Display device and method for manufacturing display device

Abstract

The invention relates to a display device and a method for manufacturing the same. A display device having improved luminance characteristics and superior display quality includes: a display layer for emitting source light; and a light control layer disposed on the display layer to transmit the source light or wavelength-convert the source light, in which the light control layer may include a blue light control portion for emitting blue light, a green light control portion for emitting green light, and a red light control portion for emitting red light, and the green light control portion may include a plurality of first quantum dots and a plurality of deformed scatterers, and the plurality of deformed scatterers may each include a core portion and a metal coating portion, in a cross section perpendicular to the display layer, a length of the core portion in a long side direction of the core portion may be 1.5 times or more of a length of the core portion in a short side direction of the core portion perpendicular to the long side direction, and the metal coating portion surrounds at least one of an upper portion and a lower portion of the core portion.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2023-0105618 filed on August 11, 2023 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device including a light control layer including quantum dots and a method for manufacturing the display device. Background Art

[0004] The display device includes a transmissive display device that selectively transmits source light generated from a light source and an luminescent display device that generates source light from the display device itself. The display device may include a light control portion according to different types of pixels to generate a color image. The light control portion may only transmit source light having a wavelength range (e.g., a selectable wavelength range or a predetermined wavelength range) or convert the color of the source light. Some light control portions may change the properties of the light without converting the color of the source light.

[0005] In a display device, a quantum dot material may be used in a light control portion, and for the purpose of improving the display quality of the display device, it is necessary to develop a technology that improves light conversion efficiency or light transmission efficiency in the light control portion. Summary of the invention

[0006] The present disclosure provides a display device having improved display quality by increasing the transmittance of source light.

[0007] The present disclosure also provides a method for manufacturing a display device having improved brightness by adjusting a diffuser included in a light-controlling portion and an arrangement of the diffuser.

[0008] An embodiment of the present invention provides a display device, which may include: a display layer for generating source light; and a light control layer, which is arranged on the display layer to transmit the source light or perform wavelength conversion on the source light, wherein the light control layer may include a red light control part for emitting red light, a green light control part for emitting green light, and a blue light control part for emitting the source light, the green light control part may include a plurality of first quantum dots and a plurality of deformed scatterers, the plurality of deformed scatterers may each include a core part and a metal coating part, in a cross section perpendicular to the display layer, the length of the core part in the long side direction of the core part may be 1.5 times or more of the length of the core part in the short side direction of the core part perpendicular to the long side direction, the metal coating part may surround at least one of the upper part and the lower part of the core part, and the upper part and the lower part of the core part may be spaced apart in the long side direction.

[0009] In an embodiment, the core portion may have a rod-like shape, and the metal coating portion may cover one surface of the core portion as an upper surface or a lower surface and a side surface extending from the one surface.

[0010] In an embodiment, the plurality of deformed scatterers may be arranged such that the long side direction may be perpendicular to an upper surface of the display layer.

[0011] In an embodiment, in each of the plurality of deformed scatterers, the length in the long side direction may be in the range of about 50 nm to about 500 nm, and the length in the short side direction may be in the range of about 20 nm to about 200 nm.

[0012] In an embodiment, the core portion may include TiO 2 、SiO 2 ,BaSO 4 、ZnO、Al 2 O 3 、CaCO 3 or a combination thereof.

[0013] In an embodiment, the metal coating portion may include Al, Cu, or a combination thereof.

[0014] In an embodiment, the source light may include blue light and green light.

[0015] In an embodiment, the source light may include blue light, green light, and red light, and the red light control portion may include the plurality of deformed scatterers and a plurality of second quantum dots, and the plurality of second quantum dots may be different from the plurality of first quantum dots.

[0016] In an embodiment, the blue light controlling portion may include a plurality of spherical scatterers.

[0017] In an embodiment, the display layer may include a light emitting element for emitting the source light, and the light emitting element may include a first electrode, a second electrode facing the first electrode, and a light emitting portion provided between the first electrode and the second electrode.

[0018] In an embodiment of the present invention, a display device may include: a first pixel region for emitting red light, a second pixel region for emitting green light, and a third pixel region for emitting blue light, wherein the first pixel region, the second pixel region, and the third pixel region are spaced apart from each other and do not overlap with each other in a plan view, and the display device may also include: a display panel including a light emitting element; and a light control panel disposed on the display panel, the light control panel may include a light control layer, the light control layer having a first light control portion corresponding to the first pixel region, a second light control portion corresponding to the second pixel region, and a light control portion corresponding to the third pixel region. A corresponding third light control part, wherein the second light control part may include a plurality of first quantum dots and a plurality of rod-shaped deformed scatterers, wherein the length of each of the plurality of rod-shaped deformed scatterers in a first direction parallel to the thickness direction of the light control layer may be approximately 1.5 times or greater than the length of each of the plurality of rod-shaped deformed scatterers in a second direction perpendicular to the first direction, and the plurality of rod-shaped deformed scatterers may each include a rod-shaped core portion and a metal coating portion surrounding at least one of the upper surface and the lower surface of the core portion, and the upper surface and the lower surface of the core portion may be spaced apart in the first direction.

[0019] In an embodiment, the core portion may include TiO 2 、SiO 2 ,BaSO 4 、ZnO、Al 2 O 3 、CaCO 3 or a combination thereof, and the metal coating portion may include Al, Cu, or a combination thereof.

[0020] In an embodiment, the light emitting element may emit source light including the blue light and the green light, the third light-controlling portion may include a spherical scatterer, and the first light-controlling portion may not have a scatterer.

[0021] In an embodiment, the light control panel may further include a color filter layer separated from the display panel and arranged on the light control layer, and the color filter layer may include a first color filter overlapping with the first pixel area in a plan view to transmit the red light, a second color filter overlapping with the second pixel area in a plan view to transmit the green light, and a third color filter overlapping with the third pixel area in a plan view to transmit the blue light.

[0022] In an embodiment of the present invention, a method for manufacturing a display device may include: forming a display panel that may include a light-emitting element; and forming a light control layer, wherein the forming of the light control layer may include: forming a segmentation pattern on a base portion, a plurality of openings may be defined in the segmentation pattern; and forming a blue light control portion, a green light control portion, and a red light control portion, each of the blue light control portion, the green light control portion, and the red light control portion corresponding to a respective one of the plurality of openings, and the forming of the green light control portion may include: disposing a quantum dot ink including green quantum dots and a plurality of deformed scatterers in a region corresponding to the green light in the plurality of openings. control part; aligning the plurality of deformed scatterers so that the plurality of long sides of the plurality of deformed scatterers can be parallel to the thickness direction of the green light control part; and curing the quantum dot ink after the alignment of the plurality of deformed scatterers, and each of the plurality of deformed scatterers may include: a core part, the length of the core part in the long side direction may be approximately 1.5 times or greater than the length of the core part in the short side direction perpendicular to the long side direction; and a metal coating part surrounding at least one of the upper part and the lower part of the core part, and the upper part and the lower part of the core part may be spaced apart in the long side direction.

[0023] In an embodiment, the aligning of the plurality of deformed scatterers may include applying a magnetic field to the quantum dot ink disposed in the opening of the plurality of openings corresponding to the green light controlling portion.

[0024] In an embodiment, the core portion may include TiO 2 、SiO 2 ,BaSO 4 、ZnO、Al 2 O 3 、CaCO 3 or a combination thereof, and the metal coating portion may include Al, Cu, or a combination thereof.

[0025] In an embodiment, the disposing of the quantum dot ink may include ejecting the quantum dot ink by an inkjet printing method.

[0026] In an embodiment, the curing of the quantum dot ink may include irradiating ultraviolet light into the quantum dot ink.

[0027] In an embodiment, the forming of the blue light controlling portion may include: ejecting ink including a plurality of spherical scatterers into an opening corresponding to the blue light controlling portion among the plurality of openings by an inkjet printing method; and curing the ejected ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate embodiments of the inventive concept and together with the description serve to explain the principles of the inventive concept. In the drawings:

[0029] Figure 1 is a perspective view showing a display device according to an embodiment;

[0030] Figure 2 Is the edge of the display device Figure 1 A schematic cross-sectional view of the line II' taken in FIG.

[0031] Figure 3 is a plan view of a display panel according to an embodiment;

[0032] Figure 4 is an enlarged plan view showing a part of a display area in a display device according to an embodiment;

[0033] Figure 5 is a schematic cross-sectional view showing a portion of a display device according to an embodiment;

[0034] Figure 6 is a schematic cross-sectional view showing a portion of a light control layer according to an embodiment;

[0035] Fig. 7A is a perspective view showing a deformed scatterer according to an embodiment;

[0036] Figure 7B is a view showing a portion of a deformed scatterer according to an embodiment;

[0037] Fig. 8A is a view showing the form of light emission from a typical light control portion including a typical scatterer as an example;

[0038] Figure 8B is a view showing a form of light emission from a light control portion according to an embodiment as an example;

[0039] Fig. 9 is a view showing wavelength characteristics of source light according to an embodiment;

[0040] Fig.10 is a schematic cross-sectional view of a light control layer according to an embodiment;

[0041] Fig.11 is a diagram showing optical characteristics according to wavelength in a comparative example and an example according to the embodiment; and

[0042] FIG. 12A to FIG. 12C Each is a view showing a step in a method for manufacturing a display device according to an embodiment. DETAILED DESCRIPTION

[0043] In the following description, for the purpose of illustration, many specific details are set forth in order to provide a thorough understanding of various embodiments or implementations of the present invention. As used herein, "embodiment" and "implementation" are interchangeable words as non-limiting examples of the apparatus or method disclosed herein. However, it is apparent that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. Here, various embodiments do not necessarily have to be exclusive or limit the present disclosure. For example, the specific shape, configuration, and characteristics of an embodiment may be used or implemented in another embodiment.

[0044] Unless otherwise specified, the embodiments shown will be understood to provide features of the present invention. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects of various embodiments (hereinafter, individually or collectively referred to as "elements") can be combined, separated, interchanged and / or rearranged in other ways without departing from the concept of the present invention.

[0045] The use of cross hatching and / or shading in the drawings is generally provided to make the boundaries between adjacent elements clear. Therefore, unless otherwise specified, the presence or absence of cross hatching or shading neither conveys or indicates any preference or requirement for the specific material, material properties, size, ratio, commonality between the elements shown and / or any other characteristics, attributes, properties, etc. of the elements. In addition, in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. When the embodiments can be implemented differently, the specific process sequence can be performed differently from the described sequence. For example, two processes described in succession can be performed substantially simultaneously or in an order opposite to the described sequence. In addition, the same figure mark and / or reference character refer to the same element.

[0046] When an element or layer is referred to as being "on" another element or layer, "connected to" another element or layer, or "coupled to" another element or layer, the element or layer may be directly on, directly connected to, or directly coupled to the other element or layer, or there may be intervening elements or intervening layers. However, when an element or layer is referred to as being "directly on" another element or layer, "directly connected to" another element or layer, or "directly coupled to" another element or layer, there are no intervening elements or intervening layers. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, and / or a fluid connection with or without intervening elements. In addition, the X-axis direction X, the Y-axis direction Y, and the Z-axis direction Z, or the first directional axis DR1, the second directional axis DR2, and the third directional axis DR3 are not limited to the three axes of a rectangular coordinate system (such as the x-axis, the y-axis, and the z-axis), and may be interpreted in a broader sense. For example, the X-axis direction X, the Y-axis direction Y, and the Z-axis direction Z or the first, second, and third direction axes DR1, DR2, and DR3 may be perpendicular to each other, or may represent different directions that are not perpendicular to each other.

[0047] For the purpose of this disclosure, "at least one of A and B" may be interpreted as only A, only B, or any combination of A and B. In addition, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] Although the terms "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element.

[0049] For descriptive purposes, spatially relative terms such as "under," "below," "down," "above," "up," "above," "higher," and "side" (e.g., as in "sidewall") may be used herein and thereby describe the relationship of one element to another element(s) as shown in the accompanying drawings. In addition to the orientations depicted in the accompanying drawings, spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture. For example, if the device in the accompanying drawings is flipped, an element described as "under" or "beneath" other elements or features will subsequently be oriented "over" the other elements or features. Thus, the term "under" can encompass both above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and therefore, the spatially relative descriptors used herein are interpreted accordingly.

[0050] The terms used herein are for the purpose of describing a particular embodiment and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "one (kind / person)" and "said (the)" are also intended to include plural forms. In addition, the terms "include", "comprise", "contain", and / or "have" when used in this specification, illustrate the existence of stated features, integral bodies, steps, operations, elements, components and / or their groups, but do not exclude the existence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or their groups. It is also noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms rather than degree terms, and, therefore, are used to explain the inherent deviations in the measured values, calculated values ​​and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0051] Various embodiments are described herein with reference to cross-sectional views and / or exploded views that are schematic diagrams of embodiments and / or intermediate structures. Therefore, variations in the shapes of the illustrations due to, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, the embodiments disclosed herein should not necessarily be construed as limited to the shapes of the specifically illustrated regions, but will include deviations in shapes due to, for example, manufacturing. In this manner, the regions illustrated in the accompanying drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of regions of the device, and, therefore, are not necessarily intended to be limiting.

[0052] As used herein, the term "Group" refers to a Group in the IUPAC Periodic Table of Elements.

[0053] As used herein, "Group II" may include Group IIA elements and Group IIB elements. For example, the Group II element may be magnesium (Mg) or zinc (Zn), but may not be limited thereto.

[0054] As used herein, "Group III" may include Group IIIA elements and Group IIIB elements. For example, the Group III element may be aluminum (Al), indium (In), or gallium (Ga), but may not be limited thereto.

[0055] As used herein, "Group V" may include Group VA elements and Group VB elements. For example, the Group V element may be phosphorus (P), arsenic (As), or antimony (Sb), but may not be limited thereto.

[0056] As used herein, "Group VI" may include Group VIA elements and Group VIB elements. For example, the Group VI element may be oxygen (O), sulfur (S), selenium (Se), or tellurium (Te), but may not be limited thereto.

[0057] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will also be understood that, unless explicitly defined as such herein, terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formalized sense.

[0058] Hereinafter, a display device according to an embodiment of the inventive concept and a method for manufacturing the display device according to an embodiment will be described with reference to the accompanying drawings.

[0059] Figure 1 is a perspective view showing a display device according to an embodiment. Figure 2 Is the edge of the display device Figure 1 Schematic cross-sectional view taken along line II'. Figure 3 is a plan view of a display panel according to an embodiment.

[0060] The display device DD may be a device activated according to an electrical signal. For example, the display device DD may be a large device such as a television, a monitor, or an outdoor billboard. The display device DD may be a small or medium-sized device such as a personal computer, a laptop computer, a personal digital terminal, a car navigation system, a game console, a smart phone, a tablet computer, and a camera. These devices may be provided only as embodiments, and other electronic devices may be employed as long as they do not depart from the concept of the present invention.

[0061] The display device DD may be rigid or flexible. "Flexible" indicates a property of being able to be bent. For example, the flexible display device DD may include a curved display device, a rollable display device, or a foldable display device.

[0062] Figure 1 The following figures show the first direction axis DR1 to the third direction axis DR3, and the directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 described herein may be relative concepts and thus may be changed to other directions. The directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 may be described as the first direction DR1, the second direction DR2, and the third direction DR3, and the same reference numerals may be used. The first direction axis DR1 and the second direction axis DR2 herein may be perpendicular to each other, and the third direction axis DR3 may be a normal direction relative to a plane defined by the first direction axis DR1 and the second direction axis DR2.

[0063] The thickness direction of the display device DD may be parallel to a third directional axis DR3 which may be a normal direction relative to a plane defined by the first directional axis DR1 and the second directional axis DR2. As described herein, the front surface (or upper surface) and the rear surface (or lower surface) of the components constituting the display device DD may be defined relative to the third directional axis DR3. The front surface (or upper surface) and the rear surface (or lower surface) of each component constituting the display device DD may face away from each other in the third direction DR3, and the normal direction of each of the front surface and the rear surface may be substantially parallel to the third direction DR3. The distance between the front surface and the rear surface defined in the third direction DR3 may correspond to the thickness of the component.

[0064] As used herein, "in a plan view" may be defined as a state when viewed in the third direction DR3. As used herein, "when viewed in a cross section" may be defined as a state when viewed in the first direction DR1 or the second direction DR2. The directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 may be relative concepts and may be changed to other directions accordingly.

[0065] The display device DD may display an image (or video) through a display surface IS. The display surface IS may include a plane defined by a first direction DR1 and a second direction DR2. The display surface IS may include a display area DA and a non-display area NDA. A plurality of pixel components PXU may be disposed in the display area DA, and the pixel components PXU may not be disposed in the non-display area NDA. The non-display area NDA may be defined at an edge of the display surface IS. The non-display area NDA may surround the display area DA. However, embodiments of the present inventive concept may not be limited thereto, and the non-display area NDA may not be provided or may be disposed only on one side of the display area DA.

[0066] The pixel part PXU may define pixel rows and pixel columns. The pixel part PXU may be a minimum repeating unit, and the pixel part PXU may include at least one pixel. The pixel part PXU may include a plurality of pixels providing light of different colors.

[0067] In an embodiment of the inventive concept, a display device DD having a flat display surface (display surface IS) may be shown, but may not be limited thereto. The display device DD may include a curved display surface or a three-dimensional display surface. The three-dimensional display surface may include a plurality of display areas indicating different directions.

[0068] refer to Figure 2 According to the embodiment, the display device DD may include a display panel DP and a light control panel OP disposed on the display panel DP. The display panel DP may include a base layer BS, a circuit layer DP-CL, and a display layer DP-ED, and the base layer BS, the circuit layer DP-CL, and the display layer DP-ED may be sequentially stacked on each other in the direction of the third directional axis DR3. The light control panel OP may be disposed on the display layer DP-ED. In the display device DD of the embodiment, the light control panel OP may be disposed on the display layer DP-ED (for example, directly disposed on the display layer DP-ED).

[0069] Herein, when a component is "directly disposed / directly formed" on another component, it indicates that a third component may not be disposed between the component and the other component. When a component is "directly placed / directly formed" on another component, it indicates that the component is "in contact with" the other component.

[0070] Although not shown, in an embodiment, a filling layer (not shown) may be provided between the display panel DP and the light control panel OP. The display panel DP and the light control panel OP may be provided to be spaced apart with a filling layer (not shown) between the display panel DP and the light control panel OP. The light control panel OP may be manufactured in a separate process and then provided on the display panel DP.

[0071] In an embodiment, the display panel DP may be referred to as a lower panel or a lower display substrate, and the light control panel OP may be referred to as an upper panel or an upper display substrate.

[0072] In the display device DD of the embodiment, the base layer BS may be a supporting substrate on which the circuit layer DP-CL and the display layer DP-ED are provided. The circuit layer DP-CL may include at least one insulating layer and a circuit element. The circuit element may include a signal line and a pixel driving circuit, etc. The circuit layer DP-CL may be formed by a process of forming an insulating layer, a semiconductor layer, and a conductive layer by coating and vapor deposition, etc., and a process of patterning the insulating layer, the semiconductor layer, and the conductive layer by photolithography.

[0073] The display layer DP-ED may include a display element. The display element may include a light emitting element that generates light and provides the light to the light control panel OP. The display panel DP including the display layer DP-ED may provide source light to the light control panel OP disposed on the upper portion.

[0074] The light control panel OP may convert the wavelength of light provided from the display panel DP or transmit a portion of the provided light. The light control panel OP may include a light control portion that converts or transmits the wavelength and a structure designed to improve conversion efficiency of emitted light.

[0075] Figure 3 is a plan view of a display panel according to an embodiment. Figure 3 The planar arrangement relationship of the signal lines GL1 to GLn and DL1 to DLm and the pixels PX11 to PXnm is shown. The signal lines GL1 to GLn and DL1 to DLm may include a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm. Each of n and m may be a positive integer.

[0076] The pixels PX11 to PXnm may be electrically connected to corresponding gate lines among the gate lines GL1 to GLn and corresponding data lines among the data lines DL1 to DLm, respectively. The pixels PX11 to PXnm may each include a pixel driving circuit and a display element. According to the configuration of the pixel driving circuit of the pixels PX11 to PXnm, more different types of signal lines may be provided in the display panel DP.

[0077] Figure 3 The pixels PX11 to PXnm arranged in a matrix form are shown as an example, but the embodiments of the inventive concept may not be limited thereto. The pixels PX11 to PXnm may be arranged in a matrix form. For example, the points at which the pixels PX11 to PXnm may be disposed may correspond to the vertices of the diamond shape. The gate driving circuit GDC may be integrated in the display panel DP by an oxide silicon gate (OSG) driver circuit process or an amorphous silicon gate (ASG) driver circuit process.

[0078] Figure 4 is an enlarged plan view showing a part of a display area in the display device according to the embodiment.

[0079] refer to Figure 4 In an embodiment, a plurality of pixel components PXU may be arranged in a first direction DR1 and a second direction DR2, respectively. In an embodiment, the pixel component PXU may include a first pixel, a second pixel, and a third pixel that emit light in different wavelength ranges. Red light, green light, and blue light may be emitted from the first pixel, the second pixel, and the third pixel, respectively. Figure 4, a first pixel region PXA-R, a second pixel region PXA-G, and a third pixel region PXA-B may be shown to represent a first pixel, a second pixel, and a third pixel, respectively. The first pixel region PXA-R may be a region in which light generated from the first pixel may be provided to the outside, the second pixel region PXA-G may be a region in which light generated from the second pixel may be provided to the outside, and the third pixel region PXA-B may be a region in which light generated from the third pixel may be provided to the outside. The first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may not overlap in a plan view and may be separated from each other.

[0080] In an embodiment, the first pixel region PXA-R may be a red light emission region that emits red light, the second pixel region PXA-G may be a green light emission region that emits green light, and the third pixel region PXA-B may be a blue light emission region that emits blue light. However, embodiments of the inventive concept may not be limited thereto, and in an embodiment, the display area DA may further include a pixel region that emits white light in addition to the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B.

[0081] The peripheral area NPXA may be arranged to surround each of the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B. The peripheral area NPXA may be disposed between the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B. The peripheral area NPXA may define a boundary between the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B to prevent color mixing between the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B. A structure for preventing color mixing between the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B may be provided in the peripheral area NPXA, for example, a pixel defining layer PDL ( Figure 5 ) or partition pattern BMP( Figure 5 ).

[0082] Figure 4 1 shows a display device DD (which may include a first pixel region PXA-R, a second pixel region PXA-G, and a third pixel region PXA-B having the same planar shape and different planar areas. Figure 1) is taken as an example, but the embodiments of the inventive concept may not be limited thereto. The first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may all have the same size of area, or at least one type of pixel region may have a different size of area from other types of pixel regions. The areas of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be set according to the color of the emitted light.

[0083] refer to Figure 4 , in a plan view, the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may have a rectangular shape. However, the embodiment may not be limited thereto, and in a plan view, the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may have any other polygonal shape (including a substantially polygonal shape) such as a rhombus or a pentagon. In a plan view, the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may have a rectangular shape (substantially a rectangular shape) with rounded corners.

[0084] Figure 4 It is shown that the second pixel region PXA-G may be disposed in the first row and the first pixel region PXA-R and the third pixel region PXA-B may be disposed in the second row as an example, but embodiments of the inventive concept may not be limited thereto, and the arrangement of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be variously changed. For example, the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be disposed in the same row.

[0085] For example, the pixel areas PXA-R, PXA-G, and PXA-B may be arranged in the form of stripes or may be arranged in the form of Structure or Diamond However, the embodiment may not be limited thereto, and the order and arrangement of the pixel regions PXA-R, PXA-G, and PXA-B may be arranged according to the display device DD ( Figure 1 )There are various combinations of display quality characteristics required.

[0086] Figure 5 is a schematic cross-sectional view showing a part of a display device according to an embodiment. Figure 5 Can be shown with Figure 4 A schematic cross-sectional view of a portion corresponding to line II-II'.

[0087] refer to Figure 5In an embodiment, the display panel DP may include a base layer BS, a circuit layer DP-CL disposed on the base layer, and a display layer DP-ED disposed on the circuit layer DP-CL. The display layer DP-ED may include a pixel defining layer PDL, a light emitting element ED, and an encapsulation layer TFE. The encapsulation layer TFE may cover an upper portion of the light emitting element ED.

[0088] In the display device DD according to the embodiment, the display panel DP may be a light-emitting display panel. For example, the display panel DP may be an organic electroluminescent display panel. In the case where the display panel DP may be an organic electroluminescent display panel, the display layer DP-ED may include an organic electroluminescent element as a light-emitting element ED. However, the embodiments of the present inventive concept may not be limited thereto. For example, the display layer DP-ED may include a quantum dot light-emitting element as a light-emitting element ED. The display layer DP-ED may include a micro light-emitting diode (LED) element and / or a nano LED element as a light-emitting element ED.

[0089] The display panel DP may provide source light. The light emitting element ED may generate source light. The source light generated and emitted from the light emitting element ED may be provided to the light control panel OP, and at least a portion of the source light may be converted into light having a wavelength different from the wavelength of the source light in the light control layer CCL of the light control panel OP, or at least a portion of the source light may be transmitted without wavelength conversion.

[0090] In the display panel DP, the base layer BS may be a member that provides a base surface on which the circuit layer DP-CL and the display layer DP-ED may be disposed. The base layer BS may be a glass substrate, a metal substrate, a polymer substrate, etc. However, embodiments of the inventive concept may not be limited thereto, and the base layer BS may be an inorganic layer, a functional layer, or a composite material layer.

[0091] The base layer BS may have a multilayer 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. Specifically, the polymer resin layer may include a polyimide resin. The polymer resin layer may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a siloxane resin, a polyamide resin and a perylene resin. As used herein, an "α-type" resin may be considered to be a resin including a functional group of "α".

[0092] 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, and a conductive pattern (e.g., a circuit element including a signal line and a pixel driving circuit), etc. The insulating layer, the semiconductor layer, and the conductive layer may be formed on the base layer BS by 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 and the conductive pattern included in the circuit layer DP-CL may be formed. In an embodiment, the circuit layer DP-CL may include a transistor, a buffer layer, and a plurality of insulating layers. In an embodiment, the circuit layer DP-CL may include a plurality of transistors (not shown). The plurality of transistors (not shown) may each include a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL may include a switching transistor and a driving transistor for driving the light emitting element ED of the display layer DP-ED.

[0093] The display layer DP-ED may include a light emitting element ED as a display element. The light emitting element ED may generate source light. In an embodiment, the source light may include blue light and green light. In an embodiment, the source light may be white light that may include blue light, green light, and red light.

[0094] In an embodiment, the display layer DP-ED may include a light emitting element ED, the light emitting element ED including a first electrode EL1, a second electrode EL2 facing the first electrode EL1, and a light emitting portion ELS disposed between the first electrode EL1 and the second electrode EL2. In an embodiment, the light emitting portion ELS may include an organic light emitting material, and the light emitting element ED may be an organic electroluminescent element. The light emitting element ED may further include a hole transport region HTR and an electron transport region ETR. Although not shown, the light emitting element ED may further include a cover layer (not shown) disposed on an upper portion of the second electrode EL2.

[0095] The display layer DP-ED may include a pixel defining layer PDL. The pixel defining layer PDL may be disposed on the circuit layer DP-CL and may cover a portion of the first electrode EL1. A light emitting opening OH may be defined in the pixel defining layer PDL. The light emitting opening OH of the pixel defining layer PDL may expose at least a portion of the first electrode EL1. In an embodiment, the light emitting areas EA1, EA2, and EA3 may be defined corresponding to a partial area of ​​the first electrode EL1 exposed by the light emitting opening OH.

[0096] The pixel defining layer PDL may be formed of a polymer resin. For example, the pixel defining layer PDL may include a polyacrylate resin, a polyimide resin, or a combination thereof. The pixel defining layer PDL may be formed by including an inorganic material in addition to the polymer resin. The pixel defining layer PDL may include a light absorbing material, for example, a black pigment or a black dye. The pixel defining layer PDL formed by including a black pigment or a black dye may realize a black pixel defining layer. In the case of forming the pixel defining layer PDL, carbon black may be used as the black pigment or the black dye, but the embodiments of the inventive concept may not be limited thereto.

[0097] The pixel defining layer PDL may be formed of an inorganic material. For example, the pixel defining layer PDL may be formed of silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) etc. or a combination thereof.

[0098] The display panel DP may include a first light emitting area EA1, a second light emitting area EA2, and a third light emitting area EA3. The first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3 may be areas divided by a pixel defining layer PDL. The first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3 may correspond to the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B, respectively. As described herein, the term "corresponding" indicates that two components overlap when viewed in the thickness direction (third direction DR3) of the display panel DP (or in a plan view), and this may not be limited to the two components having the same area.

[0099] The light emitting regions EA1, EA2, and EA3 may overlap the pixel regions PXA-R, PXA-G, and PXA-B, respectively. In a plan view, the pixel regions PXA-R, PXA-G, and PXA-B separated by the partition pattern BMP may have a larger area than the light emitting regions EA1, EA2, and EA3 separated by the pixel defining layer PDL.

[0100] In the light emitting element ED, the first electrode EL1 may be disposed on the circuit layer DP-CL. The first electrode EL1 may be exposed by the light emitting opening OH of the pixel defining layer PDL. The first electrode EL1 may be an anode or a cathode. The first electrode EL1 may be a pixel electrode. The first electrode EL1 may be a transmissive electrode, a semi-transmissive and semi-reflective electrode, or a reflective electrode.

[0101] The second electrode EL2 may be disposed on the first electrode EL1. The second electrode EL2 may be a cathode or an anode. In an embodiment, when the first electrode EL1 may be an anode, the second electrode EL2 may be a cathode, and when the first electrode EL1 may be a cathode, the second electrode EL2 may be an anode. The second electrode EL2 may be a common electrode. However, embodiments of the inventive concept may not be limited thereto. The second electrode EL2 may be a transmissive electrode, a semi-transmissive and semi-reflective electrode, or a reflective electrode.

[0102] In an embodiment, the light emitting portion ELS may be provided as a single emission layer or as a light emitting stacked structure in which a plurality of light emitting components may be stacked on each other. In the case where the light emitting portion ELS may be a light emitting stacked structure in which a plurality of light emitting components may be stacked on each other, the light emitting portion ELS may include two or more light emitting stacked structures, which may be different from each other and stacked on each other in a third direction DR3 which may be a thickness direction. The two or more light emitting stacked structures may each include at least one emission layer.

[0103] For example, in an embodiment, the light emitting portion ELS may include at least one blue light emitting unit emitting blue light and at least one green light emitting unit emitting green light. The light emitting portion ELS may include a charge generation layer disposed between the light emitting components. The embodiments of the inventive concept may not be limited thereto, and the light emitting portion ELS may include a blue light emitting unit emitting blue light, a green light emitting unit emitting green light, and a red light emitting unit emitting red light.

[0104] The emission layer included in the light emitting portion ELS may have a single layer formed of a single material, a single layer formed of multiple materials different from each other, or a multilayer structure having multiple layers formed of multiple materials different from each other. The emission layer may include a fluorescent material or a phosphorescent material. In the light emitting element ED according to the embodiment, the light emitting portion ELS may include an organic light emitting material, an organic metal complex, or a quantum dot as a light emitting material.

[0105] The light emitting portion ELS may be commonly disposed in the first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3, and the non-light emitting area. In this article, the non-light emitting area may be a portion overlapping the pixel defining layer PDL. However, the embodiments of the present invention may not be limited thereto, and in an embodiment, the light emitting portion ELS may be disposed in the light emitting opening OH. The light emitting portion ELS may be individually disposed to correspond to each of the light emitting areas EA1, EA2, and EA3 that may be separated by the pixel defining layer PDL.

[0106] In the light emitting element ED, the hole transport region HTR may be disposed on the first electrode EL1. The hole transport region HTR may be commonly disposed in the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3, and the non-light emitting region. In an embodiment, the hole transport region HTR may be a common layer and may be disposed with Figure 4 The plurality of pixel parts PXU of the display area DA shown in the figure overlap. However, the embodiments of the inventive concept may not be limited thereto, and the hole transport region HTR may be separately provided to correspond to each of the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3. The hole transport region HTR may include at least one of a hole transport layer, a hole injection layer, and an electron blocking layer.

[0107] The electron transport region ETR may be disposed on the light emitting portion ELS. The electron transport region ETR may include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer. The electron transport region ETR may be commonly disposed in the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3, and the non-light emitting region. However, embodiments of the inventive concept may not be limited thereto, and the electron transport region ETR may be individually disposed to correspond to each of the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3.

[0108] The encapsulation layer TFE may be disposed on the second electrode EL2. For example, in the case where the light emitting element ED includes a cover layer (not shown), the encapsulation layer TFE may be disposed on the cover layer (not shown). The encapsulation layer TFE may cover the light emitting element ED.

[0109] The encapsulation layer TFE may be a thin film encapsulation layer. The encapsulation layer TFE may be a single layer or a stacked layer of multiple layers. The encapsulation layer TFE may include at least one insulating layer. The encapsulation layer TFE according to the embodiment may include at least one inorganic film (hereinafter, encapsulation inorganic film). The encapsulation layer TFE according to the embodiment may include at least one organic film (hereinafter, encapsulation organic film) and at least one encapsulation inorganic film.

[0110] The encapsulation inorganic film protects the light emitting element ED from moisture / oxygen, and the encapsulation organic film protects the light emitting element ED from foreign matter such as dust particles. The encapsulation inorganic film may include silicon nitride, silicon oxynitride, silicon oxide, titanium oxide, aluminum oxide, etc., or a combination thereof, but may not be particularly limited thereto. The encapsulation organic film may include an acrylic compound, an epoxy compound, etc., or a combination thereof. The encapsulation organic film may include a photopolymerizable organic material, and may not be particularly limited thereto.

[0111] The light control panel OP may be disposed on the display panel DP. Figure 5 In the display device DD of the embodiment shown in , the light control panel OP may be disposed (e.g., directly disposed) on the display panel DP. However, embodiments of the inventive concept may not be limited thereto, and the display device DD may include a filling layer (not shown) disposed between the display panel DP, which may be a lower panel, and the light control panel OP, which may be an upper panel, as described above.

[0112] In an embodiment, the light control panel OP may include a light control layer CCL. Figure 5 In the embodiment shown in , the light control layer CCL may be disposed on the encapsulation layer TFE. In an embodiment, the light control panel OP may further include a buffer layer FML, a low refractive layer LR, a color filter layer CFL, and a base substrate BL in addition to the light control layer CCL.

[0113] In an embodiment, the light control layer CCL may include quantum dots. The light control layer CCL may include a plurality of light control parts CCP-R, CCP-G, and CCP-B. At least one of the first light control part CCP-R, the second light control part CCP-G, and the third light control part CCP-B may include quantum dots that convert optical properties of the source light.

[0114] The light control layer CCL may include a segmentation pattern BMP. The segmentation pattern BMP may be configured to distinguish between a plurality of light control parts CCP-R, CCP-G, and CCP-B. The segmentation pattern BMP may include a base resin and an additive. The base resin may be formed of various resin compositions that may be collectively referred to as a binder. The additive may include a coupling agent and / or a photoinitiator. The additive may also include a dispersant.

[0115] The partition pattern BMP may include a black colorant for blocking light. The partition pattern BMP may include a black dye and a black pigment mixed with a base resin. In an embodiment, the black colorant may include carbon black, a metal such as chromium, or an oxide of a metal.

[0116] An opening BW-OH corresponding to the light emitting opening OH may be defined in the partition pattern BMP. In a plan view, the opening BW-OH may overlap with the light emitting opening OH and have a larger area than the light emitting opening OH. The opening BW-OH may have a larger area than the light emitting areas EA1, EA2, and EA3 defined by the light emitting opening OH. The light control parts CCP-R, CCP-G, and CCP-B may be disposed inside the opening BW-OH.

[0117] In an embodiment, the light control layer CCL may include a first light control portion CCP-R corresponding to the first pixel area PXA-R, a second light control portion CCP-G corresponding to the second pixel area PXA-G, and a third light control portion CCP-B corresponding to the third pixel area PXA-B. The first light control portion CCP-R may be a red light control portion that emits red light, and the second light control portion CCP-G may be a green light control portion that emits green light. The third light control portion CCP-B may be a blue light control portion that emits blue light. For example, the third light control portion CCP-B may be a transmissive light control portion that transmits and emits source light.

[0118] The first light control part CCP-R performs wavelength conversion on the source light provided from the display layer DP-ED to emit red light. A portion of the source light can be emitted by passing through the first light control part CCP-R without wavelength conversion. The second light control part CCP-G performs wavelength conversion on the source light provided from the display layer DP-ED to emit green light. A portion of the source light can be emitted by passing through the second light control part CCP-G without wavelength conversion. In an embodiment, the first light control part CCP-R and the second light control part CCP-G may include quantum dots that perform wavelength conversion on at least a portion of the source light.

[0119] In an embodiment, the third light control part CCP-B may not include quantum dots. However, embodiments of the inventive concept may not be limited thereto, and the third light control part CCP-B may also include quantum dots, and the third light control part CCP-B may emit light in a different wavelength range from the first light control part CCP-R and the second light control part CCP-G.

[0120] exist Figure 5 In the light control panel OP according to the embodiment shown in , the base substrate BL may be a member that provides a reference surface on which the color filter layer CFL, the low refractive layer LR, and the light control layer CCL may be disposed. The base substrate BL may be a glass substrate, a metal substrate, a plastic substrate, and the like. However, the embodiments of the present inventive concept may not be limited thereto, and the base substrate BL may be an inorganic layer, an organic layer, or a composite material layer. Unlike the illustrated case, the base substrate BL may be omitted in the embodiment.

[0121] Although not shown, an anti-reflection layer may be provided on the base substrate BL. The anti-reflection layer may be a layer that reduces the reflectivity of external light incident from the outside. The anti-reflection layer may be a layer that selectively transmits light emitted from the display device DD. In an embodiment, the anti-reflection layer may be a single layer including a dye and / or a pigment dispersed in a base resin. The anti-reflection layer may be provided as a single continuous layer that may completely overlap the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B.

[0122] The anti-reflection layer may not include a polarizing layer. Therefore, light that passes through the anti-reflection layer and may be incident on one side of the display layer DP-ED may be non-polarized light. The display layer DP-ED may receive non-polarized light from an upper portion of the anti-reflection layer.

[0123] In an embodiment, the light control layer CCL may include barrier layers CAP-B and CAP-T. The barrier layers CAP-B and CAP-T may be used to prevent the penetration of moisture and / or oxygen (hereinafter, referred to as "moisture / oxygen") and improve the optical properties of the light control panel OP by adjusting the refractive index. The barrier layers CAP-B and CAP-T may be disposed in the upper or lower portion of the light control layer CCL. The barrier layers CAP-B and CAP-T may be disposed on the upper or lower surface of the light control parts CCP-R, CCP-G, and CCP-B to prevent the light control parts CCP-R, CCP-G, and CCP-B from being exposed to moisture / oxygen, and in particular, the quantum dots included in the light control parts CCP-R, CCP-G, and CCP-B may be prevented from being exposed to moisture / oxygen. The barrier layers CAP-B and CAP-T may also protect the light control parts CCP-R, CCP-G, and CCP-B from external impact.

[0124] In an embodiment, the first barrier layer CAP-T may be disposed to be spaced apart from the display layer DP-ED and between the light control parts CCP-R, CCP-G and CCP-B. The first barrier layer CAP-T may be disposed on the upper surface of the light control parts CCP-R, CCP-G and CCP-B. In an embodiment, the light control layer CCL may further include a second barrier layer CAP-B disposed between the light control parts CCP-R, CCP-G and CCP-B and the display layer DP-ED. In an embodiment, the first barrier layer CAP-T may cover the upper surface of the light control parts CCP-R, CCP-G and CCP-B adjacent to the low refractive layer LR, and the second barrier layer CAP-B may cover the lower surface of the light control parts CCP-R, CCP-G and CCP-B adjacent to the display layer DP-ED. As used herein, the "upper surface" may be a surface placed on the upper portion relative to the third direction DR3, and the "lower surface" may be a surface placed on the lower portion relative to the third direction DR3.

[0125] The first barrier layer CAP-T and the second barrier layer CAP-B may cover the light-controlling portions CCP-R, CCP-G, and CCP-B and one side of the partition pattern BMP.

[0126] The first barrier layer CAP-T may cover the partition pattern BMP and surfaces of the light-controlling parts CCP-R, CCP-G, and CCP-B that may be adjacent to the low-refractive layer LR. The first barrier layer CAP-T may be disposed to follow a step between the partition pattern BMP and the light-controlling parts CCP-R, CCP-G, and CCP-B.

[0127] The first barrier layer CAP-T and the second barrier layer CAP-B may include an inorganic material. In an embodiment, the first barrier layer CAP-T may include silicon oxynitride (SiO x N y ). The first barrier layer CAP-T and the second barrier layer CAP-B may include silicon oxynitride. However, embodiments of the inventive concept may not be limited thereto, and the first barrier layer CAP-T may include silicon oxynitride, and the second barrier layer CAP-B may include silicon oxide (SiO x ).

[0128] The light control panel OP may further include a color filter layer CFL disposed on the light control layer CCL. The color filter layer CFL may include at least one of color filters CF1, CF2, and CF3. The color filter transmits light having a specific wavelength range and blocks light having a wavelength outside the specific wavelength range. In an embodiment, the first color filter CF1 may be a red filter that transmits red light, the second color filter CF2 may be a green filter that transmits green light, and the third color filter CF3 may be a blue filter that transmits blue light.

[0129] The color filters CF1, CF2 and CF3 each include a polymer photosensitive resin and a colorant. The colorant may include a pigment, a dye, or a combination thereof. The first color filter CF1 may include a red pigment or a red dye, the second color filter CF2 may include a green pigment or a green dye, and the third color filter CF3 may include a blue pigment or a blue dye. In an embodiment, the third color filter CF3 may not include a pigment or a dye.

[0130] The first color filter CF1, the second color filter CF2, and the third color filter CF3 may be disposed to correspond to the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B, respectively. The first color filter CF1, the second color filter CF2, and the third color filter CF3 may be disposed to overlap the first light control part CCP-R, the second light control part CCP-G, and the third light control part CCP-B, respectively.

[0131] refer to Figure 5 , corresponding to the peripheral area NPXA, the color filters CF1, CF2, and CF3 that transmit different light may be arranged to overlap each other. Corresponding to the peripheral area NPXA, the color filters CF1, CF2, and CF3 may be arranged to overlap each other in a third direction DR3, which may be a thickness direction, to distinguish the boundaries between adjacent pixel areas PXA-R, PXA-G, and PXA-B. Unlike the illustrated case, the color filter layer CFL may include a light blocking portion (not shown) for distinguishing the boundaries between adjacent color filters CF1, CF2, and CF3. The light blocking portion (not shown) may be formed of a blue filter or may include an organic light blocking material or an inorganic light blocking material that may contain a black pigment or a black dye.

[0132] refer to Figure 5, the light control panel OP may further include a low refractive layer LR. The low refractive layer LR may be disposed between the light control layer CCL and the color filters CF1, CF2, and CF3. The low refractive layer LR may be used as an optical functional layer, which may be disposed between the light control parts CCP-R, CCP-G, and CCP-B and the color filters CF1, CF2, and CF3, respectively, to improve the light extraction efficiency of the light emitted from the light control layer CCL or prevent reflected light from being incident on the light control layer CCL. The low refractive layer LR may have a smaller refractive index than a layer adjacent to the low refractive layer LR.

[0133] The low refractive layer LR may include at least one inorganic layer. For example, the low refractive layer LR may include a silicon nitride layer, an aluminum nitride layer, a zirconium nitride layer, a titanium nitride layer, a hafnium nitride layer, a tantalum nitride layer, a silicon oxide layer, an aluminum oxide layer, a titanium oxide layer, a tin oxide layer, a cerium oxide layer, a silicon oxynitride layer, a thin metal film layer, or a combination thereof, in which transmittance, etc., may be ensured. However, the embodiments of the present invention may not be limited thereto, and the low refractive layer LR may include an organic layer. For example, the low refractive layer LR may have a structure in which a plurality of hollow particles may be dispersed in an organic polymer resin. The low refractive layer LR may be formed by a single layer or a plurality of layers.

[0134] In an embodiment, the light control panel OP may further include a buffer layer FML. In an embodiment, the buffer layer FML may fill a space between the light control layer CCL and the color filter layer CFL.

[0135] The buffer layer FML may be used as a buffer between the light control layer CCL and the color filter layer CFL. In an embodiment, the buffer layer FML may have a shock absorbing function, etc., and may increase the strength of the display device DD. The buffer layer FML may be used as a protective layer to protect the light control layer CCL.

[0136] The buffer layer FML may be formed of a filler resin including a polymer resin. For example, the buffer layer FML may be formed of a filler layer resin including an acrylate resin, an epoxy resin, or a combination thereof. Unlike the case described above, the buffer layer FML may be an inorganic material layer including at least one inorganic material among silicon nitride, silicon oxide, and silicon oxynitride. The buffer layer FML may be formed of a single layer or a plurality of layers. In an embodiment, the buffer layer FML may not be provided, and the color filter layer CFL may be disposed (e.g., directly disposed) on the light control layer CCL.

[0137] Figure 6is a schematic cross-sectional view showing a portion of a light-controlling layer according to an embodiment. The light-controlling layer CCL of the embodiment may include first, second, and third light-controlling parts CCP-R, CCP-G, and CCP-B that may be separated by a partition pattern BMP.

[0138] and a second pixel region PXA-G (which may be a green pixel region) Figure 5 ) The corresponding second light control part CCP-G may include the first quantum dot QD-G and the deformed scatterer (modified scatterer) MSP. The second light control part CCP-G may include a base resin part BR, and the first quantum dot QD-G and the deformed scatterer MSP may be dispersed and arranged in the base resin part BR.

[0139] The first quantum dot QD-G can be converted from the display layer DP-ED ( Figure 5 ) provides an optical property of at least a portion of the source light provided. For example, the first quantum dot QD-G can convert light in the blue wavelength range in the source light into green light. The first quantum dot QD-G that converts the wavelength of the provided light to emit green light can be referred to as a green quantum dot.

[0140] The second light-controlling part CCP-G may further include a plurality of deformed scatterers MSP. The plurality of deformed scatterers MSP may each have a rod-like shape. The plurality of deformed scatterers MSP may each be aligned in parallel in a third direction DR3, which may be a thickness direction of the second light-controlling part CCP-G, to be included. Figure 5 ), each of the plurality of deformed scatterers MSP may have a rectangular shape in which the length of the long side may be longer than the length of the short side. Figure 5 ) may be a plane parallel to the third direction DR3 which may be the thickness direction of the light control layer CCL. Figure 5 ) can be a cross section of the upper surface of the first direction axis DR1 ( Figure 1 ) and the third direction axis DR3 or the plane defined by the second direction axis DR2 ( Figure 1 ) and the plane defined by the third directional axis DR3.

[0141] Fig. 7A and Figure 7B Each is a schematic cross-sectional view showing a deformed scatterer according to an embodiment as an example. Fig. 7A is a perspective view showing a deformed scatterer according to an embodiment, and Figure 7B is a view showing a portion of a deformed scatterer according to an embodiment, specifically, Figure 7B Is magnification Fig. 7AView of area AA.

[0142] In an embodiment, the deformed scatterer MSP may include a core portion CRP and a metal coating portion ML. The core portion CRP of the deformed scatterer MSP may have a rod-like shape. The metal coating portion ML may cover one end of the core portion CRP. The metal coating portion ML may surround an upper portion or a lower portion of the core portion CRP. The metal coating portion ML may be provided to cover one side of the upper surface SP-UP or the lower surface SP-BP of the core portion CRP and a side surface extending from the covered surface. Fig. 7A and Figure 7B , the metal coating portion ML is shown as being disposed around the lower surface SP-BP which may be one end of the core portion CRP, but embodiments of the inventive concept may not be limited thereto, and the metal coating portion ML may be disposed around the upper surface SP-UP instead of the lower surface SP-BP.

[0143] The metal coating portion ML may be provided to surround one end of the core portion CRP, and the metal coating portion ML may not be provided on the other end and the core portion CRP may be exposed. The length of the core portion CRP surrounded by the metal coating portion ML in the Z-axis direction Z may be the length H of the entire core portion CRP in the Z-axis direction Z. SP The metal coating portion ML may be provided inclined to one side of the core portion CRP constituting the deformed scatterer MSP, and therefore, in the method for manufacturing a display device of an embodiment to be described later, the deformed scatterer MSP may be easily arranged. The deformed scatterer MSP may be arranged in a desired alignment direction using a magnetic field or the like depending on the presence or absence of a metal material by distinguishing between a portion coated with a metal material and a portion not coated.

[0144] refer to Fig. 7A and Figure 7B In the embodiment, in the deformed scatterer MSP, the length H in the Z-axis direction Z which may be the long side direction SP It can be the length D in the X-axis direction X which can be the short side direction. SP The length H of the deformed scatterer MSP in the long side direction is 1.5 times or more. SP It can correspond to the length H of the core part CRP in the long side direction SP , and the length D of the deformed scatterer MSP in the short side direction SP It can correspond to the length D of the core part CRP in the short side direction SP .

[0145] For example, the length H of the core portion CRP in the Z-axis direction Z is SP It can be the length D in the X-axis direction X SPSpecifically, the length H of the core portion CRP in the Z-axis direction Z is about 1.5 to about 10 times. SP The length D in the X-axis direction X SP is in the range of about 2 times to about 10 times of .

[0146] Fig. 7A The X-axis direction X, the Y-axis direction Y, and the Z-axis direction Z shown in the subsequent figures may be relative directions, and the direction along which the X-axis direction X extends and the direction along which the Y-axis direction Y extends may be perpendicular to each other, and the direction along which the Z-axis direction Z extends may be the normal direction of the plane defined by the X-axis direction X and the Y-axis direction Y. In this document, the Z-axis direction Z may be described as a direction parallel to the third direction DR3, but embodiments of the inventive concept may not be limited thereto. The Z-axis direction Z may be the same as or opposite to the direction along which the third direction DR3 extends.

[0147] The deformed scatterer MSP may have a cylindrical shape. For example, the deformed scatterer MSP may have a length D in the X-axis direction X. SP The circular cross section has a diameter corresponding to that of the Z axis and has a length H in the Z axis direction Z. SP The deformed scatterer MSP may have a cylindrical shape with a corresponding height. However, the embodiments of the present inventive concept may not be limited thereto, and the deformed scatterer MSP may have an elliptical cylinder shape having an elliptical cross section parallel to a plane defined by the X-axis direction X and the Y-axis direction Y. Different from the case described above, in a cross section parallel to a plane defined by the X-axis direction X and the Y-axis direction Y, the deformed scatterer MSP may have a length H in the Z-axis direction Z which may be the long side direction. SP It can be the length D in the X-axis direction X which can be the short side direction. SP In the case of three-dimensional shapes of 1.5 times or more, the deformed scatterer MSP can be used without restriction.

[0148] In an embodiment, the deformed scatterer MSP has a length D in the short side direction which may be SP 1.5 times or more of the length H in the long side direction SP , and can therefore have anisotropy in a three-dimensional shape. Therefore, in the case where the deformed scatterer MSP is included in the second light control portion CCP-G ( Figure 6 ) in the case of, the light emission path can be adjusted by the deformed scatterer MSP. The light incident on the second light control part CCP-G ( Figure 6 ) on the path of the light emitted after the deformation scatterer MSP can guide the light on the second light control part CCP-G ( Figure 6) in the third direction DR3 ( Figure 6 ) and can thus increase the second light control portion CCP-G ( Figure 6 ) in front surface light extraction.

[0149] In an embodiment, the length H of the deformed scatterer MSP in the Z-axis direction Z, which may be the long side direction, is SP It may be shorter than the length D in the X-axis direction X which may be the short side direction. SP In the case of 1.5 times of the above, the deformed scatterer MSP may not have stereo anisotropy, and the direction of light scattered by the deformed scatterer MSP does not have a main direction, and therefore, the light path may not be adjusted by the deformed scatterer MSP.

[0150] In each of the plurality of deformed scatterers MSP, the length H in the long side direction is SP The length D in the short side direction may be in the range of about 50 nm to about 500 nm. SP The deformed scatterer MSP may be provided to have a length H in the long side direction within the range of about 20 nm to about 200 nm. SP and the length D in the short side direction SP Numerical range: Length H in the long side direction SP It can be the length D in the short side direction SP The range is about 1.5 times or more.

[0151] For example, in the embodiment, the length H in the long side direction is SP It may be about 180 nm or more, and the length D in the short side direction SP It may be about 100 nm or shorter. However, embodiments of the inventive concept may not be limited thereto.

[0152] The core part CRP of the deformed scatterer MSP may include TiO 2 、SiO 2 ,BaSO 4 、ZnO、Al 2 O 3 、CaCO 3 or a combination thereof. The metal coating portion ML of the deformed scatterer MSP may include Al, Cu, or a combination thereof. For example, in an embodiment, the core portion CRP of the deformed scatterer MSP may be a rod-shaped TiO 2 particles, and the metal coating portion ML may be an Al coating. However, embodiments of the inventive concept may not be limited thereto, and the materials of the core portion CRP and the metal coating portion ML described above may be combined.

[0153] Return to reference Figure 6 , the light control layer CCL may include a first pixel area PXA-R ( Figure 5 ) corresponding to the first light control part CCP-R. The first light control part CCP-R may include a second quantum dot QD-R. The first light control part CCP-R may include a base resin part BR, and the second quantum dot QD-R may be dispersed and disposed in the base resin part BR. The second quantum dot QD-R may convert from the display layer DP-ED ( Figure 5 ) The optical properties of at least a portion of the source light provided by the second quantum dot QD-R may be different from the first quantum dot QD-G. For example, the second quantum dot QD-R may convert light in the blue wavelength range of the source light into red light. The second quantum dot QD-R that can convert the wavelength of the provided light to emit red light may be referred to as a red quantum dot. In an embodiment, a portion of the second quantum dot QD-R may convert light in the green wavelength range of the source light into red light.

[0154] The light control layer CCL may include a third pixel region PXA-B ( Figure 5 ) corresponding to the third light control part CCP-B. The third light control part CCP-B can be a transmission and emission from the display layer DP-ED ( Figure 5 ) provided by the source light. The third light-controlling part CCP-B may include a base resin part BR, and may further include a scatterer SP dispersed in the base resin part BR. The third light-controlling part CCP-B may not include quantum dots. However, embodiments of the inventive concept may not be limited thereto, and may further include a light source light sourced from the display layer DP-ED ( Figure 5 ) converts a portion of the source light provided by the quantum dots into wavelength to emit blue light.

[0155] The scatterer SP included in the third light-controlling part CCP-B may have a spherical shape. The scatterer SP having a spherical shape may uniformly scatter light incident on the third light-controlling part CCP-B so that the light may be transmitted and emitted. The scatterer SP may be an inorganic particle. For example, the scatterer SP may include TiO 2 、ZnO、Al 2 O 3 、SiO 2 and hollow silica. The scatterer SP may include TiO 2 、ZnO、Al 2 O 3 、SiO 2 and hollow silica, or may be selected from TiO 2 、ZnO、Al 2 O 3 、SiO2 and a mixture of two or more materials in hollow silica.

[0156] In the first light control part CCP-R, the second light control part CCP-G and the third light control part CCP-B, the matrix resin part BR can be a medium in which quantum dots QD-R and QD-G, deformed scatterers MSP or scatterers SP can be dispersed, and can be formed by various resin compositions that can be collectively referred to as binders. For example, the matrix resin part BR can be an acrylate resin part, a urethane resin part, a silicone resin part, an epoxy resin part or a combination thereof. The matrix resin parts BR included in the first light control part CCP-R, the second light control part CCP-G and the third light control part CCP-B can all be the same, or the matrix resin part of at least one light control part can be different from the matrix resin part of other light control parts.

[0157] The quantum dots included in the light-controlling layer CCL of the embodiment may include crystals of semiconductor compounds. The description of the quantum dots to be described later may also be applied to the first quantum dot QD-G and the second quantum dot QD-R.

[0158] Quantum dots can emit light of various emission wavelengths depending on the size of the crystal. Quantum dots can emit light of various emission wavelengths by adjusting the element ratio in the quantum dot compound.

[0159] Each quantum dot may have a diameter in a range of about 1 nm to about 10 nm.The quantum dot may be synthesized by a wet chemical process, a metal organic chemical vapor deposition process, a molecular beam epitaxy process, or processes similar thereto.

[0160] Among the quantum dot manufacturing processes, a wet chemical process may be a method of mixing an organic solvent and a precursor material and growing quantum dot particle crystals. In the case of quantum dot particle crystal growth, the organic solvent naturally acts as a dispersant coordinated to the surface of the quantum dot crystal, and the growth of the particle crystal may be controlled. Therefore, a wet chemical process may be easier than a vapor deposition method such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE), and the growth of quantum dot particles may be controlled by a low-cost process.

[0161] The core of the quantum dot may be selected from a group consisting of a II-VI compound, a III-V compound, a III-VI compound, a I-III-VI compound, a IV-VI compound, a Group IV element, a Group IV compound, and combinations thereof.

[0162] The II-VI compound may be selected from the group consisting of binary compounds, ternary compounds and quaternary compounds, wherein the binary compound is selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof, and the ternary compound is selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, The group consisting of CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof, and the quaternary compound is selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and mixtures thereof. The II-VI semiconductor compounds may also include Group I metals and / or Group IV elements. The I-II-VI compounds may be selected from CuZnS and the like, and the II-IV-VI compounds may be selected from ZnSnS and the like. The I-II-IV-VI compounds may be selected from quaternary compounds, and the quaternary compounds are selected from Cu 2 ZnSnS 2 , Cu 2 ZnSnS 4 , Cu 2 ZnSnSe 4 、Ag 2 ZnSnS 2 and mixtures thereof.

[0163] The III-VI compounds may include compounds such as In 2 S 3 andIn 2 Se 3 Binary compounds such as InGaS 3 and InGaSe 3 ternary compounds or any combination thereof.

[0164] The I-III-VI group compounds can be selected from ternary compounds or such as AgInGaS 2 and CuInGaS 2 A quaternary compound, wherein the ternary compound is selected from AgInS, AgInS 2 、CuInS、CuInS 2 、AgGaS 2 、CuGaS 2 、CuGaO 2、AgGaO 2 、AgAlO 2 or a mixture thereof.

[0165] The III-V compound may be selected from the group consisting of binary compounds, ternary compounds and quaternary compounds, the binary compound being selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof, the ternary compound being 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, the quaternary compound being selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof. The III-V compound may also include a Group II metal. For example, InZnP or the like may be selected as the III-II-V group compound.

[0166] The IV-VI Group compound can be selected from the group consisting of binary compounds, ternary compounds and quaternary compounds, the binary compound being selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof, the ternary compound being selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof, the quaternary compound being selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof.

[0167] Examples of II-IV-V semiconductor compounds may be selected from ZnSnP, ZnSnP 2 、ZnSnAs 2 、ZnGeP 2 、ZnGeAs 2 、CdSnP 2 and CdGeP 2 and mixtures thereof constitute a group of ternary compounds.

[0168] 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.

[0169] Each element included in a multi-element compound such as a binary compound, a ternary compound, and a quaternary compound may be present in the particle at a uniform concentration or a non-uniform concentration. The formula representing the quantum dot may indicate the type of element included in the compound, and the element ratio in the compound may be different. For example, AgInGaS 2 Can indicate AgIn x Ga 1-x S 2 (x can be a real number between 0 and 1).

[0170] The binary, ternary or quaternary compound may be present in a particle with a uniform concentration distribution, or may be present in the same particle with a partially different concentration distribution. A core / shell structure may exist in which one quantum dot surrounds another quantum dot. A core / shell structure may have a concentration gradient in which the concentration of the element present in the shell decreases toward the core.

[0171] In some embodiments, the quantum dot may have a core / shell structure including a core having nanocrystals and a shell surrounding the core, which may be as described above. The shell of the quantum dot may be used as a protective layer to prevent chemical changes in the core to maintain semiconductor properties and / or a charging layer to impart 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 be a metal oxide or a non-metal oxide, a semiconductor compound, or a combination thereof.

[0172] For example, the metal oxide or non-metal oxide may be 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 , NiO or binary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and CoMn2 O 4 ternary compound, but embodiments of the inventive concept may not be limited thereto.

[0173] For example, the semiconductor compound may be CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but embodiments of the inventive concept may not be limited thereto.

[0174] The quantum dot may have a full width at half maximum (FWHM) of about 45 nm or less (preferably, about 40 nm or less, and more preferably, about 30 nm or less) in the emission wavelength spectrum, and within this range, color purity or color reproducibility may be improved. Light emitted by the quantum dot may be emitted in all directions, and thus a wide viewing angle may be improved.

[0175] The form of quantum dots may not be particularly limited as long as it can be a form commonly used in the art, but more specifically, quantum dots in the form of spherical, pyramidal, multi-armed or cubic nanoparticles, nanotubes, nanowires, nanofibers and nanosheets, etc. can be used.

[0176] Since the size of the quantum dots or the ratio of elements in the quantum dot compound can be adjusted, the energy band gap can be controlled to obtain light of various wavelengths from the layer containing the quantum dots. Therefore, by using quantum dots as described above (using quantum dots of different sizes or quantum dots with different element ratios in the quantum dot compound), a light control portion that emits light of various wavelengths can be obtained.

[0177] In the embodiments, reference Figures 5 to 7B The display device of the described embodiment may include a deformed scatterer, the long side of which may be aligned parallel to the thickness direction of the light control portion in at least one light control portion of the light control layer, so that the display device has an increased amount of light emitted from the display layer through the light control portion, and may therefore exhibit improved brightness characteristics. The source light generated in the display layer of the display device of the embodiment and provided to the light control layer may be a mixture of two colors of light, each of which has one of a blue wavelength and a green wavelength as a maximum center wavelength. For example, the source light generated in the display layer of the display device of the embodiment and provided to the light control layer may be a mixture of three colors of light, each of which has one of a blue wavelength, a green wavelength, and a red wavelength as a maximum center wavelength.

[0178] Fig. 8Ais a view showing the form of light emission from a typical light control portion including a typical scatterer as an example, and Figure 8B : is a view showing the form of light emission from a light control portion according to the embodiment as an example. Fig. 8A and Figure 8B The light control portions CCP-G' and CCP-G shown in FIG. 8 each correspond to a green light control portion, and the quantum dot composition in the light control portions CCP-G' and CCP-G may not be provided.

[0179] Provided to Fig. 8A and Figure 8B The source light SL of the light control parts CCP-G' and CCP-G shown in the figure can be light in an optical spectrum having two peaks with different central wavelengths. For example, the source light SL can include blue light SL-B having a peak in the blue wavelength range and green light SL-G having a peak in the green wavelength range.

[0180] The scatterer SP included in the typical light control part CCP-G' may be in a spherical shape. Among the source light SL incident on the typical light control part CCP-G', the blue light SL-B may be wavelength-converted in the light control part CCP-G' and emitted as the converted green light CL-G. Among the source light SL incident on the typical light control part CCP-G', the green light SL-G may be scattered by the scatterer SP and a portion of the green light SL-G passes through the light control part CCP-G', and may therefore be emitted as transmitted green light TL-G'. Among the incident green light SL-G, some light SCL that may not be emitted in the third direction DR3, which may be the upper direction of the light control part CCP-G', may be scattered internally and disappear, or may be emitted in a direction other than the light extraction direction. Therefore, only a portion of the incident green light SL-G may be emitted as transmitted green light TL-G'. This indicates that the spherical scatterer SP included in the typical light control portion CCP-G' scatters the incident light in all directions, and therefore, the green light SL-G incident in the third direction DR3 may not only be emitted in the third direction DR3, but may also be scattered and emitted toward the side surface or the lower surface. Therefore, the ratio of the transmitted green light TL-G' that is transmitted and emitted to the front surface in the incident green light SL-G may be significantly reduced.

[0181] In contrast, Figure 8B The light control part CCP-G of the embodiment shown in the figure may include the above-mentioned deformed scatterer MSP, and the deformed scatterer MSP may be arranged and included so that the long side of the deformed scatterer MSP may be parallel to the third direction DR3 which may be the thickness direction of the light control part CCP-G.

[0182] Among the source light SL incident on the light control part CCP-G of the embodiment, the blue light SL-B may be wavelength-converted in the light control part CCP-G and emitted as the converted green light CL-G. Among the source light SL incident on the light control part CCP-G of the embodiment, the green light SL-G may have an optical path partially deformed by the deformed scatterer MSP, but the proportion of the transmitted green light TL-G emitted in the front surface direction may be increased compared to the typical light control part CCP-G'.

[0183] Unlike the spherical scatterer SP, the deformed scatterer MSP may have stereo anisotropy in which the length in one direction (for example, the third direction DR3) may be longer than the length in another direction perpendicular to the one direction, and the path of the incident green light SL-G may be adjusted accordingly. In an embodiment, in a case where the direction along which the long side direction of the deformed scatterer MSP having stereo anisotropy is aligned may be parallel to the direction along which the source light SL may be provided, the light scattered by the deformed scatterer MSP may be minimized, and the green light SL-G may be transmitted between the deformed scatterers MSP without interference, and therefore, the proportion of the transmitted green light TL-G emitted from the front surface direction increases.

[0184] Fig. 9 is a view showing wavelength characteristics of source light according to the embodiment. Fig. 9 The display layer DP-ED ( Figure 5 ) provides the spectrum of the source light. Fig. 9 The spectrum of light emission intensity according to wavelength is shown.

[0185] refer to Fig. 9 , the source light may include a peak having a maximum intensity between about 450 nm and about 470 nm and a peak having a maximum intensity between about 520 nm and about 570 nm. Figure 5 ) may include light in a blue wavelength range and light in a green wavelength range. The light in the blue wavelength range may pass through the light control layer or be provided to the quantum dots included in the light control layer to emit wavelength-converted light. The light in the green wavelength range may also pass through the light control layer or be provided to the quantum dots included in the light control layer to emit wavelength-converted light.

[0186] Source light including light in the green wavelength range may be provided to the green light control portion CCP-G ( Figure 5 ) the source light can be controlled by the green light control part CCP-G ( Figure 5 )emission.

[0187] The display device according to the embodiment may include a deformed scatterer aligned in a direction parallel to the main traveling direction of the source light provided from the display layer and provided to the light control layer in the light control part, and the scattering of the light emitted after passing through the light control part can be minimized, and thus, the amount of light emitted to the front surface is increased, thereby also increasing the brightness of the display device. Specifically, in a display device of an embodiment including a display layer that can provide source light that can include both blue light and green light and a light control layer disposed on the display layer, the green light control part may include a deformed scatterer, and thus, the green light transmitted and emitted from the green light control part can be increased. Therefore, the light efficiency of the green pixel area is improved, and the display quality of the display device can also be improved.

[0188] Fig.10 is a schematic cross-sectional view of a light management layer according to an embodiment. Fig.10 The light control layer CCL-a according to the embodiment shown in FIG. 1 may include Figure 5 In the light control panel OP of the display device DD described in the embodiment of the present invention. Figures 1 to 8B The contents of the light control layer CCL according to the embodiment described in the above embodiments can also be applied to Fig.10 The light control layer CCL-a of the embodiment shown in FIG.

[0189] Fig.10 The light control layer CCL-a of the embodiment shown in FIG. Figure 6 The light control layer CCL of the embodiment shown in FIG. 1 is different in that: Fig.10 The light-control layer CCL-a of the embodiment shown in FIG. 4 may include a deformed scatterer MSP in the first light-control portion CCP-Ra.

[0190] The light control layer CCL-a of the embodiment may include a first light control part CCP-Ra including red quantum dots QD-R and a deformed scatterer MSP, a second light control part CCP-G including green quantum dots QD-G and a deformed scatterer MSP, and a third light control part CCP-B including a spherical scatterer SP. The first light control part CCP-Ra, the second light control part CCP-G, and the third light control part CCP-B may each include a base resin part BR.

[0191] In the light-controlling layer CCL-a of the embodiment, the first light-controlling part CCP-Ra and the second light-controlling part CCP-G may include a deformed scatterer MSP, and thus, among incident source light, the amount of light transmitted through the light-controlling parts CCP-Ra and CCP-G and emitted to the front surface may be increased. Fig.10 In the case of the light control layer CCL-a of the embodiment shown in FIG. , the source light may include blue light, green light, and red light. Fig.10In the case of the light control layer CCL-a of the embodiment shown in the figure, from the display device DD ( Figure 5 ) display layer DP-ED( Figure 5 )The spectrum of the source light emitted may include a peak in the blue light wavelength range, a peak in the green light wavelength range, and a peak in the red light wavelength range.

[0192] Fig.11 TABLE 1 and Table 1 show the results of evaluating the characteristics of the light control portions of the comparative example and the example according to the embodiment. Fig.11 The comparison example in Table 1 is for Fig. 8A The typical green light control part shown in FIG. 1 and the example according to the embodiment can be directed to Figure 8B The green light control portion of the embodiment shown in FIG. 1 is a comparative example comprising a spherical TiO 2 The scatterer includes a deformed scatterer including a TiO having a long side length of about 180 nm and a short side length of about 100 nm. 2 The core part and the metal coating part of Al.

[0193] Fig.11 : is a view showing optical characteristics according to wavelength in comparison between a comparative example and an example according to the embodiment. Fig.11 The intensity of light emitted from the light control portion of the comparative example and the example according to the embodiment is shown. Fig.11 The comparative example in FIG. 1 shows the light output characteristics of a typical green light control portion, and Fig.11 The example according to the embodiment in FIG. 1 shows the light output characteristics of the green light control portion of the embodiment.

[0194] Compare Fig.11 From the comparative example and the example according to the embodiment shown in , it can be seen that in the same wavelength range, the example according to the embodiment shows high emission intensity. It can be seen that in the green light emission wavelength in the range of about 520nm to about 570nm, the example according to the embodiment shows better light output characteristics than the comparative example.

[0195] Table 1 below shows the optical property evaluation results of the comparative example and the example according to the embodiment. In Table 1, "EQE" indicates the conversion efficiency of blue light of about 450nm to green light, which can be provided as the light conversion efficiency, and the comparative example is set to (or standardized to) 100% and the example according to the embodiment is shown in relative ratio. The brightness in Table 1 can be provided in Fig. 9The relative ratio of the brightness value measured at the upper part of the light control part in the case of the light source shown in is shown compared with the comparative example. SCI and SCE each represent the reflected light shown in a relative ratio compared with the comparative example. The difference between the above two may be that SCI may indicate that the specular reflected light is included and SCE may indicate that the specular reflected light is not included.

[0196] [Table 1]

[0197]

[0198] Referring to Table 1, in the example according to the embodiment, the light conversion efficiency in the case of providing blue light of about 450nm is partially reduced, but the brightness of the example according to the embodiment is increased compared to the comparative example. It can be seen that even in the case where the light conversion efficiency is partially reduced, the final brightness of the light control part in the example according to the embodiment shows improvement due to the high transmittance in the light control part. It can be seen that the example according to the embodiment shows reduced reflectivity compared to the comparative example. Therefore, it can be seen that the example according to the embodiment has high brightness and low reflectivity compared to the comparative example, and therefore shows excellent optical properties.

[0199] In the following, reference will be made to FIG. 12A to FIG. 12C etc. describe a method for manufacturing a display device of an embodiment.

[0200] The method for manufacturing a display device of an embodiment may include: forming a display panel including a light emitting element; and forming a light control layer, and the formation of the light control layer may include: forming a plurality of segmentation patterns in which a plurality of openings may be defined on a base portion; and forming a blue light control portion, a green light control portion, and a red light control portion in corresponding openings of the plurality of openings. In an embodiment, in the formation of the light control layer, the formation of the green light control portion may include: providing a quantum dot ink including green quantum dots and a deformed scatterer in the opening; aligning the deformed scatterer so that the long side of the provided deformed scatterer is parallel to the thickness direction of the green light control portion; and curing the quantum dot ink after the alignment of the deformed scatterer. The deformed scatterer included in the quantum dot ink includes a core portion and a metal coating portion, the length of the core portion in the long side direction may be 1.5 times or more of the length in the short side direction perpendicular to the long side direction, the metal coating portion surrounds at least one of the upper portion and the lower portion of the core portion, and the upper portion and the lower portion of the core portion may be spaced apart in the long side direction.

[0201] In a deformed scatterer, the core portion may include TiO 2 、SiO 2 ,BaSO 4 、ZnO、Al 2 O3 、CaCO 3 or a combination thereof, and the metal coating portion may include Al, Cu, or a combination thereof.

[0202] Reference Figures 1 to 9 The display device DD ( Figure 5 ) can be manufactured using the method for manufacturing a display device of an embodiment. Figure 5 and FIG. 12A to FIG. 12C A display device manufactured by the method for manufacturing a display device of the embodiment is described.

[0203] FIG. 12A to FIG. 12C Each is a view showing a step in a method for manufacturing a display device according to an embodiment. Figure 5 and FIG. 12A to FIG. 12C In the method for manufacturing a display device of an embodiment, the formation of the display panel DP and the formation of the light control layer CCL may be each performed by a separate process, and the display panel DP and the light control panel OP including the light control layer CCL may be combined to form the display device DD. However, for example, the light control layer CCL may be manufactured after the manufacture of the display panel DP to be provided on the upper portion of the display panel DP.

[0204] The formation of the light control layer CCL may include forming a partition pattern BMP in which a plurality of openings BW-OH may be defined on the base portion BW. The base portion BW may be a portion serving as a substrate surface on which the partition pattern BMP and the light control portions CCP-R, CCP-G, and CCP-B may be provided. Figure 5 In the embodiment shown in , the base portion BW may be the second barrier layer CAP-B. Figure 5 In the embodiment shown in , the base part BW may be a second barrier layer CAP-B disposed on the upper surface of the display panel DP. However, embodiments of the inventive concept may not be limited thereto. In an embodiment, when manufacturing the light control panel OP, in the case where the color filter layer CFL is first formed and then the light control layer CCL is formed, the base part BW may be the color filter layer CFL or other components of the light control panel OP disposed on the upper portions of the light control parts CCP-R, CCP-G, and CCP-B.

[0205] The blue light control portion CCP-B, the green light control portion CCP-G, and the red light control portion CCP-R of the light control layer CCL may be formed sequentially. However, the embodiments of the inventive concept may not be limited thereto, and after performing the provision of ink for forming each light control portion, curing for forming each light control portion may be performed.

[0206] Fig. 12AThe provision of quantum dot ink is shown as an example. In an embodiment, the green light control portion CCP-G ( Figure 5 ) may include providing a quantum dot ink QIK including a green quantum dot QD and a deformed scatterer MSP in the opening BW-OH. The quantum dot ink QIK may include a matrix resin P-BR. The matrix resin P-BR may correspond to a binder material before curing. The matrix resin P-BR may be an acrylic resin, a urethane resin, a silicone resin, an epoxy resin, or a combination thereof.

[0207] The deformed scatterer MSP included in the quantum dot ink QIK may be dispersed in the matrix resin P-BR and provided randomly. The quantum dot ink QIK may be provided through a nozzle NZ of an inkjet printing device. The quantum dot ink QIK may be ejected into the opening BW-OH using an inkjet printing method.

[0208] Fig. 12B 1 is a view showing the alignment of the deformed scatterer. The deformed scatterer MSP can be aligned so that the deformed scatterer MSP is included in the opening BW-OH ( Fig. 12A ) in quantum dot ink QIK( Fig. 12A ) in which the long side of the deformed scatterer MSP is connected to the light control layer CCL ( Figure 5 ) is parallel to the Z-axis direction Z in the thickness direction.

[0209] The deformed scatterer MSP can be arranged to be aligned in a direction in the base resin P-BR. A magnetic field MGL can be provided (or applied) to the provided quantum dot ink QIK so that the deformed scatterer MSP can be aligned. After the provision of the magnetic field, the deformed scatterer MSP can be arranged from a first state P-MF arranged in a random direction to a second state A-MF aligned in a direction. The magnetic field MGL can be provided from a magnetic field generating device MPT provided under the base portion BW. The deformed scatterer MSP can be aligned in a direction along which the magnetic field MGL can be provided. The deformed scatterer MSP can include a metal coating portion ML( Fig. 7A ), and can be aligned so that one end is biased to one side according to the direction in which the magnetic field MGL is provided. Fig. 12B , the magnetic field generating device MPT may be illustrated as being disposed below the base portion BW, but embodiments of the inventive concept may not be limited thereto, and the magnetic field generating device MPT may be disposed above the provided quantum dot ink QIK to provide the magnetic field MGL.

[0210] Fig. 12C is a view showing the curing of quantum dot ink. Fig. 12B As shown in FIG. , the quantum dot ink QIK ( Fig. 12A ). The curing of the quantum dot ink QIK may include providing ultraviolet (UV) light to the quantum dot ink QIK. The quantum dot ink QIK may be cured by the provided ultraviolet (UV) light to form the light control portion CCP-G ( Figure 5 ). In the curing of quantum dot ink QIK, the matrix resin P-BR ( Fig. 12B ) to form a matrix resin portion BR. The quantum dots QD and the deformed scatterers MSP can be fixed and dispersed in the matrix resin portion BR. The deformed scatterers MSP can be induced by a magnetic field MGL ( Fig. 12B ) is fixed in an aligned state and included in the light control part CCP-G.

[0211] The curing of the quantum dot ink QIK may include thermal curing that provides heat instead of ultraviolet light. For example, the curing of the quantum dot ink QIK may include providing additional heat after providing ultraviolet light.

[0212] Although not shown, the blue light control part CCP-B ( Figure 5 ) may include forming a spherical scatterer SP( Figure 6 ) is ejected to the opening BW-OH ( Fig. 12A ) to provide ink and to cure the provided ink.

[0213] Red light control part CCP-R( Figure 5 ) may further include jetting a quantum dot ink QIK containing red quantum dots into the opening BW-OH by an inkjet printing method and curing the provided quantum dot ink QIK. In the case where the red light control portion CCP-R may include a deformed scatterer MSP, the formation of the red light control portion may further include as described in reference Fig. 12B Aligning the deformed scatterer MSP as described.

[0214] The method for manufacturing a display device of an embodiment may include: providing (or setting) a quantum dot ink including a deformed scatterer; aligning the deformed scatterer; and forming a light control layer, including curing the quantum dot ink after (or during) the alignment of the deformed scatterer, and may thus be used to manufacture a display device with improved light extraction efficiency. In the method for manufacturing a display device of an embodiment, in the alignment of the deformed scatterer, the deformed scatterer including a metal coating portion coated on one end may be aligned in parallel in a direction to improve light transmission efficiency in the light control portion, and may thus be used to manufacture a display device with improved brightness.

[0215] The display device of an embodiment may include a light control portion including quantum dots and deformed scatterers, and align the deformed scatterers parallel to a direction along which source light can be provided to increase the transmittance of a portion of the source light, and may thereby exhibit excellent brightness characteristics.

[0216] The display device of the embodiment may include a rod-shaped deformed scatterer arranged in parallel with a direction in which source light may be provided to increase transmittance of the source light in the light control layer, and may thus exhibit improved brightness characteristics.

[0217] The method for manufacturing a display device of an embodiment may include arranging a rod-shaped diffuser in parallel to a direction in which source light may be provided to increase light transmittance in a light control layer, and may thus provide a display device having improved brightness characteristics.

[0218] Although the present disclosure has been described with reference to the embodiments of the inventive concept, it will be understood that the inventive concept should not be limited to these embodiments, but various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure.

[0219] Therefore, the technical scope of the inventive concept may not be intended to be limited to the contents set forth in the detailed description of this specification, but may be intended to be defined by the appended claims.

Claims

1. A display device, wherein: The display device comprises: A display layer for generating source light; and A light control layer is disposed on the display layer to transmit the source light or perform wavelength conversion on the source light, wherein: The light control layer includes a red light control portion for emitting red light, a green light control portion for emitting green light, and a blue light control portion for emitting the source light, The green light control part includes a plurality of first quantum dots and a plurality of deformed scatterers, Each of the plurality of deformed scatterers comprises a core portion and a metal coating portion, In a cross section perpendicular to the display layer, a length of the core portion in a long side direction of the core portion is 1.5 times or more than a length of the core portion in a short side direction of the core portion perpendicular to the long side direction, The metal coating portion surrounds at least one of the upper portion and the lower portion of the core portion, and The upper portion and the lower portion of the core portion are spaced apart in the long side direction.

2. The display device according to claim 1, wherein: The core portion has a rod-like shape, and The metal coating portion covers one surface of the core portion as an upper surface or a lower surface and a side surface of the core portion extending from the one surface.

3. The display device according to claim 1, wherein: The plurality of deformed scatterers are arranged such that the long side direction is perpendicular to an upper surface of the display layer.

4. The display device according to claim 1, wherein: In each of the plurality of deformed scatterers, the length in the long-side direction is in the range of 50 nm to 500 nm, and the length in the short-side direction is in the range of 20 nm to 200 nm.

5. The display device according to claim 1, wherein: The core portion includes TiO2, SiO2, BaSO4, ZnO, Al2O3, CaCO3 or a combination thereof.

6. The display device according to claim 1, wherein: The metal coating portion includes Al, Cu or a combination thereof.

7. The display device according to claim 1, wherein: The source light includes blue light and green light.

8. The display device according to claim 1, wherein: The source light includes blue light, green light and red light, and The red light control portion includes the plurality of deformed scatterers and a plurality of second quantum dots, the plurality of second quantum dots being different from the plurality of first quantum dots.

9. The display device according to claim 1, wherein: The blue light controlling part includes a plurality of spherical scatterers.

10. The display device according to claim 1, wherein: The display layer includes a light emitting element for emitting the source light, and The light emitting element includes a first electrode, a second electrode facing the first electrode, and a light emitting portion provided between the first electrode and the second electrode.

11. A display device, wherein: The display device comprises: a first pixel region for emitting red light, a second pixel region for emitting green light, and a third pixel region for emitting blue light, wherein the first pixel region, the second pixel region, and the third pixel region are spaced apart from each other and do not overlap each other in a plan view, and the display device further comprises: A display panel including a light emitting element; and a light control panel, disposed on the display panel, the light control panel comprising a light control layer, the light control layer having a first light control portion corresponding to the first pixel region, a second light control portion corresponding to the second pixel region, and a third light control portion corresponding to the third pixel region, wherein: The second light control portion includes a plurality of first quantum dots and a plurality of rod-shaped deformed scatterers, wherein a length of each of the plurality of rod-shaped deformed scatterers in a first direction parallel to a thickness direction of the light control layer is 1.5 times or more of a length of each of the plurality of rod-shaped deformed scatterers in a second direction perpendicular to the first direction, Each of the plurality of rod-shaped deformed scatterers includes a rod-shaped core portion and a metal coating portion surrounding at least one of an upper surface and a lower surface of the core portion, and The upper surface and the lower surface of the core portion are spaced apart in the first direction.

12. The display device according to claim 11, wherein: The core portion includes TiO2, SiO2, BaSO4, ZnO, Al2O3, CaCO3 or a combination thereof, and The metal coating portion includes Al, Cu or a combination thereof.

13. The display device according to claim 11, wherein: The light emitting element emits source light including the blue light and the green light, The third light control portion includes a spherical scatterer, and The first light-controlling portion does not include a scatterer.

14. The display device according to claim 11, wherein: The light control panel further includes a color filter layer spaced apart from the display panel and disposed on the light control layer, and The color filter layer includes a first color filter overlapping the first pixel area in a plan view to transmit the red light, a second color filter overlapping the second pixel area in a plan view to transmit the green light, and a third color filter overlapping the third pixel area in a plan view to transmit the blue light.

15. A method for manufacturing a display device, wherein: The method comprises: forming a display panel including a light emitting element; and forming a light control layer, Wherein, the forming of the light control layer comprises: forming a partitioning pattern on the base portion, a plurality of openings being defined in the partitioning pattern; and forming a blue light control portion, a green light control portion, and a red light control portion, each of the blue light control portion, the green light control portion, and the red light control portion corresponding to a respective one of the plurality of openings, wherein The forming of the green light control portion includes: disposing a quantum dot ink including green quantum dots and a plurality of deformed scatterers in an opening corresponding to the green light control portion among the plurality of openings; aligning the plurality of deformed scatterers so that the plurality of long sides of the plurality of deformed scatterers are arranged parallel to the thickness direction of the green light control portion; and The quantum dot ink is cured after the aligning of the plurality of deformed scatterers, wherein, Each of the plurality of deformed scatterers includes: a core portion having a length in a long side direction that is 1.5 times or more longer than a length in a short side direction perpendicular to the long side direction; and a metal coating portion surrounding at least one of the upper portion and the lower portion of the core portion, and The upper portion and the lower portion of the core portion are spaced apart in the long side direction.

16. The method according to claim 15, wherein: The aligning of the plurality of deformed scatterers includes applying a magnetic field to the quantum dot ink disposed in the opening of the plurality of openings corresponding to the green light controlling portion.

17. The method according to claim 15, wherein: The core portion includes TiO2, SiO2, BaSO4, ZnO, Al2O3, CaCO3 or a combination thereof, and The metal coating portion includes Al, Cu or a combination thereof.

18. The method according to claim 15, wherein: The disposing of the quantum dot ink includes ejecting the quantum dot ink by an inkjet printing method.

19. The method according to claim 15, wherein: The curing of the quantum dot ink includes irradiating ultraviolet light into the quantum dot ink.

20. The method according to claim 15, wherein: The forming of the blue light control portion includes: jetting ink containing a plurality of spherical scatterers into an opening corresponding to the blue light controlling portion among the plurality of openings by an inkjet printing method; and The ejected ink is cured.

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