Display device

Abstract

A display device is provided, including: a lower substrate; first to third light emitting devices arranged on the lower substrate; an upper substrate including a first emission region corresponding to the first light emitting device, a second emission region corresponding to the second light emitting device, a third emission region corresponding to the third light emitting device, and a non-emission region; a first insulating layer arranged on the upper substrate and having a first opening corresponding to the first emission region, a second opening corresponding to the second emission region, and a first auxiliary opening corresponding to the non-emission region and positioned in a first direction with respect to the first opening; and a second insulating layer arranged on the first insulating layer and having a first opening portion corresponding to the first opening and the first auxiliary opening.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0051827, filed on April 28, 2020, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] One or more embodiments relate to display devices, and more specifically, to display devices having improved reflective colors formed by external light. Background Technology

[0004] A display device is a device that visually displays data. Display devices can be used as displays for small products such as mobile phones, or as displays for large products such as televisions.

[0005] The display device includes multiple pixels that receive electrical signals and emit light to display an image to the outside. Each pixel includes a light-emitting device. For example, in the case of an organic light-emitting display device, each pixel includes an organic light-emitting diode (OLED) as a light-emitting device. Typically, organic light-emitting display devices operate using thin-film transistors and organic light-emitting diodes formed on a substrate, with the organic light-emitting diodes emitting light as a direct light source.

[0006] In recent years, the uses of display devices have become more diverse, and as a result, various suitable designs have been explored to improve the quality of display devices. Summary of the Invention

[0007] However, in existing display devices, when the display device is not driven, the color of the reflected light formed by external light on the display device changes to blue instead of black.

[0008] One or more embodiments relate to a display device having an improved color of reflected light formed by external light traveling after being reflected by the display device. However, this is merely an example, and the scope of this disclosure is not limited thereto.

[0009] Additional aspects will be set forth in part in the following description and will be apparent in part from the description or may be learned by practice of the presented embodiments.

[0010] According to one or more embodiments, a display device includes: a lower substrate; a first light-emitting device, a second light-emitting device, and a third light-emitting device disposed on the lower substrate; an upper substrate disposed facing the lower substrate and including a first emitting region corresponding to the first light-emitting device, a second emitting region corresponding to the second light-emitting device, a third emitting region corresponding to the third light-emitting device, and a non-emitting region, wherein the non-emitting region is the region of the upper substrate excluding the first to third emitting regions; a first insulating layer disposed on the upper substrate and having a first opening corresponding to the first emitting region, a second opening corresponding to the second emitting region, and a first auxiliary opening corresponding to the non-emitting region and positioned in a first direction relative to the first opening; a first color conversion layer disposed in the first opening and including a first quantum dot to convert incident light into light of a first color; a first auxiliary color conversion layer disposed in the first auxiliary opening and including a first quantum dot to convert incident light into light of the first color; and a second insulating layer disposed on the first insulating layer and having a first opening portion corresponding to the first opening and the first auxiliary opening.

[0011] According to an embodiment, the display device may further include a transmissive layer disposed in a second opening, wherein the second insulating layer may further have a second opening portion corresponding to the second opening and having an extension portion extending in a second direction and exposing at least a portion of the first insulating layer, the second direction being opposite to the first direction.

[0012] According to an embodiment, the display device may further include: a second color conversion layer arranged to correspond to a third emitting region and including second quantum dots to convert incident light into light of a second color; and a second auxiliary color conversion layer arranged to correspond to a non-emitting region and including second quantum dots to convert incident light into light of a second color, wherein the first insulating layer may further have a third opening and a second auxiliary opening, the third opening corresponding to the third emitting region and having a second color conversion layer therein, and the second auxiliary opening corresponding to the non-emitting region, the second auxiliary opening being positioned relative to the third opening in a first direction and having a second auxiliary color conversion layer therein, and the second insulating layer may further have a third opening portion corresponding to the third opening and the second auxiliary opening.

[0013] According to the implementation method, the size of the first opening and the size of the third opening can be smaller than the size of the second opening.

[0014] According to an embodiment, the second opening may be arranged between the first auxiliary opening and the second auxiliary opening.

[0015] According to the implementation method, the first color can be red, and the second color can be green.

[0016] According to an embodiment, the display device may further include: a first color filter layer between the upper substrate and the first color conversion layer; and a first auxiliary color filter layer between the upper substrate and the first auxiliary color conversion layer.

[0017] According to an embodiment, the surface of the first insulating layer exposed by the first opening may be hydrophobic.

[0018] According to the implementation, at least one of the first insulating layer and the second insulating layer can be black or blue.

[0019] According to the implementation method, on the plane, the first to third openings can each have a square shape.

[0020] According to the implementation, the extension lines connecting the center of one of the first to the third openings to the centers of the other two openings can intersect each other.

[0021] According to the implementation method, the first to third light-emitting devices can emit light that is a mixture of blue and green light.

[0022] According to one or more embodiments, a display device includes: a lower substrate; a first light-emitting device, a second light-emitting device, and a third light-emitting device disposed on the lower substrate; an upper substrate disposed facing the lower substrate and including a first emitting region corresponding to the first light-emitting device, a second emitting region corresponding to the second light-emitting device, a third emitting region corresponding to the third light-emitting device, and a non-emitting region, wherein the non-emitting region is the region of the upper substrate excluding the first to third emitting regions; a first insulating layer disposed on the upper substrate and having a first opening corresponding to the first emitting region and a second opening corresponding to the second emitting region; a first color conversion layer disposed in the first opening and including a first quantum dot to convert incident light into light of a first color; and a second insulating layer disposed on the first insulating layer and having a first opening portion corresponding to the first opening, wherein the first opening has a first auxiliary extension portion extending toward the non-emitting region along a first direction, and the first opening portion has a first extension portion extending toward the non-emitting region along the first direction.

[0023] According to an embodiment, the display device may further include a transmissive layer disposed in a second opening, wherein the second insulating layer may further have a second opening portion corresponding to the second opening and having a second extension portion extending in a second direction and exposing at least a portion of the first insulating layer, the second direction being opposite to the first direction.

[0024] According to the implementation method, the second opening may have a square shape on the plane.

[0025] According to an embodiment, the display device may further include: a second color conversion layer, arranged to correspond to the third emission region and including a second quantum dot to convert incident light into light of a second color, wherein the first insulating layer may further have a third opening, the third opening corresponding to the third emission region and having the second color conversion layer therein, the second insulating layer may further have a third opening portion corresponding to the third opening, and the third opening may have a second auxiliary extension portion extending along a first direction toward the non-emission region, and the third opening portion may have a third extension portion extending along the first direction toward the non-emission region.

[0026] According to an embodiment, the display device may further include: a first color filter layer between an upper substrate and a first color conversion layer; a second color filter layer between an upper substrate and a transmissive layer; and a third color filter layer between an upper substrate and a second color conversion layer.

[0027] According to an embodiment, the second opening may be arranged between the first auxiliary extension portion of the first opening and the second auxiliary extension portion of the third opening.

[0028] According to the implementation method, the first to third light-emitting devices can emit light that is a mixture of blue and green light.

[0029] According to the implementation method, the first opening may have an "L" shape on the plane.

[0030] Other aspects and features of this disclosure will become clearer from the accompanying drawings, claims, and detailed description. Attached Figure Description

[0031] The above and other aspects and features of certain embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0032] Figure 1 This is a schematic perspective view of the display device according to the embodiment;

[0033] Figure 2 This is a schematic cross-sectional view of the display device according to the embodiment;

[0034] Figure 3 This is an enlarged view of a portion of the display device according to an embodiment;

[0035] Figure 4 This is an enlarged view of a portion of the display device according to an embodiment;

[0036] Figure 5 This is a schematic plan view of the color filter unit according to the embodiment;

[0037] Figure 6This is a schematic cross-sectional view of the color filter unit according to the embodiment;

[0038] Figure 7A and Figure 7B Each is a schematic cross-sectional view of the first pixel in the color filter unit according to the embodiment;

[0039] Figure 8 This is a schematic cross-sectional view of the second pixel in the color filter unit according to the embodiment;

[0040] Figure 9 This is a schematic plan view of the color filter unit according to the embodiment;

[0041] Figure 10 This is a schematic cross-sectional view of the first pixel in the color filter unit according to the embodiment; and

[0042] Figure 11 This is a schematic cross-sectional view of a display device according to an embodiment. Detailed Implementation

[0043] Reference will now be made in more detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals always denote the same elements. In this respect, the embodiments may take different forms and should not be construed as limited to the description set forth herein. Therefore, the embodiments are described below only by reference to the accompanying drawings to explain aspects of this specification. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Throughout the disclosure, the expression “at least one of a, b, and c” means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

[0044] Various suitable modifications can be applied to this embodiment, and some embodiments will be shown in the accompanying drawings and described in the detailed description section. Aspects and features of this embodiment, as well as methods of implementing this embodiment, will become more apparent from the following description of the embodiments in conjunction with the accompanying drawings. However, this specification is not limited to the following embodiments, and they can be implemented in various suitable forms.

[0045] This embodiment will now be described more fully with reference to the accompanying drawings. When describing the embodiment with reference to the accompanying drawings, the same or corresponding elements are indicated by the same reference numerals, and redundant descriptions may be avoided.

[0046] It should be understood that although the terms “first,” “second,” etc., may be used in this document to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another.

[0047] As used in this article, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0048] It should be understood that, as used herein, the terms “comprises” and “comprising” specify the presence of the stated features and / or elements, but do not exclude the presence or addition of one or more other features and / or elements.

[0049] For ease of description, the dimensions of the elements in the accompanying drawings may be exaggerated. For example, the dimensions and thickness of the elements in the accompanying drawings may be exaggerated for ease of description, but this disclosure is not limited thereto.

[0050] When the implementation methods can be different, the process sequence can be performed in a different order than that described. For example, two consecutively described processes can be performed substantially simultaneously, or in the reverse order of their description.

[0051] In this specification, the expression "A and / or B" means only A, only B, or both A and B. The expression "at least one of A and B" means only A, only B, or both A and B.

[0052] In the following embodiments, when a layer, region, or element is referred to as being connected to another layer, region, or element, it may be directly connected to the other layer, region, or element, or indirectly connected to the other layer, region, or element via one or more intermediate layers, regions, or elements. For example, in this specification, when a layer, region, or element is referred to as being electrically connected to another layer, region, or element, it may be directly electrically connected to the other layer, region, or element, or indirectly electrically connected to the other layer, region, or element via one or more intermediate layers, regions, or elements.

[0053] The x-axis, y-axis, and z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis can be perpendicular to each other, or they can represent different directions that are not perpendicular to each other.

[0054] Figure 1 This is a schematic perspective view of the display device 1 according to the embodiment.

[0055] Reference Figure 1 The display device 1 may include a display area DA in which an image is to be displayed and a non-display area NDA in which an image will not be displayed (e.g., displayed). The display device 1 can provide an image to the outside by utilizing light emitted from the display area DA.

[0056] Figure 1The diagram shows a display device 1 with a rectangular display area DA, but this disclosure is not limited thereto. The shape of the display area DA can be any suitable shape, such as a circle, an ellipse, or a polygon, such as a triangle or a pentagon. Furthermore, although... Figure 1 A flat panel display device is shown, but the display device 1 can be implemented in various suitable forms, such as flexible, foldable and / or rollable display devices.

[0057] Although the organic light-emitting display device is described as an example of display device 1 according to an embodiment, this disclosure is not limited thereto. For example, in another embodiment, display device 1 may be an inorganic light-emitting display, an inorganic electroluminescent (EL) display, or a quantum dot light-emitting display. For example, the emitting layer of the display element disposed in display device 1 may include (e.g., is) an organic material, an inorganic material, a quantum dot, an organic material and a quantum dot, an inorganic material and a quantum dot, or an organic material, an inorganic material and a quantum dot.

[0058] Multiple pixels PX can be arranged in the display area DA. In the following, in this specification, pixel PX refers to a sub-pixel that emits light of a different color, and each pixel PX can be, for example, a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel.

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

[0060] Reference Figure 2 The display device 1 may include a display unit DU and a color filter unit CU arranged facing the display unit DU (e.g., arranged on, above, or overlapping the display unit DU). The display unit DU may include a first pixel PX1, a second pixel PX2, and a third pixel PX3 arranged on a lower substrate 100. The first pixel PX1 to the third pixel PX3 may be pixels that emit different colors of light on the lower substrate 100. For example, the first pixel PX1 may emit red light Lr, the second pixel PX2 may emit blue light Lb, and the third pixel PX3 may emit green light Lg.

[0061] The first pixel PX1 to the third pixel PX3 may each include a first light-emitting device OLED1, a second light-emitting device OLED2, and a third light-emitting device OLED3. Each of the first light-emitting devices OLED1 to the third light-emitting device OLED3 may include an organic light-emitting diode (OLED). In one embodiment, the first light-emitting devices OLED1 to the third light-emitting devices OLED3 may emit blue light Lb. In another embodiment, the first light-emitting devices OLED1 to the third light-emitting devices OLED3 may emit red light Lr, blue light Lb, and green light Lg, respectively. In yet another embodiment, the first light-emitting devices OLED1 to the third light-emitting devices OLED3 may emit light mixed with blue light Lb and green light Lg. This will... Figure 3 A more detailed description is provided below.

[0062] The color filter unit CU may include a first color filter 300a, a second color filter 300b, and a third color filter 300c. Light emitted from the first light-emitting device OLED1 to the third light-emitting device OLED3 can be emitted as red light Lr, blue light Lb, and green light Lg respectively through the first color filter 300a to the third color filter 300c. For example, light emitted from the first light-emitting device OLED1 to the third light-emitting device OLED3 that passes through the first color filter 300a to the third color filter 300c can be converted and / or filtered into red light Lr, blue light Lb, and green light Lg respectively.

[0063] The first color filter 300a to the third color filter 300c can be directly located on the upper substrate 200. The first color filter 300a to the third color filter 300c can each include, as will be described in more detail later, […]. Figure 3 and Figure 4 The first color conversion layer 220a, the first color filter layer 210a, the transmission layer 220b, the second color filter layer 210b, the second color conversion layer 220c, and the third color filter layer 210c are shown in the figure.

[0064] In this context, the phrase "directly located on the upper substrate 200" means that the first color filter layer 210a to the third color filter layer 210c (e.g., during the fabrication of the color filter unit CU) are directly formed on the upper substrate 200 to fabricate the color filter unit CU. Thereafter, the first color filter layer 210a to the third color filter layer 210c can be arranged to face the first pixel PX1 to the third pixel PX3 respectively, and thus, the display unit DU and the color filter unit CU can be combined with each other.

[0065] exist Figure 2 The image shows a display unit DU and a color filter unit CU bonded together by an adhesive layer ADH. The adhesive layer ADH can be, for example, an optically clear adhesive (OCA), but is not limited to this. In another embodiment, the adhesive layer ADH may be omitted.

[0066] Figure 3 This is an enlarged view of a portion of the display device 1 according to an embodiment.

[0067] Reference Figure 3 Display device 1 (see Figure 1 It may include multiple thin-film transistors (TFTs) (see...) Figure 11 The thin-film transistor array substrate 10 is provided, and the OLED substrate 20 can be disposed on the thin-film transistor array substrate 10. The OLED substrate 20 can be referred to as a light source OLED. The thin-film transistor TFTs of the thin-film transistor array substrate 10 can be devices for driving pixel (e.g., sub-pixel) regions of the OLED substrate 20. A color filter 300 can be disposed on the OLED substrate 20.

[0068] The OLED substrate 20 may include a plurality of pixel electrodes 310 (e.g., 310a, 310b, and 310c). Pixel electrodes 310a, 310b, and 310c may be elements patterned to correspond to respective sub-pixel regions. Each of the pixel electrodes 310a, 310b, and 310c may be electrically connected (e.g., connected) to each thin-film transistor TFT in the thin-film transistor array substrate 10 (e.g., electrically connected to a corresponding thin-film transistor TFT). A first blue emitting unit 320a, a second blue emitting unit 320b, a third blue emitting unit 320c, and a green emitting unit 320d may be sequentially stacked on the pixel electrodes 310a, 310b, and 310c. Although in Figure 3 The diagram shows a first blue emitting unit 320a, a second blue emitting unit 320b, a third blue emitting unit 320c, and a green emitting unit 320d stacked sequentially on pixel electrodes 310a, 310b, and 310c. However, the green emitting unit 320d can be arranged between the first blue emitting unit 320a and the second blue emitting unit 320b, or between the second blue emitting unit 320b and the third blue emitting unit 320c. As an example, the first blue emitting unit 320a, the second blue emitting unit 320b, the green emitting unit 320d, and the third blue emitting unit 320c can be stacked sequentially on pixel electrodes 310a, 310b, and 310c.

[0069] The first blue emitting unit 320a, the second blue emitting unit 320b, and the third blue emitting unit 320c may each include a blue emitting layer, which includes (e.g., is) a blue emitting material based on organic materials, and may also each include a hole transport layer (HTL) and / or an electron transport layer (ETL). The green emitting unit 320d may include a green emitting layer, which includes (e.g., is) a green emitting material based on organic materials, and may also include an HTL and / or an ETL.

[0070] The first charge generation layer 311 may be disposed between the first blue emitting unit 320a and the second blue emitting unit 320b. Furthermore, the second charge generation layer 312 may be disposed between the second blue emitting unit 320b and the third blue emitting unit 320c, and the third charge generation layer 313 may be disposed between the third blue emitting unit 320c and the green emitting unit 320d. For example, in some embodiments, the first blue emitting unit 320a, the second blue emitting unit 320b, the third blue emitting unit 320c, and the green emitting unit 320d are connected in series (e.g., connected) to form a series structure. The first charge generation layer 311, the second charge generation layer 312, and the third charge generation layer 313 may include (e.g., be) metal and / or metallic materials, and may increase the emission efficiency of the OLED substrate 20.

[0071] A counter electrode 330 may be disposed on the green emitting unit 320d. Here, although the counter electrode 330 is shown in an unpatterned form (e.g., continuous or monolithic), in some cases, the counter electrode 330 may be patterned as multiple electrode elements. For example, in some embodiments, the counter electrode 330 may be a common electrode corresponding to multiple sub-pixels, and in some embodiments, the counter electrode 330 may be disposed in multiple forms to correspond to individual sub-pixels. Furthermore, the first blue emitting unit 320a, the second blue emitting unit 320b, the third blue emitting unit 320c, and the green emitting unit 320d located between the pixel electrode 310 and the counter electrode 330, and the first charge generation layer 311 to the third charge generation layer 313 located between them, may have a structure patterned on a sub-pixel basis. A protective layer 340 may be further disposed on the counter electrode 330. The protective layer 340 may include (e.g.,) a transparent insulating material.

[0072] The first color conversion layer 220a, the transmission layer 220b, and the second color conversion layer 220c can be disposed on the protective layer 340. In addition, the first color filter layer 210a can be disposed on the first color conversion layer 220a, the second color filter layer 210b can be disposed on the transmission layer 220b, and the third color filter layer 210c can be disposed on the second color conversion layer 220c.

[0073] In an embodiment, the first color conversion layer 220a and the second color conversion layer 220c may include (for example,) quantum dot materials. The core of the quantum dots may be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, element IV, group IV compounds, and combinations thereof.

[0074] Group II-VI compounds can be selected from the group consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof. Ternary compounds are selected from AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, and HgSTe. The group consisting of CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; the quaternary compounds are selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0075] Group III-V compounds can be selected from the group consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof. Ternary compounds are selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, and mixtures thereof. Quaternary compounds are selected from the group consisting of GaAlNAs, GaAlNP, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof.

[0076] Group IV-VI compounds can be selected from groups consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from groups consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; ternary compounds are selected from groups consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; and quaternary compounds are selected from groups consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements can be selected from groups consisting of silicon (Si), germanium (Ge), and mixtures thereof. Group IV compounds can be binary compounds selected from groups consisting of SiC, SiGe, and mixtures thereof.

[0077] In this context, binary, ternary, or quaternary compounds can exist in particles (e.g., quantum dots) at a uniform concentration, or exist in the same particles (e.g., quantum dots) in locally distinct states where the concentration distribution is divided. Furthermore, quantum dots can have a core-shell structure where one quantum dot surrounds another. The interface between the core and shell can have a concentration gradient, where the concentration of elements present in the shell decreases towards the center of the quantum dot.

[0078] In some embodiments, quantum dots may have a core-shell structure comprising a core containing nanocrystals and a shell surrounding the core. The shell of the quantum dot can serve as a protective layer to maintain semiconductor properties by preventing or reducing chemical deformation 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. Examples of shells for quantum dots may include, for example, metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0079] For example, metal or nonmetal oxides can be exemplified as binary or ternary compounds, such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, etc., and ternary compounds such as MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, etc., but this disclosure is not limited thereto.

[0080] In addition, semiconductor compounds may be exemplified as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but this disclosure is not limited thereto.

[0081] Quantum dots can have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less (preferably about 40 nm or less, and more preferably about 30 nm or less). As used herein, the term nm may refer to an emission wavelength of 10 nm or less. -9 The distance is meters. Color purity and / or color reproducibility can be improved within this range. Furthermore, light emitted through quantum dots is emitted in all directions, and therefore, the optical field of view can be improved.

[0082] Furthermore, the form of quantum dots is not limited to the forms commonly used or available in the relevant fields. In some embodiments, quantum dots can take the form of spherical, pyramidal, multi-armed, or cubic nanoparticles, nanotubes, nanowires, nanofibers, or nanoplate-shaped particles.

[0083] Quantum dots can adjust the color of the emitted light according to their particle size, and therefore, quantum dots can have a variety of suitable emission colors, such as blue, red, green, etc.

[0084] The first color filter layer 210a can transmit only light with wavelengths from about 630 nm to about 780 nm, the second color filter layer 210b can transmit only light with wavelengths from about 450 nm to about 495 nm, and the third color filter layer 210c can transmit only light with wavelengths from about 495 nm to about 570 nm. For example, the first color filter layer 210a to the third color filter layer 210c can respectively include a red color filter, a blue color filter, and a green color filter. The light transmitted through the first color filter layer 210a to the third color filter layer 210c can respectively have improved red, blue, and green reproducibility. In addition, the first color filter layer 210a to the third color filter layer 210c can be used to reduce external light reflection in the display device 1.

[0085] Figure 4 This is an enlarged view of a portion of the display device 1 according to an embodiment.

[0086] Reference Figure 4 The first color conversion layer 220a can convert blue incident light Lib into light of a first color (e.g., red) (e.g., red light Lr). The first color conversion layer 220a may include (e.g., is) a first photosensitive polymer 223a in which first quantum dots 221a and first scattering particles 222a are dispersed.

[0087] The first quantum dot 221a can be excited by blue incident light Lib to isotropically emit light of a first color (e.g., red light Lr) with a wavelength longer than blue light. The first photosensitive polymer 223a may comprise (e.g., is) an organic material with light-transmitting properties. The first scattering particles 222a can scatter the blue incident light Lib that is not absorbed by the first quantum dot 221a to induce the excitation of more first quantum dots 221a, thereby increasing the color conversion efficiency of the first color conversion layer 220a. The first scattering particles 222a may comprise (e.g., is) titanium oxide (TiO2) and / or metal particles.

[0088] The transmissive layer 220b can transmit blue incident light Lib and emit blue incident light Lib in the direction of the upper substrate 200 (e.g., towards the upper substrate 200). The transmissive layer 220b may include (e.g., is) a second photosensitive polymer 223b in which second scattering particles 222b are dispersed. The second photosensitive polymer 223b may include (e.g., is) an organic material with light-transmitting properties, such as silicone resin and / or epoxy resin, and may include (e.g., is) the same material as the first photosensitive polymer 223a. The second scattering particles 222b can scatter and emit blue incident light Lib, and may include (e.g., is) the same material as the first scattering particles 222a.

[0089] The second color conversion layer 220c can convert blue incident light Lib into light of a second color (e.g., green) (e.g., green light Lg). The second color conversion layer 220c may include (e.g., is) a third photosensitive polymer 223c in which second quantum dots 221c and third scattering particles 222c are dispersed.

[0090] The second quantum dot 221c can be excited by blue incident light Lib to isotropically emit light of a second color (e.g., green light lg) with a wavelength longer than that of blue light. The third photosensitive polymer 223c may comprise (e.g., is) an organic material with light-transmitting properties and may comprise (e.g., is) the same material as the first photosensitive polymer 223a and the second photosensitive polymer 223b. The third scattering particle 222c can scatter the blue incident light Lib that is not absorbed by the second quantum dot 221c to induce the excitation of more second quantum dots 221c, thereby increasing the color conversion efficiency of the second color conversion layer 220c. The third scattering particle 222c may comprise (e.g., is) titanium oxide (TiO2) and / or metal particles and may comprise (e.g., is) the same material as the first scattering particle 222a and the second scattering particle 222b.

[0091] Figure 5 This is a schematic plan view of the color filter unit CU according to the embodiment. Figures 6 to 8This is a schematic cross-sectional view of the second pixel in the color filter unit CU according to the embodiment. Figure 6 Schematic illustration along Figure 5 The cross-section of the color filter unit CU intercepted by line I-I'. Figure 7A and Figure 7B Each schematically illustrates the path along the embodiment. Figure 5 The cross-section of the color filter unit CU is taken from line II-II', and Figure 8 Schematic illustration along Figure 5 The cross-section of the color filter unit CU, taken from line III-III'. Regarding... Figures 5 to 8 ,and Figure 3 and Figure 4 The same reference numerals in the figures refer to the same components, and therefore, repeated descriptions are not required.

[0092] Reference Figure 5 Display device 1 (see Figure 1 The first pixel PX1 to the third pixel PX3 can be used to emit light of different colors. The first pixel PX1 to the third pixel PX3 can respectively include a first light-emitting device OLED1, a second light-emitting device OLED2, and a third light-emitting device OLED3 (see [link to OLED documentation]). Figure 11 Each of the first pixel PX1 to the third pixel PX3 can emit, for example, red, blue, green, or white light through the OLED. The first pixel PX1 to the third pixel PX3 may include a first emitting region EA1, a second emitting region EA2, and a third emitting region EA3, which are areas where light generated by the first light-emitting device OLED1 to the third light-emitting device OLED3 is emitted to the outside. Non-emitting regions NEA are respectively arranged between the first emitting region EA1 and the second emitting region EA2, and between the second emitting region EA2 and the third emitting region EA3. In some embodiments, the non-emitting regions NEA surround each of the first emitting regions EA1 to the third emitting region EA3. Therefore, the first emitting regions EA1 to the third emitting regions EA3 can be distinguished by the non-emitting regions NEA. For example, the non-emitting regions NEA can separate the first emitting regions EA1 to the third emitting regions EA3 in a plan view. Figure 11 The non-emission area (NEA) is shown in more detail.

[0093] Because the display device 1 includes an upper substrate 200 (see...) Figure 6Therefore, the upper substrate 200 may include a first emission region EA1 corresponding to the first light-emitting device OLED1, a second emission region EA2 corresponding to the second light-emitting device OLED2, a third emission region EA3 corresponding to the third light-emitting device OLED3, and a non-emission region NEA that is the area of ​​the upper substrate 200 other than the first emission region EA1 to the third emission region EA3.

[0094] As mentioned above, in Figure 2 In the display device 1, a color filter unit CU may be disposed on the display unit DU. The color filter unit CU may include an upper substrate 200, a light-shielding layer 230, a first insulating layer 240, a second insulating layer 250, a first color filter layer 210a to a third color filter layer 210c, a first color conversion layer 220a, a transmission layer 220b, and a second color conversion layer 220c.

[0095] exist Figure 6 For ease of description, the diagram shows the layers stacked on the upper substrate 200 in the -z direction (negative z-axis direction), but as... Figure 11 As shown, the color filter unit CU according to this embodiment can be substantially coupled (e.g., attached) to the display unit DU, with the top and bottom reversed. Therefore, the stacking order on the above substrate 200 will be described below.

[0096] The display device according to this embodiment is assumed (for example, configured) to emit blue light or light mixed with blue and green light through an OLED, and therefore, the transmissive layer 220b can be arranged to correspond to the second color filter layer 210b.

[0097] The upper substrate 200 may include (e.g., is) glass, ceramic, metallic, and / or flexible and / or bendable materials. When the upper substrate 200 is flexible and / or bendable, it may include (e.g., is) polymeric resins such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, and / or cellulose acetate propionate. The upper substrate 200 may have a single-layer or multi-layer structure of the above materials. In the case of a multi-layer structure, the upper substrate 200 may also include an inorganic layer. In some embodiments, the upper substrate 200 may have an organic / inorganic / organic material structure. For example, the upper substrate 200 may have a stacked structure of organic material layers, inorganic material layers, and organic material layers.

[0098] The light-shielding layer 230 and the first color filter layer 210a to the third color filter layer 210c can be disposed on one surface of the upper substrate 200.

[0099] The light-shielding layer 230 may be arranged between the first color filter layer 210a and the second color filter layer 210b, and between the second color filter layer 210b and the third color filter layer 210c, corresponding to the non-emissive area (NEA). In some embodiments, the light-shielding layer 230 may surround each of the first color filter layers 210a to the third color filter layers 210c in a plan view to separate the first color filter layers 210a to the third color filter layers 210c in a plan view. For example, the light-shielding layer 230 may be a layer having openings in which the first color filter layers 210a to the third color filter layers 210c are arranged. The light-shielding layer 230, as a black matrix, may be a layer for improving color clarity and contrast. The light-shielding layer 230 may include (e.g., is) at least one of black pigment, black dye, and black particles. In some embodiments, the light-shielding layer 230 may include chromium (Cr), CrO x Cr / CrO x Cr / CrO x / CrN y Resins (e.g., carbon pigments, RGB hybrid pigments), graphite and / or non-Cr-based materials.

[0100] The first color filter layer 210a can transmit only (e.g., substantially only) light with wavelengths from about 630 nm to about 780 nm, the second color filter layer 210b can transmit only (e.g., substantially only) light with wavelengths from about 450 nm to about 495 nm, and the third color filter layer 210c can transmit only (e.g., substantially only) light with wavelengths from about 495 nm to about 570 nm. For example, the first color filter layer 210a to the third color filter layer 210c can respectively include (e.g., are) a red color filter, a blue color filter, and a green color filter. The light transmitted through the first color filter layer 210a to the third color filter layer 210c can respectively have improved red, green, and blue reproducibility.

[0101] The first insulating layer 240 may have a first opening 241a, a second opening 241b, and a third opening 241c respectively exposing the first color filter layer 210a to the third color filter layer 210c. The first insulating layer 240 may include (e.g., is) an organic material. In some cases, the first insulating layer 240 may include (e.g., is) a light-shielding material used as a light-shielding layer. The light-shielding material may include (e.g., is) at least one of black pigment, black dye, black particles, and metallic particles. For example, the first insulating layer 240 may be black. As another example, the first insulating layer 240 may be blue.

[0102] The first color conversion layer 220a, the transmission layer 220b, and the second color conversion layer 220c can be respectively arranged in the first opening 241a to the third opening 241c. The first color conversion layer 220a, the transmission layer 220b, and the second color conversion layer 220c can have the following characteristics: Figure 4 The structure shown.

[0103] The second insulating layer 250 may include a first opening 251a, a second opening 251b, and a third opening 251c that respectively expose the first color conversion layer 220a, the transmission layer 220b, and the second color conversion layer 220c. The second insulating layer 250 may include (e.g., is) an organic material. In some cases, the second insulating layer 250 may include (e.g., is) at least one of black pigment, black dye, black particles, and metal particles to serve as a light-shielding layer. For example, the second insulating layer 250 may be black. As another example, the second insulating layer 250 may be blue.

[0104] Return to reference Figure 5 The first pixel PX1 to the third pixel PX3 may each include a first color conversion layer 220a, a transmission layer 220b, and a second color conversion layer 220c. Furthermore, the first pixel PX1 to the third pixel PX3 may each include a first color filter layer 210a to a third color filter layer 210c (see...). Figure 5 (The dashed line in the middle).

[0105] like Figure 6 As shown, the first insulating layer 240 disposed on the upper substrate 200 may include a first opening 241a to a third opening 241c. The first opening 241a may correspond to a first emission region EA1 (e.g., may overlap with the first emission region EA1), the second opening 241b may correspond to a second emission region EA2 (e.g., may overlap with the second emission region EA2), and the third opening 241c may correspond to a third emission region EA3 (e.g., may overlap with the third emission region EA3). In embodiments, as... Figure 5 As shown, the dimensions of the first opening 241a and the third opening 241c can be smaller than the dimension of the second opening 241b. For example, the second opening 241b can have the largest dimension among the first opening 241a to the third opening 241c.

[0106] In the implementation method, such as Figure 5As shown, the first insulating layer 240 may further include a first auxiliary opening 241d and a second auxiliary opening 241e. In this case, the first auxiliary opening 241d may correspond to the non-emitting region NEA and may be positioned from the first opening 241a in a first direction (e.g., the -y direction (negative y-axis direction)). For example, the first auxiliary opening 241d may be spaced apart from the first opening 241a in the first direction and may overlap with a first portion of the non-emitting region NEA. Furthermore, the second auxiliary opening 241e may correspond to the non-emitting region NEA and may be positioned from the third opening 241c in the first direction. For example, the second auxiliary opening 241e may be spaced apart from the third opening 241c in the first direction and may overlap with a second portion of the non-emitting region NEA. In some embodiments, the first insulating layer 240 may surround the first auxiliary opening 241d and the second auxiliary opening 241e to separate the first auxiliary opening 241d and the second auxiliary opening 241e from the first opening 241a and the third opening 241c, respectively, in a plan view. In some embodiments, a second opening 241b corresponding to (e.g., overlapping with) the second emission region EA2 may be arranged between the first auxiliary opening 241d and the second auxiliary opening 241e. For example, the second opening 241b may be located between the first auxiliary opening 241d and the second auxiliary opening 241e along an x-axis direction perpendicular to (e.g., substantially perpendicular to) the first direction.

[0107] Refer to the schematic cross-sectional view of the first pixel PX1. Figure 7A The first color conversion layer 220a may be disposed in the first opening 241a formed in the first insulating layer 240, and the first auxiliary color conversion layer 220d may be disposed in the first auxiliary opening 241d formed in the first insulating layer 240. The first auxiliary color conversion layer 220d may have the same structure as the first color conversion layer 220a. For example, the first color conversion layer 220a and the first auxiliary color conversion layer 220d may include a first quantum dot 221a that converts incident light into light of a first color (see [link to documentation]). Figure 4 As an example, the first color could be red.

[0108] Although described based on the first pixel PX1, the third pixel PX3 can be applied in the same manner. The second color conversion layer 220c can be disposed in the third opening 241c formed in the first insulating layer 240, and the second auxiliary color conversion layer 220e can be disposed in the second auxiliary opening 241e formed in the first insulating layer 240. The second auxiliary color conversion layer 220e can have the same structure as the second color conversion layer 220c. For example, the second color conversion layer 220c and the second auxiliary color conversion layer 220e may include a second quantum dot 221c that converts incident light into light of a second color (see...). Figure 4 As an example, the second color could be green.

[0109] The first color filter layer 210a may be located between the upper substrate 200 and the first color conversion layer 220a, and the first auxiliary color filter layer 210d may be located between the upper substrate 200 and the first auxiliary color conversion layer 220d. In this case, the first color filter layer 210a and the first auxiliary color filter layer 210d may include a red color filter that transmits only light with a wavelength of about 630 nm to about 780 nm.

[0110] Although described based on the first pixel PX1, the third pixel PX3 can be applied in the same manner. The third color filter layer 210c can be located between the upper substrate 200 and the second color conversion layer 220c, and the second auxiliary color filter layer 210e can be located between the upper substrate 200 and the second auxiliary color conversion layer 220e. In this case, the third color filter layer 210c and the second auxiliary color filter layer 210e can comprise green color filters that transmit only light with wavelengths from about 495 nm to about 570 nm.

[0111] In addition, such as Figure 6 As shown, the second insulating layer 250 disposed on the first insulating layer 240 may include a first opening portion 251a to a third opening portion 251c. In this case, the first opening portion 251a may correspond to the first opening 241a and the first auxiliary opening 241d, the second opening portion 251b may correspond to the second opening 241b, and the third opening portion 251c may correspond to the third opening 241c and the second auxiliary opening 241e.

[0112] The first opening portion 251a and the third opening portion 251c may include a first extension portion 252a and a third extension portion 252c, which extend in a first direction and expose at least a portion of the first insulating layer 240, respectively. In some embodiments, the first extension portion 252a may extend in the first direction to expose the first auxiliary color conversion layer 220d, and the third extension portion 252c may extend in the first direction to expose the second auxiliary color conversion layer 220e. The second opening portion 251b may include a second extension portion 252b that extends in a second direction opposite to the first direction (e.g., the +y direction (positive y-axis direction)) and exposes at least a portion of the first insulating layer 240 (see [link to documentation]). Figure 8 In this embodiment, the widths of the first extension 252a to the third extension 252c may be the same (e.g., substantially the same). For example, the widths of the first extension 252a to the third extension 252c along the x-axis direction may be the same (e.g., substantially the same) (see [link to relevant documentation]). Figure 5 ).

[0113] As a comparative example, the insulating layer disposed on the upper substrate may only include openings corresponding to the emitting regions. For example, the color conversion layer and color filter layer are disposed on the upper substrate to correspond to the emitting regions, but the color conversion layer and color filter layer may not be disposed to correspond to the non-emitting regions. For example, the insulating layer may include openings corresponding to the emitting regions, but the openings may not include portions corresponding to the non-emitting regions. In this case, the color of the reflected light formed by the reflection of external light on the display device when the display device is not driven may become blue instead of black.

[0114] For example, light-emitting devices included in a display device can emit light in which blue and green light are mixed. The brightness of the light increases more significantly (e.g., more) when light in which blue and green light are mixed passes through the red conversion layer and red filter compared to when only blue light passes through them. Similarly, the brightness of the light increases more significantly (e.g., more) when light in which blue and green light are mixed passes through the green conversion layer and green filter compared to when only blue light passes through them. However, there is no difference in brightness when light in which blue and green light is mixed passes through the transmission layer and blue filter compared to when only blue light passes through them. For example, the efficiencies of red, green, and blue subpixels differ from each other. Therefore, the opening of the blue subpixel is enlarged to adjust the efficiency of the blue subpixel to be similar to that of the red and green subpixels. This process enlarges the opening of the blue subpixel (e.g., the planar area of ​​the opening), and when the display device is not driven, the color of the reflected light formed by external light on the display device is greatly affected by the blue subpixel with the largest opening, and thus can be blue instead of black.

[0115] However, the first insulating layer 240 included in the display device 1 according to the embodiments of the present disclosure may further include a first auxiliary opening 241d and a second auxiliary opening 241e. A first auxiliary color conversion layer 220d may be disposed in the first auxiliary opening 241d, and a second auxiliary color conversion layer 220e may be disposed in the second auxiliary opening 241e. Furthermore, a first auxiliary color filter layer 210d may be disposed between the upper substrate 200 and the first auxiliary color conversion layer 220d, and a second auxiliary color filter layer 210e may be disposed between the upper substrate 200 and the second auxiliary color conversion layer 220e. The first light-emitting device OLED1 to the third light-emitting device OLED3 included in the display device 1 according to the embodiments may emit light in which blue light and green light are mixed (see...). Figure 3In this case, the second opening 241b among the first opening 241a to the third opening 241c can have the largest size. Although the second opening 241b has the largest size, the first auxiliary color conversion layer 220d, the first auxiliary color filter layer 210d, the second auxiliary color conversion layer 220e, and the second auxiliary color filter layer 210e are arranged on the upper substrate 200, and therefore, when the display device 1 is not driven, the reflected color formed by external light on the display device 1 can become black without being biased towards blue. For example, the effects of the transmission layer 220b and the second color filter layer 210b corresponding to the second opening 241b with the largest size are canceled out by the first auxiliary color conversion layer 220d, the first auxiliary color filter layer 210d, the second auxiliary color conversion layer 220e, and the second auxiliary color filter layer 210e, and therefore, the reflected color can become black. For example, the planar areas of the first auxiliary color conversion layer 220d, the first auxiliary color filter layer 210d, the second auxiliary color conversion layer 220e, and the second auxiliary color filter layer 210e can be set such that the color of the external light reflected from the display device 1 is not biased towards red, green, or blue, or is biased towards red, green, or blue unevenly (e.g., such that the color of the external light reflected from the display device 1 is black).

[0116] In the implementation method, such as Figure 7B As shown, the surface 240' of the first insulating layer 240 exposed by the first opening 251a can have different properties than the first quantum dot 221a included in the first color conversion layer 220a. As an example, the surface 240' of the first insulating layer 240 can be hydrophobic. The hydrophobic surface 240' can be formed by a gas plasma process using a gas containing a halogen element (such as carbon tetrafluoride (CF4), sulfur hexafluoride (SF6), nitrogen trifluoride (NF3), etc.) or by fluorine coating. Because the surface 240' of the first insulating layer 240 exposed by the first opening 251a is hydrophobic, the first color conversion layer 220a can be easily formed only in the first opening 241a.

[0117] Return to reference Figure 5 On a plane, the first opening 241a to the third opening 241c can have a square shape. When the first opening 241a to the third opening 241c have a square shape, the amount of light that cannot be emitted from the two edge regions of the first opening 241a to the third opening 241c can be reduced compared to when the opening has a rectangular shape. Furthermore, even when the first opening 241a to the third opening 241c have a square shape, the first opening 241a to the third opening 241c can be formed to have the same area (e.g., planar area) as when the opening has a rectangular shape.

[0118] When the first opening 241a to the third opening 241c have a square shape, the extension lines connecting (e.g., connecting) the center of one of the first openings 241a to the third opening 241c to the centers of the other two can intersect each other. Figure 5 As shown, the first extension line l and the second extension line l' can intersect each other.

[0119] Figure 9 This is a schematic plan view of the color filter unit CU according to the embodiment. Figure 10 This is a schematic cross-sectional view of the first pixel PX1 in the color filter unit according to the embodiment. Figure 10 Schematic illustration along Figure 9 The cross-section of the color filter unit CU intercepted by line IV-IV'. Regarding Figure 9 and Figure 10 ,and Figures 3 to 6 The same reference numerals in the figures refer to the same components, and therefore, repeated descriptions are not required.

[0120] Reference Figure 9 Display device 1 (see Figure 1 The first pixel PX1 to the third pixel PX3 may emit light of different colors. The first pixel PX1 to the third pixel PX3 may each include a first light-emitting device OLED1 to a third light-emitting device OLED3, such as an OLED (see [link to OLED model]). Figure 11 Each of the first pixel PX1 to the third pixel PX3 can emit, for example, red, blue, green, or white light through the OLED. The first pixel PX1 to the third pixel PX3 can each include a first emitting region EA1 to a third emitting region EA3, which are areas through which light generated by the first light-emitting device OLED1 to the third light-emitting device OLED3 is emitted to the outside. Non-emitting regions NEA are respectively arranged between the first emitting region EA1 and the second emitting region EA2, and between the second emitting region EA2 and the third emitting region EA3, and therefore, the first emitting regions EA1 to the third emitting region EA3 can be distinguished by the non-emitting regions NEA (e.g., separated or spaced apart in a planar view). Figure 11 The non-emission area (NEA) is shown in more detail.

[0121] In the implementation method, such as Figure 9 and Figure 10As shown, the first insulating layer 240 disposed on the upper substrate 200 may include a first opening 241a corresponding to the first emitting region EA1. In this case, the first opening 241a may include a first auxiliary extension portion 242a extending along a first direction (e.g., the -y direction (negative y-axis direction)) toward the non-emitting region NEA. A first color conversion layer 220a may be disposed in the first opening 241a. A first color filter layer 210a may be disposed between the upper substrate 200 and the first color conversion layer 220a.

[0122] Furthermore, the second insulating layer 250 disposed on the first insulating layer 240 may include a first opening portion 251a corresponding to the first opening 241a. The first opening portion 251a may include a first extension portion 252a extending along a first direction toward the non-emission region NEA. Figure 10 In this context, the surface of the first insulating layer 240 exposed by the first opening portion 251a may have the following characteristics: Figure 7B The hydrophobicity described.

[0123] Although described based on the first pixel PX1, the third pixel PX3 can be applied in the same manner. The first insulating layer 240 disposed on the upper substrate 200 may include a third opening 241c corresponding to the third emitting region EA3. In this case, the third opening 241c may include a second auxiliary extension portion 242c extending along a first direction toward the non-emitting region NEA. The second color conversion layer 220c may be disposed in the third opening 241c. The third color filter layer 210c may be located between the upper substrate 200 and the second color conversion layer 220c. Furthermore, the second insulating layer 250 disposed on the first insulating layer 240 may include a third opening portion 251c corresponding to the third opening 241c. The third opening portion 251c may include a third extension portion 252c extending along a first direction toward the non-emitting region NEA.

[0124] The second pixel PX2 may be different from the first pixel PX1 and the third pixel PX3. For example, the first insulating layer 240 disposed on the upper substrate 200 may include a second opening 241b corresponding to the second emission region EA2, but the second opening 241b may not include auxiliary extensions as in the first opening 241a and the third opening 241c. The transmission layer 220b may be disposed in the second opening 241b, and the second color filter layer 210b may be between the upper substrate 200 and the transmission layer 220b. Furthermore, the second insulating layer 250 disposed on the first insulating layer 240 may include a second opening portion 251b corresponding to the second opening 241b. The second opening portion 251b may include a second extension portion 252b extending toward the non-emission region NEA along a second direction opposite to the first direction (e.g., the +y direction (positive y-axis direction)). For example, the second opening portion 251b may include a second extension portion 252b extending in the second direction and exposing at least a portion of the first insulating layer 240.

[0125] Return to reference Figure 9 The second opening 241b can be arranged between the first auxiliary extension portion 242a of the first opening 241a and the second auxiliary extension portion 242c of the third opening 241c.

[0126] Furthermore, on the plane, the first opening 241a can have an "L" shape, and the second opening 241b can have a square shape. Additionally, the third opening 241c can have a shape in which the shape of the first opening 241a is based on an inverted y-axis. For example, the shape of the third opening 241c can be reflectively symmetrical with respect to an imaginary line extending along the y-axis through the second opening 241b (e.g., through the center of the second opening 241b). When the second opening 241b has a square shape, the amount of light that cannot be emitted from the two edge regions of the second opening 241b can be reduced compared to when the opening has a rectangular shape.

[0127] The first insulating layer 240 included in the display device 1 according to the embodiment may include a first opening 241a and a third opening 241c, and the first opening 241a and the third opening 241c may respectively include a first auxiliary extension portion 242a and a second auxiliary extension portion 242c. A first color conversion layer 220a may be disposed in the first auxiliary extension portion 242a, and a second color conversion layer 220c may be disposed in the second auxiliary extension portion 242c. Furthermore, a first color filter layer 210a may be disposed between the upper substrate 200 and the first color conversion layer 220a, and a third color filter layer 210c may be disposed between the upper substrate 200 and the second color conversion layer 220c. The first light-emitting device OLED1 to the third light-emitting device OLED3 included in the display device 1 according to the embodiment can emit light mixed with blue and green light (see...). Figure 3 In this case, the second emission region EA2 among the first emission regions EA1 to the third emission regions EA3 can have the largest size. Although the second emission region EA2 has the largest size, the first insulating layer 240 includes a first auxiliary extension portion 242a and a second auxiliary extension portion 242c. A first color conversion layer 220a is arranged in the first auxiliary extension portion 242a, and a second color conversion layer 220c is arranged in the second auxiliary extension portion 242c. Therefore, when the display device 1 is not driven, the color of the reflected light formed by the reflected external light traveling after being reflected by the display device 1 can become black. For example, the effects of the transmissive layer 220b and the second color filter layer 210b arranged to correspond to the second pixel PX2 having the largest emission area are canceled out by the first auxiliary extension portion 242a arranged extending from the first opening 241a and the second auxiliary extension portion 242c arranged extending from the third opening 241c. Therefore, the reflected color on the display device 1 can become black without being biased towards blue. For example, the planar area of ​​the portion of the first color conversion layer 220a, the first color filter layer 210a, the second color conversion layer 220c, and the third color filter layer 210c corresponding to the non-emissive region NEA can be set such that the color of the external light reflected from the display device 1 is not biased towards red, green, or blue, or is biased towards red, green, or blue unevenly (e.g., such that the color of the external light reflected from the display device 1 is black).

[0128] Figure 11 This is a schematic cross-sectional view of the display device 1 according to the embodiment. Regarding... Figure 11 ,and Figures 3 to 6 The same reference numerals in the figures refer to the same components, and therefore, repeated descriptions are not required.

[0129] The display area DA of the display device 1 according to this embodiment may include first pixels PX1 to third pixels PX3. This is merely an example, and the display device 1 may include more pixels.

[0130] First pixels PX1 to third pixels PX3 may each include a first emitting region EA1 to a third emitting region EA3. The first emitting region EA1 to the third emitting region EA3 may be regions from which light is generated and emitted to the outside. A non-emitting region NEA is arranged between the first emitting region EA1 and the second emitting region EA2, and between the second emitting region EA2 and the third emitting region EA3; therefore, the first emitting region EA1 to the third emitting region EA3 can be distinguished by the non-emitting region NEA (e.g., separated or spaced apart in a planar view).

[0131] The first pixel PX1 to the third pixel PX3 can emit (e.g., emit) different colors of light. For example, the first pixel PX1 can emit red light, the second pixel PX2 can emit blue light, and the third pixel PX3 can emit green light. In a planar diagram, the first emitting region EA1 to the third emitting region EA3 can have various suitable shapes, such as various suitable polygonal or circular shapes, and can also have various suitable arrangements, such as striped arrangements, pentile arrangements, etc.

[0132] The display device 1 according to this embodiment may include a first color conversion layer 220a, a transmissive layer 220b, and a second color conversion layer 220c to correspond to the first emission region EA1 to the third emission region EA3, respectively. The first color conversion layer 220a, the transmissive layer 220b, and the second color conversion layer 220c may include quantum dots and / or metal nanoparticles.

[0133] For example, the first pixel PX1 may include a first color conversion layer 220a, the second pixel PX2 may include a transmissive layer 220b, and the third pixel PX3 may include a second color conversion layer 220c. In this embodiment, the quantum dots included in the first color conversion layer 220a and the second color conversion layer 220c may have different average sizes.

[0134] In the following text, it will be based on Figure 11 The stacking order shown is used to describe the display device according to the embodiment in more detail.

[0135] The lower substrate 100 may include (e.g., is) glass, ceramic, metallic, and / or flexible and / or bendable materials. When the lower substrate 100 is flexible and / or bendable, it may include (e.g., is) polymeric resins such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, and / or cellulose acetate propionate. The lower substrate 100 may have a single-layer or multi-layer structure of the above materials, and in the case of a multi-layer structure, it may further include an inorganic layer. In embodiments, the lower substrate 100 may have an organic / inorganic / organic material structure.

[0136] A barrier layer may also be included between the lower substrate 100 and the first buffer layer 111. The barrier layer can prevent, minimize, or block impurities from penetrating from the lower substrate 100, etc., into the semiconductor layer A. The barrier layer may include (e.g., is) inorganic materials, organic materials, and / or organic-inorganic composite materials such as oxides and / or nitrides, and may have a single-layer or multi-layer structure of inorganic and organic materials.

[0137] The bias electrode BSM can be arranged on the first buffer layer 111 to correspond to the thin-film transistor (TFT). A voltage can be applied to the bias electrode BSM. Furthermore, the bias electrode BSM can prevent or block external light from reaching the semiconductor layer A. Therefore, the characteristics of the thin-film transistor (TFT) can be stabilized. In some cases, the bias electrode BSM can be omitted.

[0138] Semiconductor layer A may be disposed on the second buffer layer 112. Semiconductor layer A may include (e.g.,) amorphous silicon and / or polycrystalline silicon. In another embodiment, semiconductor layer A may include (e.g.,) 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, semiconductor layer A, as a Zn oxide-based material, may include (e.g.,) Zn oxide, In-Zn oxide, Ga-In-Zn oxide, etc. In another embodiment, semiconductor layer A may include (e.g.,) In-Ga-Zn-O (IGZO), In-Sn-Zn-O (ITZO), and / or In-Ga-Sn-Zn-O (IGTZO) semiconductors, wherein metals such as In, Ga, and Sn are contained in ZnO. Semiconductor layer A may include a channel region and source and drain regions disposed on both sides of the channel region. Semiconductor layer A may be a single layer or multiple layers.

[0139] The gate electrode G can be arranged on the semiconductor layer A to at least partially overlap with the semiconductor layer A, and a gate insulating layer 113 is present between them. The gate electrode G can include (e.g., is) molybdenum (Mo), Al, copper (Cu), Ti, etc., and can include a single-layer or multi-layer structure. As an example, the gate electrode G can include (e.g., is) a single layer of Mo. The first electrode CE1 of the storage capacitor Cst can be arranged on the same layer as the gate electrode G. The first electrode CE1 can include (e.g., is) the same material as the gate electrode G.

[0140] Despite Figure 11 The diagram shows that the gate electrode G 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 thin-film transistor TFT, and the gate electrode G of the thin-film transistor TFT can be used as the first electrode CE1 of the storage capacitor Cst.

[0141] The interlayer insulating layer 115 can be configured to cover the first electrode CE1 of the gate electrode G and the storage capacitor Cst. The interlayer insulating layer 115 may include (for example, silicon oxide (SiO2) or silicon nitride (SiN2). x ), silicon oxynitride (SiON), aluminum oxide (Al2O3), titanium oxide (TiO2), tantalum oxide (Ta2O5), hafnium oxide (HfO2) and / or zinc oxide (ZnO2).

[0142] The second electrode CE2 of the storage capacitor Cst, as well as the source electrode S and drain electrode D of the thin-film transistor TFT, can be arranged on the interlayer insulating layer 115.

[0143] The second electrode CE2 of the storage capacitor Cst and the source electrode S and drain electrode D of the thin-film transistor TFT may include (e.g., are) conductive materials, such as Mo, Al, Cu, Ti, etc., and may include single-layer or multi-layer structures, including (e.g., are) the aforementioned materials. As an example, the second electrode CE2, source electrode S, and drain electrode D may have a Ti / Al / Ti multi-layer structure. The source electrode S and drain electrode D can be connected (e.g., connected) to the source or drain region of the semiconductor layer A through contact holes. For example, the source electrode S and drain electrode D can be connected to the source and drain regions of the semiconductor layer A respectively through their respective contact holes.

[0144] The second electrode CE2 of the storage capacitor Cst can overlap with the first electrode CE1, and the interlayer insulating layer 115 is located between the first electrode CE1 and the second electrode CE2, and can form a capacitor. In this case, the interlayer insulating layer 115 can be used as the dielectric layer of the storage capacitor Cst.

[0145] The planarization layer 118 can be disposed on the second electrode CE2, the source electrode S and the drain electrode D, and the first light-emitting device OLED1 to the third light-emitting device OLED3 can be disposed on the planarization layer 118.

[0146] Planarization layer 118 may comprise a single-layer or multi-layer structure having an organic material layer and may provide a flat upper surface. Planarization layer 118 may comprise (e.g., is) a general-purpose polymer and / or a polymer derivative having phenolic groups. General-purpose polymers include, for example, benzocyclobutene (BCB), polyimide, hexamethyldisiloxane (HMDSO), polymethyl methacrylate (PMMA), and / or polystyrene (PS). Polymer derivatives having phenolic groups include, for example, acryloyl polymers, imide polymers, aryl ether polymers, amide polymers, fluoropolymers, p-xylyl polymers, vinyl alcohol polymers, or mixtures thereof.

[0147] In the display area DA of the lower substrate 100, first light-emitting devices OLED1 to third light-emitting devices OLED3 can be disposed on the planarization layer 118. The first light-emitting devices OLED1 to third light-emitting devices OLED3 can each include a first pixel electrode 310a, a second pixel electrode 310b, and a third pixel electrode 310c, and can commonly include an intermediate layer 320 and a counter electrode 330. The intermediate layer 320 may include an organic emitting layer. Furthermore, as... Figure 3 As shown, the first blue emitting unit 320a, the second blue emitting unit 320b, the third blue emitting unit 320c, and the green emitting unit 320d can be sequentially stacked on the first pixel electrode 310a to the third pixel electrode 310c. Therefore, the first light-emitting device OLED1 to the third light-emitting device OLED3 can emit light that is a mixture of blue and green light.

[0148] The first pixel electrode 310a to the third pixel electrode 310c may include a (semi-)transmissive electrode or a reflective electrode. In some embodiments, the first pixel electrode 310a to the third pixel electrode 310c may include (e.g., is) a transmissive electrode, a semi-transmissive electrode, or a reflective electrode. In some embodiments, the first pixel electrode 310a to the third pixel electrode 310c may each include a reflective layer and a transparent or semi-transparent electrode layer formed on the reflective layer. The reflective layer may include (e.g., is) silver (Ag), magnesium (Mg), Al, platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), Cr, or compounds thereof. The transparent or semi-transparent electrode layer may include (e.g., is) at least one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), and aluminum zinc oxide (AZO). In some embodiments, the first pixel electrode 310a to the third pixel electrode 310c may each include (for example,) ITO / Ag / ITO (for example, an ITO / Ag / ITO stack).

[0149] Pixel defining layer 119 may be disposed on planarization layer 118. Furthermore, pixel defining layer 119 may increase the distance between the edges of the first pixel electrodes 310a to the third pixel electrodes 310c and the opposing electrodes 330 on the first pixel electrodes 310a to the third pixel electrodes 310c, thereby preventing or suppressing arcing or the like at the edges of the first pixel electrodes 310a to the third pixel electrodes 310c. For example, pixel defining layer 119 may cover the side portion of each of the first pixel electrodes 310a to the third pixel electrodes 310c and may have an opening overlapping the central portion of each of the first pixel electrodes 310a to the third pixel electrodes 310c. In some embodiments, the opening of pixel defining layer 119 may correspond to (e.g., define) the first emission region EA1 to the third emission region EA3, but this disclosure is not limited thereto.

[0150] The pixel defining layer 119 may include (for example) at least one organic insulating material selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene and phenolic resin, and may be formed by spin coating or the like.

[0151] The intermediate layer 320 of the first light-emitting device OLED1 to the third light-emitting device OLED3 may include an organic emitting layer. The organic emitting layer may include (e.g., is) an organic material that emits red, green, blue, or white light, and the organic material includes (e.g., is) a fluorescent and / or phosphorescent material. The organic emitting layer may include (e.g., is) a low molecular weight organic material and / or a polymeric organic material. Functional layers such as HTL, hole injection layer (HIL), ETL, and / or electron injection layer (EIL) may be selectively further arranged above and below the organic emitting layer. For example, HIL, HTL, organic emitting layer, ETL, and EIL may be stacked in this order, but this disclosure is not limited thereto.

[0152] Despite Figure 11 The diagram shows an intermediate layer 320 formed as a body over the first pixel electrode 310a to the third pixel electrode 310c, but this disclosure is not limited thereto. The intermediate layer 320 can be modified differently and appropriately. For example, the intermediate layer 320 can be arranged to correspond to the first pixel electrode 310a to the third pixel electrode 310c respectively.

[0153] In this embodiment, all three light-emitting devices, from OLED1 to OLED3, may include an organic emitting layer that emits light of the same color. For example, all three may emit blue light. As another example, all three may emit light in which a mixture of blue and green light is emitted.

[0154] The relative electrode 330 may include a transmissive electrode or a reflective electrode. In some embodiments, the relative electrode 330 may include a transparent or translucent electrode and may include a metal thin film having a small work function and comprising (e.g., lithium (Li), calcium (Ca), LiF, Al, Ag, Mg, or compounds thereof). Furthermore, a transparent conductive oxide (TCO) layer such as ITO, IZO, ZnO, or In2O3 may be further disposed on the metal thin film. The relative electrode 330 may be disposed over the display area DA and the non-display area NDA, and may be disposed over the intermediate layer 320 and the pixel defining layer 119. The relative electrode 330 may be formed as a body over the first light-emitting device OLED1 to the third light-emitting device OLED3 to correspond to the first pixel electrode 310a to the third pixel electrode 310c.

[0155] Spacers 119S may also be disposed on the pixel defining layer 119 to prevent or suppress mask recesses. Spacers 119S may be integrally formed with the pixel defining layer 119. For example, spacers 119S and pixel defining layer 119 may be formed in parallel or simultaneously in the same process utilizing halftone masking.

[0156] Because the first light-emitting device OLED1 to the third light-emitting device OLED3 may be easily damaged by external moisture and / or oxygen, the thin-film encapsulation layer 400 can cover and protect the first light-emitting device OLED1 to the third light-emitting device OLED3. The thin-film encapsulation layer 400 can cover the display area DA and extend to the outside of the display area DA. The thin-film encapsulation layer 400 may include at least one organic encapsulation layer and at least one inorganic encapsulation layer. For example, the thin-film encapsulation layer 400 may include a first inorganic encapsulation layer 410, an organic encapsulation layer 420, and a second inorganic encapsulation layer 430.

[0157] The first inorganic encapsulation layer 410 may cover the opposing electrode 330 and may include (e.g., silicon oxide, silicon nitride, and / or silicon oxynitride). Other layers, such as capping layers, may be disposed between the first inorganic encapsulation layer 410 and the opposing electrode 330. Because the first inorganic encapsulation layer 410 is formed along the underlying structure, the upper surface of the first inorganic encapsulation layer 410 may be non-planar. 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 planar.

[0158] Even when cracks occur in the thin-film encapsulation layer 400, the aforementioned multilayer structure of the thin-film encapsulation layer 400 can prevent or reduce the occurrence of these cracks connecting (e.g., bonding) between the first inorganic encapsulation layer 410 and the organic encapsulation layer 420 or between the organic encapsulation layer 420 and the second inorganic encapsulation layer 430. Therefore, channels for external moisture and / or oxygen to permeate into the display area DA can be prevented, minimized, or reduced.

[0159] The upper substrate 200 may be located above the lower substrate 100, and the opposite electrode 330 may be located between the upper substrate 200 and the lower substrate 100. The upper substrate 200 may include (e.g.) glass, metal and / or polymer resin.

[0160] A light-shielding layer 230, a first insulating layer 240, and a second insulating layer 250 are sequentially disposed on the lower surface of the upper substrate 200 in the direction of the lower substrate 100 (e.g., in the direction toward the lower substrate 100). The light-shielding layer 230 may include openings corresponding to the first emission regions EA1 to the third emission regions EA3, respectively. First color filter layers 210a to third color filter layers 210c may be disposed in the openings, respectively. Furthermore, the first insulating layer 240 may include first openings 241a to third openings 241c corresponding to the first emission regions EA1 to the third emission regions EA3, respectively. A first color conversion layer 220a may be disposed in the first opening 241a, a transmission layer 220b may be disposed in the second opening 241b, and a second color conversion layer 220c may be disposed in the third opening 241c. The second insulating layer 250 may include first opening portions 251a to third opening portions 251c corresponding to the first openings 241a to the third openings 241c, respectively.

[0161] like Figure 5 As shown, the first insulating layer 240 included in the display device 1 according to the embodiment may further include a first auxiliary opening 241d and a second auxiliary opening 241e. A first auxiliary color conversion layer 220d may be disposed in the first auxiliary opening 241d, and a second auxiliary color conversion layer 220e may be disposed in the second auxiliary opening 241e. Furthermore, a first auxiliary color filter layer 210d may be disposed between the upper substrate 200 and the first auxiliary color conversion layer 220d, and a second auxiliary color filter layer 210e may be disposed between the upper substrate 200 and the second auxiliary color conversion layer 220e.

[0162] like Figure 9 As shown, the first insulating layer 240 included in the display device 1 according to another embodiment may include a first opening 241a and a third opening 241c, and the first opening 241a and the third opening 241c may respectively include a first auxiliary extension portion 242a and a second auxiliary extension portion 242c. A first color conversion layer 220a may be disposed in the first auxiliary extension portion 242a, and a second color conversion layer 220c may be disposed in the second auxiliary extension portion 242c. Furthermore, a first color filter layer 210a may be disposed between the upper substrate 200 and the first color conversion layer 220a, and a third color filter layer 210c may be disposed between the upper substrate 200 and the second color conversion layer 220c.

[0163] Therefore, even though the sizes of the first opening 241a to the third opening 241c are different from each other, or the sizes of the first emission area EA1 to the third emission area EA3 are different from each other, the reflected color formed by external light on the display device 1 can become black without deviating from the set color when the display device 1 is not driven.

[0164] Although the present disclosure primarily describes a display device, it is not limited thereto. For example, methods of manufacturing a display device will also fall within the scope of this disclosure.

[0165] According to one or more embodiments, a display device can be implemented in which the color of reflected light formed by external light reflected from the display device is improved. The scope of this disclosure is not limited to these aspects and features.

[0166] It should be understood that the embodiments described herein should be considered merely descriptive and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. While some embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various suitable changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims and their equivalents.

Claims

1. A display device, comprising: Lower substrate; A first light-emitting device, a second light-emitting device, and a third light-emitting device are arranged on the lower substrate; An upper substrate is arranged to face the lower substrate and includes a first emitting region corresponding to the first light-emitting device, a second emitting region corresponding to the second light-emitting device, a third emitting region corresponding to the third light-emitting device, and a non-emitting region, wherein the non-emitting region is the area of ​​the upper substrate other than the first emitting region to the third emitting region; A first insulating layer is disposed on the upper substrate and has a first opening corresponding to the first emitting region, a second opening corresponding to the second emitting region, and a first auxiliary opening corresponding to the non-emitting region and positioned in a first direction relative to the first opening; A first color conversion layer is disposed in the first opening and includes a first quantum dot to convert incident light into light of a first color; A first auxiliary color conversion layer is disposed in the first auxiliary opening and includes the first quantum dot to convert incident light into light of the first color; as well as A second insulating layer is disposed on the first insulating layer and has a first opening portion corresponding to the first opening and the first auxiliary opening.

2. The display device according to claim 1, further comprising a transmissive layer disposed in the second opening, in, The second insulating layer also has a second opening portion corresponding to the second opening and having an extension portion extending in a second direction and exposing at least a portion of the first insulating layer, the second direction being opposite to the first direction.

3. The display device according to claim 2, further comprising: A second color conversion layer is arranged to correspond to the third emission region and includes a second quantum dot to convert incident light into light of a second color. as well as A second auxiliary color conversion layer is arranged corresponding to the non-emissive region and includes the second quantum dots to convert incident light into light of the second color. The first insulating layer further comprises a third opening and a second auxiliary opening. The third opening corresponds to the third emitting region and has a second color conversion layer located therein. The second auxiliary opening corresponds to the non-emitting region, is positioned relative to the third opening in the first direction, and has a second auxiliary color conversion layer located therein. The second insulating layer also has a third opening portion corresponding to the third opening and the second auxiliary opening.

4. The display device according to claim 3, wherein, Both the first opening and the third opening are smaller in size than the second opening.

5. The display device according to claim 3, wherein, The second opening is arranged between the first auxiliary opening and the second auxiliary opening.

6. The display device according to claim 3, wherein, The first color is red, and the second color is green.

7. The display device according to claim 1, further comprising: A first color filter layer is located between the upper substrate and the first color conversion layer; as well as A first auxiliary color filter layer is located between the upper substrate and the first auxiliary color conversion layer.

8. The display device according to claim 1, wherein, The surface of the first insulating layer exposed by the first opening is hydrophobic.

9. The display device according to claim 1, wherein, At least one of the first insulating layer and the second insulating layer is black or blue.

10. The display device according to claim 3, wherein, On a plane, each of the first opening to the third opening has a square shape.

11. The display device according to claim 10, wherein, The extensions of the lines connecting the center of one of the openings from the first opening to the third opening to the centers of the other two openings from the first opening to the third opening intersect each other.

12. The display device according to claim 1, wherein, The first to the third light-emitting devices emit light that is a mixture of blue and green light.

13. A display device, comprising: Lower substrate; A first light-emitting device, a second light-emitting device, and a third light-emitting device are arranged on the lower substrate; An upper substrate is arranged to face the lower substrate and includes a first emitting region corresponding to the first light-emitting device, a second emitting region corresponding to the second light-emitting device, a third emitting region corresponding to the third light-emitting device, and a non-emitting region, wherein the non-emitting region is the area of ​​the upper substrate other than the first emitting region to the third emitting region; A first insulating layer is disposed on the upper substrate and has a first opening corresponding to the first emission region and a second opening corresponding to the second emission region; A first color conversion layer is disposed in the first opening and includes a first quantum dot to convert incident light into light of a first color; as well as A second insulating layer is disposed on the first insulating layer and has a first opening portion corresponding to the first opening. The first opening has a first auxiliary extension portion extending toward the non-emission region along a first direction, and the first opening portion has a first extension portion extending toward the non-emission region along the first direction.

14. The display device according to claim 13, further comprising a transmissive layer disposed in the second opening, in, The second insulating layer also has a second opening portion corresponding to the second opening and having a second extension portion extending in a second direction and exposing at least a portion of the first insulating layer, the second direction being opposite to the first direction.

15. The display device according to claim 14, wherein, On a plane, the second opening has a square shape.

16. The display device according to claim 14, further comprising: A second color conversion layer is arranged to correspond to the third emission region and includes second quantum dots to convert incident light into light of a second color. The first insulating layer further has a third opening, which corresponds to the third emitting region and has a second color conversion layer located therein. The second insulating layer also has a third opening portion corresponding to the third opening, and The third opening has a second auxiliary extension portion extending toward the non-emission region along the first direction, and the third opening portion has a third extension portion extending toward the non-emission region along the first direction.

17. The display device according to claim 16, further comprising: A first color filter layer is located between the upper substrate and the first color conversion layer; A second color filter layer is located between the upper substrate and the transmission layer; as well as A third color filter layer is located between the upper substrate and the second color conversion layer.

18. The display device according to claim 16, wherein, The second opening is disposed between the first auxiliary extension portion of the first opening and the second auxiliary extension portion of the third opening.

19. The display device according to claim 13, wherein, The first to the third light-emitting devices emit light that is a mixture of blue and green light.

20. The display device according to claim 13, wherein, On a plane, the first opening has an "L" shape.

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