Display device

Abstract

The display device includes: 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 in 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, the color panel 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, the filling layer having a refractive index lower than a refractive index of the plurality of lenses, in which the plurality of lenses include a first lens overlapping the functional layer and a second lens overlapping the partition wall of the bank layer.

Description

Technical Field

[0001] One or more aspects of an implementation relate to a display device. Background Technology

[0002] With the development of various electronic devices (such as mobile phones and large-screen televisions (TVs), various types of display devices suitable for them are being developed. For example, liquid crystal displays (LCDs) that include backlight units and organic light-emitting displays (OLEDs) that emit different colors of light in each color region have gained popularity among consumers. Recently, display devices that include quantum dot color conversion layers (QD-CCLs) have been developed. Quantum dots are excited by incident light to emit light with a wavelength longer than that of the incident light, and can be used with incident light in a short wavelength band.

[0003] Recently, with the diversification of purposes and applications for display devices, various designs have been developed to improve the quality of display devices. In particular, due to the relatively high resolution that display devices can have, research has been actively conducted to improve the color characteristics of display devices.

[0004] The information disclosed in this Background Art section is intended only to enhance the understanding of the background art, and therefore, the information discussed in this Background Art section need not constitute prior art. Summary of the Invention

[0005] Technical issues

[0006] One or more aspects of the implementation include a display device with relatively improved light efficiency.

[0007] Technical solution

[0008] According to one or more embodiments, a display device includes: a light-emitting panel including a first substrate, a plurality of light-emitting diodes on the first substrate, a barrier layer including a plurality of openings, a functional layer in the openings of the barrier layer, and a plurality of lenses on the functional layer; a color panel on the light-emitting panel, the color panel including a second substrate and a color filter layer on the second substrate; and a filling layer covering the plurality of lenses between the light-emitting panel and the color panel, the filling layer having a refractive index lower than that of the plurality of lenses, wherein the plurality of lenses include a first lens overlapping the functional layer and a second lens overlapping the isolation wall of the barrier layer.

[0009] According to some implementations, the first lens and the second lens may comprise the same material.

[0010] According to some implementations, the difference between the refractive index of the plurality of lenses and the refractive index of the filling layer can be in the range of 0.1 to 0.7.

[0011] According to some implementation methods, the refractive index of the multiple lenses can be in the range of 1.65 to 2.

[0012] According to some implementation methods, the refractive index of the filling layer can be in the range of 1.3 to 1.6.

[0013] According to some implementations, the thickness of the first lens may be equal to the thickness of the second lens.

[0014] According to some implementation methods, the thickness of the first lens may be less than the thickness of the second lens.

[0015] According to some implementations, multiple lenses can be arranged such that a dashed line connecting the centers of the multiple lenses closest to one of the lenses forms a square.

[0016] According to some implementations, the multiple lenses can be arranged such that the dashed line connecting the centers of the multiple lenses closest to one of the lenses forms a hexagon.

[0017] According to some implementations, the distance between the centers of a pair of lenses that are adjacent to each other in a plurality of lenses may be equal to the width of each of the lenses.

[0018] According to some implementations, multiple lenses can be spaced apart from each other.

[0019] According to some embodiments, the multiple openings of the embankment layer may include a first opening, a second opening, and a third opening; the functional layer may include a first color conversion layer in the first opening of the embankment layer, a second color conversion layer in the second opening of the embankment layer, and a third color conversion layer in the third opening of the embankment layer; the color filter layer may include 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 as a plurality of first lenses in the regions that overlap with the first color conversion layer, the second color conversion layer, and the third color conversion layer, respectively.

[0020] According to some embodiments, the display device may further include: a low refractive index layer, located between the filler layer and the color filter layer, wherein the low refractive index layer has a lower refractive index than the functional layer.

[0021] According to one or more embodiments, a display device includes: a substrate; a plurality of light-emitting elements on the substrate; an encapsulation layer covering the plurality of light-emitting elements; a barrier layer on the encapsulation layer and having a plurality of openings; a functional layer in the plurality of openings of the barrier layer; a light-collecting layer on the functional layer and overlapping the functional layer; a spacer on the same layer as the light-collecting layer on the functional layer, the spacer overlapping the isolation wall of the barrier layer; a filler layer on the light-collecting layer and the spacer; and a color filter layer on the filler layer, wherein the light-collecting layer has a refractive index higher than that of the filler layer.

[0022] According to some implementations, the light-collecting layer and the spacer may be made of the same material as each other.

[0023] According to some implementations, the difference between the refractive index of the light-collecting layer and the refractive index of the filling layer can be in the range of 0.1 to 0.7.

[0024] According to some implementations, the thickness of the light-collecting layer may be less than or equal to the thickness of the spacer.

[0025] According to some embodiments, the display device may further include: a low refractive index layer, located between the filler layer and the color filter layer, wherein the low refractive index layer has a lower refractive index than the functional layer.

[0026] According to one or more embodiments, a display device includes: a light-emitting panel including a first substrate, a plurality of light-emitting diodes on the first substrate, a barrier layer including a plurality of openings, a functional layer in the openings of the barrier layer, and a plurality of lenses on the functional layer; a color panel on the light-emitting panel, the color panel including a second substrate and a color filter layer on the second substrate; and a filling layer covering the plurality of lenses between the light-emitting panel and the color panel, wherein the difference between the refractive index of the plurality of lenses and the refractive index of the filling layer is in the range of 0.1 to 0.7.

[0027] According to some implementations, 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.

[0028] Beneficial effects of the invention

[0029] According to one or more embodiments, a display device can be provided that has relatively improved light output efficiency by forming spacers and lenses in the same process operation. However, the scope of embodiments according to this disclosure is not limited to the above-described characteristics. Attached Figure Description

[0030] Figure 1 This is a schematic perspective view of a display device according to some embodiments.

[0031] Figure 2 This is a schematic cross-sectional view of a display device according to some embodiments.

[0032] Figure 3 According to some implementation methods Figure 2 A diagram of each optical layer of the functional layers.

[0033] Figure 4 This is an equivalent circuit diagram of a light-emitting diode (LED) and a sub-pixel circuit electrically connected to the LED, included in a display device according to some embodiments.

[0034] Figure 5This is a schematic cross-sectional view of a display device according to some embodiments.

[0035] Figure 6 According to some implementation methods Figure 5 A magnified view of section "A".

[0036] Figure 7 A diagram illustrating an example of the shape of a lens according to some embodiments.

[0037] Figure 8 According to some implementation methods Figure 5 A magnified view of area "A" of the display device.

[0038] Figure 9 According to some implementation methods Figure 5 A magnified view of area "A" of the display device.

[0039] Figure 10 This is a schematic plan view of the arrangement of multiple lenses according to some embodiments.

[0040] Figure 11 This is a schematic plan view of the arrangement of multiple lenses according to some embodiments.

[0041] Figure 12 This is a schematic cross-sectional view of a display device according to some embodiments. Detailed Implementation

[0042] Because various modifications can be applied and one or more embodiments can be implemented, specific embodiments will be shown in the accompanying drawings and described in detail in the specific embodiments. The effects and features of this disclosure, as well as methods for implementing them, will be illustrated with reference to the embodiments described in detail below with reference to the accompanying drawings. However, embodiments may take different forms and should not be construed as limited to the descriptions set forth herein.

[0043] It will be understood that although the terms “first” and “second” may be used in this document to describe various elements, these elements should not be limited by these terms and these terms are only used to distinguish one element from another.

[0044] In the following implementation, unless the context clearly indicates otherwise, the singular form includes the plural form.

[0045] It will be understood that the terms “comprising,” “including,” and “having” as used herein indicate the presence of a feature or element of the description, but do not preclude the presence or addition of one or more other features or elements.

[0046] It will be further understood that when a layer, zone, or element is referred to as being "on" another layer, zone, or element, it can be directly or indirectly on that other layer, zone, or element. That is, for example, an intermediary layer, zone, or element may exist.

[0047] For ease of explanation, the dimensions of the components in the accompanying drawings may be enlarged. Furthermore, because the dimensions and thicknesses of the components in the accompanying drawings have been arbitrarily interpreted for ease of explanation, the following embodiments are not limited to these.

[0048] In this specification, the expression "A and / or B" indicates A, B, or A and B. Furthermore, the expression "at least one of A and B" indicates A, B, or A and B.

[0049] In the following embodiments, the expression "the line extends in a first direction or a second direction" may include cases where "the line extends in a straight line shape" and cases where "the line extends in a zigzag shape or a curved shape in the first direction or a second direction".

[0050] In the following embodiments, when an element is referred to as "on a plane," it should be understood that the element is viewed from above, and when an element is referred to as "on a cross section," it should be understood that the element is vertically cut and viewed from the side. In the following embodiments, when elements "overlap" each other, the elements "on a plane" and "on a cross section" overlap.

[0051] The embodiments will now be described in detail with reference to the accompanying drawings, in which the same reference numerals denote the same reference elements.

[0052] Figure 1 This is a schematic perspective view of a display device 1 according to some embodiments.

[0053] refer to Figure 1 The display device 1 may include a display area DA in which an image is displayed and a non-display area NDA in which no image is displayed. The display device 1 may display an image by means of a two-dimensional array of multiple sub-pixels placed on the xy plane in the display area DA. Each sub-pixel may emit a different color, and, for example, may be one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

[0054] According to some implementations, the multiple sub-pixels include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3. For ease of description, the following description will focus on the case where the first sub-pixel PX1 is a red sub-pixel, the second sub-pixel PX2 is a green sub-pixel, and the third sub-pixel PX3 is a blue sub-pixel.

[0055] The first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 are areas that can emit red light, green light, and blue light, respectively. The display device 1 can display an image by using the light emitted from the sub-pixels.

[0056] The non-display area NDA is an area that does not display an image and may completely surround the display area DA. Drivers or main voltage lines used to provide electrical signals or power to pixel circuits may be arranged in the non-display area NDA. The non-display area NDA may include pads that serve as areas for electrically connecting electronic components or printed circuit boards.

[0057] The display area DA may have, for example, Figure 1 The quadrilateral shape shown is a polygonal shape. For example, the display area DA can have a rectangular shape with a horizontal length greater than its vertical length, a rectangular shape with a horizontal length less than its vertical length, or a square shape. According to some embodiments, the display area DA can have a circular shape, an elliptical shape, or a polygonal shape (e.g., a triangular shape or a pentagonal shape). Additionally, Figure 1 The display device 1 is shown as a flat panel display device with a flat shape, but the display device 1 can be implemented in various forms (e.g., flexible display device, foldable display device or rollable display device).

[0058] According to some embodiments, display device 1 may be an organic light-emitting display device. According to some embodiments, display device 1 may be an inorganic light-emitting display device or a quantum dot light-emitting display device. For example, the emitting layer of the display element included in display device 1 may include organic materials, inorganic materials, quantum dots, organic materials and quantum dots, inorganic materials and quantum dots, or organic materials, inorganic materials and quantum dots. Hereinafter, for ease of description, the case where display device 1 is an organic light-emitting display device will be described in detail.

[0059] Figure 2 This is a schematic cross-sectional view of a display device 1 according to some embodiments.

[0060] refer to Figure 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.

[0061] The circuit layer 200 may be located on the first substrate 100. The circuit layer 200 may include a first sub-pixel circuit PC1, a second sub-pixel circuit PC2, and a third sub-pixel circuit PC3, and each of the first to third sub-pixel circuits PC1, PC2, and PC3 may include a thin-film transistor and / or a capacitor. The first to third sub-pixel circuits PC1, PC2, and PC3 may be electrically connected to the first light-emitting diode LED1, the second light-emitting diode LED2, and the third light-emitting diode LED3 of the light-emitting diode layer 300, respectively.

[0062] Each of the first to third light-emitting diodes LED1, LED2, and LED3 may include an organic light-emitting diode comprising organic materials. According to some embodiments, each of the first to third light-emitting diodes LED1, LED2, and LED3 may include an inorganic light-emitting diode comprising inorganic materials. The inorganic light-emitting diode may include a PN junction diode comprising inorganic semiconductor materials. When a forward voltage is applied to the PN junction diode, holes and electrons are injected, and the energy generated by the recombination of holes and electrons is converted into light energy, thus emitting light of a predetermined color. The aforementioned inorganic light-emitting diode may have a width of several micrometers to hundreds of micrometers or several nanometers to hundreds of nanometers. In some embodiments, the first to third light-emitting diodes LED1, LED2, and LED3 may include light-emitting diodes comprising quantum dots. As described above, the emitting layer of each of the first to third light-emitting diodes LED1, LED2, and LED3 may include organic materials, including inorganic materials, including quantum dots, including organic materials and quantum dots, or including inorganic materials or quantum dots.

[0063] The first to third light-emitting diodes LED1, LED2, and LED3 can emit light of the same color. For example, the light emitted from the first to third light-emitting diodes LED1, LED2, and LED3 (e.g., blue light Lb) can pass through the functional layer 500 after passing through the encapsulation layer 400 on the light-emitting diode layer 300. However, one or more embodiments are not limited thereto. According to some embodiments, the first to third light-emitting diodes LED1, LED2, and LED3 can emit light of different colors.

[0064] Functional layer 500 may include an optical layer that converts the color of light emitted from LED layer 300 (e.g., blue light Lb) or transmits light without converting its color. For example, functional layer 500 may include a color conversion layer that converts light emitted from LED layer 300 (e.g., blue light Lb) into another color, and a transmission layer that transmits light emitted from LED layer 300 (e.g., blue light Lb) without converting its color. Functional layer 500 may include a first color conversion layer 510 corresponding to a first sub-pixel PX1, a second color conversion layer 520 corresponding to a second sub-pixel PX2, and a transmission layer 530 corresponding to a third sub-pixel PX3. The first color conversion layer 510 converts blue light Lb into red light Lr, and the second color conversion layer 520 converts blue light Lb into green light Lg. The transmission layer 530 allows blue light Lb to pass through without converting its color.

[0065] The color filter layer 600 may be located on the functional layer 500. The color filter layer 600 may include a first color filter 610, a second color filter 620, and a third color filter 630 of different colors. According to some embodiments, 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.

[0066] Light that has undergone color conversion or transmission through the functional layer 500 passes through the first to third color filters 610, 620, and 630, thereby improving color purity. Furthermore, the color filter layer 600 can prevent or significantly reduce the reflection of external light (e.g., light incident on the display device 1 from outside the display device 1) and its visibility to the user.

[0067] The second substrate 700 may be located 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 (e.g., acrylic resin).

[0068] According to some embodiments, after forming a light-emitting panel by sequentially arranging a circuit layer 200, a light-emitting diode layer 300, an encapsulation layer 400 and a functional layer 500 on a first substrate 100, and forming a color panel by stacking a color filter layer 600 on a second substrate 700, the light-emitting panel and the color panel can be bonded together such that the color filter layer 600 and the functional layer 500 face each other.

[0069] According to some embodiments, after the functional layer 500 and the color filter layer 600 are sequentially formed on the encapsulation layer 400, the second substrate 700 can be formed by directly applying and curing it on the color filter layer 600.

[0070] According to some embodiments, another optical film (e.g., an anti-reflective (AR) film) may be located on the second substrate 700.

[0071] The display device 1 having the aforementioned structure may include electronic devices capable of displaying video or still images (e.g., television, billboard, cinema screen, monitor, tablet PC, or laptop computer).

[0072] Figure 3 for Figure 2 A diagram of each optical layer in the 500 functional layers.

[0073] refer to Figure 3 The first color conversion layer 510 can convert incident blue light Lb into red light Lr. For example... Figure 3 As shown, the first color conversion layer 510 may include a first photosensitive polymer 1151 and first quantum dots 1152 and first scattering particles 1153 dispersed in the first photosensitive polymer 1151.

[0074] The first quantum dot 1152 can be excited by blue light Lb to isotropically emit red light Lr with a wavelength longer than that of blue light Lb. The first photosensitive polymer 1151 may comprise an organic material with light-transmitting properties. The first scattering particles 1153 scatter the blue light Lb that is not absorbed by the first quantum dot 1152, thereby exciting more of the first quantum dots 1152 and thus relatively increasing the color conversion efficiency. The first scattering particles 1153 may comprise, for example, titanium oxide (TiO2) or metal particles. The first quantum dot 1152 may be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, and any combination thereof.

[0075] The second color conversion layer 520 can convert incident blue light Lb into green light Lg. For example... Figure 3 As shown, the second color conversion layer 520 may include a second photosensitive polymer 1161 and second quantum dots 1162 and second scattering particles 1163 dispersed in the second photosensitive polymer 1161.

[0076] The second quantum dot 1162 can be excited by blue light Lb to isotropically emit green light Lg with a wavelength longer than that of blue light Lb. The second photosensitive polymer 1161 may include an organic material with light-transmitting properties.

[0077] The second scattering particle 1163 scatters blue light Lb that is not absorbed by the second quantum dot 1162, thereby exciting more of the second quantum dots 1162 and increasing color conversion efficiency. The second scattering particle 1163 may include, for example, TiO2 or metal particles. The second quantum dot 1162 may include group III-VI compounds, group II-VI compounds, group III-V compounds, group I-III-VI compounds, group IV-VI compounds, group IV elements, or any combination thereof.

[0078] According to some embodiments, the first quantum dot 1152 and the second quantum dot 1162 may be made of the same material. In this case, the size of the second quantum dot 1162 may be larger than the size of the first quantum dot 1152.

[0079] According to some embodiments, each of the core of the first quantum dot 1152 and the core of the second quantum dot 1162 may be selected from group III-VI compounds, group II-VI compounds, group III-V compounds, group I-III-VI compounds, group IV-VI compounds, group IV elements or compounds, or any combination thereof.

[0080] Group II-VI compounds may be selected from the group consisting of: binary compounds selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and any mixture thereof; and compounds selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, Cd Ternary compounds selected from the group consisting of ZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and any mixture thereof; and quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and any mixture thereof.

[0081] Group III-V compounds may be selected from the group consisting of: binary compounds selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and any mixture thereof; ternary compounds selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, and any mixture thereof; and quaternary compounds selected from GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and any mixture thereof. Furthermore, Group III-V compounds may further include Group II elements. Further group III-V compounds that include group II elements may include InZnP, InGaZnP, or InAlZnP, etc.

[0082] Group III-VI compounds may include: binary compounds (e.g., GaS, Ga2S3, GaSe, Ga2Se3, GaTe, InS, InSe, In2S3, In2Se3, or InTe); ternary compounds (e.g., InGaS3 or InGaSe3); or any combination thereof.

[0083] Group I-III-VI compounds may include: ternary compounds (e.g., AgInS, AgInS2, AgInSe2, AgGaS, AgGaS2, AgGaSe2, CuInS, CuInS2, CuInSe2, CuGaS2, CuGaSe2, CuGaO2, AgGaO2, or AgAlO2); quaternary compounds (e.g., AgInGaS2 or AgInGaSe2); or any combination thereof. Group IV-VI compounds may be selected from: binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and any mixture thereof; ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and any mixture thereof; and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and any mixture thereof. Group IV elements may be selected from the group consisting of silicon (Si), germanium (Ge), and any mixture thereof. Group IV compounds may be binary compounds selected from the group consisting of SiC, SiGe, and any mixture thereof.

[0084] In this case, binary, ternary, or quaternary compounds can exist in a uniform concentration within the particle, or they can be divided into two states with partially different concentration distributions existing within the same particle. That is, the chemical formula above refers to the types of elements included in the compound, and the proportions of these elements in the compound can vary. For example, AgInGaS2 can refer to AgIn... x Ga 1-x S2 (x is a real number between 0 and 1).

[0085] Furthermore, 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 quantum dot. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center.

[0086] In some embodiments, each of the first quantum dot 1152 and the second quantum dot 1162 may have the aforementioned core-shell structure, which includes a core comprising nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer for maintaining semiconductor properties by preventing or reducing chemical denaturation of the core and / or as a charging layer for imparting electrophoretic properties to the quantum dot. The shell may comprise a single layer or multiple layers. 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. Examples of shells for quantum dots may include oxides of metals or nonmetals, semiconductor compounds, and combinations thereof.

[0087] Examples of oxides of metals or nonmetals can include binary compounds (e.g., SiO₂). x Al2O3, TiO2, ZnO x MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 or NiO) and ternary compounds (e.g., MgAl2O4, CoFe2O4, NiFe2O4 or CoMn2O4), but not limited to these.

[0088] Examples of semiconductor compounds may include, but are not limited to, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaS, GaSe, AgGaS, AgGaS2, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb.

[0089] In multi-element compounds (e.g., binary or ternary compounds), each element may exist in the particles at a uniform or non-uniform concentration. That is, the chemical formula above refers to the types of elements included in the compound, and the proportions of elements in the compound may vary.

[0090] According to some embodiments, each of the first quantum dot 1152 and the second quantum dot 1162 may have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and color purity and color reproducibility can be improved within this range. Furthermore, because light emitted through the quantum dots is emitted in all directions, the optical viewing angle can be improved.

[0091] Furthermore, the shape of each of the first quantum dot 1152 and the second quantum dot 1162 is not specifically limited to the shapes commonly used in the art, but more specifically, spherical nanoparticles, conical nanoparticles, multi-armed nanoparticles or cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplate particles, etc., may be used.

[0092] Each of the first quantum dot 1152 and the second quantum dot 1162 can adjust the color of the emitted light depending on the particle size, and accordingly, the first quantum dot 1152 and the second quantum dot 1162 can emit light with various emission colors (e.g., blue, red, and green).

[0093] The transmission layer 530 can transmit blue light Lb incident on it without converting it. For example... Figure 3As shown, the transmissive layer 530 may include a third photosensitive polymer 1171 in which third scattering particles 1173 are dispersed. For example, the third photosensitive polymer 1171 may include an organic material (e.g., silicone or epoxy resin) having light-transmitting properties, and the third photosensitive polymer 1171 may include the same material as the first photosensitive polymer 1151 and the second photosensitive polymer 1161. The third scattering particles 1173 can scatter and emit blue light Lb, and the third scattering particles 1173 may include the same material as the first scattering particles 1153 and the second scattering particles 1163.

[0094] Figure 4 This is an equivalent circuit diagram of a light-emitting diode (LED) and a sub-pixel circuit (PC) electrically connected to the LED, which are included in a display device according to some embodiments. Figure 4 The sub-pixel circuit PC shown in the figure corresponds to the one in the reference above. Figure 2 Each of the first to third sub-pixel circuits PC1, PC2, and PC3 is described, and Figure 4 The light-emitting diode (LED) can correspond to each of the first to third light-emitting diodes LED1, LED2 and LED3.

[0095] refer to Figure 4 The sub-pixel electrode (e.g., anode) of a light-emitting diode (e.g., LED) may be connected to a sub-pixel circuit PC, and the counter electrode (e.g., cathode) of the LED may be connected to a common voltage line VSL or auxiliary wire that provides a common voltage ELVSS. The LED may emit light with a brightness corresponding to the amount of current supplied from the sub-pixel circuit PC.

[0096] The sub-pixel circuit PC can be configured to control the amount of current flowing from the driving voltage line VDL through the light-emitting diode (LED) to the common voltage line VSL in response to a data signal. The sub-pixel circuit PC may include a first thin-film transistor (TFT) T1, a second TFT T2, a third TFT T3, and a storage capacitor Cst.

[0097] Each of the first thin-film transistor T1, the second thin-film transistor T2, and the third thin-film transistor T3 may include an oxide semiconductor transistor comprising a semiconductor layer comprising oxide semiconductor; or may include a silicon semiconductor transistor comprising a semiconductor layer comprising polycrystalline silicon. Depending on the type of 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 a source electrode and a drain electrode.

[0098] The first thin-film transistor T1 may be a driving thin-film transistor. The first electrode of the first thin-film transistor T1 may be connected to a driving voltage line VDL through which a driving voltage ELVDD is supplied, and the second electrode of the first thin-film transistor T1 may be connected to a sub-pixel electrode of a light-emitting diode (LED). The gate electrode of the first thin-film transistor T1 may be connected to a first node N1. The first thin-film transistor T1 may be configured to control the amount of current flowing from the driving voltage line VDL to the LED in response to a voltage at the first node N1.

[0099] The second thin-film transistor T2 can be a switching thin-film transistor. The first electrode of the second thin-film transistor T2 can be connected to the data line DL, and the second electrode of the second thin-film transistor T2 can be connected to the first node N1. The gate electrode of the second thin-film transistor T2 can be connected to the scan line SL. When a scan signal is supplied through the scan line SL, the second thin-film transistor T2 can be turned on and can be configured to electrically connect the data line DL to the first node N1.

[0100] The third thin-film transistor T3 can be an initialization thin-film transistor and / or a sensing thin-film transistor. The first electrode of the third thin-film transistor T3 can be connected to the second node N2, and the second electrode of the third thin-film transistor T3 can be connected to the sensing line ISL. The gate electrode of the third thin-film transistor T3 can be connected to the control line CL.

[0101] The storage capacitor Cst can be connected between the first node N1 and the second node N2. For example, the first capacitor electrode of the storage capacitor Cst can be connected to the gate electrode of the first thin-film transistor T1, and the second capacitor electrode of the storage capacitor Cst can be connected to the sub-pixel electrode of the light-emitting diode LED.

[0102] although Figure 4 The first thin-film transistor T1, the second thin-film transistor T2, and the third thin-film transistor T3 are described as n-channel metal-oxide-semiconductor field-effect transistors (MOSFETs) (NMOS), but one or more embodiments are not limited thereto. For example, at least one of the first thin-film transistor T1, the second thin-film transistor T2, or the third thin-film transistor T3 may be formed as a p-channel MOSFET (PMOS).

[0103] Despite Figure 4 The diagram shows three thin-film transistors, but one or more embodiments are not limited thereto. The sub-pixel circuit PC may include four or more thin-film transistors.

[0104] Figure 5 This is a schematic cross-sectional view of a display device 1 according to some embodiments. Figure 6 for Figure 5 A magnified view of section "A". Figure 7 An example diagram illustrating the shape of a lens.

[0105] refer to Figures 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 filler layer 30 between the light-emitting panel 10 and the color panel 20. The display device 1 can be formed by separately forming the light-emitting panel 10 and the color panel 20 and then combining the light-emitting panel 10 and the color panel 20. According to some embodiments, the light-emitting panel 10, the filler layer 30, and the color panel 20 may be stacked in the thickness direction (e.g., the z-direction).

[0106] 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. According to some embodiments, the color panel 20 may further include a low refractive index layer (LRL).

[0107] Circuit layer 200 may include components corresponding to those already referenced. Figure 1 The description includes multiple sub-pixel circuits for the first to third sub-pixels PX1, PX2, and PX3, and the sub-pixel circuits may include those as shown in the reference. Figure 4 The description includes multiple thin-film transistors (TFTs) and a storage capacitor Cst. For example, the thin-film transistor TFT may include a driving thin-film transistor T1 (see...). Figure 4 ).

[0108] The stacking structure of the light-emitting panel 10 is described in detail below.

[0109] The first substrate 100 may comprise glass, ceramic, metallic, or flexible or bendable materials. When the first substrate 100 is flexible or bendable, it may comprise a polymer resin (e.g., 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 aforementioned materials, and when it has a multi-layer structure, it may further comprise an inorganic layer. According to some embodiments, the first substrate 100 may have an organic / inorganic / organic material structure.

[0110] The circuit layer 200 may be located on the first substrate 100. The circuit layer 200 may include a thin-film transistor (TFT) and a storage capacitor (Cst). According to some embodiments, the circuit layer 200 may further include a first buffer layer 211, a second buffer layer 212, a gate insulating layer 213, a sandwich insulating layer 215, and a planarization layer 218.

[0111] A first buffer layer 211 may be located on the first substrate 100. The first buffer layer 211 may prevent or reduce the penetration of foreign matter, moisture, contaminants or external air from the bottom 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 layer (e.g., silicon oxide, silicon oxynitride and silicon nitride) and may have a single-layer structure or a multi-layer structure including the aforementioned materials.

[0112] An isolation layer may be further included between the first substrate 100 and the first buffer layer 211. The isolation layer can prevent or significantly reduce the penetration of impurities from the first substrate 100 into the semiconductor layer Act. The isolation layer may include inorganic materials (e.g., oxides or nitrides), organic materials, or organic-inorganic composite materials, and may include a single-layer structure or a multi-layer structure of inorganic and organic materials.

[0113] The bias electrode BSM may be located on the first buffer layer 211 to correspond to the thin-film transistor (TFT). According to some embodiments, a voltage may be applied to the bias electrode BSM. Furthermore, the bias electrode BSM can prevent or reduce external light from reaching the semiconductor layer Act. Accordingly, the characteristics of the thin-film transistor (TFT) can be stable. Alternatively, the bias electrode BSM may be omitted if necessary.

[0114] The second buffer layer 212 may be located on the first buffer layer 211. According to some embodiments, the second buffer layer 212 may be located on the bias electrode BSM. The second buffer layer 212 may include, for example, an inorganic insulating material (e.g., silicon oxide, silicon oxynitride, and silicon nitride) and may have a single-layer structure or a multilayer structure including the aforementioned materials.

[0115] The thin-film transistor (TFT) may be located on the first buffer layer 211. The thin-film transistor (TFT) may be located on the 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 and drive the first to third light-emitting diodes LED1, LED2, and LED3.

[0116] The semiconductor layer Act may be located on the second buffer layer 212. The semiconductor layer Act may include, for example, amorphous silicon or polycrystalline silicon. According to some embodiments, 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 include Zn oxide materials (e.g., Zn oxide, In-Zn oxide, and Ga-In-Zn oxide). According to some embodiments, the semiconductor layer Act may be an In-Ga-Zn-O (IGZO) semiconductor, an In-Sn-Zn-O (ITZO) semiconductor, or an In-Ga-Sn-Zn-O (IGTZO) semiconductor that includes a metal (e.g., In, Ga, or Sn) in zinc oxide. The semiconductor layer Act may include a channel region and source and drain regions on both sides of the channel region.

[0117] To ensure insulation between the semiconductor layer Act and the gate electrode GE, a gate insulating layer 213 may be provided between the semiconductor layer Act and the gate electrode GE. The gate insulating layer 213 may also comprise, for example, inorganic materials (e.g., silicon oxide, silicon nitride, and / or silicon oxynitride).

[0118] The gate electrode GE may be located on the semiconductor layer Act, and the gate insulating layer 213 is located between the gate electrode GE and the semiconductor layer Act. The gate electrode GE may at least partially overlap with the semiconductor layer Act. The gate electrode GE may include, for example, molybdenum (Mo), Al, copper (Cu), or Ti. The gate electrode GE may have a monolayer structure or a multilayer structure. For example, the gate electrode GE may have a monolayer structure of Mo.

[0119] The storage capacitor Cst may be located on the 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 with the first electrode CE1, and a sandwich insulating layer 215 is located between the second electrode CE2 and the first electrode CE1 of the storage capacitor Cst, and the first electrode CE1 and the second electrode CE2 may form the storage capacitor Cst. In this case, the sandwich insulating layer 215 may serve as the dielectric layer of the storage capacitor Cst. The first electrode CE1 and the gate electrode GE of the storage capacitor Cst may be arranged on the same layer. The first electrode CE1 and the gate electrode GE may include the same material.

[0120] although Figure 5This paper explains that the gate electrode GE of the thin-film transistor (TFT) and the first electrode CE1 of the storage capacitor Cst are arranged separately, but the storage capacitor Cst can overlap with the TFT. In this case, the gate electrode GE of the TFT can be used as the first electrode CE1 of the storage capacitor Cst.

[0121] The interlayer insulating layer 215 may be located on the gate electrode GE and the storage capacitor Cst. The interlayer insulating layer 215 may be arranged 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.

[0122] The second electrode CE2, source electrode SE, and drain electrode DE may be located on the interlayer insulating layer 215. Each of the second electrode CE2, source electrode SE, and drain electrode DE may include a conductive material comprising Mo, Al, Cu, or Ti, and may include multiple layers or a single layer comprising the aforementioned materials. For example, each of the second electrode CE2, source electrode SE, and drain electrode DE may have a Ti / Al / Ti multilayer structure. The source electrode SE and drain electrode DE may be connected to the source and drain regions of the semiconductor layer Act, respectively, through contact holes.

[0123] Planarization layer 218 may be located on the second electrode CE2, source electrode SE, and drain electrode DE. Planarization layer 218 may comprise a single layer or multiple layers containing organic material layers and may provide a flat upper surface. Planarization layer 218 may comprise, for example, general-purpose polymers (such as benzocyclobutene (BCB), polyimide, hexamethyldisiloxane (HMDSO), poly(methyl methacrylate) (PMMA), or 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 any blends thereof.

[0124] The first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may be located on the circuit layer 200. The first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may be located on the 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. According to some embodiments, the first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may commonly include an emitting layer 320 and a counter electrode 330.

[0125] The first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B may include (semi-)transmissive electrodes or reflective electrodes. According to some embodiments, each of the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B may include a reflective layer and a transparent electrode layer or a semi-transparent electrode layer formed on the reflective layer, wherein the reflective layer may include silver (Ag), magnesium (Mg), Al, platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), Cr, and any compounds thereof. The transparent electrode layer or the semi-transparent electrode layer may include at least one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide, indium oxide, indium gallium oxide (IGO), and aluminum zinc oxide (AZO). According to some embodiments, each of the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B may have an ITO / Ag / ITO structure.

[0126] Pixel defining layer 219 may be located on planarization layer 218. Pixel defining layer 219 may include openings that expose first pixel electrode 310R, second pixel electrode 310G, and third pixel electrode 310B, respectively. Pixel defining layer 219 may cover the edges of first pixel electrode 310R, second pixel electrode 310G, and third pixel electrode 310B.

[0127] The pixel defining layer 219 may include one or more organic insulating materials selected from the group consisting of polyimide, polyamide, acrylic resin, BCB and phenolic resin, and may be formed by a method such as spin coating.

[0128] Each of the 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 fluorescent or phosphorescent materials that emit green, red, blue, or white light. The emitting layer 320 may be a low molecular weight organic material or a polymeric organic material, and functional layers (e.g., hole transport layer (HTL), hole injection layer (HIL), electron transport layer (ETL), and electron injection layer (EIL)) may optionally be further arranged below and above the emitting layer 320.

[0129] Figure 5 This illustration describes an emitter layer 320 integrally formed across the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B, but it is not limited to this. The emitter layer 320 can be arranged corresponding to each of the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B. Various modifications are possible.

[0130] According to some embodiments, the emitting layer 320 may include a first color emitting layer. The first color emitting layer may be integrally formed as a single unit across the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B, and may be patterned, if necessary, to correspond to each of the first pixel electrode 310R, the second pixel electrode 310G, and the third pixel electrode 310B. The first color emitting layer may emit light in a first wavelength band, for example, it may emit blue light. According to some embodiments, the emitting layer 320 may emit light having a wavelength of about 450 nm to about 495 nm.

[0131] Counter electrode 330 may be located on emitter layer 320 to correspond to first pixel electrode 310R, second pixel electrode 310G, and third pixel electrode 310B. In multiple organic light-emitting elements, counter electrode 330 may be integrally formed as a single unit. According to some embodiments, counter electrode 330 may be a transparent electrode or a translucent electrode, and may include a metal thin film having a low work function and comprising lithium (Li), calcium (Ca), lithium fluoride (LiF) / Ca, LiF / Al, Al, Ag, Mg, or any compound thereof. Furthermore, a transparent conductive oxide (TCO) layer comprising ITO, IZO, ZnO, or In2O3 may be further located on the metal thin film.

[0132] According to some embodiments, a light-emitting diode (LED), such as each of a first LED (LED1), a second LED (LED2), and a third LED (LED3), may include a plurality of emitter layers 320 stacked in sequence. For example, each of the first LED (LED1), the second LED (LED2), and the third LED (LED3) may include a first emitter layer and a second emitter layer stacked in sequence. A negative charge generation layer and a positive charge generation layer may be located between adjacent emitter layers 320. For example, a negative charge generation layer and a positive charge generation layer may be located between the first emitter layer and the second emitter layer. In this case, in a light-emitting diode (LED), a pixel electrode, a first emitter layer, a negative charge generation layer, a positive charge generation layer, a second emitter layer, and a counter electrode 330 may be stacked in sequence. For example, in the first LED (LED1), a first pixel electrode 310R, a first emitter layer, a negative charge generation layer, a positive charge generation layer, a second emitter layer, and a counter electrode 330 may be stacked in sequence. For example, the negative charge generation layer may supply electrons. The negative charge generation layer may include 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 include 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.

[0133] The first to third emission regions EA1, EA2, and EA3 may correspond to the first to third sub-pixels PX1, PX2, and PX3, respectively. The first to third emission regions EA1, EA2, and EA3 may be regions in which light generated from the first to third light-emitting diodes LED1, LED2, and LED3, respectively, is emitted to the outside. According to some embodiments, the first emission region EA1 may be defined as the portion of the first pixel electrode 310R exposed by the opening in the pixel defining layer 219. According to some embodiments, the second emission region EA2 may be defined as the portion of the second pixel electrode 310G exposed by the opening in the pixel defining layer 219. According to some embodiments, the third emission region EA3 may be defined as the portion of the third pixel electrode 310B exposed by the opening in the pixel defining layer 219.

[0134] The pixel defining layer 219 may further include spacers for preventing or reducing mask defects. According to some embodiments, the spacers may be integrally formed with the pixel defining layer 219 as a single unit. For example, the spacers and the pixel defining layer 219 can be formed simultaneously in the same process using a halftone masking process.

[0135] The first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) are easily damaged by external moisture or oxygen, and therefore can be covered and protected by the encapsulation layer 400. The encapsulation layer 400 can cover the display area DA and extend to the outside of the display area DA. The encapsulation layer 400 may include at least one organic encapsulation layer and at least one inorganic encapsulation layer. For example, the encapsulation layer 400 may include a first inorganic encapsulation layer 410, an organic encapsulation layer 420, and a second inorganic encapsulation layer 430.

[0136] The first inorganic encapsulation layer 410 is formed along the structure beneath it and therefore may not have a flat upper surface. An organic encapsulation layer 420 may cover the first inorganic encapsulation layer 410. Unlike the first inorganic encapsulation layer 410, the upper surface of the organic encapsulation layer 420 may be substantially flat.

[0137] Each of the first inorganic encapsulation layer 410 and the second inorganic encapsulation layer 430 may include one or more inorganic materials selected from alumina, titanium oxide, tantalum oxide, hafnium oxide, zinc oxide, silicon oxide, silicon nitride, and silicon oxynitride. The organic encapsulation layer 420 may include polymeric materials. Polymeric materials may include acrylic resins, epoxy resins, polyimides, and polyethylene. According to some embodiments, the organic encapsulation layer 420 may include acrylates. The organic encapsulation layer 420 may be formed by curing monomers or coating polymers.

[0138] Even when cracks appear in the encapsulation layer 400, the aforementioned multilayer structure of the encapsulation layer 400 can prevent or reduce the connection between these cracks and the first inorganic encapsulation layer 410 and the organic encapsulation layer 420, or between the organic encapsulation layer 420 and the second inorganic encapsulation layer 430. Therefore, the formation of external moisture or oxygen through its permeation display area DA can be prevented or significantly reduced.

[0139] In some implementations, other layers (e.g., capping layers) may be located between the first inorganic encapsulation layer 410 and the counter electrode 330.

[0140] A barrier layer 800 may be located on the encapsulation layer 400. The barrier layer 800 may include an organic material. If necessary, the barrier layer 800 may include a light-shielding material to serve as a light-shielding layer. For example, the light-shielding material may include at least one of black pigment, black dye, black particles, or metal particles.

[0141] In the retaining layer 800, the opening COP can be defined as an isolation wall. The opening COP can overlap with the first to third emission regions EA1, EA2 and EA3 respectively. The opening COP of the retaining layer 800 can include a first opening COP1, a second opening COP2 and a third opening COP3. That is, in the retaining layer 800, a first opening COP1 overlapping with the first emission region EA1, a second opening COP2 overlapping with the second emission region EA2 and a third opening COP3 overlapping with the third emission region EA3 can be defined.

[0142] Functional layer 500 may fill the open COP of the retaining layer 800. According to some embodiments, functional layer 500 may include at least one of quantum dots or scattering particles. According to some embodiments, functional layer 500 may 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 may be separated by the insulating walls of the retaining layer 800.

[0143] The first color conversion layer 510 may correspond to the first emission region EA1. The first color conversion layer 510 may overlap with the first emission region EA1. The first color conversion layer 510 may fill the first opening COP1 of the barrier layer 800. The first color conversion layer 510 may be arranged in the direction (e.g., the z-direction) of the light emitted from the first light-emitting diode LED1.

[0144] The first color conversion layer 510 can convert light in a first wavelength band generated from the emission layer 320 on the first pixel electrode 310R into light in a second wavelength band. According to some embodiments, the first color conversion layer 510 can convert blue light into red light. For example, when light with a wavelength of about 450 nm to about 495 nm is generated in the emission layer 320 on the first pixel electrode 310R, the first color conversion layer 510 can convert the generated light into light with a wavelength of about 630 nm to about 780 nm. Accordingly, in the first sub-pixel PX1, light with a wavelength of about 630 nm to about 780 nm can be emitted to the outside through the second substrate 700.

[0145] The second color conversion layer 520 may correspond to the second emission region EA2. The second color conversion layer 520 may overlap with the second emission region EA2. The second color conversion layer 520 may fill the second opening COP2 of the barrier layer 800. The second color conversion layer 520 may be arranged in the direction (e.g., the z-direction) of the light output from the second light-emitting diode LED2.

[0146] The second color conversion layer 520 can convert light in a first wavelength band generated from the emission layer 320 on the second pixel electrode 310G into light in a third wavelength band. For example, the second color conversion layer 520 can convert blue light into green light. For example, when light with a wavelength of about 450 nm to about 495 nm is generated in the emission layer 320 on the second pixel electrode 310G, the second color conversion layer 520 can convert the generated light into light with a wavelength of about 495 nm to about 570 nm. Accordingly, in the second sub-pixel PX2, light with a wavelength of about 495 nm to about 570 nm can be emitted to the outside through the second substrate 700.

[0147] The transmission layer 530 may correspond to the third emission region EA3. The transmission layer 530 may overlap with the third emission region EA3. The transmission layer 530 may fill the third opening COP3 of the barrier layer 800. The transmission layer 530 may be arranged in the direction (e.g., the z-direction) of the light emitted from the third light-emitting diode LED3.

[0148] The transmissive layer 530 can emit light generated from the emitting layer 320 on the third pixel electrode 310B to the outside without wavelength conversion. For example, the transmissive layer 530 can allow blue light to pass through without converting the color of the blue light. For example, when light with a wavelength of about 450 nm to about 495 nm is generated in the emitting layer 320 on the third pixel electrode 310B, the transmissive layer 530 can emit the light to the outside without wavelength conversion.

[0149] A first capping layer CL1 may be located on the functional layer 500 and the retaining layer 800. The first capping layer CL1 may be arranged above the functional layer 500. According to some embodiments, the first capping layer CL1 may be located between the functional layer 500 and the plurality of lenses 900, which will be described below.

[0150] The first capping layer CL1 protects the functional layer 500 and the retaining layer 800. The first capping layer CL1 prevents or reduces the penetration of impurities (e.g., moisture and / or air) from the outside and damages or contaminates the functional layer 500 and / or the retaining layer 800. The first capping layer CL1 may include inorganic materials. According to some embodiments, the first capping layer CL1 may be omitted if necessary.

[0151] According to some embodiments, only the first capping layer CL1 is shown directly on the barrier layer 800, but this is not a limitation. According to some embodiments, a light-shielding layer comprising a light-shielding material may be further provided between the barrier layer 800 and the first capping layer CL1. The light-shielding layer may be located on the barrier layer 800 and overlap with the barrier layer 800 in a direction perpendicular to the first substrate 100 (e.g., the z-direction). The light-shielding layer may be located on the barrier layer 800 and overlap with a portion of the functional layer 500, but may not overlap with other portions of the functional layer 500. The light-shielding layer may have openings that overlap with the functional layer 500. The openings of the light-shielding layer may overlap with a portion of the functional layer 500.

[0152] Multiple lenses 900 may be arranged throughout the functional layer 500. According to some embodiments, the multiple lenses 900 may be located on the first capping layer CL1. Multiple lenses 900 may be located between the functional layer 500 and the color panel 20. Multiple lenses 900 may be located between the functional layer 500 and the color filter layer 600. Multiple lenses 900 may be located between the functional layer 500 and the low refractive index layer LRL. Multiple lenses 900 may be located between the functional layer 500 and the filling layer 30. Multiple lenses 900 may be located between the first capping layer CL1 and the filling layer 30.

[0153] The plurality of lenses 900 may have a refractive index higher than that of the functional layer 500. The plurality of lenses 900 may have a refractive index higher than that of the first capping layer CL1. The refractive index of the plurality of lenses 900 may be in the range of, for example, from about 1.65 to about 2.0. The width of each of the plurality of lenses 900 may be in the range of, for example, from about 0.5 μm to about 10 μm. In this specification, the width of each of the plurality of lenses 900 may be defined as the maximum width of the lens.

[0154] Each of the plurality of lenses 900 may include a light-transmitting inorganic material and / or an organic material. For example, the organic material included in each of the plurality of lenses 900 may include a photocurable material. For example, the organic material included in each of the plurality of lenses 900 may include acrylate, epoxy, and / or epoxy acrylate. For example, each of the plurality of lenses 900 may include metal oxide particles or metal nitride particles (e.g., zinc oxide, titanium oxide, zirconium oxide, niobium oxide, tantalum oxide, tin oxide, nickel oxide, indium nitride, and / or gallium nitride).

[0155] exist Figure 5 and Figure 6 The image shows multiple lenses 900 having a hemispherical shape, but the shape is not limited to this and can be modified in various ways. For example, the shapes of the multiple lenses 900 could be as follows: Figure 7 The hemispherical shape shown in (a), such as Figure 7 The semi-cylindrical shape shown in (b), such as Figure 7 The truncated pyramid shape shown in (c) or as Figure 7 The truncated cone shape is shown in (d).

[0156] like Figure 5 and Figure 6 As shown, the plurality of lenses 900 may include a first lens 910 arranged to overlap with the functional layer 500 and a second lens 930 arranged to overlap with the isolation wall of the retaining layer 800. The first lens 910 and the second lens 930 may be formed in the same process operation and comprise the same material. Accordingly, the first lens 910 and the second lens 930 may have the same refractive index. The first lens 910 and the second lens 930 may be formed in the same process operation and arranged on the same layer.

[0157] Multiple first lenses 910 may be arranged in the region overlapping with the functional layer 500. Multiple first lenses 910 may be respectively arranged in the region overlapping with the opening COP of the barrier layer 800. Multiple first lenses 910 may be respectively provided in the regions overlapping with the first color conversion layer 510, the second color conversion layer 520, and the transmission layer 530. The first lenses 910 can change the path of light output from the functional layer 500 by overlapping with it, thereby improving light output efficiency. A group of first lenses 910 may be referred to as a light-collecting layer.

[0158] The second lens 930 may overlap with the isolation wall of the barrier layer 800. The second lens 930 may overlap with the barrier layer 800 between the first color conversion layer 510 and the second color conversion layer 520, the barrier layer 800 between the second color conversion layer 520 and the transmission layer 530, or the barrier layer 800 between the first color conversion layer 510 and the transmission layer 530.

[0159] The second lens 930 is arranged by overlapping the isolation wall of the retaining layer 800, and thus can be used as a spacer to maintain the gap between the light-emitting panel 10 and the color panel 20. In this specification, the second lens 930 may be referred to as a spacer.

[0160] According to one or more embodiments, by forming a plurality of lenses 900 that can be used as spacers in an existing spacer manufacturing operation, spacers and lenses that improve light output efficiency can be formed simultaneously without adding a separate mask, and therefore, the process is economically efficient.

[0161] The first lens 910 and the second lens 930 can have the same shape. For example, when the first lens 910 is hemispherical, the second lens 930 can also be hemispherical. For example, when the first lens 910 is semi-cylindrical, the second lens 930 can also be semi-cylindrical. Figure 6 As shown, the thickness T1 of the first lens 910 and the thickness T2 of the second lens 930 can 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 can be varied according to the embodiment. In this specification, the thickness can be defined as a vertical thickness according to the direction perpendicular to the first substrate 100 (e.g., the z-direction).

[0162] According to some embodiments, a pair of lenses 900 adjacent to each other among a plurality of lenses 900 may contact each other. A plurality of first lenses 910 overlapping an opening COP of the retaining layer 800 may be arranged to contact each other. For example, as... Figure 6 As shown, a plurality of first lenses 910 overlapping with the second color conversion layer 520 may be arranged to contact each other. According to some embodiments, the first lenses 910 and the second lens 930 may be arranged to contact each other. According to some embodiments, the distance between the centers of a pair of adjacent lenses 900 may be the same as the width of a single lens 900. In this case, the distance between a pair of adjacent lenses 900 may be in the range of about 0.5 μm to about 10 μm. However, the arrangement of the plurality of lenses 900 may be varied according to the embodiments.

[0163] According to some embodiments, a filler layer 30 may be formed to remove the air gap between the light-emitting panel 10 and the color panel 20. The filler layer 30 can be used as a buffer to resist external pressure, etc.

[0164] A filling layer 30 may be located on a plurality of lenses 900. The filling layer 30 may be arranged to cover the plurality of lenses 900. The filling layer 30 may be between the functional layer 500 and the color filter layer 600. According to some embodiments, the filling layer 30 may be between the functional layer 500 and the low refractive index layer LRL. The filling layer 30 may be between the plurality of lenses 900 and the color filter layer 600. According to some embodiments, the filling layer 30 may be between the plurality of lenses 900 and the low refractive index layer LRL. The filling layer 30 may be arranged to cover a first lens 910 and a second lens 930.

[0165] The filling layer 30 may have a lower refractive index than the refractive index of the plurality of lenses 900. That is, the plurality of lenses 900 may have a higher refractive index than the refractive index of the filling layer 30. The refractive index of the filling layer 30 may be in the range of, for example, about 1.3 to about 1.6. For example, the difference between the refractive index of the plurality of lenses 900 and the refractive index of the filling layer 30 may be in the range of about 0.1 to about 0.7. For example, the difference between the refractive index of the plurality of lenses 900 and the refractive index of the filling layer 30 may be in the range of about 0.2 to about 0.7. The difference between the refractive index of the first lens 910 and the refractive index of the filling layer 30 may be in the range of about 0.1 to about 0.7. The difference between the 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 to about 0.7. When the refractive index of the plurality of lenses 900 and the refractive index of the filling layer 30 differ by about 0.1 or more, it is evident that, as described with reference to Table 1 below, the light output efficiency is significantly improved.

[0166] According to some embodiments, the filler layer 30 may include a thermosetting material or a photocurable material. The filler layer 30 may include organic materials (e.g., methyl silicone, phenyl silicone, or polyimide). However, one or more embodiments are not limited thereto. The filler layer 30 may include organic sealants (e.g., urethane resins, epoxy resins, or acrylic resins) or inorganic sealants (e.g., silicone). The filler layer 30 may include, for example, hollow silica particles, non-hollow silica particles, nano-silicate particles, and / or pore-forming agent particles.

[0167] Table 1

[0168]

[0169] Table 1 shows the degree of improvement in light output efficiency of display devices including lenses with different refractive indices. In each of Experimental Examples 1 to 4, the degree of improvement in light output efficiency compared to a display device without lenses was measured. Furthermore, in Experimental Examples 1 to 4, the lens size and shape were the same, only the refractive index of the lenses differed. Referring to Table 1, it can be seen that the degree of improvement in light output efficiency increases with the increase of the refractive index difference between the lens and the filling layer. In Experimental Example 1, where the refractive index difference between the lens and the filling layer is 0.04, the degree of improvement in light output efficiency is 102%. In Experimental Example 2, where the refractive index difference between the lens and the filling layer is 0.14, the degree of improvement in light output efficiency is 108%. In Experimental Example 3, where the refractive index difference between the lens and the filling layer is 0.24, the degree of improvement in light output efficiency is 113%. In Experimental Example 4, where the refractive index difference between the lens and the filling layer is 0.34, the degree of improvement in light output efficiency is 119%.

[0170] As can be seen, unlike Experiment 1 where the refractive index difference between the lens and the filling layer is 0.04, resulting in a 102% improvement in light output efficiency, Experiment 2, Experiment 3, and Experiment 4, where the refractive index difference between the lens and the filling layer is 0.1 or greater, show an improvement in light output efficiency of 108% or greater. As mentioned above, when the refractive index difference between the lens and the filling layer is approximately 0.1 or greater, the light output efficiency is improved.

[0171] Return to reference Figure 5 The color panel 20 may include a second substrate 700 and a color filter layer 600. According to some embodiments, the color panel 20 may further include a low refractive index layer LRL.

[0172] Light emitted by the light-emitting panel 10 can become incident light on the color panel 20. For example, light emitted by each of the first to third light-emitting diodes LED1, LED2, and LED3 can travel as incident light to the color panel 20. When a portion of the incident light passes through the color panel 20, that portion of the incident light can be color-converted and emitted to the outside, while other portions of the incident light can pass through the color panel 20 without color conversion and be emitted to the outside.

[0173] Color panel 20 may include a central region CA that overlaps with a light-emitting diode. According to some embodiments, the central region CA may include a first central region CA1, a second central region CA2, and a third central region CA3. The first central region CA1 may overlap with a first light-emitting diode LED1 and a first emitting region EA1. The second central region CA2 may overlap with a second light-emitting diode LED2 and a second emitting region EA2. The third central region CA3 may overlap with a third light-emitting diode LED3 and a third emitting region EA3.

[0174] For example, when light emitted from the first light-emitting diode LED1 (e.g., blue light Lb) passes through the color panel 20, the light can be converted into red light Lr and emitted to the outside through the first central region CA1. When light emitted from the second light-emitting diode LED2 (e.g., blue light Lb) passes through the color panel 20, the light can be converted into green light Lg and emitted to the outside through the second central region CA2. When light emitted from the third light-emitting diode LED3 (e.g., blue light Lb) passes through the color panel 20, the light can be emitted to the outside through the third central region CA3 without color conversion. As described above, the color panel 20 may include a first central region CA1, a second central region CA2, and a third central region CA3 that overlap with the first to third light-emitting diodes LED1, LED2, and LED3 respectively and emit light of different colors. The first central region CA1, the second central region CA2, and the third central region CA3 of the color panel 20 may correspond to the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 of the display device 1, respectively. In this case, when an element corresponds to another element, it means that when viewed from a direction perpendicular to a surface of the second substrate 700 (e.g., the +z axis direction), the elements overlap each other.

[0175] The following section describes in detail the stacking structure of the color panel 20.

[0176] According to some embodiments, a second substrate 700 may be disposed on top of a first substrate 100, with light-emitting diodes between the second substrate 700 and the first substrate 100. The second substrate 700 may be referred to as an upper substrate or a light-transmitting substrate layer. The second substrate 700 may be located on a color filter layer 600.

[0177] The second substrate 700 may include glass or polymer resin. Where the second substrate 700 is flexible or bendable, the second substrate 700 may include polymer resin (e.g., polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, and cellulose acetate propionate).

[0178] The color filter layer 600 may be located on the second substrate 700. The color filter layer 600 may be located on the lower surface of the second substrate 700 in the direction from the second substrate 700 toward the first substrate 100 (e.g., the -z direction). That is, the color filter layer 600 may be disposed below the second substrate 700.

[0179] 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 arranged throughout a first central region CA1. The second color filter 620 may be arranged throughout a second central region CA2. The third color filter 630 may be arranged throughout a third central region CA3. The first color filter 610 may be positioned corresponding to a first emission region EA1. The second color filter 620 may be positioned corresponding to a second emission region EA2. The third color filter 630 may be positioned corresponding to a third emission region EA3. The first color filter 610 may overlap with a first color conversion layer 510. The second color filter 620 may overlap with a second color conversion layer 520. The third color filter 630 may overlap with a transmission layer 530.

[0180] Each of the first to third color filters 610, 620, and 630 may include a photosensitive resin. Furthermore, each of the first to third color filters 610, 620, and 630 may include a pigment or dye that displays a specific color.

[0181] The first color filter 610 may include a red color filter. For example, the first color filter 610 may allow light having wavelengths in the range of about 580 nm to about 780 nm to pass through. The first color filter 610 may include a red pigment or a red dye. The second color filter 620 may include a green color filter. For example, the second color filter 620 may allow light having wavelengths in the range of about 500 nm to about 580 nm to pass through. The second color filter 620 may include a green pigment or a green dye. The third color filter 630 may include a blue color filter. For example, the third color filter 630 may allow light having wavelengths in the range of about 380 nm to about 500 nm to pass through. The third color filter 630 may include a blue pigment or a blue dye.

[0182] The color filter layer 600 reduces the reflection of external light from the display device 1. For example, when external light reaches the first color filter 610, only light with the preset wavelength described above can pass through the first color filter 610, and light with other wavelengths can be absorbed by the first color filter 610. Accordingly, only light with the preset wavelength from the external light incident on the display device 1 can pass through the first color filter 610, and a portion of the passed light can be reflected at the counter electrode 330 and / or the first pixel electrode 310R below it and emitted back to the outside. Because only a portion of the external light incident at the location where the first sub-pixel PX1 is placed is reflected to the outside, the reflection of external light can be reduced. The above description can also be applied to the second color filter 620 and the third color filter 630.

[0183] 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 each other between one of the central regions CA and the other of the central regions CA.

[0184] For example, the first color filter 610, the second color filter 620, and the third color filter 630 may overlap each other between the first central region CA1 and the second central region CA2. In this case, the third color filter 630 may be located between the first central region CA1 and the second central region CA2. The first color filter 610 may extend from the first central region CA1 and overlap with the third color filter 630. The second color filter 620 may extend from the second central region CA2 and overlap with the third color filter 630.

[0185] For example, the first color filter 610, the second color filter 620, and the third color filter 630 may overlap each other between the second central region CA2 and the third central region CA3. The first color filter 610 may be located between the second central region CA2 and the third central region CA3. The second color filter 620 may extend from the second central region CA2 and overlap with the first color filter 610. The third color filter 630 may extend from the third central region CA3 and overlap with the first color filter 610.

[0186] For example, the first color filter 610, the second color filter 620, and the third color filter 630 may overlap each other between the third central region CA3 and the first central region CA1. The second color filter 620 may be located between the third central region CA3 and the first central region CA1. The third color filter 630 may extend from the third central region CA3 and overlap with the second color filter 620. The first color filter 610 may extend from the first central region CA1 and overlap with the second color filter 620.

[0187] As described above, the first color filter 610, the second color filter 620, and the third color filter 630 can overlap each other to define the light-shielding portion BM. According to some embodiments, the light-shielding portion BM can be formed by overlapping two filter materials selected from the first color filter 610, the second color filter 620, and the third color filter 630. Accordingly, the filter layer 600 can prevent or reduce color mixing without the need for separate light-shielding components.

[0188] According to some embodiments, the color panel 20 may further include an outer coating OC covering the color filter layer 600. The outer coating OC may be arranged to cover the color filter layer 600 and protect the color filter layer 600. The outer coating OC may include an organic material and provide a planarized surface.

[0189] The low refractive index layer (LRL) can be arranged to cover the color filter layer 600. The LLR can also be arranged integrally to cover the color filter layer 600. For example, the LLR can be integrally arranged to cover the first color filter 610, the second color filter 620, and the third color filter 630. The LLR can be located between the color filter layer 600 and the filler layer 30. The LLR can be arranged above the outer coating layer OC. The LLR can also be located between the outer coating layer OC and the filler layer 30.

[0190] The refractive index of the low-refractive-index layer LRL may be lower than that of the functional layer 500. The refractive index of the low-refractive-index layer LRL may be lower than that of the plurality of lenses 900. The low-refractive-index layer LRL may have a refractive index lower than that 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 be from about 1.1 to about 1.4. In some embodiments, the low-refractive-index layer LRL may be omitted.

[0191] The low refractive index layer (LRL) may include organic materials and particles dispersed within the organic materials. For example, the LLR may include, for instance, organic materials (such as acrylic resins, siloxane resins, urethane resins, or imide resins). The LLR may also include hollow silica particles, non-hollow silica particles, nano-silicate particles, magnesium fluoride (MgF2), iron oxide (Fe3O4), and / or pore-forming agent particles.

[0192] The low refractive index layer (LRL) can reflect a portion of the light emitted from the functional layer 500 to the second substrate 700 back towards the functional layer 500. That is, the low refractive index layer (LRL) recovers at least a portion of the light that passes through the functional layer 500 and is emitted towards the second substrate 700, and thus improves light utilization efficiency and the light efficiency of the display device 1.

[0193] A second capping layer CL2 may be disposed between the low refractive index layer LRL and the filler layer 30. The second capping layer CL2 protects the low refractive index layer LRL. A third capping layer CL3 may be disposed between the low refractive index layer LRL and the outer coating OC. The third capping layer CL3 protects the color filter layer 600 and the outer coating OC. Each of the second capping layer CL2 and the third capping layer CL3 prevents or reduces the penetration of impurities (e.g., moisture and / or air) from the outside and damages or contaminates the low refractive index layer LRL and the color filter layer 600. Each of the second capping layer CL2 and the third capping layer CL3 may comprise inorganic or organic materials.

[0194] Figure 8 According to some implementation methods Figure 5 A magnified view of area "A" of the display device. Figure 8 The reference is shown. Figure 5 and Figure 6 The description focuses on aspects of the implementation where the arrangement of the multiple lenses 900 is altered, and primarily describes the alterations.

[0195] refer to Figure 8 Multiple lenses 900 can be spaced apart from each other. That is, multiple lenses 900 can be non-contacting. This is consistent with a single opening COP in the retaining layer 800 (see...). Figure 5 The overlapping first lenses 910 can be spaced apart from each other. For example, as... Figure 8 As shown, the plurality of first lenses 910 overlapping the second color conversion layer 520 may be spaced apart from each other. According to some embodiments, the first lenses 910 and the second lenses 930 may be spaced apart from each other.

[0196] According to some embodiments, the distance between the centers of a pair of adjacent lenses 900 in a plurality of lenses 900 may be greater than the width of a single lens 900. That is, a pair of adjacent lenses 900 may be spaced apart by the spacing between adjacent pairs of lenses 900.

[0197] Figure 9 According to some implementation methods Figure 5 A magnified view of area "A" of the display device. Figure 9 The reference is shown. Figure 5 and Figure 6 The description focuses on aspects of the implementation where the arrangement of the multiple lenses 900 is altered, and primarily describes the alterations.

[0198] refer to Figure 9The thickness T3 of the first lens 910 and the thickness T4 of the second lens 930 can be different from each other. The thickness T3 of the first lens 910 can be less than the thickness T4 of the second lens 930. The first lens 910 and the second lens 930 with different thicknesses can be formed simultaneously by a halftone mask process. Even in this case, the first lens 910 and the second lens 930 can include the same material and have similar shapes.

[0199] exist Figure 9 In the embodiments shown, a plurality of lenses 900 in contact with each other are illustrated, but one or more embodiments are not limited thereto. For example, even when a plurality of lenses 900 are as described in the reference... Figure 8 When the lenses are spaced apart in the described embodiments, the thickness of the second lens 930 may also be greater than the thickness of the first lens 910.

[0200] Figure 10 This is a schematic plan view of the arrangement of multiple lenses according to some embodiments. Figure 10 This illustrates the functional layer 500 (see [reference]) when viewed from a direction perpendicular to the first substrate 100. Figure 5 The arrangement of multiple lenses 900.

[0201] refer to Figure 10 The plurality of lenses 900 can be arranged such that the dashed line VL1 connecting the centers of the plurality of lenses closest to one of the lenses 900 forms a square. That is, the number of lenses closest to each of the plurality of lenses 900 can be four. One of the plurality of lenses closest to one of the lenses 900 can be arranged in a first direction (e.g., ±y direction), and another of the plurality of lenses can be arranged in a second direction perpendicular to the first direction (e.g., ±x direction).

[0202] The distance between the plurality of lenses 900 may be closest in a first direction (e.g., ±y direction) and a second direction (e.g., ±x direction). According to some embodiments, the plurality of lenses 900 may be arranged to contact each other in the first direction (e.g., ±y direction) and may be arranged to contact each other in the second direction (e.g., ±x direction).

[0203] exist Figure 10 In one embodiment, multiple lenses 900 are shown in contact with each other, but one or more embodiments are not limited thereto. For example, even as in the reference Figure 8 In the described embodiments, when the plurality of lenses 900 are spaced apart from each other, the plurality of lenses 900 can also form as shown in the figure. Figure 10 The same arrangement shown in the figure.

[0204] Figure 11 This is a schematic plan view of the arrangement of multiple lenses according to some embodiments. Figure 11This illustrates the functional layer 500 (see [reference]) when viewed from a direction perpendicular to the first substrate 100. Figure 5 The arrangement of multiple lenses 900.

[0205] refer to Figure 11 The plurality of lenses 900 can be arranged such that the dashed line VL2 connecting the centers of the plurality of lenses closest to one of the lenses 900 forms a hexagon. That is, the number of lenses closest to each of the plurality of lenses 900 can be six. One of the plurality of lenses closest to one of the lenses 900 can be arranged in a first direction (e.g., ±y direction), another of the plurality of lenses can be arranged in a second direction perpendicular to the first direction (e.g., ±x direction), and yet another of the plurality of lenses can be arranged in a third direction that is a diagonal direction between the first and second directions.

[0206] The distance between the plurality of lenses 900 is closest in a first direction (e.g., ±y direction) and in a third direction as a diagonal direction. According to some embodiments, the plurality of lenses 900 may be arranged to contact each other in the first direction (e.g., ±y direction) and may be arranged to contact each other in a third direction as a diagonal direction.

[0207] exist Figure 11 In one embodiment, multiple lenses 900 in contact with each other are shown, but one or more embodiments are not limited thereto. For example, even as in the reference Figure 8 In the described embodiments, when the plurality of lenses 900 are spaced apart from each other, the plurality of lenses 900 can also form as shown in the figure. Figure 11 The same arrangement shown in the figure.

[0208] Figure 12 This is a schematic cross-sectional view of a display device 1 according to some embodiments. Figure 12 It shows the Figure 5 The implementation method has been modified, and details related to the reference have been omitted. Figures 5 to 7 The description is repetitive and mainly focuses on the changes.

[0209] refer to Figure 12 The display device 1 may include a circuit layer 200, 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, all stacked sequentially on the first substrate 100. According to some embodiments, a low refractive index layer LRL may be further provided between the filling layer 30 and the color filter layer 600.

[0210] exist Figure 12 In this embodiment, after the functional layer 500, a plurality of lenses 900, a filler layer 30, and a color filter layer 600 are sequentially formed on the encapsulation layer 400, a light-transmitting substrate layer 700a can be formed by directly applying and curing it onto 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 (e.g., acrylic resin).

[0211] Can be used as a reference Figures 8 to 11 The implementation methods described are applied in the same or similar manner. Figure 12 The structure in the implementation method.

[0212] As described above, this disclosure has been described with reference to one or more embodiments shown in the accompanying drawings, but should be considered in a descriptive sense only. Those skilled in the art will understand that various modifications and changes can be made to the embodiments. Therefore, the true scope of protection of this disclosure should be defined by the technical spirit of the appended claims.

Claims

1. A display device, comprising: A light-emitting panel includes a first substrate, a plurality of light-emitting diodes on the first substrate, a barrier layer including a plurality of openings, a functional layer in the openings of the barrier layer, and a plurality of lenses on the functional layer; A color panel, on the light-emitting panel, the color panel includes a second substrate and a color filter layer on the second substrate; as well as A filling layer, covering the plurality of lenses between the light-emitting panel and the color panel, the filling layer having a refractive index lower than that of the plurality of lenses. The plurality of lenses include a first lens that overlaps with the functional layer and a second lens that overlaps with the isolation wall of the embankment layer.

2. The display device according to claim 1, wherein the first lens and the second lens comprise the same material.

3. The display device according to claim 1, wherein the difference between the refractive index of the plurality of lenses and the refractive index of the filling layer is in the range of 0.1 to 0.

7.

4. The display device according to claim 1, wherein the refractive index of the plurality of lenses is in the range of 1.65 to 2.

5. The display device according to claim 1, wherein the refractive index of the filling layer is in the range of 1.3 to 1.

6.

6. The display device according to claim 1, wherein the thickness of the first lens is equal to the thickness of the second lens.

7. The display device according to claim 1, wherein the thickness of the first lens is less than the thickness of the second lens.

8. The display device according to claim 1, wherein the plurality of lenses are arranged such that a dashed line connecting the centers of the plurality of lenses closest to one of the plurality of lenses forms a square.

9. The display device according to claim 1, wherein the plurality of lenses are arranged such that the dashed line connecting the centers of the plurality of lenses closest to one of the plurality of lenses forms a hexagon.

10. The display device of claim 1, wherein the distance between the centers of a pair of lenses adjacent to each other in the plurality of lenses is equal to the width of each of the lenses.

11. The display device of claim 1, wherein the plurality of lenses are spaced apart from each other.

12. The display device according to claim 1, wherein the plurality of openings in the retaining layer includes a first opening, a second opening, and a third opening. The functional layer includes a first color conversion layer in the first opening of the embankment layer, a second color conversion layer in the second opening of the embankment layer, and a third color conversion layer in the third opening of the embankment 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. The first lens is provided as a plurality of first lenses in the regions that overlap with the first color conversion layer, the second color conversion layer and the third color conversion layer, respectively.

13. The display device according to claim 1, further comprising: A low-refractive-index layer is placed between the filler layer and the color filter layer, and the low-refractive-index layer has a lower refractive index than the functional layer.

14. A display device, comprising: substrate; Multiple light-emitting elements are on the substrate; An encapsulation layer covers the plurality of light-emitting elements; A retaining layer is present on the encapsulation layer and has multiple openings; Functional layers are located within the plurality of openings in the retaining layer; A light-gathering layer is located on the functional layer and overlaps with the functional layer; The spacer overlaps with the isolation wall of the embankment layer on the same layer as the light-collecting layer on the functional layer; A filling layer is applied to the light-collecting layer and the spacer. as well as Color filter layer, on the filler layer, The light-collecting layer has a higher refractive index than the filling layer.

15. The display device of claim 14, wherein the light-collecting layer and the spacer are made of the same material.

16. The display device according to claim 14, wherein the difference between the refractive index of the light-collecting layer and the refractive index of the filling layer is in the range of 0.1 to 0.

7.

17. The display device according to claim 14, wherein the thickness of the light-collecting layer is less than or equal to the thickness of the spacer.

18. The display device according to claim 14, further comprising: A low-refractive-index layer is placed between the filler layer and the color filter layer, and the low-refractive-index layer has a lower refractive index than the functional layer.

19. A display device, comprising: A light-emitting panel includes a first substrate, a plurality of light-emitting diodes on the first substrate, a barrier layer including a plurality of openings, a functional layer in the openings of the barrier layer, and a plurality of lenses on the functional layer; A color panel, on the light-emitting panel, the color panel includes a second substrate and a color filter layer on the second substrate; as well as A filler layer covers the plurality of lenses between the light-emitting panel and the color panel. The difference between the refractive index of the plurality of lenses and the refractive index of the filling layer is in the range of 0.1 to 0.

7.

20. The display device of claim 19, wherein the plurality of lenses have a refractive index higher than that of the functional layer, and The filling layer has a lower refractive index than the plurality of lenses.

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