Screen printing apparatus and transparent panel

Abstract

A screen printing apparatus and a transparent panel are disclosed. The screen printing apparatus includes: a substrate supporting unit; a blade member above the substrate support unit; a screen mask unit disposed between the substrate supporting unit and the squeegee member, the screen mask unit defining a printing opening for forming a printing pattern; and at least one tension adjusting member disposed on a first surface of the screen mask unit facing the substrate supporting unit and adjacent to the printing opening.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2024-0059019 filed on May 3, 2024, as well as all benefits arising therefrom, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The disclosure relates to a screen printing apparatus. BACKGROUND

[0003] With the progress of the information society, the demand for display apparatuses for displaying images is increasing in various forms. For example, display apparatuses are applied to various electronic apparatuses such as smart phones, digital cameras, laptop computers, navigation systems, and smart televisions ("TVs").

[0004] As display apparatuses, several types of display apparatuses such as liquid crystal displays ("LCDs") and organic light emitting displays are being used. Among these display apparatuses, organic light emitting displays display images using organic light emitting elements that generate light through the recombination of electrons and holes. Organic light emitting displays include a plurality of transistors that provide driving currents to the organic light emitting elements.

[0005] Various wirings and components are arranged in a non-display area of a display apparatus, and a light shielding portion can be arranged to prevent them from being visible from the outside.

[0006] In order to prevent light leakage in the non-display area of such a display apparatus, research into a printing apparatus that prints a light shielding portion on a cover glass and a method for manufacturing a cover glass is actively being conducted.

[0007] An exemplary printing method is screen printing, which is a process of filling ink into mesh openings by utilizing tension applied to a screen during movement of a squeegee and the screen mask and the substrate are simultaneously in line contact to transfer the filled ink. In other words, screen printing is a process of applying ink to a substrate by utilizing the viscoelastic change of ink during the process.

[0008] Specifically, in screen printing, ink is filled through the openings of a screen mask on a substrate using a squeegee, and then the screen mask is removed to print an ink pattern on the substrate. SUMMARY

[0009] During such printing, pattern defects such as a sawtooth pattern defect can occur in an edge area of printing due to the direction of operation of the squeegee and the mesh shape. This is because printing defects such as a sawtooth pattern defect can strongly occur in the edge area of printing along the direction of operation of the squeegee and the pressure direction. Therefore, it is desirable to minimize the influence of such printing defects.

[0010] The disclosed features provide a screen printing apparatus that can prevent defects in a printed pattern.

[0011] However, the disclosed features are not limited to those set forth herein. The above and other features of the disclosure will become more apparent by referring to the following detailed description of the disclosure given in conjunction with the accompanying drawings.

[0012] In the disclosed embodiments, a screen printing apparatus is provided, which includes a substrate support unit, a squeegee member above the substrate support unit, a screen mask unit disposed between the substrate support unit and the squeegee member, the screen mask unit defining a printing opening for forming a printed pattern, and at least one tension adjustment member disposed on a first surface of the screen mask unit facing the substrate support unit and adjacent to the printing opening.

[0013] In embodiments, the at least one tension adjustment member is provided as a plurality, and the plurality of tension adjustment members can form groups that generate multiple rows.

[0014] In embodiments, the plurality of tension adjustment members can be arranged in multiple rows, and the plurality of tension adjustment members arranged in a row among the plurality of tension adjustment members each have a size equal to each other.

[0015] In embodiments, the at least one tension adjustment member and the printing opening each can have a quadrilateral frame shape (e.g., a rectangular frame shape), and the at least one tension adjustment member can be smaller in size than the printing opening and can be disposed to be superimposed inside the printing opening.

[0016] In embodiments, a height of the at least one tension adjustment member along a thickness direction of the screen mask unit can be smaller than a height of the printing opening.

[0017] In embodiments, the screen mask unit can include a porous mesh member and a mesh cover layer covering the mesh member, and the mesh cover layer can cover the mesh member but expose a portion of the mesh member through the printing opening.

[0018] In embodiments, the screen mask unit can further include a support frame supporting an edge region of the mesh cover layer.

[0019] In embodiments, the substrate support unit can support a substrate to be disposed below the screen mask unit, the substrate can be a cover glass, and a printed pattern printed through the printing opening of the screen mask unit can be a light-shielding printed pattern disposed along an edge region of the cover glass.

[0020] In an embodiment, the screen printing apparatus can further include a printing unit including a squeegee member that transfers ink through the printing opening to the substrate, and a printing transfer unit that moves the printing unit.

[0021] In disclosed embodiments, a screen printing apparatus is provided that includes a substrate support unit, a squeegee member above the substrate support unit, a screen mask unit disposed between the substrate support unit and the squeegee member, the screen mask unit defining a printing opening for forming a printing pattern, and at least one adhesive tape attached to a first surface of the screen mask unit facing the substrate support unit and adjacent to the printing opening.

[0022] In an embodiment, the at least one adhesive tape can have a hollow quadrilateral frame shape (e.g., a hollow rectangular frame shape).

[0023] In an embodiment, the at least one adhesive tape can be disposed adjacent to the printing opening and can be attached along at least one region of the printing opening.

[0024] In an embodiment, the at least one adhesive tape is provided as a plurality of adhesive tapes, the plurality of adhesive tapes can be provided as a plurality of rows having a space therebetween, and a plurality of adhesive tapes arranged in a row among the plurality of adhesive tapes can each have a size equal to each other.

[0025] In an embodiment, the screen mask unit can include a porous mesh member and a mesh cover layer covering the mesh member, and the mesh cover layer can cover the mesh member but expose a portion of the mesh member through the printing opening.

[0026] In disclosed embodiments, a transparent panel for a display apparatus is provided that includes a substrate including first and second edges extending in a first direction and facing each other and third and fourth edges extending in a second direction intersecting the first direction and facing each other, and a light-shielding printed pattern disposed on a periphery of the substrate, wherein the light-shielding printed pattern includes a first pattern portion adjacent to the first edge of the substrate and a second pattern portion adjacent to the second edge of the substrate, the first and second pattern portions each extend in the first direction and each include first and second pattern edges facing each other, and the first pattern edge of the first pattern portion and the second pattern edge of the first pattern portion have different heights from each other.

[0027] In an embodiment, the first pattern edge of the second pattern portion and the second pattern edge of the second pattern portion can have different heights from each other.

[0028] In an embodiment, the second pattern edge of the first pattern portion and the first pattern edge of the second pattern portion can be disposed on the inner side of each pattern portion and face each other. The height of the second pattern edge of the first pattern portion can be greater than the height of the first pattern edge of the first pattern portion, and the height of the second pattern edge of the second pattern portion can be greater than the height of the first pattern edge of the second pattern portion.

[0029] In an embodiment, the light-shielding printed pattern may further include a third pattern portion adjacent to the third edge of the substrate and a fourth pattern portion adjacent to the fourth edge of the substrate.

[0030] In an embodiment, the third pattern portion and the fourth pattern portion may both extend in the second direction and both include third pattern edges and fourth pattern edges facing each other, and the third pattern edges of the third pattern portion and the fourth pattern portion may both have the same height as each of the fourth pattern edges of the third pattern portion and the fourth pattern edge of the fourth pattern portion.

[0031] In an embodiment, the first pattern portion, the third pattern portion, the second pattern portion, and the fourth pattern portion may be connected to each other to define a closed loop.

[0032] According to the foregoing and other embodiments disclosed, defects in printed patterns can be suppressed, specifically, defects such as serrated patterns can be prevented from appearing on the printed surface.

[0033] It should be noted that the effects of disclosure are not limited to those described above, and other effects of disclosure will be apparent from the following description. Attached Figure Description

[0034] The above and other advantages and features of the disclosure will become more apparent from the detailed description of the disclosed embodiments with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram based on an embodiment of a disclosed screen printing apparatus; Figure 2 This is a cross-sectional view of the display device; Figure 3 yes Figure 2 A perspective view of the cover glass; Figure 4 It is shown Figure 1 A plan view showing the arrangement of the screen mask unit, tension adjustment components, and cover glass; Figure 5A yes Figure 1 Top view of the screen mask unit. Figure 5B yes Figure 5A A magnified view of part AA; Figure 6A yes Figure 1 A bottom rear view of the screen mask unit.Figure 6B is an enlarged view of part BB of Figure 6A Figure 7 is a cross-sectional view of the screen mask unit of Figure 1 Figures 8 to 12 is a diagram showing the process of printing ink on the cover glass by the screen mask unit, Figure 13A is an enlarged view of the printed pattern of Figure 12 Figure 13B is an enlarged view of part CC of Figure 13A is an enlarged view of the printed pattern printed by the screen mask unit without the tension adjustment member, Figure 14A Figure 14B is an enlarged view of part DD of Figure 14A Figure 15 is a cross-sectional view of the light-shielding printed pattern and the substrate taken along the line X-X of Figure 3 Figure 16 is a cross-sectional view of the light-shielding printed pattern and the substrate taken along the line X1-X1 of Figure 3 Figures 17A to 24 is a diagram showing other embodiments of the screen mask unit, Figure 17B is an enlarged view of part EE of Figure 17A Figure 18B is an enlarged view of part FF of Figure 18A DETAILED DESCRIPTION

[0035] Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the application are shown. The disclosed embodiments may, however, be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout the specification. In the drawings, the thickness of layers and regions are exaggerated for clarity.

[0036] ​​​​​​​​​It will be understood that, although the terms“first,”“second,”“third,” etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus,“a first element,”“a first component,”“a first region,”“a first layer,” or“a first section” discussed below could be termed a second element, a second component, a second region, a second layer or a second section without departing from the teachings herein.

[0037] It will be further understood that when a layer is referred to as being“on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present. In contrast, when an element is referred to as being“directly on” another element, there are no intervening elements present.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms“a,”“an” and“the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term“or” means“and / or.” The term“at least one of’ means“one, two, three, four, or more.” As used herein, the term“and / or” includes any and all combinations of one or more of the associated listed items. It will be understood that the terms“comprises” and / or“comprising,” or“includes” and / or“including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and / or groups thereof.

[0039] “About” or“approximately” as used herein includes the recited value and means within a reasonable range of the specified value as determined by one of ordinary skill in the art, taking into account the measurement and error associated with the measurement of the particular quantity.

[0040] As used herein, terms such as“driving unit” are intended to refer to hardware components that perform a predetermined function. For example, a hardware component can include a circuit such as a field-programmable gate array (“FPGA”) or an application-specific integrated circuit (“ASIC”).

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0042] Embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, embodiments described herein are not to be construed as limited to the precise shapes illustrated herein but are to include deviations in shapes that result from, for example, manufacturing. For example, a region illustrated or described as flat can often have rough and / or nonlinear features. Moreover, sharp angles that are illustrated can be rounded. Thus, the regions illustrated in the figures are schematic and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

[0043] Embodiments of the disclosure will be described with reference to the accompanying drawings.

[0044] Figure 1 is a schematic illustration of an embodiment of a screen printing apparatus according to the disclosure.

[0045] Referring to Figure 1 , the screen printing apparatus 1 is an apparatus that applies ink I (see Figure 9 ) to a surface of a print object to form a print pattern 122 (see Figure 2 , hereinafter also referred to as a light-blocking print pattern). In embodiments, the screen printing apparatus 1 can be used, for example, in the manufacture of chip components such as capacitors, inductors, thermistors, touch panels, liquid crystal display (“LCD”) substrates, low temperature co-fired ceramic (“LTCC”) substrates, solar cell electrodes, and other electronic components, although the disclosure is not limited thereto.

[0046] The screen printing apparatus 1 prints the print pattern 122 using a screen printing method that involves transferring the ink I applied to a screen using a squeegee member 24. Specifically, forming the print pattern 122 by screen printing involves positioning a screen mask unit 200 having print openings 212 (see Figure 4 ) formed thereon above the substrate 100, applying the ink I to the screen mask unit 200 using a squeegee 23, and then removing the screen mask unit 200. After the print pattern 122 is formed, the applied ink I can be cured, although the printing method is not limited to this order.

[0047] The screen printing apparatus 1 can be used, for example, in the manufacture of display devices. The screen printing apparatus 1 will be described below as being used in the manufacture of display devices, but the disclosure is not limited thereto. The screen printing apparatus 1 may include a substrate support unit 10 supporting a substrate 100, which is the object to be printed; a screen mask unit 200 disposed on the substrate support unit 10; a printing unit 22 for printing ink I onto the substrate 100; and a printing transport unit 20 for moving the printing unit 22. The printing unit 22 may include a squeegee 23 for applying ink I and a squeegee member 24 for transferring ink I. The squeegee 23 may contact the horizontal surface of the substrate 100 or the screen mask unit 200 at an oblique angle, but the description is not limited thereto.

[0048] Figure 2 This is a cross-sectional view of the display device. Figure 3 yes Figure 2 A perspective view of the cover glass.

[0049] Reference Figure 2 The display device may include a display panel, and the display panel may include one or more light sources that provide light. In embodiments, for example, the display panel may be a light-receiving panel including an external light source, or a self-emissive panel including internal light-emitting elements. A self-emissive panel includes a plurality of light-emitting elements. In embodiments, the light-emitting elements include organic light-emitting diodes (“OLEDs”), quantum dot light-emitting diodes (“QLEDs”), inorganic-based micro-light-emitting diodes (“microLEDs”), and inorganic-based nanoLEDs.

[0050] The display panel may include a display area DA for displaying images and a non-display area NDA for not displaying images. The non-display area NDA may be positioned around the display area DA, and the non-display area NDA may at least partially surround the display area DA or surround the entire display area DA.

[0051] Reference Figure 2 In an embodiment, the display device may include a display substrate 111, a display element layer 112 formed on the display substrate 111, a thin film encapsulation layer 113 protecting the display element layer 112, a pressure-sensitive adhesive (“PSA”) layer 114, a cover glass 120 formed on the top of the display element layer 112, and a light-shielding printed pattern 122 formed along the edge of the bottom surface 121b of the cover glass 120 to block incident light.

[0052] The display substrate 111 may be an LCD panel comprising liquid crystal or composed of liquid crystal, or an organic light-emitting panel comprising organic light-emitting elements or composed of organic light-emitting elements. Alternatively, the display substrate 111, as a transparent substrate, may be a flexible substrate such as a polymer film.

[0053] The display element layer 112 is formed on the display substrate 111 and includes an element area in which an active element such as a thin film transistor ("TFT") is formed and an emission area in which a light emitting layer is formed. The element area and the emission area can be separated from each other or can be stacked.

[0054] The thin film encapsulation layer 113 can cover and protect the display substrate 111 and the display element layer 112. The thin film encapsulation layer 113 can be formed on the display element layer 112 and can face the display substrate 111. The thin film encapsulation layer 113 can prevent oxygen and moisture from entering from the outside, thereby protecting the display element layer 112.

[0055] Referring to Figure 2 and Figure 3 , the cover glass 120 can be formed on the thin film encapsulation layer 113. Specifically, the cover glass 120 can be attached to the thin film encapsulation layer 113 by the PSA layer 114 formed of a PSA.

[0056] The cover glass 120 can include a bottom surface 121b facing the thin film encapsulation layer 113 and a top surface 121a opposite the bottom surface 121b. The light-shielding printed pattern 122 can be disposed on the bottom surface 121b, but the disclosure is not limited thereto. In an alternative embodiment, the light-shielding printed pattern 122 can be disposed on the top surface 121a.

[0057] The cover glass 120 can be disposed on one surface of the display panel in the Z-axis direction, such as the top surface of the display panel, and can cover and protect the display panel. In an embodiment, for example, the cover glass 120 can have the same shape as that of the display panel, but can be larger in size to completely cover one surface of the display panel. In other words, the side surface of the cover glass 120 can extend beyond the corresponding side surface of the display panel, but the disclosure is not limited thereto.

[0058] When viewed from above, the cover glass 120 can be quadrangular, for example, a rectangular shape. In an embodiment, for example, as shown in Figure 3 , the cover glass 120 can have a quadrangular shape (for example, a rectangular planar shape) having a shorter side in the X-axis direction and a longer side in the Y-axis direction. The corners where the shorter side in the X-axis direction and the longer side in the Y-axis direction meet can be formed as right angles or rounded with a curvature. However, the planar shape of the cover glass 120 is not particularly limited, and the cover glass 120 can be formed in other polygonal shapes, a circular shape, or an elliptical shape.

[0059] The cover glass 120 is shown as being flat, but the disclosure is not limited thereto. In an alternative embodiment, at least one side of the cover glass 120 can be curved with a predetermined curvature.

[0060] The cover glass 120 (or transparent panel) may include a substrate 121 and a light-shielding printed pattern 122 disposed on at least a portion of the substrate 121.

[0061] The substrate 121 may include or be composed of a transparent material that transmits light, but the disclosure is not limited thereto. In embodiments, the substrate 121 may include, for example, glass, sapphire, quartz, or a transparent plastic film. When the substrate 121 includes a plastic material, the cover glass 120 may have flexible properties.

[0062] When the substrate 121 is a plastic film, embodiments of the plastic material include, but are not limited to, polyimide, polyacrylate, polycarbonate, polyvinylidene chloride, polyvinylidene fluoride, polyethylene naphthalate, polystyrene, ethylene vinyl alcohol copolymer, polyethersulfone, cellulose acetate propionate, polyetherimide, polyphenylene sulfide, polyarylate, cellulose triacetate, polymethyl methacrylate, or polyethylene terephthalate (“PET”).

[0063] The substrate 121 may have a quadrilateral parallelepiped shape, such as a rectangular parallelepiped shape (cubic prism shape), but the disclosure is not limited thereto. That is, the substrate 121 may have various other shapes depending on the shape of the display panel.

[0064] The substrate 121 may have a shape substantially the same as that of the display panel, but the disclosure is not limited thereto. The shape of the substrate 121 is not particularly limited, as long as it can completely cover the display panel. In embodiments, for example, the substrate 121 may have a quadrilateral planar shape (e.g., a rectangular planar shape) specifically having vertical corners or rounded corners.

[0065] The light-shielding printed pattern 122 can be set on the bottom surface 121b (i.e. the surface facing the display panel) of the cover glass 120, which is the inner surface of the substrate 121.

[0066] A light-shielding printed pattern 122 is formed on the edge portion of the bottom surface 121b of the cover glass 120, that is, formed in the border area that serves as the non-display area NDA. Therefore, the light-shielding printed pattern 122 can be provided in the non-display area NDA of the cover glass 120 to prevent light leakage in the display device and to add color to the border area of ​​the display device.

[0067] The light-blocking printed pattern 122 can be an ink printing layer printed with colored ink I. When the light-blocking printed pattern 122 is formed with colored ink I, the light-blocking printed pattern 122 can block incident light from the outside. The light-blocking printed pattern 122 can be a layer formed by including pigments or dyes.

[0068] The ink I forming the opaque printed pattern 122 can be ink I for a black matrix and can be provided in liquid form, but the disclosure is not limited thereto. Ink I can include, for example, a solvent and an organic material contained in the solvent. The organic material can be dispersed in the solvent. The organic material can be a solid substance remaining on the substrate 100 after the solvent is removed. The solvent can be a substance that vaporizes or evaporates at room temperature or upon heating. The solvent can include acetone, water, ethanol, toluene, etc. Ink I can be dissolved in a solvent or can be a suspension of solid components, wherein the solid components can vary from organic to metallic substances. Ink I can be black ink I representing black, but the disclosure is not limited thereto. That is, various inks I can be used.

[0069] Reference Figure 1 and Figure 3 The screen printing apparatus 1 can be used for printing in... Figure 2 A device for printing a light-blocking pattern 122 on a cover glass 120.

[0070] In the screen printing apparatus 1, the substrate 100, which is the object to be printed, can be a cover glass 120. In this case, the screen printing apparatus 1 can be an apparatus for printing ink I on the periphery of the cover glass 120 (specifically, to form a light-blocking printed pattern 122 on the periphery of the cover glass 120). The cover glass 120 will be described below as the substrate 100, but the disclosure is not limited thereto. That is, the screen printing apparatus 1 can be used for various printing objects.

[0071] The substrate support unit 10 may be disposed below the substrate 100 to support the substrate 100. The substrate support unit 10 may be fixed at a predetermined distance from the printing unit 22, and may also include a lifting device for adjustable height, such that when the substrate 100 is mounted on the substrate support unit 10, it may be raised toward the printing unit 22, and lowered when printing is completed, but the disclosure is not limited thereto.

[0072] The printing conveying unit 20 may include a slider 21 and a printing drive unit 11. The printing unit 22 is coupled to the slider 21, and the printing drive unit 11 causes the printing unit 22 to move along the slider 21.

[0073] The printing unit 22 can be slidably coupled to the slider 21, and the slider 21 can guide the printing unit 22 in the direction along which ink I is printed on the substrate 100 (e.g., in the direction of ink I being printed on the substrate 100). Figure 1 The printing unit 22 can be slidably coupled to the slider 21 to move along the slider 21, or it can be fixed to the slider 21 to allow the slider 21 to move left and right, but the disclosure is not limited thereto. That is, various guiding devices that allow the printing unit 22 to move for printing can be used.

[0074] The printing drive unit 11 can provide a driving force for the printing unit 22 to move the printing unit 22 along the slider 21. In an embodiment, for example, a drive motor can be provided, and the printing unit 22 can be moved in the arrow direction by the driving force from the drive motor. However, the disclosure is not limited thereto.

[0075] The squeegee 23 and the squeegee member 24 can both be attached to the printing unit 22 at one end, wherein the opposite ends are free ends that contact the ink I on the substrate 100 or the screen mask unit 200. The squeegee 23 and the squeegee member 24 can be rotatably attached to the lower part of the printing unit 22 at a predetermined angle, but their attachment position and method are not particularly limited, as long as they can apply and print ink I on the substrate 100.

[0076] The squeegee 23 can spread and apply ink I extensively onto the screen mask unit 200 disposed on the substrate 100. The squeegee member 24 transfers the ink I applied by the squeegee 23 from the screen mask unit 200 to the substrate 100 to print ink I.

[0077] Figure 4 It is shown Figure 1 A plan view showing the arrangement of the screen mask unit, tension adjustment components, and cover glass. Figure 5A yes Figure 1 Top view of the screen mask unit. Figure 5B yes Figure 5A A magnified view of part AA. Figure 6A yes Figure 1 A rear-view, bottom-view view of the screen mask unit. Figure 6B yes Figure 6A A magnified image of part of BB. Figure 7 yes Figure 1 A cross-sectional view of the screen mask unit. Figures 8 to 12 This diagram illustrates the process of printing ink onto a cover glass using a screen mask unit.

[0078] Reference Figure 4 , Figure 5A and Figure 5B The screen mask unit 200 may include a support frame 210, printing masks 211 and 213 coupled to the support frame 210 and having printing openings 212, and tension adjustment members 220 disposed below the printing masks 211 and 213.

[0079] Printing opening 212 is located at the center of printing masks 211 and 213, allowing the ink I to pass through in the Z-axis direction. Ink I applied to the screen mask unit 200 passes through printing opening 212, which serves as a pathway for ink I, to be printed onto the substrate 100. Through printing opening 212, a portion of the mesh member 213, which will be described later, is exposed, allowing ink I to pass through printing opening 212, eventually through mesh member 213, and then be printed onto the substrate 100.

[0080] The printing opening 212 corresponds to the area through which ink I passes to be printed on the substrate 100, and therefore can have the same shape as the light-shielding printed pattern 122 on the substrate 100. In an embodiment, for example, as Figure 3 As shown, when a light-shielding printed pattern 122 is formed in the edge region of the cover glass 120, the printing opening 212 can be configured to overlap with the area where the black light-shielding printed pattern 122 is formed in the edge region of the cover glass 120, and can be formed with the same shape as the black light-shielding printed pattern 122. In an embodiment, for example, the printing opening 212 can have a quadrilateral frame shape, such as a rectangular frame shape identical to the light-shielding printed pattern 122, but the disclosure is not limited thereto. That is, the printing opening 212 can have various other polygonal shapes, circular shapes, or elliptical shapes depending on the shape of the light-shielding printed pattern 122.

[0081] The support frame 210 can support the peripheral areas of the printing masks 211 and 213. Specifically, the support frame 210 can be combined with the grid members 213 of the printing masks 211 and 213, which will be described later, and can fix the peripheral areas of the grid members 213.

[0082] The support frame 210 may include or be composed of metal or heat-resistant resin, but the disclosure is not limited thereto. That is, the support frame 210 may include or be composed of various materials that provide strength for supporting the printing masks 211 and 213.

[0083] The support frame 210 can have an empty quadrilateral frame shape, such as an empty rectangular frame shape, but the disclosure is not limited thereto. That is, the support frame 210 can have various other polygonal shapes, circular shapes, or elliptical shapes.

[0084] The support frame 210 may include an upper surface 210a facing the printing unit 22 and a lower surface 210b facing the cover glass 120. The support frame 210 may have a central region having an empty quadrilateral frame shape, such as an empty rectangular frame shape, wherein a grid member 213 is configured to cover the central region of the support frame 210, and the peripheral regions of the grid member 213 are fixed to the support frame 210.

[0085] Specifically, the outer region of the mesh member 213 can be fixed to the support frame 210. The outer region of the mesh member 213 can be attached to the support frame 210 using adhesives or various fastening devices, but the disclosure is not limited thereto. In embodiments, for example, the mesh member 213 can be bonded to the support frame 210 using synthetic rubber or acrylic adhesives, but the type of adhesive is not limited and can vary.

[0086] Reference Figures 6A to 7 Printing masks 211 and 213 may include a porous mesh member 213 and a mesh cover layer 211, the mesh cover layer 211 being applied to the mesh member 213 to cover the mesh member 213.

[0087] The grid member 213 may include multiple holes, and when pressed by the scraper member 24, ink I can be transferred to the substrate 100 through the printing opening 212 by approaching or moving away from the substrate 100.

[0088] Specifically, the entire grid member 213 can be covered by the grid cover layer 211. The holes in the grid member 213 can be closed by the grid cover layer 211, and some areas of the grid member 213 can be exposed through the printing openings 212. The areas closed by the grid cover layer 211 correspond to non-printing areas where ink I does not pass through, and the areas exposed through the printing openings 212 correspond to printing areas where ink I is printed.

[0089] The mesh member 213 can be a woven fabric with warp and weft threads forming a mesh, but the disclosure is not limited thereto. That is, the mesh member 213 can be in various forms, as long as it has holes through which ink I passes. In addition, the mesh member 213 can include or be composed of materials such as polyester or stainless steel (“SUS”), but the disclosure is not limited thereto. That is, the mesh member 213 can include or be composed of various other materials, as long as it has the elasticity to be pressed by the scraper member 24.

[0090] Therefore, the grid member 213 allows ink I to pass through the holes exposed by the printing opening 212 in the grid member 213. Thus, as ink I passes through the holes exposed in the printing opening 212, a light-shielding printed pattern 122 can be formed on the substrate 100.

[0091] A printing opening 212 that exposes a portion of the grid member 213 can be set in the central region of the grid cover layer 211 in the same shape as the light-shielding printing pattern 122.

[0092] When a printing opening 212, which exposes a portion of the mesh member 213, is disposed in the mesh cover layer 211, the printing opening 212 can be formed by exposing and removing a portion of the mesh cover layer 211 during its formation. Specifically, a coating solution for forming the mesh cover layer 211 can be applied to cover the entire mesh member 213, and after the application of the coating solution is completed, a portion of the mesh cover layer 211 can be removed by exposure to form the printing opening 212, thereby allowing ink I to penetrate the printing opening 212. When removing a portion of the mesh cover layer 211, it can be done as follows: Figure 7 As shown, a printing opening 212 is formed in the grid cover layer 211 to expose a portion of the grid member 213, and ink I can be transferred onto the cover glass 120 through the printing opening 212, thereby forming a... Figure 3 The light-blocking printed pattern 122 shown is shown.

[0093] The mesh cover layer 211 can be a coating applied to cover the entire mesh member 213 except for the printed opening 212. In this case, the mesh cover layer 211 fills all the holes of the mesh member 213 except for the portion exposed by the printed opening 212.

[0094] The mesh cover layer 211 may include or be composed of a photosensitive resin. In embodiments, the photosensitive resin may include, for example, polyvinyl alcohol (“PVA”), polyvinyl acetate (“PVAc”), silicone resin, acrylic resin, or epoxy resin, but is not limited thereto.

[0095] When the grid cover layer 211 includes or is composed of photosensitive resin, the printing openings 212 can be formed by exposure using a photomask for forming the printing openings 212. Here, the printing openings 212 without photosensitive resin allow ink I to be transferred to the substrate 100 through the holes in the grid member 213, while the ink I disposed on the grid cover layer 211 does not pass through the grid member 213 and forms a non-printing area.

[0096] Ink I can be placed on the upper surface 211a of the grid cover layer 211, and printing can be performed by moving the squeegee member 24 above the grid cover layer 211. By pressing the ink I with the squeegee member 24, the ink I passes through the exposed portion of the grid member 213 via the printing opening 212, and the light-blocking printing pattern 122 can be printed on the substrate 100 according to the shape of the printing opening 212. The grid member 213 can be moved toward the substrate 100 by the force applied by the squeegee member 24.

[0097] Reference Figures 6A to 7 The tension adjustment member 220 can be disposed on the lower surface 211b of the grid cover layer 211 near the printing opening 212.

[0098] The tension adjustment member 220 can precisely control the tension of the grid member 213 by adjusting the pressure applied by the scraper member 24 to the grid member 213 of the printing masks 211 and 213 during printing.

[0099] Tension adjustment member 220 can provide tension to the mesh members 213 of printing masks 211 and 213 and can create a step difference. Tension adjustment member 220 can have various forms. In embodiments, for example, tension adjustment member 220 can be formed as an adhesive tape or resin layer on the lower surface 211b of mesh cover layer 211 near printing opening 212, or a step difference can be created by making the mesh cover layer 211 of printing masks 211 and 213 thicker. In another embodiment, a quadrilateral (e.g., rectangular plate shape) SUS mesh can be attached to the mounting location of tension adjustment member 220, in which case a polyester mesh can be additionally attached to the entire SUS mesh except for printing opening 212.

[0100] When the tension adjusting member 220 is formed as a resin layer on the lower surface 211b of the mesh cover layer 211, the tension adjusting member 220 may include or be composed of materials such as polyethylene (“PE”), polyvinyl chloride (“PVC”), polystyrene (“PS”), polyester film (“PET”), or polypropylene (“PP”), but the disclosure is not limited thereto.

[0101] When the tension adjusting member 220 is provided in the form of an adhesive tape, the tension adjusting member 220 may have a single strip shape corresponding to the printing opening 212, but the disclosure is not limited thereto. (See later...) Figure 17A and Figure 17B As described, the tension adjusting member 220 may be provided in the form of multiple segmented strips, but the disclosure is not limited thereto. The material of the tension adjusting member 220 may be any type of adhesive tape that can provide durability and adhesion.

[0102] The tension adjustment member 220 may have the same shape as the printing opening 212, but the disclosure is not limited thereto. In embodiments, the tension adjustment member 220 may have an empty quadrilateral frame shape, such as an empty rectangular frame shape, an empty polygonal frame shape, an empty circular frame shape, or an empty elliptical frame shape.

[0103] The width of the tension adjusting member 220 may be the same as or greater than the width of the printing opening 212, but the disclosure is not limited thereto. The size of the tension adjusting member 220 may be smaller than the size of the printing opening 212, so that the tension adjusting member 220 can be disposed within the printing opening 212. The shape of the tension adjusting member 220 is not limited, as long as the tension adjusting member 220 can be disposed within the printing end area, which will be described later. The height of the tension adjusting member 220 may be smaller than the height of the printing opening 212, but the disclosure is not limited thereto.

[0104] Since the tension adjusting member 220 is disposed on the lower surface 211b of the grid cover layer 211, forming a tension adjusting step difference structure, fine-tuning accuracy can be achieved through the step difference generated by the tension adjusting member 220. Specifically, during printing, when the squeegee member 24 is near the printing opening 212... Figure 8 When the tension adjusting member 220 moves in the direction of the arrow, it can provide tension to the printing masks 211 and 213 at the printing end area of ​​the printing opening 212, allowing the scraper member 24 to move upward as it withdraws from the entry area of ​​the printing opening 212 to the printing end area of ​​the printing opening 212.

[0105] In addition, since the tension adjustment member 220 is located on the rear side of the screen mask unit 200, defect shapes such as serrated patterns in the light-shielding printing pattern 122 can be suppressed by preventing ink I from seeping out through the natural gaps in the grid cover layer 211.

[0106] Therefore, the screen printing apparatus 1 can specifically increase tension in the area adjacent to the printing opening 212 that forms the light-shielding printing pattern 122, minimize the influence of the grid shape through the step difference, and provide precise tension adjustment through the step difference formation of the tension adjusting member 220.

[0107] The following will refer to Figures 8 to 12 Describe the process of printing the light-blocking printed pattern 122. Figures 9 to 12 Corresponding to Figure 4 and Figure 7 Region A.

[0108] Reference Figure 8 , Figure 8 The diagram shows the state in which the squeegee member 24 is positioned in the area of ​​the printing opening 212 of the screen mask unit 200. When the squeegee 23 applies ink I to the screen mask unit 200, the squeegee member 24 moves in the direction of the arrow, pushing the ink I into the printing opening 212 of the screen mask unit 200. Then, as... Figure 13A and Figure 13BAs shown, ink I can be transferred to a substrate 100 disposed below the screen mask unit 200 to form a light-shielding printed pattern 122 having the same width as the printing opening 212.

[0109] Specifically, such as Figure 9 As shown, the squeegee member 24 is disposed on one side of the cover glass 120, which is the object of printing, wherein a portion of the grid member 213 is exposed through the printing opening 212. When ink I is located on the grid member 213, the squeegee member 24 moves along the printing direction. (Refer to...) Figure 10 and Figure 11 When the scraper member 24 moves, it can press the mesh member 213, causing the mesh member 213 to contact the substrate 100. At this time, as... Figure 11 As shown, ink I on the grid member 213 can be transferred to the substrate 100 through the printing opening 212 to form a light-shielding printed pattern 122. When the squeegee member 24 starts from the initial position of the printing opening 212 and pushes the ink I onto the substrate 100, the squeegee member 24 eventually leaves the printing opening 212. When the squeegee member 24 reaches the printing end area of ​​the printing opening 212 to which the tension adjusting member 220 is attached, the tension of the printing masks 211 and 213 increases. The squeegee member 24 moves upward due to the increased tension as it leaves the printing opening 212, thus allowing it to exit the printing opening 212. As the squeegee member 24 moves upward, as... Figure 13A and Figure 13B As shown, the height H1 of the light-shielding printed pattern 122 at the printing end area can be greater than the height H of the light-shielding printed pattern 122 at the printing start area. In addition, since ink I is prevented from entering the gap between the substrate 100 and the screen mask unit 200, defects in the final light-shielding printed pattern 122 can be prevented.

[0110] Figure 13A yes Figure 12 An enlarged image of the light-blocking printed pattern. Figure 13B yes Figure 13A A magnified view of part of CC. Figure 14A This is an enlarged view of a light-blocking printed pattern printed by a screen mask unit without tension adjustment components. Figure 14B yes Figure 14A A magnified view of part of DD.

[0111] Reference Figures 13A to 14B When tension adjustment component 220 is installed, such as Figure 13A and Figure 13B As shown, one side of the light-blocking printed pattern 122 can exhibit a uniform shape. When the squeegee member 24 moves upward and away from the printing opening 212, as... Figure 13A and Figure 13BAs shown, the height H1 on the right can be greater than the height H on the left. However, when the tension adjustment member 220 is not present, as... Figure 14A and Figure 14B As shown, jagged pattern defects may occur in the light-shielding printed pattern 122a, and the heights H2a and H22a of the light-shielding printed pattern 122a on the left and right sides, respectively, may be equal.

[0112] Figure 15 It is along Figure 3 A cross-sectional view of the light-blocking printed pattern and the substrate, taken from line XX. Figure 16 It is along Figure 3 A cross-sectional view of the opaque printed pattern and the substrate, taken from line X1-X1.

[0113] Reference Figure 15 The light-blocking printed pattern 122 manufactured by the screen mask unit 200 at the position where the tension adjustment member 220 is attached may include, for example, a pair of light-blocking printed pattern portions disposed on the short side of the cover glass 120, namely, a first pattern portion 122_1 and a second pattern portion 122_2.

[0114] The first pattern portion 122_1 and the second pattern portion 122_2 can be spaced apart from each other in a first direction (i.e., the Y-axis direction) and can be disposed at the short side of the cover glass 120.

[0115] The first pattern portion 122_1 and the second pattern portion 122_2 may respectively include first pattern edges 122_1a and 122_2a extending in the Y-axis direction and second pattern edges 122_1b and 122_2b extending in the Y-axis direction and facing the first pattern edges 122_1a and 122_2a.

[0116] The second pattern edges 122_1b and 122_2b can be portions of the light-shielding printed pattern 122 formed at the location where the tension adjustment member 220 is attached, and the heights H11 and H22 of the second pattern edges 122_1b and 122_2b can be greater than the heights H1 and H2 of the first pattern edges 122_1a and 122_2a, which are formed at locations where the tension adjustment member 220 is not attached.

[0117] Reference Figure 16 The light-blocking printed pattern 122 manufactured by the screen mask unit 200 at a position where the tension adjustment member 220 is not attached includes, for example, a pair of light-blocking printed pattern portions provided on the long side of the cover glass 120, namely, the third pattern portion 122_3 and the fourth pattern portion 122_4.

[0118] The third pattern portion 122_3 and the fourth pattern portion 122_4 can be spaced apart from each other in the second direction (i.e., the X-axis direction) and can be provided on the long side of the cover glass 120.

[0119] The third pattern portion 122_3 and the fourth pattern portion 122_4 extend in the second direction (i.e., the X-axis direction) and respectively include third pattern edges 122_3a and 122_4a and fourth pattern edges 122_3b and 122_4b facing the third pattern edges 122_3a and 122_4a respectively.

[0120] The third pattern edges 122_3a and 122_4a and the fourth pattern edges 122_3b and 122_4b can all be portions of the light-shielding printed pattern 122 formed at positions where the tension adjusting member 220 is not attached, and the heights H33 and H44 of the fourth pattern edges 122_3b and 122_4b can be the same as the heights H3 and H4 of the third pattern edges 122_3a and 122_4a. The first pattern portion 122_1, the third pattern portion 122_3, the second pattern portion 122_2, and the fourth pattern portion 122_4 are connected to each other and define a closed loop.

[0121] The following will refer to Figures 17A to 24 Other disclosed embodiments are described.

[0122] Figure 17A and Figure 18A A tension adjustment member according to other disclosed embodiments is shown. Figure 17B yes Figure 17A A magnified view of part of the EE. Figure 18B yes Figure 18A A magnified view of part of FF.

[0123] Figure 17A and Figure 17B Implementation examples and Figure 6A and Figure 6B The difference in the embodiment is that the tension adjustment member 220a attached to the lower surface 211b of the mesh cover layer 211 is in the form of a segmented strip.

[0124] Reference Figure 17A and Figure 17B The tension adjustment member 220a can be in the form of a segmented band that generates a step difference structure for tension adjustment, and can provide fine-tuning accuracy through this step difference structure. In this way, the tension adjustment member 220a can provide a structure for forming a step difference on the lower surface 211b of the mesh cover layer 211, thereby achieving precise tuning.

[0125] When the tension adjusting member 220a is in the form of a segmented band, the tension can be adjusted according to the thickness and number of the tension adjusting member 220a. Additionally, for precise adjustment, the tension can be adjusted by removing or adding tension adjusting members 220a at the points where tension adjustment is desired. This allows for simplified operations and quantification during fine-tuning at each point without moving all tension adjusting members 220a. In embodiments where tension evaluation is required with all tension adjusting members 220a attached and then different tension settings are needed for different areas of the grid members 213 of the print masks 211 and 213, the tension can be finely adjusted, for example, by removing tension adjusting members 220a according to the desired tension value for each area of ​​the grid members 213 of the print masks 211 and 213. The tension can be finely adjusted by removing or adding multiple tension adjusting members 220a based on conditions such as the pressure of the squeegee member 24 and the thickness of the grid cover layer 211. Furthermore, the tension of each area can be adjusted by changing the thickness and shape of the multiple tension adjusting members 220a. However, the disclosure is not limited to these examples, and various other methods for fine-tuning tension may exist.

[0126] Figure 18A and Figure 18B Implementation examples and Figure 17A and Figure 17B The difference in the embodiment is that the multiple sets of tension adjustment members 220b attached to the lower surface 211b of the mesh cover layer 211 have varying heights.

[0127] Reference Figure 18A and Figure 18B Each group of tension adjusting members 220b can be arranged to gradually increase in height, forming an ascending curve from the first tension adjusting member 220b to the last tension adjusting member 220b. All tension adjusting members 220a have the same dimensions. Figure 17A and Figure 17B The implementation methods differ, in Figure 18A and Figure 18B In some embodiments, the tension adjusting member 220b has different heights, allowing for the provision of different tension intensities. More precise tension adjustment can be achieved by removing or adding the tension adjusting member 220b in various combinations.

[0128] Figures 19 to 24 Various exemplary tension adjustment components are shown.

[0129] Figure 19 Implementation examples and Figure 6A and Figure 6B The difference in the embodiment is that the tension adjusting member 220_1 is discontinuously arranged in the short side direction.

[0130] ReferenceFigure 19 ,and Figure 6A and Figure 6B Unlike the continuously connected tension adjustment members 220, the tension adjustment members 220_1 can be arranged discontinuously. Since the squeegee member 24 moves from the initial printing position where the printing of the light-shielding printed pattern 122 begins to the printing end position where the squeegee member 24 leaves the printing opening 212, the tension adjustment members 220_1 can be arranged in pairs only at the printing end position.

[0131] Reference Figure 20 The tension adjustment component 220_2 can be set discontinuously. However, with Figure 19 Unlike tension adjustment component 220_1, tension adjustment component 220_2 can be arranged around printing opening 212 at both the printing start position and printing end position along the direction of the arrow.

[0132] Specifically, in Figure 19 In some embodiments, the tension adjustment member 220_1 may be provided only at the printing end position, but in Figure 20 In one embodiment, the two pairs of tension adjustment members 220_2 can be arranged at a total of four positions in the short side direction around the printing opening 212.

[0133] Figure 21 Implementation examples and Figure 6A and Figure 6B The difference between the embodiments is that, apart from its shape and Figure 6A and Figure 6B In addition to the quadrilateral annular tension adjustment member (e.g., rectangular annular tension adjustment member) 220_3 with the same counterpart, an additional tension adjustment member 220_3 is provided.

[0134] Reference Figure 21 The quadrilateral annular tension adjustment member (e.g., the rectangular annular tension adjustment member) 220_3 can be arranged along the printing opening 212, and a pair of additional tension adjustment members 220_3 can be arranged on both sides of the printing opening 212 along the short side direction along the moving direction of the scraper member 24.

[0135] Figure 22 Implementation examples and Figure 19 The difference in the embodiment is that the tension adjustment member 220_4 is discontinuously arranged in the long side direction around the printing opening 212.

[0136] exist Figure 22 In one embodiment, the pair of tension adjusting members 220_1 are discontinuously arranged in the short-side direction. Figure 19 Unlike other embodiments, the paired tension adjustment members 220_4 can be arranged inside and outside the printing opening 212 along the direction of the arrow.

[0137] Figure 23 Implementation examples and Figure 22 The difference in the embodiment is that the tension adjustment member 220_5 is discontinuously arranged around the printing opening 212 at both the printing start position and the printing end position along the long side direction.

[0138] Specifically, in Figure 22 In this embodiment, when the scraper member 24 moves in the direction of the arrow, the tension adjusting member 220_4 can be set only at the printing end position, but in Figure 23 In one embodiment, two pairs of tension adjustment members 220_5 can be arranged at a total of four locations around the printing opening 212 along the long side direction.

[0139] Figure 24 Implementation examples and Figure 6A and Figure 6B The difference between the embodiments is that, apart from its shape and Figure 6A and Figure 6B In addition to the identical quadrilateral annular tension adjustment member (e.g., rectangular annular tension adjustment member) 220_6, a pair of additional tension adjustment members 220_6 are provided.

[0140] Reference Figure 24 A pair of additional tension adjusting members 220_6 can be further arranged along the long side direction (i.e., the direction of movement of the scraper member 24), and Figure 6A The annular tension adjustment member 220 can be arranged around the circumference of the printing opening 212 between the additional tension adjustment members 220_6.

[0141] As described above, since the tension adjustment member 220 is disposed on the lower surface 211b of the mesh cover layer 211 of the screen mask unit 200, it can provide the screen mask unit 200 with an asymmetrical step difference and tension structure. This can prevent defects such as jagged patterns from appearing in the light-shielding printed pattern 122, thereby improving printing accuracy, stability and reliability.

[0142] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the preferred embodiments without substantially departing from the principles of the invention. Therefore, the preferred embodiments of the invention disclosed are used only in a general and descriptive sense and not for limiting purposes.

Claims

1. A screen printing apparatus, the screen printing apparatus comprising: Base support unit; A scraper component is located above the base support unit. A screen mask unit is disposed between the substrate support unit and the squeegee member, the screen mask unit defining a printing opening for forming a printing pattern; as well as At least one tension adjustment member is disposed on the first surface of the screen mask unit facing the substrate support unit and adjacent to the printing opening.

2. The screen printing apparatus as described in claim 1, wherein, The at least one tension adjusting member is configured as multiple tension adjusting members, and The plurality of tension adjustment components form a group that produces multiple rows.

3. The screen printing apparatus as described in claim 2, wherein, The plurality of tension adjustment components are arranged in the plurality of rows, and The multiple tension adjustment components arranged in a row have equal dimensions.

4. The screen printing apparatus as described in claim 1, wherein, Both the at least one tension adjusting member and the printing opening have a rectangular frame shape, and The size of the at least one tension adjusting member is smaller than the size of the printing opening, and the at least one tension adjusting member is superimposed on the interior of the printing opening.

5. The screen printing apparatus as described in claim 1, wherein, The height of the at least one tension adjustment member along the thickness direction of the screen mask unit is less than the height of the printing opening.

6. The screen printing apparatus as claimed in claim 1, wherein, The screen mask unit includes porous mesh components and a mesh cover layer covering the mesh components, and The mesh overlay covers the mesh component, but exposes a portion of the mesh component through the printed opening.

7. The screen printing apparatus as claimed in claim 6, wherein, The screen mask unit also includes a support frame that supports the edge region of the mesh cover layer.

8. The screen printing apparatus as claimed in claim 1, wherein, The substrate support unit supports the substrate, such that the substrate is positioned below the screen mask unit. The substrate is a glass cover, and The printed pattern printed through the printing opening of the screen mask unit is a light-shielding printed pattern set along the edge area of ​​the cover glass.

9. The screen printing apparatus of claim 8, further comprising: A printing unit includes the squeegee member, which transfers ink onto the substrate through the printing opening; as well as The printing conveyor unit moves the printing unit.

10. A screen printing apparatus, the screen printing apparatus comprising: Base support unit; A scraper component is located above the base support unit. A screen mask unit is disposed between the substrate support unit and the squeegee member, the screen mask unit defining a printing opening for forming a printing pattern; as well as At least one adhesive tape is attached to the first surface of the screen mask unit facing the substrate support unit and adjacent to the printing opening.

11. The screen printing apparatus as claimed in claim 10, wherein, The at least one adhesive tape has a hollow rectangular frame shape.

12. The screen printing apparatus as claimed in claim 10, wherein, The at least one adhesive tape is configured to be adjacent to the printed opening and attached along at least one area of ​​the printed opening.

13. The screen printing apparatus as claimed in claim 12, wherein, The at least one adhesive tape is configured as multiple adhesive tapes. The plurality of adhesive tapes are configured as multiple rows with intervals between them, and The adhesive tapes arranged in a row among the plurality of adhesive tapes each have the same size as each other.

14. The screen printing apparatus as claimed in claim 10, wherein, The screen mask unit includes porous mesh components and a mesh cover layer covering the mesh components, and The mesh overlay covers the mesh component, but exposes a portion of the mesh component through the printed opening.

15. A transparent panel for a display device, the transparent panel comprising: The substrate includes: a first edge and a second edge extending in a first direction and facing each other; and a third edge and a fourth edge extending in a second direction intersecting the first direction and facing each other; and A light-shielding printed pattern is disposed on the periphery of the substrate, the light-shielding printed pattern comprising: a first pattern portion adjacent to a first edge of the substrate; and a second pattern portion adjacent to a second edge of the substrate. in, Both the first pattern portion and the second pattern portion extend in the first direction and each includes a first pattern edge and a second pattern edge facing each other. The first pattern edge and the second pattern edge of the first pattern portion have different heights from each other.

16. The transparent panel as claimed in claim 15, wherein, The first pattern edge of the second pattern portion and the second pattern edge of the second pattern portion have different heights from each other.

17. The transparent panel as claimed in claim 16, wherein, The second pattern edge of the first pattern portion and the first pattern edge of the second pattern portion are disposed on the inner side of each pattern portion and face each other. The height of the second pattern edge of the first pattern portion is greater than the height of the first pattern edge of the first pattern portion, and The height of the second pattern edge of the second pattern portion is greater than the height of the first pattern edge of the second pattern portion.

18. The transparent panel as claimed in claim 15, wherein, The light-shielding printed pattern also includes a third pattern portion adjacent to the third edge of the substrate and a fourth pattern portion adjacent to the fourth edge of the substrate.

19. The transparent panel as claimed in claim 18, wherein, Both the third pattern portion and the fourth pattern portion extend in the second direction and each includes a third pattern edge and a fourth pattern edge facing each other. The third pattern edge of the third pattern portion and the third pattern edge of the fourth pattern portion both have the same height as each of the fourth pattern edges of the third pattern portion and the fourth pattern edge of the fourth pattern portion.

20. The transparent panel of claim 18, wherein, The first pattern portion, the third pattern portion, the second pattern portion, and the fourth pattern portion are connected to each other and define a closed loop.

Images