Display device and method for manufacturing a display device

Abstract

A display device according to an embodiment of the present invention includes a display panel and a light control component disposed on the display panel, wherein the light control component includes a plurality of baffles spaced apart from each other and a plurality of light control units disposed between the plurality of baffles, and at least one of the plurality of light control units includes: a first layer comprising a first base resin and a coupling agent dispersed in the first base resin, and a second layer disposed on the first layer and comprising a second base resin and a light emitter dispersed in the second base resin, and thus, the display device may have improved display quality and reliability.

Description

Technical Field

[0001] This invention relates herein to display devices and methods for manufacturing display devices, and more particularly, to display devices having increased luminous efficiency and reliability and methods for manufacturing display devices. Background Technology

[0002] Display panels include transmissive display panels that selectively transmit source light generated from a light source and emissive display panels that generate source light from the display panel itself. Display panels may include different types of color control layers depending on the pixels to generate color images. Color control layers may transmit only source light with a predetermined wavelength range or may convert the color of the source light. Some color control layers may also change the properties of light without converting the color of the source light. Summary of the Invention

[0003] Technical issues

[0004] The objective of this invention is to provide a display device with improved display quality and reliability.

[0005] Another objective of this invention is to provide a method for manufacturing a display device with improved display quality, which involves reduced processes and costs.

[0006] Technical solution

[0007] A display device according to an embodiment of the present invention includes a display panel and a light control component disposed on the display panel, wherein the light control component includes a plurality of barrier ribs spaced apart from each other and a plurality of light control units disposed between the plurality of barrier ribs, and at least one of the plurality of light control units includes a first layer comprising a first base resin and a coupling agent dispersed in the first base resin, and a second layer disposed on the first layer and comprising a second base resin and a light emitter dispersed in the second base resin.

[0008] The second layer may also include scattering particles dispersed in the second base resin.

[0009] The first layer may also include scattering particles dispersed in the first base resin.

[0010] The first layer may have a first inorganic material concentration, and the second layer may have a second inorganic material concentration that is different from the first inorganic material concentration.

[0011] The difference between the concentration of the first inorganic material and the concentration of the second inorganic material can be greater than 1 wt% and less than 20 wt%.

[0012] The second layer may not contain the coupling agent.

[0013] The difference between the acid value and amine value of the first base resin and the second base resin can be less than 5 mg KOH / g.

[0014] The difference between the acid value and amine value of the first base resin and the second base resin can be 35 mg KOH / g or greater.

[0015] The display panel may include a light-emitting device that generates a first light, and the plurality of light control units may include a first light control unit that transmits the first light, a second light control unit that converts the first light into a second light, and a third light control unit that converts the first light into a third light.

[0016] The first optical control unit may include a first control layer containing the coupling agent and a second control layer disposed on the first control layer. The second optical control unit may include a third control layer containing the coupling agent and a fourth control layer disposed on the third control layer and including a first emitting element that converts the first light into the second light. The third optical control unit may include a fifth control layer containing the coupling agent and a sixth control layer disposed on the fifth control layer and including a second emitting element that converts the first light into the third light.

[0017] Each of the first control layer, the third control layer, and the fifth control layer may further include the first light emitter.

[0018] The third control layer may further include the first light emitter, and the fifth control layer may further include the second light emitter.

[0019] A display device according to an embodiment of the present invention includes a display panel that generates first light and a light control component disposed on the display panel, wherein the light control component includes a first light control unit that transmits the first light, a second light control unit that converts the first light into second light, and a third light control unit that converts the first light into third light, and at least one of the first light control unit, the second light control unit, and the third light control unit includes a first layer comprising a first base resin, a coupling agent dispersed in the first base resin, and scattering particles dispersed in the first base resin, and a second layer disposed on the first layer and comprising a second base resin and a light emitter dispersed in the second base resin.

[0020] A method for manufacturing a display device according to an embodiment of the present invention includes: preparing a display panel; and forming a light control component on the display panel, wherein forming the light control component includes: providing a first ink comprising a coupling agent to form a first ink layer; providing a second ink comprising a light emitter on the first ink layer to form a second ink layer; and curing the first ink layer and the second ink layer.

[0021] The first ink may contain a first resin, scattering particles dispersed in the first resin, and the coupling agent dispersed in the first resin. The second ink may contain a second resin, scattering particles dispersed in the second resin, and the light emitter dispersed in the second resin. The first ink may have a first inorganic material concentration, and the second ink may have a second inorganic material concentration different from the first inorganic material concentration.

[0022] The difference between the concentration of the first inorganic material and the concentration of the second inorganic material can be greater than 1 wt% and less than 10 wt%.

[0023] The difference between the acid value and amine value of the first resin and the second resin may be less than 5 mg KOH / g or may be 35 mg KOH / g or greater.

[0024] Forming the light control component may further include: forming a plurality of barrier ribs prior to forming the first ink layer, and providing the first ink and the second ink in at least one of a plurality of regions defined between the plurality of barrier ribs.

[0025] Forming the first ink layer may include providing a first pattern ink comprising scattering particles, a second pattern ink comprising a first luminescent element, and a third pattern ink comprising a second luminescent element different from the first luminescent element between each of the plurality of barrier ribs.

[0026] Forming the first ink layer may include providing a common first ink between the various ribs of the plurality of ribs; and forming the second ink layer may include providing a first sub-ink comprising a first light-emitting element and a second sub-ink comprising a second light-emitting element different from the first light-emitting element on the first ink layer.

[0027] Beneficial effects

[0028] According to an embodiment of the present invention, the coupling agent contained in the lower layer of the light control unit allows for increased coupling force between the light control unit and the base layer to improve reliability, and prevents a decrease in the luminous efficiency of the light emitter contained in the upper layer of the light control unit, and thus the display device can exhibit excellent display quality.

[0029] According to embodiments of the present invention, a method for manufacturing a display device is provided in which the storage characteristics of the ink forming the optical control unit are prevented from deteriorating to reduce costs, and the optical control unit having multiple layers can be formed by a single curing process, thereby reducing process costs and time. Attached Figure Description

[0030] Figure 1 This is an exploded perspective view of a display device according to an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of a display module according to an embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view of a light control component according to an embodiment of the present invention;

[0033] Figures 4a to 4c This is a cross-sectional view showing a portion of a light control component according to an embodiment of the present invention;

[0034] Figures 5a to 5c This is a cross-sectional view showing a portion of a light control component according to an embodiment of the present invention;

[0035] Figures 6a to 6c This is a cross-sectional view illustrating some processes in a method for manufacturing a display device according to an embodiment of the present invention;

[0036] Figures 7a to 7c This is a cross-sectional view of some processes in a method for manufacturing a display device according to an embodiment of the present invention, enlarged;

[0037] Figure 8a and Figure 8b This is a cross-sectional view illustrating some processes in a method for manufacturing a display device according to an embodiment of the present invention;

[0038] Figure 9 This is a cross-sectional view of some processes in a method for manufacturing a display device according to an embodiment of the present invention, enlarged;

[0039] Figure 10a These are images captured using a separation layer formed by ink according to an embodiment of the present invention;

[0040] Figure 10b These are images taken from a comparative example of a separation layer formed by ink.

[0041] Figure 11 It is an enlarged plan view showing a portion of the display module included in a display device according to an embodiment of the present invention;

[0042] Figure 12a and Figure 12bIt is an enlarged cross-sectional view showing a portion of a display module included in a display device according to an embodiment of the present invention; and

[0043] Figure 13 This is a graph showing the external quantum efficiency based on thickness of the light control unit pattern according to an embodiment of the present invention and the light control unit pattern according to a comparative example. Detailed Implementation

[0044] In the following description, embodiments of the present invention will be described with reference to the accompanying drawings.

[0045] In this description, when an element (or area, layer, section, etc.) is referred to as being “on”, “connected to”, or “linked to” another element, it means that the element may be directly on, directly connected to, or linked to the other element, or that a third element may be arranged between them.

[0046] Similar reference numerals always indicate similar elements. Additionally, in the drawings, the thickness, scale, and dimensions of elements are exaggerated for the purpose of effectively describing the technical content. The term "and / or" includes all combinations of one or more of the associated configurations.

[0047] It will be understood that although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the teachings of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0048] Additionally, terms such as "below," "lower part," "above," and "upper part" are used to describe the relationships of the configurations shown in the accompanying drawings. These terms are used as relative concepts and are described with reference to the directions indicated in the drawings.

[0049] It should be understood that the terms “comprising” or “having” are intended to specify the presence of the features, integers, steps, operations, elements, components or combinations thereof stated in this disclosure, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0050] As used herein, “directly arranged on” can mean that there are no additional layers, films, zones, plates, etc., between one part and another. For example, “directly arranged on” can mean that two layers or two components are arranged between them without the use of additional components such as adhesive components.

[0051] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms defined in commonly used dictionaries shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and without limitation, except as interpreted in an ideal or overly formal sense.

[0052] In the following description, a light control component and a display device including the light control component according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0053] Figure 1 This is an exploded perspective view of a display device according to an embodiment of the present invention. Figure 2 This is a cross-sectional view of a display module according to an embodiment of the present invention. Figure 2 Is with Figure 1 The cross-sectional view corresponding to line I-I'.

[0054] In embodiments, the display device ES can be a large display device, such as a television, monitor, or billboard. Alternatively, the display device ES can be a display device used in small to medium-sized products such as personal computers, laptops, personal digital terminals, car navigation units, game consoles, smartphones, tablet computers, and cameras. Furthermore, these are merely examples, and therefore other display devices can be employed without departing from the invention.

[0055] The display device ES of the embodiment may include a window WM, a display module DM, and a housing HAU. The display module DM may include a display panel DP as a display element. Meanwhile, although not shown in the figures, the display device ES may include various types of elements activated by electrical signals, such as display elements, touch elements, or detection elements.

[0056] at the same time, Figure 1 The accompanying figures below illustrate the first direction DR1 to the third direction DR3, and the directions indicated by the first direction DR1, the second direction DR2 and the third direction DR3 described herein are relative concepts and can therefore be changed to other directions.

[0057] In this description, for ease of description, the third direction DR3 is defined as the direction in which the image is provided to the user. Additionally, the first direction DR1 and the second direction DR2 may be perpendicular to each other, and the third direction DR3 may be the normal direction of the plane defined by the first direction DR1 and the second direction DR2. Figure 1 In this context, the plane defined by the first direction DR1 and the second direction DR2 can provide a display surface for the image.

[0058] In the display device ES according to an embodiment, a window WM may be arranged on a display module DM. The window WM may be made of a material including glass, sapphire, or plastic. The window WM includes a transmissive region TA that transmits an image provided from the display module DM and a light-blocking region BA adjacent to the transmissive region TA that does not transmit an image. Meanwhile, with... Figure 1 The difference shown is that, in the display device ES of the embodiment, the window WM can be omitted.

[0059] In the display device ES of the embodiment, the display module DM may be arranged below the window WM. The display module DM may include a display panel DP and a light control component CCM arranged on the display panel DP.

[0060] The display panel DP can be a light-emitting display panel. For example, the display panel DP can be a light-emitting diode (LED) display panel, an organic electroluminescent display panel, or a quantum dot light-emitting display panel. However, the embodiments of the present invention are not limited thereto.

[0061] A light-emitting diode (LED) display panel may include light-emitting diodes, the emitting layer of an organic electroluminescent display panel may include organic electroluminescent materials, and the emitting layer of a quantum dot light-emitting display panel may include quantum dots or quantum rods. Hereinafter, the display panel DP included in the display device ES according to an embodiment of the present invention will be described as an organic electroluminescent display panel. However, embodiments of the present invention are not limited thereto.

[0062] The display device ES of the embodiment may include a display panel DP and a light control component CCM disposed on the upper side of the display panel DP, and the display device ES of the embodiment may be an organic electroluminescent display device including an organic electroluminescent display panel. The display panel DP can provide a first light. For example, the display panel DP can emit blue light.

[0063] The light control component CCM can convert the wavelength of light supplied from the display panel DP or transmit light supplied from the display panel DP. The light control component CCM can convert the wavelength of blue light supplied from the display panel DP or transmit blue light.

[0064] On a plane, a surface on which an image is displayed on a display panel DP is defined as a display surface. The display surface includes a display area DA in which an image is displayed and a non-display area NDA in which no image is displayed. The display area DA is defined on the plane at the center of the display panel DP and may overlap with the transmissive area TA of the window WM.

[0065] The housing HAU can be disposed below the display panel DP and house the display panel DP. The housing HAU can be arranged to cover the display panel DP such that the upper surface of the display surface of the display panel DP is exposed. The housing HAU can cover the side and bottom surfaces of the display panel DP and expose the entire upper surface.

[0066] Reference Figure 2 The display panel DP may include a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a display element layer DP-OEL. In an embodiment, the base substrate BS, the circuit layer DP-CL, and the display element layer DP-OEL may be stacked sequentially on a third-direction DR3.

[0067] The base substrate BS can be a component that provides a base surface on which the display element layer DP-OEL is disposed. The base substrate BS can be a glass substrate, a metal substrate, a plastic substrate, etc. However, embodiments of the present invention are not limited thereto, and the base substrate BS can be an inorganic layer, an organic layer, or a composite material layer.

[0068] In this embodiment, the circuit layer DP-CL may be disposed on the base substrate BS, and the circuit layer DP-CL may include a plurality of transistors (not shown). Each transistor (not shown) may include a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL may include an organic electroluminescent element (OEL) for driving the display element layer DP-OEL. Figure 12a and Figure 12b ( ) switching transistors and driving transistors.

[0069] A light control component (CCM) is disposed on the display panel (DP). The CCM may include a light control layer (CCL), a color filter layer (CFL), and a base layer (BL). For example, the display panel (DP) may include an organic light-emitting diode (OEL) that emits first light. Figure 12a and Figure 12b The light control component CCM may include a conversion mechanism from an organic electroluminescent element (OEL). Figure 12a and Figure 12b The wavelength of the first light provided or the light control unit (CCP) that transmits the first light. Figure 3 ).

[0070] Figure 3 This is a cross-sectional view showing a light control component according to an embodiment of the present invention. Figure 3 The components of the light control component CCM are shown stacked sequentially in the direction opposite to the third direction DR3.

[0071] Reference Figure 3The optical control component CCM includes a base layer BL and an optical control layer CCL disposed below the base layer BL. The optical control layer CCL may include a plurality of barrier ribs BK arranged spaced apart from each other and a plurality of optical control units CCPs disposed between the barrier ribs BK. That is, according to the embodiment, the optical control component CCM may include a base layer BL, a plurality of barrier ribs BK disposed on the base layer BL, and optical control units CCPs disposed between the plurality of barrier ribs BK spaced apart from each other. Although Figure 3 As an example, a base layer BL is shown to provide a reference surface on which a light control layer CCL is disposed, but embodiments of the invention are not limited thereto, and the light control layer CCL may be disposed on top of a display element layer DP-OEL ( Figure 12b TFE thin film encapsulation layer Figure 12b On the reference surface provided.

[0072] The optical control component (CCM) of the embodiment may include multiple optical control units CCP-R, CCP-B, and CCP-G. The optical control unit CCP may include a first optical control unit CCP-B that transmits a first light, a second optical control unit CCP-G that converts the first light into a second light, and a third optical control unit CCP-R that converts the first light into a third light. The second light may be light with a wavelength range longer than that of the first light, and the third light may be light with a wavelength range longer than that of both the first and second light. For example, the first light may be blue light, the second light may be green light, and the third light may be red light. The first light may have a wavelength range of 410 nm to 480 nm, the second light may have a wavelength range of 500 nm to 570 nm, and the third light may have a wavelength range of 625 nm to 675 nm. Simultaneously, the first light may be light emitted from the display panel DP (Display Panel Display). Figure 2 It provides source light to the optical control unit (CCP).

[0073] The first optical control unit CCP-B may be a transmission unit that transmits the wavelength of the first light without converting it. The second optical control unit CCP-G and the third optical control unit CCP-R may include light emitters. The light emitters may be particles that convert the wavelength of the incident light to emit light of different wavelengths. In an embodiment, the light emitters included in the second optical control unit CCP-G and the third optical control unit CCP-R may be quantum dots.

[0074] Quantum dots are particles that can convert the wavelength of light provided. Quantum dots can be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, and combinations thereof.

[0075] Group II-VI compounds may be selected from the group consisting of: binary compounds selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; and compounds selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, C Ternary compounds selected from the group consisting of dHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof, and quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0076] III-V group compounds may be selected from the group consisting of: binary compounds selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof; and quaternary compounds selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0077] Group IV-VI compounds may be selected from the group consisting of: binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. Group IV elements may be selected from the group consisting of Si, Ge and mixtures thereof. Group IV compounds may be binary compounds selected from the group consisting of SiC, SiGe and mixtures thereof.

[0078] In this case, binary, ternary, or quaternary compounds can exist in particles with a uniform concentration distribution, or they can exist in the same particles with partially different concentration distributions.

[0079] Quantum dots can have a core-shell structure, where the core-shell structure includes a core and a shell surrounding the core. Additionally, a core-shell structure can exist where one quantum dot surrounds another quantum dot. The interface between the core and shell can have a concentration gradient where the concentration of elements present in the shell decreases towards the center.

[0080] In embodiments, quantum dots may have a core-shell structure comprising a nanocrystalline core and a shell surrounding the core, as described above. The shell of the quantum dot may serve as a protective layer to prevent chemical deformation of the core, thereby maintaining semiconductor properties, and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be single-layered or multi-layered. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases towards the center. Examples of shells for quantum dots may be metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0081] For example, the metal or non-metal oxide used in the shell may be a binary compound such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 and NiO, or a ternary compound such as MgAl2O4, CoFe2O4, NiFe2O4 and CoMn2O4, but the embodiments of the present invention are not limited thereto.

[0082] In addition, the semiconductor compound may be, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the embodiments of the present invention are not limited thereto.

[0083] Quantum dots can have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and within this range, color purity or color reproducibility can be enhanced. Furthermore, light emitted through such quantum dots is emitted in all directions, and thus a wide viewing angle can be improved.

[0084] Furthermore, there are no particular restrictions on the form of quantum dots, as long as they are in a form commonly used in the field. More specifically, quantum dots can be in the form of spherical nanoparticles, pyramidal nanoparticles, multi-armed nanoparticles, cubic nanoparticles, nanotubes, nanowires, nanofibers, nanosheets, etc.

[0085] Quantum dots can emit light in colors that can be controlled by their particle size, and therefore can emit light in various colors such as blue, red, and green. The smaller the particle size of the quantum dots, the shorter the wavelength range of light they can emit. For example, the particle size of quantum dots that emit green light can be smaller than the particle size of quantum dots that emit red light.

[0086] At least one of the optical control units CCP-R, CCP-B, and CCP-G may have multiple layers. In an embodiment, the first optical control unit CCP-B may include a first control layer CCP-B1 and a second control layer CCP-B2, the second optical control unit CCP-G may include a third control layer CCP-G1 and a fourth control layer CCP-G2, and the third optical control unit CCP-R may include a fifth control layer CCP-R1 and a sixth control layer CCP-R2. (See below for further details.) Figures 4a to 4c The two-layer structure included in each of the optical control units CCP-R, CCP-B, and CCP-G is described.

[0087] The barrier rib BK can define an opening OH on one surface of the color filter layer CFL, which is arranged to overlap with the light control layer CCL. The light control units CCP-R, CCP-B, and CCP-G can fill the opening OH.

[0088] According to the embodiment, the light control component CCM may further include a color filter layer CFL. The color filter layer CFL may be disposed between the base layer BL and the light control layer CCL. The color filter layer CFL may include a light-shielding unit BM and a color filter CF.

[0089] The light-shielding unit BM can be arranged on the base layer BL. Multiple light-shielding units BM can be arranged spaced apart from each other, while exposing a portion of the base layer BL. Color filters CF-B, CF-G, and CF-R can be arranged between the light-shielding units BM.

[0090] A color filter CF may include multiple color filters CF-B, CF-G, and CF-R. That is, a color filter layer CFL may include a first color filter CF-B that transmits a first light, a second color filter CF-G that transmits a second light, and a third color filter CF-R that transmits a third light. For example, the first color filter CF-B may be a blue color filter, the second color filter CF-G may be a green color filter, and the third color filter CF-R may be a red color filter.

[0091] Each of the color filters CF-B, CF-G, and CF-R may include a polymeric photosensitive resin and a pigment or dye. The first color filter CF-B may include a blue pigment or blue dye, the second color filter CF-G may include a green pigment or green dye, and the third color filter CF-R may include a red pigment or red dye.

[0092] However, the embodiments of the present invention are not limited thereto, and the first color filter CF-B may not include pigments or dyes. The first color filter CF-B may include a polymeric photosensitive resin, but does not include pigments or dyes. The first color filter CF-B may be transparent. The first color filter CF-B may be formed of a transparent photosensitive resin.

[0093] The light-shielding unit BM can be a black matrix. The light-shielding unit BM can be formed comprising organic or inorganic light-shielding materials, both of which include black pigments or dyes. The light-shielding unit BM prevents light leakage and separates the boundaries between adjacent color filters CF-B, CF-G, and CF-R.

[0094] Multiple shading units BM can be arranged to be spaced apart from each other, and each of the shading units BM can overlap with each of the multiple barrier ribs BK.

[0095] The color filter layer CFL may also include a low-refractive-index layer LRL. The low-refractive-index layer LRL may be disposed between the color filter CF and the optical control layer CCL. The low-refractive-index layer LRL may have a refractive index of about 1.1 to about 1.5. The refractive index value of the low-refractive-index layer LRL may be controlled by the proportion of hollow inorganic particles and / or voids contained in the low-refractive-index layer LRL.

[0096] The color filter layer CFL may also include a buffer layer BFL. Although Figure 3 The illustration shows a buffer layer (BFL) disposed between a color filter (CF) and a low-refractive-index layer (LRL), but the implementation is not limited to this. For example, the buffer layer (BFL) may be disposed on the low-refractive-index layer (LRL) adjacent to the light control layer (CCL). The buffer layer (BFL) may be a protective layer protecting the low-refractive-index layer (LRL) or the color filter (CF). The buffer layer (BFL) may be an inorganic material layer comprising at least one inorganic material selected from silicon nitride, silicon oxide, and silicon oxynitride. The buffer layer (BFL) may be formed as a single layer or multiple layers.

[0097] The base layer BL can be a component that provides a base surface on which color filter layers (CFLs), light control layers (CCLs), etc., are disposed. The base layer BL can be a glass substrate, a metal substrate, a plastic substrate, etc. However, embodiments of the present invention are not limited to these, and the base layer BL can be an inorganic layer, an organic layer, or a composite material layer.

[0098] The light control layer CCL may also include a cover layer CPL. The cover layer CPL may be disposed on the light control unit CCP and the barrier rib BK. The cover layer CPL serves to prevent the penetration of moisture and / or oxygen (hereinafter referred to as "moisture / oxygen"). The cover layer CPL may be disposed on the light control unit CCP to prevent the light control unit CCP from being exposed to moisture / oxygen. The cover layer CPL may include at least one inorganic layer. That is, the cover layer CPL may be formed to include inorganic materials. For example, the cover layer CPL may be formed to include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, or a metal film thereof that ensures light transmittance. Simultaneously, the cover layer CPL may also include an organic film. The cover layer CPL may be formed from a single layer or multiple layers.

[0099] Figures 4a to 4c This is a cross-sectional view showing a portion of a light control component according to an embodiment of the present invention. Figures 5a to 5c This is a cross-sectional view showing a portion of a light control component according to another embodiment of the present invention. Figure 4a and Figure 5a Enlarged Figure 3 The view of region A. Figure 4b and Figure 5b Enlarged Figure 3 The view of region B. Figure 4c and Figure 5c Enlarged Figure 3 The view of region C.

[0100] Reference Figure 3 and Figures 4a to 4c In the optical control component (CCM) according to an embodiment, at least one of the plurality of optical control units (CCPs) may include a first layer of CCP-B1, CCP-G1, and CCP-R1, and a second layer of CCP-B2, CCP-G2, and CCP-R2. The first layers of CCP-B1, CCP-G1, and CCP-R1 may be arranged adjacent to the color filter layer (CFL), and the second layers of CCP-B2, CCP-G2, and CCP-R2 may be layers arranged below the first layers of CCP-B1, CCP-G1, and CCP-R1 and spaced apart from the color filter layer (CFL). The thickness of the second layers of CCP-B2, CCP-G2, and CCP-R2 may be greater than the thickness of the first layers of CCP-B1, CCP-G1, and CCP-R1.

[0101] The first layers CCP-B1, CCP-G1, and CCP-R1 comprise a first base resin BR1 and a coupling agent CA dispersed in the first base resin BR1. The coupling agent CA may be a material that improves the bonding strength between the optical control unit CCP and adjacent components in contact with the optical control unit CCP. In one embodiment, the coupling agent CA may be a material that improves the bonding strength between the optical control unit CCP and the low-refractive layer LRL. Alternatively, when the color filter layer CFL is omitted, the coupling agent CA may be a material that improves the bonding strength between the optical control unit CCP and the base layer BL.

[0102] The coupling agent CA can be a silane coupling agent. For example, the coupling agent CA may include (3-epoxypropoxypropyl)trimethoxysilane, (3-epoxypropoxypropyl)triethoxysilane, (3-epoxypropoxypropyl)methyldimethoxysilane, (3-epoxypropoxypropyl)methyldiethoxysilane, (3-epoxypropoxypropyl)dimethylethoxysilane, 3,4-epoxybutyltrimethoxysilane, 3,4-epoxybutyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyl At least one of the following groups: triethoxysilane, aminopropyltrimethoxysilane, aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3-dimethyl-butylene)propylamine, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltriethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, and (3-isocyanate propyl)triethoxysilane.

[0103] In the first layers CCP-B1, CCP-G1, and CCP-R1, the coupling agent CA may have a concentration of 2 wt% or less. The coupling agent CA may be contained in a weight ratio of 2:98 or less relative to the total weight of the first layers CCP-B1, CCP-G1, and CCP-R1. A portion of the coupling agent CA contained in the first layers CCP-B1, CCP-G1, and CCP-R1 may be chemically bonded to components in contact with the first layers CCP-B1, CCP-G1, and CCP-R1.

[0104] In addition to the coupling agent CA, the first layers CCP-B1, CCP-G1, and CCP-R1 may also include inorganic materials. The inorganic materials contained in the first layers CCP-B1, CCP-G1, and CCP-R1 may be, for example, scattering particles SC. The scattering particles SC may be TiO2 or silica-based nanoparticles. The scattering particles SC may be particles that scatter light to increase light output efficiency. The scattering particles SC may be uniformly dispersed in the first base resin BR1.

[0105] At least a portion of the first layers CCP-B1, CCP-G1, and CCP-R1 may include a light emitter. In an embodiment, the light emitter may not be included in the first control layer CCP-B1 of the first layers CCP-B1, CCP-G1, and CCP-R1; the first light emitter QD1 may be included in the third control layer CCP-G1, and the second light emitter QD2 may be included in the fifth control layer CCP-R1. Each of the first light emitter QD1 and the second light emitter QD2 may be a quantum dot. In an embodiment, the first light emitter QD1 may be a green quantum dot emitting green light, and the second light emitter QD2 may be a red quantum dot emitting red light. Figure 4b and Figure 4c As shown, the luminescent body may not be included in the third control layer CCP-G1 and the fifth control layer CCP-R1.

[0106] The second layers CCP-B2, CCP-G2, and CCP-R2 may comprise a second base resin BR2 and inorganic materials dispersed within the second base resin BR2. The coupling agent CA may not be included in the second layers CCP-B2, CCP-G2, and CCP-R2. The second layers CCP-B2, CCP-G2, and CCP-R2 may be formed from the second base resin BR2 and inorganic materials dispersed within the second base resin BR2. The inorganic materials included in the second layers CCP-B2, CCP-G2, and CCP-R2 may be, for example, scattering particles SC and luminescent materials QD1 and QD2. In this embodiment, the scattering particles SC may be included in the second control layer CCP-B2 among the second layers CCP-B2, CCP-G2 and CCP-R2, the scattering particles SC and the first emitting element QD1 may be included in the fourth control layer CCP-G2, and the scattering particles SC and the second emitting element QD2 may be included in the sixth control layer CCP-R2 among the second layers CCP-B2, CCP-G2 and CCP-R2.

[0107] When the concentration of inorganic materials contained in the first layers CCP-B1, CCP-G1, and CCP-R1 is defined as a first inorganic material concentration, and the concentration of inorganic materials contained in the second layers CCP-B2, CCP-G2, and CCP-R2 is defined as a second inorganic material concentration, the first and second inorganic material concentrations may be the same or different. The first inorganic material concentration may be the concentration of scattering particles and emitting elements contained in the first layers CCP-B1, CCP-G1, and CCP-R1. The second inorganic material concentration may be the concentration of scattering particles and emitting elements contained in the second layers CCP-B2, CCP-G2, and CCP-R2. In embodiments, the first and second inorganic material concentrations are different, and the difference between the first and second inorganic material concentrations may be from 1 wt% to 20 wt%. In embodiments, the difference between the first and second inorganic material concentrations may be from 1 wt% to 10 wt%. The difference between the first and second inorganic material concentrations may be from 1 wt% to 5 wt%.

[0108] The first base resin BR1 and the second base resin BR2 are media in which the luminescent material is dispersed, and can be formed from various resin compositions commonly referred to as binders. However, embodiments of the present invention are not limited thereto, and in this description, any medium capable of dispersing the luminescent material may be referred to as a base resin, regardless of its name, additional functions, constituent materials, etc. The base resin may be a polymer resin. For example, the base resin may be an acrylic resin, a urethane resin, a silicone resin, an epoxy resin, etc. The base resin may be a transparent resin.

[0109] The first layers CCP-B1, CCP-G1, and CCP-R1, and the second layers CCP-B2, CCP-G2, and CCP-R2, can be layers derived from solvent-free inks. That is, the first layers CCP-B1, CCP-G1, and CCP-R1, and the second layers CCP-B2, CCP-G2, and CCP-R2, may not contain separate organic solvents for dissolving the monomers used to dissolve the base resin or for forming the base resin through polymerization, nor for particles such as coupling agents or luminescent particles dispersed therein, and may be derived from solvent-free inks in which particles such as coupling agents or luminescent particles are dispersed in the base resin.

[0110] Each of the first base resin BR1 and the second base resin BR2 may be an acidic or basic material. In an embodiment, both the first base resin BR1 and the second base resin BR2 may be acidic or both may be basic. Alternatively, one of the first base resin BR1 and the second base resin BR2 may be acidic, and the other may be basic. In an embodiment, the difference between the acid value and the amine value of each of the first base resin BR1 and the second base resin BR2 may be 35 mg KOH / g or greater. In this description, the acid value refers to the number of mg of KOH required to neutralize the free fatty acids contained in 1 g of oil, and the amine value refers to the number of mg of KOH titrated per 1 g of amine.

[0111] Alternatively, each of the first base resin BR1 and the second base resin BR2 may be a material with amphoteric properties. In an embodiment, the first base resin BR1 and the second base resin BR2 may be materials containing both acidic and basic functional groups in their molecular structure. In an embodiment, the difference between the acid value and the amine value of the first base resin BR1 and the second base resin BR2 may be less than 5 mg KOH / g.

[0112] In an embodiment, the first base resin BR1 and the second base resin BR2 may comprise polymer compounds represented by chemical formulas 1-1 to 1-3.

[0113] [Chemical Formula 1-1]

[0114]

[0115] [Chemical Formula 1-2]

[0116]

[0117] [Chemical Formulas 1-3]

[0118]

[0119] In chemical formulas 1-1 to 1-3, R1 and R2 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and R3 is an amino group or a carboxyl group. n1 is an integer from 1 to 100. When multiple R3s are included in the structure represented by chemical formulas 1-1 to 1-3, all of the multiple R3s may be amino groups or carboxyl groups.

[0120] In an embodiment, the first base resin BR1 and the second base resin BR2 may comprise polymer compounds represented by chemical formula 2-1 or chemical formula 2-2.

[0121] [Chemical Formula 2-1]

[0122]

[0123] [Chemical Formula 2-2]

[0124]

[0125] In Formulas 2-1 and 2-2, R1 and R2 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. n2 is an integer from 1 to 100. R3 and R4 are distinct from each other, and each is independently an amino group or a carboxyl group. In Formulas 2-1 and 2-2, when R3 is an amino group, R4 is a carboxyl group, and when R3 is a carboxyl group, R4 is an amino group.

[0126] In the light control component included in the display device according to the embodiment, each of the plurality of light control units included in the light control component includes a first layer and a second layer. The first layer contains a coupling agent, and the second layer does not contain a coupling agent. In the light control component according to the embodiment, the bonding strength between the base layer and the light control unit can be ensured by the coupling agent contained in the first layer, and the pattern characteristics of the light control unit can be improved. Furthermore, in the light control component according to the embodiment, the second layer including the light emitter does not contain a coupling agent to prevent degradation of the luminous efficiency of the light emitter and to prevent degradation of the storage characteristics of the ink forming the light control unit. Accordingly, the display device including the light control component can have improved display quality and reliability.

[0127] Reference Figure 3 and Figures 5a to 5c The first CCP-C layer can be a common layer included in the first optical control unit CCP-B, the second optical control unit CCP-G, and the third optical control unit CCP-R. That is, the first CCP-C layer can be commonly patterned and arranged in the first optical control unit CCP-B, the second optical control unit CCP-G, and the third optical control unit CCP-R. Each common first CCP-C layer included in the first optical control unit CCP-B, the second optical control unit CCP-G, and the third optical control unit CCP-R may include a first base resin BR1, scattering particles SC, a coupling agent CA, and a first light emitter QD1. However, the implementation is not limited to this, and the scattering particles SC and the first light emitter QD1 may be omitted from the first CCP-C layer.

[0128] Figures 6a to 6c This is a cross-sectional view illustrating some processes in a method for manufacturing a display device according to an embodiment of the present invention. Figures 6a to 6c The process of forming a light control component in a method for manufacturing a display device according to an embodiment of the present invention is shown sequentially. In the following, with reference to... Figures 6a to 6cWhen describing the method for manufacturing a display device according to the embodiments, the same reference numerals are given to the same components as those described above, and detailed descriptions are omitted.

[0129] A method for manufacturing a display device according to an embodiment of the present invention includes: preparing a display panel and forming a light control component on the display panel.

[0130] Reference Figure 6a and Figure 6b In the method for manufacturing a display device according to an embodiment, forming a light control component includes providing first inks INK1-1, INK1-2, and INK1-3 on a reference surface to form first ink layers INL1-1, INL1-2, and INL1-3. The first inks INK1-1, INK1-2, and INK1-3 can be applied to the reference surface through first nozzles NZ1-1, NZ1-2, and NZ1-3. Figure 6a and Figure 6b As an example, a base layer BL is shown to provide a reference surface on which first inks INK1-1, INK1-2, and INK1-3 are applied. However, the invention is not limited thereto, and the first inks INK1-1, INK1-2, and INK1-3 can be applied onto a thin-film encapsulation layer TFE (Temperature Felt) formed by the display element layer DP-OEL. Figure 12b On the reference surface provided by the base layer BL, before forming the first ink layers INL1-1, INL1-2 and INL1-3, a color filter layer CFL may also be formed on the base layer BL and a plurality of barrier ribs BK may be patterned on the color filter layer CFL.

[0131] First inks INK1-1, INK1-2, and INK1-3 can each be dripped between multiple barrier ribs BK. First inks INK1-1, INK1-2, and INK1-3 may include first pattern ink INK1-1, second pattern ink INK1-2, and third pattern ink INK1-3, and each of these inks can be dripped between multiple barrier ribs BK through separate first nozzles NZ1-1, NZ1-2, and NZ1-3. First pattern ink INK1-1 can form a first pattern ink layer INL1-1, second pattern ink INK1-2 can form a second pattern ink layer INL1-2, and third pattern ink INK1-3 can form a third pattern ink layer INL1-3. First inks INK1-1, INK1-2, and INK1-3, as well as first ink layers INL1-1, INL1-2, and INL1-3, may include a first resin and a coupling agent. The first inks INK1-1, INK1-2, and INK1-3 can be solvent-free inks. That is, the first inks INK1-1, INK1-2, and INK1-3 do not contain a separate organic solvent for dissolving the first resin and the coupling agent, and the coupling agent can be dispersed in the first resin. Because the first inks INK1-1, INK1-2, and INK1-3 are solvent-free inks, they can have high viscosity.

[0132] Reference Figure 6b and Figure 6cSecond inks INK2-1 and INK2-2 are provided on some of the first ink layers INL1-1, INL1-2, and INL1-3 to form second ink layers INL2-1 and INL2-2. Second inks INK2-1 and INK2-2 can be applied to the base layer BL through second nozzles NZ2-1 and NZ2-2. Second inks INK2-1 and INK2-2 may include first sub-ink INK2-1 and second sub-ink INK2-2, and each of the first sub-ink INK2-1 and second sub-ink INK2-2 can be dripped between multiple barrier ribs BK through separate second nozzles NZ2-1 and NZ2-2. First sub-ink INK2-1 can be dripped onto the second pattern ink layer INL1-2 to form the first sub-ink layer INL2-1, and second sub-ink INK2-2 can be dripped onto the third pattern ink layer INL1-3 to form the second sub-ink layer INL2-2. The second inks INK2-1 and INK2-2 may include a second resin and a light emitter. The second inks INK2-1 and INK2-2 may be solvent-free inks. That is, the second inks INK2-1 and INK2-2 do not contain a separate organic solvent for dissolving the second resin and the light emitter, and the light emitter may be dispersed in the second resin. Because the second inks INK2-1 and INK2-2 are solvent-free inks, they may have high viscosity.

[0133] A third ink INK3 may be provided on the remaining portions of the first ink layers INL1-1, INL1-2, and INL1-3 to form a third ink layer INL3. The third ink INK3 may be applied to the base layer BL through a third nozzle NZ3. The third ink INK3 may be dripped through the third nozzle NZ3 onto areas between multiple barrier ribs BK where the second inks INK2-1 and INK2-2 have not dripped. The third ink INK3 may be dripped onto the first patterned ink layer INL1-1 to form the third ink layer INL3. The third ink INK3 may include a second resin and scattering particles. The third ink INK3 may be a solvent-free ink. That is, the third ink INK3 may not contain a separate organic solvent for dissolving the second resin and scattering particles, and the scattering particles may be dispersed in the second resin. Because the third ink INK3 is a solvent-free ink, it may have a high viscosity.

[0134] When the concentration of inorganic material contained in the first ink layers INL1-1, INL1-2, and INL1-3 is defined as the first inorganic material concentration, and the concentration of inorganic material contained in the second ink layers INL2-1 and INL2-2 is defined as the second inorganic material concentration, the first inorganic material concentration and the second inorganic material concentration may be the same or different. The first inorganic material concentration may be the concentration of scattering particles and light emitters contained in the first ink layers INL1-1, INL1-2, and INL1-3. The second inorganic material concentration may be the concentration of scattering particles and light emitters contained in the second ink layers INL2-1 and INL2-2. In embodiments, the first inorganic material concentration and the second inorganic material concentration are different, and the difference between the first inorganic material concentration and the second inorganic material concentration may be from 1 wt% to 20 wt%. In embodiments, the difference between the first inorganic material concentration and the second inorganic material concentration may be from 1 wt% to 10 wt%. The difference between the first inorganic material concentration and the second inorganic material concentration may be from 1 wt% to 5 wt%. When the concentration of the inorganic material contained in the third ink layer INL3 is defined as the concentration of the third inorganic material, the concentration of the third inorganic material may be the same as or different from the concentration of the first inorganic material. The concentration of the third inorganic material may be the concentration of scattering particles contained in the third ink layer INL3.

[0135] Reference Figure 6c The patterned first ink layers INL1-1, INL1-2, and INL1-3, the second ink layers INL2-1 and INL2-2, and the third ink layer INL3 can be cured together. The first ink layers INL1-1, INL1-2, and INL1-3, the second ink layers INL2-1 and INL2-2, and the third ink layer INL3 can be photocured. However, the implementation is not limited to this, and the first ink layers INL1-1, INL1-2, and INL1-3, the second ink layers INL2-1 and INL2-2, and the third ink layer INL3 can be thermally cured. The first ink layers INL1-1, INL1-2, and INL1-3, the second ink layers INL2-1 and INL2-2, and the third ink layer INL3 can be cured together to form multiple optical control units CCP-B, CCP-G, and CCP-R (see...). Figure 3 ).

[0136] Figures 7a to 7c This is an enlarged cross-sectional view of some processes in a method for manufacturing a display device according to an embodiment. Figures 7a to 7c An enlarged cross-sectional view is shown after the formation of the second ink layer and before curing.

[0137] like Figures 7a to 7cAs shown, the first patterned ink layer INL1-1 may include a first resin RS1, scattering particles SC, and coupling agent CA. The third ink layer INL3 may include a second resin RS2 and scattering particles SC. The second patterned ink layer INL1-2 may include a first resin RS1, scattering particles SC, a first light emitter QD1, and coupling agent CA. The first sub-ink layer INL2-1 may include a second resin RS2, a first light emitter QD1, and scattering particles SC. The third patterned ink layer INL1-3 may include a first resin RS1, scattering particles SC, a second light emitter QD2, and coupling agent CA. The second sub-ink layer INL2-2 may include a second resin RS2, a second light emitter QD2, and scattering particles SC. Figures 3 to 5c The description in [the original text] also applies to the scattering particles SC, the coupling agent CA, the first luminescent body QD1, and the second luminescent body QD2. Meanwhile, [the text continues with...] Figure 7b and Figure 7c The difference shown is that the first light emitter QD1 can be omitted in the second patterned ink layer INL1-2, and the second light emitter QD2 can be omitted in the third patterned ink layer INL1-3. Additionally, compared to... Figure 7b and Figure 7c As shown in the difference, in at least one of the first pattern ink layer INL1-1, the second pattern ink layer INL1-2, and the third pattern ink layer INL1-3, the scattering particles SC can be omitted. In the first pattern ink layer INL1-1, the second pattern ink layer INL1-2, and the third pattern ink layer INL1-3, the light emitters QD1 and QD2, as well as the scattering particles SC, can all be omitted.

[0138] The first resin RS1 can be located in the first base resin BR1 ( Figure 5a The second resin RS2 can be in the state before it is cured. Figure 5a The state before it is cured.

[0139] Each of the first resin RS1 and the second resin RS2 may be an acidic or basic material. In an embodiment, both the first resin RS1 and the second resin RS2 may be acidic or both may be basic. Alternatively, one of the first resin RS1 and the second resin RS2 may be an acidic material, and the other may be a basic material. In an embodiment, the difference between the acid value and the amine value of each of the first resin RS1 and the second resin RS2 may be 35 mg KOH / g or greater.

[0140] Alternatively, each of the first resin RS1 and the second resin RS2 may be a material with amphoteric properties. In an embodiment, the first resin RS1 and the second resin RS2 may be materials containing both acidic and basic functional groups in their molecular structure. In an embodiment, the difference between the acid value and the amine value of each of the first resin RS1 and the second resin RS2 may be less than 5 mg KOH / g. When the difference between the acid value and the amine value of each of the first resin RS1 and the second resin RS2 is 5 mg KOH / g or greater but less than 35 mg KOH / g, the first ink layers INL1-1, INL1-2 and INL1-3, the second ink layers INL2-1 and INL2-2, and the third ink layer INL3 may be mixed without forming separate layers.

[0141] In a method for manufacturing a light control component included in a display device according to an embodiment, a first ink containing a coupling agent, a second ink, and a third ink, neither of which contains a coupling agent, are sequentially provided to form each of a plurality of light control units. In this embodiment, the first, second, and third inks are provided as solvent-free inks with high viscosity, so the second and third inks do not mix with the first ink placed beneath them to form separate layers. Furthermore, since the concentration difference of the inorganic materials and the difference in acid and amine values ​​between the resins contained in the inks are controlled to meet the aforementioned ranges, mixing of the first and second inks sequentially provided when forming the plurality of light control units is further suppressed. Thus, a light control component including a plurality of light control units containing a coupling agent in the lower layer and not containing a coupling agent in the upper layer can be formed, and the first and second inks can be cured simultaneously by a single curing process without the need for separate curing of the first and second inks, thereby simplifying the process and saving manufacturing costs.

[0142] Figure 8a and Figure 8b This is a cross-sectional view illustrating some processes in a method for manufacturing a display device according to another embodiment of the present invention. Figure 9 This is a cross-sectional view of some processes in a method for manufacturing a display device according to another embodiment of the present invention. Figure 8a and Figure 8b The process of providing a first ink to form a first ink layer and providing a second ink to form a second ink layer is shown sequentially. Figure 9 An enlarged cross-sectional view of the first ink layer according to an embodiment is shown.

[0143] like Figure 8a and Figure 8bAs shown, providing the first ink INK1' to form the first ink layer INL-C can be performed by applying the first ink INK1' between multiple barrier ribs BK through a common nozzle NZ1'. That is, the first ink INK1' can be commonly dropped between the multiple barrier ribs BK to form a common first ink layer INL-C. Subsequently, the first sub-inks INK2-1 and INK2-2 of the second inks INK2-1 and INK2-2, as well as the third ink INK3, can be dropped and provided onto the commonly formed first ink layer INL-C.

[0144] Reference Figure 9 The first ink layer INL-C, formed in common, may include a first resin RS1, a coupling agent CA, scattering particles SC, and a first light emitter QD1. Simultaneously, with... Figure 9 As shown in the diagram, the first light emitter QD1 can be omitted in the first ink layer INL-C. (The last sentence appears to be incomplete and possibly refers to a different concept.) Figure 9 As shown in the diagram, both the scattering particles SC and the first luminescent body QD1 can be omitted in the first ink layer INL-C.

[0145] Figure 10a This is an image captured by a separation layer formed by ink according to an embodiment of the present invention. Figure 10b These are images taken from a comparative example of a separation layer formed by ink. Figure 10a Sequentially showing the separation layer in which a first ink with an inorganic concentration of 45 wt% and a second ink with an inorganic concentration of 41 wt% are sequentially dripped over time. Figure 10a The images shown are (a) an image taken immediately after the first and second inks were dropped, (b) an image taken 15 minutes after the first and second inks were dropped, (c) an image taken 30 minutes after the first and second inks were dropped, and (d) an image taken 30 minutes after the first and second inks were dropped and then cured by exposure. Figure 10b The image shown is taken immediately after the sequential dripping of a first ink with an inorganic concentration of 41 wt% and a second ink with an inorganic concentration of 6 wt%.

[0146] Reference Figure 10a For example, in one embodiment, when the inorganic concentration difference between the first ink and the second ink is 4 wt% within the range of 1 wt% to 20 wt%, even after 30 minutes, almost no mixing occurs between the first ink layer and the second ink layer, and the layers are separated, and a separation layer is formed by simultaneously exposing the first layer and the second layer. However, referring to... Figure 10bWhen a first ink and a second ink having an inorganic concentration difference of 35 wt% outside the range of the inorganic concentration difference described in the embodiment are sequentially dripped, the layers are partially separated, but a portion of the first ink and the second ink mixes at the interface. Figure 10a and Figure 10b The results show that the solvent-free ink is dropped sequentially to form an unmixed first and second layer, and the mixing of the first and second layers to form a separate layer is prevented by controlling the difference in concentration of the inorganic material contained in the ink.

[0147] Figure 11 It is an enlarged plan view showing a portion of the display module included in a display device according to an embodiment of the present invention. Figure 12a and Figure 12b It is an enlarged cross-sectional view showing a portion of a display module included in a display device according to an embodiment of the present invention. Figure 11 A portion of the display area DA of a display module according to an embodiment of the present invention is shown. Figure 12a and Figure 12b It shows the relationship with Figure 11 The part corresponding to line II-II'.

[0148] In the following text, refer to Figure 11 , Figure 12a and Figure 12b The display module DM of the described implementation is included in the reference. Figure 1 In the display device ES described in the embodiment, the display module DM includes a display panel DP and a light control component CCM-a, and Figures 3 to 9 The description in [the original text] can also be applied to the light control component CCM-a.

[0149] The display module DM according to the embodiment may include a display panel DP and a light control component CCM-a disposed on the display panel DP, and the light control component CCM-a may include a light control layer CCL and a color filter layer CFL. The light control component CCM-a may include a base layer BL, a light control layer CCL disposed below the base layer BL, and a color filter layer CFL disposed between the light control layer CCL and the base layer BL. In the light control component CCM-a, the light control layer CCL may be arranged adjacent to the display panel DP.

[0150] The optical control component CCM-a may include multiple barrier ribs BK and optical control units CCP-R, CCP-B and CCP-G arranged between the barrier ribs BK.

[0151] Reference Figure 11 , Figure 12a and Figure 12bThe display module DM may include a non-emitting area NPXA and emitting areas PXA-R, PXA-G, and PXA-B. Each of the emitting areas PXA-R, PXA-B, and PXA-G may be a portion that emits light generated from an organic electroluminescent element OEL. The area of ​​each of the emitting areas PXA-R, PXA-B, and PXA-C may differ from each other in size, and in this case, the area may refer to the area when viewed on a plane.

[0152] The luminescent regions PXA-R, PXA-B, and PXA-G can be divided into multiple groups based on the color of the emitted light. Figure 11 , Figure 12a and Figure 12b In the display module DM of the illustrated embodiment, three light-emitting regions PXA-R, PXA-B, and PXA-G, emitting red, blue, and green light respectively, are presented as examples. For instance, the display device ES of the embodiment... Figure 1 It may include red emitting area PXA-R, blue emitting area PXA-B, and green emitting area PXA-G, which are different from each other.

[0153] According to Figure 12a and Figure 12b In the display module DM of the embodiment shown, the display panel DP is shown as including an organic electroluminescent element OEL comprising an organic layer OL as a common layer. That is, according to Figure 12a and Figure 12b In the display module DM of the embodiment shown, the display panel DP can emit light within the same wavelength range, regardless of the light-emitting areas PXA-R, PXA-B, and PXA-G of the display module DM. For example, the display panel DP can provide blue light as a first light to the light control component CCM-a.

[0154] According to Figure 11 , Figure 12a and Figure 12bIn the display module DM of the illustrated embodiment, the red emitting area PXA-R and the green emitting area PXA-G among the emitting areas PXA-R, PXA-B, and PXA-G may have the same area, and the blue emitting area PXA-B may have a smaller area than the red emitting area PXA-R and the green emitting area PXA-G. However, the embodiments of the present invention are not limited to this, and each of the emitting areas PXA-R, PXA-B, and PXA-G may have the same area, or may have different areas depending on the color emitted from the light control unit CCP-R, CCP-B, and CCP-G. For example, in the display module DM according to the embodiment, the blue emitting area PXA-B may have the largest area, and the green emitting area PXA-G may have the smallest area. However, the implementation is not limited to this, and the light-emitting areas PXA-R, PXA-B and PXA-G emit light of colors other than red, blue and green, or the light-emitting areas PXA-R, PXA-B and PXA-G can be set to have different area ratios.

[0155] Each of the luminescent regions PXA-R, PXA-B, and PXA-G can be a region separated by a pixel-defined film (PDL). The non-luminescent region NPXA can be the region between adjacent luminescent regions PXA-R, PXA-B, and PXA-G, and can correspond to a pixel-defined film (PDL).

[0156] like Figure 11 As shown, among the light-emitting areas PXA-R, PXA-B, and PXA-G, the red light-emitting area PXA-R and the green light-emitting area PXA-G are centrally symmetrical with respect to a reference axis extending in the second direction DR2, and the blue light-emitting area PXA-B can be arranged between the red light-emitting area PXA-R and the green light-emitting area PXA-G. When viewed in the first direction DR1, a portion of the blue light-emitting area PXA-B may not overlap with the red light-emitting area PXA-R and the green light-emitting area PXA-G. However, embodiments of the present invention are not limited to this, and the light-emitting areas PXA-R, PXA-B, and PXA-G can have various types of polygons or circles, and the arrangement structure of the light-emitting areas is not limited. For example, in an embodiment, the light-emitting regions PXA-R, PXA-B, and PXA-G may have a strip structure in which the blue light-emitting region PXA-B, the green light-emitting region PXA-G, and the red light-emitting region PXA-R are arranged alternately, and the arrangement structure of the light-emitting regions PXA-R, PXA-B, and PXA-G may be a pentile structure.

[0157] Reference Figure 12a and Figure 12bAccording to an embodiment, the display panel DP includes a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a display element layer DP-OEL disposed on the circuit layer DP-CL. The display element layer DP-OEL may include a pixel defining film PDL, an organic electroluminescent element OEL disposed between the pixel defining films PDL, and a thin film encapsulation layer TFE disposed on the organic electroluminescent element OEL.

[0158] Pixel-defined film (PDL) can be formed from a polymer resin. For example, the PDL can be formed to contain a polyacrylate-based resin or a polyimide-based resin. Alternatively, the PDL can be formed to contain inorganic materials in addition to the polymer resin. Furthermore, the PDL can be formed to contain a light-absorbing material, or it can be formed to contain a black pigment or black dye. Additionally, the PDL can be formed from inorganic materials. For example, the PDL can be formed to contain silicon nitride (SiN). x ), silicon dioxide (SiO) x ), silicon oxynitride (SiO) x N y ) etc. The pixel-defining film (PDL) can define the light-emitting areas PXA-R, PXA-B, and PXA-G. The light-emitting areas PXA-R, PXA-B, and PXA-G, as well as the non-light-emitting area NPXA, can be separated by the pixel-defining film (PDL).

[0159] Pixel-limited films (PDLs) can overlap with barrier ribs (BKs). That is, each of the multiple pixel-limited films (PDLs) can overlap with each of the multiple barrier ribs (BKs).

[0160] An organic electroluminescent device (OEL) may include a first electrode EL1 and a second electrode EL2 facing each other, and an organic layer OL disposed between the first electrode EL1 and the second electrode EL2. The organic layer OL may include a hole transport region, an emission layer, and an electron transport region. The hole transport region may include a hole injection layer adjacent to the first electrode EL1 and a hole transport layer disposed between the hole injection layer and the emission layer, and the electron transport region may include an electron injection layer adjacent to the second electrode EL2 and an electron transport layer disposed between the emission layer and the electron injection layer.

[0161] The thin-film encapsulation layer TFE can be disposed on the organic electroluminescent element OEL, and the thin-film encapsulation layer TFE can be disposed on the second electrode EL2. The thin-film encapsulation layer TFE can be disposed directly on the second electrode EL2. The thin-film encapsulation layer TFE can be a single layer or a stack of multiple layers.

[0162] A display device according to an embodiment includes a light control component disposed on a display panel. Each of a plurality of light control units included in the light control component includes a first layer and a second layer, the first layer containing a coupling agent and the second layer not containing a coupling agent, thereby improving the coating properties and patterning quality of the light control unit without degrading the luminous efficiency of the light emitter included in the light control unit. Accordingly, the display device may have improved display quality and reliability.

[0163] Reference Figure 12b According to an embodiment, the display module DM-1 may include a display panel DP and a light control component CCM-a1 disposed on the display panel DP. The light control component CCM-a1 may include a light control layer CCL-1 and a color filter layer CFL-1. In the display module DM-1 according to an embodiment, the light control layer CCL-1 may be disposed on the display panel DP. The light control layer CCL-1 may be disposed on the display panel DP through a first cover layer CPL1.

[0164] The light control layer CCL-1 of the light control component CCM-a1 may include multiple barrier ribs BK and light control units CCP-R, CCP-B, and CCP-G disposed between the barrier ribs BK. The light control units CCP-R, CCP-B, and CCP-G may be provided with first inks INK1-1, INK1-2, and INK1-3 sequentially on the first cover layer CPL1 (see...). Figure 6a And then provide the second inks INK2-1 and INK2-2 (see...) Figure 6b ) and the third ink INK3 (see Figure 6b The optical control units CCP-R, CCP-B, and CCP-G are formed on the display panel DP via a sequential process. A second cover layer CPL2 can be disposed on multiple barrier ribs BK and on the optical control units CCP-R, CCP-B, and CCP-G disposed between the barrier ribs BK to prevent the optical control units CCP-R, CCP-B, and CCP-G from being exposed to moisture / oxygen.

[0165] A color filter layer CFL-1 may be disposed on the light control layer CCL-1. The color filter layer CFL-1 may include a low-refractive-index layer LRL-1. The color filter layer CFL-1 may include a light-shielding unit BM-1 and color filters CF-R1, CF-B1, and CF-G1. However, the implementation is not limited thereto, and portions of the low-refractive-index layer LRL-1, the light-shielding unit BM-1, and the color filters CF-R1, CF-B1, and CF-G1 included in the color filter layer CFL-1 may be omitted. The color filter layer CFL-1 may be formed on the light control layer CCL-1 via a sequential process. That is, in the display module DM-1 according to the embodiment, the light control layer CCL-1 and the color filter layer CFL-1 may be sequentially formed on the display panel DP via a sequential process.

[0166] Figure 13 This is a graph showing the external quantum efficiency based on thickness of the light control unit pattern according to an embodiment of the present invention and the light control unit pattern according to a comparative example.

[0167] exist Figure 13 The example shown is a graph of the external quantum efficiency of an optical control unit formed by sequentially applying a first ink containing a coupling agent and a second ink not containing a coupling agent, and then curing the first and second inks together, based on thickness. The comparative example is a graph of the external quantum efficiency of an optical control unit formed by applying and curing a single ink containing a coupling agent, based on thickness. The reference example is a graph of the external quantum efficiency of an optical control unit formed by applying and curing a single ink without a coupling agent, based on thickness.

[0168] Reference Figure 13 It can be seen that, unlike the comparative example formed from a single ink containing a coupling agent, the light control unit pattern of the embodiment does not exhibit the degradation of the external quantum efficiency of the light emitter due to the coupling agent, and therefore exhibits an external quantum efficiency similar to that of the reference example throughout the entire thickness range. In other words, it can be seen that the light control unit pattern according to an embodiment of the present invention includes a first layer containing a coupling agent to ensure adhesion to the base layer, and further includes a second layer without a coupling agent to prevent degradation of the external quantum efficiency of the light emitter and to ensure excellent luminous efficiency of the display device when applied to a display device.

[0169] Although the invention has been described with reference to preferred embodiments, it should be understood that the invention is not limited to these preferred embodiments, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is not intended to be limited to what is set forth in the detailed description of the specification, but is intended to be defined by the appended claims.

[0170] Industry applicability

[0171] In an optical control unit applied to a display device, at least some of the optical control units contain coupling agents to improve the patterning quality of the optical control unit. However, coupling agents can degrade the luminous efficiency of the optical control unit and reduce the storage characteristics of the ink forming the optical control unit. Therefore, the present invention, which includes coupling agents contained in the lower layer of the optical control unit to increase the bonding force between the optical control unit and the base layer, thereby improving reliability without degrading the luminous efficiency of the light emitter contained in the upper layer of the optical control unit and without degrading the storage characteristics of the ink forming the optical control unit, has high industrial applicability.

Claims

1. A display device, comprising: Display panel; as well as A light control component, wherein the light control component is arranged on the display panel. The light control component includes: Multiple barrier ribs, the multiple barrier ribs being spaced apart from each other; and Multiple optical control units are arranged between the multiple barrier ribs and spaced apart from each other. At least one of the plurality of optical control units includes: A first layer, comprising a first base resin and a coupling agent and a luminescent material dispersed in the first base resin; and The second layer is disposed on the first layer and includes a second base resin and a luminescent material dispersed in the second base resin, wherein the second layer does not contain the coupling agent.

2. The display device of claim 1, wherein, The second layer also includes scattering particles dispersed in the second base resin.

3. The display device of claim 1, wherein, The first layer also includes scattering particles dispersed in the first base resin.

4. The display device of claim 1, wherein, The first layer has a first inorganic material concentration, and the second layer has a second inorganic material concentration that is different from the first inorganic material concentration.

5. The display device of claim 4, wherein, The difference between the concentration of the first inorganic material and the concentration of the second inorganic material is more than 1 wt% and less than 20 wt%.

6. The display device of claim 1, wherein, The difference between the acid value and amine value of the first base resin and the second base resin is less than 5 mg KOH / g.

7. The display device of claim 1, wherein, The difference between the acid value and amine value of the first base resin and the second base resin is 35 mg KOH / g or greater.

8. The display device of claim 1, wherein, The display panel includes a light-emitting device that generates first light, and The plurality of optical control units include a first optical control unit that transmits the first light, a second optical control unit that converts the first light into a second light, and a third optical control unit that converts the first light into a third light.

9. The display device as claimed in claim 8, wherein: The first optical control unit includes a first control layer containing the coupling agent and a second control layer disposed on the first control layer; The second optical control unit includes a third control layer containing the coupling agent and a fourth control layer disposed on the third control layer and including a first light emitter that converts the first light into the second light; and The third light control unit includes a fifth control layer containing the coupling agent and a sixth control layer disposed on the fifth control layer and including a second light emitter that converts the first light into the third light.

10. The display device of claim 9, wherein, Each of the first control layer, the third control layer, and the fifth control layer further includes the first light emitter.

11. The display device of claim 9, wherein, The third control layer further includes the first light emitter, and the fifth control layer further includes the second light emitter.

12. A display device, comprising: Display panel, the display panel generates first light; as well as A light control component, wherein the light control component is arranged on the display panel. The light control component includes: A first optical control unit that transmits the first light, a second optical control unit that converts the first light into a second light, and a third optical control unit that converts the first light into a third light. The first optical control unit, the second optical control unit, and the third optical control unit are spaced apart from each other, and at least one of the first optical control unit, the second optical control unit, and the third optical control unit includes: The first layer comprises a first base resin, a coupling agent dispersed in the first base resin, and scattering particles and a light emitter dispersed in the first base resin; and The second layer is disposed on the first layer and includes a second base resin and a luminescent material dispersed in the second base resin, wherein the second layer does not contain the coupling agent.

13. A method for manufacturing a display device, the method comprising: Fabrication of display panels; as well as A light control component is formed on the display panel. The light control component comprises: A first ink comprising a coupling agent and a luminescent material is provided to form a first ink layer; A second ink comprising a light emitter is provided on the first ink layer to form a second ink layer, wherein the second ink does not contain the coupling agent; and The first ink layer and the second ink layer are cured together to form a plurality of optical control units spaced apart from each other.

14. The method of claim 13, wherein: The first ink comprises a first resin, scattering particles dispersed in the first resin, and the coupling agent dispersed in the first resin; The second ink comprises a second resin, scattering particles dispersed in the second resin, and the light emitter dispersed in the second resin; and The first ink has a first inorganic material concentration, and the second ink has a second inorganic material concentration that is different from the first inorganic material concentration.

15. The method of claim 14, wherein, The difference between the concentration of the first inorganic material and the concentration of the second inorganic material is more than 1 wt% and less than 10 wt%.

16. The method of claim 14, wherein, The difference between the acid value and amine value of the first resin and the second resin is less than 5 mg KOH / g, or is 35 mg KOH / g or greater.

17. The method of claim 13, wherein, The light control component further includes: Multiple barrier ribs are formed before the formation of the first ink layer, and The first ink and the second ink are provided in at least one of a plurality of zones defined between the plurality of barrier ribs.

18. The method of claim 17, wherein, Forming the first ink layer includes providing a first pattern ink comprising scattering particles, a second pattern ink comprising a first luminescent body, and a third pattern ink comprising a second luminescent body different from the first luminescent body between each of the plurality of barrier ribs.

19. The method of claim 17, wherein: Forming the first ink layer includes: providing the first ink commonly between the various ribs of the plurality of ribs; and Forming the second ink layer includes: providing a first sub-ink comprising a first light-emitting element and a second sub-ink comprising a second light-emitting element different from the first light-emitting element on the first ink layer.

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