Display device

Abstract

This display device comprises: a light-emitting panel comprising a first substrate, a plurality of light-emitting diodes arranged on the first substrate, a bank layer comprising a plurality of opening portions, a functional layer arranged within the opening portions of the bank layer, and a plurality of lenses arranged on the functional layer; a color panel arranged on the light-emitting panel and comprising a second substrate and a color filter layer arranged on the second substrate; and a filling layer covering the plurality of lenses between the light-emitting panel and the color panel, and having a lower refractive index than the plurality of lenses, wherein the plurality of lenses comprise a first lens overlapping the functional layer and a second lens overlapping a partition wall of the bank layer.

Description

display device

[0001] Embodiments of the present invention relate to a display device.

[0002] As electronic devices such as mobile phones and large-screen TVs advance, various display devices suitable for them are being developed. For example, liquid crystal displays (LCDs) equipped with backlight units and organic light-emitting diode (OLED) displays that emit different colors of light for each color gamut are gaining popularity among consumers. Recently, display devices equipped with quantum dot color conversion layers (QD-CCLs) have been developed. Quantum dots are excited by incident light and emit light with a wavelength longer than the incident light, which can primarily be used in the low-wavelength range.

[0003] As the uses and applications of display devices have diversified, various design approaches are being attempted to improve their quality. In particular, as display devices advance toward higher resolution, active research is being conducted to improve their color characteristics.

[0004] The information disclosed in this background art is intended only to aid in understanding the background, and therefore the information discussed in this background art does not necessarily constitute prior art.

[0005] Embodiments of the present invention seek to provide a display device having relatively improved light efficiency.

[0006] A display device according to one embodiment of the present invention may include a light emitting panel including a first substrate, a plurality of light emitting diodes disposed on the first substrate, a bank layer including a plurality of openings, a functional layer disposed within the openings of the bank layer, and a plurality of lenses disposed on the functional layer; a color panel disposed on the light emitting panel and including a second substrate and a color filter layer disposed on the second substrate; and a filling layer covering the plurality of lenses between the light emitting panel and the color panel and having a lower refractive index than the plurality of lenses, wherein the plurality of lenses may include a first lens overlapping the functional layer and a second lens overlapping a partition wall of the bank layer.

[0007] In one embodiment, the first lens and the second lens may comprise the same material.

[0008] In one embodiment, the difference between the refractive index of the plurality of lenses and the refractive index of the filling layer may be 0.1 or more and 0.7 or less.

[0009] In one embodiment, the refractive index of the plurality of lenses may be 1.65 or more and 2 or less.

[0010] In one embodiment, the refractive index of the filling layer may be 1.3 or more and 1.6 or less.

[0011] In one embodiment, the thickness of the first lens may be the same as the thickness of the second lens.

[0012] In one embodiment, the thickness of the first lens may be less than the thickness of the second lens.

[0013] In one embodiment, the plurality of lenses may be arranged such that an imaginary line connecting the centers of one lens among the plurality of lenses and the lenses closest to it forms a square.

[0014] In one embodiment, the plurality of lenses may be arranged such that an imaginary line connecting the centers of one lens among the plurality of lenses and the lenses closest to it forms a hexagon.

[0015] In one embodiment, the distance between the centers of each of a pair of adjacent lenses among the plurality of lenses may be equal to the width of each of the lenses.

[0016] In one embodiment, the plurality of lenses may be arranged spaced apart from each other.

[0017] In one embodiment, the plurality of openings of the bank layer include a first opening, a second opening, and a third opening, the functional layer includes a first color conversion layer within the first opening of the bank layer, a second color conversion layer within the second opening of the bank layer, and a third color conversion layer within the third opening of the bank layer, the color filter layer includes a first color filter overlapping the first color conversion layer, a second color filter overlapping the second color conversion layer, and a third color filter overlapping the third color conversion layer, and the first lens may be provided in plurality in each of the regions overlapping the first color conversion layer, the second color conversion layer, and the third color conversion layer.

[0018] In one embodiment, the method may further include a low-refractive layer interposed between the filling layer and the color filter layer and having a refractive index lower than that of the functional layer.

[0019] A display device according to one embodiment of the present invention comprises: a substrate; a plurality of light-emitting elements disposed on the substrate; an encapsulating layer covering the plurality of light-emitting elements; a bank layer disposed on the encapsulating layer and having a plurality of openings; a functional layer disposed within the plurality of openings of the bank layer; a light-collecting layer overlapping the functional layer on the functional layer; a spacer disposed on the functional layer in the same layer as the light-collecting layer and overlapping a partition wall of the bank layer; a filling layer disposed on the light-collecting layer and the spacer; and a color filter layer disposed on the filling layer; wherein the light-collecting layer may have a higher refractive index than the filling layer.

[0020] In one embodiment, the light-collecting layer and the spacer may comprise the same material.

[0021] In one embodiment, the difference in refractive index of the light-collecting layer and the refractive index of the filling layer may be 0.1 or more and 0.7 or less.

[0022] In one embodiment, the thickness of the light-collecting layer may be equal to or less than the thickness of the spacer.

[0023] In one embodiment, the method may further include a low-refractive layer interposed between the filling layer and the color filter layer and having a refractive index lower than that of the functional layer.

[0024] A display device according to one embodiment of the present invention comprises: a light emitting panel including a first substrate, a plurality of light emitting diodes disposed on the first substrate, a bank layer including a plurality of openings, a functional layer disposed within the openings of the bank layer, and a plurality of lenses disposed on the functional layer; a color panel disposed on the light emitting panel and including a second substrate and a color filter layer disposed on the second substrate; and a filling layer disposed between the light emitting panel and the color panel and covering the plurality of lenses, wherein a difference in refractive index between the plurality of lenses and the filling layer may be 0.1 or more and 0.7 or less.

[0025] In one embodiment, the plurality of lenses may have a higher refractive index than the functional layer, and the filling layer may have a lower refractive index than the plurality of lenses.

[0026] According to one embodiment of the present invention, a display device can be provided in which the spacer and lens are formed in the same process step, thereby relatively improving light emission efficiency. Of course, the scope of the present invention is not limited by these effects.

[0027] FIG. 1 is a perspective view schematically showing a display device according to one embodiment of the present invention.

[0028] FIG. 2 is a cross-sectional view schematically illustrating a display device according to one embodiment of the present invention.

[0029] Figure 3 illustrates each optical layer of the functional layer of Figure 2.

[0030] FIG. 4 is an equivalent circuit diagram showing a light-emitting diode included in a display device according to one embodiment of the present invention and a subpixel circuit electrically connected to the light-emitting diode.

[0031] FIG. 5 is a cross-sectional view schematically illustrating a display device according to one embodiment of the present invention.

[0032] Figure 6 is an enlarged view of area 'A' of Figure 5.

[0033] Figure 7 illustrates an example of the shape of a lens.

[0034] FIG. 8 is an enlarged view showing the 'A' area of ​​the display device of FIG. 5 according to one embodiment of the present invention.

[0035] FIG. 9 is an enlarged view showing the 'A' area of ​​the display device of FIG. 5 according to one embodiment of the present invention.

[0036] FIG. 10 is a plan view schematically illustrating an arrangement of a plurality of lenses according to one embodiment of the present invention.

[0037] FIG. 11 is a plan view schematically illustrating an arrangement of a plurality of lenses according to one embodiment of the present invention.

[0038] Fig. 12 is a cross-sectional view schematically illustrating a display device according to one embodiment of the present invention.

[0039] The present invention is capable of various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, as well as the methods for achieving them, will become clearer with reference to the embodiments described in detail below, along with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms.

[0040] In the examples below, the terms first, second, etc. are not used in a limiting sense, but are used for the purpose of distinguishing one component from another.

[0041] In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0042] In the following examples, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not preclude the possibility that one or more other features or components may be added.

[0043] In the following examples, when a part such as a film, region, component, etc. is said to be on or above another part, it includes not only a case where it is directly on top of the other part, but also a case where another film, region, component, etc. is interposed in between.

[0044] For convenience of explanation, the sizes of components in the drawings may be exaggerated or reduced. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to what is shown.

[0045] In this specification, “A and / or B” refers to the case where it is A, or B, or both A and B. In addition, in this specification, “at least one of A and B” refers to the case where it is A, or B, or both A and B.

[0046] In the following embodiments, the meaning of the wiring "extending in the first direction or the second direction" includes not only extending in a straight shape, but also extending in a zigzag or curved shape along the first direction or the second direction.

[0047] In the following examples, when referring to "planar", it means when the target portion is viewed from above, and when referring to "cross-sectional", it means when the target portion is viewed from the side in a cross-section cut vertically. In the following examples, when referring to "overlapping", it includes "planar" and "cross-sectional" overlapping.

[0048] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings, and when describing with reference to the drawings, identical or corresponding components will be given the same drawing reference numerals.

[0049] FIG. 1 is a perspective view schematically illustrating a display device (1) according to one embodiment of the present invention.

[0050] Referring to FIG. 1, a display device (1) may include a display area (DA) that implements an image and a non-display area (NDA) that does not implement an image. The display device (1) may provide an image through an array of a plurality of subpixels that are two-dimensionally arranged on an xy plane in the display area (DA). Each subpixel may emit a different color, and may be, for example, one of a red subpixel, a green subpixel, and a blue subpixel.

[0051] In one embodiment, the plurality of subpixels include a first subpixel (PX1), a second subpixel (PX2), and a third subpixel (PX3). For convenience of explanation, the first subpixel (PX1) is described as a red subpixel, the second subpixel (PX2) is described as a green subpixel, and the third subpixel (PX3) is described as a blue subpixel.

[0052] The first subpixel (PX1), the second subpixel (PX2), and the third subpixel (PX3) are regions that can emit red light, green light, and blue light, respectively, and the display device (1) can provide an image using the light emitted from the subpixels.

[0053] The non-display area (NDA) is an area that does not provide an image and can completely surround the display area (DA). Drivers or main voltage lines that provide electrical signals or power to pixel circuits may be located in the NDA. The NDA may also include pads, areas where electronic components or printed circuit boards can be electrically connected.

[0054] The display area (DA) may have a polygonal shape including a rectangle, as illustrated in FIG. 1. For example, the display area (DA) may have a rectangular shape in which the horizontal length is greater than the vertical length, a rectangular shape in which the horizontal length is less than the vertical length, or a square shape. In one embodiment, the display area (DA) may be a circle, an ellipse, or a polygon such as a triangle or a pentagon. In addition, although the display device (1) of FIG. 1 illustrates a flat panel display device, the display device (1) may be implemented in various forms such as a flexible, foldable, or rollable display device.

[0055] In one embodiment, the display device (1) may be an organic light emitting display device. In one embodiment, the display device (1) may be an inorganic light emitting 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. For convenience of explanation, the following description will be made in detail focusing on the case where the display device (1) is an organic light emitting display device.

[0056] Fig. 2 is a cross-sectional view schematically illustrating a display device (1) according to one embodiment of the present invention.

[0057] Referring to FIG. 2, the display device (1) may include a first substrate (100), a circuit layer (200), a light-emitting diode layer (300), an encapsulation layer (400), a functional layer (500), a color filter layer (600), and a second substrate (700).

[0058] The circuit layer (200) may be disposed on the first substrate (100). The circuit layer (200) includes first to third subpixel circuits (PC1, PC2, PC3), and the first to third subpixel circuits (PC1, PC2, PC3) may each include a thin film transistor and / or a capacitor. Each of the first to third subpixel circuits (PC1, PC2, PC3) may be electrically connected to the first to third light-emitting diodes (LED1, LED2, LED3) of the light-emitting diode layer (300).

[0059] Each of the first to third light-emitting diodes (LED1, LED2, LED3) may include an organic light-emitting diode including an organic material. In one embodiment, each of the first to third light-emitting diodes (LED1, LED2, LED3) may be an inorganic light-emitting diode including an inorganic material. The inorganic light-emitting diode may include a PN junction diode including inorganic semiconductor-based materials. When a voltage is applied in the forward direction to the PN junction diode, holes and electrons are injected, and energy generated by the recombination of the holes and electrons is converted into light energy to emit light of a predetermined color. The above-described inorganic light-emitting diode may have a width of several to several hundred micrometers or several to several hundred nanometers. In some embodiments, the first to third light-emitting diodes (LED1, LED2, LED3) may be a light-emitting diode including quantum dots. As described above, the light-emitting layer of each of the first to third light-emitting diodes (LED1, LED2, LED3) may include an organic material, an inorganic material, a quantum dot, an organic material and a quantum dot, or an inorganic material and a quantum dot.

[0060] The first to third light-emitting diodes (LED1, LED2, LED3) can emit light of the same color. For example, light (e.g., blue light, Lb) emitted from the first to third light-emitting diodes (LED1, LED2, LED3) can pass through the encapsulation layer (400) on the light-emitting diode layer (300) and the functional layer (500). However, the present invention is not limited thereto. In one embodiment, the first to third light-emitting diodes (LED1, LED2, LED3) can emit light of different colors.

[0061] The functional layer (500) may include optical layers that convert or transmit the color of light (e.g., blue light Lb) emitted from the light-emitting diode layer (300) without conversion. For example, the functional layer (500) may include color conversion layers that convert the color of light (e.g., blue light Lb) emitted from the light-emitting diode layer (300) into light of a different color, and a transmission layer that transmits the color of light (e.g., blue light Lb) emitted from the light-emitting diode layer (300) without conversion. The functional layer (500) may include a first color conversion layer (510) corresponding to a first subpixel (PX1), a second color conversion layer (520) corresponding to a second subpixel (PX2), and a transmission layer (530) corresponding to a third subpixel (PX3). The first color conversion layer (510) can convert blue light (Lb) into red light (Lr), and the second color conversion layer (520) can convert blue light (Lb) into green light (Lg). The transmission layer (530) can allow blue light (Lb) to pass through without being converted.

[0062] The color filter layer (600) may be disposed on the functional layer (500). The color filter layer (600) may include first to third color filters (610, 620, 630) of different colors. In one embodiment, the first color filter (610) may be a red color filter, the second color filter (620) may be a green color filter, and the third color filter (630) may be a blue color filter.

[0063] The color purity of the light converted or transmitted in the functional layer (500) can be improved as it passes through the first to third color filters (610, 620, 630), respectively. In addition, the color filter layer (600) can prevent or significantly reduce external light (e.g., light incident from the outside of the display device (1) toward the display device (1)) from being reflected and visible to the user.

[0064] The second substrate (700) may be disposed on the color filter layer (600). The second substrate (700) may be referred to as a light-transmitting substrate layer. The second substrate (700) may include glass or a light-transmitting organic material. For example, the second substrate (700) may include a light-transmitting organic material such as an acrylic resin.

[0065] As an example, a light-emitting panel may be formed by sequentially stacking a circuit layer (200), a light-emitting diode layer (300), an encapsulating layer (400), and a functional layer (500) on a first substrate (100), and a color panel may be formed by stacking a color filter layer (600) on a second substrate (700), and then the light-emitting panel and the color panel may be joined together so that the color filter layer (600) and the functional layer (500) face each other.

[0066] As an example, a functional layer (500) and a color filter layer (600) may be sequentially formed on a sealing layer (400), and then a second substrate (700) may be directly applied and cured on the color filter layer (600).

[0067] In some embodiments, another optical film, such as an anti-reflection (AR) film, may be disposed on the second substrate (700).

[0068] The display device (1) having the structure described above may include an electronic device capable of displaying moving images or still images, such as a television, a billboard, a movie theater screen, a monitor, a tablet PC, a laptop, etc.

[0069] Figure 3 shows each optical layer of the functional layer (500) of Figure 2.

[0070] Referring to FIG. 3, the first color conversion layer (510) can convert incident blue light (Lb) into red light (Lr). As illustrated in FIG. 3, the first color conversion layer (510) can include a first photosensitive polymer (1151), first quantum dots (1152) dispersed in the first photosensitive polymer (1151), and first scattering particles (1153).

[0071] The first quantum dots (1152) can be excited by blue light (Lb) and isotropically emit red light (Lr) having a wavelength longer than the wavelength of the blue light. The first photosensitive polymer (1151) may be an organic material having light transparency. The first scattering particles (1153) can relatively increase the color conversion efficiency by scattering the blue light (Lb) that is not absorbed by the first quantum dots (1152) so that more first quantum dots (1152) are excited. The first scattering particles (1153) may be, for example, titanium oxide (TiO2) or metal particles. The first quantum dots (1152) may be selected from a group II-VI compound, a group III-V compound, a group IV-VI compound, a group IV element, a group IV compound, and a combination thereof.

[0072] The second color conversion layer (520) can convert incident blue light (Lb) into green light (Lg). As illustrated in FIG. 3, the second color conversion layer (520) can include a second photosensitive polymer (1161), second quantum dots (1162) dispersed in the second photosensitive polymer (1161), and second scattering particles (1163).

[0073] The second quantum dots (1162) can be excited by blue light (Lb) and isotropically emit green light (Lg) having a wavelength longer than the wavelength of the blue light. The second photosensitive polymer (1161) can be an organic material having light transparency.

[0074] The second scattering particles (1163) can increase the color conversion efficiency by scattering the blue light (Lb) that is not absorbed by the second quantum dots (1162) so that more second quantum dots (1162) are excited. The second scattering particles (1163) can be, for example, titanium oxide (TiO2) or metal particles. The second quantum dots (1162) can include a group III-VI compound, a group II-VI compound, a group III-V compound, a group I-III-VI compound, a group IV-VI compound, a group IV element or compound, or any combination thereof.

[0075] As an example, the first quantum dots (1152) and the second quantum dots (1162) may be of the same material. In this case, the size of the second quantum dots (1162) may be larger than the size of the first quantum dots (1152).

[0076] In one embodiment, each of the core of the first quantum dot (1152) and the core of the second quantum dot (1162) can be selected from a group III-VI compound, a group II-VI compound, a group III-V compound, a group I-III-VI compound, a group IV-VI compound, a group IV element or compound, or any combination thereof.

[0077] The II-VI group compound is a binary compound selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; a ternary compound selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and a group consisting of four-element compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0078] The Group III-V compound 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, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, and mixtures thereof; and quaternary compounds selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. Meanwhile, the Group III-V compound may further include a Group II element. The group III-V compound further including the group II element may include InZnP, InGaZnP, InAlZnP, etc.

[0079] The above III-VI group compound may include a binary compound such as GaS, Ga2S3, GaSe, Ga2Se3, GaTe, InS, InSe, In2S3, In2Se3, InTe, a ternary compound such as InGaS3, InGaSe3, or any combination thereof.

[0080] The above group I-III-VI compound may include a ternary compound such as AgInS, AgInS2, AgInSe2, AgGaS, AgGaS2, AgGaSe2, CuInS, CuInS2, CuInSe2, CuGaS2, CuGaSe2, CuGaO2, AgGaO2, AgAlO2, a quaternary compound such as AgInGaS2, AgInGaSe2, or any combination thereof. The group IV-VI compound may be selected from the group consisting of a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof, a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof, and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The group IV element may be selected from the group consisting of Si, Ge and mixtures thereof. The group IV compound may be a binary compound selected from the group consisting of SiC, SiGe and mixtures thereof.

[0081] At this time, the binary, ternary or quaternary compound may exist in the particle at a uniform concentration, or may exist in the same particle with the concentration distribution partially divided into different states. In other words, the chemical formula indicates the type of element included in the compound, and the element ratio within the compound may be different. For example, AgInGaS2 is AgIn x Ga 1-x It can mean S2 (where x is a real number between 0 and 1).

[0082] Additionally, each of the first quantum dot (1152) and the second quantum dot (1162) may have a core / shell structure in which one quantum dot surrounds the other. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center.

[0083] In some embodiments, each of the first quantum dot (1152) and the second quantum dot (1162) may have a core-shell structure including a core comprising the aforementioned nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to maintain semiconductor properties by preventing or reducing chemical modification of the core and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be a single layer or a multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of an element present in the shell decreases toward the center. Examples of the shell of the quantum dot include an oxide of a metal or a non-metal, a semiconductor compound, or a combination thereof.

[0084] For example, the oxide of the metal or non-metal is SiO x , Al2O3, TiO2, ZnO x , MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, etc., or ternary compounds such as MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, etc., but the present invention is not limited thereto.

[0085] In addition, the semiconductor compound may be exemplified by CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaS, GaSe, AgGaS, AgGaS2, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the present invention is not limited thereto.

[0086] Each element contained in a multi-element compound, such as the above binary or ternary compound, may exist within the particle in a uniform or non-uniform concentration. In other words, the chemical formula indicates the type of element contained in the compound, and the element ratio within the compound may be different.

[0087] In one embodiment, each of the first quantum dot (1152) and the second quantum dot (1162) may have a full width of 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 color purity or color reproducibility may be improved within this range. In addition, since light emitted by these quantum dots is emitted in all directions, a wide viewing angle may be improved.

[0088] In addition, the shape of each of the first quantum dot (1152) and the second quantum dot (1162) is not particularly limited to a shape commonly used in the field, but more specifically, a shape such as a spherical, pyramidal, multi-arm, or cubic nanoparticle, nanotube, nanowire, nanofiber, or nanoplatelet particle can be used.

[0089] Each of the first quantum dot (1152) and the second quantum dot (1162) can control the color of light emitted depending on the particle size, and accordingly, the first quantum dot (1152) and the second quantum dot (1162) can have various light-emitting colors such as blue, red, and green.

[0090] The transparent layer (530) can transmit blue light (Lb) incident on the transparent layer (530) without converting the blue light (Lb). As illustrated in FIG. 3, the transparent layer (530) can include a third photosensitive polymer (1171) in which third scattering particles (1173) are dispersed. The third photosensitive polymer (1171) can be an organic material having light transmittance, such as a silicone resin or an epoxy resin, and can be the same material as the first and second photosensitive polymers (1151, 1161). The third scattering particles (1173) can scatter and emit blue light (Lb) and can be the same material as the first and second scattering particles (1153, 1163).

[0091] Fig. 4 is an equivalent circuit diagram showing a light emitting diode (LED) included in a display device according to one embodiment of the present invention and a subpixel circuit (PC) electrically connected to the light emitting diode (LED). The subpixel circuit (PC) illustrated in Fig. 4 may correspond to each of the first to third subpixel circuits (PC1, PC2, PC3) described above with reference to Fig. 2, and the light emitting diode (LED) of Fig. 4 may correspond to each of the first to third light emitting diodes (LED1, LED2, LED3) described above with reference to Fig. 2.

[0092] Referring to FIG. 4, a subpixel electrode (e.g., an anode) of a light-emitting diode, for example, a light-emitting diode (LED), may be connected to a subpixel circuit (PC), and a counter electrode (e.g., a cathode) of the light-emitting diode (LED) may be connected to a common voltage line (VSL) or auxiliary wiring that provides a common voltage (ELVSS). The light-emitting diode (LED) may emit light with a brightness corresponding to the amount of current supplied from the subpixel circuit (PC).

[0093] The subpixel circuit (PC) can control the amount of current flowing from the driving voltage line (VDL) to the common voltage line (VSL) via the light emitting diode (LED) in response to a data signal. The subpixel circuit (PC) can include a first thin film transistor (T1), a second thin film transistor (T2), a third thin film transistor (T3), and a storage capacitor (Cst).

[0094] Each of the first thin film transistor (T1), the second thin film transistor (T2), and the third thin film transistor (T3) may be an oxide semiconductor transistor including a semiconductor layer formed of an oxide semiconductor, or a silicon semiconductor transistor including a semiconductor layer formed of polysilicon. Depending on the type of the thin film transistor, the first electrode may be one of a source electrode and a drain electrode, and the second electrode may be the other of the source electrode and the drain electrode.

[0095] The first thin film transistor (T1) may be a driving thin film transistor. A first electrode of the first thin film transistor (T1) may be connected to a driving voltage line (VDL) that supplies a driving voltage (ELVDD), and a second electrode may be connected to a subpixel electrode of a light emitting diode (LED). A gate electrode of the first thin film transistor (T1) may be connected to a first node (N1). The first thin film transistor (T1) may control the amount of current flowing from the driving voltage line (VDL) to the light emitting diode (LED) in response to the voltage of the first node (N1).

[0096] The second thin film transistor (T2) may be a switching thin film transistor. A first electrode of the second thin film transistor (T2) may be connected to a data line (DL), and a second electrode may be connected to a first node (N1). A gate electrode of the second thin film transistor (T2) may be connected to a scan line (SL). The second thin film transistor (T2) may be turned on when a scan signal is supplied to the scan line (SL), thereby electrically connecting the data line (DL) and the first node (N1).

[0097] The third thin film transistor (T3) may be an initialization thin film transistor and / or a sensing thin film transistor. A first electrode of the third thin film transistor (T3) may be connected to a second node (N2), and a second electrode may be connected to a sensing line (ISL). A gate electrode of the third thin film transistor (T3) may be connected to a control line (CL).

[0098] A storage capacitor (Cst) may be connected between a first node (N1) and a second node (N2). For example, a first capacitor electrode of the storage capacitor (Cst) may be connected to a gate electrode of a first thin film transistor (T1), and a second capacitor electrode of the storage capacitor (Cst) may be connected to a subpixel electrode of a light emitting diode (LED).

[0099] In Fig. 4, the first thin film transistor (T1), the second thin film transistor (T2), and the third thin film transistor (T3) are illustrated as NMOS transistors, but the present invention is not limited thereto. For example, at least one of the first thin film transistor (T1), the second thin film transistor (T2), and the third thin film transistor (T3) may be formed as a PMOS transistor.

[0100] Although three thin film transistors are illustrated in FIG. 4, the present invention is not limited thereto. The subpixel circuit (PC) may include four or more thin film transistors.

[0101] Fig. 5 is a cross-sectional view schematically illustrating a display device (1) according to one embodiment of the present invention. Fig. 6 is an enlarged view illustrating area 'A' of Fig. 5. Fig. 7 exemplarily illustrates the shape of a lens.

[0102] Referring to FIGS. 5 to 7, the display device (1) may include a light-emitting panel (10) and a color panel (20). The display device (1) may further include a filling layer (30) disposed between the light-emitting panel (10) and the color panel (20). The display device (1) may be formed by combining the light-emitting panel (10) and the color panel (20) after each is formed. In one embodiment, the light-emitting panel (10), the filling layer (30), and the color panel (20) may be laminated in a thickness direction (e.g., z direction).

[0103] The light-emitting panel (10) may include a first substrate (100), a circuit layer (200) on the first substrate (100), a light-emitting diode layer (300) on the circuit layer (200), an encapsulation layer (400) on the light-emitting diode layer (300), a functional layer (500) on the encapsulation layer (400), and a plurality of lenses (900) on the functional layer (500). The color panel (20) may include a second substrate (700) and a color filter layer (600) on the second substrate (700). In one embodiment, the color panel (20) may further include a low refractive index layer (LRL).

[0104] The circuit layer (200) includes a plurality of subpixel circuits corresponding to the first to third subpixels (PX1, PX2, PX3) described with reference to FIG. 1, and the subpixel circuits may include a plurality of thin film transistors (TFTs) and storage capacitors (Cst) as described with reference to FIG. 4. For example, the thin film transistor (TFT) may be a driving thin film transistor (T1, FIG. 4).

[0105] Hereinafter, the laminated structure of the light-emitting panel (10) will be described in detail.

[0106] The first substrate (100) may include a glass material, a ceramic material, a metal material, or a material having flexible or bendable characteristics. When the first substrate (100) has flexible or bendable characteristics, the first 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 first substrate (100) may have a single-layer or multi-layer structure of the above materials, and in the case of a multi-layer structure, may further include an inorganic layer. In one embodiment, the first substrate (100) may have an organic / inorganic / organic structure.

[0107] A circuit layer (200) may be disposed on a first substrate (100). The circuit layer (200) may include a thin film transistor (TFT) and a storage capacitor (Cst). In one embodiment, the circuit layer (200) may further include a first buffer layer (211), a second buffer layer (212), a gate insulating layer (213), an interlayer insulating layer (215), and a planarization layer (218).

[0108] The first buffer layer (211) may be disposed on the first substrate (100). The first buffer layer (211) may reduce or block the penetration of foreign substances, moisture, contaminants, or external air from the lower portion of the first substrate (100), and may provide a flat surface on the first substrate (100). The first buffer layer (211) may include, for example, an inorganic insulating material such as silicon oxide, silicon oxynitride, or silicon nitride, and may be formed as a single layer or multilayer structure including the aforementioned materials.

[0109] A barrier layer may be further included between the first substrate (100) and the first buffer layer (211). The barrier layer may serve to prevent or significantly reduce impurities from the first substrate (100) or the like from penetrating into the semiconductor layer (Act). The barrier layer may include an inorganic material such as an oxide or a nitride, an organic material, or an organic-inorganic composite, and may be formed of a single-layer or multi-layer structure of an inorganic material and an organic material.

[0110] A bias electrode (BSM) may be arranged on the first buffer layer (211) to correspond to a thin film transistor (TFT). In one embodiment, a voltage may be applied to the bias electrode (BSM). In addition, the bias electrode (BSM) may prevent or reduce external light from reaching the semiconductor layer (Act). Accordingly, the characteristics of the thin film transistor (TFT) may be stabilized. Meanwhile, the bias electrode (BSM) may be omitted in some cases.

[0111] The second buffer layer (212) may be disposed on the first buffer layer (211). In one embodiment, the second buffer layer (212) may be disposed on a bias electrode (BSM). The second buffer layer (212) may include, for example, an inorganic insulating material such as silicon oxide, silicon oxynitride, or silicon nitride, and may be formed as a single layer or multilayer structure including the aforementioned materials.

[0112] A thin film transistor (TFT) may be disposed on a first buffer layer (211). The thin film transistor (TFT) may be disposed on a second buffer layer (212). The thin film transistor (TFT) may include a semiconductor layer (Act), a gate electrode (GE), a source electrode (SE), and a drain electrode (DE). The thin film transistor (TFT) may be connected to first to third light emitting diodes (LED1, LED2, LED3) to drive them.

[0113] The semiconductor layer (Act) may be disposed on the second buffer layer (212). The semiconductor layer (Act) may include, for example, amorphous silicon or polysilicon. In one embodiment, the semiconductor layer (Act) may include an oxide of at least one material 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 embodiments, the semiconductor layer (Act) may be formed of a Zn oxide-based material, such as Zn oxide, In—Zn oxide, Ga—In—Zn oxide, or the like. In one embodiment, the semiconductor layer (Act) may be an IGZO (In-Ga-Zn-O), ITZO (In-Sn-Zn-O), or IGTZO (In-Ga-Sn-Zn-O) semiconductor containing a metal such as indium (In), gallium (Ga), or tin (Sn) in zinc oxide. The semiconductor layer (Act) may include a channel region and a source region and a drain region disposed on both sides of the channel region.

[0114] In order to secure insulation between the semiconductor layer (Act) and the gate electrode (GE), a gate insulating layer (213) may be interposed between the semiconductor layer (Act) and the gate electrode (GE). The gate insulating layer (213) may include, for example, an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxynitride.

[0115] The gate electrode (GE) may be disposed on the semiconductor layer (Act) with the gate insulating layer (213) therebetween. The gate electrode (GE) may overlap at least partially with the semiconductor layer (Act). The gate electrode (GE) may include, for example, molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc. The gate electrode (GE) may be formed as a single layer or multiple layers. For example, the gate electrode (GE) may be a single layer of molybdenum (Mo).

[0116] A storage capacitor (Cst) may be disposed on a gate insulating layer (213). The storage capacitor (Cst) may include a first electrode (CE1) and a second electrode (CE2). The second electrode (CE2) of the storage capacitor (Cst) may overlap the first electrode (CE1) with an interlayer insulating layer (215) therebetween, thereby forming the storage capacitor (Cst). In this case, the interlayer insulating layer (215) may function as a dielectric layer of the storage capacitor (Cst). The first electrode (CE1) of the storage capacitor (Cst) may be disposed on the same layer as the gate electrode (GE). The first electrode (CE1) of the storage capacitor (Cst) may be formed of the same material as the gate electrode (GE). The first electrode (CE1) of the storage capacitor (Cst) may be disposed on the same layer as the gate electrode (GE).

[0117] In Fig. 5, the gate electrode (GE) of the thin film transistor (TFT) and the first electrode (CE1) of the storage capacitor (Cst) are shown to be arranged separately, but the storage capacitor (Cst) may overlap with the thin film transistor (TFT). In this case, the gate electrode (GE) of the thin film transistor (TFT) may function as the first electrode (CE1) of the storage capacitor (Cst).

[0118] The interlayer insulating layer (215) may be disposed on the gate electrode (GE) and the storage capacitor (Cst). The interlayer insulating layer (215) may be disposed to cover the gate electrode (GE) and the storage capacitor (Cst). The interlayer insulating layer (215) may include, for example, silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, or zinc oxide.

[0119] The second electrode (CE2), the source electrode (SE), and the drain electrode (DE) may be disposed on the interlayer insulating layer (215). Each of the second electrode (CE2), the source electrode (SE), and the drain electrode (DE) may include a conductive material including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), or the like, and may be formed as a multilayer or single layer including the above materials. For example, the second electrode (CE2), the source electrode (SE), and the drain electrode (DE) may be formed as a multilayer structure of Ti / Al / Ti. The source electrode (SE) and the drain electrode (DE) may be connected to a source region and a drain region of the semiconductor layer (Act), respectively, through a contact hole.

[0120] The planarization layer (218) may be disposed on the second electrode (CE2), the source electrode (SE), and the drain electrode (DE). The planarization layer (218) may be formed as a single layer or multiple layers of a film made of an organic material, and may provide a flat upper surface. The planarization layer (218) may include, for example, general-purpose polymers such as BCB (Benzocyclobutene), polyimide, HMDSO (Hexamethyldisiloxane), Polymethylmethacrylate (PMMA), Polystyrene (PS), polymer derivatives having phenolic groups, acrylic polymers, imide polymers, aryl ether polymers, amide polymers, fluorinated polymers, p-xylene polymers, vinyl alcohol polymers, and blends thereof.

[0121] A first light emitting diode (LED1), a second light emitting diode (LED2), and a third light emitting diode (LED3) may be disposed on a circuit layer (200). The first light emitting diode (LED1), the second light emitting diode (LED2), and the third light emitting diode (LED3) may be disposed on a planarization layer (218). The first light emitting diode (LED1), the second light emitting diode (LED2), and the third light emitting diode (LED3) may each include a first pixel electrode (310R), a second pixel electrode (310G), and a third pixel electrode (310B). In one embodiment, the first light emitting diode (LED1), the second light emitting diode (LED2), and the third light emitting diode (LED3) may commonly include a light emitting layer (320) and a counter electrode (330).

[0122] The first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B) may be (semi)transparent electrodes or reflective electrodes. In one embodiment, each of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B) may have a reflective layer formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or compounds thereof, and a transparent or translucent electrode layer formed on the reflective layer. The transparent or translucent electrode layer may include at least one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide, indium oxide, indium gallium oxide (IGO), and aluminum zinc oxide (AZO). In one embodiment, each of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B) may be formed of ITO / Ag / ITO.

[0123] A pixel definition layer (219) may be disposed on the planarization layer (218). The pixel definition layer (219) may have openings that expose the central portions of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B), respectively. The pixel definition layer (219) may cover the edges of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B), respectively.

[0124] The pixel definition layer (219) may be formed by a method such as spin coating, using one or more organic insulating materials selected from the group consisting of, for example, polyimide, polyamide, acrylic resin, benzocyclobutene, and phenol resin.

[0125] Each of the light-emitting layers (320) of the first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may include an organic material including a fluorescent or phosphorescent material that emits green, red, blue, or white light. The light-emitting layer (320) may be a low-molecular organic material or a high-molecular 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 further selectively disposed below and above the light-emitting layer (320).

[0126] In FIG. 5, the light-emitting layer (320) is illustrated as being integrally formed over the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B), but this is not limited thereto, and various modifications are possible, such as the light-emitting layer (320) being arranged to correspond to each of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B).

[0127] In one embodiment, the light-emitting layer (320) may be a first color light-emitting layer. The first color light-emitting layer may be integrally formed over the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B), or, if necessary, may be patterned to correspond to each of the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B). The first color light-emitting layer may emit light in a first wavelength band, for example, blue light. In one embodiment, the light-emitting layer (320) may emit light in a wavelength range of 450 nm to 495 nm.

[0128] The counter electrode (330) may be positioned on the light-emitting layer (320) to correspond to the first pixel electrode (310R), the second pixel electrode (310G), and the third pixel electrode (310B). This counter electrode (330) may be formed integrally in a plurality of organic light-emitting elements. In one embodiment, the counter electrode (330) may be a transparent or translucent electrode, and may be formed of a metal thin film having a small work function, including Li, Ca, LiF / Ca, LiF / Al, Al, Ag, Mg, and compounds thereof. In addition, a TCO (transparent conductive oxide) layer, such as ITO, IZO, ZnO, or In2O3, may be further disposed on the metal thin film.

[0129] In one embodiment, a light emitting diode (LED), for example, a first light emitting diode (LED1), a second light emitting diode (LED2), and a third light emitting diode (LED3), may each include a plurality of sequentially stacked light emitting layers (320). For example, the first light emitting diode (LED1), the second light emitting diode (LED2), and the third light emitting diode (LED3) may each include a sequentially stacked first light emitting layer and a sequentially stacked second light emitting layer. A negative charge generation layer and a positive charge generation layer may be disposed between adjacent light emitting layers (320). For example, a negative charge generation layer and a positive charge generation layer may be disposed between the first light emitting layer and the second light emitting layer. In this case, a pixel electrode, a first light emitting layer, a negative charge generation layer, a positive charge generation layer, a second light emitting layer, and a counter electrode (330) may be sequentially stacked in a single light emitting diode (LED). For example, in the first light-emitting diode (LED1), a first pixel electrode (310R), a first light-emitting layer, a negative charge generation layer, a positive charge generation layer, a second light-emitting layer, and a counter electrode (330) may be sequentially stacked. For example, the negative charge generation layer may supply electrons. The negative charge generation layer may be an n-type charge generation layer. The negative charge generation layer may include a host and a dopant. The host may include an organic material. The dopant may include a metallic material. The positive charge generation layer may be a p-type charge generation layer. The positive charge generation layer may supply holes. The positive charge generation layer may include a host and a dopant. The host may include an organic material. The dopant may include a metallic material.

[0130] The first to third light-emitting areas (EA1, EA2, EA3) may correspond to the first to third subpixels (PX1, PX2, PX3), respectively. The first to third light-emitting areas (EA1, EA2, EA3) may be areas in which light generated from the first to third light-emitting diodes (LED1, LED2, LED3) is emitted to the outside, respectively. In one embodiment, the first light-emitting area (EA1) may be defined as a portion exposed by an opening in the pixel definition layer (219) of the first pixel electrode (310R). In one embodiment, the second light-emitting area (EA2) may be defined as a portion exposed by an opening in the pixel definition layer (219) of the second pixel electrode (310G). In one embodiment, the third light-emitting area (EA3) may be defined as a portion exposed by an opening in the pixel definition layer (219) of the third pixel electrode (310B).

[0131] The pixel definition layer (219) may further include a spacer to prevent or reduce mask impression. In one embodiment, the spacer may be formed integrally with the pixel definition layer (219). For example, the spacer and the pixel definition layer (219) may be formed simultaneously in the same process using a halftone mask process.

[0132] The first light emitting diode (LED1), the second light emitting diode (LED2), and the third light emitting diode (LED3) can be easily damaged by moisture or oxygen from the outside, and thus can be protected by being covered with an encapsulating layer (400). The encapsulating layer (400) covers the display area (DA) and can extend to the outside of the display area (DA). The encapsulating layer (400) can include at least one organic encapsulating layer and at least one inorganic encapsulating layer. For example, the encapsulating layer (400) can include a first inorganic encapsulating layer (410), an organic encapsulating layer (420), and a second inorganic encapsulating layer (430).

[0133] Since the first inorganic encapsulating layer (410) is formed along the structure underneath, its upper surface may not be flat. The organic encapsulating layer (420) covers the first inorganic encapsulating layer (410), and unlike the first inorganic encapsulating layer (410), its upper surface may be approximately flat.

[0134] Each of the first inorganic sealing layer (410) and the second inorganic sealing layer (430) may include one or more inorganic materials selected from the group consisting of aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, zinc oxide, silicon oxide, silicon nitride, and silicon oxynitride. The organic sealing layer (420) may include a polymer-based material. Examples of polymer-based materials include acrylic resins, epoxy resins, polyimides, and polyethylene. In one embodiment, the organic sealing layer (420) may include acrylate. The organic sealing layer (420) may be formed by curing a monomer or applying a polymer.

[0135] Even if a crack occurs within the encapsulating layer (400), the multilayer structure of the encapsulating layer (400) described above can prevent or reduce the crack from being connected between the first inorganic encapsulating layer (410) and the organic encapsulating layer (420) or between the organic encapsulating layer (420) and the second inorganic encapsulating layer (430). This can prevent or significantly reduce the formation of a path through which moisture or oxygen from the outside can penetrate into the display area (DA).

[0136] In one embodiment, other layers, such as a capping layer, may be interposed between the first inorganic sealing layer (410) and the counter electrode (330).

[0137] The bank layer (800) may be disposed on the encapsulation layer (400). The bank layer (800) may include an organic material. In some cases, the bank layer (800) may include a light-shielding material to function as a light-shielding layer. The light-shielding material may include, for example, at least one of a black pigment, a black dye, black particles, or metal particles.

[0138] In the bank layer (800), openings (COPs) may be defined as partitions. The openings (COPs) may overlap with each of the first to third light-emitting areas (EA1, EA2, EA3). The openings (COPs) of the bank layer (800) may include a first opening (COP1), a second opening (COP2), and a third opening (COP3). That is, in the bank layer (800), a first opening (COP1) overlapping with the first light-emitting area (EA1), a second opening (COP2) overlapping with the second light-emitting area (EA2), and a third opening (COP3) overlapping with the third light-emitting area (EA3) may be defined.

[0139] The functional layer (500) can fill the opening (COP) of the bank layer (800). In one embodiment, the functional layer (500) can include at least one of a quantum dot and a scattering particle. In one embodiment, the functional layer (500) can include a first color conversion layer (510), a second color conversion layer (520), and a transmission layer (530). The first color conversion layer (510), the second color conversion layer (520), and the transmission layer (530) can be separated by a partition wall of the bank layer (800).

[0140] The first color conversion layer (510) may correspond to the first light-emitting area (EA1). The first color conversion layer (510) may overlap the first light-emitting area (EA1). The first color conversion layer (510) may fill the first opening (COP1) of the bank layer (800). The first color conversion layer (510) may be arranged in the light-emitting direction (e.g., z direction) of the first light-emitting diode (LED1).

[0141] The first color conversion layer (510) can convert light of a first wavelength band generated in the light-emitting layer (320) on the first pixel electrode (310R) into light of a second wavelength band. In one embodiment, the first color conversion layer (510) can convert blue light into red light. For example, when light of a wavelength ranging from 450 nm to 495 nm is generated in the light-emitting layer (320) on the first pixel electrode (310R), the first color conversion layer (510) can convert the light into light of a wavelength ranging from 630 nm to 780 nm. Therefore, in the first subpixel (PX1), light of a wavelength ranging from 630 nm to 780 nm can be emitted to the outside through the second substrate (700).

[0142] The second color conversion layer (520) may correspond to the second light-emitting area (EA2). The second color conversion layer (520) may overlap the second light-emitting area (EA2). The second color conversion layer (520) may fill the second opening (COP2) of the bank layer (800). The second color conversion layer (520) may be arranged in the light-emitting direction (e.g., z direction) of the second light-emitting diode (LED2).

[0143] The second color conversion layer (520) can convert light of the first wavelength band generated in the light-emitting layer (320) on the second pixel electrode (310G) into light of the third wavelength band. For example, the second color conversion layer (520) can convert blue light into green light. For example, when light of a wavelength ranging from 450 nm to 495 nm is generated in the light-emitting layer (320) on the second pixel electrode (310G), the second color conversion layer (520) can convert this light into light of a wavelength ranging from 495 nm to 570 nm. Therefore, in the second subpixel (PX2), light of a wavelength ranging from 495 nm to 570 nm can be emitted to the outside through the second substrate (700).

[0144] The transparent layer (530) may correspond to the third light-emitting area (EA3). The transparent layer (530) may overlap with the third light-emitting area (EA3). The transparent layer (530) may fill the third opening (COP3) of the bank layer (800). The transparent layer (530) may be arranged in the light-emitting direction (e.g., z direction) of the third light-emitting diode (LED3).

[0145] The transparent layer (530) can emit light generated in the light-emitting layer (320) on the third pixel electrode (310B) to the outside without wavelength conversion. For example, the transparent layer (530) can transmit blue light without conversion. For example, when light having a wavelength of 450 nm to 495 nm is generated in the light-emitting layer (320) on the third pixel electrode (310B), the transparent layer (530) can emit the light to the outside without wavelength conversion.

[0146] The first capping layer (CL1) may be disposed on the functional layer (500) and the bank layer (800). The first capping layer (CL1) may be disposed on top of the functional layer (500). In one embodiment, the first capping layer (CL1) may be disposed between the functional layer (500) and a plurality of lenses (900) described below.

[0147] The first capping layer (CL1) can protect the functional layer (500) and the bank layer (800). The first capping layer (CL1) can prevent or reduce damage or contamination of the functional layer (500) and / or the bank layer (800) by impurities such as moisture and / or air from penetrating from the outside. The first capping layer (CL1) can include an inorganic material. In some embodiments, the first capping layer (CL1) may be omitted.

[0148] In one embodiment, only the first capping layer (CL1) is illustrated as being disposed directly on the bank layer (800), but this is not limited thereto. In one embodiment, a light-shielding layer including a light-shielding material may be further disposed between the bank layer (800) and the first capping layer (CL1). The light-shielding layer may be disposed on the bank layer (800) and may overlap with the bank layer (800) in a direction perpendicular to the first substrate (100) (e.g., the z-direction). The light-shielding layer may be disposed on the bank layer (800) and may overlap with a portion of the functional layer (500), but may not overlap with the remaining portion of the functional layer (500). The light-shielding layer may have an opening overlapping with the functional layer (500). The opening of the light-shielding layer may overlap with a portion of the functional layer (500).

[0149] A plurality of lenses (900) may be disposed on the functional layer (500). In one embodiment, a plurality of lenses (900) may be disposed on the first capping layer (CL1). The plurality of lenses (900) may be disposed between the functional layer (500) and the color panel (20). The plurality of lenses (900) may be disposed between the functional layer (500) and the color filter layer (600). The plurality of lenses (900) may be disposed between the functional layer (500) and the low refractive index layer (LRL). The plurality of lenses (900) may be disposed between the functional layer (500) and the filling layer (30). The plurality of lenses (900) may be disposed between the first capping layer (CL1) and the filling layer (30).

[0150] The plurality of lenses (900) may have a higher refractive index than the functional layer (500). The plurality of lenses (900) may have a higher refractive index than the first capping layer (CL1). The refractive index of the plurality of lenses (900) may be, for example, in a range of about 1.65 or more and about 2.0 or less. The width of each of the plurality of lenses (900) may be, for example, in a range of about 0.5 μm or more and about 10 μm or less. In the present specification, the width of each of the plurality of lenses (900) may be defined as the maximum width of the lens.

[0151] The plurality of lenses (900) may include a light-transmitting inorganic material and / or an organic material. For example, the organic material included in the plurality of lenses (900) may include a photocurable material. For example, the organic material included in the plurality of lenses (900) may include an acrylate, an epoxy, and / or an epoxy acrylate. For example, each of the plurality of lenses (900) may include a metal oxide or metal nitride particle such as zinc oxide, titanium oxide, zirconium oxide, niobium oxide, tantalum oxide, tin oxide, nickel oxide, indium nitride, and / or gallium nitride.

[0152] In FIGS. 5 and 6, the plurality of lenses (900) are illustrated as having a hemispherical shape, but this is not limited thereto and may be varied in various ways. For example, the shape of the plurality of lenses (900) may be a hemisphere as illustrated in FIG. 7 (a), a semi-cylindrical shape as illustrated in FIG. 7 (b), a truncated pyramidal shape as illustrated in FIG. 7 (c), or a truncated cone shape as illustrated in FIG. 7 (d).

[0153] As illustrated in FIGS. 5 and 6, the plurality of lenses (900) may include a first lens (910) arranged to overlap the functional layer (500) and a second lens (930) arranged to overlap the partition walls of the bank layer (800). The first lens (910) and the second lens (930) may be formed in the same process step and may include the same material. Accordingly, the refractive indices of the first lens (910) and the second lens (930) may be the same. The first lens (910) and the second lens (930) may be formed in the same process step and may be arranged in the same layer.

[0154] A plurality of first lenses (910) may be arranged in an area overlapping with the functional layer (500). A plurality of first lenses (910) may be arranged in each of the areas overlapping with the openings (COPs) of the bank layer (800). A plurality of first lenses (910) may be provided in each of the areas overlapping with the first color conversion layer (510), the second color conversion layer (520), and the transmission layer (530). The first lenses (910) overlap with the functional layer (500) to change the light path emitted from the functional layer (500), thereby improving light emission efficiency. A set of first lenses (910) may be referred to as a light collection layer.

[0155] The second lens (930) may overlap with the partition wall of the bank layer (800). The second lenses (930) may overlap with the bank layer (800) disposed between the first color conversion layer (510) and the second color conversion layer (520), between the second color conversion layer (520) and the transparent layer (530), or between the first color conversion layer (510) and the transparent layer (530), respectively.

[0156] The second lens (930) may be arranged to overlap with the partition wall of the bank layer (800), thereby functioning as a spacer to maintain a gap between the light-emitting panel (10) and the color panel (20). In this specification, the second lenses (930) may be referred to as spacers.

[0157] According to embodiments of the present invention, by forming a plurality of lenses (900) that can function as a spacer in the manufacturing step of an existing spacer, a spacer and a lens that improves light emission efficiency can be formed simultaneously without adding a separate mask, so there is an economic advantage in the process.

[0158] The first lens (910) and the second lens (930) may have the same shape. For example, if the first lens (910) is hemispherical, the second lens (930) may also be hemispherical. For example, if the first lens (910) is hemicylindrical, the second lens (930) may also be hemicylindrical. As illustrated in FIG. 6, the thickness (T1) of the first lens (910) and the thickness (T2) of the second lens (930) may be substantially the same. However, the thickness (T1) of the first lens (910) and the thickness (T2) of the second lens (930) are not limited to being the same, and the thickness (T1) of the first lens (910) and the thickness (T2) of the second lens (930) may be different depending on embodiments. In this specification, the thickness may be defined as a vertical thickness along a direction perpendicular to the first substrate (100) (e.g., z direction).

[0159] In one embodiment, a pair of adjacent lenses (900) among the plurality of lenses (900) may be in contact with each other. A plurality of first lenses (910) overlapping one opening (COP) of the bank layer (800) may be arranged to be in contact with each other. For example, as illustrated in FIG. 6, a plurality of first lenses (910) overlapping the second color conversion layer (520) may be arranged to be in contact with each other. In one embodiment, the first lens (910) and the second lens (930) may be arranged to be in contact with each other. In one embodiment, the distance between the centers of a pair of adjacent lenses (900) among the plurality of lenses (900) may be equal to the width of one lens (900). In this case, the distance between the adjacent lenses (900) may be in a range of about 0.5 μm to about 10 μm. However, the arrangement of the plurality of lenses (900) may vary depending on the embodiments.

[0160] In one embodiment, the filling layer (30) may be formed to eliminate an air gap between the light-emitting panel (10) and the color panel (20). The filling layer (30) may have a buffering effect against external pressure, etc.

[0161] The filling layer (30) may be disposed on a plurality of lenses (900). The filling layer (30) may be disposed to cover the plurality of lenses (900). The filling layer (30) may be disposed between the functional layer (500) and the color filter layer (600). In one embodiment, the filling layer (30) may be disposed between the functional layer (500) and the low refractive index layer (LRL). The filling layer (30) may be disposed between the plurality of lenses (900) and the color filter layer (600). In one embodiment, the filling layer (30) may be disposed between the plurality of lenses (900) and the low refractive index layer (LRL). The filling layer (30) may be disposed to cover the first lenses (910) and the second lenses (930).

[0162] The filling layer (30) may have a lower refractive index than the plurality of lenses (900). That is, the plurality of lenses (900) may have a higher refractive index than the filling layer (30). The refractive index of the filling layer (30) may be, for example, in a range of about 1.3 or more and about 1.6 or less. For example, the difference between the refractive indices of the plurality of lenses (900) and the refractive index of the filling layer (30) may be in a range of about 0.1 or more and about 0.7 or less. For example, the difference between the refractive indices of the plurality of lenses (900) and the refractive index of the filling layer (30) may be in a range of about 0.2 or more and about 0.7 or less. The difference between the refractive index of the first lens (910) and the refractive index of the filling layer (30) may be in a range of about 0.1 or more and about 0.7 or less. The difference in refractive index of the second lens (930) and the refractive index of the filling layer (30) may be in the range of about 0.1 or more and about 0.7 or less. When the difference in refractive index of the plurality of lenses (900) and the refractive index of the filling layer (30) is about 0.1 or more, it can be confirmed that the light emission efficiency is significantly improved as described with reference to Table 1 below.

[0163] In one embodiment, the filling layer (30) may include a thermosetting material or a photocurable material. The filling layer (30) may be made of an organic material such as methyl silicone, phenyl silicone, or polyimide. However, the present invention is not limited thereto, and the filling layer (30) may also be made of an organic sealant such as a urethane-based resin, an epoxy-based resin, or an acrylic resin, or an inorganic sealant such as silicone. The filling layer (30) may include, for example, hollow silica particles with an empty interior, silica particles with a non-empty interior, nano silicate particles, and / or porogen particles.

[0164] Refractive indexLens sizeLens gapImprovementLens filling layerExperimental example 11.551.518㎛0102%Experimental example 21.651.518㎛0108%Experimental example 31.751.518㎛0113%Experimental example 41.851.518㎛0119%

[0165] Table 1 shows the improvement in light output efficiency of display devices including lenses with different refractive indices. Experimental Examples 1 to 4 each measured the improvement in light output efficiency compared to a display device that did not include a lens. In addition, Experimental Examples 1 to 4 had the same lens size and shape, but only the refractive indices of the lenses were different. Referring to Table 1, it can be confirmed that the improvement in light output efficiency increases as the difference in refractive indices between the lenses and the filling layer increases. In Experimental Example 1, where the difference in refractive indices between the lenses and the filling layer is 0.04, the improvement in light output efficiency is 102%. In Experimental Example 2, where the difference in refractive indices between the lenses and the filling layer is 0.14, the improvement in light output efficiency is 108%. In Experimental Example 3, where the difference in refractive indices between the lenses and the filling layer is 0.24, the improvement in light output efficiency is 113%. In the case of Experimental Example 4, where the difference in refractive index between the lenses and the filling layer is 0.34, the improvement in light output efficiency is 119%.

[0166] In Experimental Example 1, where the difference in refractive indices between the lenses and the filling layer was 0.04, the light output efficiency was improved by 102%, whereas in Experimental Examples 2, 3, and 4, where the difference in refractive indices between the lenses and the filling layer was 0.1 or more, the light output efficiency was improved by 108% or more. In this way, when the difference in refractive indices between the lenses and the filling layer was about 0.1 or more, the light output efficiency was improved.

[0167] Referring again to FIG. 5, the color panel (20) may include a second substrate (700) and a color filter layer (600). In one embodiment, the color panel (20) may further include a low refractive index layer (LRL).

[0168] The light emitted from the light-emitting panel (10) may become incident light incident on the color panel (20). For example, the light emitted from each of the first to third light-emitting diodes (LED1, LED2, LED3) may travel to the color panel (20) as incident light. Some of the incident light may be converted into color and emitted to the outside as it passes through the color panel (20), and other parts of the incident light may pass through the color panel (20) without being converted into color and emitted to the outside.

[0169] The color panel (20) may include a central area (CA) overlapping with light emitting diodes. In one embodiment, the central area (CA) may include a first central area (CA1), a second central area (CA2), and a third central area (CA3). The first central area (CA1) may overlap with the first light emitting diode (LED1) and the first light emitting area (EA1). The second central area (CA2) may overlap with the second light emitting diode (LED2) and the second light emitting area (EA2). The third central area (CA3) may overlap with the third light emitting diode (LED3) and the third light emitting area (EA3).

[0170] For example, light (e.g., blue light, Lb) emitted from a first light-emitting diode (LED1) may be converted into red light (Lr) as it passes through the color panel (20) and emitted to the outside through the first center area (CA1). Light (e.g., blue light, Lb) emitted from a second light-emitting diode (LED2) may be converted into green light (Lg) as it passes through the color panel (20) and emitted to the outside through the second center area (CA2). Light (e.g., blue light, Lb) emitted from a third light-emitting diode (LED3) may be emitted to the outside through the third center area (CA3) without color conversion as it passes through the color panel (20). In this way, the color panel (20) may include a first center area (CA1), a second center area (CA2), and a third center area (CA3) that overlap each of the first to third light-emitting diodes (LED1, LED2, LED3) but emit light of different colors. The first center area (CA1), the second center area (CA2), and the third center area (CA3) of the color panel (20) may correspond to the first subpixel (PX1), the second subpixel (PX2), and the third subpixel (PX3) of the display device (1), respectively. Here, 'corresponding' means that they overlap each other when viewed in a direction perpendicular to one surface of the second substrate (700) (e.g., the +z-axis direction).

[0171] Hereinafter, the laminated structure of the color panel (20) will be described in detail.

[0172] In one embodiment, the second substrate (700) may be disposed over the first substrate (100) with the light emitting diodes interposed therebetween. The second substrate (700) may be referred to as an upper substrate or a light-transmitting substrate layer. The second substrate (700) may be disposed over the color filter layer (600).

[0173] The second substrate (700) may include glass or a polymer resin. If the second substrate (700) has flexible or bendable characteristics, the second substrate (700) may include a polymer resin such as, for example, polyethersulphone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate.

[0174] The color filter layer (600) may be disposed on the second substrate (700). The color filter layer (600) may be disposed on the lower surface of the second substrate (700) located in the direction (e.g., -z direction) toward the first substrate (100) from the second substrate (700). That is, the color filter layer (600) may be disposed under the second substrate (700).

[0175] The color filter layer (600) may include a first color filter (610), a second color filter (620), and a third color filter (630). The first color filter (610) may be disposed on the first central area (CA1). The second color filter (620) may be disposed on the second central area (CA2). The third color filter (630) may be disposed on the third central area (CA3). The first color filter (610) may be disposed at a position corresponding to the first emission area (EA1). The second color filter (620) may be disposed at a position corresponding to the second emission area (EA2). The third color filter (630) may be disposed at a position corresponding to the third emission area (EA3). The first color filter (610) may overlap the first color conversion layer (510). The second color filter (620) may overlap with the second color conversion layer (520). The third color filter (630) may overlap with the transmission layer (530).

[0176] The first to third color filters (610, 620, 630) may include a photosensitive resin. In addition, the first to third color filters (610, 620, 630) may each include a pigment or dye that exhibits a unique color.

[0177] The first color filter (610) may be a red color filter. For example, the first color filter (610) may allow light having a wavelength in the range of 580 nm to 780 nm to pass through. The first color filter (610) may include a red pigment or dye. The second color filter (620) may be a green color filter. For example, the second color filter (620) may allow light having a wavelength in the range of 500 nm to 580 nm to pass through. The second color filter (620) may include a green pigment or dye. The third color filter (630) may be a blue color filter. For example, the third color filter (630) may allow light having a wavelength in the range of 380 nm to 500 nm to pass through. The third color filter (630) may include a blue pigment or dye.

[0178] The color filter layer (600) can reduce the external light reflection of the display device (1). For example, when external light reaches the first color filter (610), only light of the preset wavelength as described above can pass through the first color filter (610), and light of other wavelengths can be absorbed by the first color filter (610). Therefore, among the external light incident on the display device (1), only light of the preset wavelength can pass through the first color filter (610), and some of it can be reflected by the counter electrode (330) and / or the first pixel electrode (310R) underneath and then re-emitted to the outside. Since only some of the external light incident on the location where the first subpixel (PX1) is located is reflected to the outside, it can play a role in reducing the external light reflection. This description can also be applied to the second color filter (620) and the third color filter (630).

[0179] The first color filter (610), the second color filter (620), and the third color filter (630) may overlap each other. The first color filter (610), the second color filter (620), and the third color filter (630) may overlap between one of the central areas (CA) and another of the central areas (CA).

[0180] For example, the first color filter (610), the second color filter (620), and the third color filter (630) may overlap between the first central area (CA1) and the second central area (CA2). In this case, the third color filter (630) may be positioned between the first central area (CA1) and the second central area (CA2). The first color filter (610) may extend from the first central area (CA1) and overlap with the third color filter (630). The second color filter (620) may extend from the second central area (CA2) and overlap with the third color filter (630).

[0181] For example, the first color filter (610), the second color filter (620), and the third color filter (630) may overlap between the second central area (CA2) and the third central area (CA3). The first color filter (610) may be positioned between the second central area (CA2) and the third central area (CA3). The second color filter (620) may extend from the second central area (CA2) and overlap with the first color filter (610). The third color filter (630) may extend from the third central area (CA3) and overlap with the first color filter (610).

[0182] For example, the first color filter (610), the second color filter (620), and the third color filter (630) may overlap between the third central area (CA3) and the first central area (CA1). The second color filter (620) may be positioned between the third central area (CA3) and the first central area (CA1). The third color filter (630) may extend from the third central area (CA3) and overlap with the second color filter (620). The first color filter (610) may extend from the first central area (CA1) and overlap with the second color filter (620).

[0183] As described above, the first color filter (610), the second color filter (620), and the third color filter (630) may overlap to define a light-shielding portion (BM). In one embodiment, the light-shielding portion (BM) may be formed by overlapping two color filter materials selected from the first color filter (610), the second color filter (620), and the third color filter (630). Therefore, the color filter layer (600) may prevent or reduce color mixing even without a separate light-shielding member.

[0184] In one embodiment, the color panel (20) may further include an overcoat layer (OC) disposed on the color filter layer (600). The overcoat layer (OC) may be disposed on the color filter layer (600) to protect the color filter layer (600). The overcoat layer (OC) may include an organic material and may provide a flat surface.

[0185] The low-refractive-index layer (LRL) may be disposed on the color filter layer (600). The low-refractive-index layer (LRL) may be disposed entirely on the color filter layer (600). For example, the low-refractive-index layer (LRL) may be disposed entirely on the first color filter (610), the second color filter (620), and the third color filter (630). The low-refractive-index layer (LRL) may be disposed between the color filter layer (600) and the filling layer (30). The low-refractive-index layer (LRL) may be disposed on the overcoat layer (OC). The low-refractive-index layer (LRL) may be disposed between the overcoat layer (OC) and the filling layer (30).

[0186] The refractive index of the low-refractive-index layer (LRL) may be lower than the refractive index of the functional layer (500). The refractive index of the low-refractive-index layer (LRL) may be lower than the refractive indices of the plurality of lenses (900). The low-refractive-index layer (LRL) may be lower than the refractive indices of the second capping layer (CL2) and the third capping layer (CL3). For example, the refractive index of the low-refractive-index layer (LRL) may have a refractive index of about 1.1 or more and 1.4 or less. In some embodiments, the low-refractive-index layer (LRL) may be omitted.

[0187] The low refractive index layer (LRL) may include an organic material and particles dispersed within the organic material. For example, the low refractive index layer (LRL) may include an organic material such as an acrylic resin, a siloxane resin, a urethane resin, or an imide resin. The low refractive index layer (LRL) may include hollow silica particles with an empty interior, silica particles with a solid interior, nano silicate particles, magnesium fluoride (MgF2), iron oxide (Fe3O4), and / or porogen particles.

[0188] The low refractive index layer (LRL) can reflect some of the light emitted from the functional layer (500) in the direction toward the second substrate (700) back toward the functional layer (500). That is, the low refractive index layer (LRL) can improve light utilization efficiency and improve the light efficiency of the display device (1) by recycling at least some of the light emitted in the direction toward the second substrate (700) by transmitting the functional layer (500).

[0189] A second capping layer (CL2) may be disposed between the low-refractive-index layer (LRL) and the filling layer (30). The second capping layer (CL2) may protect the low-refractive-index layer (LRL). A third capping layer (CL3) may be disposed between the low-refractive-index layer (LRL) and the overcoat layer (OC). The third capping layer (CL3) may protect the color filter layer (600) and the overcoat layer (OC). The second capping layer (CL2) and the third capping layer (CL3) may prevent or reduce damage or contamination of the low-refractive-index layer (LRL) and the color filter layer (600) by impurities such as moisture and / or air from penetrating from the outside, respectively. The second capping layer (CL2) and the third capping layer (CL3) may include an inorganic material or an organic material.

[0190] Fig. 8 is an enlarged view illustrating area 'A' of the display device of Fig. 5 according to one embodiment of the present invention. Fig. 8 is an embodiment in which the arrangement of the plurality of lenses (900) described with reference to Figs. 5 and 6 is changed, and the description will focus on the changed portion.

[0191] Referring to FIG. 8, a plurality of lenses (900) may be arranged to be spaced apart from each other. That is, the plurality of lenses (900) may not be in contact. A plurality of first lenses (910) overlapping one opening (COP, see FIG. 5) of the bank layer (800) may be arranged to be spaced apart from each other. For example, as illustrated in FIG. 8, a plurality of first lenses (910) overlapping the second color conversion layer (520) may be arranged to be spaced apart from each other. In one embodiment, the first lens (910) and the second lens (930) may be arranged to be spaced apart from each other.

[0192] In one embodiment, the distance between the centers of a pair of adjacent lenses (900) among the plurality of lenses (900) may be greater than the width of one lens (900). That is, the pair of adjacent lenses (900) may be spaced apart from each other.

[0193] FIG. 9 is an enlarged view illustrating area 'A' of the display device of FIG. 5 according to one embodiment of the present invention. FIG. 9 is an embodiment in which the arrangement of the plurality of lenses (900) described with reference to FIGS. 5 and 6 is changed, and the description will focus on the changed portion.

[0194] Referring to FIG. 9, the thickness (T3) of the first lens (910) and the thickness (T4) of the second lens (930) may be different from each other. The thickness (T3) of the first lens (910) may be smaller than the thickness (T4) of the second lens (930). The first lens (910) and the second lens (930) having different thicknesses may be simultaneously formed by a halftone mask process. In this case, the first lens (910) and the second lens (930) may include the same material and have similar shapes.

[0195] Although the embodiment of FIG. 9 illustrates a plurality of lenses (900) that are in contact with each other, the present invention is not limited thereto. For example, even in the case where a plurality of lenses (900) are spaced apart from each other, as in the embodiment described with reference to FIG. 8, the thickness of the second lens (930) may be greater than the thickness of the first lens (910).

[0196] Fig. 10 is a plan view schematically illustrating an arrangement of a plurality of lenses according to one embodiment of the present invention. Fig. 10 shows an arrangement of a plurality of lenses (900) arranged on a functional layer (500, see Fig. 5) when viewed in a direction perpendicular to the first substrate (100).

[0197] Referring to FIG. 10, the plurality of lenses (900) may be arranged such that a virtual line (VL1) connecting the centers of one lens among the plurality of lenses (900) and the lenses most adjacent to it forms a square. That is, the number of lenses most adjacent to each of the plurality of lenses (900) may be four. One of the lenses most adjacent to one lens among the plurality of lenses (900) may be arranged along a first direction (e.g., ±y direction), and the other may be arranged along a second direction (e.g., ±x direction) perpendicular to the first direction.

[0198] The distance between the plurality of lenses (900) may be closest in the first direction (e.g., ±y direction) and the second direction (e.g., ±x direction). In one embodiment, the plurality of lenses (900) may be arranged to contact each other along the first direction (e.g., ±y direction) and may be arranged to contact each other along the second direction (e.g., ±x direction).

[0199] Although the embodiment of FIG. 10 illustrates a plurality of lenses (900) that are in contact with each other, the present invention is not limited thereto. For example, even if the plurality of lenses (900) are arranged spaced apart from each other, as in the embodiment described with reference to FIG. 8, the plurality of lenses (900) can form the same arrangement as in FIG. 10.

[0200] Fig. 11 is a plan view schematically illustrating an arrangement of a plurality of lenses according to one embodiment of the present invention. Fig. 11 shows an arrangement of a plurality of lenses (900) arranged on a functional layer (500, see Fig. 5) when viewed in a direction perpendicular to the first substrate (100).

[0201] Referring to FIG. 11, the plurality of lenses (900) may be arranged such that a virtual line (VL2) connecting the centers of one lens among the plurality of lenses (900) and the lenses most adjacent thereto forms a hexagon. That is, the number of lenses most adjacent to each of the plurality of lenses (900) may be six. One of the lenses most adjacent to one lens among the plurality of lenses (900) may be arranged along a first direction (e.g., ±y direction), another may be arranged along a second direction (e.g., ±x direction) perpendicular to the first direction, and still another may be arranged along a third direction that is a diagonal direction between the first direction and the second direction.

[0202] The distance between the plurality of lenses (900) may be closest in the first direction (e.g., ±y direction) and the third direction, which is an oblique direction. In one embodiment, the plurality of lenses (900) may be arranged to contact each other along the first direction (e.g., ±y direction) and may be arranged to contact each other along the third direction, which is an oblique direction.

[0203] Although the embodiment of FIG. 11 illustrates a plurality of lenses (900) that are in contact with each other, the present invention is not limited thereto. For example, even if the plurality of lenses (900) are arranged spaced apart from each other, as in the embodiment described with reference to FIG. 8, the plurality of lenses (900) can form the same arrangement as in FIG. 11.

[0204] Fig. 12 is a cross-sectional view schematically illustrating a display device (1) according to one embodiment of the present invention. Fig. 12 is a modified embodiment of Fig. 5, and descriptions overlapping with those described with reference to Figs. 5 to 7 will be omitted, and descriptions will be focused on the changed parts.

[0205] Referring to FIG. 12, the display device (1) may include a circuit layer (200) sequentially laminated on a first substrate (100), a light-emitting diode layer (300) on the circuit layer (200), an encapsulation layer (400) on the light-emitting diode layer (300), a functional layer (500) on the encapsulation layer (400), a plurality of lenses (900) on the functional layer (500), a filling layer (30) on the plurality of lenses (900), a color filter layer (600) on the filling layer (30), and a light-transmitting substrate layer (700a) on the color filter layer (600). In one embodiment, a low refractive index layer (LRL) may further be included between the filling layer (30) and the color filter layer (600).

[0206] In the embodiment of FIG. 12, a functional layer (500), a plurality of lenses (900), a filling layer (30), and a color filter layer (600) are sequentially formed on a sealing layer (400), and then a light-transmitting substrate layer (700a) is directly applied and cured on the color filter layer (600). For example, the light-transmitting substrate layer (700a) may include a light-transmitting organic material. For example, the light-transmitting substrate layer (700a) may include a light-transmitting organic material such as an acrylic resin.

[0207] The structure of the embodiment of Fig. 12 can be applied identically or similarly to the embodiments described with reference to Figs. 8 to 11.

[0208] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and variations of the embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A light-emitting panel including a first substrate, a plurality of light-emitting diodes arranged on the first substrate, a bank layer including a plurality of openings, a functional layer arranged within the openings of the bank layer, and a plurality of lenses arranged on the functional layer; A color panel disposed on the above light-emitting panel, comprising a second substrate and a color filter layer disposed on the second substrate; and A filling layer covering the plurality of lenses between the light-emitting panel and the color panel and having a lower refractive index than the plurality of lenses, A display device, wherein the plurality of lenses include a first lens overlapping the functional layer and a second lens overlapping the partition of the bank layer.

2. In paragraph 1, A display device, wherein the first lens and the second lens comprise the same material.

3. In paragraph 1, A display device, wherein the difference in refractive index of the plurality of lenses and the refractive index of the filling layer is 0.1 or more and 0.7 or less.

4. In paragraph 1, A display device, wherein the refractive index of the plurality of lenses is 1.65 or more and 2 or less.

5. In paragraph 1, A display device, wherein the refractive index of the above-mentioned filling layer is 1.3 or more and 1.6 or less.

6. In paragraph 1, A display device wherein the thickness of the first lens is the same as the thickness of the second lens.

7. In paragraph 1, A display device, wherein the thickness of the first lens is smaller than the thickness of the second lens.

8. In paragraph 1, A display device wherein the plurality of lenses are arranged such that an imaginary line connecting the centers of one of the plurality of lenses and the lenses closest to it forms a square.

9. In paragraph 1, A display device wherein the plurality of lenses are arranged such that an imaginary line connecting the centers of one of the plurality of lenses and the lenses closest to it forms a hexagon.

10. In paragraph 1, A display device, wherein the distance between the centers of each pair of adjacent lenses among the plurality of lenses is equal to the width of each of the lenses.

11. In paragraph 1, A display device in which the above plurality of lenses are arranged spaced apart from each other.

12. In paragraph 1, The plurality of openings of the above bank layer include a first opening, a second opening, and a third opening, The functional layer includes a first color conversion layer within the first opening of the bank layer, a second color conversion layer within the second opening of the bank layer, and a third color conversion layer within the third opening of the bank layer. The color filter layer includes a first color filter overlapping the first color conversion layer, a second color filter overlapping the second color conversion layer, and a third color filter overlapping the third color conversion layer. A display device, wherein the first lens is provided in multiple numbers in each of the areas overlapping the first color conversion layer, the second color conversion layer, and the third color conversion layer.

13. In paragraph 1, A display device further comprising a low-refractive layer interposed between the filling layer and the color filter layer and having a refractive index lower than the refractive index of the functional layer.

14. Substrate; A plurality of light-emitting elements arranged on the substrate; An encapsulating layer covering the plurality of light-emitting elements; A bank layer disposed on the above-mentioned sealing layer and having a plurality of openings; A functional layer disposed within the plurality of openings of the above bank layer; A light-collecting layer overlapping the functional layer on the functional layer; A spacer disposed in the same layer as the light-collecting layer on the functional layer and overlapping the partition wall of the bank layer; A filling layer disposed on the above light collecting layer and the spacer; and A color filter layer disposed on the above filling layer; A display device, wherein the light-collecting layer has a higher refractive index than the filling layer.

15. In paragraph 14, A display device, wherein the light collecting layer and the spacer comprise the same material.

16. In paragraph 14, A display device, wherein the difference in refractive index of the light-collecting layer and the refractive index of the filling layer is 0.1 or more and 0.7 or less.

17. In paragraph 14, A display device wherein the thickness of the above light collecting layer is equal to or smaller than the thickness of the above spacer.

18. In paragraph 14, A display device further comprising a low-refractive layer interposed between the filling layer and the color filter layer and having a refractive index lower than the refractive index of the functional layer.

19. A light-emitting panel including a first substrate, a plurality of light-emitting diodes arranged on the first substrate, a bank layer including a plurality of openings, a functional layer arranged within the openings of the bank layer, and a plurality of lenses arranged on the functional layer; A color panel disposed on the above light-emitting panel, comprising a second substrate and a color filter layer disposed on the second substrate; and A filling layer is disposed between the light-emitting panel and the color panel and covers the plurality of lenses, A display device, wherein the difference in refractive index of the plurality of lenses and the refractive index of the filling layer is 0.1 or more and 0.7 or less.

20. In paragraph 19, The above plurality of lenses have a higher refractive index than the functional layer, A display device, wherein the filling layer has a lower refractive index than the plurality of lenses.

Images