Display panel

Abstract

Embodiments of the present disclosure relate to a display panel including a base substrate in which a pixel area and a peripheral area adjacent to the pixel area are defined, a light emitting element positioned on the base substrate to overlap the pixel area and configured to generate first light, a light control layer on the light emitting element, a color filter layer on the light control layer, and a cover layer contacting at least the light control layer and including silicon oxynitride, and the cover layer containing 34 at% to 41 at% of oxygen and 18 at% to 25 at% of nitrogen. The light emitting efficiency of the display panel can be improved while maintaining the durability of the display panel.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0004068, filed on January 13, 2020, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] An aspect of the embodiments of this disclosure relates to a display panel. Background Technology

[0004] Display panels include transmissive display panels that selectively transmit source light generated from a light source and luminescent display panels that generate source light within the display panel itself. Display panels can include different types of color control layers depending on the pixels to produce color images. Color control layers can transmit only a portion of the wavelength range of the source light or convert the color of the source light. Some color control layers can change the properties of light without converting the color of the source light. Summary of the Invention

[0005] According to one aspect of the embodiments of the present disclosure, a display panel is provided that has increased brightness due to improved pixel integration and improved reliability and mass production capability. According to another aspect of the embodiments of the present disclosure, a display panel is provided that has improved durability and luminous efficiency.

[0006] According to another aspect of the embodiments of the present disclosure, a display panel is provided, the display panel including a protective layer capable of protecting luminescent materials included in a light control layer without reducing luminous efficiency.

[0007] According to one or more embodiments, a display panel includes: a substrate, a pixel region and a peripheral region adjacent to the pixel region defined in the substrate; a light-emitting element positioned on the substrate to overlap with the pixel region and configured to generate a first light; a light control layer on the light-emitting element; a color filter layer on the light control layer; and a cover layer that at least contacts the light control layer and includes silicon oxynitride (SiON), wherein the cover layer contains about 34 at% to about 41 at% oxygen and about 18 at% to about 25 at% nitrogen.

[0008] The cover layer may include a first cover layer between the light-emitting element and the color filter layer.

[0009] The cover layer may further include a second cover layer between the light-emitting element and the light control layer.

[0010] The coating may have a refractive index of approximately 1.6 to approximately 1.7.

[0011] The cover layer may include a first layer and a second layer having a density greater than that of the first layer.

[0012] The light control layer may include a first light conversion unit that converts the first light into a second light, a second light conversion unit that converts the first light into a third light, and a transmission unit that transmits the first light.

[0013] The color filter layer may include: a first color filter that overlaps with the first light conversion portion on a plane to transmit the second light; a second color filter that overlaps with the second light conversion portion on a plane to transmit the third light; and a third color filter that overlaps with the transmission portion on a plane to transmit the first light.

[0014] The height of the transmissive portion can be greater than the height of the first light conversion portion and the height of the second light conversion portion.

[0015] The light control layer may further include partition walls positioned between the first light conversion section, the second light conversion section, and the transmission section.

[0016] The optical control layer may include multiple quantum dots.

[0017] The display panel may also include an encapsulation member on the light-emitting element and comprising an inorganic layer at the outermost portion, and the light control layer may contact the inorganic layer.

[0018] The display panel may also include a filler layer between the encapsulation member and the light control layer.

[0019] The cover layer can contact the upper and lower surfaces of the light control layer.

[0020] The first light may be light with a wavelength of about 410 nm to about 480 nm, the second light may be light with a wavelength of about 500 nm to about 570 nm, and the third light may be light with a wavelength of about 625 nm to about 675 nm.

[0021] The display panel may further include: a pixel defining layer on the substrate and including a plurality of openings corresponding to the pixel regions defined in the pixel defining layer, and the light-emitting element may be positioned in the plurality of openings.

[0022] According to one or more embodiments, a display panel includes: a substrate, a pixel region and a peripheral region adjacent to the pixel region defined in the substrate; a light-emitting element positioned on the substrate to overlap with the pixel region; a light control layer on the light-emitting element; a color filter layer on the light control layer; and a first cover layer between the light control layer and the color filter layer and comprising silicon oxynitride (SiON), wherein the first cover layer has a refractive index of about 1.6 to about 1.7.

[0023] The display panel may further include a second cover layer between the light-emitting element and the light control layer, wherein the second cover layer may include silicon nitride (SiN). x ).

[0024] The first coating may include approximately 34 at% to approximately 41 at% oxygen and approximately 18 at% to approximately 25 at% nitrogen.

[0025] The first cover layer can contact the upper surface of the light control layer.

[0026] The first cover layer may include a first layer and a second layer having a density greater than that of the first layer. Attached Figure Description

[0027] The accompanying drawings are included to provide a further understanding of the inventive concept, and are incorporated in and constitute a part of this specification. The drawings illustrate some exemplary embodiments of the inventive concept and, together with the description, serve to explain the principles of the inventive concept. In the drawings:

[0028] Figure 1 This is a perspective view of a display device according to an embodiment of the concept of the present invention;

[0029] Figure 2 This is a cross-sectional view of a display device according to an embodiment of the present invention;

[0030] Figure 3 This is a plan view of a display panel according to an embodiment of the concept of the present invention;

[0031] Figure 4 This is a plan view of the pixel area of ​​a display panel according to an embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of a display panel according to an embodiment of the present invention;

[0033] Figure 6 yes Figure 5 An enlarged cross-sectional view of region "A";

[0034] Figure 7 , Figure 8 and Figure 9 This is a cross-sectional view of a display panel according to some embodiments of the present invention;

[0035] Figure 10A and Figure 10B This is a graph showing the variation of the external quantum efficiency of the display panel with respect to storage time at room temperature for some examples and comparative examples;

[0036] Figure 11A , Figure 11B and Figure 11C This is a cross-sectional view schematically illustrating a portion of the structure of a display panel according to some embodiments of the present invention;

[0037] Figure 12 These are photomicrographs of a portion of the display panel structure according to an embodiment of the present invention; and

[0038] Figure 13A and Figure 13B These photos were obtained by performing a durability assessment on some example and comparative example display panels. Detailed Implementation

[0039] In this document, some embodiments of the inventive concept will be described with reference to the accompanying drawings. However, it will be understood that the invention is not intended to be limited to the specific forms set forth herein, and all modifications, equivalents, and substitutions contained within the technical scope and spirit of the invention are included. In this disclosure, when an element (or region, layer, portion, etc.) is referred to as being “on”, “connected to”, or “coupled to” another element, it means that the element may be directly on, directly connected to, or directly coupled to the other element, or that one or more third elements may be disposed between the element and the other element.

[0040] The same reference numerals denote the same elements. Additionally, in the accompanying drawings, the thickness, scale, and dimensions of elements may be exaggerated for the purpose of effectively describing the technical content. The term "and / or" includes all combinations of one or more associated constructions.

[0041] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. For example, a first element may be referred to as a second element without departing from the scope of exemplary embodiments of the inventive concept, and similarly, a second element may be referred to as a first element. Unless the context clearly indicates otherwise, singular terms may include plural forms.

[0042] Furthermore, terms such as "below," "under," "above," and "above" are used to describe the relationships of the structures shown in the accompanying drawings. These terms are used as relative concepts and refer to the directions indicated in the drawings.

[0043] It should be understood that the terms “comprising,” “including,” or “having” are intended to indicate the presence of the stated features, integrals, steps, operations, elements, components, or combinations thereof in this disclosure, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0044] Unless otherwise defined, all terms used herein (including technical or scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the inventive concept pertains. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the same meaning as in the context of the relevant field and shall not be interpreted as having an idealized or overly formal meaning.

[0045] This document will describe a display device and a display panel included in the display device, according to embodiments of the present invention.

[0046] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention; and Figure 2 This is a cross-sectional view of a display device according to an embodiment of the present invention.

[0047] like Figure 1 As shown, the display device DD can display an image IMG via the display surface IS. The display surface IS is parallel to the surface defined by the first direction DR1 and the second direction DR2. The normal direction of the display surface IS, that is, the thickness direction of the display device DD, is represented by the third direction DR3.

[0048] The front (or upper) and rear (or lower) surfaces of each of the components or units described below are separated in a third direction DR3. However, the first direction DR1, the second direction DR2, and the third direction DR3 shown in the embodiments are merely examples, and this disclosure is not limited thereto.

[0049] In the embodiments of the present invention, a display device DD having a flat display surface is shown, but the embodiments are not limited thereto. The display device DD may also include a curved display surface. The display device DD may include a three-dimensional display surface. The three-dimensional display surface may include multiple display areas indicating different directions, and may include, for example, a polygonal columnar display surface.

[0050] The display device DD according to an embodiment may be a rigid display device. However, the embodiments of the present invention are not limited thereto, and the display device DD according to an embodiment of the present invention may be a flexible display device DD. The flexible display device DD may include a foldable display device or a bendable display device with partially bent portions.

[0051] In this embodiment, a display device DD applicable to a mobile phone terminal is shown as an example. Although not shown, electronic modules, camera modules, and power modules mounted on the motherboard can be housed together with the display device DD in a bracket / housing to form a mobile phone terminal. However, the display device DD according to embodiments of the present invention can be used not only for large-sized electronic devices such as televisions and monitors, but also for small and medium-sized electronic devices such as tablet computers, car navigation units, game consoles, and smartwatches.

[0052] like Figure 1 As shown, the display surface IS includes an image region DD-DA on which the image IMG is displayed, and a border region DD-NDA adjacent to the image region DD-DA. The border region DD-NDA is the area where no image is displayed. Figure 1 The image shown is an example of an icon image as an IMG image.

[0053] like Figure 1 As shown, the image region DD-DA can have a substantially rectangular shape. The term "substantially rectangular shape" refers not only to a rectangular shape in the mathematical sense, but also to a rectangular shape in the vertex region (or corner region) that does not define vertices but defines curved boundaries.

[0054] The border region DD-NDA may surround the image region DD-DA. However, embodiments of the present invention are not limited thereto, and the image region DD-DA and the border region DD-NDA may be configured with different shapes. For example, the border region DD-NDA may be located on only one side of the image region DD-DA. Depending on the combination of the display device DD and other components of the electronic device, the border region DD-NDA may not be exposed to the outside.

[0055] Figure 2 This is a cross-sectional view of a display device according to an embodiment of the present invention. Figure 2 Show along Figure 1 The cross section defined by the first direction DR1 and the third direction DR3, intercepted by line I-I'. Figure 2 The stacked structure of the functional panels and / or functional units that make up the display device DD is shown in a simplified manner.

[0056] The display device DD according to an embodiment of the present invention may include a protective unit, a display panel, an input detection sensor, an anti-reflective unit, and a window. Some components of the protective unit, display panel, input detection sensor, and anti-reflective unit may be formed by a continuous process, or some components may be joined together by adhesive members. As an example, Figure 2 The optically transparent adhesive OCA is shown as an adhesive component. The adhesive components described below may include typical adhesive materials or bonding agents. In embodiments of the inventive concept, any one of the protective unit, anti-reflective unit, and input detection sensor may be replaced by another element or may be omitted.

[0057] exist Figure 2 In this context, the element formed by a continuous process with another element among the protection unit, input detection sensor, and anti-reflective unit is called a "layer." The element joined to another element by an adhesive member among the protection unit, input detection sensor, and anti-reflective unit is called a "panel." A panel includes a substrate layer providing a substrate surface, such as a resin film, composite film, or glass substrate; however, the substrate layer may be omitted in the context of a "layer." In other words, the unit referred to as a "layer" is disposed on the substrate surface provided by another unit.

[0058] Depending on the presence or absence of the substrate layer, the protection unit, input detection sensor, and anti-reflection unit can be referred to as the protection panel, input detection panel, and anti-reflection panel, or the protection layer, input detection layer, and anti-reflection layer.

[0059] like Figure 2 As shown, in an embodiment, the display device DD may include a protective panel PP, a display panel DP, an input sensing layer ISL, an anti-reflective panel RPP, and a window WP. In an embodiment, the input sensing layer ISL is directly disposed on the display panel DP. In the description, "element B is directly disposed on element A" means that no adhesive layer / adhesive member is disposed between element A and element B. After element A is formed, element B can be formed on the substrate surface provided by element A through a continuous process.

[0060] The display module DM can be defined as including the display panel DP and the input sensing layer ISL directly disposed on the display panel DP. The optically clear adhesive OCA can be disposed between the protective panel PP and the display module DM, between the display module DM and the anti-reflective panel RPP, and between the anti-reflective panel RPP and the window WP.

[0061] The display panel DP generates an image, and the input sensing layer ISL obtains the coordinate information of external inputs (e.g., touch events). A protective panel PP is disposed under the display module DM to protect the display module DM from external impacts. In an embodiment, the protective panel PP can be replaced by a protective layer. That is, the protective layer can be directly disposed under the display module DM.

[0062] In one embodiment, the protective panel PP may include a synthetic resin film or a metal plate. In another embodiment, the protective panel PP may have a multilayer structure comprising multiple synthetic resin films and / or multiple metal plates.

[0063] The display panel DP according to embodiments of the present invention can be a light-emitting display panel, but is not particularly limited thereto. For example, the display panel DP can be an organic light-emitting display panel, a quantum dot light-emitting display panel, or a micro light-emitting diode (LED) display panel. Panels are distinguished according to the construction of the light-emitting elements. 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. A micro LED display panel may include micro LED elements and / or nano LED elements that are ultra-miniature light-emitting elements.

[0064] An anti-reflective panel RPP reduces the reflectivity of external light incident from the upper side of the window WP. An anti-reflective panel RPP according to an embodiment of the present invention may include a phase retarder and a polarizer. The phase retarder may be a film type or a liquid crystal coating type, and may include a λ / 2 phase retarder and / or a λ / 4 phase retarder. The polarizer may also be a film type or a liquid crystal coating type. The film type may include an elongated synthetic resin film, and the liquid crystal coating type may include liquid crystals arranged (e.g., in a predetermined arrangement) on a substrate layer. In embodiments, the phase retarder and polarizer may further include a protective film.

[0065] An anti-reflective panel RPP according to an embodiment of the present invention may include a destructive interference structure disposed on a substrate layer. For example, the destructive interference structure may include a first reflective layer and a second reflective layer disposed on different layers. The first reflected light and the second reflected light reflected by the first reflective layer and the second reflective layer, respectively, can destructively interfere with each other, thereby reducing the reflectivity of external light.

[0066] In the display device according to the embodiment, the anti-reflective panel RPP can be omitted and the anti-reflective layer can be disposed on the input sensing layer ISL. Furthermore, the stacking order of the anti-reflective layer and the input sensing layer ISL can be changed. The display device according to the embodiment may include an input sensing panel instead of an input sensing layer ISL. The input sensing panel can be bonded to the display module DM using a transparent adhesive. Furthermore, the stacking order of the input sensing panel and the anti-reflective panel RPP can be changed. The display device according to the embodiment may have a structure in which the input sensing layer, the anti-reflective layer, and the window WP are sequentially stacked on the display panel DP.

[0067] A window WP according to an embodiment of the present invention may include a substrate layer and a light-shielding pattern. The substrate layer may include a glass substrate and / or a synthetic resin film. The substrate layer is not limited to a single layer. The substrate layer may include two or more layers of film bonded by adhesive members.

[0068] The light-shielding pattern partially overlaps with the substrate layer. The light-shielding pattern can be disposed on the rear surface of the substrate layer, and the light-shielding pattern can substantially define the bezel area DD-NDA of the display device DD. The area where no light-shielding pattern is disposed can define the image area DD-DA of the display device DD. When limited to a window WP, the area where the light-shielding pattern is disposed is defined as the light-shielding area of ​​the window WP, and the area where no light-shielding pattern is disposed is defined as the transmissive area of ​​the window WP.

[0069] In embodiments, the light-shielding pattern may have a multi-layered structure. The multi-layered structure may include colored layers and non-colored (e.g., black) light-shielding layers. The colored and non-colored light-shielding layers may be formed by any of deposition, printing, and coating processes. Although not shown separately, in embodiments, the window WP may also include a functional coating disposed on the front surface of the substrate layer. The functional coating may include an anti-fingerprint layer, an anti-reflective layer, a hard coating, etc.

[0070] Figure 3 This is a plan view of a display panel according to an embodiment of the present invention. Figure 3 The diagram illustrates the planar arrangement of signal lines GL1 to GLn and DL1 to DLm, and pixels PX11 to PXnm. Signal lines GL1 to GLn and DL1 to DLm may include multiple gate lines GL1 to GLn and multiple data lines DL1 to DLm.

[0071] Each of pixels PX11 to PXnm is connected to a corresponding gate line among multiple gate lines GL1 to GLn and a corresponding data line among multiple data lines DL1 to DLm. Each of pixels PX11 to PXnm may include a pixel driving circuit and a light-emitting element. Depending on the configuration of the pixel driving circuit, more types of signal lines can be provided in the display panel DP.

[0072] Pixels PX11 to PXnm can be arranged in a matrix, but are not limited to this. In one embodiment, pixels PX11 to PXnm can be arranged in a Pentile arrangement. In another embodiment, pixels PX11 to PXnm can be arranged in a diamond pattern.

[0073] The gate drive circuit (GDC) can be located in the non-display area (NDA). In embodiments, the gate drive circuit (GDC) can be integrated into the display panel (DP) using either an oxide gate driver circuit (OSG) or an amorphous silicon gate driver circuit (ASG) process.

[0074] Figure 4 This is a plan view of the pixel area of ​​a display panel according to an embodiment of the present invention.

[0075] Figure 4 yes Figure 3 The image shows a magnified view of a portion of the display area DA. Figure 4 The main focus is on three pixel regions: Pxa-1, Pxa-2, and Pxa-3. Figure 4 The three pixel regions Pxa-1, Pxa-2, and Pxa-3 shown can be repeatedly set throughout the entire display area DA.

[0076] refer to Figure 4 The outer region NPxa is set around the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3. The outer region NPxa defines the boundaries of the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 to prevent or substantially prevent color mixing between them. Additionally, the outer region NPxa blocks source light to prevent or substantially prevent source light from being provided to the user.

[0077] In this embodiment, a first pixel region Pxa-1, a second pixel region Pxa-2, and a third pixel region Pxa-3 with the same planar area are shown as an example. However, the embodiment is not limited to this, and the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 may have different areas, or at least two or more regions may be different. Although the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 are shown as rectangles with rounded corner areas on a plane, the embodiment is not limited to this. The first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 may take the form of another polygon on a plane, and may take the form of a regular polygon with rounded corner areas.

[0078] One of the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 can provide a first light to the user, another can provide a second light different from the first light, and yet another can provide a third light different from the first and second light. In an embodiment, the first pixel region Pxa-1 can provide red light, the second pixel region Pxa-2 can provide green light, and the third pixel region Pxa-3 can provide blue light. In an embodiment, the first pixel region Pxa-1 can provide light in a wavelength region of approximately 625 nm to approximately 675 nm, the second pixel region Pxa-2 can provide light in a wavelength region of approximately 500 nm to approximately 570 nm, and the third pixel region Pxa-3 can provide light in a wavelength region of approximately 410 nm to approximately 480 nm. In an embodiment, the source light can be blue light, which is the first light. The source light is the first light and can be light in a wavelength region of approximately 410 nm to approximately 480 nm. The source light can be generated in a light source such as a backlight unit or in an element such as a light-emitting diode.

[0079] Figure 5 This is a cross-sectional view of a display panel according to an embodiment of the present invention. Figure 5 Show along Figure 4 The section intercepted by line II-II'; and Figure 6 yes Figure 5 An enlarged cross-sectional view of region "A".

[0080] refer to Figure 5 According to an embodiment, the display panel DP includes a circuit element layer CL disposed on a first substrate SUB1, a light-emitting element layer LEL disposed on the circuit element layer CL, an encapsulation member TFE disposed on the light-emitting element layer LEL, and a fill layer BFL disposed on the encapsulation member TFE. The upper substrate of the display panel DP includes a second substrate SUB2, a color filter layer CFL disposed below the second substrate SUB2, and a light control layer CCL disposed below the color filter layer CFL.

[0081] The first substrate SUB1 and the second substrate SUB2 can each independently be a polymer substrate, a plastic substrate, a glass substrate, a quartz substrate, etc. The first substrate SUB1 and the second substrate SUB2 can be transparent insulating substrates. In one embodiment, the first substrate SUB1 and the second substrate SUB2 can each be rigid. In another embodiment, the first substrate SUB1 and the second substrate SUB2 can each be flexible. Figure 5In the present invention, the display panel DP includes a first substrate SUB1 and a second substrate SUB2. However, the embodiments are not limited to this, and in the display panel DP of the embodiments of the present invention, at least one of the first substrate SUB1 and the second substrate SUB2 may be omitted.

[0082] In an embodiment, the display panel DP may include a first light-emitting element overlapping with a first pixel region Pxa-1, a second light-emitting element overlapping with a second pixel region Pxa-2, and a third light-emitting element overlapping with a third pixel region Pxa-3.

[0083] Each of the first light-emitting element, the second light-emitting element, and the third light-emitting element may include a first electrode EL1, a hole transport region HTR, an emitter layer EML, an electron transport region ETR, and a second electrode EL2 stacked sequentially.

[0084] In an embodiment, the emitting layer EML of the first, second, and third light-emitting elements can be a single entity and can be collectively disposed in pixel regions Pxa-1, Pxa-2, and Pxa-3 and the peripheral region NPxa. The emitting layer EML can generate a first light. For example, the emitting layer EML can generate blue light. The first light generated by the emitting layer EML can be light in the wavelength region of approximately 410 nm to approximately 480 nm. Although not shown separately, in an embodiment, the light-emitting elements corresponding to the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 can each have a patterned emitting layer EML, and in this case, the light-emitting elements corresponding to the first pixel region Pxa-1, the second pixel region Pxa-2, and the third pixel region Pxa-3 can generate light of different colors.

[0085] The light-emitting element layer LEL may further include a pixel defining layer PDL. The pixel defining layer PDL may include an organic material. Openings in the pixel defining layer PDL expose at least a portion of the first electrode EL1. The openings in the pixel defining layer PDL may define pixel regions Pxa-1, Pxa-2, and Pxa-3 of a pixel. However, in embodiments, the pixel defining layer PDL may be omitted.

[0086] An encapsulation component TFE is disposed on the light-emitting element layer LEL to seal the light-emitting element layer LEL. In an embodiment, the encapsulation component TFE may include an inorganic film IL disposed at the outermost portion of the encapsulation component TFE. The encapsulation component TFE may also include an organic film OL, or may have a structure in which the inorganic film IL and the organic film OL are alternately repeated. The encapsulation component TFE can protect the light-emitting element layer LEL from moisture / oxygen and can also be used to protect the light-emitting element layer LEL from foreign matter such as dust particles.

[0087] In embodiments, the inorganic film IL can include any material without specific limitations, as long as the material is capable of protecting the light-emitting element layer LEL positioned beneath the inorganic film IL; for example, it can include silicon nitride (SiN). x ), silicon oxynitride (SiON), silicon oxide (SiO) y Titanium oxide (TiO) y ), aluminum oxide (AlO) y In embodiments, the inorganic film IL may include silicon nitride (SiN). x ).

[0088] Organic membranes (OL) can include, but are not particularly limited to, acrylate-based organic materials. Inorganic membranes (IL) can be formed by deposition methods, etc., and organic membranes (OL) can be formed by deposition methods, coating methods, etc.

[0089] Figure 5 An embodiment of the encapsulation component TFE is shown, comprising one organic film OL and one inorganic film IL; however, the embodiments of this disclosure are not limited thereto, and the encapsulation component TFE may include multiple layers of organic films OL and inorganic films IL. For example, the encapsulation component TFE may have two inorganic films IL disposed with one organic film OL located between the two inorganic films IL. In another embodiment, the encapsulation component TFE may have two or more organic films OL and two or more inorganic films IL stacked alternately in multiple layers.

[0090] In this embodiment, the display panel DP may include a light control layer CCL. The light control layer CCL may be disposed on the light-emitting element layer LEL. The light control layer CCL may be disposed on multiple light-emitting elements and may be spaced apart from the encapsulation component TFE, with a filler layer BFL between the light control layer CCL and the encapsulation component TFE.

[0091] The light control layer (CCL) may include a transmissive portion (TP) that transmits first light, a first light conversion portion (CCP1) that converts the first light into second light, and a second light conversion portion (CCP2) that converts the first light into third light. For example, the second light may be green light, and green light may correspond to light in the wavelength region of approximately 500 nm to approximately 570 nm. The third light may be red light and may correspond to light in the wavelength region of approximately 625 nm to approximately 675 nm.

[0092] In this embodiment, the first optical conversion unit CCP1 and the second optical conversion unit CCP2 may include an optical emitter EP (see...). Figure 6 The light emitter EP can be a particle that converts the wavelength of light. In an embodiment, the light emitter EP included in the first light conversion unit CCP1 and the second light conversion unit CCP2 can be a quantum dot.

[0093] Quantum dots are materials that are a few nanometers in size, contain hundreds to thousands of atoms, and exhibit a quantum confinement effect due to their small size and increased energy band gap. When light with a wavelength having an energy higher than the band gap is incident on a quantum dot, the quantum dot absorbs the light and becomes excited, simultaneously emitting light of a specific wavelength and falling back to its ground state. The emitted light of that specific wavelength has a value corresponding to the band gap. By adjusting the size and composition of quantum dots, the luminescence properties caused by the quantum confinement effect can be controlled.

[0094] Group II-VI compounds can be selected from any group consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof. Ternary compounds are selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, and CdZnO. The group consisting of nS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof, and the quaternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0095] Group I-III-VI compounds can be selected from ternary or quaternary compounds. Ternary compounds are selected from the group consisting of AgInS2, CuInS2, AgGaS2, CuGaS2 and mixtures thereof, and quaternary compounds are such as AgInGaS2 and CuInGaS2.

[0096] Group III-V compounds can be selected from any of the following groups: binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof. Ternary compounds are selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb, and mixtures thereof. Quaternary compounds are selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. Group III-V compounds may also include metals from Group II. For example, InZnP can be chosen as a group III-II-V compound.

[0097] Group IV-VI compounds can be selected from any of the groups consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof. Ternary compounds are selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof. Quaternary compounds are selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements can be selected from the group consisting of Si, Ge, and mixtures thereof. Group IV compounds can be binary compounds selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0098] In this context, binary, ternary, or quaternary compounds can exist in the particles at a uniform concentration distribution, or they can exist in the same particles at partially different concentrations. In an embodiment, the quantum dots can have a core-shell structure with one quantum dot surrounding another. The interface between the core and shell can have a concentration gradient where the concentration of the elements present in the shell decreases towards the center.

[0099] In some embodiments, quantum dots may have a core-shell structure as described above, comprising a core having nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to prevent or substantially prevent chemical denaturation of the core, thereby maintaining semiconductor properties, and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. The interface between the core and the shell may have a concentration gradient of elements present in the shell that decreases towards the center. Examples of shells for quantum dots may be metal oxides or non-metal oxides, semiconductor compounds, or combinations thereof.

[0100] For example, the metal oxide or non-metal oxide can be a binary compound such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 and NiO, or a ternary compound such as MgAl2O4, CoFe2O4, NiFe2O4 and CoMn2O4, but the embodiments of the present invention are not limited thereto.

[0101] In addition, the semiconductor compound can be, 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 of the present invention are not limited thereto.

[0102] In embodiments, the quantum dots may have a full width at half maximum (FWHM) of light emission wavelengths of approximately 45 nm or smaller, and in some embodiments approximately 40 nm or smaller, and in others approximately 30 nm or smaller, which can improve color purity or color reproducibility within the aforementioned range. Furthermore, light emitted through such quantum dots is emitted in all directions, thereby improving wide viewing angles.

[0103] Furthermore, the form of quantum dots is not particularly limited, as long as the form of quantum dots is the form commonly used in the field; for example, quantum dots in the form of spheres, cones, multi-arms, cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoparticles, etc. can be used.

[0104] Quantum dots can emit light in colors that can be controlled by their particle size. Therefore, quantum dots can emit various colors of light, such as blue, red, and green. The smaller the particle size of the quantum dots, the shorter the wavelength range of light they can emit. 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. Similarly, the particle size of a quantum dot emitting blue light can be smaller than the particle size of a quantum dot emitting green light.

[0105] In an embodiment, the light control layer CCL may include a matrix resin BR and a light emitter EP (see [link to embodiment]). Figure 6 The light control layer CCL may also include scattering particles SC (see...). Figure 6 The light emitter EP and the scattering particles SC can be included in each of the light conversion section and the transmission section included in the light control layer CCL. However, embodiments of the present invention are not limited thereto, and the light emitter EP and the scattering particles SC can be included in only a portion of the light control layer CCL.

[0106] The optical control layer (CCL) may include multiple optical conversion units CCP1 and CCP2 and a transmission unit TP. In an embodiment, each of the first optical conversion unit CCP1, the second optical conversion unit CCP2, and the transmission unit TP may be configured to be spaced apart from each other in a plane. Each of the first optical conversion unit CCP1, the second optical conversion unit CCP2, and the transmission unit TP may be arranged to be spaced apart from each other in a plane defined by the axis of the first direction DR1 and the axis of the third direction DR3.

[0107] Figure 5 The illustration shows the first light conversion section CCP1, the second light conversion section CCP2, and the transmission section TP having the same area or thickness. However, the embodiment is not limited to this, and each of the first light conversion section CCP1, the second light conversion section CCP2, and the transmission section TP may have a different area or thickness. For example, the transmission section TP may have a smaller area than the first light conversion section CCP1 and the second light conversion section CCP2. The first light conversion section CCP1 may have a larger area than the second light conversion section CCP2 and the transmission section TP.

[0108] A partition wall BP can be disposed between a spaced-apart first light conversion section CCP1 and a spaced-apart second light conversion section CCP2, and between a spaced-apart second light conversion section CCP2 and a transmissive section TP. The partition wall BP can overlap with the peripheral region NPxa in a plane. The partition wall BP can prevent or substantially prevent light leakage and can define the boundary between adjacent light conversion sections CCP1 and CCP2 and the transmissive section TP. In embodiments, the partition wall BP can include organic materials. In embodiments, the partition wall BP can include organic light-shielding materials comprising black pigments or black dyes. The partition wall BP can include hydrophobic organic materials.

[0109] In an embodiment, the color filter layer CFL can be disposed on the light control layer CCL, and can include a first color filter R-CFP, a second color filter G-CFP, a third color filter B-CFP, and a light-shielding pattern BM.

[0110] The first color filter R-CFP, the second color filter G-CFP, and the third color filter B-CFP can be configured to be spaced apart from each other on a plane. (Reference) Figure 5 The first color filter R-CFP, the second color filter G-CFP, and the third color filter B-CFP can be spaced apart from each other along the first direction DR1.

[0111] The first color filter R-CFP can be configured to correspond to the first light conversion unit CCP1, blocking the first and third light rays and transmitting the second light. The second color filter G-CFP can be configured to correspond to the second light conversion unit CCP2, blocking the first and second light rays and transmitting the third light. The third color filter B-CFP can be configured to correspond to the transmission unit TP, blocking the second and third light rays and transmitting the first light. The first color filter R-CFP may include red material, the second color filter G-CFP may include green material, and the third color filter B-CFP may include blue material. Therefore, when the first light provided from the light control layer CCL is transmitted through the color filter layer CFL, the second light can be transmitted in the first pixel region Pxa-1 overlapping with the first color filter R-CFP, the third light can be transmitted in the second pixel region Pxa-2 overlapping with the second color filter G-CFP, and the first light can be transmitted in the third pixel region Pxa-3 overlapping with the third color filter B-CFP. Because the display device DD includes a color filter layer CFL, the reflection of external light can be effectively reduced and color mixing can be prevented or substantially prevented.

[0112] A light-shielding pattern BM is provided corresponding to the peripheral region NPxa. The light-shielding pattern BM can be formed by an organic or inorganic light-shielding material including black pigment or black dye. The light-shielding pattern BM can prevent or substantially prevent light leakage and can define the boundary between adjacent color filters R-CFP, G-CFP, and B-CFP. At least a portion of the light-shielding pattern BM can be provided to overlap with adjacent color filters R-CFP, G-CFP, and B-CFP. The light-shielding pattern BM can be provided on a plane defined by the axis of the first direction DR1 and the axis of the third direction DR3, such that at least a portion of the light-shielding pattern BM overlaps with adjacent color filters R-CFP, G-CFP, and B-CFP in the thickness direction. Figure 5 The light-shielding pattern BM overlaps with all the color filters R-CFP, G-CFP, and B-CFP in the thickness direction, such that the thickness of the light-shielding pattern BM is the same as the thickness of the entire color filter layer CFL. However, embodiments of the present invention are not limited to this, and in embodiments, the thickness of the light-shielding pattern BM may be less than the thickness of the entire color filter layer CFL. In embodiments of the present invention, the light-shielding pattern BM is included in the color filter layer CFL, but embodiments are not limited to this, and the light-shielding pattern BM may be omitted.

[0113] The filler layer BFL can be disposed between the encapsulation component TFE and the light control layer CCL. The filler layer BFL is disposed between the encapsulation component TFE and the light control layer CCL to prevent the light control layer CCL from contacting the encapsulation component TFE and to improve the light extraction efficiency of the display device DD.

[0114] In an embodiment, the filler layer BFL can fill the space between the encapsulation member TFE and the optical control layer CCL. Filling the space between the encapsulation member TFE and the optical control layer CCL means that the filler layer BFL fills the space between the encapsulation member TFE and the optical control layer CCL, and therefore there is no internal space between the encapsulation member TFE and the optical control layer CCL, which can mean that the filler layer BFL contacts the encapsulation member TFE and the optical control layer CCL.

[0115] The filler layer BFL can prevent or substantially prevent the light emitter EP and / or scattering particles SC included in the light control layer CCL from being oxidized by the internal air, and thus can maintain the light extraction efficiency of the display device DD without significant change.

[0116] In an embodiment, the filler layer BFL can be directly disposed on the inorganic film IL disposed at the outermost portion of the encapsulation member TFE. The filler layer BFL may include inorganic binders, organic binders, or liquid crystal compounds, but is not particularly limited thereto.

[0117] Figure 5 An embodiment is shown with a filler layer BFL disposed between the encapsulation member TFE and the light control layer CCL. However, the embodiments disclosed herein are not limited thereto, and in a display device DD according to an embodiment of the present invention, the filler layer BFL may be omitted. In this case, an air layer may be formed between the encapsulation member TFE and the light control layer CCL.

[0118] refer to Figure 5 and Figure 6 According to an embodiment, the display panel DP includes a cover layer CAP that contacts the light control layer CCL. The cover layer CAP may include a first cover layer CAP1 disposed between the light control layer CCL and the color filter layer CFL.

[0119] In an embodiment, the first capping layer CAP1 comprises silicon oxynitride (SiON). In an embodiment, the first capping layer CAP1 comprises approximately 34 at% to approximately 41 at% oxygen and approximately 18 at% to approximately 25 at% nitrogen. In other words, the first capping layer CAP1 comprises approximately 34 at% to approximately 41 at% oxygen atoms relative to all atoms included in the first capping layer CAP1, and comprises approximately 18 at% to approximately 25 at% nitrogen atoms relative to all atoms included in the first capping layer CAP1. In an embodiment, the first capping layer CAP1 may have a refractive index of approximately 1.6 to approximately 1.7.

[0120] The capping layer CAP according to an embodiment may further include a second capping layer CAP2. The second capping layer CAP2 may be disposed between the light control layer CCL and the filler layer BFL. The second capping layer CAP2 may be disposed on the lower surface of the light control layer CCL. In an embodiment, like the first capping layer CAP1, the second capping layer CAP2 may include silicon oxynitride (SiON). However, embodiments of the present invention are not limited thereto, and in some embodiments, the second capping layer CAP2 may include silicon nitride (SiN). x The second capping layer CAP2 may include silicon oxide (SiO2). y Titanium oxide (TiO) y ), aluminum oxide (AlO) y )wait.

[0121] The capping layer CAP can cover at least one surface of the light control layer CCL to protect the light emitter EP included in the light control layer CCL from foreign matter such as oxygen and moisture entering from the outside. The capping layer CAP can contact at least one of the upper and lower surfaces of the light control layer CCL. In an embodiment, the first capping layer CAP1 can contact the upper surface CCL-US of the light control layer CCL to cover the light control layer CCL, and the second capping layer CAP2 can contact the lower surface CCL-LS of the light control layer CCL to cover the light control layer CCL.

[0122] In an embodiment, the light control layer CCL may include a light emitter EP, scattering particles SC, and a matrix resin BR.

[0123] The matrix resin BR is the medium in which the light emitter EP is dispersed, and can be formed from various resin components commonly referred to as binders. However, embodiments of the present invention are not limited thereto, and any medium capable of dispersing the light emitter EP can be called the matrix resin BR, regardless of the name of the medium, its additional functions, and elements. The matrix resin BR can be a polymer resin. For example, the matrix resin BR can be acrylic resin, polyurethane resin, silicone resin, epoxy resin, etc. The matrix resin BR can be a transparent resin.

[0124] The light emitter EP can be a particle that converts the wavelength of light. In an embodiment, the light emitter EP can be a quantum dot.

[0125] A light emitter EP may be included in the light conversion sections CCP1 and CCP2 of the light control layer CCL to function as a particle that converts first light generated from the light-emitting element layer LEL into light of different wavelengths. In an embodiment, the light emitter EP included in the second light conversion section CCP2 may be a quantum dot that converts the first light, which is blue, into a third light, which is green. Although not shown, the light emitter EP included in the first light conversion section CCP1 may be a quantum dot that converts the first light, which is blue, into a second light, which is red. The light emitter EP may be uniformly dispersed in the matrix resin BR.

[0126] The scattering particles SC can be TiO2 or silica-based nanoparticles. The scattering particles SC can scatter light. In another embodiment of the present invention, the scattering particles SC can be omitted. The scattering particles SC can be uniformly dispersed in the matrix resin BR.

[0127] Figure 7 , Figure 8 and Figure 9 These are cross-sectional views of display panels according to some embodiments. In the description of display panels DP-1, DP-2 and DP-3 according to some embodiments of the present invention, the same reference numerals are given to the same elements as described above, and repeated descriptions thereof may be omitted.

[0128] refer to Figure 7 ,and Figure 5 Compared to the display panel DP shown, the display panel DP-1 according to the embodiment has a structure in which the partition wall BP is omitted in the light control layer CCL. Therefore, the second cover layer CAP2' included in the display panel DP-1 can have a structure that covers the side surfaces of the light conversion parts CCP1 and CCP2 and the transmissive part TP, except for the lower surface.

[0129] refer to Figure 8 ,and Figure 5 Compared to the display panel DP shown, the display panel DP-2 according to the embodiment can have a structure that omits the third color filter B-CFP and extends the transmissive portion TP-1. That is, compared to... Figure 5Compared to the display panel DP shown, the display panel DP-2 can have a structure where the transmissive portion TP and the third color filter B-CFP can have a single body to form an extended transmissive portion TP-1. Therefore, the height of the extended transmissive portion TP-1 can be greater than the height of each of the first light conversion portion CCP1 and the second light conversion portion CCP2. Since the transmissive portion TP-1 has the form of extending to the color filter layer CFL, the first cover layer CAP1' can have the form of being curved in the third pixel region Pxa-3 to cover the upper surface of the transmissive portion TP-1.

[0130] refer to Figure 9 ,and Figure 5 Compared to the display panel DP shown, the display panel DP-3 according to the embodiment may have a structure that omits the second substrate SUB2, the filler layer BFL, and the second cover layer CAP2. The display panel DP-3 according to the embodiment may have a structure in which each layer is continuously formed on the substrate SUB1.

[0131] In the display panel DP-3 according to the embodiment, the light control layer CCL can be directly formed on the encapsulation member TFE. Therefore, the encapsulation member TFE can contact the lower surface of the light control layer CCL. The lower surface of the light control layer CCL can contact and be covered by the inorganic film IL, which is disposed at the outermost part of the encapsulation member TFE.

[0132] In the display panels DP, DP-1, DP-2, and DP-3 according to embodiments, the capping layer CAP covering the surface of the light control layer CCL comprises silicon oxynitride (SiON) having a refractive index of approximately 1.6 to approximately 1.7. This protects the light emitter EP included in the light control layer CCL from external contaminants such as oxygen and moisture, and achieves high light efficiency without reduction compared to cases where the capping layer CAP comprises a material with a high refractive index. The capping layer CAP covering the upper surface of the light control layer CCL comprises silicon oxynitride (SiON) having a high refractive index. x In contrast, the capping layer CAP covering the upper surface of the light control layer CCL comprises silicon oxynitride (SiON) with a low refractive index, and the silicon oxynitride film included in the capping layer CAP comprises approximately 34 at% to approximately 41 at% oxygen and approximately 18 at% to approximately 25 at% nitrogen to prevent or substantially prevent the light control layer CCL from being damaged due to defects (such as oxidation) and to prevent or substantially prevent the degradation of the light efficiency of the display panels DP, DP-1, DP-2 and DP-3.

[0133] Figure 10A and Figure 10BThis is a graph showing the variation of the external quantum efficiency of display panels with respect to storage time at room temperature for some examples and comparative examples. Figure 10A This is a diagram illustrating a comparative example of a capping layer (CAP) comprising silicon nitride disposed on the light control layer (CCL); and Figure 10B This diagram illustrates an example of a CAP (Capsule Cap) layer disposed on a light control layer (CCL) comprising silicon oxynitride. Figure 10B In the examples shown, the elemental content ratio of the CAP layer for each example, based on XPS analysis, is shown in Table 1 below.

[0134] [Table 1]

[0135]

[0136]

[0137] refer to Figure 10A and Figure 10B The results, compared with the comparative example display panels with a silicon oxynitride capping layer CAP disposed on the light control layer CCL, confirmed that the example display panels DP, DP-1, DP-2, and DP-3 had higher external quantum efficiencies in all cases: initial storage, storage at room temperature for 144 hours, and storage at room temperature for 336 hours. Therefore, as in the examples, the capping layer CAP disposed on the light control layer CCL comprises silicon oxynitride, and specifically as shown in Table 1, the capping layer CAP comprises approximately 34 at% to approximately 41 at% oxygen and approximately 18 at% to approximately 25 at% nitrogen, thus confirming that display panels DP, DP-1, DP-2, and DP-3 can achieve high light efficiency while effectively blocking foreign matter such as oxygen and moisture from the outside. Furthermore, in the case of the example with a silicon oxynitride capping layer CAP, the Si-ON peaks (900 to 1200 cm⁻¹) were measured according to FT-IR analysis after 500 hours of storage under high temperature and high humidity conditions (85°C / 85% RH). -1 No change in value was observed, thus confirming that a robust capping layer (CAP) can be formed even under high temperature and high humidity conditions.

[0138] Figure 11A , Figure 11B and Figure 11C This is a cross-sectional view schematically illustrating a portion of the display panel structure according to an embodiment of the present invention; and Figure 12 These are photomicrographs of a portion of the display panel structure according to an embodiment of the present invention. Figure 11A , Figure 11B and Figure 11CThe structure of the first cover layers CAP1, CAP1-1, and CAP1-2 disposed on the light control layer CCL in the display panel construction is schematically shown; and Figure 12 This is an enlarged photograph of a portion of the first cover layer CAP1, which is set on the light control layer CCL in the display panel structure.

[0139] refer to Figure 11A , Figure 11B , Figure 11C and Figure 12 In the display panels DP, DP-1, DP-2, and DP-3 according to embodiments, the first cover layers CAP1, CAP1-1, and CAP1-2 may include multiple layers. The first cover layers CAP1, CAP1-1, and CAP1-2 may include a first layer CAP-1 as a lower density layer and a second layer CAP-2 as a higher density layer. The second layer CAP-2 may be disposed above and / or below the first layer CAP-1. In embodiments, as... Figure 11A As shown, the second CAP-2 layer can be disposed above the first CAP-1 layer to be spaced apart from the light control layer CCL. In another embodiment, as... Figure 11B As shown, the second layer CAP-2 can be disposed below the first layer CAP-1 to contact the light control layer CCL. In another embodiment, multiple second layers CAP-21 and CAP-22 can be provided and can be disposed both above and below the first layer CAP-1.

[0140] In one embodiment, a second CAP-2 layer can be formed by forming a first capping layer CAP1, CAP1-1, and CAP1-2 via silicon oxynitride and subsequently forming a high-density film via plasma processing. In another embodiment, the thickness of the second CAP-2 layer can be approximately 6 nm.

[0141] Figure 13A and Figure 13B These are photographs obtained by performing a durability assessment on the display panels of the example and comparison examples. Figure 13A and Figure 13B These are photographs showing whether black spots (BD) are produced on the first overlay of the display panels of the example and comparative examples after storage for 120 hours under high temperature and high humidity conditions (85°C / 85%RH). Figure 13A This is a comparative example where the first capping layer CAP1-RF is not included, and the second layer CAP-2 is a high-density film; and Figure 13B This is an example of a case where the first covering layer CAP1 is comprised of a second layer CAP-2, which is a high-density film.

[0142] In the display panels DP, DP-1, DP-2, and DP-3 according to embodiments, since the first cover layer CAP1 disposed on the light control layer CCL includes a second layer CAP-2 which is a high-density film, display defects such as black spots (BD) will not appear even after long-term storage under high temperature and high humidity conditions. Therefore, the display panels DP, DP-1, DP-2, and DP-3 according to embodiments may include a cover layer CAP with a high-density film on the light control layer CCL to provide display panels DP, DP-1, DP-2, and DP-3 with high durability even under high temperature and high humidity conditions.

[0143] According to one or more embodiments of the present invention, the optical control layer CCL including the optical emitter EP can be protected by the cover layer CAP, and the optical emission efficiency can be maintained at a high level.

[0144] According to one or more embodiments of the present invention, display panels DP, DP-1, DP-2 and DP-3 can be provided that can protect the light emitter EP included in the light control layer CCL even under long-term high temperature and high humidity conditions and can prevent or substantially prevent the reduction of luminous efficiency due to the cover layer CAP.

[0145] Although the inventive concept has been described with reference to some exemplary embodiments thereof, it will be understood that the inventive concept is not limited to these embodiments, but can be modified and altered by those skilled in the art without departing from the spirit and scope of the inventive concept. Therefore, the technical scope of the inventive concept is not intended to be limited to what is set forth in the detailed description of the specification, but is intended to be defined by the spirit and scope of the inventive concept.

Claims

1. A display panel, wherein, The display panel includes: The substrate, the pixel region, and the peripheral region adjacent to the pixel region are defined in the substrate; A light-emitting element is positioned on the substrate to overlap with the pixel region and configured to generate a first light; A light control layer is located on the light-emitting element; Color filter layer, on the light control layer; and A capping layer, at least in contact with the light control layer, and comprising silicon oxynitride. The coating layer contains 34 at% to 41 at% oxygen and 18 at% to 25 at% nitrogen. The covering layer includes a first layer and a second layer having a density greater than that of the first layer.

2. The display panel according to claim 1, wherein, The cover layer includes a first cover layer between the light-emitting element and the color filter layer.

3. The display panel according to claim 2, wherein, The cover layer also includes a second cover layer between the light-emitting element and the light control layer.

4. The display panel according to claim 1, wherein, The coating has a refractive index of 1.6 to 1.

7.

5. The display panel according to claim 1, wherein, The light control layer includes a first light conversion unit that converts the first light into a second light, a second light conversion unit that converts the first light into a third light, and a transmission unit that transmits the first light.

6. The display panel according to claim 5, wherein, The color filter layer includes: A first color filter overlaps with the first light conversion part on a plane to transmit the second light; A second color filter overlaps with the second light conversion section on a plane to transmit the third light; and A third color filter overlaps with the transmissive portion on a plane to transmit the first light.

7. The display panel according to claim 5, wherein, The height of the transmissive portion is greater than the height of the first light conversion portion and the height of the second light conversion portion.

8. The display panel according to claim 5, wherein, The light control layer also includes partition walls positioned between the first light conversion section, the second light conversion section and the transmission section.

9. The display panel according to claim 5, wherein, The first light is light with a wavelength of 410 nm to 480 nm, the second light is light with a wavelength of 500 nm to 570 nm, and the third light is light with a wavelength of 625 nm to 675 nm.

10. The display panel according to claim 1, wherein, The light control layer comprises multiple quantum dots.

11. The display panel according to claim 1, wherein, The display panel also includes an encapsulation component on the light-emitting element, and includes an inorganic layer at the outermost portion. The light control layer is in contact with the inorganic layer.

12. The display panel according to claim 11, wherein, The display panel also includes a filler layer between the encapsulation component and the light control layer.

13. The display panel according to claim 1, wherein, The cover layer contacts the upper and lower surfaces of the light control layer.

14. The display panel according to claim 1, wherein, The display panel further includes: a pixel defining layer, on the substrate and including a plurality of openings defined in the pixel defining layer corresponding to the pixel regions, and The light-emitting element is positioned in the plurality of openings.

15. A display panel, wherein, The display panel includes: The substrate, the pixel region, and the peripheral region adjacent to the pixel region are defined in the substrate; A light-emitting element is positioned on the substrate to overlap with the pixel region; A light control layer is located on the light-emitting element; Color filter layer, on the light control layer; and A first cover layer, located between the light control layer and the color filter layer, comprises silicon oxynitride. The first capping layer has a refractive index of 1.6 to 1.

7. The first covering layer includes a first layer and a second layer having a density greater than that of the first layer.

16. The display panel according to claim 15, wherein, The display panel further includes a second cover layer between the light-emitting element and the light control layer, and the second cover layer includes silicon nitride.

17. The display panel according to claim 15, wherein, The first capping layer comprises 34 at% to 41 at% oxygen and 18 at% to 25 at% nitrogen.

18. The display panel according to claim 15, wherein, The first cover layer contacts the upper surface of the light control layer.

Images