Touch panel and touch display device including the same

Abstract

Embodiments of the present disclosure relate to a touch panel and a touch display device having the touch panel. In the provided touch panel, a first insulating layer is provided on the display panel, a plurality of first touch electrodes are provided on the first insulating layer, a second insulating layer is provided on the first touch electrodes, a plurality of second touch electrodes are provided on the second insulating layer, and a third insulating layer is provided on the second insulating layer provided with the second touch electrodes. The first touch electrodes overlap with the second touch electrodes, and at least one of the first insulating layer, the second insulating layer, and the third insulating layer includes multiple layers with different refractive indices, thereby improving the visibility of the touch display device.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2020-0188233, filed on December 30, 2020, which is hereby incorporated by reference in its entirety for all purposes. Technical Field

[0003] The present disclosure relates to a touch panel and a touch display device including the touch panel, and more particularly to a touch panel having excellent viewing angle characteristics and a touch display device including the touch panel. Background Art

[0004] A touch display device may include a display panel for displaying an image and a touch panel for receiving a user's touch.

[0005] Various display panels can be used, including liquid crystal display panels, plasma display panels, and electroluminescent display panels, such as organic light-emitting display panels. Electroluminescent display panels, in particular, offer excellent viewing angles and contrast, and do not require a separate light source. Consequently, the weight and thickness of the display panel can be reduced, and they offer advantages in terms of power consumption.

[0006] In addition, the touch panel is implemented to detect an input signal of a user's hand or an object.

[0007] However, if the display panel of the touch display device is an electroluminescent display panel, there may be a problem of deterioration in visibility due to external light reflection. Summary of the Invention

[0008] The inventors of the present disclosure have invented a touch panel of a novel structure capable of improving visibility even when an electroluminescent display panel is used as a display panel of a touch display device, and a touch display device of a novel structure including the touch panel.

[0009] Embodiments of the present disclosure may provide a touch panel capable of reducing external light reflection and a touch display device including the touch panel.

[0010] Embodiments of the present disclosure may provide a touch panel capable of improving visibility and a touch display device including the touch panel.

[0011] The problems to be solved according to the embodiments of the present disclosure are not limited to the above-mentioned problems, and those skilled in the art can clearly understand other problems not mentioned from the following description.

[0012] In one aspect, embodiments of the present disclosure may provide a touch display device capable of reducing external light reflection and improving visibility.

[0013] In one aspect, at least one first insulating layer is provided on the display panel, and a plurality of first touch electrodes are provided on the first insulating layer. At least one second insulating layer is provided on the first touch electrodes. A plurality of second touch electrodes are provided on the second insulating layer, and a third insulating layer is provided on the second insulating layer provided with the second touch electrodes.

[0014] Each of the plurality of first touch electrodes and each of the plurality of second touch electrodes overlap each other.

[0015] Furthermore, at least one of the first insulating layer, the second insulating layer, and the third insulating layer includes a plurality of layers having different refractive indices.

[0016] In another aspect, embodiments of the present disclosure may provide a touch panel capable of reducing external light reflection and improving visibility.

[0017] A first high refractive index layer is provided on the first low refractive index layer, and a plurality of first touch electrodes are provided on the first high refractive index layer. A second low refractive index layer is provided on the first touch electrodes, and a plurality of second touch electrodes are provided on the second low refractive index layer. A second high refractive index layer is provided on the second touch electrodes, and a third low refractive index layer is provided on the second high refractive index layer.

[0018] Each of the plurality of first touch electrodes and each of the plurality of second touch electrodes overlap with each other.

[0019] Furthermore, at least one hole is provided in at least one of the first high refractive index layer, the second high refractive index layer, and the second low refractive index layer, the hole not overlapping with the plurality of first touch electrodes and the plurality of second touch electrodes.

[0020] According to an embodiment of the present disclosure, by configuring at least one insulating layer provided on the touch panel to have at least one hole or a recessed portion, external light can be trapped inside the touch panel and cannot be emitted to the outside, thereby reducing external light reflection.

[0021] According to an embodiment of the present disclosure, a touch panel can be provided, wherein, among a plurality of insulating layers provided on the touch panel, insulating layers having the same or similar refractive index are continuously provided, thereby preventing stains from being recognized due to external light being emitted to the outside of the touch panel, thereby improving visibility.

[0022] Effects of the present disclosure are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A system configuration of a touch display device according to an embodiment of the present disclosure is shown.

[0024] Figure 2 The structure of a touch panel including a plurality of touch electrodes in a touch display device according to an embodiment of the present disclosure is schematically shown.

[0025] Figure 3 An arrangement relationship between a display panel and a touch panel according to an exemplary embodiment of the present disclosure is shown.

[0026] Figure 4 FIG. 1 schematically illustrates another arrangement structure of electrodes included in a touch panel according to an embodiment of the present disclosure.

[0027] Figure 5 The specific structure of the active area of ​​the display panel of the touch display device according to the embodiment of the present disclosure and the structure of the touch panel provided on the display panel are shown.

[0028] Figure 6 is a plan view schematically showing the structure of a touch panel according to the first embodiment of the present disclosure.

[0029] Figure 7 It is along Figure 6 The cross-sectional view is obtained along the line AB in FIG.

[0030] Figure 8 is a plan view schematically showing the structure of a touch panel according to a second embodiment of the present disclosure.

[0031] Figure 9 It is along Figure 8 The cross-sectional view is obtained along line CD.

[0032] Figure 10 is a plan view schematically showing the structure of a touch panel according to a third embodiment of the present disclosure.

[0033] Figure 11 It is along Figure 10 The cross-sectional view is obtained along line EF.

[0034] Figure 12 is a plan view schematically showing the structure of a touch panel according to a fourth embodiment of the present disclosure.

[0035] Figure 13 It is along Figure 12 A cross-sectional view taken along line GH in FIG.

[0036] Figure 14 is a plan view schematically showing the structure of a touch panel according to a fifth embodiment of the present disclosure.

[0037] Figure 15 It is along Figure 14 A sectional view obtained along line IJ.

[0038] Figure 16 is a plan view schematically showing the structure of a touch panel according to a sixth embodiment of the present disclosure.

[0039] Figure 17 It is along Figure 16 A cross-sectional view taken along line KL in FIG. DETAILED DESCRIPTION

[0040] In the following description of examples or embodiments of the present disclosure, reference will be made to the accompanying drawings that exemplarily show examples or embodiments that can be implemented, and in the accompanying drawings, the same figure numerals and symbols may be used to represent the same or similar components, even if they are shown in different drawings. Further, in the following description of examples or embodiments of the present disclosure, if it is determined that a detailed description of a well-known function or component introduced herein may make the subject matter in some embodiments of the present disclosure unclear, then the description will be omitted. Unless used in conjunction with the term "only", terms such as "including", "having", "comprising", "consisting of", and "formed by" used herein should generally allow for the addition of other components. Unless otherwise clearly indicated in the context, the singular form used herein should include the plural form.

[0041] Terms such as "first," "second," "A," "B," "(A)," or "(B)" may be used herein to describe elements of the present disclosure. Each term is not used to define the nature, sequence, order, or quantity of the elements, etc., but is only used to distinguish the corresponding element from other elements.

[0042] When referring to a first component being “connected or coupled”, “contacting or overlapping”, etc., with a second component, it should be understood that the first component may not only be “directly connected or coupled” or “directly contacting or overlapping” with the second component, but also that a third component may be “interposed” between the first and second components, or that the first and second components may be “connected or coupled”, “contacting or overlapping”, etc., with each other via a fourth component. Here, the second component may be included in at least one of the two or more components that are “connected or coupled”, “contacting or overlapping”, etc., with each other.

[0043] When time-related terms such as “after,” “subsequently,” “next,” and “before” are used to describe a process or operation of a component or configuration, or to describe a flow or step in an operation, process, or method of manufacture, unless used with the terms “directly” or “immediately,” these terms may be used to describe non-sequential or non-sequential processes or operations.

[0044] In addition, when referring to any size, relative size, etc., even if no relevant description is specified, it should be considered that the numerical value or corresponding information (such as level, range, etc.) of the element or feature includes tolerances or error ranges that may be caused by various factors (such as process factors, internal or external influences, noise, etc.). Furthermore, the term "may" fully includes all meanings of the term "may".

[0045] Each feature of the different embodiments of the present disclosure may be combined in part or in whole, and may be technically related and driven to each other. In addition, the different embodiments may be implemented independently of each other or implemented together in an associated relationship.

[0046] A touch display device according to an embodiment of the present disclosure may include at least one first insulating layer disposed on a display panel, a plurality of first touch electrodes disposed on the first insulating layer, at least one second insulating layer disposed on the first touch electrodes, a plurality of second touch electrodes disposed on the second insulating layer, and at least one third insulating layer disposed on the second touch electrodes. Each of the plurality of first touch electrodes may overlap with each of the plurality of second touch electrodes, and at least one of the first insulating layer, the second insulating layer, and the third insulating layer may include multiple layers having different refractive indices.

[0047] The first insulating layer may include a first low refractive index layer arranged on the display panel and a first high refractive index layer arranged on the first low refractive index layer, the second insulating layer may include a second low refractive index layer arranged on the plurality of first touch electrodes, and the third insulating layer may include a second high refractive index layer arranged on the plurality of second touch electrodes and a third low refractive index layer arranged on the second high refractive index layer.

[0048] The second low refractive index layer may include at least one first hole disposed in an area that does not overlap with each of the plurality of first touch electrodes and the plurality of second touch electrodes, and the first hole may expose a portion of a lower surface of the second high refractive index layer. The first high refractive index layer and the first low refractive index layer may be disposed in the first hole.

[0049] Furthermore, the overlapping first and second touch electrodes may intersect with other adjacent first and second touch electrodes at least twice, and an opening may be provided between the intersections of the first and second touch electrodes and other adjacent first and second touch electrodes. The first hole may overlap with the opening.

[0050] The first high refractive index layer may include at least one second hole disposed in an area that does not overlap with each of the plurality of first touch electrodes and the plurality of second touch electrodes, and the second hole may expose a portion of a lower surface of the second low refractive index layer. The first low refractive index layer and the second low refractive index layer may contact each other through the second hole.

[0051] In addition, the overlapping first touch electrodes and the second touch electrodes are twisted at least once, the overlapping first touch electrodes and the second touch electrodes can cross with other adjacent first touch electrodes and the second touch electrodes at least twice, and an opening is set between one intersection point of the first touch electrode and the second touch electrode and another adjacent intersection point.

[0052] Furthermore, one opening and another adjacent opening may be provided to be spaced apart from each other, and at least one second hole may be further provided in a region where the openings are spaced apart from each other.

[0053] Here, the second hole may have a closed curve shape.

[0054] The second high refractive index layer may include at least one third hole overlapping with the at least one second hole. The third hole may expose a portion of the lower surface of the third low refractive index layer. The second low refractive index layer and the third low refractive index layer may contact each other through the third hole.

[0055] The shape of the third hole may correspond to the shape of the second hole overlapping the third hole.

[0056] The second high refractive index layer may be disposed on a portion of the upper surface of the second low refractive index layer and may not overlap with the second hole of the first high refractive index layer.

[0057] In addition, the second high refractive index layer may include at least one depressed portion, and the depressed portions may be spaced apart from each other.

[0058] The overlapping first and second touch electrodes may intersect with other adjacent first and second touch electrodes at least twice, and an opening may be provided between the intersections of the first and second touch electrodes and other adjacent first and second touch electrodes. The recess may overlap with the opening.

[0059] At least one recess may further be provided in a region between one opening and another adjacent opening.

[0060] The first insulating layer of the touch display device may include a first low refractive index layer arranged on the display panel and a first high refractive index layer arranged on the first low refractive index layer, the second insulating layer may include a second high refractive index layer arranged on the multiple first touch electrodes, and the third insulating layer may include a third high refractive index layer arranged on the multiple second touch electrodes and a second low refractive index layer arranged on the third high refractive index layer.

[0061] Here, a portion of the first high refractive index layer and a portion of the second high refractive index layer may be in contact with each other, and a portion of the second high refractive index layer and a portion of the third high refractive index layer may be in contact with each other.

[0062] A touch panel according to an embodiment of the present disclosure may include a first high refractive index layer disposed on a first low refractive index layer, a plurality of first touch electrodes disposed on the first high refractive index layer, a second low refractive index layer disposed on the first touch electrodes, a plurality of second touch electrodes disposed on the second low refractive index layer, a second high refractive index layer disposed on the second touch electrodes, and a third low refractive index layer disposed on the second high refractive index layer. Each of the plurality of first touch electrodes and each of the plurality of second touch electrodes may overlap with each other, and at least one hole may be provided in at least one of the first high refractive index layer, the second high refractive index layer, and the second low refractive index layer, and the hole may not overlap with the plurality of first touch electrodes and the plurality of second touch electrodes.

[0063] The hole of the first high refractive index layer may overlap with a portion of the first low refractive index layer, and the second low refractive index layer and the first low refractive index layer may contact each other through the hole of the first high refractive index layer.

[0064] The hole of the second high refractive index layer may overlap with a portion of the second low refractive index layer, and the second low refractive index layer and the third low refractive index layer may contact each other through the hole of the second high refractive index layer.

[0065] The hole of the second low refractive index layer may overlap with a portion of the first high refractive index layer, and the first high refractive index layer and the second high refractive index layer may contact each other through the hole of the second low refractive index layer.

[0066] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0067] Figure 1 A system configuration of a touch display device according to an embodiment of the present disclosure is shown.

[0068] refer to Figure 1 , a touch display device according to an embodiment of the present disclosure may provide an image display function for displaying an image and a touch sensing function for sensing a user's touch.

[0069] The touch display device 100 according to an embodiment of the present disclosure may include a display panel 110 provided with data lines and gate lines for displaying an image, and a display driving circuit for driving the display panel 110 .

[0070] The display driving circuit may include a data driving circuit DDC for driving data lines, a gate driving circuit GDC for driving gate lines, and a display controller D-CTR for controlling the data driving circuit DDC and the gate driving circuit GDC.

[0071] The touch display device 100 according to an embodiment of the present disclosure may include a touch panel 120 provided with a plurality of touch electrodes to function as a touch sensor for sensing touch, and a touch sensing circuit TSC for driving the touch panel 120 and performing a touch sensing process.

[0072] The touch sensing circuit TSC may provide a driving signal to the touch panel 120 to drive the touch panel 120 , may detect a sensing signal from the touch panel 120 , and may sense the presence or absence of a touch and / or a touch position (touch coordinates) based on the sensing signal.

[0073] The touch sensing circuit TSC may include a touch driving circuit TDC for providing a driving signal and receiving a sensing signal, and a touch controller T-CTR for calculating whether a touch exists and / or a touch position (touch coordinates).

[0074] The touch sensing circuit TSC may be implemented as one or more components (eg, integrated circuits) and may be implemented separately from the display driving circuit.

[0075] Furthermore, the entire touch sensing circuit TSC or a portion of the touch sensing circuit TSC may be implemented by integrating it with a display driver circuit or one or more internal circuits of the display driver circuit. For example, the touch driver circuit TDC of the touch sensing circuit TSC may be implemented together with the data driver circuit DDC of the display driver circuit as an integrated circuit.

[0076] Meanwhile, the touch display device 100 according to an embodiment of the present disclosure may sense a touch based on capacitance formed in the touch electrode TE.

[0077] For example, the touch display device 100 according to an embodiment of the present disclosure can use a mutual capacitance-based touch sensing method and / or a self-capacitance-based touch sensing method as a capacitance-based touch sensing method to sense touch. However, in the following description, for ease of explanation, the touch display device 100 according to an embodiment of the present disclosure is mainly described in comparison with the mutual capacitance-based touch sensing method.

[0078] Figure 2The structure of a touch panel including a plurality of touch electrodes in a touch display device according to an embodiment of the present disclosure is schematically shown. Figure 3 An arrangement relationship between a display panel and a touch panel according to an exemplary embodiment of the present disclosure is shown.

[0079] refer to Figure 2 , a plurality of touch electrodes TE are provided on the touch panel 120 , and touch lines TL for electrically connecting the touch electrodes TE and the touch sensing circuit TSC may be provided.

[0080] The plurality of touch electrodes TE may be formed in a mesh shape including a plurality of openings OP.

[0081] In addition, a touch pad for contacting the touch sensing circuit TSC may exist in the touch panel 120 in order to electrically connect the touch line TL and the touch sensing circuit TSC.

[0082] The touch electrodes TE and the touch lines TL may be provided at the same layer or at different layers.

[0083] Meanwhile, if the touch display device 100 uses a touch sensing method based on mutual capacitance, two or more touch electrodes TE arranged in the same row (or the same column) may be electrically connected to form a driving touch electrode line. Two or more touch electrodes TE arranged in the same column (or the same row) may be electrically connected to form a sensing touch electrode line.

[0084] exist Figure 2 In the example, two or more touch electrodes TE forming one driving touch electrode line may be integrated and electrically connected, and two or more touch electrodes TE forming one sensing touch electrode line may also be integrated and electrically connected.

[0085] Here, two or more touch electrodes TE forming one driving touch electrode line may be referred to as a driving touch electrode TE1 , and two or more touch electrodes TE forming one sensing touch electrode line may be referred to as a sensing touch electrode TE2 .

[0086] At least one touch line TL may be connected to each driving touch electrode line, and at least one touch line TL may be connected to each sensing touch electrode line.

[0087] At least one touch line TL connected to each driving touch electrode line may be referred to as a driving touch line TL, and at least one touch line TL connected to each sensing touch electrode line may be referred to as a sensing touch line TL.

[0088] One touch pad may be connected to each touch line TL.

[0089] refer to Figure 2As an example, each of the plurality of touch electrodes TE may have a diamond-shaped outline, and in some cases may have a rectangular shape (which may include a square), or may have different shapes.

[0090] The shape of the touch electrode TE may be designed in various ways in consideration of the display performance and touch performance of the touch display device 100 .

[0091] In the structure of the plurality of touch electrodes TE provided on the touch panel 120 , the first touch electrodes 260 and the second touch electrodes 270 provided on different layers overlap with each other with at least one insulating layer IL1 interposed therebetween.

[0092] Figure 2 The touch panel 120 shown is illustrated as being elongated in the column direction, but may be designed to be elongated in the row direction depending on the type or design of the touch display device 100 (eg, TV, monitor, mobile terminal, etc.).

[0093] The touch panel 120 according to the embodiment may be provided outside the display panel 110 (external type) or inside the display panel 110 (internal type).

[0094] If the touch panel 120 is an external type, the touch panel 120 and the display panel 110 may be manufactured separately through different panel manufacturing processes, and then the touch panel 120 and the display panel 110 may be attached to each other.

[0095] If the touch panel 120 is a built-in type, the touch panel 120 and the display panel 110 may be manufactured together through a single panel manufacturing process.

[0096] refer to Figure 2 and Figure 3 The display panel 110 may include an active area A / A for displaying an image and a non-active area N / A outside the active area A / A. Here, the active area A / A is also referred to as a display area, and the non-active area N / A is also referred to as a non-display area.

[0097] A plurality of sub-pixels defined by the data lines and the gate lines may be disposed in the active area A / A.

[0098] Wiring and pads for connecting the data lines, gate lines, and various signal lines in the active area A / A to the display driving circuit may be provided in the non-active area N / A.

[0099] A plurality of touch electrodes TE and a plurality of touch lines TL may be provided on the touch panel 120 .

[0100] The plurality of touch electrodes TE may be disposed to correspond to the active area A / A of the display panel 110 .

[0101] A plurality of touch lines TL may be disposed to correspond to the non-active area N / A of the display panel 110 .

[0102] That is, the plurality of touch lines TL may exist outside the touch electrode region (the active region A / A or a corresponding region) where the plurality of touch electrodes TE are provided.

[0103] The touch panel 120 may be built into or external to the display panel 110 .

[0104] As described above, since the touch electrode TE is provided in the active area A / A of the display panel 110 and the touch line TL is provided in the non-active area N / A of the display panel 110, touch sensing matching the display state of the screen can be provided.

[0105] Further, refer to Figure 2 , each of the plurality of touch lines TL is electrically connected to the touch sensing circuit TSC.

[0106] Meanwhile, the structure of the electrodes included in the touch panel according to the embodiment of the present disclosure is not limited to Figure 2 The structure shown in .

[0107] Figure 4 FIG. 1 schematically illustrates another arrangement structure of electrodes included in a touch panel according to an embodiment of the present disclosure.

[0108] In the following description, the contents repeated with the above-described embodiment may be omitted. In addition, in the following description, the same reference numerals may be used for the same elements as those of the above-described embodiment.

[0109] refer to Figure 4 The touch panel 120 of the touch display device 100 may include a plurality of first touch electrodes 260 (or first touch electrodes) and a plurality of second touch electrodes 270. The touch panel 120 may be driven by sensing a change in capacitance formed between the first touch electrodes 260 and the second touch electrodes 270.

[0110] In addition, the first touch electrodes 260 and the second touch electrodes 270 may be disposed to overlap with each other at least in a partial area of ​​the touch panel 120 .

[0111] Portions of the first touch electrode 260 and the second touch electrode 270 that overlap each other may extend in the first direction.

[0112] Furthermore, other portions of the mutually overlapping first touch electrodes 260 and second touch electrodes 270 may extend in a second direction intersecting the first direction. Furthermore, the mutually overlapping first touch electrodes 260 and second touch electrodes 270 extending in the second direction may intersect at least twice with other mutually overlapping first touch electrodes 260 and second touch electrodes 270 extending in the second direction.

[0113] An opening 410 may be provided between intersections of mutually overlapping first and second touch electrodes 260 and 270 and adjacent other first and second touch electrodes 260 and 270. Accordingly, a plurality of openings 410 may exist in the touch panel 120.

[0114] Here, a plurality of openings 410 may be formed by the first and second touch electrodes 260 and 270 crossing different first and second touch electrodes 260 and 270 .

[0115] However, the structure of the present disclosure is not limited thereto, and some of the plurality of openings 410 may be formed by regions where at least two first touch electrodes 260 cross each other, or by regions where at least two second touch electrodes 270 cross each other.

[0116] In a plan view, the shape of the plurality of openings 410 may be a rhombus or a diamond. However, the shape of the plurality of openings 410 according to an embodiment of the present disclosure is not limited thereto and may be implemented in various shapes, such as a polygon, an ellipse, or a circle.

[0117] In addition, the touch panel 120 may include at least one disconnection portion 420 .

[0118] The disconnection portion 420 may be a region where at least one of the first touch electrode 260 and the second touch electrode 270 is disconnected from the other adjacent first touch electrode 260 or second touch electrode 270 .

[0119] For example, when the first touch electrodes 260 and the second touch electrodes 270 included in the touch panel 120 are electrically connected as a whole, if a part of the first touch electrode 260 and a part of the second touch electrode 270 are defective, the entire touch panel 120 may not work.

[0120] However, in this embodiment, by including a disconnected portion 420 as an area where at least one of the first touch electrode 260 and the second touch electrode 270 is disconnected, another second touch electrode 270 that is disconnected from the defective first touch electrode 260 or the second touch electrode 270 can be driven, thereby preventing the touch sensitivity of the touch panel 120 from being reduced.

[0121] In addition, if the touch panel 120 includes a plurality of disconnection portions 420 , the touch panel 120 may include at least one dummy pattern 480 .

[0122] The dummy pattern 480 may be a portion disconnected from the first touch electrode 260 or a portion disconnected from the second touch electrode 270. Furthermore, the dummy pattern 480 may be a portion where each of the first touch electrode 260 and the second touch electrode 270 is cut off. In this case, the dummy pattern 480 may have a structure where a portion of the first touch electrode 260 overlaps a portion of the second touch electrode 270.

[0123] Figure 4 The position and shape of the dummy pattern 480 are shown merely as an example, and the position and shape of the dummy pattern 480 may be modified in various ways.

[0124] Also, a ratio of an area occupied by the dummy pattern 480 to the size of one second touch electrode 270 or the first touch electrode 260 (dummy pattern ratio) may be changed in various ways.

[0125] Meanwhile, if the dummy pattern 480 does not exist in the touch panel 120 and a plurality of first touch electrodes 260 and a plurality of second touch electrodes 270 are arranged to cross other first touch electrodes 260 and second touch electrodes 270, there may be a visibility problem in which the outlines of the first touch electrodes 260 and the second touch electrodes 270 are visible on the screen.

[0126] However, by providing one or more dummy patterns 480 on the touch panel 120 , it is possible to prevent visibility problems that occur when the first touch electrodes 260 and the second touch electrodes 270 are patterned in a mesh shape.

[0127] In addition, by adjusting the presence or absence or the number (dummy pattern ratio) of the dummy pattern 480 of each second touch electrode 270 , the capacitance of each second touch electrode 270 can be adjusted, thereby improving touch sensitivity.

[0128] The touch panel 120 may be provided on the display panel 110 .

[0129] Will refer to Figure 5 To describe the configuration.

[0130] Figure 5 The specific structure of the active area of ​​the display panel of the touch display device according to the embodiment of the present disclosure and the structure of the touch panel provided on the display panel are shown.

[0131] Reference Figure 5, the display panel 110 may include a substrate 510 , a transistor 520 , an electroluminescent device 530 , and an encapsulation portion 540 .

[0132] The substrate 510 may be made of a material having a bendable or foldable property.

[0133] For example, the substrate 510 may include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyallyl ester, polyimide, polycarbonate, photoacrylic acid, or cellulose acetate propionate (CAP). However, the material of the substrate 510 according to the present disclosure is not limited thereto, and the substrate 510 may be formed of glass or an insulating metal film.

[0134] At least one transistor 520 may be disposed on the substrate 510 . Figure 5 The transistor 520 may be a driving transistor electrically connected to the electroluminescent device 530 .

[0135] The transistor 520 may include an active layer 521 , a gate electrode 523 , a source electrode 525 , and a drain electrode 526 .

[0136] In particular, at least one active layer 521 may be disposed on the substrate 510 .

[0137] Although not shown in the drawings, at least one buffer layer may be further disposed between the substrate 510 and the active layer 521 .

[0138] A gate insulating layer 522 including an inorganic insulating material may be disposed on the active layer 521 .

[0139] A gate electrode 523 may be provided on the gate insulating layer 522. Figure 5 5. The gate electrode 523 is shown in FIG. 5 as a single-layer configuration, but the gate electrode 523 according to the present disclosure may have a multi-layer structure of two or more layers.

[0140] An interlayer insulating layer 524 including an inorganic insulating material may be provided over the gate electrode 523 .

[0141] A source electrode 525 and a drain electrode 526 spaced apart from each other may be provided on the interlayer insulating layer 524. Figure 5 The source electrode 525 and the drain electrode 526 are shown as a single-layer configuration, but the structure of the source electrode 525 and the drain electrode 526 according to the present disclosure is not limited thereto. The source electrode 525 and the drain electrode 526 may have a multi-layer structure of two or more layers.

[0142] Each of the source electrode 525 and the drain electrode 526 may make contact with the active layer 521 through a contact hole provided in the interlayer insulating layer 524 and the gate insulating layer 522 .

[0143] A planarization layer 529 including an organic insulating material may be disposed on the source electrode 525 and the drain electrode 526 .

[0144] Although not shown in the drawings, a protective layer including an inorganic insulating material may be further provided between the source electrode 525 or the drain electrode 526 and the planarization layer 529 .

[0145] The electroluminescent device 530 may include a first electrode 531, a light-emitting layer 532, and a second electrode 533. Here, the first electrode 531 may be an anode of the electroluminescent device 530, and the second electrode 533 may be a cathode of the electroluminescent device 530. However, the configuration of the present disclosure is not limited thereto, and the first electrode 531 may be a cathode of the electroluminescent device 530, and the second electrode 533 may be an anode of the electroluminescent device 530.

[0146] Nevertheless, for convenience of description, a configuration in which the first electrode 531 of the electroluminescent device 530 is an anode and the second electrode 533 of the electroluminescent device 530 is a cathode will be described in the following description.

[0147] In the active area A / A of the display panel 110 , a plurality of first electrodes 531 may be disposed on the planarization layer 529 so as to be spaced apart from each other.

[0148] In addition, each first electrode 531 may be electrically connected to the source electrode 525 of one transistor 520 through a contact hole provided in the planarization layer 529 .

[0149] At the same time, although Figure 5 The structure in which the first electrode 531 of the electroluminescent device 530 is connected to the source electrode 525 of the transistor 520 is shown, but the structure according to the present disclosure is not limited thereto. The first electrode 531 may be connected to the drain electrode 526 of the transistor 520.

[0150] A bank 534 may be provided on a portion of an upper surface of the first electrode 531 and a portion of an upper surface of the planarization layer 529 .

[0151] The bank 534 may define an emission area EA and a non-emission area NEA in the active area A / A of the display panel 110. Specifically, in the active area A / A, a region where the bank 534 is provided may correspond to the non-emission area NEA, and a region where the bank 534 is not provided may correspond to the emission area EA.

[0152] The light-emitting layer 532 may be provided on the upper surface of the first electrode 531 that does not overlap with the bank 534. The light-emitting layer 532 may have a single layer structure or a double layer structure or a plurality of layers. For example, the light-emitting layer 532 may be configured to further include a hole transport layer, an electron transport layer, and the like. The light-emitting layer 532 may include a light-emitting material corresponding to the color of each sub-pixel, so that each sub-pixel included in the active area A / A displays a unique color.

[0153] If the light-emitting layer 532 is an organic material, the electroluminescent device 530 may be referred to as an organic light-emitting diode (OLED). If the light-emitting layer 532 is an inorganic material, the electroluminescent device 530 may be referred to as an inorganic light-emitting diode. For example, if a quantum dot material is used to form an inorganic light-emitting diode, the electroluminescent device 530 may be referred to as a quantum dot light-emitting diode.

[0154] The light-emitting layer 532 can be individually configured according to the unique color of each sub-pixel. However, the configuration of the light-emitting layer 532 according to the present disclosure is not limited thereto. If the color of all sub-pixels is white, the light-emitting layer can be formed as a common layer. The common layer can refer to a layer provided in all areas of the active area A / A.

[0155] A second electrode 533 may be provided on the light emitting layer 532 and the bank 534 .

[0156] The second electrode 533 may be disposed to overlap with the plurality of first electrodes 531 disposed in the active area A / A. In other words, the first electrodes 531 disposed in the active area A / A may have a structure in which one second electrode 533 is shared.

[0157] An encapsulation portion 540 capable of preventing moisture or foreign substances from penetrating into the electroluminescent device 530 may be disposed on the second electrode 533. The encapsulation portion 540 may include at least two encapsulation layers including an inorganic insulating material and at least one encapsulation layer including an organic insulating material.

[0158] In particular, the encapsulation portion 540 may include a first encapsulation layer 541 , a second encapsulation layer 542 , and a third encapsulation layer 543 .

[0159] The first encapsulation layer 541 may be disposed on the second electrode 533 and may include an inorganic insulating material.

[0160] The second encapsulation layer 542 may be disposed on the first encapsulation layer 541 and may include an organic insulating material.

[0161] The third encapsulation layer 543 may be disposed on the second encapsulation layer 542 and may include an inorganic insulating material.

[0162] The touch panel 120 may be disposed on the third encapsulation layer 543 .

[0163] The touch panel 120 may be attached to the third encapsulation layer 543 through an adhesive insulating film.

[0164] If external light is incident on the touch display device 100 including the touch panel 120 , the external light incident on the touch panel 120 may be reflected by a plurality of electrodes or wirings in the display panel 110 and may be recognized as smudges by the user.

[0165] In particular, if the touch display device 100 is viewed from a lateral direction (for example, a direction different from a direction perpendicular to the touch panel surface), external light reflected by the display panel 110 of the touch display device 100 may be refracted by components included in the touch panel 120, thereby significantly reducing the visibility of the touch display device.

[0166] Accordingly, embodiments of the present disclosure can provide a touch panel having good visibility even when a user views the touch display device 100 from the side.

[0167] Figure 6 is a plan view schematically showing the structure of a touch panel according to the first embodiment of the present disclosure. Figure 7 It is along Figure 6 The cross-sectional view is obtained along the line AB in FIG.

[0168] In describing the present embodiment, descriptions of the same or corresponding components in the previous embodiment will be omitted. The touch panel 120 according to the present embodiment will be described below with reference to the previous embodiment.

[0169] At the same time, the following description will mainly describe Figure 4 The structure of the touch panel 120 shown in FIG. 1 is shown in FIG. 2 , but the structural features of the embodiment of the present disclosure can also be applied to Figure 2 touch panel 120 .

[0170] That is, reference Figure 6 The touch panel according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0171] For example, included in Figure 6 The first touch electrodes 260, the second touch electrodes 270, the openings 410, and the dummy patterns 480 in the touch panel 120 of the embodiment of the present invention may be the same as those in the reference embodiment. Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0172] The touch panel 120 according to the present embodiment may include a plurality of insulating layers. In addition, at least one of the plurality of insulating layers may include a first hole 660.

[0173] In particular, at least one first hole 660 of at least one of the plurality of insulating layers may be provided in a region overlapping with the opening 410 .

[0174] like Figure 6 As shown, one first hole 660 may be provided to correspond to one opening 410 .

[0175] In a plan view, the area of ​​one first hole 660 may be smaller than the area of ​​one opening 410 .

[0176] If the area of ​​one first hole 660 is larger than the area of ​​one opening 410 , the corresponding hole may overlap at least a portion of the first touch electrode 260 and / or the second touch electrode 270 defining the opening 410 overlapped by the first hole 660 .

[0177] If the touch electrodes overlap the first holes 660 , the first touch electrodes 260 and / or the second touch electrodes 270 may be exposed or may not be formed on a flat surface, thereby possibly reducing reliability.

[0178] In particular, if the thickness of the first touch electrodes 260 and the second touch electrodes 270 is formed very thin, the process reliability may be degraded and process errors may occur due to the step caused by the first hole 660. Therefore, touch reliability may also be degraded due to the improper formation of the first touch electrodes 260 and the second touch electrodes 270.

[0179] Although not shown in the figure, if Figure 2 If the first touch electrodes and the second touch electrodes are arranged in a grid as in the structure of FIG. 1 , the first holes 660 of the insulating layer can be arranged at the same position as the first touch electrodes. Figure 2 The opening OP overlaps in the area.

[0180] At the same time, although Figure 6 A structure in which one first hole 660 is provided to correspond to one opening 410 is shown, but the present disclosure is not limited thereto.

[0181] For example, two or more first holes 660 may be provided to correspond to one opening 410 , and in this case, each of the two or more first holes 660 may not overlap with the first touch electrode 260 and / or the second touch electrode 270 .

[0182] In particular, refer to Figure 7, the touch panel 120 may be disposed on the display panel 110 .

[0183] The touch panel 120 may include a first low refractive index layer 751 , a first high refractive index layer 752 , a first touch electrode 260 , a second low refractive index layer 653 , a second touch electrode 270 , a second high refractive index layer 754 , and a third low refractive index layer 755 .

[0184] The first low-refractive-index layer 751 of the touch panel 120 may be disposed on one surface of the display panel 110, and the first high-refractive-index layer 752 may be disposed on the first low-refractive-index layer 751. Furthermore, a plurality of first touch electrodes 260 may be disposed on the first high-refractive-index layer 752, and the second low-refractive-index layer 653 may be disposed on the plurality of first touch electrodes 260. A plurality of second touch electrodes 270 may be disposed on the second low-refractive-index layer 653, and the second high-refractive-index layer 754 may be disposed on the plurality of second touch electrodes 270. Furthermore, a third low-refractive-index layer 755 may be disposed on the second high-refractive-index layer 754.

[0185] Here, the refractive indices of the first to third low-refractive-index layers 751 , 653 , and 755 may be lower than those of the first and second high-refractive-index layers 752 and 754 .

[0186] In particular, the first low refractive index layer 751 of the touch panel 120 may be provided on one surface of the display panel 110. For example, the first low refractive index layer 751 may be provided on one surface of the display panel 110 where a user views the display panel 110.

[0187] The refractive index of the first low-refractive-index layer 751 may be 1.4 to 1.5, but the refractive index of the first low-refractive-index layer 751 of the present disclosure is not limited thereto.

[0188] In this case, the first low refractive index layer 751 may include an organic insulating material. The organic insulating material of the first low refractive index layer 751 may include an adhesive material. For example, the first low refractive index layer 751 may be an optically clear resin (OCR) or an optically clear adhesive (OCA), but the material of the first low refractive index layer 751 according to the present disclosure is not limited thereto.

[0189] A first high refractive index layer 752 may be disposed on the first low refractive index layer 751 .

[0190] The refractive index of the first high refractive index layer 752 may be 2 to 2.2, but the refractive index of the first high refractive index layer 752 is not limited thereto.

[0191] Here, the first high refractive index layer 752 may include an inorganic insulating material. For example, the first high refractive index layer 752 may include any one of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), but the material of the first high refractive index layer 752 according to the present disclosure is not limited thereto.

[0192] The first touch electrode 260 may be disposed on the first high refractive index layer 752 .

[0193] Figure 7 2 shows a structure in which one first touch electrode 260 is disposed on the first high refractive index layer 752. However, a plurality of first touch electrodes 260 may be disposed on the first high refractive index layer 752. Figure 7 The structure of the first touch electrode 260 shown is a single layer, but the first touch electrode 260 may also have a multi-layer structure of two or more layers.

[0194] The first touch electrode 260 may include an opaque or translucent conductive material.

[0195] For example, the first touch electrode 260 may include at least one of silver (Ag), aluminum (Al), magnesium (Mg), chromium (Cr), titanium (Ti), nickel (Ni), tungsten (W), gold (Au), tantalum (Ta), copper (Cu), cobalt (Co), iron (Fe), molybdenum (Mo), and platinum (Pt). In this case, the first touch electrode 260 may be disposed with respect to the reference electrode. Figure 5 The display panels 110 are depicted with the banks 534 overlapping.

[0196] As another example, the first touch electrode 260 may include a transparent conductive material, and may include at least one transparent conductive oxide, such as indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium-doped zinc oxide (GZO), zinc tin oxide (ZTO), gallium tin oxide (GTO), and fluorine-doped tin oxide (FTO).

[0197] The second low refractive index layer 653 may be disposed on the first high refractive index layer 752 and the first touch electrode 260 .

[0198] The refractive index of the second low-refractive-index layer 653 may be 1.4 to 1.5, but the refractive index of the second low-refractive-index layer 653 of the present disclosure is not limited thereto.

[0199] The second low-refractive-index layer 653 may include an organic insulating material. For example, the second low-refractive-index layer 653 may include an acrylic organic insulating material (e.g., photo acrylic), or may include at least one of polystyrene, polymethyl methacrylate (PMMA), polyacrylonitrile (PAN), polyamide (PA), polyimide (PI), polyarylene ether (PAE), heterocyclic polymer, parylene, epoxy resin, benzocyclobutene (BCB), siloxane-based resin, and silane-based resin.

[0200] The second touch electrode 270 overlapping the first touch electrode 260 may be disposed on the second low refractive index layer 653 . Figure 7 1 shows a structure in which one second touch electrode 270 is provided on the second low refractive index layer 653, however, a plurality of second touch electrodes 270 may be provided on the second low refractive index layer 653. Figure 7 The second touch electrode 270 is shown to have a single-layer structure, but the second touch electrode 270 may have a multi-layer structure of two or more layers.

[0201] The second touch electrode 270 may overlap with the first touch electrode 260. For example, one end of the second touch electrode 270 may overlap with one end of the first touch electrode 260, and the other end of the second touch electrode 270 may overlap with the other end of the first touch electrode 260. With this structure, degradation of image quality and / or degradation of touch sensitivity due to touch noise or the like can be prevented.

[0202] The second touch electrode 270 may include an opaque or semi-transparent conductive material.

[0203] For example, the second touch electrode 270 may include at least one metal selected from the group consisting of silver (Ag), aluminum (Al), magnesium (Mg), chromium (Cr), titanium (Ti), nickel (Ni), tungsten (W), gold (Au), tantalum (Ta), copper (Cu), cobalt (Co), iron (Fe), molybdenum (Mo), and platinum (Pt). In this case, the second touch electrode 270 may be disposed with respect to the reference electrode. Figure 5 The banks 534 of the display panels 110 are depicted as overlapping.

[0204] As another example, the second touch electrode 270 may include a transparent conductive material, and may include at least one transparent conductive oxide, such as indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium-doped zinc oxide (GZO), zinc tin oxide (ZTO), gallium tin oxide (GTO), and fluorine-doped tin oxide (FTO).

[0205] If the first touch electrode 260 and the second touch electrode 270 include an opaque or semi-transparent conductive material, the resistance of each touch electrode may be reduced, thereby realizing a large-area touch panel 120 .

[0206] In addition, if the first touch electrode 260 and the second touch electrode 270 include a transparent conductive material, the transmittance of the touch panel 120 may be improved.

[0207] A second high refractive index layer 754 may be disposed on the second low refractive index layer 653 and the second touch electrode 270 .

[0208] The refractive index of the second high refractive index layer 754 may be 2 to 2.2, but the refractive index of the second high refractive index layer 754 is not limited thereto.

[0209] Here, the second high refractive index layer 754 may include an inorganic insulating material. For example, the second high refractive index layer 754 may include any one of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON). However, the material of the second high refractive index layer 754 according to the present disclosure is not limited thereto.

[0210] A third low refractive index layer 755 may be disposed on the second high refractive index layer 754 .

[0211] The refractive index of the third low-refractive-index layer 755 may be 1.4 to 1.5, however the refractive index of the third low-refractive-index layer 755 according to the present disclosure is not limited thereto.

[0212] The third low-refractive-index layer 755 may include an organic insulating material. For example, the third low-refractive-index layer 755 may include an acrylic organic insulating material (e.g., photo acrylic), polystyrene, or may include at least one of polymethyl methacrylate (PMMA), polyacrylonitrile (PAN), polyamide (PA), polyimide (PI), polyarylether (PAE), heterocyclic polymer, parylene, epoxy resin, benzocyclobutene (BCB), siloxane-based resin, and silane-based resin.

[0213] At the same time, if Figure 7 As shown, the second low refractive index layer 653 may include at least one first hole 660 .

[0214] The first hole 660 may not overlap with the first touch electrode 260 and the second touch electrode 270. If the first touch electrode 260 and the second touch electrode 270 overlap with at least a portion of the first hole 660, a step may occur in at least one of the first touch electrode 260 and the second touch electrode 270, thereby generating touch noise, for example, reduced touch sensitivity.

[0215] The first hole 660 may be provided to expose a portion of the lower surface of the second high refractive index layer 754 .

[0216] The first high refractive index layer 752 and the first low refractive index layer 751 may be disposed in the first hole 660 of the second low refractive index layer 653 .

[0217] In addition, the first high refractive index layer 752 may be in contact with a portion of the lower surface of the second high refractive index layer 754 exposed by the first hole 660 in the second low refractive index layer 653 .

[0218] In other words, in the region where the first hole 660 of the second low refractive index layer 653 is provided, the first high refractive index layer 752 and the second high refractive index layer 754 having a higher refractive index than the first to third low refractive index layers 751, 653 and 755 may be sequentially stacked.

[0219] Accordingly, the thickness H1 of the high refractive index layer may be greater in the region where the first hole 660 of the second low refractive index layer 653 is provided, compared to the region where the first hole 660 of the second low refractive index layer 653 is not provided.

[0220] In particular, in the region where the first hole 660 of the second low refractive index layer 653 is provided, the thickness of the high refractive index layers in contact with each other may correspond to the sum of the thickness H2 of the first high refractive index layer 752 and the thickness H3 of the second high refractive index layer 754. On the other hand, in the region where the first hole 660 of the second low refractive index layer 653 is not provided, the first high refractive index layer 752 and the second high refractive index layer 754 are separated from each other by the second low refractive index layer 653 therebetween and therefore are not provided in contact with each other.

[0221] Meanwhile, although not shown in the figure, the touch panel 120 can be manufactured by forming a third low-refractive-index layer 755 on a substrate, forming a second high-refractive-index layer 754 on the third low-refractive-index layer 755, forming a plurality of second touch electrodes 270 on the second high-refractive-index layer 754, and forming a second low-refractive-index layer 653 including at least one first hole 660 on the substrate having the plurality of second touch electrodes 270 formed thereon. Subsequently, a plurality of first touch electrodes 260 are formed on the second low-refractive-index layer 653 including at least one first hole 660, and sequentially forming a first high-refractive-index layer 752 and a first low-refractive-index layer 751 on the substrate having the first touch electrodes 260 formed thereon, thereby forming the touch panel 120.

[0222] Thereafter, the substrate disposed on one surface of the third low refractive index layer 755 may be removed, and the first low refractive index layer 751 may be attached to one surface of the display panel 110 , thereby forming the touch display device 100 .

[0223] Accordingly, the first hole 660 of the second low refractive index layer 653 may be configured to expose a portion of the lower surface of the second high refractive index layer 754 of the touch display device 100 , and the first high refractive index layer 752 and the first low refractive index layer 751 disposed below the second low refractive index layer 653 may be disposed in the first hole 660 .

[0224] As described above, the touch panel 120 according to an embodiment of the present disclosure includes the first hole 660 in the second low refractive index layer 653 , and at least two high refractive index layers (first and second high refractive index layers) can contact each other through the first hole 660 , thereby preventing external light L1 from deteriorating side visibility.

[0225] Specifically, a portion of the external light L1 may pass through the third low refractive index layer 755 of the touch display device 100 and be incident on the second high refractive index layer 754 and the first high refractive index layer 752 provided in the first hole 660 of the second low refractive index layer 653 .

[0226] Due to the difference in refractive index between the third low refractive index layer 755 and the second high refractive index layer 754, the external light L1 incident on the first hole 660 of the second low refractive index layer 653 may be refracted and incident on the second high refractive index layer 754. In this case, the incident angle of the external light L1 incident on the second high refractive index layer 754 may be smaller than the incident angle of the external light L1 incident on the third low refractive index layer 755.

[0227] The external light L1 may sequentially pass through the second high refractive index layer 754 and the first high refractive index layer 752 in the first hole 660. Here, since the refractive index of each of the second high refractive index layer 754 and the first high refractive index layer 752 corresponds to or is similar to each other, when the external light L1 is incident from the second high refractive index layer 754 to the first high refractive index layer 752, little refraction occurs.

[0228] In addition, the external light L1 may pass through the first high refractive index layer 752 and then be incident on the first low refractive index layer 751. In this case, due to the difference in refractive index between the first high refractive index layer 752 and the first low refractive index layer 751, the external light L1 may be refracted at the interface between the first high refractive index layer 752 and the first low refractive index layer 751 and then be incident on the first low refractive index layer 751. In this case, the incident angle of the external light L1 incident on the first low refractive index layer 751 may be greater than the incident angle of the external light L1 incident on the first high refractive index layer 752.

[0229] Thereafter, the external light L1 may pass through the first low refractive index layer 751 to reach the display panel 110. In addition, the external light L1 may be reflected by a plurality of electrodes and a plurality of wirings included in the display panel 110 and be incident on the first low refractive index layer 751 again.

[0230] The external light L1 may pass through the first low refractive index layer 751 and reach the first high refractive index layer 752. In this case, due to the difference in refractive index between the first low refractive index layer 751 and the first high refractive index layer 752, the external light L1 may be totally reflected at the interface between the first low refractive index layer 751 and the first high refractive index layer 752. In particular, the external light L1 incident on the first high refractive index layer 752 may be incident at an angle greater than a critical angle for total reflection and may be totally reflected at the interface between the first high refractive index layer 752 and the first low refractive index layer 751.

[0231] External light L1 totally reflected on the interface between the first high refractive index layer 752 and the first low refractive index layer 751 may reach the display panel 110 , and may be re-reflected by electrodes and wirings of the display panel 110 and incident on the first low refractive index layer 751 again.

[0232] As described above, since the external light L1 passing through the first high refractive index layer 752 and the second high refractive index layer 754 provided in the first hole 660 of the second low refractive index layer 653 is trapped in the touch panel 120 and is not emitted to the outside, the stain generated by the external light L1 is not visually recognized by the user.

[0233] On the other hand, among the external light incident on the touch display device 100, most of the external light L2 that does not pass through the first hole 660 in the second low refractive index layer 653 will pass through the third low refractive index layer 755, the second high refractive index layer 754 and the second low refractive index layer 653 in sequence, and will be reflected at the interface between the second low refractive index layer 653 and the first high refractive index layer 752, thereby being emitted to the outside of the touch panel 120.

[0234] In particular, since components with different refractive indices are arranged alternately, the external light L2 passing through each component will be incident on at least one component (for example, the first high refractive index layer 752) at an incident angle greater than the critical angle of total reflection, and the external light L2 will be totally reflected and emitted to the outside of the touch panel 120.

[0235] In addition, a portion of the external light L2 that does not pass through the first hole 660 provided in the second low refractive index layer 653 may be reflected by the display panel 110 and emitted to the outside of the touch panel 120 .

[0236] In this case, the external light L2 may be visually recognized as smudges by the user and may be a factor that reduces the visibility of the touch display device 100. In particular, since the amount of external light L2 emitted in the lateral direction of the touch panel 120 (a direction different from a direction perpendicular to the surface of the touch panel 120) increases, the side visibility of the touch display device 100 may be reduced.

[0237] However, in the embodiment of the present disclosure, the second low-refractive-index layer 653 of the touch panel 120 includes at least one first hole 660, and a first high-refractive-index layer 752 and a second high-refractive-index layer 754 having a higher refractive index than the first to third low-refractive-index layers 751, 653, and 755 are sequentially stacked in the first hole 660. Accordingly, external light L1 incident in a lateral direction of the touch panel 120 is trapped inside the touch panel 120, thereby providing an effect of improving the side visibility of the touch display device 100.

[0238] In addition, in the embodiment of the present disclosure, by using the first hole 660 provided in the second low-refractive-index layer 653, the number of times that external light L1 is refracted due to the difference in refractive index between adjacent layers can be reduced. Accordingly, even if some external light L1 passes through the first high-refractive-index layer 752 and the second high-refractive-index layer 754 provided in the first hole 660 and is emitted outside the touch panel 120, the external light L1 does not spread widely, but is instead emitted in a concentrated manner. Accordingly, the unevenness caused by the external light L1 can be minimized, thereby improving visibility.

[0239] Figure 8 is a plan view schematically showing the structure of a touch panel according to a second embodiment of the present disclosure. Figure 9 It is along Figure 8 The cross-sectional view is obtained along line CD.

[0240] In the process of describing this embodiment, the description of the same or corresponding parts in the previous embodiment will be omitted. Figure 8 and Figure 9 The touch panel 120 according to the present embodiment will be described.

[0241] refer to Figure 8 , the touch panel 120 according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0242] For example, refer to Figure 8 The first touch electrodes 260, the second touch electrodes 270, the openings 410, and the dummy patterns 480 included in the touch panel 120 of this embodiment may be the same as those in the reference Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0243] The touch panel 120 according to the present embodiment may include a plurality of insulating layers. In addition, at least one insulating layer among the plurality of insulating layers may include the second hole 860.

[0244] In particular, at least one of the plurality of insulating layers may include at least one second hole 860 disposed in a region overlapping the opening 410. Here, the second hole 860 may include a first pattern hole 861 and a second pattern hole 862 spaced apart from and surrounding the first pattern hole 861.

[0245] In addition, the second hole 860 may be provided in a region between a touch electrode intersecting with each other and another adjacent touch electrode intersecting with each other (or a region between one opening 410 and another opening 410 adjacent in the first direction).

[0246] Here, each of the first pattern holes 861 and the second pattern holes 862 may have a closed curve shape in a plan view.

[0247] If each of the first and second patterned holes 861, 862 is disposed in an area overlapping the opening 410, and the opening 410 of the first and second touch electrodes 260, 270 is in a rhombus shape, then the first and second patterned holes 861, 862 may also have a rhombus shape. In other words, the shapes of the first and second patterned holes 861, 862 may correspond to the shape of the opening 410. However, the embodiments of the present disclosure are not limited thereto, and the shapes of the first and second patterned holes 861, 862 may be modified to various shapes.

[0248] In addition, if each of the first pattern hole 861 and the second pattern hole 862 is set in the area between the intersecting touch electrodes and the adjacent other intersecting touch electrodes, then the first pattern hole 861 and the second pattern hole 862 can have a triangular shape, but the embodiments of the present disclosure are not limited to this, and the first pattern hole 861 and the second pattern hole 862 can be changed to various shapes.

[0249] Furthermore, in the touch panel 120 , the first pattern holes 861 and the second pattern holes 862 may have different shapes depending on positions of the first pattern holes 861 and the second pattern holes 862 .

[0250] The second holes 860 including the first and second pattern holes 861 and 862 may not overlap with the first and second touch electrodes 260 and 270 .

[0251] If the second hole 860 overlaps with the first touch electrode 260 and / or the second touch electrode 270, the first touch electrode 260 and / or the second touch electrode 270 may be exposed to the outside, or the first touch electrode 260 and / or the second touch electrode 270 may not be formed on a flat surface, thereby reducing touch reliability.

[0252] Although not shown in the figure, if Figure 2The first touch electrodes and the second touch electrodes are arranged in a grid type as in the structure in FIG. 1 , then the second hole 860 of the insulating layer can be set at Figure 2 The opening OP overlaps in the area.

[0253] At the same time, Figure 8 , the second hole 860 is mainly described as having a structure including a first pattern hole 861 and a second pattern hole 862, but the embodiments of the present disclosure are not limited thereto. However, the second hole 860 may be a structure including one or three or more holes.

[0254] In particular, refer to Figure 9 , the touch panel 120 may be disposed on the display panel 110 .

[0255] The touch panel 120 may include first to third low refractive index layers 751, 953, and 755 and first and second high refractive index layers 852 and 754. Here, the refractive indexes of the first to third low refractive index layers 751, 953, and 755 may be lower than those of the first and second high refractive index layers 852 and 754.

[0256] The first low refractive index layer 751 of the touch panel 120 may be disposed on the display panel 110 , and the first high refractive index layer 852 may be disposed on the first low refractive index layer 751 .

[0257] The first high refractive index layer 852 may include at least one second hole 860. Here, the second hole 860 may include a first pattern hole 861 and a second pattern hole 862 spaced apart from each other.

[0258] The first touch electrode 260 may be disposed on the first high refractive index layer 852 .

[0259] The first touch electrode 260 may not overlap with the first pattern holes 861 and the second pattern holes 862 .

[0260] A second low refractive index layer 953 may be disposed on the first high refractive index layer 852 where the first touch electrode 260 is disposed.

[0261] The second touch electrode 270 may be disposed on the second low refractive index layer 953 .

[0262] A second high refractive index layer 754 and a third low refractive index layer 755 may be sequentially disposed on the second low refractive index layer 953 where the second touch electrode 270 is disposed.

[0263] Meanwhile, each of the first and second pattern holes 861, 862 of the first high refractive index layer 852 may be disposed to expose a portion of the lower surface of the second low refractive index layer 953. In addition, the first low refractive index layer 751 may be disposed in the first and second pattern holes 861, 862.

[0264] In other words, the first low refractive index layer 751 may contact a portion of the lower surface of the second low refractive index layer 953 through the first and second pattern holes 861 and 862 .

[0265] Accordingly, in the area where the first pattern holes 861 and the second pattern holes 862 of the first high refractive index layer 852 are provided, the first low refractive index layer 751 and the second low refractive index layer 953 having a lower refractive index than the first high refractive index layer 852 and having a refractive index similar to or the same as each other can be stacked sequentially.

[0266] Accordingly, the thickness H4 of the low refractive index layer in the region where the second hole 860 of the first high refractive index layer 852 is provided may be greater than the thicknesses H5 and H6 of the low refractive index layer in the region where the second hole 860 of the first high refractive index layer 852 is not provided.

[0267] Meanwhile, although not shown in the figure, the touch panel 120 may be formed in the following manner: forming a third low refractive index layer 755 on a substrate, forming a second high refractive index layer 754 on the third low refractive index layer 755, forming a plurality of second touch electrodes 270 on the second high refractive index layer 754, forming a second low refractive index layer 953 on the substrate on which the plurality of second touch electrodes 270 are formed, forming a plurality of first touch electrodes 260 on the second low refractive index layer 953, forming a first high refractive index layer 852 including at least one second hole 860 on the substrate on which the first touch electrodes 260 are formed, and then forming a first low refractive index layer 751 on the first high refractive index layer 852.

[0268] Thereafter, the substrate disposed on one surface of the third low refractive index layer 755 may be removed, and the first low refractive index layer 751 may be attached to one surface of the display panel 110 to form the touch display device 100 .

[0269] Accordingly, the second hole 860 of the first high refractive index layer 852 may be configured to expose a portion of the lower surface of the second low refractive index layer 953 disposed on the first high refractive index layer 852 , and the first low refractive index layer 751 disposed under the first high refractive index layer 852 may be disposed in the second hole 860 .

[0270] As described above, the touch panel 120 according to an embodiment of the present disclosure may include a second hole 860 in the first high refractive index layer 852, wherein at least two low refractive index layers (e.g., the first and second low refractive index layers) may contact each other through the second hole 860, thereby preventing external light L3 from causing a reduction in side visibility.

[0271] In particular, a portion of the external light L3 passes through the third low refractive index layer 755 of the touch display device 100 , and may sequentially pass through the second high refractive index layer 754 and the second low refractive index layer 953 .

[0272] The external light L3 passing through the second low refractive index layer 953 may be incident on the first low refractive index layer 751 provided in the second hole 860 of the first high refractive index layer 852. Here, since the refractive indices of the second low refractive index layer 953 and the first low refractive index layer 751 correspond to or are similar to each other, when the external light L3 is incident on the first low refractive index layer 751 from the second low refractive index layer 953, little refraction occurs.

[0273] As described above, light passing through the first low refractive index layer 751 may be incident on the display panel 110. In addition, the external light L3 may be reflected by the plurality of electrodes and the plurality of lines included in the display panel 110, thereby being incident on the first low refractive index layer 751 again.

[0274] External light L3 may pass through the first low refractive index layer 751 and reach the first high refractive index layer 852. However, due to the difference in refractive index between the first low refractive index layer 751 and the first high refractive index layer 852, the external light L3 may be totally reflected at the interface between the first low refractive index layer 751 and the first high refractive index layer 852. In particular, the external light L3 incident on the first high refractive index layer 852 may be incident at an angle greater than the critical angle for total reflection and may be totally reflected at the interface between the first high refractive index layer 852 and the first low refractive index layer 751.

[0275] Then, the external light L3 totally reflected at the interface between the first high refractive index layer 852 and the first low refractive index layer 751 may reach the display panel 110 and may be reflected again by the plurality of electrodes and the plurality of wirings, thereby being incident again on the first low refractive index layer 751 .

[0276] As described above, external light L3 passing through the low refractive index layer provided in the second hole 860 of the first high refractive index layer 852 is trapped in the touch panel 120 and is not emitted to the outside. As a result, the amount of external light L3 emitted to the outside of the touch display device 100 is reduced.

[0277] Furthermore, other structures for improving the visibility of the touch display device 100 may be included in the present disclosure.

[0278] Figure 10 is a plan view schematically showing the structure of a touch panel according to a third embodiment of the present disclosure. Figure 11 It is along Figure 10 The cross-sectional view is obtained along line EF.

[0279] In the process of describing this embodiment, the description of the same or corresponding parts in the previous embodiment will be omitted. Figure 10 and Figure 11 The touch panel 120 according to the present embodiment will be described.

[0280] refer to Figure 10 , the touch panel 120 according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0281] For example, refer to Figure 10 The first touch electrodes 260, the second touch electrodes 270, the openings 410, and the dummy patterns 480 included in the touch panel 120 of this embodiment may be the same as those in the reference Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0282] The touch panel 120 according to the present embodiment may include a plurality of insulating layers. In addition, among the plurality of insulating layers, at least one insulating layer may include the second hole 860 , and another insulating layer may include the third hole 1060 .

[0283] here, Figure 10 The second hole 860 can be connected to the reference Figure 8 and Figure 9 The same is described for the second hole 860 .

[0284] In a plan view, each of the second hole 860 and the third hole 1060 may have a closed curve shape.

[0285] For example, if the openings 410 of the first touch electrodes 260 and the second touch electrodes 270 are in a diamond shape, the second holes 860 and the third holes 1060 may also be in a diamond shape. In other words, the shapes of the second holes 860 and the third holes 1060 may correspond to the shape of the openings 410, but the embodiments of the present disclosure are not limited thereto, and the shapes of the second holes 860 and the third holes 1060 may be modified to different shapes.

[0286] And, as referenced Figure 8 and Figure 9 As described above, the second hole 860 may include one or more pattern holes corresponding to one opening 410 .

[0287] Here, at least one pattern hole of the second hole 860 may overlap with the third hole 1060 .

[0288] For example, if the second hole 860 has Figure 8 and Figure 9, the structure including the first pattern hole 861 and the second pattern hole 862 is shown in FIG, then the third hole 1060 can overlap with the second pattern hole 862 of the second hole 860.

[0289] However, the structure according to the embodiment of the present disclosure is not limited thereto, and the third hole 1060 may overlap with the first pattern hole 861 of the second hole 860 , or may overlap with each of the first pattern hole 861 and the second pattern hole 862 of the second hole 860 .

[0290] Although not shown in the figure, if Figure 2 If the first touch electrodes and the second touch electrodes are arranged in a grid as in the structure of FIG. 1 , the third hole 1060 may be provided at the same position as the first touch electrodes and the second touch electrodes. Figure 2 The opening OP overlaps in the area.

[0291] Each of the second hole 860 and the third hole 1060 may not overlap with the first touch electrode 260 and the second touch electrode 270 .

[0292] In particular, refer to Figure 11 , the touch panel 120 disposed on the display panel 110 may include first to third low refractive index layers 751, 953, and 755 and first and second high refractive index layers 852 and 1054. Here, the refractive indexes of the first to third low refractive index layers 751, 953, and 755 may be smaller than the refractive indexes of the first and second high refractive index layers 852 and 1054.

[0293] The first low refractive index layer 751 of the touch panel 120 may be disposed on the display panel 110 , and the first high refractive index layer 852 may be disposed on the first low refractive index layer 751 .

[0294] The first high refractive index layer 852 may include at least one second hole 860. Here, the second hole 860 may include a first pattern hole 861 and a second pattern hole 862 spaced apart from each other.

[0295] The first touch electrode 260 may be disposed on the first high refractive index layer 852 .

[0296] The first touch electrode 260 may not overlap with the first pattern holes 861 and the second pattern holes 862 .

[0297] A second low refractive index layer 953 may be disposed on the first high refractive index layer 852 where the first touch electrode 260 is disposed.

[0298] Each of the first and second pattern holes 861 and 862 of the first high refractive index layer 852 may be disposed to expose a portion of the lower surface of the second low refractive index layer 953. In addition, the first low refractive index layer 751 may be disposed in the first and second pattern holes 861 and 862.

[0299] Accordingly, in the region where the first and second pattern holes 861 and 862 of the first high refractive index layer 852 are provided, the first and second low refractive index layers 751 and 953 having a lower refractive index than the first high refractive index layer 852 may be sequentially stacked.

[0300] The second touch electrode 270 may be disposed on the second low refractive index layer 953 .

[0301] A second high refractive index layer 1054 may be disposed on the second low refractive index layer 953 where the second touch electrode 270 is disposed.

[0302] The second high refractive index layer 1054 may include at least one third hole 1060. Here, the third hole 1060 may overlap with at least one of the first pattern hole 861 and the second pattern hole 862 of the second hole 860 of the first high refractive index layer 852. Accordingly, the third hole 1060 of the second high refractive index layer 1054 may not overlap with the first touch electrode 260 and the second touch electrode 270.

[0303] A third low refractive index layer 755 may be disposed on the second high refractive index layer 1054 .

[0304] Meanwhile, the third hole 1060 of the second high refractive index layer 1054 may be provided to expose a portion of the lower surface of the third low refractive index layer 755. In addition, the second low refractive index layer 953 may be provided in the third hole 1060.

[0305] In other words, the second low refractive index layer 953 may contact a portion of the lower surface of the third low refractive index layer 755 through the third hole 1060 .

[0306] Accordingly, in the region where the third hole 1060 is provided, the second low refractive index layer 953 and the third low refractive index layer 755 having a lower refractive index than the second high refractive index layer 1054 and having refractive indices similar to or the same as each other may be sequentially stacked.

[0307] In addition, in the area where the third hole 1060 overlaps with the second hole 860, the first to third low refractive index layers 751, 953 and 755 having a lower refractive index than the first and second high refractive index layers 852 and 1054 and having a refractive index similar to or the same as each other can be stacked sequentially.

[0308] Accordingly, external light L4 incident on the region where the third hole 1060 overlaps the second hole 860 may be incident on the display panel 110 through the third low refractive index layer 755 , the second low refractive index layer 953 , and the first low refractive index layer 751 in sequence.

[0309] At this time, since the refractive index of each of the first to third low refractive index layers 751, 953 and 755 is the same or similar to each other, the external light L4 incident on the area where the third hole 1060 overlaps with the second hole 860 is hardly refracted when passing through the first to third low refractive index layers 751, 953 and 755.

[0310] The external light L4 incident on the display panel 110 may be reflected by the plurality of electrodes and the plurality of lines included in the display panel 110 , thereby being incident on the first low refractive index layer 751 again.

[0311] External light L4 can pass through the first low refractive index layer 751 to reach the first high refractive index layer 852. However, due to the difference in refractive index between the first low refractive index layer 751 and the first high refractive index layer 852, the external light L4 is totally reflected at the interface between the first low refractive index layer 751 and the first high refractive index layer 852.

[0312] Then, the external light L4 that is totally reflected at the interface between the first high refractive index layer 852 and the first low refractive index layer 751 reaches the display panel 110, and the process of the external light L4 being re-reflected by multiple electrodes and multiple lines of the display panel 110 and incident on the first low refractive index layer 751 again is repeated.

[0313] As described above, external light L4 that passes through the low refractive index layer provided in the second hole 860 of the first high refractive index layer 852 and the third hole 1060 of the second high refractive index layer 1054 is trapped in the touch panel 120 and is not emitted to the outside, and the external light L4 incident on the touch panel 120 is reflected in the touch display device 100. Accordingly, the amount of light emitted to the outside of the touch display device 100 can be reduced, thereby providing an effect of improving the visibility of the touch display device 100.

[0314] Furthermore, another structure for improving the visibility of the touch display device 100 may be included in the present disclosure.

[0315] Figure 12 is a plan view schematically showing the structure of a touch panel according to a fourth embodiment of the present disclosure. Figure 13 It is along Figure 12 A cross-sectional view taken along line GH in FIG.

[0316] In the process of describing this embodiment, the description of the same or corresponding parts in the previous embodiment will be omitted. Figure 12 and Figure 13 The touch panel 120 according to the present embodiment will be described.

[0317] refer to Figure 12, the touch panel 120 according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0318] As an example, refer to Figure 12 The first touch electrodes 260, the second touch electrodes 270, the openings 410 and the dummy patterns 480 included in the touch panel 120 of this embodiment may be the same as those in the reference Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0319] The touch panel 120 according to this embodiment may include a plurality of insulating layers. In addition, at least one of the plurality of insulating layers may include a second hole 860. The touch panel 120 may further include another insulating layer overlapping the plurality of first touch electrodes 260 and the plurality of second touch electrodes 270.

[0320] here, Figure 12 The second hole 860 can be connected to the reference Figure 8 and Figure 9 The same is described for the second hole 860 .

[0321] The insulating layer may include a region extending in the first direction. The insulating layer extending in the first direction may overlap with the plurality of first touch electrodes 260 and the plurality of second touch electrodes 270 extending in the first direction.

[0322] In addition, the insulating layer may include a region extending in the second direction. The insulating layer extending in the second direction may overlap with the plurality of first touch electrodes 260 and the plurality of second touch electrodes 270 extending in the second direction.

[0323] Furthermore, the insulating layer may be further provided to overlap with the dummy pattern 480 .

[0324] The insulating layer may include openings in regions corresponding to the openings 410 formed with the first and second touch electrodes 260 and 270 .

[0325] In addition, the insulating layer may be provided so as not to overlap with the second hole 860 .

[0326] In particular, refer to Figure 13 , the touch panel 120 disposed on the display panel 110 may include first to third low refractive index layers 751, 953, and 755 and first and second high refractive index layers 852 and 1254. Here, the refractive indexes of the first to third low refractive index layers 751, 953, and 755 may be smaller than the refractive indexes of the first and second high refractive index layers 852 and 1254.

[0327] The first low refractive index layer 751 of the touch panel 120 may be disposed on the display panel 110 , and the first high refractive index layer 852 may be disposed on the first low refractive index layer 751 .

[0328] The first high refractive index layer 852 may include at least one second hole 860. Here, the second hole 860 may include a first pattern hole 861 and a second pattern hole 862 spaced apart from each other.

[0329] The first touch electrode 260 may be disposed on the first high refractive index layer 852 .

[0330] The first touch electrode 260 may not overlap with the first pattern hole 861 and the second pattern hole 862 .

[0331] A second low refractive index layer 953 may be disposed on the first high refractive index layer 852 where the first touch electrode 260 is disposed.

[0332] Each of the first and second pattern holes 861 and 862 of the first high refractive index layer 852 may be disposed to expose a portion of the lower surface of the second low refractive index layer 953. In addition, the first low refractive index layer 751 may be disposed in the first and second pattern holes 861 and 862.

[0333] The second touch electrode 270 may be disposed on the second low refractive index layer 953 .

[0334] A second high refractive index layer 1254 ( Figure 12 insulating layer 1254).

[0335] The second high refractive index layer 1254 may overlap a portion of the second low refractive index layer 953. In addition, the second high refractive index layer 1254 may overlap the first touch electrode 260 and the second touch electrode 270, and may not overlap the second hole 860 of the first high refractive index layer 852.

[0336] The second high refractive index layer 1254 is configured to overlap with the first touch electrode 260 and the second touch electrode 270. Thus, during the manufacturing process of the touch panel 120, when the third low refractive index layer 755 is separated from the substrate, the first touch electrode 260 and the second touch electrode 270 can be prevented from being damaged by laser or the like.

[0337] A third low refractive index layer 755 may be disposed on the second high refractive index layer 1254 and the second low refractive index layer 953 .

[0338] In a region where the second high refractive index layer 1254 is not provided, a second low refractive index layer 953 and a third low refractive index layer 755 having a lower refractive index than the second high refractive index layer 1254 and having refractive indices similar to or the same as each other may be sequentially stacked.

[0339] In addition, in the area where the second high refractive index layer 1254 is not set and overlaps with the second hole 860 of the first high refractive index layer 852, the first to third low refractive index layers 751, 953 and 755 having a refractive index lower than the first and second high refractive index layers 852 and 1254 and having a refractive index similar to or the same as each other can be stacked sequentially.

[0340] Accordingly, external light L5 incident on an area where the second high refractive index layer 1254 is not provided and overlapping with the second hole 860 of the first high refractive index layer 852 can sequentially pass through the third low refractive index layer 755, the second low refractive index layer 953 and the first low refractive index layer 751 and be incident on the display panel 110.

[0341] Since the refractive index of each of the first to third low refractive index layers 751, 953 and 755 is the same or similar to each other, the external light L5 incident on the area where the second high refractive index layer 1254 is not set and the area overlapping the second hole 860 of the first high refractive index layer 852 is hardly refracted when passing through the first to third low refractive index layers 751, 953 and 755.

[0342] The external light L5 incident on the display panel 110 may be reflected, thereby being incident on the first low refractive index layer 751 again.

[0343] Then, the external light L5 may pass through the first low refractive index layer 751 to reach the first high refractive index layer 852. However, due to the difference in refractive index between the first low refractive index layer 751 and the first high refractive index layer 852, the external light L5 may be totally reflected at the interface between the first low refractive index layer 751 and the first high refractive index layer 852.

[0344] In addition, the external light L5 that is totally reflected at the interface between the first high refractive index layer 852 and the first low refractive index layer 751 may reach the display panel 110 and repeat the process of light being reflected again by the display panel 110 and incident again on the first low refractive index layer 751 .

[0345] As described above, external light L5 passing through the low refractive index layer provided in the region where the second high refractive index layer 1254 is not provided and overlaps with the second hole 860 of the first high refractive index layer 852 may be trapped in the touch panel 120 without being emitted to the outside.

[0346] In addition, the present disclosure may further include another structure for improving the visibility of the touch display device 100 .

[0347] Figure 14 is a plan view schematically showing the structure of a touch panel according to a fifth embodiment of the present disclosure. Figure 15 It is along Figure 14 A sectional view obtained along line IJ.

[0348] refer to Figure 14 , the touch panel 120 according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0349] As an example, refer to Figure 14 The first touch electrodes 260, the second touch electrodes 270, the openings 410, and the dummy patterns 480 included in the touch panel 120 of this embodiment may be the same as those in the reference Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0350] The touch panel 120 according to the present embodiment may include a plurality of insulating layers. In addition, at least one insulating layer among the plurality of insulating layers may include at least one recess 1460 .

[0351] In a plan view, the shape of the recess 1460 may be circular, but the shape of the recess 1460 according to an embodiment of the present disclosure is not limited thereto. In a plan view, the shape of the recess 1460 may be formed in various shapes, such as a polygon or an ellipse.

[0352] In particular, at least one of the plurality of insulating layers may include at least one recess 1460 disposed in a region overlapping the opening 410. If there are a plurality of recesses 1460 overlapping one opening 410, the plurality of recesses 1460 overlapping one opening 410 may be disposed to be spaced apart from each other.

[0353] In addition, the recess 1460 may also be provided in a region between a touch electrode that intersects with each other and another adjacent touch electrode that intersects with each other (or between one opening 410 and another opening 410 that are adjacent in the first direction).

[0354] In addition, the recess 1460 may not overlap with each of the first touch electrode 260 and the second touch electrode 270 .

[0355] If the recessed portion 1460 of the insulating layer overlaps with the first touch electrode 260 and / or the second touch electrode 270, the first touch electrode 260 and / or the second touch electrode 270 may be exposed to the outside, or the first touch electrode 260 and / or the second touch electrode 270 may not be formed on a flat surface, thereby reducing touch reliability.

[0356] In addition, if Figure 14 As shown, the recessed portion 1460 disposed to overlap with the opening 410 and the recessed portion 1460 not overlapping with the opening may be disposed to be spaced apart from each other.

[0357] Since the plurality of recessed portions 1460 provided in the touch panel 120 are disposed to be spaced apart from each other, there is an effect of reducing external light reflection.

[0358] In particular, refer to Figure 15 , the touch panel 120 disposed on the display panel 110 may include first to third low refractive index layers 751, 953, and 755 and first and second high refractive index layers 752 and 1454. Here, the refractive indexes of the first to third low refractive index layers 751, 953, and 755 may be smaller than the refractive indexes of the first and second high refractive index layers 752 and 1454.

[0359] The first low refractive index layer 751 of the touch panel 120 may be disposed on the display panel 110 , and the first high refractive index layer 752 may be disposed on the first low refractive index layer 751 .

[0360] The first touch electrode 260 may be disposed on the first high refractive index layer 752 .

[0361] A second low refractive index layer 953 may be disposed on the first touch electrode 260 .

[0362] The second touch electrode 270 may be disposed on the second low refractive index layer 953 to overlap with the first touch electrode 260 .

[0363] A second high refractive index layer 1454 may be disposed on the second touch electrode 270 .

[0364] The second high refractive index layer 1454 may include at least one recess 1460. The recess 1460 of the second high refractive index layer 1454 may not overlap with the first touch electrode 260 and the second touch electrode 270.

[0365] Meanwhile, when manufacturing the touch panel 120 , since at least one recess 1460 is formed in the second high refractive index layer 1454 and then the second low refractive index layer 953 is formed on the second high refractive index layer 1454 , the second low refractive index layer 953 may be disposed in the recess 1460 of the second high refractive index layer 1454 .

[0366] The recessed portion 1460 of the second high refractive index layer 1454 may focus external light L6 incident to the touch panel 120 and emit the external light L6 to the outside of the touch panel 120 , thereby minimizing the size of smudges caused by the external light L6 and preventing the smudges from being recognized.

[0367] Specifically, external light L6 may sequentially pass through the third low refractive index layer 755 , the second high refractive index layer 1454 , and the second low refractive index layer 953 of the touch panel 120 , and be totally reflected at the interface between the second low refractive index layer 953 and the first high refractive index layer 752 .

[0368] External light L6 totally reflected at the interface between the second low refractive index layer 953 and the first high refractive index layer 752 passes through the second low refractive index layer 953 and enters the second high refractive index layer 1454. In addition, some external light L6 may enter the recess 1460 of the second high refractive index layer 1454.

[0369] The external light L6 may be focused while passing through the recessed portion 1460 of the second high refractive index layer 1454 , and the focused external light L6 may pass through the third low refractive index layer 755 and be emitted to the outside of the touch panel 120 .

[0370] As described above, since external light L6 is focused by recessed portion 1460 of second high refractive index layer 1454 and emitted to the outside of touch panel 120 , the size of the stain caused by external light L6 becomes small, and as a result, the stain is not recognized by the user.

[0371] Furthermore, another structure for improving the visibility of the touch display device 100 may be included in the present disclosure.

[0372] Figure 16 is a plan view schematically showing the structure of a touch panel according to a sixth embodiment of the present disclosure. Figure 17 It is along Figure 16 A cross-sectional view taken along line KL in FIG.

[0373] refer to Figure 16 , the touch panel 120 according to an embodiment of the present disclosure may include a plurality of first touch electrodes 260 , a plurality of second touch electrodes 270 , a plurality of openings 410 , and a plurality of dummy patterns 480 .

[0374] As an example, refer to Figure 16 The first touch electrodes 260, the second touch electrodes 270, the openings 410, and the dummy patterns 480 included in the touch panel 120 of this embodiment may be the same as those in the reference Figure 4 The first touch electrodes 260 , the second touch electrodes 270 , the openings 410 , and the dummy patterns 480 described are the same.

[0375] The touch panel 120 according to the present embodiment may include a plurality of insulating layers, and the plurality of insulating layers may have a structure in which at least three or more high refractive index layers IL2 are sequentially stacked.

[0376] Thus, external light is trapped inside the touch panel 120 and is not emitted to the outside, thereby improving the visibility of the touch display device 100 .

[0377] In particular, refer to Figure 17 , the touch display device 100 may include a first low refractive index layer 751 disposed on the display panel 110 .

[0378] A first high refractive index layer 752 may be disposed on the first low refractive index layer 751 .

[0379] The first touch electrode 260 may be disposed on the first high refractive index layer 752 .

[0380] A third high refractive index layer 1656 may be disposed on the first high refractive index layer 752 where the first touch electrode 260 is disposed.

[0381] The refractive index of the third high refractive index layer 1656 may be 2 to 2.2, but the refractive index of the third high refractive index layer 1656 of the present disclosure is not limited thereto.

[0382] The third high refractive index layer 1656 may include an inorganic insulating material. For example, the third high refractive index layer 1656 may include any one of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON). However, the material of the third high refractive index layer 1656 according to the present disclosure is not limited thereto.

[0383] A second touch electrode 270 overlapping the first touch electrode 260 may be disposed on the third high refractive index layer 1656 .

[0384] A second high refractive index layer 754 may be disposed on the third high refractive index layer 1656 where the second touch electrode 270 is disposed.

[0385] A third low refractive index layer 755 may be disposed on the second high refractive index layer 754 .

[0386] In other words, the touch panel 120 according to the present embodiment may include first and third low refractive index layers 751 and 755 , and may include first to third high refractive index layers 752 , 754 and 1656 disposed between the first and third low refractive index layers 751 and 755 .

[0387] In addition, in areas where the first touch electrode 260 and the second touch electrode 270 are not provided, the high refractive index layers may be sequentially arranged in the order of the first high refractive index layer 752, the third high refractive index layer 1656, and the second high refractive index layer 754. In particular, a portion of the upper surface of the first high refractive index layer 752 may be in contact with a portion of the rear surface of the third high refractive index layer 1656, and a portion of the upper surface of the third high refractive index layer 1656 may be in contact with a portion of the rear surface of the second high refractive index layer 754.

[0388] Here, the refractive indexes of the first and third low refractive index layers 751 and 755 may be lower than the refractive indexes of the first to third high refractive index layers 752 , 754 , and 1656 .

[0389] Accordingly, external light L7 incident on the touch panel 120 may pass through the third low refractive index layer 755 , and be refracted and incident on the second high refractive index layer 754 .

[0390] The external light L7 may pass through the third high refractive index layer 1566 having a refractive index similar to or the same as that of the second high refractive index layer 754 and the first high refractive index layer 752 , and be refracted and incident on the first low refractive index layer 751 .

[0391] Thereafter, the external light L7 may pass through the first low refractive index layer 751 and be incident on the display panel 110 , and then be reflected by components of the display panel 110 and be incident on the first low refractive index layer 751 again.

[0392] External light L7 may pass through the first low refractive index layer 751 to reach the first high refractive index layer 752. Due to the difference in refractive index between the first low refractive index layer 751 and the first high refractive index layer 752, the external light L7 may be totally reflected at the interface between the first low refractive index layer 751 and the first high refractive index layer 752.

[0393] Then, the external light L7 totally reflected at the interface between the first high refractive index layer 752 and the first low refractive index layer 751 reaches the display panel 110 and repeats the process of being reflected back by the display panel 110 and incident on the first low refractive index layer 751 again.

[0394] As described above, external light L7 passing through the region where the first to third high refractive index layers 752 , 754 , and 1656 are sequentially stacked may be trapped in the touch panel 120 and not emitted to the outside of the touch panel 120 , thereby reducing external light reflection.

[0395] The above description is proposed to enable those skilled in the art to implement and use the technical ideas of the present invention, and is provided in the context of specific applications and needs. Various modifications, supplements and replacements for the described embodiments will be apparent to those skilled in the art without departing from the essence and scope of the present invention, and the general principles defined herein may also be applied to other embodiments and applications. The above description and accompanying drawings provide examples of the technical ideas of the present invention for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical ideas of the present invention. Therefore, the scope of the present invention is not limited to the embodiments shown, but is consistent with the widest scope consistent with the claims. The scope of protection of the present invention should be interpreted based on the appended claims, and all technical ideas within their equivalent scope should be interpreted as being included within the scope of the present invention.

Claims

1. A touch display device, comprising: Display panel; a first insulating layer disposed on the display panel; a plurality of first touch electrodes provided on the first insulating layer; a second insulating layer provided on the first touch electrode; a plurality of second touch electrodes provided on the second insulating layer; as well as a third insulating layer provided on the second touch electrode, The first touch electrode and the second touch electrode overlap with each other, wherein at least one of the first insulating layer, the second insulating layer and the third insulating layer comprises multiple layers having different refractive indices, The first insulating layer, the second insulating layer and the third insulating layer are composed of a plurality of low refractive index layers and a plurality of high refractive index layers, and the refractive index of each low refractive index layer is smaller than the refractive index of each high refractive index layer. At least two of the plurality of low refractive index layers or at least two of the plurality of high refractive index layers are continuously disposed in a region where the plurality of first touch electrodes and the plurality of second touch electrodes are not disposed.

2. The touch display device according to claim 1 , wherein the first insulating layer comprises a first low refractive index layer provided on the display panel and a first high refractive index layer provided on the first low refractive index layer. The refractive index of the first low-refractive-index layer is smaller than the refractive index of the first high-refractive-index layer.

3. The touch display device according to claim 2 , wherein the second insulating layer comprises a second low refractive index layer provided on the plurality of first touch electrodes, wherein the third insulating layer includes a second high refractive index layer disposed on the plurality of second touch electrodes and a third low refractive index layer disposed on the second high refractive index layer, The refractive index of the second low refractive index layer and the third low refractive index layer is smaller than the refractive index of the first high refractive index layer and the second high refractive index layer.

4. The touch display device of claim 3 , wherein the second low refractive index layer includes at least one first hole provided in a region that does not overlap with each of the plurality of first touch electrodes and the plurality of second touch electrodes, the first hole exposing a portion of a lower surface of the second high refractive index layer. The first high refractive index layer and the second high refractive index layer are in contact with each other through the first hole.

5. The touch display device of claim 3 , wherein the first high refractive index layer includes at least one second hole provided in a region not overlapping with each of the plurality of first touch electrodes and the plurality of second touch electrodes, the second hole exposing a portion of a lower surface of the second low refractive index layer. The first low-refractive-index layer and the second low-refractive-index layer are in contact with each other through the second hole. 6 . The touch display device of claim 5 , wherein the second holes include a first pattern hole and a second pattern hole spaced apart from the first pattern hole and surrounding the first pattern hole. 7 . The touch display device of claim 6 , wherein each of the first pattern holes and the second pattern holes has a closed curve shape.

8. The touch display device of claim 5 , wherein the second high refractive index layer includes at least one third hole overlapping with the second hole, the third hole exposing a portion of the lower surface of the third low refractive index layer, and the second low refractive index layer and the third low refractive index layer are in contact with each other through the third hole. 9 . The touch display device of claim 8 , wherein a shape of the third hole corresponds to a shape of the second hole overlapping with the third hole. 10 . The touch display device according to claim 5 , wherein the second high refractive index layer is disposed so as not to overlap with the second hole of the first high refractive index layer. 11 . The touch display device of claim 10 , wherein the second high refractive index layer has a shape corresponding to the plurality of first touch electrodes and the plurality of second touch electrodes. 12 . The touch display device of claim 3 , wherein the second high refractive index layer comprises at least one recessed portion provided in a region not overlapping with each of the plurality of first touch electrodes and the plurality of second touch electrodes.

13. The touch display device according to claim 2 , wherein the second insulating layer comprises a second high refractive index layer disposed on the plurality of first touch electrodes, and the third insulating layer comprises a third high refractive index layer disposed on the plurality of second touch electrodes and a second low refractive index layer disposed on the third high refractive index layer. The refractive index of the second low refractive index layer is smaller than the refractive indexes of the first high refractive index layer, the second high refractive index layer and the third high refractive index layer. 14 . The touch display device according to claim 13 , wherein a portion of the first high refractive index layer and a portion of the second high refractive index layer are in contact with each other, and a portion of the second high refractive index layer and a portion of the third high refractive index layer are in contact with each other. 15 . The touch display device according to claim 1 , wherein the plurality of high refractive index layers comprise an inorganic insulating material, and the plurality of low refractive index layers comprise an organic insulating material.

16. A touch panel comprising: a first low refractive index layer; a first high refractive index layer disposed on the first low refractive index layer; a plurality of first touch electrodes disposed on the first high refractive index layer; a second high refractive index layer disposed on the first touch electrode; a plurality of second touch electrodes disposed on the second high refractive index layer; a third high refractive index layer disposed on the second touch electrode; as well as A second low refractive index layer is provided on the third high refractive index layer, The first touch electrode and the second touch electrode overlap with each other, The refractive indexes of the first low refractive index layer and the second low refractive index layer are smaller than the refractive indexes of the first high refractive index layer, the second high refractive index layer and the third high refractive index layer, The first high refractive index layer, the second high refractive index layer, and the third high refractive index layer are continuously disposed in a region where the plurality of first touch electrodes and the plurality of second touch electrodes are not disposed. 17 . The touch panel of claim 16 , wherein a portion of the first high refractive index layer and a portion of the second high refractive index layer are in contact with each other, and a portion of the second high refractive index layer and a portion of the third high refractive index layer are in contact with each other. 18 . The touch panel of claim 16 , wherein each of the first, second, and third high refractive index layers comprises an inorganic insulating material, and each of the first and second low refractive index layers comprises an organic insulating material.

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