Organic light-emitting display devices

Abstract

An organic light-emitting display device includes a substrate including a plurality of pixels. The organic light-emitting display device also includes a plurality of organic light-emitting diodes (OLEDs) on the substrate corresponding to the plurality of pixels. The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel that emit light of different colors. Each of the plurality of organic light-emitting diodes includes a first electrode, a light-emitting portion on the first electrode, and a second electrode on the light-emitting portion. The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0179655 filed on December 31, 2019, in the Korean Intellectual Property Office, the entire contents of which are hereby incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to an organic light emitting display device, and more particularly, to an organic light emitting display device that minimizes color variation and brightness variation according to viewing angles. Background Art

[0004] Unlike liquid crystal display devices, organic light-emitting display devices do not require a separate light source. Therefore, organic light-emitting display devices can be manufactured to have a light weight and a small thickness. In addition, since organic light-emitting display devices are driven at a low voltage, they are beneficial not only in terms of power consumption, but also in terms of color realization, response speed, viewing angle, and contrast (CR). Therefore, light-emitting display devices are being studied as the next generation of displays.

[0005] An organic light-emitting display device is a self-emitting display device and uses an organic light-emitting diode, in which electrons and holes from a cathode for injecting electrons and an anode for injecting holes are injected into a light-emitting layer, and excitons formed by coupling the injected electrons and holes drop from an excited state to a ground state to emit light.

[0006] Organic light emitting display devices may be classified into a top emission type, a bottom emission type, and a dual emission type according to a direction of light emission, and may also be classified into a passive matrix type and an active matrix type according to a driving method. Summary of the Invention

[0007] The inventors of the present disclosure have developed an organic light emitting diode having a multi-stack structure that uses a stack of multiple light emitting parts to achieve improved efficiency and lifespan characteristics of an organic light emitting display device.

[0008] In an organic light-emitting diode (OLED) with a multi-stack structure, an emission region, where light is emitted through the recombination of electrons and holes, is located in each of the multiple light-emitting sections. Therefore, an OLED with a multi-stack structure has high efficiency and can be driven with low current, thereby improving the lifespan of the OLED.

[0009] However, the inventors of the present disclosure have recognized that when an organic light-emitting diode having the same structure is applied to all pixels emitting light of different colors, the color or brightness of a particular pixel may change depending on the viewing angle. For example, there is a problem in that an optimized structure cannot be applied to pixels emitting light of different colors, thereby degrading display quality.

[0010] Therefore, the inventors of the present disclosure have invented an improved organic light emitting display device in which different structures are applied to respective pixels emitting light of different colors.

[0011] An aspect of the present disclosure is to provide an organic light emitting display device that configures a thickness of a first electrode of a first pixel and a thickness of a first electrode of a second pixel to be different from each other to improve color viewing angle characteristics.

[0012] Another aspect of the present disclosure is to provide an organic light emitting display device that configures a thickness of a first electrode of a second pixel and a thickness of a first electrode of a third pixel to be different from each other to improve brightness viewing angle characteristics.

[0013] Another aspect of the present disclosure is to provide an organic light emitting display apparatus that improves display quality while minimizing a light process.

[0014] Additional features and aspects will be set forth in the following description, and in part will become apparent from the description or may be learned through practice of the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and obtained through the structures particularly pointed out in the written description, or the structures derived therefrom, as well as the claims and drawings thereof.

[0015] According to an embodiment of the present disclosure, an organic light-emitting display device is provided. The organic light-emitting display device includes a substrate including a plurality of pixels. The organic light-emitting display device also includes a plurality of organic light-emitting diodes arranged on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Each of the plurality of organic light-emitting diodes includes a first electrode, a light-emitting portion on the first electrode, and a second electrode on the light-emitting portion. The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel.

[0016] According to another embodiment of the present disclosure, an organic light-emitting display device is provided. The organic light-emitting display device includes a substrate including a plurality of pixels. The organic light-emitting display device also includes a plurality of organic light-emitting diodes arranged on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels include white pixels, red pixels, green pixels, and blue pixels. Each of the plurality of organic light-emitting diodes includes a first electrode, a first light-emitting portion arranged on the first electrode and including a blue light-emitting layer, a second light-emitting portion arranged on the first light-emitting portion and including a red light-emitting layer and two yellow-green light-emitting layers, a third light-emitting portion arranged on the second light-emitting portion and including a blue light-emitting layer, and a second electrode on the third light-emitting portion. The thickness of the first electrode of the white pixel is different from the thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from the thickness of the first electrode of the green pixel.

[0017] According to another embodiment of the present disclosure, an organic light-emitting display device is provided. The organic light-emitting display device includes: a substrate including a plurality of pixels; and a plurality of organic light-emitting diodes, the plurality of organic light-emitting diodes being arranged on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors, and each of the plurality of pixels has a microcavity structure corresponding to the light emitted from the pixel. Each of the plurality of organic light-emitting diodes includes: a first electrode; a light-emitting portion on the first electrode; and a second electrode on the light-emitting portion. The microcavity structure of the first pixel is different from the microcavity structure of the second pixel, and the microcavity structure of the second pixel is different from the microcavity structure of the third pixel.

[0018] Other devices, systems, methods, features and advantages will be or will become apparent to those skilled in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included herein, be within the scope of the present disclosure, and be protected by the appended claims. Nothing in this section should be construed as limiting those claims. Further aspects and advantages are discussed below in conjunction with embodiments of the present disclosure. It should be understood that the foregoing general description and the following detailed description of the present disclosure are exemplary and illustrative and are intended to provide further explanation of the claimed disclosure.

[0019] According to some embodiments of the present disclosure, the thickness of the anode electrode of the white pixel and the thickness of the anode electrode of the red pixel are configured to be different from each other to minimize color variation according to a viewing angle.

[0020] According to some embodiments of the present disclosure, the thickness of the anode electrode of the red pixel and the thickness of the anode electrode of the green pixel are configured to be different from each other to minimize a brightness variation according to a viewing angle.

[0021] According to some embodiments of the present disclosure, thicknesses of anodes of pixels emitting light of different colors are configured to be different from each other, improving display quality with minimal processes.

[0022] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain various principles of the disclosure.

[0024] Figure 1 is a plan view of an organic light emitting display device according to an exemplary embodiment of the present disclosure.

[0025] Figure 2 It is along Figure 1 A cross-sectional view taken along line II-II'.

[0026] Figure 3 It shows Figure 2 View of the structure of an organic light-emitting diode.

[0027] Figure 4 is a cross-sectional view of an organic light emitting display device according to an exemplary embodiment of the present disclosure.

[0028] Figure 5 is a graph showing the cavity enhancement factor according to the wavelength at each viewing angle.

[0029] Figure 6 is a graph showing brightness according to viewing angles.

[0030] Figure 7 Color viewing angle characteristics according to the thickness of the first electrode of the first pixel and the thickness of the first hole transport layer are shown.

[0031] Figures 8A to 8D Luminance characteristics according to the thickness of the first electrode and the thickness of the first hole transport layer of the first pixel, the second pixel, the third pixel, and the fourth pixel are shown.

[0032] Figures 9 to 14 are schematic cross-sectional views of organic light emitting display devices according to various exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0033] By referring to the exemplary embodiments and drawings described in detail below, the advantages and features of the present disclosure and the methods for achieving the advantages and features will become 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 as examples so that those skilled in the art can fully understand the disclosure of the present disclosure and the scope of the present disclosure. Therefore, the present disclosure will be limited only by the scope of the appended claims.

[0034] 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 specification, the same reference numerals generally represent the same elements. In addition, in the following description of the present disclosure, detailed explanations of known related arts may be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Unless used herein, terms such as "including," "having," and "comprising" are generally intended to allow the addition of other components. Unless expressly stated otherwise, any reference to the singular may include the plural.

[0035] Even if not explicitly stated, the components are construed as including the ordinary error range.

[0036] When terms such as "on," "above," "below," and "near" are used to describe the positional relationship between two components, unless these terms are used with the terms "immediately" or "directly," one or more components may be located between the two components.

[0037] When an element or layer is referred to as being “on” another element or layer, the other layer (or layers) or element (or elements) may be directly on or interposed between the other element.

[0038] Although the terms "first," "second," and the like are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from other components and do not define any order. Therefore, the first component mentioned below may be the second component in the technical concept of the present disclosure.

[0039] Throughout the specification, like reference numerals generally refer to like elements.

[0040] 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 illustrated components.

[0041] The features of the various embodiments of the present disclosure may be partially or completely adhered to or combined with each other and may be interlocked and operated in various technical ways, and the embodiments may be performed independently of each other or in combination with each other.

[0042] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 is a plan view of an organic light emitting display device according to an exemplary embodiment of the present disclosure. Figure 2 It is along Figure 1 All components of the organic light emitting display device according to all embodiments of the present disclosure are operably coupled and configured.

[0044] Reference Figure 1 and Figure 2 , the organic light emitting display device 100 includes a substrate 110 , a transistor 120 , a color filter 130 , an organic light emitting diode 140 , and an encapsulation substrate 150 .

[0045] The organic light-emitting display device 100 may be configured as a bottom emission type. For example, in the organic light-emitting display device 100 according to the exemplary embodiment of the present disclosure, light may be emitted to the rear surface of the substrate 110. According to the bottom emission type, light emitted from the organic light-emitting diode 140 is emitted to the lower portion of the substrate 110 on which the organic light-emitting diode 140 is formed. According to the bottom emission type, in order to allow the light emitted from the organic light-emitting diode 140 to travel to the lower portion of the substrate 110, the first electrode 141 may be formed of a transparent conductive material, and the second electrode 143 may be formed of a metal material having high reflectivity, which will be described below.

[0046] Reference Figure 1 The substrate 110 supports and protects some components of the organic light-emitting display device 100. The substrate 110 may be formed of a flexible plastic material. Furthermore, since the organic light-emitting display device 100 is a bottom-emission type, the substrate 110 may be formed of a transparent insulating material to allow light to pass to the lower portion of the substrate 110. For example, the substrate 110 may be formed of transparent polyimide (PI).

[0047] The substrate 110 includes a display area AA and a non-display area NA.

[0048] The display area AA is provided at the center of the substrate 110, and an image is displayed in the display area of ​​the organic light-emitting display device 100. Display elements and various driving elements for driving the display elements may be provided in the display area AA. For example, the display element may be configured by an organic light-emitting diode 140 including a first electrode 141, a light-emitting portion 142, and a second electrode 143. Furthermore, various driving elements for driving the display elements, such as transistors, capacitors, or wiring, may be provided in the display area AA.

[0049] A plurality of pixels PX may be included in the display area AA. The plurality of pixels PX may be intersections of 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. Here, the first direction may be Figure 1 The horizontal direction, and the second direction can be Figure 1 The plurality of pixels PX may include a plurality of first pixels PX1, a plurality of second pixels PX2, a plurality of third pixels PX3, and a plurality of fourth pixels PX4 that emit light having different wavelengths. For example, the plurality of first pixels PX1 may be white pixels, the plurality of second pixels PX2 may be red pixels, the plurality of third pixels PX3 may be green pixels, and the plurality of fourth pixels PX4 may be blue pixels.

[0050] A pixel PX is the smallest unit configuring a screen, and each of the plurality of pixels PX may include an organic light-emitting diode 140 and a driving element. The driving element may include a switching transistor and a driving transistor. The driving element may be electrically connected to signal lines, such as gate lines and data lines connected to a gate driver and a data driver provided in the non-display area NA.

[0051] The non-display area NA is provided in the peripheral area and the non-display area of ​​the substrate 110 and does not display an image. The non-display area NA is provided to surround the display area AA. Various components for driving the plurality of pixels PX provided in the display area AA may be provided in the non-display area NA. For example, a driver IC, a driver circuit, a signal line, and a flexible film that provide signals for driving the plurality of pixels PX may be provided. The driver IC may include a gate driver and a data driver, etc. The driver IC and the driver circuit may be provided in a gate-in-panel (GIP) manner, a chip-on-film (COF) manner, a tape automated bonding (TAB) manner, a tape carrier package (TCP) manner, or a chip-on-glass (COG) manner, etc.

[0052] In the following, reference will be made to Figure 2 One pixel PX provided in the display area AA of the organic light emitting display apparatus 100 is described in more detail. Figure 2 The cross-sectional view shown may be a cross-sectional view of the second pixel PX2. Figure 2 The structure of the second pixel PX2 can be applied not only to the third pixel PX3 and the fourth pixel PX4 in the same manner. In addition, except that the color filter 130 is not provided, as shown in FIG. Figure 2 The same structure in FIG. 1 can also be applied to the first pixel PX1 .

[0053] Reference Figure 2 , a buffer layer 111 is provided on the substrate 110. The buffer layer 111 can enhance the adhesion between the layers on the buffer layer 111 and the substrate 110. In addition, the buffer layer 111 can block the alkaline components discharged from the substrate 110 and inhibit the diffusion of moisture and / or oxygen penetrating from the outside of the substrate 110. The buffer layer 111 can be composed of a single layer or multiple layers of silicon nitride (SiNx) or silicon oxide (SiOx), but is not limited thereto. In addition, the buffer layer 111 can be omitted based on the type and material of the substrate 110 and the structure and type of the transistor 120.

[0054] The transistor 120 is provided on the buffer layer 111 to drive the organic light emitting diode 140. The transistor 120 may be provided in each of the plurality of pixels of the display area AA. The transistor 120 provided in each of the plurality of pixels may be used as a driving element of the organic light emitting display device 100. For example, the transistor 120 may 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, or a field effect transistor FET, but is not limited thereto. In the following, the transistor 120 is assumed to be a thin film transistor, but is not limited thereto.

[0055] The transistor 120 includes an active layer 121 , a gate electrode 122 , a source electrode 123 , and a drain electrode 124 . Figure 2 The illustrated transistor 120 is a top-gate thin film transistor in which a gate electrode 122 is provided on an active layer 121. However, the transistor 120 is not limited thereto, and may be implemented as a bottom-gate thin film transistor.

[0056] The active layer 121 of the transistor 120 is disposed on the buffer layer 111. When the transistor 120 is driven, a channel is formed in the active layer 121. The active layer 121 may be formed of an oxide semiconductor, amorphous silicon (a-Si), polycrystalline silicon (poly-Si), or an organic semiconductor, but is not limited thereto.

[0057] The gate insulating layer 112 is provided on the active layer 121. The gate insulating layer 112 may be formed as a single layer or multiple layers of silicon nitride SiNx or silicon oxide SiOx as an inorganic material. In the gate insulating layer 112, contact holes are formed: 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 holes. The gate insulating layer 112 may be formed as follows: Figure 2 As shown, it is formed on the entire surface of the substrate 110 or patterned to have the same width as the gate electrode 122 , but is not limited thereto.

[0058] The gate electrode 122 is provided on the gate insulating layer 112. The gate electrode 122 is provided on the gate insulating layer 112 to overlap with the channel region of the active layer 121. The gate electrode 122 may be formed of various metal materials such as any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof, but is not limited thereto.

[0059] An interlayer insulating layer 113 is provided on the gate electrode 122. The interlayer insulating layer 113 may be formed as a single layer or multiple layers of silicon nitride SiNx or silicon oxide SiOx, which are inorganic materials. Contact holes are formed in the interlayer insulating layer 113, through which the source electrode 123 and the drain electrode 124 respectively contact the source region and the drain region of the active layer 121.

[0060] The source electrode 123 and the 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 contact holes formed in the gate insulating layer 112 and the interlayer insulating layer 113. The source electrode 123 and the drain electrode 124 may be formed of any one of various metal materials such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy of two or more thereof, or a multilayer thereof. However, the present disclosure is not limited thereto.

[0061] For ease of description, Figure 2 , only the driving transistor among the various transistors 120 included in the display device 100 is shown, but other transistors such as a switching transistor may also be provided.

[0062] Reference Figure 2 , a passivation layer 114 for protecting the transistor 120 is provided on the transistor 120. A contact hole for exposing the drain electrode 124 of the transistor 120 is formed on the passivation layer 114. Even in Figure 2In the embodiment, a contact hole for exposing the drain electrode 124 is formed in the passivation layer 114, and a contact hole for exposing the source electrode 123 may also be formed. The passivation layer 114 may be configured as a single layer or multiple layers of silicon nitride SiNx or silicon oxide SiOx. However, according to an exemplary embodiment of the present disclosure, the passivation layer 114 may be omitted.

[0063] The color filter 130 is disposed on the passivation layer 114. The color filter 130 may be disposed to correspond to the emission area defined by the bank 116. The color filter 130 converts the light emitted from the light emitting portion 142 of the organic light emitting diode 140 into light having a specific color. Figure 2 The second pixel PX2 shown is a red pixel, so the color filter 130 can be a red color filter. In addition, the third pixel PX3, which is a green pixel, includes a green color filter, and the fourth pixel PX4, which is a blue pixel, includes a blue color filter. The white light emitted from the light emitting portion 142 is converted into red light, green light, and blue light by the color filter 130 of the corresponding pixel PX. At the same time, the color filter 130 may not be provided in the first pixel PX1, which is a white pixel.

[0064] An overcoat layer 115 is provided on the passivation layer 114 and the color filter 130 to planarize the upper portion of the transistor 120. A contact hole exposing the drain electrode 124 of the transistor 120 is formed on the overcoat layer 115. Figure 2 In the embodiment, a contact hole for exposing the drain electrode 124 is formed in the overcoat layer 115, and a contact hole for exposing the source electrode 123 may also be formed. The overcoat layer 115 may be formed of any one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, benzocyclobutene, and photoresist, but is not limited thereto.

[0065] Reference Figure 2 , an organic light emitting diode 140 is provided on the overcoat layer 115. The organic light emitting diode 140 includes a first electrode 141 formed on the overcoat layer 115 to be electrically connected to the drain electrode 124 of the transistor 120; a light emitting portion 142 provided on the first electrode 141; and a second electrode 143 formed on the light emitting portion 142. Here, the first electrode 141 may be an anode electrode, and the second electrode 143 may be a cathode electrode.

[0066] The first electrode 141 is provided on the overcoat layer 115 to be electrically connected to the drain electrode 124 through a contact hole formed in the passivation layer 114 and the overcoat layer 115. The first electrode 141 may be formed of a transparent conductive material having a high work function to supply holes to the light emitting portion 142. For example, the first electrode 141 may be formed of a transparent conductive oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), and tin oxide (TO), but is not limited thereto.

[0067] Despite Figure 2 , the first electrode 141 is shown to be electrically connected to the drain electrode 124 of the transistor 120 through a contact hole, but according to the type of the transistor 120 and the design method of the driving circuit, the first electrode 141 can also be configured to be electrically connected to the source electrode 123 of the transistor 120 through a contact hole.

[0068] The bank 116 is provided on the first electrode 141 and the overcoat layer 115. The bank 116 may cover the edge or periphery of the first electrode 141 of the organic light-emitting diode 140 to define the emission area. The bank 116 is provided at the boundary between adjacent pixels to reduce color mixing of light emitted from the organic light-emitting diode 140 in each of the multiple pixels. The bank 116 may be formed of an organic material. For example, the bank 116 may be formed of a polyimide resin, an acrylic resin, or a benzocyclobutene resin, but is not limited thereto.

[0069] The light emitting portion 142 is provided on the first electrode 141. The light emitting portion 142 may be a white light emitting layer that emits white light. The white light emitted from the light emitting portion 142 may be converted into any one of red, green, and blue by the color filter 130. In addition, the light emitting portion 142 may further 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, or an electron transport layer. This will be referred to below. Figure 3 Provide a description.

[0070] The second electrode 143 is provided on the light emitting portion 142. The second electrode 143 supplies electrons to the light emitting portion 142. The second electrode 143 may be formed of a conductive material having a low work function. For example, the second electrode 143 may be formed of any one or more of opaque conductive metals such as magnesium (Mg), silver (Ag), aluminum (Al), calcium (Ca), or alloys thereof, but is not limited thereto.

[0071] Reference Figure 2, the encapsulation layer 117 is provided on the organic light emitting diode 140. The encapsulation layer 117 may cover the organic light emitting diode 140. The encapsulation layer 117 may protect the organic light emitting diode 140 from moisture, oxygen, and external impact. The encapsulation layer 117 may be formed by alternately stacking a plurality of inorganic layers and a plurality of organic layers. For example, the inorganic layer may be formed of an inorganic material such as silicon nitride SiNx, silicon oxide SiOx, and aluminum oxide AlOx, and the organic layer may be formed of an epoxy resin or an acrylic polymer, but they are not limited thereto.

[0072] The encapsulation substrate 150 is disposed on the encapsulation layer 117. The encapsulation substrate 150 can protect the organic light emitting diode 140 from moisture, oxygen, and external impact together with the encapsulation layer 117. The encapsulation substrate 150 can be formed of a metal material such as aluminum (Al), nickel (Ni), chromium (Cr), or an alloy material of iron (Fe) and nickel, but is not limited thereto.

[0073] Reference Figure 2 , the adhesive member 118 is provided between the encapsulation layer 117 and the encapsulation substrate 150. The adhesive member 118 can bond the encapsulation layer 117 and the encapsulation substrate 150 to each other. The adhesive member 118 is formed of a material having adhesive properties and can be a thermosetting or naturally curable adhesive. For example, the adhesive member 118 can be formed of an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA), but is not limited thereto.

[0074] In the following, reference will be made to Figure 3 The structure of the organic light emitting diode 140 according to an exemplary embodiment of the present disclosure is described in detail.

[0075] Figure 3 It shows Figure 2 View of the structure of an organic light-emitting diode. Figure 3 The structure of the organic light emitting diode 140 may be applied to a portion or all of the plurality of pixels PX of the organic light emitting display device 100 .

[0076] Reference Figure 3 The organic light emitting diode 140 includes a first electrode 141 , a light emitting portion 142 and a second electrode 143 .

[0077] The light emitting portion 142 is provided between the first electrode 141 and the second electrode 143. The light emitting portion 142 is a region that emits light by coupling electrons and holes supplied from the first electrode 141 and the second electrode 143. The light emitting portion 142 includes a first light emitting portion 142-1, a second light emitting portion 142-2, and a third light emitting portion 142-3.

[0078] The first light-emitting portion 142-1 is disposed on the first electrode 141. The first light-emitting portion 142-1 includes a first hole transport layer 211, a second hole transport layer 212, a first light-emitting layer 221, a first electron transport layer 231, and a first N-type charge generation layer 241. Because the first light-emitting layer 221 is a fluorescent light-emitting layer, the first light-emitting portion 142-1 can be a fluorescent light-emitting portion. As another example, the first light-emitting portion 142-1 may not include the first N-type charge generation layer 241.

[0079] The first hole transport layer 211 and the second hole transport layer 212 are sequentially disposed on the first electrode 141. For example, the first hole transport layer 211 and the second hole transport layer 212 are disposed on the first electrode 141. The first hole transport layer 211 and the second hole transport layer 212 are organic layers that smoothly transfer holes from the first electrode 141 to the first light emitting layer 221.

[0080] The first hole transport layer 211 may be configured by applying one or more layers or one or more materials. For example, the first hole transport layer 211 and the second hole transport layer 212 may be formed of any one or more materials including NPD (N, N'-bis(naphthalene-1-yl)-N, N'-bis(phenyl)-2, 2'-dimethylbenzidine), NPB (N, N'-bis(naphthalene-1-yl)-N, N'-bis(phenyl)-benzidine), TPD (N, N'-bis-(3-methylphenyl)-N, N'-bis-(phenyl)-benzidine), spiro-TAD (2, 2', 7, 7'-tetrakis(N, N-diphenylamino)-9, 9'-spirofluorene) and MTDATA (4, 4', 4"-tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine), but are not limited thereto.

[0081] The thickness of the first hole transport layer 211 may be to When the thickness of the first hole transport layer 211 is less than When the thickness of the first hole transport layer 211 exceeds When the thickness of the organic light-emitting display device 100 is too thick due to the thickness of the first hole transport layer 211 .

[0082] The second hole transport layer 212 can function as an electron blocking layer (EBL). The electron blocking layer is an organic layer that blocks electrons injected into the first light-emitting layer 221 from passing through the first hole transport layer 211 and the second hole transport layer 212. The electron blocking layer blocks the movement of electrons, improving the coupling of holes and electrons in the first light-emitting layer 221 and increasing the emission efficiency of the first light-emitting layer 221. The electron blocking layer can be provided on a different layer from the second hole transport layer 212. As another example, the second hole transport layer 212 can be omitted.

[0083] In the first light emitting layer 221, holes supplied through the first electrode 141 recombine with electrons supplied through the second electrode 143 to generate excitons. Here, the region where the excitons are generated is referred to as an emission region (or emission zone) or a recombination zone.

[0084] The first light emitting layer 221 is provided between the second hole transport layer 212 and the first electron transport layer 231. The first light emitting layer 221 as a fluorescent emission layer is provided in the first light emitting portion 142-1 where excitons are formed and includes a material that emits light of a specific color. The first light emitting layer 221 may include a material that emits blue light.

[0085] The first light-emitting layer 221 may have a host-dopant system. For example, the first light-emitting layer 221 may have a system in which an emitting dopant material having a smaller weight ratio is doped on a host material having a larger weight ratio. The host of the first light-emitting layer 221 may be configured from a single material or a mixed host formed from a mixture of materials. A blue fluorescent dopant material is doped on the first light-emitting layer 221 including a single host material or a mixed host material. For example, the first light-emitting layer 221 is a blue light-emitting layer, and the wavelength of light emitted from the first light-emitting layer 221 may range from 440 nm to 480 nm.

[0086] The blue fluorescent dopant material is a material capable of emitting blue light. The EL spectrum of light emitted from the first light emitting layer 221 doped with the blue fluorescent dopant material may have a peak in the blue wavelength region, a peak in the deep blue wavelength region, or a peak in the sky blue wavelength region.

[0087] The host material of the first light emitting layer 221 can be formed by mixing one or more of Alq3 (tris(8-hydroxyquinoline)aluminum), ADN (9,10-di(naphtha-2-yl)anthracene), and BSBF (2-(9,9-spirofluorene-2-yl)-9,9-spirofluorene), but is not limited thereto.

[0088] The blue fluorescent dopant material of the first light-emitting layer 221 can be formed of one or more materials including a pyrene series material having an alternative aromatic amine compound, an iridium (Ir) ligand complex including FIrPic (bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium) or Ir(ppy)3(fatris(2-phenylpyridine)iridium)(tris(2-phenylpyridine)iridium), spiro-DPVBi, spiro-6P, spiro-BDAVBi (2,7-bis[4-(diphenylamino)phenyl]-9,9'-spirofluorene), distyrylbenzene (DSB), distyrylarylene (DSA), a PFO-based polymer, and a PPV-based polymer, but is not limited thereto.

[0089] The first electron transport layer 231 is provided on the first light emitting layer 221. Electrons are supplied from the first N-type charge generation layer 241 to the first electron transport layer 231. The first electron transport layer 231 may transfer the supplied electrons to the first light emitting layer 221.

[0090] The first electron transport layer 231 may function as a hole blocking layer HBL, which may suppress holes that do not participate in recombination from leaking from the first light emitting layer 221 .

[0091] The first electron transport layer 231 may be formed of one or more of PBD (2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole), TAZ (3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole), BAlq (bis(2-methyl-8-quinolyl)-4-(phenylphenolyl)aluminum), Liq (8-hydroxyquinolyl-lithium), TPBi (2,2',2"-(1,3,5-benzodiphenyl)-tris(1-phenyl-1-hydrogen-benzimidazole), Liq (8-hydroxyquinolate lithium), and BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), but is not limited thereto.

[0092] The first N-type charge generation layer 241 is provided on the first electron transport layer 231. The first N-type charge generation layer 241 injects electrons into the first light emitting portion 142-1. The first N-type charge generation layer 241 is provided between the first light emitting portion 142-1 and the second light emitting portion 142-2 adjacent to the first light emitting portion 142-1 to supply charges to the first light emitting portion 142-1.

[0093] The first N-type charge generation layer 241 may include an N-type dopant material and an N-type host material. The N-type dopant material may be a metal from Group 1 or Group 2 of the periodic table, an organic material that can inject electrons, or a mixture thereof. For example, the N-type dopant material may be any one of an alkali metal and an alkaline earth metal. For example, the first N-type charge generation layer 241 may be formed of an organic layer doped with an alkali metal such as lithium (Li), sodium (Na), potassium (K), or cesium (Cs), or an alkaline earth metal such as magnesium (Mg), strontium (Sr), barium (Ba), or radium (Ra), but is not limited thereto. The N-type main material can be formed of a material capable of transporting electrons, for example, it can be formed of one or more of Alq3 (tris(8-hydroxyquinolinyl)aluminum), Liq (8-hydroxyquinolinyl lithium), PBD (2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole), TAZ (3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole), spiro-PBD and BAlq (bis(2-methyl-8-quinolinic acid)-4-(phenylphenol)aluminum), SAlq, TPBi (2,2',2"-(1,3,5-benzotriazole)-tris(1-phenyl-1-hydrogen-benzimidazole), oxadiazole, triazole, phenanthroline, benzoxazole and benzothiazole, but is not limited thereto.

[0094] The thickness of the first light emitting portion 142-1 excluding the first hole transport layer 211 may be to Since the thickness of the first hole transport layer 211 is to Therefore, the total thickness of the first light emitting portion 142-1 can be to In addition, the distance between the center of the first light emitting layer 221 and the first surface of the second electrode 143 may be to

[0095] Second light-emitting portion 142-2 is disposed on first light-emitting portion 142-1. Second light-emitting portion 142-2 includes first P-type charge generation layer 242, third hole transport layer 213, second light-emitting layer 222, third light-emitting layer 223, fourth light-emitting layer 224, second electron transport layer 232, and second N-type charge generation layer 243. Because second light-emitting layer 222, third light-emitting layer 223, and fourth light-emitting layer 224 are phosphorescent emission layers, second light-emitting portion 142-2 may be a phosphorescent emission portion. As another example, second light-emitting portion 142-2 may not include first P-type charge generation layer 242 and second N-type charge generation layer 243.

[0096] The first P-type charge generation layer 242 is provided on the first N-type charge generation layer 241. The first P-type charge generation layer 242 injects holes into the second light-emitting portion 142-2. The first P-type charge generation layer 242 is provided between the first light-emitting portion 142-1 and the second light-emitting portion 142-2 adjacent to each other to supply charges to the second light-emitting portion 142-2.

[0097] The first P-type charge generation layer 242 may include a P-type dopant material and a P-type host material. The P-type dopant material may be formed of a metal oxide, an organic material such as tetrafluorotetracyanoquinodimethane (F4-TCNQ), HAT-CN (hexaazatriphenylene-hexanitrile) or hexaazatriphenylene, or a metal material such as V2O5, MoOx, and WO3, but is not limited thereto. The P-type main material can be formed of a material capable of transporting holes, for example, it can be formed of any one or more materials including NPD (N,N-dinaphthyl-N,N'-diphenylbenzidine) (N,N'-bis(naphthalene-1-yl)-N,N'-bis(phenyl)-2,2'-dimethylbenzidine), TPD (N,N'-bis-(3-methylphenyl)-N,N'-bis-(phenyl)-benzidine) and methyl tert-butyl ether (4,4',4"-tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine), but is not limited thereto.

[0098] The third hole transport layer 213 is provided on the first P-type charge generation layer 242. The third hole transport layer 213 is an organic layer that smoothly transfers holes from the first P-type charge generation layer 242 to the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224. The third hole transport layer 213 is substantially the same as the first hole transport layer 211 and the second hole transport layer 212 of the first light-emitting portion 142-1, and therefore redundant description will be omitted.

[0099] The second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 are sequentially arranged between the third hole transport layer 213 and the second electron transport layer 232. For example, the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 are arranged between the third hole transport layer 213 and the second electron transport layer 232. The second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224, which are phosphorescent emission layers, are arranged in the second light-emitting portion 142-2 that forms excitons and include materials that emit light of a specific color. The second light-emitting layer 222 includes a material that emits red light, and the third light-emitting layer 223 and the fourth light-emitting layer 224 include materials that emit yellow-green light. The fourth light-emitting layer 224 can be omitted. For example, the fourth light-emitting layer 224 can include a material that emits green light. For example, the second light-emitting portion 142-2 can be configured by the second light-emitting layer 222 and the third light-emitting layer 223.

[0100] Similar to the first light-emitting layer 221, the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 can have a host-dopant system. Each of the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 can include a single host or a mixed host and at least one dopant. When the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 include a mixed host, the mixed host can include a hole-type host and an electron-type host. When the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224 are configured with a mixed host or a pre-mixed host, the host can be uniformly deposited in the light-emitting layer, thereby improving the efficiency of the light-emitting layer.

[0101] The second light-emitting layer 222 as a phosphorescent emission layer may include a first hole-type host and a first electron-type host, and the second light-emitting layer 222 may be doped with a red phosphorescent dopant material. For example, the second light-emitting layer 222 is a red light-emitting layer, and the wavelength of light emitted from the second light-emitting layer 222 may be in the range of 600 nm to 650 nm.

[0102] The red phosphorescent dopant material is a material capable of emitting red light. The EL spectrum of light emitted from the second light emitting layer 222 doped with the red phosphorescent dopant material may have a peak in a red wavelength range.

[0103] The host material of the second light emitting layer 222 may be formed by mixing one or more of CBP (4,4'-bis(carbazol-9-yl)biphenyl) and MCP (1,3-bis(carbazol-9-yl)benzene), but is not limited thereto.

[0104] The red phosphorescent dopant material of the second light-emitting layer 222 can be formed by any one or more materials including an iridium (Ir) ligand complex, PtOEP (octaethylporphyrin platinum) PBD:Eu(DBM)3(Phen), and perylene. The iridium (Ir) ligand complex includes Ir(ppy)3(tris(2-phenylpyridine)iridium(III)), Ir(ppy)2(acac)(bis(2-phenylpyridine)(acetylacetonate)iridium(III)), PIQIr(acac)(bis(1-phenylisoquinoline)acetylacetonateiridium), PQIr(acac)(bis(1-phenylquinoline)acetylacetonateiridium), PQIr(tris(1-phenylquinoline)iridium), Ir(piq)3(tris(1-phenylisoquinoline)iridium), Ir(piq)2(acac)(bis(1-phenylisoquinoline)(acetylacetonate)iridium), but is not limited to these.

[0105] Each of the third light emitting layer 223 and the fourth light emitting layer 224 includes the same second hole-type host and second electron-type host. However, the ratio of the second hole-type host and the second electron-type host may be different in each light emitting layer.

[0106] For example, the third light-emitting layer 223 is positioned closer to the first electrode 141, which supplies holes, than the fourth light-emitting layer 224, while the fourth light-emitting layer 224 is positioned closer to the second electrode 143, which supplies electrons, than the third light-emitting layer 223. The ratio of the second electron-type host can be higher in the third light-emitting layer 223 to ensure smooth electron supply, and the ratio of the second hole-type host can be higher in the fourth light-emitting layer 224 to ensure smooth hole supply. Therefore, the ratio of the second hole-type host to the second electron-type host can vary depending on the type of carrier that is relatively difficult to reach each light-emitting layer.

[0107] The third light-emitting layer 223 and the fourth light-emitting layer 224 are phosphorescent emission layers and are doped with a yellow-green phosphorescent dopant material. For example, the third light-emitting layer 223 and the fourth light-emitting layer 224 may be yellow-green light-emitting layers, and the wavelength of light emitted from the third light-emitting layer 223 and the fourth light-emitting layer 224 may be in the range of 510 nm to 590 nm.

[0108] The yellow-green phosphorescent dopant material is a material capable of emitting light having a wavelength in the yellow-green region. The EL spectrum of light emitted from the third light-emitting layer 223 and the fourth light-emitting layer 224 doped with the yellow-green dopant material has a peak in the yellow-green wavelength region, or has a first peak in the yellow-green wavelength region and a second peak in the red wavelength region that is lower than the first peak. Alternatively, the EL spectrum may have a first peak in the yellow-green wavelength region and an inflection point between the yellow-green wavelength region and the red wavelength region.

[0109] The host material of the third and fourth light emitting layers 223 and 224 may be formed by mixing one or more of CBP (4,4'-bis(carbazol-9-yl)biphenyl) and MCP (1,3-bis(carbazol-9-yl)benzene), but is not limited thereto.

[0110] The yellow-green dopant material of the third light-emitting layer 223 and the fourth light-emitting layer 224 can be formed of any one or more materials selected from the group including iridium (Ir) ligand complexes, including Ir(ppy)3(tris(2-phenylpyridine)iridium(III)) or Ir(ppy)2(acac)(bis(2-phenylpyridine)(acetylacetonate)iridium(III)) or Alq3(tris(8-hydroxyquinoline)aluminum), but is not limited thereto.

[0111] The wavelength of the second light-emitting portion 142-2, which includes the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224, can range from 510 nm to 650 nm. For example, the wavelength of the second light-emitting layer 222, which is a red light-emitting layer, ranges from 600 nm to 650 nm. Furthermore, when a yellow-green dopant material has a peak in the yellow-green wavelength region, the wavelengths of the third light-emitting layer 223 and the fourth light-emitting layer 224, which are yellow-green light-emitting layers, can range from 510 nm to 590 nm. Therefore, the wavelength of the second light-emitting portion 142-2 can range from a minimum of 510 nm to a maximum of 650 nm.

[0112] The second electron transport layer 232 is provided on the fourth light-emitting layer 224. Electrons are supplied from the second N-type charge generation layer 243 to the second electron transport layer 232. The second electron transport layer 232 transfers the supplied electrons to the second light-emitting layer 222, the third light-emitting layer 223, and the fourth light-emitting layer 224. The second electron transport layer 232 is substantially the same as the first electron transport layer 231 of the first light-emitting portion 142-1, and therefore, redundant description will be omitted.

[0113] The second N-type charge generation layer 243 is provided on the second electron transport layer 232. The second N-type charge generation layer 243 injects electrons into the second light-emitting portion 142-2. The second N-type charge generation layer 243 is provided between the second light-emitting portion 142-2 and the third light-emitting portion 142-3, which are adjacent to each other, to supply charges to the second light-emitting portion 142-2. The second N-type charge generation layer 243 is substantially the same as the first N-type charge generation layer 241 of the first light-emitting portion 142-1, and therefore, redundant description will be omitted.

[0114] The total thickness of the second light emitting portion 142 - 2 may be to In addition, the distance between the center of the second light emitting layer 222 and the first surface of the second electrode 143 may be to The distance between the boundary of the third light emitting layer 223 and the fourth light emitting layer 224, which is the center of the third light emitting layer 223 and the fourth light emitting layer 224, and the first surface of the second electrode 143 may be to

[0115] The third light-emitting portion 142-3 is disposed above the second light-emitting portion 142-2. The third light-emitting portion 142-3 includes a second P-type charge generation layer 244, a fourth hole transport layer 214, a fifth hole transport layer 215, a fifth light-emitting layer 225, a third electron transport layer 233, and an electron injection layer 251. Because the fifth light-emitting layer 225 is a fluorescent light-emitting layer, the third light-emitting portion 142-3 can function as a fluorescent light-emitting portion. As another example, the third light-emitting portion 142-3 may not include the second P-type charge generation layer 244.

[0116] The second P-type charge generation layer 244 is disposed on the second N-type charge generation layer 243. The second P-type charge generation layer 244 injects holes into the third light-emitting portion 142-3. The second P-type charge generation layer 244 is disposed between the second and third light-emitting portions 142-2, 142-3, which are adjacent to each other, to supply charges to the third light-emitting portion 142-3. The second P-type charge generation layer 244 is substantially the same as the first P-type charge generation layer 242 of the second light-emitting portion 142-2, and therefore, redundant description will be omitted.

[0117] The fourth hole transport layer 214 and the fifth hole transport layer 215 are sequentially disposed on the second P-type charge generation layer 244. The fourth hole transport layer 214 and the fifth hole transport layer 215 are organic layers that smoothly transfer holes from the second P-type charge generation layer 244 to the fifth light-emitting layer 225. The fourth hole transport layer 214 and the fifth hole transport layer 215 are substantially the same as the first hole transport layer 211 and the second hole transport layer 212 of the first light-emitting portion 142-1, and therefore, redundant description will be omitted.

[0118] The fifth light-emitting layer 225 is disposed between the fifth hole transport layer 215 and the third electron transport layer 233. The fifth light-emitting layer 225 is disposed in the third light-emitting portion 142-3, where excitons are formed, and includes a material that emits light of a specific color. For example, the fifth light-emitting layer 225 may include a material that emits blue light. The fifth light-emitting layer 225 is substantially the same as the first light-emitting layer 221 of the first light-emitting portion 142-1, and therefore, redundant description will be omitted.

[0119] The third electron transport layer 233 is provided on the fifth light emitting layer 225. Electrons are supplied from the second electrode 143 to the third electron transport layer 233. The third electron transport layer 233 transfers the supplied electrons to the fifth light emitting layer 225. The third electron transport layer 233 is substantially the same as the first electron transport layer 231 of the first light emitting portion 142-1, and therefore, redundant description will be omitted.

[0120] The electron injection layer 251 is provided on the third electron transport layer 233. The electron injection layer 251 is an organic layer that smoothly injects electrons from the second electrode 143 into the fifth light-emitting layer 225. The electron injection layer 251 may be formed of any one or more materials including LIF, Al, MoO3, LiQ (lithium quinolate), Alq3 (tris(8-hydroxyquinoline)aluminum), PBD, TAZ, spiro-PBD, BAlq, or SAlq, but is not limited thereto. The electron injection layer 251 may be omitted.

[0121] The total thickness of the third light emitting portion 142 - 3 may be to In addition, the distance between the center of the fifth light emitting layer 225 and the first surface of the second electrode 143 may be to

[0122] The organic light emitting diode 140 is an organic light emitting diode 140 having a three-stack structure in which a first light emitting portion 142-1, a second light emitting portion 142-2, and a third light emitting portion 142-3 are stacked. The light ultimately emitted from the light emitting portion 142 can be achieved by mixing the light emitted from the first light emitting portion 142-1, the second light emitting portion 142-2, and the third light emitting portion 142-3. Therefore, the design in the light emitting portion 142 can be varied according to the color of light to be achieved. For example, the first light emitting portion 142-1 and the third light emitting portion 142-3, which are fluorescent emission portions, emit blue light, while the second light emitting portion 142-2, which is a phosphorescent emission portion, emits red light and yellow-green light. Therefore, the organic light emitting diode 140 according to an exemplary embodiment of the present disclosure can be an organic light emitting diode 140 that emits white light.

[0123] Figure 4 is a schematic cross-sectional view of an organic light emitting display device according to an exemplary embodiment of the present disclosure. Figure 4 In order to facilitate the description, only the substrate 110 and the Figure 2 The organic light emitting diodes 140A, 140B, 140C and 140D on the substrate 110 of the organic light emitting display device 100 can be configured in the same manner as Figure 3 The organic light emitting diodes 140 shown are identical.

[0124] Reference Figure 4The organic light-emitting display device 100 according to an exemplary embodiment of the present disclosure includes a first organic light-emitting diode 140A corresponding to a first pixel PX1, a second organic light-emitting diode 140B corresponding to a second pixel PX2, a third organic light-emitting diode 140C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 140D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. The light emitted from the first organic light-emitting diode 140A is white light, and the white light emitted from the second organic light-emitting diode 140B may be converted into red light by the color filter 130. The white light emitted from the third organic light-emitting diode 140C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 140D may be converted into blue light by the color filter 130.

[0125] The first organic light-emitting diode 140A includes a first electrode 141A, a light-emitting portion 142A, and a second electrode 143A. The second organic light-emitting diode 140B includes a first electrode 141B, a light-emitting portion 142B, and a second electrode 143B. The third organic light-emitting diode 140C includes a first electrode 141C, a light-emitting portion 142C, and a second electrode 143C. The fourth organic light-emitting diode 140D includes a first electrode 141D, a light-emitting portion 142D, and a second electrode 143D. The light-emitting portions 142A, 142B, 142C, and 142D of the first, second, third, and fourth organic light-emitting diodes 140A, 140B, 140C, and 140D may have the same configuration. Furthermore, the second electrodes 143A, 143B, 143C, and 143D of the first, second, third, and fourth organic light-emitting diodes 140A, 140B, 140C, and 140D may have the same configuration. For example, only the thicknesses of the first electrodes 141A, 141B, 141C, and 141D of the first, second, third, and fourth organic light emitting diodes 140A, 140B, 140C, and 140D may be different.

[0126] The first pixel PX1, the second pixel PX2, the third pixel PX3, and the fourth pixel PX4 may have a microcavity structure corresponding to the light emitted from the corresponding pixel PX. According to the microcavity structure, light is repeatedly reflected between the first electrode 141 and the second electrode 143, which are separated by an optical length, so that light of a specific wavelength is amplified by constructive interference. Therefore, the second pixel PX2 may have a microcavity structure that can amplify light with a wavelength corresponding to red. The third pixel PX3 may have a microcavity structure that can amplify light with a wavelength corresponding to green. The fourth pixel PX4 may have a microcavity structure that can amplify light with a wavelength corresponding to blue.

[0127] The microcavity can be achieved by the thickness of the first electrode 141, which is a transparent conductive material, and the refractive index difference between the first electrode 141 and the first hole transport layer 211. For example, when the first electrode 141 is formed of indium zinc oxide, the first electrode 141 has a larger refractive index, so that the refractive index difference between the first electrode 141 and the first hole transport layer 211 can be increased. Therefore, more light can be reflected by the first electrode 141, so that the light can be amplified more efficiently. In addition, in order to achieve an optimized microcavity effect for each of the first pixel PX1, the second pixel PX2, the third pixel PX3, and the fourth pixel PX4, the thickness of the first electrode 141 of each pixel can be formed to be different.

[0128] To improve color viewing angle characteristics, the thickness of the first electrode 141A of the first organic light-emitting diode 140A can be configured to be different from the thickness of the first electrode 141B of the second organic light-emitting diode 140B. For example, the same microcavity structure may not be applied to the first pixel PX1 and the second pixel PX2, that is, different microcavity structures may be applied to the first pixel PX1 and the second pixel PX2. For example, when the thickness of the first electrode 141A and the thickness of the first electrode 141B are equal to each other, the color of the first pixel PX1 may change depending on the viewing angle. Therefore, the thickness of the first electrode 141A and the thickness of the first electrode 141B are set to be different from each other to minimize color changes depending on the viewing angle of the organic light-emitting display device 100.

[0129] Here, the color viewing angle refers to the degree of change in white color compared to the white color on the front surface according to the change in viewing angle when the screen of the display device is set to white with a color temperature of 10000K. When the degree of change in white color according to the change in viewing angle is small, the color viewing angle characteristic is good, and when the degree of change in white color according to the change in viewing angle is large, the color viewing angle characteristic is poor.

[0130] To improve brightness viewing angle characteristics, the thickness of the first electrode 141B of the second organic light-emitting diode 140B can be formed to be different from the thickness of the first electrode 141C of the third organic light-emitting diode 140C. For example, the same microcavity structure may not be applied to the second pixel PX2 and the third pixel PX3, that is, different microcavity structures may be applied to the second pixel PX2 and the third pixel PX3. For example, when the thickness of the first electrode 141B and the thickness of the first electrode 141C are equal to each other, the brightness of the second pixel PX2 may vary depending on the viewing angle. Therefore, the thickness of the first electrode 141B and the thickness of the first electrode 141C are set to be different from each other to minimize the brightness variation depending on the viewing angle of the organic light-emitting display device 100.

[0131] Here, the brightness viewing angle refers to the degree of brightness reduction according to the viewing angle. When the degree of brightness change according to the viewing angle is small, the brightness viewing angle characteristic is good, and when the degree of brightness change according to the viewing angle is large, the brightness viewing angle characteristic is bad.

[0132] In the following, reference will be made to Figure 5 and Figure 6 Describe the color change characteristics and brightness change characteristics according to the viewing angle.

[0133] Figure 5 is a graph showing the cavity enhancement factor according to the wavelength at each viewing angle. Figure 5 In FIG, the microcavity structure of the second pixel PX2 is applied to the first pixel PX1. For example, Figure 5 The thickness of the first electrode 141A of the first pixel PX1 is And the thickness of the first hole transport layer 211 is applied to And the measured graph. Figure 5 The graphs are measured at viewing angles of 0°, 15°, 30°, 45°, and 60°.

[0134] The cavity enhancement factor represents the ratio of the power of the exciton when it is in the organic light-emitting diode 140 to the power of the exciton when it is in air (assuming it is 1). The power of the exciton when it is in air refers to the power when no microcavity is applied. For example, the cavity enhancement factor can refer to the amplification rate of light by the microcavity.

[0135] Reference Figure 5It has been confirmed that the peak value of the cavity enhancement factor varies depending on the viewing angle. For example, because the distance of the microcavity varies depending on the viewing angle, the peak value to be amplified may vary. It has been confirmed that as the viewing angle increases, the peak values ​​at approximately 650nm, representing the red (R) region, and at approximately 470nm, representing the blue (B) region, decrease dramatically. For example, the peak value in the red (R) region may shift to the blue (B) region. However, it has been confirmed that the cavity enhancement factor at approximately 550nm, representing the green (G) region, remains constant even as the viewing angle increases. For example, the cavity enhancement factors in the red (R) and blue (B) regions decrease with increasing viewing angle, while the cavity enhancement factor in the green (G) region remains constant. Therefore, the degree of light amplification in the green (G) region increases, causing the white light emitted from the first pixel PX1 to appear green. In other words, the color of the white light emitted by the first pixel PX1 varies depending on the viewing angle, potentially degrading the color viewing angle characteristics. Consequently, when the thicknesses of the first electrode 141A of the first pixel PX1 and the first electrode 141B of the second pixel PX2 are configured to be different, the color viewing angle characteristics can be improved.

[0136] Figure 6 is a graph showing brightness according to viewing angles. Figure 6 Is with Figure 5 Measured under the same conditions. Figure 6 The normalized intensity can refer to brightness.

[0137] Reference Figure 6 , it is confirmed that as the viewing angle Angle increases, the brightness of the red R light decreases, but the brightness of the green G light remains at a constant level. For example, the larger the viewing angle, the relatively greater the brightness of the green G light, so that the brightness deviation between the red R light and the green G light may increase. Therefore, as the viewing angle increases, the white light may be green. In other words, the brightness of the white light changes according to the viewing angle, so that the brightness viewing angle characteristics may deteriorate. For example, the brightness deviation between the red R light and the green G light increases according to the viewing angle, so that the thickness of the first electrode 141B of the second pixel PX2 and the thickness of the first electrode 141C of the third pixel PX3 may be configured to be different.

[0138] In the following, reference will be made to Figures 7 to 8D Describe the thickness of the first electrode.

[0139] Figure 7 Color viewing angle characteristics according to the thicknesses of the first electrode and the first hole transport layer of the first pixel are shown. Figures 8A to 8D Luminance characteristics according to thicknesses of the first electrode and the first hole transport layer of the first pixel, the second pixel, the third pixel, and the fourth pixel are shown. Figures 7 to 8D The X-axis represents the thickness of the first electrode, and the Y-axis represents the thickness of the first hole transport layer. Figure 7 The larger the value of Δu'v', the worse the color viewing angle characteristics. Figures 8A to 8D cdm -2 The larger the value, the worse the brightness viewing angle characteristics.

[0140] Reference Figure 7 and Figure 8A , it is confirmed that when the thickness range of the first hole transport layer 211 of the first pixel PX1 is to When the first electrode 141A is to or to In addition, when the thickness range of the first hole transport layer 211 of the first pixel PX1 is to When the first electrode 141A can to or to It has excellent color viewing angle characteristics and brightness viewing angle characteristics within a thickness range.

[0141] Reference Figure 8B , when the thickness range of the first hole transport layer 211 of the second pixel PX2 is to When the thickness of the first electrode 141B can be to or to When the thickness of the first hole transport layer 211 of the second pixel PX2 is to When the thickness of the first electrode 141B can be to or to The second pixel PX2 may have excellent luminance characteristics within the above range.

[0142] Reference Figure 8C , when the thickness range of the first hole transport layer 211 of the third pixel PX3 is to When the thickness of the first electrode 141C can be to When the thickness of the first hole transport layer 211 of the third pixel PX3 is to When the thickness of the first electrode 141C can be to or to The third pixel PX3 may have excellent brightness characteristics within the above range.

[0143] Reference Figure 8D , when the thickness range of the first hole transport layer 211 of the fourth pixel PX4 is to When the thickness of the first electrode 141D can be to or to or to When the thickness of the first hole transport layer 211 of the fourth pixel PX4 is to When the thickness of the first electrode 141D can be to or to The fourth pixel PX4 may have excellent brightness characteristics within the above range.

[0144] The thickness of the first electrode 141A of the first pixel PX1, the first electrode 141B of the second pixel PX2, the first electrode 141C of the third pixel PX3, and the first electrode 141D of the fourth pixel PX4 may be set within the above range. The thickness of the first electrode 141A of the first organic light emitting diode 140A may be set to be different from the thickness of the first electrode 141B of the second organic light emitting diode 140B. The thickness of the first electrode 141B of the second organic light emitting diode 140B may be set to be different from the thickness of the first electrode 141C of the third organic light emitting diode 140C.

[0145] Refer again Figure 4 , the thickness of the first electrode 141A of the first pixel PX1 can be equal to the thickness of the first electrode 141C of the third pixel PX3. The thickness of the first electrode 141B of the second pixel PX2 can be equal to the thickness of the first electrode 141D of the fourth pixel PX4. For example, the first electrodes 141A, 141B, 141C, and 141D of the organic light-emitting display device 100 can be formed by performing two photoprocesses. Therefore, the photoprocess for forming the first electrodes 141A, 141B, 141C, and 141D is minimized, and color changes and brightness changes depending on the viewing angle are also minimized.

[0146] At the same time, despite Figure 4, the thickness of the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 is shown to be greater than the thickness of the first electrode 141B of the second pixel PX2 and the first electrode 141D of the fourth pixel PX4, but the present disclosure is not limited thereto. For example, the thickness of the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 may be less than the thickness of the first electrode 141B of the second pixel PX2 and the first electrode 141D of the fourth pixel PX4.

[0147] In organic light-emitting display devices, the anodes of white pixels, red pixels, green pixels, and blue pixels that emit light of different colors are formed to have the same thickness. For example, the same microcavity structure is applied to each pixel. In this case, the color of the light emitted from the white pixel changes depending on the viewing angle, resulting in a problem of deterioration of the color viewing angle characteristics. In addition, the brightness of the light emitted from the red pixel, green pixel, or blue pixel changes depending on the viewing angle, resulting in a problem of deterioration of the brightness viewing angle characteristics.

[0148] The organic light-emitting display device 100 according to an exemplary embodiment of the present disclosure adjusts the thickness of the first electrode 141 of each of the first pixel PX1, the second pixel PX2, the third pixel PX3, and the fourth pixel PX4 that emit light of different colors. Thus, color viewing angle characteristics and brightness viewing angle characteristics can be improved. For example, the thickness of the first electrode 141A of the first pixel PX1, which is a white pixel, and the thickness of the first electrode 141B of the second pixel PX2, which is a red pixel, are configured to be different, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 141B of the second pixel PX2, which is a red pixel, and the thickness of the first electrode 141C of the third pixel PX3, which is a green pixel, are configured to be different, thereby improving brightness viewing angle characteristics.

[0149] Furthermore, the thicknesses of the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 can be configured to be equal to each other, and the thicknesses of the first electrode 141B of the second pixel PX2 and the first electrode 141D of the fourth pixel PX4 can be configured to be equal to each other. Thus, the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 can be formed simultaneously, and the first electrode 141B of the second pixel PX2 and the first electrode 141D of the fourth pixel PX4 can be formed simultaneously. For example, the first electrode 141 of the organic light-emitting display device 100 can be formed by performing two photoprocesses. Thus, the number of photoprocesses can be minimized, and a microcavity structure optimized for each of the pixels PX1, PX2, PX3, and PX4 can also be applied.

[0150] Figure 9is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 941A of the first pixel PX1, the first electrode 941B of the second pixel PX2, the first electrode 941C of the third pixel PX3, and the first electrode 941D of the fourth pixel PX4, Figure 9 The organic light emitting display device 900 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0151] Reference Figure 9 The organic light-emitting display device 900 includes a first organic light-emitting diode 940A corresponding to a first pixel PX1, a second organic light-emitting diode 940B corresponding to a second pixel PX2, a third organic light-emitting diode 940C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 940D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 940A is white light, the white light emitted from the second organic light-emitting diode 940B may be converted into red light by the color filter 130, the white light emitted from the third organic light-emitting diode 940C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 940D may be converted into blue light by the color filter 130.

[0152] The thickness of the first electrode 941A of the first pixel PX1 may be different from the thickness of the first electrode 941B of the second pixel PX2. The thickness of the first electrode 941A of the first pixel PX1, the thickness of the first electrode 941C of the third pixel PX3, and the thickness of the first electrode 941D of the fourth pixel PX4 may be equal to each other. For example, the thickness of the first electrode 941A of the first pixel PX1 and the thickness of the first electrode 941B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 900. In addition, the thickness of the first electrode 941B of the second pixel PX2 and the thickness of the first electrode 941C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 900.

[0153] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 941A is to or to In addition, the thickness of the first electrode 941B is to or to The thickness of the first electrode 941C is to And the thickness of the first electrode 941D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 941A is to or to In addition, the thickness of the first electrode 941B is to or to The thickness of the first electrode 941C is to or to And the thickness of the first electrode 941D is to or to

[0154] Despite Figure 9 , the thickness of the first electrode 941A of the first pixel PX1, the thickness of the first electrode 941C of the third pixel PX3, and the thickness of the first electrode 941D of the fourth pixel PX4 are shown to be greater than the thickness of the first electrode 941B of the second pixel PX2, but the present disclosure is not limited thereto. For example, the thickness of the first electrode 941A of the first pixel PX1, the thickness of the first electrode 941C of the third pixel PX3, and the thickness of the first electrode 941D of the fourth pixel PX4 may be less than the thickness of the first electrode 941B of the second pixel PX2.

[0155] According to another exemplary embodiment of the present disclosure, an organic light-emitting display device 900 configures a first electrode 941A of a first pixel PX1 to have a thickness different from that of a first electrode 941B of a second pixel PX2, thereby improving color viewing angle characteristics. Furthermore, a first electrode 941B of a second pixel PX2 and a first electrode 941C of a third pixel PX3 are configured to have different thicknesses, thereby improving brightness viewing angle characteristics.

[0156] Furthermore, the thickness of the first electrode 941A of the first pixel PX1, the thickness of the first electrode 941C of the third pixel PX3, and the thickness of the first electrode 941D of the fourth pixel PX4 can be configured to be equal to each other. For example, the first electrodes 941A, 941B, 941C, and 941D of the organic light-emitting display device 900 can be formed by performing two photoprocesses. Therefore, the photoprocess can be minimized, and a microcavity structure optimized for each pixel PX1, PX2, PX3, and PX4 can also be applied.

[0157] Figure 10 1 is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 1041A of the first pixel PX1, the first electrode 1041B of the second pixel PX2, the first electrode 1041C of the third pixel PX3, and the first electrode 1041D of the fourth pixel PX4, Figure 10 The organic light emitting display device 1000 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0158] Reference Figure 10 The organic light-emitting display device 1000 includes a first organic light-emitting diode 1040A corresponding to a first pixel PX1, a second organic light-emitting diode 1040B corresponding to a second pixel PX2, a third organic light-emitting diode 1040C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 1040D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 1040A is white light, the white light emitted from the second organic light-emitting diode 1040B may be converted into red light by the color filter 130, the white light emitted from the third organic light-emitting diode 1040C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 1040D may be converted into blue light by the color filter 130.

[0159] The thickness of the first electrode 1041A of the first pixel PX1, the thickness of the first electrode 1041B of the second pixel PX2, and the thickness of the first electrode 1041C of the third pixel PX3 may be different from each other. The thickness of the first electrode 1041B of the second pixel PX2 may be equal to the thickness of the first electrode 1041D of the fourth pixel PX4. For example, the thickness of the first electrode 1041A of the first pixel PX1 and the thickness of the first electrode 1041B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 1000. In addition, the thickness of the first electrode 1041B of the second pixel PX2 and the thickness of the first electrode 1041C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 1000.

[0160] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1041A is to or to In addition, the thickness of the first electrode 1041B is to or to The thickness of the first electrode 1041C is to And the thickness of the first electrode 1041D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1041A is to or to In addition, the thickness of the first electrode 1041B is to or to The thickness of the first electrode 1041C is to or to And the thickness of the first electrode 1041D is to or to

[0161] At the same time, despite Figure 10, it is shown that the thickness of the first electrode 1041A of the first pixel PX1, the thickness of the first electrode 1041C of the third pixel PX3, and the thicknesses of the first electrodes 1041B and 1041D of the second and fourth pixels PX2 and PX4 decrease in this order, but the present disclosure is not limited thereto.

[0162] According to another exemplary embodiment of the present disclosure, the organic light-emitting display device 1000 configures the thickness of the first electrode 1041A of the first pixel PX1 to be different from the thickness of the first electrode 1041B of the second pixel PX2, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 1041B of the second pixel PX2 and the thickness of the first electrode 1041C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0163] Furthermore, the thicknesses of the first electrode 1041A of the first pixel PX1 and the first electrode 1041C of the third pixel PX3 can be configured to be different from each other, and the thicknesses of the first electrode 1041B of the second pixel PX2 and the first electrode 1041D of the fourth pixel PX4 can be configured to be equal to each other. For example, the first electrodes 1041A, 1041B, 1041C, and 1041D of the organic light-emitting display device 1000 can be formed by performing three photoprocesses to have three different thicknesses for each of the pixels PX1, PX2, PX3, and PX4. Thus, the photoprocesses can be minimized, and various thicknesses can be applied to each of the pixels PX1, PX2, PX3, and PX4, thereby achieving a more optimized microcavity structure.

[0164] Figure 11 1 is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 1141A of the first pixel PX1, the first electrode 1141B of the second pixel PX2, the first electrode 1141C of the third pixel PX3, and the first electrode 1141D of the fourth pixel PX4, Figure 11 The organic light emitting display device 1100 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0165] Reference Figure 11, the organic light-emitting display device 1100 includes a first organic light-emitting diode 1140A corresponding to a first pixel PX1, a second organic light-emitting diode 1140B corresponding to a second pixel PX2, a third organic light-emitting diode 1140C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 1140D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 1140A is white light, the white light emitted from the second organic light-emitting diode 1140B may be converted into red light by the color filter 130. The white light emitted from the third organic light-emitting diode 1140C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 1140D may be converted into blue light by the color filter 130.

[0166] The thickness of the first electrode 1141A of the first pixel PX1, the thickness of the first electrode 1141B of the second pixel PX2, and the thickness of the first electrode 1141C of the third pixel PX3 may be different from each other. The thickness of the first electrode 1141C of the third pixel PX3 may be equal to the thickness of the first electrode 1141D of the fourth pixel PX4. For example, the thickness of the first electrode 1141A of the first pixel PX1 and the thickness of the first electrode 1141B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 1100. In addition, the thickness of the first electrode 1141B of the second pixel PX2 and the thickness of the first electrode 1141C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 1100.

[0167] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1141A is to or to In addition, the thickness of the first electrode 1141B is to or to The thickness of the first electrode 1141C is to And the thickness of the first electrode 1141D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1141A is to or to In addition, the thickness of the first electrode 1141B is to or to The thickness of the first electrode 1141C is to or to And the thickness of the first electrode 1141D is to or to

[0168] At the same time, despite Figure 11 , it is shown that the thickness of the first electrode 1141A of the first pixel PX1, the thickness of the first electrodes 1141C and 1141D of the third and fourth pixels PX3 and PX4, and the thickness of the first electrode 1141B of the second pixel PX2 decrease in this order, but the present disclosure is not limited thereto.

[0169] According to another exemplary embodiment of the present disclosure, an organic light-emitting display device 1100 is configured such that the thickness of the first electrode 1141A of the first pixel PX1 is different from the thickness of the first electrode 1141B of the second pixel PX2, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 1141B of the second pixel PX2 is different from the thickness of the first electrode 1141C of the third pixel PX3, thereby improving brightness viewing angle characteristics.

[0170] Furthermore, the thicknesses of the first electrode 1141A of the first pixel PX1 and the first electrode 1141C of the third pixel PX3 can be configured to be different from each other, and the thicknesses of the first electrode 1141C of the third pixel PX3 and the first electrode 1141D of the fourth pixel PX4 can be configured to be equal to each other. For example, the first electrodes 1141A, 1141B, 1141C, and 1141D of the organic light-emitting display device 1100 can be formed by performing three photoprocesses to have three different thicknesses for each of the pixels PX1, PX2, PX3, and PX4. Thus, the photoprocesses can be minimized, and various thicknesses can be applied to each of the pixels PX1, PX2, PX3, and PX4, thereby achieving a more optimized microcavity structure.

[0171] Figure 121 is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 1241A of the first pixel PX1, the first electrode 1241B of the second pixel PX2, the first electrode 1241C of the third pixel PX3, and the first electrode 1241D of the fourth pixel PX4, Figure 12 The organic light emitting display device 1200 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0172] Reference Figure 12 The organic light-emitting display device 1200 includes a first organic light-emitting diode 1240A corresponding to a first pixel PX1, a second organic light-emitting diode 1240B corresponding to a second pixel PX2, a third organic light-emitting diode 1240C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 1240D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 1240A is white light, the white light emitted from the second organic light-emitting diode 1240B may be converted into red light by the color filter 130, the white light emitted from the third organic light-emitting diode 1240C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 1240D may be converted into blue light by the color filter 130.

[0173] The thickness of the first electrode 1241A of the first pixel PX1, the thickness of the first electrode 1241B of the second pixel PX2, and the thickness of the first electrode 1241C of the third pixel PX3 may be different from each other. The thickness of the first electrode 1241A of the first pixel PX1 may be equal to the thickness of the first electrode 1241D of the fourth pixel PX4. For example, the thickness of the first electrode 1241A of the first pixel PX1 and the thickness of the first electrode 1241B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 1200. In addition, the thickness of the first electrode 1241B of the second pixel PX2 and the thickness of the first electrode 1241C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 1200.

[0174] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1241A is to or to In addition, the thickness of the first electrode 1241B is to or to The thickness of the first electrode 1241C is to And the thickness of the first electrode 1241D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1241A is to or to In addition, the thickness of the first electrode 1241B is to or to The thickness of the first electrode 1241C is to or to And the thickness of the first electrode 1241D is to or to

[0175] At the same time, despite Figure 12 , it is shown that the thicknesses of the first electrodes 1241A and 1241D of the first and fourth pixels PX1 and PX4, the thickness of the first electrode 1241C of the third pixel PX3, and the thickness of the first electrode 1241B of the second pixel PX2 decrease in this order, but the present disclosure is not limited thereto.

[0176] According to another exemplary embodiment of the present disclosure, an organic light-emitting display device 1200 is configured such that the thickness of the first electrode 1241A of the first pixel PX1 is different from the thickness of the first electrode 1241B of the second pixel PX2, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 1241B of the second pixel PX2 and the thickness of the first electrode 1241C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0177] Furthermore, the thicknesses of the first electrode 1241A of the first pixel PX1 and the first electrode 1241C of the third pixel PX3 can be configured to be different from each other, and the thicknesses of the first electrode 1241A of the first pixel PX1 and the first electrode 1241D of the fourth pixel PX4 can be configured to be equal to each other. For example, the first electrodes 1241A, 1241B, 1241C, and 1241D of the organic light-emitting display device 1200 can be formed by performing three photoprocesses to have three different thicknesses for each of the pixels PX1, PX2, PX3, and PX4. Thus, the photoprocesses can be minimized, and various thicknesses can be applied to each of the pixels PX1, PX2, PX3, and PX4, thereby achieving a more optimized microcavity structure.

[0178] Figure 13 1 is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 1341A of the first pixel PX1, the first electrode 1341B of the second pixel PX2, the first electrode 1341C of the third pixel PX3, and the first electrode 1341D of the fourth pixel PX4, Figure 13 The organic light emitting display device 1300 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0179] Reference Figure 13 The organic light-emitting display device 1300 includes a first organic light-emitting diode 1340A corresponding to a first pixel PX1, a second organic light-emitting diode 1340B corresponding to a second pixel PX2, a third organic light-emitting diode 1340C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 1340D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 1340A is white light, the white light emitted from the second organic light-emitting diode 1340B may be converted into red light by the color filter 130, the white light emitted from the third organic light-emitting diode 1340C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 1340D may be converted into blue light by the color filter 130.

[0180] The thickness of the first electrode 1341A of the first pixel PX1, the thickness of the first electrode 1341B of the second pixel PX2, and the thickness of the first electrode 1341D of the fourth pixel PX4 may be different from each other. The thickness of the first electrode 1341A of the first pixel PX1 may be equal to the thickness of the first electrode 1341C of the third pixel PX3. For example, the thickness of the first electrode 1341A of the first pixel PX1 and the thickness of the first electrode 1341B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 1300. In addition, the thickness of the first electrode 1341B of the second pixel PX2 and the thickness of the first electrode 1341C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 1300.

[0181] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1341A is to or to In addition, the thickness of the first electrode 1341B is to or to The thickness of the first electrode 1341C is to And the thickness of the first electrode 1341D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1341A is to or to In addition, the thickness of the first electrode 1341B is to or to The thickness of the first electrode 1341C is to or to And the thickness of the first electrode 1341D is to or to

[0182] At the same time, despite Figure 13, it is shown that the thicknesses of the first electrodes 1341A and 1341C of the first and third pixels PX1 and PX3, the thickness of the first electrode 1341D of the fourth pixel PX4, and the thickness of the first electrode 1341B of the second pixel PX2 decrease in this order, but the present disclosure is not limited thereto.

[0183] According to another exemplary embodiment of the present disclosure, an organic light-emitting display device 1300 is configured such that the thickness of the first electrode 1341A of the first pixel PX1 is different from the thickness of the first electrode 1341B of the second pixel PX2, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 1341B of the second pixel PX2 and the thickness of the first electrode 1341C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0184] Furthermore, the thicknesses of the first electrode 1341A of the first pixel PX1 and the first electrode 1341C of the third pixel PX3 can be configured to be equal to each other. Furthermore, the thicknesses of the first electrode 1341A of the first pixel PX1, the thicknesses of the first electrode 1341B of the second pixel PX2, and the thicknesses of the first electrode 1341D of the fourth pixel PX4 can be configured to be different from each other. For example, the first electrodes 1341A, 1341B, 1341C, and 1341D of the organic light-emitting display device 1300 can be formed by performing three photoprocesses to have three different thicknesses for each of the pixels PX1, PX2, PX3, and PX4. Thus, the photoprocesses can be minimized, and various thicknesses can be applied to each of the pixels PX1, PX2, PX3, and PX4, thereby achieving a more optimized microcavity structure.

[0185] Figure 14 1 is a schematic cross-sectional view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. In addition to the thickness relationship of the first electrode 1441A of the first pixel PX1, the first electrode 1441B of the second pixel PX2, the first electrode 1441C of the third pixel PX3, and the first electrode 1441D of the fourth pixel PX4, Figure 14 The organic light emitting display device 1400 and Figure 4 The organic light emitting display device 100 is substantially the same as that of FIG. 1 , and thus redundant description will be omitted.

[0186] Reference Figure 14, the organic light-emitting display device 1400 includes a first organic light-emitting diode 1440A corresponding to a first pixel PX1, a second organic light-emitting diode 1440B corresponding to a second pixel PX2, a third organic light-emitting diode 1440C corresponding to a third pixel PX3, and a fourth organic light-emitting diode 1440D corresponding to a fourth pixel PX4. For example, the first pixel PX1 may be a white pixel, the second pixel PX2 may be a red pixel, the third pixel PX3 may be a green pixel, and the fourth pixel PX4 may be a blue pixel. For example, the light emitted from the first organic light-emitting diode 1440A is white light, the white light emitted from the second organic light-emitting diode 1440B may be converted into red light by the color filter 130, the white light emitted from the third organic light-emitting diode 1440C may be converted into green light by the color filter 130, and the white light emitted from the fourth organic light-emitting diode 1440D may be converted into blue light by the color filter 130.

[0187] The thickness of the first electrode 1441A of the first pixel PX1, the thickness of the first electrode 1441B of the second pixel PX2, the thickness of the first electrode 1441C of the third pixel PX3, and the thickness of the first electrode 1441D of the fourth pixel PX4 may be different from each other. For example, the thickness of the first electrode 1441A of the first pixel PX1 and the thickness of the first electrode 1441B of the second pixel PX2 are configured to be different, thereby improving the color viewing angle characteristics of the organic light-emitting display device 1400. In addition, the thickness of the first electrode 1441B of the second pixel PX2 and the thickness of the first electrode 1441C of the third pixel PX3 are configured to be different, thereby improving the brightness viewing angle characteristics of the organic light-emitting display device 1400.

[0188] Here, when the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1441A is to or to In addition, the thickness of the first electrode 1441B is to or to The thickness of the first electrode 1441C is to And the thickness of the first electrode 1441D is to or to or to When the thickness of the first hole transport layer 211 is to When the thickness of the first electrode 1441A is to or to In addition, the thickness of the first electrode 1441B is to or to The thickness of the first electrode 1441C is to or to And the thickness of the first electrode 1441D is to or to

[0189] At the same time, despite Figure 14 , it is shown that the thickness of the first electrode 1441A of the first pixel PX1, the thickness of the first electrode 1441C of the third pixel PX3, the thickness of the first electrode 1441B of the second pixel PX2, and the thickness of the first electrode 1441D of the fourth pixel PX4 decrease in this order, but the present disclosure is not limited thereto.

[0190] In an organic light-emitting display device 1400 according to another exemplary embodiment of the present disclosure, the thickness of the first electrode 1441A of the first pixel PX1 is configured to be different from the thickness of the first electrode 1441B of the second pixel PX2, thereby improving color viewing angle characteristics. In addition, the thickness of the first electrode 1441B of the second pixel PX2 and the thickness of the first electrode 1441C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0191] Furthermore, the thicknesses of the first electrodes 1441A, 1441B, 1441C, and 1441D of the first, second, third, and fourth pixels PX1, PX2, PX3, and PX4 can be configured to be different from one another. For example, the thicknesses of the first electrodes 1441A, 1441B, 1441C, and 1441D can be set to be more optimized for each of the first, second, third, and fourth pixels PX3, PX4 of the organic light-emitting display device 1400. Consequently, the microcavity effect of the organic light-emitting display device 1400 can be improved.

[0192] Exemplary embodiments of the present disclosure may also be described as follows:

[0193] An organic light-emitting display device according to an embodiment of the present disclosure includes a substrate including a plurality of pixels. The organic light-emitting display device also includes a plurality of organic light-emitting diodes arranged on the substrate to correspond to the plurality of pixels. The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel that emit light of different colors. Each of the plurality of organic light-emitting diodes includes a first electrode, a light-emitting portion on the first electrode, and a second electrode on the light-emitting portion. The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel.

[0194] According to some embodiments of the present disclosure, the first pixel may be a white pixel, the second pixel may be a red pixel, the third pixel may be a green pixel, and the fourth pixel may be a blue pixel.

[0195] According to some embodiments of the present disclosure, the thickness of the first electrode of the first pixel may be equal to the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the second pixel may be equal to the thickness of the first electrode of the fourth pixel.

[0196] According to some embodiments of the present disclosure, a thickness of the first electrode of the first pixel, a thickness of the first electrode of the third pixel, and a thickness of the first electrode of the fourth pixel may be equal to each other.

[0197] According to some embodiments of the present disclosure, the thickness of the first electrode of the first pixel may be different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the second pixel may be equal to the thickness of the first electrode of the fourth pixel.

[0198] According to some embodiments of the present disclosure, the thickness of the first electrode of the first pixel may be different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the third pixel may be equal to the thickness of the first electrode of the fourth pixel.

[0199] According to some embodiments of the present disclosure, the thickness of the first electrode of the first pixel may be different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the first pixel may be equal to the thickness of the first electrode of the fourth pixel.

[0200] According to some embodiments of the present disclosure, the thickness of the first electrode of the first pixel may be equal to the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the first pixel, the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the fourth pixel may be different from each other.

[0201] According to some embodiments of the present disclosure, thicknesses of the first electrodes of the first pixel, the second pixel, the third pixel, and the fourth pixel may be different from each other.

[0202] According to some embodiments of the present disclosure, the light emitting portion may include a hole transport layer disposed on the first electrode, and the thickness of the hole transport layer may be to

[0203] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to When the thickness of the first electrode of the first pixel can be to or to The thickness of the first electrode of the second pixel may be to or to The thickness of the first electrode of the third pixel may be to And the thickness of the first electrode of the fourth pixel may be to or to or to

[0204] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to When the thickness of the first electrode of the first pixel can be to or to The thickness of the first electrode of the second pixel may be to or to The thickness of the first electrode of the third pixel may be to or to And the thickness of the first electrode of the fourth pixel may be to or to

[0205] According to some embodiments of the present disclosure, the light-emitting portion may include: a first light-emitting portion on a first electrode and including a blue light-emitting layer; a second light-emitting portion on the first light-emitting portion and including a red light-emitting layer and two yellow-green light-emitting layers; and a third light-emitting portion on the second light-emitting portion and including a blue light-emitting layer.

[0206] According to some embodiments of the present disclosure, the thickness of the first light emitting portion may be to The thickness of the second light emitting portion may be to The thickness of the third light emitting portion may be to The distance between the center of the blue light-emitting layer of the first light-emitting portion and the second electrode may be to The distance between the center of the red light-emitting layer of the second light-emitting portion and the second electrode may be to The distance between the boundary of the two yellow-green light-emitting layers of the second light-emitting portion and the second electrode can be to The distance between the center of the blue light-emitting layer of the third light-emitting portion and the second electrode may be to

[0207] According to some embodiments of the present disclosure, the first electrode may include a transparent conductive material, and the second electrode may include a metal material.

[0208] An organic light-emitting display device according to another embodiment of the present disclosure includes a substrate including a plurality of pixels. The organic light-emitting display device also includes a plurality of organic light-emitting diodes arranged on the substrate to correspond to the plurality of pixels. The plurality of pixels include white pixels, red pixels, green pixels, and blue pixels. Each of the plurality of organic light-emitting diodes includes a first electrode, a first light-emitting portion on the first electrode and including a blue light-emitting layer, a second light-emitting portion on the first light-emitting portion and including a red light-emitting layer and two yellow-green light-emitting layers, a third light-emitting portion on the second light-emitting portion and including a blue light-emitting layer, and a second electrode on the third light-emitting portion. The thickness of the first electrode of the white pixel is different from the thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from the thickness of the first electrode of the green pixel.

[0209] According to some embodiments of the present disclosure, the first light emitting portion may include a hole transport layer on the first electrode, and the thickness of the hole transport layer is to

[0210] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to When the thickness of the first electrode of the white pixel can be to or to The thickness of the first electrode of the red pixel can be to or to The thickness of the first electrode of the green pixel can be to And the thickness of the first electrode of the blue pixel can be to or to or to

[0211] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to When the thickness of the first electrode of the white pixel can be to or to The thickness of the first electrode of the red pixel can be to or to The thickness of the first electrode of the green pixel can be to or to And the thickness of the first electrode of the blue pixel can be to or to

[0212] According to another embodiment of the present disclosure, an organic light-emitting display device is provided. The organic light-emitting display device may include: a substrate including a plurality of pixels; and a plurality of organic light-emitting diodes, the plurality of organic light-emitting diodes being arranged on the substrate to correspond to the plurality of pixels, respectively, wherein the plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors, each of the plurality of pixels having a microcavity structure corresponding to the light emitted from the pixel, wherein each of the plurality of organic light-emitting diodes includes: a first electrode; a light-emitting portion on the first electrode; and a second electrode on the light-emitting portion, wherein the microcavity structure of the first pixel is different from the microcavity structure of the second pixel, and the microcavity structure of the second pixel is different from the microcavity structure of the third pixel.

[0213] According to the above description, the present technology can also be implemented as follows.

[0214] Note 1. An organic light-emitting display device comprising:

[0215] a substrate comprising a plurality of pixels; and

[0216] a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively;

[0217] The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors.

[0218] Wherein, each of the plurality of organic light emitting diodes comprises:

[0219] a first electrode;

[0220] A light emitting portion on the first electrode; and

[0221] The second electrode on the light emitting portion,

[0222] The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel.

[0223] Supplementary note 2. The organic light-emitting display device according to Supplementary note 1, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel.

[0224] Note 3. An organic light-emitting display device according to Note 2, wherein the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the second pixel is equal to the thickness of the first electrode of the fourth pixel.

[0225] Supplementary note 4. The organic light-emitting display device according to Supplementary note 2, wherein the thickness of the first electrode of the first pixel, the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the fourth pixel are equal to each other.

[0226] Note 5. An organic light-emitting display device according to Note 2, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the second pixel is equal to the thickness of the first electrode of the fourth pixel.

[0227] Note 6. An organic light-emitting display device according to Note 2, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the third pixel is equal to the thickness of the first electrode of the fourth pixel.

[0228] Note 7. An organic light-emitting display device according to Note 2, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the fourth pixel.

[0229] Note 8. An organic light-emitting display device according to Note 2, wherein the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the first pixel, the thickness of the first electrode of the second pixel and the thickness of the first electrode of the fourth pixel are different from each other.

[0230] Supplementary note 9. The organic light-emitting display device according to Supplementary note 2, wherein thicknesses of the first electrodes of the first pixel, the second pixel, the third pixel, and the fourth pixel are different from each other.

[0231] Note 10. The organic light-emitting display device according to Note 2, wherein the light-emitting portion includes a hole transport layer provided on the first electrode, and the thickness of the hole transport layer is to

[0232] Note 11. The organic light-emitting display device according to Note 10, wherein when the thickness of the hole transport layer is to When the thickness of the first electrode of the first pixel is to or to The thickness of the first electrode of the second pixel is to or to The thickness of the first electrode of the third pixel is to And the thickness of the first electrode of the fourth pixel is to or to or to

[0233] Note 12. The organic light emitting display device according to Note 10, wherein when the thickness of the hole transport layer is to When the thickness of the first electrode of the first pixel is to or to The thickness of the first electrode of the second pixel is to or to The thickness of the first electrode of the third pixel is to or to And the thickness of the first electrode of the fourth pixel is to or to

[0234] Supplementary note 13. The organic light-emitting display device according to Supplementary note 2, wherein the light-emitting portion comprises:

[0235] a first light-emitting portion, which is on the first electrode and includes a blue light-emitting layer;

[0236] a second light-emitting portion on the first light-emitting portion and including a red light-emitting layer and two yellow-green light-emitting layers; and

[0237] The third light-emitting portion is on the second light-emitting portion and includes a blue light-emitting layer.

[0238] Note 14. The organic light-emitting display device according to Note 13, wherein the thickness of the first light-emitting portion is to The thickness of the second light emitting portion is to The thickness of the third light emitting portion is to The distance between the center of the blue light-emitting layer of the first light-emitting portion and the second electrode is to The distance between the center of the red light-emitting layer of the second light-emitting portion and the second electrode is to The distance between the boundary of the two yellow-green light-emitting layers of the second light-emitting portion and the second electrode is to And the distance between the center of the blue light-emitting layer of the third light-emitting portion and the second electrode is to

[0239] Supplementary note 15. The organic light-emitting display device according to Supplementary note 1, wherein the first electrode comprises a transparent conductive material, and the second electrode comprises a metal material.

[0240] Note 16. An organic light-emitting display device comprising:

[0241] a substrate comprising a plurality of pixels; and

[0242] a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being on the substrate so as to correspond to the plurality of pixels respectively;

[0243] The plurality of pixels include white pixels, red pixels, green pixels and blue pixels.

[0244] Each of the plurality of organic light emitting diodes comprises:

[0245] a first electrode;

[0246] a first light-emitting portion, which is on the first electrode and includes a blue light-emitting layer;

[0247] a second light-emitting portion, which is on the first light-emitting portion and includes a red light-emitting layer and two yellow-green light-emitting layers;

[0248] a third light-emitting portion, which is on the second light-emitting portion and includes a blue light-emitting layer; and

[0249] a second electrode on the third light-emitting portion,

[0250] The thickness of the first electrode of the white pixel is different from the thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from the thickness of the first electrode of the green pixel.

[0251] Note 17. The organic light-emitting display device according to Note 16, wherein the first light-emitting portion includes a hole transport layer on the first electrode, and the thickness of the hole transport layer is to

[0252] Note 18. The organic light-emitting display device according to Note 17, wherein when the thickness of the hole transport layer is to When the thickness of the first electrode of the white pixel is to or to The thickness of the first electrode of the red pixel is to or to The thickness of the first electrode of the green pixel is to And the thickness of the first electrode of the blue pixel is to or to or to

[0253] Note 19. The organic light-emitting display device according to Note 17, wherein when the thickness of the hole transport layer is to When the thickness of the first electrode of the white pixel is to or to The thickness of the first electrode of the red pixel is to or to The thickness of the first electrode of the green pixel is to or to And the thickness of the first electrode of the blue pixel is to or to

[0254] Note 20. An organic light-emitting display device comprising:

[0255] a substrate comprising a plurality of pixels; and

[0256] a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively;

[0257] The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors, and each of the plurality of pixels has a microcavity structure corresponding to the light emitted from the pixel,

[0258] Wherein, each of the plurality of organic light emitting diodes comprises:

[0259] a first electrode;

[0260] A light emitting portion on the first electrode; and

[0261] The second electrode on the light emitting portion,

[0262] The microcavity structure of the first pixel is different from the microcavity structure of the second pixel, and the microcavity structure of the second pixel is different from the microcavity structure of the third pixel.

[0263] It will be apparent to those skilled in the art that various modifications and variations may be made to the present disclosure without departing from the technical concept or scope of the present disclosure. Therefore, it is intended that the embodiments of the present disclosure encompass such modifications and variations as long as they fall within the scope of the appended claims and their equivalents.

Claims

1. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, wherein the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the second pixel is equal to a thickness of the first electrode of the fourth pixel.

2. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, The thickness of the first electrode of the first pixel, the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the fourth pixel are equal to each other.

3. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the second pixel is equal to a thickness of the first electrode of the fourth pixel.

4. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the third pixel is equal to a thickness of the first electrode of the fourth pixel.

5. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, The thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the first pixel is equal to a thickness of the first electrode of the fourth pixel.

6. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors. Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the thickness of the first electrode of the first pixel is different from the thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from the thickness of the first electrode of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, wherein the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the first pixel, a thickness of the first electrode of the second pixel, and a thickness of the first electrode of the fourth pixel are different from each other.

7. The organic light emitting display device according to any one of claims 1 to 6, wherein: The thickness of the hole transport layer is to 8. The organic light emitting display device according to claim 7, wherein: When the thickness of the hole transport layer is to When the thickness of the first electrode of the first pixel is to or to The thickness of the first electrode of the second pixel is to or to The thickness of the first electrode of the third pixel is to And the thickness of the first electrode of the fourth pixel is to or to or to 9. The organic light emitting display device according to claim 7, wherein: When the thickness of the hole transport layer is to When the thickness of the first electrode of the first pixel is to or to The thickness of the first electrode of the second pixel is to or to The thickness of the first electrode of the third pixel is to or to And the thickness of the first electrode of the fourth pixel is to or to 10. The organic light emitting display device according to any one of claims 1 to 6, wherein: The light emitting portion includes: a first light-emitting portion, which is on the first electrode and includes a blue light-emitting layer; a second light-emitting portion on the first light-emitting portion and including a red light-emitting layer and two yellow-green light-emitting layers; and The third light-emitting portion is on the second light-emitting portion and includes a blue light-emitting layer.

11. The organic light emitting display device according to claim 10, wherein: The thickness of the first light emitting portion is to The thickness of the second light emitting portion is to The thickness of the third light emitting portion is to The distance between the center of the blue light-emitting layer of the first light-emitting portion and the second electrode is to The distance between the center of the red light-emitting layer of the second light-emitting portion and the second electrode is to The distance between the boundary of the two yellow-green light-emitting layers of the second light-emitting portion and the second electrode is to And the distance between the center of the blue light-emitting layer of the third light-emitting portion and the second electrode is to 12. The organic light emitting display device according to any one of claims 1 to 6, wherein: The first electrode includes a transparent conductive material, and the second electrode includes a metal material.

13. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; as well as a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include white pixels, red pixels, green pixels and blue pixels. Each of the plurality of organic light emitting diodes comprises: a first electrode; a first light-emitting portion, which is on the first electrode and includes a blue light-emitting layer; a second light-emitting portion, which is on the first light-emitting portion and includes a red light-emitting layer and two yellow-green light-emitting layers; a third light-emitting portion, which is on the second light-emitting portion and includes a blue light-emitting layer; and a second electrode on the third light-emitting portion, The first light-emitting portion, the second light-emitting portion and the third light-emitting portion respectively include a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer. The thickness of the first electrode of the white pixel is different from the thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from the thickness of the first electrode of the green pixel. wherein the thickness of the first electrode of the white pixel is equal to the thickness of the first electrode of the green pixel, and The thickness of the first electrode of the red pixel is equal to the thickness of the first electrode of the blue pixel.

14. The organic light emitting display device according to claim 13, wherein: The thickness of the hole transport layer of the first light-emitting portion is to 15. The organic light emitting display device according to claim 14, wherein: When the thickness of the hole transport layer of the first light-emitting portion is to When the thickness of the first electrode of the white pixel is to or to The thickness of the first electrode of the red pixel is to or to The thickness of the first electrode of the green pixel is to And the thickness of the first electrode of the blue pixel is to or to or to 16. The organic light emitting display device according to claim 14, wherein: When the thickness of the hole transport layer of the first light-emitting portion is to When the thickness of the first electrode of the white pixel is to or to The thickness of the first electrode of the red pixel is to or to The thickness of the first electrode of the green pixel is to or to And the thickness of the first electrode of the blue pixel is to or to 17. An organic light-emitting display device, comprising: a substrate comprising a plurality of pixels; as well as a plurality of organic light emitting diodes, the plurality of organic light emitting diodes being arranged on the substrate to correspond to the plurality of pixels respectively; a plurality of color filters, the plurality of color filters being disposed between the substrate and the plurality of organic light emitting diodes in some of the plurality of pixels; an encapsulation layer on the plurality of organic light emitting diodes; a packaging substrate on the packaging layer; as well as A bonding member provided between the packaging layer and the packaging substrate, The plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit light of different colors, and each of the plurality of pixels has a microcavity structure corresponding to the light emitted from the pixel, Wherein, each of the plurality of organic light emitting diodes comprises: a first electrode; a light-emitting portion, the light-emitting portion being on the first electrode and comprising a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer or an electron transport layer; and The second electrode on the light emitting portion, wherein the microcavity structure of the first pixel is different from the microcavity structure of the second pixel, and the microcavity structure of the second pixel is different from the microcavity structure of the third pixel, wherein the first pixel is a white pixel, the second pixel is a red pixel, the third pixel is a green pixel, and the fourth pixel is a blue pixel, wherein the thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the third pixel, and A thickness of the first electrode of the second pixel is equal to a thickness of the first electrode of the fourth pixel.

Images