An organic light-emitting display device

Abstract

An organic light-emitting display device may include a plurality of anode electrodes on a plurality of subpixels, a plurality of organic light-emitting layers on a plurality of anode electrodes, a plurality of cathode electrodes on a plurality of organic light-emitting layers, a plurality of inorganic insulating layers on a plurality of cathode electrodes, a plurality of first protrusions disposed between a plurality of subpixels in a first direction and having a plurality of first undercut structures on a side, a plurality of first waterproof structures on a plurality of first protrusions, and a plurality of second waterproof structures on a plurality of first undercut structures of a plurality of first protrusions. The first waterproof structure may be configured such that at least two or more inorganic insulating layers among a plurality of inorganic insulating layers overlap on a first protrusion.

Description

Technology Field

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

[0002] With the increasing demand for portable information media, attempts to apply organic light-emitting diodes (OLEDs) to various lightweight and thin information electronic devices are expanding. Recently, there has been a trend toward applying OLEDs to product categories such as mobile PCs and automobiles rather than TVs or mobile phones. Since OLEDs applied to mobile PCs and automobiles operate with still images for extended periods, a long lifespan is required. To ensure a long lifespan, the extraction of light from the organic light-emitting diodes equipped in the OLED must be maximized. Furthermore, to achieve low costs, it is necessary to expand technology to enable the production of OLEDs on 10.5th generation (3370x2940mm) substrates as well as 8.5th generation (2200x2500mm) substrates. To produce long-life OLEDs, subpixels with a top-emission structure and a side-by-side structure must be implemented in a structure of at least two stacks of OLEDs.

[0003] The structure of such organic light-emitting diodes 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 production logistics must be carried out in a cluster manner rather than an inline manner. In addition, there is a problem of low pixel position accuracy (PPA) at the subpixel level between the FMM and the substrate. Consequently, the emission area ratio (EAR) is small, which limits the product lifespan. Here, EAR is the value obtained by dividing the light-emitting area of ​​a subpixel by the total area of ​​the subpixel.

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

[0005] The embodiments aim to solve the aforementioned problems and other problems.

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

[0007] In addition, another objective of the embodiment is to provide an organic light-emitting display device capable of improving lifespan.

[0008] In addition, another objective of the embodiment is to provide an organic light-emitting display device capable of improving productivity and yield.

[0009] In addition, another objective of the embodiment is to provide an organic light-emitting display device capable of improving image quality.

[0010] The technical problems of the embodiments are not limited to those described in this section and include those that can be identified through the description of the invention. means of solving the problem

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

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

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

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

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

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

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

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

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

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

[0021] The organic light-emitting display device further includes a plurality of second banks between the plurality of subpixels on the second direction; and the cathode electrodes may be continuously arranged on the second banks onto subpixels adjacent to the second banks. Effects of the invention

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

[0023] According to at least one of the embodiments, there is no need to use FMM, so the process can be simplified and process costs can be reduced.

[0024] According to at least one of the embodiments, there is no need to use FMM, so the EAR within the subpixel is increased, and the lifespan can be improved.

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

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

[0027] According to at least one of the embodiments, a plurality of connection structures may be disposed in a first groove of a plurality of first banks between a plurality of subpixels in a second direction. Accordingly, the cathode electrode of each subpixel is electrically connected to a first power wire through the plurality of connection structures, thereby facilitating the electrical connection between the cathode electrode and the first power wire and preventing a short circuit, so that operational failure or light emission failure of the subpixel is prevented and reliability can be improved.

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

[0029] According to at least one of the embodiments, a plurality of blocking structures may be disposed at the edges of the pillar layers of the bank and / or protrusion. Accordingly, lateral leakage current or longitudinal leakage current is prevented, thereby preventing image quality defects such as color stains and significantly improving luminous efficiency and brightness. In addition, electrical short circuits between the anode electrode and the cathode electrode within the corresponding subpixel are prevented, thereby preventing operational failures or luminous failures and increasing product reliability.

[0030] Further scopes of the applicability of the embodiments will become apparent from the following detailed description. However, since various changes and modifications within the spirit and scope of the embodiments are clearly understood by those skilled in the art, specific embodiments, such as the detailed description and preferred embodiments, should be understood as being given merely as examples. Brief explanation of the drawing

[0031] FIG. 1 is a schematic plan view illustrating an organic light-emitting display device according to a first embodiment. FIG. 2 is a cross-sectional view illustrating an organic light-emitting display device according to a first embodiment. FIG. 3 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment. FIG. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment. FIG. 5 is a schematic plan view illustrating an organic light-emitting display device according to a second embodiment. 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. The size, shape, numerical value, etc., of the components depicted in the drawings may differ from the actual product. Furthermore, even if the same components are depicted with different sizes, shapes, numerical values, etc., across different drawings, this is merely an example, and the same components may have the same size, shape, numerical value, etc., across different drawings. Specific details for implementing the invention

[0032] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components are assigned the same reference number regardless of drawing symbols, and redundant descriptions thereof will be omitted. The suffixes 'module' and 'part' for components used in the following description are assigned or used interchangeably for the sake of ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, the attached drawings are intended to facilitate an easy understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings. Additionally, when an element such as a layer, region, or substrate is referred to as existing 'on' another component, this includes existing directly on the other element or having other intermediate elements existing between them.

[0033] In the following, 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 Ph-SbS (side-by-side structure by photolithography). By using a photolithography process, there is no need to use an FMM, which simplifies the process and reduces process costs. Additionally, the lifespan can be improved by increasing the EAR within the subpixel. Furthermore, by depositing an organic light-emitting device on a large-area substrate using an inline deposition system, productivity, yield, and material utilization efficiency can be improved.

[0034] In the following, the red subpixel may be named the first subpixel, the green subpixel may be named the second subpixel, and the blue subpixel may be named the third subpixel. Additionally, the red organic light-emitting element may be named the first organic light-emitting element, the green organic light-emitting element may be named the second organic light-emitting element, and the blue organic light-emitting element may be named the third organic light-emitting element.

[0035] In the following description, the organic light-emitting display device is an upper light-emitting method in which light is emitted in the upper direction of the substrate to display an image, but a lower light-emitting method in which light is emitted in the lower direction of the substrate to display an image may also be included in the technical concept of the present invention.

[0036] FIG. 1 is a schematic plan view illustrating an organic light-emitting display device according to a first embodiment.

[0037] As illustrated in FIG. 1, an 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). The remaining area excluding the display area (AA) may be defined as a non-display area (NAA).

[0038] A plurality of pixels (P) may include, for example, a plurality of red subpixels (SPr), a plurality of green subpixels (SPg), a plurality of blue subpixels (SPb), etc. The plurality of subpixels (SPr, SPg, SPb) may have different colors along the first direction (X) and the same color along the second direction (Y), but are not limited thereto. That is, the plurality of subpixels (SPr, SPg, SPb) may have the same color along the second direction (Y) and have a long stripe pattern.

[0039] Each of the organic light-emitting layers and cathode electrodes of the plurality of organic light-emitting elements (120r, 120g, 120b) may have a stripe pattern arranged in a long shape along the second direction (Y) having the same color. For example, a plurality of red subpixels (SPr) emitting red light may be arranged in a stripe shape along the second direction (Y). For example, a plurality of green subpixels (SPg) emitting green light may be arranged in a stripe shape along the second direction (Y). For example, a plurality of green subpixels (SPg) emitting blue light may be arranged in a stripe shape along the second direction (Y).

[0040] A side-by-side organic light-emitting display device can be realized by arranging the red subpixel (SPr), green subpixel (SPg), and blue subpixel (SPb) alternately in column-line units along the first direction (X). For example, they may be arranged alternately in the order of the red subpixel (SPr), green subpixel (SPg), and blue subpixel (SPb) along the first direction (X), but are not limited thereto.

[0041] For example, a red organic light-emitting element (120r) may be placed in a red subpixel (SPr), a green organic light-emitting element (120g) may be placed in a green subpixel (SPg), and a blue organic light-emitting element (120b) may be placed in a green subpixel (SPg).

[0042] A plurality of subpixels (SPr, SPg, SPb) may each include a light-emitting region (EA) and a non-light-emitting region (NEA). The light-emitting region (EA) is an area where an organic light-emitting element (120r, 120g, 120b) is placed, and the non-light-emitting region (NEA) may be defined as the remaining area excluding the light-emitting region (EA).

[0043] The red organic light-emitting diode (120r), the green organic light-emitting diode (120g), and the blue organic light-emitting diode (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 diode (120r), the green organic light-emitting diode (120g), and the blue organic light-emitting diode (120b) may each include at least two stack structures. Each stack structure may include an organic light-emitting layer that emits light.

[0044] The organic light-emitting layer and 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 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 cathode electrode of each of the plurality of organic light-emitting elements (120r, 120g, 120b) may have a long stripe pattern with the same color along the second direction (Y). That is, the organic light-emitting layer and cathode electrode may each be disposed across the plurality of subpixels (SPr, SPg, SPb) along the second direction (Y). That is, the organic light-emitting layer and cathode electrode may each be disposed along the second direction (Y) to extend not only the plurality of subpixels (SPr, SPg, SPb) but also the regions between the plurality of subpixels (SPr, SPg, SPb).

[0045] Meanwhile, although not shown, multiple power lines may be provided to supply power to multiple subpixels (SPr, SPg, SPb) to supply a first potential voltage.

[0046] A plurality of power wirings may include a plurality of first power wirings and a plurality of second power wirings placed in a display area (AA) and a third power wiring placed in a non-display area (NAA).

[0047] A plurality of first power lines and a plurality of second power lines may be arranged in a matrix structure relative to each other in a display area (AA). A plurality of first power lines may be arranged in areas between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y), and a plurality of second power lines may be arranged in areas between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). A third power line may electrically connect a power terminal and a second power line in a non-display area (NAA).

[0048] A plurality of subpixels (SPr, SPg, SPb) may each include a driving circuit including a driving transistor, etc.

[0049] Although not shown, another power wiring may be provided to supply a second potential voltage greater than the first potential voltage. The other power wiring may be electrically connected to the driving transistors of each subpixel (SPr, SPg, SPb), but is not limited thereto.

[0050] When a specific subpixel (SPr, SPg, SPb) is selected by a scan transistor responding to a scan signal, light having a brightness corresponding to the current flowing through the driving transistor can be emitted from the specific subpixel (SPr, SPg, SPb) by using a first potential voltage of a plurality of power lines and a second potential voltage of another power line.

[0051] Meanwhile, a plurality of protrusions (124, 127) may be disposed between a plurality of subpixels (SPr, SPg, SPb). As will be explained later, the protrusions may be members protruding upward from the upper surface of each organic light-emitting element (120r, 120g, 120b) of the plurality of subpixels (SPr, SPg, SPb).

[0052] A plurality of protrusions may include a plurality of first protrusions (124) and a plurality of second protrusions (127). A plurality of first protrusions (124) may be positioned between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and a plurality of second protrusions (127) may be positioned between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0053] A plurality of first protrusions (124) may be extended between a plurality of dummy subpixels (SPrd, SPgd, SPbd) on a non-display area (NAA) to form a third protrusion. The non-display area (NAA) is an area vulnerable to the penetration of moisture, oxygen, etc. In an embodiment, the penetration of moisture, oxygen, etc. may be prevented by providing a plurality of fourth waterproof structures on the third protrusion. A plurality of fourth waterproof structures may be provided between a plurality of dummy subpixels (SPrd, SPgd, SPbd) on a first direction (X) or between a plurality of dummy subpixels (SPrd, SPgd, SPbd) on a first direction (X) and a plurality of dummy subpixels (SPrd, SPgd, SPbd) on a second direction (Y). The fourth waterproof structure may be identical to the structure of the third waterproof structure (128-1, 128-2) shown in FIG. 3.

[0054] A plurality of waterproof structures (125, 126-1, 26-2), a plurality of blocking structures, etc. may be disposed on a first protrusion (124) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X). A plurality of connecting structures (130-1, 130-2) may be disposed on a second protrusion (127) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0055] Since the first protrusion (124) is formed in a structure capable of blocking not only water but also electrically, multiple blocking structures may be omitted. For example, if the effect on image quality caused by leakage current between multiple subpixels (SPr, SPg, SPb) in the first direction (X), i.e., lateral leakage current, is minimal, multiple blocking structures may not be placed between multiple subpixels (SPr, SPg, SPb) in the first direction (X). The connection structure (130-1, 130-2) can electrically connect the second power wiring placed between multiple subpixels (SPr, SPg, SPb) in the second direction (Y) to multiple cathode electrodes of multiple organic light-emitting elements (120r, 120g, 120b) of the multiple subpixels (SPr, SPg, SPb).

[0056] The blocking structure may be a structure that separates layers containing 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 an electrical short circuit between the anode electrode and the cathode electrode and reduce leakage current between subpixels.

[0057] As will be explained later, lateral leakage current or longitudinal leakage current between multiple subpixels (SPr, SPg, SPb) can be prevented by a blocking structure. Lateral leakage current is leakage current flowing between adjacent subpixels (SPr, SPg, SPb) along a first direction (X), and longitudinal leakage current may be leakage current flowing between adjacent subpixels (SPr, SPg, SPb) along a second direction (Y). Additionally, electrical short circuits between the anode electrode and the cathode electrode in the corresponding subpixels (SPr, SPg, SPb) can be prevented by the blocking structure. Therefore, by using a blocking structure, color stains caused by leakage current can be improved, and luminous efficiency and brightness can be significantly enhanced. Furthermore, since electrical short circuits between the anode electrode and the cathode electrode are prevented, operational failures or luminous failures are prevented, thereby increasing product reliability.

[0058] A plurality of waterproof structures (125, 126-1, 26-2) may be placed in a display area (AA) and / or a non-display area (NAA). For example, a plurality of waterproof structures (125, 126-1, 26-2) may be placed between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X) and / or a second direction (Y) in the display area (AA) and / or a non-display area (NAA). A plurality of waterproof structures (125, 126-1, 26-2) may be placed in the non-emissive area (NEA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) and / or a second direction (Y).

[0059] A plurality of waterproof structures may include a plurality of first waterproof structures (125), a plurality of second waterproof structures (126-1, 126-2), a plurality of third waterproof structures, etc. As will be explained later, a plurality of first waterproof structures (125) and a plurality of second waterproof structures (126-1, 126-2) may be provided on a plurality of first protrusions (124), and a plurality of third waterproof structures may be provided on a plurality of second protrusions (127). The third waterproof structure can ensure reliability for products in high-humidity environments by blocking the passage through which moisture, oxygen, etc. penetrate into the connection structure (130-1, 130-2) and degrade connection characteristics, or by blocking the passage through which moisture, oxygen, etc. penetrate into adjacent subpixels.

[0060] Meanwhile, organic light-emitting layers are vulnerable to moisture and oxygen; if these layers are damaged by such substances, the corresponding subpixels (SPr, SPg, SPb) may not function, resulting in light emission failures. If many subpixels (SPr, SPg, SPb) fail to function due to moisture or oxygen, display defects such as point light emission failures or area light emission failures may occur, potentially reducing product reliability.

[0061] However, multiple waterproof structures (125, 126-1, 26-2) such as those in the examples prevent moisture, oxygen, etc. from penetrating into the non-display area (NAA) or display area (AA), thereby preventing operational failures or light emission failures of the subpixels (SPr, SPg, SPb). Accordingly, the organic light-emitting layer of the subpixels (SPr, SPg, SPb) is not affected by moisture, oxygen, etc., and reliability can be dramatically improved.

[0062] Meanwhile, a pillar layer (162 in FIG. 2) may be disposed on a substrate between multiple subpixels (SPr, SPg, SPb) in the first direction (X) instead of a bank, and a bank may be disposed on a substrate between multiple subpixels (SPr, SPg, SPb) in the second direction (Y). Alternatively, a pillar layer (162 in FIG. 2) may be disposed on a substrate between multiple subpixels (SPr, SPg, SPb) in the second direction (Y) without a bank being disposed.

[0063] In this case, the width (W1) between the light-emitting regions (EA) between the multiple subpixels (SPr, SPg, SPb) in the first direction (X) is reduced to the width of the pillar layer of the first protrusion (124), which is smaller than the width of the roof layer (163 in FIG. 2), so that the area of ​​the light-emitting regions (EA) of each subpixel (SPr, SPg, SPb) can be increased.

[0064] In the drawing, the box indicated by the dotted line illustrates the light-emitting region (EA) (or area) of each subpixel (SPr, SPg, SPb), and the solid line may illustrate a plurality of subpixels (SPr, SPg, SPb) having a plurality of waterproof structures (125, 126-1, 26-2) in a stripe form.

[0065] The width (W1) between the light-emitting regions (EA) can be determined by a portion of the area of ​​the plurality of first protrusions (124) arranged between the plurality of subpixels (SPr, SPg, SPb) in the first direction (X), such as the width of the pillar layer. That is, by reducing the width (W1) between the light-emitting regions (EA) by the width of the pillar layer, the area of ​​the light-emitting region (EA) of each subpixel (SPr, SPg, SPb) increases, thereby increasing the lifespan at high brightness and enabling the realization of a high-brightness display.

[0066] FIG. 2 is a cross-sectional view illustrating an organic light-emitting display device according to a first embodiment. FIG. 2 may be a cross-sectional view taken along the line A-A' in FIG. 1.

[0067] Although not shown, the area between the plurality of green subpixels (SPg) and the plurality of red subpixels (SPr) in the first direction (X), or the area between the plurality of green subpixels (SPg) and the plurality of green subpixels (SPg) in the first direction (X), may also have the same or similar structure as the area between the plurality of red subpixels (SPr) and the plurality of green subpixels (SPg) in the first direction (X) shown in FIG. 2.

[0068] As illustrated in FIGS. 1 and 2, a first protrusion (124) may be disposed on a substrate (110) between a red subpixel (SPr) and a green subpixel (SPg) in a first direction (X). The first protrusion (124) may be disposed along a second direction (Y) between the red subpixel (SPr) and the green subpixel (SPg) in the first direction (X), but is not limited thereto.

[0069] The left and right sides of the first protrusion (124) may have shapes that are symmetric to each other with respect to the center normal of the first protrusion (124). As will be explained later, this may be because the roof layer (163) and the column layer (162) are formed in a single photolithography process.

[0070] The first protrusion (124) may have a plurality of first undercut structures (124a, 124b). For example, the plurality of first undercut structures (124a, 124b) may be formed on the side of the first protrusion (124).

[0071] The first protrusion (124) may include a column layer (162) and a roof layer (163) on the column layer (162).

[0072] A plurality of first undercut structures (124a, 124b) can be formed by the column layer (162) and the roof layer (163).

[0073] In order to form a plurality of first undercut structures (124a, 124b), the pillar layer (162) and the roof layer (163) may be formed of materials having different etching selectivity ratios or etching rates. For example, the pillar layer (162) may include a material with a fast etching rate, and the roof layer (163) may include a material with a slow etching rate. Accordingly, when the pillar layer (162) and the roof layer (163) are etched after a photosensitive pattern is formed on the roof layer (163), the side of the pillar layer (162) is etched faster than the side of the roof layer (163), thereby forming a plurality of first undercut structures (124a, 124b) on the side of the first protrusion (124). That is, by the side of the column layer (162) moving inward from the side of the roof layer (163) toward the inner direction of the first protrusion (124), a plurality of first undercut structures (124a, 124b) can be formed.

[0074] A plurality of first undercut structures (124a, 124b) may have a cave shape. For example, a plurality of first undercut structures (124a, 124b) may have a U-shaped curve. Accordingly, the first undercut structures (124a, 124b) may be referred to as caves, U caves, cave sections, etc.

[0075] The pillar layer (162) may be made of an inorganic insulating material. Silicon oxide-based materials or silicon nitride-based materials may be used as the inorganic insulating material.

[0076] The roof layer (162) may be made of metal, inorganic insulating material, etc. As metals, titanium (Ti), molybdenum (Mo), molybdenum-titanium (MoTi), aluminum (Al), copper (Cu), and alloys thereof may be used. As inorganic insulating materials, silicon oxide-based materials or silicon nitride-based materials may be used.

[0077] Meanwhile, a red organic light-emitting element (120r) may be placed on the substrate (110) at a red subpixel (SPr), and a green organic light-emitting element (120g) may be placed on the substrate (110) at a green subpixel (SPg).

[0078] The red organic light-emitting element (120r) may include a red anode electrode (121r), a red organic light-emitting layer (122r), a red cathode electrode (123r), etc. The green organic light-emitting element (120g) may include a green anode electrode (121g), a green organic light-emitting layer (122g), a green cathode electrode (123g), etc.

[0079] The red anode electrode (121r) and the green anode electrode (121g) can be formed first before the first protrusion (124) is formed. That is, the red anode electrode (121r) and the green anode electrode (121g) can be formed by forming and patterning a conductive film on the substrate (110). The red anode electrode (121r) and the green anode electrode (121g) can be spaced apart from each other by a minimum distance (D1) so that an electrical short circuit does not occur. Subsequently, the first protrusion (124) can be formed on the substrate (110) between the red subpixel (SPr) and the green subpixel (SPg).

[0080] As described above, the first protrusion (124) may include a column layer (162) and a roof layer (163). To form a plurality of first undercut structures (124a, 124b), the width (W1) of the column layer (162) may be smaller than the width of the roof layer (163). In this case, the side of the column layer (162) may extend into the interior of the first protrusion (124) from the side of the roof layer (163) and be located within the plurality of first undercut structures (124a, 124b).

[0081] A green organic light-emitting layer (122g) and a green cathode electrode (123g) are deposited on a substrate (110) using a deposition process, and a first inorganic insulating layer (135-1) is formed on the green cathode electrode (123g). Then, the first inorganic insulating layer (135-1), the green cathode electrode (123g), and the green organic light-emitting layer (122g) can be patterned together to form a green subpixel (SPg).

[0082] A red organic light-emitting layer (122r) and a red cathode electrode (123r) are deposited on a substrate (110) using a deposition process, and a second inorganic insulating layer (135-2) is formed on the red cathode electrode (123r). Afterward, the second inorganic insulating layer (135-2), the red cathode electrode (123r), and the red organic light-emitting layer (122r) can be patterned together to form a red subpixel (SPr).

[0083] According to the embodiment, the green organic light-emitting layer (122g) and the red organic light-emitting layer (122r) can each come into contact with the side of the pillar layer (162). The width (W1) of the pillar layer (162) is reduced, and the green organic light-emitting layer (122g) and the red organic light-emitting layer (122r) can each come into contact with the side of the pillar layer (162). Accordingly, the contact area between the green anode electrode (121g) and the green organic light-emitting layer (122g), and the contact area between the red anode electrode (121r) and the red organic light-emitting layer (122r) can be increased. Since the light-emitting region (EA) is determined by the corresponding contact area, the light-emitting region (EA) of the green subpixel (SPg) and the light-emitting region (EA) of the red subpixel (SPr) can be increased. Accordingly, since the light-emitting region (EA) is increased, the lifespan and brightness are increased, and the image quality can be improved.

[0084] Meanwhile, the first inorganic insulating layer (135-1) and the first organic insulating layer (141-1) may be placed on the green organic light-emitting element (120g) in the green subpixel (SPg). For example, the first inorganic insulating layer (135-1) and the first organic insulating layer (141-1) may be placed only on the green subpixel (SPg) and not on the red subpixel (SPr) or the blue subpixel (SPb).

[0085] The second inorganic insulating layer (135-2) and the second organic insulating layer (141-2) can be placed on the red organic light-emitting diode (120r) in the red subpixel (SPr). The second inorganic insulating layer (135-2) and the second organic insulating layer (141-2) can be placed only on the red subpixel (SPr) and not on the green subpixel (SPg) or the blue subpixel (SPb).

[0086] The first inorganic insulating layer (135-1) may include two or more inorganic films (135-1a, 135-1b) each made of different materials. The second inorganic insulating layer (135-2) may include two or more inorganic films (135-2a, 135-2b) each made of different materials. For example, the first inorganic film (135-1a, 135-2a) may include SiO2, etc., and the second inorganic film (135-1b, 135-2b) may include SiNx, etc., but is not limited thereto.

[0087] In this way, the first inorganic insulating layer (135-1) and the second inorganic insulating layer (135-2) each include two or more inorganic films (135-1a, 135-1b, 135-1a, 135-2a), thereby enhancing the blocking performance against the penetration of moisture, oxygen, etc.

[0088] Meanwhile, a plurality of waterproof structures (125, 126-1, 126-2) may be positioned between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). A plurality of waterproof structures (125, 126-1, 126-2) may be placed on a first protrusion (124) positioned between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X).

[0089] A plurality of waterproof structures may include a first waterproof structure (125), a plurality of second waterproof structures (126-1, 126-2), etc.

[0090] By placing a plurality of waterproof structures, namely a first waterproof structure (125) and a plurality of second waterproof structures (126-1, 126-2), on the first protrusion (124), the penetration of moisture, oxygen, etc. can be completely blocked.

[0091] The first waterproof structure (125) may be configured such that two or more inorganic insulating layers among a plurality of inorganic insulating layers (135-1, 135-2) are superimposed on the roof layer (163) of the first protrusion (124).

[0092] As illustrated in FIG. 2, a first inorganic insulating layer (135-1) and a second inorganic insulating layer (135-2) may be superimposed on the roof layer (163) of a first protrusion (124) positioned between a red subpixel (SPr) and a green subpixel (SPg) to form a first waterproof structure (125). For example, the second inorganic insulating layer (135-2) may be positioned on the first inorganic insulating layer (135-1).

[0093] As described above, by preventing the peeling of the membranes by means of the first waterproof structure (125) that overlaps each other, the occurrence of progressive dark spots caused by peeled foreign matter is reduced, thereby improving reliability. In addition, the penetration path of moisture, oxygen, etc. is extended, so the reliability of high-humidity products can be improved.

[0094] A first organic insulating layer (141-1) may be disposed between a first inorganic insulating layer (135-1) and a second inorganic insulating layer (135-2) on the roof layer (163) of the first protrusion (124). In this case, since one end region of the first organic insulating layer (141-1) on the first protrusion (124) has a rounded surface, one end region of the second inorganic insulating layer (135-2) on one end region of the first organic insulating layer (141-1) may also have a rounded surface.

[0095] As described above, the green subpixel (SPg), red subpixel (SPr), and blue subpixel (SPb) can be manufactured in that order. That is, a green organic light-emitting element (120g), a first inorganic insulating layer (135-1), and a first organic insulating layer (141-1) can be patterned to manufacture a green subpixel (SPg). Subsequently, a red organic light-emitting element (120r), a second inorganic insulating layer (135-2), and a second organic insulating layer (141-2) can be patterned to manufacture a red subpixel (SPr). Subsequently, as shown in FIG. 3, a blue organic light-emitting element (120b), a third inorganic insulating layer (135-3), and a third organic insulating layer (141-3) can be patterned to manufacture a blue subpixel (SPb).

[0096] Through this series of manufacturing processes, at least two inorganic insulating layers among the first inorganic insulating layer (135-1), the second inorganic insulating layer (135-2), and the third inorganic insulating layer (135-3) can be superimposed on the first protrusion (124) between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X), thereby forming a first waterproof structure (125).

[0097] For example, a first inorganic insulating layer (135-1) and a third inorganic insulating layer (135-3) may be superimposed on a first protrusion between a green subpixel (SPg) and a blue subpixel (SPb) to form a first waterproof structure. For example, a second inorganic insulating layer (135-2) and a third inorganic insulating layer (135-3) may be superimposed on a first protrusion between a blue subpixel (SPb) and a red subpixel (SPr) to form a first waterproof structure.

[0098] For example, the first inorganic insulating layer (135-1) and the second inorganic insulating layer (135-2) may be superimposed on the first protrusion (124) between the red subpixel (SPr) and the green subpixel (SPg) to form the first waterproof structure (125).

[0099] As illustrated in FIG. 2, the first waterproof structure (125) may further include an island insulation pattern (not shown) in addition to the first inorganic insulation layer (135-1) and the second inorganic insulation layer (135-2). The island insulation pattern may be placed on the second inorganic insulation layer (135-2). The island insulation pattern may be formed by the same patterning process with the same material as the third inorganic insulation layer (135-3) formed by patterning in the blue subpixel (SPb).

[0100] Accordingly, the first waterproof structure (125) shown in FIG. 2 is formed by the superposition of three inorganic insulating layers, including an island insulating pattern, so the moisture blocking performance, such as moisture and oxygen, can be further enhanced.

[0101] Meanwhile, a plurality of second waterproof structures (126-1, 126-2) may be disposed on the side of the first protrusion (124). A plurality of second waterproof structures (126-1, 126-2) may be disposed on a plurality of first undercut structures (124a, 124b) of the first protrusion (124).

[0102] When films containing various materials are stacked, the penetration path of moisture, oxygen, etc., may penetrate through the interface where the organic insulating layer (141-1, 141-2) and the inorganic insulating layer (135-1, 135-2) meet, or through the material itself of the organic insulating layer (141-1, 141-2). Since the first waterproof structure (125) is located at the interface, oxygen, moisture, etc., may penetrate along the interface. The first waterproof structure (125) is formed with an overlapping structure of the inorganic insulating layer (135-1, 135-2), so that the penetration path may be extended.

[0103] Even if moisture, oxygen, etc. penetrate through the first waterproof structure (125), the second waterproof structure (126-1, 126-2) may have an area where there is no interface between the organic insulating layer (141-1, 141-2) and the inorganic insulating layer (135-1, 135-2). Accordingly, moisture, oxygen, etc. can be completely blocked by the second waterproof structure (126-1, 126-2). For example, the area without such an interface may be the lower side of the roof layer (163) and / or the side of the column layer (162).

[0104] The interface may be a barrier portion of a waterproof structure that can be secured when the deposition is performed at a greater angle relative to the horizontal plane of the substrate (110) than a constant deposition angle by an angle limiting plate of the evaporation source during the deposition process. For example, when the etching depth of the lower side of the roof layer (163) is 0.5 μm and the height of the pillar layer (162) is 0.5 μm, the interface may be a barrier portion that can be secured when the deposition is performed at a deposition angle of 45º or more.

[0105] One of the multiple inorganic insulating layers (135-1, 135-2) is formed into an inorganic film / inorganic film bonding structure by means of multiple first undercut structures (124a, 124b), thereby forming multiple second waterproof structures (126-1, 126-2). That is, the inorganic insulating layer is positioned on the side of the column layer (162) and the lower side of the roof layer (163) in the multiple first undercut structures (124a, 124b), thereby forming multiple second waterproof structures (126-1, 126-2) having an inorganic film / inorganic film bonding structure.

[0106] Meanwhile, a blocking structure (136-1, 136-2) may be placed in the edge area of ​​the first protrusion (124). A blocking structure (136-1, 136-2) may be placed in the edge area of ​​the column layer (162) of the first protrusion (124).

[0107] The blocking structure (136-1, 136-2) may include at least one blocking layer (113) for forming an undercut structure that extends inward from the side of the column layer (162). By the blocking layer (113) extending inward from the side of the column layer (162), the blocking structure (136-1, 136-2) having an undercut structure may be formed. The blocking layer (113) may include silicon-based inorganic materials, metals, etc. Aluminum (Al), molybdenum (Mo), molybdenum alloys, etc. may be used as metals, but are not limited thereto.

[0108] The first protrusion (14) has not only waterproofing properties but also current leakage blocking properties. Nevertheless, a blocking structure (136-1, 136-2) may be provided to double-strengthen the blocking of current leakage. The blocking structure (136-1, 136-2) may be formed through the same process as the blocking structure (137-1, 137-2) shown in FIG. 3. If the image quality is not affected by lateral leakage current, the blocking structure (137-1, 137-2) may be omitted. In such a case, the blocking structure (136-1, 136-2) may also be omitted, but this is not limited thereto.

[0109] Lateral leakage current between the red subpixel (SPr) and the green subpixel (SPg) can be prevented by the blocking structure (136-1, 136-2). The lateral leakage current may be a leakage current flowing between adjacent subpixels (SPr, SPg) along the first direction (X). Additionally, an electrical short circuit between the anode electrodes (121r, 121g) and the cathode electrodes (123r, 123g) in the red subpixel (SPr) and the green subpixel (SPg) can be prevented by the blocking structure (136-1, 136-2). Thus, color staining caused by leakage current can be improved by using the blocking structure (136-1, 136-2).

[0110] FIG. 3 is a cross-sectional view illustrating an organic light-emitting display device according to a second embodiment. FIG. 3 may be a cross-sectional view taken along the line B-B' in FIG. 1. FIG. 4 is a cross-sectional view illustrating an organic light-emitting display device according to a third embodiment. FIG. 4 may be a cross-sectional view taken along the line C-C' in FIG. 1.

[0111] FIG. 3 illustrates a cross-sectional structure in the region between multiple blue subpixels (SPb) in the second direction (Y). The cross-sectional structure in the region between multiple red subpixels (SPr) in the second direction (Y) and the region between multiple green subpixels (SPg) in the second direction (Y) may be identical or similar to the cross-sectional structure in the region between multiple blue subpixels (SPb) in the second direction (Y) (Fig. 3).

[0112] As illustrated in FIGS. 1 and 3, a plurality of second protrusions (127) may be disposed on a substrate (110) between a plurality of blue subpixels (SPb) in the second direction (Y), or at least between a non-display area (NAA) and a display area (AA). The second protrusions (127) may be provided in the form of a plurality of dummy pixels (SPrd, SPgd, SPbd) in the non-display area (NAA) which is vulnerable to water, thereby enhancing the water resistance function during color-specific patterns. The shape of the pattern may be provided in the first direction (X) or in the first direction (X) and the second direction (Y).

[0113] The second protrusion (127) may have a plurality of second undercut structures (127a, 127b). For example, the plurality of second undercut structures (127a, 127b) may be formed on the side of the second protrusion (127).

[0114] The second protrusion (127) may include a column layer (162) and a roof layer (163). The second protrusion (127) including the column layer (162) and the roof layer (163) may have the same shape as the first protrusion (124) shown in FIG. 2.

[0115] A connection structure (130-1, 130-2) linked to the structure of the second protrusion (127) can be placed between multiple subpixels (SPr, SPg, SPb) in the form of stripes of the same color. Although there are differences depending on the product, if the screen size is 8 inches or more diagonally, the connection structure (130-1, 130-2) is used to connect the auxiliary electrode and the first power wiring between the manufacturing processes, thereby improving the uniformity of the screen brightness.

[0116] As illustrated in FIG. 4, subpixels (SPb) of the same color can be separated by a pillar layer (162). In this case, the pillar layer (162) can serve as a bank.

[0117] The connection structure (130-1, 130-2) may further include a bottom layer. The bottom layer may be placed below the column layer (162). The bottom layer may include an auxiliary electrode made of a material with excellent electrical conductivity, such as metal. Although not illustrated, the auxiliary electrode may be electrically connected to a first power wiring to which a first potential voltage is supplied.

[0118] Meanwhile, as illustrated in FIG. 4, a pillar layer (162) having a bank function may be placed below a second protrusion (127) between a plurality of subpixels (SPb) in the second direction (Y). A third inorganic insulating layer (135-3) and a third organic insulating layer (141-3) may be placed on a plurality of green subpixels (SPg) in the second direction (Y) and on a plurality of second protrusions (127). That is, an inorganic film and an organic film are formed and patterned on a substrate (110) so that a third inorganic insulating layer (135-3) and a third organic insulating layer (141-3) may be placed on a plurality of green subpixels (SPg) in the second direction (Y) and on a plurality of second protrusions (127).

[0119] As illustrated in FIG. 3, a plurality of third waterproof structures (128-1, 128-2) may be disposed on the side of the second protrusion (127). A plurality of third waterproof structures (128-1, 128-2) may be disposed on a plurality of second undercut structures (127a, 127b) of the second protrusion (127).

[0120] A third inorganic insulating layer (135-3) can be formed into an inorganic film / inorganic film bonding structure by means of a plurality of second undercut structures (127a, 127b), thereby forming a plurality of third waterproof structures (128-1, 128-2). That is, the third inorganic insulating layer (135-3) is positioned on the side of the column layer (162) and the lower side of the roof layer (163) in the plurality of second undercut structures (127a, 127b), thereby forming a plurality of third waterproof structures (128-1, 128-2) having an inorganic film / inorganic film bonding structure.

[0121] For example, the third-1 waterproof structure (128-1) may be configured such that the third inorganic insulating layer (135-3) is formed as an inorganic film / inorganic film bonding structure by the second-1 undercut structure (127a). For example, the third-2 waterproof structure (128-2) may be configured such that the third inorganic insulating layer (135-3) is formed as an inorganic film / inorganic film bonding structure by the second-2 undercut structure (127b).

[0122] Since multiple third waterproof structures (128-1, 128-2) have a bonded structure of inorganic film / inorganic film, the penetration paths of moisture, oxygen, etc. are increased, so the penetration blocking performance can be further enhanced.

[0123] Meanwhile, a blocking structure (137-1, 137-2) may be placed in the edge area of ​​the second protrusion (127). A blocking structure (137-1, 137-2) may be placed in the edge area of ​​the column layer (162) of the second protrusion (127).

[0124] The blocking structure (137-1, 137-2) may include at least one blocking layer (113) for forming an undercut structure that extends inward from the side of the column layer (162). By the blocking layer (113) extending inward from the side of the column layer (162), the blocking structure (137-1, 137-2) having an undercut structure can be formed.

[0125] An electrical short circuit between the blue anode electrode (121b) and the blue cathode electrode (123b) in the blue subpixel (SPb) can be prevented by the blocking structure (137-1, 137-2). Therefore, by using the blocking structure (137-1, 137-2), operational failures or light emission failures caused by an electrical short circuit between the blue anode electrode (121b) and the blue cathode electrode (123b) can be prevented, thereby increasing product reliability.

[0126] Meanwhile, as illustrated in FIG. 4, a second protrusion (127), a connecting structure (130-1, 130-2), a third waterproof structure (128-1, 128-2), etc. may not be arranged between some of the blue subpixels (SPb) among the plurality of blue subpixels (SPb) in the second direction (Y).

[0127] As illustrated in FIGS. 1 and 4, a plurality of blue subpixels (SPb) in the second direction (Y) may be arranged over the entire area of ​​a stripe pattern of the same color. Along the second direction (Y) of the stripe pattern, a second protrusion (127), a connecting structure (130-1, 130-2), a third waterproof structure (128-1, 128-2), etc. may be arranged in units of three blue subpixels or three row lines.

[0128] As shown in FIG. 4, since the second protrusion (127), connecting structure (130-1, 130-2), and third waterproof structure (128-1, 128-2) are not arranged, the blue organic light-emitting layer (122b) or blue cathode electrode (123b) arranged on the pillar layer (162) can be continuously connected without interruption to the adjacent blue subpixel (SPb).

[0129] Meanwhile, a blocking structure (138-1, 138-2) may be placed in the edge area of ​​the column layer (162). The blocking structure (138-1, 138-2) may be formed through the same process as the blocking structure (136-1, 136-2, 137-1, 137-2) formed in the edge area of ​​the column layer (162) of the first protrusion (124) shown in FIG. 2 or the column layer (162) of the second protrusion (127) shown in FIG. 3, but is not limited thereto.

[0130] delete

[0131] FIG. 5 is a schematic plan view illustrating an organic light-emitting display device according to a second embodiment.

[0132] The second embodiment is identical to the first embodiment (Fig. 1) except that the width (W2) between each of the light-emitting regions (EA) of the plurality of subpixels (SPr, SPg, SPb) on the first direction (X) is increased.

[0133] As will be explained later, a plurality of first banks may be arranged between a plurality of subpixels (SPr, SPg, SPb) in the first direction (X). Since the width of the first bank is greater than the width of the pillar layer of the first protrusion, the light-emitting region (EA) in the corresponding subpixel (SPr, SPg, SPb) may be reduced due to the increase in the width of the first bank. Accordingly, in the second embodiment (Fig. 5), the width (W2) between the light-emitting regions (EA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first direction (X) may be greater than the width (W1) between the light-emitting regions (EA) of each of the plurality of subpixels (SPr, SPg, SPb) in the first embodiment (Fig. 1).

[0134] 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. FIG. 6 and FIG. 7 are cross-sectional views taken along the A-A' line and the B-B' line in FIG. 5, respectively.

[0135] As illustrated in FIGS. 1, 6 and 7, a plurality of first banks (111-1) may be placed on a substrate (110) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and a plurality of second banks (111-2) may be placed on a substrate (110) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0136] A plurality of first protrusions (124) may be placed on a plurality of first banks (111-1) between a plurality of subpixels (SPr, SPg, SPb) in a first direction (X), and a plurality of second protrusions (127) may be placed on a plurality of second protrusions (127) between a plurality of subpixels (SPr, SPg, SPb) in a second direction (Y).

[0137] Since the plurality of second banks (111-2), the plurality of first protrusions (124) and the plurality of second protrusions (127) have already been described, a detailed description is omitted.

[0138] As shown in FIG. 6, the width (W2) of the first bank (111-1) may be larger than the width (W1) of the column layer (162) of the first protrusion (124).

[0139] A red organic light-emitting element (120r) may be placed in a red subpixel (SPr), and a green organic light-emitting element (120g) may be placed in a green subpixel (SPg). The red organic light-emitting element (120r) may include a red anode electrode (121r), a red organic light-emitting layer (122r), a red cathode electrode (123r), etc., and the green organic light-emitting element (120g) may include a green anode electrode (121g), a green organic light-emitting layer (122g), a green cathode electrode (123g), etc.

[0140] The red anode electrode (121r) and the green anode electrode (121g) may be spaced apart by a minimum distance (D1) to prevent electrical short circuits. The width (W1) of the column layer (162) of the first protrusion (124) may be greater than the spacing distance (D1) between the red anode electrode (121r) and the green anode electrode (121g).

[0141] The first bank (111-1) can be placed on the red anode electrode (121r) and the green anode electrode (121g). That is, the first bank (111-1) can be perpendicularly overlapped with a portion of the red anode electrode (121r) and a portion of the green anode electrode (121g), respectively. In this case, the contact area between the red anode electrode (121r) and the red organic light-emitting layer (122r) and the contact area between the green anode electrode (121g) and the green organic light-emitting layer (122g) can be reduced due to the first bank (111-1).

[0142] Additionally, the green organic light-emitting layer (122g) and / or the green cathode electrode (123g) may be in contact with the upper surface of one side of the first bank (111-1), and the red organic light-emitting layer (122r) and / or the red cathode electrode (123r) may be in contact with the upper surface of the other side of the first bank (111-1).

[0143] Even if the deposition material is deposited on the substrate (110) at a relatively small deposition angle, the ends of the red organic light-emitting layer (122r), the red cathode electrode (123r), the green organic light-emitting layer (122g), and the green cathode electrode (123g) can be formed at the entrance of the first undercut structure (124a, 124b). Accordingly, the deposition system is very simple and the unit cost of the deposition system can be greatly reduced.

[0144] Meanwhile, the first waterproof structure (125) is placed on the first protrusion (124), and a plurality of second waterproof structures (125, 126-1, 26-2) can be placed on the side of the first protrusion (124).

[0145] Meanwhile, although not illustrated, as shown in FIG. 1, the cathode electrodes (123r, 123g, 123b) of each subpixel (SPr, SPg, SPb) can be electrically connected to power wiring through a plurality of connection structures (130-1, 130-2) arranged between a plurality of subpixels (SPr, SPg, SPb) in the second direction (Y).

[0146] Connection methods and connection structures can be implemented in various ways, such as laser welding, laser removal, undercut structures on the lower part of the bank, and undercut structures on the upper part of the bank, but are not limited thereto.

[0147] Although not shown, a blocking structure may be provided in the edge area of ​​the first bank (111-1) and / or the second bank (111-2).

[0148] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the embodiments should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the embodiments are included within the scope of the embodiments.

Claims

Claim 1 An organic light-emitting display device comprising: a plurality of subpixels having different colors along a first direction and the same color along a second direction intersecting the first direction; a plurality of anode electrodes on the plurality of subpixels; a plurality of organic light-emitting layers on the plurality of anode electrodes; a plurality of cathode electrodes on the plurality of organic light-emitting layers; a plurality of inorganic insulating layers on the plurality of cathode electrodes; a plurality of first protrusions disposed between the plurality of subpixels along the first direction and having a plurality of first undercut structures on the side; a plurality of first waterproof structures on the plurality of first protrusions; and a plurality of second waterproof structures on the plurality of first undercut structures of the plurality of first protrusions; wherein the first waterproof structures are formed such that the ends of the inorganic insulating layers disposed on adjacent subpixels among the plurality of inorganic insulating layers are positioned in opposite directions relative to the upper center of the first protrusions, thereby causing the inorganic insulating layers to be vertically overlapped on the upper side of the first protrusions. Claim 2 An organic light-emitting display device according to claim 1, wherein the first protrusion comprises a column layer and a roof layer on the column layer, the first undercut structure is formed such that the width of the column layer is smaller than the width of the roof layer, and the organic light-emitting layer is disposed on the side of the column layer. Claim 3 An organic light-emitting display device according to paragraph 2, wherein the width between each of the light-emitting regions of the plurality of subpixels in the first direction is the width of the pillar layer. Claim 4 An organic light-emitting display device according to claim 1, wherein the second waterproof structure is configured such that one of the plurality of inorganic insulating layers is formed into an inorganic film / inorganic film bonding structure by the first undercut structure. Claim 5 An organic light-emitting display device according to claim 1, further comprising a plurality of second protrusions between the plurality of subpixels on the second direction. Claim 6 An organic light-emitting display device according to claim 5, further comprising a plurality of third waterproof structures on the side of the plurality of second protrusions; wherein the second protrusions comprise a column layer and a roof layer on the column layer, and a second undercut structure is formed on the side of the second protrusions by the width of the column layer being smaller than the width of the roof layer. Claim 7 An organic light-emitting display device according to claim 6, further comprising a plurality of connecting structures to the second undercut structure of the second protrusion. Claim 8 An organic light-emitting display device according to claim 5, further comprising a blocking structure in the edge region of at least one of the first protrusion and the second protrusion. Claim 9 An organic light-emitting display device according to claim 1, further comprising: a display area including a plurality of subpixels; a non-display area including a plurality of dummy subpixels; a plurality of third protrusions extending from the plurality of first protrusions along the second direction to the non-display area; and a plurality of third waterproof structures on the plurality of third protrusions. Claim 10 An organic light-emitting display device according to claim 1, further comprising a plurality of first banks below the plurality of first protrusions; wherein the organic light-emitting layer is disposed on the upper side of the first banks. Claim 11 An organic light-emitting display device according to claim 10, further comprising a plurality of second banks between the plurality of subpixels on the second direction, wherein the cathode electrodes are continuously arranged on the second banks onto subpixels adjacent to the second banks.

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