Light control member and display device including same

Abstract

In one embodiment, the light control member and a display device including the same include a light control layer including a base region and a light conversion region in which a plurality of light converters are arranged in an aggregated manner, and each of the light converters includes quantum dots and liquid crystal ligands bonded to the surfaces of the quantum dots, thereby exhibiting excellent light extraction efficiency and low reflection characteristics.

Description

[Technical field]

[0001] The present invention relates to a display device including an anti-reflection member. [Background technology]

[0002] The display device includes a transmissive display device that selectively transmits source light generated from a light source, and an emissive display device that generates source light from the display device itself. The display device may include different types of light control units depending on the pixel to generate a color image. The light control unit may transmit only a certain wavelength range of the source light or may change the color of the source light. Some light control units may change the characteristics of the light without changing the color of the source light.

[0003] In display devices, quantum dot materials or the like are used in the light control unit, and in order to improve the display quality of the display device, there is a demand for technological development to increase the light conversion efficiency or light transmission efficiency in the light control unit. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a light control member having reduced reflectance of external light and excellent light extraction efficiency.

[0005] An object of the present invention is to provide a display device having excellent display quality by including a highly controllable member having reduced reflectance due to external light and good light scattering properties. [Means for solving the problem]

[0006] One embodiment provides a light control member that includes a light control layer including a base region and a light conversion region in which a plurality of light conversion bodies are condensed and arranged, each of the light conversion bodies including a quantum dot and a liquid crystal ligand bound to a surface of the quantum dot.

[0007] The base resin region and the light conversion region may have different refractive indices.

[0008] The base resin region may include a polymer derived from at least one monomer selected from the group consisting of an acrylate-based monomer and an epoxy-based monomer.

[0009] The quantum dots may be red quantum dots that emit red light when excited by blue or green light, or green quantum dots that emit green light when excited by the blue light.

[0010] The liquid crystal ligand is represented by the following Formula 1.

[0011] <Chemical formula 1> JPEG2025508655000002.jpg3386

[0012] In the above formula 1, a and b are each independently an integer of 1 to 3, n is 0 or 1, Cx and Cy are each independently a benzene ring or a cyclohexane ring, L is a divalent ester (COO) group, a divalent ethylene group, a divalent methoxy group, a divalent acetylene group, or a divalent amine group, R is a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, or a nitro group, and X and Y are each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a cyano group, or a halogen atom.

[0013] The liquid crystal ligand is represented by any one of the following formulas LD-1 to LD-3, where R in LD-1 is as defined in formula 1.

[0014] JPEG2025508655000003.jpg29126

[0015] JPEG2025508655000004.jpg2776

[0016] JPEG2025508655000005.jpg2679

[0017] The base resin region and the light conversion region may be regions that are phase-separated and partitioned from each other during the polymerization process of a light conversion resin composition that includes the monomer and a light conversion body dispersed in the monomer.

[0018] A cross section of the light control layer may have base resin regions separated from one another and a fingerprint pattern formed from an arrangement of the light conversion regions.

[0019] The light control layer includes a division pattern in which a plurality of openings are defined, and first to third light control parts arranged in each of the openings, and the first light control part includes the base resin region and a red light conversion region, the second light control part includes the base resin region and a green light conversion region, and the third light control part includes the base resin region and a ligand region in which the liquid crystal ligand is arranged in an aggregated manner.

[0020] The refractive index of the base resin region may be different from the refractive indexes of the red light conversion region, the green light conversion region, and the ligand region.

[0021] The red light conversion region may include a red light converter including red quantum dots that emit red light when excited by blue light or green light and the liquid crystal ligand bound to the surface of the red quantum dots, and the green light conversion region may include a green light converter including green quantum dots that emit green light when excited by the blue light and the liquid crystal ligand bound to the surface of the green quantum dots.

[0022] In the first light control unit, the red light conversion body may be contained in an amount of 20 wt% or more and 60 wt% or less, based on a total weight of the first light control unit of 100 wt%, and in the second light control unit, the green light conversion body may be contained in an amount of 20 wt% or more and 60 wt% or less, based on a total weight of the second light control unit of 100 wt%.

[0023] The third light controller may include the liquid crystal ligand in an amount of 5 wt % to 10 wt %, based on a total weight of the third light controller being 100 wt %.

[0024] The optical element may further include a color filter layer disposed on the light control layer and including a first filter, a second filter, and a third filter corresponding to the first light control portion, the second light control portion, and the third light control portion, respectively.

[0025] Another embodiment provides a display device including: (1) a lower panel including a display element layer in which a light-emitting region is defined; and (2) an upper panel disposed on the lower panel, the upper panel including a light control layer including a division pattern in which an opening that overlaps the light-emitting region is defined, and a light control unit disposed in the opening, the light control layer including a base resin region and a light conversion region in which a plurality of light converters are aggregated and disposed, each of the light converters including a quantum dot and a liquid crystal ligand bound to a surface of the quantum dot.

[0026] The base resin region and the light conversion region may have different refractive indices.

[0027] The base resin region may include a polymer derived from at least one monomer selected from the group consisting of an acrylate-based monomer and an epoxy-based monomer.

[0028] The liquid crystal ligand may be represented by the following Formula 1:

[0029] <Chemical formula 1> JPEG2025508655000006.jpg3386

[0030] In the above formula 1, a and b are each independently an integer of 1 to 3, n is 0 or 1, Cx and Cy are each independently a benzene ring or a cyclohexane ring, L is a divalent ester (COO) group, a divalent ethylene group, a divalent methoxy group, a divalent acetylene group, or a divalent amine group, R is a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, or a nitro group, and X and Y are each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a cyano group, or a halogen atom.

[0031] A cross section of the light control layer may have base resin regions separated from one another and a fingerprint pattern formed from an arrangement of the light conversion regions.

[0032] The light control layer may include (1) a first light control section including the base resin region and a red light conversion region separated from the base resin region, (2) a second light control section including the base resin region and a green light conversion region separated from the base resin region, and (3) a third light control section including the base resin region and a ligand region separated from the base resin region and in which the liquid crystal ligand is arranged in an aggregated manner.

[0033] The refractive index of the base resin region may be different from the refractive indexes of the red light conversion region, the green light conversion region, and the ligand region.

[0034] In the first light control unit, the red light conversion body may be contained in an amount of 20 wt% to 60 wt% based on a total weight of the first light control unit of 100 wt%, in the second light control unit, the green light conversion body may be contained in an amount of 20 wt% to 60 wt% based on a total weight of the second light control unit of 100 wt%, and in the third light control unit, the liquid crystal ligand may be contained in an amount of 5 wt% to 10 wt% based on a total weight of the third light control unit of 100 wt%.

[0035] The display element layer includes a first electrode, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and includes a light-emitting element that outputs source light, the first light control unit includes a first light converter that converts the source light into a first color light, the second light control unit includes a second light converter that converts the source light into a second color light, and the third light control unit can transmit the source light.

[0036] The first optical conversion body may include a first quantum dot that is excited by the source light to emit the first light and a liquid crystal ligand bound to a surface of the first quantum dot, and the second optical conversion body may include a second quantum dot that is excited by the source light to emit the second light and a liquid crystal ligand bound to a surface of the second quantum dot.

[0037] The upper panel may further include a filter layer including (1) a first filter disposed above the light control layer, overlaying the first light control unit and transmitting the first light, (2) a second filter overlaying the second light control unit and transmitting the second light, and (3) a third filter overlaying the third light control unit and transmitting the source light.

[0038] The light control section may be free of scatterers. Effect of the Invention

[0039] In one embodiment, the light control member includes a phase-separated base resin region and a light conversion region, and exhibits excellent light extraction efficiency by effectively scattering incident light, and exhibits reduced reflectance due to external light by not including a scatterer.

[0040] In addition, the display device of one embodiment includes a light control section that is phase-separated into a base resin region and a light conversion region without including a scatterer, thereby reducing the reflectance of external light and improving the light extraction efficiency, thereby enabling the display quality to be excellent. [Brief description of the drawings]

[0041] [Figure 1] 1 is a perspective view of a display device according to an embodiment; [Diagram 2] FIG. 1 is a cross-sectional view of a display device according to an embodiment. [Diagram 3] FIG. 2 is a plan view of a portion of a display device according to an embodiment. [Figure 4] 1 is a cross-sectional view of a portion of a display device according to an embodiment. [Diagram 5] 1 is a cross-sectional view of a portion of a display device according to an embodiment. [Figure 6] FIG. 2 is a cross-sectional view of a light control layer according to one embodiment. [Figure 7a] FIG. 2 is a diagram of a part of a light control unit according to an embodiment. [Figure 7b] FIG. 2 is a diagram of a part of a light control unit according to an embodiment. [Figure 8] 5A to 5C are diagrams illustrating some of the steps for manufacturing a light control unit according to one embodiment. [Figure 9] 10 is a diagram illustrating an example of a light travel direction in a light control unit according to an embodiment; [Figure 10] 1 is a graph showing the relationship between light extraction efficiency and reflectance in a comparative example and an example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Since the present invention can be modified in various ways and can have various forms, specific embodiments are shown in the drawings and described in detail in the text, but it is not intended to limit the present invention to the specific disclosed forms, but it should be understood that the present invention includes all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0043] As used herein, when a component (or region, layer, portion, etc.) is referred to as being "on" or "coupled" to another component, it means that it may be directly disposed, coupled, or connected to the other component, or that a third component may be disposed therebetween.

[0044] On the other hand, in this application, "directly disposed" may mean that there is no additional layer, film, region, plate, etc. between a portion such as a layer, film, region, plate, etc. and another portion. For example, "directly disposed" may mean disposed between two layers or two members without using an additional member such as an adhesive member.

[0045] The same reference numerals refer to the same elements. Also, in the drawings, thicknesses, ratios, and dimensions of the elements are exaggerated for the purpose of effectively explaining the technical contents. "And / or" includes all combinations of one or more of the elements defined by the associated elements.

[0046] Terms such as "first" and "second" are used to describe various components, but the components are not limited to these terms. The terms are used only to distinguish one component from another. For example, the first component may be named the second component without departing from the scope of the present invention, and similarly, the second component may be named the first component. A singular surface includes a plural expression unless the context clearly indicates otherwise.

[0047] Additionally, terms such as "under," "below," "on," and "above" are used to explain the relationship between components shown in the drawings. The terms are relative concepts and are explained based on the directions shown in the drawings. In this specification, "disposed on" refers to being disposed not only above (above) any one component but also below (below) any one component.

[0048] It should be understood that terms such as "comprise" or "have" specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described above in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. Furthermore, terms that are defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an overly ideal or formal sense unless expressly defined herein.

[0050] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a light control member and a display device including the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0051] Fig. 1 is a perspective view showing a display device of an embodiment, Fig. 2 is a cross-sectional view showing a display device of an embodiment, Fig. 2 is a cross-sectional view showing a schematic view of a part corresponding to the line II' in Fig. 1.

[0052] In one embodiment, the electronic device DD may be a device that is activated by an electrical signal. For example, the display device DD may be, but is not limited to, a mobile phone, a tablet, a car navigation system, a game console, or a wearable device.

[0053] Meanwhile, in the following, the first to third directional axes DR1 to DR3 are shown in FIG. 1 and the following drawings, and the directions indicated by the first to third directional axes DR1, DR2, and DR3 described in this specification are relative concepts and may be converted into other variations. Also, the directions indicated by the first to third directional axes DR1, DR2, and DR3 may be described as the first to third directions, and the same reference numerals may be used.

[0054] In this specification, the thickness direction of the display device DD may be a direction aligned with a third directional axis DR3 that is a normal direction to a surface defined (specified) by the first directional axis DR1 and the second directional axis DR2. In this specification, the front surface (or top surface) and the back surface (or bottom surface) of the members constituting the display device DD may be defined based on the third directional axis DR3.

[0055] In one embodiment, the display device DD may include a display area DA and a non-display area NDA adjacent to the display area DA. The display area DA corresponds to a portion where an image is displayed. A plurality of pixel areas PXA may be arranged in the display area DA. The plurality of pixel areas PXA may include first to third pixel areas PXA-R, PXA-G, and PXA-B (FIG. 3) that emit light of different wavelength ranges.

[0056] In one embodiment, the display area DA may be rectangular. The non-display area NDA may surround the display area DA. However, this is not limited thereto, and the shapes of the display area DA and the non-display area NDA may be designed relatively. In addition, the non-display area NDA may not be present on the display surface, which is the front surface of the display device DD.

[0057] In one embodiment, the display device DD may include a lower panel DP including a display element layer DP-ED (FIG. 4) and an upper panel OP including a light control layer CCL (FIG. 4). In one embodiment, a filling layer FML may be disposed between the lower panel DP and the upper panel OP. In one embodiment, the lower panel DP may be referred to as a display panel or a display substrate, and the upper panel OP may be referred to as a light control member or a light control substrate.

[0058] In the display device DD of one embodiment, the filling layer FML may fill the gap between the lower panel DP and the upper panel OP. The filling layer FML may function as a buffer between the lower panel DP and the upper panel OP. In one embodiment, the filling layer FML may perform a shock absorbing function and increase the strength of the display device DD. The filling layer FML may be made of a filling layer resin including a polymer resin. For example, the filling layer FML may be made of a filling layer resin including an acrylic resin or an epoxy resin.

[0059] On the other hand, in one embodiment, the filling layer FML may be omitted and the upper panel OP may be disposed directly on the lower panel DP. For example, in one embodiment, the filling layer FML may be omitted and the light control layer CCL (FIG. 4) may be disposed on the lower panel DP.

[0060] The display device DD according to an embodiment may include a sealing part SLM disposed between the lower panel DP and the upper panel OP. The sealing part SLM may combine the lower panel DP and the upper panel OP. The sealing part SLM may be disposed in the non-display area NDA, which is an outer periphery of the display device DD, and may prevent foreign matter, oxygen, moisture, and the like from entering the inside of the display device DD from the outside. The sealing part SLM may be made of a sealant including a curable resin. The sealant may include an epoxy resin or an acrylic resin. The sealant may be a thermosetting material or a photocurable material. The sealant may be provided on one side of the lower panel DP or the upper panel OP, and may then be bonded to the lower panel DP and the upper panel OP so as to face each other, and may be cured by heat, ultraviolet light, or the like to form the sealing part SLM.

[0061] Fig. 3 is a plan view of a portion of a display device according to an embodiment. Fig. 4 is a cross-sectional view of a display device according to an embodiment. Fig. 5 is a cross-sectional view of a portion of a display device according to an embodiment. Fig. 4 is a cross-sectional view corresponding to line II-II' in Fig. 3, and Fig. 5 is a cross-sectional view corresponding to line III-III' in Fig. 3.

[0062] 3 and 4, the display device DD of an embodiment may include a plurality of pixel regions PXA-R, PXA-G, and PXA-B. For example, the display device DD of an embodiment may include a first pixel region PXA-R, a second pixel region PXA-G, and a third pixel region PXA-B that are separated from each other. The first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may emit light of different wavelength regions. For example, in an embodiment, the first light-emitting region PXA-R may be a red light-emitting region that emits red light, the second light-emitting region PXA-G may be a green light-emitting region that emits green light, and the third light-emitting region PXA-B may be a blue light-emitting region that emits blue light. However, the embodiment is not limited thereto, and the plurality of pixel regions PXA-R, PXA-G, and PXA-B may include three groups of pixel regions that display three primary colors, yellow, magenta, and cyan.

[0063] In one embodiment, the pixel regions PXA-R, PXA-G, and PXA-B may be repeatedly arranged throughout the display region DA (FIG. 1). The first to third pixel regions PXA-R, PXA-G, and PXA-B may be divided without overlapping each other when viewed from a plane. A peripheral region NPXA is arranged around the first to third pixel regions PXA-R, PXA-G, and PXA-B. The peripheral region NPXA sets the boundaries between the first to third pixel regions PXA-R, PXA-G, and PXA-B. The peripheral region NPXA may surround the first to third pixel regions PXA-R, PXA-G, and PXA-B. A structure for preventing color mixing between the first to third pixel regions PXA-R, PXA-G, and PXA-B, such as a pixel definition film PDL or a division pattern BMP, may be arranged in the peripheral region NPXA.

[0064] 3 shows an example of a display device DD including first to third pixel regions PXA-R, PXA-G, and PXA-B having the same planar shape but different planar areas, but the embodiment is not limited thereto. The areas of the first to third pixel regions PXA-R, PXA-G, and PXA-B may be the same, or the area of ​​at least one type of pixel region may be different from the area of ​​the remaining types of pixel regions. The areas of the first to third pixel regions PXA-R, PXA-G, and PXA-B may be set according to the light output color.

[0065] 3, the first to third pixel regions PXA-R, PXA-G, and PXA-B may have a rectangular shape on a plane. However, the embodiment is not limited thereto, and the first to third pixel regions PXA-R, PXA-G, and PXA-B may have other polygonal shapes (including substantially polygonal shapes) such as a rhombus or a pentagon on a plane. The first to third pixel regions PXA-R, PXA-G, and PXA-B may have a rectangular shape (substantially rectangular) with rounded corners on a plane.

[0066] 3, the second pixel region PXA-G is arranged in the first row, and the first pixel region PXA-R and the third pixel region PXA-B are arranged in the second row, but the arrangement of the first to third pixel regions PXA-R, PXA-G, and PXA-B may be changed in various ways. For example, the first to third pixel regions PXA-R, PXA-G, and PXA-B may be arranged in the same row.

[0067] The pixel regions PXA-R, PXA-G, and PXA-B may be arranged in a striped pattern, in a PENTILE (registered trademark) arrangement, or in a diamond arrangement. However, the embodiment is not limited thereto, and the arrangement order and arrangement form of the pixel regions PXA-R, PXA-G, and PXA-B may be provided in various combinations according to the display quality characteristics required by the display device DD.

[0068] 3 and 5, the display device DD of one embodiment may include a bank well area BWA. The bank well area BWA may be disposed between the pixel areas PXA-R, PXA-G, and PXA-B. When viewed from above, the bank well area BWA may not overlap with the pixel areas PXA-R, PXA-G, and PXA-B. The bank well area BWA and the pixel areas PXA-R, PXA-G, and PXA-B may be divided by a division pattern BMP.

[0069] The bankwell region BWA may be a portion corresponding to an opening BW-OH defined between the divided patterns BMP in order to prevent defects caused by erroneous landing of ink used in the process of patterning a plurality of light control units CCP1, CCP2, and CCP3. A portion of the ink provided to form the light control units CCP1, CCP2, and CCP3 that is erroneously landed may be disposed in the bankwell region BWA, and a coalescence defect caused by the erroneous landing of the ink may be improved. In other words, although not illustrated in the present invention, a portion of the ink composition for forming the light control units CCP1, CCP2, and CCP3 may be disposed in at least a portion of the bankwell region BWA.

[0070] The bank well region BWA may be defined to be adjacent to the pixel regions PXA-R, PXA-G, and PXA-B. The shape, number, and arrangement of the bank well region BWA on a plane are not limited to those shown in FIG. 3 and may be variously changed.

[0071] 4 and 5, in one embodiment, the lower panel DP may include a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a display element layer DP-ED disposed on the circuit layer DP-CL. The lower panel DP may also include an encapsulation layer TFE disposed on the display element layer DP-ED. The display element layer DP-ED may include a pixel definition film PDL and a light-emitting element EMD. The encapsulation layer TFE may cover an upper portion of the display element layer DP-ED. The encapsulation layer TFE may fill a gap between the display element layer DP-ED and a filling layer FML.

[0072] In the display device DD according to an embodiment, the lower panel DP may be a light-emitting display panel. That is, the lower panel DP may be an organic electroluminescence display panel. If the lower panel DP is an organic electroluminescence display panel, the display element layer DP-ED may include an organic electroluminescence element as the light-emitting element EMD. However, the embodiment is not limited thereto. For example, the display element layer DP-ED may include a quantum dot light-emitting diode as the light-emitting element EMD. Also, the display element layer DP-ED may include a micro LED element and / or a nano LED element as the light-emitting element EMD. The light-emitting element EMD may generate source light. The source light generated and output from the light-emitting element EMD is provided to the upper panel OP, and the source light may be converted into light of another wavelength or may be scattered and transmitted in the light control layer CCL of the upper panel OP.

[0073] In the lower panel DP, the base layer BS may be a member providing a base surface on which the display element layers EP-ED are disposed. The base layer BS may be a glass substrate, a metal substrate, a polymer substrate, etc. However, embodiments are not limited thereto, and the base layer BS may be an inorganic layer, an organic layer, or a composite material layer.

[0074] The base layer BS may have a multi-layer structure. For example, the base layer BS may have a three-layer structure of a polymer resin layer, an adhesive layer, and a polymer resin layer. In particular, the polymer resin layer may include a polyimide-based resin. In addition, the polymer resin layer may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene-based resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a siloxane-based resin, a polyamide resin, and a perylene-based resin. Meanwhile, in this specification, a "XX-based" resin means that it contains a functional group of "XX".

[0075] The circuit layer DP-CL may be disposed on the base layer BS. The circuit layer DP-CL may include an insulating layer, a semiconductor pattern, a conductive pattern, and a signal line. The insulating layer, the semiconductor layer, and the conductive layer may be formed on the base layer BS by a method such as coating or deposition, and then the insulating layer, the semiconductor layer, and the conductive layer may be selectively patterned by multiple photolithography processes. Then, the semiconductor pattern, the conductive pattern, and the signal line included in the circuit layer DP-CL may be formed. In one embodiment, the circuit layer DP-CL may include a transistor, a buffer layer, and multiple insulating layers.

[0076] 4, the light emitting element EMD according to an embodiment may include a first electrode EL1, a second electrode EL2 facing the first electrode EL1, and an emitting layer EML disposed between the first electrode EL1 and the second electrode EL2. The emitting layer EML included in the light emitting element EMD may include an organic emitting material or quantum dots as a emitting material. The light emitting element EMD may further include a hole control layer HTR and an electron control layer ETR. Meanwhile, although not shown, the light emitting element EMD may further include a capping layer (not shown) disposed on the second electrode EL2.

[0077] The pixel definition film PDL may be disposed on the circuit layer DP-CL and cover a portion of the first electrode EL1. A light-emitting opening OH is defined in the pixel definition film PDL. The light-emitting opening OH of the pixel definition film PDL exposes at least a portion of the first electrode EL1. In this embodiment, light-emitting areas EA1, EA2, and EA3 are defined to correspond to a portion of the first electrode EL1 exposed by the light-emitting opening OH.

[0078] The lower panel DP may include a first light-emitting region EA1, a second light-emitting region EA2, and a third light-emitting region EA3. The first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 may be regions divided by a pixel definition film PDL. The first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 may correspond to the first pixel region PXA-R, the second pixel region PXA-G, and the third region PXA-B, respectively. Meanwhile, in this specification, "corresponding" means that two configurations overlap when viewed from the thickness direction DR3 of the display device DD, and is not limited to the same area.

[0079] The light-emitting regions EA1, EA2, and EA3 may overlap with the pixel regions PXA-R, PXA-G, and PXA-B, but may not overlap with the bank well region BWA. When viewed from above, the areas of the pixel regions PXA-R, PXA-G, and PXA-B divided by the division pattern BMP may be larger than the areas of the light-emitting regions EA1, EA2, and EA3 divided by the pixel definition film PDL.

[0080] In the light emitting element EMD, the first electrode EL1 is disposed on the circuit layer DP-CL. The first electrode EL1 can be an anode or a cathode. The first electrode EL1 can also be a pixel electrode. The first electrode EL1 can be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0081] The hole control layer HTR may be disposed between the first electrode EL1 and the light emitting layer EML. The hole control layer HTR may include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. The hole control layer HTR may be disposed as a common layer so as to overlap the entire light emitting areas EA1, EA2, and EA3 and the pixel defining film PDL that divides the light emitting areas EA1, EA2, and EA3. However, the embodiment is not limited thereto, and the hole control layer HTR may be provided by being patterned so as to be disposed separately corresponding to each of the light emitting areas EA1, EA2, and EA3.

[0082] The light-emitting layer EML is disposed on the hole control layer HRT. In one embodiment, the light-emitting layer EML can be provided as a common layer so as to overlap the entire light-emitting areas EA1, EA2, and EA3 and the pixel-defining film PDL that divides the light-emitting areas EA1, EA2, and EA3. In one embodiment, the light-emitting layer EML can emit blue light. In one embodiment of the display device DD, the blue light can be the source light.

[0083] The emitting layer EML may overlap the entire hole control layer HTR and the electron control layer ETR. However, the embodiment is not limited thereto, and in one embodiment, the emitting layer EML may be disposed in the light-emitting opening OH. That is, the emitting layer EML may be formed separately to correspond to the emitting regions EA1, EA2, and EA3 divided by the pixel defining film PDL. The emitting layers EML formed separately to correspond to the emitting regions EA1, EA2, and EA3 may all emit light in the same wavelength region, or may emit light in different wavelength regions from each of the emitting regions EA1, EA2, and EA3.

[0084] The light-emitting layer EML may have a single layer of a single material, a single layer of a plurality of different materials, or a multi-layer structure having a plurality of layers of a plurality of different materials. The light-emitting layer EML may include a fluorescent or phosphorescent material. In one embodiment of the light-emitting device, the light-emitting layer EML may include an organic light-emitting material, a metal-organic complex, or a quantum dot as a light-emitting material.

[0085] The electronic control layer ETR may be disposed between the light emitting layer EML and the second electrode EL2. The electronic control layer ETR may include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer. Referring to FIG. 4, the electronic control layer ETR may be disposed as a common layer so as to overlap the entire light emitting areas EA1, EA2, and EA3 and the pixel defining film PDL that divides the light emitting areas EA1, EA2, and EA3. However, the embodiment is not limited thereto, and the electronic control layer ETR may be provided by being patterned so as to be disposed separately corresponding to each of the light emitting areas EA1, EA2, and EA3.

[0086] The second electrode EL2 may be provided on the electronic control layer ETR. The second electrode EL2 may be a common electrode. The second electrode EL2 may be a cathode or an anode, but the embodiment is not limited thereto. For example, if the first electrode EL1 is an anode, the second electrode may be a cathode, and if the first electrode EL1 is a cathode, the second electrode EL2 may be an anode. The second electrode EL2 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0087] The encapsulation layer TFE may be disposed on the light emitting element EMD. More specifically, in one embodiment, the encapsulation layer TFE may be disposed on the second electrode EL2. Also, if the light emitting element EMD includes a capping layer (not shown), the encapsulation layer TFE may be disposed on the capping layer (not shown). The encapsulation layer TFE includes at least one organic film and at least one inorganic film, and the inorganic film and the organic film may be alternately disposed. The encapsulation layer TFE may play a role in protecting the display element layer DP-ED from moisture / oxygen and preventing foreign matter such as dust particles from entering.

[0088] The sealing layer TFE may include at least one inorganic film containing at least one of silicon nitride, silicon oxynitride, and silicon oxide. The inorganic film may also include titanium oxide, aluminum oxide, or the like.

[0089] The sealing layer TFE may include an organic film disposed between inorganic films. The organic film may include an organic polymer material such as an acrylate resin, although the embodiment is not limited thereto.

[0090] Referring to FIG. 4, the display device DD of one embodiment may include an upper panel OP disposed above (on the upper side of) the lower panel DP and including a light control layer CCL. The light control layer CCL may include a division pattern BMP and light control units CCP1, CCP2, and CCP3. In one embodiment, the upper panel OP may further include a base substrate BL and a color filter layer CFL. Meanwhile, in one embodiment, at least one of the base substrate BL and the color filter layer CFL may be omitted. For example, in one embodiment, the base substrate BL is omitted, and the upper panel OP, which is a light control member, may include a light control layer CCL and a color filter layer CFL disposed above the light control layer CCL.

[0091] The light control parts CCP1, CCP2, and CCP3 included in the light control layer CCL may be separated from each other. The light control parts CCP1, CCP2, and CCP3 may be arranged separated from each other by the division pattern BMP. The light control parts CCP1, CCP2, and CCP3 may be arranged in the opening BW-OH defined by the division pattern BMP. However, the embodiment is not limited thereto. In FIG. 4, the division pattern BMP is shown as not overlapping with the light control parts CCP1, CCP2, and CCP3, but the edges of the light control parts CCP1, CCP2, and CCP3 may at least partially overlap with the division pattern BMP.

[0092] The light control units CCP1, CCP2, and CCP3 may be parts that convert the wavelength of the hole provided from the display element layer DP-ED, or transmit the provided light without changing the wavelength. The light control units CCP1, CCP2, and CCP3 may be formed by an inkjet process. A liquid ink composition is provided in the opening BW-OH, and the provided ink composition is polymerized by a thermal curing process or a photocuring process to form the light control units CCP1, CCP2, and CCP3.

[0093] The light control layer CCL may include a base resin region BRA (FIG. 6) and light conversion regions R-QDA and G-QDA (FIG. 6) that are separated by phase separation. The light control layer CCL may also include a base resin region BRA (FIG. 6) and a ligand region LGA (FIG. 6) that are separated by phase separation. The first light control unit CCP1 converts the source light generated and provided from the light emitting element EMD into a first color light, and the second light control unit CCP2 may convert the source light generated and provided from the light emitting element EMD into a second color light. The third light control unit CCP3 may transmit light in a wavelength region that is incident on the source light. For example, in one embodiment, the source light may be blue light, the first color light may be red light, and the second color light may be green light. However, the embodiment is not limited thereto, and the colors of the source light and the emitted first and second color lights may be changed within a range satisfying the condition that the central wavelength of the second color light is longer than that of the source light and the central wavelength of the first color light is longer than that of the second color light. The light controllers CCP1, CCP2, and CCP3 included in the light control layer CCL according to one embodiment will be described in more detail later.

[0094] The light control layer CCL may further include a barrier layer CAP, CAP-T disposed at least one of above (upper part) and below (lower part) the light control parts CCP1, CCP2, CCP3. The barrier layer CAP, CAP-T may play a role in preventing the penetration of moisture and / or oxygen (hereinafter referred to as "moisture / oxygen"). The barrier layer CAP, CAP-T may be disposed above (upper part) and below (lower part) the light control parts CCP1, CCP2, CCP3, and may prevent the light control parts CCP1, CCP2, CCP3 from being exposed to moisture / oxygen.

[0095] The barrier layer may include a first barrier layer CAP adjacent to the filling layer FML and a second barrier layer CAP-T separated from the filling layer FML with the light control units CCP1, CCP2, and CCP3 sandwiched therebetween. The first barrier layer CAP covers one side of the light control units CCP1, CCP2, and CCP3 adjacent to the lower panel DP, and the second barrier layer CAP-T may cover the other side of the light control units CCP1, CCP2, and CCP3 adjacent to the color filter layer CFL. In addition, the barrier layers CAP and CAP-T may cover not only the light control units CCP1, CCP2, and CCP3 but also the division pattern BMP.

[0096] The first barrier layer CAP may be disposed following the steps of the division pattern BMP and the light control parts CCP1, CCP2, and CCP3. The second barrier layer CAP-T may cover one surface of the division pattern BMP and the light control parts CCP1, CCP2, and CCP3 adjacent to the color filter layer CFL. The second barrier layer CAP-T may be disposed directly below (below) the low refractive layer LR.

[0097] The barrier layer CAP, CAP-T may include at least one inorganic layer. That is, the barrier layer CAP, CAP-T may include an inorganic material. For example, the barrier layer CAP, CAP-T may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, or a metal thin film with a guaranteed light transmittance. For example, the first barrier layer CAP disposed below (below) the light controllers CCP1, CCP2, and CCP3 may include silicon oxynitride, and the second barrier layer CAP-T disposed above (upper) the light controllers CCP1, CCP2, and CCP3 may include silicon oxide. However, the embodiment is not limited thereto. Meanwhile, the barrier layer CAP, CAP-T may further include an organic film. The barrier layer CAP, CAP-T may be composed of a single layer or multiple layers.

[0098] In the display device DD of one embodiment, the upper panel OP may include a color filter layer CFL disposed on the light control layer CCL. The color filter layer CFL may include filters CF1, CF2, and CF3. The color filter CFL may include a first filter CF1 that transmits a first color light, a second filter CF2 that transmits a second color light, and a third filter CF3 that transmits light in a wavelength region corresponding to the source light. For example, the first filter CF1 may be a red filter, the second filter CF2 may be a green filter, and the third filter CF3 may be a blue filter. Each of the filters CF1, CF2, and CF3 may include a polymer photosensitive resin and a pigment or dye. The first filter CF1 may include a red pigment or dye, the second filter CF2 may include a green pigment or dye, and the third filter CF3 may include a blue pigment or dye. However, the embodiment is not limited thereto, and the third filter CF3 may not include a pigment or dye. The third filter CF3 may include a polymer photosensitive resin and not include a pigment or dye. The third filter CF3 may be transparent. The third filter CF3 may be made of a transparent photosensitive resin.

[0099] In addition, in one embodiment, the first filter CF1 and the second filter CF2 may be yellow filters. The first filter CF1 and the second filter CF2 may be provided integrally without being separated from each other. The first to third color filters CF1, CF2, and CF3 may be disposed corresponding to the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B, respectively. The first to third color filters CF1, CF2, and CF3 may be disposed corresponding to the first to third controllers CCP1, CCP2, and CCP3, respectively.

[0100] In addition, a plurality of filters CF1, CF2, CF3 that transmit different color lights may be arranged in a superimposed manner in the peripheral area NPXA arranged between the pixel areas PXA-R, PXA-G, PXA-B. A plurality of filters CF1, CF2, CF3 may be arranged in a superimposed manner in the direction of a third directional axis DR3, which is the thickness direction, to divide the boundary between the adjacent light-emitting areas PXA-R, PXA-G, PXA-B. Meanwhile, unlike the illustration, the color filter layer CFL may include a light-shielding portion (not shown) to divide the boundary between the adjacent filters CF1, CF2, CF3. The light-shielding portion (not shown) may be formed of a blue filter, or may be formed of an organic light-shielding material or an inorganic light-shielding material containing a black pigment or a black dye. The color filter layer CFL may include a low refractive layer LR. The low refractive layer LR may be arranged between the light control layer CCL and the filters CF1, CF2, CF3. The low refractive layer LR is disposed above (on the upper part of) the light control layer CCL and may block the light control parts CCP1, CCP2, and CCP3 from being exposed to moisture / oxygen. The low refractive layer LR may also be disposed between the light control parts CCP1, CCP2, and CCP3 and the filters CF1, CF2, and CF3 and may function as an optical functional layer to increase light extraction efficiency or prevent reflected light from entering the light control layer CCL. The low refractive layer LR may be a layer having a smaller refractive index than adjacent layers.

[0101] The low refractive layer LR may include at least one inorganic layer. For example, the low refractive layer LR may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, or a metal thin film having a high light transmittance. However, the embodiment is not limited thereto, and the low refractive layer LR may include an organic film. For example, the low refractive layer LR may be formed by including a polymer resin and inorganic particles. The low refractive layer LR may be composed of a single layer or multiple layers.

[0102] On the other hand, in the display device DD of one embodiment, the filters CF1, CF2, CF3 of the color filter layer CFL can be disposed directly on the light control layer CCL, in which case the low refractive layer LR can be omitted.

[0103] In one embodiment, the upper panel OP may further include a base substrate BL disposed on the color filter layer CFL. The base substrate BL may be a member providing a base surface on which the color filter layer CFL, the light control layer CCL, etc. are disposed. The base substrate BL may be a glass substrate, a metal substrate, a plastic substrate, etc. However, the embodiment is not limited thereto, and the base substrate BL may be an inorganic layer, an organic layer, or a composite material layer. Also, unlike the illustrated embodiment, the base substrate BL may be omitted.

[0104] The divided pattern BMP may include a material having a transmittance below a predetermined value. For example, the divided pattern BMP may include a black coloring agent to block light. The divided pattern BMP may include a black dye or a black pigment mixed into a base resin. In one embodiment, the black agent may include carbon black or a metal such as chromium or an oxide thereof.

[0105] An opening BW-OH may be defined in the division pattern BMP. The opening BW-OH may correspond to the pixel regions PXA-R, PXA-G, PXA-B or the bank well region BWA. Meanwhile, the opening BW-OH defined in correspondence with the pixel regions PXA-R, PXA-G, PXA-B may overlap with the light-emitting opening OH. On a plane, the opening BW-OH may have an area larger than that of the light-emitting opening OH. However, the embodiment is not limited thereto.

[0106] 6 is a cross-sectional view of a light control layer according to an embodiment. FIG 6 may show a portion of the upper panel OP (FIG 4) according to an embodiment. The light control layer according to an embodiment shown in FIG 6 may be included in a light control member according to an embodiment.

[0107] 6, the light control layer CCL of one embodiment may include light control parts CCP1 and CCP2 divided into a base resin region BRA and light conversion regions R-QDA and G-QDA. The light control layer CCL of one embodiment may further include a light control part CCP3 divided into a base resin region BRA and a ligand region LGA.

[0108] In one embodiment, the first light controller CCP1 may include a base resin region BRA and a red light conversion region R-QDA that converts the source light into a first color light, and the second light controller CCP2 may include a base resin region BRA and a green light conversion region G-QDA that converts the source light into a second color light. The source light is generated and provided from the light emitting element EMD included in the lower panel DP (FIG. 4) in the display device of the above-mentioned embodiment, and the source light may be light including blue, the first color light may be red light, and the second color light may be green light.

[0109] In the light control layer CCL, the first light controller CCP1 may include first quantum dots that convert source light provided from the light emitting element EMD (FIG. 4) into a first color light, and the second light controller CCP2 may include second quantum dots that convert the source light into a second color light. The third light controller CCP3 may be a part that transmits the source light. For example, in one embodiment, the first light controller CCP1 may emit red light, which is the first color light, and the second light controller CCP2 may emit green light, which is the second color light. The third light controller CCP3 may transmit and emit at least a part of the source light provided from the light emitting element EMD (FIG. 4). In one embodiment, the first quantum dots may be red quantum dots, and the second quantum dots may be green quantum dots.

[0110] The base resin region BRA included in the light control units CCP1, CCP2, and CCP3 may be a portion including a polymer derived from at least one monomer selected from the group consisting of an acrylate-based monomer, a urethane-based monomer, and an epoxy-based monomer. The base resin region BRA may include an acrylate-based polymer resin, a urethane-based polymer resin, or an epoxy-based polymer resin.

[0111] For example, in one embodiment, the monomers may include at least one of lauryl acrylate, lauryl methacrylate, hydroxypropyl methacrylate, 3,5,5-trimethylhexyl acrylate, glycidyl methacrylate, tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, benzyl methacrylate, and cyclohexyl methacrylate, but are not limited thereto.

[0112] The base resin region BRA may be a portion formed by polymerizing at least one monomer selected from the group consisting of acrylate monomers, urethane monomers, and epoxy monomers, using heat or ultraviolet light. The base resin region BRA may include polymer chains PC (FIGS. 7a and 7b) formed by polymerizing the monomers. The polymer chains PC (FIGS. 7a and 7b) may form a network in the base resin region BRA.

[0113] Fig. 7a is a diagram showing a portion of a light control layer according to an embodiment. Fig. 7a may show a portion corresponding to the AA' region in Fig. 6. However, the description of the portion shown in Fig. 7a may also be applied to the second light controller CCP in Fig. 6. In Fig. 7a, the light conversion region QDA may correspond to the red light conversion region R-QDA of the first light controller CCP1 and the green light conversion region G-QDA of the second light controller CCP2 in Fig. 6.

[0114] 7a, the light control unit CCP may include a base resin region BRA and a light conversion region QDA that is separated as a region different from the base resin region BRA. The light conversion region QDA may include a quantum dot QD and a light converter M-QD including a liquid crystal ligand LGD bonded to the surface of the quantum dot QD.

[0115] FIG. 7a shows a schematic shape of the light converter M-QD, and the number of liquid crystal ligands LGD bonded to the surface of the quantum dot QD is not limited to that shown. In one embodiment, the light converter M-QD may be arranged in an aggregation state in the light conversion region QDA. A plurality of light converters M-QD may be arranged in an aggregation state in each of the light conversion regions R-QDA and G-QDA shown in FIG. 6. Meanwhile, the red light conversion region R-QDA may be arranged with a light converter including a red quantum dot and a liquid crystal ligand bonded to the surface of the red quantum dot, and the green light conversion region G-QDA may be arranged with a light converter including a green quantum dot and a liquid crystal ligand bonded to the surface of the green quantum dot.

[0116] In one embodiment, the quantum dot QD may have a core-shell structure, and the core of the quantum dot may be selected from II-VI compounds, III-VI compounds, I-III-VI compounds, III-V compounds, IV-VI compounds, Group IV elements, Group IV compounds, and combinations thereof.

[0117] The II-VI compounds include binary compounds selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgT ternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof; and quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof.

[0118] III-VI compounds include In 2 S 3 , In 2 Se3 Binary compounds such as InGaS 3 , InGaSe 3 etc., or any combination thereof.

[0119] Group I-III-VI compounds include AgInS, AgInS 2 , CuInS, CuInS 2 , AgGaS 2 , CuGaS 2 ,CuGaO 2 , AgGaO 2 , AgAlO 2 and mixtures thereof, or AgInGaS 2 , CuInGaS 2 The compound may be selected from quaternary compounds such as:

[0120] The III-V compound may be selected from the group consisting of binary compounds selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof, ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb, and mixtures thereof, and quaternary compounds selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. Meanwhile, the III-V compound may further comprise a group II metal. For example, InZnP may be selected as the III-II-V compound.

[0121] The IV-VI compound may be selected from the group consisting of binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof, ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof, and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. The group IV element may be selected from the group consisting of Si, Ge, and mixtures thereof. The group IV compound may be a binary compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0122] Here, the binary, ternary, or quaternary compounds may be present in a particle with a uniform concentration, or may be present in the same particle with partially different concentration distributions. Also, a quantum dot may have a core-shell structure in which one quantum dot surrounds another quantum dot. In the core-shell structure, the concentration of an element present in the shell may have a concentration gradient that decreases as it approaches the core.

[0123] In some embodiments, the quantum dot QD may have a core-shell structure including a core containing the nanocrystals described above and a shell surrounding the core. The shell of the quantum dot may act as a protective layer to prevent chemical denaturation of the core and maintain the semiconducting properties, and / or as a charging layer to provide electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. Examples of the shell of the quantum dot may include metal or nonmetal oxides, semiconducting compounds, or combinations thereof.

[0124] For example, the metal or nonmetal oxide is SiO 2 , Al 2 O 3 , TiO 2 , ZnO, MnO, Mn 2 O 3 , Mn 3 O 4, CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 , binary compounds such as NiO, or MgAl 2 O 4 , CoFe 2 O 4 , NiFe 2 O 4 , CoMn 2 O 4 However, the present invention is not limited thereto.

[0125] Examples of the semiconductor compound include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb, but the present invention is not limited to these.

[0126] The quantum dots QDs have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, more preferably about 30 nm or less, and in this range, the color purity and color reproducibility are improved. In addition, since the light emitted through such quantum dots is emitted in all directions, the light viewing angle can be improved.

[0127] The shape of the quantum dots (QDs) may be any shape commonly used in the art, and is not particularly limited. More specifically, the shapes of the quantum dots (QDs) may be spherical, pyramidal, multi-arm, cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplatelets, and the like.

[0128] The quantum dot QD can adjust the hue of the light emitted depending on the particle size, and accordingly, the quantum dot can have various emission hues such as blue, red, and green. The smaller the particle size of the quantum dot QD, the shorter the wavelength region of light it can emit. For example, in quantum dot QDs having the same core, the particle size of the quantum dot emitting green light may be smaller than the particle size of the quantum dot emitting red light. In addition, in quantum dot QDs having the same core, the particle size of the quantum dot emitting blue light may be smaller than the particle size of the quantum dot emitting green light. However, the embodiment is not limited thereto, and the particle size of quantum dots having the same core may be adjusted depending on the shell forming material and shell thickness.

[0129] Meanwhile, if quantum dots (QDs) have various emission hues such as blue, red, and green, quantum dots having different emission colors may have different core materials.

[0130] In one embodiment, the first light controller CCP1 may include a first light converter including a first quantum dot excited by the source light to emit a first light and a liquid crystal ligand bound to the surface of the first quantum dot, and the second light controller CCP2 may include a second light converter including a second quantum dot excited by the source light to emit a second light and a liquid crystal ligand bound to the surface of the second quantum dot. That is, in the red light conversion region R-QDA, a light converter M-QD including a red quantum dot and a liquid crystal ligand bound to the surface of the red quantum dot may be arranged, and in the green light conversion region G-QDA, a light converter M-QD including a green quantum dot and a liquid crystal ligand bound to the surface of the green quantum dot may be arranged.

[0131] In one embodiment, the light converter M-QD may include a liquid crystal ligand LGD bonded to the surface of the quantum dot QD. If the quantum dot QD has a core-shell structure, the liquid crystal ligand LGD may be bonded to the surface of the shell. The liquid crystal ligand LGD has a liquid crystal molecular structure, and due to the characteristics of the liquid crystal molecules having different lengths of the long axis and the short axis, the liquid crystal ligand LGD may have a refractive index anisotropy. Therefore, the light converter M-QD including the liquid crystal ligand LGD may exhibit a high light scattering effect. In one embodiment, the liquid crystal ligand LGD attached (bonded) to the surface of the quantum dot QD may scatter the light emitted from the quantum dot QD.

[0132] In addition, the liquid crystal ligand LGD can increase the cohesion of the light conversion body M-QD. The light conversion body M-QD containing the liquid crystal ligand LGD can be densely packed and aligned with each other due to the interaction between the liquid crystal ligands M-QD, and thus a plurality of light conversion bodies M-QD can be coagulated to form a light conversion region QDA separated from the base resin region BRA.

[0133] 6 and 7a, in each of the first light controller CCP1 and the second light controller CCP2, the refractive indexes of the base resin region BRA and the light conversion regions R-QDA and G-QDA may be different from each other. That is, the refractive indexes of the base resin region BRA and the red light conversion region R-QDA may be different from each other, and the refractive indexes of the base resin region BRA and the green light conversion region G-QDA may be different from each other.

[0134] In one embodiment, the first light control unit CCP1 and the second light control unit CCP2 may be phase-separated into two regions that are separated from each other by different refractive indexes. The boundary that defines the light conversion regions R-QDA and G-QDA may be determined by the adjacent base resin region BRA. The base resin region BRA and the light conversion regions R-QDA and G-QDA may be arranged in a random manner. For example, the arrangement of the two regions that are separated into the base resin region BRA and the light conversion regions R-QDA and G-QDA may have a fingerprint pattern. The base resin region BRA and the light conversion regions R-QDA and G-QDA may be arranged in a random manner or may be arranged without regularity while having an extended deformed lamellar structure, and the light conversion regions R-QDA and G-QDA may be divided by forming domains with the base resin region BRA as a matrix.

[0135] The light path of the light incident on the first light controller CCP1 and the second light controller CCP2 may be changed at the boundary between the base resin region BRA and the light conversion regions R-QDA and G-QDA, which have different refractive indices. As a result, the light incident on the first light controller CCP1 and the second light controller CCP2 may be scattered in various directions within the first light controller CCP1 and the second light controller CCP2. In one embodiment, the first light controller CCP1 and the second light controller CCP2 are sufficiently excited by the source light scattered in various directions to emit light converted from the light, and thus may exhibit high light extraction efficiency.

[0136] 7b is a diagram showing a portion of a light control layer according to an embodiment, which may correspond to the area BB′ in FIG.

[0137] 6 and 7b, the third light control unit CCP3 may include a base resin region BRA and a ligand region LGA that is defined as a region different from the base resin region BRA. The ligand region LGA may be a portion where a plurality of liquid crystal ligands LGD are aggregated and arranged. The ligand region LGA may include a ligand assembly M-LGD in which a plurality of liquid crystal ligands LGD are aggregated.

[0138] The liquid crystal ligands LGD are aggregated by interaction with each other, and a ligand region LGA separated from the base resin region BRA may be formed in the third light control unit CCP3.

[0139] Each of the liquid crystal ligands LGD constituting the ligand assembly M-LGD has a liquid crystal molecular structure and may have refractive index anisotropy due to the characteristics of the liquid crystal molecules having different lengths of the long axis and the short axis. Therefore, the ligand-free M-LGD containing the liquid crystal ligand LGD may exhibit a high light scattering effect. In addition, in one embodiment, the base resin region BRA and the ligand region LGA included in the third light control unit CCP3 have different refractive indices, so that the light path of the light incident on the third light control unit CCP3 is changed at each of the ligand assembly M-LGD or at the boundary between the base resin region BRA and the ligand region LGA, and thus the light can be effectively scattered.

[0140] 6 and 7b, in the third light controller CCP3, the refractive indexes of the base resin region BRA and the ligand region LGA may be different from each other. That is, in one embodiment, the third light controller CCP3 may be phase-separated into two regions that are separated from each other by different refractive indexes. The boundary defining the ligand region LGA may be determined by the adjacent base resin region BRA. The base resin region BRA and the ligand region LGA may be arranged in a random manner. For example, the arrangement of the two regions separated into the base resin region BRA and the ligand region LGA may have a fingerprint pattern. The base resin region BRA and the ligand region LGA may be arranged in a random manner or may be arranged without regularity while having an extended deformed lamellar structure, and the ligand region LGA may be divided by forming a domain with the base resin region BRA as a matrix. Meanwhile, in the case of the third light controller CCP3, the area ratio of the base resin region BRA in the light controller may be larger than that of the first and second light controllers CCP1 and CCP2.

[0141] The light path of the light incident on the third light controller CCP3 may be changed at the boundary between the base resin region BRA and the ligand region LGA, which have different refractive indices, so that the light incident on the third light controller CCP3 may be scattered in various directions. In one embodiment, the light transmission efficiency of the third light controller CCP3 may be increased.

[0142] In FIG. 7a and FIG. 7b, the liquid crystal ligand LGD contained in the light converter M-QD and the liquid crystal ligand LGD constituting the ligand assembly M-LGD can be represented by the following Chemical Formula 1, respectively.

[0143] <Chemical formula 1> JPEG2025508655000007.jpg3386

[0144] In Chemical Formula 1, a and b are each independently an integer of 1 to 3, and n can be 0 or 1. Cx and Cy are each independently a benzene ring or a cyclohexane ring, L can be a divalent ester (COO) group, a divalent ethylene group, a divalent methoxy group, a divalent acetylene group, or a divalent amine group, R is a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, or a nitro group, and X and Y are each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a cyano group, or a halogen atom.

[0145] In the liquid crystal ligand LGD represented by Chemical Formula 1, X and Y are terminal groups, and one of them can be bonded (attached) to the surface of the quantum dot QD. One of the terminal groups of X and Y is bonded (attached) to the surface of the quantum dot QD, and the remaining terminal group can be adjacent to the liquid crystal ligand LGD portion of the adjacent light converter M-QD or adjacent to the base resin region BRA.

[0146] In Chemical Formula 1, the portion represented by "L" may be a linker. The linker may be a portion that connects adjacent ring groups to each other. In one embodiment, the linker portion may be omitted.

[0147] For example, in one embodiment, the liquid crystal ligand LGD may be represented by any one of the following formulas LD-1 to LD-3: wherein R in LD-1 is as defined in Formula 1.

[0148] JPEG2025508655000008.jpg29126

[0149] JPEG2025508655000009.jpg2776

[0150] JPEG2025508655000010.jpg2679

[0151] 6 and 7a, in the light control layer CCL according to an embodiment, the first and second light control parts CCP1 and CCP2 include the base resin region BRA and the light conversion regions R-QDA and G-QDA, which are phase-separated into domains different from the base resin region BRA and include the light conversion body M-QD, and thus can exhibit excellent light extraction efficiency. The light incident on the first light control part CCP1 and the second light control part CCP2 can effectively convert the light path due to the difference in refractive index between the base resin region BRA and the light conversion regions R-QDA and G-QDA, and can effectively excite the entire light conversion body M-QD. In addition, the light excited by the incident light, converted by the light conversion body M-QD, and emitted can also be effectively scattered at the boundary between the liquid crystal ligand LGD and the base resin region BRA and the light conversion regions R-QDA and G-QDA to be emitted. Therefore, the light control layer CCL including the base resin region BRA and the light conversion regions R-QDA and G-QDA that are phase-separated while having refractive indices different from each other can exhibit excellent light extraction efficiency.

[0152] 6 and 7b, in the light control layer CCL according to an embodiment, the third light control part CCP3 includes a base resin region BRA and a ligand region LGA that is phase-separated into domains different from the base resin region BRA and includes a ligand assembly M-QD, and thus exhibits excellent light extraction efficiency. The light incident on the third light control part CCP3 undergoes conversion of the light path due to the difference in refractive index between the base resin region BRA and the ligand region LGA and the refractive index anisotropy of the liquid crystal ligand LGD, and can be effectively scattered and emitted. Therefore, the light control layer CCL including the base resin region BRA and the ligand region LGA that are phase-separated while having different refractive indexes from each other can exhibit excellent light extraction efficiency.

[0153] Meanwhile, in one embodiment, the light control layer CCL may not include a scatterer. The first light control unit CCP1 and the second light control unit CCP2 may each be composed of a base resin region BRA containing a polymer and a light conversion region QDA in which light conversion bodies made of quantum dots and liquid crystal ligands are arranged, and may not include a scatterer. The third light control unit CCP3 may be composed of a base resin region BRA containing a polymer and a ligand region LGA made of a liquid crystal ligand, and may not include a scatterer. That is, in one embodiment, the light control layer CCL may be composed of TiO 2 , ZnO, Al 2 O 3 , SiO 2 , or the scatterer-free portion of an inorganic particle such as hollow silica.

[0154] The light control layer CCL of one embodiment does not include a scatterer such as inorganic particles, and therefore can exhibit low external light reflectance, except for the phenomenon in which external light incident on the light control parts CCP1, CCP2, and CCP3 is reflected from the scatterer. That is, the light control layer CCL of one embodiment exhibits low reflectance characteristics by not including a scatterer, and can simultaneously exhibit excellent light extraction efficiency by including the first and second light control parts CCP1 and CCP2 including the base resin region BRA and the light conversion region QDA that are phase-separated and separated from each other, and the base resin region BRA and the ligand region LGA that are phase-separated and separated from each other.

[0155] In addition, in the light control layer CCL of one embodiment, the resin composition used to manufacture the light control parts CCP1, CCP2, and CCP3 does not contain a scatterer, so that the non-uniformity due to the degree of settling of the scatterer in the resin composition supplied through the nozzle can be improved. As a result, the light control parts CCP1, CCP2, and CCP3 of one embodiment formed from the resin composition not containing a scatterer can improve the problem of poor appearance due to the difference in distribution of the scatterer. In addition, in the case of a resin composition not containing a scatterer, the clogging phenomenon due to the scatterer in the nozzle supplying the resin composition is improved, so that the production efficiency of the light control layer can be improved.

[0156] In one embodiment, the first light controller CCP1 may include a red light converter at 20 wt% to 60 wt% based on the total weight of the first light controller CCP1 (100 wt%). The second light controller CCP2 may include a green light converter at 20 wt% to 60 wt% based on the total weight of the second light controller CCP2 (100 wt%). The red light converter and the green light converter each include a quantum dot and a liquid crystal ligand bonded to the surface of the quantum dot. In one embodiment, the first light controller CCP1 and the second light controller CCP2 each include a light converter at a weight ratio of 20 wt% to 60 wt%, so that the base resin region BRA and the light conversion regions R-QDA and G-QDA can effectively undergo phase separation, and therefore the first light controller CCP1 and the second light controller CCP2 can exhibit the desired color reproducibility and light extraction efficiency.

[0157] In one embodiment, the third light control unit CCP3 may contain 5 wt% to 10 wt% of liquid crystal ligand based on a total weight of 100 wt% of the third light control unit CCP3. In one embodiment, the third light control unit CCP3 contains 5 wt% to 10 wt% of liquid crystal ligand by weight ratio, so that phase separation can effectively occur between the base resin region BRA and the ligand region LGA, and excellent light extraction efficiency can be exhibited.

[0158] FIG. 8 is a diagram illustrating an example of a step of a method for manufacturing a light control unit according to an embodiment.

[0159] Referring to Figure 8, a light-converting resin composition QIK including a monomer PBR and a light-converting substance M-QD dispersed in the monomer PBR can be polymerized to form a light control unit CCP including a base resin region BRA and a light-converting region QDA.

[0160] The photoconversion resin composition QIK may be polymerized using ultraviolet light (UV), but the embodiment is not limited thereto, and the photoconversion resin composition QIK may be polymerized by heat.

[0161] In the polymerization process of the photoconversion resin composition QIK, the photoconversion resin composition QIK can be phase-separated into a base resin region BRA, which is a polymer rich phase containing a polymer formed from the polymerization of the monomer PBR, and a photoconversion region QDA, which is a quantum dot rich phase consisting of aggregated photoconverters M-QDs. In other words, the photoconversion resin composition QIK can be phase-separated into a base resin region BRA and a photoconversion region QDA by polymerization-induced phase separation (PIPS).

[0162] Meanwhile, although not shown, in the third light control part CCP3 (FIG. 6), the monomer and the liquid crystal ligand dispersed in the monomer can be phase-separated into a base resin region BRA which is a polymer-rich phase and a ligand region LGA which is a ligand-rich phase by the polymerization process of the monomer. In other words, the base resin region BRA and the ligand region LGA in the third light control part CCP3 (FIG. 6) can also be regions formed by being separated by polymerization-induced phase separation (PIPS).

[0163] FIG. 9 is a diagram illustrating an example of a light extraction phenomenon in a light controller according to an embodiment. Referring to FIG. 9, the light controller CCP according to an embodiment may include a base resin region BRA and a light conversion region QDA that are separated from each other. A cross section of the light controller CCP along the third directional axis DR3 may have a fingerprint pattern consisting of an arrangement of the base resin region BRA and the light conversion region QDA that are separated from each other. That is, the light controller CCP according to an embodiment may show a pattern formed by dividing two domains having different physical / chemical properties while defining the boundaries between them and randomly arranging them. For example, one cross section of the light controller CCP may show a shape as shown in FIG. 9, but this is merely an example, and the light controller CCP may have a cross section in which two mutually separated domains are arranged crossing each other in a random shape.

[0164] The width (W BRA , W QDA ) may be about 1 μm. For example, the width (W BRA , W QDA ) may be 1 μm or less. When considering the degree of light scattering according to the size of the particles in consideration of the Mie scattering peak, if the two regions of the base resin region BRA and the light conversion region QDA, which have different refractive indices from each other, each have a width of about 1 μm or less, the degree of light scattering in the light control unit CCP may be increased.

[0165] On the other hand, the base resin region BRA and the light conversion region QDA each have a random shape induced during the polymerization process, so that the width (W BRA , W QDA ) is the width (W ) of each of the base resin regions BRA measured based on one direction (for example, a direction perpendicular to the third direction DR3 in this specification). BRA ) and the width (W QDA ) can be the average value of

[0166] The light BLR incident on the light controller CCP according to an embodiment may be bent at the boundary between the base resin region BRA and the light conversion region QDA and proceed. The light BLR incident in one direction may be bent and transmitted in different directions while passing through the light controller CCP, and the directions SL1 and SL2 of the emitted light may be more than two directions. Therefore, although the light controller CCP according to an embodiment does not include a scatterer, it may exhibit excellent light scattering effect and light extraction efficiency due to the change in the light path caused by the difference in the refractive index in two different regions.

[0167] The following Table 1 shows the results of evaluating the optical characteristics of the optical control sections of the comparative example and the example. The comparative example and the example were each manufactured to have a film thickness of 9 μm.

[0168] The resin composition used in the manufacture of the optical control unit of the comparative example was an acrylate monomer, quantum dots, and TiO 2 The resin composition used in the manufacture of the light control unit in the embodiment contains an acrylic monomer and a light conversion body, but does not contain TiO 2 The light conversion body of the embodiment may be the quantum dot used in the comparative example to which a liquid crystal ligand is bound.

[0169] In Table 1, the light absorption rate indicates the absorption rate of light provided to the light control unit of the comparative example and the example, and the light extraction efficiency indicates the ratio of light emitted from the light control unit to the provided light. The reflectance indicates the SCI reflectance in the light control unit of the comparative example and the example when external light is provided. The presence or absence of phase separation was observed by FIB-SEM images to determine the presence or absence of phase separation in the light control unit after polymerization of the resin composition.

[0170] [Table 1]

[0171] With reference to the results in Table 1, it can be seen that the examples show similar light absorption rates and phase-separated characteristics compared to the comparative examples. In addition, it can be seen that the light control unit of the examples shows light extraction efficiency at the same level or higher than the light control unit of the comparative examples, and shows reflectance characteristics reduced by 10% or more compared to the comparative examples. That is, from the results in Table 1, it can be seen that the light control unit of the example including two regions separated by phase separation without including a scatterer shows excellent light extraction efficiency and reduced reflectance characteristics compared to the light control unit including a conventional scatterer. FIG. 10 is a graph showing the characteristics of the light control unit of the comparative example and the example. The comparative example and the example in FIG. 10 show the reflectance of the light control unit provided between the division patterns BMP (FIG. 4) evaluated. In FIG. 10, the X-axis corresponds to the light conversion efficiency EQE converted to light in the wavelength region of 430 nm to 480 nm, and the Y-axis shows the relative reflectance of the light control unit of the comparative example and the example when the SCI reflectance in the division pattern BMP (FIG. 4) is set to 1%. The light control sections of the comparative example and the example used in FIG. 10 correspond to the light control sections made of the resin compositions of the comparative example and the example in Table 1 above, respectively.

[0172] 10, it can be seen that the optical control unit of the embodiment has a lower external light reflectance than the optical control unit of the comparative example when the optical control unit has the same optical conversion efficiency EQE. That is, at the same optical conversion efficiency EQE, the SCI reflectance of the optical control unit of the embodiment can be reduced by 10% or more based on the reflectance of the optical control unit of the comparative example.

[0173] In other words, in the case of a light control layer according to one embodiment, which includes a light control section including a phase-separated region without including a scatterer, it can be seen that, when showing the same level of light extraction efficiency, compared to a light control layer including a conventional light control section including a scatterer, it shows the effect of significantly reducing reflection due to external light.

[0174] The light control member according to one embodiment described with reference to Figures 6 to 10 etc. exhibits excellent light extraction efficiency by including a light control layer including a base resin region and a light conversion region in which multiple light converters are condensed and arranged, and can exhibit reduced reflectance characteristics by not including a scatterer.

[0175] The display device DD according to the embodiment described with reference to Figures 1 to 5 may include an upper panel OP including the light control layer according to the embodiment described above. The light control layer CCL included in the upper panel OP of the display device DD may be the same as that described with reference to Figures 6 to 10.

[0176] The light control member of the embodiment includes a base resin region and a light conversion region that are separated from each other, and the light conversion region includes a light converter including quantum dots and a liquid crystal ligand, thereby exhibiting good light extraction efficiency and low reflection characteristics. In addition, the display device of the embodiment includes a base resin region and a light conversion region on a lower panel including a display element layer, and the light conversion region includes an upper panel including a light converter including quantum dots and a liquid crystal ligand, thereby realizing high light extraction rate and low reflection characteristics, and thus exhibiting excellent display quality.

[0177] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art or those having ordinary knowledge in the art that various modifications and variations of the present invention can be made without departing from the spirit and technical scope of the present invention as set forth in the claims below.

[0178] Therefore, the technical scope of the present invention should be determined not by the contents described in the detailed description of the specification, but by the claims. [Industrial Applicability]

[0179] In a display device, a quantum dot material is used in a light control unit, and in order to improve the display quality of the display device, there is a need for technological development to increase the light conversion efficiency or light transmission efficiency of the light control unit. The light control member of the present invention includes a base resin region and a light conversion region that are separated from each other, and the light conversion region includes a light converter including quantum dots and a liquid crystal ligand, thereby exhibiting good light extraction efficiency and low reflection characteristics. In addition, the display device of the present invention includes a base resin region and a light conversion region on a lower panel including a display element layer, and the light conversion region includes an upper panel including a light converter including quantum dots and a liquid crystal ligand, thereby embodying high light extraction rate and low reflection characteristics, and thus exhibiting excellent display quality. Therefore, the present invention has high industrial applicability.

Claims

1. A light control layer including a base region and a light conversion region in which a plurality of light converters are condensed and arranged, Each of the optical converters is Quantum dots and and a liquid crystal ligand bound to the surface of the quantum dot.

2. The light control member according to claim 1 , wherein the base resin region and the light conversion region have mutually different refractive indices.

3. The light control member according to claim 1 , wherein the base resin region includes a polymer derived from at least one monomer selected from the group consisting of an acrylate monomer and an epoxy monomer.

4. 2 . The light control member according to claim 1 , wherein the quantum dots are red quantum dots that emit red light when excited by blue or green light, or green quantum dots that emit green light when excited by the blue light.

5. The light control member according to claim 1 , wherein the liquid crystal ligand is represented by the following chemical formula 1: <Chemical formula 1> In the above Chemical Formula 1, a and b each independently represent an integer of 1 or more and 3 or less, n is 0 or 1; Cx and Cy each independently represent a benzene ring or a cyclohexane ring; L is a divalent ester (COO) group, a divalent ethylene group, a divalent methoxy group, a divalent acetylene group, or a divalent amine group; R is a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, or a nitro group; X and Y each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a cyano group, or a halogen atom.

6. The light control member according to claim 5, wherein the liquid crystal ligand is represented by any one of the following LD-1 to LD-3: In the LD-1, R is as defined in Formula 1.

7. The base resin region and the light conversion region are The light control member according to claim 3 , which is a region that is separated from each other by phase separation during polymerization of a light-converting resin composition containing the monomer and the light converter dispersed in the monomer.

8. The light control member according to claim 7 , wherein a cross section of the light control layer has a base resin region and a fingerprint pattern formed by an arrangement of the light conversion regions, the base resin region and the light conversion regions being separated from each other.

9. The light control layer includes a division pattern in which a plurality of openings are defined, and first to third light control units are disposed in the respective openings, the first light control section includes the base resin region and a red light conversion region, the second light control section includes the base resin region and a green light conversion region, The light control member according to claim 1 , wherein the third light control portion includes the base resin region and a ligand region in which the liquid crystal ligand is arranged in an aggregated manner.

10. The light control member according to claim 9 , wherein the refractive index of the base resin region is different from the refractive indexes of the red light conversion region, the green light conversion region, and the ligand region.

11. the red light conversion region includes a red light conversion body including a red quantum dot that is excited by blue light or green light to emit red light, and the liquid crystal ligand bound to a surface of the red quantum dot; The light control member according to claim 9 , wherein the green light conversion region includes a green light conversion body including green quantum dots that are excited by the blue light to emit green light, and the liquid crystal ligands that are bound to surfaces of the green quantum dots.

12. In the first light control unit, the red light conversion body is contained in an amount of 20 wt % to 60 wt % based on a total weight of the first light control unit (100 wt %), The light control member according to claim 11 , wherein the second light control portion includes the green light converter in an amount of 20 wt % to 60 wt % based on a total weight of the second light control portion (100 wt %).

13. The light control member according to claim 9 , wherein the liquid crystal ligand is contained in the third light control portion in an amount of 5 wt % to 10 wt % based on a total weight of the third light control portion (100 wt %).

14. The light control member according to claim 9, further comprising a color filter layer disposed on the light control layer and including a first filter, a second filter, and a third filter corresponding to the first light control section, the second light control section, and the third light control section, respectively.

15. a lower panel including a display element layer having light emissive regions defined therein; an upper panel including a light control layer including a division pattern that is disposed on the lower panel and defines an opening that overlaps the light emitting region, and a light control unit that is disposed in the opening; The light control layer includes a base resin region and a light conversion region in which a plurality of light converters are arranged in an aggregated manner, Each of the optical converters is Quantum dots and and liquid crystal ligands bound to the surfaces of the quantum dots.

16. The display device according to claim 15 , wherein the base resin region and the light conversion region have refractive indices different from each other.

17. The display device according to claim 15 , wherein the base resin region includes a polymer derived from at least one monomer selected from the group consisting of an acrylate-based monomer and an epoxy-based monomer.

18. The display device according to claim 15, wherein the liquid crystal ligand is represented by the following chemical formula 1: <Chemical formula 1> In the above Chemical Formula 1, a and b each independently represent an integer of 1 or more and 3 or less, n is 0 or 1; Cx and Cy each independently represent a benzene ring or a cyclohexane ring; L is a divalent ester (COO) group, a divalent ethylene group, a divalent methoxy group, a divalent acetylene group, or a divalent amine group; R is a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, or a nitro group; X and Y each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group, a cyano group, or a halogen atom.

19. The display device according to claim 15 , wherein a cross section of the light control layer has base resin regions separated from each other and a fingerprint pattern formed by an arrangement of the light conversion regions.

20. The light control layer is a first light control portion including the base resin region and a red light conversion region separated from the base resin region; A second light control section including the base resin region and a green light conversion region partitioned from the base resin region; The display device according to claim 15 , further comprising: a third light control section including the base resin region; and a ligand region that is partitioned from the base resin region and in which the liquid crystal ligands are arranged in an aggregated manner.

21. The display device of claim 20 , wherein the refractive index of the base resin region is different from the refractive indexes of the red light conversion region, the green light conversion region, and the ligand region.

22. In the first light control unit, the red light conversion body is contained in an amount of 20 wt % to 60 wt % based on a total weight of the first light control unit (100 wt %), In the second light control unit, the green light converter is included in an amount of 20 wt % to 60 wt % based on a total weight of the second light control unit (100 wt %), The display device of claim 20 , wherein the liquid crystal ligand is contained in the third light controller in an amount of 5 wt % to 10 wt %, based on a total weight of the third light controller being 100 wt %.

23. the display element layer includes a first electrode, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer, and includes a light-emitting element that outputs source light; The first light control unit includes a first light conversion body that converts the source light into a first color light, The second light control unit includes a second light converter that converts the source light into a second color light, The display device according to claim 20 , wherein the third light control unit transmits the source light.

24. The first light conversion body includes a first quantum dot that is excited by the source light to emit the first light, and a liquid crystal ligand that is bound to a surface of the first quantum dot; The display device according to claim 23 , wherein the second light conversion body includes a second quantum dot that is excited by the source light to emit the second light, and a liquid crystal ligand that is bound to a surface of the second quantum dot.

25. The top panel comprises: disposed on the upper side of the light control layer, A first filter that is superimposed on the first light control unit and transmits the first light; A second filter that is superimposed on the second light control unit and transmits the second light; The display device according to claim 23 , further comprising a filter layer including a third filter overlapping the third light control portion and transmitting the source light.

26. The display device according to claim 15 , wherein the light control section does not include a scatterer.

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