Display panel

Abstract

The utility model discloses a display panel. The display panel comprises a base substrate; at least one through hole penetrating the base substrate; and a first laser-induced graphene portion formed on a first surface of the base substrate adjacent to the at least one through hole.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2023-0099907, filed on Jul. 31, 2023, the contents of which are hereby incorporated by reference in their entirety. Technical Field

[0003] The present disclosure relates to a display panel and a method for manufacturing the display panel. Background Art

[0004] As information technology develops, the importance of display devices as a connection medium between users and information is increasing. In response to this, the use of display devices such as liquid crystal display devices and organic light emitting display devices is increasing.

[0005] The display device may include a display panel, and the display panel may display an image based on an image signal (or a data signal) provided from the driving integrated circuit. Utility Model Content

[0006] The embodiment may provide a display panel and a method of manufacturing the display panel in which a wiring connected to a data driving integrated circuit may be easily formed.

[0007] An embodiment of a display panel includes: a base substrate; at least one through hole penetrating the base substrate; and a first laser induced graphene portion formed on a first surface of the base substrate adjacent to the at least one through hole.

[0008] The first laser-induced graphene portion may have hydrophilicity.

[0009] The first surface may include a portion of an upper surface, a portion of a lower surface, and a side surface of the base substrate adjacent to the at least one through hole.

[0010] The display panel may further include: at least one wiring corresponding to the at least one through hole.

[0011] The at least one wiring may include at least one of a conductive ink and a conductive resin.

[0012] At least one wiring may be in contact with the first laser induced graphene portion.

[0013] The display panel may further include: a second laser induced graphene portion formed on a second surface of the base substrate that is spaced apart from the at least one through hole and does not overlap the first surface.

[0014] The second laser-induced graphene portion may have water repellency.

[0015] The second surface may include a portion of the upper surface of the base substrate spaced apart from the at least one through-hole.

[0016] The second laser-induced graphene portion may be in contact with the first laser-induced graphene portion.

[0017] An embodiment of a method for manufacturing a display panel includes: forming at least one through hole penetrating a base substrate; and forming a first laser-induced graphene portion by irradiating a carbon dioxide laser together with a first gas to a first area overlapping the at least one through hole and a portion of the base substrate adjacent to the at least one through hole.

[0018] The first laser induced graphene portion may be formed on a portion of an upper surface, a portion of a lower surface, and a side surface of the base substrate adjacent to the at least one through hole.

[0019] The first gas may include air or oxygen.

[0020] The first laser-induced graphene portion may have hydrophilicity.

[0021] The method of manufacturing a display panel may further include forming at least one wiring corresponding to the at least one through hole, and the at least one wiring may be in contact with the first laser induced graphene portion.

[0022] The method of manufacturing a display panel may further include forming a second laser induced graphene portion by irradiating a carbon dioxide laser together with a second gas to a second region spaced apart from the at least one through hole and overlapping a portion of the base substrate.

[0023] The second laser induced graphene portion may be formed on a portion of the upper surface of the base substrate spaced apart from the at least one through hole.

[0024] The second gas may include at least one of argon and hydrogen.

[0025] The second laser-induced graphene portion may have water repellency.

[0026] The method of manufacturing a display panel may further include forming at least one wiring corresponding to the at least one through hole, and the at least one wiring may contact the first laser induced graphene portion and may not contact the second laser induced graphene portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features of the embodiments of the present disclosure will become more apparent by describing embodiments thereof in more detail with reference to the accompanying drawings.

[0028] Figure 1 is a diagram illustrating an embodiment of a display device.

[0029] Figure 2 is a diagram illustrating an embodiment of a display panel.

[0030] Figure 3 is a diagram illustrating an embodiment of a display panel.

[0031] Figure 4 is a diagram illustrating an embodiment of a display panel.

[0032] Figure 5 is a block diagram illustrating an embodiment of a method of manufacturing a display panel.

[0033] Figures 6 to 10 is a diagram for schematically illustrating an embodiment of a method of manufacturing a display panel. DETAILED DESCRIPTION

[0034] Hereinafter, the embodiments will now be described more fully with reference to the accompanying drawings in which various embodiments are shown. However, the utility model concept can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the disclosure will be thorough and complete, and these embodiments will fully convey the scope of the utility model concept to those skilled in the art.

[0035] The same number refers to the same element from beginning to end. In the accompanying drawings, for the sake of clarity, the thickness of a particular line, layer, component, element or feature may be exaggerated. It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the "first" element discussed below may also be referred to as the "second" element.

[0036] The terms used in this article are only used to describe the purpose of specific embodiments, and are not intended to limit. As used in this article, "one", "the (described)" and "at least one" do not represent quantitative restrictions, and unless the context clearly indicates otherwise, it is intended to include both singular and plural. For example, unless the context clearly indicates otherwise, "element" has the same meaning as the meaning of "at least one element". "At least one" should not be interpreted as a restrictive "one". As used in this article, the word "or" means logical "or", therefore, unless the context indicates otherwise, expression "A, B or C" means "A, B and C", "A and B but without C", "A and C but without B", "B and C but without A", "A but without B and without C", "B but without A and without C" and "C but without A and without B".

[0037] It will be further understood that when used in this specification, the terms “include” and “comprising” indicate the presence of stated features, integers, steps, operations, elements or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts or groups thereof.

[0038] Throughout the specification, when an element is referred to as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element or indirectly connected or coupled to the other element with one or more intervening elements interposed therebetween.

[0039] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element illustrated in the drawings to another element. It will be understood that relative terms are intended to include different orientations of the device in addition to the orientation depicted in the drawings. For example, if the device in one of the drawings is turned over, the element described as being on the "lower" side of the other elements will then be oriented on the "upper" side of the other elements. Therefore, depending on the specific orientation of the figure, the term "lower" can include both "lower" and "upper" orientations. Similarly, if the device in one of the drawings is turned over, the element described as being "below" or "below" the other elements will then be oriented "above" the other elements. Therefore, the term "below" or "below" can include both above and below orientations.

[0040] Unless otherwise defined, all terms (including technical and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which the present disclosure belongs. It will be further understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such in this article.

[0041] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0042] Figure 1 is a diagram illustrating an embodiment of a display device.

[0043] refer to Figure 1 , a display device DD according to an example may include a display panel DP and a data driving integrated circuit DDI.

[0044] The display device DD may be a device that is activated according to an electrical signal and displays an image. For example, the display device DD may be used as a display screen for portable electronic devices such as mobile phones, smart phones, tablet personal computers (PCs), mobile communication terminals, electronic notebooks, electronic books, portable multimedia players (PMPs), navigation devices, and ultra mobile PCs (UMPCs). In addition, the display device DD may be used as a display screen for various products such as televisions, laptop computers, monitors, billboards, and Internet of Things (IOT) devices.

[0045] The display panel DP may be a light-emitting display panel. For example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, a micro-LED display panel, or a nano-LED display panel. The display panel DP may be a flexible display panel.

[0046] The display panel DP may include a base substrate BSS, a pixel circuit layer PCL, and a display element layer DPL.

[0047] The base substrate BSS may provide a base surface on which the pixel circuit layer PCL is disposed. The base substrate BSS may be a flexible substrate that can be bent, folded, rolled, and the like.

[0048] At least one through hole VH may be formed in the base substrate BSS. At least one through hole VH may serve as an electrical connection path connecting multiple components (or layers). For example, at least one through hole VH may serve as an electrical connection path connecting the pixel circuit layer PCL and the data driver integrated circuit DDI. To this end, at least one through hole VH may be formed to penetrate the base substrate BSS. Figure 1 The number of through holes VH shown in is only an example, and the number of through holes VH is not limited thereto.

[0049] The wiring WR may be used to transmit a data signal (or data voltage) supplied from the data driver integrated circuit DDI to the pixel circuit layer PCL. The wiring WR may be disposed in at least one through hole VH. For example, the wiring WR may be formed in at least one corresponding through hole VH. The wiring WR may include a conductive material. That is, at least one through hole VH may be filled with a conductive material so that the pixel circuit layer PCL and the data driver integrated circuit DDI may be electrically connected to each other. Figure 1 A case is shown in which the wiring WR is not provided in the leftmost through-hole VH, but this is for convenience of description, and the wiring WR may also be provided in the leftmost through-hole VH.

[0050] The pixel circuit layer PCL may be disposed on the base substrate BSS. The pixel circuit layer PCL may include a pixel circuit configured to drive a light emitting element. For example, the pixel circuit may include a transistor connected to a wiring WR and receiving a data signal (or data voltage) transmitted from a data driving integrated circuit DDI through the wiring WR. In addition, the pixel circuit may further include a transistor, a storage capacitor, etc. that controls the current flowing through the light emitting element in response to the data signal (or data voltage).

[0051] The display element layer DPL may be disposed on the pixel circuit layer PCL. The display element layer DPL may include a light emitting element that emits light based on an electrical signal provided from the pixel circuit layer PCL. For example, the light emitting element may be an organic light emitting element, an inorganic light emitting element, an organic-inorganic light emitting element, a quantum dot light emitting element, a micron LED light emitting element, or a nano LED light emitting element.

[0052] In addition, the display panel DP may further include a thin film encapsulation layer disposed on the display element layer DPL to protect the light emitting element, a light control layer disposed on the thin film encapsulation layer to change the property of light emitted from the light emitting element, and the like.

[0053] The data driving integrated circuit DDI may be disposed below the display panel DP. For example, the data driving integrated circuit DDI may be disposed on the lower surface BSS_LA of the base substrate BSS (see FIG. Figure 2 ) on a portion of the wiring WR. The data drive integrated circuit DDI may be connected to the wiring WR. The data drive integrated circuit DDI may generate an analog image data signal based on a digital image data signal transmitted from the timing controller and a gamma voltage transmitted from a power supply. Here, the analog image data signal may refer to the above-mentioned data signal (or data voltage). That is, the data drive integrated circuit DDI may generate a data signal (or data voltage) and supply the data signal (or data voltage) to the wiring WR.

[0054] Meanwhile, the wiring WR may be formed by filling the corresponding through hole VH with a conductive material, drying and curing the conductive material. In this case, the number of through holes VH may be several thousand, and the size of the through hole VH may be as small as a micro level. Therefore, it may be difficult to quickly and accurately fill each through hole VH with a conductive material, making it difficult to form the wiring WR.

[0055] In addition, the conductive material having high viscosity may not properly fill the via hole VH and the conductive material having low viscosity may pass through the via hole VH, making it difficult to form the wiring WR.

[0056] Figure 2 is a diagram illustrating an embodiment of a display panel.

[0057] Figure 2 Representatively shown Figure 1 8. A base substrate BSS among the components of the display panel DP shown in FIG.

[0058] refer to Figure 2 The display panel DP_1 according to the embodiment may include a base substrate BSS, a first laser induced graphene portion LIG1, at least one wiring WR, and at least one through hole VH penetrating the base substrate BSS (see Figure 1 ).

[0059] In an embodiment, the base substrate BSS may consist of a single layer.

[0060] In an embodiment, the base substrate BSS may be made of a polymer material including at least one of polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, and polyarylate.

[0061] In an embodiment, the first laser induced graphene portion LIG1 may refer to graphene formed by irradiating laser to the surface of the base substrate BSS. For example, when laser is irradiated to the surface of the base substrate BSS made of a polymer material, the temperature of the surface of the base substrate BSS irradiated with laser is instantaneously increased, and the bonds or arrangements of carbon atoms are modified to form graphene. That is, the first laser induced graphene portion LIG1 may mean that a specific surface of the base substrate BSS irradiated with laser is patterned into graphene.

[0062] In embodiments, the first laser induced graphene portion LIG1 may be formed on a first surface of the base substrate BSS adjacent to the at least one through hole VH.

[0063] The first surface may include a side surface BSS_SA of the base substrate BSS adjacent to the at least one through hole VH. The side surface BSS_SA of the base substrate BSS may be a region exposed by forming at least one through hole VH penetrating the base substrate BSS. The side surface BSS_SA of the base substrate BSS may be a region adjacent to an inner surface of the at least one through hole VH. That is, the side surface BSS_SA of the base substrate BSS may be patterned into the first laser induced graphene portion LIG1.

[0064] The first surface may include a portion of the upper surface BSS_UA and a portion of the lower surface BSS_LA of the base substrate BSS adjacent to at least one through hole VH. A portion of the upper surface BSS_UA of the base substrate BSS may be a region adjacent to the entrance of at least one through hole VH. A portion of the lower surface BSS_LA of the base substrate BSS may be a region adjacent to the exit of at least one through hole VH. That is, a portion of the upper surface BSS_UA and a portion of the lower surface BSS_LA of the base substrate BSS may be patterned into the first laser induced graphene portion LIG1. Figure 2 A case where a portion of the upper surface BSS_UA and a portion of the lower surface BSS_LA of the base substrate BSS are patterned into the first laser induced graphene portion LIG1 is shown. However, a portion of the upper surface BSS_UA or a portion of the lower surface BSS_LA of the base substrate BSS may be patterned into the first laser induced graphene portion LIG1.

[0065] In an embodiment, the first laser induced graphene portion LIG1 may have hydrophilicity. For example, when the conductive material constituting the at least one wiring WR has hydrophilicity, the first laser induced graphene portion LIG1 may be formed to have hydrophilicity. However, when the conductive material constituting the at least one wiring WR has water repellency, the first laser induced graphene portion LIG1 may be formed to have water repellency.

[0066] When the first laser induced graphene portion LIG1 has hydrophilicity, a hydrophilic region may be formed on the inner surface of the at least one through hole VH. Therefore, when the conductive material having hydrophilicity is filled in the at least one through hole VH, the conductive material adheres to the first laser induced graphene portion LIG1 regardless of the viscosity of the conductive material, so that the at least one wiring WR can be easily and quickly formed.

[0067] When the first laser induced graphene portion LIG1 has hydrophilicity, a hydrophilic region may be formed in a region adjacent to an entrance and an exit of at least one through hole VH. Therefore, even if the conductive material having hydrophilicity is not accurately released to correspond to the entrance (or exit) of the through hole VH, the first laser induced graphene portion LIG1 induces movement of the conductive material so that at least one through hole VH may be filled with the conductive material. That is, even if the conductive material is not accurately released, at least one wiring WR may be easily and quickly formed.

[0068] In an embodiment, at least one wiring WR may be disposed in the corresponding at least one through hole VH (see Figure 1) and may be in contact with the first laser induced graphene portion LIG1. This is because, as described above, the conductive material having hydrophilicity and constituting at least one wiring WR adheres to the first laser induced graphene portion LIG1 having hydrophilicity.

[0069] At least one wiring WR may include a conductive ink CI (see Fig. 9 ) and conductive resin CR (see Fig. 9 ). For example, the conductive ink CI may include at least one of silver ink, polymer ink, carbon nanotube ink, carbon and graphene ink, dielectric ink, and copper ink. For example, the conductive resin CR may be a resin composition in which at least one conductive additive selected from carbon black, carbon fiber, metal powder, metal-coated inorganic powder, and metal fiber is mixed with a thermoplastic resin.

[0070] Figure 3 is a diagram illustrating an embodiment of a display panel. Figure 3 Representatively shown Figure 1 The base substrate BSS is one of the components of the display panel DP shown in FIG. Figure 3 , will omit Figure 2 Duplicate content will be described, and differences will be primarily noted.

[0071] refer to Figure 3 In an embodiment, the base substrate BSS may be composed of a plurality of layers. For example, the base substrate BSS may include a first base substrate BSS1, a barrier layer BRL, and a second base substrate BSS2.

[0072] The first base substrate BSS1 may provide a base surface on which the barrier layer BRL is disposed. The first base substrate BSS1 may be a flexible substrate that can be bent, folded, curled, etc. For example, the first base substrate BSS1 may be made of a polymer material including at least one of polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, and polyarylate.

[0073] The barrier layer BRL may be disposed on the first base substrate BSS1. The barrier layer BRL may cover the first base substrate BSS1. The barrier layer BRL may prevent moisture or air from penetrating from the outside. The barrier layer BRL may include an inorganic material. For example, the barrier layer BRL may include silicon oxide (SiO x ), Silicon Nitride (SiN x ) and silicon oxynitride (SiO x N y ) at least one of.

[0074] The second base substrate BSS2 may be disposed on the barrier layer BRL. The second base substrate BSS2 may be a flexible substrate that can be bent, folded, curled, etc. For example, the second base substrate BSS2 may be made of a polymer material including at least one of polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, and polyarylate. The second base substrate BSS2 may include a polymer material substantially the same as the first base substrate BSS1, but the second base substrate BSS2 is not limited thereto.

[0075] Figure 4 is a diagram illustrating an embodiment of a display panel. Figure 4 Representatively shown Figure 1 The base substrate BSS is one of the components of the display panel DP shown in FIG. Figure 4 , will omit Figure 2 Duplicate content will be described, and differences will be primarily noted.

[0076] refer to Figure 4 , the display panel DP_3 according to the embodiment may further include a second laser induced graphene portion LIG2.

[0077] In an embodiment, the second laser induced graphene portion LIG2 may refer to graphene formed by irradiating laser to a surface of the base substrate BSS on which the first laser induced graphene portion LIG1 is not formed. That is, the second laser induced graphene portion LIG2 may not overlap with the first laser induced graphene portion LIG1. The second laser induced graphene portion LIG2 may be formed in the same method as the first laser induced graphene portion LIG1 described above.

[0078] In an embodiment, the second laser induced graphene portion LIG2 may be formed on the base substrate BSS with at least one through hole VH (see Figure 1 ) on a second surface spaced apart.

[0079] The second surface may be a region that does not overlap with the first surface. The second surface may include an upper surface BSS_UA (see Figure 2 ) of a portion spaced apart from the at least one through hole VH. The second surface may include a portion of the upper surface BSS_UA of the base substrate BSS on which the first laser induced graphene portion LIG1 is not formed. That is, a portion of the upper surface BSS_UA of the base substrate BSS may be patterned into the second laser induced graphene portion LIG2 in contact with the first laser induced graphene portion LIG1. Figure 4 FIG. 4 shows a case where a portion of the upper surface BSS_UA of the base substrate BSS is patterned into the second laser induced graphene portion LIG2. However, the lower surface BSS_LA (see FIG. 4 ) of the base substrate BSS is Figure 2 ) that is spaced apart from the at least one through hole VH may also be patterned into a second laser induced graphene portion LIG2.

[0080] In an embodiment, the second laser induced graphene portion LIG2 may have a different chemical property from the first laser induced graphene portion LIG1. For example, when the first laser induced graphene portion LIG1 has hydrophilicity, the second laser induced graphene portion LIG2 may have water repellency. Conversely, when the first laser induced graphene portion LIG1 has water repellency, the second laser induced graphene portion LIG2 may have hydrophilicity.

[0081] When the second laser induced graphene portion LIG2 has water repellency, a water repellent region may be formed in a region spaced apart from the at least one through hole VH. Therefore, when a conductive material having hydrophilicity is released into the water repellent region, the second laser induced graphene portion LIG2 may repel the conductive material. As a result, since the conductive material does not adhere to the second laser induced graphene portion LIG2 but moves to adhere to the first laser induced graphene portion LIG1, the at least one through hole VH may be filled with the conductive material. That is, even if the conductive material is released throughout a large area, at least one wiring WR may be easily formed.

[0082] Meanwhile, the second laser induced graphene portion LIG2 may also be included in the display panel DP_2 (see Figure 3 )middle.

[0083] Figure 5 is a block diagram illustrating an embodiment of a method of manufacturing a display panel. Figures 6 to 10 is a diagram for schematically illustrating an embodiment of a method of manufacturing a display panel.

[0084] refer to Figure 5 and Figure 6 , the method of manufacturing a display panel according to the embodiment may include forming at least one through hole VH penetrating through a base substrate BSS (step S100 ).

[0085] The at least one through hole VH may be formed by various methods such as exposing and developing a photoresist and laser etching. The at least one through hole VH penetrating the base substrate BSS may be formed to expose the upper surface BSS_UA, the lower surface BSS_LA, and the side surface BSS_SA of the base substrate BSS. Figure 6 As shown in FIG. , the base substrate BSS may have a single-layer structure or a multi-layer structure (see FIG. Figure 3 ).

[0086] refer to Figure 5 and Figure 7, the method of manufacturing a display panel according to the embodiment may include forming a first laser induced graphene portion LIG1 (step S200 ).

[0087] The first laser induced graphene portion LIG1 may be formed by irradiating a carbon dioxide laser together with a first gas G1 to a first area A1 overlapping at least one through hole VH and a portion of the base substrate BSS adjacent to the at least one through hole VH.

[0088] The portion of the base substrate BSS overlapping the first area A1 may include a portion of the upper surface BSS_UA, a portion of the lower surface BSS_LA, and a side surface BSS_SA of the base substrate BSS. When the carbon dioxide laser is irradiated to the first area A1 together with the first gas G1, the first laser induced graphene portion LIG1 may be formed on the portion of the upper surface BSS_UA, the portion of the lower surface BSS_LA, and the side surface BSS_SA of the base substrate BSS.

[0089] In an embodiment, the wavelength of the carbon dioxide laser irradiated from the carbon dioxide laser device CDL may be 10 μm to 11 μm. Preferably, the wavelength of the carbon dioxide laser irradiated from the carbon dioxide laser device CDL may be 10.6 μm.

[0090] Depending on the type of gas irradiated with the carbon dioxide laser, the chemical properties of the graphene formed on the surface of the base substrate BSS may be determined. In an embodiment, the first gas G1 may include air or oxygen. Accordingly, the first laser induced graphene portion LIG1 overlapping the first area A1 may have hydrophilicity.

[0091] Although not in Figure 7 , but forming the first laser induced graphene portion LIG1 (step S200) may be performed in a chamber under a vacuum environment. In this case, irradiation of the carbon dioxide laser and the first gas G1 is easy, so that the first laser induced graphene portion LIG1 may be formed more efficiently.

[0092] refer to Figure 5 and Figure 8 According to an embodiment, the method for manufacturing a display panel may further include forming a second laser induced graphene portion LIG2 (step S300). According to an embodiment, forming the second laser induced graphene portion LIG2 (step S300) may be omitted.

[0093] The second laser induced graphene portion LIG2 may be formed by irradiating a carbon dioxide laser together with a second gas G2 to a second region A2 overlapping a portion of the base substrate BSS spaced apart from the at least one through hole VH.

[0094] The second area A2 may be an area adjacent to the first area A1 and not overlapping the first area A1. The portion of the base substrate BSS overlapping the second area A2 may include a portion of the upper surface BSS_UA of the base substrate BSS. That is, the portion of the base substrate BSS overlapping the second area A2 may be a portion of the upper surface BSS_UA of the base substrate BSS on which the first laser induced graphene portion LIG1 is not formed. When the carbon dioxide laser is irradiated to the second area A2 together with the second gas G2, the second laser induced graphene portion LIG2 in contact with the first laser induced graphene portion LIG1 may be formed on a portion of the upper surface BSS_UA of the base substrate BSS.

[0095] The wavelength of the carbon dioxide laser irradiated from the carbon dioxide laser device CDL may be the same as the wavelength of the carbon dioxide laser when forming the first laser-induced graphene portion LIG1 (step S200 ).

[0096] In an embodiment, the second gas G2 may include at least one of argon and hydrogen. Accordingly, the second laser induced graphene portion LIG2 overlapping the second area A2 may have water repellency.

[0097] Although not in Figure 8 , but forming the second laser induced graphene portion LIG2 (step S300) may be performed in a chamber under a vacuum environment. In this case, irradiation of the carbon dioxide laser and the second gas G2 is easy, so that the second laser induced graphene portion LIG2 may be formed more efficiently.

[0098] refer to Figure 5 , Fig. 9 and Fig.10 The manufacturing method of the display panel according to the embodiment may include forming at least one through hole VH (see Figure 6 ) corresponds to at least one wiring WR (step S400). Fig. 9 A method of forming at least one wiring WR corresponding to at least one through hole VH when forming the first laser induced graphene portion LIG1 is shown. Fig.10 A method of forming at least one wiring WR corresponding to at least one through hole VH when forming the first laser induced graphene portion LIG1 and the second laser induced graphene portion LIG2 is shown.

[0099] refer to Fig. 9, a conductive material including at least one of the conductive ink CI and the conductive resin CR and having hydrophilicity may be released to the region LIGA1 overlapping the first laser induced graphene portion LIG1. The region LIGA1 overlapping the first laser induced graphene portion LIG1 may overlap with at least one through hole VH. The released conductive material may adhere to the first laser induced graphene portion LIG1 and fill the at least one through hole VH. Thereafter, at least one wiring WR may be formed by drying and curing the conductive material filled in the at least one through hole VH.

[0100] refer to Fig.10 , a conductive material including at least one of the conductive ink CI and the conductive resin CR may be released to a region LIGA1 overlapping the first laser induced graphene portion LIG1 and a region LIGA2 overlapping the second laser induced graphene portion LIG2.

[0101] The conductive material released to the region LIGA2 overlapping the second laser induced graphene portion LIG2 does not adhere to the second laser induced graphene portion LIG2 but moves to adhere to the first laser induced graphene portion LIG1. That is, even if the conductive material is released to the region LIGA2 overlapping the second laser induced graphene portion LIG2, the conductive material may be filled in at least one through hole VH.

[0102] exist Fig. 9 In the case of , since the conductive material must be released to the region LIGA1 overlapping the first laser induced graphene portion LIG1, the range in which the conductive material is released may be limited. Fig.10 In this case, since the conductive material may be released to a region other than the region LIGA1 overlapping the first laser induced graphene portion LIG1, a range in which the conductive material is released may be expanded.

[0103] According to the embodiment, wirings connected to a data driving integrated circuit can be accurately and quickly formed on a display panel, and accordingly, the tact time of the display panel can be shortened.

[0104] Although the present disclosure has been described with reference to the embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made thereto without departing from the scope and spirit of the present disclosure as set forth in the claims.

Claims

1. A display panel, comprising: base substrate; at least one through hole penetrating the base substrate; as well as A first laser induced graphene portion is formed on a first surface of the base substrate adjacent to the at least one through hole.

2. The display panel according to claim 1, wherein: The first laser-induced graphene portion has hydrophilicity.

3. The display panel according to claim 1, wherein: The first surface includes a portion of an upper surface, a portion of a lower surface, and a side surface of the base substrate adjacent to the at least one through hole.

4. The display panel according to claim 1 or 2, further comprising: At least one wiring corresponds to the at least one through hole.

5. The display panel according to claim 4, wherein: The at least one wiring includes at least one of a conductive ink and a conductive resin.

6. The display panel according to claim 4, wherein: The at least one wiring is in contact with the first laser-induced graphene portion.

7. The display panel according to claim 1, further comprising: A second laser induced graphene portion is formed on a second surface of the base substrate that is spaced apart from the at least one through hole and does not overlap the first surface.

8. The display panel according to claim 7, wherein: The second laser-induced graphene portion is water-repellent.

9. The display panel according to claim 7, wherein: The second surface includes a portion of an upper surface of the base substrate spaced apart from the at least one through hole.

10. The display panel according to claim 9, wherein: The second laser-induced graphene portion is in contact with the first laser-induced graphene portion.

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