Display device

Abstract

A display device includes: a substrate; the light-emitting device is arranged on the substrate; a color conversion layer disposed on the light emitting device; a color filter layer disposed on the color conversion layer; a first coating layer disposed on the color filter layer and including scattering particles and a dispersion layer in which the scattering particles are dispersed; and a second coating layer disposed on the first coating layer, and the second coating layer has a refractive index smaller than a refractive index of the first coating layer.

Description

Technical Field

[0001] The present disclosure relates to a display device and a method of manufacturing the display device, and more particularly, to a display device providing visual information and a method of manufacturing the display device. Background Art

[0002] As information technology develops, the importance of display devices as a connection medium between users and information is emerging. For example, the use of liquid crystal display ("LCD") devices, organic light emitting display ("OLED") devices, plasma display devices ("PDD"), quantum dot display devices is increasing. The use of display devices such as these is increasing.

[0003] Matte displays reduce light reflection and allow images to be displayed without interference from sunlight or lighting. In matte displays, a matte film or the like may be disposed on top of a display panel to achieve a matte surface texture. Summary of the invention

[0004] The present disclosure may provide a display device with improved display quality.

[0005] The present disclosure may provide a method of manufacturing a display device.

[0006] The display device in the embodiment of the present disclosure includes: a substrate; a light-emitting device, which is arranged on the substrate; a color conversion layer, which is arranged on the light-emitting device; a color filter layer, which is arranged on the color conversion layer; a first coating layer, which is arranged on the color filter layer and includes scattering particles and a dispersion layer, and the scattering particles are dispersed in the dispersion layer; and a second coating layer, which is arranged on the first coating layer, and the second coating layer has a refractive index smaller than the refractive index of the first coating layer.

[0007] In an embodiment, the refractive index of the scattering particles may be different from the refractive index of the dispersion layer.

[0008] In an embodiment, the scattering particles may include at least one of silica particles, hollow silica particles, organic polymer particles, metal oxide particles, metal particles, carbon particles, and zeolite particles.

[0009] In an embodiment, the scattering particles have a size of about 0.2 microns or more and about 2 microns or less.

[0010] In an embodiment, the content of the scattering particles may be about 10 weight percent or more and about 80 weight percent or less.

[0011] In an embodiment, the second coating layer may include a silicon compound having a refractive index less than about 1.5.

[0012] In an embodiment, the second coating layer may include a material having a fluorine content of about 10 percent or more and a molecular weight of about 10,000 or more.

[0013] In an embodiment, the second coating layer may include a material having a hollow silica content of about 10 weight percent or more and about 80 weight percent or less and a molecular weight of about 10,000 or more.

[0014] In an embodiment, the hollow silica particles of the hollow silica content may have a size of about 50 nanometers or more and about 400 nanometers or less.

[0015] In an embodiment, the thickness of the first coating layer may be greater than the thickness of the second coating layer.

[0016] In an embodiment, the second coating layer may have a thickness of about 80 nanometers or more and about 500 nanometers or less.

[0017] In an embodiment, the scattering particles may scatter and reflect specular light.

[0018] In an embodiment, the second coating layer may remove the specularly reflected light via destructive interference.

[0019] The method for manufacturing the display device in an embodiment of the present disclosure includes: forming a light-emitting device, a color conversion layer and a color filter layer in sequence on a substrate; forming a first coating layer including scattering particles and a dispersion layer on the color filter layer, the scattering particles being dispersed in the dispersion layer; and forming a second coating layer having a refractive index smaller than that of the first coating layer on the first coating layer.

[0020] In an embodiment, the scattering particles are formed to have a size of about 0.2 micrometers or more and about 2 micrometers or less.

[0021] In an embodiment, the content of the scattering particles is about 10 weight percent or more and about 80 weight percent or less.

[0022] In an embodiment, the second coating layer may include a silicon compound having a refractive index less than about 1.5.

[0023] In an embodiment, the second coating layer may include a material having a fluorine content of about 10 percent or more and a molecular weight of about 10,000 or more.

[0024] In an embodiment, the second coating layer includes a material having a hollow silica content of about 10 weight percent or more and about 80 weight percent or less and a molecular weight of about 10,000 or more.

[0025] In an embodiment, the second coating layer has a thickness of about 80 nanometers or more and about 500 nanometers or less.

[0026] As described above, in an embodiment, a display device may include: a substrate; a light emitting device disposed on the substrate; a color conversion layer disposed on the light emitting device; a color filter layer disposed on the color conversion layer; a first coating layer disposed on the color filter layer and including scattering particles and a dispersion layer, the scattering particles being dispersed in the dispersion layer; and a second coating layer disposed on the first coating layer, and the second coating layer having a refractive index smaller than that of the first coating layer. Therefore, the reflectivity of the display device to external light can be reduced. In addition, the display quality of the display device can be improved.

[0027] Furthermore, by forming the coating layer in the display device, the manufacturing process of the display device may be simplified and the manufacturing cost may be reduced, compared to a process of attaching an additional member. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Illustrative, non-limiting embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.

[0029] Figure 1 is a plan view of an embodiment of a display device.

[0030] Figure 2 It is along Figure 1 A cross-sectional view taken along line II'.

[0031] Figure 3 It is shown that the Figure 2 Cross-sectional view of a color conversion layer in a display device.

[0032] Figure 4 It is shown that the Figure 2 A cross-sectional view of an embodiment of a coating layer in a display device.

[0033] Figure 5 It is shown that the Figure 2 A cross-sectional view of another embodiment of a coating layer in a display device.

[0034] Figure 6 , Figure 7 and Figure 8 It shows the manufacturing Figure 2 A cross-sectional view of a method for displaying a device. DETAILED DESCRIPTION

[0035] Embodiments of the present disclosure will now be described more fully below with reference to the accompanying drawings in which various embodiments are shown. However, embodiments of the present disclosure may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. The same reference numerals always refer to the same elements.

[0036] It will be understood that when an element is referred to as being "on" another element, the element can be directly on the other element or intervening elements may be present between the element and the other element. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements.

[0037] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, without departing from the teachings herein, the first element, component, region, layer or section discussed below may be referred to as a second element, component, region, layer or section.

[0038] The terms used herein are only for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, unless the content clearly indicates otherwise, the singular forms "one", "one (kind / person)" and "the (the)" are intended to include plural forms including "at least one (kind / person)". "Or" means "and / or". As used herein, the term "and / or" includes any combination and all combinations of one or more associated listed items. It will also be understood that when used in this specification, the term "comprises and / or comprising" or "includes and / or including" indicates the presence of stated features, regions, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, regions, wholes, steps, operations, elements, components and / or their groups.

[0039] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. It will be understood that, in addition to the orientation depicted in the accompanying drawings, relative terms are also intended to cover different orientations of the device. For example, if the device is turned over in one of the multiple drawings, the element described as being on the "lower" side of the other elements will then be positioned as being on the "upper" side of the other elements. Therefore, depending on the specific orientation of the drawings, the exemplary term "lower" can cover both "lower" and "upper" orientations. Similarly, if the device is turned over in one of the multiple drawings, the element described as being "below" or "below" the other elements will then be positioned as being "above" the other elements. Therefore, the exemplary terms "below..." or "below..." can cover both "upper" and "lower" orientations.

[0040] As used herein, "about" or "approximately" includes the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, a term such as "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will also be understood that, unless explicitly defined as such herein, terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technical field and the present disclosure, and should not be interpreted in an idealized or overly formalized sense.

[0042] Figure 1 is a plan view of an embodiment of a display device.

[0043] Reference Figure 1 , the display device 1000 in the embodiment of the present disclosure may include a display area DA and a peripheral area PA. The display area DA may be defined as an area where an image is displayed. The peripheral area PA may be defined as an area where an image is not displayed. The peripheral area PA may be arranged around the display area DA. For example, in an embodiment, the peripheral area PA may surround the entire display area DA.

[0044] The display area DA may include a plurality of light emitting areas LA and a light blocking area BA. Each of the plurality of light emitting areas LA may include a first light emitting area LA1, a second light emitting area LA2, and a third light emitting area LA3.

[0045] Each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be an area where light emitted from the light emitting device is emitted to the outside of the display device 1000. For example, in an embodiment, the first light may be emitted from the first light emitting area LA1, the second light may be emitted from the second light emitting area LA2, and the third light may be emitted from the third light emitting area LA3.

[0046] For example, in the embodiment, the first light may be red light, the second light may be green light, and the third light may be blue light. However, the present disclosure is not limited thereto, and for example, in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3, various colors of light such as yellow, cyan, and magenta may be emitted.

[0047] Four or more kinds of light may be emitted from the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3. For example, in an embodiment, in addition to red light, green light, and blue light, the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be combined to emit at least one of yellow light, cyan light, and magenta light. In addition, the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be combined to emit white light.

[0048] In a plan view (when viewed in the third direction D3), each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be repeatedly disposed along the row direction and the column direction. Specifically, each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be repeatedly disposed along the first direction D1 and the second direction D2 perpendicular to the first direction D1.

[0049] For example, in an embodiment, the first light-emitting area LA1 and the third light-emitting area LA3 may be alternately arranged in odd rows (e.g., the first row) of the display area DA along the first direction D1, and the second light-emitting area LA2 may be repeatedly arranged in even rows (e.g., the second row) of the display area DA adjacent to the odd rows along the first direction D1.

[0050] The areas of the first light-emitting area LA1, the second light-emitting area LA2, and the third light-emitting area LA3 may be different from each other. For example, in an embodiment, the area of ​​the first light-emitting area LA1 emitting red light may be larger than the area of ​​the second light-emitting area LA2 emitting green light and the area of ​​the third light-emitting area LA3 emitting blue light. In this case, the area of ​​the second light-emitting area LA2 may be larger than the area of ​​the third light-emitting area LA3. However, the present disclosure is not limited thereto. In an embodiment, the area of ​​the second light-emitting area LA2 emitting green light may be larger than the area of ​​the first light-emitting area LA1 emitting red light and the area of ​​the third light-emitting area LA3 emitting blue light. In this case, for example, the area of ​​the first light-emitting area LA1 may be larger than the area of ​​the third light-emitting area LA3.

[0051] Each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may have a triangular plane shape, a square plane shape, a circular plane shape, an orbital plane shape, an elliptical plane shape, etc. For example, in an embodiment, each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may have a quadrilateral plane shape (e.g., a rectangular plane shape).

[0052] The light blocking area BA may be disposed between the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3. For example, in an embodiment, in a plan view, the light blocking area BA may surround the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3. The light blocking area BA may not emit light.

[0053] Figure 2 It is along Figure 1 A cross-sectional view taken along line II'.

[0054] Reference Figure 2 The display device 1000 in the embodiment of the present disclosure may include a substrate 110, a driver 120, an insulating structure 130, a pixel defining layer 140, a light emitting device 150, an encapsulation structure 160, a dam layer 170, a color conversion layer 180, a cover layer 190, a low refractive index layer 210, a color filter layer 230 and a coating layer CL.

[0055] The display device 1000 may have a structure including a coating layer CL disposed on one substrate 110 .

[0056] The light emitting device 150 may include a lower electrode 151, a light emitting layer 152, and an upper electrode 153. The color conversion layer 180 may include a first color conversion pattern 181, a second color conversion pattern 182, and a transmissive pattern 183. The coating layer CL may include a first coating layer 250 and a second coating layer 270.

[0057] The substrate 110 may include a transparent material or an opaque material. The substrate 110 may include a transparent resin substrate or be composed of a transparent resin substrate. In an embodiment, the transparent resin substrate may include a polyimide substrate, etc. In this case, the polyimide substrate 110 may include a first organic layer, a first barrier layer, or a second organic layer, etc. In an optional embodiment, the substrate 110 may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, a fluorine-doped quartz substrate, a soda-lime glass substrate, or an alkali-free glass substrate, etc. These may be used alone or in any combination with each other.

[0058] The driver 120 may be disposed on the substrate 110. For example, in an embodiment, the driver 120 may include a thin film transistor. For example, in an embodiment, the driver 120 may include amorphous silicon, polysilicon, or a metal oxide semiconductor.

[0059] The metal oxide semiconductor may include a binary compound (AB) containing indium (In), zinc (Zn), gallium (Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), or magnesium (Mg). x ), ternary compounds (AB x C y ) or quaternary compound (AB x C y D z ) etc. For example, in an embodiment, the metal oxide semiconductor may include zinc oxide (ZnO x ), gallium oxide (GaO x ), tin oxide (SnO x ), indium oxide (InO x ), indium gallium oxide ("IGO"), indium zinc oxide ("IZO"), indium tin oxide ("ITO"), indium zinc tin oxide ("IZTO"), or indium gallium zinc oxide ("IGZO"), etc. These may be used alone or in any combination with one another.

[0060] The insulating structure 130 may be disposed on the substrate 110. The insulating structure 130 may cover the driver 120. The insulating structure 130 may include a combination of at least one inorganic insulating layer and at least one organic insulating layer. For example, in an embodiment, the inorganic insulating layer may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), Silicon Carbide (SiC x ), silicon oxynitride (SiO x N y ) or silicon oxycarbide (SiO x C y) etc. In addition, the organic insulating layer may include or consist of a photoresist, a polyacrylic resin, a polyimide resin, a polyamide resin, a siloxane resin, an acrylic resin or an epoxy resin etc. These may be used alone or in any combination.

[0061] The lower electrode 151 may be disposed in each of the first light emitting region LA1, the second light emitting region LA2, and the third light emitting region LA3 on the insulating structure 130. The lower electrode 151 may be connected to the driver 120 via a contact hole defined by removing a portion of the insulating structure 130. For example, in an embodiment, the lower electrode 151 may include a metal, an alloy, a metal nitride, a conductive metal oxide, or a transparent conductive material, etc. These may be used alone or in any combination with each other. In an embodiment, the lower electrode 151 may be used as an anode.

[0062] The pixel defining layer 140 may be disposed in the light blocking area BA on the insulating structure 130 and the lower electrode 151. The pixel defining layer 140 may cover opposite sides of the lower electrode 151 and may expose the upper surface of the lower electrode 151. The pixel defining layer 140 may include an organic material or an inorganic material. For example, in an embodiment, the pixel defining layer 140 may include an organic material. In an embodiment, the organic material that may be used for the pixel defining layer 140 may include a photoresist, a polyacrylic resin, a polyimide resin, a polyamide resin, a siloxane resin, an acrylic resin, or an epoxy resin, etc. These may be used alone or in any combination with each other.

[0063] The light emitting layer 152 may be disposed on the lower electrode 151. For example, in an embodiment, holes provided from the lower electrode 151 and electrons provided from the upper electrode 153 may be recombined in the light emitting layer 152 to form excitons, and as the excitons change from an excited state to a ground state, light may be emitted from the light emitting layer 152. The light emitting layer 152 may emit light having a predetermined color (e.g., red, green, and blue). For example, in an embodiment, the light emitting layer 152 may emit light (e.g., blue light) L1.

[0064] The upper electrode 153 may be disposed on the light emitting layer 152 and the pixel defining layer 140. The upper electrode 153 may be completely disposed in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 and the light blocking area BA. For example, in an embodiment, the upper electrode 153 may include a metal, an alloy, a metal nitride, a conductive metal oxide, or a transparent conductive material, etc. These may be used alone or in any combination with each other. In an embodiment, the upper electrode 153 may be used as a cathode.

[0065] Therefore, a light emitting device 150 including a lower electrode 151, a light emitting layer 152, and an upper electrode 153 may be disposed on the substrate 110. The light emitting device 150 may be disposed in each of the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3. The light emitting device 150 may be electrically connected to the driver 120. In an embodiment, the light emitting device 150 may include a blue light emitting device that emits light (e.g., blue light) L1.

[0066] The encapsulation structure 160 may be disposed on the upper electrode 153. The encapsulation structure 160 may prevent impurities or moisture, etc. from penetrating into the light emitting device 150 from the outside. The encapsulation structure 160 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. In an embodiment, the inorganic encapsulation layer may include silicon oxide, silicon nitride, or silicon oxynitride, etc. For example, these may be used alone or in any combination with each other. The organic encapsulation layer may include a cured polymer such as polyacrylate.

[0067] The bank layer 170 may be disposed on the encapsulation structure 160. The bank layer 170 may overlap the light blocking area BA. The bank layer 170 may surround the color conversion layer 180. During the process of forming the color conversion layer 180, a space that may accommodate ink components may be defined in the bank layer 170. Therefore, in a plan view, the bank layer 170 may have a grid shape or a matrix shape.

[0068] For example, in an embodiment, the bank layer 170 may include an organic material such as epoxy-based resin, phenolic-based resin, acrylic-based resin, or silicone-based resin, etc. These may be used alone or in any combination with each other.

[0069] For example, in an embodiment, the bank layer 170 may further include a light blocking material to function as a black matrix. For example, in an embodiment, at least a portion of the bank layer 170 may further include a light blocking material such as a pigment or dye such as carbon black.

[0070] Color conversion layer 180 may be disposed on encapsulation structure 160. Color conversion layer 180 may convert light emitted from light emitting device 150 into light having a predetermined wavelength.

[0071] As described above, the color conversion layer 180 may include a first color conversion pattern 181, a second color conversion pattern 182, and a transmissive pattern 183. The first color conversion pattern 181 may overlap the first light emitting area LA1, the second color conversion pattern 182 may overlap the second light emitting area LA2, and the transmissive pattern 183 may overlap the third light emitting area LA3.

[0072] The first color conversion pattern 181 may convert the light (e.g., blue light) L1 emitted from the light emitting device 150 into the first color light Lr. The second color conversion pattern 182 may convert the light L1 emitted from the light emitting device 150 into the second color light Lg. The transmissive pattern 183 may transmit the light L1 emitted from the light emitting device 150. For example, in an embodiment, the first color may be red, and the second color may be green. In addition, the transmissive pattern 183 may transmit the third color light (e.g., blue light) Lb. However, the present disclosure is not limited thereto.

[0073] Figure 3 It is shown that the Figure 2 Cross-sectional view of a color conversion layer in a display device.

[0074] Reference Figure 2 and Figure 3 , the first color conversion pattern 181 may include first quantum particles 181c emitting first color light Lr excited by the light L1 emitted from the light emitting device 150. In addition, the first color conversion pattern 181 may further include a first photosensitive polymer 181b in which first scattering particles 181a are dispersed.

[0075] The second color conversion pattern 182 may include second quantum particles 182c emitting second color light Lg excited by the light L1 emitted from the light emitting device 150. In addition, the second color conversion pattern 182 may further include a second photosensitive polymer 182b in which second scattering particles 182a are dispersed.

[0076] The transmissive pattern 183 may transmit the light L1 emitted from the light emitting device 150 to emit third color light (eg, blue light) Lb. In addition, the transmissive pattern 183 may include a third photosensitive polymer 183b in which third scattering particles 183a are dispersed.

[0077] For example, in an embodiment, each of the first photosensitive polymer 181b, the second photosensitive polymer 182b, and the third photosensitive polymer 183b may include an organic material having light transmittance such as a silicone resin or an epoxy resin, etc. The first scattering particles 181a, the second scattering particles 182a, and the third scattering particles 183a may scatter and emit the light L1 emitted from the light emitting device 150. In addition, the first scattering particles 181a, the second scattering particles 182a, and the third scattering particles 183a may include the same material as each other.

[0078] Therefore, the first color light Lr emitted from the first light emitting area LA1, the second color light Lg emitted from the second light emitting area LA2, and the third color light Lb emitted from the third light emitting area LA3 may be emitted.

[0079] Return to reference Figure 2, the capping layer 190 may be disposed on the bank layer 170 and the color conversion layer 180. The capping layer 190 may be completely disposed in the first, second, and third light emitting areas LA1, LA2, and LA3 and the light blocking area BA. The capping layer 190 may serve as a moisture barrier to prevent degradation of the color conversion layer 180.

[0080] For example, in an embodiment, capping layer 190 may be disposed along the contour of each of bank layer 170 and color conversion layer 180. That is, capping layer 190 may have a substantially uniform thickness along the contour of each of bank layer 170 and color conversion layer 180. In another embodiment, capping layer 190 may cover bank layer 170 and color conversion layer 180 on bank layer 170 and color conversion layer 180, and may have a flat top surface without forming a step around bank layer 170 and color conversion layer 180.

[0081] The cap layer 190 may include a silicon compound. For example, in an embodiment, the cap layer 190 may include silicon oxide, silicon nitride, silicon oxynitride, etc. These may be used alone or in any combination with each other.

[0082] The low refractive index layer 210 may be disposed on the cap layer 190. The low refractive index layer 210 may be completely disposed in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 and the light blocking area BA. The low refractive index layer 210 may have a relatively low refractive index. For example, in an embodiment, the refractive index of the low refractive index layer 210 may be lower than the refractive index of the color conversion layer 180. The low refractive index layer 210 may include an organic material. For example, in an embodiment, the low refractive index layer 210 may include an organic polymer material containing silicon.

[0083] The color filter layer 230 may be disposed on the low refractive index layer 210. For example, in an embodiment, the color filter layer 230 may include a light blocking pattern and a color filter pattern.

[0084] The light blocking pattern may overlap the light blocking area BA. The light blocking pattern may provide a space for accommodating ink components during a process of forming a color filter pattern. Therefore, in a plan view, the light blocking pattern may have a grid shape or a matrix shape.

[0085] The light blocking pattern can prevent light leakage. For example, in an embodiment, the light blocking pattern may include an organic material such as epoxy resin, phenolic resin, acrylic resin, or silicone resin, etc. These can be used alone or in any combination with each other.

[0086] In addition, the light blocking pattern may further include a light blocking material such as a black pigment, for example carbon black, or a black dye, etc. For example, in an embodiment, the light blocking pattern may be a black matrix.

[0087] The color filter pattern may overlap with each of the plurality of light emitting regions (e.g., the first light emitting region LA1, the second light emitting region LA2, and the third light emitting region LA3). In an embodiment, the color filter pattern may include a first color filter pattern, a second color filter pattern, and a third color filter pattern. For example, the first color filter pattern may remove colors other than the first color from the colors of light passing through the first light emitting region LA1. The second color filter pattern may remove colors other than the second color from the colors of light passing through the second light emitting region LA2. The third color filter pattern may remove colors other than the third color from the colors of light passing through the third light emitting region LA3. However, the present disclosure is not limited thereto.

[0088] Figure 4 It is shown that the Figure 2 A cross-sectional view of an embodiment of a coating layer in a display device.

[0089] Reference Figure 2 and Figure 4 , an overcoat layer CL may be disposed on the color filter layer 230 . The overcoat layer CL may include a first overcoat layer 250 and a second overcoat layer 270 .

[0090] In an embodiment, the first coating layer 250 may be disposed on the color filter layer 230. The first coating layer 250 may be completely disposed in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 and the light blocking area BA. The first coating layer 250 may perform a surface flattening function and protect the driver 120 or the light emitting device 150, etc. from the penetration of external air. In addition, the first coating layer 250 may remove specular reflection light via scattered reflection. Specular reflection (or glass reflection) may refer to reflected light having the same incident angle and reflection angle.

[0091] In an embodiment, the first coating layer 250 may include a dispersion layer 252 and scattering particles 254 .

[0092] In an embodiment, the dispersion layer 252 may include an inorganic material and / or an organic material. For example, in an embodiment, the dispersion layer 252 may include an acrylic resin, a methacrylic resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a perylene resin, or a silsesquioxane resin (e.g., polyhedral oligomer silsesquioxane (“POSS”)), etc. These may be used alone or in any combination with each other. That is, the dispersion layer 252 may include a thermosetting material or a photocurable material. However, the present disclosure is not limited thereto.

[0093] The scattering particles 254 may have a different refractive index from the material included in the dispersion layer 252, and may be particles capable of scattering light. In an embodiment, the scattering particles 254 may be silica particles, hollow silica particles, organic polymer particles, metal oxide particles, metal particles, carbon particles, or zeolite particles, etc. These may be used alone or in any combination with each other. However, the present disclosure is not limited thereto. The scattering particles 254 may use various particles capable of scattering light.

[0094] The size S1 of the scattering particles 254 may be about ¼ of the wavelength of light or more. In an embodiment, the size S1 of the scattering particles 254 may be about 0.2 micrometers (μm) or more and about 2 micrometers (μm) or less.

[0095] When the size of the scattering particles 254 is less than about 0.2 microns, scattered reflection may be difficult.

[0096] When the size of the scattering particles 254 exceeds about 2 micrometers, the thickness of the dispersion layer 252 that disperses the scattering particles 254 may become thicker. Therefore, the thickness of the display device 1000 may also increase.

[0097] In an embodiment, the content of the scattering particles 254 may be about 10 weight percent (wt.%) or more and about 80 weight percent (wt.%) or less. The content of the scattering particles 254 may refer to a value expressed as a weight percentage of the scattering particles 254 .

[0098] When the content of the scattering particles 254 is less than about 10 weight percent, scattering reflection may be difficult.

[0099] When the content of the scattering particles 254 exceeds about 80 weight percent, the scattering particles 254 may be difficult to disperse in the dispersion layer 252. Therefore, the film characteristics of the first coating layer 250 may not be achieved.

[0100] The thickness T1 of the first coating layer 250 may be about 3 micrometers or more and about 10 micrometers or less. Therefore, the scattering particles 254 may be uniformly dispersed in the dispersion layer 252 .

[0101] However, the present disclosure is not limited thereto.

[0102] In an embodiment, the second coating layer 270 may be disposed on the first coating layer 250. The second coating layer 270 may be completely disposed in the first, second, and third light emitting areas LA1, LA2, and LA3 and the light blocking area BA. The second coating layer 270 may remove specularly reflected light via destructive interference.

[0103] For example, in an embodiment, the second coating layer 270 may have a single-layer structure. In this case, the target reflectivity may be greater than the reflectivity of an anti-reflection ("AR") coating according to a comparative example. The AR coating according to a comparative example may be a coating that reduces reflectivity using an optical interference phenomenon or reduces surface reflection via a silicon film including porous silicon dioxide.

[0104] In an embodiment, the second coating layer 270 may include a silicon compound having a refractive index of less than about 1.5. Preferably, the second coating layer 270 may include a silicon compound having a refractive index of about 1.45 or less. For example, in an embodiment, the second coating layer 270 may include silicon oxide, silicon nitride, silicon oxynitride, etc. These may be used alone or in any combination with each other.

[0105] For example, in an embodiment, the second coating layer 270 including a silicon compound may be formed via a chemical vapor deposition (“CVD”) process. At this time, the refractive index may be adjusted by forming pores in the second coating layer 270 .

[0106] When the refractive index of the second coating layer 270 exceeds about 1.5, it may be difficult to cause destructive interference. The refractive index of the first coating layer 250 may be about 1.5. Therefore, when there is no difference in refractive index between the first coating layer 250 and the second coating layer 270, destructive interference may not occur. Therefore, reflected light may be visible in the display device 1000, and the display quality may be deteriorated.

[0107] In an embodiment, the second coating layer 270 may include a polymer having a fluorine content of about 10% or more and a molecular weight of about 10,000 or more. For example, in an embodiment, the second coating layer 270 may include an organic material substituted with fluorine and / or an inorganic material substituted with fluorine. For example, in an embodiment, the second coating layer 270 may include fluorinated polysiloxane, fluorinated polyurethane, fluorinated polyurethane acrylate, or fluorinated polyhedral oligomer silsesquioxane, etc. These may be used alone or in any combination with each other.

[0108] For example, in an embodiment, when the fluorine content is less than about 10%, the refractive index of the second coating layer 270 may exceed about 1.5. Therefore, as described above, reflected light may be visible in the display device 1000 and display quality may be deteriorated.

[0109] When the molecular weight is less than about 10,000, the mechanical properties (eg, hardness, etc.) of the second coating layer 270 may be reduced. Therefore, the mechanical properties (eg, durability, etc.) of the display device 1000 may be deteriorated.

[0110] Figure 5 It is shown that the Figure 2A cross-sectional view of another embodiment of a coating layer in a display device.

[0111] Reference Figure 2 and Figure 5 , an overcoat layer CL' may be disposed on the color filter layer 230. The overcoat layer CL' may include a first overcoat layer 250 and a second overcoat layer 270'.

[0112] Figure 5 The coating layer CL' and Figure 4 The coating layers CL of the embodiment of the present invention may differ only in the composition of the second coating layer 270'. Hereinafter, repeated descriptions will be omitted or simplified.

[0113] In embodiments, the first coating layer 250 may be disposed on the color filter layer 230 , and the second coating layer 270 ′ may be disposed on the first coating layer 250 .

[0114] In an embodiment, the second coating layer 270' may further include a plurality of hollow inorganic particles (eg, inorganic particles 272') dispersed therein. For example, in an embodiment, each of the plurality of inorganic particles 272' may include silicon dioxide (SiO 2 ), magnesium fluoride (MgF 2 ) or iron oxide (Fe 3 O 4 ) etc. These can be used alone or in any combination with each other.

[0115] In an embodiment, the second coating layer 270 ′ may include a polymer having a content of the inorganic particles 272 ′ of about 10 weight percent or more and about 80 weight percent or less and a molecular weight of about 10,000 or more.

[0116] When the content of the inorganic particles 272' is less than about 10 weight percent, the refractive index of the second coating layer 270' may exceed about 1.5. Therefore, as described above, reflected light may be visible in the display device 1000, and display quality may be deteriorated.

[0117] When the content of the inorganic particles 272' exceeds about 80 weight percent, the mechanical properties (eg, hardness, etc.) of the second coating layer 270' may be deteriorated. Therefore, the mechanical properties (eg, durability, etc.) of the display device 1000 may be deteriorated.

[0118] In an embodiment, a size S2 of the inorganic particles 272' included in the second coating layer 270' may be about 50 nm or more and about 400 nm or less. A thickness T2 of the second coating layer 270' may be about 80 nm or more and about 500 nm or less.

[0119] When the thickness T2 of the second coating layer 270' is less than about 80 nanometers or exceeds about 500 nanometers, destructive interference may not occur. The size S2 of the inorganic particles 272' may be affected by the thickness T2 of the second coating layer 270'. For example, in an embodiment, the thickness T2 of the second coating layer 270' may be less than the thickness T1 of the first coating layer 250. Therefore, the size S2 of the inorganic particles 272' may be less than the size S1 of the scattering particles 254.

[0120] In the case of the display device according to the comparative example, a matte film may be provided on the display panel. The matte film may be attached to the display panel using an adhesive (e.g., a pressure-sensitive adhesive ("PSA"), etc.). In the case of the matte film, the manufacturing cost is more than twice that of the AR film. Therefore, the process cost of the display device including the matte film according to the comparative example may be high.

[0121] However, the display device 1000 in the embodiment of the present disclosure may include a substrate 110, a light emitting device 150 disposed on the substrate 110, a color conversion layer 180 disposed on the light emitting device 150, a color filter layer 230 disposed on the color conversion layer 180, a first coating layer 250 disposed on the color filter layer 230 and including scattering particles 254 and a dispersion layer 252 in which the scattering particles 254 are dispersed, and a second coating layer 270 disposed on the first coating layer 250 and having a refractive index smaller than that of the first coating layer 250. Therefore, the reflectivity of the display device 1000 with respect to external light can be reduced. In addition, the display quality of the display device 1000 can be improved.

[0122] In the above, the display device 1000 of the present disclosure is described as an organic light emitting display ("OLED") device, but the present disclosure is not limited thereto. For example, in an embodiment, the display device 1000 may be a liquid crystal display ("LCD") device, a field emission display ("FED") device, a plasma display device ("PDD"), an electrophoretic display ("EPD") device, a quantum dot display device, or an inorganic light emitting display device, etc.

[0123] Figure 6 , Figure 7 and Figure 8 It shows the manufacturing Figure 2 A cross-sectional view of a method for displaying a device.

[0124] Reference Figure 6 In an embodiment, the light emitting device 150, the color conversion layer 180, and the color filter layer 230 may be sequentially formed on the substrate 110 (S100).

[0125] The substrate 110 including a transparent material or an opaque material may be provided. The driver 120 may be formed on the substrate 110. For example, in an embodiment, the driver 120 may be formed using amorphous silicon, crystalline silicon, or a metal oxide semiconductor.

[0126] The insulating structure 130 may be formed on the substrate 110. The insulating structure 130 may be completely formed in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 and the light blocking area BA. The insulating structure 130 may cover the driver 120. For example, in an embodiment, the insulating structure 130 may include at least one inorganic insulating layer and at least one organic insulating layer.

[0127] The lower electrode 151 may be formed in each of the first light emitting region LA1, the second light emitting region LA2, and the third light emitting region LA3 on the insulating structure 130. The lower electrode 151 may be connected to the driver 120 via a contact hole defined by removing a portion of the insulating structure 130. For example, in an embodiment, the lower electrode 151 may be formed using a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, or the like.

[0128] The pixel defining layer 140 may be formed in the light blocking area BA on the insulating structure 130 and the lower electrode 151. The pixel defining layer 140 may have an opening exposing a portion of the upper surface of the lower electrode 151. For example, in embodiments, the pixel defining layer 140 may be formed using an organic material or an inorganic material.

[0129] The light emitting layer 152 may be formed on the lower electrode 151. Specifically, the light emitting layer 152 may be formed inside the opening of the pixel defining layer 140. For example, in an embodiment, the light emitting layer 152 may be formed using a relatively low molecular weight organic compound or a relatively high molecular weight organic compound.

[0130] The upper electrode 153 may be formed on the light emitting layer 152 and the pixel defining layer 140. The upper electrode 153 may be completely formed in the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 and the light blocking area BA. For example, in an embodiment, the upper electrode 153 may be formed using metal, alloy, metal nitride, conductive metal oxide, or transparent conductive material, etc.

[0131] Therefore, the light emitting device 150 including the lower electrode 151 , the light emitting layer 152 , and the upper electrode 153 may be formed in each of the first, second, and third light emitting regions LA1 , LA2 , and LA3 on the substrate 110 .

[0132] The encapsulation structure 160 may be formed on the upper electrode 153. The encapsulation structure 160 may be completely formed in the first, second, and third light emitting regions LA1, LA2, and LA3 and the light blocking region BA. For example, in an embodiment, the encapsulation structure 160 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer.

[0133] The bank layer 170 may be formed on the encapsulation structure 160. Specifically, the bank layer 170 may be formed to overlap the light blocking area BA. For example, in an embodiment, the bank layer 170 may be formed using an organic material or the like.

[0134] An opening may be defined in the bank layer 170. The opening may overlap each of a plurality of light emitting areas (eg, the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3). The opening may receive ink components in a process of forming the color conversion layer 180.

[0135] The color conversion layer 180 may be formed via an inkjet process. As described above, the color conversion layer 180 may be formed by discharging an ink component into an opening. The ink component may be repeatedly discharged into the opening, and a plurality of color conversion patterns (e.g., a first color conversion pattern 181, a second color conversion pattern 182, and a transmissive pattern (also referred to as a third color conversion pattern) 183) may be formed by baking.

[0136] The capping layer 190 may be formed on the color conversion layer 180 and the bank layer 170. The capping layer 190 may be completely formed in the first, second, and third light emitting areas LA1, LA2, and LA3 and the light blocking area BA. For example, in an embodiment, the capping layer 190 may be formed using silicon oxide, silicon nitride, silicon oxynitride, or the like.

[0137] The low refractive index layer 210 may be formed on the capping layer 190. The low refractive index layer 210 may be completely formed in the first, second and third light emitting areas LA1, LA2 and LA3 and the light blocking area BA. For example, in an embodiment, the low refractive index layer 210 may be formed using an organic material.

[0138] The color filter layer 230 may be formed on the low refractive index layer 210. For example, in an embodiment, a light blocking pattern may be first formed on the low refractive index layer 210. The light blocking pattern may provide a space for accommodating ink components.

[0139] The color filter pattern may be formed by discharging the ink composition into an opening defined by the light blocking pattern. The color filter pattern may be formed by discharging the ink composition into a space defined by the light blocking pattern. A plurality of color filter patterns (e.g., a first color filter pattern, a second color filter pattern, and a third color filter pattern) may be formed by repeatedly discharging and baking the ink composition in the space.

[0140] Reference Figure 7 In an embodiment, a first coating layer 250 may be formed on the color filter layer 230 (S200). The first coating layer 250 may be completely formed in the first, second, and third light emitting areas LA1, LA2, and LA3 and the light blocking area BA.

[0141] In an embodiment, the first coating layer 250 may include a dispersion layer 252 and scattering particles 254. The scattering particles 254 may be dispersed in the dispersion layer 252. For example, in an embodiment, the first coating layer 250 may be formed by mixing the scattering particles 254 with a material forming the dispersion layer 252, coating the mixed material on the color filter layer 230, and exposing the material. A baking process may be included between coating and exposure. The baking process may be a process for removing a solvent.

[0142] In an embodiment, the dispersion layer 252 may include an inorganic material and / or an organic material or be composed of an inorganic material and / or an organic material. For example, in an embodiment, the dispersion layer 252 may include an acrylic resin, a methacrylic resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a perylene resin or a silsesquioxane resin (e.g., POSS), etc. or be composed of an acrylic resin, a methacrylic resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a perylene resin or a silsesquioxane resin (e.g., POSS), etc. These may be used alone or in any combination with each other. That is, the dispersion layer 252 may include a thermosetting material or a photocurable material or be composed of a thermosetting material or a photocurable material. However, the present disclosure is not limited thereto.

[0143] The scattering particles 254 may have a different refractive index from the material included in the dispersion layer 252, and may include or consist of particles capable of scattering light. In an embodiment, the scattering particles 254 may be silica particles, hollow silica particles, organic polymer particles, metal oxide particles, metal particles, carbon particles, or zeolite particles, etc. These may be used alone or in any combination with each other. However, the present disclosure is not limited thereto.

[0144] The size S1 of the scattering particles 254 (see Figure 4) may be about 1 / 4 of the wavelength of light or more. In an embodiment, the size S1 of the scattering particles 254 may be about 0.2 micrometers (μm) or more and about 2 micrometers (μm) or less.

[0145] When the size of the scattering particles 254 is less than about 0.2 microns, scattered reflection may be difficult.

[0146] When the size of the scattering particles 254 exceeds about 2 micrometers, the thickness of the dispersion layer 252 that disperses the scattering particles 254 may become thicker. Therefore, the thickness of the display device 1000 may also increase.

[0147] In an embodiment, the content of the scattering particles 254 may be about 10 weight percent (wt. %) or more and about 80 weight percent (wt. %) or less.

[0148] When the content of the scattering particles 254 is less than about 10 weight percent, scattering reflection may be difficult.

[0149] When the content of the scattering particles 254 exceeds about 80 weight percent, the scattering particles 254 may be difficult to disperse in the dispersion layer 252. Therefore, the film characteristics of the first coating layer 250 may not be achieved.

[0150] In an embodiment, the thickness T1 of the first coating layer 250 (see Figure 4 ) may be about 3 micrometers or more and about 10 micrometers or less. Therefore, the scattering particles 254 may be uniformly dispersed in the dispersion layer 252.

[0151] In the above, it has been described that the first coating layer 250 includes or consists of a photocurable material in which the scattering particles 254 are dispersed, but the present disclosure is not limited thereto. For example, in an embodiment, the first coating layer 250 may include or consist of a thermosetting material.

[0152] Reference Figure 8 In an embodiment, a second coating layer 270 having a refractive index smaller than that of the first coating layer 250 may be formed on the first coating layer 250 (S300). The second coating layer 270 may be completely formed in the first, second, and third light emitting areas LA1, LA2, and LA3 and the light blocking area BA. The second coating layer 270 may remove specularly reflected light via destructive interference.

[0153] In an embodiment, the second coating layer 270 may include or consist of a silicon compound having a refractive index of less than about 1.5. Preferably, the second coating layer 270 may include or consist of a silicon compound having a refractive index of about 1.45 or less. For example, in an embodiment, the second coating layer 270 may include or consist of silicon oxide, silicon nitride, silicon oxynitride, etc. These may be used alone or in any combination with each other.

[0154] For example, in an embodiment, the second coating layer 270 including a silicon compound may be formed via a chemical vapor deposition (“CVD”) process. At this time, the refractive index may be adjusted by forming pores in the second coating layer 270 .

[0155] In an embodiment, the second coating layer 270 may include a polymer having a fluorine content of about 10% or more and a molecular weight of about 10,000 or more. For example, in an embodiment, the second coating layer 270 may include an organic material substituted with fluorine and / or an inorganic material substituted with fluorine. For example, in an embodiment, the second coating layer 270 may include fluorinated polysiloxane, fluorinated polyurethane, fluorinated polyurethane acrylate, or fluorinated polyhedral oligomer silsesquioxane, etc. These may be used alone or in any combination with each other.

[0156] In the embodiments, as mentioned above, Figure 5 As described above, the second coating layer 270' may further include a plurality of hollow inorganic particles (eg, inorganic particles 272') dispersed therein. For example, in an embodiment, each of the plurality of inorganic particles may include silicon dioxide (SiO 2 ), magnesium fluoride (MgF 2 ) or iron oxide (Fe 3 O 4 ) etc. These can be used alone or in any combination with each other.

[0157] In an embodiment, the second coating layer 270 ′ may include a polymer having a content of about 10 weight percent or more and about 80 weight percent or less of inorganic particles and a molecular weight of about 10,000 or more.

[0158] In an embodiment, the size of the hollow inorganic particles included in the second coating layer 270' (eg, the size of the inorganic particles 272') may be about 50 nanometers or more and about 400 nanometers or less. The thickness T2 of the second coating layer 270' may be about 80 nanometers (nm) or more and about 500 nanometers (nm) or less.

[0159] Therefore, it is possible to produce Figure 2Display device 1000. In the above, it has been described that the second coating layer 270 includes a photocurable material or is composed of a photocurable material, but the present disclosure is not limited thereto. For example, in an embodiment, the second coating layer 270 may include a thermosetting material or be composed of a thermosetting material.

[0160] In the case of the display device according to the comparative example, a matte film may be attached to the display panel. The matte film may be attached to the display panel using an adhesive (e.g., PSA, etc.). In the case of the matte film, the manufacturing cost is more than twice the manufacturing cost of the AR film. Therefore, the process cost of the display device including the matte film according to the comparative example may be high.

[0161] However, the method of manufacturing a display device in an embodiment of the present disclosure may include: sequentially forming a light emitting device 150, a color conversion layer 180, and a color filter layer 230 on a substrate 110 (S100); forming a first coating layer 250 including scattering particles 254 and a dispersion layer 252 in which the scattering particles 254 are dispersed on the color filter layer 230 (S200); and forming a second coating layer 270 having a refractive index smaller than that of the first coating layer 250 on the first coating layer 250 (S300). By forming the coating layers (e.g., the first coating layer 250 and the second coating layer 270), the process of manufacturing the display device can be simplified and the manufacturing cost can be reduced compared to the process of attaching an additional member (e.g., a matte film).

[0162] The display device (eg, Figure 2 The SCI reflectivity and SCE reflectivity of the display device 1000 of FIG. 1000 were measured using a CA-3700 reflectivity measuring device. Here, the SCI reflectivity indicates a reflectivity including scattered reflection and specular reflection, and the SCE reflectivity indicates a reflectivity including only scattered reflection. The SCI reflectivity of the display device was about 3% or less, and the SCE reflectivity was about 0.6% or less. Through these results, it can be confirmed that the reflectivity of the display device to external light can be reduced.

[0163] In addition, the pencil hardness of the display device was measured. The pencil hardness was measured using a pencil hardness tester. The pencil hardness was confirmed to be about 2H or greater. Through these results, it can be confirmed that the surface hardness of the display device can be improved and external deformation can be prevented.

[0164] In addition, the contact angle of the display device was measured. The contact angle was measured using a contact angle meter. The contact angle can be confirmed to be about 100 degrees or greater. Through these results, it can be confirmed that the display device has excellent anti-fouling performance (for example, when fingerprints or contaminants adhere to the surface of the display device, the degree to which fingerprints or contaminants are easily wiped off).

[0165] Furthermore, as described above, by omitting an additional matte film by performing surface treatment on a display panel, the manufacturing cost of a display device may be reduced.

[0166] Embodiments of the present invention may be applied to display devices and electronic devices including display devices, such as computers, notebook computers, mobile phones, smart phones, smart tablets, portable multimedia players ("PMP"), personal digital assistants ("PDA"), and / or MP3 players.

[0167] The embodiments of the present disclosure should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the present invention to those skilled in the art.

[0168] Although the present invention has been specifically shown and described with reference to embodiments of the present invention, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit or scope of the present invention as defined by the appended claims. It will therefore be understood that the foregoing is a description of various embodiments and is not to be construed as limited to the disclosed illustrative embodiments, and modifications to the disclosed embodiments as well as other embodiments are intended to be included within the scope of the appended claims. In addition, embodiments or portions of embodiments may be combined in whole or in part without departing from the scope of the present invention.

Claims

1. A display device, wherein: The display device comprises: substrate; A light emitting device, disposed on the substrate; A color conversion layer, disposed on the light emitting device; a color filter layer, disposed on the color conversion layer; a first coating layer disposed on the color filter layer and comprising scattering particles and a dispersion layer, the scattering particles being dispersed in the dispersion layer; and The second coating layer is disposed on the first coating layer, and the second coating layer has a refractive index smaller than that of the first coating layer.

2. The display device according to claim 1, wherein: The refractive index of the scattering particles is different from the refractive index of the dispersion layer, and The scattering particles include at least one of silica particles, hollow silica particles, organic polymer particles, metal oxide particles, metal particles, carbon particles, and zeolite particles.

3. The display device according to claim 1, wherein: The scattering particles have a size of 0.2 micrometers or more and 2 micrometers or less.

4. The display device according to claim 1, wherein: The content of the scattering particles is 10 weight percent or more and 80 weight percent or less.

5. The display device according to claim 1, wherein: The second coating layer includes a silicon compound having a refractive index less than 1.

5.

6. The display device according to claim 1, wherein: The second coating layer includes a material having a fluorine content of 10 percent or more and a molecular weight of 10,000 or more.

7. The display device according to claim 1, wherein: The second coating layer includes a material having a hollow silica content of 10 weight percent or more and 80 weight percent or less and a molecular weight of 10,000 or more, and The hollow silica particles of the hollow silica content have a size of 50 nanometers or more and 400 nanometers or less.

8. The display device according to claim 1, wherein: The thickness of the first coating layer is greater than the thickness of the second coating layer.

9. The display device according to claim 1, wherein: The second coating layer has a thickness of 80 nanometers or more and 500 nanometers or less.

10. The display device according to claim 1, wherein: The scattering particles scatter and reflect specular light, and The second coating layer removes the specularly reflected light via destructive interference.

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