Display device

Abstract

A display device according to an embodiment of the present disclosure includes: a base substrate including a display area and a non-display area surrounding the display area; a metal layer formed on the base substrate within a portion of the non-display area and the display area; an electrode disposed on the metal layer; an encapsulation layer disposed on the electrode, sealing a top portion and a side portion of the electrode, and including an organic layer; a first dam portion disposed on the base substrate in the non-display area and surrounding a periphery of the organic layer of the encapsulation layer; and a first control portion disposed on the base substrate and spaced apart from the first dam portion between the first dam portion and the display area, surrounding at least a portion of the display area, and formed to protrude on or be recessed into at least one of the electrode and the metal layer.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10 - 2023 - 0196486, filed on December 29, 2023, which is incorporated herein by reference in its entirety for all purposes as if fully set forth herein. Technical field

[0003] Embodiments of the present disclosure relate to a display device. Background art

[0004] Generally, a display device is installed on an electronic product or a household appliance, such as a television, a monitor, a laptop computer, a smartphone, a tablet computer, an electronic tablet, a wearable device, a watch phone, a portable information device, a navigation device, or a vehicle control display, so as to be used as a screen for displaying an image.

[0005] Since an organic light - emitting element applied to a display device is vulnerable to moisture, oxygen, etc., a encapsulation layer is formed by alternately applying an organic layer and an inorganic layer. For example, a liquid organic material can be applied onto a substrate by an inkjet device and then cured to form the organic layer constituting the encapsulation layer.

[0006] However, due to the fluidity characteristic of the organic material, problems may occur: when forming the organic layer using an inkjet device, it is difficult to control the organic layer to form a desired shape, and due to the presence of irregular steps in the underlying layer, the lengths and shapes of each end of the encapsulation layer may be different.

[0007] In addition, since the organic layer has fluidity before the curing process, problems may occur: the liquid organic material constituting the organic layer may invade the area where a driving circuit is formed on the outer part of the substrate, resulting in a driving failure. Summary of the invention

[0008] Embodiments of the present disclosure aim to provide a display device in which when an organic material is ejected using an inkjet device, the organic material does not immediately flow to the dam portion, so that a desired shape of the encapsulation layer can be formed.

[0009] Embodiments of the present disclosure aim to provide a display device in which the flow of the organic material in a non - display area is always guided so that the ends of the encapsulation layer are formed at desired positions after curing.

[0010] Embodiments of the present disclosure aim to provide a display device that can solve the problem of driving failure caused by the invasion of the organic material into a driving circuit located outside the dam portion.

[0011] According to an embodiment of the present disclosure, a display device may include: a substrate substrate including a display area and a non-display area surrounding the display area; a metal layer formed on the substrate substrate in a part of the non-display area and in the display area; an electrode disposed on the metal layer; a encapsulation layer disposed on the electrode, sealing the top and side portions of the electrode and including an organic layer; a first dam portion disposed on the substrate substrate in the non-display area and surrounding the periphery of the organic layer of the encapsulation layer; and a first control portion disposed on the substrate substrate between the first dam portion and the display area, spaced apart from the first dam portion, surrounding at least a part of the display area, and formed to protrude on at least one of the electrode and the metal layer or recess into at least one of the electrode and the metal layer.

[0012] According to an embodiment of the present disclosure, by forming a control portion for controlling the flow rate of the organic material between the display area and the dam portion, since the organic material does not immediately flow toward the dam portion when using an inkjet device to eject the organic material, a display device in which the encapsulation layer can be formed into a desired shape can be provided.

[0013] According to an embodiment of the present disclosure, by forming a guiding portion for guiding the flow of the organic material in the non-display area, the organic material can always flow in one direction. Therefore, even if there are irregular steps in the underlying layer, by always guiding the flow of the organic material through the guiding portion, a display device in which the end portion of the encapsulation layer is formed at a desired position after curing can be provided.

[0014] According to an embodiment of the present disclosure, by preventing the organic material from overflowing from the dam portion through the control portion, the problem that the organic material invades the driving circuit located outside the dam portion and causes a driving failure can be solved.

[0015] According to an embodiment of the present disclosure, by forming the control portion using the same material as the dam portion, a display device capable of realizing a uni-material product can be provided, in which the materials of the components are simplified and unified. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a system configuration diagram of a display device according to an embodiment of the present disclosure.

[0017] Figure 2 is taken along line A-A' Figure 1 of the display device shown in

[0018] Figure 3 is taken along line B-B' Figure 1 of the display device shown in

[0019] Figure 4is a plan view schematically showing a control structure according to an embodiment of the present disclosure.

[0020] Figure 5 and Figure 6 is a partial cross-sectional view of a display device according to other embodiments of the present disclosure.

[0021] Figure 7 is a plan view schematically showing a guiding part according to an embodiment of the present disclosure.

[0022] Figure 8 is formed with Figure 7 a partial cross-sectional view of a display device having a guiding part.

[0023] Figure 9 and Figure 10 is a plan view schematically showing a guiding part according to other embodiments of the present disclosure. Detailed Description

[0024] In the following description of examples or embodiments of the present disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that can be implemented are illustrated by way of illustration, and the same reference numerals and symbols can be used to represent the same or similar components, even if they are shown in different drawings from each other. Further, in the following description of examples or embodiments of the present disclosure, when it is determined that the description may make the subject matter in some embodiments of the present disclosure less clear, detailed descriptions of well-known functions and components incorporated herein will be omitted. Terms such as "including", "having", "containing", "constituting", "consisting of", and "formed of" used herein are generally intended to allow the addition of other components, unless these terms are used together with the term "only". As used herein, the singular form is intended to include the plural form, unless the context clearly dictates otherwise.

[0025] Terms such as "first", "second", "A", "B", "(A)", or "(B)" may be used herein to describe elements of the present disclosure. Each of these terms is not used to define the essence, order, sequence, quantity, etc. of the element, but only to distinguish the corresponding element from other elements.

[0026] When it is mentioned that a first element "is connected or coupled to", "contacts or overlaps" (etc.) a second element, it should be understood that: the first element can not only "be directly connected or coupled to" or "directly contact or overlap" the second element, but also a third element can be "interposed" between the first element and the second element, or the first element and the second element can "be connected or coupled to" each other, "contact or overlap" (etc.) each other through a fourth element. Here, the second element may be included in at least one of two or more elements that "are connected or coupled to" each other, "contact or overlap" (etc.) each other.

[0027] When relative time terms such as "after", "subsequently", "next", "before", etc. are used to describe the process or operation of an element or configuration, or the flow or steps in an operation, process, or manufacturing method, these terms can be used to describe a non - continuous or non - sequential process or operation, unless used in conjunction with the terms "directly" or "immediately".

[0028] In addition, when referring to any dimension, relative size, etc., it should be considered that even if the relevant description is not specified, the numerical value or corresponding information (e.g., level, range, etc.) of an element or feature also includes the tolerance or error range that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). In addition, the term "may" fully encompasses all the meanings of the term "can".

[0029] Various embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0030] Figure 1 is a system configuration diagram of a display device according to an embodiment of the present disclosure.

[0031] Referring to Figure 1 , the display device 100 may include a display panel 10 and a display driving circuit for driving the display panel 10 as components for displaying an image.

[0032] The display driving circuit may include a data driving circuit 20, a gate driving circuit 30, and a display controller 40.

[0033] The display panel 10 may include a display area AA for displaying an image and a non - display area NA for not displaying an image. The non - display area NA may be an area outside the display area AA and may also be referred to as a border area. All or part of the non - display area NA may be an area visible on the front surface of the display device 100, or an area that is bent and not visible on the front surface of the display device 100.

[0034] The display panel 10 may include a plurality of sub - pixels SP. To drive the plurality of sub - pixels SP, the display panel 10 may further include various types of signal wirings.

[0035] The display device 100 according to an embodiment of the present disclosure may be a liquid crystal display device or the like, or may be a self - emitting display device in which the display panel 10 emits light by itself. When the display device 100 according to an embodiment of the present disclosure is a self - emitting display device, each of the plurality of sub - pixels SP may include a light - emitting element.

[0036] For example, the display device 100 according to an embodiment of the present disclosure may be an organic light-emitting display device in which an organic light-emitting diode (OLED) is used to implement a light-emitting element. Again, for example, the display device 100 according to an embodiment of the present disclosure may be an inorganic light-emitting display device in which an inorganic-based light-emitting diode is used to implement a light-emitting element. Still again, for example, the display device 100 according to an embodiment of the present disclosure may be a quantum dot display device in which quantum dots are used as self-luminous semiconductor crystals to implement a light-emitting element.

[0037] The structure of each of the plurality of sub-pixels SP may vary according to the type of the display device 100. For example, when the display device 100 is a self-luminous display device in which each sub-pixel SP emits light by itself, each sub-pixel SP may include a self-luminous element, at least one transistor, and at least one capacitor.

[0038] For example, various types of signal wirings may include a plurality of data lines DL for transmitting data signals (also referred to as data voltages or image signals) and a plurality of gate lines GL for transmitting gate signals (also referred to as scan signals).

[0039] The plurality of data lines DL and the plurality of gate lines GL may cross each other. Each of the plurality of data lines DL may be arranged to extend in a first direction. Each of the plurality of gate lines GL may be arranged to extend in a second direction.

[0040] The first direction may be a column direction, and the second direction may be a row direction. Alternatively, the first direction may be a row direction, and the second direction may be a column direction.

[0041] A data driving circuit 20 as a circuit for driving the plurality of data lines DL may output data signals to the plurality of data lines DL. A gate driving circuit 30 as a circuit for driving the plurality of gate lines GL may output gate signals to the plurality of gate lines GL. A display controller 40 as a device for controlling the data driving circuit 20 and the gate driving circuit 30 may control the data driving timing of the plurality of data lines DL and the gate driving timing of the plurality of gate lines GL.

[0042] The display controller 40 may provide a data driving control signal to the data driving circuit 20 to control the data driving circuit 20, and may provide a gate driving control signal to the gate driving circuit 30 to control the gate driving circuit 30.

[0043] The data driving circuit 20 may control the provision of data signals to the plurality of data lines DL according to the data driving timing of the display controller 40. The data driving circuit 20 may receive digital-type image data from the display controller 40, may convert the received image data into an analog-type data signal, and may output the data signal to the plurality of data lines DL.

[0044] The gate driving circuit 30 can control the supply of gate signals to a plurality of gate lines GL according to the gate driving timing of the display controller 40. The gate driving circuit 30 can be supplied with a first gate voltage corresponding to a conduction level voltage, a second gate voltage corresponding to a cut-off level voltage, and various gate driving control signals (e.g., a start signal, a reset signal, etc.), and can generate gate signals, and can supply the generated gate signals to the plurality of gate lines GL.

[0045] For example, the data driving circuit 20 can be connected to the display panel 10 by a tape automated bonding (TAB) method, can be connected to the bonding pads of the display panel 10 by a chip on glass (COG) or chip on panel (COP) method, or can be connected to the display panel 10 by being implemented by a chip on film (COF) method.

[0046] The gate driving circuit 30 can be connected to the display panel 10 by a tape automated bonding (TAB) method, can be connected to the bonding pads of the display panel 10 by a chip on glass (COG) or chip on panel (COP) method, or can be connected to the display panel 10 according to a chip on film (COF) method. Alternatively, the gate driving circuit 30 can be formed in a non-display area NA of the display panel 10 in an in-panel gate (GIP) type. The gate driving circuit 30 can be disposed on a substrate, or can be connected to a substrate. That is, in the case of the GIP type, the gate driving circuit 30 can be disposed in the non-display area NA of the substrate. In the case of the chip on glass (COG) type or the chip on film (COF) type, the gate driving circuit 30 can be connected to a substrate.

[0047] At least one of the data driving circuit 20 and the gate driving circuit 30 can be disposed in the display area AA of the display panel 10. For example, at least one of the data driving circuit 20 and the gate driving circuit 30 can be disposed so as not to overlap with the sub-pixels SP, or can be disposed so as to partially or entirely overlap with the sub-pixels SP.

[0048] The data driving circuit 20 can be connected to one side of the display panel 10 (e.g., Figure 1 the upper side or the lower side in Figure 1 ). According to the driving method, the panel design method, etc., the data driving circuit 20 can be connected to both sides of the display panel 10 (e.g.,

[0049] the upper side and the lower side in Figure 1either the left or right side in). Depending on the driving method, panel design method, etc., the gate driving circuit 30 can be connected to both sides of the display panel 10 (e.g., Figure 1 both the left and right sides in), or can be connected to at least two sides of the four sides of the display panel 10.

[0050] The display controller 40 can be implemented as a component separate from the data driving circuit 20, or can be implemented as an integrated circuit by being integrated with the data driving circuit 20.

[0051] The display controller 40 can be a timing controller used in general display technologies, can be a control device including a timing controller and capable of further performing other control functions, can be a control device different from the timing controller, or can be a circuit in the control device. The display controller 40 can be implemented by various circuits or electronic components (e.g., integrated circuit (IC), field programmable gate array (FPGA), application specific integrated circuit (ASIC), and processor).

[0052] The display controller 40 can be mounted on a printed circuit board, a flexible printed circuit, etc., and can be electrically connected to the data driving circuit 20 and the gate driving circuit 30 through a printed circuit board, a flexible printed circuit, etc.

[0053] The display controller 40 can send signals to and receive signals from the data driving circuit 20 through at least one predetermined interface. For example, the interface can include a low voltage differential signal (LVDS) interface, an EPI interface, a serial peripheral interface (SPI), etc.

[0054] In order to provide a touch sensing function in addition to the image display function, the display device 100 according to an embodiment of the present disclosure can include a touch panel and a touch sensing circuit 50, and the touch sensing circuit 50 detects whether a touch event has occurred or detects a touch position by sensing the touch panel with a touch object such as a finger or a pen.

[0055] The touch sensing circuit 50 can include a touch driving circuit 60 and a touch controller 70. The touch driving circuit 60 generates and outputs touch sensing data by driving and sensing the touch panel, and the touch controller 70 can use the touch sensing data to detect the occurrence of a touch event or detect a touch position.

[0056] The touch panel can include a plurality of touch electrodes as touch sensors. The touch panel can also include a plurality of touch wirings for electrically connecting the plurality of touch electrodes and the touch driving circuit 60.

[0057] The touch panel may be located outside the display panel 10 or may be located inside the display panel 10. When the touch panel is located outside the display panel 10, the touch panel is called an external type. When the touch panel is of the external type, the touch panel and the display panel 10 can be manufactured separately and connected during the assembly process. The external type touch panel may include a substrate and a plurality of touch electrodes located on the substrate. When the touch panel is located inside the display panel 10, the touch panel is called an internal type. When the touch panel is of the internal type, the touch panel can be formed inside the display panel 10 during the manufacturing process of the display panel 10.

[0058] The touch driving circuit 60 can supply a touch driving signal to at least one of the plurality of touch electrodes and can generate touch sensing data by sensing at least one of the plurality of touch electrodes.

[0059] The touch sensing circuit 50 can perform touch sensing by a self - capacitance sensing method or a mutual - capacitance sensing method.

[0060] When the touch sensing circuit 50 performs touch sensing by the self - capacitance sensing method, the touch sensing circuit 50 can perform touch sensing based on the capacitance between each touch electrode and a touch object (e.g., a finger, a pen, etc.).

[0061] According to the self - capacitance sensing method, each of the plurality of touch electrodes can serve as both a driving touch electrode and a sensing touch electrode. The touch driving circuit 60 can drive all or a part of the plurality of touch electrodes and can sense all or a part of the plurality of touch electrodes.

[0062] When the touch sensing circuit 50 performs touch sensing by the mutual - capacitance sensing method, the touch sensing circuit 50 can perform touch sensing based on the capacitance between the touch electrodes.

[0063] According to the mutual - capacitance sensing method, the plurality of touch electrodes are divided into driving touch electrodes and sensing touch electrodes. The touch driving circuit 60 can drive the driving touch electrodes and sense the sensing touch electrodes.

[0064] The touch driving circuit 60 and the touch controller 70 included in the touch sensing circuit 50 can be implemented as separate devices or can be implemented as a single device.

[0065] In addition, the touch driving circuit 60 and the data driving circuit 20 can be implemented as separate devices or can be implemented as a single device.

[0066] Figure 2 is taken along line A - A' Figure 1 a partial cross - sectional view of the illustrated display device.

[0067] Refer to Figure 2, the display device 100 (specifically, the display panel 10) may include a base substrate 110, a metal layer 120, electrodes 130, a planarization layer 140, a bank 150, a packaging layer 160, a dam structure 170, and a control structure 180.

[0068] The base substrate 110 is used to support the various components of the display panel 10 of the display device 100. Since the base substrate 110 has an area substantially the same as that of the display panel 10, it can be described that the base substrate 110 may also include a display area AA for displaying an image through a plurality of sub-pixels SP and a non-display area NA surrounding the display area AA.

[0069] For example, the base substrate 110 may be formed of an insulating material such as a glass substrate or a plastic substrate and may be composed of multiple layers. For example, the base substrate 110 may include a first base substrate 111, a second base substrate 112, an interlayer insulating layer 113, a buffer layer 114, and an insulating layer 115.

[0070] The first base substrate 111 and the second base substrate 112 may be made of polyimide. Polyimide (PI) is a polymer with a relatively low degree of crystallinity or mostly an amorphous structure. Polyimide not only provides the advantages of being easy to synthesize into a film and not requiring a cross-linking agent during curing, but also has high transparency, excellent heat resistance and chemical resistance, excellent mechanical and electrical properties, and dimensional stability due to its rigid chain structure.

[0071] However, polyimide has the disadvantage of poor moisture barrier properties. Therefore, an interlayer insulating layer 113 made of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx) may be defined between the first base substrate 111 and the second base substrate 112.

[0072] The buffer layer 114 may be disposed on the second base substrate 112 and may block the inflow of moisture and oxygen into the second base substrate 112.

[0073] The insulating layer 115 may be disposed on the buffer layer 114 and may electrically insulate and protect the metal layer 120 located thereon.

[0074] The metal layer 120 may be formed in a part of the non-display area NA and the display area AA of the base substrate 110. For example, the metal layer 120 may be formed of the same material as the source electrode SE and the drain electrode DE of the driving transistor DTR, as Figure 3 shown.

[0075] Figure 3 is a partial cross-sectional view of the display device taken along line B-B'. Refer to Figure 1 shown. Figure 3, the driving transistor DTR (as a thin film transistor) and the light-emitting element provided in the display area AA of the base substrate 110 will be described below.

[0076] Referring to Figure 3 , the base substrate 110 may include the driving transistor DTR in or on the insulating layer 115, and a part of the driving transistor DTR is formed of the same material as the metal layer 120. The insulating layer 115 may be composed of a single layer, in which case the driving transistor DTR is provided on the insulating layer 115, or the insulating layer 115 may be composed of multiple layers, in which case the insulating layer 115 may include a first insulating layer 115a and a second insulating layer 115b, and the driving transistor DTR is provided within the insulating layer 115.

[0077] The driving transistor DTR may include an active layer ACT, a gate electrode GE, a source electrode SE, and a drain electrode DE. Specifically, the light-emitting element may be connected to the drain electrode DE through a connection electrode CE, and the source electrode SE and the drain electrode DE may be connected to the active layer ACT. When driving the driving transistor DTR, a channel is formed in the active layer ACT.

[0078] The light-emitting element may include a first electrode ANO, a second electrode CAT, and an organic layer EL provided between the first electrode ANO and the second electrode CAT. The first electrode ANO may be an anode, and the second electrode CAT may be a cathode.

[0079] The first electrode ANO may be connected to the drain electrode DE of the driving transistor DTR through a connection electrode CE provided between the first electrode ANO and the drain electrode DE. A bank portion 150 is defined between adjacent first electrodes ANO of adjacent light-emitting elements, and due to this fact, the adjacent first electrodes ANO may be electrically insulated from each other.

[0080] The organic layer EL may be defined on the first electrode ANO. The organic layer EL may include a hole transport layer, an organic light-emitting layer, an electron transport layer, etc.

[0081] The second electrode CAT may be defined on the organic layer EL. When a voltage is applied to the first electrode ANO and the second electrode CAT, holes and electrons may move to the organic light-emitting layer through the hole transport layer and the electron transport layer, respectively, and may combine with each other in the organic light-emitting layer to emit light.

[0082] The electrode 130 may be provided on the metal layer 120 and is formed to be smaller than the metal layer 120 so as to expose a part of the outer portion of the metal layer 120 provided in the non-display area NA. For example, the electrode 130 may be a power wiring to which a low potential voltage VSS is applied.

[0083] The planarization layer 140 is used to reduce the height difference between the structures located below it and can be disposed on the electrode 130. For example, the planarization layer 140 can be formed of an organic material such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin.

[0084] The bank 150 is used to divide sub-pixels and can be disposed on the planarization layer 140. Although not shown, an opening exposing the first electrode ANO located below the bank 150 can be formed in the bank 150 disposed within the display area AA.

[0085] The encapsulation layer 160 is used to protect the electrode 130 located below it from external moisture, oxygen, impact, etc., and can seal the top and sides of the electrode 130. For example, the encapsulation layer 160 can be disposed within the display area AA and the non-display area NA and can include a first encapsulation layer 161, a second encapsulation layer 162, and a third encapsulation layer 163.

[0086] The first encapsulation layer 161 can be formed of an inorganic material and can cover the metal layer 120, the electrode 130, and the planarization layer 140. For example, the first encapsulation layer 161 can be formed of an inorganic insulating material capable of low-temperature deposition (such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), and aluminum oxide (Al2O3)). Thus, when the first encapsulation layer 161 is deposited in a low-temperature atmosphere, the first encapsulation layer 161 can prevent the light-emitting layer including an organic material vulnerable to a high-temperature atmosphere from being damaged during the deposition process.

[0087] The second encapsulation layer 162 can be formed of an organic material and can be formed on the first encapsulation layer 161. For example, the second encapsulation layer 162 can be formed of an organic insulating material (such as acrylic resin, epoxy resin, polyimide, polyethylene, and silicon oxycarbide (SiOC)). Thus, since the second encapsulation layer 162 is formed of an organic material, the elements disposed below it can be sealed while reducing the height difference.

[0088] The second encapsulation layer 162 can be formed using an inkjet method. In this case, since the organic material forming the second encapsulation layer 162 can be ejected in a liquid form and can penetrate the driving circuit disposed on the outer portion of the non-display area NA, a dam structure 170 can be formed in the non-display area NA. The second encapsulation layer 162 can seal up to the inside of the dam structure 170 (specifically, the inside of the first dam portion 171). A detailed description of the dam structure 170 will be given later.

[0089] The third encapsulation layer 163 may be formed of an inorganic material and may cover and seal the second encapsulation layer 162 and the dam structure 170 that is exposed outside the second encapsulation layer 162. For example, the third encapsulation layer 163 may be formed of an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), and aluminum oxide (Al2O3).

[0090] Thus, since the encapsulation layer 160 is composed of multiple layers, the electrodes 130 can be effectively protected by minimizing the penetration of moisture or oxygen from the outside.

[0091] The dam structure 170 is used to limit the end portion of the second encapsulation layer 162 made of an organic material in the encapsulation layer 160, thereby preventing the second encapsulation layer 162 from flowing down or collapsing, and may be formed to be disposed within the non-display area NA and surround the second encapsulation layer 162. That is, when the second encapsulation layer 162 is formed by an inkjet method, the organic material that is the material of the second encapsulation layer 162 is ejected in a liquid form. Therefore, by defining the dam structure 170 in the area where the end portion of the second encapsulation layer 162 is formed, the organic material can be prevented from invading the non-display area NA.

[0092] The dam structure 170 may include: a first dam portion 171 that surrounds the perimeter of the second encapsulation layer 162; and at least one second dam portion 172 that is disposed to be spaced outward from the first dam portion 171 and is formed to have a height greater than the height of the first dam portion 171. For example, the first dam portion 171 may have a closed annular shape that is disposed in the non-display area NA and surrounds the second encapsulation layer 162. The second dam portion 172 may be formed to have a closed annular shape that surrounds the first dam portion 171 in the non-display area NA. For example, the first dam portion 171 and the second dam portion 172 may be formed to surround and enclose the four sides of the display area AA on the non-display area NA. Although the dam structure 170 is shown in this embodiment as including two dam portions, a third dam portion may also be provided outside the second dam portion 172. According to another embodiment, the dam structure 170 may include only one dam portion, such as the first dam portion 171.

[0093] The dam portion of the dam structure 170 may include at least one layer or multiple layers. Specifically, the dam portion of the dam structure 170 may include at least one of the planarization layer 140, the embankment portion 150, and the spacer.

[0094] For example, the first dam portion 171 may be formed of the same material as the embankment portion 150, while the second dam portion 172 may include the same materials as the planarization layer 140 and the embankment portion 150. Alternatively, the first dam portion 171 may be formed of the same material as the planarization layer 140. In this case, since an additional mask process for forming the dam portion 170 can be omitted, the manufacturing cost can be reduced.

[0095] The control structure 180 can be set to be spaced apart from the dam structure 170 toward the display area AA and surround at least a part of the display area AA, and can be formed to protrude on at least one of the electrode 130 and the metal layer 120 or be recessed into one of the electrode 130 and the metal layer 120. For example, the metal layer 120 can be made of the same material as at least one of the source electrode SE and the drain electrode DE of the driving transistor DTR.

[0096] The control structure 180 can include: at least one first control part 181, which is disposed inside the first dam part 171; and a second control part 182, which is disposed between the first dam part 171 and the second dam part 172.

[0097] The first control part 181 and the second control part 182 can be respectively disposed inside and outside the first dam part 171 in the non-display area NA and can be formed into a closed annular shape surrounding the display area AA. In this embodiment, it is described that the first control part 181 is disposed inside the first dam part 171 and the second control part 182 is disposed between the first dam part 171 and the second dam part 172, but additional control parts can also be disposed outside the second dam part 172.

[0098] In this way, since the control structure 180 is disposed in the non-display area NA, when an organic material is ejected using an inkjet device, the organic material does not immediately flow toward the dam structure 170, so that the second encapsulation layer 162 can be formed into a desired shape. In other words, when an organic material is applied using an inkjet device, the control structure 180 controls the flow rate of the organic material.

[0099] For example, the control structure 180 can be formed of the same material as the bank part 150. In this way, when the control structure 180 is formed of the same material as the bank part 150, since the bank part 150 and the control structure 180 can be formed using one mask, the manufacturing cost and time can be reduced.

[0100] The display device 100 according to an embodiment of the present disclosure can provide a touch sensing function in addition to an image display function. For this purpose, a touch buffer layer 210, a touch bridge 220, a touch insulation layer 230, a touch sensor 240, and a cover layer 250 can be sequentially included on the encapsulation layer 160.

[0101] Figure 4 is a plan view schematically showing a control structure according to an embodiment of the present disclosure. Figure 4 is showing Figure 1 of the area “C”.

[0102] Referring to Figures 1 to 4, the control structure 180 can be formed to be parallel to the dam structure 170 on the same side of the display area. That is, when the dam structure 170 is arranged in the horizontal direction in the figure, the control structure 180 can also be arranged to be parallel to the dam structure 170 on the same side of the display area in the horizontal direction.

[0103] The first control part 181 and the second control part 182 can each be set as a plurality of protruding structures 81, which protrude upward on at least one of the electrode 130 and the metal layer 120 so as to surround the display area AA. The plurality of protruding structures 81 can be formed to have a height smaller than the height of the first dam part 171. This is because when the plurality of protruding structures 81 are formed to have a height greater than the height of the first dam part 171, the liquid organic material for forming the second encapsulation layer 162 during the inkjet process cannot flow through the plurality of protruding structures 81, and thus cannot be formed up to the first dam part 171.

[0104] The second control part 182 is an auxiliary means, which is formed to prepare for the case where the organic material flows through the first dam part 171 during the formation of the second encapsulation layer 162 so as to be set up to the second dam part 172. It should be noted that when there is only the first dam part 171, only the first control part 181 can be provided.

[0105] For example, the first control part 181 can be formed as at least one protruding structure 81 or a plurality of protruding structures 81, and the plurality of protruding structures 81 are arranged to be spaced apart from each other between the display area AA and the first dam part 171. In this way, when the first control part 181 is formed as a plurality of protruding structures 81, the second encapsulation layer 162 can be provided in the space between the plurality of protruding structures 81. In other words, during the inkjet process, since the liquid organic material for forming the second encapsulation layer 162 solidifies when flowing over the tops of the plurality of protruding structures 81, the solidified second encapsulation layer 162 can be provided in the space between the plurality of protruding structures 81.

[0106] The second control part 182 can be formed as a plurality of protruding structures 81, and the plurality of protruding structures 81 are arranged to be spaced apart from each other between the display area AA and the first dam part 171. The third encapsulation layer 163 can be provided in the space between the plurality of protruding structures 81 of the second control part 182. In the case where the organic material flows through the first dam part 171 during the formation of the second encapsulation layer 162, the organic material can also be provided in the space between the plurality of protruding structures 81 of the second control part 182.

[0107] In the present embodiment, since each of the first control portion 181 and the second control portion 182 is formed as a plurality of protruding structures 81 disposed in parallel with the first dam portion 171 and the second dam portion 172 on the same side of the display region, during the inkjet process of the organic material for forming the second encapsulation layer 162, the organic material generally does not immediately flow toward the first dam portion 171, and the flow is partially blocked by the plurality of protruding structures 81 of the first control portion 181. Even if the organic material flows past the first dam portion 171, it does not immediately flow toward the second dam portion 172, and the flow is partially blocked by the plurality of protruding structures 81 of the second control portion 182. Therefore, since the flow rate of the organic material is slowed down, the liquid organic material can be more easily controlled compared to the case without the control structure 180, and thus the second encapsulation layer 162 can be set to a desired shape up to a desired position.

[0108] In addition, since the flow of the organic material is controlled, when the organic material is ejected by the inkjet device, it is possible to effectively prevent the organic material from overflowing from the dam structure 170. Therefore, it is possible to solve the problem of drive failure caused by the intrusion of the organic material into the drive circuit located outside the dam structure 170.

[0109] Figure 5 FIG. is a partial cross-sectional view of a display device according to another embodiment of the present disclosure. In the present embodiment, the description will mainly focus on the differences from the above embodiment.

[0110] Referring to Figure 5 , the first control portion 181 and the second control portion 182 may be set as a plurality of protruding structures 81 that pass through at least one of the metal layer 120 and the electrode 130 on the base substrate 110. That is, compared with the control structure 180 of Figure 2 , one or more of the electrode 130 and the metal layer 120 are respectively formed with a first through hole h1 and a second through hole h2 in a region facing the plurality of protruding structures 81, and the plurality of protruding structures 81 may be additionally disposed in the first through hole h1 and the second through hole h2. The plurality of protruding structures 81 in the present embodiment may be additionally disposed in the metal layer 120 and the electrode 130.

[0111] For example, a first through hole h1 that opens in the vertical direction may be formed in the metal layer 120 and the electrode 130 between the display region AA and the first dam portion 171, and the lower portions of the plurality of protruding structures 81 constituting the first control portion 181 may be disposed in the first through hole h1. A second through hole h2 is formed in the metal layer 120 between the first dam portion 171 and the second dam portion 172, and the lower portions of the plurality of protruding structures 81 constituting the second control portion 182 may be disposed in the second through hole h2.

[0112] In the present embodiment, compared with Figure 2Compared with the illustrated embodiments, the plurality of protruding structures 81 can be formed to have a greater height. Therefore, during the inkjet process, the plurality of protruding structures 81 can more stably support the organic material to effectively control its flow.

[0113] Figure 6 FIG. 4 is a partial cross-sectional view of a display device according to another embodiment of the present disclosure. In this embodiment, descriptions of the same configurations overlapping with those of the foregoing embodiments will be omitted, and mainly the differences will be described.

[0114] Referring to Figure 6 , the first control portion 181 and the second control portion 182 can be respectively provided as the first trench 81a and the second trench 81b. The first trench 81a and the second trench 81b are formed in a groove or hole shape and surround the display area AA due to the recess of at least one of the electrode 130 and the metal layer 120. By forming the engraved first trench 81a and second trench 81b in at least one of the metal layer 120 and the electrode 130, when an organic material is applied using an inkjet device, a part of the organic material can flow into the first trench 81a and the second trench 81b. Therefore, when the organic material passes through the first trench 81a and the second trench 81b, the flow rate of the organic material can be reduced.

[0115] For example, the first trench 81a and the second trench 81b can each be provided as more than one, and the first trench 81a can be provided to be spaced apart from each other between the display area AA and the first dam portion 171, and the second trench 81b can be provided to be spaced apart from each other between the first dam portion 171 and the second dam portion 172. For example, a plurality of first trenches 81a can be provided in the metal layer 120 and the electrode 130 located between the display area AA and the first dam portion 171 so as to be spaced apart from each other, and a plurality of second trenches 81b can be provided in the metal layer 120 located between the first dam portion 171 and the second dam portion 172 so as to be spaced apart from each other. The second trench 81b is an auxiliary means formed in preparation for the case where the organic material flows over the first dam portion 171 until the second dam portion 172 is provided when the second encapsulation layer 162 is formed. According to another embodiment, the first trench 81a and the second trench 81b can each be provided as one.

[0116] Therefore, in the case where the control structure 180 is formed as a recessed trench structure, the second encapsulation layer 162 can be provided in the plurality of first trenches 81a of the first control portion 181a, and the third encapsulation layer 163 can be provided in the plurality of second trenches 81b of the second control portion 181b.

[0117] As the first trench 81a and the second trench 81b are formed to have a greater depth, the amount of the organic material flowing into the first trench 81a and the second trench 81b can be increased. When the first trench 81a and the second trench 81b are formed in a hole shape and there is no residual layer at their bottoms, the amount of the organic material flowing into the first trench 81a and the second trench 81b can be maximized so as to most effectively reduce the flow rate of the organic material. However, when the first trench 81a and the second trench 81b are formed in a hole shape, the underlying components may be damaged during the processing. Therefore, the first trench 81a and the second trench 81b can be formed in a groove shape such that as thin a residual layer as possible remains at the bottoms of the first trench 81a and the second trench 81b.

[0118] As in the present embodiment, since the control structure 180 is formed as the first trench 81a and the second trench 81b that are arranged in parallel with the dam structure 170 on the same side of the display area, during the inkjet process of the organic material for forming the second encapsulation layer 162, the organic material does not immediately flow toward the dam structure 170. Instead, as the organic material flows into the first trench 81a and the second trench 81b, the flow rate of the organic material will decrease. Therefore, compared with the case where there are no the first trench 81a and the second trench 81b, it is possible to more easily control the liquid organic material so that the second encapsulation layer 162 is formed into a desired shape.

[0119] The display device 100 according to an embodiment of the present disclosure may include a plurality of guiding portions 190 that guide the flow of the organic material such that when the organic material as the material of the second encapsulation layer 162 is applied, the organic material can uniformly expand toward the dam structure 170.

[0120] Figure 7 is a plan view schematically showing a plurality of guiding portions according to an embodiment of the present disclosure. Figure 7 is showing Figure 1 of the region "C".

[0121] Referring to Figure 7 , the plurality of guiding portions 190 may be disposed close to the first control portion 181 in a direction perpendicular to the first control portion 181, and may be formed by being recessed into at least one of the electrode 130 and the metal layer 120.

[0122] For example, the first control portion 181 may be disposed to be parallel to the first dam portion 171 on the same side of the display area, and a plurality of first control sub-portions of the first control portion 181 may be disposed to be spaced apart from each other in the non-display area NA. The plurality of guiding portions 190 may be disposed in a direction perpendicular to the first control portion 181, and may be formed such that at least a part of the guiding portion is located between the plurality of first control sub-portions. Specifically, both ends of the guiding portion do not protrude from the first control portion 181.

[0123] That is, the first dam portion 171 and the first control portion 181 can be arranged in the horizontal direction in the figure, and the plurality of guiding portions 190 can be arranged in the vertical direction in the figure. For example, the plurality of guiding portions 190 can be arranged between a pair of first control sub-portions so as to be spaced apart from each other, and can be formed such that both ends thereof do not protrude from the first control portion 181.

[0124] Thus, due to the provision of the plurality of guiding portions 190 for guiding the flow of the liquid organic material, when the organic material for forming the second encapsulation layer 162 is applied, the organic material can flow along the direction of the plurality of guiding portions 190. Due to this fact, since the flow of the liquid organic material having fluidity can be more easily controlled, the end portion of the second encapsulation layer 162 can be formed at a desired position after curing. For example, the end portion of the second encapsulation layer 162 can be uniformly extended up to the first dam portion 171.

[0125] Figure 8 is a partial cross-sectional view of a display device in which Figure 7 the guiding portion is formed. In the present embodiment, the description of the same configuration overlapping with that of the previously described embodiment will be omitted, and the description will be mainly directed to the differences.

[0126] Referring to Figure 8 , the plurality of guiding portions 190 can overlap with the second encapsulation layer 162. For example, the guiding portion 190 can be not arranged between the first dam portion 171 and the second dam portion 172.

[0127] Figure 9 is a plan view schematically showing a plurality of guiding portions according to another embodiment of the present disclosure.

[0128] Referring to Figure 9 , a plurality of guiding portions 190' can be provided and arranged between a pair of first control sub-portions of the first control portion 181 so as to be spaced apart from each other. In this figure, the guiding portion 190' can be arranged between a pair of first control sub-portions in a direction perpendicular to the first control portion 181. The end portion of the guiding portion 190' that is arranged closer to the display area AA than the first dam portion 171 in the non-display area NA can protrude outward from the first control portion 181.

[0129] Thus, since the end portions of the plurality of guiding portions 190' protrude outward from the first control portion 181, a part of the liquid organic material can flow into the plurality of guiding portions 190' before the flow of the organic material is blocked by the first control portion 181, thereby achieving the effect of shortening the processing time.

[0130] Figure 10It is a plan view schematically showing a guiding part according to another embodiment of the present disclosure.

[0131] Referring to Figure 10 , a plurality of guiding parts 190” may be provided, and the plurality of guiding parts 190” may be provided between a pair of first control sub-parts along a direction perpendicular to the first control part 181, and an end portion of the guiding part 190” provided to be closer to the display area AA may protrude outward from the first control part 181. Here, some parts of the plurality of guiding parts 190” provided between the pair of first control sub-parts may branch out in two directions from the protruding end portion and be formed to fork in a direction facing the first dam part 171.

[0132] In other words, the plurality of guiding parts 190” may be formed in a “Y” shape. In this way, since the plurality of guiding parts 190” are formed in a “Y” shape, the fluidity can be enhanced, so that a larger amount of organic material can be uniformly extended to the inside of the first dam part 171. Therefore, the processing time for forming the second encapsulation layer 162 can be shortened, and at the same time, the end portion of the second encapsulation layer 162 can be formed at a desired position.

[0133] The following is a brief description of the above embodiments of the present disclosure.

[0134] According to an embodiment of the present disclosure, a display device may be provided, including: a base substrate including a display area and a non-display area surrounding the display area; a metal layer formed on the base substrate in a part of the non-display area and in the display area; an electrode provided on the metal layer; an encapsulation layer provided on the electrode, sealing the top and side portions of the electrode and including an organic layer; a first dam part provided on the base substrate in the non-display area and surrounding the periphery of the organic layer of the encapsulation layer; and a first control part provided on the base substrate between the first dam part and the display area and spaced apart from the first dam part, surrounding at least a part of the display area, and formed to protrude on at least one of the electrode and the metal layer or recess into at least one of the electrode and the metal layer.

[0135] According to an embodiment of the present disclosure, the first control part may be formed parallel to the first dam part on the same side of the display area.

[0136] According to an embodiment of the present disclosure, when the first control part recesses into at least one of the electrode and the metal layer to form a recessed structure, the organic layer of the encapsulation layer may be provided in the recessed part of the first control part.

[0137] According to an embodiment of the present disclosure, when the first control part protrudes on at least one of the electrode and the metal layer and is formed into a plurality of protruding structures, the organic layer of the encapsulation layer may be provided in the space between the plurality of protruding structures.

[0138] According to an embodiment of the present disclosure, when the first control part protrudes on at least one of the electrode and the metal layer, the first control part may be set to protrude on at least one of the electrode and the metal layer so as to surround the protruding structure of the display area.

[0139] According to an embodiment of the present disclosure, at least one of the electrode and the metal layer may be formed with a through hole in a region facing the protruding structure, and the protruding structure may be additionally provided in the through hole.

[0140] According to an embodiment of the present disclosure, the protruding structure may be formed to have a height less than the height of the first dam part.

[0141] According to an embodiment of the present disclosure, a plurality of protruding structures may be provided, and the plurality of protruding structures may be arranged to be spaced apart from each other between the display area and the first dam part.

[0142] According to an embodiment of the present disclosure, since the first control part is recessed into at least one of the electrode and the metal layer, and at least one of the electrode and the metal layer is formed with a recessed groove or hole, the first control part may be set as a trench surrounding at least a part of the display area.

[0143] According to an embodiment of the present disclosure, a plurality of trenches may be provided, and the plurality of trenches may be arranged to be spaced apart from each other between the display area and the first dam part.

[0144] According to an embodiment of the present disclosure, the display device may further include a planarization layer provided on the electrode, and a bank provided on the planarization layer, and the first control part may be formed of the same material as the bank.

[0145] According to an embodiment of the present disclosure, the metal layer may include the same material as at least one of the source electrode and the drain electrode of the thin film transistor provided on the substrate.

[0146] According to an embodiment of the present disclosure, a plurality of guiding parts may be provided close to the first control part in a direction perpendicular to the first control part, and the plurality of guiding parts may be formed by being recessed into at least one of the electrode and the metal layer.

[0147] According to an embodiment of the present disclosure, the first control part may be set to be parallel to the first dam part on the same side of the display area, and may include a plurality of first control sub-parts, and the plurality of first control sub-parts are arranged to be spaced apart from each other in the non-display area; and, a plurality of guiding parts may be provided in a direction perpendicular to the first control part, and the plurality of guiding parts may be formed such that at least a part of the guiding parts is located between the plurality of first control sub-parts.

[0148] According to an embodiment of the present disclosure, both ends of the plurality of guiding parts do not protrude from the first control part.

[0149] According to an embodiment of the present disclosure, an end portion of the guiding part that is disposed closer to the display area may protrude outward from the first control part.

[0150] According to an embodiment of the present disclosure, a part of the guiding part disposed between the plurality of first control sub-parts may branch out in two directions from the protruding end portion and may be formed to fork in a direction facing the first dam part.

[0151] According to an embodiment of the present disclosure, the display device may further include: a second dam part that is disposed on the base substrate in the non-display area so as to be spaced outward from the first dam part and is formed to have a height greater than that of the first dam part; and a second control part that is disposed between the first dam part and the second dam part.

[0152] According to an embodiment of the present disclosure, the display device may further include: a planarization layer disposed on the electrode; and a bank part disposed on the planarization layer, wherein the second control part has the same material as the bank part.

[0153] According to an embodiment of the present disclosure, the second control part may be formed to be parallel to the second dam part on the same side of the display area.

[0154] According to an embodiment of the present disclosure, the second control part may be formed as a protruding structure protruding on the metal layer.

[0155] According to an embodiment of the present disclosure, the metal layer may be formed with through holes in an area facing the protruding structure, and the protruding structure may be additionally disposed in the through holes.

[0156] According to an embodiment of the present disclosure, the protruding structure may be formed to have a height less than that of the first dam part.

[0157] According to an embodiment of the present disclosure, a plurality of protruding structures may be provided, and the plurality of protruding structures may be provided to be spaced apart from each other between the first dam part and the second dam part.

[0158] According to an embodiment of the present disclosure, the metal layer may be formed with recessed grooves or holes, and the second control part may be provided as a groove surrounding at least a part of the display area.

[0159] According to an embodiment of the present disclosure, a plurality of grooves may be provided, and the plurality of grooves may be provided to be spaced apart from each other between the first dam part and the second dam part.

[0160] The foregoing description has been presented to enable those skilled in the art to make and use the inventive concept of the present disclosure and has been provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present disclosure. The foregoing description and drawings have provided examples of the inventive concept of the present disclosure for purposes of illustration only. That is, the disclosed embodiments are intended to illustrate the scope of the inventive concept of the present disclosure.

Claims

1. A display device, comprising: a base substrate comprising a display area and a non-display area surrounding the display area; a metal layer formed on the base substrate in a portion of the non-display area and in the display area; an electrode disposed on the metal layer; an encapsulation layer disposed on the electrode, sealing the top and side of the electrode and comprising an organic layer; a first dam portion, which is disposed on the base substrate in the non-display area and surrounds a periphery of the organic layer of the encapsulation layer; as well as A first control portion is disposed on the base substrate between the first dam portion and the display area and is spaced apart from the first dam portion, surrounds at least a portion of the display area, and is formed to protrude on or be recessed into at least one of the electrode and the metal layer.

2. The display device according to claim 1, wherein: The first control portion is formed in parallel with the first dam portion on the same side of the display area.

3. The display device according to claim 1, wherein: When the first control portion is recessed into the at least one of the electrode and the metal layer and is formed in a recessed structure, the organic layer of the encapsulation layer is disposed in the recessed portion of the first control portion.

4. The display device according to claim 1, wherein: When the first control portion protrudes on the at least one of the electrode and the metal layer and is formed as a plurality of protruding structures, the organic layer of the encapsulation layer is disposed in a space between the plurality of protruding structures.

5. The display device according to claim 1, wherein: When the first control portion protrudes on the at least one of the electrode and the metal layer, the first control portion is provided as a protrusion structure protruding on the at least one of the electrode and the metal layer so as to surround the display area.

6. The display device according to claim 5, wherein: The at least one of the electrode and the metal layer has a through hole formed in a region facing the protrusion structure, and the protrusion structure is additionally disposed in the through hole.

7. The display device according to claim 5, wherein: The protrusion structure is formed to have a height smaller than a height of the first dam portion.

8. The display device according to claim 5, wherein: A plurality of protrusion structures are provided, and the plurality of protrusion structures are disposed to be spaced apart from each other between the display area and the first dam portion.

9. The display device according to claim 1, wherein: In a case where the first control portion is recessed into at least one of the electrode and the metal layer, and a recessed groove or hole is formed in the at least one of the electrode and the metal layer, the first control portion is configured as a groove surrounding at least a portion of the display area.

10. The display device according to claim 9, wherein: A plurality of grooves are provided, and the plurality of grooves are provided to be spaced apart from each other between the display area and the first dam portion.

11. The display device according to claim 1, wherein: The display device further includes: a planarization layer disposed on the electrode, and a bank disposed on the planarization layer, Wherein, the first control portion is formed of the same material as the bank.

12. The display device according to claim 1, wherein: The metal layer includes a same material as at least one of a source electrode and a drain electrode of a thin film transistor disposed on the base substrate.

13. The display device according to claim 1, wherein: A plurality of guide portions are provided near the first control portion in a direction perpendicular to the first control portion, and the plurality of guide portions are formed by being recessed into the at least one of the electrode and the metal layer.

14. The display device according to claim 1, wherein: The first control portion is disposed in parallel with the first dam portion on the same side of the display area, and includes a plurality of first control sub-portions disposed to be spaced apart from each other in the non-display area, and A plurality of guide portions are provided in a direction perpendicular to the first control portion, and the plurality of guide portions are formed such that at least a portion of the guide portion is located between the plurality of first control sub-portions.

15. The display device according to claim 14, wherein: Both ends of the guide portion do not protrude from the first control portion.

16. The display device according to claim 14, wherein: An end portion of the guide portion, which is disposed closer to the display area, protrudes outward from the first control portion.

17. The display device according to claim 14, wherein: A portion of the guide portion provided between the plurality of first control sub-portions is branched in two directions from the protruding end portion and is formed to diverge in a direction facing the first dam portion.

18. The display device according to claim 1, wherein: The display device further includes: a second dam portion which is disposed on the base substrate in the non-display region so as to be outwardly spaced apart from the first dam portion and is formed to have a height greater than that of the first dam portion, and A second control portion is provided between the first dam portion and the second dam portion.

19. The display device according to claim 18, wherein: The display device further includes: a planarization layer disposed on the electrode, and a bank provided on the planarization layer, Wherein, the second control portion has the same material as the bank.

20. The display device according to claim 19, wherein: The second control portion is formed in parallel with the second dam portion on the same side of the display area.

21. The display device according to claim 19, wherein: The second control portion is formed as a protruding structure protruding on the metal layer.

22. The display device according to claim 21, wherein: The metal layer is formed with a through hole in a region facing the protrusion structure, and the protrusion structure is additionally disposed in the through hole.

23. The display device according to claim 21, wherein: The protrusion structure is formed to have a height smaller than a height of the first dam portion.

24. The display device according to claim 21, wherein: A plurality of protrusion structures are provided and are disposed to be spaced apart from each other between the first dam portion and the second dam portion.

25. The display device according to claim 19, wherein: The metal layer is formed with a concave groove or hole, and the second control portion is provided as a groove surrounding at least a portion of the display area.

26. The display device according to claim 25, wherein: A plurality of grooves are provided, and the plurality of grooves are provided to be spaced apart from each other between the first dam portion and the second dam portion.

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