Organic light emitting display device

Abstract

The invention relates to an organic light emitting display device. The organic light emitting display device includes: a first substrate including a plurality of pixels; a plurality of organic light emitting diodes disposed on the first substrate to respectively correspond to the plurality of pixels; an encapsulation layer disposed on the plurality of organic light emitting diodes, the encapsulation layer including at least one inorganic layer and at least one organic layer; an adhesive member disposed on the encapsulation layer; and a second substrate disposed on the adhesive member, in which the plurality of pixels include at least a first pixel, a second pixel, and a third pixel, and emit light of different colors, in which 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.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202011373404.7, filed on November 30, 2020, entitled "Organic Light Emitting Display Apparatus."

[0002] Cross Reference to Related Applications

[0003] This application claims priority to 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

[0004] The present disclosure relates to an organic light emitting display apparatus, and more particularly, to an organic light emitting display apparatus that minimizes color variation and luminance variation according to a viewing angle. BACKGROUND

[0005] An organic light emitting display apparatus does not require a separate light source, unlike a liquid crystal display apparatus. Accordingly, the organic light emitting display apparatus can be manufactured to have a light weight and a small thickness. Furthermore, since the organic light emitting display apparatus is driven at a low voltage, it is advantageous not only in terms of power consumption but also in terms of color implementation, response speed, viewing angle, and contrast ratio (CR). Accordingly, the light emitting display apparatus is being researched as a next-generation display.

[0006] An organic light emitting display apparatus is a self-emission display apparatus and uses an organic light emitting diode in which electrons and holes injected from a cathode for injecting electrons and an anode for injecting holes are injected into a light emitting layer, and an exciton formed by coupling the injected electrons and holes drops from an excited state to a ground state to emit light.

[0007] An organic light emitting display apparatus can be classified into a top emission type, a bottom emission type, and a dual emission type according to a direction in which light is emitted, and can also be classified into a passive matrix type and an active matrix type according to a driving method. SUMMARY

[0008] The inventors of the present disclosure developed an organic light emitting diode having a multi-stack structure that uses a stack of a plurality of light emitting parts to implement improved efficiency and lifespan characteristics of an organic light emitting display apparatus.

[0009] In the organic light emitting diode having the multi-stack structure, an emission region that emits light through recombination of electrons and holes is located in each of the plurality of light emitting parts. Accordingly, the organic light emitting diode including the multi-stack structure has high efficiency and is driven at a low current, so that the lifespan of the organic light emitting diode can be improved.

[0010] However, the inventors of the present disclosure recognized that, when organic light emitting diodes including the same structure are applied to all of the plurality of pixels that emit different colors of light, the color is changed or the luminance is changed according to the viewing angle in a certain pixel. For example, there is a problem that the optimized structure cannot be applied to the pixels that emit different colors of light, thereby degrading the display quality.

[0011] Therefore, the inventors of the present disclosure invented an improved organic light emitting display apparatus in which different structures are applied to each pixel that emits different colors of light.

[0012] One aspect of the present disclosure is to provide an organic light emitting display apparatus 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 a color viewing angle characteristic.

[0013] Another aspect of the present disclosure is to provide an organic light emitting display apparatus 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 a luminance viewing angle characteristic.

[0014] Another aspect of the present disclosure is to provide an organic light emitting display apparatus that improves display quality while minimizing a light process.

[0015] Additional features and aspects will be set forth in the description below, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application concepts presented herein. Other features and aspects of the present application concepts will become apparent from the description, by virtue of substituting the herein described structures, or by virtue of obvious modifications of the herein described structures, and from the claims and the drawings.

[0016] According to an embodiment of the present disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus includes a substrate including a plurality of pixels. The organic light emitting display apparatus also includes a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit different colors of light. Each of the plurality of organic light emitting diodes includes a first electrode, a light emitting part on the first electrode, and a second electrode on the light emitting part. A thickness of the first electrode of the first pixel is different from a thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from a thickness of the first electrode of the third pixel.

[0017] According to another embodiment of the disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus includes a substrate including a plurality of pixels. The organic light emitting display apparatus also includes a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels includes a white pixel, a red pixel, a green pixel, and a blue pixel. Each of the plurality of organic light emitting diodes includes a first electrode, a first light emitting part disposed on the first electrode and including a blue light emitting layer, a second light emitting part disposed on the first light emitting part and including a red light emitting layer and two yellow-green light emitting layers, a third light emitting part disposed on the second light emitting part and including a blue light emitting layer, and a second electrode on the third light emitting part. A thickness of the first electrode of the white pixel is different from a thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from a thickness of the first electrode of the green pixel.

[0018] According to another embodiment of the disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus includes a substrate including a plurality of pixels; and a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and emits different colors of light, each of the plurality of pixels having a microcavity structure corresponding to light emitted from the pixel. Each of the plurality of organic light emitting diodes includes a first electrode, a light emitting part on the first electrode, and a second electrode on the light emitting part. 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.

[0019] According to another embodiment of the disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus includes a substrate including a plurality of pixels; and a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels, respectively. The plurality of pixels includes a first pixel, a second pixel, a third pixel, and a fourth pixel, and emits different colors of light, each of the plurality of pixels having a microcavity structure corresponding to light emitted from the pixel. Each of the plurality of organic light emitting diodes includes a first electrode, a light emitting part on the first electrode, and a second electrode on the light emitting part. 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. To

[0020] According to another embodiment of the disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus includes a first substrate including a plurality of pixels; a plurality of organic light emitting diodes disposed on the first substrate to respectively correspond to the plurality of pixels; an encapsulation layer disposed on the plurality of organic light emitting diodes, wherein the encapsulation layer includes at least one inorganic layer and at least one organic layer; an adhesive structure disposed on the encapsulation layer; and a second substrate disposed on the adhesive structure, wherein the plurality of pixels includes at least a first pixel, a second pixel, and a third pixel, and emit different colors of light, wherein each of the plurality of organic light emitting diodes includes a first electrode; an emission part on the first electrode; and a second electrode on the emission part, wherein the emission part includes a first emission part on the first electrode and including a first emission layer; a second emission part on the first emission part; and a third emission part on the second emission part, at least one of the first emission part, the second emission part, and the third emission part is configured to emit blue light, wherein the first emission part, the second emission part, and the third emission part include a charge generation layer, wherein a thickness of the second emission part is To

[0021] Other apparatuses, systems, methods, features, and advantages will be or will become apparent to one with skill 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 within this description, be within the scope of the disclosure, and be protected by the following claims. Nothing in this section should be deemed to be limiting in any way. Further aspects and advantages will be discussed below in connection with embodiments of the disclosure. It will be appreciated that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed.

[0022] According to some embodiments of the disclosure, the thickness of the anode of the white pixel and the thickness of the anode of the red pixel are configured to be different from each other to minimize color variation according to a viewing angle.

[0023] According to some embodiments of the disclosure, the thickness of the anode of the red pixel and the thickness of the anode of the green pixel are configured to be different from each other to minimize luminance variation according to a viewing angle.

[0024] According to some embodiments of the disclosure, the thickness of the anode of the pixels emitting different colors of light are configured to be different from each other to improve display quality with minimal process.

[0025] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are intended to provide further explanation of the present inventive concepts claimed. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain various principles of the present disclosure.

[0027] Figure 1 is a plan view of an organic light emitting display apparatus according to an exemplary embodiment of the present disclosure.

[0028] Figure 2 is a cross-sectional view taken along line II-II' of Figure 1 .

[0029] Figure 3 is a view showing a structure of an organic light emitting diode of Figure 2 .

[0030] Figure 4 is a cross-sectional view of an organic light emitting display apparatus according to an exemplary embodiment of the present disclosure.

[0031] Figure 5 is a graph showing a cavity enhancement factor according to a wavelength of each viewing angle.

[0032] Figure 6 is a graph showing a luminance according to a viewing angle.

[0033] Figure 7 Color viewing angle characteristics according to a thickness of a first electrode and a thickness of a first hole transport layer of a first pixel are shown.

[0034] Figures 8A-8D Luminance characteristics according to a thickness of a first electrode and a thickness of a first hole transport layer of a first pixel, a second pixel, a third pixel, and a fourth pixel are shown.

[0035] Figures 9-14 is a schematic cross-sectional view of an organic light emitting display apparatus according to various exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0036] The advantages and features of the present disclosure and a method for achieving the advantages and features will become apparent from the exemplary embodiments described hereinafter and the accompanying drawings. However, the present disclosure is not limited to the exemplary embodiments disclosed herein and can be implemented in various forms. The exemplary embodiments are merely provided so that one skilled in the art can fully understand the disclosure and the range of the present disclosure. Therefore, the present disclosure will be limited only by the scope of the claims.

[0037] 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, like drawing reference numerals generally refer to the same element. Also, in the following description of the present disclosure, detailed explanations of known related technologies can be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Unless the terms such as "include" and "have" are used together with the term "only" as used herein, these terms are generally intended to allow addition of other components. Unless explicitly stated otherwise, any reference to a singular can include a plural.

[0038] Components are interpreted to include ordinary error ranges even if not explicitly stated.

[0039] When terms such as "upper," "above," "below," and "near" are used to describe the positional relationship between two components, unless these terms are used together with the term "immediately" or "directly," one or more components can be located between the two components.

[0040] When one element or layer is disposed "on" another element or layer, another layer (or layers) or another element (or elements) can be directly interposed on the other element or between them.

[0041] Although the terms "first," "second," etc. are used to describe various components, the components are not limited by these terms. These terms are used only to distinguish one component from other components, and do not limit any order. Therefore, the first component mentioned below can be the second component in the technical concept of the present disclosure.

[0042] Throughout the specification, like drawing reference numerals generally indicate like elements.

[0043] For ease of description, the size and thickness of each component shown in the drawings are shown, and the present disclosure is not limited to the size and thickness of the components shown.

[0044] Features of various embodiments of the present disclosure can be partially or wholly adhered to or combined with each other, and can be interlocked and operated in various technical ways, and the embodiments can be executed independently of each other or in conjunction with each other.

[0045] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.

[0046] Figure 1 is a plan view of an organic light emitting display apparatus according to an exemplary embodiment of the present disclosure. Figure 2 is a cross-sectional view taken along line II-II' of Figure 1 All components of the organic light emitting display apparatus according to all embodiments of the present disclosure are operatively coupled and configured.

[0047] Referring to Figure 1 and Figure 2 , the organic light emitting display apparatus 100 includes a substrate 110, a transistor 120, a color filter 130, an organic light emitting diode 140, and an encapsulation substrate 150.

[0048] The organic light emitting display apparatus 100 can be configured as a bottom emission type. For example, in the organic light emitting display apparatus 100 according to an exemplary embodiment of the present disclosure, light can be emitted to a rear surface of the substrate 110. According to the bottom emission type, light emitted from the organic light emitting diode 140 is emitted to a 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 light emitted from the organic light emitting diode 140 to travel to the lower portion of the substrate 110, the first electrode 141 can be formed of a transparent conductive material, and the second electrode 143 can be formed of a metal material having high reflectivity, which will be described below.

[0049] Referring to Figure 1 , the substrate 110 is a substrate that supports and protects some components of the organic light emitting display apparatus 100. The substrate 110 can be formed of a plastic material having flexibility. Further, since the organic light emitting display apparatus 100 is of a bottom emission type, in order to allow light to travel to the lower portion of the substrate 110, the substrate 110 can be formed of an insulating material having transparency. For example, the substrate 110 can be formed of transparent polyimide (PI).

[0050] The substrate 110 includes a display area AA and a non-display area NA.

[0051] The display area AA is disposed at a central portion of the substrate 110, and an image is displayed in the display area of the organic light emitting display apparatus 100. In the display area AA, display elements and various driving elements for driving the display elements can be disposed. For example, the display elements can be configured by organic light emitting diodes 140 including first electrodes 141, light emitting parts 142, and second electrodes 143. Also, various driving elements such as transistors, capacitors, or wires for driving the display elements can be disposed in the display area AA.

[0052] The plurality of pixels PX can be included in the display area AA. The plurality of pixels PX can be intersection points of a plurality of gate lines disposed in a first direction and a plurality of data lines disposed in a second direction different from the first direction. Here, the first direction can be a horizontal direction of Figure 1 , and the second direction can be a vertical direction of Figure 1 , but is not limited thereto. The plurality of pixels PX can include a plurality of first pixels PX1 that emit light having a different wavelength, a plurality of second pixels PX2, a plurality of third pixels PX3, and a plurality of fourth pixels PX4. For example, the plurality of first pixels PX1 can be white pixels, the plurality of second pixels PX2 can be red pixels, the plurality of third pixels PX3 can be green pixels, and the plurality of fourth pixels PX4 can be blue pixels.

[0053] The pixel PX is a minimum unit of configuring a screen, and each of the plurality of pixels PX can include an organic light emitting diode 140 and a driving element. The driving element can include a switching transistor and a driving transistor. The driving element can be electrically connected to a signal line, such as a gate line and a data line connected to a gate driver and a data driver disposed in the non-display area NA.

[0054] The non-display area NA is disposed in a peripheral area and a non-display area of the substrate 110, and an image is not displayed. The non-display area NA is disposed to surround the display area AA. Various components for driving the plurality of pixels PX disposed in the display area AA can be disposed in the non-display area NA. For example, a driving IC that provides a signal for driving the plurality of pixels PX, a driving circuit, a signal line, and a flexible film can be disposed. The driving IC can include a gate driver and a data driver, etc. The driving IC and the driving circuit can be disposed in a gate-in-panel (GIP) method, a chip on film (COF) method, a tape automated bonding (TAB) method, a tape carrier package (TCP) method, or a chip on glass (COG) method, etc.

[0055] Hereinafter, one pixel PX disposed in the display area AA of the organic light emitting display apparatus 100 will be described in more detail with reference to Figure 2 FIG. 2. Figure 2 The cross-sectional view illustrated in FIG. 2 can be a cross-sectional view of the second pixel PX2. However,Figure 2 The structure can be applied not only to the second pixel PX2, but also to the third pixel PX3 and the fourth pixel PX4 in the same way. Furthermore, except for not setting the color filter 130, such as... Figure 2 The same structure can also be applied to the first pixel PX1.

[0056] Reference Figure 2 A buffer layer 111 is disposed 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 alkaline components discharged from the substrate 110 and inhibit the diffusion of moisture and / or oxygen that permeates 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. Furthermore, the buffer layer 111 can be omitted depending on the type and material of the substrate 110 and the structure and type of the transistor 120.

[0057] Transistor 120 is disposed on buffer layer 111 to drive organic light-emitting diode 140. Transistor 120 may be disposed in each of a plurality of pixels in display area AA. Transistor 120 disposed in each of the plurality of pixels may serve as a driving element of organic light-emitting display device 100. For example, 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, transistor 120 is assumed to be a thin-film transistor, but is not limited thereto.

[0058] Transistor 120 includes an active layer 121, a gate electrode 122, a source electrode 123, and a drain electrode 124. Figure 2 The transistor 120 shown is a top-gate thin-film transistor, in which the gate electrode 122 is disposed on the active layer 121. However, the transistor 120 is not limited to this, and it can also be implemented as a bottom-gate thin-film transistor.

[0059] The active layer 121 of transistor 120 is disposed on buffer layer 111. When transistor 120 is driven, a channel is formed in active layer 121. Active layer 121 may be formed of oxide semiconductor or amorphous silicon (a-Si), polycrystalline silicon (poly-Si) or organic semiconductor, but is not limited thereto.

[0060] A gate insulating layer 112 is provided on the active layer 121. The gate insulating layer 112 can be formed as a single layer or a plurality of layers of silicon nitride SiNx or silicon oxide SiOx as an inorganic material. In the gate insulating layer 112, a contact hole 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 is formed. The gate insulating layer 112 can be formed on the entire surface of the substrate 110 as shown in FIG. 1, or patterned to have the same width as the gate electrode 122, but is not limited thereto. Figure 2

[0061] The gate electrode 122 is provided on the gate insulating layer 112. The gate electrode 122 is provided on the gate insulating layer 112 so as to overlap with the channel region of the active layer 121. The gate electrode 122 can 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 of them, or a multilayer thereof, but is not limited thereto.

[0062] An interlayer insulating layer 113 is provided on the gate electrode 122. The interlayer insulating layer 113 can be formed as a single layer or a plurality of layers of silicon nitride SiNx or silicon oxide SiOx as an inorganic material. In the interlayer insulating layer 113, a contact hole 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 is formed.

[0063] 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 the contact holes formed in the gate insulating layer 112 and the interlayer insulating layer 113. The source electrode 123 and the drain electrode 124 can 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 of them, or a multilayer thereof. However, the present disclosure is not limited thereto.

[0064] For ease of description, only a drive transistor among various transistors 120 included in the display device 100 is shown in Figure 2 , but other transistors such as a switching transistor can also be provided.

[0065] Referring to Figure 2 , a passivation layer 114 for protecting the transistor 120 is provided on the transistor 120. A contact hole that exposes the drain electrode 124 of the transistor 120 is formed in the passivation layer 114. Even in Figure 2 ​A contact hole exposing the drain electrode 124 is formed in the passivation layer 114, and a contact hole exposing the source electrode 123 can also be formed. The passivation layer 114 can be configured as a single layer or multiple layers of silicon nitride SiNx or silicon oxide SiOx. However, the passivation layer 114 can be omitted according to an exemplary embodiment of the present disclosure.

[0066] A color filter 130 is disposed on the passivation layer 114. The color filter 130 can be disposed to correspond to the emission area defined by the bank 116. The color filter 130 converts light emitted from the light emitting part 142 of the organic light emitting diode 140 into light having a specific color. Since Figure 2 The second pixel PX2 shown is a red pixel, so the color filter 130 can be a red color filter. Also, a third pixel PX3, which is a green pixel, includes a green color filter, and a fourth pixel PX4, which is a blue pixel, includes a blue color filter. White light emitted from the light emitting part 142 is converted into red light, green light, and blue light by the color filter 130 of the corresponding pixel PX. Meanwhile, the color filter 130 can not be disposed in the first pixel PX1, which is a white pixel.

[0067] An overcoat layer 115 is disposed 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 in the overcoat layer 115. Even in Figure 3 A contact hole exposing the source electrode 123 can also be formed in the overcoat layer 115. The overcoat layer 115 can be formed of any one of an acrylic resin, an epoxy resin, a phenol resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polystyrene resin, a polyphenylene sulfide resin, benzocyclobutene, and a photoresist, but is not limited thereto.

[0068] Referring to Figure 2 The organic light emitting diode 140 is disposed 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 part 142 disposed on the first electrode 141, and a second electrode 143 formed on the light emitting part 142. Here, the first electrode 141 can be an anode electrode, and the second electrode 143 can be a cathode electrode.

[0069] The first electrode 141 is disposed on the outer coating layer 115 to be electrically connected to the drain electrode 124 through a contact hole formed in the passivation layer 114 and the outer coating layer 115. The first electrode 141 can be formed of a transparent conductive material having a high work function to supply holes to the light emitting part 142. For example, the first electrode 141 can 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.

[0070] Although the first electrode 141 is electrically connected to the drain electrode 124 of the transistor 120 through the contact hole in Figure 2 , the first electrode 141 can also be configured to be electrically connected to the source electrode 123 of the transistor 120 through the contact hole, depending on the type of the transistor 120 and the design method of the driving circuit.

[0071] The bank 116 is disposed on the first electrode 141 and the outer coating layer 115. The bank 116 can cover the edge or periphery of the first electrode 141 of the organic light emitting diode 140 to define an emission area. The bank 116 is disposed at a boundary between adjacent pixels to reduce color mixing of light emitted from the organic light emitting diode 140 of each of the plurality of pixels. The bank 116 can be formed of an organic material. For example, the bank 116 can be formed of a polyimide resin, an acrylic resin, or a benzocyclobutene resin, but is not limited thereto.

[0072] The light emitting part 142 is disposed on the first electrode 141. The light emitting part 142 can be a white light emitting layer that emits white light. The white light emitted from the light emitting part 142 can be converted into any one of red, green, and blue by the color filter 130. In addition, the light emitting part 142 can 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, etc. This will be described below with reference to Figure 3 .

[0073] The second electrode 143 is disposed on the light emitting part 142. The second electrode 143 supplies electrons to the light emitting part 142. The second electrode 143 can be formed of a conductive material having a low work function. For example, the second electrode 143 can be formed of any one or more of an opaque conductive metal such as magnesium (Mg), silver (Ag), aluminum (Al), or calcium (Ca), or an alloy thereof, but is not limited thereto.

[0074] Referring to Figure 3An encapsulation layer 117 is disposed on the organic light-emitting diode 140. The encapsulation layer 117 can cover the organic light-emitting diode 140. The encapsulation layer 117 can protect the organic light-emitting diode 140 from moisture, oxygen, and external shocks. The encapsulation layer 117 can be formed by alternately stacking multiple inorganic layers and multiple organic layers. For example, the inorganic layers can be formed from inorganic materials such as silicon nitride (SiNx), silicon oxide (SiOx), and aluminum oxide (AlOx), while the organic layers can be formed from epoxy resin or acrylic polymers, but they are not limited to these.

[0075] A packaging substrate 150 is disposed on the packaging layer 117. The packaging substrate 150, together with the packaging layer 117, can protect the organic light-emitting diode 140 from moisture, oxygen, and external shock. The packaging substrate 150 may be formed of a metallic material such as aluminum (Al), nickel (Ni), chromium (Cr), or an alloy of iron (Fe) and nickel, but is not limited thereto.

[0076] Reference Figure 2 An adhesive member 118 is disposed 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 an adhesive material 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.

[0077] In the following text, reference will be made to Figure 3 The structure of an organic light-emitting diode 140 according to an exemplary embodiment of the present disclosure is described in detail.

[0078] Figure 3 It is shown Figure 4 A view of the structure of an organic light-emitting diode. Figure 4 The structure of the organic light-emitting diode 140 can be applied to some or all of the multiple pixels PX of the organic light-emitting display device 100.

[0079] Reference Figure 2 The organic light-emitting diode 140 includes a first electrode 141, a light-emitting part 142, and a second electrode 143.

[0080] A light-emitting portion 142 is disposed between the first electrode 141 and the second electrode 143. The light-emitting portion 142 is a region that emits light through the coupling of 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.

[0081] The first light emitting part 142-1 is disposed on the first electrode 141. The first light emitting part 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. Since the first light emitting layer 221 is a fluorescent emission layer, the first light emitting part 142-1 can be a fluorescent emission part. As another example, the first light emitting part 142-1 can not include the first N-type charge generation layer 241.

[0082] 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 transport holes from the first electrode 141 to the first light emitting layer 221.

[0083] The first hole transport layer 211 can 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 can be formed of a material including any one or more of NPD (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-2,2'-dimethylphenylamine), NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-phenylamine), TPD (N,N'-bis-(3-methylphenyl)-N,N'-bis-(phenyl)-phenylamine), Spiro-TAD (2,2',7,7'-tetrakis(N,N-diphenylamino)-9,9'-spirobifluorene), and MTDATA (4,4',4"-tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine), but is not limited thereto.

[0084] The thickness of the first hole transport layer 211 can be to When the thickness of the first hole transport layer 211 is less than , the first hole transport layer 211 can not smoothly transport holes to the first light emitting layer 221. When the thickness of the first hole transport layer 211 exceeds , the thickness of the organic light emitting display apparatus 100 can be excessively thick due to the thickness of the first hole transport layer 211.

[0085] The second hole transport layer 212 can serve 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 crossing over the first hole transport layer 211 and the second hole transport layer 212. The electron blocking layer blocks the movement of electrons to improve the coupling of holes and electrons in the first light emitting layer 221 and increase 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.

[0086] 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, a region in which excitons are generated is referred to as an emission region (or an emission zone) or a recombination zone.

[0087] The first light emitting layer 221 is disposed between the second hole transport layer 212 and the first electron transport layer 231. The first light emitting layer 221, which is a fluorescent emission layer, is disposed in the first light emitting part 142-1 in which excitons are generated, and includes a material that emits light of a specific color. The first light emitting layer 221 can include a material that emits blue light.

[0088] The first light emitting layer 221 can have a host-dopant system. For example, the first light emitting layer 221 can have a system in which an emission dopant material having a smaller weight ratio is doped on a host material occupying a larger weight ratio. The host of the first light emitting layer 221 can be configured by a single material or a mixed host formed by mixed 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 range of wavelengths of light emitted from the first light emitting layer 221 can be 440 nm to 480 nm.

[0089] The blue fluorescent dopant material is a material capable of emitting blue light. An EL spectrum of light emitted from the first light emitting layer 221 on which the blue fluorescent dopant material is doped can have a peak in a blue wavelength region, a peak in a deep blue wavelength region, or a peak in a sky blue wavelength region.

[0090] The host material of the first light emitting layer 221 can be formed by mixing one or more of Alq3 (tris(8-hydroxy-quinoline)aluminum), ADN (9,10-di(benzene-2-yl)anthracene), and BSBF (2-(9,9-spirofluorene-2-yl)-9,9-spirofluorene), but is not limited thereto.

[0091] The blue fluorescent dopant material of the first light emitting layer 221 can be formed of a material of one or more of a pyrene series material having a substituted arylamine-based compound, an iridium (Ir) 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)styryl]-9,9'-spirobifluorene), distyrylbenzene (DSB), distyrylarylene (DSA), a PFO-based polymer, and a PPV-based polymer, but is not limited thereto.

[0092] The first electron transport layer 231 is disposed 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 can transport the supplied electrons to the first light emitting layer 221.

[0093] The first electron transport layer 231 can function as a hole blocking layer HBL. The hole blocking layer can inhibit holes that do not participate in recombination from leaking from the first light emitting layer 221.

[0094] The first electron transport layer 231 can 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-(phenylphenolato)aluminum), Liq (8-hydroxyquinolyl-lithium), TPBi (2,2',2"-(1,3,5-benzene-tribenzene)-tris(1-phenyl-1-hydrogen-benzimidazole), Liq (8-hydroxyquinoline lithium), and BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), but is not limited thereto.

[0095] The first N-type charge generation layer 241 is disposed on the first electron transport layer 231. The first N-type charge generation layer 241 injects electrons into the first light emitting part 142-1. The first N-type charge generation layer 241 is disposed between the first light emitting part 142-1 and a second light emitting part 142-2 adjacent to the first light emitting part 142-1 to supply charges to the first light emitting part 142-1.

[0096] The first N-type charge generation layer 241 can include an N-type dopant material and an N-type host material. The N-type dopant material can be a metal of Group 1 and Group 2 of the periodic table, an organic material capable of injecting an electron, or a mixture thereof. For example, the N-type dopant material can be any one of alkali metals and alkaline earth metals. For example, the first N-type charge generation layer 241 can 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 host material can be formed of a material capable of transporting an electron, for example, can be formed of one or more of Alq3 (tris(8-hydroxyquinolinoato)aluminum), Liq (lithium 8-hydroxyquinolinate), PBD (2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole), TAZ (3-(4-biphenylyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole), Spiro-PBD, and BAlq (bis(2-methyl-8-quinolinate)-4-(phenylphenol)aluminum), SAlq, TPBi (2,2',2"-(1,3,5-benzotriazol)-tris(1-phenyl-1-hydrogen-benzimidazole), oxadiazole, triazole, phenanthroline, benzoxazole, and benzothiazole, but is not limited thereto.

[0097] The thickness of the first light emitting part 142-1 excluding the first hole transport layer 211 can be to Because the thickness of the first hole transport layer 211 is to Therefore, the total thickness of the first light emitting part 142-1 can be to Further, the distance between the center of the first light emitting layer 221 and the first surface of the second electrode 143 can be to

[0098] The second light emitting part 142-2 is disposed on the first light emitting part 142-1. The second light emitting part 142-2 includes a first P-type charge generation layer 242, a third hole transport layer 213, a second light emitting layer 222, a third light emitting layer 223, a fourth light emitting layer 224, a second electron transport layer 232, and a second N-type charge generation layer 243. Because the second light emitting layer 222, the third light emitting layer 223, and the fourth light emitting layer 224 are phosphorescent emission layers, the second light emitting part 142-2 can be a phosphorescent emission part. As another example, the second light emitting part 142-2 can not include the first P-type charge generation layer 242 and the second N-type charge generation layer 243.

[0099] The first P-type charge generation layer 242 is disposed on the first N-type charge generation layer 241. The first P-type charge generation layer 242 injects holes into the second light emitting part 142-2. The first P-type charge generation layer 242 is disposed between the first light emitting part 142-1 and the second light emitting part 142-2 adjacent to each other to supply charges to the second light emitting part 142-2.

[0100] The first P-type charge generation layer 242 can include a P-type dopant material and a P-type host material. The P-type dopant material can be formed of a metal oxide, an organic material such as tetrafluorotetracyanoquinodimethane (F4-TCNQ), HAT-CN (hexaazatriphenyl-hexacarbonitrile), or hexaazatriphenyl, or a metal material such as V2O5, MoOx, and WO3, but is not limited thereto. The P-type host material can be formed of a material capable of transporting holes, for example, can be formed of a material including any one or more of NPD (N,N-dinaphthyl-N,N'-diphenylbenzidine) (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-2,2'-dimethylbenzidine), TPD (N,N'-bis-(3-methylphenyl)-N,N'-bis-(phenyl)-benzidine), and methyl t-butyl ether (4,4',4"-tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine), but is not limited thereto.

[0101] The third hole transport layer 213 is disposed on the first P-type charge generation layer 242. The third hole transport layer 213 is an organic layer that smoothly transports 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 part 142-1, and thus redundant descriptions will be omitted.

[0102] The second light emitting layer 222, the third light emitting layer 223, and the fourth light emitting layer 224 are sequentially disposed 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 disposed 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 disposed in the second light emitting part 142-2 in which excitons are formed, and include a material that emits a specific color of light. 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 a material that emits 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 part 142-2 can be configured by the second light emitting layer 222 and the third light emitting layer 223.

[0103] Like 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 by a mixed host or a premixed host, the host can be uniformly deposited in the light-emitting layer, and thus the efficiency of the light-emitting layer can be improved.

[0104] The second light-emitting layer 222, which is a phosphorescent emission layer, can include a first hole type host and a first electron type host, and the second light-emitting layer 222 is 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 can range from 600 nm to 650 nm.

[0105] 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 can have a peak in the red wavelength range.

[0106] The host material of the second light-emitting layer 222 can 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.

[0107] The red phosphorescent dopant material of the second light-emitting layer 222 can be formed of a material including any one or more of iridium (Ir) ligand complexes including Ir(ppy)3 (tris(2-phenylpyridine)iridium(III)), Ir(ppy)2(acac) (bis(2-phenylpyridine)(acetylacetonate)iridium(III)), PIQIr(acac) (bis(1-phenylisoquinoline)acetylacetonate iridium), PQIr(acac) (bis(1-phenylquinoline)acetylacetonate iridium), PQIr (tris(1-phenylquinoline)iridium), Ir(piq)3 (tris(1-phenylisoquinoline)iridium), Ir(piq)2(acac) (bis(1-phenylisoquinoline)(acetylacetonate)iridium), PtOEP (octaethylporphyrin platinum), PBD:Eu(DBM)3(Phen), and perylene, but is not limited thereto.

[0108] 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 can be different in each light-emitting layer.

[0109] For example, the third light-emitting layer 223 is disposed closer to the first electrode 141 that supplies holes than the fourth light-emitting layer 224, and the fourth light-emitting layer 224 is disposed closer to the second electrode 143 that supplies electrons than the third light-emitting layer 223. In the third light-emitting layer 223, the ratio of the second electron-type host can be higher to be smoothly supplied with electrons, and in the fourth light-emitting layer 224, the ratio of the second hole-type host can be higher to be smoothly supplied with holes. Accordingly, the ratio of the second hole-type host to the second electron-type host can vary according to the type of carriers that are relatively difficult to reach each light-emitting layer.

[0110] 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 can be yellow-green light-emitting layers, and the range of wavelengths of light emitted from the third light-emitting layer 223 and the fourth light-emitting layer 224 can be 510 nm to 590 nm.

[0111] 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 lower than the first peak in the red wavelength region. Alternatively, the EL spectrum can 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.

[0112] The host material of the third light-emitting layer 223 and the fourth light-emitting layer 224 can 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.

[0113] The yellow-green dopant material of the third light-emitting layer 223 and the fourth light-emitting layer 224 can be formed of a material including any one or more 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)(acetylacetone)iridium(III)) or Alq3 (tris(8-hydroxyquinoline)aluminum), but is not limited thereto.

[0114] The range of wavelengths of the second light emitting part 142-2 including the second light emitting layer 222, the third light emitting layer 223, and the fourth light emitting layer 224 can be 510 nm to 650 nm. For example, the range of wavelengths of the second light emitting layer 222 as a red light emitting layer is 600 nm to 650 nm. Also, when a yellow-green dopant material has a peak in a yellow-green wavelength region, the range of wavelengths of the third light emitting layer 223 and the fourth light emitting layer 224 as yellow-green light emitting layers can be 510 nm to 590 nm. Thus, the range of wavelengths of the second light emitting part 142-2 can be a minimum of 510 nm to a maximum of 650 nm.

[0115] The second electron transport layer 232 is disposed on the fourth light emitting layer 224. The second electron transport layer 232 transports the electrons supplied from the second N-type charge generation layer 243 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 part 142-1, and thus redundant descriptions will be omitted.

[0116] The second N-type charge generation layer 243 is disposed on the second electron transport layer 232. The second N-type charge generation layer 243 injects electrons into the second light emitting part 142-2. The second N-type charge generation layer 243 is disposed between the second light emitting part 142-2 and the third light emitting part 142-3 adjacent to each other to supply charges to the second light emitting part 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 part 142-1, and thus redundant descriptions will be omitted.

[0117] The total thickness of the second light emitting part 142-2 can be to Also, the distance between the center of the second light emitting layer 222 and the first surface of the second electrode 143 can be to The distance between the boundary of the third light emitting layer 223 and the fourth light emitting layer 224 as the centers of the third light emitting layer 223 and the fourth light emitting layer 224 and the first surface of the second electrode 143 can be to

[0118] The third light emitting part 142-3 is disposed on the second light emitting part 142-2. The third light emitting part 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. Since the fifth light emitting layer 225 is a fluorescent emission layer, the third light emitting part 142-3 can serve as a fluorescent emission part. As another example, the third light emitting part 142-3 can not include the second P-type charge generation layer 244.

[0119] 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 part 142-3. The second P-type charge generation layer 244 is disposed between the second light emitting part 142-2 and the third light emitting part 142-3 adjacent to each other to supply charges to the third light emitting part 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 part 142-2, and thus redundant descriptions will be omitted.

[0120] 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 transport 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 part 142-1, and thus redundant descriptions will be omitted.

[0121] 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 part 142-3 in which excitons are formed, and includes a material that emits light of a specific color. For example, the fifth light emitting layer 225 can 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 part 142-1, and thus redundant descriptions will be omitted.

[0122] The third electron transport layer 233 is disposed on the fifth light emitting layer 225. Electrons are supplied to the third electron transport layer 233 from the second electrode 143. The third electron transport layer 233 transports 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 part 142-1, and thus redundant descriptions will be omitted.

[0123] An electron injection layer 251 is disposed 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 to the fifth light emitting layer 225. The electron injection layer 251 can be formed of a material including any one or more of 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 can be omitted.

[0124] The total thickness of the third light emitting part 142-3 can be to Further, the distance between the center of the fifth light emitting layer 225 and the first surface of the second electrode 143 can be to

[0125] The organic light emitting diode 140 is an organic light emitting diode 140 having a three-stack structure in which the first light emitting part 142-1, the second light emitting part 142-2, and the third light emitting part 142-3 are stacked. Light finally emitted from the light emitting part 142 can be achieved by mixing light emitted from the first light emitting part 142-1, the second light emitting part 142-2, and the third light emitting part 142-3. Accordingly, the design in the light emitting part 142 can vary depending on the color of light to be achieved. For example, the first light emitting part 142-1 and the third light emitting part 142-3, which are fluorescent emission parts, emit blue light, and the second light emitting part 142-2, which is a phosphorescent emission part, emits red and yellow-green light. Accordingly, the organic light emitting diode 140 according to the exemplary embodiment of the disclosure can be an organic light emitting diode 140 that emits white light.

[0126] Figure 3 is a schematic cross-sectional view of an organic light emitting display apparatus according to an exemplary embodiment of the disclosure. In Figure 4 , for convenience of description, only the substrate 110 and the organic light emitting diodes 140A, 140B, 140C, and 140D disposed on the substrate 110 of the organic light emitting display apparatus 100 of Figure 5 are illustrated. The configurations of the organic light emitting diodes 140A, 140B, 140C, and 140D can be the same as those of the organic light emitting diode 140 illustrated in Figure 6 .

[0127] Referring to Figure 5The organic light emitting display apparatus 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 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. Light emitted from the first organic light emitting diode 140A is white light, white light emitted from the second organic light emitting diode 140B can be converted into red light by the color filter 130. White light emitted from the third organic light emitting diode 140C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 140D can be converted into blue light by the color filter 130.

[0128] The first organic light emitting diode 140A includes a first electrode 141A, a light emitting part 142A, and a second electrode 143A. The second organic light emitting diode 140B includes a first electrode 141B, a light emitting part 142B, and a second electrode 143B. The third organic light emitting diode 140C includes a first electrode 141C, a light emitting part 142C, and a second electrode 143C. The fourth organic light emitting diode 140D includes a first electrode 141D, a light emitting part 142D, and a second electrode 143D. The light emitting parts 142A, 142B, 142C, and 142D of the first organic light emitting diode 140A, the second organic light emitting diode 140B, the third organic light emitting diode 140C, and the fourth organic light emitting diode 140D can have the same configuration. Also, the second electrodes 143A, 143B, 143C, and 143D of the first organic light emitting diode 140A, the second organic light emitting diode 140B, the third organic light emitting diode 140C, and the fourth organic light emitting diode 140D can have the same configuration. For example, only the thicknesses of the first electrodes 141A, 141B, 141C, and 141D of the first organic light emitting diode 140A, the second organic light emitting diode 140B, the third organic light emitting diode 140C, and the fourth organic light emitting diode 140D can be different.

[0129] The first pixel PX1, the second pixel PX2, the third pixel PX3, and the fourth pixel PX4 can have microcavity structures corresponding to light emitted from the respective pixels PX. According to the microcavity structures, light is repeatedly reflected between the first electrode 141 and the second electrode 143, which are spaced apart from each other by an optical length therebetween, so that light of a specific wavelength is amplified by constructive interference. Accordingly, the second pixel PX2 can have a microcavity structure in which light of a wavelength corresponding to red can be amplified. The third pixel PX3 can have a microcavity structure in which light of a wavelength corresponding to green can be amplified. The fourth pixel PX4 can have a microcavity structure in which light of a wavelength corresponding to blue can be amplified.

[0130] The microcavity can be implemented by the thickness of the first electrode 141 as a transparent conductive material and the difference in refractive index 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 difference in refractive index between the first electrode 141 and the first hole transport layer 211 can increase. Accordingly, more light can be reflected by the first electrode 141, so that light can be amplified more effectively. Further, in order to implement an optimized microcavity effect in 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.

[0131] In order to improve the color viewing angle feature, 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 can not be applied to the first pixel PX1 and the second pixel PX2, i.e., different microcavity structures can 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 can change according to the viewing angle. Accordingly, 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 the color change according to the viewing angle of the organic light emitting display apparatus 100.

[0132] Here, the color viewing angle refers to the degree of change of white according to the viewing angle in a state in which the screen of the display apparatus is set to white having a color temperature of 10000 K. When the degree of change of white according to the viewing angle is small, the color viewing angle feature is good, and when the degree of change of white according to the viewing angle is large, the color viewing angle feature is not good.

[0133] To improve the brightness viewing angle characteristic, 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 can not be applied to the second pixel PX2 and the third pixel PX3, i.e., different microcavity structures can 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 can change according to the viewing angle. Accordingly, 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 change in brightness according to the viewing angle of the organic light emitting display apparatus 100.

[0134] Here, the brightness viewing angle refers to the degree of reduction in brightness according to the viewing angle. When the degree of change in brightness according to the viewing angle is small, the brightness viewing angle characteristic is good, and when the degree of change in brightness according to the viewing angle is large, the brightness viewing angle characteristic is not good.

[0135] Hereinafter, the color change characteristic and the brightness change characteristic according to the viewing angle will be described with reference to Figure 5 and Figure 5

[0136] Figure 5 is a graph showing a cavity enhancement factor according to the wavelength of each viewing angle. In Figure 5 , the microcavity structure of the second pixel PX2 is applied to the first pixel PX1. For example, Figure 6 is a graph measured by applying the thickness of the first electrode 141A of the first pixel PX1 as and applying the thickness of the first hole transport layer 211 as Figure 6 The graph of is measured at the viewing angles of 0°, 15°, 30°, 45°, and 60°.

[0137] The cavity enhancement factor indicates the ratio of the power when an exciton is in the organic light emitting diode 140 to the power when the exciton is in the air (assuming 1). The power when the exciton is in the air refers to the power when the microcavity is not applied. For example, the cavity enhancement factor can refer to the amplification of light by the microcavity.

[0138] Referring to Figure 5 ​​It is confirmed that the peak of the cavity enhancement factor varies according to the viewing angle. For example, because the distance of the microcavity varies according to the viewing angle, the peak to be amplified can vary. It is confirmed that, as the viewing angle increases, the peak at about 650 nm as the red R region and the peak at about 470 nm as the blue B region sharply decrease. For example, the peak in the red R region can move to the blue B region. However, it is confirmed that, even if the viewing angle increases, the cavity enhancement factor at about 550 nm as the green G region remains at a constant level. For example, the greater the viewing angle, the smaller the cavity enhancement factor of the red R region and the blue B region, but the cavity enhancement factor in the green G region is maintained. Accordingly, the degree of amplification of light in the green G region relatively increases, so that the white light emitted from the first pixel PX1 can be greenish. In other words, the color of the white light of the first pixel PX1 varies according to the viewing angle, so that the color viewing angle characteristic can be deteriorated. As a result, when the thickness of the first electrode 141A of the first pixel PX1 and the thickness of the first electrode 141B of the second pixel PX2 are configured to be different, the color viewing angle characteristic can be improved.

[0139] Figure 6 is a graph showing luminance according to a viewing angle. Figure 6 is measured under the same conditions as Figures 7-8D . The normalized intensity of Figure 7 may refer to luminance.

[0140] Referring to Figures 8A-8D , it is confirmed that, as the viewing angle Angle increases, the luminance of the red R light decreases, but the luminance of the green G light remains at a constant level. For example, the greater the viewing angle, the greater the luminance of the green G light relatively, so that the luminance deviation of the red R light and the green G light can increase. Accordingly, as the viewing angle increases, the white light can be greenish. In other words, the luminance of the white light changes according to the viewing angle, so that the luminance viewing angle characteristic can be deteriorated. For example, the luminance deviation of 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 can be configured to be different.

[0141] Hereinafter, the thickness of the first electrode will be described with reference to Figures 7-8D .

[0142] Figure 7 shows the color viewing angle characteristic according to the thickness of the first electrode and the first hole transport layer of the first pixel. Figures 8A-8D shows the luminance characteristic according to the thickness of the first electrode and the first hole transport layer of the first pixel, the second pixel, the third pixel, and the fourth pixel. Figure 7 The X-axis of Figure 8A represents the thickness of the first electrode, and the Y-axis represents the thickness of the first hole transport layer. The greater the value of Δu'v' of , the worse the color viewing angle characteristic.Figure 8B CDM -2 The larger the value, the worse the brightness viewing angle characteristics.

[0143] Reference Figure 8C and Figure 8D It is confirmed that when the thickness range of the first hole transport layer 211 of the first pixel PX1 is... to At that time, the first electrode 141A is in to or to It exhibits excellent color viewing angle characteristics and brightness viewing angle characteristics within a certain thickness range. Furthermore, when the thickness range of the first hole transport layer 211 of the first pixel PX1 is... to At that time, the first electrode 141A can be to or to It exhibits excellent color viewing angle characteristics and brightness viewing angle characteristics within a certain thickness range.

[0144] Reference Figure 4 When the thickness range of the first hole transport layer 211 of the second pixel PX2 is to At that time, the thickness range of the first electrode 141B can be to or to When the thickness range of the first hole transport layer 211 of the second pixel PX2 is to At that time, the thickness range of the first electrode 141B can be to or to The second pixel PX2 can have excellent brightness characteristics within the aforementioned range.

[0145] Reference Figure 4 When the thickness range of the first hole transport layer 211 of the third pixel PX3 is to At that time, the thickness range of the first electrode 141C can be to When the thickness range of the first hole transport layer 211 of the third pixel PX3 is to At that time, the thickness range of the first electrode 141C can be to or to The third pixel PX3 can have excellent luminance characteristics within the above range.

[0146] Referring to Figure 9 When the thickness range of the first hole transport layer 211 of the fourth pixel PX4 is to , the thickness range of the first electrode 141D can be to or to or to When the thickness range of the first hole transport layer 211 of the fourth pixel PX4 is to , the thickness range of the first electrode 141D can be to or to The fourth pixel PX4 can have excellent luminance characteristics within the above range.

[0147] The thickness of the first electrode 141A of the first pixel PX1, the thickness of the first electrode 141B of the second pixel PX2, the thickness of the first electrode 141C of the third pixel PX3, and the thickness of the first electrode 141D of the fourth pixel PX4 can be set within the above range. The thickness of the first electrode 141A of the first organic light emitting diode 140A can 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 can be set to be different from the thickness of the first electrode 141C of the third organic light emitting diode 140C.

[0148] Referring again to Figure 9 , 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 apparatus 100 can be formed by performing a photo process twice. Accordingly, the photo process for forming the first electrodes 141A, 141B, 141C, and 141D is minimized, and color variation and luminance variation according to a viewing angle are also minimized.

[0149] Meanwhile, although in Figure 4In the embodiment, the thickness of the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 is 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 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 can 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.

[0150] In an organic light emitting display apparatus, anodes of white, red, green, 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 light emitted from the white pixel changes according to a viewing angle, such that there is a problem in that a color viewing angle characteristic is deteriorated. Also, the brightness of light emitted from the red, green, or blue pixel changes according to a viewing angle, such that there is a problem in that a brightness viewing angle characteristic is deteriorated.

[0151] The organic light emitting display apparatus 100 according to the exemplary embodiment of the disclosure adjusts the thickness of the first electrode 141 of each of the first, second, third, and fourth pixels PX1, PX2, PX3, and PX4 that emit light of different colors. Accordingly, the color viewing angle characteristic and the brightness viewing angle characteristic can be improved. For example, the thickness of the first electrode 141A of the first pixel PX1 that is a white pixel and the thickness of the first electrode 141B of the second pixel PX2 that is a red pixel are configured to be different, so that the color viewing angle characteristic can be improved. Also, the thickness of the first electrode 141B of the second pixel PX2 that is a red pixel and the thickness of the first electrode 141C of the third pixel PX3 that is a green pixel are configured to be different, so that the brightness viewing angle characteristic can be improved.

[0152] Also, the thickness of the first electrode 141A of the first pixel PX1 and the thickness of the first electrode 141C of the third pixel PX3 can be configured to be equal to each other, and the thickness of the first electrode 141B of the second pixel PX2 and the thickness of the first electrode 141D of the fourth pixel PX4 can be configured to be equal to each other. Accordingly, the first electrode 141A of the first pixel PX1 and the first electrode 141C of the third pixel PX3 can be formed at the same time, and the first electrode 141B of the second pixel PX2 and the first electrode 141D of the fourth pixel PX4 can be formed at the same time. For example, the first electrode 141 of the organic light emitting display apparatus 100 can be formed by performing a photo process twice. Accordingly, the photo process can be minimized, and a microcavity structure optimized for each pixel PX1, PX2, PX3, PX4 can also be applied.

[0153] Figure 9is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for a 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 apparatus 900 is substantially the same as the organic light emitting display apparatus 100 of Figure 10 and thus redundant descriptions will be omitted.

[0154] Referring to Figure 10 , the organic light emitting display apparatus 900 includes a first organic light emitting diode 940A corresponding to the first pixel PX1, a second organic light emitting diode 940B corresponding to the second pixel PX2, a third organic light emitting diode 940C corresponding to the third pixel PX3, and a fourth organic light emitting diode 940D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, light emitted from the first organic light emitting diode 940A is white light, white light emitted from the second organic light emitting diode 940B can be converted into red light by the color filter 130. White light emitted from the third organic light emitting diode 940C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 940D can be converted into blue light by the color filter 130.

[0155] The thickness of the first electrode 941A of the first pixel PX1 can 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 can 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, and thus color viewing angle characteristics of the organic light emitting display apparatus 900 can be improved. Also, 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, and thus brightness viewing angle characteristics of the organic light emitting display apparatus 900 can be improved.

[0156] Here, when the thickness of the first hole transport layer 211 is to , the thickness of the first electrode 941A is to or to Also, 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 the thickness of the first electrode 941A is to or to Further, 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

[0157] Although in Figure 4 , 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 greater than the thickness of the first electrode 941B of the second pixel PX2, 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 can be less than the thickness of the first electrode 941B of the second pixel PX2.

[0158] The organic light emitting display apparatus 900 according to another exemplary embodiment of the present disclosure configures the thickness of the first electrode 941A of the first pixel PX1 to be different from the thickness of the first electrode 941B of the second pixel PX2, and thus color viewing angle characteristics can be improved. Further, 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, and thus luminance viewing angle characteristics can be improved.

[0159] Further, a thickness of the first electrode 941A of the first pixel PX1, a thickness of the first electrode 941C of the third pixel PX3, and a 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 apparatus 900 can be formed by performing a photo process twice. Accordingly, the photo process can be minimized, and a microcavity structure optimized for each pixel PX1, PX2, PX3, PX4 can also be applied.

[0160] Figure 10 is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for a 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 apparatus 1000 of Figure 11 The organic light emitting display apparatus 100 according to

[0161] Referring to Figure 11 The organic light emitting display apparatus 1000 includes a first organic light emitting diode 1040A corresponding to the first pixel PX1, a second organic light emitting diode 1040B corresponding to the second pixel PX2, a third organic light emitting diode 1040C corresponding to the third pixel PX3, and a fourth organic light emitting diode 1040D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, light emitted from the first organic light emitting diode 1040A is white light, white light emitted from the second organic light emitting diode 1040B can be converted into red light by the color filter 130. White light emitted from the third organic light emitting diode 1040C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 1040D can be converted into blue light by the color filter 130.

[0162] 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 can be different from each other. The thickness of the first electrode 1041B of the second pixel PX2 can 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, so that the color viewing angle characteristics of the organic light emitting display apparatus 1000 can be improved. Also, 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, so that the brightness viewing angle characteristics of the organic light emitting display apparatus 1000 can be improved.

[0163] Here, when the thickness of the first hole transport layer 211 is to the thickness of the first electrode 1041A is to or to Also, 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 the thickness of the first electrode 1041A is to or to Also, 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

[0164] Meanwhile, although in Figure 4In the embodiment, 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 are decreasing in this order, but the present disclosure is not limited thereto.

[0165] The organic light emitting display apparatus 1000 according to another exemplary embodiment of the present disclosure 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, so that color viewing angle characteristics can be improved. 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, so that luminance viewing angle characteristics can be improved.

[0166] In addition, 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 apparatus 1000 can be formed to have three types of thicknesses for each of the pixels PX1, PX2, PX3, and PX4 by performing a three-time photolithography process. Accordingly, the photolithography process can be minimized, and various thicknesses are also applied to each of the pixels PX1, PX2, PX3, and PX4, so that a more optimized microcavity structure can be implemented.

[0167] Figure 11 is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for 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 apparatus 1100 of Figure 12 The organic light emitting display apparatus 100 of

[0168] Referring to Figure 12The organic light emitting display apparatus 1100 includes a first organic light emitting diode 1140A corresponding to the first pixel PX1, a second organic light emitting diode 1140B corresponding to the second pixel PX2, a third organic light emitting diode 1140C corresponding to the third pixel PX3, and a fourth organic light emitting diode 1140D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, light emitted from the first organic light emitting diode 1140A is white light, white light emitted from the second organic light emitting diode 1140B can be converted into red light by the color filter 130. White light emitted from the third organic light emitting diode 1140C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 1140D can be converted into blue light by the color filter 130.

[0169] 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 can be different from each other. The thickness of the first electrode 1141C of the third pixel PX3 can 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, so that the color viewing angle characteristics of the organic light emitting display apparatus 1100 can be improved. Also, 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, so that the brightness viewing angle characteristics of the organic light emitting display apparatus 1100 can be improved.

[0170] Here, when the thickness of the first hole transport layer 211 is to the thickness of the first electrode 1141A is to or to Also, 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 The thickness of the first electrode 1141A of the first pixel PX1 is to or to Further, the thickness of the first electrode 1141B of the second pixel PX2 is to or to The thickness of the first electrode 1141C of the third pixel PX3 is to or to and the thickness of the first electrode 1141D of the fourth pixel PX4 is to or to

[0171] Meanwhile, although in the above-described embodiment, the thickness of the first electrode 1141A of the first pixel PX1, the thicknesses 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 are decreased in this order, the present disclosure is not limited thereto. Figure 4 According to another exemplary embodiment of the present disclosure, the organic light emitting display apparatus 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, so that color viewing angle characteristics can be improved. Further, 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, so that luminance viewing angle characteristics can be improved.

[0172] Further, 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 apparatus 1100 can be formed to have three types of thicknesses for each of the pixels PX1, PX2, PX3, and PX4 by performing a three-time photolithography process. Accordingly, the photolithography process can be minimized, and various thicknesses are also applied to each of the pixels PX1, PX2, PX3, and PX4, so that a more optimized microcavity structure can be implemented.

[0173]

[0174] Figure 12 ​is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for a 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 apparatus 1200 is substantially the same as the organic light emitting display apparatus 100 of Figure 13 and thus redundant descriptions will be omitted.

[0175] Referring to Figure 13 , the organic light emitting display apparatus 1200 includes a first organic light emitting diode 1240A corresponding to the first pixel PX1, a second organic light emitting diode 1240B corresponding to the second pixel PX2, a third organic light emitting diode 1240C corresponding to the third pixel PX3, and a fourth organic light emitting diode 1240D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, light emitted from the first organic light emitting diode 1240A is white light, white light emitted from the second organic light emitting diode 1240B can be converted into red light by a color filter 130. White light emitted from the third organic light emitting diode 1240C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 1240D can be converted into blue light by the color filter 130.

[0176] A thickness of the first electrode 1241A of the first pixel PX1, a thickness of the first electrode 1241B of the second pixel PX2, and a thickness of the first electrode 1241C of the third pixel PX3 can be different from each other. The thickness of the first electrode 1241A of the first pixel PX1 can be equal to a 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, and thus color viewing angle characteristics of the organic light emitting display apparatus 1200 can be improved. 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, and thus brightness viewing angle characteristics of the organic light emitting display apparatus 1200 can be improved.

[0177] Here, when a thickness of the first hole transport layer 211 is to , a thickness of the first electrode 1241A is to or to In addition, a 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 At that time, the thickness of the first electrode 1241A was to or to Furthermore, 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

[0178] At the same time, despite Figure 4 The image shows the thicknesses of the first electrodes 1241A and 1241D of the first pixel PX1 and the fourth pixel 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 decreasing in that order, but the present disclosure is not limited thereto.

[0179] An organic light-emitting display device 1200 according to another exemplary embodiment of this disclosure 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. Furthermore, the thicknesses of the first electrode 1241B of the second pixel PX2 and the first electrode 1241C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0180] Further, 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 apparatus 1200 can be formed to have three types of thicknesses for each of the pixels PX1, PX2, PX3, and PX4 by performing a three-time photo process. Accordingly, the photo process can be minimized, and various thicknesses are also applied to each of the pixels PX1, PX2, PX3, and PX4, so that a more optimized microcavity structure can be implemented.

[0181] Figure 13 is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for 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 apparatus 1300 of Figure 14 The organic light emitting display apparatus 100 of

[0182] Referring to Figure 14 The organic light emitting display apparatus 1300 includes a first organic light emitting diode 1340A corresponding to the first pixel PX1, a second organic light emitting diode 1340B corresponding to the second pixel PX2, a third organic light emitting diode 1340C corresponding to the third pixel PX3, and a fourth organic light emitting diode 1340D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, 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 can be converted into red light by the color filter 130. The white light emitted from the third organic light emitting diode 1340C can be converted into green light by the color filter 130, and the white light emitted from the fourth organic light emitting diode 1340D can be converted into blue light by the color filter 130.

[0183] 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 can be different from each other. The thickness of the first electrode 1341A of the first pixel PX1 can 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, so that the color viewing angle characteristics of the organic light emitting display apparatus 1300 can be improved. Also, 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, so that the brightness viewing angle characteristics of the organic light emitting display apparatus 1300 can be improved.

[0184] Here, when the thickness of the first hole transport layer 211 is to the thickness of the first electrode 1341A is to or to Also, 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 the thickness of the first electrode 1341A is to or to Also, 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

[0185] Meanwhile, although in Figure 4In the embodiment, the thickness of the first electrode 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 are decreasing in this order, but the present disclosure is not limited thereto.

[0186] The organic light emitting display apparatus 1300 according to another exemplary embodiment of the present disclosure 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, so that color viewing angle characteristics can be improved. 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, so that luminance viewing angle characteristics can be improved.

[0187] In addition, the thickness of the first electrode 1341A of the first pixel PX1 and the thickness of the first electrode 1341C of the third pixel PX3 can be configured to be equal to each other. In addition, 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 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 apparatus 1300 can be formed to have three types of thicknesses for each of the pixels PX1, PX2, PX3, and PX4 by performing a three-time photolithography process. Accordingly, the photolithography process can be minimized, and various thicknesses are also applied to each of the pixels PX1, PX2, PX3, and PX4, so that a more optimized microcavity structure can be implemented.

[0188] Figure 14 is a schematic cross-sectional view of an organic light emitting display apparatus according to another exemplary embodiment of the present disclosure. Except for 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 apparatus 1400 of ​ The organic light emitting display apparatus 100 of

[0189] Referring to ​The organic light emitting display apparatus 1400 includes a first organic light emitting diode 1440A corresponding to the first pixel PX1, a second organic light emitting diode 1440B corresponding to the second pixel PX2, a third organic light emitting diode 1440C corresponding to the third pixel PX3, and a fourth organic light emitting diode 1440D corresponding to the fourth pixel PX4. For example, the first pixel PX1 can be a white pixel, the second pixel PX2 can be a red pixel, the third pixel PX3 can be a green pixel, and the fourth pixel PX4 can be a blue pixel. For example, light emitted from the first organic light emitting diode 1440A is white light, white light emitted from the second organic light emitting diode 1440B can be converted into red light by the color filter 130. White light emitted from the third organic light emitting diode 1440C can be converted into green light by the color filter 130, and white light emitted from the fourth organic light emitting diode 1440D can be converted into blue light by the color filter 130.

[0190] 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 can 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, so that the color viewing angle characteristics of the organic light emitting display apparatus 1400 can be improved. Also, 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, so that the brightness viewing angle characteristics of the organic light emitting display apparatus 1400 can be improved.

[0191] Here, when the thickness of the first hole transport layer 211 is to the thickness of the first electrode 1441A is to or to Also, 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 the thickness of the first electrode 1441A is to or to Furthermore, 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

[0192] At the same time, despite ​ The image shows 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.

[0193] According to another exemplary embodiment of this disclosure, the organic light-emitting display device 1400 configures the thickness of the first electrode 1441A of the first pixel PX1 to be different from the thickness of the first electrode 1441B of the second pixel PX2, thereby improving color viewing angle characteristics. Furthermore, the thicknesses of the first electrode 1441B of the second pixel PX2 and the first electrode 1441C of the third pixel PX3 are configured to be different, thereby improving brightness viewing angle characteristics.

[0194] Furthermore, the thicknesses of the first electrodes 1441A, 1441B, 1441C, and 1441D of the first pixel PX1, second pixel PX2, third pixel PX3, and fourth pixel PX4 can be configured to be different from each other. For example, the thicknesses of the first electrodes 1441A, 1441B, 1441C, and 1441D of each of the first pixel PX1, second pixel PX2, third pixel PX3, and fourth pixel PX4 of the organic light-emitting display device 1400 can be set to be more optimized. Therefore, the effect of the microcavity of the organic light-emitting display device 1400 can be improved.

[0195] Exemplary embodiments of this disclosure can also be described as follows:

[0196] An organic light emitting display apparatus according to an embodiment of the disclosure includes a substrate including a plurality of pixels. The organic light emitting display apparatus also includes a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels. The plurality of pixels includes a first pixel, a second pixel, a third pixel, and a fourth pixel that emit different colors of light. Each of the plurality of organic light emitting diodes includes a first electrode, a light emitting part on the first electrode, and a second electrode on the light emitting part. A thickness of the first electrode of the first pixel is different from a thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from a thickness of the first electrode of the third pixel.

[0197] According to some embodiments of the disclosure, the first pixel can be a white pixel, the second pixel can be a red pixel, the third pixel can be a green pixel, and the fourth pixel can be a blue pixel.

[0198] According to some embodiments of the disclosure, the thickness of the first electrode of the first pixel can be equal to the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the second pixel can be equal to the thickness of the first electrode of the fourth pixel.

[0199] According to some embodiments of the disclosure, 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 can be equal to each other.

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

[0201] According to some embodiments of the disclosure, the thickness of the first electrode of the first pixel can be different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the third pixel can be equal to the thickness of the first electrode of the fourth pixel.

[0202] According to some embodiments of the disclosure, the thickness of the first electrode of the first pixel can be different from the thickness of the first electrode of the third pixel, and the thickness of the first electrode of the first pixel can be equal to the thickness of the first electrode of the fourth pixel.

[0203] According to some embodiments of the disclosure, the thickness of the first electrode of the first pixel can 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 can be different from each other.

[0204] According to some embodiments of the disclosure, the thickness of the first electrode of the first pixel, the second pixel, the third pixel, and the fourth pixel can be different from each other.

[0205] According to some embodiments of the present disclosure, the light emitting part can include a hole transport layer disposed on the first electrode, and a thickness of the hole transport layer can be to

[0206] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to a thickness of the first electrode of the first pixel can be to or to a thickness of the first electrode of the second pixel can be to or to a thickness of the first electrode of the third pixel can be to and a thickness of the first electrode of the fourth pixel can be to or to or to

[0207] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to a thickness of the first electrode of the first pixel can be to or to a thickness of the first electrode of the second pixel can be to or to a thickness of the first electrode of the third pixel can be to or to and a thickness of the first electrode of the fourth pixel can be to or to

[0208] According to some embodiments of the present disclosure, the light emitting part can include a first light emitting part on the first electrode and including a blue light emitting layer, a second light emitting part on the first light emitting part and including a red light emitting layer and two yellow-green light emitting layers, and a third light emitting part on the second light emitting part and including a blue light emitting layer.

[0209] According to some embodiments of the disclosure, the thickness of the first light emitting part can be to The thickness of the second light emitting part can be to The thickness of the third light emitting part can be to The distance between the center of the blue light emitting layer of the first light emitting part and the second electrode can be to The distance between the center of the red light emitting layer of the second light emitting part and the second electrode can be to The distance between the boundary of the two yellow-green light emitting layers of the second light emitting part and the second electrode can be to The distance between the center of the blue light emitting layer of the third light emitting part and the second electrode can be to

[0210] According to some embodiments of the disclosure, the first electrode can include a transparent conductive material, and the second electrode can include a metal material.

[0211] An organic light emitting display apparatus according to another embodiment of the disclosure includes a substrate including a plurality of pixels. The organic light emitting display apparatus further includes a plurality of organic light emitting diodes disposed on the substrate to correspond to the plurality of pixels. The plurality of pixels includes a white pixel, a red pixel, a green pixel, and a blue pixel. Each of the plurality of organic light emitting diodes includes a first electrode, a first light emitting part on the first electrode and including a blue light emitting layer, a second light emitting part on the first light emitting part and including a red light emitting layer and two yellow-green light emitting layers, a third light emitting part on the second light emitting part and including a blue light emitting layer, and a second electrode on the third light emitting part. 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.

[0212] According to some embodiments of the disclosure, the first light emitting part can include a hole transport layer on the first electrode, and the thickness of the hole transport layer is to

[0213] According to some embodiments of the disclosure, when the thickness of the hole transport layer can be to 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

[0214] According to some embodiments of the present disclosure, when the thickness of the hole transport layer can be to 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

[0215] According to another embodiment of the present disclosure, an organic light emitting display apparatus is provided. The organic light emitting display apparatus can include a substrate including a plurality of pixels; and a plurality of organic light emitting diodes disposed on the substrate to respectively correspond to the plurality of pixels, wherein the plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit different colors of light, each of the plurality of pixels has a microcavity structure corresponding to light emitted from the pixel, wherein each of the plurality of organic light emitting diodes includes a first electrode, a light emitting part on the first electrode, and a second electrode on the light emitting part, 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.

[0216] As is apparent from the above description, the present technology can also be implemented as follows.

[0217] Addendum 1. An organic light emitting display apparatus comprising:

[0218] A substrate including a plurality of pixels; and

[0219] A plurality of organic light emitting diodes disposed on the substrate to respectively correspond to the plurality of pixels,

[0220] wherein the plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit different colors of light,

[0221] wherein each of the plurality of organic light emitting diodes includes:

[0222] a first electrode;

[0223] a light emitting portion on the first electrode; and

[0224] a second electrode on the light emitting portion,

[0225] wherein a thickness of the first electrode of the first pixel is different from a thickness of the first electrode of the second pixel, and the thickness of the first electrode of the second pixel is different from a thickness of the first electrode of the third pixel.

[0226] Addendum 2. The organic light emitting display apparatus of Addendum 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.

[0227] Addendum 3. The organic light emitting display apparatus of Addendum 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.

[0228] Addendum 4. The organic light emitting display apparatus of Addendum 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.

[0229] Addendum 5. The organic light emitting display apparatus of Addendum 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.

[0230] Addendum 6. The organic light emitting display apparatus of Addendum 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.

[0231] Para 7. The organic light emitting display apparatus according to Para 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.

[0232] Para 8. The organic light emitting display apparatus according to Para 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.

[0233] Para 9. The organic light emitting display apparatus according to Para 2, wherein the thickness of the first electrode of the first pixel, the second pixel, the third pixel, and the fourth pixel are different from each other.

[0234] Para 10. The organic light emitting display apparatus according to Para 2, wherein the light emitting part includes a hole transport layer disposed on the first electrode, and the thickness of the hole transport layer is to

[0235] Para 11. The organic light emitting display apparatus according to Para 10, wherein when the thickness of the hole transport layer is to 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

[0236] Para 12. The organic light emitting display apparatus according to Para 10, wherein when the thickness of the hole transport layer is to the thickness of the first electrode of the first pixel is to or to a thickness of the first electrode of the second pixel is to or to a thickness of the first electrode of the third pixel is to or to and a thickness of the first electrode of the fourth pixel is to or to

[0237] Paragraph 13. The organic light emitting display apparatus of paragraph 2, wherein the light emitting part comprises:

[0238] a first light emitting part on the first electrode and comprising a blue light emitting layer;

[0239] a second light emitting part on the first light emitting part and comprising a red light emitting layer and two yellow-green light emitting layers; and

[0240] a third light emitting part on the second light emitting part and comprising a blue light emitting layer.

[0241] Paragraph 14. The organic light emitting display apparatus of paragraph 13, wherein a thickness of the first light emitting part is to a thickness of the second light emitting part is to a thickness of the third light emitting part is to a distance between a center of the blue light emitting layer of the first light emitting part and the second electrode is to a distance between a center of the red light emitting layer of the second light emitting part and the second electrode is to a distance between a boundary of the two yellow-green light emitting layers of the second light emitting part and the second electrode is to and a distance between a center of the blue light emitting layer of the third light emitting part and the second electrode is to

[0242] Paragraph 15. The organic light emitting display apparatus of paragraph 1, wherein the first electrode comprises a transparent conductive material and the second electrode comprises a metal material.

[0243] Paragraph 16. An organic light emitting display apparatus comprising:

[0244] a substrate including a plurality of pixels; and

[0245] a plurality of organic light emitting diodes on the substrate corresponding to the plurality of pixels, respectively,

[0246] wherein the plurality of pixels includes a white pixel, a red pixel, a green pixel, and a blue pixel,

[0247] each of the plurality of organic light emitting diodes includes:

[0248] a first electrode;

[0249] a first light emitting part on the first electrode and including a blue light emitting layer;

[0250] a second light emitting part on the first light emitting part and including a red light emitting layer and two yellow-green light emitting layers;

[0251] a third light emitting part on the second light emitting part and including a blue light emitting layer; and

[0252] a second electrode on the third light emitting part,

[0253] wherein a thickness of the first electrode of the white pixel is different from a thickness of the first electrode of the red pixel, and the thickness of the first electrode of the red pixel is different from a thickness of the first electrode of the green pixel.

[0254] Paragraph 17. The organic light emitting display apparatus of paragraph 16, wherein the first light emitting part includes a hole transport layer on the first electrode, and a thickness of the hole transport layer is to

[0255] Paragraph 18. The organic light emitting display apparatus of paragraph 17, wherein when the thickness of the hole transport layer is to , a thickness of the first electrode of the white pixel is to or to a thickness of the first electrode of the red pixel is to or to a thickness of the first electrode of the green pixel is to and a thickness of the first electrode of the blue pixel is to or to or to

[0256] Para 19. The organic light emitting display apparatus of Para 17, wherein, when a thickness of the hole transport layer is to a thickness of the first electrode of the white pixel is to or to a thickness of the first electrode of the red pixel is to or to a thickness of the first electrode of the green pixel is to or to and a thickness of the first electrode of the blue pixel is to or to

[0257] Para 20. An organic light emitting display apparatus comprising:

[0258] a substrate including a plurality of pixels; and

[0259] a plurality of organic light emitting diodes disposed on the substrate to respectively correspond to the plurality of pixels,

[0260] wherein the plurality of pixels include a first pixel, a second pixel, a third pixel, and a fourth pixel, and emit different colors of light, each of the plurality of pixels having a microcavity structure corresponding to light emitted from the pixel,

[0261] wherein each of the plurality of organic light emitting diodes includes:

[0262] a first electrode;

[0263] a light emitting part on the first electrode; and

[0264] a second electrode on the light emitting part,

[0265] 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.

[0266] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed disclosure without departing from the spirit or scope of the disclosure. Thus, it is intended that the disclosure cover the modifications and variations of the disclosure provided they come within the scope of the appended claims and their equivalents.

Claims

1. An organic light-emitting display device, comprising: The first substrate includes multiple pixels; A plurality of organic light-emitting diodes are disposed on the first substrate to correspond to the plurality of pixels respectively; An encapsulation layer disposed on the plurality of organic light-emitting diodes, wherein the encapsulation layer comprises at least one inorganic layer and at least one organic layer; An adhesive member disposed on the encapsulation layer; and The second substrate disposed on the adhesive member The plurality of pixels includes at least a first pixel, a second pixel, and a third pixel, and emits light of different colors. Each of the plurality of organic light-emitting diodes includes: First electrode; The light-emitting part on the first electrode; and The second electrode on the light-emitting part The light-emitting part includes: A first light-emitting part is located on the first electrode and includes a first light-emitting layer; A second light-emitting part, which is located on the first light-emitting part; and A third light-emitting part is located on top of the second light-emitting part, and at least one of the first light-emitting part, the second light-emitting part, and the third light-emitting part is configured to emit blue light. The first light-emitting part, the second light-emitting part, and the third light-emitting part include a charge generation layer. The first light-emitting part includes a hole transport layer disposed on the first electrode, and the thickness of the hole transport layer is [missing information]. to 2. The organic light-emitting display device according to claim 1, wherein, The thickness of the first light-emitting part is to The thickness of the second light-emitting part is to The thickness of the third light-emitting part is to 3. The organic light-emitting display device according to claim 1 or 2, wherein, The first pixel is a white pixel, the second pixel is a red pixel, and the third pixel is a green pixel.

4. The organic light-emitting display device according to claim 3, 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.

5. The organic light-emitting display device according to claim 1, wherein, The first light-emitting layer is a fluorescent emitting layer.

6. The organic light-emitting display device according to claim 1, wherein, The second light-emitting part is a phosphorescent emitting part.

7. The organic light-emitting display device according to claim 1, wherein, The second light-emitting part emits red light and yellow-green light.

8. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth pixel, and the fourth pixel is a blue pixel. 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.

9. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth 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.

10. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth 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 The thickness of the first electrode of the second pixel is equal to the thickness of the first electrode of the fourth pixel.

11. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth 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 The thickness of the first electrode of the third pixel is equal to the thickness of the first electrode of the fourth pixel.

12. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth 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 The thickness of the first electrode of the first pixel is equal to the thickness of the first electrode of the fourth pixel.

13. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth pixel, and the fourth pixel is a blue pixel. 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.

14. The organic light-emitting display device according to claim 4, wherein, The plurality of pixels also includes a fourth pixel, and the fourth pixel is a blue pixel. The thicknesses of the first electrodes of the first pixel, the second pixel, the third pixel, and the fourth pixel are different from each other.

15. The organic light-emitting display device according to claim 3, wherein, The plurality of pixels also includes a fourth pixel, and the fourth pixel is a blue pixel. When the thickness of the hole transport layer is to At that time, 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 16. The organic light-emitting display device according to claim 3, wherein, The plurality of pixels also includes a fourth pixel, and the fourth pixel is a blue pixel. When the thickness of the hole transport layer is to At that time, 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 17. The organic light-emitting display device according to claim 1 or 2, wherein, The second light-emitting part includes a red light-emitting layer and two yellow-green light-emitting layers, and The third light-emitting part includes a blue light-emitting layer.

18. The organic light-emitting display device according to claim 17, wherein, The distance between the center of the first light-emitting layer of the first light-emitting part and the second electrode is to The distance between the center of the red light-emitting layer of the second light-emitting part and the second electrode is to The distance between the boundary of the two yellow-green light-emitting layers of the second light-emitting part and the second electrode is to And the distance between the center of the blue light-emitting layer of the third light-emitting part and the second electrode is to 19. The organic light-emitting display device according to claim 1, wherein, The first electrode comprises a transparent conductive material, and the second electrode comprises a metallic material.

20. The organic light-emitting display device according to claim 1, wherein, Excluding the thickness of the first light-emitting part of the hole transport layer, to 21. An organic light-emitting display device, comprising: The first substrate includes multiple pixels; A plurality of organic light-emitting diodes are disposed on the first substrate to correspond to the plurality of pixels respectively; An encapsulation layer disposed on the plurality of organic light-emitting diodes, wherein the encapsulation layer comprises at least one inorganic layer and at least one organic layer; An adhesive member disposed on the encapsulation layer; and The second substrate disposed on the adhesive member The plurality of pixels includes at least a first pixel, a second pixel, and a third pixel, and emits light of different colors. Each of the plurality of organic light-emitting diodes includes: First electrode; The light-emitting part on the first electrode; and The second electrode on the light-emitting part The light-emitting part includes: A first light-emitting part is located on the first electrode and includes a first light-emitting layer; A second light-emitting part, which is located on the first light-emitting part; and A third light-emitting part is located on top of the second light-emitting part, and at least one of the first light-emitting part, the second light-emitting part, and the third light-emitting part is configured to emit blue light. The first light-emitting part, the second light-emitting part, and the third light-emitting part include a charge generation layer. Wherein, the thickness of the second light-emitting part is to 22. The organic light-emitting display device according to claim 21, wherein, The thickness of the first light-emitting part is to And the thickness of the third light-emitting part is to 23. The organic light-emitting display device according to claim 21, wherein, The first light-emitting portion includes a hole transport layer disposed on the first electrode, and the thickness of the hole transport layer is [missing information]. to

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