Display device

Abstract

A display device according to an example of the present specification may include a substrate having a plurality of sub-pixels disposed on the substrate; a plurality of transistors disposed in the plurality of sub-pixels on the substrate, respectively; and a plurality of first electrodes respectively disposed on the plurality of transistors and connected to the plurality of transistors. Each first electrode includes a reflective layer and a transparent conductive layer disposed on the reflective layer. The display device may further include a plurality of light emitting portions disposed on the plurality of first electrodes, respectively; and a second electrode disposed on the light emitting portion. The transparent conductive layer includes a first portion configured to abut the reflective layer and a second portion spaced apart from the reflective layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0126895 filed on September 22, 2023 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device, and more particularly to a display device capable of improving light emission efficiency and display quality. Background Art

[0004] Unlike liquid crystal display devices, organic light emitting display devices do not require a separate light source and can therefore be manufactured as light-weight, thin display devices. In addition, organic light emitting display devices are advantageous in terms of power consumption because they operate at a low voltage. Furthermore, since organic light emitting display devices are excellent in terms of color realization, response speed, viewing angle, and contrast ratio (CR), organic light emitting display devices are being studied as next generation display devices.

[0005] An organic light-emitting display device can be called a self-luminous display device. An organic light-emitting display device can display images using an organic light-emitting element. The organic light-emitting element injects electrons and holes into a light-emitting layer from a cathode for injecting electrons and an anode for injecting holes, and emits light when excitons generated by coupling the injected electrons and holes drop from an excited state to a ground state.

[0006] Organic light emitting display devices can be classified into top emission type display devices, bottom emission type display devices, and dual emission type display devices depending on the direction of emitting light. Organic light emitting display devices can be classified into passive matrix type display devices and active matrix type display devices depending on the operation method. Summary of the invention

[0007] An object to be achieved by aspects of the present disclosure is to provide a high-efficiency, low-power display device with improved light-emitting efficiency.

[0008] Another object to be achieved by aspects of the present disclosure is to provide a display device capable of improving display quality by minimizing luminance degradation and color coordinate variation according to viewing angles.

[0009] The objects of the present disclosure are not limited to the above-mentioned objects, and other objects not mentioned above can be clearly understood by those skilled in the art from the following description.

[0010] A display device according to an embodiment of the present disclosure may include: a substrate on which a plurality of sub-pixels are arranged; a plurality of transistors, which are respectively arranged in the plurality of sub-pixels on the substrate; a plurality of first electrodes, which are respectively arranged on the plurality of transistors, connected to the plurality of transistors, and each include a reflective layer and a transparent conductive layer arranged on the reflective layer; a plurality of light-emitting parts, which are respectively arranged on the plurality of first electrodes; and a second electrode, which is arranged on the light-emitting part, wherein the transparent conductive layer includes a first portion configured to be adjacent to the reflective layer and a second portion spaced apart from the reflective layer, and wherein a microcavity spacing of light emitted from the light-emitting part adjacent to the first portion of the transparent conductive layer is different from a microcavity spacing of light emitted from the light-emitting part adjacent to the second portion of the transparent conductive layer.

[0011] A display device according to another embodiment of the present disclosure may include: a plurality of sub-pixels; a plurality of transistors, which are respectively arranged in the plurality of sub-pixels; a plurality of first electrodes, which are respectively arranged on the plurality of transistors, connected to the plurality of transistors, and each include a reflective layer and a transparent conductive layer arranged on the reflective layer; a plurality of light-emitting portions, which are respectively arranged on the plurality of first electrodes; and a second electrode, which is arranged on the plurality of light-emitting portions, wherein the transparent conductive layer includes a first portion configured to be adjacent to the reflective layer, and a second portion spaced apart from the reflective layer, wherein light emitted from the light-emitting portion adjacent to the first portion of the transparent conductive layer is amplified by a first microcavity spacing, and light emitted from the light-emitting portion adjacent to the second portion of the transparent conductive layer is amplified by a second microcavity spacing, and wherein a portion of light emitted from one of the plurality of sub-pixels is configured to increase light intensity at a central viewing angle, and another portion of light emitted from one of the sub-pixels is configured to minimize light intensity variation as viewing angle changes.

[0012] Additional details of exemplary embodiments of the disclosure are included in the detailed description and the accompanying drawings.

[0013] According to the effects of the present disclosure, it is possible to improve the light emission efficiency of a display device by enhancing the intensity of light emitted from a sub-pixel.

[0014] According to the effects of the present disclosure, it is possible to suppress brightness degradation and color coordinate variation according to a viewing angle by minimizing light intensity variation according to a viewing angle variation.

[0015] Effects according to aspects of the present disclosure are not limited to those discussed herein, and more various effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a top plan view of a display device according to an embodiment of the present disclosure;

[0018] Figure 2 is along Figure 1 A cross-sectional view taken along line II-II';

[0019] Figure 3 is a graph showing light intensity with respect to viewing angles in a first portion and a second portion of a display device according to an embodiment of the present disclosure;

[0020] Figure 4A is a cross-sectional view of a display device according to another embodiment of the present disclosure;

[0021] Figure 4B yes Figure 4A An enlarged view of region IVb in FIG.

[0022] Figure 5 is a cross-sectional view of a display device according to still another embodiment of the present disclosure; and

[0023] Figure 6 is a cross-sectional view of a display device according to still another embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] By referring to the exemplary embodiments described in detail below in conjunction with the accompanying drawings, the advantages and features of the present disclosure and the methods for achieving these advantages and features will be clear. However, the present disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. The exemplary embodiments are provided only by way of example so that those skilled in the art can fully understand the disclosure of the present disclosure and the scope of the present disclosure.

[0025] The shapes, sizes, ratios, angles, numbers, etc. shown in the drawings for describing the exemplary embodiments of the present disclosure are merely examples, and the present disclosure is not limited thereto. Throughout the disclosure, similar reference numerals generally represent similar elements.

[0026] In addition, in the following description of the present disclosure, detailed descriptions of known related technologies can be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Terms such as "including", "having", "comprising" used herein are generally intended to allow the addition of other components unless these terms are used together with the term "only". Unless otherwise expressly stated, any reference to the singular can include the plural.

[0027] Even if not explicitly stated, the components are interpreted as including the ordinary error range.

[0028] When terms such as "on", "over", "below", and "adjacent" are used to describe the positional relationship between two parts, unless these terms are used together with the terms "immediately" or "directly", one or more parts can be located between the two parts.

[0029] When an element or layer is disposed “on” another element or layer, the other layer or element can be directly on the other element or interposed therebetween.

[0030] Although the terms "first", "second", etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another component and do not limit the order or sequence. Therefore, the first component to be mentioned below can be the second component in the technical concept of the present disclosure.

[0031] Like reference numbers generally refer to like elements throughout the disclosure.

[0032] The size and thickness of each component shown in the drawings are illustrated for convenience of description, and the present disclosure is not limited to the size and thickness of the components shown.

[0033] The features of the various embodiments of the present disclosure can be partially or completely attached or combined with each other and can be interlocked and operated in technically different ways, and the embodiments can be performed independently of each other or in association with each other.

[0034] Furthermore, the term "can" fully encompasses the full meaning and coverage of the term "may."

[0035] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. All components of each display device according to all embodiments of the present disclosure are operatively coupled and configured.

[0036] Figure 1 is a top plan view of an organic light emitting display device according to an embodiment of the present disclosure. Figure 2 is along Figure 1 A cross-sectional view taken along line II-II'.

[0037] Reference Figure 1 and Figure 2 , the display device 100 includes a lower substrate 110 , a transistor 120 , an organic light emitting element 140 and an upper substrate 150 .

[0038] Reference Figure 1The lower substrate 110 is configured to support and protect several components of the display device 100. The lower substrate 110 can be made of a flexible plastic material. In addition, the lower substrate 110 can be made of an insulating material with transparency. For example, the lower substrate 110 can be made of transparent polyimide (PI).

[0039] The lower substrate 110 includes a display area AA (or an active area) and a non-display area NA (or a non-active area). The non-display area NA can completely or only partially surround the display area AA.

[0040] The display area AA can be disposed at the center portion of the lower substrate 110. The display area AA can be an area in the display device 100 that displays an image. Various display elements and various driving elements for operating the display elements can be disposed in the display area AA. For example, the display element can be configured as an organic light emitting element 140 including first electrodes 141-1, 141-2, and 141-3, a light emitting portion 142, and a second electrode 143. In addition, various driving elements configured to operate the display element, such as transistors, capacitors, wires, etc., can be disposed in the display area AA.

[0041] A plurality of sub-pixels SP can be arranged in the display area AA. Each of the plurality of sub-pixels SP can be an area where a plurality of gate lines arranged along a first direction and a plurality of data lines arranged along a second direction different from the first direction intersect each other. In this case, the first direction can be based on Figure 1 The horizontal direction, and the second direction can be based on Figure 1 The plurality of sub-pixels SP may include a plurality of first sub-pixels SP1, a plurality of second sub-pixels SP2, and a plurality of third sub-pixels SP3 that emit light beams having different colors. For example, the plurality of first sub-pixels SP1 may be red sub-pixels, the plurality of second sub-pixels SP2 may be green sub-pixels, and the plurality of third sub-pixels SP3 may be blue sub-pixels. However, the plurality of sub-pixels SP may also include a fourth sub-pixel that is a white sub-pixel. However, the present disclosure may be limited thereto.

[0042] The sub-pixel SP is the smallest unit constituting the screen. The plurality of sub-pixels SP can each include an organic light emitting element 140 and a driving element. The driving element can include a switching transistor, a driving transistor, etc. The driving element can be electrically connected to a signal line, for example, a gate line and a data line of a gate driver and a data driver disposed in the non-display area NA.

[0043] The non-display area NA can be arranged in the peripheral area of ​​the lower substrate 110. The non-display area NA can be an area where no image is displayed. The non-display area NA can be arranged to surround the display area AA. Various constituent elements for operating the plurality of sub-pixels SP arranged in the display area AA can be arranged in the non-display area NA. For example, a driver IC, a driver circuit, a signal line, a flexible film, etc. can be arranged, which are configured to supply signals for operating the plurality of sub-pixels SP. The driver IC can include a gate driver, a data driver, etc. The driver IC and the driver circuit can be arranged by a gate-in-plate (GIP) method, a chip-on-film (COF) method, a tape automated bonding (TAB) method, a tape carrier package (TCP) method, a chip-on-glass (COG) method, etc.

[0044] In the following, reference will be made to Figure 2 A plurality of sub-pixels SP provided in the display area AA of the display device 100 according to an embodiment of the present disclosure are described in more detail.

[0045] Refer to Figure 1 and Figure 2 According to an embodiment of the present disclosure, the display device 100 can include a lower substrate 110, a buffer layer 111, a gate insulating layer 112, an interlayer insulating layer 113, a passivation layer 114, a transistor 120, an outer coating layer 115, an organic light emitting element 140, a dam 116, an encapsulation layer 117, a color filter CF, a black matrix BM, a bonding member 118 and an upper substrate 150.

[0046] Reference Figure 2 , a buffer layer 111 is provided on the lower substrate 110. The buffer layer 111 can improve the bonding force between the lower substrate 110 and the layer formed on the buffer layer 111. In addition, the buffer layer 111 can prevent the alkaline material from leaking from the lower substrate 110, and prevent the diffusion of moisture and / or oxygen infiltrated from the outside of the lower substrate 110. The buffer layer 111 can be configured as a single layer or a multilayer made of silicon nitride (SiNx) or silicon oxide (SiOx). However, the present disclosure is not limited thereto. In addition, according to the type and material of the lower substrate 110, the structure and type of the transistor 120, etc., the buffer layer 111 can be excluded.

[0047] The transistor 120 can be disposed on the buffer layer 111 and operate the organic light emitting element 140. The transistor 120 can be disposed in each of the plurality of sub-pixels SP in the display area AA. The transistor 120 disposed in each of the plurality of sub-pixels SP can be used as a driving element of the display device 100. For example, the transistor 120 can be a thin film transistor (TFT), an N-channel metal oxide semiconductor (NMOS) transistor, a P-channel metal oxide semiconductor (PMOS) transistor, a complementary metal oxide semiconductor (CMOS) transistor, a field effect transistor (FET), etc. However, the present disclosure is not limited thereto. In the following, it will be described assuming that the transistor 120 is a thin film transistor. However, the present disclosure is not limited thereto.

[0048] The transistor 120 includes an active layer 121 , a gate electrode 122 , a source electrode 123 , and a drain electrode 124 . Figure 2 The transistor 120 shown is a thin film transistor having a top gate structure, in which a gate electrode 122 is disposed on an active layer 121. However, the present disclosure is not limited thereto. The transistor 120 can be implemented as a thin film transistor having a bottom gate structure.

[0049] An active layer 121 of the transistor 120 is disposed on the buffer layer 111. The active layer 121 is a region in which a channel is formed when the transistor 120 operates. The active layer 121 can be made of an oxide semiconductor, amorphous silicon (a-Si), polycrystalline silicon (poly-Si), an organic semiconductor, etc. However, the present disclosure is not limited thereto.

[0050] A gate insulating layer 112 is provided on the active layer 121. The gate insulating layer 112 can be configured as a single layer or multiple layers made of silicon nitride (SiNx) or silicon oxide (SiOx) as an inorganic material. The gate insulating layer 112 has contact holes through which the source electrode 123 and the drain electrode 124 are in contact with the source region and the drain region of the active layer 121, respectively. Figure 2 As shown, the gate insulating layer 112 can be formed on the entire surface of the lower substrate 110, or patterned to have the same width as the gate electrode 122. However, the present disclosure is not limited thereto.

[0051] A gate electrode 122 is disposed on the gate insulating layer 112. The gate electrode 122 is disposed on the gate insulating layer 112 and overlaps with the channel region of the active layer 121. The gate electrode 122 can be made of any of various metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), and alloys of two or more of these metal materials. Alternatively, the gate electrode 122 can be configured as a multilayer made of various metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), and alloys of two or more of these metal materials. However, the present disclosure is not limited thereto.

[0052] An interlayer insulating layer 113 is provided on the gate electrode 122. The interlayer insulating layer 113 can be configured as a single layer or multiple layers made of silicon nitride (SiNx) or silicon oxide (SiOx) as an inorganic material. The interlayer insulating layer 113 has a contact hole, and the source electrode 123 and the drain electrode 124 are respectively in contact with the source region and the drain region of the active layer 121 through the contact hole.

[0053] A source electrode 123 and a drain electrode 124 are provided on the interlayer insulating layer 113. The source electrode 123 and the drain electrode 124 are electrically connected to the active layer 121 through the contact hole of the gate insulating layer 112 and the contact hole of the interlayer insulating layer 113. The source electrode 123 and the drain electrode 124 can each be made of any of various metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu) and alloys of two or more of these metal materials. Alternatively, the source electrode 123 and the drain electrode 124 can each be configured as a multilayer made of various metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu) and alloys of two or more of these metal materials. However, the present disclosure is not limited thereto.

[0054] For ease of description, Figure 2 A driving transistor is shown among various transistors 120 included in the display device 100. However, other transistors such as a switching transistor can be provided.

[0055] Reference Figure 2 A passivation layer 114 for protecting the transistor 120 is disposed on the transistor 120. The passivation layer 114 has a contact hole through which a drain electrode 124 of the transistor 120 is exposed. Figure 2It is shown that a contact hole is formed in the passivation layer 114 to expose the drain electrode 124. However, the contact hole can be formed to expose the source electrode 123. The passivation layer 114 can be configured as a single layer or multiple layers made of silicon nitride (SiNx) or silicon oxide (SiOx). However, according to an embodiment, the passivation layer 114 can be excluded.

[0056] An overcoat layer 115 for planarizing an upper portion of the transistor 120 is disposed on the passivation layer 114. The overcoat layer 115 has a contact hole through which a drain electrode 124 of the transistor 120 is exposed. Figure 2 It is shown that a contact hole is formed in the outer coating layer 115 to expose the drain electrode 124. However, the contact hole can be formed to expose the source electrode 123. The outer coating layer 115 can be made of one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, benzocyclobutene, and photoresist. However, the present disclosure is not limited thereto.

[0057] The outer coating layer 115 can include a first top surface 115a and a second top surface 115b inclined relative to the first top surface 115a. The first top surface 115a is a surface of the outer coating layer 115 formed as a flat top surface, and the second top surface 115b is a surface of the outer coating layer 115 formed as a curved top surface.

[0058] Meanwhile, the second top surface 115b can be arranged to be inclined in different directions in regions corresponding to one sub-pixel SP and another adjacent sub-pixel SP, respectively. Therefore, a groove can be arranged in the outer coating layer 115 corresponding to the region between the plurality of sub-pixels SP, the groove being formed by converging the curved surfaces of the second top surface 115b inclined in different directions. For example, the second top surface 115b can be formed by removing a portion of the outer coating layer 115. However, the present disclosure is not limited thereto.

[0059] An organic light emitting element 140 is disposed on the overcoat layer 115. The organic light emitting element 140 includes first electrodes 141-1, 141-2, and 141-3 formed on the overcoat layer 115 and electrically connected to the drain electrode 124 of the transistor 120, a light emitting portion 142 disposed on the first electrodes 141-1, 141-2, and 141-3, and a second electrode 143 formed on the light emitting portion 142. In this case, the first electrodes 141-1, 141-2, and 141-3 can be anode electrodes, and the second electrode 143 can be a cathode electrode.

[0060] The first electrodes 141-1, 141-2, and 141-3 are disposed on the overcoat layer 115, and are electrically connected to the drain electrode 124 of the transistor 120 through contact holes formed in the passivation layer 114 and the overcoat layer 115. Thus, the organic light emitting element 140 can be connected to the transistor 120.

[0061] Figure 2 The first electrodes 141-1, 141-2 and 141-3 are shown to be electrically connected to the drain electrode 124 of the transistor 120 through the contact hole. However, according to the type of the transistor 120, the method of designing the driving circuit, etc., the first electrodes 141-1, 141-2 and 141-3 can be electrically connected to the source electrode 123 of the transistor 120 through the contact hole.

[0062] The first electrodes 141 - 1 , 141 - 2 , and 141 - 3 in the plurality of sub-pixels SP can each include a reflective layer 141M and a transparent conductive layer 141T disposed on the reflective layer 141M.

[0063] The reflective layer 141M is disposed on the overcoat layer 115 and is electrically connected to the drain electrode 124 through a contact hole formed in the passivation layer 114 and the overcoat layer 115. The reflective layer 141M is provided to allow light emitted from the light emitting portion 142 to propagate toward the upper side of the display device 100. For example, the reflective layer 141M can be made of a reflective metal material. However, the present disclosure is not limited thereto.

[0064] The reflective layer 141M includes a first portion 141M1 and a second portion 141M2.

[0065] The first portion 141M1 of the reflective layer 141M is disposed on the first top surface 115a of the outer coating layer 115 and is disposed adjacent to the transparent conductive layer 141T. Since the first portion 141M1 of the reflective layer 141M is disposed on the first top surface 115a of the outer coating layer 115 formed as a flat surface, the first portion 141M1 of the reflective layer 141M can have a planar shape according to the shape of the first top surface 115a.

[0066] The second portion 141M2 of the reflective layer 141M can be disposed on the second top surface 115b of the overcoat layer 115 and spaced apart from the transparent conductive layer 141T. Since the second portion 141M2 of the reflective layer 141M is disposed on the second top surface 115b including a curved surface, the second portion 141M2 of the reflective layer 141M can have a curved shape according to the shape of the second top surface 115b. Therefore, the second portion 141M2 of the reflective layer 141M can be configured to reflect light toward another sub-pixel SP adjacent to the sub-pixel SP in which the corresponding reflective layer 141M is disposed.

[0067] Meanwhile, the second portion 141M2 of the reflective layer 141M can be a portion extending from the first portion 141M1 of the reflective layer 141M disposed on the first top surface 115a of the outer coating layer 115 to the second top surface 115b of the outer coating layer 115. The first portion 141M1 and the second portion 141M2 of the reflective layer 141M can be integrated. However, the present disclosure is not limited thereto.

[0068] The transparent conductive layer 141T can be made of a transparent conductive material having a high work function so as to supply positive holes to the light emitting portion 142 and emit light emitted from the light emitting portion 142. For example, the first electrodes 141-1, 141-2, and 141-3 can each be made of a transparent conductive oxide based on indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), and tin oxide (TO). However, the present disclosure is not limited thereto.

[0069] The transparent conductive layer 141T includes a first portion 141T1 and a second portion 141T2 .

[0070] The first portion 141T1 of the transparent conductive layer 141T is disposed adjacent to the reflective layer 141M. The first portion 141T1 of the transparent conductive layer 141T is disposed on the first portion 141M1 of the reflective layer 141M. The first portion 141T1 of the transparent conductive layer 141T can have a planar shape based on the shape of the first portion 141M1 of the reflective layer 141M.

[0071] The second portion 141T2 of the transparent conductive layer 141T is disposed to be spaced apart from the reflective layer 141M. The bank 116 is disposed between the second portion 141M2 of the reflective layer 141M and the second portion 141T2 of the transparent conductive layer 141T. Therefore, the second portion 141T2 of the transparent conductive layer 141T can be disposed to be spaced apart from the reflective layer 141M.

[0072] Meanwhile, the second portion 141T2 of the transparent conductive layer 141T can be a portion extending from the first portion 141T1 of the transparent conductive layer 141T disposed on the first portion 141M1 of the reflective layer 141M to the top surface of the bank 116. The first portion 141T1 and the second portion 141T2 of the transparent conductive layer 141T can be integrated. However, the present disclosure is not limited thereto.

[0073] Reference Figure 2, the second portion 141T2 of the transparent conductive layer 141T can be configured so that light reflected from the second portion 141M2 of the reflective layer 141M of another sub-pixel SP adjacent to the sub-pixel SP in which the corresponding transparent conductive layer 141T is disposed reaches the second portion 141T2 of the transparent conductive layer 141T. For example, the second light L2 emitted from the light emitting portion 142 adjacent to the second portion 141T2 of the transparent conductive layer 141T can be reflected by the second portion 141M2 of the reflective layer 141M in another adjacent sub-pixel SP and reaches the second portion 141T2 of the transparent conductive layer 141T, so that the second light L2 can be emitted from the sub-pixel SP in which the corresponding transparent conductive layer 141T is disposed.

[0074] The first electrodes 141-1, 141-2, and 141-3 of the first, second, and third subpixels SP1, SP2, and SP3 include different numbers of transparent conductive layers 141T. Therefore, the transparent conductive layers 141T included in the first electrodes 141-1, 141-2, and 141-3 can have different thicknesses in the first, second, and third subpixels SP1, SP2, and SP3.

[0075] Specifically, the first electrode 141-1 of the first subpixel SP1 includes a reflective layer 141M, a second transparent conductive layer 141Tb disposed on the reflective layer 141M, a third transparent conductive layer 141Tc disposed on the second transparent conductive layer 141Tb, and a first transparent conductive layer 141Ta disposed on the third transparent conductive layer 141Tc. The first electrode 141-2 of the second subpixel SP2 includes a reflective layer 141M, a second transparent conductive layer 141Tb disposed on the reflective layer 141M, and a first transparent conductive layer 141Ta disposed on the second transparent conductive layer 141Tb. The first electrode 141-3 of the third subpixel SP3 includes a reflective layer 141M and a first transparent conductive layer 141Ta disposed on the reflective layer 141M.

[0076] Therefore, in the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, the first electrodes 141-1, 141-2, and 141-3 can have different thicknesses. For example, when the first sub-pixel SP1 is a red pixel, the second sub-pixel SP2 is a green pixel, and the third sub-pixel SP3 is a blue pixel, the thicknesses of the first electrodes 141-1, 141-2, and 141-3 can be configured so that the first electrode 141-1 of the first sub-pixel SP1 can be thicker than the first electrode 141-2 of the second sub-pixel SP2 and the first electrode 141-3 of the third sub-pixel SP3, and the first electrode 141-2 of the second sub-pixel SP2 can be thicker than the first electrode 141-3 of the third sub-pixel SP3. Therefore, the first electrodes 141-1, 141-2, and 141-3 can have a microcavity structure, in which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified in the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3.

[0077] A bank 116 is disposed on the first electrodes 141-1, 141-2, and 141-3 and the overcoat layer 115. The bank 116 can define a light emitting region by covering edges of the first electrodes 141-1, 141-2, and 141-3 of the organic light emitting element 140. The bank 116 can be disposed between adjacent sub-pixels SP and reduce color mixing of light beams emitted from the organic light emitting element 140 in the plurality of sub-pixels SP.

[0078] The bank 116 is disposed between the second portion 141T2 of the transparent conductive layer 141T, which is the edge of the first electrodes 141 - 1 , 141 - 2 , and 141 - 3 between the plurality of sub-pixels SP, and the second portion 141M2 of the reflective layer 141M.

[0079] The top surface of the bank 116 is provided to include a curved surface. In addition, the transparent conductive layer 141T provided on the top surface of the bank 116 can be provided to have a curved surface along the top surface of the bank 116. Therefore, the second portion 141T2 of the transparent conductive layer 141T can be configured so that light reflected from the second portion 141M2 of the reflective layer 141M of another sub-pixel SP adjacent to the sub-pixel SP in which the corresponding transparent conductive layer 141T is provided reaches the second portion 141T2 of the transparent conductive layer 141T.

[0080] The bank 116 can be made of an organic material. For example, the bank 116 can be made of a polyimide resin, an acrylic resin, or a benzocyclobutene resin. However, the present disclosure is not limited thereto.

[0081] A light emitting portion 142 is disposed on the transparent conductive layer 141T of the bank 116 and the first electrodes 141-1, 141-2, and 141-3. For example, the light emitting portion 142 can be a light emitting layer that emits light with any one of red, green, blue, and white colors. In addition, the light emitting portion 142 can also include various layers, such as a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer, and an electron transport layer. However, the present disclosure is not limited thereto.

[0082] A second electrode 143 is provided on the light emitting portion 142. The second electrode 143 can supply electrons to the light emitting portion 142. The second electrode 143 can be made of a conductive material having a low work function. The second electrode 143 can be configured to allow light emitted from the light emitting portion 142 to propagate toward the upper side of the display device 100. For example, the second electrode 143 can be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO) or an opaque conductive material such as titanium (Ti), gold (Au), silver (Ag), copper (Cu) or an alloy thereof. However, the present disclosure is not limited thereto.

[0083] Meanwhile, an inorganic insulating layer for protecting the second electrode 143 can also be disposed on the second electrode 143. For example, the inorganic insulating layer can be configured as a single layer or multiple layers made of silicon nitride (SiNx) or silicon oxide (SiOx). However, the present disclosure is not limited thereto.

[0084] An encapsulation layer 117 is disposed on the organic light emitting element 140. The encapsulation layer 117 can cover the organic light emitting element 140. The encapsulation layer 117 can protect the organic light emitting element 140 from external moisture, oxygen, impact, etc. The encapsulation layer 117 can be formed by alternately stacking a plurality of inorganic layers and a plurality of organic layers. For example, the inorganic layer can be made of an inorganic material such as silicon nitride (SiNx), silicon oxide (SiOx), or aluminum oxide (AlOx). The organic layer can be made of an epoxy polymer or an acrylic polymer. However, the present disclosure is not limited thereto.

[0085] A color filter CF and a black matrix BM are disposed on the encapsulation layer 117 .

[0086] The color filter CF can be disposed in each of the plurality of sub-pixels SP. The black matrix BM can be disposed at the boundary between the plurality of sub-pixels SP. Therefore, the black matrix BM can separate the plurality of sub-pixels SP and the color filter CF disposed in the sub-pixels SP, thereby reducing color mixing between the plurality of sub-pixels SP.

[0087] For example, in the case where the light emitted from the light emitting portion 142 is white light, the color filter CF converts the light emitted from the sub-pixel SP into red light, green light, and blue light. For example, the first color filter CF1 provided in the first sub-pixel SP1 as a red sub-pixel can be a red color filter. In addition, the second color filter CF2 as a green color filter can be provided in the second sub-pixel SP2 as a green sub-pixel, and the third color filter CF3 as a blue color filter can be provided in the third sub-pixel SP3 as a blue sub-pixel. However, the present disclosure is not limited thereto.

[0088] For example, the black matrix BM can be made of chrome (Cr) or other opaque metal films, or made of resin. However, the present disclosure is not limited thereto.

[0089] An upper substrate 150 is disposed over the color filter CF and the black matrix BM. The upper substrate 150, together with the encapsulation layer 117, can protect the organic light emitting element 140 from external moisture, oxygen, impact, etc. For example, the upper substrate 150 can be made of a transparent insulating material, and the display device 100 can be configured as a top emission type display device 100. However, the present disclosure is not limited thereto.

[0090] A bonding member 118 is provided between the color filter CF, the black matrix BM and the upper substrate 150. The bonding member 118 can bond the color filter CF, the black matrix BM and the upper substrate 150. The bonding member 118 can be made of a bondable material. The bonding member 118 can be a thermosetting or naturally curable bonding agent. For example, the bonding member 118 can be an optically clear adhesive (OCA), a pressure sensitive adhesive (PSA), etc. However, the present disclosure is not limited thereto.

[0091] In the display device 100 according to an embodiment of the present disclosure, the first electrodes 141-1, 141-2, and 141-3 in the plurality of sub-pixels SP emitting light beams having different colors can be arranged to have different thicknesses to improve the color viewing angle characteristics. Therefore, the plurality of sub-pixels SP can each have a microcavity structure corresponding to the light emitted from the corresponding sub-pixel SP. The microcavity structure is a structure in which light is repeatedly reflected between the first electrodes 141-1, 141-2, and 141-3 and the second electrode 143 spaced apart from each other by an optical path (optical length) having a specific interval, so that light having a specific wavelength is amplified by constructive interference. Therefore, the light emitted from each of the plurality of sub-pixels SP can be amplified, thereby improving the color viewing angle characteristics of the display device 100.

[0092] For example, one subpixel SP can be configured to have a microcavity structure corresponding to light emitted from the corresponding subpixel SP due to a specific interval between the first electrodes 141-1, 141-2, and 141-3 of the corresponding subpixel SP and the second electrode 143. In this case, for example, a specific interval between the first electrodes 141-1, 141-2, and 141-3 and the second electrode 143 that allows the subpixel SP to have a microcavity structure can be defined as a microcavity interval.

[0093] An interval between the first portion 141M1 of the reflective layer 141M disposed in one sub-pixel SP and the second electrode 143 can be set as a first micro-cavity interval MCI1 by which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0094] Therefore, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 141T1 of the transparent conductive layer 141T in one sub-pixel SP, can be amplified by constructive interference when it is repeatedly reflected between the first portion 141M1 of the reflective layer 141M and the second electrode 143 disposed in the same sub-pixel SP as the corresponding transparent conductive layer 141T through the first microcavity interval MCI1.

[0095] The interval between the second electrode 143 provided in one sub-pixel SP and the second portion 141M2 of the reflective layer 141M provided in another sub-pixel SP adjacent to the corresponding sub-pixel can be set to a second microcavity interval MCI2, through which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0096] Therefore, the second light L2 - light emitted from the light emitting portion 142 adjacent to the second portion 141T2 of the transparent conductive layer 141T - can be amplified by constructive interference when repeatedly reflected between the second electrode 143 provided in one sub-pixel SP and the second portion 141M2 of the reflective layer 141M provided in another sub-pixel SP adjacent to the corresponding sub-pixel SP.

[0097] In the display device 100 according to an embodiment of the present disclosure, the first microcavity interval MCI1 can be different from the second microcavity interval MCI2. Figure 2 As shown, the first microcavity interval MCI1 can be smaller than the second microcavity interval MCI2. Therefore, compared with the first light L1 amplified by the first microcavity interval MCI1, the second light L2 amplified by the second microcavity interval MCI2 larger than the first microcavity interval MCI1 moves along the optical path with a large interval, so that the second light L2 can have a lower light intensity than the first light L1.

[0098] In the following, reference will be made to Figure 3 The light intensities of the first light L1 and the second light L2 with respect to the viewing angle of the display device 100 according to an embodiment of the present disclosure are described in detail.

[0099] Figure 3 is a graph showing the light intensities of the first light and the second light with respect to the viewing angle of the display device according to an embodiment of the present disclosure. Figure 3 In the graph of , the X-axis represents the viewing angle θ of the first light L1 and the second light L2 when the central viewing angle of the first light L1 and the second light L2 is set to 0°. The light intensity is the light intensity of the first light L1 and the second light L2 relative to the viewing angle θ on the basis of setting the light intensity at the central viewing angle (0°) of the first light L1 to 100.

[0100] Reference Figure 3 , the light intensity at the center viewing angle (0°) of the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 141T1 of the transparent conductive layer 141T, is 100. Therefore, the highest light intensity is achieved at the center viewing angle (0°) of the first light L1.

[0101] Furthermore, it can be seen that the light intensity of the first light L1 decreases as the viewing angle θ changes from the center viewing angle (0°), so that the light intensity of the first light L1 at viewing angles of −90° and 90° decreases to 0.

[0102] The light intensity of the second light L2 at the central viewing angle (0°) is 60, and the second light L2 is light emitted from the light emitting portion 142 adjacent to the second portion 141T2 of the transparent conductive layer 141T. Therefore, it can be seen that the light intensity of the second light L2 at the central viewing angle (0°) is lower than that of the first light L1. For example, the intensity of the first light L1 at the central viewing angle (0°) can be higher than the intensity of the second light L2 at the central viewing angle (0°).

[0103] Furthermore, the light intensity of the second light L2 decreases as the viewing angle θ changes from the center viewing angle (0°), and the light intensity of the second light L2 at viewing angles of −90° and 90° decreases to 40.

[0104] Meanwhile, in a graph showing a specific wavelength distribution, the width of the distribution corresponding to 1 / 2 of the maximum value can be referred to as the full width at half maximum (FWHM). Figure 3, it can be seen that the full width at half maximum FWHM1 of the first light L1, which is the width of the distribution corresponding to 1 / 2 of the maximum intensity of the first light L1, is smaller than the full width at half maximum FWHM2 of the second light L2, which is the width of the distribution corresponding to 1 / 2 of the maximum intensity of the second light L2. Specifically, in a distribution with a light intensity of 50 corresponding to 1 / 2 of the maximum intensities of the first light L1 and the second light L2, the full width at half maximum FWHM1 of the first light L1 can be smaller than the full width at half maximum FWHM2 of the second light L2.

[0105] At the same time, it can be seen that as the viewing angle changes from the center viewing angle (0°) to the viewing angles of -90° and 90°, the change in light intensity of the second light L2 relative to the change in viewing angle is smaller than that of the first light L1, because the change value of the light intensity of the first light L1 is 100, while the change value of the light intensity of the second light L2 is 20.

[0106] A display device with a microcavity structure has a structure in which light is amplified by constructive interference by repeated reflection between a first electrode and a second electrode that are arranged to have a microcavity interval. However, light can have a high straightness as the intensity increases. Therefore, when the straightness increases with the increase of light intensity, the viewing angle at which the light can be detected may become narrower. Therefore, since the light is amplified in a display device with a microcavity structure, light with high intensity is emitted, so that the viewing angle at which the light emitted from the display device can be detected may become narrower. For example, as the viewing angle changes from the central viewing angle, the light intensity of the light emitted from the display device decreases. Therefore, the problem that will arise is that as the viewing angle changes from the central viewing angle of the light emitted from the display device, the brightness of the emitted light deteriorates and the color coordinates change. In addition, there will be a problem that the display quality of the display device deteriorates due to the changes in brightness and color coordinates caused by the change in viewing angle.

[0107] Therefore, in the display device 100 according to an embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), while another portion of the light emitted from a sub-pixel SP is configured to minimize the change in light intensity according to the viewing angle θ, so that the luminous efficiency of the display device 100 can be improved and the brightness degradation and color coordinate changes according to the viewing angle can be minimized.

[0108] Specifically, in the display device 100 according to the embodiment of the present disclosure, the first light L1, which is the light emitted from the light emitting portion 142 adjacent to the first portion 141T1 of the transparent conductive layer 141T, is amplified by the first microcavity interval MCI1, which is the interval between the first portion 141M1 of the reflective layer 141M disposed in the corresponding sub-pixel SP and the second electrode 143. In addition, the second light L2, which is the light emitted from the light emitting portion 142 adjacent to the second portion 141T2 of the transparent conductive layer 141T, is amplified by the second microcavity interval MCI2, which is the interval between the second portion 141M2 of the reflective layer 141M disposed in another sub-pixel SP adjacent to the corresponding sub-pixel and the second electrode 143. In this case, compared with the first light L1 amplified by the first microcavity interval MCI1, the second light L2 amplified by the second microcavity interval MCI2, which is larger than the first microcavity interval MCI1, moves along an optical path having a large interval, so that the light intensity of the second light L2 can be lower than that of the first light L1. Therefore, the first light L1 having a relatively high light intensity improves the straightness of the light, thereby improving the light intensity at the center viewing angle (0°). In addition, the second light L2 having a relatively low light intensity can have a reduced straightness, so that the second light L2 can be detected even at a relatively wide viewing angle, and the light intensity change according to the viewing angle θ can be minimized. Therefore, the light intensity of the first light L1 emitted from the sub-pixel SP can be increased, so that the luminous efficiency of the display device 100 can be improved, and the second light L2 can be configured to compensate for the light intensity change according to the viewing angle change of the first light L1, so that the brightness degradation and color coordinate change according to the viewing angle can be minimized. Therefore, in the display device 100 according to an embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to improve the light intensity at the center viewing angle (0°), and another portion of the light emitted from a sub-pixel SP is configured to minimize the light intensity change according to the viewing angle θ. Therefore, the light emission efficiency of the display device 100 can be improved, and the brightness degradation and color coordinate changes according to the viewing angle can be minimized, which can improve the display quality of the display device 100 and provide a high-efficiency, low-power display device 100.

[0109] In the following, reference will be made to Figure 4A and Figure 4B A display device according to another embodiment of the present disclosure is described in detail.

[0110] Figure 4A is a cross-sectional view of a display device according to another embodiment of the present disclosure. Figure 4B yes Figure 4A Magnified view of region IVb in FIG. Figure 4A and Figure 4B The display device 400 in the embodiment is configured similarly to Figures 1 to 3 The display device 100 in FIG. 1 is substantially the same except for the overcoat layer 415, the first electrodes 441-1, 441-2, and 441-3, and the bank 116. Therefore, repeated descriptions of the same components will be omitted or may be briefly provided.

[0111] First, refer to Figure 4A , the outer coating layer 415 can include a first top surface 415a and a second top surface 415b inclined relative to the first top surface 415a. In this case, the first top surface 415a is a surface of a flat surface formed as the top surface of the outer coating layer 415, and the second top surface 415b is a surface including a flat surface inclined relative to the first top surface 415a.

[0112] Meanwhile, the second top surface 415b can be disposed to be inclined in different directions in regions corresponding to one sub-pixel SP and another adjacent sub-pixel SP, respectively. Therefore, a groove formed by converging flat surfaces of the second top surface 415b inclined in different directions can be disposed in the overcoat layer 415 corresponding to a region between the plurality of sub-pixels SP.

[0113] The first electrodes 441-1, 441-2, and 441-3 are disposed on the overcoat layer 415. The first electrodes 441-1, 441-2, and 441-3 can each include a reflective layer 441M disposed on the overcoat layer 415 and a transparent conductive layer 441T disposed on the reflective layer 441M.

[0114] The reflective layer 441M includes a first portion 441M1 disposed on the first top surface 415a of the outer coating layer 415 and a second portion 441M2 disposed on the second top surface 415b of the outer coating layer 415. Since the first portion 441M1 of the reflective layer 441M is disposed on the first top surface 415a of the outer coating layer 415, the first portion 441M1 of the reflective layer 441M can have a planar shape according to the shape of the first top surface 415a. Since the second portion 441M2 of the reflective layer 441M is disposed on the second top surface 415b, which is a flat surface inclined relative to the first top surface 415a, the second portion 441M2 of the reflective layer 441M can have a planar shape inclined relative to the first top surface 415a along the second top surface 415b. Therefore, the second portion 441M2 of the reflective layer 441M can be configured to reflect light toward another sub-pixel SP adjacent to the sub-pixel SP in which the corresponding reflective layer 441M is disposed.

[0115] The transparent conductive layer 441T includes a first portion 441T1 and a second portion 441T2. The first portion 441T1 of the transparent conductive layer 441T is disposed on the first portion 441M1 of the reflective layer 441M. The first portion 441T1 of the transparent conductive layer 441T can have a planar shape consistent with the shape of the first portion 441M1 of the reflective layer 441M. The second portion 441T2 of the transparent conductive layer 441T can be disposed to be spaced apart from the reflective layer 441M. Figure 4A , the second portion 441T2 of the transparent conductive layer 441T disposed in one sub-pixel SP among the plurality of sub-pixels SP can be disposed parallel to the second portion 441M2 of the reflective layer 441M disposed in another adjacent sub-pixel SP.

[0116] A bank 416 is provided between the second portion 441M2 of the reflective layer 441M and the second portion 441T2 of the transparent conductive layer 441T. Figure 4A , the top surface of the bank 416 can be disposed to include a flat surface inclined with respect to the first top surface 415a of the overcoat layer 415. Therefore, the second portion 441T2 of the transparent conductive layer 441T disposed on the inclined top surface of the bank 416 can be disposed parallel to the second portion 441M2 of the reflective layer 441M disposed in another sub-pixel SP adjacent to the corresponding sub-pixel SP.

[0117] The top surface of the bank 416 can include a flat surface inclined relative to the first top surface 415a of the outer coating layer 415, and can be provided in a tapered shape. For example, the bank 416 can be made of an inorganic material having an easily controllable shape. However, the present disclosure is not limited thereto.

[0118] In this case, the inclination of the second top surface 415b of the outer coating 415 and the inclination of the top surface of the bank 416 can be 30° to 45°. However, the present disclosure is not limited thereto. For example, in the case where the inclination of the second top surface of the outer coating and the inclination of the top surface of the bank exceed 45°, since the top surface of the bank has a large inclination, the thickness of the light-emitting portion disposed above the bank and made of an organic material may be a non-uniform thickness. In addition, in the case where the inclination of the second top surface of the outer coating and the inclination of the top surface of the bank are less than 30°, it is difficult for the second part of the reflective layer to reflect light toward another sub-pixel adjacent to the sub-pixel in which the corresponding reflective layer is disposed. Therefore, the inclination of the second top surface 415b of the outer coating 415 and the inclination of the top surface of the bank 416 are set to 30° to 45°, so that the thickness of the light-emitting portion 142 disposed above the bank 416 can be uniform, and the second part 441M2 of the reflective layer 441M can be configured to reflect light toward another adjacent sub-pixel SP. However, the present disclosure is not limited thereto.

[0119] An interval between the first portion 441M1 of the reflective layer 441M disposed in one sub-pixel SP and the second electrode 143 can be set as a first micro-cavity interval MCI1 through which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0120] Therefore, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 441T1 of the transparent conductive layer 441T in one sub-pixel SP, can be amplified by constructive interference when it is repeatedly reflected between the first portion 441M1 of the reflective layer 441M provided in the same sub-pixel SP as the corresponding transparent conductive layer 441T and the second electrode 143 through the first microcavity interval MCI1.

[0121] An interval between the second electrode 143 disposed in one subpixel SP and the second portion 441M2 of the reflective layer 441M disposed in another subpixel SP adjacent to the corresponding subpixel can be set as a second microcavity interval MCI2, through which light having a wavelength corresponding to light emitted from the corresponding subpixel SP can be amplified.

[0122] Therefore, the second light L2 - light emitted from the light emitting portion 142 adjacent to the second portion 441T2 of the transparent conductive layer 441T - can be amplified by constructive interference when repeatedly reflected between the second electrode 143 provided in one sub-pixel SP and the second portion 441M2 of the reflective layer 441M provided in another sub-pixel SP adjacent to the corresponding sub-pixel SP.

[0123] In the following, reference will be made to Figure 4B An exemplary method of providing the second microcavity interval MCI2 according to aspects of the present disclosure is described in detail.

[0124] exist Figure 4B , R1 indicates the width of a region between a plurality of sub-pixels SP in which a second top surface 415 b of an outer coating layer 415 corresponding to any one of the sub-pixels SP is disposed, R2 indicates the height of a region in which the second top surface 415 b is disposed, R3 indicates the width of the second top surface 415 b, and θ indicates the inclination of the second top surface 415 b.

[0125] Reference Figure 4B, the inclination θ of the second top surface 415b and the width R3 of the second top surface 415b can be set by means of the width R1 of the area where the second top surface 415b is provided and the height R2 of the area where the second top surface 415b is provided. For example, in the case where the inclination θ of the second top surface 415b is to be set to 30° and the width R3 of the second top surface 415b is to be set to 1408nm, the width R1 of the area where the second top surface 415b is provided can be calculated as 1219nm as a value of 1408nm×cos30°, and the height R2 of the area where the second top surface 415b is provided can be calculated as 704nm as a value of 1408nm×sin30°. Therefore, the inclination θ of the second top surface 415b can be set to 30°, and the width R3 of the second top surface 415b can be set to 1408nm by removing a portion of the top surface of the outer coating 415 to set a width of 1219nm and a height of 704nm.

[0126] In addition, the second microcavity interval MCI2 can be set by means of the inclination θ of the second top surface 415b and the width R3 of the second top surface 415b. For example, in a display device in which the thickness of the transparent conductive layer 441T is 84nm, the thickness of the light emitting portion 142 is 300nm, and the inclination θ of the second top surface 415b is 30°, when the second microcavity interval MCI2 is set to 1792nm, the width R3 of the second top surface 415b is set by removing the thickness of the transparent conductive layer 441T and the thickness of the light emitting portion 142 from the second microcavity interval MCI2, that is, 1408nm, in which case the width R3 of the second top surface 415b can be calculated as a value of (1792nm-84nm-300nm)×sec30°, that is, 1626nm.

[0127] In a display device 400 according to another embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), while another portion of the light emitted from a sub-pixel SP is configured to minimize the change in light intensity according to the viewing angle θ, so that the luminous efficiency of the display device 400 can be improved and the brightness degradation and color coordinate changes according to the viewing angle can be minimized.

[0128] Specifically, in the display device 400 according to another embodiment of the present disclosure, the first light L1, which is the light emitted from the light emitting portion 142 adjacent to the first portion 441T1 of the transparent conductive layer 441T, is amplified by the first microcavity interval MCI1, which is the interval between the first portion 441M1 of the reflective layer 441M disposed in the corresponding sub-pixel SP and the second electrode 143. In addition, the second light L2, which is the light emitted from the light emitting portion 142 adjacent to the second portion 441T2 of the transparent conductive layer 441T, is amplified by the second microcavity interval MCI2, which is the interval between the second portion 441M2 of the reflective layer 441M disposed in another sub-pixel SP adjacent to the corresponding sub-pixel and the second electrode 143. In this case, compared with the first light L1 amplified by the first microcavity interval MCI1, the second light L2 amplified by the second microcavity interval MCI2, which is larger than the first microcavity interval MCI1, moves along an optical path having a large interval, so that the light intensity of the second light L2 can be lower than that of the first light L1. Therefore, the first light L1 having a relatively high light intensity improves the straightness of the light, thereby improving the light intensity at the center viewing angle (0°). In addition, the second light L2 having a relatively low light intensity can have a reduced straightness, so that the second light L2 can be detected even at a relatively wide viewing angle, and the light intensity change according to the viewing angle θ can be minimized. Therefore, the light intensity of the first light L1 emitted from the sub-pixel SP can be increased, so that the luminous efficiency of the display device 400 can be improved, and the second light L2 can be configured to compensate for the light intensity change according to the viewing angle change of the first light L1, so that the degradation of the brightness and the color coordinate change according to the viewing angle can be minimized. Therefore, in the display device 400 according to another embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to improve the light intensity at the center viewing angle (0°), and another portion of the light emitted from a sub-pixel SP is configured to minimize the light intensity change according to the viewing angle θ. Accordingly, the light emission efficiency of the display device 400 can be improved, and the brightness degradation and color coordinate variation according to the viewing angle can be minimized, which can improve the display quality of the display device 400 and provide a high-efficiency, low-power display device 400.

[0129] In the following, reference will be made to Figure 5 A display device according to still another embodiment of the present disclosure is described in detail.

[0130] Figure 5 is a cross-sectional view of a display device according to still another embodiment of the present disclosure. Figure 5 The display device 500 in the embodiment is configured similarly to Figures 1 to 3The display device 100 in FIG. 1 is substantially the same except for the overcoat layer 515, the first electrodes 541-1, 541-2, and 541-3, and the bank 516. Therefore, repeated descriptions of the same components will be omitted or may be briefly provided.

[0131] Reference Figure 5 The overcoat layer 515 having a flat top surface is disposed between the plurality of transistors 120 and the plurality of first electrodes 541-1, 541-2, and 541-3. Therefore, all bottom surfaces of the plurality of first electrodes 541-1, 541-2, and 541-3 can be disposed on the same plane on the top surface of the overcoat layer 515.

[0132] The first electrodes 541 - 1 , 541 - 2 , and 541 - 3 can each include a reflective layer 541M disposed on the overcoat layer 515 and a transparent conductive layer 541T disposed on the reflective layer 541M.

[0133] Reference Figure 5 , the reflective layer 541M includes a first portion 541M1 configured to be adjacent to the transparent conductive layer 541T and a second portion 541M2 spaced apart from the transparent conductive layer 541T. The transparent conductive layer 541T includes a first portion 541T1 configured to be adjacent to the reflective layer 541M and a second portion 541T2 spaced apart from the reflective layer 541M. For example, the first portion 541M1 of the reflective layer 541M can be adjacent to the first portion 541T1 of the transparent conductive layer 541T, and the second portion 541M2 of the reflective layer 541M can be spaced apart from the transparent conductive layer 541T.

[0134] The bank 516 is disposed between the second portion 541M2 of the reflective layer 541M and the second portion 541T2 of the transparent conductive layer 541T. Therefore, the second portion 541M2 of the reflective layer 541M and the second portion 541T2 of the transparent conductive layer 541T can be disposed to be spaced apart from each other at a predetermined interval.

[0135] Meanwhile, the embankment 516 can be configured to define a second microcavity interval MCI2 together with the second portion 541T2 of the transparent conductive layer 541T and the light emitting portion 142. In this case, the refractive index of the embankment 516 can be 1.8 or more. For example, in the case where the refractive index of the material constituting the light emitting portion 142 and the transparent conductive layer 541T disposed above the embankment 516 is 1.7 to 1.8, the embankment 516 can be made of a material having a refractive index of 1.8 or more. However, the present disclosure is not limited thereto.

[0136] An interval between the first portion 541M1 of the reflective layer 541M disposed in one sub-pixel SP and the second electrode 143 can be set as a first micro-cavity interval MCI1 by which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0137] Therefore, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 541T1 of the transparent conductive layer 541T in one sub-pixel SP, can be amplified by constructive interference when it is repeatedly reflected between the first portion 541M1 of the reflective layer 541M provided in the same sub-pixel SP as the corresponding transparent conductive layer 541T and the second electrode 143 through the first microcavity interval MCI1.

[0138] An interval between the second portion 541M2 of the reflective layer 541M disposed in one sub-pixel SP and the second electrode 143 can be set as a second microcavity interval MCI2 by which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0139] Therefore, the second light L2, which is light emitted from the light emitting portion 142 adjacent to the second portion 541T2 of the transparent conductive layer 541T, can be amplified by constructive interference when repeatedly reflected between the second portion 541M2 of the reflective layer 541M provided in one subpixel SP and the second electrode 143 .

[0140] In a display device 500 according to another embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), while another portion of the light emitted from a sub-pixel SP is configured to minimize the change in light intensity according to the viewing angle θ, so that the luminous efficiency of the display device 500 can be improved and the brightness degradation and color coordinate changes according to the viewing angle can be minimized.

[0141] Specifically, in the display device 500 according to still another embodiment of the present disclosure, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 541T1 of the transparent conductive layer 541T, is amplified by the first microcavity interval MCI1, which is the interval between the first portion 541M1 of the reflective layer 541M provided in the corresponding sub-pixel SP and the second electrode 143. In addition, the second light L2, which is light emitted from the light emitting portion 142 adjacent to the second portion 541T2 of the transparent conductive layer 541T, is amplified by the second microcavity interval MCI2, which is the interval between the second portion 541M2 of the reflective layer 541M provided in one sub-pixel SP and the second electrode 143.

[0142] In this case, compared with the first light L1 amplified by the first microcavity interval MCI1, the second light L2 amplified by the second microcavity interval MCI2 larger than the first microcavity interval MCI1 moves along an optical path with a large interval, so that the light intensity of the second light L2 can be lower than the first light L1. Therefore, the first light L1 with a relatively high light intensity improves the straightness of the light, thereby improving the light intensity at the center viewing angle (0°). In addition, the second light L2 with a relatively low light intensity can have a reduced straightness, so that the second light L2 can be detected even at a relatively wide viewing angle, and the light intensity change according to the viewing angle θ can be minimized. Therefore, the light intensity of the first light L1 emitted from the subpixel SP can be increased, so that the luminous efficiency of the display device 500 can be improved, and the second light L2 can be configured to compensate for the light intensity change according to the viewing angle change of the first light L1, so that the degradation of the brightness according to the viewing angle and the color coordinate change can be minimized. Therefore, in the display device 500 according to another embodiment of the present disclosure, a part of the light emitted from one sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), and another part of the light emitted from one sub-pixel SP is configured to minimize the change in light intensity according to the viewing angle θ. Accordingly, the luminous efficiency of the display device 500 can be improved, and the brightness degradation and color coordinate change according to the viewing angle can be minimized, which can improve the display quality of the display device 500 and provide a high-efficiency, low-power display device 500.

[0143] In the following, reference will be made to Figure 6 A display device according to still another embodiment of the present disclosure is described in detail.

[0144] Figure 6 is a cross-sectional view of a display device according to still another embodiment of the present disclosure. Figure 6 The display device 600 in the embodiment is similar in configuration to Figure 5 The display device 500 in FIG. 6 is substantially the same except for the first electrodes 641-1, 641-2, and 641-3, the additional pattern AP, and the bank 616. Therefore, repeated descriptions of the same components will be omitted or may be briefly provided.

[0145] Reference Figure 6 , the first electrodes 641 - 1 , 641 - 2 , and 641 - 3 can each include a reflective layer 641M disposed on the overcoat layer 515 and a transparent conductive layer 641T disposed on the reflective layer 641M.

[0146] Reference Figure 6, the reflective layer 641M includes a first portion 641M1 configured to be adjacent to the transparent conductive layer 641T and a second portion 641M2 spaced apart from the transparent conductive layer 641T. The transparent conductive layer 641T includes a first portion 641T1 configured to be adjacent to the reflective layer 641M and a second portion 641T2 spaced apart from the reflective layer 641M. For example, the first portion 641M1 of the reflective layer 641M can be adjacent to the first portion 641T1 of the transparent conductive layer 641T, and the second portion 641M2 of the reflective layer 641M can be spaced apart from the transparent conductive layer 641T.

[0147] The additional pattern AP is disposed between the second portion 641M2 of the reflective layer 641M and the second portion 641T2 of the transparent conductive layer 641T. The additional pattern AP can be configured to define a second microcavity interval MCI2 together with the second portion 641T2 of the transparent conductive layer 641T and the light emitting portion 142. Therefore, the second portion 641M2 of the reflective layer 641M and the second portion 641T2 of the transparent conductive layer 641T can be disposed to be spaced apart from each other at a predetermined interval.

[0148] Meanwhile, the additional pattern AP can be made of the same material as the transparent conductive layer 641T. Therefore, since the additional pattern AP has the same refractive index as the transparent conductive layer 641T, the degree to which the second microcavity interval MCI2 is deformed due to the difference in refractive index between the additional pattern AP and the transparent conductive layer 641T can be minimized. In this case, for example, since the transparent conductive layer 641T can be formed after the additional pattern AP is provided, an interface may exist between the additional pattern AP and the transparent conductive layer 641T. However, the present disclosure is not limited thereto.

[0149] A bank 616 can be provided between a portion of the second portion 641T2 of the transparent conductive layer 641T and the light emitting portion 142. In addition, the bank 616 can be provided to surround side surfaces of the first electrodes 641-1, 641-2, and 641-3 and side surfaces of the additional pattern AP.

[0150] An interval between the first portion 641M1 of the reflective layer 641M disposed in one sub-pixel SP and the second electrode 143 can be set as a first micro-cavity interval MCI1 through which light having a wavelength corresponding to light emitted from the corresponding sub-pixel SP can be amplified.

[0151] Therefore, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 641T1 of the transparent conductive layer 641T in one sub-pixel SP, can be amplified by constructive interference when it is repeatedly reflected between the first portion 641M1 of the reflective layer 641M provided in the same sub-pixel SP as the corresponding transparent conductive layer 641T and the second electrode 143 through the first microcavity interval MCI1.

[0152] Reference Figure 6 , an interval between the second portion 641M2 of the reflective layer 641M disposed in one subpixel SP and the second electrode 143 can be set as a second microcavity interval MCI2, through which light having a wavelength corresponding to light emitted from the corresponding subpixel SP can be amplified.

[0153] Therefore, the second light L2, which is light emitted from the light emitting portion 142 adjacent to the second portion 641T2 of the transparent conductive layer 641T, can be amplified by constructive interference when repeatedly reflected between the second portion 641M2 of the reflective layer 641M provided in one subpixel SP and the second electrode 143 .

[0154] In a display device 600 according to another embodiment of the present disclosure, a portion of the light emitted from a sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), while another portion of the light emitted from a sub-pixel SP is configured to minimize the change in light intensity according to the viewing angle θ, so that the luminous efficiency of the display device 600 can be improved and the brightness degradation and color coordinate changes according to the viewing angle can be minimized.

[0155] Specifically, in the display device 600 according to still another embodiment of the present disclosure, the first light L1, which is light emitted from the light emitting portion 142 adjacent to the first portion 641T1 of the transparent conductive layer 641T, is amplified by the first microcavity interval MCI1, which is the interval between the first portion 641M1 of the reflective layer 641M provided in the corresponding sub-pixel SP and the second electrode 143. In addition, the second light L2, which is light emitted from the light emitting portion 142 adjacent to the second portion 641T2 of the transparent conductive layer 641T, is amplified by the second microcavity interval MCI2, which is the interval between the second portion 641M2 of the reflective layer 641M provided in one sub-pixel SP and the second electrode 143.

[0156] In this case, compared with the first light L1 amplified by the first microcavity interval MCI1, the second light L2 amplified by the second microcavity interval MCI2 larger than the first microcavity interval MCI1 moves along an optical path with a large interval, so that the light intensity of the second light L2 can be lower than the first light L1. Therefore, the first light L1 with a relatively high light intensity improves the straightness of the light, thereby improving the light intensity at the center viewing angle (0°). In addition, the second light L2 with a relatively low light intensity can have a reduced straightness, so that the second light L2 can be detected even at a relatively wide viewing angle, and the light intensity change according to the viewing angle θ can be minimized. Therefore, the light intensity of the first light L1 emitted from the subpixel SP can be increased, so that the luminous efficiency of the display device 600 can be improved, and the second light L2 can be configured to compensate for the light intensity change according to the viewing angle change of the first light L1, so that the degradation of the brightness according to the viewing angle and the color coordinate change can be minimized. Therefore, in the display device 600 according to another embodiment of the present disclosure, a part of the light emitted from one sub-pixel SP is configured to increase the light intensity at the center viewing angle (0°), and another part of the light emitted from one sub-pixel SP is configured to minimize the change in light intensity according to the change in viewing angle θ. Accordingly, the luminous efficiency of the display device 600 can be improved, and the brightness degradation and color coordinate change according to the viewing angle can be minimized, which can improve the display quality of the display device 600 and provide a high-efficiency, low-power display device 600.

[0157] Exemplary embodiments of the present disclosure can also be described as follows:

[0158] According to aspects of the present disclosure, a display device may include: a substrate on which a plurality of sub-pixels are arranged; a plurality of transistors, which are respectively arranged in the plurality of sub-pixels on the substrate; a plurality of first electrodes, which are respectively arranged on the plurality of transistors, connected to the plurality of transistors, and each include a reflective layer and a transparent conductive layer arranged on the reflective layer; a plurality of light-emitting portions, which are respectively arranged on the plurality of first electrodes; and a second electrode, which is arranged on the light-emitting portion, wherein the transparent conductive layer includes a first portion configured to be adjacent to the reflective layer and a second portion spaced apart from the reflective layer, and wherein a microcavity spacing of light emitted from the light-emitting portion adjacent to the first portion of the transparent conductive layer is different from a microcavity spacing of light emitted from the light-emitting portion adjacent to the second portion of the transparent conductive layer.

[0159] The microcavity spacing of light emitted from the light emitting portion adjacent to the first portion of the transparent conductive layer can be smaller than the microcavity spacing of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer.

[0160] The intensity at a central viewing angle of light emitted from a light emitting portion adjacent to the first portion of the transparent conductive layer can be higher than the intensity at a central viewing angle of light emitted from a light emitting portion adjacent to the second portion of the transparent conductive layer.

[0161] The full width at half maximum of light emitted from the light emitting portion adjacent to the first portion of the transparent conductive layer can be smaller than the full width at half maximum of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer.

[0162] The display device can further include an overcoat layer disposed between the plurality of transistors and the plurality of first electrodes and including a first top surface and a second top surface inclined with respect to the first top surface.

[0163] The reflective layer can include: a first portion configured to be adjacent to the first portion of the transparent conductive layer and disposed on the first top surface; and a second portion spaced apart from the transparent conductive layer and disposed on the second top surface.

[0164] A microcavity interval of light emitted from a light emitting portion adjacent to a first portion of the transparent conductive layer disposed in one of the plurality of sub-pixels can be an interval between a first portion of the reflective layer disposed in the one sub-pixel and the second electrode.

[0165] The microcavity interval of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer disposed in one subpixel can be the interval between the second electrode disposed in one subpixel and the second portion of the reflective layer disposed in another subpixel adjacent to the same subpixel.

[0166] The display device can further include: a bank provided between the second portion of the reflective layer and the second portion of the transparent conductive layer between the plurality of sub-pixels.

[0167] The second top surface of the overcoat layer and the top surface of the bank can include curved surfaces.

[0168] The display device can further include: a bank provided between the second portion of the reflective layer and the second portion of the transparent conductive layer between the plurality of sub-pixels.

[0169] The second top surface of the outer coating layer and the top surface of the bank can include a flat surface inclined with respect to the first top surface of the outer coating layer.

[0170] A second portion of the transparent conductive layer disposed in one sub-pixel among the plurality of sub-pixels can be parallel to a second portion of the reflective layer disposed in another adjacent sub-pixel.

[0171] The display device can further include: an overcoat layer disposed between the plurality of transistors and the plurality of first electrodes and having a flat top surface.

[0172] A reflective layer can be disposed on the top surface of the outer coating.

[0173] The reflective layer can include: a first portion configured to be adjacent to the first portion of the transparent conductive layer; and a second portion spaced apart from the transparent conductive layer.

[0174] A microcavity interval of light emitted from a light emitting portion adjacent to a first portion of the transparent conductive layer disposed in one of the plurality of sub-pixels can be an interval between a first portion of the reflective layer disposed in the one sub-pixel and the second electrode.

[0175] The microcavity interval of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer provided in one sub-pixel can be an interval between the second portion of the reflective layer provided in one sub-pixel and the second electrode.

[0176] The display device can further include: a bank provided between the second portion of the reflective layer and the second portion of the transparent conductive layer between the plurality of sub-pixels.

[0177] The refractive index of the bank can be 1.8 or greater.

[0178] The display device can further include: an additional pattern disposed between the second portion of the transparent conductive layer and the second portion of the reflective layer; and a bank disposed to surround a side surface of the first electrode and a side surface of the additional pattern.

[0179] The additional pattern can be made of the same material as the transparent conductive layer.

[0180] The plurality of sub-pixels can include a first sub-pixel, a second sub-pixel, and a third sub-pixel emitting light beams with different colors.

[0181] The transparent conductive layer can have different thicknesses in the first sub-pixel, in the second sub-pixel, and in the third sub-pixel.

[0182] According to another aspect of the present disclosure, a display device may include: a plurality of sub-pixels; a plurality of transistors, which are respectively arranged in the plurality of sub-pixels; a plurality of first electrodes, which are respectively arranged on the plurality of transistors, connected to the plurality of transistors, and each include a reflective layer and a transparent conductive layer arranged on the reflective layer; a plurality of light-emitting portions, which are respectively arranged on the plurality of first electrodes; and a second electrode, which is arranged on the plurality of light-emitting portions, wherein the transparent conductive layer includes a first portion configured to be adjacent to the reflective layer, and a second portion spaced apart from the reflective layer, wherein light emitted from the light-emitting portion adjacent to the first portion of the transparent conductive layer is amplified by a first microcavity spacing, and light emitted from the light-emitting portion adjacent to the second portion of the transparent conductive layer is amplified by a second microcavity spacing, and wherein a portion of light emitted from one of the plurality of sub-pixels is configured to increase light intensity at a central viewing angle, and another portion of light emitted from one of the sub-pixels is configured to minimize light intensity variation as viewing angle changes.

[0183] The display device can also include an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and including a first top surface and a second top surface inclined relative to the first top surface, wherein the reflective layer includes a first portion configured to be adjacent to the first portion of the transparent conductive layer and disposed on the first top surface, and a second portion spaced apart from the transparent conductive layer and disposed on the second top surface.

[0184] The first microcavity gap is a gap between a first portion of a reflective layer disposed in one subpixel and a second electrode, and the second microcavity gap is a gap between a second electrode disposed in one subpixel and a second portion of a reflective layer disposed in another subpixel adjacent to the one subpixel.

[0185] The display device can also include an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and having a flat top surface, wherein the reflective layer is disposed on the top surface of the outer coating layer, and wherein the reflective layer includes a first portion, the first portion of which is configured to be adjacent to the first portion of the transparent conductive layer, and a second portion, which is spaced apart from the conductive layer.

[0186] The first microcavity interval is an interval between a first portion of the reflective layer disposed in one subpixel and the second electrode, and the second microcavity interval is an interval between a second portion of the reflective layer disposed in one subpixel and the second electrode.

[0187] Although the exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and can be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all aspects and do not limit the present disclosure. The scope of protection of the present disclosure should be interpreted based on the following claims, and all technical concepts within their equivalent scope should be interpreted as falling within the scope of the present disclosure.

Claims

1. A display device, comprising: a substrate, comprising a plurality of sub-pixels disposed on the substrate; a plurality of transistors, wherein the plurality of transistors are respectively disposed in the plurality of sub-pixels on the substrate; a plurality of first electrodes, the plurality of first electrodes being respectively disposed on the plurality of transistors and connected to the plurality of transistors, each of the plurality of first electrodes comprising a reflective layer and a transparent conductive layer disposed on the reflective layer; a plurality of light emitting parts, wherein the plurality of light emitting parts are respectively disposed on the plurality of first electrodes; as well as a second electrode, the second electrode being disposed on the plurality of light emitting portions, Wherein, the transparent conductive layer comprises: a first portion configured to be adjacent to the reflective layer; and a second portion, the second portion being spaced apart from the reflective layer, and The microcavity spacing of light emitted from a light emitting portion adjacent to the first portion of the transparent conductive layer is different from the microcavity spacing of light emitted from a light emitting portion adjacent to the second portion of the transparent conductive layer.

2. The display device according to claim 1, wherein: A microcavity spacing of light emitted from a light emitting portion adjacent to the first portion of the transparent conductive layer is smaller than a microcavity spacing of light emitted from a light emitting portion adjacent to the second portion of the transparent conductive layer.

3. The display device according to claim 1, wherein: The intensity of light emitted from the light emitting portion adjacent to the first portion of the transparent conductive layer at a central viewing angle is higher than the intensity of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer at a central viewing angle.

4. The display device according to claim 1, wherein: The full width at half maximum of light emitted from the light emitting portion adjacent to the first portion of the transparent conductive layer is smaller than the full width at half maximum of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer.

5. The display device according to claim 1, further comprising: an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and including a first top surface and a second top surface inclined relative to the first top surface, Wherein, the reflective layer comprises: a first portion configured to be adjacent to the first portion of the transparent conductive layer and disposed on a first top surface of the overcoat layer; and The second portion is spaced apart from the transparent conductive layer and is disposed on the second top surface of the overcoat layer.

6. The display device according to claim 5, wherein: A microcavity interval of light emitted from a light emitting portion adjacent to a first portion of the transparent conductive layer disposed in one of the plurality of sub-pixels is an interval between a first portion of a reflective layer disposed in the one sub-pixel and the second electrode, and Among them, the microcavity spacing of light emitted from the light-emitting part adjacent to the second part of the transparent conductive layer arranged in the one sub-pixel is the spacing between the second electrode arranged in the one sub-pixel and the second part of the reflective layer arranged in another sub-pixel adjacent to the one sub-pixel.

7. The display device according to claim 5, further comprising: a bank disposed between a second portion of the reflective layer and a second portion of the transparent conductive layer between the plurality of sub-pixels, Wherein, the second top surface of the outer coating layer and the top surface of the bank include curved surfaces.

8. The display device according to claim 5, further comprising: a bank disposed between a second portion of the reflective layer and a second portion of the transparent conductive layer between the plurality of sub-pixels, The second top surface of the outer coating layer and the top surface of the bank include flat surfaces inclined relative to the first top surface of the outer coating layer.

9. The display device according to claim 8, wherein: The second portion of the transparent conductive layer disposed in one of the plurality of sub-pixels is parallel to the second portion of the reflective layer disposed in another sub-pixel adjacent to the one sub-pixel.

10. The display device according to claim 1, further comprising: an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and having a top surface, wherein the reflective layer is disposed on the top surface of the outer coating, and Wherein, the reflective layer comprises: a first portion configured to be adjacent to the first portion of the transparent conductive layer; and The second portion is spaced apart from the transparent conductive layer.

11. The display device according to claim 10, wherein: A microcavity interval of light emitted from a light emitting portion adjacent to a first portion of the transparent conductive layer disposed in one of the plurality of sub-pixels is an interval between a first portion of a reflective layer disposed in the one sub-pixel and the second electrode, and The microcavity interval of light emitted from the light emitting portion adjacent to the second portion of the transparent conductive layer disposed in the one sub-pixel is the interval between the second portion of the reflective layer disposed in the one sub-pixel and the second electrode.

12. The display device according to claim 10, further comprising: A bank is provided between the second portion of the reflective layer and the second portion of the transparent conductive layer between the plurality of sub-pixels.

13. The display device according to claim 12, wherein: The refractive index of the bank is about 1.8 or greater.

14. The display device according to claim 10, further comprising: an additional pattern disposed between the second portion of the transparent conductive layer and the second portion of the reflective layer; as well as A bank is provided to surround a side surface of the first electrode and a side surface of the additional pattern.

15. The display device according to claim 14, wherein: The additional pattern is made of the same material as the transparent conductive layer.

16. The display device according to claim 1, wherein: The plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel, each of which is configured to emit light beams having different colors, and The transparent conductive layer has different thicknesses in the first sub-pixel, in the second sub-pixel, and in the third sub-pixel.

17. A display device comprising: Multiple sub-pixels; a plurality of transistors, wherein the plurality of transistors are respectively arranged in the plurality of sub-pixels; a plurality of first electrodes, the plurality of first electrodes being respectively disposed on the plurality of transistors and connected to the plurality of transistors, each of the plurality of first electrodes comprising a reflective layer and a transparent conductive layer disposed on the reflective layer; a plurality of light emitting parts, wherein the plurality of light emitting parts are respectively arranged on the plurality of first electrodes; as well as a second electrode, the second electrode being disposed on the plurality of light emitting portions, The transparent conductive layer includes a first portion configured to be adjacent to the reflective layer, and a second portion spaced apart from the reflective layer. wherein light emitted from a light emitting portion adjacent to a first portion of the transparent conductive layer is amplified by a first microcavity spacing, and light emitted from a light emitting portion adjacent to a second portion of the transparent conductive layer is amplified by a second microcavity spacing, and Part of the light emitted from one of the plurality of sub-pixels is configured to increase light intensity at a center viewing angle, while another part of the light emitted from the one sub-pixel is configured to minimize light intensity variation with viewing angle.

18. The display device according to claim 17, further comprising: an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and including a first top surface and a second top surface inclined relative to the first top surface, Wherein, the reflective layer comprises: a first portion configured to be adjacent to the first portion of the transparent conductive layer and disposed on a first top surface of the overcoat layer; and The second portion is spaced apart from the transparent conductive layer and is disposed on the second top surface of the overcoat layer.

19. The display device according to claim 18, wherein: The first microcavity gap is a gap between a first portion of the reflective layer disposed in the one sub-pixel and the second electrode, and The second microcavity gap is a gap between the second electrode disposed in the one sub-pixel and a second portion of a reflective layer disposed in another sub-pixel adjacent to the one sub-pixel.

20. The display device according to claim 17, further comprising: an outer coating layer disposed between the plurality of transistors and the plurality of first electrodes and having a top surface, wherein the reflective layer is disposed on the top surface of the outer coating, and Wherein, the reflective layer comprises: a first portion, the first portion of which is arranged to be adjacent to the first portion of the transparent conductive layer; and The second portion is spaced apart from the transparent conductive layer.

21. The display device according to claim 20, wherein: The first microcavity gap is a gap between a first portion of the reflective layer disposed in the one sub-pixel and the second electrode, and The second microcavity gap is a gap between a second portion of the reflective layer and the second electrode disposed in the one sub-pixel.

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