Display device and method of manufacturing the same

Abstract

An exemplary embodiment relates to a display device, the display device including: a first pixel, a second pixel, and a third pixel emitting light of different colors from each other, a first insulating layer on a first display element of the first pixel, and a second insulating layer on the first insulating layer. The first insulating layer defines a first opening portion corresponding to the first display element, the second insulating layer defines a first opening corresponding to the first opening portion, and the first opening portion has a first extending portion extending in a first direction and at least partially exposing the second insulating layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and has all the benefits of Korean Patent Application No. 10-2019-0143665, filed on November 11, 2019, the entire contents of which are incorporated herein by reference. Technical Field

[0003] One or more exemplary embodiments relate to a display apparatus and a method of manufacturing the display apparatus, and more particularly, to a display apparatus having improved color reproducibility and a simple method of manufacturing the display apparatus. Background Art

[0004] The display device visually displays data. The display device may be used as a display in a small-sized product such as a mobile phone, or a display in a large-sized product such as a television.

[0005] The display device includes a plurality of pixels that emit light by receiving an electrical signal to display an image externally. Each pixel includes a display element. For example, in an organic light emitting display device, the display element is an organic light emitting diode ("OLED").

[0006] Recently, the use of display devices has increased, and various designs for improving the quality of display devices have been attempted. In particular, as the resolution of display devices increases, research has been actively conducted to improve the color reproduction of each pixel in the display device. Summary of the invention

[0007] However, according to a display device and a method of manufacturing the display device in the related art, the time taken for each manufacturing process (ie, tact time) increases depending on the pixel arrangement.

[0008] One or more exemplary embodiments include a display device that can be manufactured by a simple manufacturing method and has improved color reproducibility, and a method of manufacturing the display device. However, the above technical features are exemplary, and the scope of the present disclosure is not limited thereto.

[0009] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented exemplary embodiments of the disclosure.

[0010] According to one or more exemplary embodiments, a display device includes: a first pixel, a second pixel, and a third pixel that emit light of different colors from each other; a first insulating layer on a first display element of the first pixel, the first insulating layer defining a first opening portion corresponding to the first display element; a second insulating layer on the first insulating layer, the second insulating layer defining a first opening corresponding to the first opening portion; a first color conversion layer disposed in the first opening, the first color conversion layer including first quantum dots for converting incident light into first color light; and a first filter layer on the first color conversion layer, wherein the first opening portion has a first extension portion extending in a first direction and at least partially exposing the second insulating layer.

[0011] The display device may further include: a second color conversion layer corresponding to a second display element of the second pixel and including second quantum dots for converting the incident light into second color light; and a second filter layer on the second color conversion layer. The first insulating layer may further define a second opening portion of the second display element corresponding to the second pixel, the second insulating layer may further define a second opening corresponding to the second opening portion, the second color conversion layer may be located in the second opening, and the second opening portion may include a second extension portion extending in a second direction opposite to the first direction and at least partially exposing the second insulating layer.

[0012] The display device may further include: a transmission layer corresponding to a third display element of the third pixel and including scattering particles for scattering the incident light; and a third filter layer on the transmission layer, wherein the first insulating layer may further define a third opening portion corresponding to the third display element of the third pixel, the second insulating layer may further define a third opening corresponding to the third opening portion, the transmission layer may be located in the third opening, and the third opening portion may include a third extension portion extending in the first direction and at least partially exposing the second insulating layer.

[0013] The first extending portion, the second extending portion, and the third extending portion may have the same width in the first direction or the second direction.

[0014] The first emission region of the first pixel, the second emission region of the second pixel, and the third emission region of the third pixel may have a square shape in a plan view.

[0015] Extension lines connecting the center of one of the first emission area, the second emission area, and the third emission area to the centers of the other two emission areas may cross each other in a plan view.

[0016] At least one of the first insulating layer and the second insulating layer may include a light shielding material.

[0017] A surface of the second insulating layer exposed by the first extension portion may have hydrophobicity.

[0018] A surface of the second insulating layer exposed by the first extending portion may be inclined.

[0019] The first insulating layer and the second insulating layer may be provided integrally with each other.

[0020] A surface of the second insulating layer exposed by the first extension portion may have hydrophobicity.

[0021] A surface of the second insulating layer exposed by the first extending portion may be inclined.

[0022] According to one or more exemplary embodiments, a method for manufacturing a display device includes: manufacturing a display unit; manufacturing a color filter unit; and combining the display unit to the color filter unit, wherein the manufacturing of the color filter unit includes: forming a light-shielding layer on an upper substrate; forming a first filter layer in a hole defined by the light-shielding layer; forming a second insulating layer defining a first opening on the light-shielding layer; forming a first insulating layer defining a first opening portion on the second insulating layer, wherein the first opening portion has a first extension portion extending in a first direction and at least partially exposing the second insulating layer; and forming a first color conversion layer in the first opening, the first color conversion layer including first quantum dots for converting incident light into first color light.

[0023] The method may further include treating a surface of the second insulating layer to have hydrophobicity, wherein the surface may be exposed by the first extending portion.

[0024] The method may further include processing a surface of the second insulating layer to be inclined, wherein the surface may be exposed by the first extending portion.

[0025] The forming of the first insulating layer and the forming of the second insulating layer may be performed simultaneously.

[0026] The forming of the first insulating layer and the forming of the second insulating layer may be performed by using a half-tone mask.

[0027] The method may further include treating a surface of the second insulating layer to have hydrophobicity, wherein the surface may be exposed by the first extending portion.

[0028] The forming of the first color conversion layer may be performed by an inkjet printing method.

[0029] At least one of the first insulating layer and the second insulating layer may include a light shielding material. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other aspects, features and advantages of certain exemplary embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0031] Figure 1 is a perspective view of a display device according to an exemplary embodiment;

[0032] Figure 2 is a cross-sectional view of a display device according to an exemplary embodiment;

[0033] Figure 3 is an enlarged view showing a portion of a display device according to an exemplary embodiment;

[0034] Figure 4 is a plan view of a display device according to an exemplary embodiment;

[0035] Figure 5 is a cross-sectional view of a color filter unit according to an exemplary embodiment;

[0036] Figure 6 is a cross-sectional view of a first pixel in a color filter unit according to an exemplary embodiment;

[0037] Figure 7 is a cross-sectional view of a first extending portion in a color filter unit according to an exemplary embodiment;

[0038] Figure 8 and Fig. 9 is a cross-sectional view of a color filter unit according to another exemplary embodiment;

[0039] Fig.10 is a cross-sectional view of a display device according to an exemplary embodiment; and

[0040] FIG. 11A to FIG. 11F are cross-sectional views illustrating processes of a method of manufacturing a display device according to an exemplary embodiment. DETAILED DESCRIPTION

[0041] Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings, with similar reference numerals in the drawings always referring to similar elements. In this regard, the present exemplary embodiments may have different forms and should not be construed as being limited to the description set forth herein. Therefore, exemplary embodiments are described below only by reference to the accompanying drawings to explain the various aspects of this description. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Throughout the disclosure, the expression "at least one of a, b, and c" means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

[0042] The exemplary embodiments will be described in more detail below with reference to the accompanying drawings. Regardless of the figure numbers, those components that are the same or correspond are given the same reference numerals, and redundant explanations are omitted.

[0043] Although terms such as "first", "second", etc. may be used to describe various components, such components are not limited to the above terms. The above terms are only used to distinguish one component from another.

[0044] Unless it has a clearly different meaning in the context, an expression used in the singular includes the expression in the plural.

[0045] In this specification, it should be understood that the terms "comprising", "having" and "including" are intended to indicate the presence of the features, numbers, steps, actions, components, parts or a combination thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, actions, components, parts or a combination thereof may exist or may be added.

[0046] It will be understood that when a layer, region or component is referred to as being “formed on” another layer, region or component, it can be directly or indirectly formed on the other layer, region or component. That is, for example, intervening layers, regions or components may be present.

[0047] For convenience of explanation, the sizes of components in the drawings may be exaggerated. In other words, since the sizes and thicknesses of components in the drawings are arbitrarily shown for convenience of explanation, the exemplary embodiments described below are not limited thereto.

[0048] When a certain exemplary embodiment can be implemented differently, a specific process order can be performed differently from the described order. For example, two processes described successively can be performed substantially simultaneously or in the reverse order of the described order.

[0049] In the specification, the phrase "A and / or B" means A, B, or A and B. In addition, the phrase "at least one of A and B" means A, B, or A and B.

[0050] In the following exemplary embodiments, when layers, regions, elements, etc. are referred to as being "connected", it will be understood that they may be directly connected or there may be intermediate portions between the layers, regions, or elements. For example, when layers, regions, elements, etc. are referred to as being "electrically connected", they may be directly electrically connected or the layers, regions, or elements may be indirectly electrically connected and there may be intermediate portions.

[0051] The x-axis, y-axis, and z-axis are not limited to the three axes of the rectangular coordinate system and can be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other.

[0052] Hereinafter, one or more exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0053] Figure 1 is a perspective view of a display apparatus 1 according to an exemplary embodiment.

[0054] Reference Figure 1 , the display device 1 includes a display area DA and a non-display area NDA. The display area DA displays an image, and the non-display area NDA does not display an image. The display device 1 may provide an image by using light emitted from the display area DA.

[0055] exist Figure 1 In the embodiment, the display device 1 includes a display area DA having a square shape, but the present invention is not limited thereto. In an exemplary embodiment, the display area DA may have a circular shape, an elliptical shape, or a polygonal shape such as a triangle, a quadrilateral, a pentagon, etc. In addition, Figure 1 The display device 1 in the embodiment includes a flat panel display device, but the display device 1 may be implemented in various types, for example, a flexible display device, a foldable display device, a rollable display device, etc.

[0056] Hereinafter, the display device 1 according to the exemplary embodiment is described as an organic light-emitting display device as an example, but the display device according to the present invention is not limited thereto. In another exemplary embodiment, the display device may include an inorganic light-emitting display, an inorganic electroluminescent ("EL") display device, or a quantum dot light-emitting display device. For example, the light-emitting layer of the display element included in the display device 1 may include: an organic material; an inorganic material; a quantum dot; an organic material and a quantum dot; an inorganic material and a quantum dot; or, an organic material, an inorganic material, and a quantum dot.

[0057] A plurality of pixels P may be disposed in the display area DA. In the specification, each pixel P may represent a sub-pixel emitting light of a color different from that of other pixels, and each pixel P may be, for example, one of a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel.

[0058] Figure 2 is a cross-sectional view of a display device 1 according to an exemplary embodiment, and Figure 3 is an enlarged view partially showing a display apparatus 1 according to an exemplary embodiment. Figure 3 An enlarged view of the first color converting layer 120R and the second color converting layer 120G and the transmissive layer 120B is shown.

[0059] Reference Figure 2 , the display device 1 includes a display unit DU and a color filter unit CU facing the display unit DU. The display unit DU may include a first pixel P1, a second pixel P2, and a third pixel P3 on a substrate 100. The first pixel P1, the second pixel P2, and the third pixel P3 may respectively emit light of different colors from each other on the substrate 100. For example, the first pixel P1 may emit red light Lr, the second pixel P2 may emit green light Lg, and the third pixel P3 may emit blue light Lb.

[0060] The first pixel P1, the second pixel P2, and the third pixel P3 may include a first display element OLED1, a second display element OLED2, and a third display element OLED3, each including an organic light emitting diode OLED. In an exemplary embodiment, the first display element OLED1, the second display element OLED2, and the third display element OLED3 may emit blue light. In another exemplary embodiment, the first display element OLED1, the second display element OLED2, and the third display element OLED3 may emit red light, green light, and blue light, respectively.

[0061] The color filter unit CU may include color filter parts 300R, 300G, and 300B. Light emitted from the first display element OLED1, the second display element OLED2, and the third display element OLED3 may be released from the display device 1 as red light Lr, green light Lg, and blue light Lb after passing through the color filter parts 300R, 300G, and 300B, respectively.

[0062] The color filter parts 300R, 300G, and 300B may be directly on the upper substrate 160. The color filter parts 300R, 300G, and 300B may include a plurality of layers, each of which will be referred to later. Figure 5 Described are the first color conversion layer 120R and the first filter layer 110R, the second color conversion layer 120G and the second filter layer 110G, and the transmission layer 120B and the third filter layer 110B.

[0063] Here, “directly on the upper substrate 160” may mean that when the color filter unit CU is manufactured, the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B are directly formed on the upper substrate 160. Thereafter, the display unit DU and the color filter unit CU may be combined with each other while the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B face the first pixel P1, the second pixel P2, and the third pixel P3, respectively. Figure 2 It is shown that the display unit DU and the color filter unit CU are bonded to each other via an adhesive layer ADH. The adhesive layer ADH may include, for example, an optically clear adhesive ("OCA"), but the present invention is not limited thereto. In another exemplary embodiment, the adhesive layer ADH may be omitted.

[0064] In reference Figure 3 In an exemplary embodiment, the first color conversion layer 120R and the second color conversion layer 120G may include a quantum dot material. The core of the quantum dot may be selected from the group consisting of: II-VI compounds, III-V compounds, IV-VI compounds, IV elements, IV compounds, and combinations thereof.

[0065] The II-VI compound can be selected from the group consisting of: CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and binary compounds selected from the group formed by mixtures thereof; AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe , CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and ternary compounds selected from the group formed by mixtures thereof; and HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and quaternary compounds selected from the group formed by mixtures thereof.

[0066] The III-V compound can 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 a group formed by mixtures thereof; ternary compounds selected from the group formed by mixtures thereof; and GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and a group formed by mixtures thereof.

[0067] The IV-VI group compound may be selected from the group consisting of: SnS, SnSe, SnTe, PbS, PbSe, PbTe and binary compounds selected from the group formed by their mixtures; SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and ternary compounds selected from the group formed by their mixtures; and SnPbSSe, SnPbSeTe, SnPbSTe and quaternary compounds selected from the group formed by their mixtures. The IV group element may be selected from the group consisting of: Si, Ge and mixtures thereof. The IV group compound may include a binary compound selected from the group consisting of: SiC, SiGe and mixtures thereof.

[0068] Here, the binary compound, ternary compound or quaternary compound may be present in the particle at a uniform concentration, or may be present in the same particle at a partially different concentration distribution. In addition, the quantum dot may have a core-shell structure in which one quantum dot surrounds another quantum dot. The interface between the core and the shell may have a concentration gradient in which the concentration of the element in the shell decreases toward the center of the core.

[0069] In some exemplary embodiments, the quantum dot may have a core-shell structure including a core having nanocrystals as described above and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer for preventing chemical modification of the core and maintaining semiconductor properties and / or a charging layer for applying electrophoretic properties to the quantum dot. The shell may have a single-layer structure or a multi-layer structure. The interface between the core and the shell may have a concentration gradient in which the concentration of the element in the shell decreases toward the center of the quantum dot. The shell of the quantum dot may include an oxide of a metal or non-metal material, a semiconductor compound, or a combination thereof.

[0070] For example, oxides of metal or non-metal materials may include, but are not limited to, binary compounds such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 , NiO, etc.; or ternary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 、CoMn 2 O 4 wait.

[0071] The semiconductor compound may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but is not limited thereto.

[0072] The quantum dot can have a full width at half maximum (FWHM) of a light emission wavelength spectrum of about 45 nanometers (nm) or less, for example about 40 nanometers or less, specifically about 30 nanometers or less, and can improve color purity or color reproduction within the above range. In addition, the light emitted from the quantum dot is omnidirectional, and thus the optical viewing angle can be increased.

[0073] The quantum dot may have any shape as long as the shape is generally used in the art, and specifically may be a spherical, conical, multi-armed or cubic nanoparticle, or may be a nanotube, nanowire, nanofiber or nanoparticle, etc.

[0074] Quantum dots can adjust the color of emitted light according to their particle size, and thus quantum dots can emit light of various colors, such as blue light, red light, green light, etc.

[0075] Reference Figure 3 The first color conversion layer 120R converts the blue incident light Lib into the first color light Lr (eg, red light Lr). The first color conversion layer 120R may include a first photosensitive polymer 123R in which first quantum dots 121R and first scattering particles 122R are dispersed.

[0076] The first quantum dots 121R are excited by the blue incident light Lib and may isotropically emit the first color light Lr having a wavelength longer than that of the blue light. The first photosensitive polymer 123R may include an organic material that transmits light. The first scattering particles 122R scatter the blue incident light Lib that is not absorbed by the first quantum dots 121R so that more first quantum dots 121R are excited, and thus the color conversion rate of the first color conversion layer 120R may be increased. The first scattering particles 122R may include, for example, titanium oxide (TiO 2 ) or metal particles.

[0077] The second color conversion layer 120G converts the blue incident light Lib into the second color light Lg (eg, green light Lg). The second color conversion layer 120G may include a second photosensitive polymer 123G in which second quantum dots 121G and second scattering particles 122G are dispersed.

[0078] The second quantum dots 121G are excited by the blue incident light Lib and can isotropically emit the second color light Lg having a wavelength longer than that of the blue light. The second photosensitive polymer 123G includes an organic material that transmits light and can include the same material as the first photosensitive polymer 123R. The second scattering particles 122G scatter the blue incident light Lib that is not absorbed by the second quantum dots 121G so that more second quantum dots 121G are excited, and thus the color conversion rate of the second color conversion layer 120G can be increased. The second scattering particles 122G may include, for example, titanium oxide (TiO 2 ) or metal particles, and may include the same material as that of the first scattering particles 122R.

[0079] The transmission layer 120B transmits the blue incident light Lib and emits the blue light Lb toward the upper substrate 160. The transmission layer 120B may include a third photosensitive polymer 123B in which third scattering particles 122B are dispersed. The third photosensitive polymer 123B may include, for example, an organic material that transmits light, such as silicone resin, epoxy resin, etc., and may include the same material as the first photosensitive polymer 123R and the second photosensitive polymer 123G. The third scattering particles 122B may scatter the blue incident light Lib, and may include the same material as the first scattering particles 122R and the second scattering particles 122G.

[0080] Figure 4 and Figure 5 1 and 2 are a plan view and a cross-sectional view respectively partially illustrating a display device and a color filter unit CU according to an exemplary embodiment.

[0081] Figure 4 and Figure 5 1 and 2 respectively show a plan view and a cross-sectional view of a color filter unit CU according to an exemplary embodiment, and Figure 5 Corresponding to the Figure 4 A cross section of the color filter unit CU taken along line BB′.

[0082] Reference Figure 4 and Figure 5 , a display device according to an exemplary embodiment includes a first pixel P1, a second pixel P2, and a third pixel P3 that emit light of different colors from each other. In an exemplary embodiment, the first pixel P1, the second pixel P2, and the third pixel P3 may each include a display element such as an organic light emitting diode OLED. Each of the first pixel P1, the second pixel P2, and the third pixel P3 may emit, for example, red light, green light, blue light, or white light through the organic light emitting diode OLED.

[0083] As mentioned above Figure 2 As described, the display device 1 includes a color filter unit CU on the display unit DU. The color filter unit CU may include an upper substrate 160, a first insulating layer 150, a second insulating layer 140, a light shielding layer 130, a first filter layer 110R, a second filter layer 110G and a third filter layer 110B, a first color conversion layer 120R and a second color conversion layer 120G, and a transmission layer 120B.

[0084] exist Figure 5 In the embodiment, for convenience of description, it is described that various layers are stacked on the upper substrate 160 in the +z direction, but the color filter unit CU according to the exemplary embodiment may be turned upside down to be attached to the display unit DU, such as Fig.10 Therefore, the layers will be described in the order of stacking on the upper substrate 160.

[0085] Furthermore, it is assumed that the display device according to the exemplary embodiment emits blue light via the organic light emitting diode OLED, and thus the transmission layer 120B may be disposed on the third filter layer 110B instead of the color conversion layer.

[0086] The upper substrate 160 may include a glass material, a ceramic material, a metal material, or a flexible or bendable material. When the upper substrate 160 is flexible or bendable, the upper substrate 160 may include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The upper substrate 160 may have a single-layer or multi-layer structure of the above-mentioned materials, and the multi-layer structure may further include an inorganic layer. In some exemplary embodiments, the upper substrate 160 may have a structure including a stacked layer in the order of organic material / inorganic material / organic material.

[0087] The light shielding layer 130 and the first, second, and third filter layers 110R, 110G, and 110B may be on one surface of the upper substrate 160 .

[0088] The light shielding layer 130 may be disposed between the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B to correspond to the non-emission area NEA (see Fig.10 ). The light shielding layer 130 may include a black matrix for improving color clarity and contrast. The light shielding layer 130 may include at least one selected from a black pigment, a black dye, and black particles. In some exemplary embodiments, the light shielding layer 130 may include a black matrix such as Cr, CrO X 、Cr / CrO X 、Cr / CrO X / CrN Y , resin (e.g., carbon pigment, RGB mixture pigment), graphite, non-Cr-based materials, etc.

[0089] The first filter layer 110R, the second filter layer 110G, and the third filter layer 110B may include red, green, and blue color filters, respectively. Light passing through the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B may have improved color reproducibility of red, green, and blue.

[0090] The second insulating layer 140 may define a first opening 141R, a second opening 141G, and a third opening 141B that expose the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B, respectively. The second insulating layer 140 may include, for example, an organic material. In an exemplary embodiment, the second insulating layer 140 may include a light shielding material to serve as a light shielding layer. The light shielding material may include, for example, at least one selected from a black pigment, a black dye, black particles, and metal particles.

[0091] The first color conversion layer 120R, the second color conversion layer 120G, and the transmissive layer 120B may be disposed in the first opening 141R, the second opening 141G, and the third opening 141B, respectively. The first color conversion layer 120R, the second color conversion layer 120G, and the transmissive layer 120B may have Figure 3 structure.

[0092] The first insulating layer 150 may define a first opening portion 151R, a second opening portion 151G, and a third opening portion 151B that expose the first color conversion layer 120R and the second color conversion layer 120G and the transmissive layer 120B, respectively. The first insulating layer 150 may include, for example, an organic material. In some cases, the first insulating layer 150 may include at least one selected from a black pigment, a black dye, black particles, and metal particles to serve as a light shielding layer.

[0093] The first pixel P1, the second pixel P2, and the third pixel P3 may include first and second color conversion layers 120R and 120G and a transmission layer 120B, respectively, and may further include first, second, and third filter layers 110R, 110G, and 110B, respectively (see FIG. Figure 4 ), although not shown in the plan view.

[0094] The first opening portion 151R has a first direction (ie, Figure 4 and Figure 6 The first extension portion 152R extends in the first direction (+y direction) and at least partially exposes the second insulating layer 140. In an exemplary embodiment, the width W of the first extension portion 152R in the first direction (+y direction) may be equal to or greater than twice the width of the first opening 141R in the first direction (+y direction), such as Figure 6 However, the present invention is not limited to the above-mentioned examples.

[0095] Although the first pixel P1 is described above, the second pixel P2 and the third pixel P3 may have the same structure as that of the first pixel P1. However, the second opening portion 151G of the second pixel P2 has a second direction (ie, Figure 4The second extending portion 152G extends in the second direction (-y direction, the direction opposite to the first direction) and at least partially exposes the second insulating layer 140. In an exemplary embodiment, the width of the second extending portion 152G in the second direction (-y direction) may be equal to or greater than twice the width of the second opening 141G in the second direction (-y direction). However, the present invention is not limited to the above example.

[0096] The first extension portion 152R, the second extension portion 152G, and the third extension portion 152B may have the same width.

[0097] The area in the first filter layer 110R through which the light emitted from the emission layer of the display unit DU passes after passing through the first color conversion layer 120R is referred to as the first emission area EA1 of the first pixel P1. The first emission area EA1 has an area equal to or smaller than that of the first filter layer 110R. In addition to the first pixel P1, the above structure can also be applied to the second pixel P2 and the third pixel P3.

[0098] Reference Figure 4, the first emission area EA1 in the first pixel P1, the second emission area EA2 in the second pixel P2, and the third emission area EA3 in the third pixel P3 may each have a square shape in a plan view. The square shape and rectangular shape of the emission area and the opening mentioned below all refer to the shape in a plan view. When the emission area has a square shape, the amount of light that does not work at the opposite edges of the pixel can be reduced compared to the case where the emission area has a rectangular shape, while the pixel area is the same as the case where the emission area has a rectangular shape. In more detail, the light emitted from the organic light emitting diode OLED propagates in all directions. As the light propagates in all directions, the light reaches the opening formed in the second insulating layer 140. In a comparative example, the opening may have a rectangular shape. That is, the opening may have a width in a first direction (ie, a y direction) and a width in a second direction (ie, an x ​​direction) perpendicular to the first direction. Depending on the width of the opening, different amounts of light may pass through the opening. The wider the opening, the greater the amount of light passing through the opening. Therefore, when the width in the first direction is greater than the width in the second direction, the amount of light emitted in the second direction may be less than the amount of light emitted in the first direction. However, when the opening formed in the second insulating layer 140 has a square shape similarly to in one embodiment of the present invention, the width in the first direction and the width in the second direction are the same. Therefore, the amount of light emitted in the second direction is the same as the amount of light emitted in the first direction. Therefore, a reduction in the amount of light in a specific direction is prevented. Therefore, it is possible to increase the amount of light passing through the opening, and the area of ​​the pixel can be the same as when the opening has a rectangular shape. When the opening has a rectangular shape, if the ratio of the vertical width (e.g., the width in the first direction) to the horizontal width (e.g., the width in the second direction) is 8:2, the area of ​​the pixel is 16. Similarly, when the opening has a square shape, the ratio of the vertical width to the horizontal width can be 4:4, and the area of ​​the pixel becomes 16, similar to the case where the opening has a rectangular shape.

[0099] When the first emission area EA1 of the first pixel P1, the second emission area EA2 of the second pixel P2, and the third emission area EA3 of the third pixel P3 have a square shape in a plan view, the first emission area EA1, the second emission area EA2, and the third emission area EA3 may be arranged so that extension lines connecting the center of one of the first emission area EA1, the second emission area EA2, and the third emission area EA3 to the centers of the other two emission areas may cross each other. Figure 4 As shown in , for example, a first extension line l connecting the center of the second emission area EA2 to the center of the third emission area EA3 and a second extension line l' connecting the center of the second emission area EA2 to the center of the first emission area EA1 may cross each other.

[0100] Figure 6 is a cross-sectional view of a first pixel P1 in a color filter unit CU according to an exemplary embodiment.

[0101] In detail, Figure 6 Shown along Figure 4 A cross section of the first pixel P1 taken along line AA′.

[0102] The light shielding layer 130, the first filter layer 110R, the first insulating layer 150, the second insulating layer 140, and the first quantum dots 121R (see FIG. 1 ) disposed in the first opening 141R and including a first quantum dot that converts incident light into first color light (eg, red light). Figure 3 ) may be on the upper substrate 160 .

[0103] The first opening portion 151R has a first extension portion 152R extending in the first direction (ie, +y direction) and at least partially exposing the second insulating layer 140. In an exemplary embodiment, the width W of the first extension portion 152R in the first direction (ie, +y direction) may be equal to or greater than twice the width of the first opening 141R in the first direction (ie, +y direction). However, the present invention is not limited to the above example.

[0104] Figure 6 The cross section of the first pixel P1 is shown, but the second pixel P2 and the third pixel P3 may have the same cross section as the cross section of the first pixel P1. Figure 4 As shown in FIG. 1 , the second opening portion 151G of the second pixel P2 has a second extension portion 152G extending in the second direction (i.e., −y direction) and at least partially exposing the second insulating layer 140. In an exemplary embodiment, the width of the second extension portion 152G in the second direction (−y direction) may be equal to or greater than twice the width of the second opening 141G in the second direction (−y direction). However, the present invention is not limited to the above example.

[0105] The first extension portion 152R, the second extension portion 152G, and the third extension portion 152B may have the same width.

[0106] In an exemplary embodiment, the surface 170 of the second insulating layer 140 may be hydrophobic, wherein the surface 170 is exposed by the first extension portion 152R. 4 , SF 6 NF 3By performing a gas plasma process with a gas of a halogen element such as fluorine or by a fluorine coating, a hydrophobic surface 170 can be obtained. Since the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R is hydrophobic, in the process of manufacturing the first color conversion layer 120R, the first color conversion layer 120R can be formed only in the first opening 141R. This process will be described later.

[0107] Figure 7 is a cross-sectional view of a color filter unit CU according to an exemplary embodiment.

[0108] Figure 7 It is shown that in the color filter unit CU according to an exemplary embodiment, a surface 170 of the second insulating layer 140 exposed by the first extension portion 152R has an inclination.

[0109] Reference Figure 7 The structure of the color filter unit CU is as described above. Figure 6 As described above, the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R may have an inclination. Figure 7 In the enlarged view of FIG. 1 , a virtual line VS shown in the second insulating layer 140 is parallel to the upper substrate 160, wherein the virtual line VS extends from the first color conversion layer 120R. A certain angle θ may be formed between the virtual line VS and the surface of the second insulating layer 140. The angle θ may be about 1° to about 2°, and the present invention is not limited thereto.

[0110] According to reference Figure 6 and Figure 7 The exemplary embodiment shown can achieve the effect of no loss in the time taken for each manufacturing process (ie, takt time). In the exemplary embodiment, an inkjet printing method using a nozzle can be used to form the first color conversion layer 120R and the second color conversion layer 120G and the transmission layer 120B. As described above with reference to Figure 4 As described, the first emission area EA1, the second emission area EA2, and the third emission area EA3 of the first pixel P1, the second pixel P2, and the third pixel P3 may have a square shape in a plan view. When the first emission area EA1, the second emission area EA2, and the third emission area EA3 have a square shape, the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B corresponding to the first emission area EA1, the second emission area EA2, and the third emission area EA3 and the first color conversion layer 120R and the second color conversion layer 120G and the transmission layer 120B may also have a square shape, even though the sizes of the shapes may be different.

[0111] In the comparative example, unlike the exemplary embodiment according to the present invention, when the first extension portion 152R is not provided, the first opening portion may have a square shape, and in this case, the number of nozzles arranged in a row may be limited, which may result in an increase in the tact time of each manufacturing process and a decrease in production yield.

[0112] Therefore, in the display device according to the exemplary embodiment, the first opening portion 151R of the first insulating layer 150 in the color filter unit CU includes the first extension portion 152R, and when the surface 170 of the second insulating layer 140 (wherein the surface 170 is exposed due to the first extension portion 152R) is hydrophobic or inclined, many nozzles arranged in a row (i.e., arranged in the y direction) can be used, and thus an effect with no loss in the takt time of each manufacturing process can be achieved.

[0113] In addition, when the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R and the second extension portion 152G has hydrophobicity or inclination, the ink ejected through the nozzle can flow into the first opening 141R and the second opening 141G to form the first color conversion layer 120R and the second color conversion layer 120G, respectively, and thus an effect with no loss in material can be achieved.

[0114] Figure 8 and Fig. 9 is a cross-sectional view of a color filter unit CU according to another exemplary embodiment.

[0115] In detail, Figure 8 and Fig. 9 The structure of the color filter unit CU is shown, in which the first insulating layer 150 and the second insulating layer 140 are integrally provided.

[0116] Reference Figure 8 and Fig. 9 , and the first insulating layer 150 and the second insulating layer 140 are separated from each other Figure 6 and Figure 7 Differently, the first insulating layer 150 and the second insulating layer 140 may be integrated. For example, the first insulating layer 150 and the second insulating layer 140 may be simultaneously manufactured through the same process using a half-tone mask.

[0117] The light shielding layer 130, the first filter layer 110R, the integrated insulating layer 180, and the first color conversion layer 120R disposed in the first opening 141R may be disposed on the upper substrate 160. Here, the integrated insulating layer 180 includes a lower layer 180b corresponding to the second insulating layer 140 and an upper layer 180a corresponding to the first insulating layer 150. The first opening portion 151R may include a first extension portion 152R extending in the first direction (+y direction) and at least partially exposing the lower layer 180b of the integrated insulating layer 180. In an exemplary embodiment, a width W of the first extension portion 152R in the first direction (+y direction) may be equal to or greater than twice a width of the first opening 141R in the first direction (+y direction).

[0118] The first extension portion 152R, the second extension portion 152G, and the third extension portion 152B may have the same width, but the present invention is not limited thereto.

[0119] In addition to the first insulating layer 150 and the second insulating layer 140 being integrated, Figure 8 Shown with Figure 6 , and thus, the surface 170 of the lower layer 180b of the integrated insulating layer 180 may have hydrophobicity, wherein the surface 170 is exposed by the first extension portion 152R. 4 , SF 6 NF 3 A hydrophobic surface can be obtained by performing a gas plasma process with a gas of a halogen element such as fluorine or by a fluorine coating.

[0120] In addition to the first insulating layer 150 and the second insulating layer 140 being integrated, Fig. 9 Shown with Figure 7 and thus, the surface 170 of the lower layer 180 b of the integrated insulating layer 180 may have an inclination, wherein the surface 170 is exposed by the first extension portion 152R.

[0121] Additionally, the integrated insulating layer 180 may include a light shielding material.

[0122] Fig.10 is a cross-sectional view of a display device according to an exemplary embodiment.

[0123] Reference Fig.10 , at least one thin film transistor T1 and a display element connected to the thin film transistor T1 may be on the display area DA of the display device according to an exemplary embodiment.

[0124] In an exemplary embodiment, a display area DA of a display device includes a plurality of pixels, for example, a first pixel P1, a second pixel P2, and a third pixel P3, and each of the first pixel P1, the second pixel P2, and the third pixel P3 includes an emission area EA. The emission area EA may be an area in which light is generated and emitted to the outside. A non-emission area NEA is between the emission areas EA, and the emission areas EA of the first pixel P1, the second pixel P2, and the third pixel P3 may be divided by the non-emission area NEA.

[0125] The first pixel P1, the second pixel P2, and the third pixel P3 may emit light of different colors from each other. For example, the first pixel P1 may emit red light, the second pixel P2 may emit green light, and the third pixel P3 may emit blue light. In a plan view, the emission area EA of each pixel may have various polygonal shapes or circular shapes, and the emission area EA may be arranged in various ways, for example, a strip arrangement, a PenTile arrangement, etc.

[0126] In addition, the display device according to the exemplary embodiment may include a first color conversion layer 120R and a second color conversion layer 120G and a transmission layer 120B corresponding to the emission areas EA of the first pixel P1, the second pixel P2, and the third pixel P3, respectively. The first color conversion layer 120R and the second color conversion layer 120G may include quantum dots and metal nanoparticles, and the transmission layer 120B may include metal nanoparticles.

[0127] For example, the first pixel P1 may include the first color conversion layer 120R, the second pixel P2 may include the second color conversion layer 120G, and the third pixel P3 may include the transmission layer 120B.

[0128] In an exemplary embodiment, average sizes of quantum dots included in the first color conversion layer 120R and the second color conversion layer 120G may be different from each other.

[0129] In the following, we will Fig.10 The display device of the exemplary embodiment is described in detail in the stacking order in FIG.

[0130] Fig.10 The thin film transistor T1 and the storage capacitor Cst of the pixel circuit in each pixel in the display area DA are shown. For example, the thin film transistor T1 may be a driving thin film transistor or a switching thin film transistor. For ease of description, Fig.10 The elements in the display area DA will be described according to the stacking order.

[0131] The substrate 100 may include a glass material, a ceramic material, a metal material, or a flexible or bendable material. When the substrate 100 is flexible or bendable, the substrate 100 may include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The substrate 100 may have a single layer or multilayer structure of the above materials, and the multilayer structure may further include an inorganic layer. In an exemplary embodiment, the substrate 100 may have a structure including a stacked layer in the order of organic material / inorganic material / organic material.

[0132] A barrier layer (not shown) may be further disposed between the substrate 100 and the first buffer layer 111. The barrier layer may prevent or reduce impurities from penetrating into the semiconductor layer A1 from the substrate 100 or the like. The barrier layer may include an inorganic material such as an oxide material or a nitride material, an organic material, or an inorganic-organic composite material, and may have a single-layer or multi-layer structure including an inorganic material and an organic material.

[0133] The bias electrode BSM may be on the first buffer layer 111 to correspond to the thin film transistor T1. A voltage may be applied to the bias electrode BSM. In addition, the bias electrode BSM may prevent external light from reaching the semiconductor layer A1. Therefore, the characteristics of the thin film transistor T1 may be stabilized. In some cases, the bias electrode BSM may be omitted.

[0134] The semiconductor layer A1 may be on the second buffer layer 112. The semiconductor layer A1 may include amorphous silicon or polycrystalline silicon. In another exemplary embodiment, the semiconductor layer A1 may include at least one oxide selected from the group consisting of: indium (In), gallium (Ga), tin (Sn), zirconium (Zr), vanadium (V), hafnium (Hf), cadmium (Cd), germanium (Ge), chromium (Cr), titanium (Ti), aluminum (Al), cesium (Cs), cerium (Ce) and zinc (Zn). In some exemplary embodiments, the semiconductor layer A1 may include a zinc oxide-based material, for example, zinc oxide, indium zinc oxide, gallium indium zinc oxide, etc. In another exemplary embodiment, the semiconductor layer A1 may include an indium gallium zinc oxide ("IGZO"), indium tin zinc oxide ("ITZO") or indium gallium tin zinc oxide ("IGTZO") semiconductor including ZnO and metals such as indium, gallium and zinc. The semiconductor layer A1 may include a channel region and a source region and a drain region on opposite sides of the channel region. The semiconductor layer A1 may have a single-layer or multi-layer structure.

[0135] The gate electrode G1 is above the semiconductor layer A1, the gate insulating layer 113 is located between the gate electrode G1 and the semiconductor layer A1, and the gate electrode G1 at least partially overlaps the semiconductor layer A1 in a plan view. The gate electrode G1 may include molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may have a single layer or a multilayer structure. As an example, the gate electrode G1 may include a single layer including Mo. The first electrode CE1 of the capacitor Cst is disposed on the same layer as the gate electrode G1. The first electrode CE1 may include the same material as that of the gate electrode G1.

[0136] The interlayer insulating layer 115 may cover the gate electrode G1 and the first electrode CE1 of the storage capacitor Cst. The interlayer insulating layer 115 may include silicon oxide (SiO 2 ), Silicon Nitride (SiN x ), silicon oxynitride (SiON), aluminum oxide (Al 2 O 3 ), titanium oxide (TiO 2 ), Tantalum Oxide (Ta 2 O 5 ), hafnium oxide (HfO 2 ) and zinc oxide (ZnO 2 ) of insulating material.

[0137] The second electrode CE2 of the storage capacitor Cst, the source electrode S1 , the drain electrode D1 , and a data line (not shown) may be on the interlayer insulating layer 115 .

[0138] The second electrode CE2, the source electrode S1, the drain electrode D1, and the data line of the storage capacitor Cst may include a conductive material including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may have a single-layer or multi-layer structure including the above materials. In an exemplary embodiment, the second electrode CE2, the source electrode S1, the drain electrode D1, and the data line have a multi-layer structure including a stacked layer in the order of Ti / Al / Ti. The source electrode S1 and the drain electrode D1 may be connected to the source region or the drain region of the semiconductor layer A1 via a contact hole.

[0139] In a plan view, the second electrode CE2 of the storage capacitor Cst overlaps the first electrode CE1 and forms a capacitor, and the interlayer insulating layer 115 is located between the second electrode CE2 and the first electrode CE1. In this case, the interlayer insulating layer 115 may serve as a dielectric layer of the storage capacitor Cst.

[0140] The second electrode CE2 , the source electrode S1 , the drain electrode D1 , and the data line of the storage capacitor Cst may be covered by the inorganic protective layer PVX.

[0141] The inorganic protective layer PVX may include silicon nitride (SiN x ) and silicon oxide (SiO x ) of a single-layer or multi-layer structure. An inorganic protective layer PVX may be introduced to cover and protect some wiring on the interlayer insulating layer 115. In a partial area of ​​the substrate 100 (e.g., a portion of the peripheral area), wiring (not shown) manufactured together with the data line by the same manufacturing process may be exposed. Due to the etchant used in the patterning of the pixel electrode 310 to be described later, the exposed portion of the wiring may be damaged. However, since the inorganic protective layer PVX according to the exemplary embodiment at least partially covers the data line and the wiring manufactured together with the data line, damage to the wiring during the patterning of the pixel electrode 310 can be prevented.

[0142] The planarization layer 118 is on the inorganic protection layer PVX, and the organic light emitting diode OLED may be on the planarization layer 118 .

[0143] The planarization layer 118 may include a single layer or a multilayer structure including an organic material, and may provide a planarized upper surface. The planarization layer 118 may include a general-purpose polymer (benzocyclobutene ("BCB"), polyimide, hexamethyldisiloxane ("HMDSO"), polymethylmethacrylate ("PMMA"), or polystyrene ("PS")), a polymer derivative having a phenol group, an acrylic polymer, an imide polymer, an aryl ether polymer, an amide polymer, a fluoride polymer, a p-xylene polymer, a vinyl alcohol polymer, and a mixture thereof.

[0144] In the display area DA of the substrate 100, the organic light emitting diode OLED is on the planarization layer 118. The organic light emitting diode OLED includes a pixel electrode 310, an intermediate layer 320 including an organic light emitting layer, and an opposite electrode 330.

[0145] The pixel electrode 310 may be a (semi) transmissive electrode or a reflective electrode. In some exemplary embodiments, the pixel electrode 310 may include a reflective layer and a transparent or semi-transparent electrode layer disposed on the reflective layer, the reflective layer including Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr or a compound thereof. The transparent or semi-transparent electrode layer may include at least one selected from the group consisting of: indium tin oxide (“ITO”), indium zinc oxide (“IZO”), zinc oxide (“ZnO”), indium oxide (“In 2 O 3 ”), indium gallium oxide (“IGO”), and aluminum zinc oxide (“AZO”). In some exemplary embodiments, the pixel electrode 310 may include a stacked layer in the order of ITO / Ag / ITO.

[0146] The pixel defining layer 119 may be on the planarization layer 118. In addition, the pixel defining layer 119 increases the distance between the edge of the pixel electrode 310 and the opposite electrode 330 on the pixel electrode 310 to prevent the generation of an arc at the edge of the pixel electrode 310.

[0147] The pixel defining layer 119 may include one or more organic insulating materials selected from the group consisting of polyimide, polyamide, acrylic resin, BCB, and phenolic resin, and may be manufactured by a spin coating method or the like.

[0148] The intermediate layer 320 of the organic light emitting diode OLED may include an organic light emitting layer. The organic light emitting layer may include an organic material including a fluorescent or phosphorescent material that emits red, green, blue or white light. The organic light emitting layer may include a low molecular organic material or a polymer organic material, and functional layers such as a hole transport layer ("HTL"), a hole injection layer ("HIL"), an electron transport layer ("ETL") and an electron injection layer ("EIL") may be selectively arranged below the organic light emitting layer and on the organic light emitting layer. The intermediate layer 320 may be provided as several blocks so that each block corresponds to each of the plurality of pixel electrodes 310. However, the present invention is not limited thereto. The intermediate layer 320 may be modified in various ways, i.e., it may be provided as one body to cover the plurality of pixel electrodes 310.

[0149] In the drawings, the intermediate layer 320 is provided for each of the first pixel P1, the second pixel P2, and the third pixel P3, but the present invention is not limited thereto. The intermediate layer 320 may be integrally formed with respect to the first pixel P1, the second pixel P2, and the third pixel P3.

[0150] In an exemplary embodiment, the organic light emitting diodes OLED included in the first pixel P1, the second pixel P2 and the third pixel P3 may include an organic light emitting layer emitting the same color light. For example, the organic light emitting diodes OLED included in the first pixel P1, the second pixel P2 and the third pixel P3 may all emit blue light.

[0151] The counter electrode 330 may be a transmissive electrode or a reflective electrode. In some exemplary embodiments, the counter electrode 330 may be a transparent or semi-transparent electrode and may be provided as a metal thin film including Li, Ca, LiF / Ca, LiF / Al, Al, Ag, Mg or a compound thereof having a small work function. In addition, a conductive layer such as ITO, IZO, ZnO or In may be further provided on the metal thin film. 2 O 3The opposing electrode 330 is disposed throughout the display area DA and the peripheral area PA, and is disposed on the intermediate layer 320 and the pixel defining layer 119. The opposing electrode 330 may be integrally provided with respect to the plurality of organic light emitting diodes OLED to correspond to the plurality of pixel electrodes 310.

[0152] A spacer 119S may be further provided on the pixel defining layer 119 for preventing mask recessing. The spacer 119S may be manufactured integrally with the pixel defining layer 119. For example, the spacer 119S and the pixel defining layer 119 may be simultaneously manufactured in the same process by using a half-tone mask process.

[0153] Since the organic light emitting diode OLED is easily damaged by external moisture or oxygen, the organic light emitting diode OLED may be covered and protected by a thin film encapsulation layer 400. The thin film encapsulation layer 400 covers the display area DA and may extend to the outside of the display area DA. The thin film encapsulation layer 400 includes at least one organic encapsulation layer and at least one inorganic encapsulation layer. For example, the thin film encapsulation layer 400 may include a first inorganic encapsulation layer 410, an organic encapsulation layer 420, and a second inorganic encapsulation layer 430.

[0154] The first inorganic encapsulation layer 410 covers the relative electrode 330 and may include silicon oxide, silicon nitride and / or silicon oxynitride. Although not shown in the drawings, other layers such as a covering layer may be provided between the first inorganic encapsulation layer 410 and the relative electrode 330 if necessary. Since the first inorganic encapsulation layer 410 is formed along the structure below it, the first inorganic encapsulation layer 410 has an uneven upper surface. The organic encapsulation layer 420 covers the first inorganic encapsulation layer 410, and unlike the first inorganic encapsulation layer 410, the organic encapsulation layer 420 may have a flat upper surface. In detail, the organic encapsulation layer 420 may flatten the upper surface of the portion corresponding to the display area DA. The organic encapsulation layer 420 may include one or more materials selected from the group consisting of: polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate and hexamethyldisiloxane. The second inorganic encapsulating layer 430 may cover the organic encapsulating layer 420 , and may include silicon oxide, silicon nitride, and / or silicon oxynitride.

[0155] Even when cracks occur in the thin film encapsulation layer 400, the cracks may be disconnected between the first inorganic encapsulation layer 410 and the organic encapsulation layer 420 or between the organic encapsulation layer 420 and the second inorganic encapsulation layer 430 due to the multi-layer structure in the thin film encapsulation layer 400. Thus, generation of a permeation path through which external moisture or oxygen enters the display area DA may be prevented or reduced.

[0156] In an exemplary embodiment, the first and second color conversion layers 120R and 120G and the transmissive layer 120B may be on the upper substrate 160 , facing the substrate 100 .

[0157] The display device has been described, but the present disclosure is not limited thereto. For example, a method of manufacturing a display device may also be included in the scope of the present disclosure.

[0158] FIG. 11A to FIG. 11F are cross-sectional views illustrating processes in a method of manufacturing a display device according to an exemplary embodiment.

[0159] FIG. 11A to FIG. 11E Shows the formation of reference Figure 6 The process of the color filter unit CU. FIG. 11A to FIG. 11E In the embodiment, for the convenience of description, various layers are described as being stacked on the upper substrate 160 in the +z direction, but Fig.11F As shown in , the manufactured color filter unit CU according to the exemplary embodiment may be turned upside down to be attached to the display unit DU. Therefore, the layers will be described in a stacking order on the upper substrate 160. FIG. 11A to FIG. 11E The manufacturing process based on the first pixel P1 is shown, but the second pixel P2 and the third pixel P3 may also be manufactured by the same manufacturing process as the first pixel P1.

[0160] Fig.11A is a cross-sectional view showing a state in which the light shielding layer 130 and the first filter layer 110R are formed on the upper substrate 160 .

[0161] Reference Fig.11A , the light shielding layer 130 and the first filter layer 110R may be formed on the upper substrate 160. In an exemplary embodiment, the light shielding layer 130 defining a hole is formed, and the first filter layer 110R is formed in the hole of the light shielding layer 130. The upper substrate 160 may include a glass material, a ceramic material, a metal material, or a flexible or bendable material. In addition, the upper substrate 160 may have a single-layer or multi-layer structure including the above-mentioned materials.

[0162] The light shielding layer 130 may be between the first filter layer 110R, the second filter layer 110G, and the third filter layer 110B to correspond to the non-emission area NEA. The light shielding layer 130 may include a black matrix and may improve color clarity and contrast. The light shielding layer 130 may include at least one selected from a black pigment, a black dye, and black particles. In some exemplary embodiments, the light shielding layer 130 may include a black matrix such as Cr, CrO X 、Cr / CrO X 、Cr / CrO X / CrN Y, resin (e.g., carbon pigment, RGB mixed pigment), graphite, non-Cr-based materials, etc.

[0163] and Fig.11A In another exemplary embodiment, there may be a height difference between the upper surface 130a of the light shielding layer 130 and the upper surface 110Ra of the first filter layer 110R. For example, the height of the upper surface 110Ra of the first filter layer 110R may be greater than the height of the upper surface 130a of the light shielding layer 130, or the upper surface 110Ra and the upper surface 130a may overlap each other.

[0164] Fig. 11B It is shown that the second insulating layer 140 is formed on Fig.11A A cross-sectional view of the state after the light shielding layer 130 is formed.

[0165] Reference Fig. 11B , a width W1 of the first opening 141R in the first direction (ie, +y direction) may be greater than a width W0 of the first filter layer 110R in the first direction (ie, +y direction).

[0166] In addition, the second insulating layer 140 may include a light shielding material. The light shielding material may include, for example, at least one selected from a black pigment, a black dye, black particles, and metal particles.

[0167] Fig. 11C It is shown that the first insulating layer 150 is formed on Fig. 11B 152R is a cross-sectional view of a state after the second insulating layer 140 is formed and the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R is formed to have hydrophobicity.

[0168] Reference Fig. 11C , a width W2 of the first opening portion 151R in the first direction (ie, +y direction) may be greater than a width W1 of the first opening 141R in the first direction (ie, +y direction).

[0169] The surface 170 of the second insulating layer 140 may be formed by using a material including CF 4 , SF 6 NF 3 The surface 170 is exposed by the first extension portion 152R. The remaining surface of the second insulating layer 140 exposed by the difference between the first opening portion 151R and the first opening 141R may also have hydrophobicity.

[0170] Fig. 11C FIG. 1 shows a case where the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R has hydrophobicity and thus the surface 170 may be as shown in FIG. Figure 7An example of tilt is shown in . In addition, Figure 8 and Fig. 9 As shown in FIG. 1 , the first insulating layer 150 and the second insulating layer 140 may be integrated with each other. For example, the first insulating layer 150 and the second insulating layer 140 may be simultaneously manufactured through the same process using a half-tone mask.

[0171] Fig.11D 14 is a cross-sectional view showing a state in which the first color conversion layer 120R is formed in the first opening 141R defined in the second insulating layer 140 by using the nozzle N. FIG.

[0172] Because in Fig. 11C The ink ejected from the nozzle N does not stay on the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R, but flows into the first opening 141R to form the first color conversion layer 120R. Fig.11D However, the present invention is not limited thereto, that is, as described above, in addition to the surface having hydrophobicity, other various means such as an inclined surface may be used.

[0173] Fig.11E is a cross-sectional view showing a state after forming the first color conversion layer 120R, and Fig.11F It is shown that by Figures 11A to 11E 0 is a cross-sectional view of a state in which a color filter unit CU formed by the process shown in FIG. 1 is coupled to a display unit DU.

[0174] A filler 500 may be further provided between the substrate 100 and the upper substrate 160. The filler 500 may buffer external pressure, etc. The filler 500 may include an organic material such as methyl silicone, phenyl silicone, polyimide, etc. However, one or more exemplary embodiments are not limited thereto, and the filler 500 may include an organic sealant such as a urethane-based resin, an epoxy-based resin, or an acrylic-based resin, or an inorganic sealant such as silicone.

[0175] In the display device according to the exemplary embodiment, the first opening portion 151R of the first insulating layer 150 in the color filter unit CU includes a first extension portion 152R, and when the surface 170 of the second insulating layer 140 (wherein the surface 170 is exposed due to the first extension portion 152R) is hydrophobic or inclined, many nozzles arranged in a row (arranged in the y direction) can be used, and thus an effect with no loss in the takt time of each manufacturing process can be achieved.

[0176] In addition, when the surface 170 of the second insulating layer 140 exposed by the first extension portion 152R and the second extension portion 152G has hydrophobicity or inclination, the ink ejected through the nozzle can flow into the first opening 141R and the second opening 141G to form the first color conversion layer 120R and the second color conversion layer 120G, respectively, and thus an effect with no loss in material can be achieved.

[0177] According to the above exemplary embodiments, a display device having no loss in time of each manufacturing process (ie, takt time) and a method of manufacturing the display device can be realized. However, the scope of the present disclosure is not limited to the above effects.

[0178] It should be understood that the exemplary embodiments described herein should be considered in a descriptive sense only and are not considered for limiting purposes. The description of features or aspects in each exemplary embodiment should typically be considered applicable to other similar features or aspects in other exemplary embodiments. Although one or more exemplary embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made herein without departing from the spirit and scope as defined in the following claims.

Claims

1. A display device, wherein: The display device comprises: a first pixel, a second pixel, and a third pixel that emit light of different colors from each other; a first insulating layer on the first display element of the first pixel, the first insulating layer defining a first opening portion corresponding to the first display element; a second insulating layer on the first insulating layer, the second insulating layer defining a first opening corresponding to the first opening portion; a first color conversion layer disposed in the first opening, the first color conversion layer comprising first quantum dots for converting incident light into first color light; and a first filter layer on the first color conversion layer, wherein the first opening portion has a first extending portion extending in a first direction and at least partially exposing the second insulating layer, The first emission region of the first pixel, the second emission region of the second pixel, and the third emission region of the third pixel have a square shape in a plan view.

2. The display device according to claim 1, wherein: The display device further comprises: a second color conversion layer of a second display element corresponding to the second pixel, the second color conversion layer comprising second quantum dots for converting the incident light into second color light; and a second filter layer on the second color conversion layer, wherein the first insulating layer further defines a second opening portion of the second display element corresponding to the second pixel, The second insulating layer further defines a second opening corresponding to the second opening portion, The second color conversion layer is located in the second opening, and The second opening portion includes a second extending portion extending in a second direction opposite to the first direction and at least partially exposing the second insulating layer.

3. The display device according to claim 2, wherein: The display device further comprises: a transmission layer of a third display element corresponding to the third pixel, the transmission layer comprising scattering particles for scattering the incident light; and a third filter layer on the transmission layer, wherein the first insulating layer further defines a third opening portion of the third display element corresponding to the third pixel, The second insulating layer further defines a third opening corresponding to the third opening portion, The transmission layer is located in the third opening, and The third opening portion includes a third extending portion extending in the first direction and at least partially exposing the second insulating layer.

4. The display device according to claim 3, wherein: The first extending portion, the second extending portion, and the third extending portion have the same width in the first direction or the second direction.

5. The display device according to claim 1, wherein: Extension lines connecting the center of one of the first emission area, the second emission area, and the third emission area to the centers of the other two emission areas intersect each other in a plan view.

6. The display device according to claim 1, wherein: At least one of the first insulating layer and the second insulating layer includes a light shielding material.

7. The display device according to claim 1, wherein: A surface of the second insulating layer exposed by the first extension portion has hydrophobicity.

8. A display device, wherein: The display device comprises: a first pixel, a second pixel, and a third pixel that emit light of different colors from each other; a first insulating layer on the first display element of the first pixel, the first insulating layer defining a first opening portion corresponding to the first display element; a second insulating layer on the first insulating layer, the second insulating layer defining a first opening corresponding to the first opening portion; a first color conversion layer disposed in the first opening, the first color conversion layer comprising first quantum dots for converting incident light into first color light; and a first filter layer on the first color conversion layer, wherein the first opening portion has a first extending portion extending in a first direction and at least partially exposing the second insulating layer, and, Wherein, a surface of the second insulating layer exposed by the first extending portion is inclined.

9. A display device, wherein: The display device comprises: a first pixel, a second pixel, and a third pixel that emit light of different colors from each other; a first insulating layer on the first display element of the first pixel, the first insulating layer defining a first opening portion corresponding to the first display element; a second insulating layer on the first insulating layer, the second insulating layer defining a first opening corresponding to the first opening portion; a first color conversion layer disposed in the first opening, the first color conversion layer comprising first quantum dots for converting incident light into first color light; and a first filter layer on the first color conversion layer, wherein the first opening portion has a first extending portion extending in a first direction and at least partially exposing the second insulating layer, and, Wherein, the first insulating layer and the second insulating layer are provided integrally with each other.

10. The display device according to claim 9, wherein: A surface of the second insulating layer exposed by the first extension portion has hydrophobicity.

11. The display device according to claim 9, wherein: A surface of the second insulating layer exposed by the first extending portion is inclined.

12. A method for manufacturing a display device, wherein: The method comprises: manufacturing a display unit; manufacturing a color filter unit; and combining the display unit with the color filter unit, Wherein, the manufacturing of the color filter unit comprises: forming a light shielding layer on the upper substrate; forming a first filter layer in the aperture defined by the light shielding layer; forming a second insulating layer defining a first opening on the light shielding layer; forming a first insulating layer defining a first opening portion on the second insulating layer, wherein the first opening portion has a first extending portion extending in a first direction and at least partially exposing the second insulating layer; and A first color conversion layer is formed in the first opening, the first color conversion layer including first quantum dots for converting incident light into first color light.

13. The method of claim 12, wherein: The method further comprises: treating the surface of the second insulating layer to have hydrophobicity, Wherein, the surface is exposed by the first extension portion.

14. The method of claim 12, wherein: The method further comprises: processing the surface of the second insulating layer to be inclined, Wherein, the surface is exposed by the first extension portion.

15. The method according to claim 12, wherein: The forming of the first insulating layer and the forming of the second insulating layer are performed simultaneously.

16. The method according to claim 15, wherein: The forming of the first insulating layer and the forming of the second insulating layer are performed by using a half-tone mask.

17. The method according to claim 15, wherein: The method further comprises: treating the surface of the second insulating layer to have hydrophobicity, Wherein, the surface is exposed by the first extension portion.

18. The method according to claim 12, wherein: The forming of the first color conversion layer is performed by an inkjet printing method.

19. The method according to claim 12, wherein: At least one of the first insulating layer and the second insulating layer includes a light shielding material.

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