Low-emissivity film with frequency-selective transmission or shielding patterns for electromagnetic waves

Abstract

Various embodiments disclosed herein relate to a low-E film using patterns for selectively transmitting or blocking electromagnetic waves according to frequency, the low-E film comprising: an insulating layer made of an insulating material; and a metal coating layer obtained by coating one surface of the insulating layer with a metal or metal oxide. The metal coating layer includes a plurality of unit cells having a polygonal shape and repeatedly arranged in rows and columns, and each of the plurality of unit cells includes patterns formed by partially removing the metal coating layer. The patterns include: a shielding pattern that forms a shielding region including the center of the unit cell in order to block electromagnetic waves in a specific frequency band; and a transmission pattern that is formed in a transmission region, which is a region of the unit cell other than the shielding region, in order to transmit electromagnetic waves in frequency bands other than the specific frequency band.

Description

Low-E film with transmission or blocking patterns based on electromagnetic wave frequency

[0001] Various embodiments of this post relate to Low-E films with patterns applied to selectively pass or block electromagnetic waves.

[0002]

[0003] Low-Emissivity Film is a special coating film applied to architectural glass or automobiles, and can improve heating and cooling efficiency in buildings and automobiles through the thermal insulation effect between the inside and outside caused by the blocking of infrared rays by silver (Ag) or metal oxides thinly coated on the film.

[0004] However, when a low-E film is coated over the entire glass, an incident electromagnetic wave induces a current in the silver or metal oxide layer of the low-E film, causing the incident electromagnetic wave to be reflected. As a result, when a low-E film is coated over the entire glass of a building, car, etc., electromagnetic waves cannot enter the interior, which can cause communication interference.

[0005] Currently, companies and research facilities use 5G specialized networks built with 5G for internal configurations that are accessible only to specific members. In this case, there is a need for technology that allows commercial frequency electromagnetic waves to pass through building glass to enable general communication, while blocking the external leakage of electromagnetic waves from the 5G specialized network to maintain security.

[0006] To solve these problems, a portion of the Low-E film can be removed to create a gap area in the shape of a square loop, and a repeating pattern of unit cells separated by the gap area can be formed. In this case, while the transmission of electromagnetic waves in a specific frequency band is possible, the proportion of the gap area within the Low-E film increases, leading to a problem where the heat blocking performance, which is the film's original function, deteriorates. Additionally, as many straight-line patterns are formed, there is a problem of light scattering / blurring that reduces user visibility.

[0007] Accordingly, a structure was proposed to prevent light spreading / blurring effects by applying a sine wave pattern to the low-E film to allow specific frequencies to pass through, but in this case, there was a problem in that the transmission performance varied depending on the direction of the incident electromagnetic waves due to the asymmetry of the pattern in the vertical / horizontal direction.

[0008] In addition, a pattern structure was used in which resonators with a size of half the wavelength of the electromagnetic waves to be blocked were repeatedly arranged to block specific frequencies, but this cannot be used in low-E films intended for thermal insulation because the pattern creates a lot of empty space.

[0009]

[0010] Accordingly, the various embodiments of this publication aim to provide a low-E film with a pattern applied that selectively transmits and blocks electromagnetic waves while reducing the gap area in the low-E film by applying a specific electromagnetic wave transmission pattern structure to the low-E film.

[0011] The technical tasks intended to be accomplished in this document are not limited to those mentioned above, and other technical tasks not mentioned will be clearly understood by those skilled in the art to which this post belongs from the description below.

[0012]

[0013] According to one embodiment of the present invention, a low-E film comprises an insulating layer composed of an insulating material and a metal coating layer having a metal or a metal oxide coated on one surface of the insulating layer, wherein the metal coating layer comprises a plurality of unit cells that are polygonal in shape and are repeatedly arranged in rows and columns, and each of the plurality of unit cells comprises patterns formed by removing a portion of the metal coating layer, and the patterns may include a blocking pattern that forms a blocking region including the center of the unit cell to block electromagnetic waves of a specific frequency band, and a transmission pattern formed in a transmission region which is a region excluding the blocking region of the unit cell to pass electromagnetic waves of a band other than the specific frequency band.

[0014] According to one embodiment of the present invention, the metal coating layer may include a plurality of unit cells that are square or rectangular in shape and are repeatedly arranged in rows and columns.

[0015] According to one embodiment of the present invention, the length of one side of the unit cell may be 1 / 4 of the wavelength of the center frequency of the specific frequency band.

[0016] According to one embodiment of the present invention, the blocking area comprises a first area having a square shape formed at the center of the unit cell and a second, third, fourth, and fifth area having the same shape formed by extending from each side of the first area to each side of the unit cell, wherein each of the second to fifth areas may be characterized in that the width of the portion in contact with the first area is the largest, the width becomes equal or smaller as it extends to the side of the unit cell, and the width of the portion in contact with the side of the unit cell is the smallest.

[0017] According to one embodiment of the present invention, each of the second to fifth regions has an equilateral trapezoidal shape, and the width may decrease uniformly from the part in contact with the first region to the part in contact with the side of the unit cell.

[0018] According to an exemplary embodiment of the present invention, the blocking pattern forming each of the second to fifth regions may be in the form of a curve in which the width decreases exponentially from the part in contact with the first region to the part in contact with the side of the unit cell.

[0019] According to one embodiment of the present invention, the transmission pattern may be formed to separate the transmission area into a plurality of transmission area pieces separated from each other.

[0020] According to one embodiment of the present invention, the transmission pattern may include a boundary line pattern formed along a straight line or curve connecting the meeting points of two adjacent sides of the unit cell among the parts where the blocking area and the side of the unit cell meet.

[0021] According to one embodiment of the present invention, the transmission pattern may further include a straight line pattern formed between a first point dividing the boundary line pattern in half and a second vanishing point set at the vertex of the unit cell, a straight line pattern formed between a second point dividing the boundary line pattern in a 1:3 ratio and the second vanishing point, a straight line pattern formed between a third point dividing the boundary line pattern in a 3:1 ratio and the second vanishing point, a straight line pattern formed between the first point and a first vanishing point set at the point where two of the second to fifth regions meet, a straight line pattern formed between the second point and the first vanishing point, and a straight line pattern formed between the third point and the first vanishing point.

[0022] According to one embodiment of the present invention, the transmission pattern includes two curve patterns formed between a first vanishing point set at the point where two of the second to fifth regions meet and a second vanishing point set at the vertex of the unit cell, and each of the two curve patterns may pass through a point that divides the boundary line pattern in a 1:2 ratio and a point that divides it in a 2:1 ratio.

[0023] According to one embodiment of the present invention, the transmission pattern may further include a straight line pattern connecting the first vanishing point and the second vanishing point in a straight line.

[0024] According to one embodiment of the present invention, the transmission pattern may include two curved patterns and one straight line pattern formed between a first vanishing point set at the point where two of the second to fifth regions meet and a second vanishing point set at the vertex of the unit cell, a first boundary line pattern provided in the transmission region in the shape of a partial arc of a circle centered at the center of the unit cell and having a diameter longer than the length of one side of the unit cell, and a second boundary line pattern provided in the transmission region in the shape of a partial arc of a circle centered at the second vanishing point and having a radius smaller than the straight distance to the first vanishing point.

[0025] According to one embodiment of the present invention, the patterns can be formed after the first vanishing point is moved from the vertex of the unit cell in the direction of the blocking area by a preset length, or after the first vanishing point is moved from the vertex of the unit cell in the opposite direction of the blocking area by a preset length.

[0026] According to one embodiment of the present invention, the patterns can be formed after the second vanishing point is moved by a preset length in the direction of the center of the unit cell or after the second vanishing point is moved by a preset length in the direction opposite to the center of the unit cell.

[0027] According to one embodiment of the present invention, the transmission pattern may include a grid pattern that divides the investment area into a grid shape.

[0028] According to one embodiment of the present invention, the low-e glass may include glass and a low-e film according to any one of the embodiments formed on the glass.

[0029] According to one embodiment of the present invention, a PET layer provided between the low-E film and the glass may be further included.

[0030] According to one embodiment of the present invention, the low-E film may be formed on both sides of the glass.

[0031] According to one embodiment of the present invention, a low-E film is formed on one side of the glass, and a conductor region of the same shape is formed on the other side of the glass at a position corresponding to a blocking region formed in the low-E film.

[0032]

[0033] According to one embodiment of the present invention, by removing less of the low-E film to maintain the thermal insulation effect, which is the original role of the low-E film, it is possible to enable frequency-selective blocking and transmission of electromagnetic waves in a specific frequency range, which was impossible with the entire low-E film structure, thereby preventing communication interference in buildings or automobiles and preventing the leakage of the specialized network to the outside.

[0034] The effects obtainable from this post are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person with ordinary knowledge in the technical field to which this post belongs from the description below.

[0035]

[0036] Figure 1 is a drawing illustrating a low-E film in which unit cells containing specific frequency electromagnetic wave blocking regions are repeatedly arranged.

[0037] FIGS. 2a and 2b are drawings illustrating the structure of a unit cell including a specific frequency electromagnetic wave blocking region and a grid transmission pattern according to each other embodiment of the present invention.

[0038] FIGS. 3a to 3c are three-dimensional views illustrating glass coated with a low-E film of various embodiments for comparison.

[0039] FIGS. 4a and FIGS. 4b are drawings showing parts of a transmission area according to different embodiments of the present invention.

[0040] FIGS. 5a to 5c illustrate the structure of a unit cell that further includes a transmission pattern converging to a vanishing point in a star-shaped pattern according to each different embodiment of the present invention.

[0041] FIGS. 6a to 6d are drawings illustrating the structure of a transmission area including a transmission pattern converging to a vanishing point according to each different embodiment of the present invention.

[0042] Figures 7a and 7b are a description of the TE mode and TM mode of electromagnetic waves and a graph showing the degree of loss of the TE mode component of electromagnetic waves incident on a low-E film according to the angle of incidence and the shape of the blocking pattern.

[0043] FIG. 8 is a graph showing the TE mode loss of electromagnetic waves according to the angle of incidence when electromagnetic waves are incident on a low-E film to which a specific electromagnetic wave blocking pattern and a transmission pattern according to one embodiment of the present invention are applied.

[0044] FIG. 9 is a graph showing the TE mode loss of electromagnetic waves according to the direction of incidence when electromagnetic waves are incident on a low-E film to which a specific electromagnetic wave blocking pattern and a transmission pattern according to one embodiment of the present invention are applied.

[0045] FIGS. 10a and 10b are three-dimensional views illustrating a structure forming a low-E film and a pattern or conductive region on both sides of a glass according to different embodiments of the present invention.

[0046] FIGS. 11a and 11b are graphs showing the degree of electromagnetic wave loss according to the angle of incidence of the TE mode component of an electromagnetic wave incident on a structure forming a low-E film and a pattern or conductor region on both sides of a glass according to different embodiments of the present invention.

[0047] Figure 12 is an experimental result comparing the difference in user visibility of glass coated with a low-E film including a straight or curved pattern according to each embodiment.

[0048]

[0049] The advantages and features of this post, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, this post is not limited to the embodiments described below but may be implemented in various different forms; these embodiments are provided merely to ensure that the posting of this post is complete and to fully inform those skilled in the art of the scope of this post, and this post is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0050] When one component is referred to as being "connected to" or "coupled to" another component, it includes cases where it is directly connected or coupled to the other component, or cases where another component is interposed. Conversely, when one component is referred to as being "directly connected to" or "directly coupled to" another component, it indicates that no other component is interposed. "And / or" includes each of the mentioned items and all combinations of one or more of them.

[0051] The terms used herein are for describing embodiments and are not intended to limit this post. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, actions, and / or elements to the mentioned components, steps, actions, and / or elements.

[0052] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another.

[0053] Therefore, it is obvious that the first component mentioned below may be the second component within the technical scope of this post. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning that is commonly understood by those skilled in the art to which this post belongs. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0054] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0055]

[0056] Figure 1 is a drawing illustrating a low-E film in which unit cells containing specific frequency electromagnetic wave blocking regions are repeatedly arranged.

[0057] Low-E film (10) can be applied to glass of buildings or windows of automobiles for thermal insulation purposes and may include a metal coating layer in which silver (Ag) or a metal oxide is thinly coated on the insulating layer. When the Low-E film (10) is coated over the entire glass of a building, it may interfere with the transmission of electromagnetic waves and cause communication interference indoors. To solve this problem, the metal coating layer of the Low-E film (10) is removed according to a certain pattern so that the region corresponding to the commercial network frequency band among electromagnetic waves can pass through the Low-E film (10). In addition, in the case of specialized networks used internally in companies, research facilities, etc., there is a need to prevent signal leakage to the outside for security purposes, so the metal coating layer of the Low-E film (10) is further removed according to a certain pattern to block the specialized network frequency, thereby blocking the electromagnetic wave region corresponding to the specialized network frequency band. This document proposes a shard-shaped pattern added to a low-E film (10) so that it can selectively transmit or block electric waves at a frequency while reducing the deterioration of the thermal insulation effect, which is the original function of the low-E film.

[0058] Referring to FIG. 1, a specific frequency electromagnetic wave blocking area (30) can be formed by removing the low-E film (10) in a specific pattern on the low-E film (10). The low-E film (10) can be applied to architectural glass or automobiles, and can be composed of thinly surface-treated silver (Ag) or metal oxide. The low-E film (10) generally has a high sheet resistance of about 5 ohm / sq. The entire pattern of the low-E film (10) can be formed by repeatedly arranging unit cells (20), which are a single constituent unit. The unit cells (20) can be polygonal in shape, and among them, can be rectangular or square in shape. The specific frequency electromagnetic wave blocking area (30) can be located at the center of the unit cells (20), and the square area at the center can be referred to as the first area. Accordingly, the unit cells (20) and the first area can share a center point (40). Additionally, the specific frequency electromagnetic wave blocking area (30) may include four areas of the same shape formed by extending from each side of the first area to each side of the unit cell (20), and each area may be referred to as the second to fifth areas. Accordingly, the length of one side of the unit cell (20) may be equal to twice the distance from the outer end of the unit cell (20) of the second to fifth areas to the center point (40), and this length may be 1 / 4 of the wavelength of the center frequency electromagnetic wave of the specific frequency band to be blocked. This may result in a higher effect of maintaining blocking performance with increasing angle of incidence of the electromagnetic wave compared to when the length is set to 1 / 2 of the wavelength of the center frequency electromagnetic wave of the specific frequency band to be blocked.This is because when an electromagnetic wave with a large angle of incidence is incident, a phase deviation may occur between adjacent unit cells (20), which may result in a decrease in blocking performance. However, the decrease in blocking performance caused by the phase deviation can be effectively improved by forming the length of one side of the unit cell (20) to be 1 / 4 of the wavelength of the electromagnetic wave to be blocked, thereby causing the direction of the induced current in each unit cell (20) to be reversed. The specific frequency electromagnetic wave blocking area (30) can be formed by a straight line, a curve, or a pattern structure in which straight lines and curves are mixed.

[0059] Referring to FIG. 1, the width of the part closest to the center point (40) in the second to fifth regions may be referred to as the first width (50), the width of the part where one side of the second to fifth regions and the unit cell (20) meet may be referred to as the third width (70), and the width of the part between the first width (50) and the third width (70) may be referred to as the second width (60). At this time, if the first width (50) is larger than the third width (70), the second width (60) is larger than the third width (70), and the first width (50) is larger than or equal to the second width (60), then the electromagnetic waves of the target frequency can be effectively blocked. In FIG. 1, a specific frequency electromagnetic wave blocking area (30) in the shape of a straight line is formed to decrease in the order of a first width (50), a second width (60), and a third width (70), but this is merely an example and the shape of the specific frequency electromagnetic wave blocking area (30) is not limited thereto.

[0060] Referring to FIG. 1, the area excluding the specific frequency electromagnetic wave blocking area (30) composed of the first to fifth areas in the unit cell (20) can be separated from each other and divided into four areas of the same shape, each of which can be referred to as a four-part transmission area (80). When four unit cells (20) are arranged in a grid shape as shown in FIG. 1, four four-part transmission areas (80) can be combined to form a transmission area (90). As will be described later, security can be maintained by blocking electromagnetic waves of the specialized network frequency through the specific frequency electromagnetic wave blocking area (30), and general communication can be enabled by utilizing a certain pattern of the transmission area (90) to transmit electromagnetic waves of the commercial network frequency.

[0061] FIGS. 2a and 2b are drawings illustrating the structure of a unit cell including a specific frequency electromagnetic wave blocking region and a grid transmission pattern according to each other embodiment of the present invention.

[0062] Referring to FIG. 2a, the specific frequency electromagnetic wave blocking area (30) has a width that decreases in the order of the first width (50), the second width (60), and the third width (70) as illustrated, and the pattern may have a shape in which the width narrows in a straight line at a constant rate. In conclusion, each of the second to fifth areas has an isosceles trapezoidal shape, and the structure may have a structure in which the width decreases in the order of the first to third widths (50, 60, 70) as it goes from the part where each of the second to fifth areas contacts the first area to the part where each of the second to fifth areas contacts the unit cell (20). The pattern structure may be referred to as the first throwing star shape pattern.

[0063] The area within the unit cell (20) of the first shard-shaped pattern, excluding the specific frequency electromagnetic wave blocking area (30), can be formed as a grid transmission pattern (1100) that divides the Low-E film (10) into squares by straight-line patterns parallel to the sides of the unit cell (20). When the Low-E film (10) is coated on the entire surface of the glass without a pattern, if electromagnetic waves are incident on the metal components of the Low-E film (10), an induced current is generated, which can reflect the electromagnetic waves and cause communication interference. Accordingly, a grid transmission pattern can be formed within the transmission area (90) to transmit electromagnetic waves of a specific frequency. At this time, the length of the side of the smallest square constituent unit of the grid pattern can be formed to be 1 / 20 to 1 / 40 of the center frequency wavelength of the frequency band of the electromagnetic waves to be transmitted.

[0064] Referring to FIG. 2b, the specific frequency electromagnetic wave blocking area (30) has a width that decreases in the order of the first width (50), the second width (60), and the third width (70) as illustrated, and the pattern may have a shape in which the width narrows in a curved form. Consequently, each of the second to fifth areas may have a structure surrounded by one side of the first area and curves that decrease in width exponentially. Accordingly, in the case of the structure, the width may decrease exponentially in the order of the first to third widths (50, 60, 70). The pattern structure may be referred to as the second throwing star shape pattern.

[0065] As illustrated in FIG. 2b, a grid transmission pattern may be included to transmit electromagnetic waves of a specific frequency in a portion excluding the specific frequency electromagnetic wave blocking area (30) within the unit cell (20). The first and second dagger-shaped patterns and the dagger-shaped pattern embodiments described below are merely embodiments of the present invention, and the shape of the specific frequency electromagnetic wave blocking area (30) and the internal structure of the unit cell (20) are not limited thereto and may include first to fifth regions and have various shapes and structures satisfying width conditions of first to third widths (50, 60, 70).

[0066] FIGS. 3a to 3c are three-dimensional views illustrating glass coated with a low-E film of various embodiments for comparison.

[0067] FIG. 3a is a three-dimensional view showing glass coated with a low-E film including the second dagger-shaped pattern structure shown in FIG. 2b.

[0068] Referring to FIG. 3a, a Low-E film (10) having a second shuriken-shaped pattern formed thereon can be coated on glass (110). The second shuriken-shaped pattern may be a portion that appears after the Low-E film (10) is removed. That is, a plurality of Low-E film pieces separated from each other may be coated on the glass (110) by cutting a square Low-E film (10) along the second shuriken-shaped pattern. Thus, there may be a gap (100) separating the Low-E film pieces from each other. And a part of the gap (100) may have the same shape as the second shuriken-shaped pattern so as to form the second shuriken shape. According to one embodiment, if a gap (100) of a second shuriken-shaped pattern is formed within a square unit cell (20) with a side length of 16.5 mm as in FIG. 2b or FIG. 3a, 16.5 mm x 16.5 mm = 272.25 mm 2 The area of ​​the area coated with the Low-E film (10), excluding the gap (100) area among the unit cell areas, is 246 mm 2It may be. Here, the width of the gap (100) may be 0.1 mm. At this time, the length of one side of the unit cell (20), 16.5 mm, may be similar to 1 / 4 of the wavelength of the electromagnetic wave of the corresponding frequency, assuming that the center frequency of the specialized network band to be blocked is 4.7 GHz according to one embodiment.

[0069] Referring to FIG. 3a, a PET layer (polyethylene terephthalate layer) (120) is provided between the glass (110) and the low-E film (10), so that the low-E film (10) can be deposited on the PET layer (120). According to one embodiment, in this case, the low-E film (10) may form a metal coating layer by coating silver or a metal oxide on the PET layer (120) without an insulating layer.

[0070] FIG. 3b is a three-dimensional view illustrating an example in which a low-e film is coated on the front surface of a glass according to one embodiment.

[0071] Referring to FIG. 3b, a patternless low-E film (10) capable of transmitting electromagnetic waves may be coated or bonded to glass (110). As the low-E film (10) is attached to the front surface of the glass, it may be referred to as a front low-E film structure (1000). In the case of the front low-E film structure (1000), the unit cell area (272.25 mm²) 2 The entire thing can be seen as being coated with a low-E film (10). While this provides excellent thermal insulation, there may be problems with communication blockage due to electromagnetic wave reflection caused by induced current and shielding effects.

[0072] FIG. 3c is a three-dimensional view illustrating an example in which a low-E film having a grid pattern is coated on glass according to one embodiment.

[0073] Referring to FIG. 3c, a grid pattern can be formed on the Low-E film (10) to solve the problem of electromagnetic wave reflection and shielding of the front Low-E film structure (1000). The portion of the Low-E film (10) removed to form the grid pattern can be referred to as a gap (100). According to one embodiment, the unit cell (20) can be set as a square structure with a side length of 16.5 mm. The separated square pieces of Low-E film formed by the grid pattern can be 1.4 mm x 1.4 mm in size. The width of the gap can be 0.1 mm. Therefore, the arrangement spacing between the grid patterns is 1.5 mm, which is equal to 1.5 mm, which is 1 / 40 of the wavelength (λ0) corresponding to the 5 GHz electromagnetic wave. Accordingly, 272.25 mm 2 The area of ​​the region coated with the Low-E film (10) in the unit cell glass of size is 240.25 mm 2 It could be.

[0074] Although not shown in FIG. 3b and FIG. 3c, similar to FIG. 3a, a PET layer (polyethylene terephthalate layer) (120) is provided between the glass (110) and the low-E film (10) so that the low-E film (10) can be deposited on the PET layer (120). According to one embodiment, in this case, the low-E film (10) may form a metal coating layer by coating silver or a metal oxide directly onto the PET layer (120) without an insulating layer.

[0075] FIGS. 4a and FIGS. 4b are drawings showing parts of a transmission area according to different embodiments of the present invention.

[0076] FIG. 4a is a drawing illustrating a four-divided transparent area within a unit cell according to one embodiment.

[0077] Referring to FIG. 4a, the four-part transmission area (80) may include a boundary line (81) that is a line connecting the parts where the second to fifth regions of the specific frequency electromagnetic wave blocking area (30) meet the side of the unit cell (20). At this time, the area within the unit cell (20) that is close to the specific frequency electromagnetic wave blocking area (30) and does not include the specific frequency electromagnetic wave blocking area (30) with respect to the boundary line (81) may be referred to as an adjacent area (82), and the part within the unit cell (20) that does not include the specific frequency electromagnetic wave blocking area (30) and the adjacent area (82) may be referred to as an outer area (83). The boundary line (81) may be composed of a straight line, a curve, or a line that is a mixture of straight lines and curves. A vanishing point (130, 131) may exist within the unit cell (20), and the adjacent area (82) and the outer area (83) may be divided into several zones or pieces with a certain rule by a line connecting the vanishing point (130, 131) at the boundary line (81). There may be one or two vanishing points per unit cell (20), and according to one embodiment, different unit cells (20) may share a vanishing point (131). The adjacent area (82) is located close to the specific frequency electromagnetic wave blocking area (30), so that the current coupling phenomenon caused by the specific frequency electromagnetic wave blocking area (30) is dominant, and the outer area (83) may have an induced current formed predominantly by an external incident electromagnetic wave.

[0078] FIG. 4b is a drawing illustrating a four-divided transparent area within a unit cell according to another embodiment.

[0079] Referring to FIG. 4b, the adjacent area (82) and the outer area (83), separated by a boundary line (81) formed by a curve, can be divided into multiple surfaces or segments by a pattern extending from the boundary line (81) to the vanishing point (130). When electromagnetic waves are incident from the outside, induced currents are formed in a certain direction in the divided surfaces of the adjacent area (82) and the outer area (83). In this case, the currents between the adjacent surfaces cancel each other out, so that the blocking and reflection of electromagnetic waves are prevented and the electromagnetic wave transmission effect can be increased. Since both the current coupling phenomenon caused by the specific frequency electromagnetic wave blocking area (30) of the adjacent area (82) and the induced current caused by the externally incident electromagnetic waves in the outer area (83) are factors that reflect electromagnetic waves, it may be necessary to divide the adjacent area (82) and the outer area (83) into a pattern to cancel out the induced currents, as in this embodiment.

[0080] FIGS. 5a to 5c illustrate the structure of a unit cell that further includes a transmission pattern converging to a vanishing point in a star-shaped pattern according to each different embodiment of the present invention.

[0081] FIG. 5a is a drawing illustrating the third dagger shape pattern and the location of the vanishing point accordingly.

[0082] Referring to FIG. 5a, a curved boundary line (81) is applied to a specific frequency electromagnetic wave blocking area (30) identical to the second dagger-shaped pattern within the unit cell (20), one vanishing point (130) is located inside the specific frequency electromagnetic wave blocking area (30), and another vanishing point (131) is located in the outer area (83), and the pattern extending from the boundary line (81) to the vanishing points (130, 131) may be curved. The structure may be referred to as the third dagger-shaped pattern.

[0083] FIG. 5b is a drawing illustrating the fourth dagger shape pattern and the location of the vanishing point accordingly.

[0084] Referring to FIG. 5b, a curved boundary line (81) is applied to a specific frequency electromagnetic wave blocking area (30) identical to the second dagger-shaped pattern within the unit cell (20), one vanishing point (130) is located in an adjacent area (82), and another vanishing point (131) is located in an outer area (83), and the pattern extending from the boundary line (81) to the vanishing points (130, 131) may be curved. The structure may be referred to as the fourth dagger-shaped pattern.

[0085] Referring to FIG. 5c, a curved boundary line (81) is applied to a specific frequency electromagnetic wave blocking area (30) identical to the first dagger-shaped pattern within the unit cell (20), and only one vanishing point (130) is located on the pattern of the specific frequency electromagnetic wave blocking area (30), and the pattern of the outer area (83) may have a diverging shape without a vanishing point (130). The pattern extending from the boundary line (81) to the vanishing point (130) and the diverging pattern may be curved. The structure may be referred to as the fifth dagger-shaped pattern.

[0086] The embodiments illustrated in FIGS. 5a to 5c are exemplary, and the pattern structure of the specific frequency blocking area (30) and the four-part transmission area (80) may be divided into pieces of the Roy film by various patterns including straight lines, curves, or a mixture of straight lines and curves, and the embodiments of the present invention are not limited to those illustrated.

[0087] FIGS. 6a to 6d illustrate the structure of a transmission area formed by the meeting of four divided transmission areas of four unit cells according to different embodiments of the present invention.

[0088] Referring to FIG. 6a, one vanishing point (131) in the transmission area (90) can be shared by four unit cells (20). Additionally, another vanishing point (130) may exist on the pattern of the specific frequency electromagnetic wave blocking area (30) of the first dagger-shaped pattern, so that a pattern can be formed in which the vanishing points (130, 131) are connected in a straight line from the curved boundary line (81). This shape may be referred to as the first transmission area. Specifically, the first transmission area comprises: a linear pattern formed between a first boundary point dividing the boundary line (81) of the 4-divided transmission area (80) in half and a vanishing point (131) set at the vertex of the unit cell (20); a linear pattern formed between a second boundary point dividing the boundary line (81) of the 4-divided transmission area (80) in a 1:3 ratio and a vanishing point (131) set at the vertex of the unit cell (20); a linear pattern formed between a third boundary point dividing the boundary line (81) of the 4-divided transmission area (80) in a 3:1 ratio and a vanishing point (131) set at the vertex of the unit cell (20); a linear pattern formed between the first boundary point and a vanishing point (130) set at the point where two of the second to fifth areas meet; and a straight line formed between the second boundary point and a vanishing point (130) set at the point where two of the second to fifth areas meet. It may include a straight line pattern formed between a pattern, a third boundary point, and a vanishing point (130) set at the point where two of the second to fifth regions meet.

[0089] Referring to FIG. 6b, one vanishing point (131) in the transmission area (90) can be shared by four unit cells (20). Additionally, another vanishing point (130) may exist on the pattern of the specific frequency electromagnetic wave blocking area (30) of the first dagger-shaped pattern, so that a pattern can be formed in which the vanishing points (130, 131) are connected in a curved line (81). This form may be referred to as the second transmission area. Specifically, the second transmission area may include two curved patterns that divide the line in a 1:2 and 2:1 ratio, respectively, formed between the vanishing point (130) set at the point where two of the second to fifth areas meet and the vanishing point (131) set at the vertex of the unit cell (20).

[0090] Additionally, although not shown in the drawing, the second transmission area may further include a straight line pattern connecting a vanishing point (130) set at the point where two of the second to fifth areas meet and a vanishing point (131) set at the vertex of the unit cell (20) in a straight line.

[0091] Referring to FIG. 6c, four unit cells (20) may share a single vanishing point (130) in the transmission area (90). Additionally, another vanishing point (130) may exist on the pattern of the specific frequency electromagnetic wave blocking area (30) of the first dagger-shaped pattern, so that a pattern may be formed in which the vanishing points (130, 131) are connected in a curved line (81). Furthermore, as illustrated, an additional pattern may be formed in the outer area (83) between the unit cells (20). This form may be referred to as the third transmission area. Specifically, the third transmission area may include two curved patterns and one straight line pattern formed between a vanishing point (130) set at the point where two of the second to fifth areas meet and a vanishing point (131) set at the vertex of the unit cell (20), a first boundary line pattern centered at the center of the unit cell (20) and having a partial arc shape of a circle with a diameter longer than the length of one side of the unit cell (20), and a second boundary line pattern centered at a vanishing point (131) set at the vertex of the unit cell (20) and having a partial arc shape of a circle with a radius smaller than the straight distance to the vanishing point (130) set at the point where two of the second to fifth areas meet.

[0092] Referring to FIG. 6d, a vanishing point (131) may be placed in the outer region (83) of each unit cell (20) in the transmission area (90). Additionally, another vanishing point (130) may exist on the pattern of the specific frequency electromagnetic wave blocking area (30) of the first dagger-shaped pattern, so that a pattern may be formed in which the vanishing points (130, 131) are connected in a curve from the curved boundary line (81). Additionally, as illustrated, an additional pattern may be formed in the outer region (83) between the unit cells (20). This form may be referred to as the fourth transmission area. Specifically, in the fourth transmission area, a vanishing point (130) is set at the point where two of the second to fifth areas meet, and a vanishing point (131) located at the vertex of the unit cell (20) may be moved a certain length in the direction of the specific frequency blocking area (30) inside the unit cell or in the opposite direction, after which a transmission pattern of the first to third transmission areas may be formed.

[0093] The embodiments illustrated in FIGS. 6a to 6d are exemplary, and the transmission area (90) may be divided into several pieces of Roy film in various forms such as straight lines, curves, or a mixture of straight lines and curves, and the embodiments of the present invention are not limited to those illustrated in the drawings.

[0094] Figures 7a and 7b are a description of the TE mode and TM mode of electromagnetic waves and a graph showing the degree of loss of the TE mode component of electromagnetic waves incident on a low-E film according to the angle of incidence and the shape of the blocking pattern.

[0095] Figure 7a is a stereoscopic view showing the TE mode and TM mode of electromagnetic waves.

[0096] Referring to FIG. 7a, when an electromagnetic wave (700) propagates to a medium boundary (720) between two media, an incident plane (710) can be defined that is perpendicular to the medium boundary and contains the electromagnetic wave (700). The electromagnetic wave (700) may have all polarization vibrations of 360 degrees with respect to the direction of propagation. At this time, the vibration component contained in the incident plane (710) and perpendicular to the direction of propagation of the electromagnetic wave (700) can be defined as the TM mode (Transverse Magnetic Mode), and the vibration component perpendicular to both the incident plane (710) and the direction of propagation of the electromagnetic wave (700) can be defined as the TE mode (Transverse Magnetic Mode). When both the TE mode component and the TM mode component of the electromagnetic wave (700) are incident on the Roy film (10), they exhibit similar transmission tendencies; however, since the TE mode component is generally blocked to a greater degree, only the TE mode component is illustrated and analyzed in FIG. 7b.

[0097] FIG. 7b is a graph showing the degree of electromagnetic wave loss according to the angle of incidence of the TE mode component of the electromagnetic wave when an electromagnetic wave is incident on a low-E film to which a specific electromagnetic wave blocking pattern and a transmission pattern according to one embodiment of the present invention are applied, depending on the shape of the blocking pattern.

[0098] Referring to FIG. 7b, a graph (1300) is shown indicating how much the TE mode component of the electromagnetic wave is lost depending on the frequency of the electromagnetic wave when an electromagnetic wave is incident on a low-E film (10) with a specific frequency electromagnetic wave blocking area (30) at an angle of incidence of 0 or 60 degrees. The x-axis represents the frequency of the input electromagnetic wave (unit: GHz) and the y-axis represents the degree of signal reduction (unit: dB). According to one embodiment of the present invention, a frequency of 3.5 GHz or lower, which is a commonly used frequency, can be set as the transmission band (200). Additionally, a frequency around 4.77 GHz, which is a commonly used 5G specialized network frequency band, can be set as the blocking band (210).

[0099] The graph (1300) illustrated in FIG. 7 shows the first to sixth embodiments (1310, 1320, 1330, 1340, 1350, 1360). The first embodiment (1310) has an electromagnetic wave incident at an angle of incidence of 0 degrees, and a specific frequency electromagnetic wave blocking region (30) is formed, but has a structure in which the third width (70) is larger than the first width (50) and the first width (50) is larger than the second width (60). The second embodiment (1320) has an electromagnetic wave incident at an angle of incidence of 0 degrees, and a specific frequency electromagnetic wave blocking region (30) is formed, and has a structure in which the first width (50) is larger than the second width (60) and the second width (60) is larger than the third width (70). The third embodiment (1330) has a structure in which electromagnetic waves are incident at an angle of incidence of 0 degrees, a specific frequency electromagnetic wave blocking area (30) is formed, and the second width (60) is larger than the first width (50) and the second width (60) is larger than the third width (70). The fourth embodiment (1340) has a structure in which electromagnetic waves are incident at an angle of incidence of 60 degrees, a specific frequency electromagnetic wave blocking area (30) is formed, but the third width (70) is larger than the first width (50) and the first width (50) is larger than the second width (60). The fifth embodiment (1350) has a structure in which electromagnetic waves are incident at an angle of incidence of 60 degrees, a specific frequency electromagnetic wave blocking area (30) is formed, and the second width (60) is larger than the first width (50) and the first width (50) is larger than the third width (70). The result of the sixth embodiment (1360) is that electromagnetic waves are incident at an angle of incidence of 60 degrees, a specific frequency electromagnetic wave blocking area (30) is formed, and the first width (50) is larger than the second width (60), and the second width (60) is larger than the third width (70).In Graph 1, in the case of the first implementation result (1310) and the fourth implementation result (1340) where the first width (50) of the specific frequency electromagnetic wave blocking area (30) is greater than the third width (70) and the second width (60) is not greater than the width (70) of the third bar area, it can be seen that electromagnetic waves are not blocked in the blocking band (210) where the electromagnetic wave loss should be greatest, and instead, the electromagnetic waves are blocked most in the transmission band (200). Accordingly, the condition that the first width (50) of the specific frequency electromagnetic wave blocking area (30) is greater than the third width (70) and the second width (60) is greater than the third width (70) must be satisfied in order to selectively transmit and block the electromagnetic waves of the target specific frequency.

[0100] FIG. 8 is a graph showing the TE mode loss of electromagnetic waves according to the angle of incidence when electromagnetic waves are incident on a low-E film to which a specific electromagnetic wave blocking pattern and a transmission pattern according to one embodiment of the present invention are applied.

[0101] Referring to FIG. 8, a graph (1400) is shown illustrating the loss of the TE mode component of an incident electromagnetic wave according to the angle of incidence, in a state where both a specific frequency electromagnetic wave transmission pattern (30) and a transmission pattern are formed in the transmission area (90) of the Roy film (10). The x-axis represents the frequency of the input electromagnetic wave (unit: GHz), and the y-axis represents the degree of signal reduction (unit: dB). At this time, the angle of incidence of the incident electromagnetic wave gradually increases between 0 degrees and 70 degrees (1410). As the angle of incidence increases, the degree of frequency blocking and the degree of loss increase, but regardless of the angle of incidence at which the electromagnetic wave is incident, the frequency is blocked the most in the blocking band (210), and in the transmission band (200), the electromagnetic wave is transmitted better than in the blocking band (210).

[0102] FIG. 9 is a graph showing the TE mode loss of electromagnetic waves according to the direction of incidence when electromagnetic waves are incident on a low-E film to which a specific electromagnetic wave blocking pattern and a transmission pattern according to one embodiment of the present invention are applied.

[0103] Referring to FIG. 9, a graph (1500) is shown illustrating the loss of the TE mode component of an electromagnetic wave incident from the front or a 45-degree diagonal direction according to the cases of incidence angles of 0 degrees and 60 degrees, in a state where both a specific frequency electromagnetic wave transmission pattern (30) and a transmission pattern are formed in the transmission area (90) of the Roy film (10). The x-axis is the frequency of the input electromagnetic wave (unit: GHz) and the y-axis is the degree of signal reduction (unit: dB).

[0104] The graph (1500) illustrated in FIG. 9 shows the 7th to 10th embodiment results (1510, 1520, 1530, 1540). The 7th embodiment result (1510) is the case where an electromagnetic wave is incident from the front at an angle of incidence of 0 degrees. The 8th embodiment result (1520) is the case where an electromagnetic wave is incident from a 45-degree angle direction at an angle of incidence of 0 degrees. The 9th embodiment result (1530) is the case where an electromagnetic wave incident from the front is incident at an angle of incidence of 60 degrees. The 10th embodiment result (1540) is the case where an electromagnetic wave is incident from a 45-degree angle direction at an angle of incidence of 60 degrees. Although there are differences in the degree of blocking and transmission depending on the direction and angle of incidence, it can be seen that the same transmission and blocking trend is observed for electromagnetic waves incident from all directions and all angles of incidence.

[0105] FIGS. 10a and 10b are three-dimensional views illustrating structures forming a low-E film and a pattern or conductive region on both sides of a glass according to different embodiments of the present invention.

[0106] FIG. 10a is a three-dimensional drawing illustrating a low-e pattern and glass formed with a double low-e structure.

[0107] Referring to FIG. 10a, a low-E film (10) may be formed on both sides of a glass (110). At this time, the patterns provided on the two films may be formed in the same shape and may be formed at corresponding positions. Although a fifth star-shaped pattern is illustrated as an example in the drawing, other star-shaped patterns may be formed. This low-E film (10) structure may be referred to as a double low-E structure (500). A PET layer (120) may be additionally provided between the glass (110) and the low-E film (10).

[0108] FIG. 10b is a three-dimensional drawing illustrating a low-e pattern and glass formed with a double sheet structure.

[0109] Referring to FIG. 10b, a low-E film (10) may be formed on one side of the glass (110). Additionally, a PET layer (120) may be formed on the opposite side of the glass (110), and the low-E film (10) may not be formed. In this state, a conductive region (140) may be formed on the PET layer (120) in the same shape as the specific frequency electromagnetic wave blocking region (30) of the low-E film (10). The conductive region may be made of a metal material or may be the low-E film (10). The conductive region (140) may be formed at a position corresponding to the specific frequency electromagnetic wave blocking region (30) on the opposite side of the glass (110). A PET layer (120) may be provided between the glass (110) and the low-E film (10). This structure may be referred to as a double sheet structure (600). In the drawing, the conductor region (140) corresponding to the specific frequency blocking region (30) is configured in the form of a fifth dagger-shaped pattern as an example, but this is merely an example and can be formed in the form of other blocking regions and transmission regions.

[0110] FIGS. 11a and 11b are graphs showing the degree of electromagnetic wave loss according to the angle of incidence of the TE mode component of an electromagnetic wave incident on a double-loi or double-sheet structure in each different embodiment of the present invention.

[0111] Figure 11a shows the degree to which the TE mode component of an electromagnetic wave is reduced when an electromagnetic wave is incident on a double-loi structure as a function of the angle of incidence.

[0112] FIG. 11a shows a graph (1600) illustrating the degree to which the TE mode component of an electromagnetic wave is reduced when an electromagnetic wave is incident on a double-low-e structure (500) according to the frequency of the electromagnetic wave. The x-axis represents the frequency of the input electromagnetic wave (unit: GHz), and the y-axis represents the degree to which the signal is reduced (unit: dB). As the angle of incidence increases from 0 degrees to 80 degrees (1610), the degree of transmission of the electromagnetic wave may decrease. When compared to the graph (1400), the double-low-e structure (500) can exhibit superior performance in terms of transmission in the transmission band (200) and blocking in the blocking band (210) compared to when the low-e film (10), which has a transmission pattern in the transmission area (90) and a specific frequency electromagnetic wave blocking pattern (30), is present only on one side of the glass (110). This is because the distribution of current formed on the upper and lower surfaces of the glass (110) by the double-low-e structure (500) is induced in opposite directions, so that the induced current caused by the incident electromagnetic waves can be further canceled out.

[0113] Figure 11b shows the degree to which the TE mode component of an electromagnetic wave is reduced when an electromagnetic wave is incident on a double sheet structure, depending on the angle of incidence.

[0114] FIG. 11b shows a graph (1700) plotted according to the frequency of the electromagnetic wave, showing the degree to which the TE mode component of the electromagnetic wave is reduced when the electromagnetic wave is incident on the double sheet structure (600). The x-axis represents the frequency of the input electromagnetic wave (unit: GHz), and the y-axis represents the degree to which the signal is reduced (unit: dB). It can be seen that as the angle of incidence increases from 0 degrees to 80 degrees (1710), the degree of transmission of the electromagnetic wave decreases. When compared with the graph (1400), the double sheet structure (600) can exhibit superior performance in terms of transmission in the transmission band (200) and blocking in the blocking band (210) compared to when the low-E film (10), which has a transmission pattern in the specific frequency electromagnetic wave blocking pattern (30) and a transmission pattern in the transmission area (90), is present on only one side of the glass (110). This is because the distribution of current formed on the upper and lower surfaces of the glass (110) of the double sheet structure (600) is induced in opposite directions, so the induced current caused by the incident electromagnetic waves can be further canceled out. Although the double sheet structure (600) has a slightly lower transmission capability in the transmission band (200) and a slightly lower blocking capability in the blocking band (210) compared to the double low-e structure (500), it can be more efficient in terms of the production process because it does not require a process of forming complex blocking and transmission patterns on the low-e film (10).

[0115] Figure 12 is an experimental result comparing the difference in user visibility of glass coated with a low-E film including a straight or curved pattern according to each embodiment.

[0116] Referring to FIG. 12, user visibility test result 1 (2000) can be observed when visible light is shone on glass with a low-E film that includes only a linear pattern, such as a grid pattern (1300), and user visibility test result 2 (3000) can be observed when visible light is shone on glass with a low-E film that includes a curved pattern, such as a flower pattern. In the case of test result 1 (2000), visible light is continuously reflected by the linear metal, creating an area (2100) where light scattering / spreading effects appear in the user's field of vision. On the other hand, in test result 2 (3000), it can be observed that there is almost no area where light scattering / spreading occurs in the user's field of vision. Accordingly, compared to the low-E film (10) structure with only a linear pattern, the low-E film (10) structure with added curved patterns can be effective for increasing user visibility and securing a field of vision.

[0117]

[0118] This publication has been described with reference to embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of this publication should be determined by the technical concept of the appended claims.

Claims

1. An insulating layer composed of an insulating material; and It includes a metal coating layer in which a metal or metal oxide is coated on one surface of the insulating layer, and The metal coating layer has a polygonal shape and includes a plurality of unit cells that are repeatedly arranged in rows and columns, and Each of the above plurality of unit cells includes patterns formed as a portion of the metal coating layer is removed, and The above patterns are, A blocking pattern forming a blocking region including the center of the unit cell to block electromagnetic waves of a specific frequency band; and A transmission pattern formed in a transmission area, which is an area excluding the blocking area of ​​the unit cell, for passing electromagnetic waves in a band other than the aforementioned specific frequency band, Roy Film.

2. In Paragraph 1, The metal coating layer comprises a plurality of unit cells that are square or rectangular in shape and are repeatedly arranged in rows and columns. Roy Film.

3. In Paragraph 1, The length of one side of the above unit cell is 1 / 4 of the wavelength of the center frequency of the above specific frequency band, Roy Film.

4. In Paragraph 3, The above blocking area is, A first square-shaped region formed at the center of the unit cell; and It includes a second, third, fourth, and fifth region of the same shape formed by extending from each side of the first region to each side of the unit cell, and Each of the second to fifth regions is characterized by having the largest width at the portion in contact with the first region, and as it extends along the side of the unit cell, the width becomes equal or smaller, and the width at the portion in contact with the side of the unit cell is the smallest. Roy Film.

5. In Paragraph 4, Each of the second to fifth regions is in the shape of an isosceles trapezoid, and the width decreases uniformly from the part in contact with the first region to the part in contact with the side of the unit cell. Roy Film.

6. In Paragraph 4, The blocking pattern forming each of the second to fifth regions is a curved shape in which the width decreases exponentially from the part in contact with the first region to the part in contact with the side of the unit cell. Roy Film.

7. In Paragraph 4, The above transmission pattern is formed to separate the transmission area into a plurality of transmission area pieces separated from each other. Roy Film.

8. In Paragraph 7, The above transmission pattern includes a boundary line pattern formed along a straight line or curve connecting the meeting point of two adjacent sides of the unit cell among the parts where the side of the blocking area and the unit cell meet. Roy Film.

9. In Paragraph 7, The above transmission pattern is, A straight line pattern formed between a first point dividing the above boundary line pattern in half and a second vanishing point set at the vertex of the above unit cell; A straight line pattern formed between a second point dividing the above boundary line pattern in a 1:3 ratio and the second vanishing point; A straight line pattern formed between the third point dividing the above boundary line pattern in a 3:1 ratio and the second vanishing point; A straight line pattern formed between the first point and the first vanishing point set at the point where two of the second to fifth regions meet; A straight line pattern formed between the second point and the first vanishing point; and A straight line pattern further comprising the third point and the first vanishing point. Roy Film.

10. In Paragraph 7, The above transmission pattern is, It includes two curve patterns formed between a first vanishing point set at the point where two of the second to fifth regions meet and a second vanishing point set at the vertex of the unit cell. Each of the two curve patterns above passes through the point that divides the boundary line pattern in a 1:2 ratio and the point that divides it in a 2:1 ratio, Roy Film.

11. In Paragraph 10, The above transmission pattern is, A further comprising one straight line pattern connecting the first vanishing point and the second vanishing point in a straight line, Roy Film.

12. In Paragraph 4, The above transmission pattern is, Two curved patterns and one straight line pattern formed between a first vanishing point set at the point where two of the second to fifth regions meet and a second vanishing point set at the vertex of the unit cell; A first boundary line pattern provided in the transmission area in the shape of a partial arc of a circle centered at the midpoint of the unit cell, with a diameter longer than the length of one side of the unit cell; and A second boundary line pattern provided in the transmission area in the shape of a partial arc of a circle centered on the second vanishing point, with a radius smaller than the straight distance to the first vanishing point. Roy Film.

13. In any one of paragraphs 9 through 12, After the first vanishing point is moved from the vertex of the unit cell in the direction of the blocking area by a preset length, or after the first vanishing point is moved from the vertex of the unit cell in the opposite direction of the blocking area by a preset length, the patterns are formed. Roy Film.

14. In any one of paragraphs 9 through 12, After the second vanishing point is moved by a preset length toward the center of the unit cell or the second vanishing point is moved by a preset length toward the opposite direction of the center of the unit cell, the patterns are formed. Roy Film.

15. In Paragraph 7, The above transmission pattern includes a grid pattern that divides the investment area into a grid shape, Roy Film.

16. Glass; A low-E film according to any one of claims 1 to 10 formed on the glass above, Roy Glass.

17. In Paragraph 16. A PET layer further comprising the above-mentioned low-E film and the above-mentioned glass, Roy Glass.

18. In Paragraph 16, The above low-E film is formed on both sides of the glass, Roy Glass.

19. In Paragraph 16, A low-E film is formed on one side of the glass, and a conductor region of the same shape is formed on the other side of the glass at a position corresponding to a blocking region formed in the low-E film. Roy Glass.

Images