Display device

Abstract

A display device is disclosed. The display device includes: a display panel including a light-emitting element to provide a first light; a light control layer disposed on the display panel; and a color correction layer disposed on the light control layer, wherein the color correction layer includes an organic dye and a metal compound comprising at least one dithiol olefin moiety, the maximum absorption wavelength of the organic dye being about 580 nm to about 600 nm, and the maximum absorption wavelength of the metal compound being about 700 nm or greater.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2020-0107503, filed on August 26, 2020, which is incorporated herein by reference for all purposes, as fully set forth herein. Technical Field

[0002] The embodiments of the invention generally relate to a display device, and more specifically, to a display device with an improved color gamut. Background Technology

[0003] Various display devices have been developed for use in multimedia devices such as televisions, mobile phones, tablet computers, and game consoles. These display devices can include various optical functional layers to provide users with high-quality color images.

[0004] Recently, various forms of display devices have been developed, such as display devices with curved surfaces, rollable display devices, or foldable display devices.

[0005] The information disclosed in this background section is only for understanding the background of the inventive concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0006] With the introduction of curved, rollable, and flexible display devices, the applicant recognized the need for thinner display devices with improved color gamut.

[0007] The display device constructed according to the principles of the invention and exemplary embodiments has improved color gamut and reliability.

[0008] For example, a color correction layer included in a display device constructed according to the principles and embodiments of the invention may include organic dyes and dithiol-based metal compounds. The color correction layer may include organic dyes having a maximum absorption wavelength range longer than the peak wavelength of green light and shorter than the peak wavelength of red light to improve the color gamut of the display device. The color correction layer may include dithiol-based metal compounds as light stabilizers, so that the improved color gamut effect is maintained even when the display device is exposed to light for extended periods. Furthermore, the maximum absorption wavelength range of the dithiol-based metal compounds may be located in the near-infrared region, which is a wavelength longer than the peak wavelength of red light; therefore, the dithiol-based metal compounds can act as light stabilizers without affecting light absorption in the visible light region. That is, the dithiol-based metal compounds may not reduce the color gamut of the image provided by the display device.

[0009] Additional features of the inventive concept will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice of the inventive concept.

[0010] According to one aspect of the invention, the display device includes: a display panel including a light-emitting element to provide first light; a light control layer disposed on the display panel; and a color correction layer disposed on the light control layer, wherein the color correction layer includes an organic dye and a metal compound comprising at least one dithiol olefin moiety, the organic dye having a maximum absorption wavelength of about 580 nm to about 600 nm, and the metal compound having a maximum absorption wavelength of about 700 nm or greater.

[0011] The maximum absorption wavelength range of organic dyes does not have to overlap with that of metal compounds.

[0012] The transmittance of the color correction layer at wavelengths from about 580 nm to about 600 nm can be about 0.6 or less.

[0013] The molar extinction coefficient of organic dyes at the maximum absorption wavelength can be approximately 10,000 M. -1 cm -1 Or larger.

[0014] In the color correction layer, the content of metal compounds, including dithiolene metal compounds, can be lower than the content of organic dyes.

[0015] Based on the total weight of the color correction layer, organic dyes may be included in an amount from about 0.1 wt% to about 10 wt%.

[0016] Based on the total weight of the color correction layer, the metal compound may be included in an amount from about 0.1 wt% to about 5 wt%.

[0017] Organic dyes may include at least one compound containing a squaric acid cyanine moiety.

[0018] Metal compounds may include at least one bis(dithiobenzyl)nickel compound.

[0019] Light-emitting elements can include organic light-emitting elements, nano light-emitting elements, or quantum dot light-emitting elements.

[0020] The light control layer may include: a first light control unit, including a first quantum dot to convert first light into second light with a different wavelength range; a second light control unit, including a second quantum dot to convert the first light into third light with a different wavelength range; and a transmission unit to transmit the first light.

[0021] The display device may further include a scatterer in at least one of the first light control unit, the second light control unit, and the transmission unit.

[0022] Display panels may include flexible display panels.

[0023] According to another aspect of the invention, the display device includes: a light-emitting element layer providing blue light; a light control layer disposed on the light-emitting element layer; and a color correction layer disposed on the light control layer, wherein the light control layer includes: a first light control portion including a first quantum dot to convert blue light into green light; a second light control portion including a second quantum dot to convert blue light into red light; and a transmissive portion transmitting blue light, and the color correction layer includes an organic dye and a metal compound comprising at least one dithiol olefin moiety, wherein the maximum absorption wavelength of the organic dye is longer than the peak wavelength of green light, and the maximum absorption wavelength of the metal compound is longer than the peak wavelength of red light.

[0024] The maximum absorption wavelength range of organic dyes does not have to overlap with that of metal compounds.

[0025] The maximum absorption wavelength of organic dyes can be longer than the peak wavelength of green light but shorter than the peak wavelength of red light.

[0026] The molar extinction coefficient of organic dyes at the maximum absorption wavelength can be approximately 10,000 M. -1 cm -1 Or larger.

[0027] In the color correction layer, the content of metal compounds can be about 50% or less of the content of organic dyes.

[0028] Based on the total weight of the color correction layer, organic dyes may be included in an amount of about 0.1 wt% to about 10 wt%, and metal compounds may be included in an amount of about 0.1 wt% to about 5 wt%.

[0029] Organic dyes may include at least one squaric acid cyanide compound, and metal compounds may include at least one bis(dithiobenzyl)nickel compound.

[0030] It will be understood that the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the invention as claimed. Attached Figure Description

[0031] The accompanying drawings illustrate illustrative embodiments of the invention and, together with the description, serve to explain the inventive concept. The drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification.

[0032] Figure 1 This is a perspective view showing an embodiment of a display device constructed according to the principles of the invention.

[0033] Figure 2 yes Figure 1 An exploded perspective view of the display device.

[0034] Figure 3 yes Figure 1 A plan view of the display device.

[0035] Figure 4 It is along Figure 3 A cross-sectional view of the display device taken by line I-I'.

[0036] Figure 5 The transmittance of the color correction layer, constructed according to the principle of the invention, is depicted graphically based on the wavelength.

[0037] Figure 6A This is a graphical representation of the absorbance of the color correction layer in the comparison example, based on wavelength.

[0038] Figure 6B The absorbance of a color correction layer constructed according to the principles of the invention is graphically depicted based on wavelength.

[0039] Figure 7 It is based on the information Figure 4 The normalized intensity of light is graphically depicted according to wavelength, illustrating the exemplary and comparative examples of the principles of the invention. Detailed Implementation

[0040] In the following description, numerous specific details are set forth for illustrative purposes to provide a thorough understanding of various embodiments or implementations of the invention. As used herein, “embodiment” and “implementation” are interchangeable terms as non-limiting examples of apparatuses or methods employing one or more inventive concepts disclosed herein. However, it will be apparent that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, the various embodiments may differ, but are not necessarily exclusive. For example, a particular shape, construction, and characteristic of an embodiment may be used or implemented in another embodiment without departing from the inventive concept.

[0041] Unless otherwise stated, the embodiments shown are to be understood as exemplary features providing different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, portions, regions and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0042] Crosshairs and / or shading are typically used in accompanying drawings to clarify the boundaries between adjacent elements. Thus, unless explicitly stated otherwise, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, scale, commonalities between the elements shown, or any other characteristics, properties, etc. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. When embodiments can be implemented differently, a particular process sequence may be performed in a sequence different from that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Moreover, the same reference numerals denote the same elements.

[0043] When a component or layer is referred to as being "on," "connected to," or "bonded to" another component or layer, the component or layer may be directly on, directly connected to, or directly bonded to the other component or layer, or there may be intermediate components or layers present. However, when a component or layer is referred to as being "directly on," "directly connected to," or "directly bonded to" another component or layer, there are no intermediate components or layers present. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection, with or without intermediate components. Furthermore, the DR1, DR2, and DR3 axes are not limited to the three axes of a Cartesian coordinate system such as the x, y, and z axes, but can be interpreted in a broader sense. For example, the DR1, DR2, and DR3 axes can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0044] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the publicly stated teachings, the first element discussed below may be referred to as the second element.

[0045] Spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein for descriptive purposes to describe the relationship of one element to another (or other elements) as shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features would then be positioned “above” said other elements or features. Thus, the term “below” can cover both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein shall be interpreted accordingly.

[0046] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are also intended to include the plural forms. Furthermore, the terms “comprising,” “including,” and / or variations thereof, when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, components, parts, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, parts, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and thus are used to explain the inherent deviations in measurements, calculated values, and / or provided values ​​that will be recognized by those skilled in the art.

[0047] Various embodiments are described herein with reference to sectional views and / or exploded views, which are schematic diagrams of idealized embodiments and / or intermediate structures. Thus, variations in the illustrated shapes, for example, due to manufacturing techniques and / or tolerances, will be expected. Therefore, the embodiments disclosed herein should not be necessarily interpreted as limited to the specific shapes shown, but will include deviations in shape caused, for example, by manufacturing processes. In this way, the areas shown in the drawings can be schematic in nature, and the shapes of these areas may not reflect the actual shapes of the areas of the device, and are thus not intended to be limiting.

[0048] The terms "metal" and "nickel" refer to their respective atoms and corresponding free radicals.

[0049] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure is a part. Terms (such as those defined in general dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0050] Figure 1 This is a perspective view showing an embodiment of a display device constructed according to the principles of the invention. Figure 1 A portable electronic device DD is illustrated by way of example. However, the display device DD can be used in large electronic devices such as televisions, monitors, or billboards, as well as in small and medium-sized electronic devices such as personal computers, laptops, personal digital assistants, car navigation units, game consoles, smartphones, tablets, and cameras. Moreover, these are presented by way of example only, and the display device DD can be applied to or used in other electronic devices.

[0051] The display device DD may have a generally hexahedral shape, which has a thickness in the direction of a third directional axis DR3 on a plane defined by a first directional axis DR1 and a second directional axis DR2 that intersect each other. However, this is shown by way of example. The display device DD may have various shapes and is not limited to any of the specific shapes or embodiments disclosed herein.

[0052] In an embodiment, the upper (or front) surface and lower (or rear) surface of each component are defined based on the direction along which the displayed image IM is directed. The upper and lower surfaces may be opposite each other in the direction of the third-party axis DR3, and the normal direction of each of the upper and lower surfaces may be substantially parallel to the direction of the third-party axis DR3.

[0053] The directions indicated by the first direction axis to the third direction axes DR1, DR2, and DR3 are relative concepts and can be converted into different directions. In the following text, the first direction to the third direction refers to the same reference numerals as those indicating the directions indicated by the first direction axis to the third direction axes DR1, DR2, and DR3.

[0054] The display device DD can display an image IM via a display surface IS. The display surface IS includes a display area DA in which the image IM is displayed and a non-display area NDA adjacent to the display area DA. The non-display area NDA is the area in which no image is displayed. The image IM can be a moving image or a static image. Figure 1 Several application icons, clocks, etc., are shown as examples of image-based IM.

[0055] The display area DA can have a generally rectangular shape. The non-display area NDA can surround the display area DA. However, this is shown by way of example, and the shapes of the display area DA and the non-display area NDA can be designed in other ways relative to each other. In addition, the non-display area NDA may not be present on the front surface of the display device DD.

[0056] The display device DD can be flexible. This means that it has the property of being able to bend, and it can include all structures from those that can be completely folded to those that can be bent into structures on the order of several nanometers. For example, the display device DD can be a generally bent display device or a foldable display device. However, the embodiments are not limited to this, and the display device DD can also be rigid.

[0057] Figure 2 yes Figure 1 An exploded perspective view of the display device. (Refer to...) Figure 2 The display device DD may include a display panel DP, a light control layer WCL, and a color correction layer CRL stacked sequentially along the third direction DR3.

[0058] The display panel DP can include multiple pixels in the area corresponding to the display area DA of the display device DD. These multiple pixels can correspond to multiple light-emitting areas PXA-R, PXA-B, and PXA-G (see reference). Figure 3 (Corresponding to this). Multiple pixels can display light based on electrical signals. Using multiple pixels, the display area DA can display an image IM generated by light.

[0059] Display panel DP can be a light-emitting display panel. For example, display panel DP can be a liquid crystal display panel, a micro LED display panel, a nano LED display panel, an organic light-emitting display panel, or a quantum dot light-emitting display panel. However, display panel DP is not limited to the above examples.

[0060] The emitting layer of an organic light-emitting display panel may include organic light-emitting materials. The emitting layer of a quantum dot light-emitting display panel may include quantum dots and / or quantum rods, etc. A micro-LED display panel may include micro-light-emitting diode elements as ultra-small light-emitting elements, and a nano-LED display panel may include nano-light-emitting diode elements. In the following, the display panel DP is described as an organic light-emitting display panel.

[0061] The light control layer (WCL) can be placed on the display panel (DP). The WCL can transmit light output from the display panel (DP) or convert it into light of different wavelengths to output various colors of light.

[0062] A color correction layer (CRL) can be placed on the light control layer (WCL). The CRL corrects the colors of various types of light output from the WCL. Light passing through the CRL has an improved color gamut, providing users with clear and natural colors. Additionally, the CRL can cover the front surface of both the display panel (DP) and the WCL to protect them.

[0063] The display device DD may also include an auxiliary light control layer between the light control layer WCL and the color correction layer CRL. The auxiliary light control layer can reflect some of the light transmitted through the light control layer WCL back to the light control layer WCL. Depending on the display area DA, a portion of the light output from the display panel DP needs to be converted to light with a wavelength range different from the output light's wavelength range (hereinafter also referred to as the "wavelength region"). However, there may be light whose wavelength range is not converted while passing through the light control layer WCL. The auxiliary light control layer can return this light to the light control layer WCL, thereby increasing the light conversion efficiency of the light control layer WCL. For example, the auxiliary light control layer may include a material with a low refractive index or a transmissive / reflective material to reflect light that has already passed through the light control layer WCL back to the light control layer WCL.

[0064] Figure 3 yes Figure 1 A plan view of the display device. (Refer to...) Figure 3 The display device DD may include a non-light-emitting area NPXA and light-emitting areas PXA-R, PXA-G, and PXA-B. Each of the light-emitting areas PXA-R, PXA-G, and PXA-B may be an area in which light is emitted from a light-emitting element OEL (see reference). Figure 4 Each region of light produced in )

[0065] When viewed in a plane, the emitting regions PXA-R, PXA-G, and PXA-B can be separated from each other. Each of the emitting regions PXA-R, PXA-G, and PXA-B can be defined by a pixel-defined layer (PDL) (see reference). Figure 4 The non-emitting region NPXA can be the region located between adjacent emitting regions PXA-R, PXA-G, and PXA-B, and can be the region defined by the pixel definition layer PDL (see reference). Figure 4 The corresponding area. The non-emitting area NPXA can set the boundary between the emitting areas PXA-R, PXA-G and PXA-B to prevent the color mixing of light emitted from the emitting areas PXA-R, PXA-G and PXA-B.

[0066] The light-emitting areas PXA-R, PXA-G, and PXA-B can be divided into multiple groups based on the color of the light emitted onto the display device DD. Figure 3The display device DD shown in the illustration illustrates three light-emitting regions that emit red, green, and blue light, respectively. For example, the display device DD may include a first light-emitting region PXA-R that emits red light, a second light-emitting region PXA-G that emits green light, and a third light-emitting region PXA-B that emits blue light.

[0067] The light-emitting areas PXA-R, PXA-G, and PXA-B in the display device DD can be arranged in a roughly elongated (strip) shape. (Refer to...) Figure 3 Multiple first emitting regions PXA-R emitting red light, multiple second emitting regions PXA-G emitting green light, and multiple third emitting regions PXA-B emitting blue light can be aligned along the second direction DR2. Furthermore, the first emitting regions PXA-R, the second emitting regions PXA-G, and the third emitting regions PXA-B can be arranged alternately in sequence along the first direction DR1.

[0068] Figure 3 The illustration shows that the areas of the emitting regions PXA-R, PXA-G, and PXA-B are all similar, but the embodiment is not limited to this; the areas of the emitting regions PXA-R, PXA-G, and PXA-B may differ from each other depending on the wavelength range of the emitted light. The areas of the emitting regions PXA-R, PXA-G, and PXA-B can refer to the areas as viewed in a plane defined by the first direction DR1 and the second direction DR2.

[0069] The areas of the light-emitting regions PXA-R, PXA-G, and PXA-B can be different from each other. For example, in an embodiment, the area of ​​the second light-emitting region PXA-G, which emits green light, can be smaller than the area of ​​the third light-emitting region PXA-B, which emits blue light, but the embodiment is not limited to this.

[0070] like Figure 3 As shown, the arrangement of the light-emitting regions PXA-R, PXA-G, and PXA-B is not limited. For example, the arrangement order of the first light-emitting region PXA-R, the second light-emitting region PXA-G, and the third light-emitting region PXA-B can be configured in various combinations according to the desired characteristics of the display quality of the display device DD. For example, the light-emitting regions PXA-R, PXA-G, and PXA-B can be arranged as described by Samsung Display Co., Ltd. of Yongin City, South Korea, under the trade name... Sales matrix or diamond layout.

[0071] Figure 4 It is along Figure 3 The image shows a cross-sectional view of the display device taken along line I-I'. The display device DD may include a display panel DP, a light control layer WCL, and a color correction layer CRL stacked sequentially. The display panel DP may include a substrate layer BS, a circuit layer DP-CL, and a light-emitting element layer DP-OEL stacked sequentially.

[0072] The color correction layer (CRL) can include organic dyes and metal compounds (such as dithiolene metal compounds) containing at least one dithiolene moiety. The organic dyes included in the CRL improve the color gamut of light output from the display panel (DP). The dithiolene metal compounds included in the CRL improve the photostability of the organic dyes. Even when the CRL is exposed to light for extended periods, the dithiolene metal compounds prevent the organic dyes from being photodegraded. Therefore, due to the organic dyes and dithiolene metal compounds included in the CRL, the CRL can continuously improve the color gamut even after prolonged exposure to light, thus improving the reliability of the CRL. (See below for reference.) Figures 5 to 7 A more detailed description of the color correction layer (CRL).

[0073] The substrate layer BS included in the display panel DP can be rigid or flexible. The substrate layer BS can be a polymer substrate, plastic substrate, glass substrate, metal substrate, composite material substrate, etc. The substrate layer BS can have a single-layer structure or a multi-layer structure. The substrate layer BS can include a synthetic resin film, and the substrate layer BS can have a multi-layer structure comprising multiple synthetic resin film layers. The synthetic resin film can include one or more of polyimide resins, acrylic resins, vinyl resins, epoxy resins, polyurethane resins, cellulose resins, and perylene resins, but the synthetic resin film material is not limited to the above examples.

[0074] The DP-CL circuit layer can be disposed on the substrate layer BS. The DP-CL circuit layer may include an insulating layer, semiconductor patterns, conductive patterns, signal lines, etc. The DP-CL circuit layer may include multiple transistors formed from semiconductor patterns, conductive patterns, signal lines, etc. Each transistor may include a control electrode, an input electrode, and an output electrode. For example, the DP-CL circuit layer may include a switching transistor and a driving transistor for driving the light-emitting element OEL. The DP-OEL light-emitting element layer can be disposed on the DP-CL circuit layer. The DP-OEL light-emitting element layer may include a pixel defining layer PDL, a light-emitting element OEL, and a packaging layer TFE.

[0075] The light-emitting element (OEL) may include a first electrode EL1 and a second electrode EL2 facing each other, and an emitting layer OL is disposed between the first electrode EL1 and the second electrode EL2. The OEL may also include a hole transport region and an electron transport region. The OEL may include a hole transport region, an emitting layer OL, and an electron transport region stacked sequentially.

[0076] The light-emitting element (OEL) generates light by recombination of holes and electrons injected from the first electrode EL1 and the second electrode EL2 within the emitting layer OL. The light generated in the emitting layer OL can be a first light with a specific wavelength range. For example, the first light can be blue light. The light-emitting element layer DP-OEL can provide the first light generated in the emitting layer OL to the light control layer WCL.

[0077] The light-emitting element (OEL) is not limited to organic light-emitting elements, and can also be a nano-light-emitting element or a quantum dot light-emitting element. The light source included in the emitting layer (OL) can be a nanomaterial, quantum dot, or quantum rod, and the light-emitting element (OEL) can provide light through the light source included in the emitting layer (OL).

[0078] A pixel-defining layer (PDL) can be disposed on a circuit layer (DP-CL). Some openings can be defined within the PDL. When viewed in a plane, the openings defined in the PDL can be superimposed on multiple light-emitting regions (PXA-R, PXA-B, and PXA-G), respectively. A non-light-emitting region (NPXA) can be a region located between adjacent light-emitting regions (PXA-R, PXA-B, and PXA-G), and can be a region corresponding to the PDL.

[0079] The pixel defining layer (PDL) may comprise organic resins or inorganic materials. For example, the pixel defining layer (PDL) may be formed comprising polyacrylate resins, polyimide resins, or silicon nitride (SiN). x ), silicon dioxide (SiO) x ), silicon oxynitride (SiO) x N y )wait.

[0080] The TFE encapsulation layer can be disposed on and seal the OEL (Optical Image Source). The TFE encapsulation layer can be used to protect the OEL from moisture and / or oxygen, and to protect the OEL from foreign matter such as dust particles.

[0081] Although the TFE encapsulation layer is Figure 4 The layer is shown as a single layer, but it may include at least one organic layer and an inorganic layer, or it may include both organic and inorganic layers. For example, the encapsulation layer TFE may have a structure in which organic and inorganic layers are stacked alternately, or a structure in which inorganic layers are stacked and organic layers are disposed between the inorganic layers.

[0082] The inorganic layer included in the encapsulation layer TFE may include, for example, a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, an aluminum oxide layer, etc., but the embodiments are not particularly limited to the above examples. The organic layer included in the encapsulation layer TFE may include an acrylic organic film, but the embodiments are not particularly limited to the above examples.

[0083] The light control layer (WCL) can be disposed on the display panel (DP). The WCL can also be disposed on the encapsulation layer (TFE) included in the display panel (DP). An outer coating layer can be further disposed between the encapsulation layer (TFE) and the light control layer (WCL). The outer coating layer can be a planarization layer or a buffer layer.

[0084] The optical control layer WCL may include multiple optical control units WCP1 and WCP2, a transmissive element in the form of a transmissive element TP, a partition wall BK, and a cover layer CPL. The multiple optical control units WCP1 and WCP2 and the transmissive element TP may be arranged to be separated from each other, with the partition wall BK positioned between the multiple optical control units WCP1 and WCP2 and the transmissive element TP. The cover layer CPL may be disposed below the multiple optical control units WCP1 and WCP2, the transmissive element TP, and the partition wall BK to cover the lower surfaces of the multiple optical control units WCP1 and WCP2, the transmissive element TP, and the partition wall BK.

[0085] like Figure 4 As shown, the plurality of light control units WCP1 and WCP2 may include a first light control unit WCP1 and a second light control unit WCP2. Each of the plurality of light control units WCP1 and WCP2 may include a matrix resin and quantum dots QD1 and QD2, which may be included in the matrix resin in a dispersed form.

[0086] Quantum dots QD1 and QD2, included in each of the plurality of light control units WCP1 and WCP2, can convert first light provided by the DP-OEL light-emitting element layer into light with different wavelength ranges. The first light control unit WCP1 may include a first quantum dot QD1 configured to convert the first light into second light with different wavelength ranges. The second light control unit WCP2 may include a second quantum dot QD2 configured to convert the first light into third light with different wavelength ranges.

[0087] For example, the first light can be blue light. The first quantum dot QD1 included in the first light control unit WCP1 can convert blue light into red light. The second quantum dot QD2 included in the second light control unit WCP2 can convert blue light into green light. Therefore, the first light-emitting region PXA-R corresponding to the first light control unit WCP1 can output red light, and the second light-emitting region PXA-G corresponding to the second light control unit WCP2 can output green light.

[0088] The quantum dots QD1 and QD2, which may be included in each of the multiple optical control units WCP1 and WCP2, may be semiconductor nanocrystals selected from group II-VI compounds, group III-IV compounds, group III-V compounds, group IV-VI compounds, group IV elements or compounds, group I-III-VI compounds, or combinations thereof.

[0089] Group II-VI compounds may be selected from the group consisting of: binary compounds selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; ternary compounds selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, Cd Group III-IV compounds may include binary compounds (such as In₂S₃ and In₂Se₃), ternary compounds (such as InGaS₃ and InGaSe₃), or any combination thereof.

[0090] Group III-V compounds may be selected from the group consisting of: binary compounds selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; ternary compounds selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof; and quaternary compounds selected from GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaAlNP, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof. Group III-V compounds may also include Group II metals, such as InZnP.

[0091] Group IV-VI compounds may be selected from the group consisting of: binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. Group IV elements may be selected from the group consisting of Si, Ge and mixtures thereof. Group IV compounds may be binary compounds selected from the group consisting of SiC, SiGe and mixtures thereof. Group I-III-VI compounds may include ternary compounds such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, AgAlO2 or any combination thereof.

[0092] In this context, binary, ternary, or quaternary compounds can exist in the particles at a uniform concentration, or they can exist in the same particle while being divided into partially different concentration distributions. Quantum dots QD1 and QD2 can have a core-shell structure comprising a core and a shell surrounding the core. Alternatively, they can have a core / shell structure where one quantum dot surrounds another. The interface between the core and shell can have a concentration gradient, such that the concentration of the element present in the shell gradually decreases towards the center of the interface.

[0093] Examples of shells for quantum dots QD1 and QD2 may include metal or non-metal oxides, semiconductor compounds, or combinations thereof. For example, the metal or non-metal oxides used in the shell may be shown as binary compounds (such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, and NiO) or ternary compounds (such as MgAl2O4, CoFe2O4, NiFe2O4, and CoMn2O4), but the embodiments are not limited thereto.

[0094] Additionally, semiconductor compounds can be shown as, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the embodiments are not limited thereto. The quantum dots QD1 and QD2 can control the color of the emitted light according to the particle size; therefore, quantum dots QD1 and QD2 can have various emission colors such as green and red. Because of the small particle size, quantum dots can emit light in a shorter wavelength region. For example, the particle size of a quantum dot emitting green light can be smaller than the particle size of a quantum dot emitting red light.

[0095] The transmissive portion TP can transmit the first light provided by the light-emitting element layer DP-OEL. For example, the transmissive portion TP can transmit blue light, and the third light-emitting region PXA-B corresponding to the transmissive portion TP can output blue light.

[0096] Reference Figure 4 The transmissive portion TP may include a light-transmitting resin and may also include a scattering element SP dispersed in the light-transmitting resin. For example, the transmissive portion TP may include acrylic resin, imide resin, epoxy resin, etc. However, the light-transmitting resin included in the transmissive portion TP according to the embodiments has excellent dispersion properties for the scattering element SP, and can be used as long as it is a material with a certain degree of transparency. The light-transmitting resin is not limited to any of the examples above.

[0097] The diffuser SP prevents light emitted from the display panel DP from passing directly through the transmissive element TP on the third-direction DR3, but instead allows it to be reflected in all directions via Lambertian reflection. That is, without changing the wavelength range of the incident light, the diffuser SP can scatter light in all directions regardless of the angle of incidence. This allows the diffuser SP to improve the side visibility of light emitted from the display panel DP.

[0098] Including but not limited to Figure 4 In the embodiment shown, at least one of the plurality of light control units WCP1 and WCP2 may further include a scatterer SP. The scatterer SP may be dispersed in the resin included in each of the plurality of light control units WCP1 and WCP2. The scatterer SP included in the plurality of light control units WCP1 and WCP2 reflects light supplied from the display panel DP in various directions, thereby increasing the probability of light incident on the quantum dots QD1 and QD2. This allows the scatterer SP included in the plurality of light control units WCP1 and WCP2 to increase the efficiency of the quantum dots QD1 and QD2 in converting wavelength ranges.

[0099] The scatterer SP may include a light-reflecting material or a material having a refractive index different from that of the resin included in the multiple light control sections WCP1 and WCP2 and the transmission section TP. For example, the scatterer SP may include a metal oxide or an organic material. The metal oxide may be titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), tin oxide (SnO2), etc., and the organic material may be an acrylic resin or a polyurethane resin. Therefore, the scatterer SP may include a material that can form an optical interface with the resin included in the multiple light control sections WCP1 and WCP2 and the transmission section TP, thereby partially scattering light. The embodiments are not limited to any particular construction.

[0100] The partition wall BK separates the boundaries between multiple light control sections WCP1 and WCP2, as well as the transmissive section TP. When viewed in a plane, the partition wall BK can be superimposed on the non-emitting area NPXA. The partition wall BK prevents light leakage. For example, the partition wall BK may include organic light-shielding materials, black pigments, black dyes, etc.

[0101] like Figure 4 As shown in the illustration, by way of example, the cover layer CPL can be disposed below the light control units WCP1 and WCP2, the transmission unit TP, and the partition wall unit BK. The cover layer CPL can prevent the light control units WCP1 and WCP2 and the transmission unit TP from being exposed to moisture / oxygen.

[0102] The capping layer CPL can include inorganic materials. For example, the capping layer CPL can include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride, or a metal film thereof that ensures light transmittance. The capping layer CPL can also include an organic layer. The capping layer CPL can consist of a single layer or multiple layers.

[0103] A color correction layer (CRL) can be placed on top of the light control layer (WCL). The CRL improves the color gamut of the image provided by the display panel (DP) and the WCL. Furthermore, even when exposed to light for extended periods, the CRL maintains its color gamut improvement. Additionally, the CRL protects the WCL and the display panel (DP) located beneath it.

[0104] The color correction layer (CRL) can include organic dyes and dithiole metal compounds. Organic dyes and dithiole metal compounds can exhibit high light absorption within a specific wavelength range.

[0105] The maximum absorption wavelength of organic dyes can be longer than the peak wavelength of green light output by the display panel (DP) and the light control layer (WCL), but shorter than the peak wavelength of red light. For example, the maximum absorption wavelength of organic dyes can be from approximately 580 nm to approximately 600 nm.

[0106] The maximum absorption wavelength here refers to the wavelength of light at which the absorbing material has the highest absorbance. The maximum absorption wavelength range refers to the range of wavelengths that include the material's maximum absorption wavelength value.

[0107] Organic dyes included in the color correction layer CRL can have approximately 10,000 (10) at the maximum absorption wavelength. 4 M -1 cm -1 Or a larger molar extinction coefficient. The molar extinction coefficient can affect absorbance and can vary depending on the type of material. For example, organic dyes included in the color correction layer CRL can have a molar extinction coefficient of approximately 10,000 (10⁻¹⁰) in the wavelength range of approximately 580 nm to approximately 600 nm. 4 M -1 cm -1 Or a larger molar extinction coefficient, and therefore can absorb more light in the wavelength range of about 580 nm to about 600 nm than light in other wavelength ranges.

[0108] Organic dyes can absorb light in wavelength regions where the wavelengths of green and red light overlap (or intersect), thereby reducing the transmittance in the corresponding wavelength regions. In the light output from the display panel (DP) and the light control layer (WCL), light in wavelength regions where the wavelengths of green and red light overlap can have reduced transmittance while passing through the color correction layer (CRL). Therefore, the peak shapes of the green and red light wavelengths output from the display device (DD) can become sharper through the color correction layer (CRL), thus improving the color gamut of the display device (DD).

[0109] The absorbance of organic dyes exhibits a roughly upward-convex parabolic shape depending on the wavelength range, with the maximum absorption wavelength located in the middle. Here, half-width refers to the difference between the wavelengths containing half the maximum absorbance value within the wavelength range. A small half-width allows absorption of light within a relatively narrow wavelength range, while a large half-width allows absorption of light within a relatively wide wavelength range.

[0110] Organic dyes can have a predetermined half-width in the wavelength region where the wavelengths of green and red light overlap. For example, the half-width of an organic dye can be approximately 20 nm. Thus, organic dyes can improve the color gamut of a display device (DD) by sharpening the peaks of the wavelengths of green and red light without affecting the output of green and red light from the display device. However, the half-width of the organic dye is not necessarily limited to the above value.

[0111] The transmittance of the color correction layer (CRL), including organic dyes, can be less than 1 within a specific wavelength range. For example, the transmittance of the CRL can be about 0.6 or less at wavelengths from about 580 nm to about 600 nm, and about 0.6 or greater (close to 1) in wavelength regions other than from about 580 nm to about 600 nm. The relatively lower transmittance of the CRL in the wavelength region between the peak wavelengths of green and red light compared to other wavelength regions allows the CRL to reduce transmittance in the wavelength region where the wavelengths of green and red light overlap in the light provided by the display panel (DP) and the light control layer (WCL). Therefore, the color gamut of the display device (DD) can be improved.

[0112] Dithiolene metal compounds can exhibit high light absorption properties in the near-infrared region. The maximum absorption wavelength of dithiolene metal compounds can be longer than the peak wavelength of red light emitted by the display panel (DP) and the light control layer (WCL). For example, the maximum absorption wavelength of dithiolene metal compounds can be approximately 700 nm or greater.

[0113] Dithiole metal compounds can be used as light stabilizers due to their stereochemical and electronic properties. These compounds can stabilize electrons that are unstable due to light, thereby preventing the photodegradation of organic dyes.

[0114] The maximum absorption wavelength range of organic dyes does not need to overlap with that of metal compounds. Organic dyes can absorb light in the wavelength region between green and red light wavelengths, thereby improving the color gamut of green and red light. Dithiol olefin metal compounds can absorb light in the near-infrared region, thus acting as light stabilizers to enhance the photostability of organic dyes without affecting the photostability of light in the visible light region output from the display device.

[0115] Based on the total weight of the color correction layer CRL, organic dyes may be included in an amount from about 0.1 wt% to about 10 wt%. The color correction layer CRL may include a matrix resin, organic dyes, and metal compounds. Here, the total weight of the color correction layer CRL may be the sum of the weights of the matrix resin, organic dyes, and dithiol olefin metal compounds included in the color correction layer CRL.

[0116] The color correction layer (CRL) can be formed by dissolving organic dyes in a matrix resin. However, if the content of organic dyes is too high, the organic dyes will not dissolve sufficiently in the matrix resin and will aggregate. Aggregated organic dyes will be visually identifiable in the display device (DD) or may affect the light transmittance of the display device (DD).

[0117] The amount of dithiolene metal compounds included in the color correction layer (CRL) can be less than the amount of organic dyes. If the amount of metal compounds is greater than the amount of organic dyes, the improvement in color gamut by the organic dyes will be reduced. The amount of dithiolene metal compounds in the color correction layer (CRL) can be about 50% or less of the amount of organic dyes. For example, based on the total weight of the color correction layer (CRL), dithiolene metal compounds can be included in amounts from about 0.1 wt% to about 10 wt% (e.g., from about 0.1 wt% to about 5 wt%).

[0118] The color correction layer (CRL) may include one or more organic dyes having the aforementioned maximum absorption wavelength range and molar extinction coefficient. For example, the one or more organic dyes included in the color correction layer (CRL) may be organic dyes having the same functional groups but different substituents, or they may be organic dyes having different functional groups from each other.

[0119] The organic dyes included in the color correction layer (CRL) can be at least one of the following: anthraquinone compounds, phthalocyanine compounds, azo compounds, perylene compounds, xanthanium compounds, diimmonium-based compounds, dipyrromethene-based compounds, tetrazaporphyrin compounds, porphyrin compounds, squarylium-based compounds, oxazine compounds, triarylmethane compounds, and cyanine-based compounds.

[0120] Specifically, the organic dye included in the color correction layer CRL can be at least one compound (such as squaricine compounds) that includes a squaricine moiety and has high absorption properties in the wavelength range of about 580 nm to about 600 nm. However, the organic dye can be included in the color correction layer CRL as long as it includes a compound with high absorption properties in the aforementioned wavelength range, and the organic dye is not limited to the above-mentioned compounds.

[0121] A functional group refers to a specific group of atoms or structure that plays an important role in determining the properties of a compound. It can include the chromophore that causes color development, which is one of the functional groups in an organic dye. For example, functional groups can include anthraquinone, phthalocyanine, azo, perylene, xanthones, diammonium, dipyrrole methylene, tetrazaporphyrin, porphyrin, squaricine, oxazine, triarylmethane, anthocyanin, etc. Dyes containing specific functional group structures can be called "specific functional group compounds." For example, compounds containing the squaricine structure can be called squaricine compounds.

[0122] Dithiolene metal compounds may include one or more metal compounds that satisfy the aforementioned maximum absorption wavelength range. Dithiolene metal compounds may include bis(dithiobenzyl) compounds with chelating ligands. Bis(dithiobenzyl) compounds may include transition metals such as copper, cobalt, and nickel as the center metal. Dithiolene metal compounds included in the color correction layer (CRL) may be one or more metal compounds with different substituents or different center metals.

[0123] Specifically, the dithiol-based metal compound included in the color correction layer CRL can be a bis(dithiobenzyl)nickel compound with high absorption properties in the wavelength region of about 700 nm or greater. However, the dithiol-based metal compound is not necessarily limited to the above compounds.

[0124] In a display device (DD), the polarizer layer, which is one of the optical functional layers, can be omitted. By omitting the polarizer layer, the display device (DD) not only provides a relatively thinner display device compared to those including a polarizer layer, but also simplifies the manufacturing process. Furthermore, even without the polarizer layer, the display device (DD) can still provide a display with an improved color gamut through the color correction layer (CRL).

[0125] Figure 5 The transmittance of the color correction layer, constructed according to the principle of the invention, is depicted graphically based on the wavelength. Figure 6A This is a graphical representation of the absorbance of the color correction layer in the comparison example, based on wavelength. Figure 6B The absorbance of a color correction layer constructed according to the principles of the invention is graphically depicted based on wavelength.

[0126] Figure 5 The transmittance curve of a color correction layer comprising a squaricine compound as an organic dye is shown as a function of wavelength. The transmittance curve of the color correction layer CRL comprising the organic dye has a downwardly convex parabolic shape in the wavelength range of about 500 nm to about 610 nm. According to an embodiment of the invention, the transmittance of the color correction layer CRL is about 0.6 or less in the wavelength range of about 550 nm to about 600 nm, specifically, a low value of about 0.2 or less in the wavelength range of about 580 nm. In this embodiment, the transmittance of the color correction layer CRL can have a value close to 1 in the wavelength region other than about 500 nm to about 610 nm.

[0127] Therefore, by using organic dyes with a maximum absorption wavelength range of approximately 580 nm to approximately 600 nm, the color correction layer (CRL) can reduce transmittance in the wavelength region between green and red light, while having almost no effect on transmittance at each peak wavelength of blue, green, and red light. This allows for an improvement in the color gamut of light transmitted through the color correction layer (CRL).

[0128] Figure 6A The absorbance curves of a color correction layer consisting only of organic dyes (hereinafter, the color correction layer of the comparative example) are shown as a function of wavelength. Figure 6B The absorbance curves of a color correction layer comprising organic dyes and dithiole metal compounds (hereinafter, the exemplary example color correction layer) are shown as a function of wavelength. Figure 6A and Figure 6B The values ​​T1 to T4 indicate how the absorbance changes as the color correction layer is exposed to light in the ultraviolet region. That is, the exposure time of the color correction layer increases from T1 to T4.

[0129] Reference Figure 6A and Figure 6B It can be seen that the color correction layers of the comparative example and the exemplary example have maximum absorbance in the wavelength range of approximately 580 nm to approximately 600 nm. Furthermore, comparing the absorbance curves corresponding to T1, it can be seen that the color correction layers of the comparative example and the exemplary example have almost identical absorbance values. However, through… Figure 6A and Figure 6B As can be seen from the curves shown, the absorbance of the color correction layer in the comparison example and the color correction layer in the exemplary example become different as the exposure time increases.

[0130] Reference Figure 6A As can be seen, the absorbance of the color correction layer in the comparative example decreases from T1 to T4 in the wavelength region from approximately 580 nm to approximately 600 nm. Therefore, as the exposure time of the color correction layer increases, the organic dyes are photodecomposed, and as the organic dyes decompose, the absorbance of the color correction layer decreases within the range of the organic dyes' maximum absorption wavelengths. In other words, because the color correction layer of the comparative example, which only includes organic dyes, is exposed to light for a long time, the effect of the organic dyes in improving the color gamut is reduced.

[0131] Reference Figure 6BAs can be seen, in the wavelength region from approximately 580 nm to approximately 600 nm, the absorbance of the exemplary color correction layer remains at a value of approximately 1.2 or greater, without a significant decrease from T1 to T4. Therefore, dithiolene metal compounds can be used as photostable agents to enhance the photostable stability of organic dyes, preventing photodegradation of the organic dyes even after prolonged exposure to light. That is, even with prolonged exposure to light, the effect of the organic dyes in improving the color gamut is not significantly reduced, and reliability can also be improved.

[0132] Figure 7 It is based on the information Figure 4 The described invention's principle constructs exemplary and comparative examples of light normalization intensity graphically depicted according to wavelength. Light normalization intensity is represented by converting the intensity of light according to wavelength into integer values ​​between 1 and 100. The exemplary example's display device includes... Figure 2 The display device DD shown includes a display panel DP, a light control layer WCL, and a color correction layer CRL. The comparative example display device does not include... Figure 2 The color correction layer CRL in the display device DD shown is a display device.

[0133] Reference Figure 7 The curves with thin solid lines shown in the illustrations, the exemplary examples and the comparative examples, show that the normalized intensity of the light has almost the same value in the wavelength region of approximately 420 nm to approximately 510 nm corresponding to blue light and in the wavelength region of approximately 590 nm to approximately 700 nm corresponding to red light. However, referring to... Figure 7 The dashed and thick solid lines shown represent the differences in normalized intensity of light in the exemplary and comparative examples, corresponding to wavelengths from approximately 490 nm to approximately 610 nm, relative to green light. That is, the normalized intensity of light in the comparative and exemplary examples exhibits similar values ​​in the blue and red light wavelength regions, but differs in the green light wavelength region.

[0134] When comparing the normalized intensity curves of the exemplary example and the comparative example, it can be seen that the curve of the exemplary example is narrower in the green light region. That is, in the green light region, the half-width of the light intensity of the exemplary example can be smaller than the half-width of the light intensity of the comparative example. In addition, in the light intensity curve of the exemplary example, the overlapping portion of the green and red light regions can be significantly reduced compared to the curve of the comparative example.

[0135] Therefore, the organic dyes included in the color correction layer (CRL) can increase the light absorption of the CRL in the wavelength range of approximately 580 nm to approximately 600 nm. Consequently, the color spectrum output from the display device (DD) has a small half-width and a sharp shape in the green light wavelength range. Furthermore, the organic dyes can reduce the area where the green and red wavelength regions overlap. Therefore, the display device (DD) including the color correction layer (CRL) can have an improved color gamut due to the organic dyes.

[0136] A higher color gamut allows for the representation of a wider variety of colors, closer to natural colors. Based on a contrasting example of a display device without a color correction layer (CRL), the color gamut of a display device (DD) including a CRL increases by approximately 110%. Therefore, a color correction layer (CRL) incorporating organic dyes and dithiolene metal compounds can improve the color gamut of a display device (DD) and provide users with a display device (DD) offering improved reliability.

[0137] The color correction layer included in a display device constructed according to the principles and embodiments of the invention may include organic dyes and dithiol-based metal compounds. The color correction layer may include organic dyes having a maximum absorption wavelength range longer than the peak wavelength of green light and shorter than the peak wavelength of red light to improve the color gamut of the display device. The color correction layer may include dithiol-based metal compounds as light stabilizers, so that the improved color gamut effect is maintained even when the display device is exposed to light for extended periods. Furthermore, the maximum absorption wavelength range of the dithiol-based metal compounds is located in the near-infrared region, where the wavelength is longer than the peak wavelength of red light; therefore, the dithiol-based metal compounds can act as light stabilizers without affecting light absorption in the visible light region. That is, the dithiol-based metal compounds do not reduce the color gamut of the image provided by the display device.

[0138] While certain embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to these embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements as will be apparent to those skilled in the art.

Claims

1. A display device comprising: a display panel including a light-emitting element to provide first light; a light control layer provided over the display panel; and a color correction layer provided over the light control layer, wherein the color correction layer includes an organic dye having a maximum absorption wavelength of 580 nm to 600 nm and a metal compound including at least one dithiolene moiety having a maximum absorption wavelength of 700 nm or more. The maximum absorption wavelength range of the organic dye does not overlap with the maximum absorption wavelength range of the metal compound.

2. The display device according to claim 1, wherein The color correction layer has a light transmittance of 0.6 or less at a wavelength of 580 nm to 600 nm.

3. The display device according to claim 1, wherein In the color correction layer, the content of the metal compound including a dithiolene metal compound is less than the content of the organic dye.

4. The display device according to claim 1, wherein The molar extinction coefficient of the organic dye at the maximum absorption wavelength is 10,000 M -1 cm -1 or more.

5. The display device according to claim 1, wherein The organic dye is included in an amount of 0.1 wt% to 10 wt% based on the total weight of the color correction layer.

6. The display device according to claim 1, wherein The metal compound is included in an amount of 0.1 wt% to 5 wt% based on the total weight of the color correction layer.

7. The display device according to claim 1, wherein The organic dye includes at least one compound including a squarylium moiety.

8. The display device according to claim 1, wherein The metal compound includes at least one bis(dithiobenzyl)nickel compound.

9. The display device according to claim 1, wherein The light-emitting element includes an organic light-emitting element, a nano light-emitting element, or a quantum dot light-emitting element.

10. The display device according to claim 1, wherein The light control layer includes:

11. The display device according to claim 1, wherein a first light control portion including a first quantum dot to convert the first light into second light having a different wavelength range; a second light control portion including a second quantum dot to convert the first light into third light having a different wavelength range; and a transmissive portion transmitting the first light.

12. The display device according to claim 11, further comprising a scatterer in at least one of the first light control portion, the second light control portion, and the transmissive portion. The display panel is a flexible display panel.

13. The display device of claim 1, wherein, 14. A display device comprising: a light-emitting element layer providing blue light; a light control layer provided over the light-emitting element layer; and a color correction layer provided over the light control layer, wherein the light control layer includes a first light control portion including a first quantum dot to convert the blue light into green light, a second light control portion including a second quantum dot to convert the blue light into red light, and a transmissive portion transmitting the blue light, and the color correction layer includes an organic dye having a maximum absorption wavelength longer than a peak wavelength of the green light and a metal compound including at least one dithiolene moiety having a maximum absorption wavelength longer than a peak wavelength of the red light. The maximum absorption wavelength range of the organic dye does not overlap with the maximum absorption wavelength range of the metal compound. The maximum absorption wavelength of the organic dye is longer than the peak wavelength of the green light and shorter than the peak wavelength of the red light.

15. The display device of claim 14, wherein, In the color correction layer, the content of the metal compound is 50% or less of the content of the organic dye.

16. The display device of claim 14, wherein, ​ 17. The display device of claim 14, wherein, The molar extinction coefficient of the organic dye at the maximum absorption wavelength is 10,000 M -1 cm -1 or more.

18. The display device of claim 14, wherein, ​ 19. The display device of claim 14, wherein, The organic dye is included in an amount of 0.1 to 10 wt% and the metal compound is included in an amount of 0.1 to 5 wt% based on the total weight of the color correction layer.

20. The display device of claim 14, wherein, The organic dye includes at least one squarylium compound and the metal compound includes at least one bis(dithiobenzyl)nickel compound.

Images