Display panel and display device

Abstract

Embodiments of the present disclosure relate to a display panel and a display apparatus, and more particularly, a display panel and a display apparatus in which a nanostructure is provided and the nanostructure, a first conversion portion, and a third conversion portion of a color filter are positioned to overlap each other in a non-emission area, thereby reducing external light reflection, and a black matrix patterning process can be omitted due to the absence of a black matrix.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2020-0187180, filed on December 30, 2020, which is incorporated herein by reference for all purposes, as if fully set forth herein. Technical Field

[0003] This disclosure relates to a display panel and a display device. Background Technology

[0004] The development of the information society has led to an increased demand for various types of display devices, and in recent years, various display devices such as liquid crystal displays, plasma displays, and organic light-emitting diode displays have been utilized.

[0005] Among these display devices, there is a touch display device that provides a touch-based input method, enabling users to easily, intuitively, and conveniently input information or commands, rather than traditional input methods such as buttons, keyboards, or mice. The touch display device may include touch electrodes for sensing touch input to provide a touch-based input method.

[0006] Touch display devices need to provide excellent display quality while offering touch-based input methods. One issue with display quality in touch display devices is reduced visibility due to external light reflection. External light reflection can occur, for example, in the touch electrodes used to sense touch input.

[0007] To reduce external light reflection, display devices may include polarizing plates. However, when using polarizing plates in display devices, the plates are expensive, and the arrangement of the polarizing plates may limit product design. Summary of the Invention

[0008] Embodiments of this disclosure may provide a display panel and display device capable of reducing external light reflection.

[0009] Embodiments of this disclosure can provide a display panel and display device that can reduce external light reflection even without a polarizing plate.

[0010] On one hand, embodiments of this disclosure may provide a display panel including a substrate, an encapsulation layer positioned on the substrate, a touch electrode positioned on the encapsulation layer, a nanostructure positioned on the touch electrode, a first insulating layer positioned on the nanostructure, and a color filter positioned on the first insulating layer.

[0011] The substrate defines a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel includes a first light-emitting region that emits light of a first color, the second sub-pixel includes a second light-emitting region that emits light of a second color, and the third sub-pixel includes a third light-emitting region that emits light of a third color.

[0012] The substrate includes non-light-emitting areas positioned around the first light-emitting area, the second light-emitting area, and the third light-emitting area.

[0013] The touch electrode may include a first metal layer.

[0014] The nanostructure can be in direct contact with the first metal layer.

[0015] The color filter may include a first conversion portion positioned on the first insulating layer and corresponding to a first sub-pixel, a second conversion portion positioned on the first insulating layer and corresponding to a second sub-pixel, and a third conversion portion positioned on the first insulating layer and corresponding to a third sub-pixel.

[0016] The nanostructure, the first conversion portion, and the third conversion portion can be positioned to overlap each other in the non-luminescent region.

[0017] The touch electrode may also include a second metal layer. The second metal layer may include a metal different from the metal of the first metal layer, and the first metal layer may be positioned on the second metal layer.

[0018] The touch electrode may also include a third metal layer, and the second metal layer may be disposed on the third metal layer.

[0019] The third metal layer may include a metal different from the metal of the first metal layer.

[0020] The first metal layer and the third metal layer may contain the same metal.

[0021] The nanostructure may include a conical patterned layer in direct contact with the first metal layer and a semi-circular patterned layer positioned on the conical patterned layer.

[0022] The semi-circular patterned layer can be made of a different material than the conical patterned layer.

[0023] The conical patterned layer can be made of a material different from that of the first metal layer.

[0024] The conical pattern layer can be made of inorganic insulators.

[0025] The conical patterned layer can be made of inorganic insulators, the semi-circular patterned layer can be made of metal oxides, and the semi-circular patterned layer can be in direct contact with the conical patterned layer.

[0026] The first metal layer and the conical pattern layer can be made of the same material, and the semi-circular pattern layer can be in direct contact with the conical pattern layer.

[0027] Nanostructures can include multiple irregularly formed parts.

[0028] Multiple irregularly formed parts can be composed of inorganic insulators.

[0029] In another aspect, embodiments of this disclosure may provide a display device including a display panel and a control unit for controlling the display panel.

[0030] According to embodiments of this disclosure, a display panel and display device capable of reducing external light reflection can be provided.

[0031] According to embodiments of the present disclosure, a display panel and display device may be provided, wherein a nanostructure is provided, and the nanostructure, a first conversion portion and a third conversion portion of a color filter are positioned to overlap each other in a non-light-emitting area, thereby reducing external light reflection. Attached Figure Description

[0032] This application will be more fully understood from the following detailed description and accompanying drawings, which are given by way of illustration only and are not intended to limit the invention.

[0033] Figure 1 and Figure 2 A display device according to an embodiment of the present disclosure is shown schematically.

[0034] Figure 3 The display panel and touch panel of a display device according to an embodiment of the present disclosure are shown.

[0035] Figure 4 and Figure 5 An example of a subpixel structure of a display panel according to an embodiment of the present disclosure is shown.

[0036] Figure 6 The correspondence between the area of ​​the grid-type touch electrode and the sub-pixel area of ​​the display device according to an embodiment of the present disclosure is shown.

[0037] Figure 7 and Figure 8 This is a schematic cross-sectional view of a display panel according to a comparative example of the present disclosure.

[0038] Figure 9 This is a schematic diagram of a plan view of a display device according to a comparative example of the present disclosure.

[0039] Figure 10 and Figure 11This is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present disclosure.

[0040] Figure 12 The nanostructure of a display device according to an embodiment of the present disclosure is shown.

[0041] Figure 13 This is a schematic diagram showing a plan of a display device according to an exemplary embodiment of the present disclosure.

[0042] Figures 14 to 19 This is a diagram illustrating a method for manufacturing a display device according to an embodiment of the present disclosure.

[0043] Figure 20 and Figure 21 These are micrographs of nanostructures according to embodiments of the present disclosure.

[0044] Figures 22 to 30 This is a diagram illustrating a method for manufacturing a display device according to an embodiment of the present disclosure.

[0045] Figure 31 These are micrographs of nanostructures according to embodiments of the present disclosure.

[0046] Figures 32 to 34 This is a diagram illustrating a method for manufacturing a display device according to an embodiment of the present disclosure. Detailed Implementation

[0047] In the following description of examples or embodiments of this disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that may be implemented are illustrated by way of illustration, and in which the same reference numerals may be used to denote the same or similar components, even if they are shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, detailed descriptions of well-known functions and components incorporated herein are omitted where it is determined that the description may make the subject matter of some embodiments of this disclosure considerably unclear. Terms such as “comprising,” “having,” “including,” “constituting,” “forming,” and “formed from” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” As used herein, singular forms are intended to include plural forms unless the context clearly indicates otherwise.

[0048] The elements of this disclosure may be described herein using terms such as “first,” “second,” “A,” “B,” “(A),” or “(B).” Each of these terms is not used to define the nature, order, sequence, or number of the elements, but only to distinguish the corresponding element from the others.

[0049] When referring to a first element being "connected or coupled to" a second element, "contacting or overlapping" a second element, etc., it should be interpreted that the first element can not only be "directly connected or coupled to" or "directly contact or overlap" a second element, but also can be "inserted" between the first and second elements, or the first and second elements can be "connected or coupled," "contacting or overlapping," etc., with each other via a fourth element. Here, the second element can be included in at least one of two or more elements that are "connected or coupled," "contacting or overlapping," etc., with each other.

[0050] When time-related terms such as “after,” “following,” “next,” or “before” are used to describe a process or operation of an element or configuration, or a flow or step in an operation, processing, or manufacturing method, these terms may be used to describe a non-continuous or discontinuous process or operation, unless the terms “directly” or “immediately” are used together.

[0051] Furthermore, when referring to any size, relative dimensions, etc., the numerical or corresponding information of the component or feature (e.g., level, range, etc.) should be considered, including tolerances or error ranges, which can be caused by various factors (e.g., process factors, internal or external influences, noise, etc.) even if no specific description is specified. Additionally, the term "can" fully encompasses all the meanings of the term "able to".

[0052] Figure 1 This is a structural diagram illustrating an embodiment of the display device according to the present disclosure.

[0053] Reference Figure 1 The display device 10 according to the embodiments of the present disclosure may include: a display panel 100, which includes an active region A / A and an active region N / A; a gate drive circuit GDC; a data drive circuit DDC; and a controller CTR as a control unit.

[0054] In the display panel 100, multiple gate lines GL and multiple data lines DL are provided, and sub-pixels SP can be provided in the area where the gate lines GL and data lines DL intersect. Furthermore, the display panel 100 can be a liquid crystal panel. The liquid crystal panel may include pixel electrodes, a common electrode, and a liquid crystal layer disposed between the pixel electrodes and the common electrode. The liquid crystal layer can display images by deforming the molecular arrangement in response to a voltage applied to the pixel electrodes and the common electrode to block or transmit light.

[0055] The gate drive circuit GDC is controlled by the controller CTR and can sequentially output scan signals to multiple gate lines GL disposed on the display panel 100 to control the driving timing of multiple sub-pixels SP.

[0056] The data drive circuit (DDC) receives image data from the controller (CTR) and converts it into analog data voltage. The DDC outputs data voltage to each data line (DL) according to the timing of the scan signal applied through the gate line (GL), enabling each sub-pixel (SP) to display brightness based on the image data.

[0057] The controller CTR can provide various control signals to the gate drive circuit GDC and the data drive circuit DDC, and can control the operation of the gate drive circuit GDC and the data drive circuit DDC.

[0058] The display device 10 may also include a power management integrated circuit for providing various voltages or currents to the display panel 100, gate drive circuit (GDC), data drive circuit (DDC), etc., or for controlling various voltages or currents to be provided.

[0059] The display device 10 according to this embodiment may be an organic light-emitting display device, a liquid crystal display device, a plasma display device, etc.

[0060] In the case where the display device 10 according to this embodiment is an organic light-emitting display device, each sub-pixel SP arranged on the display panel 100 may include an organic light-emitting diode (OLED) as a self-emissive element and circuit elements such as a driving transistor for driving the organic light-emitting diode.

[0061] The type and number of circuit elements constituting each sub-pixel SP can be determined based on the provided functions and design methods.

[0062] Figure 2 A display device according to an embodiment of the present disclosure is shown schematically.

[0063] Reference Figure 2 The display device 10 according to the embodiment can provide an image display function for displaying images and a touch sensing function for sensing the user's touch.

[0064] The display device 10 according to the embodiment may include: a display panel 100 for displaying images and having data lines and gate lines disposed thereon, and a display driving circuit 101 for driving the display panel 100.

[0065] The display driving circuit 101 may functionally include a data driving circuit for driving data lines, a gate driving circuit for driving gate lines, and a controller for controlling the gate driving circuit and the data driving circuit.

[0066] The display driver circuit 101 can be implemented using one or more integrated circuits.

[0067] The display device 10 according to the embodiment may include: a touch panel TSP for touch sensing, having a plurality of touch electrodes TE as touch sensors, and having a plurality of touch lines TL electrically connected to all or part of the plurality of touch electrodes TE; and a touch circuit 102 for sensing the presence or location of a touch by driving the touch panel TSP.

[0068] The touch circuit 102 can provide touch drive signals to the touch panel TSP to drive the touch panel TSP, detect touch sensing signals from the touch panel TSP, and sense whether there is a touch and / or touch position (touch coordinates).

[0069] The touch circuit 102 can be implemented as one or more components (e.g., integrated circuits) and can be implemented separately from the display driver circuit 101.

[0070] Alternatively, all or part of the touch circuit 102 can be implemented by integration with the display driver circuit 101 or its internal circuitry. For example, the touch driver circuit of the touch circuit 102 can be implemented as an integrated circuit together with the data driver circuit of the display driver circuit 101.

[0071] Meanwhile, the display device 10 according to the embodiment can sense touch based on the capacitance formed in the touch electrode TE.

[0072] Furthermore, the display panel 100 of the display device 10 according to the embodiment can be of various types, such as an organic light-emitting diode panel (OLED panel), a liquid crystal display panel (LCD panel), etc. In the following description, for ease of explanation, an organic light-emitting diode panel (OLED panel) will be used as an example.

[0073] Reference Figure 3 The display panel 100 includes an active area A / A for displaying images and a non-active area N / A, which is an area other than the active area A / A. Here, the active area A / A is also referred to as the display area, and the non-active area N / A is also referred to as the non-display area.

[0074] Multiple sub-pixels, defined by data lines and gate lines, can be arranged in the active region A / A.

[0075] In the non-active region A / A, lines and pads may be provided for connecting the data lines, gate lines and various signal lines in the active region A / A to the display driver circuit 101.

[0076] Multiple touch electrodes (TE) and multiple touch lines (TL) can be set on the touch panel (TSP).

[0077] Multiple touch electrodes TE can be positioned to correspond to the active areas A / A of the display panel 100.

[0078] Multiple touch lines TL can be positioned to correspond to the non-active areas N / A of the display panel 100.

[0079] In other words, multiple touch lines TL can be set outside the touch electrode area (active area A / A or corresponding area) where multiple touch electrodes TE are provided.

[0080] The touch panel TSP can be built into the display panel 100 or external to the display panel 100.

[0081] As described above, the touch electrode TE is disposed in the active area A / A of the display panel 100, and the touch line TL is disposed in the non-active area N / A of the display panel 100, so that touch sensing that matches the display state can be provided.

[0082] Figure 4 and Figure 5 An example of a subpixel structure of a display device according to an embodiment is shown.

[0083] Figure 4 and Figure 5 An example of a subpixel structure is shown in the case where the display panel of the display device according to the embodiment is an organic light-emitting display panel.

[0084] Reference Figure 4 and Figure 5 In the case where the display device 10 according to the embodiment is an organic light-emitting display device, each sub-pixel basically includes: an organic light-emitting diode (OLED); a driving transistor DRT for driving the organic light-emitting diode; a first transistor T1 for transmitting a data voltage to a first node N1 corresponding to the gate node of the driving transistor DRT; and a storage capacitor Cst for holding the data voltage corresponding to the image signal voltage or the voltage corresponding thereto for one frame time.

[0085] An organic light-emitting diode (OLED) may include a first electrode (e.g., an anode electrode or a cathode electrode), an organic layer, and a second electrode (e.g., a cathode electrode or an anode electrode). The organic layer includes one or more light-emitting layers and may also include a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, a charge generation layer, etc.

[0086] The ground voltage EVSS can be applied to the second electrode of an organic light-emitting diode (OLED).

[0087] A driving transistor (DRT) can drive an organic light-emitting diode (OLED) by providing a driving current to the OLED.

[0088] The driving transistor DRT may include a first node N1, a second node N2, and a third node N3.

[0089] The first node Nl of the driving transistor DRT is the node corresponding to the gate node and can be electrically connected to the source node or drain node of the first transistor Tl.

[0090] The second node N2 of the driving transistor DRT can be electrically connected to the first electrode of the organic light-emitting diode OLED, and can be either the source node or the drain node.

[0091] The third node N3 of the driving transistor DRT is the node for applying the driving voltage EVDD and can be electrically connected to the driving voltage line DVL for providing the driving voltage EVDD. It can be either a drain node or a source node.

[0092] The first transistor T1 can be electrically connected between the data line DL and the first node N1 of the drive transistor DRT, and can be controlled by receiving the scan signal SCAN at the gate node via the gate line.

[0093] The first transistor Tl can be turned on by the scan signal SCAN to transmit the data voltage Vdata provided from the data line DL to the first node Nl of the driving transistor DRT.

[0094] The storage capacitor Cst can be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT.

[0095] The storage capacitor Cst is not a parasitic capacitor (e.g., Cgs, Cgd) existing as an internal capacitor between the first node N1 and the second node N2 of the driving transistor DRT, but is an external capacitor intentionally designed to be outside the driving transistor DRT.

[0096] Simultaneously, for the voltage control of the second node N2 of the driving transistor DRT, or for the feature values ​​of the sensing sub-pixel (e.g., the threshold voltage or mobility of the driving transistor DRT, the threshold voltage of the organic light-emitting diode, etc.), such as Figure 5 As shown, each sub-pixel may also include a second transistor T2.

[0097] The second transistor T2 can be electrically connected between the second node N2 of the driving transistor DRT and the reference voltage line RVL that provides the reference voltage Vref, and can be controlled by receiving a sensing signal SENSE, which serves as a scan signal, at the gate node.

[0098] The second transistor T2 can be turned on by the sensing signal SENSE to apply the reference voltage Vref provided through the reference voltage line RVL to the second node N2 of the driving transistor DRT.

[0099] In addition, the second transistor T2 can be used as one of the voltage sensing paths for the second node N2 of the driving transistor DRT.

[0100] Meanwhile, the scan signal SCAN and the sensing signal SENSE can be separate gate signals. In this case, the scan signal SCAN and the sensing signal SENSE can be applied to the gate node of the first transistor T1 and the gate node of the second transistor T2 respectively through different gate lines.

[0101] In some cases, the scan signal SCAN and the sensing signal SENSE can be the same gate signal. In this case, the scan signal SCAN and the sensing signal SENSE can be applied together to the gate node of the first transistor T1 and the gate node of the second transistor T2 through the same gate line.

[0102] Each of the driving transistor DRT, the first transistor T1, and the second transistor T2 can be an n-type transistor or a p-type transistor.

[0103] Figure 6 The correspondence between the area of ​​the grid-type touch electrode TE and the sub-pixel area in the display device 10 according to an embodiment of the present disclosure is shown.

[0104] Reference Figure 6 In the display device 10 according to an exemplary embodiment, each of the plurality of touch electrodes TE can be an electrode metal EM in which holes OA are present by being patterned in a grid pattern. Here, holes OA are also referred to as open areas.

[0105] In a touch electrode TE formed by patterning the electrode metal EM into a grid, each hole OA can correspond to the light-emitting area of ​​one or more sub-pixels.

[0106] For example, if the display panel 100 is an LCD panel, the light-emitting area of ​​the sub-pixel may include a pixel electrode or a color filter. If the display panel 100 is an OLED panel, the light-emitting area of ​​the sub-pixel may include the anode electrode of an organic light-emitting diode, an organic light-emitting layer, etc., and in some cases, a color filter, etc.

[0107] As described above, when viewed in a planar view, the electrode metal EM of the touch electrode TE is patterned, with the light-emitting area of ​​one or more sub-pixels corresponding to the position of each of the open areas OA present in the area of ​​the touch electrode TE, thereby improving the luminous efficiency of the display panel 100 even if the electrode metal EM is made of an opaque material.

[0108] Figure 7A cross-section of a display panel according to a comparative example of this disclosure is briefly shown.

[0109] Reference Figure 7 The display panel 200 may include an encapsulation layer 220, a touch electrode 230 positioned on the encapsulation layer 220, a first insulating layer 250 positioned on the touch electrode 230, a color filter 260 positioned on the first insulating layer 250, and a black matrix 270 positioned on the first insulating layer 250.

[0110] The touch electrode 230 can be a touch sensor metal such as the touch electrode TE and touch line TL described above. The touch electrode 230 may include an aperture OA corresponding to the light-emitting area of ​​a sub-pixel.

[0111] The color filter 260 can be positioned on the touch electrode 230 and can include a first conversion section 261, a second conversion section 262, and a third conversion section 263. The first conversion section 261 can be a filter for transmitting light having a first color, the second conversion section 262 can be a filter for transmitting light having a second color, and the third conversion section 263 can be a filter for transmitting light having a third color.

[0112] The black matrix 270 can be positioned between two adjacent transformation sections in the first transformation section 261, the second transformation section 262, and the third transformation section 263.

[0113] The black matrix 270 can be positioned to overlap with the touch electrode 230.

[0114] In this specification, positioning a component as overlapping another component can mean that the other component is vertically positioned above or below the component in a vertical cross-section.

[0115] Since the black matrix 270 is positioned to overlap with the touch electrode 230, the black matrix 270 can block external light to reduce external light reflection, even if light from outside the display panel 200 propagates and is reflected by the touch electrode 230.

[0116] Figure 8 This is a cross-sectional view of the display panel based on the comparative example.

[0117] Reference Figure 8According to the comparative example, the display panel 200 may include a substrate 210, a first electrode 215 positioned on the substrate 210, a dam layer 216 positioned on the first electrode 215, an organic layer 217 positioned on the first electrode 215 and the dam layer 216, a second electrode 218 positioned on the organic layer 217 and the dam layer 216, an encapsulation layer 220 positioned on the second electrode 218, a touch electrode 230 positioned on the encapsulation layer 220, a first insulating layer 250 positioned on the touch electrode 230, a black matrix 270 positioned on the first insulating layer, and a color filter 260 positioned on the first insulating layer 250.

[0118] A first sub-pixel 211 including a first light-emitting region 211a and a second sub-pixel 212 including a second light-emitting region 212a can be defined on a substrate 210.

[0119] The black matrix 270 can be positioned to overlap with the touch electrode 230, thereby blocking external light L1 incident toward the touch electrode 230 before it reaches the touch electrode 230. Therefore, the reflectivity of the display panel 200 can be reduced by weakening the intensity of light L2 reflected from the touch electrode 230.

[0120] Figure 9 The light-emitting area and the non-light-emitting area of ​​a display panel 200 according to a comparative example of the present disclosure are shown.

[0121] Reference Figure 9 The display panel 200 may include a first light-emitting area 211a, a second light-emitting area 212a, a third light-emitting area 213a, and a non-light-emitting area 214. Since the light-emitting areas are regions where light generated from the organic layer is emitted, if the black matrix overlaps with the light-emitting areas, there may be a problem of reduced efficiency of the display panel 200. Therefore, a patterning process is required to form the black matrix to overlap with the non-light-emitting area 214. However, since the patterning process is performed using methods such as photolithography that require significant cost and time, the problem with the display panel 200 according to the comparative example is that a separate patterning process is required to form the black matrix 270.

[0122] Figure 10 This is a schematic cross-sectional view of a display panel 100 according to an embodiment of the present disclosure.

[0123] The display panel 100 may include an encapsulation layer 120, a touch electrode 130 positioned on the encapsulation layer 120, a first insulating layer 150 positioned on the touch electrode 130, and a color filter 160 positioned on the first insulating layer 150.

[0124] The encapsulation layer 120 is a layer used to protect circuit elements, such as organic light-emitting diodes (OLEDs), included in the display panel 100 from the influence of moisture and oxygen outside the display panel 100. The encapsulation layer 120 can be a single layer or multiple layers, and can be one or more selected from organic layers and inorganic layers.

[0125] The first insulating layer 150 is a layer used to planarize the touch electrode 130. The first insulating layer 150 may be a single layer or multiple layers, and may be at least one selected from organic layers and inorganic layers.

[0126] The color filter 160 may include a first conversion section 161, a second conversion section 162, and a third conversion section 163. The first to third conversion sections may be filters that transmit light of a specific color and block light of other colors. For example, the first conversion section 161 may transmit light of a first color and block light of a second and third color, the second conversion section 162 may transmit light of a second color and block light of the first and third colors, and the third conversion section 163 may transmit light of a third color and block light of the first and second colors.

[0127] The first conversion portion 161 and the third conversion portion 163 can be positioned to overlap in the non-light-emitting area 114. In the area where the first conversion portion 161 and the third conversion portion 163 overlap, light blocked by the first conversion portion 161 and light blocked by the third conversion portion 163 can be blocked. Therefore, unlike the display panel 100 according to the comparative example, even though the display panel 100 does not include a black matrix, the display panel 100 can prevent external light from being reflected by the touch electrode 130, thereby reducing external light reflection.

[0128] Figure 11 This is a cross-sectional view of a display panel 100 according to an embodiment of the present disclosure.

[0129] The display panel 100 according to embodiments of the present disclosure may include a substrate 110, an encapsulation layer 120 positioned on the substrate, a touch electrode 130 positioned on the encapsulation layer, a nanostructure 140 positioned on the touch electrode, a first insulating layer 150 positioned on the nanostructure, and a color filter 160 positioned on the first insulating layer 150.

[0130] The display panel 100 may include a substrate 110, a first electrode 115 positioned on the substrate 110, a dam layer 116 positioned on the first electrode 115, an organic layer 117 positioned on the first electrode 115 and the dam layer 116, a second electrode 118 positioned on the organic layer 117, an encapsulation layer 120 positioned on the second electrode 118, a touch electrode 130 positioned on the encapsulation layer 120, a nanostructure 140 positioned on the touch electrode 130, a first insulating layer 150 positioned on the nanostructure 140, and a color filter 160 positioned on the first insulating layer 150.

[0131] A first sub-pixel 111, a second sub-pixel (not shown), and a third sub-pixel 113 are defined on a substrate 110. The first sub-pixel 111 includes a first light-emitting region 111a for emitting light of a first color, the second sub-pixel includes a second light-emitting region (not shown) for emitting light of a second color, and the third sub-pixel 113 includes a third light-emitting region 113a for emitting light of a third color.

[0132] The substrate 110 includes a first light-emitting area 111a, a second light-emitting area (not shown), a third light-emitting area 113a, and a non-light-emitting area 114 positioned around the first light-emitting area 111a, the second light-emitting area, and the third light-emitting area 113a.

[0133] The touch electrode 130 may include a first metal layer 131. The type of the first metal layer 131 is not particularly limited, but may include one or more of, for example, titanium (Ti), molybdenum (Mo), aluminum (Al), and copper (Cu).

[0134] The touch electrode may include a second metal layer 132. The second metal layer 132 may include a metal different from the metal of the first metal layer 131, and the first metal layer 131 may be positioned on the second metal layer 132.

[0135] The type of the second metal layer 132 is not particularly limited, but may include one or more of, for example, titanium (Ti), molybdenum (Mo), aluminum (Al) and copper (Cu).

[0136] The touch electrode may include a third metal layer 133, and a second metal layer 132 may be positioned on the third metal layer 133. The third metal layer 133 may include a metal different from the metal of the first metal layer 131.

[0137] The type of the third metal layer 133 is not particularly limited, but may include one or more of, for example, titanium (Ti), molybdenum (Mo), aluminum (Al) and copper (Cu).

[0138] The first metal layer 131 and the third metal layer 133 may include the same metal.

[0139] The touch electrode 130 may have a structure consisting of a first metal layer 131, a second metal layer 132, and a third metal layer 133, starting from the top. Figure 11 A touch electrode 130 with such a structure is shown; however, the touch electrode 130 of the display panel according to embodiments of the present disclosure is not limited thereto.

[0140] The touch electrode 130 includes a first metal layer 131, a second metal layer 132, and a third metal layer 133. The first metal layer 131 may be Ti, the second metal layer 132 may be Al, and the third metal layer 133 may be Ti.

[0141] The nanostructure 140 can be in direct contact with the first metal layer 131.

[0142] The shape and size of the nanostructure 140 are not particularly limited, as long as it has a shape that can exhibit haze characteristics for external light reaching the nanostructure 140. Since the nanostructure 140 includes structures that can achieve haze, light reaching the touch electrode 130 can be prevented from being reflected.

[0143] The color filter 160 is positioned on the first insulating layer 150 and may include a first conversion portion 161 corresponding to a first sub-pixel 111, a second conversion portion (not shown) positioned on the first insulating layer 150 and corresponding to a second sub-pixel (not shown), and a third conversion portion 163 positioned on the first insulating layer 150 and corresponding to a third sub-pixel 113.

[0144] The nanostructure 140, the first conversion portion 161, and the third conversion portion 163 can be positioned to overlap in the non-light-emitting region 114. Since the nanostructure 140, the first conversion portion 161, and the third conversion portion 163 overlap with each other in the non-light-emitting region 114, external light reflection can be significantly reduced.

[0145] The intensity of light L1 incident towards the touch electrode 130 positioned in the non-light-emitting area 114 is weakened as it passes through the first conversion portion 161 and the third conversion portion 163, which are positioned overlapping in the non-light-emitting area 114. The light L2, whose intensity is weakened by passing through the first conversion portion 161 and the third conversion portion 163, can reach the nanostructure 140 positioned on the touch electrode 130. Since the nanostructure 140 includes structures capable of achieving haze, the intensity of light L2 may be very weak or may be blocked after reaching the nanostructure 140. Therefore, the intensity of light L3 reflected to the outside is very weak due to the first conversion portion 161, the third conversion portion 163, and the nanostructure 140, thus the display panel 100 can have a low reflectivity with respect to external light.

[0146] Based on the above structure, unlike the comparative example, even without forming a black matrix, the display panel 100 can have a low external light reflectivity, thereby omitting the process of forming a black matrix and reducing manufacturing costs and time.

[0147] Figure 12 A nanostructure 140 according to an embodiment of the present disclosure is shown.

[0148] Reference Figure 12 The nanostructure 140 may include a conical patterned layer 141 in direct contact with the first metal layer 131 and a semi-circular patterned layer 142 positioned on the conical patterned layer 141.

[0149] The cone pattern layer 141 is a pattern layer with a generally cone shape, and may have a shape in which the upper part of the cone is cut off.

[0150] The material of the tapered patterned layer 141 is not particularly limited, but may include, for example, one or more of the following: titanium (Ti), molybdenum (Mo), aluminum (Al), copper (Cu), silicon oxide (SixOy), silicon nitride (SixNy), silicon nitride oxide (SiNxOy), indium tin oxide (ITO), indium gallium oxide (IGO), indium zinc oxide (IZO), and indium gallium zinc oxide (IGZO).

[0151] The tapered patterned layer 141 may have a height of, for example, 100 nm to 500 nm from the base that is in direct contact with the first metal layer 131 in a vertical cross section.

[0152] The semi-circular pattern layer 142 is a pattern layer with a generally semi-circular shape, located on the conical pattern layer 141, and may have a convex side opposite to the conical pattern layer 141.

[0153] The material of the semi-circular pattern layer 142 is not particularly limited, but may include, for example, one or more of the following: titanium (Ti), molybdenum (Mo), aluminum (Al), copper (Cu), silicon oxide (SixOy), silicon nitride (SixNy), silicon nitride oxide (SiNxOy), indium tin oxide (ITO), indium gallium oxide (IGO), indium zinc oxide (IZO), and indium gallium zinc oxide (IGZO).

[0154] The semi-circular patterned layer 142 can have a maximum height of, for example, 10 nm to 100 nm from the base that is in direct contact with the conical patterned layer 141 in a vertical cross section.

[0155] When the nanostructure 140 includes the aforementioned conical patterned layer 141 and semi-circular patterned layer 142, the nanostructure 140 can be easily formed through a simple process.

[0156] The semi-circular patterned layer 142 can be made of a different material than the conical patterned layer 141. If the semi-circular patterned layer 142 and the conical patterned layer 141 are made of different materials, the nanostructure 140 can be easily formed through a simple process.

[0157] The cone-shaped patterned layer 141 can be made of a material different from that of the first metal layer 131. If the cone-shaped patterned layer 141 is made of a material different from that of the first metal layer 131, the nanostructure 140 can be easily formed through a simple process.

[0158] The conical patterned layer 141 can be made of an inorganic insulator. For example, the conical patterned layer can be made of silicon dioxide (SiO2).

[0159] The conical patterned layer 141 can be made of an inorganic insulator, and the semi-circular patterned layer 142 can be made of a metal oxide, and the semi-circular patterned layer can be in direct contact with the conical patterned layer. For example, the conical patterned layer can be made of silicon dioxide (SiO2), and the semi-circular patterned layer can be made of indium tin oxide (ITO).

[0160] The first metal layer 131 and the conical pattern layer 141 can be made of the same material, and the semi-circular pattern layer 142 can directly contact the conical pattern layer 141. For example, the first metal layer 131 and the conical pattern layer 141 can be made of titanium (Ti), and the semi-circular pattern layer 142 can be made of indium tin oxide (ITO).

[0161] In addition to Figure 12 In embodiments other than those shown, the nanostructure 140 may include a plurality of irregularly formed portions.

[0162] Multiple irregular portions can be made of inorganic insulators. For example, multiple irregular portions can be made of silicon dioxide (SiO2).

[0163] When the nanostructure 140 has the same structure as described above, the nanostructure 140 can have haze characteristics for light reaching the nanostructure 140, so that the display panel can have low external light reflectivity.

[0164] Figure 13This is a plan view of a display panel according to an embodiment of the present disclosure.

[0165] Reference Figure 13 The display panel 100 may include a first light-emitting area 111a, a second light-emitting area 112a, a third light-emitting area 113a, and a non-light-emitting area 114. The non-light-emitting area 114 may be positioned around the first light-emitting area 111a, the second light-emitting area 112a, and the third light-emitting area 113a.

[0166] In the first light-emitting area 111a, only the first conversion portion of the color filter conversion section can be located; in the second light-emitting area 112a, only the second conversion portion of the color filter conversion section can be located; and in the third light-emitting area 113a, only the third conversion portion of the color filter conversion section can be located. Therefore, the display panel can emit light of a first color in the first sub-pixel, light of a second color in the second sub-pixel, and light of a third color in the third sub-pixel.

[0167] In all or part of the non-light-emitting area 114, the first and third conversion portions of the color filter can be positioned to overlap each other. Therefore, since the first and third conversion portions can block external light from entering the touch electrodes located in the non-light-emitting area 114, the display panel can have a low external light reflectivity.

[0168] Figures 14 to 19 This is a diagram illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0169] Figure 14 The display panel 100 is shown at a specific stage in the manufacturing process of the display panel 100 according to an embodiment of the present disclosure. Figure 14 It is a cross-sectional view of a portion of the active area and a portion of the non-active area of ​​the display panel 100.

[0170] Reference Figure 14 According to embodiments of the present disclosure, the display panel 100 may include a substrate 110, an electrode metal 119a positioned on the substrate 110, a planarization layer 119c positioned on the electrode metal 119a, a first electrode 115 positioned on the planarization layer 119c, an organic layer 117 positioned on the first electrode 115, a dam layer 116 positioned on the planarization layer 119c and the first electrode 115, a second electrode 118 positioned on the organic layer 117 and the dam layer 116, an encapsulation layer 120 positioned on the second electrode, a touch electrode 130 positioned on the encapsulation layer 120, and a conical pattern layer 141 and a semi-circular pattern layer 142 positioned on the touch electrode 130.

[0171] The display panel 100 may include pads 119b in the non-active area.

[0172] Figure 14 The touch electrode 130, the conical pattern layer 141, and the semi-circular pattern layer 142 shown can be patterned to form the touch electrode, the conical pattern layer, and the semi-circular pattern layer of the display panel according to the embodiments of the present disclosure.

[0173] In this specification, for ease of description, when describing a method for manufacturing a display panel according to embodiments of the present disclosure, some components in intermediate stages will be referred to by reference numerals corresponding to components of the display panel in the final stage. However, the structure and shape of the corresponding components of the display panel according to embodiments of the present disclosure are not limited to the structures and shapes shown in the drawings used to illustrate intermediate steps of the manufacturing method.

[0174] Electrode metal 119a is used to drive the display panel and display device according to the embodiments of the present disclosure, and may be an electrode to which a driving voltage EVDD, a base voltage EVSS or a reference voltage Vref is applied.

[0175] The encapsulation layer 120 may include a second insulating layer 121, a third insulating layer 122, a fourth insulating layer 123, a fifth insulating layer 124, and a sixth insulating layer 125.

[0176] The display panel 100 may include a bridge 134 positioned on a fifth insulating layer 124. The bridge 134 may contact a touch electrode 130.

[0177] The touch electrode 130 may include a first metal layer 131, and the first metal layer 131 may include titanium (Ti).

[0178] like Figure 14 As shown, the touch electrode 130, the conical pattern layer 141, and the semi-circular pattern layer 142 can be sequentially formed over the entire area of ​​the display panel 100.

[0179] The conical patterned layer 141 can be made of silicon dioxide (SiO2), and the semi-circular patterned layer 142 can be made of indium tin oxide (ITO).

[0180] Figure 15 It shows in Figure 14 The etching process of the semi-circular pattern layer 142 is performed in the display panel 100. (Refer to...) Figure 15If the semi-circular pattern layer 142 and the conical pattern layer 141 are made of different materials, the semi-circular pattern layer 142 can be selectively etched only. For example, if the conical pattern layer 141 is silicon dioxide (SiO2) and the semi-circular pattern layer 142 is indium tin oxide (ITO), the semi-circular pattern layer 142 can be wet-etched under acidic conditions, thereby enabling the fabrication of... Figure 15 The display panel 100 shown.

[0181] In addition, such as Figure 15 As shown, the etching process of the semi-circular pattern layer 142 can be carried out to the extent that a portion of the semi-circular pattern layer 142 is retained.

[0182] Figure 16 It shows in Figure 15 The illustration shows an etching process for a tapered pattern layer 141 on a display panel. For example, when the tapered pattern layer 141 is made of silicon dioxide (SiO2) and the semi-circular pattern layer 142 is made of indium tin oxide (ITO), during dry etching of the tapered pattern layer 141, the remaining semi-circular pattern layer 142 prevents the tapered pattern layer 141 located below it from being etched, thus enabling the fabrication of... Figure 16 The display panel 100 shown.

[0183] In addition, through Figure 16 The remaining semi-circular pattern layer 142 shown, and the conical pattern layer 141 positioned below the semi-circular pattern layer 142, may have a shape in which the upper part of the cone is cut off.

[0184] Figure 17 It shows the Figure 16 The display panel shown is patterned with photoresist. The photoresist PR can be patterned to overlap with the non-light-emitting area 114.

[0185] Figure 18 It shows in Figure 17 The touch electrode 130 in the display panel shown is etched. Since the area other than the part protected by photoresist PR is etched, the touch electrode 130 may include holes OA or open areas corresponding to the light-emitting areas 111a, 112a and 113a of sub-pixels 111, 112 and 113.

[0186] Figure 19 It shows in Figure 18 The step of forming contact holes in pads 119b after forming a first insulating layer 150 on the touch electrode 130 and nanostructure 140 in the display panel shown. Figures 14 to 19 As shown, nanostructures 140 can be easily formed in the display panel 100 according to the embodiments of the present disclosure.

[0187] Figure 20 and Figure 21 Through Figures 14 to 19 Micrograph of the formed nanostructure. (See reference) Figure 20 and Figure 21 It can be seen that the nanostructure has a structure including conical patterned layers and semi-circular patterned layers.

[0188] Figures 22 to 27 This is a diagram illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0189] Reference Figure 22 According to embodiments of the present disclosure, the display panel 100 may include a substrate 110, an electrode metal 119a positioned on the substrate 110, a planarization layer 119c positioned on the electrode metal 119a, a first electrode 115 positioned on the planarization layer 119c, an organic layer 117 positioned on the first electrode 115, a dam layer 116 positioned on the planarization layer 119c and the first electrode 115, a second electrode 118 positioned on the organic layer 117 and the dam layer 116, an encapsulation layer 120 positioned on the second electrode, a touch electrode 130 and a tapered pattern layer 141 positioned on the encapsulation layer 120, and a semi-circular pattern layer 142 positioned on the touch electrode 130.

[0190] The first metal layer 131 and the conical patterned layer 141 can be manufactured by a process described later. Figure 22 A layer 130, 131, or 141 is formed. A layer 130, 131, or 141 may include, for example, titanium (Ti).

[0191] Figure 23 It shows in Figure 22 The etching process of the semi-circular pattern layer 142 is performed in the display panel 100. (Refer to...) Figure 23 When the semi-circular pattern layer 142 and the conical pattern layer 141 are made of different materials, the semi-circular pattern layer 142 can be selectively etched only. For example, if the first metal layer 131 and the conical pattern layer 141 are made of titanium (Ti) and the semi-circular pattern layer 142 is made of indium tin oxide (ITO), the semi-circular pattern layer 142 can be wet-etched under acidic conditions to manufacture... Figure 23 The display panel 100 shown.

[0192] In addition, such as Figure 23 As shown, the etching process of the semi-circular pattern layer 142 can be performed to the extent that a portion of the semi-circular pattern layer 142 is retained.

[0193] Figure 24 It shows in Figure 23The illustration shows an example of an etching process performed on a display panel with a tapered pattern layer 141. For instance, if the tapered pattern layer 141 is made of titanium (Ti) and the semi-circular pattern layer 142 is made of indium tin oxide (ITO), when the tapered pattern layer 141 is dry-etched, the remaining semi-circular pattern layer 142 can prevent the underlying tapered pattern layer 141 from being etched, thus enabling the fabrication of... Figure 24 The display panel 100 shown.

[0194] In addition, through Figure 24 The remaining semi-circular pattern layer 142 shown, and the conical pattern layer 141 located below the semi-circular pattern layer 142, may have a shape in which the upper part of the cone is cut off.

[0195] Figure 25 It shows in Figure 24 The image shows a display panel with photoresist patterning. The photoresist PR can be patterned to overlap with the non-light-emitting area 114.

[0196] Figure 26 It shows in Figure 25 The state of the etched touch electrode 130 in the display panel is shown. Since the area other than the part protected by photoresist PR is etched, the touch electrode 130 may include holes OA or open areas corresponding to the light-emitting areas 111a, 112a and 113a of sub-pixels 111, 112 and 113.

[0197] Figure 27 It shows in Figure 26 The state shown is that after the first insulating layer 150 is formed on the touch electrode 130 and nanostructure 140 in the display panel, a contact hole is formed in the pad 119b. Figures 22 to 27 As shown, nanostructures 140 can be easily formed in the display panel 100 according to the embodiments of the present disclosure.

[0198] Figures 28 to 33 This is a diagram illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

[0199] Reference Figure 28According to an embodiment of the present invention, the display panel 100 may include a substrate 110, an electrode metal 119a positioned on the substrate 110, a planarization layer 119c positioned on the electrode metal 119a, a first electrode 115 positioned on the planarization layer 119c, an organic layer 117 positioned on the first electrode 115, a dam layer 116 positioned on the planarization layer 119c and the first electrode 115, a second electrode 118 positioned on the organic layer 117 and the dam layer 116, an encapsulation layer 120 positioned on the second electrode, a touch electrode 130 positioned on the encapsulation layer 120, and a nanostructure 140 positioned on the touch electrode 130.

[0200] The touch electrode 130 may include a first metal layer 131, and the first metal layer 131 may include titanium (Ti).

[0201] The nanostructure 140 may include silicon dioxide (SiO2). Since the nanostructure 140 is formed after circuit elements such as organic light-emitting diodes (OLEDs) are formed thereunder, the nanostructure 140 can be formed in a low-temperature process and may include, for example, silicon dioxide (SiO2) formed in a low-temperature process.

[0202] Figure 29 It shows in Figure 28 The image shows the state of the etching process of the nanostructure 140 being performed on the display panel. For example, if the nanostructure 140 is made of silicon dioxide (SiO2) formed at low temperature, multiple irregularities may be formed on the surface during wet etching due to the characteristics of silicon dioxide (SiO2) formed at low temperature.

[0203] Figure 30 It shows in Figure 29 The image shows a display panel in the state of photoresist patterning. The photoresist PR can be patterned to overlap with the non-light-emitting area 114.

[0204] Figure 31 Through until Figure 30 Micrograph of the nanostructure 140 formed by the manufacturing method. (See reference) Figure 31 The nanostructure 140 may include multiple irregularly formed parts.

[0205] Figure 32 It shows in Figure 30 The illustration shows an etched nanostructure 140 and touch electrode 130 in a display panel. Since the area except for the portion protected by photoresist PR is etched, the touch electrode 130 can be formed as a hole OA or open area corresponding to the light-emitting areas 111a, 112a and 113a of sub-pixels 111, 112 and 113.

[0206] Figure 33 It shows in Figure 32 The state shown is that after the first insulating layer 150 is formed on the touch electrode 130 and nanostructure 140 in the display panel, a contact hole is formed in the pad 119b. Figures 28 to 33 As shown, in the display panel 100 according to the embodiments of the present disclosure, a nanostructure 140 including a plurality of irregularly formed irregular portions can be easily formed.

[0207] Figure 34 A display panel is shown in which a color filter 160 is formed after the formation of the first insulating layer 150.

[0208] Reference Figure 34 After the first insulating layer 150 is formed, a color filter 160 including a first conversion portion 161, a second conversion portion 162 and a third conversion portion 163 can be formed on the first insulating layer 150.

[0209] In the non-luminescent region 114, the first conversion portion 161 and the third conversion portion 163 of the color filter can be positioned to overlap each other.

[0210] In this example, the first color can be red, the second color can be green, and the third color can be blue.

[0211] In another aspect, embodiments of this disclosure may provide a display device including a display panel and a control unit for driving the display panel.

[0212] In the display device according to the embodiments of the present disclosure, the display panel is the same as that described for the display panel according to the embodiments of the present disclosure, so repeated descriptions will be omitted.

[0213] The above description is presented to enable any person skilled in the art to implement and use the technical concepts of the invention, and is provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the invention. The above description and drawings provide examples of the technical concepts of the invention for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical concepts of the invention. Therefore, the scope of the 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 invention should be understood based on the appended claims, and all technical concepts within their equivalents should be understood to be included within the scope of the invention.

Claims

1. A display panel, comprising: A substrate, wherein a first sub-pixel, a second sub-pixel, and a third sub-pixel are defined, the first sub-pixel includes a first light-emitting region that emits light of a first color, the second sub-pixel includes a second light-emitting region that emits light of a second color, the third sub-pixel includes a third light-emitting region that emits light of a third color, and the substrate includes a non-light-emitting region positioned around the first light-emitting region, the second light-emitting region, and the third light-emitting region. An encapsulation layer, which is positioned on the substrate; A touch electrode, which is positioned on the encapsulation layer and includes a first metal layer; A nanostructure is positioned on the touch electrode and is in direct contact with the first metal layer; A first insulating layer is positioned on the nanostructure; as well as A color filter includes a first conversion portion positioned on the first insulating layer and corresponding to the first sub-pixel, a second conversion portion positioned on the first insulating layer and corresponding to the second sub-pixel, and a third conversion portion positioned on the first insulating layer and corresponding to the third sub-pixel. In the non-luminescent region, the nanostructure, the first conversion portion, and the third conversion portion are positioned to overlap each other.

2. The display panel according to claim 1, wherein, The touch electrode further includes a second metal layer, which comprises a metal different from that of the first metal layer, and the first metal layer is disposed on the second metal layer.

3. The display panel according to claim 2, wherein, The touch electrode further includes a third metal layer, which comprises a metal different from that of the first metal layer, and the second metal layer is disposed on the third metal layer.

4. The display panel according to claim 2, wherein, The touch electrode further includes a third metal layer, on which the second metal layer is disposed, and the first metal layer and the third metal layer comprise the same metal.

5. The display panel according to claim 1, wherein, The nanostructure includes a conical patterned layer in direct contact with the first metal layer and a semi-circular patterned layer positioned on the conical patterned layer.

6. The display panel according to claim 5, wherein, The semi-circular patterned layer is made of a different material than the conical patterned layer.

7. The display panel according to claim 5, wherein, The conical patterned layer is made of a material different from that of the first metal layer.

8. The display panel according to claim 5, wherein, The conical patterned layer is composed of an inorganic insulator.

9. The display panel according to claim 5, wherein, The conical patterned layer is composed of an inorganic insulator, and the semi-circular patterned layer is composed of a metal oxide. The semi-circular pattern layer is in direct contact with the conical pattern layer.

10. The display panel according to claim 5, wherein, The first metal layer and the conical pattern layer are made of the same material, and the semi-circular pattern layer is in direct contact with the conical pattern layer.

11. The display panel according to claim 1, wherein, The nanostructure comprises multiple irregularly formed portions.

12. The display panel according to claim 11, wherein, The irregularly formed plurality of irregular portions are composed of inorganic insulators.

13. A display device, comprising: Display panel; and Control unit for controlling the display panel, The display panel includes: A substrate, wherein a first sub-pixel, a second sub-pixel, and a third sub-pixel are defined, the first sub-pixel includes a first light-emitting region that emits light of a first color, the second sub-pixel includes a second light-emitting region that emits light of a second color, the third sub-pixel includes a third light-emitting region that emits light of a third color, and the substrate includes a non-light-emitting region positioned around the first light-emitting region, the second light-emitting region, and the third light-emitting region. An encapsulation layer, which is positioned on the substrate; A touch electrode, which is positioned on the encapsulation layer and includes a first metal layer; A nanostructure is positioned on the touch electrode and is in direct contact with the first metal layer; A first insulating layer, which is positioned on the nanostructure; and A color filter includes a first conversion portion positioned on the first insulating layer and corresponding to the first sub-pixel, a second conversion portion positioned on the first insulating layer and corresponding to the second sub-pixel, and a third conversion portion positioned on the first insulating layer and corresponding to the third sub-pixel. In the non-luminescent region, the nanostructure, the first conversion portion, and the third conversion portion are positioned to overlap each other.

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