Display device

Abstract

A display device includes: a display layer providing source light; and a light control layer disposed on the display layer and including a plurality of light control portions differentiated from each other. At least one light control portion of the plurality of light control portions may include a quantum dot that converts a wavelength of the source light and a plate-like scatterer made of a layered double hydroxide to exhibit improved brightness and excellent display quality.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0110356 filed in the Korean Intellectual Property Office (KIPO) on August 23, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of the present disclosure described herein relate to a display device including a diffuser. 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 different types of light control parts according to pixels to generate color images. The light control part may only transmit a portion of the wavelength range of the source light or change the color of the source light. Some light control parts may change the characteristics of the light without changing the color of the source light.

[0005] A quantum dot material or the like is used in a light control portion of a display device, and in order to improve the display quality of the display device, it is necessary to develop a technology for improving light conversion efficiency or light transmission efficiency in the light control portion. Summary of the invention

[0006] Embodiments of the present disclosure provide a display device having improved display quality by increasing the transmittance and scattering effect of source light.

[0007] According to an embodiment, a display device may include: a display layer providing source light; and a light control layer provided on the display layer and including a plurality of light control parts distinguished from each other. At least one of the plurality of light control parts may include quantum dots converting the wavelength of the source light and a plate-like scatterer formed of a layered double hydroxide.

[0008] The plate-shaped diffuser may have a ratio of a maximum width of a surface to a thickness in a range of about 2:1 to about 10:1.

[0009] The maximum width may be in a range of about 5 nm to about 300 nm, and the thickness may be in a range of about 1 nm to about 50 nm.

[0010] The layered double hydroxide may be represented by the following Formula 1, where M 2+ It can be Zn, Co, Mg, Mn, Ni or Fe. 3+ It may be Fe, Co, Ni, Al, Ga or In, and X and Y may be independent of each other and greater than 0.

[0011] [Formula 1]

[0012] M 2+ X M 3+ Y (OH) (2X+3Y)

[0013] An amount of the plate-shaped diffuser may be in a range of about 0.1 wt % to about 20 wt % based on 100 wt % of the total weight of the plurality of light-controlling parts including the plate-shaped diffuser.

[0014] The plurality of light control parts may include a red light control part emitting red light and including first quantum dots and the plate-like scatterer, a green light control part emitting green light and including second quantum dots and the plate-like scatterer, and a blue light control part transmitting the source light.

[0015] The blue light controlling portion may include a spherical diffuser.

[0016] The blue light controlling portion may include the plate-shaped diffuser.

[0017] The source light may include blue light and green light.

[0018] The display layer 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, and the light emitting portion includes a light emitting element emitting the source light.

[0019] According to an embodiment, a display device may include: a display panel providing source light; and a light control panel disposed on the display panel and including an optical scattering layer including a plate-shaped scatterer made of a layered double hydroxide.

[0020] The plate-like scatterer may have a ratio of a maximum width of a surface to a thickness in a range of about 2:1 to about 10:1, the maximum width may be in a range of about 5 nm to about 300 nm, and the thickness may be in a range of about 1 nm to about 50 nm.

[0021] The plate-like scatterer can be represented by the following formula 1, where M 2+ It can be Zn, Co, Mg, Mn, Ni or Fe. 3+ It may be Fe, Co, Ni, Al, Ga or In, and X and Y may be independent of each other and greater than 0.

[0022] [Formula 1]

[0023] M 2+ X M3+ Y (OH)( 2X+3Y )

[0024] The light control panel may further include a color filter layer disposed on the optical scattering layer and including a red filter, a green filter, and a blue filter, and the source light may be white light.

[0025] According to an embodiment, a display device divided into a first pixel region emitting red light, a second pixel region emitting green light, and a third pixel region emitting blue light on a plane may include: a display panel including a light emitting element; and a light control panel including 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. The light control panel may be disposed on the display panel, the first light control portion may include a first quantum dot and a plate-like scatterer, the second light control portion may include a second quantum dot and the plate-like scatterer, and the plate-like scatterer may be formed of a layered double hydroxide.

[0026] The plate-like scatterer may have a ratio of a maximum width of a surface to a thickness in a range of about 2:1 to about 10:1, the maximum width may be in a range of about 5 nm to about 300 nm, and the thickness may be in a range of about 1 nm to about 50 nm.

[0027] The plate-like scatterer can be represented by the following formula 1, where M 2+ It can be Zn, Co, Mg, Mn, Ni or Fe. 3+ It may be Fe, Co, Ni, Al, Ga or In, and X and Y may be independent of each other and greater than 0.

[0028] [Formula 1]

[0029] M 2+ X M 3+ Y (OH) (2X+3Y)

[0030] The third light-controlling portion may include a spherical diffuser, and may not include the plate-shaped diffuser.

[0031] The light emitting element may emit source light including blue light and green light.

[0032] The light control panel may further include a color filter layer spaced apart from the display panel and disposed on the first light control portion, the second light control portion, and the third light control portion, and the color filter layer may include a first color filter disposed to correspond to the first pixel area and transmit red light, a second color filter disposed to correspond to the second pixel area and transmit green light, and a third color filter disposed to correspond to the third pixel area and transmit blue light. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other objects and features of the present disclosure will become apparent by describing in detail embodiments of the present disclosure with reference to the accompanying drawings.

[0034] Figure 1 is a perspective view showing a display device according to an embodiment.

[0035] Figure 2 is shown with Figure 1 Schematic cross-sectional view of the portion corresponding to line II' in FIG.

[0036] Figure 3 is a plan view of a display panel according to an embodiment.

[0037] Figure 4 is a plan view showing an enlarged portion of a display area in a display device according to an embodiment.

[0038] Figure 5 is a schematic cross-sectional view showing a part of a display device according to an embodiment.

[0039] Figure 6 is a schematic cross-sectional view showing a portion of a light control layer according to an embodiment.

[0040] Fig. 7A is a perspective view of a plate-shaped diffuser according to an embodiment.

[0041] Figure 7B is a schematic diagram showing the configuration of a portion of a plate-like scatterer according to the embodiment.

[0042] Figure 8 is a schematic cross-sectional view showing a light control layer according to an embodiment.

[0043] Fig. 9A is a schematic diagram illustrating an emission pattern of light from a spherical scatterer according to an embodiment.

[0044] Fig. 9B is a schematic diagram showing a light emission pattern of a plate-like scatterer according to an embodiment.

[0045] Fig.10 is a graph showing optical characteristics of source light based on wavelength according to an embodiment.

[0046] Fig.11A is a graph showing optical characteristics based on wavelength in a comparative example and an example.

[0047] Fig. 11B is a graph showing optical characteristics based on wavelength in a comparative example and an example.

[0048] Fig.12 is a schematic cross-sectional view of a display device according to an embodiment. DETAILED DESCRIPTION

[0049] The present disclosure may be subject to various changes and may have various forms. Therefore, specific embodiments will be shown in the accompanying drawings and will be described in detail in the text. However, this is not intended to limit the present disclosure to a specific form of the present disclosure, and it should be understood that the present disclosure encompasses all modifications, equivalents or substitutes that fall within the spirit and scope of the present disclosure.

[0050] When an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it may be directly on, directly connected to, or coupled to the other element or layer, or there may be intervening elements or layers. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or 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.

[0051] The same reference numerals refer to the same components. In addition, in the drawings, in order to effectively describe the technical content, the thickness, proportion and size of the components are exaggerated. "And / or" includes all one or more combinations that the associated components can define.

[0052] Although various components can be described using terms such as first and second, the components should not be limited by the terms. The above terms are only used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present disclosure, a first component can be named as a second component, and similarly, a second component can also be named as a first component. Unless the context clearly provides otherwise, a singular expression includes a plural expression.

[0053] For descriptive purposes, spatially relative terms such as "below," "beneath," "under," "down," "above," "on," "above," "higher," and "side" (e.g., in a "sidewall") may be used herein to describe the relationship of one element to other elements as shown in the figures. Spatially relative terms are intended to cover different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device is flipped in the accompanying drawings, an element described as being "below" or "below" other elements or features would subsequently be positioned as being "above" the other elements or features. Thus, the exemplary term "below" can cover both "above" and "below" orientations. In addition, the device may be otherwise positioned (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are therefore interpreted accordingly.

[0054] The terms used in this article are only for the purpose of describing specific embodiments, and are not intended to be restrictive. As used in this article, unless the context clearly indicates otherwise, the singular "one", "a kind of" and "the (the)" are also intended to include plural forms. In addition, when the terms "comprise", "include", "have" and / or "contain" are used in this specification, it is explained that there are stated features, integers, steps, operations, elements, components and / or their groups, but it is not excluded that there are or add one or more other features, integers, steps, operations, elements, components and / or their groups. It is also pointed out that, as used in this article, the terms "substantially", "approximately" and other similar terms are used as approximate terms rather than terms of degree, so that the inherent deviations of measured values, calculated values ​​and / or setting values ​​that will be recognized by those of ordinary skill in the art are explained.

[0055] In the specification and claims, for the purpose of its meaning and interpretation, the phrase "at least one of..." is intended to include the meaning of "at least one of the group selected from...". For example, "at least one of A and B" may be understood to mean "A, B, or A and B". In the specification and claims, for the purpose of its meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in a connecting or disconnecting sense and may be understood to be equivalent to "and / or".

[0056] As used herein, "Group" refers to a Group of the International Union of Pure and Applied Chemistry (IUPAC) Periodic Table.

[0057] 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). However, the present disclosure is not limited thereto.

[0058] As used herein, "Group III" may include Group IIIA elements and Group IIIB elements. For example, Group III elements may be aluminum (Al), indium (In), gallium (Ga). However, the present disclosure is not limited thereto.

[0059] 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). However, the present disclosure is not limited thereto.

[0060] As used herein, "Group VI" may include Group VIA elements and Group VIB elements. For example, Group VI may be oxygen (O), sulfur (S), selenium (Se), or tellurium (Te). However, the present disclosure is not limited thereto.

[0061] Unless otherwise defined, 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 be further understood that, unless explicitly defined as such herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense.

[0062] Hereinafter, a display device according to one embodiment of the present disclosure and a method for manufacturing the display device according to one embodiment will be described with reference to the accompanying drawings.

[0063] Figure 1 is a perspective view showing a display device according to an embodiment. Figure 2 is a schematic cross-sectional view of a display device according to an embodiment. Figure 2 is shown with Figure 1 Schematic cross-sectional view of the portion corresponding to line II' in FIG.

[0064] In one embodiment, the display device DD may be a device that is activated in response to an electrical signal. For example, the display device DD may be a large device such as a television, a monitor, or an external billboard. The display device DD may be a small or medium-sized device such as a personal computer (e.g., a laptop computer, a tablet computer), a personal digital terminal, a vehicle navigation unit, a game console, a smart phone, and a camera. However, the present disclosure is not limited thereto, and the display device DD may be used as other electronic devices without departing from the concept of the present disclosure.

[0065] The display device DD may be rigid or flexible. The term "flexible" refers to the property of being able to bend. For example, a flexible display device DD may include a bendable device, a rollable device, or a foldable device.

[0066] Figure 1 The following figures show the first direction axis DR1 to the third direction axis DR3. The directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 described in this document are relative concepts and can be converted into other directions. The directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 may be referred to as the first direction DR1, the second direction DR2, and the third direction DR3, and the same reference numerals may be used. In this document, the first direction axis DR1 and the second direction axis DR2 may be orthogonal to each other, and the third direction axis DR3 may be a normal direction of a plane defined by the first direction axis DR1 and the second direction axis DR2.

[0067] The thickness direction DR3 of the display device DD may be a direction parallel to the third directional axis DR3, which is a normal direction of a plane defined by the first directional axis DR1 and the second directional axis DR2. In this article, the front surface (or top surface) and the rear surface (or bottom surface) of the components constituting the display device DD may be defined based on the third directional axis DR3. The front surface (or top surface) and the rear surface (or bottom surface) of each component constituting the display device DD may be facing 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 spacing distance between the front surface and the rear surface defined along the third direction DR3 may correspond to the thickness of the component.

[0068] Herein, "on a plane" or "in a plan view" may be defined as a state observed in the third direction DR3. Herein, "in a cross section" or "in a cross-sectional view" may be defined as a state observed 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 are relative concepts and can be converted into other directions.

[0069] The display device DD may display an image (or video) via 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 units PXU may be disposed in the display area DA, and the pixel units PXU may not be disposed in the non-display area NDA. The non-display area NDA may be defined along an edge of the display surface IS. The non-display area NDA may surround the display area DA. However, the present disclosure may not be limited thereto. In one embodiment of the present disclosure, the non-display area NDA may be omitted, or the non-display area NDA may be located only on one side of the display area DA.

[0070] The pixel unit PXU may define pixel rows and pixel columns. The pixel unit PXU may be a minimum repeating unit. The pixel unit PXU may include at least one pixel. The pixel unit PXU may include a plurality of pixels providing light of different colors.

[0071] exist Figure 1 In the embodiment, a display device DD having a flat display surface IS is shown, but the present disclosure is not limited thereto. In another embodiment, 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 pointing in different directions.

[0072] refer to Figure 2 According to one embodiment, a 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 sequentially stacked in a direction indicated by a third directional axis DR3. The light control panel OP may be disposed on the display layer DP-ED. In one embodiment of the display device DD, the light control panel OP may be directly disposed on the display layer DP-ED.

[0073] Herein, the first component "directly disposed / directly formed" on the second component may mean that the third component is not disposed between the first component and the second component. In other words, the first component "directly disposed / directly formed" on the second component may mean that the first component is "in contact" with the second component.

[0074] Although not shown, in one embodiment, a charging 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 spaced apart from each other, with the charging layer (not shown) interposed between the display panel DP and the light control panel OP. The light control panel OP may be manufactured in a separate process step and provided on the display panel DP.

[0075] In one 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.

[0076] In the display device DD in one embodiment, the base layer BS may be a supporting substrate, and the circuit layer DP-CL and the display layer DP-ED are arranged on the supporting substrate. 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 deposition, etc., and a process of patterning the insulating layer, the semiconductor layer and the conductive layer by a photolithography process.

[0077] 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 top of the display panel DP.

[0078] 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 part converting the wavelength of light or transmitting light and a structure for improving conversion efficiency of emitted light.

[0079] Figure 3 is a plan view of a display panel according to an embodiment. Figure 3 The planar arrangement relationship between 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.

[0080] Each of the pixels PX11 to PXnm may be connected to a corresponding gate line among the gate lines GL1 to GLn and a corresponding data line among the data lines DL1 to DLm. Each of the pixels PX11 to PXnm may include a pixel driving circuit and a display element. According to the configuration of the pixel driving circuit of each of the pixels PX11 to PXnm, more types of signal lines may be provided on the display panel DP.

[0081] although Figure 3 The pixels PX11 to PXnm in a matrix form are shown as an embodiment, but the present disclosure is not limited thereto. In another embodiment, the pixels PX11 to PXnm may be arranged in a matrix. For example, the points where the pixels PX11 to PXnm are arranged may correspond to the vertices of the diamond shape. The gate driving circuit GDC may be integrated into the display panel DP via an oxide silicon gate (OSG) driving circuit or an amorphous silicon gate (ASG) driving circuit process.

[0082] Figure 4 is a plan view showing an enlarged portion of a display area in a display device according to an embodiment.

[0083] refer to Figure 4 In one embodiment, the pixel unit PXU may be arranged in a first direction DR1 and a second direction DR2. In one embodiment, the pixel unit 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 output 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 are shown, which respectively represent a first pixel, a second pixel, and a third pixel. The first pixel region PXA-R may be a region where light generated from the first pixel is provided to the outside, the second pixel region PXA-G may be a region where light generated from the second pixel is provided to the outside, and the third pixel region PXA-B may be a region where light generated from the third pixel is provided to the outside. The first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be distinguished from each other in a plan view without overlapping each other.

[0084] In one 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, the present disclosure is not limited thereto. In another embodiment, in addition to the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B, the display area DA may further include a pixel region that emits white light.

[0085] 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 in a plan view. The peripheral area NPXA may be arranged 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 set the boundaries of the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B, and prevent color mixing between the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B. In the peripheral area NPXA, 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 arranged, for example, a pixel defining layer PDL ( Figure 5 ) or partition pattern BMP( Figure 5 )wait.

[0086] Figure 4 1 shows a display device DD ( 1000 ) including a first pixel region PXA-R, a second pixel region PXA-G, and a third pixel region PXA-B having the same shape and different area sizes in a plan view as an embodiment. Figure 1 ), but the present disclosure is not limited thereto. In another embodiment, the area sizes of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may all be the same, or the area size of at least one type of pixel region may be different from the area sizes of the remaining types of pixel regions. The area sizes of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be set based on the color of the emitted light.

[0087] refer to Figure 4 , the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may have a rectangular shape in a plan view. However, the present disclosure is not limited thereto. The first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may have other polygonal shapes (including substantially polygonal shapes) such as a rhombus or pentagonal shape 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 rounded rectangular shape (substantially a rectangular shape) in a plan view.

[0088] Figure 4An embodiment in which the second pixel region PXA-G is arranged in the first row and the first pixel region PXA-R and the third pixel region PXA-B are arranged in the second row is shown, but the present disclosure is not limited thereto. The arrangement of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be changed in various ways. For example, the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be arranged in the same row.

[0089] The pixel regions PXA-R, PXA-G, and PXA-B may be arranged in stripe shapes, Arrangement or Diamond However, the present disclosure is not limited thereto. The arrangement order and arrangement form of the pixel regions PXA-R, PXA-G, and PXA-B may be based on the display device DD ( Figure 1 )The characteristics of the required display quality are provided in various combinations.

[0090] 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 cross-sectional view of the portion corresponding to line II-II'.

[0091] refer to Figure 5 In one embodiment, the display panel DP may include a base layer BS, a circuit layer DP-CL disposed on the base layer BS, 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 the light emitting element ED from above.

[0092] In a display device DD according to an 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 is an organic electroluminescent display panel, the display layer DP-ED may include an organic electroluminescent light-emitting element as the light-emitting element ED. However, the present disclosure is not limited thereto. For example, the display layer DP-ED may include a quantum dot light-emitting element as the 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 the light-emitting element ED.

[0093] The display panel DP may provide source light. The light emitting element ED may generate source light. The source light generated and output 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 optically converted into light having a wavelength different from that of the source light, or at least a portion of the source light may be transmitted in the light control layer CCL of the light control panel OP without wavelength conversion.

[0094] In the display panel DP, the base layer BS may be a member providing a base surface on which the circuit layer DP-CL and the display layer DP-ED are disposed. The base layer BS may be a glass substrate, a metal substrate, a polymer substrate, etc. However, the present disclosure is not limited thereto, and the base layer BS may be an inorganic layer, a functional layer, or a composite material layer.

[0095] 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. For example, the polymer resin layer may include a polyimide resin. In another embodiment, the polymer resin layer may include at least one of an acrylate resin, a methacrylate resin, a polyisoprene resin, a vinyl resin, an epoxy resin, a polyurethane resin, a cellulose resin, a siloxane resin, a polyamide resin, and a perylene resin. An "α-type" resin may refer to a resin containing a functional group of "α".

[0096] 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 (for example, 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 via coating or deposition, etc., and the insulating layer, the semiconductor layer, and the conductive layer may be selectively patterned by multiple photolithography processes. Thereafter, a semiconductor pattern and a conductive pattern included in the circuit layer DP-CL may be formed. In one embodiment, the circuit layer DP-CL may include a transistor, a buffer layer, and a plurality of insulating layers. In one embodiment, the circuit layer DP-CL may include a plurality of transistors (not shown). Each of the plurality of transistors (not shown) may 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.

[0097] 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 one embodiment, the source light may include blue light and green light. In another embodiment, the source light may be white light, and the source light may include blue light, green light and red light. In another embodiment, the source light may include only light within the wavelength range of blue light.

[0098] In one 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 one 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 top of the second electrode EL2.

[0099] 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, light emitting areas EA1, EA2, and EA3 may be defined as corresponding to a partial area of ​​the first electrode EL1 exposed by the light emitting opening OH.

[0100] The pixel defining layer PDL may be made of a polymer resin. For example, the pixel defining layer PDL may include a polyacrylate resin or a polyimide resin. In addition to the polymer resin, the pixel defining layer PDL may also include an inorganic material. In one embodiment, the pixel defining layer PDL may include a light absorbing material, a black pigment, or a black dye. The pixel defining layer PDL including a black pigment or a black dye may realize a black pixel defining layer. When forming the pixel defining layer PDL, carbon black or the like may be used as the black pigment or the black dye, but the present disclosure is not limited thereto.

[0101] The pixel defining layer PDL may be made of an inorganic material. For example, the pixel defining layer PDL may be made of a material such as silicon nitride (SiN x ), silicon oxide (SiO x ) and silicon oxynitride (SiO x N y ) of inorganic materials.

[0102] 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. In this document, the term "corresponding" may mean that two components overlap each other in the thickness direction DR3 of the display device DD, and the components are not limited to having the same area size.

[0103] The light-emitting areas EA1, EA2, and EA3 may overlap the pixel areas PXA-R, PXA-G, and PXA-B in the thickness direction DR3, respectively. In a plan view, the area size of the pixel areas PXA-R, PXA-G, and PXA-B divided by the partition pattern BMP may be larger than the area size of the light-emitting areas EA1, EA2, and EA3 divided by the pixel defining layer PDL.

[0104] 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 at 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 electrode, or a reflective electrode.

[0105] The second electrode EL2 may be disposed on the first electrode EL1. The second electrode EL2 may be a cathode or an anode. In one embodiment, when the first electrode EL1 is an anode, the second electrode EL2 may be a cathode, and when the first electrode EL1 is a cathode, the second electrode EL2 may be an anode. The second electrode EL2 may be a common electrode. However, the present disclosure is not limited thereto. The second electrode EL2 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0106] In one embodiment, the light emitting portion ELS may be provided as a single light emitting layer or a light emitting stack in which a plurality of light emitting units are stacked on each other. In the case where the light emitting portion ELS is a light emitting stack in which light emitting units are stacked on each other, the light emitting portion ELS may include two or more light emitting stacks that are distinguished from each other and stacked in a third direction DR3 as a thickness direction DR3. Each of the plurality of light emitting units may include at least one light emitting layer.

[0107] For example, in one 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 units. However, the present disclosure is not 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. In another embodiment, the light emitting portion ELS may include a plurality of light emitting units emitting light in the same wavelength region.

[0108] The light-emitting layer included in the light-emitting portion ELS may have a single layer made of a single material, a single layer made of different materials, or a multilayer structure having a plurality of layers made of different materials. The light-emitting layer may contain a fluorescent or phosphorescent material. In the light-emitting element ED in one embodiment, the light-emitting portion ELS may contain an organic light-emitting material, an organic metal complex, a quantum dot, or the like as a light-emitting material.

[0109] 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. The non-light emitting area may be a portion overlapping the pixel defining layer PDL in the thickness direction DR3. However, the present disclosure is not limited thereto. In one embodiment, the light emitting portion ELS may be disposed in the light emitting opening OH. For example, the light emitting portion ELS may be disposed to be separated so that the separated portions of the light emitting portion ELS correspond to the first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3 divided by the pixel defining layer PDL, respectively.

[0110] 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 emission area EA1, the second emission area EA2, and the third emission area EA3 and the non-emission area. In one embodiment, the hole transport region HTR may be disposed as a common layer with the first electrode EL1 in the thickness direction DR3. Figure 4 , the plurality of pixel units PXU of the display area DA shown in FIG. overlap. However, the present disclosure is not limited thereto, and the hole transport region HTR may be disposed to be separated from each other so that the separated portions of the hole transport region HTR correspond to the first emission area EA1, the second emission area EA2, and the third emission area EA3, respectively. The hole transport region HTR may include at least one of a hole transport layer, a hole injection layer, and an electron blocking layer.

[0111] 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, the present disclosure is not limited thereto, and the electron transport region ETR may be disposed to be separated from each other so that the separated portions of the electron transport region ETR correspond to the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3, respectively.

[0112] The encapsulation layer TFE may be disposed on the second electrode EL2. In another embodiment, when 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.

[0113] The encapsulation layer TFE may be a thin film encapsulation layer. The encapsulation layer TFE may be a stack of a single layer or multiple layers. The encapsulation layer TFE may include at least one insulating layer. The encapsulation layer TFE according to one embodiment may include at least one inorganic film (hereinafter referred to as an encapsulation inorganic film). In another embodiment, the encapsulation layer TFE according to one embodiment may include at least one organic film (hereinafter referred to as an encapsulation organic film) and at least one encapsulation inorganic film.

[0114] The encapsulated inorganic film can protect the light-emitting element ED from moisture / oxygen, and the encapsulated organic film can protect the light-emitting element ED from foreign matter such as dust particles. The encapsulated inorganic film may include silicon nitride, silicon oxynitride, silicon oxide, titanium oxide, or aluminum oxide, etc., but the present disclosure is not particularly limited thereto. The encapsulated organic film may include an acrylic compound or an epoxy compound, etc. The encapsulated organic film may include a photopolymerizable organic material, but the present disclosure is not particularly limited thereto.

[0115] The light control panel OP may be disposed on the display panel DP. Figure 5 In the display device DD in one embodiment shown in , the light control panel OP may be directly disposed on the display panel DP. However, the present disclosure is not limited thereto, and as described above, the display device DD may include a charging layer (not shown) disposed between the display panel DP as a lower panel and the light control panel OP as an upper panel.

[0116] In one embodiment, the light control panel OP may include a light control layer CCL. Figure 5 In one embodiment shown in , the light control layer CCL may be disposed on the encapsulation layer TFE. In one embodiment, in addition to the light control layer CCL, the light control panel OP may further include a low refractive index layer LR, a color filter layer CFL, and a base substrate BL.

[0117] In one 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.

[0118] The light control layer CCL may include a segmentation pattern BMP. The segmentation pattern BMP may be a component that distinguishes the light control parts CCP-R, CCP-G, and CCP-B from each other. The segmentation pattern BMP may include a base resin and an additive. The base resin may be made of various resin compositions that may be generally referred to as an adhesive. The additive may include a coupling agent and / or a photoinitiator. The additive may also include a dispersant.

[0119] The partition pattern BMP may include a black colorant for light blocking. The partition pattern BMP may include a black dye or a black pigment mixed into a base resin. In one embodiment, the partition pattern BMP may include carbon black, or may include a metal such as chromium or an oxide thereof.

[0120] In the partition pattern BMP, an opening BW-OH corresponding to the light emitting opening OH may be defined. In a plan view, the opening BW-OH may overlap with the light emitting opening OH and may have an area size larger than that of the light emitting opening OH. For example, the opening BW-OH may have an area size larger than that of 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.

[0121] In one 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. In another embodiment, the third light control portion CCP-B may be a transmissive light control portion that transmits and emits source light.

[0122] exist Figure 5 In the light control panel OP according to one embodiment shown in , the base substrate BL may be a member providing a reference surface, and the color filter layer CFL, the low refractive index layer LR, the light control layer CCL, etc. are arranged on the reference surface. The base substrate BL may be a glass substrate, a metal substrate, a plastic substrate, etc. However, the present disclosure is not limited thereto, and the base substrate BL may be an inorganic layer, an organic layer, or a composite material layer. In another embodiment, the base substrate BL may be omitted.

[0123] 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 one embodiment, the anti-reflection layer may be a single layer containing a dye and / or a pigment dispersed in a matrix resin. The anti-reflection layer may be provided as a continuous layer that completely overlaps all of the first pixel regions PXA-R, the second pixel regions PXA-G, and the third pixel regions PXA-B in the thickness direction DR3.

[0124] The anti-reflection layer may not include a polarizing layer. Therefore, the light passing through the anti-reflection layer and incident on the display layer DP-ED may be non-polarized light. The display layer DP-ED may receive non-polarized light from above the anti-reflection layer.

[0125] In one embodiment, the light control layer CCL may include barrier layers CAP-B and CAP-T. The barrier layers CAP-B and CAP-T may prevent the penetration of moisture and / or oxygen (hereinafter referred to as "moisture / oxygen") and adjust the refractive index to improve the optical properties of the light control panel OP. The barrier layers CAP-B and CAP-T may be disposed at the upper or lower portion of the light control layer CCL. The barrier layers CAP-B and CAP-T may be disposed on the top or bottom surface of the light control parts CCP-R, CCP-G, and CCP-B to block the light control parts CCP-R, CCP-G, and CCP-B from being exposed to moisture / oxygen, for example, to block the quantum dots contained in the light control parts CCP-R, CCP-G, and CCP-B 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 impacts.

[0126] In one embodiment, the first barrier layer CAP-T may be spaced apart from the display layer DP-ED, and the light control parts CCP-R, CCP-G, and CCP-B are between the first barrier layer CAP-T and the display layer DP-ED. For example, the first barrier layer CAP-T may be disposed on the top surface of the light control parts CCP-R, CCP-G, and CCP-B. In one 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 one embodiment, the first barrier layer CAP-T may cover the top surface of the light control parts CCP-R, CCP-G, and CCP-B adjacent to the low refractive index layer LR, and the second barrier layer CAP-B may cover the bottom surface of the light control parts CCP-R, CCP-G, and CCP-B adjacent to the display layer DP-ED. The "top surface" may be a surface located above in the third direction DR3, and the "bottom surface" may be a surface located below in the third direction DR3.

[0127] The first barrier layer CAP-T and the second barrier layer CAP-B may cover surfaces of the partition patterns BMP and the light-controlling parts CCP-R, CCP-G, and CCP-B.

[0128] The first barrier layer CAP-T may cover the partition pattern BMP and the surface of each of the light-controlling parts CCP-R, CCP-G, and CCP-B adjacent to the low refractive index layer LR. The first barrier layer CAP-T may be disposed to follow the steps of the partition pattern BMP and the light-controlling parts CCP-R, CCP-G, and CCP-B.

[0129] The first barrier layer CAP-T and the second barrier layer CAP-B may include an inorganic material. In one embodiment, the first barrier layer CAP-T may include silicon oxynitride (SiO x N y ). Both the first barrier layer CAP-T and the second barrier layer CAP-B may include silicon oxynitride. However, the first barrier layer CAP-T may include silicon oxynitride, and the second barrier layer CAP-B may include silicon oxide (SiO x ), but is not limited thereto.

[0130] 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 one or more color filters CF1, CF2, and CF3. The color filter may transmit light within a specific wavelength range and block light outside the corresponding wavelength range. In one embodiment, the first color filter CF1 may be a red color filter that transmits red light, the second color filter CF2 may be a green color filter that transmits green light, and the third color filter CF3 may be a blue color filter that transmits blue light.

[0131] Each of the color filters CF1, CF2, and CF3 may include a polymer photosensitive resin and a colorant. The colorant may include a pigment or a dye. 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 one embodiment, the third color filter CF3 may not include a pigment or a dye.

[0132] The first color filter CF1, the second color filter CF2, and the third color filter CF3 may be arranged to correspond to the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B, respectively. The first color filter CF1, the second color filter CF2, and the third color filter CF3 may overlap the first light control part CCP-R, the second light control part CCP-G, and the third light control part CCP-B, respectively, in the thickness direction DR3.

[0133] refer to Figure 5, the color filters CF1, CF2, and CF3 that transmit light of different colors may overlap with each other in the peripheral area NPXA. When the color filters CF1, CF2, and CF3 are arranged to overlap with each other in the third direction DR3 as the thickness direction DR3 in the peripheral area NPXA, the boundaries between the adjacent pixel areas PXA-R, PXA-G, and PXA-B may be distinguished. In another embodiment, the color filter layer CFL may include a light shielding portion (not shown) to distinguish the boundaries between the adjacent color filters CF1, CF2, and CF3. The light blocking portion (not shown) may be formed of a blue filter, or may be made of an organic light blocking material or an inorganic light blocking material containing a black pigment or a black dye.

[0134] refer to Figure 5 In one embodiment, the light control panel OP may further include a low refractive index layer LR. The low refractive index layer LR may be disposed between the light control layer CCL and the color filters CF1, CF2, and CF3. The low refractive index layer LR may be disposed between the light control parts CCP-R, CCP-G, and CCP-B and the color filters CF1, CF2, and CF3, and perform the function of an optical functional layer, such as improving light extraction efficiency of light emitted from the light control layer CCL or preventing reflected light from entering the light control layer CCL. The low refractive index layer LR may be a layer having a relatively low refractive index compared to adjacent layers.

[0135] The low refractive index layer LR may include at least one inorganic layer. For example, the low refractive index layer LR may be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride or a light-transmitting metal film. However, the present disclosure is not limited thereto, and the low refractive index layer LR may include an organic film. For example, the low refractive index layer LR may have a structure in which a plurality of hollow particles are dispersed in an organic polymer resin. The low refractive index layer LR may be composed of a single layer or a plurality of layers.

[0136] In one embodiment, the light control panel OP may further include a buffer layer FML. In one embodiment, the buffer layer FML may fill a space between the light control layer CCL and the color filter layer CFL.

[0137] The buffer layer FML may be used as a buffer between the light control layer CCL and the color filter layer CFL. In one embodiment, the buffer layer FML may be used as a shock absorber, 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.

[0138] The buffer layer FML may be formed of a filling resin including a polymer resin. For example, the buffer layer FML may be formed of a filling resin including an acrylate resin or an epoxy resin. In another embodiment, the buffer layer FML may be an inorganic layer including at least one inorganic material such as silicon nitride, silicon oxide, and silicon oxynitride. The buffer layer FML may be composed of a single layer or a plurality of layers. In another embodiment, the buffer layer FML may be omitted, and the color filter layer CFL may be directly disposed on the light control layer CCL.

[0139] In one embodiment, although not shown, the light control panel OP may further include a scattering layer. The scattering layer may include a plate-shaped scatterer to be described below. The scattering layer may disperse the light emitted from the display layer DP-ED and provide the dispersed light to the light control layer CCL. In another embodiment, the scattering layer may be disposed on top of the light control layer CCL and disperse the light emitted from the light control layer CCL.

[0140] Figure 6 is a schematic cross-sectional view showing a portion of a light control layer according to an embodiment. The light control layer CCL in one embodiment may include a first light control part CCP-R, a second light control part CCP-G, and a third light control part CCP-B separated from each other by a partition pattern BMP. In one embodiment, at least one of the light control parts CCP-R, CCP-G, and CCP-B may include a plate-like scatterer MSP. The plate-like scatterer MSP may have a plate shape in which the width of the top surface or the bottom surface is greater than the thickness. The plate-like scatterer MSP may have a thickness and width ranging from a few nanometers (nm) to hundreds of nm. The plate-like scatterer MSP may also be referred to as a nanoplate scatterer.

[0141] In one embodiment, the first pixel region PXA-R ( Figure 5 ) may include a first quantum dot QD-R and may be connected to a second pixel region PXA-G ( Figure 5 ) The second light control part CCP-G corresponding to the first light control part CCP-R may include the second quantum dot QD-G. The first light control part CCP-R and the second light control part CCP-G may include the matrix resin BR, respectively, and may have the first quantum dot QD-R and the second quantum dot QD-G dispersed in the matrix resin BR, respectively.

[0142] In one embodiment, at least one of the first light-control part CCP-R and the second light-control part CCP-G may include a plate-like scatterer MSP. In one embodiment, only the second light-control part CCP-G may include a plate-like scatterer MSP, or both the first light-control part CCP-R and the second light-control part CCP-G may include a plate-like scatterer MSP. The plate-like scatterer MSP may be dispersed in the matrix resin BR.

[0143] The plate-like scatterer MSP may be made of a layered double hydroxide. In one embodiment, the plate-like scatterer MSP may include a layered double hydroxide, which is a compound represented by Formula 1 below.

[0144] [Formula 1]

[0145] M 2+ X M 3+ Y (OH) (2X+3Y)

[0146] In formula 1, M 2+ can be a divalent metal ion, and M 3+ It can be a trivalent metal ion. In one embodiment, M 2+ can be Zn, Co, Mg, Mn, Ni or Fe, and M 3+ It may be Fe, Co, Ni, Al, Ga, or In. In Formula 1, each of X and Y may be greater than zero.

[0147] In one embodiment, the plate-like scatterer MSP may be made of hydroxides of divalent metal ions and trivalent metal ions. In the layered double hydroxide represented by Formula 1, Zn, Mg, or Mn may be included as divalent ions, Al, Ga, or In may be included as trivalent ions, and Fe, Co, or Ni may be included as divalent ions or trivalent ions. For example, in one embodiment, the plate-like scatterer MSP may be Mg 2 Al(OH) 7 However, the present disclosure is not limited thereto.

[0148] Fig. 7A and 7B is a schematic diagram showing a plate-shaped scatterer according to an embodiment. Fig. 7A is a perspective view of a plate-shaped diffuser according to an embodiment, and Figure 7B is a schematic diagram showing the configuration of a portion of a plate-like scatterer according to the embodiment. Figure 7B Can be Fig. 7A Magnified view of area "AA".

[0149] refer to Fig. 7AAccording to one embodiment, the plate-like scatterer MSP may have a maximum width W in a plan view. SP Significantly greater than thickness t SP The maximum width W in the plan view SP It may correspond to the maximum width on the surface US-SP with a large surface area size (eg, the top surface or the bottom surface). The thickness t of the plate-like scatterer MSP SP May correspond to a vertical dimension in a direction perpendicular to a surface having a large surface area (eg, a top surface or a bottom surface).

[0150] In a plate-like scatterer MSP according to an embodiment, the maximum width W in a plan view SP With thickness t SP The ratio of may be in the range of about 2:1 to about 10:1. The maximum width W SP can be in the range of about 5 nm to about 300 nm, and the thickness t SP It may be in the range of about 1 nm to about 50 nm.

[0151] According to one embodiment, the plate-like scatterer MSP may have a small thickness equal to or less than about 50 nm, so that the proportion of incident light in the thickness direction passing through the plate-like scatterer MSP and being emitted may be high. In other words, the plate-like scatterer MSP may have a small thickness equal to or less than tens of nanometers, thereby increasing the transmittance of light passing through the plate-like scatterer MSP to increase the transmittance of the optical layer containing the plate-like scatterer MSP.

[0152] In a plate-like scatterer MSP, the surface US-SP with a large surface area can have a polygonal shape in a plan view. Fig. 7A , the plate-like scatterer MSP may have a hexagonal shape in a plan view. However, the present disclosure is not limited thereto, and the plate-like scatterer MSP may have any shape without limitation, as long as the plate-like scatterer MSP has a maximum width W in a plan view. SP Significantly greater than thickness t SP The plate shape is enough.

[0153] Figure 7B yes Fig. 7A Magnified view of area "AA". Figure 7B, the plate-like scatterer MSP may include a plurality of metal hydroxide layers MOL1 to MOLn (i.e., metal hydroxide layers MOL1, MOL2, MOL3, ..., MOLn-1, and MOLn) stacked in the thickness direction. n may be a positive integer. The ionic ligand ATL may be disposed between the metal hydroxide layers MOL1 to MOLn to combine adjacent metal hydroxide layers MOL1 to MOLn with each other. For example, in one embodiment, the plate-like scatterer MSP may include two or more metal hydroxide layers MOL1 to MOLn and anionic ligands disposed between the metal hydroxide layers MOL1 to MOLn. In one embodiment, the thickness t of the plate-like scatterer MSP is SP May correspond to a total height in a direction in which the metal hydroxide layers MOL1 to MOLn are stacked.

[0154] although Figure 7B Each of the metal hydroxide layers MOL1 to MOLn is schematically illustrated as one layer, but the present disclosure is not limited thereto, and in another embodiment, in each of the metal hydroxide layers MOL1 to MOLn, a plurality of metal hydroxide units may be bonded to each other.

[0155] Charges may be formed on the surface US-SP of the plate-like scatterer MSP. Therefore, the plate-like scatterers MSP may not aggregate with each other and may be arranged to be spaced apart from each other at regular intervals. Therefore, the plate-like scatterer MSP according to one embodiment may be dispersed in the matrix resin BR ( Figure 6 ), and therefore, the source light can be uniformly transmitted to the first quantum dot QD-R ( Figure 6 ) and the second quantum dot QD-G( Figure 6 ).

[0156] Reference again Figure 5 and Figure 6 , the first light control part CCP-R can emit red light by converting the wavelength of the source light provided from the display layer DP-ED. A portion of the source light can be emitted through the first light control part CCP-R without converting the wavelength. The second light control part CCP-G can emit green light by converting the wavelength of the source light provided from the display layer DP-ED. A portion of the source light can be emitted through the second light control part CCP-G without converting the wavelength. In one embodiment, the first light control part CCP-R and the second light control part CCP-G can respectively include a first quantum dot QD-R and a second quantum dot QD-G that convert the wavelength of at least a portion of the source light.

[0157] In one embodiment, the third light control part CCP-B may not include quantum dots. However, the present disclosure is not 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 wavelength range different from the wavelength range of light of the first light control part CCP-R and the second light control part CCP-G.

[0158] In the light control layer CCL in one embodiment, the light control parts CCP-R and CCP-G may include a plate-like scatterer MSP in an amount ranging from about 0.1 wt % to about 20 wt % based on 100 wt % of the total weight. In the case where the plate-like scatterer MSP is included in an amount less than 0.1 wt %, the dispersion effect of the source light may be reduced, and in the case where the plate-like scatterer MSP is included in an amount greater than 20 wt %, light absorption in the plate-like scatterer MSP may increase and light transmittance may be reduced.

[0159] In the light-control layer CCL according to one embodiment, the first light-control part CCP-R may include the first quantum dot QD-R, and the second light-control part CCP-G may include the second quantum dot QD-G.

[0160] The first quantum dot QD-R 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 by the first quantum dot QD-R. For example, the first quantum dot QD-R can convert a portion of the source light in the blue wavelength range into red light. The first quantum dot QD-R that converts the wavelength of the received light and emits red light can be referred to as a red quantum dot. In an embodiment, some of the first quantum dot QD-R can convert a portion of the source light in the green wavelength range into red light.

[0161] The second quantum dot QD-G may be different from the first quantum dot QD-R. The second quantum dot QD-G may convert the optical properties of at least a portion of the source light provided from the display layer DP-ED. For example, the second quantum dot QD-G may convert a portion of the source light within a blue wavelength range into green light. The second quantum dot QD-G that converts the wavelength of the received light and emits green light may be referred to as a green quantum dot.

[0162] The quantum dots included in the light control layer CCL in one embodiment may be crystals of semiconductor compounds. The contents regarding the quantum dots to be described below may be applied to the first quantum dots QD-R and the second quantum dots QD-G.

[0163] Quantum dots can emit light with a wavelength that depends on the size of the crystal. Quantum dots can emit light with various wavelengths by adjusting the ratio of elements in the quantum dot compound.

[0164] The diameter of the quantum dots may be, for example, in the range of about 1 nm to 10 nm.The quantum dots may be synthesized via a wet chemical process, a metal organic chemical vapor deposition process, a molecular beam epitaxy process, or a similar process.

[0165] Among the quantum dot production processes, the wet chemical process can be a method of growing quantum dot particle crystals after mixing an organic solvent with a precursor material. When the quantum dot particle crystals grow, the organic solvent can naturally act as a dispersant that coordinates with the surface of the quantum dot crystal and adjusts the growth of the particle crystals. Therefore, the wet chemical process can be performed more easily than vapor deposition methods such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE), and the growth of quantum dot particles can be controlled with a low-cost process.

[0166] The core of the quantum dot may include 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.

[0167] The II-VI compound may be selected from the group consisting of binary compounds such as CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and quaternary compounds such as HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and mixtures thereof. In one embodiment, the II-VI semiconductor compound may further comprise a Group I metal and / or a Group IV element. The I-II-VI compound may be selected from CuZnS, and the II-IV-VI compound may be selected from ZnSnS, etc. The I-II-IV-VI compound may be selected from quaternary compounds such as Cu 2 ZnSnS 2 , Cu 2 ZnSnS 4 , Cu 2 ZnSnSe 4 、Ag 2 ZnSnS 2 and mixtures thereof.

[0168] III-VI compounds may include: binary compounds such as In 2 S 3 andIn 2 Se 3 etc.; ternary compounds such as InGaS 3 and InGaSe 3 etc.; or any combination thereof.

[0169] The I-III-VI group compounds may be selected from: ternary compounds such as AgInS, AgInS 2 、CuInS、CuInS 2 、AgGaS 2 、CuGaS 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 and mixtures thereof; or quaternary compounds such as AgInGaS 2 and CuInGaS 2 wait.

[0170] The III-V group compound can be selected from: binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof; and quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof. In one embodiment, the III-V group compound can also contain a II group metal. For example, InZnP etc. can be selected as the III-II-V group compound.

[0171] The IV-VI Group compounds can be selected from the group consisting of: binary compounds such as SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and quaternary compounds such as SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof.

[0172] Examples of II-IV-V semiconductor compounds may include ternary compounds such as ZnSnP, ZnSnP 2 、ZnSnAs 2 、ZnGeP 2 、ZnGeAs 2 、CdSnP 2 and CdGeP 2 and mixtures thereof.

[0173] 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 such as SiC, SiGe, and mixtures thereof.

[0174] 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 in a uniform or non-uniform concentration. In other words, the formula indicating the quantum dot refers to the type of element contained in the quantum dot compound, and the ratio of the elements in the compound may be different. For example, AgInGaS 2 Can be described as AgIn x Ga 1-x S 2 (x is a real number between 0 and 1).

[0175] In this regard, the binary, ternary or quaternary compounds may be present in a particle at a uniform concentration, or may be present in the same particle at partially different concentration distributions. Quantum dots may have a core-shell structure, in which one quantum dot surrounds another quantum dot. In a core-shell structure, there may be a concentration gradient, in which the concentration of the element present in the shell decreases toward the core.

[0176] In some embodiments, the quantum dot may have a core-shell structure including a core comprising the above-mentioned nanocrystal and a shell surrounding the core. The shell of the quantum dot may be used as a protective layer to maintain the semiconductor properties by preventing the chemical denaturation of the core, and / or as a charging layer to give the quantum dot electrophoretic properties. The shell may have a single layer or a multilayer structure. Examples of the shell of the quantum dot may include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0177] For example, metal or non-metal oxides can be binary compounds such as 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 and NiO; or ternary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and CoMn 2 O 4 , but the present disclosure is not limited thereto.

[0178] Examples of semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb, etc., but the present disclosure is not limited thereto.

[0179] The quantum dot may have a full width at half maximum (FWHM) of a light emitting wavelength spectrum equal to or less than about 45 nm. For example, the quantum dot may have a full width at half maximum (FWHM) of a light emitting wavelength spectrum equal to or less than about 40 nm. For example, the quantum dot may have a full width at half maximum (FWHM) of a light emitting wavelength spectrum equal to or less than about 30 nm. Within such a range, color purity or color reproducibility may be improved. Because the light emitted by such a quantum dot is emitted in all directions, the optical viewing angle may be improved.

[0180] The shape of the quantum dots may not be particularly limited to shapes generally used in the art, but may have shapes such as spherical, pyramidal, multi-arm or cubic nanoparticles, nanotube particles, nanowire particles, nanofiber particles, and nanoplate particles.

[0181] The energy band gap of the quantum dots can be adjusted by adjusting the size of the quantum dots or the ratio of elements in the quantum dot compound, so that light with various wavelength ranges can be obtained from the layer containing the quantum dots. Therefore, the quantum dots described above (quantum dots of different sizes or with different element ratios in the quantum dot compound) can be used to realize a light control part that emits light of various wavelengths.

[0182] Reference again Figure 5 and Figure 6 , the light control layer CCL may include a third light control part CCP-B corresponding to the third pixel area PXA-B. The third light control part CCP-B may be a part that transmits and emits the source light provided from the display layer DP-ED. The third light control part CCP-B may include a base resin BR and a scatterer SP dispersed in the base resin BR. The third light control part CCP-B may not include quantum dots. However, the present disclosure is not limited thereto, and the third light control part CCP-B may include quantum dots that convert the wavelength of a portion of the source light provided from the display layer DP-ED and emit blue light.

[0183] In the light control layer CCL according to one embodiment, the third light control part CCP-B may include a spherical scatterer SP. The spherical scatterer SP may uniformly scatter, transmit, and emit light incident on the third light control part CCP-B. The spherical scatterer SP may have a spherical shape with a diameter of several hundred nanometers. For example, in one embodiment, the diameter of the spherical scatterer SP may be about 200 nm.

[0184] The spherical scatterers SP may be inorganic particles. For example, the spherical scatterers SP may include TiO 2 、ZnO、Al 2 O 3 and SiO 2 The spherical scatterer SP may include TiO 2 、ZnO、Al 2 O 3 and SiO 2 (such as hollow silica), or may be selected from TiO 2 、ZnO、Al 2 O 3 and SiO 2 A mixture of two or more of (such as hollow silica).

[0185] 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 BR can be a medium in which quantum dots QD-R and QD-G, plate-like scatterers MSP or spherical scatterers SP are dispersed. The matrix resin BR can be made of a resin composition that can be generally referred to as an adhesive. For example, the matrix resin BR can be an acrylate resin, a polyurethane resin, a siloxane resin or an epoxy resin. The matrix resin BR respectively contained in each of 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 BR in at least one light control part can be different from the matrix resin BR in the remaining light control parts.

[0186] In one embodiment, the plate-like scatterer MSP may not be agglomerated with each other in each of the first light control part CCP-R and the second light control part CCP-G, but may be uniformly dispersed in the base resin BR. Therefore, the plate-like scatterer MSP may uniformly disperse the source light provided from the display layer DP-ED to the light control layer CCL in each of the light control parts CCP-R and CCP-G. Because the thickness of the plate-like scatterer MSP is small, the light transmitted without being used for optical conversion can be emitted through the light control parts QD-R and QD-G with minimal light loss. For example, in the case where the light-emitting element ED generates light in the blue wavelength range and light in the green wavelength range and provides the generated light to the second light control part CCP-G, the light in the blue wavelength range can be transmitted to the second quantum dot QD-G, and the second quantum dot QD-G can allow green light to be emitted, and the light in the green wavelength range can be transmitted through the plate-like scatterer MSP and emitted from the second light control part CCP-G. Therefore, as the transmittance of the source light is improved, the light control layer CCL in one embodiment can exhibit high brightness.

[0187] The light control layer CCL may be formed via inkjet printing. For example, each of the first light control part CCP-R, the second light control part CCP-G, and the third light control part CCP-B may be formed via a curing process after supplying the corresponding light control part composition via the nozzle of the inkjet printing device. The plate-like scatterer MSP according to one embodiment may be provided in a uniformly dispersed state without agglomeration in the light control part composition. The method for forming the light control layer CCL is not limited thereto.

[0188] The light control layer CCL in one embodiment can exhibit high brightness. A display device DD including the light control layer CCL in one embodiment can exhibit excellent front brightness, and can also exhibit excellent color quality due to the high optical conversion efficiency of the quantum dots QD-R and QD-G in the light control layer CCL. For example, a display device DD in one embodiment including a plate-like scatterer MSP according to one embodiment in a light control panel OP can exhibit excellent display quality based on improved brightness and color characteristics.

[0189] Figure 8 is a schematic cross-sectional view showing a light control layer according to an embodiment. Figure 8 The light control layer CCL-a in one embodiment shown in FIG. 1 may include a plate-like scatterer MSP in the third light control portion CCP-Ba, which is Figure 6 For example, the light control layer CCL-a in one embodiment may include a plate-like scatterer MSP in all of the first light control part CCP-R, the second light control part CCP-G, and the third light control part CCP-Ba.

[0190] The first light control part CCP-R, the second light control part CCP-G and the third light control part CCP-Ba including the plate-shaped scatterer MSP can scatter the light from the display layer DP-ED ( Figure 5 ), and the source light may pass through the plate-like scatterer MSP and be emitted from the light control parts CCP-R, CCP-G, and CCP-Ba, thereby obtaining a higher light transmittance than an embodiment using a scatterer other than the plate-like scatterer. Specifically, the light control layer CCL-a according to one embodiment may not include quantum dots, and may exhibit a characteristic of improved light transmittance in a forward direction as a third direction DR3 in the third light control part CCP-Ba including the plate-like scatterer MSP.

[0191] Fig. 9A is a schematic diagram illustrating an emission pattern of light from a spherical scatterer according to an embodiment. Fig. 9B is a schematic diagram showing a light emission pattern of a plate-like scatterer according to an embodiment. Fig. 9A Light control properties in a spherical diffuser according to an embodiment are shown. Fig. 9B The light control characteristics in the plate-like diffuser according to the embodiment are shown.

[0192] In the case where the source light SC is provided to the spherical scatterer SP, a portion of the provided light may become reflected or scattered light R SC', another part of the provided light may pass through the spherical scatterer SP, yet another part of the provided light may be absorbed by the spherical scatterer SP, and only the remaining part of the provided light may be transmitted and become the transmitted light T SC In a plate-like scatterer MSP according to an embodiment, a portion of the provided source light SC may become reflected or scattered light R SC , another part of the provided source light SC can pass through the plate-like scatterer MSP, and a part of the light that passes through the plate-like scatterer MSP can become the transmitted light T SC .

[0193] Since the plate-shaped scatterer MSP according to one embodiment has a small thickness equal to or less than about 50 nm, the transmitted light T SC 'The ratio of the transmitted and emitted light T that is not absorbed is compared SC Therefore, in the optical functional layer including the plate-like scatterer MSP, the optical loss of received light can be minimized, thereby improving the optical efficiency and transmittance.

[0194] For example, in the display layer DP-ED ( Figure 5 ) is emitted in the third direction DR3 as the thickness direction DR3, in a display device DD ( Figure 5 ), the plate-like scatterer MSP is included in the light control panel OP ( Figure 5 ) in the case of the light control panel OP ( Figure 5 ) will be improved. Even in the case where the surface with a large width of the plate-like scatterer MSP is arranged in a direction parallel to the third direction DR3, the source light SC can be transmitted between the plate-like scatterers MSP due to the small thickness of the plate-like scatterers MSP. Because the plate-like scatterers MSP do not interfere with the optical path of the source light SC in the forward direction (for example, the third direction DR3), the light control panel OP ( Figure 5 ) in the front brightness.

[0195] Fig.10 is a graph showing optical characteristics of source light based on wavelength according to an embodiment. Fig.10 The display layer DP-ED ( Figure 5 ) provides the spectrum of the source light. Fig.10 A spectrum of light output intensity based on wavelength is shown.

[0196] refer to Fig.10, 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. For example, from the display layer DP-ED (see 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 CCL (see Figure 5 ), or may be provided to the quantum dots included in the light control layer CCL, and may emit light having a converted wavelength. Light in the green wavelength range may also pass through the light control layer CCL, or may be provided to the quantum dots included in the light control layer CCL, and may emit light having a converted wavelength.

[0197] On the other hand, source light in the wavelength range including green is supplied to the green light control portion CCP-G (see Figure 5 ) in the case of light passing through the green light control part CCP-G ( Figure 5 )emission.

[0198] For example, a display device according to one embodiment may include a light control portion including a plate-like scatterer in the main traveling direction of source light provided from the display layer to the light control layer to increase the amount of light emitted in the forward direction through the light control portion, thereby improving the brightness of the display device. Specifically, in a case where the display device in one embodiment includes a display layer that provides source light including both blue light and green light and a light control layer disposed on the display layer, at least the green light control portion may include a plate-like scatterer, thereby increasing the amount of green light that passes through the green light control portion and is emitted. Therefore, the optical efficiency of the green pixel area can be improved, and thus the display quality of the display device can also be improved.

[0199] Fig.11A and Fig. 11B The results of evaluating the characteristics of the light control portions in the comparative example and the example are shown. Fig.11A and Fig. 11B is a graph showing optical characteristics based on wavelength in a comparative example and an example. Fig.11A The light output characteristics of the blue light control portion in the comparative example and the example are shown, and Fig. 11B The light output characteristics of the green light control section in the comparative example and the example are shown. Fig.11A and Fig. 11B In the comparative example, TiO 2 Spherical scatterers, while in the example Mg 2 Al(OH) 7 Plate scatterer. Use Fig.10 The light with the light output spectrum shown in is used as the source light to evaluate the brightness of the light control portion.

[0200] exist Fig.11A In the comparative example, the blue light control part is formed by using a spherical scatterer in an amount of 6 wt% of the total weight of the light control part, while the example is formed by using a plate-like scatterer in an amount of 6 wt% of the total weight of the light control part. Fig. 11B In the embodiment, the comparison example is a green light control part formed by using spherical scatterers in an amount of 6 wt % of the total weight of the light control part and green quantum dots in an amount of 40 wt % of the total weight of the light control part, while the example is a green light control part formed by using plate-like scatterers in an amount of 6 wt % of the total weight of the light control part and green quantum dots in an amount of 40 wt % of the total weight of the light control part.

[0201] Fig.11A and Fig. 11B The intensity of light output from the light control part in the comparative example and the example, such as the front brightness, is shown. Fig.11A In the case of an example in which the blue light control portion includes a plate-shaped scatterer, the brightness is improved by 3% or more at the maximum light emission wavelength compared to a comparative example in which a spherical scatterer is included. Fig. 11B , in the case of an example in which the green light control portion includes a plate-shaped scatterer, the brightness is improved by 13% or more at the maximum light emission wavelength compared to a comparative example in which a spherical scatterer is included.

[0202] In other words, it can be seen that the light control portion including the plate-shaped scatterers exhibits improved brightness compared to the light control portion including the spherical scatterers.

[0203] refer to Fig.11A and Fig. 11B , it can be seen that the brightness improvement effect is greater in the green light control section than in the blue light control section. This is considered to be because the source light contains both blue light and green light, and therefore, in the source light provided to the green light control section, the proportion of green light emitted by the green light control section that is not light-converted increases.

[0204] For example, in the case where a display device according to one embodiment includes light in a green light wavelength range as source light in addition to blue light, in the case where at least the green light control portion includes a plate-like scatterer, the brightness of the display device can be improved. In the case where the plate-like scatterer is additionally included in the red light control portion, the light that has passed through the red light control portion without being absorbed at the plate-like scatterer can be increased, and therefore, the proportion of green light in the source light provided to the red quantum dots can be increased, thereby improving the light conversion efficiency of the light control layer. In the case where the plate-like scatterer is additionally included in the blue light control portion, the amount of light that has passed through the blue light control portion without being absorbed at the plate-like scatterer can be increased, thereby also improving the transmittance of the blue light control portion. Therefore, in the case where at least one of the light control portions that are distinguished from each other includes a plate-like scatterer, the display device in one embodiment can exhibit improved brightness and excellent display quality.

[0205] Fig.12 is a schematic cross-sectional view of a display device according to an embodiment. Fig.12 In the description of the display device DD-1 in one embodiment shown in FIG. 1 , the description will not be repeated with reference to FIG. Figures 1 to 11B The content described is repeated, and the differences will be described.

[0206] The display device DD-1 in one embodiment may include a display panel DP-1 and a light control panel OP-1 disposed on the display panel DP-1. The display panel DP-1 may emit source light provided to the light control panel OP-1.

[0207] The display panel DP-1 may include a base layer BS, a circuit layer DP-CL, and a display layer DP-ED1. The base layer BS may be a base member on which the circuit layer DP-CL and the display layer DP-ED1 are disposed. The circuit layer DP-CL may include a circuit element for driving the display layer DP-ED1. The source light may be emitted from the display layer DP-ED1. As described above, the display device DD( Figure 5 ), the display layer DP-ED1 may include an organic electroluminescent element ED( Figure 5 In one embodiment, the display panel DP-1 may be an organic light emitting display panel.

[0208] In an embodiment, the display panel DP-1 may be a liquid crystal display panel, a micro LED display panel, a nano LED display panel, a quantum dot light emitting display panel, etc. The liquid crystal display panel may include a liquid crystal element in the display layer DP-ED1, the micro LED display panel may include a micro light emitting diode element as an ultra-small light emitting element in the display layer DP-ED1, the nano LED display panel may include a nano light emitting diode element in the display layer DP-ED1, and the quantum dot light emitting display panel may include a light emitting element including quantum dots in the light emitting layer. However, the types of display panels presented are examples, and any type of display panel may be used without limitation, as long as the display panel DP-1 includes a display layer DP-ED1 that can provide source light.

[0209] For example, in one embodiment of the display device DD-1, the display panel DP-1 may include a display element that emits white light. The source light of the white light generated from the display panel DP-1 may be transmitted to the light control panel OP-1 and may be controlled in the light control panel OP-1 as light outputs corresponding to the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B, respectively.

[0210] In one embodiment, the light control panel OP-1 may include a scattering layer SCL. The scattering layer SCL may include a plate-shaped scatterer MSP according to one embodiment. In one embodiment, the scattering layer SCL may be a single common layer and may overlap with all of the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B and the peripheral area NPXA in the thickness direction DR3. However, the present disclosure is not limited thereto, and the scattering layer SCL may be divided into portions corresponding to the first pixel area PXA-R, the second pixel area PXA-G, and the third pixel area PXA-B, respectively.

[0211] The scattering layer SCL may include a plate-like scatterer MSP having a thickness significantly smaller than the width of the surface, thereby transmitting the source light while minimizing the light loss of the source light emitted from the display layer DP-ED1. The plate-like scatterer MSP included in the scattering layer SCL may be made of a layered double hydroxide, and due to the charges included on the surface, the plate-like scatterer MSP may be uniformly dispersed in the scattering layer SCL without agglomerating with each other, so that the source light may be uniformly dispersed and provided to the optical functional layer on top of the scattering layer SCL.

[0212] Therefore, the display device DD-1 in one embodiment including the scattering layer SCL including the plate-shaped scatterer MSP according to one embodiment may exhibit improved brightness.

[0213] The light control panel OP-1 of the display device DD-1 in one embodiment may further include a color filter layer CFL. The color filter layer CFL may include one or more color filters CF1, CF2, and CF3. In one embodiment, the first color filter CF1 may be a red color filter that transmits red light, the second color filter CF2 may be a green color filter that transmits green light, and the third color filter CF3 may be a blue color filter that transmits blue light. The color filter layer CFL may be disposed on the scattering layer SCL. In an embodiment, the color filter layer CFL may further include a low refractive index layer LR. The low refractive index layer LR may be disposed below the color filters CF1, CF2, and CF3.

[0214] refer to Fig.12 , the scattering layer SCL may be disposed between the display layer DP-ED1 and the color filter layer CFL. In one embodiment, the scattering layer SCL may be disposed below the low refractive index layer LR. However, the present disclosure is not limited thereto. In another embodiment, the low refractive index layer LR may be omitted, and the scattering layer SCL may be disposed directly below the color filters CF1, CF2, and CF3. In one embodiment, each of the color filters CF1, CF2, and CF3 may include a plate-shaped scatterer MSP.

[0215] In one embodiment, the light control panel OP-1 of the display device DD-1 may include a light control layer disposed between the display layer DP-ED1 and the scattering layer SCL or between the scattering layer SCL and the color filter layer CFL and including quantum dots.

[0216] A display device in one embodiment may include a light control panel including a plate-like scatterer, thereby exhibiting excellent display quality due to high light transmittance and excellent dispersion characteristics of the plate-like scatterer. A display device in one embodiment may exhibit improved brightness and excellent color characteristics by including a plate-like scatterer made of a layered double hydroxide in at least one of the light control parts provided on the display layer.

[0217] The display device in the embodiment may exhibit improved brightness by increasing transmittance and scattering of source light through the plate-like scatterer including the nanoplate-shaped layered double hydroxide.

[0218] The above description is an example of the technical features of the present disclosure, and those skilled in the art to which the present disclosure belongs will be able to make various modifications and changes.Therefore, the above embodiments of the present disclosure can be implemented individually or in combination with each other.

[0219] Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical spirit of the present disclosure, but to describe the technical spirit of the present disclosure, and the scope of the technical spirit of the present disclosure is not limited by these embodiments. The protection scope of the present disclosure should be interpreted by the attached claims, and all technical spirits within the equivalent scope should be interpreted as included in the scope of the present disclosure.

Claims

1. A display device, wherein: The display device comprises: A display layer providing source light; and a light control layer disposed on the display layer and including a plurality of light control parts distinguished from each other, Among them, at least one of the plurality of light control parts includes quantum dots that convert the wavelength of the source light and a plate-like scatterer made of layered double hydroxide.

2. The display device according to claim 1, wherein: The plate-shaped scatterer has a ratio of the maximum width of the surface to the thickness in the range of 2:1 to 10:

1.

3. The display device according to claim 2, wherein: The maximum width is in the range of 5 nm to 300 nm, and The thickness is in the range of 1 nm to 50 nm.

4. The display device according to claim 1, wherein: The layered double hydroxide is represented by the following Formula 1: Formula 1 M 2+ X M 3+ Y (OH) (2X+3Y) In formula 1, M 2+ is Zn, Co, Mg, Mn, Ni or Fe, M 3+ is Fe, Co, Ni, Al, Ga or In, and X and Y are independent of each other and greater than 0.

5. The display device according to claim 1, wherein: The amount of the plate-shaped scatterer is in the range of 0.1 wt % to 20 wt % based on 100 wt % of the total weight of the plurality of light-controlling parts including the plate-shaped scatterer.

6. The display device according to claim 1, wherein: The plurality of light control parts include: A red light control part, which emits red light and includes a first quantum dot and the plate-like scatterer; a green light control part that emits green light and includes a second quantum dot and the plate-like scatterer; and The blue light control part transmits the source light.

7. The display device according to claim 6, wherein: The blue light controlling portion includes a spherical scatterer.

8. The display device according to claim 6, wherein: The blue light controlling portion includes the plate-shaped diffuser.

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

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

11. A display device, wherein: The display device comprises: A display panel providing source light; and The light control panel is disposed on the display panel and includes an optical scattering layer including a plate-shaped scatterer made of layered double hydroxide.

12. The display device according to claim 11, wherein: The plate-like scatterer has a ratio of the maximum width of the surface to the thickness in the range of 2:1 to 10:1, The maximum width is in the range of 5 nm to 300 nm, and The thickness is in the range of 1 nm to 50 nm.

13. The display device according to claim 11, wherein: The plate-like scatterer is represented by the following formula 1: Formula 1 M 2+ X M 3+ Y (OH) (2X+3Y) In formula 1, M 2+ is Zn, Co, Mg, Mn, Ni or Fe, M 3+ is Fe, Co, Ni, Al, Ga or In, and X and Y are independent of each other and greater than 0.

14. The display device according to claim 11, wherein: The light control panel further includes a color filter layer disposed on the optical scattering layer and including a red filter, a green filter, and a blue filter, and The source light is white light.

15. A display device, wherein: The display device is divided into a first pixel area emitting red light, a second pixel area emitting green light, and a third pixel area emitting blue light on a plane, and the display device includes: A display panel including a light emitting element; and A light control panel includes a first light control part corresponding to the first pixel area, a second light control part corresponding to the second pixel area, and a third light control part corresponding to the third pixel area, wherein: The light control panel is arranged on the display panel, The first light control part includes a first quantum dot and a plate-like scatterer, The second light control portion includes a second quantum dot and the plate-like scatterer, and The plate-like scatterer is made of layered double hydroxide.

16. The display device according to claim 15, wherein: The plate-like scatterer has a ratio of the maximum width of the surface to the thickness in the range of 2:1 to 10:1, The maximum width is in the range of 5 nm to 300 nm, and The thickness is in the range of 1 nm to 50 nm.

17. The display device according to claim 15, wherein: The plate-like scatterer is represented by the following formula 1: Formula 1 M 2+ X M 3+ Y (OH) (2X+3Y) In formula 1, M 2+ is Zn, Co, Mg, Mn, Ni or Fe, M 3+ is Fe, Co, Ni, Al, Ga or In, and X and Y are independent of each other and greater than 0.

18. The display device according to claim 15, wherein: The third light-controlling portion includes a spherical diffuser and does not include the plate-shaped diffuser.

19. The display device according to claim 15, wherein: The light emitting element emits source light including blue light and green light.

20. The display device according to claim 15, wherein: The light control panel further includes a color filter layer that is spaced apart from the display panel and is disposed on the first light control part, the second light control part, and the third light control part, and The color filter layer may include a first color filter disposed to correspond to the first pixel area and transmit red light, a second color filter disposed to correspond to the second pixel area and transmit green light, and a third color filter disposed to correspond to the third pixel area and transmit blue light.

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