LED module; the rectangular LED modules and the right trapezoid LED modules are spliced into an LED unit box body.

In this embodiment, the spherical model is in the shape of a sphere, and the surface of the sphere is a sphere; the spherical cap surface LED module is in a spherical cap surface shape; the rectangular LED module is rectangular; the right trapezoid LED module is in a right trapezoid shape.

In this embodiment, the number of LED modules in each specification is obtained according to the layout area designed on the spherical model and the specifications of the LED modules, which only requires much simpler mathematical operation, and belongs to a conventional technical means, which is not described here again.

In this embodiment, the LED spherical screen uses fewer types of LED (display) modules as much as possible, and uses rectangular modules or right trapezoid modules as much as possible. This is because, in the production process of one LED spherical screen, the fewer the types of LED modules used, the lower the difficulty and complexity of production; meanwhile, in the process of actually manufacturing and producing the LED (display) module, particularly in the production and processing process of the high-density small-space LED display module, the processing difficulty sequence of the LED (display) module with various shapes is as follows: the isosceles trapezoid module is larger than the right trapezoid module and larger than the rectangular module, so that the processing difficulty of the trapezoid module is much higher than that of the rectangular module; the production of the rectangular module can be completed by machine automation completely, and the ideal production efficiency is achieved; and the processing difficulty of the right trapezoid module is slightly worse than that of the rectangular module, but easier than that of the isosceles trapezoid module.

In the second embodiment, the present embodiment is described with reference to fig. 1 to 6, and the method for designing a high-density and small-pitch LED spherical screen according to the first embodiment is further defined in step S1, and the specific implementation contents are as follows:

in the step S1, a spherical model of an LED spherical screen to be designed is established, and an arrangement area of the LED modules is designed on the spherical model, including:

s1.2, dividing the spherical model by adopting longitude lines and latitude lines which are uniformly distributed in a dispersed way to obtain an arrangement area of an LED unit box body and the spherical cap surface LED module; the arrangement area of the LED unit box body is used for arranging the rectangular LED modules and the right trapezoid LED modules;

In this embodiment, the longitude lines and latitude lines of the uniform evacuation distribution may be simply referred to as the longitude lines and latitude lines of the uniform evacuation distribution.

In this embodiment, the distance between two latitudes of the uniformly and densely distributed latitudes is smaller than the distance between two latitudes of the uniformly and densely distributed longitudes.

In this embodiment, the distance between the two dividing lines of the equally spaced and longitudinally distributed dividing lines is smaller than the distance between the two longitude lines of the evenly dispersed longitude and latitude lines.

In the third embodiment, the present embodiment is described with reference to fig. 1 to 6, and the specific implementation details of the step S1.2 in the method for designing a high-density small-pitch LED spherical screen according to the second embodiment are as follows:

in the step S1.2, dividing the spherical model by adopting longitude lines and latitude lines distributed uniformly to obtain an arrangement area of the LED unit box body and the spherical cap surface LED module, including:

taking a latitude line positioned at the middle of the spherical model as an equator; the equator divides the sphere into an upper hemisphere 1 and a lower hemisphere 1;

on each hemisphere 1, a point formed by intersecting all longitude lines is taken as a pole;

on each hemisphere 1, a spherical area divided by the latitude line closest to the pole is taken as a polar zone; the polar band is used for arranging the spherical cap surface LED module; the diameter of the polar band is d;

on each hemisphere 1, a spherical area divided by any two adjacent longitude lines is used as a spherical lobe 2; each hemisphere 1 is divided into n spherical petals 2 in total;

on each hemisphere 1, a spherical area divided by any two adjacent latitude lines is used as a spherical zone; each hemisphere 1 is divided into k spherical bands in total;

On each hemisphere 1, a spherical area which is divided by any two adjacent longitude lines and any two adjacent latitude lines is taken as a box area 3; the box area 3 is used for arranging the LED unit box.

In a fourth embodiment, the present embodiment is described with reference to fig. 1 to 6, and the method for designing a high-density small-pitch LED spherical screen according to the third embodiment is further defined in step S1.3, and the specific implementation contents are as follows:

in step S1.3, dividing the arrangement area of the LED unit box body by using uniformly and densely distributed latitude lines and equally spaced division lines, to obtain the arrangement areas of the rectangular LED modules and the right trapezoid LED modules, including:

the evenly densely distributed latitude lines and equally spaced longitudinally distributed dividing lines divide each box body area 3 into a plurality of rows and a plurality of columns of module areas; the module areas of the rows and the columns are symmetrically distributed along the longitudinal axis of each box area 3;

each box area 3 is divided into c columns, each column being called a sphere layer; each ball segment 2 comprises m ball layers,；

different columns of the box body areas 3 are divided into different columns, but each box body area 3 is divided into at least 2 columns;

Two module areas symmetrically distributed at two ends of each row are trapezoid module areas 5; the trapezoid module area 5 is used for arranging the right trapezoid LED modules; in each column of each box region 3, the other module regions except for the trapezoidal module region 5 are rectangular module regions 4; the rectangular module area 4 is used for arranging the rectangular LED modules.

In this embodiment, since the arrangement area of the rectangular LED modules is divided by using dividing lines that are longitudinally distributed at equal intervals, any two rectangular LED modules have the same width w.

In this embodiment, in each ball layer (layer, row), the widths of any two rectangular module areas 4 are not equal to each other. Each box body area 3 consists of rectangular module areas 4 with equal width and unequal height and trapezoid module areas 5 with different sizes; in the box body area 3, rectangular module areas 4 in the same row (sphere layer, layer) are symmetrically distributed along the sphere from the vertical axis of the box body area 3 to two ends from high to low; in the box body area 3, two trapezoid module areas 5 are symmetrically distributed at two ends of each layer (row and sphere layer), and the trapezoid module areas 5 are used for placing right trapezoid LED modules; right trapezoid LED modules of 2 right trapezoid LED modules in the same row (sphere layer, layer) are mirror symmetrical but belong to different specifications.

In this embodiment, since any two rectangular LED modules have the same width w, and two rectangular LED modules in different ball layers (rows) but in the same column have the same height, two rectangular LED modules in different ball layers (rows) but in the same column have the same specification (i.e., the shape, the size are the same).

In a fifth embodiment, referring to fig. 1 to 6, the present embodiment is a further limitation of step S2 in the method for designing a high-density small-pitch LED spherical screen according to the fourth embodiment, and the specific implementation contents are as follows:

in the step S2, dividing the specification of the LED module according to the arrangement area designed on the spherical model, including:

the spherical cap surface LED module comprises 1 specification;

the right trapezoid LED module comprisesSeed specification;

optionally, a spherical lobe 2 is selected, and the specification number of the rectangular LED modules is divided according to the arrangement area of the rectangular module areas 4 on the spherical lobe 2; setting the rectangular LED module to comprise a specifications;

the LED modules in total compriseAnd (5) a specification.

In this embodiment, the LED spherical screen (or sphere) to be designed is divided into two symmetrical hemispheres 1, and each hemisphere 1 is divided into a polar band for placing the spherical cap LED module; the polar bands of the two hemispheres 1 are identical in shape and size, and the placed spherical cap surface LED modules are identical, so that only one specification is needed for the spherical cap surface LED modules to be adopted for the LED spherical screen to be designed.

In this embodiment, for the LED spherical screen (or spherical model) to be designed, each spherical segment 2 is identical, whether it is an upper hemisphere or a lower hemisphere; the specification number of the LED modules required to be adopted by one spherical segment 2 is the specification number of the LED modules required to be adopted by the LED spherical screen to be designed.

In this embodiment, when the specification of the right trapezoid LED module is divided:

since the angle of the hypotenuses of the two right trapezoid LED modules in the same column in different rows is different, the two right trapezoid LED modules in the same column in different rows belong to different specifications.

In this embodiment, when the right-angle rectangular LED module is specified:

since the two rectangular LED modules in the same column and in different rows have the same height and the same width, the two rectangular LED modules in the same column and in different rows belong to the same specification.

In this embodiment, the specification of the right trapezoid LED module is 2×m, because: the right trapezoid LED modules in the same column in each spherical layer have different specifications (trapezoid angles are different), and each spherical segment 2 has m spherical layers; meanwhile, 2 right trapezoid LED modules positioned on the same sphere layer are mirror symmetry, but belong to different specifications.

In this embodiment, a ball valve 2 is optionally selected, and the specification of the rectangular LED module is divided according to the division result of the rectangular module area 4 on the ball valve 2, specifically: and optionally selecting one spherical valve 2, and obtaining the number of columns of the rectangular module areas 4 divided on each box body area 3 on the spherical valve 2, wherein the sum of the number of columns of the rectangular module areas 4 of all the box body areas 3 on the spherical valve 2 is the specification number of the rectangular LED module.

This is because two rectangular LED modules in different ball layers (rows) but in the same column have the same specification, and one housing area 3 has several columns of rectangular module areas 4 and several specifications of rectangular LED modules.

The rectangular LED modules used in all the box areas 3 included in one ball segment 2 have a plurality of specifications, and the rectangular LED modules used in the ball segment 2 have a plurality of specifications.

In a sixth embodiment, the present embodiment is described with reference to fig. 1 to 6, and the specific implementation details of the step S3 in the method for designing a high-density small-pitch LED spherical screen according to the fifth embodiment are as follows:

in step S3, according to the arrangement area designed on the spherical model and the specifications of the LED modules, the size parameters of the LED modules with each specification are obtained, and the design of the LED spherical screen to be designed is completed, including:

s3.2, acquiring the size parameters of the rectangular LED module;

and S3.3, acquiring the dimension parameters of the right trapezoid LED module.

In a seventh embodiment, referring to fig. 1 to 6, the present embodiment is further defined in step S3.1 in the method for designing a high-density small-pitch LED spherical screen according to the sixth embodiment, and the specific implementation details are as follows:

in step S3.1, obtaining the size parameters of the spherical cap surface LED module and the LED unit box body includes:

the arc center angle of the spherical cap surface LED module isExpressed as: />；

The radial arc center angle of each ball valve 2 isExpressed as: />；

On each spherical lobe 2, each LED unit box body is an isosceles trapezoid-shaped arc box body; the axial arc center angle and the radial arc center angle of any two LED unit boxes are equal;

the axial arc center angle of each LED unit box body isExpressed as:

；

in each spherical segment 2, the upper radial arc length of the LED unit case arranged at the ith position along the radial direction isThe radial arc length is +.>The expression is as follows: wherein (1) >；

；

。

In this embodiment, the radial direction means a direction from the pole to the equator.

An eighth embodiment is described with reference to fig. 1 to 6, and the embodiment is further defined in step S3.2 in the method for designing a high-density small-pitch LED spherical screen according to the seventh embodiment, and the specific implementation contents are as follows:

in the step S3.2, obtaining the size parameter of the rectangular LED module includes:

the radial arc center angle of the rectangular LED module isExpressed as: />;

In each of the case regions 3, the rectangular LED modules arranged at the j-th position in the two-side direction along the vertical axis from the case region 3 have a height ofExpressed as:

；

。

in this embodiment, in each layer (row and sphere layer) of the case region 3, the rectangular LED modules are distributed symmetrically about the vertical axis of the case region 3. The vertical axis divides the box body area 3 into a left half area and a right half area; for a certain half area, along theThe rectangular LED modules are ordered by a method of leading a vertical axis to two sides, wherein the row closest to the vertical axis is at the 1 st position, and the row closest to the vertical axis is at the 2 nd position; the height of the rectangular LED module that is ordered first is higher, as shown in the figure, 。

When in splicing, the left side or right side vertex of the rectangular LED module in the order 1 is attached to the spherical surface of the vertical axis, the left side or right side vertex of the rectangular LED module in the order 2 is attached to the right side or left side of the rectangular LED module in the order 1, and so on.

The rectangular LED modules are positioned in the left half area, and the axial arc center angles corresponding to the left side heights of the rectangular LED modules are consistent with the axial arc center angles of the spherical layers; the right side of the rectangular LED modules in the right half area corresponds to the axial arc center angle of the spherical layer.

In a ninth embodiment, referring to fig. 1 to 6, the present embodiment is further defined in step S3.3 in the method for designing a high-density small-pitch LED spherical screen according to the eighth embodiment, and the specific implementation details are as follows:

in the step S3.3, obtaining the size parameter of the right trapezoid LED module includes:

let hypotenuse of the right trapezoid LED module beThe upper vertex of the bevel edge is +.>The lower vertex of the hypotenuse is +.>The method comprises the steps of carrying out a first treatment on the surface of the The vertical right angle side of the right trapezoid LED module is +.>The upper vertex of the vertical right-angle side is +.>The lower vertex of the vertical right-angle side is +. >The method comprises the steps of carrying out a first treatment on the surface of the The upper top edge of the right trapezoid LED module is +.>The lower bottom edge of the right trapezoid LED module is +.>；

Obtaining the upper vertex of the hypotenuse according to the side line conditions of the sphere layer where the right trapezoid LED module is and the sphere valve 2 where the right trapezoid LED module is locatedAnd the lower vertex of said hypotenuse +.>Is expressed as:

；/>；

；

according to the size parameters of the adjacent rectangular LED modules, the upper vertex of the vertical right-angle side is obtained by combining the positional relationship expressionAnd the lower vertex of said vertical right angle side +.>The coordinates of (c) are expressed as follows:

；/>；

In this embodiment, four vertexes of the right trapezoid LED module are respectively、/>、/>And->The method comprises the steps of carrying out a first treatment on the surface of the Wherein:

the saidAnd->For the right trapezoid LED module, two vertexes of the oblique side are the edge of the sphere layer near the right trapezoid LED module, and are added with the right trapezoid LED module>Is the vertex on the hypotenuse>Is the lower vertex of the bevel edge; said hypotenuse is denoted +>；

The saidAnd->For the right trapezoid LED module, the side far away from the edge of the sphere layer, namely two vertexes of a vertical right angle side is +.>Is vertical right-angle edge vertex->Is the lower vertex of the vertical right-angle side; the vertical right angle side is expressed as。

In this embodiment, the upper vertex of the oblique sideAnd the lower vertex of said hypotenuse +.>The two intersection points of the sphere layer where the right trapezoid LED module is located and the side line of the sphere valve 2 are the intersection points, so that the upper vertex of the hypotenuse can be obtained according to the side line conditions of the sphere layer where the right trapezoid LED module is located and the sphere valve 2>And the lower vertex of said hypotenuse +.>Is defined by the coordinates of (a).

In this embodiment, the positional relationship between the right trapezoid LED module and the rectangular LED module in close proximity includes:

(1) The attaching edgeAnd vertical right angle side->Collinear, i.e.)>；

(2) Upper top edge of right trapezoid LED module Is +.>The vertical direction is set to be perpendicular to the vertical direction,

i.e.；

(3) Lower bottom edge of right trapezoid LED moduleIs +.>The vertical direction is set to be perpendicular to the vertical direction,

i.e.。

In this embodiment, the lengths of the four sides of the rectangular trapezoid LED module may be obtained by coordinates of four vertices of the rectangular trapezoid LED module.

Four vertexes of the right trapezoid LED module, wherein 2 vertexes (namely vertexes of oblique sides) are intersection points of the ball layer and the ball valve 2; the other 2 vertices (i.e., vertices of the vertical right angle side) intersect the edge of the rectangular LED module.

As shown in the figure, at the left side part of the box area 3, two vertexes of the oblique side at the left side of the right trapezoid LED module are intersection points of the sphere layer and the sphere valve 2, and are easy to obtain; the right vertical right angle side of the right trapezoid LED module is aligned with the left side of the rectangular LED module, and two vertexes of the right vertical right angle side of the right trapezoid LED module can be positioned through the rectangular LED module.

The tenth embodiment also provides a high-density small-spacing LED spherical screen, which is implemented as follows:

In an eleventh embodiment, the specific example of designing the spherical screen by using the method for designing the spherical screen with high-density and small-pitch LEDs in this embodiment is as follows:

the sphere curtain radius is r=5m, the sphere curtain is divided into an upper hemisphere and a lower hemisphere, each hemisphere is divided into n=24 petals, each petal (namely, sphere petal 2) is divided into m=24 layers, each layer of structure is internally and bilaterally symmetrical and comprises a rectangular LED modules and right trapezoid LED modules which are bilaterally 2 mirror symmetry, wherein 4 layers are an LED unit box body, and k=6 LED unit box bodies are all arranged; rectangular LED modules in the same column between layers are identical, right trapezoid LED modules in each layer are different, and angles of trapezoids are different. Therefore, the right trapezoid LED module type can be calculated asA block, wherein the two blocks are mirror symmetric; the rectangular LED module is of the type a, and the total module is 49+a.

1. And calculating the size of the LED unit box body.

The radius of the spherical curtain is 5m, the diameter of the top spherical crown surface LED module is 0.5m, each hemisphere is provided with 1 minute of 24 petals, and each petal is divided into 24 LED unit boxes with equal axial and radial arc center angles along the spherical crown surface LED module to the equatorial axis; the LED unit box body is an isosceles trapezoid arc box body.

Calculating the size of the LED unit box:

The radial arc core angle of each ball valve is as follows:；

the arc center angle of the top spherical cap surface LED module is as follows:；

the axial arc center angle of each LED unit box body is as follows:；

along the polar radial direction (from the pole to the equatorial direction), the ith box body is up and down along the radial arc lengthIs (wherein, < >)>）：

Each LED unit box body is divided into c layers with equal height, c=4, and each layer consists of rectangular LED modules with equal width and unequal height and right trapezoid LED modules with different sizes and mirror symmetry; assuming a total of a rectangular LED modules of different heights, the same width:

the axial arc center angle of each sphere layer in each LED unit box body is：/>

；

2. And calculating the size of the rectangular LED module.

The widths of the different rectangular LED modules are the same, and w=90 is set; the centers of all the rectangular LED modules in the same row are aligned if the heights are different; the left side vertex of the rectangular LED module is on the spherical surface, and the right side vertex is overlapped with the left side of the next rectangular LED module; the axial arc center angles corresponding to the left side heights of all the rectangular LED modules are consistent with the axial arc center angles of the display module, and the following sizes of a rectangular LED modules are calculated respectively:

the radial arc core angle of the rectangular LED module is as follows:；

height of longest rectangular LED ModuleThe method comprises the following steps:；

in each of the case regions, the rectangular LED modules arranged at the j-th position in the two-side direction along the vertical axis from the case region have a height of ；

。

And 3, calculating the size of the right trapezoid LED module.

From the figure, two vertexes on the left side of the rectangular trapezoid LED module are the intersection points of the module layer and the spherical lobe, the rectangular trapezoid LED module is easy to obtain, and the right side is aligned with the left side of the rectangular LED module, so that the size of the rectangular trapezoid LED module can be obtained only by locating the coordinates of the two vertexes on the right side of the rectangular trapezoid LED module, and the vertex coordinate solving method is as follows:

as shown in the figure, two vertexes of the left edge of the known right trapezoid LED module are respectivelyThe coordinates of the left top points of the rectangular LED modules are respectively as followsThe right vertex of the right trapezoid LED module is in +.>On the straight line, and the upper edge of the right trapezoid LED module is connected with +.>Perpendicular, set right trapezoid LED module right side summit as +.>The equation can be established according to the following:

solving the equation to obtain the right vertex of the right trapezoid LED moduleThe right trapezoid LED module can be calculated as follows: />

The technical solution provided by the present invention is described in further detail through several specific embodiments, so as to highlight the advantages and benefits of the technical solution provided by the present invention, however, the above specific embodiments are not intended to be limiting, and any reasonable modification and improvement, reasonable combination of embodiments, equivalent substitution, etc. of the present invention based on the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. The design method of the high-density small-space LED spherical screen is characterized by comprising the following steps of:

s3, according to the arrangement area designed on the spherical model and the specifications of the LED modules, obtaining the size parameters of the LED modules with each specification, and completing the design of the LED spherical screen to be designed;

in the step S1, a spherical model of an LED spherical screen to be designed is established, and an arrangement area of an LED module is designed on the spherical model, including the following steps:

2. The method for designing a high-density small-pitch LED spherical screen according to claim 1, wherein in the step S1.2, the spherical model is divided by adopting longitude lines and latitude lines distributed uniformly and evacuated, so as to obtain an arrangement area of an LED unit box body and the spherical cap surface LED module, and the method comprises the following steps:

taking a latitude line positioned at the middle of the spherical model as an equator; the equator divides the sphere into an upper hemisphere (1) and a lower hemisphere (1);

on each hemisphere (1), a point formed by intersecting all longitude lines is taken as a pole;

on each hemisphere (1), taking a spherical area divided by the latitude line closest to a pole as a polar zone; the polar band is used for arranging the spherical cap surface LED module; the diameter of the polar band is d;

on each hemisphere (1), taking a spherical area divided by any two adjacent longitude lines as a spherical lobe (2); each hemisphere (1) is divided into n spherical petals (2);

On each hemisphere (1), taking a spherical area divided by any two adjacent latitude lines as a spherical belt; each hemisphere (1) is divided into a total of k spherical bands;

on each hemisphere (1), a spherical area which is divided by any two adjacent longitude lines and any two adjacent latitude lines is used as a box body area (3); the box region (3) is used for arranging the LED unit box.

3. The method for designing a high-density small-pitch LED spherical screen according to claim 2, wherein in the step S1.3, the arrangement area of the LED unit case is divided by using uniformly densely distributed latitude lines and equally-spaced longitudinally distributed dividing lines, so as to obtain the arrangement areas of the rectangular LED modules and the right trapezoid LED modules, and the method comprises the following steps:

the uniform and densely distributed latitude lines and equally-spaced longitudinally distributed dividing lines divide each box body area (3) into a plurality of rows and a plurality of columns of module areas; the module areas of the rows and the columns are symmetrically distributed along the longitudinal axis of each box body area (3);

each box area (3) is divided into c columns, each column being called a sphere layer; each ball valve (2) comprises m ball layers, ；

Different column numbers are divided into different box body areas (3), but each box body area (3) is divided into at least 2 columns;

two module areas symmetrically distributed at two ends of each row are trapezoid module areas (5); -the trapezoid module area (5) for arranging the right trapezoid LED modules; in each column of each box body area (3), the other module areas except the trapezoid module area (5) are rectangular module areas (4); the rectangular module area (4) is used for arranging the rectangular LED modules.

4. The method for designing a high-density small-pitch LED spherical screen according to claim 3, wherein in the step S2, the specifications of the LED modules are divided according to the arrangement area designed on the spherical model, comprising the steps of:

the spherical cap surface LED module comprises 1 specification;

the right trapezoid LED module comprisesSeed specification;

optionally, a spherical lobe (2) is selected, and the specification number of the rectangular LED modules is divided according to the arrangement area of the rectangular module areas (4) on the spherical lobe (2); setting the rectangular LED module to comprise a specifications;

the LED modules in total compriseAnd (5) a specification.

5. The method for designing a high-density small-pitch LED spherical screen according to claim 4, wherein in the step S3, the size parameters of each size LED module are obtained according to the layout area designed on the spherical model and the size of the LED module, and the design of the LED spherical screen to be designed is completed, comprising the following steps:

S3.1, acquiring the size parameters of the spherical cap surface module and the LED unit box body;

s3.2, acquiring the size parameters of the rectangular LED module;

and S3.3, acquiring the dimension parameters of the right trapezoid LED module.

6. The method for designing a high-density small-pitch LED spherical screen according to claim 5, wherein in step S3.1, the dimensional parameters of the spherical cap face module and the LED unit case are obtained, and the method comprises the following steps:

the arc center angle of the spherical cap surface module isExpressed as: />；

The radial arc center angle of each ball valve (2) isExpressed as: />；

On each spherical lobe (2), each LED unit box body is an isosceles trapezoid arc box body; the axial arc center angle and the radial arc center angle of any two LED unit boxes are equal;

the axial arc center angle of each LED unit box body isExpressed as:

；

in each spherical segment (2), the radial arc length of the upper part of the LED unit box body arranged at the ith position along the radial direction isThe radial arc length is +.>The expression is as follows: wherein (1)>；

；

。

7. The method for designing a high-density small-pitch LED spherical screen according to claim 6, wherein in step S3.2, the dimensional parameters of the rectangular LED modules are obtained, comprising the steps of:

The radial arc center angle of the rectangular LED module isExpressed as: />;

In each case region (3), the height of the rectangular LED modules arranged at the j-th position in the two-side direction along the vertical axis from the case region (3) isExpressed as:

；

。

8. the method for designing a high-density small-pitch LED spherical screen according to claim 7, wherein in the step S3.3, the dimension parameters of the right trapezoid LED module are obtained, comprising the steps of:

Obtaining the upper vertex of the hypotenuse according to the side line conditions of the sphere layer where the right trapezoid LED module is and the sphere valve (2)And the lower vertex of said hypotenuse +.>Is expressed as:

；/>；

the right trapezoid LED module is attached to the rectangular LED module in close proximity; on the rectangular LED modules in close proximity, the attaching edges attached to the right trapezoid LED modules are The upper top point of the joint edge is +.>The lower vertex of the attaching edge is +.>；

；/>；

；

；/>；

9. The high-density small-space LED spherical screen is characterized in that the high-density small-space LED spherical screen is designed by adopting the design method of the high-density small-space LED spherical screen according to any one of claims 1 to 8.