Organic light-emitting display device

Abstract

This organic light-emitting display device may comprise: a power line; a plurality of subpixels; a plurality of organic light-emitting elements in the plurality of subpixels; and a plurality of connection structures connecting a plurality of cathode electrodes of the plurality of organic light-emitting elements to the power line in the vicinity of the plurality of subpixels. The plurality of subpixels may have different colors along a first direction and the same color along a second direction intersecting the first direction.

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 purposes, an organic light-emitting display device includes: a power wiring; a plurality of subpixels; a plurality of organic light-emitting elements in the plurality of subpixels; and a plurality of connection structures connecting a plurality of cathode electrodes of the plurality of organic light-emitting elements to the power wiring around the plurality of subpixels; wherein the plurality of subpixels can have different colors along a first direction and the same color along a second direction intersecting the first direction.

[0012] The above plurality of connection structures may be arranged lengthwise along the second direction between the plurality of subpixels.

[0013] The above plurality of connection structures can be arranged between the plurality of subpixels in the second direction.

[0014] The power wiring includes a plurality of first power wirings along the first direction; and a plurality of second power wirings intersecting the plurality of first power wirings along the second direction; and the plurality of connection structures can be arranged in an intersection area of ​​the plurality of first power wirings and the plurality of second power wirings.

[0015] The organic light-emitting display device may further include a plurality of banks between the plurality of subpixels; a plurality of protrusions each including a bottom layer on the plurality of banks, a pillar layer on the bottom layer, and a roof layer on the pillar layer, wherein the protrusions may have an undercut structure formed by the bottom layer, the pillar layer, and the roof layer.

[0016] At least one layer of the bottom layer and the pillar layer is an auxiliary electrode connected to the power wiring, and the connection structure can contact the cathode electrode to the upper surface of the auxiliary electrode in the undercut structure.

[0017] The organic light-emitting display device may further include an inorganic insulating layer on the plurality of organic light-emitting elements; and a waterproof structure in the undercut structure.

[0018] The above waterproof structure can be configured such that the inorganic insulating layer is formed in a curved shape by an undercut structure.

[0019] The organic light-emitting display device further includes a blocking structure between the plurality of subpixels, and a hole injection layer or a charge generation layer of the organic light-emitting layer can be separated by the blocking structure.

[0020] According to another aspect of the embodiment, an organic light-emitting display device includes: a power wiring; a plurality of subpixels; a plurality of organic light-emitting elements in the plurality of subpixels; and a plurality of connection structures connecting a plurality of cathode electrodes of the plurality of organic light-emitting elements to the power wiring around the plurality of subpixels; wherein the plurality of subpixels may include: a plurality of first subpixels along a second direction; a plurality of second subpixels between the plurality of first subpixels in the second direction; and a plurality of third subpixels arranged in parallel with the plurality of first subpixels and the plurality of second subpixels in the second direction.

[0021] The plurality of connection structures may be arranged lengthwise along the second direction between the plurality of first subpixels and the plurality of third subpixels and between the plurality of second subpixels and the plurality of third subpixels.

[0022] The plurality of connection structures may include a plurality of first connection structures arranged longitudinally along the second direction between the plurality of first subpixels and the plurality of third subpixels and between the plurality of second subpixels and the plurality of third subpixels; and a plurality of second connection structures branching from the plurality of first connection structures in the first direction.

[0023] The plurality of connection structures may include two or more connection structures branching at a plurality of intersections between the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels.

[0024] The effects of the organic light-emitting display device according to the embodiment are described as follows.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] According to at least one of the embodiments, a plurality of connection structures may be arranged longitudinally along a second direction between a plurality of subpixels in the first direction. Accordingly, the plurality of connection structures may be arranged longitudinally in a stripe shape along the second direction and electrically connected to power wiring in a non-display area, thereby reducing process complexity.

[0029] According to at least one of the embodiments, the plurality of connection structures can commonly connect two cathode electrodes of two subpixels adjacent to each other in the first direction to the power wiring. Accordingly, the voltage of the input power can be equally applied to the subpixels regardless of their positions on the panel, thereby realizing a uniform image quality.

[0030] According to at least one of the embodiments, at least three or more subpixels share one connection structure, thereby increasing the emission area ratio (EAR), thereby improving the lifespan and brightness of the product.

[0031] According to at least one of the embodiments, two or more connection structures branching from a plurality of intersections between a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels may be arranged. Accordingly, two side portions contacting at least two corners of the cathode electrodes of each of the plurality of subpixels may be electrically connected to the first power wiring. Accordingly, the light-emitting area of ​​each of the plurality of subpixels may be increased, and the electrical contact area with respect to the cathode electrode may be increased, thereby improving the lifespan and brightness of the product.

[0032] 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.

[0033] FIG. 1 is a plan view schematically illustrating an organic light-emitting display device according to a first embodiment.

[0034] FIG. 2 is a plan view schematically illustrating an organic light-emitting display device according to a second embodiment.

[0035] FIG. 3 is a cross-sectional view illustrating an organic light-emitting display device according to the first embodiment.

[0036] Fig. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment.

[0037] Fig. 5 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment.

[0038] Fig. 6 is a cross-sectional view illustrating an organic light-emitting display device according to a fourth embodiment.

[0039] Fig. 7 is a cross-sectional view illustrating an organic light-emitting display device according to the fifth embodiment.

[0040] Fig. 8 is a plan view schematically illustrating an organic light-emitting display device according to a third embodiment.

[0041] Fig. 9 is a plan view schematically illustrating an organic light-emitting display device according to a fourth embodiment.

[0042] Fig. 10 is a plan view schematically illustrating an organic light-emitting display device according to the fifth embodiment.

[0043] Fig. 11 is a plan view schematically illustrating an organic light-emitting display device according to the sixth embodiment.

[0044] Fig. 12 is a plan view schematically illustrating an organic light-emitting display device according to the seventh embodiment.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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. Additionally, 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.

[0049] 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.

[0050] FIG. 1 is a plan view schematically illustrating an organic light-emitting display device according to a first embodiment.

[0051] 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). The non-display area (NAA) may be referred to as a bezel area.

[0052] 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 a first direction (X) and may have the same color along a second direction (Y) intersecting the first direction (X), 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.

[0053] 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 blue subpixels (SPb) emitting blue light may be arranged in a stripe shape along the second direction (Y).

[0054] 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.

[0055] 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 blue subpixel (SPb).

[0056] For example, the luminous efficiency of the blue organic light-emitting element (120b) may be lower than the luminous efficiency of the red organic light-emitting element (120r) or the green organic light-emitting element (120g). In this case, by designing the area of ​​the blue subpixel (SPb) to be larger than the area of ​​the red subpixel (SPr) or the area of ​​the green subpixel (SPg), the lifespans of the red organic light-emitting element (120r), the green organic light-emitting element (120g), and the blue organic light-emitting element (120b) can be made uniform, thereby improving the brightness of the product.

[0057] 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).

[0058] 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.

[0059] 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).

[0060] Although not shown, the organic light-emitting layer and the cathode electrode may be separated into at least two subpixel units or two or more row-line units along the second direction (Y).

[0061] The anode electrode may be disposed only within the plurality of subpixels (SPr, SPg, SPb) along the first direction (X) and the second direction (Y). That is, the anode electrode may not be disposed between the plurality of subpixels (SPr, SPg, SPb) along the first direction (X) and the second direction (Y). Accordingly, the light-emitting areas (EA) of each of the plurality of subpixels (SPr, SPg, SPb) may be distinguished by the anode electrodes individually provided in the plurality of subpixels (SPr, SPg, SPb).

[0062] Meanwhile, a power line (PL) may be arranged in a non-display area (NAA). The power line (PL) may be provided to supply a first potential voltage to a plurality of subpixels (SPr, SPg, SPb). A power terminal (101) may be electrically connected to the power line (PL) to supply a first potential voltage supplied from a power supply unit (not shown) to the plurality of subpixels (SPr, SPg, SPb).

[0063] A plurality of connection structures (124-1, 124-2, 130) may be arranged around a plurality of subpixels (SPr, SPg, SPb) in the display area (AA). The plurality of connection structures (124-1, 124-2, 130) may be the connection structures (124-1, 124-2, 130) illustrated in FIGS. 4 to 6. The plurality of connection structures (124-1, 124-2, 130) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). The plurality of connection structures (124-1, 124-2, 130) may be arranged lengthwise along the second direction (Y) between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). The plurality of connection structures (124-1, 124-2, 130) can be arranged in two subpixel units or two column line units along the first direction (X).

[0064] A plurality of connection structures (124-1, 124-2, 130) can extend from the display area (AA) to the non-display area (NAA) and be electrically connected to the power wiring. A plurality of connection structures (124-1, 124-2, 130) can electrically connect a plurality of cathode electrodes of a plurality of organic light-emitting elements (120r, 120g, 120b) to the power wiring in the display area (AA).

[0065] A plurality of connection structures (124-1, 124-2, 130) can be arranged in units of two subpixels or two column lines along the first direction (X). The connection structures (124-1, 124-2, 130) can be arranged between adjacent subpixels along the second direction (Y). In this case, the adjacent subpixels can share one connection structure (124-1, 124-2, 130). That is, the green subpixel (SPg) and the blue subpixel (SPb) can share one connection structure (124-1, 124-2, 130), and the red subpixel (SPr) and the green subpixel (SPg) can share one connection structure (124-1, 124-2, 130).

[0066] The plurality of connection structures (124-1, 124-2, 130) can electrically connect the cathode electrode of at least one subpixel among two subpixels adjacent in the first direction (X) to the power wiring (PL), respectively. For example, the plurality of connection structures (124-1, 124-2, 130) can electrically connect the cathode electrode of one subpixel among two subpixels adjacent in the first direction (X) to the power wiring (PL). For example, the plurality of connection structures (124-1, 124-2, 130) can commonly connect two cathode electrodes of two subpixels adjacent in the first direction (X) to the power wiring (PL), respectively.

[0067] 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.

[0068] Each of the plurality of subpixels (SPr, SPg, SPb) may include a driving circuit including a driving transistor, etc.

[0069] When a specific subpixel is selected by a scan transistor responding to a scan signal, light having a brightness corresponding to the current flowing in the driving transistor can be emitted from the specific subpixel using a first potential voltage of a power wire (PL) and a second potential voltage of another power wire.

[0070] Meanwhile, multiple waterproof structures, multiple blocking structures, etc. may be arranged between multiple subpixels (SPr, SPg, SPb).

[0071] A plurality of blocking structures may be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X) and / or the second direction (Y).

[0072] 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.

[0073] A lateral leakage current or a longitudinal leakage current between a plurality of subpixels (SPr, SPg, SPb) can be prevented by a 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 an anode electrode and a cathode electrode in the corresponding subpixels (SPr, SPg, SPb) can be prevented by the blocking structure. Therefore, by using the blocking structure, color staining caused by leakage current can be improved, thereby improving image quality.

[0074] A plurality of waterproof structures may be arranged in the non-display area (NAA) and the display area (AA). For example, the plurality of waterproof structures may be arranged between the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) and / or the second direction (Y) in the non-display area (NAA) and the display area (AA). The plurality of waterproof structures may be arranged in the non-emission area (NEA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) and / or the second direction (Y).

[0075] 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.

[0076] However, a plurality of waterproof structures such as the embodiment can prevent moisture, oxygen, etc. from penetrating into the non-display area (NAA) or the display area (AA), thereby preventing malfunctions or light emission failures of the plurality of subpixels (SPr, SPg, SPb). Accordingly, the organic light-emitting layer of each subpixel (SPr, SPg, SPb) is not affected by moisture, oxygen, etc., so reliability can be dramatically improved.

[0077] According to an embodiment, a plurality of connection structures (124-1, 124-2, 130) can be arranged lengthwise along a second direction (Y) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). Accordingly, the plurality of connection structures (124-1, 124-2, 130) can be arranged lengthwise in a stripe shape along the second direction (Y) and electrically connected to a power wiring (PL) on a non-display area (NAA), thereby reducing the complexity of the process.

[0078] According to an embodiment, a plurality of connection structures (124-1, 124-2, 130) can commonly connect two cathode electrodes of two subpixels adjacent to each other in the first direction (X) to a power line (PL). Accordingly, the voltage of the input power can be equally applied to the subpixels regardless of the position of the panel, thereby realizing a uniform image quality.

[0079] FIG. 2 is a plan view schematically illustrating an organic light-emitting display device according to a second embodiment.

[0080] The second embodiment is identical to the first embodiment (Fig. 1) except for the power wiring (PL1 to PL3) and the connection structure (124-1, 124-2, 130). In the second embodiment, components having the same shape, structure, and / or function as those in the first embodiment are given the same drawing reference numerals, and a detailed description thereof is omitted.

[0081] As illustrated in FIG. 2, a plurality of power wires (PL1 to PL3) may be provided to supply a first potential voltage to a plurality of subpixels (SPr, SPg, SPb).

[0082] Multiple power wires (PL1 to PL3) can be placed in the non-display area (NAA) and the display area (AA).

[0083] Power wires (PL1, PL2) are arranged between a plurality of subpixels (SPr, SPg, SPb) in the display area (AA) and can be electrically connected to the plurality of subpixels (SPr, SPg, SPb). The power wires (PL1, PL2) can be electrically connected to a plurality of cathode electrodes of a plurality of organic light-emitting elements (120r, 120g, 120b) provided in the plurality of subpixels (SPr, SPg, SPb) through a plurality of connection structures (124-1, 124-2, 130).

[0084] A plurality of first power wires (PL1) and a plurality of second power wires (PL2) may intersect and be connected to each other. The plurality of first power wires (PL1) and the plurality of second power wires (PL2) may have a matrix structure. The third power wire (PL3) may be arranged in a non-display area (NAA) and may be electrically connected to, for example, the plurality of second power wires (PL2). The second power wire (PL2) may be omitted. When the second power wire (PL2) is omitted, the first power wire (PL1) may be electrically connected to the third power wire (PL3).

[0085] A plurality of connection structures (124-1, 124-2, 130) can be arranged between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0086] A plurality of connection structures (124-1, 124-2, 130) can electrically connect a second power wire (PL2) arranged between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y) to a plurality of cathode electrodes of a plurality of organic light-emitting elements (120r, 120g, 120b) of a plurality of subpixels (SPr, SPg, SPb).

[0087] A plurality of connection structures (124-1, 124-2, 130) can be locally formed in a dot shape between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0088] As an example, a plurality of connection structures (124-1, 124-2, 130) may be formed in grooves each formed in a dot shape. A laser ablation process or a laser welding process may be used to electrically connect the first power wire (PL1) to a plurality of cathode electrodes of the plurality of organic light-emitting elements (120r, 120g, 120b) in the grooves.

[0089] A plurality of connection structures (124-1, 124-2, 130) may be arranged between a plurality of subpixels (SPr, SPg, SPb) along the second direction (Y), but may be arranged in two or more row line units or two or more subpixel units along the second direction (Y).

[0090] In this case, the number of shots of the laser beam in the second direction (Y) may vary depending on the size of the panel. That is, as the size of the panel increases, the number of shots of the laser beam in the second direction (Y) may increase. For example, in a panel of 8” or larger, the laser welding process may be performed in a connection structure (124-1, 124-2, 130) of 5 points or more per line of the stripe pattern in order to improve brightness reduction in the center of the panel. For example, in a panel of 20” or larger, the laser welding process may be performed in a connection structure (124-1, 124-2, 130) of 20 points or more per line of the stripe pattern.

[0091] As another example, a plurality of connection structures (124-1, 124-2, 130) may be formed on the side of each protrusion. That is, by depositing the organic light-emitting layer and the cathode electrode at different deposition angles in the undercut structure formed on the side of the protrusion, the cathode electrode may be electrically connected to the auxiliary electrode included in the protrusion.

[0092] Fig. 3 is a cross-sectional view illustrating an organic light-emitting display device according to a first embodiment. Fig. 3 may be a cross-sectional view taken along line A-A' in Fig. 2. Fig. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment. Fig. 4 is an example of a cross-sectional view taken along line B-B' in Fig. 2.

[0093] As illustrated in FIGS. 2 to 4, the organic light-emitting display device according to the embodiment may include a plurality of banks (111-1, 111-2), a plurality of power wires (PL1 to PL3), a plurality of organic light-emitting elements (120r, 120g, 120b), a plurality of connection structures (130), etc.

[0094] A plurality of banks (111-1, 111-2), a plurality of power wires (PL1 to PL3), a plurality of organic light-emitting elements (120r, 120g, 120b), and a plurality of connection structures (130) can be arranged on a substrate (110).

[0095] An interlayer insulating layer (103) may be disposed on a substrate (110), and a plurality of banks (111-1, 111-2), a plurality of organic light-emitting elements (120r, 120g, 120b), and a plurality of connection structures (130) may be disposed on the interlayer insulating layer (103).

[0096] A plurality of driving circuits may be formed on the substrate (110). The plurality of driving circuits may be provided in each of the plurality of subpixels (SPr, SPg, SPb). The plurality of driving circuits may include a plurality of transistors, at least one capacitor, etc. The plurality of transistors may include a scan transistor, a driving transistor, a sensing transistor, etc.

[0097] The interlayer insulating layer (103) may be disposed on a plurality of driving circuits. The interlayer insulating layer (103) may be a planarizing layer. For this purpose, the upper surface of the interlayer insulating layer (103) may have a flat surface.

[0098] A plurality of banks (111-1, 111-2) may be arranged between a plurality of subpixels (SPr, SPg, SPb).

[0099] The plurality of banks may include a plurality of first banks (111-1) and a plurality of second banks (111-2). The first banks (111-1) and the second banks (111-2) may intersect and be connected to each other. The plurality of first banks (111-1) and the plurality of second banks (111-2) may have a matrix structure.

[0100] A plurality of first banks (111-1) may be arranged to correspond to a plurality of first power wires (PL1), and a plurality of second banks (111-2) may be arranged to correspond to a plurality of second power wires (PL2). That is, a plurality of first banks (111-1) may be arranged on a plurality of first power wires (PL1), and a plurality of second banks (111-2) may be arranged on a plurality of second power wires (PL2).

[0101] A plurality of first banks (111-1) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y), and a plurality of second banks (111-2) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). A plurality of first banks (111-1) may be arranged long along the first direction (X) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y), and a plurality of second banks (111-2) may be arranged long along the second direction (Y) between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X).

[0102] For example, a plurality of light-emitting areas (EA) may be separated by a plurality of first banks (111-1) and a plurality of second banks (111-2). The plurality of light-emitting areas (EA) may be surrounded by a plurality of first banks (111-1) and a plurality of second banks (111-2).

[0103] As another example, a plurality of light-emitting areas (EA) can be separated by a plurality of anode electrodes (121r, 121g, 121b) individually provided in a plurality of subpixels (SPr, SPg, SPb). The plurality of anode electrodes (121r, 121g, 121b) are arranged only within the plurality of subpixels (SPr, SPg, SPb) and are not arranged between the plurality of subpixels (SPr, SPg, SPb).

[0104] As another example, the light-emitting area (EA) may be defined by the organic light-emitting layers (122r, 122g, 122b) exposed by the first bank (111-1) and the second bank (111-2). Since light is emitted only in the area of ​​the exposed organic light-emitting layers (122r, 122g, 122b) among the organic light-emitting layers (122r, 122g, 122b), the light-emitting area (EA) may be defined by the first bank (111-1) and the second bank (111-2).

[0105] Each of the subpixels (SPr, SPg, SPb) may include an emitting area (EA) and a non-emitting area (NEA). The area corresponding to the bank (111-1, 111-2) may be defined as the non-emitting area (NEA). In this case, the bank (111-1, 111-2) may be shared by adjacent subpixels (SPr, SPg, SPb). That is, a part of the bank (111-1, 111-2) may be included in one subpixel, and another part of the bank (111-1, 111-2) may be included in another subpixel adjacent to one subpixel.

[0106] A plurality of organic light-emitting elements (120r, 120g, 120b) may be arranged in a plurality of sub-pixels (SPr, SPg, SPb), respectively. The plurality of organic light-emitting elements (120r, 120g, 120b) may include a plurality of anode electrodes (121r, 121g, 121b), a plurality of organic light-emitting layers (122r, 122g, 122b), and a plurality of cathode electrodes (123r, 123g, 123b).

[0107] The anode electrodes (121r, 121g, 121b) may be disposed only in the respective subpixels (SPr, SPg, SPb) along the first direction (X) and the second direction (Y). The red anode electrode (121r) may be disposed only in the plurality of red subpixels (SPr) along the second direction (Y), the green anode electrode (121g) may be disposed only in the plurality of green subpixels (SPg) along the second direction (Y), and the blue anode electrode (121b) may be disposed only in the plurality of blue subpixels (SPb) along the second direction (Y).

[0108] The organic light-emitting layers (122r, 122g, 122b) may be separated from each other along the first direction (X) but may be arranged continuously along the second direction (Y). The red organic light-emitting layer (122r) may be arranged continuously in a plurality of red subpixels (SPr) as well as a plurality of first banks (111-1) along the second direction (Y). The green organic light-emitting layer (122g) may be arranged continuously in a plurality of green subpixels (SPg) as well as a plurality of first banks (111-1) along the second direction (Y). The blue organic light-emitting layer (122b) may be arranged continuously in a plurality of subpixels (SPr, SPg, SPb) as well as a plurality of first banks (111-1) along the second direction (Y). The red organic light-emitting layer (122r), the green organic light-emitting layer (122g), and the blue organic light-emitting layer (122b) may be referred to as the first organic light-emitting layer, the second organic light-emitting layer, and the third organic light-emitting layer, respectively.

[0109] The cathode electrodes (123r, 123g, 123b) may be arranged separately from each other along the first direction (X) but continuously along the second direction (Y). The red cathode electrode (123r) may be arranged continuously in a plurality of subpixels (SPr, SPg, SPb) as well as in a plurality of first banks (111-1) along the second direction (Y). The green cathode electrode (123g) may be arranged continuously in a plurality of green subpixels (SPg) as well as in a plurality of first banks (111-1) along the second direction (Y). The blue cathode electrode (123b) may be arranged continuously in a plurality of subpixels (SPr, SPg, SPb) as well as in a plurality of first banks (111-1) along the second direction (Y). The red cathode electrode (123r), the green cathode electrode (123g), and the blue cathode electrode (123b) may be referred to as the first cathode electrode, the second cathode electrode, and the third cathode electrode, respectively.

[0110] A plurality of connection structures (130) may be arranged in a plurality of first banks (111-1). Although the drawing illustrates that the connection structures (130) are arranged in all of the plurality of first banks (111-1), they may not be arranged in all of the plurality of first banks (111-1). That is, the connection structures (130) may be arranged in some of the first banks (111-1) among the plurality of first banks (111-1).

[0111] A plurality of first banks (111-1) may have a plurality of first grooves (131-1). The first grooves (131-1) may be locally formed in a portion of the first bank (111-1) between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y). The first grooves (131-1) may have a circular or rectangular shape when viewed from above, but are not limited thereto. The first grooves (131-1) may be formed by penetrating from the upper surface to the lower surface in the center of the first bank (111-1), but are not limited thereto.

[0112] As illustrated in FIG. 4, the connection structure (130) can be placed in the first groove (131-1) of the first bank (111-1). The connection structure (130) can electrically connect the green cathode electrode (123g) to the first power wire (PL1) in the first groove (131-1) of the first bank (111-1).

[0113] The connection structure (130) may include a lower electrode (130-1) and an upper electrode (130-2).

[0114] The lower electrode (130-1) may be formed by extending from the first power wire (PL1). Among the first power wires (PL1) arranged lengthwise along the first direction (X), the first power wire (PL1) corresponding to the first groove (131-1) of the first bank (111-1) may be formed as the lower electrode (130-1). Accordingly, the lower electrode (130-1) may be a part of the first power wire (PL1). The width of the lower electrode (130-1) may be greater than the width of the first power wire (PL1), but is not limited thereto.

[0115] The upper electrode (130-2) may be placed on the lower electrode (130-1). The lower surface of the upper electrode (130-2) may be in contact with the upper surface of the lower electrode (130-1). The upper electrode (130-2) may include the same material as the green anode electrode (121g).

[0116] The green cathode electrode (123g) can be electrically connected to the first power wire (PL1) via a connection structure (130). For this purpose, the green cathode electrode (123g) can be in contact with the upper surface of the upper electrode (130-2) of the connection structure (130).

[0117] A first groove (104) may also be formed in the interlayer insulating layer (103) corresponding to the first groove (131-1) of the first bank (111-1). The lower electrode (130-1) may be exposed by the first groove (104) of the interlayer insulating layer (103), and the upper electrode (130-2) may be disposed on the exposed lower electrode (130-1). In addition, the upper electrode (130-2) may be exposed by the first groove (131-1) of the first bank (111-1), and the green cathode electrode (123g) may be disposed on the exposed upper electrode (130-2).

[0118] After a green organic light-emitting layer (122g) is deposited on the upper electrode (130-2), the green organic light-emitting layer (122g) is removed to expose the upper electrode (130-2), and a green cathode electrode (123g) may be formed on the exposed upper electrode (130-2). If the green organic light-emitting layer (122g) is not completely removed, unremoved particles of the green organic light-emitting layer (122g), i.e., residual particles or lumps, may be disposed on the upper surface of the upper electrode (130-2). In this case, the green cathode electrode (123g) may contact the upper surface of the upper electrode (130-2) of the connection structure (130) through the residual particles or lumps.

[0119] Meanwhile, although not shown, the first grooves (131-1, 104) are not formed in the remaining area except for the connection structure (130) between the plurality of green subpixels (SPg) in the second direction (Y). That is, since the first grooves (131-1, 104) are not formed in the interlayer insulating layer (103) and the first bank (111-1), the upper surface of the interlayer insulating layer (103) and the upper surface of the first bank (111-1) can have a flat plane. Accordingly, the green organic light-emitting layer (122g), the green cathode electrode (123g), etc. on the first bank (111-1) can be formed to be continuously connected to the adjacent green subpixels (SPg) without a break.

[0120] Meanwhile, a plurality of second banks (111-2) may be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). The plurality of second banks (111-2) may be arranged lengthwise along the second direction (Y). A plurality of second grooves (131-2) may be formed in the plurality of second banks (111-2). The plurality of second grooves (131-2) may be formed lengthwise along the second direction (Y). The second grooves (131-2) may be formed to penetrate from the upper surface to the lower surface at the center of the second bank (111-2), but are not limited thereto.

[0121] A second groove (105) may also be formed in the interlayer insulating layer (103) corresponding to the second groove (131-2) of the second bank (111-2). The second power wiring (PL2) may be exposed by the second groove (105) of the interlayer insulating layer (103).

[0122] Meanwhile, as illustrated in FIGS. 2 to 4, the organic light-emitting display device according to the embodiment may include a plurality of inorganic insulating layers (135-1 to 135-5), a plurality of organic insulating layers (141-1 to 141-4), a plurality of waterproof structures (143, 144, 145), etc.

[0123] The plurality of inorganic insulating layers may include a first inorganic insulating layer (135-1), a second inorganic insulating layer (135-2), a third inorganic insulating layer (135-3), a fourth inorganic insulating layer (135-4), and a fifth inorganic insulating layer (135-5). The first inorganic insulating layer (135-1), the second inorganic insulating layer (135-2), the third inorganic insulating layer (135-3), the fourth inorganic insulating layer (135-4), and the fifth inorganic insulating layer (135-5) may each include at least one inorganic insulating film.

[0124] The first inorganic insulating layer (135-1) may be disposed on the green cathode electrode (123g) of the green organic light-emitting element (120g) in the green subpixel (SPg), the second inorganic insulating layer (135-2) may be disposed on the red cathode electrode (123r) of the red organic light-emitting element (120r) in the red subpixel (SPr), and the third inorganic insulating layer (135-3) may be disposed on the blue cathode electrode (123b) of the blue organic light-emitting element (120b) in the blue subpixel (SPb).

[0125] The first inorganic insulating layer (135-1), the second inorganic insulating layer (135-2), and the third inorganic insulating layer (135-3) may each be formed as a double layer including a silicon oxide layer and a silicon nitride layer. The silicon nitride layer may be disposed on the silicon oxide layer. For example, the silicon oxide layer may be formed using an atomic layer deposition (ALD) process, and the silicon nitride layer may be formed using a chemical vapor deposition (CVD) process.

[0126] The fourth inorganic insulating layer (135-4) and the fifth inorganic insulating layer (135-5) may be disposed on the entire area of ​​the substrate (110). The fourth inorganic insulating layer (135-4) and the fifth inorganic insulating layer (135-5) may be formed of a silicon nitride series using a PECVD process, but are not limited thereto. At least one of the fourth inorganic insulating layer (135-4) and the fifth inorganic insulating layer (135-5) may be omitted.

[0127] Accordingly, by arranging multiple inorganic insulating layers (135-1 to 135-5) in each of multiple subpixels (SPr, SPg, SPb) or over the entire area of ​​the substrate (110), penetration of moisture, oxygen, etc. can be completely blocked.

[0128] The plurality of organic insulating layers may include a first organic insulating layer (141-1), a second organic insulating layer (141-2), a third organic insulating layer (141-3), and a fourth organic insulating layer (141-4).

[0129] The first organic insulating layer (141-1) may be disposed on the first inorganic insulating layer (135-1) in the green subpixel (SPg), the second organic insulating layer (141-2) may be disposed on the second inorganic insulating layer (135-2) in the red subpixel (SPr), and the third organic insulating layer (141-3) may be disposed on the third inorganic insulating layer (135-3) in the blue subpixel (SPb).

[0130] The fourth organic insulating layer (141-4) can be placed on the fifth inorganic insulating layer (135-5) formed over the entire area of ​​the substrate (110).

[0131] The first organic insulating layer (141-1), the second organic insulating layer (141-2), and the third organic insulating layer (141-3) can be used as color filter layers. In this case, the first organic insulating layer (141-1), the second organic insulating layer (141-2), and the third organic insulating layer (141-3) can transmit only light of a specific wavelength band from the light emitted from each of the red organic light-emitting element (120r), the green organic light-emitting element (120g), and the blue organic light-emitting element (120b), respectively.

[0132] The first organic insulating layer (141-1), the second organic insulating layer (141-2), and the third organic insulating layer (141-3) can be used as photosensitive patterns. In this case, there is no need to form separate photosensitive patterns on the first organic insulating layer (141-1), the second organic insulating layer (141-2), and the third organic insulating layer (141-3).

[0133] The first organic insulating layer (141-1), the second organic insulating layer (141-2), and the third organic insulating layer (141-3) may be omitted, or the fourth organic insulating layer (141-4) may be omitted.

[0134] Meanwhile, a plurality of waterproof structures (143, 144, 145) may be arranged in a second bank (111-2) positioned between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). A plurality of waterproof structures (143, 144, 145) may be arranged in a second groove (131-2) of the second bank (111-2).

[0135] The plurality of waterproof structures may include a first waterproof structure (143), a second waterproof structure (144), a third waterproof structure (145), etc.

[0136] By arranging a plurality of waterproof structures, namely, a first waterproof structure (143), a second waterproof structure (144), and a third waterproof structure (145) in the second groove (131-2) of the second bank (111-2), penetration of moisture, oxygen, etc. can be completely blocked.

[0137] The first waterproof structure (143) may be configured such that two or more inorganic insulating layers among a plurality of inorganic insulating layers (135-1 to 135-5) are overlapped on the second bank (111-2).

[0138] As illustrated in FIG. 3, a second inorganic insulating layer (135-2) and a third inorganic insulating layer (135-3) may be overlapped in a second groove (131-2) of a second bank (111-2) disposed between a red subpixel (SPr) and a blue subpixel (SPb), thereby forming a first waterproof structure (143). For example, the third inorganic insulating layer (135-3) may be disposed on the second inorganic insulating layer (135-2).

[0139] The second organic insulating layer (141-2) may be disposed between the third inorganic insulating layer (135-3) and the second inorganic insulating layer (135-2). In this case, the second organic insulating layer (141-2) may have a round surface. Accordingly, the third inorganic insulating layer (135-3) disposed on the second organic insulating layer (141-2) may each have a round surface.

[0140] The fourth organic insulating layer (141-4) may be a planarizing layer having a flat upper surface.

[0141] As illustrated in FIG. 3, a plurality of second power wires (PL2) may be arranged under a plurality of second banks (111-2). The plurality of second power wires (PL2) may be exposed by a plurality of second grooves (131-2) of the plurality of second banks (111-2). A first waterproof structure (143) in which at least two or more inorganic insulating layers among a plurality of inorganic insulating layers (135-1 to 135-5) are overlapped may be positioned on the plurality of second power wires (PL2).

[0142] The second power wiring (PL2) may be provided to prevent the interlayer insulating layer (103) from being excessively etched when the interlayer insulating layer (103) under the second bank (111-2) is removed to form the first undercut structure (151) and the second undercut structure (152). If there is no concern that the interlayer insulating layer (103) will be excessively etched, the second power wiring (PL2) may be omitted.

[0143] Meanwhile, the second waterproof structure (144) may be configured by forming one inorganic insulating layer among the plurality of inorganic insulating layers (135-1 to 135-5) in a curved shape by the first undercut structure (151). The third waterproof structure (145) may be configured by forming another inorganic insulating layer among the plurality of inorganic insulating layers (135-1 to 135-5) in a curved shape by the second undercut structure (152).

[0144] The first undercut structure (151) and the second undercut structure (152) can be formed on the lower side of the second bank (111-2) that is in contact with the second groove (131-2) of the second bank (111-2). The first undercut structure (151) and the second undercut structure (152) can be formed by removing the interlayer insulating layer (103) located on the lower side of the second bank (111-2) that is in contact with the second groove (131-2) of the second bank (111-2). That is, the first undercut structure (151) and the second undercut structure (152) can be formed by the side portion of the interlayer insulating layer (103) entering outward from the inner side of the second bank (111-2) that is in contact with the second groove (131-2) of the second bank (111-2).

[0145] As illustrated in FIG. 3, the first inorganic insulating layer (135-1) may be formed in a curved shape by the first undercut structure (151) to form the second waterproof structure (144). The first inorganic insulating layer (135-1) may be disposed on the lower side of the second bank (111-2) in contact with the second groove (131-2) by the first undercut structure (151) and on the side of the interlayer insulating layer (103), thereby forming the second waterproof structure (144) in a curved shape. Since the first inorganic insulating layer (135-1) is formed in a curved shape, the penetration path of moisture, oxygen, etc. may be maximized, thereby improving the waterproofing characteristics.

[0146] A third waterproof structure (145) can be formed by forming a second inorganic insulating layer (135-2) in a curved shape by the second undercut structure (152) of the second bank (111-2). The second inorganic insulating layer (135-2) is disposed on the lower side of the second bank (111-2) in contact with the second groove (131-2) by the second undercut structure (152) and on the side of the interlayer insulating layer (103), thereby forming a third waterproof structure (145) in a curved shape. Since the second inorganic insulating layer (135-2) is formed in a curved shape, the penetration path of moisture, oxygen, etc. can be maximized, thereby improving the waterproofing characteristics.

[0147] In addition, although the waterproof structure (143 to 145) of FIG. 3 has been described in detail, the waterproof structure (143 to 145) of FIG. 3 may be installed or not included. That is, the arrangement of the connection structures (124-1, 124-2, 130) of FIG. 2 may also be possible without the waterproof structure (143 to 145).

[0148] For example, in the process of patterning each subpixel (SPr, SPg, SPb), if all patterning processes after the photolithography process (development process) are performed in a dry manner, there is no wet etching, stripping, or wet cleaning, so a waterproof structure (143 to 145) as in FIG. 3 may not be included.

[0149] Meanwhile, although not shown, a blocking structure may be formed in the lower edge area of ​​the first bank (111-1) and / or the second bank (111-2). An undercut structure may be formed in the lower edge area of ​​the first bank (111-1) and / or the second bank (111-2). In this case, the blocking structure may be formed by the undercut structure.

[0150] According to an embodiment, a connection structure (130) may be arranged in a first groove (131-1) of a plurality of first banks (111-1) between a plurality of subpixels (SPr, SPg, SPb) having the same color along the second direction (Y). Accordingly, electrical connection between the cathode electrodes (123r, 123g, 123b) of the plurality of subpixels (SPr, SPg, SPb) and the first power wire (PL1) is facilitated, and a short-circuit defect is prevented, so that malfunctions or light-emitting defects of the subpixels (SPr, SPg, SPb) are prevented, thereby improving reliability. In particular, by grouping a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y) and arranging the connection structure (130) between the grouped subpixels, the number of shots of the laser beam can be drastically reduced when using a laser ablation process to be described later, so that the process time or process cost can be reduced.

[0151] According to an embodiment, a plurality of waterproof structures (143, 144, 145) are arranged in each of a plurality of second banks (111-2), so that moisture, oxygen, etc. penetrating along the second direction (Y) may not penetrate into the plurality of subpixels (SPr, SPg, SPb). Accordingly, malfunctions in operation or light emission of the subpixels (SPr, SPg, SPb) may be prevented, thereby improving reliability.

[0152] Fig. 5 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment. Fig. 5 is another example of a cross-sectional view taken along line B-B' in Fig. 2.

[0153] The third embodiment is identical to the second embodiment (Fig. 4) except for the connection structure (130). In the third embodiment, components having the same shape, structure, and / or function as those in the second embodiment are given the same drawing reference numerals, and detailed descriptions are omitted.

[0154] As illustrated in FIG. 5, a plurality of connection structures (130) can be arranged in a plurality of first banks (111-1).

[0155] The connection structure (130) may be arranged in the first groove (131-1) of the first bank (111-1). The connection structure (130) may electrically connect the green cathode electrode (123g) to the first power wire (PL1 in FIG. 1) in the first groove (131-1) of the first bank (111-1).

[0156] The green organic light-emitting layer (122g) and the green cathode electrode (123g) may be arranged across the first bank (111-1) along the second direction (Y). In this case, the green organic light-emitting layer (122g) and the green cathode electrode (123g) may be separated from the first groove (131-1) of the first bank (111-1), respectively. That is, the green organic light-emitting layer (122g) on ​​the upper side of the first bank (111-1) and the green organic light-emitting layer (122g) in the first groove (131-1) may be separated from each other. The green cathode electrode (123g) on ​​the upper side of the first bank (111-1) and the green cathode electrode (123g) in the first groove (131-1) may be separated from each other. In this case, the green cathode electrode (123g) can be electrically connected to the connection structure (130) through the green organic light-emitting layer (122g) separated from the first groove (131-1).

[0157] Although not shown, the red cathode electrode (123r) and the blue cathode electrode may each be electrically connected to the connection structure (130) in the first groove (131-1).

[0158] The undercut structure (138) may be formed on the lower side of the first bank (111-1) that contacts the first groove (131-1). For example, the undercut structure (138) may be formed such that the side of the interlayer insulating layer (103) that contacts the first groove (131-1) extends from the inner side of the first bank (111-1) toward the outer side.

[0159] The connection structure (130) may include an auxiliary electrode (132) extending from a first power wire (PL1). Among the first power wires (PL1) arranged lengthwise along the first direction (X), a first power wire (PL1) corresponding to a first groove (131-1) of a first bank (111-1) may be formed as an auxiliary electrode (132). Accordingly, the auxiliary electrode (132) may be a part of the first power wire (PL1). The width of the auxiliary electrode (132) may be greater than the width of the first power wire (PL1), but is not limited thereto.

[0160] Although FIG. 5 illustrates a plurality of connection structures (130) arranged between a plurality of green subpixels (SPg) in the second direction (Y), a plurality of connection structures (130) arranged between a plurality of red subpixels (SPr) in the second direction (Y) and a plurality of connection structures between a plurality of blue subpixels (SPb) in the second direction (Y) may also be the same as a plurality of connection structures arranged between a plurality of red subpixels (SPr).

[0161] Since the green organic light-emitting layer (122g) is cut off by the undercut structure (138), a portion of the auxiliary electrode (132) may be exposed. Accordingly, the green cathode electrode (123g) may contact a portion of the exposed auxiliary electrode (132) in the undercut structure (138). In other words, the green cathode electrode (123g) may be electrically connected to the first power wire (PL1) through the connection structure (130).

[0162] Since the undercut structure (138) disconnects the green organic light-emitting layer (122g) and brings the green cathode electrode (123g) into contact with the auxiliary electrode (132), the undercut structure (138) may also be included in the connection structure (130), but is not limited thereto.

[0163] The interlayer insulating layer (103) may have a first groove (104) corresponding to the first groove (131-1) of the first bank (111-1). The first groove (104) of the interlayer insulating layer (103) may be formed between a plurality of green subpixels (SPg) in the second direction (Y) to correspond to the first groove (131-) of the first bank (111-1).

[0164] The undercut structure (138) can be in contact with the first layer (131-1) of the first bank (111-1) and the first groove (104) of the interlayer insulating layer (103). In this case, the auxiliary electrode (132) of the connection structure (130) is exposed in the undercut structure (138), and the green cathode electrode (123g) can be in contact with a portion of the exposed auxiliary electrode (132).

[0165] Meanwhile, the blocking structure (134-1, 134-2) can be formed by an undercut structure (115, 116) formed in the lower edge area of ​​the first bank (111-1).

[0166] The blocking structure (134-1, 134-2) may include at least one blocking layer (113) for forming an undercut structure (115, 116) that extends inward from the side of the first bank (111-1). The undercut structure (115, 116) formed by the blocking layer (113) that extends inward from the side of the first bank (111-1) may be formed as the blocking structure (138-1, 138-2). The blocking layer (113) may include a silicon-based inorganic material, a metal, or the like. Aluminum (Al), molybdenum (Mo), a molybdenum alloy, or the like may be used as the metal, but is not limited thereto.

[0167] Although not shown in FIG. 6, the blocking structures (134-1, 134-2) may be arranged in an edge region of the second bank (111-2). The blocking structures (134-1, 134-2) may be arranged in an edge region of the plurality of second banks (111-2) between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X) or in an edge region of the plurality of first banks (111-1) between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0168] According to an embodiment, since the hole injection layer, charge generation layer, etc. of each of the plurality of subpixels (SPr, SPg, SPb) are disconnected by the blocking structure (134-1, 134-2), leakage current flowing to the hole injection layer, charge generation layer, etc. is blocked, and image quality deterioration can be prevented.

[0169] 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 may be cross-sectional views taken along lines C-C' and D-D' of Fig. 2, respectively.

[0170] The fourth and fifth embodiments are similar to the first embodiment (Fig. 3), the second embodiment (Fig. 4), and the third embodiment (Fig. 5) except for the protrusion (127), the plurality of connecting structures (124-1, 124-2), and the plurality of waterproof structures (128-1, 128-2). In the fourth and fifth embodiments, components having the same shape, structure, and / or function as those in the first embodiment (Fig. 3), the second embodiment (Fig. 4), and / or the third embodiment (Fig. 5) are given the same drawing reference numerals, and a detailed description thereof is omitted.

[0171] Although not shown, the area between the plurality of red subpixels (SPr) in the second direction (Y) and the area between the plurality of green subpixels (SPg) in the second direction (Y) may also have the same structure as the area between the plurality of blue subpixels (SPb) in the second direction (Y) shown in FIGS. 6 and 7.

[0172] As shown in FIGS. 2, 6 and 7, the organic light emitting display device according to the embodiment may include a plurality of protrusions (127).

[0173] A plurality of protrusions (127) may be arranged on the upper side of a plurality of banks (111-1). The plurality of protrusions (127) may be arranged on the upper side of the first bank (111-1) between a plurality of blue subpixels (SPb) in the second direction (Y). Although not illustrated, the plurality of protrusions (127) may also be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X), but this is not limited thereto.

[0174] The left and right sides of the protrusion (127) may have shapes that are symmetrical with respect to the central normal line of the protrusion (127), but this is not limited thereto. For example, the left and right sides of the protrusion (127) may each have an undercut structure. In this case, the undercut structure on the left side and the undercut structure on the right side may have shapes that are symmetrical with respect to the central normal line of the protrusion (127).

[0175] The protrusion (127) may include a floor layer (161), a pillar layer (162) on the floor layer (161), and a roof layer (163) on the pillar layer (162).

[0176] The bottom layer (161) may include, for example, a metal or a conductive oxide material having excellent electrical conductivity. Accordingly, the bottom layer (161) may be an auxiliary electrode connected to the second power wire (PL2). The blue cathode electrode (123b) may be electrically connected to a portion of the bottom layer (161) and / or the pillar layer (162).

[0177] The bottom layer (161) may include a material having a low etching rate. For example, the etching rate of the bottom layer (161) may be lower than the etching rate of the pillar layer (162).

[0178] An undercut structure (127a, 127b) can be formed by the floor layer (161), the pillar layer (162), and the roof layer (163). That is, an undercut structure (127a, 127b) can be formed in which the side of the pillar layer (162) is recessed inwardly from the side of the floor layer (161) and / or the side of the roof layer (163) toward the protrusion (127).

[0179] The undercut structure (127a, 127b) may have a cave shape. For example, the undercut structure (127a, 127b) may have a U-shaped dongle shape. Therefore, the undercut structure (127a, 127b) may be called a cave, a U-shaped cave, a cave part, etc. In order to form the undercut structure (127a, 127b), the pillar layer (162) may have an etching selectivity that is different from that of the bottom layer (161) and / or the roof layer (163). For example, the pillar layer (162) may include a material having a high etching rate, and the bottom layer (161) and / or the roof layer (163) may include a material having a low etching rate. Accordingly, when the bottom layer (161), 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 bottom layer (161) and / or the roof layer (163), so that an undercut structure (127a, 127b) can be formed on the side of the protrusion (127).

[0180] The pillar layer (162) may be formed of a metal, a conductive oxide material, an 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 conductive oxide material, ITO, IZO, etc. may be used. As the insulating material, a silicon oxide series material or a silicon nitride series material may be used.

[0181] Meanwhile, by adjusting the distance between the target and source of the evaporation source (or evaporation source device), the deposition material can be deposited on the substrate (110) at different deposition angles. The target-source distance may be the distance between the evaporation source and the substrate (110). The deposition angle may be the angle of an imaginary line between the evaporation source and the lower edge of the roof layer (163) with respect to the normal direction. For example, the larger the target-source distance, the smaller the deposition angle can be. The smaller the deposition angle, the closer the layer formed by the deposition material can be deposited to an adjacent subpixel. The larger the deposition angle, the closer the layer can be deposited to the protrusion (127).

[0182] As illustrated in Fig. 6, by depositing deposition materials at different deposition angles, one end of the blue organic light-emitting layer (122b) and one end of the first conductive layer (123-1) of the blue cathode electrode (123b) can be positioned differently from each other.

[0183] The blue cathode electrode (123b) may include multiple conductive layers (123-1, 123-2). For example, the blue cathode electrode (123b) may include a first conductive layer (123-1) and a second conductive layer (123-2) on the first conductive layer (123-1), but may also include three or more conductive layers.

[0184] One end of the blue organic light-emitting layer (122b) and one end of the first conductive layer (123-1) may be positioned on the upper side of the bank (111-1). For example, one end of the blue organic light-emitting layer (122b) may be positioned closer to the pillar layer (162) than one end of the first conductive layer (123-1).

[0185] The second conductive layer (123-2) may be disposed on the entire area of ​​the substrate (110). The second conductive layer (123-2) may be deposited using a sputtering process. That is, the second conductive layer (123-2) may be disposed on the upper side of the first conductive layer (123-1) of each subpixel (SPr, SPg, SPb), the upper side of the bank (111-1), and the side and upper side of the protrusion (127). The second conductive layer (123-2) may be in contact with the side of the pillar layer (162) and / or the lower side of the roof layer (163).

[0186] For example, the first conductive layer (123-1) may include a metal having excellent electrical conductivity, and the second conductive layer (123-2) may include a conductive oxide material. For example, the first conductive layer (123-1) may include a Mg:Ag alloy, and the second conductive layer (123-2) may include ITO, IZO, and the like.

[0187] A first conductive layer (123-1) can be formed by deposition of a Mg:Ag alloy using an evaporation source. However, since the step coverage characteristics of Mg:Ag are poor, it is difficult for a deposition material including a Mg:Ag alloy to be deposited deep within the undercut structure of the connecting structure (124-1, 124-2). In addition, if the film thickness uniformity of the first conductive layer (123-1) including a Mg:Ag alloy is insufficient or the process margin is insufficient, the first conductive layer (123-1) may not be electrically connected to the auxiliary electrode included in the connecting structure (124-1, 124-2), resulting in poor electrical connection.

[0188] To solve this problem, a conductive oxide material such as ITO having excellent step coverage characteristics can be deposited on the substrate (110) using a sputtering process, thereby being deposited deep within the undercut structure of the connection structure (124-1, 124-2). Accordingly, the second conductive layer (123-2) can be stably deposited on the side of the pillar layer (162), which is an auxiliary electrode, so that poor electrical connection between the blue cathode electrode (123b) including the first conductive layer (123-1) and the second conductive layer (123-2) and the auxiliary electrode can be prevented. In addition, the uniformity of the film thickness of the conductive layer can be secured, so that the stability of production quality can be improved.

[0189] When the second conductive layer (123-2) is formed on the first conductive layer (123-1), there is no need to adjust or manage the deposition angle to deposit the first conductive layer (123-1) using an evaporation source. In addition, even if the first conductive layer (123-1) as well as the blue organic light-emitting layer (122b) using an evaporation source are freely deposited without being restricted by the deposition angle, the blue organic light-emitting layer (122b) can be deposited in the corresponding subpixels (SPr, SPg, SPb) and the blue cathode electrode (123b) can be stably connected to the auxiliary electrode of the protrusion (127) by the second conductive layer (123-2). Therefore, when configured with a combination of the above-described connection structures (124-1, 124-2) and the blocking structure (105B), productivity and material utilization efficiency can be improved through an even freer deposition process.

[0190] In addition, when the organic light-emitting display device is implemented in a top emission manner, the light-emitting efficiency can be improved by utilizing constructive interference between the anode electrode (121r, 121g, 121b) and the blue cathode electrode (123b) by using a blue cathode electrode (123b) including a first conductive layer (123-1) including an Ag:Mg alloy and an anode electrode (121r, 121g, 121b) including a semi-transparent material.

[0191] Meanwhile, a protrusion (127) may be locally formed in a dot shape only between a plurality of blue subpixels (SPb) in the second direction (Y). In this case, in an area where the protrusion (127) is not formed, as illustrated in FIG. 7, the blue light-emitting layer (122b) and the blue cathode electrode (123b) may be continuously connected to adjacent blue subpixels (SPb) on the first bank (111-1) without interruption.

[0192] Meanwhile, a plurality of waterproof structures (128-1, 128-2) may be disposed on the side of the protrusion (127). For example, a third inorganic insulating layer (135-3) may be formed on a plurality of undercut structures (127a, 127b) formed on the side of the protrusion (127). For example, the third inorganic insulating layer (135-3) may be formed in a curved shape in the plurality of undercut structures (127a, 127b). For example, a plurality of waterproof structures (128-1, 128-2) having a curved shape may be formed by disposing the third inorganic insulating layer (135-3) on the upper side of the bottom layer (161), the side of the pillar layer, and the lower side of the roof slab in the plurality of undercut structures (127a, 127b).

[0193] The plurality of waterproof structures (128-1, 128-2) may be formed by a first inorganic insulating layer arranged on a plurality of red subpixels (SPr) in the second direction (Y) or a second inorganic insulating layer arranged on a plurality of green subpixels (SPg) in the second direction (Y).

[0194] Meanwhile, the blocking structure (138-1, 138-2) can be formed by an undercut structure formed in the lower edge area of ​​the first bank (111-1).

[0195] The blocking structure (138-1, 138-2) may include at least one blocking layer (113) for forming an undercut structure extending inward from the side of the first bank (111-1). The undercut structure formed by the blocking layer (113) extending inward from the side of the first bank (111-1) may be formed as the blocking structure (138-1, 138-2).

[0196] Fig. 8 is a plan view schematically illustrating an organic light-emitting display device according to a third embodiment.

[0197] The third embodiment is identical to the second embodiment (Fig. 2) except for the connection structures (124-1, 124-2, 130). In the third embodiment, components having the same shape, structure, and / or function as those in the second embodiment (Fig. 2) are given the same drawing reference numerals, and detailed descriptions are omitted.

[0198] As illustrated in FIG. 8, a plurality of connection structures (124-1, 124-2, 130) may be arranged in a plurality of intersection areas where a plurality of first power wires (PL1) and a plurality of second power wires (PL2) intersect. The plurality of connection structures (124-1, 124-2, 130) may be the connection structures (124-1, 124-2, 130) illustrated in FIGS. 4 to 6. The connection structures (124-1, 124-2, 130) may electrically connect cathode electrodes of a plurality of subpixels (SPr, SPg, SPb) to the first power wire (PL1) and the second power wire (PL2).

[0199] A plurality of first power wires (PL1) and a plurality of second power wires (PL2) are arranged in a display area (AA), and a third power wire (PL3) can connect a plurality of second power wires (PL2) to a power terminal (101) in a non-display area (NAA).

[0200] At least three or more subpixels can share one connection structure (124-1, 124-2, 130). That is, at least three or more subpixels can be commonly connected to one connection structure (124-1, 124-2, 130). For example, cathode electrodes of two adjacent green subpixels (SPg) and two adjacent blue subpixels (SPb) can be commonly electrically connected to one connection structure (124-1, 124-2, 130).

[0201] In the second embodiment (Fig. 2), a plurality of connection structures (124-1, 124-2, 130) are arranged between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y), whereas in the third embodiment (Fig. 8), a plurality of connection structures (124-1, 124-2, 130) may be arranged in a plurality of intersection areas where a plurality of first power wires (PL1) and a plurality of second power wires (PL2) intersect.

[0202] According to an embodiment, since at least three or more subpixels share one connection structure (124-1, 124-2, 130), the number of connection structures (124-1, 124-2, 130) is reduced, thereby reducing the process time and minimizing the possibility of defects in the process.

[0203] In addition, although the connection structures (124-1, 124-2, 130) are shown as being shared with adjacent subpixels in the process of patterning by color pattern in FIG. 8, as shown in FIG. 2, they may be patterned so as to be connected only to subpixels of the corresponding color within a stripe pattern of the same color. Through this structure, the factor of reduced yield due to complexity resulting from sharing the connection structures (124-1, 124-2, 130) can be improved.

[0204] For example, as illustrated in FIG. 8, the shape of the pattern for patterning a plurality of green subpixels on the second column line can be patterned to include the right connection structure (124-1, 124-2, 130) between the first row and the second row. In addition, the pattern can be patterned so as not to include the right connection structure (124-1, 124-2, 130) between the second row and the third row.

[0205] In this way, by dividing adjacent subpixels by alternating the nth row and the n+1th row, and by arranging the connection structure (124-1, 124-2, 130) in an area where the four subpixels intersect and are easy to design, the EAR can be improved.

[0206] According to an embodiment, by not arranging a plurality of connection structures (124-1, 124-2, 130) between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y), the light-emitting area of ​​each subpixel can be enlarged, thereby improving the lifespan and brightness of the product.

[0207] Meanwhile, as illustrated in FIG. 8, the number of connection structures (124-1, 124-2, 130) can be reduced by arranging the connection structures (124-1, 124-2, 130) in multiple intersection areas where multiple first power wires (PL1) and multiple second power wires (PL2) intersect. In addition, the connection structures (124-1, 124-2, 130) can be electrically connected to at least two areas of each of multiple subpixels adjacent to the connection structures (124-1, 124-2, 130). The electrical connection method may include a laser ablation process, a laser welding process, a method using an undercut structure (138 in FIG. 5), etc.

[0208] In the stripe pixel arrangement structure illustrated in FIG. 2 or FIG. 8, the third power wire (PL3) can be electrically connected to the second power wire (PL2) in the non-display area (NAA).

[0209] In FIG. 2 or FIG. 8, all subpixels are arranged to be connected to the connection structures (124-1, 124-2, 130). However, in the display area (AA), even if the second power line (PL2) is electrically connected to one subpixel in units of 10 to 20 subpixels along the second direction (Y) through the connection structures (124-1, 124-2, 130), uniform power supply, for example, the first potential voltage, can be applied. Therefore, the number of connection structures (124-1, 124-2, 130) can be reduced to 1 / 8 of the number of connection structures (124-1, 124-2, 130) illustrated in FIG. 2 or FIG. 8. In addition, even if multiple connection structures (124-1, 124-2, 130) are randomly arranged, the radiating area ratio (EAR) can be dramatically improved. Reducing the number of connection structures (124-1, 124-2, 130) can also contribute to improved productivity, yield, and reliability.

[0210] Fig. 9 is a plan view schematically illustrating an organic light-emitting display device according to a fourth embodiment.

[0211] The fourth embodiment is identical to the first embodiment (Fig. 1) except for the arrangement structure of the plurality of subpixels (SPr, SPg, SPb). In the fourth embodiment, components having the same shape, structure, and / or function as those in the first embodiment (Fig. 1) are given the same drawing reference numerals, and detailed descriptions are omitted.

[0212] As illustrated in FIG. 9, the plurality of subpixels (SPr, SPg, SPb) may include a plurality of red subpixels (SPr), a plurality of green subpixels (SPg), a plurality of blue subpixels (SPb), etc. The plurality of red subpixels (SPr) may emit light of a first color, the plurality of green subpixels (SPg) may emit light of a second color, and the plurality of blue subpixels (SPb) may emit light of a third color.

[0213] A plurality of red subpixels (SPr) may be arranged along a second direction (Y). A plurality of green subpixels (SPg) may be arranged between a plurality of red subpixels (SPr) in the second direction (Y). A plurality of blue subpixels (SPb) may be arranged parallel to a plurality of red subpixels (SPr) and a plurality of green subpixels (SPg) in the second direction (Y). For example, an area of ​​a blue subpixel (SPb) may be equal to or similar to a sum of an area of ​​a red subpixel (SPr) and an area of ​​a green subpixel (SPg).

[0214] Meanwhile, a plurality of connection structures (124-1, 124-2, 130) may be arranged lengthwise along the second direction (Y). The plurality of connection structures (124-1, 124-2, 130) may be connection structures (124-1, 124-2, 130) illustrated in FIGS. 4 to 6. The connection structures (124-1, 124-2, 130) may electrically connect cathode electrodes of a plurality of subpixels (SPr, SPg, SPb) to a power wiring (PL) in a non-display area (NAA).

[0215] A plurality of connection structures (124-1, 124-2, 130) can be arranged in units of two subpixels or two column lines along the first direction (X). The connection structures (124-1, 124-2, 130) can be arranged between a red subpixel (SPr) and a blue subpixel (SPb) and between a green subpixel (SPg) and a blue subpixel (SPb). In this case, the red subpixel (SPr), the green subpixel (SPg), and the blue subpixel (SPb) can share one connection structure (124-1, 124-2, 130). That is, the red subpixel (SPr), the green subpixel (SPg), and the blue subpixel (SPb) can be commonly connected to one connection structure (124-1, 124-2, 130).

[0216] According to an embodiment, a plurality of connection structures (124-1, 124-2, 130) can be arranged lengthwise along a second direction (Y) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). Accordingly, the plurality of connection structures (124-1, 124-2, 130) can be arranged lengthwise in a stripe shape along the second direction (Y) and electrically connected to a power wiring (PL) on a non-display area (NAA), thereby reducing the complexity of the process.

[0217] According to an embodiment, a plurality of connection structures (124-1, 124-2, 130) may be connected in common to a single connection structure (124-1, 124-2, 130) along the second direction (Y), such that a red subpixel (SPr), a green subpixel (SPg), and a blue subpixel (SPb) are connected to the same connection structure (124-1, 124-2, 130). Accordingly, a cathode electrode having a wider area is electrically connected to the power wiring (PL), so that the same or similar voltage is strongly generated regardless of the position of the panel, thereby improving the picture quality.

[0218] Fig. 10 is a plan view schematically illustrating an organic light-emitting display device according to the fifth embodiment.

[0219] The fifth embodiment is identical to the first embodiment (Fig. 1) except for the multiple connection structures (153, 154). In the fifth embodiment, components having the same shape, structure, and / or function as those in the first embodiment (Fig. 1) are given the same drawing reference numerals, and detailed descriptions are omitted.

[0220] As illustrated in FIG. 10, a plurality of red subpixels (SPr) may be arranged along the second direction (Y). A plurality of green subpixels (SPg) may be arranged between the plurality of red subpixels (SPr) in the second direction (Y). A plurality of blue subpixels (SPb) may be arranged parallel to the plurality of red subpixels (SPr) and the plurality of green subpixels (SPg) in the second direction (Y).

[0221] The plurality of connection structures may include a plurality of first connection structures (153) and a plurality of second connection structures (154).

[0222] A plurality of first connection structures (153) may be arranged lengthwise along the second direction (Y). The plurality of first connection structures (153) may be arranged in units of two subpixels or two column lines along the first direction (X). The first connection structures (153) may be arranged between a red subpixel (SPr) and a blue subpixel (SPb) and between a green subpixel (SPg) and a blue subpixel (SPb). In this case, the red subpixel (SPr), the green subpixel (SPg), and the blue subpixel (SPb) may share one first connection structure (153). That is, the red subpixel (SPr), the green subpixel (SPg), and the blue subpixel (SPb) may be commonly connected to one first connection structure (153).

[0223] A plurality of second connection structures (154) can branch in the first direction (X) from a plurality of second connection structures (124-1, 124-2, 130).

[0224] For example, a plurality of second connection structures (154) may extend between a red subpixel (SPr) and a green subpixel (SPg) in a plurality of first connection structures (124-1, 124-2, 130).

[0225] For example, the plurality of second connection structures (154) may be arranged in units of two subpixels or units of two column lines along the second direction (Y). For example, the plurality of second connection structures (154) may be arranged between a green subpixel (SPg) and a red subpixel (SPr) along the second direction (Y), and may not be arranged between a red subpixel (SPr) and a green subpixel (SPg), but this is not limited thereto.

[0226] For example, a plurality of second connection structures (154) may extend between a plurality of blue subpixels (SPb) in the second direction (Y) from a plurality of first connection structures (153).

[0227] Although not shown, both sides of the second connecting structure (154) may be electrically connected to adjacent first connecting structures (153).

[0228] Unlike the fourth embodiment (Fig. 9), in the fifth embodiment (Fig. 10), a plurality of second connection structures (154) extending between the red subpixel (SPr) and the green subpixel (SPg) are added, thereby increasing the electrical contact area for the cathode electrodes of each of the red subpixel (SPr) and the green subpixel (SPg), thereby enabling smooth current supply and improving the lifespan and brightness of the product.

[0229] Fig. 11 is a plan view schematically illustrating an organic light-emitting display device according to the sixth embodiment.

[0230] As illustrated in FIG. 11, the plurality of connection structures (153 to 156) may include two or more connection structures branching at a plurality of intersections (CP) between a plurality of red subpixels (SPr), a plurality of green subpixels (SPg), and a plurality of blue subpixels (SPb).

[0231] For example, the plurality of connection structures may include a plurality of first connection structures (153), a plurality of second connection structures (154), a plurality of third connection structures (155), a plurality of fourth connection structures (156), etc.

[0232] The first connection structure (153) may be branched between the red subpixel (SPr) and the blue subpixel (SPb) at the intersection (CP), and may be shared by the red subpixel (SPr) and the blue subpixel (SPb). That is, the red subpixel (SPr) and the blue subpixel (SPb) may be electrically connected in common to the first connection structure (153). For example, the cathode electrodes of the red subpixel (SPr) and the blue subpixel (SPb) may be commonly connected to the first connection structure (153).

[0233] The second connection structure (154) may be branched between the green subpixel (SPg) and the blue subpixel (SPb) at the intersection (CP), and may be shared by the green subpixel (SPg) and the blue subpixel (SPb). That is, the green subpixel (SPg) and the blue subpixel (SPb) may be commonly electrically connected to the second connection structure (154). For example, the cathode electrodes of the green subpixel (SPg) and the blue subpixel (SPb) may be commonly connected to the second connection structure (154).

[0234] The plurality of power wires may include a plurality of first power wires (PL1) and a plurality of second power wires (PL2). The plurality of first power wires (PL1) may be arranged between a plurality of red subpixels (SPr) and a plurality of blue subpixels (SPb) and between a plurality of green subpixels (SPg) and a plurality of blue subpixels (SPb) in the display area (AA). The plurality of first power wires (PL1) may be arranged in units of two column lines or two subpixels along the first direction (X). The plurality of first power wires (PL1) may be arranged to be connected to each other in the first direction (X) and the second direction (Y) in a matrix form. The second power wire (PL2) may connect the power terminal (101) to the plurality of first power wires (PL1) in the non-display area (NAA). In this case, a plurality of first connection structures (153) and a plurality of second connection structures (154) can be arranged corresponding to a plurality of first power wires (PL1).

[0235] The third connection structure (155) may be branched between the red subpixel (SPr) and the green subpixel (SPg) at the intersection (CP), and may be shared by the red subpixel (SPr) and the green subpixel (SPg). That is, the red subpixel (SPr) and the green subpixel (SPg) may be commonly electrically connected to the third connection structure (155). For example, the cathode electrodes of the red subpixel (SPr) and the green subpixel (SPg) may be commonly connected to the third connection structure (155).

[0236] The fourth connection structure (156) may be branched between adjacent blue subpixels (SPb) at the intersection point (CP) and may be shared by the adjacent blue subpixels (SPb). That is, the adjacent blue subpixels (SPb) may be electrically connected in common to the fourth connection structure (156). For example, the cathode electrodes of the adjacent blue subpixels (SPb) may be commonly connected to the fourth connection structure (156).

[0237] According to an embodiment, two or more connection structures branching from a plurality of intersections (CP) between a plurality of red subpixels (SPr), a plurality of green subpixels (SPg), and a plurality of blue subpixels (SPb) may be arranged. Accordingly, two side portions contacting at least two corners of the cathode electrodes of each of the plurality of subpixels (SPr, SPg, SPb) may be electrically connected to the first power wire (PL1). Accordingly, the light-emitting area of ​​each of the plurality of subpixels (SPr, SPg, SPb) may be increased, and the electrical contact area with respect to the cathode electrode may be increased, thereby improving the lifespan and brightness of the product.

[0238] Fig. 12 is a plan view schematically illustrating an organic light-emitting display device according to the seventh embodiment.

[0239] The seventh embodiment is identical to the fourth embodiment (Fig. 9) except for the arrangement structure of the multiple subpixels (SPr, SPg, SPb). In the seventh embodiment, components having the same shape, structure, and / or function as those in the fourth embodiment (Fig. 9) are given the same drawing reference numerals, and detailed descriptions are omitted.

[0240] In the seventh embodiment (Fig. 12), the arrangement structure of the plurality of red subpixels (SPr) and the plurality of green subpixels (SPg) may be the same as in the fourth embodiment (Fig. 9).

[0241] In the fourth embodiment (Fig. 9), the blue subpixels (SPb) are separated along the second direction (Y), whereas in the seventh embodiment (Fig. 12), the blue subpixels (SPb) can be arranged in a stripe shape along the second direction (Y). That is, in the fourth embodiment (Fig. 9), the blue organic light-emitting layer and the blue cathode electrode of the blue organic light-emitting element (120b) can be separated in units of one subpixel or one row line. In contrast, in the seventh embodiment (Fig. 12), the blue organic light-emitting layer and the blue cathode electrode of the blue organic light-emitting element (120b) can be continuously connected without interruption in a stripe shape along the second direction (Y).

[0242] As in the fourth embodiment (Fig. 9), in the seventh embodiment (Fig. 12), a plurality of connection structures (124-1, 124-2, 130) can be arranged lengthwise along the second direction (Y) between a plurality of red subpixels (SPr) and a plurality of blue subpixels (SPb) and between a plurality of green subpixels (SPg) and a plurality of blue subpixels (SPb).

[0243] The pixel arrangement of FIGS. 9 to 12 may be a structure in which the red subpixels (SPb) are arranged in a long stripe pattern in the second direction (Y), and the red subpixels (SPr) and green subpixels (SPg) are arranged in a dot shape, so that it is easy to make up the area of ​​the blue subpixels (SPb) with a short lifespan.

[0244] To maximize product lifespan, the area of ​​the blue subpixel (SPb), which has the shortest lifespan, can occupy approximately 55-70% of the area of ​​a single pixel. This allows for easy design optimization of the pixel area ratio, resulting in superior image quality for displaying characters and other visuals.

[0245] FIGS. 9 to 12 may be examples of optimized arrangements of connection structures (124-1, 124-2, 130) in a pixel arrangement structure in which the dot shape and stripe pattern described above are mixed.

[0246] As shown in FIGS. 9, 10 and 12, a line or bar-shaped connection structure (124-1, 124-2, 130) may be placed on another power wire connected to a power wire (PL) of a non-display area (NAA) below, and a connection structure (124-1, 124-2, 130) of an undercut structure (127a, 127b) provided on a first protrusion (127) connected to another power wire may be placed on another power wire.

[0247] For example, as illustrated in FIG. 9, the deposition angle of the cathode electrode material of the blue subpixel (SPb) and the deposition angle of the cathode electrode material of each of the red subpixel (SPr) and green subpixel (SPg) may be arranged to face in opposite directions.

[0248] Although not shown, in order to improve the degree of freedom of operation of the deposition equipment according to these deposition angles, a plurality of protruding undercut connection structures (124-1, 124-2, 130) may be arranged in the form of dots or points rather than lines along the second direction (Y) in the blue subpixel (SPb), as shown in FIG. 2.

[0249] 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. Power wiring; Multiple subpixels; a plurality of organic light-emitting elements in the plurality of subpixels; and A plurality of connection structures for connecting a plurality of cathode electrodes of the plurality of organic light-emitting elements to the power wiring around the plurality of subpixels; The plurality of subpixels have different colors along a first direction and have the same color along a second direction intersecting the first direction, Organic light emitting display device.

2. In paragraph 1, The above plurality of connection structures are arranged lengthwise along the second direction between the plurality of subpixels, Organic light emitting display device.

3. In paragraph 1, The above plurality of connection structures are arranged between the plurality of subpixels in the second direction. Organic light emitting display device.

4. In paragraph 1, The above power wiring is, a plurality of first power wires along the first direction; and a plurality of second power wires intersecting the plurality of first power wires along the second direction; The above plurality of connection structures are arranged in the intersection area of ​​the plurality of first power wires and the plurality of second power wires. Organic light emitting display device.

5. In paragraph 1, A plurality of banks between the plurality of subpixels; A plurality of protrusions each including a floor layer on the plurality of banks, a pillar layer on the floor layer, and a roof layer on the pillar layer, wherein the protrusions have an undercut structure formed by the floor layer, the pillar layer, and the roof layer; Organic light emitting display device.

6. In paragraph 5, At least one layer of the bottom layer and the pillar layer is an auxiliary electrode connected to the power wiring, The above connection structure is such that the cathode electrode contacts the upper surface of the auxiliary electrode in the above undercut structure. Organic light emitting display device.

7. In paragraph 5, an inorganic insulating layer on the plurality of organic light-emitting elements; and Further comprising a waterproof structure in the above undercut structure; Organic light emitting display device.

8. In paragraph 7, The above waterproof structure is configured such that the inorganic insulating layer is formed in a curved shape by an undercut structure. Organic light emitting display device.

9. In paragraph 1, further comprising a blocking structure between the plurality of subpixels; The hole injection layer or charge generation layer of the organic light-emitting layer is separated by the blocking structure. Organic light emitting display device.

10. Power wiring; Multiple subpixels; a plurality of organic light-emitting elements in the plurality of subpixels; and A plurality of connection structures for connecting a plurality of cathode electrodes of the plurality of organic light-emitting elements to the power wiring around the plurality of subpixels; The above plurality of subpixels are, A plurality of first subpixels along the second direction; a plurality of second subpixels between the plurality of first subpixels in the second direction; and A plurality of third subpixels arranged in parallel with the plurality of first subpixels and the plurality of second subpixels in the second direction; Organic light emitting display device.

11. In paragraph 10, The plurality of connection structures are arranged lengthwise along the second direction between the plurality of first subpixels and the plurality of third subpixels and between the plurality of second subpixels and the plurality of third subpixels. Organic light emitting display device.

12. In paragraph 10, The above multiple connection structures are, A plurality of first connection structures arranged lengthwise along the second direction between the plurality of first subpixels and the plurality of third subpixels and between the plurality of second subpixels and the plurality of third subpixels; and A plurality of second connection structures branching in the first direction from the plurality of first connection structures; Organic light emitting display device.

13. In paragraph 10, The above multiple connection structures are, comprising two or more connection structures branching from a plurality of intersections between the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels; Organic light emitting display device.

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