Display Devices

Abstract

A display device includes a substrate and a plurality of pixels positioned on the substrate. Each pixel includes a first electrode, a partition wall including a first opening overlapping the first electrode, and a low-refractive layer including a second opening overlapping the first opening. The plurality of pixels include a first plurality of pixels having a first gap between an edge of the first opening and an edge of the second opening, and a second plurality of pixels having a second gap between an edge of the first opening and an edge of the second opening. The first gap and the second gap have different lengths from each other. At least one of the first plurality of pixels and at least one of the second plurality of pixels emit light of the same color as each other.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2019-0123996 filed on October 7, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The inventive concept relates to a display device, and more particularly, to a display device including a touch portion that can improve efficiency dispersion. Background Art

[0004] A light-emitting display device (hereinafter sometimes simply referred to as a display device) is a self-luminous display device that displays an image by using a light-emitting diode. The light-emitting display device provides features including low power consumption, high brightness, and high response speed.

[0005] The display device has a multilayer structure. For example, the display device may have a multilayer structure including a light emitting diode and a touch portion. When the light generated by the light emitting diode is emitted to the outside, due to the multilayer structure, reflection and total reflection, etc. may occur at the interlayer interface of the display device. Some of the light generated by the light emitting diode is dissipated by reflection and total reflection, etc., and therefore, the light emitting efficiency and display quality of the display device may be reduced.

[0006] Additionally, the efficiency spread of the display device may vary due to alignment deviations of the individual layers of the multilayer structure. Summary of the invention

[0007] The inventive concept relates to a display device having improved efficiency distribution.

[0008] An exemplary embodiment of the present inventive concept provides a display device including a substrate and a plurality of pixels positioned on the substrate. Each pixel includes a first electrode, a partition wall including a first opening overlapping the first electrode, and a low-refractive layer including a second opening overlapping the first opening. The plurality of pixels include a first plurality of pixels having a first gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The plurality of pixels further include a second plurality of pixels having a second gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The first gap and the second gap have different lengths from each other in a direction parallel to the upper surface of the substrate. At least one of the first plurality of pixels and at least one of the second plurality of pixels emit light of the same color as each other.

[0009] The number of pixels having the first gap and the number of pixels having the second gap may be the same.

[0010] Each of the first gap and the second gap may be 0.1 μm to 2 μm.

[0011] In one pixel, a distance between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate may be the same in all directions.

[0012] In a plan view, a size of the first opening may be smaller than a size of the second opening.

[0013] Some of the multiple pixels may have a third gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, other pixels of the multiple pixels may have a fourth gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, and the third gap and the fourth gap may have different values.

[0014] An average value of the third gap and the fourth gap and an average value of the first gap and the second gap may be the same.

[0015] Some of the multiple pixels may have a fifth gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, other pixels of the multiple pixels may have a sixth gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, and the fifth gap and the sixth gap may have different values.

[0016] An average value of the fifth gap and the sixth gap, an average value of the third gap and the fourth gap, and an average value of the first gap and the second gap may be the same.

[0017] In some of the plurality of pixels, a distance between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate may be an average value of the first gap and the second gap.

[0018] The display device may further include: a second electrode overlapping the first electrode; a light emitting layer arranged between the first electrode and the second electrode; a thin film encapsulation layer arranged on the second electrode; and a sensing electrode located on the thin film encapsulation layer, and the low refractive layer may be arranged on the sensing electrode.

[0019] A high refractive layer disposed in the second opening may be further included.

[0020] The low refractive layer may have a refractive index of 1.40 to 1.59, and the high refractive layer may have a refractive index of 1.60 to 1.80.

[0021] Another exemplary embodiment of an embodiment of the present invention provides a display device including a substrate and a plurality of pixels positioned on the substrate. Each pixel includes: a first electrode; a partition wall including a first opening overlapping the first electrode; a low refractive layer including a second opening overlapping the first opening; and a high refractive layer positioned in the second opening. The plurality of pixels include a first plurality of pixels having a first gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The plurality of pixels also include a second plurality of pixels having a second gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The second gap has a length different from the length of the first gap. The plurality of pixels include a third plurality of pixels having a third gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The third gap has a length equal to the average of the lengths of the first gap and the second gap.

[0022] Pixels having the first gap, pixels having the second gap, and pixels having the average gap may emit light of the same color.

[0023] Some of the multiple pixels may have a third gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, other pixels of the multiple pixels may have a fourth gap different from the third gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, and an average value of the third gap and the fourth gap may be the same as an average value of the first gap and the second gap.

[0024] Some of the plurality of pixels may have a fifth gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, other pixels of the plurality of pixels may have a sixth gap different from the fifth gap between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate, and an average value of the fifth gap and the sixth gap may be the same as an average value of the first gap and the second gap.

[0025] Another exemplary embodiment of the inventive concept provides a display device including a substrate and a plurality of first electrodes positioned on the substrate. The partition wall has a plurality of first openings respectively overlapping the first electrodes. The light-emitting layer is positioned in the first opening. The second electrode is arranged on the light-emitting layer. The low-refractive layer is arranged on the second electrode and includes a second opening overlapping the first opening. The high-refractive layer is positioned in the second opening of the low-refractive layer. In a direction parallel to the upper surface of the substrate, the length of the first opening is less than the length of the second opening. The plurality of first electrodes include a first plurality of first electrodes having a first gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The plurality of first electrodes also include a second plurality of first electrodes having a second gap between an edge of the first opening and an edge of the second opening in a direction parallel to the upper surface of the substrate. The second gap has a length different from the length of the first gap.

[0026] The color of light emitted from the light emitting layer overlapping the first electrode having the first gap thereon may be the same as the color of light emitted from the light emitting layer overlapping the first electrode having the second gap thereon.

[0027] On some of the plurality of first electrodes, a distance between an edge of the first opening and an edge of the second opening in a direction parallel to the substrate may be an average value of the first gap and the second gap.

[0028] According to exemplary embodiments of the inventive concept, a display device having improved efficiency distribution is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A plan view of a display device according to an exemplary embodiment of the inventive concept is illustrated.

[0030] Figure 2 An exploded perspective view of a light emitting display device according to an exemplary embodiment of the inventive concept is illustrated.

[0031] Figure 3 Picture shows Figure 2 A magnified top view of a portion of the area.

[0032] Figure 4 FIG. 1 shows an exemplary embodiment of the present invention. Figure 3 A cross-sectional view of the light-emitting display device taken along line IV-IV'.

[0033] Figure 5 A top plan view of a plurality of first electrodes and a plurality of first openings according to an exemplary embodiment of the inventive concept is illustrated.

[0034] Figure 6 A cross-sectional view of a light emitting display device according to an exemplary embodiment of the inventive concept is illustrated.

[0035] Figure 7 A top view of a pixel having a first gap and a pixel having a second gap according to an exemplary embodiment of the inventive concept is illustrated.

[0036] Figure 8 A graph showing efficiency dispersion of display devices according to a first comparative embodiment and a second comparative embodiment of the inventive concept is illustrated.

[0037] Fig. 9 A plan view of a pixel having a first gap and a pixel having a second gap according to an exemplary embodiment of the inventive concept and a graph showing a front efficiency ratio according to a gap size are illustrated.

[0038] Fig.10 A graph showing efficiency dispersion of display devices according to a second comparative embodiment and a third exemplary embodiment of the inventive concept is illustrated.

[0039] Fig.11 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0040] Fig.12 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0041] Fig.13 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0042] Fig.14 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0043] Fig.15 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0044] Fig.16 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated.

[0045] Fig.17 A plan view of a display device according to another exemplary embodiment of the inventive concept is illustrated. DETAILED DESCRIPTION

[0046] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the inventive concept are shown. As will be appreciated by those skilled in the art, the described exemplary embodiments may be modified in various different ways without departing from the spirit or scope of the inventive concept.

[0047] Parts irrelevant to the description will be omitted to clearly describe the present inventive concept, and the same reference numerals denote the same elements throughout the specification.

[0048] Further, in the drawings, the size and thickness of each element are arbitrarily illustrated for the convenience of description, and the inventive concept is not necessarily limited to those sizes and thicknesses illustrated in the drawings. In the drawings, the thickness of layers, films, panels, regions, etc. are exaggerated for the sake of clarity. In the drawings, the thickness of some layers and regions are exaggerated for the convenience of description.

[0049] It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element, or there can be intermediate elements. In contrast, when an element is referred to as being "directly on" another element, there are no intermediate elements. Further, in the specification, the term "on" or "above" refers to being positioned above or below an object portion, and does not necessarily refer to being positioned on the upper side of the object portion based on the direction of gravity.

[0050] In addition, unless explicitly described to the contrary, the term “comprise” and variations such as “comprising” or “including”, will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0051] Further, throughout the specification, the term "in a plan view" means observing a target portion from the top, and the term "in a cross section" means observing a cross section formed by vertically cutting the target portion from the side.

[0052] Hereinafter, a display device according to an exemplary embodiment of the inventive concept will be described in detail with reference to the accompanying drawings.

[0053] Figure 1 A display apparatus 1000 according to an exemplary embodiment of the inventive concept is schematically illustrated. Figure 1 The second opening 455 of the low-refractive layer 450 and the first opening 195 of the partition wall 190 according to an exemplary embodiment of the inventive concept are mainly illustrated. The detailed configuration of all pixels including the low-refractive layer 450 and the partition wall 190 will be described in detail later with reference to other drawings. Figure 1 , the first opening 195 is a light emitting diode 210 (see Figure 4 ) of the light emitting layer 212 (see Figure 4 ) is positioned in an area where the light is emitted therefrom, and the second opening 455 of the low refractive layer 450 is a layer that causes total reflection of light emitted from the light emitting diode 210 to improve light emission efficiency. The first opening 195 and the second opening 455 form one pixel PX.

[0054] exist Figure 1, the gaps G1 and G2 between the edge of the first opening 195 and the edge of the second opening 455 are different. In this specification, the gap between the edge of the first opening 195 and the adjacent edge of the second opening 455 is referred to as a gap. For example, unless otherwise described, the term gap used in this document refers to the distance between the edge of the first opening 195 and the edge of the second opening 455. The distance may be the shortest distance in a direction parallel to the substrate.

[0055] In the display device 1000 according to an exemplary embodiment of the inventive concept, the first gap G1 of the first plurality of pixels is a first distance, and the second gap G2 of the second plurality of pixels is a second distance. In an exemplary embodiment, among all pixels of the display device 1000, the number of the first plurality of pixels having the first gap G1 of the first distance and the number of the second plurality of pixels having the second gap G2 of the second distance are the same. In an exemplary embodiment, the difference between the first gap G1 and the second gap G2 may be about 1 μm. However, the exemplary embodiments of the inventive concept are not limited thereto. For example, in other exemplary embodiments, the difference between the first gap G1 and the second gap G2 may be about 0.2 μm to about 2 μm. The efficiency spread may be a spread of different front luminous efficiency values ​​of a plurality of pixels. The difference in the front luminous efficiency value may be based on the difference in the gap size of the pixel. The efficiency spread of the display device 1000 may be mitigated by including pixels having gaps of two or more different values ​​(e.g., length). The effect of the efficiency spread of the display device 1000 caused by the gaps having two or more different values ​​of the pixels will be described later.

[0056] Hereinafter, a detailed structure of the display device 1000 according to an exemplary embodiment of the inventive concept will be described in detail.

[0057] Figure 2 An exploded perspective view of a light emitting display device according to an exemplary embodiment of the inventive concept is illustrated, and Figure 3 FIG. 1 illustrates an exemplary embodiment according to the present inventive concept. Figure 2 A magnified top view of a portion of the area.

[0058] Reference Figure 2, the light-emitting display device 1000 according to an exemplary embodiment of the inventive concept includes a display portion DP and a touch portion TP. In the present embodiment, although the display portion DP and the touch portion TP are shown in a form in which they are separated from each other for the sake of convenience of description, the display portion DP and the touch portion TP according to the exemplary embodiment of the inventive concept are formed integrally. For example, the light-emitting display device 1000 according to the exemplary embodiment of the inventive concept will be described as having an on-unit structure in which the touch portion TP is directly arranged on the display portion DP without a separate substrate. However, the exemplary embodiments of the inventive concept are not limited thereto, and an in-unit structure in which the touch portion TP is formed in the display portion DP may be provided.

[0059] The display portion DP may be divided into a display area DA and a non-display area NDA. The display portion DP includes a plurality of pixels PX arranged in a matrix form in the display area DA. The plurality of pixels PX according to an exemplary embodiment of the inventive concept are illustrated as having a diamond shape. However, the exemplary embodiments of the inventive concept are not limited thereto. For example, in other exemplary embodiments, the plurality of pixels PX may have various shapes such as a circular shape, a polygonal shape, etc.

[0060] The touch part TP is disposed on the display part DP. The touch part TP includes one or more sensing electrodes SE for detecting the presence or absence of a touch and a touch coordinate.

[0061] Reference Figure 3 In the exemplary embodiment shown in , the sensing electrode SE may include a first sensing electrode SE1 extending in a first direction D1 and a second sensing electrode SE2 extending in a second direction D2 crossing the first direction D1.

[0062] In an exemplary embodiment, in a plan view, the first sensing electrode SE1 and the second sensing electrode SE2 may be arranged to surround the pixel PX.

[0063] For example, Figure 3 As shown in the exemplary embodiment of FIG. 1 , one pixel PX may be surrounded by the first sensing electrode SE1 and the second sensing electrode SE2. Figure 3As shown in the exemplary embodiment of , two first sensing electrodes SE1 and two second sensing electrodes SE2 may surround a pixel PX to completely surround the pixel PX. However, exemplary embodiments of the inventive concept are not limited thereto, and the configuration of the first sensing electrodes SE1 and the second sensing electrodes SE2 surrounding the pixel PX may vary. For example, in another exemplary embodiment, in a plan view, a pair of adjacent first sensing electrodes SE1 and a pair of adjacent second sensing electrodes SE2 may be arranged to surround four pixels PX forming a pixel group. The accuracy of touch sensing may vary depending on the density of the first sensing electrodes SE1 and the second sensing electrodes SE2.

[0064] In addition, although the first sensing electrode SE1 and the second sensing electrode SE2 are illustrated as having a mesh electrode shape in a plan view, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the first sensing electrode SE1 and the second sensing electrode SE2 may have a surface electrode shape, respectively.

[0065] In an exemplary embodiment, the first sensing electrode SE1 and the second sensing electrode SE2 may each include a metal or a transparent conductive oxide (TCO). For example, the transparent conductive oxide (TCO) may include at least one material selected from indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotubes (CNTs), and graphene.

[0066] The first sensing electrode SE1 is electrically connected to the first transfer wiring 510, and the second sensing electrode SE2 is electrically connected to the second transfer wiring 520. Figure 3 As shown in the exemplary embodiment of FIG. 5 , the first transmission wiring 510 and the second transmission wiring 520 may extend substantially along the third direction D3 , respectively. However, exemplary embodiments of the inventive concept are not limited thereto.

[0067] The first transmission wiring 510 and the second transmission wiring 520 are respectively connected to the touch driver 500. Although the first transmission wiring 510 and the second transmission wiring 520 are illustrated as being respectively connected to one touch driver 500, exemplary embodiments of the inventive concept are not limited thereto. For example, in other exemplary embodiments, the first transmission wiring 510 and the second transmission wiring 520 may be respectively connected to separate touch drivers 500.

[0068] The touch driver 500 may input a driving signal to the first sensing electrode SE1, and determine whether there is a touch and a touch coordinate by using a capacitance change amount or a voltage change amount measured at the second sensing electrode SE2. In an exemplary embodiment, the touch driver 500 may be directly disposed on a substrate as an integrated circuit (IC), or may be formed to have a separate configuration.

[0069] Figure 4 The diagram shows the Figure 3 A cross-sectional view of the light-emitting display device taken along line IV-IV', and Figure 5 A schematic top view of a plurality of first electrodes and a plurality of first openings according to an exemplary embodiment of the inventive concept is illustrated.

[0070] Reference Figure 4 According to an exemplary embodiment, the light emitting display device 1000 includes a display part DP and a touch part TP disposed on the display part DP.

[0071] The display portion DP includes a substrate 110 , a driving circuit portion 130 , a partition wall 190 , a light emitting diode 210 , and a thin film encapsulation layer 301 .

[0072] In an exemplary embodiment, the substrate 110 may be made of an insulating material such as glass, quartz, ceramic, and plastic. However, exemplary embodiments of the inventive concept are not limited thereto. The substrate 110 may be flexible.

[0073] The buffer layer 120 is disposed on the substrate 110. For example, Figure 4 As shown in the exemplary embodiment of the present invention, the bottom surface of the buffer layer 120 may directly contact the top surface of the substrate 110. In the exemplary embodiment, the buffer layer 120 may include an inorganic film or an organic film and may have a multilayer structure. The buffer layer 120 prevents impurities and moisture, etc. from penetrating into the driving circuit part 130 and the light emitting diode 210, and at the same time makes the surface flat. However, in another exemplary embodiment of the present inventive concept, the buffer layer 120 may be omitted.

[0074] The driving circuit part 130 is positioned on the buffer layer 120. For example, Figure 4 As shown in the exemplary embodiment of , the bottom surface of the driving circuit part 130 may be directly disposed on the upper surface of the buffer layer 120. The driving circuit part 130 includes a plurality of thin film transistors 20 and a capacitor 80 to drive the light emitting diode 210. In addition, the driving circuit part 130 may include a gate line positioned along one direction and a data line 171 and a common power line 172 insulated from and crossing the gate line.

[0075] The light emitting diode 210 emits light according to a driving signal received from the driving circuit part 130 to display an image.

[0076] In an exemplary embodiment of the inventive concept, the light-emitting display device 1000 may have a 2Tr-1Cap structure in which two thin film transistors 20 and one capacitor 80 are provided in one pixel PX, or may have various structures in which three or more thin film transistors 20 and two or more capacitors 80 are provided in one pixel PX. However, the exemplary embodiments of the inventive concept are not limited thereto.

[0077] The capacitor 80 includes a pair of capacitor plates 158 and 178 with an interlayer insulating film 145 disposed therebetween. In this embodiment, the interlayer insulating film 145 becomes a dielectric. The capacity of the capacitor 80 is determined by the charge stored in the capacitor 80 and the voltage between the two capacitor plates 158 and 178.

[0078] The thin film transistor 20 includes a semiconductor layer 132, a gate electrode 155, a source electrode 176, and a drain electrode 177. The semiconductor layer 132 and the gate electrode 155 are insulated by a gate insulating film 140 disposed therebetween. Figure 4 As shown in the exemplary embodiment of , the lower surface of the gate insulating film 140 directly contacts the upper surface of the semiconductor layer 132, and the upper surface of the gate insulating film 140 directly contacts the lower surface of the gate electrode 155. The light emitting diode 210 may include a first electrode 211, a light emitting layer 212, and a second electrode 213. Figure 4 As shown in the exemplary embodiment of , the upper surface of the light emitting layer 212 may directly contact the lower surface of the second electrode 213, and the lower surface of the light emitting layer 212 may directly contact the upper surface of the first electrode 211. The thin film transistor 20 applies driving power to the first electrode 211 for emitting light from the light emitting layer 212 of the light emitting diode 210 in the selected pixel PX. In this embodiment, the gate electrode 155 is connected to the capacitor plate 158, the source electrode 176 and the other capacitor plate 178 are respectively connected to the common power line 172, and the drain electrode 177 is connected to the first electrode 211 of the light emitting diode 210 through the opening located in the planarization film 146.

[0079] The planarization film 146 is positioned on the interlayer insulating film 145. For example, Figure 4 As shown in the exemplary embodiment of , the lower surface of the planarization film 146 may directly contact the upper surface of the interlayer insulating film 145. The planarization film 146 is made of an insulating material and protects the driving circuit part 130. In an exemplary embodiment, the planarization film 146 and the interlayer insulating film 145 may include the same material. However, exemplary embodiments of the inventive concept are not limited thereto.

[0080] The first electrode 211 is positioned on the planarization film 146. The first electrode 211 may be a pixel electrode and may be an anode. The first electrode 211 is conductive and may be a transmissive electrode, a transflective electrode, or a reflective electrode.

[0081] The partition wall 190 is formed on the planarization film 146 to divide the light emitting area. Figure 4 As shown in the exemplary embodiment of , the lower surface of the partition wall 190 may directly contact the upper surface of the planarization film 146. In this embodiment, the light emitting area is also referred to as a pixel area. In an exemplary embodiment, the partition wall 190 may include a polymer organic material. For example, the partition wall 190 may include at least one material selected from a polyimide (PI) resin, a polyacrylic resin, a PET resin, and a PEN resin. However, exemplary embodiments of the inventive concept are not limited thereto.

[0082] The partition wall 190 may include a first opening 195, and the first opening 195 may overlap with the first electrode 211 (e.g., in the thickness direction of the substrate 110). The first electrode 211 partially overlaps with the partition wall 190, and does not overlap with the partition wall 190 in the first opening 195. The first opening 195 may be defined as a region in the upper portion of the first electrode 211 that does not overlap with the partition wall 190. In addition, a portion where the partition wall 190 and the first electrode 211 contact each other in the first opening 195 is defined as an edge of the first opening 195.

[0083] Reference Figure 5 , the partition wall 190 includes a plurality of first openings 195 respectively corresponding to the plurality of pixels PX. In an exemplary embodiment, the plurality of pixels PX include a red pixel R emitting red light, a green pixel G emitting green light, and a blue pixel B emitting blue light. In this embodiment, the red light emitting diode 210 of the red pixel R includes a red light emitting layer, the green light emitting diode 210 of the green pixel G includes a green light emitting layer, and the blue light emitting diode 210 of the blue pixel B includes a blue light emitting layer. However, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the plurality of pixels PX may include pixels emitting cyan, magenta, and yellow light.

[0084] Reference Figure 5 In an exemplary embodiment, each of the plurality of first openings 195 may have a shape similar to that of the first electrode 211 in a plan view. Figure 5 As shown in , in a plan view (eg, in a plane parallel to the upper surface of the substrate 110 ), the edge of the first opening 195 and the first electrode 211 may each have an octagonal shape similar to a rhombus.

[0085] In this embodiment, the plurality of first electrodes 211 corresponding to each of the red pixel R, the green pixel G, and the blue pixel B may have different sizes in a plan view (e.g., lengths in a direction parallel to the upper surface of the substrate 110). Similarly, the plurality of first openings 195 corresponding to each of the red pixel R, the green pixel G, and the blue pixel B may have different sizes in a plan view (e.g., lengths in a direction parallel to the upper surface of the substrate 110). For example, Figure 5 , the first opening 195 and the first electrode 211 corresponding to the red pixel R may be respectively formed to have a size larger than that of the first opening 195 and the first electrode 211 corresponding to the green pixel G in a plan view. The first opening 195 and the first electrode 211 corresponding to the red pixel R may be respectively formed to have a size less than or equal to that of the first opening 195 and the first electrode 211 corresponding to the blue pixel B. However, exemplary embodiments of the inventive concept are not limited thereto, and each of the first opening 195 and the first electrode 211 may be formed to have various sizes.

[0086] In addition, the light-emitting display device 1000 according to the exemplary embodiment may have a honeycomb structure. However, the exemplary embodiments of the inventive concept are not limited thereto. Figure 5 As shown in , in the Nth row, a plurality of first electrodes 211 corresponding to the green light emitting layer are arranged to be spaced apart at a predetermined gap, and, in the adjacent N+1th row, the first electrodes 211 corresponding to the red light emitting layer and the first electrodes 211 corresponding to the blue light emitting layer may be alternately arranged. In the same manner, in the adjacent N+2th row, a plurality of first electrodes 211 corresponding to the green light emitting layer are arranged to be spaced apart at a predetermined gap, and in the adjacent N+3th row, the first electrodes 211 corresponding to the blue light emitting layer and the first electrodes 211 corresponding to the red light emitting layer may be alternately arranged.

[0087] In addition, the first electrodes 211 corresponding to the plurality of green light-emitting layers arranged in the Nth row may be arranged alternately with the first electrodes 211 corresponding to the plurality of red light-emitting layers and the plurality of blue light-emitting layers arranged in the N+1th row. For example, the first electrodes 211 corresponding to the red light-emitting layers and the blue light-emitting layers may be arranged alternately in the Mth column, and the first electrodes 211 corresponding to the plurality of green light-emitting layers may be arranged in the adjacent M+1th column with a predetermined gap spaced apart. In the same manner, the first electrodes 211 corresponding to the blue light-emitting layers and the red light-emitting layers may be arranged alternately in the adjacent M+2th column, and the first electrodes 211 corresponding to the plurality of green light-emitting layers may be arranged in the adjacent M+3th column with a predetermined gap spaced apart. For example, the plurality of first electrodes 211 may be repeatedly arranged on the substrate 110 to have the structure described above. However, exemplary embodiments of the inventive concept are not limited thereto.

[0088] Reference Figure 4 In an exemplary embodiment, the light emitting layer 212 is positioned on the first electrode 211. The light emitting layer 212 may be positioned in the first opening 195 of the partition wall 190 and overlap the first electrode 211 (eg, in a thickness direction of the substrate 110).

[0089] The light emitting layer 212 includes a light emitting material. In an exemplary embodiment, the light emitting material may be an organic material or an inorganic material such as a quantum dot. In addition, the light emitting layer 212 may include a host and a light emitting dopant. However, exemplary embodiments of the inventive concept are not limited thereto.

[0090] The second electrode 213 is positioned on the light emitting layer 212. The second electrode 213 may be a common electrode, and may be a cathode. In an exemplary embodiment, the second electrode 213 may be a transmissive electrode, a transflective electrode, or a reflective electrode.

[0091] In an exemplary embodiment, at least one of a hole injection layer (HIL) and a hole transport layer (HTL) may be further disposed between the first electrode 211 and the light emitting layer 212, and at least one of an electron transport layer (ETL) and an electron injection layer (EIL) may be further disposed between the light emitting layer 212 and the second electrode 213.

[0092] The thin film encapsulation layer 301 is disposed on the second electrode 213 to protect the light emitting diode 210. The thin film encapsulation layer 301 prevents external contaminants such as moisture or oxygen from penetrating into the light emitting diode 210.

[0093] In an exemplary embodiment, the thin film encapsulation layer 301 may include at least one inorganic film and at least one organic film 320. Figure 4In an exemplary embodiment, the thin film encapsulation layer 301 may include a first inorganic film 310 and a second inorganic film 330 and an organic film 320. For example, an upper surface of the organic film 320 may directly contact a lower surface of the second inorganic film 330, and a lower surface of the organic film 320 may directly contact an upper surface of the first inorganic film 310. However, exemplary embodiments of the inventive concept are not limited thereto.

[0094] In an exemplary embodiment, the first inorganic film 310 and the second inorganic film 330 include Al 2 O 3 、TiO 2 、ZrO、SiO 2 、AlON、AlN、SiON、Si 3 N 4 , ZnO and Ta 2 O 5 The organic film 320 may include one or more inorganic materials selected from the group consisting of: organic film 320, ...

[0095] The dense first inorganic film 310 and the second inorganic film 330 mainly inhibit the penetration of moisture or oxygen. Any moisture and oxygen that pass through the first inorganic film 310 and the second inorganic film 330 are blocked again by the organic film 320. In addition to inhibiting moisture penetration, the organic film 320 also serves as a buffer layer to reduce the stress between the films between the first inorganic film 310 and the second inorganic film 330. In addition, since the organic film 320 has a planarization property, the top surface of the thin film encapsulation layer 301 can be planarized by the organic film 320.

[0096] In an exemplary embodiment, the thin film encapsulation layer 301 may have a thickness of about 5 μm to about 50 μm. In embodiments where the thickness of the thin film encapsulation layer 301 is less than 5 μm or greater than 50 μm, the light emitting efficiency of the light emitting display device 1000 may be reduced.

[0097] The touch part TP is disposed on the display part DP including the substrate 110, the driving circuit part 130, the partition wall 190, the light emitting diode 210 and the thin film encapsulation layer 301. Figure 4 As shown in the exemplary embodiment of FIG. 1 , the bottom surface of the touch part TP may be directly disposed on the upper surface of the second inorganic film 330 of the thin film encapsulation layer 301 .

[0098] The first sensing electrode SE1 is positioned on the thin film encapsulation layer 301. In an exemplary embodiment, the first sensing electrode SE1 may include a metal or a transparent conductive oxide (TCO). For example, the transparent conductive oxide (TCO) may include at least one compound selected from indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotubes (CNTs), and graphene.

[0099] The first insulating layer 410 is positioned on the thin film encapsulation layer 301 on which the first sensing electrode SE1 is located. Figure 4 As shown in the exemplary embodiment of , the lower surface of the first insulating layer 410 may directly contact the upper surface of the second inorganic film 330 of the thin film encapsulation layer 301 and the side surface and the upper surface of the first sensing electrode SE1. In an exemplary embodiment, the first insulating layer 410 may include at least one of an inorganic film and an organic film. For example, the inorganic film may include at least one of a metal oxide, a metal oxynitride, silicon oxide, silicon nitride, and silicon oxynitride. The organic film may include a polymer-based material.

[0100] The second sensing electrode SE2 is positioned on the first insulating layer 410. In an exemplary embodiment, the second sensing electrode SE2 may include a metal or a transparent conductive oxide (TCO). For example, the transparent conductive oxide (TCO) may include at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotubes (CNT), and graphene. However, exemplary embodiments of the inventive concept are not limited thereto.

[0101] Although the touch portion TP according to the exemplary embodiment of the inventive concept is described as including the first sensing electrode SE1 and the second sensing electrode SE2 arranged on different layers, the exemplary embodiment of the touch portion TP is not limited thereto. For example, in another exemplary embodiment, the touch portion TP may include the first sensing electrode SE1 and the second sensing electrode SE2 arranged on the same layer and connected to each other by using a bridge electrode.

[0102] The second insulating layer 420 is positioned on the first insulating layer 410 on which the second sensing electrode SE2 is arranged. Figure 4 As shown in the exemplary embodiment of , the lower surface of the second insulating layer 420 may directly contact the upper surface of the first insulating layer 410 and the side and upper surfaces of the second sensing electrode SE2. In the exemplary embodiment, the second insulating layer 420 may include at least one of an organic film and an inorganic film.

[0103] The low-refractive layer 450 is positioned on the second insulating layer 420. For example, Figure 4As shown in the exemplary embodiment of the present invention, the lower surface of the low refractive layer 450 may directly contact the upper surface of the second insulating layer 420. In the exemplary embodiment, the low refractive layer 450 may include a light-transmitting organic material having a low refractive index. For example, in the exemplary embodiment, the low refractive layer 450 may include an organic material selected from acrylic resin, polyimide resin, polyamide resin, and Alq. 3 At least one material selected from [tris(8-hydroxyquinoline)aluminum]. However, exemplary embodiments of the present inventive concept are not limited thereto.

[0104] The low-refractive layer 450 has a relatively smaller refractive index than the later-described high-refractive layer 470. For example, the low-refractive layer 450 may have a refractive index of about 1.40 to about 1.59.

[0105] The low-refractive layer 450 includes a second opening 455. The second opening 455 overlaps the first opening 195 (eg, in the thickness direction of the substrate 110).

[0106] In a plan view (eg, in a direction parallel to the upper surface of the substrate 110), the edge of the second opening 455 has a shape similar to that of the first opening 195. The edge of the second opening 455 is defined as a boundary where the low refractive layer 450 contacts the second insulating layer 420.

[0107] In addition, in a plan view, the size of the second opening 455 (eg, the length in a direction parallel to the upper surface of the substrate 110) is greater than that of the first opening 195. This will be described in further detail later.

[0108] In this specification, the gap G between the second opening 455 and the first opening 195 is measured based on the edges thereof. Figure 4 In the exemplary embodiment shown in FIG. 1 , the distance between the edge of the first opening 195 and the edge of the second opening 455 (e.g., in a direction parallel to the upper surface of the substrate 110) is a gap G. The gap G between the second opening 455 and the first opening 195 may be the shortest distance in a direction parallel to the upper surface of the substrate at the edges of the two openings.

[0109] The high refractive layer 470 is positioned on the second insulating layer 420 and the low refractive layer 450. Figure 4 As shown in the exemplary embodiment of , the lower surface of the high refractive layer 470 may directly contact the upper surfaces of the second insulating layer 420 and the low refractive layer 450. In an exemplary embodiment, the high refractive layer 470 may include a light-transmitting organic material having a high refractive index. The high refractive layer 470 has a relatively larger refractive index than the low refractive layer 450. For example, in an exemplary embodiment, the high refractive layer 470 may have a refractive index of about 1.60 to about 1.80.

[0110] The high refractive layer 470 may be located in the second opening 455 of the low refractive layer 450. Further, the high refractive layer 470 may be located to overlap the second opening 455 of the low refractive layer 450 and an upper portion of the low refractive layer 450 (eg, in the thickness direction of the substrate 110).

[0111] In addition, in an exemplary embodiment, the light-emitting display device 1000 may further include a polarizer, an adhesive layer, and a window disposed on the touch part TP.

[0112] The touch portion TP according to an exemplary embodiment of the inventive concept includes a low-refractive layer 450 having a second opening 455 and a high-refractive layer 470 positioned in the second opening 455 of the low-refractive layer 450. Therefore, the front visibility and light output efficiency of the light-emitting display device 1000 can be improved. For example, according to the difference in refractive index between the low-refractive layer 450 and the high-refractive layer 470, at least some of the light generated by the light-emitting diode 210 is reflected at the interface between the low-refractive layer 450 and the high-refractive layer 470. Therefore, as will be referred to Figure 6 As described in detail, light can be focused on the front side.

[0113] Figure 6 A cross-sectional view of a light emitting display device for explaining reflection of light at an interface between a low refraction layer and a high refraction layer according to an exemplary embodiment of the inventive concept is illustrated. Figure 6 , the light L generated by the light emitting layer 212 may be incident on the touch part TP obliquely. In this embodiment, at least some of the light L incident on the high refractive layer 470 of the touch part TP is reflected at the interface between the low refractive layer 450 and the high refractive layer 470. Specifically, as Figure 6 As shown in , when the incident angle of the light L incident on the high refractive layer 470 is greater than the critical angle, the incident light L may be totally reflected at the interface between the low refractive layer 450 and the high refractive layer 470. For example, when the light L incident on the high refractive layer 470 having a relatively large refractive index travels toward the low refractive layer 450 having a relatively small refractive index, the total reflection of the light L may occur at the interface between the low refractive layer 450 and the high refractive layer 470.

[0114] In this case, the interface between the low-refractive layer 450 and the high-refractive layer 470 forms an angle of about 40° to about 70° with a line parallel to the upper surface of the substrate 110. The interface between the low-refractive layer 450 and the high-refractive layer 470 may be an outer side surface of the low-refractive layer 450 including the second opening 455 (e.g., an outer side surface of the low-refractive layer 450 extending from an edge of the second opening 455 to the uppermost surface of the low-refractive layer 450). For example, in a cross-sectional view, the outer side surface of the low-refractive layer 450 may form an angle of about 40° to about 70° with the second insulating layer 420 on which the low-refractive layer 450 is located.

[0115] In the case where the angle between the outer surface of the low-refractive layer 450 and the line parallel to the upper surface of the substrate 110 is less than 40°, the light L may not be incident on the interface between the low-refractive layer 450 and the high-refractive layer 470, and thus total reflection may not occur. In contrast, when the angle between the outer surface of the low-refractive layer 450 and the line parallel to the upper surface of the substrate 110 is greater than 70°, the light L totally reflected at the interface between the low-refractive layer 450 and the high-refractive layer 470 may not be emitted to the front of the light-emitting display device 1000. Figure 6 In an exemplary embodiment of the present invention, substantially the entire outer side surface of the low-refractive layer 450 is shown to form an angle of about 40° to about 70° with the second insulating layer 420, but in other exemplary embodiments, a portion of the outer side surface of the low-refractive layer 450 may have the angle.

[0116] According to an exemplary embodiment of the inventive concept, the interface between the low-refractive layer 450 and the high-refractive layer 470 forms an angle of about 40° to about 70° with a line parallel to the upper surface of the substrate 110. Therefore, the light L incident on the interface between the low-refractive layer 450 and the high-refractive layer 470 may be totally reflected. Therefore, the light L may be focused on the front surface of the light-emitting display device 1000, and therefore, the front visibility and light-emitting efficiency of the light-emitting display device 1000 may be improved.

[0117] In addition, the first opening 195 according to an exemplary embodiment of the inventive concept has a size (e.g., a length in a direction parallel to the upper surface of the substrate 110) smaller than that of the second opening 455 in a plan view. In an exemplary embodiment, a gap G between the first opening 195 and the second opening 455 in a plan view (e.g., in a direction parallel to the upper surface of the substrate 110) may be about 0.1 μm to about 2.0 μm. In addition, in an exemplary embodiment, a gap G between an edge of the first opening 195 and an edge of the second opening 455 may always be constant regardless of its direction.

[0118] In addition, in an exemplary embodiment of the inventive concept, the display device 1000 may include pixels having different gaps G between the first opening 195 and the second opening 455. For example, the first plurality of pixels may have the first gap G1, and the second plurality of pixels may have the second gap G2. In an exemplary embodiment, the number of the first plurality of pixels having the first gap G1 and the number of the second plurality of pixels having the second gap G2 may be the same and may include all pixels in the display device 1000.

[0119] In an exemplary embodiment, the difference between the first gap G1 and the second gap G2 may be in the range of about 0.2 μm to about 2 μm. In this way, efficiency dispersion of the display device 1000 may be mitigated by providing two gaps of each pixel of the display device 1000 .

[0120] Figure 7 FIG. 1 shows a pixel having a first gap G1 and a pixel having a second gap G2 according to an embodiment of the present invention. Figure 7 In the exemplary embodiment, adjacent pixels respectively have the first gap G1 and the second gap G2 different from each other.

[0121] The gap between the first opening 195 and the second opening 455 in one pixel is always constant regardless of the direction. Figure 7 In the pixel shown on the left side of FIG. 1 , the first gap G1 is substantially the same between the first opening 195 and the second opening 455 in portions of the first gap G1 extending in the first direction D1, the second direction D2, the third direction D3, and the fourth direction D4, respectively.

[0122] However, if Figure 7 As shown in FIG. 1 , some of the plurality of pixels may have a first gap G1 for the length of the gap between the first opening 195 and the second opening 455, and other pixels of the plurality of pixels may have a second gap G2 for the length of the gap between the first opening 195 and the second opening 455. The first gap G1 is smaller than the second gap G2. By mixing and arranging pixels having different gaps G as described above, the luminous efficiency dispersion of the display device 1000 may be mitigated.

[0123] In an exemplary embodiment, pixels having the first gap G1 and the second gap G2 may emit light of the same color. For example, among a plurality of pixels emitting light of the same color, some pixels may have the first gap G1, and other pixels may have the second gap G2.

[0124] For example, some of the red pixels may have a first gap G1, while other of the red pixels may have a second gap G2. Similarly, some of the green pixels may have a first gap G1, while other of the green pixels may have a second gap G2, and some of the blue pixels may have a first gap G1, while other of the blue pixels may have a second gap G2.

[0125] Figure 8 A graph showing efficiency dispersion of the display devices according to the first comparative embodiment and the second comparative embodiment is illustrated. Fig. 9 Illustrated are a plan view of a pixel having a first gap and a pixel having a second gap, and a graph showing a front efficiency ratio according to a gap size between a second opening of a low-refractive layer and a first opening of a partition wall. Fig.10 A graph showing efficiency dispersion of display devices according to a second comparative embodiment and a third embodiment of an exemplary embodiment of the inventive concept is illustrated.

[0126] exist Figures 8 to 10 , Example 1 is a comparative embodiment of a display device in which the low-refractive layer does not include a second opening and does not include a high-refractive layer, and Example 2 is a comparative embodiment of a display device in which the low-refractive layer includes a second opening and the gap is the same in all pixels. Example 3 is based on Figure 1 The display device 1000 of the exemplary embodiment is a display device in which the low-refractive layer includes a second opening and both pixels having a first gap and pixels having a second gap exist.

[0127] Figure 8 Example 1 is a comparative example of a display device that does not include a total reflection structure at the interface between the low refractive layer 450 and the high refractive layer 470. For example, in the comparative example of Example 1, there is no total reflection at the interface between the low refractive layer and the high refractive layer. Example 2 is a comparative example of a display device that includes a total reflection structure at the interface between the low refractive layer 450 and the high refractive layer 470 and has gaps of the same size (e.g., length in a direction parallel to the upper surface of the substrate). Example 3 is a display device 1000 according to an exemplary embodiment of the present invention concept that includes a total reflection structure at the interface between the low refractive layer 450 and the high refractive layer 470 and has two different gaps (total reflection, multiple gaps).

[0128] Reference Figure 8 , it can be seen that Example 2 having a total reflection structure has improved efficiency compared to Example 1 without a total reflection structure. Figure 8 , it can be seen that in Example 2, the efficiency is improved, but each efficiency spread is widened. Figure 8As shown in , the standard deviation of Example 1 is about 0.85, but the standard deviation of Example 2 increases to about 1.8.

[0129] That is, even if the gap is designed to be the same in all pixels, the gap between the second opening 455 of the low-refractive layer 450 and the first opening 195 of the partition wall 190 may vary, for example, due to an alignment error of a mask in a manufacturing process. Thus, the gap varies due to deviations in the manufacturing process, and as Figure 8 As shown in , this process variation leads to increased efficiency spread.

[0130] Therefore, in the display device 1000 according to an exemplary embodiment of the inventive concept, the gaps of the respective pixels are specially designed to have different values ​​in the manufacturing process, namely, including the first gap G1 and the second gap G2. This can alleviate efficiency dispersion.

[0131] Fig. 9 The principle of efficiency dispersion mitigation when gaps are designed to have different sizes (eg, including a first gap G1 and a second gap G2 ) is shown, and a front efficiency ratio according to the gaps is illustrated.

[0132] Reference Fig. 9 , the graph shows that when the gap between the second opening 455 of the low-refractive layer 450 and the first opening 195 of the partition wall 190 is 1.5 μm, the efficiency is maximum. For example, the front efficiency ratio with the reference comparison value is equal to about 1.15. In this case, the gap at which the efficiency becomes maximum is defined as the central gap G0. Figure 8 As shown in , when all gaps are equally formed to be 1.5 μm, the efficiency spread may be widened due to process errors.

[0133] However, if Fig. 9 As shown in , when some pixels are formed to have a gap of 1.0 μm ( G1 = G0 - 0.5 μm) and some pixels are formed to have a gap of 2.0 μm ( G2 = G0 + 0.5 μm), the efficiency spread can be alleviated.

[0134] Due to an alignment error during the manufacturing process thereof, the gap between the second opening 455 and the first opening 195 may be formed to be smaller than the designed value as a whole. In this embodiment, when the actual gap of the pixel whose designed gap (first gap G1) is 1.0 μm becomes narrower than the designed value, the front light emitting efficiency is reduced as shown in FIG. Fig. 9 That is, when the gap is narrowed due to process errors, the efficiency of the pixel designed with the first gap G1 (1.0 μm) is reduced.

[0135] However, at the same time, when the gap of the pixel designed with the second gap G2 (2.0 μm) is narrowed due to process errors, although the gap is smaller than the designed value, the front light emitting efficiency is improved. Fig. 9 Indicated by an upward arrow.

[0136] For example, even if the gap is smaller (e.g., narrower) than the design value due to process errors, the improved efficiency in the pixel having the second gap G2 compensates for the reduced efficiency in the pixel having the first gap G1, thereby offsetting the deviation in efficiency. Therefore, the efficiency dispersion of the display device 1000 can be reduced as a whole. Fig. 9 The diagram illustrates a case where the gap is formed narrow due to a process error. However, in an exemplary embodiment where the gap is formed larger (eg, wider), the efficiency can be increased by 1.1% compared to the example embodiment. Fig. 9 For example, when the first gap G1 is formed to be larger than the design value so that the efficiency is improved, the second gap G2 is formed to be wider than the design value so that the efficiency is correspondingly reduced. Therefore, the reduced efficiency compensates for the improved efficiency. In the embodiment in which the gap is formed to be larger than the design value, the front light emitting efficiency is in the same Fig. 9 Move in the direction opposite to the arrow shown in .

[0137] Fig.10 The efficiency distribution of the display devices according to the second comparative example and the third example is illustrated. Example 2 is a display device in which all gaps have the same design value of 1.3 μm in all pixels, and Example 3 is a display device according to Figure 1 A display device 1000 of an exemplary embodiment includes pixels having a first gap G1 (0.8 μm) and pixels having a second gap G2 (1.8 μm).

[0138] Reference Fig.10 , the graph shows that the standard deviation of Example 3 is reduced compared to the standard deviation of Example 2. For example, the standard deviation of Example 2 is illustrated as 5.389, but it can be confirmed that the standard deviation of Example 3 is reduced to 4.744. Example 3 has a slightly reduced efficiency compared to Example 2 (115.9 compared to 113.6), but this reduction in efficiency is slight and not noticeable.

[0139] Fig.11 A display device according to another exemplary embodiment is illustrated. Figure 1 The area in the same plane as the area in the figure. Figure 1 In the exemplary embodiment of , the difference between the first gap G1 and the second gap G2 is 1.0 μm. Fig.11In an exemplary embodiment of the present invention, the difference between the first gap G1 and the second gap G2 may be 0.2 μm. For example, with respect to the center value G0 of the first gap G1 and the second gap G2, the first gap G1 may have a value of (G0-0.1) μm, and the second gap G2 may have a value of (G0+0.1) μm. However, even in Fig.11 In an exemplary embodiment of Figure 1 and Fig. 9 The exemplary embodiments of the present invention employ the same principles to mitigate efficiency spread.

[0140] Fig.12 A display device according to another exemplary embodiment is illustrated. Figure 1 The area in the same plane as the area in the figure. Figure 1 In the exemplary embodiment of , the difference between the first gap G1 and the second gap G2 is 1.0 μm. Fig.12 In an exemplary embodiment of the present invention, the difference between the first gap G1 and the second gap G2 may be 2.0 μm. For example, with respect to the center value G0 of the first gap G1 and the second gap G2, the first gap G1 may have a value of (G0-1.0) μm, and the second gap G2 may have a value of (G0+1.0) μm. However, even in Fig.12 In the exemplary embodiment shown in Figure 1 and Fig. 9 The exemplary embodiments of the present invention employ the same principles to mitigate efficiency spread.

[0141] Fig.13 A display device according to another exemplary embodiment is illustrated. Figure 1 The area in the same plane as the area in the figure. Fig.13 In the exemplary embodiment of the present invention, the display device 1000 is provided with four gaps instead of two gaps. Figure 1 For example, in accordance with Fig.13 In the display device 1000 of the exemplary embodiment of the present invention, pixels having a 1.0 μm difference between the first gap G1 and the second gap G2 and pixels having a 0.2 μm difference between the third gap G3 and the fourth gap G4 may be mixed. However, the exemplary embodiments of the present inventive concept are not limited thereto. For example, in other exemplary embodiments, the difference between the first gap G1 and the second gap G2 and the difference between the third gap G3 and the fourth gap G4 may be selected differently.

[0142] In an exemplary embodiment, the number of the first plurality of pixels having the first gap G1 and the number of the second plurality of pixels having the second gap G2 are the same, and the number of the third plurality of pixels having the third gap G3 and the number of the fourth plurality of pixels having the fourth gap G4 are the same. However, even in Fig.13 In an exemplary embodiment of Figure 1 As in the exemplary embodiment of FIG. 1 , the pixel having the second gap G2 also compensates for the efficiency deviation caused by the alignment error of the pixel having the first gap G1, and the pixel having the fourth gap G4 also compensates for the efficiency deviation caused by the alignment error of the pixel having the third gap G3. Therefore, the efficiency deviation can be reduced.

[0143] exist Fig.13 In the exemplary embodiment shown in , average values ​​of the first gap G1 , the second gap G2 , the third gap G3 , and the fourth gap G4 may be the same.

[0144] For example, based on a specific average value (C), the first gap G1 may be (C-0.5) μm, the second gap G2 may be (C+0.5) μm, the third gap G3 may be (C-0.1) μm, and the fourth gap G4 may be (C+0.1) μm.

[0145] although Fig.13 A configuration in which the number of gaps is four is illustrated, but the number of gaps may be greater than four.

[0146] Fig.14 A display device according to another exemplary embodiment is illustrated. Figure 1 The same area as in . Fig.14 The display device 1000 is similar to the exemplary embodiment shown in FIG. 1 , except that six gaps are provided instead of four gaps. Fig.13 The exemplary embodiments are the same.

[0147] For example, according to Fig.14 In the display device 1000 of the exemplary embodiment of the present invention, a pixel having a difference of 1.0 μm between the first gap G1 and the second gap G2, a pixel having a difference of 2.0 μm between the third gap G3 and the fourth gap G4, and a pixel having a difference of 0.2 μm between the fifth gap G5 and the sixth gap G6 may be mixed. However, the exemplary embodiments of the present inventive concept are not limited thereto. For example, the difference between the first gap G1 and the second gap G2, the difference between the third gap G3 and the fourth gap G4, and the difference between the fifth gap G5 and the sixth gap G6 may be selected differently.

[0148] exist Fig.14In the exemplary embodiment shown in , the number of the first plurality of pixels having the first gap G1 is the same as the number of the second plurality of pixels having the second gap G2, the number of the third plurality of pixels having the third gap G3 is the same as the number of the fourth plurality of pixels having the fourth gap G4, and the number of the fifth plurality of pixels having the fifth gap G5 is the same as the number of the sixth plurality of pixels having the sixth gap G6.

[0149] However, even in Fig.14 In the exemplary embodiment shown in Fig.13 As shown in , the pixel having the second gap G2 also compensates for the efficiency deviation caused by the alignment error of the pixel having the first gap G1, the pixel having the fourth gap G4 also compensates for the efficiency deviation caused by the alignment error of the pixel having the third gap G3, and the pixel having the sixth gap G6 also compensates for the efficiency deviation caused by the alignment error of the pixel having the fifth gap G5. Therefore, the efficiency deviation can be reduced.

[0150] exist Fig.14 In the exemplary embodiment shown in , an average value of the first gap G1 and the second gap G2 , an average value of the third gap G3 and the fourth gap G4 , and an average value of the fifth gap G5 and the sixth gap G6 may be the same.

[0151] For example, based on a specific average value (C), the first gap G1 may be (C-0.5) μm, the second gap G2 may be (C+0.5) μm, the third gap G3 may be (C-0.1) μm, the fourth gap G4 may be (C+0.1) μm, the fifth gap G5 may be (C-1.0) μm, and the sixth gap G6 may be (C+1.0) μm.

[0152] Fig.15 A display device according to another exemplary embodiment is illustrated. Figure 1 In addition to the three gaps of the first gap G1, the second gap G2 and the center gap G0 included therein, according to Fig.15 The display device 1000 of the exemplary embodiment is Fig.13 The detailed description of the same components will be omitted. Fig.15 In , the center gap G0 is the average value of the first gap G1 and the second gap G2. For example, pixels having a first gap G1 (Xa) that decreases (a) based on the center gap G0 (X) and pixels having a second gap G2 (X+a) that increases (a) based on the center gap G0 (X) may be included. Fig.15In an exemplary embodiment, the number of pixels having the first gap G1 and the number of pixels having the second gap G2 are the same. The central gap G0 may range from about 0.5 μm to about 5.0 μm, and the value of (a) may be about 0.1 μm to 1.0 μm.

[0153] When pixels having the first gap G1, the second gap G2, and the center gap G0 which is the average value of the first gap G1 and the second gap G2 are mixed, the efficiency dispersion can be reduced without greatly reducing the front light emitting efficiency. Fig. 9 , a pixel with a gap of 1.5 μm, a pixel with a gap of 1.0 μm, and a pixel with a gap of 2.0 μm can be mixed. In this embodiment, the average efficiency of the pixels with three gaps increases, and the pixel with a gap of 1.0 μm and the pixel with a gap of 2.0 μm compensate for the efficiency deviation caused by the process error. Therefore, the efficiency dispersion can be alleviated.

[0154] Fig.16 A display device according to another exemplary embodiment of the present inventive concept is illustrated. Figure 1 In addition to the five gaps of the first gap G1, the second gap G2, the third gap G3, the fourth gap G4 and the center gap G0 included therein, according to Fig.16 The display device 1000 of the exemplary embodiment is Figure 1 The exemplary embodiments are the same.

[0155] Fig.16 The central gap G0 in the exemplary embodiment is an average value of the first gap G1 and the second gap G2, and is an average value of the third gap G3 and the fourth gap G4. For example, a pixel having a first gap G1 (Xa) reduced by (a) based on the central gap G0 (X) and a pixel having a second gap G2 (X+a) increased by (a) are included, and a pixel having a third gap G3 (Xb) reduced by (b) based on the central gap G0 (X) and a pixel having a fourth gap G4 (X+b) increased by (b) are included.

[0156] In this embodiment, the number of the first plurality of pixels having the first gap G1 is the same as the number of the second plurality of pixels having the second gap G2, and the number of the third plurality of pixels having the third gap G3 is the same as the number of the fourth plurality of pixels having the fourth gap G4.

[0157] The center gap G0(X) may range from about 0.5 μm to about 5.0 μm, and the value of (a) may range from about 0.1 μm to about 1.0 μm. The value of (b) may range from about 0.1 μm to about 1.0 μm. The values ​​of (a) and (b) may not be the same. However, even in Fig.16 In an exemplary embodiment of Fig.15 The same principle as in is used to reduce efficiency spread without significantly reducing the front luminous efficiency.

[0158] Fig.17 A display device according to another exemplary embodiment of the present inventive concept is illustrated. Figure 1 In addition to the seven gaps of the first gap G1, the second gap G2, the third gap G3, the fourth gap G4, the fifth gap G5, the sixth gap G6 and the center gap G0 included therein, according to Fig.17 The display device 1000 of the exemplary embodiment is Figure 1 The exemplary embodiments are the same.

[0159] exist Fig.17 , the central gap G0 is an average value of the first gap G1 and the second gap G2, an average value of the third gap G3 and the fourth gap G4, and an average value of the fifth gap G5 and the sixth gap G6.

[0160] For example, the display device 1000 includes a pixel having a first gap G1 (Xa) that is reduced (a) based on the center gap G0 (X) and a pixel having a second gap G2 (X+a) that is increased (a), a pixel having a third gap G3 (Xb) that is reduced (b) based on the center gap G0 (X) and a pixel having a fourth gap G4 (X+b) that is increased (b), and a pixel having a fifth gap G5 (Xc) that is reduced (c) based on the center gap G0 (X) and a pixel having a sixth gap G6 (X+c) that is increased (c).

[0161] In this embodiment, the number of the first plurality of pixels having the first gap G1 is the same as the number of the second plurality of pixels having the second gap G2, the number of the third plurality of pixels having the third gap G3 is the same as the number of the fourth plurality of pixels having the fourth gap G4, and the number of the fifth plurality of pixels having the fifth gap G5 is the same as the number of the sixth plurality of pixels having the sixth gap G6.

[0162] In an exemplary embodiment, the center gap G0(X) may range from about 0.5 μm to about 5.0 μm, the value of (a) may range from about 0.1 μm to about 1.0 μm, the value of (b) may range from about 0.1 μm to about 1.0 μm, and the value of (c) may range from about 0.1 μm to about 1.0 μm. The values ​​of (a), (b), and (c) may not be the same. However, even in Fig.17 In an exemplary embodiment of Fig.15 The same principles as in the exemplary embodiments of the present invention are used to mitigate efficiency spread without significantly reducing the front light emitting efficiency.

[0163] While the invention has been described in conjunction with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but on the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A display device, comprising: substrate; and a plurality of pixels positioned on the substrate, Each pixel consists of: The first electrode, a partition wall including a first opening overlapping the first electrode, and a low-refractive layer, comprising a second opening overlapping the first opening, Wherein, the plurality of pixels include: a first plurality of pixels having a first gap between an edge of the first opening and an edge of the second opening in a direction parallel to an upper surface of the substrate, a second plurality of pixels having a second gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, the first gap and the second gap having different lengths from each other in the direction parallel to the upper surface of the substrate, and Wherein at least one of the first plurality of pixels and at least one of the second plurality of pixels emit light of the same color as each other.

2. The display device according to claim 1, wherein A total number of the first plurality of pixels having the first gap is the same as a total number of the second plurality of pixels having the second gap. 3 . The display device according to claim 1 , wherein the lengths of the first gap and the second gap are in a range of 0.1 μm to 2 μm. 4 . The display device according to claim 1 , wherein in each of the plurality of pixels, a distance between the edge of the first opening and the edge of the second opening in all directions parallel to the upper surface of the substrate is the same. 5 . The display device according to claim 1 , wherein in the direction parallel to the upper surface of the substrate, a length of the first opening is smaller than a length of the second opening.

6. The display device according to claim 1, wherein the plurality of pixels further comprises: a third plurality of pixels having a third gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, and a fourth plurality of pixels having a fourth gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, and The third gap and the fourth gap have different lengths from each other in the direction parallel to the upper surface of the substrate. 7 . The display device according to claim 6 , wherein an average value of the lengths of the third gap and the fourth gap is the same as an average value of the lengths of the first gap and the second gap.

8. The display device according to claim 6, wherein the plurality of pixels further comprises: a fifth plurality of pixels having a fifth gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, and a sixth plurality of pixels having a sixth gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, and The fifth gap and the sixth gap have different lengths from each other in the direction parallel to the upper surface of the substrate.

9. The display device according to claim 8, wherein An average value of the lengths of the fifth gap and the sixth gap, an average value of the lengths of the third gap and the fourth gap, and an average value of the lengths of the first gap and the second gap are the same.

10. A display device, comprising: substrate; as well as a plurality of pixels positioned on the substrate, Each pixel consists of: The first electrode, a partition wall comprising a first opening overlapping the first electrode, a low-refractive layer, comprising a second opening overlapping the first opening, and a high refractive layer positioned in the second opening, and The plurality of pixels include: a first plurality of pixels having a first gap between an edge of the first opening and an edge of the second opening in a direction parallel to an upper surface of the substrate, a second plurality of pixels having a second gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, the second gap having a length different from that of the first gap, and A third plurality of pixels has a third gap between an edge of the first opening and an edge of the second opening in the direction parallel to the upper surface of the substrate, the third gap having a length equal to an average of the lengths of the first gap and the second gap.

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