Display device and manufacturing method for a display device

Abstract

This application relates to a display device comprising a light-emitting element layer and a light control layer. The light control layer may include: a plurality of separate spacer members; a color control member between the spacer members, the color control member comprising quantum dots and first scattering particles; and a coating covering the sides of the spacer members adjacent to the color control member. The coating comprises at least one selected from substituted dispersants and substituted scattering particles, and each of the substituted dispersants and the substituted scattering particles may contain at least one substituent selected from amine groups and carboxyl groups. The amine groups and carboxyl groups contained in the coating may differ in number from each other.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0069437, filed on June 9, 2020 with the Korean Intellectual Property Office (KIPO), the entire contents of which are incorporated herein by reference. Technical Field

[0003] One or more embodiments of this disclosure relate to a display device and a method of manufacturing a display device, and more specifically, to a display device including a coating and a method of manufacturing a display device including a coating. Background Technology

[0004] Various electronic devices are being developed to provide image information in multimedia devices, including televisions, mobile phones, tablet computers, navigators, and game consoles. In particular, quantum dots and the like are being used to improve display quality in electronic devices, including liquid crystal displays and organic electroluminescent devices.

[0005] In addition, methods for improving the emission efficiency of such electronic devices were investigated. Summary of the Invention

[0006] One or more embodiments of this disclosure relate to a display device that includes a coating and has improved emission efficiency.

[0007] Furthermore, one or more embodiments of this disclosure also relate to a method for manufacturing a display device with improved emission efficiency by including an action of forming a coating on the sides of a spacer member.

[0008] In one embodiment, a display device is provided, comprising: a light-emitting element layer; and a light control layer on the light-emitting element layer, wherein the light control layer comprises: a plurality of separate spacer members; a color control member between the spacer members, the color control member comprising quantum dots and first scattering particles; and a coating covering the side of the spacer members adjacent to the color control member, the coating comprising at least one selected from a substituted dispersant and substituted scattering particles, the substituted dispersant comprising at least one substituent selected from amine groups and carboxyl groups, the substituted scattering particles comprising at least one substituent selected from amine groups and carboxyl groups, and wherein the amine groups and the carboxyl groups contained in the coating are different in number from each other.

[0009] In an embodiment, the coating may contain the substituted dispersant and not the substituted scattering particles, and the coating may contain second scattering particles on the substituents that are different from the substituted scattering particles.

[0010] In an embodiment, the second scattering particle may include at least one selected from TiO2, Ag and Al.

[0011] In an embodiment, the substituted dispersant may comprise a polymer resin substituted with at least one selected from amine and carboxyl groups.

[0012] In the embodiments, the polymer resin may be at least one selected from polyurethane resin, polyethylene resin, polyacrylic resin, polyepoxy resin and polyester resin.

[0013] In an embodiment, the coating may not contain the substituted dispersant but may contain the substituted scattering particles.

[0014] In an embodiment, the surface of the first scattering particle may be replaced by a ligand comprising at least one selected from amine groups and carboxyl groups, and the amine groups and carboxyl groups at the surface of the first scattering particle may be different from each other in number.

[0015] In an implementation scheme, the first scattering particle and the substituted scattering particle may be the same.

[0016] In an embodiment, the coating may further comprise a monomer, and the monomer may be a urethane monomer, an ethylene monomer, an acrylic monomer, an epoxy monomer, or an ester monomer.

[0017] In one embodiment, the coating may contact the color control component.

[0018] In one embodiment, the spacer wall component of the plurality of separate spacer wall components can be separated from the color control component by the coating between the spacer wall component and the color control component.

[0019] In embodiments of this disclosure, a method for manufacturing a display device is provided, comprising: forming a color filter layer; and forming a light control layer, wherein the formation of the light control layer comprises: forming a plurality of spacer members including spacer members; providing an initial coating between the spacer members, the initial coating comprising at least one selected from substituted dispersants and substituted scattering particles, the substituted dispersant comprising at least one substituent selected from amine groups and carboxyl groups, the substituted scattering particles comprising at least one substituent selected from amine groups and carboxyl groups; forming a coating covering the sides of the spacer members by providing vacuum and heat to the initial coating; and forming a color control component comprising quantum dots and first scattering particles between the spacer members on which the coating is formed, wherein the amine groups and the carboxyl groups contained in the initial coating are different in number from each other.

[0020] In an embodiment, the initial coating may further contain a solvent, and the solvent may be removed as the coating is formed.

[0021] In an embodiment, the solvent may include at least one selected from PGMEA, DMA, GBL, CHA, and DPMA.

[0022] In the implementation scheme, the boiling point of the solvent can be from about 50°C to about 250°C.

[0023] In an embodiment, the initial coating may contain the substituted dispersant and not the substituted scattering particles, and the initial coating may contain second scattering particles on the substituents that are different from the substituted scattering particles.

[0024] In the implementation, the second scattering particles may be greater than about 0 wt% to less than about 5 wt%, based on the total weight of the initial coating.

[0025] In an embodiment, the initial coating may not contain the substituted dispersant but may contain the substituted scattering particles.

[0026] In an implementation, the initial coating may further comprise monomers, and the monomers may be applied together with a thermosetting agent or a photocuring agent.

[0027] In the implementation, the monomer may be greater than about 0 wt% to less than about 5 wt%, based on the total weight of the initial coating. Attached Figure Description

[0028] The accompanying drawings are included to provide a further understanding of this disclosure, and are incorporated in and form part of this specification. The drawings illustrate exemplary embodiments of this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0029] Figure 1 This is a perspective view showing the display device of the embodiment;

[0030] Figure 2 It shows the corresponding Figure 1 A cross-sectional view of the portion of line I-I' in the diagram;

[0031] Figure 3 It shows the corresponding Figure 2 A cross-sectional view of section AA in the middle;

[0032] Figure 4 This is a cross-sectional view showing the alternative scattering particles of the embodiment;

[0033] Figure 5 This is a cross-sectional view showing a portion of the display device according to an embodiment;

[0034] Figure 6 This is a schematic diagram illustrating the alternative dispersant of the implementation scheme.

[0035] Figure 7 This is a flowchart illustrating a method for manufacturing a display device according to an embodiment;

[0036] Figure 8 This is a flowchart illustrating a method for manufacturing a display device according to an embodiment;

[0037] Figure 9 This is a cross-sectional view illustrating the operation of a method for manufacturing a display device according to an embodiment;

[0038] Figure 10 This is a cross-sectional view illustrating the operation of a method for manufacturing a display device according to an embodiment;

[0039] Figure 11 This is a cross-sectional view illustrating the operation of a method for manufacturing a display device according to an embodiment; and

[0040] Figure 12 This is a graph showing the emission efficiency based on the number of scattering particles. Detailed Implementation

[0041] This disclosure may have various modifications and may be implemented in different forms, and exemplary embodiments will be explained in detail with reference to the accompanying drawings. However, this disclosure may be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, all modifications, equivalents, and substitutions included within the spirit and scope of this disclosure should be included in this disclosure.

[0042] It should be understood that when a component (or area, layer, component, etc.) is referred to as being "on," "connected to," or "attached to" another component, it can be directly on, directly connected to, or directly attached to the other component, or there can be one or more intermediate components. When a component is referred to as being "directly on," "directly connected to," or "directly attached to" another component, there are no intermediate components.

[0043] The same reference numerals refer to the same components throughout. Furthermore, in the accompanying drawings, the thickness, scale, and dimensions of the constituent components have been enlarged to effectively explain the technical content.

[0044] As used herein, the singular forms “a”, “an”, and “the” are intended to also include the plural forms unless the context clearly indicates otherwise.

[0045] As used in this article, expressions such as “at least one of…”, “one of…”, and “selected from” modify the entire column of elements when preceding a column of elements, but do not modify any individual element in that column.

[0046] The term “and / or” includes one or more combinations that may be defined by related elements.

[0047] Furthermore, the use of "may" when describing an implementation of this disclosure means "one or more implementations of this disclosure".

[0048] As used herein, the terms “substantially,” “about,” and similar terms are used as terms of approximation rather than as terms of degree, and are intended to explain the inherent biases in measurements or calculations that would be recognized by one of ordinary skill in the art.

[0049] Any numerical ranges listed herein are intended to include all subranges of the same numerical precision falling within the listed range. For example, the range “1.0 to 10.0” is intended to include all subranges between the listed minimum value of 1.0 and the listed maximum value of 10.0 (and inclusive), i.e., a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit listed herein is intended to include all lower numerical limits falling within it, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits falling within it. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly list any subranges falling within the scope expressly listed herein.

[0050] It should be understood that although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, a first element may be referred to as a second element. Similarly, a second element may be referred to as a first element. As used herein, the singular form is intended to also include the plural form unless the context clearly indicates otherwise.

[0051] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “top,” “bottom,” and “top” may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the accompanying drawings. It should be understood that spatial relative terms are intended to cover different orientations of the device during use or operation, other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features would be oriented “above” or “above” other elements or features. Therefore, the term “below” can encompass both the above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein should be interpreted accordingly.

[0052] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should be further understood that terms (e.g., those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and should not be interpreted in an idealized or overly formal sense, unless expressly defined herein.

[0053] It should be further understood that the terms “comprises” and / or “comprising”, when used in this specification, indicate the presence of the specified features, figures, steps, operations, elements, components or combinations thereof, but do not exclude the presence or addition of one or more other features, figures, steps, operations, elements, components or combinations thereof.

[0054] The following will explain, with reference to the accompanying drawings, a display device according to an embodiment of the present disclosure and a method for manufacturing the display device.

[0055] Figure 1 A display device according to an embodiment is shown. Figure 2 It shows the corresponding Figure 1 The portion of line I-I' in the diagram is a cross-sectional view of the display device according to the embodiment. Figure 3 It is shown Figure 2 A cross-sectional view of the magnified area AA in the image, and Figure 5 Another embodiment of the coating described in this disclosure is shown. Figure 4 The alternative scattering particles of the embodiment are shown. Figure 6 The alternative dispersant for the proposed implementation is shown.

[0056] exist Figure 1 In this document, a portable electronic device is exemplified as a display device DD. The display device DD can be used in large electronic devices (such as televisions, monitors, and outdoor billboards) as well as small and medium-sized electronic devices (such as personal computers, laptops, personal digital terminals, vehicle navigation units, game consoles, smartphones, tablets, and cameras). Furthermore, the aforementioned electronic device is only provided as an embodiment, and the display device can be used in other electronic devices unless the electronic device deviates from the scope of this disclosure.

[0057] refer to Figure 1 The display device DD can display an image IM through a display surface IS. The display surface IS includes a display area DA for displaying the image IM and a non-display area NDA adjacent to the display area DA. The non-display area NDA is the area where no image is displayed. In one or more embodiments, the non-display area NDA may surround or partially surround the display area DA.

[0058] The display area DA can have a quadrilateral shape. However, this disclosure is not limited to this, and the shape of the display area DA and the non-display area NDA can be designed in a relative sense. Furthermore, the shape of the display area DA and the non-display area NDA can be any suitable shape. Additionally, the non-display area NDA may not exist on the front portion (or front surface) of the display device DD. For example, in one or more embodiments, the display area DA may be the only area on the front portion (or front surface) of the display device DD.

[0059] The display device DD of the embodiment may include a light-emitting element layer (LED) and a light control layer (CTL) disposed on the LED. The light control layer (CTL) may include a plurality of separate spacer members (BP), a color control member (CL) disposed between the spacer members (BP), and a coating (AT) covering the sides of the spacer members (BP) (e.g., each of the right and left sides). For example, in one or more embodiments, the coating (AT) may be between a color control member (CL-1) and the right side of a spacer member (BP). The coatings (AT and AT-a) may contain at least one of the following (e.g., selected from at least one of): a substituted dispersant (SP) and substituted scattering particles (SC-A), wherein the substituted dispersant (SP) contains at least one substituent (e.g., selected from at least one of): an amine group and a carboxyl group, and the substituted scattering particles (SC-A) contain at least one substituent (e.g., selected from at least one of): an amine group and a carboxyl group. According to the embodiment, the number of amine groups and the number of carboxyl groups contained in the coatings (AT and AT-a) may differ from each other. The light control layer (CTL) will be explained in more detail below.

[0060] refer to Figure 2 The display device DD may include a first substrate SUB1, a circuit layer DP-CL disposed on the first substrate SUB1, a light-emitting element layer LED disposed on the circuit layer DP-CL, and an encapsulation layer TFE disposed on the light-emitting element layer LED.

[0061] The first substrate SUB1 may be a polymer substrate, a plastic substrate, a glass substrate, and / or a quartz substrate. The first substrate SUB1 may be a transparent insulating substrate. In one or more embodiments, the first substrate SUB1 may be rigid, and in other embodiments, the first substrate SUB1 may be flexible. However, this disclosure is not limited thereto. For example, portions of the first substrate SUB1 may be rigid, and other portions of the first substrate SUB1 may be flexible.

[0062] The circuit layer DP-CL can be disposed on the first substrate SUB1, and the circuit layer DP-CL can include multiple transistors. Each of the transistors can include a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL can include switching transistors and driving transistors to drive light-emitting elements (LED-1, LED-2, and LED-3).

[0063] The LED light-emitting element layer may include each of the first to third light-emitting elements (LED-1, LED-2, and LED-3). Each of the first to third light-emitting elements (LED-1, LED-2, and LED-3) may include a first electrode (EL1-1, EL1-2, and EL1-3), a hole transport region (HTR), an emitter layer (EML), an electron transport region (ETR), and a second electrode (EL2) stacked sequentially. For example, the first electrode (EL1-1, EL1-2, or EL1-3), the hole transport region (HTR), the emitter layer (EML), the electron transport region (ETR), and the second electrode (EL2) may be stacked sequentially. The emitter layer (EML) can produce blue light. The emitter layer (EML) can produce light with a wavelength range of about 410 nm to about 480 nm (or a wavelength range of about 410 nm to about 480 nm). The LED light-emitting element layer can emit blue light.

[0064] In the LED light-emitting element layer, a pixel defining layer (PDL) can be defined (e.g., defined between adjacent light-emitting elements (LED-1, LED-2, and LED-3)). The pixel defining layer PDL can be formed by comprising a polyacrylate-based resin or a polyimide-based resin. In one or more embodiments, the pixel defining layer PDL can be formed using inorganic materials. For example, the pixel defining layer PDL can be formed by comprising silicon nitride, silicon oxide, silicon oxynitride, etc. In the LED light-emitting element layer, the light-emitting elements (LED-1, LED-2, and LED-3) can be divided or defined by the pixel defining layer PDL, or separated from each other.

[0065] A TFE (Transmission Electrode Interior) encapsulation layer can be disposed on and encapsulate the LED light-emitting element layer. The TFE layer protects the LED from moisture and / or oxygen, and also protects it from foreign substances such as dust. Figure 2 In this embodiment, the encapsulation layer TFE is illustrated as comprising an organic layer OL and an inorganic layer IL, but the present disclosure is not limited thereto. For example, the encapsulation layer TFE may include at least one inorganic layer and at least one organic layer. In one or more embodiments, the encapsulation layer TFE may have a structure in which organic and inorganic layers are stacked alternately. For example, the encapsulation layer TFE may have a structure in which inorganic layers, organic layers, and inorganic layers are stacked sequentially.

[0066] The display device DD of the embodiment may include a light control layer CTL disposed on the light-emitting element layer LED. The light control layer CTL may include multiple separate spacer members BP, color control members CL, and coating AT.

[0067] The light control layer CTL of the embodiment may include a plurality of spacer members BP, a color control member CL disposed between the spacer members BP, and a coating (AT and AT-a) covering the sides of the spacer members BP. The coating (AT and AT-a) may cover the side of the spacer members BP adjacent to the color control member CL. In one or more embodiments, the coating (AT and AT-a) may be between the spacer members BP and the color control member CL. According to the embodiment, the coating (AT and AT-a) may contain at least one of the following (e.g., selected from at least one of): a substituted dispersant SP (e.g., see Figure 6 The substituted dispersant SP may contain at least one of the following substituents (e.g., selected from at least one of the following): amine group and carboxyl group. The substituted dispersant SP may contain at least one of the following substituents (e.g., selected from at least one of the following): amine group and carboxyl group. The number of amine groups and the number of carboxyl groups contained in the coatings (AT and AT-a) of the embodiments may be different from each other.

[0068] The spacer component BP prevents or reduces light leakage and distinguishes adjacent color control components CL or at the boundaries between adjacent color control components CL. The color control components CL may include first to third color control components (first color control component CL-1, second color control component CL-2, and third color control component CL-3), which will be explained in more detail below, and the spacer component BP distinguishes between the first and third color control components (CL-1, CL-2, and CL-3) or at the boundaries between them. The spacer component BP may contain organic materials. The spacer component BP may contain organic blocking materials including black pigments or dyes. The spacer component BP may contain hydrophobic organic materials.

[0069] refer to Figure 2 The spacer members BP can be separated or spaced apart from each other in a first direction or along a first direction axis DR1. The top and bottom (e.g., top and bottom surfaces) of the spacer members BP can be parallel to the direction of the first direction axis DR1. The sides (e.g., side surfaces) of the spacer members BP can be parallel to a third direction extending in a third direction axis DR3. Figure 2 In the cross-sectional view, the sides of the spacer member BP (e.g., two opposing side surfaces parallel to each other) are illustrated as rectangular, but the shape of the spacer member BP is not limited to this. For example, in a cross-sectional view showing a cross section parallel to the plane defined by the first directional axis DR1 and the third directional axis DR3, the spacer member BP may have a trapezoidal shape including parallel short and long sides.

[0070] The spacer component BP can be separated from the color control component CL, with coatings (AT and AT-a) placed in between. Coatings (AT and AT-a) can be formed adjacent to each of the spacer component BP and the color control component CL. Coatings (AT and AT-a) can contact the color control component CL (e.g., direct contact). Coatings (AT and AT-a) can contact the spacer component BP (e.g., direct contact). Coatings (AT and AT-a) can contact the sides of the spacer component BP. In this embodiment, the coatings (AT and AT-a) can cover the sides of the spacer component BP. The coatings (AT and AT-a) can be formed by a method for manufacturing a display device, as explained in more detail below.

[0071] Figure 3 and Figure 5 Showing the corresponding Figure 2 The magnified portion of region AA in the middle. Figure 3 Region AA illustrates the case where coating AT contains substituted scattering particles SC-A but not substituted dispersant SP. Conversely, Figure 5 The region AA-a shows the case where the coating AT-a does not contain the substituted scattering particles SC-A but contains the substituted dispersant SP and the second scattering particles SC-X. Figure 3 and Figure 5 The residues (RE and RE-a) shown may include monomers, etc., provided in the method for manufacturing a display device according to the embodiments described below in more detail. However, this disclosure is not limited thereto, and the coating of the embodiments may not contain residues.

[0072] The coatings (AT and AT-a) of the embodiments may contain at least one of the following (e.g., selected from at least one of the following): a substitute dispersant SP (e.g., see Figure 6 ) and substituted scattering particles SC-A (e.g., see Figure 4The substituted dispersant SP comprises at least one substituent selected from the following (e.g., at least one substituent selected from the following): amine group and carboxyl group, and the substituted scattering particles SC-A comprise at least one substituent selected from the following (e.g., at least one substituent selected from the following): amine group and carboxyl group. The number of amine groups and the number of carboxyl groups contained in the coatings (AT and AT-a) of the embodiments can differ from each other. Therefore, the coatings (AT and AT-a) of the embodiments can more strongly exhibit one type of property of amine groups and carboxyl groups.

[0073] The coatings (AT and AT-a) may contain at least one of amine groups and carboxyl groups. For example, the coatings (AT and AT-a) may contain amine groups but not carboxyl groups. The coatings (AT and AT-a) may not contain amine groups but contain carboxyl groups. Conversely, the coatings (AT and AT-a) may contain both amine groups and carboxyl groups. In the case where the coatings (AT and AT-a) contain both amine groups and carboxyl groups, the number of amine groups and the number of carboxyl groups may be different from each other. The coatings (AT and AT-a) may contain both amine groups and carboxyl groups, and based on the total number of coatings (AT and AT-a), the number of carboxyl groups may be greater than the number of amine groups. The coatings (AT and AT-a) may contain both amine groups and carboxyl groups, and based on the total number of coatings (AT and AT-a), the number of amine groups may be greater than the number of carboxyl groups.

[0074] The coating AT of the embodiment may contain substituted scattering particles SC-A containing at least one substituent of amine and carboxyl groups, but not the substituted dispersant SP. (Reference) Figure 4 The substituted scattering particles SC-A may contain at least one substituent R1 selected from amine and carboxyl groups. The substituted scattering particles SC-A may contain at least one substituent R1 in the scattering particles SC. For example, the scattering particles SC may be at least one of TiO2, Ag, and Al. However, these are illustrative, and the present disclosure is not limited thereto. Figure 4 In the scattering particle SC-A, five substituents R1 are present on the surface of the scattering particle SC, but the number of substituents present on the surface of the scattering particle SC-A is not limited to this.

[0075] Substituent R1 can be at least one of an amine group and a carboxyl group. Multiple substituents R1 contained in the substituted scattering particle SC-A can be identical. For example, multiple substituents R1 can be amine groups. As another example, multiple substituents R1 can be carboxyl groups. In the case where all substituents R1 are either amine or carboxyl groups, the substituted scattering particle SC-A can exhibit the properties of either an amine group or a carboxyl group.

[0076] For example, in one or more embodiments, all five substituents R1 may be amine groups. In other embodiments, all five substituents R1 may be carboxyl groups. When all five substituents R1 in the substituted scattering particle SC-A are amine groups, the substituted scattering particle SC-A may exhibit the properties of amine groups. When all five substituents R1 in the substituted scattering particle SC-A are carboxyl groups, the substituted scattering particle SC-A may exhibit the properties of carboxyl groups.

[0077] Furthermore, when three of the five substituents R1 contained in the substituted scattering particle SC-A are amine groups and two are carboxyl groups, the substituted scattering particle SC-A can exhibit both amine and carboxyl group properties, but the amine group properties may be stronger than the carboxyl group properties. However, these are merely examples, and in embodiments containing multiple substituents, the number of amine groups and carboxyl groups is not limited to these.

[0078] The substituted scattering particles SC-A can exhibit the properties of the relatively dominant substituents among the amine and carboxyl groups in the substituent R1 contained in the substituted scattering particles SC-A. Furthermore, in the substituent R1 contained in the substituted scattering particles SC-A, the cases where the number of amine groups and carboxyl groups are equal are excluded. More specifically, the cases where the substituted scattering particles SC-A equivalently exhibit the properties of the amine groups and carboxyl groups are excluded.

[0079] The coating AT-a of the embodiment may not contain substituted scattering particles SC-A, but may contain a substituted dispersant SP. The coating AT of the embodiment may contain a substituted dispersant SP containing at least one substituent of an amine group and a carboxyl group (e.g., see...). Figure 6 It may not contain substituted scattering particles SC-A (e.g., see [link]). Figure 4The coating AT may contain a second scattering particle SC-X, but may also contain a second scattering particle SC-X. In cases where the coating AT contains a substituted dispersant SP but not substituted scattering particles SC-A, the second scattering particle SC-X may be included. The second scattering particle SC-X is a scattering particle located on the surface of the second scattering particle SC-X where substituents such as amine and carboxyl groups are unsubstituted. For example, in one or more embodiments, the second scattering particle SC-X may simply be scattering particle SC without substituent R1. The second scattering particle SC-X may be at least one of TiO2, Ag, and Al. For example, the second scattering particle SC-X may be TiO2.

[0080] refer to Figure 6 The dispersant SP can be a polymer resin PN in which at least one substituent R10, selected from amine and carboxyl groups, is substituted. The polymer resin PN can be at least one selected from polyurethane resin, polyethylene resin, polyacrylate resin, polyepoxy resin, and polyester resin. The substituent R10 bonded to the polymer resin PN can be at least one selected from amine and carboxyl groups. Figure 6 An example is a polymer resin PN bonded to three substituents R10, but the number of substituents R10 bonded to the polymer resin PN is not limited to this.

[0081] For example, all three substituents R10 can be amine groups. When all three substituents in the polymer resin PN are amine groups, the dispersant SP can exhibit the properties of an amine group. Conversely, all three substituents R10 can be carboxyl groups. When all three substituents in the polymer resin PN are carboxyl groups, the dispersant SP can exhibit the properties of a carboxyl group. In one or more embodiments, where two of the three substituents R10 contained in the polymer resin PN are amine groups and one is a carboxyl group, the dispersant SP can exhibit both the properties of an amine group and a carboxyl group, but can exhibit the properties of a carboxyl group more strongly. When one of the three substituents R10 contained in the polymer resin PN is an amine group and two are carboxyl groups, the dispersant SP can exhibit both the properties of an amine group and a carboxyl group, but can exhibit the properties of a carboxyl group more strongly. The polymer resin PN can exhibit the properties of the relatively dominant substituent among the amine and carboxyl groups in the substituents R10 contained in the polymer resin PN. Furthermore, cases where the number of amine groups and carboxyl groups are the same are excluded from the substituent R10 contained in the polymer resin PN. More specifically, cases where the properties of amine groups and carboxyl groups are equivalently exhibited are excluded.

[0082] For example, the substituted dispersant SP may include any one or more of the following compounds 1 to 3 (e.g., compound 1, compound 2 and / or compound 3):

[0083] Compound 1

[0084]

[0085] Compound 2

[0086]

[0087] Compound 3

[0088]

[0089] Each of compounds 1 through 3 may contain a urethane monomer. The substituted dispersant SP, including compound 1, may contain a polyurethane as a polymer resin and R... a As a substituent, the substituted dispersant SP, including compound 2, may contain polyurethane as a polymer resin and R. b As a substituent, the substituted dispersant SP, including compound 3, may contain polyurethane as a polymer resin and R. c As a substituent.

[0090] In compounds 1 through 3, R a R b and R c Each group can be independently at least one of an amine group and a carboxyl group. In compound 1, multiple R groups... a Each of the groups can be identical. In compound 1 according to one or more embodiments, multiple R groups a The group can be the same as an amine group. In other embodiments, in compound 1, multiple R groups... a The group can be the same as the carboxyl group. In compounds 1 to 3, n is an integer from 1 to 100.

[0091] The coatings (AT and AT-a) of the embodiments may contain at least one substituent selected from amine and carboxyl groups as a type of substitution for the dispersant SP or the scattering particles SC-A. The scattering particles SC-A may contain a substituent R1 at the surface of the scattering particles SC or the second scattering particles SC-X (see, for example, see...). Figure 4 The substituted dispersant SP can be a polymer resin PN substituted with at least one of the amine and carboxyl groups R10 (e.g., see...). Figure 6 ).

[0092] Furthermore, in the coatings (AT and AT-a) of the embodiments, the number of amine groups and the number of carboxyl groups can be different. Therefore, the coatings (AT and AT-a) can more strongly exhibit the properties of either the amine groups or the carboxyl groups. Coatings (AT and AT-a) that exhibit the properties of amine groups and carboxyl groups differently can prevent or reduce the adsorption of the first scattering particles SC-C contained in the color control component CL onto the spacer wall component, which will be explained in more detail below.

[0093] Refer again Figure 2 The color control component CL may include a first color control component CL-1, a second color control component CL-2, and a third color control component CL-3. In one or more embodiments, each of the first color control component CL-1, the second color control component CL-2, and the third color control component CL-3 may include a first scattering particle SC-C. The first scattering particle SC-C may have a ligand comprising at least one of an amine group and a carboxyl group substituted on its surface, and the number of amine groups and the number of carboxyl groups may be different. According to an embodiment, the first scattering particle SC-C may be the same as the substituted scattering particle SC-A. In other embodiments, the first scattering particle SC-C and the substituted scattering particle SC-A may be different. The first scattering particle SC-C may include a second scattering particle SC-X or a scattering particle SC in which at least one of an amine group and a carboxyl group substituted on its surface. However, this is merely illustrative, and the first scattering particle SC-C may be a scattering particle different from the second scattering particle SC-X (e.g., having different scattering particles SC), in which at least one of an amine group and a carboxyl group substituted on its surface.

[0094] In one or more embodiments, the first scattering particle SC-C may be substituted with only ligands comprising amine groups or only ligands comprising carboxyl groups. In other embodiments, the first scattering particle SC-C may be substituted with both ligands comprising amine groups and ligands comprising carboxyl groups. Where the surface of the first scattering particle SC-C is substituted with both ligands comprising amine groups and ligands comprising carboxyl groups, the number of ligands comprising amine groups and the number of ligands comprising carboxyl groups may differ. That is, the number of ligands comprising amine groups may be greater than the number of ligands comprising carboxyl groups, or vice versa. If the number of ligands comprising amine groups is greater than the number of ligands comprising carboxyl groups, the first scattering particle SC-C may exhibit amine group properties that are stronger than carboxyl group properties. The first scattering particle SC-C may exhibit either type of property, either amine group properties or carboxyl group properties, more strongly.

[0095] If the first scattering particles exhibit both amine and carboxyl group properties equally, it may be unsuitable to form a color control component containing the first scattering particles by inkjet printing. If the color control component is formed by inkjet printing, the jetting properties of the material containing the first scattering particles with equally amine and carboxyl group properties may deteriorate. Furthermore, in a light control layer without a coating, if the first scattering particles more strongly exhibit either amine or carboxyl group properties, the first scattering particles of the color control component may adhere to the spacer wall component. If the first scattering particles adhere to the spacer wall component, the number of first scattering particles located in the middle of the color control component may be reduced, which may deteriorate or reduce light scattering and may show (e.g., be observed) or result in a deterioration in the emission efficiency of the display device. Each of the coatings (AT and AT-a) and the first scattering particles SC-C in the embodiments can more strongly exhibit either amine or carboxyl group properties, and can prevent or reduce the adhesion of the first scattering particles SC-C to the spacer wall component BP. Furthermore, the color control component CL of the embodiments can be formed (e.g., easily formed) by inkjet printing.

[0096] Simultaneously, at least one of the first to third color control components (CL-1, CL-2, and CL-3) may contain quantum dots (QD-G and QD-R). The quantum dots (QD-G and QD-R) can convert the wavelength of light emitted from the LED light-emitting element layer. The first color control component CL-1 may contain red quantum dots QD-R and convert blue light into red light. The second color control component CL-2 can transmit blue light. The second color control component CL-2 can be formed using a transparent resin, but may further contain blue pigments or dyes. The third color control component CL-3 may contain green quantum dots QD-G and convert blue light into green light.

[0097] Quantum dots (QD-G and QD-R) are materials with a crystal structure of several nanometers in size, composed of hundreds to thousands of atoms, and exhibit quantum confinement effects due to the increased band gap caused by their small size. When light with a wavelength having an energy higher than the band gap is incident on a quantum dot (QD-G and QD-R), the quantum dot absorbs the light to enter an excited state (e.g., excited from the ground state) and emits light with a specific wavelength (e.g., based on the band gap) when it falls back to the ground state. The emitted light has a wavelength corresponding to the value of the band gap. By controlling the size and composition of the quantum dots (QD-G and QD-R), the emission properties through quantum confinement can be controlled. Quantum dots (QD-G and QD-R) can be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, group I-III-VI compounds, and combinations thereof. In cases where the quantum dots (QD-G and QD-R) are binary, ternary, or quaternary compounds, they can exist within the same particle at a uniform or substantially uniform concentration, or in a state with partially different concentration distributions. Furthermore, the quantum dots (QD-G and QD-R) can have a core / shell structure, where one quantum dot surrounds another. The core-shell interface can have a concentration gradient, where the concentration of the element present in the shell decreases towards the center (e.g., towards the core).

[0098] refer to Figure 2 On the encapsulation layer TFE, the buffer layer BFL, the first cover layer CAP1, the light control layer CTL, and the second cover layer CAP2 can be stacked in sequence (e.g., stacked sequentially). Furthermore, on the second cover layer CAP2, the color filter layer CF, the second substrate SUB2, and the protective film PF can be stacked in sequence (e.g., stacked sequentially).

[0099] A buffer layer (BFL) can be placed between the encapsulation layer (TFE) and the optical control layer (CTL). The buffer layer (BFL) can prevent or substantially prevent direct contact between the encapsulation layer (TFE) and the optical control layer (CTL).

[0100] A first cover layer CAP1 and a second cover layer CAP2 can be further disposed on the upper and lower sides of the optical control layer CTL. Each of the first cover layer CAP1 and the second cover layer CAP2 can contact the optical control layer CTL. The first cover layer CAP1 and the second cover layer CAP2 can respectively cover the bottom and top sides of the optical control layer CTL.

[0101] The color filter layer CF may include a first color filter component to a third color filter component (first color filter component CF-1, second color filter component CF-2, and third color filter component CF-3). The first to third color filter components (CF-1, CF-2, and CF-3) may be arranged separately in the extension direction of the first direction axis DR1. A light blocking component BM may be disposed between the color filter components (CF-1, CF-2, and CF-3).

[0102] The first to third color filter components (CF-1, CF-2, and CF-3) can be configured to correspond to the first to third color control components (CL-1, CL-2, and CL-3) included in the light control layer (CTL). The first color filter component CF-1 can be configured to correspond to the first color control component CL-1 and can transmit first light. The second color filter component CF-2 can be configured to correspond to the second color control component CL-2 and transmit second light different from the first light. The third color filter component CF-3 can be configured to correspond to the third color control component CL-3 and transmit third light different from the first and second light. The first color filter component CF-1 can transmit light in the wavelength range of approximately 625 nm to approximately 675 nm. The second color filter component CF-2 can transmit light in the wavelength range of approximately 410 nm to approximately 480 nm. The third color filter component CF-3 can transmit light in the wavelength range of approximately 500 nm to approximately 570 nm. For example, the first light can be red light, the second light can be blue light, and the third light can be green light. The first color filter element CF-1 can block blue and green light while transmitting red light. The second color filter element CF-2 can block green and red light while transmitting blue light. The third color filter element CF-3 can block blue and red light while transmitting green light. Although specific wavelength regions are described for the transmission of the first to third color filter elements (CF-1, CF-2, and CF-3), this disclosure is not limited thereto. For example, the first to third color filter elements (CF-1, CF-2, and CF-3) can be modified to transmit any suitable wavelength region.

[0103] The light-blocking component BM can be formed by comprising an organic light-blocking material including a black pigment or dye, or an inorganic light-blocking material. In one or more embodiments, the light-blocking component BM can be formed by comprising an organic light-blocking material including a blue pigment or dye, or an inorganic light-blocking material.

[0104] The second substrate SUB2 may be a polymer substrate, a plastic substrate, a glass substrate, and / or a quartz substrate. The second substrate SUB2 may be a transparent insulating substrate. The second substrate SUB2 may be rigid, and in other embodiments, the second substrate SUB2 may be flexible. However, this disclosure is not limited thereto. For example, portions of the second substrate SUB2 may be rigid, and other portions of the second substrate SUB2 may be flexible.

[0105] A protective film PF can be provided on the second substrate SUB2. The protective film PF can protect the display surface IS of the display device DD and reduce reflection caused by the refractive index difference between the second substrate SUB2 and air. In the display device of the embodiment, the protective film PF can be omitted, and other components for protecting the display surface IS can be provided.

[0106] refer to Figure 3 In the cross-sectional view, the interface IF of the coating AT adjacent to the first color control component CL-1 is not shown as a straight line, but rather as a curve. However, this is merely an illustration, and the shape of the interface IF is not limited to this (e.g., not limited to a curve). The shape of the interface IF can be changed depending on the behavior of the substituted dispersant SP or the second scattering particles SC-X contained in the coating AT.

[0107] The coatings (AT and AT-a) of the embodiments may contain at least one substituent among amine and carboxyl groups in a state of substitution to the substituted dispersant SP or the substituted scattering particles SC-A. In the case where coating AT-a contains the substituted dispersant SP, it may contain second scattering particles SC-X. The substituted scattering particles SC-A or the second scattering particles SC-X contained in the coatings (AT and AT-a) can cover the sides of the spacer wall component BP. The substituted scattering particles SC-A and the second scattering particles SC-X can prevent or reduce the adsorption of the first scattering particles SC-C contained in the color control component CL on the sides of the spacer wall component BP.

[0108] In a light control layer without a coating, the amount of first scattering particles adsorbed on the spacer wall members can be increased compared to a light control layer with a coating. Because the first scattering particles are adsorbed on the spacer wall members, the amount of first scattering particles distributed in the middle of the color control members can be reduced, and therefore, the light scattering phenomenon at the color control members can be reduced or deteriorated, potentially leading to a decrease in the emission efficiency of the display device.

[0109] According to embodiments, the number of amine groups and the number of carboxyl groups contained in the coatings (AT and AT-a) can be different, and the coatings (AT and AT-a) can more strongly exhibit any type of property of the amine groups and carboxyl groups. The display device DD of the embodiments may include coatings (AT and AT-a) covering the sides of the spacer member BP, and the substituted scattering particles SC-A or second scattering particles SC-X contained in the coatings (AT and AT-a) may cover the sides of the spacer member. Therefore, the adsorption of first scattering particles SC-C contained in the color control member CL onto the spacer member BP can be prevented or reduced. The degradation of the emission efficiency of the display device caused by the adsorption of first scattering particles SC-C onto the spacer member BP can be prevented or reduced. Furthermore, the display device of the embodiments may contain substituted scattering particles SC-A or second scattering particles SC-X in the coatings (AT and AT-a), which can expand the light scattering area and provide improved emission efficiency of the display device.

[0110] Figure 7 and Figure 8 This is a flowchart schematically illustrating a method for manufacturing a display device according to an embodiment. Figures 9 to 11 This diagram schematically illustrates the operation of a method for manufacturing a display device according to an embodiment. In the following explanation of the method for manufacturing a display device according to the embodiment, the reference will not be repeated. Figures 2 to 6 The content being explained is the same, and the differences can also be explained. (Referring to...) Figures 2 to 6 The interpreted elements will be assigned the same reference symbols, and therefore, descriptions of repeated reference symbols need not be repeated.

[0111] The method for manufacturing a display device according to the embodiment may include the action of forming a color filter layer CF (S100) and the action of forming a light control layer CTL (S200). The step of forming the light control layer CTL (S200) may include the action of forming a plurality of spacer members BP (S210), the action of providing an initial coating P-AT between the spacer members BP (S220), the action of applying vacuum and heat AH to the initial coating P-AT to form a coating AT (S230), and the action of forming a color control member CL comprising quantum dots QD and first scattering particles SC-C between the spacer members BP on which the coating AT is formed (S240).

[0112] refer to Figure 9 The color filter layer CF can be formed on the second substrate SUB2 (e.g., formed under the second substrate SUB2, see below). Figure 2 On the color filter layer CF, a light control layer CTL can be formed (e.g., see...). Figure 2However, this disclosure is not limited thereto, and the color filter layer CF may not be formed on the second substrate SUB2, but rather on a separate component.

[0113] exist Figure 9 The diagram illustrates the action of forming a coating (S230). A vacuum and heat AH can be applied to the initial coating P-AT to form the coating AT. The vacuum and heat applied to the initial coating P-AT can be applied simultaneously (e.g., at the same time). In other embodiments, the vacuum and heat applied to the initial coating P-AT can be applied one at a time (i.e., sequentially). A vacuum can be applied to the initial coating P-AT first, and heat can be applied after a certain period of time.

[0114] According to the implementation scheme, the initial coating P-AT may contain substituted scattering particles SC-A (e.g., see...). Figure 4 ) and alternative dispersants SP (e.g., see Figure 6 At least one of the following: Substituted scattering particles SC-A and substituted dispersant SP. Each of these may contain at least one substituent from amine and carboxyl groups. Figure 9 In this process, the initial coating P-AT comprises substituted scattering particles SC-A and is provided on the color filter layer CF. For example, the initial coating P-AT can be provided on the color filter layer CF, and a second overlay layer CAP2 is provided between the color filter layer CF and the initial coating P-AT, as shown below. Figure 9 As shown in the figure. However, this disclosure is not limited thereto. For example, the initial coating P-AT may contain a substituted dispersant SP and be provided on the color filter layer CF. In the case where the initial coating P-AT contains a substituted dispersant SP, the initial coating P-AT may contain second scattering particles SC-X. Based on the total weight of the initial coating P-AT, the initial coating P-AT may contain more than about 0 wt% to less than about 5 wt% of the second scattering particles SC-X.

[0115] The initial coating P-AT may further contain monomers. Based on the total weight of the initial coating P-AT, it may contain more than about 0 wt% to less than about 5 wt% of monomers. The monomers may be provided together with a thermosetting agent or a photocuring agent. After the substituted scattering particles SC-A are adsorbed onto the spacer wall component to form the coating AT, the monomers may prevent or reduce the separation of the substituted scattering particles SC-A from the coating AT. If heat AH is applied to the initial coating P-AT, the substituted scattering particles SC-A may separate from the spacer wall component. Monomers may be applied to prevent or reduce the separation of the substituted scattering particles SC-A from the spacer wall component. For example, the monomers may be urethane monomers, ethylene monomers, acrylic monomers, epoxy monomers, or ester monomers.

[0116] The initial coating P-AT may further contain a solvent VT. The solvent VT can be removed by applying vacuum and heat AH. The solvent VT may include at least one of the following (e.g., selected from at least one of): propylene glycol methyl ether acetate (PGMEA), dimethylacetamide (DMA), γ-butyrolactone (GBL), cyclohexyl acetate (CHA), and dipropylene glycol monomethyl ether acetate (DPMA). The boiling point of the solvent VT can be from about 50°C to about 250°C. For example, the boiling point of the solvent VT can be from about 100°C to about 200°C. The vapor pressure of the solvent VT can be greater than about 0.1 mmHg to less than about 1 mmHg. However, these are merely illustrative, and the present disclosure is not limited thereto.

[0117] After removing the solvent VT from the initial coating P-AT, the substituted scattering particles SC-A can be adsorbed onto the side of the spacer wall component BP, and residues such as monomers RE can be retained. The residues RE can be materials other than the substituted scattering particles SC-A. Simultaneously, all residues RE can be removed from the coating AT of the embodiment, and the coating AT is formed solely with the substituted scattering particles SC-A.

[0118] The substituted scattering particles SC-A adsorbed on the side of the spacer wall component BP can prevent or reduce the adsorption of the first scattering particles SC-C contained in the color control component CL onto the spacer wall component BP. If the initial coating contains a substituted dispersant SP and second scattering particles SC-X (e.g., see...), Figure 5 The second scattering particle SC-X can be adsorbed onto the side of the spacer member. The second scattering particle SC-X can prevent or reduce the adsorption of the first scattering particle SC-C, contained in the color control member CL, onto the spacer member BP. Furthermore, replacing the scattering particle SC-A and the second scattering particle SC-X can help scatter the light provided from the light-emitting element layer LED. Therefore, the emission efficiency of the display device can be improved.

[0119] After the initial coating P-AT is formed into coating AT, the color control component CL can be formed. Figure 11 The color control component CL shown can be the aforementioned first color control component CL-1 (for example, see...). Figure 2 ) or the third color control component CL-3 (for example, see Figure 2 The quantum dot QD shown in the color control component CL can be either the aforementioned red quantum dot QD-R or green quantum dot QD-G. Furthermore, the color control component CL can be the aforementioned second color control component CL-2 (see, for example, [link to relevant documentation]). Figure 2 ), and in it Figure 11 In the case where the color control component CL is the second color control component CL-2, it may not contain quantum dot (QD).

[0120] The method for manufacturing a display device according to the embodiment includes the action of forming a light control layer CTL (S200), and the formation of the light control layer CTL may include the action of forming a coating AT (S230). The coating AT can be formed by providing an initial coating P-AT comprising either a replacement scattering particle SC-A or a replacement dispersant SP and a second scattering particle SC-X. The replacement scattering particles SC-A and the second scattering particles SC-X can cover the sides of the spacer member BP, and can provide a display device DD with improved emission efficiency.

[0121] Figure 12 The diagram illustrates the emission efficiency based on the number of scattering particles. In the light control layers "L1", "L2", and "L3", the number of first scattering particles, which are not adsorbed onto the spacer components but distributed among the color control components, is different. "L2" indicates that the number of first scattering particles distributed among the color control components is twice the number distributed among the color control components in "L1". "L3" indicates that the number of first scattering particles distributed among the color control components is three times the number distributed among the color control components in "L1". "EQE" represents the emission efficiency. "Thickness" represents the thickness of the color control components and can be parallel to the thickness direction of the display device. In other words, the thickness of the color control components can be measured in the thickness direction of the display device.

[0122] refer to Figure 12 If the thickness is the same, the emission efficiency increases with the increase of the number of first scattering particles distributed in the middle portion. In the display device DD of the embodiment, if a coating AT is formed on the spacer member BP, the number of first scattering particles SC-C distributed in the middle portion can be increased, and the adsorption of first scattering particles SC-C contained in the color control member CL on the spacer member BP can be prevented or reduced. Therefore, the degradation of the emission efficiency of the display device DD can be prevented or reduced. Furthermore, due to the increase in scattering phenomena of the substituted scattering particles SC-A or the second scattering particles SC-X contained in the coating AT covering the side of the spacer member BP, the emission efficiency of the display device DD can be improved.

[0123] The display device of the embodiment includes a coating covering the sides of the spacer member, which can prevent or reduce the adsorption of first scattering particles on the sides of the spacer member. Furthermore, the coating may contain substitute scattering particles or second scattering particles to increase light scattering, and thus can provide improved emission efficiency of the display device.

[0124] The method for manufacturing a display device according to the embodiment includes the action of forming a coating, which can prevent or reduce the adsorption of first scattering particles on the side of the spacer member. Furthermore, the alternative scattering particles or second scattering particles provided for forming the coating can increase light scattering. Therefore, the display device manufactured by the method of the embodiment can exhibit improved emission efficiency properties.

[0125] The display device of the embodiment contains at least one of a substituted dispersant and a substituted scattering particle in a coating adjacent to the spacer wall component, thereby exhibiting improved emission efficiency properties.

[0126] Furthermore, the method for manufacturing a display device according to the embodiment includes the action of forming a coating comprising at least one of a substitute dispersant and a substitute scattering particle, and can be used to manufacture a display device with improved emission efficiency.

[0127] Although exemplary embodiments of this disclosure have been described, it is to be understood that this disclosure should not be limited to these exemplary embodiments, and various changes and modifications can be made by those skilled in the art within the spirit and scope of this disclosure as set forth in the claims and their equivalents.

Claims

1. A display device, comprising: Light-emitting element layer; as well as The light control layer on the light-emitting element layer, The light control layer includes: Multiple separate partition wall components; A color control component between the spacer wall components, the color control component comprising quantum dots and first scattering particles; and A coating covering the side of the spacer wall component adjacent to the color control component. The coating comprises at least one selected from substituted dispersants and substituted scattering particles, wherein the substituted dispersant comprises at least one substituent selected from amine groups and carboxyl groups, and the substituted scattering particles comprise at least one substituent selected from amine groups and carboxyl groups. The coating contains amine groups and carboxyl groups that are different in number from each other.

2. The display device of claim 1, wherein the coating comprises the substituted dispersant and does not comprise the substituted scattering particles, and The coating contains a second scattering particle on the substituent that is different from the substituted scattering particle.

3. The display device of claim 1, wherein the substituted dispersant comprises a polymer resin substituted with at least one selected from amine groups and carboxyl groups.

4. The display device of claim 3, wherein the polymer resin is at least one selected from polyurethane resin, polyethylene resin, polyacrylic resin, polyepoxy resin and polyester resin.

5. The display device of claim 1, wherein the coating does not contain the substituted dispersant but contains the substituted scattering particles.

6. The display device of claim 1, wherein the surface of the first scattering particle is replaced by a ligand comprising at least one selected from amine and carboxyl groups, and The number of amine groups and carboxyl groups on the surface of the first scattering particle are different from each other.

7. A method for manufacturing a display device, the method comprising: Forming a color filter layer; as well as Forming a light control layer, The formation of the light control layer includes: Multiple spacer wall components are formed; An initial coating is provided between the spacer wall components, the initial coating comprising at least one selected from substituted dispersants and substituted scattering particles, the substituted dispersant comprising at least one substituent selected from amine groups and carboxyl groups, and the substituted scattering particles comprising at least one substituent selected from amine groups and carboxyl groups; A coating covering the sides of the spacer wall component is formed by applying a vacuum and heat to the initial coating; and A color control component comprising quantum dots and first scattering particles is formed between the spacer wall components on which the coating is formed, and This includes the amine groups and carboxyl groups in the initial coating being different in number from each other.

8. The method for manufacturing the display device as claimed in claim 7, wherein the initial coating further comprises a solvent, and the solvent is removed during the formation of the coating.

9. The method for manufacturing the display device as claimed in claim 8, wherein the solvent comprises at least one selected from PGMEA, DMA, GBL, CHA, and DPMA.

10. The method for manufacturing the display device as claimed in claim 8, wherein the boiling point of the solvent is 50°C to 250°C.

11. The method of manufacturing the display device as claimed in claim 7, wherein the initial coating comprises the substituted dispersant and does not comprise the substituted scattering particles, and wherein the initial coating comprises second scattering particles on the substituents that are different from the substituted scattering particles.

12. The method for manufacturing the display device as claimed in claim 11, wherein the second scattering particles are greater than 0 wt% and less than 5 wt% based on the total weight of the initial coating.

13. The method for manufacturing the display device as claimed in claim 7, wherein the initial coating does not contain the substituted dispersant but contains the substituted scattering particles.

14. The method for manufacturing the display device as claimed in claim 7, wherein the initial coating further comprises a monomer, and The monomer is used together with a thermosetting agent or a photocuring agent.

15. The method for manufacturing the display device as claimed in claim 14, wherein the monomer is greater than 0 wt% and less than 5 wt% based on the total weight of the initial coating.

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