Organic light-emitting display device

Abstract

This organic light-emitting display device may comprise: multiple anode electrodes on multiple sub-pixels; multiple organic light-emitting layers on the multiple anode electrodes; multiple cathode electrodes on the multiple organic light-emitting layers; multiple inorganic insulating layers on the multiple cathode electrodes; multiple first protruding portions disposed between multiple sub-pixels in a first direction, the multiple first protruding portions having multiple first undercut structures on side portions thereof; multiple first waterproof structures on the multiple first protruding portions; and multiple second waterproof structures in the multiple first undercut structures of the multiple first protruding portions. The first waterproof structures may be configured by overlapping at least two inorganic insulating layers among the multiple inorganic insulating layers on the first protruding portions.

Description

organic light emitting display device

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

[0002] As demand for portable information media grows, efforts are expanding to apply organic light-emitting diode (OLED) displays to a variety of lightweight and thin information electronic devices. Recently, OLED displays are increasingly being applied to product groups such as mobile PCs and automobiles, rather than TVs or mobile phones. Because OLED displays used in mobile PCs and automobiles display still images for extended periods of time, long lifespan is essential. To achieve long lifespan, light extraction from the OLEDs in the OLED display must be maximized. Furthermore, to reduce costs, technology must be expanded to enable the production of OLEDs on substrates of not only 8.5th-generation (2200 x 2500 mm) but also 10.5th-generation (3370 x 2940 mm). To produce long-lasting OLEDs, each subpixel must have a top-emitting structure and a side-by-side structure, with at least two stacks of OLEDs.

[0003] The structure of these organic light-emitting devices can be obtained through deposition equipment using a fine metal mask (FMM, hereinafter referred to as FMM). However, the deposition method using FMM has the problem of low productivity because the production logistics must be produced only in a cluster manner rather than an inline method. In addition, there is a problem of low pixel position accuracy (PPA) at the subpixel level between the FMM and the substrate. Accordingly, the emission area ratio (EAR) is small, which limits the product lifespan. Here, EAR is the value obtained by dividing the emission area of ​​a subpixel by the total area of ​​the subpixel.

[0004] Therefore, it is very urgent to develop an organic light-emitting display device having a new deposition method and a new organic light-emitting element structure using the new deposition method to solve the aforementioned problems.

[0005] The present invention aims to solve the above-mentioned and other problems.

[0006] Another object of the embodiment is to provide an organic light emitting display device having a novel structure.

[0007] Another object of the present invention is to provide an organic light emitting display device capable of improving lifespan.

[0008] Another object of the present invention is to provide an organic light-emitting display device capable of improving productivity and yield.

[0009] Another object of the present invention is to provide an organic light-emitting display device capable of improving image quality.

[0010] 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.

[0011] According to one aspect of the embodiment to achieve the above or other objects, an organic light-emitting display device includes: a plurality of subpixels having different colors along a first direction (X) and having the same color along a second direction crossing the first direction; a plurality of anode electrodes on the plurality of subpixels; a plurality of organic light-emitting layers on the plurality of anode electrodes; a plurality of cathode electrodes on the plurality of organic light-emitting layers; a plurality of inorganic insulating layers on the plurality of cathode electrodes; a plurality of first protrusions disposed between the plurality of subpixels in the first direction and having a plurality of first undercut structures on side portions; a plurality of first waterproof structures on the plurality of first protrusions; and a plurality of second waterproof structures on the plurality of first undercut structures of the plurality of first protrusions; wherein the first waterproof structure may be configured such that at least two or more inorganic insulating layers among the plurality of inorganic insulating layers overlap on the first protrusions.

[0012] The first protrusion includes a pillar layer and a roof layer on the pillar layer, the first undercut structure is formed by a width of the pillar layer being smaller than a width of the roof layer, and the organic light-emitting layer can be disposed on a side of the pillar layer.

[0013] The width between the light-emitting areas of each of the plurality of subpixels in the first direction may be the width of the pillar layer.

[0014] The above second waterproof structure may be configured such that one of the plurality of inorganic insulating layers is formed into an inorganic film / inorganic film bonding structure by the first undercut structure.

[0015] The organic light-emitting display device may further include a plurality of second protrusions between the plurality of subpixels in the second direction.

[0016] The organic light-emitting display device further includes a plurality of third waterproof structures on the side portions of the plurality of second protrusions, wherein the second protrusions include a pillar layer and a roof layer on the pillar layer, and a width of the pillar layer is smaller than a width of the roof layer, so that a second undercut structure can be formed on the side portions of the second protrusions.

[0017] The organic light-emitting display device may further include a plurality of connection structures in the second undercut structure of the second protrusion.

[0018] The organic light-emitting display device may further include a blocking structure in an edge area of ​​at least one of the first protrusion and the second protrusion.

[0019] The organic light-emitting display device may further include a display area including the plurality of subpixels; a non-display area including a plurality of dummy subpixels; a plurality of third protrusions extending from the plurality of first protrusions to the non-display area along the second direction; and a plurality of third waterproof structures on the plurality of third protrusions.

[0020] The organic light-emitting display device may further include a plurality of first banks below the plurality of first protrusions, and the organic light-emitting layer may be disposed on an upper side of the first banks.

[0021] The organic light emitting display device further includes a plurality of second banks between the plurality of subpixels in the second direction, and the cathode electrodes can be continuously arranged on the subpixels adjacent to the second bank on the second bank.

[0022] The effects of the organic light-emitting display device according to the embodiment are described as follows.

[0023] According to at least one of the embodiments, the process may be simplified and the process cost may be reduced by eliminating the need to use FMM.

[0024] According to at least one of the embodiments, the EAR within a subpixel may be increased without the need for FMM, thereby improving the lifetime.

[0025] According to at least one of the embodiments, an organic light-emitting device can be deposited on a large-area substrate in an inline deposition system, thereby improving productivity, yield, and material utilization efficiency.

[0026] According to at least one of the embodiments, the width between the light-emitting areas of each of the plurality of subpixels in the first direction is reduced to the width of the column layer of the first protrusion, thereby increasing the light-emitting area, thereby increasing the lifespan and brightness, and thus improving the image quality.

[0027] According to at least one of the embodiments, a plurality of connection structures may be arranged in the first grooves of the plurality of first banks between the plurality of subpixels in the second direction. Accordingly, the cathode electrode of each subpixel is electrically connected to the first power wire through the plurality of connection structures, thereby facilitating electrical connection between the cathode electrode and the first power wire and preventing a short circuit defect, thereby preventing a malfunction or a light emission defect of the subpixel, thereby improving reliability.

[0028] According to at least one of the embodiments, a plurality of waterproof structures are arranged in the protrusion, so that penetration of moisture, oxygen, etc. can be completely blocked.

[0029] According to at least one of the embodiments, a plurality of blocking structures may be arranged at the edges of the pillar layers of the banks and / or protrusions. Accordingly, lateral leakage current or longitudinal leakage current is prevented, thereby preventing image quality defects such as color staining and significantly improving luminous efficiency and brightness. In addition, electrical shorts between the anode and cathode electrodes within the subpixels are prevented, thereby preventing malfunctions or luminous defects, thereby enhancing product reliability.

[0030] 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.

[0031] FIG. 1 is a plan view schematically illustrating an organic light-emitting display device according to a first embodiment.

[0032] FIG. 2 is a cross-sectional view illustrating an organic light-emitting display device according to the first embodiment.

[0033] Fig. 3 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment.

[0034] Fig. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment.

[0035] FIG. 5 is a plan view schematically illustrating an organic light-emitting display device according to a second embodiment.

[0036] Fig. 6 is a cross-sectional view illustrating an organic light-emitting display device according to a fourth embodiment.

[0037] Fig. 7 is a cross-sectional view illustrating an organic light-emitting display device according to the fifth embodiment.

[0038] 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.

[0039] 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.

[0040] Hereinafter, an organic light-emitting display device having a side-by-side structure manufactured using a photolithography process is disclosed. This structure is referred to as a side-by-side structure by photolithography (Ph-SbS). By using a photolithography process, the use of an FMM is eliminated, simplifying the process and reducing the process cost. In addition, the EAR within a subpixel is increased, thereby improving the lifespan. In addition, since an organic light-emitting element is deposited on a large-area substrate in an inline deposition system, productivity, yield, and material utilization efficiency can be improved.

[0041] Hereinafter, the red subpixel may be referred to as a first subpixel, the green subpixel may be referred to as a second subpixel, and the blue subpixel may be referred to as a third subpixel. In addition, the red organic light-emitting element may be referred to as a first organic light-emitting element, the green organic light-emitting element may be referred to as a second organic light-emitting element, and the blue organic light-emitting element may be referred to as a third organic light-emitting element.

[0042] Hereinafter, the organic light-emitting display device is a top-emitting type that displays an image by emitting light in the upper direction of the substrate, but a bottom-emitting type that displays an image by emitting light in the lower direction of the substrate may also be included in the technical concept of the present invention.

[0043] FIG. 1 is a plan view schematically illustrating an organic light-emitting display device according to a first embodiment.

[0044] As illustrated in FIG. 1, the organic light-emitting display device according to the first embodiment may include a plurality of pixels (P) arranged in a matrix. The plurality of pixels (P) may be arranged in a display area (AA). An area other than the display area (AA) may be defined as a non-display area (NAA).

[0045] The plurality of pixels (P) may include, for example, a plurality of red subpixels (SPr), a plurality of green subpixels (SPg), a plurality of blue subpixels (SPb), etc. The plurality of subpixels (SPr, SPg, SPb) may have different colors along the first direction (X) and the same color along the second direction (Y), but this is not limited thereto. That is, the plurality of subpixels (SPr, SPg, SPb) may have the same color along the second direction (Y) and may have a long stripe pattern.

[0046] The organic light-emitting layer and the cathode electrode of each of the plurality of organic light-emitting elements (120r, 120g, 120b) may have a stripe pattern having the same color and being arranged elongated along the second direction (Y). For example, a plurality of red subpixels (SPr) emitting red light may be arranged in a stripe shape along the second direction (Y). For example, a plurality of green subpixels (SPg) emitting green light may be arranged in a stripe shape along the second direction (Y). For example, a plurality of green subpixels (SPg) emitting blue light may be arranged in a stripe shape along the second direction (Y).

[0047] A side-by-side organic light-emitting display device can be implemented by alternately arranging red subpixels (SPr), green subpixels (SPg), and blue subpixels (SPb) in units of columns along a first direction (X). For example, the red subpixels (SPr), green subpixels (SPg), and blue subpixels (SPb) can be alternately arranged in the order of the first direction (X), but this is not limited thereto.

[0048] For example, a red organic light-emitting element (120r) may be placed in a red subpixel (SPr), a green organic light-emitting element (120g) may be placed in a green subpixel (SPg), and a blue organic light-emitting element (120b) may be placed in a green subpixel (SPg).

[0049] Each of the plurality of subpixels (SPr, SPg, SPb) may include an emitting area (EA) and a non-emitting area (NEA). The emitting area (EA) is an area where the organic light-emitting elements (120r, 120g, 120b) are arranged, and the non-emitting area (NEA) may be defined as an area excluding the emitting area (EA).

[0050] The red organic light-emitting device (120r), the green organic light-emitting device (120g), and the blue organic light-emitting device (120b) may each include an anode electrode, an organic light-emitting layer, a cathode electrode, etc. The organic light-emitting layer may include a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, an electron injection layer, a charge generation layer, etc. The red organic light-emitting device (120r), the green organic light-emitting device (120g), and the blue organic light-emitting device (120b) may each include at least two stack structures. Each stack structure may include an organic light-emitting layer that emits light.

[0051] The organic light-emitting layer and the cathode electrode may be disposed only in each of the plurality of subpixels (SPr, SPg, SPb) along the first direction (X). That is, the organic light-emitting layer and the cathode electrode may not be disposed continuously along the first direction (X) but may be separated from each other. Alternatively, as described above, the organic light-emitting layer and the cathode electrode of each of the plurality of organic light-emitting elements (120r, 120g, 120b) may have a stripe pattern having the same color and being disposed long along the second direction (Y). That is, the organic light-emitting layer and the cathode electrode may be disposed across the plurality of subpixels (SPr, SPg, SPb) along the second direction (Y). That is, the organic light-emitting layer and the cathode electrode may be disposed so as to extend not only across the plurality of subpixels (SPr, SPg, SPb) but also between the plurality of subpixels (SPr, SPg, SPb) along the second direction (Y).

[0052] Meanwhile, although not shown, a plurality of power wires may be provided to supply power to a plurality of subpixels (SPr, SPg, SPb) to supply the first potential voltage.

[0053] The plurality of power wires may include a plurality of first power wires and a plurality of second power wires arranged in a display area (AA) and a third power wire arranged in a non-display area (NAA).

[0054] A plurality of first power wires and a plurality of second power wires may be arranged in a matrix structure in a display area (AA). The plurality of first power wires may be arranged in regions between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y), and the plurality of second power wires may be arranged in regions between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). The third power wire may electrically connect the power terminal and the second power wire in the non-display area (NAA).

[0055] Each of the plurality of subpixels (SPr, SPg, SPb) may include a driving circuit including a driving transistor, etc.

[0056] Although not shown, another power line may be provided to supply a second potential voltage greater than the first potential voltage. Another power line may be electrically connected to the driving transistor of each subpixel (SPr, SPg, SPb), but is not limited thereto.

[0057] When a specific subpixel (SPr, SPg, SPb) is selected by a scan transistor responding to a scan signal, light having a brightness corresponding to a current flowing in the driving transistor can be emitted from the specific subpixel (SPr, SPg, SPb) using a first potential voltage of a plurality of power wires and a second potential voltage of another power wire.

[0058] Meanwhile, a plurality of protrusions (124, 127) may be arranged between a plurality of subpixels (SPr, SPg, SPb). As will be described later, the protrusions may be members that protrude upward from the upper surface of each of the organic light-emitting elements (120r, 120g, 120b) of the plurality of subpixels (SPr, SPg, SPb).

[0059] The plurality of protrusions may include a plurality of first protrusions (124) and a plurality of second protrusions (127). The plurality of first protrusions (124) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and the plurality of second protrusions (127) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0060] A plurality of first protrusions (124) may be formed as third protrusions by extending between a plurality of dummy subpixels (SPrd, SPgd, SPbd) on a non-display area (NAA). The non-display area (NAA) is an area vulnerable to penetration of moisture, oxygen, etc. In an embodiment, a plurality of fourth waterproof structures may be provided on the third protrusions, thereby preventing penetration of moisture, oxygen, etc. The plurality of fourth waterproof structures may be provided between a plurality of dummy subpixels (SPrd, SPgd, SPbd) in the first direction (X) or between a plurality of dummy subpixels (SPrd, SPgd, SPbd) in the first direction (X) and a plurality of dummy subpixels (SPrd, SPgd, SPbd) in the second direction (Y). The fourth waterproof structure may be the same as the structure of the third waterproof structure (128-1, 128-2) illustrated in FIG. 3.

[0061] A plurality of waterproof structures (125, 126-1, 26-2), a plurality of blocking structures, etc. may be arranged on a first protrusion (124) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). A plurality of connection structures (130-1, 130-2) may be arranged on a second protrusion (127) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0062] Since the first protrusion (124) is formed with a structure capable of not only waterproof blocking but also electrical blocking, a plurality of blocking structures may be omitted. For example, when the influence of the leakage current between the plurality of subpixels (SPr, SPg, SPb) in the first direction (X), i.e., the lateral leakage current, on the picture quality is minimal, a plurality of blocking structures may not be arranged between the plurality of subpixels (SPr, SPg, SPb) in the first direction (X). The connection structures (130-1, 130-2) can electrically connect the second power wiring arranged between the plurality of subpixels (SPr, SPg, SPb) in the second direction (Y) to a plurality of cathode electrodes of the plurality of organic light-emitting elements (120r, 120g, 120b) of the plurality of subpixels (SPr, SPg, SPb).

[0063] The blocking structure may be a structure that separates layers including low-resistance organic light-emitting materials of each organic light-emitting element (120r, 120g, 120b), such as a hole injection layer and a charge generation layer, to prevent electrical shorts between the anode electrode and the cathode electrode and reduce leakage current between sub-pixels.

[0064] As will be explained later, lateral leakage current or longitudinal leakage current between a plurality of subpixels (SPr, SPg, SPb) can be prevented by the blocking structure. The lateral leakage current may be a leakage current flowing between adjacent subpixels (SPr, SPg, SPb) along a first direction (X), and the longitudinal leakage current may be a leakage current flowing between adjacent subpixels (SPr, SPg, SPb) along a second direction (Y). In addition, an electrical short between the anode electrode and the cathode electrode in the corresponding subpixels (SPr, SPg, SPb) can be prevented by the blocking structure. Therefore, by using the blocking structure, color spotting caused by leakage current can be improved, and luminous efficiency and brightness can be significantly improved. In addition, since an electrical short between the anode electrode and the cathode electrode is prevented, a malfunction or a luminous defect can be prevented, so that product reliability can be improved.

[0065] A plurality of waterproof structures (125, 126-1, 26-2) may be arranged in the display area (AA) and / or the non-display area (NAA). For example, a plurality of waterproof structures (125, 126-1, 26-2) may be arranged between a plurality of sub-pixels (SPr, SPg, SPb) in the first direction (X) and / or the second direction (Y) in the display area (AA) and / or the non-display area (NAA). A plurality of waterproof structures (125, 126-1, 26-2) may be arranged in the non-emission area (NEA) of each of the plurality of sub-pixels (SPr, SPg, SPb) in the first direction (X) and / or the second direction (Y).

[0066] The plurality of waterproof structures may include a plurality of first waterproof structures (125), a plurality of second waterproof structures (126-1, 126-2), a plurality of third waterproof structures, etc. As will be described later, the plurality of first waterproof structures (125) and the plurality of second waterproof structures (126-1, 126-2) may be provided on the plurality of first protrusions (124), and the plurality of third waterproof structures may be provided on the plurality of second protrusions (127). The third waterproof structure may prevent moisture, oxygen, etc. from penetrating the connection structures (130-1, 130-2) and deteriorating the connection characteristics, or may block a passage through which moisture, oxygen, etc. penetrate into adjacent subpixels, thereby improving the reliability of products in high-humidity environments.

[0067] Meanwhile, organic light-emitting layers, etc. are vulnerable to moisture, oxygen, etc., and if the organic light-emitting layers, etc. are damaged by moisture, oxygen, etc., the corresponding subpixels (SPr, SPg, SPb) may not operate, resulting in light-emitting defects. If many subpixels (SPr, SPg, SPb) do not operate due to moisture, oxygen, etc., display defects such as point light-emitting defects or area light-emitting defects may occur, which may lower product reliability.

[0068] However, a plurality of waterproof structures (125, 126-1, 26-2) as in the embodiment can prevent moisture, oxygen, etc. from penetrating into the non-display area (NAA) or the display area (AA), thereby preventing malfunctions in operation or light emission of the subpixels (SPr, SPg, SPb). Accordingly, the organic light-emitting layers of the subpixels (SPr, SPg, SPb) are not affected by moisture, oxygen, etc., so that reliability can be drastically improved.

[0069] Meanwhile, instead of a bank, a pillar layer (162 in FIG. 2) may be arranged on the substrate between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X), and a bank may be arranged on the substrate between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y). Instead of a bank, a pillar layer (162 in FIG. 2) may be arranged on the substrate between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0070] In this case, the width (W1) between the light-emitting areas (EA) among the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) is reduced to the width of the pillar layer of the first protrusion (124) which is smaller than the width of the roof layer (163 in FIG. 2), so that the area of ​​the light-emitting area (EA) of each subpixel (SPr, SPg, SPb) can be increased.

[0071] In the drawing, the dotted box indicates the light emitting area (EA) (or its area) of each subpixel (SPr, SPg, SPb), and the solid line indicates a plurality of subpixels (SPr, SPg, SPb) having a plurality of waterproof structures (125, 126-1, 26-2) in a stripe shape.

[0072] A width (W1) between the light-emitting areas (EA) may be determined by a portion of a plurality of first protrusions (124) arranged between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), for example, by a width of a pillar layer. That is, by reducing the width (W1) between the light-emitting areas (EA) by the width of the pillar layer, the area of ​​the light-emitting area (EA) of each subpixel (SPr, SPg, SPb) increases, thereby increasing the lifespan at high brightness, and thus a high-brightness display may be implemented.

[0073] Fig. 2 is a cross-sectional view illustrating an organic light-emitting display device according to a first embodiment. Fig. 2 may be a cross-sectional view taken along line A-A' in Fig. 1.

[0074] Although not shown, the region between the plurality of green subpixels (SPg) and the plurality of red subpixels (SPr) in the first direction (X) or the region between the plurality of green subpixels (SPg) and the plurality of green subpixels (SPg) in the first direction (X) may also have a structure identical to or similar to the region between the plurality of red subpixels (SPr) and the plurality of green subpixels (SPg) in the first direction (X) illustrated in FIG. 2.

[0075] As illustrated in FIGS. 1 and 2, a first protrusion (124) may be disposed on the substrate (110) between a red subpixel (SPr) and a green subpixel (SPg) in the first direction (X). The first protrusion (124) may be disposed long along the second direction (Y) between the red subpixel (SPr) and the green subpixel (SPg) in the first direction (X), but is not limited thereto.

[0076] The left and right sides of the first protrusion (124) may have shapes that are symmetrical with respect to the center normal of the first protrusion (124). As will be explained later, this may be because the roof layer (163) and the pillar layer (162) are formed in a single photolithography process.

[0077] The first protrusion (124) may have a plurality of first undercut structures (124a, 124b). For example, the plurality of first undercut structures (124a, 124b) may be formed on the side of the first protrusion (124).

[0078] The first protrusion (124) may include a pillar layer (162) and a roof layer (163) on the pillar layer (162).

[0079] A plurality of first undercut structures (124a, 124b) can be formed by the pillar layer (162) and the roof layer (163).

[0080] In order to form a plurality of first undercut structures (124a, 124b), the pillar layer (162) and the roof layer (163) may be formed of materials having different etching selectivities or etching rates. For example, the pillar layer (162) may include a material having a high etching rate, and the roof layer (163) may include a material having a low etching rate. Accordingly, when the pillar layer (162) and the roof layer (163) are etched after a photosensitive pattern is formed on the roof layer (163), the side of the pillar layer (162) is etched faster than the side of the roof layer (163), so that a plurality of first undercut structures (124a, 124b) may be formed on the side of the first protrusion (124). That is, by the side of the pillar layer (162) entering inwardly of the first protrusion (124) from the side of the roof layer (163), a plurality of first undercut structures (124a, 124b) can be formed.

[0081] The plurality of first undercut structures (124a, 124b) may have a cave shape. For example, the plurality of first undercut structures (124a, 124b) may have a U-shaped dongle shape. Accordingly, the first undercut structures (124a, 124b) may be referred to as caves, U-caves, cave sections, etc.

[0082] The pillar layer (162) may be made of an inorganic insulating material. As the inorganic insulating material, a silicon oxide series material or a silicon nitride series material may be used.

[0083] The roof layer (162) may be made of metal, inorganic insulating material, etc. As the metal, titanium (Ti), molybdenum (Mo), molybdenum-titanium (MoTi), aluminum (Al), copper (Cu), alloys thereof, etc. may be used. As the inorganic insulating material, silicon oxide series material or silicon nitride series material may be used.

[0084] Meanwhile, a red organic light-emitting element (120r) may be placed on a substrate (110) in a red subpixel (SPr), and a green organic light-emitting element (120g) may be placed on a substrate (110) in a green subpixel (SPg).

[0085] The red organic light-emitting element (120r) may include a red anode electrode (121r), a red organic light-emitting layer (122r), a red cathode electrode (123r), etc. The green organic light-emitting element (120g) may include a green anode electrode (121g), a green organic light-emitting layer (122g), a green cathode electrode (123g), etc.

[0086] The red anode electrode (121r) and the green anode electrode (121g) may be formed first before the first protrusion (124) is formed. That is, a conductive film may be formed and patterned on the substrate (110), so that the red anode electrode (121r) and the green anode electrode (121g) may be formed. The red anode electrode (121r) and the green anode electrode (121g) may be spaced apart from each other by a minimum distance (D1) so that an electrical short circuit does not occur. Thereafter, the first protrusion (124) may be formed on the substrate (110) between the red subpixel (SPr) and the green subpixel (SPg).

[0087] As described above, the first protrusion (124) may include a pillar layer (162) and a roof layer (163). To form a plurality of first undercut structures (124a, 124b), the width (W1) of the pillar layer (162) may be smaller than the width of the roof layer (163). In this case, the side of the pillar layer (162) may enter the inside of the first protrusion (124) from the side of the roof layer (163) and be positioned within the plurality of first undercut structures (124a, 124b).

[0088] Using a deposition process, a green organic light-emitting layer (122g) and a green cathode electrode (123g) are deposited on a substrate (110), and a first inorganic insulating layer (135-1) is formed on the green cathode electrode (123g), and then the first inorganic insulating layer (135-1), the green cathode electrode (123g), and the green organic light-emitting layer (122g) are patterned together to form a green subpixel (SPg).

[0089] Using a deposition process, a red organic light-emitting layer (122r) and a red cathode electrode (123r) are deposited on a substrate (110), and a second inorganic insulating layer (135-2) is formed on the red cathode electrode (123r). Then, the second inorganic insulating layer (135-2), the red cathode electrode (123r), and the red organic light-emitting layer (122r) are patterned together to form a red subpixel (SPr).

[0090] According to an embodiment, the green organic light-emitting layer (122g) and the red organic light-emitting layer (122r) may each be in contact with the side of the pillar layer (162). The width (W1) of the pillar layer (162) may become smaller, and the green organic light-emitting layer (122g) and the red organic light-emitting layer (122r) may each be in contact with the side of the pillar layer (162). Accordingly, the contact area between the green anode electrode (121g) and the green organic light-emitting layer (122g) and the contact area between the red anode electrode (121r) and the red organic light-emitting layer (122r) may increase. Since the light-emitting area (EA) is determined by the corresponding contact area, the light-emitting area (EA) of the green subpixel (SPg) and the light-emitting area (EA) of the red subpixel (SPr) may increase. Accordingly, since the light-emitting area (EA) increases, the lifespan and brightness may increase, and the image quality may be improved.

[0091] Meanwhile, the first inorganic insulating layer (135-1) and the first organic insulating layer (141-1) may be disposed on the green organic light-emitting element (120g) in the green subpixel (SPg). For example, the first inorganic insulating layer (135-1) and the first organic insulating layer (141-1) may not be disposed on the red subpixel (SPr) or the blue subpixel (SPb), but may be disposed only on the green subpixel (SPg).

[0092] The second inorganic insulating layer (135-2) and the second organic insulating layer (141-2) may be disposed on the red organic light-emitting element (120r) in the red subpixel (SPr). The second inorganic insulating layer (135-2) and the second organic insulating layer (141-2) may not be disposed on the green subpixel (SPg) or the blue subpixel (SPb), but may be disposed only on the red subpixel (SPr).

[0093] The first inorganic insulating layer (135-1) may include two or more inorganic films (135-1a, 135-1b) each made of different materials. The second inorganic insulating layer (135-2) may include two or more inorganic films (135-2a, 135-2b) each made of different materials. For example, the first inorganic films (135-1a, 135-2a) may include SiO2 or the like, and the second inorganic films (135-1b, 135-2b) may include SiNx or the like, but this is not limited thereto.

[0094] In this way, since the first inorganic insulating layer (135-1) and the second inorganic insulating layer (135-2) each include two or more inorganic films (135-1a, 135-1b, 135-1a, 135-2a), the blocking performance against penetration of moisture, oxygen, etc. can be enhanced.

[0095] Meanwhile, a plurality of waterproof structures (125, 126-1, 126-2) may be positioned between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). A plurality of waterproof structures (125, 126-1, 126-2) may be positioned on a first protrusion (124) positioned between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X).

[0096] The plurality of waterproof structures may include a first waterproof structure (125), a plurality of second waterproof structures (126-1, 126-2), etc.

[0097] By arranging multiple waterproof structures, i.e., a first waterproof structure (125) and multiple second waterproof structures (126-1, 126-2) on the first protrusion (124), penetration of moisture, oxygen, etc. can be completely blocked.

[0098] The first waterproof structure (125) may be configured such that two or more inorganic insulating layers among a plurality of inorganic insulating layers (135-1, 135-2) are overlapped on the roof layer (163) of the first protrusion (124).

[0099] As illustrated in FIG. 2, a first inorganic insulating layer (135-1) and a second inorganic insulating layer (135-2) may be overlapped on the roof layer (163) of the first protrusion (124) disposed between the red subpixel (SPr) and the green subpixel (SPg), thereby forming a first waterproof structure (125). For example, the second inorganic insulating layer (135-2) may be disposed on the first inorganic insulating layer (135-1).

[0100] As described above, by preventing peeling of the membranes by the overlapping first waterproofing structure (125), the occurrence of progressive dark spots due to peeled foreign matter is reduced, thereby improving reliability. In addition, the penetration path of moisture, oxygen, etc. is lengthened, thereby improving reliability for high-humidity products.

[0101] A first organic insulating layer (141-1) may be disposed between the first inorganic insulating layer (135-1) and the second inorganic insulating layer (135-2) on the roof layer (163) of the first protrusion (124). In this case, since one end region of the first organic insulating layer (141-1) on the first protrusion (124) has a round surface, one end region of the second inorganic insulating layer (135-2) on the one end region of the first organic insulating layer (141-1) may also have a round surface.

[0102] As described above, a green subpixel (SPg), a red subpixel (SPr), and a blue subpixel (SPb) can be manufactured in that order. That is, a green organic light-emitting element (120g), a first inorganic insulating layer (135-1), and a first organic insulating layer (141-1) can be patterned to manufacture a green subpixel (SPg). Thereafter, a red organic light-emitting element (120r), a second inorganic insulating layer (135-2), and a second organic insulating layer (141-2) can be patterned to manufacture a red subpixel (SPr). Thereafter, as illustrated in FIG. 3, a blue organic light-emitting element (120b), a third inorganic insulating layer (135-3), and a third organic insulating layer (141-3) can be patterned to manufacture a blue subpixel (SPb).

[0103] Through this series of manufacturing processes, at least two or more inorganic insulating layers among the first inorganic insulating layer (135-1), the second inorganic insulating layer (135-2), and the third inorganic insulating layer (135-3) may be overlapped on the first protrusion (124) between the plurality of subpixels (SPr, SPg, SPb) in the first direction (X), thereby forming the first waterproof structure (125).

[0104] For example, a first inorganic insulating layer (135-1) and a third inorganic insulating layer (135-3) may be overlapped on a first protrusion between a green subpixel (SPg) and a blue subpixel (SPb), thereby forming a first waterproof structure. For example, a second inorganic insulating layer (135-2) and a third inorganic insulating layer (135-3) may be overlapped on a first protrusion between a blue subpixel (SPb) and a red subpixel (SPr), thereby forming a first waterproof structure.

[0105] For example, a first inorganic insulating layer (135-1) and a second inorganic insulating layer (135-2) may be overlapped on a first protrusion (124) between a red subpixel (SPr) and a green subpixel (SPg), thereby forming a first waterproof structure (125).

[0106] As illustrated in FIG. 2, the first waterproof structure (125) may further include an island insulating pattern (not illustrated) in addition to the first inorganic insulating layer (135-1) and the second inorganic insulating layer (135-2). The island insulating pattern may be disposed on the second inorganic insulating layer (135-2). The island insulating pattern may be formed using the same material and patterning process as the third inorganic insulating layer (135-3) formed by patterning in the blue subpixel (SPb).

[0107] Accordingly, since the first waterproof structure (125) illustrated in FIG. 2 is formed by overlapping three inorganic insulating layers including an island insulating pattern, the moisture blocking performance of moisture, oxygen, etc. can be further enhanced.

[0108] Meanwhile, a plurality of second waterproof structures (126-1, 126-2) may be arranged on the side of the first protrusion (124). A plurality of second waterproof structures (126-1, 126-2) may be arranged on a plurality of first undercut structures (124a, 124b) of the first protrusion (124).

[0109] When films containing various materials are laminated, the penetration path of moisture, oxygen, etc. can be through the interface where the organic insulating layer (141-1, 141-2) and the inorganic insulating layer (135-1, 135-2) come into contact or through the material of the organic insulating layer (141-1, 141-2) itself. Since the first waterproof structure (125) is located at the interface, oxygen, moisture, etc. can penetrate along the interface. Since the first waterproof structure (125) is formed in a structure in which the inorganic insulating layers (135-1, 135-2) overlap, the penetration path can be lengthened.

[0110] Even if moisture, oxygen, etc. penetrate through the first waterproof structure (125), the second waterproof structure (126-1, 126-2) may have an area without an interface where the organic insulating layer (141-1, 141-2) and the inorganic insulating layer (135-1, 135-2) come into contact. Accordingly, moisture, oxygen, etc. may be completely blocked by the second waterproof structure (126-1, 126-2). For example, the area without an interface may be the lower side of the roof layer (163) and / or the side of the pillar layer (162).

[0111] The interface may be a barrier portion of a waterproof structure that can be secured when the deposition is performed at a greater angle than a predetermined deposition angle with respect to the horizontal plane of the substrate (110) due to the angle limiting plate of the evaporation source during the deposition process. For example, when the etching depth of the lower side of the roof layer (163) is 0.5 μm and the height of the pillar layer (162) is 0.5 μm, the interface may be a barrier portion that can be secured when the deposition is performed at a deposition angle of 45° or greater.

[0112] A plurality of second waterproof structures (126-1, 126-2) can be formed by forming one inorganic insulating layer among a plurality of inorganic insulating layers (135-1, 135-2) into an inorganic film / inorganic film joint structure by a plurality of first undercut structures (124a, 124b). That is, the inorganic insulating layer is disposed on the side of the pillar layer (162) and the lower side of the roof layer (163) in the plurality of first undercut structures (124a, 124b), so that a plurality of second waterproof structures (126-1, 126-2) having an inorganic film / inorganic film joint structure can be formed.

[0113] Meanwhile, the blocking structure (136-1, 136-2) may be placed in the edge region of the first protrusion (124). The blocking structure (136-1, 136-2) may be placed in the edge region of the pillar layer (162) of the first protrusion (124).

[0114] The blocking structure (136-1, 136-2) may include at least one blocking layer (113) for forming an undercut structure that extends inward from the side of the pillar layer (162). By allowing the blocking layer (113) to extend inward from the side of the pillar layer (162), a blocking structure (136-1, 136-2) having an undercut structure may be formed. The blocking layer (113) may include a silicon-based inorganic material, a metal, or the like. As the metal, aluminum (Al), molybdenum (Mo), a molybdenum alloy, or the like may be used, but is not limited thereto.

[0115] The first protrusion (14) has not only waterproof properties but also current leakage blocking properties. Nevertheless, a blocking structure (136-1, 136-2) may be provided to double-strengthen current leakage blocking. The blocking structures (136-1, 136-2) may be formed through the same process as the blocking structures (137-1, 137-2) illustrated in FIG. 3. If the image quality is less affected by lateral leakage current, the blocking structures (137-1, 137-2) may be omitted. In this case, the blocking structures (136-1, 136-2) may also be omitted, but this is not limited thereto.

[0116] A lateral leakage current between a red subpixel (SPr) and a green subpixel (SPg) can be prevented by the blocking structure (136-1, 136-2). The lateral leakage current may be a leakage current flowing between adjacent subpixels (SPr, SPg) along the first direction (X). In addition, an electrical short between the anode electrode (121r, 121g) and the cathode electrode (123r, 123g) in the red subpixel (SPr) and the green subpixel (SPg) can be prevented by the blocking structure (136-1, 136-2). Therefore, color staining due to leakage current can be improved by using the blocking structure (136-1, 136-2).

[0117] Fig. 3 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment. Fig. 3 may be a cross-sectional view taken along line B-B' in Fig. 1. Fig. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment. Fig. 4 may be a cross-sectional view taken along line C-C' in Fig. 1.

[0118] Fig. 3 illustrates a cross-sectional structure in an area between a plurality of blue subpixels (SPb) in the second direction (Y). The cross-sectional structures in an area between a plurality of red subpixels (SPr) in the second direction (Y) and an area between a plurality of green subpixels (SPg) in the second direction (Y) may be the same as or similar to the cross-sectional structure in an area between a plurality of blue subpixels (SPb) in the second direction (Y) (Fig. 3).

[0119] As illustrated in FIGS. 1 and 3, a plurality of second protrusions (127) may be disposed on the substrate (110) between a plurality of blue subpixels (SPb) in the second direction (Y), or at least between the non-display area (NAA) and the display area (AA). The second protrusions (127) may be provided in the form of a plurality of dummy pixels (SPrd, SPgd, SPbd) in the non-display area (NAA) which is vulnerable to waterproofing, so that the waterproof function may be enhanced when patterning by color. The form of the pattern may be provided in the first direction (X) or in the first direction (X) and the second direction (Y).

[0120] The second protrusion (127) may have a plurality of second undercut structures (127a, 127b). For example, the plurality of second undercut structures (127a, 127b) may be formed on the side of the second protrusion (127).

[0121] The second protrusion (127) may include a pillar layer (162) and a roof layer (163). The second protrusion (127) including the pillar layer (162) and the roof layer (163) may have the same shape as the first protrusion (124) illustrated in FIG. 2.

[0122] A connection structure (130-1, 130-2) linked to the structure of the second protrusion (127) can be arranged between a plurality of sub-pixels (SPr, SPg, SPb) in the form of stripes of the same color. Although there are differences depending on the product, when the screen size is 8” or more in terms of diagonal, the connection structure (130-1, 130-2) can be used to connect the auxiliary electrode and the first power wire between the manufacturing processes, thereby improving the uniformity of the brightness of the screen.

[0123] As illustrated in Fig. 4, subpixels (SPb) of the same color can be distinguished by a pillar layer (162). In this case, the pillar layer (162) can serve as a bank.

[0124] The connection structure (130-1, 130-2) may further include a bottom layer. The bottom layer may be positioned beneath the pillar layer (162). The bottom layer may include an auxiliary electrode made of a material with excellent electrical conductivity, such as metal. Although not shown, the auxiliary electrode may be electrically connected to a first power line to which a first potential voltage is supplied.

[0125] Meanwhile, as illustrated in FIG. 4, a pillar layer (162) having a bank function may be disposed below the second protrusion (127) between a plurality of subpixels (SPb) in the second direction (Y). A third inorganic insulating layer (135-3) and a third organic insulating layer (141-3) may be disposed on a plurality of green subpixels (SPg) and a plurality of second protrusions (127) in the second direction (Y). That is, an inorganic film and an organic film may be formed and patterned on the substrate (110), so that the third inorganic insulating layer (135-3) and the third organic insulating layer (141-3) may be disposed on a plurality of green subpixels (SPg) and a plurality of second protrusions (127) in the second direction (Y).

[0126] As illustrated in FIG. 3, a plurality of third waterproof structures (128-1, 128-2) may be arranged on the side of the second protrusion (127). A plurality of third waterproof structures (128-1, 128-2) may be arranged on a plurality of second undercut structures (127a, 127b) of the second protrusion (127).

[0127] By forming the third inorganic insulating layer (135-3) with a bonding structure of an inorganic film / inorganic film by a plurality of second undercut structures (127a, 127b), a plurality of third waterproof structures (128-1, 128-2) can be formed. That is, the third inorganic insulating layer (135-3) is arranged on the side of the pillar layer (162) and the lower side of the roof layer (163) in the plurality of second undercut structures (127a, 127b), so that a plurality of third waterproof structures (128-1, 128-2) having a bonding structure of an inorganic film / inorganic film can be formed.

[0128] For example, the 3-1 waterproof structure (128-1) may be configured such that the 3rd inorganic insulating layer (135-3) is formed into an inorganic film / inorganic film bonding structure by the 2-1 undercut structure (127a). For example, the 3-2 waterproof structure (128-2) may be configured such that the 3rd inorganic insulating layer (135-3) is formed into an inorganic film / inorganic film bonding structure by the 2-2 undercut structure (127b).

[0129] Since the plurality of third waterproof structures (128-1, 128-2) have a bonding structure of an inorganic membrane / inorganic membrane, the penetration path of moisture, oxygen, etc. increases, so the penetration blocking performance can be further enhanced.

[0130] Meanwhile, the blocking structure (137-1, 137-2) may be placed in the edge region of the second protrusion (127). The blocking structure (137-1, 137-2) may be placed in the edge region of the pillar layer (162) of the second protrusion (127).

[0131] The blocking structure (137-1, 137-2) may include at least one blocking layer (113) for forming an undercut structure that extends inward from the side of the pillar layer (162). By allowing the blocking layer (113) to extend inward from the side of the pillar layer (162), a blocking structure (137-1, 137-2) having an undercut structure may be formed.

[0132] An electrical short between the blue anode electrode (121b) and the blue cathode electrode (123b) in the blue subpixel (SPb) can be prevented by the blocking structure (137-1, 137-2). Therefore, by using the blocking structure (137-1, 137-2), malfunctions in operation or light emission due to an electrical short between the blue anode electrode (121b) and the blue cathode electrode (123b) can be prevented, thereby increasing product reliability.

[0133] Meanwhile, as illustrated in FIG. 4, among a plurality of blue subpixels (SPb) in the second direction (Y), the second protrusion (127), the connection structure (130-1, 130-2), the third waterproof structure (128-1, 128-2), etc. may not be arranged between some of the blue subpixels (SPb).

[0134] As illustrated in FIGS. 1 and 4, a plurality of blue subpixels (SPb) in the second direction (Y) may be arranged on the entire area of ​​the stripe pattern of the same color. The second protrusion (127), the connection structures (130-1, 130-2), the third waterproof structures (128-1, 128-2), etc. may be arranged in units of three blue subpixels or three row lines along the second direction (Y) of the stripe pattern.

[0135] As illustrated in FIG. 4, since the second protrusion (127), the connection structure (130-1, 130-2), the third waterproof structure (128-1, 128-2), etc. are not arranged, the blue organic light-emitting layer (122b) or the blue cathode electrode (123b) arranged on the pillar layer (162) can be continuously connected to the adjacent blue subpixel (SPb) without interruption.

[0136] Meanwhile, the blocking structures (138-1, 138-2) may be arranged at the edge region of the pillar layer (162). The blocking structures (138-1, 138-2) may be formed through the same process as the blocking structures (136-1, 136-2, 137-1, 137-2) formed at the edge region of the pillar layer (162) of the first protrusion (124) illustrated in FIG. 2 or the pillar layer (162) of the second protrusion (127) illustrated in FIG. 3, but are not limited thereto.

[0137] FIG. 5 is a plan view schematically illustrating an organic light-emitting display device according to a second embodiment.

[0138] The second embodiment is the same as the first embodiment (Fig. 1) except that the width (W2) between the light-emitting areas (EA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) is increased.

[0139] As will be explained later, a plurality of first banks may be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). Since the width of the first bank is greater than the width of the pillar layer of the first protrusion, the light-emitting area (EA) of the corresponding subpixel (SPr, SPg, SPb) may be reduced due to the increase in the width of the first bank. Accordingly, in the second embodiment (Fig. 5), the width (W2) between the light-emitting areas (EA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) may be greater than the width (W1) between the light-emitting areas (EA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) in the first embodiment (Fig. 1).

[0140] Fig. 6 is a cross-sectional view illustrating an organic light-emitting display device according to a fourth embodiment. Fig. 7 is a cross-sectional view illustrating an organic light-emitting display device according to a fifth embodiment. Figs. 6 and 7 are cross-sectional views taken along lines A-A' and B-B' of Fig. 5, respectively.

[0141] As illustrated in FIG. 1, FIG. 6, and FIG. 7, a plurality of first banks (111-1) may be arranged on a substrate (110) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and a plurality of second banks (111-2) may be arranged on a substrate (110) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0142] A plurality of first protrusions (124) may be arranged on a plurality of first banks (111-1) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and a plurality of second protrusions (127) may be arranged on a plurality of second protrusions (127) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0143] Since the plurality of second banks (111-2), the plurality of first protrusions (124) and the plurality of second protrusions (127) have already been described, a detailed description thereof is omitted.

[0144] As shown in FIG. 6, the width (W2) of the first bank (111-1) may be greater than the width (W1) of the pillar layer (162) of the first protrusion (124).

[0145] A red organic light-emitting element (120r) may be arranged in a red subpixel (SPr), and a green organic light-emitting element (120g) may be arranged in a green subpixel (SPg). The red organic light-emitting element (120r) may include a red anode electrode (121r), a red organic light-emitting layer (122r), a red cathode electrode (123r), etc., and the green organic light-emitting element (120g) may include a green anode electrode (121g), a green organic light-emitting layer (122g), a green cathode electrode (123g), etc.

[0146] The red anode electrode (121r) and the green anode electrode (121g) may be arranged to be spaced apart by a minimum distance (D1) so as to prevent an electrical short circuit from occurring. The width (W1) of the pillar layer (162) of the first protrusion (124) may be greater than the separation distance (D1) between the red anode electrode (121r) and the green anode electrode (121g).

[0147] The first bank (111-1) may be disposed on the red anode electrode (121r) and the green anode electrode (121g). That is, the first bank (111-1) may vertically overlap a portion of the red anode electrode (121r) and a portion of the green anode electrode (121g), respectively. In this case, the contact area between the red anode electrode (121r) and the red organic light-emitting layer (122r) and the contact area between the green anode electrode (121g) and the green organic light-emitting layer (122g) may be reduced due to the first bank (111-1).

[0148] In addition, the green organic light-emitting layer (122g) and / or the green cathode electrode (123g) may be in contact with the upper surface of one side of the first bank (111-1), and the red organic light-emitting layer (122r) and / or the red cathode electrode (123r) may be in contact with the upper surface of the other side of the first bank (111-1).

[0149] Even if the deposition material is deposited on the substrate (110) at a relatively small deposition angle, the ends of each of the red organic light-emitting layer (122r), the red cathode electrode (123r), the green organic light-emitting layer (122g), and the green cathode electrode (123g) can be formed at the entrance of the first undercut structure (124a, 124b). Accordingly, the deposition system can be very simple and the unit cost of the deposition system can be greatly reduced.

[0150] Meanwhile, the first waterproof structure (125) may be placed on the first protrusion (124), and a plurality of second waterproof structures (125, 126-1, 26-2) may be placed on the side of the first protrusion (124).

[0151] Meanwhile, although not shown, as shown in FIG. 1, the cathode electrodes (123r, 123g, 123b) of each subpixel (SPr, SPg, SPb) can be electrically connected to the power wiring through a plurality of connection structures (130-1, 130-2) arranged between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0152] The connection method and connection structures can be implemented in various ways, such as laser welding, laser removal, undercut structure at the bottom of the bank, and undercut structure at the top of the bank, but are not limited thereto.

[0153] Although not shown, a blocking structure may be provided in the edge area of ​​the first bank (111-1) and / or the second bank (111-2).

[0154] 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. A plurality of subpixels having different colors along a first direction and having the same color along a second direction intersecting the first direction; A plurality of anode electrodes for the plurality of subpixels; A plurality of organic light-emitting layers on the plurality of anode electrodes; A plurality of cathode electrodes on the plurality of organic light-emitting layers; A plurality of inorganic insulating layers on the plurality of cathode electrodes; A plurality of first protrusions disposed between the plurality of subpixels in the first direction and having a plurality of first undercut structures on the side; a plurality of first waterproof structures on the plurality of first protrusions; and A plurality of second waterproof structures are included in the plurality of first undercut structures of the plurality of first protrusions; The above first waterproof structure is configured such that at least two or more inorganic insulating layers among the plurality of inorganic insulating layers are overlapped on the first protrusion. Organic light emitting display device.

2. In paragraph 1, The first protrusion includes a pillar layer and a roof layer on the pillar layer, The above first undercut structure is formed by the width of the pillar layer being smaller than the width of the roof layer, The organic light-emitting layer is disposed on the side of the pillar layer, Organic light emitting display device.

3. In paragraph 2, The width between the light-emitting areas of each of the plurality of subpixels in the first direction is the width of the pillar layer. Organic light emitting display device.

4. In paragraph 1, The second waterproof structure is configured such that one of the plurality of inorganic insulating layers is formed into an inorganic film / inorganic film bonding structure by the first undercut structure. Organic light emitting display device.

5. In paragraph 1, further comprising a plurality of second protrusions between the plurality of subpixels in the second direction; Organic light emitting display device.

6. In paragraph 5, Further comprising a plurality of third waterproof structures on the side of the plurality of second protrusions; The second protrusion includes a pillar layer and a roof layer on the pillar layer, Since the width of the above pillar layer is smaller than the width of the above roof layer, a second undercut structure is formed on the side of the above second protrusion. Organic light emitting display device.

7. In paragraph 5, Further comprising a plurality of connecting structures in the second undercut structure of the second protrusion; Organic light emitting display device.

8. In paragraph 5, further comprising a blocking structure in the edge area of ​​at least one of the first protrusion and the second protrusion; Organic light emitting display device.

9. In paragraph 1, A display area including the plurality of subpixels; A non-display area containing multiple dummy subpixels; a plurality of third protrusions extending from the plurality of first protrusions to the non-display area along the second direction; and Further comprising a plurality of third waterproof structures on the plurality of third protrusions; Organic light emitting display device.

10. In paragraph 1, Further comprising a plurality of first banks below the plurality of first protrusions; The organic light-emitting layer is disposed on the upper side of the first bank, Organic light emitting display device.

11. In paragraph 10, Further comprising a plurality of second banks between the plurality of subpixels in the second direction; The cathode electrode is continuously arranged on the second bank and on the subpixel adjacent to the second bank, Organic light emitting display device.

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