Organic light-emitting display device

Abstract

The organic light-emitting display device may include a plurality of anode electrodes in a 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 arranged between a plurality of subpixels in a first direction and having a plurality of first undercut structures on their 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. The first waterproof structure may be configured such that at least two or more inorganic insulating layers from the plurality of inorganic insulating layers overlap the first protrusions.

Description

TECHNICAL FIELD

[0001] The embodiments relate to an organic light emitting display device.

BACKGROUND ART

[0002] As the demand for using portable information media increases, attempts to apply organic light emitting display devices to various lightweight and thin information electronic apparatuses are expanding. Recently, organic light emitting display devices tend to be applied to product groups such as mobile PCs and automobiles rather than televisions and mobile phones. Organic light emitting display devices applied to mobile PCs and automobiles are required to have a long service life because they are driven with still images for a long period of time. In order to realize a long service life, it is necessary to maximize the extraction of light from the organic light emitting elements provided in the organic light emitting display device. In addition, in order to realize low cost, it is necessary to expand to a technology capable of producing organic light emitting elements not only on 8.5th generation (2200×2500 mm) substrates but also on 10.5th generation (3370×2940 mm) substrates. In order to produce long-life organic light emitting elements, sub-pixels each having a side-by-side structure while being a top emission structure must each be implemented with a structure of two or more stacks of organic light emitting elements.

[0003] Such a structure of the organic light emitting element can be obtained by a deposition apparatus using a fine metal mask (hereinafter referred to as FMM). However, the deposition method using the FMM has a problem of low productivity because the production flow must be performed only in a cluster method instead of an in-line method. In addition, there is a problem that the PPA (pixel position accuracy) in sub-pixel units between the FMM and the substrate is degraded. As a result, the EAR (emission area ratio) is small, so that the service life of the product is limited. Here, the EAR is a value obtained by dividing the light emitting area of the sub-pixel by the total area of the sub-pixel.

[0004] Therefore, the development of a new deposition method to solve the aforementioned problems, and an organic light-emitting device having a new organic light-emitting structure utilizing this new deposition method, is extremely urgent. [Overview of the project] [Problems that the invention aims to solve]

[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 novel structure.

[0007] Another objective of the embodiment is to provide an organic light-emitting device that can improve its lifespan.

[0008] Another objective of the examples is to provide an organic light-emitting device that can improve productivity and yield.

[0009] Another objective of the embodiment is to provide an organic light-emitting display device that can improve image quality.

[0010] The technical problems of the embodiments are not limited to those described in this section, but also include those that can be understood from the description of the invention. [Means for solving the problem]

[0011] To achieve the above or another objective, according to one aspect of the embodiment, the organic light-emitting display device includes 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 positioned between the plurality of subpixels in the first direction and having a plurality of first undercut structures on their 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 from the plurality of inorganic insulating layers overlap 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 by the width of the column layer being smaller than the width of the roof layer, and the organic light-emitting layer may be arranged on the side of the column layer.

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

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

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

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

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

[0018] The organic light-emitting display device may further include a shielding structure in the edge region of at least one of the protrusions, which is one of the first protrusions and the second protrusions.

[0019] The organic light-emitting display device may further include a display area containing the plurality of subpixels, a non-display area containing 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 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 positioned above the first banks.

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

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

[0023] According to at least one of the examples, the process is simplified and process costs can be reduced because it is not necessary to use FMM.

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

[0025] According to at least one of the embodiments, in an in-line type vapor deposition system, an organic light-emitting element is vapor-deposited on a large-area substrate, whereby productivity, yield and material utilization efficiency can be improved.

[0026] According to at least one of the embodiments, the width between the respective light-emitting regions of the plurality of subpixels in the first direction is reduced to the width of the pillar layer of the first protrusion, whereby the light-emitting regions are increased, the service life and brightness are increased, and image quality can be improved.

[0027] According to at least one of the embodiments, a plurality of connection structures may be arranged in first grooves of a plurality of first banks between the plurality of subpixels in the second direction. Thereby, the cathode electrode of each subpixel is electrically connected to the first power wiring by the plurality of connection structures, so that electrical connection between the cathode electrode and the first power wiring is facilitated, disconnection defects are prevented, malfunctions and light emission defects of the subpixels are prevented, and reliability can be improved.

[0028] According to at least one of the embodiments, a plurality of waterproof structures are arranged on the protrusions, so that penetration of moisture, oxygen and the like is completely blocked.

[0029] According to at least one of the embodiments, a plurality of blocking structures may be arranged at the edges of the pillar layers of the banks and / or the protrusions. Thereby, lateral leakage current and longitudinal leakage current are prevented, image quality defects such as color unevenness are prevented, and light emission efficiency and luminance are significantly improved. In addition, electrical short circuit between the anode electrode and the cathode electrode in the subpixel is prevented, malfunctions and light emission defects are prevented, and the reliability of the product can be improved.

[0030] Further scope of the applicability of the embodiments will become apparent from the following detailed description. It should be understood that various changes and modifications within the spirit and scope of the embodiments will be clearly apparent to those skilled in the art, and thus specific embodiments such as the detailed description and preferred embodiments are to be understood as being merely exemplary. [Brief Description of the Drawings]

[0031] [Figure 1] Figure 1 is a schematic plan view illustrating an organic light-emitting display device according to the first embodiment. [Figure 2] Figure 2 is a cross-sectional view illustrating an organic light-emitting display device according to the first embodiment. [Figure 3] Figure 3 is a cross-sectional view illustrating an organic light-emitting device according to the second embodiment. [Figure 4] Figure 4 is a cross-sectional view illustrating an organic light-emitting display device according to the third embodiment. [Figure 5] Figure 5 is a schematic plan view illustrating an organic light-emitting display device according to the second embodiment. [Figure 6] Figure 6 is a cross-sectional view illustrating an organic light-emitting display device according to the fourth embodiment. [Figure 7] Figure 7 is a cross-sectional view illustrating an organic light-emitting device according to the fifth embodiment.

[0032] The size, shape, and numerical values ​​of the components shown in the drawings do not necessarily match those of the actual components. Furthermore, even if the same component is shown with different sizes, shapes, and numerical values ​​in different drawings, this is merely one example on the drawing, and the same component can have the same size, shape, and numerical values ​​across different drawings. [Modes for carrying out the invention]

[0033] The embodiments disclosed herein will be described in detail below with reference to the attached drawings, but identical or similar components will be given the same reference numeral regardless of the drawing reference numerals, and redundant descriptions will be omitted. The suffixes “module” and “part” used for components in the following description are given or used interchangeably to facilitate the writing of the specification and do not have any mutually distinguishing meaning or role in themselves. The attached drawings are provided to facilitate the understanding of the embodiments disclosed herein and do not limit the technical ideas disclosed herein. Furthermore, when elements such as layers, regions, or substrates are referred to as being “on” other components, this includes those that are directly on other elements or where other intermediate elements may exist between them.

[0034] The following discloses an organic light-emitting device with a side-by-side structure manufactured using a photolithography process. Such a structure is referred to as Ph-SbS (side-by-side structure by photolithography). By using a photolithography process, there is no need to use FMM, thus simplifying the process and reducing process costs. In addition, the EAR within subpixels is increased, improving the lifespan. Furthermore, by depositing organic light-emitting elements on a large-area substrate in an in-line deposition system, productivity, yield, and material utilization efficiency are improved.

[0035] In the following, red subpixels may be named the first subpixel, green subpixels the second subpixel, and blue subpixels the third subpixel. Similarly, red organic light-emitting elements may be named the first organic light-emitting element, green organic light-emitting elements the second organic light-emitting element, and blue organic light-emitting elements the third organic light-emitting element.

[0036] In the following, the organic light-emitting display device is an upper-emitting type in which light is emitted upwards from the substrate to display an image. However, a lower-emitting type in which light is emitted downwards from the substrate to display an image is also included in the technical concept of the present invention.

[0037] Figure 1 is a schematic plan view illustrating an organic light-emitting display device according to the first embodiment.

[0038] As shown in Figure 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. The area remaining from the display area AA can be defined as a non-display area NAA.

[0039] Multiple pixels P may include, for example, multiple red subpixels SPr, multiple green subpixels SPg, multiple blue subpixels SPb, etc. Multiple subpixels SPr, SPg, and SPb may have different colors along the first direction X and the same color along the second direction Y, but are not limited to this. That is, multiple subpixels SPr, SPg, and SPb may have the same color along the second direction Y and have a long, arranged stripe pattern.

[0040] The organic light-emitting layers and cathode electrodes of the multiple organic light-emitting elements 120r, 120g, and 120b may have the same color along the second direction Y and be arranged in a long stripe pattern. For example, multiple red subpixels SPr that emit red light may be arranged in a stripe pattern along the second direction Y. For example, multiple green subpixels SPg that emit green light may be arranged in a stripe pattern along the second direction Y. For example, multiple green subpixels SPg that emit blue light may be arranged in a stripe pattern along the second direction Y.

[0041] A side-by-side organic light-emitting device is realized by arranging red subpixels SPr, green subpixels SPg, and blue subpixels SPb alternately in column-line units along a first direction X. For example, the red subpixels SPr, green subpixels SPg, and blue subpixels SPb may be arranged alternately in that order along the first direction X, but this is not limited to this arrangement.

[0042] For example, the red organic light-emitting element 120r may be placed in the red subpixel SPr, the green organic light-emitting element 120g may be placed in the green subpixel SPg, and the blue organic light-emitting element 120b may be placed in the green subpixel SPg.

[0043] Multiple subpixels SPr, SPg, and SPb can each contain an emission region EA and a non-emission region NEA. The emission region EA is the region where the organic light-emitting elements 120r, 120g, and 120b are located, and the non-emission region NEA can be defined as the remaining region excluding the emission region EA.

[0044] The red organic light-emitting element 120r, the green organic light-emitting element 120g, and the blue organic light-emitting element 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 element 120r, the green organic light-emitting element 120g, and the blue organic light-emitting element 120b may each include at least two stack structures. Each stack structure may include an organic light-emitting layer that emits light.

[0045] The organic light-emitting layer and cathode electrode may be arranged only in each of the multiple subpixels SPr, SPg, and SPb along the first direction X. That is, the organic light-emitting layer and cathode electrode may not be arranged continuously along the first direction X but may be separated from each other. In contrast, as described above, the organic light-emitting layer and cathode electrode of each of the multiple organic light-emitting elements 120r, 120g, and 120b may have the same color along the second direction Y and have a long, striped pattern. That is, the organic light-emitting layer and cathode electrode may each be arranged across the multiple subpixels SPr, SPg, and SPb along the second direction Y. That is, the organic light-emitting layer and cathode electrode may each be arranged not only in the multiple subpixels SPr, SPg, and SPb along the second direction Y but also continuously in the region between the multiple subpixels SPr, SPg, and SPb.

[0046] On the other hand, although not shown in the diagram, multiple power lines may be provided to supply power to multiple subpixels SPr, SPg, and SPb in order to supply a first potential voltage.

[0047] Multiple power wiring may include multiple first power wirings and multiple second power wirings located in the display area AA, and a third power wiring located in the non-display area NAA.

[0048] Multiple first power wires and multiple second power wires may be arranged in a matrix structure with respect to each other in the display area AA. Multiple first power wires may be arranged in the area between multiple subpixels SPr, SPg, SPb in the second direction Y, and multiple second power wires may be arranged in the area between multiple subpixels SPr, SPg, SPb in the first direction X. A third power wire can be electrically connected to the power terminal and the second power wire in the non-display area NAA.

[0049] Multiple subpixels SPr, SPg, and SPb may each include a drive circuit, such as a drive transistor.

[0050] Although not shown, further power wiring may be provided to supply a second potential voltage greater than the first potential voltage. Further power wiring may, but is not limited to, be electrically connected to the drive transistors of each subpixel SPr, SPg, and SPb.

[0051] When specific subpixels SPr, SPg, and SPb are selected by a scan transistor in response to a scan signal, light with a brightness corresponding to the current flowing through the drive transistor is emitted from the specific subpixels SPr, SPg, and SPb, utilizing the first potential voltage of multiple power lines and the second potential voltage of further power lines.

[0052] On the other hand, the multiple protrusions 124 and 127 may be arranged between the multiple subpixels SPr, SPg, and SPb. As will be described later, the protrusions may be members that protrude upward from the upper surfaces of the organic light-emitting elements 120r, 120g, and 120b of the multiple subpixels SPr, SPg, and SPb, respectively.

[0053] The multiple protrusions may include multiple first protrusions 124 and multiple second protrusions 127. The multiple first protrusions 124 may be arranged between multiple subpixels SPr, SPg, SPb in a first direction X, and the multiple second protrusions 127 may be arranged between multiple subpixels SPr, SPg, SPb in a second direction Y.

[0054] Multiple first protrusions 124 may be extended between multiple dummy subpixels SPrd, SPgd, SPbd on the non-display area NAA to form third protrusions. The non-display area NAA is vulnerable to the penetration of moisture, oxygen, etc. In this embodiment, the penetration of moisture, oxygen, etc., is prevented by providing multiple fourth waterproof structures on the third protrusions. Multiple fourth waterproof structures may be provided between multiple dummy subpixels SPrd, SPgd, SPbd in the first direction X, or between multiple dummy subpixels SPrd, SPgd, SPbd in the first direction X and multiple dummy subpixels SPrd, SPgd, SPbd in the second direction Y. The fourth waterproof structure may be identical in structure to the third waterproof structures 128-1 and 128-2 shown in Figure 3.

[0055] Multiple waterproof structures 125, 126-1, 26-2, multiple blocking structures, etc., may be arranged on the first projection 124 between multiple subpixels SPr, SPg, SPb in the first direction X. Multiple connecting structures 130-1, 130-2 may be arranged on the second projection 127 between multiple subpixels SPr, SPg, SPb in the second direction Y.

[0056] Since the first protrusion 124 is formed as a structure that can provide not only waterproofing but also electrical shielding, multiple shielding structures may be omitted. For example, if the effect on image quality due to leakage current between multiple subpixels SPr, SPg, SPb in the first direction X, i.e., lateral leakage current, is small, multiple shielding structures do not need to be placed between multiple subpixels SPr, SPg, SPb in the first direction X. The connecting structures 130-1 and 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, and 120b of the multiple subpixels SPr, SPg, and SPb.

[0057] The shielding structure may be a structure that separates the layers containing the low-resistance organic light-emitting material of each organic light-emitting element 120r, 120g, and 120b, such as a hole injection layer and a charge generation layer, to prevent electrical short circuits between the anode electrode and the cathode electrode and reduce leakage current between subpixels.

[0058] As will be described later, the shielding structure prevents lateral and vertical leakage currents between multiple subpixels SPr, SPg, and SPb. Lateral leakage current is the leakage current flowing between adjacent subpixels SPr, SPg, and SPb along the first direction X, and vertical leakage current may be the leakage current flowing between adjacent subpixels SPr, SPg, and SPb along the second direction Y. In addition, the shielding structure prevents electrical short circuits between the anode and cathode electrodes of the subpixels SPr, SPg, and SPb. Therefore, by utilizing the shielding structure, color unevenness caused by leakage current is improved, and luminous efficiency and brightness are significantly enhanced. Furthermore, electrical short circuits between the anode and cathode electrodes are prevented, preventing malfunctions and luminescence failures, and improving product reliability.

[0059] Multiple waterproof structures 125, 126-1, 26-2 may be located in the display area AA and / or the non-display area NAA. For example, multiple waterproof structures 125, 126-1, 26-2 may be located between multiple subpixels SPr, SPg, SPb on the first direction X and / or the second direction Y in the display area AA and / or the non-display area NAA. Multiple waterproof structures 125, 126-1, 26-2 may be located in the respective non-emitting areas NEA of multiple subpixels SPr, SPg, SPb on the first direction X and / or the second direction Y.

[0060] The multiple waterproof structures may include multiple first waterproof structures 125, multiple second waterproof structures 126-1, 126-2, and multiple third waterproof structures. As will be described later, the multiple first waterproof structures 125 and the multiple second waterproof structures 126-1, 126-2 may be provided on multiple first protrusions 124, and the multiple third waterproof structures may be provided on multiple second protrusions 127. The third waterproof structure can improve the reliability of the product in high-humidity environments by blocking passages through which moisture, oxygen, etc., can penetrate the connecting structures 130-1, 130-2 and degrade the connecting characteristics, or by blocking passages through which moisture, oxygen, etc., can penetrate to adjacent subpixels.

[0061] On the other hand, organic light-emitting layers are susceptible to moisture and oxygen, and if these are damaged by moisture or oxygen, the corresponding subpixels SPr, SPg, and SPb may cease to function, potentially resulting in light emission failures. If a large number of subpixels SPr, SPg, and SPb cease to function due to moisture or oxygen, display defects such as point light emission failures or area light emission failures may occur, potentially reducing the reliability of the product.

[0062] However, the multiple waterproof structures 125, 126-1, and 26-2 as shown in the embodiment prevent moisture, oxygen, etc. from penetrating the non-display area NAA and display area AA, thereby preventing malfunctions and luminescence failures of the subpixels SPr, SPg, and SPb. As a result, the organic luminescence layers of the subpixels SPr, SPg, and SPb are not affected by moisture, oxygen, etc., leading to a dramatic improvement in reliability.

[0063] On the other hand, instead of banks, columnar layers (162 in Figure 2) may be placed on the substrate between multiple subpixels SPr, SPg, and SPb in the first direction X, and banks may be placed on the substrate between multiple subpixels SPr, SPg, and SPb in the second direction Y. Alternatively, banks may not be placed on the substrate between multiple subpixels SPr, SPg, and SPb in the second direction Y, and columnar layers (162 in Figure 2) may be placed therein.

[0064] In such a case, the width W1 between the light-emitting regions EA of multiple subpixels SPr, SPg, and SPb in the first direction X becomes smaller than the width of the roof layer (163 in Figure 2), which is the width of the column layer of the first protrusion 124, thereby increasing the area of ​​the light-emitting region EA of each subpixel SPr, SPg, and SPb.

[0065] In the drawing, the dotted boxes illustrate the light-emitting region EA (or area thereof) of each subpixel SPr, SPg, and SPb, while the solid lines can illustrate multiple subpixels SPr, SPg, and SPb having a stripe pattern in which multiple waterproof structures 125, 126-1, and 26-2 are located.

[0066] The width W1 between the light-emitting regions EA may be determined by a portion of the area of ​​the multiple first protrusions 124 arranged between multiple subpixels SPr, SPg, and SPb in the first direction X, for example, by the width of the columnar layer. That is, by reducing the width W1 between the light-emitting regions EA due to the width of the columnar layer, the area of ​​the light-emitting region EA of each subpixel SPr, SPg, and SPb increases, resulting in higher brightness, increased lifespan, and the realization of a high-brightness display.

[0067] Figure 2 is a cross-sectional view illustrating an organic light-emitting device according to the first embodiment. Figure 2 is a cross-sectional view taken along the line A-A' in Figure 1.

[0068] Although not shown, the regions between multiple green subpixels SPg and multiple red subpixels SPr in the first direction X, and the regions between multiple green subpixels SPg and multiple green subpixels SPg in the first direction X, can have the same or similar structure as the regions between multiple red subpixels SPr and multiple green subpixels SPg shown in Figure 2.

[0069] As shown in Figures 1 and 2, a first protrusion 124 may be positioned on the substrate 110 between the red subpixel SPr and the green subpixel SPg in the first direction X. The first protrusion 124 may also be positioned elongated along the second direction Y between the red subpixel SPr and the green subpixel SPg in the first direction X, but is not limited to this.

[0070] The left and right sides of the first projection 124 can have shapes that are symmetrical with respect to the central normal of the first projection 124. As will be described later, this is because the roof layer 163 and the column layer 162 are formed in a single photolithography process.

[0071] The first projection 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 projection 124.

[0072] The first projection 124 may include a column layer 162 and a roof layer 163 on top of the column layer 162.

[0073] Multiple first undercut structures 124a, 124b may be formed by the column layer 162 and the roof layer 163.

[0074] To form multiple first undercut structures 124a, 124b, the column layer 162 and the roof layer 163 may be formed of materials having different etching selectivity ratios and etching rates. For example, the column 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. Therefore, when the column layer 162 and the roof layer 163 are etched after a photosensitive pattern has been formed on the roof layer 163, the sides of the column layer 162 are etched faster than the sides of the roof layer 163, which can form multiple first undercut structures 124a, 124b on the sides of the first projection 124. That is, the sides of the column layer 162 penetrate inward from the sides of the roof layer 163 towards the first projection 124, which can form multiple first undercut structures 124a, 124b.

[0075] Multiple first undercut structures 124a, 124b can have a cave shape. For example, multiple first undercut structures 124a, 124b can have a U-shaped cave shape. Therefore, the first undercut structures 124a, 124b can be referred to as caves, U-shaped caves, cave sections, etc.

[0076] The column layer 162 can be made of an inorganic insulating material. Silicon oxide-based materials or silicon nitride-based materials can be used as the inorganic insulating material.

[0077] The roof layer 162 can consist of metal, inorganic insulating material, etc. Suitable metals include titanium (Ti), molybdenum (Mo), molybdenum-titanium (MoTi), aluminum (Al), copper (Cu), and alloys thereof. Suitable inorganic insulating materials include silicon oxide-based materials and silicon nitride-based materials.

[0078] On the other hand, the red organic light-emitting element 120r may be arranged on the substrate 110 as a red subpixel SPr, and the green organic light-emitting element 120g may be arranged on the substrate 110 as a green subpixel SPg.

[0079] 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.

[0080] The red anode electrode 121r and the green anode electrode 121g may be formed before the first protrusion 124 is formed. That is, a conductive film may be formed and patterned on the substrate 110 to form the red anode electrode 121r and the green anode electrode 121g. The red anode electrode 121r and the green anode electrode 121g can be separated from each other by a minimum distance D1 so as not to cause an electrical short circuit. Thereafter, the first protrusion 124 may be formed on the substrate 110 between the red subpixel SPr and the green subpixel SPg.

[0081] As mentioned above, the first projection 124 may include a column layer 162 and a roof layer 163. In order to form multiple 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 such a case, the sides of the column layer 162 can extend inward from the sides of the roof layer 163 into the first projection 124 and be located within the multiple first undercut structures 124a, 124b.

[0082] A green organic light-emitting layer 122g and a green cathode electrode 123g may be deposited onto a substrate 110 using a vapor deposition process, and a first inorganic insulating layer 135-1 may be formed on the green cathode electrode 123g. After that, the first inorganic insulating layer 135-1, the green cathode electrode 123g, and the green organic light-emitting layer 122g may be patterned together to form a green subpixel SPg.

[0083] A red organic light-emitting layer 122r and a red cathode electrode 123r may be deposited onto a substrate 110 using a vapor deposition process, and a second inorganic insulating layer 135-2 may be formed on the red cathode electrode 123r. After that, the second inorganic insulating layer 135-2, the red cathode electrode 123r, and the red organic light-emitting layer 122r may be patterned together to form a red subpixel SPr.

[0084] According to the embodiment, the green organic light-emitting layer 122g and the red organic light-emitting layer 122r can each be in contact with the side of the columnar layer 162. The width W1 of the columnar layer 162 is reduced, allowing the green organic light-emitting layer 122g and the red organic light-emitting layer 122r to each be in contact with the side of the columnar layer 162. As a result, 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 this 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. As a result of this increase in the light-emitting region EA, the lifespan and brightness can be increased, and image quality can be improved.

[0085] On the other hand, 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 at the green subpixel SPg. For example, the first inorganic insulating layer 135-1 and the first organic insulating layer 141-1 may not be placed at the red subpixel SPr or the blue subpixel SPb, but only at the green subpixel SPg.

[0086] The second inorganic insulating layer 135-2 and the second organic insulating layer 141-2 may be placed on the red organic light-emitting element 120r at the red subpixel SPr. The second inorganic insulating layer 135-2 and the second organic insulating layer 141-2 may not be placed at the green subpixel SPg or the blue subpixel SPb, but only at the red subpixel SPr.

[0087] The first inorganic insulating layer 135-1 may include two or more inorganic films 135-1a, 135-1b, each made of a different material. The second inorganic insulating layer 135-2 may include two or more inorganic films 135-2a, 135-2b, each made of a different material. For example, the first inorganic films 135-1a, 135-2a may contain SiO2, and the second inorganic films 135-1b, 135-2b may contain SiNx, but are not limited to these materials.

[0088] Thus, by including two or more inorganic films 135-1a, 135-1b, 135-1a, and 135-2a in the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2, respectively, the barrier performance against the penetration of moisture, oxygen, and other elements can be enhanced.

[0089] On the other hand, the multiple waterproof structures 125, 126-1, and 126-2 can be located between multiple subpixels SPr, SPg, and SPb in the first direction X. The multiple waterproof structures 125, 126-1, and 126-2 may be arranged on a first projection 124 located between multiple subpixels SPr, SPg, and SPb in the first direction X.

[0090] Multiple waterproof structures may include a first waterproof structure 125, multiple second waterproof structures 126-1, 126-2, and so on.

[0091] By arranging multiple waterproof structures, namely the first waterproof structure 125 and multiple second waterproof structures 126-1, 126-2, on the first protrusion 124, the penetration of moisture, oxygen, and the like is completely blocked.

[0092] The first waterproof structure 125 may be configured such that two or more inorganic insulating layers from among a plurality of inorganic insulating layers 135-1, 135-2 overlap on the roof layer 163 of the first protrusion 124.

[0093] As shown in Figure 2, the first waterproof structure 125 can be formed by overlapping the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2 on the roof layer 163 of the first protrusion 124, which is positioned between the red subpixel SPr and the green subpixel SPg. For example, the second inorganic insulating layer 135-2 may be positioned on the first inorganic insulating layer 135-1.

[0094] As mentioned above, the overlapping first waterproof structures 125 prevent delamination of the membrane, thereby reducing the occurrence of progressive scotoma caused by delaminate foreign matter and improving reliability. In addition, the increased penetration pathways for moisture, oxygen, etc., improve reliability for high-humidity products.

[0095] The first organic insulating layer 141-1 may be placed on the roof layer 163 of the first protrusion 124 between the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2. In this case, since one side edge region of the first organic insulating layer 141-1 has a rounded surface on the first protrusion 124, one side edge region of the second inorganic insulating layer 135-2 can also have a rounded surface on one side edge region of the first organic insulating layer 141-1.

[0096] As mentioned above, the green subpixel SPg, red subpixel SPr, and blue subpixel SPb may be manufactured in that order. That is, the green organic light-emitting element 120g, the first inorganic insulating layer 135-1, and the first organic insulating layer 141-1 are patterned to manufacture the green subpixel SPg. Subsequently, the red organic light-emitting element 120r, the second inorganic insulating layer 135-2, and the second organic insulating layer 141-2 are patterned to manufacture the red subpixel SPr. Subsequently, as shown in Figure 3, the blue organic light-emitting element 120b, the third inorganic insulating layer 135-3, and the third organic insulating layer 141-3 are patterned to manufacture the blue subpixel SPb.

[0097] Through this series of manufacturing processes, at least two inorganic insulating layers from 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 the multiple subpixels SPr, SPg, and SPb in the first direction X, thereby forming the first waterproof structure 125.

[0098] For example, a first inorganic insulating layer 135-1 and a third inorganic insulating layer 135-3 may overlap 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 overlap on a first protrusion between a blue subpixel SPb and a red subpixel SPr to form a first waterproof structure.

[0099] For example, the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2 may overlap on the first protrusion 124 between the red subpixel SPr and the green subpixel SPg to form the first waterproof structure 125.

[0100] As shown in Figure 2, the first waterproof structure 125 may further include an island insulation pattern (not shown) in addition to the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2. The island insulation pattern may be placed on the second inorganic insulating layer 135-2. The island insulation pattern may be formed of the same material and by the same patterning process as the third inorganic insulating layer 135-3, which is formed by patterning with blue subpixels SPb.

[0101] Therefore, the first waterproof structure 125 shown in Figure 2 is formed by the superposition of three inorganic insulating layers, including an island insulating pattern, which further enhances the moisture barrier performance against water, oxygen, and other moisture.

[0102] On the other hand, the multiple second waterproof structures 126-1, 126-2 may be arranged on the side of the first protrusion 124. The multiple second waterproof structures 126-1, 126-2 may be arranged on the multiple first undercut structures 124a, 124b of the first protrusion 124.

[0103] When films containing multiple materials are laminated, the penetration pathways for moisture, oxygen, etc., can be through the interface where the organic insulating layers 141-1, 141-2 and the inorganic insulating layers 135-1, 135-2 meet, or through the material of the organic insulating layers 141-1, 141-2 themselves. Since the first waterproof structure 125 is located at this interface, oxygen, moisture, etc., can penetrate along this interface. The first waterproof structure 125 is formed in a structure in which the inorganic insulating layers 135-1, 135-2 overlap, which can lengthen its penetration pathway.

[0104] Even if moisture, oxygen, etc. were to penetrate through the first waterproof structure 125, the second waterproof structures 126-1 and 126-2 could have regions where there is no interface between the organic insulating layers 141-1 and 141-2 and the inorganic insulating layers 135-1 and 135-2. As a result, moisture, oxygen, etc. would be completely blocked by the second waterproof structures 126-1 and 126-2. For example, the region without such interface may be on the underside of the roof layer 163 and / or on the side of the column layer 162.

[0105] The interface may also be a barrier portion of a waterproof structure that can be secured when the deposition in the deposition process is performed at an angle greater than a certain deposition angle relative to the horizontal plane of the substrate 110 by the angle limiting plate of the evaporation source. For example, if the etching depth on the lower side of the roof layer 163 is 0.5 μm and the height of the column layer 162 is 0.5 μm, the interface may be a barrier portion that can be secured when deposition is performed at a deposition angle of 45° or more.

[0106] Multiple inorganic insulating layers 135-1, 135-2 can be formed in an inorganic film / inorganic film bonding structure by multiple first undercut structures 124a, 124b, thereby forming multiple second waterproof structures 126-1, 126-2. That is, the inorganic insulating layer can be arranged on the side of the column layer 162 and the underside of the roof layer 163 by multiple first undercut structures 124a, 124b, thereby forming multiple second waterproof structures 126-1, 126-2 having an inorganic film / inorganic film bonding structure.

[0107] Alternatively, the blocking structures 136-1 and 136-2 may be arranged in the edge region of the first projection 124. The blocking structures 136-1 and 136-2 may be arranged in the edge region of the column layer 162 of the first projection 124.

[0108] The barrier structures 136-1 and 136-2 may include at least one barrier layer 113 to form an undercut structure that extends inward from the side of the column layer 162. By the barrier layer 113 extending inward from the side of the column layer 162, the barrier structures 136-1 and 136-2 having an undercut structure can be formed. The barrier layer 113 may include silicon-based inorganic materials, metals, etc. As the metal, aluminum (Al), molybdenum (Mo), molybdenum alloys, etc. may be used, but are not limited to these.

[0109] The first protrusion 14 has not only waterproof properties but also current leakage blocking properties. Nevertheless, blocking structures 136-1 and 136-2 may be provided to further reinforce current leakage blocking. Blocking structures 136-1 and 136-2 may be formed by the same process as blocking structures 137-1 and 137-2 shown in Figure 3. If the image quality effect due to lateral leakage current is small, blocking structures 137-1 and 137-2 may be omitted. In such cases, blocking structures 136-1 and 136-2 may also be omitted, but this is not a limitation.

[0110] Lateral leakage current between the red subpixel SPr and the green subpixel SPg is prevented by the shielding structures 136-1 and 136-2. Lateral leakage current may be leakage current flowing between adjacent subpixels SPr and SPg along the first direction X. In addition, electrical short circuits between the anode electrodes 121r and 121g and the cathode electrodes 123r and 123g in the red subpixel SPr and the green subpixel SPg are prevented by the shielding structures 136-1 and 136-2. Therefore, by utilizing the shielding structures 136-1 and 136-2, color unevenness caused by leakage current can be improved.

[0111] Figure 3 is a cross-sectional view illustrating an organic light-emitting device according to the second embodiment. Figure 3 is a cross-sectional view taken along the line B-B' in Figure 1. Figure 4 is a cross-sectional view illustrating an organic light-emitting device according to the third embodiment. Figure 4 is a cross-sectional view taken along the line C-C' in Figure 1.

[0112] Figure 3 illustrates the cross-sectional structure in the region between multiple blue subpixels SPb in the second direction Y. The cross-sectional structures in the region between multiple red subpixels SPr 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 (Figure 3).

[0113] As shown in Figures 1 and 3, a plurality of second protrusions 127 may be arranged on the substrate 110 between a plurality of blue subpixels SPb in the second direction Y, or at least between the non-display area NAA and the display area AA. The second protrusions 127 may be provided in the form of a plurality of dummy pixels SPrd, SPgd, SPbd in the water-vulnerable non-display area NAA to enhance the water-resistant function when a color-specific pattern is formed. The pattern may be provided in the first direction X, or in the first direction X and the second direction Y.

[0114] The second projection 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 projection 127.

[0115] The second projection 127 may include a column layer 162 and a roof layer 163. The second projection 127, including the column layer 162 and the roof layer 163, may have the same shape as the first projection 124 shown in Figure 2.

[0116] Connecting structures 130-1 and 130-2, which are linked to the structure of the second protrusion 127, may be placed between multiple subpixels SPr, SPg, and SPb in the form of stripes of the same color. Depending on the product, if the screen size is 8 inches or more based on the diagonal, the uniformity of screen brightness can be improved by using connecting structures 130-1 and 130-2 to connect the auxiliary electrodes and the first power wiring during the manufacturing process.

[0117] As illustrated in Figure 4, the columnar layer 162 separates subpixels SPb of the same color. In this case, the columnar layer 162 can function as a bank.

[0118] The connecting structures 130-1 and 130-2 may further include a bottom layer. The bottom layer may be located below the column layer 162. The bottom layer may include auxiliary electrodes made of a material with good electrical conductivity, such as metal. Although not shown, the auxiliary electrodes are electrically connected to a first power line to which a first potential voltage is supplied.

[0119] On the other hand, as shown in Figure 4, the columnar layer 162 having a bank function may be positioned below the second protrusion 127 between a plurality of subpixels SPb in the second direction Y. The third inorganic insulating layer 135-3 and the third organic insulating layer 141-3 may be positioned on a plurality of green subpixels SPg and a plurality of second protrusions 127 in the second direction Y. That is, the inorganic film and the organic film may be formed and patterned on the substrate 110, and the third inorganic insulating layer 135-3 and the third organic insulating layer 141-3 may be positioned on a plurality of green subpixels SPg and a plurality of second protrusions 127 in the second direction Y.

[0120] As shown in Figure 3, the multiple third waterproof structures 128-1 and 128-2 may be arranged on the side of the second protrusion 127. The multiple third waterproof structures 128-1 and 128-2 may also be arranged on the multiple second undercut structures 127a and 127b of the second protrusion 127.

[0121] Multiple third waterproof structures 128-1 and 128-2 can be formed by the third inorganic insulating layer 135-3 being formed in an inorganic film / inorganic film bonding structure by a plurality of second undercut structures 127a and 127b. That is, multiple third inorganic insulating layers 135-3 can be arranged on the sides of the column layer 162 and the underside of the roof layer 163 by a plurality of second undercut structures 127a and 127b, thereby forming multiple third waterproof structures 128-1 and 128-2 having an inorganic film / inorganic film bonding structure.

[0122] For example, the third-first 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-first undercut structure 127a. For example, the third-second 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-second undercut structure 127b.

[0123] Since multiple third waterproof structures 128-1 and 128-2 have an inorganic film / inorganic film bonding structure, the penetration pathways for moisture, oxygen, etc. are increased, further enhancing the penetration blocking performance.

[0124] Alternatively, the blocking structures 137-1 and 137-2 may be arranged in the edge region of the second projection 127. The blocking structures 137-1 and 137-2 may be arranged in the edge region of the column layer 162 of the second projection 127.

[0125] The barrier structures 137-1 and 137-2 may include at least one barrier layer 113 to form an undercut structure that extends inward from the side of the column layer 162. The barrier layer 113 extends inward from the side of the column layer 162 to form the barrier structures 137-1 and 137-2 having an undercut structure.

[0126] Electrical short circuits between the blue anode electrode 121b and the blue cathode electrode 123b in the blue subpixel SPb are prevented by the shielding structures 137-1 and 137-2. Therefore, by utilizing the shielding structures 137-1 and 137-2, malfunctions and luminescence failures caused by electrical short circuits between the blue anode electrode 121b and the blue cathode electrode 123b can be prevented, thereby improving the reliability of the product.

[0127] On the other hand, as shown in Figure 4, the second protrusion 127, connecting structures 130-1, 130-2, third waterproof structures 128-1, 128-2, etc., do not necessarily have to be placed between some of the blue subpixels SPb in the second direction Y.

[0128] As shown in Figures 1 and 4, multiple blue subpixels SPb in the second direction Y may be arranged across the entire area of ​​a stripe pattern of the same color. The second protrusions 127, connecting structures 130-1, 130-2, third waterproof structures 128-1, 128-2, etc., may be arranged in units of three blue subpixels or three row lines along the second direction Y of the stripe pattern.

[0129] As shown in Figure 4, since the second protrusion 127, connecting structures 130-1 and 130-2, and third waterproof structures 128-1 and 128-2 are not arranged, the blue organic light-emitting layer 122b and blue cathode electrode 123b arranged on the column layer 162 can be continuously connected to the adjacent blue subpixel SPb without interruption.

[0130] On the other hand, the blocking structures 138-1 and 138-2 may be arranged in the edge region of the column layer 162. The blocking structures 138-1 and 138-2 may be formed by the same process as the blocking structures 136-1, 136-2, 137-1, and 137-2 formed in the edge region of the column layer 162 of the first protrusion 124 shown in Figure 2 and the column layer 162 of the second protrusion 127 shown in Figure 3, but are not limited to this.

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

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

[0133] As will be described later, multiple first banks may be arranged between multiple subpixels SPr, SPg, and SPb in the first direction X. Since the width of the first bank is greater than the width of the column layer of the first protrusion, increasing the width of the first bank may reduce the light-emitting region EA of the subpixels SPr, SPg, and SPb. As a result, the width W2 between each light-emitting region EA of the multiple subpixels SPr, SPg, and SPb in the first direction X in the second embodiment (Figure 5) can be greater than the width W1 between each light-emitting region EA of the multiple subpixels SPr, SPg, and SPb in the first direction X in the first embodiment (Figure 1).

[0134] Figure 6 is a cross-sectional view illustrating an organic light-emitting device according to the fourth embodiment. Figure 7 is a cross-sectional view illustrating an organic light-emitting device according to the fifth embodiment. Figures 6 and 7 are cross-sectional views obtained by cutting along the A-A' line and the B-B' line in Figure 5, respectively.

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

[0136] Multiple first protrusions 124 may be arranged on multiple first banks 111-1 between multiple subpixels SPr, SPg, SPb in a first direction X, and multiple second protrusions 127 may be arranged on multiple second protrusions 127 between multiple subpixels SPr, SPg, SPb in a second direction Y.

[0137] Since the multiple second banks 111-2, the multiple first protrusions 124, and the multiple second protrusions 127 have already been described, a detailed explanation will be omitted.

[0138] As shown in Figure 6, the width W2 of the first bank 111-1 may be greater than the width W1 of the column layer 162 of the first projection 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 placed at a minimum distance D1 apart to prevent electrical short circuits. The width W1 of the columnar layer 162 of the first protrusion 124 may be greater than the isolation distance D1 between the red anode electrode 121r and the green anode electrode 121g.

[0141] The first bank 111-1 may be positioned on the red anode electrode 121r and the green anode electrode 121g. That is, the first bank 111-1 can overlap perpendicularly with a portion of the red anode electrode 121r and a portion of the green anode electrode 121g, respectively. In this case, the first bank 111-1 reduces 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.

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

[0143] Even when the deposition material is deposited on the substrate 110 at a relatively small deposition angle, the edges 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 entrances of the first undercut structures 124a and 124b. This makes the deposition system very simple and significantly reduces the cost of the deposition system.

[0144] On the other hand, the first waterproof structure 125 may be arranged on the first protrusion 124, and the multiple second waterproof structures 125, 126-1, and 26-2 may be arranged on the sides of the first protrusion 124.

[0145] On the other hand, although not shown in the figures, as illustrated in Figure 1, the cathode electrodes 123r, 123g, and 123b of each subpixel SPr, SPg, and SPb can be electrically connected to the power wiring by multiple connecting structures 130-1 and 130-2 arranged between multiple subpixels SPr, SPg, and SPb in the second direction Y.

[0146] The connection method and structure can be implemented in various ways, such as laser welding, laser removal, an undercut structure at the bottom of the bank, or an undercut structure at the top of the bank, but are not limited to these.

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

[0148] The detailed description above should not be interpreted restrictively in any way, but should be considered illustrative. The scope of the examples should be determined by a reasonable analysis of the attached claims, and all modifications within the equivalent scope of the examples are included within the scope of the examples.

Claims

1. A plurality of subpixels having different colors along a first direction and the same color along a second direction intersecting the first direction, The plurality of subpixels are provided with a plurality of anode electrodes, Multiple organic light-emitting layers are provided on the multiple anode electrodes, Multiple cathode electrodes are placed on the plurality of organic light-emitting layers, Multiple inorganic insulating layers are placed on the multiple cathode electrodes, A plurality of first protrusions are arranged between the plurality of subpixels in the first direction and have a plurality of first undercut structures on their sides, Multiple first waterproof structures are provided on the multiple first protrusions, The plurality of first undercut structures of the plurality of first protrusions include a plurality of second waterproof structures, The first waterproof structure is an organic light-emitting display device in which at least two or more inorganic insulating layers from the plurality of inorganic insulating layers overlap the first protrusion.

2. The first protrusion includes a column layer and a roof layer on the column layer. The first undercut structure is formed by the width of the column layer being smaller than the width of the roof layer. The organic light-emitting display device according to claim 1, wherein the organic light-emitting layer is disposed on the side of the columnar layer.

3. The organic light-emitting device according to claim 2, wherein the width between each light-emitting region of the plurality of subpixels in the first direction is the width of the columnar layer.

4. The organic light-emitting device according to claim 1, wherein the second waterproof structure is configured such that one of the plurality of inorganic insulating layers is formed as an inorganic film / inorganic film junction structure by the first undercut structure.

5. The organic light-emitting display device according to claim 1, further comprising a plurality of second protrusions between the plurality of subpixels in the second direction.

6. The plurality of third waterproof structures are further included on the sides of the plurality of second protrusions, The second protrusion includes a column layer and a roof layer on the column layer. The organic light-emitting display device according to claim 5, wherein the width of the column layer is smaller than the width of the roof layer, so that a second undercut structure is formed on the side of the second protrusion.

7. The organic light-emitting display device according to claim 5, further comprising a plurality of connecting structures in the second undercut structure of the second protrusion.

8. The organic light-emitting device according to claim 5, further comprising a shielding structure in the edge region of at least one of the first and second protrusions.

9. A display area including the aforementioned multiple subpixels, A hidden region containing multiple dummy subpixels, A plurality of third protrusions extending from the plurality of first protrusions along the second direction to the non-display area, The organic light-emitting display device according to claim 1, further comprising a plurality of third waterproof structures on the plurality of third protrusions.

10. The plurality of first protrusions further include a plurality of first banks below them, The organic light-emitting display device according to claim 1, wherein the organic light-emitting layer is disposed on the upper side of the first bank.

11. The plurality of subpixels in the second direction further include a plurality of second banks, The organic light-emitting display device according to claim 10, wherein the cathode electrodes are arranged continuously on the second bank and on subpixels adjacent to the second bank.

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