Display device and method of manufacturing the same

Abstract

The present application relates to a display device. The display device may include a display panel, a light control layer disposed on the display panel, and a low reflection layer disposed on the light control layer. The low reflection layer may include a first color material having a first molar extinction coefficient and a second color material having a second molar extinction coefficient. The functional group of the second color material may be different from the functional group of the first color material. The first molar extinction coefficient may be less than the second molar extinction coefficient, and the content of the first color material may be less than the content of the second color material. Due to the low reflection layer including color materials with different molar extinction coefficients, the display device has improved color reproduction and reduced reflectivity of external light.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to and the benefit of Korean Patent Application No. 10-2020-0074359 filed in the Korean Intellectual Property Office (KIPO) on June 18, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device and a method of manufacturing the same, and more particularly, to a display device having improved reliability and a method of manufacturing the same. Background Art

[0004] Various display devices are being developed for multimedia devices such as televisions, mobile phones, tablet computers, game units, etc. The display devices include various optical functional layers to provide users with better color images.

[0005] Recent developments in curved, rollable, and / or foldable display devices have led to research into display devices that are thinner while still providing improved color reproduction range and visibility. Summary of the invention

[0006] The present disclosure provides a display device having an improved color reproduction range and reduced external light reflectivity.

[0007] The present disclosure provides a method of manufacturing a display device having improved reliability.

[0008] An embodiment provides a display device, which may include: a display panel; a light control layer disposed on the display panel; and a low reflection layer disposed on the light control layer. The low reflection layer may include: a first color material having a first molar extinction coefficient; and a second color material having a second molar extinction coefficient. The functional group of the second color material may be different from the functional group of the first color material. The first molar extinction coefficient may be less than the second molar extinction coefficient, and the content of the first color material may be less than the content of the second color material.

[0009] The first molar extinction coefficient may be equal to or greater than about 10 3 M -1 cm -1 and less than about 10 5 M -1 cm -1 , and the second molar extinction coefficient may be equal to or greater than about 10 5 M -1 cm -1 .

[0010] The maximum absorption wavelength range of the first color material may be equal to or greater than about 500 nm and equal to or less than about 650 nm, and the maximum absorption wavelength range of the second color material may be equal to or greater than about 550 nm and equal to or less than about 630 nm.

[0011] The content of the first color material may be equal to or greater than about 2% and equal to or less than about 50% of the content of the second color material.

[0012] At least one of the first color material and the second color material may include a compound having the same functional group but different substituents.

[0013] The low reflection layer may include: a base portion; and protrusions protruding from the base portion and spaced apart from each other.

[0014] Each of the protrusions may have a width equal to or greater than about 10 nm and equal to or less than about 200 nm and a height equal to or greater than about 10 nm and equal to or less than about 200 nm.

[0015] The shortest distance between adjacent ones of the protrusions may be equal to or greater than about 10 nm and equal to or less than about 200 nm.

[0016] Each of the protrusions may have at least one of an upward convex shape with a curved surface, a hemispherical shape, a cylindrical shape, and a prismatic shape.

[0017] The display device may further include a light-controlling auxiliary layer disposed between the light-controlling layer and the low-reflection layer.

[0018] The light-controlling auxiliary layer may include: a transflective layer; and a phase control layer disposed on the transflective layer.

[0019] The transflective layer may include a metal layer.

[0020] The phase control layer may include at least one inorganic layer.

[0021] The display panel may be flexible.

[0022] An embodiment provides a display device, which may include: a display panel; a light control layer disposed on the display panel; and a low reflection layer disposed on the light control layer. The low reflection layer may include: a first color material including one or more compounds; and a second color material including one or more compounds. The first color material may include at least one of an anthraquinone-based compound, a phthalocyanine-based compound, and an azo-based compound, and the second color material may include at least one of a tetraazaporphyrin-based compound, a porphyrin-based compound, a squarylium-based compound, and a cyanine-based compound.

[0023] The first color material may have a thickness equal to or greater than about 10 3 M -1 cm -1 and less than about 10 5 M -1 cm -1 The second color material may have a molar extinction coefficient equal to or greater than about 10 5 M -1 cm -1 The maximum absorption wavelength range of the first color material may be equal to or greater than about 500 nm and equal to or less than about 650 nm. The maximum absorption wavelength range of the second color material may be equal to or greater than about 550 nm and equal to or less than about 630 nm.

[0024] The low reflection layer may include: a base portion; and a plurality of protrusions disposed on the base portion and spaced apart from each other.

[0025] An embodiment provides a method for manufacturing a display device. The method may include providing a display panel, providing a light control layer on the display panel, and providing a low-reflection layer on the light control layer. Providing the low-reflection layer may include providing a low-reflection layer composition, the low-reflection layer composition including a base resin, a first color material, and a second color material. The content of the second color material may be greater than the content of the first color material. The molar extinction coefficient of the second color material may be greater than the molar extinction coefficient of the first color material. The maximum absorption wavelength range of the second color material may be less than the maximum absorption wavelength range of the first color material.

[0026] Providing the low reflection layer may include coating a low reflection layer composition on the light control layer, pressing the coated low reflection layer composition using a master mold, irradiating light onto the master mold to form the low reflection layer, and separating the master mold.

[0027] The sum of the content of the first color material and the content of the second color material may be equal to or greater than about 0.2% and equal to or less than about 5% of the total content of the low-reflection layer composition, and the content of the first color material may be equal to or greater than about 2% and equal to or less than about 50% of the content of the second color material.

[0028] According to the embodiment, the reflectivity of the display device with respect to external light is reduced, and the color reproduction range of the display device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other advantages of the embodiments will become apparent by referring to the following detailed description when considered in conjunction with the accompanying drawings, in which:

[0030] Figure 1is a schematic perspective view showing a display device according to an embodiment;

[0031] Figure 2 is an exploded schematic perspective view showing a display device according to an embodiment;

[0032] Figure 3 is a schematic cross-sectional view showing a display device according to an embodiment;

[0033] Figure 4A is a schematic cross-sectional view showing a low reflection layer according to an embodiment;

[0034] Figure 4B is a schematic cross-sectional view showing a low reflection layer according to an embodiment;

[0035] Figure 4C is a schematic cross-sectional view showing a low reflection layer according to an embodiment;

[0036] Figure 5 It is shown Figure 4A An enlarged schematic cross-sectional view of the low reflection layer shown in FIG.

[0037] Figure 6 is a schematic plan view showing a low reflection layer according to an embodiment;

[0038] Figure 7 is a schematic perspective view showing a low reflection layer according to an embodiment;

[0039] Figure 8 is a graph showing reflectance as a function of wavelength range according to an embodiment example and a comparative example;

[0040] Fig. 9 is a schematic cross-sectional view showing a display device according to an embodiment;

[0041] Fig.10 is a schematic cross-sectional view showing a light-controlling auxiliary layer according to an embodiment;

[0042] Fig.11 is a flowchart illustrating a method of manufacturing a display device according to an embodiment;

[0043] Fig.12 is a flow chart showing a process of a method for providing a low reflection layer according to an embodiment;

[0044] Fig.13A is a schematic cross-sectional view showing a process of a method of manufacturing a display device according to an embodiment;

[0045] Fig. 13B is a schematic cross-sectional view showing a process of a method of manufacturing a display device according to an embodiment;

[0046] Fig. 13C are schematic cross-sectional views illustrating processes of a method of manufacturing a display device according to an embodiment; and

[0047] Fig.13D are schematic cross-sectional views illustrating processes of a method of manufacturing a display device according to an embodiment. DETAILED DESCRIPTION

[0048] The present disclosure and its embodiments can be variously modified and implemented in a variety of different forms. Although some embodiments are disclosed in the drawings and described in the present disclosure, these embodiments should not be limited to the specific forms disclosed. On the contrary, the present disclosure and its embodiments should be interpreted as including all modifications, equivalents or substitutions included in the spirit and scope of the present disclosure.

[0049] The drawings and descriptions are to be considered merely illustrative in nature and therefore do not limit the embodiments described and claimed herein. To describe embodiments of the present invention, some of the parts not associated with the description may not be provided, and the same reference numerals represent the same elements throughout the specification.

[0050] In the drawings, for better understanding and ease of description, the size and thickness of each element are arbitrarily indicated, but the present invention is not limited thereto. In the drawings, for clarity, the thickness of layers, films, panels, regions and other elements may be exaggerated. In the drawings, for better understanding and ease of description, the thickness of some layers and regions may be exaggerated.

[0051] Furthermore, in the specification, the phrase "in a plan view" means when an object portion is viewed from above, and the phrase "in a cross-sectional view" means when a cross section obtained by vertically cutting an object portion is viewed from the side. In addition, the term "overlap" or "overlapping" means that a first object may be above or below a second object, and vice versa.

[0052] Throughout the specification, when an element is referred to as being “connected” to another element, the element may be “directly connected” to the other element or “electrically connected” to the other element with one or more intervening elements interposed therebetween.

[0053] When a layer, film, region, substrate or area is referred to as being "on" another layer, film, region, substrate or area, it may be directly on another film, region, substrate or area, or there may be an intervening film, region, substrate or area between them. Conversely, when a layer, film, region, substrate or area is referred to as being "directly" "on" another layer, film, region, substrate or area, there may not be an intervening layer, film, region, substrate or area between them. In addition, when a layer, film, region, substrate or area is referred to as being "below" another layer, film, region, substrate or area, it may be directly below another layer, film, region, substrate or area, or there may be an intervening layer, film, region, substrate or area between them. Conversely, when a layer, film, region, substrate or area is referred to as being "directly" "below" another layer, film, region, substrate or area, there may not be an intervening layer, film, region, substrate or area between them. Furthermore, "on" or "upper" may include positioning above or below an object and does not necessarily mean a direction based on gravity.

[0054] The same reference numerals always represent the same elements. In the drawings, in order to effectively describe the technical contents, the thickness, proportion and size of the components are exaggerated.

[0055] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In the specification and claims, for the purpose of its meaning and interpretation, the phrase "at least one of..." is intended to include the meaning of "at least one selected from the combination of..." For example, "at least one of A and B" can be understood to mean "A, B, or A and B".

[0056] As used herein, "about" or "approximately" includes the stated value and the mean within an acceptable deviation range of 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 the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0057] It will be understood that, although the terms "first", "second", etc. can be used in this article to describe various elements, components, areas, layers and / or parts, these elements, components, areas, layers and / or parts should not be limited by these terms. These terms are only used to distinguish an element, component, area, layer and / or part from another element, component, area, layer and / or part. For example, when discussing "first element" in the specification, it can be referred to as "second element" or "third element", and "second element" and "third element" can be named in a similar manner without departing from the teachings herein. Unless the context clearly indicates otherwise, as used herein, the singular "one", "an" and "the" are intended to also include plural forms.

[0058] Spatially relative terms such as "below," "beneath," "down," "above," "upper," and the like may be used herein for descriptive purposes to describe the relationship of one element or feature to another element or features as shown in the accompanying drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device shown in the accompanying drawings is turned over, a device that is "below" or "below" another device may be placed "above" the other device. Thus, the illustrative term "below" may encompass both lower and upper positions. The device may also be oriented in other directions, and thus the spatially relative terms may be interpreted differently depending on the orientation.

[0059] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or overly formal sense unless explicitly so defined herein.

[0060] It will also be understood that when used in this specification, the terms "include" and / or "including" specify the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. Hereinafter, a display device and a method for manufacturing the display device according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0061] Figure 1 is a schematic perspective view showing a display device DD according to an embodiment. Figure 1A mobile electronic device is shown as an example of the display device DD. The display device DD may also be applied to large devices such as televisions, monitors, outdoor billboards, and small and medium-sized devices such as personal computers, notebook computers, personal digital assistants, car navigation units, game units, smart phones, tablet computers, cameras, etc. The display device DD may be applied to other electronic devices as long as they do not deviate from the concept of the present disclosure.

[0062] The display device DD may have a hexahedral (box-type) shape having a thickness in a third direction axis DR3 on a plane defined by a first direction axis DR1 and a second direction axis DR2 intersecting the first direction axis DR1. However, the embodiment is not limited thereto, and the display device DD may have various shapes.

[0063] In an embodiment, the upper (or front) surface and the lower (or rear) surface of each member are defined relative to the direction of displaying the image IM. The front surface and the rear surface are opposite to each other on the third directional axis DR3, and the front surface and the lower surface may have a normal direction substantially parallel to the third directional axis DR3.

[0064] The directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 can be defined relative to each other and can be geometrically transformed to align with other directions. In the following, the first direction, the second direction, and the third direction are assigned the same reference numerals as the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3.

[0065] The display device DD may display an image IM through a display surface IS. The display surface IS may include a display area DA and a non-display area NDA adjacent to the display area DA. The image IM is not displayed through the non-display area NDA. The image IM may include a static image or a video image. Figure 1 A plurality of application icons and a clock widget are shown as representative examples of the image IM.

[0066] The display area DA may have a quadrilateral (rectangular) shape. The non-display area NDA may surround the display area DA. However, the embodiment is not limited to the specific shapes of the display area DA and the non-display area NDA. For example, the non-display area NDA may even be completely eliminated from the front surface of the display device DD.

[0067] The display device DD may be flexible. The display device DD may be fully bendable, or may be bendable at the nanoscale (e.g., a few nanometers or a few nanometers). For example, the display device DD may be a curved display device or a foldable display device. However, embodiments are not limited to flexible display devices or bendable display devices, and may also include rigid display devices.

[0068] Figure 2 is an exploded perspective view showing a display device DD according to an embodiment. Figure 2 , the display device DD may include a display panel DP, a light control layer CCL and a low reflection layer LR. Figure 2 Not shown, but the light control auxiliary layer RL (refer to Fig. 9 ) can also be arranged between the light control layer CCL and the low reflection layer LR.

[0069] The display panel DP may include a plurality of pixels PX arranged in an area corresponding to a display area DA of the display device DD. The pixels PX may generate light in response to an electrical signal. The display area DA may display an image IM corresponding to the light generated by the pixels PX. The pixels PX may be arranged in the display area DA to be spaced apart from each other.

[0070] The display panel DP according to the embodiment may be a light-emitting display panel. For example, the display panel DP may include a liquid crystal display panel, an organic light-emitting display panel, or a quantum dot light-emitting display panel. However, the embodiment is not limited to the type of the display panel DP. Hereinafter, an organic light-emitting display panel will be described as an example of the display panel DP.

[0071] The light control layer CCL may include a light control part disposed on the display panel DP and converting light emitted from the display panel DP into light having wavelengths different from each other. Light output from the light control layer CCL may have different colors.

[0072] The low-reflection layer LR may be disposed on the light-control layer CCL, and may reduce the reflectivity of external incident light on the display panel DP, that is, the reflectivity of the low-reflection layer LR is lower than the reflectivity of the display panel DP, and thus, the visibility of the light generated by the display panel DP may be improved. In addition, the low-reflection layer LR may improve the color reproduction range of the light generated by the display panel DP. The low-reflection layer LR may cover the front surfaces of the display panel DP and the light-control layer CCL, and may protect the display panel DP and the light-control layer CCL.

[0073] Figure 3 It is along Figure 1 A schematic cross-sectional view taken along line II'.

[0074] Reference Figure 3 The display device DD includes a display panel DP, a light control layer CCL, and a low reflection layer LR sequentially stacked on each other. The display panel DP may include a base layer BS, a circuit layer DP-CL, and a light emitting element layer DP-OEL sequentially stacked on each other.

[0075] In an embodiment, the low reflection layer LR may include a first color material having a first molar extinction coefficient and a second color material having a second molar extinction coefficient, the second molar extinction coefficient being different from the molar extinction coefficient of the first color material. The functional group of the second color material may be different from the functional group of the first color material. By including two or more types of color materials having different molar extinction coefficients and each having a functional group different from each other, the visibility and color reproduction range of the light generated by the display panel DP may be improved. The low reflection layer LR will be described in more detail below.

[0076] In an embodiment, the base layer BS included in the display panel DP may be rigid or flexible. The base layer BS may be a polymer substrate, a plastic substrate, a glass substrate, a metal substrate, or a composite material substrate. For example, the base layer BS may be a substrate that is flexible and includes a polyimide-based resin. However, the embodiment is not limited by the material included in the base layer BS.

[0077] The circuit layer DP-CL may be provided on the base layer BS. Figure 3 Although not shown in the figure, the circuit layer DP-CL may include transistors. Each of the transistors may include a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL may include a switching transistor and a driving transistor that drives the light emitting element OEL.

[0078] The light emitting element layer DP-OEL may be disposed on the circuit layer DP-CL. The light emitting element layer DP-OEL may include a pixel defining layer PDL, a light emitting element OEL, and an encapsulation layer TFE.

[0079] The light emitting element OEL may include a first electrode EL1, a second electrode EL2 facing the first electrode EL1, and a light emitting layer OL disposed between the first electrode EL1 and the second electrode EL2. Figure 3 Although not shown in the figure, the light emitting element OEL may further include a hole transport region and an electron transport region. The hole transport region may be a region of the layer that transports holes injected from the first electrode EL1 to the light emitting layer OL. The electron transport region may be a region of the layer that transports electrons injected from the second electrode EL2 to the light emitting layer OL. The light emitting element OEL may include a hole transport region, a light emitting layer OL, and an electron transport region sequentially stacked on each other.

[0080] The light emitting element OEL may combine holes injected from the first electrode EL1 with electrons injected from the second electrode EL2 to generate light. For example, the light emitting layer OL may generate blue light. The light emitting element layer DP-OEL may output light from the light emitting layer OL through the front surface of the display device DD.

[0081] The pixel defining layer PDL may be disposed on the circuit layer DP-CL. The pixel defining layer PDL may be provided with an opening defined therethrough. The openings defined by the pixel defining layer PDL may correspond to the light emitting area PXA-1, the light emitting area PXA-2, and the light emitting area PXA-3, respectively. The pixel defining layer PDL may correspond to the non-light emitting area NPXA.

[0082] The pixel defining layer PDL may include an organic resin or an inorganic material. For example, the pixel defining layer PDL may include a polyacrylate-based resin, a polyimide-based resin, a silicon nitride (SiN x ), silicon oxide (SiO x ) or silicon oxynitride (SiO x N y ).

[0083] The light-emitting region PXA-1, the light-emitting region PXA-2, and the light-emitting region PXA-3 may have sizes different from each other. For example, according to the color of the light emitted therethrough, the light-emitting region PXA-1, the light-emitting region PXA-2, and the light-emitting region PXA-3 may have sizes different from each other. Since each light-emitting region has a size suitable for the color of the light emitted therethrough, the light efficiency may be uniform over various colors. However, the embodiment is not limited thereto, and the light-emitting region PXA-1, the light-emitting region PXA-2, and the light-emitting region PXA-3 may have the same size as each other.

[0084] The encapsulation layer TFE may be disposed on the light emitting element OEL to encapsulate the light emitting element OEL. The encapsulation layer TFE may protect the light emitting element OEL from moisture and oxygen, and may protect the light emitting element OEL from foreign substances such as dust particles.

[0085] Figure 3 The encapsulation layer TFE is shown as a single layer, however, the encapsulation layer TFE may include at least one organic layer or an inorganic layer, or may include an organic layer and an inorganic layer. For example, the encapsulation layer TFE may also have a structure in which organic layers and inorganic layers are alternately stacked on each other, or a structure in which an inorganic layer, an organic layer, and another inorganic layer are sequentially stacked on each other.

[0086] The inorganic layer included in the encapsulation layer TFE may include a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer, but it should not be limited thereto. The organic layer may include an acrylic-based organic layer, but it should not be limited thereto.

[0087] The light-controlling layer CCL may be disposed on the encapsulation layer TFE included in the display panel DP. An overcoat layer may also be disposed between the encapsulation layer TFE and the light-controlling layer CCL. The overcoat layer may be a planarization layer or a buffer layer.

[0088] The light-control layer CCL may include first, second, and third light-control parts CCP1, CCP2, and CCP3, and a barrier wall BK. The first, second, and third light-control parts CCP1, CCP2, and CCP3 may be spaced apart from each other by the barrier wall BK.

[0089] At least one of the first light-controlling part CCP1, the second light-controlling part CCP2, and the third light-controlling part CCP3 may include quantum dots. The quantum dots may convert the wavelength of light generated by the light-emitting element OEL.

[0090] The first light control part CCP1 may include red quantum dots and may convert blue light into red light. The second light control part CCP2 may include green quantum dots and may convert blue light into green light. The third light control part CCP3 may transmit blue light. The third light control part CCP3 may be formed of a transparent resin, or may further include a blue pigment or a blue dye.

[0091] The first light-controlling part CCP1, the second light-controlling part CCP2, and the third light-controlling part CCP3 may further include a scatterer to improve the light emitting efficiency of the display device DD. The scatterer may be a material that scatters light in all directions and may include TiO 2 、ZrO 3 、Al 2 O 3 、SiO 2 、MgO、In 2 O 3 、ZnO、SnO 2 , Sb 2 O 3 and SiO 2 At least one of .

[0092] The blocking wall BK may correspond to the boundary between the first light-controlling part CCP1, the second light-controlling part CCP2, and the third light-controlling part CCP3. In a plan view, the blocking wall BK may overlap the non-light-emitting area NPXA. The blocking wall BK may prevent the occurrence of light leakage. The blocking wall BK may include an organic light-blocking material, a black pigment, or a black dye.

[0093] In an embodiment, a low reflection layer LR may be disposed on the light control layer CCL. The low reflection layer LR disposed on the light control layer CCL may improve the color reproduction range of light emitted from the first light control part CCP1, the second light control part CPP2, and the third light control part CCP3 and having different wavelength ranges and different colors from each other. In addition, the low reflection layer LR may reduce the reflectivity relative to the incident external incident light, and thereby improve the visibility of the display device DD relative to the external light. The low reflection layer LR may also cover and protect the light control layer CCL and other components disposed under the low reflection layer LR.

[0094] The low reflection layer LR may include a first color material and a second color material having different functional groups. For example, the first color material may include at least one of an anthraquinone-based compound, a phthalocyanine-based compound, an azo-based compound, a perylene-based compound, an xanthene-based compound, a diimonium-based compound, and a dipyrromethene-based compound. The second color material may include at least one of a porphyrazine-based compound, a porphyrin-based compound, a squarylium-based compound, an oxazine-based compound, a triarylmethane-based compound, and a cyanine-based compound.

[0095] In another example, the first color material may include at least one of an anthraquinone-based compound, a phthalocyanine-based compound, and an azo-based compound, and the second color material may include at least one of a porphyrazine-based compound, a porphyrin-based compound, a squarylium-based compound, and a cyanine-based compound. However, embodiments should not be limited to these specific compounds for the first color material and the second color material.

[0096] The functional group of the compound can affect its molar extinction coefficient and its extinction wavelength range. The first color material and the second color material having different functional groups from each other can have different molar extinction coefficients and different maximum absorption wavelength ranges.

[0097] Functional groups refer to specific atomic groups or structures that play an important role in determining the properties of a compound. One of the functional groups of a color material may include a chromophoric group responsible for the color of the compound that may be included. For example, the functional group may include anthraquinone, phthalocyanine, azo, perylene, xanthene, diimonium, dipyrromethene, porphyrin, squarylium, oxazine, triarylmethane, cyanine, etc. The color material with a specific functional group structure may be named as a compound based on a specific material. For example, a compound with an anthraquinone structure may be referred to as an anthraquinone-based compound.

[0098] In an embodiment, the first color material and the second color material may have different molar extinction coefficients from each other. The first color material may have a first molar extinction coefficient, the second color material may have a second molar extinction coefficient, and the first molar extinction coefficient may be less than the second molar extinction coefficient. The first molar extinction coefficient may be equal to or greater than about 10 3 M -1 cm -1 and less than about 10 5 M -1 cm -1 , and the second molar extinction coefficient may be equal to or greater than about 10 5 M -1 cm -1 .

[0099] The maximum absorption wavelength range of the second color material may be less than the maximum absorption wavelength range of the first color material. The second color material having a molar extinction coefficient greater than the molar extinction coefficient of the first color material may have a maximum absorption wavelength range corresponding to a portion (or subset) of the maximum absorption wavelength range of the first color material. For example, the maximum absorption wavelength range of the first color material may be equal to or greater than about 500 nm and equal to or less than about 650 nm, and the maximum absorption wavelength range of the second color material may be equal to or greater than about 550 nm and equal to or less than about 630 nm.

[0100] Since the first color material absorbs a wider range of light than the second color material, the first color material can reduce reflectivity in a wider wavelength range than the second color material. Since the second color material has a larger molar extinction coefficient than the first color material, the second color material can have a greater reduction in reflectivity in a specific wavelength range that is smaller than the specific wavelength range of the first color material. In addition, the second color material can reduce the transmittance of a specific wavelength range, and thus can improve the color reproduction range. For example, the second color material can reduce the transmittance of light corresponding to a wavelength range between the peak wavelengths of green light and red light emitted from a display device, and output light with a more vivid color.

[0101] In an embodiment, the first color material and the second color material may include one or more compounds that satisfy the previous molar extinction coefficient and the maximum absorption wavelength range. The first color material may include a compound different from the compound included in the second color material. The first color material may include a compound having the same functional group but a different substituent, and the second color material may include a compound having the same functional group but a different substituent. The functional group of the compound of the first color material may be different from the functional group of the compound of the second color material. The first color material may include two or more compounds having functional groups different from each other and having 10 3 M -1 cm -1 or greater and 10 5 M -1 cm -1 The second color material may also include two or more compounds having functional groups different from each other and having 10 5 M - 1 cm -1 or a second molar extinction coefficient greater than.

[0102] In an embodiment, the first color material may include anthraquinone-based compounds having different substituents. In another embodiment, the compound included in the first color material may include an anthraquinone-based compound and a phthalocyanine-based compound.

[0103] In an embodiment, in the low-reflection layer, the content of the first color material may be less than the content of the second color material. The content of the second color material having a molar extinction coefficient greater than the molar extinction coefficient of the first color material may be greater than the content of the first color material. For example, the content of the first color material may be equal to or greater than about 2% of the content of the second color material, and equal to or less than about 50% of the content of the second color material. The ratio of the content of the first color material to the second color material in the low-reflection layer may be about 0.02:1 to about 0.5:1. When the content of the first color material is less than about 2% of the content of the second color material, the light absorptivity of a relatively wide wavelength range is reduced, and the reflectivity of external light can be reduced less. When the content of the first color material is greater than about 50% of the content of the second color material, the amount of light absorbed by the second color material is reduced, and the improvement of the color reproduction range by the second color material is reduced.

[0104] In an embodiment, the low reflection layer LR may have an overall shape (or an integral structure) and may cover the light control layer CCL. For example, the low reflection layer LR may have an overall plate shape (or a single layer shape). In other embodiments, the low reflection layer LR may include a base portion BM (refer to Figure 4A ) and from the base part BM (refer to Figure 4A ) protruding and spaced apart from each other (refer to Figure 4A ). Protrusion PM (refer to Figure 4A ) can have various three-dimensional shapes. Figure 4A ) can have a convex shape with a curved surface. For example, the cross section of the protrusion PM can have a parabolic shape, a semicircular shape or a semi-elliptical shape. The protrusion PM can also have a cylindrical shape or a prismatic shape.

[0105] FIG. 4A to FIG. 4C A schematic cross-sectional view of a low reflection layer LR according to an embodiment is shown. The low reflection layer LR may include a base portion BM and a protrusion PM, and the protrusion PM may have various shapes.

[0106] Figure 4A An embodiment is shown in which the protrusion PM may include a curved surface on the front (upper) surface and may have an upward convex shape. In a cross-sectional view, the protrusion PM may have a parabolic shape. The inclination (slope) of the tangent of the parabolic shape may gradually decrease from the point where the base part BM contacts the protrusion PM to the highest point of the protrusion PM. Figure 4B An embodiment is shown in which the protrusion PM may have a hemispherical shape. In a cross-sectional view, the protrusion PM may have a semicircular shape. Figure 4C In the embodiment shown in , the protrusion PM may have a cylindrical shape or a prismatic shape. In a cross-sectional view, the protrusion PM may have a quadrilateral (rectangular) shape.

[0107] The implementation is not limited to FIG. 4A to FIG. 4C The examples shown in , and the protrusion PM may have other shapes.

[0108] In an embodiment, the base portion BM and the protrusion PM may be integrally formed of the same material with each other. For example, the base portion BM and the protrusion PM may include the same base resin and the same first and second color materials.

[0109] Figure 5 Show Figure 4A FIG. 2 is an enlarged schematic cross-sectional view of a region AA of the low reflection layer LR in FIG. Figure 5 The width WD and height HI of the protrusion PM are shown. The protrusion PM may have a shape in which the width WD may decrease in the third directional axis DR3. Figure 5In the embodiment, the protrusion PM may have a parabolic shape in a cross-sectional view. The width WD of the protrusion PM may be defined as its maximum width on the first direction axis DR1. In other embodiments, when the protrusion PM has a hemispherical shape, the width WD may be the diameter of the spherical shape. The height HI may be the distance between the surface of the base part BM in contact with the protrusion PM and the highest point of the protrusion PM on the third direction axis DR3.

[0110] In an embodiment, the protrusion PM may have a size ranging from about 10 nanometers to about several hundred nanometers. For example, the width WD of the protrusion PM may be equal to or greater than about 10 nm and equal to or less than about 200 nm, and the height HI of the protrusion PM may be equal to or greater than about 10 nm and equal to or less than about 200 nm.

[0111] The distance between adjacent protrusions may be in the range of about 10 nanometers to about several hundred nanometers. Figure 5 , a minimum distance DI between protrusions adjacent to each other among the protrusions PM may be equal to or greater than about 10 nm and equal to or less than about 200 nm.

[0112] When the protrusions PM having a nano-scale size are arranged at intervals shorter than the wavelength of light, the light can appear as if the low-reflection layer LR is a single medium. The protrusions PM can prevent the generation of diffraction waves, and the effective refractive index can gradually change or transform. Therefore, the protrusions PM can reduce the reflectivity of external light.

[0113] When the height HI of the protrusion PM exceeds about 200 nm, the reflectivity of the protrusion PM to external light decreases less and the low reflection layer LR may become thicker. When the low reflection layer LR disposed on the front surface of the display panel DP receives an impact applied to the display device DD, the protrusion PM may be damaged.

[0114] Figure 6 is a plan view showing a low reflection layer LR according to an embodiment, and Figure 7 A perspective view showing a low reflection layer LR according to an embodiment is shown. Figure 6 and Figure 7 A protrusion PM is shown having a cylindrical shape (among various possible shapes) according to an embodiment. Figure 6 and Figure 7 , the protrusions PM included in the low reflection layer LR may be arranged in a pattern on the base part BM at regular intervals or according to a specific rule.

[0115] Figure 8is a graph showing reflectance as a function of the wavelength range of the display device according to the embodiment example and the comparative examples 1 and 2. The horizontal axis of the graph represents the wavelength of the external light, and the vertical axis represents the reflectance of the light expressed as a percentage measured by the Specular Component Included (SCI) method. Figure 3 As shown in , Embodiment Example 1, Comparative Example 1, and Comparative Example 2 have the same configuration except for the low reflection layer.

[0116] Embodiment example 1 includes a low-reflection layer having a first color material and a second color material and a nano-pattern shape. Comparative example 1 includes a low-reflection layer having only a first color material and formed as a single layer without a nano-pattern shape. Comparative example 2 includes a low-reflection layer having only a first color material and a nano-pattern shape. The first color material is an anthraquinone-based compound, and the second color material is a tetraazaporphyrin-based compound. In embodiment example 1, the content of the first color material is about 50% of the content of the second color material.

[0117] according to Figure 8 , when compared with the light reflectances of Comparative Examples 1 and 2 across the entire wavelength range corresponding to the visible light region, the light reflectance of Embodiment Example 1 is reduced. The light reflectance of Embodiment Example 1 is further reduced in the wavelength range from about 500 nm to about 650 nm, wherein the reduction in the range from about 550 nm to about 630 nm is greater. In the wavelength range of about 600 nm, the light reflectance is close to about 0%.

[0118] Comparative Examples 1 and 2 include only the first color material, whereas Embodiment Example 1 includes the first color material and the second color material having different functional groups and different molar extinction coefficients from each other. When Embodiment Example 1 and Comparative Example 2, both of which include a nano-pattern shape, are compared, the reflectivity of Embodiment Example 1 is more significantly reduced than that of Comparative Example 2. Therefore, when the low-reflection layer includes the first color material and the second color material having different molar extinction coefficients and different functional groups, the light reflectivity is reduced over the entire visible wavelength range.

[0119] In Embodiment Example 1, the light reflectance is significantly reduced in a wavelength range from about 500 nm to about 650 nm, which wavelength range includes the maximum absorption wavelength range of the first color material and the second color material. The light reflectance of Embodiment Example 1 is further reduced in a wavelength range from about 550 nm to about 630 nm by the second color material having a content and a molar extinction coefficient greater than that of the first color material. The second color material can also improve the color reproduction range by significantly reducing the reflectance in the wavelength range corresponding to the peak wavelength region of green light and the peak wavelength region of red light.

[0120] The shape of the low-reflection layer can affect the light reflectivity. Comparative Example 1 includes a low-reflection layer formed as a single layer, while Comparative Example 2 and Implementation Example 1 include a nano-pattern shape. When the value of the light reflectivity of each of Implementation Example 1 and Comparative Example 2 is compared with the value of the light reflectivity of Comparative Example 1, the light reflectivity of each of Implementation Example 1 and Comparative Example 2 is reduced (lower) in the entire wavelength range corresponding to the visible light region (across the entire visible light wavelength range). The protrusions included in the low-reflection layer are arranged at intervals shorter than the wavelength of light, and thus reduce the reflectivity of external light.

[0121] Through the light reflectivity of embodiment example 1, it is observed that the low-reflective layer including the first color material and the second color material having different molar extinction coefficients, different maximum absorption wavelength ranges, different contents and different functional groups reduces the reflectivity of external light of the display device and improves the color reproduction range. In addition, the low-reflective layer having a nano-pattern shape further reduces the reflectivity of external light.

[0122] As the color reproduction range is improved, a wider variety of colors and colors close to nature (i.e., colors that look natural) can be displayed. Compared with the color reproduction range of a display device that does not include a low-reflection layer, the color reproduction range of a display device DD including a low-reflection layer LR having a first color material and a second color material according to an embodiment can be improved by about 9% (or to about 109.3%). A display device with improved reliability can be provided to users by including a low-reflection layer of a first color material and a second color material.

[0123] The color material included in the low-reflection layer LR can reduce the transmittance of light in the wavelength range from about 500 nm to about 650 nm, and can further reduce the transmittance of light in the wavelength range from about 550 nm to about 630 nm. The transmittance of light corresponding to the peripheral wavelength region between the peak wavelengths of the green light and the red light output by the display device DD can be significantly reduced. By including the color material in the low-reflection layer LR, green light and red light close to pure color can be output from the display device DD, and the color reproduction range of the display device DD can be improved.

[0124] Fig. 9 is a schematic cross-sectional view showing a display device DD-1 according to an embodiment. The display device DD-1 may further include a light control auxiliary layer RL disposed between the light control layer CCL and the low reflection layer LR. The light control auxiliary layer RL may improve the luminous efficiency of light output from the display panel DP.

[0125] Fig.10 2 is a schematic cross-sectional view showing a light control auxiliary layer RL according to an embodiment. The light control auxiliary layer RL may include a transflective layer MTL and a phase control layer PA sequentially stacked on each other.

[0126] The transflective layer MTL may have transflective properties of both transmitted light and reflected light. When light emitted from the display panel DP is not converted into light having a different wavelength range in the first light control part CCP1, the second light control part CCP2, and the third light control part CCP3, the transflective layer MTL may reflect the light back to the first light control part CCP1, the second light control part CCP2, and the third light control part CCP3. The transflective layer MTL may reduce the possibility that light that is not converted in the first light control part CCP1, the second light control part CCP2, and the third light control part CCP3 is emitted as is or extinguished, and thus the luminous efficiency of light emitted from the display device DD-1 may be improved.

[0127] The transflective layer MTL may be a metal layer. The transflective layer MTL may include Cr, Mo, Co, Pt, Ag, Al, Au, Ti, Cu, Fe, Ni, or an alloy thereof.

[0128] The phase control layer PA may be disposed on the transflective layer MTL. The phase control layer PA may include at least one inorganic layer. Fig.10 As shown in , the phase control layer PA may include a plurality of inorganic layers IO1 and IO2 sequentially stacked on each other.

[0129] The phase control layer PA uses light absorption and optical extinction (destructive) interference, and together with the transflective layer MTL, ensures that the light output from the display panel is converted into light within a desired wavelength range when passing through the light control portion. The phase control layer PA can absorb and / or offset external light to reduce the reflectivity of the external light.

[0130] The inorganic layers IO1 and IO2 included in the phase control layer PA may include different types of inorganic materials. For example, the first inorganic layer IO1 disposed on the transflective layer MTL may include MTO, and the second inorganic layer IO2 may include ITO. However, embodiments are not limited to these specific materials for the inorganic layers IO1 and IO2.

[0131] Depending on the material and thickness of the transflective layer MTL and the phase control layer PA, the degree of improvement in luminous efficiency may be different. The transflective layer MTL may include Ag and may have a thickness of about 5 nm to about 15 nm, the first inorganic layer IO1 may include MTO and may have a thickness of about 30 nm to about 40 nm, and the second inorganic layer IO2 may include ITO and may have a thickness equal to or less than about 30 nm, or may be omitted. However, the embodiment is not limited thereto.

[0132] Reference Figure 3 and Fig.10 At least one of the first light-controlling part CCP1, the second light-controlling part CCP2 and the third light-controlling part CCP3 may include quantum dots. The quantum dots may be semiconductor nanocrystals selected from II-VI group compounds, III-VI group compounds, III-V group compounds, IV-VI group compounds, IV group elements, IV group compounds, I-III-VI group compounds or combinations thereof.

[0133] The II-VI compound may be selected from a binary compound, a ternary compound, and a quaternary compound, the binary compound being selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof, the ternary compound being selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZ nS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; the quaternary compound is selected from the group consisting of CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0134] The III-VI compounds may include In 2 S 3 or In 2 Se 3 Binary compounds, InGaS 3 or InGaSe 3 A ternary compound, or a combination thereof.

[0135] The III-V compound can be selected from binary compounds, ternary compounds and quaternary compounds. The binary compound is selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof. The ternary compound is 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. The quaternary compound is selected from the group consisting of GaAlNAs, GAlNP, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0136] The III-V compounds may also include Group II metals, such as InZnP.

[0137] The IV-VI group compound can be selected from a binary compound, a ternary compound and a quaternary compound, the binary compound is selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof, the ternary compound is selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof, and the quaternary compound is selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The IV group element can be selected from the group consisting of Si, Ge and mixtures thereof. The IV group compound can be a binary compound selected from the group consisting of SiC, SiGe and mixtures thereof.

[0138] The I-III-VI group compounds may include AgInS, AgInS 2 、CuInS、CuInS 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 Or a ternary compound of any combination thereof.

[0139] The binary compound, ternary compound, or quaternary compound may be present in a particle at a uniform concentration, or they may be present in the same particle after being divided into parts having different concentrations.

[0140] Each quantum dot may have a core-shell structure including a core and a shell surrounding the core. A quantum dot may have a core-shell structure in which one quantum dot surrounds another quantum dot. In a core-shell structure, the concentration of an element present in the shell may have a concentration gradient that may decrease toward the core.

[0141] The shell of a quantum dot may include a metal or non-metal oxide, a semiconductor compound, or a combination thereof.

[0142] Metal or non-metal oxides for the shell include SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 or binary compounds of NiO, such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 or CoMn 2 O 4 However, the embodiment is not limited thereto.

[0143] The semiconductor compound includes CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, ALP, or AlSb. However, the embodiment is not limited thereto.

[0144] Quantum dots can control the color of the light emitted depending on their particle size. Quantum dots can have various emission colors such as green and red. As the particle size of the quantum dots decreases, the wavelength of the light emitted from the quantum dots becomes shorter. The particle size of quantum dots that emit green light can be smaller than the particle size of quantum dots that emit red light.

[0145] Fig.11 1 is a flowchart showing a method of manufacturing a display device according to an embodiment of the present invention. The manufacturing method includes providing a display panel (S10), providing a light control layer on the display panel (S20), and providing a low reflection layer on the light control layer (S30).

[0146] The manufacturing method according to the embodiment may further include providing a light-controlling auxiliary layer after providing the light-controlling layer ( S20 ). The low-reflection layer may be disposed on the light-controlling auxiliary layer.

[0147] The display panel, the light-control layer, and the light-control auxiliary layer provided by the method for manufacturing the display device according to the embodiment may be used together with Figure 3 , Fig. 9 and Fig.10 The display panel DP, the light-control layer CCL and the light-control auxiliary layer RL described in are substantially the same.

[0148] Providing the low reflection layer (S30) may include providing a low reflection layer composition including a base resin, a first color material, and a second color material. The first color material and the second color material may be substantially the same as the aforementioned first color material and the second color material.

[0149] In the low reflection layer composition LR-a (refer to Fig.13A ), the content of the second color material may be greater than the content of the first color material. For example, the content of the first color material may be equal to or greater than about 2% of the content of the second color material and equal to or less than about 50% of the content of the second color material.

[0150] The molar extinction coefficient of the second color material can be greater than the molar extinction coefficient of the first color material. For example, the molar extinction coefficient of the first color material is equal to or greater than about 10 3 M -1 cm -1 and less than about 10 5 M -1 cm -1 , and the molar extinction coefficient of the second color material is equal to or greater than about 10 5 M -1 cm -1 .

[0151] The maximum absorption wavelength range of the second color material may be narrower than the maximum absorption wavelength range of the first color material. For example, the maximum absorption wavelength range of the first color material may be equal to or greater than about 500 nm and equal to or less than about 650 nm, and the maximum absorption wavelength range of the second color material may be equal to or greater than about 550 nm and equal to or less than about 630 nm.

[0152] Fig.12 is a flowchart illustrating a process of providing a low-reflection layer ( S30 ) of the method for manufacturing a display device according to an embodiment. FIG. 13A to FIG. 13D2 is a schematic cross-sectional view showing a process of a method for manufacturing a display device. Providing a low-reflection layer may include coating a low-reflection layer composition (S301), pressing the coated low-reflection layer composition with a master mold (S302), irradiating light onto the master mold (S303), and separating the master mold (S304).

[0153] Fig.13A 2 is a schematic cross-sectional view showing coating of a low reflection layer composition LR-a on a light control layer CCL. The low reflection layer composition LR-a may be coated on the light control layer CCL to form a low reflection layer LR (refer to Fig.13D ). The low reflection layer composition LR-a may include a base resin, a first color material, and a second color material. The base resin may be a photocurable resin.

[0154] The content of the first color material and the second color material included in the low-reflection layer composition LR-a may be equal to or greater than about 0.2% of the total content of the low-reflection layer composition and equal to or less than about 5% of the total content of the low-reflection layer composition. The content of the first color material and the second color material may be adjusted to achieve improvement in the color reproduction range and reduction in the reflectivity of external light without reducing the light efficiency of the display device.

[0155] The low reflection layer composition LR-a may further include a release agent for easily removing the master mold, a photoinitiator for initiating a photocuring reaction, and / or a spreading control material for preventing the low reflection layer composition LR-a from spreading and flowing.

[0156] Fig. 13B 2 is a schematic cross-sectional view showing a process of pressing the low reflection layer composition LR-a with a master mold MM. The master mold MM may be disposed on the coated low reflection layer composition LR-a, and the master mold MM may be pressed toward the low reflection layer composition LR-a.

[0157] The master mold MM may have a different shape depending on the shape of the low reflection layer LR to be formed. When the low reflection layer LR includes a protrusion PM, the master mold MM may have a groove OP defined to correspond to the protrusion PM. The master mold MM may provide a mold to form the low reflection layer LR. When the coated low reflection layer composition LR-a is pressed by the master mold MM, the groove OP of the master mold MM may be filled with the low reflection layer composition LR-a.

[0158] The master mold MM may include a photocurable resin. Using the master mold MM including the photocurable resin may be more economical than repeatedly reusing the silicon wafer master mold.

[0159] Fig. 13C2 is a schematic cross-sectional view showing a process of irradiating light onto the master mold MM to form a low reflection layer LR. After pressing the master mold MM, when light from a light source LS is irradiated onto the master mold MM, the low reflection layer composition LR-a may be cured by light. When the low reflection layer composition LR-a is cured, a low reflection layer LR may be formed. The light irradiated onto the master mold MM may be ultraviolet light.

[0160] The low reflection layer LR may include a base portion BM and a protrusion PM protruding from the base portion BM, the protrusion PM being formed by the shape of the master mold MM. The low reflection layer LR may be patterned by pressing the master mold MM and irradiating light. The low reflection layer LR formed by the method of manufacturing a display device according to the present embodiment may include protrusions PM arranged at regular intervals to form a pattern.

[0161] Fig.13D 2 is a cross-sectional view showing a process of separating the master mold MM. When the master mold MM is separated from the low reflection layer LR, the display device DD according to the embodiment can be manufactured. When a release agent is further added to the low reflection layer composition LR-a, the master mold MM can be more easily separated.

[0162] Despite Figures 11 to 13D Although not shown in the figure, the manufacturing method according to the embodiment may further include providing a light control auxiliary layer on the light control layer. The low reflection layer composition LR-a may be coated on the light control auxiliary layer. Fig.12 According to the step for providing a low reflection layer shown in , a low reflection layer is disposed on the light control auxiliary layer.

[0163] Fig.11 A method of manufacturing a display device according to an embodiment shown in includes providing a low-reflection layer which improves a color reproduction range of the display device and reduces reflectivity of external light, and thus improves reliability of the display device.

[0164] supply Fig.12 The low reflection layer according to the embodiment shown in can be performed in an environment of room temperature and pressure. There is no risk of damaging the display device due to a manufacturing environment such as low temperature, high temperature or high pressure. The low reflection layer according to the embodiment can be provided in a simple and economical manner.

[0165] A display device according to an embodiment may include a low-reflection layer, which includes a plurality of color materials having different functional groups and improving the color reproduction range and the visibility of the display device to external light. The color material with a relatively wide maximum absorption wavelength range reduces the reflectivity in a wide wavelength range. The color material with a smaller maximum absorption wavelength range has a relatively large molar extinction coefficient and a relatively large content. The transmittance of light in a smaller wavelength range is further reduced, and the color reproduction range is improved. In addition, the low-reflection layer includes a protrusion that further reduces the reflectivity of the external light on the display device.

[0166] According to the manufacturing method in the embodiment, a display device having an improved color reproduction range and improved visibility to external light may be simply and economically manufactured using a master mold in a room temperature and pressure environment.

[0167] Although the embodiments of the present disclosure have been described, it should be understood that the present disclosure should not be limited to these embodiments, but various changes and modifications may be made by one of ordinary skill in the art within the spirit and scope of the present disclosure as hereinafter claimed.

[0168] Therefore, the disclosed subject matter should not be limited to any single embodiment described herein, and the scope of the inventive concept should be determined in accordance with the appended claims.

Claims

1. A display device, comprising: Display panel; A light control layer, disposed on the display panel; as well as A low reflection layer is disposed on the light control layer, and the low reflection layer comprises: a first color material having a first molar extinction coefficient; and A second color material has a second molar extinction coefficient, and a functional group of the second color material is different from a functional group of the first color material, wherein: The first molar extinction coefficient is less than the second molar extinction coefficient, The content of the first color material is less than the content of the second color material, and The maximum absorption wavelength range of the second color material is within the maximum absorption wavelength range of the first color material.

2. The display device according to claim 1, wherein: The first molar extinction coefficient is equal to or greater than 10 3 M -1 cm -1 and less than 10 5 M -1 cm -1 ,as well as The second molar extinction coefficient is equal to or greater than 10 5 M -1 cm -1 .

3. The display device according to claim 1, wherein: The maximum absorption wavelength range of the first color material is equal to or greater than 500 nm and equal to or less than 650 nm, and The maximum absorption wavelength range of the second color material is equal to or greater than 550 nm and equal to or less than 630 nm.

4. The display device according to claim 1, wherein: The content of the first color material is equal to or greater than 2% and equal to or less than 50% of the content of the second color material.

5. The display device according to claim 1, wherein: The low reflection layer comprises: The basic part; and Protrusions protrude from the base portion and are spaced apart from each other.

6. The display device according to claim 5, wherein: Each of the protrusions has a width equal to or greater than 10 nm and equal to or less than 200 nm and a height equal to or greater than 10 nm and equal to or less than 200 nm.

7. The display device according to claim 5, wherein: The shortest distance between adjacent ones of the protrusions is equal to or greater than 10 nm and equal to or less than 200 nm.

8. The display device according to claim 5, wherein: Each of the protrusions has at least one of an upward convex shape with a curved surface, a hemispherical shape, a cylindrical shape, and a prismatic shape.

9. The display device according to claim 1, further comprising a light control auxiliary layer disposed between the light control layer and the low reflection layer, the light control auxiliary layer comprising: Transflective layer; as well as a phase control layer disposed on the transflective layer, and The transflective layer includes a metal layer, and the phase control layer includes at least one inorganic layer.

10. A display device, comprising: Display panel; A light control layer, disposed on the display panel; as well as A low reflection layer is disposed on the light control layer, and the low reflection layer comprises: a first color material comprising one or more compounds; and The second color material includes one or more compounds, wherein The first color material includes at least one of an anthraquinone-based compound, a phthalocyanine-based compound, and an azo-based compound, and The second color material includes at least one of a porphyrazine-based compound, a porphyrin-based compound, a squarylium-based compound, and a cyanine-based compound, The maximum absorption wavelength range of the second color material is within the maximum absorption wavelength range of the first color material.

Images