Display device

Abstract

A display device includes a light emitting device layer emitting first light having a peak wavelength of 500 nm or less; a color control layer disposed on the light emitting device layer, the color control layer including a conversion element converting the first light; a color filter layer disposed on the color control layer; and an absorptive scattering element provided in or on the color control layer. The absorptive scattering element can include a light absorbing portion in which an absorption rate of green light or red light is greater than an absorption rate of the first light. Accordingly, a reflectance of the display device to external light can be reduced.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0049438, filed on April 23, 2020, which is incorporated herein by reference for all purposes, as fully set forth herein. Technical Field

[0003] This invention relates to display devices, and more particularly to display devices configured to reduce the reflectivity of external light. Background Technology

[0004] Various display devices are being developed for multimedia applications, such as televisions, mobile phones, and tablet computers. To produce color images, the display panel within these devices includes different types of color control layers based on the pixels. These color control layers transmit source light within a specific wavelength range or alter the color of the source light.

[0005] Some of the source light that passes through the color control layer is not converted by the color conversion material but is absorbed by the color filter. In other words, the display device encounters a light loss problem. Therefore, it is necessary to develop structures that can improve luminous efficiency.

[0006] 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

[0007] An exemplary embodiment of the present invention provides a display device including a color control component, wherein an absorptive scattering element with a high optical absorption rate in a specific wavelength range is added, thereby reducing the reflectivity of external light.

[0008] Further features of the inventive concept will be set forth in the following description, and will be apparent in part from the description, or may be recognized by practice of the inventive concept.

[0009] An exemplary embodiment of the present invention provides a display device comprising a light-emitting layer emitting first light with a peak wavelength of 500 nm or less; a color control layer disposed on the light-emitting layer, the color control layer including an emitting element for converting the first light; a color filter layer disposed on the color control layer; and an absorptive scattering element provided in or on the color control layer. The absorptive scattering element includes a light-absorbing portion in which the absorption rate of green or red light is greater than the absorption rate of the first light.

[0010] The light absorption section can have an average transmittance of 70% or higher for light with a peak wavelength of 440nm to 500nm, and an average transmittance of 10% or lower for light with a peak wavelength of 520nm to 780nm.

[0011] The emitting element can be a quantum dot or a phosphor.

[0012] The color control layer may include a color control unit, which includes an emitting element and an absorbing scattering element, and the weight ratio of the absorbing scattering element relative to the total weight of the color control unit may be in the range of 1 wt% to 10 wt%.

[0013] An absorptive scattering element may include a central portion having a scatterer, and a light-absorbing portion may be disposed on the surface of the central portion.

[0014] The color control layer may include a first color control unit, the first color control unit including a first emitting element configured to convert first light into second light having a peak wavelength different from that of the first light; and a second color control unit, the second color control unit including a second emitting element configured to convert the first light into third light having a peak wavelength different from that of the first light; and a second color control unit, the second color control unit including a second emitting element configured to convert the first light into third light having a peak wavelength different from that of the first light. An absorptive scattering element may be provided in at least one of the first color control unit and the second color control unit.

[0015] One of the first color control unit and the second color control unit may include an absorptive scattering element, and the other may include a dispersive scattering element, wherein the dispersive scattering element includes at least one of TiO2, ZrO3, Al2O3, MgO, In2O3, ZnO, SnO2, Sb2O3, SiO2 and ITO.

[0016] The color control layer may further include a third color control unit configured to transmit the first light, and the third color control unit may include a dispersive scattering element, the dispersive scattering element including at least one of TiO2, ZrO3, Al2O3, MgO, In2O3, ZnO, SnO2, Sb2O3, SiO2 and ITO.

[0017] The display device may further include a scattering layer disposed on the color control layer. The scattering layer may include an absorptive scattering element.

[0018] The scattering layer can be placed between the color control layer and the color filter layer.

[0019] The color control layer may include a first color control unit, the first color control unit including a first emitting element that converts first light into second light, the second light having a peak wavelength different from the peak wavelength of the first light; a second color control unit, the second color control unit including a second emitting element that converts the first light into third light, the third light having a peak wavelength different from the peak wavelength of the first light; and a third color control unit that transmits the first light.

[0020] The third color control unit may further include an absorptive scattering element.

[0021] The color filter layer may include a first color filter disposed on a first color control unit and configured to transmit a second light, a second color filter disposed on a second color control unit and configured to transmit a third light, and a protective portion disposed on a third color control unit and configured to transmit the first light to the third light.

[0022] Another exemplary embodiment of the present invention provides a display device comprising a light-emitting layer emitting blue light; a color control layer disposed on the light-emitting layer, the color control layer including an emitting element configured to convert blue light into visible light with a wavelength longer than blue light; a color filter layer disposed on the color control layer; and an absorptive scattering element provided in the color control layer or between the color control layer and the color filter layer. The absorptive scattering element includes a scatterer and a light-absorbing portion, the light-absorbing portion including a blue pigment or blue dye disposed on the surface of the scatterer.

[0023] The light absorption section can have an average transmittance of 70% or higher for light with a peak wavelength of 440nm to 500nm and an average transmittance of 10% or lower for light with a peak wavelength of 520nm to 780nm.

[0024] The light absorption portion may include phthalocyanine blue (C 32 H 16 At least one of CuN8 and cobalt blue (CoAl2O4).

[0025] The color control layer may include a first color control unit, which includes a first emitting element configured to convert blue light into green light; a second color control unit, which includes a second emitting element configured to convert blue light into red light; and a third color control unit, which includes a dispersive scattering element. The color filter layer may include a green color filter disposed on the first color control unit and a red color filter disposed on the second color control unit.

[0026] The first color control unit or the second color control unit may include an absorptive scattering element, and the weight ratio of the absorptive scattering element relative to the total weight of the first color control unit or the second color control unit having the absorptive scattering element may be in the range of 1 wt% to 10 wt%.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0028] The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the inventive concept.

[0029] Figure 1 An exploded perspective view illustrating an electronic device according to an embodiment of the present invention.

[0030] Figure 2 For along Figure 1 A cross-sectional view taken along line I-I' to illustrate a display device according to an embodiment of the present invention.

[0031] Figure 3 A plan view illustrating a display device according to an embodiment of the present invention.

[0032] Figure 4 For along Figure 3 A cross-sectional view taken along line II-II' to illustrate a display device according to an embodiment of the present invention.

[0033] Figure 5 An enlarged cross-sectional view of a color control component according to an embodiment of the present invention is shown.

[0034] Figure 6 A cross-sectional view is shown to illustrate an absorptive scattering element according to an embodiment of the present invention.

[0035] Figure 7 A cross-sectional view is shown to illustrate a color control component according to an embodiment of the present invention.

[0036] Figure 8 A cross-sectional view is shown to illustrate a color control component according to an embodiment of the present invention.

[0037] Figure 9 A cross-sectional view is shown to illustrate a color control component according to an embodiment of the present invention.

[0038] Figure 10A cross-sectional view is shown to illustrate a color control component according to an embodiment of the present invention.

[0039] Figure 11 A cross-sectional view illustrating a display device according to an embodiment of the present invention.

[0040] Figure 12 A cross-sectional view illustrating a display device according to an embodiment of the present invention.

[0041] It should be noted that these figures are intended to illustrate the general characteristics of the methods, structures, and / or materials used in some exemplary embodiments and to supplement the written description provided below. However, these figures are not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments. For example, the relative thickness and location of molecules, layers, regions, and / or structural elements may be reduced or enlarged for clarity. The use of similar or identical reference numerals in the various figures is intended to indicate the presence of similar or identical elements or features. Detailed Implementation

[0042] In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of various exemplary embodiments of the invention. As used herein, “implementation” is a non-limiting example of an apparatus or method employing one or more of the inventive concepts disclosed herein. However, it will be apparent that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are illustrated in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, configuration, and characteristics of one exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0043] Unless otherwise specified, the illustrated exemplary embodiments should be understood as providing exemplary features of different details of how the inventive concept can be implemented in practice. Therefore, unless otherwise specified, features, components, modules, layers, films, panels, regions and / or aspects (hereinafter collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0044] The use of crosshairs and / or shading in the accompanying drawings is generally provided to clearly define the boundaries between adjacent elements. Therefore, unless specified, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for a particular material, material properties, size, scale, commonalities between elements, or any other characteristics, properties, etc., of the elements. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented in different ways, the specific process sequence may be performed differently than the described sequence. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Moreover, the same reference numerals refer to the same elements.

[0045] When an element, such as a layer, is referred to as being "on," "connected to," or "coupled to" another element or layer, the element may be directly located on, directly connected to, or coupled to the other element or layer, or there may be intermediate elements or layers present. 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 intermediate elements or layers present. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection, with or without intermediate elements. Furthermore, the D1, D2, and D3 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 D1, D2, and D3 axes can be perpendicular to each other, or they 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, for example, 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.

[0046] 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 teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0047] For descriptive purposes, spatial relative terms such as “below,” “under,” “below,” “lower,” “above,” “upper,” “above,” “above,” “above,” and “side” (e.g., as in “sidewall”) may be used herein to describe the relationship between one element and another as shown in the figures. In addition to the orientations depicted in the figures, the spatial relative terms are intended to cover different orientations of the device in use, operation, and / or manufacture. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would then be oriented “above” other elements or features. Thus, the exemplary term “below” can cover both above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and therefore, the spatial relative descriptors used herein should be interpreted accordingly.

[0048] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a” and “the (described)” as used herein are intended to include the plural forms as well. Furthermore, when used herein, the terms “comprising” and / or “including” indicate the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “generally,” “about,” and other similar terms are used as approximations rather than terms of degree, and are therefore used to include inherent deviations in measured, calculated, and / or provided values ​​recognized by those skilled in the art.

[0049] This document describes various exemplary embodiments with reference to cross-sectional and / or exploded views, which are schematic diagrams of idealized exemplary embodiments and / or intermediate structures. Therefore, variations in the shapes shown in the drawings should be expected due to, for example, manufacturing techniques and / or tolerances. Consequently, the exemplary embodiments disclosed herein should not necessarily be construed as limited to the shapes of the specific areas shown, but rather include shape deviations caused, for example, by manufacturing processes. In this way, the areas shown in the drawings may be schematic in nature, and the shapes of these areas may not reflect the actual shapes of the areas of the device, and are therefore not necessarily intended to be limiting.

[0050] 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 as to which this disclosure is a part. Terms such as those defined in common dictionaries shall be interpreted as having 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.

[0051] The first direction axis DR1, the second direction axis DR2, the third direction axis DR3, and the fourth direction axis DR4 are included in Figure 1 As shown in the accompanying drawings, and in this specification, the directions indicated by the first direction axis DR1 to the fourth direction axis DR4 are defined in a relative manner and can be used to indicate other directions.

[0052] In this specification, for ease of explanation, the direction of the third-party axis DR3 is defined as the direction of the image to be provided to the user. Furthermore, as... Figure 1 As shown, the display surface providing the image can be a surface defined by a first directional axis DR1 and a second directional axis DR2.

[0053] Figure 1 This is an exploded perspective view illustrating an electronic device according to an embodiment of the inventive concept. The electronic device ES may be one of a television set, personal computer, laptop computer, personal digital assistant, car navigation system, game console, smartphone, and camera, and may also be implemented using other electronic devices, as long as they do not depart from the inventive concept.

[0054] See Figure 1 The electronic device ES may include a window WM, a display device DM, and a housing HAU. The display device DM may include a display panel DP and a color control component CCM.

[0055] If the surface of the display panel DP is defined as a display surface, the display panel DP may include a display area DA on which an image is displayed and a non-display area NDA on which no image is displayed.

[0056] The window WM may include a transmissive area TA and a light-blocking area BA. The transmissive area TA allows the image provided from the display device DM to be transmitted, while the light-blocking area BA prevents the image from being transmitted. The window WM may be placed on the display device DM to protect the display device DM.

[0057] The housing HAU can be positioned below the display device DM and can be used to house the display device DM. The housing HAU can be configured to expose the top surface of the display device DM while covering other surfaces.

[0058] The display panel DP can be a light-emitting display panel. For example, the display panel DP can be a light-emitting diode (LED) display panel, an organic electroluminescent display panel, or a quantum dot (QD) light-emitting display panel. However, the inventive concept is not limited to these examples.

[0059] The following discussion will focus on organic electroluminescent display panels as examples of display panels DP included in display devices DM, but the inventive concept is not limited to these examples.

[0060] Figure 2 For along Figure 1 A cross-sectional view taken along line I-I' to illustrate a display device according to an embodiment of the present invention. See also Figure 2 The display device DM may include a display panel DP and a color control component CCM disposed on the display panel DP.

[0061] The display panel DP may include a substrate BS, a circuit layer DP-CL and a light-emitting device layer DP-OEL provided on the substrate BS, and the substrate BS, the circuit layer DP-CL and the light-emitting device layer DP-OEL may be stacked sequentially on a third directional axis DR3. In an embodiment, the circuit layer DP-CL may include a plurality of transistors (not shown) for operating the organic electroluminescent device of the light-emitting device layer DP-OEL.

[0062] The color control component (CCM) may include a color control layer (CCL), a color filter layer (CFL), and a base layer (BL). Unlike the illustrated embodiment, the base layer (BL) of the color control component (CCM) may be omitted.

[0063] The substrate layer BL can be an inorganic layer, an organic layer, or a layer made of composite materials. For example, the substrate layer BL can be a glass substrate, a metal substrate, or a plastic substrate. However, the inventive concept is not limited to this example of the substrate layer BL.

[0064] Figure 3 This is a plan view illustrating a portion of a display device according to an embodiment of the present invention. The display device DM may include a non-emissive region NPXA and emissive regions PXA-B, PXA-G, and PXA-R. Figure 3 , Figure 4 , Figures 7 to 10 and Figure 12 Each of the examples illustrates three emitting regions PXA-B, PXA-G, and PXA-R, configured to emit light of their respective different colors. Each of the emitting regions PXA-B, PXA-G, and PXA-R may correspond to a pixel.

[0065] The light-emitting regions PXA-B, PXA-G, and PXA-R may have different areas or the same area, and in the embodiments, the area ratio of the light-emitting regions PXA-B, PXA-G, and PXA-R may be different. Figure 3 The area ratio shown in the image.

[0066] See Figure 3 The first luminescent region PXA-B and the third luminescent region PXA-R can be arranged alternately along the first directional axis DR1 to form a first group of PXG1. The second luminescent region PXA-G can be arranged along the first directional axis DR1 to form a second group of PXG2.

[0067] The first group of PXG1 and the second group of PXG2 can be spaced apart from each other and can be arranged alternately along the second directional axis DR2. The arrangement of the luminescent regions PXA-B, PXA-G, and PXA-R can have a pentile structure, such as... Figure 3 As shown. However, the arrangement of the luminescent regions PXA-B, PXA-G, and PXA-R is not limited to... Figure 3 The structure shown in the image.

[0068] Figure 4 For along Figure 3 A cross-sectional view taken from line II-II' to illustrate the color control component CCM-1 according to an embodiment of the present invention, and Figure 5 To show Figure 4 An enlarged cross-sectional view of a portion of the color control component CCM-1. Figure 4 In the following description of the display device DM shown in the image, referencing the preceding text. Figures 1 to 3 The described elements will be identified by the same reference numerals in the accompanying drawings, without repeating their redundant descriptions.

[0069] A display device according to an embodiment of the present invention may include an absorptive scattering element. Here, the absorptive scattering element may include a scatterer that causes optical scattering, and a light-absorbing portion that has a relatively high optical absorptivity for light within a specific wavelength range (i.e., absorbs a portion of the light within a specific wavelength region).

[0070] A display device according to an embodiment of the present invention may include a dispersive scattering element. Here, the dispersive scattering element may include a material that causes optical scattering or disperses light incident thereon. Light incident on a color control unit having a dispersive scattering element can be scattered by the dispersive scattering element, and this can make it possible to increase the optical conversion efficiency of the color control unit.

[0071] See Figure 4The display device DM may include a display panel DP, and the display panel DP may include a light-emitting diode layer DP-OEL. The light-emitting diode layer DP-OEL can emit light. The light emitted by the light-emitting diode layer DP-OEL may be a first light with a peak wavelength of 500 nm or less. For example, the first light may be ultraviolet (UV) light or blue light.

[0072] Figure 4 and Figure 5 An example of a display device DM is shown, in which a color control layer CCL with an absorptive scattering element SP-A1 is provided. The color control component CCM-1 disposed on the light-emitting layer DP-OEL may include a color filter layer CFL and a color control layer CCL. See also Figure 4 The color control layer (CCL) may include multiple color control units CCP-B, CCP-G, and CCP-R, as well as a separating portion BK, which is disposed between the multiple color control units CCP-B, CCP-G, and CCP-R that are spaced apart from each other.

[0073] The color control layer (CCL) may include a first color control unit (CCP-G), a second color control unit (CCP-R), and a third color control unit (CCP-B). The first color control unit (CCP-G) may include a first emitting element (QD-G), and the second color control unit (CCP-R) may include a second emitting element (QD-R). The first emitting element (QD-G) converts first light emitted from the DP-OEL (distributed light source layer) into second light with a peak wavelength different from that of the first light. The second emitting element (QD-R) converts the first light emitted from the DP-OEL into third light with a peak wavelength different from that of the first light. The third color control unit (CCP-B) may be configured to transmit the first light emitted from the DP-OEL. The first light may have a peak wavelength of 500 nm or less, and the second and third lights may have different peak wavelengths. For example, the first light may be blue, the second light may be green, and the third light may be red.

[0074] Color control units CCP-B, CCP-G, and CCP-R may include an absorptive scattering element SP-A1, which has a relatively high absorption rate for light within a specific wavelength range. Figure 4 An example is shown in which the absorbing scattering element SP-A1 is included in the first color control unit CCP-G. However, in an embodiment, the absorbing scattering element SP-A1 may be included in the second color control unit CCP-R, although not shown. Alternatively, the absorbing scattering element SP-A1 may be included in both the first color control unit CCP-G and the second color control unit CCP-R.

[0075] Figure 5An enlarged cross-sectional view of the color control unit CCP-G is shown, including an absorptive scattering element SP-A1. The color control unit CCP-G may include a substrate resin BR, an absorptive scattering element SP-A1, and an emitting element QD-G. The emitting element QD-G and the absorptive scattering element SP-A1 may be dispersed in the substrate resin BR.

[0076] The optical conversion efficiency and reflectivity of external light can depend on the weight ratio of the absorptive scattering element SP-A1. As the weight ratio of the absorptive scattering element SP-A1 increases, the reflectivity of external light is reduced by the light absorption portion of the absorptive scattering element SP-A1. However, if the weight ratio increases beyond a certain value, the decrease in optical conversion efficiency can be greater than the decrease in external light reflectivity, and in this case, the overall luminous efficiency of the display device will decrease.

[0077] In an embodiment, if the total weight of the color control unit CCP-G is given by the sum of the weights of the base resin BR, the emitting element QD-G, and the absorptive scattering element SP-A1, then the weight ratio of the absorptive scattering element SP-A1 relative to the total weight of the color control unit CCP-G can be in the range of 1 wt% to 10 wt%.

[0078] In cases where the first color control unit CCP-G and the second color control unit CCP-R respectively include absorptive scattering elements SP-A1 and SP-A2, the weight ratio of the absorptive scattering element SP-A1 in the first color control unit CCP-G relative to the total weight of CCP-G can be in the range of 1wt% to 10wt%, and the weight ratio of the absorptive scattering element SP-A2 in the second color control unit CCP-R relative to the total weight of CCP-R can be in the range of 1wt% to 10wt%. The absorptive scattering elements SP-A1 and SP-A2 included in the first color control unit CCP-G and the second color control unit CCP-R respectively can have the same weight ratio or different weight ratios.

[0079] Figure 6 This is an enlarged cross-sectional view illustrating an absorptive scattering element according to an embodiment of the present invention. The absorptive scattering element SP-A may include a scatterer SP disposed at its central portion and at least one light-absorbing portion AB disposed on the surface of the scatterer SP.

[0080] The scatterer SP may include materials that cause optical scattering. For example, the scatterer SP may be inorganic particles. In embodiments, the scatterer SP may be formed from or include at least one of the following: TiO2, ZrO3, Al2O3, MgO, In2O3, ZnO, SnO2, Sb2O3, SiO2, and ITO.

[0081] Depending on the wavelength of the incident light, the transmittance of the light-absorbing portion AB can vary depending on the type or amount of material constituting the light-absorbing portion AB. Compared to light with a peak wavelength of 500 nm or less, the light-absorbing portion AB has a lower transmittance for light with a peak wavelength of 500 nm to 780 nm. In other words, the absorption rate of the light-absorbing portion AB for light with a peak wavelength of 500 nm to 780 nm can be higher than the absorption rate for light with a peak wavelength of 500 nm or less.

[0082] Specifically, the average transmittance of the light-absorbing portion AB for light with peak wavelengths from 380 nm to 440 nm can be equal to or less than 70%, for light with peak wavelengths from 440 nm to 500 nm can be equal to or greater than 70%, and for light with peak wavelengths from 520 nm to 780 nm can be equal to or less than 10%. Average transmittance can mean the average transmittance over a specific wavelength range and can correspond to an arithmetic mean. In this embodiment, the average transmittance of the light-absorbing portion AB can be 0% to 60% in the wavelength range of 380 nm to 440 nm, 70% to 100% in the wavelength range of 440 nm to 500 nm, and 0% to 10% in the wavelength range of 501 nm to 780 nm.

[0083] The light-absorbing portion AB can be configured to absorb green or red light at a higher rate than blue light. The light-absorbing portion AB may include a blue pigment or dye. The blue pigment or dye may be bonded to the surface of the scatterer SP. For example, the light-absorbing portion AB may be formed from or include at least one of the following: phthalocyanine blue (C... 32 H 16 CuN8 and cobalt blue (CoAl2O4). However, the present invention is not limited to these example materials used for the light-absorbing portion AB.

[0084] The absorptive scattering element SP-A can absorb light within a specific wavelength range incident on the display device DM with a high absorptivity, making it possible to reduce the reflectivity of the external light. For example, the absorptive scattering element SP-A may include a light-absorbing portion AB that absorbs light with a peak wavelength in the wavelength range of 520 nm to 780 nm with an absorptivity of 90% or higher, making it possible to reduce the reflectivity of red or green light incident on the display device DM and reflected by the scattering element SP-A.

[0085] See Figure 4The color filter layer CFL may include multiple color filters CF-B, CF-G, and CF-R. A light-shielding portion BM may be provided within the color filter layer CFL to define or delineate the boundaries between adjacent color filters CF-B, CF-G, and CF-R. The color filter layer CFL may further include a buffer layer BFL disposed beneath the multiple color filters CF-B, CF-G, and CF-R, as well as the light-shielding portion BM.

[0086] The light-shielding portion BM prevents light leakage. The light-shielding portion BM can be a black matrix. The light-shielding portion BM can include organic or inorganic light-shielding materials containing black pigments or dyes. However, the inventive concept is not limited to this example of the light-shielding portion BM, and the light-shielding portion BM can also include blue pigments or dyes and can be provided as part of a third color filter (e.g., blue) CF-B.

[0087] Color filters CF-B, CF-G, and CF-R can be configured to transmit light within different wavelength ranges. For example, the first color filter CF-G can transmit light converted from first light to second light by the first emitting element QD-G. The second color filter CF-R can transmit light converted from first light to third light by the second emitting element QD-R. The third color filter CF-B can transmit first light emitted from the light-emitting layer DP-OEL. For example, the first color filter CF-G can transmit green light, the second color filter CF-R can transmit red light, and the third color filter CF-B can transmit blue light.

[0088] Each of the color filters CF-B, CF-G, and CF-R may include a polymeric photosensitive resin and a pigment or dye material. For example, the first color filter CF-G may be a green color filter including a green pigment or green dye, the second color filter CF-R may be a red color filter including a red pigment or red dye, and the third color filter CF-B may be a blue color filter including a blue pigment or blue dye.

[0089] However, the inventive concept is not limited to this example, and the third color filter CF-B may not contain any pigments or dyes. The third color filter CF-B may comprise a polymeric photosensitive resin, but may not contain pigments or dyes. The third color filter CF-B may be transparent. The third color filter CF-B may be formed from a transparent photosensitive resin.

[0090] See Figure 4 The light-emitting device layer DP-OEL may include a pixel defining layer PDL, an organic electroluminescent device OEL, and a thin-film encapsulation layer TFE. The opening may be defined within the pixel defining layer PDL. The pixel defining layer PDL may overlap with the non-light-emitting region NPXA and define or delineate the light-emitting regions PXA-B, PXA-G, and PXA-R. The pixel defining layer PDL may be formed of or include a light-absorbing material.

[0091] An organic electroluminescent device (OEL) may include a first electrode EL1 and a second electrode EL2 opposite to each other, and an organic layer OL disposed between the first electrode EL1 and the second electrode EL2. An opening in the pixel defining layer (PDL) may expose at least a portion of the first electrode EL1. The organic layer OL may include a hole transport region, a light-emitting layer, and an electron transport region. The organic layer OL may generate light and emit light to the exterior of the light-emitting device layer (DP-OEL).

[0092] A thin-film encapsulation layer (TFE) can be applied to the organic light-emitting diode (OEL). The TFE seals the OEL, protecting it from moisture and / or oxygen penetration.

[0093] The color control layer (CCL) may further include a cover layer (CPL). The cover layer (CPL) may be disposed below the color control unit (CCP) and the separating portion (BK) and may prevent the penetration of moisture and / or oxygen.

[0094] A color control component according to an embodiment of the present invention may include a color control layer, an absorptive scattering element, and a color filter layer. As an example, the color control component may include a color control layer comprising an absorptive scattering element and a color filter layer disposed on the color control layer. As another example, the color control component may include a color control layer and a color filter layer disposed on the color control layer, and a scattering layer comprising the absorptive scattering element may be disposed between the color control layer and the color filter layer.

[0095] Figure 7 and Figure 8 These are cross-sectional views, each illustrating a color control component according to an embodiment of the concept of the present invention. Figure 7 In one embodiment, the color control component CCM-1a may include an absorptive scattering element SP-A1 provided in the first color control unit CCP-G. Figure 8 In one embodiment, the color control component CCM-1b may include absorbing and scattering elements SP-A1 and SP-A2, respectively provided in the first color control unit CCP-G and the second color control unit CCP-R. In another embodiment, the absorbing and scattering elements may be included in at least one of the first color control unit CCP-G and the second color control unit CCP-R. For example, although not shown, the absorbing and scattering elements may be included only in the second color control unit CCP-R.

[0096] The third color control unit CCP-B may include a diffuse scattering element SP-D that causes optical scattering. The diffuse scattering element SP-D can scatter a first light incident on the third color control unit CCP-B from the light-emitting device layer DP-OEL. The first light may have a peak wavelength of 500 nm or less. For example, the first light may be blue light.

[0097] The dispersive scattering element SP-D may be formed from or include at least one of the following: TiO2, ZrO3, Al2O3, MgO, In2O3, ZnO, SnO2, Sb2O3, SiO2, and ITO. For example, the dispersive scattering element SP-D may be formed from or include the same material as the scatterer SP of the absorptive scattering element SP-A.

[0098] exist Figure 7 In one embodiment, the second color control unit CCP-R, which does not include the absorptive scattering element SP-A1, may include a dispersive scattering element SP-D'. The dispersive scattering element SP-D' may be formed or comprise the same material as the dispersive scattering element SP-D included in the third color control unit CCP-B; or it may be formed or comprise other materials that cause optical scattering. An absorptive scattering element may be provided in at least one of the first color control unit CCP-G and the second color control unit CCP-R, and a dispersive scattering element may be provided in at least one color control unit in which an absorptive scattering element is not provided. The dispersive scattering element in the first color control unit CCP-G or the second color control unit CCP-R may scatter first light incident on the color control unit from the light-emitting layer DP-OEL. Because the first light is scattered, it can be more easily converted into second or third light by the first emitting element QD-G or the second emitting element QD-R, and this makes it possible to reduce light loss.

[0099] for Figure 8 The color control component CCM-1b shown, and the absorbing and scattering elements SP-A1 and SP-A2, can be provided in the first color control unit CCP-G and the second color control unit CCP-R, respectively. The absorbing and scattering elements SP-A1 in the first color control unit CCP-G and SP-A2 in the second color control unit CCP-R can be formed of the same material or can have the same content. However, the inventive concept is not limited to this example, and in embodiments, the absorbing and scattering element SP-A1 in the first color control unit CCP-G may differ from the absorbing and scattering element SP-A2 in the second color control unit CCP-R in at least one aspect of material and content.

[0100] The absorptive scattering elements SP-A1 and SP-A2 in the first color control unit CCP-G and the second color control unit CCP-R have high absorption rates for green or red light. SP-A1 absorbs green light passing through the first color filter CF-G disposed on the first color control unit CCP-G, and SP-A2 absorbs red light passing through the second color filter CF-R disposed on the second color control unit CCP-R. Therefore, most of the external light incident on the color control units CCP-G and CCP-R through the color filter layer CFL can be absorbed by the absorptive scattering elements SP-A1 and SP-A2, making it possible to reduce the reflectivity of external light.

[0101] Figure 9 and Figure 10 These are cross-sectional views, each illustrating a color control component according to an embodiment of the present invention. Color control components CCM-2 and CCM-2a according to an embodiment of the present invention may include a scattering layer SPL, the scattering layer SPL including an absorptive scattering element SP-A3. Hereinafter, for reference... Figure 9 and Figure 10 The described color control component, see reference. Figures 1 to 8 The described elements will be identified by the same reference numerals in the accompanying drawings, without repeating their redundant descriptions.

[0102] The scattering layer SPL may include an absorptive scattering element SP-A3. The absorptive scattering element SP-A3 can absorb a high proportion of light with peak wavelengths in the range of 520 nm to 780 nm. For example, the absorptive scattering element SP-A3 can be configured such that its transmittance for green or red light is lower than its transmittance for blue light. Therefore, the absorptive scattering element SP-A3 can absorb a high proportion of green or red light, and in particular, can have an optical absorption rate of 90% or higher for green or red light. The absorptive scattering element SP-A3 can also absorb a high proportion of external light within the wavelength range of green or red light passing through color filters CF-G and CF-R, and this makes it possible to reduce the reflectivity of the display device to external light.

[0103] See Figure 10 The absorptive scattering element SP-A3 may be included in the third color control unit CCP-B. The color filter layer CFL in the color control component CCM-2a may include a first color filter CF-G, a second color filter CF-R, and a protective portion PL disposed on the third color control unit CCP-B.

[0104] The protective portion PL can be demarcated from the adjacent color filters CF-G and CF-R by the light-shielding portion BM. The protective portion PL can transmit the first light emitted from the light-emitting layer DP-OEL and visible light with wavelengths longer than the first light. The absorptive scattering element SP-A3 in the third color control unit CCP-B can absorb a high proportion of external light within the wavelength range of green or red light passing through the protective portion PL. The color filter layer CFL may further include a buffer layer BFL disposed between the multiple color filters CF-G, CF-R and the scattering layer SPL. The protective portion PL may be formed of or include the same material as the buffer layer BFL. Therefore, it is possible to reduce the processing time required for setting the third color filter CF-B.

[0105] Figures 4 to 10 The emitting elements QD-G and QD-R can convert first light emitted from the DP-OEL light-emitting layer, having a peak wavelength of 500 nm or less, into light with a different peak wavelength. The first emitting element QD-G can convert the first light into second light with a different wavelength. The second emitting element QD-R can convert the first light into third light with a different wavelength. For example, the second light can be green light, and the third light can be red light.

[0106] The emitting elements QD-G and QD-R can be phosphors. The phosphors serving as emitting elements QD-G and QD-R can be inorganic phosphors. The first emitting element QD-G can be a green phosphor and the second emitting element QD-R can be a red phosphor.

[0107] For example, a green phosphor may be at least one selected from the group consisting of: YBO3:Ce 3+ ,Tb 3+ ,BaMgAl 10 O 17 Eu 2+ ,Mn 2+ ,(Sr,Ca,Ba)(Al,Ga)2S4:Eu 2+ ;ZnS:Cu,Al,Ca8Mg(SiO4)4Cl2:Eu 2+ ,Mn 2+ Ba2SiO4:Eu 2+ (Ba,Sr)2SiO4:Eu 2+ Ba2(Mg,Zn)Si2O7:Eu 2+ (Ba,Sr)Al2O4:Eu 2+ ,Sr2Si3O8.2SrCl2:Eu 2+ .

[0108] The red phosphor may be at least one selected from the group consisting of: (Sr,Ca,Ba,Mg)P₂O₇:Eu 2+ ,Mn 2 + ,CaLa2S4:Ce 3+ ;SrY2S4:Eu 2+ ,(Ca,Sr)S:Eu 2+ ,SrS:Eu 2+ Y2O3:Eu 3+ ,Bi 3+ ;YVO4:Eu 3+ ,Bi 3+ ;Y2O2S:Eu 3+ ,Bi 3+ ;Y2O2S:Eu 3+ .

[0109] The emitting elements QD-G and QD-R can be quantum dots. Quantum dots can be particles that convert the wavelength of light incident upon them. The nucleus of the quantum dot can be formed of or include materials selected from the group consisting of: Group II-VI compounds, Group III-VI compounds, Group III-V compounds, Group IV-VI compounds, Group IV elements or compounds, Group I-III-IV compounds, and any combination thereof.

[0110] Group II-VI compounds may be selected from the group consisting of: binary compounds (e.g., including CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, and MgS), mixtures of binary compounds, and ternary compounds (e.g., including CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, Cd...). ZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe and MgZnS), mixtures of ternary compounds, quaternary compounds (e.g., including CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe), and mixtures of quaternary compounds.

[0111] III-VI compounds may include binary compounds (e.g., In2S3 and In2Se3), ternary compounds (e.g., InGaS3 and InGaSe3), or any combination thereof.

[0112] III-V group compounds may be selected from the group consisting of: binary compounds (e.g., including GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb), mixtures of binary compounds, ternary compounds (e.g., including GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, and InPSb), mixtures of ternary compounds, quaternary compounds (e.g., including GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb), and mixtures of quaternary compounds.

[0113] Like InZnP, III-V semiconductor compounds may further include group II metals.

[0114] Group IV-VI compounds may be selected from the group consisting of: binary compounds (e.g., including SnS, SnSe, SnTe, PbS, PbSe, and PbTe), mixtures of binary compounds, ternary compounds (e.g., including SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, and SnPbTe), mixtures of ternary compounds, quaternary compounds (e.g., including SnPbSSe, SnPbSeTe, and SnPbSTe), and mixtures of quaternary compounds. Group IV elements may be selected from the group consisting of: Si, Ge, and mixtures thereof. Group IV compounds may include binary compounds selected from the group consisting of: SiC, SiGe, and mixtures thereof.

[0115] Group I-III-VI semiconductor compounds may include ternary compounds (e.g., AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, and AgAlO2) or any combination thereof.

[0116] Here, binary, ternary, or quaternary compounds can have a uniform concentration throughout the particle, or they can have a spatially varying concentration distribution within each particle.

[0117] Quantum dots can have a core-shell structure comprising a core and a shell surrounding the core. In one embodiment, a quantum dot can have a core-shell structure in which the quantum dot is surrounded by another quantum dot. At the interface between the core and the shell, the elements contained in the shell can have a concentration gradient that decreases in the central direction.

[0118] In some embodiments, each quantum dot may have a core-shell structure, comprising a core containing the aforementioned nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer, preventing alteration of the core's chemical properties and maintaining its semiconductor properties, and / or may serve as a charging layer, allowing the quantum dot to exhibit electrophoretic properties. The shell may be monolayer or multilayer. At the interface between the core and shell, the elemental concentration contained within the shell may have a concentration gradient that decreases in the central direction. For example, the shell of the quantum dot may be formed of or comprise of oxide compounds of metallic or nonmetallic elements, semiconductor compounds, or any combination thereof.

[0119] For example, oxide compounds used for the metal or non-metal components of the shell may include binary compounds (e.g., SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, and NiO) and ternary compounds (e.g., MgAl2O4, CoFe2O4, NiFe2O4, and CoMn2O4), but the inventive concept is not limited to these examples.

[0120] Additionally, the 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, but the inventive concept is not limited to these examples.

[0121] Each quantum dot can have an emission wavelength spectrum with a full width at half maximum (FWHM) of less than about 45 nm (particularly less than about 40 nm or even more particularly less than about 30 nm), which makes it possible to achieve improved color purity or color reproduction properties. Furthermore, quantum dots can emit light radially (i.e., in all directions), thus enabling improved viewing angle properties.

[0122] In one embodiment, the quantum dots may be spherical, conical, multi-armed, or cubic nanoparticles. In another embodiment, the quantum dots may be nanotubes, nanowires, nanofibers, or nanoplate-shaped particles, but the inventive concept is not limited to these examples.

[0123] The wavelength or color of light emitted from a quantum dot can be determined by the particle size of the quantum dot. Therefore, by providing quantum dots of various sizes, it is possible to achieve various colors (e.g., red and green). The smaller the particle size of the quantum dot, the shorter the wavelength of the light emitted from the quantum dot. 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.

[0124] Table 1 below shows the variations in efficiency and reflectivity of the green and red control units, which include absorbing scattering elements. In the embodiments shown in Table 1, the contents of absorbing scattering elements and quantum dots in the green control unit are 4.3 wt% and 51 wt%, respectively, relative to the total weight of the green control unit, and the contents of absorbing scattering elements and quantum dots in the red control unit are 4.0 wt% and 36 wt%, respectively, relative to the total weight of the red control unit. The remaining weight in each color control unit is the weight of the base resin.

[0125] Table 1 below shows the changes in efficiency, reflectivity, and efficiency relative to equivalent reflectivity, which are caused by the absorptive scattering element. The efficiency and reflectivity are set to 100% when the scattering element TiO2 without light absorption is included in the color control unit, and the changes in efficiency and reflectivity are obtained based on this.

[0126] [Table 1]

[0127]

[0128]

[0129] Referring to Table 1, when the efficiency and reflectance values ​​in the comparative examples are given as 100%, the efficiency values ​​of the green and red control units, including the absorbing scattering element, decrease to 84.9% and 75.3%, respectively. However, the reflectance values ​​to external light decrease to 46.6% and 48.0%, respectively, with the decrease exceeding the decrease in efficiency. Therefore, for color control units including scattering elements without light absorption, the reflectance of external light, rather than the efficiency, increases significantly. Conversely, for color control units including absorbing scattering elements with light absorption, the efficiency decreases, but because the decrease in external light reflectance is greater than the decrease in efficiency, the overall luminous efficiency can increase.

[0130] When the efficiency of the TiO2 scattering element without light absorption is included in the color control unit, the efficiency relative to the equivalent reflectance is set to 100%. Based on this, the change in efficiency relative to the equivalent reflectance is obtained. To compare the change in total luminous efficiency caused by the reduction in reflectance, the change in efficiency relative to the equivalent reflectance can be considered. Since the reflectance of external light is reduced by the absorptive scattering element, the total luminous efficiency increases to 125% in the green control unit and to 109% in the red control unit. From this result, it can be predicted that the total luminous efficiency of a panel that provides not only green and red control units with absorptive scattering elements, but also blue control units with dispersive scattering elements will increase to 110%.

[0131] The luminous efficiency of a display device can depend on optical conversion efficiency and the reflectivity of external light, and in embodiments, both optical conversion efficiency and external light reflectivity can be reduced by absorptive scattering elements. However, since the reduction in external light reflectivity is greater than the reduction in optical conversion efficiency caused by absorptive scattering elements, the display device according to embodiments of the present invention can have improved luminous efficiency.

[0132] Figure 11 and Figure 12 These are cross-sectional views of embodiments according to the present invention, each showing a display device having an absorptive scattering element. Figure 11 and Figure 12 The following descriptions of the display devices DM-1 and DM-2 shown in the document refer to... Figures 1 to 10 The described elements will be identified by the same reference numerals, without repeating any redundant descriptions.

[0133] See Figure 11 The color control component CCM-3 of the display device DM-1 may include a first color filter CF1, a color control unit CCP, and a second color filter CF2. The first color filter CF1, the color control unit CCP, and the second color filter CF2 may be stacked sequentially in the direction of the third directional axis DR3.

[0134] The color control component CCM-3 may include a plurality of first color filters CF1 disposed on the display panel DP, spaced apart from each other along a first directional axis DR1. The first electrode EL1 of each organic electroluminescent device OEL in the light-emitting device layer DP-OEL may overlap with a corresponding one of the first color filters CF1.

[0135] The first color filter CF1 can be configured to transmit light within a specific wavelength range. Specifically, the first color filter CF1 can be configured to transmit first light emitted from the DP-OEL light-emitting layer. For example, the first light can be blue light. The first color filter CF1 can transmit blue light emitted from the DP-OEL light-emitting layer, but can absorb light in a wavelength range different from blue light, and this makes it possible to increase the color purity of the blue light.

[0136] Color control component CCM-3 may include color control units CCP-B, CCP-G, and CCP-R, and absorptive scattering elements SP-A1 and SP-A2 may be included in at least one of the first color control unit CCP-G and the second color control unit CCP-R. The third color control unit CCP-B may include a dispersive scattering element SP-D. Each of the first color control unit CCP-B, the second color control unit CCP-G, and the third color control unit CCP-R may be disposed on the first color filter CF1.

[0137] The color control component CCM-3 may include a second color filter CF2. The second color filter CF2 may overlap with the first color control unit CCP-G and the second color control unit CCP-R, and the second color filter CF2 may expose the top surface TS of the third color control unit CCP-B. Blue light passing through the third color control unit CCP-B may not be absorbed by the second color filter CF2 and may be emitted to the outside of the display device DM-1.

[0138] In this embodiment, the second color filter CF2 can transmit green and red light and block blue light. The second color filter CF2 can be a yellow color filter. The second color filter CF2 can absorb blue light, which is the complementary color of yellow, and can prevent blue light transmission. External light within the wavelength range of green and red light passing through the second color filter CF2 can be absorbed by the absorptive scattering elements SP-A1 and SP-A2, thus reducing the reflectivity of external light.

[0139] See Figure 12 The color control component CCM-4 of the display device DM-2 may include a first color filter CF-G, a second color filter CF-R, and a third color filter CF-B', as well as a first color control unit CCP-G, a second color control unit CCP-R, and a third color control unit CCP-B.

[0140] The color control component CCM-4 may include color control units CCP-B, CCP-G, and CCP-R, and the absorptive scattering elements SP-A1 and SP-A2 may be included in at least one of the first color control unit CCP-G and the second color control unit CCP-R. The third color control unit CCP-B may include a dispersive scattering element SP-D.

[0141] The third color filter CF-B' may include a filter portion BP1 that substantially functions as a color filter and a light-shielding portion BP2 that functions as a light-shielding pattern. In an embodiment, the filter portion BP1 and the light-shielding portion BP2 may be provided as a single object.

[0142] In a display device according to an embodiment of the present invention, an absorptive scattering element may be provided in a color control unit, or a scattering layer having an absorptive scattering element may be disposed on the color control unit. The light-absorbing portion in the absorptive scattering element can absorb a portion of external light supplied from the outside of the display device and within the wavelength range of green or red light at a high ratio, and this makes it possible to reduce the reflectivity of the display device to external light.

[0143] According to embodiments of the present invention, an absorptive scattering element can be provided to reduce the reflectivity of external light.

[0144] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from the description. Therefore, the inventive concept is not limited to these embodiments, but is limited to the broader scope of the appended claims and various obvious modifications and equivalent arrangements, which will be apparent to those skilled in the art.

Claims

1. A display device, comprising: A light-emitting device layer that emits first light with a peak wavelength of 500 nm or less; A color control layer is disposed on the light-emitting device layer, the color control layer including an emitting element that converts the first light; A color filter layer is disposed on the color control layer; as well as An absorptive scattering element is provided in or on the color control layer. The absorptive scattering element includes a light-absorbing portion, in which the absorption rate of green or red light is greater than the absorption rate of the first light.

2. The display device of claim 1, wherein the light-absorbing portion has an average transmittance of 70% or higher for light with a peak wavelength of 440 nm to 500 nm, and an average transmittance of 10% or lower for light with a peak wavelength of 520 nm to 780 nm.

3. The display device of claim 1, wherein the light-absorbing portion comprises at least one of blue pigment and blue dye.

4. The display device as claimed in claim 1, wherein: The color control layer includes a color control unit, which includes the emitting element and the absorptive scattering element; and The weight ratio of the absorptive scattering element relative to the total weight of the color control unit is in the range of 1 wt% to 10 wt%.

5. The display device as claimed in claim 1, wherein: The absorptive scattering element includes a central portion having a scatterer; and The light-absorbing portion is disposed on the surface of the central portion.

6. The display device as claimed in claim 1, wherein: The color control layer includes: A first color control unit includes a first emitting element that converts the first light into a second light, the second light having a peak wavelength different from that of the first light; and The second color control unit includes a second emitting element that converts the first light into a third light, the third light having a peak wavelength different from that of the first light; and The absorptive scattering element is provided in at least one of the first color control unit and the second color control unit.

7. The display device of claim 6, wherein one of the first color control unit and the second color control unit includes the absorptive scattering element, and the other includes a dispersive scattering element, the dispersive scattering element including at least one selected from TiO2, ZrO3, Al2O3, MgO, In2O3, ZnO, SnO2, Sb2O3, SiO2 and ITO.

8. The display device of claim 1, further comprising a scattering layer disposed between the color control layer and the color filter layer. The scattering layer includes the absorptive scattering element.

9. The display device of claim 8, wherein the color control layer comprises: A first color control unit includes a first emitting element that converts the first light into a second light, the second light having a peak wavelength different from that of the first light; The second color control unit includes a second emitting element that converts the first light into a third light, the third light having a peak wavelength different from that of the first light; as well as The third color control unit is configured to transmit the first light.

10. The display device of claim 9, wherein the third color control unit further includes the absorptive scattering element.

Images