A hybrid random structure metal grid generation method for transparent electromagnetic shielding

Abstract

The present application relates to a method for generating a hybrid random structure metal grid for transparent electromagnetic shielding. The method comprises: firstly generating a grid structure of multiple regular polygons arranged periodically in a preset rectangular plane, then generating a ring with the vertex of each regular polygon as the center, and finally arbitrarily offsetting the center position of each ring and randomly changing the radius of each ring to finally generate a ring-polygon hybrid random metal grid structure. In the whole structure pattern generation process, the random variables are superimposed twice, so the randomness of the grid structure pattern obtained in the end is greatly enhanced, so that the moiré fringes can be better eliminated to improve the imaging quality.

Description

Technical Field

[0001] The present application relates to the technical field of transparent conductive and electromagnetic shielding grid structure design, and in particular to a method for generating a hybrid random structure metal grid for transparent electromagnetic shielding. Background Art

[0002] In today's society, various electronic devices have increasing requirements for optoelectronic performance, especially in the field of transparent electromagnetic shielding, which puts forward certain requirements for electromagnetic shielding performance in optically transparent conditions such as cabins, optical sensors, confidential optical observation windows, various transparent touch screens and precision optical lenses. In particular, some precision optical lenses and sensors not only have high requirements for optical transparency and electromagnetic shielding performance, but also require good imaging quality, so the high-order diffraction energy needs to be as low as possible. At present, most transparent shielding materials are based on ITO, but in recent years, with the improvement of processing technology and the development of related theoretical technologies, metal grids have shown strong superiority and are expected to replace ITO.

[0003] Metal grids are interconnected metal grid lines arranged on a two-dimensional azimuth plane and have high light transmittance and a certain level of electromagnetic shielding performance. The structure is generally arranged in regular periodic patterns such as squares, regular hexagons, circular rings, and brick walls. For non-continuous transparent conductive films such as metal grids, due to their regular two-dimensional grid periodic patterns, optical high-order diffraction energy is concentrated along the grid direction to form moiré fringes, which greatly reduces the optical imaging quality. In some precision optical sensors and optical lenses, the imaging quality is very high, which requires measures to reduce or eliminate the influence of high-order diffraction energy. Since the regular shape periodic arrangement of the grid brings about moiré fringes caused by the concentrated distribution of optical high-order diffraction energy, thereby reducing the imaging quality, the generation of moiré fringes can be suppressed by changing or destroying the periodic structural arrangement of the grid.

[0004] Many scholars have conducted in-depth research on eliminating the moiré fringes of metal grids. Some have adopted a variety of nested ring arrangements or multi-periodic structures to reduce the distribution of high-order diffraction energy, but the overall structure is still a periodic structure, so the suppression of moiré fringes has not been fundamentally achieved. Some researchers have also achieved good results in eliminating moiré fringes by generating random quadrilateral / random hexagonal graphic structures to destroy the periodic arrangement to reduce the concentrated distribution of high-order diffraction energy. However, this random quadrilateral / random hexagonal arrangement structure is obtained by randomly controlling the offset of vertices based on regular graphics, so its randomness still needs to be improved. Summary of the invention

[0005] Based on this, it is necessary to provide a method for generating a hybrid random structure metal grid for transparent electromagnetic shielding, which can improve the random distribution of the metal grid pattern and thus suppress the generation of moiré interference fringes, in order to address the above technical problems.

[0006] A method for generating a hybrid random structure metal grid for transparent electromagnetic shielding, the method comprising:

[0007] Generate a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0008] Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings;

[0009] The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

[0010] In one embodiment, the regular polygon is a regular hexagon.

[0011] In one embodiment, generating a grid structure of a plurality of regular polygons with equal number of sides arranged periodically comprises:

[0012] Get the horizontal and vertical dimensions of the rectangular plane and the preset side length of the regular hexagon;

[0013] Calculating the number of vertices of the grid structure in the horizontal direction and the vertical direction in the rectangular plane of the preset size according to the preset side length of the regular hexagon and the horizontal dimension and the vertical dimension of the rectangular plane respectively;

[0014] Calculate the number of vertices in the horizontal direction and the vertical direction to obtain the position coordinates of each vertex of each regular hexagon;

[0015] According to the position coordinates of each vertex, each adjacent vertex is connected to generate a grid structure of multiple regular hexagons with equal numbers of sides arranged periodically.

[0016] In one embodiment, the number of vertices in the horizontal direction of the rectangular plane of the preset size is calculated according to the preset side length of the regular hexagon and the horizontal dimension of the rectangular plane, and the following formula is used to obtain:

[0017] i=abs(Size_l / (1.5l))+1

[0018] The number of vertices in the vertical direction of the rectangular plane of the preset size is calculated according to the preset side length of the regular hexagon and the vertical dimension of the rectangular plane, and the following formula is used to obtain:

[0019]

[0020] In the above two formulas, Size_l is the horizontal size of the rectangular plane, Size_v is the vertical size of the rectangular plane, l is the preset side length of the regular hexagon, i is the number of vertices in the horizontal direction, j is the number of vertices in the vertical direction, and abs() means taking its absolute value.

[0021] In one embodiment, the position coordinates of each vertex of each regular hexagon are obtained by calculating according to the number of vertices in the horizontal direction and the vertical direction. The position coordinates of each vertex of each regular hexagon include: the position of each vertex is a two-dimensional matrix j×i distribution, and the position of each vertex is represented by (p_l ji ,p_v ji ), where p_l ji Represents the horizontal coordinate of the vertex, p_v ji Represents the vertical coordinate of the vertex;

[0022] When the calculated i-th vertex is an odd number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)-l / 4; when the corresponding j is an odd number, the formula is used: p_l ji =1.5l×(i-1)+l / 4;

[0023] When the calculated i-th vertex is an even number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)+l / 4; when the corresponding j is an odd number, the formula is: p_l ji =1.5l×(i-1)-l / 4;

[0024] When calculating the vertical coordinates of the vertex, the formula is used:

[0025] In one embodiment, when circular rings with equal radius are generated with the vertices of the regular polygons in the grid structure as the centers, the radius of the generated circular rings should be less than or equal to half the side length of the regular hexagon.

[0026] In one embodiment, the randomly shifting the center position of each of the circular rings includes randomly shifting the center position in the horizontal direction and the vertical direction, using the following formula:

[0027] sp_l j,i =p_l j,i+0.75×l×(2×rand(1)-1)×factor1 / 2

[0028]

[0029] In the above formula, sp_l ji is the center position of the circle after random horizontal shift, sp_v ji is the center position of the circle after random vertical shift, p_l ji is the horizontal center position before offset, p_v ji is the vertical center position before the shift, rand(1) is a function that generates random values ​​uniformly, factor1 is the center shift coefficient, and the magnitude of the center shift is randomly adjusted by adjusting the magnitude of the shift coefficient.

[0030] In one embodiment, the random change of the radius of each of the circular rings adopts the following formula:

[0031] r0_rand ji =r0 ji ×factor2+r0 ji ×(1-factor2)×rand(1)

[0032] In the above formula, r0_rand ji is the radius size of any circle after random adjustment, rand(1) is a function that generates any value uniformly and randomly, factor2 is the radius scaling factor, and the range of the random circle radius size can be adjusted by adjusting the size of the scaling factor.

[0033] In one embodiment, the random value uniformly generated by the rand(1) function is between 0 and 1;

[0034] The values ​​of the center offset coefficient factor1 and the radius scaling factor factor2 are both between 0 and 1.

[0035] The present application also provides a metal grid structure design device for transparent electromagnetic shielding, the device comprising:

[0036] A regular grid structure generation module is used to generate a grid structure with multiple regular polygons with equal number of sides arranged periodically in a rectangular plane of a preset size;

[0037] A ring-polygon grid structure generation module, used to generate rings with equal radius based on the vertices of each regular polygon in the grid structure as the center, and the rings do not overlap or intersect, and the edges of the regular polygons inside the rings are eliminated;

[0038] The ring-polygon hybrid random mesh structure generation module is used to randomly shift the center position of each ring and randomly change the radius of each ring to generate a ring-polygon hybrid random metal mesh structure.

[0039] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0040] Generate a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0041] Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings;

[0042] The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

[0043] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0044] Generate a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0045] Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings;

[0046] The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

[0047] The above-mentioned mixed random structure metal grid generation method for transparent electromagnetic shielding first generates a grid structure of multiple regular polygons arranged periodically in a preset rectangular plane, then generates a ring with the vertex of each regular polygon as the center, and finally randomly shifts the center position of each ring and randomly changes the radius of each ring to finally generate a ring-polygon mixed random metal grid structure. In the entire generation process, random variables are superimposed twice, so the randomness of the grid structure image obtained in the end is greatly enhanced, which can better eliminate moiré fringes to improve imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1A schematic diagram of a process of designing a metal grid structure in one embodiment;

[0049] Figure 2 A schematic diagram of a regular hexagonal grid pattern generated in one embodiment;

[0050] Figure 3 This is a schematic diagram of a grid pattern of a full-circle ring structure in Example 1;

[0051] Figure 4 A schematic diagram of a grid pattern of a regular circular mixed hexagonal structure in Example 1;

[0052] Figure 5 This is a schematic diagram of a random circular ring mixed regular hexagonal structure grid pattern in Example 2;

[0053] Figure 6 This is a schematic diagram of a random circular ring mixed random hexagonal structure grid pattern in Example 3;

[0054] Figure 7 It is a structural block diagram of a metal grid structure design device in one embodiment;

[0055] Figure 8 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] The interconnected arrangement structure of metal grid lines used in the field of transparent electromagnetic shielding will affect the optical imaging quality. Because when the two-dimensional structure of the metal grid is arranged in a regular periodic pattern such as a square grid, regular hexagon, circular ring, and brick wall, for a non-continuous transparent conductive film such as a metal grid, its regular two-dimensional grid periodic pattern will cause the optical high-order diffraction energy to be concentrated along the grid direction to form moiré fringes, thereby greatly reducing the optical imaging quality.

[0058] In response to the above problems, Figure 1 As shown, the present application provides a method for generating a hybrid random structure metal grid for transparent electromagnetic shielding, comprising the following steps:

[0059] Step S100, generating a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0060] Step S110, generating circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and the edges of the regular polygons inside the circular rings are eliminated;

[0061] Step S120 , randomly shifting the center position of each circular ring, and randomly changing the radius of each circular ring to generate a circular ring-polygon mixed random metal grid structure.

[0062] In the present application, a randomly arranged circular-polygonal hybrid grid structure can be generated through the above steps, and the method in the present application can greatly improve the random distribution of the grid pattern, thereby suppressing the generation of moiré fringes to improve the imaging quality of optical sensors and optical lenses.

[0063] In step 100, a grid structure of a plurality of regular polygons with equal sides arranged periodically is first generated in a rectangular plane of a preset size. The regular polygons may be regular triangles, regular quadrilaterals or regular hexagons. In this article, the regular hexagon is used as an example for description.

[0064] Furthermore, generating a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged includes: obtaining the horizontal dimension, the vertical dimension of the rectangular plane and the preset side length of the regular hexagon, calculating the preset side length of the regular hexagon with the horizontal dimension and the vertical dimension of the rectangular plane to obtain the number of vertices in the horizontal and vertical directions of the grid structure in the rectangular plane of the preset size, calculating according to the number of vertices in the horizontal and vertical directions to obtain the position coordinates of each vertex of each regular hexagon, and connecting adjacent vertices according to the position coordinates of each vertex to generate a grid structure in which a plurality of regular hexagons with equal numbers of sides are periodically arranged.

[0065] In this embodiment, the number of vertices of each regular hexagon in the horizontal direction and the vertical direction of the rectangular plane is obtained by calculation, wherein the number of vertices in the horizontal direction of the rectangular plane of the preset size is obtained according to the preset side length of the regular hexagon and the horizontal dimension of the rectangular plane, using the following formula:

[0066] i=abs(Size_l / (1.5l))+1 (1)

[0067] According to the preset side length of the regular hexagon and the vertical dimension of the rectangular plane, the number of vertices in the vertical direction of the rectangular plane of the preset dimension is calculated using the following formula:

[0068]

[0069] In formula (1) and formula (2), Size_l is the horizontal size of the rectangular plane, Size_v is the vertical size of the rectangular plane, l is the preset side length of the regular hexagon, i is the number of vertices in the horizontal direction, j is the number of vertices in the vertical direction, and abs() means taking the absolute value.

[0070] After calculating the number of vertices in the horizontal and vertical directions of each regular hexagonal network structure in the preset rectangular plane, the position coordinates of each vertex of each regular hexagon can be obtained by calculating the number of vertices in the horizontal and vertical directions according to the position of each vertex distributed in a two-dimensional matrix j×i.

[0071] The coordinates of each vertex are expressed as (p_l ji ,p_v ji ), where p_l ji Represents the horizontal coordinate of the vertex, p_v ji Represents the vertical coordinate of the vertex.

[0072] When the calculated i-th vertex is an odd number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)-l / 4; when the corresponding j is an odd number, the formula is used: p_l ji =1.5l×(i-1)+l / 4;

[0073] When the calculated i-th vertex is an even number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)+l / 4; when the corresponding j is an odd number, the formula is: p_l ji =1.5l×(i-1)-l / 4;

[0074] For example, if you need to calculate the horizontal position coordinates of the first vertex, and the vertical direction is also the horizontal position coordinates of the first vertex, then use the formula p_l ji =1.5l×(i-1)+l / 4; when calculating the horizontal position coordinates of the second vertex in the horizontal direction and the fourth vertex in the vertical direction, the formula p_l is used. ji =1.5l×(i-1)+l / 4.

[0075] The formula is used to calculate the corresponding vertical position coordinates. This formula is only relevant to the vertex position in the vertical direction.

[0076] The above formula can be used to calculate the coordinate position of each vertex in turn, and then the adjacent vertices can be connected to obtain a regular hexagonal grid structure with periodic arrangement such as a honeycomb. Figure 2 shown.

[0077] In step S100, the side width of the regular hexagon may also be set in advance.

[0078] In step S110, circular rings with equal radius are generated with the vertices of the regular hexagons in the grid structure generated in step S100 as the center, and the radius of each circular ring should be less than or equal to half the side length of the regular hexagon.

[0079] Specifically, after the ring is generated, the vertices and lines of the hexagons in the ring are removed, thus forming a ring pattern structure connected by hexagons. In the ring superimposed hexagonal combination structure, all rings do not overlap or intersect, so the radius of all rings is required to be no greater than half of the minimum length of the three adjacent sides, that is: r0≤min(l_1,l_2,l_3) / 2, where l_1, l_2 and l_3 are the lengths of the three adjacent hexagonal sides of the hexagonal vertex at the center of the ring. For a regular hexagon, then: l_1=l_2=l_3=l.

[0080] In step S120, the center position of each ring is randomly offset. The center position is the vertex position of the regular hexagon. When offsetting, random offsets are performed in the horizontal direction and the vertical direction respectively, using the following formula:

[0081] sp_l j,i =p_l j,i +0.75×l×(2×rand(1)-1)×factor1 / 2 (3)

[0082]

[0083] In formula (3) and formula (4), sp_l ji is the center position of the circle after random horizontal shift, sp_v ji is the center position of the circle after random vertical shift, p_l ji is the horizontal center position before the offset (that is, the original hexagon vertex), p_v ji is the vertical center position before the offset (that is, the original hexagon vertex), rand(1) is a function that generates random values ​​uniformly, factor1 is the offset coefficient of the center, and the magnitude of the center offset can be randomly adjusted by adjusting the offset coefficient.

[0084] After the center of each circle is shifted, the shifted center position is obtained, and then the radius of each circle is randomly changed using the following formula:

[0085] r0_rand ji =r0 ji ×factor2+r0ji ×(1-factor2)×rand(1) (5)

[0086] In formula (5), r0_rand ji is the radius of any ring after random adjustment, r0 ji is the initial radius of each ring, rand(1) is a function that generates random values ​​uniformly, factor2 is the radius scaling factor, and the range of the random ring radius can be adjusted by adjusting the scaling factor.

[0087] The initial radius of each ring is r0 ji All satisfy 0<r0 ji ≤min(l_1 ji , l_2 ji , l_3 ji ) / 2, where l_1 ji , l_2 ji and l_3 ji They are the lengths of the three sides connecting the vertices after the hexagon vertices are randomly offset.

[0088] In this embodiment, the random value uniformly generated by the rand(1) function is between 0 and 1, and the values ​​of the center offset coefficient factor1 and the radius scaling factor factor2 are both between 0 and 1. When the center position of each ring is offset and the radius size is adjusted, the randomness of the corresponding grid structure is controlled by controlling the center offset coefficient and the radius scaling factor, which has great flexibility.

[0089] Next, the method is further described using embodiments in conjunction with the accompanying drawings:

[0090] Example 1, in generating Figure 2 After the regular hexagonal grid structure shown, a circular ring structure is superimposed at each vertex position on the basis of the hexagonal structure to form a circular ring-hexagonal hybrid grid structure. Then set the following coefficients:

[0091] Let the offset factor factor1 = 0, and r0 ji =max(r0), radius scaling factor factor2=1.

[0092] This gives us Figure 3 The full-circle regular grid structure pattern shown.

[0093] In addition, let factor1 = 0, and r0 ji =0.8×max(r0), radius scaling factor factor2=1.

[0094] This resulted in Figure 4 The circular-hexagonal mixed regular grid structure pattern shown.

[0095] Embodiment 2:

[0096] In the generation Figure 2 After the regular hexagonal grid structure shown, a circular ring structure is superimposed at each vertex of the hexagonal structure to form a circular ring-hexagonal hybrid grid structure. Then the following coefficients are set:

[0097] Let the offset factor factor1 = 0, and r0 ji =max(r0), radius scaling factor factor2=0.8.

[0098] This resulted in Figure 5 The random rings shown are mixed with regular hexagonal structure grid pattern.

[0099] Embodiment 3:

[0100] In the generation Figure 2 After the regular hexagonal grid structure shown, a circular ring structure is superimposed at each vertex of the hexagonal structure to form a circular ring-hexagonal hybrid grid structure. Then the following coefficients are set:

[0101] Let the offset factor factor1 = 0.9, and r0 ji =min(l_1 ji , l_2 ji , l_3 ji ) / 2, radius scaling factor factor2=0.6.

[0102] This resulted in Figure 6 Shown is a random ring-mixed random hexagonal structure grid pattern.

[0103] The description of the above three embodiments is based on several special cases of generating random patterns of the ring-hexagon hybrid structure, which illustrates the effectiveness of the generation scheme in the invention. It also illustrates that the corresponding hybrid network pattern structure can be generated at will by controlling the coefficient parameters in the invention, which has great flexibility. The above-mentioned ring-hexagon hybrid random structure is only one application aspect of the ring-polygon hybrid random structure grid, and can also be applied to other ring-polygon hybrid random grid structures such as the ring-quadrilateral hybrid random grid structure, and the core principle is the same.

[0104] In the above-mentioned method for generating a hybrid random structure metal grid for transparent electromagnetic shielding, through the above-mentioned method steps, a hexagonal pattern grid with a random vertex position offset can be mixed and superimposed with a random radius ring, and the required random grid pattern of the hybrid structure can be generated by adjusting and controlling the corresponding center offset coefficient and radius scaling factor. Compared with the previous random overlapping ring grid pattern and random quadrilateral / hexagonal grid pattern, a random grid pattern with a random ring and a random polygon mixed and superimposed is proposed for the first time. When the metal grid structure is generated by this method, random variables are superimposed twice, so the randomness of its pattern is greatly enhanced, and the random degree of the corresponding grid pattern is controlled by controlling the offset coefficient and radius scaling factor, which has great flexibility.

[0105] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0106] In one embodiment, Figure 7 As shown, a metal grid structure design device for transparent electromagnetic shielding is provided, comprising: a regular grid structure generation module 200, a ring-polygon grid structure generation module 210 and a ring-polygon mixed random grid structure generation module 220, wherein:

[0107] A regular grid structure generating module 200 is used to generate a grid structure in which a plurality of regular polygons with equal sides are periodically arranged in a rectangular plane of a preset size;

[0108] The ring-polygon grid structure generating module 210 is used to generate rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the rings do not overlap or intersect, and the edges of the regular polygons inside the rings are eliminated;

[0109] The ring-polygon hybrid random mesh structure generating module 220 is used to randomly shift the center position of each ring and randomly change the radius of each ring to generate a ring-polygon hybrid random metal mesh structure.

[0110] For the specific definition of the hybrid random structure metal grid generation device for transparent electromagnetic shielding, please refer to the definition of the hybrid random structure metal grid generation method for transparent electromagnetic shielding above, which will not be repeated here. Each module in the above-mentioned hybrid random structure metal grid generation device for transparent electromagnetic shielding can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0111] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 8 As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for generating a mixed random structure metal grid for transparent electromagnetic shielding is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0112] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0113] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0114] Generate a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0115] Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings;

[0116] The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

[0117] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0118] Generate a grid structure in which a plurality of regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size;

[0119] Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings;

[0120] The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

[0121] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0122] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for generating a hybrid random structure metal grid for transparent electromagnetic shielding, characterized in that: The method comprises: Generate a grid structure in which multiple regular polygons with equal numbers of sides are periodically arranged in a rectangular plane of a preset size, specifically: obtain the horizontal size and vertical size of the rectangular plane and the preset side length of the regular hexagon; The number of vertices in the horizontal and vertical directions of the grid structure in the rectangular plane of the preset size is calculated according to the preset side length of the regular hexagon and the horizontal and vertical dimensions of the rectangular plane, wherein the number of vertices in the horizontal direction is calculated using i=abs(Size_l / (1.5l))+1, and the number of vertices in the vertical direction is calculated using In these two formulas, Size_l is the horizontal size of the rectangular plane, Size_v is the vertical size of the rectangular plane, l is the preset side length of the regular hexagon, i is the number of vertices in the horizontal direction, j is the number of vertices in the vertical direction, and abs() means taking its absolute value: The position coordinates of each vertex of each regular hexagon are calculated according to the number of vertices in the horizontal direction and the vertical direction. Specifically, according to the position coordinates of each vertex, each adjacent vertex is connected to generate a grid structure of multiple regular hexagons with equal number of sides arranged periodically. The position of each vertex is a two-dimensional matrix j×i distribution, and the position of each vertex is expressed as (p_l ji ,p_v ji ), where p_l ji Represents the horizontal coordinate of the vertex, p_v ji Represents the vertical coordinate of the vertex. When the calculated i-th vertex is an odd number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)-l / 4; when the corresponding j is an odd number, the formula is: p_l ji =1.5l×(i-1)+l / 4. When the calculated i-th vertex is an even number and the corresponding j is an even number, the formula is used: p_l ji =1.5l×(i-1)+l / 4; when the corresponding j is an odd number, the formula is: p_l ji =1.5l×(i-1)-l / 4, and when calculating the vertical coordinates of the vertex, the formula is used: Generate circular rings with equal radius based on the vertices of the regular polygons in the grid structure as the center, and the circular rings do not overlap or intersect, and eliminate the edges of the regular polygons inside the circular rings; The center position of each of the circular rings is randomly offset, and the radius of each of the circular rings is randomly changed to generate a circular ring-polygon mixed random metal grid structure.

2. The method for generating a hybrid random structure metal grid according to claim 1, characterized in that: When circular rings with equal radius are generated respectively with the vertices of the regular polygons in the grid structure as the centers, the radius of the generated circular rings should be less than or equal to half the side length of the regular hexagon.

3. The method for generating a hybrid random structure metal grid according to claim 2, characterized in that: The randomly shifting the center position of each of the circular rings includes randomly shifting the center position in the horizontal direction and the vertical direction, using the following formula: sp_l j,i =p_l j,i +0.75×l×(2×rand(1)-1)×factor1 / 2 In the above formula, sp_l ji is the center position of the circle after random horizontal shift, sp_v ji is the center position of the circle after random vertical shift, p_l ji is the horizontal center position before offset, p_v ji is the vertical center position before the shift, rand(1) is a function that generates random values ​​uniformly, factor1 is the center shift coefficient, and the magnitude of the center shift is randomly adjusted by adjusting the magnitude of the shift coefficient.

4. The method for generating a hybrid random structure metal grid according to claim 3, characterized in that: The random change of the radius of each ring adopts the following formula: r0_rand ji =r0 ji ×factor2+r0 ji ×(1-factor2)×rand(1) In the above formula, r0_rand ji is the radius size of any circle after random adjustment, rand(1) is a function that generates any value uniformly and randomly, factor2 is the radius scaling factor, and the range of the radius size of the random circle can be adjusted by adjusting the size of the scaling factor.

5. The method for generating a hybrid random structure metal grid according to claim 4, characterized in that: Any value uniformly randomly generated by the rand(1) function is between 0 and 1; The values ​​of the center offset coefficient factor1 and the radius scaling factor factor2 are both between 0 and 1.

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