Organic light emitting display device

Abstract

An organic light-emitting display device includes: a substrate having a plurality of sub-pixels; an anode located on the substrate in one of the sub-pixels; a first dam layer located on the substrate and having a first opening exposing the anode; and a second dam layer located on the first dam layer and having a second opening wider than the first opening, wherein the second dam layer includes a first region and a second region thinner than the first region, and wherein, in a plan view, the second region has a shape protruding in a direction away from the anode.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0176288, filed on December 2, 2024, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] This disclosure relates to an organic light-emitting display device. Background Technology

[0004] With the development of the information society, interest in and demand for display devices for displaying images have grown in various forms, and the display field has developed rapidly. In response, various lightweight and thin flat panel display devices have been developed and are attracting attention. Recently, display devices such as liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays have been in use.

[0005] Organic light-emitting displays (OLEDs) are self-emissive display devices that display images on a display panel by emitting light from an organic light-emitting layer sandwiched between two electrodes. Unlike liquid crystal displays (LCDs), OLEDs do not require a separate light source (such as a backlight unit), allowing them to be manufactured in a lightweight and thin form. Furthermore, OLEDs offer advantages in power consumption due to their low-voltage operation and also excel in color performance, response speed, viewing angle, and contrast.

[0006] An organic light-emitting display device includes pixels and a barrier layer separating the pixels to define the pixels, each pixel including an organic light-emitting element. The barrier layer can be used as a pixel defining film.

[0007] When the pixel design changes from square to circular, the organic film diffuses, resulting in defects where the organic film is not coated. Recently, research has been ongoing to improve the spreadability of organic films. Summary of the Invention

[0008] Therefore, this disclosure relates to an organic light-emitting display device that substantially eliminates one or more problems caused by the limitations and disadvantages of the prior art.

[0009] An exemplary embodiment of this disclosure provides an organic light-emitting display device in which the spreadability of an organic film is improved by controlling the shape of the dam layer.

[0010] Additional advantages and features of this disclosure will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon reading the following, or may be learned from practice of this disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures specifically pointed out in the written description, its claims, and the accompanying drawings.

[0011] To achieve these and other advantages and in accordance with the purposes of this disclosure, as embodied and generally described herein, an organic light-emitting display device includes: a substrate having a plurality of sub-pixels; an anode located on the substrate in one of the plurality of sub-pixels; a first dam layer located on the substrate and having a first opening exposing the anode; and a second dam layer located on the first dam layer and having a second opening wider than the first opening, wherein the second dam layer includes a first region and a second region thinner than the first region, and wherein, in a plan view, the second region has a shape that protrudes in a direction away from the anode.

[0012] In the plan view, the second dam layer may include a third region that is positioned closer to the anode than the second region, and the third region may have a smaller thickness than the second region.

[0013] In a plan view, the anode can have a circular or elliptical shape, the third region can have a ring shape surrounding the anode, and the second region can have a shape that protrudes away from the anode from the third region.

[0014] In a plan view, the third region can be located between the anode and the first region.

[0015] The second and third regions may each include inclined surfaces and be formed by patterning.

[0016] The second region may include a first part and a second part spaced apart from each other, and in a plan view, the first part and the second part of the second region may protrude in different directions relative to the anode.

[0017] In the plan view, the second embankment may include micro-protrusions extending from the second region, and the micro-protrusions may have the same thickness as the second region.

[0018] In the plan view, at least a portion of the first embankment layer may not overlap with the second embankment layer.

[0019] In the plan view, the portion of the first dam layer that does not overlap with the second dam layer can have the shape of a circular or elliptical ring surrounding the anode.

[0020] In the plan view, the anode can be set in the first opening and the second opening.

[0021] The organic light-emitting display device may also include an organic film located on the second embankment, wherein the organic film may be disposed in the first opening and the second opening and may cover the side surface and the top surface of the second embankment.

[0022] Each of the first and second openings can have a circular or elliptical shape.

[0023] The first dike layer can be a black dike layer, and the second dike layer can be a transparent dike layer.

[0024] In a plan view, the second region can have a spearhead shape with its width decreasing in the direction away from the anode.

[0025] The second embankment includes micro-protrusion regions, which, in the plan view, have a shape that protrudes from the second region and narrows in width in the direction away from the second region.

[0026] In another aspect of this disclosure, an organic light-emitting display device includes: a substrate having sub-pixels; an anode located on the substrate in the sub-pixels; and a dam layer located on the substrate and having an opening exposing the anode, the dam layer having a first region and a second region thinner than the first region, wherein, in a plan view, the second region of the dam layer may have a shape protruding in a direction away from the anode.

[0027] In the plan view, the second region of the embankment can have a first part and a second part that protrude away from the anode in different directions from each other.

[0028] In the plan view, the first and second portions of the second region of the embankment can be spaced apart from each other, with the first region of the embankment situated between the first and second portions of the second region. In the plan view, the first region of the embankment can surround the second region of the embankment.

[0029] In the plan view, the second region of the embankment can have a spearhead shape with a width decreasing in the direction away from the anode.

[0030] The organic light-emitting display device may further include: an organic film located on the dam layer and the anode; and another dam layer located between the substrate and the dam layer, the other dam layer having an opening exposing the anode and having a width smaller than the opening of the dam layer, wherein the organic film may cover a first region and a second region of the dam layer and fill the opening of the dam layer and the opening of the other dam layer, and wherein, in a plan view, each of the opening of the dam layer and the opening of the other dam layer may have a circular or elliptical shape.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed disclosure. Attached Figure Description

[0032] This disclosure includes accompanying drawings to provide a further understanding of the disclosure. The drawings are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the various principles of the disclosure.

[0033] Figure 1 This is a diagram illustrating an organic light-emitting display device according to an exemplary embodiment of the present disclosure.

[0034] Figure 2 This is a perspective view showing a portion of the display area of ​​a display panel according to an exemplary embodiment of the present disclosure.

[0035] Figure 3 This is an enlarged plan view of a portion of the display area of ​​a display panel according to an exemplary embodiment of the present disclosure.

[0036] Figure 4 It is along Figure 3 The sectional view taken from line II′ in the diagram.

[0037] Figure 5 This is a cross-sectional view of a portion of the display area of ​​a display panel according to another exemplary embodiment of the present disclosure.

[0038] Figure 6 It is along Figure 3 The sectional view taken from line II-II′ in the diagram.

[0039] Figure 7 This is an enlarged plan view of a portion of the display area of ​​a display panel according to another exemplary embodiment of the present disclosure.

[0040] Figure 8 It is along Figure 7 The sectional view taken by line III-III′ in the figure. Detailed Implementation

[0041] The advantages and features of this disclosure, as well as methods for achieving these advantages and features, will be illustrated by the following exemplary embodiments described with reference to the accompanying drawings. However, this disclosure may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, the scope of protection of this disclosure may be defined by the claims and their equivalents.

[0042] The shapes, dimensions, ratios, angles, and quantities disclosed in the accompanying drawings, which are used to describe exemplary embodiments of this disclosure, are merely examples. Therefore, this disclosure is not limited to the details shown. Unless otherwise stated, the same reference numerals refer to the same elements throughout the specification. In the following description, detailed descriptions of relevant known functions or configurations may be omitted where such descriptions might unnecessarily obscure the features of this disclosure.

[0043] Where terms such as “comprising,” “having,” and “including” are used to describe this disclosure, another part or element may be added unless a more restrictive term such as “only” is used. Singular terms may include plural forms, and vice versa, unless indicated otherwise.

[0044] When interpreting a component, even if not explicitly stated, the component should be interpreted as including a tolerance range.

[0045] When describing positional relationships, for example, when the positional relationship between two parts is described as “on top of,” “above,” “below,” and “beside,” one or more parts may be positioned between the two parts, unless more restrictive terms such as “exactly” or “directly” are used.

[0046] Spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one or more elements and another, as illustrated in the accompanying drawings. It should be understood that these terms are intended to cover different orientations of the devices beyond those depicted in the drawings. For example, if the devices shown in the figures are inverted, a device described as being arranged “below” or “under” another device may be arranged “above” another device. Thus, the example term “below” or “under” can include both “below” or “under” and “above” orientations. Similarly, the example term “above” or “upper” can include both “above” and “below” or “under” orientations.

[0047] When describing temporal relationships, such as when the time sequence is described as “after,” “following,” “next,” and “before,” discontinuous situations may be included unless more restrictive terms such as “exactly” or “directly” are used.

[0048] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0049] It should be understood that the term "at least one" includes all combinations associated with any one of them. For example, "at least one of the first element, the second element, and the third element" can include more than two elements selected from the first element, the second element, and the third element, as well as all combinations of each of the first element, the second element, and the third element.

[0050] As will be fully understood by those skilled in the art, the features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may operate differently from each other and be technically driven. Embodiments of this disclosure may be performed independently of each other, or may be performed together in an interdependent relationship.

[0051] Apart from the reference numerals for components in the various figures describing embodiments of this disclosure, the same components may have the same symbols as components that may be shown in other figures.

[0052] Reference will now be made in detail to various embodiments of this disclosure, examples of which are shown in the accompanying drawings.

[0053] Figure 1 This is a diagram illustrating an organic light-emitting display device according to an exemplary embodiment of the present disclosure. Figure 2 This is a perspective view showing a portion of the display area AA of the display panel 10 according to an exemplary embodiment of the present disclosure. Figure 3 This is an enlarged plan view of a portion of the display area AA of the display panel 10 according to an exemplary embodiment of the present disclosure. Figure 4 It is along Figure 3 The sectional view taken from line II′ in the diagram. Figure 5 This is a cross-sectional view of a portion of the display area AA of the display panel 10 according to another exemplary embodiment of the present disclosure. Figure 6 It is along Figure 3 The sectional view taken from line II-II′ in the diagram.

[0054] like Figure 1 As shown, an organic light-emitting display device according to an example embodiment of the present disclosure may include a display panel 10, which includes a substrate 100 and an opposing substrate 600 bonded to each other.

[0055] The substrate 100 may be a transparent glass substrate or a transparent plastic substrate. The substrate 100 may include a display area (AA) and a non-display area (IA).

[0056] The display area AA is the area where an image is displayed, and it can be a pixel array area, an active area, a pixel array unit, a display unit, or a screen. The display area AA can include multiple pixels.

[0057] Each of the multiple pixels may include multiple subpixels (SPs). For example, multiple subpixels SPs can constitute multiple pixels. For example, multiple subpixels SPs may include a first subpixel SP1 and a second subpixel SP2 (see example). Figure 7 In other words, the substrate 100 may include multiple sub-pixels SP.

[0058] The non-display area IA is an area where no image is displayed, and can be a peripheral circuit area, a signal supply area, a non-working area, or a border area. The non-display area IA can be configured to surround the display area AA. The display panel 10 or the substrate 100 may also include a peripheral circuit unit 120 disposed in the non-display area IA. The peripheral circuit unit 120 may include gate driving circuits connected to a plurality of sub-pixels SP.

[0059] The opposing substrate 600 can be configured to overlap with the display area AA. The opposing substrate 600 can be bonded to the substrate 100 using an adhesive (or a transparent adhesive) to face the substrate 100, or it can be laminated onto the substrate 100 with an organic or inorganic material. The opposing substrate 600 can be an upper substrate, a second substrate, or an encapsulation substrate, and can correspond to encapsulating the substrate 100.

[0060] like Figure 2 As shown, the organic light-emitting display device or display panel 10 according to an example embodiment of the present disclosure may include a plurality of sub-pixels SP. Figure 2 A display panel 10 is shown, comprising a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3 among a plurality of sub-pixels SP.

[0061] For example, each of the plurality of pixels may include a first red sub-pixel SP1, a second green sub-pixel SP2, and a third blue sub-pixel SP3. However, this disclosure is not limited thereto. Each of the first sub-pixel SP1 to the third sub-pixel SP3 may be configured to have different sizes (or areas). Figure 3 A display panel 10 is shown, comprising the first sub-pixel SP1 of a plurality of sub-pixels SP. Figure 7 A display panel 10 is shown, comprising a first subpixel SP1 and a second subpixel SP2 among a plurality of subpixels SP.

[0062] like Figure 2 As shown, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may respectively include the first anode 111a, the second anode 111b, and the third anode 111c.

[0063] Figure 2 This is a schematic diagram showing the shape of the second embankment layer 115. Specifically, Figure 2The second dam layer 115 is shown to have a stepped shape and its width narrows in the direction away from the corresponding anode among the first anode 111a, the second anode 111b, and the third anode 111c. A more detailed description of the second dam layer 115 is described below.

[0064] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the organic light-emitting display device may include an anode 111, a first diaphragm layer 110, a second diaphragm layer 115, and an organic film 117.

[0065] The components of an organic light-emitting display device are described in detail below.

[0066] Because substrate 100 and Figure 1 The content described in the previous text is repeated, so its detailed description is omitted here.

[0067] The circuit element layer 101 may be disposed on the substrate 100. The circuit element layer 101 may include a buffer layer, at least one thin-film transistor, an insulating layer, a capacitor, and various wirings.

[0068] The buffer layer has insulating properties and protects the active layer of the thin-film transistor. The buffer layer may contain silicon oxide (SiO2). x ), silicon nitride (SiN) x At least one of the following: and a metal oxide having insulating properties.

[0069] Thin-film transistors can be disposed on a buffer layer. A thin-film transistor includes an active layer, a gate, a source, and a drain.

[0070] Thin-film transistors may include one or more of switching thin-film transistors, driving thin-film transistors, and sensing thin-film transistors.

[0071] The switching thin-film transistor is configured to switch according to a gate signal supplied to the gate wiring and to supply a data voltage supplied from the data wiring to the driving thin-film transistor.

[0072] The driving thin-film transistor is configured to switch according to the data voltage supplied from the switching thin-film transistor to generate a data current according to the power supplied from the power supply wiring, and to supply the data current to the anode 111 of the organic light-emitting element 114.

[0073] The sensing thin-film transistor is configured to sense a threshold voltage deviation of the driving thin-film transistor (which may cause image quality degradation) and to supply current from the driving thin-film transistor to the reference wiring in response to a sensing control signal supplied from the gate wiring or a separate sensing wiring.

[0074] An insulating layer can be disposed on a thin-film transistor. The insulating layer serves to insulate the thin-film transistor. The insulating layer can be formed from an inorganic film, such as a silicon oxide film (SiO2). x ), silicon nitride film (SiN) x (or its multiple layers)

[0075] The capacitor is used to hold the data voltage supplied to the driving thin-film transistor for one frame, and is connected to the gate and source of the driving thin-film transistor, respectively.

[0076] Various wiring can be laid on the insulating layer. Various wires can also be connected to thin-film transistors by penetrating the insulating layer.

[0077] The organic light-emitting element 114 may include an anode 111, an organic light-emitting layer 112, and a cathode 113. The anode 111 may be a first electrode or a pixel electrode, and the cathode 113 may be a second electrode or a common electrode.

[0078] The anode 111 may be disposed on the circuit element layer 101. The anode 111 may be a transparent electrode, a translucent electrode, or a reflective electrode. The anode 111 may include a single-layer or multi-layer structure. According to an exemplary embodiment of this disclosure, the anode 111 may be formed by patterning.

[0079] The organic light-emitting layer 112 may be disposed on the anode 111. The organic light-emitting layer 112 may include a light-emitting layer containing a light-emitting material. The organic light-emitting layer 112 may also include a hole injection layer (HIL) and a hole transport layer (HTL) (not shown) disposed between the anode 111 and the light-emitting layer, and may also include an electron transport layer (ETL) and an electron injection layer (EIL) (not shown) disposed on the light-emitting layer.

[0080] According to an exemplary embodiment of this disclosure, the organic light-emitting layer 112 may cover the side surface of the first dam layer 110 and the side and top surfaces of the second dam layer 115. Specifically, the organic light-emitting layer 112 may contact a portion of the side and top surfaces of the first dam layer 110 and the side and top surfaces of the second dam layer 115 (see, for example...). Figure 4 ).

[0081] The cathode 113 can be disposed on the organic light-emitting layer 112. The cathode 113 can be formed of a transparent metallic material (TCO) (e.g., light-transmitting ITO or IZO) or a translucent metallic material (e.g., magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag)).

[0082] According to an exemplary embodiment of this disclosure, the cathode 113 may cover the side surface of the first dam layer 110 and the side and top surfaces of the second dam layer 115. Specifically, the cathode 113 may cover the side surface of the first dam layer 110 and the side and top surfaces of the second dam layer 115, with the organic light-emitting layer 112 interposed therebetween (see example...). Figure 4 ).

[0083] A first dam layer 110 may be disposed on the circuit element layer 101. A first opening OP1 may be defined by the first dam layer 110. The first opening OP1 may correspond to the anode 111 and may expose a portion of the anode 111. Specifically, the first dam layer 110 may be disposed on the anode 111. More specifically, the first dam layer 110 may cover the end of the anode 111.

[0084] The first dike layer 110 can be a black dike layer or a transparent dike layer. For example, the black dike layer can be formed from at least one of organic insulating materials, such as black resin, graphite powder, graphite ink, black spray, and black enamel. The transparent dike layer can be formed by coating a photosensitive organic insulating material and then patterning it. Preferably, the first dike layer 110 can be a black dike layer.

[0085] A second dam layer 115 may be disposed on the first dam layer 110. The second opening OP2 may be defined by the second dam layer 115. According to an exemplary embodiment of this disclosure, the second opening OP2 may have a wider width than the first opening OP1. For example, the second opening OP2 may have a wider area than the first opening OP1.

[0086] The second dam layer 115 can be a transparent dam layer. For example, the second dam layer 115 can be formed by coating a photosensitive organic insulating material and then patterning it.

[0087] According to an exemplary embodiment of this disclosure, the organic light-emitting display device may have a two-layer structure of a first dam layer 110 and a second dam layer 115. Here, the first dam layer 110 may preferably be located on the lower layer to minimize contact with the organic light-emitting layer 112, and the second dam layer 115 may preferably be located on the first dam layer 110. In other words, the second dam layer 115, as a transparent dam layer, may cover the first dam layer 110, as a black dam layer, thereby minimizing the contact between the first dam layer 110 and the organic light-emitting layer 112.

[0088] Typically, the outgassing of a black dam layer is higher than that of a transparent dam layer, and the outgassing barrier effect is also lower in a black dam layer than in a transparent dam layer. According to an exemplary embodiment of this disclosure, by forming a second dam layer 115, which is a transparent dam layer, on a first dam layer 110 that is a black dam layer, the outgassing that may occur during the formation of the black dam layer can be reduced, and the generation of impurities that may occur during the heat treatment of the black dam layer can also be reduced.

[0089] Furthermore, by forming a first dam 110, which is a black dam layer, below the second dam layer 115, which is a transparent dam layer, a high-brightness organic light-emitting display device can be realized while preventing or reducing light leakage.

[0090] According to an example embodiment of this disclosure, the second embankment 115 may include a first region 115a, a second region 115b, and a third region 115c.

[0091] like Figure 3 and Figure 4 As shown, the second embankment layer 115 may include a first region 115a, a second region 115b thinner than the first region 115a, and a third region 115c thinner than both the first and second regions 115a and 115b. For example, compared to the first region 115a, the second region 115b and the third region 115c refer to regions formed by patterning. Specifically, compared to the first region 115a, the second region 115b and the third region 115c refer to regions formed by only partially patterning.

[0092] According to an example embodiment of this disclosure, the first region 115a, the second region 115b, and the third region 115c of the second embankment 115 may be disposed on the first embankment 110.

[0093] According to an exemplary embodiment of this disclosure, in a plane, the second region 115b may have a shape that protrudes in a direction away from the anode 111. For example, Figure 3 The shape of the second region 115b protruding in a direction away from the anode 111 is shown. For example, the first portion 115b1 and the second portion 115b2 of the second region 115b may each protrude in different directions. Specifically, the first portion 115b1 of the second region may protrude in a plane facing the left side of the anode 111, and the second portion 115b2 of the second region may protrude in a plane facing the right side of the anode 111. This disclosure is not limited thereto, and the second region 115b may also include a third portion 115b3 and a fourth portion 115b4. Here, the first portion 115b1, the second portion 115b2, the third portion 115b3, and the fourth portion 115b4 of the second region may each protrude in different directions.

[0094] For example, in a plane, the width of the second region 115b can be narrowed in a direction away from the anode 111.

[0095] According to an exemplary embodiment of this disclosure, the second region 115b and the third region 115c may each include an inclined region. Specifically, the inclined surface of each of the second region 115b and the third region 115c may face the anode 111.

[0096] According to an exemplary embodiment of this disclosure, in a plane, the third region 115c may be positioned closer to the anode 111 than the second region 115b. For example, the anode 111 may have a circular or elliptical shape in the plane, and the third region 115c may have an annular shape surrounding the anode 111 in the plane. In this case, the second region 115b may have a triangular spearhead shape protruding from the third region 115c.

[0097] According to an exemplary embodiment of this disclosure, the first region 115a may represent a region in the second dam layer 115 other than the second region 115b and the third region 115c. For example, the first region 115a may represent an area that has not been etched or patterned. Furthermore, the first region 115a may be the region in the second dam layer 115 that has the greatest thickness.

[0098] like Figure 3 and Figure 4 As shown, the first region 115a can surround the second region 115b and the third region 115c.

[0099] According to an exemplary embodiment of this disclosure, in a plane, a third region 115c may be disposed between the anode 111 and the first region 115a. Specifically, as... Figure 3 As shown, in the plane, at least a portion of the first embankment 110 can be disposed between the anode 111 and the third region 115c.

[0100] According to an example embodiment of this disclosure, the encapsulation layer 119 may be disposed on the second diaphragm layer 115. The encapsulation layer 119 may have a structure in which a first inorganic film 116, an organic film 117, and a second inorganic film 118 intersect and are laminated.

[0101] The encapsulation layer 119 is used to prevent or inhibit the penetration of oxygen or moisture into the cathode 113. For this purpose, the encapsulation layer 119 may include a first inorganic film 116 and a second inorganic film 118. The first inorganic film 116 and the second inorganic film 118 may each be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, or titanium oxide.

[0102] The organic film 117 can be formed to a sufficient thickness to prevent particles from penetrating the encapsulation layer 119 and entering the organic light-emitting layer 112 and the cathode 113.

[0103] According to an exemplary embodiment of this disclosure, the organic film 117 can be formed transparently to transmit light emitted from the organic light-emitting layer 112. The organic film 117 can be formed of an organic material (e.g., acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin) capable of transmitting more than 99% of the light emitted from the organic light-emitting layer 112. The organic film 117 can be formed by an inkjet process. However, this disclosure is not limited thereto.

[0104] Recently, as pixel designs have shifted from polygonal to circular or elliptical shapes, a problem has emerged where the organic material in the organic film formed via inkjet printing diffuses along the periphery of the pixel. For example, when a pixel has a circular shape, the organic material in the organic film is positioned adjacent to the edge of the circular pixel, and its diffusion characteristics are weakened, resulting in a defect where the organic film is not coated to the center of the circular pixel. Consequently, moisture and oxygen from the external environment can penetrate into the light-emitting element, potentially degrading the display's electrical performance and shortening its lifespan.

[0105] According to an exemplary embodiment of this disclosure, since the second dam layer 115 includes a second region 115b protruding in the plane in a direction away from the anode 111, capillary action around the anode 111 can be improved, and the spreadability of the organic film 117 can be enhanced. Therefore, potential defects of the organic film 117 not being coated can be prevented or suppressed, and the organic film 117 can fill the center of the anode 111 in the plane.

[0106] According to an exemplary embodiment of this disclosure, the second embankment 115 may include a micro-protrusion region 115d projecting from the second region 115b in a plane. Here, the micro-protrusion region 115d may have the same thickness as the second region 115b.

[0107] According to an example embodiment of this disclosure, the microprotrusion region 115d may include multiple sub-microprotrusion regions (115d1, 115d2, 115d3, etc.). For example, as... Figure 3 As shown, the first sub-micro-protrusion region 115d1 protrudes from the fourth portion 115b4 of the second region, and the second sub-micro-protrusion region 115d2 and the third sub-micro-protrusion region 115d3 protrude from the third portion 115b3 of the second region. However, this disclosure is not limited thereto, and in the plane, more than three sub-micro-protrusion regions may protrude from the second region 115b.

[0108] For example, in a plane, the micro-protrusion region 115d can have a triangular spearhead shape that protrudes from the second region 115b and whose width narrows in the direction away from the second region 115b.

[0109] According to an exemplary embodiment of this disclosure, by providing the microprotrusion region 115d, capillary action can be maximized or increased around the anode 111. Therefore, potential defects where the organic film 117 is not coated can be further suppressed, and the organic film 117 can be filled in a plane toward the anode 111.

[0110] According to an exemplary embodiment of this disclosure, at least a portion of the first embankment 110 may not overlap with the second embankment 115. For example, as... Figure 3 As shown in the plan view, the area of ​​the first embankment 110 that does not overlap with the second embankment 115 can have the shape of a circular ring or an elliptical ring.

[0111] According to an exemplary embodiment of this disclosure, the organic membrane 117 may be disposed within the first opening OP1 and the second opening OP2. Specifically, the organic membrane 117 may cover the side and top surfaces of the second embankment 115. Figure 4 An example is shown where an organic membrane 117 is filled in the first opening OP1 and the second opening OP2.

[0112] According to an exemplary embodiment of this disclosure, in a plane, the anode 111 may be disposed in the first opening OP1 and the second opening OP2. According to an exemplary embodiment of this disclosure, a portion of the anode 111 may be disposed outside the first opening OP1. Specifically, a portion of the anode 111 may be covered by the end of the first embankment 110.

[0113] According to an example embodiment of this disclosure, the first opening OP1 and the second opening OP2 may each have a circular or elliptical shape (see example...). Figure 3 and Figure 4 ).

[0114] According to an exemplary embodiment of this disclosure, an upper buffer layer 121 may be disposed on an encapsulation layer 119. The upper buffer layer 121 may be formed of an organic insulating material having a low dielectric constant. For example, the upper buffer layer 121 may comprise an acrylic resin, an epoxy resin, or a silicone resin. The upper buffer layer 121 may be formed of an inorganic insulating material and may be disposed over the entire upper surface of the encapsulation layer 119.

[0115] According to an example embodiment of this disclosure, the black matrix 122 and the color filter layer 123 may be disposed on the upper buffer layer 121.

[0116] The black matrix 122 can be disposed between the color filter layers 123 to prevent light from one pixel from traveling to the color filter layers of adjacent pixels and causing color mixing. Furthermore, the black matrix 122 can be configured to overlap with the first dam layer 110 corresponding to the non-light-emitting portion.

[0117] Each color filter layer 123 can be configured to correspond to multiple sub-pixels SP. For example, as Figure 7 and Figure 8 As shown, the first color filter layer 123a can be configured to correspond to the first sub-pixel SP1, and the second color filter layer 123b can be configured to correspond to the second sub-pixel SP2.

[0118] like Figure 5 As shown, with Figure 4 In contrast, the second dike layer 115 can be etched simultaneously with the first dike layer 110. According to... Figure 4 The second dike layer 115 can be etched using a different process than that used for the first dike layer 110. For example, as... Figure 4 As shown, the second embankment 115 can expose the flat top surface of the first embankment 110. (As illustrated...) Figure 5 As shown, the second embankment 115 may not expose the flat top surface of the first embankment 110.

[0119] Figure 7 This is an enlarged plan view of a portion of the display area AA of a display panel according to another exemplary embodiment of the present disclosure. Figure 8 It is along Figure 7 The sectional view taken by line III-III′ in the figure.

[0120] like Figure 7 and Figure 8 As shown, multiple sub-pixels SP may include a first sub-pixel SP1 and a second sub-pixel SP2. The descriptions of the first sub-pixel SP1 and the second sub-pixel SP2 are consistent with... Figure 3 The description of the first sub-pixel SP1 shown overlaps.

[0121] For example, such as Figure 7 and Figure 8 As shown, a first organic light-emitting element 114a is disposed in a first sub-pixel SP1, and a second organic light-emitting element 114b is disposed in a second sub-pixel SP2. The first organic light-emitting element 114a includes a first anode 111a, and the second organic light-emitting element 114b includes a second anode 111b.

[0122] The second region of the second dam layer 115b may include a fifth portion 115b5 and a sixth portion 115b6 disposed in the second sub-pixel SP2. The second region of the second dam layer 115b may also include a seventh portion and an eighth portion disposed in the second sub-pixel SP2. The fifth portion 115b5 of the second region and the sixth portion 115b6 of the second region may correspond to the first portion 115b1 and the second portion 115b2 of the second region disposed in the first sub-pixel SP1, respectively.

[0123] The third region of the second embankment 115c may include a first portion 115c1 disposed in the first sub-pixel SP1 and a second portion 115c2 disposed in the second sub-pixel SP2.

[0124] According to exemplary embodiments of this disclosure, Figure 7 and Figure 8 The first part 115c1 of the third region shown can correspond to Figures 1 to 6 The third region 115c is shown. Because the description of the second part 115c2 of the third region is redundant with the description of the first part 115c1 of the third region, its description is omitted.

[0125] like Figure 7 and Figure 8 As shown, the first color filter layer 123a and the second color filter layer 123b can be respectively disposed in the first sub-pixel SP1 and the second sub-pixel SP2.

[0126] It will be apparent to those skilled in the art that this disclosure is not limited to the above embodiments and drawings, and that various substitutions, modifications, and variations can be made in this disclosure without departing from the spirit or scope thereof. Therefore, the scope of protection of this disclosure is defined by the appended claims and their equivalents, and all variations or modifications intended to be derived from the meaning, scope, and equivalent concepts of the claims fall within the scope of this disclosure.

Claims

1. An organic light-emitting display device, comprising: The substrate has multiple sub-pixels; The anode is located on the substrate in one of the plurality of sub-pixels; A first dam layer is located on the substrate and has a first opening that exposes the anode; as well as The second dike layer is located on the first dike layer and has a second opening that is wider than the first opening. The second embankment layer includes: First region; and The second region is thinner than the first region, and In the plan view, the second region has a shape that protrudes in a direction away from the anode.

2. The organic light-emitting display device according to claim 1, wherein, In the plan view, the second embankment includes a third region positioned closer to the anode than the second region, and the third region has a smaller thickness than the second region.

3. The organic light-emitting display device according to claim 2, wherein, In the plan view, the anode has a circular or elliptical shape. In the plan view, the third region has an annular shape surrounding the anode, and In the plan view, the second region has a shape that protrudes from the third region away from the anode.

4. The organic light-emitting display device according to claim 2, wherein, In the plan view, the third region is located between the anode and the first region.

5. The organic light-emitting display device according to claim 2, wherein, The second region and the third region each include an inclined surface and are formed by patterning.

6. The organic light-emitting display device according to claim 1, wherein, The second region comprises a first portion and a second portion spaced apart from each other, and In the plan view, the first portion and the second portion of the second region protrude in different directions relative to the anode.

7. The organic light-emitting display device according to claim 1, wherein, In the plan view, the second embankment includes micro-protrusion regions projecting from the second region, and The micro-protrusion region has the same thickness as the second region.

8. The organic light-emitting display device according to claim 1, wherein, In the plan view, at least a portion of the first embankment layer does not overlap with the second embankment layer.

9. The organic light-emitting display device according to claim 8, wherein, In the plan view, the portion of the first embankment that does not overlap with the second embankment has a circular or elliptical ring shape surrounding the anode.

10. The organic light-emitting display device according to claim 1, wherein, In the plan view, the anode is disposed in the first opening and the second opening.

11. The organic light-emitting display device according to claim 1, further comprising an organic film located on the second diaphragm layer, in, The organic membrane is disposed within the first opening and the second opening and covers the side and top surfaces of the second embankment.

12. The organic light-emitting display device according to claim 1, wherein, Each of the first opening and the second opening has a circular or elliptical shape.

13. The organic light-emitting display device according to claim 1, wherein, The first dike layer is a black dike layer, and the second dike layer is a transparent dike layer.

14. The organic light-emitting display device according to claim 1, wherein, In the plan view, the second region has a spearhead shape with a width that decreases in the direction away from the anode.

15. The organic light-emitting display device according to claim 14, wherein, The second embankment includes micro-protrusion regions, which, in the plan view, have a shape that protrudes from the second region and narrows in width in a direction away from the second region.

16. An organic light-emitting display device, comprising: The substrate has sub-pixels; The anode is located on the substrate in the sub-pixel; A dam layer, located on the substrate and having an opening exposing the anode, the dam layer having a first region and a second region thinner than the first region. In the plan view, the second region of the embankment has a shape that protrudes in a direction away from the anode.

17. The organic light-emitting display device according to claim 16, wherein, In the plan view, the second region of the embankment has a first portion and a second portion that protrude away from the anode in different directions from each other.

18. The organic light-emitting display device according to claim 17, wherein, In the plan view, the first portion and the second portion of the second region of the embankment are spaced apart from each other, and the first region of the embankment is located between the first portion and the second portion of the second region. In the plan view, the first region of the embankment surrounds the second region of the embankment.

19. The organic light-emitting display device according to claim 16, wherein, In the plan view, the second region of the embankment has a spearhead shape with a width decreasing in the direction away from the anode.

20. The organic light-emitting display device according to claim 16, further comprising: An organic membrane is located on the embankment and the anode; as well as Another dam layer, located between the substrate and the dam layer, has an opening that exposes the anode and is narrower than the opening in the dam layer. The organic film covers the first and second regions of the dike layer and fills the openings of the dike layer and the openings of the other dike layer. In the plan view, each of the openings in the embankment and the openings in the other embankment has a circular or elliptical shape.

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