Organic light emitting display device

Abstract

The organic light emitting display device may include: a plurality of anode electrodes on a plurality of sub-pixels; 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 sub-pixels in the first direction and having a plurality of first undercut structures on a side portion; the plurality of first waterproof structures are located on the plurality of first protruding parts; and a plurality of second waterproof structures located at the plurality of first undercut structures of the plurality of first protrusions. The first waterproof structure is formed by overlapping at least two or more inorganic insulating layers among the plurality of inorganic insulating layers on the first protruding portion.

Description

Technical Field

[0001] The embodiments relate to organic light-emitting display devices. Background Technology

[0002] With the increasing demand for portable information media, attempts to apply organic light-emitting diode (OLED) displays to various thin and light electronic devices are expanding. Recently, compared to TVs or mobile phones, OLED displays have shown a trend of being applied to product groups such as mobile PCs and automobiles. Since OLED displays used in mobile PCs or automobiles are driven with static images for extended periods, a long lifespan is required. To achieve this long lifespan, the light extraction from the organic light-emitting elements (OLEDs) in the OLED display should be maximized. Furthermore, to reduce costs, technologies for producing OLEDs on substrates of both 8.5 generation (2200×2500mm) and 10.5 generation (3370×2940mm) are needed. To produce long-life OLEDs, each sub-pixel with a top-emission structure and a side-by-side structure needs to be implemented using a structure of two or more stacks of OLEDs.

[0003] This type of organic light-emitting display device can be obtained using a deposition apparatus employing fine metal film (FMM). However, the FMM deposition method necessitates cluster-based rather than in-line production, resulting in low production efficiency. Furthermore, it reduces the pixel position accuracy (PPA) of the sub-pixel units between the FMM and the substrate. Consequently, the emission arearatio (EAR) is small, limiting product lifespan. EAR is the value of the emission area of ​​a sub-pixel divided by the total area of ​​the sub-pixels.

[0004] Therefore, there is an urgent need to develop new deposition methods to solve the aforementioned problems, as well as organic light-emitting display devices with novel organic light-emitting element structures that use these new deposition methods. Summary of the Invention

[0005] Technical problems to be solved One objective of this embodiment is to address the aforementioned and other problems.

[0006] Another objective of this embodiment is to provide an organic light-emitting display device with a novel structure.

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

[0008] Another objective of this embodiment is to provide an organic light-emitting display device that can improve production efficiency and yield.

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

[0010] The technical problems to be solved by the embodiments are not limited to those described in this project, but include those that can be understood through the invention.

[0011] Technical solution To achieve the above or other objectives, according to one aspect of an embodiment, an organic light-emitting display device includes: a plurality of sub-pixels having different colors along a first direction and the same color along a second direction intersecting the first direction; a plurality of anode electrodes located at the plurality of sub-pixels; a plurality of organic light-emitting layers located on the plurality of anode electrodes; a plurality of cathode electrodes located on the plurality of organic light-emitting layers; a plurality of inorganic insulating layers located on the plurality of cathode electrodes; a plurality of first protrusions disposed between the plurality of sub-pixels in the first direction and having a plurality of first undercut structures on their sides; a plurality of first waterproof structures located on the plurality of first protrusions; and a plurality of second waterproof structures located at the plurality of first undercut structures of the plurality of first protrusions, wherein the first waterproof structures are formed by at least two of the plurality of inorganic insulating layers overlapping on the first protrusions.

[0012] The first protrusion may include: a pillar layer; and a top layer located on the pillar layer, wherein the first undercut structure is formed by the width of the pillar layer being smaller than the width of the top layer, and the organic light-emitting layer may be disposed on the side of the pillar layer.

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

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

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

[0016] The organic light-emitting display device may further include: a plurality of third waterproof structures located on the sides of the plurality of second protrusions, the second protrusions including: a pillar layer; and a top layer located on the pillar layer, the width of the pillar layer being smaller than the width of the top layer, to form a second undercut structure on the sides of the second protrusions.

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

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

[0019] The organic light-emitting display device may further include: a display area including the plurality of sub-pixels; a non-display area including a plurality of virtual sub-pixels; 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 located at the plurality of third protrusions.

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

[0021] The organic light-emitting display device may further include: a plurality of second dikes located between the plurality of sub-pixels in the second direction, wherein the cathode electrode may be continuously disposed on the second dikes toward the sub-pixels adjacent to the second dikes.

[0022] Beneficial effects The effects of the organic light-emitting display device according to the embodiment are explained below.

[0023] According to at least one of the embodiments, since no FMM is required, the process is simple and process costs can be reduced.

[0024] According to at least one of the embodiments, since FMM is not required, the EAR within the sub-pixel is increased, which can improve the lifetime.

[0025] According to at least one of the embodiments, in a linear deposition system, organic light-emitting elements are deposited on a large-area substrate, thereby improving production efficiency, yield, and material utilization efficiency.

[0026] According to at least one of the embodiments, the width between the light-emitting areas of each of the plurality of sub-pixels in the first direction can be reduced to the width of the pillar layer of the first protrusion. Therefore, the corresponding light-emitting area increases, thereby increasing lifespan and brightness and improving image quality.

[0027] According to at least one embodiment, multiple connection structures may be disposed at the first grooves of multiple first dikes between multiple sub-pixels in the second direction. Therefore, since the cathode electrode of each sub-pixel is electrically connected to the first power line through multiple connection structures, the electrical connection between the cathode electrode and the first power line is easy, which can prevent wire breakage defects, thereby preventing sub-pixel malfunctions or light emission failures and improving reliability.

[0028] According to at least one of the embodiments, multiple waterproof structures can be provided at the protrusions so that the penetration of moisture, oxygen, etc. can be completely blocked.

[0029] According to at least one of the embodiments, multiple blocking structures are disposed at the column edges of the embankment and / or protrusion. This prevents lateral or longitudinal leakage current, avoids image quality defects such as color spots, and significantly improves luminous efficiency and brightness. Furthermore, since electrical short circuits between the anode and cathode electrodes within the corresponding sub-pixels are prevented, operational or luminous failures are prevented, and product reliability is improved.

[0030] The additional scope of application possibilities of the embodiments will become clear from the following detailed description. However, those skilled in the art will clearly understand that various modifications and alterations can be made within the spirit and scope of the embodiments. Therefore, it should be understood that the detailed description and specific embodiments, such as preferred embodiments, are provided as examples only. Attached Figure Description

[0031] Figure 1 A plan view of the organic light-emitting display device according to the first embodiment is shown in schematic form.

[0032] Figure 2 A cross-sectional view of an organic light-emitting display device according to a first embodiment is shown.

[0033] Figure 3 A cross-sectional view of an organic light-emitting display device according to a second embodiment is shown.

[0034] Figure 4 A cross-sectional view of an organic light-emitting display device according to a third embodiment is shown.

[0035] Figure 5 A plan view of the organic light-emitting display device according to the second embodiment is shown for schematic purposes.

[0036] Figure 6 A cross-sectional view of an organic light-emitting display device according to a fourth embodiment is shown.

[0037] Figure 7 A cross-sectional view of an organic light-emitting display device according to a fifth embodiment is shown.

[0038] The size, shape, and values ​​of the components shown in the accompanying drawings may differ from the actual dimensions. Furthermore, even if the same component is shown in different sizes, shapes, and values ​​in the accompanying drawings, this is merely an example; for the same component, the sizes, shapes, and values ​​may be the same across different drawings. Detailed Implementation

[0039] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. Regardless of the drawing numbers, the same or similar constituent elements will be given the same reference numerals, and repeated descriptions of them will be omitted. The suffixes "module" and "part" used for constituent elements in the following description are assigned or used interchangeably for the sake of simplicity in writing the specification, and do not necessarily have different meanings or functions. Furthermore, the accompanying drawings are provided to facilitate a clearer understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the drawings. Additionally, when an element such as a layer, region, or substrate is described as existing "on" other constituent elements, this includes elements that can exist directly on other elements or where there are other intermediate elements between them.

[0040] The following discloses an organic light-emitting display device with a side-by-side structure fabricated using photolithography. This structure is called Ph-SbS (Side by side structure by photolithography). By utilizing photolithography, the use of a partial matrix metallization (FMM) is eliminated, thus simplifying the process and reducing costs. Furthermore, the increased EAR within the subpixels improves lifetime. Moreover, in a linear deposition system, organic light-emitting elements are deposited on a large-area substrate, thereby improving production efficiency, yield, and material utilization efficiency.

[0041] Hereinafter, the red subpixel can be named the first subpixel, the green subpixel can be named the second subpixel, and the blue subpixel can be named the third subpixel. Furthermore, the red organic light-emitting element can be named the first organic light-emitting element, the green organic light-emitting element can be named the second organic light-emitting element, and the blue organic light-emitting element can be named the third organic light-emitting element.

[0042] Hereinafter, the organic light-emitting display device refers to the top-emitting method that emits light toward the upper part of the substrate to display an image, but the bottom-emitting method that emits light toward the lower part of the substrate to display an image is also included in the technical concept of the present invention.

[0043] Figure 1 A plan view of the organic light-emitting display device according to the first embodiment is shown in schematic form.

[0044] like Figure 1As shown, 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 remaining area other than the display area AA may be defined as a non-display area NAA.

[0045] For example, a pixel P may include multiple red sub-pixels SPr, multiple green sub-pixels SPg, and multiple blue sub-pixels SPb, etc. The multiple sub-pixels SPr, SPg, and SPb may have different colors along a first direction X and the same color along a second direction Y, but are not limited to this. That is, the multiple sub-pixels SPr, SPg, and SPb may have a long striped pattern with the same color along the second direction Y.

[0046] The organic light-emitting layers and cathode electrodes of the multiple organic light-emitting elements 120r, 120g, and 120b can each have a striped pattern of the same color arranged elongated along the second direction Y. For example, multiple red sub-pixels SPr emitting red light can be arranged in a strip along the second direction Y. For example, multiple green sub-pixels SPg emitting green light can be arranged in a strip along the second direction Y. For example, multiple green sub-pixels SPg emitting blue light can be arranged in a strip along the second direction Y.

[0047] The red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb can be alternately arranged along the first direction X in column line units, thereby realizing an organic light-emitting display device with a side-by-side structure. For example, the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb can be arranged alternately along the first direction X, but it is not limited to this.

[0048] For example, a red organic light-emitting element 120r can be disposed at a red sub-pixel SPr, a green organic light-emitting element 120g can be disposed at a green sub-pixel SPg, and a blue organic light-emitting element 120b can be disposed at a green sub-pixel SPg.

[0049] Multiple sub-pixels SPr, SPg, and SPb can each include a light-emitting area EA and a non-light-emitting area NEA. The light-emitting area EA is the area where organic light-emitting elements 120r, 120g, and 120b are set, and the non-light-emitting area NEA can be defined as the remaining area other than the light-emitting area EA.

[0050] The red organic light-emitting element 120r, green organic light-emitting element 120g, and blue organic light-emitting element 120b may each include an anode electrode, an organic light-emitting layer, and a cathode electrode. 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, and a charge generation layer. Each of the red organic light-emitting element 120r, green organic light-emitting element 120g, and blue organic light-emitting element 120b may include at least two stacked structures. Each stacked structure may include a light-emitting organic light-emitting layer.

[0051] The organic light-emitting layer and cathode electrode can be disposed at each of the plurality of sub-pixels 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. In contrast, 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 strip pattern of the same color and disposed for a long period along the second direction Y. That is, the organic light-emitting layer and cathode electrode may be disposed across the plurality of sub-pixels SPr, SPg, SPb along the second direction Y respectively. That is, the organic light-emitting layer and cathode electrode may not only be disposed at the plurality of sub-pixels SPr, SPg, SPb along the second direction Y, but may also be disposed in a region that extends continuously to the area between the plurality of sub-pixels SPr, SPg, SPb.

[0052] On the one hand, although not shown, it may have multiple power lines to supply power to multiple sub-pixels SPr, SPg, SPb, thereby providing a first potential voltage.

[0053] The multiple power lines may include: multiple first power lines and multiple second power lines disposed in the display area AA; and a third power line disposed in the non-display area NAA.

[0054] Multiple first power lines and multiple second power lines can be arranged in a matrix structure at the display area AA. The multiple first power lines can be located in the area between multiple sub-pixels SPr, SPg, and SPb in the second direction Y, and the multiple second power lines can be located in the area between multiple sub-pixels SPr, SPg, and SPb in the first direction X. A third power line can be electrically connected to the power terminals and the second power lines at a non-display area NAA.

[0055] Multiple sub-pixels SPr, SPg, and SPb may each include a driving circuit with a driving transistor, etc.

[0056] Although not shown, an additional power line may be provided to supply a second potential voltage greater than the first potential voltage. This additional power line may be electrically connected to the driving transistors of each sub-pixel SPr, SPg, SPb, but is not limited thereto.

[0057] When specific sub-pixels SPr, SPg, and SPb are selected by the scanning transistor in response to the scanning signal, light with a brightness corresponding to the current flowing through the driving transistor is emitted from the sub-pixels SPr, SPg, and SPb using the first potential voltage of multiple power lines and the second potential voltage of another power line.

[0058] On the other hand, multiple protrusions 124, 127 may be disposed between multiple sub-pixels SPr, SPg, SPb. As described later, the protrusions 124, 127 may be components that protrude upward from the upper surface of the organic light-emitting elements 120r, 120g, 120b of each of the multiple sub-pixels SPr, SPg, SPb.

[0059] The plurality of protrusions may include a plurality of first protrusions 124 and a plurality of second protrusions 127. The plurality of first protrusions 124 may be disposed between a plurality of sub-pixels SPr, SPg, SPb in the first direction X, and the plurality of second protrusions 127 may be disposed between a plurality of sub-pixels SPr, SPg, SPb in the second direction Y.

[0060] Multiple first protrusions 124 may extend between multiple virtual sub-pixels SPrd, SPgd, and SPbd on the non-display area NAA, and may form a third protrusion. The non-display area NAA is an area susceptible to penetration by moisture, oxygen, etc. In an embodiment, by providing multiple fourth waterproof structures at the third protrusions, penetration by moisture, oxygen, etc., can be prevented. The multiple fourth waterproof structures may be provided between multiple virtual sub-pixels SPrd, SPgd, and SPbd in the first direction X, or between multiple virtual sub-pixels SPrd, SPgd, and SPbd in the first direction X and multiple virtual sub-pixels SPrd, SPgd, and SPbd in the second direction Y. The fourth waterproof structures may be combined with... Figure 3 The third waterproof structures 128-1 and 128-2 shown have the same structure.

[0061] Multiple waterproof structures 125, 126-1, 126-2, multiple blocking structures, etc., can be disposed on the first protrusion 124 between multiple sub-pixels SPr, SPg, SPb in the first direction X. Multiple connecting structures 130-1, 130-2 can be disposed on the second protrusion 127 between multiple sub-pixels SPr, SPg, SPb in the second direction Y.

[0062] Since the first protrusion 124 is formed as a structure that can both block water and electricity, multiple blocking structures can be omitted. For example, when the leakage current (i.e., lateral leakage current) between multiple sub-pixels SPr, SPg, and SPb in the first direction X has a very small impact on image quality, multiple blocking structures may not be provided between the multiple sub-pixels SPr, SPg, and SPb in the first direction X. The connection structures 130-1 and 130-2 can electrically connect the second power line provided between the multiple sub-pixels SPr, SPg, and SPb in the second direction Y to the multiple cathode electrodes of the multiple organic light-emitting elements 120r, 120g, and 120b of the multiple sub-pixels SPr, SPg, and SPb.

[0063] The blocking structure can be a layer of low-resistance organic light-emitting material, such as a hole injection layer or a charge generation layer, that separates each organic light-emitting element 120r, 120g, and 120b to prevent electrical short circuits between the anode and cathode electrodes and reduce leakage current between sub-pixels.

[0064] As described below, lateral or longitudinal leakage current between multiple sub-pixels SPr, SPg, and SPb can be prevented by a blocking structure. The lateral leakage current can be the leakage current flowing along a first direction X between adjacent sub-pixels SPr, SPg, and SPb, and the longitudinal leakage current can be the leakage current flowing along a second direction Y between adjacent sub-pixels SPr, SPg, and SPb. Furthermore, electrical short circuits between the anode and cathode electrodes at corresponding sub-pixels SPr, SPg, and SPb can be prevented by the blocking structure. Therefore, by using the blocking structure, color spots caused by leakage current can be improved, and luminous efficiency and brightness can be significantly improved. In addition, electrical short circuits between the anode and cathode electrodes can be prevented, and operational or luminous failures can be prevented, improving product reliability.

[0065] Multiple waterproof structures 125, 126-1, and 126-2 may be disposed in the display area AA and / or the non-display area NAA. For example, the multiple waterproof structures 125, 126-1, and 126-2 may be disposed between multiple sub-pixels SPr, SPg, and SPb in the first direction X and / or the second direction Y of the display area AA and / or the non-display area NAA. The multiple waterproof structures 125, 126-1, and 126-2 may be disposed in the non-light-emitting area NEA of each of the multiple sub-pixels SPr, SPg, and SPb in the first direction X and / or the second direction Y.

[0066] Multiple waterproof structures may include multiple first waterproof structures 125, multiple second waterproof structures 126-1, 126-2, and multiple third waterproof structures. As described later, multiple first waterproof structures 125 and multiple second waterproof structures 126-1, 126-2 may be provided on multiple first protrusions 124, and multiple third waterproof structures may be provided on multiple second protrusions 127. The third waterproof structures may block moisture, oxygen, etc., from penetrating into the connection structures 130-1, 130-2 and reducing the connection characteristics, or block the channels for moisture, oxygen, etc., to penetrate into adjacent sub-pixels, thereby improving the reliability of the product in high humidity environments.

[0067] On the one hand, organic light-emitting layers are easily damaged by moisture, oxygen, etc., and when organic light-emitting layers are damaged by moisture, oxygen, etc., the corresponding sub-pixels SPr, SPg, SPb may fail to function, resulting in light emission failure. When many sub-pixels SPr, SPg, SPb fail to function due to moisture, oxygen, etc., display failures such as point light emission failure and area light emission failure may occur, thereby reducing product reliability.

[0068] However, the multiple waterproof structures 125, 126-1, and 126-2 in the embodiments can prevent moisture, oxygen, etc., from penetrating into the non-display area NAA or the display area AA, thereby preventing operational or light-emitting failures of the sub-pixels SPr, SPg, and SPb. Thus, the organic light-emitting layers of the sub-pixels SPr, SPg, and SPb are not affected by moisture, oxygen, etc., thereby significantly improving reliability.

[0069] On the other hand, column layer ( Figure 2 (162) can be disposed on a substrate between multiple sub-pixels SPr, SPg, SPb in the first direction X, instead of a dam, and the dam can be disposed on a substrate between multiple sub-pixels SPr, SPg, SPb in the second direction Y. A pillar layer can be disposed on the substrate between multiple sub-pixels SPr, SPg, SPb in the second direction Y instead of a dam. Figure 2 (162 in the middle).

[0070] In this case, the width W1 between the light-emitting regions EA of multiple sub-pixels SPr, SPg, SPb in the first direction X can be reduced to a value greater than that of the top layer ( Figure 2 The width of the pillar layer of the first protrusion 124 (163) is smaller, which increases the area of ​​the light-emitting region EA of each sub-pixel SPr, SPg, SPb.

[0071] In the accompanying drawings, the dashed lines indicate the light-emitting areas EA (or their areas) of each sub-pixel SPr, SPg, SPb, while the solid lines indicate the strip-shaped sub-pixels SPr, SPg, SPb of the multiple waterproof structures 125, 126-1, and 126-2.

[0072] The width W1 between the light-emitting areas EA can be determined by a portion of the multiple first protrusions 124 disposed between multiple sub-pixels SPr, SPg, and SPb in the first direction X, for example, by the width of the pillar layer. In other words, since the width W1 between the light-emitting areas EA is reduced by the width of the pillar layer, the area of ​​the light-emitting area EA of each sub-pixel SPr, SPg, and SPb increases, thereby extending the lifespan at high brightness and achieving a high-brightness display.

[0073] Figure 2 A cross-sectional view of an organic light-emitting display device according to a first embodiment is shown. Figure 2 It can be along Figure 1 The cross-sectional view taken by the A-A' line in the diagram.

[0074] Although not shown, the region between multiple green sub-pixels SPg and multiple red sub-pixels SPr in the first direction X, or the region between multiple green sub-pixels SPg and multiple green sub-pixels SPr in the first direction X, may also have the same characteristics as... Figure 2 The regions between the multiple red sub-pixels SPr and the multiple green sub-pixels SPg in the first direction X shown have the same or similar structures.

[0075] like Figure 1 and Figure 2 As shown, the first protrusion 124 may be disposed on the substrate 110 between the red sub-pixel SPr and the green sub-pixel SPg in the first direction X. The first protrusion 124 may be disposed longer along the second direction Y between the red sub-pixel SPr and the green sub-pixel SPg in the first direction X, but is not limited thereto.

[0076] The left and right sides of the first protrusion 124 may have shapes that are symmetrical to each other with respect to the central normal of the first protrusion 124. As will be described later, this is because the top layer 163 and the pillar layer 162 are formed by a single photolithography process.

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

[0078] The first protrusion 124 may include a column layer 162 and a top layer 163 located on the column layer 162.

[0079] Multiple first undercut structures 124a, 124b can be formed through column layer 162 and top layer 163.

[0080] To form multiple first undercut structures 124a, 124b, the pillar layer 162 and the top layer 163 can be formed of materials with different etching selectivity or etching rates. For example, the pillar layer 162 may include a material with a fast etching rate, and the top layer 163 may include a material with a slow etching rate. Thus, when the photosensitive pattern is formed on the top layer 163, and the pillar layer 162 and the top layer 163 are etched, the side portion of the pillar layer 162 can be etched faster than the side portion of the top layer 163, thereby forming multiple first undercut structures 124a, 124b on the side portion of the first protrusion 124. That is, the side portion of the pillar layer 162 can be recessed from the side portion of the top layer 163 toward the inside of the first protrusion 124, thereby forming multiple first undercut structures 124a, 124b.

[0081] The plurality of first undercut structures 124a, 124b may have a recessed shape. For example, the plurality of first undercut structures 124a, 124b may have a U-shaped recessed shape. Therefore, the first undercut structures 124a, 124b may be referred to as a recess, a U-shaped recess, a recessed portion, etc.

[0082] The column layer 162 can be made of an inorganic insulating material. The inorganic insulating material can be a silicon oxide series material or a silicon nitride series material.

[0083] The top layer 163 can be made of metals, inorganic insulating materials, etc. Metals can include titanium (Ti), molybdenum (Mo), molybdenum-titanium (MoTi), aluminum (Al), copper (Cu), and their alloys. Inorganic insulating materials can be silicon oxide series materials or silicon nitride series materials.

[0084] On the other hand, the red organic light-emitting element 120r can be disposed on the substrate 110 in the red sub-pixel SPr, and the green organic light-emitting element 120g can be disposed on the substrate 110 in the green sub-pixel SPg.

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

[0086] The red anode electrode 121r and the green anode electrode 121g can be formed before the first protrusion 124 is formed. That is, a conductive film can be formed on the substrate 110 and patterned 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 spaced apart from each other with a minimum distance D1 so that electrical short circuits do not occur. Thereafter, the first protrusion 124 can be formed on the substrate 110 between the red sub-pixel SPr and the green sub-pixel SPg.

[0087] As previously described, the first protrusion 124 may include a pillar layer 162 and a top layer 163. To form a plurality of first undercut structures 124a, 124b, the width W1 of the pillar layer 162 may be smaller than the width of the top layer 163. In this case, the side of the pillar layer 162 may be recessed from the side of the top layer 163 toward the interior of the first protrusion 124 and located within the plurality of first undercut structures 124a, 124b.

[0088] Using a deposition process, a green organic light-emitting layer 122g and a green cathode electrode 123g can be deposited on a substrate 110. After a first inorganic insulating layer 135-1 is formed on the green cathode electrode 123g, 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 sub-pixel SPg.

[0089] Using a deposition process, a red organic light-emitting layer 122r and a red cathode electrode 123r can be deposited on a substrate 110. After a second inorganic insulating layer 135-2 is formed on the red cathode electrode 123r, 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 sub-pixel SPr.

[0090] According to the embodiment, the green organic light-emitting layer 122g and the red organic light-emitting layer 122r can respectively contact the side portion 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 respectively contact the side portion of the pillar layer 162. Therefore, 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 area EA is determined by the corresponding contact area, the light-emitting area EA of the green sub-pixel SPg and the light-emitting area EA of the red sub-pixel SPr can be increased. Therefore, the corresponding light-emitting area EA can be increased, the lifespan and brightness can be increased, thereby improving image quality.

[0091] On one hand, the first inorganic insulating layer 135-1 and the first organic insulating layer 141-1 can be disposed on the green organic light-emitting element 120g in the green sub-pixel SPg. For example, the first inorganic insulating layer 135-1 and the first organic insulating layer 141-1 can be disposed only on the green sub-pixel SPg, and not on the red sub-pixel SPr or the blue sub-pixel SPb.

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

[0093] The first inorganic insulating layer 135-1 may include two or more inorganic films 135-1a and 135-1b, each made of a different material from the others. The second inorganic insulating layer 135-2 may include two or more inorganic films 135-2a and 135-2b, each made of a different material from the others. For example, the first inorganic films 135-1a and 135-2a may include SiO2, etc., and the second inorganic films 135-1b and 135-2b may include SiNx, etc., but are not limited thereto.

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

[0095] On the other hand, multiple waterproof structures 125, 126-1, and 126-2 may be located between multiple sub-pixels SPr, SPg, and SPb in the first direction X. Multiple waterproof structures 125, 126-1, and 126-2 may be disposed on a first protrusion 124 located between multiple sub-pixels SPr, SPg, and SPb in the first direction X.

[0096] Multiple waterproof structures may include a first waterproof structure 125, multiple second waterproof structures 126-1, 126-2, etc.

[0097] Because multiple waterproof structures, namely the first waterproof structure 125 and multiple second waterproof structures 126-1, 126-2, are provided in the first protrusion 124, the penetration of moisture, oxygen, etc. can be completely blocked.

[0098] The first waterproof structure 125 may be configured such that two or more of the multiple inorganic insulating layers 135-1 and 135-2 overlap on the top layer 163 of the first protrusion 124.

[0099] like Figure 2 As shown, the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2 can be overlapped on the top layer 163 of the first protrusion 124 disposed between the red sub-pixel SPr and the green sub-pixel SPg, thereby forming the first waterproof structure 125. For example, the second inorganic insulating layer 135-2 can be disposed on the first inorganic insulating layer 135-1.

[0100] As described above, the overlapping first waterproof structures 125 prevent membrane peeling, thereby reducing the generation of progressive dark spots caused by peeled foreign matter and improving reliability. Furthermore, the penetration paths of moisture, oxygen, etc., are lengthened, thus enhancing the reliability of products operating in high humidity conditions.

[0101] The first organic insulating layer 141-1 may be disposed between the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2 on the top 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.

[0102] As previously described, the green sub-pixel SPg, red sub-pixel SPr, and blue sub-pixel SPb can be manufactured in the following 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 can be patterned to manufacture the green sub-pixel SPg. Subsequently, the red organic light-emitting element 120r, the second inorganic insulating layer 135-2, and the second organic insulating layer 141-2 can be patterned to manufacture the red sub-pixel SPr. Then, as... Figure 3 As shown, the blue organic light-emitting element 120b, the third inorganic insulating layer 135-3, and the third organic insulating layer 141-3 can be patterned to create the blue sub-pixel SPb.

[0103] Through this series of manufacturing processes, at least two of the first inorganic insulating layers 135-1, the second inorganic insulating layer 135-2, and the third inorganic insulating layer 135-3 can be overlapped on the first protrusion 124 between multiple sub-pixels SPr, SPg, and SPb in the first direction X, thereby forming the first waterproof structure 125.

[0104] For example, the first inorganic insulating layer 135-1 and the third inorganic insulating layer 135-3 may be overlapped on the first protrusion between the green sub-pixel SPg and the blue sub-pixel SPb to form a first waterproof structure. For example, the second inorganic insulating layer 135-2 and the third inorganic insulating layer 135-3 may be overlapped on the first protrusion between the blue sub-pixel SPb and the red sub-pixel SPr to form a first waterproof structure.

[0105] For example, the first inorganic insulating layer 135-1 and the second inorganic insulating layer 135-2 may be overlapped on the first protrusion 124 between the red sub-pixel SPr and the green sub-pixel SPg to form the first waterproof structure 125.

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

[0107] Therefore, due to Figure 2 The first waterproof structure 125 shown includes an island-shaped insulating pattern and is formed by the overlap of three inorganic insulating layers, which can further enhance the blocking performance against moisture, oxygen, etc.

[0108] On the other hand, a plurality of second waterproof structures 126-1, 126-2 may also be provided on the side of the first protrusion 124. A plurality of second waterproof structures 126-1, 126-2 may be provided at a plurality of first undercut structures 124a, 124b of the first protrusion 124.

[0109] When membranes comprising various materials are stacked, moisture, oxygen, etc., can penetrate through the interface between the organic insulating layers 141-1, 141-2 and the inorganic insulating layers 135-1, 135-2, or through the materials of the organic insulating layers 141-1, 141-2 themselves. Since the first waterproof structure 125 is located at the corresponding interface, oxygen, moisture, etc., can penetrate. The first waterproof structure 125 is formed as an overlapping structure of the inorganic insulating layers 135-1, 135-2, which extends the penetration path.

[0110] Even if moisture, oxygen, etc., penetrate through the first waterproof structure 125, the second waterproof structures 126-1 and 126-2 may have areas without interfaces where the organic insulating layers 141-1 and 141-2 contact the inorganic insulating layers 135-1 and 135-2. Therefore, moisture, oxygen, etc., can be completely blocked by the second waterproof structures 126-1 and 126-2. For example, this interface-free area may be the lower side of the top layer 163 and / or the side of the column layer 162.

[0111] This interface can serve as a partition in a waterproof structure. During the deposition process, by using an angle-limiting plate for the evaporation source, the partition can be secured when deposition is performed at a larger angle than a certain deposition angle relative to the horizontal plane of the substrate 110. For example, when the etching depth on the underside of the top layer 163 is 0.5 μm and the height of the pillar layer 162 is 0.5 μm, and deposition is performed at a deposition angle of 45° or greater, this interface can serve as a secured partition.

[0112] One of the multiple inorganic insulating layers 135-1 and 135-2 can be formed into an inorganic film / inorganic film bonding structure through multiple first undercut structures 124a and 124b, and thus form multiple second waterproof structures 126-1 and 126-2. That is, the inorganic insulating layer can be disposed on the side of the pillar layer 162 and the underside of the top layer 163 in the multiple first undercut structures 124a and 124b, forming second waterproof structures 126-1 and 126-2 with inorganic film / inorganic film bonding structures.

[0113] On one hand, the blocking structures 136-1 and 136-2 can be disposed in the edge region of the first protrusion 124. The blocking structures 136-1 and 136-2 can be disposed in the edge region of the column layer 162 of the first protrusion 124.

[0114] The blocking structures 136-1 and 136-2 may include at least one blocking layer 113 to form an undercut structure recessed from the side of the pillar layer 162 toward the inward side. The blocking layer 113 may be recessed from the side of the pillar layer 162 toward the inward side to form the blocking structures 136-1 and 136-2 with the undercut structure. The blocking layer 113 may include silicon-based inorganic materials, metals, etc. As a metal, aluminum (Al), molybdenum (Mo), molybdenum alloys, etc., may be used, but are not limited thereto.

[0115] The first protrusion 124 can not only have waterproof properties but also leakage resistance blocking properties. However, blocking structures 136-1 and 136-2 can be provided to double-enhance leakage blocking. Blocking structures 136-1 and 136-2 can be connected with... Figure 3 The blocking structures 137-1 and 137-2 shown are formed using the same process. When the image quality is less affected by the lateral leakage current, the blocking structures 137-1 and 137-2 can be omitted. In this case, the blocking structures 136-1 and 136-2 can also be omitted, but are not limited to this.

[0116] Lateral leakage current between the red sub-pixel SPr and the green sub-pixel SPg can be prevented by blocking structures 136-1 and 136-2. The lateral leakage current can be the leakage current flowing between adjacent sub-pixels SPr and SPg along the first direction X. Furthermore, electrical short circuits between the anode electrodes 121r and 121g and the cathode electrodes 123r and 123g of the red sub-pixel SPr and the green sub-pixel SPg can be prevented by blocking structures 136-1 and 136-2. Therefore, by using blocking structures 136-1 and 136-2, color spots caused by leakage current can be improved.

[0117] Figure 3 A cross-sectional view of an organic light-emitting display device according to a second embodiment is shown. Figure 3 It can be along Figure 1 The cross-sectional view taken by the B-B' line in the diagram. Figure 4 A cross-sectional view of an organic light-emitting display device according to a third embodiment is shown. Figure 4 It can be along Figure 1 The cross-sectional view taken from the C-C' line.

[0118] Figure 3 The cross-sectional structure of the region between multiple blue sub-pixels SPb in the second direction is shown. The cross-sectional structures of the regions between multiple red sub-pixels SPr in the second direction Y and the regions between multiple green sub-pixels SPg in the second direction Y can be compared with the cross-sectional structure of the region between multiple blue sub-pixels SPb in the second direction Y. Figure 3 (Same or similar)

[0119] like Figure 1 and Figure 3 As shown, multiple second protrusions 127 can be disposed on the substrate 110 between multiple blue sub-pixels SPb in the second direction Y, or at least between the non-display area NAA and the display area AA. The second protrusions 127 can be provided in the form of multiple virtual sub-pixels SPrd, SPgd, and SPbd in the non-display area NAA, which is susceptible to water damage, thereby enhancing water resistance when patterned by color. The shape of the pattern can be set along the first direction X, or along both the first direction X and the second direction Y.

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

[0121] The second protrusion 127 may include a column layer 162 and a top layer 163. The second protrusion 127, including the column layer 162 and the top layer 163, may have the same characteristics as... Figure 2 It has the same shape as the first protrusion 124 shown.

[0122] The connecting structures 130-1 and 130-2, which are structurally connected to the second protrusion 127, can be disposed between multiple sub-pixels SPr, SPg, and SPb of the same color in a strip-like shape. Although they vary depending on the product, when the screen size is 8'' or larger on a diagonal basis, the connecting structures 130-1 and 130-2 are used to connect the auxiliary electrode and the first power line between manufacturing processes, thereby improving the uniformity of screen brightness.

[0123] like Figure 4 As shown, subpixels SPb of the same color can be distinguished by pillar layer 162. In this case, pillar layer 162 can act as a dam.

[0124] The connection structures 130-1 and 130-2 may also include a bottom layer. The bottom layer may be disposed below the pillar layer 162. The bottom layer may include an auxiliary electrode made of a material with excellent conductivity, such as a metal. Although not shown, the auxiliary electrode may be electrically connected to a first power supply line supplying the first potential voltage.

[0125] On the other hand, such as Figure 4 As shown, a pillar layer 162 with the function of a dam can be disposed below the second protrusion 127 between a plurality of sub-pixels SPb in the second direction Y. A third inorganic insulating layer 135-3 and a third organic insulating layer 141-3 can be disposed on a plurality of green sub-pixels SPg and a plurality of second protrusions 127 in the second direction Y. That is, the inorganic film and the organic film can be formed and patterned on the substrate 110, and the third inorganic insulating layer 135-3 and the third organic insulating layer 141-3 can be disposed on a plurality of green sub-pixels SPg and a plurality of second protrusions 127 in the second direction Y.

[0126] like Figure 3 As shown, multiple third waterproof structures 128-1 and 128-2 may be disposed on the side of the second protrusion 127. Multiple third waterproof structures 128-1 and 128-2 may be disposed at multiple second undercut structures 127a and 127b of the second protrusion 127.

[0127] The third inorganic insulating layer 135-3 can be formed by a plurality of second undercut structures 127a, 127b in an inorganic film / inorganic film bonding structure, thereby forming a plurality of third waterproof structures 128-1, 128-2. That is, the third inorganic insulating layer 135-3 can be disposed on the side of the pillar layer 162 and the underside of the top 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.

[0128] For example, the third-1 waterproof structure 128-1 can be formed by the third inorganic insulating layer 135-3 through the second-1 undercut structure 127a as an inorganic film / inorganic film bonding structure. For example, the third-2 waterproof structure 128-2 can be formed by the third inorganic insulating layer 135-3 through the second-2 undercut structure 127b as an inorganic film / inorganic film bonding structure.

[0129] Because the multiple third waterproofing structures 128-1 and 128-2 have inorganic membrane / inorganic membrane bonding structures, the penetration path of moisture, oxygen, etc. can be extended, thereby further enhancing the penetration blocking performance.

[0130] Meanwhile, blocking structures 137-1 and 137-2 can be disposed at the edge region of the second protrusion 127. Blocking structures 137-1 and 137-2 can be disposed at the edge region of the column layer 162 of the second protrusion 127.

[0131] The blocking structures 137-1 and 137-2 may include at least one blocking layer 113 to form an undercut structure that is recessed from the side of the pillar layer 162 toward the inward side. The blocking structures 137-1 and 137-2 with undercut structures are formed by the blocking layer 113 being recessed from the side of the pillar layer 162 toward the inward side.

[0132] Electrical short circuits between the blue anode electrode 121b and the blue cathode electrode 123b in the blue sub-pixel SPb can be prevented by blocking structures 137-1 and 137-2. Therefore, by utilizing blocking structures 137-1 and 137-2, operational or light-emitting failures caused by electrical short circuits between the blue anode electrode 121b and the blue cathode electrode 123b can be prevented, thereby improving product reliability.

[0133] On the other hand, such as Figure 4 As shown, among the multiple blue sub-pixels SPb in the second direction Y, the second protrusion 127, the connecting structures 130-1, 130-2, the third waterproof structures 128-1, 128-2, etc., may not be provided between some of the blue sub-pixels SPb.

[0134] like Figure 1 and Figure 4 As shown, multiple blue sub-pixels SPb in the second direction Y can be set over the entire area of ​​the striped pattern of the same color. The second protrusion 127, connecting structures 130-1, 130-2, and third waterproof structures 128-1, 128-2 can be set along the second direction Y of the striped pattern in three blue sub-pixel units or in three line units.

[0135] like Figure 4 As shown, since the second protrusion 127, connecting structures 130-1, 130-2, and third waterproof structures 128-1, 128-2 are not provided, the blue organic light-emitting layer 122b or the blue cathode electrode 123b provided on the pillar layer 162 can continue to extend towards the adjacent blue sub-pixel SPb.

[0136] On the one hand, the blocking structures 138-1 and 138-2 can be installed at the edge region of the column layer 162. The blocking structures 138-1 and 138-2 can be connected with... Figure 2 The column layer 162 of the first protrusion 124 shown may be formed in Figure 3The blocking structures 136-1, 136-2, 137-1, and 137-2 at the edge region of the pillar layer 162 of the second protrusion 127 shown are formed using the same process, but are not limited thereto.

[0137] Figure 5 A plan view of the organic light-emitting display device according to the second embodiment is shown for schematic purposes.

[0138] Except for the increase in the width W2 between the light-emitting regions EA of the multiple sub-pixels SPr, SPg, and SPb in the first direction X, the second embodiment differs from the first embodiment ( Figure 1 )same.

[0139] As described later, multiple first dikes can be disposed between multiple sub-pixels SPr, SPg, and SPb in the first direction X. Since the width of the first dike is greater than the width of the pillar layer of the first protrusion, the light-emitting area EA of the corresponding sub-pixels SPr, SPg, and SPb can be reduced due to the increase in the width of the first dike. Therefore, in the second embodiment ( Figure 5 In the first embodiment, the width W2 between the light-emitting regions EA of the multiple sub-pixels SPr, SPg, and SPb in the first direction X can be greater than that in the first embodiment. Figure 1 W1 is the width between the light-emitting regions EA of the multiple sub-pixels SPr, SPg, and SPb in the first direction X.

[0140] Figure 6 A cross-sectional view of an organic light-emitting display device according to a fourth embodiment is shown. Figure 7 A cross-sectional view of an organic light-emitting display device according to a fifth embodiment is shown. Figure 6 and Figure 7 respectively along Figure 5 The cross-sectional view taken from lines A-A' and B-B'.

[0141] like Figure 1 , Figure 6 and Figure 7 As shown, a plurality of first dikes 111-1 can be disposed on substrate 110 between a plurality of sub-pixels SPr, SPg, SPb in the first direction X, and a plurality of second dikes 111-2 can be disposed on substrate 110 between a plurality of sub-pixels SPr, SPg, SPb in the second direction Y.

[0142] Multiple first protrusions 124 may be disposed on multiple first ridges 111-1 between multiple sub-pixels SPr, SPg, SPb in the first direction X, and multiple second protrusions 127 may be disposed on multiple second protrusions 127 between multiple sub-pixels SPr, SPg, SPb in the second direction Y.

[0143] The multiple second dikes 111-2, the multiple first protrusions 124 and the multiple second protrusions 127 have been described, so their detailed description is omitted.

[0144] like Figure 6 As shown, the width W2 of the first embankment 111-1 can be greater than the width W1 of the column layer 162 of the first protrusion 124.

[0145] The red organic light-emitting element 120r can be disposed at the red sub-pixel SPr, and the green organic light-emitting element 120g can be disposed at the green sub-pixel SPg. The red organic light-emitting element 120r may include a red anode electrode 121r, a red organic light-emitting layer 122r, a red cathode electrode 123r, etc., and the green organic light-emitting element 120g may include a green anode electrode 121g, a green organic light-emitting layer 122g, a green cathode electrode 123g, etc.

[0146] The red anode electrode 121r and the green anode electrode 121g can be spaced apart from each other by a minimum distance D1 to prevent electrical short circuits. The width W1 of the pillar layer 162 of the first protrusion 124 can be greater than the spacing distance D1 between the red anode electrode 121r and the green anode electrode 121g.

[0147] The first dam 111-1 can be disposed on the red anode electrode 121r and the green anode electrode 121g. That is, the first dam 111-1 can vertically overlap 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 dam 111-1.

[0148] In addition, the green organic light-emitting layer 122g and / or the green cathode electrode 123g can contact the upper surface of one side of the first dike 111-1, and the red organic light-emitting layer 122r and / or the red cathode electrode 123r can contact the upper surface of the other side of the first dike 111-1.

[0149] Even if the deposition material is deposited on the substrate 110 with 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 entrances of the first undercut structures 124a and 124b. As a result, the deposition system is very simple, and the unit price of the deposition system can be significantly reduced.

[0150] On the one hand, the first waterproof structure 125 can be disposed on the first protrusion 124, and a plurality of second waterproof structures 125, 126-1, 126-2 can be disposed on the side of the first protrusion 124.

[0151] On the other hand, although not shown, but as Figure 1 As shown, the cathode electrodes 123r, 123g, and 123b of each sub-pixel SPr, SPg, and SPb can be electrically connected to the power line through multiple connection structures 130-1 and 130-2 disposed between multiple sub-pixels SPr, SPg, and SPb in the second direction Y.

[0152] The connection method and connection structure can be implemented in a variety of ways, such as laser welding, laser ablation, bottom cutting structure at the bottom of the dike, bottom cutting structure at the top of the dike, etc., but are not limited to these.

[0153] Although not shown, the blocking structure may be present in the edge region of the first dike 111-1 and / or the second dike 111-2.

[0154] The detailed description above should be construed as exemplary and not restrictive in all respects. The scope of the embodiments should be determined by a reasonable interpretation of the appended claims, and the scope of the embodiments includes all variations within the equivalent scope of the embodiments.

Claims

1. An organic light-emitting display device, wherein, include: Multiple sub-pixels, each having a different color along a first direction and the same color along a second direction intersecting the first direction; Multiple anode electrodes are located at the multiple sub-pixels; Multiple organic light-emitting layers are located on the multiple anode electrodes; Multiple cathode electrodes are located on the multiple organic light-emitting layers; Multiple inorganic insulating layers are located on the multiple cathode electrodes; Multiple first protrusions are disposed between the multiple sub-pixels in the first direction and have multiple first undercut structures on the side; Multiple first waterproof structures are located on the multiple first protrusions; as well as Multiple second waterproof structures are located at the multiple first undercut structures of the multiple first protrusions. The first waterproof structure is formed by overlapping at least two inorganic insulating layers on the first protrusion.

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

3. The organic light-emitting display device according to claim 2, wherein, The width between the light-emitting regions of each of the plurality of sub-pixels in the first direction is the width of the pillar layer.

4. The organic light-emitting display device according to claim 1, wherein, The second waterproof structure is formed in which one of the plurality of inorganic insulating layers is formed by the first undercut structure in an inorganic film / inorganic film bonding structure.

5. The organic light-emitting display device according to claim 1, wherein, Also includes: Multiple second protrusions are located between the multiple sub-pixels in the second direction.

6. The organic light-emitting display device according to claim 5, wherein, Also includes: Multiple third waterproof structures are located on the sides of the multiple second protrusions. The second protrusion includes: a column layer; and a top layer located on the column layer. The width of the column layer is smaller than the width of the top layer, so as to form a second undercut structure on the side of the second protrusion.

7. The organic light-emitting display device according to claim 5, wherein, Also includes: Multiple connecting structures are located at the second undercut structure of the second protrusion.

8. The organic light-emitting display device according to claim 5, wherein, Also includes: A blocking structure is located at the edge region of at least one of the first protrusion and the second protrusion.

9. The organic light-emitting display device according to claim 1, wherein, Also includes: The display area includes the plurality of sub-pixels; The non-display area includes multiple virtual sub-pixels; Multiple third protrusions extend from multiple first protrusions along the second direction to the non-display area; as well as Multiple third waterproof structures are located at the multiple third protrusions.

10. The organic light-emitting display device according to claim 1, wherein, Also includes: Multiple first dikes, located below the multiple first protrusions, The organic light-emitting layer is disposed on the upper side of the first embankment.

11. The organic light-emitting display device according to claim 10, wherein, Also includes: Multiple second dikes, located between the multiple sub-pixels in the second direction, The cathode electrode is continuously disposed on the second dam facing the sub-pixel adjacent to the second dam.

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