Transparent display device and method for manufacturing transparent display device

Abstract

A transparent display device according to the present disclosure comprises a base substrate and a plurality of transparent display modules tiled on the base substrate, wherein each of the plurality of transparent display modules comprises a wiring pattern area and a transparent area excluding the wiring pattern area, a seam between adjacent transparent display modules among the plurality of transparent display modules is filled with an optical characteristic matching material, and a visually simulated pattern is formed in at least a part of the seam corresponding to the wiring pattern area.

Description

Transparent display device and method for manufacturing a transparent display device

[0001] The disclosed invention relates to a transparent display device composed of a plurality of transparent display modules tiled together and a method for manufacturing the same.

[0002] Display devices can be classified into self-emissive displays, where each pixel emits light on its own, and light-emitting displays, which require a separate light source.

[0003] Liquid Crystal Displays (LCDs) are representative light-emitting displays that require a backlight unit to supply light from the back of the display panel, a liquid crystal layer to act as a switch to pass or block light, and a color filter to convert the supplied light into the desired color. Because of this, they are structurally complex and have limitations in achieving thin thicknesses.

[0004] On the other hand, self-emissive displays, in which each pixel is equipped with a light-emitting element to emit light independently, do not require components such as backlight units and liquid crystal layers, and can also omit color filters. This results in a structurally simple design that offers high design freedom. Furthermore, not only can a thin thickness be achieved, but excellent contrast ratio, brightness, and viewing angle can also be realized.

[0005] Among self-emissive displays, micro LED displays are composed of multiple LEDs with a size in the micro range. Compared to LCDs that require a backlight, micro LED displays can provide excellent contrast, excellent response time, and excellent energy efficiency.

[0006] In addition, when using micro LEDs, transparent display devices can be manufactured because the area occupied by wiring and LEDs can be minimized.

[0007] Due to technical and economic limitations in manufacturing large transparent display devices as a single panel, tiling multiple transparent display modules is being proposed as an alternative. In this tiling method, the seams between the transparent display modules may be visually visible.

[0008] According to the present disclosure, a transparent display device in which the gap between a plurality of transparent display modules is not visible and a method for manufacturing the same are provided.

[0009] According to the present disclosure, a transparent display device capable of facilitating electrical connections between a plurality of transparent display modules as needed, and a method for manufacturing the same are provided.

[0010] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0011] A transparent display device according to one embodiment of the present disclosure comprises a base substrate and a plurality of transparent display modules tiled on the base substrate, wherein each of the plurality of transparent display modules includes a wiring pattern area and a transparent area excluding the wiring pattern area, and a seam between adjacent transparent display modules among the plurality of transparent display modules is filled with an optical property matching material, and a visual simulation pattern may be formed in at least a portion of the seam corresponding to the wiring pattern area.

[0012] A method for manufacturing a transparent display device according to one embodiment of the present disclosure may include: tiling a plurality of transparent display modules on a base substrate; filling a seam between adjacent transparent display modules among the plurality of transparent display modules with an optical property matching material; and forming a visual simulation pattern in at least a portion of the seam corresponding to a wiring pattern area of ​​the transparent display module.

[0013] FIGS. 1 and FIGS. 2 illustrate an example of the appearance of a transparent display device according to one embodiment.

[0014] FIG. 3 is a flowchart illustrating an example of a method for manufacturing a transparent display device according to one embodiment.

[0015] FIG. 4 is a drawing for explaining the process of tiling a plurality of transparent display modules on a base substrate according to a method for manufacturing a transparent display device according to one embodiment.

[0016] FIG. 5 is a drawing for explaining the process of forming a visual simulation pattern in at least a portion of the gap after filling the gap between transparent display modules with an optical property matching material, according to a method for manufacturing a transparent display device according to one embodiment.

[0017] FIG. 6 is a drawing for explaining the process of forming a visual simulation pattern in at least a portion of the gap between transparent display modules and then filling the gap between transparent display modules with an optical property matching material, according to a method for manufacturing a transparent display device according to one embodiment.

[0018] FIG. 7 is a drawing for explaining a pixel area, a wiring pattern area, and a transparent area included in a transparent display device according to one embodiment.

[0019] FIG. 8 is a drawing illustrating an example of a process of filling the gap between transparent display modules with an optical property matching material according to a method for manufacturing a transparent display device according to one embodiment.

[0020] FIG. 9 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of an optical property matching material according to a method for manufacturing a transparent display device according to one embodiment.

[0021] FIG. 10 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of an optical film placed on a plurality of display modules according to a method for manufacturing a transparent display device according to one embodiment.

[0022] FIG. 11 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of a base substrate according to a method for manufacturing a transparent display device according to one embodiment.

[0023] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0024] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0025] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0026] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0027] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0028] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0029] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0030] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0032] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0033] Hereinafter, embodiments according to the present invention will be described with reference to the attached drawings.

[0034] FIGS. 1 and FIGS. 2 illustrate an example of the appearance of a transparent display device according to one embodiment.

[0035] A transparent display device (1) according to one embodiment may be a self-emissive display device in which a light-emitting element is arranged for each pixel, so that each pixel can emit light on its own. Therefore, unlike a liquid crystal display device, it does not require components such as a backlight unit or a liquid crystal layer, so a thin thickness can be achieved, and various design changes are possible due to the simple structure.

[0036] In addition, the transparent display device (1) according to one embodiment may employ an inorganic light-emitting diode, such as an inorganic light-emitting diode, as a light-emitting element placed in each pixel. The inorganic light-emitting diode has a faster response speed compared to an organic light-emitting diode, such as an OLED, and can achieve high brightness with low power consumption.

[0037] In addition, unlike organic light-emitting diodes, which are vulnerable to exposure to moisture and oxygen, require an encapsulation process, and have poor durability, it does not require an encapsulation process and has strong durability. Hereinafter, the inorganic light-emitting diode mentioned in the embodiments described below refers to an inorganic light-emitting diode.

[0038] The inorganic light-emitting element employed in the transparent display device (1) according to one embodiment may be a micro LED having a short side length of approximately 100 μm, approximately tens of μm, or several μm. In this way, by employing a micro LED, the pixel size can be reduced and high resolution can be achieved within the same screen size.

[0039] In addition, manufacturing LED chips in micro-sized units can solve the problem of inorganic materials breaking when bent due to their characteristics. That is, if micro LED chips are transferred onto a flexible substrate, the LED chips do not break even if the substrate is bent, making it possible to realize flexible display devices.

[0040] A display device employing micro LEDs can be applied in various fields by utilizing ultra-small pixel size and thin thickness. For example, as shown in FIG. 1, a large-area screen can be realized by tiling a plurality of display modules (10) on which a plurality of micro LEDs are transferred and fixing them to a base substrate (20), and such a large-area screen display device can be used as signage, an electronic display board, etc.

[0041] Alternatively, based on the feature that it can be implemented flexibly, it is also possible to implement it as a foldable display device or a rollable display device.

[0042] In addition, as shown in FIG. 2, the transparent display device (1) allows not only the image displayed on the transparent display device (1) but also objects beyond the image to be seen by arranging a plurality of transparent display modules (10) on a transparent base substrate (20).

[0043] A transparent display device (1) according to one embodiment does not require a backlight unit, a liquid crystal layer, or an encapsulation layer, and only requires a micro LED, a driving circuit and wiring for driving it, so it is more advantageous for securing the aperture ratio, which is an important factor in the implementation of the transparent display device (1).

[0044] Meanwhile, the three-dimensional coordinate system of the XYZ axes shown in FIGS. 1 and 2 is based on the transparent display device (1), the plane where the screen of the transparent display device (1) is located is the XZ plane, and the direction in which the image is output or the direction of light emission of the inorganic light-emitting element is the +Y direction. Since the coordinate system is based on the transparent display device (1), the same coordinate system can be applied whether the transparent display device (1) is lying down or standing up.

[0045] Generally, the transparent display device (1) is used in an upright position, and the user views the image from the front of the transparent display device (1), so the +Y direction in which the image is output can be called the front, and the opposite direction can be called the rear.

[0046] In addition, the transparent display device (1) is generally manufactured in a lying position. Therefore, it is possible to refer to the -Y direction of the transparent display device (1) as the lower direction and the +Y direction as the upper direction. That is, in the embodiment described below, the +Y direction may be referred to as the upper direction or the front, and the -Y direction may be referred to as the lower direction or the rear.

[0047] The remaining four sides, excluding the top and bottom surfaces of the flat transparent display device (1) or transparent display module (10), are all referred to as sides regardless of the orientation of the transparent display device (1) or transparent display module (10).

[0048] In the example of FIG. 1, a case is illustrated in which a transparent display device (1) includes a plurality of display modules to implement a large-area screen, but the embodiment of the transparent display device (1) is not limited thereto. It is also possible for the transparent display device (1) to include a single display module (10) to be implemented as a TV, a wearable device, a portable device, a PC monitor, etc.

[0049] A transparent display device (1) may be composed of a plurality of pixels arranged in two dimensions. A single pixel may be composed of at least three subpixels that output light of different colors. For example, a single pixel may include a red subpixel that outputs red light, a green subpixel that outputs green light, and a blue subpixel that outputs blue light.

[0050] It is possible for subpixels to be arranged along the X-axis or the Z-axis, or not arranged in a linear fashion. Additionally, it is possible for the sizes of the subpixels to be implemented differently. A single pixel only needs to contain multiple subpixels to represent multiple colors, and there are no restrictions on the size or arrangement method of each individual subpixel.

[0051] Furthermore, a pixel does not necessarily have to be composed of a red subpixel emitting red light, a green subpixel emitting green light, and a blue subpixel emitting blue light; it is also possible to include subpixels emitting yellow or white light. In other words, there are no restrictions on the color or type of light emitted from each subpixel, or on the number of subpixels.

[0052] However, for the sake of specific explanation in the embodiments described below, the case in which the pixel is composed of a red subpixel, a green subpixel, and a blue subpixel will be described as an example.

[0053] As previously mentioned, the display module (10) and the transparent display device (1) according to one embodiment are self-emissive display devices in which each pixel can emit light on its own. Accordingly, an inorganic light-emitting element emitting light of a different color may be disposed in each subpixel. For example, a red inorganic light-emitting element may be disposed in the red subpixel, a green inorganic light-emitting element may be disposed in the green subpixel, and a blue inorganic light-emitting element may be disposed in the blue subpixel.

[0054] Accordingly, in the present embodiment, the pixel may represent a cluster including a red inorganic light-emitting element, a green inorganic light-emitting element, and a blue inorganic light-emitting element, and the subpixel may represent each inorganic light-emitting element.

[0055] FIG. 3 is a flowchart illustrating an example of a method for manufacturing a transparent display device according to one embodiment.

[0056] Referring to FIG. 3, a method for manufacturing a transparent display device (1) may include the step (1000) of tiling a plurality of transparent display modules (10) on a base substrate (20).

[0057] In the present invention, the base substrate (20) may be referred to as a mother substrate, main substrate, unified substrate, etc., in the sense that a plurality of transparent display modules (10) are mounted thereon, and may also be referred to as a transparent substrate in the sense that it is transparent. However, in this specification, the term base substrate (20) is used for the substrate on which a plurality of transparent display modules (10) are mounted in order to distinguish it from the transparent substrate (11, see FIG. 8) that includes the transparent display modules (10).

[0058] In the present invention, tiling a plurality of transparent display modules (10) may be referred to by expressions such as arranging a plurality of transparent display modules (10).

[0059] A plurality of transparent display modules (10) may be arranged in a matrix form on a base substrate (20). For example, as shown in FIG. 1, a plurality of transparent display modules (10) may be tiled in a 2X4 array, but the arrangement form of the plurality of transparent display modules (10) included in the transparent display device (1) of the present invention is not limited thereto.

[0060] The step (1000) of tiling a plurality of transparent display modules (10) on a base substrate (20) may include tiling the plurality of transparent display modules (10) based on the positions of visual indicators (e.g., id1 and id2 of FIG. 8) provided on the base substrate (20).

[0061] For example, the step (1000) of tiling a plurality of transparent display modules (10) on a base substrate (20) may include the step of recognizing the positions of visual indicators (e.g., id1 and id2 of FIG. 8) provided on the base substrate (20) and mounting the transparent display modules (10) at positions corresponding to those positions.

[0062] A method for manufacturing a transparent display device (1) may include a step (1100) of filling an optical property matching material into the gap (seam) between transparent display modules (10).

[0063] In the present invention, the term 'filling' may be replaced with various terms such as 'application', 'injection', 'insertion', 'filling', 'replenishment', etc.

[0064] In the present invention, the term 'gap' can be replaced with various terms such as 'gap', 'crack', 'boundary region', 'joint', etc.

[0065] The optical property matching material is a material used to fill the gaps (seams) between transparent display modules (10), and by minimizing visual discontinuity between transparent display modules (10), the uniform appearance of the transparent display device (1) can be maintained.

[0066] The optical property matching material can be selected as a material having optical properties similar to the optical properties of the transparent display module (10). Here, the optical properties of the transparent display module (10) may refer to the optical properties of the transparent region.

[0067] Optical properties may include color and refractive index.

[0068] In one embodiment, the optical property matching material may be selected as a material in which the color difference (△E*ab) with the transparent display module (10) is less than or equal to a predetermined value.

[0069] For example, the optical property matching material may have a color difference (△E*ab) with the transparent display module (10) of 0.8 or less.

[0070] In one embodiment, the optical property matching material may be selected as a material in which the difference in refractive index (△RI) with the transparent display module (10) is less than or equal to a predetermined value.

[0071] For example, the optical property matching material may have a refractive index difference (△RI) of 0.01 or less with the transparent display module (10).

[0072] In one embodiment, the optical property matching material may be selected as a material in which the color difference (△E*ab) with the transparent display module (10) is less than or equal to a predetermined value and the refractive index difference (△RI) with the transparent display module (10) is also less than or equal to a predetermined value.

[0073] The color difference (△E*ab) is It can be expressed as follows. Here, △L represents the difference in brightness, △a represents the difference along the red-green axis, and △b represents the difference along the yellow-blue axis.

[0074] However, the methods for representing color difference are not limited to this, and it goes without saying that various methods can be utilized to calculate color difference and various parameters related to color difference can be used.

[0075] The difference in refractive index (△RI) can be expressed as |n1 - n₂| and represents the magnitude of the difference in refractive index between two elements being compared.

[0076] In this way, the optical property matching material is adjusted so that its color and refractive index are very similar to those of the transparent display module (10), thereby preventing the user from visually perceiving the gap between the transparent display modules (10).

[0077] In one embodiment, during the manufacturing process of a transparent display module (10), a transparent area (TA, see FIG. 5) may be covered by a protective film.

[0078] In the present invention, selecting an optical property matching material that is similar to the optical properties of a transparent region may include selecting an optical property matching material that is similar to the optical properties of a transparent region when the transparent region is covered by a protective film (18, see FIG. 8).

[0079] A method for manufacturing a transparent display device (1) may include the step (1200) of forming a visual simulation pattern (VM, see FIG. 5) in at least a portion of a gap corresponding to a wiring pattern area (BA, see FIG. 5) of a transparent display module (10).

[0080] The visual imitation pattern (VM) may refer to a structure created to visually mimic the wiring pattern area (BA) of the transparent display module (10). The primary purpose of the visual imitation pattern (VM) is to minimize visual discontinuities that may occur in the seams between the tiled transparent display modules (10).

[0081] To this end, the optical properties of the visual simulation pattern (VM) can be designed to be similar to the optical properties of the wiring pattern area (BA).

[0082] The visual simulation pattern (VM) can be formed so that its optical properties mimic the optical properties of the wiring pattern area (BA).

[0083] In one embodiment, the color difference (△E*ab) between the visual simulation pattern (VM) and the wiring pattern area (BA) may be less than or equal to a predetermined value.

[0084] In one embodiment, the difference in reflectance between the visual simulation pattern (VM) and the wiring pattern area (BA) may be less than or equal to a predetermined value.

[0085] In one embodiment, the visual simulation pattern (VM) may be formed such that the color difference (△E*ab) with respect to the wiring pattern area (BA) is less than or equal to a predetermined value, and the difference in reflectance with respect to the wiring pattern area (BA) is less than or equal to a predetermined value.

[0086] In one embodiment, during the manufacturing process of the transparent display module (10), the wiring pattern area (BA) may be black-masked. By black-masking the wiring pattern area (BA), the electronic circuit provided in the wiring pattern area (BA) can be hidden while maximizing the effect of the transparent portion.

[0087] In the present invention, forming a visual simulation pattern (VM) to be similar to the optical characteristics of a wiring pattern area (BA) may include forming the visual simulation pattern (VM) to be similar to the optical characteristics of a black-masked wiring pattern area (BA).

[0088] In one embodiment, during the manufacturing process of a transparent display module (10), a wiring pattern area (BA) can be covered by a protective film after being black-masked.

[0089] In the present invention, forming a visual simulation pattern (VM) to be similar to the optical characteristics of a wiring pattern area (BA) may include forming the visual simulation pattern (VM) to be similar to the optical characteristics of a black-masked wiring pattern area (BA) covered by a protective film.

[0090] In the present invention, the visual simulation pattern (VM) may be referred to by terms such as a masking pattern in that it is a pattern for visually simulating a wiring pattern area (BA).

[0091] As will be explained below, visual simulation patterns (VMs) can be formed at various locations by various methods.

[0092] According to the present invention, by forming a visual simulation pattern (VM) along with an optical property matching material in the gap between transparent display modules (10), visual discontinuity occurring in the gap between transparent display modules (10) can be minimized.

[0093] Meanwhile, the order of the processes (1000, 1100, and 1200) illustrated in FIG. 3 may be changed. For example, step 1200 may precede step 1000.

[0094] In one embodiment, if step 1200 precedes step 1000, the portion corresponding to 'at least a portion of the gap corresponding to the wiring pattern area (BA) of the transparent display module (10)' can be identified by visual indicators (e.g., id1 and id2 of FIG. 8) provided on the base substrate (20).

[0095] Hereinafter, a method for manufacturing a transparent display device (1) according to one embodiment and elements of a transparent display device (1) according to one embodiment will be described in more detail with reference to FIGS. 4 to 11.

[0096] FIG. 4 is a drawing for explaining the process of tiling a plurality of transparent display modules on a base substrate according to a method for manufacturing a transparent display device according to one embodiment.

[0097] Referring to FIG. 4, a plurality of transparent display modules (10) can each be produced individually and tiled onto a single base substrate (20) (1000 of FIG. 3).

[0098] A transparent display module (10) may include a transparent substrate (11, see FIG. 8), a wiring pattern area (BA) formed on the transparent substrate (11), and a transparent area (TA) excluding the wiring pattern area (BA).

[0099] The transparent substrate (11) can generally be made of glass or a transparent plastic material (e.g., polycarbonate, PET, etc.).

[0100] The transparent substrate (11) has high light transmittance and durability and can serve as a basic support for the components of the transparent display module (10).

[0101] The wiring pattern area (BA) may include a Thin Film Transistor (TFT) layer and various wirings (e.g., data lines, gate lines, power lines, etc.).

[0102] A light-emitting element may be provided in the wiring pattern area (BA), and the light-emitting element may be turned on or turned off by the TFT layer and various wirings (e.g., data lines, gate lines, power lines, etc.).

[0103] The TFT layer may include a transistor circuit for individually controlling light-emitting elements provided on the wiring pattern area (BA).

[0104] Various wirings can transmit various electrical signals (e.g., data signals, gate signals, power signals) to the light-emitting element.

[0105] The remaining area of ​​the transparent substrate (11), excluding the wiring pattern area (BA), can be referred to as the transparent area (TA).

[0106] Since the transparent region (TA) does not contain elements for driving the light-emitting element, it can have a relatively high light transmittance.

[0107] When a plurality of transparent display modules (10) are tiled on a base substrate (20), a gap may be formed between adjacent transparent display modules (10a, 10b).

[0108] Although the transparent display modules (10a, 10b) in FIG. 4 are shown as being adjacent to each other in the row direction, the description of the transparent display modules (10a, 10b) can, of course, also be applied to examples where they are adjacent to each other in the column direction.

[0109] FIG. 5 is a drawing for explaining the process of forming a visual simulation pattern in at least a portion of the gap after filling the gap between transparent display modules with an optical property matching material, according to a method for manufacturing a transparent display device according to one embodiment. FIG. 6 is a drawing for explaining the process of filling the gap between transparent display modules with an optical property matching material after forming a visual simulation pattern in at least a portion of the gap between transparent display modules, according to a method for manufacturing a transparent display device according to one embodiment.

[0110] Referring to FIGS. 5 and 6, a transparent display module (10) according to one embodiment includes a wiring pattern area (BA) and a transparent area (TA), and may include a pixel (PX) provided in the wiring pattern area (BA) and including at least one light-emitting element (15).

[0111] A gap (SA) can be formed between the transparent display modules (10).

[0112] The gap (SA) can refer to the entire space between the transparent display modules (10).

[0113] The gap (SA) may include a portion corresponding to the transparent area (TA) and a portion corresponding to the wiring pattern area (BA).

[0114] Referring to FIG. 5, a method for manufacturing a transparent display device (1) according to one embodiment may include the step of forming a visual simulation pattern (VM) in at least a portion of the gap corresponding to a wiring pattern area (BA) after filling the gap (SA) between transparent display modules (10) with an optical property matching material.

[0115] Even if an optical property matching material is filled into the gap (SA) between the transparent display modules (10), if a visual simulation pattern (VM) is not formed, at least a portion of the gap corresponding to the wiring pattern area (BA) impedes the visual continuity between the transparent display modules (10).

[0116] According to the present invention, by filling the gap (SA) between transparent display modules (10) with an optical property matching material and forming a visual simulation pattern (VM) in at least a part of the gap (SA) corresponding to a wiring pattern area (BA), the visual continuity between transparent display modules (10) can be maximized.

[0117] Referring to FIG. 6, a method for manufacturing a transparent display device (1) according to one embodiment may include the step of forming a visual simulation pattern (VM) in at least a part of a gap (SA) corresponding to a wiring pattern area (BA), and then filling the gap (SA) between transparent display modules (10) with an optical property matching material.

[0118] Even if a visual simulation pattern (VM) is formed in at least a portion of the gap (SA) corresponding to the wiring pattern area (BA), if the gap (SA) between the transparent display modules (10) is not filled with an optical property matching material, the gap (SA) between the transparent display modules (10) impedes the visual continuity between the transparent display modules (10).

[0119] According to the present invention, by forming a visual simulation pattern (VM) in at least a portion of the gap (SA) corresponding to the wiring pattern area (BA) and filling the gap (SA) between the transparent display modules (10) with an optical property matching material, the visual continuity between the transparent display modules (10) can be maximized.

[0120] FIG. 7 is a drawing for explaining a pixel area, a wiring pattern area, and a transparent area included in a transparent display device according to one embodiment.

[0121] Referring to FIG. 7, a transparent display module (10) according to one embodiment may include a plurality of pixel regions (PA) arranged in a matrix form.

[0122] Each of the multiple pixel regions (PA) may include a transparent region (TA) and a wiring pattern region (BA).

[0123] In each of the plurality of pixel regions (PA), a wiring pattern region (BA) may be provided with a pixel (Px) including at least one light-emitting element (15).

[0124] When multiple pixel areas (PA) are arranged in a matrix form, the wiring pattern area (BA) in the transparent display module (10) can be arranged in a two-dimensional grid shape.

[0125] The two-dimensional grid shape may be composed of first grids (FL) extending in a first direction and second grids (SL) extending in a second direction that intersects the first direction.

[0126] 'Grid' may be referred to by terms such as 'wiring, wiring pattern, track, wiring area'.

[0127] For convenience of explanation, the first direction is defined as the horizontal direction and the second direction is defined as the vertical direction based on Fig. 7.

[0128] A pixel area (PA) may include a transparent area (TA), a first grid (FL) provided at a first edge of the transparent area (TA), and a second grid (SL) provided at a second edge intersecting the first edge of the transparent area (TA).

[0129] Assuming that the edge length of the pixel area (PA) is b, that is, assuming the pixel pitch is b, and assuming that the aperture ratio of the transparent display module (10) is a, the area of ​​the wiring pattern area (BA) within the pixel area (PA) is It can be determined as.

[0130] In the case of a general transparent display module (10), the aperture ratio is within the range of 0.5 to 0.95.

[0131] In the production process of the transparent display module (10), the pixel pitch (b) and aperture ratio (a) of the transparent display module (10) can be predetermined as elements of the production specifications.

[0132] In addition, the ratio between the width of the first grid (FL) and the width of the second grid (SL) of the transparent display module (10) can also be predetermined as an element of the production specifications of the transparent display module (10).

[0133] If the pixel pitch (b) and aperture ratio (a) of the transparent display module (10) are known, the width (RW) of the first grid (FL) and the width (CW) of the second grid (SL) can be calculated by the following [Equation 1].

[0134] [Formula 1]

[0135] Meanwhile, the spacing (d) between the first grids (FL) spaced apart from each other in the second direction may be the same as the pixel pitch (b), and the spacing between the second grids (SL) spaced apart from each other in the first direction may also be the same as the pixel pitch (b).

[0136] The width (RW) of the first grid (FL) and the spacing (b) between the first grids (FL) can be utilized to form a visual simulation pattern (VM) in at least a portion of the gap (SA) between the transparent display modules (10) adjacent to each other in the first direction.

[0137] The width (CW) of the second grid (SL) and the spacing (b) between the second grids (SL) can be utilized to form a visual simulation pattern (VM) in at least part of the gap (SA) between the transparent display modules (10) adjacent to each other in the second direction.

[0138] The method of using the width (RW) of the first grid (FL) to form a visual representation pattern (VM) in at least part of the gap (SA) between adjacent transparent display modules (10) in the first direction may be the same as the method of using the width (CW) of the second grid (SL) to form a visual representation pattern (VM) in at least part of the gap (SA) between adjacent transparent display modules (10) in the second direction.

[0139] For example, to form a visual simulation pattern (VM), it is necessary to identify the location of at least a portion of the gap (SA) corresponding to the wiring pattern area (BA).

[0140] A visual simulation pattern (VM) must be formed between the first grids (FL) formed in the first transparent display module (10a) and the first grids (FL) formed in the second transparent display module (10b).

[0141] At least a portion of the gap (SA) corresponding to the wiring pattern area (BA) may represent the space between the first grids (FL) formed in the first transparent display module (10a) and the first grids (FL) formed in the second transparent display module (10b).

[0142] In one embodiment, the step (1200) of forming a visual simulation pattern (VM) may include forming the visual simulation pattern (VM) with a width equal to the width of each of the first grids (FL).

[0143] The width of the visual simulation pattern (VM) can be formed to be equal to the width (RW) of each of the first grids (FL).

[0144] In one embodiment, the step (1200) of forming a visual simulation pattern (VM) may include forming the visual simulation pattern (VM) at intervals equal to the intervals between the first grids (FL).

[0145] The visual simulation pattern (VM) can be formed at the same interval as the spacing (d) between the first grids (FL).

[0146] According to the present invention, the location of at least a portion of the gap (SA) corresponding to the wiring pattern area (BA) can be identified by using the width (RW) of each of the first grids (FL) and the spacing (d) between the first grids (FL), and accordingly, a visual simulation pattern (VM) can be formed only on at least a portion of the gap (SA) corresponding to the wiring pattern area (BA).

[0147] For example, the center point between visual indicators (e.g., id1 and id2 in FIG. 8) provided on the base substrate (20) may correspond to the center of the gap (SA), and the step (1200) of forming a visual representation pattern (VM) in at least a part of the gap (SA) corresponding to the wiring pattern area (BA) of the transparent display module (10) may include forming a visual representation pattern (VM) corresponding to the width (RW) of each of the first grids (FL) at each interval (d) between the first grids (FL) using the center point between the visual indicators (e.g., id1 and id2 in FIG. 8) as a reference point.

[0148] As another example, the center between light-emitting elements (15) included in adjacent pixel regions (PA) can be recognized through vision recognition. The center between light-emitting elements (15) included in adjacent pixel regions (PA) may correspond to the center of a gap (SA), and the step (1200) of forming a visual simulation pattern (VM) in at least a part of the gap (SA) corresponding to the wiring pattern region (BA) of the transparent display module (10) may include forming a visual simulation pattern (VM) corresponding to the width (RW) of each of the first grids (FL) at each interval (d) between the first grids (FL) using the center point between the light-emitting elements (15) included in adjacent pixel regions (PA) as a reference point.

[0149] In this case, the length of the visual simulation pattern (VM) may be shorter than the pixel pitch (b) and longer than the width of the gap (SA). By making the length of the visual simulation pattern (VM) longer than the width of the gap (SA), the continuity of optical properties extending from the wiring pattern area (BA) to the visual simulation pattern (VM) can be maintained.

[0150] According to the present invention, even after filling the gap (SA) between transparent display modules (10) with an optical property matching material, the location where a visual simulation pattern (VM) is to be formed (or the target location for the formation of the visual simulation pattern (VM)) can be accurately identified.

[0151] According to the present invention, a visual simulation pattern (VM) can be formed in advance on a base substrate (20) even before tiling a transparent display module (10) on a base substrate (20).

[0152] FIG. 8 is a drawing illustrating an example of a process of filling the gap between transparent display modules with an optical property matching material according to a method for manufacturing a transparent display device according to one embodiment.

[0153] Referring to FIG. 8, according to a method for manufacturing a transparent display device (1) according to one embodiment, after tiling a plurality of transparent display modules (10) on a base substrate (20), a view (100) of a gap (SA) portion viewed from the side is shown.

[0154] The base substrate (20) may include a transparent layer (21) that serves as a main structural support of the base substrate (20), an optical film (22) provided on one side of the transparent layer (21) and used to improve the optical performance of the transparent display module (10), and an adhesive layer (23) provided on the other side of the transparent layer (21) and used to bond the transparent display module (10) to the base substrate (20).

[0155] The optical film (22) may include various films to improve optical performance, such as an anti-reflective film and a transparent conductive film.

[0156] The adhesive layer (23) may include a transparent adhesive.

[0157] The transparent layer (21) may include a glass substrate.

[0158] Visual indicators (id1, id2) may be provided on the edge of the transparent layer (21), and as described above, the visual indicators (id1, id2) may be used to identify the center of the gap (SA).

[0159] Transparent display modules (10) can be provided on the base substrate (20).

[0160] A gap (SA) can be formed between the transparent display modules (10).

[0161] Each of the transparent display modules (10) may include a transparent substrate (11), a wiring pattern area (BA) formed on the transparent substrate (11), a light-emitting element (15) provided on the wiring pattern area (BA), and a protective film (18) for protecting the light-emitting element (15) from the outside by covering the wiring pattern area (BA).

[0162] The protective film (18) can protect the light-emitting element from the external environment and can be composed of a transparent film while maintaining optical performance.

[0163] The step (1100) of filling the gap (SA) between the transparent display modules (10) with an optical property matching material may include the step of performing plasma surface treatment on the gap (SA).

[0164] By performing plasma surface treatment on the gap (SA), the optical property matching material can be effectively permeated into the gap (SA).

[0165] The step (1100) of filling the gap (SA) between the transparent display modules (10) with an optical property matching material may include the step of filling the gap (SA) with at least one type of resin.

[0166] At least one type of resin may be selected to have optical properties that match those of the protective film (18) and / or the transparent substrate (11).

[0167] For example, at least one type of resin may include a type of resin in which the optical properties of both the protective film (18) and the transparent substrate (11) are matched. Matching the optical properties of both the protective film (18) and the transparent substrate (11) may mean that the difference in optical properties with the protective film (18) is less than or equal to a predetermined value, and the difference in optical properties with the transparent substrate (11) is also less than or equal to a predetermined value.

[0168] In this case, the step (1100) of filling the gap (SA) between the transparent display modules (10) with an optical property matching material may include filling the gap (SA) with one type of resin.

[0169] As another example, different types of resins (R1, R2) can be filled into the gap (SA) between the transparent display modules (10) as shown in FIG. 8.

[0170] It shows a view (200) in which different types of resins (R1, R2) are filled into the gap (SA) between transparent display modules (10).

[0171] At least one type of resin may include a first resin (R1) that matches the optical properties with a transparent substrate (11) and a second resin (R2) that matches the optical properties with a protective film (18).

[0172] In this case, the step (1100) of filling the gap (SA) between the transparent display modules (10) with an optical property matching material may include first filling the gap (SA) with a first resin (R1) and then filling it with a second resin (R2).

[0173] The resin (R1, R2) filled in the gap (SA) is in liquid form and can be cured by ultraviolet light.

[0174] The step (1100) of filling the gap (SA) between the transparent display modules (10) with an optical property matching material may include the step of filling the gap (SA) with resin (R1, R2) and then irradiating with ultraviolet light.

[0175] In one embodiment, the second resin (R2) is selected to yellow when exposed to ultraviolet light, so that when exposed to ultraviolet light, it hardens and yellows, and the color difference with the protective film (18) can be less than a predetermined value.

[0176] In one embodiment, the first resin (R1) is selected so as not to yellow due to ultraviolet light, and when ultraviolet light is irradiated, it hardens and the color difference with the transparent substrate (11) can be less than a predetermined value.

[0177] The resin (R1, R2) may be selected such that the difference in refractive index with the protective film (18) and / or glass substrate (11) is less than a predetermined value.

[0178] A transparent display device (300) in which an optical property matching material is filled in the gap (SA) can be provided by the step (1100) of filling the gap (SA) between transparent display modules (10) with an optical property matching material.

[0179] A method for manufacturing a transparent display device (1) may include the step of forming a visual simulation pattern (VM) in at least a portion of the gap (SA) corresponding to a wiring pattern area (BA) for a transparent display device (300) in which an optical property matching material is filled in the gap (SA) (1200).

[0180] The following describes a method for manufacturing a transparent display device (400) in which a visual simulation pattern (VM) is formed on at least a portion of a gap (SA).

[0181] FIG. 9 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of an optical property matching material according to a method for manufacturing a transparent display device according to one embodiment.

[0182] Referring to FIG. 9, the step of forming a visual simulation pattern (VM) in at least a portion of the gap (SA) corresponding to the wiring pattern area (BA) may include the step of performing surface treatment on the optical property matching material.

[0183] When surface treatment is performed on an optical property matching material, a visual simulation pattern (VM) can be formed on the optical property matching material.

[0184] In this case, the transparent display device (400a) may include a visual simulation pattern (VM) formed on an optical property matching material.

[0185] Surface treatment for the optical property matching material may include, for example, irradiating the optical property matching material with a laser (LS).

[0186] When a laser (LS) is irradiated onto an optical property matching material, the resin is carbonized, and its optical properties can become similar to those of the wiring pattern area (BA).

[0187] The control parameters of the laser (LS) (e.g., irradiation intensity, focusing position) can be pre-set as parameters that make the carbonized portion of the optical property matching material similar to the optical properties of the wiring pattern area (BA).

[0188] As previously described, step 1200 may include forming a visual simulation pattern (VM) corresponding to the width (RW) of each of the first grids (FL) at intervals (d) between the first grids (FL), starting from the center point between the visual indicators (id1, id2) formed on the base substrate (20) or the center point between the light-emitting elements (15) through vision recognition.

[0189] According to one embodiment of the present invention, when a visual simulation pattern (VM) is formed on an optical property matching material, there is a technical effect of being able to form the visual simulation pattern (VM) at a more accurate location.

[0190] FIG. 10 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of an optical film placed on a plurality of display modules according to a method for manufacturing a transparent display device according to one embodiment.

[0191] Referring to FIG. 10, step 1200 may include performing surface treatment on an optical film (30) provided on a transparent display device (300) in which an optical property matching material is filled in a gap (SA).

[0192] Performing surface treatment on the optical film (30) may include forming a visual simulation pattern (VM) on the optical film (30).

[0193] Surface treatment for the optical film (30) may include at least one of laser marking treatment, ink application treatment, deposition treatment, or etching treatment.

[0194] By surface treatment of the optical film (30), a visual simulation pattern (VM) with optical properties similar to a wiring pattern area (BA) can be formed on the optical film (30).

[0195] Forming a visual simulation pattern (VM) on an optical film (30) may include forming a visual simulation pattern (VM) corresponding to the width (RW) of each of the first grids (FL) at intervals (d) between the first grids (FL).

[0196] The optical film (30) may be provided on the plurality of display modules after tiling the plurality of transparent display modules (10).

[0197] Step 1200 may include the step of providing an optical film (30) having a visual simulation pattern (VM) formed thereon on a transparent display device (300).

[0198] That is, step 1200 may include performing surface treatment on an optical film (30) and placing the surface-treated optical film (30) on a plurality of tiled transparent display modules (10).

[0199] In this case, the transparent display device (400b) may include a visual simulation pattern (VM) formed on an optical film (30).

[0200] According to one embodiment of the present invention, when a visual simulation pattern (VM) is formed on an optical film (30), there is a technical effect that the visual simulation pattern (VM) can be changed by replacing only the optical film (30) when necessary.

[0201] FIG. 11 is a drawing for explaining an example of a process of forming a visual simulation pattern through surface treatment of a base substrate according to a method for manufacturing a transparent display device according to one embodiment.

[0202] Referring to FIG. 11, step 1200 may include performing surface treatment on the base substrate (20). In this case, step 1200 may precede step 1000.

[0203] Surface treatment for the base substrate (20) may include at least one of laser marking treatment, ink application treatment, deposition treatment, or etching treatment.

[0204] By surface treatment of the base substrate (20), a visual simulation pattern (VM) with optical properties similar to a wiring pattern area (BA) can be formed on the base substrate (20).

[0205] Forming a visual simulation pattern (VM) on a base substrate (20) may include forming a visual simulation pattern (VM) corresponding to the width (RW) of each of the first grids (FL) at intervals (d) between the first grids (FL).

[0206] A method for manufacturing a transparent display device (1) according to one embodiment may include performing surface treatment on a base substrate (20) to form a visual simulation pattern (VM) on the base substrate (20), and then tiling a plurality of transparent display modules (10) on the base substrate (20) (1000).

[0207] When a plurality of transparent display modules (10) are tiled onto a base substrate (20), a transparent display device (100a) having a plurality of transparent display modules (10) tiled onto a base substrate (20) having a visual simulation pattern (VM) formed thereon can be provided.

[0208] When step 1100 is performed on a transparent display device (100a), the finally produced transparent display device (400c) may include a visual simulation pattern (VM) formed on a base substrate (20).

[0209] According to one embodiment of the present invention, when a visual simulation pattern (VM) is formed on a base substrate (20), the visual simulation pattern (VM) is created directly on the base substrate (20), thereby ensuring a uniform pattern for all transparent display modules (10) and providing a technical effect of high durability of the visual simulation pattern (VM).

[0210] Meanwhile, according to various embodiments, the visual simulation pattern (VM) may be implemented as a conductive pattern for electrically connecting the wiring pattern area (BA) between adjacent transparent display modules (10).

[0211] When the visual simulation pattern (VM) is implemented as a conductive pattern, the control signal received by one transparent display module (10) can be transmitted to another display module (10). Accordingly, when the visual simulation pattern (VM) is implemented as a conductive pattern, the number of ICs for controlling each transparent display module (10) can be reduced.

[0212] A transparent display device (1) according to one embodiment of the present invention comprises a base substrate (20) and a plurality of transparent display modules (10) tiled on the base substrate (20), each of the plurality of transparent display modules (10) comprises a wiring pattern area (BA) and a transparent area (TA) excluding the wiring pattern area (BA), and an optical property matching material is filled in the gap (SA) (seam) between adjacent transparent display modules (10) among the plurality of transparent display modules (10), and a visual simulation pattern (VM) may be formed in at least a part of the gap (SA) corresponding to the wiring pattern area (BA).

[0213] In one embodiment, the optical property matching material may have a color difference (△E*ab) with the transparent display module (10) of 0.8 or less.

[0214] In one embodiment, the optical property matching material may have a refractive index difference (△RI) of 0.01 or less with respect to the transparent display module (10).

[0215] In one embodiment, the visual simulation pattern (VM) may have a color difference (△E*ab) with the wiring pattern area (BA) of 0.8 or less.

[0216] In one embodiment, the wiring pattern area (BA) is arranged in a two-dimensional grid shape, and the two-dimensional grid shape may be composed of first grids (FL) extending in a first direction and second grids (SL) extending in a second direction intersecting the first direction.

[0217] In one embodiment, the width of the visual simulation pattern (VM) may be equal to the width of each of the first grids (FL).

[0218] In one embodiment, the visual simulation pattern (VM) can be formed with the same spacing as the spacing between the first grids (FL).

[0219] In one embodiment, a visual simulation pattern (VM) can be formed through surface treatment of an optical property matching material.

[0220] In one embodiment, a visual simulation pattern (VM) can be formed through surface treatment of the base substrate (20).

[0221] In one embodiment, the transparent display device (1) may further include an optical film (30) provided on a plurality of tiled transparent display modules (10).

[0222] In one embodiment, a visual simulation pattern (VM) can be formed through surface treatment of an optical film (30).

[0223] In one embodiment, the length of the visual simulation pattern (VM) may be longer than the width of the gap (SA).

[0224] A method for manufacturing a transparent display device (1) according to one embodiment may include: tiling a plurality of transparent display modules (10) on a base substrate (20); filling a gap (SA) (seam) between adjacent transparent display modules (10) among the plurality of transparent display modules (10) with an optical property matching material; and forming a visual simulation pattern (VM) in at least a portion of the gap (SA) corresponding to a wiring pattern area (BA) of a transparent display module (10).

[0225] In one embodiment, the optical property matching material may have a color difference (△E*ab) with the transparent display module (10) of 0.8 or less.

[0226] In one embodiment, the optical property matching material may have a refractive index difference (△RI) of 0.01 or less with respect to the transparent display module (10).

[0227] In one embodiment, the visual simulation pattern (VM) may have a color difference (△E*ab) with the wiring pattern area (BA) of 0.8 or less.

[0228] In one embodiment, the wiring pattern area (BA) is arranged in a two-dimensional grid shape, and the two-dimensional grid shape may be composed of first grids (FL) extending in a first direction and second grids (SL) extending in a second direction intersecting the first direction.

[0229] In one embodiment, the step of forming a visual simulation pattern (VM) may include the step of forming a visual simulation pattern (VM) with a width equal to the width of each of the first grids (FL).

[0230] In one embodiment, the step of forming a visual simulation pattern (VM) may include the step of forming the visual simulation pattern (VM) at intervals equal to the intervals between the first grids (FL).

[0231] In one embodiment, the step of forming a visual simulation pattern (VM) may include the step of performing surface treatment on an optical property matching material.

[0232] In one embodiment, the step of forming a visual simulation pattern (VM) may include the step of performing surface treatment on a base substrate (20).

[0233] In one embodiment, the step of forming a visual simulation pattern (VM) may include: a step of performing surface treatment on an optical film (30); and a step of placing the surface-treated optical film (30) on a plurality of tiled transparent display modules (10).

[0234] In one embodiment, the step of forming a visual simulation pattern (VM) may include the step of forming a visual simulation pattern (VM) with a length longer than the width of a gap (SA).

[0235] Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium that stores instructions executable by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate a program module to perform the operation of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

[0236] Computer-readable recording media include all types of recording media that store instructions that can be decoded by a computer. Examples include ROM (read-only memory), RAM (random access memory), magnetic tape, magnetic disk, flash memory, optical data storage devices, etc.

[0237] Additionally, computer-readable recording media may be provided in the form of non-transitory storage media. Here, 'non-transitory storage media' simply means that it is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily. For example, 'non-transitory storage media' may include a buffer in which data is stored temporarily.

[0238] According to one embodiment, the method according to the various embodiments disclosed herein may be provided as included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable recording medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., downloadable app) may be temporarily stored or temporarily created on a device-readable recording medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0239] As described above, the disclosed embodiments have been explained with reference to the attached drawings. Those skilled in the art will understand that the present invention may be practiced in forms different from the disclosed embodiments without changing the technical spirit or essential features of the invention. The disclosed embodiments are illustrative and should not be interpreted restrictively.

Claims

1. A transparent display device comprising a base substrate and a plurality of transparent display modules tiled on the base substrate, Each of the above plurality of transparent display modules includes a wiring pattern area and a transparent area excluding the wiring pattern area, and Among the plurality of transparent display modules mentioned above, the seam between adjacent transparent display modules is filled with an optical property matching material, and A transparent display device in which a visual simulation pattern is formed in at least a portion of the gap corresponding to the wiring pattern area.

2. In Paragraph 1, The above optical property matching material is a transparent display device having a color difference (△E*ab) of 0.8 or less with the above transparent display module.

3. In Paragraph 1, The above optical property matching material is a transparent display device having a refractive index difference (△RI) of 0.01 or less with respect to the above transparent display module.

4. In Paragraph 1, The above visual simulation pattern is a transparent display device in which the color difference (△E*ab) with the above wiring pattern area is 0.8 or less.

5. In Paragraph 1, The above wiring pattern area is arranged in a two-dimensional grid shape, and The above two-dimensional grid shape is composed of first grids extending in a first direction and second grids extending in a second direction intersecting the first direction, and A transparent display device in which the width of the above visual simulation pattern is equal to the width of each of the first grids.

6. In Paragraph 1, The above wiring pattern area is arranged in a two-dimensional grid shape, and The above two-dimensional grid shape is composed of first grids extending in a first direction and second grids extending in a second direction intersecting the first direction, and The above visual simulation pattern is a transparent display device formed at the same interval as the interval between the first grids.

7. In Paragraph 1, The above visual simulation pattern is a transparent display device formed through surface treatment of the optical property matching material.

8. In Paragraph 1, The above visual simulation pattern is a transparent display device formed through surface treatment of the base substrate.

9. In Paragraph 1, It further includes an optical film provided on the above-mentioned tiled plurality of transparent display modules; The above visual simulation pattern is a transparent display device formed through surface treatment of the optical film.

10. In Paragraph 1, A transparent display device in which the length of the above visual simulation pattern is longer than the width of the above gap.

11. A method for manufacturing a transparent display device, A step of tiling a plurality of transparent display modules on a base substrate; A step of filling the seam between adjacent transparent display modules among the plurality of transparent display modules with an optical property matching material; and A method for manufacturing a transparent display device comprising the step of forming a visual simulation pattern in at least a portion of the gap corresponding to the wiring pattern area of ​​the transparent display module.

12. In Paragraph 11, The above optical property matching material is a method for manufacturing a transparent display device in which the color difference (△E*ab) with the transparent display module is 0.8 or less.

13. In Paragraph 11, The above optical property matching material is a method for manufacturing a transparent display device in which the difference in refractive index (△RI) with the above transparent display module is 0.01 or less.

14. In Paragraph 11, A method for manufacturing a transparent display device in which the above visual simulation pattern has a color difference (△E*ab) of 0.8 or less with respect to the above wiring pattern area.

15. In Paragraph 11, The above wiring pattern area is arranged in a two-dimensional grid shape, and The above two-dimensional grid shape is composed of first grids extending in a first direction and second grids extending in a second direction intersecting the first direction, and The step of forming the above visual simulation pattern is, A step of forming the visual simulation pattern with a width equal to the width of each of the first grids; or A method for manufacturing a transparent display device comprising at least one of the step of forming the visual simulation pattern at intervals equal to the intervals between the first grids.

Images