WO2024005476A1 - 표시 장치 - Google Patents
표시 장치 Download PDFInfo
- Publication number
- WO2024005476A1 WO2024005476A1 PCT/KR2023/008839 KR2023008839W WO2024005476A1 WO 2024005476 A1 WO2024005476 A1 WO 2024005476A1 KR 2023008839 W KR2023008839 W KR 2023008839W WO 2024005476 A1 WO2024005476 A1 WO 2024005476A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- electrode
- light emitting
- light
- pixel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/451—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs characterised by the compositions or shapes of the interlayer dielectrics
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/814—Bodies having reflecting means, e.g. semiconductor Bragg reflectors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
- H10H20/831—Electrodes characterised by their shape
- H10H20/8312—Electrodes characterised by their shape extending at least partially through the bodies
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
- H10H20/831—Electrodes characterised by their shape
- H10H20/8314—Electrodes characterised by their shape extending at least partially onto an outer side surface of the bodies
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
- H10H20/841—Reflective coatings, e.g. dielectric Bragg reflectors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8514—Wavelength conversion means characterised by their shape, e.g. plate or foil
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
- H10H20/856—Reflecting means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/813—Bodies having a plurality of light-emitting regions, e.g. multi-junction LEDs or light-emitting devices having photoluminescent regions within the bodies
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/817—Bodies characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous
- H10H20/818—Bodies characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous within the light-emitting regions
Definitions
- the present invention relates to a display device.
- the purpose of the present invention is to provide a display device capable of improving reliability.
- a display device includes a substrate including a light-emitting area and a non-emission area; a plurality of light emitting elements provided on the substrate; a first electrode and a second electrode disposed to be spaced apart from each other and electrically connected to the plurality of light emitting elements; a cover layer disposed on the first electrode and the second electrode; And it may include a color conversion layer disposed on the cover layer.
- the cover layer may include a plurality of sub-insulating layers, each of which includes a first layer and a second layer sequentially stacked. The first layer and the second layer may have different refractive indices.
- the first layer may be a first inorganic layer having a first refractive index
- the second layer may be a second inorganic layer having a second refractive index
- the first refractive index may be smaller than the second refractive index.
- the first inorganic layer may include silicon oxide, and the second inorganic layer may include silicon nitride.
- each of the plurality of sub-insulating layers may further include a third layer stacked on the second layer.
- the third layer may be a third inorganic film having a third refractive index.
- the third refractive index may be different from the second refractive index.
- the second refractive index may be smaller than the first refractive index.
- the first inorganic layer may include silicon nitride, and the second inorganic layer may include silicon oxide.
- the cover layer may pass light within a predetermined wavelength range.
- the color conversion layer may include color conversion particles that convert light emitted from the plurality of light-emitting devices into different wavelengths.
- the display device may include a first insulating layer disposed between the substrate and the plurality of light emitting devices; a second insulating layer disposed on each of the plurality of light emitting devices; And it may further include a third insulating layer disposed on the first electrode.
- the thickness of the cover layer may be 2 ⁇ m or less.
- the display device may further include an additional insulating layer disposed between the first and second electrodes and the cover layer.
- the additional insulating layer may include an organic layer.
- the thickness of the additional insulating layer may be about 1.0 ⁇ m to 1.3 ⁇ m.
- the additional insulating layer may include an inorganic film.
- the display device includes a first alignment electrode and a second alignment electrode located between the substrate and the first insulating layer and spaced apart from each other.
- a first bank provided in the non-emission area and including an opening corresponding to the light emission area;
- a second bank located on the first bank in the non-emission area and surrounding the color conversion layer;
- it may further include a color filter disposed on the color conversion layer.
- the first electrode may be electrically connected to the first alignment electrode
- the second electrode may be electrically connected to the second alignment electrode
- the display device may further include a pixel circuit layer positioned between the substrate and the plurality of light-emitting devices and including at least one transistor electrically connected to the plurality of light-emitting devices.
- a display device includes a plurality of light emitting elements provided on a substrate; a first electrode and a second electrode disposed to be spaced apart from each other and electrically connected to the plurality of light emitting devices; a cover pattern disposed on the first electrode and covering the first electrode; And it may include a color conversion layer disposed on the cover pattern.
- the cover pattern may include a plurality of sub-insulating layers each including a first layer and a second layer sequentially stacked, and an opening. The first layer and the second layer may have different refractive indices. The opening of the cover pattern may expose the second electrode.
- the color conversion layer may be directly disposed on the cover pattern and the second electrode, and the cover pattern may not be disposed on the second electrode.
- the cover pattern may selectively pass light within a predetermined wavelength range.
- the display device places a cover layer made of a distributed Bragg reflector structure between the light emitting element and the color conversion layer (or QD layer) to reflect the light traveling to the back of the color conversion layer in the front direction to emit light from the pixel.
- a cover layer made of a distributed Bragg reflector structure between the light emitting element and the color conversion layer (or QD layer) to reflect the light traveling to the back of the color conversion layer in the front direction to emit light from the pixel.
- a cover layer is disposed between the light-emitting device and the color conversion layer to secure a gap between the light-emitting device and the color conversion layer, thereby preventing deterioration of the color conversion layer and improving the reliability of the display device. You can.
- Figure 1 is a schematic perspective view showing a light-emitting device according to an embodiment.
- FIG. 2 is a schematic cross-sectional view of the light emitting device of FIG. 1.
- Figure 3 is a schematic plan view showing a display device according to an embodiment.
- FIG. 4 is a schematic circuit diagram showing the electrical connection relationship of components included in each pixel shown in FIG. 3.
- FIG. 5 is a plan view schematically showing the pixel shown in FIG. 3.
- Figure 6 is a schematic cross-sectional view taken along lines I to I' in Figure 5.
- Figure 7 is a schematic cross-sectional view taken along line II to II' of Figure 5.
- Figure 8 is a schematic cross-sectional view taken along line III to III' of Figure 5.
- Figures 9 and 10 are schematic enlarged views showing the EA portion of Figure 7.
- Figures 11 and 12 schematically show a pixel according to an embodiment, and are schematic cross-sectional views corresponding to lines II to II' of Figure 5.
- first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.
- a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.
- the direction of formation is not limited to the upward direction and includes formation in the side or downward direction.
- a part of a layer, membrane, region, plate, etc. is said to be “beneath” another part, this includes not only cases where it is “immediately below” another part, but also cases where there is another part in between.
- a component e.g., a 'first component'
- another component e.g., a 'second component'
- the component is directly connected to the other component, or to another component (for example, a 'third component').
- a certain component for example, a 'first component'
- a 'second component' When referred to as being “connected,” it can be understood that no other component (for example, a “third component”) exists between a certain component and the other component.
- FIG. 1 is a schematic perspective view showing a light-emitting device LD according to an embodiment
- FIG. 2 is a schematic cross-sectional view of the light-emitting device LD of FIG. 1 .
- the light emitting device LD includes a first semiconductor layer 11, a second semiconductor layer 13, and an active layer disposed between the first and second semiconductor layers 11 and 13. 12) may be included.
- the light emitting device LD may be implemented as a light emitting stack (or stack pattern) in which the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13 are sequentially stacked.
- the type and/or shape of the light emitting device LD is not limited to the embodiment shown in FIG. 1 .
- the light emitting device LD may be provided in a shape extending in one direction. If the extension direction of the light emitting device LD is the longitudinal direction, the light emitting device LD may include a first end EP1 and a second end EP2 facing each other along the length direction. One of the first semiconductor layer 11 and the second semiconductor layer 13 may be located at the first end EP1 of the light emitting device LD, and the second semiconductor layer 13 may be located at the second end EP2 of the light emitting device LD. The remainder of the first semiconductor layer 11 and the second semiconductor layer 13 may be located. As an example, the second semiconductor layer 13 may be located at the first end (EP1) of the light-emitting device (LD), and the first semiconductor layer 11 may be located at the second end (EP2) of the light-emitting device (LD). This location can be
- the light emitting device (LD) may be provided in various shapes.
- the light emitting device LD has a rod-like shape, a bar-like shape, or a pillar shape that is long in the longitudinal direction (or has an aspect ratio greater than 1), as shown in FIG. 1. You can have it.
- the light emitting device LD may have a rod shape, a bar shape, or a pillar shape that is short in the longitudinal direction (or has an aspect ratio less than 1).
- the light emitting device LD may have a rod shape, a bar shape, or a pillar shape with an aspect ratio of 1.
- LD light emitting devices
- D diameter
- L length
- LED manufactured light emitting diode
- the diameter (D) of the light emitting device (LD) may be about 0.5 ⁇ m to 6 ⁇ m, and the length (L) may be about 1 ⁇ m to 6 ⁇ m. It may be about 10 ⁇ m.
- the diameter (D) and length (L) of the light emitting element (LD) are not limited to this, and must be made to meet the requirements (or design conditions) of the lighting device or self-luminous display device to which the light emitting element (LD) is applied.
- the size of the light emitting element LD may be changed.
- the first semiconductor layer 11 may include at least one n-type semiconductor layer.
- the first semiconductor layer 11 includes at least one semiconductor material selected from InAlGaN, GaN, AlGaN, InGaN, AlN, and InN, and a dopant of first conductivity such as Si, Ge, Sn, etc. (or an n-type dopant) ) may be a doped n-type semiconductor layer.
- the material constituting the first semiconductor layer 11 is not limited to this, and the first semiconductor layer 11 may be composed of various other materials.
- the active layer 12 is disposed on the first semiconductor layer 11 and may be formed as a single or multiple quantum wells structure.
- the active layer 12 includes a barrier layer (not shown), a strain reinforcing layer, and a well layer. It can be periodically and repeatedly stacked as a unit.
- the structure of the active layer 12 is not limited to the above-described embodiment.
- the active layer 12 can emit light with a wavelength of 400 nm to 900 nm, and can use a double hetero structure.
- a clad layer (not shown) doped with a conductive dopant may be formed on the top and/or bottom of the active layer 12 along the longitudinal direction of the light emitting device LD.
- the clad layer may be formed of AlGaN or InAlGaN.
- materials such as AlGaN and InAlGaN may be used to form the active layer 12, and various other materials may form the active layer 12.
- the active layer 12 may include a first surface in contact with the first semiconductor layer 11 and a second surface in contact with the second semiconductor layer 13.
- the light emitting device LD When an electric field of a predetermined voltage or higher is applied to both ends of the light emitting device LD, electron-hole pairs combine in the active layer 12 and the light emitting device LD emits light.
- the light emitting device LD can be used as a light source (or light emitting source) for various light emitting devices, including pixels of a display device.
- the second semiconductor layer 13 is disposed on the second side of the active layer 12 and may include a different type of semiconductor layer than the first semiconductor layer 11.
- the second semiconductor layer 13 may include at least one p-type semiconductor layer.
- the second semiconductor layer 13 includes at least one semiconductor material selected from InAlGaN, GaN, AlGaN, InGaN, AlN, and InN, and a dopant of second conductivity such as Mg, Zn, Ca, Sr, Ba, etc. ( or a p-type dopant) may include a p-type semiconductor layer doped.
- the material constituting the second semiconductor layer 13 is not limited to this, and various other materials may constitute the second semiconductor layer 13.
- the first semiconductor layer 11 and the second semiconductor layer 13 may have different thicknesses in the longitudinal direction of the light emitting device LD.
- the first semiconductor layer 11 may have a relatively greater thickness than the second semiconductor layer 13 along the longitudinal direction of the light emitting device LD.
- each of the first semiconductor layer 11 and the second semiconductor layer 13 includes at least one layer, for example, a clad layer and/or a tensile strain barrier reducing (TSBR) layer. It may also include more.
- the TSBR layer may be a strain relaxation layer that is disposed between semiconductor layers with different lattice structures and serves as a buffer to reduce lattice constant differences.
- the TSBR layer may be composed of a p-type semiconductor layer such as p-GaInP, p-AlInP, p-AlGaInP, etc., but is not limited thereto.
- the light emitting device is a contact electrode disposed on the second semiconductor layer 13 in addition to the above-described first semiconductor layer 11, active layer 12, and second semiconductor layer 13 ( It may further include (not shown, hereinafter referred to as a 'first contact electrode'). Additionally, according to another embodiment, it may further include another contact electrode (not shown, hereinafter referred to as a 'second contact electrode') disposed at one end of the first semiconductor layer 11.
- Each of the first and second contact electrodes may be an ohmic contact electrode, but is not limited thereto.
- the first and second contact electrodes may be Schottky contact electrodes.
- the first and second contact electrodes may include a conductive material.
- the first and second contact electrodes are made of chromium (Cr), titanium (Ti), aluminum (Al), gold (Au), nickel (Ni), and their oxides or alloys alone or in combination. It may include, but is not limited to, opaque metal used.
- the first and second contact electrodes include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnOx), and indium gallium zinc oxide (indium It may also contain transparent conductive oxides such as gallium zinc oxide (IGZO) and indium tin zinc oxide (ITZO).
- Zinc oxide (ZnOx) may be zinc oxide (ZnO), and/or zinc peroxide (ZnO2).
- first and second contact electrodes may be the same or different from each other.
- the first and second contact electrodes can be substantially transparent or translucent. Accordingly, light generated in the light emitting device LD may pass through each of the first and second contact electrodes and be emitted to the outside of the light emitting device LD. Depending on the embodiment, the light generated in the light-emitting device (LD) does not pass through the first and second contact electrodes and is emitted to the outside of the light-emitting device (LD) through an area excluding both ends of the light-emitting device (LD). If applicable, the first and second contact electrodes may include an opaque metal.
- the light emitting device LD may further include an insulating film 14.
- the insulating film 14 may be omitted and may be provided to cover only part of the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13.
- the insulating film 14 can prevent an electrical short circuit that may occur when the active layer 12 comes into contact with a conductive material other than the first and second semiconductor layers 11 and 13. Additionally, the insulating film 14 can minimize surface defects of the light emitting device LD and improve the lifespan and luminous efficiency of the light emitting device LD. Additionally, when a plurality of light emitting devices LD are closely arranged, the insulating film 14 can prevent unwanted short circuits that may occur between the light emitting devices LD. As long as the active layer 12 can prevent a short circuit with an external conductive material, there is no limitation on whether the insulating film 14 is provided.
- the insulating film 14 may be provided to entirely surround the outer peripheral surface of the light emitting laminate including the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13.
- the insulating film 14 is described as entirely surrounding the outer peripheral surfaces of each of the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13, but it is not limited thereto.
- the insulating film 14 may be connected to the first semiconductor layer 11, the active layer 12, the second semiconductor layer 13, and the first contact electrode.
- the outer peripheral surface of each electrode may be entirely surrounded.
- the insulating film 14 may not entirely surround the outer circumferential surface of the first contact electrode, or may surround only a portion of the outer circumferential surface of the first contact electrode and not surround the remainder of the outer circumferential surface of the first contact electrode. there is.
- the insulating film 14 may expose at least one area of each of the first and second contact electrodes.
- the insulating film 14 may include a transparent insulating material.
- the insulating film 14 may be formed of silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum oxide (AlO x ) , titanium oxide (TiO HfO x ), strontium titanium oxide ( SrTiO x ), cobalt oxide (Co x O y ), magnesium oxide ( MgO ), zinc oxide (ZnO (WO x ), tantalum oxide (TaO x ), gadolinium oxide (GdO x ), zirconium oxide (ZrO x ), gallium oxide (GaO x ), vanadium oxide (V x O y ), ZnO:Al, ZnO:B, In x O y :H, niobium oxide ( Nb x O y ), magnesium fluoride ( MgF ( Al
- the insulating film 14 may be provided in the form of a single film or in the form of a multilayer including a double film.
- the first layer and the second layer may be composed of different materials (or materials), It can be formed by different processes.
- the first layer and the second layer may include the same material and be formed through a continuous process.
- the light emitting device LD may be implemented with a light emitting pattern of a core-shell structure.
- the above-described first semiconductor layer 11 may be located in the core, for example, in the center (or center) of the light emitting device LD, and the active layer 12 may be located in the first semiconductor layer ( 11), and the second semiconductor layer 13 may be provided and/or formed to surround the active layer 12.
- the light emitting device LD may further include a contact electrode (not shown) surrounding at least one side of the second semiconductor layer 13.
- the light emitting device LD may further include an insulating film 14 provided on the outer peripheral surface of the light emitting pattern of the core-shell structure and including a transparent insulating material.
- a light emitting device (LD) implemented with a core-shell structured light emitting pattern can be manufactured by a growth method.
- the above-mentioned light emitting device (LD) can be used as a light emitting source (or light source) for various display devices.
- a light emitting device (LD) can be manufactured through a surface treatment process. For example, when a plurality of light-emitting elements LD are mixed in a fluid solution (or solvent) and supplied to each pixel area (eg, a light-emitting area of each pixel or a light-emitting area of each sub-pixel), the light emission Each light emitting device LD may be surface treated so that the devices LD can be uniformly sprayed without agglomerating unevenly in the solution.
- a light emitting unit (light emitting device or light emitting unit) including the light emitting element LD described above can be used in various types of electronic devices that require a light source, including display devices.
- the light-emitting devices LD when a plurality of light-emitting devices LD are disposed in the pixel area of each pixel of a display panel, the light-emitting devices LD can be used as a light source for each pixel.
- the application field of the light emitting device (LD) is not limited to the above-described examples.
- the light emitting device (LD) can also be used in other types of electronic devices that require a light source, such as lighting devices.
- FIG. 3 is a schematic plan view showing a display device DD according to an embodiment.
- the structure of the display device DD for example, the display panel DP provided in the display device DD, is briefly shown centered on the display area DA where the image is displayed. .
- Display devices include smartphones, televisions, tablet PCs, mobile phones, video phones, e-book readers, desktop PCs, laptop PCs, netbook computers, workstations, servers, PDAs, portable multimedia players (PMPs), MP3 players,
- the present invention can be applied to any electronic device with a display surface applied to at least one side, such as a medical device, camera, or wearable.
- the display device DD can be classified into a passive matrix type display device and an active matrix type display device depending on the method of driving the light emitting element LD. You can.
- each of the pixels (PXL) has a driving transistor that controls the amount of current supplied to the light emitting device (LD) and transmits a data signal to the driving transistor. It may include a switching transistor, etc.
- the display panel DP (or display device DD) may include a substrate SUB and pixels PXL disposed on the substrate SUB. Each pixel (PXL) may include at least one light emitting element (LD).
- LD light emitting element
- the substrate SUB may include a display area DA and a non-display area NDA.
- the display area DA may be an area where pixels PXL that display images are provided.
- the non-display area NDA may be an area where a driver for driving each pixel PXL and a plurality of wires connecting each pixel PXL and the driver are provided.
- the non-display area NDA may be located adjacent to the display area DA.
- the non-display area NDA may be provided on at least one side of the display area DA.
- the non-display area NDA may surround the perimeter (or edge) of the display area DA.
- wires connected to each pixel PXL and a driver connected to the wires and driving the pixel PXL may be provided.
- Wires can electrically connect the driver and each pixel (PXL).
- the wires provide signals to each pixel (PXL) and may include signal lines connected to each pixel (PXL), for example, a fan-out line connected to a scan line, a data line, etc. Additionally, depending on the embodiment, the wires include signal lines connected to each pixel (PXL) in order to compensate for changes in the electrical characteristics of each pixel (PXL) in real time, for example, a fan-out line connected to a control line, a sensing line, etc. can do. Additionally, the wires provide a predetermined voltage to each pixel (PXL) and may include a fan-out line connected to power wires connected to each pixel (PXL).
- the substrate (SUB) may include a transparent insulating material to allow light to pass through.
- the substrate (SUB) may be a rigid substrate or a flexible substrate.
- the rigid substrate can be, for example, one of a glass substrate, a quartz substrate, a glass ceramic substrate, and a crystalline glass substrate.
- the flexible substrate may be one of a film substrate containing a polymer organic material and a plastic substrate.
- flexible substrates include polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethersulfone, polyacrylate, and polyetherimide. ), polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, triacetate cellulose ( It may include at least one of triacetate cellulose and cellulose acetate propionate.
- the substrate SUB may be provided as a display area DA in which pixels PXL are disposed, and the remaining area on the substrate SUB may be provided as a non-display area NDA.
- the substrate SUB includes a display area DA including pixel areas where each pixel PXL is disposed, and a ratio disposed around the display area DA (or adjacent to the display area DA). May include a display area (NDA).
- Each of the pixels PXL may be provided in the display area DA on the substrate SUB.
- the pixels PXL may be arranged in the display area DA in a stripe arrangement structure, but the present invention is not limited thereto.
- Each of the pixels PXL may include a pixel circuit layer (see “PCL” in FIG. 6) and a display element layer (see “DPL” in FIG. 6) located on the substrate SUB.
- PCL pixel circuit layer
- DPL display element layer
- a pixel circuit (see “PXC" in FIG. 4) provided on the substrate SUB and including a plurality of transistors and signal wires connected to the transistors may be disposed.
- each transistor may have a structure in which a semiconductor layer, a gate electrode, a first terminal, and a second terminal are sequentially stacked with an insulating layer interposed therebetween.
- the semiconductor layer may include amorphous silicon, poly silicon, low temperature poly silicon, organic semiconductor, and/or oxide semiconductor.
- the gate electrode, the first terminal (or source region), and the second terminal (or drain region) may include at least one of aluminum (Al), copper (Cu), titanium (Ti), and molybdenum (Mo). It is not limited to this.
- the pixel circuit layer may include at least one insulating layer.
- a display element layer may be disposed on the pixel circuit layer.
- a light emitting unit (see “EMU” in FIG. 4 ) including a light emitting element LD that emits light may be located in the display element layer DPL.
- a first alignment electrode (or first alignment wire) and a second alignment electrode (or second alignment wire) that are spaced apart from each other may be disposed in the light emitting unit.
- a light emitting device LD may be disposed between the first alignment electrode and the second alignment electrode.
- Each pixel may include at least one light emitting element (LD) driven by a corresponding scan signal and data signal.
- the light emitting device LD has a small size ranging from nanoscale (or nanometer) to microscale (or micrometer) and may be connected in parallel with adjacent light emitting devices, but is not limited to this.
- the light emitting device LD may constitute a light source for each pixel PXL.
- FIG. 4 is a schematic circuit diagram showing the electrical connection relationship of components included in each of the pixels PXL shown in FIG. 3.
- FIG. 4 illustrates the electrical connection relationship of components included in a pixel (PXL) that can be applied to an active matrix display device according to an embodiment.
- PXL pixel
- the connection relationship between the components of each pixel (PXL) is not limited to this.
- the pixel PXL may include an light emitting unit (EMU) (or light emitting unit) that generates light with a brightness corresponding to a data signal. Additionally, the pixel PXL may include a pixel circuit PXC for driving the light emitting unit EMU.
- EMU light emitting unit
- PXC pixel circuit
- the light emitting unit (EMU) is connected to the first driving power supply (VDD) and connected to the first power wiring (PL1) to which the voltage of the first driving power supply (VDD) is applied and the second driving power supply (VSS).
- VDD first driving power supply
- PL1 first power wiring
- VDD first driving power supply
- VSS second driving power supply
- the light emitting unit (EMU) has a first electrode (PE1) (or a first pixel electrode) connected to the first driving power source (VDD) via the pixel circuit (PXC) and the first power line (PL1).
- a second electrode (PE2) (or second pixel electrode) connected to the second driving power source (VSS) through the second power line (PL2), and the first and second electrodes (PE1, PE2) are identical to each other. It may include light emitting elements (LD) connected in parallel in one direction.
- the first electrode PE1 may be an anode
- the second electrode PE2 may be a cathode.
- Each of the light emitting elements LD included in the light emitting unit EMU has one end (or first end EP1) connected to the first driving power source VDD through the first electrode PE1 and a second electrode ( It may include the other end (or the second end (EP2)) connected to the second driving power source (VSS) through PE2).
- the first driving power source (VDD) and the second driving power source (VSS) may have different potentials.
- the first driving power source (VDD) may be set as a high-potential power source
- the second driving power source (VSS) may be set as a low-potential power source.
- the potential difference between the first and second driving power sources VDD and VSS may be set to be higher than the threshold voltage of the light emitting elements LD during the emission period of the pixel PXL.
- each light emitting element LD connected in parallel in the same direction (eg, forward direction) between the first electrode PE1 and the second electrode PE2 to which voltages of different power sources are supplied is each An effective light source can be configured.
- the light emitting elements LD of the light emitting unit EMU may emit light with a luminance corresponding to the driving current supplied through the corresponding pixel circuit PXC.
- a driving current corresponding to the gray level value of the corresponding frame data of the pixel circuit (PXC) may be supplied to the light emitting unit (EMU).
- the driving current supplied to the light emitting unit (EMU) may flow separately to each light emitting element (LD). Accordingly, while each light emitting element LD emits light with a brightness corresponding to the current flowing therein, the light emitting unit EMU may emit light with a brightness corresponding to the driving current.
- the light emitting unit EMU may further include at least one non-effective light source, for example, a reverse light emitting element LDr, in addition to the light emitting elements LD constituting each effective light source.
- This reverse light-emitting element LDr is connected in parallel between the first and second electrodes PE1 and PE2 together with the light-emitting elements LD constituting the effective light sources, but is different from the light-emitting elements LD. It may be connected between the first and second electrodes PE1 and PE2 in opposite directions.
- This reverse light emitting element (LDr) remains in an inactive state even if a predetermined driving voltage (for example, a forward driving voltage) is applied between the first and second electrodes (PE1 and PE2), and accordingly, the reverse light emitting element (LDr) remains in an inactive state. Substantially no current flows through the light emitting element (LDr).
- a predetermined driving voltage for example, a forward driving voltage
- the pixel circuit (PXC) of the pixel (PXL) may be connected to the scan line (Si) and the data line (Dj). Additionally, the pixel circuit (PXC) of the pixel (PXL) may be connected to the control line (CLi) and the sensing line (SENj). For example, when the pixel PXL is disposed in the ith row and jth column of the display area DA, the pixel circuit PXC of the pixel PXL is connected to the ith scan line Si of the display area DA. , may be connected to the jth data line (Dj), the ith control line (CLi), and the jth sensing line (SENj).
- the pixel circuit PXC may include first to third transistors T1 to T3 and a storage capacitor Cst.
- the first transistor T1 is a driving transistor for controlling the driving current applied to the light emitting unit (EMU), and may be connected between the first driving power source (VDD) and the light emitting unit (EMU).
- the first terminal of the first transistor T1 may be connected to the first driving power source VDD through the first power line PL1, and the second terminal of the first transistor T1 may be connected to the second node. It is connected to (N2), and the gate electrode of the first transistor (T1) may be connected to the first node (N1).
- the first transistor T1 controls the amount of driving current applied to the light emitting unit (EMU) from the first driving power source (VDD) through the second node (N2) according to the voltage applied to the first node (N1). can do.
- the first terminal of the first transistor T1 may be a drain electrode, and the second terminal of the first transistor T1 may be a source electrode, but the present invention is not limited thereto.
- the first terminal may be a source electrode and the second terminal may be a drain electrode.
- the second transistor T2 is a switching transistor that selects the pixel PXL and activates the pixel PXL in response to the scan signal, and may be connected between the data line Dj and the first node N1.
- the first terminal of the second transistor T2 is connected to the data line Dj
- the second terminal of the second transistor T2 is connected to the first node N1
- the gate electrode of the second transistor T2 may be connected to the scan line (Si).
- the first terminal and the second terminal of the second transistor T2 are different terminals. For example, if the first terminal is a drain electrode, the second terminal may be a source electrode.
- the second transistor T2 is turned on when a scan signal of the gate-on voltage (eg, high level voltage) is supplied from the scan line Si, and is connected to the data line Dj and the first node ( N1) can be connected electrically.
- the first node (N1) is a point where the second terminal of the second transistor (T2) and the gate electrode of the first transistor (T1) are connected, and the second transistor (T2) is connected to the gate electrode of the first transistor (T1). Data signals can be transmitted.
- the third transistor T3 connects the first transistor T1 to the sensing line SENj, obtains a sensing signal through the sensing line SENj, and uses the sensing signal to set the threshold voltage of the first transistor T1.
- the characteristics of the pixel (PXL), including etc., can be detected. Information about the characteristics of the pixels PXL can be used to convert image data so that characteristic differences between the pixels PXL can be compensated.
- the second terminal of the third transistor T3 may be connected to the second terminal of the first transistor T1, the first terminal of the third transistor T3 may be connected to the sensing line SENj, and the third transistor T3 may be connected to the second terminal of the first transistor T1.
- the gate electrode of (T3) may be connected to the control line (CLi).
- the first terminal of the third transistor T3 may be connected to an initialization power source.
- the third transistor T3 is an initialization transistor capable of initializing the second node N2, and is turned on when a sensing control signal is supplied from the control line CLi to increase the voltage of the initialization power supply to the second node N2. It can be delivered to . Accordingly, the second storage electrode of the storage capacitor Cst connected to the second node N2 may be initialized.
- the storage capacitor Cst may include a first storage electrode (or lower electrode) and a second storage electrode (or upper electrode).
- the first storage electrode of the storage capacitor Cst may be connected to the first node N1, and the second storage electrode of the storage capacitor Cst may be connected to the second node N2.
- This storage capacitor Cst charges a data voltage corresponding to the data signal supplied to the first node N1 during one frame period. Accordingly, the storage capacitor Cst can store a voltage corresponding to the difference between the voltage of the gate electrode of the first transistor T1 and the voltage of the second node N2.
- the light emitting unit (EMU) may be configured to include at least one serial stage (or stage) including a plurality of light emitting elements (LD) connected in parallel to each other.
- the light emitting unit (EMU) may be configured in a series/parallel mixed structure.
- FIG. 4 illustrates an embodiment in which the first, second, and third transistors T1, T2, and T3 included in the pixel circuit PXC are all N-type transistors, but the present invention is not limited thereto. For example, at least one of the above-described first, second, and third transistors T1, T2, and T3 may be changed to a P-type transistor.
- FIG. 4 discloses an embodiment in which the light emitting unit (EMU) is connected between the pixel circuit (PXC) and the second driving power supply (VSS), but the light emitting unit (EMU) is connected to the first driving power supply (VDD). It may be connected between the pixel circuits (PXC).
- the structure of the pixel circuit can be changed and implemented in various ways.
- the pixel circuit PXC may include a transistor element for initializing the first node N1, and/or a transistor element for controlling the emission time of the light emitting elements LD, or a voltage of the first node N1. It may additionally include other circuit elements such as a boosting capacitor for boosting.
- the horizontal direction or It is indicated as
- the vertical direction on the plane is indicated as the third direction (DR3).
- FIG. 5 is a plan view schematically showing the pixel PXL shown in FIG. 3.
- transistors electrically connected to the light emitting elements LD and signal lines electrically connected to the transistors are omitted.
- the pixel PXL not only the components included in the pixel PXL shown in FIG. 5 but also the area where the components are provided (or located) are referred to as the pixel PXL.
- the pixel PXL may be located in the pixel area PXA provided (or provided) on the substrate SUB.
- the pixel area (PXA) may include an emission area (EMA) and a non-emission area (NEA).
- the pixel PXL may include a first bank BNK1 located in the non-emission area NEA and light emitting elements LD located in the emitting area EMA.
- the first bank BNK1 is a structure that defines (or partitions) the pixel area PXA (or emission area EMA) of each of the pixel PXL and adjacent pixels PXL, for example, defining a pixel. It could be a blockage.
- the first bank BNK1 in the process of supplying (or inputting) the light emitting elements LD to the pixel PXL, is configured to each light emitting area EMA to which the light emitting elements LD are to be supplied. It may be a pixel definition film or a dam structure that defines.
- the light emitting area (EMA) of the pixel (PXL) is partitioned by the first bank (BNK1), so that the light emitting area (EMA) contains a mixed solution containing a desired amount and/or type of light emitting element (LD) (for example, Ink) may be supplied (or injected).
- the first bank BNK1 in the process of supplying a color conversion layer (see "CCL" in FIG. 6) to the pixel PXL, is configured to supply each light emitting area (CCL) to which the color conversion layer CCL is to be supplied. It may be a pixel definition film that ultimately defines EMA).
- the first bank BNK1 is configured to include at least one light blocking material and/or a reflective material (or a scattering material) to transmit light (or light) between the pixel PXL and the pixels adjacent thereto. ) can prevent light leakage defects.
- the first bank BNK1 may include a transparent material (or material). Transparent materials may include, for example, polyamides resin, polyimides resin, etc., but are not limited thereto.
- a reflective layer may be separately provided and/or formed on the first bank BNK1 to further improve the efficiency of light emitted from the pixel PXL.
- the first bank BNK1 may include at least one opening OP exposing components located below it in the pixel area PXA.
- the first bank BNK1 may include a first opening OP1 and a second opening OP2 that expose components located below the first bank BNK1 in the pixel area PXA.
- the light emitting area (EMA) of the pixel (PXL) and the first opening (OP1) of the first bank (BNK1) may correspond to each other.
- the second opening OP2 When viewed in plan, the second opening OP2 is positioned to be spaced apart from the first opening OP1 in the pixel area PXA, and may be positioned adjacent to one side, for example, the upper side, of the pixel area PXA.
- the second opening OP2 is an electrode separation area where at least one alignment electrode ALE is separated from at least one alignment electrode ALE provided in adjacent pixels PXL in the second direction DR2. It may be, but is not limited to this.
- the pixel PXL includes at least electrodes PE provided in the light emitting area EMA, light emitting elements LD electrically connected to the electrodes PE, and provided at positions corresponding to the electrodes PE. It may include a bank pattern (BNP) and alignment electrodes (ALE). As an example, the pixel PXL includes at least first and second electrodes PE1 and PE2, light emitting elements LD, and first and second alignment electrodes ALE1 and ALE2 provided in the light emitting area EMA. , may include first and second bank patterns (BNP1 and BNP2). The number, shape, size, and arrangement structure of each of the electrodes PE and/or the alignment electrodes ALE vary depending on the structure of the pixel PXL (e.g., the light emitting unit EMU). may be changed.
- BNP bank pattern
- ALE alignment electrodes
- bank patterns BNP
- alignment electrodes ALE
- light emitting elements LD
- PE electrodes
- the bank patterns BNP are provided in at least the light emitting area EMA, are spaced apart from each other in the light emitting area EMA in the first direction DR1, and each may extend along the second direction DR2.
- the bank patterns BNP may include a first bank pattern BNP1 and a second bank pattern BNP2 arranged to be spaced apart from each other in the first direction DR1.
- Each bank pattern (also called a “wall pattern”, “protrusion pattern”, “support pattern” or “wall structure”) may have a uniform width in the emission area (EMA).
- EMA emission area
- each of the first and second bank patterns BNP1 and BNP2 may have a bar shape with a predetermined width along a direction extending within the light emitting area EMA when viewed in a plan view, but is limited thereto. That is not the case.
- the bank pattern BNP is formed on the surface of each of the first and second alignment electrodes ALE1 and ALE2 to guide the light emitted from the light emitting elements LD in the image display direction (or front direction) of the display device DD.
- Each of the first and second alignment electrodes ALE1 and ALE2 may be supported to change the profile (or shape).
- Bank patterns may have the same or different widths.
- the first and second bank patterns BNP1 and BNP2 may have the same width or different widths at least in the first direction DR1 in the emission area EMA.
- Each of the first and second bank patterns BNP1 and BNP2 may partially overlap at least one alignment electrode ALE in the emission area EMA.
- the first bank pattern (BNP1) is located below the first alignment electrode (ALE1) so as to overlap one area of the first alignment electrode (ALE1)
- the second bank pattern (BNP2) is located at the bottom of the second alignment electrode (ALE1). It may be located below the second alignment electrode (ALE2) so as to overlap one area of ALE2).
- the bank pattern BNP may be a structure that accurately defines (or regulates) the alignment positions of the light emitting elements LD in the light emitting area EMA of the pixel PXL together with the alignment electrodes ALE.
- bank patterns BNP are provided below one area of each of the alignment electrodes ALE in the emission area EMA, one area of each of the alignment electrodes ALE is formed in the area where the bank patterns BNP are formed. This may protrude toward the top of the pixel (PXL). Accordingly, bank patterns BNP, which are wall structures, may be formed around the light emitting elements LD. For example, a wall structure may be formed in the light emitting area EMA to face the first and second ends EP1 and EP2 of the light emitting elements LD.
- a reflective wall structure may be formed around the light emitting elements LD. Accordingly, the light emitted from the light emitting elements LD is directed toward the top of the pixel PXL (for example, the image display direction of the display device DD), thereby improving the light emission efficiency of the pixel PXL. .
- the alignment electrodes ALE are located at least in the light emitting area EMA, are spaced apart from each other along the first direction DR1 in the light emitting area EMA, and each may extend in the second direction DR2.
- the alignment electrodes ALE may include a first alignment electrode ALE1 and a second alignment electrode ALE2 arranged to be spaced apart from each other in the first direction DR1.
- At least one of the first and second alignment electrodes ALE1 and ALE2 supplies and aligns the light emitting elements LD to the pixel area PXA during the manufacturing process of the pixel PXL (or display device DD).
- an alignment electrode for example, an alignment electrode provided to each of the adjacent pixels PXL in the second direction DR2
- another electrode for example, in the second opening OP2 (or electrode separation area) of the first bank BNK1. It can be separated from ALE)).
- one end of the first alignment electrode ALE1 is the first alignment electrode ALE1 of the pixel PXL located above the corresponding pixel PXL in the second direction DR2 within the second opening OP2. ) can be separated from.
- the first alignment electrode ALE1 may be electrically connected to the pixel circuit PXC described with reference to FIG. 4 through the first contact portion CNT1.
- the first contact portion (CNT1) is formed by removing a portion of at least one insulating layer located between the first alignment electrode (ALE1) and the pixel circuit (PXC), and the pixel is connected by the first contact portion (CNT1). Some components of the circuit (PXC) may be exposed.
- the second alignment electrode ALE2 may be electrically connected to the second power line PL2 (or the second driving power source VSS) described with reference to FIG. 4 through the second contact portion CNT2.
- the second contact portion (CNT2) is formed by removing a portion of at least one insulating layer located between the first alignment electrode (ALE1) and the second power wiring (PL2), and is formed by the second contact portion (CNT2). A portion of the second power wiring PL2 may be exposed.
- the first contact part CNT1 and the second contact part CNT2 may be located in the non-emission area NEA to overlap the first bank BNK1.
- the first and second contact units (CNT1, CNT2) may be located within the light emitting area (EMA) or within the second opening (OP2) of the first bank (BNK1). there is.
- the first alignment electrode ALE1 may be electrically connected to the first electrode PE1 through the first contact hole CH1 at the second opening OP2 of the first bank BNK1.
- the second alignment electrode ALE2 may be electrically connected to the second electrode PE2 through the second contact hole CH2 at the second opening OP2 of the first bank BNK1.
- Each of the first alignment electrode ALE1 and the second alignment electrode ALE2 receives a predetermined signal (or a predetermined signal) from an alignment pad (not shown) located in the non-display area NDA during the alignment step of the light emitting elements LD.
- alignment signal can be transmitted.
- the first alignment electrode ALE1 may receive the first alignment signal (or first alignment voltage) from the first alignment pad
- the second alignment electrode ALE2 may receive the second alignment signal from the second alignment pad.
- a signal (or second alignment voltage) may be transmitted.
- the above-described first and second alignment signals may be signals having a voltage difference and/or phase difference sufficient to align the light emitting elements LD between the first and second alignment electrodes ALE1 and ALE2. You can. At least one of the first and second alignment signals may be an alternating current signal, but is not limited thereto.
- Each alignment electrode ALE may be provided in a bar shape (or “ ⁇ ” shape) with a constant width along the second direction DR2, but is not limited thereto.
- each alignment electrode (ALE) may or may not have a curved portion in the second opening (OP2) of the first bank (BNK1), which is the non-emission area (NEA) and/or the electrode separation area, and may have a bending portion in the light emitting area.
- the shape and/or size of the remaining areas except for (EMA) is not particularly limited and may be changed in various ways.
- At least two to dozens of light emitting elements LD may be aligned and/or provided in the light emitting area EMA (or pixel area PXA), but the number of light emitting elements LD is not limited to this. no. Depending on the embodiment, the number of light emitting elements LD aligned and/or provided in the light emitting area EMA (or pixel area PXA) may vary.
- the light emitting elements LD may be respectively disposed between the first alignment electrode ALE1 and the second alignment electrode ALE2.
- each of the light emitting elements LD has a first end EP1 and a second end EP2 located at both ends (or facing each other) in the longitudinal direction, for example, in the first direction DR1. It can be included.
- a second semiconductor layer (see “13" in FIG. 1) including a p-type semiconductor layer may be located at the first end EP1 (or p-type end), and the second end EP2 ( Alternatively, a first semiconductor layer (see “11" in FIG. 1) including an n-type semiconductor layer may be located at the n-type end.
- the light emitting elements LD may be arranged to be spaced apart from each other and substantially aligned parallel to each other.
- the spacing between the light emitting elements LD is not particularly limited.
- a plurality of light-emitting devices LD may be arranged adjacently to form a group, and other plurality of light-emitting devices LD may form a group spaced apart at a certain interval and have an uneven density. They can also be aligned in one direction.
- the light emitting elements LD may be input (or supplied) to the pixel area PXA (or light emitting area EMA) through an inkjet printing method, a slit coating method, or various other methods.
- the light emitting devices LD may be mixed in a volatile solvent and input (or supplied) to the pixel area PXA through an inkjet printing method or a slit coating method.
- alignment signals corresponding to each of the first alignment electrode ALE1 and the second alignment electrode ALE2 are applied, an electric field may be formed between the first alignment electrode ALE1 and the second alignment electrode ALE2. Because of this, the light emitting elements LD may be aligned between the first alignment electrode ALE1 and the second alignment electrode ALE2. After the light emitting elements LD are aligned, the solvent is volatilized or removed by other methods to ensure that the light emitting elements LD are stably aligned between the first alignment electrode ALE1 and the second alignment electrode ALE2. It can be.
- the electrodes PE may be provided in at least the light emitting area EMA and may be provided at positions corresponding to at least one alignment electrode ALE and the light emitting element LD, respectively.
- each electrode (PE) is positioned on each alignment electrode (ALE) and the corresponding light emitting elements (LD) such that each electrode (PE) overlaps each alignment electrode (ALE) and the corresponding light emitting elements (LD). It can be formed and electrically connected to at least the light emitting devices LD.
- the electrodes PE may include a first electrode PE1 and a second electrode PE2 spaced apart from each other.
- the first electrode PE1 (“first pixel electrode” or “anode”) is formed on the first end EP1 of each of the first alignment electrode ALE1 and the light emitting elements LD to form the light emitting elements ( LD) may be electrically connected to each first end (EP1).
- the first electrode PE1 is connected to the first electrode PE1 through the first contact hole CH1 within at least the non-emission area NEA, for example, the second opening OP2 of the first bank BNK1, which is the electrode separation area. 1 may be electrically and/or physically connected to the first alignment electrode (ALE1) by directly contacting the alignment electrode (ALE1).
- the first contact hole CH1 is formed by removing a portion of at least one insulating layer located between the first electrode PE1 and the first alignment electrode ALE1, and is formed by the first contact hole CH1. 1 A portion of the alignment electrode (ALE1) may be exposed.
- the connection point (or contact point) between the first electrode PE1 and the first alignment electrode ALE1 may be located in the emission area EMA of the pixel PXL.
- the pixel circuit (PXC), the first alignment electrode (ALE1), and the first electrode (PE1) may be electrically connected through the first contact portion (CNT1) and the first contact hole (CH1).
- the first alignment electrode ALE1 and the first electrode PE1 are connected by direct contact through the first contact hole CH1, but the present invention is not limited thereto.
- the first electrode PE1 in order to prevent defects due to the material characteristics of the first alignment electrode ALE1, the first electrode PE1 is not in direct contact with the first alignment electrode ALE1 but is directly connected to the pixel circuit PXC. It may be electrically connected to the pixel circuit (PXC) by contacting it.
- the first electrode PE1 may have a bar shape extending along the second direction DR2, but is not limited thereto. Depending on the embodiment, the shape of the first electrode PE1 may be changed in various ways within the range of being stably electrically and/or physically connected to the first end EP1 of the light emitting elements LD1. Additionally, the shape of the first electrode PE1 may be changed in various ways considering the arrangement and connection relationship with the first alignment electrode ALE1 disposed below it.
- the second electrode PE2 (“second pixel electrode” or “cathode”) is formed on the second end EP2 of each of the second alignment electrode ALE2 and the light emitting elements LD to form the light emitting elements ( LD) may be electrically connected to each second end (EP2). Additionally, the second electrode PE2 may be electrically and/or physically connected to the second alignment electrode ALE2 by directly contacting the second alignment electrode ALE2 through the second contact hole CH2.
- the second contact hole CH2 is formed by removing a portion of at least one insulating layer located between the second electrode PE2 and the second alignment electrode ALE2, and is formed by removing the second contact hole CH2. A portion of the second alignment electrode ALE2 may be exposed.
- the second contact hole CH2 which is a connection point (or contact point) between the second electrode PE2 and the second alignment electrode ALE2, is connected to the first bank, which is the electrode separation area of the non-emission area NEA. It may be located in the second opening (OP2) of (BNK1), but is not limited thereto. Depending on the embodiment, the connection point (or contact point) may be located in the emission area EMA of the pixel PXL.
- the second power line PL2, the second alignment electrode ALE2, and the second electrode PE2 may be electrically connected to each other through the second contact portion CNT2 and the second contact hole CH2.
- the second alignment electrode ALE2 and the second electrode PE2 are connected by direct contact through the second contact hole CH2, but the present invention is not limited thereto.
- the second electrode (PE2) in order to prevent defects due to the material characteristics of the second alignment electrode (ALE2), is not in direct contact with the second alignment electrode (ALE2) but is connected to the second power line (PL2). It may also be electrically connected to the second power line PL2 by directly contacting it.
- the second electrode PE2 may have a bar shape extending along the second direction DR2, but is not limited thereto. Depending on the embodiment, the shape of the second electrode PE2 may be changed in various ways within the range of being stably electrically and/or physically connected to the second end EP2 of the light emitting elements LD. Additionally, the shape of the second electrode PE2 may be changed in various ways considering the arrangement and connection relationship with the second alignment electrode ALE2 disposed below it.
- FIG. 6 is a schematic cross-sectional view taken along lines I to I' of FIG. 5
- FIG. 7 is a schematic cross-sectional view taken along lines II to II' of FIG. 5
- FIG. 8 is a schematic cross-sectional view taken along lines III to III' of FIG. 5.
- FIGS. 9 and 10 are schematic enlarged views showing the EA portion of FIG. 7.
- Figure 10 shows a modified embodiment of the embodiment of Figure 9 with respect to the cover layer (CVL), etc.
- the stacked structure of the pixel is shown in a simplified manner, with each electrode shown as a single-film electrode and each insulating layer shown as a single-film insulating layer, but it is not limited thereto. .
- the pixel PXL may include a substrate SUB, a pixel circuit layer PCL, and a display element layer DPL.
- the pixel circuit layer PCL and the display element layer DPL may be arranged to overlap each other on one surface of the substrate SUB in the third direction DR3.
- the display area DA of the substrate SUB includes a pixel circuit layer PCL disposed on one surface of the substrate SUB, and a display element layer DPL disposed on the pixel circuit layer PCL. may include.
- the mutual positions of the pixel circuit layer (PCL) and the display element layer (DPL) on the substrate SUB may vary depending on the embodiment.
- the pixel circuit layer (PCL) and display element layer (DPL) are separated into separate layers and overlapped, sufficient layout space is secured to form the pixel circuit (PXC) and light emitting unit (EMU) in each layer. It can be.
- the substrate (SUB) may include a transparent insulating material to allow light to pass through.
- the substrate (SUB) may be a rigid substrate or a flexible substrate.
- Each pixel area (PXA) of the pixel circuit layer (PCL) includes circuit elements (e.g., transistors T) constituting the pixel circuit (PXC) of the corresponding pixel (PXL) and a predetermined device electrically connected to the circuit elements. Signal lines may be arranged.
- each pixel area (PXA) of the display element layer (DPL) includes alignment electrodes (ALE), light emitting elements (LD), and/or electrodes ( PE) can be placed.
- the pixel circuit layer may include at least one insulating layer in addition to circuit elements and signal lines.
- the pixel circuit layer includes a buffer layer (BFL), a gate insulating layer (GI), an interlayer insulating layer (ILD), and a passivation layer sequentially stacked on the substrate SUB along the third direction DR3. (PSV), and a via layer (VIA).
- the buffer layer BFL may be disposed entirely on the substrate SUB.
- the buffer layer BFL can prevent impurities from diffusing into the transistors T included in the pixel circuit PXC.
- the buffer layer (BFL) may be an inorganic insulating film containing an inorganic material.
- the buffer layer (BFL) may include at least one of silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ), and aluminum oxide (AlO x ).
- the buffer layer (BFL) may be provided as a single layer, but may also be provided as a multilayer, at least a double layer or more. When the buffer layer (BFL) is provided as a multilayer, each layer may be formed of the same material or may be formed of different materials.
- the buffer layer BFL may be omitted depending on the material and process conditions of the substrate SUB.
- the gate insulating layer (GI) may be entirely disposed on the buffer layer (BFL).
- the gate insulating layer GI may include the same material as the above-described buffer layer BFL, or may include a material suitable for (or selected from) materials exemplified as constituent materials of the buffer layer BFL.
- the gate insulating layer GI may be an inorganic insulating film containing an inorganic material.
- the interlayer insulating layer (ILD) may be provided and/or formed entirely on the gate insulating layer (GI).
- the interlayer insulating layer (ILD) may include the same material as the buffer layer (BFL), or may include one or more materials suitable (or selected) from the materials exemplified as constituent materials of the buffer layer (BFL).
- the passivation layer (PSV) may be provided and/or formed entirely on the interlayer dielectric layer (ILD).
- the passivation layer (PSV) may include the same material as the buffer layer (BFL) or may include one or more materials suitable (or selected) from the materials exemplified as constituent materials of the buffer layer (BFL).
- the via layer (VIA) may be provided and/or formed entirely on the passivation layer (PSV).
- the via layer (VIA) may be an inorganic insulating film containing an inorganic material or an organic insulating film containing an organic material.
- the inorganic insulating film may include, for example, at least one of silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and aluminum oxide (AlO x ).
- Organic insulating films include, for example, polyacrylates resin, epoxy resin, phenolic resin, polyamides resin, polyimides rein, and unsaturated poly. At least one of unsaturated polyesters resin, poly-phenylene ethers resin, poly-phenylene sulfides resin, and benzocyclobutene resin. It can be included.
- the via layer (VIA) may be used as a flattening layer that alleviates steps generated by the components of the pixel circuit (PXC) located below the pixel circuit layer (PCL).
- the pixel circuit layer (PCL) may include at least one conductive layer disposed between the above-described insulating layers.
- the pixel circuit layer (PCL) includes a first conductive layer disposed between the substrate (SUB) and the buffer layer (BFL), a second conductive layer disposed on the gate insulating layer (GI), and an interlayer insulating layer (ILD). It may include a third conductive layer disposed on the passivation layer (PSV) and a fourth conductive layer disposed on the passivation layer (PSV).
- the insulating layers and conductive layers are not limited to the above-described embodiment, and depending on the embodiment, other insulating layers and other conductive layers in addition to the insulating layer and the conductive layers may be provided in the pixel circuit layer (PCL). .
- the first conductive layer is formed of a single film containing copper (Cu), molybdenum (Mo), tungsten (W), aluminum neodymium (AlNd), titanium (Ti), aluminum (Al), and silver (Ag), or It is formed as a single film made of a single or mixture selected from the group consisting of alloys, or is made of low-resistance materials such as molybdenum (Mo), titanium (Ti), copper (Cu), aluminum (Al), or silver ( It can be formed as a double-layer or multi-layer structure containing Ag).
- Each of the second to fourth conductive layers may include the same material as the first conductive layer, or may include one or more materials suitable from those exemplified as constituent materials of the first conductive layer, but is not limited thereto.
- the pixel circuit PXC disposed on the pixel circuit layer PCL may include at least one transistor T.
- the pixel circuit PXC may include a first transistor T1 and a second transistor T2 electrically connected to the first transistor T1.
- the pixel circuit PXC may further include circuit elements that perform other functions in addition to the first transistor T1 and the second transistor T2.
- the first transistor (T1) may have the same configuration as the first transistor (T1) described with reference to FIG. 4, and the second transistor (T2) may have the same configuration as the second transistor (T2) described with reference to FIG. 4. It can be.
- the first transistor T1 and the second transistor T2 are collectively referred to as transistor T or transistors T.
- the transistors T may include a semiconductor pattern and a gate electrode GE that overlaps at least a portion of the semiconductor pattern in the third direction DR3.
- the semiconductor pattern may include a channel area (ACT), a first contact area (SE), and a second contact area (DE).
- the first contact area SE may be a source area
- the second contact area DE may be a drain area.
- the gate electrode GE may be provided and/or formed on the gate insulating layer GI to correspond to the channel region ACT of the semiconductor pattern.
- the gate electrode GE may be a second conductive layer located between the gate insulating layer GI and the interlayer insulating layer ILD.
- the gate electrode (GE) may be provided on the gate insulating layer (GI) and overlap the channel region (ACT) of the semiconductor pattern.
- a semiconductor pattern may be provided and/or formed on the buffer layer (BFL).
- the channel area ACT, first contact area SE, and second contact area DE may be a semiconductor pattern made of poly silicon, amorphous silicon, or oxide semiconductor.
- the channel region (ACT), the first contact region (SE), and the second contact region (DE) may be formed of a semiconductor layer that is not doped with an impurity or is doped with an impurity.
- the first contact area SE and the second contact area DE may be made of a semiconductor layer doped with impurities
- the channel area ACT may be made of a semiconductor layer not doped with impurities.
- an impurity for example, an n-type impurity may be used, but is not limited thereto.
- the channel region ACT may overlap the gate electrode GE of the transistor T in the third direction DR3.
- the channel region (ACT) of the first transistor (T1) may overlap the gate electrode (GE) of the first transistor (T1)
- the channel region (ACT) of the second transistor (T2) may overlap the gate electrode (GE) of the first transistor (T1). It may overlap with the gate electrode (GE) of (T2).
- the first contact area SE of the first transistor T1 may be connected to (or in contact with) one end of the channel area ACT of the first transistor T1. Additionally, the first contact area SE of the first transistor T1 may be connected to the bridge pattern BRP through the first connection member TE1.
- the first connection member TE1 may be provided and/or formed on the interlayer insulating layer ILD.
- the first connection member TE1 may be composed of a third conductive layer.
- One end of the first connection member (TE1) is connected to the first contact area (SE) of the first transistor (T1) electrically and /or can be physically connected.
- the other end of the first connection member TE1 may be electrically and/or physically connected to the bridge pattern BRP through a contact hole penetrating the passivation layer PSV located on the interlayer insulating layer ILD.
- the bridge pattern (BRP) may be provided and/or formed on the passivation layer (PSV).
- the bridge pattern (BRP) may be composed of a fourth conductive layer.
- One end of the bridge pattern (BRP) may be connected to the first contact area (SE) of the first transistor (T1) through the first connection member (TE1).
- the other end of the bridge pattern (BRP) is connected to the lower metal layer (BML) through a contact hole sequentially passing through the passivation layer (PSV), interlayer insulating layer (ILD), gate insulating layer (GI), and buffer layer (BFL). may be electrically and/or physically connected to.
- the lower metal layer BML and the first contact area SE of the first transistor T1 may be electrically connected through the bridge pattern BRP and the first connection member TE1.
- the bridge pattern BRP may be electrically connected to a portion of the display element layer DPL, for example, the first alignment electrode ALE1, through a contact hole penetrating the via layer VIA.
- the lower metal layer BML may be a first conductive layer provided on the substrate SUB.
- the lower metal layer (BML) is electrically connected to the first transistor (T1) and can expand the driving range of a predetermined voltage supplied to the gate electrode (GE) of the first transistor (T1).
- the lower metal layer BML may be electrically connected to the first contact area SE of the first transistor T1 to stabilize the channel area ACT of the first transistor T1. Additionally, since the lower metal layer BML is electrically connected to the first contact area SE of the first transistor T1, floating of the lower metal layer BML can be prevented.
- the second contact area DE of the first transistor T1 may be connected to (or in contact with) the other end of the channel area ACT of the first transistor T1. Additionally, the second contact area DE of the first transistor T1 may be connected to (or in contact with) the second connection member TE2.
- the second connection member TE2 may be provided and/or formed on the interlayer insulating layer ILD.
- the second connection member TE2 may be a third conductive layer.
- One end of the second connection member (TE2) is electrically and/or connected to the second contact area (DE) of the first transistor (T1) through a contact hole penetrating the interlayer insulating layer (ILD) and the gate insulating layer (GI). Can be physically connected.
- the first contact area SE of the second transistor T2 may be connected to (or in contact with) one end of the channel area ACT of the second transistor T2. Additionally, although not directly shown in the drawing, the first contact area SE of the second transistor T2 may be electrically connected to the gate electrode GE of the first transistor T1. For example, the first contact area SE of the second transistor T2 may be electrically connected to the gate electrode GE of the first transistor T1 through another first connection member TE1.
- the other first connection member TE1 may be provided and/or formed on the interlayer insulating layer ILD. For example, the other first connection member TE1 may be composed of a third conductive layer.
- the second contact area DE of the second transistor T2 may be connected to (or in contact with) the other end of the channel area ACT of the second transistor T2. Additionally, although not directly shown in the drawing, the second contact area DE of the second transistor T2 may be electrically connected to the data line Dj. For example, the second contact area DE of the second transistor T2 may be electrically connected to the data line Dj through another second connection member TE2.
- the second connection member TE2 may be provided and/or formed on the interlayer insulating layer (ILD). As an example, the second connection member TE2 may be composed of a third conductive layer.
- the transistors T are thin film transistors with a top gate structure
- the present invention is not limited to this, and the structures of the transistors T may be changed in various ways.
- a passivation layer may be provided and/or formed on the transistors (T) and the first and second connection members (TE1 and TE2).
- the pixel circuit layer (PCL) may include a predetermined power wiring provided and/or formed on the passivation layer (PSV).
- the pixel circuit layer (PCL) may include a second power line (PL2) disposed on the passivation layer (PSV).
- the second power line PL2 may be composed of a fourth conductive layer.
- the voltage of the second driving power source VSS may be applied to the second power line PL2.
- the pixel circuit layer (PCL) may further include the first power line PL1 described with reference to FIG. 4 .
- the first power wiring PL1 is formed through the same process as the second power wiring PL2 and is provided on the same layer as the second power wiring PL2, or is formed through a different process from the second power wiring PL2. It may be provided on a different layer from the second power wiring PL2. However, it is not limited to this.
- a via layer (VIA) may be provided and/or formed on the bridge pattern (BRP) and the second power line (PL2).
- the via layer (VIA) may be partially opened to include a first contact portion (CNT1) exposing a portion of the bridge pattern (BRP) and a second contact portion (CNT2) exposing a portion of the second power line (PL2). You can.
- a display element layer (DPL) may be provided and/or formed on the via layer (VIA).
- the display device layer DPL may include bank patterns BNP, alignment electrodes ALE, first bank BNK1, light emitting devices LD, and electrodes PE.
- Bank patterns (BNP) may be located on the via layer (VIA).
- the bank patterns BNP may protrude in the third direction DR3 on one surface of the via layer VIA. Accordingly, one area of the alignment electrodes ALE disposed on the bank patterns BNP may protrude in the third direction DR3 (or the thickness direction of the substrate SUB).
- the bank pattern (BNP) may include an inorganic insulating film containing an inorganic material or an organic insulating film containing an organic material.
- the bank pattern (BNP) may include a single-layer organic insulating film and/or a single-layer organic insulating film, but is not limited thereto.
- the bank pattern (BNP) may be provided in the form of a multilayer in which at least one organic insulating film and at least one inorganic insulating film are stacked.
- the material of the bank pattern (BNP) is not limited to the above-described embodiment, and depending on the embodiment, the bank pattern (BNP) may include a conductive material (or material).
- the bank pattern (BNP) may include a first bank pattern (BNP1) and a second bank pattern (BNP2). At least in the light emitting area EMA, the first bank pattern BNP1 is located below the first alignment electrode ALE1 in the third direction DR3 and overlaps the first alignment electrode ALE1, and is located at least in the light emitting area EMA. ), the second bank pattern (BNP2) is located below the second alignment electrode (ALE2) in the third direction (DR3) and may overlap the second alignment electrode (ALE2).
- the bank pattern BNP may have a trapezoidal cross-section whose width becomes narrower as it moves upward from the surface (eg, upper surface) of the via layer VIA along the third direction DR3, but is limited thereto. That is not the case.
- the bank pattern (BNP) has a cross section such as a semi-elliptical shape or a semi-circular (or hemispherical) shape whose width becomes narrower as it moves upward from one side of the via layer (VIA) along the third direction (DR3). You can have it.
- the shape of the bank pattern BNP is not limited to the above-described embodiment and can be changed in various ways within a range that can improve the efficiency of light emitted from each light emitting element LD. Additionally, depending on the embodiment, at least one of the bank patterns (BNP) may be omitted or its position may be changed.
- Bank pattern (BNP) can be used as a reflective member.
- the bank pattern (BNP) together with the alignment electrode (ALE) disposed on top, guides the light emitted from each light emitting element (LD) toward the image display direction of the display device (DD) to display the image of the pixel (PXL). It can be used as a reflective member to improve light output efficiency.
- Alignment electrodes ALE may be located on the bank pattern BNP.
- the alignment electrodes ALE may be disposed on the same plane and have the same thickness in the third direction DR3. Alignment electrodes ALE may be formed simultaneously in the same process.
- the alignment electrodes ALE may be made of a material having reflectivity to allow light emitted from the light emitting elements LD to travel in the image display direction (or front direction) of the display device DD.
- the alignment electrodes ALE may be made of a conductive material (or material).
- the conductive material may include an opaque metal suitable for reflecting light emitted from the light emitting elements LD in the image display direction of the display device DD.
- Opaque metals include, for example, silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), and iridium ( It may include metals such as Ir), chromium (Cr), titanium (Ti), and alloys thereof.
- the material of the alignment electrodes ALE is not limited to the above-described embodiment.
- the alignment electrodes ALE may include a transparent conductive material (or material).
- Transparent conductive materials (or materials) include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO x ), and indium gallium zinc oxide.
- the alignment electrodes ALE include a transparent conductive material (or material), a separate conductor made of an opaque metal is used to reflect the light emitted from the light emitting elements LD in the image display direction of the display device DD. Layers may be added.
- the materials of the alignment electrodes ALE are not limited to the materials described above.
- Each of the alignment electrodes may be provided and/or formed as a single layer, but is not limited thereto.
- each of the alignment electrodes ALE may be provided and/or formed as a multilayer layer of at least two materials selected from metals, alloys, conductive oxides, and conductive polymers.
- Each of the alignment electrodes ALE minimizes distortion due to signal delay when transmitting a signal (or voltage) to both ends of each light emitting element LD, for example, the first and second ends EP1 and EP2. In order to do this, it may be formed as a multi-layer of at least a double layer or more.
- each of the alignment electrodes ALE covers at least one layer of a reflective electrode layer, at least one transparent electrode layer disposed on top and/or below the reflective electrode layer, and an upper part of the reflective electrode layer and/or the transparent electrode layer. It may be formed as a multilayer that selectively further includes at least one of at least one conductive capping layer.
- the alignment electrodes ALE are made of a conductive material having reflectivity, at both ends of each of the light emitting elements LD, for example, the first and second ends EP1 and EP2.
- the emitted light may proceed further in the image display direction of the display device DD.
- the first alignment electrode (ALE1) may be electrically connected to the first transistor (T1) of the pixel circuit layer (PCL) through the first contact portion (CNT1)
- the second alignment electrode (ALE2) may be electrically connected to the second contact portion ( It can be electrically connected to the second power line PL2 of the pixel circuit layer (PCL) through CNT2).
- a first insulating layer may be provided and/or formed on the alignment electrodes (ALE).
- the first insulating layer INS1 may be disposed on the alignment electrodes ALE and the via layer VIA.
- the first insulating layer INS1 may be partially open to expose components located underneath the first insulating layer INS1, at least in the non-emission area NEA.
- the first insulating layer INS1 includes a first contact hole CH1 exposing a portion of the first alignment electrode ALE1 by removing at least one area from the non-emission area NEA, and at least the non-emission area NEA.
- Another area in (NEA) may be removed to partially open the second contact hole CH2 to expose a portion of the second alignment electrode ALE2.
- At least the non-emission area (NEA) may be the second opening (OP2) of the first bank (BNK1), which is an electrode separation area, but is not limited thereto.
- the first insulating layer INS1 may be formed as an inorganic insulating film made of an inorganic material.
- the first insulating layer INS1 may be made of an inorganic insulating film suitable for protecting the light emitting devices LD from the pixel circuit layer PCL.
- the first insulating layer (INS1) includes at least one of silicon nitride (SiN x ), silicon oxide (SiO x ), and silicon oxynitride (SiO x N y ), or a metal such as aluminum oxide (AlO x ). It may contain at least one of oxides.
- the first insulating layer INS1 may have a profile (or surface) corresponding to the profiles of the components located underneath it.
- an empty gap may exist between each of the light emitting devices LD and the first insulating layer INS1.
- the first insulating layer INS1 may be formed as an organic insulating film made of an organic material.
- the first insulating layer (INS1) may be provided as a single layer or a multilayer.
- the first insulating layer (INS1) is distributed bragg reflectors (distributed bragg reflectors) in which first inorganic layers and second inorganic layers having different refractive indices are alternately stacked. DBR) structure may also be provided.
- the first insulating layer INS1 may be disposed entirely over the emission area EMA and the non-emission area NEA of each pixel PXL, but is not limited thereto. Depending on the embodiment, the first insulating layer INS1 may be located only in a specific area of each pixel PXL, for example, the emission area EMA.
- the first bank (BNK1) may be located on the first insulating layer (INS1).
- the first bank BNK1 may be disposed on the first insulating layer INS1 at least in the non-emission area NEA, but is not limited thereto.
- the first bank (BNK1) is a pixel formed between adjacent pixels (PXL) to surround the emission area (EMA) of each pixel (PXL) and partitioning (or defining) the emission area (EMA) of the corresponding pixel (PXL).
- a membrane of justice can be formed.
- the first bank BNK1 applies a solution (or ink) mixed with the light emitting elements LD to the light emitting area of the adjacent pixels PXL. It may be a dam structure that prevents the solution from flowing into the EMA or controls the supply of a certain amount of solution to each light emitting area (EMA).
- first bank (BNK1) and bank pattern (BNP) may be formed through different processes and provided in different layers, but are not limited thereto.
- first bank BNK1 and the bank pattern BNP may be formed through different processes and provided on the same layer, or may be formed through the same process and provided on the same layer.
- Light emitting elements LD may be supplied and aligned in the light emitting area EMA of the pixel PXL where the first insulating layer INS1 and the first bank BNK1 are formed.
- light-emitting elements LD are supplied (or input) to the light-emitting area EMA through an inkjet printing method, etc., and the light-emitting elements LD generate a predetermined signal applied to each of the alignment electrodes ALE.
- the alignment electrodes ALE may be aligned by an electric field formed by (or an alignment signal).
- the light emitting elements LD may be aligned on the first insulating layer INS1 between the first alignment electrode ALE1 and the second alignment electrode ALE2.
- a second insulating layer INS2 (or insulating pattern) may be disposed on each of the light emitting elements LD.
- the second insulating layer INS2 is located on the light emitting devices LD and partially covers the outer peripheral surface (or surface) of each light emitting device LD to form a first end EP1 of each light emitting device LD. and the second end EP2 may be exposed to the outside.
- the second insulating layer INS2 may include an inorganic insulating film containing an inorganic material or an organic insulating film.
- the second insulating layer INS2 may include an inorganic insulating film suitable for protecting the active layer 12 of each light emitting device LD from external oxygen and moisture.
- the second insulating layer (INS2) is an organic insulating film containing an organic material. It may be configured.
- the second insulating layer (INS2) may be composed of a single layer or a multilayer.
- the empty gap exists between the first insulating layer (INS1) and the light emitting elements (LD) before forming the second insulating layer (INS2)
- the empty gap is formed in the process of forming the second insulating layer (INS2). It may be filled with the second insulating layer (INS2).
- INS2 a second insulating layer (INS2) on the aligned light emitting elements (LD) in the light emitting area (EMA) of each pixel (PXL), the light emitting elements (LD) can be prevented from leaving the aligned position. there is.
- Electrodes PE may be formed on both ends of the light emitting elements LD that are not covered by the second insulating layer INS2, for example, on the first and second ends EP1 and EP2. .
- the electrodes PE may include a first electrode PE1 and a second electrode PE2.
- the first electrode PE1 may be disposed on the first end EP1 of each of the light emitting elements LD and the first insulating layer INS1 on the first alignment electrode ALE1. .
- the first electrode PE1 may be connected to the first alignment electrode ALE1 through the first contact hole CH1 of the first insulating layer INS1.
- the second electrode PE2 may be connected to the second alignment electrode ALE2 through the second contact hole CH2 of the first insulating layer INS1.
- the first electrode PE1 may be directly disposed on the first end EP1 of the light emitting elements LD and may be in contact with the first end EP1 of the light emitting elements LD.
- the second electrode PE2 may be directly disposed on the second end EP2 of the light emitting elements LD and may be in contact with the second end EP2 of the light emitting elements LD.
- the first electrode PE1 and the second electrode PE2 may be formed through different processes.
- a third insulating layer (INS3) may be disposed on the first electrode (PE1), and a second electrode (PE2) may be disposed on the third insulating layer (INS3).
- the third insulating layer (INS3) is located on the first electrode (PE1) and covers the first electrode (PE1) (or does not expose the first electrode (PE1) to the outside) to form the first electrode (PE1). Corrosion of PE1) can be prevented.
- the third insulating layer INS3 may include an inorganic insulating film made of an inorganic material or an organic insulating film made of an organic material.
- the third insulating layer (INS3) includes at least one of silicon nitride (SiN x ), silicon oxide (SiO x ), and silicon oxynitride (SiO x N y ), or aluminum oxide (AlO x ). It may include at least one metal oxide, but is not limited thereto. Additionally, the third insulating layer INS3 may be formed as a single layer or a multilayer.
- the third insulating layer (INS3) is disposed between the first electrode (PE1) and the second electrode (PE2), the first electrode (PE1) and the second electrode (PE2) are connected to the third insulating layer (INS3). Since they can be stably separated by INS3, electrical stability between the first and second ends EP1 and EP2 of the light emitting elements LD can be secured.
- the electrodes PE may each be made of various transparent conductive materials.
- the electrodes (PE) are each made of indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), and zinc tin oxide ( It contains at least one of various transparent conductive materials, including ZTO) or gallium tin oxide (GTO), and may be implemented to be substantially transparent or translucent to satisfy a predetermined light transmittance. Accordingly, the light emitted from the first and second ends EP1 and EP2 of the light emitting elements LD passes through the electrodes PD to the outside of the display device DD (or display panel DP). can be released as
- a cover layer may be located on the above-described electrodes (PE) and the third insulating layer (INS3).
- the cover layer CVL may be a fourth insulating layer INS4 that protects the electrodes PE and flattens the top surface of the display element layer DPL.
- the cover layer (CVL) uses the difference in refractive index to change the path of light lost among the light (or light) emitted from the color conversion layer (CCL) to the front direction (or the image display direction of the display device (DD)). The brightness of the front light can be improved.
- the cover layer (CVL) recycles light (for example, blue-based light) that does not react with the color conversion layer (CCL) to react with the color conversion layer (CCL), thereby increasing the output luminance of the color conversion layer (CCL). can be increased.
- the cover layer (CVL) may be configured to selectively reflect light in a specific wavelength range.
- the cover layer (CVL) may be configured to pass light of a first wavelength among light traveling toward the back of the color conversion layer (CCL) and reflect light of a different wavelength from the first wavelength.
- the cover layer (CVL) passes blue-based light traveling from the color conversion layer (CCL) toward its back side, for example, toward the light-emitting elements (LD), and green-based light other than the blue-based light. Light and/or red light may be reflected by the color conversion layer (CCL).
- the cover layer CVL may include at least one sub-insulating layer including a first layer FL and a second layer SL that are sequentially stacked and have different refractive indices.
- the cover layer CVL may include first, second, third, and fourth sub-insulating layers SINS1, SINS2, SINS3, and SINS4, as shown in FIG. 9.
- the first, second, third, and fourth sub-insulating layers (SINS1, SINS2, SINS3, and SINS4) each have a first layer (FL) and a second layer sequentially stacked along the third direction (DR3). (SL) may be included.
- the first layer FL may include a first inorganic layer having a first refractive index
- the second layer SL may include a second inorganic layer having a second refractive index different from the first refractive index.
- the first refractive index may be smaller than the second refractive index.
- the first layer (FL) may be a first inorganic layer including silicon oxide (SiO x )
- the second layer (SL) may be a second inorganic layer including silicon nitride (SiN x ).
- the first layer (FL) may be a first inorganic layer containing silicon oxide ( SiO It may be a second inorganic layer containing (SiN x ).
- the first layer (FL) may have a thickness of approximately 1060 ⁇ 5%
- the second layer (SL) may have a thickness of approximately 900 ⁇ 5%, but are not limited thereto.
- the cover layer CVL described above may include a distributed Bragg reflector structure in which a first layer FL having a first refractive index and a second layer SL having a second refractive index are alternately and repeatedly stacked.
- the cover layer CVL may include at least one sub-insulating layer formed by stacking a first layer FL with a first refractive index and a second layer SL with a second refractive index.
- the first refractive index may be higher than the second refractive index.
- the first layer (FL) may be a first inorganic layer including silicon nitride (SiN x ), and the second layer (SL) may be a second inorganic layer including silicon oxide (SiO x ).
- the cover layer (CVL) is sequentially stacked and is illustrated to include at least one sub-insulating layer including a first layer (FL) and a second layer (SL) having different refractive indices, but is limited to this. It doesn't work.
- the cover layer (CVL) includes at least one first layer (FL), a second layer (SL), and a third layer (TL) having a different refractive index from the adjacent layer as shown in FIG. 10. It may also include the above sub-insulating layers (SINS1, SINS2, and SINS3).
- the cover layer CVL includes a first sub-insulating layer SINS1, a second sub-insulating layer SINS2, and a third sub-insulating layer SINS1 sequentially stacked on the electrodes PE2 along the third direction DR3. It may include an insulating layer (SINS3).
- the first layer (FL) includes a first inorganic layer having a first refractive index
- the second layer (SL) includes a second inorganic layer having a second refractive index different from the first refractive index
- the third layer (TL) may include a third inorganic film having a third refractive index different from the second refractive index.
- the third refractive index may be the same as the first refractive index, but is not limited thereto.
- the first layer (FL) may be a first inorganic layer containing silicon oxide (SiO x ), and the second layer (SL) may be a silicon nitride (SiN x ) may be a second inorganic layer, and the third layer TL may be a third inorganic layer containing silicon oxide (SiO x ).
- the first layer (FL) may be a first inorganic layer including silicon nitride (SiN x ), and the second layer (SL) may be silicon It may be a second inorganic layer containing oxide (SiO x ), and the third layer (TL) may be a third inorganic layer containing silicon nitride (SiN x ).
- the cover layer (CVL) shown in FIG. 10 includes a first layer (FL) having a first refractive index, a second layer (SL) having a second refractive index, and a third layer (TL) having a third refractive index alternating with each other.
- the cover layer (CVL) is a sub layer formed by stacking a first layer (FL) with a first refractive index, a second layer (SL) with a second refractive index, and a third layer (TL) with a third refractive index. It may include at least one insulating layer.
- the above-described cover layer (CVL) may transmit part of the light traveling from the color conversion layer (CCL) toward its back and reflect the rest.
- the first layer (FL) and the second layer (SL) having different refractive indices are alternately stacked to form the cover layer (CVL), thereby repeatedly forming a difference in refractive index within the cover layer (CVL).
- Light incident on the cover layer (CVL) may have different transmittances depending on the angle of incidence.
- the reflectance of light reflected from the cover layer (CVL) can be adjusted by adjusting the material, thickness, and/or number of stacks included in the stacked first layer (FL) and second layer (SL).
- the thickness of the first layer (FL) and the second layer (SL) may be adjusted according to the wavelength and refractive index of the light.
- the refractive index of the laminated layer (inorganic film) is n and the wavelength of the light to be reflected is ⁇
- low refractive index layers (or high refractive index layers) and high refractive index layers (or low refractive layers) of ⁇ /4n thickness are alternately stacked, a specific Light in the wavelength ( ⁇ ) region can be effectively reflected.
- the cover layer CVL may have a first thickness d1 in the third direction DR3.
- the first thickness d1 may be about 2 ⁇ m.
- the first thickness d1 may be the separation distance between the light emitting elements LD and the color conversion layer CCL.
- a color conversion layer (CCL) and a second bank (BNK2) may be located on the cover layer (CVL).
- the color conversion layer (CCL) is located on the cover layer (CVL) of the emission area (EMA) of the pixel (PXL), and the second bank (BNK2) is located on the cover layer (CVL) of the non-emission area (NEA) of the pixel (PXL).
- CVL ).
- the second bank BNK2 may be provided and/or formed on the cover layer CVL on the first bank BNK1 in the non-emission area NEA.
- the second bank BNK2 may be a dam structure that surrounds the light emitting area EMA of the pixel PXL and defines the light emitting area EMA by defining a location where the color conversion layer CCL is to be supplied.
- the second bank (BNK2) may include a light blocking material.
- the second bank (BNK2) may be a black matrix.
- the second bank BNK2 is configured to include at least one light blocking material and/or a reflective material to direct light emitted from the color conversion layer CCL to proceed in the image display direction of the display device DD. As a result, the light output efficiency of the color conversion layer (CCL) can be improved.
- the color conversion layer (CCL) may be formed on the cover layer (CVL) of each pixel (PXL) within the emission area (EMA) surrounded by the second bank (BNK2).
- the color conversion layer (CCL) may include color conversion particles (QD) corresponding to characteristic colors.
- the color conversion layer (CCL) is a color conversion particle that converts the first color light emitted from the light emitting elements (LD) into a second color light (or a specific color) different from the first color light. (QD) may be included.
- the color conversion layer (CCL) of the pixel (PXL) converts the first color light emitted from the light emitting elements (LD) into the second color light ( Alternatively, it may include color conversion particles (QDs) of red quantum dots that convert into red light.
- QDs color conversion particles
- the color conversion layer (CCL) of the pixel (PXL) converts the first color light emitted from the light emitting elements (LD) into the second color light ( Alternatively, it may include color conversion particles (QDs) of green quantum dots that convert into green light.
- QDs color conversion particles
- the color conversion layer (CCL) of the pixel (PXL) converts the first color light emitted from the light emitting elements (LD) into the second color light ( As an example, it may include color conversion particles (QDs) of blue quantum dots that convert to blue light.
- QDs color conversion particles
- the pixel (PXL) is a blue pixel (or blue sub-pixel)
- light scattering particles (SCT) or scatterers
- SCT or scatterers
- the pixel PXL may include a light scattering layer including light scattering particles (SCT).
- SCT light scattering particles
- the light scattering layer described above may be omitted depending on the embodiment.
- a transparent polymer may be provided instead of the color conversion layer CCL.
- An upper substrate (U_SUB) may be disposed on the color conversion layer (CCL) and the second bank (BNK2).
- the upper substrate (U_SUB) can be combined with the display element layer (DPL) through an intermediate layer (CTL), etc.
- the intermediate layer (CTL) may be a transparent adhesive layer (or adhesive layer) to strengthen the adhesion between the display device layer (DPL) and the upper substrate (U_SUB), for example, an optically clear adhesive layer (Otically Clear Adhesive), but is limited thereto. It doesn't work.
- the middle layer (CTL) may be a refractive index conversion layer for improving the luminance of the light emitted from the pixel (PXL) by converting the angle of light emitted from the color conversion layer (CCL) and traveling to the upper substrate (U_SUB).
- the intermediate layer (CTL) may include a filler made of an insulating material with insulating and adhesive properties.
- the upper substrate (U_SUB) may include a base layer (BSL), a color filter layer (CFL), and a capping layer (CPL).
- BSL base layer
- CFL color filter layer
- CPL capping layer
- the base layer (BSL) may be a rigid substrate or a flexible substrate, and its material or physical properties are not particularly limited.
- the base layer BSL may be made of the same material as the substrate SUB, or may be made of a different material from the substrate SUB.
- the color filter layer (CFL) may be disposed on one side of the base layer (BSL) to face the display element layer (DPL).
- the color filter layer (CFL) may include a color filter corresponding to each pixel (PXL).
- the color filter layer (CFL) includes a first color filter (CF1) disposed on the color conversion layer (CCL) of one pixel (PXL) (hereinafter referred to as “first pixel”), A second color filter (CF2) disposed on the color conversion layer of an adjacent pixel (hereinafter referred to as “second pixel”) adjacent to (PXL), and an adjacent pixel (hereinafter referred to as “third pixel”) adjacent to the second pixel.
- CF3 third color filter
- the first, second, and third color filters CF1, CF2, and CF3 are arranged to overlap each other in the third direction DR3 in the non-emission area NEA to prevent optical interference between adjacent pixels PXL. It can be used as a light blocking member to block.
- Each of the first, second, and third color filters CF1, CF2, and CF3 may include a color filter material that selectively transmits light converted and emitted from the corresponding color conversion layer.
- the first color filter (CF1) may be a red color filter
- the second color filter (CF2) may be a green color filter
- the third color filter (CF3) may be a blue color filter, but is limited thereto. It doesn't work.
- a capping layer (CPL) may be disposed on the color filter layer (CFL).
- the capping layer (CPL) is located on the color filter layer (CFL) and covers the color filter layer (CFL) to protect the color filter layer (CFL).
- the capping layer (CPL) may be an inorganic film containing an inorganic material or an organic film containing an organic material.
- a cover layer (CVL) in which a first layer (FL) having a first refractive index and a second layer (SL) having a second refractive index are alternately and repeatedly stacked is formed using electrodes (PE1, PE2). ) and the color conversion layer (CCL), by using the difference in refractive index between the first layer (FL) and the second layer (SL), the light traveling in the back direction of the color conversion layer (CCL) is converted into color.
- CVL cover layer in which a first layer (FL) having a first refractive index and a second layer (SL) having a second refractive index are alternately and repeatedly stacked is formed using electrodes (PE1, PE2). ) and the color conversion layer (CCL)
- the difference in refractive index between the first layer (FL) and the second layer (SL) the light traveling in the back direction of the color conversion layer (CCL) is converted into color.
- PXL light output efficiency of the pixel
- the cover layer CVL having the first thickness d1 is disposed between the light emitting devices LD and the color conversion layer CCL, thereby converting the light emitting devices LD and the color conversion layer CCL.
- FIGS. 11 and 12 schematically show a pixel (PXL) according to an embodiment, and are schematic cross-sectional views corresponding to lines II to II' of FIG. 5.
- the display element layer (DPL) of the pixel (PXL) may include an additional insulating layer (ADINS).
- ADINS additional insulating layer
- the additional insulating layer ADINS may be a fifth insulating layer INS5 disposed between the electrodes PE and the cover layer CVL.
- the additional insulating layer (ADINS) may include an organic layer.
- the additional insulating layer (ADINS) may be a flattening layer that alleviates the steps caused by the components located below, for example, the electrodes (PE), the third insulating layer (INS3), and the first bank (BNK1). there is.
- the cover layer (CVL) located on top of the additional insulating layer (ADINS) may have a flatter surface. In this case, the reflectance of light reflected from the cover layer (CVL) to the color conversion layer (CCL) may be further improved.
- the additional insulating layer ADINS described above may have a second thickness d2 in the third direction DR3.
- the second thickness d2 may be smaller than the first thickness d1 of the cover layer CVL described with reference to FIGS. 6 to 10.
- the second thickness d2 may be approximately 1.0 ⁇ m to 1.3 ⁇ m, but is not limited thereto.
- the additional insulating layer (ADINS) may have a refractive index similar to that of the color conversion layer (CCL) and may have a lower refractive index than the cover layer (CVL).
- the additional insulating layer ADINS may have a lower refractive index than a layer with a higher refractive index among the first and second layers FL and SL of the cover layer CVL described with reference to FIG. 9 .
- the second layer (SL) has a higher refractive index than the first layer (FL)
- the additional insulating layer (ADINS) may have a lower refractive index than the second layer (SL).
- ADINS additional insulating layer
- CVL cover layer
- CCL color conversion layer
- the additional insulating layer (ADINS) is placed below the cover layer (CVL), the gap between the light emitting elements (LD) and the color conversion layer (CCL) is further secured to prevent deterioration of the color conversion layer (CCL). You can.
- the additional insulating layer may include an inorganic layer.
- the additional insulating layer (ADINS) is designed to have a thickness (or diameter) of 0.6 ⁇ m or more, for example, of the light emitting elements (LD) in order to prevent total reflection of light emitted from the side of the light emitting elements (LD). It can be.
- the display element layer DPL of the pixel PXL may include a cover pattern CVP disposed between the electrodes PE and the color conversion layer CCL. there is.
- the cover pattern CVP may be disposed on the third insulating layer INS3 on the first electrode PE1 at least in the emission area EMA.
- the cover pattern (CVP) is sequentially stacked and includes at least one sub-insulating layer including a first layer (see “FL” in FIG. 9) and a second layer (see “SL” in FIG. 9) having different refractive indices. can do.
- the cover pattern (CVP) may be partially opened by removing part of it through a photolithography process using a mask. there is.
- the cover pattern (CVP) may cover the third insulating layer (INS3) on the first electrode (PE1) and expose the second electrode (PE2).
- the cover pattern CVP may include an opening, and the opening of the cover pattern CPV may expose the second electrode PE2.
- the color conversion layer (CCL) may be directly disposed on the cover pattern (CVP) and the exposed second electrode (PE2).
- the cover pattern (CVP) is placed only on the third insulating layer (INS3) on the first electrode (PE1), the movement path of total reflection that may occur inside the cover pattern (CVP) is reduced, thereby reducing the amount of light incident on the cover pattern (CVP). Loss can be minimized.
Landscapes
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims (20)
- 발광 영역 및 비발광 영역을 포함한 기판;상기 기판 상에 제공된 복수 개의 발광 소자들;서로 이격되게 배치되고 상기 복수 개의 발광 소자들과 전기적으로 연결된 제1 전극과 제2 전극;상기 제1 전극과 상기 제2 전극 상에 배치된 커버층; 및상기 커버층 상에 배치된 컬러 변환층을 포함하고,상기 커버층은 각각이 순차적으로 적층된 제1 레이어와 제2 레이어를 포함한 복수 개의 서브 절연층들을 포함하며,상기 제1 레이어와 상기 제2 레이어는 굴절률이 서로 상이한, 표시 장치.
- 제1 항에 있어서,상기 제1 레이어는 제1 굴절률을 갖는 제1 무기막이고, 상기 제2 레이어는 제2 굴절률을 갖는 제2 무기막인, 표시 장치.
- 제2 항에 있어서,상기 제1 굴절률은 상기 제2 굴절률보다 작으며,상기 제1 무기막은 실리콘 산화물을 포함하고, 상기 제2 무기막은 실리콘 질화물을 포함하는, 표시 장치.
- 제3 항에 있어서,상기 복수 개의 서브 절연층들 각각은 상기 제2 레이어 상에 적층된 제3 레이어를 더 포함하고,상기 제3 레이어는 제3 굴절률을 갖는 제3 무기막인, 표시 장치.
- 제4 항에 있어서,상기 제3 굴절률은 상기 제2 굴절률과 상이한, 표시 장치.
- 제2 항에 있어서,상기 제2 굴절률은 상기 제1 굴절률보다 작으며,상기 제1 무기막은 실리콘 질화물을 포함하고, 상기 제2 무기막은 실리콘 산화물을 포함하는, 표시 장치.
- 제3 항에 있어서,상기 커버층은 소정 파장 범위 내의 광을 통과시키는, 표시 장치.
- 제1 항에 있어서,상기 컬러 변환층은 상기 복수 개의 발광 소자들에서 방출된 광을 다른 파장으로 변환하는 컬러 변환 입자들을 포함하는, 표시 장치.
- 제7 항에 있어서,상기 기판과 상기 복수 개의 발광 소자들 사이에 배치된 제1 절연층;상기 복수 개의 발광 소자들 상부에 각각 배치된 제2 절연층; 및상기 제1 전극 상에 배치된 제3 절연층을 더 포함하는, 표시 장치.
- 제9 항에 있어서,상기 커버층의 두께는 2㎛ 이하인, 표시 장치.
- 제9 항에 있어서,상기 제1 및 제2 전극들과 상기 커버층 사이에 배치되는 추가 절연층을 더 포함하는, 표시 장치.
- 제11 항에 있어서,상기 추가 절연층은 유기막을 포함하는, 표시 장치.
- 제12 항에 있어서,상기 추가 절연층의 두께는 1.0㎛ 내지 1.3㎛ 정도인, 표시 장치.
- 제11 항에 있어서,상기 추가 절연층은 무기막을 포함하는, 표시 장치.
- 제9 항에 있어서,상기 기판과 상기 제1 절연층 사이에 위치하며 서로 이격된 제1 정렬 전극과 제2 정렬 전극;상기 비발광 영역에 제공되며 상기 발광 영역에 대응하는 개구를 포함한 제1 뱅크;상기 비발광 영역에서 상기 제1 뱅크 상에 위치하고, 상기 컬러 변환층을 둘러싸는 제2 뱅크; 및상기 컬러 변환층 상에 배치된 컬러 필터를 더 포함하는, 표시 장치.
- 제15 항에 있어서,상기 제1 전극은 상기 제1 정렬 전극과 전기적으로 연결되고, 상기 제2 전극은 상기 제2 정렬 전극과 전기적으로 연결되는, 표시 장치.
- 제1 항에 있어서,상기 기판과 상기 복수 개의 발광 소자들 사이에 위치하며, 상기 복수 개의 발광 소자들과 전기적으로 연결된 적어도 하나의 트랜지스터를 포함한 화소 회로층을 더 포함하는, 표시 장치.
- 기판;상기 기판 상에 제공된 복수개의 발광 소자들;서로 이격되게 배치되고 상기 복수 개의 발광 소자들과 전기적으로 연결된 제1 전극과 제2 전극;상기 제1 전극 상에 배치되어 상기 제1 전극을 커버하는 커버 패턴; 및상기 커버 패턴 상에 배치된 컬러 변환층을 포함하고,상기 커버 패턴은 각각이 순차적으로 적층된 제1 레이어와 제2 레이어를 포함한 복수 개의 서브 절연층들 및 개구부를 포함하고,상기 제1 레이어와 상기 제2 레이어는 굴절률이 서로 상이하며,상기 커버 패턴의 개구부는 상기 제2 전극을 노출하는, 표시 장치.
- 제18 항에 있어서,상기 컬러 변환층은 상기 커버 패턴 및 상기 제2 전극 상에 직접 배치되고,상기 커버 패턴은 상기 제2 전극 상에 배치되지 않는, 표시 장치.
- 제18 항에 있어서,상기 커버 패턴은 소정 파장 범위 내의 광을 선택적으로 통과시키는, 표시 장치.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380048634.1A CN119422467A (zh) | 2022-06-28 | 2023-06-26 | 显示装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020220079092A KR20240002279A (ko) | 2022-06-28 | 2022-06-28 | 표시 장치 |
| KR10-2022-0079092 | 2022-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024005476A1 true WO2024005476A1 (ko) | 2024-01-04 |
Family
ID=89323603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/008839 Ceased WO2024005476A1 (ko) | 2022-06-28 | 2023-06-26 | 표시 장치 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230420622A1 (ko) |
| KR (1) | KR20240002279A (ko) |
| CN (1) | CN119422467A (ko) |
| WO (1) | WO2024005476A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180090421A (ko) * | 2017-02-02 | 2018-08-13 | 삼성디스플레이 주식회사 | 유기 발광 표시 장치 |
| KR20200079817A (ko) * | 2018-12-26 | 2020-07-06 | 엘지디스플레이 주식회사 | 표시 장치 |
| KR20210073955A (ko) * | 2019-12-11 | 2021-06-21 | 삼성전자주식회사 | 디스플레이 장치 및 그 제조 방법 |
| KR20220054507A (ko) * | 2020-10-23 | 2022-05-03 | 삼성디스플레이 주식회사 | 화소 및 이를 구비한 표시 장치 |
| KR20220081455A (ko) * | 2020-12-08 | 2022-06-16 | 삼성디스플레이 주식회사 | 표시 장치 및 그 제조 방법 |
-
2022
- 2022-06-28 KR KR1020220079092A patent/KR20240002279A/ko active Pending
-
2023
- 2023-06-14 US US18/334,512 patent/US20230420622A1/en active Pending
- 2023-06-26 WO PCT/KR2023/008839 patent/WO2024005476A1/ko not_active Ceased
- 2023-06-26 CN CN202380048634.1A patent/CN119422467A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180090421A (ko) * | 2017-02-02 | 2018-08-13 | 삼성디스플레이 주식회사 | 유기 발광 표시 장치 |
| KR20200079817A (ko) * | 2018-12-26 | 2020-07-06 | 엘지디스플레이 주식회사 | 표시 장치 |
| KR20210073955A (ko) * | 2019-12-11 | 2021-06-21 | 삼성전자주식회사 | 디스플레이 장치 및 그 제조 방법 |
| KR20220054507A (ko) * | 2020-10-23 | 2022-05-03 | 삼성디스플레이 주식회사 | 화소 및 이를 구비한 표시 장치 |
| KR20220081455A (ko) * | 2020-12-08 | 2022-06-16 | 삼성디스플레이 주식회사 | 표시 장치 및 그 제조 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119422467A (zh) | 2025-02-11 |
| KR20240002279A (ko) | 2024-01-05 |
| US20230420622A1 (en) | 2023-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020122337A1 (ko) | 표시 장치 및 그의 제조 방법 | |
| WO2020175783A1 (ko) | 표시 장치 | |
| WO2020075935A1 (ko) | 발광 장치, 그의 제조 방법, 및 이를 구비한 표시 장치 | |
| WO2020059990A1 (ko) | 표시 장치 및 그의 제조 방법 | |
| WO2020149471A1 (ko) | 표시 장치 | |
| WO2020226276A1 (ko) | 화소 및 이를 구비한 표시 장치 | |
| WO2020075936A1 (ko) | 발광 장치, 그의 제조 방법, 및 이를 구비한 표시 장치 | |
| WO2021006509A1 (ko) | 표시 장치 | |
| WO2020111391A1 (ko) | 표시 장치 및 그의 제조 방법 | |
| WO2022050771A1 (ko) | 표시 장치 | |
| WO2022010131A1 (ko) | 표시 장치 | |
| WO2022240094A1 (ko) | 표시 장치 및 그의 제조 방법 | |
| WO2022086037A1 (ko) | 화소 및 이를 구비한 표시 장치 | |
| WO2022065706A1 (ko) | 표시 장치 및 그의 제조 방법 | |
| WO2022085922A1 (ko) | 화소 및 이를 구비한 표시 장치 | |
| WO2022025395A1 (ko) | 표시 장치 | |
| WO2021125574A1 (ko) | 표시장치 및 이의 제조방법 | |
| WO2022039417A1 (ko) | 표시 장치 | |
| WO2021045413A1 (ko) | 표시 장치 | |
| WO2023277504A1 (ko) | 화소 및 이를 구비한 표시 장치 | |
| WO2022025475A1 (ko) | 표시 장치 | |
| WO2022035163A1 (ko) | 화소 및 이를 구비한 표시 장치 | |
| WO2022086018A1 (ko) | 표시 장치 | |
| WO2022045708A1 (ko) | 발광 소자, 그의 제조 방법, 및 이를 포함한 표시 장치 | |
| WO2022186569A1 (ko) | 표시 장치 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23831836 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380048634.1 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380048634.1 Country of ref document: CN |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 23831836 Country of ref document: EP Kind code of ref document: A1 |