Organic light-emitting display device

Abstract

This organic light-emitting display device may include a plurality of pixels on a substrate. Each of the plurality of pixels may include a first sub-pixel, a second sub-pixel, and a third sub-pixel, which have a three-dimensional structure. The second sub-pixel may be arranged to horizontally overlap the first sub-pixel, and the third sub-pixel may be arranged to vertically overlap the first sub-pixel and the second sub-pixel. The first sub-pixel may include a first organic light-emitting element, the second sub-pixel may include a second organic light-emitting element, and the third sub-pixel may include a third organic light-emitting element.

Description

organic light emitting display device

[0001] The embodiment relates to an organic light emitting display device.

[0002] Recently, as society enters the full-fledged information age, interest in information displays capable of processing and displaying massive amounts of information has been growing. Furthermore, the growing demand for portable information media has driven rapid development in the display industry. In response, a variety of lightweight and thin flat panel display devices are gaining traction.

[0003] Among these flat panel displays, organic light-emitting diodes (OLEDs) are gaining traction. OLEDs are being actively developed for use in head-mounted displays (HMDs), which are mounted close to the human eye. HMDs can be worn as helmets or glasses, enabling virtual reality (VR) or augmented reality (AR).

[0004] HMDs are equipped with small, high-resolution OLEDs. These small, high-resolution OLEDs are formed using wafer-based semiconductor processes, with organic light-emitting elements positioned on a driving circuit. Meanwhile, glasses-type HMDs require brighter, clearer images on very small screens. To achieve this, the amount of light from the OLEDs and their extraction efficiency must be maximized. Furthermore, light leakage between pixels (P) must be suppressed to enhance image quality. Technology for enhancing light extraction efficiency, applicable to ultra-high resolutions, is expected to find widespread application in large-screen display industries such as mobile and IT devices.

[0005] Meanwhile, a fine metal mask (FMM) is conventionally used as a deposition pattern mask to deposit an organic light-emitting layer constituting an organic light-emitting element for each subpixel.

[0006] However, when manufacturing high-definition (e.g., 500 PPI or higher) displays or large-area (e.g., 8th generation or higher) displays, it is quite difficult to form an organic light-emitting layer for each subpixel using FMM. Furthermore, when using FMM, there is a limit to further increasing the high-definition. Furthermore, when using FMM, there are problems such as reduced yield and increased manufacturing costs. In addition, when using FMM, there is a problem of reduced product life due to difficulty in optimizing deposition.

[0007] Meanwhile, as display resolutions have increased in recent years, pixel resolution (ppi) has also increased, resulting in increasingly narrow gaps between pixels (or subpixels). Furthermore, as the efficiency of light-emitting materials for organic light-emitting devices has increased, they can now produce high brightness with low current and voltage, resulting in lower power consumption.

[0008] However, displays with higher resolutions still suffer from a low lifetime luminous efficacy. Here, lifetime luminous efficacy can be defined as the ratio of lifetime or brightness to the luminous area ratio. For example, an increase in the luminous area ratio can result in increased brightness for the same lifetime, increased lifetime for the same brightness, or both increased lifetime and brightness.

[0009] The present invention aims to solve the above-mentioned and other problems.

[0010] Another object of the embodiment is to provide a high-definition and high-resolution organic light-emitting display device.

[0011] Another object of the present invention is to provide an organic light emitting display device that does not use FMM.

[0012] Another object of the present invention is to provide an organic light-emitting display device capable of improving image quality.

[0013] The technical problems of the embodiment are not limited to those described in this article, but include those that can be understood through the description of the invention.

[0014] According to one aspect of the embodiment to achieve the above or other purposes, an organic light-emitting display device includes a plurality of pixels on a substrate, the plurality of pixels each including a first subpixel, a second subpixel, and a third subpixel having a three-dimensional structure, the second subpixel being arranged to horizontally overlap the first subpixel, the third subpixel being arranged to vertically overlap the first subpixel and the second subpixel, the first subpixel including a first organic light-emitting element, the second subpixel including a second organic light-emitting element, and the third subpixel including a third organic light-emitting element.

[0015] The size of the above pixel may be the same as the size of the third subpixel.

[0016] The size of the above pixel may be equal to the sum of the size of the first subpixel and the size of the second subpixel.

[0017] The second organic light-emitting element may be arranged to overlap horizontally with the first organic light-emitting element, and the third organic light-emitting element may be arranged to overlap vertically with the first organic light-emitting element and the second organic light-emitting element.

[0018] The first organic light-emitting element, the second organic light-emitting element, and the third organic light-emitting element each include an anode electrode, an organic light-emitting layer, and a cathode electrode, and the anode electrode may be independently disposed in the first subpixel, the second subpixel, and the third subpixel, and the cathode electrode may be commonly disposed in the first subpixel and the second subpixel.

[0019] The first subpixel, the second subpixel, and the third subpixel each include a light-emitting region and a non-light-emitting region, and the light-emitting region may have a size corresponding to the anode electrode.

[0020] The third anode electrode of the third organic light-emitting element may vertically overlap the first anode electrode of the first organic light-emitting element and the second anode electrode of the second organic light-emitting element.

[0021] The size of the third anode electrode of the third organic light-emitting element may be larger than the size of the first anode electrode of the first organic light-emitting element or the size of the second anode electrode of the second organic light-emitting element.

[0022] The third subpixel may be disposed on the first subpixel and the second subpixel.

[0023] The first anode electrode of the first organic light-emitting device and the second anode electrode of the second organic light-emitting device may include a reflective metal, and the first cathode electrode of the first organic light-emitting device and the second cathode electrode of the second organic light-emitting device may include a transparent or translucent conductive film. The third anode electrode of the third organic light-emitting device may include a transparent conductive film, and the third cathode electrode of the third organic light-emitting device may include a transparent or translucent conductive film.

[0024] The third subpixel may be positioned below the first subpixel and the second subpixel.

[0025] The third anode electrode of the third organic light-emitting element may include a reflective metal, and the third cathode electrode of the third organic light-emitting element may include a transparent or translucent conductive film. The first anode electrode of the first organic light-emitting element and the second anode electrode of the second organic light-emitting element may include a transparent conductive film,

[0026] The first cathode electrode of the first organic light-emitting element and the second cathode electrode of the second organic light-emitting element may include a transparent or translucent conductive film.

[0027] The organic light-emitting display device may further include a plurality of insulating layers between the first organic light-emitting element, the second organic light-emitting element, and the third organic light-emitting element. The plurality of insulating layers may include at least one organic insulating layer and at least one inorganic insulating layer.

[0028] Among the above multiple insulating layers, the lowest and uppermost layers may be inorganic insulating layers.

[0029] The organic light emitting display device may further include a plurality of first banks between the plurality of first subpixels and the plurality of second subpixels; and a plurality of second banks between the plurality of third subpixels.

[0030] The second distance between the plurality of second banks may be greater than the first distance between the plurality of first banks.

[0031] The second distance between the plurality of second banks may be equal to the width of the pixel or the width of the third subpixel.

[0032] One of the first organic light-emitting element and the second organic light-emitting element may include a red organic light-emitting element, the other may include a green organic light-emitting element, and the third organic light-emitting element may include a blue organic light-emitting element.

[0033] The effects of the organic light-emitting display device according to the embodiment are described as follows.

[0034] According to at least one of the embodiments, the first subpixel, the second subpixel, and the third subpixel are arranged three-dimensionally to form a pixel, thereby having the advantage that the size of the pixel can be further reduced, thereby enabling a high-definition, ultra-high-resolution display to be implemented.

[0035] According to at least one of the embodiments, the first subpixel, the second subpixel, and the third subpixel constituting the pixel are arranged three-dimensionally so that the size of the blue subpixel increases to the size of the pixel, thereby greatly increasing the light-emitting area and improving the lifetime light-emitting rate.

[0036] According to at least one of the embodiments, since the organic light-emitting material forming the third organic light-emitting layer is deposited over the entire area of ​​the substrate, there is an advantage in that the degree of process freedom is increased and the yield can be improved because a separate mask is not required.

[0037] According to at least one of the embodiments, the first subpixel, the second subpixel, and the third subpixel are arranged three-dimensionally to form a pixel, and the anode electrode and the cathode electrode of each of the first organic light-emitting element, the second organic light-emitting element, and the third organic light-emitting element are formed of a reflective electrode, a transparent or translucent conductive film, or the like, so that recycling of the first color light, the second color light, and the third color light can be performed between these electrodes, thereby improving the light extraction efficiency.

[0038] Further scope of applicability of the embodiments will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the embodiments will be readily apparent to those skilled in the art, it should be understood that the detailed description and specific embodiments, such as preferred embodiments, are given by way of example only.

[0039] Fig. 1 is a plan view illustrating an organic light-emitting display device according to an embodiment.

[0040] FIG. 2 is a cross-sectional view illustrating an organic light-emitting display device according to the first embodiment.

[0041] Figures 3a and 3b illustrate how the cathode electrode of each organic light-emitting element is connected to a power line.

[0042] FIG. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment.

[0043] The sizes, shapes, and dimensions of components depicted in the drawings may differ from the actual components. Furthermore, even if the same components are depicted with different sizes, shapes, and dimensions across drawings, this is merely an example within the drawings, and the same components may have the same sizes, shapes, and dimensions across drawings.

[0044] Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes 'module' and 'part' used for components in the following description are given or used interchangeably in consideration of the ease of writing the specification, and do not have distinct meanings or roles in themselves. In addition, the attached drawings are intended to make it easier to understand the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the attached drawings. In addition, when an element such as a layer, region, or substrate is referred to as existing 'on' another element, this includes that it may be directly on the other element or that other intermediate elements may exist therebetween.

[0045]

[0046] Although the following description is limited to a top-emitting display, the embodiments can also be applied to a bottom-emitting display. A top-emitting organic light-emitting display device can display an image by emitting light upward, i.e., forward. A bottom-emitting organic light-emitting display device can display an image by emitting light downward, i.e., backward.

[0047] Fig. 1 is a plan view illustrating an organic light-emitting display device according to an embodiment.

[0048] Referring to FIG. 1, an organic light-emitting display device according to an embodiment may include a plurality of pixels (P) arranged on a substrate (100).

[0049] The substrate (100) may include a display area and a non-display area surrounding the display area. A plurality of pixels (P) may be arranged on the display area. A driving device such as a gate driver, a data driver, etc. may be arranged in the non-display area, but is not limited thereto. The plurality of pixels (P) may be arranged along a first direction (X). The plurality of pixels (P) may be arranged along a second direction (Y). The plurality of pixels (P) may be arranged in a matrix. The first direction (X) may be a horizontal direction or a lateral direction, and the second direction (Y) may be a vertical direction or a longitudinal direction.

[0050] Each pixel (P) may include multiple subpixels (SPr, SPg, SPb). Each pixel (P) may include subpixels (SPr, SPg, SPb) of at least three different colors. Although not shown, the pixel (P) may further include a transparent area without color to implement a transparent display.

[0051] Each pixel (P) may include a first subpixel (SPr), a second subpixel (SPb), and a third subpixel (SPb). In this case, the first subpixel (SPr) may be a red subpixel, the second subpixel (SPg) may be a green subpixel, and the third subpixel (SPb) may be a blue subpixel.

[0052] As a first example, the plurality of subpixels (SPr, SPg, SPb) may be separated into one or more pixel (P) units or row-line units along the second direction (Y). For example, the first subpixel (SPr) may be separated into one or more pixel (P) units or row-line units along the second direction (Y), the second subpixel (SPg) may be separated into one or more pixel (P) units or row-line units along the second direction (Y), and the third subpixel (SPb) may be separated into one or more pixel (P) units or row-line units along the second direction (Y).

[0053] As a second example, the plurality of subpixels (SPr, SPg, SPb) may be arranged in a stripe shape along the second direction (Y). In the stripe shape structure, the plurality of subpixels (SPr, SPg, SPb) may be arranged continuously without being separated along the second direction (Y). For example, the second subpixel (SPg) may be arranged continuously along the second direction (Y), the first subpixel (SPr) may be arranged continuously along the second direction (Y), and the third subpixel (SPb) may be arranged continuously along the second direction (Y).

[0054] Meanwhile, in the first and second examples, the second subpixel (SPg), the first subpixel (SPr), and the blue subpixel (SPb) may be alternately arranged in units of columns along the first direction (X). That is, in the embodiment, the second subpixel (SPg), the first subpixel (SPr), and the blue subpixel (SPb) having different colors may be arranged in a side-by-side structure along the first direction (X). In the side-by-side structure, it is very important to implement high definition and high resolution without reducing the light-emitting area of ​​each of the plurality of subpixels (SPr, SPg, SPb).

[0055] Meanwhile, as illustrated in FIG. 1, in the embodiment, a plurality of pixels (P) may include a first subpixel (SPr), a second subpixel (SPg), and a third subpixel (SPb), each having a three-dimensional structure. That is, the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) may be arranged three-dimensionally to form a pixel (P). That is, the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) may be arranged not only horizontally but also vertically with respect to one another, thereby forming a pixel (P).

[0056] For example, the sum of the size (or area) of the first subpixel (SPr) and the size (or area) of the second subpixel may be equal to the size (or area) of the pixel (P). For example, the sum of the width of the first subpixel (SPr) and the width of the second subpixel (SPg) may be equal to the width (W) of the pixel (P).

[0057] For example, the size (or area) of the third subpixel (SPb) may be the same as the size (or area) of the pixel (P). For example, the width of the third subpixel (SPb) may be the same as the width (W) of the pixel (P).

[0058] In this case, the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) can be arranged three-dimensionally so that the pixel (P) includes all of the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb). Understanding this, the second subpixel (SPg) can be arranged to horizontally overlap the first subpixel (SPr), and the third subpixel (SPb) can be arranged to vertically overlap the first subpixel (SPr) and the second subpixel (SPg).

[0059] A plurality of first subpixels (SPr) and a plurality of second subpixels (SPg) may be arranged alternately along a first direction (X). A plurality of third subpixels (SPb) may be arranged in units of pixels (P) along the first direction (X).

[0060] The first subpixel (SPr) can emit first color light, the second subpixel (SPg) can emit second color light, and the third subpixel (SPb) can emit third color light. Accordingly, a full-color image can be displayed for each unit pixel (P) by the first color light, the second color light, and the third color light. For example, the first color light can be red light, the second color light can be green light, and the third color light can be blue light, but this is not limited thereto.

[0061] According to an embodiment, a first subpixel (SPr), a second subpixel (SPg), and a third subpixel (SPb) are arranged three-dimensionally to form a pixel (P), so that the size of the pixel (P) can be further reduced, thereby implementing a high-definition, ultra-high-resolution display.

[0062] Meanwhile, as illustrated in FIG. 1, the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) may each include an emitting area (EAr, EAg, EAb) and a non-emitting area. The emitting area (EAr, EAg, EAb) is an area from which the corresponding color light is emitted, and as the emitting area (EAr, EAg, EAb) becomes wider, the lifetime luminous efficiency may increase. The non-emitting area may be an area remaining in each of the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) excluding the emitting area (EAr, EAg, EAb).

[0063] As illustrated in FIG. 1, the third light-emitting area (EAb) of the third subpixel (SPb) may be arranged to vertically overlap the first light-emitting area (EAr) of the first subpixel (SPr). The third light-emitting area (EAb) of the third subpixel (SPb) may vertically overlap the second light-emitting area (EAg) of the second subpixel (SPg). The first light-emitting area (EAr) of the first subpixel (SPr) and the second light-emitting area (EAg) of the second subpixel (SPg) may not vertically overlap. That is, the first light-emitting area (EAr) of the first subpixel (SPr) and the second light-emitting area (EAg) of the second subpixel (SPg) may be arranged to horizontally overlap.

[0064] The size of the third light-emitting area (EAb) of the third subpixel (SPb) may be larger than the size of the first light-emitting area (EAr) of the first subpixel (SPr). The size of the third light-emitting area (EAb) of the third subpixel (SPb) may be larger than the size of the second light-emitting area (EAg) of the second subpixel (SPg). Although the size of the first light-emitting area (EAr) and the size of the second light-emitting area (EAg) are shown as being the same in the drawing, they may be different from each other.

[0065] According to an embodiment, the size of the third light-emitting area (EAb) of the third subpixel (SPb) is increased to the size of the pixel (P), so that the third light-emitting area (EAb) is greatly increased, and the lifetime light-emitting rate can be improved.

[0066]

[0067] Fig. 2 is a cross-sectional view illustrating an organic light-emitting display device according to a first embodiment. Fig. 2 is a cross-sectional view taken along line AA' of the organic light-emitting display device of Fig. 1.

[0068] Referring to FIGS. 1 and 2, it may include a substrate (100), a plurality of driving circuits (101r, 101g, 101b), a protective layer (110), a plurality of banks (120, 125), a plurality of organic light-emitting elements (140r, 140g, 140b), a plurality of insulating layers (150 to 152, 160), etc.

[0069] A plurality of pixels (P) may be arranged on a substrate (100). The plurality of pixels (P) may each include a first subpixel (SPr), a second subpixel (SPg), and a third subpixel (SPb) having a three-dimensional structure.

[0070] As described above, in order to implement a high-definition, ultra-high-resolution display, the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) may be arranged three-dimensionally. The third subpixel (SPb) may be arranged on the first subpixel (SPr) and may vertically overlap with the first subpixel (SPr). The third subpixel (SPb) may be arranged on the second subpixel (SPg) and may vertically overlap with the second subpixel (SPg).

[0071] A plurality of driving circuits (101r, 101g, 101b) may be arranged on a substrate (100), and a protective layer (110) may be arranged on the plurality of driving circuits (101r, 101g, 101b).

[0072] The substrate (100) may be a substrate (100) having characteristics such as rigid, flexible, foldable, and rollable. The substrate (100) may be made of a silicon wafer, glass, plastic, ceramic, or the like. The substrate (100) may be made of a transparent material or an opaque material.

[0073] The plurality of driving circuits (101r, 101g, 101b) may include a first driving circuit (101r), a second driving circuit (101g), and a third driving circuit (101b). The first driving circuit (101r) may be connected to the first subpixel (SPr) and may drive the first subpixel (SPr) to emit a first color light. The second driving circuit (101g) may be connected to the second subpixel (SPg) and may drive the second subpixel (SPg) to emit a second color light. The third driving circuit (101b) may be connected to the third subpixel (SPb) and may drive the third subpixel (SPb) to emit a third color light.

[0074] Each driving circuit may include a plurality of transistors and at least one capacitor. One of the plurality of transistors may be a driving transistor.

[0075] A protective layer (110) may be placed on a plurality of driving circuits (101r, 101g, 101b) to protect the plurality of driving circuits (101r, 101g, 101b). The protective layer (110) may be a planarizing layer to ensure that layers are stably formed thereon.

[0076] The protective layer (110) may be a single layer composed of an inorganic film or an organic film. The protective layer (110) may be a combination of multiple layers of inorganic films or multiple layers of inorganic films and multiple layers of organic films. The protective layer (110) may be formed of a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multilayer thereof.

[0077] For example, the protective layer (110) may be composed of a multi-structure of an organic film and an inorganic film. In this case, the organic film may include an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, etc. The inorganic film may include a silicon oxide film (SiOx), a silicon nitride film (SiNx), etc.

[0078] The plurality of banks (120, 125) may include a plurality of first banks (120), a plurality of second banks (125), etc. The plurality of first banks (120) may be disposed on the protective layer (110) between the plurality of first subpixels (SPr) and the plurality of subpixels (SPr, SPg, SPb). The plurality of second banks (125) may be disposed on the second inorganic insulating layer (151), which is the uppermost layer among the plurality of insulating layers (150, 160, 151), between the plurality of third subpixels (SPb). The first bank (120) may serve to distinguish the first subpixel (SPr) and the second subpixel (SPg), and the second bank (125) may serve to distinguish the adjacent third subpixel (SPb).

[0079] In the drawing, the thickness, size, shape, etc. of the first bank (120) and the second bank (125) are depicted to be different from each other, and the thickness, size, shape, etc. may be changed.

[0080] The first bank (120) and / or the second bank (125) may include an inorganic material or an organic material. For example, the first bank (120) and / or the second bank (125) may include an inorganic material such as SiNx, SiON, etc.

[0081] Among the plurality of first banks (120), some banks may vertically overlap with the second bank (125), but others may not vertically overlap with the second bank (125).

[0082] This may be due to the difference between the first distance (d1) between the plurality of first banks (120) and the second distance (d2) between the plurality of second banks (125). As illustrated in FIG. 2, the second distance (d2) between the plurality of second banks (125) may be greater than the first distance (d1) between the plurality of first banks (120). In addition, as illustrated in FIGS. 1 and 2, the second distance (d2) between the plurality of second banks (125) may be equal to the width (W) of the pixel (P) or the width of the third subpixel (SPb).

[0083] Meanwhile, the plurality of organic light-emitting elements (140r, 140g, 140b) may include a first organic light-emitting element (140r), a second organic light-emitting element (140g), and a third organic light-emitting element (140b).

[0084] The first organic light-emitting element (140r) may be placed in the first subpixel (SPr), the second organic light-emitting element (140g) may be placed in the second subpixel (SPg), and the third organic light-emitting element (140b) may be placed in the third subpixel (SPb).

[0085] As described above, since the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) are arranged three-dimensionally, the first organic light-emitting element (140r), the second organic light-emitting element (140g), and the third organic light-emitting element (140b) can also be arranged three-dimensionally.

[0086] The third organic light-emitting element (140b) may be placed on the upper side of the first organic light-emitting element (140r). The third organic light-emitting element (140b) may be placed on the upper side of the second organic light-emitting element (140g).

[0087] The second organic light-emitting element (140g) may be arranged to overlap horizontally with the first organic light-emitting element (140r). The third organic light-emitting element (140b) may be arranged to overlap vertically with the first organic light-emitting element (140r) and the second organic light-emitting element (140g).

[0088] The first organic light-emitting element (140r) and the second organic light-emitting element (140g) may be disposed on the protective layer (110), and the third organic light-emitting element (140b) may be disposed on the second inorganic insulating layer (151).

[0089] One of the first organic light-emitting element (140r) and the second organic light-emitting element (140g) may include a red organic light-emitting element, and the other may include a green organic light-emitting element. The third organic light-emitting element (140b) may include a blue organic light-emitting element.

[0090] In the top emission method, the first color light, the second color light, and the third color light generated from each of the first organic light-emitting element (140r), the second organic light-emitting element (140g), and the third organic light-emitting element (140b) can be emitted forward through the third inorganic insulating layer (152). For example, the first color light can be red light, the second color light can be green light, and the third color light can be blue light, but this is not limited thereto.

[0091] In the bottom emission method, the first color light, the second color light, and the third color light generated from each of the first organic light-emitting element (140r), the second organic light-emitting element (140g), and the third organic light-emitting element (140b) can be emitted backward through the substrate (100).

[0092] Meanwhile, the first organic light-emitting element (140r) may include a first anode electrode (141r), a first organic light-emitting layer (142r), a first cathode electrode (143r), etc. The second organic light-emitting element (140g) may include a second anode electrode (141g), a second organic light-emitting layer (142g), a second cathode electrode (143g), etc. The third organic light-emitting element (140b) may include a third anode electrode (141b), a third organic light-emitting layer (142b), a third cathode electrode (143b), etc. The first organic light-emitting layer (142r) can generate a first color light using power between the first anode electrode (141r) and the first cathode electrode (143r), the second organic light-emitting layer (142g) can generate a second color light using power between the second anode electrode (141g) and the second cathode electrode (143g), and the third organic light-emitting layer (142b) can generate a third color light using power between the third anode electrode (141b) and the third cathode electrode (143b).

[0093] The first anode electrode (141r), the second anode electrode (141g), and the third anode electrode (141b) can be independently disposed in the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb). That is, the first anode electrode (141r) can be disposed only in the first subpixel (SPr), the second anode electrode (141g) can be disposed only in the second subpixel (SPg), and the third anode electrode (141b) can be disposed only in the third subpixel (SPb).

[0094] As an example, a conductive material may be formed and patterned on a substrate (100), so that a first anode electrode (141r), a second anode electrode (141g), and a third anode electrode (141b) may be independently formed in each of the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb).

[0095] A plurality of first anode electrodes (141r) and a plurality of second anode electrodes (141g) may be arranged to be spaced apart from each other with a plurality of first banks (120) therebetween. A plurality of third anode electrodes (141b) may be arranged to be spaced apart from each other with a plurality of second banks (125) therebetween.

[0096] The first anode electrode (141r) can be electrically connected to the first driving circuit (101r). Since the first anode electrode (141r) and the first driving circuit (101r) are arranged with the protective layer (110) interposed therebetween, the first anode electrode (141r) can be electrically connected to the first driving circuit (101r) through the protective layer (110).

[0097] The second anode electrode (141g) can be electrically connected to the second driving circuit (101g). Since the second anode electrode (141g) and the second driving circuit (101g) are arranged with a protective layer (110) therebetween, the second anode electrode (141g) can be electrically connected to the second driving circuit (101g) through the protective layer (110).

[0098] The third anode electrode (141b) may be electrically connected to the third driving circuit (101b) through a connection portion (190 in FIG. 1). The third anode electrode (141b) may be electrically connected to the third driving circuit (101b) in a non-emission region between the first subpixel (SPr) and the second subpixel (SPg) or in a non-emission region between adjacent pixels (P). For example, the third anode electrode (141b) may be electrically connected to the third driving circuit (101b) through a plurality of insulating layers (150, 160, 151), the first bank (120), and the protective layer (110).

[0099] For example, the third driving circuit (101b) may be arranged to extend from the third subpixel (SPb) to the area between the third subpixels (SPb). For example, the third anode electrode (141b) may be arranged to extend from the third subpixel (SPb) to the area between the third subpixels (SPb). As illustrated in FIG. 1, the connecting portion (190) may be arranged between the third subpixels (SPb) in the second direction (Y). In this case, the connecting portion (190) may be arranged vertically between the extended third driving circuit (101b) and the extended third anode electrode (141b). The lower side of the connecting portion (190) may be electrically connected to the extended third driving circuit (101b), and the upper side of the connecting portion (190) may be electrically connected to the extended third anode electrode (141b).

[0100] When the first cathode electrode (143r) and the second cathode electrode (143g) are arranged on the entire area of ​​the substrate (100) as an integrated cathode electrode, when the connecting electrode between the third anode electrode (141b) and the third driving circuit (101b) penetrates through the plurality of insulating layers (150, 160, 151), the first bank (120), and the protective layer (110), an electrical short may occur between the connecting electrode and the first cathode electrode (143r) and the second cathode electrode (143g). To prevent this, a through hole may be formed in the integrated cathode electrode so as to be physically separated from the connecting electrode. In addition, an insulating layer may be formed between the connecting electrode and the integrated cathode electrode in the through hole of the integrated cathode electrode, but is not limited thereto.

[0101] Meanwhile, as illustrated in FIG. 1, each of the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) may include an emission area (EAr, EAg, EAb) and a non-emission area. In this case, the first emission area (EAr) of the first subpixel (SPr) may have a size corresponding to the first anode electrode (141r). The second emission area (EAg) of the second subpixel (SPg) may have a size corresponding to the second anode electrode (141g). The third emission area (EAb) of the third subpixel (SPb) may have a size corresponding to the third anode electrode (141b).

[0102] As illustrated in Fig. 2, the third anode electrode (141b) may be placed on the upper side of the first anode electrode (141r) and the upper side of the second anode electrode (141g). The third anode electrode (141b) may vertically overlap the first anode electrode (141r) and the second anode electrode (141g).

[0103] The size of the third anode electrode (141b) may be larger than the size of the first anode electrode (141r). The size of the third anode electrode (141b) may be larger than the size of the second anode electrode (141g). The size of the third anode electrode (141b) may be equal to or larger than the sum of the sizes of the first anode electrode (141r) and the second anode electrode (141g), but is not limited thereto.

[0104] According to an embodiment, in a third subpixel (SPb) having the same size as the pixel (P), the size of the third anode electrode (141b) of the third organic light-emitting element (140b) can be designed to be equal to or larger than the sum of the sizes of the first anode electrode (141r) and the second anode electrode (141g). Accordingly, the occupied area of ​​the third light-emitting area (EAb) of the third subpixel (SPb) within the pixel (P) is maximized, thereby increasing the lifetime luminous efficacy of the third color light, i.e., blue light, thereby improving the image quality.

[0105] The first organic light-emitting layer (142r) and the second organic light-emitting layer (142g) can be independently disposed in the first subpixel (SPr) and the second subpixel (SPg). That is, the first organic light-emitting layer (142r) can be disposed only in the first subpixel (SPr), and the second organic light-emitting layer (142g) can be disposed only in the second subpixel (SPg).

[0106] The first organic light-emitting layer (142r) may be disposed on the first anode electrode (141r) in the first subpixel (SPr), and the second organic light-emitting layer (142g) may be disposed on the second anode electrode (141g) in the second subpixel (SPg). The first organic light-emitting layer (142r) may be disposed on a portion of an upper side of the first bank (120) located on each of both sides of the first subpixel (SPr). The second organic light-emitting layer (142g) may be disposed on a portion of an upper side of the first bank (120) located on each of both sides of the second subpixel (SPg). The first organic light-emitting layer (142r) and the second organic light-emitting layer (142g) may be disposed to be spaced apart from each other on the upper side of the first bank (120).

[0107] The third organic light-emitting layer (142b) may be disposed over the entire area of ​​the substrate (100), but is not limited thereto. That is, the third organic light-emitting layer (142b) may be disposed not only on the third subpixel (SPb) but also between the third subpixels (SPb). For example, the third organic light-emitting layer (142b) may be disposed on a plurality of third anode electrodes (141b) and a plurality of second banks (125).

[0108] According to the embodiment, since the organic light-emitting material forming the third organic light-emitting layer (142b) is deposited over the entire area of ​​the substrate (100), there is no need to use a separate mask, so the degree of process freedom is increased and the yield can be improved.

[0109] The first cathode electrode (143r) and the second cathode electrode (143g) may be disposed on the substrate (100). That is, the first cathode electrode (143r) and the second cathode electrode (143g) may be disposed integrally on the substrate (100) without being separated from each other. For example, the first cathode electrode (143r) and the second cathode electrode (143g) may be disposed commonly only on the first subpixel (SPr) and the second subpixel (SPg) as an integrated cathode electrode.

[0110] Meanwhile, in the embodiment, the first anode electrode (141r) and the second anode electrode (141g) may include reflective electrodes having excellent reflective characteristics. In this case, the first color light generated from the first organic light-emitting layer (142r) and the second color light generated from the second organic light-emitting layer (142g) are reflected by the first anode electrode (141r) and the second anode electrode (141g) and emitted forward, respectively, thereby increasing the light extraction efficiency and improving the image quality.

[0111] In an embodiment, the first cathode electrode (143r) and the second cathode electrode (143g) may include a transparent or translucent conductive film.

[0112] When the first cathode electrode (143r) and the second cathode electrode (143g) include a translucent conductive film, recycling of the first color light may occur between the first anode electrode (141r) and the first cathode electrode (143r) and between the second anode electrode (141g) and the second cathode electrode (143g), thereby improving light extraction efficiency. That is, the first color light generated in the first organic light-emitting layer (142r) may be reflected by the first cathode electrode (143r) and may travel downward, and may be reflected again by the first anode electrode (141r) and travel upward. A portion of the first color light that travels upward may transmit through the first cathode electrode (143r) and be emitted forward, and another portion may be reflected by the first cathode electrode (143r). In this way, by recycling the first color light between the first cathode electrode (143r) and the first anode electrode (141r), more first color light can be emitted forward, thereby improving light efficiency.

[0113] Likewise, the second color light generated from the second organic light-emitting layer (142g) is recycled between the second cathode electrode (143g) and the second anode electrode (141g), so that more second color light is emitted forward, thereby improving light extraction efficiency.

[0114] In an embodiment, the third anode electrode (141b) may include a transparent conductive film, and the third cathode electrode (143b) may include a transparent or translucent conductive film.

[0115] When the first cathode electrode (143r), the second cathode electrode (143g), and the third cathode electrode (143b) include a transparent or translucent conductive film, recycling of the third color light may occur between the third cathode electrode (143b) and the first cathode electrode (143r) and between the third cathode electrode (143b) and the second cathode electrode (143g), thereby improving the light extraction efficiency. That is, the third color light generated in the third organic light-emitting layer (142b) may be reflected by the third cathode electrode (143b) and may travel downward, and may be reflected again by the first cathode electrode (143r) and / or the second cathode electrode (143g) and may travel upward. A portion of the third color light that has advanced upward may be emitted forward by transmitting through the third cathode electrode (143b), and another portion may be reflected by the third cathode electrode (143b). In this way, since the third color light is recycled between the third cathode electrode (143b) and the first cathode electrode (143r), more third color light may be emitted forward, thereby improving light efficiency.

[0116] Meanwhile, referring to FIGS. 1 and 2, a plurality of insulating layers (150 to 152, 160) may be disposed on the substrate (100). The plurality of insulating layers (150 to 152, 160) may include at least one inorganic insulating layer and at least one organic insulating layer (160). For example, the inorganic insulating layer may include SiNx, SiO2, etc., but is not limited thereto.

[0117] Among the plurality of insulating layers (150, 160, 151) disposed between the first organic light-emitting element (140r) and the third organic light-emitting element (140b), the lowermost layer (150) and the uppermost layer (151) may be inorganic insulating layers. For example, the plurality of insulating layers (150, 160, 151) may include a first inorganic insulating layer (150), an organic insulating layer (160), a second inorganic insulating layer (151), a third inorganic insulating layer (152), etc., but are not limited thereto. At least one of the first inorganic insulating layer (150), the organic insulating layer (160), and the second inorganic insulating layer (151) may be omitted. The organic insulating layer (160) may be disposed between the first inorganic insulating layer (150) and the second inorganic insulating layer (151).

[0118] The first inorganic insulating layer (150) may be disposed on the first organic light-emitting element (140r) and the second organic light-emitting element (140g). The first inorganic insulating layer (150) may be disposed on the upper side of the first cathode electrode (143r) of the first organic light-emitting element (140r) and the upper side of the second cathode electrode (143g) of the second organic light-emitting element (140g). The first inorganic insulating layer (150) may prevent moisture, oxygen, etc. from penetrating into the first organic light-emitting layer (142r) under the first cathode electrode (143r) and the second organic light-emitting layer (142g) under the second cathode electrode (143g).

[0119] The second inorganic insulating layer (151) may be disposed under the third organic light-emitting element (140b). The second inorganic insulating layer (151) may be disposed under the third anode electrode (141b) of the third organic light-emitting element (140b). The second inorganic insulating layer (151) may prevent moisture, oxygen, etc. from penetrating into the third organic light-emitting layer (142b) over the third anode electrode (141b).

[0120] Meanwhile, the third inorganic insulating layer (152) may be disposed on the third organic light-emitting element (140b). The third inorganic insulating layer (152) may be disposed on the third cathode electrode (143b) of the third organic light-emitting element (140b). The third inorganic insulating layer (152) may prevent moisture, oxygen, etc. from penetrating into the third organic light-emitting layer (142b) under the third cathode electrode (143b).

[0121] Using the connection portion (180) illustrated in FIG. 1, the first cathode electrode (143r) of the first organic light-emitting element (140r), the second cathode electrode (143g) of the second organic light-emitting element (140g), and the third cathode electrode (143b) of the third organic light-emitting element (140b) illustrated in FIG. 2 can be connected to a power line. The power line can be grounded or 0 V.

[0122] Referring to FIGS. 3a and 3b, the electrical connection between the cathode electrodes (143r, 143g, 143b) and the power line (103) is described in detail.

[0123] Figures 3a and 3b illustrate how the cathode electrode of each organic light-emitting element is connected to a power line.

[0124] As illustrated in FIG. 3a, the cathode electrodes (143r, 143g, 143b) of each organic light-emitting element (140r, 140g, 140b) can be electrically connected to a power line (103) using a connecting portion (180).

[0125] The connecting portion (180) may be placed in a non-display area (NAA). The connecting portion (180) may be placed on a power line (103) in the non-display area (NAA).

[0126] The connecting portion (180) may include a pad electrode (181). The pad electrode (181) may be formed simultaneously with the first anode electrode (141r) of the first organic light-emitting element (140r) using the same conductive material and the same patterning process, but is not limited thereto. Accordingly, the connecting portion (180) may be disposed on the upper surface of the protective layer (110) similarly to the first anode electrode (141r).

[0127] The pad electrode (181) can be electrically connected to a power line (103) through a protective layer (110).

[0128] The power line (103) may be formed together with the first driving circuit (101r), for example, when forming the gate electrode, source electrode, and drain electrode of the driving transistor, but is not limited thereto.

[0129] The first cathode electrode (143r) of the first organic light-emitting element (140r), the second cathode electrode (143g) of the second organic light-emitting element (140g), and the third cathode electrode (143b) of the third organic light-emitting element (140b) may each be arranged to extend to the non-display area (NAA). The first cathode electrode (143r) of the first organic light-emitting element (140r), the second cathode electrode (143g) of the second organic light-emitting element (140g), and the third cathode electrode (143b) of the third organic light-emitting element (140b) may each be electrically connected to the pad electrode (181) in the non-display area (NAA).

[0130] As illustrated in FIG. 3a, the first organic light-emitting layer (142r) may be arranged in units of column lines along the first direction (X), while being arranged so as to be continuously connected in a stripe shape along the second direction (Y). Similarly, the second organic light-emitting layer (142g) may be arranged in units of column lines along the first direction (X), while being arranged so as to be continuously connected in a stripe shape along the second direction (Y).

[0131] As illustrated in FIG. 3b, the pad electrode may include a lower pad electrode (181) and an upper pad electrode (182). The lower pad electrode (181) may be the same as the pad electrode (181) illustrated in FIG. 3a.

[0132] The upper pad electrode (182) may be disposed to extend from the lower pad electrode (181) onto the second inorganic insulating layer (151) in the non-display area (NAA). The upper pad electrode (182) may be simultaneously formed using the same conductive material as the third anode electrode (141b) of the third organic light-emitting element (140b) using the same patterning process, but is not limited thereto. Accordingly, the upper pad electrode (182) may be disposed on the upper surface of the second inorganic insulating layer (151) like the third anode electrode (141b). Fig. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment. Fig. 4 is a cross-sectional view taken along line AA' in the organic light-emitting display device of Fig. 1.

[0133] The second embodiment is similar to the first embodiment (Fig. 2) except that the third organic light-emitting element (140b) is positioned below the first organic light-emitting element (140r) and the second organic light-emitting element (140g). In the second embodiment, components having the same structure, shape, and / or function as those in the first embodiment are given the same drawing reference numerals, and detailed descriptions are omitted.

[0134] Referring to FIG. 1 and FIG. 4, it may include a substrate (100), a plurality of driving circuits (101r, 101g, 101b), a protective layer (110), a plurality of banks (120, 125), a plurality of organic light-emitting elements (140r, 140g, 140b), a plurality of insulating layers (150 to 152, 160), etc.

[0135] In an embodiment, a plurality of pixels (P) arranged on a substrate (100) may each include a first subpixel (SPr), a second subpixel (SPg), and a third subpixel (SPb) that are arranged three-dimensionally. The first subpixel (SPr) and the second subpixel (SPg) may be arranged to overlap each other horizontally. The third subpixel (SPb) may be arranged to overlap the first subpixel (SPr) and the second subpixel (SPg) vertically.

[0136] As described above, in the first embodiment (Fig. 2), the third subpixel (SPb) may be disposed above the first subpixel (SPr) and the second subpixel (SPg). In contrast, in the second embodiment (Fig. 4), the third subpixel (SPb) may be disposed below the first subpixel (SPr) and the second subpixel (SPg).

[0137] The first organic light-emitting element (140r) may be placed in the first subpixel (SPr), the second organic light-emitting element (140g) may be placed in the second subpixel (SPg), and the third organic light-emitting element (140b) may be placed in the third subpixel (SPb).

[0138] Since the first subpixel (SPr), the second subpixel (SPg), and the third subpixel (SPb) are arranged three-dimensionally, the first organic light-emitting element (140r), the second organic light-emitting element (140g), and the third organic light-emitting element (140b) can also be arranged three-dimensionally. The first organic light-emitting element (140r) and the second organic light-emitting element (140g) can be arranged to overlap each other horizontally. The third organic light-emitting element (140b) can be arranged to overlap the first organic light-emitting element (140r) and the second organic light-emitting element (140g) vertically.

[0139] The third organic light-emitting element (140b) may be placed below the first organic light-emitting element (140r) and the second organic light-emitting element (140g).

[0140] The third organic light-emitting element (140b) may be disposed between the substrate (100) and the first inorganic insulating layer (150), and the first organic light-emitting element (140r) and the second organic light-emitting element (140g) may be disposed between the second inorganic insulating layer (151) and the third inorganic insulating layer (152). The organic insulating layer (160) may be disposed between the first inorganic insulating layer (150) and the second inorganic insulating layer (151).

[0141] Meanwhile, the first anode electrode (141r) of the first organic light-emitting element (140r) may be electrically connected to the first driving circuit (101r). The first anode electrode (141r) may be electrically connected to the first driving circuit (101r) through a plurality of insulating layers (150 to 152, 160), the first bank (120), and the protective layer (110).

[0142] The second anode electrode (141g) of the second organic light-emitting element (140g) may be electrically connected to the second driving circuit (101g). The second anode electrode (141g) may be electrically connected to the second driving circuit (101g) through a plurality of insulating layers (150 to 152, 160), the first bank (120), and the protective layer (110).

[0143] The third anode electrode (141b) of the third organic light-emitting element (140b) can be electrically connected to the third driving circuit (101b). Since the third anode electrode (141b) and the third driving circuit (101b) are arranged with the protective layer (110) interposed therebetween, the third anode electrode (141b) can be electrically connected to the third driving circuit (101b) through the protective layer (110).

[0144] Meanwhile, the third anode electrode (141b) may include a reflective electrode, and the third cathode electrode (143b) may include a transparent or translucent conductive film. The first anode electrode (141r) and the second anode electrode (141g) may include transparent conductive films, and the first cathode electrode (143r) and the second cathode electrode (143g) may include transparent or translucent conductive films.

[0145] In this case, the first color light, the second color light, and the third color light are recycled between the first cathode electrode (143r) and the third cathode electrode (143b), between the second cathode electrode (143g) and the third cathode electrode (143b), and between the third anode electrode (141b) and the third cathode electrode (143b), respectively, so that the light extraction efficiency can be improved.

[0146] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the embodiments should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalency range of the embodiments are intended to be included within the scope of the embodiments.

Claims

1. Contains multiple pixels on the substrate, The above plurality of pixels each include a first subpixel, a second subpixel, and a third subpixel having a three-dimensional structure, The second subpixel is arranged to horizontally overlap the first subpixel, The third subpixel is arranged to vertically overlap the first subpixel and the second subpixel, The first subpixel includes a first organic light-emitting element, The second subpixel comprises a second organic light-emitting element, The third subpixel comprises a third organic light-emitting element, Organic light emitting display device.

2. In paragraph 1, The size of the above pixel is the same as the size of the third subpixel. Organic light emitting display device.

3. In paragraph 1, The size of the above pixel is equal to the sum of the size of the first subpixel and the size of the second subpixel. Organic light emitting display device.

4. In paragraph 1, The second organic light-emitting element is arranged to horizontally overlap the first organic light-emitting element, The third organic light-emitting element is arranged to vertically overlap the first organic light-emitting element and the second organic light-emitting element. Organic light emitting display device.

5. In paragraph 1, The first organic light-emitting element, the second organic light-emitting element and the third organic light-emitting element each include an anode electrode, an organic light-emitting layer and a cathode electrode, The anode electrode is independently arranged in the first subpixel, the second subpixel and the third subpixel, The cathode electrode is commonly arranged in the first subpixel and the second subpixel. Organic light emitting display device.

6. In paragraph 5, The first subpixel, the second subpixel and the third subpixel each include a light-emitting region and a non-light-emitting region, The above-mentioned luminescent area has a size corresponding to the anode electrode, Organic light emitting display device.

7. In paragraph 6, The third anode electrode of the third organic light-emitting element vertically overlaps the first anode electrode of the first organic light-emitting element and the second anode electrode of the second organic light-emitting element. Organic light emitting display device.

8. In paragraph 6, The size of the third anode electrode of the third organic light-emitting element is larger than the size of the first anode electrode of the first organic light-emitting element or the size of the second anode electrode of the second organic light-emitting element. Organic light emitting display device.

9. In paragraph 5, The third subpixel is disposed on the first subpixel and the second subpixel. Organic light emitting display device.

10. In paragraph 9, The first anode electrode of the first organic light-emitting element and the second anode electrode of the second organic light-emitting element include a reflective metal, The first cathode electrode of the first organic light-emitting element and the second cathode electrode of the second organic light-emitting element include a transparent or translucent conductive film, The third anode electrode of the third organic light-emitting element includes a transparent conductive film, The third cathode electrode of the third organic light-emitting element comprises a transparent or translucent conductive film. Organic light emitting display device.

11. In paragraph 5, The third subpixel is positioned below the first subpixel and the second subpixel. Organic light emitting display device.

12. In paragraph 11, The third anode electrode of the third organic light-emitting element comprises a reflective metal, The third cathode electrode of the third organic light-emitting element includes a transparent or translucent conductive film, The first anode electrode of the first organic light-emitting element and the second anode electrode of the second organic light-emitting element include a transparent conductive film, The first cathode electrode of the first organic light-emitting element and the second cathode electrode of the second organic light-emitting element include a transparent or translucent conductive film. Organic light emitting display device.

13. In paragraph 1, Further comprising a plurality of insulating layers between the first organic light-emitting element, the second organic light-emitting element, and the third organic light-emitting element; The above multiple insulating layers include at least one organic insulating layer and at least one inorganic insulating layer. Organic light emitting display device.

14. In paragraph 13, Among the above multiple insulating layers, the lowest and uppermost layers are inorganic insulating layers. Organic light emitting display device.

15. In paragraph 1, a plurality of first banks between the plurality of first subpixels and the plurality of second subpixels; and Further comprising a plurality of second banks between the plurality of third subpixels; Organic light emitting display device.

16. In paragraph 15, The second distance between the plurality of second banks is greater than the first distance between the plurality of first banks. Organic light emitting display device.

17. In paragraph 15, The second distance between the plurality of second banks is equal to the width of the pixel or the width of the third subpixel. Organic light emitting display device.

18. In paragraph 1, One of the first organic light-emitting element and the second organic light-emitting element comprises a red organic light-emitting element and the other comprises a green organic light-emitting element, The third organic light-emitting element comprises a blue organic light-emitting element. Organic light emitting display device.

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