JP4280843B2 - Design method of electromagnetic shielding film and mesh structure pattern thereof - Google Patents

Description

  The present invention relates to an electromagnetic shielding film often used in the field of flat panel displays, particularly for PDP (plasma display), and more particularly to a method for designing a mesh structure pattern of an electromagnetic shielding film.

  Conventionally, an electromagnetic shielding film for shielding electromagnetic waves leaking from the front surface of the display device is mounted as a front plate. On the other hand, a plasma display panel (hereinafter referred to as “PDP”), which has been developed as a large flat display device, has a larger electromagnetic wave leaking from its front surface than a conventional cold cathode ray tube (CRT). Development of an electromagnetic shielding film that can shield electromagnetic waves more effectively is desired.

  In order to remove electromagnetic waves from an electronic device that generates an electromagnetic wave, the surroundings are usually covered with a conductive material, the electromagnetic wave is absorbed, and shielded (shielded) by flowing it to the ground with an earth. In a display such as a PDP, a standard is set so that electromagnetic waves do not directly hit the human body for a predetermined amount or more. In addition, in the display, the shielding method must be transparent because of the nature of displaying an image. Therefore, transparent conductive materials such as ITO have been studied.

  For example, an electromagnetic shielding film in which a conductive lattice pattern and a conductive layer are laminated and provided on a transparent substrate has been proposed (Japanese Patent Laid-Open No. 57-154898). As the layer, a composite oxide (hereinafter referred to as “ITO”) layer of indium oxide and tin oxide or a metal layer is used alone, so this electromagnetic shielding film was used as a front plate for PDP. In some cases, the visible light transmittance tends to decrease or the reflectance increases as a result. In addition, since the conductive lattice pattern and the conductive layer are laminated in contact with each other inside the transparent substrate, the surface of the electromagnetic shield film is separately reflected to reduce the surface reflection of visible light from the electromagnetic shield film. It was also necessary to provide a prevention layer. That is, there is a dilemma that light transmission becomes worse when ITO or the like is applied thickly. Usually, it is desired that the amount of transmitted light is 90% or more, but for ITO, it is 60% or less. In addition, a film of ITO or the like is expensive because it is formed by a thin film manufacturing method such as a sputtering method or a vapor deposition method, and an alternative is desired in terms of cost.

  An alternative method is a metal mesh method. Usually, in the metal mesh method, a metal thin film is formed on the entire surface of a plastic film substrate by electroless plating or vapor deposition, and then unnecessary portions of the metal thin film are removed by etching using photolithography using a photoresist. Is taken. When a metal thin film such as copper is formed in a mesh shape, there is an advantage that the conductivity is larger by one digit or more than a solid coating method such as ITO. In other words, the shielding property is better. However, it is not easy to secure light transmittance even by the metal mesh method. By reducing the line width, a transmittance of 90% or more is secured.

  The pitch of the mesh pattern that is easily absorbed varies depending on the wavelength of the electromagnetic wave. In general, since the wavelength width emitted from the display is wide, there is a possibility that a wavelength band that cannot be sufficiently absorbed may appear at a constant pitch. In that sense, it is considered that the pattern pitch needs to be changed to some extent.

  The biggest problem with the metal mesh method is the generation of moire fringes. In general, the occurrence of moire fringe is said to be minimal when the mesh pattern forms an angle of 30 degrees with the display scanning line of the PDP. However, when the mesh pattern is regularly arranged in a straight line, It stands out and is unpleasant.

  In order to deal with this problem, in Japanese Patent Laid-Open No. 11-121978, as shown in FIG. 1, the intervals between the vertical lines 2 and the horizontal lines 3 of the mesh pattern 1 are arranged with a certain degree of disorder. However, in this case, since the vertical and horizontal lines are composed of straight lines, the essence is the same as the current structure, and the effect on moire fringe is small.

  In Japanese Patent Application Laid-Open No. 11-150388, as shown in FIG. 2, the mesh pattern 4 is a combination of L-shaped meshes 5. If two mesh patterns are combined, the result is a regular rectangular mesh, which is effective for moire fringe. There seems to be no.

In Japanese Patent Laid-Open No. 2000-114773, a circular mesh 7 is combined with a mesh pattern 6 as shown in FIG. Since the arrangement of the edges of the circular mesh is regularly linear in the vertical and horizontal directions, it seems that there is no significant effect on moire fringe. In addition, the difference between the size of the circular mesh and the gap between the circular mesh and the light source is large, which may cause a reduction in the amount of light transmission.
JP-A-57-154898 Japanese Patent Laid-Open No. 11-121978 JP-A-11-150388 JP 2000-114773 A

  As described above, when a mesh structure with a conventional pattern is used, moire fringes appear for cells that are regularly arranged light emitting sources. In order to avoid this, the mesh structure is tilted by 45 degrees with respect to the phosphor cell row so that the moire fringe does not appear as much as possible, but there is still a problem that the moire fringe appears depending on the direction and the image.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method for designing a pattern having a mesh structure free from moire fringe using a computer.

  Another object of the present invention is to provide a program that is executed on a computer when a pattern having a mesh structure that does not produce moire fringe is designed using the computer.

  Still another object of the present invention is to provide an electromagnetic shielding film having a mesh structure pattern in which moire fringes do not appear.

  The inventor makes a moire fringe because the mesh structure of straight copper wires orthogonal to each other has a regular structure, and by making the size or arrangement of the rectangles irregular, each side of each rectangle If the mesh structure is formed of disordered substantially rectangular groups that are not arranged in a straight line with each other, it is found that moire fringes do not appear in cells that are regularly arranged light emitting sources, and the present invention has been made. It was.

  The substantially rectangular group having such a mesh structure can be formed by translating each rectangle vertically and horizontally using random numbers and / or changing the length of each side of each rectangle using random numbers. According to the present invention, such a mesh structure pattern is obtained by calculation by a computer.

  The first aspect of the present invention is an electromagnetic shield film having a mesh structure. The electromagnetic shielding film has a pattern in which a mesh structure is formed by a substantially rectangular group in which approximately rectangular shapes are arranged in two linear directions orthogonal to each other, and each side of each approximately rectangular shape is mutually aligned in two linear directions. It is characterized by not being arranged in a straight line.

A second aspect of the present invention is a method for designing a pattern of a mesh structure of an electromagnetic shielding film used as a front plate of a display device using a computer. This method
A step in which numerical values a and b are input from the input unit to the calculation unit;
A step of creating virtual coordinates composed of an x-coordinate axis and a y-coordinate axis in an arithmetic unit;
In the calculation unit, a virtual rectangle group is formed on the virtual coordinate by a virtual rectangle formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis and having side lengths a and b. Steps,
A translation unit that translates the virtual rectangle in the x-coordinate axis and / or y-coordinate axis direction using a random number read from the storage unit;
And changing the lengths a and b of each side of the translated virtual rectangle by using a random number read from the storage unit to form a substantially rectangular group.

  A third aspect of the present invention is a program for designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device.

An example of this program is
Taking numerical values a and b, and disturbance degrees RXmax, RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0) and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0);
creating virtual coordinates comprising an x-coordinate axis and a y-coordinate axis;
Creating, on the virtual coordinates, a group of virtual rectangles formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis, each of which has a length of a and b.
Introducing two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates, and are parallel to and orthogonal to the x coordinate direction and the y coordinate direction, respectively. The center position of the virtual rectangle (m, n) is defined as (X ₀ (m, n), Y ₀ (m, n) with the intersection of the virtual center lines of the virtual rectangle (1, 1) in one row and one column as the origin. ), The center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
The position of each virtual rectangle in n rows is a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns is the degree of disturbance RXmax. In contrast, the random number RX (m) satisfying RXmax ≧ | RX (m) | is translated in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is relative to the degree of disturbance RYmax. Random numbers RY (m) satisfying RYmax ≧ | RY (m) |, or random numbers RY (n) satisfying RYmax ≧ | RY (n) | ) To obtain the center position (X ₀ ′ (m, n)), (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n),
The coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2
_{YE = Y 0 '(m,} n) -b / 2
_{XF = X 0 '(m,} n) + a / 2
_{YF = Y 0 '(m,} n) + b / 2
Steps to find in
n _i1 = n ₀ + 2i + 1, n _i2 = n ₀ + 2i + 2 (where n ₀ is 0 or any positive integer, i = 0, 1, 2, 3,...), m _j1 = m ₀ + 2j + 1, m _j2 = M ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...) (N indicates n _i1 or n _i2 , and m is m _j1 Or m _j2 ), n = n _i1 rows of odd-numbered (when m ₀ is even) (or even-numbered (when m ₀ is odd)) m = m _j1 columns of virtual rectangles (m _j1 , n _i1 ) is set to a random number RA (m, n) satisfying RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) | with respect to the degree of disturbance RAmax, RBmax. ), RB (m, n), and changing to (1 + RA (m _j1 , n _i1 )) × a, (1 + RB (m _j1 , n _i1 )) × b ,
Change the coordinates of the vertices E and F of the rectangle
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Steps to find in
Using the rectangle defined by the coordinates of the vertices E and F after the change as a reference, n = n _i1 rows, even-numbered columns (when m ₀ is even) (or odd-numbered columns (when m ₀ is odd)) In an m = m _j2 column of virtual rectangles (m _j2 , n _i1 ), only the y-coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
A step of seeking
The x coordinate on the left side of the virtual rectangle (m _j2 , n _i1 ) is the same as the XF of the rectangle on the left (m _j1 , n _i1 ), and the x coordinate on the right side is the rectangle on the right (m _{(j + 1) 1} , N _i1 ) as XE,
In a virtual rectangle (m, n _i2 ) of m = m _j1 or m = m _j2 column that is an even-numbered column or an odd-numbered column of n = n _i2 rows, only the x coordinates of the left and right sides of the virtual rectangle are random numbers RA. Vary with (m, n)
XE = X ₀ ′ (m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
A step of seeking
A step of creating a substantially rectangular shape by extending the left and right sides of the virtual rectangle (m, n _i2 ) up and down and setting the intersections of the horizontal sides of the rectangles in the upper and lower rows as YE and YF as the respective y coordinates. When,
A substantially rectangular shape is created for all integers i and j, and a step of creating a substantially rectangular group is executed.

  In the present invention, each virtual rectangle having a mesh structure of an electromagnetic shielding film attached to a front plate for shielding electromagnetic waves leaking from the front surface of a display device such as an FED (field emission display) such as a PDP or a CRT is provided. Roughly rectangular by making the size or arrangement of the rectangle irregular by translating up and down, left and right according to the random number and / or transforming the length of each side of each virtual rectangle using the random number By creating a mesh structure having a pattern made up of a substantially rectangular group in which the sides of each are not arranged in a straight line, it is possible to provide an electromagnetic shield film in which moire fringes do not appear for cells that are regularly arranged light emitting sources. .

  FIG. 4 shows the basic configuration of a computer that implements the electromagnetic shielding film mesh structure designing method of the present invention. The computer 10 includes a calculation unit (CPU) 12, a storage unit 14, an input unit 16, and an output unit 18. Formation of the pattern of the mesh structure of the electromagnetic shielding film is executed by the arithmetic unit based on a random number and a program stored in the storage unit.

  FIG. 5 is a functional block diagram of the calculation unit 12. The calculation unit 12 includes a virtual rectangle group creation unit 20 that creates a virtual rectangle group on virtual coordinates, a random number generation unit 22, a parallel movement processing unit 24 that translates the virtual rectangle, and the side length of the virtual rectangle. The length change processing unit 26 is changed.

Before describing the processing by the computer, the requirements for the pattern design of the mesh structure will be described.
(1) Introduction of virtual coordinates When designing a pattern of a mesh structure with a computer, virtual coordinates including an x coordinate axis and a y coordinate axis are introduced. On this virtual coordinate, a rectangle to be designed is created by a straight line parallel to the x coordinate axis and a straight line parallel to the y coordinate axis. The length of the rectangle in the x coordinate axis direction is a, and the length in the y coordinate axis direction is b. The rectangle may be either a square (a = b) or a rectangle (a ≠ b).

  Hereinafter, in this specification, the original rectangle created on the virtual coordinates is referred to as a virtual rectangle, and such a set of virtual rectangles is referred to as a virtual rectangle group.

  In the virtual rectangle group, the rectangles are arranged in a matrix (row (x coordinate axis direction) × column (y coordinate axis direction) matrix), and a virtual rectangle of n rows and m columns (n and m are positive integers) is defined as a rectangle (m , N).

In the following description, for the sake of convenience, expressions such as the horizontal direction and the vertical direction are used. The horizontal direction means the x coordinate axis direction, and the vertical direction means the y coordinate axis direction.
(2) Introduction of Disturbance Degree In the design method of the present invention, when a virtual rectangle is translated and / or the length of a side is changed, a random number is used. In order to limit the maximum absolute value of such random numbers, the concept of degree of disturbance is introduced.

In the present invention, a maximum of four types of turbulence are introduced. The degree of disturbance RAmax and RBmax of the side length of each virtual rectangle is defined as follows. The horizontal side length (length in the x-coordinate axis direction) and vertical side length (length in the y-coordinate axis direction) of the virtual rectangle are changed by random numbers RA (m, n) and RB (m, n), respectively. receive. Here, 1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0,
RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) |
It is.

  Also, the degree of translational disturbance RXmax, RYmax of the virtual rectangle is defined. Here, 1 ≧ RXmax ≧ 0, ≧ RYmax ≧ 0, a random number defining the left-right translation (in the x-coordinate axis direction) of the rectangle of n rows is RX (n), and the left-right translation of the m-column rectangle is The prescribed random number is expressed as RX (m), and RXmax ≧ | RX (m) |, RXmax ≧ | RX (n) |.

  In addition, a random number defining the vertical translation of the n rows of rectangles (y coordinate axis direction) is represented as RY (n), and a random number defining the vertical translation of the m columns of rectangles is represented as RY (m). Let RYmax ≧ | RY (n) |, Ymax ≧ | RY (m) |.

  Here, if RAmax = RBmax and RXmax = RYmax, the degree of disturbance can be reduced from four types to two types.

As the random number, a random number stored in the storage unit is used. If different random number sequences are used even with the same degree of disturbance, the pattern can be completely different, but the effect is determined by the degree of disturbance, and the same effect can be obtained even if the pattern is different.
(3) Definition of substantially rectangular shape A pattern of a mesh structure can be finally created by translating the virtual rectangle on the virtual coordinates and / or changing the length of the side. The shape of the elements constituting the mesh structure becomes a rectangular shape or a non-rectangular shape by a process of parallel movement and / or change of the side length.

  FIG. 6 shows an example of a non-rectangular shape. It is not an exact rectangle, and when you look closely, the adjacent rectangles overlap. In this specification, the rectangle which comprises a mesh structure, and the thing which is not a rectangle shall be named generically, and shall be called a substantially rectangle. That is, the designed mesh structure pattern is composed of a substantially rectangular set, that is, a substantially rectangular group.

  In the present invention, a process is performed in which a row is first designated, a substantially rectangular shape is created in even or odd columns in the row, and a substantially rectangular shape is created between these roughly rectangular shapes. Since the rows and columns are relative in an orthogonal relationship, the rows and columns are swapped, i.e., the columns are specified first to create an approximate rectangle for even or odd rows in the columns, and these You may pass through the process of producing a substantially rectangle between substantially rectangles. Alternatively, it goes without saying that the definition is the same when the x and y coordinates are interchanged.

Hereinafter, an example of creating a mesh structure pattern by a computer will be described.
(1) Mesh structure creation example 1
Preparation Example 1 is for explaining the outline of the design method of the present invention.

  FIG. 7 shows a flowchart for explaining the processing in the calculation unit 12 in creation example 1.

  A program for creating a pattern and a random number are stored in the storage unit 14 of the computer 10 shown in FIG. From the input unit 16, the values of the lengths a and b of each side of the virtual rectangle, the degree of disturbance RXmax, RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0) and the respective virtual rectangle The degree of disturbance RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0) with respect to the length of the side is input to the calculation unit 12 (step S1).

  In the virtual rectangle group creation unit 20 of the calculation unit 12, the horizontal side length a is determined by the input rectangle sizes a and b using a straight line 32 in the x coordinate axis direction and a straight line 34 in the y coordinate axis direction as shown in FIG. Then, a virtual rectangle group 38 composed of the virtual rectangles 36 having the length b of the vertical side is created (step S2). In FIG. 8, it is assumed that a = b.

  On the other hand, in the random number generation unit 22 of the calculation unit 12, RXmax ≧ | RX (m) |, RXmax ≧ | RX (n) |, RYmax ≧ | RY (n) |, RYmax ≧ | RY depending on the degree of disturbance input. Random numbers RX (m), RX (n), RY (n), RY (m) acting on the rectangle (m, n) satisfying (m) | are read and RAmax ≧ | RA (m, n) | , RBmax ≧ | RB (m, n) |, random numbers RA (m, n) and RB (m, n) acting on the rectangle (m, n) satisfying the condition are read (step S3).

  In the translation processing unit 24 of the computing unit 12, each m-column virtual rectangle is translated left and right with a random number RX (m), or each n-row virtual rectangle is translated left and right with a random number RX (n), And / or the virtual rectangles of each n rows are translated up and down by a random number RY (n), or the virtual rectangles of each m columns are translated up and down by a random number RY (m) (step S4).

  Next, the length change processing unit 26 of the calculation unit 12 uses the random numbers RA (m, n) and RB (m, n) to calculate the length of each side of the translated virtual rectangle as (1 + RA ( m, n)) × a, (1 + RB (m, n)) × b (step S4). Through the above steps, a substantially rectangular group is formed. Such a substantially rectangular group forms a mesh structure pattern.

  In the above example, the parallel movement and the change in the length of the side are performed. However, the substantially rectangular group can be created by performing only the parallel movement or the change in the length.

  If only translation is performed, RAmax = RBmax = 0 may be set.

  When only the side length is changed, RXmax = RYmax = 0.

The same applies to the creation example described below.
(2) Mesh structure creation example 2
The creation example 2 will be described in more detail than the creation example 1.

  FIG. 9 shows a flowchart for explaining the processing in the calculation unit 12 in creation example 2.

The processes from creating virtual coordinates, creating a virtual rectangle group, and generating a random number are the same as in creation example 1.
(A) Introduction of virtual center line As shown in FIG. 10, two orthogonal points that pass through the center position of the virtual rectangle (m, n) on the virtual coordinates and are parallel to the x coordinate axis direction and the y coordinate axis direction, respectively. Virtual center lines 42 and 44 are created (FIG. 9, step S4).

First, with the intersection of the virtual center lines of the rectangle (1, 1) in one row and one column as the origin, the center coordinates (X ₀ (m, n), Y ₀ (m, n) of the virtual rectangle (m, n) )
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
(Step S5).

In the following description, as shown in FIG. 10, the coordinates E (XE, YE) is the upper left vertex of the virtual rectangle (m, n), and F (XF, YF) is the lower right corner of the virtual rectangle (m, n). However, the coordinates E (XE, YE) may be the lower left vertex of the virtual rectangle (m, n) and F (XF, YF) may be the upper right vertex of the virtual rectangle (m, n).
(B) Rectangle translation The position of each virtual rectangle in n rows is a random number RX (n) that satisfies RXmax ≧ | RX (n) |, or the position of each virtual rectangle in m columns is RXmax ≧ | RX (m ) | Is translated to the left and right by a random number RX (m) that satisfies | and / or the position of each rectangle in m columns is a random number RY (m) that satisfies RYmax ≧ | RY (m) | or n rows The position of each rectangle is translated up and down with a random number RY (n) that satisfies RYmax ≧ | RY (n) | (step S6). FIG. 11 shows a state where the virtual rectangle (m, n) is translated.

The center coordinates (X ₀ ′ (m, n), Y ₀ ′ (m, n)) of the translated virtual rectangle (m, n) are obtained (step S7).

When moving left and right in every m columns and moving up and down in each n rows, the center coordinates are
_{X 0 '(m, n)} = a × (n-1) + RX (m) × a
Y ₀ ′ (m, n) = b × (m−1) + RY (n) × b
It can be expressed as.

In addition, when moving left and right every n rows and moving up and down in each m columns, the center coordinates are
_{X 0 '(m, n)} = a × (n-1) + RX (n) × a
Y ₀ ′ (m, n) = b × (m−1) + RY (m) × b
It is expressed. Needless to say, the horizontal movement and the vertical movement can be combined for each row and column.

The coordinates of a pair of opposite vertices of the translated virtual rectangle (m, n) are E (XE, YE) and F (XF, YF), and the coordinates of the position E point and F point are
_{E (X 0 '(m,} n) -a / 2, Y 0' (m, n) -b / 2)
F (X ₀ '(m, n) + a / 2, Y ₀ ' (m, n) + b / 2)
(Step S8).
(C) Changing the length of the side of the translated virtual rectangle Using the random numbers RA (m, n) and RB (m, n), the horizontal and vertical sides of the translated virtual rectangle (m, n) The length of the side is changed (step S9), and the coordinates of point E and F after the change are
_{E (X 0 '(m,} n) - (1 + RA (m, n)) × a / 2, Y 0' (m, n) - (1 + RB (m, n)) × b / 2)
F (X ₀ ′ (m, n) + (1 + RA (m, n)) × a / 2, Y ₀ ′ (m, n) + (1 + RB (m, n)) × b / 2)
(Step S10).

  A substantially rectangular group can be obtained by performing the above parallel translation of the rectangle and changing the length of the sides of the rectangle.

Thereby, the pattern of a mesh structure can be created so that each side of each substantially rectangular shape does not line up mutually linearly.
(3) Mesh structure creation example 3
Creation example 3 is a specific example.

  FIG. 12 is a flowchart for explaining the processing in the calculation unit 12 in creation example 3.

Create virtual coordinates, create a group of virtual rectangles, generate random numbers, create a virtual center line, determine the center coordinates of the virtual rectangle (m, n), translate the virtual rectangle, and translate the virtual The processing from obtaining the center coordinates of the rectangle to obtaining the coordinates of the points E and F is the same as that in the creation example 2.
(A) Change of side length n and m are distinguished as even or odd. Therefore, n _i1 = n ₀ + 2i + 1, n _i2 = n ₀ + 2i + 2 (where n ₀ is 0 or any positive integer, i = 0, 1, 2, 3,...), _{M j1} = m ₀ + 2j + 1, m _j2 = m ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...). n represents n _i1 or n _i2 , and m represents m _j1 or m _j2 .

n = n _i1 rows of odd-numbered (when m ₀ is even) (or even-numbered (when m ₀ is odd)) m = m _j1 translated virtual rectangles (m _j1 , n _i1 ) Is changed using random numbers RA (m, n) and RB (m, n) (step S9), and the coordinates of the E and F points after the change are changed,
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Thus, a substantially rectangular shape (m _j1 , n _i1 ) changed by this is created (step S10).

A substantially rectangular shape (m _j1 , n _i1 ) is created for all i and j. In FIG. 13, the created substantially rectangular shape (m _j1 , n _i1 ) is indicated by a solid line. However, in order to make the figure easy to understand, the case where the length of the side is changed without moving the virtual rectangle is shown.

Based on the approximate rectangle created as described above,
1) Virtual rectangle (m _j2 , n _i1 ) of m = m _j2 columns which are even-numbered columns (when m ₀ is even) (or odd-numbered columns (when m ₀ is odd)) of n = n _i1 rows. ), Only the y-coordinates of the upper and lower sides of the virtual rectangle are changed with a random number RB (m, n) as shown in FIG.
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
Is obtained (step S11). In FIG. 14, the changed upper and lower sides are indicated by thick solid lines.

As shown in FIG. 15, the x coordinate of the left side of the rectangle (m _j2 , n _i1 ) is the same as the XF of the adjacent rectangle (m _j1 , n _i1 ) on the left side, and the x coordinate on the right side is the approximate rectangle on the right side. It is assumed that it is the same as XE of (m _{(j + 1) 1} , n _i1 ) (step S12). In FIG. 15, the changed left and right sides are indicated by thick solid lines.

Through the above processing, a substantially rectangular shape (m _j2 , n _i1 ) is formed.
2) Next, as shown in FIG. 16, the n = n _i2 row is an even-numbered column (when m ₀ is an even number) (or an odd-numbered column (when m ₀ is an odd number)) m = m _j2 For the row rectangle (m _j2 , n _i2 ), change only the x coordinate of the left and right sides of the virtual rectangle with a random number RR (m, n),
XE = X ₀ '(m _j2 , n _i2 ) − (1 + RA (m _j2 , n _i2 )) × a / 2
XF = X ₀ ′ (m _j2 , n _i2 ) + (1 + RA (m _j2 , n _i2 )) × a / 2
Is obtained (step S13). In FIG. 16, the changed left and right sides are indicated by thick solid lines.

The left and right sides of the rectangle (m _j2 , n _i2 ) are extended vertically as shown in FIG. 16, and the intersections of the horizontal sides of the rectangles in the upper and lower rows are the respective y coordinates, YE, YF (step S14).

Through the above processing, a substantially rectangular shape (m _j2 , n _i2 ) is formed. By forming the even-numbered approximate rectangles, the approximate rectangles of the odd-numbered columns (m _j1 , n _i2 ) are automatically determined. In this case, as can be seen from FIG. 16, the left side or the right side, which is the end of the odd-numbered row at the end, is not determined, and a substantially rectangular shape is not created.

  Actually, since the end portion of the produced electromagnetic shield film is cut out and used, there is no problem even if a substantially rectangular shape is not formed at the end portion.

However, when it is necessary to complete a substantially rectangular shape at the end of the design, the left side or the right side may be determined at the x coordinate position of −a / 2 or + a / 2 from the center coordinate.
3) Hereinafter, a substantially rectangular shape is created for all integers i and j (step S13).

By performing the above processing, it is possible to create a mesh structure pattern so that the sides of each substantially rectangular shape do not line up with each other.
(7) Mesh structure creation example 4
Creation example 4 is another specific example.

  FIG. 17A and FIG. 17B are flowcharts for explaining processing in the calculation unit in creation example 4.

Create virtual coordinates, create a group of virtual rectangles, generate random numbers, create a virtual center line, determine the center coordinates of the virtual rectangle (m, n), translate the virtual rectangle, and translate the virtual The processing from obtaining the center coordinates of the rectangle to obtaining the coordinates of the points E and F is the same as that in the creation example 2.
(A) Change of side length n is distinguished as a multiple of 4 plus 1, 2, 3, 4 and m is an even or odd number. Therefore, n _i1 = n ₀ + 4i + 1, n _i2 = n ₀ + 4i + 2, n _i3 = n ₀ + 4i + 3, n _i4 = n ₀ + 4i + 4 (where n ₀ is 0 or any positive integer, i = 0,1, 2, 3,..., _{M j1} = m ₀ + 2j + 1, m _j2 = m ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...). n represents n _i1 , n _i2 , n _i3 or n _i4 , and m represents m _j1 or m _j2 .

n = n _i1 row odd-numbered column (when m ₀ is even) (or even-numbered column (when m ₀ is odd)) m = m _j1 column rectangle (m _j1 , n _i1 ) The length is changed as shown in FIG. 18 using random numbers RA (m, n) and RB (m, n) (step S9), and the coordinates of the changed points E and F are
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Thus, a substantially rectangular shape (m _j1 , n _i1 ) changed thereby is created (step S10). In FIG. 18, the substantially rectangular shape (m _j1 , n _i1 ) created is shown by a solid line. However, in order to make the figure easy to understand, the case where the length of the side is changed without moving the virtual rectangle is shown.

Based on the approximate rectangle created as described above,
1) In an n = n _i1 row, m = m _j2 column rectangles (m _j2 , n _i1 ) which are even-numbered columns (when m ₀ is even) (or odd-numbered columns (when m ₀ is odd)) On the other hand, as shown in FIG. 19, only the y-coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
Is obtained (step S11). In FIG. 19, the changed upper and lower sides are indicated by thick solid lines.

Furthermore, as shown in FIG. 20, the x coordinate of the left side of the rectangle (m _j2 , n _i1 ) is the same as the XF of the substantially rectangular shape (m _j1 , n _i1 ) on the left side, and the x coordinate on the right side is the abbreviated right side. It is assumed that it is the same as the XE of the rectangle (m _{(j + 1) 1} , n _i1 ) (step S12). FIG. 20 shows the changed left and right sides with thick solid lines.

Through the above processing, a substantially rectangular shape (m _j2 , n _i1 ) is formed.
2) Next, an rectangle of m = m _j2 column (m _j2 , n) which is an even-numbered column of n = n _i3 rows (when m ₀ is an even number) (or odd-numbered column (when m ₀ is an odd number)). The side length of _i3 ) is changed using random numbers RA (m, n) and RB (m, n) as shown in FIG. 21 (step S13), and the coordinates of the E and F points after the change are changed. The
XE = X ₀ ′ (m _j2 , n _i3 ) − (1 + RA (m _j2 , n _i3 )) × a / 2
YE = Y ₀ ′ (m _j2 , n _i3 ) − (1 + RB (m _j2 , n _i3 )) × b / 2
_{XF = X 0 '(m j2} , n i3) + (1 + RA (m j2, n i3)) × a / 2
YF = Y ₀ ′ (m _j2 , n _i3 ) + (1 + RB (m _j2 , n _i3 )) × b / 2
Thus, a substantially rectangular shape (m _j2 , n _i3 ) changed by this is created (step S14). In FIG. 21, the created substantially rectangular shape (m _j2 , n _i3 ) is indicated by a solid line. However, in order to make the figure easy to understand, the case where the length of the side is changed without moving the virtual rectangle is shown.

Based on the approximate rectangle created as described above,
3) m = m _j1 column rectangle (m _j1 , n _i3 ) which is an odd-numbered column (when m ₀ is even) (or even-numbered column (when m ₀ is odd)) in n = n _i3 row On the other hand, as shown in FIG. 22, only the y coordinate of the upper and lower sides of the rectangle is changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j1 , n _i3 ) − (1 + RB (m _j1 , n _i3 )) × b / 2
YF = Y ₀ ′ (m _j1 , n _i3 ) + (1 + RB (m _j1 , n _i3 )) × b / 2
Is obtained (step S15). In FIG. 22, the changed upper and lower sides are indicated by thick solid lines.

Further, as shown in FIG. 23, the x coordinate of the left side of the rectangle (m _j1 , n _i3 ) is the same as the XF of the rectangle (m _{(j−1) 2} , n _i3 ) on the left side, and the x coordinate of the right side Is the same as the XE of the approximate rectangle (m _j2 , n _i3 ) on the right (step S16). In FIG. 23, the changed left and right sides are indicated by thick solid lines. In this case, when it is necessary to complete the rectangle at the extreme end, the left side or the right side may be determined at the x-coordinate position of −a / 2 or + a / 2 from the center coordinate.

Through the above processing, a substantially rectangular shape (m _j1 , n _i3 ) is formed.
4) For n _i2 and n _i4 rows, virtual rectangles (m, n _i2 ), (m, n _i4 ) of m = m _j1 columns or m = m _j2 columns which are even-numbered columns or odd-numbered columns of each row respect, as shown in FIG. 24, by changing only the x-coordinate of the left and right sides of the virtual rectangle random RA (m, n), a virtual rectangle _{(m, n i2) XE =} X 0 ' for ( m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
XE = X ₀ '(m, n _i4 ) − (1 + RA (m, n _i4 )) × a / 2 for the virtual rectangle (m, n _i4 )
XF = X ₀ '(m, n _i4 ) + (1 + RA (m, n _i4 )) × a / 2
Is obtained (step S17). In FIG. 24, the changed left and right sides are indicated by thick solid lines.

The left and right sides of the rectangles (m _j2 , n _i2 ) and (m _j2 , n _i4 ) are extended vertically, and the intersections of the horizontal sides of the rectangles in the upper and lower rows are set as the respective y coordinates, YE, YF ( Step S18).

By the processing of the rectangles in the even-numbered columns, substantially rectangles (m _j2 , n _i2 ) and (m _j2 , n _i4 ) are formed. By forming the even-numbered approximate rectangles, the approximate rectangles of the odd-numbered columns (m _j1 , n _i2 ) and (m _j1 , n _i4 ) are automatically determined.
5) Hereinafter, a substantially rectangular shape is created for all integers i and j (step S19).

  By performing the above processing, it is possible to create a mesh structure pattern so that the sides of each substantially rectangular shape do not line up with each other.

FIG. 25 shows an example of creating a mesh structure pattern in accordance with creation example 4. The degree of disturbance used here is
RXmax = 0.7, RYmax = 0.7
RAmax = 0.3, RBmax = 0.3
It is. As can be seen from FIG. 25, when viewed from either the x-coordinate axis direction or the y-coordinate axis direction, the approximate rectangles are not arranged in a straight line, and the sizes of the approximate rectangles vary depending on the degree of variation. .

  In this creation example, a process is performed in which a row is specified first, a substantially rectangular shape is created in even or odd columns in the row, and a substantially rectangular shape is created between these roughly rectangular shapes. Since the rows and columns are relative in an orthogonal relationship, the rows and columns are swapped, i.e., the columns are specified first to create a rectangle for even or odd rows in the columns, and these abbreviations. You may pass through the process of producing a substantially rectangle between rectangles.

  Before describing the examples, a general method for producing an electromagnetic shielding film will be described.

The electromagnetic shield film can be roughly divided into the following two methods: an electrodeposition method (plating) and an etching method, and a direct method and a transfer method, respectively.
1) Electrodeposition method—direct method In this method, electrodeposition is performed according to the following procedure.
(I) A desired pattern of the mesh structure of the electromagnetic shielding film made according to the present invention is made with a resist or the like on a transparent conductive substrate.
(Ii) A conductive pattern is formed by electrodeposition by dipping in a metal electrolyte used for the electromagnetic shielding film. This conductive pattern forms a mesh structure of the electromagnetic shielding film.
(Iii) If the surface of the electron shield film has a metallic luster, the visibility deteriorates during visual observation of the screen, so the metal surface is blackened.
2) Electrodeposition method-transfer method This method is shown in FIG.
(I) A desired pattern of the mesh structure of the electromagnetic shielding film prepared according to the present invention is formed on the conductive substrate 60 with the insulating resist 62.
(Ii) A metal pattern 64 is formed by electrodeposition by immersing in a metal electrolyte used for the electromagnetic shielding film.
(Iii) A conductive substrate coated with a transparent adhesive 66 on one surface is adhered to a transparent conductive substrate 68 that has been electrodeposited. Here, the transparent adhesive 66 adheres well to metal, but it is preferable to select a resist having poor adhesion.
(Iv) Thereafter, as shown in FIG. 26, the transparent conductive substrate 68 is peeled from the conductive substrate 60 with the metal pattern 64 adhered to the transparent conductive substrate 68 side.

Through the above steps, an electromagnetic shielding film is formed.
3) Etching method-direct method This method is shown in FIG.
(I) On the transparent insulating substrate 70 (for example, a glass substrate), a metal layer 72 is laminated on the entire surface by plating.
(Ii) An etching resist pattern 74 is formed on the metal layer 72. This pattern is a mesh structure pattern created according to the present invention.
(Iii) Only the metal layer portion not protected by the resist is removed by etching.
(Iv) A transparent curable acrylic resin is applied and cured to form the protective film 76. It is not always necessary to remove the resist pattern. If carbon black or the like is included in the resist pattern in advance, it has the effect of removing the metallic luster.

Through the above steps, an electromagnetic shielding film is formed.
4) Etching Method-Transfer Method This method is shown in FIG.
(I) A metal layer 82 is bonded on the conductive substrate 80.
(Ii) A pattern having a mesh structure created by the present invention is formed by the etching resist 84.
(Iii) The metal layer 82 is etched to form a metal pattern.
(Iv) Pour adhesive 86 into the pattern.
(V) A transparent conductive film 88 is formed on the adhesive.
(Vi) The metal pattern 82 and the adhesive 86 layer are peeled off from the conductive substrate 80.
(Vii) A transparent protective film 90 is formed on the surface.

Through the above steps, an electromagnetic shielding film is formed.
(Example 1)
In order to investigate the relationship between the degree of disturbance and moire fringe, an electromagnetic shielding film sample was prepared by the following method.

  The electromagnetic shielding film sample was produced by an etching method-direct method. After laminating about 0.1 μm of copper metal film on a glass substrate (effective area 300 mm × 300 mm) by sputtering, make many samples with 20 μm by plating, and create copper patterns according to various disturbances did. The copper pattern was produced by making an etching resist by a normal photoresist method and removing copper from the portion without the resist with a ferric chloride etching solution. The line widths were all 20 μm. An acrylic protective layer was applied on the metal pattern. As the resist, a commercially available negative photoresist (trade name: KOR, Tokyo Ohka Co., Ltd.) was used.

  The electromagnetic shielding film produced as described above was attached to a display, for example, a 43-type PDP. This PDP standard is shown.

・ Screen size: 952mm × 536mm
-1280 (horizontal) x 768 (vertical) pixels-Judgment of 0.930 mm (horizontal) x 0.698 mm (vertical) pixel pitch moire fringe was made visually.
1) When the mesh structure of the electromagnetic shielding film is such that only the position of the rectangle is changed by a random number and the length of the side of the rectangle is not changed, that is, the degree of disturbance R1 = RAmax = RBmax = 0, and RXmax, When only RYmax is changed.
(A) When the direction of each side of the rectangle of the electromagnetic shield film is the same as the direction of the pixel column of the PDP.

When R2 = RXmax = RYmax, a moire fringe could be confirmed when R2 <0.2, but when R2 ≧ 0.4, a moire fringe could not be confirmed when the pixel and the rectangle were arranged. In addition, when 0.2 ≦ R2 <0.4, the presence of moire fringe was unclear. The expression of moire fringe was considered to depend on the type of image.
(B) When the direction of each side of the rectangular mesh structure has an inclination of 30 degrees with respect to the direction of the pixel column of the PDP.

When R2 = RXmax = RYmax, a moire fringe was slightly confirmed when R2 <0.2, but no moire fringe was seen when R2 ≧ 0.3.
2) When the mesh structure of the electromagnetic shielding film is one in which the rectangular position is changed without changing the rectangular position, that is, R2 = RXmax = RYmax = 0, and only RAmax and RBmax are changed. When it is.

When R1 = RAmax = RBmax and the rectangular side of the electromagnetic shield film is parallel to the pixel column of the PDP, moire fringe could be confirmed when R1 <0.1, but when R1 ≧ 0.1, the electromagnetic shield Moire fringes could not be confirmed whether the rectangular sides of the film were parallel to the pixel columns of the PDP or at an angle of 30 degrees.
3) When the mesh structure of the electromagnetic shielding film changes the rectangular position and changes the length of the rectangular side.

If R1 = RAmax = RBmax, R2 = RXmax = RYmax, and R1 ≧ 0.1 and R2 ≧ 0.1, moire fringe could not be confirmed.
4) Disturbance degree and moire fringe The results obtained by the above measurement are shown in FIG. 29 as the relationship between the disturbance degree (R1, R2) and moire fringe.

  Areas with dots are areas where moire fringes cannot be confirmed. In particular, in the vicinity of R1≈0.3 and R2≈0.5, no moire fringe could be confirmed on any screen.

From FIG. 29, R1 / 2 + R2 / 4> 0.075 and R1 <0.9
It can be seen that a moire fringe does not appear in the mesh structure made up of substantially rectangular groups created using the degree of disturbance R1, R2 in the range of.
(Example 2)
Disturbance degree: An electromagnetic shielding film having a mesh structure pattern of R1 = RAmax = RBmax = 0, R2 = RXmax = RYmax = 0.4 was produced by an etching method-direct method. The size of the glass substrate and the PDP used for evaluation were the same as in Example 1. The pattern of the produced electromagnetic shielding film is shown in FIG.

Thus, when the moire fringe was visually observed using the PDP, nothing over a long range was observed.
(Example 3)
Disturbance degree: An electromagnetic shielding film having a mesh structure pattern of R1 = RAmax = RBmax = 0 and R2 = RXmax = RYmax = 0.8 was produced.

The resulting mesh structure pattern was as shown in FIG. In this case, no moire fringe was observed. The angle between the substantially rectangular side of the mesh structure and the pixel column of the PDP was irrelevant. In the case of R1 = 0, the areas of the substantially rectangular shapes are almost the same, so the amount of transmitted light is the same as when there is no degree of disturbance.
(Example 4)
Disturbance degree: An electromagnetic shielding film having a mesh structure pattern of R1 = RAmax = RBmax = 0.4 and R2 = RXmax = RYmax = 0 was produced. The resulting pattern was as shown in FIG.

Under these conditions, the length of the sides of each substantially rectangular shape is changed, so that the difficulty of expressing moire fringe is more effective than when R1 = 0. In this case, the centers of the substantially rectangular shapes are arranged in parallel to the x coordinate axis and the y coordinate axis.
(Example 5)
Disturbance degree: An electromagnetic shielding film having a mesh structure pattern of R1 = 1.0 and R2 = 0 was produced. The resulting pattern was as shown in FIG.

As can be seen in FIG. 33, large and small rectangles are mixed, so there are places where small rectangles exist in particular, and there are places where it looks like black dots in an actual image. However, no moire fringe could be confirmed.
(Example 6)
R1 and R2 were changed at the same time to produce an electromagnetic shield film having a mesh structure pattern of R1 = 0.3 and R2 = 0.5. The resulting pattern was as shown in FIG.

Variations in the size and position of the rectangle were just right, no moire fringes were visible, and no black spots could be confirmed.
(Example 7)
An electromagnetic shielding film having a mesh structure pattern of R1 = R2 = 0.6 was produced. The resulting pattern was as shown in FIG.

  This pattern was arranged so that the size and position of the substantially rectangular shape seemed to have the least correlation, and no moire fringe could be seen and no black spots could be confirmed.

It is a figure which shows the pattern of the mesh structure of the conventional electromagnetic shielding film | membrane. It is a figure which shows the pattern of the mesh structure of the conventional electromagnetic shielding film | membrane. It is a figure which shows the pattern of the mesh structure of the conventional electromagnetic shielding film | membrane. It is a figure which shows the basic composition of a computer. It is a functional block diagram of a calculating part. It is a figure which shows an example of a substantially rectangular shape. It is a figure which shows the flowchart for demonstrating the process in the calculating part in the example 1 of creation. It is a figure which shows a virtual rectangle group. It is a figure which shows the flowchart for demonstrating the process in the calculating part in the example 2 of creation. It is a figure explaining a virtual center line. It is a figure which shows the state which translated the virtual rectangle (m, n). It is a figure which shows the flowchart for demonstrating the process in the calculating part in the example 3 of creation. It is a figure which shows the approximate rectangle used as a reference | standard. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the flowchart for demonstrating the process in the calculating part in the example 4 of creation. It is a figure which shows the flowchart for demonstrating the process in the calculating part in the example 4 of creation. It is a figure which shows the approximate rectangle used as a reference | standard. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the process of preparation of a substantially rectangle. It is a figure which shows the pattern of the mesh structure created according to the example 4 of creation. It is a figure for demonstrating preparation of the electromagnetic shielding film by an electrodeposition-transfer method. It is a figure for demonstrating preparation of the electromagnetic shielding film by an etching method-direct method. It is a figure for demonstrating preparation of the electromagnetic shielding film by an etching method-transfer method. It is a figure which shows R1, R2 area | region where moire fringe did not come out. It is a figure which shows the pattern of the mesh structure created by the method of this invention. It is a figure which shows the pattern of the mesh structure created by the method of this invention. It is a figure which shows the pattern of the mesh structure created by the method of this invention. It is a figure which shows the pattern of the mesh structure created by the method of this invention. It is a figure which shows the pattern of the mesh structure created by the method of this invention. It is a figure which shows the pattern of the mesh structure created by the method of this invention.

Explanation of symbols

1, 4, 6 Mesh structure pattern 10 Computer 12 Calculation unit (CPU)
DESCRIPTION OF SYMBOLS 14 Memory | storage part 16 Input part 18 Output part 20 Virtual rectangle group production part 22 Random number generation part 24 Parallel movement process part 26 Length change process part 32 Straight line of x coordinate axis direction 34 Straight line of y coordinate axis direction 38 Virtual rectangle group 42,44 Virtual Center line

Claims (17)

A method of designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device using a computer,
A step in which numerical values a and b are input from the input unit to the calculation unit;
A step of creating virtual coordinates composed of an x-coordinate axis and a y-coordinate axis in an arithmetic unit;
In the calculation unit, a virtual rectangle group is formed on the virtual coordinate by a virtual rectangle formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis and having side lengths a and b. Steps,
A translation unit that translates the virtual rectangle in the x-coordinate axis and / or y-coordinate axis direction using a random number read from the storage unit;
And changing the lengths a and b of each side of the translated virtual rectangle using a random number read from the storage unit to form a substantially rectangular group in the calculation unit,
A design method for creating a mesh structure pattern in which the sides of each of the substantially rectangular groups of the substantially rectangular group are not arranged in a straight line in the x-coordinate axis and y-coordinate axis directions on the virtual coordinates. The step of translating each virtual rectangle in the x-coordinate and y-coordinate directions using random numbers,
Disturbances RXmax, RYmax (1 ≧ RXmax ≧ 0, 1 ≧ R) from the input unit to the calculation unit
Ymax ≧ 0) is input,
Each m-column rectangle is translated in the direction of the x-coordinate axis with a random number RX (m) that satisfies RXmax ≧ | RX (m) |, or each rectangle of approximately n-th row is RXmax ≧ | RX (n)
Is translated in the x-coordinate axis direction by a random number RX (n) satisfying | and / or a substantially rectangular shape of each n rows is y-coordinated using a random number RY (n) satisfying RYmax ≧ | RY (n) | Either translate in the direction of the standard axis, or make each m-column approximately rectangular shape RYmax ≧ | RY (
m) using a random number RY (m) that satisfies ||
The step of changing the length of each side of each rectangle using a random number,
Disturbance degrees RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ R) from the input unit to the calculation unit
Bmax ≧ 0) is input,
In the calculation unit, the lengths a and b of each side of the virtual rectangle (m, n) (m and n are positive integers) existing in n rows and m columns on the virtual coordinates are set as RAmax ≧ | RA (m , N) |, RBmax ≧
Using random numbers RA (m, n) and RB (m, n) satisfying | RB (m, n) |
RA (m, n)) × a, (1 + RB (m, n)) × b.
The design method according to claim 1. A method of designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device using a computer,
Numerical values a and b, disturbance degrees RXmax and RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0), and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0) from the input unit to the arithmetic unit And a step in which
A step of creating virtual coordinates composed of an x-coordinate axis and a y-coordinate axis in an arithmetic unit;
In the calculation unit, a virtual rectangle group is formed on the virtual coordinate by a virtual rectangle formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis and having side lengths a and b. Steps,
Two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates and are parallel to the x coordinate direction and the y coordinate direction, respectively, at right angles And the center position of the virtual rectangle (m, n) is set to (X ₀ (m, n), Y ₀ ( m, n)), the center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
In the calculation unit, the position of each virtual rectangle in n rows is set to a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns. , The random number RX (m) satisfying RXmax ≧ | RX (m) | with respect to the degree of disturbance RXmax, and parallel translation in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is the degree of disorder RYmax In contrast, the random number RY (m) satisfying RYmax ≧ | RY (m) | or the position of each virtual rectangle in n rows satisfies RYmax ≧ | RY (n) | with respect to the degree of disturbance RYmax. The center position (X ₀ ′ (m, n)) and (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n) is obtained by translation with the random number RY (n) to the y coordinate axis. Steps,
In the calculation unit, coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2, YE = Y 0' (m, n) -b / 2
_{XF = X 0 '(m,} n) + a / 2, YF = Y 0' (m, n) + b / 2
Steps to find in
The length a, b of each side of the virtual rectangle (m, n) translated in the arithmetic unit is set to RAmax ≧ | RA (m, n) |, RBmax ≧ | RB with respect to the degree of disturbance RAmax, RBmax. Using random numbers RA (m, n) and RB (m, n) satisfying (m, n) |, (1 + RA (m, n)) × a, (1 + RB (m, n)) × b Step to change to
In the calculation unit, change the coordinates of the changed vertices E and F of the rectangle.
_{XE = X 0 '(m,} n) - (1 + RA (m, n)) × a / 2,
YE = Y ₀ '(m, n)-(1 + RB (m, n)) × b / 2
_{XF = X 0 '(m,} n) + (1 + RA (m, n)) × a / 2,
YF = Y ₀ ′ (m, n) + (1 + RB (m, n)) × b / 2
Including the step of
A design method for creating a mesh structure pattern in which the sides of each of the substantially rectangular groups of the substantially rectangular group are not arranged in a straight line in the x-coordinate axis and y-coordinate axis directions on the virtual coordinates. A method of designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device using a computer,
Numerical values a and b, disturbance degrees RXmax and RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0), and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0) from the input unit to the arithmetic unit And a step in which
A step of creating virtual coordinates composed of an x-coordinate axis and a y-coordinate axis in an arithmetic unit;
In the calculation unit, a virtual rectangle group is formed on the virtual coordinate by a virtual rectangle formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis and having side lengths a and b. Steps,
Two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates and are parallel to the x coordinate direction and the y coordinate direction, respectively, at right angles And the center position of the virtual rectangle (m, n) is set to (X ₀ (m, n), Y ₀ ( m, n)), the center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
In the calculation unit, the position of each virtual rectangle in n rows is set to a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns. , The random number RX (m) satisfying RXmax ≧ | RX (m) | with respect to the degree of disturbance RXmax, and parallel translation in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is the degree of disorder RYmax In contrast, the random number RY (m) satisfying RYmax ≧ | RY (m) | or the position of each virtual rectangle in n rows satisfies RYmax ≧ | RY (n) | with respect to the degree of disturbance RYmax. The center position (X ₀ ′ (m, n)) and (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n) is obtained by translation with the random number RY (n) to the y coordinate axis. Steps,
In the calculation unit, coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2
_{YE = Y 0 '(m,} n) -b / 2
_{XF = X 0 '(m,} n) + a / 2
_{YF = Y 0 '(m,} n) + b / 2
Steps to find in
N _i1 = n ₀ + 2i + 1, n _i2 = n ₀ + 2i + 2 (where n ₀ is 0 or any positive integer, i = 0, 1, 2, 3,...), _{M j1} = m ₀ + 2j + 1, m _j2 = m ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...) (N indicates n _i1 or n _i2 , m represents m _j1 or m _j2 ), n = n _i1 rows of odd-numbered (when m ₀ is even) (or even-numbered (when m ₀ is odd)) m = m _j1 column virtual rectangle The length of each side of (m _j1 , n _i1 ) is a random number RA that satisfies RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) | with respect to the degree of disturbance RAmax, RBmax. Using (m, n) and RB (m, n), change to (1 + RA (m _j1 , n _i1 )) × a, (1 + RB (m _j1 , n _i1 )) × b. Steps,
In the calculation unit, change the coordinates of the changed vertices E and F of the rectangle.
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Steps to find in
In the arithmetic unit, with the rectangle defined by the coordinates of the vertices E and F after the change as a reference, the even-numbered column (when m ₀ is an even number) of n = n _i1 rows (or the odd-numbered column (m ₀ is an odd number) In the case of m = m _j2 columns of virtual rectangles (m _j2 , n _i1 ), only the y coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
A step of seeking
In the calculation unit, the x coordinate of the left side of the virtual rectangle (m _j2 , n _i1 ) is the same as the XF of the left adjacent rectangle (m _j1 , n _i1 ), and the x coordinate of the right side is the right side rectangle (m _{(j +1) 1} , n _i1 ) the same step as XE;
The x coordinate of the left and right sides of the virtual rectangle in the virtual rectangle (m, n _i2 ) of the even-numbered column or the odd-numbered column of m = m _j1 or m = m _j2 column in the n = n _i2 row in the arithmetic unit. Only with a random number RA (m, n)
XE = X ₀ ′ (m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
A step of seeking
In the calculation unit, the left and right sides of the virtual rectangle (m, n _i2 ) are extended vertically, and the intersections of the horizontal sides of the rectangles in the upper and lower rows are set to YE and YF, which are the respective y-coordinates. The steps of creating
Creating a substantially rectangular shape for all integers of i and j in the computing unit, and creating a substantially rectangular group,
A design method for creating a mesh structure pattern in which the sides of each of the substantially rectangular groups of the substantially rectangular group are not arranged in a straight line in the x-coordinate axis and y-coordinate axis directions on the virtual coordinates. A method of designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device using a computer,
Numerical values a and b, disturbance degrees RXmax and RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0), and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0) from the input unit to the arithmetic unit And a step in which
A step of creating virtual coordinates composed of an x-coordinate axis and a y-coordinate axis in an arithmetic unit;
In the calculation unit, a virtual rectangle group is formed on the virtual coordinate by a virtual rectangle formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis and having side lengths a and b. Steps,
Two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates and are parallel to the x coordinate direction and the y coordinate direction, respectively, at right angles And the center position of the virtual rectangle (m, n) is set to (X ₀ (m, n), Y ₀ ( m, n)), the center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
In the calculation unit, the position of each virtual rectangle in n rows is set to a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns. , The random number RX (m) satisfying RXmax ≧ | RX (m) | with respect to the degree of disturbance RXmax, and parallel translation in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is the degree of disorder RYmax In contrast, the random number RY (m) satisfying RYmax ≧ | RY (m) | or the position of each virtual rectangle in n rows satisfies RYmax ≧ | RY (n) | with respect to the degree of disturbance RYmax. The center position (X ₀ ′ (m, n)) and (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n) is obtained by translation with the random number RY (n) to the y coordinate axis. Steps,
In the calculation unit, coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2
_{YE = Y 0 '(m,} n) -b / 2
_{XF = X 0 '(m,} n) + a / 2
_{YF = Y 0 '(m,} n) + b / 2
Steps to find in
In the calculation unit, n _i1 = n ₀ + 4i + 1, n _i2 = n ₀ + 4i + 2, n _i3 = n ₀ + 4i + 3, n _i4 = n ₀ + 4i + 4 (where n ₀ is 0 or a positive integer, i = 0, 1, 2, 3,..., _{M j1} = m ₀ + 2j + 1, m _j2 = m ₀ + 2j + 2 (where m ₀ is 0 or a positive integer, j = 0, 1, 2, 3,...) (N _Represents n _i1 , n _i2 , n _i3 or n _i4 , m represents m _j1 or m _j2 ), n = n _i1 row, odd-numbered column (when m ₀ is even) (or even-numbered column) (When m ₀ is an odd number)), the length of each side of the virtual rectangle (m _j1 , n _i1 ) of m = m _j1 column is set to RAmax ≧ | RA (m , N) |, RBmax ≧ | RB (m, n) | using random numbers RA (m, n) and RB (m, n) satisfying (1 + RA (m _j1 , n _i1 )) × a, (1 + RB (m _j1 , n _i1 )) × b
In the calculation unit, change the coordinates of the changed vertices E and F of the rectangle.
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Steps to find in
In the calculation unit, with the rectangle defined by the coordinates of the changed vertices E and F as a reference, in the n = n _i1 row, the even-numbered column (m ₀ Is an even number) (or an even-numbered column (when m ₀ is an odd number)), and only the y-coordinates of the upper and lower sides of the virtual rectangle are random numbers RB in m = m _j2 column rectangles (m _j2 , n _i1 ). Vary with (m, n)
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
A step of seeking
In the calculation unit, the x coordinate of the left side of the virtual rectangle (m _j2 , n _i1 ) is the same as the XF of the left adjacent rectangle (m _j1 , n _i1 ), and the x coordinate of the right side is the right side rectangle (m _{(j +1) 1} , n _i1 ) the same step as XE;
In the calculation unit, n = n _i3 rows of even-numbered columns (when m ₀ is even) (or odd-numbered columns (when m ₀ is odd)) m = m _j2 columns of virtual rectangles (m _j2 , n _i3 ) is set to a random number RA (m, n) satisfying RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) | with respect to the degree of disturbance RAmax, RBmax. ), RB (m, n) and changing to (1 + RA (m _j2 , n _i3 )) × a, (1 + RB (m _j2 , n _i3 )) × b;
In the calculation unit, change the coordinates of the changed vertices E and F of the rectangle.
XE = X ₀ ′ (m _j2 , n _i3 ) − (1 + RA (m _j2 , n _i3 )) × a / 2
YE = Y ₀ ′ (m _j2 , n _i3 ) − (1 + RB (m _j2 , n _i3 )) × b / 2
_{XF = X 0 '(m j2} , n i3) + (1 + RA (m j2, n i3)) × a / 2
YF = Y ₀ ′ (m _j2 , n _i3 ) + (1 + RB (m _j2 , n _i3 )) × b / 2
Steps to find in
In the arithmetic unit, with reference to the rectangle defined by the coordinates of the changed vertices E and F, the odd-numbered column of n = n _i3 rows (when m ₀ is even) (or even-numbered column (m ₀ is odd) In the case of m = m _j1 columns of virtual rectangles (m _j1 , n _i3 ) where only the y-coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j1 , n _i3 ) − (1 + RB (m _j1 , n _i3 )) × b / 2
YF = Y ₀ ′ (m _j1 , n _i3 ) + (1 + RB (m _j1 , n _i3 )) × b / 2
A step of seeking
In the calculation unit, the x coordinate of the left side of the virtual rectangle (m _j1 , n _i3 ) is the same as the XF of the rectangle on the left (m _{(j-1) 2} , n _i3 ), and the x coordinate of the right side is the right side The same step as XE of the rectangle (m _j2 , n _i3 ),
In the arithmetic unit, for the n _i2 and n _i4 rows, virtual rectangles (m, n _i2 ), (m, n) of m = m _j1 columns or m = m _j2 columns which are even-numbered columns or odd-numbered columns of each row. _i4 ), only the x-coordinates of the left and right sides of the virtual rectangle are changed by a random number RA (m, n),
For the rectangle (m, n _i2 ), XE = X ₀ ′ (m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
For the rectangle (m, n _i4 ), XE = X ₀ ′ (m, n _i4 ) − (1 + RA (m, n _i4 )) × a / 2
XF = X ₀ '(m, n _i4 ) + (1 + RA (m, n _i4 )) × a / 2
A step of seeking
In the calculation unit, the left and right sides of the virtual rectangles (m _j2 , n _i2 ), (m _j2 , n _i4 ) are extended vertically, and the intersections with the horizontal sides of the rectangles in the upper and lower rows are the respective y coordinates. Creating a substantially rectangular shape by setting YE and YF;
creating a substantially rectangular shape for all integers of i and j and creating a substantially rectangular group,
A design method for creating a mesh structure pattern in which the sides of each of the substantially rectangular groups of the substantially rectangular group are not arranged in a straight line in the x-coordinate axis and y-coordinate axis directions on the virtual coordinates.   The design method according to claim 2, wherein RXmax = 0 and RYmax = 0.   The design method according to claim 2, wherein RAmax = 0 and RBmax = 0. The degree of disturbance input from the input unit to the calculation unit is
R1 = RAmax = RBmax, R2 = RXmax = RYmax
R1 and R2 are
6. The design method according to claim 2, wherein R1 / 2 + R2 / 4> 0.075 and R1 <0.9. A program for designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device,
Taking numerical values a and b, and disturbance degrees RXmax, RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0) and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0);
creating virtual coordinates comprising an x-coordinate axis and a y-coordinate axis;
Creating, on the virtual coordinates, a group of virtual rectangles formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis, each of which has a length of a and b.
Introducing two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates, and are parallel to and orthogonal to the x coordinate direction and the y coordinate direction, respectively. The center position of the virtual rectangle (m, n) is defined as (X ₀ (m, n), Y ₀ (m, n) with the intersection of the virtual center lines of the virtual rectangle (1, 1) in one row and one column as the origin. ), The center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
The position of each virtual rectangle in n rows is a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns is the degree of disturbance RXmax. In contrast, the random number RX (m) satisfying RXmax ≧ | RX (m) | is translated in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is relative to the degree of disturbance RYmax. Random numbers RY (m) satisfying RYmax ≧ | RY (m) |, or random numbers RY (n) satisfying RYmax ≧ | RY (n) | ) To obtain the center position (X ₀ ′ (m, n)), (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n),
The coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2
_{YE = Y 0 '(m,} n) -b / 2
_{XF = X 0 '(m,} n) + a / 2
_{YF = Y 0 '(m,} n) + b / 2
Steps to find in
n _i1 = n ₀ + 2i + 1, n _i2 = n ₀ + 2i + 2 (where n ₀ is 0 or any positive integer, i = 0, 1, 2, 3,...), m _j1 = m ₀ + 2j + 1, m _j2 = M ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...) (N indicates n _i1 or n _i2 , and m is m _j1 Or m _j2 ), n = n _i1 rows of odd-numbered (when m ₀ is even) (or even-numbered (when m ₀ is odd)) m = m _j1 columns of virtual rectangles (m _j1 , n _i1 ) is set to a random number RA (m, n) satisfying RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) | with respect to the degree of disturbance RAmax, RBmax. ), RB (m, n), and changing to (1 + RA (m _j1 , n _i1 )) × a, (1 + RB (m _j1 , n _i1 )) × b ,
Change the coordinates of the vertices E and F of the rectangle
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Steps to find in
Using the rectangle defined by the coordinates of the vertices E and F after the change as a reference, n = n _i1 rows, even-numbered columns (when m ₀ is even) (or odd-numbered columns (when m ₀ is odd)) In an m = m _j2 column of virtual rectangles (m _j2 , n _i1 ), only the y-coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
A step of seeking
The x coordinate on the left side of the virtual rectangle (m _j2 , n _i1 ) is the same as the XF of the rectangle on the left (m _j1 , n _i1 ), and the x coordinate on the right side is the rectangle on the right (m _{(j + 1) 1} , N _i1 ) as XE,
In a virtual rectangle (m, n _i2 ) of m = m _j1 or m = m _j2 column that is an even-numbered column or an odd-numbered column of n = n _i2 rows, only the x coordinates of the left and right sides of the virtual rectangle are random numbers RA. Vary with (m, n)
XE = X ₀ ′ (m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
A step of seeking
A step of creating a substantially rectangular shape by extending the left and right sides of the virtual rectangle (m, n _i2 ) up and down and setting the intersections of the horizontal sides of the rectangles in the upper and lower rows as YE and YF as the respective y coordinates. When,
creating a substantially rectangular shape for all integers of i and j and creating a substantially rectangular group;
A program that executes. A program for designing a mesh structure pattern of an electromagnetic shielding film used as a front plate of a display device,
Taking numerical values a and b, and disturbance degrees RXmax, RYmax (1 ≧ RXmax ≧ 0, 1 ≧ RYmax ≧ 0) and RAmax, RBmax (1 ≧ RAmax ≧ 0, 1 ≧ RBmax ≧ 0);
creating virtual coordinates comprising an x-coordinate axis and a y-coordinate axis;
Creating, on the virtual coordinates, a group of virtual rectangles formed by a straight line parallel to the x-coordinate axis and a straight line parallel to the y-coordinate axis, each of which has a length of a and b.
Introducing two virtual center lines that pass through the center position of the virtual rectangle (m, n) existing in the n rows and m columns of the virtual coordinates, and are parallel to and orthogonal to the x coordinate direction and the y coordinate direction, respectively. The center position of the virtual rectangle (m, n) is defined as (X ₀ (m, n), Y ₀ (m, n) with the intersection of the virtual center lines of the virtual rectangle (1, 1) in one row and one column as the origin. ), The center position of the virtual rectangle (m, n)
X ₀ (m, n) = a × (m−1), Y ₀ (m, n) = b × (n−1)
Steps to find in
The position of each virtual rectangle in n rows is a random number RX (n) that satisfies RXmax ≧ | RX (n) | with respect to the degree of disturbance RXmax, or the position of each virtual rectangle in m columns is the degree of disturbance RXmax. In contrast, the random number RX (m) satisfying RXmax ≧ | RX (m) | is translated in the x-coordinate axis direction, and / or the position of each virtual rectangle in the m columns is relative to the degree of disturbance RYmax. Random numbers RY (m) satisfying RYmax ≧ | RY (m) |, or random numbers RY (n) satisfying RYmax ≧ | RY (n) | ) To obtain the center position (X ₀ ′ (m, n)), (Y ₀ ′ (m, n)) of each moved virtual rectangle (m, n),
The coordinates E (XE, YE), F (XF, YF) of a pair of vertices E, F facing each other of the translated virtual rectangle (m, n) are
_{XE = X 0 '(m,} n) -a / 2
_{YE = Y 0 '(m,} n) -b / 2
_{XF = X 0 '(m,} n) + a / 2
_{YF = Y 0 '(m,} n) + b / 2
Steps to find in
n _i1 = n ₀ + 4i + 1, n _i2 = n ₀ + 4i + 2, n _i3 = n ₀ + 4i + 3, n _i4 = n ₀ + 4i + 4 (where n ₀ is 0 or any positive integer, i = 0, 1, 2, 3,..., _{M j1} = m ₀ + 2j + 1, m _j2 = m ₀ + 2j + 2 (where m ₀ is 0 or any positive integer, j = 0, 1, 2, 3,...) (N _Represents n _i1 , n _i2 , n _i3 or n _i4 , m represents m _j1 or m _j2 ), n = n _i1 row, odd-numbered column (when m ₀ is even) (or even-numbered column) (When m ₀ is an odd number)), the length of each side of the virtual rectangle (m _j1 , n _i1 ) of m = m _j1 column is set to RAmax ≧ | RA (m , n) |, RBmax ≧ | RB (m, n) | random satisfy RA (m, n), RB (m, n) _{with, (1 + RA (m j1} , n i1) × a, and changing such that _{(1 + RB (m j1,} n i1)) × b,
Change the coordinates of the vertices E and F of the rectangle
XE = X ₀ '(m _j1 , n _i1 ) − (1 + RA (m _j1 , n _i1 )) × a / 2
YE = Y ₀ ′ (m _j1 , n _i1 ) − (1 + RB (m _j1 , n _i1 )) × b / 2
_{XF = X 0 '(m j1} , n i1) + (1 + RA (m j1, n i1)) × a / 2
YF = Y ₀ ′ (m _j1 , n _i1 ) + (1 + RB (m _j1 , n _i1 )) × b / 2
Steps to find in
With the rectangle defined by the coordinates of the vertices E and F after the change as a reference, in the n = n _i1 row, the even-numbered column (m ₀ Is an even number) (or an even-numbered column (when m ₀ is an odd number)), and only the y-coordinates of the upper and lower sides of the virtual rectangle are random numbers RB in m = m _j2 column rectangles (m _j2 , n _i1 ). Vary with (m, n)
YE = Y ₀ ′ (m _j2 , n _i1 ) − (1 + RB (m _j2 , n _i1 )) × b / 2
YF = Y ₀ ′ (m _j2 , n _i1 ) + (1 + RB (m _j2 , n _i1 )) × b / 2
A step of seeking
The x coordinate on the left side of the virtual rectangle (m _j2 , n _i1 ) is the same as the XF of the rectangle on the left (m _j1 , n _i1 ), and the x coordinate on the right side is the rectangle on the right (m _{(j + 1) 1} , N _i1 ) as XE,
n = n _i3 rows of even-numbered columns (when m ₀ is an even number) (or odd-numbered columns (when m ₀ is an odd number)) of m = m _j2 columns of virtual rectangles (m _j2 , n _i3 ) The length of each side is set to random numbers RA (m, n), RB () satisfying RAmax ≧ | RA (m, n) |, RBmax ≧ | RB (m, n) | with respect to the degree of disturbance RAmax, RBmax. m, n) and changing to (1 + RA (m _j2 , n _i3 )) × a, (1 + RB (m _j2 , n _i3 )) × b;
Change the coordinates of the vertices E and F of the rectangle
XE = X ₀ ′ (m _j2 , n _i3 ) − (1 + RA (m _j2 , n _i3 )) × a / 2
YE = Y ₀ ′ (m _j2 , n _i3 ) − (1 + RB (m _j2 , n _i3 )) × b / 2
_{XF = X 0 '(m j2} , n i3) + (1 + RA (m j2, n i3)) × a / 2
YF = Y ₀ ′ (m _j2 , n _i3 ) + (1 + RB (m _j2 , n _i3 )) × b / 2
Steps to find in
With reference to the rectangle defined by the coordinates of the vertices E and F after the change, in the odd-numbered column of n = n _i3 rows (when m ₀ is even) (or even-numbered column (when m ₀ is odd)) In a certain m = m _j1 column of virtual rectangles (m _j1 , n _i3 ), only the y-coordinates of the upper and lower sides of the virtual rectangle are changed by a random number RB (m, n),
YE = Y ₀ ′ (m _j1 , n _i3 ) − (1 + RB (m _j1 , n _i3 )) × b / 2
YF = Y ₀ ′ (m _j1 , n _i3 ) + (1 + RB (m _j1 , n _i3 )) × b / 2
A step of seeking
The x coordinate of the left side of the virtual rectangle (m _j1 , n _i3 ) is the same as the XF of the left adjacent rectangle (m _{(j−1) 2} , n _i3 ), and the x coordinate of the right side is the right adjacent rectangle (m _j2 , N _i3 ) as XE,
For the n _i2 row and the n _i4 row, in the virtual rectangles (m, n _i2 ) and (m, n _i4 ) of m = m _j1 column or m = m _j2 column which are even-numbered columns or odd-numbered columns of each row, Only the x coordinate of the left and right sides of the virtual rectangle is changed with a random number RA (m, n),
For the rectangle (m, n _i2 ), XE = X ₀ ′ (m, n _i2 ) − (1 + RA (m, n _i2 )) × a / 2
XF = X ₀ '(m, n _i2 ) + (1 + RA (m, n _i2 )) × a / 2
For the rectangle (m, n _i4 ), XE = X ₀ ′ (m, n _i4 ) − (1 + RA (m, n _i4 )) × a / 2
XF = X ₀ '(m, n _i4 ) + (1 + RA (m, n _i4 )) × a / 2
A step of seeking
The left and right sides of the virtual rectangles (m _j2 , n _i2 ) and (m _j2 , n _i4 ) are extended up and down, and the intersections of the horizontal sides of the rectangles in the upper and lower rows are the Y coordinates YE and YF, respectively. Creating a generally rectangular shape by:
creating a substantially rectangular shape for all integers of i and j and creating a substantially rectangular group;
A program that executes.   The program according to claim 9 or 10, wherein RXmax = 0 and RYmax = 0.   The program according to claim 9 or 10, wherein RAmax = 0 and RBmax = 0. R1 = RAmax = RBmax, R2 = RXmax = RYmax
R1 and R2 are
11. The program according to claim 9, wherein R1 / 2 + R2 / 4> 0.075 and R1 <0.9. In electromagnetic shielding film with mesh structure,
The mesh structure has a pattern composed of a substantially rectangular group in which a substantially rectangular group is arranged in the direction of two straight lines orthogonal to each other, and each side of each substantially rectangular shape is not aligned in a straight line with each other in the direction of the two straight lines. An electromagnetic shielding film characterized by that.   15. The electromagnetic shielding film according to claim 14, wherein the mesh structure is formed of an electromagnetic shielding conductor made of one kind selected from aluminum, copper, silver, gold, and nickel, or an alloy thereof. 16. The electromagnetic shielding film according to claim 14, wherein the electromagnetic shielding film is used for a display device that emits electromagnetic waves.   The electromagnetic shielding film according to claim 16, wherein the indicator is FED, PDP, CRT.

Images