Display device

Abstract

The present invention relates to a display device, wherein the display device may include a backplane, a light source on the backplane, a quantum dot pattern on the light source, a transparent pattern disposed on the light source and spaced apart from the quantum dot pattern in a first direction parallel to the upper surface of the backplane, and a reflection pattern between the quantum dot pattern and the transparent pattern.

Description

Technology Field

[0001] The present invention relates to a display device including a quantum dot pattern. Background Technology

[0002] As the information society develops, the demand for displays to display information is increasing. Accordingly, various displays such as liquid crystal displays (LCDs), electronic paper (e-paper), organic light-emitting displays (OLEDs), and microdisplays are being developed and utilized.

[0003] Recently, active research is being conducted on quantum dot displays that are solution-processable and possess higher color purity than OLEDs. The problem to be solved

[0004] The technical problem that the present invention aims to solve is to provide a display device having high light efficiency.

[0005] The technical problem that the present invention aims to solve is to provide a display device having high color reproduction capability.

[0006] The technical problem that the present invention aims to solve is to provide a display device having high resolution. means of solving the problem

[0007] A display device according to some embodiments of the present invention may include a backplane, a light source on the backplane, a quantum dot pattern on the light source, a transparent pattern disposed on the light source and spaced apart from the quantum dot pattern in a first direction parallel to the upper surface of the backplane, and a reflection pattern between the quantum dot pattern and the transparent pattern.

[0008] According to some embodiments, the transparent pattern may include at least one of an inorganic thin film, an organic thin film, an organic-inorganic composite thin film, or a combination thereof.

[0009] According to some embodiments, the quantum dot pattern may include quantum dots. The quantum dots may include at least one of a group II-VI compound, a group III-V compound, a group IV-VI compound, a group I-III-VI compound, a group IV element, or a group IV compound, or a combination thereof.

[0010] According to some embodiments, the reflection pattern may include at least one of a metal element, a metal alloy, a transition metal oxide, a metal nitride, or an inorganic thin film, or a combination thereof.

[0011] According to some embodiments, the light source may be a blue light source.

[0012] According to some embodiments, the light source may be a blue-green light source.

[0013] According to some embodiments, the display device may further include a scattering pattern on the transparent pattern and a color filter on the quantum dot pattern.

[0014] According to some embodiments, the scattering pattern may include a scattering agent. The scattering agent may include at least one of titanium oxide (TiO2), zinc oxide (ZnO), tin oxide (SnO), silicon oxide (SiO), nickel oxide (NiO), magnesium oxide (MgO), zirconium oxide (ZrO2), barium titanate (BaTiO3), silicon carbide (SiC), boron nitride (BN), aluminum nitride (AlN), gallium nitride (GaN), zinc sulfide (ZnS), copper chloride (CuCl), strontium titanate (SrTiO3), or lithium niobate (LiNbO3), or a combination thereof.

[0015] According to some embodiments, the display device may further include a blue color filter on the transparent pattern, a green color filter on the transparent pattern, and a red color filter on the quantum dot pattern.

[0016] According to some embodiments, the quantum dot pattern and the transparent pattern may be provided in multiple numbers. The quantum dot pattern and the transparent pattern may be arranged alternately in the first direction.

[0017] According to some embodiments, the width of the upper surface of the transparent pattern in the first direction may be equal to or greater than the width of the lower surface.

[0018] According to some embodiments, the width of the lower surface of the quantum dot pattern in the first direction may be equal to or greater than the width of the upper surface.

[0019] According to some embodiments, the quantum dot pattern may be provided in multiple numbers and may be spaced apart from each other. The quantum dot pattern may be arranged in a zigzag pattern along a diagonal between the first direction and a second direction perpendicular to the first direction.

[0020] A display device according to some embodiments of the present invention may include a backplane and a plurality of pixels on the backplane. Each of the plurality of pixels may include a first subpixel and a second subpixel. The first subpixel may include a quantum dot pattern on the backplane, a reflection pattern surrounding the side of the quantum dot pattern, and a first color filter on the quantum dot pattern. The second subpixel may include a transparent pattern on the backplane. The quantum dot pattern and the transparent pattern may be spaced apart from each other with the reflection pattern in between.

[0021] According to some embodiments, the second subpixel may further include a scattering pattern on the transparent pattern.

[0022] According to some embodiments, the second subpixel may further include a second color filter on the transparent pattern. The colors of the first color filter and the second color filter may be different.

[0023] A display device according to some embodiments of the present invention may include a backplane, a light source on the backplane, a quantum dot pattern on the light source, a transparent pattern disposed on the light source and spaced apart from the quantum dot pattern in a first direction parallel to the upper surface of the backplane, and a reflection pattern between the quantum dot pattern and the transparent pattern. The quantum dot pattern may be provided in a plurality, spaced apart from each other, and arranged in a zigzag pattern diagonally between the first direction and a second direction perpendicular to the first direction. The reflection pattern may be provided in a plurality, spaced apart from each other, and arranged in a zigzag pattern diagonally. The transparent pattern may be provided in a plurality, with their lower surfaces connected to each other, and their upper surfaces arranged in a zigzag pattern diagonally.

[0024] According to some embodiments, the quantum dot pattern and the transparent pattern may be alternately arranged in the first direction and the second direction.

[0025] According to some embodiments, the display device may further include a scattering pattern on the transparent pattern and a color filter on the quantum dot pattern. The quantum dot pattern may include a green quantum dot pattern and a red quantum dot pattern. The color filter may include a green color filter and a red color filter.

[0026] According to some embodiments, the first color filter on the transparent pattern and the second color filter on the quantum dot pattern may be further included. The colors of the first color filter and the second color filter may be different. Effects of the invention

[0027] The display device according to the present invention can exhibit high light efficiency, high color reproduction, and high resolution through a quantum dot pattern, a transparent pattern, and a reflective pattern.

[0028] The method for manufacturing a display device according to the present invention can manufacture a display device exhibiting high light efficiency, high color reproduction power, and high resolution by forming a transparent pattern and then forming a reflective pattern. Brief explanation of the drawing

[0029] Fig. 1 is a plan view of a display device according to some embodiments of the present invention. FIGS. 2a to 2c is a plan view of area A in Fig. 1. Fig. 3 This is a plan view of the pixel in Fig. 1. Fig. 4a is a cross-sectional view along the line AA' in Fig. 3. Fig. 4b is a cross-sectional view along the BB' line in Fig. 3. FIGS. 5a to 5c is a plan view of a pixel that may be included in a display device according to some embodiments of the present invention. Fig. 6 is a plan view of a display device according to some embodiments of the present invention. Fig. 7 Figure 6 is a plan view of the pixel. Fig. 8a Figure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention. Fig. 8b Figure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention. FIGS. 9a to 13b Figure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention. Fig. 14 is a plan view of a display device according to some embodiments of the present invention. FIGS. 15a to 15c is a plan view of area B in Fig. 14. Fig. 16 This is a plan view of the pixel in Fig. 14. Fig. 17a is a cross-sectional view along the line AA' in Fig. 16. Fig. 17b is a cross-sectional view along the BB' line of Fig. 16. FIGS. 18a to 18c is a plan view of a pixel included in a display device according to some embodiments of the present invention. Fig. 19is a plan view of a display device according to some embodiments of the present invention. Fig. 20 This is a plan view of the pixel in Fig. 19. Fig. 21a Figure 14 illustrates a method for manufacturing a display device according to some embodiments of the present invention. Fig. 21b Figure 14 illustrates a method for manufacturing a display device according to some embodiments of the present invention. FIGS. 22a to 26b Figure 14 illustrates a method for manufacturing a display device according to some embodiment of the present invention. Specific details for implementing the invention

[0030] To fully understand the structure and effects of the present invention, preferred embodiments of the present invention are described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various modifications can be made. The description of these embodiments is provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. In the attached drawings, the components are depicted enlarged from their actual size for convenience of explanation, and the proportions of each component may be exaggerated or reduced.

[0031] Throughout the specification, identical reference numbers refer to substantially identical components.

[0032] In the following description, detailed descriptions of configurations and functions known in the technical field of the present invention may be omitted if they are not related to the core configuration of the present invention. The meaning of the terms described in this specification should be understood as follows.

[0033] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings of the present invention are exemplary, and therefore the present invention is not limited to the depicted details.

[0034] Furthermore, in describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0035] Where terms such as 'comprising,' 'having,' 'consisting of,' etc. are used in this specification, other parts may be added unless 'only' is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0036] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0037] In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used.

[0038] In the case of an explanation of a temporal relationship, for example, when the temporal sequence is explained using 'after', 'after', 'following', 'next', 'before', etc., it may include cases where the sequence is not continuous unless 'immediately' or 'directly' is used.

[0039] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of the present invention.

[0040] The term “at least one” should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” may mean not only the first item, the second item, or the third item individually, but also all combinations of items that can be presented from two or more of the first item, the second item, and the third item.

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0044] [Display device]

[0045] Fig. 1 is a plan view of a display device according to some embodiments of the present invention. FIGS. 2a to 2c is a plan view of area A in Fig. 1. Fig. 3 This is a plan view of the pixel in Fig. 1. Fig. 4a is a cross-sectional view along the line AA' in Fig. 3. Fig. 4b is a cross-sectional view along the BB' line in Fig. 3.

[0046] FIGS. 1 to 4b Referring to [the image / document], a display device (1000) according to some embodiments of the present invention may be provided.

[0047] A display device (1000) may include a backplane (100) and a pixel (1a) on the backplane (100).

[0048] The backplane (100) may include silicon and / or glass. The backplane (100) may include transistors. The backplane (100) may extend in a first direction (D1) and a second direction (D2) perpendicular to the first direction (D1). The backplane (100) may control the brightness of a light source to be described later.

[0049] Pixels can be provided on the backplane (100). Fig. 1Referring to the above, a display device (1000) according to some embodiments of the present invention may include a first pixel (1a) as a pixel. The first pixel (1a) is shown as a rectangle but is not limited thereto. The first pixel (1a) may be provided in multiple numbers.

[0050] The first pixel (1a) may include subpixels (11, 12, 13, 14). The subpixels (11, 12, 13) may be provided in multiple numbers on the backplane (100). The subpixels (11, 12, 13, 14) may be rectangular in shape from a planar perspective. Each of the pixels (1) may include four subpixels (11, 12, 13, 14) arranged in a 2x2 grid.

[0051] The first pixel (1a) may include one first subpixel (11), one second subpixel (12), one third subpixel (13), and one fourth subpixel (14). The first subpixel (11) may be a blue subpixel. The second subpixel (12) may be a green subpixel. The third subpixel (13) may be a red subpixel. The fourth subpixel (14) may be a blue subpixel and may have substantially the same configuration as the first subpixel (11). The fourth subpixel (14) may share a driving circuit with the first subpixel (11).

[0052] The first subpixel (11) may be adjacent to both the second subpixel (12) and the third subpixel (13). The fourth subpixel (14) may be adjacent to both the second subpixel (12) and the third subpixel (13). That is, the first subpixel (11) and the fourth subpixel (14) may be arranged diagonally from each other between the first direction (D1) and the second direction (D2). The arrangement of the subpixels (11, 12, 13, 14) in the first pixel (1a) is Fig. 3 It is not limited to, and other embodiments will be described later.

[0053] Fig. 3 Referring to the first subpixel (11), from a planar perspective, the first subpixel (11) may have a first length (L1) in the first direction (D1) and a second length (L2) in the second direction (D2). The second subpixel (12) may have a third length (L3) in the first direction (D1) and a second length (L2) in the second direction (D2). The third subpixel (13) may have a first length (L1) in the first direction (D1) and a fourth length (L4) in the second direction (D2). The fourth subpixel (14) may have a third length (L3) in the first direction (D1) and a fourth length (L4) in the second direction (D2).

[0054] A center point, which is the point of contact of the boundary lines of each subpixel (11, 12, 13, 14), may be provided within the first pixel (1a). For example, in the case of the first pixel (1a), the center point may be provided at the same as its center or at the lower right of it. That is, for example, the first length (L1) may be equal to or greater than the third length (L3), and the second length (L2) may be equal to or greater than the fourth length (L4). The pixels that the display device (1000) may include Fig. 3 It is not limited to the first pixel (1a) of, and other embodiments will be described later.

[0056] The first subpixel (11) and the fourth subpixel (14) may each include a lower electrode (210), an insulating pattern (220), a first light source (310), an upper electrode (230), an intermediate layer (410), a transparent pattern (510), and a scattering pattern (610).

[0057] The second subpixel (12) may include a lower electrode (210), an insulating pattern (220), a first light source (310), an upper electrode (230), an intermediate layer (410), a first quantum dot pattern (520), a reflection pattern (540), and a first color filter (620).

[0058] The third subpixel (13) may include a lower electrode (210), an insulating pattern (220), a first light source (310), an upper electrode (230), an intermediate layer (410), a second quantum dot pattern (530), a reflection pattern (540), and a second color filter (630).

[0060] A lower electrode (210) may be provided on the backplane (100). Within the first pixel (1a), a plurality of lower electrodes (210) may be provided. Each of the subpixels (11, 12, 13, 14) may include one lower electrode (210). The lower electrode (210) may serve to reflect light from the first light source (310) upward. The lower electrode (210) may be, for example, an anode.

[0061] The lower electrode (210) may include an electrode material. The electrode material may include a metal, for example, silver (Ag), aluminum (Al), molybdenum (Mo), cobalt (Co), copper (Cu), gold (Au), platinum (Pt), tungsten (W), chromium (Cr), magnesium (Mg), or lithium (Li), or at least one of a combination thereof.

[0062] The lower electrode (210) may further include a transparent conductive material. If the lower electrode (210) further includes a transparent conductive material, its charge injection characteristics and light efficiency can be improved. The transparent conductive material may include at least one of a transition metal oxide, a metal nitride, an indium tin oxide, or an aluminum-doped zinc oxide, or a combination thereof.

[0063] Transition metal oxides may include, for example, molybdenum oxide (MoO), vanadium oxide (VO), tungsten oxide (WO), nickel oxide (NiO), or rhenium oxide (ReO), or at least one combination thereof. Metal nitrides may include, for example, titanium nitride (TiN).

[0064] The lower electrode (210) may further comprise at least one of a conductive polymer, copper iodide, copper thiocyanate, or a graphene thin film, or a combination thereof. The conductive polymer may comprise at least one of polypyrrole, polyaniline, polythiophene, or poly-sodium allyloxy hydroxypropyl sulfonate, or a combination thereof.

[0066] An insulating pattern (220) may be provided on the backplane (100). The insulating pattern (220) may cover the sides of the lower electrodes (210). The insulating pattern (220) may cover a portion of the upper surface of the lower electrodes (210). The insulating pattern (220) may be interposed between the lower electrodes (210).

[0067] The insulating pattern (220) may include at least one of an inorganic thin film, an organic thin film, an organic-inorganic composite thin film, or a combination thereof. In a third direction (D3) perpendicular to both the first direction (D1) and the second direction (D2), the thickness of the insulating pattern (220) may be 10 nm to 3,000 nm. When the insulating pattern (220) is an inorganic thin film, the thickness of the insulating pattern (220) in the third direction (D3) may be 10 nm to 500 nm. When the insulating pattern (220) is an organic thin film or an organic-inorganic composite thin film, the thickness of the insulating pattern (220) in the third direction (D3) may be 100 nm to 3,000 nm.

[0068] The inorganic thin film may comprise, for example, at least one of silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), aluminum oxide (AlO), or hafnium oxide (HfO), or a combination thereof, but is not limited thereto. The organic thin film may include, for example, at least one of polyvinyl chloride (PVC) resin, vinyl acetate (VA) resin, polystyrene (PS) resin, polyamide (PA) resin, polyimide (PI) resin, methacrylic acid (MAA) resin, melamine resin, polyurethane (PU) resin, polyethylene resin, ethylene vinyl copolymer resin, polypropylene (PP) resin, polyester resin, acrylic resin, nylon, polycarbonate (PC) resin, or cellulose, or a combination thereof, but is not limited thereto. Organic-inorganic composite thin films may include, for example, at least one of hexamethyldisiloxane, polysilazane, polysiloxane, or polysilsesquioxane, or a combination thereof, but are not limited thereto.

[0070] A first light source (310) may be provided on the lower electrode (210). An upper electrode (230) may be provided on the first light source (310). The first light source (310) may be a blue light source.

[0071] The first light source (310) may include, for example, a hole injection layer, a hole transport layer, a color emitting layer, an electron transport layer, and an electron injection layer. The color emitting layer may be, for example, a blue emitting layer. The first light source (310) may further include a charge generation layer. The lower electrode (210), the first light source (310), and the upper electrode (230) may form a color organic light-emitting diode (OLED), for example, a blue organic light-emitting diode. The upper electrode (230) may serve to transmit light emitted from the first light source (310).

[0072] The electrode material may include a metal, for example, silver (Ag), aluminum (Al), molybdenum (Mo), cobalt (Co), copper (Cu), gold (Au), platinum (Pt), tungsten (W), chromium (Cr), magnesium (Mg), or lithium (Li), or at least one of a combination thereof. The upper electrode (230) may include an electrode material. The upper electrode (230) may be a negative electrode, for example.

[0073] The upper electrode (230) may further include a transparent conductive material. If the upper electrode (230) further includes a transparent conductive material, its charge injection characteristics and light efficiency can be improved. The transparent conductive material may include at least one of a transition metal oxide, a metal nitride, an indium tin oxide, or an aluminum-doped zinc oxide, or a combination thereof.

[0074] Transition metal oxides may include one or more from the group consisting of, for example, molybdenum oxide (MoO), vanadium oxide (VO), tungsten oxide (WO), nickel oxide (NiO), or rhenium oxide (ReO), or combinations thereof. Metal nitrides may include, for example, titanium nitride (TiN).

[0075] The upper electrode (230) may further comprise at least one of a conductive polymer, copper iodide, copper thiocyanate, or a graphene thin film, or a combination thereof. The conductive polymer may comprise at least one of polypyrrole, polyaniline, polythiophene, or poly-sodium allyloxy hydroxypropyl sulfonate, or a combination thereof.

[0077] An intermediate layer (410) may be provided on the upper electrode (230). The intermediate layer (410) may comprise at least one of an inorganic thin film, an organic thin film, an organic-inorganic composite thin film, or a combination thereof. The intermediate layer (410) may comprise a single-layer structure or a multi-layer structure. The inorganic thin film may comprise, for example, at least one of silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), aluminum oxide (AlO), or hafnium oxide (HfO), or a combination thereof, but is not limited thereto. The organic thin film may include, for example, at least one of polyvinyl chloride (PVC) resin, vinyl acetate (VA) resin, polystyrene (PS) resin, polyamide (PA) resin, polyimide (PI) resin, methacrylic acid (MAA) resin, melamine resin, polyurethane (PU) resin, polyethylene resin, ethylene vinyl copolymer resin, polypropylene (PP) resin, polyester resin, acrylic resin, nylon, polycarbonate (PC) resin, or cellulose, or a combination thereof, but is not limited thereto. Organic-inorganic composite thin films may include, for example, at least one of hexamethyldisiloxane, polysilazane, polysiloxane, or polysilsesquioxane, or a combination thereof, but are not limited thereto.

[0079] A transparent pattern (510) may be provided on the intermediate layer (410). Specifically, a transparent pattern (510) may be provided on the intermediate layer (410) of the first subpixel (11) and the fourth subpixel (14).

[0080] The transparent pattern (510) may be provided in multiple numbers, and each of the multiple transparent patterns (510) may be in contact with or connected to one another. In a planar view, the transparent patterns (510) may be arranged in a zigzag pattern diagonally between the first direction (D1) and the second direction (D2). The width of the lower surface (510L) of the transparent pattern (510) in the first direction (D1) or the second direction (D2) may be equal to or greater than the width of the upper surface (510U). The thickness of the transparent pattern (510) in the third direction (D3) may be 1 μm to 20 μm.

[0081] The transparent pattern (510) can be transparent. Accordingly, the transparent pattern (510) can emit light of a specific wavelength emitted from the first light source (310) as is.

[0082] The transparent pattern (510) may include at least one of an inorganic thin film, an organic thin film, an organic-inorganic composite thin film, or a combination thereof. The transparent pattern (510) may include a single-layer structure or a multi-layer structure. The inorganic thin film may include, for example, at least one of silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), aluminum oxide (AlO), or hafnium oxide (HfO), or a combination thereof, but is not limited thereto. The organic thin film may include, for example, at least one of polyvinyl chloride (PVC) resin, vinyl acetate (VA) resin, polystyrene (PS) resin, polyamide (PA) resin, polyimide (PI) resin, methacrylic acid (MAA) resin, melamine resin, polyurethane (PU) resin, polyethylene resin, ethylene vinyl copolymer resin, polypropylene (PP) resin, polyester resin, acrylic resin, nylon, polycarbonate (PC) resin, or cellulose, or a combination thereof, but is not limited thereto. Organic-inorganic composite thin films may include, for example, at least one of hexamethyldisiloxane, polysilazane, polysiloxane, or polysilsesquioxane, or a combination thereof, but are not limited thereto.

[0084] Quantum dot patterns (520, 530) may be provided on the intermediate layer (410). Quantum dot patterns (520, 530) may be provided in multiple numbers and may be spaced apart from each other. Specifically, a first quantum dot pattern (520) may be provided within a second subpixel (12), and a second quantum dot pattern (530) may be provided within a third subpixel (13). The first quantum dot pattern (520) may be a green quantum dot pattern. The second quantum dot pattern (530) may be a red quantum dot pattern.

[0085] Each of the quantum dot patterns (520, 530) may be spaced apart from the transparent patterns (510) in a first direction (D1) or a second direction (D2). In a planar view, the quantum dot patterns (520, 530) may be alternately arranged with the transparent pattern (510) in a first direction (D1) or a second direction (D2). In a planar view, the first quantum dot pattern (520) and the second quantum dot pattern (530) may be arranged in a zigzag pattern diagonally between the first direction (D1) and the second direction (D2). The width of the upper surface (520U, 530U) of the quantum dot pattern (520, 530) in the first direction (D1) or the second direction (D2) may be equal to or greater than the width of the lower surface (520L, 530L).

[0086] Each of the first and second quantum dot patterns (520, 530) may include a quantum dot. The quantum dot included in the first quantum dot pattern (520) may convert the wavelength of light emitted from the first light source (310) into a wavelength of green light. The quantum dot included in the second quantum dot pattern (530) may convert the wavelength of light emitted from the first light source (310) into a wavelength of red light. The color to which the quantum dot converts the wavelength of light emitted from the first light source (310) may vary depending on the size of the quantum dot.

[0087] Quantum dots may include at least one of group II-VI compounds, group III-V compounds, group IV-VI compounds, group I-III-VI compounds, group IV elements, or group IV compounds, or a combination thereof.

[0088] Group II-VI compounds may include at least one of Group II-VI binary compounds, Group II-VI ternary compounds, or Group II-VI quaternary compounds, or a combination thereof. Group II-VI binary compounds may include at least one of CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, MgSe, or a combination thereof. Group II-VI ternary compounds may include at least one of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, or a combination thereof. Group II-VI quaternary compounds may include at least one of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, or HgZnSTe, or a combination thereof.

[0089] Group III-V compounds may include at least one of Group III-V binary compounds, Group III-V ternary compounds, or Group III-V quaternary compounds, or a combination thereof. Group III-V binary compounds may include at least one of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, or InSb, or a combination thereof. Group III-V ternary compounds may include at least one of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, or GaAlNP, or a combination thereof. Group III-V four-element compounds may include at least one of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb, or a combination thereof.

[0090] Group IV-VI compounds may include at least one of Group IV-VI binary compounds, Group IV-VI ternary compounds, or Group IV-VI four-element compounds, or a combination thereof. Group IV-VI binary compounds may include at least one of SnS, SnSe, SnTe, PbS, PbSe, or PbTe, or a combination thereof. Group IV-VI ternary compounds may include at least one of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, or SnPbTe, or a combination thereof. Group IV-VI four-element compounds may include at least one of SnPbSSe, SnPbSeTe, or SnPbSTe, or a combination thereof.

[0091] Group I-III-VI compounds may include at least one of Group I-III-VI ternary compounds, Group I-III-VI quaternary compounds, or combinations thereof. Group I-III-VI ternary compounds may include at least one of AgInS, AgInSe, AgInTe, CuInS, CuInSe, or CuInTe, or combinations thereof. Group I-III-VI quaternary compounds may include at least one of AgInSeS, AgInSeTe, AgInGaS, AgInGaSe, CuInSeS, CuInSeTe, CuInGaS, or CuInGaSe, or combinations thereof.

[0092] Group IV elements may include at least one of C, Si, or Ge, or a combination thereof. Group IV compounds may include at least one of SiC, or SiGe, or a combination thereof.

[0093] The quantum dot may include a core, and the core may include at least one of the aforementioned compounds, namely, group II-VI compounds, group III-V compounds, group IV-VI compounds, group I-III-VI compounds, group IV elements, or group IV compounds, or combinations thereof. The quantum dot may further include a shell, as an example.

[0095] A reflection pattern (540) may be provided on the intermediate layer (410). The reflection pattern (540) may be interposed between the transparent pattern (510) and the quantum dot patterns (520, 530). The reflection pattern (540) may cover the side of the transparent pattern (510). The reflection pattern (540) may cover the side of the quantum dot patterns (520, 530).

[0096] The reflection pattern (540) may include at least one of a metal element, a metal alloy, a transition metal oxide, a metal nitride, or an inorganic thin film, or a combination thereof. The metal element may include, for example, Ag, Al, Mo, Co, W, Ti, Cu, Ta, Ni, Pt, Nb, Cr, Mg, Li, Sc, Ce, Gd, Sm, V, or Fe, or at least one combination thereof. The metal alloy may include, for example, Al / Cr, Al / Co, Al / Cu, Al / Mg, Al / Ni, Al / Sc, Al / Si / Cu, Al / Si, Al / Ti, Al / Ce, Ce / Gd, Ce / Sm, Co / Ni / Cr, Cu / Ge, Cu / In, Cu / Zn, Fe / Mn, Mn / Cu, Mn / Ni, Ni / Cr / Al, Si / Cr / Si, Ni / Zr, Sc / Al, Sn / Zn, Ti / Al / V, or Zn / Sn, or at least one combination thereof. The transition metal oxide may include, for example, molybdenum oxide (MoOx), vanadium oxide (VOx), tungsten oxide (WOx), nickel oxide (NiOx), or rhenium oxide (ReOx), or at least one combination thereof. The metal nitride may include, for example, titanium nitride (TiN). The inorganic thin film may comprise, for example, silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), aluminum oxide (AlOx), hafnium oxide (HfOx), or hexamethyldisiloxane, or at least one of a combination thereof.

[0098] A scattering pattern (610) may be provided on a transparent pattern (510). Within the first pixel (1a), a plurality of scattering patterns (610) may be provided. Specifically, scattering patterns (610) may be provided on the transparent patterns (510) of the first subpixel (11) and the fourth subpixel (14). That is, the scattering patterns (610) may be arranged in a zigzag pattern in a diagonal direction between the first direction (D1) and the second direction (D2).

[0099] The scattering pattern (610) may include a scattering agent. The scattering agent may include at least one of titanium oxide (TiO2), zinc oxide (ZnO), tin oxide (SnOx), silicon oxide (SiOx), nickel oxide (NiO), magnesium oxide (MgO), zirconium oxide (ZrO2), barium titanate (BaTiO3), silicon carbide (SiC), boron nitride (BN), aluminum nitride (AlN), gallium nitride (GaN), zinc sulfide (ZnS), copper chloride (CuCl), strontium titanate (SrTiO3), or lithium niobate (LiNbO3), or a combination thereof. The scattering agent may include particles of the aforementioned compounds, the diameter of which may be 10 nm to 700 nm, or 100 nm to 300 nm. The scattering pattern (610) can change the distribution of backlight emitted from the first light source (310) and ultimately increase the light extraction efficiency, thereby improving the brightness of the display device (1000).

[0101] A color filter (620, 630) may be provided on the quantum dot pattern (520, 530). Specifically, a first color filter (620) may be provided on the first quantum dot pattern (520) of the second subpixel (12), and a second color filter (630) may be provided on the second quantum dot pattern (530) of the third subpixel (13). The first color filter (620) may be a green color filter. That is, the first color filter (620) may selectively transmit green light. The second color filter (630) may be a red color filter. That is, the second color filter (630) may selectively transmit red light. The first color filter (620) and the second color filter (630) can improve the color reproduction rate of the display device (1000) by absorbing unintended light that was not absorbed by the first quantum dot pattern (520) and the second quantum dot pattern (530).

[0103] Hereinafter, other configurations of pixels that may be included in a display device (1000) according to some embodiments of the present invention will be described.

[0104] FIGS. 5a to 5c is a plan view of a pixel that may be included in a display device according to some embodiments of the present invention.

[0105] Fig. 5a The first pixel (1a) of Figures 1 and 3 It includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included in the first pixel (1a), but the second length (L2) may be smaller than the fourth length (L4).

[0106] Fig. 5b The first pixel (1a) of Figures 1 and 3 It includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included in the first pixel (1a), but the first length (L1) may be smaller than the third length (L3).

[0107] Fig. 5c The first pixel (1a) of Figures 1 and 3 The first pixel (1a) includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included therein, but the first length (L1) may be smaller than the third length (L3), and the second length (L2) may be smaller than the fourth length (L4).

[0109] The center point may vary depending on the luminescence efficiency of the first light source (310) and the luminescence efficiency of the quantum dot pattern (520). The relationship between the first length (L1) and the third length (L3) and the relationship between the second length (L2) and the fourth length (L4) may be independent.

[0111] The display device (1000) according to the present invention can have a high color reproduction rate by preventing light mixing through a reflection pattern (540) interposed between a transparent pattern (510) and quantum dot patterns (520, 530). A color filter (620, 630) is provided on the quantum dot patterns (520, 530) to contribute to a high color reproduction rate. A plurality of transparent patterns (510) are provided in a zigzag pattern diagonally between a first direction (D1) and a second direction (D2) to increase process convenience. In addition, high light efficiency can be achieved by adjusting the lengths (L1, L2, L3, L4) of the subpixels (11, 12, 13, 14) in the first direction (D1) and / or the second direction (D2) according to the light emission efficiency of the first light source (310) and the light conversion efficiency of the quantum dot pattern (520, 530).

[0113] Fig. 6 is a plan view of a display device according to some embodiments of the present invention. Fig. 7 Figure 6 is a plan view of the pixel.

[0114] Figures 6 and 7 Referring to the above, a display device (1100) according to some embodiments of the present invention may be provided. The display device (1100) may include a plurality of second pixels (1b).

[0115] The subpixels (11, 12, 13, 14) included in the second pixel (1b) may be identical to the first pixel (1a). In the second pixel (1b), the arrangement of the subpixels may be different from that of the first pixel (1a). Fig. 7 Referring to the first subpixel (11) and the second subpixel (12), the first subpixel (11) and the third subpixel (13) may be adjacent in the second direction (D2), and the first subpixel (11) and the third subpixel (13) may be adjacent in the first direction (D1).

[0117] [Method for manufacturing a display device]

[0118] Hereinafter, a method for manufacturing a display device according to some embodiments of the present invention will be described.

[0119] Fig. 8a Figure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention.

[0120] A method for manufacturing display devices (1000) according to some embodiments of the present invention comprises forming a backplane (100) (S11), forming a first light source (310) on the backplane (100) (S12), forming a barrier layer (not shown) on the first light source (310) (S13), etching at least a portion of the barrier layer (not shown) to form a transparent pattern (510) (S14), forming a first trench (T1) by forming the transparent pattern (510) and forming a reflection pattern (540) surrounding the side of the transparent pattern (510) (S15), forming a second trench (T2) by forming the reflection pattern (540) and filling the second trench (T2) with a quantum dot material to form a quantum dot pattern (520, 530) (S16), and forming a scattering pattern (610) on the transparent pattern (510) (S17). It may include forming a color filter (620, 630) on the quantum dot pattern (520, 530) (S18).

[0122] Fig. 8b Figure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention.

[0123] Fig. 8b cast Fig. 8a With reference to the above, forming a scattering pattern (610) on a transparent pattern (510) (S17) and forming a color filter (620, 630) on a quantum dot pattern (520, 530) (S18) can be performed regardless of the temporal sequence. That is. Fig. 6a After forming a scattering pattern (610) as shown above, a color filter (620, 630) may also be formed. Fig. 6b After forming color filters (620, 630) as shown above, a scattering pattern (610) can be formed.

[0125] FIGS. 9a to 13bFigure 1 illustrates a method for manufacturing a display device according to some embodiments of the present invention.

[0126] Figs. 9a and 9b Referring to [the image], a backplane (100) can be formed. The backplane (100) can be formed through a CMOS (Complementary Metal Oxide Semiconductor) process and / or a TFT (Thin Film Transistor) process.

[0127] A lower electrode (210) may be formed on a backplane (100). The lower electrode (210) may be formed by a sputtering process, a thermal deposition process, a chemical vapor deposition (CVD) process, an atomic layer deposition (ALD) process, a spin coating process, a bar coating process, a blade coating process, plating, a slit coating process, a slot die coating process, and / or a printing process.

[0128] An insulating pattern (220) may be formed on the backplane (100). The insulating pattern (220) may be interposed between the lower electrodes (210). Forming the insulating pattern (220) may, for example, include forming an insulating layer (not shown) and optionally etching the insulating layer (not shown).

[0129] A first light source (310) may be formed on the lower electrode (210). Forming the first light source (310) may include forming a hole injection layer, a hole transport layer, a color emitting layer, an electron transport layer, and an electron injection layer in sequence. The first light source (310) may be formed, for example, through a thermal deposition process.

[0130] An upper electrode (230) may be formed on the first light source (310). The upper electrode (230) may be formed by a sputtering process, a thermal deposition process, a chemical vapor deposition (CVD) process, an atomic layer deposition (ALD) process, a spin coating process, a bar coating process, a blade coating process, plating, a slit coating process, a slot die coating process, and / or a printing process.

[0131] An intermediate layer (410) may be formed on the upper electrode (230). Forming the intermediate layer (410) may include depositing one or more materials from the group consisting of the inorganic thin film, organic thin film, and organic-inorganic composite thin film described above.

[0133] FIGS. 10a and FIGS. 10b Referring to the above, a partition layer (511) may be formed on the intermediate layer (410). The partition layer (511) may cover the upper surface of the intermediate layer (410). Forming the partition layer (511) may include depositing one or more materials from the group consisting of the inorganic thin film, organic thin film, and organic-inorganic composite thin film described above.

[0135] FIGS. 11a and FIGS. 11b Referring to the above, at least a portion of the partition layer (511) can be removed to form a transparent pattern (510).

[0136] A plurality of transparent patterns (510) may be provided. A first trench (T1) may be formed between the transparent patterns (510). The first trench (T1) may expose the upper surface of the intermediate layer (410). As it approaches the backplane (100), the width of the first trench (T1) in the first direction (D1) or the second direction (D2) may be constant or narrow.

[0137] Removing at least a portion of the partition layer (511) may, for example, include etching a portion of the partition layer (511) and / or developing a portion of the partition layer (511).

[0139] FIGS. 12a and FIGS. 12b Referring to the above, a reflective pattern (540) may be formed on the side of the transparent pattern (510). The reflective pattern (540) may cover the side of the transparent pattern (510).

[0140] A second trench (T2) may be formed by the formation of a reflection pattern (540). The second trench (T2) may expose the upper surface of the intermediate layer (410). The second trench (T2) may be interposed between mutually spaced transparent patterns (510) and between mutually spaced reflection patterns (540). The width of the second trench (T2) may be equal to or smaller than the width of the first trench (T1). As it approaches the backplane (100), the width of the second trench (T2) in the first direction (D1) or the second direction (D2) may be constant or narrow.

[0142] Forming a reflection pattern (540) may, for example, include forming a reflection layer (not shown) on the upper surface of a transparent pattern (510), the side of a transparent pattern (510), and the upper surface of an intermediate layer (410), and etching the reflection layer (not shown) formed on the upper surface of the transparent pattern (510) and the upper surface of the intermediate layer (410).

[0144] FIGS. 13a and FIGS. 13b Referring to the first quantum dot pattern (520), a first quantum dot pattern (520) may be formed on the intermediate layer (410) of the second subpixel (12). A second quantum dot pattern (530) may be formed on the intermediate layer (410) of the third subpixel (13). The formation of the first quantum dot pattern (520) and the formation of the second quantum dot pattern (530) may be formed regardless of the temporal sequence.

[0145] Forming the first quantum dot pattern (520) may, for example, include optionally filling the second trench (T2) of the second subpixel (12) with a quantum dot material. Optionally filling the second trench (T2) of the second subpixel (12) with a quantum dot material may, for example, be performed through a photolithography process. Forming the second quantum dot pattern (530) may, for example, include optionally filling the second trench (T2) of the third subpixel (13) with a quantum dot material. Optionally filling the second trench (T2) of the third subpixel (13) with a quantum dot material may, for example, be performed through a photolithography process.

[0146] Quantum dot materials may include quantum dots. The description of quantum dots is the same as previously stated.

[0148] again Figures 4a and 4b Referring to the above, a scattering pattern (610) may be formed on a transparent pattern (510). A first color filter (620) may be formed on a first quantum dot pattern (520). A second color filter (630) may be formed on a second quantum dot pattern (530). The scattering pattern (610), the first color filter (620), and the second color filter (630) may be formed regardless of the temporal sequence.

[0149] Forming a scattering pattern (610) may, for example, include optionally depositing a scattering pattern (610) on a transparent pattern (510). Forming a first color filter (620) may, for example, include optionally depositing a first color filter (620) on a first quantum dot pattern (520). Forming a second color filter (630) may, for example, include optionally depositing a second color filter (630) on a second quantum dot pattern (530). Forming the scattering pattern (610), forming the first color filter (620), and forming the second color filter (630) may, for example, be performed through a photolithography process.

[0151] The method for manufacturing a display device (1000, 1100) according to the present invention can have a high color reproduction rate by preventing light mixing by forming transparent patterns (510) arranged in a zigzag pattern in a diagonal direction between a first direction (D1) and a second direction (D2), and then forming a reflective pattern (540).

[0153] [Display device]

[0154] Hereinafter, a display device according to other embodiments of the present invention will be described.

[0155] Fig. 14 is a plan view of a display device according to some embodiments of the present invention. FIGS. 15a to 15c is a plan view of area B in Fig. 14. Fig. 16 This is a plan view of the pixel in Fig. 14. Fig. 17a is a cross-sectional view along the line AA' in Fig. 16. Fig. 17b is a cross-sectional view along the BB' line of Fig. 16.

[0157] FIGS. 14 to 17b Referring to [the image / document], a display device (2000) according to some embodiments of the present invention may be provided.

[0158] A display device (2000) may include a backplane (100) and a pixel (2a) on the backplane (100).

[0159] Pixels can be provided on the backplane (100). Fig. 14 Referring to the, a display device (2000) according to some embodiment of the present invention may include a third pixel (2a) as a pixel. The third pixel (2a) may include four subpixels (11, 12, 13, 14) arranged in a 2x2 grid.

[0160] The third pixel (2a) may include one fifth subpixel (21), one sixth subpixel (22), one seventh subpixel (23), and one eighth subpixel (24). The fifth subpixel (21) may be a red subpixel. The sixth subpixel (22) may be a green subpixel. The seventh subpixel (23) may be a blue subpixel. The eighth subpixel (24) may be a red subpixel and may have substantially the same configuration as the fifth subpixel (21). The eighth subpixel (24) may share a driving circuit with the fifth subpixel (21).

[0161] The fifth subpixel (21) may be adjacent to both the sixth subpixel (22) and the seventh subpixel (23). The eighth subpixel (24) may be adjacent to both the sixth subpixel (22) and the seventh subpixel (23). That is, the fifth subpixel (21) and the eighth subpixel (24) may be arranged diagonally from each other between the first direction (D1) and the second direction (D2). The arrangement of the subpixels (21, 22, 23, 24) in the third pixel (2a) is Fig. 16 It is not limited to, and other embodiments will be described later.

[0162] From a planar perspective, the fifth subpixel (21) may have a fifth length (L5) in the first direction (D1) and a sixth length (L6) in the second direction (D2). The sixth subpixel (22) may have a seventh length (L7) in the first direction (D1) and a sixth length (L6) in the second direction (D2). The seventh subpixel (23) may have a fifth length (L5) in the first direction (D1) and an eighth length (L8) in the second direction (D2). The eighth subpixel (24) may have a seventh length (L7) in the first direction (D1) and an eighth length (L8) in the second direction (D2).

[0163] A center point, which is the point of contact of the boundary lines of each subpixel (21, 22, 23, 24), may be provided within the third pixel (2a). For example, in the case of the third pixel (1a), the center point may be provided at the same center as or at the lower right of it. That is, for example, the fifth length (L5) may be equal to or greater than the seventh length (L7), and the sixth length (L6) may be equal to or greater than the eighth length (L8). The pixels that the display device (2000) may include Fig. 16 It is not limited to the third pixel (2a) of, and other embodiments will be described later.

[0165] The fifth subpixel (21) and the eighth subpixel (24) may include a lower electrode (210), an insulating pattern (220), a second light source (320), an upper electrode (230), an intermediate layer (410), a second quantum dot pattern (530), a reflection pattern (540), and a second color filter (630).

[0166] The sixth subpixel (22) may include a lower electrode (210), an insulating pattern (220), a second light source (320), an upper electrode (230), an intermediate layer (410), a transparent pattern (510), a reflective pattern (540), and a first color filter (620).

[0167] The seventh subpixel (23) may include a lower electrode (210), an insulating pattern (220), a second light source (320), an upper electrode (230), an intermediate layer (410), a transparent pattern (510), a reflective pattern (540), and a third color filter (640).

[0169] A backplane (100) may be provided, and a lower electrode (210) and an insulating pattern (220) may be provided on the backplane (100).

[0170] A second light source (320) may be provided on the lower electrode (210). An upper electrode (230) may be provided on the second light source (320). The second light source (320) may be a blue-green light source.

[0171] The light source (320) may include, for example, a hole injection layer, a hole transport layer, a color emitting layer, an electron transport layer, and an electron injection layer. The color emitting layer may be, for example, a blue and green emitting layer. The light source (320) may further include a charge generation layer. The lower electrode (210), the light source (320), and the upper electrode (230) may form a color organic light-emitting diode (OLED), for example, a blue and green organic light-emitting diode.

[0172] An intermediate layer (410) may be provided on the upper electrode (230). A transparent pattern (510) may be provided on the intermediate layer (410). Specifically, a transparent pattern (510) may be provided on the intermediate layer (410) of the sixth sub-pixel (22) and the seventh sub-pixel (23). A plurality of transparent patterns (510) may be provided, and each of the plurality of transparent patterns (510) may be in contact with or connected to one another. From a planar perspective, the transparent patterns (510) may be arranged in a zigzag pattern in a diagonal direction between the first direction (D1) and the second direction (D2).

[0173] Quantum dot patterns (530) may be provided on the intermediate layer (410). Quantum dot patterns (530) may be provided in multiple numbers and may be spaced apart from each other. Specifically, a second quantum dot pattern (530) may be provided within the fifth and eighth subpixels (21, 24), and the second quantum dot pattern (530) may be a red quantum dot pattern. The quantum dots included in the second quantum dot pattern (530) can convert the wavelength of light emitted from the second light source (320) into the wavelength of red light. Each of the quantum dot patterns (530) may be spaced apart from the transparent patterns (510) in a first direction (D1) or a second direction (D2). In a planar view, the quantum dot patterns (530) may be arranged in a zigzag pattern diagonally opposite each other.

[0174] A reflection pattern (540) may be provided on the intermediate layer (410). The reflection pattern (540) may be interposed between the transparent pattern (510) and the quantum dot pattern (530). The reflection pattern (540) may cover the side of the transparent pattern (510). The reflection pattern (540) may cover the side of the quantum dot pattern (530).

[0176] Color filters (620, 640) may be provided on the transparent pattern (510). Specifically, a first color filter (620) may be provided on the transparent pattern (510) of the sixth subpixel (22), and a third color filter (640) may be provided on the transparent pattern (510) of the seventh subpixel (23). The first color filter (620) may be a green color filter, and the third color filter (640) may be a blue color filter. That is, the first color filter (620) can absorb blue light from the blue-green light emitted from the second light source (320) and selectively transmit green light. The third color filter (640) can absorb green light from the blue-green light emitted from the second light source (320) and selectively transmit blue light.

[0178] A color filter (630) may be provided on the quantum dot pattern (530). Specifically, a second color filter (630) may be provided on the second quantum dot pattern (530), and the second color filter (630) may be a red color filter. That is, the second color filter (630) can selectively transmit red light. The color reproduction rate of the display device (2000) may be improved by the second color filter (630) absorbing unintended light that was not absorbed by the second quantum dot pattern (530).

[0180] The display device (2000) according to the present invention can have a high color reproduction rate by preventing light mixing through a reflection pattern (540) interposed between a transparent pattern (510) and a quantum dot pattern (530). A color filter (630) is provided on the quantum dot pattern (530) to contribute to a high color reproduction rate. A plurality of transparent patterns (510) are provided diagonally between a first direction (D1) and a second direction (D2) to increase process convenience. In addition, high light efficiency can be achieved by adjusting the length (L5, L6, L7, L8) of the subpixels (21, 22, 23, 24) in the first direction (D1) and / or the second direction (D2) according to the light emission efficiency of the light source (320) and the light conversion efficiency of the quantum dot pattern (530).

[0182] Hereinafter, other configurations of pixels that may be included in a display device (2000) according to some embodiments of the present invention will be described.

[0183] FIGS. 18a to 18c is a plan view of a pixel included in a display device according to some embodiments of the present invention.

[0184] Fig. 18a The third pixel (2a) of FIGS. 14 and FIGS. 16 The third pixel (2a) includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included therein, but the sixth length (L6) may be smaller than the eighth length (L8).

[0185] Fig. 18b The third pixel (2a) of FIGS. 14 and FIGS. 16 The third pixel (2a) includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included therein, but the fifth length (L5) may be smaller than the seventh length (L7).

[0186] Fig. 18c The third pixel (3a) of FIGS. 14 and FIGS. 16The third pixel (2a) includes subpixels (11, 12, 13, 14) identical to the subpixels (11, 12, 13, 14) included therein, but the fifth length (L5) may be smaller than the seventh length (L7), and the sixth length (L6) may be smaller than the eighth length (L8).

[0188] The center point may vary depending on the luminescence efficiency of the second light source (320) and the luminescence efficiency of the quantum dot pattern (530). The relationship between the fifth length (L5) and the seventh length (L7) and the relationship between the sixth length (L6) and the eighth length (L8) may be independent.

[0190] The display device (2000) according to the present invention can have a high color reproduction rate by preventing light mixing through a reflection pattern (540) interposed between a transparent pattern (510) and a quantum dot pattern (530). A color filter (630) is provided on the quantum dot pattern (530) to contribute to a high color reproduction rate. A plurality of transparent patterns (510) are provided in a zigzag pattern diagonally between a first direction (D1) and a second direction (D2) to increase process convenience. In addition, high light efficiency can be achieved by adjusting the length (L5, L6, L7, L8) of the subpixels (11, 12, 13, 14) in the first direction (D1) and / or the second direction (D2) according to the light emission efficiency of the second light source (320) and the light conversion efficiency of the quantum dot pattern (530).

[0192] Fig. 19 is a plan view of a display device according to some embodiments of the present invention. Fig. 20 This is a plan view of the pixel in Fig. 19.

[0193] FIGS. 19 and FIGS. 20 Referring to the above, a display device (2100) according to some embodiments of the present invention may be provided. The display device (2100) may include a plurality of fourth pixels (2b).

[0194] The subpixels (21, 22, 23, 24) included in the fourth pixel (2b) may be identical to those of the third pixel (2a). In the fourth pixel (2b), the arrangement of the subpixels may be different from that of the third pixel (2a). Fig. 20 Referring to the, the fifth subpixel (21) and the sixth subpixel (22) may be adjacent in the second direction (D2), and the fifth subpixel (21) and the seventh subpixel (23) may be adjacent in the first direction (D1).

[0196] [Method for manufacturing a display device]

[0197] Hereinafter, a method for manufacturing a display device according to some embodiments of the present invention will be described.

[0198] Fig. 21a Figure 14 illustrates a method for manufacturing a display device according to some embodiments of the present invention.

[0199] A method for manufacturing display devices (2000) according to some embodiments of the present invention comprises forming a backplane (100) (S11), forming a second light source (320) on the backplane (100) (S'12), forming a barrier layer (not shown) on the second light source (320) (S'13), etching at least a portion of the barrier layer (not shown) to form a transparent pattern (510) (S'14), forming a third trench (T3) by forming the transparent pattern (510) and forming a reflection pattern (540) surrounding the side of the transparent pattern (510) (S'15), forming a fourth trench (T4) by forming the reflection pattern (540) and filling the fourth trench (T4) with a quantum dot material to form a quantum dot pattern (530) (S'16), and forming a color filter (620, 640) on the transparent pattern (510). It may include (S19), and forming a color filter (630) on the quantum dot pattern (530) (S20).

[0201] Fig. 21b Figure 14 illustrates a method for manufacturing a display device according to some embodiments of the present invention.

[0202] Fig. 21b cast Fig. 21a With reference to the above, forming a color filter (620, 640) on a transparent pattern (510) (S19) and forming a color filter (630) on a quantum dot pattern (530) (S20) can be performed regardless of the temporal sequence. That is. Fig. 21a After forming the first and third color filters (620, 640) as shown above, the second color filter (630) may also be formed, and Fig. 21b After forming the second color filter (630) as shown above, the first and third color filters (620, 640) can be formed.

[0204] FIGS. 22a to 26b Figure 14 illustrates a method for manufacturing a display device according to some embodiment of the present invention.

[0205] FIGS. 22a and FIGS. 22b Referring to the, a backplane (100) may be formed. A lower electrode (210) may be formed on the backplane (100). An insulating pattern (220) may be formed on the backplane (100).

[0206] A second light source (320) may be formed on the lower electrode (210). Forming the second light source (320) may include forming a hole injection layer, a hole transport layer, a color emitting layer, an electron transport layer, and an electron injection layer in sequence. The second light source (320) may be formed through a thermal deposition process.

[0207] An upper electrode (230) may be formed on the second light source (320). An intermediate layer (410) may be formed on the upper electrode (230).

[0209] FIGS. 23a and FIGS. 23b Referring to the, a partition layer (511) can be formed on the intermediate layer (410).

[0211] FIGS. 24a and FIGS. 24b Referring to the above, at least a portion of the partition layer (511) can be removed to form a transparent pattern (510).

[0212] The transparent patterns (510) may be provided in multiple numbers. A third trench (T3) may be formed between the transparent patterns (510). The third trench (T3) may expose the upper surface of the intermediate layer (410). As it approaches the backplane (100), the width of the third trench (T3) in the first direction (D1) or the second direction (D2) may be constant or narrow.

[0213] Removing at least a portion of the partition layer (511) may, for example, include etching at least a portion of the partition layer (511) and / or developing at least a portion of the partition layer (511).

[0215] FIGS. 25a and FIGS. 25b Referring to the above, a reflective pattern (540) may be formed on the side of the transparent pattern (510). The reflective pattern (540) may cover the side of the transparent pattern (510).

[0216] A fourth trench (T4) may be formed by the formation of a reflection pattern (540). The fourth trench (T4) may expose the upper surface of the intermediate layer (410). The fourth trench (T4) may be interposed between mutually spaced transparent patterns (510) and between mutually spaced reflection patterns (540). The width of the fourth trench (T4) may be equal to or smaller than the width of the third trench (T3). As it approaches the backplane (100), the width of the fourth trench (T4) in the first direction (D1) or the second direction (D2) may be constant or narrow.

[0217] Forming a reflection pattern (540) may, for example, include forming a reflection layer (not shown) on the upper surface of a transparent pattern (510), the side of a transparent pattern (510), and the upper surface of an intermediate layer (410), and etching the reflection layer (not shown) formed on the upper surface of the transparent pattern (510) and the upper surface of the intermediate layer (410).

[0219] FIGS. 26a and FIGS. 26b Referring to the, a second quantum dot pattern (530) can be formed on the intermediate layer (410) of the fifth subpixel (21) and the eighth subpixel (24).

[0220] Forming the second quantum dot pattern (530) may, for example, include optionally filling the fourth trench (T4) of the fifth subpixel (21) and the eighth subpixel (24) with quantum dots. Filling the fourth trench (T4) with quantum dots may, for example, include forming a quantum dot layer (not shown) on the upper surface of the intermediate layer (410), the side of the reflection pattern (540), and the upper surface of the transparent pattern (510), and etching the quantum dot layer (not shown). For example, etching the quantum dot layer (not shown) may include flattening the quantum dot layer (not shown). Flattening the quantum dot layer (not shown) may be performed until the upper surface of the transparent pattern (510) is exposed.

[0222] again FIGS. 17a and FIGS. 17b Referring to the above, color filters (620, 640) may be formed on a transparent pattern (510). Specifically, a first color filter (620) may be formed on the transparent pattern (510) of the sixth subpixel (22). A third color filter (640) may be formed on the transparent pattern (510) of the seventh subpixel (23). A second color filter (630) may be formed on the second quantum dot patterns (530). The first color filter (620), the second color filter (630), and the third color filter (640) may be formed regardless of the temporal sequence.

[0223] Forming the first color filter (620) may, for example, include optionally depositing the first color filter (620) on the transparent pattern (510) of the sixth subpixel (22). Forming the second color filter (630) may, for example, include optionally depositing the second color filter (630) on the quantum dot pattern (530) of the fifth subpixel (21) and the eighth subpixel (24). Forming the third color filter (640) may, for example, include optionally depositing the third color filter (640) on the transparent pattern (510) of the seventh subpixel (23). Forming the first color filter (620), forming the second color filter (630), and forming the third color filter (640) may, for example, be performed through a photolithography process.

[0225] The method for manufacturing a display device (2000) according to the present invention can achieve a high color reproduction rate by preventing light mixing through the formation of transparent patterns (510) arranged in a zigzag pattern in a diagonal direction between a first direction (D1) and a second direction (D2), and then forming a reflective pattern (540).

[0227] Although embodiments of the present invention have been described above with reference to the attached drawings, the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

Claim 1 A display device comprising: a backplane; a light source on the backplane; quantum dot patterns spaced apart from each other on the light source; a transparent pattern disposed on the light source and spaced apart from the quantum dot patterns in a first direction parallel to the upper surface of the backplane; and reflective patterns interposed between each of the quantum dot patterns and the transparent pattern and spaced apart from each other, wherein the transparent pattern contacts and covers the outer surfaces of the reflective patterns, and each of the quantum dot patterns contacts the inner surface of one of the reflective patterns adjacent thereto. Claim 2 A display device according to claim 1, wherein the transparent pattern comprises at least one of an inorganic thin film, an organic thin film, an organic-inorganic composite thin film, or a combination thereof. Claim 3 A display device according to claim 1, wherein the quantum dot patterns include quantum dots, and the quantum dots include at least one of a group II-VI compound, a group III-V compound, a group IV-VI compound, a group I-III-VI compound, a group IV element, or a group IV compound, or a combination thereof. Claim 4 A display device according to claim 1, wherein the reflection patterns comprise at least one of a metal element, a metal alloy, a transition metal oxide, a metal nitride, or an inorganic thin film, or a combination thereof. Claim 5 In paragraph 1, the light source is a blue light source, and the display device. Claim 6 In paragraph 1, the light source is a blue-green light source in the display device. Claim 7 A display device according to claim 1, further comprising a scattering pattern on the transparent pattern; and a color filter on each of the quantum dot patterns. Claim 8 A display device according to claim 7, wherein the scattering pattern comprises a scattering agent, and the scattering agent comprises at least one of titanium oxide (TiO2), zinc oxide (ZnO), tin oxide (SnO), silicon oxide (SiO), nickel oxide (NiO), magnesium oxide (MgO), zirconium oxide (ZrO2), barium titanate (BaTiO3), silicon carbide (SiC), boron nitride (BN), aluminum nitride (AlN), gallium nitride (GaN), zinc sulfide (ZnS), copper chloride (CuCl), strontium titanate (SrTiO3), or lithium niobate (LiNbO3), or a combination thereof. Claim 9 A display device according to claim 1, further comprising: a blue color filter on the transparent pattern; a green color filter on the transparent pattern; and a red color filter on each of the quantum dot patterns. Claim 10 A display device according to claim 1, wherein the transparent pattern is provided in plurality, and the quantum dot patterns and the transparent patterns are alternately arranged in the first direction. Claim 11 In claim 1, the transparent pattern is a display device in which the width of the lower surface in the first direction is equal to or greater than the width of the upper surface. Claim 12 In claim 1, the quantum dot pattern is a display device in which the width of the upper surface in the first direction is equal to or greater than the width of the lower surface. Claim 13 A display device according to claim 1, wherein the quantum dot patterns are arranged in a zigzag pattern along a diagonal between the first direction and a second direction perpendicular to the first direction. Claim 14 A display device comprising: a backplane; and a plurality of pixels on the backplane, wherein each of the plurality of pixels comprises a first subpixel and a second subpixel, wherein the first subpixel comprises: a quantum dot pattern on the backplane; a reflection pattern in contact with and surrounding the sides of the quantum dot pattern; and a first color filter on the quantum dot pattern, and the second subpixel comprises a transparent pattern spaced apart from the quantum dot pattern with the reflection pattern in between on the backplane, and a second color filter on the transparent pattern that overlaps with the transparent pattern, wherein the transparent pattern is in contact with and covers the outer surfaces of the reflection pattern. Claim 15 delete Claim 16 In paragraph 14, the colors of the first color filter and the second color filter are different in the display device. Claim 17 A display device comprising: a backplane; a light source on the backplane; quantum dot patterns spaced apart from each other on the light source; transparent patterns disposed on the light source and spaced apart from the quantum dot patterns in a first direction parallel to the upper surface of the backplane; and reflective patterns interposed between the quantum dot patterns and the transparent patterns and spaced apart from each other, wherein the quantum dot patterns are arranged in a zigzag pattern along a diagonal between the first direction and a second direction perpendicular to the first direction, the reflective patterns are arranged in a zigzag pattern along the diagonal, the lower surfaces of the transparent patterns are connected to each other and their upper surfaces are arranged in a zigzag pattern along the diagonal, the quantum dot patterns and the transparent patterns are alternately arranged in the first direction and the second direction, the transparent patterns contact and cover the outer surfaces of the reflective patterns, and each of the quantum dot patterns contacts the inner surface of one of the reflective patterns adjacent thereto. Claim 18 delete Claim 19 A display device according to claim 17, further comprising a scattering pattern on the transparent patterns; and a color filter on the quantum dot patterns, wherein the quantum dot patterns include a green quantum dot pattern and a red quantum dot pattern, and the color filter includes a green color filter and a red color filter. Claim 20 In claim 17, a display device further comprising a first color filter on the transparent patterns; and a second color filter on the quantum dot patterns, wherein the colors of the first color filter and the second color filter are different.

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