Organic light emitting diode display

Abstract

An organic light-emitting display device having a thin bezel is provided by having an organic protective film flow control pattern according to one embodiment of the present invention. In the active area and bezel area defined on the substrate, the flowability of the organic protective film disposed in the active area is minimized by spreading to the bezel area due to the organic protective film flow control pattern, thereby minimizing the width of the bezel area. In an organic light-emitting display device having an organic protective film flow control pattern according to one embodiment of the present invention, the upper layer of the organic protective film becomes flat without curvature due to the organic protective film flow control pattern, so the display quality of the organic light-emitting display device can be improved.

Description

Technology Field

[0001] The present invention relates to an organic light-emitting display device, and more specifically, to an organic light-emitting display device in which a barrier substrate is bonded in an encapsulation manner on a substrate on which an organic light-emitting element is disposed, the invention provides an organic light-emitting display device comprising a flow control pattern configured to more efficiently control the flowability of an adhesive layer or an organic protective layer made of an organic material disposed on the organic light-emitting element. Background Technology

[0002] Recent display devices capable of displaying various information while simultaneously interacting with the user viewing that information require various sizes, shapes, and functions.

[0003] These display devices include Liquid Crystal Display Devices (LCDs), Plasma Display Panels (PDPs), Electrophoretic Display Devices (FPDs), and Organic Light Emitting Diode Display Devices (OLEDs).

[0004] Liquid crystal displays are driven by utilizing the optical anisotropy and polarization properties of liquid crystals. Because liquid crystals have a thin and long structure, their molecular arrangement has directionality, and the direction of molecular arrangement can be controlled by artificially applying an electric field to the liquid crystals. Therefore, if the direction of molecular arrangement of the liquid crystals is arbitrarily adjusted, the molecular arrangement of the liquid crystals changes, and due to optical anisotropy, light is refracted in the direction of molecular arrangement of the liquid crystals, allowing light to be transmitted.

[0005] By utilizing these properties, the molecular arrangement direction of the liquid crystal corresponding to multiple pixels is changed to drive the pixels with transmitted light, thereby enabling image information to be displayed on the display device. As such, the liquid crystal display device requires a separate light source, such as a backlight, in addition to the liquid crystal layer.

[0006] However, as a self-emissive display device, an Organic Light Emitting Diode (OLED) does not require a separate light source, unlike a Liquid Crystal Display (LCD), allowing it to be manufactured in a lightweight and thin form factor. Furthermore, OLEDs are being researched as next-generation displays because they offer advantages in terms of power consumption due to low-voltage driving, as well as superior color reproduction, response speed, viewing angle, and contrast ratio (CR).

[0007] Organic light-emitting display devices use organic materials as the organic light-emitting layer. Electrons and holes are injected into the organic light-emitting layer through two electrodes, and excitons are formed when they meet and recombine within the layer. Light is emitted due to the energy from these excitons.

[0008] Electrons and holes are injected through the anode electrode, which is the pixel electrode, and the cathode electrode, which is the common electrode, and a driving element is arranged to control the current injected into the pixel electrode. In addition, to facilitate the smoother injection of electrons and holes, the organic light-emitting layer may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer, and may have a multilayer structure thereof.

[0009] An organic light-emitting display device displays information on a screen by emitting light from a plurality of pixels that include organic light-emitting elements having such an organic light-emitting layer. Depending on the method of driving the pixels, it can be classified into an active matrix type organic light-emitting diode display (AMOLED) or a passive matrix type organic light-emitting diode display (PMOLED).

[0010] Active matrix type organic light-emitting diodes (AMOLEDs) display images by controlling the current flowing through organic light-emitting diodes using thin film transistors (or “TFTs”).

[0011] An active matrix organic light-emitting display device may include various thin-film transistors, such as a switching thin-film transistor, a driving TFT connected to the switching TFT, and an organic light-emitting diode (OLED) connected to the driving TFT.

[0012] The switching TFT is formed at the intersection of the scan line and the data line. The switching TFT performs the function of selecting a pixel. The switching TFT includes a gate electrode branching from the scan line, a semiconductor layer, a source electrode, and a drain electrode. The driving TFT plays the role of driving the organic light-emitting diode (OLED) of the pixel selected by the switching TFT by supplying current to it. The driving TFT includes a gate electrode connected to the drain electrode of the switching TFT, a semiconductor layer, a source electrode connected to the driving current line, and a drain electrode. The drain electrode of the driving TFT is connected to the anode electrode of the organic light-emitting diode (OLED).

[0013] In this way, source electrodes, drain electrodes, and semiconductor layers constituting multiple TFTs for various purposes, along with a large number of electrode wirings connected thereto, are arranged, and a flat layer exists on the electrode layer.

[0014] The flat layer can be composed of one layer or multiple layers, and a multilayer flat layer can be used to efficiently arrange complex electrodes in order to realize a high-resolution and high-performance organic light-emitting display device with a complex pixel structure.

[0015] An anode electrode, which is a pixel electrode, is disposed on a flat layer, and an organic light-emitting layer and a common electrode are disposed thereon. Since particles may be generated during the process of disposing of an organic light-emitting device, composed of a pixel electrode, an organic light-emitting layer, and a common electrode, on the common electrode, an organic protective layer made of organic material may be disposed thereon to prevent damage to the organic light-emitting device caused by this.

[0016] An adhesive layer and a barrier film may be disposed on the organic protective layer, and the organic light-emitting device may further include a multilayer encapsulation film.

[0017] The aforementioned organic protective layer can be placed on an organic light-emitting device using a photocurable material that can be cured by using light such as UV, and various techniques are used to place the organic protective layer in an intended area while ensuring that the top surface of the organic protective layer is flat. The problem to be solved

[0018] An organic protective layer is placed on an organic light-emitting diode to seal the organic light-emitting diode and minimize damage caused by particles. In addition, to control the flowability of the organic protective layer, multiple dams are placed in the non-display area of ​​the organic light-emitting diode to control the flowability of the organic protective layer during the process of placing the layer. However, there may be limitations to controlling flowability by the dam structures in the non-display area, and there were constraints that required considering process errors.

[0019] These constraints posed limitations in realizing an organic light-emitting display with a slim bezel area by minimizing the non-display area of ​​the organic light-emitting display, and when the upper surface of the organic protective layer is curved, the transparency of the organic protective layer may differ between the edge area and the center of the organic light-emitting display, leading to a problem of reduced display quality.

[0020] Accordingly, the inventors of the present invention have invented a new structure for an organic light-emitting display device capable of minimizing the width of the non-display area by more efficiently controlling the flowability of the organic protective film included in the organic light-emitting display device. Furthermore, they have invented a new structure for an organic light-emitting display device capable of improving display quality by controlling the flowability of the organic protective film while simultaneously minimizing the curvature of the upper surface of the organic protective film.

[0021] The problem to be solved according to one embodiment of the present invention is to provide an organic light-emitting display device capable of controlling the flow of an organic protective film by placing a dam structure and an organic protective film flow control pattern at the outermost part of the active area to control the flowability of the organic protective film.

[0022] The problem to be solved according to one embodiment of the present invention is to provide an organic light-emitting display device having a dam structure and an organic protective film flow control pattern to minimize curvature of the upper surface of the organic protective film.

[0023] The problems to be solved according to one embodiment of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0024] An organic light-emitting display device having an organic protective film flow control pattern configured to control the flowability of an organic protective film according to one embodiment of the present invention is provided. The organic protective film is configured to protect an organic light-emitting element, and during the process of placing the organic protective film, the organic protective film is placed on the organic protective film flow control pattern to control the flowability of the organic protective film in an uncured state and minimize the flow of the organic protective film toward the bezel portion. The organic protective film flow control pattern, which controls the flow of the organic protective film, serves as a buffer space for the organic protective film and minimizes the flowability toward the bezel portion, thereby minimizing the spreading of the organic protective film toward the bezel portion.

[0025] An organic light-emitting display device having an organic protective film flow control pattern according to one embodiment of the present invention is provided. An active area and a bezel area are defined on a substrate, and at least one driving element is disposed on the substrate. A flat layer is disposed on the driving element, and an organic light-emitting element is disposed in the active area on the flat layer. At least one dam structure is disposed in the active area on the flat layer, and an organic protective film flow control pattern is disposed on the flat layer to control the flowability of the organic protective film. Effects of the invention

[0026] According to an embodiment of the present invention, by providing an organic protective film flow control pattern, the organic protective film overflowing into the bezel portion is minimized, thereby enabling the stable provision of an organic light-emitting display device having a thin bezel portion.

[0027] In addition, according to another embodiment of the present invention, by providing an organic protective film flow control pattern, the curvature of the upper surface of the organic protective film is minimized, thereby improving the display quality of the organic light-emitting display device.

[0028] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0029] Since the content of the invention described above regarding the problem to be solved, the means for solving the problem, and the effect does not specify the essential features of the claim, the scope of the claim is not limited by the matters described in the content of the invention. Brief explanation of the drawing

[0030] FIG. 1 is a schematic plan view for illustrating an organic light-emitting display device having an organic protective film flow control pattern according to one embodiment of the present invention. FIGS. 2a to 2c are schematic cross-sectional views illustrating various configurations of an organic protective film flow control pattern and a dam structure according to an embodiment of the present invention. Specific details for implementing the invention

[0031] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0032] Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present invention, if it is determined that a detailed description of related prior art may unnecessarily obscure the essence of the present invention, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0033] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0034] In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used.

[0035] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of the present invention.

[0036] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0037] Hereinafter, various configurations of an organic light-emitting display device having a thin bezel by efficiently controlling the flow of an organic protective film according to one embodiment of the present invention will be described.

[0038] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.

[0039] FIG. 1 is a schematic plan view for illustrating an organic light-emitting display device having an organic protective film flow control pattern according to one embodiment of the present invention.

[0040] Referring to FIG. 1, an organic light-emitting display device (100) includes a substrate (110) in which an active area (130) and a bezel area (140) are defined, a barrier film (120) that protects an organic light-emitting element (not shown), a drive IC (150), a wiring electrode (160), an organic protective film flow control pattern (170), and a dam structure (180).

[0041] The substrate (110) has an active area (130) and a bezel area (140) defined and omitted from the illustration, but a plurality of organic light-emitting elements (not shown) are arranged in the active area (130) to form a plurality of pixels.

[0042] Additionally, the substrate (110) includes a plurality of thin-film transistors (not shown) to supply signals and currents for driving a plurality of pixels to the pixels, wherein a switching thin-film transistor, a driving thin-film transistor connected to the switching thin-film transistor, and an organic light-emitting element connected to the driving thin-film transistor are arranged.

[0043] These thin-film transistors (switching thin-film transistors and driving thin-film transistors) are arranged to be connected to gate lines and data lines placed on a substrate (110), and the switching thin-film transistor functions to select a pixel and is placed at the intersection of the gate line and the data line. The switching thin-film transistor includes a gate electrode, a semiconductor layer, a source electrode, and a drain electrode.

[0044] The driving thin-film transistor serves to drive the anode electrode of a pixel selected by the switching thin-film transistor. The driving thin-film transistor includes a drain electrode and a source electrode connected to the drain electrode of the switching thin-film transistor, a gate electrode, a semiconductor layer, and driving current wiring. The drain electrode of the driving thin-film transistor is connected to the anode electrode, which is the pixel electrode of the organic light-emitting diode.

[0045] Organic light-emitting diodes are vulnerable to oxygen and moisture, and since defects such as dark spots can occur due to the penetration of oxygen and moisture, they need to be covered by a multilayer protective film or film.

[0046] A barrier film (120) is bonded to a substrate (110) to cover an organic light-emitting element, and the barrier film (120) and the substrate (110) can be bonded by an adhesive layer.

[0047] An organic protective film (not shown) is disposed on the substrate (110) to protect the organic light-emitting layer (not shown) included in the organic light-emitting element (not shown). It is necessary to control the flowability of the organic protective film (not shown) to minimize spreading from the active area (130) to the bezel area (140). To this end, at least one dam structure (180) and an organic protective film flow control pattern (170) may be disposed on the substrate (110).

[0048] The organic protective film flow control pattern (170) may include a buffer space for controlling the flow of the organic protective film, and the dam structure may be hydrophobic to further control the flowability of the organic protective film. This is possible by controlling the surface energy, and by coating or ion treating with a material such as C or H that can increase the surface energy, the surface energy of the dam structure (180) can be controlled, and as a result, the dam structure can be hydrophobic to further control the flow of the organic protective film.

[0049] FIGS. 2a to 2c are schematic cross-sectional views along A-A' of FIG. 1, and are cross-sectional views for explaining various configurations of an organic protective film flow control pattern and a dam structure according to one embodiment of the present invention.

[0050] Referring to FIG. 2a, when a flat film (213) and an organic protective film (218) are disposed on a substrate (210), an organic protective film flow control pattern (270) that controls the flowability of the organic protective film is disposed on the flat film (213) to control the spreading of the organic protective film (218) into the bezel area (240).

[0051] The substrate (210) may be a flexible substrate of the polyimide series, and in this case, a buffer layer (211) may be disposed on the substrate (210) to minimize the penetration of oxygen and moisture from the bottom of the substrate (210). A gate electrode (262) for turning on and off a thin-film transistor is disposed on the buffer layer (211). The gate electrode (262) may be a multilayer metal wiring comprising aluminum (AL) or molybdenum (Mo).

[0052] An ILD layer (212) and a source / drain electrode (261) are disposed on the gate electrode (262). The ILD layer may be disposed to prevent conduction between the gate electrode (262) and the source / drain electrode (261) and to prevent contamination or damage caused by the lower layer of the gate electrode (62), and may be a two-stage inorganic film layer containing SiNx and SiO2. This is because using a single SiO2 film is advantageous for moisture permeability and process time, but parasitic capacitance may occur and affect the thin-film transistor, while SiNx is advantageous for parasitic capacitance but disadvantageous for moisture permeability and film formation, so the ILD layer (212) may be disposed as a two-stage inorganic film layer.

[0053] A passivation layer (219) is disposed on the source / drain electrode (261). The passivation layer (219) can be disposed to protect the completed thin-film transistor on the source / drain electrode (261), and may be an inorganic film layer to prevent conduction between electrode layers that can be disposed on top and to prevent contamination or burnout of the upper layer by the lower layer. Alternatively, a two-layer structure of organic and inorganic films may be used for the thin-film transistor containing the source / drain electrode (261) because it has a high electrical reactivity due to the abundance of metal material.

[0054] A flat layer (213) is disposed on the passivation layer (219). The flat layer is disposed to mitigate (flatten) the step difference caused by various layer patterns disposed below, and may be disposed including a polymer-based material comprising at least one of acrylic resin, epoxy resin, and polyimide.

[0055] The flat layer (213) may be arranged as a single layer, but may be arranged as two or more layers considering the arrangement of the wiring electrodes.

[0056] When the flat layer (213) is arranged in two layers, a metal electrode can be placed between the two flat layers (213), and the flat layer (213) can be used as a dielectric material to form a capacitance. Furthermore, when using multiple flat layers (213), there is an advantage in that the capacitance can be formed freely.

[0057] When arranged in two layers, a buffer layer (211) and a passivation layer (219) may be further included between a plurality of flat layers (213) as shown in FIG. 2a. The buffer layer (211) and the passivation layer (219) between the plurality of flat layers (213) may be arranged to include a plurality of holes as shown in FIG. 2a so as to discharge outgas that may occur in the flat layers (213).

[0058] Out-gas generated in the flat layer (213) can act on the active layer of the thin-film transistor over the long term and change the driving voltage of the thin-film transistor, and if it penetrates the organic light-emitting layer (215), defects such as dark spots may occur.

[0059] An anode electrode (214), which is a pixel electrode, is disposed on the flat film (213), followed by an organic light-emitting layer (215) and a cathode electrode (216), which is a common electrode.

[0060] The anode electrode (214) can be positioned using an opaque metal material as a reflective electrode that reflects light when the organic light-emitting display device (200) is of the top emission type. Additionally, the cathode electrode (216) of the organic light-emitting display device (200) of the top emission type can be positioned using a transparent conductive material such as ITO or IZO.

[0061] A bank layer (217) capable of distinguishing multiple pixels is disposed on a flat layer (213), and the bank layer (217) disposed between pixels may be a black bank layer (217) to minimize light scattering and prevent color mixing at various viewing angles.

[0062] The flat layer (213) is placed in the active area (230) of the organic light-emitting display device (200) so that electrodes and organic light-emitting elements for various purposes described above can be placed thereon.

[0063] The bezel area (240) can accommodate a driving signal and a wiring electrode that supplies current to drive multiple pixels, and the bezel area (240) can be minimized by arranging multiple source / drain electrodes (261) in multiple layers using the aforementioned Passivation layer (219), buffer layer (211), and ILD layer (212) to minimize the area of ​​the bezel area (240).

[0064] A protective layer consisting of a repeating stacked structure of organic and inorganic materials may be disposed on the cathode electrode (216) to protect the organic light-emitting layer (215) from oxygen and moisture.

[0065] FIG. 2a shows a protective layer composed of a passivation layer (219) and an organic protective film (218), but is not limited thereto.

[0066] A dam structure (280) may be placed in the bezel area (240). The dam structure (280) may be placed in multiple numbers and may be placed to surround the active area (230) or placed within the active area (230).

[0067] The dam structure (280) can be arranged in multiple layers using at least one material, for example, using the material used to arrange the bank layer (217) and the spacer.

[0068] The dam structure (280) can be positioned to surround the active area (230) to control the flowability of the organic protective film (218).

[0069] The organic protective film (218) is applied in a state similar to a high-density liquid, and when the material of the dam structure (280) is hydrophobic, the organic protective film (218) may rise up at the part in contact with the dam structure (280). That is, the surface of the organic protective film (218) is not flat, and the height of the edge part adjacent to the dam structure (280) may be higher than the central part.

[0070] In this case, when the barrier film (220) is bonded using the adhesive layer (612), it may overflow into the bezel area (240), and in this case, oxygen and moisture may penetrate through the side of the organic protective film (218).

[0071] To prevent this, the bezel area (240) must have a width that takes into account a certain margin.

[0072] In this way, an organic protective film flow control pattern (270) is disposed on the flat layer (213) to further control the flowability of the organic protective film (218). Since the flat layer (213) can be disposed in at least one layer, if the organic protective film flow control pattern (270) is disposed by opening a part of the top of the flat layer (213), a buffer space can be secured that takes into account the deviation in the amount of coating of the organic protective film (218), thereby minimizing the design margin for the bezel area (240), and thus, an organic light-emitting display device (200) with a thin bezel and high lifespan reliability can be provided. The flow control pattern (270) may be a hole pattern in the flat layer (213). In addition, the flow control pattern (270) is disposed along the periphery of the active area.

[0073] By placing a dam structure (280) on the outer edge of the organic protective film flow control pattern (270), the organic protective film (218) can be placed so that it does not flow further into the bezel area (240), and the surface energy of the dam structure (280) can be controlled by a method such as ion treatment to make it hydrophilic or hydrophobic, thereby controlling the contact angle formed between the organic protective film flow control pattern (270), the side of the dam structure (280), and the organic protective film (218), so that the organic protective film (218) can finally be placed flat without bending.

[0074] However, the inner surface of the above-described organic protective film flow control pattern (270) can be covered with a pixel electrode. The cathode electrode (216) acts as a common electrode and performs the role of a negative electrode, and is electrically connected using an anode electrode (214) to be connected to the base wiring placed in the bezel area (240). At this time, the interior of the flow control pattern (270) can be covered by the anode electrode (214).

[0075] Next, with reference to FIGS. 2b and 2c, various configurations for controlling the flowability of the organic protective film (218) by the organic protective film flow control pattern (270) and the dam structure (280) will be described, but descriptions of configurations that are duplicated or substantially identical will be omitted.

[0076] Referring to FIG. 2b, the organic protective film flow control pattern (270) is positioned at the outermost part within the active area (230), and the dam structure (280) is positioned adjacent to the inner side of the active area (230) of the organic protective film flow control pattern (270).

[0077] The flowability of the organic protective film (218) can be controlled by the dam structure (280) and the organic protective film flow control pattern (270). This is because, firstly, the flowability of the organic protective film (218) is eliminated by the organic protective film flow control pattern (270) and the adjacent dam structure (280) inside the active area (230), and most of the organic protective film (218) placed beyond the dam structure (280) can be minimized from spreading into the bezel area (240) by the buffer space of the organic protective film flow control pattern (270). Additionally, the spreading of the overflowed organic protective film (218) toward the bezel area (240) can be further minimized by the dam structure (280) placed in the bezel area (240).

[0078] Referring to FIG. 2c, dam structures (280) can be placed on both sides of the organic protective film flow control pattern (270), and the amount of organic protective film (218) that can be contained in the organic protective film flow control pattern (270) can be increased by the dam structures (280). In addition, the curvature of the upper surface of the organic protective film (218) can be minimized by the plurality of dam structures (280).

[0079] Although embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments and may be modified in various ways within the scope of the technical spirit of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of protection of the present invention shall be interpreted by the claims, and all technical spirits within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0080] 100, 200: Organic light-emitting display device 110, 210: Substrate 120, 220: Barrier film 130, 230: Active area 140, 240: Bezel area 150: Driver IC 160: Wiring electrode 170, 270: Organic protective film flow control pattern 180, 280: Dam structure

Claims

Claim 1 A display device comprising: a substrate including an active region and a bezel region; a thin-film transistor disposed on the substrate and including a semiconductor layer, a gate electrode, a source electrode, and a drain electrode; a flat layer on the thin-film transistor and including a first flat layer and a second flat layer disposed on the first flat layer; a light-emitting element on the second flat layer in the active region and including a pixel electrode, a light-emitting layer, and a common electrode; an organic protective film covering the light-emitting element; a plurality of dam structures disposed at the edge of the active region; a metal electrode disposed between the first flat layer and the second flat layer; and a flow control pattern which is a hole pattern in the second flat layer, wherein the interior of the flow control pattern is covered by the pixel electrode, and at least two of the plurality of dam structures are disposed on different layers. Claim 2 A display device according to claim 1, further comprising: a first inorganic film disposed on the gate electrode in the active region; a second inorganic film disposed on the first inorganic film in the active region and covering the source electrode and the drain electrode; and a third inorganic film disposed on the same layer as the second inorganic film in the bezel region, wherein the flat layer is disposed on the second inorganic film, and among the plurality of dam structures, the first dam structure is disposed on the flat layer, and among the plurality of dam structures, the second dam structure is disposed on the third inorganic film. Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 In claim 2, the flow control pattern is an organic light-emitting display device arranged along the periphery of the active region. Claim 7 In claim 6, the first dam structure and the second dam structure are a display device positioned outwardly from the flow control pattern in the direction of the bezel area. Claim 8 A display device according to claim 6, wherein the first dam structure is positioned inwardly from the flow control pattern toward the active area, and the second dam structure is positioned outwardly from the flow control pattern toward the bezel area. Claim 9 A display device according to claim 8, wherein the plurality of dam structures comprises a third dam structure disposed on the flat layer and disposed outwardly from the flow control pattern in the direction of the bezel area, the first and third dam structures disposed in the active area, and the second dam structure disposed in the bezel area. Claim 10 A display device according to claim 1, further comprising banks and spacers disposed on the flat layer in the active region, wherein at least one of the plurality of dam structures is a multilayer structure composed of the same material as the banks and spacers. Claim 11 A display device according to claim 2, wherein the first flat layer is disposed on the second inorganic film, and the first dam structure is disposed on the second flat layer. Claim 12 A display device according to claim 11, further comprising a buffer layer disposed between the first flat layer and the second flat layer in the active region, wherein the buffer layer comprises a plurality of holes. Claim 13 A display device according to claim 1, wherein the flat layer comprises a polymer-based material including at least one of an acrylic resin, an epoxy resin, and a polyimide. Claim 14 A display device according to claim 1, further comprising an adhesive layer and a barrier film on the upper surface of the organic protective film. Claim 15 A display device according to claim 2, wherein the organic protective film extends from the active region to a part of the bezel region, and the end of the organic protective film overlaps with the side of the second dam structure.

Images