Display device, method of manufacturing display device, and electronic device

Abstract

A display device, a method of manufacturing the same, and an electronic device are provided. The display device includes a base layer disposed across a display area and a non-display area of the display device; a light emitting element disposed on the base layer in the display area, and including an anode electrode, a cathode electrode, and a light emitting portion electrically connected between the anode electrode and the cathode electrode; a first pixel defining layer and a second pixel defining layer disposed on the base layer in the display area; and a dummy dam disposed in the non-display area, on the base layer, and surrounding at least a portion of the display area. The first pixel defining layer extends in a first direction, and the second pixel defining layer extends in a second direction different from the first direction.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2024-0077644, filed on June 14, 2024, and all benefits derived from that application, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] This disclosure relates to a display device, a method of manufacturing the display device, and an electronic device including the display device. Background Technology

[0003] In recent years, with the increasing interest in information display, research and development of display devices have been ongoing.

[0004] The display device may include a light-emitting element comprising an anode electrode and a cathode electrode. The cathode electrode may be electrically connected to another wiring to receive a cathode signal. The cathode electrode and the wiring electrically connected to the cathode electrode may be patterned to fit the entire area of ​​the display device. Summary of the Invention

[0005] One aspect of this disclosure is used to provide a display device, a method of manufacturing the display device, and an electronic device including the display device, wherein a cathode signal path can be clearly formed.

[0006] One aspect of this disclosure is used to provide a display device, a method of manufacturing the display device, and an electronic device including the display device, wherein the display device has improved display quality.

[0007] One aspect of this disclosure is to provide a display device, a method for manufacturing the display device, and an electronic device including the display device, wherein process precision and process efficiency are improved.

[0008] According to embodiments of this disclosure, a display device including a display area and a non-display area can be provided. The display device may include: a substrate layer disposed across the display area and the non-display area; a light-emitting element disposed in the display area and on the substrate layer, and including an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; a first pixel defining layer and a second pixel defining layer disposed in the display area and on the substrate layer; and a dummy dam disposed in the non-display area and on the substrate layer, surrounding at least a portion of the display area. The first pixel defining layer may extend in a first direction, and the second pixel defining layer may extend in a second direction different from the first direction. The light-emitting portion may be disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the second pixel defining layer may have an inverted conical shape. The cross-section of the dummy dam may have a regular conical shape.

[0009] According to an embodiment, the display device may include: a first pixel and a second pixel, adjacent to each other along a second direction, wherein each of the first pixel and the second pixel includes a light-emitting element. Each of the first pixel and the second pixel may include a first sub-pixel region in which light of a first color is provided, a second sub-pixel region in which light of a second color is provided, and a third sub-pixel region in which light of a third color is provided. The first sub-pixel region, the second sub-pixel region, and the third sub-pixel region may be adjacent to a second pixel defining layer in a first direction. The first sub-pixel region of the first pixel and the first sub-pixel region of the second pixel may be adjacent to each other in a second direction. The second sub-pixel region of the first pixel and the second sub-pixel region of the second pixel may be adjacent to each other in a second direction. The third sub-pixel region of the first pixel and the third sub-pixel region of the second pixel may be adjacent to each other in a second direction.

[0010] According to an embodiment, the dummy dam can completely surround the display area.

[0011] According to an embodiment, the dummy dam and the second pixel defining layer may include the same material.

[0012] According to an embodiment, the dummy dam, the first pixel defining layer, and the second pixel defining layer may include organic materials.

[0013] According to an embodiment, the display device may further include: a first cathode connection line disposed in the non-display area and made of the same material as the anode electrode.

[0014] According to an embodiment, the display device may further include: a second cathode connection line, which is made of the same material as the cathode electrode, covers the dummy dam and is electrically connected to the first cathode connection line.

[0015] According to an embodiment, the cathode electrode and the second cathode connection line can be integrated with each other.

[0016] According to an embodiment, the display area can be formed on one side of the dummy dam. The first cathode connection line can be formed on the other side of the dummy dam.

[0017] According to an embodiment, the cross-section of the first pixel defining layer may have a positive conical shape.

[0018] According to embodiments of this disclosure, a display device including a display area and a non-display area can be provided. The display device may include: a substrate layer disposed across the display area and the non-display area; a light-emitting element disposed in the display area and on the substrate layer, and including an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; a first pixel defining layer and a second pixel defining layer disposed in the display area and on the substrate layer; a dummy dam disposed in the non-display area and on the substrate layer, and surrounding at least a portion of the display area; and a connecting pattern layer covering the side surface and top surface of the dummy dam. The first pixel defining layer may extend in a first direction, and the second pixel defining layer extends in a second direction different from the first direction. The light-emitting portion may be disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the first pixel defining layer may have a positive conical shape. The cross-section of the second pixel defining layer may have an inverted conical shape. The cross-section of the dummy dam may have an inverted conical shape. The cross-section of the connecting pattern layer may have a positive conical shape.

[0019] A method for manufacturing a display device according to embodiments of the present disclosure may include: patterning an anode electrode, a first cathode connection line, and a first pixel defining layer extending in a first direction on a substrate layer; patterning a second pixel defining layer extending in a second direction different from the first direction and a dummy dam; forming a light-emitting portion in an area surrounded by the second pixel defining layer using an inkjet process; and forming a cathode electrode and a second cathode connection line. The formation of the cathode electrode and the second cathode connection line may include: completely covering the dummy dam with the second cathode connection line; and integrally forming the second cathode connection line and the cathode electrode together.

[0020] According to an embodiment, patterning the second pixel defining layer and the dummy dam may include performing an exposure process using a photomask comprising a full-tone portion and an intermediate portion. The position of the full-tone portion may correspond to the position of the second pixel defining layer. The position of the intermediate portion may correspond to the position of the dummy dam.

[0021] According to an embodiment, the exposure process includes forming a photoresist layer comprising a negative photoresist.

[0022] According to an embodiment, the cross-section of the dummy dam can have a conical shape.

[0023] According to an embodiment, the cross-section of the first pixel defining layer may have a positive cone shape. The cross-section of the second pixel defining layer may have an inverted cone shape.

[0024] According to an embodiment, patterning the second pixel defining layers may include: patterning a plurality of second pixel defining layers spaced apart in a first direction. Forming the light-emitting portion may include: providing ink comprising a material associated with forming the light-emitting portion between the plurality of second pixel defining layers.

[0025] According to an embodiment, the formation of the second cathode connection line may include: setting the second cathode connection line so that the second cathode connection line is directly adjacent to the dummy dam.

[0026] According to an embodiment, forming a cathode electrode may include: setting the cathode electrode such that the cathode electrode is directly adjacent to the first pixel defining layer.

[0027] According to an embodiment, the patterning of the first cathode connection line and the formation of the cathode electrode and the second cathode connection line may include: forming a cathode signal path through the cathode electrode, the first cathode connection line and the second cathode connection line.

[0028] An electronic device according to embodiments of the present disclosure may include: a processor configured to provide input image data; a display device configured to display an image based on the input image data; and a power supply configured to supply power to the display device. The display device may include a display area and a non-display area. The display device may include: a substrate layer disposed across the display area and the non-display area; a light-emitting element disposed in the display area and on the substrate layer, and including an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; a first pixel defining layer and a second pixel defining layer disposed in the display area and on the substrate layer; and a dummy dam disposed in the non-display area and on the substrate layer, and surrounding at least a portion of the display area. The first pixel defining layer may extend in a first direction, and the second pixel defining layer may extend in a second direction different from the first direction. The light-emitting portion may be disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the second pixel defining layer may have an inverted conical shape. The cross-section of the dummy dam may have a regular conical shape.

[0029] According to embodiments of the present disclosure, a display device, a method of manufacturing the display device, and an electronic device including the display device can be provided, wherein a cathode signal path can be clearly formed.

[0030] According to embodiments of the present disclosure, a display device, a method of manufacturing the display device, and an electronic device including the display device can be provided, wherein the display device has improved display quality.

[0031] According to embodiments of the present disclosure, a display device, a method of manufacturing the display device, and an electronic device including the display device can be provided, wherein process precision and process efficiency are improved. Attached Figure Description

[0032] Figure 1 This is a schematic plan view illustrating a display device according to an embodiment.

[0033] Figure 2 This is a schematic cross-sectional view illustrating a display device according to an embodiment.

[0034] Figure 3 This is a schematic plan view illustrating a display device according to an embodiment.

[0035] Figure 4 This is a schematic plan view illustrating the inkjet printing process used to form the light-emitting part.

[0036] Figure 5 and Figure 6 This is a schematic cross-sectional view of a display device according to a first embodiment.

[0037] Figure 7 and Figure 8 This is a schematic cross-sectional view of a display device according to a second embodiment.

[0038] Figure 9 This is a flowchart illustrating a method for manufacturing a display device according to a first embodiment.

[0039] Figures 10 to 17 This is a schematic cross-sectional view illustrating the various process steps of a method for manufacturing a display device according to the first embodiment.

[0040] Figure 18 This is a flowchart illustrating a method for manufacturing a display device according to a second embodiment.

[0041] Figures 19 to 26 This is a schematic cross-sectional view illustrating the various process steps of a method for manufacturing a display device according to the second embodiment.

[0042] Figure 27 This is a schematic block diagram illustrating an electronic device including a display device according to an embodiment.

[0043] Figure 28 It is shown in the diagram. Figure 27 A schematic diagram illustrating an example of an electronic device implemented as a smartphone.

[0044] Figure 29 It is shown in the diagram. Figure 27 A schematic diagram illustrating an example of an electronic device implemented as a tablet computer. Detailed Implementation

[0045] This disclosure may be modified in various ways and may take many forms, and specific embodiments are illustrated in the accompanying drawings and described in detail herein. However, this is not intended to limit this disclosure to any particular form, but should be understood to include all variations, equivalents, or substitutions falling within the scope of the ideas and techniques of this disclosure.

[0046] For example, terms such as “first” and “second” may be used to describe various components, but components should not be limited by these terms. These terms are used for the purpose of distinguishing one component from another and should not be limiting. For example, a first component may be named a second component without exceeding the scope of the claims of this disclosure, and similarly, a second component may be named a first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0047] In this disclosure, the terms "comprising," "including," or "having" should be understood to mean the presence of a feature, number, step, action, component, part, or combination thereof set forth in this disclosure, and should be understood not to exclude the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In some aspects, for example, when a portion such as a layer, film, region, or plate is referred to as being "on" another portion, this includes not only the case where the portion is "directly on" the other portion, but also the case where there is another portion between the portion and the other portion. In some aspects, in this specification, for example, when a portion such as a layer, film, region, or plate is referred to as being formed on another portion, the direction in which the portion is formed is not limited to the upward direction, but includes formation in the transverse or downward direction. Similarly, for example, when a portion such as a layer, film, region, or plate is referred to as being "below" another portion, this includes not only the case where the portion is "directly below" the other portion, but also the case where there is another portion between the portion and the other portion.

[0048] As used herein, the term “substantially” means approximately or actually. The term “substantially equal” means approximately equal or actually equal. The term “substantially identical” means approximately identical or actually identical. The term “substantially consistent” means approximately consistent or actually consistent.

[0049] This disclosure relates to a display device, a method of manufacturing the display device, and an electronic device including the display device. Hereinafter, the display device, the method of manufacturing the display device, and the electronic device including the display device will be described with reference to the accompanying drawings.

[0050] Figure 1 This is a schematic plan view of a display device DD according to an embodiment.

[0051] refer to Figure 1 The display device DD includes a substrate layer BSL and pixels PXL disposed on the substrate layer BSL. The display device DD may further include a dummy dam DUM. The display device DD may further include driving circuit units (e.g., scan driving units and data driving units), wiring, and pads for driving pixels PXL.

[0052] The display device DD (or base layer BSL) may include a display area DA and a non-display area NDA. The non-display area NDA may refer to an area other than the display area DA. The non-display area NDA may surround at least a portion of the display area DA.

[0053] A substrate layer (BSL) can form the substrate surface of a display device (DD). The substrate layer (BSL) can span the display area (DA) and the non-display area (NDA). According to an embodiment, the substrate layer (BSL) can be a lower substrate for forming the layers of the display device (DD). The substrate layer (BSL) can be a rigid or flexible substrate or film. For example, the substrate layer (BSL) can include a glass material. Alternatively, the substrate layer (BSL) can include a silicone material. Alternatively, the substrate layer (BSL) can include polyimide. However, embodiments of this disclosure are not limited thereto.

[0054] The plane defined herein can be defined as a plane extending in the first direction DR1 and the second direction DR2, based on the plane on which the substrate layer BSL is disposed. According to an embodiment, the third direction DR3 can be the thickness direction of the substrate layer BSL, and the third direction DR3 can be the light emission direction of the display device DD.

[0055] The display area DA can refer to the area where pixels PXL are set. The non-display area NDA can refer to the area where pixels PXL are not set. The driving circuit units, wiring, and pads of the pixels PXL connected to the display area DA can be set in the non-display area NDA.

[0056] The dummy dam DUM can be located in the non-display area NDA. The dummy dam DUM can be located on the periphery of the display area DA. The dummy dam DUM can surround at least a portion of the display area DA. According to an embodiment, the dummy dam DUM can completely surround the display area DA. For example, the dummy dam DUM can have a closed-loop shape. However, embodiments of this disclosure are not limited thereto.

[0057] A dummy dam (DUM) can be a dam structure and can protrude in the thickness direction of the base layer (BSL) (e.g., on the third direction DR3).

[0058] A dummy dam (DUM) can reduce the risk of ink over-drying during inkjet printing to form a specific configuration in the display area (DA). In some aspects, according to embodiments, the dummy dam (DUM) is patterned to correspond to the position of the display area (DA), so that the position of the display area (DA) can be substantially defined.

[0059] According to an embodiment, pixel PXL (or sub-pixel SPX) can be based on stripes or The array structure arrangement is possible, but not limited to, and various forms of embodiments can be applied to this disclosure.

[0060] According to an embodiment, a pixel PXL (or sub-pixel SPX) may include a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. Each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may be a sub-pixel. At least one first sub-pixel SPX1, at least one second sub-pixel SPX2, and at least one third sub-pixel SPX3 may form a single pixel unit capable of emitting light of various colors.

[0061] Each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 can emit light of a single color.

[0062] For example, the first sub-pixel SPX1 can be a red pixel that emits red light (e.g., light of a first color), the second sub-pixel SPX2 can be a green pixel that emits green light (e.g., light of a second color), and the third sub-pixel SPX3 can be a blue pixel that emits blue light (e.g., light of a third color). The red pixel can provide light in the wavelength band of 600nm to 750nm. The green pixel can provide light in the wavelength band of 480nm to 560nm. The blue pixel can provide light in the wavelength band of 370nm to 460nm.

[0063] According to an embodiment, the number of second sub-pixels SPX2 can be greater than the number of first sub-pixels SPX1 and the number of third sub-pixels SPX3. However, the color, type, and / or number of the first sub-pixels SPX1, second sub-pixels SPX2, and third sub-pixels SPX3 forming each pixel unit are not limited to the specific example.

[0064] Figure 2 This is a schematic cross-sectional view of the display device DD according to an embodiment.

[0065] refer to Figure 2 The display device DD may include a pixel circuit layer PCL and a light-emitting element layer LEL. The display device DD may further include an upper UL layer.

[0066] The pixel circuit layer PCL may include the base layer BSL (see [link]). Figure 5 The pixel circuit layer (PCL) can include pixel circuitry (PXC) (see [link]). Figure 5 The pixel circuit layer (PCL) can be a backplane layer. The pixel circuitry (PXC) can be formed on the substrate layer (BSL) and configured to drive the light-emitting element (LD) (see [link to documentation]). Figure 5 The pixel circuit layer (PCL) may include a conductive layer and an insulating layer, and the conductive layer may form the pixel circuit (PXC). The pixel circuit (PXC) may include circuit elements. The circuit elements may include driving transistors, and may also include additional transistors and capacitors.

[0067] The light-emitting element layer (LEL) can be disposed on the pixel circuit layer (PCL). The LEL can be a layer from which light is supplied, and can include light-emitting elements (LDs).

[0068] The upper UL layer can be disposed on the light-emitting element layer LEL. The upper UL layer can include various light-transmitting layers, such as, for example, a cover window. According to embodiments, the upper UL layer can include a color filter, can include a range array layer, and can include a polarizing layer. However, this disclosure is not limited to the specific examples.

[0069] refer to Figures 3 to 8 The present invention will describe a display device DD comprising a dummy dam DUM, a first pixel limiting layer PDL1, and a second pixel limiting layer PDL2 according to an embodiment.

[0070] Figure 3 This is a schematic plan view of a display device DD according to an embodiment.

[0071] Figure 3 It is a schematic planar structure of the display area DA and non-display area NDA of the display device DD, wherein the dummy dam DUM is set around the display area DA.

[0072] Figure 4 This is a schematic plan view illustrating the inkjet printing process that supports the formation of the light-emitting part. Figure 4 The diagram shows the first pixel PXL1 and the second pixel PXL2 that are adjacent to each other.

[0073] Figure 5 and Figure 6 This is a schematic cross-sectional view of the display device DD according to the first embodiment. Figure 5 It is along Figure 3 A schematic cross-sectional view of line AA'. Figure 6 It is along Figure 3 A schematic cross-sectional view of line BB'.

[0074] Figure 7 and Figure 8 This is a schematic cross-sectional view of the display device DD according to the second embodiment. Figure 7 It is along Figure 3 A schematic cross-sectional view of line AA'. Figure 8 It is along Figure 3 A schematic cross-sectional view of line BB'.

[0075] First, refer to Figures 3 to 6 The display device DD according to the first embodiment is described.

[0076] refer to Figures 3 to 6The display device DD may include a pixel PXL, a first pixel limiting layer PDL1 and a second pixel limiting layer PDL2 in the display area DA, and may include a dummy dam DUM in the non-display area NDA.

[0077] Pixel PXL comprises multiple pixels. For example, pixel PXL may include a first pixel PXL1 and a second pixel PXL2 that are adjacent to each other. According to an embodiment, the first pixel PXL1 and the second pixel PXL2 may be adjacent in the second direction DR2.

[0078] Pixel PXL may include sub-pixels SPX comprising first to third sub-pixels SPX1 to SPX3. Sub-pixels SPX may form sub-pixel region SPXA. Sub-pixel region SPXA may be a region emitting monochromatic light. For example, sub-pixel region SPXAA may include a first sub-pixel region SPXA1 formed by the first sub-pixel SPX1 from which light of a first color is emitted, a second sub-pixel region SPXA2 formed by the second sub-pixel SPX2 from which light of a second color is emitted, and a third sub-pixel region SPXA3 formed by the third sub-pixel SPX3 from which light of a third color is emitted.

[0079] According to an embodiment, sub-pixels SPX of each of the first pixel PXL1 and the second pixel PXL2 that provide light of the same color can be adjacent to each other along the direction of the extension of the second pixel defining layer PDL2 (e.g., the second direction DR2).

[0080] For example, the first sub-pixel SPX1 (or first sub-pixel region SPXA1) of the first pixel PXL1 and the first sub-pixel SPX1 (or first sub-pixel region SPXA1) of the second pixel PXL2 can be adjacent along the second direction DR2. The second sub-pixel SPX2 (or second sub-pixel region SPXA2) of the first pixel PXL1 and the second sub-pixel SPX2 (or second sub-pixel region SPXA2) of the second pixel PXL2 can be adjacent along the second direction DR2. The third sub-pixel SPX3 (or third sub-pixel region SPXA3) of the first pixel PXL1 and the third sub-pixel SPX3 (or third sub-pixel region SPXA3) of the second pixel PXL2 can be adjacent along the second direction DR2.

[0081] The first pixel limiting layer PDL1 can extend along the first direction DR1 in the display area DA. The first pixel limiting layer PDL1 can be formed into multiple parts, and the first pixel limiting layer PDL1 can be set along the second direction DR2.

[0082] The first pixel-defining layer PDL1 can protrude in the thickness direction of the base layer BSL (e.g., the third-direction DR3).

[0083] The second pixel limiting layer PDL2 may extend in a different direction from the first pixel limiting layer PDL1. The second pixel limiting layer PDL2 may extend along the second direction DR2 in the display area DA. The second pixel limiting layer PDL2 may be formed into multiple parts, and the second pixel limiting layer PDL2 may be set along the first direction DR1.

[0084] The second pixel-defining layer PDL2 can protrude in the thickness direction of the base layer BSL (e.g., the third-direction DR3).

[0085] The first pixel-defining layer PDL1 and the second pixel-defining layer PDL2 can surround a region and form an opening OPN. For example, the first pixel-defining layer PDL1 and the second pixel-defining layer PDL2 can be arranged around a region, each in a different direction. The first pixel-defining layer PDL1 and the second pixel-defining layer PDL2 can have a protruding structure.

[0086] The area surrounded by the first pixel defining layer PDL1 and the second pixel defining layer PDL2 can correspond to the sub-pixel area SPXA. For example, the light-emitting portion EL can be disposed in the area surrounded by the first pixel defining layer PDL1 and the second pixel defining layer PDL2, and the sub-pixel area SPXA can be formed.

[0087] According to an embodiment, the sub-pixel region SPXA may be adjacent to the second pixel defining layer PDL2 along the first direction DR1. For example, each of the first to third sub-pixel regions SPXA1 to SPXA3 may be adjacent to the second pixel defining layer PDL2 along the first direction DR1.

[0088] The first pixel-defining layer PDL1 and the second pixel-defining layer PDL2 can be patterned in different processes and can be located in different layers. For example, the second pixel-defining layer PDL2 can be patterned after the first pixel-defining layer PDL1 is patterned.

[0089] A virtual dam (DUM) can be set in the non-display area (NDA) and configured to surround the display area (DA).

[0090] The dummy dam (DUM) can be made of the same material as the second pixel defining layer (PDL2). For example, the dummy dam (DUM) can be patterned in the same process as the second pixel defining layer (PDL2).

[0091] The first pixel defining layer PDL1, the second pixel defining layer PDL2, and the dummy dam DUM may include insulating materials. For example, the first pixel defining layer PDL1, the second pixel defining layer PDL2, and the dummy dam DUM may include organic materials. Organic materials may include one or more of acrylic resins, epoxy resins, phenolic resins, polyamide resins, and polyimide resins. However, embodiments of this disclosure are not limited thereto.

[0092] According to an embodiment, the light-emitting portion EL can be formed using an inkjet printing process. For example, the first pixel defining layer PDL1 and the second pixel defining layer PDL2 can form an open OPN and have hydrophobic properties. Therefore, the light-emitting portion EL can be appropriately provided in the open OPN using an inkjet printing process.

[0093] According to an embodiment, the opening OPN in the area where the light-emitting portion EL is provided based on an inkjet printing process can be defined by a first pixel defining layer PDL1 and a second pixel defining layer PDL2 extending in a predetermined direction, and in this case, a display device DD with improved display quality, as well as improved process accuracy and process efficiency, can be provided. This combines... Figure 4 To explain.

[0094] According to an embodiment, ink INK, including the material supporting the formation of the light-emitting portion EL, can be provided using a printing apparatus PRI that includes nozzle portions NOZ. The printing apparatus PRI can be a device configured to discharge fluid (such as, for example, ink INK). According to an embodiment, multiple nozzle portions NOZ can be formed, and the nozzle portions NOZ can be arranged sequentially along a second direction DR2.

[0095] As described herein, subpixels SPX of each of the different pixels PXL that are adjacent to each other along the direction extending along the second pixel defining layer PDL2 can provide light of the same color. Therefore, the area in which the ink INK is provided can be defined by the second pixel defining layer PDL2 and can extend along the second direction DR2.

[0096] In other words, the area where ink INK is supplied can be formed across the first pixel PXL1 and the second pixel PXL2, and the operating activity rate of the nozzle portion NOZ of the printing apparatus PRI can be high during the inkjet printing process. For example, in experiments, when the target areas to which ink INK is supplied are not formed continuously but spaced apart from each other, the nozzle portion NOZ corresponding to the intermediate area between the target areas does not need to operate during the inkjet printing process. However, according to the embodiment, since the target areas to which ink INK is supplied are formed continuously along the second direction DR2, the inactivity rate of the nozzle portion NOZ is reduced, and as a result, process efficiency can be improved.

[0097] In some aspects, because the activity rate of the nozzle portion NOZ is high during the inkjet printing process, the amount of ink INK can be controlled more precisely. Therefore, process precision is improved, and because the amount of material forming the light-emitting portion EL of each sub-pixel SPX is appropriately controlled, luminous uniformity can be improved. Thus, a display device DD with improved display quality can be provided by reducing the risk of, for example, speckles.

[0098] refer to Figure 5 and Figure 6 This will describe the cross-sectional structure of the display device DD.

[0099] According to an embodiment, the pixel circuit layer PCL may include a base layer BSL and pixel circuits PXC on the base layer BSL. The pixel circuits PXC may include a first pixel circuit PXC1 driving a first sub-pixel SPX1 (or the light-emitting element LD of the first sub-pixel SPX1), a second pixel circuit PXC2 driving a second sub-pixel SPX2 (or the light-emitting element LD of the second sub-pixel SPX2), and a third pixel circuit PXC3 driving a third sub-pixel SPX3 (or the light-emitting element LD of the third sub-pixel SPX3).

[0100] The light-emitting element layer LEL is disposed on the pixel circuit layer PCL, and may include an anode electrode AE, a light-emitting portion EL, a cathode electrode CE, a first cathode connection line CCE1, a first pixel limiting layer PDL1, a second pixel limiting layer PDL2, a dummy dam DUM, and a second cathode connection line CCE2.

[0101] The anode electrode AE ​​can be disposed on the pixel circuit layer PCL. The anode electrode AE ​​may include a first anode electrode AE1 disposed in the first sub-pixel region SPXA1 and forming the first sub-pixel SPX1, a second anode electrode AE2 disposed in the second sub-pixel region SPXA2 and forming the second sub-pixel SPX2, and a third anode electrode AE3 disposed in the third sub-pixel region SPXA3 and forming the third sub-pixel SPX3. The anode electrode AE ​​may include various conductive materials. For example, the anode electrode AE ​​may include a reflective metal, or it may include a transparent conductive material.

[0102] The light-emitting portion (EL) can be electrically connected between the cathode electrode (CE) and the anode electrode (AE). The light-emitting portion (EL) can include multiple layers. For example, the light-emitting portion (EL) can include multiple layers comprising a hole transport unit (HTU), a light-emitting layer (EML) (or a light-generating layer), and an electron transport unit (ETU). Each of the layers forming the light-emitting portion (EL) can include an organic material, and according to embodiments, can further include inorganic materials such as, for example, compounds containing metals or quantum dots.

[0103] The hole transport unit (HTU) may include a multilayer structure having multiple layers, each comprising different materials. For example, the HTU may include a hole injection layer and a hole transport layer, and according to an embodiment, the HTU may further include a light-emitting auxiliary layer and an electron-blocking layer.

[0104] The hole transmission unit (HTU) may include a first hole transmission unit (HTU1) disposed in the first sub-pixel region SPXA1 and forming the first sub-pixel SPX1, a second hole transmission unit (HTU2) disposed in the second sub-pixel region SPXA2 and forming the second sub-pixel SPX2, and a third hole transmission unit (HTU3) disposed in the third sub-pixel region SPXA3 and forming the third sub-pixel SPX3.

[0105] The emissive layer (EML) may include a material capable of emitting light of a single color. The EML may include a host and dopants. The host of the EML is a light-emitting material capable of trapping charge carriers (electrons and holes) to generate light and capable of inducing efficient exciton generation. Dopants may include phosphorescent or fluorescent dopants. Examples of dopants are not specifically limited according to embodiments. According to embodiments, dopants may include organic materials and may also include metal complexes, etc.

[0106] The light-emitting layer EML may include a first light-emitting layer EML1 disposed in the first sub-pixel region SPXA1 and forming the first sub-pixel SPX1, a second light-emitting layer EML2 disposed in the second sub-pixel region SPXA2 and forming the second sub-pixel SPX2, and a third light-emitting layer EML3 disposed in the third sub-pixel region SPXA3 and forming the third sub-pixel SPX3.

[0107] An electron transport unit (ETU) may include a multilayer structure having multiple layers, each comprising different materials. The ETU may include an electron injection layer and an electron transport layer, and according to embodiments, the ETU may further include an electron buffer layer and a hole blocking layer, etc.

[0108] The electronic transmission unit (ETU) may include a first electronic transmission unit (ETU1) disposed in the first sub-pixel region SPXA1 and forming the first sub-pixel SPX1, a second electronic transmission unit (ETU2) disposed in the second sub-pixel region SPXA2 and forming the second sub-pixel SPX2, and a third electronic transmission unit (ETU3) disposed in the third sub-pixel region SPXA3 and forming the third sub-pixel SPX3.

[0109] According to an embodiment, the light-emitting portion EL can be formed based on an inkjet printing process. For example, ink INK comprising the material forming the light-emitting portion EL can be supplied in the area surrounded by the second pixel defining layer PDL2.

[0110] The cathode electrode CE can be disposed on the light-emitting portion EL, the first pixel defining layer PDL1, and the second pixel defining layer PDL2. The cathode electrode CE can be disposed across the first to third sub-pixel regions SPXA1 to SPXA3. The cathode electrode CE can be a common electrode for the first to third sub-pixels SPX1 to SPX3. The cathode electrode CE can include various conductive materials. For example, the cathode electrode CE can include a transparent conductive material. However, the embodiments of this disclosure are not limited thereto.

[0111] According to an embodiment, the anode electrode AE, the light-emitting portion EL, and the cathode electrode CE can form a light-emitting element LD.

[0112] The first cathode connection line CCE1 can be disposed in the non-display area NDA, on the pixel circuit layer PCL. The first cathode connection line CCE1 can be patterned in the same process as the anode electrode AE, and can include the same conductive material.

[0113] The first cathode connection line CCE1 can be located on the outside of the dummy dam DUM. For example, the display area DA can be formed on one side of the dummy dam DUM, and the first cathode connection line CCE1 can be located on the other side of the dummy dam DUM.

[0114] The first cathode connection line CCE1 can be electrically connected to a cathode power line (not shown) that supplies cathode power voltage. Therefore, cathode power voltage can be appropriately applied to the first cathode connection line CCE1.

[0115] The first pixel definition layer PDL1 can be disposed on the pixel circuit layer PCL. The first pixel definition layer PDL1 can cover a portion of the anode electrode AE ​​and expose another portion of the anode electrode AE.

[0116] According to an embodiment, the cross-section of the first pixel defining layer PDL1 may have a positive conical shape. For example, the side surface of the first pixel defining layer PDL1 may have an angle of less than 90 degrees relative to the plane on which the base layer BSL is disposed.

[0117] The second pixel definition layer PDL2 can be disposed on the pixel circuit layer PCL. The second pixel definition layer PDL2 can cover a portion of the anode electrode AE ​​and expose another portion of the anode electrode AE.

[0118] According to an embodiment, the first pixel definition layer PDL1 and the second pixel definition layer PDL2 may overlap in some areas of the planar diagram.

[0119] According to an embodiment, the cross-section of the second pixel defining layer PDL2 may have an inverted conical shape. For example, the side surface of the second pixel defining layer PDL2 may have an angle greater than 90 degrees relative to the plane on which the base layer BSL is disposed.

[0120] The description of a component with a positive conical cross-section in this article can refer to the cross-section of a component with a positive conical shape. The description of a component with an inverted conical cross-section in this article can refer to the cross-section of a component with an inverted conical shape.

[0121] As described herein, the light-emitting portion (EL) can be formed based on an inkjet printing process. According to an embodiment, ink INK comprising the material forming the light-emitting portion (EL) can be supplied to the area surrounded by a second pixel defining layer (PDL2). Because the cross-section of the second pixel defining layer (PDL2) has an inverted conical shape, the ink INK can be more effectively contained within the area surrounded by the second pixel defining layer (PDL2).

[0122] A dummy dam (DUM) can be set on the pixel circuit layer (PCL). The dummy dam (DUM) can cover a portion of the first cathode connection line (CCE1) and expose another portion of the first cathode connection line (CCE1).

[0123] According to an embodiment, the cross-section of the dummy dam DUM can have a conical shape. For example, the side surface of the dummy dam DUM can have an angle of less than 90 degrees relative to the plane on which the base layer BSL is disposed.

[0124] The second cathode connection line CCE2 can be disposed on the pixel circuit layer PCL and can cover the dummy dam DUM and the first cathode connection line CCE1. The second cathode connection line CCE2 can be patterned in the same process as the cathode electrode CE and can include the same conductive material.

[0125] According to the embodiment, the second cathode connection line CCE2 can completely cover the upper and side surfaces of the dummy dam DUM.

[0126] A portion of the second cathode connection line CCE2 can be electrically connected to the first cathode connection line CCE1. Therefore, the second cathode connection line CCE2 can receive cathode power voltage.

[0127] According to the embodiment, since the cross-section of the dummy dam DUM has a positive conical shape, the second cathode connection line CCE2 set on the dummy dam DUM can be continuously connected, and the second cathode connection line CCE2 can continuously form a cathode signal path.

[0128] Another portion of the second cathode connection line CCE2 can be electrically connected to the cathode electrode CE. For example, the second cathode connection line CCE2 can be integrally formed with the cathode electrode CE. Therefore, the cathode power voltage supplied to the first cathode connection line CCE1 can be applied to the cathode electrode CE through the second cathode connection line CCE2. Thus, the cathode signal can be normally supplied to the light-emitting element LD, and light can be provided appropriately.

[0129] According to the embodiment, since the cross-section of the first pixel defining layer PDL1 has a positive conical shape, the cathode electrode CE disposed on the first pixel defining layer PDL1 can be continuously connected, and the cathode electrode CE can continuously form a cathode signal path.

[0130] Therefore, according to the embodiment, due to the cross-sectional shape of the dummy dam DUM and the first pixel defining layer PDL1, the cathode signal path to which the cathode power voltage can be supplied can be clearly formed, and the operational reliability of the light-emitting element LD can be improved.

[0131] In some embodiments, the light-emitting element layer (LEL) may further include an encapsulation layer (not shown). For example, the encapsulation layer may be disposed on the light-emitting element (LD) (e.g., cathode electrode CE). The encapsulation layer may include multiple insulating layers covering the light-emitting element (LD). According to embodiments, the encapsulation layer may include inorganic and organic layers. For example, the encapsulation layer may have a structure in which a first inorganic layer / organic layer / second inorganic layer are sequentially arranged. However, embodiments of this disclosure are not limited thereto. According to embodiments, the encapsulation layer may be a thin-film encapsulation film.

[0132] Next, we will refer to Figure 3 , Figure 7 and Figure 8 The display device DD according to the second embodiment is described. Content that may overlap with descriptions of other display devices DD described herein will be briefly described or will not be repeated.

[0133] refer to Figure 3 , Figure 7 and Figure 8 The display device DD according to the second embodiment differs from the display device DD according to the first embodiment in that the display device DD according to the second embodiment further includes a connecting pattern layer COP.

[0134] According to an embodiment, the cross-section of the dummy dam DUM can have an inverted conical shape. For example, the side surface of the dummy dam DUM can have an angle of more than 90 degrees relative to the plane on which the base layer BSL is disposed.

[0135] According to an embodiment, the display device DD may further include a connecting pattern layer COP.

[0136] The connecting pattern layer COP can be applied to a dummy dam DUM with an inverted conical cross-section. The connecting pattern layer COP can cover both the top and side surfaces of the dummy dam DUM. For example, the connecting pattern layer COP can cover both the first and second side surfaces of the dummy dam DUM.

[0137] According to embodiments, the connecting patterned layer COP can include various organic materials. However, this disclosure is not limited to specific examples.

[0138] The cross-section of the connecting patterned layer COP can have a positive conical shape. For example, the side surface of the connecting patterned layer COP can have an angle of less than 90 degrees relative to the plane on which the base layer BSL is disposed.

[0139] According to an embodiment, the second cathode connection line CCE2 can be disposed on the connection pattern layer COP and can cover the upper surface and side surface of the connection pattern layer COP.

[0140] According to the embodiment, the cross-section of the dummy dam DUM has an inverted conical shape, but the cross-section of the connecting pattern layer COP has a positive conical shape, so that the second cathode connecting line CCE2 disposed on the dummy dam DUM and the connecting pattern layer COP can be continuously connected, and the second cathode connecting line CCE2 can continuously form a cathode signal path.

[0141] refer to Figures 9 to 26 This document describes a method for manufacturing a display device DD according to an embodiment. Descriptions that may overlap with descriptions of other display devices DD or methods described herein will be brief or will not be repeated.

[0142] In the description of the methods and processes herein, operations may be performed in a different order than those shown and / or described, or operations may be performed in a different order or at different times. Specific operations may also be omitted in the flowchart, one or more operations may be repeated, or additional operations may be added. Based on the example aspects described herein, the descriptions of elements such as "can be set" and "can be formed" include methods, processes, and techniques for setting, forming, placing, and modifying elements, etc.

[0143] First, refer to Figures 9 to 17 A method for manufacturing a display device DD according to a first embodiment will be described.

[0144] Figure 9 This is a flowchart illustrating a method for manufacturing a display device DD according to a first embodiment.

[0145] Figures 10 to 17 This is a schematic cross-sectional view illustrating the various process steps of a method for manufacturing a display device DD according to the first embodiment. For ease of explanation, Figures 10 to 13 Based on the references in this article Figure 5 The described cross-sectional structure is illustrated. For ease of explanation, Figures 14 to 17 Based on the references in this article Figure 6 The described cross-sectional structure is illustrated.

[0146] refer to Figure 9The method for manufacturing a display device DD according to an embodiment may include patterning an anode electrode, a first cathode connection line and a first pixel defining layer (S100), patterning a second pixel defining layer and a dummy dam (S200), forming a light-emitting portion (S300), and forming a cathode electrode and a second cathode connection line (S400).

[0147] refer to Figure 9 , Figure 10 and Figure 14 When patterning the anode electrode, the first cathode connection line, and the first pixel defining layer (S100), the method may include providing a pixel circuit layer PCL, and further, providing the anode electrode AE, the first cathode connection line CCE1, and the first pixel defining layer PDL1 on the pixel circuit layer PCL.

[0148] In this step (S100), the method may include patterning the first to third pixel circuits PXC1 to PXC3 on the substrate layer BSL.

[0149] According to embodiments, the method may include forming a conductive layer or an insulating layer on a substrate layer (BSL) based on conventional processes used for manufacturing semiconductor devices. For example, the method may include forming the conductive layer or insulating layer on the BSL using a photolithography process, etching the conductive layer or insulating layer using various methods (such as wet etching and dry etching), and depositing the conductive layer or insulating layer using various methods (such as sputtering and chemical vapor deposition). This disclosure is not necessarily limited to specific examples.

[0150] In this step (S100), the method may include patterning the anode electrode AE ​​and the first cathode connection line CCE1 in the same process.

[0151] In this step (S100), after patterning the anode electrode AE ​​and the first cathode connection line CCE1, the method may include patterning a first pixel-defining layer PDL1 covering the anode electrode AE. (See reference...) Figure 3 The first pixel-defining layer PDL1 can be patterned such that the first pixel-defining layer PDL1 extends along the first direction DR1.

[0152] refer to Figure 9 , Figure 11 and Figure 15 When patterning the second pixel definition layer and the dummy dam (S200), the method may include using a photomask MAS to pattern the second pixel definition layer PDL2 and the dummy dam DUM.

[0153] In this step (S200), the method may include forming (e.g., depositing) an organic insulating layer associated with the formation of the second pixel defining layer PDL2 and the dummy dam DUM, and further, forming a photoresist layer on the organic insulating layer. According to an embodiment, the method may include patterning (e.g., exposing) the photoresist layer using a photomask MAS to fabricate an etch mask, and further, patterning the organic insulating layer using the fabricated etch mask to provide the second pixel defining layer PDL2 and the dummy dam DUM.

[0154] According to embodiments, the photoresist layer may include a negative photoresist. However, this disclosure is not necessarily limited thereto. For ease of explanation, the following description will be based on embodiments in which the photoresist layer includes a negative photoresist.

[0155] According to an embodiment, a photomask (MAS) may include a full-tone portion (FP), a middle portion (MP), and a blocking portion (BP). The full-tone portion (FP) may transmit light during the exposure process. The middle portion (MP) may partially transmit and / or transmit some light during the exposure process. The blocking portion (BP) may block light during the exposure process. According to an embodiment, the middle portion (MP) may be a slit portion or a halftone portion.

[0156] In this step (S200), the position of the full-tone portion FP can correspond to the position of the second pixel-defining layer PDL2. In the planar view, the position of the full-tone portion FP can overlap with the second pixel-defining layer PDL2. According to the embodiment, since a negative photoresist is used, the photoresist can be retained at the position of the full-tone portion FP, and a second pixel-defining layer PDL2 with an inverted conical cross-section can be provided.

[0157] In this step (S200), the position of the intermediate portion MP can correspond to the position of the dummy dam DUM. In a plan view, the position of the intermediate portion MP can overlap with the dummy dam DUM. According to an embodiment, since a negative photoresist is used, the photoresist can be partially retained or thinly formed (e.g., with a thickness less than a threshold) at the position of the intermediate portion MP, and after performing the etching process, the method can include reflowing the material that forms the dummy dam DUM, such that the material provides a dummy dam DUM with a positive conical cross-section.

[0158] In this step (S200), the position of the blocking portion BP can correspond to the area where the second pixel defining layer PDL2 and the dummy dam DUM are not set. In the plan view, the position of the blocking portion BP can overlap with the area where the second pixel defining layer PDL2 and the dummy dam DUM are not set. According to the embodiment, since a negative photoresist is used, the photoresist can be removed at the position of the blocking portion BP, and the second pixel defining layer PDL2 and the dummy dam DUM may not be formed at the position corresponding to the blocking portion BP.

[0159] In this step (S200), when combined Figure 3 In the latter case, the method may include patterning the second pixel definition layer PDL2 such that the second pixel definition layer PDL2 extends along the second direction DR2.

[0160] refer to Figure 9 , Figure 12 and Figure 16 When forming the light-emitting portion (S300), the method may include forming the light-emitting portion EL based on an inkjet printing process.

[0161] In this step (S300), the method may include sequentially ejecting (i.e., discharging) ink INK, comprising materials and solvents (e.g., organic solvents) supporting each layer forming the light-emitting portion EL, via the nozzle portion NOZ of the printing apparatus PRI. The ink INK may be provided to the area surrounded by the second pixel-defined layer PDL2. Thereafter, for example, the method may include performing a drying process that can remove the solvents included in the ink INK.

[0162] In this step (S300), when combined Figure 3 and Figure 4 In this regard, ink INK can be supplied between second pixel defining layers PDL2 that are disposed across adjacent first pixels PXL1 and second pixels PXL2. For example, ink INK can be supplied between adjacent second pixel defining layers PDL2 in the first direction DR1. The term "adjacent" as used herein can refer to elements that are relatively close to each other (e.g., within a threshold distance) or elements that are in contact with each other.

[0163] As described in this article, since the cross-section of the second pixel defining layer PDL2 has an inverted conical shape, the ink INK can be appropriately contained in the area surrounded by the second pixel defining layer PDL2.

[0164] refer to Figure 9 , Figure 13 and Figure 17 When forming the cathode electrode and the second cathode connection line (S400), the method may include fully depositing a conductive layer that supports the formation of the cathode electrode CE and the second cathode connection line CCE2.

[0165] In this step (S400), the method may include patterning the cathode electrode CE and the second cathode connection line CCE2 in the same process, and integrally forming the cathode electrode CE and the second cathode connection line CCE2 with each other.

[0166] In this step (S400), the deposited conductive layer can form a cathode electrode CE covering the upper surface of the second pixel defining layer PDL2 and the light-emitting portion EL. The deposited conductive layer can also form a second cathode connection line CCE2 covering the dummy dam DUM and the first cathode connection line CCE1. At this time, the second cathode connection line CCE2 can completely cover the dummy dam DUM.

[0167] In this step (S400), the method may include setting a second cathode connection line CCE2 such that the second cathode connection line CCE2 is directly adjacent to the dummy dam DUM. The method may also include setting a cathode electrode CE such that the cathode electrode CE is directly adjacent to the first pixel defining layer PDL1.

[0168] As described in this paper, since the corresponding cross sections of the first pixel limiting layer PDL1 and the dummy dam DUM each have a positive conical shape, the cathode electrode CE and the second cathode connection line CCE2 can properly form a cathode signal path without breaking.

[0169] Subsequently, according to an embodiment, the method may further include forming an encapsulation layer and disposed an upper UL (see embodiment) in association with providing the display device DD according to the embodiment. Figure 2 ).

[0170] Next, refer to Figures 18 to 26 This document describes a method for manufacturing a display device DD according to a second embodiment. Descriptions that may overlap with descriptions of other display devices DD or methods described herein will be brief or will not be repeated.

[0171] Figure 18 This is a flowchart illustrating a method for manufacturing a display device DD according to a second embodiment.

[0172] Figures 19 to 26 This is a schematic cross-sectional view illustrating the various process steps of a method for manufacturing a display device DD according to the second embodiment. For ease of explanation, Figures 19 to 22 Based on the references in this article Figure 7 The described cross-sectional structure is illustrated. For ease of explanation, Figures 23 to 26 Based on the references in this article Figure 8 The described cross-sectional structure is illustrated.

[0173] refer to Figure 18The method of manufacturing a display device DD according to an embodiment may include patterning an anode electrode, a first cathode connection line and a first pixel defining layer (S100), patterning a second pixel defining layer and a dummy dam (S200), forming a light-emitting portion (S300), and forming a cathode electrode and a second cathode connection line (S400), and may further include patterning a connecting pattern layer (S250).

[0174] The method for manufacturing a display device DD according to this embodiment may include performing patterning of the anode electrode, the first cathode connection line, and the first pixel defining layer in substantially the same manner as described herein (S100).

[0175] refer to Figure 18 , Figure 19 and Figure 23 When patterning the second pixel definition layer and the dummy dam (S200), the method may include using a photomask MAS to pattern the second pixel definition layer PDL2 and the dummy dam DUM.

[0176] In this step (S200), the method may include patterning a dummy dam DUM in an area corresponding to the position of the full-tone portion FP. For example, the position of the full-tone portion FP may correspond to the position of the dummy dam DUM. When viewed in a plane, the position of the full-tone portion FP may overlap with the dummy dam DUM. According to an embodiment, since a negative photoresist is used, the photoresist can be retained at the position of the full-tone portion FP, and a dummy dam DUM with an inverted conical cross-section can be provided.

[0177] In this step (S200), a second pixel-defining layer PDL2 with an inverted cone shape can be provided.

[0178] refer to Figure 18 , Figure 20 and Figure 24 When patterning the connection pattern layer (S250), the method may include setting a connection pattern layer COP that covers the dummy dam DUM.

[0179] In this step (S250), the method may include patterning a connecting pattern layer COP having a cross-section with a positive conical shape. The method may include patterning the connecting pattern layer COP such that the connecting pattern layer COP covers the upper and side surfaces of the dummy dam DUM.

[0180] refer to Figure 18 , Figure 21 and Figure 25 When forming the light-emitting portion (S300), the method may include forming the light-emitting portion EL based on an inkjet printing process.

[0181] In the method of manufacturing a display device DD according to this embodiment, the formation of the light-emitting portion (S300) described herein can be performed in substantially the same manner as in other examples of manufacturing a display device DD described herein.

[0182] refer to Figure 18 , Figure 22 and Figure 26 When forming the cathode electrode and the second cathode connection line (S400), the method may include fully depositing a conductive layer that supports the formation of the cathode electrode CE and the second cathode connection line CCE2.

[0183] In this step (S400), the method may include patterning the cathode electrode CE and the second cathode connection line CCE2 in the same process.

[0184] In this step (S400), the deposited conductive layer can form a cathode electrode CE covering the upper surface of the second pixel defining layer PDL2 and the light-emitting portion EL, and the deposited conductive layer can form a second cathode connection line CCE2 covering the dummy dam DUM, the connecting pattern layer COP and the first cathode connection line CCE1.

[0185] As described in this paper, since the corresponding cross sections of the connecting pattern layer COP covering the dummy dam DUM and the first pixel limiting layer PDL1 each have a positive conical shape, the cathode electrode CE and the second cathode connecting line CCE2 can properly form a cathode signal path without breaking.

[0186] Subsequently, according to an embodiment, the method may further include forming an encapsulation layer and disposed an upper UL (see embodiment) in association with providing the display device DD according to the embodiment. Figure 2 ).

[0187] In the following, an electronic device 1000 including a display device DD according to an embodiment will be described.

[0188] Figure 27 This is a schematic block diagram illustrating an electronic device 1000 including a display device according to an embodiment. Figure 28 It is shown in the diagram. Figure 27 A schematic diagram illustrating an example of an electronic device 1000 implemented as a smartphone. Figure 29 It is shown in the diagram. Figure 27 A schematic diagram illustrating an example of an electronic device 1000 implemented as a tablet computer.

[0189] refer to Figures 27 to 29 The electronic device 1000 may include a processor 1010, a memory device 1020, a storage device 1030, an input / output (I / O) device 1040, a power supply 1050, and a display device 1060. The display device 1060 may be... Figure 1 The display device DD. The electronic device 1000 may further include various ports for communicating with a video card, sound card, memory card, USB device, or other systems. In embodiments, such as Figure 28 As illustrated in the diagram, the electronic device 1000 can be implemented as a smartphone. In an embodiment, such as... Figure 29 As illustrated, the electronic device 1000 can be implemented as a tablet computer. However, the above example is illustrative, and the electronic device 1000 is not necessarily limited to the above example. For example, the electronic device 1000 can be implemented as a cellular phone, video phone, smart tablet, smartwatch, vehicle navigation device, computer monitor, laptop computer, or head-mounted display device, etc.

[0190] Processor 1010 can perform specific calculations or tasks. In embodiments, processor 1010 can be a microprocessor, central processing unit, or application processor, etc. Processor 1010 can be connected to other components via address buses, control buses, and data buses, etc. In embodiments, processor 1010 can be connected to an expansion bus such as a peripheral component interconnect (PCI) bus. In embodiments, processor 1010 can provide input image data to display device 1060. Therefore, display device 1060 can display an image based on the input image data provided from processor 1010.

[0191] The memory device 1020 can store data required for performing operations of the electronic device 1000. The memory device 1020 can be used as working memory and / or buffer memory of the processor 1010. For example, the memory device 1020 may include one or more volatile memory devices such as dynamic random access memory (DRAM) devices, static random access memory (SRAM) devices, and mobile DRAM devices.

[0192] Storage device 1030 can store data in response to control signals or data from processor 1010. Storage device 1030 may include one or more non-volatile memories to retain data even when electronic device 1000 is powered off. In some embodiments, storage device 1030 may include a solid-state drive (SSD), hard disk drive (HDD), or CD-ROM, etc.

[0193] I / O device 1040 may include input devices such as a keyboard, keypad, touchpad, touchscreen, and mouse, as well as output devices such as speakers and printers. In an embodiment, display device 1060 may be included in I / O device 1040.

[0194] The power supply 1050 can supply the power required to operate the electronic device 1000. For example, the power supply 1050 can be a power management integrated circuit (PMIC). In an embodiment, the power supply 1050 can supply power to the display device 1060.

[0195] The display device 1060 can display images corresponding to the visual information of the electronic device 1000. The display device 1060 can be connected to other components via a bus or other communication links.

[0196] Although this disclosure has been described with reference to the exemplary embodiments discussed above, those skilled in the art or those with ordinary knowledge in the art will understand that this disclosure can be modified and altered in various ways within the scope of the ideas and techniques of the disclosure described in the claims.

[0197] Therefore, the technical scope of this disclosure should not be limited to the content described in the detailed description of this specification, but should be determined by the scope of the claims.

Claims

1. A display device comprising a display area and a non-display area, the display device comprising: A base layer is disposed across the display area and the non-display area; A light-emitting element is disposed in the display area and on the substrate layer, and includes an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; A first pixel limiting layer and a second pixel limiting layer are disposed in the display area and on the base layer; as well as A dummy dam is constructed within the non-display area, on the base layer, and surrounding at least a portion of the display area. in: The first pixel defining layer extends in a first direction, and the second pixel defining layer extends in a second direction different from the first direction. The light-emitting portion is disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the second pixel-defining layer has an inverted conical shape, and The cross-section of the dummy dam has a conical shape.

2. The display device according to claim 1, wherein, The display device includes: A first pixel and a second pixel are adjacent to each other along the second direction, wherein each of the first pixel and the second pixel includes the light-emitting element. in: Each of the first pixel and the second pixel includes a first sub-pixel region in which light of a first color is provided, a second sub-pixel region in which light of a second color is provided, and a third sub-pixel region in which light of a third color is provided. The first sub-pixel region, the second sub-pixel region, and the third sub-pixel region are adjacent to the second pixel defining layer in the first direction. The first sub-pixel region of the first pixel and the first sub-pixel region of the second pixel are adjacent to each other in the second direction. The second sub-pixel region of the first pixel and the second sub-pixel region of the second pixel are adjacent to each other in the second direction, and The third sub-pixel region of the first pixel and the third sub-pixel region of the second pixel are adjacent to each other in the second direction.

3. The display device according to claim 1, wherein, The virtual dam completely surrounds the display area. The dummy dam and the second pixel defining layer comprise the same material, and The dummy dam, the first pixel limiting layer, and the second pixel limiting layer comprise organic materials.

4. The display device according to claim 1, further comprising: A first cathode connection line is disposed in the non-display area and comprises the same material as the anode electrode; and The second cathode connection wire, made of the same material as the cathode electrode, covers the dummy dam and is electrically connected to the first cathode connection wire. in: The cathode electrode and the second cathode connecting wire are integrally formed. The display area is formed on one side of the dummy dam, and The first cathode connection line is formed on the other side of the dummy dam.

5. The display device according to any one of claims 1 to 4, wherein, The cross-section of the first pixel-defining layer has a positive conical shape.

6. A display device comprising a display area and a non-display area, the display device comprising: A base layer is disposed across the display area and the non-display area; A light-emitting element is disposed in the display area and on the substrate layer, and includes an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; A first pixel limiting layer and a second pixel limiting layer are disposed in the display area and on the base layer; A dummy dam is set in the non-display area, on the base layer, and surrounding at least a portion of the display area; and Connect the pattern layer to cover the side and top surfaces of the dummy dam. in: The first pixel defining layer extends in a first direction, and the second pixel defining layer extends in a second direction different from the first direction. The light-emitting portion is disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the first pixel-defining layer has a positive cone shape. The cross-section of the second pixel-defining layer has an inverted cone shape. The cross-section of the dummy dam has an inverted conical shape, and The cross-section of the connecting pattern layer has a positive conical shape.

7. A method for manufacturing a display device, the method comprising: An anode electrode, a first cathode connection line, and a first pixel defining layer extending in a first direction are patterned on a substrate layer; Patterning a second pixel-defined layer and a dummy dam extending in a second direction different from the first direction; The light-emitting portion is formed in the area surrounded by the second pixel-defining layer using an inkjet printing process; and Forming a cathode electrode and a second cathode connection line. The formation of the cathode electrode and the second cathode connection line includes: The dummy dam is completely covered by the second cathode connection line; and The second cathode connection line and the cathode electrode are integrally formed together.

8. The method according to claim 7, wherein, The patterning of the second pixel-defining layer and the dummy dam includes: performing an exposure process using a photomask comprising a full-tone portion and an intermediate portion. The position of the full-tone portion corresponds to the position of the second pixel-defined layer. The position of the middle section corresponds to the position of the dummy dam, and The execution of the exposure process includes: forming a photoresist layer comprising a negative photoresist.

9. The method according to claim 7, wherein, The cross-section of the dummy dam has a conical shape. The cross-section of the first pixel-defining layer has a positive conical shape, and The cross-section of the second pixel-defining layer has an inverted cone shape.

10. The method according to claim 7, wherein, The patterning of the second pixel defining layer includes: patterning a plurality of second pixel defining layers spaced apart in the first direction, and The formation of the light-emitting portion includes providing ink comprising a material associated with the formation of the light-emitting portion between the plurality of second pixel defining layers.

11. The method according to claim 7, wherein, The formation of the second cathode connection line includes: setting the second cathode connection line such that the second cathode connection line is directly adjacent to the dummy dam, and The formation of the cathode electrode includes: setting the cathode electrode such that the cathode electrode is directly adjacent to the first pixel defining layer.

12. The method according to claim 7, wherein, The patterning of the first cathode connection line and the formation of the cathode electrode and the second cathode connection line include: forming a cathode signal path through the cathode electrode, the first cathode connection line and the second cathode connection line.

13. An electronic device comprising: The processor is configured to provide input image data; A display device is configured to display an image based on the input image; and The power supply is configured to supply power to the display device. in: The display device includes a display area and a non-display area. The display device includes: A base layer is disposed across the display area and the non-display area; A light-emitting element is disposed in the display area and on the substrate layer, and includes an anode electrode, a cathode electrode, and a light-emitting portion electrically connected between the anode electrode and the cathode electrode; A first pixel defining layer and a second pixel defining layer are disposed in the display area and on the base layer; and A dummy dam is constructed within the non-display area, on the base layer, and surrounding at least a portion of the display area. The first pixel defining layer extends in a first direction, and the second pixel defining layer extends in a second direction different from the first direction. The light-emitting portion is disposed in the area surrounded by the first pixel defining layer and the second pixel defining layer. The cross-section of the second pixel-defining layer has an inverted conical shape, and The cross-section of the dummy dam has a conical shape.

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